Missed a common case for needing to extend the buffer.

(closes issue #14716)
 Reported by: sum
 Patches:
       20090402__bug14716.diff.txt uploaded by tilghman (license 14)
 Tested by: sum

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@186021 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/strings.c b/main/strings.c
index aecf4099ec78a8b8c006811ee3663db32efa1c53..2e4b749c97c3deaf71867a54f6bfc08c5f339834 100644 (file)
--- a/main/strings.c
+++ b/main/strings.c
@@ -143,7 +143,8 @@ char *__ast_str_helper2(struct ast_str **buf, size_t maxlen, const char *src, si
                maxlen--;
                (*buf)->__AST_STR_USED++;
 
-               if (dynamic && (!maxlen || (escapecommas && !(maxlen - 1)))) {
+               if ((ptr >= (*buf)->__AST_STR_STR + (*buf)->__AST_STR_LEN - 3) ||
+                       (dynamic && (!maxlen || (escapecommas && !(maxlen - 1))))) {
                        char *oldbase = (*buf)->__AST_STR_STR;
                        size_t old = (*buf)->__AST_STR_LEN;
                        if (ast_str_make_space(buf, (*buf)->__AST_STR_LEN * 2)) {