lib/tea-macro/tea-macro.js
function readFileSync_(path){
	if(file_values_[path]){
		return file_values_[path];
	}
	try {
		file_values_[path]=fs.readFileSync(path,'utf-8');
		return file_values_[path];
	}catch(e){
		return null;
	}
}
function readFileSync_(path){
	if(file_values_[path]){
		return file_values_[path];
	}
	try {
		file_values_[path]=fs.readFileSync(path,'utf-8');
		return file_values_[path];
	}catch(e){
		return null;
	}
}
function readFileSync_ ( path ) { if ( file_values_ [ path ] ) { return file_values_ [ path ] ; } try { file_values_ [ path ] = fs . readFileSync ( path , 'utf-8' ) ; return file_values_ [ path ] ; } catch ( e ) { return null ; } }
read file with cache
@param path  file path
@return      file buffer
read file with cache