X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;ds=sidebyside;f=libbb%2Flast_char_is.c;h=aaa85ddd9c4e9b105964d2f0b38555c7c478a66e;hb=21b080daa8c180a43d10d6b3dee47134ef21e581;hp=ae2d24bf71894d479778cded3ed7643729f661bb;hpb=c911a4389bbaa5ac85d725c8c05e452dfba8583d;p=oweals%2Fbusybox.git

diff --git a/libbb/last_char_is.c b/libbb/last_char_is.c
index ae2d24bf7..aaa85ddd9 100644
--- a/libbb/last_char_is.c
+++ b/libbb/last_char_is.c
@@ -1,36 +1,24 @@
+/* vi: set sw=4 ts=4: */
 /*
  * busybox library eXtended function
  *
  * Copyright (C) 2001 Larry Doolittle, <ldoolitt@recycle.lbl.gov>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
 #include "libbb.h"
 
-/* Find out if the last character of a string matches the one given Don't
- * underrun the buffer if the string length is 0.  Also avoids a possible
- * space-hogging inline of strlen() per usage.
+/* Find out if the last character of a string matches the one given.
+ * Don't underrun the buffer if the string length is 0.
  */
-char * last_char_is(const char *s, int c)
+char* last_char_is(const char *s, int c)
 {
-	char *sret  = (char *)s+strlen(s)-1;
-	if (sret>=s && *sret == c) { 
-		return sret;
-	} else {
-		return NULL;
+	if (s && *s) {
+		size_t sz = strlen(s) - 1;
+		s += sz;
+		if ( (unsigned char)*s == c)
+			return (char*)s;
 	}
+	return NULL;
 }