http.c: use strbuf API in quote_ref_url

In addition, ''quote_ref_url'' inserts a slash between the base URL and
remote ref path only if needed. Previously, this insertion wasn't
contingent on the lack of a separating slash.

Signed-off-by: Tay Ray Chuan <rctay89@gmail.com>
Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/http.c b/http.c
index ee58799ca8cd433218ca7d40946580732a9010e7..56f18f1b03984ac3a81cb357751e2ae4fce269e0 100644 (file)
--- a/http.c
+++ b/http.c
@@ -573,31 +573,21 @@ static inline int hex(int v)
 
 static char *quote_ref_url(const char *base, const char *ref)
 {
+       struct strbuf buf = STRBUF_INIT;
        const char *cp;
-       char *dp, *qref;
-       int len, baselen, ch;
+       int ch;
 
-       baselen = strlen(base);
-       len = baselen + 2; /* '/' after base and terminating NUL */
-       for (cp = ref; (ch = *cp) != 0; cp++, len++)
+       strbuf_addstr(&buf, base);
+       if (buf.len && buf.buf[buf.len - 1] != '/' && *ref != '/')
+               strbuf_addstr(&buf, "/");
+
+       for (cp = ref; (ch = *cp) != 0; cp++)
                if (needs_quote(ch))
-                       len += 2; /* extra two hex plus replacement % */
-       qref = xmalloc(len);
-       memcpy(qref, base, baselen);
-       dp = qref + baselen;
-       *(dp++) = '/';
-       for (cp = ref; (ch = *cp) != 0; cp++) {
-               if (needs_quote(ch)) {
-                       *dp++ = '%';
-                       *dp++ = hex((ch >> 4) & 0xF);
-                       *dp++ = hex(ch & 0xF);
-               }
+                       strbuf_addf(&buf, "%%%02x", ch);
                else
-                       *dp++ = ch;
-       }
-       *dp = 0;
+                       strbuf_addch(&buf, *cp);
 
-       return qref;
+       return strbuf_detach(&buf, NULL);
 }
 
 int http_fetch_ref(const char *base, struct ref *ref)