]>
Commit | Line | Data |
---|---|---|
ecee9d9e ET |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
6 | ||
e99d59ff LT |
7 | #include "cache.h" |
8 | ||
bb5799d6 JS |
9 | /* |
10 | * This is like mktime, but without normalization of tm_wday and tm_yday. | |
11 | */ | |
23418ea9 | 12 | static time_t tm_to_time_t(const struct tm *tm) |
ecee9d9e ET |
13 | { |
14 | static const int mdays[] = { | |
15 | 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 | |
16 | }; | |
17 | int year = tm->tm_year - 70; | |
18 | int month = tm->tm_mon; | |
19 | int day = tm->tm_mday; | |
20 | ||
21 | if (year < 0 || year > 129) /* algo only works for 1970-2099 */ | |
22 | return -1; | |
23 | if (month < 0 || month > 11) /* array bounds */ | |
24 | return -1; | |
25 | if (month < 2 || (year + 2) % 4) | |
26 | day--; | |
36e4986f LT |
27 | if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_sec < 0) |
28 | return -1; | |
ecee9d9e ET |
29 | return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24*60*60UL + |
30 | tm->tm_hour * 60*60 + tm->tm_min * 60 + tm->tm_sec; | |
31 | } | |
32 | ||
33 | static const char *month_names[] = { | |
89967023 LT |
34 | "January", "February", "March", "April", "May", "June", |
35 | "July", "August", "September", "October", "November", "December" | |
ecee9d9e ET |
36 | }; |
37 | ||
38 | static const char *weekday_names[] = { | |
6b7b0427 | 39 | "Sundays", "Mondays", "Tuesdays", "Wednesdays", "Thursdays", "Fridays", "Saturdays" |
ecee9d9e ET |
40 | }; |
41 | ||
9a8e35e9 LT |
42 | static time_t gm_time_t(unsigned long time, int tz) |
43 | { | |
44 | int minutes; | |
45 | ||
46 | minutes = tz < 0 ? -tz : tz; | |
47 | minutes = (minutes / 100)*60 + (minutes % 100); | |
48 | minutes = tz < 0 ? -minutes : minutes; | |
49 | return time + minutes * 60; | |
50 | } | |
51 | ||
f80cd783 LT |
52 | /* |
53 | * The "tz" thing is passed in as this strange "decimal parse of tz" | |
54 | * thing, which means that tz -0100 is passed in as the integer -100, | |
55 | * even though it means "sixty minutes off" | |
56 | */ | |
2a387043 | 57 | static struct tm *time_to_tm(unsigned long time, int tz) |
f80cd783 | 58 | { |
9a8e35e9 | 59 | time_t t = gm_time_t(time, tz); |
2a387043 JH |
60 | return gmtime(&t); |
61 | } | |
62 | ||
a7b02ccf JH |
63 | /* |
64 | * What value of "tz" was in effect back then at "time" in the | |
65 | * local timezone? | |
66 | */ | |
67 | static int local_tzoffset(unsigned long time) | |
68 | { | |
69 | time_t t, t_local; | |
70 | struct tm tm; | |
71 | int offset, eastwest; | |
72 | ||
73 | t = time; | |
74 | localtime_r(&t, &tm); | |
bb5799d6 | 75 | t_local = tm_to_time_t(&tm); |
a7b02ccf | 76 | |
bab74837 JK |
77 | if (t_local == -1) |
78 | return 0; /* error; just use +0000 */ | |
a7b02ccf JH |
79 | if (t_local < t) { |
80 | eastwest = -1; | |
81 | offset = t - t_local; | |
82 | } else { | |
83 | eastwest = 1; | |
84 | offset = t_local - t; | |
85 | } | |
86 | offset /= 60; /* in minutes */ | |
87 | offset = (offset % 60) + ((offset / 60) * 100); | |
88 | return offset * eastwest; | |
89 | } | |
90 | ||
7d29afd4 | 91 | void show_date_relative(unsigned long time, int tz, |
33012fc4 | 92 | const struct timeval *now, |
7d29afd4 | 93 | struct strbuf *timebuf) |
33012fc4 AR |
94 | { |
95 | unsigned long diff; | |
7d29afd4 JN |
96 | if (now->tv_sec < time) { |
97 | strbuf_addstr(timebuf, _("in the future")); | |
98 | return; | |
99 | } | |
33012fc4 AR |
100 | diff = now->tv_sec - time; |
101 | if (diff < 90) { | |
7d29afd4 JN |
102 | strbuf_addf(timebuf, |
103 | Q_("%lu second ago", "%lu seconds ago", diff), diff); | |
104 | return; | |
33012fc4 AR |
105 | } |
106 | /* Turn it into minutes */ | |
107 | diff = (diff + 30) / 60; | |
108 | if (diff < 90) { | |
7d29afd4 JN |
109 | strbuf_addf(timebuf, |
110 | Q_("%lu minute ago", "%lu minutes ago", diff), diff); | |
111 | return; | |
33012fc4 AR |
112 | } |
113 | /* Turn it into hours */ | |
114 | diff = (diff + 30) / 60; | |
115 | if (diff < 36) { | |
7d29afd4 JN |
116 | strbuf_addf(timebuf, |
117 | Q_("%lu hour ago", "%lu hours ago", diff), diff); | |
118 | return; | |
33012fc4 AR |
119 | } |
120 | /* We deal with number of days from here on */ | |
121 | diff = (diff + 12) / 24; | |
122 | if (diff < 14) { | |
7d29afd4 JN |
123 | strbuf_addf(timebuf, |
124 | Q_("%lu day ago", "%lu days ago", diff), diff); | |
125 | return; | |
33012fc4 AR |
126 | } |
127 | /* Say weeks for the past 10 weeks or so */ | |
128 | if (diff < 70) { | |
7d29afd4 JN |
129 | strbuf_addf(timebuf, |
130 | Q_("%lu week ago", "%lu weeks ago", (diff + 3) / 7), | |
131 | (diff + 3) / 7); | |
132 | return; | |
33012fc4 AR |
133 | } |
134 | /* Say months for the past 12 months or so */ | |
dbc1b1f7 | 135 | if (diff < 365) { |
7d29afd4 JN |
136 | strbuf_addf(timebuf, |
137 | Q_("%lu month ago", "%lu months ago", (diff + 15) / 30), | |
138 | (diff + 15) / 30); | |
139 | return; | |
33012fc4 AR |
140 | } |
141 | /* Give years and months for 5 years or so */ | |
142 | if (diff < 1825) { | |
f1e9c548 MG |
143 | unsigned long totalmonths = (diff * 12 * 2 + 365) / (365 * 2); |
144 | unsigned long years = totalmonths / 12; | |
145 | unsigned long months = totalmonths % 12; | |
7d29afd4 JN |
146 | if (months) { |
147 | struct strbuf sb = STRBUF_INIT; | |
148 | strbuf_addf(&sb, Q_("%lu year", "%lu years", years), years); | |
7d29afd4 | 149 | strbuf_addf(timebuf, |
fcaed04d | 150 | /* TRANSLATORS: "%s" is "<n> years" */ |
7d29afd4 JN |
151 | Q_("%s, %lu month ago", "%s, %lu months ago", months), |
152 | sb.buf, months); | |
153 | strbuf_release(&sb); | |
154 | } else | |
155 | strbuf_addf(timebuf, | |
156 | Q_("%lu year ago", "%lu years ago", years), years); | |
157 | return; | |
33012fc4 AR |
158 | } |
159 | /* Otherwise, just years. Centuries is probably overkill. */ | |
7d29afd4 JN |
160 | strbuf_addf(timebuf, |
161 | Q_("%lu year ago", "%lu years ago", (diff + 183) / 365), | |
162 | (diff + 183) / 365); | |
33012fc4 AR |
163 | } |
164 | ||
a5481a6c JK |
165 | struct date_mode *date_mode_from_type(enum date_mode_type type) |
166 | { | |
167 | static struct date_mode mode; | |
aa1462cc JK |
168 | if (type == DATE_STRFTIME) |
169 | die("BUG: cannot create anonymous strftime date_mode struct"); | |
a5481a6c | 170 | mode.type = type; |
add00ba2 | 171 | mode.local = 0; |
a5481a6c JK |
172 | return &mode; |
173 | } | |
174 | ||
175 | const char *show_date(unsigned long time, int tz, const struct date_mode *mode) | |
2a387043 JH |
176 | { |
177 | struct tm *tm; | |
7d29afd4 | 178 | static struct strbuf timebuf = STRBUF_INIT; |
2a387043 | 179 | |
642833db JK |
180 | if (mode->type == DATE_UNIX) { |
181 | strbuf_reset(&timebuf); | |
182 | strbuf_addf(&timebuf, "%lu", time); | |
183 | return timebuf.buf; | |
184 | } | |
185 | ||
add00ba2 | 186 | if (mode->local) |
dc6d782c JK |
187 | tz = local_tzoffset(time); |
188 | ||
a5481a6c | 189 | if (mode->type == DATE_RAW) { |
7d29afd4 JN |
190 | strbuf_reset(&timebuf); |
191 | strbuf_addf(&timebuf, "%lu %+05d", time, tz); | |
192 | return timebuf.buf; | |
7dff9b30 LT |
193 | } |
194 | ||
a5481a6c | 195 | if (mode->type == DATE_RELATIVE) { |
9a8e35e9 | 196 | struct timeval now; |
7d29afd4 JN |
197 | |
198 | strbuf_reset(&timebuf); | |
9a8e35e9 | 199 | gettimeofday(&now, NULL); |
7d29afd4 JN |
200 | show_date_relative(time, tz, &now, &timebuf); |
201 | return timebuf.buf; | |
9a8e35e9 LT |
202 | } |
203 | ||
2a387043 | 204 | tm = time_to_tm(time, tz); |
2b15846d JK |
205 | if (!tm) { |
206 | tm = time_to_tm(0, 0); | |
207 | tz = 0; | |
208 | } | |
7d29afd4 JN |
209 | |
210 | strbuf_reset(&timebuf); | |
a5481a6c | 211 | if (mode->type == DATE_SHORT) |
7d29afd4 | 212 | strbuf_addf(&timebuf, "%04d-%02d-%02d", tm->tm_year + 1900, |
f8493ec0 | 213 | tm->tm_mon + 1, tm->tm_mday); |
a5481a6c | 214 | else if (mode->type == DATE_ISO8601) |
7d29afd4 | 215 | strbuf_addf(&timebuf, "%04d-%02d-%02d %02d:%02d:%02d %+05d", |
ee8f838e RR |
216 | tm->tm_year + 1900, |
217 | tm->tm_mon + 1, | |
218 | tm->tm_mday, | |
219 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
220 | tz); | |
a5481a6c | 221 | else if (mode->type == DATE_ISO8601_STRICT) { |
466fb674 BB |
222 | char sign = (tz >= 0) ? '+' : '-'; |
223 | tz = abs(tz); | |
224 | strbuf_addf(&timebuf, "%04d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d", | |
225 | tm->tm_year + 1900, | |
226 | tm->tm_mon + 1, | |
227 | tm->tm_mday, | |
228 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
229 | sign, tz / 100, tz % 100); | |
a5481a6c | 230 | } else if (mode->type == DATE_RFC2822) |
7d29afd4 | 231 | strbuf_addf(&timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d", |
73013afd JH |
232 | weekday_names[tm->tm_wday], tm->tm_mday, |
233 | month_names[tm->tm_mon], tm->tm_year + 1900, | |
234 | tm->tm_hour, tm->tm_min, tm->tm_sec, tz); | |
aa1462cc JK |
235 | else if (mode->type == DATE_STRFTIME) |
236 | strbuf_addftime(&timebuf, mode->strftime_fmt, tm); | |
f8493ec0 | 237 | else |
7d29afd4 | 238 | strbuf_addf(&timebuf, "%.3s %.3s %d %02d:%02d:%02d %d%c%+05d", |
f8493ec0 JS |
239 | weekday_names[tm->tm_wday], |
240 | month_names[tm->tm_mon], | |
241 | tm->tm_mday, | |
242 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
a7b02ccf | 243 | tm->tm_year + 1900, |
add00ba2 | 244 | mode->local ? 0 : ' ', |
a7b02ccf | 245 | tz); |
7d29afd4 | 246 | return timebuf.buf; |
f80cd783 LT |
247 | } |
248 | ||
89967023 LT |
249 | /* |
250 | * Check these. And note how it doesn't do the summer-time conversion. | |
251 | * | |
252 | * In my world, it's always summer, and things are probably a bit off | |
253 | * in other ways too. | |
254 | */ | |
255 | static const struct { | |
256 | const char *name; | |
257 | int offset; | |
5e2a78a4 | 258 | int dst; |
89967023 | 259 | } timezone_names[] = { |
5e2a78a4 LT |
260 | { "IDLW", -12, 0, }, /* International Date Line West */ |
261 | { "NT", -11, 0, }, /* Nome */ | |
262 | { "CAT", -10, 0, }, /* Central Alaska */ | |
263 | { "HST", -10, 0, }, /* Hawaii Standard */ | |
264 | { "HDT", -10, 1, }, /* Hawaii Daylight */ | |
265 | { "YST", -9, 0, }, /* Yukon Standard */ | |
266 | { "YDT", -9, 1, }, /* Yukon Daylight */ | |
267 | { "PST", -8, 0, }, /* Pacific Standard */ | |
268 | { "PDT", -8, 1, }, /* Pacific Daylight */ | |
269 | { "MST", -7, 0, }, /* Mountain Standard */ | |
270 | { "MDT", -7, 1, }, /* Mountain Daylight */ | |
271 | { "CST", -6, 0, }, /* Central Standard */ | |
272 | { "CDT", -6, 1, }, /* Central Daylight */ | |
273 | { "EST", -5, 0, }, /* Eastern Standard */ | |
274 | { "EDT", -5, 1, }, /* Eastern Daylight */ | |
275 | { "AST", -3, 0, }, /* Atlantic Standard */ | |
276 | { "ADT", -3, 1, }, /* Atlantic Daylight */ | |
277 | { "WAT", -1, 0, }, /* West Africa */ | |
278 | ||
279 | { "GMT", 0, 0, }, /* Greenwich Mean */ | |
280 | { "UTC", 0, 0, }, /* Universal (Coordinated) */ | |
75b37e70 | 281 | { "Z", 0, 0, }, /* Zulu, alias for UTC */ |
5e2a78a4 LT |
282 | |
283 | { "WET", 0, 0, }, /* Western European */ | |
284 | { "BST", 0, 1, }, /* British Summer */ | |
285 | { "CET", +1, 0, }, /* Central European */ | |
286 | { "MET", +1, 0, }, /* Middle European */ | |
287 | { "MEWT", +1, 0, }, /* Middle European Winter */ | |
288 | { "MEST", +1, 1, }, /* Middle European Summer */ | |
289 | { "CEST", +1, 1, }, /* Central European Summer */ | |
290 | { "MESZ", +1, 1, }, /* Middle European Summer */ | |
291 | { "FWT", +1, 0, }, /* French Winter */ | |
292 | { "FST", +1, 1, }, /* French Summer */ | |
293 | { "EET", +2, 0, }, /* Eastern Europe, USSR Zone 1 */ | |
92e2311b | 294 | { "EEST", +2, 1, }, /* Eastern European Daylight */ |
5e2a78a4 LT |
295 | { "WAST", +7, 0, }, /* West Australian Standard */ |
296 | { "WADT", +7, 1, }, /* West Australian Daylight */ | |
297 | { "CCT", +8, 0, }, /* China Coast, USSR Zone 7 */ | |
298 | { "JST", +9, 0, }, /* Japan Standard, USSR Zone 8 */ | |
299 | { "EAST", +10, 0, }, /* Eastern Australian Standard */ | |
300 | { "EADT", +10, 1, }, /* Eastern Australian Daylight */ | |
301 | { "GST", +10, 0, }, /* Guam Standard, USSR Zone 9 */ | |
695ed472 SD |
302 | { "NZT", +12, 0, }, /* New Zealand */ |
303 | { "NZST", +12, 0, }, /* New Zealand Standard */ | |
304 | { "NZDT", +12, 1, }, /* New Zealand Daylight */ | |
5e2a78a4 | 305 | { "IDLE", +12, 0, }, /* International Date Line East */ |
89967023 | 306 | }; |
ecee9d9e | 307 | |
89967023 | 308 | static int match_string(const char *date, const char *str) |
ecee9d9e | 309 | { |
89967023 LT |
310 | int i = 0; |
311 | ||
312 | for (i = 0; *date; date++, str++, i++) { | |
313 | if (*date == *str) | |
314 | continue; | |
315 | if (toupper(*date) == toupper(*str)) | |
316 | continue; | |
317 | if (!isalnum(*date)) | |
318 | break; | |
319 | return 0; | |
320 | } | |
321 | return i; | |
ecee9d9e ET |
322 | } |
323 | ||
68849b54 LT |
324 | static int skip_alpha(const char *date) |
325 | { | |
326 | int i = 0; | |
327 | do { | |
328 | i++; | |
329 | } while (isalpha(date[i])); | |
330 | return i; | |
331 | } | |
332 | ||
89967023 LT |
333 | /* |
334 | * Parse month, weekday, or timezone name | |
335 | */ | |
336 | static int match_alpha(const char *date, struct tm *tm, int *offset) | |
ecee9d9e | 337 | { |
89967023 | 338 | int i; |
ecee9d9e | 339 | |
89967023 LT |
340 | for (i = 0; i < 12; i++) { |
341 | int match = match_string(date, month_names[i]); | |
342 | if (match >= 3) { | |
343 | tm->tm_mon = i; | |
344 | return match; | |
ecee9d9e | 345 | } |
89967023 | 346 | } |
ecee9d9e | 347 | |
89967023 LT |
348 | for (i = 0; i < 7; i++) { |
349 | int match = match_string(date, weekday_names[i]); | |
350 | if (match >= 3) { | |
351 | tm->tm_wday = i; | |
352 | return match; | |
353 | } | |
354 | } | |
ecee9d9e | 355 | |
b4f2a6ac | 356 | for (i = 0; i < ARRAY_SIZE(timezone_names); i++) { |
89967023 | 357 | int match = match_string(date, timezone_names[i].name); |
75b37e70 | 358 | if (match >= 3 || match == strlen(timezone_names[i].name)) { |
5e2a78a4 LT |
359 | int off = timezone_names[i].offset; |
360 | ||
361 | /* This is bogus, but we like summer */ | |
362 | off += timezone_names[i].dst; | |
363 | ||
92e2311b LT |
364 | /* Only use the tz name offset if we don't have anything better */ |
365 | if (*offset == -1) | |
366 | *offset = 60*off; | |
367 | ||
89967023 | 368 | return match; |
ecee9d9e ET |
369 | } |
370 | } | |
ecee9d9e | 371 | |
68849b54 | 372 | if (match_string(date, "PM") == 2) { |
18b633ca LT |
373 | tm->tm_hour = (tm->tm_hour % 12) + 12; |
374 | return 2; | |
375 | } | |
376 | ||
377 | if (match_string(date, "AM") == 2) { | |
378 | tm->tm_hour = (tm->tm_hour % 12) + 0; | |
68849b54 LT |
379 | return 2; |
380 | } | |
381 | ||
89967023 | 382 | /* BAD CRAP */ |
68849b54 | 383 | return skip_alpha(date); |
89967023 | 384 | } |
ecee9d9e | 385 | |
38035cf4 | 386 | static int is_date(int year, int month, int day, struct tm *now_tm, time_t now, struct tm *tm) |
89967023 | 387 | { |
198b0fb6 | 388 | if (month > 0 && month < 13 && day > 0 && day < 32) { |
38035cf4 JH |
389 | struct tm check = *tm; |
390 | struct tm *r = (now_tm ? &check : tm); | |
391 | time_t specified; | |
392 | ||
393 | r->tm_mon = month - 1; | |
394 | r->tm_mday = day; | |
198b0fb6 | 395 | if (year == -1) { |
38035cf4 JH |
396 | if (!now_tm) |
397 | return 1; | |
398 | r->tm_year = now_tm->tm_year; | |
89967023 | 399 | } |
38035cf4 JH |
400 | else if (year >= 1970 && year < 2100) |
401 | r->tm_year = year - 1900; | |
402 | else if (year > 70 && year < 100) | |
403 | r->tm_year = year; | |
404 | else if (year < 38) | |
405 | r->tm_year = year + 100; | |
406 | else | |
198b0fb6 | 407 | return 0; |
38035cf4 JH |
408 | if (!now_tm) |
409 | return 1; | |
410 | ||
bb5799d6 | 411 | specified = tm_to_time_t(r); |
198b0fb6 | 412 | |
38035cf4 JH |
413 | /* Be it commit time or author time, it does not make |
414 | * sense to specify timestamp way into the future. Make | |
415 | * sure it is not later than ten days from now... | |
416 | */ | |
e6e87516 | 417 | if ((specified != -1) && (now + 10*24*3600 < specified)) |
38035cf4 JH |
418 | return 0; |
419 | tm->tm_mon = r->tm_mon; | |
420 | tm->tm_mday = r->tm_mday; | |
421 | if (year != -1) | |
422 | tm->tm_year = r->tm_year; | |
198b0fb6 | 423 | return 1; |
89967023 | 424 | } |
198b0fb6 LT |
425 | return 0; |
426 | } | |
ecee9d9e | 427 | |
073281e2 JK |
428 | static int match_multi_number(unsigned long num, char c, const char *date, |
429 | char *end, struct tm *tm, time_t now) | |
198b0fb6 | 430 | { |
38035cf4 JH |
431 | struct tm now_tm; |
432 | struct tm *refuse_future; | |
198b0fb6 LT |
433 | long num2, num3; |
434 | ||
435 | num2 = strtol(end+1, &end, 10); | |
436 | num3 = -1; | |
437 | if (*end == c && isdigit(end[1])) | |
438 | num3 = strtol(end+1, &end, 10); | |
439 | ||
440 | /* Time? Date? */ | |
89967023 | 441 | switch (c) { |
198b0fb6 LT |
442 | case ':': |
443 | if (num3 < 0) | |
444 | num3 = 0; | |
445 | if (num < 25 && num2 >= 0 && num2 < 60 && num3 >= 0 && num3 <= 60) { | |
446 | tm->tm_hour = num; | |
447 | tm->tm_min = num2; | |
448 | tm->tm_sec = num3; | |
89967023 LT |
449 | break; |
450 | } | |
198b0fb6 | 451 | return 0; |
89967023 LT |
452 | |
453 | case '-': | |
454 | case '/': | |
38035cf4 | 455 | case '.': |
073281e2 JK |
456 | if (!now) |
457 | now = time(NULL); | |
38035cf4 JH |
458 | refuse_future = NULL; |
459 | if (gmtime_r(&now, &now_tm)) | |
460 | refuse_future = &now_tm; | |
461 | ||
198b0fb6 LT |
462 | if (num > 70) { |
463 | /* yyyy-mm-dd? */ | |
d3723953 | 464 | if (is_date(num, num2, num3, NULL, now, tm)) |
198b0fb6 LT |
465 | break; |
466 | /* yyyy-dd-mm? */ | |
d3723953 | 467 | if (is_date(num, num3, num2, NULL, now, tm)) |
89967023 | 468 | break; |
198b0fb6 | 469 | } |
38035cf4 JH |
470 | /* Our eastern European friends say dd.mm.yy[yy] |
471 | * is the norm there, so giving precedence to | |
472 | * mm/dd/yy[yy] form only when separator is not '.' | |
473 | */ | |
474 | if (c != '.' && | |
475 | is_date(num3, num, num2, refuse_future, now, tm)) | |
476 | break; | |
477 | /* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */ | |
478 | if (is_date(num3, num2, num, refuse_future, now, tm)) | |
89967023 | 479 | break; |
38035cf4 JH |
480 | /* Funny European mm.dd.yy */ |
481 | if (c == '.' && | |
482 | is_date(num3, num, num2, refuse_future, now, tm)) | |
198b0fb6 LT |
483 | break; |
484 | return 0; | |
485 | } | |
486 | return end - date; | |
487 | } | |
488 | ||
36e4986f LT |
489 | /* |
490 | * Have we filled in any part of the time/date yet? | |
491 | * We just do a binary 'and' to see if the sign bit | |
492 | * is set in all the values. | |
493 | */ | |
9f2b6d29 LT |
494 | static inline int nodate(struct tm *tm) |
495 | { | |
36e4986f LT |
496 | return (tm->tm_year & |
497 | tm->tm_mon & | |
498 | tm->tm_mday & | |
499 | tm->tm_hour & | |
500 | tm->tm_min & | |
501 | tm->tm_sec) < 0; | |
9f2b6d29 LT |
502 | } |
503 | ||
198b0fb6 | 504 | /* |
a6080a0a | 505 | * We've seen a digit. Time? Year? Date? |
198b0fb6 | 506 | */ |
26a2d8ae | 507 | static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt) |
198b0fb6 LT |
508 | { |
509 | int n; | |
510 | char *end; | |
511 | unsigned long num; | |
512 | ||
513 | num = strtoul(date, &end, 10); | |
514 | ||
515 | /* | |
a1a5a634 JS |
516 | * Seconds since 1970? We trigger on that for any numbers with |
517 | * more than 8 digits. This is because we don't want to rule out | |
518 | * numbers like 20070606 as a YYYYMMDD date. | |
198b0fb6 | 519 | */ |
9f2b6d29 | 520 | if (num >= 100000000 && nodate(tm)) { |
198b0fb6 | 521 | time_t time = num; |
9cb480f2 JH |
522 | if (gmtime_r(&time, tm)) { |
523 | *tm_gmt = 1; | |
198b0fb6 | 524 | return end - date; |
9cb480f2 | 525 | } |
198b0fb6 LT |
526 | } |
527 | ||
528 | /* | |
38035cf4 | 529 | * Check for special formats: num[-.:/]num[same]num |
198b0fb6 LT |
530 | */ |
531 | switch (*end) { | |
532 | case ':': | |
38035cf4 | 533 | case '.': |
198b0fb6 LT |
534 | case '/': |
535 | case '-': | |
536 | if (isdigit(end[1])) { | |
073281e2 | 537 | int match = match_multi_number(num, *end, date, end, tm, 0); |
198b0fb6 LT |
538 | if (match) |
539 | return match; | |
89967023 LT |
540 | } |
541 | } | |
198b0fb6 LT |
542 | |
543 | /* | |
544 | * None of the special formats? Try to guess what | |
545 | * the number meant. We use the number of digits | |
546 | * to make a more educated guess.. | |
547 | */ | |
548 | n = 0; | |
549 | do { | |
550 | n++; | |
551 | } while (isdigit(date[n])); | |
552 | ||
553 | /* Four-digit year or a timezone? */ | |
554 | if (n == 4) { | |
7122f82f | 555 | if (num <= 1400 && *offset == -1) { |
198b0fb6 LT |
556 | unsigned int minutes = num % 100; |
557 | unsigned int hours = num / 100; | |
558 | *offset = hours*60 + minutes; | |
559 | } else if (num > 1900 && num < 2100) | |
560 | tm->tm_year = num - 1900; | |
561 | return n; | |
562 | } | |
563 | ||
9f2b6d29 LT |
564 | /* |
565 | * Ignore lots of numerals. We took care of 4-digit years above. | |
566 | * Days or months must be one or two digits. | |
567 | */ | |
568 | if (n > 2) | |
569 | return n; | |
570 | ||
198b0fb6 LT |
571 | /* |
572 | * NOTE! We will give precedence to day-of-month over month or | |
82f9d58a | 573 | * year numbers in the 1-12 range. So 05 is always "mday 5", |
198b0fb6 LT |
574 | * unless we already have a mday.. |
575 | * | |
576 | * IOW, 01 Apr 05 parses as "April 1st, 2005". | |
577 | */ | |
578 | if (num > 0 && num < 32 && tm->tm_mday < 0) { | |
579 | tm->tm_mday = num; | |
580 | return n; | |
581 | } | |
582 | ||
583 | /* Two-digit year? */ | |
584 | if (n == 2 && tm->tm_year < 0) { | |
585 | if (num < 10 && tm->tm_mday >= 0) { | |
586 | tm->tm_year = num + 100; | |
587 | return n; | |
588 | } | |
589 | if (num >= 70) { | |
590 | tm->tm_year = num; | |
591 | return n; | |
592 | } | |
593 | } | |
594 | ||
90290552 | 595 | if (num > 0 && num < 13 && tm->tm_mon < 0) |
198b0fb6 | 596 | tm->tm_mon = num-1; |
a6080a0a | 597 | |
198b0fb6 | 598 | return n; |
89967023 | 599 | } |
ecee9d9e | 600 | |
26a2d8ae | 601 | static int match_tz(const char *date, int *offp) |
89967023 LT |
602 | { |
603 | char *end; | |
ee646eb4 HL |
604 | int hour = strtoul(date + 1, &end, 10); |
605 | int n = end - (date + 1); | |
606 | int min = 0; | |
ecee9d9e | 607 | |
ee646eb4 HL |
608 | if (n == 4) { |
609 | /* hhmm */ | |
610 | min = hour % 100; | |
611 | hour = hour / 100; | |
612 | } else if (n != 2) { | |
613 | min = 99; /* random crap */ | |
614 | } else if (*end == ':') { | |
615 | /* hh:mm? */ | |
616 | min = strtoul(end + 1, &end, 10); | |
617 | if (end - (date + 1) != 5) | |
618 | min = 99; /* random crap */ | |
619 | } /* otherwise we parsed "hh" */ | |
ecee9d9e | 620 | |
198b0fb6 | 621 | /* |
ee646eb4 HL |
622 | * Don't accept any random crap. Even though some places have |
623 | * offset larger than 12 hours (e.g. Pacific/Kiritimati is at | |
624 | * UTC+14), there is something wrong if hour part is much | |
625 | * larger than that. We might also want to check that the | |
626 | * minutes are divisible by 15 or something too. (Offset of | |
627 | * Kathmandu, Nepal is UTC+5:45) | |
198b0fb6 | 628 | */ |
ee646eb4 HL |
629 | if (min < 60 && hour < 24) { |
630 | int offset = hour * 60 + min; | |
68849b54 LT |
631 | if (*date == '-') |
632 | offset = -offset; | |
68849b54 LT |
633 | *offp = offset; |
634 | } | |
89967023 LT |
635 | return end - date; |
636 | } | |
ecee9d9e | 637 | |
c33ddc2e | 638 | static void date_string(unsigned long date, int offset, struct strbuf *buf) |
01c6ad29 LT |
639 | { |
640 | int sign = '+'; | |
641 | ||
642 | if (offset < 0) { | |
643 | offset = -offset; | |
644 | sign = '-'; | |
645 | } | |
c33ddc2e | 646 | strbuf_addf(buf, "%lu %c%02d%02d", date, sign, offset / 60, offset % 60); |
01c6ad29 LT |
647 | } |
648 | ||
116eb3ab JH |
649 | /* |
650 | * Parse a string like "0 +0000" as ancient timestamp near epoch, but | |
651 | * only when it appears not as part of any other string. | |
652 | */ | |
653 | static int match_object_header_date(const char *date, unsigned long *timestamp, int *offset) | |
654 | { | |
655 | char *end; | |
656 | unsigned long stamp; | |
657 | int ofs; | |
658 | ||
be21d167 | 659 | if (*date < '0' || '9' < *date) |
116eb3ab JH |
660 | return -1; |
661 | stamp = strtoul(date, &end, 10); | |
662 | if (*end != ' ' || stamp == ULONG_MAX || (end[1] != '+' && end[1] != '-')) | |
663 | return -1; | |
664 | date = end + 2; | |
665 | ofs = strtol(date, &end, 10); | |
666 | if ((*end != '\0' && (*end != '\n')) || end != date + 4) | |
667 | return -1; | |
668 | ofs = (ofs / 100) * 60 + (ofs % 100); | |
669 | if (date[-1] == '-') | |
670 | ofs = -ofs; | |
671 | *timestamp = stamp; | |
672 | *offset = ofs; | |
673 | return 0; | |
674 | } | |
675 | ||
89967023 LT |
676 | /* Gr. strptime is crap for this; it doesn't have a way to require RFC2822 |
677 | (i.e. English) day/month names, and it doesn't work correctly with %z. */ | |
9644c061 | 678 | int parse_date_basic(const char *date, unsigned long *timestamp, int *offset) |
89967023 LT |
679 | { |
680 | struct tm tm; | |
c5043cc1 RR |
681 | int tm_gmt; |
682 | unsigned long dummy_timestamp; | |
683 | int dummy_offset; | |
684 | ||
685 | if (!timestamp) | |
686 | timestamp = &dummy_timestamp; | |
687 | if (!offset) | |
688 | offset = &dummy_offset; | |
ecee9d9e | 689 | |
89967023 LT |
690 | memset(&tm, 0, sizeof(tm)); |
691 | tm.tm_year = -1; | |
692 | tm.tm_mon = -1; | |
693 | tm.tm_mday = -1; | |
eaa85129 | 694 | tm.tm_isdst = -1; |
36e4986f LT |
695 | tm.tm_hour = -1; |
696 | tm.tm_min = -1; | |
697 | tm.tm_sec = -1; | |
c5043cc1 | 698 | *offset = -1; |
9cb480f2 | 699 | tm_gmt = 0; |
89967023 | 700 | |
2c733fb2 JH |
701 | if (*date == '@' && |
702 | !match_object_header_date(date + 1, timestamp, offset)) | |
116eb3ab | 703 | return 0; /* success */ |
89967023 LT |
704 | for (;;) { |
705 | int match = 0; | |
706 | unsigned char c = *date; | |
707 | ||
708 | /* Stop at end of string or newline */ | |
709 | if (!c || c == '\n') | |
710 | break; | |
711 | ||
712 | if (isalpha(c)) | |
c5043cc1 | 713 | match = match_alpha(date, &tm, offset); |
89967023 | 714 | else if (isdigit(c)) |
c5043cc1 | 715 | match = match_digit(date, &tm, offset, &tm_gmt); |
89967023 | 716 | else if ((c == '-' || c == '+') && isdigit(date[1])) |
c5043cc1 | 717 | match = match_tz(date, offset); |
89967023 LT |
718 | |
719 | if (!match) { | |
720 | /* BAD CRAP */ | |
721 | match = 1; | |
a6080a0a | 722 | } |
89967023 LT |
723 | |
724 | date += match; | |
725 | } | |
ecee9d9e | 726 | |
f6e63621 | 727 | /* do not use mktime(), which uses local timezone, here */ |
c5043cc1 | 728 | *timestamp = tm_to_time_t(&tm); |
7fcec48d JH |
729 | if (*timestamp == -1) |
730 | return -1; | |
731 | ||
e1033da6 | 732 | if (*offset == -1) { |
f6e63621 JH |
733 | time_t temp_time; |
734 | ||
735 | /* gmtime_r() in match_digit() may have clobbered it */ | |
736 | tm.tm_isdst = -1; | |
737 | temp_time = mktime(&tm); | |
e1033da6 MG |
738 | if ((time_t)*timestamp > temp_time) { |
739 | *offset = ((time_t)*timestamp - temp_time) / 60; | |
740 | } else { | |
741 | *offset = -(int)((temp_time - (time_t)*timestamp) / 60); | |
742 | } | |
743 | } | |
eaa85129 | 744 | |
9cb480f2 | 745 | if (!tm_gmt) |
c5043cc1 | 746 | *timestamp -= *offset * 60; |
9644c061 | 747 | return 0; /* success */ |
c5043cc1 RR |
748 | } |
749 | ||
3d27b9b0 JH |
750 | int parse_expiry_date(const char *date, unsigned long *timestamp) |
751 | { | |
752 | int errors = 0; | |
753 | ||
754 | if (!strcmp(date, "never") || !strcmp(date, "false")) | |
755 | *timestamp = 0; | |
756 | else if (!strcmp(date, "all") || !strcmp(date, "now")) | |
757 | /* | |
758 | * We take over "now" here, which usually translates | |
759 | * to the current timestamp. This is because the user | |
760 | * really means to expire everything she has done in | |
761 | * the past, and by definition reflogs are the record | |
762 | * of the past, and there is nothing from the future | |
763 | * to be kept. | |
764 | */ | |
765 | *timestamp = ULONG_MAX; | |
766 | else | |
767 | *timestamp = approxidate_careful(date, &errors); | |
768 | ||
769 | return errors; | |
770 | } | |
771 | ||
c33ddc2e | 772 | int parse_date(const char *date, struct strbuf *result) |
c5043cc1 RR |
773 | { |
774 | unsigned long timestamp; | |
775 | int offset; | |
9644c061 | 776 | if (parse_date_basic(date, ×tamp, &offset)) |
c5043cc1 | 777 | return -1; |
c33ddc2e JK |
778 | date_string(timestamp, offset, result); |
779 | return 0; | |
ecee9d9e ET |
780 | } |
781 | ||
add00ba2 JK |
782 | static enum date_mode_type parse_date_type(const char *format, const char **end) |
783 | { | |
784 | if (skip_prefix(format, "relative", end)) | |
785 | return DATE_RELATIVE; | |
786 | if (skip_prefix(format, "iso8601-strict", end) || | |
787 | skip_prefix(format, "iso-strict", end)) | |
788 | return DATE_ISO8601_STRICT; | |
789 | if (skip_prefix(format, "iso8601", end) || | |
790 | skip_prefix(format, "iso", end)) | |
791 | return DATE_ISO8601; | |
792 | if (skip_prefix(format, "rfc2822", end) || | |
793 | skip_prefix(format, "rfc", end)) | |
794 | return DATE_RFC2822; | |
795 | if (skip_prefix(format, "short", end)) | |
796 | return DATE_SHORT; | |
797 | if (skip_prefix(format, "default", end)) | |
798 | return DATE_NORMAL; | |
799 | if (skip_prefix(format, "raw", end)) | |
800 | return DATE_RAW; | |
642833db JK |
801 | if (skip_prefix(format, "unix", end)) |
802 | return DATE_UNIX; | |
add00ba2 JK |
803 | if (skip_prefix(format, "format", end)) |
804 | return DATE_STRFTIME; | |
805 | ||
806 | die("unknown date format %s", format); | |
807 | } | |
808 | ||
a5481a6c | 809 | void parse_date_format(const char *format, struct date_mode *mode) |
856665f8 | 810 | { |
add00ba2 JK |
811 | const char *p; |
812 | ||
813 | /* historical alias */ | |
814 | if (!strcmp(format, "local")) | |
815 | format = "default-local"; | |
816 | ||
817 | mode->type = parse_date_type(format, &p); | |
818 | mode->local = 0; | |
819 | ||
820 | if (skip_prefix(p, "-local", &p)) | |
821 | mode->local = 1; | |
822 | ||
823 | if (mode->type == DATE_STRFTIME) { | |
824 | if (!skip_prefix(p, ":", &p)) | |
825 | die("date format missing colon separator: %s", format); | |
826 | mode->strftime_fmt = xstrdup(p); | |
827 | } else if (*p) | |
856665f8 AP |
828 | die("unknown date format %s", format); |
829 | } | |
830 | ||
c33ddc2e | 831 | void datestamp(struct strbuf *out) |
ecee9d9e ET |
832 | { |
833 | time_t now; | |
834 | int offset; | |
835 | ||
836 | time(&now); | |
837 | ||
bb5799d6 | 838 | offset = tm_to_time_t(localtime(&now)) - now; |
ecee9d9e ET |
839 | offset /= 60; |
840 | ||
c33ddc2e | 841 | date_string(now, offset, out); |
ecee9d9e | 842 | } |
3c07b1d1 | 843 | |
90290552 LT |
844 | /* |
845 | * Relative time update (eg "2 days ago"). If we haven't set the time | |
846 | * yet, we need to set it from current time. | |
847 | */ | |
848 | static unsigned long update_tm(struct tm *tm, struct tm *now, unsigned long sec) | |
3c07b1d1 | 849 | { |
90290552 LT |
850 | time_t n; |
851 | ||
852 | if (tm->tm_mday < 0) | |
853 | tm->tm_mday = now->tm_mday; | |
854 | if (tm->tm_mon < 0) | |
855 | tm->tm_mon = now->tm_mon; | |
856 | if (tm->tm_year < 0) { | |
857 | tm->tm_year = now->tm_year; | |
858 | if (tm->tm_mon > now->tm_mon) | |
859 | tm->tm_year--; | |
860 | } | |
861 | ||
862 | n = mktime(tm) - sec; | |
3c07b1d1 | 863 | localtime_r(&n, tm); |
90290552 | 864 | return n; |
3c07b1d1 LT |
865 | } |
866 | ||
93cfa7c7 JH |
867 | static void date_now(struct tm *tm, struct tm *now, int *num) |
868 | { | |
869 | update_tm(tm, now, 0); | |
870 | } | |
871 | ||
90290552 | 872 | static void date_yesterday(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 873 | { |
90290552 | 874 | update_tm(tm, now, 24*60*60); |
a8aca418 LT |
875 | } |
876 | ||
90290552 | 877 | static void date_time(struct tm *tm, struct tm *now, int hour) |
a8aca418 LT |
878 | { |
879 | if (tm->tm_hour < hour) | |
90290552 | 880 | date_yesterday(tm, now, NULL); |
a8aca418 LT |
881 | tm->tm_hour = hour; |
882 | tm->tm_min = 0; | |
883 | tm->tm_sec = 0; | |
884 | } | |
885 | ||
90290552 | 886 | static void date_midnight(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 887 | { |
90290552 | 888 | date_time(tm, now, 0); |
a8aca418 LT |
889 | } |
890 | ||
90290552 | 891 | static void date_noon(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 892 | { |
90290552 | 893 | date_time(tm, now, 12); |
a8aca418 LT |
894 | } |
895 | ||
90290552 | 896 | static void date_tea(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 897 | { |
90290552 | 898 | date_time(tm, now, 17); |
a8aca418 LT |
899 | } |
900 | ||
90290552 | 901 | static void date_pm(struct tm *tm, struct tm *now, int *num) |
393d340e | 902 | { |
18b633ca | 903 | int hour, n = *num; |
393d340e LT |
904 | *num = 0; |
905 | ||
18b633ca LT |
906 | hour = tm->tm_hour; |
907 | if (n) { | |
908 | hour = n; | |
393d340e LT |
909 | tm->tm_min = 0; |
910 | tm->tm_sec = 0; | |
911 | } | |
18b633ca | 912 | tm->tm_hour = (hour % 12) + 12; |
393d340e LT |
913 | } |
914 | ||
90290552 | 915 | static void date_am(struct tm *tm, struct tm *now, int *num) |
393d340e | 916 | { |
18b633ca | 917 | int hour, n = *num; |
393d340e LT |
918 | *num = 0; |
919 | ||
18b633ca LT |
920 | hour = tm->tm_hour; |
921 | if (n) { | |
922 | hour = n; | |
393d340e LT |
923 | tm->tm_min = 0; |
924 | tm->tm_sec = 0; | |
925 | } | |
18b633ca | 926 | tm->tm_hour = (hour % 12); |
393d340e LT |
927 | } |
928 | ||
90290552 | 929 | static void date_never(struct tm *tm, struct tm *now, int *num) |
af66366a | 930 | { |
8c6b5786 OM |
931 | time_t n = 0; |
932 | localtime_r(&n, tm); | |
af66366a JS |
933 | } |
934 | ||
a8aca418 LT |
935 | static const struct special { |
936 | const char *name; | |
90290552 | 937 | void (*fn)(struct tm *, struct tm *, int *); |
a8aca418 LT |
938 | } special[] = { |
939 | { "yesterday", date_yesterday }, | |
940 | { "noon", date_noon }, | |
941 | { "midnight", date_midnight }, | |
942 | { "tea", date_tea }, | |
393d340e LT |
943 | { "PM", date_pm }, |
944 | { "AM", date_am }, | |
af66366a | 945 | { "never", date_never }, |
93cfa7c7 | 946 | { "now", date_now }, |
a8aca418 LT |
947 | { NULL } |
948 | }; | |
949 | ||
3c07b1d1 LT |
950 | static const char *number_name[] = { |
951 | "zero", "one", "two", "three", "four", | |
952 | "five", "six", "seven", "eight", "nine", "ten", | |
953 | }; | |
954 | ||
a8aca418 | 955 | static const struct typelen { |
3c07b1d1 LT |
956 | const char *type; |
957 | int length; | |
958 | } typelen[] = { | |
959 | { "seconds", 1 }, | |
960 | { "minutes", 60 }, | |
961 | { "hours", 60*60 }, | |
962 | { "days", 24*60*60 }, | |
963 | { "weeks", 7*24*60*60 }, | |
964 | { NULL } | |
a6080a0a | 965 | }; |
3c07b1d1 | 966 | |
93cfa7c7 | 967 | static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm *now, int *num, int *touched) |
3c07b1d1 | 968 | { |
a8aca418 LT |
969 | const struct typelen *tl; |
970 | const struct special *s; | |
3c07b1d1 | 971 | const char *end = date; |
5df7dbba | 972 | int i; |
3c07b1d1 | 973 | |
38db01b7 | 974 | while (isalpha(*++end)) |
5df7dbba | 975 | ; |
3c07b1d1 LT |
976 | |
977 | for (i = 0; i < 12; i++) { | |
978 | int match = match_string(date, month_names[i]); | |
979 | if (match >= 3) { | |
980 | tm->tm_mon = i; | |
93cfa7c7 | 981 | *touched = 1; |
3c07b1d1 LT |
982 | return end; |
983 | } | |
984 | } | |
985 | ||
a8aca418 LT |
986 | for (s = special; s->name; s++) { |
987 | int len = strlen(s->name); | |
988 | if (match_string(date, s->name) == len) { | |
90290552 | 989 | s->fn(tm, now, num); |
93cfa7c7 | 990 | *touched = 1; |
a8aca418 LT |
991 | return end; |
992 | } | |
3c07b1d1 LT |
993 | } |
994 | ||
995 | if (!*num) { | |
996 | for (i = 1; i < 11; i++) { | |
997 | int len = strlen(number_name[i]); | |
998 | if (match_string(date, number_name[i]) == len) { | |
999 | *num = i; | |
93cfa7c7 | 1000 | *touched = 1; |
3c07b1d1 LT |
1001 | return end; |
1002 | } | |
1003 | } | |
93cfa7c7 | 1004 | if (match_string(date, "last") == 4) { |
3c07b1d1 | 1005 | *num = 1; |
93cfa7c7 JH |
1006 | *touched = 1; |
1007 | } | |
3c07b1d1 LT |
1008 | return end; |
1009 | } | |
1010 | ||
1011 | tl = typelen; | |
1012 | while (tl->type) { | |
1013 | int len = strlen(tl->type); | |
1014 | if (match_string(date, tl->type) >= len-1) { | |
90290552 | 1015 | update_tm(tm, now, tl->length * *num); |
3c07b1d1 | 1016 | *num = 0; |
93cfa7c7 | 1017 | *touched = 1; |
3c07b1d1 LT |
1018 | return end; |
1019 | } | |
1020 | tl++; | |
1021 | } | |
1022 | ||
6b7b0427 LT |
1023 | for (i = 0; i < 7; i++) { |
1024 | int match = match_string(date, weekday_names[i]); | |
1025 | if (match >= 3) { | |
1026 | int diff, n = *num -1; | |
1027 | *num = 0; | |
1028 | ||
1029 | diff = tm->tm_wday - i; | |
1030 | if (diff <= 0) | |
1031 | n++; | |
1032 | diff += 7*n; | |
1033 | ||
90290552 | 1034 | update_tm(tm, now, diff * 24 * 60 * 60); |
93cfa7c7 | 1035 | *touched = 1; |
6b7b0427 LT |
1036 | return end; |
1037 | } | |
1038 | } | |
1039 | ||
3c07b1d1 | 1040 | if (match_string(date, "months") >= 5) { |
931e8e27 JK |
1041 | int n; |
1042 | update_tm(tm, now, 0); /* fill in date fields if needed */ | |
1043 | n = tm->tm_mon - *num; | |
3c07b1d1 LT |
1044 | *num = 0; |
1045 | while (n < 0) { | |
1046 | n += 12; | |
1047 | tm->tm_year--; | |
1048 | } | |
1049 | tm->tm_mon = n; | |
93cfa7c7 | 1050 | *touched = 1; |
3c07b1d1 LT |
1051 | return end; |
1052 | } | |
1053 | ||
1054 | if (match_string(date, "years") >= 4) { | |
931e8e27 | 1055 | update_tm(tm, now, 0); /* fill in date fields if needed */ |
3c07b1d1 LT |
1056 | tm->tm_year -= *num; |
1057 | *num = 0; | |
93cfa7c7 | 1058 | *touched = 1; |
3c07b1d1 LT |
1059 | return end; |
1060 | } | |
1061 | ||
1062 | return end; | |
1063 | } | |
1064 | ||
073281e2 JK |
1065 | static const char *approxidate_digit(const char *date, struct tm *tm, int *num, |
1066 | time_t now) | |
e92a54d9 LT |
1067 | { |
1068 | char *end; | |
1069 | unsigned long number = strtoul(date, &end, 10); | |
1070 | ||
393d340e LT |
1071 | switch (*end) { |
1072 | case ':': | |
1073 | case '.': | |
1074 | case '/': | |
1075 | case '-': | |
1076 | if (isdigit(end[1])) { | |
073281e2 JK |
1077 | int match = match_multi_number(number, *end, date, end, |
1078 | tm, now); | |
393d340e LT |
1079 | if (match) |
1080 | return date + match; | |
1081 | } | |
1082 | } | |
1083 | ||
9f2b6d29 LT |
1084 | /* Accept zero-padding only for small numbers ("Dec 02", never "Dec 0002") */ |
1085 | if (date[0] != '0' || end - date <= 2) | |
1086 | *num = number; | |
e92a54d9 LT |
1087 | return end; |
1088 | } | |
1089 | ||
90290552 LT |
1090 | /* |
1091 | * Do we have a pending number at the end, or when | |
1092 | * we see a new one? Let's assume it's a month day, | |
1093 | * as in "Dec 6, 1992" | |
1094 | */ | |
1095 | static void pending_number(struct tm *tm, int *num) | |
1096 | { | |
1097 | int number = *num; | |
1098 | ||
1099 | if (number) { | |
1100 | *num = 0; | |
1101 | if (tm->tm_mday < 0 && number < 32) | |
1102 | tm->tm_mday = number; | |
36e4986f LT |
1103 | else if (tm->tm_mon < 0 && number < 13) |
1104 | tm->tm_mon = number-1; | |
1105 | else if (tm->tm_year < 0) { | |
1106 | if (number > 1969 && number < 2100) | |
1107 | tm->tm_year = number - 1900; | |
1108 | else if (number > 69 && number < 100) | |
1109 | tm->tm_year = number; | |
1110 | else if (number < 38) | |
1111 | tm->tm_year = 100 + number; | |
1112 | /* We screw up for number = 00 ? */ | |
1113 | } | |
90290552 LT |
1114 | } |
1115 | } | |
1116 | ||
93cfa7c7 JH |
1117 | static unsigned long approxidate_str(const char *date, |
1118 | const struct timeval *tv, | |
1119 | int *error_ret) | |
3c07b1d1 LT |
1120 | { |
1121 | int number = 0; | |
93cfa7c7 | 1122 | int touched = 0; |
3c07b1d1 | 1123 | struct tm tm, now; |
f697b33b | 1124 | time_t time_sec; |
3c07b1d1 | 1125 | |
33012fc4 | 1126 | time_sec = tv->tv_sec; |
f697b33b | 1127 | localtime_r(&time_sec, &tm); |
3c07b1d1 | 1128 | now = tm; |
90290552 LT |
1129 | |
1130 | tm.tm_year = -1; | |
1131 | tm.tm_mon = -1; | |
1132 | tm.tm_mday = -1; | |
1133 | ||
3c07b1d1 LT |
1134 | for (;;) { |
1135 | unsigned char c = *date; | |
1136 | if (!c) | |
1137 | break; | |
1138 | date++; | |
1139 | if (isdigit(c)) { | |
90290552 | 1140 | pending_number(&tm, &number); |
073281e2 | 1141 | date = approxidate_digit(date-1, &tm, &number, time_sec); |
93cfa7c7 | 1142 | touched = 1; |
3c07b1d1 LT |
1143 | continue; |
1144 | } | |
1145 | if (isalpha(c)) | |
93cfa7c7 | 1146 | date = approxidate_alpha(date-1, &tm, &now, &number, &touched); |
3c07b1d1 | 1147 | } |
90290552 | 1148 | pending_number(&tm, &number); |
93cfa7c7 JH |
1149 | if (!touched) |
1150 | *error_ret = 1; | |
90290552 | 1151 | return update_tm(&tm, &now, 0); |
3c07b1d1 | 1152 | } |
33012fc4 AR |
1153 | |
1154 | unsigned long approxidate_relative(const char *date, const struct timeval *tv) | |
1155 | { | |
c5043cc1 RR |
1156 | unsigned long timestamp; |
1157 | int offset; | |
93cfa7c7 | 1158 | int errors = 0; |
33012fc4 | 1159 | |
9644c061 | 1160 | if (!parse_date_basic(date, ×tamp, &offset)) |
c5043cc1 | 1161 | return timestamp; |
93cfa7c7 | 1162 | return approxidate_str(date, tv, &errors); |
33012fc4 AR |
1163 | } |
1164 | ||
93cfa7c7 | 1165 | unsigned long approxidate_careful(const char *date, int *error_ret) |
33012fc4 AR |
1166 | { |
1167 | struct timeval tv; | |
c5043cc1 RR |
1168 | unsigned long timestamp; |
1169 | int offset; | |
93cfa7c7 JH |
1170 | int dummy = 0; |
1171 | if (!error_ret) | |
1172 | error_ret = &dummy; | |
33012fc4 | 1173 | |
9644c061 | 1174 | if (!parse_date_basic(date, ×tamp, &offset)) { |
93cfa7c7 | 1175 | *error_ret = 0; |
c5043cc1 | 1176 | return timestamp; |
93cfa7c7 | 1177 | } |
33012fc4 AR |
1178 | |
1179 | gettimeofday(&tv, NULL); | |
93cfa7c7 | 1180 | return approxidate_str(date, &tv, error_ret); |
33012fc4 | 1181 | } |
7ca36d93 JK |
1182 | |
1183 | int date_overflows(unsigned long t) | |
1184 | { | |
1185 | time_t sys; | |
1186 | ||
1187 | /* If we overflowed our unsigned long, that's bad... */ | |
1188 | if (t == ULONG_MAX) | |
1189 | return 1; | |
1190 | ||
1191 | /* | |
1192 | * ...but we also are going to feed the result to system | |
1193 | * functions that expect time_t, which is often "signed long". | |
1194 | * Make sure that we fit into time_t, as well. | |
1195 | */ | |
1196 | sys = t; | |
1197 | return t != sys || (t < 1) != (sys < 1); | |
1198 | } |