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Commit | Line | Data |
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2636f614 | 1 | #include "cache.h" |
8f1d2e6f | 2 | #include "tag.h" |
2636f614 DB |
3 | |
4 | const char *tag_type = "tag"; | |
5 | ||
9534f40b | 6 | struct object *deref_tag(struct object *o, const char *warn, int warnlen) |
37fde874 | 7 | { |
1974632c | 8 | while (o && o->type == OBJ_TAG) |
37fde874 | 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) { | |
855419f7 | 22 | struct tag *ret = alloc_tag_node(); |
2636f614 | 23 | created_object(sha1, &ret->object); |
1974632c | 24 | ret->object.type = OBJ_TAG; |
2636f614 DB |
25 | return ret; |
26 | } | |
d1af002d | 27 | if (!obj->type) |
1974632c LT |
28 | obj->type = OBJ_TAG; |
29 | if (obj->type != OBJ_TAG) { | |
885a86ab LT |
30 | error("Object %s is a %s, not a tree", |
31 | sha1_to_hex(sha1), typename(obj->type)); | |
2636f614 DB |
32 | return NULL; |
33 | } | |
34 | return (struct tag *) obj; | |
35 | } | |
36 | ||
bd2c39f5 | 37 | int parse_tag_buffer(struct tag *item, void *data, unsigned long size) |
2636f614 | 38 | { |
ae200ee5 ET |
39 | int typelen, taglen; |
40 | unsigned char object[20]; | |
41 | const char *type_line, *tag_line, *sig_line; | |
89e4202f | 42 | char type[20]; |
ae200ee5 | 43 | |
2636f614 DB |
44 | if (item->object.parsed) |
45 | return 0; | |
46 | item->object.parsed = 1; | |
2636f614 | 47 | |
2636f614 | 48 | if (size < 64) |
bd2c39f5 | 49 | return -1; |
1d7f171c | 50 | if (memcmp("object ", data, 7) || get_sha1_hex((char *) data + 7, object)) |
bd2c39f5 | 51 | return -1; |
2636f614 | 52 | |
1d7f171c | 53 | type_line = (char *) data + 48; |
2636f614 | 54 | if (memcmp("\ntype ", type_line-1, 6)) |
bd2c39f5 | 55 | return -1; |
2636f614 DB |
56 | |
57 | tag_line = strchr(type_line, '\n'); | |
58 | if (!tag_line || memcmp("tag ", ++tag_line, 4)) | |
bd2c39f5 | 59 | return -1; |
2636f614 DB |
60 | |
61 | sig_line = strchr(tag_line, '\n'); | |
62 | if (!sig_line) | |
bd2c39f5 | 63 | return -1; |
2636f614 DB |
64 | sig_line++; |
65 | ||
66 | typelen = tag_line - type_line - strlen("type \n"); | |
67 | if (typelen >= 20) | |
bd2c39f5 | 68 | return -1; |
89e4202f DB |
69 | memcpy(type, type_line + 5, typelen); |
70 | type[typelen] = '\0'; | |
2636f614 DB |
71 | taglen = sig_line - tag_line - strlen("tag \n"); |
72 | item->tag = xmalloc(taglen + 1); | |
73 | memcpy(item->tag, tag_line + 4, taglen); | |
74 | item->tag[taglen] = '\0'; | |
75 | ||
89e4202f | 76 | item->tagged = lookup_object_type(object, type); |
27dedf0c JH |
77 | if (item->tagged && track_object_refs) { |
78 | struct object_refs *refs = alloc_object_refs(1); | |
79 | refs->ref[0] = item->tagged; | |
80 | set_object_refs(&item->object, refs); | |
81 | } | |
89e4202f | 82 | |
2636f614 | 83 | return 0; |
bd2c39f5 | 84 | } |
13019d41 | 85 | |
bd2c39f5 NP |
86 | int parse_tag(struct tag *item) |
87 | { | |
88 | char type[20]; | |
89 | void *data; | |
90 | unsigned long size; | |
91 | int ret; | |
92 | ||
93 | if (item->object.parsed) | |
94 | return 0; | |
95 | data = read_sha1_file(item->object.sha1, type, &size); | |
96 | if (!data) | |
97 | return error("Could not read %s", | |
98 | sha1_to_hex(item->object.sha1)); | |
99 | if (strcmp(type, tag_type)) { | |
100 | free(data); | |
101 | return error("Object %s not a tag", | |
102 | sha1_to_hex(item->object.sha1)); | |
103 | } | |
104 | ret = parse_tag_buffer(item, data, size); | |
13019d41 | 105 | free(data); |
bd2c39f5 | 106 | return ret; |
2636f614 | 107 | } |