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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 | ||
9534f40b | 6 | struct object *deref_tag(struct object *o, const char *warn, int warnlen) |
37fde874 JH |
7 | { |
8 | while (o && o->type == tag_type) | |
9 | o = parse_object(((struct tag *)o)->tagged->sha1); | |
9534f40b JH |
10 | if (!o && warn) { |
11 | if (!warnlen) | |
12 | warnlen = strlen(warn); | |
13 | error("missing object referenced by '%.*s'", warnlen, warn); | |
14 | } | |
37fde874 JH |
15 | return o; |
16 | } | |
17 | ||
5d6ccf5c | 18 | struct tag *lookup_tag(const unsigned char *sha1) |
2636f614 DB |
19 | { |
20 | struct object *obj = lookup_object(sha1); | |
21 | if (!obj) { | |
22 | struct tag *ret = xmalloc(sizeof(struct tag)); | |
23 | memset(ret, 0, sizeof(struct tag)); | |
24 | created_object(sha1, &ret->object); | |
25 | ret->object.type = tag_type; | |
26 | return ret; | |
27 | } | |
d1af002d NP |
28 | if (!obj->type) |
29 | obj->type = tag_type; | |
2636f614 DB |
30 | if (obj->type != tag_type) { |
31 | error("Object %s is a %s, not a tree", | |
32 | sha1_to_hex(sha1), obj->type); | |
33 | return NULL; | |
34 | } | |
35 | return (struct tag *) obj; | |
36 | } | |
37 | ||
bd2c39f5 | 38 | int parse_tag_buffer(struct tag *item, void *data, unsigned long size) |
2636f614 | 39 | { |
ae200ee5 ET |
40 | int typelen, taglen; |
41 | unsigned char object[20]; | |
42 | const char *type_line, *tag_line, *sig_line; | |
89e4202f | 43 | char type[20]; |
ae200ee5 | 44 | |
2636f614 DB |
45 | if (item->object.parsed) |
46 | return 0; | |
47 | item->object.parsed = 1; | |
2636f614 | 48 | |
2636f614 | 49 | if (size < 64) |
bd2c39f5 | 50 | return -1; |
2636f614 | 51 | if (memcmp("object ", data, 7) || get_sha1_hex(data + 7, object)) |
bd2c39f5 | 52 | return -1; |
2636f614 | 53 | |
2636f614 DB |
54 | type_line = data + 48; |
55 | if (memcmp("\ntype ", type_line-1, 6)) | |
bd2c39f5 | 56 | return -1; |
2636f614 DB |
57 | |
58 | tag_line = strchr(type_line, '\n'); | |
59 | if (!tag_line || memcmp("tag ", ++tag_line, 4)) | |
bd2c39f5 | 60 | return -1; |
2636f614 DB |
61 | |
62 | sig_line = strchr(tag_line, '\n'); | |
63 | if (!sig_line) | |
bd2c39f5 | 64 | return -1; |
2636f614 DB |
65 | sig_line++; |
66 | ||
67 | typelen = tag_line - type_line - strlen("type \n"); | |
68 | if (typelen >= 20) | |
bd2c39f5 | 69 | return -1; |
89e4202f DB |
70 | memcpy(type, type_line + 5, typelen); |
71 | type[typelen] = '\0'; | |
2636f614 DB |
72 | taglen = sig_line - tag_line - strlen("tag \n"); |
73 | item->tag = xmalloc(taglen + 1); | |
74 | memcpy(item->tag, tag_line + 4, taglen); | |
75 | item->tag[taglen] = '\0'; | |
76 | ||
89e4202f | 77 | item->tagged = lookup_object_type(object, type); |
27dedf0c JH |
78 | if (item->tagged && track_object_refs) { |
79 | struct object_refs *refs = alloc_object_refs(1); | |
80 | refs->ref[0] = item->tagged; | |
81 | set_object_refs(&item->object, refs); | |
82 | } | |
89e4202f | 83 | |
2636f614 | 84 | return 0; |
bd2c39f5 | 85 | } |
13019d41 | 86 | |
bd2c39f5 NP |
87 | int parse_tag(struct tag *item) |
88 | { | |
89 | char type[20]; | |
90 | void *data; | |
91 | unsigned long size; | |
92 | int ret; | |
93 | ||
94 | if (item->object.parsed) | |
95 | return 0; | |
96 | data = read_sha1_file(item->object.sha1, type, &size); | |
97 | if (!data) | |
98 | return error("Could not read %s", | |
99 | sha1_to_hex(item->object.sha1)); | |
100 | if (strcmp(type, tag_type)) { | |
101 | free(data); | |
102 | return error("Object %s not a tag", | |
103 | sha1_to_hex(item->object.sha1)); | |
104 | } | |
105 | ret = parse_tag_buffer(item, data, size); | |
13019d41 | 106 | free(data); |
bd2c39f5 | 107 | return ret; |
2636f614 | 108 | } |