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Commit | Line | Data |
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961784ee | 1 | #include "tag.h" |
175785e5 DB |
2 | #include "commit.h" |
3 | #include "cache.h" | |
175785e5 DB |
4 | |
5 | const char *commit_type = "commit"; | |
6 | ||
961784ee LT |
7 | static struct commit *check_commit(struct object *obj, unsigned char *sha1) |
8 | { | |
9 | if (obj->type != commit_type) { | |
10 | error("Object %s is a %s, not a commit", | |
11 | sha1_to_hex(sha1), obj->type); | |
12 | return NULL; | |
13 | } | |
14 | return (struct commit *) obj; | |
15 | } | |
16 | ||
17 | struct commit *lookup_commit_reference(unsigned char *sha1) | |
18 | { | |
19 | struct object *obj = parse_object(sha1); | |
20 | ||
21 | if (!obj) | |
22 | return NULL; | |
23 | if (obj->type == tag_type) | |
24 | obj = ((struct tag *)obj)->tagged; | |
25 | return check_commit(obj, sha1); | |
26 | } | |
27 | ||
175785e5 DB |
28 | struct commit *lookup_commit(unsigned char *sha1) |
29 | { | |
30 | struct object *obj = lookup_object(sha1); | |
31 | if (!obj) { | |
812666c8 | 32 | struct commit *ret = xmalloc(sizeof(struct commit)); |
175785e5 DB |
33 | memset(ret, 0, sizeof(struct commit)); |
34 | created_object(sha1, &ret->object); | |
d32987be | 35 | ret->object.type = commit_type; |
175785e5 DB |
36 | return ret; |
37 | } | |
d1af002d NP |
38 | if (!obj->type) |
39 | obj->type = commit_type; | |
961784ee | 40 | return check_commit(obj, sha1); |
175785e5 DB |
41 | } |
42 | ||
43 | static unsigned long parse_commit_date(const char *buf) | |
44 | { | |
45 | unsigned long date; | |
46 | ||
47 | if (memcmp(buf, "author", 6)) | |
48 | return 0; | |
49 | while (*buf++ != '\n') | |
50 | /* nada */; | |
51 | if (memcmp(buf, "committer", 9)) | |
52 | return 0; | |
53 | while (*buf++ != '>') | |
54 | /* nada */; | |
55 | date = strtoul(buf, NULL, 10); | |
56 | if (date == ULONG_MAX) | |
57 | date = 0; | |
58 | return date; | |
59 | } | |
60 | ||
bd2c39f5 | 61 | int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size) |
175785e5 | 62 | { |
bd2c39f5 | 63 | void *bufptr = buffer; |
175785e5 | 64 | unsigned char parent[20]; |
bd2c39f5 | 65 | |
175785e5 DB |
66 | if (item->object.parsed) |
67 | return 0; | |
68 | item->object.parsed = 1; | |
175785e5 DB |
69 | get_sha1_hex(bufptr + 5, parent); |
70 | item->tree = lookup_tree(parent); | |
235ac407 LT |
71 | if (item->tree) |
72 | add_ref(&item->object, &item->tree->object); | |
175785e5 DB |
73 | bufptr += 46; /* "tree " + "hex sha1" + "\n" */ |
74 | while (!memcmp(bufptr, "parent ", 7) && | |
75 | !get_sha1_hex(bufptr + 7, parent)) { | |
dd97f850 | 76 | struct commit *new_parent = lookup_commit(parent); |
235ac407 LT |
77 | if (new_parent) { |
78 | commit_list_insert(new_parent, &item->parents); | |
79 | add_ref(&item->object, &new_parent->object); | |
80 | } | |
175785e5 DB |
81 | bufptr += 48; |
82 | } | |
83 | item->date = parse_commit_date(bufptr); | |
175785e5 DB |
84 | return 0; |
85 | } | |
86 | ||
bd2c39f5 NP |
87 | int parse_commit(struct commit *item) |
88 | { | |
89 | char type[20]; | |
90 | void *buffer; | |
91 | unsigned long size; | |
92 | int ret; | |
93 | ||
94 | if (item->object.parsed) | |
95 | return 0; | |
96 | buffer = read_sha1_file(item->object.sha1, type, &size); | |
97 | if (!buffer) | |
98 | return error("Could not read %s", | |
99 | sha1_to_hex(item->object.sha1)); | |
100 | if (strcmp(type, commit_type)) { | |
101 | free(buffer); | |
102 | return error("Object %s not a commit", | |
103 | sha1_to_hex(item->object.sha1)); | |
104 | } | |
105 | ret = parse_commit_buffer(item, buffer, size); | |
106 | free(buffer); | |
107 | return ret; | |
108 | } | |
109 | ||
dd97f850 DB |
110 | void commit_list_insert(struct commit *item, struct commit_list **list_p) |
111 | { | |
812666c8 | 112 | struct commit_list *new_list = xmalloc(sizeof(struct commit_list)); |
dd97f850 DB |
113 | new_list->item = item; |
114 | new_list->next = *list_p; | |
115 | *list_p = new_list; | |
116 | } | |
117 | ||
175785e5 DB |
118 | void free_commit_list(struct commit_list *list) |
119 | { | |
120 | while (list) { | |
121 | struct commit_list *temp = list; | |
122 | list = temp->next; | |
123 | free(temp); | |
124 | } | |
125 | } | |
dd97f850 DB |
126 | |
127 | static void insert_by_date(struct commit_list **list, struct commit *item) | |
128 | { | |
129 | struct commit_list **pp = list; | |
130 | struct commit_list *p; | |
131 | while ((p = *pp) != NULL) { | |
132 | if (p->item->date < item->date) { | |
133 | break; | |
134 | } | |
135 | pp = &p->next; | |
136 | } | |
137 | commit_list_insert(item, pp); | |
138 | } | |
139 | ||
140 | ||
141 | void sort_by_date(struct commit_list **list) | |
142 | { | |
143 | struct commit_list *ret = NULL; | |
144 | while (*list) { | |
145 | insert_by_date(&ret, (*list)->item); | |
146 | *list = (*list)->next; | |
147 | } | |
148 | *list = ret; | |
149 | } | |
150 | ||
58e28af6 DB |
151 | struct commit *pop_most_recent_commit(struct commit_list **list, |
152 | unsigned int mark) | |
dd97f850 DB |
153 | { |
154 | struct commit *ret = (*list)->item; | |
155 | struct commit_list *parents = ret->parents; | |
156 | struct commit_list *old = *list; | |
157 | ||
158 | *list = (*list)->next; | |
159 | free(old); | |
160 | ||
161 | while (parents) { | |
4056c091 | 162 | struct commit *commit = parents->item; |
58e28af6 DB |
163 | parse_commit(commit); |
164 | if (!(commit->object.flags & mark)) { | |
165 | commit->object.flags |= mark; | |
4056c091 LT |
166 | insert_by_date(list, commit); |
167 | } | |
dd97f850 DB |
168 | parents = parents->next; |
169 | } | |
170 | return ret; | |
171 | } |