expose a helper function peel_to_type().

diff --git a/sha1_name.c b/sha1_name.c
index d364244dc4667d963f8a9b50ee01e58e9eac3b3c..739f1b2d49a6a87e3b5db3d8cadb151d27363a6a 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -423,6 +423,37 @@ static int get_nth_ancestor(const char *name, int len,
        return 0;
 }
 
+struct object *peel_to_type(const char *name, int namelen,
+                           struct object *o, enum object_type expected_type)
+{
+       if (name && !namelen)
+               namelen = strlen(name);
+       if (!o) {
+               unsigned char sha1[20];
+               if (get_sha1_1(name, namelen, sha1))
+                       return NULL;
+               o = parse_object(sha1);
+       }
+       while (1) {
+               if (!o || (!o->parsed && !parse_object(o->sha1)))
+                       return NULL;
+               if (o->type == expected_type)
+                       return o;
+               if (o->type == OBJ_TAG)
+                       o = ((struct tag*) o)->tagged;
+               else if (o->type == OBJ_COMMIT)
+                       o = &(((struct commit *) o)->tree->object);
+               else {
+                       if (name)
+                               error("%.*s: expected %s type, but the object "
+                                     "dereferences to %s type",
+                                     namelen, name, typename(expected_type),
+                                     typename(o->type));
+                       return NULL;
+               }
+       }
+}
+
 static int peel_onion(const char *name, int len, unsigned char *sha1)
 {
        unsigned char outer[20];
@@ -474,29 +505,17 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
                hashcpy(sha1, o->sha1);
        }
        else {
-               /* At this point, the syntax look correct, so
+               /*
+                * At this point, the syntax look correct, so
                 * if we do not get the needed object, we should
                 * barf.
                 */
-
-               while (1) {
-                       if (!o || (!o->parsed && !parse_object(o->sha1)))
-                               return -1;
-                       if (o->type == expected_type) {
-                               hashcpy(sha1, o->sha1);
-                               return 0;
-                       }
-                       if (o->type == OBJ_TAG)
-                               o = ((struct tag*) o)->tagged;
-                       else if (o->type == OBJ_COMMIT)
-                               o = &(((struct commit *) o)->tree->object);
-                       else
-                               return error("%.*s: expected %s type, but the object dereferences to %s type",
-                                            len, name, typename(expected_type),
-                                            typename(o->type));
-                       if (!o->parsed)
-                               parse_object(o->sha1);
+               o = peel_to_type(name, len, o, expected_type);
+               if (o) {
+                       hashcpy(sha1, o->sha1);
+                       return 0;
                }
+               return -1;
        }
        return 0;
 }
@@ -578,8 +597,11 @@ static int handle_one_ref(const char *path,
        struct object *object = parse_object(sha1);
        if (!object)
                return 0;
-       if (object->type == OBJ_TAG)
+       if (object->type == OBJ_TAG) {
                object = deref_tag(object, path, strlen(path));
+               if (!object)
+                       return 0;
+       }
        if (object->type != OBJ_COMMIT)
                return 0;
        insert_by_date((struct commit *)object, list);
@@ -600,24 +622,35 @@ static int get_sha1_oneline(const char *prefix, unsigned char *sha1)
 {
        struct commit_list *list = NULL, *backup = NULL, *l;
        int retval = -1;
+       char *temp_commit_buffer = NULL;
 
        if (prefix[0] == '!') {
                if (prefix[1] != '!')
                        die ("Invalid search pattern: %s", prefix);
                prefix++;
        }
-       if (!save_commit_buffer)
-               return error("Could not expand oneline-name.");
        for_each_ref(handle_one_ref, &list);
        for (l = list; l; l = l->next)
                commit_list_insert(l->item, &backup);
        while (list) {
                char *p;
                struct commit *commit;
+               enum object_type type;
+               unsigned long size;
 
                commit = pop_most_recent_commit(&list, ONELINE_SEEN);
                parse_object(commit->object.sha1);
-               if (!commit->buffer || !(p = strstr(commit->buffer, "\n\n")))
+               if (temp_commit_buffer)
+                       free(temp_commit_buffer);
+               if (commit->buffer)
+                       p = commit->buffer;
+               else {
+                       p = read_sha1_file(commit->object.sha1, &type, &size);
+                       if (!p)
+                               continue;
+                       temp_commit_buffer = p;
+               }
+               if (!(p = strstr(p, "\n\n")))
                        continue;
                if (!prefixcmp(p + 2, prefix)) {
                        hashcpy(sha1, commit->object.sha1);
@@ -625,6 +658,8 @@ static int get_sha1_oneline(const char *prefix, unsigned char *sha1)
                        break;
                }
        }
+       if (temp_commit_buffer)
+               free(temp_commit_buffer);
        free_commit_list(list);
        for (l = backup; l; l = l->next)
                clear_commit_marks(l->item, ONELINE_SEEN);
@@ -682,7 +717,7 @@ int get_sha1_with_mode(const char *name, unsigned char *sha1, unsigned *mode)
                                break;
                        if (ce_stage(ce) == stage) {
                                hashcpy(sha1, ce->sha1);
-                               *mode = ntohl(ce->ce_mode);
+                               *mode = ce->ce_mode;
                                return 0;
                        }
                        pos++;