Function SwapSaveState

src/state.cpp:1063–1101

}

void SwapSaveState()
{
	//--------------------------------------------------------------------------------------------
	//Both files must exist
	//--------------------------------------------------------------------------------------------

	if (lastSavestateMade.empty())
	{
		FCEUI_DispMessage("Can't Undo",0);
		FCEUI_printf("Undo savestate was attempted but unsuccessful because there was not a recently used savestate.\n");
		return;		//If there is no last savestate, can't undo
	}
	string backup = GenerateBackupSaveStateFn(lastSavestateMade.c_str());	//Get filename of backup state
	if (!CheckFileExists(backup.c_str()))
	{
		FCEUI_DispMessage("Can't Undo",0);
		FCEUI_printf("Undo savestate was attempted but unsuccessful because there was not a backup of the last used savestate.\n");
		return;		//If no backup, can't undo
	}

	//--------------------------------------------------------------------------------------------
	//So both exists, now swap the last savestate and its backup
	//--------------------------------------------------------------------------------------------
	string temp = backup;					//Put backup filename in temp
	temp.append("x");						//Add x

	rename(backup.c_str(),temp.c_str());			//rename backup file to temp file
	rename(lastSavestateMade.c_str(),backup.c_str());	//rename current as backup
	rename(temp.c_str(),lastSavestateMade.c_str());		//rename backup as current

	undoSS = true;	//Just in case, if this was run, then there is definately a last savestate and backup
	if (redoSS)				//This was a redo function, so if run again it will be an undo again
		redoSS = false;
	else					//This was an undo function so next will be redo, so flag it
		redoSS = true;

	FCEUI_DispMessage("%s restored",0,backup.c_str());
	FCEUI_printf("%s restored\n",backup.c_str());
}

//------------------------------------------------------------------------------------------------------------------------------------------------------
//*************************************************************************