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Commit | Line | Data |
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000182ea | 1 | #include <ctype.h> |
961784ee | 2 | #include "tag.h" |
175785e5 DB |
3 | #include "commit.h" |
4 | #include "cache.h" | |
175785e5 DB |
5 | |
6 | const char *commit_type = "commit"; | |
7 | ||
9b66ec04 LT |
8 | enum cmit_fmt get_commit_format(const char *arg) |
9 | { | |
10 | if (!*arg) | |
11 | return CMIT_FMT_DEFAULT; | |
12 | if (!strcmp(arg, "=raw")) | |
13 | return CMIT_FMT_RAW; | |
14 | if (!strcmp(arg, "=medium")) | |
15 | return CMIT_FMT_MEDIUM; | |
16 | if (!strcmp(arg, "=short")) | |
17 | return CMIT_FMT_SHORT; | |
18 | if (!strcmp(arg, "=full")) | |
19 | return CMIT_FMT_FULL; | |
20 | die("invalid --pretty format"); | |
21 | } | |
22 | ||
5d6ccf5c | 23 | static struct commit *check_commit(struct object *obj, const unsigned char *sha1) |
961784ee LT |
24 | { |
25 | if (obj->type != commit_type) { | |
26 | error("Object %s is a %s, not a commit", | |
27 | sha1_to_hex(sha1), obj->type); | |
28 | return NULL; | |
29 | } | |
30 | return (struct commit *) obj; | |
31 | } | |
32 | ||
5d6ccf5c | 33 | struct commit *lookup_commit_reference(const unsigned char *sha1) |
961784ee LT |
34 | { |
35 | struct object *obj = parse_object(sha1); | |
36 | ||
37 | if (!obj) | |
38 | return NULL; | |
39 | if (obj->type == tag_type) | |
40 | obj = ((struct tag *)obj)->tagged; | |
41 | return check_commit(obj, sha1); | |
42 | } | |
43 | ||
5d6ccf5c | 44 | struct commit *lookup_commit(const unsigned char *sha1) |
175785e5 DB |
45 | { |
46 | struct object *obj = lookup_object(sha1); | |
47 | if (!obj) { | |
812666c8 | 48 | struct commit *ret = xmalloc(sizeof(struct commit)); |
175785e5 DB |
49 | memset(ret, 0, sizeof(struct commit)); |
50 | created_object(sha1, &ret->object); | |
d32987be | 51 | ret->object.type = commit_type; |
175785e5 DB |
52 | return ret; |
53 | } | |
d1af002d NP |
54 | if (!obj->type) |
55 | obj->type = commit_type; | |
961784ee | 56 | return check_commit(obj, sha1); |
175785e5 DB |
57 | } |
58 | ||
59 | static unsigned long parse_commit_date(const char *buf) | |
60 | { | |
61 | unsigned long date; | |
62 | ||
63 | if (memcmp(buf, "author", 6)) | |
64 | return 0; | |
65 | while (*buf++ != '\n') | |
66 | /* nada */; | |
67 | if (memcmp(buf, "committer", 9)) | |
68 | return 0; | |
69 | while (*buf++ != '>') | |
70 | /* nada */; | |
71 | date = strtoul(buf, NULL, 10); | |
72 | if (date == ULONG_MAX) | |
73 | date = 0; | |
74 | return date; | |
75 | } | |
76 | ||
bd2c39f5 | 77 | int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size) |
175785e5 | 78 | { |
bd2c39f5 | 79 | void *bufptr = buffer; |
175785e5 | 80 | unsigned char parent[20]; |
6c88be16 | 81 | struct commit_list **pptr; |
bd2c39f5 | 82 | |
175785e5 DB |
83 | if (item->object.parsed) |
84 | return 0; | |
85 | item->object.parsed = 1; | |
175785e5 DB |
86 | get_sha1_hex(bufptr + 5, parent); |
87 | item->tree = lookup_tree(parent); | |
235ac407 LT |
88 | if (item->tree) |
89 | add_ref(&item->object, &item->tree->object); | |
175785e5 | 90 | bufptr += 46; /* "tree " + "hex sha1" + "\n" */ |
6c88be16 | 91 | pptr = &item->parents; |
175785e5 DB |
92 | while (!memcmp(bufptr, "parent ", 7) && |
93 | !get_sha1_hex(bufptr + 7, parent)) { | |
dd97f850 | 94 | struct commit *new_parent = lookup_commit(parent); |
235ac407 | 95 | if (new_parent) { |
6c88be16 | 96 | pptr = &commit_list_insert(new_parent, pptr)->next; |
235ac407 LT |
97 | add_ref(&item->object, &new_parent->object); |
98 | } | |
175785e5 DB |
99 | bufptr += 48; |
100 | } | |
101 | item->date = parse_commit_date(bufptr); | |
175785e5 DB |
102 | return 0; |
103 | } | |
104 | ||
bd2c39f5 NP |
105 | int parse_commit(struct commit *item) |
106 | { | |
107 | char type[20]; | |
108 | void *buffer; | |
109 | unsigned long size; | |
110 | int ret; | |
111 | ||
112 | if (item->object.parsed) | |
113 | return 0; | |
114 | buffer = read_sha1_file(item->object.sha1, type, &size); | |
115 | if (!buffer) | |
116 | return error("Could not read %s", | |
117 | sha1_to_hex(item->object.sha1)); | |
118 | if (strcmp(type, commit_type)) { | |
119 | free(buffer); | |
120 | return error("Object %s not a commit", | |
121 | sha1_to_hex(item->object.sha1)); | |
122 | } | |
123 | ret = parse_commit_buffer(item, buffer, size); | |
3ff1fbbb LT |
124 | if (!ret) { |
125 | item->buffer = buffer; | |
126 | return 0; | |
127 | } | |
bd2c39f5 NP |
128 | free(buffer); |
129 | return ret; | |
130 | } | |
131 | ||
ac5155ef | 132 | struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p) |
dd97f850 | 133 | { |
812666c8 | 134 | struct commit_list *new_list = xmalloc(sizeof(struct commit_list)); |
dd97f850 DB |
135 | new_list->item = item; |
136 | new_list->next = *list_p; | |
137 | *list_p = new_list; | |
ac5155ef | 138 | return new_list; |
dd97f850 DB |
139 | } |
140 | ||
175785e5 DB |
141 | void free_commit_list(struct commit_list *list) |
142 | { | |
143 | while (list) { | |
144 | struct commit_list *temp = list; | |
145 | list = temp->next; | |
146 | free(temp); | |
147 | } | |
148 | } | |
dd97f850 | 149 | |
a3437b8c | 150 | void insert_by_date(struct commit_list **list, struct commit *item) |
dd97f850 DB |
151 | { |
152 | struct commit_list **pp = list; | |
153 | struct commit_list *p; | |
154 | while ((p = *pp) != NULL) { | |
155 | if (p->item->date < item->date) { | |
156 | break; | |
157 | } | |
158 | pp = &p->next; | |
159 | } | |
160 | commit_list_insert(item, pp); | |
161 | } | |
162 | ||
163 | ||
164 | void sort_by_date(struct commit_list **list) | |
165 | { | |
166 | struct commit_list *ret = NULL; | |
167 | while (*list) { | |
168 | insert_by_date(&ret, (*list)->item); | |
169 | *list = (*list)->next; | |
170 | } | |
171 | *list = ret; | |
172 | } | |
173 | ||
58e28af6 DB |
174 | struct commit *pop_most_recent_commit(struct commit_list **list, |
175 | unsigned int mark) | |
dd97f850 DB |
176 | { |
177 | struct commit *ret = (*list)->item; | |
178 | struct commit_list *parents = ret->parents; | |
179 | struct commit_list *old = *list; | |
180 | ||
181 | *list = (*list)->next; | |
182 | free(old); | |
183 | ||
184 | while (parents) { | |
4056c091 | 185 | struct commit *commit = parents->item; |
58e28af6 DB |
186 | parse_commit(commit); |
187 | if (!(commit->object.flags & mark)) { | |
188 | commit->object.flags |= mark; | |
4056c091 LT |
189 | insert_by_date(list, commit); |
190 | } | |
dd97f850 DB |
191 | parents = parents->next; |
192 | } | |
193 | return ret; | |
194 | } | |
e3bc7a3b LT |
195 | |
196 | /* | |
197 | * Generic support for pretty-printing the header | |
198 | */ | |
199 | static int get_one_line(const char *msg, unsigned long len) | |
200 | { | |
201 | int ret = 0; | |
202 | ||
203 | while (len--) { | |
204 | char c = *msg++; | |
205 | ret++; | |
206 | if (c == '\n') | |
207 | break; | |
208 | if (!c) | |
209 | return 0; | |
210 | } | |
211 | return ret; | |
212 | } | |
213 | ||
9b66ec04 | 214 | static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf, const char *line) |
e3bc7a3b LT |
215 | { |
216 | char *date; | |
217 | unsigned int namelen; | |
218 | unsigned long time; | |
000182ea | 219 | int tz, ret; |
e3bc7a3b | 220 | |
e3bc7a3b LT |
221 | date = strchr(line, '>'); |
222 | if (!date) | |
223 | return 0; | |
224 | namelen = ++date - line; | |
225 | time = strtoul(date, &date, 10); | |
226 | tz = strtol(date, NULL, 10); | |
227 | ||
9b66ec04 | 228 | ret = sprintf(buf, "%s: %.*s\n", what, namelen, line); |
000182ea LT |
229 | if (fmt == CMIT_FMT_MEDIUM) |
230 | ret += sprintf(buf + ret, "Date: %s\n", show_date(time, tz)); | |
231 | return ret; | |
232 | } | |
233 | ||
234 | static int is_empty_line(const char *line, int len) | |
235 | { | |
236 | while (len && isspace(line[len-1])) | |
237 | len--; | |
238 | return !len; | |
e3bc7a3b LT |
239 | } |
240 | ||
28342a5d LT |
241 | static int add_parent_info(enum cmit_fmt fmt, char *buf, const char *line, int parents) |
242 | { | |
243 | int offset = 0; | |
244 | switch (parents) { | |
245 | case 1: | |
246 | break; | |
247 | case 2: | |
248 | /* Go back to the previous line: 40 characters of previous parent, and one '\n' */ | |
249 | offset = sprintf(buf, "Merge: %.40s\n", line-41); | |
250 | /* Fallthrough */ | |
251 | default: | |
252 | /* Replace the previous '\n' with a space */ | |
253 | buf[offset-1] = ' '; | |
254 | offset += sprintf(buf + offset, "%.40s\n", line+7); | |
255 | } | |
256 | return offset; | |
257 | } | |
258 | ||
000182ea | 259 | unsigned long pretty_print_commit(enum cmit_fmt fmt, const char *msg, unsigned long len, char *buf, unsigned long space) |
e3bc7a3b | 260 | { |
000182ea | 261 | int hdr = 1, body = 0; |
e3bc7a3b | 262 | unsigned long offset = 0; |
28342a5d | 263 | int parents = 0; |
e3bc7a3b LT |
264 | |
265 | for (;;) { | |
266 | const char *line = msg; | |
267 | int linelen = get_one_line(msg, len); | |
268 | ||
269 | if (!linelen) | |
270 | break; | |
271 | ||
272 | /* | |
273 | * We want some slop for indentation and a possible | |
274 | * final "...". Thus the "+ 20". | |
275 | */ | |
276 | if (offset + linelen + 20 > space) { | |
277 | memcpy(buf + offset, " ...\n", 8); | |
278 | offset += 8; | |
279 | break; | |
280 | } | |
281 | ||
282 | msg += linelen; | |
283 | len -= linelen; | |
e3bc7a3b | 284 | if (hdr) { |
000182ea LT |
285 | if (linelen == 1) { |
286 | hdr = 0; | |
287 | buf[offset++] = '\n'; | |
288 | continue; | |
289 | } | |
290 | if (fmt == CMIT_FMT_RAW) { | |
291 | memcpy(buf + offset, line, linelen); | |
292 | offset += linelen; | |
293 | continue; | |
294 | } | |
28342a5d LT |
295 | if (!memcmp(line, "parent ", 7)) { |
296 | if (linelen != 48) | |
297 | die("bad parent line in commit"); | |
298 | offset += add_parent_info(fmt, buf + offset, line, ++parents); | |
299 | } | |
e3bc7a3b | 300 | if (!memcmp(line, "author ", 7)) |
9b66ec04 LT |
301 | offset += add_user_info("Author", fmt, buf + offset, line + 7); |
302 | if (fmt == CMIT_FMT_FULL) { | |
303 | if (!memcmp(line, "committer ", 10)) | |
304 | offset += add_user_info("Commit", fmt, buf + offset, line + 10); | |
305 | } | |
e3bc7a3b LT |
306 | continue; |
307 | } | |
000182ea LT |
308 | |
309 | if (is_empty_line(line, linelen)) { | |
310 | if (!body) | |
311 | continue; | |
312 | if (fmt == CMIT_FMT_SHORT) | |
313 | break; | |
314 | } else { | |
315 | body = 1; | |
316 | } | |
e3bc7a3b LT |
317 | memset(buf + offset, ' ', 4); |
318 | memcpy(buf + offset + 4, line, linelen); | |
319 | offset += linelen + 4; | |
320 | } | |
321 | /* Make sure there is an EOLN */ | |
322 | if (buf[offset - 1] != '\n') | |
323 | buf[offset++] = '\n'; | |
324 | buf[offset] = '\0'; | |
325 | return offset; | |
326 | } | |
a3437b8c JS |
327 | |
328 | struct commit *pop_commit(struct commit_list **stack) | |
329 | { | |
330 | struct commit_list *top = *stack; | |
331 | struct commit *item = top ? top->item : NULL; | |
332 | ||
333 | if (top) { | |
334 | *stack = top->next; | |
335 | free(top); | |
336 | } | |
337 | return item; | |
338 | } | |
339 | ||
340 | int count_parents(struct commit * commit) | |
341 | { | |
342 | int count = 0; | |
343 | struct commit_list * parents = commit->parents; | |
344 | for (count=0;parents; parents=parents->next,count++) | |
345 | ; | |
346 | return count; | |
347 | } | |
348 |