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1 | /* | |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
6 | ||
7 | #include "cache.h" | |
8 | ||
9 | /* | |
10 | * This is like mktime, but without normalization of tm_wday and tm_yday. | |
11 | */ | |
12 | static time_t tm_to_time_t(const struct tm *tm) | |
13 | { | |
14 | static const int mdays[] = { | |
15 | 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 | |
16 | }; | |
17 | int year = tm->tm_year - 70; | |
18 | int month = tm->tm_mon; | |
19 | int day = tm->tm_mday; | |
20 | ||
21 | if (year < 0 || year > 129) /* algo only works for 1970-2099 */ | |
22 | return -1; | |
23 | if (month < 0 || month > 11) /* array bounds */ | |
24 | return -1; | |
25 | if (month < 2 || (year + 2) % 4) | |
26 | day--; | |
27 | if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_sec < 0) | |
28 | return -1; | |
29 | return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24*60*60UL + | |
30 | tm->tm_hour * 60*60 + tm->tm_min * 60 + tm->tm_sec; | |
31 | } | |
32 | ||
33 | static const char *month_names[] = { | |
34 | "January", "February", "March", "April", "May", "June", | |
35 | "July", "August", "September", "October", "November", "December" | |
36 | }; | |
37 | ||
38 | static const char *weekday_names[] = { | |
39 | "Sundays", "Mondays", "Tuesdays", "Wednesdays", "Thursdays", "Fridays", "Saturdays" | |
40 | }; | |
41 | ||
42 | static time_t gm_time_t(timestamp_t time, int tz) | |
43 | { | |
44 | int minutes; | |
45 | ||
46 | minutes = tz < 0 ? -tz : tz; | |
47 | minutes = (minutes / 100)*60 + (minutes % 100); | |
48 | minutes = tz < 0 ? -minutes : minutes; | |
49 | ||
50 | if (minutes > 0) { | |
51 | if (unsigned_add_overflows(time, minutes * 60)) | |
52 | die("Timestamp+tz too large: %"PRItime" +%04d", | |
53 | time, tz); | |
54 | } else if (time < -minutes * 60) | |
55 | die("Timestamp before Unix epoch: %"PRItime" %04d", time, tz); | |
56 | time += minutes * 60; | |
57 | if (date_overflows(time)) | |
58 | die("Timestamp too large for this system: %"PRItime, time); | |
59 | return (time_t)time; | |
60 | } | |
61 | ||
62 | /* | |
63 | * The "tz" thing is passed in as this strange "decimal parse of tz" | |
64 | * thing, which means that tz -0100 is passed in as the integer -100, | |
65 | * even though it means "sixty minutes off" | |
66 | */ | |
67 | static struct tm *time_to_tm(timestamp_t time, int tz, struct tm *tm) | |
68 | { | |
69 | time_t t = gm_time_t(time, tz); | |
70 | return gmtime_r(&t, tm); | |
71 | } | |
72 | ||
73 | static struct tm *time_to_tm_local(timestamp_t time, struct tm *tm) | |
74 | { | |
75 | time_t t = time; | |
76 | return localtime_r(&t, tm); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Fill in the localtime 'struct tm' for the supplied time, | |
81 | * and return the local tz. | |
82 | */ | |
83 | static int local_time_tzoffset(time_t t, struct tm *tm) | |
84 | { | |
85 | time_t t_local; | |
86 | int offset, eastwest; | |
87 | ||
88 | localtime_r(&t, tm); | |
89 | t_local = tm_to_time_t(tm); | |
90 | if (t_local == -1) | |
91 | return 0; /* error; just use +0000 */ | |
92 | if (t_local < t) { | |
93 | eastwest = -1; | |
94 | offset = t - t_local; | |
95 | } else { | |
96 | eastwest = 1; | |
97 | offset = t_local - t; | |
98 | } | |
99 | offset /= 60; /* in minutes */ | |
100 | offset = (offset % 60) + ((offset / 60) * 100); | |
101 | return offset * eastwest; | |
102 | } | |
103 | ||
104 | /* | |
105 | * What value of "tz" was in effect back then at "time" in the | |
106 | * local timezone? | |
107 | */ | |
108 | static int local_tzoffset(timestamp_t time) | |
109 | { | |
110 | struct tm tm; | |
111 | ||
112 | if (date_overflows(time)) | |
113 | die("Timestamp too large for this system: %"PRItime, time); | |
114 | ||
115 | return local_time_tzoffset((time_t)time, &tm); | |
116 | } | |
117 | ||
118 | static void get_time(struct timeval *now) | |
119 | { | |
120 | const char *x; | |
121 | ||
122 | x = getenv("GIT_TEST_DATE_NOW"); | |
123 | if (x) { | |
124 | now->tv_sec = atoi(x); | |
125 | now->tv_usec = 0; | |
126 | } | |
127 | else | |
128 | gettimeofday(now, NULL); | |
129 | } | |
130 | ||
131 | void show_date_relative(timestamp_t time, struct strbuf *timebuf) | |
132 | { | |
133 | struct timeval now; | |
134 | timestamp_t diff; | |
135 | ||
136 | get_time(&now); | |
137 | if (now.tv_sec < time) { | |
138 | strbuf_addstr(timebuf, _("in the future")); | |
139 | return; | |
140 | } | |
141 | diff = now.tv_sec - time; | |
142 | if (diff < 90) { | |
143 | strbuf_addf(timebuf, | |
144 | Q_("%"PRItime" second ago", "%"PRItime" seconds ago", diff), diff); | |
145 | return; | |
146 | } | |
147 | /* Turn it into minutes */ | |
148 | diff = (diff + 30) / 60; | |
149 | if (diff < 90) { | |
150 | strbuf_addf(timebuf, | |
151 | Q_("%"PRItime" minute ago", "%"PRItime" minutes ago", diff), diff); | |
152 | return; | |
153 | } | |
154 | /* Turn it into hours */ | |
155 | diff = (diff + 30) / 60; | |
156 | if (diff < 36) { | |
157 | strbuf_addf(timebuf, | |
158 | Q_("%"PRItime" hour ago", "%"PRItime" hours ago", diff), diff); | |
159 | return; | |
160 | } | |
161 | /* We deal with number of days from here on */ | |
162 | diff = (diff + 12) / 24; | |
163 | if (diff < 14) { | |
164 | strbuf_addf(timebuf, | |
165 | Q_("%"PRItime" day ago", "%"PRItime" days ago", diff), diff); | |
166 | return; | |
167 | } | |
168 | /* Say weeks for the past 10 weeks or so */ | |
169 | if (diff < 70) { | |
170 | strbuf_addf(timebuf, | |
171 | Q_("%"PRItime" week ago", "%"PRItime" weeks ago", (diff + 3) / 7), | |
172 | (diff + 3) / 7); | |
173 | return; | |
174 | } | |
175 | /* Say months for the past 12 months or so */ | |
176 | if (diff < 365) { | |
177 | strbuf_addf(timebuf, | |
178 | Q_("%"PRItime" month ago", "%"PRItime" months ago", (diff + 15) / 30), | |
179 | (diff + 15) / 30); | |
180 | return; | |
181 | } | |
182 | /* Give years and months for 5 years or so */ | |
183 | if (diff < 1825) { | |
184 | timestamp_t totalmonths = (diff * 12 * 2 + 365) / (365 * 2); | |
185 | timestamp_t years = totalmonths / 12; | |
186 | timestamp_t months = totalmonths % 12; | |
187 | if (months) { | |
188 | struct strbuf sb = STRBUF_INIT; | |
189 | strbuf_addf(&sb, Q_("%"PRItime" year", "%"PRItime" years", years), years); | |
190 | strbuf_addf(timebuf, | |
191 | /* TRANSLATORS: "%s" is "<n> years" */ | |
192 | Q_("%s, %"PRItime" month ago", "%s, %"PRItime" months ago", months), | |
193 | sb.buf, months); | |
194 | strbuf_release(&sb); | |
195 | } else | |
196 | strbuf_addf(timebuf, | |
197 | Q_("%"PRItime" year ago", "%"PRItime" years ago", years), years); | |
198 | return; | |
199 | } | |
200 | /* Otherwise, just years. Centuries is probably overkill. */ | |
201 | strbuf_addf(timebuf, | |
202 | Q_("%"PRItime" year ago", "%"PRItime" years ago", (diff + 183) / 365), | |
203 | (diff + 183) / 365); | |
204 | } | |
205 | ||
206 | struct date_mode *date_mode_from_type(enum date_mode_type type) | |
207 | { | |
208 | static struct date_mode mode; | |
209 | if (type == DATE_STRFTIME) | |
210 | BUG("cannot create anonymous strftime date_mode struct"); | |
211 | mode.type = type; | |
212 | mode.local = 0; | |
213 | return &mode; | |
214 | } | |
215 | ||
216 | static void show_date_normal(struct strbuf *buf, timestamp_t time, struct tm *tm, int tz, struct tm *human_tm, int human_tz, int local) | |
217 | { | |
218 | struct { | |
219 | unsigned int year:1, | |
220 | date:1, | |
221 | wday:1, | |
222 | time:1, | |
223 | seconds:1, | |
224 | tz:1; | |
225 | } hide = { 0 }; | |
226 | ||
227 | hide.tz = local || tz == human_tz; | |
228 | hide.year = tm->tm_year == human_tm->tm_year; | |
229 | if (hide.year) { | |
230 | if (tm->tm_mon == human_tm->tm_mon) { | |
231 | if (tm->tm_mday > human_tm->tm_mday) { | |
232 | /* Future date: think timezones */ | |
233 | } else if (tm->tm_mday == human_tm->tm_mday) { | |
234 | hide.date = hide.wday = 1; | |
235 | } else if (tm->tm_mday + 5 > human_tm->tm_mday) { | |
236 | /* Leave just weekday if it was a few days ago */ | |
237 | hide.date = 1; | |
238 | } | |
239 | } | |
240 | } | |
241 | ||
242 | /* Show "today" times as just relative times */ | |
243 | if (hide.wday) { | |
244 | show_date_relative(time, buf); | |
245 | return; | |
246 | } | |
247 | ||
248 | /* | |
249 | * Always hide seconds for human-readable. | |
250 | * Hide timezone if showing date. | |
251 | * Hide weekday and time if showing year. | |
252 | * | |
253 | * The logic here is two-fold: | |
254 | * (a) only show details when recent enough to matter | |
255 | * (b) keep the maximum length "similar", and in check | |
256 | */ | |
257 | if (human_tm->tm_year) { | |
258 | hide.seconds = 1; | |
259 | hide.tz |= !hide.date; | |
260 | hide.wday = hide.time = !hide.year; | |
261 | } | |
262 | ||
263 | if (!hide.wday) | |
264 | strbuf_addf(buf, "%.3s ", weekday_names[tm->tm_wday]); | |
265 | if (!hide.date) | |
266 | strbuf_addf(buf, "%.3s %d ", month_names[tm->tm_mon], tm->tm_mday); | |
267 | ||
268 | /* Do we want AM/PM depending on locale? */ | |
269 | if (!hide.time) { | |
270 | strbuf_addf(buf, "%02d:%02d", tm->tm_hour, tm->tm_min); | |
271 | if (!hide.seconds) | |
272 | strbuf_addf(buf, ":%02d", tm->tm_sec); | |
273 | } else | |
274 | strbuf_rtrim(buf); | |
275 | ||
276 | if (!hide.year) | |
277 | strbuf_addf(buf, " %d", tm->tm_year + 1900); | |
278 | ||
279 | if (!hide.tz) | |
280 | strbuf_addf(buf, " %+05d", tz); | |
281 | } | |
282 | ||
283 | const char *show_date(timestamp_t time, int tz, const struct date_mode *mode) | |
284 | { | |
285 | struct tm *tm; | |
286 | struct tm tmbuf = { 0 }; | |
287 | struct tm human_tm = { 0 }; | |
288 | int human_tz = -1; | |
289 | static struct strbuf timebuf = STRBUF_INIT; | |
290 | ||
291 | if (mode->type == DATE_UNIX) { | |
292 | strbuf_reset(&timebuf); | |
293 | strbuf_addf(&timebuf, "%"PRItime, time); | |
294 | return timebuf.buf; | |
295 | } | |
296 | ||
297 | if (mode->type == DATE_HUMAN) { | |
298 | struct timeval now; | |
299 | ||
300 | get_time(&now); | |
301 | ||
302 | /* Fill in the data for "current time" in human_tz and human_tm */ | |
303 | human_tz = local_time_tzoffset(now.tv_sec, &human_tm); | |
304 | } | |
305 | ||
306 | if (mode->local) | |
307 | tz = local_tzoffset(time); | |
308 | ||
309 | if (mode->type == DATE_RAW) { | |
310 | strbuf_reset(&timebuf); | |
311 | strbuf_addf(&timebuf, "%"PRItime" %+05d", time, tz); | |
312 | return timebuf.buf; | |
313 | } | |
314 | ||
315 | if (mode->type == DATE_RELATIVE) { | |
316 | strbuf_reset(&timebuf); | |
317 | show_date_relative(time, &timebuf); | |
318 | return timebuf.buf; | |
319 | } | |
320 | ||
321 | if (mode->local) | |
322 | tm = time_to_tm_local(time, &tmbuf); | |
323 | else | |
324 | tm = time_to_tm(time, tz, &tmbuf); | |
325 | if (!tm) { | |
326 | tm = time_to_tm(0, 0, &tmbuf); | |
327 | tz = 0; | |
328 | } | |
329 | ||
330 | strbuf_reset(&timebuf); | |
331 | if (mode->type == DATE_SHORT) | |
332 | strbuf_addf(&timebuf, "%04d-%02d-%02d", tm->tm_year + 1900, | |
333 | tm->tm_mon + 1, tm->tm_mday); | |
334 | else if (mode->type == DATE_ISO8601) | |
335 | strbuf_addf(&timebuf, "%04d-%02d-%02d %02d:%02d:%02d %+05d", | |
336 | tm->tm_year + 1900, | |
337 | tm->tm_mon + 1, | |
338 | tm->tm_mday, | |
339 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
340 | tz); | |
341 | else if (mode->type == DATE_ISO8601_STRICT) { | |
342 | char sign = (tz >= 0) ? '+' : '-'; | |
343 | tz = abs(tz); | |
344 | strbuf_addf(&timebuf, "%04d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d", | |
345 | tm->tm_year + 1900, | |
346 | tm->tm_mon + 1, | |
347 | tm->tm_mday, | |
348 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
349 | sign, tz / 100, tz % 100); | |
350 | } else if (mode->type == DATE_RFC2822) | |
351 | strbuf_addf(&timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d", | |
352 | weekday_names[tm->tm_wday], tm->tm_mday, | |
353 | month_names[tm->tm_mon], tm->tm_year + 1900, | |
354 | tm->tm_hour, tm->tm_min, tm->tm_sec, tz); | |
355 | else if (mode->type == DATE_STRFTIME) | |
356 | strbuf_addftime(&timebuf, mode->strftime_fmt, tm, tz, | |
357 | !mode->local); | |
358 | else | |
359 | show_date_normal(&timebuf, time, tm, tz, &human_tm, human_tz, mode->local); | |
360 | return timebuf.buf; | |
361 | } | |
362 | ||
363 | /* | |
364 | * Check these. And note how it doesn't do the summer-time conversion. | |
365 | * | |
366 | * In my world, it's always summer, and things are probably a bit off | |
367 | * in other ways too. | |
368 | */ | |
369 | static const struct { | |
370 | const char *name; | |
371 | int offset; | |
372 | int dst; | |
373 | } timezone_names[] = { | |
374 | { "IDLW", -12, 0, }, /* International Date Line West */ | |
375 | { "NT", -11, 0, }, /* Nome */ | |
376 | { "CAT", -10, 0, }, /* Central Alaska */ | |
377 | { "HST", -10, 0, }, /* Hawaii Standard */ | |
378 | { "HDT", -10, 1, }, /* Hawaii Daylight */ | |
379 | { "YST", -9, 0, }, /* Yukon Standard */ | |
380 | { "YDT", -9, 1, }, /* Yukon Daylight */ | |
381 | { "PST", -8, 0, }, /* Pacific Standard */ | |
382 | { "PDT", -8, 1, }, /* Pacific Daylight */ | |
383 | { "MST", -7, 0, }, /* Mountain Standard */ | |
384 | { "MDT", -7, 1, }, /* Mountain Daylight */ | |
385 | { "CST", -6, 0, }, /* Central Standard */ | |
386 | { "CDT", -6, 1, }, /* Central Daylight */ | |
387 | { "EST", -5, 0, }, /* Eastern Standard */ | |
388 | { "EDT", -5, 1, }, /* Eastern Daylight */ | |
389 | { "AST", -3, 0, }, /* Atlantic Standard */ | |
390 | { "ADT", -3, 1, }, /* Atlantic Daylight */ | |
391 | { "WAT", -1, 0, }, /* West Africa */ | |
392 | ||
393 | { "GMT", 0, 0, }, /* Greenwich Mean */ | |
394 | { "UTC", 0, 0, }, /* Universal (Coordinated) */ | |
395 | { "Z", 0, 0, }, /* Zulu, alias for UTC */ | |
396 | ||
397 | { "WET", 0, 0, }, /* Western European */ | |
398 | { "BST", 0, 1, }, /* British Summer */ | |
399 | { "CET", +1, 0, }, /* Central European */ | |
400 | { "MET", +1, 0, }, /* Middle European */ | |
401 | { "MEWT", +1, 0, }, /* Middle European Winter */ | |
402 | { "MEST", +1, 1, }, /* Middle European Summer */ | |
403 | { "CEST", +1, 1, }, /* Central European Summer */ | |
404 | { "MESZ", +1, 1, }, /* Middle European Summer */ | |
405 | { "FWT", +1, 0, }, /* French Winter */ | |
406 | { "FST", +1, 1, }, /* French Summer */ | |
407 | { "EET", +2, 0, }, /* Eastern Europe, USSR Zone 1 */ | |
408 | { "EEST", +2, 1, }, /* Eastern European Daylight */ | |
409 | { "WAST", +7, 0, }, /* West Australian Standard */ | |
410 | { "WADT", +7, 1, }, /* West Australian Daylight */ | |
411 | { "CCT", +8, 0, }, /* China Coast, USSR Zone 7 */ | |
412 | { "JST", +9, 0, }, /* Japan Standard, USSR Zone 8 */ | |
413 | { "EAST", +10, 0, }, /* Eastern Australian Standard */ | |
414 | { "EADT", +10, 1, }, /* Eastern Australian Daylight */ | |
415 | { "GST", +10, 0, }, /* Guam Standard, USSR Zone 9 */ | |
416 | { "NZT", +12, 0, }, /* New Zealand */ | |
417 | { "NZST", +12, 0, }, /* New Zealand Standard */ | |
418 | { "NZDT", +12, 1, }, /* New Zealand Daylight */ | |
419 | { "IDLE", +12, 0, }, /* International Date Line East */ | |
420 | }; | |
421 | ||
422 | static int match_string(const char *date, const char *str) | |
423 | { | |
424 | int i = 0; | |
425 | ||
426 | for (i = 0; *date; date++, str++, i++) { | |
427 | if (*date == *str) | |
428 | continue; | |
429 | if (toupper(*date) == toupper(*str)) | |
430 | continue; | |
431 | if (!isalnum(*date)) | |
432 | break; | |
433 | return 0; | |
434 | } | |
435 | return i; | |
436 | } | |
437 | ||
438 | static int skip_alpha(const char *date) | |
439 | { | |
440 | int i = 0; | |
441 | do { | |
442 | i++; | |
443 | } while (isalpha(date[i])); | |
444 | return i; | |
445 | } | |
446 | ||
447 | /* | |
448 | * Parse month, weekday, or timezone name | |
449 | */ | |
450 | static int match_alpha(const char *date, struct tm *tm, int *offset) | |
451 | { | |
452 | int i; | |
453 | ||
454 | for (i = 0; i < 12; i++) { | |
455 | int match = match_string(date, month_names[i]); | |
456 | if (match >= 3) { | |
457 | tm->tm_mon = i; | |
458 | return match; | |
459 | } | |
460 | } | |
461 | ||
462 | for (i = 0; i < 7; i++) { | |
463 | int match = match_string(date, weekday_names[i]); | |
464 | if (match >= 3) { | |
465 | tm->tm_wday = i; | |
466 | return match; | |
467 | } | |
468 | } | |
469 | ||
470 | for (i = 0; i < ARRAY_SIZE(timezone_names); i++) { | |
471 | int match = match_string(date, timezone_names[i].name); | |
472 | if (match >= 3 || match == strlen(timezone_names[i].name)) { | |
473 | int off = timezone_names[i].offset; | |
474 | ||
475 | /* This is bogus, but we like summer */ | |
476 | off += timezone_names[i].dst; | |
477 | ||
478 | /* Only use the tz name offset if we don't have anything better */ | |
479 | if (*offset == -1) | |
480 | *offset = 60*off; | |
481 | ||
482 | return match; | |
483 | } | |
484 | } | |
485 | ||
486 | if (match_string(date, "PM") == 2) { | |
487 | tm->tm_hour = (tm->tm_hour % 12) + 12; | |
488 | return 2; | |
489 | } | |
490 | ||
491 | if (match_string(date, "AM") == 2) { | |
492 | tm->tm_hour = (tm->tm_hour % 12) + 0; | |
493 | return 2; | |
494 | } | |
495 | ||
496 | /* BAD CRAP */ | |
497 | return skip_alpha(date); | |
498 | } | |
499 | ||
500 | static int set_date(int year, int month, int day, struct tm *now_tm, time_t now, struct tm *tm) | |
501 | { | |
502 | if (month > 0 && month < 13 && day > 0 && day < 32) { | |
503 | struct tm check = *tm; | |
504 | struct tm *r = (now_tm ? &check : tm); | |
505 | time_t specified; | |
506 | ||
507 | r->tm_mon = month - 1; | |
508 | r->tm_mday = day; | |
509 | if (year == -1) { | |
510 | if (!now_tm) | |
511 | return 1; | |
512 | r->tm_year = now_tm->tm_year; | |
513 | } | |
514 | else if (year >= 1970 && year < 2100) | |
515 | r->tm_year = year - 1900; | |
516 | else if (year > 70 && year < 100) | |
517 | r->tm_year = year; | |
518 | else if (year < 38) | |
519 | r->tm_year = year + 100; | |
520 | else | |
521 | return -1; | |
522 | if (!now_tm) | |
523 | return 0; | |
524 | ||
525 | specified = tm_to_time_t(r); | |
526 | ||
527 | /* Be it commit time or author time, it does not make | |
528 | * sense to specify timestamp way into the future. Make | |
529 | * sure it is not later than ten days from now... | |
530 | */ | |
531 | if ((specified != -1) && (now + 10*24*3600 < specified)) | |
532 | return -1; | |
533 | tm->tm_mon = r->tm_mon; | |
534 | tm->tm_mday = r->tm_mday; | |
535 | if (year != -1) | |
536 | tm->tm_year = r->tm_year; | |
537 | return 0; | |
538 | } | |
539 | return -1; | |
540 | } | |
541 | ||
542 | static int set_time(long hour, long minute, long second, struct tm *tm) | |
543 | { | |
544 | /* We accept 61st second because of leap second */ | |
545 | if (0 <= hour && hour <= 24 && | |
546 | 0 <= minute && minute < 60 && | |
547 | 0 <= second && second <= 60) { | |
548 | tm->tm_hour = hour; | |
549 | tm->tm_min = minute; | |
550 | tm->tm_sec = second; | |
551 | return 0; | |
552 | } | |
553 | return -1; | |
554 | } | |
555 | ||
556 | static int is_date_known(struct tm *tm) | |
557 | { | |
558 | return tm->tm_year != -1 && tm->tm_mon != -1 && tm->tm_mday != -1; | |
559 | } | |
560 | ||
561 | static int match_multi_number(timestamp_t num, char c, const char *date, | |
562 | char *end, struct tm *tm, time_t now) | |
563 | { | |
564 | struct tm now_tm; | |
565 | struct tm *refuse_future; | |
566 | long num2, num3; | |
567 | ||
568 | num2 = strtol(end+1, &end, 10); | |
569 | num3 = -1; | |
570 | if (*end == c && isdigit(end[1])) | |
571 | num3 = strtol(end+1, &end, 10); | |
572 | ||
573 | /* Time? Date? */ | |
574 | switch (c) { | |
575 | case ':': | |
576 | if (num3 < 0) | |
577 | num3 = 0; | |
578 | if (set_time(num, num2, num3, tm) == 0) { | |
579 | /* | |
580 | * If %H:%M:%S was just parsed followed by: .<num4> | |
581 | * Consider (& discard) it as fractional second | |
582 | * if %Y%m%d is parsed before. | |
583 | */ | |
584 | if (*end == '.' && isdigit(end[1]) && is_date_known(tm)) | |
585 | strtol(end + 1, &end, 10); | |
586 | break; | |
587 | } | |
588 | return 0; | |
589 | ||
590 | case '-': | |
591 | case '/': | |
592 | case '.': | |
593 | if (!now) | |
594 | now = time(NULL); | |
595 | refuse_future = NULL; | |
596 | if (gmtime_r(&now, &now_tm)) | |
597 | refuse_future = &now_tm; | |
598 | ||
599 | if (num > 70) { | |
600 | /* yyyy-mm-dd? */ | |
601 | if (set_date(num, num2, num3, NULL, now, tm) == 0) | |
602 | break; | |
603 | /* yyyy-dd-mm? */ | |
604 | if (set_date(num, num3, num2, NULL, now, tm) == 0) | |
605 | break; | |
606 | } | |
607 | /* Our eastern European friends say dd.mm.yy[yy] | |
608 | * is the norm there, so giving precedence to | |
609 | * mm/dd/yy[yy] form only when separator is not '.' | |
610 | */ | |
611 | if (c != '.' && | |
612 | set_date(num3, num, num2, refuse_future, now, tm) == 0) | |
613 | break; | |
614 | /* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */ | |
615 | if (set_date(num3, num2, num, refuse_future, now, tm) == 0) | |
616 | break; | |
617 | /* Funny European mm.dd.yy */ | |
618 | if (c == '.' && | |
619 | set_date(num3, num, num2, refuse_future, now, tm) == 0) | |
620 | break; | |
621 | return 0; | |
622 | } | |
623 | return end - date; | |
624 | } | |
625 | ||
626 | /* | |
627 | * Have we filled in any part of the time/date yet? | |
628 | * We just do a binary 'and' to see if the sign bit | |
629 | * is set in all the values. | |
630 | */ | |
631 | static inline int nodate(struct tm *tm) | |
632 | { | |
633 | return (tm->tm_year & | |
634 | tm->tm_mon & | |
635 | tm->tm_mday & | |
636 | tm->tm_hour & | |
637 | tm->tm_min & | |
638 | tm->tm_sec) < 0; | |
639 | } | |
640 | ||
641 | /* | |
642 | * We've seen a digit. Time? Year? Date? | |
643 | */ | |
644 | static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt) | |
645 | { | |
646 | int n; | |
647 | char *end; | |
648 | timestamp_t num; | |
649 | ||
650 | num = parse_timestamp(date, &end, 10); | |
651 | ||
652 | /* | |
653 | * Seconds since 1970? We trigger on that for any numbers with | |
654 | * more than 8 digits. This is because we don't want to rule out | |
655 | * numbers like 20070606 as a YYYYMMDD date. | |
656 | */ | |
657 | if (num >= 100000000 && nodate(tm)) { | |
658 | time_t time = num; | |
659 | if (gmtime_r(&time, tm)) { | |
660 | *tm_gmt = 1; | |
661 | return end - date; | |
662 | } | |
663 | } | |
664 | ||
665 | /* | |
666 | * Check for special formats: num[-.:/]num[same]num | |
667 | */ | |
668 | switch (*end) { | |
669 | case ':': | |
670 | case '.': | |
671 | case '/': | |
672 | case '-': | |
673 | if (isdigit(end[1])) { | |
674 | int match = match_multi_number(num, *end, date, end, tm, 0); | |
675 | if (match) | |
676 | return match; | |
677 | } | |
678 | } | |
679 | ||
680 | /* | |
681 | * None of the special formats? Try to guess what | |
682 | * the number meant. We use the number of digits | |
683 | * to make a more educated guess.. | |
684 | */ | |
685 | n = 0; | |
686 | do { | |
687 | n++; | |
688 | } while (isdigit(date[n])); | |
689 | ||
690 | /* 8 digits, compact style of ISO-8601's date: YYYYmmDD */ | |
691 | /* 6 digits, compact style of ISO-8601's time: HHMMSS */ | |
692 | if (n == 8 || n == 6) { | |
693 | unsigned int num1 = num / 10000; | |
694 | unsigned int num2 = (num % 10000) / 100; | |
695 | unsigned int num3 = num % 100; | |
696 | if (n == 8) | |
697 | set_date(num1, num2, num3, NULL, time(NULL), tm); | |
698 | else if (n == 6 && set_time(num1, num2, num3, tm) == 0 && | |
699 | *end == '.' && isdigit(end[1])) | |
700 | strtoul(end + 1, &end, 10); | |
701 | return end - date; | |
702 | } | |
703 | ||
704 | /* Four-digit year or a timezone? */ | |
705 | if (n == 4) { | |
706 | if (num <= 1400 && *offset == -1) { | |
707 | unsigned int minutes = num % 100; | |
708 | unsigned int hours = num / 100; | |
709 | *offset = hours*60 + minutes; | |
710 | } else if (num > 1900 && num < 2100) | |
711 | tm->tm_year = num - 1900; | |
712 | return n; | |
713 | } | |
714 | ||
715 | /* | |
716 | * Ignore lots of numerals. We took care of 4-digit years above. | |
717 | * Days or months must be one or two digits. | |
718 | */ | |
719 | if (n > 2) | |
720 | return n; | |
721 | ||
722 | /* | |
723 | * NOTE! We will give precedence to day-of-month over month or | |
724 | * year numbers in the 1-12 range. So 05 is always "mday 5", | |
725 | * unless we already have a mday.. | |
726 | * | |
727 | * IOW, 01 Apr 05 parses as "April 1st, 2005". | |
728 | */ | |
729 | if (num > 0 && num < 32 && tm->tm_mday < 0) { | |
730 | tm->tm_mday = num; | |
731 | return n; | |
732 | } | |
733 | ||
734 | /* Two-digit year? */ | |
735 | if (n == 2 && tm->tm_year < 0) { | |
736 | if (num < 10 && tm->tm_mday >= 0) { | |
737 | tm->tm_year = num + 100; | |
738 | return n; | |
739 | } | |
740 | if (num >= 70) { | |
741 | tm->tm_year = num; | |
742 | return n; | |
743 | } | |
744 | } | |
745 | ||
746 | if (num > 0 && num < 13 && tm->tm_mon < 0) | |
747 | tm->tm_mon = num-1; | |
748 | ||
749 | return n; | |
750 | } | |
751 | ||
752 | static int match_tz(const char *date, int *offp) | |
753 | { | |
754 | char *end; | |
755 | int hour = strtoul(date + 1, &end, 10); | |
756 | int n = end - (date + 1); | |
757 | int min = 0; | |
758 | ||
759 | if (n == 4) { | |
760 | /* hhmm */ | |
761 | min = hour % 100; | |
762 | hour = hour / 100; | |
763 | } else if (n != 2) { | |
764 | min = 99; /* random crap */ | |
765 | } else if (*end == ':') { | |
766 | /* hh:mm? */ | |
767 | min = strtoul(end + 1, &end, 10); | |
768 | if (end - (date + 1) != 5) | |
769 | min = 99; /* random crap */ | |
770 | } /* otherwise we parsed "hh" */ | |
771 | ||
772 | /* | |
773 | * Don't accept any random crap. Even though some places have | |
774 | * offset larger than 12 hours (e.g. Pacific/Kiritimati is at | |
775 | * UTC+14), there is something wrong if hour part is much | |
776 | * larger than that. We might also want to check that the | |
777 | * minutes are divisible by 15 or something too. (Offset of | |
778 | * Kathmandu, Nepal is UTC+5:45) | |
779 | */ | |
780 | if (min < 60 && hour < 24) { | |
781 | int offset = hour * 60 + min; | |
782 | if (*date == '-') | |
783 | offset = -offset; | |
784 | *offp = offset; | |
785 | } | |
786 | return end - date; | |
787 | } | |
788 | ||
789 | static void date_string(timestamp_t date, int offset, struct strbuf *buf) | |
790 | { | |
791 | int sign = '+'; | |
792 | ||
793 | if (offset < 0) { | |
794 | offset = -offset; | |
795 | sign = '-'; | |
796 | } | |
797 | strbuf_addf(buf, "%"PRItime" %c%02d%02d", date, sign, offset / 60, offset % 60); | |
798 | } | |
799 | ||
800 | /* | |
801 | * Parse a string like "0 +0000" as ancient timestamp near epoch, but | |
802 | * only when it appears not as part of any other string. | |
803 | */ | |
804 | static int match_object_header_date(const char *date, timestamp_t *timestamp, int *offset) | |
805 | { | |
806 | char *end; | |
807 | timestamp_t stamp; | |
808 | int ofs; | |
809 | ||
810 | if (*date < '0' || '9' < *date) | |
811 | return -1; | |
812 | stamp = parse_timestamp(date, &end, 10); | |
813 | if (*end != ' ' || stamp == TIME_MAX || (end[1] != '+' && end[1] != '-')) | |
814 | return -1; | |
815 | date = end + 2; | |
816 | ofs = strtol(date, &end, 10); | |
817 | if ((*end != '\0' && (*end != '\n')) || end != date + 4) | |
818 | return -1; | |
819 | ofs = (ofs / 100) * 60 + (ofs % 100); | |
820 | if (date[-1] == '-') | |
821 | ofs = -ofs; | |
822 | *timestamp = stamp; | |
823 | *offset = ofs; | |
824 | return 0; | |
825 | } | |
826 | ||
827 | /* Gr. strptime is crap for this; it doesn't have a way to require RFC2822 | |
828 | (i.e. English) day/month names, and it doesn't work correctly with %z. */ | |
829 | int parse_date_basic(const char *date, timestamp_t *timestamp, int *offset) | |
830 | { | |
831 | struct tm tm; | |
832 | int tm_gmt; | |
833 | timestamp_t dummy_timestamp; | |
834 | int dummy_offset; | |
835 | ||
836 | if (!timestamp) | |
837 | timestamp = &dummy_timestamp; | |
838 | if (!offset) | |
839 | offset = &dummy_offset; | |
840 | ||
841 | memset(&tm, 0, sizeof(tm)); | |
842 | tm.tm_year = -1; | |
843 | tm.tm_mon = -1; | |
844 | tm.tm_mday = -1; | |
845 | tm.tm_isdst = -1; | |
846 | tm.tm_hour = -1; | |
847 | tm.tm_min = -1; | |
848 | tm.tm_sec = -1; | |
849 | *offset = -1; | |
850 | tm_gmt = 0; | |
851 | ||
852 | if (*date == '@' && | |
853 | !match_object_header_date(date + 1, timestamp, offset)) | |
854 | return 0; /* success */ | |
855 | for (;;) { | |
856 | int match = 0; | |
857 | unsigned char c = *date; | |
858 | ||
859 | /* Stop at end of string or newline */ | |
860 | if (!c || c == '\n') | |
861 | break; | |
862 | ||
863 | if (isalpha(c)) | |
864 | match = match_alpha(date, &tm, offset); | |
865 | else if (isdigit(c)) | |
866 | match = match_digit(date, &tm, offset, &tm_gmt); | |
867 | else if ((c == '-' || c == '+') && isdigit(date[1])) | |
868 | match = match_tz(date, offset); | |
869 | ||
870 | if (!match) { | |
871 | /* BAD CRAP */ | |
872 | match = 1; | |
873 | } | |
874 | ||
875 | date += match; | |
876 | } | |
877 | ||
878 | /* do not use mktime(), which uses local timezone, here */ | |
879 | *timestamp = tm_to_time_t(&tm); | |
880 | if (*timestamp == -1) | |
881 | return -1; | |
882 | ||
883 | if (*offset == -1) { | |
884 | time_t temp_time; | |
885 | ||
886 | /* gmtime_r() in match_digit() may have clobbered it */ | |
887 | tm.tm_isdst = -1; | |
888 | temp_time = mktime(&tm); | |
889 | if ((time_t)*timestamp > temp_time) { | |
890 | *offset = ((time_t)*timestamp - temp_time) / 60; | |
891 | } else { | |
892 | *offset = -(int)((temp_time - (time_t)*timestamp) / 60); | |
893 | } | |
894 | } | |
895 | ||
896 | if (!tm_gmt) | |
897 | *timestamp -= *offset * 60; | |
898 | return 0; /* success */ | |
899 | } | |
900 | ||
901 | int parse_expiry_date(const char *date, timestamp_t *timestamp) | |
902 | { | |
903 | int errors = 0; | |
904 | ||
905 | if (!strcmp(date, "never") || !strcmp(date, "false")) | |
906 | *timestamp = 0; | |
907 | else if (!strcmp(date, "all") || !strcmp(date, "now")) | |
908 | /* | |
909 | * We take over "now" here, which usually translates | |
910 | * to the current timestamp. This is because the user | |
911 | * really means to expire everything she has done in | |
912 | * the past, and by definition reflogs are the record | |
913 | * of the past, and there is nothing from the future | |
914 | * to be kept. | |
915 | */ | |
916 | *timestamp = TIME_MAX; | |
917 | else | |
918 | *timestamp = approxidate_careful(date, &errors); | |
919 | ||
920 | return errors; | |
921 | } | |
922 | ||
923 | int parse_date(const char *date, struct strbuf *result) | |
924 | { | |
925 | timestamp_t timestamp; | |
926 | int offset; | |
927 | if (parse_date_basic(date, ×tamp, &offset)) | |
928 | return -1; | |
929 | date_string(timestamp, offset, result); | |
930 | return 0; | |
931 | } | |
932 | ||
933 | static enum date_mode_type parse_date_type(const char *format, const char **end) | |
934 | { | |
935 | if (skip_prefix(format, "relative", end)) | |
936 | return DATE_RELATIVE; | |
937 | if (skip_prefix(format, "iso8601-strict", end) || | |
938 | skip_prefix(format, "iso-strict", end)) | |
939 | return DATE_ISO8601_STRICT; | |
940 | if (skip_prefix(format, "iso8601", end) || | |
941 | skip_prefix(format, "iso", end)) | |
942 | return DATE_ISO8601; | |
943 | if (skip_prefix(format, "rfc2822", end) || | |
944 | skip_prefix(format, "rfc", end)) | |
945 | return DATE_RFC2822; | |
946 | if (skip_prefix(format, "short", end)) | |
947 | return DATE_SHORT; | |
948 | if (skip_prefix(format, "default", end)) | |
949 | return DATE_NORMAL; | |
950 | if (skip_prefix(format, "human", end)) | |
951 | return DATE_HUMAN; | |
952 | if (skip_prefix(format, "raw", end)) | |
953 | return DATE_RAW; | |
954 | if (skip_prefix(format, "unix", end)) | |
955 | return DATE_UNIX; | |
956 | if (skip_prefix(format, "format", end)) | |
957 | return DATE_STRFTIME; | |
958 | /* | |
959 | * Please update $__git_log_date_formats in | |
960 | * git-completion.bash when you add new formats. | |
961 | */ | |
962 | ||
963 | die("unknown date format %s", format); | |
964 | } | |
965 | ||
966 | void parse_date_format(const char *format, struct date_mode *mode) | |
967 | { | |
968 | const char *p; | |
969 | ||
970 | /* "auto:foo" is "if tty/pager, then foo, otherwise normal" */ | |
971 | if (skip_prefix(format, "auto:", &p)) { | |
972 | if (isatty(1) || pager_in_use()) | |
973 | format = p; | |
974 | else | |
975 | format = "default"; | |
976 | } | |
977 | ||
978 | /* historical alias */ | |
979 | if (!strcmp(format, "local")) | |
980 | format = "default-local"; | |
981 | ||
982 | mode->type = parse_date_type(format, &p); | |
983 | mode->local = 0; | |
984 | ||
985 | if (skip_prefix(p, "-local", &p)) | |
986 | mode->local = 1; | |
987 | ||
988 | if (mode->type == DATE_STRFTIME) { | |
989 | if (!skip_prefix(p, ":", &p)) | |
990 | die("date format missing colon separator: %s", format); | |
991 | mode->strftime_fmt = xstrdup(p); | |
992 | } else if (*p) | |
993 | die("unknown date format %s", format); | |
994 | } | |
995 | ||
996 | void datestamp(struct strbuf *out) | |
997 | { | |
998 | time_t now; | |
999 | int offset; | |
1000 | struct tm tm = { 0 }; | |
1001 | ||
1002 | time(&now); | |
1003 | ||
1004 | offset = tm_to_time_t(localtime_r(&now, &tm)) - now; | |
1005 | offset /= 60; | |
1006 | ||
1007 | date_string(now, offset, out); | |
1008 | } | |
1009 | ||
1010 | /* | |
1011 | * Relative time update (eg "2 days ago"). If we haven't set the time | |
1012 | * yet, we need to set it from current time. | |
1013 | */ | |
1014 | static time_t update_tm(struct tm *tm, struct tm *now, time_t sec) | |
1015 | { | |
1016 | time_t n; | |
1017 | ||
1018 | if (tm->tm_mday < 0) | |
1019 | tm->tm_mday = now->tm_mday; | |
1020 | if (tm->tm_mon < 0) | |
1021 | tm->tm_mon = now->tm_mon; | |
1022 | if (tm->tm_year < 0) { | |
1023 | tm->tm_year = now->tm_year; | |
1024 | if (tm->tm_mon > now->tm_mon) | |
1025 | tm->tm_year--; | |
1026 | } | |
1027 | ||
1028 | n = mktime(tm) - sec; | |
1029 | localtime_r(&n, tm); | |
1030 | return n; | |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * Do we have a pending number at the end, or when | |
1035 | * we see a new one? Let's assume it's a month day, | |
1036 | * as in "Dec 6, 1992" | |
1037 | */ | |
1038 | static void pending_number(struct tm *tm, int *num) | |
1039 | { | |
1040 | int number = *num; | |
1041 | ||
1042 | if (number) { | |
1043 | *num = 0; | |
1044 | if (tm->tm_mday < 0 && number < 32) | |
1045 | tm->tm_mday = number; | |
1046 | else if (tm->tm_mon < 0 && number < 13) | |
1047 | tm->tm_mon = number-1; | |
1048 | else if (tm->tm_year < 0) { | |
1049 | if (number > 1969 && number < 2100) | |
1050 | tm->tm_year = number - 1900; | |
1051 | else if (number > 69 && number < 100) | |
1052 | tm->tm_year = number; | |
1053 | else if (number < 38) | |
1054 | tm->tm_year = 100 + number; | |
1055 | /* We screw up for number = 00 ? */ | |
1056 | } | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | static void date_now(struct tm *tm, struct tm *now, int *num) | |
1061 | { | |
1062 | *num = 0; | |
1063 | update_tm(tm, now, 0); | |
1064 | } | |
1065 | ||
1066 | static void date_yesterday(struct tm *tm, struct tm *now, int *num) | |
1067 | { | |
1068 | *num = 0; | |
1069 | update_tm(tm, now, 24*60*60); | |
1070 | } | |
1071 | ||
1072 | static void date_time(struct tm *tm, struct tm *now, int hour) | |
1073 | { | |
1074 | if (tm->tm_hour < hour) | |
1075 | update_tm(tm, now, 24*60*60); | |
1076 | tm->tm_hour = hour; | |
1077 | tm->tm_min = 0; | |
1078 | tm->tm_sec = 0; | |
1079 | } | |
1080 | ||
1081 | static void date_midnight(struct tm *tm, struct tm *now, int *num) | |
1082 | { | |
1083 | pending_number(tm, num); | |
1084 | date_time(tm, now, 0); | |
1085 | } | |
1086 | ||
1087 | static void date_noon(struct tm *tm, struct tm *now, int *num) | |
1088 | { | |
1089 | pending_number(tm, num); | |
1090 | date_time(tm, now, 12); | |
1091 | } | |
1092 | ||
1093 | static void date_tea(struct tm *tm, struct tm *now, int *num) | |
1094 | { | |
1095 | pending_number(tm, num); | |
1096 | date_time(tm, now, 17); | |
1097 | } | |
1098 | ||
1099 | static void date_pm(struct tm *tm, struct tm *now, int *num) | |
1100 | { | |
1101 | int hour, n = *num; | |
1102 | *num = 0; | |
1103 | ||
1104 | hour = tm->tm_hour; | |
1105 | if (n) { | |
1106 | hour = n; | |
1107 | tm->tm_min = 0; | |
1108 | tm->tm_sec = 0; | |
1109 | } | |
1110 | tm->tm_hour = (hour % 12) + 12; | |
1111 | } | |
1112 | ||
1113 | static void date_am(struct tm *tm, struct tm *now, int *num) | |
1114 | { | |
1115 | int hour, n = *num; | |
1116 | *num = 0; | |
1117 | ||
1118 | hour = tm->tm_hour; | |
1119 | if (n) { | |
1120 | hour = n; | |
1121 | tm->tm_min = 0; | |
1122 | tm->tm_sec = 0; | |
1123 | } | |
1124 | tm->tm_hour = (hour % 12); | |
1125 | } | |
1126 | ||
1127 | static void date_never(struct tm *tm, struct tm *now, int *num) | |
1128 | { | |
1129 | time_t n = 0; | |
1130 | localtime_r(&n, tm); | |
1131 | *num = 0; | |
1132 | } | |
1133 | ||
1134 | static const struct special { | |
1135 | const char *name; | |
1136 | void (*fn)(struct tm *, struct tm *, int *); | |
1137 | } special[] = { | |
1138 | { "yesterday", date_yesterday }, | |
1139 | { "noon", date_noon }, | |
1140 | { "midnight", date_midnight }, | |
1141 | { "tea", date_tea }, | |
1142 | { "PM", date_pm }, | |
1143 | { "AM", date_am }, | |
1144 | { "never", date_never }, | |
1145 | { "now", date_now }, | |
1146 | { NULL } | |
1147 | }; | |
1148 | ||
1149 | static const char *number_name[] = { | |
1150 | "zero", "one", "two", "three", "four", | |
1151 | "five", "six", "seven", "eight", "nine", "ten", | |
1152 | }; | |
1153 | ||
1154 | static const struct typelen { | |
1155 | const char *type; | |
1156 | int length; | |
1157 | } typelen[] = { | |
1158 | { "seconds", 1 }, | |
1159 | { "minutes", 60 }, | |
1160 | { "hours", 60*60 }, | |
1161 | { "days", 24*60*60 }, | |
1162 | { "weeks", 7*24*60*60 }, | |
1163 | { NULL } | |
1164 | }; | |
1165 | ||
1166 | static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm *now, int *num, int *touched) | |
1167 | { | |
1168 | const struct typelen *tl; | |
1169 | const struct special *s; | |
1170 | const char *end = date; | |
1171 | int i; | |
1172 | ||
1173 | while (isalpha(*++end)) | |
1174 | ; | |
1175 | ||
1176 | for (i = 0; i < 12; i++) { | |
1177 | int match = match_string(date, month_names[i]); | |
1178 | if (match >= 3) { | |
1179 | tm->tm_mon = i; | |
1180 | *touched = 1; | |
1181 | return end; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | for (s = special; s->name; s++) { | |
1186 | int len = strlen(s->name); | |
1187 | if (match_string(date, s->name) == len) { | |
1188 | s->fn(tm, now, num); | |
1189 | *touched = 1; | |
1190 | return end; | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | if (!*num) { | |
1195 | for (i = 1; i < 11; i++) { | |
1196 | int len = strlen(number_name[i]); | |
1197 | if (match_string(date, number_name[i]) == len) { | |
1198 | *num = i; | |
1199 | *touched = 1; | |
1200 | return end; | |
1201 | } | |
1202 | } | |
1203 | if (match_string(date, "last") == 4) { | |
1204 | *num = 1; | |
1205 | *touched = 1; | |
1206 | } | |
1207 | return end; | |
1208 | } | |
1209 | ||
1210 | tl = typelen; | |
1211 | while (tl->type) { | |
1212 | int len = strlen(tl->type); | |
1213 | if (match_string(date, tl->type) >= len-1) { | |
1214 | update_tm(tm, now, tl->length * *num); | |
1215 | *num = 0; | |
1216 | *touched = 1; | |
1217 | return end; | |
1218 | } | |
1219 | tl++; | |
1220 | } | |
1221 | ||
1222 | for (i = 0; i < 7; i++) { | |
1223 | int match = match_string(date, weekday_names[i]); | |
1224 | if (match >= 3) { | |
1225 | int diff, n = *num -1; | |
1226 | *num = 0; | |
1227 | ||
1228 | diff = tm->tm_wday - i; | |
1229 | if (diff <= 0) | |
1230 | n++; | |
1231 | diff += 7*n; | |
1232 | ||
1233 | update_tm(tm, now, diff * 24 * 60 * 60); | |
1234 | *touched = 1; | |
1235 | return end; | |
1236 | } | |
1237 | } | |
1238 | ||
1239 | if (match_string(date, "months") >= 5) { | |
1240 | int n; | |
1241 | update_tm(tm, now, 0); /* fill in date fields if needed */ | |
1242 | n = tm->tm_mon - *num; | |
1243 | *num = 0; | |
1244 | while (n < 0) { | |
1245 | n += 12; | |
1246 | tm->tm_year--; | |
1247 | } | |
1248 | tm->tm_mon = n; | |
1249 | *touched = 1; | |
1250 | return end; | |
1251 | } | |
1252 | ||
1253 | if (match_string(date, "years") >= 4) { | |
1254 | update_tm(tm, now, 0); /* fill in date fields if needed */ | |
1255 | tm->tm_year -= *num; | |
1256 | *num = 0; | |
1257 | *touched = 1; | |
1258 | return end; | |
1259 | } | |
1260 | ||
1261 | return end; | |
1262 | } | |
1263 | ||
1264 | static const char *approxidate_digit(const char *date, struct tm *tm, int *num, | |
1265 | time_t now) | |
1266 | { | |
1267 | char *end; | |
1268 | timestamp_t number = parse_timestamp(date, &end, 10); | |
1269 | ||
1270 | switch (*end) { | |
1271 | case ':': | |
1272 | case '.': | |
1273 | case '/': | |
1274 | case '-': | |
1275 | if (isdigit(end[1])) { | |
1276 | int match = match_multi_number(number, *end, date, end, | |
1277 | tm, now); | |
1278 | if (match) | |
1279 | return date + match; | |
1280 | } | |
1281 | } | |
1282 | ||
1283 | /* Accept zero-padding only for small numbers ("Dec 02", never "Dec 0002") */ | |
1284 | if (date[0] != '0' || end - date <= 2) | |
1285 | *num = number; | |
1286 | return end; | |
1287 | } | |
1288 | ||
1289 | static timestamp_t approxidate_str(const char *date, | |
1290 | const struct timeval *tv, | |
1291 | int *error_ret) | |
1292 | { | |
1293 | int number = 0; | |
1294 | int touched = 0; | |
1295 | struct tm tm, now; | |
1296 | time_t time_sec; | |
1297 | ||
1298 | time_sec = tv->tv_sec; | |
1299 | localtime_r(&time_sec, &tm); | |
1300 | now = tm; | |
1301 | ||
1302 | tm.tm_year = -1; | |
1303 | tm.tm_mon = -1; | |
1304 | tm.tm_mday = -1; | |
1305 | ||
1306 | for (;;) { | |
1307 | unsigned char c = *date; | |
1308 | if (!c) | |
1309 | break; | |
1310 | date++; | |
1311 | if (isdigit(c)) { | |
1312 | pending_number(&tm, &number); | |
1313 | date = approxidate_digit(date-1, &tm, &number, time_sec); | |
1314 | touched = 1; | |
1315 | continue; | |
1316 | } | |
1317 | if (isalpha(c)) | |
1318 | date = approxidate_alpha(date-1, &tm, &now, &number, &touched); | |
1319 | } | |
1320 | pending_number(&tm, &number); | |
1321 | if (!touched) | |
1322 | *error_ret = 1; | |
1323 | return (timestamp_t)update_tm(&tm, &now, 0); | |
1324 | } | |
1325 | ||
1326 | timestamp_t approxidate_relative(const char *date) | |
1327 | { | |
1328 | struct timeval tv; | |
1329 | timestamp_t timestamp; | |
1330 | int offset; | |
1331 | int errors = 0; | |
1332 | ||
1333 | if (!parse_date_basic(date, ×tamp, &offset)) | |
1334 | return timestamp; | |
1335 | ||
1336 | get_time(&tv); | |
1337 | return approxidate_str(date, (const struct timeval *) &tv, &errors); | |
1338 | } | |
1339 | ||
1340 | timestamp_t approxidate_careful(const char *date, int *error_ret) | |
1341 | { | |
1342 | struct timeval tv; | |
1343 | timestamp_t timestamp; | |
1344 | int offset; | |
1345 | int dummy = 0; | |
1346 | if (!error_ret) | |
1347 | error_ret = &dummy; | |
1348 | ||
1349 | if (!parse_date_basic(date, ×tamp, &offset)) { | |
1350 | *error_ret = 0; | |
1351 | return timestamp; | |
1352 | } | |
1353 | ||
1354 | get_time(&tv); | |
1355 | return approxidate_str(date, &tv, error_ret); | |
1356 | } | |
1357 | ||
1358 | int date_overflows(timestamp_t t) | |
1359 | { | |
1360 | time_t sys; | |
1361 | ||
1362 | /* If we overflowed our timestamp data type, that's bad... */ | |
1363 | if ((uintmax_t)t >= TIME_MAX) | |
1364 | return 1; | |
1365 | ||
1366 | /* | |
1367 | * ...but we also are going to feed the result to system | |
1368 | * functions that expect time_t, which is often "signed long". | |
1369 | * Make sure that we fit into time_t, as well. | |
1370 | */ | |
1371 | sys = t; | |
1372 | return t != sys || (t < 1) != (sys < 1); | |
1373 | } |