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Commit | Line | Data |
---|---|---|
ecee9d9e ET |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
6 | ||
5e3f94df | 7 | #include "git-compat-util.h" |
88c7b4c3 | 8 | #include "date.h" |
f394e093 | 9 | #include "gettext.h" |
ca4eed70 | 10 | #include "pager.h" |
69a63fe6 | 11 | #include "strbuf.h" |
e99d59ff | 12 | |
bb5799d6 JS |
13 | /* |
14 | * This is like mktime, but without normalization of tm_wday and tm_yday. | |
15 | */ | |
9b591b94 | 16 | time_t tm_to_time_t(const struct tm *tm) |
ecee9d9e ET |
17 | { |
18 | static const int mdays[] = { | |
19 | 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 | |
20 | }; | |
21 | int year = tm->tm_year - 70; | |
22 | int month = tm->tm_mon; | |
23 | int day = tm->tm_mday; | |
24 | ||
25 | if (year < 0 || year > 129) /* algo only works for 1970-2099 */ | |
26 | return -1; | |
27 | if (month < 0 || month > 11) /* array bounds */ | |
28 | return -1; | |
29 | if (month < 2 || (year + 2) % 4) | |
30 | day--; | |
36e4986f LT |
31 | if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_sec < 0) |
32 | return -1; | |
ecee9d9e ET |
33 | return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24*60*60UL + |
34 | tm->tm_hour * 60*60 + tm->tm_min * 60 + tm->tm_sec; | |
35 | } | |
36 | ||
37 | static const char *month_names[] = { | |
89967023 LT |
38 | "January", "February", "March", "April", "May", "June", |
39 | "July", "August", "September", "October", "November", "December" | |
ecee9d9e ET |
40 | }; |
41 | ||
42 | static const char *weekday_names[] = { | |
6b7b0427 | 43 | "Sundays", "Mondays", "Tuesdays", "Wednesdays", "Thursdays", "Fridays", "Saturdays" |
ecee9d9e ET |
44 | }; |
45 | ||
dddbad72 | 46 | static time_t gm_time_t(timestamp_t time, int tz) |
9a8e35e9 LT |
47 | { |
48 | int minutes; | |
49 | ||
50 | minutes = tz < 0 ? -tz : tz; | |
51 | minutes = (minutes / 100)*60 + (minutes % 100); | |
52 | minutes = tz < 0 ? -minutes : minutes; | |
1e65a982 JS |
53 | |
54 | if (minutes > 0) { | |
55 | if (unsigned_add_overflows(time, minutes * 60)) | |
56 | die("Timestamp+tz too large: %"PRItime" +%04d", | |
57 | time, tz); | |
58 | } else if (time < -minutes * 60) | |
59 | die("Timestamp before Unix epoch: %"PRItime" %04d", time, tz); | |
60 | time += minutes * 60; | |
61 | if (date_overflows(time)) | |
62 | die("Timestamp too large for this system: %"PRItime, time); | |
63 | return (time_t)time; | |
9a8e35e9 LT |
64 | } |
65 | ||
f80cd783 LT |
66 | /* |
67 | * The "tz" thing is passed in as this strange "decimal parse of tz" | |
68 | * thing, which means that tz -0100 is passed in as the integer -100, | |
69 | * even though it means "sixty minutes off" | |
70 | */ | |
ccd46945 | 71 | static struct tm *time_to_tm(timestamp_t time, int tz, struct tm *tm) |
f80cd783 | 72 | { |
9a8e35e9 | 73 | time_t t = gm_time_t(time, tz); |
ccd46945 | 74 | return gmtime_r(&t, tm); |
2a387043 JH |
75 | } |
76 | ||
ccd46945 | 77 | static struct tm *time_to_tm_local(timestamp_t time, struct tm *tm) |
6eced3ec JK |
78 | { |
79 | time_t t = time; | |
ccd46945 | 80 | return localtime_r(&t, tm); |
6eced3ec JK |
81 | } |
82 | ||
a7b02ccf | 83 | /* |
acdd3776 LT |
84 | * Fill in the localtime 'struct tm' for the supplied time, |
85 | * and return the local tz. | |
a7b02ccf | 86 | */ |
acdd3776 | 87 | static int local_time_tzoffset(time_t t, struct tm *tm) |
a7b02ccf | 88 | { |
acdd3776 | 89 | time_t t_local; |
a7b02ccf JH |
90 | int offset, eastwest; |
91 | ||
acdd3776 LT |
92 | localtime_r(&t, tm); |
93 | t_local = tm_to_time_t(tm); | |
bab74837 JK |
94 | if (t_local == -1) |
95 | return 0; /* error; just use +0000 */ | |
a7b02ccf JH |
96 | if (t_local < t) { |
97 | eastwest = -1; | |
98 | offset = t - t_local; | |
99 | } else { | |
100 | eastwest = 1; | |
101 | offset = t_local - t; | |
102 | } | |
103 | offset /= 60; /* in minutes */ | |
104 | offset = (offset % 60) + ((offset / 60) * 100); | |
105 | return offset * eastwest; | |
106 | } | |
107 | ||
acdd3776 LT |
108 | /* |
109 | * What value of "tz" was in effect back then at "time" in the | |
110 | * local timezone? | |
111 | */ | |
112 | static int local_tzoffset(timestamp_t time) | |
113 | { | |
114 | struct tm tm; | |
115 | ||
116 | if (date_overflows(time)) | |
117 | die("Timestamp too large for this system: %"PRItime, time); | |
118 | ||
119 | return local_time_tzoffset((time_t)time, &tm); | |
120 | } | |
121 | ||
b841d4ff SS |
122 | static void get_time(struct timeval *now) |
123 | { | |
124 | const char *x; | |
125 | ||
126 | x = getenv("GIT_TEST_DATE_NOW"); | |
127 | if (x) { | |
128 | now->tv_sec = atoi(x); | |
129 | now->tv_usec = 0; | |
130 | } | |
131 | else | |
132 | gettimeofday(now, NULL); | |
133 | } | |
134 | ||
29f4332e | 135 | void show_date_relative(timestamp_t time, struct strbuf *timebuf) |
33012fc4 | 136 | { |
29f4332e | 137 | struct timeval now; |
dddbad72 | 138 | timestamp_t diff; |
29f4332e SS |
139 | |
140 | get_time(&now); | |
141 | if (now.tv_sec < time) { | |
7d29afd4 JN |
142 | strbuf_addstr(timebuf, _("in the future")); |
143 | return; | |
144 | } | |
29f4332e | 145 | diff = now.tv_sec - time; |
33012fc4 | 146 | if (diff < 90) { |
7d29afd4 | 147 | strbuf_addf(timebuf, |
cb71f8bd | 148 | Q_("%"PRItime" second ago", "%"PRItime" seconds ago", diff), diff); |
7d29afd4 | 149 | return; |
33012fc4 AR |
150 | } |
151 | /* Turn it into minutes */ | |
152 | diff = (diff + 30) / 60; | |
153 | if (diff < 90) { | |
7d29afd4 | 154 | strbuf_addf(timebuf, |
cb71f8bd | 155 | Q_("%"PRItime" minute ago", "%"PRItime" minutes ago", diff), diff); |
7d29afd4 | 156 | return; |
33012fc4 AR |
157 | } |
158 | /* Turn it into hours */ | |
159 | diff = (diff + 30) / 60; | |
160 | if (diff < 36) { | |
7d29afd4 | 161 | strbuf_addf(timebuf, |
cb71f8bd | 162 | Q_("%"PRItime" hour ago", "%"PRItime" hours ago", diff), diff); |
7d29afd4 | 163 | return; |
33012fc4 AR |
164 | } |
165 | /* We deal with number of days from here on */ | |
166 | diff = (diff + 12) / 24; | |
167 | if (diff < 14) { | |
7d29afd4 | 168 | strbuf_addf(timebuf, |
cb71f8bd | 169 | Q_("%"PRItime" day ago", "%"PRItime" days ago", diff), diff); |
7d29afd4 | 170 | return; |
33012fc4 AR |
171 | } |
172 | /* Say weeks for the past 10 weeks or so */ | |
173 | if (diff < 70) { | |
7d29afd4 | 174 | strbuf_addf(timebuf, |
cb71f8bd | 175 | Q_("%"PRItime" week ago", "%"PRItime" weeks ago", (diff + 3) / 7), |
7d29afd4 JN |
176 | (diff + 3) / 7); |
177 | return; | |
33012fc4 AR |
178 | } |
179 | /* Say months for the past 12 months or so */ | |
dbc1b1f7 | 180 | if (diff < 365) { |
7d29afd4 | 181 | strbuf_addf(timebuf, |
cb71f8bd | 182 | Q_("%"PRItime" month ago", "%"PRItime" months ago", (diff + 15) / 30), |
7d29afd4 JN |
183 | (diff + 15) / 30); |
184 | return; | |
33012fc4 AR |
185 | } |
186 | /* Give years and months for 5 years or so */ | |
187 | if (diff < 1825) { | |
dddbad72 JS |
188 | timestamp_t totalmonths = (diff * 12 * 2 + 365) / (365 * 2); |
189 | timestamp_t years = totalmonths / 12; | |
190 | timestamp_t months = totalmonths % 12; | |
7d29afd4 JN |
191 | if (months) { |
192 | struct strbuf sb = STRBUF_INIT; | |
cb71f8bd | 193 | strbuf_addf(&sb, Q_("%"PRItime" year", "%"PRItime" years", years), years); |
7d29afd4 | 194 | strbuf_addf(timebuf, |
fcaed04d | 195 | /* TRANSLATORS: "%s" is "<n> years" */ |
cb71f8bd | 196 | Q_("%s, %"PRItime" month ago", "%s, %"PRItime" months ago", months), |
7d29afd4 JN |
197 | sb.buf, months); |
198 | strbuf_release(&sb); | |
199 | } else | |
200 | strbuf_addf(timebuf, | |
cb71f8bd | 201 | Q_("%"PRItime" year ago", "%"PRItime" years ago", years), years); |
7d29afd4 | 202 | return; |
33012fc4 AR |
203 | } |
204 | /* Otherwise, just years. Centuries is probably overkill. */ | |
7d29afd4 | 205 | strbuf_addf(timebuf, |
cb71f8bd | 206 | Q_("%"PRItime" year ago", "%"PRItime" years ago", (diff + 183) / 365), |
7d29afd4 | 207 | (diff + 183) / 365); |
33012fc4 AR |
208 | } |
209 | ||
a5481a6c JK |
210 | struct date_mode *date_mode_from_type(enum date_mode_type type) |
211 | { | |
f1842898 | 212 | static struct date_mode mode = DATE_MODE_INIT; |
aa1462cc | 213 | if (type == DATE_STRFTIME) |
033abf97 | 214 | BUG("cannot create anonymous strftime date_mode struct"); |
a5481a6c JK |
215 | mode.type = type; |
216 | return &mode; | |
217 | } | |
218 | ||
acdd3776 LT |
219 | 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) |
220 | { | |
221 | struct { | |
222 | unsigned int year:1, | |
223 | date:1, | |
224 | wday:1, | |
225 | time:1, | |
226 | seconds:1, | |
227 | tz:1; | |
228 | } hide = { 0 }; | |
229 | ||
230 | hide.tz = local || tz == human_tz; | |
231 | hide.year = tm->tm_year == human_tm->tm_year; | |
232 | if (hide.year) { | |
233 | if (tm->tm_mon == human_tm->tm_mon) { | |
234 | if (tm->tm_mday > human_tm->tm_mday) { | |
235 | /* Future date: think timezones */ | |
236 | } else if (tm->tm_mday == human_tm->tm_mday) { | |
237 | hide.date = hide.wday = 1; | |
238 | } else if (tm->tm_mday + 5 > human_tm->tm_mday) { | |
239 | /* Leave just weekday if it was a few days ago */ | |
240 | hide.date = 1; | |
241 | } | |
242 | } | |
243 | } | |
244 | ||
245 | /* Show "today" times as just relative times */ | |
246 | if (hide.wday) { | |
29f4332e | 247 | show_date_relative(time, buf); |
acdd3776 LT |
248 | return; |
249 | } | |
250 | ||
251 | /* | |
252 | * Always hide seconds for human-readable. | |
253 | * Hide timezone if showing date. | |
254 | * Hide weekday and time if showing year. | |
255 | * | |
256 | * The logic here is two-fold: | |
257 | * (a) only show details when recent enough to matter | |
258 | * (b) keep the maximum length "similar", and in check | |
259 | */ | |
260 | if (human_tm->tm_year) { | |
261 | hide.seconds = 1; | |
262 | hide.tz |= !hide.date; | |
263 | hide.wday = hide.time = !hide.year; | |
264 | } | |
265 | ||
266 | if (!hide.wday) | |
267 | strbuf_addf(buf, "%.3s ", weekday_names[tm->tm_wday]); | |
268 | if (!hide.date) | |
269 | strbuf_addf(buf, "%.3s %d ", month_names[tm->tm_mon], tm->tm_mday); | |
270 | ||
271 | /* Do we want AM/PM depending on locale? */ | |
272 | if (!hide.time) { | |
273 | strbuf_addf(buf, "%02d:%02d", tm->tm_hour, tm->tm_min); | |
274 | if (!hide.seconds) | |
275 | strbuf_addf(buf, ":%02d", tm->tm_sec); | |
276 | } else | |
277 | strbuf_rtrim(buf); | |
278 | ||
279 | if (!hide.year) | |
280 | strbuf_addf(buf, " %d", tm->tm_year + 1900); | |
281 | ||
282 | if (!hide.tz) | |
283 | strbuf_addf(buf, " %+05d", tz); | |
284 | } | |
285 | ||
dddbad72 | 286 | const char *show_date(timestamp_t time, int tz, const struct date_mode *mode) |
2a387043 JH |
287 | { |
288 | struct tm *tm; | |
ccd46945 | 289 | struct tm tmbuf = { 0 }; |
acdd3776 LT |
290 | struct tm human_tm = { 0 }; |
291 | int human_tz = -1; | |
7d29afd4 | 292 | static struct strbuf timebuf = STRBUF_INIT; |
2a387043 | 293 | |
642833db JK |
294 | if (mode->type == DATE_UNIX) { |
295 | strbuf_reset(&timebuf); | |
cb71f8bd | 296 | strbuf_addf(&timebuf, "%"PRItime, time); |
642833db JK |
297 | return timebuf.buf; |
298 | } | |
299 | ||
acdd3776 LT |
300 | if (mode->type == DATE_HUMAN) { |
301 | struct timeval now; | |
302 | ||
b841d4ff | 303 | get_time(&now); |
acdd3776 LT |
304 | |
305 | /* Fill in the data for "current time" in human_tz and human_tm */ | |
306 | human_tz = local_time_tzoffset(now.tv_sec, &human_tm); | |
307 | } | |
308 | ||
add00ba2 | 309 | if (mode->local) |
dc6d782c JK |
310 | tz = local_tzoffset(time); |
311 | ||
a5481a6c | 312 | if (mode->type == DATE_RAW) { |
7d29afd4 | 313 | strbuf_reset(&timebuf); |
cb71f8bd | 314 | strbuf_addf(&timebuf, "%"PRItime" %+05d", time, tz); |
7d29afd4 | 315 | return timebuf.buf; |
7dff9b30 LT |
316 | } |
317 | ||
a5481a6c | 318 | if (mode->type == DATE_RELATIVE) { |
7d29afd4 | 319 | strbuf_reset(&timebuf); |
29f4332e | 320 | show_date_relative(time, &timebuf); |
7d29afd4 | 321 | return timebuf.buf; |
9a8e35e9 LT |
322 | } |
323 | ||
6eced3ec | 324 | if (mode->local) |
ccd46945 | 325 | tm = time_to_tm_local(time, &tmbuf); |
6eced3ec | 326 | else |
ccd46945 | 327 | tm = time_to_tm(time, tz, &tmbuf); |
2b15846d | 328 | if (!tm) { |
ccd46945 | 329 | tm = time_to_tm(0, 0, &tmbuf); |
2b15846d JK |
330 | tz = 0; |
331 | } | |
7d29afd4 JN |
332 | |
333 | strbuf_reset(&timebuf); | |
a5481a6c | 334 | if (mode->type == DATE_SHORT) |
7d29afd4 | 335 | strbuf_addf(&timebuf, "%04d-%02d-%02d", tm->tm_year + 1900, |
f8493ec0 | 336 | tm->tm_mon + 1, tm->tm_mday); |
a5481a6c | 337 | else if (mode->type == DATE_ISO8601) |
7d29afd4 | 338 | strbuf_addf(&timebuf, "%04d-%02d-%02d %02d:%02d:%02d %+05d", |
ee8f838e RR |
339 | tm->tm_year + 1900, |
340 | tm->tm_mon + 1, | |
341 | tm->tm_mday, | |
342 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
343 | tz); | |
a5481a6c | 344 | else if (mode->type == DATE_ISO8601_STRICT) { |
466fb674 BB |
345 | char sign = (tz >= 0) ? '+' : '-'; |
346 | tz = abs(tz); | |
347 | strbuf_addf(&timebuf, "%04d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d", | |
348 | tm->tm_year + 1900, | |
349 | tm->tm_mon + 1, | |
350 | tm->tm_mday, | |
351 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
352 | sign, tz / 100, tz % 100); | |
a5481a6c | 353 | } else if (mode->type == DATE_RFC2822) |
7d29afd4 | 354 | strbuf_addf(&timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d", |
73013afd JH |
355 | weekday_names[tm->tm_wday], tm->tm_mday, |
356 | month_names[tm->tm_mon], tm->tm_year + 1900, | |
357 | tm->tm_hour, tm->tm_min, tm->tm_sec, tz); | |
aa1462cc | 358 | else if (mode->type == DATE_STRFTIME) |
6eced3ec | 359 | strbuf_addftime(&timebuf, mode->strftime_fmt, tm, tz, |
3b702239 | 360 | !mode->local); |
f8493ec0 | 361 | else |
acdd3776 | 362 | show_date_normal(&timebuf, time, tm, tz, &human_tm, human_tz, mode->local); |
7d29afd4 | 363 | return timebuf.buf; |
f80cd783 LT |
364 | } |
365 | ||
89967023 LT |
366 | /* |
367 | * Check these. And note how it doesn't do the summer-time conversion. | |
368 | * | |
369 | * In my world, it's always summer, and things are probably a bit off | |
370 | * in other ways too. | |
371 | */ | |
372 | static const struct { | |
373 | const char *name; | |
374 | int offset; | |
5e2a78a4 | 375 | int dst; |
89967023 | 376 | } timezone_names[] = { |
5e2a78a4 LT |
377 | { "IDLW", -12, 0, }, /* International Date Line West */ |
378 | { "NT", -11, 0, }, /* Nome */ | |
379 | { "CAT", -10, 0, }, /* Central Alaska */ | |
380 | { "HST", -10, 0, }, /* Hawaii Standard */ | |
381 | { "HDT", -10, 1, }, /* Hawaii Daylight */ | |
382 | { "YST", -9, 0, }, /* Yukon Standard */ | |
383 | { "YDT", -9, 1, }, /* Yukon Daylight */ | |
384 | { "PST", -8, 0, }, /* Pacific Standard */ | |
385 | { "PDT", -8, 1, }, /* Pacific Daylight */ | |
386 | { "MST", -7, 0, }, /* Mountain Standard */ | |
387 | { "MDT", -7, 1, }, /* Mountain Daylight */ | |
388 | { "CST", -6, 0, }, /* Central Standard */ | |
389 | { "CDT", -6, 1, }, /* Central Daylight */ | |
390 | { "EST", -5, 0, }, /* Eastern Standard */ | |
391 | { "EDT", -5, 1, }, /* Eastern Daylight */ | |
392 | { "AST", -3, 0, }, /* Atlantic Standard */ | |
393 | { "ADT", -3, 1, }, /* Atlantic Daylight */ | |
394 | { "WAT", -1, 0, }, /* West Africa */ | |
395 | ||
396 | { "GMT", 0, 0, }, /* Greenwich Mean */ | |
397 | { "UTC", 0, 0, }, /* Universal (Coordinated) */ | |
75b37e70 | 398 | { "Z", 0, 0, }, /* Zulu, alias for UTC */ |
5e2a78a4 LT |
399 | |
400 | { "WET", 0, 0, }, /* Western European */ | |
401 | { "BST", 0, 1, }, /* British Summer */ | |
402 | { "CET", +1, 0, }, /* Central European */ | |
403 | { "MET", +1, 0, }, /* Middle European */ | |
404 | { "MEWT", +1, 0, }, /* Middle European Winter */ | |
405 | { "MEST", +1, 1, }, /* Middle European Summer */ | |
406 | { "CEST", +1, 1, }, /* Central European Summer */ | |
407 | { "MESZ", +1, 1, }, /* Middle European Summer */ | |
408 | { "FWT", +1, 0, }, /* French Winter */ | |
409 | { "FST", +1, 1, }, /* French Summer */ | |
410 | { "EET", +2, 0, }, /* Eastern Europe, USSR Zone 1 */ | |
92e2311b | 411 | { "EEST", +2, 1, }, /* Eastern European Daylight */ |
5e2a78a4 LT |
412 | { "WAST", +7, 0, }, /* West Australian Standard */ |
413 | { "WADT", +7, 1, }, /* West Australian Daylight */ | |
414 | { "CCT", +8, 0, }, /* China Coast, USSR Zone 7 */ | |
415 | { "JST", +9, 0, }, /* Japan Standard, USSR Zone 8 */ | |
416 | { "EAST", +10, 0, }, /* Eastern Australian Standard */ | |
417 | { "EADT", +10, 1, }, /* Eastern Australian Daylight */ | |
418 | { "GST", +10, 0, }, /* Guam Standard, USSR Zone 9 */ | |
695ed472 SD |
419 | { "NZT", +12, 0, }, /* New Zealand */ |
420 | { "NZST", +12, 0, }, /* New Zealand Standard */ | |
421 | { "NZDT", +12, 1, }, /* New Zealand Daylight */ | |
5e2a78a4 | 422 | { "IDLE", +12, 0, }, /* International Date Line East */ |
89967023 | 423 | }; |
ecee9d9e | 424 | |
89967023 | 425 | static int match_string(const char *date, const char *str) |
ecee9d9e | 426 | { |
89967023 LT |
427 | int i = 0; |
428 | ||
429 | for (i = 0; *date; date++, str++, i++) { | |
430 | if (*date == *str) | |
431 | continue; | |
432 | if (toupper(*date) == toupper(*str)) | |
433 | continue; | |
434 | if (!isalnum(*date)) | |
435 | break; | |
436 | return 0; | |
437 | } | |
438 | return i; | |
ecee9d9e ET |
439 | } |
440 | ||
68849b54 LT |
441 | static int skip_alpha(const char *date) |
442 | { | |
443 | int i = 0; | |
444 | do { | |
445 | i++; | |
446 | } while (isalpha(date[i])); | |
447 | return i; | |
448 | } | |
449 | ||
89967023 LT |
450 | /* |
451 | * Parse month, weekday, or timezone name | |
452 | */ | |
453 | static int match_alpha(const char *date, struct tm *tm, int *offset) | |
ecee9d9e | 454 | { |
89967023 | 455 | int i; |
ecee9d9e | 456 | |
89967023 LT |
457 | for (i = 0; i < 12; i++) { |
458 | int match = match_string(date, month_names[i]); | |
459 | if (match >= 3) { | |
460 | tm->tm_mon = i; | |
461 | return match; | |
ecee9d9e | 462 | } |
89967023 | 463 | } |
ecee9d9e | 464 | |
89967023 LT |
465 | for (i = 0; i < 7; i++) { |
466 | int match = match_string(date, weekday_names[i]); | |
467 | if (match >= 3) { | |
468 | tm->tm_wday = i; | |
469 | return match; | |
470 | } | |
471 | } | |
ecee9d9e | 472 | |
b4f2a6ac | 473 | for (i = 0; i < ARRAY_SIZE(timezone_names); i++) { |
89967023 | 474 | int match = match_string(date, timezone_names[i].name); |
75b37e70 | 475 | if (match >= 3 || match == strlen(timezone_names[i].name)) { |
5e2a78a4 LT |
476 | int off = timezone_names[i].offset; |
477 | ||
478 | /* This is bogus, but we like summer */ | |
479 | off += timezone_names[i].dst; | |
480 | ||
92e2311b LT |
481 | /* Only use the tz name offset if we don't have anything better */ |
482 | if (*offset == -1) | |
483 | *offset = 60*off; | |
484 | ||
89967023 | 485 | return match; |
ecee9d9e ET |
486 | } |
487 | } | |
ecee9d9e | 488 | |
68849b54 | 489 | if (match_string(date, "PM") == 2) { |
18b633ca LT |
490 | tm->tm_hour = (tm->tm_hour % 12) + 12; |
491 | return 2; | |
492 | } | |
493 | ||
494 | if (match_string(date, "AM") == 2) { | |
495 | tm->tm_hour = (tm->tm_hour % 12) + 0; | |
68849b54 LT |
496 | return 2; |
497 | } | |
498 | ||
b56be499 ĐTCD |
499 | /* ISO-8601 allows yyyymmDD'T'HHMMSS, with less precision */ |
500 | if (*date == 'T' && isdigit(date[1]) && tm->tm_hour == -1) { | |
501 | tm->tm_min = tm->tm_sec = 0; | |
502 | return 1; | |
503 | } | |
504 | ||
89967023 | 505 | /* BAD CRAP */ |
68849b54 | 506 | return skip_alpha(date); |
89967023 | 507 | } |
ecee9d9e | 508 | |
c933b28d | 509 | static int set_date(int year, int month, int day, struct tm *now_tm, time_t now, struct tm *tm) |
89967023 | 510 | { |
198b0fb6 | 511 | if (month > 0 && month < 13 && day > 0 && day < 32) { |
38035cf4 JH |
512 | struct tm check = *tm; |
513 | struct tm *r = (now_tm ? &check : tm); | |
514 | time_t specified; | |
515 | ||
516 | r->tm_mon = month - 1; | |
517 | r->tm_mday = day; | |
198b0fb6 | 518 | if (year == -1) { |
38035cf4 JH |
519 | if (!now_tm) |
520 | return 1; | |
521 | r->tm_year = now_tm->tm_year; | |
89967023 | 522 | } |
38035cf4 JH |
523 | else if (year >= 1970 && year < 2100) |
524 | r->tm_year = year - 1900; | |
525 | else if (year > 70 && year < 100) | |
526 | r->tm_year = year; | |
527 | else if (year < 38) | |
528 | r->tm_year = year + 100; | |
529 | else | |
c933b28d | 530 | return -1; |
38035cf4 | 531 | if (!now_tm) |
c933b28d | 532 | return 0; |
38035cf4 | 533 | |
bb5799d6 | 534 | specified = tm_to_time_t(r); |
198b0fb6 | 535 | |
38035cf4 JH |
536 | /* Be it commit time or author time, it does not make |
537 | * sense to specify timestamp way into the future. Make | |
538 | * sure it is not later than ten days from now... | |
539 | */ | |
e6e87516 | 540 | if ((specified != -1) && (now + 10*24*3600 < specified)) |
c933b28d | 541 | return -1; |
38035cf4 JH |
542 | tm->tm_mon = r->tm_mon; |
543 | tm->tm_mday = r->tm_mday; | |
544 | if (year != -1) | |
545 | tm->tm_year = r->tm_year; | |
c933b28d | 546 | return 0; |
89967023 | 547 | } |
c933b28d | 548 | return -1; |
198b0fb6 | 549 | } |
ecee9d9e | 550 | |
4f89f4fc ĐTCD |
551 | static int set_time(long hour, long minute, long second, struct tm *tm) |
552 | { | |
553 | /* We accept 61st second because of leap second */ | |
554 | if (0 <= hour && hour <= 24 && | |
555 | 0 <= minute && minute < 60 && | |
556 | 0 <= second && second <= 60) { | |
557 | tm->tm_hour = hour; | |
558 | tm->tm_min = minute; | |
559 | tm->tm_sec = second; | |
560 | return 0; | |
561 | } | |
562 | return -1; | |
563 | } | |
564 | ||
b784840c ĐTCD |
565 | static int is_date_known(struct tm *tm) |
566 | { | |
567 | return tm->tm_year != -1 && tm->tm_mon != -1 && tm->tm_mday != -1; | |
568 | } | |
569 | ||
dddbad72 | 570 | static int match_multi_number(timestamp_t num, char c, const char *date, |
073281e2 | 571 | char *end, struct tm *tm, time_t now) |
198b0fb6 | 572 | { |
38035cf4 JH |
573 | struct tm now_tm; |
574 | struct tm *refuse_future; | |
198b0fb6 LT |
575 | long num2, num3; |
576 | ||
577 | num2 = strtol(end+1, &end, 10); | |
578 | num3 = -1; | |
579 | if (*end == c && isdigit(end[1])) | |
580 | num3 = strtol(end+1, &end, 10); | |
581 | ||
582 | /* Time? Date? */ | |
89967023 | 583 | switch (c) { |
198b0fb6 LT |
584 | case ':': |
585 | if (num3 < 0) | |
586 | num3 = 0; | |
4f89f4fc | 587 | if (set_time(num, num2, num3, tm) == 0) { |
b784840c ĐTCD |
588 | /* |
589 | * If %H:%M:%S was just parsed followed by: .<num4> | |
590 | * Consider (& discard) it as fractional second | |
591 | * if %Y%m%d is parsed before. | |
592 | */ | |
593 | if (*end == '.' && isdigit(end[1]) && is_date_known(tm)) | |
594 | strtol(end + 1, &end, 10); | |
89967023 LT |
595 | break; |
596 | } | |
198b0fb6 | 597 | return 0; |
89967023 LT |
598 | |
599 | case '-': | |
600 | case '/': | |
38035cf4 | 601 | case '.': |
073281e2 JK |
602 | if (!now) |
603 | now = time(NULL); | |
38035cf4 JH |
604 | refuse_future = NULL; |
605 | if (gmtime_r(&now, &now_tm)) | |
606 | refuse_future = &now_tm; | |
607 | ||
198b0fb6 LT |
608 | if (num > 70) { |
609 | /* yyyy-mm-dd? */ | |
c933b28d | 610 | if (set_date(num, num2, num3, NULL, now, tm) == 0) |
198b0fb6 LT |
611 | break; |
612 | /* yyyy-dd-mm? */ | |
c933b28d | 613 | if (set_date(num, num3, num2, NULL, now, tm) == 0) |
89967023 | 614 | break; |
198b0fb6 | 615 | } |
38035cf4 JH |
616 | /* Our eastern European friends say dd.mm.yy[yy] |
617 | * is the norm there, so giving precedence to | |
618 | * mm/dd/yy[yy] form only when separator is not '.' | |
619 | */ | |
620 | if (c != '.' && | |
c933b28d | 621 | set_date(num3, num, num2, refuse_future, now, tm) == 0) |
38035cf4 JH |
622 | break; |
623 | /* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */ | |
c933b28d | 624 | if (set_date(num3, num2, num, refuse_future, now, tm) == 0) |
89967023 | 625 | break; |
38035cf4 JH |
626 | /* Funny European mm.dd.yy */ |
627 | if (c == '.' && | |
c933b28d | 628 | set_date(num3, num, num2, refuse_future, now, tm) == 0) |
198b0fb6 LT |
629 | break; |
630 | return 0; | |
631 | } | |
632 | return end - date; | |
633 | } | |
634 | ||
36e4986f LT |
635 | /* |
636 | * Have we filled in any part of the time/date yet? | |
637 | * We just do a binary 'and' to see if the sign bit | |
638 | * is set in all the values. | |
639 | */ | |
9f2b6d29 LT |
640 | static inline int nodate(struct tm *tm) |
641 | { | |
36e4986f LT |
642 | return (tm->tm_year & |
643 | tm->tm_mon & | |
644 | tm->tm_mday & | |
645 | tm->tm_hour & | |
646 | tm->tm_min & | |
647 | tm->tm_sec) < 0; | |
9f2b6d29 LT |
648 | } |
649 | ||
b56be499 ĐTCD |
650 | /* |
651 | * Have we seen an ISO-8601-alike date, i.e. 20220101T0, | |
652 | * In which, hour is still unset, | |
653 | * and minutes and second has been set to 0. | |
654 | */ | |
655 | static inline int maybeiso8601(struct tm *tm) | |
656 | { | |
657 | return tm->tm_hour == -1 && | |
658 | tm->tm_min == 0 && | |
659 | tm->tm_sec == 0; | |
660 | } | |
661 | ||
198b0fb6 | 662 | /* |
a6080a0a | 663 | * We've seen a digit. Time? Year? Date? |
198b0fb6 | 664 | */ |
26a2d8ae | 665 | static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt) |
198b0fb6 LT |
666 | { |
667 | int n; | |
668 | char *end; | |
dddbad72 | 669 | timestamp_t num; |
198b0fb6 | 670 | |
1aeb7e75 | 671 | num = parse_timestamp(date, &end, 10); |
198b0fb6 LT |
672 | |
673 | /* | |
a1a5a634 JS |
674 | * Seconds since 1970? We trigger on that for any numbers with |
675 | * more than 8 digits. This is because we don't want to rule out | |
676 | * numbers like 20070606 as a YYYYMMDD date. | |
198b0fb6 | 677 | */ |
9f2b6d29 | 678 | if (num >= 100000000 && nodate(tm)) { |
198b0fb6 | 679 | time_t time = num; |
9cb480f2 JH |
680 | if (gmtime_r(&time, tm)) { |
681 | *tm_gmt = 1; | |
198b0fb6 | 682 | return end - date; |
9cb480f2 | 683 | } |
198b0fb6 LT |
684 | } |
685 | ||
686 | /* | |
38035cf4 | 687 | * Check for special formats: num[-.:/]num[same]num |
198b0fb6 LT |
688 | */ |
689 | switch (*end) { | |
690 | case ':': | |
38035cf4 | 691 | case '.': |
198b0fb6 LT |
692 | case '/': |
693 | case '-': | |
694 | if (isdigit(end[1])) { | |
073281e2 | 695 | int match = match_multi_number(num, *end, date, end, tm, 0); |
198b0fb6 LT |
696 | if (match) |
697 | return match; | |
89967023 LT |
698 | } |
699 | } | |
198b0fb6 LT |
700 | |
701 | /* | |
702 | * None of the special formats? Try to guess what | |
703 | * the number meant. We use the number of digits | |
704 | * to make a more educated guess.. | |
705 | */ | |
706 | n = 0; | |
707 | do { | |
708 | n++; | |
709 | } while (isdigit(date[n])); | |
710 | ||
544ed961 ĐTCD |
711 | /* 8 digits, compact style of ISO-8601's date: YYYYmmDD */ |
712 | /* 6 digits, compact style of ISO-8601's time: HHMMSS */ | |
713 | if (n == 8 || n == 6) { | |
714 | unsigned int num1 = num / 10000; | |
715 | unsigned int num2 = (num % 10000) / 100; | |
716 | unsigned int num3 = num % 100; | |
717 | if (n == 8) | |
718 | set_date(num1, num2, num3, NULL, time(NULL), tm); | |
719 | else if (n == 6 && set_time(num1, num2, num3, tm) == 0 && | |
720 | *end == '.' && isdigit(end[1])) | |
721 | strtoul(end + 1, &end, 10); | |
722 | return end - date; | |
723 | } | |
724 | ||
b56be499 ĐTCD |
725 | /* reduced precision of ISO-8601's time: HHMM or HH */ |
726 | if (maybeiso8601(tm)) { | |
727 | unsigned int num1 = num; | |
728 | unsigned int num2 = 0; | |
729 | if (n == 4) { | |
730 | num1 = num / 100; | |
731 | num2 = num % 100; | |
732 | } | |
733 | if ((n == 4 || n == 2) && !nodate(tm) && | |
734 | set_time(num1, num2, 0, tm) == 0) | |
735 | return n; | |
736 | /* | |
737 | * We thought this is an ISO-8601 time string, | |
738 | * we set minutes and seconds to 0, | |
739 | * turn out it isn't, rollback the change. | |
740 | */ | |
741 | tm->tm_min = tm->tm_sec = -1; | |
742 | } | |
743 | ||
198b0fb6 LT |
744 | /* Four-digit year or a timezone? */ |
745 | if (n == 4) { | |
7122f82f | 746 | if (num <= 1400 && *offset == -1) { |
198b0fb6 LT |
747 | unsigned int minutes = num % 100; |
748 | unsigned int hours = num / 100; | |
749 | *offset = hours*60 + minutes; | |
750 | } else if (num > 1900 && num < 2100) | |
751 | tm->tm_year = num - 1900; | |
752 | return n; | |
753 | } | |
754 | ||
9f2b6d29 LT |
755 | /* |
756 | * Ignore lots of numerals. We took care of 4-digit years above. | |
757 | * Days or months must be one or two digits. | |
758 | */ | |
759 | if (n > 2) | |
760 | return n; | |
761 | ||
198b0fb6 LT |
762 | /* |
763 | * NOTE! We will give precedence to day-of-month over month or | |
82f9d58a | 764 | * year numbers in the 1-12 range. So 05 is always "mday 5", |
198b0fb6 LT |
765 | * unless we already have a mday.. |
766 | * | |
767 | * IOW, 01 Apr 05 parses as "April 1st, 2005". | |
768 | */ | |
769 | if (num > 0 && num < 32 && tm->tm_mday < 0) { | |
770 | tm->tm_mday = num; | |
771 | return n; | |
772 | } | |
773 | ||
774 | /* Two-digit year? */ | |
775 | if (n == 2 && tm->tm_year < 0) { | |
776 | if (num < 10 && tm->tm_mday >= 0) { | |
777 | tm->tm_year = num + 100; | |
778 | return n; | |
779 | } | |
780 | if (num >= 70) { | |
781 | tm->tm_year = num; | |
782 | return n; | |
783 | } | |
784 | } | |
785 | ||
90290552 | 786 | if (num > 0 && num < 13 && tm->tm_mon < 0) |
198b0fb6 | 787 | tm->tm_mon = num-1; |
a6080a0a | 788 | |
198b0fb6 | 789 | return n; |
89967023 | 790 | } |
ecee9d9e | 791 | |
26a2d8ae | 792 | static int match_tz(const char *date, int *offp) |
89967023 LT |
793 | { |
794 | char *end; | |
ee646eb4 HL |
795 | int hour = strtoul(date + 1, &end, 10); |
796 | int n = end - (date + 1); | |
797 | int min = 0; | |
ecee9d9e | 798 | |
ee646eb4 HL |
799 | if (n == 4) { |
800 | /* hhmm */ | |
801 | min = hour % 100; | |
802 | hour = hour / 100; | |
803 | } else if (n != 2) { | |
804 | min = 99; /* random crap */ | |
805 | } else if (*end == ':') { | |
806 | /* hh:mm? */ | |
807 | min = strtoul(end + 1, &end, 10); | |
808 | if (end - (date + 1) != 5) | |
809 | min = 99; /* random crap */ | |
810 | } /* otherwise we parsed "hh" */ | |
ecee9d9e | 811 | |
198b0fb6 | 812 | /* |
ee646eb4 HL |
813 | * Don't accept any random crap. Even though some places have |
814 | * offset larger than 12 hours (e.g. Pacific/Kiritimati is at | |
815 | * UTC+14), there is something wrong if hour part is much | |
816 | * larger than that. We might also want to check that the | |
817 | * minutes are divisible by 15 or something too. (Offset of | |
818 | * Kathmandu, Nepal is UTC+5:45) | |
198b0fb6 | 819 | */ |
ee646eb4 HL |
820 | if (min < 60 && hour < 24) { |
821 | int offset = hour * 60 + min; | |
68849b54 LT |
822 | if (*date == '-') |
823 | offset = -offset; | |
68849b54 LT |
824 | *offp = offset; |
825 | } | |
89967023 LT |
826 | return end - date; |
827 | } | |
ecee9d9e | 828 | |
dddbad72 | 829 | static void date_string(timestamp_t date, int offset, struct strbuf *buf) |
01c6ad29 LT |
830 | { |
831 | int sign = '+'; | |
832 | ||
833 | if (offset < 0) { | |
834 | offset = -offset; | |
835 | sign = '-'; | |
836 | } | |
cb71f8bd | 837 | strbuf_addf(buf, "%"PRItime" %c%02d%02d", date, sign, offset / 60, offset % 60); |
01c6ad29 LT |
838 | } |
839 | ||
116eb3ab JH |
840 | /* |
841 | * Parse a string like "0 +0000" as ancient timestamp near epoch, but | |
842 | * only when it appears not as part of any other string. | |
843 | */ | |
dddbad72 | 844 | static int match_object_header_date(const char *date, timestamp_t *timestamp, int *offset) |
116eb3ab JH |
845 | { |
846 | char *end; | |
dddbad72 | 847 | timestamp_t stamp; |
116eb3ab JH |
848 | int ofs; |
849 | ||
be21d167 | 850 | if (*date < '0' || '9' < *date) |
116eb3ab | 851 | return -1; |
1aeb7e75 | 852 | stamp = parse_timestamp(date, &end, 10); |
dddbad72 | 853 | if (*end != ' ' || stamp == TIME_MAX || (end[1] != '+' && end[1] != '-')) |
116eb3ab JH |
854 | return -1; |
855 | date = end + 2; | |
856 | ofs = strtol(date, &end, 10); | |
857 | if ((*end != '\0' && (*end != '\n')) || end != date + 4) | |
858 | return -1; | |
859 | ofs = (ofs / 100) * 60 + (ofs % 100); | |
860 | if (date[-1] == '-') | |
861 | ofs = -ofs; | |
862 | *timestamp = stamp; | |
863 | *offset = ofs; | |
864 | return 0; | |
865 | } | |
866 | ||
89967023 LT |
867 | /* Gr. strptime is crap for this; it doesn't have a way to require RFC2822 |
868 | (i.e. English) day/month names, and it doesn't work correctly with %z. */ | |
dddbad72 | 869 | int parse_date_basic(const char *date, timestamp_t *timestamp, int *offset) |
89967023 LT |
870 | { |
871 | struct tm tm; | |
c5043cc1 | 872 | int tm_gmt; |
dddbad72 | 873 | timestamp_t dummy_timestamp; |
c5043cc1 RR |
874 | int dummy_offset; |
875 | ||
876 | if (!timestamp) | |
877 | timestamp = &dummy_timestamp; | |
878 | if (!offset) | |
879 | offset = &dummy_offset; | |
ecee9d9e | 880 | |
89967023 LT |
881 | memset(&tm, 0, sizeof(tm)); |
882 | tm.tm_year = -1; | |
883 | tm.tm_mon = -1; | |
884 | tm.tm_mday = -1; | |
eaa85129 | 885 | tm.tm_isdst = -1; |
36e4986f LT |
886 | tm.tm_hour = -1; |
887 | tm.tm_min = -1; | |
888 | tm.tm_sec = -1; | |
c5043cc1 | 889 | *offset = -1; |
9cb480f2 | 890 | tm_gmt = 0; |
89967023 | 891 | |
2c733fb2 JH |
892 | if (*date == '@' && |
893 | !match_object_header_date(date + 1, timestamp, offset)) | |
116eb3ab | 894 | return 0; /* success */ |
89967023 LT |
895 | for (;;) { |
896 | int match = 0; | |
897 | unsigned char c = *date; | |
898 | ||
899 | /* Stop at end of string or newline */ | |
900 | if (!c || c == '\n') | |
901 | break; | |
902 | ||
903 | if (isalpha(c)) | |
c5043cc1 | 904 | match = match_alpha(date, &tm, offset); |
89967023 | 905 | else if (isdigit(c)) |
c5043cc1 | 906 | match = match_digit(date, &tm, offset, &tm_gmt); |
89967023 | 907 | else if ((c == '-' || c == '+') && isdigit(date[1])) |
c5043cc1 | 908 | match = match_tz(date, offset); |
89967023 LT |
909 | |
910 | if (!match) { | |
911 | /* BAD CRAP */ | |
912 | match = 1; | |
a6080a0a | 913 | } |
89967023 LT |
914 | |
915 | date += match; | |
916 | } | |
ecee9d9e | 917 | |
f6e63621 | 918 | /* do not use mktime(), which uses local timezone, here */ |
c5043cc1 | 919 | *timestamp = tm_to_time_t(&tm); |
7fcec48d JH |
920 | if (*timestamp == -1) |
921 | return -1; | |
922 | ||
e1033da6 | 923 | if (*offset == -1) { |
f6e63621 JH |
924 | time_t temp_time; |
925 | ||
926 | /* gmtime_r() in match_digit() may have clobbered it */ | |
927 | tm.tm_isdst = -1; | |
928 | temp_time = mktime(&tm); | |
e1033da6 MG |
929 | if ((time_t)*timestamp > temp_time) { |
930 | *offset = ((time_t)*timestamp - temp_time) / 60; | |
931 | } else { | |
932 | *offset = -(int)((temp_time - (time_t)*timestamp) / 60); | |
933 | } | |
934 | } | |
eaa85129 | 935 | |
9cb480f2 | 936 | if (!tm_gmt) |
c5043cc1 | 937 | *timestamp -= *offset * 60; |
9644c061 | 938 | return 0; /* success */ |
c5043cc1 RR |
939 | } |
940 | ||
dddbad72 | 941 | int parse_expiry_date(const char *date, timestamp_t *timestamp) |
3d27b9b0 JH |
942 | { |
943 | int errors = 0; | |
944 | ||
945 | if (!strcmp(date, "never") || !strcmp(date, "false")) | |
946 | *timestamp = 0; | |
947 | else if (!strcmp(date, "all") || !strcmp(date, "now")) | |
948 | /* | |
949 | * We take over "now" here, which usually translates | |
950 | * to the current timestamp. This is because the user | |
0e20b229 | 951 | * really means to expire everything that was done in |
3d27b9b0 JH |
952 | * the past, and by definition reflogs are the record |
953 | * of the past, and there is nothing from the future | |
954 | * to be kept. | |
955 | */ | |
dddbad72 | 956 | *timestamp = TIME_MAX; |
3d27b9b0 JH |
957 | else |
958 | *timestamp = approxidate_careful(date, &errors); | |
959 | ||
960 | return errors; | |
961 | } | |
962 | ||
c33ddc2e | 963 | int parse_date(const char *date, struct strbuf *result) |
c5043cc1 | 964 | { |
dddbad72 | 965 | timestamp_t timestamp; |
c5043cc1 | 966 | int offset; |
9644c061 | 967 | if (parse_date_basic(date, ×tamp, &offset)) |
c5043cc1 | 968 | return -1; |
c33ddc2e JK |
969 | date_string(timestamp, offset, result); |
970 | return 0; | |
ecee9d9e ET |
971 | } |
972 | ||
add00ba2 JK |
973 | static enum date_mode_type parse_date_type(const char *format, const char **end) |
974 | { | |
975 | if (skip_prefix(format, "relative", end)) | |
976 | return DATE_RELATIVE; | |
977 | if (skip_prefix(format, "iso8601-strict", end) || | |
978 | skip_prefix(format, "iso-strict", end)) | |
979 | return DATE_ISO8601_STRICT; | |
980 | if (skip_prefix(format, "iso8601", end) || | |
981 | skip_prefix(format, "iso", end)) | |
982 | return DATE_ISO8601; | |
983 | if (skip_prefix(format, "rfc2822", end) || | |
984 | skip_prefix(format, "rfc", end)) | |
985 | return DATE_RFC2822; | |
986 | if (skip_prefix(format, "short", end)) | |
987 | return DATE_SHORT; | |
988 | if (skip_prefix(format, "default", end)) | |
989 | return DATE_NORMAL; | |
acdd3776 LT |
990 | if (skip_prefix(format, "human", end)) |
991 | return DATE_HUMAN; | |
add00ba2 JK |
992 | if (skip_prefix(format, "raw", end)) |
993 | return DATE_RAW; | |
642833db JK |
994 | if (skip_prefix(format, "unix", end)) |
995 | return DATE_UNIX; | |
add00ba2 JK |
996 | if (skip_prefix(format, "format", end)) |
997 | return DATE_STRFTIME; | |
5a59a230 NTND |
998 | /* |
999 | * Please update $__git_log_date_formats in | |
1000 | * git-completion.bash when you add new formats. | |
1001 | */ | |
add00ba2 JK |
1002 | |
1003 | die("unknown date format %s", format); | |
1004 | } | |
1005 | ||
a5481a6c | 1006 | void parse_date_format(const char *format, struct date_mode *mode) |
856665f8 | 1007 | { |
add00ba2 JK |
1008 | const char *p; |
1009 | ||
2fd7c229 SS |
1010 | /* "auto:foo" is "if tty/pager, then foo, otherwise normal" */ |
1011 | if (skip_prefix(format, "auto:", &p)) { | |
1012 | if (isatty(1) || pager_in_use()) | |
1013 | format = p; | |
1014 | else | |
1015 | format = "default"; | |
1016 | } | |
1017 | ||
add00ba2 JK |
1018 | /* historical alias */ |
1019 | if (!strcmp(format, "local")) | |
1020 | format = "default-local"; | |
1021 | ||
1022 | mode->type = parse_date_type(format, &p); | |
1023 | mode->local = 0; | |
1024 | ||
1025 | if (skip_prefix(p, "-local", &p)) | |
1026 | mode->local = 1; | |
1027 | ||
1028 | if (mode->type == DATE_STRFTIME) { | |
1029 | if (!skip_prefix(p, ":", &p)) | |
1030 | die("date format missing colon separator: %s", format); | |
1031 | mode->strftime_fmt = xstrdup(p); | |
1032 | } else if (*p) | |
856665f8 AP |
1033 | die("unknown date format %s", format); |
1034 | } | |
1035 | ||
974c919d ÆAB |
1036 | void date_mode_release(struct date_mode *mode) |
1037 | { | |
1038 | free((char *)mode->strftime_fmt); | |
1039 | } | |
1040 | ||
c33ddc2e | 1041 | void datestamp(struct strbuf *out) |
ecee9d9e ET |
1042 | { |
1043 | time_t now; | |
1044 | int offset; | |
ccd46945 | 1045 | struct tm tm = { 0 }; |
ecee9d9e ET |
1046 | |
1047 | time(&now); | |
1048 | ||
ccd46945 | 1049 | offset = tm_to_time_t(localtime_r(&now, &tm)) - now; |
ecee9d9e ET |
1050 | offset /= 60; |
1051 | ||
c33ddc2e | 1052 | date_string(now, offset, out); |
ecee9d9e | 1053 | } |
3c07b1d1 | 1054 | |
90290552 LT |
1055 | /* |
1056 | * Relative time update (eg "2 days ago"). If we haven't set the time | |
1057 | * yet, we need to set it from current time. | |
1058 | */ | |
dddbad72 | 1059 | static time_t update_tm(struct tm *tm, struct tm *now, time_t sec) |
3c07b1d1 | 1060 | { |
90290552 LT |
1061 | time_t n; |
1062 | ||
1063 | if (tm->tm_mday < 0) | |
1064 | tm->tm_mday = now->tm_mday; | |
1065 | if (tm->tm_mon < 0) | |
1066 | tm->tm_mon = now->tm_mon; | |
1067 | if (tm->tm_year < 0) { | |
1068 | tm->tm_year = now->tm_year; | |
1069 | if (tm->tm_mon > now->tm_mon) | |
1070 | tm->tm_year--; | |
1071 | } | |
1072 | ||
1073 | n = mktime(tm) - sec; | |
3c07b1d1 | 1074 | localtime_r(&n, tm); |
90290552 | 1075 | return n; |
3c07b1d1 LT |
1076 | } |
1077 | ||
c27cc94f JK |
1078 | /* |
1079 | * Do we have a pending number at the end, or when | |
1080 | * we see a new one? Let's assume it's a month day, | |
1081 | * as in "Dec 6, 1992" | |
1082 | */ | |
1083 | static void pending_number(struct tm *tm, int *num) | |
1084 | { | |
1085 | int number = *num; | |
1086 | ||
1087 | if (number) { | |
1088 | *num = 0; | |
1089 | if (tm->tm_mday < 0 && number < 32) | |
1090 | tm->tm_mday = number; | |
1091 | else if (tm->tm_mon < 0 && number < 13) | |
1092 | tm->tm_mon = number-1; | |
1093 | else if (tm->tm_year < 0) { | |
1094 | if (number > 1969 && number < 2100) | |
1095 | tm->tm_year = number - 1900; | |
1096 | else if (number > 69 && number < 100) | |
1097 | tm->tm_year = number; | |
1098 | else if (number < 38) | |
1099 | tm->tm_year = 100 + number; | |
1100 | /* We screw up for number = 00 ? */ | |
1101 | } | |
1102 | } | |
1103 | } | |
1104 | ||
93cfa7c7 JH |
1105 | static void date_now(struct tm *tm, struct tm *now, int *num) |
1106 | { | |
c27cc94f | 1107 | *num = 0; |
93cfa7c7 JH |
1108 | update_tm(tm, now, 0); |
1109 | } | |
1110 | ||
90290552 | 1111 | static void date_yesterday(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 1112 | { |
c27cc94f | 1113 | *num = 0; |
90290552 | 1114 | update_tm(tm, now, 24*60*60); |
a8aca418 LT |
1115 | } |
1116 | ||
90290552 | 1117 | static void date_time(struct tm *tm, struct tm *now, int hour) |
a8aca418 LT |
1118 | { |
1119 | if (tm->tm_hour < hour) | |
aa097b88 | 1120 | update_tm(tm, now, 24*60*60); |
a8aca418 LT |
1121 | tm->tm_hour = hour; |
1122 | tm->tm_min = 0; | |
1123 | tm->tm_sec = 0; | |
1124 | } | |
1125 | ||
90290552 | 1126 | static void date_midnight(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 1127 | { |
c27cc94f | 1128 | pending_number(tm, num); |
90290552 | 1129 | date_time(tm, now, 0); |
a8aca418 LT |
1130 | } |
1131 | ||
90290552 | 1132 | static void date_noon(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 1133 | { |
c27cc94f | 1134 | pending_number(tm, num); |
90290552 | 1135 | date_time(tm, now, 12); |
a8aca418 LT |
1136 | } |
1137 | ||
90290552 | 1138 | static void date_tea(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 1139 | { |
c27cc94f | 1140 | pending_number(tm, num); |
90290552 | 1141 | date_time(tm, now, 17); |
a8aca418 LT |
1142 | } |
1143 | ||
7829746a | 1144 | static void date_pm(struct tm *tm, struct tm *now UNUSED, int *num) |
393d340e | 1145 | { |
18b633ca | 1146 | int hour, n = *num; |
393d340e LT |
1147 | *num = 0; |
1148 | ||
18b633ca LT |
1149 | hour = tm->tm_hour; |
1150 | if (n) { | |
1151 | hour = n; | |
393d340e LT |
1152 | tm->tm_min = 0; |
1153 | tm->tm_sec = 0; | |
1154 | } | |
18b633ca | 1155 | tm->tm_hour = (hour % 12) + 12; |
393d340e LT |
1156 | } |
1157 | ||
7829746a | 1158 | static void date_am(struct tm *tm, struct tm *now UNUSED, int *num) |
393d340e | 1159 | { |
18b633ca | 1160 | int hour, n = *num; |
393d340e LT |
1161 | *num = 0; |
1162 | ||
18b633ca LT |
1163 | hour = tm->tm_hour; |
1164 | if (n) { | |
1165 | hour = n; | |
393d340e LT |
1166 | tm->tm_min = 0; |
1167 | tm->tm_sec = 0; | |
1168 | } | |
18b633ca | 1169 | tm->tm_hour = (hour % 12); |
393d340e LT |
1170 | } |
1171 | ||
7829746a | 1172 | static void date_never(struct tm *tm, struct tm *now UNUSED, int *num) |
af66366a | 1173 | { |
8c6b5786 OM |
1174 | time_t n = 0; |
1175 | localtime_r(&n, tm); | |
c27cc94f | 1176 | *num = 0; |
af66366a JS |
1177 | } |
1178 | ||
a8aca418 LT |
1179 | static const struct special { |
1180 | const char *name; | |
90290552 | 1181 | void (*fn)(struct tm *, struct tm *, int *); |
a8aca418 LT |
1182 | } special[] = { |
1183 | { "yesterday", date_yesterday }, | |
1184 | { "noon", date_noon }, | |
1185 | { "midnight", date_midnight }, | |
1186 | { "tea", date_tea }, | |
393d340e LT |
1187 | { "PM", date_pm }, |
1188 | { "AM", date_am }, | |
af66366a | 1189 | { "never", date_never }, |
93cfa7c7 | 1190 | { "now", date_now }, |
a8aca418 LT |
1191 | { NULL } |
1192 | }; | |
1193 | ||
3c07b1d1 LT |
1194 | static const char *number_name[] = { |
1195 | "zero", "one", "two", "three", "four", | |
1196 | "five", "six", "seven", "eight", "nine", "ten", | |
1197 | }; | |
1198 | ||
a8aca418 | 1199 | static const struct typelen { |
3c07b1d1 LT |
1200 | const char *type; |
1201 | int length; | |
1202 | } typelen[] = { | |
1203 | { "seconds", 1 }, | |
1204 | { "minutes", 60 }, | |
1205 | { "hours", 60*60 }, | |
1206 | { "days", 24*60*60 }, | |
1207 | { "weeks", 7*24*60*60 }, | |
1208 | { NULL } | |
a6080a0a | 1209 | }; |
3c07b1d1 | 1210 | |
93cfa7c7 | 1211 | static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm *now, int *num, int *touched) |
3c07b1d1 | 1212 | { |
a8aca418 LT |
1213 | const struct typelen *tl; |
1214 | const struct special *s; | |
3c07b1d1 | 1215 | const char *end = date; |
5df7dbba | 1216 | int i; |
3c07b1d1 | 1217 | |
38db01b7 | 1218 | while (isalpha(*++end)) |
5df7dbba | 1219 | ; |
3c07b1d1 LT |
1220 | |
1221 | for (i = 0; i < 12; i++) { | |
1222 | int match = match_string(date, month_names[i]); | |
1223 | if (match >= 3) { | |
1224 | tm->tm_mon = i; | |
93cfa7c7 | 1225 | *touched = 1; |
3c07b1d1 LT |
1226 | return end; |
1227 | } | |
1228 | } | |
1229 | ||
a8aca418 LT |
1230 | for (s = special; s->name; s++) { |
1231 | int len = strlen(s->name); | |
1232 | if (match_string(date, s->name) == len) { | |
90290552 | 1233 | s->fn(tm, now, num); |
93cfa7c7 | 1234 | *touched = 1; |
a8aca418 LT |
1235 | return end; |
1236 | } | |
3c07b1d1 LT |
1237 | } |
1238 | ||
1239 | if (!*num) { | |
1240 | for (i = 1; i < 11; i++) { | |
1241 | int len = strlen(number_name[i]); | |
1242 | if (match_string(date, number_name[i]) == len) { | |
1243 | *num = i; | |
93cfa7c7 | 1244 | *touched = 1; |
3c07b1d1 LT |
1245 | return end; |
1246 | } | |
1247 | } | |
93cfa7c7 | 1248 | if (match_string(date, "last") == 4) { |
3c07b1d1 | 1249 | *num = 1; |
93cfa7c7 JH |
1250 | *touched = 1; |
1251 | } | |
3c07b1d1 LT |
1252 | return end; |
1253 | } | |
1254 | ||
1255 | tl = typelen; | |
1256 | while (tl->type) { | |
1257 | int len = strlen(tl->type); | |
1258 | if (match_string(date, tl->type) >= len-1) { | |
90290552 | 1259 | update_tm(tm, now, tl->length * *num); |
3c07b1d1 | 1260 | *num = 0; |
93cfa7c7 | 1261 | *touched = 1; |
3c07b1d1 LT |
1262 | return end; |
1263 | } | |
1264 | tl++; | |
1265 | } | |
1266 | ||
6b7b0427 LT |
1267 | for (i = 0; i < 7; i++) { |
1268 | int match = match_string(date, weekday_names[i]); | |
1269 | if (match >= 3) { | |
1270 | int diff, n = *num -1; | |
1271 | *num = 0; | |
1272 | ||
1273 | diff = tm->tm_wday - i; | |
1274 | if (diff <= 0) | |
1275 | n++; | |
1276 | diff += 7*n; | |
1277 | ||
90290552 | 1278 | update_tm(tm, now, diff * 24 * 60 * 60); |
93cfa7c7 | 1279 | *touched = 1; |
6b7b0427 LT |
1280 | return end; |
1281 | } | |
1282 | } | |
1283 | ||
3c07b1d1 | 1284 | if (match_string(date, "months") >= 5) { |
931e8e27 JK |
1285 | int n; |
1286 | update_tm(tm, now, 0); /* fill in date fields if needed */ | |
1287 | n = tm->tm_mon - *num; | |
3c07b1d1 LT |
1288 | *num = 0; |
1289 | while (n < 0) { | |
1290 | n += 12; | |
1291 | tm->tm_year--; | |
1292 | } | |
1293 | tm->tm_mon = n; | |
93cfa7c7 | 1294 | *touched = 1; |
3c07b1d1 LT |
1295 | return end; |
1296 | } | |
1297 | ||
1298 | if (match_string(date, "years") >= 4) { | |
931e8e27 | 1299 | update_tm(tm, now, 0); /* fill in date fields if needed */ |
3c07b1d1 LT |
1300 | tm->tm_year -= *num; |
1301 | *num = 0; | |
93cfa7c7 | 1302 | *touched = 1; |
3c07b1d1 LT |
1303 | return end; |
1304 | } | |
1305 | ||
1306 | return end; | |
1307 | } | |
1308 | ||
073281e2 JK |
1309 | static const char *approxidate_digit(const char *date, struct tm *tm, int *num, |
1310 | time_t now) | |
e92a54d9 LT |
1311 | { |
1312 | char *end; | |
dddbad72 | 1313 | timestamp_t number = parse_timestamp(date, &end, 10); |
e92a54d9 | 1314 | |
393d340e LT |
1315 | switch (*end) { |
1316 | case ':': | |
1317 | case '.': | |
1318 | case '/': | |
1319 | case '-': | |
1320 | if (isdigit(end[1])) { | |
073281e2 JK |
1321 | int match = match_multi_number(number, *end, date, end, |
1322 | tm, now); | |
393d340e LT |
1323 | if (match) |
1324 | return date + match; | |
1325 | } | |
1326 | } | |
1327 | ||
9f2b6d29 LT |
1328 | /* Accept zero-padding only for small numbers ("Dec 02", never "Dec 0002") */ |
1329 | if (date[0] != '0' || end - date <= 2) | |
1330 | *num = number; | |
e92a54d9 LT |
1331 | return end; |
1332 | } | |
1333 | ||
dddbad72 JS |
1334 | static timestamp_t approxidate_str(const char *date, |
1335 | const struct timeval *tv, | |
1336 | int *error_ret) | |
3c07b1d1 LT |
1337 | { |
1338 | int number = 0; | |
93cfa7c7 | 1339 | int touched = 0; |
3c07b1d1 | 1340 | struct tm tm, now; |
f697b33b | 1341 | time_t time_sec; |
3c07b1d1 | 1342 | |
33012fc4 | 1343 | time_sec = tv->tv_sec; |
f697b33b | 1344 | localtime_r(&time_sec, &tm); |
3c07b1d1 | 1345 | now = tm; |
90290552 LT |
1346 | |
1347 | tm.tm_year = -1; | |
1348 | tm.tm_mon = -1; | |
1349 | tm.tm_mday = -1; | |
1350 | ||
3c07b1d1 LT |
1351 | for (;;) { |
1352 | unsigned char c = *date; | |
1353 | if (!c) | |
1354 | break; | |
1355 | date++; | |
1356 | if (isdigit(c)) { | |
90290552 | 1357 | pending_number(&tm, &number); |
073281e2 | 1358 | date = approxidate_digit(date-1, &tm, &number, time_sec); |
93cfa7c7 | 1359 | touched = 1; |
3c07b1d1 LT |
1360 | continue; |
1361 | } | |
1362 | if (isalpha(c)) | |
93cfa7c7 | 1363 | date = approxidate_alpha(date-1, &tm, &now, &number, &touched); |
3c07b1d1 | 1364 | } |
90290552 | 1365 | pending_number(&tm, &number); |
93cfa7c7 JH |
1366 | if (!touched) |
1367 | *error_ret = 1; | |
dddbad72 | 1368 | return (timestamp_t)update_tm(&tm, &now, 0); |
3c07b1d1 | 1369 | } |
33012fc4 | 1370 | |
dddbad72 | 1371 | timestamp_t approxidate_careful(const char *date, int *error_ret) |
33012fc4 AR |
1372 | { |
1373 | struct timeval tv; | |
dddbad72 | 1374 | timestamp_t timestamp; |
c5043cc1 | 1375 | int offset; |
93cfa7c7 JH |
1376 | int dummy = 0; |
1377 | if (!error_ret) | |
1378 | error_ret = &dummy; | |
33012fc4 | 1379 | |
9644c061 | 1380 | if (!parse_date_basic(date, ×tamp, &offset)) { |
93cfa7c7 | 1381 | *error_ret = 0; |
c5043cc1 | 1382 | return timestamp; |
93cfa7c7 | 1383 | } |
33012fc4 | 1384 | |
b841d4ff | 1385 | get_time(&tv); |
93cfa7c7 | 1386 | return approxidate_str(date, &tv, error_ret); |
33012fc4 | 1387 | } |
7ca36d93 | 1388 | |
dddbad72 | 1389 | int date_overflows(timestamp_t t) |
7ca36d93 JK |
1390 | { |
1391 | time_t sys; | |
1392 | ||
dddbad72 JS |
1393 | /* If we overflowed our timestamp data type, that's bad... */ |
1394 | if ((uintmax_t)t >= TIME_MAX) | |
7ca36d93 JK |
1395 | return 1; |
1396 | ||
1397 | /* | |
1398 | * ...but we also are going to feed the result to system | |
1399 | * functions that expect time_t, which is often "signed long". | |
1400 | * Make sure that we fit into time_t, as well. | |
1401 | */ | |
1402 | sys = t; | |
1403 | return t != sys || (t < 1) != (sys < 1); | |
1404 | } |