X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=libavahi-core%2Fllist.h;fp=libavahi-core%2Fllist.h;h=16a16b6f327f65cfb6d8b92a7dba786f6e860e0c;hb=f93eca3530bef2cc23ffe6c3a04493ad171c2aed;hp=0000000000000000000000000000000000000000;hpb=42c9b99f2bb21d0ff1f1918314f9d5dd82a62763;p=catta

diff --git a/libavahi-core/llist.h b/libavahi-core/llist.h
new file mode 100644
index 0000000..16a16b6
--- /dev/null
+++ b/libavahi-core/llist.h
@@ -0,0 +1,50 @@
+#ifndef foollistfoo
+#define foollistfoo
+
+#include <glib.h>
+
+/* Some macros for maintaining doubly linked lists */
+
+/* The head of the linked list. Use this in the structure that shall
+ * contain the head of the linked list */
+#define AVAHI_LLIST_HEAD(t,name) t *name
+
+/* The pointers in the linked list's items. Use this in the item structure */
+#define AVAHI_LLIST_FIELDS(t,name) t *name##_next, *name##_prev
+
+/* Initialize the list's head */
+#define AVAHI_LLIST_HEAD_INIT(t,head) do { (head) = NULL; } while(0)
+
+/* Initialize a list item */
+#define AVAHI_LLIST_INIT(t,name,item) do { \
+                               t *_item = (item); \
+                               g_assert(_item); \
+                               _item->name##_prev = _item->name##_next = NULL; \
+                               } while(0)
+
+/* Prepend an item to the list */
+#define AVAHI_LLIST_PREPEND(t,name,head,item) do { \
+                                        t **_head = &(head), *_item = (item); \
+                                        g_assert(_item); \
+                                        if ((_item->name##_next = *_head)) \
+                                           _item->name##_next->name##_prev = _item; \
+                                        _item->name##_prev = NULL; \
+                                        *_head = _item; \
+                                        } while (0)
+
+/* Remove an item from the list */
+#define AVAHI_LLIST_REMOVE(t,name,head,item) do { \
+                                    t **_head = &(head), *_item = (item); \
+                                    g_assert(_item); \
+                                    if (_item->name##_next) \
+                                       _item->name##_next->name##_prev = _item->name##_prev; \
+                                    if (_item->name##_prev) \
+                                       _item->name##_prev->name##_next = _item->name##_next; \
+                                    else {\
+                                       g_assert(*_head == _item); \
+                                       *_head = _item->name##_next; \
+                                    } \
+                                    _item->name##_next = _item->name##_prev = NULL; \
+                                    } while(0)
+
+#endif