improved lots of stuff

fpc/library/clang/c_libclang.cpp

@@ -0,0 +1,64 @@
+
+#include "c_libclang.h"
+#include "helper.h"
+#include "tier1/interface.h"
+
+#include "clang-c/Index.h"
+#include <clang-c/CXFile.h>
+#include <clang-c/CXString.h>
+
+class CClangBackend: public IClangBackend
+{
+public:
+	virtual bool AreFileDependenciesUpdated( CUtlString szFile, CUtlString szOutputFile, CUtlVector<CUtlString> arguments ) override;
+
+	bool bAnyOutdated;
+	CUtlString szCurrentFile;
+
+private:
+	static void InclusionVisitor( CXFile included_file, CXSourceLocation *include_stack, unsigned include_len, CXClientData client_data );
+};
+
+EXPOSE_INTERFACE(CClangBackend, IClangBackend, CLANG_BACKEND_INTERFACE_NAME);
+
+bool CClangBackend::AreFileDependenciesUpdated( CUtlString szFile, CUtlString szOutputFile, CUtlVector<CUtlString> arguments )
+{
+	szCurrentFile = szOutputFile;
+	bAnyOutdated = false;
+
+	CUtlVector<const char *> cArguments = {};
+	for (auto &arg: arguments)
+		cArguments.AppendTail(arg);
+
+	CXIndex index = clang_createIndex(0, 0);
+	CXTranslationUnit tu;
+	CXErrorCode err = clang_parseTranslationUnit2(index, szFile.GetString(), cArguments.GetData(), cArguments.GetSize(), NULL, 0, 0, &tu);
+
+	if (err != CXError_Success) {
+		printf("clang_parseTranslationUnit2 failed with error code %d\n", err);
+		return false;
+	}
+
+	clang_getInclusions(tu, CClangBackend::InclusionVisitor, NULL);
+
+	clang_disposeTranslationUnit(tu);
+	clang_disposeIndex(index);
+	return bAnyOutdated;
+}
+	
+void CClangBackend::InclusionVisitor( CXFile included_file, CXSourceLocation *include_stack, unsigned include_len, CXClientData client_data )
+{
+	if (((CClangBackend*)clangbackend)->bAnyOutdated)
+		return;
+	CXString filename = clang_getFileName(included_file);
+
+	bool bUpdate = 
+		filesystem2->ShouldRecompile(clang_getCString(filename), ((CClangBackend*)clangbackend)->szCurrentFile);
+	if (bUpdate)
+	{
+		((CClangBackend*)clangbackend)->bAnyOutdated = true;
+	}
+
+	clang_disposeString(filename);
+}
+