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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 | ||
9720d23e | 210 | struct date_mode date_mode_from_type(enum date_mode_type type) |
a5481a6c | 211 | { |
9720d23e | 212 | struct date_mode mode = DATE_MODE_INIT; |
aa1462cc | 213 | if (type == DATE_STRFTIME) |
033abf97 | 214 | BUG("cannot create anonymous strftime date_mode struct"); |
a5481a6c | 215 | mode.type = type; |
9720d23e | 216 | return mode; |
a5481a6c JK |
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 | ||
9720d23e | 286 | const char *show_date(timestamp_t time, int tz, 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 | |
9720d23e | 294 | if (mode.type == DATE_UNIX) { |
642833db | 295 | strbuf_reset(&timebuf); |
cb71f8bd | 296 | strbuf_addf(&timebuf, "%"PRItime, time); |
642833db JK |
297 | return timebuf.buf; |
298 | } | |
299 | ||
9720d23e | 300 | if (mode.type == DATE_HUMAN) { |
acdd3776 LT |
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 | ||
9720d23e | 309 | if (mode.local) |
dc6d782c JK |
310 | tz = local_tzoffset(time); |
311 | ||
9720d23e | 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 | ||
9720d23e | 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 | ||
9720d23e | 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); | |
9720d23e | 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); |
9720d23e | 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); | |
9720d23e | 344 | else if (mode.type == DATE_ISO8601_STRICT) { |
69e2bee1 | 345 | strbuf_addf(&timebuf, "%04d-%02d-%02dT%02d:%02d:%02d", |
466fb674 BB |
346 | tm->tm_year + 1900, |
347 | tm->tm_mon + 1, | |
348 | tm->tm_mday, | |
69e2bee1 BB |
349 | tm->tm_hour, tm->tm_min, tm->tm_sec); |
350 | if (tz == 0) { | |
351 | strbuf_addch(&timebuf, 'Z'); | |
352 | } else { | |
353 | strbuf_addch(&timebuf, tz >= 0 ? '+' : '-'); | |
354 | tz = abs(tz); | |
355 | strbuf_addf(&timebuf, "%02d:%02d", tz / 100, tz % 100); | |
356 | } | |
9720d23e | 357 | } else if (mode.type == DATE_RFC2822) |
7d29afd4 | 358 | strbuf_addf(&timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d", |
73013afd JH |
359 | weekday_names[tm->tm_wday], tm->tm_mday, |
360 | month_names[tm->tm_mon], tm->tm_year + 1900, | |
361 | tm->tm_hour, tm->tm_min, tm->tm_sec, tz); | |
9720d23e RS |
362 | else if (mode.type == DATE_STRFTIME) |
363 | strbuf_addftime(&timebuf, mode.strftime_fmt, tm, tz, | |
364 | !mode.local); | |
f8493ec0 | 365 | else |
9720d23e | 366 | show_date_normal(&timebuf, time, tm, tz, &human_tm, human_tz, mode.local); |
7d29afd4 | 367 | return timebuf.buf; |
f80cd783 LT |
368 | } |
369 | ||
89967023 LT |
370 | /* |
371 | * Check these. And note how it doesn't do the summer-time conversion. | |
372 | * | |
373 | * In my world, it's always summer, and things are probably a bit off | |
374 | * in other ways too. | |
375 | */ | |
376 | static const struct { | |
377 | const char *name; | |
378 | int offset; | |
5e2a78a4 | 379 | int dst; |
89967023 | 380 | } timezone_names[] = { |
5e2a78a4 LT |
381 | { "IDLW", -12, 0, }, /* International Date Line West */ |
382 | { "NT", -11, 0, }, /* Nome */ | |
383 | { "CAT", -10, 0, }, /* Central Alaska */ | |
384 | { "HST", -10, 0, }, /* Hawaii Standard */ | |
385 | { "HDT", -10, 1, }, /* Hawaii Daylight */ | |
386 | { "YST", -9, 0, }, /* Yukon Standard */ | |
387 | { "YDT", -9, 1, }, /* Yukon Daylight */ | |
388 | { "PST", -8, 0, }, /* Pacific Standard */ | |
389 | { "PDT", -8, 1, }, /* Pacific Daylight */ | |
390 | { "MST", -7, 0, }, /* Mountain Standard */ | |
391 | { "MDT", -7, 1, }, /* Mountain Daylight */ | |
392 | { "CST", -6, 0, }, /* Central Standard */ | |
393 | { "CDT", -6, 1, }, /* Central Daylight */ | |
394 | { "EST", -5, 0, }, /* Eastern Standard */ | |
395 | { "EDT", -5, 1, }, /* Eastern Daylight */ | |
396 | { "AST", -3, 0, }, /* Atlantic Standard */ | |
397 | { "ADT", -3, 1, }, /* Atlantic Daylight */ | |
398 | { "WAT", -1, 0, }, /* West Africa */ | |
399 | ||
400 | { "GMT", 0, 0, }, /* Greenwich Mean */ | |
401 | { "UTC", 0, 0, }, /* Universal (Coordinated) */ | |
75b37e70 | 402 | { "Z", 0, 0, }, /* Zulu, alias for UTC */ |
5e2a78a4 LT |
403 | |
404 | { "WET", 0, 0, }, /* Western European */ | |
405 | { "BST", 0, 1, }, /* British Summer */ | |
406 | { "CET", +1, 0, }, /* Central European */ | |
407 | { "MET", +1, 0, }, /* Middle European */ | |
408 | { "MEWT", +1, 0, }, /* Middle European Winter */ | |
409 | { "MEST", +1, 1, }, /* Middle European Summer */ | |
410 | { "CEST", +1, 1, }, /* Central European Summer */ | |
411 | { "MESZ", +1, 1, }, /* Middle European Summer */ | |
412 | { "FWT", +1, 0, }, /* French Winter */ | |
413 | { "FST", +1, 1, }, /* French Summer */ | |
414 | { "EET", +2, 0, }, /* Eastern Europe, USSR Zone 1 */ | |
92e2311b | 415 | { "EEST", +2, 1, }, /* Eastern European Daylight */ |
5e2a78a4 LT |
416 | { "WAST", +7, 0, }, /* West Australian Standard */ |
417 | { "WADT", +7, 1, }, /* West Australian Daylight */ | |
418 | { "CCT", +8, 0, }, /* China Coast, USSR Zone 7 */ | |
419 | { "JST", +9, 0, }, /* Japan Standard, USSR Zone 8 */ | |
420 | { "EAST", +10, 0, }, /* Eastern Australian Standard */ | |
421 | { "EADT", +10, 1, }, /* Eastern Australian Daylight */ | |
422 | { "GST", +10, 0, }, /* Guam Standard, USSR Zone 9 */ | |
695ed472 SD |
423 | { "NZT", +12, 0, }, /* New Zealand */ |
424 | { "NZST", +12, 0, }, /* New Zealand Standard */ | |
425 | { "NZDT", +12, 1, }, /* New Zealand Daylight */ | |
5e2a78a4 | 426 | { "IDLE", +12, 0, }, /* International Date Line East */ |
89967023 | 427 | }; |
ecee9d9e | 428 | |
89967023 | 429 | static int match_string(const char *date, const char *str) |
ecee9d9e | 430 | { |
89967023 LT |
431 | int i = 0; |
432 | ||
433 | for (i = 0; *date; date++, str++, i++) { | |
434 | if (*date == *str) | |
435 | continue; | |
436 | if (toupper(*date) == toupper(*str)) | |
437 | continue; | |
438 | if (!isalnum(*date)) | |
439 | break; | |
440 | return 0; | |
441 | } | |
442 | return i; | |
ecee9d9e ET |
443 | } |
444 | ||
68849b54 LT |
445 | static int skip_alpha(const char *date) |
446 | { | |
447 | int i = 0; | |
448 | do { | |
449 | i++; | |
450 | } while (isalpha(date[i])); | |
451 | return i; | |
452 | } | |
453 | ||
89967023 LT |
454 | /* |
455 | * Parse month, weekday, or timezone name | |
456 | */ | |
457 | static int match_alpha(const char *date, struct tm *tm, int *offset) | |
ecee9d9e | 458 | { |
89967023 | 459 | int i; |
ecee9d9e | 460 | |
89967023 LT |
461 | for (i = 0; i < 12; i++) { |
462 | int match = match_string(date, month_names[i]); | |
463 | if (match >= 3) { | |
464 | tm->tm_mon = i; | |
465 | return match; | |
ecee9d9e | 466 | } |
89967023 | 467 | } |
ecee9d9e | 468 | |
89967023 LT |
469 | for (i = 0; i < 7; i++) { |
470 | int match = match_string(date, weekday_names[i]); | |
471 | if (match >= 3) { | |
472 | tm->tm_wday = i; | |
473 | return match; | |
474 | } | |
475 | } | |
ecee9d9e | 476 | |
b4f2a6ac | 477 | for (i = 0; i < ARRAY_SIZE(timezone_names); i++) { |
89967023 | 478 | int match = match_string(date, timezone_names[i].name); |
75b37e70 | 479 | if (match >= 3 || match == strlen(timezone_names[i].name)) { |
5e2a78a4 LT |
480 | int off = timezone_names[i].offset; |
481 | ||
482 | /* This is bogus, but we like summer */ | |
483 | off += timezone_names[i].dst; | |
484 | ||
92e2311b LT |
485 | /* Only use the tz name offset if we don't have anything better */ |
486 | if (*offset == -1) | |
487 | *offset = 60*off; | |
488 | ||
89967023 | 489 | return match; |
ecee9d9e ET |
490 | } |
491 | } | |
ecee9d9e | 492 | |
68849b54 | 493 | if (match_string(date, "PM") == 2) { |
18b633ca LT |
494 | tm->tm_hour = (tm->tm_hour % 12) + 12; |
495 | return 2; | |
496 | } | |
497 | ||
498 | if (match_string(date, "AM") == 2) { | |
499 | tm->tm_hour = (tm->tm_hour % 12) + 0; | |
68849b54 LT |
500 | return 2; |
501 | } | |
502 | ||
b56be499 ĐTCD |
503 | /* ISO-8601 allows yyyymmDD'T'HHMMSS, with less precision */ |
504 | if (*date == 'T' && isdigit(date[1]) && tm->tm_hour == -1) { | |
505 | tm->tm_min = tm->tm_sec = 0; | |
506 | return 1; | |
507 | } | |
508 | ||
89967023 | 509 | /* BAD CRAP */ |
68849b54 | 510 | return skip_alpha(date); |
89967023 | 511 | } |
ecee9d9e | 512 | |
c933b28d | 513 | static int set_date(int year, int month, int day, struct tm *now_tm, time_t now, struct tm *tm) |
89967023 | 514 | { |
198b0fb6 | 515 | if (month > 0 && month < 13 && day > 0 && day < 32) { |
38035cf4 JH |
516 | struct tm check = *tm; |
517 | struct tm *r = (now_tm ? &check : tm); | |
518 | time_t specified; | |
519 | ||
520 | r->tm_mon = month - 1; | |
521 | r->tm_mday = day; | |
198b0fb6 | 522 | if (year == -1) { |
38035cf4 JH |
523 | if (!now_tm) |
524 | return 1; | |
525 | r->tm_year = now_tm->tm_year; | |
89967023 | 526 | } |
38035cf4 JH |
527 | else if (year >= 1970 && year < 2100) |
528 | r->tm_year = year - 1900; | |
529 | else if (year > 70 && year < 100) | |
530 | r->tm_year = year; | |
531 | else if (year < 38) | |
532 | r->tm_year = year + 100; | |
533 | else | |
c933b28d | 534 | return -1; |
38035cf4 | 535 | if (!now_tm) |
c933b28d | 536 | return 0; |
38035cf4 | 537 | |
bb5799d6 | 538 | specified = tm_to_time_t(r); |
198b0fb6 | 539 | |
38035cf4 JH |
540 | /* Be it commit time or author time, it does not make |
541 | * sense to specify timestamp way into the future. Make | |
542 | * sure it is not later than ten days from now... | |
543 | */ | |
e6e87516 | 544 | if ((specified != -1) && (now + 10*24*3600 < specified)) |
c933b28d | 545 | return -1; |
38035cf4 JH |
546 | tm->tm_mon = r->tm_mon; |
547 | tm->tm_mday = r->tm_mday; | |
548 | if (year != -1) | |
549 | tm->tm_year = r->tm_year; | |
c933b28d | 550 | return 0; |
89967023 | 551 | } |
c933b28d | 552 | return -1; |
198b0fb6 | 553 | } |
ecee9d9e | 554 | |
4f89f4fc ĐTCD |
555 | static int set_time(long hour, long minute, long second, struct tm *tm) |
556 | { | |
557 | /* We accept 61st second because of leap second */ | |
558 | if (0 <= hour && hour <= 24 && | |
559 | 0 <= minute && minute < 60 && | |
560 | 0 <= second && second <= 60) { | |
561 | tm->tm_hour = hour; | |
562 | tm->tm_min = minute; | |
563 | tm->tm_sec = second; | |
564 | return 0; | |
565 | } | |
566 | return -1; | |
567 | } | |
568 | ||
b784840c ĐTCD |
569 | static int is_date_known(struct tm *tm) |
570 | { | |
571 | return tm->tm_year != -1 && tm->tm_mon != -1 && tm->tm_mday != -1; | |
572 | } | |
573 | ||
dddbad72 | 574 | static int match_multi_number(timestamp_t num, char c, const char *date, |
073281e2 | 575 | char *end, struct tm *tm, time_t now) |
198b0fb6 | 576 | { |
38035cf4 JH |
577 | struct tm now_tm; |
578 | struct tm *refuse_future; | |
198b0fb6 LT |
579 | long num2, num3; |
580 | ||
581 | num2 = strtol(end+1, &end, 10); | |
582 | num3 = -1; | |
583 | if (*end == c && isdigit(end[1])) | |
584 | num3 = strtol(end+1, &end, 10); | |
585 | ||
586 | /* Time? Date? */ | |
89967023 | 587 | switch (c) { |
198b0fb6 LT |
588 | case ':': |
589 | if (num3 < 0) | |
590 | num3 = 0; | |
4f89f4fc | 591 | if (set_time(num, num2, num3, tm) == 0) { |
b784840c ĐTCD |
592 | /* |
593 | * If %H:%M:%S was just parsed followed by: .<num4> | |
594 | * Consider (& discard) it as fractional second | |
595 | * if %Y%m%d is parsed before. | |
596 | */ | |
597 | if (*end == '.' && isdigit(end[1]) && is_date_known(tm)) | |
598 | strtol(end + 1, &end, 10); | |
89967023 LT |
599 | break; |
600 | } | |
198b0fb6 | 601 | return 0; |
89967023 LT |
602 | |
603 | case '-': | |
604 | case '/': | |
38035cf4 | 605 | case '.': |
073281e2 JK |
606 | if (!now) |
607 | now = time(NULL); | |
38035cf4 JH |
608 | refuse_future = NULL; |
609 | if (gmtime_r(&now, &now_tm)) | |
610 | refuse_future = &now_tm; | |
611 | ||
198b0fb6 LT |
612 | if (num > 70) { |
613 | /* yyyy-mm-dd? */ | |
c933b28d | 614 | if (set_date(num, num2, num3, NULL, now, tm) == 0) |
198b0fb6 LT |
615 | break; |
616 | /* yyyy-dd-mm? */ | |
c933b28d | 617 | if (set_date(num, num3, num2, NULL, now, tm) == 0) |
89967023 | 618 | break; |
198b0fb6 | 619 | } |
38035cf4 JH |
620 | /* Our eastern European friends say dd.mm.yy[yy] |
621 | * is the norm there, so giving precedence to | |
622 | * mm/dd/yy[yy] form only when separator is not '.' | |
623 | */ | |
624 | if (c != '.' && | |
c933b28d | 625 | set_date(num3, num, num2, refuse_future, now, tm) == 0) |
38035cf4 JH |
626 | break; |
627 | /* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */ | |
c933b28d | 628 | if (set_date(num3, num2, num, refuse_future, now, tm) == 0) |
89967023 | 629 | break; |
38035cf4 JH |
630 | /* Funny European mm.dd.yy */ |
631 | if (c == '.' && | |
c933b28d | 632 | set_date(num3, num, num2, refuse_future, now, tm) == 0) |
198b0fb6 LT |
633 | break; |
634 | return 0; | |
635 | } | |
636 | return end - date; | |
637 | } | |
638 | ||
36e4986f LT |
639 | /* |
640 | * Have we filled in any part of the time/date yet? | |
641 | * We just do a binary 'and' to see if the sign bit | |
642 | * is set in all the values. | |
643 | */ | |
9f2b6d29 LT |
644 | static inline int nodate(struct tm *tm) |
645 | { | |
36e4986f LT |
646 | return (tm->tm_year & |
647 | tm->tm_mon & | |
648 | tm->tm_mday & | |
649 | tm->tm_hour & | |
650 | tm->tm_min & | |
651 | tm->tm_sec) < 0; | |
9f2b6d29 LT |
652 | } |
653 | ||
b56be499 ĐTCD |
654 | /* |
655 | * Have we seen an ISO-8601-alike date, i.e. 20220101T0, | |
656 | * In which, hour is still unset, | |
657 | * and minutes and second has been set to 0. | |
658 | */ | |
659 | static inline int maybeiso8601(struct tm *tm) | |
660 | { | |
661 | return tm->tm_hour == -1 && | |
662 | tm->tm_min == 0 && | |
663 | tm->tm_sec == 0; | |
664 | } | |
665 | ||
198b0fb6 | 666 | /* |
a6080a0a | 667 | * We've seen a digit. Time? Year? Date? |
198b0fb6 | 668 | */ |
26a2d8ae | 669 | static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt) |
198b0fb6 LT |
670 | { |
671 | int n; | |
672 | char *end; | |
dddbad72 | 673 | timestamp_t num; |
198b0fb6 | 674 | |
1aeb7e75 | 675 | num = parse_timestamp(date, &end, 10); |
198b0fb6 LT |
676 | |
677 | /* | |
a1a5a634 JS |
678 | * Seconds since 1970? We trigger on that for any numbers with |
679 | * more than 8 digits. This is because we don't want to rule out | |
680 | * numbers like 20070606 as a YYYYMMDD date. | |
198b0fb6 | 681 | */ |
9f2b6d29 | 682 | if (num >= 100000000 && nodate(tm)) { |
198b0fb6 | 683 | time_t time = num; |
9cb480f2 JH |
684 | if (gmtime_r(&time, tm)) { |
685 | *tm_gmt = 1; | |
198b0fb6 | 686 | return end - date; |
9cb480f2 | 687 | } |
198b0fb6 LT |
688 | } |
689 | ||
690 | /* | |
38035cf4 | 691 | * Check for special formats: num[-.:/]num[same]num |
198b0fb6 LT |
692 | */ |
693 | switch (*end) { | |
694 | case ':': | |
38035cf4 | 695 | case '.': |
198b0fb6 LT |
696 | case '/': |
697 | case '-': | |
698 | if (isdigit(end[1])) { | |
073281e2 | 699 | int match = match_multi_number(num, *end, date, end, tm, 0); |
198b0fb6 LT |
700 | if (match) |
701 | return match; | |
89967023 LT |
702 | } |
703 | } | |
198b0fb6 LT |
704 | |
705 | /* | |
706 | * None of the special formats? Try to guess what | |
707 | * the number meant. We use the number of digits | |
708 | * to make a more educated guess.. | |
709 | */ | |
710 | n = 0; | |
711 | do { | |
712 | n++; | |
713 | } while (isdigit(date[n])); | |
714 | ||
544ed961 ĐTCD |
715 | /* 8 digits, compact style of ISO-8601's date: YYYYmmDD */ |
716 | /* 6 digits, compact style of ISO-8601's time: HHMMSS */ | |
717 | if (n == 8 || n == 6) { | |
718 | unsigned int num1 = num / 10000; | |
719 | unsigned int num2 = (num % 10000) / 100; | |
720 | unsigned int num3 = num % 100; | |
721 | if (n == 8) | |
722 | set_date(num1, num2, num3, NULL, time(NULL), tm); | |
723 | else if (n == 6 && set_time(num1, num2, num3, tm) == 0 && | |
724 | *end == '.' && isdigit(end[1])) | |
725 | strtoul(end + 1, &end, 10); | |
726 | return end - date; | |
727 | } | |
728 | ||
b56be499 ĐTCD |
729 | /* reduced precision of ISO-8601's time: HHMM or HH */ |
730 | if (maybeiso8601(tm)) { | |
731 | unsigned int num1 = num; | |
732 | unsigned int num2 = 0; | |
733 | if (n == 4) { | |
734 | num1 = num / 100; | |
735 | num2 = num % 100; | |
736 | } | |
737 | if ((n == 4 || n == 2) && !nodate(tm) && | |
738 | set_time(num1, num2, 0, tm) == 0) | |
739 | return n; | |
740 | /* | |
741 | * We thought this is an ISO-8601 time string, | |
742 | * we set minutes and seconds to 0, | |
743 | * turn out it isn't, rollback the change. | |
744 | */ | |
745 | tm->tm_min = tm->tm_sec = -1; | |
746 | } | |
747 | ||
198b0fb6 LT |
748 | /* Four-digit year or a timezone? */ |
749 | if (n == 4) { | |
7122f82f | 750 | if (num <= 1400 && *offset == -1) { |
198b0fb6 LT |
751 | unsigned int minutes = num % 100; |
752 | unsigned int hours = num / 100; | |
753 | *offset = hours*60 + minutes; | |
754 | } else if (num > 1900 && num < 2100) | |
755 | tm->tm_year = num - 1900; | |
756 | return n; | |
757 | } | |
758 | ||
9f2b6d29 LT |
759 | /* |
760 | * Ignore lots of numerals. We took care of 4-digit years above. | |
761 | * Days or months must be one or two digits. | |
762 | */ | |
763 | if (n > 2) | |
764 | return n; | |
765 | ||
198b0fb6 LT |
766 | /* |
767 | * NOTE! We will give precedence to day-of-month over month or | |
82f9d58a | 768 | * year numbers in the 1-12 range. So 05 is always "mday 5", |
198b0fb6 LT |
769 | * unless we already have a mday.. |
770 | * | |
771 | * IOW, 01 Apr 05 parses as "April 1st, 2005". | |
772 | */ | |
773 | if (num > 0 && num < 32 && tm->tm_mday < 0) { | |
774 | tm->tm_mday = num; | |
775 | return n; | |
776 | } | |
777 | ||
778 | /* Two-digit year? */ | |
779 | if (n == 2 && tm->tm_year < 0) { | |
780 | if (num < 10 && tm->tm_mday >= 0) { | |
781 | tm->tm_year = num + 100; | |
782 | return n; | |
783 | } | |
784 | if (num >= 70) { | |
785 | tm->tm_year = num; | |
786 | return n; | |
787 | } | |
788 | } | |
789 | ||
90290552 | 790 | if (num > 0 && num < 13 && tm->tm_mon < 0) |
198b0fb6 | 791 | tm->tm_mon = num-1; |
a6080a0a | 792 | |
198b0fb6 | 793 | return n; |
89967023 | 794 | } |
ecee9d9e | 795 | |
26a2d8ae | 796 | static int match_tz(const char *date, int *offp) |
89967023 LT |
797 | { |
798 | char *end; | |
ee646eb4 HL |
799 | int hour = strtoul(date + 1, &end, 10); |
800 | int n = end - (date + 1); | |
801 | int min = 0; | |
ecee9d9e | 802 | |
ee646eb4 HL |
803 | if (n == 4) { |
804 | /* hhmm */ | |
805 | min = hour % 100; | |
806 | hour = hour / 100; | |
807 | } else if (n != 2) { | |
808 | min = 99; /* random crap */ | |
809 | } else if (*end == ':') { | |
810 | /* hh:mm? */ | |
811 | min = strtoul(end + 1, &end, 10); | |
812 | if (end - (date + 1) != 5) | |
813 | min = 99; /* random crap */ | |
814 | } /* otherwise we parsed "hh" */ | |
ecee9d9e | 815 | |
198b0fb6 | 816 | /* |
ee646eb4 HL |
817 | * Don't accept any random crap. Even though some places have |
818 | * offset larger than 12 hours (e.g. Pacific/Kiritimati is at | |
819 | * UTC+14), there is something wrong if hour part is much | |
820 | * larger than that. We might also want to check that the | |
821 | * minutes are divisible by 15 or something too. (Offset of | |
822 | * Kathmandu, Nepal is UTC+5:45) | |
198b0fb6 | 823 | */ |
ee646eb4 HL |
824 | if (min < 60 && hour < 24) { |
825 | int offset = hour * 60 + min; | |
68849b54 LT |
826 | if (*date == '-') |
827 | offset = -offset; | |
68849b54 LT |
828 | *offp = offset; |
829 | } | |
89967023 LT |
830 | return end - date; |
831 | } | |
ecee9d9e | 832 | |
dddbad72 | 833 | static void date_string(timestamp_t date, int offset, struct strbuf *buf) |
01c6ad29 LT |
834 | { |
835 | int sign = '+'; | |
836 | ||
837 | if (offset < 0) { | |
838 | offset = -offset; | |
839 | sign = '-'; | |
840 | } | |
cb71f8bd | 841 | strbuf_addf(buf, "%"PRItime" %c%02d%02d", date, sign, offset / 60, offset % 60); |
01c6ad29 LT |
842 | } |
843 | ||
116eb3ab JH |
844 | /* |
845 | * Parse a string like "0 +0000" as ancient timestamp near epoch, but | |
846 | * only when it appears not as part of any other string. | |
847 | */ | |
dddbad72 | 848 | static int match_object_header_date(const char *date, timestamp_t *timestamp, int *offset) |
116eb3ab JH |
849 | { |
850 | char *end; | |
dddbad72 | 851 | timestamp_t stamp; |
116eb3ab JH |
852 | int ofs; |
853 | ||
be21d167 | 854 | if (*date < '0' || '9' < *date) |
116eb3ab | 855 | return -1; |
1aeb7e75 | 856 | stamp = parse_timestamp(date, &end, 10); |
dddbad72 | 857 | if (*end != ' ' || stamp == TIME_MAX || (end[1] != '+' && end[1] != '-')) |
116eb3ab JH |
858 | return -1; |
859 | date = end + 2; | |
860 | ofs = strtol(date, &end, 10); | |
861 | if ((*end != '\0' && (*end != '\n')) || end != date + 4) | |
862 | return -1; | |
863 | ofs = (ofs / 100) * 60 + (ofs % 100); | |
864 | if (date[-1] == '-') | |
865 | ofs = -ofs; | |
866 | *timestamp = stamp; | |
867 | *offset = ofs; | |
868 | return 0; | |
869 | } | |
870 | ||
89967023 LT |
871 | /* Gr. strptime is crap for this; it doesn't have a way to require RFC2822 |
872 | (i.e. English) day/month names, and it doesn't work correctly with %z. */ | |
dddbad72 | 873 | int parse_date_basic(const char *date, timestamp_t *timestamp, int *offset) |
89967023 LT |
874 | { |
875 | struct tm tm; | |
c5043cc1 | 876 | int tm_gmt; |
dddbad72 | 877 | timestamp_t dummy_timestamp; |
c5043cc1 RR |
878 | int dummy_offset; |
879 | ||
880 | if (!timestamp) | |
881 | timestamp = &dummy_timestamp; | |
882 | if (!offset) | |
883 | offset = &dummy_offset; | |
ecee9d9e | 884 | |
89967023 LT |
885 | memset(&tm, 0, sizeof(tm)); |
886 | tm.tm_year = -1; | |
887 | tm.tm_mon = -1; | |
888 | tm.tm_mday = -1; | |
eaa85129 | 889 | tm.tm_isdst = -1; |
36e4986f LT |
890 | tm.tm_hour = -1; |
891 | tm.tm_min = -1; | |
892 | tm.tm_sec = -1; | |
c5043cc1 | 893 | *offset = -1; |
9cb480f2 | 894 | tm_gmt = 0; |
89967023 | 895 | |
2c733fb2 JH |
896 | if (*date == '@' && |
897 | !match_object_header_date(date + 1, timestamp, offset)) | |
116eb3ab | 898 | return 0; /* success */ |
89967023 LT |
899 | for (;;) { |
900 | int match = 0; | |
901 | unsigned char c = *date; | |
902 | ||
903 | /* Stop at end of string or newline */ | |
904 | if (!c || c == '\n') | |
905 | break; | |
906 | ||
907 | if (isalpha(c)) | |
c5043cc1 | 908 | match = match_alpha(date, &tm, offset); |
89967023 | 909 | else if (isdigit(c)) |
c5043cc1 | 910 | match = match_digit(date, &tm, offset, &tm_gmt); |
89967023 | 911 | else if ((c == '-' || c == '+') && isdigit(date[1])) |
c5043cc1 | 912 | match = match_tz(date, offset); |
89967023 LT |
913 | |
914 | if (!match) { | |
915 | /* BAD CRAP */ | |
916 | match = 1; | |
a6080a0a | 917 | } |
89967023 LT |
918 | |
919 | date += match; | |
920 | } | |
ecee9d9e | 921 | |
f6e63621 | 922 | /* do not use mktime(), which uses local timezone, here */ |
c5043cc1 | 923 | *timestamp = tm_to_time_t(&tm); |
7fcec48d JH |
924 | if (*timestamp == -1) |
925 | return -1; | |
926 | ||
e1033da6 | 927 | if (*offset == -1) { |
f6e63621 JH |
928 | time_t temp_time; |
929 | ||
930 | /* gmtime_r() in match_digit() may have clobbered it */ | |
931 | tm.tm_isdst = -1; | |
932 | temp_time = mktime(&tm); | |
e1033da6 MG |
933 | if ((time_t)*timestamp > temp_time) { |
934 | *offset = ((time_t)*timestamp - temp_time) / 60; | |
935 | } else { | |
936 | *offset = -(int)((temp_time - (time_t)*timestamp) / 60); | |
937 | } | |
938 | } | |
eaa85129 | 939 | |
9cb480f2 | 940 | if (!tm_gmt) |
c5043cc1 | 941 | *timestamp -= *offset * 60; |
9644c061 | 942 | return 0; /* success */ |
c5043cc1 RR |
943 | } |
944 | ||
dddbad72 | 945 | int parse_expiry_date(const char *date, timestamp_t *timestamp) |
3d27b9b0 JH |
946 | { |
947 | int errors = 0; | |
948 | ||
949 | if (!strcmp(date, "never") || !strcmp(date, "false")) | |
950 | *timestamp = 0; | |
951 | else if (!strcmp(date, "all") || !strcmp(date, "now")) | |
952 | /* | |
953 | * We take over "now" here, which usually translates | |
954 | * to the current timestamp. This is because the user | |
0e20b229 | 955 | * really means to expire everything that was done in |
3d27b9b0 JH |
956 | * the past, and by definition reflogs are the record |
957 | * of the past, and there is nothing from the future | |
958 | * to be kept. | |
959 | */ | |
dddbad72 | 960 | *timestamp = TIME_MAX; |
3d27b9b0 JH |
961 | else |
962 | *timestamp = approxidate_careful(date, &errors); | |
963 | ||
964 | return errors; | |
965 | } | |
966 | ||
c33ddc2e | 967 | int parse_date(const char *date, struct strbuf *result) |
c5043cc1 | 968 | { |
dddbad72 | 969 | timestamp_t timestamp; |
c5043cc1 | 970 | int offset; |
9644c061 | 971 | if (parse_date_basic(date, ×tamp, &offset)) |
c5043cc1 | 972 | return -1; |
c33ddc2e JK |
973 | date_string(timestamp, offset, result); |
974 | return 0; | |
ecee9d9e ET |
975 | } |
976 | ||
add00ba2 JK |
977 | static enum date_mode_type parse_date_type(const char *format, const char **end) |
978 | { | |
979 | if (skip_prefix(format, "relative", end)) | |
980 | return DATE_RELATIVE; | |
981 | if (skip_prefix(format, "iso8601-strict", end) || | |
982 | skip_prefix(format, "iso-strict", end)) | |
983 | return DATE_ISO8601_STRICT; | |
984 | if (skip_prefix(format, "iso8601", end) || | |
985 | skip_prefix(format, "iso", end)) | |
986 | return DATE_ISO8601; | |
987 | if (skip_prefix(format, "rfc2822", end) || | |
988 | skip_prefix(format, "rfc", end)) | |
989 | return DATE_RFC2822; | |
990 | if (skip_prefix(format, "short", end)) | |
991 | return DATE_SHORT; | |
992 | if (skip_prefix(format, "default", end)) | |
993 | return DATE_NORMAL; | |
acdd3776 LT |
994 | if (skip_prefix(format, "human", end)) |
995 | return DATE_HUMAN; | |
add00ba2 JK |
996 | if (skip_prefix(format, "raw", end)) |
997 | return DATE_RAW; | |
642833db JK |
998 | if (skip_prefix(format, "unix", end)) |
999 | return DATE_UNIX; | |
add00ba2 JK |
1000 | if (skip_prefix(format, "format", end)) |
1001 | return DATE_STRFTIME; | |
5a59a230 NTND |
1002 | /* |
1003 | * Please update $__git_log_date_formats in | |
1004 | * git-completion.bash when you add new formats. | |
1005 | */ | |
add00ba2 JK |
1006 | |
1007 | die("unknown date format %s", format); | |
1008 | } | |
1009 | ||
a5481a6c | 1010 | void parse_date_format(const char *format, struct date_mode *mode) |
856665f8 | 1011 | { |
add00ba2 JK |
1012 | const char *p; |
1013 | ||
2fd7c229 SS |
1014 | /* "auto:foo" is "if tty/pager, then foo, otherwise normal" */ |
1015 | if (skip_prefix(format, "auto:", &p)) { | |
1016 | if (isatty(1) || pager_in_use()) | |
1017 | format = p; | |
1018 | else | |
1019 | format = "default"; | |
1020 | } | |
1021 | ||
add00ba2 JK |
1022 | /* historical alias */ |
1023 | if (!strcmp(format, "local")) | |
1024 | format = "default-local"; | |
1025 | ||
1026 | mode->type = parse_date_type(format, &p); | |
1027 | mode->local = 0; | |
1028 | ||
1029 | if (skip_prefix(p, "-local", &p)) | |
1030 | mode->local = 1; | |
1031 | ||
1032 | if (mode->type == DATE_STRFTIME) { | |
1033 | if (!skip_prefix(p, ":", &p)) | |
1034 | die("date format missing colon separator: %s", format); | |
1035 | mode->strftime_fmt = xstrdup(p); | |
1036 | } else if (*p) | |
856665f8 AP |
1037 | die("unknown date format %s", format); |
1038 | } | |
1039 | ||
974c919d ÆAB |
1040 | void date_mode_release(struct date_mode *mode) |
1041 | { | |
1042 | free((char *)mode->strftime_fmt); | |
1043 | } | |
1044 | ||
c33ddc2e | 1045 | void datestamp(struct strbuf *out) |
ecee9d9e ET |
1046 | { |
1047 | time_t now; | |
1048 | int offset; | |
ccd46945 | 1049 | struct tm tm = { 0 }; |
ecee9d9e ET |
1050 | |
1051 | time(&now); | |
1052 | ||
ccd46945 | 1053 | offset = tm_to_time_t(localtime_r(&now, &tm)) - now; |
ecee9d9e ET |
1054 | offset /= 60; |
1055 | ||
c33ddc2e | 1056 | date_string(now, offset, out); |
ecee9d9e | 1057 | } |
3c07b1d1 | 1058 | |
90290552 LT |
1059 | /* |
1060 | * Relative time update (eg "2 days ago"). If we haven't set the time | |
1061 | * yet, we need to set it from current time. | |
1062 | */ | |
dddbad72 | 1063 | static time_t update_tm(struct tm *tm, struct tm *now, time_t sec) |
3c07b1d1 | 1064 | { |
90290552 LT |
1065 | time_t n; |
1066 | ||
1067 | if (tm->tm_mday < 0) | |
1068 | tm->tm_mday = now->tm_mday; | |
1069 | if (tm->tm_mon < 0) | |
1070 | tm->tm_mon = now->tm_mon; | |
1071 | if (tm->tm_year < 0) { | |
1072 | tm->tm_year = now->tm_year; | |
1073 | if (tm->tm_mon > now->tm_mon) | |
1074 | tm->tm_year--; | |
1075 | } | |
1076 | ||
1077 | n = mktime(tm) - sec; | |
3c07b1d1 | 1078 | localtime_r(&n, tm); |
90290552 | 1079 | return n; |
3c07b1d1 LT |
1080 | } |
1081 | ||
c27cc94f JK |
1082 | /* |
1083 | * Do we have a pending number at the end, or when | |
1084 | * we see a new one? Let's assume it's a month day, | |
1085 | * as in "Dec 6, 1992" | |
1086 | */ | |
1087 | static void pending_number(struct tm *tm, int *num) | |
1088 | { | |
1089 | int number = *num; | |
1090 | ||
1091 | if (number) { | |
1092 | *num = 0; | |
1093 | if (tm->tm_mday < 0 && number < 32) | |
1094 | tm->tm_mday = number; | |
1095 | else if (tm->tm_mon < 0 && number < 13) | |
1096 | tm->tm_mon = number-1; | |
1097 | else if (tm->tm_year < 0) { | |
1098 | if (number > 1969 && number < 2100) | |
1099 | tm->tm_year = number - 1900; | |
1100 | else if (number > 69 && number < 100) | |
1101 | tm->tm_year = number; | |
1102 | else if (number < 38) | |
1103 | tm->tm_year = 100 + number; | |
1104 | /* We screw up for number = 00 ? */ | |
1105 | } | |
1106 | } | |
1107 | } | |
1108 | ||
93cfa7c7 JH |
1109 | static void date_now(struct tm *tm, struct tm *now, int *num) |
1110 | { | |
c27cc94f | 1111 | *num = 0; |
93cfa7c7 JH |
1112 | update_tm(tm, now, 0); |
1113 | } | |
1114 | ||
90290552 | 1115 | static void date_yesterday(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 1116 | { |
c27cc94f | 1117 | *num = 0; |
90290552 | 1118 | update_tm(tm, now, 24*60*60); |
a8aca418 LT |
1119 | } |
1120 | ||
90290552 | 1121 | static void date_time(struct tm *tm, struct tm *now, int hour) |
a8aca418 LT |
1122 | { |
1123 | if (tm->tm_hour < hour) | |
aa097b88 | 1124 | update_tm(tm, now, 24*60*60); |
a8aca418 LT |
1125 | tm->tm_hour = hour; |
1126 | tm->tm_min = 0; | |
1127 | tm->tm_sec = 0; | |
1128 | } | |
1129 | ||
90290552 | 1130 | static void date_midnight(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 1131 | { |
c27cc94f | 1132 | pending_number(tm, num); |
90290552 | 1133 | date_time(tm, now, 0); |
a8aca418 LT |
1134 | } |
1135 | ||
90290552 | 1136 | static void date_noon(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 1137 | { |
c27cc94f | 1138 | pending_number(tm, num); |
90290552 | 1139 | date_time(tm, now, 12); |
a8aca418 LT |
1140 | } |
1141 | ||
90290552 | 1142 | static void date_tea(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 1143 | { |
c27cc94f | 1144 | pending_number(tm, num); |
90290552 | 1145 | date_time(tm, now, 17); |
a8aca418 LT |
1146 | } |
1147 | ||
7829746a | 1148 | static void date_pm(struct tm *tm, struct tm *now UNUSED, int *num) |
393d340e | 1149 | { |
18b633ca | 1150 | int hour, n = *num; |
393d340e LT |
1151 | *num = 0; |
1152 | ||
18b633ca LT |
1153 | hour = tm->tm_hour; |
1154 | if (n) { | |
1155 | hour = n; | |
393d340e LT |
1156 | tm->tm_min = 0; |
1157 | tm->tm_sec = 0; | |
1158 | } | |
18b633ca | 1159 | tm->tm_hour = (hour % 12) + 12; |
393d340e LT |
1160 | } |
1161 | ||
7829746a | 1162 | static void date_am(struct tm *tm, struct tm *now UNUSED, int *num) |
393d340e | 1163 | { |
18b633ca | 1164 | int hour, n = *num; |
393d340e LT |
1165 | *num = 0; |
1166 | ||
18b633ca LT |
1167 | hour = tm->tm_hour; |
1168 | if (n) { | |
1169 | hour = n; | |
393d340e LT |
1170 | tm->tm_min = 0; |
1171 | tm->tm_sec = 0; | |
1172 | } | |
18b633ca | 1173 | tm->tm_hour = (hour % 12); |
393d340e LT |
1174 | } |
1175 | ||
7829746a | 1176 | static void date_never(struct tm *tm, struct tm *now UNUSED, int *num) |
af66366a | 1177 | { |
8c6b5786 OM |
1178 | time_t n = 0; |
1179 | localtime_r(&n, tm); | |
c27cc94f | 1180 | *num = 0; |
af66366a JS |
1181 | } |
1182 | ||
a8aca418 LT |
1183 | static const struct special { |
1184 | const char *name; | |
90290552 | 1185 | void (*fn)(struct tm *, struct tm *, int *); |
a8aca418 LT |
1186 | } special[] = { |
1187 | { "yesterday", date_yesterday }, | |
1188 | { "noon", date_noon }, | |
1189 | { "midnight", date_midnight }, | |
1190 | { "tea", date_tea }, | |
393d340e LT |
1191 | { "PM", date_pm }, |
1192 | { "AM", date_am }, | |
af66366a | 1193 | { "never", date_never }, |
93cfa7c7 | 1194 | { "now", date_now }, |
a8aca418 LT |
1195 | { NULL } |
1196 | }; | |
1197 | ||
3c07b1d1 LT |
1198 | static const char *number_name[] = { |
1199 | "zero", "one", "two", "three", "four", | |
1200 | "five", "six", "seven", "eight", "nine", "ten", | |
1201 | }; | |
1202 | ||
a8aca418 | 1203 | static const struct typelen { |
3c07b1d1 LT |
1204 | const char *type; |
1205 | int length; | |
1206 | } typelen[] = { | |
1207 | { "seconds", 1 }, | |
1208 | { "minutes", 60 }, | |
1209 | { "hours", 60*60 }, | |
1210 | { "days", 24*60*60 }, | |
1211 | { "weeks", 7*24*60*60 }, | |
1212 | { NULL } | |
a6080a0a | 1213 | }; |
3c07b1d1 | 1214 | |
93cfa7c7 | 1215 | static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm *now, int *num, int *touched) |
3c07b1d1 | 1216 | { |
a8aca418 LT |
1217 | const struct typelen *tl; |
1218 | const struct special *s; | |
3c07b1d1 | 1219 | const char *end = date; |
5df7dbba | 1220 | int i; |
3c07b1d1 | 1221 | |
38db01b7 | 1222 | while (isalpha(*++end)) |
5df7dbba | 1223 | ; |
3c07b1d1 LT |
1224 | |
1225 | for (i = 0; i < 12; i++) { | |
1226 | int match = match_string(date, month_names[i]); | |
1227 | if (match >= 3) { | |
1228 | tm->tm_mon = i; | |
93cfa7c7 | 1229 | *touched = 1; |
3c07b1d1 LT |
1230 | return end; |
1231 | } | |
1232 | } | |
1233 | ||
a8aca418 LT |
1234 | for (s = special; s->name; s++) { |
1235 | int len = strlen(s->name); | |
1236 | if (match_string(date, s->name) == len) { | |
90290552 | 1237 | s->fn(tm, now, num); |
93cfa7c7 | 1238 | *touched = 1; |
a8aca418 LT |
1239 | return end; |
1240 | } | |
3c07b1d1 LT |
1241 | } |
1242 | ||
1243 | if (!*num) { | |
1244 | for (i = 1; i < 11; i++) { | |
1245 | int len = strlen(number_name[i]); | |
1246 | if (match_string(date, number_name[i]) == len) { | |
1247 | *num = i; | |
93cfa7c7 | 1248 | *touched = 1; |
3c07b1d1 LT |
1249 | return end; |
1250 | } | |
1251 | } | |
93cfa7c7 | 1252 | if (match_string(date, "last") == 4) { |
3c07b1d1 | 1253 | *num = 1; |
93cfa7c7 JH |
1254 | *touched = 1; |
1255 | } | |
3c07b1d1 LT |
1256 | return end; |
1257 | } | |
1258 | ||
1259 | tl = typelen; | |
1260 | while (tl->type) { | |
1261 | int len = strlen(tl->type); | |
1262 | if (match_string(date, tl->type) >= len-1) { | |
90290552 | 1263 | update_tm(tm, now, tl->length * *num); |
3c07b1d1 | 1264 | *num = 0; |
93cfa7c7 | 1265 | *touched = 1; |
3c07b1d1 LT |
1266 | return end; |
1267 | } | |
1268 | tl++; | |
1269 | } | |
1270 | ||
6b7b0427 LT |
1271 | for (i = 0; i < 7; i++) { |
1272 | int match = match_string(date, weekday_names[i]); | |
1273 | if (match >= 3) { | |
1274 | int diff, n = *num -1; | |
1275 | *num = 0; | |
1276 | ||
1277 | diff = tm->tm_wday - i; | |
1278 | if (diff <= 0) | |
1279 | n++; | |
1280 | diff += 7*n; | |
1281 | ||
90290552 | 1282 | update_tm(tm, now, diff * 24 * 60 * 60); |
93cfa7c7 | 1283 | *touched = 1; |
6b7b0427 LT |
1284 | return end; |
1285 | } | |
1286 | } | |
1287 | ||
3c07b1d1 | 1288 | if (match_string(date, "months") >= 5) { |
931e8e27 JK |
1289 | int n; |
1290 | update_tm(tm, now, 0); /* fill in date fields if needed */ | |
1291 | n = tm->tm_mon - *num; | |
3c07b1d1 LT |
1292 | *num = 0; |
1293 | while (n < 0) { | |
1294 | n += 12; | |
1295 | tm->tm_year--; | |
1296 | } | |
1297 | tm->tm_mon = n; | |
93cfa7c7 | 1298 | *touched = 1; |
3c07b1d1 LT |
1299 | return end; |
1300 | } | |
1301 | ||
1302 | if (match_string(date, "years") >= 4) { | |
931e8e27 | 1303 | update_tm(tm, now, 0); /* fill in date fields if needed */ |
3c07b1d1 LT |
1304 | tm->tm_year -= *num; |
1305 | *num = 0; | |
93cfa7c7 | 1306 | *touched = 1; |
3c07b1d1 LT |
1307 | return end; |
1308 | } | |
1309 | ||
1310 | return end; | |
1311 | } | |
1312 | ||
073281e2 JK |
1313 | static const char *approxidate_digit(const char *date, struct tm *tm, int *num, |
1314 | time_t now) | |
e92a54d9 LT |
1315 | { |
1316 | char *end; | |
dddbad72 | 1317 | timestamp_t number = parse_timestamp(date, &end, 10); |
e92a54d9 | 1318 | |
393d340e LT |
1319 | switch (*end) { |
1320 | case ':': | |
1321 | case '.': | |
1322 | case '/': | |
1323 | case '-': | |
1324 | if (isdigit(end[1])) { | |
073281e2 JK |
1325 | int match = match_multi_number(number, *end, date, end, |
1326 | tm, now); | |
393d340e LT |
1327 | if (match) |
1328 | return date + match; | |
1329 | } | |
1330 | } | |
1331 | ||
9f2b6d29 LT |
1332 | /* Accept zero-padding only for small numbers ("Dec 02", never "Dec 0002") */ |
1333 | if (date[0] != '0' || end - date <= 2) | |
1334 | *num = number; | |
e92a54d9 LT |
1335 | return end; |
1336 | } | |
1337 | ||
dddbad72 JS |
1338 | static timestamp_t approxidate_str(const char *date, |
1339 | const struct timeval *tv, | |
1340 | int *error_ret) | |
3c07b1d1 LT |
1341 | { |
1342 | int number = 0; | |
93cfa7c7 | 1343 | int touched = 0; |
3c07b1d1 | 1344 | struct tm tm, now; |
f697b33b | 1345 | time_t time_sec; |
3c07b1d1 | 1346 | |
33012fc4 | 1347 | time_sec = tv->tv_sec; |
f697b33b | 1348 | localtime_r(&time_sec, &tm); |
3c07b1d1 | 1349 | now = tm; |
90290552 LT |
1350 | |
1351 | tm.tm_year = -1; | |
1352 | tm.tm_mon = -1; | |
1353 | tm.tm_mday = -1; | |
1354 | ||
3c07b1d1 LT |
1355 | for (;;) { |
1356 | unsigned char c = *date; | |
1357 | if (!c) | |
1358 | break; | |
1359 | date++; | |
1360 | if (isdigit(c)) { | |
90290552 | 1361 | pending_number(&tm, &number); |
073281e2 | 1362 | date = approxidate_digit(date-1, &tm, &number, time_sec); |
93cfa7c7 | 1363 | touched = 1; |
3c07b1d1 LT |
1364 | continue; |
1365 | } | |
1366 | if (isalpha(c)) | |
93cfa7c7 | 1367 | date = approxidate_alpha(date-1, &tm, &now, &number, &touched); |
3c07b1d1 | 1368 | } |
90290552 | 1369 | pending_number(&tm, &number); |
93cfa7c7 JH |
1370 | if (!touched) |
1371 | *error_ret = 1; | |
dddbad72 | 1372 | return (timestamp_t)update_tm(&tm, &now, 0); |
3c07b1d1 | 1373 | } |
33012fc4 | 1374 | |
dddbad72 | 1375 | timestamp_t approxidate_careful(const char *date, int *error_ret) |
33012fc4 AR |
1376 | { |
1377 | struct timeval tv; | |
dddbad72 | 1378 | timestamp_t timestamp; |
c5043cc1 | 1379 | int offset; |
93cfa7c7 JH |
1380 | int dummy = 0; |
1381 | if (!error_ret) | |
1382 | error_ret = &dummy; | |
33012fc4 | 1383 | |
9644c061 | 1384 | if (!parse_date_basic(date, ×tamp, &offset)) { |
93cfa7c7 | 1385 | *error_ret = 0; |
c5043cc1 | 1386 | return timestamp; |
93cfa7c7 | 1387 | } |
33012fc4 | 1388 | |
b841d4ff | 1389 | get_time(&tv); |
93cfa7c7 | 1390 | return approxidate_str(date, &tv, error_ret); |
33012fc4 | 1391 | } |
7ca36d93 | 1392 | |
dddbad72 | 1393 | int date_overflows(timestamp_t t) |
7ca36d93 JK |
1394 | { |
1395 | time_t sys; | |
1396 | ||
dddbad72 JS |
1397 | /* If we overflowed our timestamp data type, that's bad... */ |
1398 | if ((uintmax_t)t >= TIME_MAX) | |
7ca36d93 JK |
1399 | return 1; |
1400 | ||
1401 | /* | |
1402 | * ...but we also are going to feed the result to system | |
1403 | * functions that expect time_t, which is often "signed long". | |
1404 | * Make sure that we fit into time_t, as well. | |
1405 | */ | |
1406 | sys = t; | |
1407 | return t != sys || (t < 1) != (sys < 1); | |
1408 | } |