<configuration>
  <system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.SQLite"/>
      <add name="SQLite Data Provider" invariant="System.Data.SQLite" 
           description=".Net Framework Data Provider for SQLite"
           type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite,
                 Version=1.0.42.0, Culture=neutral,
                 PublicKeyToken=db937bc2d44ff139"/>
    </DbProviderFactories>
  </system.data>
</configuration>
</pre>
      </div>
      <p>

<configuration>
  <system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.SQLite"/>
      <add name="SQLite Data Provider" invariant="System.Data.SQLite" 
           description=".Net Framework Data Provider for SQLite"
           type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite,
                 Version=1.0.44.0, Culture=neutral,
                 PublicKeyToken=db937bc2d44ff139"/>
    </DbProviderFactories>
  </system.data>
</configuration>
</pre>
      </div>
      <p>

        with that one table are analyzed.</p>
      <p>
        The initial implementation stores all statistics in a single table named <b>sqlite_stat1</b>.
        Future enhancements may create additional tables with the same name pattern except
        with the "1" changed to a different digit. The <b>sqlite_stat1</b> table cannot be <a href="lang_droptable.html">DROP</a>ped, but all the content can be <a href="lang_delete.html">
          DELETE</a>d which has the same effect.</p>
      <p>
      <hr>
        &nbsp;</p>

      <div id="footer">
        <p>
          &nbsp;</p>
        <p>
        </p>
      </div>
    </div>
    </div>
  </body>
</html>

        with that one table are analyzed.</p>
      <p>
        The initial implementation stores all statistics in a single table named <b>sqlite_stat1</b>.
        Future enhancements may create additional tables with the same name pattern except
        with the "1" changed to a different digit. The <b>sqlite_stat1</b> table cannot be <a href="lang_droptable.html">DROP</a>ped, but all the content can be <a href="lang_delete.html">
          DELETE</a>d which has the same effect.</p>
      <p>

        &nbsp;</p>
      <hr>
      <div id="footer">
        <p>
          &nbsp;</p>
        <p>
        </p>
      </div>
    </div>
    </div>
  </body>
</html>

        of actually executing the command, the SQLite library will report back the sequence
        of virtual machine instructions it would have used to execute the command had the
        EXPLAIN keyword not been present. For additional information about virtual machine
        instructions see the <a href="http://www.sqlite.org/arch.html">architecture description</a>
        or the documentation on <a href="http://www.sqlite.org/opcode.html">available opcodes</a>
        for the virtual machine.</p>
      <p>
      <hr>
        &nbsp;</p>

      <div id="footer">
        <p>
          &nbsp;</p>
        <p>
        </p>
      </div>
    </div>
    </div>
  </body>
</html>

        of actually executing the command, the SQLite library will report back the sequence
        of virtual machine instructions it would have used to execute the command had the
        EXPLAIN keyword not been present. For additional information about virtual machine
        instructions see the <a href="http://www.sqlite.org/arch.html">architecture description</a>
        or the documentation on <a href="http://www.sqlite.org/opcode.html">available opcodes</a>
        for the virtual machine.</p>
      <p>

        &nbsp;</p>
      <hr>
      <div id="footer">
        <p>
          &nbsp;</p>
        <p>
        </p>
      </div>
    </div>
    </div>
  </body>
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        UNION ALL operators combine the results of the SELECTs to the right and left into
        a single big table. The difference is that in UNION all result rows are distinct
        where in UNION ALL there may be duplicates. The INTERSECT operator takes the intersection
        of the results of the left and right SELECTs. EXCEPT takes the result of left SELECT
        after removing the results of the right SELECT. When three or more SELECTs are connected
        into a compound, they group from left to right.</p>
      <p>
      <hr>
        &nbsp;</p>

      <div id="footer">
        <p>
          &nbsp;</p>
        <p>
        </p>
      </div>
    </div>
    </div>
  </body>
</html>

        UNION ALL operators combine the results of the SELECTs to the right and left into
        a single big table. The difference is that in UNION all result rows are distinct
        where in UNION ALL there may be duplicates. The INTERSECT operator takes the intersection
        of the results of the left and right SELECTs. EXCEPT takes the result of left SELECT
        after removing the results of the right SELECT. When three or more SELECTs are connected
        into a compound, they group from left to right.</p>
      <p>

        &nbsp;</p>
      <hr>
      <div id="footer">
        <p>
          &nbsp;</p>
        <p>
        </p>
      </div>
    </div>
    </div>
  </body>
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<html dir="LTR" xmlns="http://www.w3.org/1999/xhtml" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:tool="http://www.microsoft.com/tooltip" xmlns:ndoc="urn:ndoc-preprocess">
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    <title>TYPES</title>
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      <table width="100%" id="topTable">
        <tr id="headerTableRow1">
          <td align="left">
            TYPES&nbsp;</td>
        </tr>
        <tr id="headerTableRow2">
          <td align="left">
            <span id="nsrTitle">SQLite Language Reference Documentation</span>
          </td>
        </tr>
        <tr id="headerTableRow3" style="display:none">
          <td>
            <a id="seeAlsoSectionLink" href="#seeAlsoToggle" onclick="OpenSection(seeAlsoToggle)">See Also</a>
            <a id="exampleSectionLink" href="#codeExampleToggle" onclick="OpenSection(codeExampleToggle)">Example</a>
          </td>
        </tr>
     </table>
      <table width="100%" id="bottomTable" cellspacing="0" cellpadding="0" style="display:none">
        <tr>
          <td>
            <span onclick="ExpandCollapseAll(toggleAllImage)" style="cursor:default;" onkeypress="ExpandCollapseAll_CheckKey(toggleAllImage)" tabindex="0">
              <img ID="toggleAllImage" class="toggleAll" src="collall.gif" />
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              <label id="expandAllLabel" for="toggleAllImage" style="display: none;">
							Expand All
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      </table>
    </div>
    <div id="mainSection">
    <div id="mainBody">
      <h1 class="heading">
        SQL As Understood By SQLite (sortof)</h1>
      <h4>
        TYPES</h4>
      <p>
        <table cellpadding="10">
          <tr>
            <td align="right" width="1%" nowrap>
              <i><font color="#ff3434">sql-statement</font></i> ::=</td>
            <td>
              <b><font color="#2c2cf0">TYPES </font></b>[<b><font color="#2c2cf0"></font></b><i><font
                color="#ff3434">datatype name</font></i><b><font color="#2c2cf0"></font></b>][,<b><font color="#2c2cf0"></font></b><i><font
                color="#ff3434">datatype name</font></i><b><font color="#2c2cf0"></font></b>][,<b><font color="#2c2cf0"></font></b><i><font
                color="#ff3434">datatype
                      name</font></i><b><font color="#2c2cf0"></font></b>][,<b><font color="#2c2cf0"></font></b><i><font
                color="#ff3434">...</font></i>] ; <em><span style="color: #ff3434">select-stmt</span></em></td>            
          </tr>
          <tr>
          <td align="right" width="1%" nowrap>
          <i><font color="#ff3434">select-stmt</font></i> ::=</td>
          <td>
            see <a href="lang_select.html">SELECT</a></td>
          </tr>
        </table>
      </p>
      <p>
        Use the TYPES keyword before a SELECT statement to provide the SQLite ADO.NET provider
        a list of return datatypes to expect from the subsequent SELECT statement.&nbsp;
      </p>
      <p>
        This is a language extension (aka <strong>hack</strong>) to SQLite specifically for the ADO.NET data
        provider.&nbsp; It is a pseudo-statement, meaning only the ADO.NET provider understands
        it.</p>
      <h3>
        Background</h3>
      <p>
        Due to SQLite's typeless nature, there are certain kinds of queries for which the
        ADO.NET provider cannot determine the proper return data type.&nbsp; Scalar and
        aggregate functions pose a particular problem because
        there is no requirement for a given scalar or aggregate function to return any particular
        datatype.&nbsp; As a matter of fact, scalar functions could theoretically return
        a different datatype for every row or column in a query and this is perfectly legal
        from SQLite's point of view.</p>
      <p>
        Since ADO.NET is designed around a typed system and we're shoe-horning SQLite into
        it, this keyword helps the provider out in cases where the return type cannot be easily determined.</p>
      <p>
        This command must be used in conjunction with a SELECT statement.&nbsp; It only
        works when both the TYPES keyword and its value(s) are passed along with a SELECT
        statement as a single semi-colon separated unit.</p>
      <h3>
        Examples</h3>
      <p>
        <strong><span style="color: #2c2cf0">TYPES</span> [bigint], [int], [smallint], [tinyint];<br />
          <span style="color: #2c2cf0">SELECT</span> 1, 2, 3, 4;</strong></p>
      <p>
        The above query would return the columns as types System.Int64, System.Int32, System.Int16
        and System.Byte respectively.</p>
      <p>
        <strong><span style="color: #2c2cf0">TYPES</span> [bigint], [int], , [tinyint];<br />
          <span style="color: #2c2cf0">SELECT</span> 1, 2, 3, 4;</strong></p>
      <p>
        In this sample, only columns 1, 2 and 4 would have explicit typing.&nbsp; Column
        3's datatype would pass though the system and be discovered normally.</p>
      <p>
        <strong><span style="color: #2c2cf0">TYPES</span> real;<br />
          <span style="color: #2c2cf0">SELECT</span> SUM(Cost) FROM [Products];</strong></p>
      <p>
        The above query explicitly tells the provider that the SUM aggregate function returns
        a System.Double.</p>
      <h3>
        Usage Notes</h3>
      <ul>
        <li>You cannot use parameters in the TYPES statement.</li>
        <li>The TYPES statement must be immediately followed by a SELECT statement.</li>
        <li>It is legal to pass multiple TYPES and SELECT statements in a multi-statement
          command.</li>
        <li>You may enclose datatypes in quotes <strong>""</strong> or brackets <strong>[]</strong>
          or those <strong>``</strong> thingies if you want.<br />
        </li>
      </ul>
      <hr>
      <div id="footer">
        <p>
          &nbsp;</p>
        <p>
        </p>
      </div>
    </div>
    </div>
  </body>
</html>

<html dir="LTR" xmlns="http://www.w3.org/1999/xhtml" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:tool="http://www.microsoft.com/tooltip" xmlns:ndoc="urn:ndoc-preprocess">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252" />
    <title>VACUUM</title>
    <link rel="stylesheet" type="text/css" href="ndoc.css"> </link>
    <link rel="stylesheet" type="text/css" href="user.css"> </link>
    <script type="text/javascript" src="ndoc.js"> </script>
  </head>
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    <input type="hidden" id="userDataCache" class="userDataStyle" />
    <input type="hidden" id="hiddenScrollOffset" />
................................................................................
    <img id="expandAllImage" style="display:none; height:0; width:0;" src="expall.gif" />
    <img id="copyImage" style="display:none; height:0; width:0;" src="copycode.gif" />
    <img id="copyHoverImage" style="display:none; height:0; width:0;" src="copycodeHighlight.gif" />
    <div id="header">
      <table width="100%" id="topTable">
        <tr id="headerTableRow1">
          <td align="left">
            VACUUM&nbsp;</td>
        </tr>
        <tr id="headerTableRow2">
          <td align="left">
            <span id="nsrTitle">SQLite Language Reference Documentation</span>
          </td>
        </tr>
        <tr id="headerTableRow3" style="display:none">
................................................................................
      </table>
    </div>
    <div id="mainSection">
    <div id="mainBody">
      <h1 class="heading">
        SQL As Understood By SQLite</h1>
      <h4>
        VACUUM</h4>
      <p>
        <table cellpadding="10">
          <tr>
            <td align="right" width="1%" nowrap>
              <i><font color="#ff3434">sql-statement</font></i> ::=</td>
            <td>
              <b><font color="#2c2cf0">VACUUM </font></b>[<b><font color="#2c2cf0"></font></b><i><font
                color="#ff3434">index-or-table-name</font></i><b><font color="#2c2cf0"></font></b>]<b><font


                  color="#2c2cf0"></font></b></td>

          </tr>
        </table>
      </p>
      <p>
        The VACUUM command is an SQLite extension modeled after a similar command found
        in PostgreSQL. If VACUUM is invoked with the name of a table or index then it is
        suppose to clean up the named table or index. In version 1.0 of SQLite, the VACUUM
................................................................................
      <p>
        This command will fail if there is an active transaction. This command has no effect
        on an in-memory database.</p>
      <p>
        As of SQLite version 3.1, an alternative to using the VACUUM command is auto-vacuum
        mode, enabled using the <a href="pragma.html#pragma_auto_vacuum">auto_vacuum pragma</a>.</p>
      <p>
      <hr>
        &nbsp;</p>

      <div id="footer">
        <p>
          &nbsp;</p>
        <p>
        </p>
      </div>
    </div>
    </div>
  </body>
</html>

<html dir="LTR" xmlns="http://www.w3.org/1999/xhtml" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:tool="http://www.microsoft.com/tooltip" xmlns:ndoc="urn:ndoc-preprocess">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252" />
    <title>TYPES</title>
    <link rel="stylesheet" type="text/css" href="ndoc.css"> </link>
    <link rel="stylesheet" type="text/css" href="user.css"> </link>
    <script type="text/javascript" src="ndoc.js"> </script>
  </head>
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    <input type="hidden" id="userDataCache" class="userDataStyle" />
    <input type="hidden" id="hiddenScrollOffset" />
................................................................................
    <img id="expandAllImage" style="display:none; height:0; width:0;" src="expall.gif" />
    <img id="copyImage" style="display:none; height:0; width:0;" src="copycode.gif" />
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    <div id="header">
      <table width="100%" id="topTable">
        <tr id="headerTableRow1">
          <td align="left">
            TYPES&nbsp;</td>
        </tr>
        <tr id="headerTableRow2">
          <td align="left">
            <span id="nsrTitle">SQLite Language Reference Documentation</span>
          </td>
        </tr>
        <tr id="headerTableRow3" style="display:none">
................................................................................
      </table>
    </div>
    <div id="mainSection">
    <div id="mainBody">
      <h1 class="heading">
        SQL As Understood By SQLite</h1>
      <h4>
        TYPES</h4>
      <p>
        <table cellpadding="10">
          <tr>
            <td align="right" width="1%" nowrap>
              <i><font color="#ff3434">sql-statement</font></i> ::=</td>
            <td>
              <b><font color="#2c2cf0">TYPES </font></b>[<b><font color="#2c2cf0"></font></b><i><font
                color="#ff3434">datatype name</font></i><b><font color="#2c2cf0"></font></b>][,<b><font color="#2c2cf0"></font></b><i><font
                color="#ff3434">datatype name</font></i><b><font color="#2c2cf0"></font></b>][,<b><font color="#2c2cf0"></font></b><i><font
                color="#ff3434">datatype
                      name</font></i><b><font color="#2c2cf0"></font></b>][,<b><font color="#2c2cf0"></font></b><i><font
                color="#ff3434">...</font></i>] ; <em><span style="color: #ff3434">select stmt</span></em></td>
          </tr>
        </table>
      </p>
      <p>
        The VACUUM command is an SQLite extension modeled after a similar command found
        in PostgreSQL. If VACUUM is invoked with the name of a table or index then it is
        suppose to clean up the named table or index. In version 1.0 of SQLite, the VACUUM
................................................................................
      <p>
        This command will fail if there is an active transaction. This command has no effect
        on an in-memory database.</p>
      <p>
        As of SQLite version 3.1, an alternative to using the VACUUM command is auto-vacuum
        mode, enabled using the <a href="pragma.html#pragma_auto_vacuum">auto_vacuum pragma</a>.</p>
      <p>

        &nbsp;</p>
      <hr>
      <div id="footer">
        <p>
          &nbsp;</p>
        <p>
        </p>
      </div>
    </div>
    </div>
  </body>
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        </tr>
      </table>
    </div>
    <div id="mainSection">
    <div id="mainBody">

      <h1 class="heading">Version History</h1>





















    <p><b>1.0.42.0 - June 1, 2007</b></p>
    <ul>
    <li>Code merge with SQLite 3.3.17</li>
      <li>Changed the SQLiteFunction static constructor so it only enumerates loaded modules
        that have referenced the SQLite assembly, which hopefully should cut down dramatically
        the time it takes for that function to execute.&nbsp;</li>
      <li>Added the FTS2 full-text search extension to the project.&nbsp; Look for FTS1

        </tr>
      </table>
    </div>
    <div id="mainSection">
    <div id="mainBody">

      <h1 class="heading">Version History</h1>
    <p><b>1.0.44.0 - July 22, 2007</b></p>
    <ul>
    <li>Code merge with SQLite 3.4.1</li>
      <li>Fixed a bug in SQLiteConnection.Open() which threw the wrong kind of error in
        the wrong kind of way when a database file could not be opened or created.&nbsp;</li>
      <li>Small enhancements to the TYPES keyword, and added documentation for it in the
        help file.</li>
      <li>Hopefully fixed the occasional SQLITE_BUSY errors that cropped up when starting
        a transaction.&nbsp; Usually occurred in high-contention scenarios, and the underlying
        SQLite engine bypasses the busy handler in this scenario to return immediately.</li>
    </ul>
    <p><b>1.0.43.0 - June 21, 2007</b></p>
    <ul>
    <li>Code merge with SQLite 3.4.0</li>
      <li>Fixed a reuse bug in the SQLiteDataAdapter in conjunction with the SQLiteCommandBuilder.&nbsp;
      It's been there unnoticed for more than a year, so it looks like most folks never
      encountered it. </li>
      <li>Fixed an event handler bug in SQLiteCommandBuilder in which it could fail to unlatch
        from the DataAdapter when reused.&nbsp; Relates to the previous bugfix.</li>
      <li>Fixed a double-dispose bug in SQLiteStatement that triggered a SQLiteException.&nbsp;</li>
    </ul>
    <p><b>1.0.42.0 - June 1, 2007</b></p>
    <ul>
    <li>Code merge with SQLite 3.3.17</li>
      <li>Changed the SQLiteFunction static constructor so it only enumerates loaded modules
        that have referenced the SQLite assembly, which hopefully should cut down dramatically
        the time it takes for that function to execute.&nbsp;</li>
      <li>Added the FTS2 full-text search extension to the project.&nbsp; Look for FTS1

//      Major Version
//      Minor Version 
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Revision and Build Numbers 
// by using the '*' as shown below:
[assembly: AssemblyVersion("1.0.31.0")]
[assembly: AssemblyFileVersion("1.0.31.0")]
[assembly: AssemblyDelaySignAttribute(false)]
[assembly: AssemblyKeyFileAttribute("..\\System.Data.SQLite\\System.Data.SQLite.snk")]
[assembly: AssemblyKeyNameAttribute("")]

//      Major Version
//      Minor Version 
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Revision and Build Numbers 
// by using the '*' as shown below:
[assembly: AssemblyVersion("1.0.32.0")]
[assembly: AssemblyFileVersion("1.0.32.0")]
[assembly: AssemblyDelaySignAttribute(false)]
[assembly: AssemblyKeyFileAttribute("..\\System.Data.SQLite\\System.Data.SQLite.snk")]
[assembly: AssemblyKeyNameAttribute("")]

    <None Include="CtcComponents\PkgCmdID.h" />
  </ItemGroup>
  <ItemGroup>
    <Folder Include="Properties\" />
    <Folder Include="Resources\" />
  </ItemGroup>
  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
  <Import Project="C:\Program Files (x86)\Visual Studio 2005 SDK\2006.09\VisualStudioIntegration\Tools\Build\Microsoft.VsSDK.targets" />
  <PropertyGroup>
    <PostBuildEvent>
    </PostBuildEvent>
  </PropertyGroup>
</Project>

    <None Include="CtcComponents\PkgCmdID.h" />
  </ItemGroup>
  <ItemGroup>
    <Folder Include="Properties\" />
    <Folder Include="Resources\" />
  </ItemGroup>
  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
  <Import Project="C:\Program Files (x86)\Visual Studio 2005 SDK\2007.02\VisualStudioIntegration\Tools\Build\Microsoft.VsSDK.targets" />
  <PropertyGroup>
    <PostBuildEvent>
    </PostBuildEvent>
  </PropertyGroup>
</Project>

			<Tool
				Name="VCMIDLTool"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS1"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
			/>
			<Tool
				Name="VCCLCompilerTool"
				ExecutionBucket="7"
				AdditionalOptions="/GS-"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS1"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="2"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS1"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="3"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS1"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
			<Tool
				Name="VCMIDLTool"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS1"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
				TargetEnvironment="1"
			/>
			<Tool
				Name="VCCLCompilerTool"
				ExecutionBucket="7"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS1"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="2"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS1"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="3"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS1"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>

			<Tool
				Name="VCMIDLTool"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS1;SQLITE_CORE"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
			/>
			<Tool
				Name="VCCLCompilerTool"
				ExecutionBucket="7"
				AdditionalOptions="/GS-"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS1;SQLITE_CORE"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="2"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN64;_DEBUG;_LIB;SQLITE_ENABLE_FTS1;SQLITE_CORE"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="3"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN64;_DEBUG;_LIB;SQLITE_ENABLE_FTS1;SQLITE_CORE"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
			<Tool
				Name="VCMIDLTool"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS1;SQLITE_CORE"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
				TargetEnvironment="1"
			/>
			<Tool
				Name="VCCLCompilerTool"
				ExecutionBucket="7"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS1;SQLITE_CORE"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="2"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN64;NDEBUG;_LIB;SQLITE_ENABLE_FTS1;SQLITE_CORE"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="3"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN64;NDEBUG;_LIB;SQLITE_ENABLE_FTS1;SQLITE_CORE"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>

      return 0;
    }
    case ' ': case '\t': case '\n': case '\f': case '\r': {
      for(i=1; safe_isspace(z[i]); i++){}
      *tokenType = TOKEN_SPACE;
      return i;
    }

    case '\'':
    case '"': {
      int delim = z[0];
      for(i=1; (c=z[i])!=0; i++){
        if( c==delim ){
          if( z[i+1]==delim ){
            i++;

      return 0;
    }
    case ' ': case '\t': case '\n': case '\f': case '\r': {
      for(i=1; safe_isspace(z[i]); i++){}
      *tokenType = TOKEN_SPACE;
      return i;
    }
    case '`':
    case '\'':
    case '"': {
      int delim = z[0];
      for(i=1; (c=z[i])!=0; i++){
        if( c==delim ){
          if( z[i+1]==delim ){
            i++;

			<Tool
				Name="VCMIDLTool"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS2"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
			/>
			<Tool
				Name="VCCLCompilerTool"
				ExecutionBucket="7"
				AdditionalOptions="/GS-"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS2"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="2"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS2"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="3"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS2"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
			<Tool
				Name="VCMIDLTool"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS2"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
			<Tool
				Name="VCMIDLTool"
				TargetEnvironment="1"
			/>
			<Tool
				Name="VCCLCompilerTool"
				ExecutionBucket="7"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS2"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="2"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS2"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="3"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS2"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
			<File
				RelativePath=".\fts2_hash.c"
				>
			</File>
			<File
				RelativePath=".\fts2_porter.c"
				>




			</File>
			<File
				RelativePath=".\fts2_tokenizer1.c"
				>
			</File>
		</Filter>
		<Filter

			<Tool
				Name="VCMIDLTool"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS2;SQLITE_CORE"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
			/>
			<Tool
				Name="VCCLCompilerTool"
				ExecutionBucket="7"
				AdditionalOptions="/GS-"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;SQLITE_ENABLE_FTS2;SQLITE_CORE"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="2"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN64;_DEBUG;_LIB;SQLITE_ENABLE_FTS2;SQLITE_CORE"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="3"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN64;_DEBUG;_LIB;SQLITE_ENABLE_FTS2;SQLITE_CORE"
				RuntimeLibrary="3"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
................................................................................
			<Tool
				Name="VCMIDLTool"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS2;SQLITE_CORE"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
			<Tool
				Name="VCMIDLTool"
				TargetEnvironment="1"
			/>
			<Tool
				Name="VCCLCompilerTool"
				ExecutionBucket="7"
				Optimization="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;SQLITE_ENABLE_FTS2;SQLITE_CORE"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="2"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN64;NDEBUG;_LIB;SQLITE_ENABLE_FTS2;SQLITE_CORE"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
				Name="VCMIDLTool"
				TargetEnvironment="3"
			/>
			<Tool
				Name="VCCLCompilerTool"
				FavorSizeOrSpeed="1"
				AdditionalIncludeDirectories="..\src"
				PreprocessorDefinitions="WIN64;NDEBUG;_LIB;SQLITE_ENABLE_FTS2;SQLITE_CORE"
				StringPooling="true"
				ExceptionHandling="0"
				BufferSecurityCheck="false"
				EnableFunctionLevelLinking="true"
				RuntimeTypeInfo="false"
				UsePrecompiledHeader="0"
			/>
................................................................................
			<File
				RelativePath=".\fts2_hash.c"
				>
			</File>
			<File
				RelativePath=".\fts2_porter.c"
				>
			</File>
			<File
				RelativePath=".\fts2_tokenizer.c"
				>
			</File>
			<File
				RelativePath=".\fts2_tokenizer1.c"
				>
			</File>
		</Filter>
		<Filter

/* The author disclaims copyright to this source code.

 *






 * This is an SQLite module implementing full-text search.
 */

/*
** The code in this file is only compiled if:
**
**     * The FTS2 module is being built as an extension
**       (in which case SQLITE_CORE is not defined), or
**
................................................................................
  DLReader reader;                 /* Result reader if result not empty */
} fulltext_cursor;

static struct fulltext_vtab *cursor_vtab(fulltext_cursor *c){
  return (fulltext_vtab *) c->base.pVtab;
}

static const sqlite3_module fulltextModule;   /* forward declaration */

/* Return a dynamically generated statement of the form
 *   insert into %_content (rowid, ...) values (?, ...)
 */
static const char *contentInsertStatement(fulltext_vtab *v){
  StringBuffer sb;
  int i;
................................................................................

  while( (rc=sqlite3_step(s))!=SQLITE_DONE && rc!=SQLITE_ROW ){
    sqlite3_stmt *pNewStmt;

    if( rc==SQLITE_BUSY ) continue;
    if( rc!=SQLITE_ERROR ) return rc;

    rc = sqlite3_reset(s);
    if( rc!=SQLITE_SCHEMA ) return SQLITE_ERROR;

    v->pFulltextStatements[iStmt] = NULL;   /* Still in s */
    rc = sql_get_statement(v, iStmt, &pNewStmt);
    if( rc!=SQLITE_OK ) goto err;
    *ppStmt = pNewStmt;

    rc = sqlite3_transfer_bindings(s, pNewStmt);
    if( rc!=SQLITE_OK ) goto err;

    rc = sqlite3_finalize(s);
    if( rc!=SQLITE_OK ) return rc;
    s = pNewStmt;
  }
  return rc;

 err:
  sqlite3_finalize(s);
  return rc;
}
................................................................................

  while( (rc=sqlite3_step(s))!=SQLITE_DONE && rc!=SQLITE_ROW ){
    sqlite3_stmt *pNewStmt;

    if( rc==SQLITE_BUSY ) continue;
    if( rc!=SQLITE_ERROR ) return rc;

    rc = sqlite3_reset(s);
    if( rc!=SQLITE_SCHEMA ) return SQLITE_ERROR;





    v->pLeafSelectStmts[idx] = NULL;   /* Still in s */
    rc = sql_get_leaf_statement(v, idx, &pNewStmt);
    if( rc!=SQLITE_OK ) goto err;
    *ppStmt = pNewStmt;

    rc = sqlite3_transfer_bindings(s, pNewStmt);
    if( rc!=SQLITE_OK ) goto err;

    rc = sqlite3_finalize(s);
    if( rc!=SQLITE_OK ) return rc;
    s = pNewStmt;

  }
  return rc;

 err:
  sqlite3_finalize(s);
  return rc;
}

/* insert into %_content (rowid, ...) values ([rowid], [pValues]) */
static int content_insert(fulltext_vtab *v, sqlite3_value *rowid,
                          sqlite3_value **pValues){
  sqlite3_stmt *s;
................................................................................
      return 0;
    }
    case ' ': case '\t': case '\n': case '\f': case '\r': {
      for(i=1; safe_isspace(z[i]); i++){}
      *tokenType = TOKEN_SPACE;
      return i;
    }

    case '\'':
    case '"': {
      int delim = z[0];
      for(i=1; (c=z[i])!=0; i++){
        if( c==delim ){
          if( z[i+1]==delim ){
            i++;
................................................................................

/*
** Build a new sqlite3_vtab structure that will describe the
** fulltext index defined by spec.
*/
static int constructVtab(
  sqlite3 *db,              /* The SQLite database connection */

  TableSpec *spec,          /* Parsed spec information from parseSpec() */
  sqlite3_vtab **ppVTab,    /* Write the resulting vtab structure here */
  char **pzErr              /* Write any error message here */
){
  int rc;
  int n;
  fulltext_vtab *v = 0;
  const sqlite3_tokenizer_module *m = NULL;
  char *schema;




  v = (fulltext_vtab *) malloc(sizeof(fulltext_vtab));
  if( v==0 ) return SQLITE_NOMEM;
  CLEAR(v);
  /* sqlite will initialize v->base */
  v->db = db;
  v->zDb = spec->zDb;       /* Freed when azColumn is freed */
................................................................................
  spec->azContentColumn = 0;
  v->azColumn = spec->azColumn;
  spec->azColumn = 0;

  if( spec->azTokenizer==0 ){
    return SQLITE_NOMEM;
  }
  /* TODO(shess) For now, add new tokenizers as else if clauses. */

  if( spec->azTokenizer[0]==0 || startsWith(spec->azTokenizer[0], "simple") ){
    sqlite3Fts2SimpleTokenizerModule(&m);
  }else if( startsWith(spec->azTokenizer[0], "porter") ){
    sqlite3Fts2PorterTokenizerModule(&m);

  }else{



    *pzErr = sqlite3_mprintf("unknown tokenizer: %s", spec->azTokenizer[0]);
    rc = SQLITE_ERROR;
    goto err;
  }

  for(n=0; spec->azTokenizer[n]; n++){}
  if( n ){
    rc = m->xCreate(n-1, (const char*const*)&spec->azTokenizer[1],
                    &v->pTokenizer);
  }else{
    rc = m->xCreate(0, 0, &v->pTokenizer);
  }
................................................................................
  sqlite3_vtab **ppVTab,
  char **pzErr
){
  TableSpec spec;
  int rc = parseSpec(&spec, argc, argv, pzErr);
  if( rc!=SQLITE_OK ) return rc;

  rc = constructVtab(db, &spec, ppVTab, pzErr);
  clearTableSpec(&spec);
  return rc;
}

/* The %_content table holds the text of each document, with
** the rowid used as the docid.
*/
................................................................................
                "  leaves_end_block integer,"
                "  end_block integer,"
                "  root blob,"
                "  primary key(level, idx)"
                ");");
  if( rc!=SQLITE_OK ) goto out;

  rc = constructVtab(db, &spec, ppVTab, pzErr);

out:
  clearTableSpec(&spec);
  return rc;
}

/* Decide how to handle an SQL query. */
................................................................................
  int iFirst, iLast;
  fulltext_vtab *pFts;

  if( p->snippet.nMatch ) return;
  if( p->q.nTerms==0 ) return;
  pFts = p->q.pFts;
  nColumn = pFts->nColumn;
  iColumn = p->iCursorType;
  if( iColumn<0 || iColumn>=nColumn ){
    iFirst = 0;
    iLast = nColumn-1;
  }else{
    iFirst = iColumn;
    iLast = iColumn;
  }
................................................................................
  }else if( strcmp(zName,"offsets")==0 ){
    *pxFunc = snippetOffsetsFunc;
    return 1;
  }
  return 0;
}

























static const sqlite3_module fulltextModule = {
  /* iVersion      */ 0,
  /* xCreate       */ fulltextCreate,
  /* xConnect      */ fulltextConnect,
  /* xBestIndex    */ fulltextBestIndex,
  /* xDisconnect   */ fulltextDisconnect,
  /* xDestroy      */ fulltextDestroy,
  /* xOpen         */ fulltextOpen,
................................................................................
  /* xRowid        */ fulltextRowid,
  /* xUpdate       */ fulltextUpdate,
  /* xBegin        */ fulltextBegin,
  /* xSync         */ fulltextSync,
  /* xCommit       */ fulltextCommit,
  /* xRollback     */ fulltextRollback,
  /* xFindFunction */ fulltextFindFunction,

};






























int sqlite3Fts2Init(sqlite3 *db){




































  sqlite3_overload_function(db, "snippet", -1);
  sqlite3_overload_function(db, "offsets", -1);

  return sqlite3_create_module(db, "fts2", &fulltextModule, 0);


}










#if !SQLITE_CORE
int sqlite3_extension_init(sqlite3 *db, char **pzErrMsg,


                           const sqlite3_api_routines *pApi){

  SQLITE_EXTENSION_INIT2(pApi)
  return sqlite3Fts2Init(db);
}
#endif

#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS2) */

/*
** 2006 Oct 10
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This is an SQLite module implementing full-text search.
*/

/*
** The code in this file is only compiled if:
**
**     * The FTS2 module is being built as an extension
**       (in which case SQLITE_CORE is not defined), or
**
................................................................................
  DLReader reader;                 /* Result reader if result not empty */
} fulltext_cursor;

static struct fulltext_vtab *cursor_vtab(fulltext_cursor *c){
  return (fulltext_vtab *) c->base.pVtab;
}

static const sqlite3_module fts2Module;   /* forward declaration */

/* Return a dynamically generated statement of the form
 *   insert into %_content (rowid, ...) values (?, ...)
 */
static const char *contentInsertStatement(fulltext_vtab *v){
  StringBuffer sb;
  int i;
................................................................................

  while( (rc=sqlite3_step(s))!=SQLITE_DONE && rc!=SQLITE_ROW ){
    sqlite3_stmt *pNewStmt;

    if( rc==SQLITE_BUSY ) continue;
    if( rc!=SQLITE_ERROR ) return rc;

    /* If an SQLITE_SCHEMA error has occured, then finalizing this
     * statement is going to delete the fulltext_vtab structure. If
     * the statement just executed is in the pFulltextStatements[]
     * array, it will be finalized twice. So remove it before
     * calling sqlite3_finalize().
     */
    v->pFulltextStatements[iStmt] = NULL;
    rc = sqlite3_finalize(s);
    break;





  }
  return rc;

 err:
  sqlite3_finalize(s);
  return rc;
}
................................................................................

  while( (rc=sqlite3_step(s))!=SQLITE_DONE && rc!=SQLITE_ROW ){
    sqlite3_stmt *pNewStmt;

    if( rc==SQLITE_BUSY ) continue;
    if( rc!=SQLITE_ERROR ) return rc;

    /* If an SQLITE_SCHEMA error has occured, then finalizing this
     * statement is going to delete the fulltext_vtab structure. If

     * the statement just executed is in the pLeafSelectStmts[]
     * array, it will be finalized twice. So remove it before
     * calling sqlite3_finalize().
     */
    v->pLeafSelectStmts[idx] = NULL;







    rc = sqlite3_finalize(s);


    break;
  }




  return rc;
}

/* insert into %_content (rowid, ...) values ([rowid], [pValues]) */
static int content_insert(fulltext_vtab *v, sqlite3_value *rowid,
                          sqlite3_value **pValues){
  sqlite3_stmt *s;
................................................................................
      return 0;
    }
    case ' ': case '\t': case '\n': case '\f': case '\r': {
      for(i=1; safe_isspace(z[i]); i++){}
      *tokenType = TOKEN_SPACE;
      return i;
    }
    case '`':
    case '\'':
    case '"': {
      int delim = z[0];
      for(i=1; (c=z[i])!=0; i++){
        if( c==delim ){
          if( z[i+1]==delim ){
            i++;
................................................................................

/*
** Build a new sqlite3_vtab structure that will describe the
** fulltext index defined by spec.
*/
static int constructVtab(
  sqlite3 *db,              /* The SQLite database connection */
  fts2Hash *pHash,          /* Hash table containing tokenizers */
  TableSpec *spec,          /* Parsed spec information from parseSpec() */
  sqlite3_vtab **ppVTab,    /* Write the resulting vtab structure here */
  char **pzErr              /* Write any error message here */
){
  int rc;
  int n;
  fulltext_vtab *v = 0;
  const sqlite3_tokenizer_module *m = NULL;
  char *schema;

  char const *zTok;         /* Name of tokenizer to use for this fts table */
  int nTok;                 /* Length of zTok, including nul terminator */

  v = (fulltext_vtab *) malloc(sizeof(fulltext_vtab));
  if( v==0 ) return SQLITE_NOMEM;
  CLEAR(v);
  /* sqlite will initialize v->base */
  v->db = db;
  v->zDb = spec->zDb;       /* Freed when azColumn is freed */
................................................................................
  spec->azContentColumn = 0;
  v->azColumn = spec->azColumn;
  spec->azColumn = 0;

  if( spec->azTokenizer==0 ){
    return SQLITE_NOMEM;
  }


  zTok = spec->azTokenizer[0]; 
  if( !zTok ){
    zTok = "simple";

  }
  nTok = strlen(zTok)+1;

  m = (sqlite3_tokenizer_module *)sqlite3Fts2HashFind(pHash, zTok, nTok);
  if( !m ){
    *pzErr = sqlite3_mprintf("unknown tokenizer: %s", spec->azTokenizer[0]);
    rc = SQLITE_ERROR;
    goto err;
  }

  for(n=0; spec->azTokenizer[n]; n++){}
  if( n ){
    rc = m->xCreate(n-1, (const char*const*)&spec->azTokenizer[1],
                    &v->pTokenizer);
  }else{
    rc = m->xCreate(0, 0, &v->pTokenizer);
  }
................................................................................
  sqlite3_vtab **ppVTab,
  char **pzErr
){
  TableSpec spec;
  int rc = parseSpec(&spec, argc, argv, pzErr);
  if( rc!=SQLITE_OK ) return rc;

  rc = constructVtab(db, (fts2Hash *)pAux, &spec, ppVTab, pzErr);
  clearTableSpec(&spec);
  return rc;
}

/* The %_content table holds the text of each document, with
** the rowid used as the docid.
*/
................................................................................
                "  leaves_end_block integer,"
                "  end_block integer,"
                "  root blob,"
                "  primary key(level, idx)"
                ");");
  if( rc!=SQLITE_OK ) goto out;

  rc = constructVtab(db, (fts2Hash *)pAux, &spec, ppVTab, pzErr);

out:
  clearTableSpec(&spec);
  return rc;
}

/* Decide how to handle an SQL query. */
................................................................................
  int iFirst, iLast;
  fulltext_vtab *pFts;

  if( p->snippet.nMatch ) return;
  if( p->q.nTerms==0 ) return;
  pFts = p->q.pFts;
  nColumn = pFts->nColumn;
  iColumn = (p->iCursorType - QUERY_FULLTEXT);
  if( iColumn<0 || iColumn>=nColumn ){
    iFirst = 0;
    iLast = nColumn-1;
  }else{
    iFirst = iColumn;
    iLast = iColumn;
  }
................................................................................
  }else if( strcmp(zName,"offsets")==0 ){
    *pxFunc = snippetOffsetsFunc;
    return 1;
  }
  return 0;
}

/*
** Rename an fts2 table.
*/
static int fulltextRename(
  sqlite3_vtab *pVtab,
  const char *zName
){
  fulltext_vtab *p = (fulltext_vtab *)pVtab;
  int rc = SQLITE_NOMEM;
  char *zSql = sqlite3_mprintf(
    "ALTER TABLE %Q.'%q_content'  RENAME TO '%q_content';"
    "ALTER TABLE %Q.'%q_segments' RENAME TO '%q_segments';"
    "ALTER TABLE %Q.'%q_segdir'   RENAME TO '%q_segdir';"
    , p->zDb, p->zName, zName 
    , p->zDb, p->zName, zName 
    , p->zDb, p->zName, zName
  );
  if( zSql ){
    rc = sqlite3_exec(p->db, zSql, 0, 0, 0);
    sqlite3_free(zSql);
  }
  return rc;
}

static const sqlite3_module fts2Module = {
  /* iVersion      */ 0,
  /* xCreate       */ fulltextCreate,
  /* xConnect      */ fulltextConnect,
  /* xBestIndex    */ fulltextBestIndex,
  /* xDisconnect   */ fulltextDisconnect,
  /* xDestroy      */ fulltextDestroy,
  /* xOpen         */ fulltextOpen,
................................................................................
  /* xRowid        */ fulltextRowid,
  /* xUpdate       */ fulltextUpdate,
  /* xBegin        */ fulltextBegin,
  /* xSync         */ fulltextSync,
  /* xCommit       */ fulltextCommit,
  /* xRollback     */ fulltextRollback,
  /* xFindFunction */ fulltextFindFunction,
  /* xRename */       fulltextRename,
};

static void hashDestroy(void *p){
  fts2Hash *pHash = (fts2Hash *)p;
  sqlite3Fts2HashClear(pHash);
  sqlite3_free(pHash);
}

/*
** The fts2 built-in tokenizers - "simple" and "porter" - are implemented
** in files fts2_tokenizer1.c and fts2_porter.c respectively. The following
** two forward declarations are for functions declared in these files
** used to retrieve the respective implementations.
**
** Calling sqlite3Fts2SimpleTokenizerModule() sets the value pointed
** to by the argument to point a the "simple" tokenizer implementation.
** Function ...PorterTokenizerModule() sets *pModule to point to the
** porter tokenizer/stemmer implementation.
*/
void sqlite3Fts2SimpleTokenizerModule(sqlite3_tokenizer_module const**ppModule);
void sqlite3Fts2PorterTokenizerModule(sqlite3_tokenizer_module const**ppModule);
void sqlite3Fts2IcuTokenizerModule(sqlite3_tokenizer_module const**ppModule);

int sqlite3Fts2InitHashTable(sqlite3 *, fts2Hash *, const char *);

/*
** Initialise the fts2 extension. If this extension is built as part
** of the sqlite library, then this function is called directly by
** SQLite. If fts2 is built as a dynamically loadable extension, this
** function is called by the sqlite3_extension_init() entry point.
*/
int sqlite3Fts2Init(sqlite3 *db){
  int rc = SQLITE_OK;
  fts2Hash *pHash = 0;
  const sqlite3_tokenizer_module *pSimple = 0;
  const sqlite3_tokenizer_module *pPorter = 0;
  const sqlite3_tokenizer_module *pIcu = 0;

  sqlite3Fts2SimpleTokenizerModule(&pSimple);
  sqlite3Fts2PorterTokenizerModule(&pPorter);
#ifdef SQLITE_ENABLE_ICU
  sqlite3Fts2IcuTokenizerModule(&pIcu);
#endif

  /* Allocate and initialise the hash-table used to store tokenizers. */
  pHash = sqlite3_malloc(sizeof(fts2Hash));
  if( !pHash ){
    rc = SQLITE_NOMEM;
  }else{
    sqlite3Fts2HashInit(pHash, FTS2_HASH_STRING, 1);
  }

  /* Load the built-in tokenizers into the hash table */
  if( rc==SQLITE_OK ){
    if( sqlite3Fts2HashInsert(pHash, "simple", 7, (void *)pSimple)
     || sqlite3Fts2HashInsert(pHash, "porter", 7, (void *)pPorter) 
     || (pIcu && sqlite3Fts2HashInsert(pHash, "icu", 4, (void *)pIcu))
    ){
      rc = SQLITE_NOMEM;
    }
  }

  /* Create the virtual table wrapper around the hash-table and overload 
  ** the two scalar functions. If this is successful, register the
  ** module with sqlite.
  */
  if( SQLITE_OK==rc 
   && SQLITE_OK==(rc = sqlite3Fts2InitHashTable(db, pHash, "fts2_tokenizer"))
   && SQLITE_OK==(rc = sqlite3_overload_function(db, "snippet", -1))
   && SQLITE_OK==(rc = sqlite3_overload_function(db, "offsets", -1))
  ){
    return sqlite3_create_module_v2(
        db, "fts2", &fts2Module, (void *)pHash, hashDestroy
    );
  }

  /* An error has occured. Delete the hash table and return the error code. */
  assert( rc!=SQLITE_OK );
  if( pHash ){
    sqlite3Fts2HashClear(pHash);
    sqlite3_free(pHash);
  }
  return rc;
}

#if !SQLITE_CORE
int sqlite3_extension_init(
  sqlite3 *db, 
  char **pzErrMsg,
  const sqlite3_api_routines *pApi
){
  SQLITE_EXTENSION_INIT2(pApi)
  return sqlite3Fts2Init(db);
}
#endif

#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS2) */

/*











** This header file is used by programs that want to link against the
** FTS2 library.  All it does is declare the sqlite3Fts2Init() interface.
*/
#include "sqlite3.h"

#ifdef __cplusplus
extern "C" {

/*
** 2006 Oct 10
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This header file is used by programs that want to link against the
** FTS2 library.  All it does is declare the sqlite3Fts2Init() interface.
*/
#include "sqlite3.h"

#ifdef __cplusplus
extern "C" {

**    May you share freely, never taking more than you give.
**
*************************************************************************
** This is the implementation of generic hash-tables used in SQLite.
** We've modified it slightly to serve as a standalone hash table
** implementation for the full-text indexing module.
*/
#include <assert.h>
#include <stdlib.h>
#include <string.h>

/*
** The code in this file is only compiled if:
**
**     * The FTS2 module is being built as an extension
**       (in which case SQLITE_CORE is not defined), or
**
**     * The FTS2 module is being built into the core of
**       SQLite (in which case SQLITE_ENABLE_FTS2 is defined).
*/
#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS2)





#include "fts2_hash.h"

static void *malloc_and_zero(int n){
  void *p = malloc(n);
  if( p ){
    memset(p, 0, n);

**    May you share freely, never taking more than you give.
**
*************************************************************************
** This is the implementation of generic hash-tables used in SQLite.
** We've modified it slightly to serve as a standalone hash table
** implementation for the full-text indexing module.
*/




/*
** The code in this file is only compiled if:
**
**     * The FTS2 module is being built as an extension
**       (in which case SQLITE_CORE is not defined), or
**
**     * The FTS2 module is being built into the core of
**       SQLite (in which case SQLITE_ENABLE_FTS2 is defined).
*/
#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS2)

#include <assert.h>
#include <stdlib.h>
#include <string.h>

#include "fts2_hash.h"

static void *malloc_and_zero(int n){
  void *p = malloc(n);
  if( p ){
    memset(p, 0, n);

/*
** 2007 June 22
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This is part of an SQLite module implementing full-text search.
** This particular file implements the generic tokenizer interface.
*/

/*
** The code in this file is only compiled if:
**
**     * The FTS2 module is being built as an extension
**       (in which case SQLITE_CORE is not defined), or
**
**     * The FTS2 module is being built into the core of
**       SQLite (in which case SQLITE_ENABLE_FTS2 is defined).
*/
#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS2)


#include "sqlite3.h"
#include "sqlite3ext.h"
SQLITE_EXTENSION_INIT1

#include "fts2_hash.h"
#include "fts2_tokenizer.h"
#include <assert.h>

/*
** Implementation of the SQL scalar function for accessing the underlying 
** hash table. This function may be called as follows:
**
**   SELECT <function-name>(<key-name>);
**   SELECT <function-name>(<key-name>, <pointer>);
**
** where <function-name> is the name passed as the second argument
** to the sqlite3Fts2InitHashTable() function (e.g. 'fts2_tokenizer').
**
** If the <pointer> argument is specified, it must be a blob value
** containing a pointer to be stored as the hash data corresponding
** to the string <key-name>. If <pointer> is not specified, then
** the string <key-name> must already exist in the has table. Otherwise,
** an error is returned.
**
** Whether or not the <pointer> argument is specified, the value returned
** is a blob containing the pointer stored as the hash data corresponding
** to string <key-name> (after the hash-table is updated, if applicable).
*/
static void scalarFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  fts2Hash *pHash;
  void *pPtr = 0;
  const unsigned char *zName;
  int nName;

  assert( argc==1 || argc==2 );

  pHash = (fts2Hash *)sqlite3_user_data(context);

  zName = sqlite3_value_text(argv[0]);
  nName = sqlite3_value_bytes(argv[0])+1;

  if( argc==2 ){
    void *pOld;
    int n = sqlite3_value_bytes(argv[1]);
    if( n!=sizeof(pPtr) ){
      sqlite3_result_error(context, "argument type mismatch", -1);
      return;
    }
    pPtr = *(void **)sqlite3_value_blob(argv[1]);
    pOld = sqlite3Fts2HashInsert(pHash, (void *)zName, nName, pPtr);
    if( pOld==pPtr ){
      sqlite3_result_error(context, "out of memory", -1);
      return;
    }
  }else{
    pPtr = sqlite3Fts2HashFind(pHash, zName, nName);
    if( !pPtr ){
      char *zErr = sqlite3_mprintf("unknown tokenizer: %s", zName);
      sqlite3_result_error(context, zErr, -1);
      sqlite3_free(zErr);
      return;
    }
  }

  sqlite3_result_blob(context, (void *)&pPtr, sizeof(pPtr), SQLITE_TRANSIENT);
}

#ifdef SQLITE_TEST

#include <tcl.h>
#include <string.h>

/*
** Implementation of a special SQL scalar function for testing tokenizers 
** designed to be used in concert with the Tcl testing framework. This
** function must be called with two arguments:
**
**   SELECT <function-name>(<key-name>, <input-string>);
**   SELECT <function-name>(<key-name>, <pointer>);
**
** where <function-name> is the name passed as the second argument
** to the sqlite3Fts2InitHashTable() function (e.g. 'fts2_tokenizer')
** concatenated with the string '_test' (e.g. 'fts2_tokenizer_test').
**
** The return value is a string that may be interpreted as a Tcl
** list. For each token in the <input-string>, three elements are
** added to the returned list. The first is the token position, the 
** second is the token text (folded, stemmed, etc.) and the third is the
** substring of <input-string> associated with the token. For example, 
** using the built-in "simple" tokenizer:
**
**   SELECT fts_tokenizer_test('simple', 'I don't see how');
**
** will return the string:
**
**   "{0 i I 1 dont don't 2 see see 3 how how}"
**   
*/
static void testFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  fts2Hash *pHash;
  sqlite3_tokenizer_module *p;
  sqlite3_tokenizer *pTokenizer = 0;
  sqlite3_tokenizer_cursor *pCsr = 0;

  const char *zErr = 0;

  const char *zName;
  int nName;
  const char *zInput;
  int nInput;

  const char *zArg = 0;

  const char *zToken;
  int nToken;
  int iStart;
  int iEnd;
  int iPos;

  Tcl_Obj *pRet;

  assert( argc==2 || argc==3 );

  nName = sqlite3_value_bytes(argv[0]);
  zName = (const char *)sqlite3_value_text(argv[0]);
  nInput = sqlite3_value_bytes(argv[argc-1]);
  zInput = (const char *)sqlite3_value_text(argv[argc-1]);

  if( argc==3 ){
    zArg = (const char *)sqlite3_value_text(argv[1]);
  }

  pHash = (fts2Hash *)sqlite3_user_data(context);
  p = (sqlite3_tokenizer_module *)sqlite3Fts2HashFind(pHash, zName, nName+1);

  if( !p ){
    char *zErr = sqlite3_mprintf("unknown tokenizer: %s", zName);
    sqlite3_result_error(context, zErr, -1);
    sqlite3_free(zErr);
    return;
  }

  pRet = Tcl_NewObj();
  Tcl_IncrRefCount(pRet);

  if( SQLITE_OK!=p->xCreate(zArg ? 1 : 0, &zArg, &pTokenizer) ){
    zErr = "error in xCreate()";
    goto finish;
  }
  pTokenizer->pModule = p;
  if( SQLITE_OK!=p->xOpen(pTokenizer, zInput, nInput, &pCsr) ){
    zErr = "error in xOpen()";
    goto finish;
  }
  pCsr->pTokenizer = pTokenizer;

  while( SQLITE_OK==p->xNext(pCsr, &zToken, &nToken, &iStart, &iEnd, &iPos) ){
    Tcl_ListObjAppendElement(0, pRet, Tcl_NewIntObj(iPos));
    Tcl_ListObjAppendElement(0, pRet, Tcl_NewStringObj(zToken, nToken));
    zToken = &zInput[iStart];
    nToken = iEnd-iStart;
    Tcl_ListObjAppendElement(0, pRet, Tcl_NewStringObj(zToken, nToken));
  }

  if( SQLITE_OK!=p->xClose(pCsr) ){
    zErr = "error in xClose()";
    goto finish;
  }
  if( SQLITE_OK!=p->xDestroy(pTokenizer) ){
    zErr = "error in xDestroy()";
    goto finish;
  }

finish:
  if( zErr ){
    sqlite3_result_error(context, zErr, -1);
  }else{
    sqlite3_result_text(context, Tcl_GetString(pRet), -1, SQLITE_TRANSIENT);
  }
  Tcl_DecrRefCount(pRet);
}

static
int registerTokenizer(
  sqlite3 *db, 
  char *zName, 
  const sqlite3_tokenizer_module *p
){
  int rc;
  sqlite3_stmt *pStmt;
  const char zSql[] = "SELECT fts2_tokenizer(?, ?)";

  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
  if( rc!=SQLITE_OK ){
    return rc;
  }

  sqlite3_bind_text(pStmt, 1, zName, -1, SQLITE_STATIC);
  sqlite3_bind_blob(pStmt, 2, &p, sizeof(p), SQLITE_STATIC);
  sqlite3_step(pStmt);

  return sqlite3_finalize(pStmt);
}

static
int queryTokenizer(
  sqlite3 *db, 
  char *zName,  
  const sqlite3_tokenizer_module **pp
){
  int rc;
  sqlite3_stmt *pStmt;
  const char zSql[] = "SELECT fts2_tokenizer(?)";

  *pp = 0;
  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
  if( rc!=SQLITE_OK ){
    return rc;
  }

  sqlite3_bind_text(pStmt, 1, zName, -1, SQLITE_STATIC);
  if( SQLITE_ROW==sqlite3_step(pStmt) ){
    if( sqlite3_column_type(pStmt, 0)==SQLITE_BLOB ){
      memcpy(pp, sqlite3_column_blob(pStmt, 0), sizeof(*pp));
    }
  }

  return sqlite3_finalize(pStmt);
}

void sqlite3Fts2SimpleTokenizerModule(sqlite3_tokenizer_module const**ppModule);

/*
** Implementation of the scalar function fts2_tokenizer_internal_test().
** This function is used for testing only, it is not included in the
** build unless SQLITE_TEST is defined.
**
** The purpose of this is to test that the fts2_tokenizer() function
** can be used as designed by the C-code in the queryTokenizer and
** registerTokenizer() functions above. These two functions are repeated
** in the README.tokenizer file as an example, so it is important to
** test them.
**
** To run the tests, evaluate the fts2_tokenizer_internal_test() scalar
** function with no arguments. An assert() will fail if a problem is
** detected. i.e.:
**
**     SELECT fts2_tokenizer_internal_test();
**
*/
static void intTestFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  int rc;
  const sqlite3_tokenizer_module *p1;
  const sqlite3_tokenizer_module *p2;
  sqlite3 *db = (sqlite3 *)sqlite3_user_data(context);

  /* Test the query function */
  sqlite3Fts2SimpleTokenizerModule(&p1);
  rc = queryTokenizer(db, "simple", &p2);
  assert( rc==SQLITE_OK );
  assert( p1==p2 );
  rc = queryTokenizer(db, "nosuchtokenizer", &p2);
  assert( rc==SQLITE_ERROR );
  assert( p2==0 );
  assert( 0==strcmp(sqlite3_errmsg(db), "unknown tokenizer: nosuchtokenizer") );

  /* Test the storage function */
  rc = registerTokenizer(db, "nosuchtokenizer", p1);
  assert( rc==SQLITE_OK );
  rc = queryTokenizer(db, "nosuchtokenizer", &p2);
  assert( rc==SQLITE_OK );
  assert( p2==p1 );

  sqlite3_result_text(context, "ok", -1, SQLITE_STATIC);
}

#endif

/*
** Set up SQL objects in database db used to access the contents of
** the hash table pointed to by argument pHash. The hash table must
** been initialised to use string keys, and to take a private copy 
** of the key when a value is inserted. i.e. by a call similar to:
**
**    sqlite3Fts2HashInit(pHash, FTS2_HASH_STRING, 1);
**
** This function adds a scalar function (see header comment above
** scalarFunc() in this file for details) and, if ENABLE_TABLE is
** defined at compilation time, a temporary virtual table (see header 
** comment above struct HashTableVtab) to the database schema. Both 
** provide read/write access to the contents of *pHash.
**
** The third argument to this function, zName, is used as the name
** of both the scalar and, if created, the virtual table.
*/
int sqlite3Fts2InitHashTable(
  sqlite3 *db, 
  fts2Hash *pHash, 
  const char *zName
){
  int rc = SQLITE_OK;
  void *p = (void *)pHash;
  const int any = SQLITE_ANY;
  char *zTest = 0;
  char *zTest2 = 0;

#ifdef SQLITE_TEST
  void *pdb = (void *)db;
  zTest = sqlite3_mprintf("%s_test", zName);
  zTest2 = sqlite3_mprintf("%s_internal_test", zName);
  if( !zTest || !zTest2 ){
    rc = SQLITE_NOMEM;
  }
#endif

  if( rc!=SQLITE_OK
   || (rc = sqlite3_create_function(db, zName, 1, any, p, scalarFunc, 0, 0))
   || (rc = sqlite3_create_function(db, zName, 2, any, p, scalarFunc, 0, 0))
#ifdef SQLITE_TEST
   || (rc = sqlite3_create_function(db, zTest, 2, any, p, testFunc, 0, 0))
   || (rc = sqlite3_create_function(db, zTest, 3, any, p, testFunc, 0, 0))
   || (rc = sqlite3_create_function(db, zTest2, 0, any, pdb, intTestFunc, 0, 0))
#endif
  );

  sqlite3_free(zTest);
  sqlite3_free(zTest2);
  return rc;
}

#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS2) */

/* TODO(shess) Only used for SQLITE_OK and SQLITE_DONE at this time.
** If tokenizers are to be allowed to call sqlite3_*() functions, then
** we will need a way to register the API consistently.
*/
#include "sqlite3.h"

/*
** Structures used by the tokenizer interface.
















*/

typedef struct sqlite3_tokenizer sqlite3_tokenizer;
typedef struct sqlite3_tokenizer_cursor sqlite3_tokenizer_cursor;
typedef struct sqlite3_tokenizer_module sqlite3_tokenizer_module;

struct sqlite3_tokenizer_module {




  int iVersion;                  /* currently 0 */

  /*
  ** Create and destroy a tokenizer.  argc/argv are passed down from
  ** the fulltext virtual table creation to allow customization.















  */
  int (*xCreate)(int argc, const char *const*argv,


                 sqlite3_tokenizer **ppTokenizer);






  int (*xDestroy)(sqlite3_tokenizer *pTokenizer);

  /*
  ** Tokenize a particular input.  Call xOpen() to prepare to
  ** tokenize, xNext() repeatedly until it returns SQLITE_DONE, then
  ** xClose() to free any internal state.  The pInput passed to


  ** xOpen() must exist until the cursor is closed.  The ppToken



























  ** result from xNext() is only valid until the next call to xNext()
  ** or until xClose() is called.

  */
  /* TODO(shess) current implementation requires pInput to be
  ** nul-terminated.  This should either be fixed, or pInput/nBytes
  ** should be converted to zInput.
  */
  int (*xOpen)(sqlite3_tokenizer *pTokenizer,
               const char *pInput, int nBytes,
               sqlite3_tokenizer_cursor **ppCursor);
  int (*xClose)(sqlite3_tokenizer_cursor *pCursor);

  int (*xNext)(sqlite3_tokenizer_cursor *pCursor,
               const char **ppToken, int *pnBytes,
               int *piStartOffset, int *piEndOffset, int *piPosition);




};

struct sqlite3_tokenizer {
  const sqlite3_tokenizer_module *pModule;  /* The module for this tokenizer */
  /* Tokenizer implementations will typically add additional fields */
};

struct sqlite3_tokenizer_cursor {
  sqlite3_tokenizer *pTokenizer;       /* Tokenizer for this cursor. */
  /* Tokenizer implementations will typically add additional fields */
};

/*
** Get the module for a tokenizer which generates tokens based on a
** set of non-token characters.  The default is to break tokens at any
** non-alnum character, though the set of delimiters can also be
** specified by the first argv argument to xCreate().
*/
/* TODO(shess) This doesn't belong here.  Need some sort of
** registration process.
*/
void sqlite3Fts2SimpleTokenizerModule(sqlite3_tokenizer_module const**ppModule);
void sqlite3Fts2PorterTokenizerModule(sqlite3_tokenizer_module const**ppModule);

#endif /* _FTS2_TOKENIZER_H_ */

/* TODO(shess) Only used for SQLITE_OK and SQLITE_DONE at this time.
** If tokenizers are to be allowed to call sqlite3_*() functions, then
** we will need a way to register the API consistently.
*/
#include "sqlite3.h"

/*
** Structures used by the tokenizer interface. When a new tokenizer
** implementation is registered, the caller provides a pointer to
** an sqlite3_tokenizer_module containing pointers to the callback
** functions that make up an implementation.
**
** When an fts2 table is created, it passes any arguments passed to
** the tokenizer clause of the CREATE VIRTUAL TABLE statement to the
** sqlite3_tokenizer_module.xCreate() function of the requested tokenizer
** implementation. The xCreate() function in turn returns an 
** sqlite3_tokenizer structure representing the specific tokenizer to
** be used for the fts2 table (customized by the tokenizer clause arguments).
**
** To tokenize an input buffer, the sqlite3_tokenizer_module.xOpen()
** method is called. It returns an sqlite3_tokenizer_cursor object
** that may be used to tokenize a specific input buffer based on
** the tokenization rules supplied by a specific sqlite3_tokenizer
** object.
*/
typedef struct sqlite3_tokenizer_module sqlite3_tokenizer_module;
typedef struct sqlite3_tokenizer sqlite3_tokenizer;
typedef struct sqlite3_tokenizer_cursor sqlite3_tokenizer_cursor;


struct sqlite3_tokenizer_module {

  /*
  ** Structure version. Should always be set to 0.
  */
  int iVersion;

  /*


  ** Create a new tokenizer. The values in the argv[] array are the
  ** arguments passed to the "tokenizer" clause of the CREATE VIRTUAL
  ** TABLE statement that created the fts2 table. For example, if
  ** the following SQL is executed:
  **
  **   CREATE .. USING fts2( ... , tokenizer <tokenizer-name> arg1 arg2)
  **
  ** then argc is set to 2, and the argv[] array contains pointers
  ** to the strings "arg1" and "arg2".
  **
  ** This method should return either SQLITE_OK (0), or an SQLite error 
  ** code. If SQLITE_OK is returned, then *ppTokenizer should be set
  ** to point at the newly created tokenizer structure. The generic
  ** sqlite3_tokenizer.pModule variable should not be initialised by
  ** this callback. The caller will do so.
  */
  int (*xCreate)(
    int argc,                           /* Size of argv array */
    const char *const*argv,             /* Tokenizer argument strings */
    sqlite3_tokenizer **ppTokenizer     /* OUT: Created tokenizer */
  );

  /*
  ** Destroy an existing tokenizer. The fts2 module calls this method
  ** exactly once for each successful call to xCreate().
  */
  int (*xDestroy)(sqlite3_tokenizer *pTokenizer);

  /*



  ** Create a tokenizer cursor to tokenize an input buffer. The caller
  ** is responsible for ensuring that the input buffer remains valid
  ** until the cursor is closed (using the xClose() method). 
  */
  int (*xOpen)(
    sqlite3_tokenizer *pTokenizer,       /* Tokenizer object */
    const char *pInput, int nBytes,      /* Input buffer */
    sqlite3_tokenizer_cursor **ppCursor  /* OUT: Created tokenizer cursor */
  );

  /*
  ** Destroy an existing tokenizer cursor. The fts2 module calls this 
  ** method exactly once for each successful call to xOpen().
  */
  int (*xClose)(sqlite3_tokenizer_cursor *pCursor);

  /*
  ** Retrieve the next token from the tokenizer cursor pCursor. This
  ** method should either return SQLITE_OK and set the values of the
  ** "OUT" variables identified below, or SQLITE_DONE to indicate that
  ** the end of the buffer has been reached, or an SQLite error code.
  **
  ** *ppToken should be set to point at a buffer containing the 
  ** normalized version of the token (i.e. after any case-folding and/or
  ** stemming has been performed). *pnBytes should be set to the length
  ** of this buffer in bytes. The input text that generated the token is
  ** identified by the byte offsets returned in *piStartOffset and
  ** *piEndOffset.
  **
  ** The buffer *ppToken is set to point at is managed by the tokenizer
  ** implementation. It is only required to be valid until the next call

  ** to xNext() or xClose(). 
  */
  /* TODO(shess) current implementation requires pInput to be
  ** nul-terminated.  This should either be fixed, or pInput/nBytes
  ** should be converted to zInput.
  */




  int (*xNext)(
    sqlite3_tokenizer_cursor *pCursor,   /* Tokenizer cursor */
    const char **ppToken, int *pnBytes,  /* OUT: Normalized text for token */

    int *piStartOffset,  /* OUT: Byte offset of token in input buffer */
    int *piEndOffset,    /* OUT: Byte offset of end of token in input buffer */
    int *piPosition      /* OUT: Number of tokens returned before this one */
  );
};

struct sqlite3_tokenizer {
  const sqlite3_tokenizer_module *pModule;  /* The module for this tokenizer */
  /* Tokenizer implementations will typically add additional fields */
};

struct sqlite3_tokenizer_cursor {
  sqlite3_tokenizer *pTokenizer;       /* Tokenizer for this cursor. */
  /* Tokenizer implementations will typically add additional fields */
};













#endif /* _FTS2_TOKENIZER_H_ */

/*


** The author disclaims copyright to this source code.

**




*************************************************************************

** Implementation of the "simple" full-text-search tokenizer.
*/

/*
** The code in this file is only compiled if:
**
**     * The FTS2 module is being built as an extension

/*
** 2006 Oct 10
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** Implementation of the "simple" full-text-search tokenizer.
*/

/*
** The code in this file is only compiled if:
**
**     * The FTS2 module is being built as an extension

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#pragma data_seg()

typedef BOOL (WINAPI *DLLMAIN)(HANDLE, DWORD, LPVOID);
typedef struct EXTRA_STUFF
{
  DWORD dwNativeEntryPoint;
} EXTRA_STUFF, *LPEXTRA_STUFF;

/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.4.0.  By combining all the individual C code files into this 
** single large file, the entire code can be compiled as a one translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% are more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
** programs, you need this file and the "sqlite3.h" header file that defines
** the programming interface to the SQLite library.  (If you do not have 
** the "sqlite3.h" header file at hand, you will find a copy in the first
** 2679 lines past this header comment.)  Additional code files may be
** needed if you want a wrapper to interface SQLite with your choice of
** programming language.  The code for the "sqlite3" command-line shell
** is also in a separate file.  This file contains only code for the core
** SQLite library.
**
** This amalgamation was generated on 2007-06-18 17:44:42 UTC.
*/
#define SQLITE_AMALGAMATION 1






/************** Begin file sqlite3.h *****************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
................................................................................
** on how SQLite interfaces are suppose to operate.
**
** The name of this file under configuration management is "sqlite.h.in".
** The makefile makes some minor changes to this file (such as inserting
** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
**
** @(#) $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
#include <stdarg.h>     /* Needed for the definition of va_list */

/*
** Make sure we can call this stuff from C++.
................................................................................
** (X*1000000 + Y*1000 + Z). For example, for version "3.1.1beta", 
** SQLITE_VERSION_NUMBER is set to 3001001. To detect if they are using 
** version 3.1.1 or greater at compile time, programs may use the test 
** (SQLITE_VERSION_NUMBER>=3001001).
**
** See also: [sqlite3_libversion()] and [sqlite3_libversion_number()].
*/
#define SQLITE_VERSION         "3.4.0"
#define SQLITE_VERSION_NUMBER 3004000

/*
** CAPI3REF: Run-Time Library Version Numbers
**
** These routines return values equivalent to the header constants
** [SQLITE_VERSION] and [SQLITE_VERSION_NUMBER].  The values returned
** by this routines should only be different from the header values
................................................................................
** The sqlite3_version[] string constant contains the text of the
** [SQLITE_VERSION] string.  The sqlite3_libversion() function returns
** a poiner to the sqlite3_version[] string constant.  The function
** is provided for DLL users who can only access functions and not
** constants within the DLL.
*/
extern const char sqlite3_version[];
const char *sqlite3_libversion(void);
int sqlite3_libversion_number(void);

/*
** CAPI3REF: Database Connection Handle
**
** Each open SQLite database is represented by pointer to an instance of the
** opaque structure named "sqlite3".  It is useful to think of an sqlite3
................................................................................
** closed.
**
** All SQL statements prepared using [sqlite3_prepare_v2()] or
** [sqlite3_prepare16_v2()] must be destroyed using [sqlite3_finalize()]
** before this routine is called. Otherwise, SQLITE_BUSY is returned and the
** database connection remains open.
*/
int sqlite3_close(sqlite3 *);

/*
** The type for a callback function.
** This is legacy and deprecated.  It is included for historical
** compatibility and is not documented.
*/
typedef int (*sqlite3_callback)(void*,int,char**, char**);
................................................................................
** then no error message is ever written.
**
** The return value is is SQLITE_OK if there are no errors and
** some other [SQLITE_OK | return code] if there is an error.  
** The particular return value depends on the type of error. 
**
*/
int sqlite3_exec(
  sqlite3*,                                  /* An open database */
  const char *sql,                           /* SQL to be evaluted */
  int (*callback)(void*,int,char**,char**),  /* Callback function */
  void *,                                    /* 1st argument to callback */
  char **errmsg                              /* Error msg written here */
);

................................................................................
**
** If a callback invokes [sqlite3_exec()] or [sqlite3_step()] recursively,
** then the changes in the inner, recursive call are counted together
** with the changes in the outer call.
**
** SQLite implements the command "DELETE FROM table" without a WHERE clause
** by dropping and recreating the table.  (This is much faster than going
** through and deleting individual elements form the table.)  Because of
** this optimization, the change count for "DELETE FROM table" will be
** zero regardless of the number of elements that were originally in the
** table. To get an accurate count of the number of rows deleted, use
** "DELETE FROM table WHERE 1" instead.
*/
int sqlite3_changes(sqlite3*);

/*
** CAPI3REF: Total Number Of Rows Modified
***
** This function returns the number of database rows that have been
** modified by INSERT, UPDATE or DELETE statements since the database handle
** was opened. This includes UPDATE, INSERT and DELETE statements executed
................................................................................
** thread that is currently running the database operation.
**
** The SQL operation that is interrupted will return [SQLITE_INTERRUPT].
** If an interrupted operation was an update that is inside an
** explicit transaction, then the entire transaction will be rolled
** back automatically.
*/
void sqlite3_interrupt(sqlite3*);

/*
** CAPI3REF: Determine If An SQL Statement Is Complete
**
** These functions return true if the given input string comprises
** one or more complete SQL statements. For the sqlite3_complete() call,
** the parameter must be a nul-terminated UTF-8 string. For
................................................................................
** if additional input is needed before sending the statements into
** SQLite for parsing. The algorithm is simple.  If the 
** last token other than spaces and comments is a semicolon, then return 
** true.  Actually, the algorithm is a little more complicated than that
** in order to deal with triggers, but the basic idea is the same:  the
** statement is not complete unless it ends in a semicolon.
*/
int sqlite3_complete(const char *sql);
int sqlite3_complete16(const void *sql);

/*
** CAPI3REF: Register A Callback To Handle SQLITE_BUSY Errors
**
** This routine identifies a callback function that might be invoked
** whenever an attempt is made to open a database table 
** that another thread or process has locked.
................................................................................
**  sqlite3_exec(db, zSQL, 0, 0, 0);
**  sqlite3_free(zSQL);
** </pre></blockquote>
**
** The code above will render a correct SQL statement in the zSQL
** variable even if the zText variable is a NULL pointer.
*/
char *sqlite3_mprintf(const char*,...);
char *sqlite3_vmprintf(const char*, va_list);
char *sqlite3_snprintf(int,char*,const char*, ...);

/*
** CAPI3REF: Memory Allocation Functions
**
** SQLite uses its own memory allocator.  On some installations, this
** memory allocator is identical to the standard malloc()/realloc()/free()
** and can be used interchangable.  On others, the implementations are
** different.  For maximum portability, it is best not to mix calls
** to the standard malloc/realloc/free with the sqlite versions.
*/
void *sqlite3_malloc(int);
void *sqlite3_realloc(void*, int);
void sqlite3_free(void*);

/*
** CAPI3REF: Compile-Time Authorization Callbacks
***
** This routine registers a authorizer callback with the SQLite library.  
** The authorizer callback is invoked as SQL statements are being compiled
** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],
................................................................................
** The callback function registered by sqlite3_profile() is invoked
** as each SQL statement finishes and includes
** information on how long that statement ran.
**
** The sqlite3_profile() API is currently considered experimental and
** is subject to change.
*/
void *sqlite3_trace(sqlite3*, void(*xTrace)(void*,const char*), void*);
void *sqlite3_profile(sqlite3*,
   void(*xProfile)(void*,const char*,sqlite_uint64), void*);

/*
** CAPI3REF: Query Progress Callbacks
**
** This routine configures a callback function - the progress callback - that
** is invoked periodically during long running calls to [sqlite3_exec()],
................................................................................
** sqlite3_close() when it is no longer required.
**
** Note to windows users:  The encoding used for the filename argument
** of sqlite3_open() must be UTF-8, not whatever codepage is currently
** defined.  Filenames containing international characters must be converted
** to UTF-8 prior to passing them into sqlite3_open().
*/
int sqlite3_open(
  const char *filename,   /* Database filename (UTF-8) */
  sqlite3 **ppDb          /* OUT: SQLite db handle */
);
int sqlite3_open16(
  const void *filename,   /* Database filename (UTF-16) */
  sqlite3 **ppDb          /* OUT: SQLite db handle */
);

/*
** CAPI3REF: Error Codes And Messages
**
................................................................................
** an error code (examples: [sqlite3_data_count()] or [sqlite3_mprintf()]) do
** not change the error code returned by this routine.
**
** Assuming no other intervening sqlite3_* API calls are made, the error
** code returned by this function is associated with the same error as
** the strings returned by [sqlite3_errmsg()] and [sqlite3_errmsg16()].
*/
int sqlite3_errcode(sqlite3 *db);
const char *sqlite3_errmsg(sqlite3*);
const void *sqlite3_errmsg16(sqlite3*);

/*
** CAPI3REF: SQL Statement Object
**
** Instance of this object represent single SQL statements.  This
** is variously known as a "prepared statement" or a 
** "compiled SQL statement" or simply as a "statement".
................................................................................
** program using one of these routines. 
**
** The first argument "db" is an [sqlite3 | SQLite database handle] 
** obtained from a prior call to [sqlite3_open()] or [sqlite3_open16()].
** The second argument "zSql" is the statement to be compiled, encoded
** as either UTF-8 or UTF-16.  The sqlite3_prepare() and sqlite3_prepare_v2()
** interfaces uses UTF-8 and sqlite3_prepare16() and sqlite3_prepare16_v2()
** use UTF-16. If the next argument, "nBytes", is less


** than zero, then zSql is read up to the first zero terminator.  If
** "nBytes" is not less than zero, then it is the length of the string zSql
** in bytes (not characters).




**
** *pzTail is made to point to the first byte past the end of the first
** SQL statement in zSql.  This routine only compiles the first statement
** in zSql, so *pzTail is left pointing to what remains uncompiled.
**
** *ppStmt is left pointing to a compiled 
** [sqlite3_stmt | SQL statement structure] that can be
................................................................................
** [SQLITE_ERROR] result code and you would have to make a second call to
** [sqlite3_reset()] in order to find the underlying cause of the problem.
** With the "v2" prepare interfaces, the underlying reason for the error is
** returned immediately.
** </li>
** </ol>
*/
int sqlite3_prepare(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nBytes,             /* Length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
int sqlite3_prepare_v2(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nBytes,             /* Length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
int sqlite3_prepare16(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nBytes,             /* Length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);
int sqlite3_prepare16_v2(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nBytes,             /* Length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);

/*
** CAPI3REF:  Dynamically Typed Value Object
**
................................................................................

/*
** CAPI3REF: Source Of Data In A Query Result
**
** These routines provide a means to determine what column of what
** table in which database a result of a SELECT statement comes from.
** The name of the database or table or column can be returned as



** either a UTF8 or UTF16 string.  The returned string is valid until
** the [sqlite3_stmt | prepared statement] is destroyed using
** [sqlite3_finalize()] or until the same information is requested
** again about the same column.




**
** The first argument to the following calls is a 
** [sqlite3_stmt | compiled SQL statement].
** These functions return information about the Nth column returned by 
** the statement, where N is the second function argument.
**
** If the Nth column returned by the statement is an expression
................................................................................
** We admit that this is a goofy design.  The problem has been fixed
** with the "v2" interface.  If you prepare all of your SQL statements
** using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] instead
** of the legacy [sqlite3_prepare()] and [sqlite3_prepare16()], then the 
** more specific [SQLITE_ERROR | result codes] are returned directly
** by sqlite3_step().  The use of the "v2" interface is recommended.
*/
int sqlite3_step(sqlite3_stmt*);

/*
** CAPI3REF:
**
** Return the number of values in the current row of the result set.
**
** After a call to [sqlite3_step()] that returns [SQLITE_ROW], this routine
................................................................................
** [SQLITE_FLOAT], [SQLITE_TEXT], [SQLITE_BLOB], or [SQLITE_NULL].  The value
** returned by sqlite3_column_type() is only meaningful if no type
** conversions have occurred as described below.  After a type conversion,
** the value returned by sqlite3_column_type() is undefined.  Future
** versions of SQLite may change the behavior of sqlite3_column_type()
** following a type conversion.
**
*** The sqlite3_column_nm
**
** If the result is a BLOB or UTF-8 string then the sqlite3_column_bytes() 
** routine returns the number of bytes in that BLOB or string.
** If the result is a UTF-16 string, then sqlite3_column_bytes() converts
** the string to UTF-8 and then returns the number of bytes.
** If the result is a numeric value then sqlite3_column_bytes() uses
** [sqlite3_snprintf()] to convert that value to a UTF-8 string and returns
** the number of bytes in that string.
................................................................................
** [sqlite3_stmt | virtual machine].  If the virtual machine has not 
** completed execution when this routine is called, that is like
** encountering an error or an interrupt.  (See [sqlite3_interrupt()].) 
** Incomplete updates may be rolled back and transactions cancelled,  
** depending on the circumstances, and the 
** [SQLITE_ERROR | result code] returned will be [SQLITE_ABORT].
*/
int sqlite3_finalize(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Reset A Prepared Statement Object
**
** The sqlite3_reset() function is called to reset a 
** [sqlite_stmt | compiled SQL statement] object.
** back to it's initial state, ready to be re-executed.
** Any SQL statement variables that had values bound to them using
** the [sqlite3_bind_blob | sqlite3_bind_*() API] retain their values.
** Use [sqlite3_clear_bindings()] to reset the bindings.
*/
int sqlite3_reset(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Create Or Redefine SQL Functions
**
** The following two functions are used to add SQL functions or aggregates
** or to redefine the behavior of existing SQL functions or aggregates.  The
** difference only between the two is that the second parameter, the
................................................................................
** These functions are all now obsolete.  In order to maintain
** backwards compatibility with older code, we continue to support
** these functions.  However, new development projects should avoid
** the use of these functions.  To help encourage people to avoid
** using these functions, we are not going to tell you want they do.
*/
int sqlite3_aggregate_count(sqlite3_context*);
int sqlite3_expired(sqlite3_stmt*);
int sqlite3_transfer_bindings(sqlite3_stmt*, sqlite3_stmt*);
int sqlite3_global_recover(void);


/*
** CAPI3REF: Obtaining SQL Function Parameter Values
**
................................................................................
/*
** Specify the key for an encrypted database.  This routine should be
** called right after sqlite3_open().
**
** The code to implement this API is not available in the public release
** of SQLite.
*/
int sqlite3_key(
  sqlite3 *db,                   /* Database to be rekeyed */
  const void *pKey, int nKey     /* The key */
);

/*
** Change the key on an open database.  If the current database is not
** encrypted, this routine will encrypt it.  If pNew==0 or nNew==0, the
** database is decrypted.
**
** The code to implement this API is not available in the public release
** of SQLite.
*/
int sqlite3_rekey(
  sqlite3 *db,                   /* Database to be rekeyed */
  const void *pKey, int nKey     /* The new key */
);

/*
** CAPI3REF:  Suspend Execution For A Short Time
**
** This function causes the current thread to suspect execution
** a number of milliseconds specified in its parameter.
**
** If the operating system does not support sleep requests with 
** millisecond time resolution, then the time will be rounded up to 
** the nearest second. The number of milliseconds of sleep actually 
** requested from the operating system is returned.
*/
int sqlite3_sleep(int);

/*
** CAPI3REF:  Name Of The Folder Holding Temporary Files
**
** If this global variable is made to point to a string which is
** the name of a folder (a.ka. directory), then all temporary files
** created by SQLite will be placed in that directory.  If this variable
................................................................................
  int (*xBegin)(sqlite3_vtab *pVTab);
  int (*xSync)(sqlite3_vtab *pVTab);
  int (*xCommit)(sqlite3_vtab *pVTab);
  int (*xRollback)(sqlite3_vtab *pVTab);
  int (*xFindFunction)(sqlite3_vtab *pVtab, int nArg, const char *zName,
                       void (**pxFunc)(sqlite3_context*,int,sqlite3_value**),
                       void **ppArg);


};

/*
** The sqlite3_index_info structure and its substructures is used to
** pass information into and receive the reply from the xBestIndex
** method of an sqlite3_module.  The fields under **Inputs** are the
** inputs to xBestIndex and are read-only.  xBestIndex inserts its
................................................................................
*/
int sqlite3_create_module(
  sqlite3 *db,               /* SQLite connection to register module with */
  const char *zName,         /* Name of the module */
  const sqlite3_module *,    /* Methods for the module */
  void *                     /* Client data for xCreate/xConnect */
);














/*
** Every module implementation uses a subclass of the following structure
** to describe a particular instance of the module.  Each subclass will
** be taylored to the specific needs of the module implementation.   The
** purpose of this superclass is to define certain fields that are common
** to all module implementations.
................................................................................
** This file contains the C functions that implement date and time
** functions for SQLite.  
**
** There is only one exported symbol in this file - the function
** sqlite3RegisterDateTimeFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
**
** SQLite processes all times and dates as Julian Day numbers.  The
** dates and times are stored as the number of days since noon
** in Greenwich on November 24, 4714 B.C. according to the Gregorian
** calendar system. 
**
** 1970-01-01 00:00:00 is JD 2440587.5
................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
/************** Include limits.h in the middle of sqliteInt.h ****************/
/************** Begin file limits.h ******************************************/
/*
** 2007 May 7
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** 
** This file defines various limits of what SQLite can process.
**
** @(#) $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** The maximum length of a TEXT or BLOB in bytes.   This also
** limits the size of a row in a table or index.
**
** The hard limit is the ability of a 32-bit signed integer
................................................................................
** Maximum length (in bytes) of the pattern in a LIKE or GLOB
** operator.
*/
#ifndef SQLITE_MAX_LIKE_PATTERN_LENGTH
# define SQLITE_MAX_LIKE_PATTERN_LENGTH 50000
#endif

/************** End of limits.h **********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/


#if defined(SQLITE_TCL) || defined(TCLSH)
# include <tcl.h>
#endif

................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This is the header file for the generic hash-table implemenation
** used in SQLite.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
#ifndef _SQLITE_HASH_H_
#define _SQLITE_HASH_H_

/* Forward declarations of structures. */
typedef struct Hash Hash;
typedef struct HashElem HashElem;
................................................................................
/* #define SQLITE_HASH_POINTER   2 // NOT USED */
#define SQLITE_HASH_STRING    3
#define SQLITE_HASH_BINARY    4

/*
** Access routines.  To delete, insert a NULL pointer.
*/
static void sqlite3HashInit(Hash*, int keytype, int copyKey);
static void *sqlite3HashInsert(Hash*, const void *pKey, int nKey, void *pData);
static void *sqlite3HashFind(const Hash*, const void *pKey, int nKey);
static void sqlite3HashClear(Hash*);

/*
** Macros for looping over all elements of a hash table.  The idiom is
** like this:
**
**   Hash h;
**   HashElem *p;
................................................................................
/************** Continuing where we left off in sqliteInt.h ******************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <stddef.h>

#if defined(_WIN32) || defined(WIN32) || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__BORLANDC__)
# define isnan(X)  ((X)!=(X))
#endif

/*
** If compiling for a processor that lacks floating point support,
** substitute integer for floating-point
*/
#ifdef SQLITE_OMIT_FLOATING_POINT
# define double sqlite_int64
................................................................................
*************************************************************************
** Header file for the Virtual DataBase Engine (VDBE)
**
** This header defines the interface to the virtual database engine
** or VDBE.  The VDBE implements an abstract machine that runs a
** simple program to access and modify the underlying database.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
#ifndef _SQLITE_VDBE_H_
#define _SQLITE_VDBE_H_

/*
** A single VDBE is an opaque structure named "Vdbe".  Only routines
** in the source file sqliteVdbe.c are allowed to see the insides
................................................................................
#define OP_Remainder                           82   /* same as TK_REM      */
#define OP_NewRowid                            23
#define OP_Multiply                            80   /* same as TK_STAR     */
#define OP_IfMemNeg                            24
#define OP_Variable                            25
#define OP_String                              26
#define OP_RealAffinity                        27

#define OP_ParseSchema                         28
#define OP_VOpen                               29
#define OP_Close                               30
#define OP_CreateIndex                         31
#define OP_IsUnique                            32
#define OP_NotFound                            33
#define OP_Int64                               34
#define OP_MustBeInt                           35
#define OP_Halt                                36
#define OP_Rowid                               37
#define OP_IdxLT                               38
#define OP_AddImm                              39
#define OP_Statement                           40
#define OP_RowData                             41
#define OP_MemMax                              42
#define OP_Push                                43
#define OP_Or                                  60   /* same as TK_OR       */
#define OP_NotExists                           44
#define OP_MemIncr                             45
#define OP_Gosub                               46
#define OP_Divide                              81   /* same as TK_SLASH    */
#define OP_Integer                             47
#define OP_ToNumeric                          140   /* same as TK_TO_NUMERIC*/
#define OP_MemInt                              48
#define OP_Prev                                49
#define OP_Concat                              83   /* same as TK_CONCAT   */
#define OP_BitAnd                              74   /* same as TK_BITAND   */
#define OP_VColumn                             50
#define OP_CreateTable                         51
#define OP_Last                                52
#define OP_IsNull                              65   /* same as TK_ISNULL   */
#define OP_IncrVacuum                          53
#define OP_IdxRowid                            54
#define OP_MakeIdxRec                          55
#define OP_ShiftRight                          77   /* same as TK_RSHIFT   */
#define OP_ResetCount                          56
#define OP_FifoWrite                           57
#define OP_Callback                            58
#define OP_ContextPush                         59
#define OP_DropTrigger                         62
#define OP_DropIndex                           63
#define OP_IdxGE                               64
#define OP_IdxDelete                           73
#define OP_Vacuum                              84
#define OP_MoveLe                              86
#define OP_IfNot                               89
#define OP_DropTable                           90
#define OP_MakeRecord                          91
#define OP_ToBlob                             139   /* same as TK_TO_BLOB  */
#define OP_Delete                              92
#define OP_AggFinal                            93
#define OP_ShiftLeft                           76   /* same as TK_LSHIFT   */
#define OP_Dup                                 94
#define OP_Goto                                95
#define OP_TableLock                           96
#define OP_FifoRead                            97
#define OP_Clear                               98
#define OP_IdxGT                               99
#define OP_MoveLt                             100
#define OP_Le                                  70   /* same as TK_LE       */
#define OP_VerifyCookie                       101
#define OP_AggStep                            102
#define OP_Pull                               103
#define OP_ToText                             138   /* same as TK_TO_TEXT  */
#define OP_Not                                 16   /* same as TK_NOT      */
#define OP_ToReal                             142   /* same as TK_TO_REAL  */
#define OP_SetNumColumns                      104
#define OP_AbsValue                           105
#define OP_Transaction                        106
#define OP_VFilter                            107
#define OP_Negative                            85   /* same as TK_UMINUS   */
#define OP_Ne                                  67   /* same as TK_NE       */
#define OP_VDestroy                           108
#define OP_ContextPop                         109
#define OP_BitOr                               75   /* same as TK_BITOR    */
#define OP_Next                               110
#define OP_IdxInsert                          111
#define OP_Distinct                           112
#define OP_Lt                                  71   /* same as TK_LT       */
#define OP_Insert                             113
#define OP_Destroy                            114
#define OP_ReadCookie                         115
#define OP_ForceInt                           116
#define OP_LoadAnalysis                       117
#define OP_Explain                            118
#define OP_IfMemZero                          119
#define OP_OpenPseudo                         120
#define OP_OpenEphemeral                      121
#define OP_Null                               122
#define OP_Blob                               123
#define OP_Add                                 78   /* same as TK_PLUS     */
#define OP_MemStore                           124
#define OP_Rewind                             127
#define OP_MoveGe                             128
#define OP_VBegin                             129
#define OP_VUpdate                            130
#define OP_BitNot                              87   /* same as TK_BITNOT   */
#define OP_VCreate                            131
#define OP_MemMove                            132
#define OP_MemNull                            133
#define OP_Found                              134
#define OP_NullRow                            135

/* The following opcode values are never used */
#define OP_NotUsed_136                        136
#define OP_NotUsed_137                        137

/* Opcodes that are guaranteed to never push a value onto the stack
** contain a 1 their corresponding position of the following mask
** set.  See the opcodeNoPush() function in vdbeaux.c  */
#define NOPUSH_MASK_0 0xeeb4
#define NOPUSH_MASK_1 0x796b
#define NOPUSH_MASK_2 0x7ddb
#define NOPUSH_MASK_3 0xff32
#define NOPUSH_MASK_4 0xffff
#define NOPUSH_MASK_5 0xb6f7
#define NOPUSH_MASK_6 0xfdfd
#define NOPUSH_MASK_7 0x93b3
#define NOPUSH_MASK_8 0x7ccf
#define NOPUSH_MASK_9 0x0000

/************** End of opcodes.h *********************************************/
/************** Continuing where we left off in vdbe.h ***********************/

/*
** Prototypes for the VDBE interface.  See comments on the implementation
** for a description of what each of these routines does.
*/
static Vdbe *sqlite3VdbeCreate(sqlite3*);
static int sqlite3VdbeAddOp(Vdbe*,int,int,int);
static int sqlite3VdbeOp3(Vdbe*,int,int,int,const char *zP3,int);
static int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp);
static void sqlite3VdbeChangeP1(Vdbe*, int addr, int P1);
static void sqlite3VdbeChangeP2(Vdbe*, int addr, int P2);
static void sqlite3VdbeJumpHere(Vdbe*, int addr);
static void sqlite3VdbeChangeToNoop(Vdbe*, int addr, int N);
static void sqlite3VdbeChangeP3(Vdbe*, int addr, const char *zP1, int N);
static VdbeOp *sqlite3VdbeGetOp(Vdbe*, int);
static int sqlite3VdbeMakeLabel(Vdbe*);
static void sqlite3VdbeDelete(Vdbe*);
static void sqlite3VdbeMakeReady(Vdbe*,int,int,int,int);
static int sqlite3VdbeFinalize(Vdbe*);
static void sqlite3VdbeResolveLabel(Vdbe*, int);
static int sqlite3VdbeCurrentAddr(Vdbe*);
#ifdef SQLITE_DEBUG
static   void sqlite3VdbeTrace(Vdbe*,FILE*);
#endif
static void sqlite3VdbeResetStepResult(Vdbe*);
static int sqlite3VdbeReset(Vdbe*);
static void sqlite3VdbeSetNumCols(Vdbe*,int);
static int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, int);
static void sqlite3VdbeCountChanges(Vdbe*);
static sqlite3 *sqlite3VdbeDb(Vdbe*);
static void sqlite3VdbeSetSql(Vdbe*, const char *z, int n);
static const char *sqlite3VdbeGetSql(Vdbe*);
static void sqlite3VdbeSwap(Vdbe*,Vdbe*);

#ifndef NDEBUG
static   void sqlite3VdbeComment(Vdbe*, const char*, ...);
# define VdbeComment(X)  sqlite3VdbeComment X
#else
# define VdbeComment(X)
#endif

#endif

................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite B-Tree file
** subsystem.  See comments in the source code for a detailed description
** of what each interface routine does.
**
** @(#) $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
#ifndef _BTREE_H_
#define _BTREE_H_

/* TODO: This definition is just included so other modules compile. It
** needs to be revisited.
*/
................................................................................
** Forward declarations of structure
*/
typedef struct Btree Btree;
typedef struct BtCursor BtCursor;
typedef struct BtShared BtShared;


static int sqlite3BtreeOpen(
  const char *zFilename,   /* Name of database file to open */
  sqlite3 *db,             /* Associated database connection */
  Btree **,                /* Return open Btree* here */
  int flags                /* Flags */
);

/* The flags parameter to sqlite3BtreeOpen can be the bitwise or of the
................................................................................
** NOTE:  These values must match the corresponding PAGER_ values in
** pager.h.
*/
#define BTREE_OMIT_JOURNAL  1  /* Do not use journal.  No argument */
#define BTREE_NO_READLOCK   2  /* Omit readlocks on readonly files */
#define BTREE_MEMORY        4  /* In-memory DB.  No argument */

static int sqlite3BtreeClose(Btree*);
static int sqlite3BtreeSetBusyHandler(Btree*,BusyHandler*);
static int sqlite3BtreeSetCacheSize(Btree*,int);
static int sqlite3BtreeSetSafetyLevel(Btree*,int,int);
static int sqlite3BtreeSyncDisabled(Btree*);
static int sqlite3BtreeSetPageSize(Btree*,int,int);
static int sqlite3BtreeGetPageSize(Btree*);
static int sqlite3BtreeMaxPageCount(Btree*,int);
static int sqlite3BtreeGetReserve(Btree*);
static int sqlite3BtreeSetAutoVacuum(Btree *, int);
static int sqlite3BtreeGetAutoVacuum(Btree *);
static int sqlite3BtreeBeginTrans(Btree*,int);
static int sqlite3BtreeCommitPhaseOne(Btree*, const char *zMaster);
static int sqlite3BtreeCommitPhaseTwo(Btree*);
static int sqlite3BtreeCommit(Btree*);
static int sqlite3BtreeRollback(Btree*);
static int sqlite3BtreeBeginStmt(Btree*);
static int sqlite3BtreeCommitStmt(Btree*);
static int sqlite3BtreeRollbackStmt(Btree*);
static int sqlite3BtreeCreateTable(Btree*, int*, int flags);
static int sqlite3BtreeIsInTrans(Btree*);
static int sqlite3BtreeIsInStmt(Btree*);
static int sqlite3BtreeIsInReadTrans(Btree*);
static void *sqlite3BtreeSchema(Btree *, int, void(*)(void *));
static int sqlite3BtreeSchemaLocked(Btree *);
static int sqlite3BtreeLockTable(Btree *, int, u8);

static const char *sqlite3BtreeGetFilename(Btree *);
static const char *sqlite3BtreeGetDirname(Btree *);
static const char *sqlite3BtreeGetJournalname(Btree *);
static int sqlite3BtreeCopyFile(Btree *, Btree *);

static int sqlite3BtreeIncrVacuum(Btree *);

/* The flags parameter to sqlite3BtreeCreateTable can be the bitwise OR
** of the following flags:
*/
#define BTREE_INTKEY     1    /* Table has only 64-bit signed integer keys */
#define BTREE_ZERODATA   2    /* Table has keys only - no data */
#define BTREE_LEAFDATA   4    /* Data stored in leaves only.  Implies INTKEY */

static int sqlite3BtreeDropTable(Btree*, int, int*);
static int sqlite3BtreeClearTable(Btree*, int);
static int sqlite3BtreeGetMeta(Btree*, int idx, u32 *pValue);
static int sqlite3BtreeUpdateMeta(Btree*, int idx, u32 value);

static int sqlite3BtreeCursor(
  Btree*,                              /* BTree containing table to open */
  int iTable,                          /* Index of root page */
  int wrFlag,                          /* 1 for writing.  0 for read-only */
  int(*)(void*,int,const void*,int,const void*),  /* Key comparison function */
  void*,                               /* First argument to compare function */
  BtCursor **ppCursor                  /* Returned cursor */
);

static int sqlite3BtreeCloseCursor(BtCursor*);
static int sqlite3BtreeMoveto(BtCursor*,const void *pKey,i64 nKey,int bias,int *pRes);
static int sqlite3BtreeDelete(BtCursor*);
static int sqlite3BtreeInsert(BtCursor*, const void *pKey, i64 nKey,
                                  const void *pData, int nData,
                                  int nZero, int bias);
static int sqlite3BtreeFirst(BtCursor*, int *pRes);
static int sqlite3BtreeLast(BtCursor*, int *pRes);
static int sqlite3BtreeNext(BtCursor*, int *pRes);
static int sqlite3BtreeEof(BtCursor*);
static int sqlite3BtreeFlags(BtCursor*);
static int sqlite3BtreePrevious(BtCursor*, int *pRes);
static int sqlite3BtreeKeySize(BtCursor*, i64 *pSize);
static int sqlite3BtreeKey(BtCursor*, u32 offset, u32 amt, void*);
static const void *sqlite3BtreeKeyFetch(BtCursor*, int *pAmt);
static const void *sqlite3BtreeDataFetch(BtCursor*, int *pAmt);
static int sqlite3BtreeDataSize(BtCursor*, u32 *pSize);
static int sqlite3BtreeData(BtCursor*, u32 offset, u32 amt, void*);

static char *sqlite3BtreeIntegrityCheck(Btree*, int *aRoot, int nRoot, int, int*);
static struct Pager *sqlite3BtreePager(Btree*);

static int sqlite3BtreePutData(BtCursor*, u32 offset, u32 amt, void*);
static void sqlite3BtreeCacheOverflow(BtCursor *);

#ifdef SQLITE_TEST
static int sqlite3BtreeCursorInfo(BtCursor*, int*, int);
static void sqlite3BtreeCursorList(Btree*);
static int sqlite3BtreePageDump(Btree*, int, int recursive);
#endif

#endif /* _BTREE_H_ */

/************** End of btree.h ***********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
/************** Include pager.h in the middle of sqliteInt.h *****************/
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite page cache
** subsystem.  The page cache subsystem reads and writes a file a page
** at a time and provides a journal for rollback.
**
** @(#) $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

#ifndef _PAGER_H_
#define _PAGER_H_

/*
** The type used to represent a page number.  The first page in a file
................................................................................
#define PAGER_LOCKINGMODE_NORMAL      0
#define PAGER_LOCKINGMODE_EXCLUSIVE   1

/*
** See source code comments for a detailed description of the following
** routines:
*/
static int sqlite3PagerOpen(Pager **ppPager, const char *zFilename,
                     int nExtra, int flags);
static void sqlite3PagerSetBusyhandler(Pager*, BusyHandler *pBusyHandler);
static void sqlite3PagerSetDestructor(Pager*, void(*)(DbPage*,int));
static void sqlite3PagerSetReiniter(Pager*, void(*)(DbPage*,int));
static int sqlite3PagerSetPagesize(Pager*, int);
static int sqlite3PagerMaxPageCount(Pager*, int);
static int sqlite3PagerReadFileheader(Pager*, int, unsigned char*);
static void sqlite3PagerSetCachesize(Pager*, int);
static int sqlite3PagerClose(Pager *pPager);
static int sqlite3PagerAcquire(Pager *pPager, Pgno pgno, DbPage **ppPage, int clrFlag);
#define sqlite3PagerGet(A,B,C) sqlite3PagerAcquire(A,B,C,0)
static DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno);
static int sqlite3PagerRef(DbPage*);
static int sqlite3PagerUnref(DbPage*);
static int sqlite3PagerWrite(DbPage*);
static int sqlite3PagerOverwrite(Pager *pPager, Pgno pgno, void*);
static int sqlite3PagerPagecount(Pager*);
static int sqlite3PagerTruncate(Pager*,Pgno);
static int sqlite3PagerBegin(DbPage*, int exFlag);
static int sqlite3PagerCommitPhaseOne(Pager*,const char *zMaster, Pgno);
static int sqlite3PagerCommitPhaseTwo(Pager*);
static int sqlite3PagerRollback(Pager*);
static int sqlite3PagerIsreadonly(Pager*);
static int sqlite3PagerStmtBegin(Pager*);
static int sqlite3PagerStmtCommit(Pager*);
static int sqlite3PagerStmtRollback(Pager*);
static void sqlite3PagerDontRollback(DbPage*);
static void sqlite3PagerDontWrite(DbPage*);
static int sqlite3PagerRefcount(Pager*);
static void sqlite3PagerSetSafetyLevel(Pager*,int,int);
static const char *sqlite3PagerFilename(Pager*);
static const char *sqlite3PagerDirname(Pager*);
static const char *sqlite3PagerJournalname(Pager*);
static int sqlite3PagerNosync(Pager*);
static int sqlite3PagerMovepage(Pager*,DbPage*,Pgno);
static void *sqlite3PagerGetData(DbPage *); 
static void *sqlite3PagerGetExtra(DbPage *); 
static int sqlite3PagerLockingMode(Pager *, int);

#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) && !defined(SQLITE_OMIT_DISKIO)
static   int sqlite3PagerReleaseMemory(int);
#endif

#ifdef SQLITE_HAS_CODEC
static   void sqlite3PagerSetCodec(Pager*,void*(*)(void*,void*,Pgno,int),void*);
#endif

#if !defined(NDEBUG) || defined(SQLITE_TEST)
static   Pgno sqlite3PagerPagenumber(DbPage*);
static   int sqlite3PagerIswriteable(DbPage*);
#endif

#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
static   int sqlite3PagerLockstate(Pager*);
#endif

#ifdef SQLITE_TEST
static   int *sqlite3PagerStats(Pager*);
static   void sqlite3PagerRefdump(Pager*);
  int pager3_refinfo_enable;
#endif

#ifdef SQLITE_TEST
void disable_simulated_io_errors(void);
void enable_simulated_io_errors(void);
#else
................................................................................
#if !defined(OS_UNIX) && !defined(OS_OTHER)
# define OS_OTHER 0
# ifndef OS_WIN
#   if defined(_WIN32) || defined(WIN32) || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__BORLANDC__)
#     define OS_WIN 1
#     define OS_UNIX 0
#     define OS_OS2 0
#   elif defined(_EMX_) || defined(_OS2) || defined(OS2) || defined(_OS2_) || defined(__OS2__)
#     define OS_WIN 0
#     define OS_UNIX 0
#     define OS_OS2 1
#   else
#     define OS_WIN 0
#     define OS_UNIX 1
#     define OS_OS2 0
................................................................................
/*
** Define the maximum size of a temporary filename
*/
#if OS_WIN
# include <windows.h>
# define SQLITE_TEMPNAME_SIZE (MAX_PATH+50)
#elif OS_OS2



# define INCL_DOSDATETIME
# define INCL_DOSFILEMGR
# define INCL_DOSERRORS
# define INCL_DOSMISC
# define INCL_DOSPROCESS

# include <os2.h>
# define SQLITE_TEMPNAME_SIZE (CCHMAXPATHCOMP)
#else
# define SQLITE_TEMPNAME_SIZE 200
#endif

/* If the SET_FULLSYNC macro is not defined above, then make it
................................................................................
#define RESERVED_BYTE     (PENDING_BYTE+1)
#define SHARED_FIRST      (PENDING_BYTE+2)
#define SHARED_SIZE       510

/*
** Prototypes for operating system interface routines.
*/
static int sqlite3OsClose(OsFile**);
static int sqlite3OsOpenDirectory(OsFile*, const char*);
static int sqlite3OsRead(OsFile*, void*, int amt);
static int sqlite3OsWrite(OsFile*, const void*, int amt);
static int sqlite3OsSeek(OsFile*, i64 offset);
static int sqlite3OsTruncate(OsFile*, i64 size);
static int sqlite3OsSync(OsFile*, int);
static void sqlite3OsSetFullSync(OsFile *id, int setting);
static int sqlite3OsFileSize(OsFile*, i64 *pSize);
static int sqlite3OsLock(OsFile*, int);
static int sqlite3OsUnlock(OsFile*, int);
static int sqlite3OsCheckReservedLock(OsFile *id);
static int sqlite3OsOpenReadWrite(const char*, OsFile**, int*);
static int sqlite3OsOpenExclusive(const char*, OsFile**, int);
static int sqlite3OsOpenReadOnly(const char*, OsFile**);
static int sqlite3OsDelete(const char*);
static int sqlite3OsFileExists(const char*);
static char *sqlite3OsFullPathname(const char*);
static int sqlite3OsIsDirWritable(char*);
static int sqlite3OsSyncDirectory(const char*);
static int sqlite3OsSectorSize(OsFile *id);
static int sqlite3OsTempFileName(char*);
static int sqlite3OsRandomSeed(char*);
static int sqlite3OsSleep(int ms);
static int sqlite3OsCurrentTime(double*);
static void sqlite3OsEnterMutex(void);
static void sqlite3OsLeaveMutex(void);
static int sqlite3OsInMutex(int);
static ThreadData *sqlite3OsThreadSpecificData(int);
static void *sqlite3OsMalloc(int);
static void *sqlite3OsRealloc(void *, int);
static void sqlite3OsFree(void *);
static int sqlite3OsAllocationSize(void *);
static void *sqlite3OsDlopen(const char*);
static void *sqlite3OsDlsym(void*, const char*);
static int sqlite3OsDlclose(void*);

#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
static   int sqlite3OsFileHandle(OsFile *id);
static   int sqlite3OsLockState(OsFile *id);
#endif

/*
** If the SQLITE_ENABLE_REDEF_IO macro is defined, then the OS-layer
** interface routines are not called directly but are invoked using
** pointers to functions.  This allows the implementation of various
** OS-layer interface routines to be modified at run-time.  There are
................................................................................
** instance of the following structure, stored in the sqlite3.aModule
** hash table.
*/
struct Module {
  const sqlite3_module *pModule;       /* Callback pointers */
  const char *zName;                   /* Name passed to create_module() */
  void *pAux;                          /* pAux passed to create_module() */

};

/*
** Possible values for FuncDef.flags
*/
#define SQLITE_FUNC_LIKE   0x01  /* Candidate for the LIKE optimization */
#define SQLITE_FUNC_CASE   0x02  /* Case-sensitive LIKE-type function */
................................................................................
  char *zName;     /* Name of this column */
  Expr *pDflt;     /* Default value of this column */
  char *zType;     /* Data type for this column */
  char *zColl;     /* Collating sequence.  If NULL, use the default */
  u8 notNull;      /* True if there is a NOT NULL constraint */
  u8 isPrimKey;    /* True if this column is part of the PRIMARY KEY */
  char affinity;   /* One of the SQLITE_AFF_... values */



};

/*
** A "Collating Sequence" is defined by an instance of the following
** structure. Conceptually, a collating sequence consists of a name and
** a comparison routine that defines the order of that sequence.
**
................................................................................

/*
** Test to see whether or not a table is a virtual table.  This is
** done as a macro so that it will be optimized out when virtual
** table support is omitted from the build.
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
#  define IsVirtual(X) ((X)->isVirtual)

#else
#  define IsVirtual(X) 0

#endif

/*
** Each foreign key constraint is an instance of the following structure.
**
** A foreign key is associated with two tables.  The "from" table is
** the table that contains the REFERENCES clause that creates the foreign
................................................................................
/*
** The SQLITE_CORRUPT_BKPT macro can be either a constant (for production
** builds) or a function call (for debugging).  If it is a function call,
** it allows the operator to set a breakpoint at the spot where database
** corruption is first detected.
*/
#ifdef SQLITE_DEBUG
static   int sqlite3Corrupt(void);
# define SQLITE_CORRUPT_BKPT sqlite3Corrupt()
#else
# define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT
#endif

/*
** Internal function prototypes
*/
static int sqlite3StrICmp(const char *, const char *);
static int sqlite3StrNICmp(const char *, const char *, int);
static int sqlite3IsNumber(const char*, int*, u8);

static void *sqlite3Malloc(int,int);
static void *sqlite3MallocRaw(int,int);
static void *sqlite3Realloc(void*,int);
static char *sqlite3StrDup(const char*);
static char *sqlite3StrNDup(const char*, int);
# define sqlite3CheckMemory(a,b)
static void *sqlite3ReallocOrFree(void*,int);
static void sqlite3FreeX(void*);
static void *sqlite3MallocX(int);
#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
static   int sqlite3AllocSize(void *);
#endif

static char *sqlite3MPrintf(const char*, ...);
static char *sqlite3VMPrintf(const char*, va_list);
#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
static   void sqlite3DebugPrintf(const char*, ...);
static   void *sqlite3TextToPtr(const char*);
#endif
static void sqlite3SetString(char **, ...);
static void sqlite3ErrorMsg(Parse*, const char*, ...);
static void sqlite3ErrorClear(Parse*);
static void sqlite3Dequote(char*);
static void sqlite3DequoteExpr(Expr*);
static int sqlite3KeywordCode(const unsigned char*, int);
static int sqlite3RunParser(Parse*, const char*, char **);
static void sqlite3FinishCoding(Parse*);
static Expr *sqlite3Expr(int, Expr*, Expr*, const Token*);
static Expr *sqlite3ExprOrFree(int, Expr*, Expr*, const Token*);
static Expr *sqlite3RegisterExpr(Parse*,Token*);
static Expr *sqlite3ExprAnd(Expr*, Expr*);
static void sqlite3ExprSpan(Expr*,Token*,Token*);
static Expr *sqlite3ExprFunction(ExprList*, Token*);
static void sqlite3ExprAssignVarNumber(Parse*, Expr*);
static void sqlite3ExprDelete(Expr*);
static ExprList *sqlite3ExprListAppend(ExprList*,Expr*,Token*);
static void sqlite3ExprListDelete(ExprList*);
static int sqlite3Init(sqlite3*, char**);
static int sqlite3InitCallback(void*, int, char**, char**);
static void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
static void sqlite3ResetInternalSchema(sqlite3*, int);
static void sqlite3BeginParse(Parse*,int);
static void sqlite3CommitInternalChanges(sqlite3*);
static Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*);
static void sqlite3OpenMasterTable(Parse *, int);
static void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int);
static void sqlite3AddColumn(Parse*,Token*);
static void sqlite3AddNotNull(Parse*, int);
static void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int);
static void sqlite3AddCheckConstraint(Parse*, Expr*);
static void sqlite3AddColumnType(Parse*,Token*);
static void sqlite3AddDefaultValue(Parse*,Expr*);
static void sqlite3AddCollateType(Parse*, const char*, int);
static void sqlite3EndTable(Parse*,Token*,Token*,Select*);

static void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int);

#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
static   int sqlite3ViewGetColumnNames(Parse*,Table*);
#else
# define sqlite3ViewGetColumnNames(A,B) 0
#endif

static void sqlite3DropTable(Parse*, SrcList*, int, int);
static void sqlite3DeleteTable(Table*);
static void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
static void *sqlite3ArrayAllocate(void*,int,int,int*,int*,int*);
static IdList *sqlite3IdListAppend(IdList*, Token*);
static int sqlite3IdListIndex(IdList*,const char*);
static SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*);
static SrcList *sqlite3SrcListAppendFromTerm(SrcList*, Token*, Token*, Token*,
                                      Select*, Expr*, IdList*);
static void sqlite3SrcListShiftJoinType(SrcList*);
static void sqlite3SrcListAssignCursors(Parse*, SrcList*);
static void sqlite3IdListDelete(IdList*);
static void sqlite3SrcListDelete(SrcList*);
static void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
                        Token*, int, int);
static void sqlite3DropIndex(Parse*, SrcList*, int);
static int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*, char *aff);
static Select *sqlite3SelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*,
                        int,Expr*,Expr*);
static void sqlite3SelectDelete(Select*);
static Table *sqlite3SrcListLookup(Parse*, SrcList*);
static int sqlite3IsReadOnly(Parse*, Table*, int);
static void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int);
static void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
static void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
static WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**);
static void sqlite3WhereEnd(WhereInfo*);
static void sqlite3ExprCodeGetColumn(Vdbe*, Table*, int, int);
static void sqlite3ExprCode(Parse*, Expr*);
static void sqlite3ExprCodeAndCache(Parse*, Expr*);
static int sqlite3ExprCodeExprList(Parse*, ExprList*);
static void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
static void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
static Table *sqlite3FindTable(sqlite3*,const char*, const char*);
static Table *sqlite3LocateTable(Parse*,const char*, const char*);
static Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
static void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
static void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
static void sqlite3Vacuum(Parse*);
static int sqlite3RunVacuum(char**, sqlite3*);
static char *sqlite3NameFromToken(Token*);
static int sqlite3ExprCompare(Expr*, Expr*);
int sqliteFuncId(Token*);
static int sqlite3ExprResolveNames(NameContext *, Expr *);
static int sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
static int sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);
static Vdbe *sqlite3GetVdbe(Parse*);
static Expr *sqlite3CreateIdExpr(const char*);
static void sqlite3Randomness(int, void*);
static void sqlite3RollbackAll(sqlite3*);
static void sqlite3CodeVerifySchema(Parse*, int);
static void sqlite3BeginTransaction(Parse*, int);
static void sqlite3CommitTransaction(Parse*);
static void sqlite3RollbackTransaction(Parse*);
static int sqlite3ExprIsConstant(Expr*);
static int sqlite3ExprIsConstantNotJoin(Expr*);
static int sqlite3ExprIsConstantOrFunction(Expr*);
static int sqlite3ExprIsInteger(Expr*, int*);
static int sqlite3IsRowid(const char*);
static void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int);
static void sqlite3GenerateRowIndexDelete(Vdbe*, Table*, int, char*);
static void sqlite3GenerateIndexKey(Vdbe*, Index*, int);
static void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
static void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int, int);
static void sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
static void sqlite3BeginWriteOperation(Parse*, int, int);
static Expr *sqlite3ExprDup(Expr*);
static void sqlite3TokenCopy(Token*, Token*);
static ExprList *sqlite3ExprListDup(ExprList*);
static SrcList *sqlite3SrcListDup(SrcList*);
static IdList *sqlite3IdListDup(IdList*);
static Select *sqlite3SelectDup(Select*);
static FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int);
static void sqlite3RegisterBuiltinFunctions(sqlite3*);
static void sqlite3RegisterDateTimeFunctions(sqlite3*);
static int sqlite3SafetyOn(sqlite3*);
static int sqlite3SafetyOff(sqlite3*);
static int sqlite3SafetyCheck(sqlite3*);
static void sqlite3ChangeCookie(sqlite3*, Vdbe*, int);

#ifndef SQLITE_OMIT_TRIGGER
static   void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*,
                           Expr*,int, int);
static   void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
static   void sqlite3DropTrigger(Parse*, SrcList*, int);
static   void sqlite3DropTriggerPtr(Parse*, Trigger*);
static   int sqlite3TriggersExist(Parse*, Table*, int, ExprList*);
static   int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int, 
                           int, int);
  void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
static   void sqlite3DeleteTriggerStep(TriggerStep*);
static   TriggerStep *sqlite3TriggerSelectStep(Select*);
static   TriggerStep *sqlite3TriggerInsertStep(Token*, IdList*, ExprList*,Select*,int);
static   TriggerStep *sqlite3TriggerUpdateStep(Token*, ExprList*, Expr*, int);
static   TriggerStep *sqlite3TriggerDeleteStep(Token*, Expr*);
static   void sqlite3DeleteTrigger(Trigger*);
static   void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
#else
# define sqlite3TriggersExist(A,B,C,D,E,F) 0
# define sqlite3DeleteTrigger(A)
# define sqlite3DropTriggerPtr(A,B)
# define sqlite3UnlinkAndDeleteTrigger(A,B,C)
# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 0
#endif

static int sqlite3JoinType(Parse*, Token*, Token*, Token*);
static void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int);
static void sqlite3DeferForeignKey(Parse*, int);
#ifndef SQLITE_OMIT_AUTHORIZATION
static   void sqlite3AuthRead(Parse*,Expr*,SrcList*);
static   int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*);
static   void sqlite3AuthContextPush(Parse*, AuthContext*, const char*);
static   void sqlite3AuthContextPop(AuthContext*);
#else
# define sqlite3AuthRead(a,b,c)
# define sqlite3AuthCheck(a,b,c,d,e)    SQLITE_OK
# define sqlite3AuthContextPush(a,b,c)
# define sqlite3AuthContextPop(a)  ((void)(a))
#endif
static void sqlite3Attach(Parse*, Expr*, Expr*, Expr*);
static void sqlite3Detach(Parse*, Expr*);
static int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename,
                       int omitJournal, int nCache, Btree **ppBtree);
static int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
static int sqlite3FixSrcList(DbFixer*, SrcList*);
static int sqlite3FixSelect(DbFixer*, Select*);
static int sqlite3FixExpr(DbFixer*, Expr*);
static int sqlite3FixExprList(DbFixer*, ExprList*);
static int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
static int sqlite3AtoF(const char *z, double*);
char *sqlite3_snprintf(int,char*,const char*,...);
static int sqlite3GetInt32(const char *, int*);
static int sqlite3FitsIn64Bits(const char *);
static int sqlite3Utf16ByteLen(const void *pData, int nChar);
static int sqlite3Utf8CharLen(const char *pData, int nByte);
static u32 sqlite3ReadUtf8(const unsigned char *);
static int sqlite3PutVarint(unsigned char *, u64);
static int sqlite3GetVarint(const unsigned char *, u64 *);
static int sqlite3GetVarint32(const unsigned char *, u32 *);
static int sqlite3VarintLen(u64 v);
static void sqlite3IndexAffinityStr(Vdbe *, Index *);
static void sqlite3TableAffinityStr(Vdbe *, Table *);
static char sqlite3CompareAffinity(Expr *pExpr, char aff2);
static int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity);
static char sqlite3ExprAffinity(Expr *pExpr);
static int sqlite3Atoi64(const char*, i64*);
static void sqlite3Error(sqlite3*, int, const char*,...);
static void *sqlite3HexToBlob(const char *z);
static int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);
static const char *sqlite3ErrStr(int);
static int sqlite3ReadSchema(Parse *pParse);
static CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char *,int,int);
static CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName);
static CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr);
static Expr *sqlite3ExprSetColl(Parse *pParse, Expr *, Token *);
static int sqlite3CheckCollSeq(Parse *, CollSeq *);
static int sqlite3CheckObjectName(Parse *, const char *);
static void sqlite3VdbeSetChanges(sqlite3 *, int);
static void sqlite3Utf16Substr(sqlite3_context *,int,sqlite3_value **);

static const void *sqlite3ValueText(sqlite3_value*, u8);
static int sqlite3ValueBytes(sqlite3_value*, u8);
static void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, void(*)(void*));
static void sqlite3ValueFree(sqlite3_value*);
static sqlite3_value *sqlite3ValueNew(void);
static char *sqlite3Utf16to8(const void*, int);
static int sqlite3ValueFromExpr(Expr *, u8, u8, sqlite3_value **);
static void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
extern const unsigned char sqlite3UpperToLower[];
static void sqlite3RootPageMoved(Db*, int, int);
static void sqlite3Reindex(Parse*, Token*, Token*);
static void sqlite3AlterFunctions(sqlite3*);
static void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
static int sqlite3GetToken(const unsigned char *, int *);
static void sqlite3NestedParse(Parse*, const char*, ...);
static void sqlite3ExpirePreparedStatements(sqlite3*);
static void sqlite3CodeSubselect(Parse *, Expr *);
static int sqlite3SelectResolve(Parse *, Select *, NameContext *);
static void sqlite3ColumnDefault(Vdbe *, Table *, int);
static void sqlite3AlterFinishAddColumn(Parse *, Token *);
static void sqlite3AlterBeginAddColumn(Parse *, SrcList *);
static CollSeq *sqlite3GetCollSeq(sqlite3*, CollSeq *, const char *, int);
static char sqlite3AffinityType(const Token*);
static void sqlite3Analyze(Parse*, Token*, Token*);
static int sqlite3InvokeBusyHandler(BusyHandler*);
static int sqlite3FindDb(sqlite3*, Token*);
static int sqlite3AnalysisLoad(sqlite3*,int iDB);
static void sqlite3DefaultRowEst(Index*);
static void sqlite3RegisterLikeFunctions(sqlite3*, int);
static int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
static ThreadData *sqlite3ThreadData(void);
static const ThreadData *sqlite3ThreadDataReadOnly(void);
static void sqlite3ReleaseThreadData(void);
static void sqlite3AttachFunctions(sqlite3 *);
static void sqlite3MinimumFileFormat(Parse*, int, int);
static void sqlite3SchemaFree(void *);
static Schema *sqlite3SchemaGet(Btree *);
static int sqlite3SchemaToIndex(sqlite3 *db, Schema *);
static KeyInfo *sqlite3IndexKeyinfo(Parse *, Index *);
static int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *, 
  void (*)(sqlite3_context*,int,sqlite3_value **),
  void (*)(sqlite3_context*,int,sqlite3_value **), void (*)(sqlite3_context*));
static int sqlite3ApiExit(sqlite3 *db, int);
static void sqlite3FailedMalloc(void);
static void sqlite3AbortOtherActiveVdbes(sqlite3 *, Vdbe *);
static int sqlite3OpenTempDatabase(Parse *);

#ifndef SQLITE_OMIT_LOAD_EXTENSION
static   void sqlite3CloseExtensions(sqlite3*);
static   int sqlite3AutoLoadExtensions(sqlite3*);
#else
# define sqlite3CloseExtensions(X)
# define sqlite3AutoLoadExtensions(X)  SQLITE_OK
#endif

#ifndef SQLITE_OMIT_SHARED_CACHE
static   void sqlite3TableLock(Parse *, int, int, u8, const char *);
#else
  #define sqlite3TableLock(v,w,x,y,z)
#endif

#ifdef SQLITE_TEST
static   int sqlite3Utf8To8(unsigned char*);
#endif

#ifdef SQLITE_MEMDEBUG
static   void sqlite3MallocDisallow(void);
static   void sqlite3MallocAllow(void);
static   int sqlite3TestMallocFail(void);
#else
  #define sqlite3TestMallocFail() 0
  #define sqlite3MallocDisallow()
  #define sqlite3MallocAllow()
#endif

#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
static   void *sqlite3ThreadSafeMalloc(int);
static   void sqlite3ThreadSafeFree(void *);
#else
  #define sqlite3ThreadSafeMalloc sqlite3MallocX
  #define sqlite3ThreadSafeFree sqlite3FreeX
#endif

#ifdef SQLITE_OMIT_VIRTUALTABLE
#  define sqlite3VtabClear(X)
#  define sqlite3VtabSync(X,Y) (Y)
#  define sqlite3VtabRollback(X)
#  define sqlite3VtabCommit(X)
#else
static    void sqlite3VtabClear(Table*);
static    int sqlite3VtabSync(sqlite3 *db, int rc);
static    int sqlite3VtabRollback(sqlite3 *db);
static    int sqlite3VtabCommit(sqlite3 *db);
#endif
static void sqlite3VtabLock(sqlite3_vtab*);
static void sqlite3VtabUnlock(sqlite3*, sqlite3_vtab*);
static void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*);
static void sqlite3VtabFinishParse(Parse*, Token*);
static void sqlite3VtabArgInit(Parse*);
static void sqlite3VtabArgExtend(Parse*, Token*);
static int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **);
static int sqlite3VtabCallConnect(Parse*, Table*);
static int sqlite3VtabCallDestroy(sqlite3*, int, const char *);
static int sqlite3VtabBegin(sqlite3 *, sqlite3_vtab *);
static FuncDef *sqlite3VtabOverloadFunction(FuncDef*, int nArg, Expr*);
static void sqlite3InvalidFunction(sqlite3_context*,int,sqlite3_value**);
static int sqlite3Reprepare(Vdbe*);
static void sqlite3ExprListCheckLength(Parse*, ExprList*, int, const char*);
CollSeq* sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);

#if SQLITE_MAX_EXPR_DEPTH>0
static   void sqlite3ExprSetHeight(Expr *);
static   int sqlite3SelectExprHeight(Select *);
#else
  #define sqlite3ExprSetHeight(x)
#endif

static u32 sqlite3Get2byte(const u8*);
static u32 sqlite3Get4byte(const u8*);
static void sqlite3Put2byte(u8*, u32);
static void sqlite3Put4byte(u8*, u32);

#ifdef SQLITE_SSE
#include "sseInt.h"
#endif

#ifdef SQLITE_DEBUG
static   void sqlite3ParserTrace(FILE*, char *);
#endif

/*
** If the SQLITE_ENABLE IOTRACE exists then the global variable
** sqlite3_io_trace is a pointer to a printf-like routine used to
** print I/O tracing messages. 
*/
#ifdef SQLITE_ENABLE_IOTRACE
# define IOTRACE(A)  if( sqlite3_io_trace ){ sqlite3_io_trace A; }
static   void sqlite3VdbeIOTraceSql(Vdbe*);
#else
# define IOTRACE(A)
# define sqlite3VdbeIOTraceSql(X)
#endif
extern void (*sqlite3_io_trace)(const char*,...);

#endif
................................................................................
#endif

/*
** This function registered all of the above C functions as SQL
** functions.  This should be the only routine in this file with
** external linkage.
*/
static void sqlite3RegisterDateTimeFunctions(sqlite3 *db){
#ifndef SQLITE_OMIT_DATETIME_FUNCS
  static const struct {
     char *zName;
     int nArg;
     void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
  } aFuncs[] = {
    { "julianday", -1, juliandayFunc   },
................................................................................

/*
** The following routines are convenience wrappers around methods
** of the OsFile object.  This is mostly just syntactic sugar.  All
** of this would be completely automatic if SQLite were coded using
** C++ instead of plain old C.
*/
static int sqlite3OsClose(OsFile **pId){
  OsFile *id;
  if( pId!=0 && (id = *pId)!=0 ){
    return id->pMethod->xClose(pId);
  }else{
    return SQLITE_OK;
  }
}
static int sqlite3OsOpenDirectory(OsFile *id, const char *zName){
  return id->pMethod->xOpenDirectory(id, zName);
}
static int sqlite3OsRead(OsFile *id, void *pBuf, int amt){
  return id->pMethod->xRead(id, pBuf, amt);
}
static int sqlite3OsWrite(OsFile *id, const void *pBuf, int amt){
  return id->pMethod->xWrite(id, pBuf, amt);
}
static int sqlite3OsSeek(OsFile *id, i64 offset){
  return id->pMethod->xSeek(id, offset);
}
static int sqlite3OsTruncate(OsFile *id, i64 size){
  return id->pMethod->xTruncate(id, size);
}
static int sqlite3OsSync(OsFile *id, int fullsync){
  return id->pMethod->xSync(id, fullsync);
}
static void sqlite3OsSetFullSync(OsFile *id, int value){
  id->pMethod->xSetFullSync(id, value);
}
static int sqlite3OsFileSize(OsFile *id, i64 *pSize){
  return id->pMethod->xFileSize(id, pSize);
}
static int sqlite3OsLock(OsFile *id, int lockType){
  return id->pMethod->xLock(id, lockType);
}
static int sqlite3OsUnlock(OsFile *id, int lockType){
  return id->pMethod->xUnlock(id, lockType);
}
static int sqlite3OsCheckReservedLock(OsFile *id){
  return id->pMethod->xCheckReservedLock(id);
}
static int sqlite3OsSectorSize(OsFile *id){
  int (*xSectorSize)(OsFile*) = id->pMethod->xSectorSize;
  return xSectorSize ? xSectorSize(id) : SQLITE_DEFAULT_SECTOR_SIZE;
}

#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
  /* These methods are currently only used for testing and debugging. */
  int sqlite3OsFileHandle(OsFile *id){
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** Memory allocation functions used throughout sqlite.
**
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** MALLOC WRAPPER ARCHITECTURE
**
** The sqlite code accesses dynamic memory allocation/deallocation by invoking
** the following six APIs (which may be implemented as macros).
................................................................................
int sqlite3_iLine = 0;            /* Line number for debug info */
int sqlite3_mallocfail_trace = 0; /* Print a msg on malloc fail if true */

/*
** Check for a simulated memory allocation failure.  Return true if
** the failure should be simulated.  Return false to proceed as normal.
*/
static int sqlite3TestMallocFail(){
  if( sqlite3_isFail ){
    return 1;
  }
  if( sqlite3_iMallocFail>=0 ){
    sqlite3_iMallocFail--;
    if( sqlite3_iMallocFail==0 ){
      sqlite3_iMallocFail = sqlite3_iMallocReset;
................................................................................
**     * The value of the sqlite3_malloc_id variable ...
**     * The output of backtrace() (if available) ...
**
** Todo: We could have a version of this function that outputs to stdout, 
** to debug memory leaks when Tcl is not available.
*/
#if defined(TCLSH) && defined(SQLITE_DEBUG) && SQLITE_MEMDEBUG>1
static int sqlite3OutstandingMallocs(Tcl_Interp *interp){
  void *p;
  Tcl_Obj *pRes = Tcl_NewObj();
  Tcl_IncrRefCount(pRes);


  for(p=sqlite3_pFirst; p; p=((void **)p)[1]){
    Tcl_Obj *pEntry = Tcl_NewObj();
................................................................................
#endif

/*
** Allocate and return N bytes of uninitialised memory by calling
** sqlite3OsMalloc(). If the Malloc() call fails, attempt to free memory 
** by calling sqlite3_release_memory().
*/
static void *sqlite3MallocRaw(int n, int doMemManage){
  void *p = 0;
  if( n>0 && !sqlite3MallocFailed() && (!doMemManage || enforceSoftLimit(n)) ){
    while( (p = OSMALLOC(n))==0 && sqlite3_release_memory(n) ){}
    if( !p ){
      sqlite3FailedMalloc();
      OSMALLOC_FAILED();
    }else if( doMemManage ){
................................................................................
}

/*
** Resize the allocation at p to n bytes by calling sqlite3OsRealloc(). The
** pointer to the new allocation is returned.  If the Realloc() call fails,
** attempt to free memory by calling sqlite3_release_memory().
*/
static void *sqlite3Realloc(void *p, int n){
  if( sqlite3MallocFailed() ){
    return 0;
  }

  if( !p ){
    return sqlite3Malloc(n, 1);
  }else{
................................................................................
  }
}

/*
** Free the memory pointed to by p. p must be either a NULL pointer or a 
** value returned by a previous call to sqlite3Malloc() or sqlite3Realloc().
*/
static void sqlite3FreeX(void *p){
  if( p ){
    updateMemoryUsedCount(0 - OSSIZEOF(p));
    OSFREE(p);
  }
}

/*
** A version of sqliteMalloc() that is always a function, not a macro.
** Currently, this is used only to alloc to allocate the parser engine.
*/
static void *sqlite3MallocX(int n){
  return sqliteMalloc(n);
}

/*
** sqlite3Malloc
** sqlite3ReallocOrFree
**
** These two are implemented as wrappers around sqlite3MallocRaw(), 
** sqlite3Realloc() and sqlite3Free().
*/ 
static void *sqlite3Malloc(int n, int doMemManage){
  void *p = sqlite3MallocRaw(n, doMemManage);
  if( p ){
    memset(p, 0, n);
  }
  return p;
}
static void *sqlite3ReallocOrFree(void *p, int n){
  void *pNew;
  pNew = sqlite3Realloc(p, n);
  if( !pNew ){
    sqlite3FreeX(p);
  }
  return pNew;
}
................................................................................
**     respect to the soft-heap-limit, and
**
**   * sqlite3ThreadSafeMalloc() must be matched with ThreadSafeFree(),
**     not sqlite3Free(). Calling sqlite3Free() on memory obtained from
**     ThreadSafeMalloc() will cause an error somewhere down the line.
*/
#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
static void *sqlite3ThreadSafeMalloc(int n){
  (void)ENTER_MALLOC;
  return sqlite3Malloc(n, 0);
}
static void sqlite3ThreadSafeFree(void *p){
  (void)ENTER_MALLOC;
  if( p ){
    OSFREE(p);
  }
}
#endif

................................................................................
**
** The number of bytes allocated does not include any overhead inserted by 
** any malloc() wrapper functions that may be called. So the value returned
** is the number of bytes that were available to SQLite using pointer p, 
** regardless of how much memory was actually allocated.
*/
#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
static int sqlite3AllocSize(void *p){
  return OSSIZEOF(p);
}
#endif

/*
** Make a copy of a string in memory obtained from sqliteMalloc(). These 
** functions call sqlite3MallocRaw() directly instead of sqliteMalloc(). This
** is because when memory debugging is turned on, these two functions are 
** called via macros that record the current file and line number in the
** ThreadData structure.
*/
static char *sqlite3StrDup(const char *z){
  char *zNew;
  int n;
  if( z==0 ) return 0;
  n = strlen(z)+1;
  zNew = sqlite3MallocRaw(n, 1);
  if( zNew ) memcpy(zNew, z, n);
  return zNew;
}
static char *sqlite3StrNDup(const char *z, int n){
  char *zNew;
  if( z==0 ) return 0;
  zNew = sqlite3MallocRaw(n+1, 1);
  if( zNew ){
    memcpy(zNew, z, n);
    zNew[n] = 0;
  }
................................................................................
/*
** Create a string from the 2nd and subsequent arguments (up to the
** first NULL argument), store the string in memory obtained from
** sqliteMalloc() and make the pointer indicated by the 1st argument
** point to that string.  The 1st argument must either be NULL or 
** point to memory obtained from sqliteMalloc().
*/
static void sqlite3SetString(char **pz, ...){
  va_list ap;
  int nByte;
  const char *z;
  char *zResult;

  assert( pz!=0 );
  nByte = 1;
................................................................................
** invocation SQLITE_NOMEM is returned instead. 
**
** If the first argument, db, is not NULL and a malloc() error has occured,
** then the connection error-code (the value returned by sqlite3_errcode())
** is set to SQLITE_NOMEM.
*/
int sqlite3_mallocHasFailed = 0;
static int sqlite3ApiExit(sqlite3* db, int rc){
  if( sqlite3MallocFailed() ){
    sqlite3_mallocHasFailed = 0;
    sqlite3OsLeaveMutex();
    sqlite3Error(db, SQLITE_NOMEM, 0);
    rc = SQLITE_NOMEM;
  }
  return rc & (db ? db->errMask : 0xff);
}

/* 
** Set the "malloc has failed" condition to true for this thread.
*/
static void sqlite3FailedMalloc(){
  if( !sqlite3MallocFailed() ){
    sqlite3OsEnterMutex();
    assert( sqlite3_mallocHasFailed==0 );
    sqlite3_mallocHasFailed = 1;
  }
}

#ifdef SQLITE_MEMDEBUG
/*
** This function sets a flag in the thread-specific-data structure that will
** cause an assert to fail if sqliteMalloc() or sqliteRealloc() is called.
*/
static void sqlite3MallocDisallow(){
  assert( sqlite3_mallocDisallowed>=0 );
  sqlite3_mallocDisallowed++;
}

/*
** This function clears the flag set in the thread-specific-data structure set
** by sqlite3MallocDisallow().
*/
static void sqlite3MallocAllow(){
  assert( sqlite3_mallocDisallowed>0 );
  sqlite3_mallocDisallowed--;
}
#endif

/************** End of malloc.c **********************************************/
/************** Begin file printf.c ******************************************/
................................................................................
#define etCHARLIT    10 /* Literal characters.  %' */
#define etSQLESCAPE  11 /* Strings with '\'' doubled.  %q */
#define etSQLESCAPE2 12 /* Strings with '\'' doubled and enclosed in '',
                          NULL pointers replaced by SQL NULL.  %Q */
#define etTOKEN      13 /* a pointer to a Token structure */
#define etSRCLIST    14 /* a pointer to a SrcList */
#define etPOINTER    15 /* The %p conversion */



/*
** An "etByte" is an 8-bit unsigned value.
*/
typedef unsigned char etByte;

................................................................................
static const et_info fmtinfo[] = {
  {  'd', 10, 1, etRADIX,      0,  0 },
  {  's',  0, 4, etSTRING,     0,  0 },
  {  'g',  0, 1, etGENERIC,    30, 0 },
  {  'z',  0, 6, etDYNSTRING,  0,  0 },
  {  'q',  0, 4, etSQLESCAPE,  0,  0 },
  {  'Q',  0, 4, etSQLESCAPE2, 0,  0 },

  {  'c',  0, 0, etCHARX,      0,  0 },
  {  'o',  8, 0, etRADIX,      0,  2 },
  {  'u', 10, 0, etRADIX,      0,  0 },
  {  'x', 16, 0, etRADIX,      16, 1 },
  {  'X', 16, 0, etRADIX,      0,  4 },
#ifndef SQLITE_OMIT_FLOATING_POINT
  {  'f',  0, 1, etFLOAT,      0,  0 },
................................................................................
#else
        /* It makes more sense to use 0.5 */
        for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){}
#endif
        if( xtype==etFLOAT ) realvalue += rounder;
        /* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
        exp = 0;
        if( isnan(realvalue) ){
          bufpt = "NaN";
          length = 3;
          break;
        }
        if( realvalue>0.0 ){
          while( realvalue>=1e32 && exp<=350 ){ realvalue *= 1e-32; exp+=32; }
          while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; }
................................................................................
        }else if( xtype==etDYNSTRING ){
          zExtra = bufpt;
        }
        length = strlen(bufpt);
        if( precision>=0 && precision<length ) length = precision;
        break;
      case etSQLESCAPE:
      case etSQLESCAPE2: {

        int i, j, n, ch, isnull;
        int needQuote;

        char *escarg = va_arg(ap,char*);
        isnull = escarg==0;
        if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)");
        for(i=n=0; (ch=escarg[i])!=0; i++){
          if( ch=='\'' )  n++;
        }
        needQuote = !isnull && xtype==etSQLESCAPE2;
        n += i + 1 + needQuote*2;
        if( n>etBUFSIZE ){
          bufpt = zExtra = sqliteMalloc( n );
          if( bufpt==0 ) return -1;
        }else{
          bufpt = buf;
        }
        j = 0;
        if( needQuote ) bufpt[j++] = '\'';
        for(i=0; (ch=escarg[i])!=0; i++){
          bufpt[j++] = ch;
          if( ch=='\'' ) bufpt[j++] = ch;
        }
        if( needQuote ) bufpt[j++] = '\'';
        bufpt[j] = 0;
        length = j;
        /* The precision is ignored on %q and %Q */
        /* if( precision>=0 && precision<length ) length = precision; */
        break;
      }
      case etTOKEN: {
................................................................................
  return sqliteRealloc(old,size);
}

/*
** Print into memory obtained from sqliteMalloc().  Use the internal
** %-conversion extensions.
*/
static char *sqlite3VMPrintf(const char *zFormat, va_list ap){
  char zBase[SQLITE_PRINT_BUF_SIZE];
  return base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap);
}

/*
** Print into memory obtained from sqliteMalloc().  Use the internal
** %-conversion extensions.
*/
static char *sqlite3MPrintf(const char *zFormat, ...){
  va_list ap;
  char *z;
  char zBase[SQLITE_PRINT_BUF_SIZE];
  va_start(ap, zFormat);
  z = base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap);
  va_end(ap);
  return z;
}

/*
** Print into memory obtained from sqlite3_malloc().  Omit the internal
** %-conversion extensions.
*/
char *sqlite3_vmprintf(const char *zFormat, va_list ap){
  char zBase[SQLITE_PRINT_BUF_SIZE];
  return base_vprintf(sqlite3_realloc, 0, zBase, sizeof(zBase), zFormat, ap);
}

/*
** Print into memory obtained from sqlite3_malloc()().  Omit the internal
** %-conversion extensions.
*/
char *sqlite3_mprintf(const char *zFormat, ...){
  va_list ap;
  char *z;
  va_start(ap, zFormat);
  z = sqlite3_vmprintf(zFormat, ap);
  va_end(ap);
  return z;
}
................................................................................

/*
** sqlite3_snprintf() works like snprintf() except that it ignores the
** current locale settings.  This is important for SQLite because we
** are not able to use a "," as the decimal point in place of "." as
** specified by some locales.
*/
char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){
  char *z;
  va_list ap;

  if( n<=0 ){
    return zBuf;
  }
  zBuf[0] = 0;
................................................................................

#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG) || defined(SQLITE_MEMDEBUG)
/*
** A version of printf() that understands %lld.  Used for debugging.
** The printf() built into some versions of windows does not understand %lld
** and segfaults if you give it a long long int.
*/
static void sqlite3DebugPrintf(const char *zFormat, ...){
  extern int getpid(void);
  va_list ap;
  char zBuf[500];
  va_start(ap, zFormat);
  base_vprintf(0, 0, zBuf, sizeof(zBuf), zFormat, ap);
  va_end(ap);
  fprintf(stdout,"%s", zBuf);
................................................................................
*************************************************************************
** This file contains code to implement a pseudo-random number
** generator (PRNG) for SQLite.
**
** Random numbers are used by some of the database backends in order
** to generate random integer keys for tables or random filenames.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/


/*
** Get a single 8-bit random value from the RC4 PRNG.  The Mutex
** must be held while executing this routine.
**
................................................................................
  t += prng.s[prng.i];
  return prng.s[t];
}

/*
** Return N random bytes.
*/
static void sqlite3Randomness(int N, void *pBuf){
  unsigned char *zBuf = pBuf;
  sqlite3OsEnterMutex();
  while( N-- ){
    *(zBuf++) = randomByte();
  }
  sqlite3OsLeaveMutex();
}
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used to translate between UTF-8, 
** UTF-16, UTF-16BE, and UTF-16LE.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
**
** Notes on UTF-8:
**
**   Byte-0    Byte-1    Byte-2    Byte-3    Value
**  0xxxxxxx                                 00000000 00000000 0xxxxxxx
**  110yyyyy  10xxxxxx                       00000000 00000yyy yyxxxxxx
**  1110zzzz  10yyyyyy  10xxxxxx             00000000 zzzzyyyy yyxxxxxx
................................................................................
  int nChange;            /* Number of db changes made since last reset */
  i64 startTime;          /* Time when query started - used for profiling */
  int nSql;             /* Number of bytes in zSql */
  char *zSql;           /* Text of the SQL statement that generated this */
#ifdef SQLITE_DEBUG
  FILE *trace;        /* Write an execution trace here, if not NULL */
#endif

#ifdef SQLITE_SSE
  int fetchId;          /* Statement number used by sqlite3_fetch_statement */
  int lru;              /* Counter used for LRU cache replacement */
#endif
};

/*
................................................................................
#define VDBE_MAGIC_RUN      0xbdf20da3    /* VDBE is ready to execute */
#define VDBE_MAGIC_HALT     0x519c2973    /* VDBE has completed execution */
#define VDBE_MAGIC_DEAD     0xb606c3c8    /* The VDBE has been deallocated */

/*
** Function prototypes
*/
static void sqlite3VdbeFreeCursor(Vdbe *, Cursor*);
void sqliteVdbePopStack(Vdbe*,int);
static int sqlite3VdbeCursorMoveto(Cursor*);
#if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE)
static void sqlite3VdbePrintOp(FILE*, int, Op*);
#endif
static int sqlite3VdbeSerialTypeLen(u32);
static u32 sqlite3VdbeSerialType(Mem*, int);
static int sqlite3VdbeSerialPut(unsigned char*, int, Mem*, int);
static int sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*);
static void sqlite3VdbeDeleteAuxData(VdbeFunc*, int);

int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *);
static int sqlite3VdbeIdxKeyCompare(Cursor*, int , const unsigned char*, int*);
static int sqlite3VdbeIdxRowid(BtCursor *, i64 *);
static int sqlite3MemCompare(const Mem*, const Mem*, const CollSeq*);
static int sqlite3VdbeRecordCompare(void*,int,const void*,int, const void*);
static int sqlite3VdbeIdxRowidLen(const u8*);
static int sqlite3VdbeExec(Vdbe*);
static int sqlite3VdbeList(Vdbe*);
static int sqlite3VdbeHalt(Vdbe*);
static int sqlite3VdbeChangeEncoding(Mem *, int);
static int sqlite3VdbeMemTooBig(Mem*);
static int sqlite3VdbeMemCopy(Mem*, const Mem*);
static void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int);
static int sqlite3VdbeMemMove(Mem*, Mem*);
static int sqlite3VdbeMemNulTerminate(Mem*);
static int sqlite3VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*));
static void sqlite3VdbeMemSetInt64(Mem*, i64);
static void sqlite3VdbeMemSetDouble(Mem*, double);
static void sqlite3VdbeMemSetNull(Mem*);
static void sqlite3VdbeMemSetZeroBlob(Mem*,int);
static int sqlite3VdbeMemMakeWriteable(Mem*);
static int sqlite3VdbeMemDynamicify(Mem*);
static int sqlite3VdbeMemStringify(Mem*, int);
static i64 sqlite3VdbeIntValue(Mem*);
static int sqlite3VdbeMemIntegerify(Mem*);
static double sqlite3VdbeRealValue(Mem*);
static void sqlite3VdbeIntegerAffinity(Mem*);
static int sqlite3VdbeMemRealify(Mem*);
static int sqlite3VdbeMemNumerify(Mem*);
static int sqlite3VdbeMemFromBtree(BtCursor*,int,int,int,Mem*);
static void sqlite3VdbeMemRelease(Mem *p);
static int sqlite3VdbeMemFinalize(Mem*, FuncDef*);
#ifndef NDEBUG
static   void sqlite3VdbeMemSanity(Mem*);
static   int sqlite3VdbeOpcodeNoPush(u8);
#endif
static int sqlite3VdbeMemTranslate(Mem*, u8);
#ifdef SQLITE_DEBUG
static   void sqlite3VdbePrintSql(Vdbe*);
static   void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf);
#endif
static int sqlite3VdbeMemHandleBom(Mem *pMem);
static void sqlite3VdbeFifoInit(Fifo*);
static int sqlite3VdbeFifoPush(Fifo*, i64);
static int sqlite3VdbeFifoPop(Fifo*, i64*);
static void sqlite3VdbeFifoClear(Fifo*);

#ifndef SQLITE_OMIT_INCRBLOB
static   int sqlite3VdbeMemExpandBlob(Mem *);
#else
  #define sqlite3VdbeMemExpandBlob(x) SQLITE_OK
#endif

#endif /* !defined(_VDBEINT_H_) */

/************** End of vdbeInt.h *********************************************/
................................................................................

#ifndef SQLITE_OMIT_UTF16
/*
** This routine transforms the internal text encoding used by pMem to
** desiredEnc. It is an error if the string is already of the desired
** encoding, or if *pMem does not contain a string value.
*/
static int sqlite3VdbeMemTranslate(Mem *pMem, u8 desiredEnc){
  unsigned char zShort[NBFS]; /* Temporary short output buffer */
  int len;                    /* Maximum length of output string in bytes */
  unsigned char *zOut;                  /* Output buffer */
  unsigned char *zIn;                   /* Input iterator */
  unsigned char *zTerm;                 /* End of input */
  unsigned char *z;                     /* Output iterator */
  unsigned int c;
................................................................................
** UTF-16 string stored in *pMem. If one is present, it is removed and
** the encoding of the Mem adjusted. This routine does not do any
** byte-swapping, it just sets Mem.enc appropriately.
**
** The allocation (static, dynamic etc.) and encoding of the Mem may be
** changed by this function.
*/
static int sqlite3VdbeMemHandleBom(Mem *pMem){
  int rc = SQLITE_OK;
  u8 bom = 0;

  if( pMem->n<0 || pMem->n>1 ){
    u8 b1 = *(u8 *)pMem->z;
    u8 b2 = *(((u8 *)pMem->z) + 1);
    if( b1==0xFE && b2==0xFF ){
................................................................................
/*
** pZ is a UTF-8 encoded unicode string. If nByte is less than zero,
** return the number of unicode characters in pZ up to (but not including)
** the first 0x00 byte. If nByte is not less than zero, return the
** number of unicode characters in the first nByte of pZ (or up to 
** the first 0x00, whichever comes first).
*/
static int sqlite3Utf8CharLen(const char *zIn, int nByte){
  int r = 0;
  const u8 *z = (const u8*)zIn;
  const u8 *zTerm;
  if( nByte>=0 ){
    zTerm = &z[nByte];
  }else{
    zTerm = (const u8*)(-1);
................................................................................
/*
** Convert a UTF-16 string in the native encoding into a UTF-8 string.
** Memory to hold the UTF-8 string is obtained from malloc and must be
** freed by the calling function.
**
** NULL is returned if there is an allocation error.
*/
static char *sqlite3Utf16to8(const void *z, int nByte){
  Mem m;
  memset(&m, 0, sizeof(m));
  sqlite3VdbeMemSetStr(&m, z, nByte, SQLITE_UTF16NATIVE, SQLITE_STATIC);
  sqlite3VdbeChangeEncoding(&m, SQLITE_UTF8);
  assert( (m.flags & MEM_Term)!=0 || sqlite3MallocFailed() );
  assert( (m.flags & MEM_Str)!=0 || sqlite3MallocFailed() );
  return (m.flags & MEM_Dyn)!=0 ? m.z : sqliteStrDup(m.z);
................................................................................
/*
** pZ is a UTF-16 encoded unicode string. If nChar is less than zero,
** return the number of bytes up to (but not including), the first pair
** of consecutive 0x00 bytes in pZ. If nChar is not less than zero,
** then return the number of bytes in the first nChar unicode characters
** in pZ (or up until the first pair of 0x00 bytes, whichever comes first).
*/
static int sqlite3Utf16ByteLen(const void *zIn, int nChar){
  unsigned int c = 1;
  char const *z = zIn;
  int n = 0;
  if( SQLITE_UTF16NATIVE==SQLITE_UTF16BE ){
    /* Using an "if (SQLITE_UTF16NATIVE==SQLITE_UTF16BE)" construct here
    ** and in other parts of this file means that at one branch will
    ** not be covered by coverage testing on any single host. But coverage
................................................................................
**
** This has the effect of making sure that the string is well-formed
** UTF-8.  Miscoded characters are removed.
**
** The translation is done in-place (since it is impossible for the
** correct UTF-8 encoding to be longer than a malformed encoding).
*/
static int sqlite3Utf8To8(unsigned char *zIn){
  unsigned char *zOut = zIn;
  unsigned char *zStart = zIn;
  int c;

  while(1){
    SQLITE_READ_UTF8(zIn, c);
    if( c==0 ) break;
................................................................................

#if defined(SQLITE_TEST)
/*
** This routine is called from the TCL test function "translate_selftest".
** It checks that the primitives for serializing and deserializing
** characters in each encoding are inverses of each other.
*/
static void sqlite3UtfSelfTest(){
  unsigned int i, t;
  unsigned char zBuf[20];
  unsigned char *z;
  int n;
  unsigned int c;

  for(i=0; i<0x00110000; i++){
................................................................................
**
*************************************************************************
** Utility functions used throughout sqlite.
**
** This file contains functions for allocating memory, comparing
** strings, and stuff like that.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/


/*
** Set the most recent error code and error string for the sqlite
** handle "db". The error code is set to "err_code".
**
................................................................................
** zFormat and any string tokens that follow it are assumed to be
** encoded in UTF-8.
**
** To clear the most recent error for sqlite handle "db", sqlite3Error
** should be called with err_code set to SQLITE_OK and zFormat set
** to NULL.
*/
static void sqlite3Error(sqlite3 *db, int err_code, const char *zFormat, ...){
  if( db && (db->pErr || (db->pErr = sqlite3ValueNew())!=0) ){
    db->errCode = err_code;
    if( zFormat ){
      char *z;
      va_list ap;
      va_start(ap, zFormat);
      z = sqlite3VMPrintf(zFormat, ap);
................................................................................
** This function should be used to report any error that occurs whilst
** compiling an SQL statement (i.e. within sqlite3_prepare()). The
** last thing the sqlite3_prepare() function does is copy the error
** stored by this function into the database handle using sqlite3Error().
** Function sqlite3Error() should be used during statement execution
** (sqlite3_step() etc.).
*/
static void sqlite3ErrorMsg(Parse *pParse, const char *zFormat, ...){
  va_list ap;
  pParse->nErr++;
  sqliteFree(pParse->zErrMsg);
  va_start(ap, zFormat);
  pParse->zErrMsg = sqlite3VMPrintf(zFormat, ap);
  va_end(ap);
  if( pParse->rc==SQLITE_OK ){
................................................................................
    pParse->rc = SQLITE_ERROR;
  }
}

/*
** Clear the error message in pParse, if any
*/
static void sqlite3ErrorClear(Parse *pParse){
  sqliteFree(pParse->zErrMsg);
  pParse->zErrMsg = 0;
  pParse->nErr = 0;
}

/*
** Convert an SQL-style quoted string into a normal string by removing
................................................................................
** input does not begin with a quote character, then this routine
** is a no-op.
**
** 2002-Feb-14: This routine is extended to remove MS-Access style
** brackets from around identifers.  For example:  "[a-b-c]" becomes
** "a-b-c".
*/
static void sqlite3Dequote(char *z){
  int quote;
  int i, j;
  if( z==0 ) return;
  quote = z[0];
  switch( quote ){
    case '\'':  break;
    case '"':   break;
................................................................................
};
#define UpperToLower sqlite3UpperToLower

/*
** Some systems have stricmp().  Others have strcasecmp().  Because
** there is no consistency, we will define our own.
*/
static int sqlite3StrICmp(const char *zLeft, const char *zRight){
  register unsigned char *a, *b;
  a = (unsigned char *)zLeft;
  b = (unsigned char *)zRight;
  while( *a!=0 && UpperToLower[*a]==UpperToLower[*b]){ a++; b++; }
  return UpperToLower[*a] - UpperToLower[*b];
}
static int sqlite3StrNICmp(const char *zLeft, const char *zRight, int N){
  register unsigned char *a, *b;
  a = (unsigned char *)zLeft;
  b = (unsigned char *)zRight;
  while( N-- > 0 && *a!=0 && UpperToLower[*a]==UpperToLower[*b]){ a++; b++; }
  return N<0 ? 0 : UpperToLower[*a] - UpperToLower[*b];
}

................................................................................
** Return TRUE if z is a pure numeric string.  Return FALSE if the
** string contains any character which is not part of a number. If
** the string is numeric and contains the '.' character, set *realnum
** to TRUE (otherwise FALSE).
**
** An empty string is considered non-numeric.
*/
static int sqlite3IsNumber(const char *z, int *realnum, u8 enc){
  int incr = (enc==SQLITE_UTF8?1:2);
  if( enc==SQLITE_UTF16BE ) z++;
  if( *z=='-' || *z=='+' ) z += incr;
  if( !isdigit(*(u8*)z) ){
    return 0;
  }
  z += incr;
................................................................................
** is not, the result is undefined.
**
** This routine is used instead of the library atof() function because
** the library atof() might want to use "," as the decimal point instead
** of "." depending on how locale is set.  But that would cause problems
** for SQL.  So this routine always uses "." regardless of locale.
*/
static int sqlite3AtoF(const char *z, double *pResult){
#ifndef SQLITE_OMIT_FLOATING_POINT
  int sign = 1;
  const char *zBegin = z;
  LONGDOUBLE_TYPE v1 = 0.0;
  while( isspace(*(u8*)z) ) z++;
  if( *z=='-' ){
    sign = -1;
................................................................................
  }
  *pResult = sign<0 ? -v1 : v1;
  return z - zBegin;
#else
  return sqlite3Atoi64(z, pResult);
#endif /* SQLITE_OMIT_FLOATING_POINT */
}
























/*
** Return TRUE if zNum is a 64-bit signed integer and write
** the value of the integer into *pNum.  If zNum is not an integer
** or is an integer that is too large to be expressed with 64 bits,
** then return false.  If n>0 and the integer is string is not
** exactly n bytes long, return false.
**
** When this routine was originally written it dealt with only
** 32-bit numbers.  At that time, it was much faster than the
** atoi() library routine in RedHat 7.2.
*/
static int sqlite3Atoi64(const char *zNum, i64 *pNum){
  i64 v = 0;
  int neg;
  int i, c;
  while( isspace(*(u8*)zNum) ) zNum++;
  if( *zNum=='-' ){
    neg = 1;
    zNum++;
  }else if( *zNum=='+' ){
    neg = 0;
    zNum++;
  }else{
    neg = 0;
  }

  for(i=0; (c=zNum[i])>='0' && c<='9'; i++){
    v = v*10 + c - '0';
  }
  *pNum = neg ? -v : v;



  return c==0 && i>0 && 
      (i<19 || (i==19 && memcmp(zNum,"9223372036854775807",19)<=0));
}

/*
** The string zNum represents an integer.  There might be some other
** information following the integer too, but that part is ignored.
** If the integer that the prefix of zNum represents will fit in a
** 32-bit signed integer, return TRUE.  Otherwise return FALSE.
**
** This routine returns FALSE for the string -2147483648 even that
** that number will in fact fit in a 32-bit integer.  But positive
** 2147483648 will not fit in 32 bits.  So it seems safer to return
** false.
*/
static int sqlite3FitsIn32Bits(const char *zNum){
  int i, c;
  if( *zNum=='-' || *zNum=='+' ) zNum++;
  for(i=0; (c=zNum[i])>='0' && c<='9'; i++){}
  return i<10 || (i==10 && memcmp(zNum,"2147483647",10)<=0);
}

/*
** If zNum represents an integer that will fit in 32-bits, then set
** *pValue to that integer and return true.  Otherwise return false.
*/
static int sqlite3GetInt32(const char *zNum, int *pValue){
  if( sqlite3FitsIn32Bits(zNum) ){
    *pValue = atoi(zNum);
    return 1;





  }
  return 0;
}

/*
** The string zNum represents an integer.  There might be some other
** information following the integer too, but that part is ignored.
** If the integer that the prefix of zNum represents will fit in a
** 64-bit signed integer, return TRUE.  Otherwise return FALSE.
**
** This routine returns FALSE for the string -9223372036854775808 even that
** that number will, in theory fit in a 64-bit integer.  Positive
** 9223373036854775808 will not fit in 64 bits.  So it seems safer to return
** false.
*/
static int sqlite3FitsIn64Bits(const char *zNum){
  int i, c;

  if( *zNum=='-' || *zNum=='+' ) zNum++;








  for(i=0; (c=zNum[i])>='0' && c<='9'; i++){}
  return i<19 || (i==19 && memcmp(zNum,"9223372036854775807",19)<=0);









}





































/*
** Check to make sure we have a valid db pointer.  This test is not
** foolproof but it does provide some measure of protection against
** misuse of the interface such as passing in db pointers that are
** NULL or which have been previously closed.  If this routine returns
** TRUE it means that the db pointer is invalid and should not be
** dereferenced for any reason.  The calling function should invoke
** SQLITE_MISUSE immediately.
*/
static int sqlite3SafetyCheck(sqlite3 *db){
  int magic;
  if( db==0 ) return 1;
  magic = db->magic;
  if( magic!=SQLITE_MAGIC_CLOSED &&
         magic!=SQLITE_MAGIC_OPEN &&
         magic!=SQLITE_MAGIC_BUSY ) return 1;
  return 0;
................................................................................
** of bytes written is returned.
**
** A variable-length integer consists of the lower 7 bits of each byte
** for all bytes that have the 8th bit set and one byte with the 8th
** bit clear.  Except, if we get to the 9th byte, it stores the full
** 8 bits and is the last byte.
*/
static int sqlite3PutVarint(unsigned char *p, u64 v){
  int i, j, n;
  u8 buf[10];
  if( v & (((u64)0xff000000)<<32) ){
    p[8] = v;
    v >>= 8;
    for(i=7; i>=0; i--){
      p[i] = (v & 0x7f) | 0x80;
................................................................................
  return n;
}

/*
** Read a 64-bit variable-length integer from memory starting at p[0].
** Return the number of bytes read.  The value is stored in *v.
*/
static int sqlite3GetVarint(const unsigned char *p, u64 *v){
  u32 x;
  u64 x64;
  int n;
  unsigned char c;
  if( ((c = p[0]) & 0x80)==0 ){
    *v = c;
    return 1;
................................................................................
  return n;
}

/*
** Read a 32-bit variable-length integer from memory starting at p[0].
** Return the number of bytes read.  The value is stored in *v.
*/
static int sqlite3GetVarint32(const unsigned char *p, u32 *v){
  u32 x;
  int n;
  unsigned char c;
  if( ((signed char*)p)[0]>=0 ){
    *v = p[0];
    return 1;
  }
................................................................................
  return n;
}

/*
** Return the number of bytes that will be needed to store the given
** 64-bit integer.
*/
static int sqlite3VarintLen(u64 v){
  int i = 0;
  do{
    i++;
    v >>= 7;
  }while( v!=0 && i<9 );
  return i;
}


/*
** Read or write a four-byte big-endian integer value.
*/
static u32 sqlite3Get4byte(const u8 *p){
  return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
}
static void sqlite3Put4byte(unsigned char *p, u32 v){
  p[0] = v>>24;
  p[1] = v>>16;
  p[2] = v>>8;
  p[3] = v;
}


................................................................................
#if !defined(SQLITE_OMIT_BLOB_LITERAL) || defined(SQLITE_HAS_CODEC)
/*
** Convert a BLOB literal of the form "x'hhhhhh'" into its binary
** value.  Return a pointer to its binary value.  Space to hold the
** binary value has been obtained from malloc and must be freed by
** the calling routine.
*/
static void *sqlite3HexToBlob(const char *z){
  char *zBlob;
  int i;
  int n = strlen(z);
  if( n%2 ) return 0;

  zBlob = (char *)sqliteMalloc(n/2);
  if( zBlob ){
................................................................................
**
** Ticket #202:  If db->magic is not a valid open value, take care not
** to modify the db structure at all.  It could be that db is a stale
** pointer.  In other words, it could be that there has been a prior
** call to sqlite3_close(db) and db has been deallocated.  And we do
** not want to write into deallocated memory.
*/
static int sqlite3SafetyOn(sqlite3 *db){
  if( db->magic==SQLITE_MAGIC_OPEN ){
    db->magic = SQLITE_MAGIC_BUSY;
    return 0;
  }else if( db->magic==SQLITE_MAGIC_BUSY ){
    db->magic = SQLITE_MAGIC_ERROR;
    db->u1.isInterrupted = 1;
  }
................................................................................
}

/*
** Change the magic from SQLITE_MAGIC_BUSY to SQLITE_MAGIC_OPEN.
** Return an error (non-zero) if the magic was not SQLITE_MAGIC_BUSY
** when this routine is called.
*/
static int sqlite3SafetyOff(sqlite3 *db){
  if( db->magic==SQLITE_MAGIC_BUSY ){
    db->magic = SQLITE_MAGIC_OPEN;
    return 0;
  }else {
    db->magic = SQLITE_MAGIC_ERROR;
    db->u1.isInterrupted = 1;
    return 1;
  }
}

/*
** Return a pointer to the ThreadData associated with the calling thread.
*/
static ThreadData *sqlite3ThreadData(){
  ThreadData *p = (ThreadData*)sqlite3OsThreadSpecificData(1);
  if( !p ){
    sqlite3FailedMalloc();
  }
  return p;
}

/*
** Return a pointer to the ThreadData associated with the calling thread.
** If no ThreadData has been allocated to this thread yet, return a pointer
** to a substitute ThreadData structure that is all zeros. 
*/
static const ThreadData *sqlite3ThreadDataReadOnly(){
  static const ThreadData zeroData = {0};  /* Initializer to silence warnings
                                           ** from broken compilers */
  const ThreadData *pTd = sqlite3OsThreadSpecificData(0);
  return pTd ? pTd : &zeroData;
}

/*
** Check to see if the ThreadData for this thread is all zero.  If it
** is, then deallocate it. 
*/
static void sqlite3ReleaseThreadData(){
  sqlite3OsThreadSpecificData(-1);
}

/************** End of util.c ************************************************/
/************** Begin file hash.c ********************************************/
/*
** 2001 September 22
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This is the implementation of generic hash-tables
** used in SQLite.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/* Turn bulk memory into a hash table object by initializing the
** fields of the Hash structure.
**
** "pNew" is a pointer to the hash table that is to be initialized.
** keyClass is one of the constants SQLITE_HASH_INT, SQLITE_HASH_POINTER,
................................................................................
** SQLITE_HASH_BINARY, or SQLITE_HASH_STRING.  The value of keyClass 
** determines what kind of key the hash table will use.  "copyKey" is
** true if the hash table should make its own private copy of keys and
** false if it should just use the supplied pointer.  CopyKey only makes
** sense for SQLITE_HASH_STRING and SQLITE_HASH_BINARY and is ignored
** for other key classes.
*/
static void sqlite3HashInit(Hash *pNew, int keyClass, int copyKey){
  assert( pNew!=0 );
  assert( keyClass>=SQLITE_HASH_STRING && keyClass<=SQLITE_HASH_BINARY );
  pNew->keyClass = keyClass;
#if 0
  if( keyClass==SQLITE_HASH_POINTER || keyClass==SQLITE_HASH_INT ) copyKey = 0;
#endif
  pNew->copyKey = copyKey;
................................................................................
  pNew->xFree = sqlite3FreeX;
}

/* Remove all entries from a hash table.  Reclaim all memory.
** Call this routine to delete a hash table or to reset a hash table
** to the empty state.
*/
static void sqlite3HashClear(Hash *pH){
  HashElem *elem;         /* For looping over all elements of the table */

  assert( pH!=0 );
  elem = pH->first;
  pH->first = 0;
  if( pH->ht ) pH->xFree(pH->ht);
  pH->ht = 0;
................................................................................
  }
}

/* Attempt to locate an element of the hash table pH with a key
** that matches pKey,nKey.  Return the data for this element if it is
** found, or NULL if there is no match.
*/
static void *sqlite3HashFind(const Hash *pH, const void *pKey, int nKey){
  int h;             /* A hash on key */
  HashElem *elem;    /* The element that matches key */
  int (*xHash)(const void*,int);  /* The hash function */

  if( pH==0 || pH->ht==0 ) return 0;
  xHash = hashFunction(pH->keyClass);
  assert( xHash!=0 );
................................................................................
** new data replaces the old data and the old data is returned.
** The key is not copied in this instance.  If a malloc fails, then
** the new data is returned and the hash table is unchanged.
**
** If the "data" parameter to this function is NULL, then the
** element corresponding to "key" is removed from the hash table.
*/
static void *sqlite3HashInsert(Hash *pH, const void *pKey, int nKey, void *data){
  int hraw;             /* Raw hash value of the key */
  int h;                /* the hash of the key modulo hash table size */
  HashElem *elem;       /* Used to loop thru the element list */
  HashElem *new_elem;   /* New element added to the pH */
  int (*xHash)(const void*,int);  /* The hash function */

  assert( pH!=0 );
................................................................................
 /*  21 */ "Noop",
 /*  22 */ "Return",
 /*  23 */ "NewRowid",
 /*  24 */ "IfMemNeg",
 /*  25 */ "Variable",
 /*  26 */ "String",
 /*  27 */ "RealAffinity",
 /*  28 */ "ParseSchema",
 /*  29 */ "VOpen",
 /*  30 */ "Close",
 /*  31 */ "CreateIndex",
 /*  32 */ "IsUnique",
 /*  33 */ "NotFound",
 /*  34 */ "Int64",
 /*  35 */ "MustBeInt",
 /*  36 */ "Halt",
 /*  37 */ "Rowid",
 /*  38 */ "IdxLT",
 /*  39 */ "AddImm",
 /*  40 */ "Statement",
 /*  41 */ "RowData",
 /*  42 */ "MemMax",
 /*  43 */ "Push",
 /*  44 */ "NotExists",
 /*  45 */ "MemIncr",
 /*  46 */ "Gosub",
 /*  47 */ "Integer",
 /*  48 */ "MemInt",
 /*  49 */ "Prev",
 /*  50 */ "VColumn",
 /*  51 */ "CreateTable",
 /*  52 */ "Last",
 /*  53 */ "IncrVacuum",
 /*  54 */ "IdxRowid",
 /*  55 */ "MakeIdxRec",
 /*  56 */ "ResetCount",
 /*  57 */ "FifoWrite",
 /*  58 */ "Callback",
 /*  59 */ "ContextPush",
 /*  60 */ "Or",
 /*  61 */ "And",
 /*  62 */ "DropTrigger",
 /*  63 */ "DropIndex",
 /*  64 */ "IdxGE",
 /*  65 */ "IsNull",
 /*  66 */ "NotNull",
 /*  67 */ "Ne",
 /*  68 */ "Eq",
 /*  69 */ "Gt",
 /*  70 */ "Le",
 /*  71 */ "Lt",
 /*  72 */ "Ge",
 /*  73 */ "IdxDelete",
 /*  74 */ "BitAnd",
 /*  75 */ "BitOr",
 /*  76 */ "ShiftLeft",
 /*  77 */ "ShiftRight",
 /*  78 */ "Add",
 /*  79 */ "Subtract",
 /*  80 */ "Multiply",
 /*  81 */ "Divide",
 /*  82 */ "Remainder",
 /*  83 */ "Concat",
 /*  84 */ "Vacuum",
 /*  85 */ "Negative",
 /*  86 */ "MoveLe",
 /*  87 */ "BitNot",
 /*  88 */ "String8",
 /*  89 */ "IfNot",
 /*  90 */ "DropTable",
 /*  91 */ "MakeRecord",
 /*  92 */ "Delete",
 /*  93 */ "AggFinal",
 /*  94 */ "Dup",
 /*  95 */ "Goto",
 /*  96 */ "TableLock",
 /*  97 */ "FifoRead",
 /*  98 */ "Clear",
 /*  99 */ "IdxGT",
 /* 100 */ "MoveLt",
 /* 101 */ "VerifyCookie",
 /* 102 */ "AggStep",
 /* 103 */ "Pull",
 /* 104 */ "SetNumColumns",
 /* 105 */ "AbsValue",
 /* 106 */ "Transaction",
 /* 107 */ "VFilter",
 /* 108 */ "VDestroy",
 /* 109 */ "ContextPop",
 /* 110 */ "Next",
 /* 111 */ "IdxInsert",
 /* 112 */ "Distinct",
 /* 113 */ "Insert",
 /* 114 */ "Destroy",
 /* 115 */ "ReadCookie",
 /* 116 */ "ForceInt",
 /* 117 */ "LoadAnalysis",
 /* 118 */ "Explain",
 /* 119 */ "IfMemZero",
 /* 120 */ "OpenPseudo",
 /* 121 */ "OpenEphemeral",
 /* 122 */ "Null",
 /* 123 */ "Blob",
 /* 124 */ "MemStore",
 /* 125 */ "Real",
 /* 126 */ "HexBlob",
 /* 127 */ "Rewind",
 /* 128 */ "MoveGe",
 /* 129 */ "VBegin",
 /* 130 */ "VUpdate",
 /* 131 */ "VCreate",
 /* 132 */ "MemMove",
 /* 133 */ "MemNull",
 /* 134 */ "Found",
 /* 135 */ "NullRow",
 /* 136 */ "NotUsed_136",
 /* 137 */ "NotUsed_137",
 /* 138 */ "ToText",
 /* 139 */ "ToBlob",
 /* 140 */ "ToNumeric",
 /* 141 */ "ToInt",
 /* 142 */ "ToReal",
};
................................................................................
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This file contains code that is specific to OS/2.
*/

#if (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ >= 3) && defined(OS2_HIGH_MEMORY)
/* os2safe.h has to be included before os2.h, needed for high mem */
#include <os2safe.h>
#endif


#if OS_OS2

/*
** Macros used to determine whether or not to use threads.
*/
#if defined(THREADSAFE) && THREADSAFE
................................................................................
** enabled. This version allocates an extra 8-bytes at the beginning of each
** block and stores the size of the allocation there.
**
** If neither memory-management or debugging is enabled, the second
** set of implementations is used instead.
*/
#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) || defined (SQLITE_MEMDEBUG)
static void *sqlite3GenericMalloc(int n){
  char *p = (char *)malloc(n+8);
  assert(n>0);
  assert(sizeof(int)<=8);
  if( p ){
    *(int *)p = n;
    p += 8;
  }
  return (void *)p;
}
static void *sqlite3GenericRealloc(void *p, int n){
  char *p2 = ((char *)p - 8);
  assert(n>0);
  p2 = (char*)realloc(p2, n+8);
  if( p2 ){
    *(int *)p2 = n;
    p2 += 8;
  }
  return (void *)p2;
}
static void sqlite3GenericFree(void *p){
  assert(p);
  free((void *)((char *)p - 8));
}
static int sqlite3GenericAllocationSize(void *p){
  return p ? *(int *)((char *)p - 8) : 0;
}
#else
static void *sqlite3GenericMalloc(int n){
  char *p = (char *)malloc(n);
  return (void *)p;
}
static void *sqlite3GenericRealloc(void *p, int n){
  assert(n>0);
  p = realloc(p, n);
  return p;
}
static void sqlite3GenericFree(void *p){
  assert(p);
  free(p);
}
/* Never actually used, but needed for the linker */
static int sqlite3GenericAllocationSize(void *p){ return 0; }
#endif

/*
** The default size of a disk sector
*/
#ifndef PAGER_SECTOR_SIZE
# define PAGER_SECTOR_SIZE 512
................................................................................
** will be in-memory only)
*/
#ifndef SQLITE_OMIT_DISKIO

/*
** Delete the named file
*/
static int sqlite3Os2Delete( const char *zFilename ){
  APIRET rc = NO_ERROR;

  rc = DosDelete( (PSZ)zFilename );
  OSTRACE2( "DELETE \"%s\"\n", zFilename );
  return rc == NO_ERROR ? SQLITE_OK : SQLITE_IOERR;
}

/*
** Return TRUE if the named file exists.
*/
static int sqlite3Os2FileExists( const char *zFilename ){
  FILESTATUS3 fsts3ConfigInfo;
  memset(&fsts3ConfigInfo, 0, sizeof(fsts3ConfigInfo));
  return DosQueryPathInfo( (PSZ)zFilename, FIL_STANDARD,
        &fsts3ConfigInfo, sizeof(FILESTATUS3) ) == NO_ERROR;
}

/* Forward declaration */
................................................................................
** and *pReadonly is set to 0 if the file was opened for reading and
** writing or 1 if the file was opened read-only.  The function returns
** SQLITE_OK.
**
** On failure, the function returns SQLITE_CANTOPEN and leaves
** *id and *pReadonly unchanged.
*/
static int sqlite3Os2OpenReadWrite(
  const char *zFilename,
  OsFile **pld,
  int *pReadonly
){
  os2File  f;
  HFILE    hf;
  ULONG    ulAction;
................................................................................
** If delFlag is true, then make arrangements to automatically delete
** the file when it is closed.
**
** On success, write the file handle into *id and return SQLITE_OK.
**
** On failure, return SQLITE_CANTOPEN.
*/
static int sqlite3Os2OpenExclusive( const char *zFilename, OsFile **pld, int delFlag ){
  os2File  f;
  HFILE    hf;
  ULONG    ulAction;
  APIRET   rc = NO_ERROR;

  assert( *pld == 0 );
  rc = DosOpen( (PSZ)zFilename, &hf, &ulAction, 0L, FILE_NORMAL,
................................................................................
  }

  f.h = hf;
  f.locktype = NO_LOCK;
  f.delOnClose = delFlag ? 1 : 0;
  f.pathToDel = delFlag ? sqlite3OsFullPathname( zFilename ) : NULL;
  OpenCounter( +1 );
  if( delFlag ) DosForceDelete( sqlite3OsFullPathname( zFilename ) );
  OSTRACE3( "OPEN EX %d \"%s\"\n", hf, sqlite3OsFullPathname ( zFilename ) );
  return allocateOs2File( &f, pld );
}

/*
** Attempt to open a new file for read-only access.
**
** On success, write the file handle into *id and return SQLITE_OK.
**
** On failure, return SQLITE_CANTOPEN.
*/
static int sqlite3Os2OpenReadOnly( const char *zFilename, OsFile **pld ){
  os2File  f;
  HFILE    hf;
  ULONG    ulAction;
  APIRET   rc = NO_ERROR;

  assert( *pld == 0 );
  rc = DosOpen( (PSZ)zFilename, &hf, &ulAction, 0L,
................................................................................
  return SQLITE_OK;
}

/*
** Create a temporary file name in zBuf.  zBuf must be big enough to
** hold at least SQLITE_TEMPNAME_SIZE characters.
*/
static int sqlite3Os2TempFileName( char *zBuf ){
  static const unsigned char zChars[] =
    "abcdefghijklmnopqrstuvwxyz"
    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    "0123456789";
  int i, j;
  PSZ zTempPath = 0;
  if( DosScanEnv( "TEMP", &zTempPath ) ){
    if( DosScanEnv( "TMP", &zTempPath ) ){
      if( DosScanEnv( "TMPDIR", &zTempPath ) ){
           ULONG ulDriveNum = 0, ulDriveMap = 0;
           DosQueryCurrentDisk( &ulDriveNum, &ulDriveMap );
           sprintf( zTempPath, "%c:", (char)( 'A' + ulDriveNum - 1 ) );
      }
    }
  }
  for(;;){
      sprintf( zBuf, "%s\\"TEMP_FILE_PREFIX, zTempPath );
      j = strlen( zBuf );
      sqlite3Randomness( 15, &zBuf[j] );
................................................................................
  os2File *pFile;
  APIRET rc = NO_ERROR;
  if( pld && (pFile = (os2File*)*pld) != 0 ){
    OSTRACE2( "CLOSE %d\n", pFile->h );
    rc = DosClose( pFile->h );
    pFile->locktype = NO_LOCK;
    if( pFile->delOnClose != 0 ){
        rc = DosForceDelete( pFile->pathToDel );
    }
    *pld = 0;
    OpenCounter( -1 );
  }

  return rc == NO_ERROR ? SQLITE_OK : SQLITE_IOERR;
}
................................................................................
  ULONG got;
  assert( id!=0 );
  SimulateIOError( return SQLITE_IOERR );
  OSTRACE3( "READ %d lock=%d\n", ((os2File*)id)->h, ((os2File*)id)->locktype );
  DosRead( ((os2File*)id)->h, pBuf, amt, &got );
  if (got == (ULONG)amt)
    return SQLITE_OK;
  else if (got < 0)
    return SQLITE_IOERR_READ;
  else {
    memset(&((char*)pBuf)[got], 0, amt-got);
    return SQLITE_IOERR_SHORT_READ;
  }
}

................................................................................
  return DosResetBuffer( ((os2File*)id)->h ) == NO_ERROR ? SQLITE_OK : SQLITE_IOERR;
}

/*
** Sync the directory zDirname. This is a no-op on operating systems other
** than UNIX.
*/
static int sqlite3Os2SyncDirectory( const char *zDirname ){
  SimulateIOError( return SQLITE_IOERR );
  return SQLITE_OK;
}

/*
** Truncate an open file to a specified size
*/
................................................................................
}

#ifndef SQLITE_OMIT_PAGER_PRAGMAS
/*
** Check that a given pathname is a directory and is writable
**
*/
static int sqlite3Os2IsDirWritable( char *zDirname ){
  FILESTATUS3 fsts3ConfigInfo;
  APIRET rc = NO_ERROR;
  memset(&fsts3ConfigInfo, 0, sizeof(fsts3ConfigInfo));
  if( zDirname==0 ) return 0;
  if( strlen(zDirname)>CCHMAXPATH ) return 0;
  rc = DosQueryPathInfo( (PSZ)zDirname, FIL_STANDARD, &fsts3ConfigInfo, sizeof(FILESTATUS3) );
  if( rc != NO_ERROR ) return 0;
................................................................................

/*
** Turn a relative pathname into a full pathname.  Return a pointer
** to the full pathname stored in space obtained from sqliteMalloc().
** The calling function is responsible for freeing this space once it
** is no longer needed.
*/
static char *sqlite3Os2FullPathname( const char *zRelative ){
  char *zFull = 0;
  if( strchr(zRelative, ':') ){
    sqlite3SetString( &zFull, zRelative, (char*)0 );
  }else{
    char zBuff[SQLITE_TEMPNAME_SIZE - 2] = {0};
    char zDrive[1] = {0};
    ULONG cbzFullLen = SQLITE_TEMPNAME_SIZE;
    ULONG ulDriveNum = 0;
    ULONG ulDriveMap = 0;






    DosQueryCurrentDisk( &ulDriveNum, &ulDriveMap );
    DosQueryCurrentDir( 0L, zBuff, &cbzFullLen );
    zFull = sqliteMalloc( cbzFullLen );

    sprintf( zDrive, "%c", (char)('A' + ulDriveNum - 1) );
    sqlite3SetString( &zFull, zDrive, ":\\", zBuff, "\\", zRelative, (char*)0 );




  }
  return zFull;
}

/*
** The fullSync option is meaningless on os2, or correct me if I'm wrong.  This is a no-op.
** From os_unix.c: Change the value of the fullsync flag in the given file descriptor.
................................................................................
****************************************************************************/

#ifndef SQLITE_OMIT_LOAD_EXTENSION
/*
** Interfaces for opening a shared library, finding entry points
** within the shared library, and closing the shared library.
*/
static void *sqlite3Os2Dlopen(const char *zFilename){
  UCHAR loadErr[256];
  HMODULE hmod;
  APIRET rc;
  rc = DosLoadModule(loadErr, sizeof(loadErr), zFilename, &hmod);
  if (rc != NO_ERROR) return 0;
  return (void*)hmod;
}
static void *sqlite3Os2Dlsym(void *pHandle, const char *zSymbol){
  PFN pfn;
  APIRET rc;
  rc = DosQueryProcAddr((HMODULE)pHandle, 0L, zSymbol, &pfn);
  if (rc != NO_ERROR) {
    /* if the symbol itself was not found, search again for the same
     * symbol with an extra underscore, that might be needed depending
     * on the calling convention */
    char _zSymbol[256] = "_";
    strncat(_zSymbol, zSymbol, 255);
    rc = DosQueryProcAddr((HMODULE)pHandle, 0L, _zSymbol, &pfn);
  }
  if (rc != NO_ERROR) return 0;
  return pfn;
}
static int sqlite3Os2Dlclose(void *pHandle){
  return DosFreeModule((HMODULE)pHandle);
}
#endif /* SQLITE_OMIT_LOAD_EXTENSION */


/*
** Get information to seed the random number generator.  The seed
** is written into the buffer zBuf[256].  The calling function must
** supply a sufficiently large buffer.
*/
static int sqlite3Os2RandomSeed( char *zBuf ){
  /* We have to initialize zBuf to prevent valgrind from reporting
  ** errors.  The reports issued by valgrind are incorrect - we would
  ** prefer that the randomness be increased by making use of the
  ** uninitialized space in zBuf - but valgrind errors tend to worry
  ** some users.  Rather than argue, it seems easier just to initialize
  ** the whole array and silence valgrind, even if that means less randomness
  ** in the random seed.
................................................................................
  DosGetDateTime( (PDATETIME)zBuf );
  return SQLITE_OK;
}

/*
** Sleep for a little while.  Return the amount of time slept.
*/
static int sqlite3Os2Sleep( int ms ){
  DosSleep( ms );
  return ms;
}

/*
** Static variables used for thread synchronization
*/
................................................................................
** The following pair of routines implement mutual exclusion for
** multi-threaded processes.  Only a single thread is allowed to
** executed code that is surrounded by EnterMutex() and LeaveMutex().
**
** SQLite uses only a single Mutex.  There is not much critical
** code and what little there is executes quickly and without blocking.
*/
static void sqlite3Os2EnterMutex(){
  PTIB ptib;
#ifdef SQLITE_OS2_THREADS

  DosEnterCritSec();
  DosGetInfoBlocks( &ptib, NULL );
  mutexOwner = ptib->tib_ptib2->tib2_ultid;
#endif
  assert( !inMutex );
  inMutex = 1;
}
static void sqlite3Os2LeaveMutex(){

  PTIB ptib;

  assert( inMutex );
  inMutex = 0;
#ifdef SQLITE_OS2_THREADS
  DosGetInfoBlocks( &ptib, NULL );
  assert( mutexOwner == ptib->tib_ptib2->tib2_ultid );
  DosExitCritSec();
#endif
................................................................................
/*
** Return TRUE if the mutex is currently held.
**
** If the thisThreadOnly parameter is true, return true if and only if the
** calling thread holds the mutex.  If the parameter is false, return
** true if any thread holds the mutex.
*/
static int sqlite3Os2InMutex( int thisThreadOnly ){
#ifdef SQLITE_OS2_THREADS
  PTIB ptib;
  DosGetInfoBlocks( &ptib, NULL );
  return inMutex>0 && (thisThreadOnly==0 || mutexOwner==ptib->tib_ptib2->tib2_ultid);
#else
  return inMutex>0;
#endif
................................................................................
#endif

/*
** Find the current time (in Universal Coordinated Time).  Write the
** current time and date as a Julian Day number into *prNow and
** return 0.  Return 1 if the time and date cannot be found.
*/
static int sqlite3Os2CurrentTime( double *prNow ){
  double now;
  USHORT second, minute, hour,
         day, month, year;
  DATETIME dt;
  DosGetDateTime( &dt );
  second = (USHORT)dt.seconds;
  minute = (USHORT)dt.minutes + dt.timezone;
................................................................................
** then return NULL.
**
** If called with allocateFlag<0, check to see if the thread specific
** data is allocated and is all zero.  If it is then deallocate it.
** Return a pointer to the thread specific data or NULL if it is
** unallocated or gets deallocated.
*/
static ThreadData *sqlite3Os2ThreadSpecificData( int allocateFlag ){
  static ThreadData **s_ppTsd = NULL;
  static const ThreadData zeroData = {0, 0, 0};
  ThreadData *pTsd;

  if( !s_ppTsd ){
    sqlite3OsEnterMutex();
    if( !s_ppTsd ){
................................................................................
** enabled. This version allocates an extra 8-bytes at the beginning of each
** block and stores the size of the allocation there.
**
** If neither memory-management or debugging is enabled, the second
** set of implementations is used instead.
*/
#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) || defined (SQLITE_MEMDEBUG)
static void *sqlite3GenericMalloc(int n){
  char *p = (char *)malloc(n+8);
  assert(n>0);
  assert(sizeof(int)<=8);
  if( p ){
    *(int *)p = n;
    p += 8;
  }
  return (void *)p;
}
static void *sqlite3GenericRealloc(void *p, int n){
  char *p2 = ((char *)p - 8);
  assert(n>0);
  p2 = (char*)realloc(p2, n+8);
  if( p2 ){
    *(int *)p2 = n;
    p2 += 8;
  }
  return (void *)p2;
}
static void sqlite3GenericFree(void *p){
  assert(p);
  free((void *)((char *)p - 8));
}
static int sqlite3GenericAllocationSize(void *p){
  return p ? *(int *)((char *)p - 8) : 0;
}
#else
static void *sqlite3GenericMalloc(int n){
  char *p = (char *)malloc(n);
  return (void *)p;
}
static void *sqlite3GenericRealloc(void *p, int n){
  assert(n>0);
  p = realloc(p, n);
  return p;
}
static void sqlite3GenericFree(void *p){
  assert(p);
  free(p);
}
/* Never actually used, but needed for the linker */
static int sqlite3GenericAllocationSize(void *p){ return 0; }
#endif

/*
** The default size of a disk sector
*/
#ifndef PAGER_SECTOR_SIZE
# define PAGER_SECTOR_SIZE 512
................................................................................
  /* On single-threaded builds, ownership transfer is a no-op */
# define transferOwnership(X) SQLITE_OK
#endif

/*
** Delete the named file
*/
static int sqlite3UnixDelete(const char *zFilename){
  SimulateIOError(return SQLITE_IOERR_DELETE);
  unlink(zFilename);
  return SQLITE_OK;
}

/*
** Return TRUE if the named file exists.
*/
static int sqlite3UnixFileExists(const char *zFilename){
  return access(zFilename, 0)==0;
}

/* Forward declaration */
static int allocateUnixFile(
  int h,                    /* File descriptor of the open file */
  OsFile **pId,             /* Write the real file descriptor here */
................................................................................
** and *pReadonly is set to 0 if the file was opened for reading and
** writing or 1 if the file was opened read-only.  The function returns
** SQLITE_OK.
**
** On failure, the function returns SQLITE_CANTOPEN and leaves
** *id and *pReadonly unchanged.
*/
static int sqlite3UnixOpenReadWrite(
  const char *zFilename,
  OsFile **pId,
  int *pReadonly
){
  int h;
  
  CRASH_TEST_OVERRIDE(sqlite3CrashOpenReadWrite, zFilename, pId, pReadonly);
................................................................................
** If delFlag is true, then make arrangements to automatically delete
** the file when it is closed.
**
** On success, write the file handle into *id and return SQLITE_OK.
**
** On failure, return SQLITE_CANTOPEN.
*/
static int sqlite3UnixOpenExclusive(const char *zFilename, OsFile **pId, int delFlag){
  int h;

  CRASH_TEST_OVERRIDE(sqlite3CrashOpenExclusive, zFilename, pId, delFlag);
  assert( 0==*pId );
  h = open(zFilename,
                O_RDWR|O_CREAT|O_EXCL|O_NOFOLLOW|O_LARGEFILE|O_BINARY,
                delFlag ? 0600 : SQLITE_DEFAULT_FILE_PERMISSIONS);
................................................................................
/*
** Attempt to open a new file for read-only access.
**
** On success, write the file handle into *id and return SQLITE_OK.
**
** On failure, return SQLITE_CANTOPEN.
*/
static int sqlite3UnixOpenReadOnly(const char *zFilename, OsFile **pId){
  int h;
  
  CRASH_TEST_OVERRIDE(sqlite3CrashOpenReadOnly, zFilename, pId, 0);
  assert( 0==*pId );
  h = open(zFilename, O_RDONLY|O_LARGEFILE|O_BINARY);
  if( h<0 ){
    return SQLITE_CANTOPEN;
................................................................................
** On failure, the function returns SQLITE_CANTOPEN and leaves
** *id unchanged.
*/
static int unixOpenDirectory(
  OsFile *id,
  const char *zDirname
){

  unixFile *pFile = (unixFile*)id;
  assert( pFile!=0 );
  SET_THREADID(pFile);
  assert( pFile->dirfd<0 );
  pFile->dirfd = open(zDirname, O_RDONLY|O_BINARY, 0);
  if( pFile->dirfd<0 ){
    return SQLITE_CANTOPEN; 
  }



  OSTRACE3("OPENDIR %-3d %s\n", pFile->dirfd, zDirname);
  return SQLITE_OK;
}

/*
** Create a temporary file name in zBuf.  zBuf must be big enough to
** hold at least SQLITE_TEMPNAME_SIZE characters.
*/
static int sqlite3UnixTempFileName(char *zBuf){
  static const char *azDirs[] = {
     0,
     "/var/tmp",
     "/usr/tmp",
     "/tmp",
     ".",
  };
................................................................................
  return SQLITE_OK; 
}

/*
** Check that a given pathname is a directory and is writable 
**
*/
static int sqlite3UnixIsDirWritable(char *zBuf){
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
  struct stat buf;
  if( zBuf==0 ) return 0;
  if( zBuf[0]==0 ) return 0;
  if( stat(zBuf, &buf) ) return 0;
  if( !S_ISDIR(buf.st_mode) ) return 0;
  if( access(zBuf, 07) ) return 0;
................................................................................
** Sync the directory zDirname. This is a no-op on operating systems other
** than UNIX.
**
** This is used to make sure the master journal file has truely been deleted
** before making changes to individual journals on a multi-database commit.
** The F_FULLFSYNC option is not needed here.
*/
static int sqlite3UnixSyncDirectory(const char *zDirname){
#ifdef SQLITE_DISABLE_DIRSYNC
  return SQLITE_OK;
#else
  int fd;
  int r;
  fd = open(zDirname, O_RDONLY|O_BINARY, 0);
  OSTRACE3("DIRSYNC %-3d (%s)\n", fd, zDirname);
................................................................................

/*
** Truncate an open file to a specified size
*/
static int unixTruncate(OsFile *id, i64 nByte){
  int rc;
  assert( id );
  rc = ftruncate(((unixFile*)id)->h, nByte);
  SimulateIOError( rc=1 );
  if( rc ){
    return SQLITE_IOERR_TRUNCATE;
  }else{
    return SQLITE_OK;
  }
}
................................................................................

/*
** Turn a relative pathname into a full pathname.  Return a pointer
** to the full pathname stored in space obtained from sqliteMalloc().
** The calling function is responsible for freeing this space once it
** is no longer needed.
*/
static char *sqlite3UnixFullPathname(const char *zRelative){
  char *zFull = 0;
  if( zRelative[0]=='/' ){
    sqlite3SetString(&zFull, zRelative, (char*)0);
  }else{
    char *zBuf = sqliteMalloc(5000);
    if( zBuf==0 ){
      return 0;
................................................................................
  const char *zFilename, /* Name of the file being opened */
  int delFlag            /* If true, delete the file on or before closing */
){
  unixFile *pNew;
  unixFile f;
  int rc;




  memset(&f, 0, sizeof(f));
  sqlite3OsEnterMutex();
  rc = findLockInfo(h, &f.pLock, &f.pOpen);
  sqlite3OsLeaveMutex();
  if( delFlag ){
    unlink(zFilename);
  }
................................................................................

#ifndef SQLITE_OMIT_LOAD_EXTENSION
/*
** Interfaces for opening a shared library, finding entry points
** within the shared library, and closing the shared library.
*/
#include <dlfcn.h>
static void *sqlite3UnixDlopen(const char *zFilename){
  return dlopen(zFilename, RTLD_NOW | RTLD_GLOBAL);
}
static void *sqlite3UnixDlsym(void *pHandle, const char *zSymbol){
  return dlsym(pHandle, zSymbol);
}
static int sqlite3UnixDlclose(void *pHandle){
  return dlclose(pHandle);
}
#endif /* SQLITE_OMIT_LOAD_EXTENSION */

/*
** Get information to seed the random number generator.  The seed
** is written into the buffer zBuf[256].  The calling function must
** supply a sufficiently large buffer.
*/
static int sqlite3UnixRandomSeed(char *zBuf){
  /* We have to initialize zBuf to prevent valgrind from reporting
  ** errors.  The reports issued by valgrind are incorrect - we would
  ** prefer that the randomness be increased by making use of the
  ** uninitialized space in zBuf - but valgrind errors tend to worry
  ** some users.  Rather than argue, it seems easier just to initialize
  ** the whole array and silence valgrind, even if that means less randomness
  ** in the random seed.
................................................................................
  return SQLITE_OK;
}

/*
** Sleep for a little while.  Return the amount of time slept.
** The argument is the number of milliseconds we want to sleep.
*/
static int sqlite3UnixSleep(int ms){
#if defined(HAVE_USLEEP) && HAVE_USLEEP
  usleep(ms*1000);
  return ms;
#else
  sleep((ms+999)/1000);
  return 1000*((ms+999)/1000);
#endif
................................................................................
** executed code that is surrounded by EnterMutex() and LeaveMutex().
**
** SQLite uses only a single Mutex.  There is not much critical
** code and what little there is executes quickly and without blocking.
**
** As of version 3.3.2, this mutex must be recursive.
*/
static void sqlite3UnixEnterMutex(){
#ifdef SQLITE_UNIX_THREADS
  pthread_mutex_lock(&mutexAux);
  if( !mutexOwnerValid || !pthread_equal(mutexOwner, pthread_self()) ){
    pthread_mutex_unlock(&mutexAux);
    pthread_mutex_lock(&mutexMain);
    assert( inMutex==0 );
    assert( !mutexOwnerValid );
................................................................................
  }
  inMutex++;
  pthread_mutex_unlock(&mutexAux);
#else
  inMutex++;
#endif
}
static void sqlite3UnixLeaveMutex(){
  assert( inMutex>0 );
#ifdef SQLITE_UNIX_THREADS
  pthread_mutex_lock(&mutexAux);
  inMutex--;
  assert( pthread_equal(mutexOwner, pthread_self()) );
  if( inMutex==0 ){
    assert( mutexOwnerValid );
................................................................................
/*
** Return TRUE if the mutex is currently held.
**
** If the thisThrd parameter is true, return true only if the
** calling thread holds the mutex.  If the parameter is false, return
** true if any thread holds the mutex.
*/
static int sqlite3UnixInMutex(int thisThrd){
#ifdef SQLITE_UNIX_THREADS
  int rc;
  pthread_mutex_lock(&mutexAux);
  rc = inMutex>0 && (thisThrd==0 || pthread_equal(mutexOwner,pthread_self()));
  pthread_mutex_unlock(&mutexAux);
  return rc;
#else
................................................................................
** then return NULL.
**
** If called with allocateFlag<0, check to see if the thread specific
** data is allocated and is all zero.  If it is then deallocate it.
** Return a pointer to the thread specific data or NULL if it is
** unallocated or gets deallocated.
*/
static ThreadData *sqlite3UnixThreadSpecificData(int allocateFlag){
  static const ThreadData zeroData = {0};  /* Initializer to silence warnings
                                           ** from broken compilers */
#ifdef SQLITE_UNIX_THREADS
  static pthread_key_t key;
  static int keyInit = 0;
  ThreadData *pTsd;

................................................................................
#endif

/*
** Find the current time (in Universal Coordinated Time).  Write the
** current time and date as a Julian Day number into *prNow and
** return 0.  Return 1 if the time and date cannot be found.
*/
static int sqlite3UnixCurrentTime(double *prNow){
#ifdef NO_GETTOD
  time_t t;
  time(&t);
  *prNow = t/86400.0 + 2440587.5;
#else
  struct timeval sNow;
  gettimeofday(&sNow, 0);
................................................................................
** enabled. This version allocates an extra 8-bytes at the beginning of each
** block and stores the size of the allocation there.
**
** If neither memory-management or debugging is enabled, the second
** set of implementations is used instead.
*/
#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) || defined (SQLITE_MEMDEBUG)
static void *sqlite3GenericMalloc(int n){
  char *p = (char *)malloc(n+8);
  assert(n>0);
  assert(sizeof(int)<=8);
  if( p ){
    *(int *)p = n;
    p += 8;
  }
  return (void *)p;
}
static void *sqlite3GenericRealloc(void *p, int n){
  char *p2 = ((char *)p - 8);
  assert(n>0);
  p2 = (char*)realloc(p2, n+8);
  if( p2 ){
    *(int *)p2 = n;
    p2 += 8;
  }
  return (void *)p2;
}
static void sqlite3GenericFree(void *p){
  assert(p);
  free((void *)((char *)p - 8));
}
static int sqlite3GenericAllocationSize(void *p){
  return p ? *(int *)((char *)p - 8) : 0;
}
#else
static void *sqlite3GenericMalloc(int n){
  char *p = (char *)malloc(n);
  return (void *)p;
}
static void *sqlite3GenericRealloc(void *p, int n){
  assert(n>0);
  p = realloc(p, n);
  return p;
}
static void sqlite3GenericFree(void *p){
  assert(p);
  free(p);
}
/* Never actually used, but needed for the linker */
static int sqlite3GenericAllocationSize(void *p){ return 0; }
#endif

/*
** The default size of a disk sector
*/
#ifndef PAGER_SECTOR_SIZE
# define PAGER_SECTOR_SIZE 512
................................................................................
** whatever it is it does.  While this other process is holding the
** file open, we will be unable to delete it.  To work around this
** problem, we delay 100 milliseconds and try to delete again.  Up
** to MX_DELETION_ATTEMPTs deletion attempts are run before giving
** up and returning an error.
*/
#define MX_DELETION_ATTEMPTS 3
static int sqlite3WinDelete(const char *zFilename){
  int cnt = 0;
  int rc;
  void *zConverted = convertUtf8Filename(zFilename);
  if( zConverted==0 ){
    return SQLITE_NOMEM;
  }
  SimulateIOError(return SQLITE_IOERR_DELETE);
................................................................................
  OSTRACE2("DELETE \"%s\"\n", zFilename);
  return rc!=0 ? SQLITE_OK : SQLITE_IOERR;
}

/*
** Return TRUE if the named file exists.
*/
static int sqlite3WinFileExists(const char *zFilename){
  int exists = 0;
  void *zConverted = convertUtf8Filename(zFilename);
  if( zConverted==0 ){
    return SQLITE_NOMEM;
  }
  if( isNT() ){
    exists = GetFileAttributesW((WCHAR*)zConverted) != 0xffffffff;
................................................................................
** and *pReadonly is set to 0 if the file was opened for reading and
** writing or 1 if the file was opened read-only.  The function returns
** SQLITE_OK.
**
** On failure, the function returns SQLITE_CANTOPEN and leaves
** *id and *pReadonly unchanged.
*/
static int sqlite3WinOpenReadWrite(
  const char *zFilename,
  OsFile **pId,
  int *pReadonly
){
  winFile f;
  HANDLE h;
  void *zConverted = convertUtf8Filename(zFilename);
................................................................................
**
** Sometimes if we have just deleted a prior journal file, windows
** will fail to open a new one because there is a "pending delete".
** To work around this bug, we pause for 100 milliseconds and attempt
** a second open after the first one fails.  The whole operation only
** fails if both open attempts are unsuccessful.
*/
static int sqlite3WinOpenExclusive(const char *zFilename, OsFile **pId, int delFlag){
  winFile f;
  HANDLE h;
  DWORD fileflags;
  void *zConverted = convertUtf8Filename(zFilename);
  if( zConverted==0 ){
    return SQLITE_NOMEM;
  }
................................................................................
/*
** Attempt to open a new file for read-only access.
**
** On success, write the file handle into *id and return SQLITE_OK.
**
** On failure, return SQLITE_CANTOPEN.
*/
static int sqlite3WinOpenReadOnly(const char *zFilename, OsFile **pId){
  winFile f;
  HANDLE h;
  void *zConverted = convertUtf8Filename(zFilename);
  if( zConverted==0 ){
    return SQLITE_NOMEM;
  }
  assert( *pId==0 );
................................................................................
  return SQLITE_OK;
}

/*
** Create a temporary file name in zBuf.  zBuf must be big enough to
** hold at least SQLITE_TEMPNAME_SIZE characters.
*/
static int sqlite3WinTempFileName(char *zBuf){
  static char zChars[] =
    "abcdefghijklmnopqrstuvwxyz"
    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    "0123456789";
  int i, j;
  char zTempPath[SQLITE_TEMPNAME_SIZE];
  if( sqlite3_temp_directory ){
................................................................................
  }
}

/*
** Sync the directory zDirname. This is a no-op on operating systems other
** than UNIX.
*/
static int sqlite3WinSyncDirectory(const char *zDirname){
  SimulateIOError(return SQLITE_IOERR_READ);
  return SQLITE_OK;
}

/*
** Truncate an open file to a specified size
*/
................................................................................
}

#ifndef SQLITE_OMIT_PAGER_PRAGMAS
/*
** Check that a given pathname is a directory and is writable 
**
*/
static int sqlite3WinIsDirWritable(char *zDirname){
  int fileAttr;
  void *zConverted;
  if( zDirname==0 ) return 0;
  if( !isNT() && strlen(zDirname)>MAX_PATH ) return 0;

  zConverted = convertUtf8Filename(zDirname);
  if( zConverted==0 ){
................................................................................

/*
** Turn a relative pathname into a full pathname.  Return a pointer
** to the full pathname stored in space obtained from sqliteMalloc().
** The calling function is responsible for freeing this space once it
** is no longer needed.
*/
static char *sqlite3WinFullPathname(const char *zRelative){
  char *zFull;
#if defined(__CYGWIN__)
  int nByte;
  nByte = strlen(zRelative) + MAX_PATH + 1001;
  zFull = sqliteMalloc( nByte );
  if( zFull==0 ) return 0;
  if( cygwin_conv_to_full_win32_path(zRelative, zFull) ) return 0;
................................................................................
****************************************************************************/

#if !defined(SQLITE_OMIT_LOAD_EXTENSION)
/*
** Interfaces for opening a shared library, finding entry points
** within the shared library, and closing the shared library.
*/
static void *sqlite3WinDlopen(const char *zFilename){
  HANDLE h;
  void *zConverted = convertUtf8Filename(zFilename);
  if( zConverted==0 ){
    return 0;
  }
  if( isNT() ){
    h = LoadLibraryW((WCHAR*)zConverted);
................................................................................
    h = LoadLibraryA((char*)zConverted);
#endif
  }
  sqliteFree(zConverted);
  return (void*)h;
  
}
static void *sqlite3WinDlsym(void *pHandle, const char *zSymbol){
#if OS_WINCE
  /* The GetProcAddressA() routine is only available on wince. */
  return GetProcAddressA((HANDLE)pHandle, zSymbol);
#else
  /* All other windows platforms expect GetProcAddress() to take
  ** an Ansi string regardless of the _UNICODE setting */
  return GetProcAddress((HANDLE)pHandle, zSymbol);
#endif
}
static int sqlite3WinDlclose(void *pHandle){
  return FreeLibrary((HANDLE)pHandle);
}
#endif /* !SQLITE_OMIT_LOAD_EXTENSION */

/*
** Get information to seed the random number generator.  The seed
** is written into the buffer zBuf[256].  The calling function must
** supply a sufficiently large buffer.
*/
static int sqlite3WinRandomSeed(char *zBuf){
  /* We have to initialize zBuf to prevent valgrind from reporting
  ** errors.  The reports issued by valgrind are incorrect - we would
  ** prefer that the randomness be increased by making use of the
  ** uninitialized space in zBuf - but valgrind errors tend to worry
  ** some users.  Rather than argue, it seems easier just to initialize
  ** the whole array and silence valgrind, even if that means less randomness
  ** in the random seed.
................................................................................
  GetSystemTime((LPSYSTEMTIME)zBuf);
  return SQLITE_OK;
}

/*
** Sleep for a little while.  Return the amount of time slept.
*/
static int sqlite3WinSleep(int ms){
  Sleep(ms);
  return ms;
}

/*
** Static variables used for thread synchronization
*/
................................................................................
**
** SQLite uses only a single Mutex.  There is not much critical
** code and what little there is executes quickly and without blocking.
**
** Version 3.3.1 and earlier used a simple mutex.  Beginning with
** version 3.3.2, a recursive mutex is required.
*/
static void sqlite3WinEnterMutex(){
#ifdef SQLITE_W32_THREADS
  static int isInit = 0;
  while( !isInit ){
    static long lock = 0;
    if( InterlockedIncrement(&lock)==1 ){
      InitializeCriticalSection(&cs);
      isInit = 1;
................................................................................
    }
  }
  EnterCriticalSection(&cs);
  mutexOwner = GetCurrentThreadId();
#endif
  inMutex++;
}
static void sqlite3WinLeaveMutex(){
  assert( inMutex );
  inMutex--;
#ifdef SQLITE_W32_THREADS
  assert( mutexOwner==GetCurrentThreadId() );
  LeaveCriticalSection(&cs);
#endif
}
................................................................................
/*
** Return TRUE if the mutex is currently held.
**
** If the thisThreadOnly parameter is true, return true if and only if the
** calling thread holds the mutex.  If the parameter is false, return
** true if any thread holds the mutex.
*/
static int sqlite3WinInMutex(int thisThreadOnly){
#ifdef SQLITE_W32_THREADS
  return inMutex>0 && (thisThreadOnly==0 || mutexOwner==GetCurrentThreadId());
#else
  return inMutex>0;
#endif
}

................................................................................
#endif

/*
** Find the current time (in Universal Coordinated Time).  Write the
** current time and date as a Julian Day number into *prNow and
** return 0.  Return 1 if the time and date cannot be found.
*/
static int sqlite3WinCurrentTime(double *prNow){
  FILETIME ft;
  /* FILETIME structure is a 64-bit value representing the number of 
     100-nanosecond intervals since January 1, 1601 (= JD 2305813.5). 
  */
  double now;
#if OS_WINCE
  SYSTEMTIME time;
................................................................................
** then return NULL.
**
** If called with allocateFlag<0, check to see if the thread specific
** data is allocated and is all zero.  If it is then deallocate it.
** Return a pointer to the thread specific data or NULL if it is
** unallocated or gets deallocated.
*/
static ThreadData *sqlite3WinThreadSpecificData(int allocateFlag){
  static int key;
  static int keyInit = 0;
  static const ThreadData zeroData = {0};
  ThreadData *pTsd;

  if( !keyInit ){
    sqlite3OsEnterMutex();
................................................................................
** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
#ifndef SQLITE_OMIT_DISKIO

/*
** Macros for troubleshooting.  Normally turned off
*/
#if 0
................................................................................
** on success or an error code is something goes wrong.
*/
static int write32bits(OsFile *fd, u32 val){
  char ac[4];
  put32bits(ac, val);
  return sqlite3OsWrite(fd, ac, 4);
}

/*
** Read a 32-bit integer at offset 'offset' from the page identified by
** page header 'p'.
*/
static u32 retrieve32bits(PgHdr *p, int offset){
  unsigned char *ac;
  ac = &((unsigned char*)PGHDR_TO_DATA(p))[offset];
  return sqlite3Get4byte(ac);
}


/*
** This function should be called when an error occurs within the pager
** code. The first argument is a pointer to the pager structure, the
** second the error-code about to be returned by a pager API function. 
** The value returned is a copy of the second argument to this function. 
**
................................................................................
  }
  return rc;
}

/*
** Change the maximum number of in-memory pages that are allowed.
*/
static void sqlite3PagerSetCachesize(Pager *pPager, int mxPage){
  if( mxPage>10 ){
    pPager->mxPage = mxPage;
  }else{
    pPager->mxPage = 10;
  }
}

................................................................................
**              assurance that the journal will not be corrupted to the
**              point of causing damage to the database during rollback.
**
** Numeric values associated with these states are OFF==1, NORMAL=2,
** and FULL=3.
*/
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
static void sqlite3PagerSetSafetyLevel(Pager *pPager, int level, int full_fsync){
  pPager->noSync =  level==1 || pPager->tempFile;
  pPager->fullSync = level==3 && !pPager->tempFile;
  pPager->full_fsync = full_fsync;
  if( pPager->noSync ) pPager->needSync = 0;
}
#endif

................................................................................
** and used as the file to be cached.  The file will be deleted
** automatically when it is closed.
**
** If zFilename is ":memory:" then all information is held in cache.
** It is never written to disk.  This can be used to implement an
** in-memory database.
*/
static int sqlite3PagerOpen(
  Pager **ppPager,         /* Return the Pager structure here */
  const char *zFilename,   /* Name of the database file to open */
  int nExtra,              /* Extra bytes append to each in-memory page */
  int flags                /* flags controlling this file */
){
  Pager *pPager = 0;
  char *zFullPathname = 0;
................................................................................
#endif
  return SQLITE_OK;
}

/*
** Set the busy handler function.
*/
static void sqlite3PagerSetBusyhandler(Pager *pPager, BusyHandler *pBusyHandler){
  pPager->pBusyHandler = pBusyHandler;
}

/*
** Set the destructor for this pager.  If not NULL, the destructor is called
** when the reference count on each page reaches zero.  The destructor can
** be used to clean up information in the extra segment appended to each page.
**
** The destructor is not called as a result sqlite3PagerClose().  
** Destructors are only called by sqlite3PagerUnref().
*/
static void sqlite3PagerSetDestructor(Pager *pPager, void (*xDesc)(DbPage*,int)){
  pPager->xDestructor = xDesc;
}

/*
** Set the reinitializer for this pager.  If not NULL, the reinitializer
** is called when the content of a page in cache is restored to its original
** value as a result of a rollback.  The callback gives higher-level code
** an opportunity to restore the EXTRA section to agree with the restored
** page data.
*/
static void sqlite3PagerSetReiniter(Pager *pPager, void (*xReinit)(DbPage*,int)){
  pPager->xReiniter = xReinit;
}

/*
** Set the page size.  Return the new size.  If the suggest new page
** size is inappropriate, then an alternative page size is selected
** and returned.
*/
static int sqlite3PagerSetPagesize(Pager *pPager, int pageSize){
  assert( pageSize>=512 && pageSize<=SQLITE_MAX_PAGE_SIZE );
  if( !pPager->memDb && pPager->nRef==0 ){
    pager_reset(pPager);
    pPager->pageSize = pageSize;
    pPager->pTmpSpace = sqlite3ReallocOrFree(pPager->pTmpSpace, pageSize);
  }
  return pPager->pageSize;
................................................................................
/*
** Attempt to set the maximum database page count if mxPage is positive. 
** Make no changes if mxPage is zero or negative.  And never reduce the
** maximum page count below the current size of the database.
**
** Regardless of mxPage, return the current maximum page count.
*/
static int sqlite3PagerMaxPageCount(Pager *pPager, int mxPage){
  if( mxPage>0 ){
    pPager->mxPgno = mxPage;
  }
  sqlite3PagerPagecount(pPager);
  return pPager->mxPgno;
}

................................................................................
**
** No error checking is done. The rational for this is that this function 
** may be called even if the file does not exist or contain a header. In 
** these cases sqlite3OsRead() will return an error, to which the correct 
** response is to zero the memory at pDest and continue.  A real IO error 
** will presumably recur and be picked up later (Todo: Think about this).
*/
static int sqlite3PagerReadFileheader(Pager *pPager, int N, unsigned char *pDest){
  int rc = SQLITE_OK;
  memset(pDest, 0, N);
  if( MEMDB==0 ){
    disable_simulated_io_errors();
    sqlite3OsSeek(pPager->fd, 0);
    enable_simulated_io_errors();
    IOTRACE(("DBHDR %p 0 %d\n", pPager, N))
................................................................................
** pPager. 
**
** If the PENDING_BYTE lies on the page directly after the end of the
** file, then consider this page part of the file too. For example, if
** PENDING_BYTE is byte 4096 (the first byte of page 5) and the size of the
** file is 4096 bytes, 5 is returned instead of 4.
*/
static int sqlite3PagerPagecount(Pager *pPager){
  i64 n;
  int rc;
  assert( pPager!=0 );
  if( pPager->errCode ){
    return 0;
  }
  if( pPager->dbSize>=0 ){
................................................................................
  }
  return rc;
}

/*
** Truncate the file to the number of pages specified.
*/
static int sqlite3PagerTruncate(Pager *pPager, Pgno nPage){
  int rc;
  assert( pPager->state>=PAGER_SHARED || MEMDB );
  sqlite3PagerPagecount(pPager);
  if( pPager->errCode ){
    rc = pPager->errCode;
    return rc;
  }
................................................................................
** result in a coredump.
**
** This function always succeeds. If a transaction is active an attempt
** is made to roll it back. If an error occurs during the rollback 
** a hot journal may be left in the filesystem but no error is returned
** to the caller.
*/
static int sqlite3PagerClose(Pager *pPager){
#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
  /* A malloc() cannot fail in sqlite3ThreadData() as one or more calls to 
  ** malloc() must have already been made by this thread before it gets
  ** to this point. This means the ThreadData must have been allocated already
  ** so that ThreadData.nAlloc can be set.
  */
  ThreadData *pTsd = sqlite3ThreadData();
................................................................................
  return SQLITE_OK;
}

#if !defined(NDEBUG) || defined(SQLITE_TEST)
/*
** Return the page number for the given page data.
*/
static Pgno sqlite3PagerPagenumber(DbPage *p){
  return p->pgno;
}
#endif

/*
** The page_ref() function increments the reference count for a page.
** If the page is currently on the freelist (the reference count is zero) then
................................................................................
# define page_ref(P)   ((P)->nRef==0?_page_ref(P):(void)(P)->nRef++)
#endif

/*
** Increment the reference count for a page.  The input pointer is
** a reference to the page data.
*/
static int sqlite3PagerRef(DbPage *pPg){
  page_ref(pPg);
  return SQLITE_OK;
}

/*
** Sync the journal.  In other words, make sure all the pages that have
** been written to the journal have actually reached the surface of the
................................................................................
**
** nReq is the number of bytes of memory required. Once this much has
** been released, the function returns. A negative value for nReq means
** free as much memory as possible. The return value is the total number 
** of bytes of memory released.
*/
#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) && !defined(SQLITE_OMIT_DISKIO)
static int sqlite3PagerReleaseMemory(int nReq){
  const ThreadData *pTsdro = sqlite3ThreadDataReadOnly();
  int nReleased = 0;
  int i;

  /* If the the global mutex is held, this subroutine becomes a
  ** o-op; zero bytes of memory are freed.  This is because
  ** some of the code invoked by this function may also
................................................................................
** of the page at this time, so do not do a disk read.  Just fill in the
** page content with zeros.  But mark the fact that we have not read the
** content by setting the PgHdr.needRead flag.  Later on, if 
** sqlite3PagerWrite() is called on this page or if this routine is
** called again with noContent==0, that means that the content is needed
** and the disk read should occur at that point.
*/
static int sqlite3PagerAcquire(
  Pager *pPager,      /* The pager open on the database file */
  Pgno pgno,          /* Page number to fetch */
  DbPage **ppPage,    /* Write a pointer to the page here */
  int noContent       /* Do not bother reading content from disk if true */
){
  PgHdr *pPg;
  int rc;
................................................................................
**
** See also sqlite3PagerGet().  The difference between this routine
** and sqlite3PagerGet() is that _get() will go to the disk and read
** in the page if the page is not already in cache.  This routine
** returns NULL if the page is not in cache or if a disk I/O error 
** has ever happened.
*/
static DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno){
  PgHdr *pPg;

  assert( pPager!=0 );
  assert( pgno!=0 );

  if( pPager->state==PAGER_UNLOCK ){
    assert( !pPager->pAll || pPager->exclusiveMode );
................................................................................
** Release a page.
**
** If the number of references to the page drop to zero, then the
** page is added to the LRU list.  When all references to all pages
** are released, a rollback occurs and the lock on the database is
** removed.
*/
static int sqlite3PagerUnref(DbPage *pPg){

  /* Decrement the reference count for this page
  */
  assert( pPg->nRef>0 );
  pPg->nRef--;
  REFINFO(pPg);

................................................................................
**
** If the database is already reserved for writing, this routine is a no-op.
**
** If exFlag is true, go ahead and get an EXCLUSIVE lock on the file
** immediately instead of waiting until we try to flush the cache.  The
** exFlag is ignored if a transaction is already active.
*/
static int sqlite3PagerBegin(DbPage *pPg, int exFlag){
  Pager *pPager = pPg->pPager;
  int rc = SQLITE_OK;
  assert( pPg->nRef>0 );
  assert( pPager->state!=PAGER_UNLOCK );
  if( pPager->state==PAGER_SHARED ){
    assert( pPager->aInJournal==0 );
    if( MEMDB ){
................................................................................
** and write the page *pData to the journal.
**
** The difference between this function and pager_write() is that this
** function also deals with the special case where 2 or more pages
** fit on a single disk sector. In this case all co-resident pages
** must have been written to the journal file before returning.
*/
static int sqlite3PagerWrite(DbPage *pDbPage){
  int rc = SQLITE_OK;

  PgHdr *pPg = pDbPage;
  Pager *pPager = pPg->pPager;
  Pgno nPagePerSector = (pPager->sectorSize/pPager->pageSize);

  if( !MEMDB && nPagePerSector>1 ){
................................................................................

/*
** Return TRUE if the page given in the argument was previously passed
** to sqlite3PagerWrite().  In other words, return TRUE if it is ok
** to change the content of the page.
*/
#ifndef NDEBUG
static int sqlite3PagerIswriteable(DbPage *pPg){
  return pPg->dirty;
}
#endif

#ifndef SQLITE_OMIT_VACUUM
/*
** Replace the content of a single page with the information in the third
** argument.
*/
static int sqlite3PagerOverwrite(Pager *pPager, Pgno pgno, void *pData){
  PgHdr *pPg;
  int rc;

  rc = sqlite3PagerGet(pPager, pgno, &pPg);
  if( rc==SQLITE_OK ){
    rc = sqlite3PagerWrite(pPg);
    if( rc==SQLITE_OK ){
................................................................................
** a transaction then removed from the freelist during a later part
** of the same transaction and reused for some other purpose.  When it
** is first added to the freelist, this routine is called.  When reused,
** the sqlite3PagerDontRollback() routine is called.  But because the
** page contains critical data, we still need to be sure it gets
** rolled back in spite of the sqlite3PagerDontRollback() call.
*/
static void sqlite3PagerDontWrite(DbPage *pDbPage){
  PgHdr *pPg = pDbPage;
  Pager *pPager = pPg->pPager;

  if( MEMDB ) return;
  pPg->alwaysRollback = 1;
  if( pPg->dirty && !pPager->stmtInUse ){
    assert( pPager->state>=PAGER_SHARED );
................................................................................
** rollback journal.
**
** If we have not yet actually read the content of this page (if
** the PgHdr.needRead flag is set) then this routine acts as a promise
** that we will never need to read the page content in the future.
** so the needRead flag can be cleared at this point.
*/
static void sqlite3PagerDontRollback(DbPage *pPg){
  Pager *pPager = pPg->pPager;

  assert( pPager->state>=PAGER_RESERVED );
  if( pPager->journalOpen==0 ) return;
  if( pPg->alwaysRollback || pPager->alwaysRollback || MEMDB ) return;
  if( !pPg->inJournal && (int)pPg->pgno <= pPager->origDbSize ){
    assert( pPager->aInJournal!=0 );
................................................................................
  if( !pPager->changeCountDone ){
    /* Open page 1 of the file for writing. */
    rc = sqlite3PagerGet(pPager, 1, &pPgHdr);
    if( rc!=SQLITE_OK ) return rc;
    rc = sqlite3PagerWrite(pPgHdr);
    if( rc!=SQLITE_OK ) return rc;
  
    /* Read the current value at byte 24. */
    change_counter = retrieve32bits(pPgHdr, 24);
  
    /* Increment the value just read and write it back to byte 24. */

    change_counter++;
    put32bits(((char*)PGHDR_TO_DATA(pPgHdr))+24, change_counter);
  
    /* Release the page reference. */
    sqlite3PagerUnref(pPgHdr);
    pPager->changeCountDone = 1;
  }
  return SQLITE_OK;
}

................................................................................
**
** Note that if zMaster==NULL, this does not overwrite a previous value
** passed to an sqlite3PagerCommitPhaseOne() call.
**
** If parameter nTrunc is non-zero, then the pager file is truncated to
** nTrunc pages (this is used by auto-vacuum databases).
*/
static int sqlite3PagerCommitPhaseOne(Pager *pPager, const char *zMaster, Pgno nTrunc){
  int rc = SQLITE_OK;

  PAGERTRACE4("DATABASE SYNC: File=%s zMaster=%s nTrunc=%d\n", 
      pPager->zFilename, zMaster, nTrunc);

  /* If this is an in-memory db, or no pages have been written to, or this
  ** function has already been called, it is a no-op.
................................................................................
/*
** Commit all changes to the database and release the write lock.
**
** If the commit fails for any reason, a rollback attempt is made
** and an error code is returned.  If the commit worked, SQLITE_OK
** is returned.
*/
static int sqlite3PagerCommitPhaseTwo(Pager *pPager){
  int rc;
  PgHdr *pPg;

  if( pPager->errCode ){
    return pPager->errCode;
  }
  if( pPager->state<PAGER_RESERVED ){
................................................................................
** This routine cannot fail unless some other process is not following
** the correct locking protocol or unless some other
** process is writing trash into the journal file (SQLITE_CORRUPT) or
** unless a prior malloc() failed (SQLITE_NOMEM).  Appropriate error
** codes are returned for all these occasions.  Otherwise,
** SQLITE_OK is returned.
*/
static int sqlite3PagerRollback(Pager *pPager){
  int rc;
  PAGERTRACE2("ROLLBACK %d\n", PAGERID(pPager));
  if( MEMDB ){
    PgHdr *p;
    for(p=pPager->pAll; p; p=p->pNextAll){
      PgHistory *pHist;
      assert( !p->alwaysRollback );
................................................................................
  return pager_error(pPager, rc);
}

/*
** Return TRUE if the database file is opened read-only.  Return FALSE
** if the database is (in theory) writable.
*/
static int sqlite3PagerIsreadonly(Pager *pPager){
  return pPager->readOnly;
}

/*
** Return the number of references to the pager.
*/
static int sqlite3PagerRefcount(Pager *pPager){
  return pPager->nRef;
}

#ifdef SQLITE_TEST
/*
** This routine is used for testing and analysis only.
*/
static int *sqlite3PagerStats(Pager *pPager){
  static int a[11];
  a[0] = pPager->nRef;
  a[1] = pPager->nPage;
  a[2] = pPager->mxPage;
  a[3] = pPager->dbSize;
  a[4] = pPager->state;
  a[5] = pPager->errCode;
................................................................................
/*
** Set the statement rollback point.
**
** This routine should be called with the transaction journal already
** open.  A new statement journal is created that can be used to rollback
** changes of a single SQL command within a larger transaction.
*/
static int sqlite3PagerStmtBegin(Pager *pPager){
  int rc;
  assert( !pPager->stmtInUse );
  assert( pPager->state>=PAGER_SHARED );
  assert( pPager->dbSize>=0 );
  PAGERTRACE2("STMT-BEGIN %d\n", PAGERID(pPager));
  if( MEMDB ){
    pPager->stmtInUse = 1;
................................................................................
  }
  return rc;
}

/*
** Commit a statement.
*/
static int sqlite3PagerStmtCommit(Pager *pPager){
  if( pPager->stmtInUse ){
    PgHdr *pPg, *pNext;
    PAGERTRACE2("STMT-COMMIT %d\n", PAGERID(pPager));
    if( !MEMDB ){
      sqlite3OsSeek(pPager->stfd, 0);
      /* sqlite3OsTruncate(pPager->stfd, 0); */
      sqliteFree( pPager->aInStmt );
................................................................................
  pPager->stmtAutoopen = 0;
  return SQLITE_OK;
}

/*
** Rollback a statement.
*/
static int sqlite3PagerStmtRollback(Pager *pPager){
  int rc;
  if( pPager->stmtInUse ){
    PAGERTRACE2("STMT-ROLLBACK %d\n", PAGERID(pPager));
    if( MEMDB ){
      PgHdr *pPg;
      PgHistory *pHist;
      for(pPg=pPager->pStmt; pPg; pPg=pHist->pNextStmt){
................................................................................
  pPager->stmtAutoopen = 0;
  return rc;
}

/*
** Return the full pathname of the database file.
*/
static const char *sqlite3PagerFilename(Pager *pPager){
  return pPager->zFilename;
}

/*
** Return the directory of the database file.
*/
static const char *sqlite3PagerDirname(Pager *pPager){
  return pPager->zDirectory;
}

/*
** Return the full pathname of the journal file.
*/
static const char *sqlite3PagerJournalname(Pager *pPager){
  return pPager->zJournal;
}

/*
** Return true if fsync() calls are disabled for this pager.  Return FALSE
** if fsync()s are executed normally.
*/
static int sqlite3PagerNosync(Pager *pPager){
  return pPager->noSync;
}

#ifdef SQLITE_HAS_CODEC
/*
** Set the codec for this pager
*/
static void sqlite3PagerSetCodec(
  Pager *pPager,
  void *(*xCodec)(void*,void*,Pgno,int),
  void *pCodecArg
){
  pPager->xCodec = xCodec;
  pPager->pCodecArg = pCodecArg;
}
................................................................................
** allocated along with the page) is the responsibility of the caller.
**
** A transaction must be active when this routine is called. It used to be
** required that a statement transaction was not active, but this restriction
** has been removed (CREATE INDEX needs to move a page when a statement
** transaction is active).
*/
static int sqlite3PagerMovepage(Pager *pPager, DbPage *pPg, Pgno pgno){
  PgHdr *pPgOld;  /* The page being overwritten. */
  int h;
  Pgno needSyncPgno = 0;

  assert( pPg->nRef>0 );

  PAGERTRACE5("MOVE %d page %d (needSync=%d) moves to %d\n", 
................................................................................
  return SQLITE_OK;
}
#endif

/*
** Return a pointer to the data for the specified page.
*/
static void *sqlite3PagerGetData(DbPage *pPg){
  return PGHDR_TO_DATA(pPg);
}

/*
** Return a pointer to the Pager.nExtra bytes of "extra" space 
** allocated along with the specified page.
*/
static void *sqlite3PagerGetExtra(DbPage *pPg){
  Pager *pPager = pPg->pPager;
  return (pPager?PGHDR_TO_EXTRA(pPg, pPager):0);
}

/*
** Get/set the locking-mode for this pager. Parameter eMode must be one
** of PAGER_LOCKINGMODE_QUERY, PAGER_LOCKINGMODE_NORMAL or 
................................................................................
** PAGER_LOCKINGMODE_EXCLUSIVE. If the parameter is not _QUERY, then
** the locking-mode is set to the value specified.
**
** The returned value is either PAGER_LOCKINGMODE_NORMAL or
** PAGER_LOCKINGMODE_EXCLUSIVE, indicating the current (possibly updated)
** locking-mode.
*/
static int sqlite3PagerLockingMode(Pager *pPager, int eMode){
  assert( eMode==PAGER_LOCKINGMODE_QUERY
            || eMode==PAGER_LOCKINGMODE_NORMAL
            || eMode==PAGER_LOCKINGMODE_EXCLUSIVE );
  assert( PAGER_LOCKINGMODE_QUERY<0 );
  assert( PAGER_LOCKINGMODE_NORMAL>=0 && PAGER_LOCKINGMODE_EXCLUSIVE>=0 );
  if( eMode>=0 && !pPager->tempFile ){
    pPager->exclusiveMode = eMode;
................................................................................

#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
/*
** Return the current state of the file lock for the given pager.
** The return value is one of NO_LOCK, SHARED_LOCK, RESERVED_LOCK,
** PENDING_LOCK, or EXCLUSIVE_LOCK.
*/
static int sqlite3PagerLockstate(Pager *pPager){
  return sqlite3OsLockState(pPager->fd);
}
#endif

#ifdef SQLITE_DEBUG
/*
** Print a listing of all referenced pages and their ref count.
*/
static void sqlite3PagerRefdump(Pager *pPager){
  PgHdr *pPg;
  for(pPg=pPager->pAll; pPg; pPg=pPg->pNextAll){
    if( pPg->nRef<=0 ) continue;
    sqlite3DebugPrintf("PAGE %3d addr=%p nRef=%d\n", 
       pPg->pgno, PGHDR_TO_DATA(pPg), pPg->nRef);
  }
}
................................................................................
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
**
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
** Including a description of file format and an overview of operation.
*/
/************** Include btreeInt.h in the middle of btree.c ******************/
/************** Begin file btreeInt.h ****************************************/
................................................................................
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
**
** This file implements a external (disk-based) database using BTrees.
** For a detailed discussion of BTrees, refer to
**
**     Donald E. Knuth, THE ART OF COMPUTER PROGRAMMING, Volume 3:
**     "Sorting And Searching", pages 473-480. Addison-Wesley
**     Publishing Company, Reading, Massachusetts.
................................................................................
#define put2byte(p,v) ((p)[0] = (v)>>8, (p)[1] = (v))
#define get4byte sqlite3Get4byte
#define put4byte sqlite3Put4byte

/*
** Internal routines that should be accessed by the btree layer only.
*/
static int sqlite3BtreeGetPage(BtShared*, Pgno, MemPage**, int);
static int sqlite3BtreeInitPage(MemPage *pPage, MemPage *pParent);
static void sqlite3BtreeParseCellPtr(MemPage*, u8*, CellInfo*);
static void sqlite3BtreeParseCell(MemPage*, int, CellInfo*);
static u8 *sqlite3BtreeFindCell(MemPage *pPage, int iCell);
static int sqlite3BtreeRestoreOrClearCursorPosition(BtCursor *pCur);
static void sqlite3BtreeGetTempCursor(BtCursor *pCur, BtCursor *pTempCur);
static void sqlite3BtreeReleaseTempCursor(BtCursor *pCur);
static int sqlite3BtreeIsRootPage(MemPage *pPage);
static void sqlite3BtreeMoveToParent(BtCursor *pCur);

/************** End of btreeInt.h ********************************************/
/************** Continuing where we left off in btree.c **********************/

/*
** The header string that appears at the beginning of every
** SQLite database.
................................................................................
** at most one effective restoreOrClearCursorPosition() call after each 
** saveCursorPosition().
**
** If the second argument argument - doSeek - is false, then instead of 
** returning the cursor to it's saved position, any saved position is deleted
** and the cursor state set to CURSOR_INVALID.
*/
static int sqlite3BtreeRestoreOrClearCursorPosition(BtCursor *pCur){
  int rc;
  assert( pCur->eState==CURSOR_REQUIRESEEK );
#ifndef SQLITE_OMIT_INCRBLOB
  if( pCur->isIncrblobHandle ){
    return SQLITE_ABORT;
  }
#endif
................................................................................
** the page, 1 means the second cell, and so forth) return a pointer
** to the cell content.
**
** This routine works only for pages that do not contain overflow cells.
*/
#define findCell(pPage, iCell) \
  ((pPage)->aData + get2byte(&(pPage)->aData[(pPage)->cellOffset+2*(iCell)]))
static u8 *sqlite3BtreeFindCell(MemPage *pPage, int iCell){
  u8 *data = pPage->aData;
  assert( iCell>=0 );
  assert( iCell<get2byte(&data[pPage->hdrOffset+3]) );
  return findCell(pPage, iCell);
}

/*
** This a more complex version of sqlite3BtreeFindCell() that works for
** pages that do contain overflow cells.  See insert
*/
................................................................................
** are two versions of this function.  sqlite3BtreeParseCell() takes a 
** cell index as the second argument and sqlite3BtreeParseCellPtr() 
** takes a pointer to the body of the cell as its second argument.
**
** Within this file, the parseCell() macro can be called instead of
** sqlite3BtreeParseCellPtr(). Using some compilers, this will be faster.
*/
static void sqlite3BtreeParseCellPtr(
  MemPage *pPage,         /* Page containing the cell */
  u8 *pCell,              /* Pointer to the cell text. */
  CellInfo *pInfo         /* Fill in this structure */
){
  int n;                  /* Number bytes in cell content header */
  u32 nPayload;           /* Number of bytes of cell payload */

................................................................................
    }
    pInfo->iOverflow = pInfo->nLocal + n;
    pInfo->nSize = pInfo->iOverflow + 4;
  }
}
#define parseCell(pPage, iCell, pInfo) \
  sqlite3BtreeParseCellPtr((pPage), findCell((pPage), (iCell)), (pInfo))
static void sqlite3BtreeParseCell(
  MemPage *pPage,         /* Page containing the cell */
  int iCell,              /* The cell index.  First cell is 0 */
  CellInfo *pInfo         /* Fill in this structure */
){
  parseCell(pPage, iCell, pInfo);
}

................................................................................
**
** Return SQLITE_OK on success.  If we see that the page does
** not contain a well-formed database page, then return 
** SQLITE_CORRUPT.  Note that a return of SQLITE_OK does not
** guarantee that the page is well-formed.  It only shows that
** we failed to detect any corruption.
*/
static int sqlite3BtreeInitPage(
  MemPage *pPage,        /* The page to be initialized */
  MemPage *pParent       /* The parent.  Might be NULL */
){
  int pc;            /* Address of a freeblock within pPage->aData[] */
  int hdr;           /* Offset to beginning of page header */
  u8 *data;          /* Equal to pPage->aData */
  BtShared *pBt;        /* The main btree structure */
................................................................................
** If the noContent flag is set, it means that we do not care about
** the content of the page at this time.  So do not go to the disk
** to fetch the content.  Just fill in the content with zeros for now.
** If in the future we call sqlite3PagerWrite() on this page, that
** means we have started to be concerned about content and the disk
** read should occur at that point.
*/
static int sqlite3BtreeGetPage(
  BtShared *pBt,       /* The btree */
  Pgno pgno,           /* Number of the page to fetch */
  MemPage **ppPage,    /* Return the page in this parameter */
  int noContent        /* Do not load page content if true */
){
  int rc;
  MemPage *pPage;
................................................................................
/*
** Open a database file.
** 
** zFilename is the name of the database file.  If zFilename is NULL
** a new database with a random name is created.  This randomly named
** database file will be deleted when sqlite3BtreeClose() is called.
*/
static int sqlite3BtreeOpen(
  const char *zFilename,  /* Name of the file containing the BTree database */
  sqlite3 *pSqlite,       /* Associated database handle */
  Btree **ppBtree,        /* Pointer to new Btree object written here */
  int flags               /* Options */
){
  BtShared *pBt;          /* Shared part of btree structure */
  Btree *p;               /* Handle to return */
................................................................................
    nReserve = zDbHeader[20];
    pBt->maxEmbedFrac = zDbHeader[21];
    pBt->minEmbedFrac = zDbHeader[22];
    pBt->minLeafFrac = zDbHeader[23];
    pBt->pageSizeFixed = 1;
#ifndef SQLITE_OMIT_AUTOVACUUM
    pBt->autoVacuum = (get4byte(&zDbHeader[36 + 4*4])?1:0);

#endif
  }
  pBt->usableSize = pBt->pageSize - nReserve;
  assert( (pBt->pageSize & 7)==0 );  /* 8-byte alignment of pageSize */
  sqlite3PagerSetPagesize(pBt->pPager, pBt->pageSize);

#if !defined(SQLITE_OMIT_SHARED_CACHE) && !defined(SQLITE_OMIT_DISKIO)
................................................................................
  }
  return rc;
}

/*
** Close an open database and invalidate all cursors.
*/
static int sqlite3BtreeClose(Btree *p){
  BtShared *pBt = p->pBt;
  BtCursor *pCur;

#ifndef SQLITE_OMIT_SHARED_CACHE
  ThreadData *pTsd;
#endif

................................................................................
  sqliteFree(pBt);
  return SQLITE_OK;
}

/*
** Change the busy handler callback function.
*/
static int sqlite3BtreeSetBusyHandler(Btree *p, BusyHandler *pHandler){
  BtShared *pBt = p->pBt;
  pBt->pBusyHandler = pHandler;
  sqlite3PagerSetBusyhandler(pBt->pPager, pHandler);
  return SQLITE_OK;
}

/*
................................................................................
** and the database cannot be corrupted if this program
** crashes.  But if the operating system crashes or there is
** an abrupt power failure when synchronous is off, the database
** could be left in an inconsistent and unrecoverable state.
** Synchronous is on by default so database corruption is not
** normally a worry.
*/
static int sqlite3BtreeSetCacheSize(Btree *p, int mxPage){
  BtShared *pBt = p->pBt;
  sqlite3PagerSetCachesize(pBt->pPager, mxPage);
  return SQLITE_OK;
}

/*
** Change the way data is synced to disk in order to increase or decrease
................................................................................
** how well the database resists damage due to OS crashes and power
** failures.  Level 1 is the same as asynchronous (no syncs() occur and
** there is a high probability of damage)  Level 2 is the default.  There
** is a very low but non-zero probability of damage.  Level 3 reduces the
** probability of damage to near zero but with a write performance reduction.
*/
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
static int sqlite3BtreeSetSafetyLevel(Btree *p, int level, int fullSync){
  BtShared *pBt = p->pBt;
  sqlite3PagerSetSafetyLevel(pBt->pPager, level, fullSync);
  return SQLITE_OK;
}
#endif

/*
** Return TRUE if the given btree is set to safety level 1.  In other
** words, return TRUE if no sync() occurs on the disk files.
*/
static int sqlite3BtreeSyncDisabled(Btree *p){
  BtShared *pBt = p->pBt;
  assert( pBt && pBt->pPager );
  return sqlite3PagerNosync(pBt->pPager);
}

#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) || !defined(SQLITE_OMIT_VACUUM)
/*
................................................................................
** of the database file used for locking (beginning at PENDING_BYTE,
** the first byte past the 1GB boundary, 0x40000000) needs to occur
** at the beginning of a page.
**
** If parameter nReserve is less than zero, then the number of reserved
** bytes per page is left unchanged.
*/
static int sqlite3BtreeSetPageSize(Btree *p, int pageSize, int nReserve){
  BtShared *pBt = p->pBt;
  if( pBt->pageSizeFixed ){
    return SQLITE_READONLY;
  }
  if( nReserve<0 ){
    nReserve = pBt->pageSize - pBt->usableSize;
  }
................................................................................
  pBt->usableSize = pBt->pageSize - nReserve;
  return SQLITE_OK;
}

/*
** Return the currently defined page size
*/
static int sqlite3BtreeGetPageSize(Btree *p){
  return p->pBt->pageSize;
}
static int sqlite3BtreeGetReserve(Btree *p){
  return p->pBt->pageSize - p->pBt->usableSize;
}

/*
** Set the maximum page count for a database if mxPage is positive.
** No changes are made if mxPage is 0 or negative.
** Regardless of the value of mxPage, return the maximum page count.
*/
static int sqlite3BtreeMaxPageCount(Btree *p, int mxPage){
  return sqlite3PagerMaxPageCount(p->pBt->pPager, mxPage);
}
#endif /* !defined(SQLITE_OMIT_PAGER_PRAGMAS) || !defined(SQLITE_OMIT_VACUUM) */

/*
** Change the 'auto-vacuum' property of the database. If the 'autoVacuum'
** parameter is non-zero, then auto-vacuum mode is enabled. If zero, it
** is disabled. The default value for the auto-vacuum property is 
** determined by the SQLITE_DEFAULT_AUTOVACUUM macro.
*/
static int sqlite3BtreeSetAutoVacuum(Btree *p, int autoVacuum){
#ifdef SQLITE_OMIT_AUTOVACUUM
  return SQLITE_READONLY;
#else
  BtShared *pBt = p->pBt;
  int av = (autoVacuum?1:0);
  int iv = (autoVacuum==BTREE_AUTOVACUUM_INCR?1:0);
  if( pBt->pageSizeFixed && av!=pBt->autoVacuum ){
    return SQLITE_READONLY;
  }
  pBt->autoVacuum = av;
  pBt->incrVacuum = iv;
  return SQLITE_OK;
#endif
}

/*
** Return the value of the 'auto-vacuum' property. If auto-vacuum is 
** enabled 1 is returned. Otherwise 0.
*/
static int sqlite3BtreeGetAutoVacuum(Btree *p){
#ifdef SQLITE_OMIT_AUTOVACUUM
  return BTREE_AUTOVACUUM_NONE;
#else
  return (
    (!p->pBt->autoVacuum)?BTREE_AUTOVACUUM_NONE:
    (!p->pBt->incrVacuum)?BTREE_AUTOVACUUM_FULL:
    BTREE_AUTOVACUUM_INCR
................................................................................
      goto page1_init_failed;
    }
    pBt->maxEmbedFrac = page1[21];
    pBt->minEmbedFrac = page1[22];
    pBt->minLeafFrac = page1[23];
#ifndef SQLITE_OMIT_AUTOVACUUM
    pBt->autoVacuum = (get4byte(&page1[36 + 4*4])?1:0);

#endif
  }

  /* maxLocal is the maximum amount of payload to store locally for
  ** a cell.  Make sure it is small enough so that at least minFanout
  ** cells can will fit on one page.  We assume a 10-byte page header.
  ** Besides the payload, the cell must store:
................................................................................
  data[22] = pBt->minEmbedFrac;
  data[23] = pBt->minLeafFrac;
  memset(&data[24], 0, 100-24);
  zeroPage(pP1, PTF_INTKEY|PTF_LEAF|PTF_LEAFDATA );
  pBt->pageSizeFixed = 1;
#ifndef SQLITE_OMIT_AUTOVACUUM
  assert( pBt->autoVacuum==1 || pBt->autoVacuum==0 );

  put4byte(&data[36 + 4*4], pBt->autoVacuum);

#endif
  return SQLITE_OK;
}

/*
** Attempt to start a new transaction. A write-transaction
** is started if the second argument is nonzero, otherwise a read-
................................................................................
** a reserved lock.  B tries to promote to exclusive but is blocked because
** of A's read lock.  A tries to promote to reserved but is blocked by B.
** One or the other of the two processes must give way or there can be
** no progress.  By returning SQLITE_BUSY and not invoking the busy callback
** when A already has a read lock, we encourage A to give up and let B
** proceed.
*/
static int sqlite3BtreeBeginTrans(Btree *p, int wrflag){
  BtShared *pBt = p->pBt;
  int rc = SQLITE_OK;

  btreeIntegrity(p);

  /* If the btree is already in a write-transaction, or it
  ** is already in a read-transaction and a read-transaction
................................................................................
** A write-transaction must be opened before calling this function.
** It performs a single unit of work towards an incremental vacuum.
**
** If the incremental vacuum is finished after this function has run,
** SQLITE_DONE is returned. If it is not finished, but no error occured,
** SQLITE_OK is returned. Otherwise an SQLite error code. 
*/
static int sqlite3BtreeIncrVacuum(Btree *p){
  BtShared *pBt = p->pBt;
  assert( pBt->inTransaction==TRANS_WRITE && p->inTrans==TRANS_WRITE );
  if( !pBt->autoVacuum ){
    return SQLITE_DONE;
  }
  invalidateAllOverflowCache(pBt);
  return incrVacuumStep(pBt, 0);
................................................................................
**
** When this is called, the master journal should already have been
** created, populated with this journal pointer and synced to disk.
**
** Once this is routine has returned, the only thing required to commit
** the write-transaction for this database file is to delete the journal.
*/
static int sqlite3BtreeCommitPhaseOne(Btree *p, const char *zMaster){
  int rc = SQLITE_OK;
  if( p->inTrans==TRANS_WRITE ){
    BtShared *pBt = p->pBt;
    Pgno nTrunc = 0;
#ifndef SQLITE_OMIT_AUTOVACUUM
    if( pBt->autoVacuum ){
      rc = autoVacuumCommit(pBt, &nTrunc); 
................................................................................
** contents so that they are written onto the disk platter.  All this
** routine has to do is delete or truncate the rollback journal
** (which causes the transaction to commit) and drop locks.
**
** This will release the write lock on the database file.  If there
** are no active cursors, it also releases the read lock.
*/
static int sqlite3BtreeCommitPhaseTwo(Btree *p){
  BtShared *pBt = p->pBt;

  btreeIntegrity(p);

  /* If the handle has a write-transaction open, commit the shared-btrees 
  ** transaction and set the shared state to TRANS_READ.
  */
................................................................................
  btreeIntegrity(p);
  return SQLITE_OK;
}

/*
** Do both phases of a commit.
*/
static int sqlite3BtreeCommit(Btree *p){
  int rc;
  rc = sqlite3BtreeCommitPhaseOne(p, 0);
  if( rc==SQLITE_OK ){
    rc = sqlite3BtreeCommitPhaseTwo(p);
  }
  return rc;
}
................................................................................
** invalided by this operation.  Any attempt to use a cursor
** that was open at the beginning of this operation will result
** in an error.
**
** This will release the write lock on the database file.  If there
** are no active cursors, it also releases the read lock.
*/
static int sqlite3BtreeRollback(Btree *p){
  int rc;
  BtShared *pBt = p->pBt;
  MemPage *pPage1;

  rc = saveAllCursors(pBt, 0, 0);
#ifndef SQLITE_OMIT_SHARED_CACHE
  if( rc!=SQLITE_OK ){
................................................................................
** to start a new subtransaction if another subtransaction is already active.
**
** Statement subtransactions are used around individual SQL statements
** that are contained within a BEGIN...COMMIT block.  If a constraint
** error occurs within the statement, the effect of that one statement
** can be rolled back without having to rollback the entire transaction.
*/
static int sqlite3BtreeBeginStmt(Btree *p){
  int rc;
  BtShared *pBt = p->pBt;
  if( (p->inTrans!=TRANS_WRITE) || pBt->inStmt ){
    return pBt->readOnly ? SQLITE_READONLY : SQLITE_ERROR;
  }
  assert( pBt->inTransaction==TRANS_WRITE );
  rc = pBt->readOnly ? SQLITE_OK : sqlite3PagerStmtBegin(pBt->pPager);
................................................................................
}


/*
** Commit the statment subtransaction currently in progress.  If no
** subtransaction is active, this is a no-op.
*/
static int sqlite3BtreeCommitStmt(Btree *p){
  int rc;
  BtShared *pBt = p->pBt;
  if( pBt->inStmt && !pBt->readOnly ){
    rc = sqlite3PagerStmtCommit(pBt->pPager);
  }else{
    rc = SQLITE_OK;
  }
................................................................................
** Rollback the active statement subtransaction.  If no subtransaction
** is active this routine is a no-op.
**
** All cursors will be invalidated by this operation.  Any attempt
** to use a cursor that was open at the beginning of this operation
** will result in an error.
*/
static int sqlite3BtreeRollbackStmt(Btree *p){
  int rc = SQLITE_OK;
  BtShared *pBt = p->pBt;
  sqlite3MallocDisallow();
  if( pBt->inStmt && !pBt->readOnly ){
    rc = sqlite3PagerStmtRollback(pBt->pPager);
    assert( countWriteCursors(pBt)==0 );
    pBt->inStmt = 0;
................................................................................
**
** The comparison function must be logically the same for every cursor
** on a particular table.  Changing the comparison function will result
** in incorrect operations.  If the comparison function is NULL, a
** default comparison function is used.  The comparison function is
** always ignored for INTKEY tables.
*/
static int sqlite3BtreeCursor(
  Btree *p,                                   /* The btree */
  int iTable,                                 /* Root page of table to open */
  int wrFlag,                                 /* 1 to write. 0 read-only */
  int (*xCmp)(void*,int,const void*,int,const void*), /* Key Comparison func */
  void *pArg,                                 /* First arg to xCompare() */
  BtCursor **ppCur                            /* Write new cursor here */
){
................................................................................
  return rc;
}

/*
** Close a cursor.  The read lock on the database file is released
** when the last cursor is closed.
*/
static int sqlite3BtreeCloseCursor(BtCursor *pCur){
  BtShared *pBt = pCur->pBtree->pBt;
  clearCursorPosition(pCur);
  if( pCur->pPrev ){
    pCur->pPrev->pNext = pCur->pNext;
  }else{
    pBt->pCursor = pCur->pNext;
  }
................................................................................
  return SQLITE_OK;
}

/*
** Make a temporary cursor by filling in the fields of pTempCur.
** The temporary cursor is not on the cursor list for the Btree.
*/
static void sqlite3BtreeGetTempCursor(BtCursor *pCur, BtCursor *pTempCur){
  memcpy(pTempCur, pCur, sizeof(*pCur));
  pTempCur->pNext = 0;
  pTempCur->pPrev = 0;
  if( pTempCur->pPage ){
    sqlite3PagerRef(pTempCur->pPage->pDbPage);
  }
}

/*
** Delete a temporary cursor such as was made by the CreateTemporaryCursor()
** function above.
*/
static void sqlite3BtreeReleaseTempCursor(BtCursor *pCur){
  if( pCur->pPage ){
    sqlite3PagerUnref(pCur->pPage->pDbPage);
  }
}

/*
** The GET_CELL_INFO() macro. Takes one argument, a pointer to a valid
** btree cursor (type BtCursor*).  This macro makes sure the BtCursor.info
** field of the given cursor is valid.  If it is not already valid, call
** sqlite3BtreeParseCell() to fill it in.
**
** BtCursor.info is a cache of the information in the current cell.
** Using this cache reduces the number of calls to sqlite3BtreeParseCell().







*/
#ifndef NDEBUG
  static void assertCellInfo(BtCursor *pCur){
    CellInfo info;
    memset(&info, 0, sizeof(info));
    sqlite3BtreeParseCell(pCur->pPage, pCur->idx, &info);
    assert( memcmp(&info, &pCur->info, sizeof(info))==0 );
  }
#else
  #define assertCellInfo(x)
#endif











#define GET_CELL_INFO(pCur)                                             \
  if( pCur->info.nSize==0 )                                             \

    sqlite3BtreeParseCell(pCur->pPage, pCur->idx, &pCur->info);         \
  else                                                                  \
    assertCellInfo(pCur);
   


/*
** Set *pSize to the size of the buffer needed to hold the value of
** the key for the current entry.  If the cursor is not pointing
** to a valid entry, *pSize is set to 0. 
**
** For a table with the INTKEY flag set, this routine returns the key
** itself, not the number of bytes in the key.
*/
static int sqlite3BtreeKeySize(BtCursor *pCur, i64 *pSize){
  int rc = restoreOrClearCursorPosition(pCur);
  if( rc==SQLITE_OK ){
    assert( pCur->eState==CURSOR_INVALID || pCur->eState==CURSOR_VALID );
    if( pCur->eState==CURSOR_INVALID ){
      *pSize = 0;
    }else{
      GET_CELL_INFO(pCur);
      *pSize = pCur->info.nKey;
    }
  }
  return rc;
}

/*
** Set *pSize to the number of bytes of data in the entry the
** cursor currently points to.  Always return SQLITE_OK.
** Failure is not possible.  If the cursor is not currently
** pointing to an entry (which can happen, for example, if
** the database is empty) then *pSize is set to 0.
*/
static int sqlite3BtreeDataSize(BtCursor *pCur, u32 *pSize){
  int rc = restoreOrClearCursorPosition(pCur);
  if( rc==SQLITE_OK ){
    assert( pCur->eState==CURSOR_INVALID || pCur->eState==CURSOR_VALID );
    if( pCur->eState==CURSOR_INVALID ){
      /* Not pointing at a valid entry - set *pSize to 0. */
      *pSize = 0;
    }else{
      GET_CELL_INFO(pCur);
      *pSize = pCur->info.nData;
    }
  }
  return rc;
}

/*
................................................................................
  BtShared *pBt = pCur->pBtree->pBt;   /* Btree this cursor belongs to */

  assert( pPage );
  assert( pCur->eState==CURSOR_VALID );
  assert( pCur->idx>=0 && pCur->idx<pPage->nCell );
  assert( offset>=0 );

  GET_CELL_INFO(pCur);
  aPayload = pCur->info.pCell + pCur->info.nHeader;
  nKey = (pPage->intKey ? 0 : pCur->info.nKey);

  if( skipKey ){
    offset += nKey;
  }
  if( offset+amt > nKey+pCur->info.nData ){
................................................................................
** "amt" bytes will be transfered into pBuf[].  The transfer
** begins at "offset".
**
** Return SQLITE_OK on success or an error code if anything goes
** wrong.  An error is returned if "offset+amt" is larger than
** the available payload.
*/
static int sqlite3BtreeKey(BtCursor *pCur, u32 offset, u32 amt, void *pBuf){
  int rc = restoreOrClearCursorPosition(pCur);
  if( rc==SQLITE_OK ){
    assert( pCur->eState==CURSOR_VALID );
    assert( pCur->pPage!=0 );
    if( pCur->pPage->intKey ){
      return SQLITE_CORRUPT_BKPT;
    }
................................................................................
** "amt" bytes will be transfered into pBuf[].  The transfer
** begins at "offset".
**
** Return SQLITE_OK on success or an error code if anything goes
** wrong.  An error is returned if "offset+amt" is larger than
** the available payload.
*/
static int sqlite3BtreeData(BtCursor *pCur, u32 offset, u32 amt, void *pBuf){
  int rc = restoreOrClearCursorPosition(pCur);
  if( rc==SQLITE_OK ){
    assert( pCur->eState==CURSOR_VALID );
    assert( pCur->pPage!=0 );
    assert( pCur->idx>=0 && pCur->idx<pCur->pPage->nCell );
    rc = accessPayload(pCur, offset, amt, pBuf, 1, 0);
  }
................................................................................
  u32 nKey;
  int nLocal;

  assert( pCur!=0 && pCur->pPage!=0 );
  assert( pCur->eState==CURSOR_VALID );
  pPage = pCur->pPage;
  assert( pCur->idx>=0 && pCur->idx<pPage->nCell );
  GET_CELL_INFO(pCur);
  aPayload = pCur->info.pCell;
  aPayload += pCur->info.nHeader;
  if( pPage->intKey ){
    nKey = 0;
  }else{
    nKey = pCur->info.nKey;
  }
................................................................................
**
** The pointer returned is ephemeral.  The key/data may move
** or be destroyed on the next call to any Btree routine.
**
** These routines is used to get quick access to key and data
** in the common case where no overflow pages are used.
*/
static const void *sqlite3BtreeKeyFetch(BtCursor *pCur, int *pAmt){
  if( pCur->eState==CURSOR_VALID ){
    return (const void*)fetchPayload(pCur, pAmt, 0);
  }
  return 0;
}
static const void *sqlite3BtreeDataFetch(BtCursor *pCur, int *pAmt){
  if( pCur->eState==CURSOR_VALID ){
    return (const void*)fetchPayload(pCur, pAmt, 1);
  }
  return 0;
}


................................................................................
**
** The virtual root page is the root page for most tables.  But
** for the table rooted on page 1, sometime the real root page
** is empty except for the right-pointer.  In such cases the
** virtual root page is the page that the right-pointer of page
** 1 is pointing to.
*/
static int sqlite3BtreeIsRootPage(MemPage *pPage){
  MemPage *pParent = pPage->pParent;
  if( pParent==0 ) return 1;
  if( pParent->pgno>1 ) return 0;
  if( get2byte(&pParent->aData[pParent->hdrOffset+3])==0 ) return 1;
  return 0;
}

................................................................................
** Move the cursor up to the parent page.
**
** pCur->idx is set to the cell index that contains the pointer
** to the page we are coming from.  If we are coming from the
** right-most child page then pCur->idx is set to one more than
** the largest cell index.
*/
static void sqlite3BtreeMoveToParent(BtCursor *pCur){
  MemPage *pParent;
  MemPage *pPage;
  int idxParent;

  assert( pCur->eState==CURSOR_VALID );
  pPage = pCur->pPage;
  assert( pPage!=0 );
................................................................................
  return SQLITE_OK;
}

/* Move the cursor to the first entry in the table.  Return SQLITE_OK
** on success.  Set *pRes to 0 if the cursor actually points to something
** or set *pRes to 1 if the table is empty.
*/
static int sqlite3BtreeFirst(BtCursor *pCur, int *pRes){
  int rc;
  rc = moveToRoot(pCur);
  if( rc ) return rc;
  if( pCur->eState==CURSOR_INVALID ){
    assert( pCur->pPage->nCell==0 );
    *pRes = 1;
    return SQLITE_OK;
................................................................................
  return rc;
}

/* Move the cursor to the last entry in the table.  Return SQLITE_OK
** on success.  Set *pRes to 0 if the cursor actually points to something
** or set *pRes to 1 if the table is empty.
*/
static int sqlite3BtreeLast(BtCursor *pCur, int *pRes){
  int rc;
  rc = moveToRoot(pCur);
  if( rc ) return rc;
  if( CURSOR_INVALID==pCur->eState ){
    assert( pCur->pPage->nCell==0 );
    *pRes = 1;
    return SQLITE_OK;
................................................................................
**
**     *pRes==0     The cursor is left pointing at an entry that
**                  exactly matches pKey.
**
**     *pRes>0      The cursor is left pointing at an entry that
**                  is larger than pKey.
*/
static int sqlite3BtreeMoveto(
  BtCursor *pCur,        /* The cursor to be moved */
  const void *pKey,      /* The key content for indices.  Not used by tables */
  i64 nKey,              /* Size of pKey.  Or the key for tables */
  int biasRight,         /* If true, bias the search to the high end */
  int *pRes              /* Search result flag */
){
  int rc;
................................................................................
/*
** Return TRUE if the cursor is not pointing at an entry of the table.
**
** TRUE will be returned after a call to sqlite3BtreeNext() moves
** past the last entry in the table or sqlite3BtreePrev() moves past
** the first entry.  TRUE is also returned if the table is empty.
*/
static int sqlite3BtreeEof(BtCursor *pCur){
  /* TODO: What if the cursor is in CURSOR_REQUIRESEEK but all table entries
  ** have been deleted? This API will need to change to return an error code
  ** as well as the boolean result value.
  */
  return (CURSOR_VALID!=pCur->eState);
}

/*
** Advance the cursor to the next entry in the database.  If
** successful then set *pRes=0.  If the cursor
** was already pointing to the last entry in the database before
** this routine was called, then set *pRes=1.
*/
static int sqlite3BtreeNext(BtCursor *pCur, int *pRes){
  int rc;
  MemPage *pPage;

  rc = restoreOrClearCursorPosition(pCur);
  if( rc!=SQLITE_OK ){
    return rc;
  }
................................................................................

/*
** Step the cursor to the back to the previous entry in the database.  If
** successful then set *pRes=0.  If the cursor
** was already pointing to the first entry in the database before
** this routine was called, then set *pRes=1.
*/
static int sqlite3BtreePrevious(BtCursor *pCur, int *pRes){
  int rc;
  Pgno pgno;
  MemPage *pPage;

  rc = restoreOrClearCursorPosition(pCur);
  if( rc!=SQLITE_OK ){
    return rc;
................................................................................
** and the data is given by (pData,nData).  The cursor is used only to
** define what table the record should be inserted into.  The cursor
** is left pointing at a random location.
**
** For an INTKEY table, only the nKey value of the key is used.  pKey is
** ignored.  For a ZERODATA table, the pData and nData are both ignored.
*/
static int sqlite3BtreeInsert(
  BtCursor *pCur,                /* Insert data into the table of this cursor */
  const void *pKey, i64 nKey,    /* The key of the new record */
  const void *pData, int nData,  /* The data of the new record */
  int nZero,                     /* Number of extra 0 bytes to append to data */
  int appendBias                 /* True if this is likely an append */
){
  int rc;
................................................................................
  return rc;
}

/*
** Delete the entry that the cursor is pointing to.  The cursor
** is left pointing at a random location.
*/
static int sqlite3BtreeDelete(BtCursor *pCur){
  MemPage *pPage = pCur->pPage;
  unsigned char *pCell;
  int rc;
  Pgno pgnoChild = 0;
  BtShared *pBt = pCur->pBtree->pBt;

  assert( pPage->isInit );
................................................................................
** The type of type is determined by the flags parameter.  Only the
** following values of flags are currently in use.  Other values for
** flags might not work:
**
**     BTREE_INTKEY|BTREE_LEAFDATA     Used for SQL tables with rowid keys
**     BTREE_ZERODATA                  Used for SQL indices
*/
static int sqlite3BtreeCreateTable(Btree *p, int *piTable, int flags){
  BtShared *pBt = p->pBt;
  MemPage *pRoot;
  Pgno pgnoRoot;
  int rc;
  if( pBt->inTransaction!=TRANS_WRITE ){
    /* Must start a transaction first */
    return pBt->readOnly ? SQLITE_READONLY : SQLITE_ERROR;
................................................................................
** the page number of the root of the table.  After this routine returns,
** the root page is empty, but still exists.
**
** This routine will fail with SQLITE_LOCKED if there are any open
** read cursors on the table.  Open write cursors are moved to the
** root of the table.
*/
static int sqlite3BtreeClearTable(Btree *p, int iTable){
  int rc;
  BtShared *pBt = p->pBt;
  if( p->inTrans!=TRANS_WRITE ){
    return pBt->readOnly ? SQLITE_READONLY : SQLITE_ERROR;
  }
  rc = checkReadLocks(p, iTable, 0);
  if( rc ){
................................................................................
** root pages are kept at the beginning of the database file, which
** is necessary for AUTOVACUUM to work right.  *piMoved is set to the 
** page number that used to be the last root page in the file before
** the move.  If no page gets moved, *piMoved is set to 0.
** The last root page is recorded in meta[3] and the value of
** meta[3] is updated by this procedure.
*/
static int sqlite3BtreeDropTable(Btree *p, int iTable, int *piMoved){
  int rc;
  MemPage *pPage = 0;
  BtShared *pBt = p->pBt;

  if( p->inTrans!=TRANS_WRITE ){
    return pBt->readOnly ? SQLITE_READONLY : SQLITE_ERROR;
  }
................................................................................
** through meta[15] are available for use by higher layers.  Meta[0]
** is read-only, the others are read/write.
** 
** The schema layer numbers meta values differently.  At the schema
** layer (and the SetCookie and ReadCookie opcodes) the number of
** free pages is not visible.  So Cookie[0] is the same as Meta[1].
*/
static int sqlite3BtreeGetMeta(Btree *p, int idx, u32 *pMeta){
  DbPage *pDbPage;
  int rc;
  unsigned char *pP1;
  BtShared *pBt = p->pBt;

  /* Reading a meta-data value requires a read-lock on page 1 (and hence
  ** the sqlite_master table. We grab this lock regardless of whether or
................................................................................
  return rc;
}

/*
** Write meta-information back into the database.  Meta[0] is
** read-only and may not be written.
*/
static int sqlite3BtreeUpdateMeta(Btree *p, int idx, u32 iMeta){
  BtShared *pBt = p->pBt;
  unsigned char *pP1;
  int rc;
  assert( idx>=1 && idx<=15 );
  if( p->inTrans!=TRANS_WRITE ){
    return pBt->readOnly ? SQLITE_READONLY : SQLITE_ERROR;
  }
  assert( pBt->pPage1!=0 );
  pP1 = pBt->pPage1->aData;
  rc = sqlite3PagerWrite(pBt->pPage1->pDbPage);
  if( rc ) return rc;
  put4byte(&pP1[36 + idx*4], iMeta);





  return SQLITE_OK;
}

/*
** Return the flag byte at the beginning of the page that the cursor
** is currently pointing to.
*/
static int sqlite3BtreeFlags(BtCursor *pCur){
  /* TODO: What about CURSOR_REQUIRESEEK state? Probably need to call
  ** restoreOrClearCursorPosition() here.
  */
  MemPage *pPage = pCur->pPage;
  return pPage ? pPage->aData[pPage->hdrOffset] : 0;
}


/*
** Return the pager associated with a BTree.  This routine is used for
** testing and debugging only.
*/
static Pager *sqlite3BtreePager(Btree *p){
  return p->pBt->pPager;
}

#ifndef SQLITE_OMIT_INTEGRITY_CHECK
/*
** Append a message to the error message string.
*/
................................................................................
** a table.  nRoot is the number of entries in aRoot.
**
** If everything checks out, this routine returns NULL.  If something is
** amiss, an error message is written into memory obtained from malloc()
** and a pointer to that error message is returned.  The calling function
** is responsible for freeing the error message when it is done.
*/
static char *sqlite3BtreeIntegrityCheck(
  Btree *p,     /* The btree to be checked */
  int *aRoot,   /* An array of root pages numbers for individual trees */
  int nRoot,    /* Number of entries in aRoot[] */
  int mxErr,    /* Stop reporting errors after this many */
  int *pnErr    /* Write number of errors seen to this variable */
){
  int i;
................................................................................
  return sCheck.zErrMsg;
}
#endif /* SQLITE_OMIT_INTEGRITY_CHECK */

/*
** Return the full pathname of the underlying database file.
*/
static const char *sqlite3BtreeGetFilename(Btree *p){
  assert( p->pBt->pPager!=0 );
  return sqlite3PagerFilename(p->pBt->pPager);
}

/*
** Return the pathname of the directory that contains the database file.
*/
static const char *sqlite3BtreeGetDirname(Btree *p){
  assert( p->pBt->pPager!=0 );
  return sqlite3PagerDirname(p->pBt->pPager);
}

/*
** Return the pathname of the journal file for this database. The return
** value of this routine is the same regardless of whether the journal file
** has been created or not.
*/
static const char *sqlite3BtreeGetJournalname(Btree *p){
  assert( p->pBt->pPager!=0 );
  return sqlite3PagerJournalname(p->pBt->pPager);
}

#ifndef SQLITE_OMIT_VACUUM
/*
** Copy the complete content of pBtFrom into pBtTo.  A transaction
** must be active for both files.
**
** The size of file pBtFrom may be reduced by this operation.
** If anything goes wrong, the transaction on pBtFrom is rolled back.
*/
static int sqlite3BtreeCopyFile(Btree *pTo, Btree *pFrom){
  int rc = SQLITE_OK;
  Pgno i, nPage, nToPage, iSkip;

  BtShared *pBtTo = pTo->pBt;
  BtShared *pBtFrom = pFrom->pBt;

  if( pTo->inTrans!=TRANS_WRITE || pFrom->inTrans!=TRANS_WRITE ){
................................................................................
  return rc;  
}
#endif /* SQLITE_OMIT_VACUUM */

/*
** Return non-zero if a transaction is active.
*/
static int sqlite3BtreeIsInTrans(Btree *p){
  return (p && (p->inTrans==TRANS_WRITE));
}

/*
** Return non-zero if a statement transaction is active.
*/
static int sqlite3BtreeIsInStmt(Btree *p){
  return (p->pBt && p->pBt->inStmt);
}

/*
** Return non-zero if a read (or write) transaction is active.
*/
static int sqlite3BtreeIsInReadTrans(Btree *p){
  return (p && (p->inTrans!=TRANS_NONE));
}

/*
** This function returns a pointer to a blob of memory associated with
** a single shared-btree. The memory is used by client code for it's own
** purposes (for example, to store a high-level schema associated with 
................................................................................
** of memory returned. 
**
** Just before the shared-btree is closed, the function passed as the 
** xFree argument when the memory allocation was made is invoked on the 
** blob of allocated memory. This function should not call sqliteFree()
** on the memory, the btree layer does that.
*/
static void *sqlite3BtreeSchema(Btree *p, int nBytes, void(*xFree)(void *)){
  BtShared *pBt = p->pBt;
  if( !pBt->pSchema ){
    pBt->pSchema = sqliteMalloc(nBytes);
    pBt->xFreeSchema = xFree;
  }
  return pBt->pSchema;
}

/*
** Return true if another user of the same shared btree as the argument
** handle holds an exclusive lock on the sqlite_master table.
*/
static int sqlite3BtreeSchemaLocked(Btree *p){
  return (queryTableLock(p, MASTER_ROOT, READ_LOCK)!=SQLITE_OK);
}


#ifndef SQLITE_OMIT_SHARED_CACHE
/*
** Obtain a lock on the table whose root page is iTab.  The
** lock is a write lock if isWritelock is true or a read lock
** if it is false.
*/
static int sqlite3BtreeLockTable(Btree *p, int iTab, u8 isWriteLock){
  int rc = SQLITE_OK;
  u8 lockType = (isWriteLock?WRITE_LOCK:READ_LOCK);
  rc = queryTableLock(p, iTab, lockType);
  if( rc==SQLITE_OK ){
    rc = lockTable(p, iTab, lockType);
  }
  return rc;
................................................................................
/*
** Argument pCsr must be a cursor opened for writing on an 
** INTKEY table currently pointing at a valid table entry. 
** This function modifies the data stored as part of that entry.
** Only the data content may only be modified, it is not possible
** to change the length of the data stored.
*/
static int sqlite3BtreePutData(BtCursor *pCsr, u32 offset, u32 amt, void *z){

  assert(pCsr->isIncrblobHandle);
  if( pCsr->eState==CURSOR_REQUIRESEEK ){
    return SQLITE_ABORT;
  }

  /* Check some preconditions: 
................................................................................
** for incremental blob IO only.
**
** This function sets a flag only. The actual page location cache
** (stored in BtCursor.aOverflow[]) is allocated and used by function
** accessPayload() (the worker function for sqlite3BtreeData() and
** sqlite3BtreePutData()).
*/
static void sqlite3BtreeCacheOverflow(BtCursor *pCur){
  assert(!pCur->isIncrblobHandle);
  assert(!pCur->aOverflow);
  pCur->isIncrblobHandle = 1;
}
#endif

/************** End of btree.c ***********************************************/
................................................................................
  }
  return pPage;
}

/*
** Initialize a Fifo structure.
*/
static void sqlite3VdbeFifoInit(Fifo *pFifo){
  memset(pFifo, 0, sizeof(*pFifo));
}

/*
** Push a single 64-bit integer value into the Fifo.  Return SQLITE_OK
** normally.   SQLITE_NOMEM is returned if we are unable to allocate
** memory.
*/
static int sqlite3VdbeFifoPush(Fifo *pFifo, i64 val){
  FifoPage *pPage;
  pPage = pFifo->pLast;
  if( pPage==0 ){
    pPage = pFifo->pLast = pFifo->pFirst = allocateFifoPage(20);
    if( pPage==0 ){
      return SQLITE_NOMEM;
    }
................................................................................
}

/*
** Extract a single 64-bit integer value from the Fifo.  The integer
** extracted is the one least recently inserted.  If the Fifo is empty
** return SQLITE_DONE.
*/
static int sqlite3VdbeFifoPop(Fifo *pFifo, i64 *pVal){
  FifoPage *pPage;
  if( pFifo->nEntry==0 ){
    return SQLITE_DONE;
  }
  assert( pFifo->nEntry>0 );
  pPage = pFifo->pFirst;
  assert( pPage!=0 );
................................................................................
  return SQLITE_OK;
}

/*
** Delete all information from a Fifo object.   Free all memory held
** by the Fifo.
*/
static void sqlite3VdbeFifoClear(Fifo *pFifo){
  FifoPage *pPage, *pNextPage;
  for(pPage=pFifo->pFirst; pPage; pPage=pNextPage){
    pNextPage = pPage->pNext;
    sqliteFree(pPage);
  }
  sqlite3VdbeFifoInit(pFifo);
}
................................................................................
** representation is already stored using the requested encoding, then this
** routine is a no-op.
**
** SQLITE_OK is returned if the conversion is successful (or not required).
** SQLITE_NOMEM may be returned if a malloc() fails during conversion
** between formats.
*/
static int sqlite3VdbeChangeEncoding(Mem *pMem, int desiredEnc){
  int rc;
  if( !(pMem->flags&MEM_Str) || pMem->enc==desiredEnc ){
    return SQLITE_OK;
  }
#ifdef SQLITE_OMIT_UTF16
  return SQLITE_ERROR;
#else
................................................................................
}

/*
** Make the given Mem object MEM_Dyn.
**
** Return SQLITE_OK on success or SQLITE_NOMEM if malloc fails.
*/
static int sqlite3VdbeMemDynamicify(Mem *pMem){
  int n;
  u8 *z;
  expandBlob(pMem);
  if( (pMem->flags & (MEM_Ephem|MEM_Static|MEM_Short))==0 ){
    return SQLITE_OK;
  }
  assert( (pMem->flags & MEM_Dyn)==0 );
................................................................................
}

/*
** If the given Mem* has a zero-filled tail, turn it into an ordinary
** blob stored in dynamically allocated space.
*/
#ifndef SQLITE_OMIT_INCRBLOB
static int sqlite3VdbeMemExpandBlob(Mem *pMem){
  if( pMem->flags & MEM_Zero ){
    char *pNew;
    int nByte;
    assert( (pMem->flags & MEM_Blob)!=0 );
    nByte = pMem->n + pMem->u.i;
    if( nByte<=0 ) nByte = 1;
    pNew = sqliteMalloc(nByte);
................................................................................

/*
** Make the given Mem object either MEM_Short or MEM_Dyn so that bytes
** of the Mem.z[] array can be modified.
**
** Return SQLITE_OK on success or SQLITE_NOMEM if malloc fails.
*/
static int sqlite3VdbeMemMakeWriteable(Mem *pMem){
  int n;
  u8 *z;
  expandBlob(pMem);
  if( (pMem->flags & (MEM_Ephem|MEM_Static))==0 ){
    return SQLITE_OK;
  }
  assert( (pMem->flags & MEM_Dyn)==0 );
................................................................................
  assert(0==(1&(int)pMem->z));
  return SQLITE_OK;
}

/*
** Make sure the given Mem is \u0000 terminated.
*/
static int sqlite3VdbeMemNulTerminate(Mem *pMem){
  if( (pMem->flags & MEM_Term)!=0 || (pMem->flags & MEM_Str)==0 ){
    return SQLITE_OK;   /* Nothing to do */
  }
  if( pMem->flags & (MEM_Static|MEM_Ephem) ){
    return sqlite3VdbeMemMakeWriteable(pMem);
  }else{
    char *z; 
................................................................................
**
** A MEM_Null value will never be passed to this function. This function is
** used for converting values to text for returning to the user (i.e. via
** sqlite3_value_text()), or for ensuring that values to be used as btree
** keys are strings. In the former case a NULL pointer is returned the
** user and the later is an internal programming error.
*/
static int sqlite3VdbeMemStringify(Mem *pMem, int enc){
  int rc = SQLITE_OK;
  int fg = pMem->flags;
  char *z = pMem->zShort;

  assert( !(fg&MEM_Zero) );
  assert( !(fg&(MEM_Str|MEM_Blob)) );
  assert( fg&(MEM_Int|MEM_Real) );
................................................................................
** Memory cell pMem contains the context of an aggregate function.
** This routine calls the finalize method for that function.  The
** result of the aggregate is stored back into pMem.
**
** Return SQLITE_ERROR if the finalizer reports an error.  SQLITE_OK
** otherwise.
*/
static int sqlite3VdbeMemFinalize(Mem *pMem, FuncDef *pFunc){
  int rc = SQLITE_OK;
  if( pFunc && pFunc->xFinalize ){
    sqlite3_context ctx;
    assert( (pMem->flags & MEM_Null)!=0 || pFunc==pMem->u.pDef );
    ctx.s.flags = MEM_Null;
    ctx.s.z = pMem->zShort;
    ctx.pMem = pMem;
................................................................................
}

/*
** Release any memory held by the Mem. This may leave the Mem in an
** inconsistent state, for example with (Mem.z==0) and
** (Mem.type==SQLITE_TEXT).
*/
static void sqlite3VdbeMemRelease(Mem *p){
  if( p->flags & (MEM_Dyn|MEM_Agg) ){
    if( p->xDel ){
      if( p->flags & MEM_Agg ){
        sqlite3VdbeMemFinalize(p, p->u.pDef);
        assert( (p->flags & MEM_Agg)==0 );
        sqlite3VdbeMemRelease(p);
      }else{
................................................................................
** If pMem is an integer, then the value is exact.  If pMem is
** a floating-point then the value returned is the integer part.
** If pMem is a string or blob, then we make an attempt to convert
** it into a integer and return that.  If pMem is NULL, return 0.
**
** If pMem is a string, its encoding might be changed.
*/
static i64 sqlite3VdbeIntValue(Mem *pMem){
  int flags = pMem->flags;
  if( flags & MEM_Int ){
    return pMem->u.i;
  }else if( flags & MEM_Real ){
    return (i64)pMem->r;
  }else if( flags & (MEM_Str|MEM_Blob) ){
    i64 value;
................................................................................

/*
** Return the best representation of pMem that we can get into a
** double.  If pMem is already a double or an integer, return its
** value.  If it is a string or blob, try to convert it to a double.
** If it is a NULL, return 0.0.
*/
static double sqlite3VdbeRealValue(Mem *pMem){
  if( pMem->flags & MEM_Real ){
    return pMem->r;
  }else if( pMem->flags & MEM_Int ){
    return (double)pMem->u.i;
  }else if( pMem->flags & (MEM_Str|MEM_Blob) ){
    double val = 0.0;
    pMem->flags |= MEM_Str;
................................................................................
  }
}

/*
** The MEM structure is already a MEM_Real.  Try to also make it a
** MEM_Int if we can.
*/
static void sqlite3VdbeIntegerAffinity(Mem *pMem){
  assert( pMem->flags & MEM_Real );
  pMem->u.i = pMem->r;
  if( ((double)pMem->u.i)==pMem->r ){
    pMem->flags |= MEM_Int;
  }
}

/*
** Convert pMem to type integer.  Invalidate any prior representations.
*/
static int sqlite3VdbeMemIntegerify(Mem *pMem){
  pMem->u.i = sqlite3VdbeIntValue(pMem);
  sqlite3VdbeMemRelease(pMem);
  pMem->flags = MEM_Int;
  return SQLITE_OK;
}

/*
** Convert pMem so that it is of type MEM_Real.
** Invalidate any prior representations.
*/
static int sqlite3VdbeMemRealify(Mem *pMem){
  pMem->r = sqlite3VdbeRealValue(pMem);
  sqlite3VdbeMemRelease(pMem);
  pMem->flags = MEM_Real;
  return SQLITE_OK;
}

/*
** Convert pMem so that it has types MEM_Real or MEM_Int or both.
** Invalidate any prior representations.
*/
static int sqlite3VdbeMemNumerify(Mem *pMem){
  double r1, r2;
  i64 i;
  assert( (pMem->flags & (MEM_Int|MEM_Real|MEM_Null))==0 );
  assert( (pMem->flags & (MEM_Blob|MEM_Str))!=0 );
  r1 = sqlite3VdbeRealValue(pMem);
  i = (i64)r1;
  r2 = (double)i;
................................................................................
  }
  return SQLITE_OK;
}

/*
** Delete any previous value and set the value stored in *pMem to NULL.
*/
static void sqlite3VdbeMemSetNull(Mem *pMem){
  sqlite3VdbeMemRelease(pMem);
  pMem->flags = MEM_Null;
  pMem->type = SQLITE_NULL;
  pMem->n = 0;
}

/*
** Delete any previous value and set the value to be a BLOB of length
** n containing all zeros.
*/
static void sqlite3VdbeMemSetZeroBlob(Mem *pMem, int n){
  sqlite3VdbeMemRelease(pMem);
  pMem->flags = MEM_Blob|MEM_Zero|MEM_Short;
  pMem->type = SQLITE_BLOB;
  pMem->n = 0;
  if( n<0 ) n = 0;
  pMem->u.i = n;
  pMem->z = pMem->zShort;
................................................................................
  pMem->enc = SQLITE_UTF8;
}

/*
** Delete any previous value and set the value stored in *pMem to val,
** manifest type INTEGER.
*/
static void sqlite3VdbeMemSetInt64(Mem *pMem, i64 val){
  sqlite3VdbeMemRelease(pMem);
  pMem->u.i = val;
  pMem->flags = MEM_Int;
  pMem->type = SQLITE_INTEGER;
}

/*
** Delete any previous value and set the value stored in *pMem to val,
** manifest type REAL.
*/
static void sqlite3VdbeMemSetDouble(Mem *pMem, double val){
  if( isnan(val) ){
    sqlite3VdbeMemSetNull(pMem);
  }else{
    sqlite3VdbeMemRelease(pMem);
    pMem->r = val;
    pMem->flags = MEM_Real;
    pMem->type = SQLITE_FLOAT;
  }
}

/*
** Return true if the Mem object contains a TEXT or BLOB that is
** too large - whose size exceeds SQLITE_MAX_LENGTH.
*/
static int sqlite3VdbeMemTooBig(Mem *p){
  if( p->flags & (MEM_Str|MEM_Blob) ){
    int n = p->n;
    if( p->flags & MEM_Zero ){
      n += p->u.i;
    }
    return n>SQLITE_MAX_LENGTH;
  }
................................................................................

/*
** Make an shallow copy of pFrom into pTo.  Prior contents of
** pTo are overwritten.  The pFrom->z field is not duplicated.  If
** pFrom->z is used, then pTo->z points to the same thing as pFrom->z
** and flags gets srcType (either MEM_Ephem or MEM_Static).
*/
static void sqlite3VdbeMemShallowCopy(Mem *pTo, const Mem *pFrom, int srcType){
  memcpy(pTo, pFrom, sizeof(*pFrom)-sizeof(pFrom->zShort));
  pTo->xDel = 0;
  if( pTo->flags & (MEM_Str|MEM_Blob) ){
    pTo->flags &= ~(MEM_Dyn|MEM_Static|MEM_Short|MEM_Ephem);
    assert( srcType==MEM_Ephem || srcType==MEM_Static );
    pTo->flags |= srcType;
  }
}

/*
** Make a full copy of pFrom into pTo.  Prior contents of pTo are
** freed before the copy is made.
*/
static int sqlite3VdbeMemCopy(Mem *pTo, const Mem *pFrom){
  int rc;
  if( pTo->flags & MEM_Dyn ){
    sqlite3VdbeMemRelease(pTo);
  }
  sqlite3VdbeMemShallowCopy(pTo, pFrom, MEM_Ephem);
  if( pTo->flags & MEM_Ephem ){
    rc = sqlite3VdbeMemMakeWriteable(pTo);
................................................................................
** Transfer the contents of pFrom to pTo. Any existing value in pTo is
** freed. If pFrom contains ephemeral data, a copy is made.
**
** pFrom contains an SQL NULL when this routine returns.  SQLITE_NOMEM
** might be returned if pFrom held ephemeral data and we were unable
** to allocate enough space to make a copy.
*/
static int sqlite3VdbeMemMove(Mem *pTo, Mem *pFrom){
  int rc;
  if( pTo->flags & MEM_Dyn ){
    sqlite3VdbeMemRelease(pTo);
  }
  memcpy(pTo, pFrom, sizeof(Mem));
  if( pFrom->flags & MEM_Short ){
    pTo->z = pTo->zShort;
................................................................................
  }
  return rc;
}

/*
** Change the value of a Mem to be a string or a BLOB.
*/
static int sqlite3VdbeMemSetStr(
  Mem *pMem,          /* Memory cell to set to string value */
  const char *z,      /* String pointer */
  int n,              /* Bytes in string, or negative */
  u8 enc,             /* Encoding of z.  0 for BLOBs */
  void (*xDel)(void*) /* Destructor function */
){
  sqlite3VdbeMemRelease(pMem);
................................................................................
** negative, zero or positive if pMem1 is less than, equal to, or greater
** than pMem2. Sorting order is NULL's first, followed by numbers (integers
** and reals) sorted numerically, followed by text ordered by the collating
** sequence pColl and finally blob's ordered by memcmp().
**
** Two NULL values are considered equal by this function.
*/
static int sqlite3MemCompare(const Mem *pMem1, const Mem *pMem2, const CollSeq *pColl){
  int rc;
  int f1, f2;
  int combined_flags;

  /* Interchange pMem1 and pMem2 if the collating sequence specifies
  ** DESC order.
  */
................................................................................
**
** The pMem structure is assumed to be uninitialized.  Any prior content
** is overwritten without being freed.
**
** If this routine fails for any reason (malloc returns NULL or unable
** to read from the disk) then the pMem is left in an inconsistent state.
*/
static int sqlite3VdbeMemFromBtree(
  BtCursor *pCur,   /* Cursor pointing at record to retrieve. */
  int offset,       /* Offset from the start of data to return bytes from. */
  int amt,          /* Number of bytes to return. */
  int key,          /* If true, retrieve from the btree key, not data. */
  Mem *pMem         /* OUT: Return data in this Mem structure. */
){
  char *zData;       /* Data from the btree layer */
................................................................................
}

#ifndef NDEBUG
/*
** Perform various checks on the memory cell pMem. An assert() will
** fail if pMem is internally inconsistent.
*/
static void sqlite3VdbeMemSanity(Mem *pMem){
  int flags = pMem->flags;
  assert( flags!=0 );  /* Must define some type */
  if( flags & (MEM_Str|MEM_Blob) ){
    int x = flags & (MEM_Static|MEM_Dyn|MEM_Ephem|MEM_Short);
    assert( x!=0 );            /* Strings must define a string subtype */
    assert( (x & (x-1))==0 );  /* Only one string subtype can be defined */
    assert( pMem->z!=0 );      /* Strings must have a value */
................................................................................
** parameter, which must be one of SQLITE_UTF16BE, SQLITE_UTF16LE or
** SQLITE_UTF8.
**
** (2006-02-16:)  The enc value can be or-ed with SQLITE_UTF16_ALIGNED.
** If that is the case, then the result must be aligned on an even byte
** boundary.
*/
static const void *sqlite3ValueText(sqlite3_value* pVal, u8 enc){
  if( !pVal ) return 0;
  assert( (enc&3)==(enc&~SQLITE_UTF16_ALIGNED) );

  if( pVal->flags&MEM_Null ){
    return 0;
  }
  assert( (MEM_Blob>>3) == MEM_Str );
................................................................................
    return 0;
  }
}

/*
** Create a new sqlite3_value object.
*/
static sqlite3_value *sqlite3ValueNew(void){
  Mem *p = sqliteMalloc(sizeof(*p));
  if( p ){
    p->flags = MEM_Null;
    p->type = SQLITE_NULL;
  }
  return p;
}
................................................................................
** This only works for very simple expressions that consist of one constant
** token (i.e. "5", "5.1", "NULL", "'a string'"). If the expression can
** be converted directly into a value, then the value is allocated and
** a pointer written to *ppVal. The caller is responsible for deallocating
** the value by passing it to sqlite3ValueFree() later on. If the expression
** cannot be converted to a value, then *ppVal is set to NULL.
*/
static int sqlite3ValueFromExpr(
  Expr *pExpr, 
  u8 enc, 
  u8 affinity,
  sqlite3_value **ppVal
){
  int op;
  char *zVal = 0;
................................................................................
  *ppVal = 0;
  return SQLITE_NOMEM;
}

/*
** Change the string value of an sqlite3_value object
*/
static void sqlite3ValueSetStr(
  sqlite3_value *v, 
  int n, 
  const void *z, 
  u8 enc,
  void (*xDel)(void*)
){
  if( v ) sqlite3VdbeMemSetStr((Mem *)v, z, n, enc, xDel);
}

/*
** Free an sqlite3_value object
*/
static void sqlite3ValueFree(sqlite3_value *v){
  if( !v ) return;
  sqlite3ValueSetStr(v, 0, 0, SQLITE_UTF8, SQLITE_STATIC);
  sqliteFree(v);
}

/*
** Return the number of bytes in the sqlite3_value object assuming
** that it uses the encoding "enc"
*/
static int sqlite3ValueBytes(sqlite3_value *pVal, u8 enc){
  Mem *p = (Mem*)pVal;
  if( (p->flags & MEM_Blob)!=0 || sqlite3ValueText(pVal, enc) ){
    if( p->flags & MEM_Zero ){
      return p->n+p->u.i;
    }else{
      return p->n;
    }
................................................................................
int sqlite3_vdbe_addop_trace = 0;
#endif


/*
** Create a new virtual database engine.
*/
static Vdbe *sqlite3VdbeCreate(sqlite3 *db){
  Vdbe *p;
  p = sqliteMalloc( sizeof(Vdbe) );
  if( p==0 ) return 0;
  p->db = db;
  if( db->pVdbe ){
    db->pVdbe->pPrev = p;
  }
................................................................................
  p->magic = VDBE_MAGIC_INIT;
  return p;
}

/*
** Remember the SQL string for a prepared statement.
*/
static void sqlite3VdbeSetSql(Vdbe *p, const char *z, int n){
  if( p==0 ) return;
  assert( p->zSql==0 );
  p->zSql = sqlite3StrNDup(z, n);
}

/*
** Return the SQL associated with a prepared statement
*/
static const char *sqlite3VdbeGetSql(Vdbe *p){
  return p->zSql;
}

/*
** Swap all content between two VDBE structures.
*/
static void sqlite3VdbeSwap(Vdbe *pA, Vdbe *pB){
  Vdbe tmp, *pTmp;
  char *zTmp;
  int nTmp;
  tmp = *pA;
  *pA = *pB;
  *pB = tmp;
  pTmp = pA->pNext;
................................................................................
  pB->nSql = nTmp;
}

#ifdef SQLITE_DEBUG
/*
** Turn tracing on or off
*/
static void sqlite3VdbeTrace(Vdbe *p, FILE *trace){
  p->trace = trace;
}
#endif

/*
** Resize the Vdbe.aOp array so that it contains at least N
** elements. If the Vdbe is in VDBE_MAGIC_RUN state, then
................................................................................
**
**    p1, p2          First two of the three possible operands.
**
** Use the sqlite3VdbeResolveLabel() function to fix an address and
** the sqlite3VdbeChangeP3() function to change the value of the P3
** operand.
*/
static int sqlite3VdbeAddOp(Vdbe *p, int op, int p1, int p2){
  int i;
  VdbeOp *pOp;

  i = p->nOp;
  assert( p->magic==VDBE_MAGIC_INIT );
  if( p->nOpAlloc<=i ){
    resizeOpArray(p, i+1);
................................................................................
#endif
  return i;
}

/*
** Add an opcode that includes the p3 value.
*/
static int sqlite3VdbeOp3(Vdbe *p, int op, int p1, int p2, const char *zP3,int p3type){
  int addr = sqlite3VdbeAddOp(p, op, p1, p2);
  sqlite3VdbeChangeP3(p, addr, zP3, p3type);
  return addr;
}

/*
** Create a new symbolic label for an instruction that has yet to be
................................................................................
**
** The VDBE knows that a P2 value is a label because labels are
** always negative and P2 values are suppose to be non-negative.
** Hence, a negative P2 value is a label that has yet to be resolved.
**
** Zero is returned if a malloc() fails.
*/
static int sqlite3VdbeMakeLabel(Vdbe *p){
  int i;
  i = p->nLabel++;
  assert( p->magic==VDBE_MAGIC_INIT );
  if( i>=p->nLabelAlloc ){
    p->nLabelAlloc = p->nLabelAlloc*2 + 10;
    p->aLabel = sqliteReallocOrFree(p->aLabel,
                                    p->nLabelAlloc*sizeof(p->aLabel[0]));
................................................................................
}

/*
** Resolve label "x" to be the address of the next instruction to
** be inserted.  The parameter "x" must have been obtained from
** a prior call to sqlite3VdbeMakeLabel().
*/
static void sqlite3VdbeResolveLabel(Vdbe *p, int x){
  int j = -1-x;
  assert( p->magic==VDBE_MAGIC_INIT );
  assert( j>=0 && j<p->nLabel );
  if( p->aLabel ){
    p->aLabel[j] = p->nOp;
  }
}
................................................................................
    NOPUSH_MASK_8 + (((unsigned)NOPUSH_MASK_9)<<16)
  };
  assert( op<32*5 );
  return (masks[op>>5] & (1<<(op&0x1F)));
}

#ifndef NDEBUG
static int sqlite3VdbeOpcodeNoPush(u8 op){
  return opcodeNoPush(op);
}
#endif

/*
** Loop through the program looking for P2 values that are negative.
** Each such value is a label.  Resolve the label by setting the P2
................................................................................

    if( opcode==OP_Function || opcode==OP_AggStep 
#ifndef SQLITE_OMIT_VIRTUALTABLE
        || opcode==OP_VUpdate
#endif
    ){
      if( pOp->p2>nMaxArgs ) nMaxArgs = pOp->p2;

    }else if( opcode==OP_Halt ){
      if( pOp->p1==SQLITE_CONSTRAINT && pOp->p2==OE_Abort ){
        doesStatementRollback = 1;
      }
    }else if( opcode==OP_Statement ){
      hasStatementBegin = 1;



    }else if( opcode==OP_VFilter ){
      int n;
      assert( p->nOp - i >= 3 );
      assert( pOp[-2].opcode==OP_Integer );
      n = pOp[-2].p1;
      if( n>nMaxArgs ) nMaxArgs = n;

    }
    if( opcodeNoPush(opcode) ){
      nMaxStack--;
    }

    if( pOp->p2>=0 ) continue;
    assert( -1-pOp->p2<p->nLabel );
................................................................................
    }
  }
}

/*
** Return the address of the next instruction to be inserted.
*/
static int sqlite3VdbeCurrentAddr(Vdbe *p){
  assert( p->magic==VDBE_MAGIC_INIT );
  return p->nOp;
}

/*
** Add a whole list of operations to the operation stack.  Return the
** address of the first operation added.
*/
static int sqlite3VdbeAddOpList(Vdbe *p, int nOp, VdbeOpList const *aOp){
  int addr;
  assert( p->magic==VDBE_MAGIC_INIT );
  resizeOpArray(p, p->nOp + nOp);
  if( sqlite3MallocFailed() ){
    return 0;
  }
  addr = p->nOp;
................................................................................

/*
** Change the value of the P1 operand for a specific instruction.
** This routine is useful when a large program is loaded from a
** static array using sqlite3VdbeAddOpList but we want to make a
** few minor changes to the program.
*/
static void sqlite3VdbeChangeP1(Vdbe *p, int addr, int val){
  assert( p==0 || p->magic==VDBE_MAGIC_INIT );
  if( p && addr>=0 && p->nOp>addr && p->aOp ){
    p->aOp[addr].p1 = val;
  }
}

/*
** Change the value of the P2 operand for a specific instruction.
** This routine is useful for setting a jump destination.
*/
static void sqlite3VdbeChangeP2(Vdbe *p, int addr, int val){
  assert( val>=0 );
  assert( p==0 || p->magic==VDBE_MAGIC_INIT );
  if( p && addr>=0 && p->nOp>addr && p->aOp ){
    p->aOp[addr].p2 = val;
  }
}

/*
** Change the P2 operand of instruction addr so that it points to
** the address of the next instruction to be coded.
*/
static void sqlite3VdbeJumpHere(Vdbe *p, int addr){
  sqlite3VdbeChangeP2(p, addr, p->nOp);
}


/*
** If the input FuncDef structure is ephemeral, then free it.  If
** the FuncDef is not ephermal, then do nothing.
................................................................................
  }
}


/*
** Change N opcodes starting at addr to No-ops.
*/
static void sqlite3VdbeChangeToNoop(Vdbe *p, int addr, int N){
  if( p && p->aOp ){
    VdbeOp *pOp = &p->aOp[addr];
    while( N-- ){
      freeP3(pOp->p3type, pOp->p3);
      memset(pOp, 0, sizeof(pOp[0]));
      pOp->opcode = OP_Noop;
      pOp++;
................................................................................
** 
** Other values of n (P3_STATIC, P3_COLLSEQ etc.) indicate that zP3 points
** to a string or structure that is guaranteed to exist for the lifetime of
** the Vdbe. In these cases we can just copy the pointer.
**
** If addr<0 then change P3 on the most recently inserted instruction.
*/
static void sqlite3VdbeChangeP3(Vdbe *p, int addr, const char *zP3, int n){
  Op *pOp;
  assert( p==0 || p->magic==VDBE_MAGIC_INIT );
  if( p==0 || p->aOp==0 || sqlite3MallocFailed() ){
    if (n != P3_KEYINFO) {
      freeP3(n, (void*)*(char**)&zP3);
    }
    return;
................................................................................
}

#ifndef NDEBUG
/*
** Replace the P3 field of the most recently coded instruction with
** comment text.
*/
static void sqlite3VdbeComment(Vdbe *p, const char *zFormat, ...){
  va_list ap;
  assert( p->nOp>0 || p->aOp==0 );
  assert( p->aOp==0 || p->aOp[p->nOp-1].p3==0 || sqlite3MallocFailed() );
  va_start(ap, zFormat);
  sqlite3VdbeChangeP3(p, -1, sqlite3VMPrintf(zFormat, ap), P3_DYNAMIC);
  va_end(ap);
}
#endif

/*
** Return the opcode for a given address.
*/
static VdbeOp *sqlite3VdbeGetOp(Vdbe *p, int addr){
  assert( p->magic==VDBE_MAGIC_INIT );
  assert( (addr>=0 && addr<p->nOp) || sqlite3MallocFailed() );
  return ((addr>=0 && addr<p->nOp)?(&p->aOp[addr]):0);
}

#if !defined(SQLITE_OMIT_EXPLAIN) || !defined(NDEBUG) \
     || defined(VDBE_PROFILE) || defined(SQLITE_DEBUG)
................................................................................
#endif


#if defined(VDBE_PROFILE) || defined(SQLITE_DEBUG)
/*
** Print a single opcode.  This routine is used for debugging only.
*/
static void sqlite3VdbePrintOp(FILE *pOut, int pc, Op *pOp){
  char *zP3;
  char zPtr[50];
  static const char *zFormat1 = "%4d %-13s %4d %4d %s\n";
  if( pOut==0 ) pOut = stdout;
  zP3 = displayP3(pOp, zPtr, sizeof(zPtr));
  fprintf(pOut, zFormat1,
      pc, sqlite3OpcodeNames[pOp->opcode], pOp->p1, pOp->p2, zP3);
................................................................................
/*
** Give a listing of the program in the virtual machine.
**
** The interface is the same as sqlite3VdbeExec().  But instead of
** running the code, it invokes the callback once for each instruction.
** This feature is used to implement "EXPLAIN".
*/
static int sqlite3VdbeList(
  Vdbe *p                   /* The VDBE */
){
  sqlite3 *db = p->db;
  int i;
  int rc = SQLITE_OK;

  assert( p->explain );
................................................................................
}
#endif /* SQLITE_OMIT_EXPLAIN */

#ifdef SQLITE_DEBUG
/*
** Print the SQL that was used to generate a VDBE program.
*/
static void sqlite3VdbePrintSql(Vdbe *p){
  int nOp = p->nOp;
  VdbeOp *pOp;
  if( nOp<1 ) return;
  pOp = &p->aOp[nOp-1];
  if( pOp->opcode==OP_Noop && pOp->p3!=0 ){
    const char *z = pOp->p3;
    while( isspace(*(u8*)z) ) z++;
................................................................................
}
#endif

#if !defined(SQLITE_OMIT_TRACE) && defined(SQLITE_ENABLE_IOTRACE)
/*
** Print an IOTRACE message showing SQL content.
*/
static void sqlite3VdbeIOTraceSql(Vdbe *p){
  int nOp = p->nOp;
  VdbeOp *pOp;
  if( sqlite3_io_trace==0 ) return;
  if( nOp<1 ) return;
  pOp = &p->aOp[nOp-1];
  if( pOp->opcode==OP_Noop && pOp->p3!=0 ){
    char *z = sqlite3StrDup(pOp->p3);
................................................................................
** as allocating stack space and initializing the program counter.
** After the VDBE has be prepped, it can be executed by one or more
** calls to sqlite3VdbeExec().  
**
** This is the only way to move a VDBE from VDBE_MAGIC_INIT to
** VDBE_MAGIC_RUN.
*/
static void sqlite3VdbeMakeReady(
  Vdbe *p,                       /* The VDBE */
  int nVar,                      /* Number of '?' see in the SQL statement */
  int nMem,                      /* Number of memory cells to allocate */
  int nCursor,                   /* Number of cursors to allocate */
  int isExplain                  /* True if the EXPLAIN keywords is present */
){
  int n;
................................................................................
  p->errorAction = OE_Abort;
  p->popStack =  0;
  p->explain |= isExplain;
  p->magic = VDBE_MAGIC_RUN;
  p->nChange = 0;
  p->cacheCtr = 1;
  p->minWriteFileFormat = 255;

#ifdef VDBE_PROFILE
  {
    int i;
    for(i=0; i<p->nOp; i++){
      p->aOp[i].cnt = 0;
      p->aOp[i].cycles = 0;
    }
................................................................................
#endif
}

/*
** Close a cursor and release all the resources that cursor happens
** to hold.
*/
static void sqlite3VdbeFreeCursor(Vdbe *p, Cursor *pCx){
  if( pCx==0 ){
    return;
  }
  if( pCx->pCursor ){
    sqlite3BtreeCloseCursor(pCx->pCursor);
  }
  if( pCx->pBt ){
................................................................................
    sqliteFree(p->contextStack);
  }
  p->contextStack = 0;
  p->contextStackDepth = 0;
  p->contextStackTop = 0;
  sqliteFree(p->zErrMsg);
  p->zErrMsg = 0;

}

/*
** Set the number of result columns that will be returned by this SQL
** statement. This is now set at compile time, rather than during
** execution of the vdbe program so that sqlite3_column_count() can
** be called on an SQL statement before sqlite3_step().
*/
static void sqlite3VdbeSetNumCols(Vdbe *p, int nResColumn){
  Mem *pColName;
  int n;
  releaseMemArray(p->aColName, p->nResColumn*COLNAME_N);
  sqliteFree(p->aColName);
  n = nResColumn*COLNAME_N;
  p->nResColumn = nResColumn;
  p->aColName = pColName = (Mem*)sqliteMalloc( sizeof(Mem)*n );
................................................................................
** This call must be made after a call to sqlite3VdbeSetNumCols().
**
** If N==P3_STATIC  it means that zName is a pointer to a constant static
** string and we can just copy the pointer. If it is P3_DYNAMIC, then 
** the string is freed using sqliteFree() when the vdbe is finished with
** it. Otherwise, N bytes of zName are copied.
*/
static int sqlite3VdbeSetColName(Vdbe *p, int idx, int var, const char *zName, int N){
  int rc;
  Mem *pColName;
  assert( idx<p->nResColumn );
  assert( var<COLNAME_N );
  if( sqlite3MallocFailed() ) return SQLITE_NOMEM;
  assert( p->aColName!=0 );
  pColName = &(p->aColName[idx+var*p->nResColumn]);
................................................................................
/*
** Find every active VM other than pVdbe and change its status to
** aborted.  This happens when one VM causes a rollback due to an
** ON CONFLICT ROLLBACK clause (for example).  The other VMs must be
** aborted so that they do not have data rolled out from underneath
** them leading to a segfault.
*/
static void sqlite3AbortOtherActiveVdbes(sqlite3 *db, Vdbe *pExcept){
  Vdbe *pOther;
  for(pOther=db->pVdbe; pOther; pOther=pOther->pNext){
    if( pOther==pExcept ) continue;
    if( pOther->magic!=VDBE_MAGIC_RUN || pOther->pc<0 ) continue;
    checkActiveVdbeCnt(db);
    closeAllCursors(pOther);
    checkActiveVdbeCnt(db);
................................................................................
** This routine is the only way to move the state of a VM from
** SQLITE_MAGIC_RUN to SQLITE_MAGIC_HALT.
**
** Return an error code.  If the commit could not complete because of
** lock contention, return SQLITE_BUSY.  If SQLITE_BUSY is returned, it
** means the close did not happen and needs to be repeated.
*/
static int sqlite3VdbeHalt(Vdbe *p){
  sqlite3 *db = p->db;
  int i;
  int (*xFunc)(Btree *pBt) = 0;  /* Function to call on each btree backend */
  int isSpecialError;            /* Set to true if SQLITE_NOMEM or IOERR */

  /* This function contains the logic that determines if a statement or
  ** transaction will be committed or rolled back as a result of the
................................................................................
          sqlite3CommitInternalChanges(db);
        }
      }else{
        sqlite3RollbackAll(db);
      }
    }else if( !xFunc ){
      if( p->rc==SQLITE_OK || p->errorAction==OE_Fail ){

        xFunc = sqlite3BtreeCommitStmt;

      }else if( p->errorAction==OE_Abort ){
        xFunc = sqlite3BtreeRollbackStmt;
      }else{
        sqlite3AbortOtherActiveVdbes(db, p);
        sqlite3RollbackAll(db);
        db->autoCommit = 1;
      }
................................................................................
  return SQLITE_OK;
}

/*
** Each VDBE holds the result of the most recent sqlite3_step() call
** in p->rc.  This routine sets that result back to SQLITE_OK.
*/
static void sqlite3VdbeResetStepResult(Vdbe *p){
  p->rc = SQLITE_OK;
}

/*
** Clean up a VDBE after execution but do not delete the VDBE just yet.
** Write any error messages into *pzErrMsg.  Return the result code.
**
................................................................................
** After this routine is run, the VDBE should be ready to be executed
** again.
**
** To look at it another way, this routine resets the state of the
** virtual machine from VDBE_MAGIC_RUN or VDBE_MAGIC_HALT back to
** VDBE_MAGIC_INIT.
*/
static int sqlite3VdbeReset(Vdbe *p){
  sqlite3 *db;
  db = p->db;

  /* If the VM did not run to completion or if it encountered an
  ** error, then it might not have been halted properly.  So halt
  ** it now.
  */
................................................................................
  return p->rc & db->errMask;
}
 
/*
** Clean up and delete a VDBE after execution.  Return an integer which is
** the result code.  Write any error message text into *pzErrMsg.
*/
static int sqlite3VdbeFinalize(Vdbe *p){
  int rc = SQLITE_OK;
  if( p->magic==VDBE_MAGIC_RUN || p->magic==VDBE_MAGIC_HALT ){
    rc = sqlite3VdbeReset(p);
    assert( (rc & p->db->errMask)==rc );
  }else if( p->magic!=VDBE_MAGIC_INIT ){
    return SQLITE_MISUSE;
  }
................................................................................

/*
** Call the destructor for each auxdata entry in pVdbeFunc for which
** the corresponding bit in mask is clear.  Auxdata entries beyond 31
** are always destroyed.  To destroy all auxdata entries, call this
** routine with mask==0.
*/
static void sqlite3VdbeDeleteAuxData(VdbeFunc *pVdbeFunc, int mask){
  int i;
  for(i=0; i<pVdbeFunc->nAux; i++){
    struct AuxData *pAux = &pVdbeFunc->apAux[i];
    if( (i>31 || !(mask&(1<<i))) && pAux->pAux ){
      if( pAux->xDelete ){
        pAux->xDelete(pAux->pAux);
      }
................................................................................
    }
  }
}

/*
** Delete an entire VDBE.
*/
static void sqlite3VdbeDelete(Vdbe *p){
  int i;
  if( p==0 ) return;
  Cleanup(p);
  if( p->pPrev ){
    p->pPrev->pNext = p->pNext;
  }else{
    assert( p->db->pVdbe==p );
................................................................................
}

/*
** If a MoveTo operation is pending on the given cursor, then do that
** MoveTo now.  Return an error code.  If no MoveTo is pending, this
** routine does nothing and returns SQLITE_OK.
*/
static int sqlite3VdbeCursorMoveto(Cursor *p){
  if( p->deferredMoveto ){
    int res, rc;
#ifdef SQLITE_TEST
    extern int sqlite3_search_count;
#endif
    assert( p->isTable );
    rc = sqlite3BtreeMoveto(p->pCursor, 0, p->movetoTarget, 0, &res);
................................................................................
** The 8 and 9 types were added in 3.3.0, file format 4.  Prior versions
** of SQLite will not understand those serial types.
*/

/*
** Return the serial-type for the value stored in pMem.
*/
static u32 sqlite3VdbeSerialType(Mem *pMem, int file_format){
  int flags = pMem->flags;
  int n;

  if( flags&MEM_Null ){
    return 0;
  }
  if( flags&MEM_Int ){
................................................................................
  assert( n>=0 );
  return ((n*2) + 12 + ((flags&MEM_Str)!=0));
}

/*
** Return the length of the data corresponding to the supplied serial-type.
*/
static int sqlite3VdbeSerialTypeLen(u32 serial_type){
  if( serial_type>=12 ){
    return (serial_type-12)/2;
  }else{
    static const u8 aSize[] = { 0, 1, 2, 3, 4, 6, 8, 8, 0, 0, 0, 0 };
    return aSize[serial_type];
  }
}
................................................................................
** prefix and the tail then write the prefix and set the tail to all
** zeros.
**
** Return the number of bytes actually written into buf[].  The number
** of bytes in the zero-filled tail is included in the return value only
** if those bytes were zeroed in buf[].
*/ 
static int sqlite3VdbeSerialPut(u8 *buf, int nBuf, Mem *pMem, int file_format){
  u32 serial_type = sqlite3VdbeSerialType(pMem, file_format);
  int len;

  /* Integer and Real */
  if( serial_type<=7 && serial_type>0 ){
    u64 v;
    int i;
................................................................................
  return 0;
}

/*
** Deserialize the data blob pointed to by buf as serial type serial_type
** and store the result in pMem.  Return the number of bytes read.
*/ 
static int sqlite3VdbeSerialGet(
  const unsigned char *buf,     /* Buffer to deserialize from */
  u32 serial_type,              /* Serial type to deserialize */
  Mem *pMem                     /* Memory cell to write value into */
){
  switch( serial_type ){
    case 10:   /* Reserved for future use */
    case 11:   /* Reserved for future use */
................................................................................
/*
** This function compares the two table rows or index records specified by 
** {nKey1, pKey1} and {nKey2, pKey2}, returning a negative, zero
** or positive integer if {nKey1, pKey1} is less than, equal to or 
** greater than {nKey2, pKey2}.  Both Key1 and Key2 must be byte strings
** composed by the OP_MakeRecord opcode of the VDBE.
*/
static int sqlite3VdbeRecordCompare(
  void *userData,
  int nKey1, const void *pKey1, 
  int nKey2, const void *pKey2
){
  KeyInfo *pKeyInfo = (KeyInfo*)userData;
  u32 d1, d2;          /* Offset into aKey[] of next data element */
  u32 idx1, idx2;      /* Offset into aKey[] of next header element */
................................................................................

/*
** The argument is an index entry composed using the OP_MakeRecord opcode.
** The last entry in this record should be an integer (specifically
** an integer rowid).  This routine returns the number of bytes in
** that integer.
*/
static int sqlite3VdbeIdxRowidLen(const u8 *aKey){
  u32 szHdr;        /* Size of the header */
  u32 typeRowid;    /* Serial type of the rowid */

  sqlite3GetVarint32(aKey, &szHdr);
  sqlite3GetVarint32(&aKey[szHdr-1], &typeRowid);
  return sqlite3VdbeSerialTypeLen(typeRowid);
}
................................................................................
  

/*
** pCur points at an index entry created using the OP_MakeRecord opcode.
** Read the rowid (the last field in the record) and store it in *rowid.
** Return SQLITE_OK if everything works, or an error code otherwise.
*/
static int sqlite3VdbeIdxRowid(BtCursor *pCur, i64 *rowid){
  i64 nCellKey = 0;
  int rc;
  u32 szHdr;        /* Size of the header */
  u32 typeRowid;    /* Serial type of the rowid */
  u32 lenRowid;     /* Size of the rowid */
  Mem m, v;

................................................................................
** that is negative, zero, or positive if pC is less than, equal to,
** or greater than pKey.  Return SQLITE_OK on success.
**
** pKey is either created without a rowid or is truncated so that it
** omits the rowid at the end.  The rowid at the end of the index entry
** is ignored as well.
*/
static int sqlite3VdbeIdxKeyCompare(
  Cursor *pC,                 /* The cursor to compare against */
  int nKey, const u8 *pKey,   /* The key to compare */
  int *res                    /* Write the comparison result here */
){
  i64 nCellKey = 0;
  int rc;
  BtCursor *pCur = pC->pCursor;
................................................................................
  return SQLITE_OK;
}

/*
** This routine sets the value to be returned by subsequent calls to
** sqlite3_changes() on the database handle 'db'. 
*/
static void sqlite3VdbeSetChanges(sqlite3 *db, int nChange){
  db->nChange = nChange;
  db->nTotalChange += nChange;
}

/*
** Set a flag in the vdbe to update the change counter when it is finalised
** or reset.
*/
static void sqlite3VdbeCountChanges(Vdbe *v){
  v->changeCntOn = 1;
}

/*
** Mark every prepared statement associated with a database connection
** as expired.
**
** An expired statement means that recompilation of the statement is
** recommend.  Statements expire when things happen that make their
** programs obsolete.  Removing user-defined functions or collating
** sequences, or changing an authorization function are the types of
** things that make prepared statements obsolete.
*/
static void sqlite3ExpirePreparedStatements(sqlite3 *db){
  Vdbe *p;
  for(p = db->pVdbe; p; p=p->pNext){
    p->expired = 1;
  }
}

/*
** Return the database associated with the Vdbe.
*/
static sqlite3 *sqlite3VdbeDb(Vdbe *v){
  return v->db;
}

/************** End of vdbeaux.c *********************************************/
/************** Begin file vdbeapi.c *****************************************/
/*
** 2004 May 26
................................................................................
** Return TRUE (non-zero) of the statement supplied as an argument needs
** to be recompiled.  A statement needs to be recompiled whenever the
** execution environment changes in a way that would alter the program
** that sqlite3_prepare() generates.  For example, if new functions or
** collating sequences are registered or if an authorizer function is
** added or changed.
*/
int sqlite3_expired(sqlite3_stmt *pStmt){
  Vdbe *p = (Vdbe*)pStmt;
  return p==0 || p->expired;
}

/**************************** sqlite3_value_  *******************************
** The following routines extract information from a Mem or sqlite3_value
** structure.
................................................................................
  sqlite3Error(p->db, rc, 0);
  p->rc = sqlite3ApiExit(p->db, p->rc);
end_of_step:
  assert( (rc&0xff)==rc );
  if( p->zSql && (rc&0xff)<SQLITE_ROW ){
    /* This behavior occurs if sqlite3_prepare_v2() was used to build
    ** the prepared statement.  Return error codes directly */

    return p->rc;
  }else{
    /* This is for legacy sqlite3_prepare() builds and when the code
    ** is SQLITE_ROW or SQLITE_DONE */
    return rc;
  }
}
................................................................................

/*
** This is the top-level implementation of sqlite3_step().  Call
** sqlite3Step() to do most of the work.  If a schema error occurs,
** call sqlite3Reprepare() and try again.
*/
#ifdef SQLITE_OMIT_PARSER
int sqlite3_step(sqlite3_stmt *pStmt){
  return sqlite3Step((Vdbe*)pStmt);
}
#else
int sqlite3_step(sqlite3_stmt *pStmt){
  int cnt = 0;
  int rc;
  Vdbe *v = (Vdbe*)pStmt;
  while( (rc = sqlite3Step(v))==SQLITE_SCHEMA
         && cnt++ < 5
         && sqlite3Reprepare(v) ){
    sqlite3_reset(pStmt);
................................................................................
** The following is the implementation of an SQL function that always
** fails with an error message stating that the function is used in the
** wrong context.  The sqlite3_overload_function() API might construct
** SQL function that use this routine so that the functions will exist
** for name resolution but are actually overloaded by the xFindFunction
** method of virtual tables.
*/
static void sqlite3InvalidFunction(
  sqlite3_context *context,  /* The function calling context */
  int argc,                  /* Number of arguments to the function */
  sqlite3_value **argv       /* Value of each argument */
){
  const char *zName = context->pFunc->zName;
  char *zErr;
  zErr = sqlite3MPrintf(
................................................................................
** it is, return a pointer to the Mem for the value of that column.
** If iCol is not valid, return a pointer to a Mem which has a value
** of NULL.
*/
static Mem *columnMem(sqlite3_stmt *pStmt, int i){
  Vdbe *pVm = (Vdbe *)pStmt;
  int vals = sqlite3_data_count(pStmt);
  if( i>=vals || i<0 ){
    static const Mem nullMem = {{0}, 0.0, "", 0, MEM_Null, SQLITE_NULL };
    sqlite3Error(pVm->db, SQLITE_RANGE, 0);
    return (Mem*)&nullMem;
  }
  return &pVm->pTos[(1-vals)+i];
}

................................................................................
**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** The following global variable is incremented every time a cursor
** moves, either by the OP_MoveXX, OP_Next, or OP_Prev opcodes.  The test
** procedures use this information to make sure that indices are
** working correctly.  This variable has no function other than to
................................................................................
  return pMem->type;
}

/*
** Exported version of applyAffinity(). This one works on sqlite3_value*, 
** not the internal Mem* type.
*/
static void sqlite3ValueApplyAffinity(sqlite3_value *pVal, u8 affinity, u8 enc){
  applyAffinity((Mem *)pVal, affinity, enc);
}

#ifdef SQLITE_DEBUG
/*
** Write a nice string representation of the contents of cell pMem
** into buffer zBuf, length nBuf.
*/
static void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf){
  char *zCsr = zBuf;
  int f = pMem->flags;

  static const char *const encnames[] = {"(X)", "(8)", "(16LE)", "(16BE)"};

  if( f&MEM_Blob ){
    int i;
................................................................................
** routine to return SQLITE_ERROR.
**
** Other fatal errors return SQLITE_ERROR.
**
** After this routine has finished, sqlite3VdbeFinalize() should be
** used to clean up the mess that was left behind.
*/
static int sqlite3VdbeExec(
  Vdbe *p                    /* The VDBE */
){
  int pc;                    /* The program counter */
  Op *pOp;                   /* Current operation */
  int rc = SQLITE_OK;        /* Value to return */
  sqlite3 *db = p->db;       /* The database */
  u8 encoding = ENC(db);     /* The database encoding */
................................................................................
    b = pNos->u.i;
    switch( pOp->opcode ){
      case OP_Add:         b += a;       break;
      case OP_Subtract:    b -= a;       break;
      case OP_Multiply:    b *= a;       break;
      case OP_Divide: {
        if( a==0 ) goto divide_by_zero;








        b /= a;
        break;
      }
      default: {
        if( a==0 ) goto divide_by_zero;

        b %= a;
        break;
      }
    }
    Release(pTos);
    pTos--;
    Release(pTos);
................................................................................
        b /= a;
        break;
      }
      default: {
        i64 ia = (i64)a;
        i64 ib = (i64)b;
        if( ia==0 ) goto divide_by_zero;

        b = ib % ia;
        break;
      }
    }
    if( isnan(b) ){
      goto divide_by_zero;
    }
    Release(pTos);
    pTos--;
    Release(pTos);
    pTos->r = b;
    pTos->flags = MEM_Real;
................................................................................
case OP_Statement: {       /* no-push */
  int i = pOp->p1;
  Btree *pBt;
  if( i>=0 && i<db->nDb && (pBt = db->aDb[i].pBt)!=0 && !(db->autoCommit) ){
    assert( sqlite3BtreeIsInTrans(pBt) );
    if( !sqlite3BtreeIsInStmt(pBt) ){
      rc = sqlite3BtreeBeginStmt(pBt);

    }
  }
  break;
}

/* Opcode: AutoCommit P1 P2 *
**
................................................................................
**
** Read cookie number P2 from database P1 and push it onto the stack.
** P2==0 is the schema version.  P2==1 is the database format.
** P2==2 is the recommended pager cache size, and so forth.  P1==0 is
** the main database file and P1==1 is the database file used to store
** temporary tables.
**





** There must be a read-lock on the database (either a transaction
** must be started or there must be an open cursor) before
** executing this instruction.
*/
case OP_ReadCookie: {
  int iMeta;



  assert( pOp->p2<SQLITE_N_BTREE_META );
  assert( pOp->p1>=0 && pOp->p1<db->nDb );





  assert( db->aDb[pOp->p1].pBt!=0 );
  /* The indexing of meta values at the schema layer is off by one from
  ** the indexing in the btree layer.  The btree considers meta[0] to
  ** be the number of free pages in the database (a read-only value)
  ** and meta[1] to be the schema cookie.  The schema layer considers
  ** meta[1] to be the schema cookie.  So we have to shift the index
  ** by one in the following statement.
  */
  rc = sqlite3BtreeGetMeta(db->aDb[pOp->p1].pBt, 1 + pOp->p2, (u32 *)&iMeta);
  pTos++;
  pTos->u.i = iMeta;
  pTos->flags = MEM_Int;
  break;
}

/* Opcode: SetCookie P1 P2 *
................................................................................
  aRoot = sqliteMallocRaw( sizeof(int*)*(nRoot+1) );
  if( aRoot==0 ) goto no_mem;
  j = pOp->p1;
  assert( j>=0 && j<p->nMem );
  pnErr = &p->aMem[j];
  assert( (pnErr->flags & MEM_Int)!=0 );
  for(j=0; j<nRoot; j++){
    Mem *pMem = &pTos[-j];
    aRoot[j] = pMem->u.i;
  }
  aRoot[j] = 0;
  popStack(&pTos, nRoot);
  pTos++;
  z = sqlite3BtreeIntegrityCheck(db->aDb[pOp->p2].pBt, aRoot, nRoot,
                                 pnErr->u.i, &nErr);
  pnErr->u.i -= nErr;
................................................................................
    }
  }

  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */


























#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VUpdate P1 P2 P3
**
** P3 is a pointer to a virtual table object, an sqlite3_vtab structure.
** This opcode invokes the corresponding xUpdate method. P2 values
** are taken from the stack to pass to the xUpdate invocation. The
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains code used to implement incremental BLOB I/O.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/


#ifndef SQLITE_OMIT_INCRBLOB

/*
** Valid sqlite3_blob* handles point to Incrblob structures.
................................................................................
  */
  db = v->db;
  rc = xCall(p->pCsr, iOffset+p->iOffset, n, z);
  if( rc==SQLITE_ABORT ){
    sqlite3VdbeFinalize(v);
    p->pStmt = 0;
  }else{

    v->rc = rc;
  }

  return sqlite3ApiExit(db, rc);
}

/*
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used for analyzing expressions and
** for generating VDBE code that evaluates expressions in SQLite.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** Return the 'affinity' of the expression pExpr if any.
**
** If pExpr is a column, a reference to a column via an 'AS' alias,
** or a sub-select with a column as the return value, then the 
................................................................................
** have an affinity:
**
** CREATE TABLE t1(a);
** SELECT * FROM t1 WHERE a;
** SELECT a AS b FROM t1 WHERE b;
** SELECT * FROM t1 WHERE (select a from t1);
*/
static char sqlite3ExprAffinity(Expr *pExpr){
  int op = pExpr->op;
  if( op==TK_SELECT ){
    return sqlite3ExprAffinity(pExpr->pSelect->pEList->a[0].pExpr);
  }
#ifndef SQLITE_OMIT_CAST
  if( op==TK_CAST ){
    return sqlite3AffinityType(&pExpr->token);
................................................................................
/*
** Set the collating sequence for expression pExpr to be the collating
** sequence named by pToken.   Return a pointer to the revised expression.
** The collating sequence is marked as "explicit" using the EP_ExpCollate
** flag.  An explicit collating sequence will override implicit
** collating sequences.
*/
static Expr *sqlite3ExprSetColl(Parse *pParse, Expr *pExpr, Token *pName){
  CollSeq *pColl;
  if( pExpr==0 ) return 0;
  pColl = sqlite3LocateCollSeq(pParse, (char*)pName->z, pName->n);
  if( pColl ){
    pExpr->pColl = pColl;
    pExpr->flags |= EP_ExpCollate;
  }
................................................................................
  return pExpr;
}

/*
** Return the default collation sequence for the expression pExpr. If
** there is no default collation type, return 0.
*/
static CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr){
  CollSeq *pColl = 0;
  if( pExpr ){

    pColl = pExpr->pColl;
    if( pExpr->op==TK_CAST && !pColl ){

      return sqlite3ExprCollSeq(pParse, pExpr->pLeft);
    }
  }
  if( sqlite3CheckCollSeq(pParse, pColl) ){ 
    pColl = 0;
  }
  return pColl;
................................................................................
}

/*
** pExpr is an operand of a comparison operator.  aff2 is the
** type affinity of the other operand.  This routine returns the
** type affinity that should be used for the comparison operator.
*/
static char sqlite3CompareAffinity(Expr *pExpr, char aff2){
  char aff1 = sqlite3ExprAffinity(pExpr);
  if( aff1 && aff2 ){
    /* Both sides of the comparison are columns. If one has numeric
    ** affinity, use that. Otherwise use no affinity.
    */
    if( sqlite3IsNumericAffinity(aff1) || sqlite3IsNumericAffinity(aff2) ){
      return SQLITE_AFF_NUMERIC;
................................................................................

/*
** pExpr is a comparison expression, eg. '=', '<', IN(...) etc.
** idx_affinity is the affinity of an indexed column. Return true
** if the index with affinity idx_affinity may be used to implement
** the comparison in pExpr.
*/
static int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity){
  char aff = comparisonAffinity(pExpr);
  switch( aff ){
    case SQLITE_AFF_NONE:
      return 1;
    case SQLITE_AFF_TEXT:
      return idx_affinity==SQLITE_AFF_TEXT;
    default:
................................................................................
}

/*
** Construct a new expression node and return a pointer to it.  Memory
** for this node is obtained from sqliteMalloc().  The calling function
** is responsible for making sure the node eventually gets freed.
*/
static Expr *sqlite3Expr(int op, Expr *pLeft, Expr *pRight, const Token *pToken){
  Expr *pNew;
  pNew = sqliteMalloc( sizeof(Expr) );
  if( pNew==0 ){
    /* When malloc fails, delete pLeft and pRight. Expressions passed to 
    ** this function must always be allocated with sqlite3Expr() for this 
    ** reason. 
    */
................................................................................
  return pNew;
}

/*
** Works like sqlite3Expr() but frees its pLeft and pRight arguments
** if it fails due to a malloc problem.
*/
static Expr *sqlite3ExprOrFree(int op, Expr *pLeft, Expr *pRight, const Token *pToken){
  Expr *pNew = sqlite3Expr(op, pLeft, pRight, pToken);
  if( pNew==0 ){
    sqlite3ExprDelete(pLeft);
    sqlite3ExprDelete(pRight);
  }
  return pNew;
}
................................................................................
** "#1" means the next down on the stack.  And so forth.
**
** This routine is called by the parser to deal with on of those terms.
** It immediately generates code to store the value in a memory location.
** The returns an expression that will code to extract the value from
** that memory location as needed.
*/
static Expr *sqlite3RegisterExpr(Parse *pParse, Token *pToken){
  Vdbe *v = pParse->pVdbe;
  Expr *p;
  int depth;
  if( pParse->nested==0 ){
    sqlite3ErrorMsg(pParse, "near \"%T\": syntax error", pToken);
    return sqlite3Expr(TK_NULL, 0, 0, 0);
  }
................................................................................
  return p;
}

/*
** Join two expressions using an AND operator.  If either expression is
** NULL, then just return the other expression.
*/
static Expr *sqlite3ExprAnd(Expr *pLeft, Expr *pRight){
  if( pLeft==0 ){
    return pRight;
  }else if( pRight==0 ){
    return pLeft;
  }else{
    return sqlite3Expr(TK_AND, pLeft, pRight, 0);
  }
}

/*
** Set the Expr.span field of the given expression to span all
** text between the two given tokens.
*/
static void sqlite3ExprSpan(Expr *pExpr, Token *pLeft, Token *pRight){
  assert( pRight!=0 );
  assert( pLeft!=0 );
  if( !sqlite3MallocFailed() && pRight->z && pLeft->z ){
    assert( pLeft->dyn==0 || pLeft->z[pLeft->n]==0 );
    if( pLeft->dyn==0 && pRight->dyn==0 ){
      pExpr->span.z = pLeft->z;
      pExpr->span.n = pRight->n + (pRight->z - pLeft->z);
................................................................................
  }
}

/*
** Construct a new expression node for a function with multiple
** arguments.
*/
static Expr *sqlite3ExprFunction(ExprList *pList, Token *pToken){
  Expr *pNew;
  assert( pToken );
  pNew = sqliteMalloc( sizeof(Expr) );
  if( pNew==0 ){
    sqlite3ExprListDelete(pList); /* Avoid leaking memory when malloc fails */
    return 0;
  }
................................................................................
** the SQL statement comes from an external source.
**
** Wildcards of the form ":aaa" or "$aaa" are assigned the same number
** as the previous instance of the same wildcard.  Or if this is the first
** instance of the wildcard, the next sequenial variable number is
** assigned.
*/
static void sqlite3ExprAssignVarNumber(Parse *pParse, Expr *pExpr){
  Token *pToken;
  if( pExpr==0 ) return;
  pToken = &pExpr->token;
  assert( pToken->n>=1 );
  assert( pToken->z!=0 );
  assert( pToken->z[0]!=0 );
  if( pToken->n==1 ){
................................................................................
    sqlite3ErrorMsg(pParse, "too many SQL variables");
  }
}

/*
** Recursively delete an expression tree.
*/
static void sqlite3ExprDelete(Expr *p){
  if( p==0 ) return;
  if( p->span.dyn ) sqliteFree((char*)p->span.z);
  if( p->token.dyn ) sqliteFree((char*)p->token.z);
  sqlite3ExprDelete(p->pLeft);
  sqlite3ExprDelete(p->pRight);
  sqlite3ExprListDelete(p->pList);
  sqlite3SelectDelete(p->pSelect);
................................................................................
  sqliteFree(p);
}

/*
** The Expr.token field might be a string literal that is quoted.
** If so, remove the quotation marks.
*/
static void sqlite3DequoteExpr(Expr *p){
  if( ExprHasAnyProperty(p, EP_Dequoted) ){
    return;
  }
  ExprSetProperty(p, EP_Dequoted);
  if( p->token.dyn==0 ){
    sqlite3TokenCopy(&p->token, &p->token);
  }
................................................................................
**
** The expression list, ID, and source lists return by sqlite3ExprListDup(),
** sqlite3IdListDup(), and sqlite3SrcListDup() can not be further expanded 
** by subsequent calls to sqlite*ListAppend() routines.
**
** Any tables that the SrcList might point to are not duplicated.
*/
static Expr *sqlite3ExprDup(Expr *p){
  Expr *pNew;
  if( p==0 ) return 0;
  pNew = sqliteMallocRaw( sizeof(*p) );
  if( pNew==0 ) return 0;
  memcpy(pNew, p, sizeof(*pNew));
  if( p->token.z!=0 ){
    pNew->token.z = (u8*)sqliteStrNDup((char*)p->token.z, p->token.n);
................................................................................
  pNew->span.z = 0;
  pNew->pLeft = sqlite3ExprDup(p->pLeft);
  pNew->pRight = sqlite3ExprDup(p->pRight);
  pNew->pList = sqlite3ExprListDup(p->pList);
  pNew->pSelect = sqlite3SelectDup(p->pSelect);
  return pNew;
}
static void sqlite3TokenCopy(Token *pTo, Token *pFrom){
  if( pTo->dyn ) sqliteFree((char*)pTo->z);
  if( pFrom->z ){
    pTo->n = pFrom->n;
    pTo->z = (u8*)sqliteStrNDup((char*)pFrom->z, pFrom->n);
    pTo->dyn = 1;
  }else{
    pTo->z = 0;
  }
}
static ExprList *sqlite3ExprListDup(ExprList *p){
  ExprList *pNew;
  struct ExprList_item *pItem, *pOldItem;
  int i;
  if( p==0 ) return 0;
  pNew = sqliteMalloc( sizeof(*pNew) );
  if( pNew==0 ) return 0;
  pNew->nExpr = pNew->nAlloc = p->nExpr;
................................................................................
** If cursors, triggers, views and subqueries are all omitted from
** the build, then none of the following routines, except for 
** sqlite3SelectDup(), can be called. sqlite3SelectDup() is sometimes
** called with a NULL argument.
*/
#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_TRIGGER) \
 || !defined(SQLITE_OMIT_SUBQUERY)
static SrcList *sqlite3SrcListDup(SrcList *p){
  SrcList *pNew;
  int i;
  int nByte;
  if( p==0 ) return 0;
  nByte = sizeof(*p) + (p->nSrc>0 ? sizeof(p->a[0]) * (p->nSrc-1) : 0);
  pNew = sqliteMallocRaw( nByte );
  if( pNew==0 ) return 0;
................................................................................
    pNewItem->pSelect = sqlite3SelectDup(pOldItem->pSelect);
    pNewItem->pOn = sqlite3ExprDup(pOldItem->pOn);
    pNewItem->pUsing = sqlite3IdListDup(pOldItem->pUsing);
    pNewItem->colUsed = pOldItem->colUsed;
  }
  return pNew;
}
static IdList *sqlite3IdListDup(IdList *p){
  IdList *pNew;
  int i;
  if( p==0 ) return 0;
  pNew = sqliteMallocRaw( sizeof(*pNew) );
  if( pNew==0 ) return 0;
  pNew->nId = pNew->nAlloc = p->nId;
  pNew->a = sqliteMallocRaw( p->nId*sizeof(p->a[0]) );
................................................................................
    struct IdList_item *pNewItem = &pNew->a[i];
    struct IdList_item *pOldItem = &p->a[i];
    pNewItem->zName = sqliteStrDup(pOldItem->zName);
    pNewItem->idx = pOldItem->idx;
  }
  return pNew;
}
static Select *sqlite3SelectDup(Select *p){
  Select *pNew;
  if( p==0 ) return 0;
  pNew = sqliteMallocRaw( sizeof(*p) );
  if( pNew==0 ) return 0;
  pNew->isDistinct = p->isDistinct;
  pNew->pEList = sqlite3ExprListDup(p->pEList);
  pNew->pSrc = sqlite3SrcListDup(p->pSrc);
................................................................................
  pNew->pRightmost = 0;
  pNew->addrOpenEphm[0] = -1;
  pNew->addrOpenEphm[1] = -1;
  pNew->addrOpenEphm[2] = -1;
  return pNew;
}
#else
static Select *sqlite3SelectDup(Select *p){
  assert( p==0 );
  return 0;
}
#endif


/*
** Add a new element to the end of an expression list.  If pList is
** initially NULL, then create a new expression list.
*/
static ExprList *sqlite3ExprListAppend(ExprList *pList, Expr *pExpr, Token *pName){
  if( pList==0 ){
    pList = sqliteMalloc( sizeof(ExprList) );
    if( pList==0 ){
      goto no_mem;
    }
    assert( pList->nAlloc==0 );
  }
................................................................................
  return 0;
}

/*
** If the expression list pEList contains more than iLimit elements,
** leave an error message in pParse.
*/
static void sqlite3ExprListCheckLength(
  Parse *pParse,
  ExprList *pEList,
  int iLimit,
  const char *zObject
){
  if( pEList && pEList->nExpr>iLimit ){
    sqlite3ErrorMsg(pParse, "too many columns in %s", zObject);
................................................................................
/*
** Set the Expr.nHeight variable in the structure passed as an 
** argument. An expression with no children, Expr.pList or 
** Expr.pSelect member has a height of 1. Any other expression
** has a height equal to the maximum height of any other 
** referenced Expr plus one.
*/
static void sqlite3ExprSetHeight(Expr *p){
  int nHeight = 0;
  heightOfExpr(p->pLeft, &nHeight);
  heightOfExpr(p->pRight, &nHeight);
  heightOfExprList(p->pList, &nHeight);
  heightOfSelect(p->pSelect, &nHeight);
  p->nHeight = nHeight + 1;
}

/*
** Return the maximum height of any expression tree referenced
** by the select statement passed as an argument.
*/
static int sqlite3SelectExprHeight(Select *p){
  int nHeight = 0;
  heightOfSelect(p, &nHeight);
  return nHeight;
}
#endif

/*
** Delete an entire expression list.
*/
static void sqlite3ExprListDelete(ExprList *pList){
  int i;
  struct ExprList_item *pItem;
  if( pList==0 ) return;
  assert( pList->a!=0 || (pList->nExpr==0 && pList->nAlloc==0) );
  assert( pList->nExpr<=pList->nAlloc );
  for(pItem=pList->a, i=0; i<pList->nExpr; i++, pItem++){
    sqlite3ExprDelete(pItem->pExpr);
................................................................................
** Walk an expression tree.  Return 1 if the expression is constant
** and 0 if it involves variables or function calls.
**
** For the purposes of this function, a double-quoted string (ex: "abc")
** is considered a variable but a single-quoted string (ex: 'abc') is
** a constant.
*/
static int sqlite3ExprIsConstant(Expr *p){
  int isConst = 1;
  walkExprTree(p, exprNodeIsConstant, &isConst);
  return isConst;
}

/*
** Walk an expression tree.  Return 1 if the expression is constant
** that does no originate from the ON or USING clauses of a join.
** Return 0 if it involves variables or function calls or terms from
** an ON or USING clause.
*/
static int sqlite3ExprIsConstantNotJoin(Expr *p){
  int isConst = 3;
  walkExprTree(p, exprNodeIsConstant, &isConst);
  return isConst!=0;
}

/*
** Walk an expression tree.  Return 1 if the expression is constant
................................................................................
** or a function call with constant arguments.  Return and 0 if there
** are any variables.
**
** For the purposes of this function, a double-quoted string (ex: "abc")
** is considered a variable but a single-quoted string (ex: 'abc') is
** a constant.
*/
static int sqlite3ExprIsConstantOrFunction(Expr *p){
  int isConst = 2;
  walkExprTree(p, exprNodeIsConstant, &isConst);
  return isConst!=0;
}

/*
** If the expression p codes a constant integer that is small enough
** to fit in a 32-bit integer, return 1 and put the value of the integer
** in *pValue.  If the expression is not an integer or if it is too big
** to fit in a signed 32-bit integer, return 0 and leave *pValue unchanged.
*/
static int sqlite3ExprIsInteger(Expr *p, int *pValue){
  switch( p->op ){
    case TK_INTEGER: {
      if( sqlite3GetInt32((char*)p->token.z, pValue) ){
        return 1;
      }
      break;
    }
................................................................................
  }
  return 0;
}

/*
** Return TRUE if the given string is a row-id column name.
*/
static int sqlite3IsRowid(const char *z){
  if( sqlite3StrICmp(z, "_ROWID_")==0 ) return 1;
  if( sqlite3StrICmp(z, "ROWID")==0 ) return 1;
  if( sqlite3StrICmp(z, "OID")==0 ) return 1;
  return 0;
}

/*
................................................................................
            pDup->flags |= EP_ExpCollate;
          }
          if( pExpr->span.dyn ) sqliteFree((char*)pExpr->span.z);
          if( pExpr->token.dyn ) sqliteFree((char*)pExpr->token.z);
          memcpy(pExpr, pDup, sizeof(*pExpr));
          sqliteFree(pDup);
          cnt = 1;

          assert( zTab==0 && zDb==0 );
          goto lookupname_end_2;
        }
      } 
    }

    /* Advance to the next name context.  The loop will exit when either
................................................................................
** usage.  Make sure all function names are recognized and all functions
** have the correct number of arguments.  Leave an error message
** in pParse->zErrMsg if anything is amiss.  Return the number of errors.
**
** If the expression contains aggregate functions then set the EP_Agg
** property on the expression.
*/
static int sqlite3ExprResolveNames( 
  NameContext *pNC,       /* Namespace to resolve expressions in. */
  Expr *pExpr             /* The expression to be analyzed. */
){
  int savedHasAgg;
  if( pExpr==0 ) return 0;
#if SQLITE_MAX_EXPR_DEPTH>0
  if( (pExpr->nHeight+pNC->pParse->nHeight)>SQLITE_MAX_EXPR_DEPTH ){
................................................................................
**     x IN (4,5,11)              -- IN operator with list on right-hand side
**     x IN (SELECT a FROM b)     -- IN operator with subquery on the right
**
** The pExpr parameter describes the expression that contains the IN
** operator or subquery.
*/
#ifndef SQLITE_OMIT_SUBQUERY
static void sqlite3CodeSubselect(Parse *pParse, Expr *pExpr){
  int testAddr = 0;                       /* One-time test address */
  Vdbe *v = sqlite3GetVdbe(pParse);
  if( v==0 ) return;


  /* This code must be run in its entirety every time it is encountered
  ** if any of the following is true:
................................................................................

/*
** Generate code that will extract the iColumn-th column from
** table pTab and push that column value on the stack.  There
** is an open cursor to pTab in iTable.  If iColumn<0 then
** code is generated that extracts the rowid.
*/
static void sqlite3ExprCodeGetColumn(Vdbe *v, Table *pTab, int iColumn, int iTable){
  if( iColumn<0 ){
    int op = (pTab && IsVirtual(pTab)) ? OP_VRowid : OP_Rowid;
    sqlite3VdbeAddOp(v, op, iTable, 0);
  }else if( pTab==0 ){
    sqlite3VdbeAddOp(v, OP_Column, iTable, iColumn);
  }else{
    int op = IsVirtual(pTab) ? OP_VColumn : OP_Column;
................................................................................
**
** This code depends on the fact that certain token values (ex: TK_EQ)
** are the same as opcode values (ex: OP_Eq) that implement the corresponding
** operation.  Special comments in vdbe.c and the mkopcodeh.awk script in
** the make process cause these values to align.  Assert()s in the code
** below verify that the numbers are aligned correctly.
*/
static void sqlite3ExprCode(Parse *pParse, Expr *pExpr){
  Vdbe *v = pParse->pVdbe;
  int op;
  int stackChng = 1;    /* Amount of change to stack depth */

  if( v==0 ) return;
  if( pExpr==0 ){
    sqlite3VdbeAddOp(v, OP_Null, 0, 0);
................................................................................
**
** This routine might also cache the result and modify the pExpr tree
** so that it will make use of the cached result on subsequent evaluations
** rather than evaluate the whole expression again.  Trivial expressions are
** not cached.  If the expression is cached, its result is stored in a 
** memory location.
*/
static void sqlite3ExprCodeAndCache(Parse *pParse, Expr *pExpr){
  Vdbe *v = pParse->pVdbe;
  int iMem;
  int addr1, addr2;
  if( v==0 ) return;
  addr1 = sqlite3VdbeCurrentAddr(v);
  sqlite3ExprCode(pParse, pExpr);
  addr2 = sqlite3VdbeCurrentAddr(v);
................................................................................

/*
** Generate code that pushes the value of every element of the given
** expression list onto the stack.
**
** Return the number of elements pushed onto the stack.
*/
static int sqlite3ExprCodeExprList(
  Parse *pParse,     /* Parsing context */
  ExprList *pList    /* The expression list to be coded */
){
  struct ExprList_item *pItem;
  int i, n;
  if( pList==0 ) return 0;
  n = pList->nExpr;
................................................................................
**
** This code depends on the fact that certain token values (ex: TK_EQ)
** are the same as opcode values (ex: OP_Eq) that implement the corresponding
** operation.  Special comments in vdbe.c and the mkopcodeh.awk script in
** the make process cause these values to align.  Assert()s in the code
** below verify that the numbers are aligned correctly.
*/
static void sqlite3ExprIfTrue(Parse *pParse, Expr *pExpr, int dest, int jumpIfNull){
  Vdbe *v = pParse->pVdbe;
  int op = 0;
  int ckOffset = pParse->ckOffset;
  if( v==0 || pExpr==0 ) return;
  op = pExpr->op;
  switch( op ){
    case TK_AND: {
................................................................................
** Generate code for a boolean expression such that a jump is made
** to the label "dest" if the expression is false but execution
** continues straight thru if the expression is true.
**
** If the expression evaluates to NULL (neither true nor false) then
** jump if jumpIfNull is true or fall through if jumpIfNull is false.
*/
static void sqlite3ExprIfFalse(Parse *pParse, Expr *pExpr, int dest, int jumpIfNull){
  Vdbe *v = pParse->pVdbe;
  int op = 0;
  int ckOffset = pParse->ckOffset;
  if( v==0 || pExpr==0 ) return;

  /* The value of pExpr->op and op are related as follows:
  **
................................................................................
** returns false, then you do not really know for certain if the two
** expressions are the same.  But if you get a TRUE return, then you
** can be sure the expressions are the same.  In the places where
** this routine is used, it does not hurt to get an extra FALSE - that
** just might result in some slightly slower code.  But returning
** an incorrect TRUE could lead to a malfunction.
*/
static int sqlite3ExprCompare(Expr *pA, Expr *pB){
  int i;
  if( pA==0||pB==0 ){
    return pB==pA;
  }
  if( pA->op!=pB->op ) return 0;
  if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 0;
  if( !sqlite3ExprCompare(pA->pLeft, pB->pLeft) ) return 0;
................................................................................
**
** This routine should only be called after the expression has been
** analyzed by sqlite3ExprResolveNames().
**
** If errors are seen, leave an error message in zErrMsg and return
** the number of errors.
*/
static int sqlite3ExprAnalyzeAggregates(NameContext *pNC, Expr *pExpr){
  int nErr = pNC->pParse->nErr;
  walkExprTree(pExpr, analyzeAggregate, pNC);
  return pNC->pParse->nErr - nErr;
}

/*
** Call sqlite3ExprAnalyzeAggregates() for every expression in an
** expression list.  Return the number of errors.
**
** If an error is found, the analysis is cut short.
*/
static int sqlite3ExprAnalyzeAggList(NameContext *pNC, ExprList *pList){
  struct ExprList_item *pItem;
  int i;
  int nErr = 0;
  if( pList ){
    for(pItem=pList->a, i=0; nErr==0 && i<pList->nExpr; i++, pItem++){
      nErr += sqlite3ExprAnalyzeAggregates(pNC, pItem->pExpr);
    }
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that used to generate VDBE code
** that implements the ALTER TABLE command.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** The code in this file only exists if we are not omitting the
** ALTER TABLE logic from the build.
*/
#ifndef SQLITE_OMIT_ALTERTABLE
................................................................................
  Token tname;
  unsigned char const *zCsr = zSql;
  int len = 0;
  char *zRet;

  /* The principle used to locate the table name in the CREATE TABLE 
  ** statement is that the table name is the first token that is immediatedly
  ** followed by a left parenthesis - TK_LP.
  */
  if( zSql ){
    do {
      if( !*zCsr ){
        /* Ran out of input before finding an opening bracket. Return NULL. */
        return;
      }
................................................................................
      ** and it's length in 'len' (to be used next iteration of this loop).
      */
      do {
        zCsr += len;
        len = sqlite3GetToken(zCsr, &token);
      } while( token==TK_SPACE );
      assert( len>0 );
    } while( token!=TK_LP );

    zRet = sqlite3MPrintf("%.*s%Q%s", tname.z - zSql, zSql, 
       zTableName, tname.z+tname.n);
    sqlite3_result_text(context, zRet, -1, sqlite3FreeX);
  }
}

................................................................................
  }
}
#endif   /* !SQLITE_OMIT_TRIGGER */

/*
** Register built-in functions used to help implement ALTER TABLE
*/
static void sqlite3AlterFunctions(sqlite3 *db){
  static const struct {
     char *zName;
     signed char nArg;
     void (*xFunc)(sqlite3_context*,int,sqlite3_value **);
  } aFuncs[] = {
    { "sqlite_rename_table",    2, renameTableFunc},
#ifndef SQLITE_OMIT_TRIGGER
................................................................................
#endif
}

/*
** Generate code to implement the "ALTER TABLE xxx RENAME TO yyy" 
** command. 
*/
static void sqlite3AlterRenameTable(
  Parse *pParse,            /* Parser context. */
  SrcList *pSrc,            /* The table to rename. */
  Token *pName              /* The new table name. */
){
  int iDb;                  /* Database that contains the table */
  char *zDb;                /* Name of database iDb */
  Table *pTab;              /* Table being renamed */
................................................................................
  sqlite3 *db = pParse->db; /* Database connection */
  int nTabName;             /* Number of UTF-8 characters in zTabName */
  const char *zTabName;     /* Original name of the table */
  Vdbe *v;
#ifndef SQLITE_OMIT_TRIGGER
  char *zWhere = 0;         /* Where clause to locate temp triggers */
#endif

  
  if( sqlite3MallocFailed() ) goto exit_rename_table;
  assert( pSrc->nSrc==1 );

  pTab = sqlite3LocateTable(pParse, pSrc->a[0].zName, pSrc->a[0].zDatabase);
  if( !pTab ) goto exit_rename_table;
#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( IsVirtual(pTab) ){
    sqlite3ErrorMsg(pParse, "virtual tables may not be altered");
    goto exit_rename_table;
  }
#endif
  iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
  zDb = db->aDb[iDb].zName;

  /* Get a NULL terminated version of the new table name. */
  zName = sqlite3NameFromToken(pName);
  if( !zName ) goto exit_rename_table;

................................................................................

#ifndef SQLITE_OMIT_AUTHORIZATION
  /* Invoke the authorization callback. */
  if( sqlite3AuthCheck(pParse, SQLITE_ALTER_TABLE, zDb, pTab->zName, 0) ){
    goto exit_rename_table;
  }
#endif










  /* Begin a transaction and code the VerifyCookie for database iDb. 
  ** Then modify the schema cookie (since the ALTER TABLE modifies the
  ** schema).

  */
  v = sqlite3GetVdbe(pParse);
  if( v==0 ){
    goto exit_rename_table;
  }
  sqlite3BeginWriteOperation(pParse, 0, iDb);
  sqlite3ChangeCookie(db, v, iDb);













  /* figure out how many UTF-8 characters are in zName */
  zTabName = pTab->zName;
  nTabName = sqlite3Utf8CharLen(zTabName, -1);

  /* Modify the sqlite_master table to use the new table name. */
  sqlite3NestedParse(pParse,
................................................................................
** This function is called after an "ALTER TABLE ... ADD" statement
** has been parsed. Argument pColDef contains the text of the new
** column definition.
**
** The Table structure pParse->pNewTable was extended to include
** the new column during parsing.
*/
static void sqlite3AlterFinishAddColumn(Parse *pParse, Token *pColDef){
  Table *pNew;              /* Copy of pParse->pNewTable */
  Table *pTab;              /* Table being altered */
  int iDb;                  /* Database number */
  const char *zDb;          /* Database name */
  const char *zTab;         /* Table name */
  char *zCol;               /* Null-terminated column definition */
  Column *pCol;             /* The new column */
................................................................................
** is parsed (i.e. sqlite3AddColumn()) add the new Column data to 
** the copy. The copy of the Table structure is deleted by tokenize.c 
** after parsing is finished.
**
** Routine sqlite3AlterFinishAddColumn() will be called to complete
** coding the "ALTER TABLE ... ADD" statement.
*/
static void sqlite3AlterBeginAddColumn(Parse *pParse, SrcList *pSrc){
  Table *pNew;
  Table *pTab;
  Vdbe *v;
  int iDb;
  int i;
  int nAlloc;

................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code associated with the ANALYZE command.
**
** @(#) $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
#ifndef SQLITE_OMIT_ANALYZE

/*
** This routine generates code that opens the sqlite_stat1 table on cursor
** iStatCur.
**
................................................................................
    }
    sqlite3VdbeResolveLabel(v, endOfLoop);
    sqlite3VdbeAddOp(v, OP_Next, iIdxCur, topOfLoop);
    sqlite3VdbeAddOp(v, OP_Close, iIdxCur, 0);

    /* Store the results.  
    **
    ** The result is a single row of the sqlite_stmt1 table.  The first
    ** two columns are the names of the table and index.  The third column
    ** is a string composed of a list of integer statistics about the
    ** index.  The first integer in the list is the total number of entires
    ** in the index.  There is one additional integer in the list for each
    ** column of the table.  This additional integer is a guess of how many
    ** rows of the table the index will select.  If D is the count of distinct
    ** values and K is the total number of rows, then the integer is computed
................................................................................
**        ANALYZE  <database>                -- 2
**        ANALYZE  ?<database>.?<tablename>  -- 3
**
** Form 1 causes all indices in all attached databases to be analyzed.
** Form 2 analyzes all indices the single database named.
** Form 3 analyzes all indices associated with the named table.
*/
static void sqlite3Analyze(Parse *pParse, Token *pName1, Token *pName2){
  sqlite3 *db = pParse->db;
  int iDb;
  int i;
  char *z, *zDb;
  Table *pTab;
  Token *pTableName;

................................................................................
  }
  return 0;
}

/*
** Load the content of the sqlite_stat1 table into the index hash tables.
*/
static int sqlite3AnalysisLoad(sqlite3 *db, int iDb){
  analysisInfo sInfo;
  HashElem *i;
  char *zSql;
  int rc;

  /* Clear any prior statistics */
  for(i=sqliteHashFirst(&db->aDb[iDb].pSchema->idxHash);i;i=sqliteHashNext(i)){
................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the ATTACH and DETACH commands.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

#ifndef SQLITE_OMIT_ATTACH
/*
** Resolve an expression that was part of an ATTACH or DETACH statement. This
** is slightly different from resolving a normal SQL expression, because simple
** identifiers are treated as strings, not possible column names or aliases.
................................................................................
}

/*
** Called by the parser to compile a DETACH statement.
**
**     DETACH pDbname
*/
static void sqlite3Detach(Parse *pParse, Expr *pDbname){
  codeAttach(pParse, SQLITE_DETACH, "sqlite_detach", 1, pDbname, 0, 0, pDbname);
}

/*
** Called by the parser to compile an ATTACH statement.
**
**     ATTACH p AS pDbname KEY pKey
*/
static void sqlite3Attach(Parse *pParse, Expr *p, Expr *pDbname, Expr *pKey){
  codeAttach(pParse, SQLITE_ATTACH, "sqlite_attach", 3, p, p, pDbname, pKey);
}
#endif /* SQLITE_OMIT_ATTACH */

/*
** Register the functions sqlite_attach and sqlite_detach.
*/
static void sqlite3AttachFunctions(sqlite3 *db){
#ifndef SQLITE_OMIT_ATTACH
  static const int enc = SQLITE_UTF8;
  sqlite3CreateFunc(db, "sqlite_attach", 3, enc, db, attachFunc, 0, 0);
  sqlite3CreateFunc(db, "sqlite_detach", 1, enc, db, detachFunc, 0, 0);
#endif
}

................................................................................
/*
** Initialize a DbFixer structure.  This routine must be called prior
** to passing the structure to one of the sqliteFixAAAA() routines below.
**
** The return value indicates whether or not fixation is required.  TRUE
** means we do need to fix the database references, FALSE means we do not.
*/
static int sqlite3FixInit(
  DbFixer *pFix,      /* The fixer to be initialized */
  Parse *pParse,      /* Error messages will be written here */
  int iDb,            /* This is the database that must be used */
  const char *zType,  /* "view", "trigger", or "index" */
  const Token *pName  /* Name of the view, trigger, or index */
){
  sqlite3 *db;
................................................................................
** view in one database does not refer to objects in a different database.
** (Exception: indices, triggers, and views in the TEMP database are
** allowed to refer to anything.)  If a reference is explicitly made
** to an object in a different database, an error message is added to
** pParse->zErrMsg and these routines return non-zero.  If everything
** checks out, these routines return 0.
*/
static int sqlite3FixSrcList(
  DbFixer *pFix,       /* Context of the fixation */
  SrcList *pList       /* The Source list to check and modify */
){
  int i;
  const char *zDb;
  struct SrcList_item *pItem;

................................................................................
    if( sqlite3FixSelect(pFix, pItem->pSelect) ) return 1;
    if( sqlite3FixExpr(pFix, pItem->pOn) ) return 1;
#endif
  }
  return 0;
}
#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_TRIGGER)
static int sqlite3FixSelect(
  DbFixer *pFix,       /* Context of the fixation */
  Select *pSelect      /* The SELECT statement to be fixed to one database */
){
  while( pSelect ){
    if( sqlite3FixExprList(pFix, pSelect->pEList) ){
      return 1;
    }
................................................................................
    if( sqlite3FixExpr(pFix, pSelect->pHaving) ){
      return 1;
    }
    pSelect = pSelect->pPrior;
  }
  return 0;
}
static int sqlite3FixExpr(
  DbFixer *pFix,     /* Context of the fixation */
  Expr *pExpr        /* The expression to be fixed to one database */
){
  while( pExpr ){
    if( sqlite3FixSelect(pFix, pExpr->pSelect) ){
      return 1;
    }
................................................................................
    if( sqlite3FixExpr(pFix, pExpr->pRight) ){
      return 1;
    }
    pExpr = pExpr->pLeft;
  }
  return 0;
}
static int sqlite3FixExprList(
  DbFixer *pFix,     /* Context of the fixation */
  ExprList *pList    /* The expression to be fixed to one database */
){
  int i;
  struct ExprList_item *pItem;
  if( pList==0 ) return 0;
  for(i=0, pItem=pList->a; i<pList->nExpr; i++, pItem++){
................................................................................
    }
  }
  return 0;
}
#endif

#ifndef SQLITE_OMIT_TRIGGER
static int sqlite3FixTriggerStep(
  DbFixer *pFix,     /* Context of the fixation */
  TriggerStep *pStep /* The trigger step be fixed to one database */
){
  while( pStep ){
    if( sqlite3FixSelect(pFix, pStep->pSelect) ){
      return 1;
    }
................................................................................
**
*************************************************************************
** This file contains code used to implement the sqlite3_set_authorizer()
** API.  This facility is an optional feature of the library.  Embedded
** systems that do not need this facility may omit it by recompiling
** the library with -DSQLITE_OMIT_AUTHORIZATION=1
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** All of the code in this file may be omitted by defining a single
** macro.
*/
#ifndef SQLITE_OMIT_AUTHORIZATION
................................................................................
** is in pTabList or else it is the NEW or OLD table of a trigger.  
** Check to see if it is OK to read this particular column.
**
** If the auth function returns SQLITE_IGNORE, change the TK_COLUMN 
** instruction into a TK_NULL.  If the auth function returns SQLITE_DENY,
** then generate an error.
*/
static void sqlite3AuthRead(
  Parse *pParse,        /* The parser context */
  Expr *pExpr,          /* The expression to check authorization on */
  SrcList *pTabList     /* All table that pExpr might refer to */
){
  sqlite3 *db = pParse->db;
  int rc;
  Table *pTab;          /* The table being read */
................................................................................

/*
** Do an authorization check using the code and arguments given.  Return
** either SQLITE_OK (zero) or SQLITE_IGNORE or SQLITE_DENY.  If SQLITE_DENY
** is returned, then the error count and error message in pParse are
** modified appropriately.
*/
static int sqlite3AuthCheck(
  Parse *pParse,
  int code,
  const char *zArg1,
  const char *zArg2,
  const char *zArg3
){
  sqlite3 *db = pParse->db;
................................................................................
}

/*
** Push an authorization context.  After this routine is called, the
** zArg3 argument to authorization callbacks will be zContext until
** popped.  Or if pParse==0, this routine is a no-op.
*/
static void sqlite3AuthContextPush(
  Parse *pParse,
  AuthContext *pContext, 
  const char *zContext
){
  pContext->pParse = pParse;
  if( pParse ){
    pContext->zAuthContext = pParse->zAuthContext;
................................................................................
  }
}

/*
** Pop an authorization context that was previously pushed
** by sqlite3AuthContextPush
*/
static void sqlite3AuthContextPop(AuthContext *pContext){
  if( pContext->pParse ){
    pContext->pParse->zAuthContext = pContext->zAuthContext;
    pContext->pParse = 0;
  }
}

#endif /* SQLITE_OMIT_AUTHORIZATION */
................................................................................
**     CREATE INDEX
**     DROP INDEX
**     creating ID lists
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Initialize the pParse structure as needed.
*/
static void sqlite3BeginParse(Parse *pParse, int explainFlag){
  pParse->explain = explainFlag;
  pParse->nVar = 0;
}

#ifndef SQLITE_OMIT_SHARED_CACHE
/*
** The TableLock structure is only used by the sqlite3TableLock() and
................................................................................
** The table to be locked has root page iTab and is found in database iDb.
** A read or a write lock can be taken depending on isWritelock.
**
** This routine just records the fact that the lock is desired.  The
** code to make the lock occur is generated by a later call to
** codeTableLocks() which occurs during sqlite3FinishCoding().
*/
static void sqlite3TableLock(
  Parse *pParse,     /* Parsing context */
  int iDb,           /* Index of the database containing the table to lock */
  int iTab,          /* Root page number of the table to be locked */
  u8 isWriteLock,    /* True for a write lock */
  const char *zName  /* Name of the table to be locked */
){
  int i;
................................................................................
** prepared.  This routine puts the finishing touches on the
** VDBE program and resets the pParse structure for the next
** parse.
**
** Note that if an error occurred, it might be the case that
** no VDBE code was generated.
*/
static void sqlite3FinishCoding(Parse *pParse){
  sqlite3 *db;
  Vdbe *v;

  if( sqlite3MallocFailed() ) return;
  if( pParse->nested ) return;
  if( !pParse->pVdbe ){
    if( pParse->rc==SQLITE_OK && pParse->nErr ){
................................................................................
** and finalization steps are omitted because those are handling by the
** outermost parser.
**
** Not everything is nestable.  This facility is designed to permit
** INSERT, UPDATE, and DELETE operations against SQLITE_MASTER.  Use
** care if you decide to try to use this routine for some other purposes.
*/
static void sqlite3NestedParse(Parse *pParse, const char *zFormat, ...){
  va_list ap;
  char *zSql;
# define SAVE_SZ  (sizeof(Parse) - offsetof(Parse,nVar))
  char saveBuf[SAVE_SZ];

  if( pParse->nErr ) return;
  assert( pParse->nested<10 );  /* Nesting should only be of limited depth */
................................................................................
** If zDatabase is 0, all databases are searched for the table and the
** first matching table is returned.  (No checking for duplicate table
** names is done.)  The search order is TEMP first, then MAIN, then any
** auxiliary databases added using the ATTACH command.
**
** See also sqlite3LocateTable().
*/
static Table *sqlite3FindTable(sqlite3 *db, const char *zName, const char *zDatabase){
  Table *p = 0;
  int i;
  assert( zName!=0 );
  for(i=OMIT_TEMPDB; i<db->nDb; i++){
    int j = (i<2) ? i^1 : i;   /* Search TEMP before MAIN */
    if( zDatabase!=0 && sqlite3StrICmp(zDatabase, db->aDb[j].zName) ) continue;
    p = sqlite3HashFind(&db->aDb[j].pSchema->tblHash, zName, strlen(zName)+1);
................................................................................
** database containing the table.  Return NULL if not found.  Also leave an
** error message in pParse->zErrMsg.
**
** The difference between this routine and sqlite3FindTable() is that this
** routine leaves an error message in pParse->zErrMsg where
** sqlite3FindTable() does not.
*/
static Table *sqlite3LocateTable(Parse *pParse, const char *zName, const char *zDbase){
  Table *p;

  /* Read the database schema. If an error occurs, leave an error message
  ** and code in pParse and return NULL. */
  if( SQLITE_OK!=sqlite3ReadSchema(pParse) ){
    return 0;
  }
................................................................................
**
** If zDatabase is 0, all databases are searched for the
** table and the first matching index is returned.  (No checking
** for duplicate index names is done.)  The search order is
** TEMP first, then MAIN, then any auxiliary databases added
** using the ATTACH command.
*/
static Index *sqlite3FindIndex(sqlite3 *db, const char *zName, const char *zDb){
  Index *p = 0;
  int i;
  for(i=OMIT_TEMPDB; i<db->nDb; i++){
    int j = (i<2) ? i^1 : i;  /* Search TEMP before MAIN */
    Schema *pSchema = db->aDb[j].pSchema;
    if( zDb && sqlite3StrICmp(zDb, db->aDb[j].zName) ) continue;
    assert( pSchema || (j==1 && !db->aDb[1].pBt) );
................................................................................

/*
** For the index called zIdxName which is found in the database iDb,
** unlike that index from its Table then remove the index from
** the index hash table and free all memory structures associated
** with the index.
*/
static void sqlite3UnlinkAndDeleteIndex(sqlite3 *db, int iDb, const char *zIdxName){
  Index *pIndex;
  int len;
  Hash *pHash = &db->aDb[iDb].pSchema->idxHash;

  len = strlen(zIdxName);
  pIndex = sqlite3HashInsert(pHash, zIdxName, len+1, 0);
  if( pIndex ){
................................................................................
** if there were schema changes during the transaction or if a
** schema-cookie mismatch occurs.
**
** If iDb<=0 then reset the internal schema tables for all database
** files.  If iDb>=2 then reset the internal schema for only the
** single file indicated.
*/
static void sqlite3ResetInternalSchema(sqlite3 *db, int iDb){
  int i, j;

  assert( iDb>=0 && iDb<db->nDb );
  for(i=iDb; i<db->nDb; i++){
    Db *pDb = &db->aDb[i];
    if( pDb->pSchema ){
      sqlite3SchemaFree(pDb->pSchema);
................................................................................
    db->aDb = db->aDbStatic;
  }
}

/*
** This routine is called when a commit occurs.
*/
static void sqlite3CommitInternalChanges(sqlite3 *db){
  db->flags &= ~SQLITE_InternChanges;
}

/*
** Clear the column names from a table or view.
*/
static void sqliteResetColumnNames(Table *pTable){
................................................................................
**
** This routine just deletes the data structure.  It does not unlink
** the table data structure from the hash table.  Nor does it remove
** foreign keys from the sqlite.aFKey hash table.  But it does destroy
** memory structures of the indices and foreign keys associated with 
** the table.
*/
static void sqlite3DeleteTable(Table *pTable){
  Index *pIndex, *pNext;
  FKey *pFKey, *pNextFKey;

  if( pTable==0 ) return;

  /* Do not delete the table until the reference count reaches zero. */
  pTable->nRef--;
................................................................................
  sqliteFree(pTable);
}

/*
** Unlink the given table from the hash tables and the delete the
** table structure with all its indices and foreign keys.
*/
static void sqlite3UnlinkAndDeleteTable(sqlite3 *db, int iDb, const char *zTabName){
  Table *p;
  FKey *pF1, *pF2;
  Db *pDb;

  assert( db!=0 );
  assert( iDb>=0 && iDb<db->nDb );
  assert( zTabName && zTabName[0] );
................................................................................
** is obtained from sqliteMalloc() and must be freed by the calling
** function.
**
** Tokens are often just pointers into the original SQL text and so
** are not \000 terminated and are not persistent.  The returned string
** is \000 terminated and is persistent.
*/
static char *sqlite3NameFromToken(Token *pName){
  char *zName;
  if( pName ){
    zName = sqliteStrNDup((char*)pName->z, pName->n);
    sqlite3Dequote(zName);
  }else{
    zName = 0;
  }
................................................................................
  return zName;
}

/*
** Open the sqlite_master table stored in database number iDb for
** writing. The table is opened using cursor 0.
*/
static void sqlite3OpenMasterTable(Parse *p, int iDb){
  Vdbe *v = sqlite3GetVdbe(p);
  sqlite3TableLock(p, iDb, MASTER_ROOT, 1, SCHEMA_TABLE(iDb));
  sqlite3VdbeAddOp(v, OP_Integer, iDb, 0);
  sqlite3VdbeAddOp(v, OP_OpenWrite, 0, MASTER_ROOT);
  sqlite3VdbeAddOp(v, OP_SetNumColumns, 0, 5); /* sqlite_master has 5 columns */
}

/*
** The token *pName contains the name of a database (either "main" or
** "temp" or the name of an attached db). This routine returns the
** index of the named database in db->aDb[], or -1 if the named db 
** does not exist.
*/
static int sqlite3FindDb(sqlite3 *db, Token *pName){
  int i = -1;    /* Database number */
  int n;         /* Number of characters in the name */
  Db *pDb;       /* A database whose name space is being searched */
  char *zName;   /* Name we are searching for */

  zName = sqlite3NameFromToken(pName);
  if( zName ){
................................................................................
**
** Then pName1 is set to "yyy" and pName2 is "".
**
** This routine sets the *ppUnqual pointer to point at the token (pName1 or
** pName2) that stores the unqualified table name.  The index of the
** database "xxx" is returned.
*/
static int sqlite3TwoPartName(
  Parse *pParse,      /* Parsing and code generating context */
  Token *pName1,      /* The "xxx" in the name "xxx.yyy" or "xxx" */
  Token *pName2,      /* The "yyy" in the name "xxx.yyy" */
  Token **pUnqual     /* Write the unqualified object name here */
){
  int iDb;                    /* Database holding the object */
  sqlite3 *db = pParse->db;
................................................................................
/*
** This routine is used to check if the UTF-8 string zName is a legal
** unqualified name for a new schema object (table, index, view or
** trigger). All names are legal except those that begin with the string
** "sqlite_" (in upper, lower or mixed case). This portion of the namespace
** is reserved for internal use.
*/
static int sqlite3CheckObjectName(Parse *pParse, const char *zName){
  if( !pParse->db->init.busy && pParse->nested==0 
          && (pParse->db->flags & SQLITE_WriteSchema)==0
          && 0==sqlite3StrNICmp(zName, "sqlite_", 7) ){
    sqlite3ErrorMsg(pParse, "object name reserved for internal use: %s", zName);
    return SQLITE_ERROR;
  }
  return SQLITE_OK;
................................................................................
**
** The new table record is initialized and put in pParse->pNewTable.
** As more of the CREATE TABLE statement is parsed, additional action
** routines will be called to add more information to this record.
** At the end of the CREATE TABLE statement, the sqlite3EndTable() routine
** is called to complete the construction of the new table record.
*/
static void sqlite3StartTable(
  Parse *pParse,   /* Parser context */
  Token *pName1,   /* First part of the name of the table or view */
  Token *pName2,   /* Second part of the name of the table or view */
  int isTemp,      /* True if this is a TEMP table */
  int isView,      /* True if this is a VIEW */
  int isVirtual,   /* True if this is a VIRTUAL table */
  int noErr        /* Do nothing if table already exists */
................................................................................
** Add a new column to the table currently being constructed.
**
** The parser calls this routine once for each column declaration
** in a CREATE TABLE statement.  sqlite3StartTable() gets called
** first to get things going.  Then this routine is called for each
** column.
*/
static void sqlite3AddColumn(Parse *pParse, Token *pName){
  Table *p;
  int i;
  char *z;
  Column *pCol;
  if( (p = pParse->pNewTable)==0 ) return;
  if( p->nCol+1>SQLITE_MAX_COLUMN ){
    sqlite3ErrorMsg(pParse, "too many columns on %s", p->zName);
................................................................................

/*
** This routine is called by the parser while in the middle of
** parsing a CREATE TABLE statement.  A "NOT NULL" constraint has
** been seen on a column.  This routine sets the notNull flag on
** the column currently under construction.
*/
static void sqlite3AddNotNull(Parse *pParse, int onError){
  Table *p;
  int i;
  if( (p = pParse->pNewTable)==0 ) return;
  i = p->nCol-1;
  if( i>=0 ) p->aCol[i].notNull = onError;
}

................................................................................
** 'REAL'        | SQLITE_AFF_REAL
** 'FLOA'        | SQLITE_AFF_REAL
** 'DOUB'        | SQLITE_AFF_REAL
**
** If none of the substrings in the above table are found,
** SQLITE_AFF_NUMERIC is returned.
*/
static char sqlite3AffinityType(const Token *pType){
  u32 h = 0;
  char aff = SQLITE_AFF_NUMERIC;
  const unsigned char *zIn = pType->z;
  const unsigned char *zEnd = &pType->z[pType->n];

  while( zIn!=zEnd ){
    h = (h<<8) + sqlite3UpperToLower[*zIn];
................................................................................
** parsing a CREATE TABLE statement.  The pFirst token is the first
** token in the sequence of tokens that describe the type of the
** column currently under construction.   pLast is the last token
** in the sequence.  Use this information to construct a string
** that contains the typename of the column and store that string
** in zType.
*/ 
static void sqlite3AddColumnType(Parse *pParse, Token *pType){
  Table *p;
  int i;
  Column *pCol;

  if( (p = pParse->pNewTable)==0 ) return;
  i = p->nCol-1;
  if( i<0 ) return;
................................................................................
**
** Default value expressions must be constant.  Raise an exception if this
** is not the case.
**
** This routine is called by the parser while in the middle of
** parsing a CREATE TABLE statement.
*/
static void sqlite3AddDefaultValue(Parse *pParse, Expr *pExpr){
  Table *p;
  Column *pCol;
  if( (p = pParse->pNewTable)!=0 ){
    pCol = &(p->aCol[p->nCol-1]);
    if( !sqlite3ExprIsConstantOrFunction(pExpr) ){
      sqlite3ErrorMsg(pParse, "default value of column [%s] is not constant",
          pCol->zName);
................................................................................
** field of the table under construction to be the index of the
** INTEGER PRIMARY KEY column.  Table.iPKey is set to -1 if there is
** no INTEGER PRIMARY KEY.
**
** If the key is not an INTEGER PRIMARY KEY, then create a unique
** index for the key.  No index is created for INTEGER PRIMARY KEYs.
*/
static void sqlite3AddPrimaryKey(
  Parse *pParse,    /* Parsing context */
  ExprList *pList,  /* List of field names to be indexed */
  int onError,      /* What to do with a uniqueness conflict */
  int autoInc,      /* True if the AUTOINCREMENT keyword is present */
  int sortOrder     /* SQLITE_SO_ASC or SQLITE_SO_DESC */
){
  Table *pTab = pParse->pNewTable;
................................................................................
  sqlite3ExprListDelete(pList);
  return;
}

/*
** Add a new CHECK constraint to the table currently under construction.
*/
static void sqlite3AddCheckConstraint(
  Parse *pParse,    /* Parsing context */
  Expr *pCheckExpr  /* The check expression */
){
#ifndef SQLITE_OMIT_CHECK
  Table *pTab = pParse->pNewTable;
  if( pTab && !IN_DECLARE_VTAB ){
    /* The CHECK expression must be duplicated so that tokens refer
................................................................................
  sqlite3ExprDelete(pCheckExpr);
}

/*
** Set the collation function of the most recently parsed table column
** to the CollSeq given.
*/
static void sqlite3AddCollateType(Parse *pParse, const char *zType, int nType){
  Table *p;
  int i;

  if( (p = pParse->pNewTable)==0 ) return;
  i = p->nCol-1;

  if( sqlite3LocateCollSeq(pParse, zType, nType) ){
................................................................................
** another error occurs, NULL is returned and an error message written into
** pParse.
**
** This routine is a wrapper around sqlite3FindCollSeq().  This routine
** invokes the collation factory if the named collation cannot be found
** and generates an error message.
*/
static CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName){
  sqlite3 *db = pParse->db;
  u8 enc = ENC(db);
  u8 initbusy = db->init.busy;
  CollSeq *pColl;

  pColl = sqlite3FindCollSeq(db, enc, zName, nName, initbusy);
  if( !initbusy && (!pColl || !pColl->xCmp) ){
................................................................................
**
** This plan is not completely bullet-proof.  It is possible for
** the schema to change multiple times and for the cookie to be
** set back to prior value.  But schema changes are infrequent
** and the probability of hitting the same cookie value is only
** 1 chance in 2^32.  So we're safe enough.
*/
static void sqlite3ChangeCookie(sqlite3 *db, Vdbe *v, int iDb){
  sqlite3VdbeAddOp(v, OP_Integer, db->aDb[iDb].pSchema->schema_cookie+1, 0);
  sqlite3VdbeAddOp(v, OP_SetCookie, iDb, 0);
}

/*
** Measure the number of characters needed to output the given
** identifier.  The number returned includes any quotes used
................................................................................
** the sqlite_master table.  We do not want to create it again.
**
** If the pSelect argument is not NULL, it means that this routine
** was called to create a table generated from a 
** "CREATE TABLE ... AS SELECT ..." statement.  The column names of
** the new table will match the result set of the SELECT.
*/
static void sqlite3EndTable(
  Parse *pParse,          /* Parse context */
  Token *pCons,           /* The ',' token after the last column defn. */
  Token *pEnd,            /* The final ')' token in the CREATE TABLE */
  Select *pSelect         /* Select from a "CREATE ... AS SELECT" */
){
  Table *p;
  sqlite3 *db = pParse->db;
................................................................................
  }
}

#ifndef SQLITE_OMIT_VIEW
/*
** The parser calls this routine in order to create a new VIEW
*/
static void sqlite3CreateView(
  Parse *pParse,     /* The parsing context */
  Token *pBegin,     /* The CREATE token that begins the statement */
  Token *pName1,     /* The token that holds the name of the view */
  Token *pName2,     /* The token that holds the name of the view */
  Select *pSelect,   /* A SELECT statement that will become the new view */
  int isTemp,        /* TRUE for a TEMPORARY view */
  int noErr          /* Suppress error messages if VIEW already exists */
................................................................................

#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
/*
** The Table structure pTable is really a VIEW.  Fill in the names of
** the columns of the view in the pTable structure.  Return the number
** of errors.  If an error is seen leave an error message in pParse->zErrMsg.
*/
static int sqlite3ViewGetColumnNames(Parse *pParse, Table *pTable){
  Table *pSelTab;   /* A fake table from which we get the result set */
  Select *pSel;     /* Copy of the SELECT that implements the view */
  int nErr = 0;     /* Number of errors encountered */
  int n;            /* Temporarily holds the number of cursors assigned */

  assert( pTable );

................................................................................
** because the first match might be for one of the deleted indices
** or tables and not the table/index that is actually being moved.
** We must continue looping until all tables and indices with
** rootpage==iFrom have been converted to have a rootpage of iTo
** in order to be certain that we got the right one.
*/
#ifndef SQLITE_OMIT_AUTOVACUUM
static void sqlite3RootPageMoved(Db *pDb, int iFrom, int iTo){
  HashElem *pElem;
  Hash *pHash;

  pHash = &pDb->pSchema->tblHash;
  for(pElem=sqliteHashFirst(pHash); pElem; pElem=sqliteHashNext(pElem)){
    Table *pTab = sqliteHashData(pElem);
    if( pTab->tnum==iFrom ){
................................................................................
#endif
}

/*
** This routine is called to do the work of a DROP TABLE statement.
** pName is the name of the table to be dropped.
*/
static void sqlite3DropTable(Parse *pParse, SrcList *pName, int isView, int noErr){
  Table *pTab;
  Vdbe *v;
  sqlite3 *db = pParse->db;
  int iDb;

  if( pParse->nErr || sqlite3MallocFailed() ){
    goto exit_drop_table;
................................................................................
** under construction in the pParse->pNewTable field.  The new FKey
** is not linked into db->aFKey at this point - that does not happen
** until sqlite3EndTable().
**
** The foreign key is set for IMMEDIATE processing.  A subsequent call
** to sqlite3DeferForeignKey() might change this to DEFERRED.
*/
static void sqlite3CreateForeignKey(
  Parse *pParse,       /* Parsing context */
  ExprList *pFromCol,  /* Columns in this table that point to other table */
  Token *pTo,          /* Name of the other table */
  ExprList *pToCol,    /* Columns in the other table */
  int flags            /* Conflict resolution algorithms. */
){
#ifndef SQLITE_OMIT_FOREIGN_KEY
................................................................................
/*
** This routine is called when an INITIALLY IMMEDIATE or INITIALLY DEFERRED
** clause is seen as part of a foreign key definition.  The isDeferred
** parameter is 1 for INITIALLY DEFERRED and 0 for INITIALLY IMMEDIATE.
** The behavior of the most recently created foreign key is adjusted
** accordingly.
*/
static void sqlite3DeferForeignKey(Parse *pParse, int isDeferred){
#ifndef SQLITE_OMIT_FOREIGN_KEY
  Table *pTab;
  FKey *pFKey;
  if( (pTab = pParse->pNewTable)==0 || (pFKey = pTab->pFKey)==0 ) return;
  pFKey->isDeferred = isDeferred;
#endif
}
................................................................................
** as the table to be indexed.  pParse->pNewTable is a table that is
** currently being constructed by a CREATE TABLE statement.
**
** pList is a list of columns to be indexed.  pList will be NULL if this
** is a primary key or unique-constraint on the most recent column added
** to the table currently under construction.  
*/
static void sqlite3CreateIndex(
  Parse *pParse,     /* All information about this parse */
  Token *pName1,     /* First part of index name. May be NULL */
  Token *pName2,     /* Second part of index name. May be NULL */
  SrcList *pTblName, /* Table to index. Use pParse->pNewTable if 0 */
  ExprList *pList,   /* A list of columns to be indexed */
  int onError,       /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */
  Token *pStart,     /* The CREATE token that begins a CREATE TABLE statement */
  Token *pEnd,       /* The ")" that closes the CREATE INDEX statement */
  int sortOrder,     /* Sort order of primary key when pList==NULL */
  int ifNotExist     /* Omit error if index already exists */
){
  Table *pTab = 0;     /* Table to be indexed */
  Index *pIndex = 0;   /* The index to be created */
  char *zName = 0;     /* Name of the index */
................................................................................
  return;
}

/*
** Generate code to make sure the file format number is at least minFormat.
** The generated code will increase the file format number if necessary.
*/
static void sqlite3MinimumFileFormat(Parse *pParse, int iDb, int minFormat){
  Vdbe *v;
  v = sqlite3GetVdbe(pParse);
  if( v ){
    sqlite3VdbeAddOp(v, OP_ReadCookie, iDb, 1);
    sqlite3VdbeAddOp(v, OP_Integer, minFormat, 0);
    sqlite3VdbeAddOp(v, OP_Ge, 0, sqlite3VdbeCurrentAddr(v)+3);
    sqlite3VdbeAddOp(v, OP_Integer, minFormat, 0);
................................................................................
**           aiRowEst[N]<=aiRowEst[N-1]
**           aiRowEst[N]>=1
**
** Apart from that, we have little to go on besides intuition as to
** how aiRowEst[] should be initialized.  The numbers generated here
** are based on typical values found in actual indices.
*/
static void sqlite3DefaultRowEst(Index *pIdx){
  unsigned *a = pIdx->aiRowEst;
  int i;
  assert( a!=0 );
  a[0] = 1000000;
  for(i=pIdx->nColumn; i>=5; i--){
    a[i] = 5;
  }
................................................................................
  }
}

/*
** This routine will drop an existing named index.  This routine
** implements the DROP INDEX statement.
*/
static void sqlite3DropIndex(Parse *pParse, SrcList *pName, int ifExists){
  Index *pIndex;
  Vdbe *v;
  sqlite3 *db = pParse->db;
  int iDb;

  if( pParse->nErr || sqlite3MallocFailed() ){
    goto exit_drop_index;
................................................................................
**
** The index of the new entry is returned in *pIdx.
**
** This routine returns a pointer to the array of objects.  This
** might be the same as the pArray parameter or it might be a different
** pointer if the array was resized.
*/
static void *sqlite3ArrayAllocate(
  void *pArray,     /* Array of objects.  Might be reallocated */
  int szEntry,      /* Size of each object in the array */
  int initSize,     /* Suggested initial allocation, in elements */
  int *pnEntry,     /* Number of objects currently in use */
  int *pnAlloc,     /* Current size of the allocation, in elements */
  int *pIdx         /* Write the index of a new slot here */
){
................................................................................

/*
** Append a new element to the given IdList.  Create a new IdList if
** need be.
**
** A new IdList is returned, or NULL if malloc() fails.
*/
static IdList *sqlite3IdListAppend(IdList *pList, Token *pToken){
  int i;
  if( pList==0 ){
    pList = sqliteMalloc( sizeof(IdList) );
    if( pList==0 ) return 0;
    pList->nAlloc = 0;
  }
  pList->a = sqlite3ArrayAllocate(
................................................................................
  pList->a[i].zName = sqlite3NameFromToken(pToken);
  return pList;
}

/*
** Delete an IdList.
*/
static void sqlite3IdListDelete(IdList *pList){
  int i;
  if( pList==0 ) return;
  for(i=0; i<pList->nId; i++){
    sqliteFree(pList->a[i].zName);
  }
  sqliteFree(pList->a);
  sqliteFree(pList);
}

/*
** Return the index in pList of the identifier named zId.  Return -1
** if not found.
*/
static int sqlite3IdListIndex(IdList *pList, const char *zName){
  int i;
  if( pList==0 ) return -1;
  for(i=0; i<pList->nId; i++){
    if( sqlite3StrICmp(pList->a[i].zName, zName)==0 ) return i;
  }
  return -1;
}
................................................................................
** Then B is a table name and the database name is unspecified.  If called
** like this:
**
**         sqlite3SrcListAppend(A,B,C);
**
** Then C is the table name and B is the database name.
*/
static SrcList *sqlite3SrcListAppend(SrcList *pList, Token *pTable, Token *pDatabase){
  struct SrcList_item *pItem;
  if( pList==0 ){
    pList = sqliteMalloc( sizeof(SrcList) );
    if( pList==0 ) return 0;
    pList->nAlloc = 1;
  }
  if( pList->nSrc>=pList->nAlloc ){
................................................................................
  pList->nSrc++;
  return pList;
}

/*
** Assign cursors to all tables in a SrcList
*/
static void sqlite3SrcListAssignCursors(Parse *pParse, SrcList *pList){
  int i;
  struct SrcList_item *pItem;
  assert(pList || sqlite3MallocFailed() );
  if( pList ){
    for(i=0, pItem=pList->a; i<pList->nSrc; i++, pItem++){
      if( pItem->iCursor>=0 ) break;
      pItem->iCursor = pParse->nTab++;
................................................................................
    }
  }
}

/*
** Delete an entire SrcList including all its substructure.
*/
static void sqlite3SrcListDelete(SrcList *pList){
  int i;
  struct SrcList_item *pItem;
  if( pList==0 ) return;
  for(pItem=pList->a, i=0; i<pList->nSrc; i++, pItem++){
    sqliteFree(pItem->zDatabase);
    sqliteFree(pItem->zName);
    sqliteFree(pItem->zAlias);
................................................................................
** SELECT statement that the subquery encodes.  The pTable and
** pDatabase parameters are NULL for subqueries.  The pOn and pUsing
** parameters are the content of the ON and USING clauses.
**
** Return a new SrcList which encodes is the FROM with the new
** term added.
*/
static SrcList *sqlite3SrcListAppendFromTerm(
  SrcList *p,             /* The left part of the FROM clause already seen */
  Token *pTable,          /* Name of the table to add to the FROM clause */
  Token *pDatabase,       /* Name of the database containing pTable */
  Token *pAlias,          /* The right-hand side of the AS subexpression */
  Select *pSubquery,      /* A subquery used in place of a table name */
  Expr *pOn,              /* The ON clause of a join */
  IdList *pUsing          /* The USING clause of a join */
................................................................................
**
**           A natural cross join B
**
** The operator is "natural cross join".  The A and B operands are stored
** in p->a[0] and p->a[1], respectively.  The parser initially stores the
** operator with A.  This routine shifts that operator over to B.
*/
static void sqlite3SrcListShiftJoinType(SrcList *p){
  if( p && p->a ){
    int i;
    for(i=p->nSrc-1; i>0; i--){
      p->a[i].jointype = p->a[i-1].jointype;
    }
    p->a[0].jointype = 0;
  }
}

/*
** Begin a transaction
*/
static void sqlite3BeginTransaction(Parse *pParse, int type){
  sqlite3 *db;
  Vdbe *v;
  int i;

  if( pParse==0 || (db=pParse->db)==0 || db->aDb[0].pBt==0 ) return;
  if( pParse->nErr || sqlite3MallocFailed() ) return;
  if( sqlite3AuthCheck(pParse, SQLITE_TRANSACTION, "BEGIN", 0, 0) ) return;
................................................................................
  }
  sqlite3VdbeAddOp(v, OP_AutoCommit, 0, 0);
}

/*
** Commit a transaction
*/
static void sqlite3CommitTransaction(Parse *pParse){
  sqlite3 *db;
  Vdbe *v;

  if( pParse==0 || (db=pParse->db)==0 || db->aDb[0].pBt==0 ) return;
  if( pParse->nErr || sqlite3MallocFailed() ) return;
  if( sqlite3AuthCheck(pParse, SQLITE_TRANSACTION, "COMMIT", 0, 0) ) return;

................................................................................
    sqlite3VdbeAddOp(v, OP_AutoCommit, 1, 0);
  }
}

/*
** Rollback a transaction
*/
static void sqlite3RollbackTransaction(Parse *pParse){
  sqlite3 *db;
  Vdbe *v;

  if( pParse==0 || (db=pParse->db)==0 || db->aDb[0].pBt==0 ) return;
  if( pParse->nErr || sqlite3MallocFailed() ) return;
  if( sqlite3AuthCheck(pParse, SQLITE_TRANSACTION, "ROLLBACK", 0, 0) ) return;

................................................................................
  }
}

/*
** Make sure the TEMP database is open and available for use.  Return
** the number of errors.  Leave any error messages in the pParse structure.
*/
static int sqlite3OpenTempDatabase(Parse *pParse){
  sqlite3 *db = pParse->db;
  if( db->aDb[1].pBt==0 && !pParse->explain ){
    int rc = sqlite3BtreeFactory(db, 0, 0, SQLITE_DEFAULT_CACHE_SIZE,
                                 &db->aDb[1].pBt);
    if( rc!=SQLITE_OK ){
      sqlite3ErrorMsg(pParse, "unable to open a temporary database "
        "file for storing temporary tables");
................................................................................
** will be made to point to that subroutine.  The generation of the
** cookie verification subroutine code happens in sqlite3FinishCoding().
**
** If iDb<0 then code the OP_Goto only - don't set flag to verify the
** schema on any databases.  This can be used to position the OP_Goto
** early in the code, before we know if any database tables will be used.
*/
static void sqlite3CodeVerifySchema(Parse *pParse, int iDb){
  sqlite3 *db;
  Vdbe *v;
  int mask;

  v = sqlite3GetVdbe(pParse);
  if( v==0 ) return;  /* This only happens if there was a prior error */
  db = pParse->db;
................................................................................
** necessary to undo a write and the checkpoint should not be set.
**
** Only database iDb and the temp database are made writable by this call.
** If iDb==0, then the main and temp databases are made writable.   If
** iDb==1 then only the temp database is made writable.  If iDb>1 then the
** specified auxiliary database and the temp database are made writable.
*/
static void sqlite3BeginWriteOperation(Parse *pParse, int setStatement, int iDb){
  Vdbe *v = sqlite3GetVdbe(pParse);
  if( v==0 ) return;
  sqlite3CodeVerifySchema(pParse, iDb);
  pParse->writeMask |= 1<<iDb;
  if( setStatement && pParse->nested==0 ){
    sqlite3VdbeAddOp(v, OP_Statement, iDb, 0);
  }
................................................................................
**
** Form 1 causes all indices in all attached databases to be rebuilt.
** Form 2 rebuilds all indices in all databases that use the named
** collating function.  Forms 3 and 4 rebuild the named index or all
** indices associated with the named table.
*/
#ifndef SQLITE_OMIT_REINDEX
static void sqlite3Reindex(Parse *pParse, Token *pName1, Token *pName2){
  CollSeq *pColl;             /* Collating sequence to be reindexed, or NULL */
  char *z;                    /* Name of a table or index */
  const char *zDb;            /* Name of the database */
  Table *pTab;                /* A table in the database */
  Index *pIndex;              /* An index associated with pTab */
  int iDb;                    /* The database index number */
  sqlite3 *db = pParse->db;   /* The database connection */
................................................................................
**
** If successful, a pointer to the new structure is returned. In this case
** the caller is responsible for calling sqliteFree() on the returned 
** pointer. If an error occurs (out of memory or missing collation 
** sequence), NULL is returned and the state of pParse updated to reflect
** the error.
*/
static KeyInfo *sqlite3IndexKeyinfo(Parse *pParse, Index *pIdx){
  int i;
  int nCol = pIdx->nColumn;
  int nBytes = sizeof(KeyInfo) + (nCol-1)*sizeof(CollSeq*) + nCol;
  KeyInfo *pKey = (KeyInfo *)sqliteMalloc(nBytes);

  if( pKey ){
    pKey->aSortOrder = (u8 *)&(pKey->aColl[nCol]);
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains functions used to access the internal hash tables
** of user defined functions and collation sequences.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/


/*
** Invoke the 'collation needed' callback to request a collation sequence
** in the database text encoding of name zName, length nName.
** If the collation sequence
................................................................................
** If it is not NULL, then pColl must point to the database native encoding 
** collation sequence with name zName, length nName.
**
** The return value is either the collation sequence to be used in database
** db for collation type name zName, length nName, or NULL, if no collation
** sequence can be found.
*/
static CollSeq *sqlite3GetCollSeq(
  sqlite3* db, 
  CollSeq *pColl, 
  const char *zName, 
  int nName
){
  CollSeq *p;

................................................................................
** that have not been defined by sqlite3_create_collation() etc.
**
** If required, this routine calls the 'collation needed' callback to
** request a definition of the collating sequence. If this doesn't work, 
** an equivalent collating sequence that uses a text encoding different
** from the main database is substituted, if one is available.
*/
static int sqlite3CheckCollSeq(Parse *pParse, CollSeq *pColl){
  if( pColl ){
    const char *zName = pColl->zName;
    CollSeq *p = sqlite3GetCollSeq(pParse->db, pColl, zName, -1);
    if( !p ){
      if( pParse->nErr==0 ){
        sqlite3ErrorMsg(pParse, "no such collation sequence: %s", zName);
      }
................................................................................
** new entry.  Otherwise return NULL.
**
** A separate function sqlite3LocateCollSeq() is a wrapper around
** this routine.  sqlite3LocateCollSeq() invokes the collation factory
** if necessary and generates an error message if the collating sequence
** cannot be found.
*/
static CollSeq *sqlite3FindCollSeq(
  sqlite3 *db,
  u8 enc,
  const char *zName,
  int nName,
  int create
){
  CollSeq *pColl;
................................................................................
** function found is returned.  A function is valid if either xFunc
** or xStep is non-zero.
**
** If createFlag is false, then a function with the required name and
** number of arguments may be returned even if the eTextRep flag does not
** match that requested.
*/
static FuncDef *sqlite3FindFunction(
  sqlite3 *db,       /* An open database */
  const char *zName, /* Name of the function.  Not null-terminated */
  int nName,         /* Number of characters in the name */
  int nArg,          /* Number of arguments.  -1 means any number */
  u8 enc,            /* Preferred text encoding */
  int createFlag     /* Create new entry if true and does not otherwise exist */
){
................................................................................

/*
** Free all resources held by the schema structure. The void* argument points
** at a Schema struct. This function does not call sqliteFree() on the 
** pointer itself, it just cleans up subsiduary resources (i.e. the contents
** of the schema hash tables).
*/
static void sqlite3SchemaFree(void *p){
  Hash temp1;
  Hash temp2;
  HashElem *pElem;
  Schema *pSchema = (Schema *)p;

  temp1 = pSchema->tblHash;
  temp2 = pSchema->trigHash;
................................................................................
  pSchema->flags &= ~DB_SchemaLoaded;
}

/*
** Find and return the schema associated with a BTree.  Create
** a new one if necessary.
*/
static Schema *sqlite3SchemaGet(Btree *pBt){
  Schema * p;
  if( pBt ){
    p = (Schema *)sqlite3BtreeSchema(pBt,sizeof(Schema),sqlite3SchemaFree);
  }else{
    p = (Schema *)sqliteMalloc(sizeof(Schema));
  }
  if( p && 0==p->file_format ){
................................................................................
** An tokenizer for SQL
**
** This file contains C code that implements the sqlite3_complete() API.
** This code used to be part of the tokenizer.c source file.  But by
** separating it out, the code will be automatically omitted from
** static links that do not use it.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
#ifndef SQLITE_OMIT_COMPLETE

/*
** This is defined in tokenize.c.  We just have to import the definition.
*/
extern const char sqlite3IsIdChar[];
................................................................................
**
** Whitespace never causes a state transition and is always ignored.
**
** If we compile with SQLITE_OMIT_TRIGGER, all of the computation needed
** to recognize the end of a trigger can be omitted.  All we have to do
** is look for a semicolon that is not part of an string or comment.
*/
int sqlite3_complete(const char *zSql){
  u8 state = 0;   /* Current state, using numbers defined in header comment */
  u8 token;       /* Value of the next token */

#ifndef SQLITE_OMIT_TRIGGER
  /* A complex statement machine used to detect the end of a CREATE TRIGGER
  ** statement.  This is the normal case.
  */
................................................................................

#ifndef SQLITE_OMIT_UTF16
/*
** This routine is the same as the sqlite3_complete() routine described
** above, except that the parameter is required to be UTF-16 encoded, not
** UTF-8.
*/
int sqlite3_complete16(const void *zSql){
  sqlite3_value *pVal;
  char const *zSql8;
  int rc = 0;

  pVal = sqlite3ValueNew();
  sqlite3ValueSetStr(pVal, -1, zSql, SQLITE_UTF16NATIVE, SQLITE_STATIC);
  zSql8 = sqlite3ValueText(pVal, SQLITE_UTF8);
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** in order to generate code for DELETE FROM statements.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** Look up every table that is named in pSrc.  If any table is not found,
** add an error message to pParse->zErrMsg and return NULL.  If all tables
** are found, return a pointer to the last table.
*/
static Table *sqlite3SrcListLookup(Parse *pParse, SrcList *pSrc){
  Table *pTab = 0;
  int i;
  struct SrcList_item *pItem;
  for(i=0, pItem=pSrc->a; i<pSrc->nSrc; i++, pItem++){
    pTab = sqlite3LocateTable(pParse, pItem->zName, pItem->zDatabase);
    sqlite3DeleteTable(pItem->pTab);
    pItem->pTab = pTab;
................................................................................
}

/*
** Check to make sure the given table is writable.  If it is not
** writable, generate an error message and return 1.  If it is
** writable return 0;
*/
static int sqlite3IsReadOnly(Parse *pParse, Table *pTab, int viewOk){
  if( (pTab->readOnly && (pParse->db->flags & SQLITE_WriteSchema)==0
        && pParse->nested==0) 
#ifndef SQLITE_OMIT_VIRTUALTABLE
      || (pTab->pMod && pTab->pMod->pModule->xUpdate==0)
#endif
  ){
    sqlite3ErrorMsg(pParse, "table %s may not be modified", pTab->zName);
................................................................................
#endif
  return 0;
}

/*
** Generate code that will open a table for reading.
*/
static void sqlite3OpenTable(
  Parse *p,       /* Generate code into this VDBE */
  int iCur,       /* The cursor number of the table */
  int iDb,        /* The database index in sqlite3.aDb[] */
  Table *pTab,    /* The table to be opened */
  int opcode      /* OP_OpenRead or OP_OpenWrite */
){
  Vdbe *v;
................................................................................
/*
** Generate code for a DELETE FROM statement.
**
**     DELETE FROM table_wxyz WHERE a<5 AND b NOT NULL;
**                 \________/       \________________/
**                  pTabList              pWhere
*/
static void sqlite3DeleteFrom(
  Parse *pParse,         /* The parser context */
  SrcList *pTabList,     /* The table from which we should delete things */
  Expr *pWhere           /* The WHERE clause.  May be null */
){
  Vdbe *v;               /* The virtual database engine */
  Table *pTab;           /* The table from which records will be deleted */
  const char *zDb;       /* Name of database holding pTab */
................................................................................
**   3.  The record number of the row to be deleted must be on the top
**       of the stack.
**
** This routine pops the top of the stack to remove the record number
** and then generates code to remove both the table record and all index
** entries that point to that record.
*/
static void sqlite3GenerateRowDelete(
  sqlite3 *db,       /* The database containing the index */
  Vdbe *v,           /* Generate code into this VDBE */
  Table *pTab,       /* Table containing the row to be deleted */
  int iCur,          /* Cursor number for the table */
  int count          /* Increment the row change counter */
){
  int addr;
................................................................................
**
**   2.  Read/write cursors for all indices of pTab must be open as
**       cursor number iCur+i for the i-th index.
**
**   3.  The "iCur" cursor must be pointing to the row that is to be
**       deleted.
*/
static void sqlite3GenerateRowIndexDelete(
  Vdbe *v,           /* Generate code into this VDBE */
  Table *pTab,       /* Table containing the row to be deleted */
  int iCur,          /* Cursor number for the table */
  char *aIdxUsed     /* Only delete if aIdxUsed!=0 && aIdxUsed[i]!=0 */
){
  int i;
  Index *pIdx;
................................................................................

/*
** Generate code that will assemble an index key and put it on the top
** of the tack.  The key with be for index pIdx which is an index on pTab.
** iCur is the index of a cursor open on the pTab table and pointing to
** the entry that needs indexing.
*/
static void sqlite3GenerateIndexKey(
  Vdbe *v,           /* Generate code into this VDBE */
  Index *pIdx,       /* The index for which to generate a key */
  int iCur           /* Cursor number for the pIdx->pTable table */
){
  int j;
  Table *pTab = pIdx->pTable;

................................................................................
** This file contains the C functions that implement various SQL
** functions of SQLite.  
**
** There is only one exported symbol in this file - the function
** sqliteRegisterBuildinFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
/* #include <math.h> */

/*
** Return the collating function associated with a function.
*/
static CollSeq *sqlite3GetFuncCollSeq(sqlite3_context *context){
................................................................................
/* If SQLITE_CASE_SENSITIVE_LIKE is defined, then the LIKE operator
** is case sensitive causing 'a' LIKE 'A' to be false */
static const struct compareInfo likeInfoAlt = { '%', '_',   0, 0 };

/*
** Read a single UTF-8 character and return its value.
*/
static u32 sqlite3ReadUtf8(const unsigned char *z){
  u32 c;
  SQLITE_READ_UTF8(z, c);
  return c;
}

/*
** Compare two UTF-8 strings for equality where the first string can
................................................................................


/*
** This function registered all of the above C functions as SQL
** functions.  This should be the only routine in this file with
** external linkage.
*/
static void sqlite3RegisterBuiltinFunctions(sqlite3 *db){
  static const struct {
     char *zName;
     signed char nArg;
     u8 argType;           /* ff: db   1: 0, 2: 1, 3: 2,...  N:  N-1. */
     u8 eTextRep;          /* 1: UTF-16.  0: UTF-8 */
     u8 needCollSeq;
     void (*xFunc)(sqlite3_context*,int,sqlite3_value **);
................................................................................
          strlen(aAggs[i].zName), aAggs[i].nArg, SQLITE_UTF8, 0);
      if( pFunc && aAggs[i].needCollSeq ){
        pFunc->needCollSeq = 1;
      }
    }
  }
  sqlite3RegisterDateTimeFunctions(db);

  sqlite3_overload_function(db, "MATCH", 2);





#ifdef SQLITE_SSE
  (void)sqlite3SseFunctions(db);
#endif
#ifdef SQLITE_CASE_SENSITIVE_LIKE
  sqlite3RegisterLikeFunctions(db, 1);
#else
  sqlite3RegisterLikeFunctions(db, 0);
................................................................................
}

/*
** Register the built-in LIKE and GLOB functions.  The caseSensitive
** parameter determines whether or not the LIKE operator is case
** sensitive.  GLOB is always case sensitive.
*/
static void sqlite3RegisterLikeFunctions(sqlite3 *db, int caseSensitive){
  struct compareInfo *pInfo;
  if( caseSensitive ){
    pInfo = (struct compareInfo*)&likeInfoAlt;
  }else{
    pInfo = (struct compareInfo*)&likeInfoNorm;
  }
  sqlite3CreateFunc(db, "like", 2, SQLITE_UTF8, pInfo, likeFunc, 0, 0);
................................................................................
/*
** pExpr points to an expression which implements a function.  If
** it is appropriate to apply the LIKE optimization to that function
** then set aWc[0] through aWc[2] to the wildcard characters and
** return TRUE.  If the function is not a LIKE-style function then
** return FALSE.
*/
static int sqlite3IsLikeFunction(sqlite3 *db, Expr *pExpr, int *pIsNocase, char *aWc){
  FuncDef *pDef;
  if( pExpr->op!=TK_FUNCTION || !pExpr->pList ){
    return 0;
  }
  if( pExpr->pList->nExpr!=2 ){
    return 0;
  }
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle INSERT statements in SQLite.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** Set P3 of the most recently inserted opcode to a column affinity
** string for index pIdx. A column affinity string has one character
** for each column in the table, according to the affinity of the column:
**
................................................................................
**  ------------------------------
**  'a'            TEXT
**  'b'            NONE
**  'c'            NUMERIC
**  'd'            INTEGER
**  'e'            REAL
*/
static void sqlite3IndexAffinityStr(Vdbe *v, Index *pIdx){
  if( !pIdx->zColAff ){
    /* The first time a column affinity string for a particular index is
    ** required, it is allocated and populated here. It is then stored as
    ** a member of the Index structure for subsequent use.
    **
    ** The column affinity string will eventually be deleted by
    ** sqliteDeleteIndex() when the Index structure itself is cleaned
................................................................................
**  ------------------------------
**  'a'            TEXT
**  'b'            NONE
**  'c'            NUMERIC
**  'd'            INTEGER
**  'e'            REAL
*/
static void sqlite3TableAffinityStr(Vdbe *v, Table *pTab){
  /* The first time a column affinity string for a particular table
  ** is required, it is allocated and populated here. It is then 
  ** stored as a member of the Table structure for subsequent use.
  **
  ** The column affinity string will eventually be deleted by
  ** sqlite3DeleteTable() when the Table structure itself is cleaned up.
  */
................................................................................
**         goto A
**      D: open write cursor to <table> and its indices
**         loop over the intermediate table
**           transfer values form intermediate table into <table>
**         end the loop
**         cleanup
*/
static void sqlite3Insert(
  Parse *pParse,        /* Parser context */
  SrcList *pTabList,    /* Name of table into which we are inserting */
  ExprList *pList,      /* List of values to be inserted */
  Select *pSelect,      /* A SELECT statement to use as the data source */
  IdList *pColumn,      /* Column names corresponding to IDLIST. */
  int onError           /* How to handle constraint errors */
){
................................................................................
  int iInsertBlock = 0; /* Address of the subroutine used to insert data */
  int iCntMem = 0;      /* Memory cell used for the row counter */
  int newIdx = -1;      /* Cursor for the NEW table */
  Db *pDb;              /* The database containing table being inserted into */
  int counterMem = 0;   /* Memory cell holding AUTOINCREMENT counter */
  int appendFlag = 0;   /* True if the insert is likely to be an append */
  int iDb;



#ifndef SQLITE_OMIT_TRIGGER
  int isView;                 /* True if attempting to insert into a view */
  int triggers_exist = 0;     /* True if there are FOR EACH ROW triggers */
#endif

  if( pParse->nErr || sqlite3MallocFailed() ){
................................................................................
      }
    }
  }

  /* Make sure the number of columns in the source data matches the number
  ** of columns to be inserted into the table.
  */





  if( pColumn==0 && nColumn && nColumn!=pTab->nCol ){
    sqlite3ErrorMsg(pParse, 
       "table %S has %d columns but %d values were supplied",
       pTabList, 0, pTab->nCol, nColumn);
    goto insert_cleanup;
  }
  if( pColumn!=0 && nColumn!=pColumn->nId ){
    sqlite3ErrorMsg(pParse, "%d values for %d columns", nColumn, pColumn->nId);
................................................................................
      assert( pSelect==0 );  /* Otherwise useTempTable is true */
      sqlite3ExprCode(pParse, pList->a[keyColumn].pExpr);
      sqlite3VdbeAddOp(v, OP_NotNull, -1, sqlite3VdbeCurrentAddr(v)+3);
      sqlite3VdbeAddOp(v, OP_Pop, 1, 0);
      sqlite3VdbeAddOp(v, OP_Integer, -1, 0);
      sqlite3VdbeAddOp(v, OP_MustBeInt, 0, 0);
    }






    /* Create the new column data
    */
    for(i=0; i<pTab->nCol; i++){
      if( pColumn==0 ){
        j = i;
      }else{
................................................................................
      appendFlag = 1;
    }
    autoIncStep(pParse, counterMem);

    /* Push onto the stack, data for all columns of the new entry, beginning
    ** with the first column.
    */

    for(i=0; i<pTab->nCol; i++){
      if( i==pTab->iPKey ){
        /* The value of the INTEGER PRIMARY KEY column is always a NULL.
        ** Whenever this column is read, the record number will be substituted
        ** in its place.  So will fill this column with a NULL to avoid
        ** taking up data space with information that will never be used. */
        sqlite3VdbeAddOp(v, OP_Null, 0, 0);
        continue;
      }
      if( pColumn==0 ){


        j = i;




      }else{
        for(j=0; j<pColumn->nId; j++){
          if( pColumn->a[j].idx==i ) break;
        }
      }
      if( nColumn==0 || (pColumn && j>=pColumn->nId) ){
        sqlite3ExprCode(pParse, pTab->aCol[i].pDflt);
      }else if( useTempTable ){
        sqlite3VdbeAddOp(v, OP_Column, srcTab, j); 
      }else if( pSelect ){
        sqlite3VdbeAddOp(v, OP_Dup, i+nColumn-j+IsVirtual(pTab), 1);
      }else{
        sqlite3ExprCode(pParse, pList->a[j].pExpr);
................................................................................
**
** If the isUpdate flag is true, it means that the "base" cursor is
** initially pointing to an entry that is being updated.  The isUpdate
** flag causes extra code to be generated so that the "base" cursor
** is still pointing at the same entry after the routine returns.
** Without the isUpdate flag, the "base" cursor might be moved.
*/
static void sqlite3GenerateConstraintChecks(
  Parse *pParse,      /* The parser context */
  Table *pTab,        /* the table into which we are inserting */
  int base,           /* Index of a read/write cursor pointing at pTab */
  char *aIdxUsed,     /* Which indices are used.  NULL means all are used */
  int rowidChng,      /* True if the record number will change */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int overrideError,  /* Override onError to this if not OE_Default */
................................................................................
** The stack must contain keys for all active indices followed by data
** and the rowid for the new entry.  This routine creates the new
** entries in all indices and in the main table.
**
** The arguments to this routine should be the same as the first six
** arguments to sqlite3GenerateConstraintChecks.
*/
static void sqlite3CompleteInsertion(
  Parse *pParse,      /* The parser context */
  Table *pTab,        /* the table into which we are inserting */
  int base,           /* Index of a read/write cursor pointing at pTab */
  char *aIdxUsed,     /* Which indices are used.  NULL means all are used */
  int rowidChng,      /* True if the record number will change */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int newIdx,         /* Index of NEW table for triggers.  -1 if none */
................................................................................
}

/*
** Generate code that will open cursors for a table and for all
** indices of that table.  The "base" parameter is the cursor number used
** for the table.  Indices are opened on subsequent cursors.
*/
static void sqlite3OpenTableAndIndices(
  Parse *pParse,   /* Parsing context */
  Table *pTab,     /* Table to be opened */
  int base,        /* Cursor number assigned to the table */
  int op           /* OP_OpenRead or OP_OpenWrite */
){
  int i;
  int iDb;
................................................................................
**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/


/*
** Execute SQL code.  Return one of the SQLITE_ success/failure
** codes.  Also write an error message into memory obtained from
** malloc() and make *pzErrMsg point to that message.
**
** If the SQL is a query, then for each row in the query result
** the xCallback() function is called.  pArg becomes the first
** argument to xCallback().  If xCallback=NULL then no callback
** is invoked, even for queries.
*/
int sqlite3_exec(
  sqlite3 *db,                /* The database on which the SQL executes */
  const char *zSql,           /* The SQL to be executed */
  sqlite3_callback xCallback, /* Invoke this callback routine */
  void *pArg,                 /* First argument to xCallback() */
  char **pzErrMsg             /* Write error messages here */
){
  int rc = SQLITE_OK;
................................................................................
*************************************************************************
** This header file defines the SQLite interface for use by
** shared libraries that want to be imported as extensions into
** an SQLite instance.  Shared libraries that intend to be loaded
** as extensions by SQLite should #include this file instead of 
** sqlite3.h.
**
** @(#) $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
#ifndef _SQLITE3EXT_H_
#define _SQLITE3EXT_H_

typedef struct sqlite3_api_routines sqlite3_api_routines;

/*
** The following structure hold pointers to all of the SQLite API
** routines.






*/
struct sqlite3_api_routines {
  void * (*aggregate_context)(sqlite3_context*,int nBytes);
  int  (*aggregate_count)(sqlite3_context*);
  int  (*bind_blob)(sqlite3_stmt*,int,const void*,int n,void(*)(void*));
  int  (*bind_double)(sqlite3_stmt*,int,double);
  int  (*bind_int)(sqlite3_stmt*,int,int);
................................................................................
  const void * (*value_text16le)(sqlite3_value*);
  int  (*value_type)(sqlite3_value*);
  char *(*vmprintf)(const char*,va_list);
  int (*overload_function)(sqlite3*, const char *zFuncName, int nArg);
  int (*prepare_v2)(sqlite3*,const char*,int,sqlite3_stmt**,const char**);
  int (*prepare16_v2)(sqlite3*,const void*,int,sqlite3_stmt**,const void**);
  int (*clear_bindings)(sqlite3_stmt*);

};

/*
** The following macros redefine the API routines so that they are
** redirected throught the global sqlite3_api structure.
**
** This header file is also used by the loadext.c source file
................................................................................
#define sqlite3_complete               sqlite3_api->complete
#define sqlite3_complete16             sqlite3_api->complete16
#define sqlite3_create_collation       sqlite3_api->create_collation
#define sqlite3_create_collation16     sqlite3_api->create_collation16
#define sqlite3_create_function        sqlite3_api->create_function
#define sqlite3_create_function16      sqlite3_api->create_function16
#define sqlite3_create_module          sqlite3_api->create_module

#define sqlite3_data_count             sqlite3_api->data_count
#define sqlite3_db_handle              sqlite3_api->db_handle
#define sqlite3_declare_vtab           sqlite3_api->declare_vtab
#define sqlite3_enable_shared_cache    sqlite3_api->enable_shared_cache
#define sqlite3_errcode                sqlite3_api->errcode
#define sqlite3_errmsg                 sqlite3_api->errmsg
#define sqlite3_errmsg16               sqlite3_api->errmsg16
................................................................................

#ifdef SQLITE_OMIT_PROGRESS_CALLBACK
# define sqlite3_progress_handler 0
#endif

#ifdef SQLITE_OMIT_VIRTUALTABLE
# define sqlite3_create_module 0

# define sqlite3_declare_vtab 0
#endif

#ifdef SQLITE_OMIT_SHARED_CACHE
# define sqlite3_enable_shared_cache 0
#endif

................................................................................

  /*
  ** Added after 3.3.13
  */
  sqlite3_prepare_v2,
  sqlite3_prepare16_v2,
  sqlite3_clear_bindings,






};

/*
** Attempt to load an SQLite extension library contained in the file
** zFile.  The entry point is zProc.  zProc may be 0 in which case a
** default entry point name (sqlite3_extension_init) is used.  Use
** of the default name is recommended.
................................................................................
  return SQLITE_OK;
}

/*
** Call this routine when the database connection is closing in order
** to clean up loaded extensions
*/
static void sqlite3CloseExtensions(sqlite3 *db){
  int i;
  for(i=0; i<db->nExtension; i++){
    sqlite3OsDlclose(db->aExtension[i]);
  }
  sqliteFree(db->aExtension);
}

................................................................................
  nAutoExtension = 0;
  sqlite3OsLeaveMutex();
}

/*
** Load all automatic extensions.
*/
static int sqlite3AutoLoadExtensions(sqlite3 *db){
  int i;
  int go = 1;
  int rc = SQLITE_OK;
  int (*xInit)(sqlite3*,char**,const sqlite3_api_routines*);

  if( nAutoExtension==0 ){
    /* Common case: early out without every having to acquire a mutex */
................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the PRAGMA command.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/* Ignore this whole file if pragmas are disabled
*/
#if !defined(SQLITE_OMIT_PRAGMA) && !defined(SQLITE_OMIT_PARSER)

#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
................................................................................
** identifier, or a number.  If minusFlag is true, then the value is
** a number that was preceded by a minus sign.
**
** If the left side is "database.id" then pId1 is the database name
** and pId2 is the id.  If the left side is just "id" then pId1 is the
** id and pId2 is any empty string.
*/
static void sqlite3Pragma(
  Parse *pParse, 
  Token *pId1,        /* First part of [database.]id field */
  Token *pId2,        /* Second part of [database.]id field, or NULL */
  Token *pValue,      /* Token for <value>, or NULL */
  int minusFlag       /* True if a '-' sign preceded <value> */
){
  char *zLeft = 0;       /* Nul-terminated UTF-8 string <id> */
................................................................................
  **  PRAGMA [database.]auto_vacuum=N
  **
  ** Get or set the (boolean) value of the database 'auto-vacuum' parameter.
  */
#ifndef SQLITE_OMIT_AUTOVACUUM
  if( sqlite3StrICmp(zLeft,"auto_vacuum")==0 ){
    Btree *pBt = pDb->pBt;



    if( !zRight ){
      int auto_vacuum = 
          pBt ? sqlite3BtreeGetAutoVacuum(pBt) : SQLITE_DEFAULT_AUTOVACUUM;
      returnSingleInt(pParse, "auto_vacuum", auto_vacuum);
    }else{
      int eAuto = getAutoVacuum(zRight);
      if( eAuto>=0 ){





        sqlite3BtreeSetAutoVacuum(pBt, eAuto);






















      }
    }
  }else
#endif

  /*
  **  PRAGMA [database.]incremental_vacuum(N)
................................................................................
  */
  if( sqlite3StrICmp(zLeft, "table_info")==0 && zRight ){
    Table *pTab;
    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    pTab = sqlite3FindTable(db, zRight, zDb);
    if( pTab ){
      int i;

      Column *pCol;
      sqlite3VdbeSetNumCols(v, 6);
      sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "cid", P3_STATIC);
      sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "name", P3_STATIC);
      sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "type", P3_STATIC);
      sqlite3VdbeSetColName(v, 3, COLNAME_NAME, "notnull", P3_STATIC);
      sqlite3VdbeSetColName(v, 4, COLNAME_NAME, "dflt_value", P3_STATIC);
      sqlite3VdbeSetColName(v, 5, COLNAME_NAME, "pk", P3_STATIC);
      sqlite3ViewGetColumnNames(pParse, pTab);
      for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){
        const Token *pDflt;




        sqlite3VdbeAddOp(v, OP_Integer, i, 0);
        sqlite3VdbeOp3(v, OP_String8, 0, 0, pCol->zName, 0);
        sqlite3VdbeOp3(v, OP_String8, 0, 0,
           pCol->zType ? pCol->zType : "", 0);
        sqlite3VdbeAddOp(v, OP_Integer, pCol->notNull, 0);
        if( pCol->pDflt && (pDflt = &pCol->pDflt->span)->z ){
          sqlite3VdbeOp3(v, OP_String8, 0, 0, (char*)pDflt->z, pDflt->n);
        }else{
................................................................................
  ** Subverting this mechanism by using "PRAGMA schema_version" to modify
  ** the schema-version is potentially dangerous and may lead to program
  ** crashes or database corruption. Use with caution!
  **
  ** The user-version is not used internally by SQLite. It may be used by
  ** applications for any purpose.
  */
  if( sqlite3StrICmp(zLeft, "schema_version")==0 ||
      sqlite3StrICmp(zLeft, "user_version")==0 ){



    int iCookie;   /* Cookie index. 0 for schema-cookie, 6 for user-cookie. */
    if( zLeft[0]=='s' || zLeft[0]=='S' ){


      iCookie = 0;
    }else{







      iCookie = 5;

    }

    if( zRight ){
      /* Write the specified cookie value */
      static const VdbeOpList setCookie[] = {
        { OP_Transaction,    0,  1,  0},    /* 0 */
        { OP_Integer,        0,  0,  0},    /* 1 */
        { OP_SetCookie,      0,  0,  0},    /* 2 */
      };
      int addr = sqlite3VdbeAddOpList(v, ArraySize(setCookie), setCookie);
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains the implementation of the sqlite3_prepare()
** interface, and routines that contribute to loading the database schema
** from disk.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** Fill the InitData structure with an error message that indicates
** that the database is corrupt.
*/
static void corruptSchema(InitData *pData, const char *zExtra){
................................................................................
** Each callback contains the following information:
**
**     argv[0] = name of thing being created
**     argv[1] = root page number for table or index. 0 for trigger or view.
**     argv[2] = SQL text for the CREATE statement.
**
*/
static int sqlite3InitCallback(void *pInit, int argc, char **argv, char **azColName){
  InitData *pData = (InitData*)pInit;
  sqlite3 *db = pData->db;
  int iDb = pData->iDb;

  pData->rc = SQLITE_OK;
  DbClearProperty(db, iDb, DB_Empty);
  if( sqlite3MallocFailed() ){
................................................................................
  ** Meta values are as follows:
  **    meta[0]   Schema cookie.  Changes with each schema change.
  **    meta[1]   File format of schema layer.
  **    meta[2]   Size of the page cache.
  **    meta[3]   Use freelist if 0.  Autovacuum if greater than zero.
  **    meta[4]   Db text encoding. 1:UTF-8 2:UTF-16LE 3:UTF-16BE
  **    meta[5]   The user cookie. Used by the application.
  **    meta[6]   
  **    meta[7]
  **    meta[8]
  **    meta[9]
  **
  ** Note: The #defined SQLITE_UTF* symbols in sqliteInt.h correspond to
  ** the possible values of meta[4].
  */
................................................................................
** created using ATTACH statements.  Return a success code.  If an
** error occurs, write an error message into *pzErrMsg.
**
** After a database is initialized, the DB_SchemaLoaded bit is set
** bit is set in the flags field of the Db structure. If the database
** file was of zero-length, then the DB_Empty flag is also set.
*/
static int sqlite3Init(sqlite3 *db, char **pzErrMsg){
  int i, rc;
  int called_initone = 0;
  
  if( db->init.busy ) return SQLITE_OK;
  rc = SQLITE_OK;
  db->init.busy = 1;
  for(i=0; rc==SQLITE_OK && i<db->nDb; i++){
................................................................................
  return rc; 
}

/*
** This routine is a no-op if the database schema is already initialised.
** Otherwise, the schema is loaded. An error code is returned.
*/
static int sqlite3ReadSchema(Parse *pParse){
  int rc = SQLITE_OK;
  sqlite3 *db = pParse->db;
  if( !db->init.busy ){
    rc = sqlite3Init(db, &pParse->zErrMsg);
  }
  if( rc!=SQLITE_OK ){
    pParse->rc = rc;
................................................................................
/*
** Convert a schema pointer into the iDb index that indicates
** which database file in db->aDb[] the schema refers to.
**
** If the same database is attached more than once, the first
** attached database is returned.
*/
static int sqlite3SchemaToIndex(sqlite3 *db, Schema *pSchema){
  int i = -1000000;

  /* If pSchema is NULL, then return -1000000. This happens when code in 
  ** expr.c is trying to resolve a reference to a transient table (i.e. one
  ** created by a sub-select). In this case the return value of this 
  ** function should never be used.
  **
................................................................................
  }
  return i;
}

/*
** Compile the UTF-8 encoded SQL statement zSql into a statement handle.
*/
static int sqlite3Prepare(
  sqlite3 *db,              /* Database handle. */
  const char *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  int saveSqlFlag,          /* True to copy SQL text into the sqlite3_stmt */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const char **pzTail       /* OUT: End of parsed string */
){
................................................................................
}

/*
** Rerun the compilation of a statement after a schema change.
** Return true if the statement was recompiled successfully.
** Return false if there is an error of some kind.
*/
static int sqlite3Reprepare(Vdbe *p){
  int rc;
  sqlite3_stmt *pNew;
  const char *zSql;
  sqlite3 *db;
  
  zSql = sqlite3VdbeGetSql(p);
  if( zSql==0 ){
................................................................................
** Two versions of the official API.  Legacy and new use.  In the legacy
** version, the original SQL text is not saved in the prepared statement
** and so if a schema change occurs, SQLITE_SCHEMA is returned by
** sqlite3_step().  In the new version, the original SQL text is retained
** and the statement is automatically recompiled if an schema change
** occurs.
*/
int sqlite3_prepare(
  sqlite3 *db,              /* Database handle. */
  const char *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const char **pzTail       /* OUT: End of parsed string */
){
  return sqlite3Prepare(db,zSql,nBytes,0,ppStmt,pzTail);
................................................................................
** Two versions of the official API.  Legacy and new use.  In the legacy
** version, the original SQL text is not saved in the prepared statement
** and so if a schema change occurs, SQLITE_SCHEMA is returned by
** sqlite3_step().  In the new version, the original SQL text is retained
** and the statement is automatically recompiled if an schema change
** occurs.
*/
int sqlite3_prepare16(
  sqlite3 *db,              /* Database handle. */ 
  const void *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const void **pzTail       /* OUT: End of parsed string */
){
  return sqlite3Prepare16(db,zSql,nBytes,0,ppStmt,pzTail);
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/


/*
** Delete all the content of a Select structure but do not deallocate
** the select structure itself.
*/
................................................................................
}


/*
** Allocate a new Select structure and return a pointer to that
** structure.
*/
static Select *sqlite3SelectNew(
  ExprList *pEList,     /* which columns to include in the result */
  SrcList *pSrc,        /* the FROM clause -- which tables to scan */
  Expr *pWhere,         /* the WHERE clause */
  ExprList *pGroupBy,   /* the GROUP BY clause */
  Expr *pHaving,        /* the HAVING clause */
  ExprList *pOrderBy,   /* the ORDER BY clause */
  int isDistinct,       /* true if the DISTINCT keyword is present */
................................................................................
  }
  return pNew;
}

/*
** Delete the given Select structure and all of its substructures.
*/
static void sqlite3SelectDelete(Select *p){
  if( p ){
    clearSelect(p);
    sqliteFree(p);
  }
}

/*
................................................................................
**     JT_RIGHT
**
** A full outer join is the combination of JT_LEFT and JT_RIGHT.
**
** If an illegal or unsupported join type is seen, then still return
** a join type, but put an error in the pParse structure.
*/
static int sqlite3JoinType(Parse *pParse, Token *pA, Token *pB, Token *pC){
  int jointype = 0;
  Token *apAll[3];
  Token *p;
  static const struct {
    const char zKeyword[8];
    u8 nChar;
    u8 code;
................................................................................
** Set the value of a token to a '\000'-terminated string.
*/
static void setToken(Token *p, const char *z){
  p->z = (u8*)z;
  p->n = z ? strlen(z) : 0;
  p->dyn = 0;
}















/*
** Create an expression node for an identifier with the name of zName
*/
static Expr *sqlite3CreateIdExpr(const char *zName){
  Token dummy;
  setToken(&dummy, zName);
  return sqlite3Expr(TK_ID, 0, 0, &dummy);
}


/*
................................................................................
*/
static int prepSelectStmt(Parse*, Select*);

/*
** Given a SELECT statement, generate a Table structure that describes
** the result set of that SELECT.
*/
static Table *sqlite3ResultSetOfSelect(Parse *pParse, char *zTabName, Select *pSelect){
  Table *pTab;
  int i, j;
  ExprList *pEList;
  Column *aCol, *pCol;

  while( pSelect->pPrior ) pSelect = pSelect->pPrior;
  if( prepSelectStmt(pParse, pSelect) ){
................................................................................
                 sqlite3StrICmp(zTName, zTabName)!=0) ){
            continue;
          }
          tableSeen = 1;
          for(j=0; j<pTab->nCol; j++){
            Expr *pExpr, *pRight;
            char *zName = pTab->aCol[j].zName;










            if( i>0 ){
              struct SrcList_item *pLeft = &pTabList->a[i-1];
              if( (pLeft[1].jointype & JT_NATURAL)!=0 &&
                        columnIndex(pLeft->pTab, zName)>=0 ){
                /* In a NATURAL join, omit the join columns from the 
                ** table on the right */
................................................................................
                /* In a join with a USING clause, omit columns in the
                ** using clause from the table on the right. */
                continue;
              }
            }
            pRight = sqlite3Expr(TK_ID, 0, 0, 0);
            if( pRight==0 ) break;
            setToken(&pRight->token, zName);
            if( zTabName && (longNames || pTabList->nSrc>1) ){
              Expr *pLeft = sqlite3Expr(TK_ID, 0, 0, 0);
              pExpr = sqlite3Expr(TK_DOT, pLeft, pRight, 0);
              if( pExpr==0 ) break;
              setToken(&pLeft->token, zTabName);
              setToken(&pExpr->span, sqlite3MPrintf("%s.%s", zTabName, zName));
              pExpr->span.dyn = 1;
              pExpr->token.z = 0;
              pExpr->token.n = 0;
              pExpr->token.dyn = 0;
            }else{
              pExpr = pRight;
              pExpr->span = pExpr->token;

            }
            if( longNames ){
              pNew = sqlite3ExprListAppend(pNew, pExpr, &pExpr->span);
            }else{
              pNew = sqlite3ExprListAppend(pNew, pExpr, &pRight->token);
            }
          }
................................................................................
    }
    sqlite3ExprListDelete(pEList);
    p->pEList = pNew;
  }
  if( p->pEList && p->pEList->nExpr>SQLITE_MAX_COLUMN ){
    sqlite3ErrorMsg(pParse, "too many columns in result set");
    rc = SQLITE_ERROR;



  }
  return rc;
}

#ifndef SQLITE_OMIT_COMPOUND_SELECT
/*
** This routine associates entries in an ORDER BY expression list with
................................................................................
}
#endif /* #ifndef SQLITE_OMIT_COMPOUND_SELECT */

/*
** Get a VDBE for the given parser context.  Create a new one if necessary.
** If an error occurs, return NULL and leave a message in pParse.
*/
static Vdbe *sqlite3GetVdbe(Parse *pParse){
  Vdbe *v = pParse->pVdbe;
  if( v==0 ){
    v = pParse->pVdbe = sqlite3VdbeCreate(pParse->db);
  }
  return v;
}

................................................................................
    sqlite3VdbeAddOp(v, OP_Integer, iDb, 0);
    sqlite3VdbeOp3(v, OP_OpenRead, iIdx, pIdx->tnum, 
        (char*)pKey, P3_KEYINFO_HANDOFF);
    if( seekOp==OP_Rewind ){
      sqlite3VdbeAddOp(v, OP_Null, 0, 0);
      sqlite3VdbeAddOp(v, OP_MakeRecord, 1, 0);
      seekOp = OP_MoveGt;










    }
    sqlite3VdbeAddOp(v, seekOp, iIdx, 0);
    sqlite3VdbeAddOp(v, OP_IdxRowid, iIdx, 0);
    sqlite3VdbeAddOp(v, OP_Close, iIdx, 0);
    sqlite3VdbeAddOp(v, OP_MoveGe, base, 0);
  }
  eList.nExpr = 1;
................................................................................

/*
** This routine resolves any names used in the result set of the
** supplied SELECT statement. If the SELECT statement being resolved
** is a sub-select, then pOuterNC is a pointer to the NameContext 
** of the parent SELECT.
*/
static int sqlite3SelectResolve(
  Parse *pParse,         /* The parser context */
  Select *p,             /* The SELECT statement being coded. */
  NameContext *pOuterNC  /* The outer name context. May be NULL. */
){
  ExprList *pEList;          /* Result set. */
  int i;                     /* For-loop variable used in multiple places */
  NameContext sNC;           /* Local name-context */
................................................................................
** This routine is called for the outer query first.   For that call,
** pParent will be NULL.  During the processing of the outer query, this 
** routine is called recursively to handle the subquery.  For the recursive
** call, pParent will point to the outer query.  Because the subquery is
** the second element in a three-way join, the parentTab parameter will
** be 1 (the 2nd value of a 0-indexed array.)
*/
static int sqlite3Select(
  Parse *pParse,         /* The parser context */
  Select *p,             /* The SELECT statement being coded. */
  int eDest,             /* How to dispose of the results */
  int iParm,             /* A parameter used by the eDest disposal method */
  Select *pParent,       /* Another SELECT for which this is a sub-query */
  int parentTab,         /* Index in pParent->pSrc of this query */
  int *pParentAgg,       /* True if pParent uses aggregate functions */
................................................................................
** for helping to understand what is happening inside the code generator
** during the execution of complex SELECT statements.
**
** These routine are not called anywhere from within the normal
** code base.  Then are intended to be called from within the debugger
** or from temporary "printf" statements inserted for debugging.
*/
static void sqlite3PrintExpr(Expr *p){
  if( p->token.z && p->token.n>0 ){
    sqlite3DebugPrintf("(%.*s", p->token.n, p->token.z);
  }else{
    sqlite3DebugPrintf("(%d", p->op);
  }
  if( p->pLeft ){
    sqlite3DebugPrintf(" ");
................................................................................
  }
  if( p->pRight ){
    sqlite3DebugPrintf(" ");
    sqlite3PrintExpr(p->pRight);
  }
  sqlite3DebugPrintf(")");
}
static void sqlite3PrintExprList(ExprList *pList){
  int i;
  for(i=0; i<pList->nExpr; i++){
    sqlite3PrintExpr(pList->a[i].pExpr);
    if( i<pList->nExpr-1 ){
      sqlite3DebugPrintf(", ");
    }
  }
}
static void sqlite3PrintSelect(Select *p, int indent){
  sqlite3DebugPrintf("%*sSELECT(%p) ", indent, "", p);
  sqlite3PrintExprList(p->pEList);
  sqlite3DebugPrintf("\n");
  if( p->pSrc ){
    char *zPrefix;
    int i;
    zPrefix = "FROM";
................................................................................
*
*/

#ifndef SQLITE_OMIT_TRIGGER
/*
** Delete a linked list of TriggerStep structures.
*/
static void sqlite3DeleteTriggerStep(TriggerStep *pTriggerStep){
  while( pTriggerStep ){
    TriggerStep * pTmp = pTriggerStep;
    pTriggerStep = pTriggerStep->pNext;

    if( pTmp->target.dyn ) sqliteFree((char*)pTmp->target.z);
    sqlite3ExprDelete(pTmp->pWhere);
    sqlite3ExprListDelete(pTmp->pExprList);
................................................................................
** This is called by the parser when it sees a CREATE TRIGGER statement
** up to the point of the BEGIN before the trigger actions.  A Trigger
** structure is generated based on the information available and stored
** in pParse->pNewTrigger.  After the trigger actions have been parsed, the
** sqlite3FinishTrigger() function is called to complete the trigger
** construction process.
*/
static void sqlite3BeginTrigger(
  Parse *pParse,      /* The parse context of the CREATE TRIGGER statement */
  Token *pName1,      /* The name of the trigger */
  Token *pName2,      /* The name of the trigger */
  int tr_tm,          /* One of TK_BEFORE, TK_AFTER, TK_INSTEAD */
  int op,             /* One of TK_INSERT, TK_UPDATE, TK_DELETE */
  IdList *pColumns,   /* column list if this is an UPDATE OF trigger */
  SrcList *pTableName,/* The name of the table/view the trigger applies to */
................................................................................
  }
}

/*
** This routine is called after all of the trigger actions have been parsed
** in order to complete the process of building the trigger.
*/
static void sqlite3FinishTrigger(
  Parse *pParse,          /* Parser context */
  TriggerStep *pStepList, /* The triggered program */
  Token *pAll             /* Token that describes the complete CREATE TRIGGER */
){
  Trigger *pTrig = 0;     /* The trigger whose construction is finishing up */
  sqlite3 *db = pParse->db;  /* The database */
  DbFixer sFix;
................................................................................
/*
** Turn a SELECT statement (that the pSelect parameter points to) into
** a trigger step.  Return a pointer to a TriggerStep structure.
**
** The parser calls this routine when it finds a SELECT statement in
** body of a TRIGGER.  
*/
static TriggerStep *sqlite3TriggerSelectStep(Select *pSelect){
  TriggerStep *pTriggerStep = sqliteMalloc(sizeof(TriggerStep));
  if( pTriggerStep==0 ) {
    sqlite3SelectDelete(pSelect);
    return 0;
  }

  pTriggerStep->op = TK_SELECT;
................................................................................
/*
** Build a trigger step out of an INSERT statement.  Return a pointer
** to the new trigger step.
**
** The parser calls this routine when it sees an INSERT inside the
** body of a trigger.
*/
static TriggerStep *sqlite3TriggerInsertStep(
  Token *pTableName,  /* Name of the table into which we insert */
  IdList *pColumn,    /* List of columns in pTableName to insert into */
  ExprList *pEList,   /* The VALUE clause: a list of values to be inserted */
  Select *pSelect,    /* A SELECT statement that supplies values */
  int orconf          /* The conflict algorithm (OE_Abort, OE_Replace, etc.) */
){
  TriggerStep *pTriggerStep = sqliteMalloc(sizeof(TriggerStep));
................................................................................
}

/*
** Construct a trigger step that implements an UPDATE statement and return
** a pointer to that trigger step.  The parser calls this routine when it
** sees an UPDATE statement inside the body of a CREATE TRIGGER.
*/
static TriggerStep *sqlite3TriggerUpdateStep(
  Token *pTableName,   /* Name of the table to be updated */
  ExprList *pEList,    /* The SET clause: list of column and new values */
  Expr *pWhere,        /* The WHERE clause */
  int orconf           /* The conflict algorithm. (OE_Abort, OE_Ignore, etc) */
){
  TriggerStep *pTriggerStep = sqliteMalloc(sizeof(TriggerStep));
  if( pTriggerStep==0 ){
................................................................................
}

/*
** Construct a trigger step that implements a DELETE statement and return
** a pointer to that trigger step.  The parser calls this routine when it
** sees a DELETE statement inside the body of a CREATE TRIGGER.
*/
static TriggerStep *sqlite3TriggerDeleteStep(Token *pTableName, Expr *pWhere){
  TriggerStep *pTriggerStep = sqliteMalloc(sizeof(TriggerStep));
  if( pTriggerStep==0 ){
    sqlite3ExprDelete(pWhere);
    return 0;
  }

  pTriggerStep->op = TK_DELETE;
................................................................................

  return pTriggerStep;
}

/* 
** Recursively delete a Trigger structure
*/
static void sqlite3DeleteTrigger(Trigger *pTrigger){
  if( pTrigger==0 ) return;
  sqlite3DeleteTriggerStep(pTrigger->step_list);
  sqliteFree(pTrigger->name);
  sqliteFree(pTrigger->table);
  sqlite3ExprDelete(pTrigger->pWhen);
  sqlite3IdListDelete(pTrigger->pColumns);
  if( pTrigger->nameToken.dyn ) sqliteFree((char*)pTrigger->nameToken.z);
................................................................................
** This function is called to drop a trigger from the database schema. 
**
** This may be called directly from the parser and therefore identifies
** the trigger by name.  The sqlite3DropTriggerPtr() routine does the
** same job as this routine except it takes a pointer to the trigger
** instead of the trigger name.
**/
static void sqlite3DropTrigger(Parse *pParse, SrcList *pName, int noErr){
  Trigger *pTrigger = 0;
  int i;
  const char *zDb;
  const char *zName;
  int nName;
  sqlite3 *db = pParse->db;

................................................................................
  return sqlite3HashFind(&pTrigger->pTabSchema->tblHash, pTrigger->table, n);
}


/*
** Drop a trigger given a pointer to that trigger. 
*/
static void sqlite3DropTriggerPtr(Parse *pParse, Trigger *pTrigger){
  Table   *pTable;
  Vdbe *v;
  sqlite3 *db = pParse->db;
  int iDb;

  iDb = sqlite3SchemaToIndex(pParse->db, pTrigger->pSchema);
  assert( iDb>=0 && iDb<db->nDb );
................................................................................
    sqlite3VdbeOp3(v, OP_DropTrigger, iDb, 0, pTrigger->name, 0);
  }
}

/*
** Remove a trigger from the hash tables of the sqlite* pointer.
*/
static void sqlite3UnlinkAndDeleteTrigger(sqlite3 *db, int iDb, const char *zName){
  Trigger *pTrigger;
  int nName = strlen(zName);
  pTrigger = sqlite3HashInsert(&(db->aDb[iDb].pSchema->trigHash),
                               zName, nName, 0);
  if( pTrigger ){
    Table *pTable = tableOfTrigger(pTrigger);
    assert( pTable!=0 );
................................................................................
** "op" on table pTab.  If pChanges is not NULL then it is a list of columns
** that are being updated.  Triggers only match if the ON clause of the
** trigger definition overlaps the set of columns being updated.
**
** The returned bit vector is some combination of TRIGGER_BEFORE and
** TRIGGER_AFTER.
*/
static int sqlite3TriggersExist(
  Parse *pParse,          /* Used to check for recursive triggers */
  Table *pTab,            /* The table the contains the triggers */
  int op,                 /* one of TK_DELETE, TK_INSERT, TK_UPDATE */
  ExprList *pChanges      /* Columns that change in an UPDATE statement */
){
  Trigger *pTrigger;
  int mask = 0;
................................................................................
**
** 3. If the triggers being coded are ON DELETE or ON UPDATE triggers, then
**    a temporary vdbe cursor (index oldIdx) must be open and pointing at
**    a row containing values to be substituted for old.* expressions in the
**    trigger program(s).
**
*/
static int sqlite3CodeRowTrigger(
  Parse *pParse,       /* Parse context */
  int op,              /* One of TK_UPDATE, TK_INSERT, TK_DELETE */
  ExprList *pChanges,  /* Changes list for any UPDATE OF triggers */
  int tr_tm,           /* One of TRIGGER_BEFORE, TRIGGER_AFTER */
  Table *pTab,         /* The table to code triggers from */
  int newIdx,          /* The indice of the "new" row to access */
  int oldIdx,          /* The indice of the "old" row to access */
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle UPDATE statements.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Forward declaration */
static void updateVirtualTable(
  Parse *pParse,       /* The parsing context */
  SrcList *pSrc,       /* The virtual table to be modified */
................................................................................
** into the sqlite_master table.)
**
** Therefore, the P3 parameter is only required if the default value for
** the column is a literal number, string or null. The sqlite3ValueFromExpr()
** function is capable of transforming these types of expressions into
** sqlite3_value objects.
*/
static void sqlite3ColumnDefault(Vdbe *v, Table *pTab, int i){
  if( pTab && !pTab->pSelect ){
    sqlite3_value *pValue;
    u8 enc = ENC(sqlite3VdbeDb(v));
    Column *pCol = &pTab->aCol[i];

    sqlite3ValueFromExpr(pCol->pDflt, enc, pCol->affinity, &pValue);
    if( pValue ){
      sqlite3VdbeChangeP3(v, -1, (const char *)pValue, P3_MEM);
    }else{
      VdbeComment((v, "# %s.%s", pTab->zName, pCol->zName));
    }
  }
................................................................................
/*
** Process an UPDATE statement.
**
**   UPDATE OR IGNORE table_wxyz SET a=b, c=d WHERE e<5 AND f NOT NULL;
**          \_______/ \________/     \______/       \________________/
*            onError   pTabList      pChanges             pWhere
*/
static void sqlite3Update(
  Parse *pParse,         /* The parser context */
  SrcList *pTabList,     /* The table in which we should change things */
  ExprList *pChanges,    /* Things to be changed */
  Expr *pWhere,          /* The WHERE clause.  May be null */
  int onError            /* How to handle constraint errors */
){
  int i, j;              /* Loop counters */
................................................................................
**
*************************************************************************
** This file contains code used to implement the VACUUM command.
**
** Most of the code in this file may be omitted by defining the
** SQLITE_OMIT_VACUUM macro.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

#if !defined(SQLITE_OMIT_VACUUM) && !defined(SQLITE_OMIT_ATTACH)
/*
** Execute zSql on database db. Return an error code.
*/
static int execSql(sqlite3 *db, const char *zSql){
................................................................................
** in PostgreSQL.
**
** In version 1.0.x of SQLite, the VACUUM command would call
** gdbm_reorganize() on all the database tables.  But beginning
** with 2.0.0, SQLite no longer uses GDBM so this command has
** become a no-op.
*/
static void sqlite3Vacuum(Parse *pParse){
  Vdbe *v = sqlite3GetVdbe(pParse);
  if( v ){
    sqlite3VdbeAddOp(v, OP_Vacuum, 0, 0);
  }
  return;
}

/*
** This routine implements the OP_Vacuum opcode of the VDBE.
*/
static int sqlite3RunVacuum(char **pzErrMsg, sqlite3 *db){
  int rc = SQLITE_OK;     /* Return code from service routines */
  Btree *pMain;           /* The database being vacuumed */
  Btree *pTemp;           /* The temporary database we vacuum into */
  char *zSql = 0;         /* SQL statements */
  int saved_flags;        /* Saved value of the db->flags */
  Db *pDb = 0;            /* Database to detach at end of vacuum */

................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to help implement virtual tables.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE




























/*
** External API function used to create a new virtual-table module.
*/
int sqlite3_create_module(
  sqlite3 *db,                    /* Database in which module is registered */
  const char *zName,              /* Name assigned to this module */
  const sqlite3_module *pModule,  /* The definition of the module */
  void *pAux                      /* Context pointer for xCreate/xConnect */
){
  int nName = strlen(zName);
  Module *pMod = (Module *)sqliteMallocRaw(sizeof(Module) + nName + 1);
  if( pMod ){
    char *zCopy = (char *)(&pMod[1]);
    memcpy(zCopy, zName, nName+1);
    pMod->zName = zCopy;
    pMod->pModule = pModule;
    pMod->pAux = pAux;
    pMod = (Module *)sqlite3HashInsert(&db->aModule, zCopy, nName, (void*)pMod);
    sqliteFree(pMod);
    sqlite3ResetInternalSchema(db, 0);
  }
  return sqlite3ApiExit(db, SQLITE_OK);

}

/*
** Lock the virtual table so that it cannot be disconnected.
** Locks nest.  Every lock should have a corresponding unlock.
** If an unlock is omitted, resources leaks will occur.  
**
** If a disconnect is attempted while a virtual table is locked,
** the disconnect is deferred until all locks have been removed.
*/
static void sqlite3VtabLock(sqlite3_vtab *pVtab){
  pVtab->nRef++;
}

/*
** Unlock a virtual table.  When the last lock is removed,
** disconnect the virtual table.
*/
static void sqlite3VtabUnlock(sqlite3 *db, sqlite3_vtab *pVtab){
  pVtab->nRef--;
  assert(db);
  assert(!sqlite3SafetyCheck(db));
  if( pVtab->nRef==0 ){
    if( db->magic==SQLITE_MAGIC_BUSY ){
      sqlite3SafetyOff(db);
      pVtab->pModule->xDisconnect(pVtab);
................................................................................
}

/*
** Clear any and all virtual-table information from the Table record.
** This routine is called, for example, just before deleting the Table
** record.
*/
static void sqlite3VtabClear(Table *p){
  sqlite3_vtab *pVtab = p->pVtab;
  if( pVtab ){
    assert( p->pMod && p->pMod->pModule );
    sqlite3VtabUnlock(p->pSchema->db, pVtab);
    p->pVtab = 0;
  }
  if( p->azModuleArg ){
................................................................................
}

/*
** The parser calls this routine when it first sees a CREATE VIRTUAL TABLE
** statement.  The module name has been parsed, but the optional list
** of parameters that follow the module name are still pending.
*/
static void sqlite3VtabBeginParse(
  Parse *pParse,        /* Parsing context */
  Token *pName1,        /* Name of new table, or database name */
  Token *pName2,        /* Name of new table or NULL */
  Token *pModuleName    /* Name of the module for the virtual table */
){
  int iDb;              /* The database the table is being created in */
  Table *pTable;        /* The new virtual table */
................................................................................
  }
}

/*
** The parser calls this routine after the CREATE VIRTUAL TABLE statement
** has been completely parsed.
*/
static void sqlite3VtabFinishParse(Parse *pParse, Token *pEnd){
  Table *pTab;        /* The table being constructed */
  sqlite3 *db;        /* The database connection */
  char *zModule;      /* The module name of the table: USING modulename */
  Module *pMod = 0;

  addArgumentToVtab(pParse);
  pParse->sArg.z = 0;
................................................................................
  }
}

/*
** The parser calls this routine when it sees the first token
** of an argument to the module name in a CREATE VIRTUAL TABLE statement.
*/
static void sqlite3VtabArgInit(Parse *pParse){
  addArgumentToVtab(pParse);
  pParse->sArg.z = 0;
  pParse->sArg.n = 0;
}

/*
** The parser calls this routine for each token after the first token
** in an argument to the module name in a CREATE VIRTUAL TABLE statement.
*/
static void sqlite3VtabArgExtend(Parse *pParse, Token *p){
  Token *pArg = &pParse->sArg;
  if( pArg->z==0 ){
    pArg->z = p->z;
    pArg->n = p->n;
  }else{
    assert(pArg->z < p->z);
    pArg->n = (p->z + p->n - pArg->z);
................................................................................
    rc = SQLITE_ERROR;
  } 
  if( rc==SQLITE_OK ){
    rc = rc2;
  }
  db->pVTab = 0;
  sqliteFree(zModuleName);






































  return rc;
}

/*
** This function is invoked by the parser to call the xConnect() method
** of the virtual table pTab. If an error occurs, an error code is returned 
** and an error left in pParse.
**
** This call is a no-op if table pTab is not a virtual table.
*/
static int sqlite3VtabCallConnect(Parse *pParse, Table *pTab){
  Module *pMod;
  int rc = SQLITE_OK;

  if( !pTab || !pTab->isVirtual || pTab->pVtab ){
    return SQLITE_OK;
  }

................................................................................
** This function is invoked by the vdbe to call the xCreate method
** of the virtual table named zTab in database iDb. 
**
** If an error occurs, *pzErr is set to point an an English language
** description of the error and an SQLITE_XXX error code is returned.
** In this case the caller must call sqliteFree() on *pzErr.
*/
static int sqlite3VtabCallCreate(sqlite3 *db, int iDb, const char *zTab, char **pzErr){
  int rc = SQLITE_OK;
  Table *pTab;
  Module *pMod;
  const char *zModule;

  pTab = sqlite3FindTable(db, zTab, db->aDb[iDb].zName);
  assert(pTab && pTab->isVirtual && !pTab->pVtab);
................................................................................
/*
** This function is invoked by the vdbe to call the xDestroy method
** of the virtual table named zTab in database iDb. This occurs
** when a DROP TABLE is mentioned.
**
** This call is a no-op if zTab is not a virtual table.
*/
static int sqlite3VtabCallDestroy(sqlite3 *db, int iDb, const char *zTab)
{
  int rc = SQLITE_OK;
  Table *pTab;

  pTab = sqlite3FindTable(db, zTab, db->aDb[iDb].zName);
  assert(pTab);
  if( pTab->pVtab ){
................................................................................

/*
** If argument rc2 is not SQLITE_OK, then return it and do nothing. 
** Otherwise, invoke the xSync method of all virtual tables in the 
** sqlite3.aVTrans array. Return the error code for the first error 
** that occurs, or SQLITE_OK if all xSync operations are successful.
*/
static int sqlite3VtabSync(sqlite3 *db, int rc2){
  int i;
  int rc = SQLITE_OK;
  int rcsafety;
  sqlite3_vtab **aVTrans = db->aVTrans;
  if( rc2!=SQLITE_OK ) return rc2;

  rc = sqlite3SafetyOff(db);
................................................................................
  return rc;
}

/*
** Invoke the xRollback method of all virtual tables in the 
** sqlite3.aVTrans array. Then clear the array itself.
*/
static int sqlite3VtabRollback(sqlite3 *db){
  callFinaliser(db, (int)(&((sqlite3_module *)0)->xRollback));
  return SQLITE_OK;
}

/*
** Invoke the xCommit method of all virtual tables in the 
** sqlite3.aVTrans array. Then clear the array itself.
*/
static int sqlite3VtabCommit(sqlite3 *db){
  callFinaliser(db, (int)(&((sqlite3_module *)0)->xCommit));
  return SQLITE_OK;
}

/*
** If the virtual table pVtab supports the transaction interface
** (xBegin/xRollback/xCommit and optionally xSync) and a transaction is
** not currently open, invoke the xBegin method now.
**
** If the xBegin call is successful, place the sqlite3_vtab pointer
** in the sqlite3.aVTrans array.
*/
static int sqlite3VtabBegin(sqlite3 *db, sqlite3_vtab *pVtab){
  int rc = SQLITE_OK;
  const sqlite3_module *pModule;

  /* Special case: If db->aVTrans is NULL and db->nVTrans is greater
  ** than zero, then this function is being called from within a
  ** virtual module xSync() callback. It is illegal to write to 
  ** virtual module tables in this case, so return SQLITE_LOCKED.
................................................................................
** This routine is used to allow virtual table implementations to
** overload MATCH, LIKE, GLOB, and REGEXP operators.
**
** Return either the pDef argument (indicating no change) or a 
** new FuncDef structure that is marked as ephemeral using the
** SQLITE_FUNC_EPHEM flag.
*/
static FuncDef *sqlite3VtabOverloadFunction(
  FuncDef *pDef,  /* Function to possibly overload */
  int nArg,       /* Number of arguments to the function */
  Expr *pExpr     /* First argument to the function */
){
  Table *pTab;
  sqlite3_vtab *pVtab;
  sqlite3_module *pMod;
................................................................................
** This module contains C code that generates VDBE code used to process
** the WHERE clause of SQL statements.  This module is reponsible for
** generating the code that loops through a table looking for applicable
** rows.  Indices are selected and used to speed the search when doing
** so is applicable.  Because this module is responsible for selecting
** indices, you might also think of this module as the "query optimizer".
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** The number of bits in a Bitmask.  "BMS" means "BitMask Size".
*/
#define BMS  (sizeof(Bitmask)*8)

................................................................................
** *ppOrderBy is set to NULL.  This is an optimization that prevents an
** unnecessary sort of the result set if an index appropriate for the
** ORDER BY clause already exists.
**
** If the where clause loops cannot be arranged to provide the correct
** output order, then the *ppOrderBy is unchanged.
*/
static WhereInfo *sqlite3WhereBegin(
  Parse *pParse,        /* The parser context */
  SrcList *pTabList,    /* A list of all tables to be scanned */
  Expr *pWhere,         /* The WHERE clause */
  ExprList **ppOrderBy  /* An ORDER BY clause, or NULL */
){
  int i;                     /* Loop counter */
  WhereInfo *pWInfo;         /* Will become the return value of this function */
................................................................................
  return 0;
}

/*
** Generate the end of the WHERE loop.  See comments on 
** sqlite3WhereBegin() for additional information.
*/
static void sqlite3WhereEnd(WhereInfo *pWInfo){
  Vdbe *v = pWInfo->pParse->pVdbe;
  int i;
  WhereLevel *pLevel;
  SrcList *pTabList = pWInfo->pTabList;

  /* Generate loop termination code.
  */
................................................................................
**  yy_shift_ofst[]    For each state, the offset into yy_action for
**                     shifting terminals.
**  yy_reduce_ofst[]   For each state, the offset into yy_action for
**                     shifting non-terminals after a reduce.
**  yy_default[]       Default action for each state.
*/
static const YYACTIONTYPE yy_action[] = {
 /*     0 */   289,  898,  121,  585,  405,  169,    2,  435,   61,   61,
 /*    10 */    61,   61,  517,   63,   63,   63,   63,   64,   64,   65,
 /*    20 */    65,   65,   66,  230,  387,  384,  420,  426,   68,   63,
 /*    30 */    63,   63,   63,   64,   64,   65,   65,   65,   66,  230,
 /*    40 */   443,  208,  392,  447,   60,   59,  294,  430,  431,  427,
 /*    50 */   427,   62,   62,   61,   61,   61,   61,  205,   63,   63,
 /*    60 */    63,   63,   64,   64,   65,   65,   65,   66,  230,  289,
 /*    70 */   368,  316,  435,  487,  205,   80,   67,  415,   69,  151,
 /*    80 */    63,   63,   63,   63,   64,   64,   65,   65,   65,   66,
 /*    90 */   230,  515,  162,  410,   35,  420,  426,  443,  571,   58,
 /*   100 */    64,   64,   65,   65,   65,   66,  230,  393,  394,  417,
 /*   110 */   417,  417,  289,   60,   59,  294,  430,  431,  427,  427,
 /*   120 */    62,   62,   61,   61,   61,   61,  302,   63,   63,   63,
 /*   130 */    63,   64,   64,   65,   65,   65,   66,  230,  420,  426,
 /*   140 */    92,   65,   65,   65,   66,  230,  392,  456,  472,   67,
 /*   150 */    56,   69,  151,  169,  406,  435,   60,   59,  294,  430,
 /*   160 */   431,  427,  427,   62,   62,   61,   61,   61,   61,  247,
 /*   170 */    63,   63,   63,   63,   64,   64,   65,   65,   65,   66,
 /*   180 */   230,  289,  569,  522,  292,  620,  111,  478,  515,  447,
 /*   190 */   230,  316,  403,   21,   67,  460,   69,  151,   66,  230,
 /*   200 */   568,  443,  208,   67,  224,   69,  151,  420,  426,  146,
 /*   210 */   147,  393,  394,  410,   41,  386,  148,  531,    2,  487,
 /*   220 */   435,  566,  232,  415,  289,   60,   59,  294,  430,  431,
 /*   230 */   427,  427,   62,   62,   61,   61,   61,   61,  316,   63,
 /*   240 */    63,   63,   63,   64,   64,   65,   65,   65,   66,  230,
 /*   250 */   420,  426,  486,  330,  211,  417,  417,  417,  359,  270,
 /*   260 */   410,   41,  378,  207,  362,  542,  245,  289,   60,   59,
 /*   270 */   294,  430,  431,  427,  427,   62,   62,   61,   61,   61,
 /*   280 */    61,  392,   63,   63,   63,   63,   64,   64,   65,   65,
 /*   290 */    65,   66,  230,  420,  426,  260,  299,  273,  522,  271,
 /*   300 */   522,  210,  370,  319,  223,  433,  433,  532,   21,  576,
 /*   310 */    21,   60,   59,  294,  430,  431,  427,  427,   62,   62,
 /*   320 */    61,   61,   61,   61,  191,   63,   63,   63,   63,   64,
 /*   330 */    64,   65,   65,   65,   66,  230,  261,  316,  239,   76,
 /*   340 */   289,  544,  299,  149,  482,  150,  393,  394,  178,  240,
 /*   350 */   569,  341,  344,  345,  404,  520,  445,  322,  165,  410,
 /*   360 */    28,  540,  346,  517,  248,  539,  420,  426,  568,  567,
 /*   370 */   161,  115,  238,  339,  243,  340,  173,  358,  272,  411,
 /*   380 */   821,  488,   79,  249,   60,   59,  294,  430,  431,  427,
 /*   390 */   427,   62,   62,   61,   61,   61,   61,  530,   63,   63,
 /*   400 */    63,   63,   64,   64,   65,   65,   65,   66,  230,  289,
 /*   410 */   248,  178,  465,  485,  341,  344,  345,  115,  238,  339,
 /*   420 */   243,  340,  173,   82,  316,  346,  316,  491,  492,  249,
 /*   430 */   565,  207,  152,  523,  489,  420,  426,  178,  529,  503,
 /*   440 */   341,  344,  345,  407,  472,  528,  410,   35,  410,   35,
 /*   450 */   171,  346,  198,   60,   59,  294,  430,  431,  427,  427,
 /*   460 */    62,   62,   61,   61,   61,   61,  411,   63,   63,   63,
 /*   470 */    63,   64,   64,   65,   65,   65,   66,  230,  289,  548,
 /*   480 */   579,  288,  502,  234,  411,  316,  411,  316,  296,  283,
 /*   490 */   298,  316,  445,  521,  165,  476,  172,  157,  421,  422,
 /*   500 */   457,  335,  457,  144,  420,  426,  366,  410,   35,  410,
 /*   510 */    36,  435,    1,  410,   49,  327,  392,  547,  193,  424,
 /*   520 */   425,  156,   60,   59,  294,  430,  431,  427,  427,   62,
 /*   530 */    62,   61,   61,   61,   61,  333,   63,   63,   63,   63,
 /*   540 */    64,   64,   65,   65,   65,   66,  230,  289,  423,  332,
 /*   550 */   452,  252,  411,  295,  438,  439,  297,  316,  349,  307,
 /*   560 */   231,  457,  453,  321,  438,  439,  392,  369,  266,  265,
 /*   570 */   189,  217,  392,  420,  426,  454,  435,  493,  205,  410,
 /*   580 */    49,  393,  394,  583,  889,  174,  889,  494,  545,  492,
 /*   590 */   392,   60,   59,  294,  430,  431,  427,  427,   62,   62,
 /*   600 */    61,   61,   61,   61,  411,   63,   63,   63,   63,   64,
 /*   610 */    64,   65,   65,   65,   66,  230,  289,  207,  586,  387,
 /*   620 */   384,   91,   10,  580,  336,  308,  392,  207,  367,  480,
 /*   630 */   316,  393,  394,  583,  888,  219,  888,  393,  394,  476,
 /*   640 */   291,  233,  420,  426,  481,  249,  410,    3,  434,  260,
 /*   650 */   317,  363,  410,   29,  448,  393,  394,  468,  260,  289,
 /*   660 */    60,   59,  294,  430,  431,  427,  427,   62,   62,   61,
 /*   670 */    61,   61,   61,  580,   63,   63,   63,   63,   64,   64,
 /*   680 */    65,   65,   65,   66,  230,  420,  426,  391,  312,  388,
 /*   690 */   555,  393,  394,   75,  204,   77,  395,  396,  397,  557,
 /*   700 */   357,  197,  289,   60,   59,  294,  430,  431,  427,  427,
 /*   710 */    62,   62,   61,   61,   61,   61,  316,   63,   63,   63,
 /*   720 */    63,   64,   64,   65,   65,   65,   66,  230,  420,  426,
 /*   730 */   319,  116,  433,  433,  319,  411,  433,  433,  410,   24,
 /*   740 */   319,  515,  433,  433,  515,  289,   60,   70,  294,  430,
 /*   750 */   431,  427,  427,   62,   62,   61,   61,   61,   61,  375,
 /*   760 */    63,   63,   63,   63,   64,   64,   65,   65,   65,   66,
 /*   770 */   230,  420,  426,  538,  356,  538,  216,  260,  472,  303,
 /*   780 */   175,  176,  177,  254,  476,  515,  260,  383,  289,    5,
 /*   790 */    59,  294,  430,  431,  427,  427,   62,   62,   61,   61,
 /*   800 */    61,   61,  316,   63,   63,   63,   63,   64,   64,   65,
 /*   810 */    65,   65,   66,  230,  420,  426,  392,  236,  380,  247,
 /*   820 */   304,  258,  247,  256,  410,   33,  260,  558,  125,  467,
 /*   830 */   515,  416,  168,  157,  294,  430,  431,  427,  427,   62,
 /*   840 */    62,   61,   61,   61,   61,  306,   63,   63,   63,   63,
 /*   850 */    64,   64,   65,   65,   65,   66,  230,   72,  323,  452,
 /*   860 */     4,  153,   22,  247,  293,  305,  435,  559,  316,  382,
 /*   870 */   316,  453,  320,   72,  323,  316,    4,  366,  316,  180,
 /*   880 */   293,  393,  394,   20,  454,  141,  326,  316,  320,  325,
 /*   890 */   410,   53,  410,   52,  316,  411,  155,  410,   96,  447,
 /*   900 */   410,   94,  316,  500,  316,  325,  328,  469,  247,  410,
 /*   910 */    99,  444,  260,  411,  318,  447,  410,  100,  316,   74,
 /*   920 */    73,  467,  183,  260,  410,  110,  410,  112,   72,  314,
 /*   930 */   315,  435,  337,  415,  458,   74,   73,  479,  316,  377,
 /*   940 */   410,   17,  218,   19,   72,  314,  315,   72,  323,  415,
 /*   950 */     4,  205,  316,  274,  293,  316,  411,  466,  205,  409,
 /*   960 */   410,   97,  320,  408,  374,  417,  417,  417,  418,  419,
 /*   970 */    12,  376,  316,  206,  410,   34,  174,  410,   95,  325,
 /*   980 */    55,  417,  417,  417,  418,  419,   12,  310,  120,  447,
 /*   990 */   428,  159,    9,  260,  410,   25,  220,  221,  222,  102,
 /*  1000 */   441,  441,  316,  471,  409,  316,  475,  316,  408,   74,
 /*  1010 */    73,  436,  202,   23,  278,  455,  244,   13,   72,  314,
 /*  1020 */   315,  279,  316,  415,  410,   54,  316,  410,  113,  410,
 /*  1030 */   114,  291,  581,  200,  276,  547,  462,  497,  498,  199,
 /*  1040 */   316,  504,  201,  463,  410,   26,  316,  524,  410,   37,
 /*  1050 */   316,  474,  316,  170,  253,  417,  417,  417,  418,  419,
 /*  1060 */    12,  505,  410,   38,  510,  483,  316,   13,  410,   27,
 /*  1070 */   508,  582,  410,   39,  410,   40,  316,  255,  507,  506,
 /*  1080 */   512,  316,  125,  316,  511,  373,  275,  265,  410,   42,
 /*  1090 */   509,  290,  316,  251,  316,  125,  205,  257,  410,   43,
 /*  1100 */   316,  259,  316,  410,   44,  410,   30,  348,  316,  125,
 /*  1110 */   316,  353,  186,  316,  410,   31,  410,   45,  316,  543,
 /*  1120 */   379,  125,  410,   46,  410,   47,  316,  551,  264,  170,
 /*  1130 */   410,   48,  410,   32,  401,  410,   11,  552,  440,   89,
 /*  1140 */   410,   50,  301,  562,  578,   89,  287,  361,  410,   51,
 /*  1150 */   364,  365,  267,  268,  269,  554,  143,  564,  277,  324,
 /*  1160 */   280,  281,  575,  225,  442,  461,  464,  503,  241,  513,
 /*  1170 */   516,  550,  343,  160,  561,  390,    8,  313,  398,  399,
 /*  1180 */   400,  412,   82,  226,  331,  329,   81,  406,   57,   78,
 /*  1190 */   209,  167,   83,  459,  122,  414,  227,  334,  228,  338,
 /*  1200 */   300,  500,  103,  496,  246,  519,  514,  490,  495,  242,
 /*  1210 */   214,  518,  499,  229,  501,  413,  350,  533,  284,  525,
 /*  1220 */   526,  527,  235,  181,  473,  237,  285,  477,  182,  354,
 /*  1230 */   352,  184,   86,  185,  118,  535,  187,  546,  360,  190,
 /*  1240 */   129,  553,  139,  371,  372,  130,  215,  309,  560,  131,
 /*  1250 */   132,  133,  572,  577,  135,  573,   98,  574,  389,  262,
 /*  1260 */   402,  621,  536,  213,  101,  622,  432,  163,  164,  429,
 /*  1270 */   138,   71,  449,  437,  446,  140,  470,  154,    6,  450,
 /*  1280 */     7,  158,  166,  451,   14,  123,   13,  124,  484,  212,
 /*  1290 */    84,  342,  104,  105,   90,  250,   85,  117,  106,  347,
 /*  1300 */   179,  240,  351,  142,  534,  126,   18,  170,   93,  263,
 /*  1310 */   188,  107,  355,  286,  109,  127,  549,  541,  128,  119,
 /*  1320 */   537,  192,   15,  194,  195,  136,  196,  134,  556,  563,
 /*  1330 */   311,  137,   16,  108,  570,  203,  145,  385,  381,  282,
 /*  1340 */   584,  899,  899,  899,  899,  899,   87,  899,   88,
};
static const YYCODETYPE yy_lookahead[] = {
 /*     0 */    16,  139,  140,  141,  168,   21,  144,   23,   69,   70,
 /*    10 */    71,   72,  176,   74,   75,   76,   77,   78,   79,   80,
 /*    20 */    81,   82,   83,   84,    1,    2,   42,   43,   73,   74,
 /*    30 */    75,   76,   77,   78,   79,   80,   81,   82,   83,   84,
 /*    40 */    78,   79,   23,   58,   60,   61,   62,   63,   64,   65,
 /*    50 */    66,   67,   68,   69,   70,   71,   72,  110,   74,   75,
 /*    60 */    76,   77,   78,   79,   80,   81,   82,   83,   84,   16,
 /*    70 */   123,  147,   88,   88,  110,   22,  216,   92,  218,  219,
 /*    80 */    74,   75,   76,   77,   78,   79,   80,   81,   82,   83,
 /*    90 */    84,  147,   19,  169,  170,   42,   43,   78,  238,   46,
 /*   100 */    78,   79,   80,   81,   82,   83,   84,   88,   89,  124,
 /*   110 */   125,  126,   16,   60,   61,   62,   63,   64,   65,   66,
 /*   120 */    67,   68,   69,   70,   71,   72,  182,   74,   75,   76,
 /*   130 */    77,   78,   79,   80,   81,   82,   83,   84,   42,   43,
 /*   140 */    44,   80,   81,   82,   83,   84,   23,  223,  161,  216,
 /*   150 */    19,  218,  219,   21,   23,   23,   60,   61,   62,   63,
 /*   160 */    64,   65,   66,   67,   68,   69,   70,   71,   72,  225,
 /*   170 */    74,   75,   76,   77,   78,   79,   80,   81,   82,   83,
 /*   180 */    84,   16,  147,  147,  150,  112,   21,  200,  147,   58,
 /*   190 */    84,  147,  156,  157,  216,  217,  218,  219,   83,   84,
 /*   200 */   165,   78,   79,  216,  190,  218,  219,   42,   43,   78,
 /*   210 */    79,   88,   89,  169,  170,  141,  180,  181,  144,   88,
 /*   220 */    88,   98,  147,   92,   16,   60,   61,   62,   63,   64,
 /*   230 */    65,   66,   67,   68,   69,   70,   71,   72,  147,   74,
 /*   240 */    75,   76,   77,   78,   79,   80,   81,   82,   83,   84,
 /*   250 */    42,   43,  169,  209,  210,  124,  125,  126,  224,   14,
 /*   260 */   169,  170,  227,  228,  230,   18,  225,   16,   60,   61,
 /*   270 */    62,   63,   64,   65,   66,   67,   68,   69,   70,   71,
 /*   280 */    72,   23,   74,   75,   76,   77,   78,   79,   80,   81,
 /*   290 */    82,   83,   84,   42,   43,  147,   16,   52,  147,   54,
 /*   300 */   147,  210,   55,  106,  153,  108,  109,  156,  157,  156,
 /*   310 */   157,   60,   61,   62,   63,   64,   65,   66,   67,   68,
 /*   320 */    69,   70,   71,   72,   22,   74,   75,   76,   77,   78,
 /*   330 */    79,   80,   81,   82,   83,   84,  188,  147,   92,  131,
 /*   340 */    16,   94,   16,   22,   20,  155,   88,   89,   90,  103,
 /*   350 */   147,   93,   94,   95,  167,  168,  161,  162,  163,  169,
 /*   360 */   170,   25,  104,  176,   84,   29,   42,   43,  165,  166,
 /*   370 */    90,   91,   92,   93,   94,   95,   96,   41,  133,  189,
 /*   380 */   133,  169,  131,  103,   60,   61,   62,   63,   64,   65,
 /*   390 */    66,   67,   68,   69,   70,   71,   72,  181,   74,   75,
 /*   400 */    76,   77,   78,   79,   80,   81,   82,   83,   84,   16,
 /*   410 */    84,   90,   22,   20,   93,   94,   95,   91,   92,   93,
 /*   420 */    94,   95,   96,  121,  147,  104,  147,  185,  186,  103,
 /*   430 */   227,  228,  155,  181,  160,   42,   43,   90,  176,  177,
 /*   440 */    93,   94,   95,  169,  161,  183,  169,  170,  169,  170,
 /*   450 */   155,  104,  155,   60,   61,   62,   63,   64,   65,   66,
 /*   460 */    67,   68,   69,   70,   71,   72,  189,   74,   75,   76,
 /*   470 */    77,   78,   79,   80,   81,   82,   83,   84,   16,   11,
 /*   480 */   244,  245,   20,  200,  189,  147,  189,  147,  211,  158,
 /*   490 */   211,  147,  161,  162,  163,  147,  201,  202,   42,   43,
 /*   500 */   223,  206,  223,  113,   42,   43,  147,  169,  170,  169,
 /*   510 */   170,   23,   19,  169,  170,  186,   23,   49,  155,   63,
 /*   520 */    64,  147,   60,   61,   62,   63,   64,   65,   66,   67,
 /*   530 */    68,   69,   70,   71,   72,  147,   74,   75,   76,   77,
 /*   540 */    78,   79,   80,   81,   82,   83,   84,   16,   92,  211,
 /*   550 */    12,   20,  189,  164,  165,  166,  208,  147,   16,  215,
 /*   560 */   220,  223,   24,  164,  165,  166,   23,   99,  100,  101,
 /*   570 */   155,  212,   23,   42,   43,   37,   88,   39,  110,  169,
 /*   580 */   170,   88,   89,   19,   20,   43,   22,   49,  185,  186,
 /*   590 */    23,   60,   61,   62,   63,   64,   65,   66,   67,   68,
 /*   600 */    69,   70,   71,   72,  189,   74,   75,   76,   77,   78,
 /*   610 */    79,   80,   81,   82,   83,   84,   16,  228,    0,    1,
 /*   620 */     2,   21,   19,   59,  147,  215,   23,  228,  213,   80,
 /*   630 */   147,   88,   89,   19,   20,  145,   22,   88,   89,  147,
 /*   640 */    98,  147,   42,   43,   20,  103,  169,  170,   20,  147,
 /*   650 */   147,  236,  169,  170,   20,   88,   89,  114,  147,   16,
 /*   660 */    60,   61,   62,   63,   64,   65,   66,   67,   68,   69,
 /*   670 */    70,   71,   72,   59,   74,   75,   76,   77,   78,   79,
 /*   680 */    80,   81,   82,   83,   84,   42,   43,  147,  142,  143,
 /*   690 */   188,   88,   89,  130,  148,  132,    7,    8,    9,  188,
 /*   700 */   208,  155,   16,   60,   61,   62,   63,   64,   65,   66,
 /*   710 */    67,   68,   69,   70,   71,   72,  147,   74,   75,   76,
 /*   720 */    77,   78,   79,   80,   81,   82,   83,   84,   42,   43,
 /*   730 */   106,  147,  108,  109,  106,  189,  108,  109,  169,  170,
 /*   740 */   106,  147,  108,  109,  147,   16,   60,   61,   62,   63,
 /*   750 */    64,   65,   66,   67,   68,   69,   70,   71,   72,  213,
 /*   760 */    74,   75,   76,   77,   78,   79,   80,   81,   82,   83,
 /*   770 */    84,   42,   43,   99,  100,  101,  182,  147,  161,  182,
 /*   780 */    99,  100,  101,   14,  147,  147,  147,  241,   16,  191,
 /*   790 */    61,   62,   63,   64,   65,   66,   67,   68,   69,   70,
 /*   800 */    71,   72,  147,   74,   75,   76,   77,   78,   79,   80,
 /*   810 */    81,   82,   83,   84,   42,   43,   23,  200,  188,  225,
 /*   820 */   182,   52,  225,   54,  169,  170,  147,  188,   22,   22,
 /*   830 */   147,  147,  201,  202,   62,   63,   64,   65,   66,   67,
 /*   840 */    68,   69,   70,   71,   72,  208,   74,   75,   76,   77,
 /*   850 */    78,   79,   80,   81,   82,   83,   84,   16,   17,   12,
 /*   860 */    19,  155,   19,  225,   23,  182,   23,  188,  147,  239,
 /*   870 */   147,   24,   31,   16,   17,  147,   19,  147,  147,  155,
 /*   880 */    23,   88,   89,   19,   37,   21,   39,  147,   31,   48,
 /*   890 */   169,  170,  169,  170,  147,  189,   89,  169,  170,   58,
 /*   900 */   169,  170,  147,   97,  147,   48,  147,  114,  225,  169,
 /*   910 */   170,  161,  147,  189,   16,   58,  169,  170,  147,   78,
 /*   920 */    79,  114,  155,  147,  169,  170,  169,  170,   87,   88,
 /*   930 */    89,   88,   80,   92,  147,   78,   79,   80,  147,   91,
 /*   940 */   169,  170,  212,   19,   87,   88,   89,   16,   17,   92,
 /*   950 */    19,  110,  147,  188,   23,  147,  189,  203,  110,  107,
 /*   960 */   169,  170,   31,  111,  188,  124,  125,  126,  127,  128,
 /*   970 */   129,  123,  147,  192,  169,  170,   43,  169,  170,   48,
 /*   980 */   199,  124,  125,  126,  127,  128,  129,  242,  243,   58,
 /*   990 */    92,    5,   68,  147,  169,  170,   10,   11,   12,   13,
 /*  1000 */   124,  125,  147,  147,  107,  147,  147,  147,  111,   78,
 /*  1010 */    79,   20,   26,   22,   28,   20,  147,   22,   87,   88,
 /*  1020 */    89,   35,  147,   92,  169,  170,  147,  169,  170,  169,
 /*  1030 */   170,   98,   20,   47,  188,   49,   27,    7,    8,   53,
 /*  1040 */   147,  147,   56,   34,  169,  170,  147,  147,  169,  170,
 /*  1050 */   147,   20,  147,   22,  147,  124,  125,  126,  127,  128,
 /*  1060 */   129,  178,  169,  170,  178,   20,  147,   22,  169,  170,
 /*  1070 */    30,   59,  169,  170,  169,  170,  147,  147,   91,   92,
 /*  1080 */    20,  147,   22,  147,  178,   99,  100,  101,  169,  170,
 /*  1090 */    50,  105,  147,   20,  147,   22,  110,  147,  169,  170,
 /*  1100 */   147,  147,  147,  169,  170,  169,  170,   20,  147,   22,
 /*  1110 */   147,  233,  232,  147,  169,  170,  169,  170,  147,   20,
 /*  1120 */   134,   22,  169,  170,  169,  170,  147,   20,  147,   22,
 /*  1130 */   169,  170,  169,  170,  149,  169,  170,   20,  229,   22,
 /*  1140 */   169,  170,  102,   20,   20,   22,   22,  147,  169,  170,
 /*  1150 */   147,  147,  147,  147,  147,  147,  191,  147,  147,  222,
 /*  1160 */   147,  147,  147,  193,  229,  172,  172,  177,  172,  172,
 /*  1170 */   172,  194,  173,    6,  194,  146,   22,  154,  146,  146,
 /*  1180 */   146,  189,  121,  194,  118,  116,  119,   23,  120,  130,
 /*  1190 */   221,  112,   98,  152,  152,  160,  195,  115,  196,   98,
 /*  1200 */    40,   97,   19,  179,   84,  179,  160,  171,  171,  171,
 /*  1210 */   226,  160,  173,  197,  171,  198,   15,  152,  174,  171,
 /*  1220 */   171,  171,  204,  151,  205,  204,  174,  205,  151,   38,
 /*  1230 */   152,  151,  130,  152,   60,  152,  151,  184,  152,  184,
 /*  1240 */    19,  194,  214,  152,   15,  187,  226,  152,  194,  187,
 /*  1250 */   187,  187,   33,  137,  184,  152,  159,  152,    1,  234,
 /*  1260 */    20,  112,  235,  175,  175,  112,  107,  112,  112,   92,
 /*  1270 */   214,   19,   11,   20,   20,   19,  114,   19,  117,   20,
 /*  1280 */   117,  112,   22,   20,   22,   19,   22,   20,   20,   44,
 /*  1290 */    19,   44,   19,   19,  237,   20,   19,   32,   19,   44,
 /*  1300 */    96,  103,   16,   21,   17,   98,  231,   22,  237,  133,
 /*  1310 */    98,   19,   36,    5,  240,   45,    1,   45,  102,  243,
 /*  1320 */    51,  122,   19,  113,   14,  102,  115,  113,   17,  123,
 /*  1330 */   246,  122,   19,   14,   20,  135,   19,    3,   57,  136,
 /*  1340 */     4,  247,  247,  247,  247,  247,   68,  247,   68,
};
#define YY_SHIFT_USE_DFLT (-62)
#define YY_SHIFT_MAX 385
static const short yy_shift_ofst[] = {
 /*     0 */    23,  841,  986,  -16,  841,  931,  931,  931,  258,  123,
 /*    10 */   -36,   96,  931,  931,  931,  931,  931,  -45,  468,   19,
 /*    20 */   567,  488,  -38,  -38,   53,  165,  208,  251,  324,  393,
 /*    30 */   462,  531,  600,  643,  686,  643,  643,  643,  643,  643,
 /*    40 */   643,  643,  643,  643,  643,  643,  643,  643,  643,  643,
 /*    50 */   643,  643,  729,  772,  772,  857,  931,  931,  931,  931,
 /*    60 */   931,  931,  931,  931,  931,  931,  931,  931,  931,  931,
 /*    70 */   931,  931,  931,  931,  931,  931,  931,  931,  931,  931,
 /*    80 */   931,  931,  931,  931,  931,  931,  931,  931,  931,  931,
 /*    90 */   931,  931,  931,  931,  -61,  -61,    6,    6,  280,   22,
 /*   100 */    61,  542,  247,  567,  567,  567,  567,  567,  567,  567,
 /*   110 */   115,  488,  106,  -62,  -62,  131,  326,  538,  538,  564,
 /*   120 */   614,  618,  132,  567,  132,  567,  567,  567,  567,  567,
 /*   130 */   567,  567,  567,  567,  567,  567,  567,  567,  848,  -53,
 /*   140 */   -36,  -36,  -36,  -62,  -62,  -62,  -15,  -15,  321,  347,
 /*   150 */   624,  493,  628,  634,  847,  543,  793,  603,  549,  689,
 /*   160 */   567,  567,  852,  567,  567,  843,  567,  567,  807,  567,
 /*   170 */   567,  197,  807,  567,  567, 1040, 1040, 1040,  567,  567,
 /*   180 */   197,  567,  567,  197,  567,  336,  674,  567,  567,  197,
 /*   190 */   567,  567,  567,  197,  567,  567,  567,  197,  197,  567,
 /*   200 */   567,  567,  567,  567,  864,  897,  390,  876,  876,  563,
 /*   210 */  1009, 1009, 1009,  933, 1009, 1009,  806,  302,  302, 1167,
 /*   220 */  1167, 1167, 1167, 1154,  -36, 1061, 1066, 1067, 1069, 1068,
 /*   230 */  1164, 1059, 1079, 1079, 1094, 1082, 1094, 1082, 1101, 1101,
 /*   240 */  1160, 1101, 1104, 1101, 1183, 1120, 1164, 1120, 1164, 1160,
 /*   250 */  1101, 1101, 1101, 1183, 1201, 1079, 1201, 1079, 1201, 1079,
 /*   260 */  1079, 1191, 1102, 1201, 1079, 1174, 1174, 1221, 1061, 1079,
 /*   270 */  1229, 1229, 1229, 1229, 1061, 1174, 1221, 1079, 1219, 1219,
 /*   280 */  1079, 1079, 1116,  -62,  -62,  -62,  -62,  -62,  -62,  456,
 /*   290 */   245,  681,  769,   73,  898,  991,  995, 1031, 1045,  246,
 /*   300 */  1030,  987, 1060, 1073, 1087, 1099, 1107, 1117, 1123,  924,
 /*   310 */  1124, 1012, 1257, 1240, 1149, 1153, 1155, 1156, 1177, 1159,
 /*   320 */  1252, 1253, 1254, 1256, 1261, 1258, 1259, 1260, 1263, 1161,
 /*   330 */  1262, 1163, 1264, 1162, 1266, 1267, 1169, 1268, 1265, 1245,
 /*   340 */  1271, 1247, 1273, 1275, 1274, 1277, 1255, 1279, 1204, 1198,
 /*   350 */  1286, 1287, 1282, 1207, 1276, 1269, 1270, 1285, 1272, 1176,
 /*   360 */  1212, 1292, 1308, 1315, 1216, 1278, 1280, 1199, 1303, 1210,
 /*   370 */  1310, 1211, 1311, 1214, 1223, 1209, 1313, 1206, 1314, 1319,
 /*   380 */  1281, 1200, 1203, 1317, 1334, 1336,
};
#define YY_REDUCE_USE_DFLT (-165)
#define YY_REDUCE_MAX 288
static const short yy_reduce_ofst[] = {
 /*     0 */  -138,  277,  546,  -13,  190,  279,   44,  338,   36,  203,
 /*    10 */   295, -140,  340,  -76,   91,  344,  410,  -22,  415,   35,
 /*    20 */   151,  331,  389,  399,  -67,  -67,  -67,  -67,  -67,  -67,
 /*    30 */   -67,  -67,  -67,  -67,  -67,  -67,  -67,  -67,  -67,  -67,
 /*    40 */   -67,  -67,  -67,  -67,  -67,  -67,  -67,  -67,  -67,  -67,
 /*    50 */   -67,  -67,  -67,  -67,  -67,  477,  483,  569,  655,  721,
 /*    60 */   723,  728,  731,  740,  747,  755,  757,  771,  791,  805,
 /*    70 */   808,  825,  855,  858,  860,  875,  879,  893,  899,  903,
 /*    80 */   905,  919,  929,  934,  936,  945,  947,  953,  955,  961,
 /*    90 */   963,  966,  971,  979,  -67,  -67,  -67,  -67,  187,  -67,
 /*   100 */   -67,  262,   34,  -56,  594,  597,  638,  683,  630,  153,
 /*   110 */   -67,  195,  -67,  -67,  -67,  274, -164,  242,  403,  236,
 /*   120 */   236,   74,  283,  348,  617,   41,  148,  492,  359,  637,
 /*   130 */   502,  511,  639,  679,  765,  776,  730,  846,  297,  363,
 /*   140 */   706,  724,  767,  781,  631,  745,   83,  212,  216,  252,
 /*   150 */    14,   75,   14,   14,  329,  374,  388,  494,  503,  490,
 /*   160 */   540,  584,  598,  503,  684,  750,  759,  787,  754,  856,
 /*   170 */   859,   14,  754,  869,  894,  883,  886,  906,  900,  907,
 /*   180 */    14,  930,  950,   14,  954,  880,  878,  981, 1000,   14,
 /*   190 */  1003, 1004, 1005,   14, 1006, 1007, 1008,   14,   14, 1010,
 /*   200 */  1011, 1013, 1014, 1015,  985,  965,  970,  909,  935,  937,
 /*   210 */   993,  994,  996,  990,  997,  998,  999,  977,  980, 1029,
 /*   220 */  1032, 1033, 1034, 1023,  992,  989, 1001, 1002, 1016, 1017,
 /*   230 */  1035,  969, 1041, 1042, 1018, 1019, 1021, 1022, 1036, 1037,
 /*   240 */  1024, 1038, 1039, 1043, 1044,  984, 1046, 1020, 1051, 1026,
 /*   250 */  1048, 1049, 1050, 1052, 1072, 1065, 1077, 1078, 1080, 1081,
 /*   260 */  1083, 1025, 1027, 1085, 1086, 1053, 1055, 1028, 1047, 1091,
 /*   270 */  1058, 1062, 1063, 1064, 1054, 1070, 1056, 1095, 1057, 1071,
 /*   280 */  1103, 1105, 1074, 1097, 1088, 1089, 1075, 1076, 1084,
};
static const YYACTIONTYPE yy_default[] = {
 /*     0 */   592,  818,  897,  707,  897,  818,  897,  818,  897,  843,
 /*    10 */   711,  872,  814,  818,  897,  897,  897,  789,  897,  843,
 /*    20 */   897,  623,  843,  843,  740,  897,  897,  897,  897,  897,
 /*    30 */   897,  897,  897,  741,  897,  817,  813,  809,  811,  810,
 /*    40 */   742,  731,  738,  745,  723,  856,  747,  748,  754,  755,
 /*    50 */   873,  871,  777,  776,  795,  897,  897,  897,  897,  897,
 /*    60 */   897,  897,  897,  897,  897,  897,  897,  897,  897,  897,
 /*    70 */   897,  897,  897,  897,  897,  897,  897,  897,  897,  897,
 /*    80 */   897,  897,  897,  897,  897,  897,  897,  897,  897,  897,
 /*    90 */   897,  897,  897,  897,  779,  800,  778,  788,  616,  780,
 /*   100 */   781,  676,  611,  897,  897,  897,  897,  897,  897,  897,
 /*   110 */   782,  897,  783,  796,  797,  897,  897,  897,  897,  897,
 /*   120 */   897,  592,  707,  897,  707,  897,  897,  897,  897,  897,
 /*   130 */   897,  897,  897,  897,  897,  897,  897,  897,  897,  897,
 /*   140 */   897,  897,  897,  701,  711,  890,  897,  897,  667,  897,
 /*   150 */   897,  897,  897,  897,  897,  897,  897,  897,  897,  599,
 /*   160 */   597,  897,  699,  897,  897,  625,  897,  897,  709,  897,
 /*   170 */   897,  714,  715,  897,  897,  897,  897,  897,  897,  897,
 /*   180 */   613,  897,  897,  688,  897,  849,  897,  897,  897,  863,
 /*   190 */   897,  897,  897,  861,  897,  897,  897,  690,  750,  830,
 /*   200 */   897,  876,  878,  897,  897,  699,  708,  897,  897,  812,
 /*   210 */   734,  734,  734,  646,  734,  734,  649,  744,  744,  596,
 /*   220 */   596,  596,  596,  666,  897,  744,  735,  737,  727,  739,
 /*   230 */   897,  897,  716,  716,  724,  726,  724,  726,  678,  678,
 /*   240 */   663,  678,  649,  678,  822,  827,  897,  827,  897,  663,
 /*   250 */   678,  678,  678,  822,  608,  716,  608,  716,  608,  716,
 /*   260 */   716,  853,  855,  608,  716,  680,  680,  756,  744,  716,
 /*   270 */   687,  687,  687,  687,  744,  680,  756,  716,  875,  875,
 /*   280 */   716,  716,  883,  633,  651,  651,  858,  890,  895,  897,
 /*   290 */   897,  897,  897,  763,  897,  897,  897,  897,  897,  897,
 /*   300 */   897,  897,  897,  897,  897,  897,  897,  897,  897,  836,
 /*   310 */   897,  897,  897,  897,  768,  764,  897,  765,  897,  693,
 /*   320 */   897,  897,  897,  897,  897,  897,  897,  897,  897,  897,
 /*   330 */   728,  897,  736,  897,  897,  897,  897,  897,  897,  897,
 /*   340 */   897,  897,  897,  897,  897,  897,  897,  897,  897,  897,
 /*   350 */   897,  897,  897,  897,  897,  897,  851,  852,  897,  897,
 /*   360 */   897,  897,  897,  897,  897,  897,  897,  897,  897,  897,
 /*   370 */   897,  897,  897,  897,  897,  897,  897,  897,  897,  897,
 /*   380 */   882,  897,  897,  885,  593,  897,  587,  590,  589,  591,
 /*   390 */   595,  598,  620,  621,  622,  600,  601,  602,  603,  604,
 /*   400 */   605,  606,  612,  614,  632,  634,  618,  636,  697,  698,
 /*   410 */   760,  691,  692,  696,  771,  762,  766,  767,  769,  770,
 /*   420 */   784,  785,  787,  793,  799,  802,  786,  791,  792,  794,
 /*   430 */   798,  801,  694,  695,  805,  619,  626,  627,  630,  631,
 /*   440 */   839,  841,  840,  842,  629,  628,  772,  775,  807,  808,
 /*   450 */   864,  865,  866,  867,  868,  803,  815,  816,  717,  806,
 /*   460 */   790,  729,  732,  733,  730,  700,  710,  719,  720,  721,
 /*   470 */   722,  705,  706,  712,  725,  758,  759,  713,  702,  703,
 /*   480 */   704,  804,  761,  773,  774,  637,  638,  768,  639,  640,
 /*   490 */   641,  679,  682,  683,  684,  642,  661,  664,  665,  643,
 /*   500 */   650,  644,  645,  652,  653,  654,  657,  658,  659,  660,
 /*   510 */   655,  656,  823,  824,  828,  826,  825,  647,  648,  662,
 /*   520 */   635,  624,  617,  668,  671,  672,  673,  674,  675,  677,
................................................................................
**      line of trace output.  If NULL, then tracing is
**      turned off.
** </ul>
**
** Outputs:
** None.
*/
static void sqlite3ParserTrace(FILE *TraceFILE, char *zTracePrompt){
  yyTraceFILE = TraceFILE;
  yyTracePrompt = zTracePrompt;
  if( yyTraceFILE==0 ) yyTracePrompt = 0;
  else if( yyTracePrompt==0 ) yyTraceFILE = 0;
}
#endif /* NDEBUG */

................................................................................
  "conslist",      "tcons",         "idxlist",       "defer_subclause_opt",
  "orconf",        "resolvetype",   "raisetype",     "ifexists",    
  "fullname",      "oneselect",     "multiselect_op",  "distinct",    
  "selcollist",    "from",          "where_opt",     "groupby_opt", 
  "having_opt",    "orderby_opt",   "limit_opt",     "sclp",        
  "as",            "seltablist",    "stl_prefix",    "joinop",      
  "on_opt",        "using_opt",     "seltablist_paren",  "joinop2",     
  "inscollist",    "sortlist",      "sortitem",      "exprlist",    
  "setlist",       "insert_cmd",    "inscollist_opt",  "itemlist",    
  "likeop",        "escape",        "between_op",    "in_op",       
  "case_operand",  "case_exprlist",  "case_else",     "expritem",    
  "uniqueflag",    "idxitem",       "collate",       "nmnum",       
  "plus_opt",      "number",        "trigger_decl",  "trigger_cmd_list",
  "trigger_time",  "trigger_event",  "foreach_clause",  "when_clause", 
  "trigger_cmd",   "database_kw_opt",  "key_opt",       "add_column_fullname",
  "kwcolumn_opt",  "create_vtab",   "vtabarglist",   "vtabarg",     
  "vtabargtoken",  "lp",            "anylist",     
};
................................................................................
 /* 143 */ "sortlist ::= sortlist COMMA sortitem sortorder",
 /* 144 */ "sortlist ::= sortitem sortorder",
 /* 145 */ "sortitem ::= expr",
 /* 146 */ "sortorder ::= ASC",
 /* 147 */ "sortorder ::= DESC",
 /* 148 */ "sortorder ::=",
 /* 149 */ "groupby_opt ::=",
 /* 150 */ "groupby_opt ::= GROUP BY exprlist",
 /* 151 */ "having_opt ::=",
 /* 152 */ "having_opt ::= HAVING expr",
 /* 153 */ "limit_opt ::=",
 /* 154 */ "limit_opt ::= LIMIT expr",
 /* 155 */ "limit_opt ::= LIMIT expr OFFSET expr",
 /* 156 */ "limit_opt ::= LIMIT expr COMMA expr",
 /* 157 */ "cmd ::= DELETE FROM fullname where_opt",
................................................................................
 /* 222 */ "expr ::= CASE case_operand case_exprlist case_else END",
 /* 223 */ "case_exprlist ::= case_exprlist WHEN expr THEN expr",
 /* 224 */ "case_exprlist ::= WHEN expr THEN expr",
 /* 225 */ "case_else ::= ELSE expr",
 /* 226 */ "case_else ::=",
 /* 227 */ "case_operand ::= expr",
 /* 228 */ "case_operand ::=",
 /* 229 */ "exprlist ::= exprlist COMMA expritem",
 /* 230 */ "exprlist ::= expritem",
 /* 231 */ "expritem ::= expr",
 /* 232 */ "expritem ::=",
 /* 233 */ "cmd ::= CREATE uniqueflag INDEX ifnotexists nm dbnm ON nm LP idxlist RP",
 /* 234 */ "uniqueflag ::= UNIQUE",
 /* 235 */ "uniqueflag ::=",
 /* 236 */ "idxlist_opt ::=",
 /* 237 */ "idxlist_opt ::= LP idxlist RP",
 /* 238 */ "idxlist ::= idxlist COMMA idxitem collate sortorder",
 /* 239 */ "idxlist ::= idxitem collate sortorder",
................................................................................
** Inputs:
** A pointer to the function used to allocate memory.
**
** Outputs:
** A pointer to a parser.  This pointer is used in subsequent calls
** to sqlite3Parser and sqlite3ParserFree.
*/
static void *sqlite3ParserAlloc(void *(*mallocProc)(size_t)){
  yyParser *pParser;
  pParser = (yyParser*)(*mallocProc)( (size_t)sizeof(yyParser) );
  if( pParser ){
    pParser->yyidx = -1;
#if YYSTACKDEPTH<=0
    yyGrowStack(pParser);
#endif
................................................................................
      break;
    case 169:
    case 170:
    case 194:
    case 196:
    case 204:
    case 210:
    case 217:
    case 220:
    case 222:
    case 223:
    case 235:
{sqlite3ExprDelete((yypminor->yy172));}
      break;
    case 174:
    case 182:
    case 192:
................................................................................
    case 195:
    case 197:
    case 199:
    case 209:
    case 211:
    case 212:
    case 215:

    case 221:
{sqlite3ExprListDelete((yypminor->yy174));}
      break;
    case 188:
    case 193:
    case 201:
    case 202:
{sqlite3SrcListDelete((yypminor->yy373));}
................................................................................
** <ul>
** <li>  A pointer to the parser.  This should be a pointer
**       obtained from sqlite3ParserAlloc.
** <li>  A pointer to a function used to reclaim memory obtained
**       from malloc.
** </ul>
*/
static void sqlite3ParserFree(
  void *p,                    /* The parser to be deleted */
  void (*freeProc)(void*)     /* Function used to reclaim memory */
){
  yyParser *pParser = (yyParser*)p;
  if( pParser==0 ) return;
  while( pParser->yyidx>=0 ) yy_pop_parser_stack(pParser);
#if YYSTACKDEPTH<=0
................................................................................
  { 170, 3 },
  { 170, 3 },
  { 170, 3 },
  { 170, 3 },
  { 170, 3 },
  { 170, 3 },
  { 170, 3 },
  { 216, 1 },
  { 216, 2 },
  { 216, 1 },
  { 216, 2 },
  { 217, 2 },
  { 217, 0 },
  { 170, 4 },
  { 170, 2 },
  { 170, 3 },
  { 170, 3 },
  { 170, 4 },
  { 170, 2 },
  { 170, 2 },
  { 170, 2 },
  { 218, 1 },
  { 218, 2 },
  { 170, 5 },
  { 219, 1 },
  { 219, 2 },
  { 170, 5 },
  { 170, 3 },
  { 170, 5 },
  { 170, 4 },
  { 170, 4 },
  { 170, 5 },
  { 221, 5 },
  { 221, 4 },
  { 222, 2 },
  { 222, 0 },
  { 220, 1 },
  { 220, 0 },


  { 211, 3 },
  { 211, 1 },
  { 223, 1 },
  { 223, 0 },
  { 143, 11 },
  { 224, 1 },
  { 224, 0 },
  { 174, 0 },
  { 174, 3 },
  { 182, 5 },
  { 182, 3 },
................................................................................
      case 114:
      case 237:
{yygotominor.yy174 = yymsp[-1].minor.yy174;}
        break;
      case 115:
      case 141:
      case 149:

      case 236:
{yygotominor.yy174 = 0;}
        break;
      case 116:
{
   yygotominor.yy174 = sqlite3ExprListAppend(yymsp[-2].minor.yy174,yymsp[-1].minor.yy172,yymsp[0].minor.yy410.n?&yymsp[0].minor.yy410:0);
}
................................................................................
      case 145:
      case 152:
      case 159:
      case 174:
      case 202:
      case 225:
      case 227:
      case 231:
{yygotominor.yy172 = yymsp[0].minor.yy172;}
        break;
      case 138:
      case 151:
      case 158:
      case 203:
      case 226:
      case 228:
      case 232:
{yygotominor.yy172 = 0;}
        break;
      case 139:
      case 171:
{yygotominor.yy432 = yymsp[-1].minor.yy432;}
        break;
      case 140:
      case 170:
{yygotominor.yy432 = 0;}
        break;
      case 142:
      case 150:

{yygotominor.yy174 = yymsp[0].minor.yy174;}
        break;
      case 143:
{
  yygotominor.yy174 = sqlite3ExprListAppend(yymsp[-3].minor.yy174,yymsp[-1].minor.yy172,0);
  if( yygotominor.yy174 ) yygotominor.yy174->a[yygotominor.yy174->nExpr-1].sortOrder = yymsp[0].minor.yy46;
}
................................................................................
      case 164:
{sqlite3Insert(pParse, yymsp[-2].minor.yy373, 0, yymsp[0].minor.yy219, yymsp[-1].minor.yy432, yymsp[-4].minor.yy46);}
        break;
      case 165:
{sqlite3Insert(pParse, yymsp[-3].minor.yy373, 0, 0, yymsp[-2].minor.yy432, yymsp[-5].minor.yy46);}
        break;
      case 168:
      case 229:
{yygotominor.yy174 = sqlite3ExprListAppend(yymsp[-2].minor.yy174,yymsp[0].minor.yy172,0);}
        break;
      case 169:
      case 230:
{yygotominor.yy174 = sqlite3ExprListAppend(0,yymsp[0].minor.yy172,0);}
        break;
      case 172:
{yygotominor.yy432 = sqlite3IdListAppend(yymsp[-2].minor.yy432,&yymsp[0].minor.yy410);}
        break;
      case 173:
{yygotominor.yy432 = sqlite3IdListAppend(0,&yymsp[0].minor.yy410);}
................................................................................
** <li> The minor token number.
** <li> An option argument of a grammar-specified type.
** </ul>
**
** Outputs:
** None.
*/
static void sqlite3Parser(
  void *yyp,                   /* The parser */
  int yymajor,                 /* The major token code number */
  sqlite3ParserTOKENTYPE yyminor       /* The value for the token */
  sqlite3ParserARG_PDECL               /* Optional %extra_argument parameter */
){
  YYMINORTYPE yyminorunion;
  int yyact;            /* The parser action. */
................................................................................
*************************************************************************
** An tokenizer for SQL
**
** This file contains C code that splits an SQL input string up into
** individual tokens and sends those tokens one-by-one over to the
** parser for analysis.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** The charMap() macro maps alphabetic characters into their
** lower-case ASCII equivalent.  On ASCII machines, this is just
** an upper-to-lower case map.  On EBCDIC machines we also need
** to adjust the encoding.  Only alphabetic characters and underscores
................................................................................
*/
/************** Include keywordhash.h in the middle of tokenize.c ************/
/************** Begin file keywordhash.h *************************************/
/***** This file contains automatically generated code ******
**
** The code in this file has been automatically generated by
**
**     $Header: /cvsroot/sqlite-dotnet2/SQLite.NET/SQLite.Interop/src/sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
**
** The code in this file implements a function that determines whether
** or not a given identifier is really an SQL keyword.  The same thing
** might be implemented more directly using a hand-written hash table.
** But by using this automatically generated code, the size of the code
** is substantially reduced.  This is important for embedded applications
** on platforms with limited memory.
................................................................................
  for(i=((int)aHash[h])-1; i>=0; i=((int)aNext[i])-1){
    if( aLen[i]==n && sqlite3StrNICmp(&zText[aOffset[i]],z,n)==0 ){
      return aCode[i];
    }
  }
  return TK_ID;
}
static int sqlite3KeywordCode(const unsigned char *z, int n){
  return keywordCode((char*)z, n);
}

/************** End of keywordhash.h *****************************************/
/************** Continuing where we left off in tokenize.c *******************/


................................................................................
      *tokenType = keywordCode((char*)z, i);
      return i;
    }
  }
  *tokenType = TK_ILLEGAL;
  return 1;
}
static int sqlite3GetToken(const unsigned char *z, int *tokenType){
  return getToken(z, tokenType);
}








/*
** Run the parser on the given SQL string.  The parser structure is
** passed in.  An SQLITE_ status code is returned.  If an error occurs
** and pzErrMsg!=NULL then an error message might be written into 
** memory obtained from malloc() and *pzErrMsg made to point to that
** error message.  Or maybe not.
*/
static int sqlite3RunParser(Parse *pParse, const char *zSql, char **pzErrMsg){
  int nErr = 0;
  int i;
  void *pEngine;
  int tokenType;
  int lastTokenParsed = -1;
  sqlite3 *db = pParse->db;
  extern void *sqlite3ParserAlloc(void*(*)(size_t));
  extern void sqlite3ParserFree(void*, void(*)(void*));
  extern void sqlite3Parser(void*, int, Token, Parse*);

  if( db->activeVdbeCnt==0 ){
    db->u1.isInterrupted = 0;
  }
  pParse->rc = SQLITE_OK;
  i = 0;
  pEngine = sqlite3ParserAlloc((void*(*)(size_t))sqlite3MallocX);
................................................................................
**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: sqlite3.c,v 1.3 2007/06/19 22:43:23 rmsimpson Exp $
*/

/*
** The version of the library
*/
const char sqlite3_version[] = SQLITE_VERSION;
const char *sqlite3_libversion(void){ return sqlite3_version; }
int sqlite3_libversion_number(void){ return SQLITE_VERSION_NUMBER; }

/*
** If the following function pointer is not NULL and if
** SQLITE_ENABLE_IOTRACE is enabled, then messages describing
** I/O active are written using this function.  These messages
** are intended for debugging activity only.
................................................................................
sqlite_int64 sqlite3_last_insert_rowid(sqlite3 *db){
  return db->lastRowid;
}

/*
** Return the number of changes in the most recent call to sqlite3_exec().
*/
int sqlite3_changes(sqlite3 *db){
  return db->nChange;
}

/*
** Return the number of changes since the database handle was opened.
*/
int sqlite3_total_changes(sqlite3 *db){
  return db->nTotalChange;
}

/*
** Close an existing SQLite database
*/
int sqlite3_close(sqlite3 *db){
  HashElem *i;
  int j;

  if( !db ){
    return SQLITE_OK;
  }
  if( sqlite3SafetyCheck(db) ){
................................................................................
    }
    sqliteFree(pColl);
  }
  sqlite3HashClear(&db->aCollSeq);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  for(i=sqliteHashFirst(&db->aModule); i; i=sqliteHashNext(i)){
    Module *pMod = (Module *)sqliteHashData(i);



    sqliteFree(pMod);
  }
  sqlite3HashClear(&db->aModule);
#endif

  sqlite3HashClear(&db->aFunc);
  sqlite3Error(db, SQLITE_OK, 0); /* Deallocates any cached error strings. */
................................................................................
  sqlite3ReleaseThreadData();
  return SQLITE_OK;
}

/*
** Rollback all database files.
*/
static void sqlite3RollbackAll(sqlite3 *db){
  int i;
  int inTrans = 0;
  for(i=0; i<db->nDb; i++){
    if( db->aDb[i].pBt ){
      if( sqlite3BtreeIsInTrans(db->aDb[i].pBt) ){
        inTrans = 1;
      }
................................................................................
  }
}

/*
** Return a static string that describes the kind of error specified in the
** argument.
*/
static const char *sqlite3ErrStr(int rc){
  const char *z;
  switch( rc & 0xff ){
    case SQLITE_ROW:
    case SQLITE_DONE:
    case SQLITE_OK:         z = "not an error";                          break;
    case SQLITE_ERROR:      z = "SQL logic error or missing database";   break;
    case SQLITE_PERM:       z = "access permission denied";              break;
................................................................................
/*
** Invoke the given busy handler.
**
** This routine is called when an operation failed with a lock.
** If this routine returns non-zero, the lock is retried.  If it
** returns 0, the operation aborts with an SQLITE_BUSY error.
*/
static int sqlite3InvokeBusyHandler(BusyHandler *p){
  int rc;
  if( p==0 || p->xFunc==0 || p->nBusy<0 ) return 0;
  rc = p->xFunc(p->pArg, p->nBusy);
  if( rc==0 ){
    p->nBusy = -1;
  }else{
    p->nBusy++;
................................................................................
  }
  return SQLITE_OK;
}

/*
** Cause any pending operation to stop at its earliest opportunity.
*/
void sqlite3_interrupt(sqlite3 *db){
  if( db && (db->magic==SQLITE_MAGIC_OPEN || db->magic==SQLITE_MAGIC_BUSY) ){
    db->u1.isInterrupted = 1;
  }
}

/*
** Memory allocation routines that use SQLites internal memory
................................................................................
** internal memory allocator might be just an alias for the
** system default malloc/realloc/free.  Or the built-in allocator
** might do extra stuff like put sentinals around buffers to 
** check for overruns or look for memory leaks.
**
** Use sqlite3_free() to free memory returned by sqlite3_mprintf().
*/
void sqlite3_free(void *p){ if( p ) sqlite3OsFree(p); }
void *sqlite3_malloc(int nByte){ return nByte>0 ? sqlite3OsMalloc(nByte) : 0; }
void *sqlite3_realloc(void *pOld, int nByte){ 
  if( pOld ){
    if( nByte>0 ){
      return sqlite3OsRealloc(pOld, nByte);
    }else{
      sqlite3OsFree(pOld);
      return 0;
    }
................................................................................

/*
** This function is exactly the same as sqlite3_create_function(), except
** that it is designed to be called by internal code. The difference is
** that if a malloc() fails in sqlite3_create_function(), an error code
** is returned and the mallocFailed flag cleared. 
*/
static int sqlite3CreateFunc(
  sqlite3 *db,
  const char *zFunctionName,
  int nArg,
  int enc,
  void *pUserData,
  void (*xFunc)(sqlite3_context*,int,sqlite3_value **),
  void (*xStep)(sqlite3_context*,int,sqlite3_value **),
................................................................................
** Register a trace function.  The pArg from the previously registered trace
** is returned.  
**
** A NULL trace function means that no tracing is executes.  A non-NULL
** trace is a pointer to a function that is invoked at the start of each
** SQL statement.
*/
void *sqlite3_trace(sqlite3 *db, void (*xTrace)(void*,const char*), void *pArg){
  void *pOld = db->pTraceArg;
  db->xTrace = xTrace;
  db->pTraceArg = pArg;
  return pOld;
}
/*
** Register a profile function.  The pArg from the previously registered 
** profile function is returned.  
**
** A NULL profile function means that no profiling is executes.  A non-NULL
** profile is a pointer to a function that is invoked at the conclusion of
** each SQL statement that is run.
*/
void *sqlite3_profile(
  sqlite3 *db,
  void (*xProfile)(void*,const char*,sqlite_uint64),
  void *pArg
){
  void *pOld = db->pProfileArg;
  db->xProfile = xProfile;
  db->pProfileArg = pArg;
................................................................................
**           1                2              memory
**           1                0              file
**           2                1              file
**           2                2              memory
**           2                0              memory
**           3               any             memory
*/
static int sqlite3BtreeFactory(
  const sqlite3 *db,        /* Main database when opening aux otherwise 0 */
  const char *zFilename,    /* Name of the file containing the BTree database */
  int omitJournal,          /* if TRUE then do not journal this file */
  int nCache,               /* How many pages in the page cache */
  Btree **ppBtree           /* Pointer to new Btree object written here */
){
  int btree_flags = 0;
................................................................................
  return rc;
}

/*
** Return UTF-8 encoded English language explanation of the most recent
** error.
*/
const char *sqlite3_errmsg(sqlite3 *db){
  const char *z;
  assert( !sqlite3MallocFailed() );
  if( !db ){
    return sqlite3ErrStr(SQLITE_NOMEM);
  }
  if( sqlite3SafetyCheck(db) || db->errCode==SQLITE_MISUSE ){
    return sqlite3ErrStr(SQLITE_MISUSE);
................................................................................
}

#ifndef SQLITE_OMIT_UTF16
/*
** Return UTF-16 encoded English language explanation of the most recent
** error.
*/
const void *sqlite3_errmsg16(sqlite3 *db){
  /* Because all the characters in the string are in the unicode
  ** range 0x00-0xFF, if we pad the big-endian string with a 
  ** zero byte, we can obtain the little-endian string with
  ** &big_endian[1].
  */
  static const char outOfMemBe[] = {
    0, 'o', 0, 'u', 0, 't', 0, ' ', 
................................................................................
}
#endif /* SQLITE_OMIT_UTF16 */

/*
** Return the most recent error code generated by an SQLite routine. If NULL is
** passed to this function, we assume a malloc() failed during sqlite3_open().
*/
int sqlite3_errcode(sqlite3 *db){
  if( !db || sqlite3MallocFailed() ){
    return SQLITE_NOMEM;
  }
  if( sqlite3SafetyCheck(db) ){
    return SQLITE_MISUSE;
  }
  return db->errCode & db->errMask;
................................................................................
  */
  db->aDb[0].zName = "main";
  db->aDb[0].safety_level = 3;
#ifndef SQLITE_OMIT_TEMPDB
  db->aDb[1].zName = "temp";
  db->aDb[1].safety_level = 1;
#endif






  /* Register all built-in functions, but do not attempt to read the
  ** database schema yet. This is delayed until the first time the database
  ** is accessed.
  */
  if( !sqlite3MallocFailed() ){
    sqlite3Error(db, SQLITE_OK, 0);
    sqlite3RegisterBuiltinFunctions(db);
  }
  db->magic = SQLITE_MAGIC_OPEN;

  /* Load automatic extensions - extensions that have been registered
  ** using the sqlite3_automatic_extension() API.
  */
  (void)sqlite3AutoLoadExtensions(db);



#ifdef SQLITE_ENABLE_FTS1
  {


    extern int sqlite3Fts1Init(sqlite3*);
    sqlite3Fts1Init(db);
  }
#endif

#ifdef SQLITE_ENABLE_FTS2
  {

    extern int sqlite3Fts2Init(sqlite3*);
    sqlite3Fts2Init(db);
  }
#endif

#ifdef SQLITE_ENABLE_ICU
  if( !sqlite3MallocFailed() ){
    extern int sqlite3IcuInit(sqlite3*);
    sqlite3IcuInit(db);
  }
#endif


  /* -DSQLITE_DEFAULT_LOCKING_MODE=1 makes EXCLUSIVE the default locking
  ** mode.  -DSQLITE_DEFAULT_LOCKING_MODE=0 make NORMAL the default locking
  ** mode.  Doing nothing at all also makes NORMAL the default.
  */
#ifdef SQLITE_DEFAULT_LOCKING_MODE
  db->dfltLockMode = SQLITE_DEFAULT_LOCKING_MODE;
................................................................................
  *ppDb = db;
  return sqlite3ApiExit(0, rc);
}

/*
** Open a new database handle.
*/
int sqlite3_open(
  const char *zFilename, 
  sqlite3 **ppDb 
){
  return openDatabase(zFilename, ppDb);
}

#ifndef SQLITE_OMIT_UTF16
/*
** Open a new database handle.
*/
int sqlite3_open16(
  const void *zFilename, 
  sqlite3 **ppDb
){
  char const *zFilename8;   /* zFilename encoded in UTF-8 instead of UTF-16 */
  int rc = SQLITE_OK;
  sqlite3_value *pVal;

................................................................................
** the sqlite3_compile() routine. The integer returned is an SQLITE_
** success/failure code that describes the result of executing the virtual
** machine.
**
** This routine sets the error code and string returned by
** sqlite3_errcode(), sqlite3_errmsg() and sqlite3_errmsg16().
*/
int sqlite3_finalize(sqlite3_stmt *pStmt){
  int rc;
  if( pStmt==0 ){
    rc = SQLITE_OK;
  }else{
    rc = sqlite3VdbeFinalize((Vdbe*)pStmt);
  }
  return rc;
................................................................................
** Terminate the current execution of an SQL statement and reset it
** back to its starting state so that it can be reused. A success code from
** the prior execution is returned.
**
** This routine sets the error code and string returned by
** sqlite3_errcode(), sqlite3_errmsg() and sqlite3_errmsg16().
*/
int sqlite3_reset(sqlite3_stmt *pStmt){
  int rc;
  if( pStmt==0 ){
    rc = SQLITE_OK;
  }else{
    rc = sqlite3VdbeReset((Vdbe*)pStmt);
    sqlite3VdbeMakeReady((Vdbe*)pStmt, -1, 0, 0, 0);
    assert( (rc & (sqlite3_db_handle(pStmt)->errMask))==rc );
................................................................................

#ifdef SQLITE_DEBUG
/*
** The following routine is subtituted for constant SQLITE_CORRUPT in
** debugging builds.  This provides a way to set a breakpoint for when
** corruption is first detected.
*/
static int sqlite3Corrupt(void){
  return SQLITE_CORRUPT;
}
#endif


#ifndef SQLITE_OMIT_SHARED_CACHE
/*
................................................................................
  }
  return rc;
}

/*
** Sleep for a little while.  Return the amount of time slept.
*/
int sqlite3_sleep(int ms){
  return sqlite3OsSleep(ms);
}

/*
** Enable or disable the extended result codes.
*/
int sqlite3_extended_result_codes(sqlite3 *db, int onoff){
  db->errMask = onoff ? 0xffffffff : 0xff;
  return SQLITE_OK;
}

/************** End of main.c ************************************************/

/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.4.1.  By combining all the individual C code files into this 
** single large file, the entire code can be compiled as a one translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% are more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
** programs, you need this file and the "sqlite3.h" header file that defines
** the programming interface to the SQLite library.  (If you do not have 
** the "sqlite3.h" header file at hand, you will find a copy in the first
** 2702 lines past this header comment.)  Additional code files may be
** needed if you want a wrapper to interface SQLite with your choice of
** programming language.  The code for the "sqlite3" command-line shell
** is also in a separate file.  This file contains only code for the core
** SQLite library.
**
** This amalgamation was generated on 2007-07-20 11:05:39 UTC.
*/
#define SQLITE_AMALGAMATION 1
#ifndef SQLITE_PRIVATE
# define SQLITE_PRIVATE static
#endif
#ifndef SQLITE_API
# define SQLITE_API
#endif
/************** Begin file sqlite3.h *****************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
................................................................................
** on how SQLite interfaces are suppose to operate.
**
** The name of this file under configuration management is "sqlite.h.in".
** The makefile makes some minor changes to this file (such as inserting
** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
**
** @(#) $Id: sqlite3.c,v 1.4 2007/07/21 08:51:43 rmsimpson Exp $
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
#include <stdarg.h>     /* Needed for the definition of va_list */

/*
** Make sure we can call this stuff from C++.
................................................................................
** (X*1000000 + Y*1000 + Z). For example, for version "3.1.1beta", 
** SQLITE_VERSION_NUMBER is set to 3001001. To detect if they are using 
** version 3.1.1 or greater at compile time, programs may use the test 
** (SQLITE_VERSION_NUMBER>=3001001).
**
** See also: [sqlite3_libversion()] and [sqlite3_libversion_number()].
*/
#define SQLITE_VERSION         "3.4.1"
#define SQLITE_VERSION_NUMBER 3004001

/*
** CAPI3REF: Run-Time Library Version Numbers
**
** These routines return values equivalent to the header constants
** [SQLITE_VERSION] and [SQLITE_VERSION_NUMBER].  The values returned
** by this routines should only be different from the header values
................................................................................
** The sqlite3_version[] string constant contains the text of the
** [SQLITE_VERSION] string.  The sqlite3_libversion() function returns
** a poiner to the sqlite3_version[] string constant.  The function
** is provided for DLL users who can only access functions and not
** constants within the DLL.
*/
extern const char sqlite3_version[];
SQLITE_API const char *sqlite3_libversion(void);
int sqlite3_libversion_number(void);

/*
** CAPI3REF: Database Connection Handle
**
** Each open SQLite database is represented by pointer to an instance of the
** opaque structure named "sqlite3".  It is useful to think of an sqlite3
................................................................................
** closed.
**
** All SQL statements prepared using [sqlite3_prepare_v2()] or
** [sqlite3_prepare16_v2()] must be destroyed using [sqlite3_finalize()]
** before this routine is called. Otherwise, SQLITE_BUSY is returned and the
** database connection remains open.
*/
SQLITE_API int sqlite3_close(sqlite3 *);

/*
** The type for a callback function.
** This is legacy and deprecated.  It is included for historical
** compatibility and is not documented.
*/
typedef int (*sqlite3_callback)(void*,int,char**, char**);
................................................................................
** then no error message is ever written.
**
** The return value is is SQLITE_OK if there are no errors and
** some other [SQLITE_OK | return code] if there is an error.  
** The particular return value depends on the type of error. 
**
*/
SQLITE_API int sqlite3_exec(
  sqlite3*,                                  /* An open database */
  const char *sql,                           /* SQL to be evaluted */
  int (*callback)(void*,int,char**,char**),  /* Callback function */
  void *,                                    /* 1st argument to callback */
  char **errmsg                              /* Error msg written here */
);

................................................................................
**
** If a callback invokes [sqlite3_exec()] or [sqlite3_step()] recursively,
** then the changes in the inner, recursive call are counted together
** with the changes in the outer call.
**
** SQLite implements the command "DELETE FROM table" without a WHERE clause
** by dropping and recreating the table.  (This is much faster than going
** through and deleting individual elements from the table.)  Because of
** this optimization, the change count for "DELETE FROM table" will be
** zero regardless of the number of elements that were originally in the
** table. To get an accurate count of the number of rows deleted, use
** "DELETE FROM table WHERE 1" instead.
*/
SQLITE_API int sqlite3_changes(sqlite3*);

/*
** CAPI3REF: Total Number Of Rows Modified
***
** This function returns the number of database rows that have been
** modified by INSERT, UPDATE or DELETE statements since the database handle
** was opened. This includes UPDATE, INSERT and DELETE statements executed
................................................................................
** thread that is currently running the database operation.
**
** The SQL operation that is interrupted will return [SQLITE_INTERRUPT].
** If an interrupted operation was an update that is inside an
** explicit transaction, then the entire transaction will be rolled
** back automatically.
*/
SQLITE_API void sqlite3_interrupt(sqlite3*);

/*
** CAPI3REF: Determine If An SQL Statement Is Complete
**
** These functions return true if the given input string comprises
** one or more complete SQL statements. For the sqlite3_complete() call,
** the parameter must be a nul-terminated UTF-8 string. For
................................................................................
** if additional input is needed before sending the statements into
** SQLite for parsing. The algorithm is simple.  If the 
** last token other than spaces and comments is a semicolon, then return 
** true.  Actually, the algorithm is a little more complicated than that
** in order to deal with triggers, but the basic idea is the same:  the
** statement is not complete unless it ends in a semicolon.
*/
SQLITE_API int sqlite3_complete(const char *sql);
SQLITE_API int sqlite3_complete16(const void *sql);

/*
** CAPI3REF: Register A Callback To Handle SQLITE_BUSY Errors
**
** This routine identifies a callback function that might be invoked
** whenever an attempt is made to open a database table 
** that another thread or process has locked.
................................................................................
**  sqlite3_exec(db, zSQL, 0, 0, 0);
**  sqlite3_free(zSQL);
** </pre></blockquote>
**
** The code above will render a correct SQL statement in the zSQL
** variable even if the zText variable is a NULL pointer.
*/
SQLITE_API char *sqlite3_mprintf(const char*,...);
SQLITE_API char *sqlite3_vmprintf(const char*, va_list);
SQLITE_API char *sqlite3_snprintf(int,char*,const char*, ...);

/*
** CAPI3REF: Memory Allocation Functions
**
** SQLite uses its own memory allocator.  On some installations, this
** memory allocator is identical to the standard malloc()/realloc()/free()
** and can be used interchangable.  On others, the implementations are
** different.  For maximum portability, it is best not to mix calls
** to the standard malloc/realloc/free with the sqlite versions.
*/
SQLITE_API void *sqlite3_malloc(int);
SQLITE_API void *sqlite3_realloc(void*, int);
SQLITE_API void sqlite3_free(void*);

/*
** CAPI3REF: Compile-Time Authorization Callbacks
***
** This routine registers a authorizer callback with the SQLite library.  
** The authorizer callback is invoked as SQL statements are being compiled
** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],
................................................................................
** The callback function registered by sqlite3_profile() is invoked
** as each SQL statement finishes and includes
** information on how long that statement ran.
**
** The sqlite3_profile() API is currently considered experimental and
** is subject to change.
*/
SQLITE_API void *sqlite3_trace(sqlite3*, void(*xTrace)(void*,const char*), void*);
SQLITE_API void *sqlite3_profile(sqlite3*,
   void(*xProfile)(void*,const char*,sqlite_uint64), void*);

/*
** CAPI3REF: Query Progress Callbacks
**
** This routine configures a callback function - the progress callback - that
** is invoked periodically during long running calls to [sqlite3_exec()],
................................................................................
** sqlite3_close() when it is no longer required.
**
** Note to windows users:  The encoding used for the filename argument
** of sqlite3_open() must be UTF-8, not whatever codepage is currently
** defined.  Filenames containing international characters must be converted
** to UTF-8 prior to passing them into sqlite3_open().
*/
SQLITE_API int sqlite3_open(
  const char *filename,   /* Database filename (UTF-8) */
  sqlite3 **ppDb          /* OUT: SQLite db handle */
);
SQLITE_API int sqlite3_open16(
  const void *filename,   /* Database filename (UTF-16) */
  sqlite3 **ppDb          /* OUT: SQLite db handle */
);

/*
** CAPI3REF: Error Codes And Messages
**
................................................................................
** an error code (examples: [sqlite3_data_count()] or [sqlite3_mprintf()]) do
** not change the error code returned by this routine.
**
** Assuming no other intervening sqlite3_* API calls are made, the error
** code returned by this function is associated with the same error as
** the strings returned by [sqlite3_errmsg()] and [sqlite3_errmsg16()].
*/
SQLITE_API int sqlite3_errcode(sqlite3 *db);
SQLITE_API const char *sqlite3_errmsg(sqlite3*);
SQLITE_API const void *sqlite3_errmsg16(sqlite3*);

/*
** CAPI3REF: SQL Statement Object
**
** Instance of this object represent single SQL statements.  This
** is variously known as a "prepared statement" or a 
** "compiled SQL statement" or simply as a "statement".
................................................................................
** program using one of these routines. 
**
** The first argument "db" is an [sqlite3 | SQLite database handle] 
** obtained from a prior call to [sqlite3_open()] or [sqlite3_open16()].
** The second argument "zSql" is the statement to be compiled, encoded
** as either UTF-8 or UTF-16.  The sqlite3_prepare() and sqlite3_prepare_v2()
** interfaces uses UTF-8 and sqlite3_prepare16() and sqlite3_prepare16_v2()
** use UTF-16.
**
** If the nByte argument is less
** than zero, then zSql is read up to the first zero terminator.  If


** nByte is non-negative, then it is the maximum number of 
** bytes read from zSql.  When nByte is non-negative, the
** zSql string ends at either the first '\000' character or 
** until the nByte-th byte, whichever comes first.
**
** *pzTail is made to point to the first byte past the end of the first
** SQL statement in zSql.  This routine only compiles the first statement
** in zSql, so *pzTail is left pointing to what remains uncompiled.
**
** *ppStmt is left pointing to a compiled 
** [sqlite3_stmt | SQL statement structure] that can be
................................................................................
** [SQLITE_ERROR] result code and you would have to make a second call to
** [sqlite3_reset()] in order to find the underlying cause of the problem.
** With the "v2" prepare interfaces, the underlying reason for the error is
** returned immediately.
** </li>
** </ol>
*/
SQLITE_API int sqlite3_prepare(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
int sqlite3_prepare_v2(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare16(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);
int sqlite3_prepare16_v2(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);

/*
** CAPI3REF:  Dynamically Typed Value Object
**
................................................................................

/*
** CAPI3REF: Source Of Data In A Query Result
**
** These routines provide a means to determine what column of what
** table in which database a result of a SELECT statement comes from.
** The name of the database or table or column can be returned as
** either a UTF8 or UTF16 string.  The _database_ routines return
** the database name, the _table_ routines return the table name, and
** the origin_ routines return the column name.
** The returned string is valid until
** the [sqlite3_stmt | prepared statement] is destroyed using
** [sqlite3_finalize()] or until the same information is requested

** again in a different encoding.
**
** The names returned are the original un-aliased names of the
** database, table, and column.
**
** The first argument to the following calls is a 
** [sqlite3_stmt | compiled SQL statement].
** These functions return information about the Nth column returned by 
** the statement, where N is the second function argument.
**
** If the Nth column returned by the statement is an expression
................................................................................
** We admit that this is a goofy design.  The problem has been fixed
** with the "v2" interface.  If you prepare all of your SQL statements
** using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] instead
** of the legacy [sqlite3_prepare()] and [sqlite3_prepare16()], then the 
** more specific [SQLITE_ERROR | result codes] are returned directly
** by sqlite3_step().  The use of the "v2" interface is recommended.
*/
SQLITE_API int sqlite3_step(sqlite3_stmt*);

/*
** CAPI3REF:
**
** Return the number of values in the current row of the result set.
**
** After a call to [sqlite3_step()] that returns [SQLITE_ROW], this routine
................................................................................
** [SQLITE_FLOAT], [SQLITE_TEXT], [SQLITE_BLOB], or [SQLITE_NULL].  The value
** returned by sqlite3_column_type() is only meaningful if no type
** conversions have occurred as described below.  After a type conversion,
** the value returned by sqlite3_column_type() is undefined.  Future
** versions of SQLite may change the behavior of sqlite3_column_type()
** following a type conversion.
**


** If the result is a BLOB or UTF-8 string then the sqlite3_column_bytes() 
** routine returns the number of bytes in that BLOB or string.
** If the result is a UTF-16 string, then sqlite3_column_bytes() converts
** the string to UTF-8 and then returns the number of bytes.
** If the result is a numeric value then sqlite3_column_bytes() uses
** [sqlite3_snprintf()] to convert that value to a UTF-8 string and returns
** the number of bytes in that string.
................................................................................
** [sqlite3_stmt | virtual machine].  If the virtual machine has not 
** completed execution when this routine is called, that is like
** encountering an error or an interrupt.  (See [sqlite3_interrupt()].) 
** Incomplete updates may be rolled back and transactions cancelled,  
** depending on the circumstances, and the 
** [SQLITE_ERROR | result code] returned will be [SQLITE_ABORT].
*/
SQLITE_API int sqlite3_finalize(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Reset A Prepared Statement Object
**
** The sqlite3_reset() function is called to reset a 
** [sqlite_stmt | compiled SQL statement] object.
** back to it's initial state, ready to be re-executed.
** Any SQL statement variables that had values bound to them using
** the [sqlite3_bind_blob | sqlite3_bind_*() API] retain their values.
** Use [sqlite3_clear_bindings()] to reset the bindings.
*/
SQLITE_API int sqlite3_reset(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Create Or Redefine SQL Functions
**
** The following two functions are used to add SQL functions or aggregates
** or to redefine the behavior of existing SQL functions or aggregates.  The
** difference only between the two is that the second parameter, the
................................................................................
** These functions are all now obsolete.  In order to maintain
** backwards compatibility with older code, we continue to support
** these functions.  However, new development projects should avoid
** the use of these functions.  To help encourage people to avoid
** using these functions, we are not going to tell you want they do.
*/
int sqlite3_aggregate_count(sqlite3_context*);
SQLITE_API int sqlite3_expired(sqlite3_stmt*);
int sqlite3_transfer_bindings(sqlite3_stmt*, sqlite3_stmt*);
int sqlite3_global_recover(void);


/*
** CAPI3REF: Obtaining SQL Function Parameter Values
**
................................................................................
/*
** Specify the key for an encrypted database.  This routine should be
** called right after sqlite3_open().
**
** The code to implement this API is not available in the public release
** of SQLite.
*/
SQLITE_API int sqlite3_key(
  sqlite3 *db,                   /* Database to be rekeyed */
  const void *pKey, int nKey     /* The key */
);

/*
** Change the key on an open database.  If the current database is not
** encrypted, this routine will encrypt it.  If pNew==0 or nNew==0, the
** database is decrypted.
**
** The code to implement this API is not available in the public release
** of SQLite.
*/
SQLITE_API int sqlite3_rekey(
  sqlite3 *db,                   /* Database to be rekeyed */
  const void *pKey, int nKey     /* The new key */
);

/*
** CAPI3REF:  Suspend Execution For A Short Time
**
** This function causes the current thread to suspend execution
** a number of milliseconds specified in its parameter.
**
** If the operating system does not support sleep requests with 
** millisecond time resolution, then the time will be rounded up to 
** the nearest second. The number of milliseconds of sleep actually 
** requested from the operating system is returned.
*/
SQLITE_API int sqlite3_sleep(int);

/*
** CAPI3REF:  Name Of The Folder Holding Temporary Files
**
** If this global variable is made to point to a string which is
** the name of a folder (a.ka. directory), then all temporary files
** created by SQLite will be placed in that directory.  If this variable
................................................................................
  int (*xBegin)(sqlite3_vtab *pVTab);
  int (*xSync)(sqlite3_vtab *pVTab);
  int (*xCommit)(sqlite3_vtab *pVTab);
  int (*xRollback)(sqlite3_vtab *pVTab);
  int (*xFindFunction)(sqlite3_vtab *pVtab, int nArg, const char *zName,
                       void (**pxFunc)(sqlite3_context*,int,sqlite3_value**),
                       void **ppArg);

  int (*xRename)(sqlite3_vtab *pVtab, const char *zNew);
};

/*
** The sqlite3_index_info structure and its substructures is used to
** pass information into and receive the reply from the xBestIndex
** method of an sqlite3_module.  The fields under **Inputs** are the
** inputs to xBestIndex and are read-only.  xBestIndex inserts its
................................................................................
*/
int sqlite3_create_module(
  sqlite3 *db,               /* SQLite connection to register module with */
  const char *zName,         /* Name of the module */
  const sqlite3_module *,    /* Methods for the module */
  void *                     /* Client data for xCreate/xConnect */
);

/*
** This routine is identical to the sqlite3_create_module() method above,
** except that it allows a destructor function to be specified. It is
** even more experimental than the rest of the virtual tables API.
*/
int sqlite3_create_module_v2(
  sqlite3 *db,               /* SQLite connection to register module with */
  const char *zName,         /* Name of the module */
  const sqlite3_module *,    /* Methods for the module */
  void *,                    /* Client data for xCreate/xConnect */
  void(*xDestroy)(void*)     /* Module destructor function */
);

/*
** Every module implementation uses a subclass of the following structure
** to describe a particular instance of the module.  Each subclass will
** be taylored to the specific needs of the module implementation.   The
** purpose of this superclass is to define certain fields that are common
** to all module implementations.
................................................................................
** This file contains the C functions that implement date and time
** functions for SQLite.  
**
** There is only one exported symbol in this file - the function
** sqlite3RegisterDateTimeFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: sqlite3.c,v 1.4 2007/07/21 08:51:43 rmsimpson Exp $
**
** SQLite processes all times and dates as Julian Day numbers.  The
** dates and times are stored as the number of days since noon
** in Greenwich on November 24, 4714 B.C. according to the Gregorian
** calendar system. 
**
** 1970-01-01 00:00:00 is JD 2440587.5
................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqlite3.c,v 1.4 2007/07/21 08:51:43 rmsimpson Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
/************** Include sqliteLimit.h in the middle of sqliteInt.h ***********/
/************** Begin file sqliteLimit.h *************************************/
/*
** 2007 May 7
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** 
** This file defines various limits of what SQLite can process.
**
** @(#) $Id: sqlite3.c,v 1.4 2007/07/21 08:51:43 rmsimpson Exp $
*/

/*
** The maximum length of a TEXT or BLOB in bytes.   This also
** limits the size of a row in a table or index.
**
** The hard limit is the ability of a 32-bit signed integer
................................................................................
** Maximum length (in bytes) of the pattern in a LIKE or GLOB
** operator.
*/
#ifndef SQLITE_MAX_LIKE_PATTERN_LENGTH
# define SQLITE_MAX_LIKE_PATTERN_LENGTH 50000
#endif

/************** End of sqliteLimit.h *****************************************/
/************** Continuing where we left off in sqliteInt.h ******************/


#if defined(SQLITE_TCL) || defined(TCLSH)
# include <tcl.h>
#endif

................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This is the header file for the generic hash-table implemenation
** used in SQLite.
**
** $Id: sqlite3.c,v 1.4 2007/07/21 08:51:43 rmsimpson Exp $
*/
#ifndef _SQLITE_HASH_H_
#define _SQLITE_HASH_H_

/* Forward declarations of structures. */
typedef struct Hash Hash;
typedef struct HashElem HashElem;
................................................................................
/* #define SQLITE_HASH_POINTER   2 // NOT USED */
#define SQLITE_HASH_STRING    3
#define SQLITE_HASH_BINARY    4

/*
** Access routines.  To delete, insert a NULL pointer.
*/
SQLITE_PRIVATE void sqlite3HashInit(Hash*, int keytype, int copyKey);
SQLITE_PRIVATE void *sqlite3HashInsert(Hash*, const void *pKey, int nKey, void *pData);
SQLITE_PRIVATE void *sqlite3HashFind(const Hash*, const void *pKey, int nKey);
SQLITE_PRIVATE void sqlite3HashClear(Hash*);

/*
** Macros for looping over all elements of a hash table.  The idiom is
** like this:
**
**   Hash h;
**   HashElem *p;
................................................................................
/************** Continuing where we left off in sqliteInt.h ******************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <stddef.h>


#define sqlite3_isnan(X)  ((X)!=(X))


/*
** If compiling for a processor that lacks floating point support,
** substitute integer for floating-point
*/
#ifdef SQLITE_OMIT_FLOATING_POINT
# define double sqlite_int64
................................................................................
*************************************************************************
** Header file for the Virtual DataBase Engine (VDBE)
**
** This header defines the interface to the virtual database engine
** or VDBE.  The VDBE implements an abstract machine that runs a
** simple program to access and modify the underlying database.
**
** $Id: sqlite3.c,v 1.4 2007/07/21 08:51:43 rmsimpson Exp $
*/
#ifndef _SQLITE_VDBE_H_
#define _SQLITE_VDBE_H_

/*
** A single VDBE is an opaque structure named "Vdbe".  Only routines
** in the source file sqliteVdbe.c are allowed to see the insides
................................................................................
#define OP_Remainder                           82   /* same as TK_REM      */
#define OP_NewRowid                            23
#define OP_Multiply                            80   /* same as TK_STAR     */
#define OP_IfMemNeg                            24
#define OP_Variable                            25
#define OP_String                              26
#define OP_RealAffinity                        27
#define OP_VRename                             28
#define OP_ParseSchema                         29
#define OP_VOpen                               30
#define OP_Close                               31
#define OP_CreateIndex                         32
#define OP_IsUnique                            33
#define OP_NotFound                            34
#define OP_Int64                               35
#define OP_MustBeInt                           36
#define OP_Halt                                37
#define OP_Rowid                               38
#define OP_IdxLT                               39
#define OP_AddImm                              40
#define OP_Statement                           41
#define OP_RowData                             42
#define OP_MemMax                              43
#define OP_Push                                44
#define OP_Or                                  60   /* same as TK_OR       */
#define OP_NotExists                           45
#define OP_MemIncr                             46
#define OP_Gosub                               47
#define OP_Divide                              81   /* same as TK_SLASH    */
#define OP_Integer                             48
#define OP_ToNumeric                          140   /* same as TK_TO_NUMERIC*/
#define OP_MemInt                              49
#define OP_Prev                                50
#define OP_Concat                              83   /* same as TK_CONCAT   */
#define OP_BitAnd                              74   /* same as TK_BITAND   */
#define OP_VColumn                             51
#define OP_CreateTable                         52
#define OP_Last                                53
#define OP_IsNull                              65   /* same as TK_ISNULL   */
#define OP_IncrVacuum                          54
#define OP_IdxRowid                            55
#define OP_MakeIdxRec                          56
#define OP_ShiftRight                          77   /* same as TK_RSHIFT   */
#define OP_ResetCount                          57
#define OP_FifoWrite                           58
#define OP_Callback                            59
#define OP_ContextPush                         62
#define OP_DropTrigger                         63
#define OP_DropIndex                           64
#define OP_IdxGE                               73
#define OP_IdxDelete                           84
#define OP_Vacuum                              86
#define OP_MoveLe                              89
#define OP_IfNot                               90
#define OP_DropTable                           91
#define OP_MakeRecord                          92
#define OP_ToBlob                             139   /* same as TK_TO_BLOB  */
#define OP_Delete                              93
#define OP_AggFinal                            94
#define OP_ShiftLeft                           76   /* same as TK_LSHIFT   */
#define OP_Dup                                 95
#define OP_Goto                                96
#define OP_TableLock                           97
#define OP_FifoRead                            98
#define OP_Clear                               99
#define OP_IdxGT                              100
#define OP_MoveLt                             101
#define OP_Le                                  70   /* same as TK_LE       */
#define OP_VerifyCookie                       102
#define OP_AggStep                            103
#define OP_Pull                               104
#define OP_ToText                             138   /* same as TK_TO_TEXT  */
#define OP_Not                                 16   /* same as TK_NOT      */
#define OP_ToReal                             142   /* same as TK_TO_REAL  */
#define OP_SetNumColumns                      105
#define OP_AbsValue                           106
#define OP_Transaction                        107
#define OP_VFilter                            108
#define OP_Negative                            85   /* same as TK_UMINUS   */
#define OP_Ne                                  67   /* same as TK_NE       */
#define OP_VDestroy                           109
#define OP_ContextPop                         110
#define OP_BitOr                               75   /* same as TK_BITOR    */
#define OP_Next                               111
#define OP_IdxInsert                          112
#define OP_Distinct                           113
#define OP_Lt                                  71   /* same as TK_LT       */
#define OP_Insert                             114
#define OP_Destroy                            115
#define OP_ReadCookie                         116
#define OP_ForceInt                           117
#define OP_LoadAnalysis                       118
#define OP_Explain                            119
#define OP_IfMemZero                          120
#define OP_OpenPseudo                         121
#define OP_OpenEphemeral                      122
#define OP_Null                               123
#define OP_Blob                               124
#define OP_Add                                 78   /* same as TK_PLUS     */
#define OP_MemStore                           127
#define OP_Rewind                             128
#define OP_MoveGe                             129
#define OP_VBegin                             130
#define OP_VUpdate                            131
#define OP_BitNot                              87   /* same as TK_BITNOT   */
#define OP_VCreate                            132
#define OP_MemMove                            133
#define OP_MemNull                            134
#define OP_Found                              135
#define OP_NullRow                            136

/* The following opcode values are never used */

#define OP_NotUsed_137                        137

/* Opcodes that are guaranteed to never push a value onto the stack
** contain a 1 their corresponding position of the following mask
** set.  See the opcodeNoPush() function in vdbeaux.c  */
#define NOPUSH_MASK_0 0xeeb4
#define NOPUSH_MASK_1 0xf96b
#define NOPUSH_MASK_2 0xfbb6
#define NOPUSH_MASK_3 0xfe64
#define NOPUSH_MASK_4 0xffff
#define NOPUSH_MASK_5 0x6ef7
#define NOPUSH_MASK_6 0xfbfb
#define NOPUSH_MASK_7 0x8767
#define NOPUSH_MASK_8 0x7d9f
#define NOPUSH_MASK_9 0x0000

/************** End of opcodes.h *********************************************/
/************** Continuing where we left off in vdbe.h ***********************/

/*
** Prototypes for the VDBE interface.  See comments on the implementation
** for a description of what each of these routines does.
*/
SQLITE_PRIVATE Vdbe *sqlite3VdbeCreate(sqlite3*);
SQLITE_PRIVATE int sqlite3VdbeAddOp(Vdbe*,int,int,int);
SQLITE_PRIVATE int sqlite3VdbeOp3(Vdbe*,int,int,int,const char *zP3,int);
SQLITE_PRIVATE int sqlite3VdbeAddOpList(Vdbe*, int nOp, VdbeOpList const *aOp);
SQLITE_PRIVATE void sqlite3VdbeChangeP1(Vdbe*, int addr, int P1);
SQLITE_PRIVATE void sqlite3VdbeChangeP2(Vdbe*, int addr, int P2);
SQLITE_PRIVATE void sqlite3VdbeJumpHere(Vdbe*, int addr);
SQLITE_PRIVATE void sqlite3VdbeChangeToNoop(Vdbe*, int addr, int N);
SQLITE_PRIVATE void sqlite3VdbeChangeP3(Vdbe*, int addr, const char *zP1, int N);
SQLITE_PRIVATE VdbeOp *sqlite3VdbeGetOp(Vdbe*, int);
SQLITE_PRIVATE int sqlite3VdbeMakeLabel(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeDelete(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeMakeReady(Vdbe*,int,int,int,int);
SQLITE_PRIVATE int sqlite3VdbeFinalize(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeResolveLabel(Vdbe*, int);
SQLITE_PRIVATE int sqlite3VdbeCurrentAddr(Vdbe*);
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE   void sqlite3VdbeTrace(Vdbe*,FILE*);
#endif
SQLITE_PRIVATE void sqlite3VdbeResetStepResult(Vdbe*);
SQLITE_PRIVATE int sqlite3VdbeReset(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeSetNumCols(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, int);
SQLITE_PRIVATE void sqlite3VdbeCountChanges(Vdbe*);
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe*, const char *z, int n);
SQLITE_PRIVATE const char *sqlite3VdbeGetSql(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe*,Vdbe*);

#ifndef NDEBUG
SQLITE_PRIVATE   void sqlite3VdbeComment(Vdbe*, const char*, ...);
# define VdbeComment(X)  sqlite3VdbeComment X
#else
# define VdbeComment(X)
#endif

#endif

................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite B-Tree file
** subsystem.  See comments in the source code for a detailed description
** of what each interface routine does.
**
** @(#) $Id: sqlite3.c,v 1.4 2007/07/21 08:51:43 rmsimpson Exp $
*/
#ifndef _BTREE_H_
#define _BTREE_H_

/* TODO: This definition is just included so other modules compile. It
** needs to be revisited.
*/
................................................................................
** Forward declarations of structure
*/
typedef struct Btree Btree;
typedef struct BtCursor BtCursor;
typedef struct BtShared BtShared;


SQLITE_PRIVATE int sqlite3BtreeOpen(
  const char *zFilename,   /* Name of database file to open */
  sqlite3 *db,             /* Associated database connection */
  Btree **,                /* Return open Btree* here */
  int flags                /* Flags */
);

/* The flags parameter to sqlite3BtreeOpen can be the bitwise or of the
................................................................................
** NOTE:  These values must match the corresponding PAGER_ values in
** pager.h.
*/
#define BTREE_OMIT_JOURNAL  1  /* Do not use journal.  No argument */
#define BTREE_NO_READLOCK   2  /* Omit readlocks on readonly files */
#define BTREE_MEMORY        4  /* In-memory DB.  No argument */

SQLITE_PRIVATE int sqlite3BtreeClose(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetBusyHandler(Btree*,BusyHandler*);
SQLITE_PRIVATE int sqlite3BtreeSetCacheSize(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeSetSafetyLevel(Btree*,int,int);
SQLITE_PRIVATE int sqlite3BtreeSyncDisabled(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetPageSize(Btree*,int,int);
SQLITE_PRIVATE int sqlite3BtreeGetPageSize(Btree*);
SQLITE_PRIVATE int sqlite3BtreeMaxPageCount(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeGetReserve(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetAutoVacuum(Btree *, int);
SQLITE_PRIVATE int sqlite3BtreeGetAutoVacuum(Btree *);
SQLITE_PRIVATE int sqlite3BtreeBeginTrans(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeCommitPhaseOne(Btree*, const char *zMaster);
SQLITE_PRIVATE int sqlite3BtreeCommitPhaseTwo(Btree*);
SQLITE_PRIVATE int sqlite3BtreeCommit(Btree*);
SQLITE_PRIVATE int sqlite3BtreeRollback(Btree*);
SQLITE_PRIVATE int sqlite3BtreeBeginStmt(Btree*);
SQLITE_PRIVATE int sqlite3BtreeCommitStmt(Btree*);
SQLITE_PRIVATE int sqlite3BtreeRollbackStmt(Btree*);
SQLITE_PRIVATE int sqlite3BtreeCreateTable(Btree*, int*, int flags);
SQLITE_PRIVATE int sqlite3BtreeIsInTrans(Btree*);
SQLITE_PRIVATE int sqlite3BtreeIsInStmt(Btree*);
SQLITE_PRIVATE int sqlite3BtreeIsInReadTrans(Btree*);
SQLITE_PRIVATE void *sqlite3BtreeSchema(Btree *, int, void(*)(void *));
SQLITE_PRIVATE int sqlite3BtreeSchemaLocked(Btree *);
SQLITE_PRIVATE int sqlite3BtreeLockTable(Btree *, int, u8);

SQLITE_PRIVATE const char *sqlite3BtreeGetFilename(Btree *);
SQLITE_PRIVATE const char *sqlite3BtreeGetDirname(Btree *);
SQLITE_PRIVATE const char *sqlite3BtreeGetJournalname(Btree *);
SQLITE_PRIVATE int sqlite3BtreeCopyFile(Btree *, Btree *);

SQLITE_PRIVATE int sqlite3BtreeIncrVacuum(Btree *);

/* The flags parameter to sqlite3BtreeCreateTable can be the bitwise OR
** of the following flags:
*/
#define BTREE_INTKEY     1    /* Table has only 64-bit signed integer keys */
#define BTREE_ZERODATA   2    /* Table has keys only - no data */
#define BTREE_LEAFDATA   4    /* Data stored in leaves only.  Implies INTKEY */

SQLITE_PRIVATE int sqlite3BtreeDropTable(Btree*, int, int*);
SQLITE_PRIVATE int sqlite3BtreeClearTable(Btree*, int);
SQLITE_PRIVATE int sqlite3BtreeGetMeta(Btree*, int idx, u32 *pValue);
SQLITE_PRIVATE int sqlite3BtreeUpdateMeta(Btree*, int idx, u32 value);

SQLITE_PRIVATE int sqlite3BtreeCursor(
  Btree*,                              /* BTree containing table to open */
  int iTable,                          /* Index of root page */
  int wrFlag,                          /* 1 for writing.  0 for read-only */
  int(*)(void*,int,const void*,int,const void*),  /* Key comparison function */
  void*,                               /* First argument to compare function */
  BtCursor **ppCursor                  /* Returned cursor */
);

SQLITE_PRIVATE int sqlite3BtreeCloseCursor(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreeMoveto(BtCursor*,const void *pKey,i64 nKey,int bias,int *pRes);
SQLITE_PRIVATE int sqlite3BtreeDelete(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreeInsert(BtCursor*, const void *pKey, i64 nKey,
                                  const void *pData, int nData,
                                  int nZero, int bias);
SQLITE_PRIVATE int sqlite3BtreeFirst(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeLast(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeEof(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreeFlags(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeKeySize(BtCursor*, i64 *pSize);
SQLITE_PRIVATE int sqlite3BtreeKey(BtCursor*, u32 offset, u32 amt, void*);
SQLITE_PRIVATE const void *sqlite3BtreeKeyFetch(BtCursor*, int *pAmt);
SQLITE_PRIVATE const void *sqlite3BtreeDataFetch(BtCursor*, int *pAmt);
SQLITE_PRIVATE int sqlite3BtreeDataSize(BtCursor*, u32 *pSize);
SQLITE_PRIVATE int sqlite3BtreeData(BtCursor*, u32 offset, u32 amt, void*);

SQLITE_PRIVATE char *sqlite3BtreeIntegrityCheck(Btree*, int *aRoot, int nRoot, int, int*);
SQLITE_PRIVATE struct Pager *sqlite3BtreePager(Btree*);

SQLITE_PRIVATE int sqlite3BtreePutData(BtCursor*, u32 offset, u32 amt, void*);
SQLITE_PRIVATE void sqlite3BtreeCacheOverflow(BtCursor *);

#ifdef SQLITE_TEST
SQLITE_PRIVATE int sqlite3BtreeCursorInfo(BtCursor*, int*, int);
SQLITE_PRIVATE void sqlite3BtreeCursorList(Btree*);
SQLITE_PRIVATE int sqlite3BtreePageDump(Btree*, int, int recursive);
#endif

#endif /* _BTREE_H_ */

/************** End of btree.h ***********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
/************** Include pager.h in the middle of sqliteInt.h *****************/
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite page cache
** subsystem.  The page cache subsystem reads and writes a file a page
** at a time and provides a journal for rollback.
**
** @(#) $Id: sqlite3.c,v 1.4 2007/07/21 08:51:43 rmsimpson Exp $
*/

#ifndef _PAGER_H_
#define _PAGER_H_

/*
** The type used to represent a page number.  The first page in a file
................................................................................
#define PAGER_LOCKINGMODE_NORMAL      0
#define PAGER_LOCKINGMODE_EXCLUSIVE   1

/*
** See source code comments for a detailed description of the following
** routines:
*/
SQLITE_PRIVATE int sqlite3PagerOpen(Pager **ppPager, const char *zFilename,
                     int nExtra, int flags);
SQLITE_PRIVATE void sqlite3PagerSetBusyhandler(Pager*, BusyHandler *pBusyHandler);
SQLITE_PRIVATE void sqlite3PagerSetDestructor(Pager*, void(*)(DbPage*,int));
SQLITE_PRIVATE void sqlite3PagerSetReiniter(Pager*, void(*)(DbPage*,int));
SQLITE_PRIVATE int sqlite3PagerSetPagesize(Pager*, int);
SQLITE_PRIVATE int sqlite3PagerMaxPageCount(Pager*, int);
SQLITE_PRIVATE int sqlite3PagerReadFileheader(Pager*, int, unsigned char*);
SQLITE_PRIVATE void sqlite3PagerSetCachesize(Pager*, int);
SQLITE_PRIVATE int sqlite3PagerClose(Pager *pPager);
SQLITE_PRIVATE int sqlite3PagerAcquire(Pager *pPager, Pgno pgno, DbPage **ppPage, int clrFlag);
#define sqlite3PagerGet(A,B,C) sqlite3PagerAcquire(A,B,C,0)
SQLITE_PRIVATE DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno);
SQLITE_PRIVATE int sqlite3PagerRef(DbPage*);
SQLITE_PRIVATE int sqlite3PagerUnref(DbPage*);
SQLITE_PRIVATE int sqlite3PagerWrite(DbPage*);
SQLITE_PRIVATE int sqlite3PagerOverwrite(Pager *pPager, Pgno pgno, void*);
SQLITE_PRIVATE int sqlite3PagerPagecount(Pager*);
SQLITE_PRIVATE int sqlite3PagerTruncate(Pager*,Pgno);
SQLITE_PRIVATE int sqlite3PagerBegin(DbPage*, int exFlag);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseOne(Pager*,const char *zMaster, Pgno);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseTwo(Pager*);
SQLITE_PRIVATE int sqlite3PagerRollback(Pager*);
SQLITE_PRIVATE int sqlite3PagerIsreadonly(Pager*);
SQLITE_PRIVATE int sqlite3PagerStmtBegin(Pager*);
SQLITE_PRIVATE int sqlite3PagerStmtCommit(Pager*);
SQLITE_PRIVATE int sqlite3PagerStmtRollback(Pager*);
SQLITE_PRIVATE void sqlite3PagerDontRollback(DbPage*);
SQLITE_PRIVATE void sqlite3PagerDontWrite(DbPage*);
SQLITE_PRIVATE int sqlite3PagerRefcount(Pager*);
SQLITE_PRIVATE void sqlite3PagerSetSafetyLevel(Pager*,int,int);
SQLITE_PRIVATE const char *sqlite3PagerFilename(Pager*);
SQLITE_PRIVATE const char *sqlite3PagerDirname(Pager*);
SQLITE_PRIVATE const char *sqlite3PagerJournalname(Pager*);
SQLITE_PRIVATE int sqlite3PagerNosync(Pager*);
SQLITE_PRIVATE int sqlite3PagerMovepage(Pager*,DbPage*,Pgno);
SQLITE_PRIVATE void *sqlite3PagerGetData(DbPage *); 
SQLITE_PRIVATE void *sqlite3PagerGetExtra(DbPage *); 
SQLITE_PRIVATE int sqlite3PagerLockingMode(Pager *, int);

#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT) && !defined(SQLITE_OMIT_DISKIO)
SQLITE_PRIVATE   int sqlite3PagerReleaseMemory(int);
#endif

#ifdef SQLITE_HAS_CODEC
SQLITE_PRIVATE   void sqlite3PagerSetCodec(Pager*,void*(*)(void*,void*,Pgno,int),void*);
#endif

#if !defined(NDEBUG) || defined(SQLITE_TEST)
SQLITE_PRIVATE   Pgno sqlite3PagerPagenumber(DbPage*);
SQLITE_PRIVATE   int sqlite3PagerIswriteable(DbPage*);
#endif

#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
SQLITE_PRIVATE   int sqlite3PagerLockstate(Pager*);
#endif

#ifdef SQLITE_TEST
SQLITE_PRIVATE   int *sqlite3PagerStats(Pager*);
SQLITE_PRIVATE   void sqlite3PagerRefdump(Pager*);
  int pager3_refinfo_enable;
#endif

#ifdef SQLITE_TEST
void disable_simulated_io_errors(void);
void enable_simulated_io_errors(void);
#else
................................................................................
#if !defined(OS_UNIX) && !defined(OS_OTHER)
# define OS_OTHER 0
# ifndef OS_WIN
#   if defined(_WIN32) || defined(WIN32) || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__BORLANDC__)
#     define OS_WIN 1
#     define OS_UNIX 0
#     define OS_OS2 0
#   elif defined(__EMX__) || defined(_OS2) || defined(OS2) || defined(_OS2_) || defined(__OS2__)
#     define OS_WIN 0
#     define OS_UNIX 0
#     define OS_OS2 1
#   else
#     define OS_WIN 0
#     define OS_UNIX 1
#     define OS_OS2 0
................................................................................
/*
** Define the maximum size of a temporary filename
*/
#if OS_WIN
# include <windows.h>
# define SQLITE_TEMPNAME_SIZE (MAX_PATH+50)
#elif OS_OS2
# if (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ >= 3) && defined(OS2_HIGH_MEMORY)
#  include <os2safe.h> /* has to be included before os2.h for linking to work */
# endif
# define INCL_DOSDATETIME
# define INCL_DOSFILEMGR
# define INCL_DOSERRORS
# define INCL_DOSMISC
# define INCL_DOSPROCESS
# define INCL_DOSMODULEMGR
# include <os2.h>
# define SQLITE_TEMPNAME_SIZE (CCHMAXPATHCOMP)
#else
# define SQLITE_TEMPNAME_SIZE 200
#endif

/* If the SET_FULLSYNC macro is not defined above, then make it
................................................................................
#define RESERVED_BYTE     (PENDING_BYTE+1)
#define SHARED_FIRST      (PENDING_BYTE+2)
#define SHARED_SIZE       510

/*
** Prototypes for operating system interface routines.
*/
SQLITE_PRIVATE int sqlite3OsClose(OsFile**);
SQLITE_PRIVATE int sqlite3OsOpenDirectory(OsFile*, const char*);
SQLITE_PRIVATE int sqlite3OsRead(OsFile*, void*, int amt);
SQLITE_PRIVATE int sqlite3OsWrite(OsFile*, const void*, int amt);
SQLITE_PRIVATE int sqlite3OsSeek(OsFile*, i64 offset);
SQLITE_PRIVATE int sqlite3OsTruncate(OsFile*, i64 size);
SQLITE_PRIVATE int sqlite3OsSync(OsFile*, int);
SQLITE_PRIVATE void sqlite3OsSetFullSync(OsFile *id, int setting);
SQLITE_PRIVATE int sqlite3OsFileSize(OsFile*, i64 *pSize);
SQLITE_PRIVATE int sqlite3OsLock(OsFile*, int);
SQLITE_PRIVATE int sqlite3OsUnlock(OsFile*, int);
SQLITE_PRIVATE int sqlite3OsCheckReservedLock(OsFile *id);
SQLITE_PRIVATE int sqlite3OsOpenReadWrite(const char*, OsFile**, int*);
SQLITE_PRIVATE int sqlite3OsOpenExclusive(const char*, OsFile**, int);
SQLITE_PRIVATE int sqlite3OsOpenReadOnly(const char*, OsFile**);
SQLITE_PRIVATE int sqlite3OsDelete(const char*);
SQLITE_PRIVATE int sqlite3OsFileExists(const char*);
SQLITE_PRIVATE char *sqlite3OsFullPathname(const char*);
SQLITE_PRIVATE int sqlite3OsIsDirWritable(char*);
SQLITE_PRIVATE int sqlite3OsSyncDirectory(const char*);
SQLITE_PRIVATE int sqlite3OsSectorSize(OsFile *id);
SQLITE_PRIVATE int sqlite3OsTempFileName(char*);
SQLITE_PRIVATE int sqlite3OsRandomSeed(char*);
SQLITE_PRIVATE int sqlite3OsSleep(int ms);
SQLITE_PRIVATE int sqlite3OsCurrentTime(double*);
SQLITE_PRIVATE void sqlite3OsEnterMutex(void);
SQLITE_PRIVATE void sqlite3OsLeaveMutex(void);
SQLITE_PRIVATE int sqlite3OsInMutex(int);
SQLITE_PRIVATE ThreadData *sqlite3OsThreadSpecificData(int);
SQLITE_PRIVATE void *sqlite3OsMalloc(int);
SQLITE_PRIVATE void *sqlite3OsRealloc(void *, int);
SQLITE_PRIVATE void sqlite3OsFree(void *);
SQLITE_PRIVATE int sqlite3OsAllocationSize(void *);
SQLITE_PRIVATE void *sqlite3OsDlopen(const char*);
SQLITE_PRIVATE void *sqlite3OsDlsym(void*, const char*);
SQLITE_PRIVATE int sqlite3OsDlclose(void*);

#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
SQLITE_PRIVATE   int sqlite3OsFileHandle(OsFile *id);
SQLITE_PRIVATE   int sqlite3OsLockState(OsFile *id);
#endif

/*
** If the SQLITE_ENABLE_REDEF_IO macro is defined, then the OS-layer
** interface routines are not called directly but are invoked using
** pointers to functions.  This allows the implementation of various
** OS-layer interface routines to be modified at run-time.  There are
................................................................................
** instance of the following structure, stored in the sqlite3.aModule
** hash table.
*/
struct Module {
  const sqlite3_module *pModule;       /* Callback pointers */
  const char *zName;                   /* Name passed to create_module() */
  void *pAux;                          /* pAux passed to create_module() */
  void (*xDestroy)(void *);            /* Module destructor function */
};

/*
** Possible values for FuncDef.flags
*/
#define SQLITE_FUNC_LIKE   0x01  /* Candidate for the LIKE optimization */
#define SQLITE_FUNC_CASE   0x02  /* Case-sensitive LIKE-type function */
................................................................................
  char *zName;     /* Name of this column */
  Expr *pDflt;     /* Default value of this column */
  char *zType;     /* Data type for this column */
  char *zColl;     /* Collating sequence.  If NULL, use the default */
  u8 notNull;      /* True if there is a NOT NULL constraint */
  u8 isPrimKey;    /* True if this column is part of the PRIMARY KEY */
  char affinity;   /* One of the SQLITE_AFF_... values */
#ifndef SQLITE_OMIT_VIRTUALTABLE
  u8 isHidden;     /* True if this column is 'hidden' */
#endif
};

/*
** A "Collating Sequence" is defined by an instance of the following
** structure. Conceptually, a collating sequence consists of a name and
** a comparison routine that defines the order of that sequence.
**
................................................................................

/*
** Test to see whether or not a table is a virtual table.  This is
** done as a macro so that it will be optimized out when virtual
** table support is omitted from the build.
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE
#  define IsVirtual(X)      ((X)->isVirtual)
#  define IsHiddenColumn(X) ((X)->isHidden)
#else
#  define IsVirtual(X)      0
#  define IsHiddenColumn(X) 0
#endif

/*
** Each foreign key constraint is an instance of the following structure.
**
** A foreign key is associated with two tables.  The "from" table is
** the table that contains the REFERENCES clause that creates the foreign
................................................................................
/*
** The SQLITE_CORRUPT_BKPT macro can be either a constant (for production
** builds) or a function call (for debugging).  If it is a function call,
** it allows the operator to set a breakpoint at the spot where database
** corruption is first detected.
*/
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE   int sqlite3Corrupt(void);
# define SQLITE_CORRUPT_BKPT sqlite3Corrupt()
#else
# define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT
#endif

/*
** Internal function prototypes
*/
SQLITE_PRIVATE int sqlite3StrICmp(const char *, const char *);
SQLITE_PRIVATE int sqlite3StrNICmp(const char *, const char *, int);
SQLITE_PRIVATE int sqlite3IsNumber(const char*, int*, u8);

SQLITE_PRIVATE void *sqlite3Malloc(int,int);
SQLITE_PRIVATE void *sqlite3MallocRaw(int,int);
SQLITE_PRIVATE void *sqlite3Realloc(void*,int);
SQLITE_PRIVATE char *sqlite3StrDup(const char*);
SQLITE_PRIVATE char *sqlite3StrNDup(const char*, int);
# define sqlite3CheckMemory(a,b)
SQLITE_PRIVATE void *sqlite3ReallocOrFree(void*,int);
SQLITE_PRIVATE void sqlite3FreeX(void*);
SQLITE_PRIVATE void *sqlite3MallocX(int);
#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
SQLITE_PRIVATE   int sqlite3AllocSize(void *);
#endif

SQLITE_PRIVATE char *sqlite3MPrintf(const char*, ...);
SQLITE_PRIVATE char *sqlite3VMPrintf(const char*, va_list);
#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
SQLITE_PRIVATE   void sqlite3DebugPrintf(const char*, ...);
SQLITE_PRIVATE   void *sqlite3TextToPtr(const char*);
#endif
SQLITE_PRIVATE void sqlite3SetString(char **, ...);
SQLITE_PRIVATE void sqlite3ErrorMsg(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ErrorClear(Parse*);
SQLITE_PRIVATE void sqlite3Dequote(char*);
SQLITE_PRIVATE void sqlite3DequoteExpr(Expr*);
SQLITE_PRIVATE int sqlite3KeywordCode(const unsigned char*, int);
SQLITE_PRIVATE int sqlite3RunParser(Parse*, const char*, char **);
SQLITE_PRIVATE void sqlite3FinishCoding(Parse*);
SQLITE_PRIVATE Expr *sqlite3Expr(int, Expr*, Expr*, const Token*);
SQLITE_PRIVATE Expr *sqlite3ExprOrFree(int, Expr*, Expr*, const Token*);
SQLITE_PRIVATE Expr *sqlite3RegisterExpr(Parse*,Token*);
SQLITE_PRIVATE Expr *sqlite3ExprAnd(Expr*, Expr*);
SQLITE_PRIVATE void sqlite3ExprSpan(Expr*,Token*,Token*);
SQLITE_PRIVATE Expr *sqlite3ExprFunction(ExprList*, Token*);
SQLITE_PRIVATE void sqlite3ExprAssignVarNumber(Parse*, Expr*);
SQLITE_PRIVATE void sqlite3ExprDelete(Expr*);
SQLITE_PRIVATE ExprList *sqlite3ExprListAppend(ExprList*,Expr*,Token*);
SQLITE_PRIVATE void sqlite3ExprListDelete(ExprList*);
SQLITE_PRIVATE int sqlite3Init(sqlite3*, char**);
SQLITE_PRIVATE int sqlite3InitCallback(void*, int, char**, char**);
SQLITE_PRIVATE void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
SQLITE_PRIVATE void sqlite3ResetInternalSchema(sqlite3*, int);
SQLITE_PRIVATE void sqlite3BeginParse(Parse*,int);
SQLITE_PRIVATE void sqlite3CommitInternalChanges(sqlite3*);
SQLITE_PRIVATE Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*);
SQLITE_PRIVATE void sqlite3OpenMasterTable(Parse *, int);
SQLITE_PRIVATE void sqlite3StartTable(Parse*,Token*,Token*,int,int,int,int);
SQLITE_PRIVATE void sqlite3AddColumn(Parse*,Token*);
SQLITE_PRIVATE void sqlite3AddNotNull(Parse*, int);
SQLITE_PRIVATE void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int);
SQLITE_PRIVATE void sqlite3AddCheckConstraint(Parse*, Expr*);
SQLITE_PRIVATE void sqlite3AddColumnType(Parse*,Token*);
SQLITE_PRIVATE void sqlite3AddDefaultValue(Parse*,Expr*);
SQLITE_PRIVATE void sqlite3AddCollateType(Parse*, const char*, int);
SQLITE_PRIVATE void sqlite3EndTable(Parse*,Token*,Token*,Select*);

SQLITE_PRIVATE void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int);

#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
SQLITE_PRIVATE   int sqlite3ViewGetColumnNames(Parse*,Table*);
#else
# define sqlite3ViewGetColumnNames(A,B) 0
#endif

SQLITE_PRIVATE void sqlite3DropTable(Parse*, SrcList*, int, int);
SQLITE_PRIVATE void sqlite3DeleteTable(Table*);
SQLITE_PRIVATE void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int);
SQLITE_PRIVATE void *sqlite3ArrayAllocate(void*,int,int,int*,int*,int*);
SQLITE_PRIVATE IdList *sqlite3IdListAppend(IdList*, Token*);
SQLITE_PRIVATE int sqlite3IdListIndex(IdList*,const char*);
SQLITE_PRIVATE SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*);
SQLITE_PRIVATE SrcList *sqlite3SrcListAppendFromTerm(SrcList*, Token*, Token*, Token*,
                                      Select*, Expr*, IdList*);
SQLITE_PRIVATE void sqlite3SrcListShiftJoinType(SrcList*);
SQLITE_PRIVATE void sqlite3SrcListAssignCursors(Parse*, SrcList*);
SQLITE_PRIVATE void sqlite3IdListDelete(IdList*);
SQLITE_PRIVATE void sqlite3SrcListDelete(SrcList*);
SQLITE_PRIVATE void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
                        Token*, int, int);
SQLITE_PRIVATE void sqlite3DropIndex(Parse*, SrcList*, int);
SQLITE_PRIVATE int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*, char *aff);
SQLITE_PRIVATE Select *sqlite3SelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*,
                        int,Expr*,Expr*);
SQLITE_PRIVATE void sqlite3SelectDelete(Select*);
SQLITE_PRIVATE Table *sqlite3SrcListLookup(Parse*, SrcList*);
SQLITE_PRIVATE int sqlite3IsReadOnly(Parse*, Table*, int);
SQLITE_PRIVATE void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int);
SQLITE_PRIVATE void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
SQLITE_PRIVATE void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
SQLITE_PRIVATE WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**);
SQLITE_PRIVATE void sqlite3WhereEnd(WhereInfo*);
SQLITE_PRIVATE void sqlite3ExprCodeGetColumn(Vdbe*, Table*, int, int);
SQLITE_PRIVATE void sqlite3ExprCode(Parse*, Expr*);
SQLITE_PRIVATE void sqlite3ExprCodeAndCache(Parse*, Expr*);
SQLITE_PRIVATE int sqlite3ExprCodeExprList(Parse*, ExprList*);
SQLITE_PRIVATE void sqlite3ExprIfTrue(Parse*, Expr*, int, int);
SQLITE_PRIVATE void sqlite3ExprIfFalse(Parse*, Expr*, int, int);
SQLITE_PRIVATE Table *sqlite3FindTable(sqlite3*,const char*, const char*);
SQLITE_PRIVATE Table *sqlite3LocateTable(Parse*,const char*, const char*);
SQLITE_PRIVATE Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
SQLITE_PRIVATE void sqlite3Vacuum(Parse*);
SQLITE_PRIVATE int sqlite3RunVacuum(char**, sqlite3*);
SQLITE_PRIVATE char *sqlite3NameFromToken(Token*);
SQLITE_PRIVATE int sqlite3ExprCompare(Expr*, Expr*);
int sqliteFuncId(Token*);
SQLITE_PRIVATE int sqlite3ExprResolveNames(NameContext *, Expr *);
SQLITE_PRIVATE int sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
SQLITE_PRIVATE int sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);
SQLITE_PRIVATE Vdbe *sqlite3GetVdbe(Parse*);
SQLITE_PRIVATE Expr *sqlite3CreateIdExpr(const char*);
SQLITE_PRIVATE void sqlite3Randomness(int, void*);
SQLITE_PRIVATE void sqlite3RollbackAll(sqlite3*);
SQLITE_PRIVATE void sqlite3CodeVerifySchema(Parse*, int);
SQLITE_PRIVATE void sqlite3BeginTransaction(Parse*, int);
SQLITE_PRIVATE void sqlite3CommitTransaction(Parse*);
SQLITE_PRIVATE void sqlite3RollbackTransaction(Parse*);
SQLITE_PRIVATE int sqlite3ExprIsConstant(Expr*);
SQLITE_PRIVATE int sqlite3ExprIsConstantNotJoin(Expr*);
SQLITE_PRIVATE int sqlite3ExprIsConstantOrFunction(Expr*);
SQLITE_PRIVATE int sqlite3ExprIsInteger(Expr*, int*);
SQLITE_PRIVATE int sqlite3IsRowid(const char*);
SQLITE_PRIVATE void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int);
SQLITE_PRIVATE void sqlite3GenerateRowIndexDelete(Vdbe*, Table*, int, char*);
SQLITE_PRIVATE void sqlite3GenerateIndexKey(Vdbe*, Index*, int);
SQLITE_PRIVATE void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
SQLITE_PRIVATE void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int, int);
SQLITE_PRIVATE void sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
SQLITE_PRIVATE void sqlite3BeginWriteOperation(Parse*, int, int);
SQLITE_PRIVATE Expr *sqlite3ExprDup(Expr*);
SQLITE_PRIVATE void sqlite3TokenCopy(Token*, Token*);
SQLITE_PRIVATE ExprList *sqlite3ExprListDup(ExprList*);
SQLITE_PRIVATE SrcList *sqlite3SrcListDup(SrcList*);
SQLITE_PRIVATE IdList *sqlite3IdListDup(IdList*);
SQLITE_PRIVATE Select *sqlite3SelectDup(Select*);
SQLITE_PRIVATE FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int);
SQLITE_PRIVATE void sqlite3RegisterBuiltinFunctions(sqlite3*);
SQLITE_PRIVATE void sqlite3RegisterDateTimeFunctions(sqlite3*);
SQLITE_PRIVATE int sqlite3SafetyOn(sqlite3*);
SQLITE_PRIVATE int sqlite3SafetyOff(sqlite3*);
SQLITE_PRIVATE int sqlite3SafetyCheck(sqlite3*);
SQLITE_PRIVATE void sqlite3ChangeCookie(sqlite3*, Vdbe*, int);

#ifndef SQLITE_OMIT_TRIGGER
SQLITE_PRIVATE   void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*,
                           Expr*,int, int);
SQLITE_PRIVATE   void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*);
SQLITE_PRIVATE   void sqlite3DropTrigger(Parse*, SrcList*, int);
SQLITE_PRIVATE   void sqlite3DropTriggerPtr(Parse*, Trigger*);
SQLITE_PRIVATE   int sqlite3TriggersExist(Parse*, Table*, int, ExprList*);
SQLITE_PRIVATE   int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int, 
                           int, int);
  void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
SQLITE_PRIVATE   void sqlite3DeleteTriggerStep(TriggerStep*);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerSelectStep(Select*);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerInsertStep(Token*, IdList*, ExprList*,Select*,int);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerUpdateStep(Token*, ExprList*, Expr*, int);
SQLITE_PRIVATE   TriggerStep *sqlite3TriggerDeleteStep(Token*, Expr*);
SQLITE_PRIVATE   void sqlite3DeleteTrigger(Trigger*);
SQLITE_PRIVATE   void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
#else
# define sqlite3TriggersExist(A,B,C,D,E,F) 0
# define sqlite3DeleteTrigger(A)
# define sqlite3DropTriggerPtr(A,B)
# define sqlite3UnlinkAndDeleteTrigger(A,B,C)
# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 0
#endif

SQLITE_PRIVATE int sqlite3JoinType(Parse*, Token*, Token*, Token*);
SQLITE_PRIVATE void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int);
SQLITE_PRIVATE void sqlite3DeferForeignKey(Parse*, int);
#ifndef SQLITE_OMIT_AUTHORIZATION
SQLITE_PRIVATE   void sqlite3AuthRead(Parse*,Expr*,SrcList*);
SQLITE_PRIVATE   int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*);
SQLITE_PRIVATE   void sqlite3AuthContextPush(Parse*, AuthContext*, const char*);
SQLITE_PRIVATE   void sqlite3AuthContextPop(AuthContext*);
#else
# define sqlite3AuthRead(a,b,c)
# define sqlite3AuthCheck(a,b,c,d,e)    SQLITE_OK
# define sqlite3AuthContextPush(a,b,c)
# define sqlite3AuthContextPop(a)  ((void)(a))
#endif
SQLITE_PRIVATE void sqlite3Attach(Parse*, Expr*, Expr*, Expr*);
SQLITE_PRIVATE void sqlite3Detach(Parse*, Expr*);
SQLITE_PRIVATE int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename,
                       int omitJournal, int nCache, Btree **ppBtree);
SQLITE_PRIVATE int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
SQLITE_PRIVATE int sqlite3FixSrcList(DbFixer*, SrcList*);
SQLITE_PRIVATE int sqlite3FixSelect(DbFixer*, Select*);
SQLITE_PRIVATE int sqlite3FixExpr(DbFixer*, Expr*);
SQLITE_PRIVATE int sqlite3FixExprList(DbFixer*, ExprList*);
SQLITE_PRIVATE int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
SQLITE_PRIVATE int sqlite3AtoF(const char *z, double*);
SQLITE_API char *sqlite3_snprintf(int,char*,const char*,...);
SQLITE_PRIVATE int sqlite3GetInt32(const char *, int*);
SQLITE_PRIVATE int sqlite3FitsIn64Bits(const char *);
SQLITE_PRIVATE int sqlite3Utf16ByteLen(const void *pData, int nChar);
SQLITE_PRIVATE int sqlite3Utf8CharLen(const char *pData, int nByte);
SQLITE_PRIVATE u32 sqlite3ReadUtf8(const unsigned char *);
SQLITE_PRIVATE int sqlite3PutVarint(unsigned char *, u64);
SQLITE_PRIVATE int sqlite3GetVarint(const unsigned char *, u64 *);
SQLITE_PRIVATE int sqlite3GetVarint32(const unsigned char *, u32 *);
SQLITE_PRIVATE int sqlite3VarintLen(u64 v);
SQLITE_PRIVATE void sqlite3IndexAffinityStr(Vdbe *, Index *);
SQLITE_PRIVATE void sqlite3TableAffinityStr(Vdbe *, Table *);
SQLITE_PRIVATE char sqlite3CompareAffinity(Expr *pExpr, char aff2);
SQLITE_PRIVATE int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity);
SQLITE_PRIVATE char sqlite3ExprAffinity(Expr *pExpr);
SQLITE_PRIVATE int sqlite3Atoi64(const char*, i64*);
SQLITE_PRIVATE void sqlite3Error(sqlite3*, int, const char*,...);
SQLITE_PRIVATE void *sqlite3HexToBlob(const char *z);
SQLITE_PRIVATE int sqlite3TwoPartName(Parse *, Token *, Token *, Token **);
SQLITE_PRIVATE const char *sqlite3ErrStr(int);
SQLITE_PRIVATE int sqlite3ReadSchema(Parse *pParse);
SQLITE_PRIVATE CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char *,int,int);
SQLITE_PRIVATE CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName);
SQLITE_PRIVATE CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr);
SQLITE_PRIVATE Expr *sqlite3ExprSetColl(Parse *pParse, Expr *, Token *);
SQLITE_PRIVATE int sqlite3CheckCollSeq(Parse *, CollSeq *);
SQLITE_PRIVATE int sqlite3CheckObjectName(Parse *, const char *);
SQLITE_PRIVATE void sqlite3VdbeSetChanges(sqlite3 *, int);
SQLITE_PRIVATE void sqlite3Utf16Substr(sqlite3_context *,int,sqlite3_value **);

SQLITE_PRIVATE const void *sqlite3ValueText(sqlite3_value*, u8);
SQLITE_PRIVATE int sqlite3ValueBytes(sqlite3_value*, u8);
SQLITE_PRIVATE void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, void(*)(void*));
SQLITE_PRIVATE void sqlite3ValueFree(sqlite3_value*);
SQLITE_PRIVATE sqlite3_value *sqlite3ValueNew(void);
SQLITE_PRIVATE char *sqlite3Utf16to8(const void*, int);
SQLITE_PRIVATE int sqlite3ValueFromExpr(Expr *, u8, u8, sqlite3_value **);
SQLITE_PRIVATE void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
extern const unsigned char sqlite3UpperToLower[];
SQLITE_PRIVATE void sqlite3RootPageMoved(Db*, int, int);
SQLITE_PRIVATE void sqlite3Reindex(Parse*, Token*, Token*);
SQLITE_PRIVATE void sqlite3AlterFunctions(sqlite3*);
SQLITE_PRIVATE void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
SQLITE_PRIVATE int sqlite3GetToken(const unsigned char *, int *);
SQLITE_PRIVATE void sqlite3NestedParse(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ExpirePreparedStatements(sqlite3*);
SQLITE_PRIVATE void sqlite3CodeSubselect(Parse *, Expr *);
SQLITE_PRIVATE int sqlite3SelectResolve(Parse *, Select *, NameContext *);
SQLITE_PRIVATE void sqlite3ColumnDefault(Vdbe *, Table *, int);
SQLITE_PRIVATE void sqlite3AlterFinishAddColumn(Parse *, Token *);
SQLITE_PRIVATE void sqlite3AlterBeginAddColumn(Parse *, SrcList *);
SQLITE_PRIVATE CollSeq *sqlite3GetCollSeq(sqlite3*, CollSeq *, const char *, int);
SQLITE_PRIVATE char sqlite3AffinityType(const Token*);
SQLITE_PRIVATE void sqlite3Analyze(Parse*, Token*, Token*);
SQLITE_PRIVATE int sqlite3InvokeBusyHandler(BusyHandler*);
SQLITE_PRIVATE int sqlite3FindDb(sqlite3*, Token*);
SQLITE_PRIVATE int sqlite3AnalysisLoad(sqlite3*,int iDB);
SQLITE_PRIVATE void sqlite3DefaultRowEst(Index*);
SQLITE_PRIVATE void sqlite3RegisterLikeFunctions(sqlite3*, int);
SQLITE_PRIVATE int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*);
SQLITE_PRIVATE ThreadData *sqlite3ThreadData(void);
SQLITE_PRIVATE const ThreadData *sqlite3ThreadDataReadOnly(void);
SQLITE_PRIVATE void sqlite3ReleaseThreadData(void);
SQLITE_PRIVATE void sqlite3AttachFunctions(sqlite3 *);
SQLITE_PRIVATE void sqlite3MinimumFileFormat(Parse*, int, int);
SQLITE_PRIVATE void sqlite3SchemaFree(void *);
SQLITE_PRIVATE Schema *sqlite3SchemaGet(Btree *);
SQLITE_PRIVATE int sqlite3SchemaToIndex(sqlite3 *db, Schema *);
SQLITE_PRIVATE KeyInfo *sqlite3IndexKeyinfo(Parse *, Index *);
SQLITE_PRIVATE int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *, 
  void (*)(sqlite3_context*,int,sqlite3_value **),
  void (*)(sqlite3_context*,int,sqlite3_value **), void (*)(sqlite3_context*));
SQLITE_PRIVATE int sqlite3ApiExit(sqlite3 *db, int);
SQLITE_PRIVATE void sqlite3FailedMalloc(void);
SQLITE_PRIVATE void sqlite3AbortOtherActiveVdbes(sqlite3 *, Vdbe *);
SQLITE_PRIVATE int sqlite3OpenTempDatabase(Parse *);

#ifndef SQLITE_OMIT_LOAD_EXTENSION
SQLITE_PRIVATE   void sqlite3CloseExtensions(sqlite3*);
SQLITE_PRIVATE   int sqlite3AutoLoadExtensions(sqlite3*);
#else
# define sqlite3CloseExtensions(X)
# define sqlite3AutoLoadExtensions(X)  SQLITE_OK
#endif

#ifndef SQLITE_OMIT_SHARED_CACHE
SQLITE_PRIVATE   void sqlite3TableLock(Parse *, int, int, u8, const char *);
#else
  #define sqlite3TableLock(v,w,x,y,z)
#endif

#ifdef SQLITE_TEST
SQLITE_PRIVATE   int sqlite3Utf8To8(unsigned char*);
#endif

#ifdef SQLITE_MEMDEBUG
SQLITE_PRIVATE   void sqlite3MallocDisallow(void);
SQLITE_PRIVATE   void sqlite3MallocAllow(void);
SQLITE_PRIVATE   int sqlite3TestMallocFail(void);
#else
  #define sqlite3TestMallocFail() 0
  #define sqlite3MallocDisallow()
  #define sqlite3MallocAllow()
#endif

#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
SQLITE_PRIVATE   void *sqlite3ThreadSafeMalloc(int);
SQLITE_PRIVATE   void sqlite3ThreadSafeFree(void *);
#else
  #define sqlite3ThreadSafeMalloc sqlite3MallocX
  #define sqlite3ThreadSafeFree sqlite3FreeX
#endif

#ifdef SQLITE_OMIT_VIRTUALTABLE
#  define sqlite3VtabClear(X)
#  define sqlite3VtabSync(X,Y) (Y)
#  define sqlite3VtabRollback(X)
#  define sqlite3VtabCommit(X)
#else
SQLITE_PRIVATE    void sqlite3VtabClear(Table*);
SQLITE_PRIVATE    int sqlite3VtabSync(sqlite3 *db, int rc);
SQLITE_PRIVATE    int sqlite3VtabRollback(sqlite3 *db);
SQLITE_PRIVATE    int sqlite3VtabCommit(sqlite3 *db);
#endif
SQLITE_PRIVATE void sqlite3VtabLock(sqlite3_vtab*);
SQLITE_PRIVATE void sqlite3VtabUnlock(sqlite3*, sqlite3_vtab*);
SQLITE_PRIVATE void sqlite3VtabBeginParse(Parse*, Token*, Token*, Token*);
SQLITE_PRIVATE void sqlite3VtabFinishParse(Parse*, Token*);
SQLITE_PRIVATE void sqlite3VtabArgInit(Parse*);
SQLITE_PRIVATE void sqlite3VtabArgExtend(Parse*, Token*);
SQLITE_PRIVATE int sqlite3VtabCallCreate(sqlite3*, int, const char *, char **);
SQLITE_PRIVATE int sqlite3VtabCallConnect(Parse*, Table*);
SQLITE_PRIVATE int sqlite3VtabCallDestroy(sqlite3*, int, const char *);
SQLITE_PRIVATE int sqlite3VtabBegin(sqlite3 *, sqlite3_vtab *);
SQLITE_PRIVATE FuncDef *sqlite3VtabOverloadFunction(FuncDef*, int nArg, Expr*);
SQLITE_PRIVATE void sqlite3InvalidFunction(sqlite3_context*,int,sqlite3_value**);
SQLITE_PRIVATE int sqlite3Reprepare(Vdbe*);
SQLITE_PRIVATE void sqlite3ExprListCheckLength(Parse*, ExprList*, int, const char*);
CollSeq* sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);

#if SQLITE_MAX_EXPR_DEPTH>0
SQLITE_PRIVATE   void sqlite3ExprSetHeight(Expr *);
SQLITE_PRIVATE   int sqlite3SelectExprHeight(Select *);
#else
  #define sqlite3ExprSetHeight(x)
#endif

SQLITE_PRIVATE u32 sqlite3Get2byte(const u8*);
SQLITE_PRIVATE u32 sqlite3Get4byte(const u8*);
SQLITE_PRIVATE void sqlite3Put2byte(u8*, u32);
SQLITE_PRIVATE void sqlite3Put4byte(u8*, u32);

#ifdef SQLITE_SSE
#include "sseInt.h"
#endif

#ifdef SQLITE_DEBUG
SQLITE_PRIVATE   void sqlite3ParserTrace(FILE*, char *);
#endif

/*
** If the SQLITE_ENABLE IOTRACE exists then the global variable
** sqlite3_io_trace is a pointer to a printf-like routine used to
** print I/O tracing messages. 
*/
#ifdef SQLITE_ENABLE_IOTRACE
# define IOTRACE(A)  if( sqlite3_io_trace ){ sqlite3_io_trace A; }
SQLITE_PRIVATE   void sqlite3VdbeIOTraceSql(Vdbe*);
#else
# define IOTRACE(A)
# define sqlite3VdbeIOTraceSql(X)
#endif
extern void (*sqlite3_io_trace)(const char*,...);

#endif
................................................................................
#endif

/*
** This function registered all of the above C functions as SQL
** functions.  This should be the only routine in this file with
** external linkage.
*/
SQLITE_PRIVATE void sqlite3RegisterDateTimeFunctions(sqlite3 *db){
#ifndef SQLITE_OMIT_DATETIME_FUNCS
  static const struct {
     char *zName;
     int nArg;
     void (*xFunc)(sqlite3_context*,int,sqlite3_value**);
  } aFuncs[] = {
    { "julianday", -1, juliandayFunc   },
................................................................................

/*
** The following routines are convenience wrappers around methods
** of the OsFile object.  This is mostly just syntactic sugar.  All
** of this would be completely automatic if SQLite were coded using
** C++ instead of plain old C.
*/
SQLITE_PRIVATE int sqlite3OsClose(OsFile **pId){
  OsFile *id;
  if( pId!=0 && (id = *pId)!=0 ){
    return id->pMethod->xClose(pId);
  }else{
    return SQLITE_OK;
  }
}
SQLITE_PRIVATE int sqlite3OsOpenDirectory(OsFile *id, const char *zName){
  return id->pMethod->xOpenDirectory(id, zName);
}
SQLITE_PRIVATE int sqlite3OsRead(OsFile *id, void *pBuf, int amt){
  return id->pMethod->xRead(id, pBuf, amt);
}
SQLITE_PRIVATE int sqlite3OsWrite(OsFile *id, const void *pBuf, int amt){
  return id->pMethod->xWrite(id, pBuf, amt);
}
SQLITE_PRIVATE int sqlite3OsSeek(OsFile *id, i64 offset){
  return id->pMethod->xSeek(id, offset);
}
SQLITE_PRIVATE int sqlite3OsTruncate(OsFile *id, i64 size){
  return id->pMethod->xTruncate(id, size);
}
SQLITE_PRIVATE int sqlite3OsSync(OsFile *id, int fullsync){
  return id->pMethod->xSync(id, fullsync);
}
SQLITE_PRIVATE void sqlite3OsSetFullSync(OsFile *id, int value){
  id->pMethod->xSetFullSync(id, value);
}
SQLITE_PRIVATE int sqlite3OsFileSize(OsFile *id, i64 *pSize){
  return id->pMethod->xFileSize(id, pSize);
}
SQLITE_PRIVATE int sqlite3OsLock(OsFile *id, int lockType){
  return id->pMethod->xLock(id, lockType);
}
SQLITE_PRIVATE int sqlite3OsUnlock(OsFile *id, int lockType){
  return id->pMethod->xUnlock(id, lockType);
}
SQLITE_PRIVATE int sqlite3OsCheckReservedLoc