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Added support for loading extensions (e.g. mod_spatialite) #1283

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Added support for loading extensions (e.g. mod_spatialite) #1283

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e7b12f6
Added support for loading extensions (e.g. mod_spatialite)
gentledepp Aug 22, 2025
147694d
fixed tests (by default they fail with "unable to find dll sqlite3")
Aug 27, 2025
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35 changes: 35 additions & 0 deletions src/SQLite.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -706,6 +706,28 @@ public void EnableLoadExtension (bool enabled)
throw SQLiteException.New (r, msg);
}
}

/// <summary>
/// Load extension.
/// </summary>
public void LoadExtension (string filename)
{
SQLite3.Result r = SQLite3.LoadExtension (Handle, filename, null, out var msg);
if (r != SQLite3.Result.OK) {
throw SQLiteException.New (r, msg);
}
}

/// <summary>
/// Load extension.
/// </summary>
public void LoadExtension (string filename, string customInitFunctionName)
{
SQLite3.Result r = SQLite3.LoadExtension (Handle, filename, customInitFunctionName, out var msg);
if (r != SQLite3.Result.OK) {
throw SQLiteException.New (r, msg);
}
}

#if !USE_SQLITEPCL_RAW
static byte[] GetNullTerminatedUtf8 (string s)
Expand Down Expand Up @@ -5050,6 +5072,9 @@ public enum ConfigOption : int
[DllImport(LibraryPath, EntryPoint = "sqlite3_enable_load_extension", CallingConvention=CallingConvention.Cdecl)]
public static extern Result EnableLoadExtension (IntPtr db, int onoff);

[DllImport (LibraryPath, EntryPoint = "sqlite3_load_extension", CallingConvention = CallingConvention.Cdecl)]
public static extern Result LoadExtension (IntPtr db, [MarshalAs (UnmanagedType.LPStr)] string filename, [MarshalAs (UnmanagedType.LPStr)] string initFunctionName, [MarshalAs(UnmanagedType.LPStr)] out string errorMsg);

[DllImport(LibraryPath, EntryPoint = "sqlite3_close", CallingConvention=CallingConvention.Cdecl)]
public static extern Result Close (IntPtr db);

Expand Down Expand Up @@ -5401,6 +5426,16 @@ public static Result EnableLoadExtension (Sqlite3DatabaseHandle db, int onoff)
{
return (Result)Sqlite3.sqlite3_enable_load_extension (db, onoff);
}

public static Result LoadExtension (Sqlite3DatabaseHandle db, string fileName, string initFunctionName, out string errorMessage)
{
var result = (Result)Sqlite3.sqlite3_load_extension (db, SQLitePCL.utf8z.FromString (fileName),
SQLitePCL.utf8z.FromString (initFunctionName), out SQLitePCL.utf8z pzErrMsg);

errorMessage = pzErrMsg.utf8_to_string ();

return result;
}

public static int LibVersionNumber ()
{
Expand Down
9 changes: 9 additions & 0 deletions tests/SQLite.Tests/SQLite.Tests.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -12,8 +12,17 @@
<PackageReference Include="NUnit" Version="3.12.0" />
<PackageReference Include="NUnit3TestAdapter" Version="3.16.1" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
<PackageReference Include="SourceGear.sqlite3" Version="3.50.3" />
<PackageReference Include="SQLitePCLRaw.config.e_sqlite3" Version="3.0.1" />
</ItemGroup>

<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<DefineConstants>USE_SQLITEPCL_RAW;RELEASE</DefineConstants>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DefineConstants>USE_SQLITEPCL_RAW;DEBUG</DefineConstants>
</PropertyGroup>

<ItemGroup>
<Compile Include="..\..\src\SQLite.cs">
<Link>SQLite.cs</Link>
Expand Down