src/keys.c: Use generic list implementation

Be consistent and replace the custom linked list implementation we used
here by the generic list implementation we use everywhere else. This
reduces code complexity, while slightly improving memory overhead.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

src/keys.c

@@ -46,13 +46,7 @@ struct keydef_s {
   char *binding;
 };
 
-struct key_str_s {
+static llist_t keys[NBKEYS];
-  char *str;
-  struct key_str_s *next;
-};
-
-static struct key_str_s *keys[NBKEYS];
-
 static enum key actions[MAXKEYVAL];
 
 static struct keydef_s keydef[NBKEYS] = {
@@ -135,28 +129,25 @@ keys_init (void)
 
   for (i = 0; i < MAXKEYVAL; i++)
     actions[i] = KEY_UNDEF;
-  memset (keys, 0, NBKEYS);
+  for (i = 0; i < NBKEYS; i++)
+    LLIST_INIT (&keys[i]);
+}
+
+static void
+key_free (char *s)
+{
+  mem_free (s);
 }
 
 void
 keys_free (void)
 {
-  struct key_str_s *o, **i;
+  int i;
-  int key;
 
-  for (key = 0; key < NBKEYS; key++)
+  for (i = 0; i < NBKEYS; i++)
     {
-      if (keys[key] == NULL)
+      LLIST_FREE_INNER (&keys[i], key_free);
-        continue;
+      LLIST_FREE (&keys[i]);
-
-      i = &keys[key];
-      while (*i)
-        {
-          o = *i;
-          *i = o->next;
-          mem_free (o->str);
-          mem_free (o);
-        }
     }
 }
 
@@ -226,29 +217,10 @@ keys_getch (WINDOW *win, int *count)
 static void
 add_key_str (enum key action, int key)
 {
-  struct key_str_s *new, **i;
-
   if (action < 0 || action > NBKEYS)
     return;
 
-  new = mem_malloc (sizeof (struct key_str_s));
+  LLIST_ADD (&keys[action], mem_strdup (keys_int2str (key)));
-  new->str = mem_strdup (keys_int2str (key));
-  new->next = NULL;
-  i = &keys[action];
-  for (;;)
-    {
-      if (*i == NULL)
-        {
-          *i = new;
-          break;
-        }
-      else if ((*i)->next == NULL)
-        {
-          (*i)->next = new;
-          break;
-        }
-      i = &(*i)->next;
-    }
 }
 
 int
@@ -268,22 +240,20 @@ keys_assign_binding (int key, enum key action)
 static void
 del_key_str (enum key action, int key)
 {
-  struct key_str_s *old, **i;
+  llist_item_t *i;
   char oldstr[BUFSIZ];
 
   if (action < 0 || action > NBKEYS)
     return;
 
   strncpy (oldstr, keys_int2str (key), BUFSIZ);
-  for (i = &keys[action]; *i; i = &(*i)->next)
+
+  LLIST_FOREACH (&keys[action], i)
     {
-      if (!strcmp ((*i)->str, oldstr))
+      if (strcmp (LLIST_GET_DATA (i), oldstr) == 0)
         {
-          old = *i;
+          LLIST_REMOVE (&keys[action], i);
-          *i = old->next;
+          return;
-          mem_free (old->str);
-          mem_free (old);
-          break;
         }
     }
 }
@@ -291,9 +261,7 @@ del_key_str (enum key action, int key)
 void
 keys_remove_binding (int key, enum key action)
 {
-  if (key < 0 || key > MAXKEYVAL)
+  if (key >= 0 && key <= MAXKEYVAL)
-    return;
-  else
     {
       actions[key] = KEY_UNDEF;
       del_key_str (action, key);
@@ -378,52 +346,43 @@ keys_int2str (int key)
 int
 keys_action_count_keys (enum key action)
 {
-  struct key_str_s *key;
+  llist_item_t *i;
-  int i;
+  int n = 0;
 
-  i = 0;
+  LLIST_FOREACH (&keys[action], i)
-  for (key = keys[action]; key; key = key->next)
+    n++;
-    i++;
 
-  return i;
+  return n;
 }
 
 char *
 keys_action_firstkey (enum key action)
 {
-  return (keys[action] != NULL) ? keys[action]->str : "XXX";
+  char *s = LLIST_GET_DATA (LLIST_FIRST (&keys[action]));
+  return (s != NULL) ? s : "XXX";
 }
 
 char *
 keys_action_nkey (enum key action, int keynum)
 {
-  struct key_str_s *key;
+  return LLIST_GET_DATA (LLIST_NTH (&keys[action], keynum));
-  int i;
-
-  i = 0;
-  for (key = keys[action]; key; key = key->next)
-    {
-      if (i == keynum)
-        return key->str;
-      i++;
-    }
-  return NULL;
 }
 
 char *
 keys_action_allkeys (enum key action)
 {
+  llist_item_t *i;
   static char keystr[BUFSIZ];
-  struct key_str_s *i;
   const char *CHAR_SPACE = " ";
 
-  if (keys[action] == NULL)
+  if (!LLIST_FIRST (&keys[action]))
     return NULL;
+
   keystr[0] = '\0';
-  for (i = keys[action]; i; i = i->next)
+  LLIST_FOREACH (&keys[action], i)
     {
       const int MAXLEN = sizeof (keystr) - 1 - strlen (keystr);
-      strncat (keystr, i->str, MAXLEN - 1);
+      strncat (keystr, LLIST_GET_DATA (i), MAXLEN - 1);
       strncat (keystr, CHAR_SPACE, 1);
     }
 
@@ -624,7 +583,7 @@ keys_check_missing_bindings (void)
 
   for (i = 0; i < NBKEYS; i++)
     {
-      if (keys[i] == NULL)
+      if (!LLIST_FIRST (&keys[i]))
         return 1;
     }
   return 0;
@@ -637,7 +596,7 @@ keys_fill_missing (void)
 
   for (i = 0; i < NBKEYS; i++)
     {
-      if (keys[i] == NULL)
+      if (!LLIST_FIRST (&keys[i]))
         {
           char *p, tmpbuf[BUFSIZ];