4 const char *tag_type = "tag";
6 struct tag *lookup_tag(unsigned char *sha1)
8 struct object *obj = lookup_object(sha1);
10 struct tag *ret = xmalloc(sizeof(struct tag));
11 memset(ret, 0, sizeof(struct tag));
12 created_object(sha1, &ret->object);
13 ret->object.type = tag_type;
18 if (obj->type != tag_type) {
19 error("Object %s is a %s, not a tree",
20 sha1_to_hex(sha1), obj->type);
23 return (struct tag *) obj;
26 int parse_tag_buffer(struct tag *item, void *data, unsigned long size)
29 unsigned char object[20];
30 const char *type_line, *tag_line, *sig_line;
32 if (item->object.parsed)
34 item->object.parsed = 1;
38 if (memcmp("object ", data, 7) || get_sha1_hex(data + 7, object))
41 item->tagged = parse_object(object);
43 add_ref(&item->object, item->tagged);
45 type_line = data + 48;
46 if (memcmp("\ntype ", type_line-1, 6))
49 tag_line = strchr(type_line, '\n');
50 if (!tag_line || memcmp("tag ", ++tag_line, 4))
53 sig_line = strchr(tag_line, '\n');
58 typelen = tag_line - type_line - strlen("type \n");
61 taglen = sig_line - tag_line - strlen("tag \n");
62 item->tag = xmalloc(taglen + 1);
63 memcpy(item->tag, tag_line + 4, taglen);
64 item->tag[taglen] = '\0';
69 int parse_tag(struct tag *item)
76 if (item->object.parsed)
78 data = read_sha1_file(item->object.sha1, type, &size);
80 return error("Could not read %s",
81 sha1_to_hex(item->object.sha1));
82 if (strcmp(type, tag_type)) {
84 return error("Object %s not a tag",
85 sha1_to_hex(item->object.sha1));
87 ret = parse_tag_buffer(item, data, size);