From 47f18ac39a313cf213b43320557239c5d0855a11 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Wed, 13 Nov 2002 08:47:19 +0000
Subject: [PATCH] ABS should be a macro.

---
 lib/birdlib.h       | 1 +
 proto/ospf/lsalib.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/birdlib.h b/lib/birdlib.h
index fc27db9b..1904d666 100644
--- a/lib/birdlib.h
+++ b/lib/birdlib.h
@@ -19,6 +19,7 @@
 
 #define MIN(a,b) (((a)<(b))?(a):(b))
 #define MAX(a,b) (((a)>(b))?(a):(b))
+#define ABS(a)   ((a)>=0 ? (a) : -(a))
 #define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a)))
 
 #ifndef NULL
diff --git a/proto/ospf/lsalib.c b/proto/ospf/lsalib.c
index 46dc707a..cf45fd4e 100644
--- a/proto/ospf/lsalib.c
+++ b/proto/ospf/lsalib.c
@@ -399,7 +399,7 @@ lsa_comp(struct ospf_lsa_header *l1, struct ospf_lsa_header *l2)
   if((l1->age==LSA_MAXAGE)&&(l2->age!=LSA_MAXAGE)) return CMP_NEWER;
   if((l2->age==LSA_MAXAGE)&&(l1->age!=LSA_MAXAGE)) return CMP_OLDER;
 
-  if(abs(l1->age-l2->age)>LSA_MAXAGEDIFF)
+  if(ABS(l1->age-l2->age)>LSA_MAXAGEDIFF)
     return l1->age<l2->age ? CMP_NEWER : CMP_OLDER;
 
   return CMP_SAME;