From: Emden Gansner <erg@research.att.com>
Date: Wed, 27 Jun 2012 18:49:59 +0000 (-0400)
Subject: Add macro for safe edge comparison
X-Git-Tag: LAST_LIBGRAPH~32^2~391^2~3^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d6cefefbf3fbf456e77eb8605727e4a18a545bfa;p=graphviz

Add macro for safe edge comparison
---

diff --git a/lib/cgraph/cgraph.h b/lib/cgraph/cgraph.h
index ee58898c1..c7f5db145 100644
--- a/lib/cgraph/cgraph.h
+++ b/lib/cgraph/cgraph.h
@@ -412,6 +412,7 @@ extern agusererrf agseterrf(agusererrf);
 #define agtail(e)		AGTAIL(e)
 #define aghead(e)		AGHEAD(e)
 #define agopp(e)		AGOPP(e)
+#define ageqedge(e,f)		(AGMKOUT(e) == AGMKOUT(f))
 
 #define TAILPORT_ID		"tailport"
 #define HEADPORT_ID		"headport"