- add missed files

src/engine/helper/HL_File.h

@@ -0,0 +1,18 @@
+#ifndef __HL_FILE_H
+#define __HL_FILE_H
+
+#include <string>
+
+class FileHelper
+{
+public:
+    static bool exists(const std::string& s);
+    static bool exists(const char* s);
+
+    static void remove(const std::string& s);
+    static void remove(const char* s);
+
+    static std::string gettempname();
+};
+
+#endif