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