From b6628a8c98fa53c1b293221ad0f7e0611cb0b76d Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Tue, 3 Aug 1999 19:31:30 +0000
Subject: [PATCH] Added macros for walking lists backwards.
---
lib/lists.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/lib/lists.h b/lib/lists.h
index 2d91ca555..acab292e9 100644
--- a/lib/lists.h
+++ b/lib/lists.h
@@ -24,6 +24,10 @@ typedef struct list { /* In fact two overlayed nodes */
n=(void *)((NODE (n))->next))
#define WALK_LIST_DELSAFE(n,nxt,list) \
for(n=HEAD(list); nxt=(void *)((NODE (n))->next); n=(void *) nxt)
+#define WALK_LIST_BACKWARDS(n,list) for(n=TAIL(list);(NODE (n))->prev; \
+ n=(void *)((NODE (n))->prev))
+#define WALK_LIST_BACKWARDS_DELSAFE(n,prv,list) \
+ for(n=TAIL(list); prv=(void *)((NODE (n))->prev); n=(void *) prv)
#define EMPTY_LIST(list) (!(list).head->next)