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authorPavel Machek <pavel@ucw.cz>1998-07-09 21:35:23 +0200
committerPavel Machek <pavel@ucw.cz>1998-07-09 21:35:23 +0200
commitaea2dcabdc4ed80172ac8d4f5c4d31bc8607d1e7 (patch)
tree641f1ceb251e572d2e1b69cba9532d8767d027bb
parent962ba482fd7bba97cf13a96105503efff4dcb88a (diff)
downloadbird-aea2dcabdc4ed80172ac8d4f5c4d31bc8607d1e7.tar
bird-aea2dcabdc4ed80172ac8d4f5c4d31bc8607d1e7.zip
Adding walk list which permits you to delete entries.
-rw-r--r--lib/lists.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/lists.h b/lib/lists.h
index 3230724..ae02ad4 100644
--- a/lib/lists.h
+++ b/lib/lists.h
@@ -20,8 +20,14 @@ typedef struct list { /* In fact two overlayed nodes */
#define NODE (node *)
#define HEAD(list) ((void *)((list).head))
#define TAIL(list) ((void *)((list).tail))
-#define WALK_LIST(n,list) for((n)=HEAD(list);(NODE (n))->next; \
+#define WALK_LIST(n,list) for((NODE (n))=HEAD(list);(NODE (n))->next; \
n=(void *)((NODE (n))->next))
+#define WALK_LIST_DELSAFE(n,ne,list) \
+ if ( ((NODE n) = HEAD(list)) ) \
+ for( (NODE ne) = (NODE n)->next; \
+ ne; \
+ (NODE ne) = (NODE (n=ne))->next )
+
#define EMPTY_LIST(list) (!(list).head->next)
void add_tail(list *, node *);