void Cvar_SetValue (char *var_name, float value);
// expands value to a string and calls Cvar_Set
+void Cvar_SetQuick (cvar_t *var, char *value);
+void Cvar_SetValueQuick (cvar_t *var, float value);
+
float Cvar_VariableValue (char *var_name);
// returns 0 if not defined or non numeric