System.Data.SQLite

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    //       parameters and handle column values of types Int64 and Double).
    //
    internal const string SQLITE_DLL = "SQLite.Interop.087.dll";
#elif SQLITE_STANDARD
    //
    // NOTE: Otherwise, if the standard SQLite library is enabled, use it.
    //
    private const string SQLITE_DLL = "sqlite3";
    internal const string SQLITE_DLL = "sqlite3";
#elif USE_INTEROP_DLL
    //
      //
    // NOTE: Otherwise, if the native SQLite interop assembly is enabled,
    //       use it.
    //
    private const string SQLITE_DLL = "SQLite.Interop.dll";
    internal const string SQLITE_DLL = "SQLite.Interop.dll";
#else
    //
    // NOTE: Finally, assume that the mixed-mode assembly is being used.
    //
    private const string SQLITE_DLL = "System.Data.SQLite.dll";
    internal const string SQLITE_DLL = "System.Data.SQLite.dll";
#endif

    // This section uses interop calls that also fetch text length to optimize conversion.
    // When using the standard dll, we can replace these calls with normal sqlite calls and
    // do unoptimized conversions instead afterwards
    #region interop added textlength calls
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    [DllImport(SQLITE_DLL)]
#endif
    internal static extern int sqlite3_backup_pagecount(IntPtr backup);

#if !PLATFORM_COMPACTFRAMEWORK
    [DllImport(SQLITE_DLL, CallingConvention = CallingConvention.Cdecl)]
#else
    [DllImport(SQLITE_DLL)]
#endif
    internal static extern SQLiteErrorCode sqlite3_create_module_v2(IntPtr db, IntPtr name, IntPtr pModule, IntPtr pClientData, xDestroyModule xDestroy);

#if !PLATFORM_COMPACTFRAMEWORK
    [DllImport(SQLITE_DLL, CallingConvention = CallingConvention.Cdecl)]
#else
    [DllImport(SQLITE_DLL)]
#endif
    internal static extern SQLiteErrorCode sqlite3_declare_vtab(IntPtr db, IntPtr zSQL);

#if !PLATFORM_COMPACTFRAMEWORK
    [DllImport(SQLITE_DLL, CallingConvention = CallingConvention.Cdecl)]
#else
    [DllImport(SQLITE_DLL)]
#endif
    internal static extern IntPtr sqlite3_mprintf(IntPtr format, __arglist);
    #endregion

    // SQLite API calls that are provided by "well-known" extensions that may be statically
    // linked with the SQLite core native library currently in use.
    #region extension sqlite api calls
#if !PLATFORM_COMPACTFRAMEWORK
    [DllImport(SQLITE_DLL, CallingConvention = CallingConvention.Cdecl)]
#else
    [DllImport(SQLITE_DLL)]
#endif
    internal static extern IntPtr sqlite3_create_disposable_module(IntPtr db, IntPtr name, ref sqlite3_module module, IntPtr pClientData, xDestroyModule xDestroy);

#if !PLATFORM_COMPACTFRAMEWORK
    [DllImport(SQLITE_DLL, CallingConvention = CallingConvention.Cdecl)]
#else
    [DllImport(SQLITE_DLL)]
#endif
    internal static extern void sqlite3_dispose_module(ref sqlite3_module pModule);
    #endregion

    ///////////////////////////////////////////////////////////////////////////

    #region Native Delegates
#if !PLATFORM_COMPACTFRAMEWORK
    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
#endif
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    );

    ///////////////////////////////////////////////////////////////////////////

#if !PLATFORM_COMPACTFRAMEWORK
    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
#endif
    [return: MarshalAs(UnmanagedType.I4)]
    public delegate bool xEof(
    public delegate int xEof(
        IntPtr pCursor
    );

    ///////////////////////////////////////////////////////////////////////////

#if !PLATFORM_COMPACTFRAMEWORK
    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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    );

    ///////////////////////////////////////////////////////////////////////////

#if !PLATFORM_COMPACTFRAMEWORK
    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
#endif
    [return: MarshalAs(UnmanagedType.I4)]
    public delegate bool xFindFunction(
    public delegate int xFindFunction(
        IntPtr pVtab,
        int nArg,
        IntPtr zName,
        ref SQLiteCallback callback,
        ref IntPtr pUserData
    );
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