// sys.h -- non-portable functions //// file IO// // returns the file size// return -1 if file is not present// the file should be in BINARY mode for stupid OSs that careint 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); //// system IO//void Sys_DebugLog(char *file, char *fmt, ...); void Sys_Error (char *error, ...);// an error will cause the entire program to exit void Sys_Printf (char *fmt, ...);// send text to the console void Sys_Quit (void); double Sys_FloatTime (void); char *Sys_ConsoleInput (void); void Sys_SendKeyEvents (void);// Perform Key_Event () callbacks until the input que is empty