]>
Commit | Line | Data |
---|---|---|
2636f614 DB |
1 | #include "tag.h" |
2 | #include "cache.h" | |
3 | ||
4 | const char *tag_type = "tag"; | |
5 | ||
6 | struct tag *lookup_tag(unsigned char *sha1) | |
7 | { | |
8 | struct object *obj = lookup_object(sha1); | |
9 | if (!obj) { | |
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; | |
14 | return ret; | |
15 | } | |
d1af002d NP |
16 | if (!obj->type) |
17 | obj->type = tag_type; | |
2636f614 DB |
18 | if (obj->type != tag_type) { |
19 | error("Object %s is a %s, not a tree", | |
20 | sha1_to_hex(sha1), obj->type); | |
21 | return NULL; | |
22 | } | |
23 | return (struct tag *) obj; | |
24 | } | |
25 | ||
bd2c39f5 | 26 | int parse_tag_buffer(struct tag *item, void *data, unsigned long size) |
2636f614 | 27 | { |
ae200ee5 ET |
28 | int typelen, taglen; |
29 | unsigned char object[20]; | |
30 | const char *type_line, *tag_line, *sig_line; | |
31 | ||
2636f614 DB |
32 | if (item->object.parsed) |
33 | return 0; | |
34 | item->object.parsed = 1; | |
2636f614 | 35 | |
2636f614 | 36 | if (size < 64) |
bd2c39f5 | 37 | return -1; |
2636f614 | 38 | if (memcmp("object ", data, 7) || get_sha1_hex(data + 7, object)) |
bd2c39f5 | 39 | return -1; |
2636f614 DB |
40 | |
41 | item->tagged = parse_object(object); | |
770896e5 LT |
42 | if (item->tagged) |
43 | add_ref(&item->object, item->tagged); | |
2636f614 DB |
44 | |
45 | type_line = data + 48; | |
46 | if (memcmp("\ntype ", type_line-1, 6)) | |
bd2c39f5 | 47 | return -1; |
2636f614 DB |
48 | |
49 | tag_line = strchr(type_line, '\n'); | |
50 | if (!tag_line || memcmp("tag ", ++tag_line, 4)) | |
bd2c39f5 | 51 | return -1; |
2636f614 DB |
52 | |
53 | sig_line = strchr(tag_line, '\n'); | |
54 | if (!sig_line) | |
bd2c39f5 | 55 | return -1; |
2636f614 DB |
56 | sig_line++; |
57 | ||
58 | typelen = tag_line - type_line - strlen("type \n"); | |
59 | if (typelen >= 20) | |
bd2c39f5 | 60 | return -1; |
2636f614 DB |
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'; | |
65 | ||
66 | return 0; | |
bd2c39f5 | 67 | } |
13019d41 | 68 | |
bd2c39f5 NP |
69 | int parse_tag(struct tag *item) |
70 | { | |
71 | char type[20]; | |
72 | void *data; | |
73 | unsigned long size; | |
74 | int ret; | |
75 | ||
76 | if (item->object.parsed) | |
77 | return 0; | |
78 | data = read_sha1_file(item->object.sha1, type, &size); | |
79 | if (!data) | |
80 | return error("Could not read %s", | |
81 | sha1_to_hex(item->object.sha1)); | |
82 | if (strcmp(type, tag_type)) { | |
83 | free(data); | |
84 | return error("Object %s not a tag", | |
85 | sha1_to_hex(item->object.sha1)); | |
86 | } | |
87 | ret = parse_tag_buffer(item, data, size); | |
13019d41 | 88 | free(data); |
bd2c39f5 | 89 | return ret; |
2636f614 | 90 | } |