improved virtual buttons for touch devices (Android)

[rocksndiamonds.git] / src / libgame / misc.c

diff --git a/src/libgame/misc.c b/src/libgame/misc.c
index be7fdc38e7819f5077fcfa223107d55081d511b2..3bc3299f2c70fcb5ad5427f2709021bdaa66d838 100644 (file)
--- a/src/libgame/misc.c
+++ b/src/libgame/misc.c
@@ -2068,20 +2068,33 @@ void deleteNodeFromList(ListNode **node_first, char *key,
 
   if (strEqual((*node_first)->key, key))
   {
-    checked_free((*node_first)->key);
+    // after first recursion, (*node_first)->prev->next == *node_first,
+    // so *node_first would be overwritten with (*node_first)->next
+    // => use a copy of *node_first (and later of (*node_first)->next)
+    ListNode *node = *node_first;
+    ListNode *node_next = node->next;
+
+    checked_free(node->key);
 
     if (destructor_function)
-      destructor_function((*node_first)->content);
+      destructor_function(node->content);
+
+    if (node->prev)
+      node->prev->next = node->next;
 
-    if ((*node_first)->next)
-      (*node_first)->next->prev = (*node_first)->prev;
+    if (node->next)
+      node->next->prev = node->prev;
 
-    checked_free(*node_first);
+    checked_free(node);
 
-    *node_first = (*node_first)->next;
+    // after removing node, set list pointer to next valid list node
+    // (this is important if the first node of the list was deleted)
+    *node_first = node_next;
   }
   else
+  {
     deleteNodeFromList(&(*node_first)->next, key, destructor_function);
+  }
 }
 
 ListNode *getNodeFromKey(ListNode *node_first, char *key)
@@ -3082,7 +3095,7 @@ static void LoadArtworkConfigFromFilename(struct ArtworkListInfo *artwork_info,
   }
   END_HASH_ITERATION(valid_file_hash_tmp, itr)
 
-    /* free temporary hash used for iteration */
+  /* free temporary hash used for iteration */
   freeSetupFileHash(valid_file_hash_tmp);
 
   /* read parameters for all known config file tokens */