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Commit | Line | Data |
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2636f614 DB |
1 | #include "tag.h" |
2 | #include "cache.h" | |
3 | ||
4 | const char *tag_type = "tag"; | |
5 | ||
5d6ccf5c | 6 | struct tag *lookup_tag(const unsigned char *sha1) |
2636f614 DB |
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; | |
89e4202f | 31 | char type[20]; |
ae200ee5 | 32 | |
2636f614 DB |
33 | if (item->object.parsed) |
34 | return 0; | |
35 | item->object.parsed = 1; | |
2636f614 | 36 | |
2636f614 | 37 | if (size < 64) |
bd2c39f5 | 38 | return -1; |
2636f614 | 39 | if (memcmp("object ", data, 7) || get_sha1_hex(data + 7, object)) |
bd2c39f5 | 40 | return -1; |
2636f614 | 41 | |
2636f614 DB |
42 | type_line = data + 48; |
43 | if (memcmp("\ntype ", type_line-1, 6)) | |
bd2c39f5 | 44 | return -1; |
2636f614 DB |
45 | |
46 | tag_line = strchr(type_line, '\n'); | |
47 | if (!tag_line || memcmp("tag ", ++tag_line, 4)) | |
bd2c39f5 | 48 | return -1; |
2636f614 DB |
49 | |
50 | sig_line = strchr(tag_line, '\n'); | |
51 | if (!sig_line) | |
bd2c39f5 | 52 | return -1; |
2636f614 DB |
53 | sig_line++; |
54 | ||
55 | typelen = tag_line - type_line - strlen("type \n"); | |
56 | if (typelen >= 20) | |
bd2c39f5 | 57 | return -1; |
89e4202f DB |
58 | memcpy(type, type_line + 5, typelen); |
59 | type[typelen] = '\0'; | |
2636f614 DB |
60 | taglen = sig_line - tag_line - strlen("tag \n"); |
61 | item->tag = xmalloc(taglen + 1); | |
62 | memcpy(item->tag, tag_line + 4, taglen); | |
63 | item->tag[taglen] = '\0'; | |
64 | ||
89e4202f DB |
65 | item->tagged = lookup_object_type(object, type); |
66 | if (item->tagged) | |
67 | add_ref(&item->object, item->tagged); | |
68 | ||
2636f614 | 69 | return 0; |
bd2c39f5 | 70 | } |
13019d41 | 71 | |
bd2c39f5 NP |
72 | int parse_tag(struct tag *item) |
73 | { | |
74 | char type[20]; | |
75 | void *data; | |
76 | unsigned long size; | |
77 | int ret; | |
78 | ||
79 | if (item->object.parsed) | |
80 | return 0; | |
81 | data = read_sha1_file(item->object.sha1, type, &size); | |
82 | if (!data) | |
83 | return error("Could not read %s", | |
84 | sha1_to_hex(item->object.sha1)); | |
85 | if (strcmp(type, tag_type)) { | |
86 | free(data); | |
87 | return error("Object %s not a tag", | |
88 | sha1_to_hex(item->object.sha1)); | |
89 | } | |
90 | ret = parse_tag_buffer(item, data, size); | |
13019d41 | 91 | free(data); |
bd2c39f5 | 92 | return ret; |
2636f614 | 93 | } |