From: ceriel <none@none>
Date: Thu, 11 Dec 1986 17:04:40 +0000 (+0000)
Subject: Improved testing for 0-strings in the routine "mycat".
X-Git-Tag: release-5-5~5094
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=9e6fe01229e0ef4c0de5746f988f6a3c79b2f792;p=ack.git

Improved testing for 0-strings in the routine "mycat".
---

diff --git a/mach/proto/ncg/compute.c b/mach/proto/ncg/compute.c
index c86e073d3..d023fd892 100644
--- a/mach/proto/ncg/compute.c
+++ b/mach/proto/ncg/compute.c
@@ -86,8 +86,8 @@ string salloc(),strcpy(),strcat();
 string mycat(s1,s2) register string s1,s2; {
 	register string s;
 
-	if (s1==0) return(s2);
-	if (s2==0) return(s1);
+	if (s1==0 || *s1=='\0') return(s2);
+	if (s2==0 || *s2=='\0') return(s1);
 	s=salloc(strlen(s1)+strlen(s2)+1);
 	strcpy(s,s1);
 	strcat(s,"+");