private void WriteFunction(CXCursor cursor, string prefixStrip)
{
var functionType = clang.getCursorType(cursor);
var functionName = clang.getCursorSpelling(cursor).ToString();
var resultType = clang.getCursorResultType(cursor);
_tw.WriteLine($@"[DllImport({_libraryVarName}, " +
$@"EntryPoint = ""{functionName}"", " +
$@"CallingConvention = {functionType.CallingConventionSpelling()}, CharSet = CharSet.Ansi)]");
if (resultType.IsPtrToConstChar())
{
_tw.WriteLine(@"[return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(ConstCharPtrMarshaler))]");
}
_tw.Write(@"public static extern ");
FunctionHelper.WriteReturnType(resultType, _tw);
if (functionName.StartsWith(prefixStrip))
{
functionName = functionName.Substring(prefixStrip.Length);
}
_tw.Write(@" " + functionName + @"(");
var numArgTypes = clang.getNumArgTypes(functionType);
for (uint i = 0; i < numArgTypes; ++i)
{
FunctionHelper.WriteArgument(functionType, clang.Cursor_getArgument(cursor, i), _tw, i);
}
_tw.WriteLine(@");");
_tw.WriteLine();
}
public CXChildVisitResult Visit(CXCursor cursor, CXCursor parent, IntPtr data)
{
if (cursor.IsInSystemHeader())
{
return(CXChildVisitResult.CXChildVisit_Continue);
}
var cursorKind = clang.getCursorKind(cursor);
if (cursorKind == CXCursorKind.CXCursor_TypedefDecl)
{
var spelling = clang.getCursorSpelling(cursor).ToString();
if (m_visitedTypeDefs.Contains(spelling))
{
return(CXChildVisitResult.CXChildVisit_Continue);
}
m_visitedTypeDefs.Add(spelling);
var type = clang.getCanonicalType(clang.getTypedefDeclUnderlyingType(cursor));
// we handle enums and records in struct and enum visitors with forward declarations also
if (type.kind == CXTypeKind.CXType_Record || type.kind == CXTypeKind.CXType_Enum)
{
return(CXChildVisitResult.CXChildVisit_Continue);
}
// no idea what this is? -- template stuff?
if (type.kind == CXTypeKind.CXType_Unexposed)
{
var canonical = clang.getCanonicalType(type);
if (canonical.kind == CXTypeKind.CXType_Unexposed)
{
return(CXChildVisitResult.CXChildVisit_Continue);
}
}
if (type.kind == CXTypeKind.CXType_Pointer)
{
var pointee = clang.getPointeeType(type);
if (pointee.kind == CXTypeKind.CXType_Record || pointee.kind == CXTypeKind.CXType_Void)
{
m_tw.WriteLine(@"public partial struct " + spelling);
m_tw.WriteLine(@"{");
m_tw.WriteLine(@" public " + spelling + @"(IntPtr pointer)");
m_tw.WriteLine(@" {");
m_tw.WriteLine(@" this.Pointer = pointer;");
m_tw.WriteLine(@" }");
m_tw.WriteLine();
m_tw.WriteLine(@" public IntPtr Pointer;");
m_tw.WriteLine(@"}");
m_tw.WriteLine();
return(CXChildVisitResult.CXChildVisit_Continue);
}
if (pointee.kind == CXTypeKind.CXType_FunctionProto)
{
m_tw.WriteLine(@"[UnmanagedFunctionPointer(" + pointee.CallingConventionSpelling() + ")]");
m_tw.Write(@"public unsafe delegate ");
FunctionHelper.WriteReturnType(clang.getResultType(pointee), m_tw);
m_tw.Write(@" ");
m_tw.Write(spelling);
m_tw.Write(@"(");
uint argumentCounter = 0;
clang.visitChildren(cursor, delegate(CXCursor cxCursor, CXCursor parent1, IntPtr ptr)
{
if (cxCursor.kind == CXCursorKind.CXCursor_ParmDecl)
{
FunctionHelper.WriteArgument(pointee, cxCursor, m_tw, argumentCounter++);
}
return(CXChildVisitResult.CXChildVisit_Continue);
}, new CXClientData(IntPtr.Zero));
m_tw.WriteLine(@");");
m_tw.WriteLine();
return(CXChildVisitResult.CXChildVisit_Continue);
}
}
if (clang.isPODType(type) != 0)
{
var podType = type.ToPlainTypeString();
m_tw.WriteLine(@"public partial struct " + spelling);
m_tw.WriteLine(@"{");
m_tw.WriteLine(@" public " + spelling + @"(" + podType + @" value)");
m_tw.WriteLine(@" {");
m_tw.WriteLine(@" this.Value = value;");
m_tw.WriteLine(@" }");
m_tw.WriteLine();
m_tw.WriteLine(@" public " + type.ToPlainTypeString() + @" Value;");
m_tw.WriteLine(@"}");
m_tw.WriteLine();
}
return(CXChildVisitResult.CXChildVisit_Continue);
}
return(CXChildVisitResult.CXChildVisit_Recurse);
}