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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 | ||
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 | } | |
16 | if (obj->type != tag_type) { | |
17 | error("Object %s is a %s, not a tree", | |
18 | sha1_to_hex(sha1), obj->type); | |
19 | return NULL; | |
20 | } | |
21 | return (struct tag *) obj; | |
22 | } | |
23 | ||
bd2c39f5 | 24 | int parse_tag_buffer(struct tag *item, void *data, unsigned long size) |
2636f614 | 25 | { |
ae200ee5 ET |
26 | int typelen, taglen; |
27 | unsigned char object[20]; | |
28 | const char *type_line, *tag_line, *sig_line; | |
29 | ||
2636f614 DB |
30 | if (item->object.parsed) |
31 | return 0; | |
32 | item->object.parsed = 1; | |
2636f614 | 33 | |
2636f614 | 34 | if (size < 64) |
bd2c39f5 | 35 | return -1; |
2636f614 | 36 | if (memcmp("object ", data, 7) || get_sha1_hex(data + 7, object)) |
bd2c39f5 | 37 | return -1; |
2636f614 DB |
38 | |
39 | item->tagged = parse_object(object); | |
770896e5 LT |
40 | if (item->tagged) |
41 | add_ref(&item->object, item->tagged); | |
2636f614 DB |
42 | |
43 | type_line = data + 48; | |
44 | if (memcmp("\ntype ", type_line-1, 6)) | |
bd2c39f5 | 45 | return -1; |
2636f614 DB |
46 | |
47 | tag_line = strchr(type_line, '\n'); | |
48 | if (!tag_line || memcmp("tag ", ++tag_line, 4)) | |
bd2c39f5 | 49 | return -1; |
2636f614 DB |
50 | |
51 | sig_line = strchr(tag_line, '\n'); | |
52 | if (!sig_line) | |
bd2c39f5 | 53 | return -1; |
2636f614 DB |
54 | sig_line++; |
55 | ||
56 | typelen = tag_line - type_line - strlen("type \n"); | |
57 | if (typelen >= 20) | |
bd2c39f5 | 58 | return -1; |
2636f614 DB |
59 | taglen = sig_line - tag_line - strlen("tag \n"); |
60 | item->tag = xmalloc(taglen + 1); | |
61 | memcpy(item->tag, tag_line + 4, taglen); | |
62 | item->tag[taglen] = '\0'; | |
63 | ||
64 | return 0; | |
bd2c39f5 | 65 | } |
13019d41 | 66 | |
bd2c39f5 NP |
67 | int parse_tag(struct tag *item) |
68 | { | |
69 | char type[20]; | |
70 | void *data; | |
71 | unsigned long size; | |
72 | int ret; | |
73 | ||
74 | if (item->object.parsed) | |
75 | return 0; | |
76 | data = read_sha1_file(item->object.sha1, type, &size); | |
77 | if (!data) | |
78 | return error("Could not read %s", | |
79 | sha1_to_hex(item->object.sha1)); | |
80 | if (strcmp(type, tag_type)) { | |
81 | free(data); | |
82 | return error("Object %s not a tag", | |
83 | sha1_to_hex(item->object.sha1)); | |
84 | } | |
85 | ret = parse_tag_buffer(item, data, size); | |
13019d41 | 86 | free(data); |
bd2c39f5 | 87 | return ret; |
2636f614 | 88 | } |