Function Cvar_Toggle_f

code/qcommon/cvar.cpp:855–889

============ Cvar_Toggle_f Toggles a cvar for easy single key binding, optionally through a list of given values ============ */

============
*/
void Cvar_Toggle_f( void ) {
	int		i, c = Cmd_Argc();
	char		*curval;

	if(c < 2) {
		Com_Printf("usage: toggle <variable> [value1, value2, ...]\n");
		return;
	}

	if(c == 2) {
		Cvar_Set2(Cmd_Argv(1), va("%d",
			!Cvar_VariableValue(Cmd_Argv(1))),
			qfalse);
		return;
	}

	if(c == 3) {
		Com_Printf("toggle: nothing to toggle to\n");
		return;
	}

	curval = Cvar_VariableString(Cmd_Argv(1));

	// don't bother checking the last arg for a match since the desired
	// behaviour is the same as no match (set to the first argument)
	for(i = 2; i + 1 < c; i++) {
		if(strcmp(curval, Cmd_Argv(i)) == 0) {
			Cvar_Set2(Cmd_Argv(1), Cmd_Argv(i + 1), qfalse);
			return;
		}
	}

	// fallback
	Cvar_Set2(Cmd_Argv(1), Cmd_Argv(2), qfalse);
}

/*
============