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Commit | Line | Data |
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175785e5 DB |
1 | #include "commit.h" |
2 | #include "cache.h" | |
3 | #include <string.h> | |
b2c00718 | 4 | #include <limits.h> |
175785e5 DB |
5 | |
6 | const char *commit_type = "commit"; | |
7 | ||
8 | struct commit *lookup_commit(unsigned char *sha1) | |
9 | { | |
10 | struct object *obj = lookup_object(sha1); | |
11 | if (!obj) { | |
12 | struct commit *ret = malloc(sizeof(struct commit)); | |
13 | memset(ret, 0, sizeof(struct commit)); | |
14 | created_object(sha1, &ret->object); | |
15 | return ret; | |
16 | } | |
17 | if (obj->parsed && obj->type != commit_type) { | |
18 | error("Object %s is a %s, not a commit", | |
19 | sha1_to_hex(sha1), obj->type); | |
20 | return NULL; | |
21 | } | |
22 | return (struct commit *) obj; | |
23 | } | |
24 | ||
25 | static unsigned long parse_commit_date(const char *buf) | |
26 | { | |
27 | unsigned long date; | |
28 | ||
29 | if (memcmp(buf, "author", 6)) | |
30 | return 0; | |
31 | while (*buf++ != '\n') | |
32 | /* nada */; | |
33 | if (memcmp(buf, "committer", 9)) | |
34 | return 0; | |
35 | while (*buf++ != '>') | |
36 | /* nada */; | |
37 | date = strtoul(buf, NULL, 10); | |
38 | if (date == ULONG_MAX) | |
39 | date = 0; | |
40 | return date; | |
41 | } | |
42 | ||
43 | int parse_commit(struct commit *item) | |
44 | { | |
45 | char type[20]; | |
46 | void * buffer, *bufptr; | |
47 | unsigned long size; | |
48 | unsigned char parent[20]; | |
49 | if (item->object.parsed) | |
50 | return 0; | |
51 | item->object.parsed = 1; | |
52 | buffer = bufptr = read_sha1_file(item->object.sha1, type, &size); | |
53 | if (!buffer) | |
54 | return error("Could not read %s", | |
55 | sha1_to_hex(item->object.sha1)); | |
56 | if (strcmp(type, commit_type)) | |
57 | return error("Object %s not a commit", | |
58 | sha1_to_hex(item->object.sha1)); | |
59 | item->object.type = commit_type; | |
60 | get_sha1_hex(bufptr + 5, parent); | |
61 | item->tree = lookup_tree(parent); | |
62 | add_ref(&item->object, &item->tree->object); | |
63 | bufptr += 46; /* "tree " + "hex sha1" + "\n" */ | |
64 | while (!memcmp(bufptr, "parent ", 7) && | |
65 | !get_sha1_hex(bufptr + 7, parent)) { | |
66 | struct commit_list *new_parent = | |
67 | malloc(sizeof(struct commit_list)); | |
68 | new_parent->next = item->parents; | |
69 | new_parent->item = lookup_commit(parent); | |
70 | add_ref(&item->object, &new_parent->item->object); | |
71 | item->parents = new_parent; | |
72 | bufptr += 48; | |
73 | } | |
74 | item->date = parse_commit_date(bufptr); | |
75 | free(buffer); | |
76 | return 0; | |
77 | } | |
78 | ||
79 | void free_commit_list(struct commit_list *list) | |
80 | { | |
81 | while (list) { | |
82 | struct commit_list *temp = list; | |
83 | list = temp->next; | |
84 | free(temp); | |
85 | } | |
86 | } |