Function CreateBackupSaveState

src/state.cpp:1054–1061

void CreateBackupSaveState(const char *fname)
{
	string newFilename = GenerateBackupSaveStateFn(fname);	//Get backup savestate filename
	if (CheckFileExists(newFilename.c_str()))				//See if backup already exists
		remove(newFilename.c_str())	;						//If so, delete it
	rename(fname,newFilename.c_str());						//Rename savestate to backup filename
	undoSS = true;		//There is a backup savestate file to mast last loaded, so undo is possible
}

void SwapSaveState()
{