Function Cvar_Update

code/qcommon/cvar.cpp:1313–1337

===================== Cvar_Update updates an interpreted modules' version of a cvar ===================== */

=====================
*/
void	Cvar_Update( vmCvar_t *vmCvar ) {
	cvar_t	*cv = NULL;
	assert(vmCvar);

	if ( (unsigned)vmCvar->handle >= (unsigned)cvar_numIndexes ) {
		Com_Error( ERR_DROP, "Cvar_Update: handle %u out of range", (unsigned)vmCvar->handle );
	}

	cv = cvar_indexes + vmCvar->handle;

	if ( cv->modificationCount == vmCvar->modificationCount ) {
		return;
	}
	if ( !cv->string ) {
		return;		// variable might have been cleared by a cvar_restart
	}
	vmCvar->modificationCount = cv->modificationCount;
	if ( strlen(cv->string)+1 > MAX_CVAR_VALUE_STRING )
	  Com_Error( ERR_DROP, "Cvar_Update: src %s length %u exceeds MAX_CVAR_VALUE_STRING",
		     cv->string,
		     (unsigned int) strlen(cv->string));
	Q_strncpyz( vmCvar->string, cv->string, MAX_CVAR_VALUE_STRING );
	vmCvar->value = cv->value;
	vmCvar->integer = cv->integer;
}

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