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Commit | Line | Data |
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a2ad79ce | 1 | #include "cache.h" |
b2141fc1 | 2 | #include "config.h" |
a2ad79ce CC |
3 | #include "commit.h" |
4 | #include "diff.h" | |
5 | #include "revision.h" | |
1bf072e3 CC |
6 | #include "refs.h" |
7 | #include "list-objects.h" | |
3b437b0d | 8 | #include "quote.h" |
4eb5b646 | 9 | #include "sha1-lookup.h" |
ef24c7ca | 10 | #include "run-command.h" |
e22278c0 | 11 | #include "log-tree.h" |
a2ad79ce | 12 | #include "bisect.h" |
902bb364 | 13 | #include "sha1-array.h" |
8a534b61 | 14 | #include "argv-array.h" |
6212b1aa | 15 | |
910650d2 | 16 | static struct oid_array good_revs; |
17 | static struct oid_array skipped_revs; | |
1bf072e3 | 18 | |
3c5ff995 | 19 | static struct object_id *current_bad_oid; |
ef24c7ca | 20 | |
ef24c7ca CC |
21 | static const char *argv_checkout[] = {"checkout", "-q", NULL, "--", NULL}; |
22 | static const char *argv_show_branch[] = {"show-branch", NULL, NULL}; | |
23 | ||
43f9d9f3 AD |
24 | static const char *term_bad; |
25 | static const char *term_good; | |
26 | ||
208acbfb | 27 | /* Remember to update object flag allocation in object.h */ |
a2ad79ce CC |
28 | #define COUNTED (1u<<16) |
29 | ||
30 | /* | |
31 | * This is a truly stupid algorithm, but it's only | |
32 | * used for bisection, and we just don't care enough. | |
33 | * | |
34 | * We care just barely enough to avoid recursing for | |
35 | * non-merge entries. | |
36 | */ | |
37 | static int count_distance(struct commit_list *entry) | |
38 | { | |
39 | int nr = 0; | |
40 | ||
41 | while (entry) { | |
42 | struct commit *commit = entry->item; | |
43 | struct commit_list *p; | |
44 | ||
45 | if (commit->object.flags & (UNINTERESTING | COUNTED)) | |
46 | break; | |
47 | if (!(commit->object.flags & TREESAME)) | |
48 | nr++; | |
49 | commit->object.flags |= COUNTED; | |
50 | p = commit->parents; | |
51 | entry = p; | |
52 | if (p) { | |
53 | p = p->next; | |
54 | while (p) { | |
55 | nr += count_distance(p); | |
56 | p = p->next; | |
57 | } | |
58 | } | |
59 | } | |
60 | ||
61 | return nr; | |
62 | } | |
63 | ||
64 | static void clear_distance(struct commit_list *list) | |
65 | { | |
66 | while (list) { | |
67 | struct commit *commit = list->item; | |
68 | commit->object.flags &= ~COUNTED; | |
69 | list = list->next; | |
70 | } | |
71 | } | |
72 | ||
73 | #define DEBUG_BISECT 0 | |
74 | ||
75 | static inline int weight(struct commit_list *elem) | |
76 | { | |
77 | return *((int*)(elem->item->util)); | |
78 | } | |
79 | ||
80 | static inline void weight_set(struct commit_list *elem, int weight) | |
81 | { | |
82 | *((int*)(elem->item->util)) = weight; | |
83 | } | |
84 | ||
85 | static int count_interesting_parents(struct commit *commit) | |
86 | { | |
87 | struct commit_list *p; | |
88 | int count; | |
89 | ||
90 | for (count = 0, p = commit->parents; p; p = p->next) { | |
91 | if (p->item->object.flags & UNINTERESTING) | |
92 | continue; | |
93 | count++; | |
94 | } | |
95 | return count; | |
96 | } | |
97 | ||
98 | static inline int halfway(struct commit_list *p, int nr) | |
99 | { | |
100 | /* | |
101 | * Don't short-cut something we are not going to return! | |
102 | */ | |
103 | if (p->item->object.flags & TREESAME) | |
104 | return 0; | |
105 | if (DEBUG_BISECT) | |
106 | return 0; | |
107 | /* | |
108 | * 2 and 3 are halfway of 5. | |
109 | * 3 is halfway of 6 but 2 and 4 are not. | |
110 | */ | |
111 | switch (2 * weight(p) - nr) { | |
112 | case -1: case 0: case 1: | |
113 | return 1; | |
114 | default: | |
115 | return 0; | |
116 | } | |
117 | } | |
118 | ||
119 | #if !DEBUG_BISECT | |
120 | #define show_list(a,b,c,d) do { ; } while (0) | |
121 | #else | |
122 | static void show_list(const char *debug, int counted, int nr, | |
123 | struct commit_list *list) | |
124 | { | |
125 | struct commit_list *p; | |
126 | ||
127 | fprintf(stderr, "%s (%d/%d)\n", debug, counted, nr); | |
128 | ||
129 | for (p = list; p; p = p->next) { | |
130 | struct commit_list *pp; | |
131 | struct commit *commit = p->item; | |
132 | unsigned flags = commit->object.flags; | |
133 | enum object_type type; | |
134 | unsigned long size; | |
b4f5aca4 | 135 | char *buf = read_object_file(&commit->object.oid, &type, |
136 | &size); | |
56ff3794 CC |
137 | const char *subject_start; |
138 | int subject_len; | |
a2ad79ce CC |
139 | |
140 | fprintf(stderr, "%c%c%c ", | |
141 | (flags & TREESAME) ? ' ' : 'T', | |
142 | (flags & UNINTERESTING) ? 'U' : ' ', | |
143 | (flags & COUNTED) ? 'C' : ' '); | |
144 | if (commit->util) | |
145 | fprintf(stderr, "%3d", weight(p)); | |
146 | else | |
147 | fprintf(stderr, "---"); | |
14ced556 | 148 | fprintf(stderr, " %.*s", 8, oid_to_hex(&commit->object.oid)); |
a2ad79ce CC |
149 | for (pp = commit->parents; pp; pp = pp->next) |
150 | fprintf(stderr, " %.*s", 8, | |
14ced556 | 151 | oid_to_hex(&pp->item->object.oid)); |
a2ad79ce | 152 | |
56ff3794 CC |
153 | subject_len = find_commit_subject(buf, &subject_start); |
154 | if (subject_len) | |
155 | fprintf(stderr, " %.*s", subject_len, subject_start); | |
a2ad79ce CC |
156 | fprintf(stderr, "\n"); |
157 | } | |
158 | } | |
159 | #endif /* DEBUG_BISECT */ | |
160 | ||
161 | static struct commit_list *best_bisection(struct commit_list *list, int nr) | |
162 | { | |
163 | struct commit_list *p, *best; | |
164 | int best_distance = -1; | |
165 | ||
166 | best = list; | |
167 | for (p = list; p; p = p->next) { | |
168 | int distance; | |
169 | unsigned flags = p->item->object.flags; | |
170 | ||
171 | if (flags & TREESAME) | |
172 | continue; | |
173 | distance = weight(p); | |
174 | if (nr - distance < distance) | |
175 | distance = nr - distance; | |
176 | if (distance > best_distance) { | |
177 | best = p; | |
178 | best_distance = distance; | |
179 | } | |
180 | } | |
181 | ||
182 | return best; | |
183 | } | |
184 | ||
185 | struct commit_dist { | |
186 | struct commit *commit; | |
187 | int distance; | |
188 | }; | |
189 | ||
190 | static int compare_commit_dist(const void *a_, const void *b_) | |
191 | { | |
192 | struct commit_dist *a, *b; | |
193 | ||
194 | a = (struct commit_dist *)a_; | |
195 | b = (struct commit_dist *)b_; | |
196 | if (a->distance != b->distance) | |
197 | return b->distance - a->distance; /* desc sort */ | |
f2fd0760 | 198 | return oidcmp(&a->commit->object.oid, &b->commit->object.oid); |
a2ad79ce CC |
199 | } |
200 | ||
201 | static struct commit_list *best_bisection_sorted(struct commit_list *list, int nr) | |
202 | { | |
203 | struct commit_list *p; | |
204 | struct commit_dist *array = xcalloc(nr, sizeof(*array)); | |
5b1ef2ce | 205 | struct strbuf buf = STRBUF_INIT; |
a2ad79ce CC |
206 | int cnt, i; |
207 | ||
208 | for (p = list, cnt = 0; p; p = p->next) { | |
209 | int distance; | |
210 | unsigned flags = p->item->object.flags; | |
211 | ||
212 | if (flags & TREESAME) | |
213 | continue; | |
214 | distance = weight(p); | |
215 | if (nr - distance < distance) | |
216 | distance = nr - distance; | |
217 | array[cnt].commit = p->item; | |
218 | array[cnt].distance = distance; | |
219 | cnt++; | |
220 | } | |
9ed0d8d6 | 221 | QSORT(array, cnt, compare_commit_dist); |
a2ad79ce | 222 | for (p = list, i = 0; i < cnt; i++) { |
a2ad79ce CC |
223 | struct object *obj = &(array[i].commit->object); |
224 | ||
5b1ef2ce JK |
225 | strbuf_reset(&buf); |
226 | strbuf_addf(&buf, "dist=%d", array[i].distance); | |
227 | add_name_decoration(DECORATION_NONE, buf.buf, obj); | |
662174d2 | 228 | |
a2ad79ce | 229 | p->item = array[i].commit; |
7c117184 MÅ |
230 | if (i < cnt - 1) |
231 | p = p->next; | |
a2ad79ce | 232 | } |
2e9fdc79 ÆAB |
233 | if (p) { |
234 | free_commit_list(p->next); | |
235 | p->next = NULL; | |
236 | } | |
5b1ef2ce | 237 | strbuf_release(&buf); |
a2ad79ce CC |
238 | free(array); |
239 | return list; | |
240 | } | |
241 | ||
242 | /* | |
243 | * zero or positive weight is the number of interesting commits it can | |
244 | * reach, including itself. Especially, weight = 0 means it does not | |
245 | * reach any tree-changing commits (e.g. just above uninteresting one | |
246 | * but traversal is with pathspec). | |
247 | * | |
248 | * weight = -1 means it has one parent and its distance is yet to | |
249 | * be computed. | |
250 | * | |
251 | * weight = -2 means it has more than one parent and its distance is | |
252 | * unknown. After running count_distance() first, they will get zero | |
253 | * or positive distance. | |
254 | */ | |
255 | static struct commit_list *do_find_bisection(struct commit_list *list, | |
256 | int nr, int *weights, | |
257 | int find_all) | |
258 | { | |
259 | int n, counted; | |
260 | struct commit_list *p; | |
261 | ||
262 | counted = 0; | |
263 | ||
264 | for (n = 0, p = list; p; p = p->next) { | |
265 | struct commit *commit = p->item; | |
266 | unsigned flags = commit->object.flags; | |
267 | ||
268 | p->item->util = &weights[n++]; | |
269 | switch (count_interesting_parents(commit)) { | |
270 | case 0: | |
271 | if (!(flags & TREESAME)) { | |
272 | weight_set(p, 1); | |
273 | counted++; | |
274 | show_list("bisection 2 count one", | |
275 | counted, nr, list); | |
276 | } | |
277 | /* | |
278 | * otherwise, it is known not to reach any | |
279 | * tree-changing commit and gets weight 0. | |
280 | */ | |
281 | break; | |
282 | case 1: | |
283 | weight_set(p, -1); | |
284 | break; | |
285 | default: | |
286 | weight_set(p, -2); | |
287 | break; | |
288 | } | |
289 | } | |
290 | ||
291 | show_list("bisection 2 initialize", counted, nr, list); | |
292 | ||
293 | /* | |
294 | * If you have only one parent in the resulting set | |
295 | * then you can reach one commit more than that parent | |
296 | * can reach. So we do not have to run the expensive | |
297 | * count_distance() for single strand of pearls. | |
298 | * | |
299 | * However, if you have more than one parents, you cannot | |
300 | * just add their distance and one for yourself, since | |
301 | * they usually reach the same ancestor and you would | |
302 | * end up counting them twice that way. | |
303 | * | |
304 | * So we will first count distance of merges the usual | |
305 | * way, and then fill the blanks using cheaper algorithm. | |
306 | */ | |
307 | for (p = list; p; p = p->next) { | |
308 | if (p->item->object.flags & UNINTERESTING) | |
309 | continue; | |
310 | if (weight(p) != -2) | |
311 | continue; | |
312 | weight_set(p, count_distance(p)); | |
313 | clear_distance(list); | |
314 | ||
315 | /* Does it happen to be at exactly half-way? */ | |
316 | if (!find_all && halfway(p, nr)) | |
317 | return p; | |
318 | counted++; | |
319 | } | |
320 | ||
321 | show_list("bisection 2 count_distance", counted, nr, list); | |
322 | ||
323 | while (counted < nr) { | |
324 | for (p = list; p; p = p->next) { | |
325 | struct commit_list *q; | |
326 | unsigned flags = p->item->object.flags; | |
327 | ||
328 | if (0 <= weight(p)) | |
329 | continue; | |
330 | for (q = p->item->parents; q; q = q->next) { | |
331 | if (q->item->object.flags & UNINTERESTING) | |
332 | continue; | |
333 | if (0 <= weight(q)) | |
334 | break; | |
335 | } | |
336 | if (!q) | |
337 | continue; | |
338 | ||
339 | /* | |
340 | * weight for p is unknown but q is known. | |
341 | * add one for p itself if p is to be counted, | |
342 | * otherwise inherit it from q directly. | |
343 | */ | |
344 | if (!(flags & TREESAME)) { | |
345 | weight_set(p, weight(q)+1); | |
346 | counted++; | |
347 | show_list("bisection 2 count one", | |
348 | counted, nr, list); | |
349 | } | |
350 | else | |
351 | weight_set(p, weight(q)); | |
352 | ||
353 | /* Does it happen to be at exactly half-way? */ | |
354 | if (!find_all && halfway(p, nr)) | |
355 | return p; | |
356 | } | |
357 | } | |
358 | ||
359 | show_list("bisection 2 counted all", counted, nr, list); | |
360 | ||
361 | if (!find_all) | |
362 | return best_bisection(list, nr); | |
363 | else | |
364 | return best_bisection_sorted(list, nr); | |
365 | } | |
366 | ||
24d707f6 MÅ |
367 | void find_bisection(struct commit_list **commit_list, int *reaches, |
368 | int *all, int find_all) | |
a2ad79ce CC |
369 | { |
370 | int nr, on_list; | |
24d707f6 | 371 | struct commit_list *list, *p, *best, *next, *last; |
a2ad79ce CC |
372 | int *weights; |
373 | ||
24d707f6 | 374 | show_list("bisection 2 entry", 0, 0, *commit_list); |
a2ad79ce CC |
375 | |
376 | /* | |
377 | * Count the number of total and tree-changing items on the | |
378 | * list, while reversing the list. | |
379 | */ | |
24d707f6 | 380 | for (nr = on_list = 0, last = NULL, p = *commit_list; |
a2ad79ce CC |
381 | p; |
382 | p = next) { | |
383 | unsigned flags = p->item->object.flags; | |
384 | ||
385 | next = p->next; | |
fc5c40bb MÅ |
386 | if (flags & UNINTERESTING) { |
387 | free(p); | |
a2ad79ce | 388 | continue; |
fc5c40bb | 389 | } |
a2ad79ce CC |
390 | p->next = last; |
391 | last = p; | |
392 | if (!(flags & TREESAME)) | |
393 | nr++; | |
394 | on_list++; | |
395 | } | |
396 | list = last; | |
397 | show_list("bisection 2 sorted", 0, nr, list); | |
398 | ||
399 | *all = nr; | |
400 | weights = xcalloc(on_list, sizeof(*weights)); | |
401 | ||
402 | /* Do the real work of finding bisection commit. */ | |
403 | best = do_find_bisection(list, nr, weights, find_all); | |
404 | if (best) { | |
f4e45cb3 MÅ |
405 | if (!find_all) { |
406 | list->item = best->item; | |
407 | free_commit_list(list->next); | |
408 | best = list; | |
a2ad79ce | 409 | best->next = NULL; |
f4e45cb3 | 410 | } |
a2ad79ce CC |
411 | *reaches = weight(best); |
412 | } | |
413 | free(weights); | |
24d707f6 | 414 | *commit_list = best; |
a2ad79ce CC |
415 | } |
416 | ||
eed25148 | 417 | static int register_ref(const char *refname, const struct object_id *oid, |
1bf072e3 CC |
418 | int flags, void *cb_data) |
419 | { | |
43f9d9f3 AD |
420 | struct strbuf good_prefix = STRBUF_INIT; |
421 | strbuf_addstr(&good_prefix, term_good); | |
422 | strbuf_addstr(&good_prefix, "-"); | |
423 | ||
424 | if (!strcmp(refname, term_bad)) { | |
3c5ff995 | 425 | current_bad_oid = xmalloc(sizeof(*current_bad_oid)); |
eed25148 | 426 | oidcpy(current_bad_oid, oid); |
43f9d9f3 | 427 | } else if (starts_with(refname, good_prefix.buf)) { |
910650d2 | 428 | oid_array_append(&good_revs, oid); |
59556548 | 429 | } else if (starts_with(refname, "skip-")) { |
910650d2 | 430 | oid_array_append(&skipped_revs, oid); |
1bf072e3 CC |
431 | } |
432 | ||
43f9d9f3 AD |
433 | strbuf_release(&good_prefix); |
434 | ||
1bf072e3 CC |
435 | return 0; |
436 | } | |
437 | ||
438 | static int read_bisect_refs(void) | |
439 | { | |
eed25148 | 440 | return for_each_ref_in("refs/bisect/", register_ref, NULL); |
1bf072e3 CC |
441 | } |
442 | ||
f932729c JK |
443 | static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES") |
444 | static GIT_PATH_FUNC(git_path_bisect_expected_rev, "BISECT_EXPECTED_REV") | |
fb71a329 PB |
445 | static GIT_PATH_FUNC(git_path_bisect_ancestors_ok, "BISECT_ANCESTORS_OK") |
446 | static GIT_PATH_FUNC(git_path_bisect_run, "BISECT_RUN") | |
447 | static GIT_PATH_FUNC(git_path_bisect_start, "BISECT_START") | |
448 | static GIT_PATH_FUNC(git_path_bisect_log, "BISECT_LOG") | |
f5d284f6 | 449 | static GIT_PATH_FUNC(git_path_bisect_terms, "BISECT_TERMS") |
fb71a329 | 450 | static GIT_PATH_FUNC(git_path_head_name, "head-name") |
f932729c | 451 | |
2af202be | 452 | static void read_bisect_paths(struct argv_array *array) |
3b437b0d CC |
453 | { |
454 | struct strbuf str = STRBUF_INIT; | |
f932729c | 455 | const char *filename = git_path_bisect_names(); |
23a9e071 | 456 | FILE *fp = xfopen(filename, "r"); |
3b437b0d | 457 | |
8f309aeb | 458 | while (strbuf_getline_lf(&str, fp) != EOF) { |
3b437b0d | 459 | strbuf_trim(&str); |
8a534b61 | 460 | if (sq_dequote_to_argv_array(str.buf, array)) |
14dc4899 | 461 | die(_("Badly quoted content in file '%s': %s"), |
8a534b61 | 462 | filename, str.buf); |
3b437b0d CC |
463 | } |
464 | ||
465 | strbuf_release(&str); | |
466 | fclose(fp); | |
467 | } | |
468 | ||
910650d2 | 469 | static char *join_sha1_array_hex(struct oid_array *array, char delim) |
c0537662 CC |
470 | { |
471 | struct strbuf joined_hexs = STRBUF_INIT; | |
472 | int i; | |
473 | ||
902bb364 | 474 | for (i = 0; i < array->nr; i++) { |
ee3051bd | 475 | strbuf_addstr(&joined_hexs, oid_to_hex(array->oid + i)); |
902bb364 | 476 | if (i + 1 < array->nr) |
c0537662 CC |
477 | strbuf_addch(&joined_hexs, delim); |
478 | } | |
479 | ||
480 | return strbuf_detach(&joined_hexs, NULL); | |
481 | } | |
482 | ||
9af3589e CC |
483 | /* |
484 | * In this function, passing a not NULL skipped_first is very special. | |
485 | * It means that we want to know if the first commit in the list is | |
486 | * skipped because we will want to test a commit away from it if it is | |
487 | * indeed skipped. | |
488 | * So if the first commit is skipped, we cannot take the shortcut to | |
489 | * just "return list" when we find the first non skipped commit, we | |
490 | * have to return a fully filtered list. | |
491 | * | |
492 | * We use (*skipped_first == -1) to mean "it has been found that the | |
493 | * first commit is not skipped". In this case *skipped_first is set back | |
494 | * to 0 just before the function returns. | |
495 | */ | |
95188648 CC |
496 | struct commit_list *filter_skipped(struct commit_list *list, |
497 | struct commit_list **tried, | |
9af3589e CC |
498 | int show_all, |
499 | int *count, | |
500 | int *skipped_first) | |
95188648 CC |
501 | { |
502 | struct commit_list *filtered = NULL, **f = &filtered; | |
503 | ||
504 | *tried = NULL; | |
505 | ||
9af3589e CC |
506 | if (skipped_first) |
507 | *skipped_first = 0; | |
508 | if (count) | |
509 | *count = 0; | |
510 | ||
902bb364 | 511 | if (!skipped_revs.nr) |
95188648 CC |
512 | return list; |
513 | ||
95188648 CC |
514 | while (list) { |
515 | struct commit_list *next = list->next; | |
516 | list->next = NULL; | |
910650d2 | 517 | if (0 <= oid_array_lookup(&skipped_revs, &list->item->object.oid)) { |
9af3589e CC |
518 | if (skipped_first && !*skipped_first) |
519 | *skipped_first = 1; | |
95188648 CC |
520 | /* Move current to tried list */ |
521 | *tried = list; | |
522 | tried = &list->next; | |
523 | } else { | |
9af3589e CC |
524 | if (!show_all) { |
525 | if (!skipped_first || !*skipped_first) | |
526 | return list; | |
527 | } else if (skipped_first && !*skipped_first) { | |
528 | /* This means we know it's not skipped */ | |
529 | *skipped_first = -1; | |
530 | } | |
95188648 CC |
531 | /* Move current to filtered list */ |
532 | *f = list; | |
533 | f = &list->next; | |
9af3589e CC |
534 | if (count) |
535 | (*count)++; | |
95188648 CC |
536 | } |
537 | list = next; | |
538 | } | |
539 | ||
9af3589e CC |
540 | if (skipped_first && *skipped_first == -1) |
541 | *skipped_first = 0; | |
542 | ||
95188648 CC |
543 | return filtered; |
544 | } | |
1bf072e3 | 545 | |
ebc9529f CC |
546 | #define PRN_MODULO 32768 |
547 | ||
548 | /* | |
549 | * This is a pseudo random number generator based on "man 3 rand". | |
550 | * It is not used properly because the seed is the argument and it | |
551 | * is increased by one between each call, but that should not matter | |
552 | * for this application. | |
553 | */ | |
7b96d888 | 554 | static unsigned get_prn(unsigned count) { |
ebc9529f | 555 | count = count * 1103515245 + 12345; |
7b96d888 | 556 | return (count/65536) % PRN_MODULO; |
ebc9529f CC |
557 | } |
558 | ||
559 | /* | |
560 | * Custom integer square root from | |
5e68729f | 561 | * https://en.wikipedia.org/wiki/Integer_square_root |
ebc9529f CC |
562 | */ |
563 | static int sqrti(int val) | |
564 | { | |
565 | float d, x = val; | |
566 | ||
567 | if (val == 0) | |
568 | return 0; | |
569 | ||
570 | do { | |
571 | float y = (x + (float)val / x) / 2; | |
572 | d = (y > x) ? y - x : x - y; | |
573 | x = y; | |
574 | } while (d >= 0.5); | |
575 | ||
576 | return (int)x; | |
577 | } | |
578 | ||
579 | static struct commit_list *skip_away(struct commit_list *list, int count) | |
62d0b0da | 580 | { |
62d0b0da | 581 | struct commit_list *cur, *previous; |
ebc9529f CC |
582 | int prn, index, i; |
583 | ||
584 | prn = get_prn(count); | |
585 | index = (count * prn / PRN_MODULO) * sqrti(prn) / sqrti(PRN_MODULO); | |
62d0b0da CC |
586 | |
587 | cur = list; | |
588 | previous = NULL; | |
62d0b0da CC |
589 | |
590 | for (i = 0; cur; cur = cur->next, i++) { | |
591 | if (i == index) { | |
f2fd0760 | 592 | if (oidcmp(&cur->item->object.oid, current_bad_oid)) |
62d0b0da CC |
593 | return cur; |
594 | if (previous) | |
595 | return previous; | |
596 | return list; | |
597 | } | |
598 | previous = cur; | |
599 | } | |
600 | ||
601 | return list; | |
602 | } | |
603 | ||
604 | static struct commit_list *managed_skipped(struct commit_list *list, | |
605 | struct commit_list **tried) | |
606 | { | |
607 | int count, skipped_first; | |
62d0b0da CC |
608 | |
609 | *tried = NULL; | |
610 | ||
902bb364 | 611 | if (!skipped_revs.nr) |
62d0b0da CC |
612 | return list; |
613 | ||
614 | list = filter_skipped(list, tried, 0, &count, &skipped_first); | |
615 | ||
616 | if (!skipped_first) | |
617 | return list; | |
618 | ||
ebc9529f | 619 | return skip_away(list, count); |
62d0b0da CC |
620 | } |
621 | ||
a22347c6 CC |
622 | static void bisect_rev_setup(struct rev_info *revs, const char *prefix, |
623 | const char *bad_format, const char *good_format, | |
624 | int read_paths) | |
1bf072e3 | 625 | { |
8a534b61 | 626 | struct argv_array rev_argv = ARGV_ARRAY_INIT; |
fad2d31d CC |
627 | int i; |
628 | ||
3b437b0d CC |
629 | init_revisions(revs, prefix); |
630 | revs->abbrev = 0; | |
631 | revs->commit_format = CMIT_FMT_UNSPECIFIED; | |
1bf072e3 | 632 | |
1c953a1f | 633 | /* rev_argv.argv[0] will be ignored by setup_revisions */ |
8a534b61 | 634 | argv_array_push(&rev_argv, "bisect_rev_setup"); |
3c5ff995 | 635 | argv_array_pushf(&rev_argv, bad_format, oid_to_hex(current_bad_oid)); |
902bb364 | 636 | for (i = 0; i < good_revs.nr; i++) |
8a534b61 | 637 | argv_array_pushf(&rev_argv, good_format, |
ee3051bd | 638 | oid_to_hex(good_revs.oid + i)); |
8a534b61 | 639 | argv_array_push(&rev_argv, "--"); |
a22347c6 CC |
640 | if (read_paths) |
641 | read_bisect_paths(&rev_argv); | |
3b437b0d | 642 | |
8a534b61 JK |
643 | setup_revisions(rev_argv.argc, rev_argv.argv, revs, NULL); |
644 | /* XXX leak rev_argv, as "revs" may still be pointing to it */ | |
3b437b0d CC |
645 | } |
646 | ||
a22347c6 | 647 | static void bisect_common(struct rev_info *revs) |
2ace9727 | 648 | { |
2ace9727 CC |
649 | if (prepare_revision_walk(revs)) |
650 | die("revision walk setup failed"); | |
651 | if (revs->tree_objects) | |
e76a5fb4 | 652 | mark_edges_uninteresting(revs, NULL); |
2ace9727 CC |
653 | } |
654 | ||
ef24c7ca | 655 | static void exit_if_skipped_commits(struct commit_list *tried, |
3c5ff995 | 656 | const struct object_id *bad) |
ef24c7ca CC |
657 | { |
658 | if (!tried) | |
659 | return; | |
660 | ||
661 | printf("There are only 'skip'ped commits left to test.\n" | |
43f9d9f3 | 662 | "The first %s commit could be any of:\n", term_bad); |
54307ea7 JH |
663 | |
664 | for ( ; tried; tried = tried->next) | |
665 | printf("%s\n", oid_to_hex(&tried->item->object.oid)); | |
666 | ||
ef24c7ca | 667 | if (bad) |
3c5ff995 | 668 | printf("%s\n", oid_to_hex(bad)); |
14dc4899 | 669 | printf(_("We cannot bisect more!\n")); |
ef24c7ca CC |
670 | exit(2); |
671 | } | |
672 | ||
3c5ff995 | 673 | static int is_expected_rev(const struct object_id *oid) |
c0537662 | 674 | { |
f932729c | 675 | const char *filename = git_path_bisect_expected_rev(); |
c0537662 CC |
676 | struct stat st; |
677 | struct strbuf str = STRBUF_INIT; | |
678 | FILE *fp; | |
679 | int res = 0; | |
680 | ||
681 | if (stat(filename, &st) || !S_ISREG(st.st_mode)) | |
682 | return 0; | |
683 | ||
e9d983f1 | 684 | fp = fopen_or_warn(filename, "r"); |
c0537662 CC |
685 | if (!fp) |
686 | return 0; | |
687 | ||
8f309aeb | 688 | if (strbuf_getline_lf(&str, fp) != EOF) |
3c5ff995 | 689 | res = !strcmp(str.buf, oid_to_hex(oid)); |
c0537662 CC |
690 | |
691 | strbuf_release(&str); | |
692 | fclose(fp); | |
693 | ||
694 | return res; | |
695 | } | |
696 | ||
4be0deec | 697 | static int bisect_checkout(const struct object_id *bisect_rev, int no_checkout) |
ef24c7ca | 698 | { |
dc01505f | 699 | char bisect_rev_hex[GIT_MAX_HEXSZ + 1]; |
ef24c7ca | 700 | |
4be0deec | 701 | memcpy(bisect_rev_hex, oid_to_hex(bisect_rev), GIT_SHA1_HEXSZ + 1); |
ae077771 | 702 | update_ref(NULL, "BISECT_EXPECTED_REV", bisect_rev, NULL, 0, UPDATE_REFS_DIE_ON_ERR); |
ef24c7ca CC |
703 | |
704 | argv_checkout[2] = bisect_rev_hex; | |
fee92fc1 | 705 | if (no_checkout) { |
ae077771 | 706 | update_ref(NULL, "BISECT_HEAD", bisect_rev, NULL, 0, |
707 | UPDATE_REFS_DIE_ON_ERR); | |
fee92fc1 | 708 | } else { |
4824d1b8 | 709 | int res; |
fee92fc1 JS |
710 | res = run_command_v_opt(argv_checkout, RUN_GIT_CMD); |
711 | if (res) | |
712 | exit(res); | |
713 | } | |
ef24c7ca CC |
714 | |
715 | argv_show_branch[1] = bisect_rev_hex; | |
716 | return run_command_v_opt(argv_show_branch, RUN_GIT_CMD); | |
717 | } | |
718 | ||
ee3051bd | 719 | static struct commit *get_commit_reference(const struct object_id *oid) |
c0537662 | 720 | { |
bc83266a | 721 | struct commit *r = lookup_commit_reference(oid); |
c0537662 | 722 | if (!r) |
ee3051bd | 723 | die(_("Not a valid commit name %s"), oid_to_hex(oid)); |
c0537662 CC |
724 | return r; |
725 | } | |
726 | ||
727 | static struct commit **get_bad_and_good_commits(int *rev_nr) | |
728 | { | |
b32fa95f | 729 | struct commit **rev; |
c0537662 CC |
730 | int i, n = 0; |
731 | ||
b32fa95f | 732 | ALLOC_ARRAY(rev, 1 + good_revs.nr); |
ee3051bd | 733 | rev[n++] = get_commit_reference(current_bad_oid); |
902bb364 | 734 | for (i = 0; i < good_revs.nr; i++) |
ee3051bd | 735 | rev[n++] = get_commit_reference(good_revs.oid + i); |
c0537662 CC |
736 | *rev_nr = n; |
737 | ||
738 | return rev; | |
739 | } | |
740 | ||
741 | static void handle_bad_merge_base(void) | |
742 | { | |
3c5ff995 | 743 | if (is_expected_rev(current_bad_oid)) { |
744 | char *bad_hex = oid_to_hex(current_bad_oid); | |
c0537662 | 745 | char *good_hex = join_sha1_array_hex(&good_revs, ' '); |
43f9d9f3 | 746 | if (!strcmp(term_bad, "bad") && !strcmp(term_good, "good")) { |
14dc4899 | 747 | fprintf(stderr, _("The merge base %s is bad.\n" |
43f9d9f3 | 748 | "This means the bug has been fixed " |
14dc4899 | 749 | "between %s and [%s].\n"), |
43f9d9f3 | 750 | bad_hex, bad_hex, good_hex); |
21e5cfd8 | 751 | } else if (!strcmp(term_bad, "new") && !strcmp(term_good, "old")) { |
14dc4899 | 752 | fprintf(stderr, _("The merge base %s is new.\n" |
21e5cfd8 | 753 | "The property has changed " |
14dc4899 | 754 | "between %s and [%s].\n"), |
21e5cfd8 | 755 | bad_hex, bad_hex, good_hex); |
43f9d9f3 | 756 | } else { |
14dc4899 | 757 | fprintf(stderr, _("The merge base %s is %s.\n" |
43f9d9f3 | 758 | "This means the first '%s' commit is " |
14dc4899 | 759 | "between %s and [%s].\n"), |
43f9d9f3 AD |
760 | bad_hex, term_bad, term_good, bad_hex, good_hex); |
761 | } | |
c0537662 CC |
762 | exit(3); |
763 | } | |
764 | ||
3f407b76 | 765 | fprintf(stderr, _("Some %s revs are not ancestors of the %s rev.\n" |
c0537662 | 766 | "git bisect cannot work properly in this case.\n" |
14dc4899 | 767 | "Maybe you mistook %s and %s revs?\n"), |
43f9d9f3 | 768 | term_good, term_bad, term_good, term_bad); |
c0537662 CC |
769 | exit(1); |
770 | } | |
771 | ||
4ce3621a | 772 | static void handle_skipped_merge_base(const struct object_id *mb) |
c0537662 | 773 | { |
4ce3621a | 774 | char *mb_hex = oid_to_hex(mb); |
c368dde9 | 775 | char *bad_hex = oid_to_hex(current_bad_oid); |
c0537662 CC |
776 | char *good_hex = join_sha1_array_hex(&good_revs, ' '); |
777 | ||
14dc4899 | 778 | warning(_("the merge base between %s and [%s] " |
c0537662 | 779 | "must be skipped.\n" |
43f9d9f3 | 780 | "So we cannot be sure the first %s commit is " |
c0537662 | 781 | "between %s and %s.\n" |
14dc4899 | 782 | "We continue anyway."), |
43f9d9f3 | 783 | bad_hex, good_hex, term_bad, mb_hex, bad_hex); |
c0537662 CC |
784 | free(good_hex); |
785 | } | |
786 | ||
787 | /* | |
21e5cfd8 | 788 | * "check_merge_bases" checks that merge bases are not "bad" (or "new"). |
c0537662 | 789 | * |
21e5cfd8 | 790 | * - If one is "bad" (or "new"), it means the user assumed something wrong |
c0537662 | 791 | * and we must exit with a non 0 error code. |
21e5cfd8 | 792 | * - If one is "good" (or "old"), that's good, we have nothing to do. |
c0537662 CC |
793 | * - If one is "skipped", we can't know but we should warn. |
794 | * - If we don't know, we should check it out and ask the user to test. | |
795 | */ | |
148f14ab | 796 | static void check_merge_bases(int rev_nr, struct commit **rev, int no_checkout) |
c0537662 CC |
797 | { |
798 | struct commit_list *result; | |
c0537662 | 799 | |
2ce406cc | 800 | result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1); |
c0537662 CC |
801 | |
802 | for (; result; result = result->next) { | |
4ce3621a | 803 | const struct object_id *mb = &result->item->object.oid; |
804 | if (!oidcmp(mb, current_bad_oid)) { | |
c0537662 | 805 | handle_bad_merge_base(); |
910650d2 | 806 | } else if (0 <= oid_array_lookup(&good_revs, mb)) { |
c0537662 | 807 | continue; |
910650d2 | 808 | } else if (0 <= oid_array_lookup(&skipped_revs, mb)) { |
c0537662 CC |
809 | handle_skipped_merge_base(mb); |
810 | } else { | |
14dc4899 | 811 | printf(_("Bisecting: a merge base must be tested\n")); |
4be0deec | 812 | exit(bisect_checkout(mb, no_checkout)); |
c0537662 CC |
813 | } |
814 | } | |
815 | ||
c0537662 CC |
816 | free_commit_list(result); |
817 | } | |
818 | ||
148f14ab | 819 | static int check_ancestors(int rev_nr, struct commit **rev, const char *prefix) |
d937d4ac | 820 | { |
2d938fc7 | 821 | struct rev_info revs; |
86a0a408 | 822 | int res; |
d937d4ac | 823 | |
2d938fc7 | 824 | bisect_rev_setup(&revs, prefix, "^%s", "%s", 0); |
d937d4ac | 825 | |
2d938fc7 CC |
826 | bisect_common(&revs); |
827 | res = (revs.commits != NULL); | |
828 | ||
829 | /* Clean up objects used, as they will be reused. */ | |
148f14ab | 830 | clear_commit_marks_many(rev_nr, rev, ALL_REV_FLAGS); |
d937d4ac | 831 | |
2d938fc7 | 832 | return res; |
d937d4ac CC |
833 | } |
834 | ||
835 | /* | |
836 | * "check_good_are_ancestors_of_bad" checks that all "good" revs are | |
837 | * ancestor of the "bad" rev. | |
838 | * | |
839 | * If that's not the case, we need to check the merge bases. | |
840 | * If a merge base must be tested by the user, its source code will be | |
841 | * checked out to be tested by the user and we will exit. | |
842 | */ | |
fee92fc1 | 843 | static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout) |
d937d4ac | 844 | { |
d292bfaf | 845 | char *filename = git_pathdup("BISECT_ANCESTORS_OK"); |
d937d4ac | 846 | struct stat st; |
148f14ab RS |
847 | int fd, rev_nr; |
848 | struct commit **rev; | |
d937d4ac | 849 | |
3c5ff995 | 850 | if (!current_bad_oid) |
14dc4899 | 851 | die(_("a %s revision is needed"), term_bad); |
d937d4ac CC |
852 | |
853 | /* Check if file BISECT_ANCESTORS_OK exists. */ | |
854 | if (!stat(filename, &st) && S_ISREG(st.st_mode)) | |
144e7090 | 855 | goto done; |
d937d4ac CC |
856 | |
857 | /* Bisecting with no good rev is ok. */ | |
902bb364 | 858 | if (good_revs.nr == 0) |
144e7090 | 859 | goto done; |
d937d4ac | 860 | |
2d938fc7 | 861 | /* Check if all good revs are ancestor of the bad rev. */ |
148f14ab RS |
862 | rev = get_bad_and_good_commits(&rev_nr); |
863 | if (check_ancestors(rev_nr, rev, prefix)) | |
864 | check_merge_bases(rev_nr, rev, no_checkout); | |
865 | free(rev); | |
d937d4ac CC |
866 | |
867 | /* Create file BISECT_ANCESTORS_OK. */ | |
868 | fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600); | |
869 | if (fd < 0) | |
14dc4899 | 870 | warning_errno(_("could not create file '%s'"), |
23e7a312 | 871 | filename); |
d937d4ac CC |
872 | else |
873 | close(fd); | |
144e7090 MH |
874 | done: |
875 | free(filename); | |
d937d4ac CC |
876 | } |
877 | ||
e22278c0 CC |
878 | /* |
879 | * This does "git diff-tree --pretty COMMIT" without one fork+exec. | |
880 | */ | |
881 | static void show_diff_tree(const char *prefix, struct commit *commit) | |
882 | { | |
883 | struct rev_info opt; | |
884 | ||
885 | /* diff-tree init */ | |
886 | init_revisions(&opt, prefix); | |
887 | git_config(git_diff_basic_config, NULL); /* no "diff" UI options */ | |
888 | opt.abbrev = 0; | |
889 | opt.diff = 1; | |
890 | ||
891 | /* This is what "--pretty" does */ | |
892 | opt.verbose_header = 1; | |
893 | opt.use_terminator = 0; | |
894 | opt.commit_format = CMIT_FMT_DEFAULT; | |
895 | ||
896 | /* diff-tree init */ | |
897 | if (!opt.diffopt.output_format) | |
898 | opt.diffopt.output_format = DIFF_FORMAT_RAW; | |
899 | ||
43ec5509 | 900 | setup_revisions(0, NULL, &opt, NULL); |
e22278c0 CC |
901 | log_tree_commit(&opt, commit); |
902 | } | |
903 | ||
cb46d630 AD |
904 | /* |
905 | * The terms used for this bisect session are stored in BISECT_TERMS. | |
906 | * We read them and store them to adapt the messages accordingly. | |
907 | * Default is bad/good. | |
908 | */ | |
909 | void read_bisect_terms(const char **read_bad, const char **read_good) | |
910 | { | |
911 | struct strbuf str = STRBUF_INIT; | |
f5d284f6 | 912 | const char *filename = git_path_bisect_terms(); |
cb46d630 AD |
913 | FILE *fp = fopen(filename, "r"); |
914 | ||
915 | if (!fp) { | |
916 | if (errno == ENOENT) { | |
917 | *read_bad = "bad"; | |
918 | *read_good = "good"; | |
919 | return; | |
920 | } else { | |
14dc4899 | 921 | die_errno(_("could not read file '%s'"), filename); |
cb46d630 AD |
922 | } |
923 | } else { | |
8f309aeb | 924 | strbuf_getline_lf(&str, fp); |
cb46d630 | 925 | *read_bad = strbuf_detach(&str, NULL); |
8f309aeb | 926 | strbuf_getline_lf(&str, fp); |
cb46d630 AD |
927 | *read_good = strbuf_detach(&str, NULL); |
928 | } | |
929 | strbuf_release(&str); | |
930 | fclose(fp); | |
931 | } | |
932 | ||
ef24c7ca CC |
933 | /* |
934 | * We use the convention that exiting with an exit code 10 means that | |
935 | * the bisection process finished successfully. | |
936 | * In this case the calling shell script should exit 0. | |
fee92fc1 JS |
937 | * |
938 | * If no_checkout is non-zero, the bisection process does not | |
939 | * checkout the trial commit but instead simply updates BISECT_HEAD. | |
ef24c7ca | 940 | */ |
fee92fc1 | 941 | int bisect_next_all(const char *prefix, int no_checkout) |
ef24c7ca CC |
942 | { |
943 | struct rev_info revs; | |
944 | struct commit_list *tried; | |
6329bade | 945 | int reaches = 0, all = 0, nr, steps; |
4be0deec | 946 | struct object_id *bisect_rev; |
2cfa8357 | 947 | char *steps_msg; |
ef24c7ca | 948 | |
cb46d630 | 949 | read_bisect_terms(&term_bad, &term_good); |
2b020695 | 950 | if (read_bisect_refs()) |
14dc4899 | 951 | die(_("reading bisect refs failed")); |
2b020695 | 952 | |
fee92fc1 | 953 | check_good_are_ancestors_of_bad(prefix, no_checkout); |
0871984d | 954 | |
a22347c6 CC |
955 | bisect_rev_setup(&revs, prefix, "%s", "^%s", 1); |
956 | revs.limited = 1; | |
2b020695 | 957 | |
a22347c6 | 958 | bisect_common(&revs); |
ef24c7ca | 959 | |
24d707f6 | 960 | find_bisection(&revs.commits, &reaches, &all, !!skipped_revs.nr); |
62d0b0da | 961 | revs.commits = managed_skipped(revs.commits, &tried); |
ef24c7ca CC |
962 | |
963 | if (!revs.commits) { | |
964 | /* | |
965 | * We should exit here only if the "bad" | |
966 | * commit is also a "skip" commit. | |
967 | */ | |
968 | exit_if_skipped_commits(tried, NULL); | |
969 | ||
14dc4899 | 970 | printf(_("%s was both %s and %s\n"), |
43f9d9f3 AD |
971 | oid_to_hex(current_bad_oid), |
972 | term_good, | |
973 | term_bad); | |
ef24c7ca CC |
974 | exit(1); |
975 | } | |
976 | ||
8f69f72f | 977 | if (!all) { |
14dc4899 VA |
978 | fprintf(stderr, _("No testable commit found.\n" |
979 | "Maybe you started with bad path parameters?\n")); | |
8f69f72f CC |
980 | exit(4); |
981 | } | |
982 | ||
4be0deec | 983 | bisect_rev = &revs.commits->item->object.oid; |
ef24c7ca | 984 | |
4be0deec | 985 | if (!oidcmp(bisect_rev, current_bad_oid)) { |
3c5ff995 | 986 | exit_if_skipped_commits(tried, current_bad_oid); |
4be0deec | 987 | printf("%s is the first %s commit\n", oid_to_hex(bisect_rev), |
43f9d9f3 | 988 | term_bad); |
e22278c0 | 989 | show_diff_tree(prefix, revs.commits->item); |
ef24c7ca CC |
990 | /* This means the bisection process succeeded. */ |
991 | exit(10); | |
992 | } | |
993 | ||
994 | nr = all - reaches - 1; | |
6329bade | 995 | steps = estimate_bisect_steps(all); |
2cfa8357 MM |
996 | |
997 | steps_msg = xstrfmt(Q_("(roughly %d step)", "(roughly %d steps)", | |
998 | steps), steps); | |
66f5f6dc ÆAB |
999 | /* |
1000 | * TRANSLATORS: the last %s will be replaced with "(roughly %d | |
1001 | * steps)" translation. | |
1002 | */ | |
14dc4899 VA |
1003 | printf(Q_("Bisecting: %d revision left to test after this %s\n", |
1004 | "Bisecting: %d revisions left to test after this %s\n", | |
1005 | nr), nr, steps_msg); | |
2cfa8357 | 1006 | free(steps_msg); |
ef24c7ca | 1007 | |
f3a97718 | 1008 | return bisect_checkout(bisect_rev, no_checkout); |
ef24c7ca CC |
1009 | } |
1010 | ||
c43cb386 NTND |
1011 | static inline int log2i(int n) |
1012 | { | |
1013 | int log2 = 0; | |
1014 | ||
1015 | for (; n > 1; n >>= 1) | |
1016 | log2++; | |
1017 | ||
1018 | return log2; | |
1019 | } | |
1020 | ||
1021 | static inline int exp2i(int n) | |
1022 | { | |
1023 | return 1 << n; | |
1024 | } | |
1025 | ||
1026 | /* | |
1027 | * Estimate the number of bisect steps left (after the current step) | |
1028 | * | |
1029 | * For any x between 0 included and 2^n excluded, the probability for | |
1030 | * n - 1 steps left looks like: | |
1031 | * | |
1032 | * P(2^n + x) == (2^n - x) / (2^n + x) | |
1033 | * | |
1034 | * and P(2^n + x) < 0.5 means 2^n < 3x | |
1035 | */ | |
1036 | int estimate_bisect_steps(int all) | |
1037 | { | |
1038 | int n, x, e; | |
1039 | ||
1040 | if (all < 3) | |
1041 | return 0; | |
1042 | ||
1043 | n = log2i(all); | |
1044 | e = exp2i(n); | |
1045 | x = all - e; | |
1046 | ||
1047 | return (e < 3 * x) ? n : n - 1; | |
1048 | } | |
fb71a329 PB |
1049 | |
1050 | static int mark_for_removal(const char *refname, const struct object_id *oid, | |
1051 | int flag, void *cb_data) | |
1052 | { | |
1053 | struct string_list *refs = cb_data; | |
1054 | char *ref = xstrfmt("refs/bisect%s", refname); | |
1055 | string_list_append(refs, ref); | |
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | int bisect_clean_state(void) | |
1060 | { | |
1061 | int result = 0; | |
1062 | ||
1063 | /* There may be some refs packed during bisection */ | |
1064 | struct string_list refs_for_removal = STRING_LIST_INIT_NODUP; | |
1065 | for_each_ref_in("refs/bisect", mark_for_removal, (void *) &refs_for_removal); | |
1066 | string_list_append(&refs_for_removal, xstrdup("BISECT_HEAD")); | |
a9722297 | 1067 | result = delete_refs("bisect: remove", &refs_for_removal, REF_NO_DEREF); |
fb71a329 PB |
1068 | refs_for_removal.strdup_strings = 1; |
1069 | string_list_clear(&refs_for_removal, 0); | |
1070 | unlink_or_warn(git_path_bisect_expected_rev()); | |
1071 | unlink_or_warn(git_path_bisect_ancestors_ok()); | |
1072 | unlink_or_warn(git_path_bisect_log()); | |
1073 | unlink_or_warn(git_path_bisect_names()); | |
1074 | unlink_or_warn(git_path_bisect_run()); | |
1075 | unlink_or_warn(git_path_bisect_terms()); | |
1076 | /* Cleanup head-name if it got left by an old version of git-bisect */ | |
1077 | unlink_or_warn(git_path_head_name()); | |
1078 | /* | |
1079 | * Cleanup BISECT_START last to support the --no-checkout option | |
1080 | * introduced in the commit 4796e823a. | |
1081 | */ | |
1082 | unlink_or_warn(git_path_bisect_start()); | |
1083 | ||
1084 | return result; | |
1085 | } |