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urlmatch.c: recompute pointer after append_normalized_escapes

When append_normalized_escapes is called, its internal strbuf_add* calls can
cause the strbuf's buf to be reallocated changing the value of the buf pointer.

Do not use the strbuf buf pointer from before any append_normalized_escapes
calls afterwards.  Instead recompute the needed pointer.

Signed-off-by: Thomas Rast <trast@inf.ethz.ch>
Signed-off-by: Kyle J. McKay <mackyle@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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commit a7f0a0efa5aa2459e284a2aa5a217324bf9d3875 1 parent 6667a6a
Thomas Rast authored gitster committed
Showing with 5 additions and 1 deletion.
  1. +5 −1 urlmatch.c
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6 urlmatch.c
@@ -281,9 +281,11 @@ char *url_normalize(const char *url, struct url_info *out_info)
url_len--;
}
for (;;) {
- const char *seg_start = norm.buf + norm.len;
+ const char *seg_start;
+ size_t seg_start_off = norm.len;
const char *next_slash = url + strcspn(url, "/?#");
int skip_add_slash = 0;
+
/*
* RFC 3689 indicates that any . or .. segments should be
* unescaped before being checked for.
@@ -297,6 +299,8 @@ char *url_normalize(const char *url, struct url_info *out_info)
strbuf_release(&norm);
return NULL;
}
+
+ seg_start = norm.buf + seg_start_off;
if (!strcmp(seg_start, ".")) {
/* ignore a . segment; be careful not to remove initial '/' */
if (seg_start == path_start + 1) {
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