From: eck <none@none>
Date: Tue, 28 Aug 1990 14:03:24 +0000 (+0000)
Subject: fixed qsort() for 0 elements
X-Git-Tag: release-5-5~1581
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=4ab420fb0f00a8d27e63b3ef71c8baf933181956;p=ack.git

fixed qsort() for 0 elements
---

diff --git a/lang/cem/libcc.ansi/stdlib/qsort.c b/lang/cem/libcc.ansi/stdlib/qsort.c
index 765252a31..c9b2d33c4 100644
--- a/lang/cem/libcc.ansi/stdlib/qsort.c
+++ b/lang/cem/libcc.ansi/stdlib/qsort.c
@@ -15,6 +15,8 @@ void
 qsort(void *base, size_t nel, size_t width,
       int (*compar)(const void *, const void *))
 {
+	/* when nel is 0, the expression '(nel - 1) * width' is wrong */
+	if (!nel) return;
 	qcompar = (int (*)(const char *, const char *)) compar;
 	qsort1(base, (char *)base + (nel - 1) * width, width);
 }