From e4c22cea6b0efa0e17ee4dbee773d432056c1a9f Mon Sep 17 00:00:00 2001
From: "Kevin P. Fleming" <kpfleming@digium.com>
Date: Fri, 17 Jun 2005 14:27:57 +0000
Subject: [PATCH] don't let ast_trim_blanks operate on empty strings or run off
the beginning of the string
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5929 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
utils.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/utils.c b/utils.c
index 7f50c7be85..776853816a 100755
--- a/utils.c
+++ b/utils.c
@@ -46,13 +46,15 @@ char *ast_skip_blanks(char *str)
char *ast_trim_blanks(char *str)
{
- if (str) {
- str += strlen(str) - 1;
- while (*str && *str < 33)
- str--;
- *(++str) = '\0'; /* terminate string */
+ char *work = str;
+
+ if (work && !ast_strlen_zero(work)) {
+ work += strlen(work) - 1;
+ while ((work >= str) && *work && *work < 33)
+ work--;
+ *(++work) = '\0'; /* terminate string */
}
- return str;
+ return work;
}
char *ast_skip_nonblanks(char *str)
--
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