+
+struct object *lookup_object_type(const unsigned char *sha1, const char *type)
+{
+ 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;
+ }
+}
+
+struct object *parse_object(const unsigned char *sha1)
+{
+ unsigned long size;
+ char type[20];
+ 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")) {
+ struct blob *blob = lookup_blob(sha1);
+ parse_blob_buffer(blob, buffer, size);
+ obj = &blob->object;
+ } else if (!strcmp(type, "tree")) {
+ struct tree *tree = lookup_tree(sha1);
+ parse_tree_buffer(tree, buffer, size);
+ obj = &tree->object;
+ } else if (!strcmp(type, "commit")) {
+ 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")) {
+ struct tag *tag = lookup_tag(sha1);
+ parse_tag_buffer(tag, buffer, size);
+ obj = &tag->object;
+ } else {
+ obj = NULL;
+ }
+ free(buffer);
+ return obj;
+ }
+ return NULL;
+}