Fix hash function in xdiff library

diff --git a/http-fetch.c b/http-fetch.c
index 12493fbed2822ce41b5b4c23fb85d6f4a47c104a..259292d4de4959d29abad60f0c9cbd55e4b9b6d3 100644 (file)
--- a/http-fetch.c
+++ b/http-fetch.c
@@ -36,6 +36,8 @@ enum XML_Status {
 #define PREV_BUF_SIZE 4096
 #define RANGE_HEADER_SIZE 30
 
+static int commits_on_stdin = 0;
+
 static int got_alternates = -1;
 static int corrupt_object_found = 0;
 
@@ -43,7 +45,7 @@ static struct curl_slist *no_pragma_header;
 
 struct alt_base
 {
-       char *base;
+       const char *base;
        int path_len;
        int got_indices;
        struct packed_git *packs;
@@ -81,7 +83,7 @@ struct object_request
 };
 
 struct alternates_request {
-       char *base;
+       const char *base;
        char *url;
        struct buffer *buffer;
        struct active_request_slot *slot;
@@ -142,7 +144,7 @@ static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
        return size;
 }
 
-static void fetch_alternates(char *base);
+static void fetch_alternates(const char *base);
 
 static void process_object_response(void *callback_data);
 
@@ -507,7 +509,7 @@ static void process_alternates_response(void *callback_data)
                (struct alternates_request *)callback_data;
        struct active_request_slot *slot = alt_req->slot;
        struct alt_base *tail = alt;
-       char *base = alt_req->base;
+       const char *base = alt_req->base;
        static const char null_byte = '\0';
        char *data;
        int i = 0;
@@ -557,9 +559,36 @@ static void process_alternates_response(void *callback_data)
                        char *target = NULL;
                        char *path;
                        if (data[i] == '/') {
-                               serverlen = strchr(base + 8, '/') - base;
-                               okay = 1;
+                               /* This counts
+                                * http://git.host/pub/scm/linux.git/
+                                * -----------here^
+                                * so memcpy(dst, base, serverlen) will
+                                * copy up to "...git.host".
+                                */
+                               const char *colon_ss = strstr(base,"://");
+                               if (colon_ss) {
+                                       serverlen = (strchr(colon_ss + 3, '/')
+                                                    - base);
+                                       okay = 1;
+                               }
                        } else if (!memcmp(data + i, "../", 3)) {
+                               /* Relative URL; chop the corresponding
+                                * number of subpath from base (and ../
+                                * from data), and concatenate the result.
+                                *
+                                * The code first drops ../ from data, and
+                                * then drops one ../ from data and one path
+                                * from base.  IOW, one extra ../ is dropped
+                                * from data than path is dropped from base.
+                                *
+                                * This is not wrong.  The alternate in
+                                *     http://git.host/pub/scm/linux.git/
+                                * to borrow from
+                                *     http://git.host/pub/scm/linus.git/
+                                * is ../../linus.git/objects/.  You need
+                                * two ../../ to borrow from your direct
+                                * neighbour.
+                                */
                                i += 3;
                                serverlen = strlen(base);
                                while (i + 2 < posn &&
@@ -581,11 +610,13 @@ static void process_alternates_response(void *callback_data)
                                        okay = 1;
                                }
                        }
-                       /* skip 'objects' at end */
+                       /* skip "objects\n" at end */
                        if (okay) {
                                target = xmalloc(serverlen + posn - i - 6);
-                               strlcpy(target, base, serverlen);
-                               strlcpy(target + serverlen, data + i, posn - i - 6);
+                               memcpy(target, base, serverlen);
+                               memcpy(target + serverlen, data + i,
+                                      posn - i - 7);
+                               target[serverlen + posn - i - 7] = 0;
                                if (get_verbosely)
                                        fprintf(stderr,
                                                "Also look at %s\n", target);
@@ -612,7 +643,7 @@ static void process_alternates_response(void *callback_data)
        got_alternates = 1;
 }
 
-static void fetch_alternates(char *base)
+static void fetch_alternates(const char *base)
 {
        struct buffer buffer;
        char *url;
@@ -868,7 +899,7 @@ static void process_ls_pack(struct remote_ls_ctx *ls)
 
        if (strlen(ls->dentry_name) == 63 &&
            !strncmp(ls->dentry_name, "objects/pack/pack-", 18) &&
-           !strncmp(ls->dentry_name+58, ".pack", 5)) {
+           has_extension(ls->dentry_name, ".pack")) {
                get_sha1_hex(ls->dentry_name + 18, sha1);
                setup_index(ls->repo, sha1);
        }
@@ -1185,7 +1216,7 @@ int fetch_ref(char *ref, unsigned char *sha1)
         char *url;
         char hex[42];
         struct buffer buffer;
-       char *base = alt->base;
+       const char *base = alt->base;
        struct active_request_slot *slot;
        struct slot_results results;
         buffer.size = 41;
@@ -1214,14 +1245,17 @@ int fetch_ref(char *ref, unsigned char *sha1)
         return 0;
 }
 
-int main(int argc, char **argv)
+int main(int argc, const char **argv)
 {
-       char *commit_id;
-       char *url;
+       int commits;
+       const char **write_ref = NULL;
+       char **commit_id;
+       const char *url;
        char *path;
        int arg = 1;
        int rc = 0;
 
+       setup_ident();
        setup_git_directory();
        git_config(git_default_config);
 
@@ -1237,20 +1271,26 @@ int main(int argc, char **argv)
                } else if (argv[arg][1] == 'v') {
                        get_verbosely = 1;
                } else if (argv[arg][1] == 'w') {
-                       write_ref = argv[arg + 1];
+                       write_ref = &argv[arg + 1];
                        arg++;
                } else if (!strcmp(argv[arg], "--recover")) {
                        get_recover = 1;
+               } else if (!strcmp(argv[arg], "--stdin")) {
+                       commits_on_stdin = 1;
                }
                arg++;
        }
-       if (argc < arg + 2) {
-               usage("git-http-fetch [-c] [-t] [-a] [-d] [-v] [--recover] [-w ref] commit-id url");
+       if (argc < arg + 2 - commits_on_stdin) {
+               usage("git-http-fetch [-c] [-t] [-a] [-v] [--recover] [-w ref] [--stdin] commit-id url");
                return 1;
        }
-       commit_id = argv[arg];
-       url = argv[arg + 1];
-       write_ref_log_details = url;
+       if (commits_on_stdin) {
+               commits = pull_targets_stdin(&commit_id, &write_ref);
+       } else {
+               commit_id = (char **) &argv[arg++];
+               commits = 1;
+       }
+       url = argv[arg];
 
        http_init();
 
@@ -1268,13 +1308,16 @@ int main(int argc, char **argv)
                        alt->path_len = strlen(path);
        }
 
-       if (pull(commit_id))
+       if (pull(commits, commit_id, write_ref, url))
                rc = 1;
 
        http_cleanup();
 
        curl_slist_free_all(no_pragma_header);
 
+       if (commits_on_stdin)
+               pull_targets_free(commits, commit_id, write_ref);
+
        if (corrupt_object_found) {
                fprintf(stderr,
 "Some loose object were found to be corrupt, but they might be just\n"