blame: Notice a wholesale incorporation of an existing file.

diff --git a/object.c b/object.c
index 92813001e25f20ae7dd7a1e0f0ef11ec5d746030..78a44a6ef4e4823487861c9173f3db4a3fb76e3a 100644 (file)
--- a/object.c
+++ b/object.c
@@ -18,11 +18,31 @@ struct object *get_indexed_object(unsigned int idx)
        return obj_hash[idx];
 }
 
-const char *type_names[] = {
-       "none", "commit", "tree", "blob", "tag",
-       "bad type 5", "bad type 6", "delta", "bad",
+static const char *object_type_strings[] = {
+       NULL,           /* OBJ_NONE = 0 */
+       "commit",       /* OBJ_COMMIT = 1 */
+       "tree",         /* OBJ_TREE = 2 */
+       "blob",         /* OBJ_BLOB = 3 */
+       "tag",          /* OBJ_TAG = 4 */
 };
 
+const char *typename(unsigned int type)
+{
+       if (type >= ARRAY_SIZE(object_type_strings))
+               return NULL;
+       return object_type_strings[type];
+}
+
+int type_from_string(const char *str)
+{
+       int i;
+
+       for (i = 1; i < ARRAY_SIZE(object_type_strings); i++)
+               if (!strcmp(str, object_type_strings[i]))
+                       return i;
+       die("invalid object type \"%s\"", str);
+}
+
 static unsigned int hash_obj(struct object *obj, unsigned int n)
 {
        unsigned int hash = *(unsigned int *)obj->sha1;
@@ -100,24 +120,6 @@ void created_object(const unsigned char *sha1, struct object *obj)
        nr_objs++;
 }
 
-struct object *lookup_object_type(const unsigned char *sha1, const char *type)
-{
-       if (!type) {
-               return lookup_unknown_object(sha1);
-       } else if (!strcmp(type, blob_type)) {
-               return &lookup_blob(sha1)->object;
-       } else if (!strcmp(type, tree_type)) {
-               return &lookup_tree(sha1)->object;
-       } else if (!strcmp(type, commit_type)) {
-               return &lookup_commit(sha1)->object;
-       } else if (!strcmp(type, tag_type)) {
-               return &lookup_tag(sha1)->object;
-       } else {
-               error("Unknown type %s", type);
-               return NULL;
-       }
-}
-
 union any_object {
        struct object object;
        struct commit commit;
@@ -138,42 +140,58 @@ struct object *lookup_unknown_object(const unsigned char *sha1)
        return obj;
 }
 
+struct object *parse_object_buffer(const unsigned char *sha1, enum object_type type, unsigned long size, void *buffer, int *eaten_p)
+{
+       struct object *obj;
+       int eaten = 0;
+
+       if (type == OBJ_BLOB) {
+               struct blob *blob = lookup_blob(sha1);
+               parse_blob_buffer(blob, buffer, size);
+               obj = &blob->object;
+       } else if (type == OBJ_TREE) {
+               struct tree *tree = lookup_tree(sha1);
+               obj = &tree->object;
+               if (!tree->object.parsed) {
+                       parse_tree_buffer(tree, buffer, size);
+                       eaten = 1;
+               }
+       } else if (type == OBJ_COMMIT) {
+               struct commit *commit = lookup_commit(sha1);
+               parse_commit_buffer(commit, buffer, size);
+               if (!commit->buffer) {
+                       commit->buffer = buffer;
+                       eaten = 1;
+               }
+               obj = &commit->object;
+       } else if (type == OBJ_TAG) {
+               struct tag *tag = lookup_tag(sha1);
+               parse_tag_buffer(tag, buffer, size);
+               obj = &tag->object;
+       } else {
+               obj = NULL;
+       }
+       *eaten_p = eaten;
+       return obj;
+}
+
 struct object *parse_object(const unsigned char *sha1)
 {
        unsigned long size;
-       char type[20];
-       void *buffer = read_sha1_file(sha1, type, &size);
+       enum object_type type;
+       int eaten;
+       void *buffer = read_sha1_file(sha1, &type, &size);
+
        if (buffer) {
                struct object *obj;
-               if (check_sha1_signature(sha1, buffer, size, type) < 0)
-                       printf("sha1 mismatch %s\n", sha1_to_hex(sha1));
-               if (!strcmp(type, blob_type)) {
-                       struct blob *blob = lookup_blob(sha1);
-                       parse_blob_buffer(blob, buffer, size);
-                       obj = &blob->object;
-               } else if (!strcmp(type, tree_type)) {
-                       struct tree *tree = lookup_tree(sha1);
-                       obj = &tree->object;
-                       if (!tree->object.parsed) {
-                               parse_tree_buffer(tree, buffer, size);
-                               buffer = NULL;
-                       }
-               } else if (!strcmp(type, commit_type)) {
-                       struct commit *commit = lookup_commit(sha1);
-                       parse_commit_buffer(commit, buffer, size);
-                       if (!commit->buffer) {
-                               commit->buffer = buffer;
-                               buffer = NULL;
-                       }
-                       obj = &commit->object;
-               } else if (!strcmp(type, tag_type)) {
-                       struct tag *tag = lookup_tag(sha1);
-                       parse_tag_buffer(tag, buffer, size);
-                       obj = &tag->object;
-               } else {
-                       obj = NULL;
+               if (check_sha1_signature(sha1, buffer, size, typename(type)) < 0) {
+                       error("sha1 mismatch %s\n", sha1_to_hex(sha1));
+                       return NULL;
                }
-               free(buffer);
+
+               obj = parse_object_buffer(sha1, type, size, buffer, &eaten);
+               if (!eaten)
+                       free(buffer);
                return obj;
        }
        return NULL;