134 /**

   135  * Removes duplicates from lists of GRFConfigs. These duplicates

   136  * are introduced when the _grfconfig_static GRFs are appended

   137  * to the _grfconfig on a newgame or savegame. As the parameters

   138  * of the static GRFs could be different that the parameters of

   139  * the ones used non-statically. This can result in desyncs in

   140  * multiplayers, so the duplicate static GRFs have to be removed.

   141  *

   142  * This function _assumes_ that all static GRFs are placed after

   143  * the non-static GRFs.

   144  *

   145  * @param list the list to remove the duplicates from

   146  */

   147 static void RemoveDuplicatesFromGRFConfigList(GRFConfig *list)

   148 {

   149 	GRFConfig *prev;

   150 	GRFConfig *cur;

   151 

   152 	if (list == NULL) return;

   153 

   154 	for (prev = list, cur = list->next; cur != NULL; prev = cur, cur = cur->next) {

   155 		if (cur->grfid != list->grfid) continue;

   156 		assert(HASBIT(cur->flags, GCF_STATIC));

   157 		prev->next = cur->next;

   158 		ClearGRFConfig(&cur);

   159 		cur = prev; // Just go back one so it continues as normal later on

   160 	}

   161 

   162 	RemoveDuplicatesFromGRFConfigList(list->next);

   163 }

   164 

   165 /**

   166  * Appends the static GRFs to a list of GRFs

   167  * @param dst the head of the list to add to

   168  */

   169 void AppendStaticGRFConfigs(GRFConfig **dst)

   170 {

   171 	GRFConfig **tail = dst;

   172 	while (*tail != NULL) tail = &(*tail)->next;

   173 

   174 	CopyGRFConfigList(tail, _grfconfig_static);

   175 	RemoveDuplicatesFromGRFConfigList(*dst);

   176 }

   177 

   447 	AppendStaticGRFConfigs(&_grfconfig);