1#include "cache.h"
2#include "tag.h"
3#include "commit.h"
4#include "pkt-line.h"
5#include "utf8.h"
6#include "interpolate.h"
7#include "diff.h"
8#include "revision.h"
9int save_commit_buffer = 1;
11struct sort_node
13{
14 /*
15 * the number of children of the associated commit
16 * that also occur in the list being sorted.
17 */
18 unsigned int indegree;
19 /*
21 * reference to original list item that we will re-use
22 * on output.
23 */
24 struct commit_list * list_item;
25};
27const char *commit_type = "commit";
29static struct cmt_fmt_map {
31 const char *n;
32 size_t cmp_len;
33 enum cmit_fmt v;
34} cmt_fmts[] = {
35 { "raw", 1, CMIT_FMT_RAW },
36 { "medium", 1, CMIT_FMT_MEDIUM },
37 { "short", 1, CMIT_FMT_SHORT },
38 { "email", 1, CMIT_FMT_EMAIL },
39 { "full", 5, CMIT_FMT_FULL },
40 { "fuller", 5, CMIT_FMT_FULLER },
41 { "oneline", 1, CMIT_FMT_ONELINE },
42 { "format:", 7, CMIT_FMT_USERFORMAT},
43};
44static char *user_format;
46enum cmit_fmt get_commit_format(const char *arg)
48{
49 int i;
50 if (!arg || !*arg)
52 return CMIT_FMT_DEFAULT;
53 if (*arg == '=')
54 arg++;
55 if (!prefixcmp(arg, "format:")) {
56 if (user_format)
57 free(user_format);
58 user_format = xstrdup(arg + 7);
59 return CMIT_FMT_USERFORMAT;
60 }
61 for (i = 0; i < ARRAY_SIZE(cmt_fmts); i++) {
62 if (!strncmp(arg, cmt_fmts[i].n, cmt_fmts[i].cmp_len) &&
63 !strncmp(arg, cmt_fmts[i].n, strlen(arg)))
64 return cmt_fmts[i].v;
65 }
66 die("invalid --pretty format: %s", arg);
68}
69static struct commit *check_commit(struct object *obj,
71 const unsigned char *sha1,
72 int quiet)
73{
74 if (obj->type != OBJ_COMMIT) {
75 if (!quiet)
76 error("Object %s is a %s, not a commit",
77 sha1_to_hex(sha1), typename(obj->type));
78 return NULL;
79 }
80 return (struct commit *) obj;
81}
82struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
84 int quiet)
85{
86 struct object *obj = deref_tag(parse_object(sha1), NULL, 0);
87 if (!obj)
89 return NULL;
90 return check_commit(obj, sha1, quiet);
91}
92struct commit *lookup_commit_reference(const unsigned char *sha1)
94{
95 return lookup_commit_reference_gently(sha1, 0);
96}
97struct commit *lookup_commit(const unsigned char *sha1)
99{
100 struct object *obj = lookup_object(sha1);
101 if (!obj)
102 return create_object(sha1, OBJ_COMMIT, alloc_commit_node());
103 if (!obj->type)
104 obj->type = OBJ_COMMIT;
105 return check_commit(obj, sha1, 0);
106}
107static unsigned long parse_commit_date(const char *buf)
109{
110 unsigned long date;
111 if (memcmp(buf, "author", 6))
113 return 0;
114 while (*buf++ != '\n')
115 /* nada */;
116 if (memcmp(buf, "committer", 9))
117 return 0;
118 while (*buf++ != '>')
119 /* nada */;
120 date = strtoul(buf, NULL, 10);
121 if (date == ULONG_MAX)
122 date = 0;
123 return date;
124}
125static struct commit_graft **commit_graft;
127static int commit_graft_alloc, commit_graft_nr;
128static int commit_graft_pos(const unsigned char *sha1)
130{
131 int lo, hi;
132 lo = 0;
133 hi = commit_graft_nr;
134 while (lo < hi) {
135 int mi = (lo + hi) / 2;
136 struct commit_graft *graft = commit_graft[mi];
137 int cmp = hashcmp(sha1, graft->sha1);
138 if (!cmp)
139 return mi;
140 if (cmp < 0)
141 hi = mi;
142 else
143 lo = mi + 1;
144 }
145 return -lo - 1;
146}
147int register_commit_graft(struct commit_graft *graft, int ignore_dups)
149{
150 int pos = commit_graft_pos(graft->sha1);
151 if (0 <= pos) {
153 if (ignore_dups)
154 free(graft);
155 else {
156 free(commit_graft[pos]);
157 commit_graft[pos] = graft;
158 }
159 return 1;
160 }
161 pos = -pos - 1;
162 if (commit_graft_alloc <= ++commit_graft_nr) {
163 commit_graft_alloc = alloc_nr(commit_graft_alloc);
164 commit_graft = xrealloc(commit_graft,
165 sizeof(*commit_graft) *
166 commit_graft_alloc);
167 }
168 if (pos < commit_graft_nr)
169 memmove(commit_graft + pos + 1,
170 commit_graft + pos,
171 (commit_graft_nr - pos - 1) *
172 sizeof(*commit_graft));
173 commit_graft[pos] = graft;
174 return 0;
175}
176struct commit_graft *read_graft_line(char *buf, int len)
178{
179 /* The format is just "Commit Parent1 Parent2 ...\n" */
180 int i;
181 struct commit_graft *graft = NULL;
182 if (buf[len-1] == '\n')
184 buf[--len] = 0;
185 if (buf[0] == '#' || buf[0] == '\0')
186 return NULL;
187 if ((len + 1) % 41) {
188 bad_graft_data:
189 error("bad graft data: %s", buf);
190 free(graft);
191 return NULL;
192 }
193 i = (len + 1) / 41 - 1;
194 graft = xmalloc(sizeof(*graft) + 20 * i);
195 graft->nr_parent = i;
196 if (get_sha1_hex(buf, graft->sha1))
197 goto bad_graft_data;
198 for (i = 40; i < len; i += 41) {
199 if (buf[i] != ' ')
200 goto bad_graft_data;
201 if (get_sha1_hex(buf + i + 1, graft->parent[i/41]))
202 goto bad_graft_data;
203 }
204 return graft;
205}
206int read_graft_file(const char *graft_file)
208{
209 FILE *fp = fopen(graft_file, "r");
210 char buf[1024];
211 if (!fp)
212 return -1;
213 while (fgets(buf, sizeof(buf), fp)) {
214 /* The format is just "Commit Parent1 Parent2 ...\n" */
215 int len = strlen(buf);
216 struct commit_graft *graft = read_graft_line(buf, len);
217 if (!graft)
218 continue;
219 if (register_commit_graft(graft, 1))
220 error("duplicate graft data: %s", buf);
221 }
222 fclose(fp);
223 return 0;
224}
225static void prepare_commit_graft(void)
227{
228 static int commit_graft_prepared;
229 char *graft_file;
230 if (commit_graft_prepared)
232 return;
233 graft_file = get_graft_file();
234 read_graft_file(graft_file);
235 /* make sure shallows are read */
236 is_repository_shallow();
237 commit_graft_prepared = 1;
238}
239static struct commit_graft *lookup_commit_graft(const unsigned char *sha1)
241{
242 int pos;
243 prepare_commit_graft();
244 pos = commit_graft_pos(sha1);
245 if (pos < 0)
246 return NULL;
247 return commit_graft[pos];
248}
249int write_shallow_commits(int fd, int use_pack_protocol)
251{
252 int i, count = 0;
253 for (i = 0; i < commit_graft_nr; i++)
254 if (commit_graft[i]->nr_parent < 0) {
255 const char *hex =
256 sha1_to_hex(commit_graft[i]->sha1);
257 count++;
258 if (use_pack_protocol)
259 packet_write(fd, "shallow %s", hex);
260 else {
261 if (write_in_full(fd, hex, 40) != 40)
262 break;
263 if (write_in_full(fd, "\n", 1) != 1)
264 break;
265 }
266 }
267 return count;
268}
269int unregister_shallow(const unsigned char *sha1)
271{
272 int pos = commit_graft_pos(sha1);
273 if (pos < 0)
274 return -1;
275 if (pos + 1 < commit_graft_nr)
276 memcpy(commit_graft + pos, commit_graft + pos + 1,
277 sizeof(struct commit_graft *)
278 * (commit_graft_nr - pos - 1));
279 commit_graft_nr--;
280 return 0;
281}
282int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size)
284{
285 char *tail = buffer;
286 char *bufptr = buffer;
287 unsigned char parent[20];
288 struct commit_list **pptr;
289 struct commit_graft *graft;
290 unsigned n_refs = 0;
291 if (item->object.parsed)
293 return 0;
294 item->object.parsed = 1;
295 tail += size;
296 if (tail <= bufptr + 5 || memcmp(bufptr, "tree ", 5))
297 return error("bogus commit object %s", sha1_to_hex(item->object.sha1));
298 if (tail <= bufptr + 45 || get_sha1_hex(bufptr + 5, parent) < 0)
299 return error("bad tree pointer in commit %s",
300 sha1_to_hex(item->object.sha1));
301 item->tree = lookup_tree(parent);
302 if (item->tree)
303 n_refs++;
304 bufptr += 46; /* "tree " + "hex sha1" + "\n" */
305 pptr = &item->parents;
306 graft = lookup_commit_graft(item->object.sha1);
308 while (bufptr + 48 < tail && !memcmp(bufptr, "parent ", 7)) {
309 struct commit *new_parent;
310 if (tail <= bufptr + 48 ||
312 get_sha1_hex(bufptr + 7, parent) ||
313 bufptr[47] != '\n')
314 return error("bad parents in commit %s", sha1_to_hex(item->object.sha1));
315 bufptr += 48;
316 if (graft)
317 continue;
318 new_parent = lookup_commit(parent);
319 if (new_parent) {
320 pptr = &commit_list_insert(new_parent, pptr)->next;
321 n_refs++;
322 }
323 }
324 if (graft) {
325 int i;
326 struct commit *new_parent;
327 for (i = 0; i < graft->nr_parent; i++) {
328 new_parent = lookup_commit(graft->parent[i]);
329 if (!new_parent)
330 continue;
331 pptr = &commit_list_insert(new_parent, pptr)->next;
332 n_refs++;
333 }
334 }
335 item->date = parse_commit_date(bufptr);
336 if (track_object_refs) {
338 unsigned i = 0;
339 struct commit_list *p;
340 struct object_refs *refs = alloc_object_refs(n_refs);
341 if (item->tree)
342 refs->ref[i++] = &item->tree->object;
343 for (p = item->parents; p; p = p->next)
344 refs->ref[i++] = &p->item->object;
345 set_object_refs(&item->object, refs);
346 }
347 return 0;
349}
350int parse_commit(struct commit *item)
352{
353 enum object_type type;
354 void *buffer;
355 unsigned long size;
356 int ret;
357 if (item->object.parsed)
359 return 0;
360 buffer = read_sha1_file(item->object.sha1, &type, &size);
361 if (!buffer)
362 return error("Could not read %s",
363 sha1_to_hex(item->object.sha1));
364 if (type != OBJ_COMMIT) {
365 free(buffer);
366 return error("Object %s not a commit",
367 sha1_to_hex(item->object.sha1));
368 }
369 ret = parse_commit_buffer(item, buffer, size);
370 if (save_commit_buffer && !ret) {
371 item->buffer = buffer;
372 return 0;
373 }
374 free(buffer);
375 return ret;
376}
377struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p)
379{
380 struct commit_list *new_list = xmalloc(sizeof(struct commit_list));
381 new_list->item = item;
382 new_list->next = *list_p;
383 *list_p = new_list;
384 return new_list;
385}
386void free_commit_list(struct commit_list *list)
388{
389 while (list) {
390 struct commit_list *temp = list;
391 list = temp->next;
392 free(temp);
393 }
394}
395struct commit_list * insert_by_date(struct commit *item, struct commit_list **list)
397{
398 struct commit_list **pp = list;
399 struct commit_list *p;
400 while ((p = *pp) != NULL) {
401 if (p->item->date < item->date) {
402 break;
403 }
404 pp = &p->next;
405 }
406 return commit_list_insert(item, pp);
407}
408void sort_by_date(struct commit_list **list)
411{
412 struct commit_list *ret = NULL;
413 while (*list) {
414 insert_by_date((*list)->item, &ret);
415 *list = (*list)->next;
416 }
417 *list = ret;
418}
419struct commit *pop_most_recent_commit(struct commit_list **list,
421 unsigned int mark)
422{
423 struct commit *ret = (*list)->item;
424 struct commit_list *parents = ret->parents;
425 struct commit_list *old = *list;
426 *list = (*list)->next;
428 free(old);
429 while (parents) {
431 struct commit *commit = parents->item;
432 parse_commit(commit);
433 if (!(commit->object.flags & mark)) {
434 commit->object.flags |= mark;
435 insert_by_date(commit, list);
436 }
437 parents = parents->next;
438 }
439 return ret;
440}
441void clear_commit_marks(struct commit *commit, unsigned int mark)
443{
444 struct commit_list *parents;
445 commit->object.flags &= ~mark;
447 parents = commit->parents;
448 while (parents) {
449 struct commit *parent = parents->item;
450 /* Have we already cleared this? */
452 if (mark & parent->object.flags)
453 clear_commit_marks(parent, mark);
454 parents = parents->next;
455 }
456}
457/*
459 * Generic support for pretty-printing the header
460 */
461static int get_one_line(const char *msg, unsigned long len)
462{
463 int ret = 0;
464 while (len--) {
466 char c = *msg++;
467 if (!c)
468 break;
469 ret++;
470 if (c == '\n')
471 break;
472 }
473 return ret;
474}
475/* High bit set, or ISO-2022-INT */
477static int non_ascii(int ch)
478{
479 ch = (ch & 0xff);
480 return ((ch & 0x80) || (ch == 0x1b));
481}
482static int is_rfc2047_special(char ch)
484{
485 return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
486}
487static int add_rfc2047(char *buf, const char *line, int len,
489 const char *encoding)
490{
491 char *bp = buf;
492 int i, needquote;
493 char q_encoding[128];
494 const char *q_encoding_fmt = "=?%s?q?";
495 for (i = needquote = 0; !needquote && i < len; i++) {
497 int ch = line[i];
498 if (non_ascii(ch))
499 needquote++;
500 if ((i + 1 < len) &&
501 (ch == '=' && line[i+1] == '?'))
502 needquote++;
503 }
504 if (!needquote)
505 return sprintf(buf, "%.*s", len, line);
506 i = snprintf(q_encoding, sizeof(q_encoding), q_encoding_fmt, encoding);
508 if (sizeof(q_encoding) < i)
509 die("Insanely long encoding name %s", encoding);
510 memcpy(bp, q_encoding, i);
511 bp += i;
512 for (i = 0; i < len; i++) {
513 unsigned ch = line[i] & 0xFF;
514 /*
515 * We encode ' ' using '=20' even though rfc2047
516 * allows using '_' for readability. Unfortunately,
517 * many programs do not understand this and just
518 * leave the underscore in place.
519 */
520 if (is_rfc2047_special(ch) || ch == ' ') {
521 sprintf(bp, "=%02X", ch);
522 bp += 3;
523 }
524 else
525 *bp++ = ch;
526 }
527 memcpy(bp, "?=", 2);
528 bp += 2;
529 return bp - buf;
530}
531static unsigned long bound_rfc2047(unsigned long len, const char *encoding)
533{
534 /* upper bound of q encoded string of length 'len' */
535 unsigned long elen = strlen(encoding);
536 return len * 3 + elen + 100;
538}
539static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf,
541 const char *line, enum date_mode dmode,
542 const char *encoding)
543{
544 char *date;
545 int namelen;
546 unsigned long time;
547 int tz, ret;
548 const char *filler = " ";
549 if (fmt == CMIT_FMT_ONELINE)
551 return 0;
552 date = strchr(line, '>');
553 if (!date)
554 return 0;
555 namelen = ++date - line;
556 time = strtoul(date, &date, 10);
557 tz = strtol(date, NULL, 10);
558 if (fmt == CMIT_FMT_EMAIL) {
560 char *name_tail = strchr(line, '<');
561 int display_name_length;
562 if (!name_tail)
563 return 0;
564 while (line < name_tail && isspace(name_tail[-1]))
565 name_tail--;
566 display_name_length = name_tail - line;
567 filler = "";
568 strcpy(buf, "From: ");
569 ret = strlen(buf);
570 ret += add_rfc2047(buf + ret, line, display_name_length,
571 encoding);
572 memcpy(buf + ret, name_tail, namelen - display_name_length);
573 ret += namelen - display_name_length;
574 buf[ret++] = '\n';
575 }
576 else {
577 ret = sprintf(buf, "%s: %.*s%.*s\n", what,
578 (fmt == CMIT_FMT_FULLER) ? 4 : 0,
579 filler, namelen, line);
580 }
581 switch (fmt) {
582 case CMIT_FMT_MEDIUM:
583 ret += sprintf(buf + ret, "Date: %s\n",
584 show_date(time, tz, dmode));
585 break;
586 case CMIT_FMT_EMAIL:
587 ret += sprintf(buf + ret, "Date: %s\n",
588 show_date(time, tz, DATE_RFC2822));
589 break;
590 case CMIT_FMT_FULLER:
591 ret += sprintf(buf + ret, "%sDate: %s\n", what,
592 show_date(time, tz, dmode));
593 break;
594 default:
595 /* notin' */
596 break;
597 }
598 return ret;
599}
600static int is_empty_line(const char *line, int *len_p)
602{
603 int len = *len_p;
604 while (len && isspace(line[len-1]))
605 len--;
606 *len_p = len;
607 return !len;
608}
609static int add_merge_info(enum cmit_fmt fmt, char *buf, const struct commit *commit, int abbrev)
611{
612 struct commit_list *parent = commit->parents;
613 int offset;
614 if ((fmt == CMIT_FMT_ONELINE) || (fmt == CMIT_FMT_EMAIL) ||
616 !parent || !parent->next)
617 return 0;
618 offset = sprintf(buf, "Merge:");
620 while (parent) {
622 struct commit *p = parent->item;
623 const char *hex = NULL;
624 const char *dots;
625 if (abbrev)
626 hex = find_unique_abbrev(p->object.sha1, abbrev);
627 if (!hex)
628 hex = sha1_to_hex(p->object.sha1);
629 dots = (abbrev && strlen(hex) != 40) ? "..." : "";
630 parent = parent->next;
631 offset += sprintf(buf + offset, " %s%s", hex, dots);
633 }
634 buf[offset++] = '\n';
635 return offset;
636}
637static char *get_header(const struct commit *commit, const char *key)
639{
640 int key_len = strlen(key);
641 const char *line = commit->buffer;
642 for (;;) {
644 const char *eol = strchr(line, '\n'), *next;
645 if (line == eol)
647 return NULL;
648 if (!eol) {
649 eol = line + strlen(line);
650 next = NULL;
651 } else
652 next = eol + 1;
653 if (eol - line > key_len &&
654 !strncmp(line, key, key_len) &&
655 line[key_len] == ' ') {
656 int len = eol - line - key_len;
657 char *ret = xmalloc(len);
658 memcpy(ret, line + key_len + 1, len - 1);
659 ret[len - 1] = '\0';
660 return ret;
661 }
662 line = next;
663 }
664}
665static char *replace_encoding_header(char *buf, const char *encoding)
667{
668 char *encoding_header = strstr(buf, "\nencoding ");
669 char *header_end = strstr(buf, "\n\n");
670 char *end_of_encoding_header;
671 int encoding_header_pos;
672 int encoding_header_len;
673 int new_len;
674 int need_len;
675 int buflen = strlen(buf) + 1;
676 if (!header_end)
678 header_end = buf + buflen;
679 if (!encoding_header || encoding_header >= header_end)
680 return buf;
681 encoding_header++;
682 end_of_encoding_header = strchr(encoding_header, '\n');
683 if (!end_of_encoding_header)
684 return buf; /* should not happen but be defensive */
685 end_of_encoding_header++;
686 encoding_header_len = end_of_encoding_header - encoding_header;
688 encoding_header_pos = encoding_header - buf;
689 if (is_encoding_utf8(encoding)) {
691 /* we have re-coded to UTF-8; drop the header */
692 memmove(encoding_header, end_of_encoding_header,
693 buflen - (encoding_header_pos + encoding_header_len));
694 return buf;
695 }
696 new_len = strlen(encoding);
697 need_len = new_len + strlen("encoding \n");
698 if (encoding_header_len < need_len) {
699 buf = xrealloc(buf, buflen + (need_len - encoding_header_len));
700 encoding_header = buf + encoding_header_pos;
701 end_of_encoding_header = encoding_header + encoding_header_len;
702 }
703 memmove(end_of_encoding_header + (need_len - encoding_header_len),
704 end_of_encoding_header,
705 buflen - (encoding_header_pos + encoding_header_len));
706 memcpy(encoding_header + 9, encoding, strlen(encoding));
707 encoding_header[9 + new_len] = '\n';
708 return buf;
709}
710static char *logmsg_reencode(const struct commit *commit,
712 const char *output_encoding)
713{
714 static const char *utf8 = "utf-8";
715 const char *use_encoding;
716 char *encoding;
717 char *out;
718 if (!*output_encoding)
720 return NULL;
721 encoding = get_header(commit, "encoding");
722 use_encoding = encoding ? encoding : utf8;
723 if (!strcmp(use_encoding, output_encoding))
724 if (encoding) /* we'll strip encoding header later */
725 out = xstrdup(commit->buffer);
726 else
727 return NULL; /* nothing to do */
728 else
729 out = reencode_string(commit->buffer,
730 output_encoding, use_encoding);
731 if (out)
732 out = replace_encoding_header(out, output_encoding);
733 free(encoding);
735 return out;
736}
737static void fill_person(struct interp *table, const char *msg, int len)
739{
740 int start, end, tz = 0;
741 unsigned long date;
742 char *ep;
743 /* parse name */
745 for (end = 0; end < len && msg[end] != '<'; end++)
746 ; /* do nothing */
747 start = end + 1;
748 while (end > 0 && isspace(msg[end - 1]))
749 end--;
750 table[0].value = xstrndup(msg, end);
751 if (start >= len)
753 return;
754 /* parse email */
756 for (end = start + 1; end < len && msg[end] != '>'; end++)
757 ; /* do nothing */
758 if (end >= len)
760 return;
761 table[1].value = xstrndup(msg + start, end - start);
763 /* parse date */
765 for (start = end + 1; start < len && isspace(msg[start]); start++)
766 ; /* do nothing */
767 if (start >= len)
768 return;
769 date = strtoul(msg + start, &ep, 10);
770 if (msg + start == ep)
771 return;
772 table[5].value = xstrndup(msg + start, ep - (msg + start));
774 /* parse tz */
776 for (start = ep - msg + 1; start < len && isspace(msg[start]); start++)
777 ; /* do nothing */
778 if (start + 1 < len) {
779 tz = strtoul(msg + start + 1, NULL, 10);
780 if (msg[start] == '-')
781 tz = -tz;
782 }
783 interp_set_entry(table, 2, show_date(date, tz, DATE_NORMAL));
785 interp_set_entry(table, 3, show_date(date, tz, DATE_RFC2822));
786 interp_set_entry(table, 4, show_date(date, tz, DATE_RELATIVE));
787 interp_set_entry(table, 6, show_date(date, tz, DATE_ISO8601));
788}
789long format_commit_message(const struct commit *commit, const void *format,
791 char **buf_p, unsigned long *space_p)
792{
793 struct interp table[] = {
794 { "%H" }, /* commit hash */
795 { "%h" }, /* abbreviated commit hash */
796 { "%T" }, /* tree hash */
797 { "%t" }, /* abbreviated tree hash */
798 { "%P" }, /* parent hashes */
799 { "%p" }, /* abbreviated parent hashes */
800 { "%an" }, /* author name */
801 { "%ae" }, /* author email */
802 { "%ad" }, /* author date */
803 { "%aD" }, /* author date, RFC2822 style */
804 { "%ar" }, /* author date, relative */
805 { "%at" }, /* author date, UNIX timestamp */
806 { "%ai" }, /* author date, ISO 8601 */
807 { "%cn" }, /* committer name */
808 { "%ce" }, /* committer email */
809 { "%cd" }, /* committer date */
810 { "%cD" }, /* committer date, RFC2822 style */
811 { "%cr" }, /* committer date, relative */
812 { "%ct" }, /* committer date, UNIX timestamp */
813 { "%ci" }, /* committer date, ISO 8601 */
814 { "%e" }, /* encoding */
815 { "%s" }, /* subject */
816 { "%b" }, /* body */
817 { "%Cred" }, /* red */
818 { "%Cgreen" }, /* green */
819 { "%Cblue" }, /* blue */
820 { "%Creset" }, /* reset color */
821 { "%n" }, /* newline */
822 { "%m" }, /* left/right/bottom */
823 };
824 enum interp_index {
825 IHASH = 0, IHASH_ABBREV,
826 ITREE, ITREE_ABBREV,
827 IPARENTS, IPARENTS_ABBREV,
828 IAUTHOR_NAME, IAUTHOR_EMAIL,
829 IAUTHOR_DATE, IAUTHOR_DATE_RFC2822, IAUTHOR_DATE_RELATIVE,
830 IAUTHOR_TIMESTAMP, IAUTHOR_ISO8601,
831 ICOMMITTER_NAME, ICOMMITTER_EMAIL,
832 ICOMMITTER_DATE, ICOMMITTER_DATE_RFC2822,
833 ICOMMITTER_DATE_RELATIVE, ICOMMITTER_TIMESTAMP,
834 ICOMMITTER_ISO8601,
835 IENCODING,
836 ISUBJECT,
837 IBODY,
838 IRED, IGREEN, IBLUE, IRESET_COLOR,
839 INEWLINE,
840 ILEFT_RIGHT,
841 };
842 struct commit_list *p;
843 char parents[1024];
844 int i;
845 enum { HEADER, SUBJECT, BODY } state;
846 const char *msg = commit->buffer;
847 if (ILEFT_RIGHT + 1 != ARRAY_SIZE(table))
849 die("invalid interp table!");
850 /* these are independent of the commit */
852 interp_set_entry(table, IRED, "\033[31m");
853 interp_set_entry(table, IGREEN, "\033[32m");
854 interp_set_entry(table, IBLUE, "\033[34m");
855 interp_set_entry(table, IRESET_COLOR, "\033[m");
856 interp_set_entry(table, INEWLINE, "\n");
857 /* these depend on the commit */
859 if (!commit->object.parsed)
860 parse_object(commit->object.sha1);
861 interp_set_entry(table, IHASH, sha1_to_hex(commit->object.sha1));
862 interp_set_entry(table, IHASH_ABBREV,
863 find_unique_abbrev(commit->object.sha1,
864 DEFAULT_ABBREV));
865 interp_set_entry(table, ITREE, sha1_to_hex(commit->tree->object.sha1));
866 interp_set_entry(table, ITREE_ABBREV,
867 find_unique_abbrev(commit->tree->object.sha1,
868 DEFAULT_ABBREV));
869 interp_set_entry(table, ILEFT_RIGHT,
870 (commit->object.flags & BOUNDARY)
871 ? "-"
872 : (commit->object.flags & SYMMETRIC_LEFT)
873 ? "<"
874 : ">");
875 parents[1] = 0;
877 for (i = 0, p = commit->parents;
878 p && i < sizeof(parents) - 1;
879 p = p->next)
880 i += snprintf(parents + i, sizeof(parents) - i - 1, " %s",
881 sha1_to_hex(p->item->object.sha1));
882 interp_set_entry(table, IPARENTS, parents + 1);
883 parents[1] = 0;
885 for (i = 0, p = commit->parents;
886 p && i < sizeof(parents) - 1;
887 p = p->next)
888 i += snprintf(parents + i, sizeof(parents) - i - 1, " %s",
889 find_unique_abbrev(p->item->object.sha1,
890 DEFAULT_ABBREV));
891 interp_set_entry(table, IPARENTS_ABBREV, parents + 1);
892 for (i = 0, state = HEADER; msg[i] && state < BODY; i++) {
894 int eol;
895 for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
896 ; /* do nothing */
897 if (state == SUBJECT) {
899 table[ISUBJECT].value = xstrndup(msg + i, eol - i);
900 i = eol;
901 }
902 if (i == eol) {
903 state++;
904 /* strip empty lines */
905 while (msg[eol + 1] == '\n')
906 eol++;
907 } else if (!prefixcmp(msg + i, "author "))
908 fill_person(table + IAUTHOR_NAME,
909 msg + i + 7, eol - i - 7);
910 else if (!prefixcmp(msg + i, "committer "))
911 fill_person(table + ICOMMITTER_NAME,
912 msg + i + 10, eol - i - 10);
913 else if (!prefixcmp(msg + i, "encoding "))
914 table[IENCODING].value =
915 xstrndup(msg + i + 9, eol - i - 9);
916 i = eol;
917 }
918 if (msg[i])
919 table[IBODY].value = xstrdup(msg + i);
920 for (i = 0; i < ARRAY_SIZE(table); i++)
921 if (!table[i].value)
922 interp_set_entry(table, i, "<unknown>");
923 do {
925 char *buf = *buf_p;
926 unsigned long space = *space_p;
927 space = interpolate(buf, space, format,
929 table, ARRAY_SIZE(table));
930 if (!space)
931 break;
932 buf = xrealloc(buf, space);
933 *buf_p = buf;
934 *space_p = space;
935 } while (1);
936 interp_clear_table(table, ARRAY_SIZE(table));
937 return strlen(*buf_p);
939}
940static void pp_header(enum cmit_fmt fmt,
942 int abbrev,
943 enum date_mode dmode,
944 const char *encoding,
945 const struct commit *commit,
946 const char **msg_p,
947 unsigned long *len_p,
948 unsigned long *ofs_p,
949 char **buf_p,
950 unsigned long *space_p)
951{
952 int parents_shown = 0;
953 for (;;) {
955 const char *line = *msg_p;
956 char *dst;
957 int linelen = get_one_line(*msg_p, *len_p);
958 unsigned long len;
959 if (!linelen)
961 return;
962 *msg_p += linelen;
963 *len_p -= linelen;
964 if (linelen == 1)
966 /* End of header */
967 return;
968 ALLOC_GROW(*buf_p, linelen + *ofs_p + 20, *space_p);
970 dst = *buf_p + *ofs_p;
971 if (fmt == CMIT_FMT_RAW) {
973 memcpy(dst, line, linelen);
974 *ofs_p += linelen;
975 continue;
976 }
977 if (!memcmp(line, "parent ", 7)) {
979 if (linelen != 48)
980 die("bad parent line in commit");
981 continue;
982 }
983 if (!parents_shown) {
985 struct commit_list *parent;
986 int num;
987 for (parent = commit->parents, num = 0;
988 parent;
989 parent = parent->next, num++)
990 ;
991 /* with enough slop */
992 num = *ofs_p + num * 50 + 20;
993 ALLOC_GROW(*buf_p, num, *space_p);
994 dst = *buf_p + *ofs_p;
995 *ofs_p += add_merge_info(fmt, dst, commit, abbrev);
996 parents_shown = 1;
997 }
998 /*
1000 * MEDIUM == DEFAULT shows only author with dates.
1001 * FULL shows both authors but not dates.
1002 * FULLER shows both authors and dates.
1003 */
1004 if (!memcmp(line, "author ", 7)) {
1005 len = linelen;
1006 if (fmt == CMIT_FMT_EMAIL)
1007 len = bound_rfc2047(linelen, encoding);
1008 ALLOC_GROW(*buf_p, *ofs_p + len + 80, *space_p);
1009 dst = *buf_p + *ofs_p;
1010 *ofs_p += add_user_info("Author", fmt, dst,
1011 line + 7, dmode, encoding);
1012 }
1013 if (!memcmp(line, "committer ", 10) &&
1015 (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER)) {
1016 len = linelen;
1017 if (fmt == CMIT_FMT_EMAIL)
1018 len = bound_rfc2047(linelen, encoding);
1019 ALLOC_GROW(*buf_p, *ofs_p + len + 80, *space_p);
1020 dst = *buf_p + *ofs_p;
1021 *ofs_p += add_user_info("Commit", fmt, dst,
1022 line + 10, dmode, encoding);
1023 }
1024 }
1025}
1026static void pp_title_line(enum cmit_fmt fmt,
1028 const char **msg_p,
1029 unsigned long *len_p,
1030 unsigned long *ofs_p,
1031 char **buf_p,
1032 unsigned long *space_p,
1033 int indent,
1034 const char *subject,
1035 const char *after_subject,
1036 const char *encoding,
1037 int plain_non_ascii)
1038{
1039 char *title;
1040 unsigned long title_alloc, title_len;
1041 unsigned long len;
1042 title_len = 0;
1044 title_alloc = 80;
1045 title = xmalloc(title_alloc);
1046 for (;;) {
1047 const char *line = *msg_p;
1048 int linelen = get_one_line(line, *len_p);
1049 *msg_p += linelen;
1050 *len_p -= linelen;
1051 if (!linelen || is_empty_line(line, &linelen))
1053 break;
1054 if (title_alloc <= title_len + linelen + 2) {
1056 title_alloc = title_len + linelen + 80;
1057 title = xrealloc(title, title_alloc);
1058 }
1059 len = 0;
1060 if (title_len) {
1061 if (fmt == CMIT_FMT_EMAIL) {
1062 len++;
1063 title[title_len++] = '\n';
1064 }
1065 len++;
1066 title[title_len++] = ' ';
1067 }
1068 memcpy(title + title_len, line, linelen);
1069 title_len += linelen;
1070 }
1071 /* Enough slop for the MIME header and rfc2047 */
1073 len = bound_rfc2047(title_len, encoding)+ 1000;
1074 if (subject)
1075 len += strlen(subject);
1076 if (after_subject)
1077 len += strlen(after_subject);
1078 if (encoding)
1079 len += strlen(encoding);
1080 ALLOC_GROW(*buf_p, title_len + *ofs_p + len, *space_p);
1081 if (subject) {
1083 len = strlen(subject);
1084 memcpy(*buf_p + *ofs_p, subject, len);
1085 *ofs_p += len;
1086 *ofs_p += add_rfc2047(*buf_p + *ofs_p,
1087 title, title_len, encoding);
1088 } else {
1089 memcpy(*buf_p + *ofs_p, title, title_len);
1090 *ofs_p += title_len;
1091 }
1092 (*buf_p)[(*ofs_p)++] = '\n';
1093 if (plain_non_ascii) {
1094 const char *header_fmt =
1095 "MIME-Version: 1.0\n"
1096 "Content-Type: text/plain; charset=%s\n"
1097 "Content-Transfer-Encoding: 8bit\n";
1098 *ofs_p += snprintf(*buf_p + *ofs_p,
1099 *space_p - *ofs_p,
1100 header_fmt, encoding);
1101 }
1102 if (after_subject) {
1103 len = strlen(after_subject);
1104 memcpy(*buf_p + *ofs_p, after_subject, len);
1105 *ofs_p += len;
1106 }
1107 free(title);
1108 if (fmt == CMIT_FMT_EMAIL) {
1109 ALLOC_GROW(*buf_p, *ofs_p + 20, *space_p);
1110 (*buf_p)[(*ofs_p)++] = '\n';
1111 }
1112}
1113static void pp_remainder(enum cmit_fmt fmt,
1115 const char **msg_p,
1116 unsigned long *len_p,
1117 unsigned long *ofs_p,
1118 char **buf_p,
1119 unsigned long *space_p,
1120 int indent)
1121{
1122 int first = 1;
1123 for (;;) {
1124 const char *line = *msg_p;
1125 int linelen = get_one_line(line, *len_p);
1126 *msg_p += linelen;
1127 *len_p -= linelen;
1128 if (!linelen)
1130 break;
1131 if (is_empty_line(line, &linelen)) {
1133 if (first)
1134 continue;
1135 if (fmt == CMIT_FMT_SHORT)
1136 break;
1137 }
1138 first = 0;
1139 ALLOC_GROW(*buf_p, *ofs_p + linelen + indent + 20, *space_p);
1141 if (indent) {
1142 memset(*buf_p + *ofs_p, ' ', indent);
1143 *ofs_p += indent;
1144 }
1145 memcpy(*buf_p + *ofs_p, line, linelen);
1146 *ofs_p += linelen;
1147 (*buf_p)[(*ofs_p)++] = '\n';
1148 }
1149}
1150unsigned long pretty_print_commit(enum cmit_fmt fmt,
1152 const struct commit *commit,
1153 unsigned long len,
1154 char **buf_p, unsigned long *space_p,
1155 int abbrev, const char *subject,
1156 const char *after_subject,
1157 enum date_mode dmode)
1158{
1159 unsigned long offset = 0;
1160 unsigned long beginning_of_body;
1161 int indent = 4;
1162 const char *msg = commit->buffer;
1163 int plain_non_ascii = 0;
1164 char *reencoded;
1165 const char *encoding;
1166 char *buf;
1167 if (fmt == CMIT_FMT_USERFORMAT)
1169 return format_commit_message(commit, user_format, buf_p, space_p);
1170 encoding = (git_log_output_encoding
1172 ? git_log_output_encoding
1173 : git_commit_encoding);
1174 if (!encoding)
1175 encoding = "utf-8";
1176 reencoded = logmsg_reencode(commit, encoding);
1177 if (reencoded) {
1178 msg = reencoded;
1179 len = strlen(reencoded);
1180 }
1181 if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
1183 indent = 0;
1184 /* After-subject is used to pass in Content-Type: multipart
1186 * MIME header; in that case we do not have to do the
1187 * plaintext content type even if the commit message has
1188 * non 7-bit ASCII character. Otherwise, check if we need
1189 * to say this is not a 7-bit ASCII.
1190 */
1191 if (fmt == CMIT_FMT_EMAIL && !after_subject) {
1192 int i, ch, in_body;
1193 for (in_body = i = 0; (ch = msg[i]) && i < len; i++) {
1195 if (!in_body) {
1196 /* author could be non 7-bit ASCII but
1197 * the log may be so; skip over the
1198 * header part first.
1199 */
1200 if (ch == '\n' &&
1201 i + 1 < len && msg[i+1] == '\n')
1202 in_body = 1;
1203 }
1204 else if (non_ascii(ch)) {
1205 plain_non_ascii = 1;
1206 break;
1207 }
1208 }
1209 }
1210 pp_header(fmt, abbrev, dmode, encoding,
1212 commit, &msg, &len,
1213 &offset, buf_p, space_p);
1214 if (fmt != CMIT_FMT_ONELINE && !subject) {
1215 ALLOC_GROW(*buf_p, offset + 20, *space_p);
1216 (*buf_p)[offset++] = '\n';
1217 }
1218 /* Skip excess blank lines at the beginning of body, if any... */
1220 for (;;) {
1221 int linelen = get_one_line(msg, len);
1222 int ll = linelen;
1223 if (!linelen)
1224 break;
1225 if (!is_empty_line(msg, &ll))
1226 break;
1227 msg += linelen;
1228 len -= linelen;
1229 }
1230 /* These formats treat the title line specially. */
1232 if (fmt == CMIT_FMT_ONELINE
1233 || fmt == CMIT_FMT_EMAIL)
1234 pp_title_line(fmt, &msg, &len, &offset,
1235 buf_p, space_p, indent,
1236 subject, after_subject, encoding,
1237 plain_non_ascii);
1238 beginning_of_body = offset;
1240 if (fmt != CMIT_FMT_ONELINE)
1241 pp_remainder(fmt, &msg, &len, &offset,
1242 buf_p, space_p, indent);
1243 while (offset && isspace((*buf_p)[offset-1]))
1245 offset--;
1246 ALLOC_GROW(*buf_p, offset + 20, *space_p);
1248 buf = *buf_p;
1249 /* Make sure there is an EOLN for the non-oneline case */
1251 if (fmt != CMIT_FMT_ONELINE)
1252 buf[offset++] = '\n';
1253 /*
1255 * The caller may append additional body text in e-mail
1256 * format. Make sure we did not strip the blank line
1257 * between the header and the body.
1258 */
1259 if (fmt == CMIT_FMT_EMAIL && offset <= beginning_of_body)
1260 buf[offset++] = '\n';
1261 buf[offset] = '\0';
1262 free(reencoded);
1263 return offset;
1264}
1265struct commit *pop_commit(struct commit_list **stack)
1267{
1268 struct commit_list *top = *stack;
1269 struct commit *item = top ? top->item : NULL;
1270 if (top) {
1272 *stack = top->next;
1273 free(top);
1274 }
1275 return item;
1276}
1277void topo_sort_default_setter(struct commit *c, void *data)
1279{
1280 c->util = data;
1281}
1282void *topo_sort_default_getter(struct commit *c)
1284{
1285 return c->util;
1286}
1287/*
1289 * Performs an in-place topological sort on the list supplied.
1290 */
1291void sort_in_topological_order(struct commit_list ** list, int lifo)
1292{
1293 sort_in_topological_order_fn(list, lifo, topo_sort_default_setter,
1294 topo_sort_default_getter);
1295}
1296void sort_in_topological_order_fn(struct commit_list ** list, int lifo,
1298 topo_sort_set_fn_t setter,
1299 topo_sort_get_fn_t getter)
1300{
1301 struct commit_list * next = *list;
1302 struct commit_list * work = NULL, **insert;
1303 struct commit_list ** pptr = list;
1304 struct sort_node * nodes;
1305 struct sort_node * next_nodes;
1306 int count = 0;
1307 /* determine the size of the list */
1309 while (next) {
1310 next = next->next;
1311 count++;
1312 }
1313 if (!count)
1315 return;
1316 /* allocate an array to help sort the list */
1317 nodes = xcalloc(count, sizeof(*nodes));
1318 /* link the list to the array */
1319 next_nodes = nodes;
1320 next=*list;
1321 while (next) {
1322 next_nodes->list_item = next;
1323 setter(next->item, next_nodes);
1324 next_nodes++;
1325 next = next->next;
1326 }
1327 /* update the indegree */
1328 next=*list;
1329 while (next) {
1330 struct commit_list * parents = next->item->parents;
1331 while (parents) {
1332 struct commit * parent=parents->item;
1333 struct sort_node * pn = (struct sort_node *) getter(parent);
1334 if (pn)
1336 pn->indegree++;
1337 parents=parents->next;
1338 }
1339 next=next->next;
1340 }
1341 /*
1342 * find the tips
1343 *
1344 * tips are nodes not reachable from any other node in the list
1345 *
1346 * the tips serve as a starting set for the work queue.
1347 */
1348 next=*list;
1349 insert = &work;
1350 while (next) {
1351 struct sort_node * node = (struct sort_node *) getter(next->item);
1352 if (node->indegree == 0) {
1354 insert = &commit_list_insert(next->item, insert)->next;
1355 }
1356 next=next->next;
1357 }
1358 /* process the list in topological order */
1360 if (!lifo)
1361 sort_by_date(&work);
1362 while (work) {
1363 struct commit * work_item = pop_commit(&work);
1364 struct sort_node * work_node = (struct sort_node *) getter(work_item);
1365 struct commit_list * parents = work_item->parents;
1366 while (parents) {
1368 struct commit * parent=parents->item;
1369 struct sort_node * pn = (struct sort_node *) getter(parent);
1370 if (pn) {
1372 /*
1373 * parents are only enqueued for emission
1374 * when all their children have been emitted thereby
1375 * guaranteeing topological order.
1376 */
1377 pn->indegree--;
1378 if (!pn->indegree) {
1379 if (!lifo)
1380 insert_by_date(parent, &work);
1381 else
1382 commit_list_insert(parent, &work);
1383 }
1384 }
1385 parents=parents->next;
1386 }
1387 /*
1388 * work_item is a commit all of whose children
1389 * have already been emitted. we can emit it now.
1390 */
1391 *pptr = work_node->list_item;
1392 pptr = &(*pptr)->next;
1393 *pptr = NULL;
1394 setter(work_item, NULL);
1395 }
1396 free(nodes);
1397}
1398/* merge-base stuff */
1400/* bits #0..15 in revision.h */
1402#define PARENT1 (1u<<16)
1403#define PARENT2 (1u<<17)
1404#define STALE (1u<<18)
1405#define RESULT (1u<<19)
1406static const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT);
1408static struct commit *interesting(struct commit_list *list)
1410{
1411 while (list) {
1412 struct commit *commit = list->item;
1413 list = list->next;
1414 if (commit->object.flags & STALE)
1415 continue;
1416 return commit;
1417 }
1418 return NULL;
1419}
1420static struct commit_list *merge_bases(struct commit *one, struct commit *two)
1422{
1423 struct commit_list *list = NULL;
1424 struct commit_list *result = NULL;
1425 if (one == two)
1427 /* We do not mark this even with RESULT so we do not
1428 * have to clean it up.
1429 */
1430 return commit_list_insert(one, &result);
1431 parse_commit(one);
1433 parse_commit(two);
1434 one->object.flags |= PARENT1;
1436 two->object.flags |= PARENT2;
1437 insert_by_date(one, &list);
1438 insert_by_date(two, &list);
1439 while (interesting(list)) {
1441 struct commit *commit;
1442 struct commit_list *parents;
1443 struct commit_list *n;
1444 int flags;
1445 commit = list->item;
1447 n = list->next;
1448 free(list);
1449 list = n;
1450 flags = commit->object.flags & (PARENT1 | PARENT2 | STALE);
1452 if (flags == (PARENT1 | PARENT2)) {
1453 if (!(commit->object.flags & RESULT)) {
1454 commit->object.flags |= RESULT;
1455 insert_by_date(commit, &result);
1456 }
1457 /* Mark parents of a found merge stale */
1458 flags |= STALE;
1459 }
1460 parents = commit->parents;
1461 while (parents) {
1462 struct commit *p = parents->item;
1463 parents = parents->next;
1464 if ((p->object.flags & flags) == flags)
1465 continue;
1466 parse_commit(p);
1467 p->object.flags |= flags;
1468 insert_by_date(p, &list);
1469 }
1470 }
1471 /* Clean up the result to remove stale ones */
1473 free_commit_list(list);
1474 list = result; result = NULL;
1475 while (list) {
1476 struct commit_list *n = list->next;
1477 if (!(list->item->object.flags & STALE))
1478 insert_by_date(list->item, &result);
1479 free(list);
1480 list = n;
1481 }
1482 return result;
1483}
1484struct commit_list *get_merge_bases(struct commit *one,
1486 struct commit *two,
1487 int cleanup)
1488{
1489 struct commit_list *list;
1490 struct commit **rslt;
1491 struct commit_list *result;
1492 int cnt, i, j;
1493 result = merge_bases(one, two);
1495 if (one == two)
1496 return result;
1497 if (!result || !result->next) {
1498 if (cleanup) {
1499 clear_commit_marks(one, all_flags);
1500 clear_commit_marks(two, all_flags);
1501 }
1502 return result;
1503 }
1504 /* There are more than one */
1506 cnt = 0;
1507 list = result;
1508 while (list) {
1509 list = list->next;
1510 cnt++;
1511 }
1512 rslt = xcalloc(cnt, sizeof(*rslt));
1513 for (list = result, i = 0; list; list = list->next)
1514 rslt[i++] = list->item;
1515 free_commit_list(result);
1516 clear_commit_marks(one, all_flags);
1518 clear_commit_marks(two, all_flags);
1519 for (i = 0; i < cnt - 1; i++) {
1520 for (j = i+1; j < cnt; j++) {
1521 if (!rslt[i] || !rslt[j])
1522 continue;
1523 result = merge_bases(rslt[i], rslt[j]);
1524 clear_commit_marks(rslt[i], all_flags);
1525 clear_commit_marks(rslt[j], all_flags);
1526 for (list = result; list; list = list->next) {
1527 if (rslt[i] == list->item)
1528 rslt[i] = NULL;
1529 if (rslt[j] == list->item)
1530 rslt[j] = NULL;
1531 }
1532 }
1533 }
1534 /* Surviving ones in rslt[] are the independent results */
1536 result = NULL;
1537 for (i = 0; i < cnt; i++) {
1538 if (rslt[i])
1539 insert_by_date(rslt[i], &result);
1540 }
1541 free(rslt);
1542 return result;
1543}
1544int in_merge_bases(struct commit *commit, struct commit **reference, int num)
1546{
1547 struct commit_list *bases, *b;
1548 int ret = 0;
1549 if (num == 1)
1551 bases = get_merge_bases(commit, *reference, 1);
1552 else
1553 die("not yet");
1554 for (b = bases; b; b = b->next) {
1555 if (!hashcmp(commit->object.sha1, b->item->object.sha1)) {
1556 ret = 1;
1557 break;
1558 }
1559 }
1560 free_commit_list(bases);
1562 return ret;
1563}