http-walker: simplify process_alternates_response() using strbuf

Use strbuf to build the new base, which takes care of allocations and
the terminating NUL character automatically.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/http-walker.c b/http-walker.c
index dbddfaa1773265a2917d4715158f16845d7139e5..88da5468e77f5a543edb7583e2846f19eb509653 100644 (file)
--- a/http-walker.c
+++ b/http-walker.c
@@ -230,7 +230,6 @@ static void process_alternates_response(void *callback_data)
                        int okay = 0;
                        int serverlen = 0;
                        struct alt_base *newalt;
-                       char *target = NULL;
                        if (data[i] == '/') {
                                /*
                                 * This counts
@@ -287,17 +286,15 @@ static void process_alternates_response(void *callback_data)
                        }
                        /* skip "objects\n" at end */
                        if (okay) {
-                               target = xmalloc(serverlen + posn - i - 6);
-                               memcpy(target, base, serverlen);
-                               memcpy(target + serverlen, data + i,
-                                      posn - i - 7);
-                               target[serverlen + posn - i - 7] = 0;
+                               struct strbuf target = STRBUF_INIT;
+                               strbuf_add(&target, base, serverlen);
+                               strbuf_add(&target, data + i, posn - i - 7);
                                if (walker->get_verbosely)
-                                       fprintf(stderr,
-                                               "Also look at %s\n", target);
+                                       fprintf(stderr, "Also look at %s\n",
+                                               target.buf);
                                newalt = xmalloc(sizeof(*newalt));
                                newalt->next = NULL;
-                               newalt->base = target;
+                               newalt->base = strbuf_detach(&target, NULL);
                                newalt->got_indices = 0;
                                newalt->packs = NULL;