-// returns the file size
-// return -1 if file is not present
-// the file should be in BINARY mode for stupid OSs that care
-int Sys_FileOpenRead (char *path, int *hndl);
-
-int Sys_FileOpenWrite (char *path);
-void Sys_FileClose (int handle);
-void Sys_FileSeek (int handle, int position);
-int Sys_FileRead (int handle, void *dest, int count);
-int Sys_FileWrite (int handle, void *data, int count);
-int Sys_FileTime (char *path);
-void Sys_mkdir (char *path);