Example #1
0
static idStr R_LoadPreprocessed( const idStr& filename, idList<idStr>& previoulsyLoadedFiles, idList<idStr>& includeStack ) {
	includeStack.Append( filename );
	previoulsyLoadedFiles.Append( filename );

	const int fileIndex = previoulsyLoadedFiles.Num() - 1;
	
	idStr content = R_ReadFile(filename.c_str());
	idStr ret;

	fhStrRef ptr = fhStrRef( content.c_str(), content.Length() );
	fhStrRef remaining = ptr;

	int currentLine = 1;
	int currentColumn = 1;
	bool isLineComment = false;

	for (; !ptr.IsEmpty(); ++ptr) {

		if (ptr[0] == '\n')	{
			++currentLine;
			currentColumn = 1;
			isLineComment = false;
			continue;
		}

		if (isLineComment) {
			continue;
		}

		if (ptr.StartsWith( "//" )) {
			isLineComment = true;
			continue;
		}

		static const fhStrRef includeDirective = "#include \"";
		if (currentColumn == 1 && ptr.StartsWith( includeDirective )) {
			fhStrRef includeFilename = ptr.Substr( includeDirective.Length() );
			for (int i = 0; i < includeFilename.Length() + 1; ++i) {
				if (i == includeFilename.Length())
					throw fhParseException( filename, currentLine, currentColumn, "unexpected end-of-file in preprocessor include" );

				if (includeFilename[i] == '\n')
					throw fhParseException( filename, currentLine, currentColumn, "unexpected end-of-line in preprocessor include" );

				if (includeFilename[i] == '"') {
					includeFilename = includeFilename.Substr( 0, i );
					break;
				}
			}

			if (includeFilename.IsEmpty())
				throw fhParseException( filename, currentLine, currentColumn, "empty filename in preprocessor include" );

			if (includeStack.FindIndex( includeFilename.ToString() ) >= 0)
				throw fhParseException( filename, currentLine, currentColumn, "circular preprocessor include" );

			idStr includeContent;
			//try to load included shader relative to current file. If that fails try to load included shader from root directory.
			try	{
				idStr includeFilePath;
				filename.ExtractFilePath(includeFilePath);				
				includeFilePath.AppendPath( includeFilename.c_str(), includeFilename.Length() );

				includeContent = R_LoadPreprocessed( includeFilePath, previoulsyLoadedFiles, includeStack );
				ret.Append( remaining.c_str(), ptr.c_str() - remaining.c_str() );
				ret.Append( includeContent );
				//ret.Append( "\n#line " + toString( currentLine + 1 ) + " \"" + filename + "\"" );
			} catch (const fhFileNotFoundException& e) {				
				try	{
					includeContent = R_LoadPreprocessed( includeFilename.ToString(), previoulsyLoadedFiles, includeStack );
					ret.Append( remaining.c_str(), ptr.c_str() - remaining.c_str() );
					ret.Append( includeContent );
					//ret.append( "\n#line " + ToString( currentLine + 1 ) + " \"" + filename + "\"" );
				} catch (const fhFileNotFoundException& e) {
					throw fhParseException( filename, currentLine, currentColumn, idStr( "include file not found: " ) + includeFilename.ToString() );
				}
			}

			//skip rest of the line
			while (!ptr.IsEmpty() && ptr[0] != '\n') {
				++ptr;
			}

			++currentLine;
			currentColumn = 1;
			remaining = ptr;

			continue;
		}

		currentColumn++;
	}

	ret.Append( remaining.ToString() );
	includeStack.RemoveIndex(includeStack.Num() - 1);
	return ret;
}