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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 | */ | |
12 | 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 | ||
f8493ec0 | 89 | const char *show_date(unsigned long time, int tz, enum date_mode mode) |
2a387043 JH |
90 | { |
91 | struct tm *tm; | |
92 | static char timebuf[200]; | |
93 | ||
7dff9b30 LT |
94 | if (mode == DATE_RAW) { |
95 | snprintf(timebuf, sizeof(timebuf), "%lu %+05d", time, tz); | |
96 | return timebuf; | |
97 | } | |
98 | ||
f8493ec0 | 99 | if (mode == DATE_RELATIVE) { |
9a8e35e9 | 100 | unsigned long diff; |
9a8e35e9 LT |
101 | struct timeval now; |
102 | gettimeofday(&now, NULL); | |
da8f070c | 103 | if (now.tv_sec < time) |
9a8e35e9 | 104 | return "in the future"; |
da8f070c | 105 | diff = now.tv_sec - time; |
9a8e35e9 LT |
106 | if (diff < 90) { |
107 | snprintf(timebuf, sizeof(timebuf), "%lu seconds ago", diff); | |
108 | return timebuf; | |
109 | } | |
110 | /* Turn it into minutes */ | |
111 | diff = (diff + 30) / 60; | |
112 | if (diff < 90) { | |
113 | snprintf(timebuf, sizeof(timebuf), "%lu minutes ago", diff); | |
114 | return timebuf; | |
115 | } | |
116 | /* Turn it into hours */ | |
117 | diff = (diff + 30) / 60; | |
118 | if (diff < 36) { | |
119 | snprintf(timebuf, sizeof(timebuf), "%lu hours ago", diff); | |
120 | return timebuf; | |
121 | } | |
122 | /* We deal with number of days from here on */ | |
123 | diff = (diff + 12) / 24; | |
124 | if (diff < 14) { | |
125 | snprintf(timebuf, sizeof(timebuf), "%lu days ago", diff); | |
126 | return timebuf; | |
127 | } | |
128 | /* Say weeks for the past 10 weeks or so */ | |
129 | if (diff < 70) { | |
130 | snprintf(timebuf, sizeof(timebuf), "%lu weeks ago", (diff + 3) / 7); | |
131 | return timebuf; | |
132 | } | |
133 | /* Say months for the past 12 months or so */ | |
134 | if (diff < 360) { | |
135 | snprintf(timebuf, sizeof(timebuf), "%lu months ago", (diff + 15) / 30); | |
136 | return timebuf; | |
137 | } | |
10edf377 JK |
138 | /* Give years and months for 5 years or so */ |
139 | if (diff < 1825) { | |
140 | unsigned long years = (diff + 183) / 365; | |
141 | unsigned long months = (diff % 365 + 15) / 30; | |
142 | int n; | |
143 | n = snprintf(timebuf, sizeof(timebuf), "%lu year%s", | |
144 | years, (years > 1 ? "s" : "")); | |
145 | if (months) | |
146 | snprintf(timebuf + n, sizeof(timebuf) - n, | |
147 | ", %lu month%s ago", | |
148 | months, (months > 1 ? "s" : "")); | |
149 | else | |
150 | snprintf(timebuf + n, sizeof(timebuf) - n, | |
151 | " ago"); | |
152 | return timebuf; | |
153 | } | |
154 | /* Otherwise, just years. Centuries is probably overkill. */ | |
155 | snprintf(timebuf, sizeof(timebuf), "%lu years ago", (diff + 183) / 365); | |
156 | return timebuf; | |
9a8e35e9 LT |
157 | } |
158 | ||
a7b02ccf JH |
159 | if (mode == DATE_LOCAL) |
160 | tz = local_tzoffset(time); | |
161 | ||
2a387043 | 162 | tm = time_to_tm(time, tz); |
f80cd783 LT |
163 | if (!tm) |
164 | return NULL; | |
f8493ec0 JS |
165 | if (mode == DATE_SHORT) |
166 | sprintf(timebuf, "%04d-%02d-%02d", tm->tm_year + 1900, | |
167 | tm->tm_mon + 1, tm->tm_mday); | |
ee8f838e RR |
168 | else if (mode == DATE_ISO8601) |
169 | sprintf(timebuf, "%04d-%02d-%02d %02d:%02d:%02d %+05d", | |
170 | tm->tm_year + 1900, | |
171 | tm->tm_mon + 1, | |
172 | tm->tm_mday, | |
173 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
174 | tz); | |
73013afd JH |
175 | else if (mode == DATE_RFC2822) |
176 | sprintf(timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d", | |
177 | weekday_names[tm->tm_wday], tm->tm_mday, | |
178 | month_names[tm->tm_mon], tm->tm_year + 1900, | |
179 | tm->tm_hour, tm->tm_min, tm->tm_sec, tz); | |
f8493ec0 | 180 | else |
a7b02ccf | 181 | sprintf(timebuf, "%.3s %.3s %d %02d:%02d:%02d %d%c%+05d", |
f8493ec0 JS |
182 | weekday_names[tm->tm_wday], |
183 | month_names[tm->tm_mon], | |
184 | tm->tm_mday, | |
185 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
a7b02ccf JH |
186 | tm->tm_year + 1900, |
187 | (mode == DATE_LOCAL) ? 0 : ' ', | |
188 | tz); | |
f80cd783 LT |
189 | return timebuf; |
190 | } | |
191 | ||
89967023 LT |
192 | /* |
193 | * Check these. And note how it doesn't do the summer-time conversion. | |
194 | * | |
195 | * In my world, it's always summer, and things are probably a bit off | |
196 | * in other ways too. | |
197 | */ | |
198 | static const struct { | |
199 | const char *name; | |
200 | int offset; | |
5e2a78a4 | 201 | int dst; |
89967023 | 202 | } timezone_names[] = { |
5e2a78a4 LT |
203 | { "IDLW", -12, 0, }, /* International Date Line West */ |
204 | { "NT", -11, 0, }, /* Nome */ | |
205 | { "CAT", -10, 0, }, /* Central Alaska */ | |
206 | { "HST", -10, 0, }, /* Hawaii Standard */ | |
207 | { "HDT", -10, 1, }, /* Hawaii Daylight */ | |
208 | { "YST", -9, 0, }, /* Yukon Standard */ | |
209 | { "YDT", -9, 1, }, /* Yukon Daylight */ | |
210 | { "PST", -8, 0, }, /* Pacific Standard */ | |
211 | { "PDT", -8, 1, }, /* Pacific Daylight */ | |
212 | { "MST", -7, 0, }, /* Mountain Standard */ | |
213 | { "MDT", -7, 1, }, /* Mountain Daylight */ | |
214 | { "CST", -6, 0, }, /* Central Standard */ | |
215 | { "CDT", -6, 1, }, /* Central Daylight */ | |
216 | { "EST", -5, 0, }, /* Eastern Standard */ | |
217 | { "EDT", -5, 1, }, /* Eastern Daylight */ | |
218 | { "AST", -3, 0, }, /* Atlantic Standard */ | |
219 | { "ADT", -3, 1, }, /* Atlantic Daylight */ | |
220 | { "WAT", -1, 0, }, /* West Africa */ | |
221 | ||
222 | { "GMT", 0, 0, }, /* Greenwich Mean */ | |
223 | { "UTC", 0, 0, }, /* Universal (Coordinated) */ | |
224 | ||
225 | { "WET", 0, 0, }, /* Western European */ | |
226 | { "BST", 0, 1, }, /* British Summer */ | |
227 | { "CET", +1, 0, }, /* Central European */ | |
228 | { "MET", +1, 0, }, /* Middle European */ | |
229 | { "MEWT", +1, 0, }, /* Middle European Winter */ | |
230 | { "MEST", +1, 1, }, /* Middle European Summer */ | |
231 | { "CEST", +1, 1, }, /* Central European Summer */ | |
232 | { "MESZ", +1, 1, }, /* Middle European Summer */ | |
233 | { "FWT", +1, 0, }, /* French Winter */ | |
234 | { "FST", +1, 1, }, /* French Summer */ | |
235 | { "EET", +2, 0, }, /* Eastern Europe, USSR Zone 1 */ | |
92e2311b | 236 | { "EEST", +2, 1, }, /* Eastern European Daylight */ |
5e2a78a4 LT |
237 | { "WAST", +7, 0, }, /* West Australian Standard */ |
238 | { "WADT", +7, 1, }, /* West Australian Daylight */ | |
239 | { "CCT", +8, 0, }, /* China Coast, USSR Zone 7 */ | |
240 | { "JST", +9, 0, }, /* Japan Standard, USSR Zone 8 */ | |
241 | { "EAST", +10, 0, }, /* Eastern Australian Standard */ | |
242 | { "EADT", +10, 1, }, /* Eastern Australian Daylight */ | |
243 | { "GST", +10, 0, }, /* Guam Standard, USSR Zone 9 */ | |
695ed472 SD |
244 | { "NZT", +12, 0, }, /* New Zealand */ |
245 | { "NZST", +12, 0, }, /* New Zealand Standard */ | |
246 | { "NZDT", +12, 1, }, /* New Zealand Daylight */ | |
5e2a78a4 | 247 | { "IDLE", +12, 0, }, /* International Date Line East */ |
89967023 | 248 | }; |
ecee9d9e | 249 | |
89967023 | 250 | static int match_string(const char *date, const char *str) |
ecee9d9e | 251 | { |
89967023 LT |
252 | int i = 0; |
253 | ||
254 | for (i = 0; *date; date++, str++, i++) { | |
255 | if (*date == *str) | |
256 | continue; | |
257 | if (toupper(*date) == toupper(*str)) | |
258 | continue; | |
259 | if (!isalnum(*date)) | |
260 | break; | |
261 | return 0; | |
262 | } | |
263 | return i; | |
ecee9d9e ET |
264 | } |
265 | ||
68849b54 LT |
266 | static int skip_alpha(const char *date) |
267 | { | |
268 | int i = 0; | |
269 | do { | |
270 | i++; | |
271 | } while (isalpha(date[i])); | |
272 | return i; | |
273 | } | |
274 | ||
89967023 LT |
275 | /* |
276 | * Parse month, weekday, or timezone name | |
277 | */ | |
278 | static int match_alpha(const char *date, struct tm *tm, int *offset) | |
ecee9d9e | 279 | { |
89967023 | 280 | int i; |
ecee9d9e | 281 | |
89967023 LT |
282 | for (i = 0; i < 12; i++) { |
283 | int match = match_string(date, month_names[i]); | |
284 | if (match >= 3) { | |
285 | tm->tm_mon = i; | |
286 | return match; | |
ecee9d9e | 287 | } |
89967023 | 288 | } |
ecee9d9e | 289 | |
89967023 LT |
290 | for (i = 0; i < 7; i++) { |
291 | int match = match_string(date, weekday_names[i]); | |
292 | if (match >= 3) { | |
293 | tm->tm_wday = i; | |
294 | return match; | |
295 | } | |
296 | } | |
ecee9d9e | 297 | |
b4f2a6ac | 298 | for (i = 0; i < ARRAY_SIZE(timezone_names); i++) { |
89967023 LT |
299 | int match = match_string(date, timezone_names[i].name); |
300 | if (match >= 3) { | |
5e2a78a4 LT |
301 | int off = timezone_names[i].offset; |
302 | ||
303 | /* This is bogus, but we like summer */ | |
304 | off += timezone_names[i].dst; | |
305 | ||
92e2311b LT |
306 | /* Only use the tz name offset if we don't have anything better */ |
307 | if (*offset == -1) | |
308 | *offset = 60*off; | |
309 | ||
89967023 | 310 | return match; |
ecee9d9e ET |
311 | } |
312 | } | |
ecee9d9e | 313 | |
68849b54 | 314 | if (match_string(date, "PM") == 2) { |
18b633ca LT |
315 | tm->tm_hour = (tm->tm_hour % 12) + 12; |
316 | return 2; | |
317 | } | |
318 | ||
319 | if (match_string(date, "AM") == 2) { | |
320 | tm->tm_hour = (tm->tm_hour % 12) + 0; | |
68849b54 LT |
321 | return 2; |
322 | } | |
323 | ||
89967023 | 324 | /* BAD CRAP */ |
68849b54 | 325 | return skip_alpha(date); |
89967023 | 326 | } |
ecee9d9e | 327 | |
38035cf4 | 328 | static int is_date(int year, int month, int day, struct tm *now_tm, time_t now, struct tm *tm) |
89967023 | 329 | { |
198b0fb6 | 330 | if (month > 0 && month < 13 && day > 0 && day < 32) { |
38035cf4 JH |
331 | struct tm check = *tm; |
332 | struct tm *r = (now_tm ? &check : tm); | |
333 | time_t specified; | |
334 | ||
335 | r->tm_mon = month - 1; | |
336 | r->tm_mday = day; | |
198b0fb6 | 337 | if (year == -1) { |
38035cf4 JH |
338 | if (!now_tm) |
339 | return 1; | |
340 | r->tm_year = now_tm->tm_year; | |
89967023 | 341 | } |
38035cf4 JH |
342 | else if (year >= 1970 && year < 2100) |
343 | r->tm_year = year - 1900; | |
344 | else if (year > 70 && year < 100) | |
345 | r->tm_year = year; | |
346 | else if (year < 38) | |
347 | r->tm_year = year + 100; | |
348 | else | |
198b0fb6 | 349 | return 0; |
38035cf4 JH |
350 | if (!now_tm) |
351 | return 1; | |
352 | ||
bb5799d6 | 353 | specified = tm_to_time_t(r); |
198b0fb6 | 354 | |
38035cf4 JH |
355 | /* Be it commit time or author time, it does not make |
356 | * sense to specify timestamp way into the future. Make | |
357 | * sure it is not later than ten days from now... | |
358 | */ | |
359 | if (now + 10*24*3600 < specified) | |
360 | return 0; | |
361 | tm->tm_mon = r->tm_mon; | |
362 | tm->tm_mday = r->tm_mday; | |
363 | if (year != -1) | |
364 | tm->tm_year = r->tm_year; | |
198b0fb6 | 365 | return 1; |
89967023 | 366 | } |
198b0fb6 LT |
367 | return 0; |
368 | } | |
ecee9d9e | 369 | |
26a2d8ae | 370 | static int match_multi_number(unsigned long num, char c, const char *date, char *end, struct tm *tm) |
198b0fb6 | 371 | { |
38035cf4 JH |
372 | time_t now; |
373 | struct tm now_tm; | |
374 | struct tm *refuse_future; | |
198b0fb6 LT |
375 | long num2, num3; |
376 | ||
377 | num2 = strtol(end+1, &end, 10); | |
378 | num3 = -1; | |
379 | if (*end == c && isdigit(end[1])) | |
380 | num3 = strtol(end+1, &end, 10); | |
381 | ||
382 | /* Time? Date? */ | |
89967023 | 383 | switch (c) { |
198b0fb6 LT |
384 | case ':': |
385 | if (num3 < 0) | |
386 | num3 = 0; | |
387 | if (num < 25 && num2 >= 0 && num2 < 60 && num3 >= 0 && num3 <= 60) { | |
388 | tm->tm_hour = num; | |
389 | tm->tm_min = num2; | |
390 | tm->tm_sec = num3; | |
89967023 LT |
391 | break; |
392 | } | |
198b0fb6 | 393 | return 0; |
89967023 LT |
394 | |
395 | case '-': | |
396 | case '/': | |
38035cf4 JH |
397 | case '.': |
398 | now = time(NULL); | |
399 | refuse_future = NULL; | |
400 | if (gmtime_r(&now, &now_tm)) | |
401 | refuse_future = &now_tm; | |
402 | ||
198b0fb6 LT |
403 | if (num > 70) { |
404 | /* yyyy-mm-dd? */ | |
38035cf4 | 405 | if (is_date(num, num2, num3, refuse_future, now, tm)) |
198b0fb6 LT |
406 | break; |
407 | /* yyyy-dd-mm? */ | |
38035cf4 | 408 | if (is_date(num, num3, num2, refuse_future, now, tm)) |
89967023 | 409 | break; |
198b0fb6 | 410 | } |
38035cf4 JH |
411 | /* Our eastern European friends say dd.mm.yy[yy] |
412 | * is the norm there, so giving precedence to | |
413 | * mm/dd/yy[yy] form only when separator is not '.' | |
414 | */ | |
415 | if (c != '.' && | |
416 | is_date(num3, num, num2, refuse_future, now, tm)) | |
417 | break; | |
418 | /* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */ | |
419 | if (is_date(num3, num2, num, refuse_future, now, tm)) | |
89967023 | 420 | break; |
38035cf4 JH |
421 | /* Funny European mm.dd.yy */ |
422 | if (c == '.' && | |
423 | is_date(num3, num, num2, refuse_future, now, tm)) | |
198b0fb6 LT |
424 | break; |
425 | return 0; | |
426 | } | |
427 | return end - date; | |
428 | } | |
429 | ||
36e4986f LT |
430 | /* |
431 | * Have we filled in any part of the time/date yet? | |
432 | * We just do a binary 'and' to see if the sign bit | |
433 | * is set in all the values. | |
434 | */ | |
9f2b6d29 LT |
435 | static inline int nodate(struct tm *tm) |
436 | { | |
36e4986f LT |
437 | return (tm->tm_year & |
438 | tm->tm_mon & | |
439 | tm->tm_mday & | |
440 | tm->tm_hour & | |
441 | tm->tm_min & | |
442 | tm->tm_sec) < 0; | |
9f2b6d29 LT |
443 | } |
444 | ||
198b0fb6 | 445 | /* |
a6080a0a | 446 | * We've seen a digit. Time? Year? Date? |
198b0fb6 | 447 | */ |
26a2d8ae | 448 | static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt) |
198b0fb6 LT |
449 | { |
450 | int n; | |
451 | char *end; | |
452 | unsigned long num; | |
453 | ||
454 | num = strtoul(date, &end, 10); | |
455 | ||
456 | /* | |
a1a5a634 JS |
457 | * Seconds since 1970? We trigger on that for any numbers with |
458 | * more than 8 digits. This is because we don't want to rule out | |
459 | * numbers like 20070606 as a YYYYMMDD date. | |
198b0fb6 | 460 | */ |
9f2b6d29 | 461 | if (num >= 100000000 && nodate(tm)) { |
198b0fb6 | 462 | time_t time = num; |
9cb480f2 JH |
463 | if (gmtime_r(&time, tm)) { |
464 | *tm_gmt = 1; | |
198b0fb6 | 465 | return end - date; |
9cb480f2 | 466 | } |
198b0fb6 LT |
467 | } |
468 | ||
469 | /* | |
38035cf4 | 470 | * Check for special formats: num[-.:/]num[same]num |
198b0fb6 LT |
471 | */ |
472 | switch (*end) { | |
473 | case ':': | |
38035cf4 | 474 | case '.': |
198b0fb6 LT |
475 | case '/': |
476 | case '-': | |
477 | if (isdigit(end[1])) { | |
478 | int match = match_multi_number(num, *end, date, end, tm); | |
479 | if (match) | |
480 | return match; | |
89967023 LT |
481 | } |
482 | } | |
198b0fb6 LT |
483 | |
484 | /* | |
485 | * None of the special formats? Try to guess what | |
486 | * the number meant. We use the number of digits | |
487 | * to make a more educated guess.. | |
488 | */ | |
489 | n = 0; | |
490 | do { | |
491 | n++; | |
492 | } while (isdigit(date[n])); | |
493 | ||
494 | /* Four-digit year or a timezone? */ | |
495 | if (n == 4) { | |
7122f82f | 496 | if (num <= 1400 && *offset == -1) { |
198b0fb6 LT |
497 | unsigned int minutes = num % 100; |
498 | unsigned int hours = num / 100; | |
499 | *offset = hours*60 + minutes; | |
500 | } else if (num > 1900 && num < 2100) | |
501 | tm->tm_year = num - 1900; | |
502 | return n; | |
503 | } | |
504 | ||
9f2b6d29 LT |
505 | /* |
506 | * Ignore lots of numerals. We took care of 4-digit years above. | |
507 | * Days or months must be one or two digits. | |
508 | */ | |
509 | if (n > 2) | |
510 | return n; | |
511 | ||
198b0fb6 LT |
512 | /* |
513 | * NOTE! We will give precedence to day-of-month over month or | |
82f9d58a | 514 | * year numbers in the 1-12 range. So 05 is always "mday 5", |
198b0fb6 LT |
515 | * unless we already have a mday.. |
516 | * | |
517 | * IOW, 01 Apr 05 parses as "April 1st, 2005". | |
518 | */ | |
519 | if (num > 0 && num < 32 && tm->tm_mday < 0) { | |
520 | tm->tm_mday = num; | |
521 | return n; | |
522 | } | |
523 | ||
524 | /* Two-digit year? */ | |
525 | if (n == 2 && tm->tm_year < 0) { | |
526 | if (num < 10 && tm->tm_mday >= 0) { | |
527 | tm->tm_year = num + 100; | |
528 | return n; | |
529 | } | |
530 | if (num >= 70) { | |
531 | tm->tm_year = num; | |
532 | return n; | |
533 | } | |
534 | } | |
535 | ||
90290552 | 536 | if (num > 0 && num < 13 && tm->tm_mon < 0) |
198b0fb6 | 537 | tm->tm_mon = num-1; |
a6080a0a | 538 | |
198b0fb6 | 539 | return n; |
89967023 | 540 | } |
ecee9d9e | 541 | |
26a2d8ae | 542 | static int match_tz(const char *date, int *offp) |
89967023 LT |
543 | { |
544 | char *end; | |
545 | int offset = strtoul(date+1, &end, 10); | |
546 | int min, hour; | |
198b0fb6 | 547 | int n = end - date - 1; |
ecee9d9e | 548 | |
89967023 LT |
549 | min = offset % 100; |
550 | hour = offset / 100; | |
ecee9d9e | 551 | |
198b0fb6 LT |
552 | /* |
553 | * Don't accept any random crap.. At least 3 digits, and | |
554 | * a valid minute. We might want to check that the minutes | |
555 | * are divisible by 30 or something too. | |
556 | */ | |
68849b54 LT |
557 | if (min < 60 && n > 2) { |
558 | offset = hour*60+min; | |
559 | if (*date == '-') | |
560 | offset = -offset; | |
ecee9d9e | 561 | |
68849b54 LT |
562 | *offp = offset; |
563 | } | |
89967023 LT |
564 | return end - date; |
565 | } | |
ecee9d9e | 566 | |
01c6ad29 LT |
567 | static int date_string(unsigned long date, int offset, char *buf, int len) |
568 | { | |
569 | int sign = '+'; | |
570 | ||
571 | if (offset < 0) { | |
572 | offset = -offset; | |
573 | sign = '-'; | |
574 | } | |
575 | return snprintf(buf, len, "%lu %c%02d%02d", date, sign, offset / 60, offset % 60); | |
576 | } | |
577 | ||
89967023 LT |
578 | /* Gr. strptime is crap for this; it doesn't have a way to require RFC2822 |
579 | (i.e. English) day/month names, and it doesn't work correctly with %z. */ | |
2a39064c | 580 | int parse_date(const char *date, char *result, int maxlen) |
89967023 LT |
581 | { |
582 | struct tm tm; | |
01c6ad29 | 583 | int offset, tm_gmt; |
89967023 | 584 | time_t then; |
ecee9d9e | 585 | |
89967023 LT |
586 | memset(&tm, 0, sizeof(tm)); |
587 | tm.tm_year = -1; | |
588 | tm.tm_mon = -1; | |
589 | tm.tm_mday = -1; | |
eaa85129 | 590 | tm.tm_isdst = -1; |
36e4986f LT |
591 | tm.tm_hour = -1; |
592 | tm.tm_min = -1; | |
593 | tm.tm_sec = -1; | |
eaa85129 | 594 | offset = -1; |
9cb480f2 | 595 | tm_gmt = 0; |
89967023 LT |
596 | |
597 | for (;;) { | |
598 | int match = 0; | |
599 | unsigned char c = *date; | |
600 | ||
601 | /* Stop at end of string or newline */ | |
602 | if (!c || c == '\n') | |
603 | break; | |
604 | ||
605 | if (isalpha(c)) | |
606 | match = match_alpha(date, &tm, &offset); | |
607 | else if (isdigit(c)) | |
9cb480f2 | 608 | match = match_digit(date, &tm, &offset, &tm_gmt); |
89967023 LT |
609 | else if ((c == '-' || c == '+') && isdigit(date[1])) |
610 | match = match_tz(date, &offset); | |
611 | ||
612 | if (!match) { | |
613 | /* BAD CRAP */ | |
614 | match = 1; | |
a6080a0a | 615 | } |
89967023 LT |
616 | |
617 | date += match; | |
618 | } | |
ecee9d9e | 619 | |
eaa85129 | 620 | /* mktime uses local timezone */ |
bb5799d6 | 621 | then = tm_to_time_t(&tm); |
eaa85129 LT |
622 | if (offset == -1) |
623 | offset = (then - mktime(&tm)) / 60; | |
624 | ||
ecee9d9e | 625 | if (then == -1) |
2a39064c | 626 | return -1; |
ecee9d9e | 627 | |
9cb480f2 JH |
628 | if (!tm_gmt) |
629 | then -= offset * 60; | |
01c6ad29 | 630 | return date_string(then, offset, result, maxlen); |
ecee9d9e ET |
631 | } |
632 | ||
856665f8 AP |
633 | enum date_mode parse_date_format(const char *format) |
634 | { | |
635 | if (!strcmp(format, "relative")) | |
636 | return DATE_RELATIVE; | |
637 | else if (!strcmp(format, "iso8601") || | |
638 | !strcmp(format, "iso")) | |
639 | return DATE_ISO8601; | |
640 | else if (!strcmp(format, "rfc2822") || | |
641 | !strcmp(format, "rfc")) | |
642 | return DATE_RFC2822; | |
643 | else if (!strcmp(format, "short")) | |
644 | return DATE_SHORT; | |
645 | else if (!strcmp(format, "local")) | |
646 | return DATE_LOCAL; | |
647 | else if (!strcmp(format, "default")) | |
648 | return DATE_NORMAL; | |
7dff9b30 LT |
649 | else if (!strcmp(format, "raw")) |
650 | return DATE_RAW; | |
856665f8 AP |
651 | else |
652 | die("unknown date format %s", format); | |
653 | } | |
654 | ||
ecee9d9e ET |
655 | void datestamp(char *buf, int bufsize) |
656 | { | |
657 | time_t now; | |
658 | int offset; | |
659 | ||
660 | time(&now); | |
661 | ||
bb5799d6 | 662 | offset = tm_to_time_t(localtime(&now)) - now; |
ecee9d9e ET |
663 | offset /= 60; |
664 | ||
01c6ad29 | 665 | date_string(now, offset, buf, bufsize); |
ecee9d9e | 666 | } |
3c07b1d1 | 667 | |
90290552 LT |
668 | /* |
669 | * Relative time update (eg "2 days ago"). If we haven't set the time | |
670 | * yet, we need to set it from current time. | |
671 | */ | |
672 | static unsigned long update_tm(struct tm *tm, struct tm *now, unsigned long sec) | |
3c07b1d1 | 673 | { |
90290552 LT |
674 | time_t n; |
675 | ||
676 | if (tm->tm_mday < 0) | |
677 | tm->tm_mday = now->tm_mday; | |
678 | if (tm->tm_mon < 0) | |
679 | tm->tm_mon = now->tm_mon; | |
680 | if (tm->tm_year < 0) { | |
681 | tm->tm_year = now->tm_year; | |
682 | if (tm->tm_mon > now->tm_mon) | |
683 | tm->tm_year--; | |
684 | } | |
685 | ||
686 | n = mktime(tm) - sec; | |
3c07b1d1 | 687 | localtime_r(&n, tm); |
90290552 | 688 | return n; |
3c07b1d1 LT |
689 | } |
690 | ||
90290552 | 691 | static void date_yesterday(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 692 | { |
90290552 | 693 | update_tm(tm, now, 24*60*60); |
a8aca418 LT |
694 | } |
695 | ||
90290552 | 696 | static void date_time(struct tm *tm, struct tm *now, int hour) |
a8aca418 LT |
697 | { |
698 | if (tm->tm_hour < hour) | |
90290552 | 699 | date_yesterday(tm, now, NULL); |
a8aca418 LT |
700 | tm->tm_hour = hour; |
701 | tm->tm_min = 0; | |
702 | tm->tm_sec = 0; | |
703 | } | |
704 | ||
90290552 | 705 | static void date_midnight(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 706 | { |
90290552 | 707 | date_time(tm, now, 0); |
a8aca418 LT |
708 | } |
709 | ||
90290552 | 710 | static void date_noon(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 711 | { |
90290552 | 712 | date_time(tm, now, 12); |
a8aca418 LT |
713 | } |
714 | ||
90290552 | 715 | static void date_tea(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 716 | { |
90290552 | 717 | date_time(tm, now, 17); |
a8aca418 LT |
718 | } |
719 | ||
90290552 | 720 | static void date_pm(struct tm *tm, struct tm *now, int *num) |
393d340e | 721 | { |
18b633ca | 722 | int hour, n = *num; |
393d340e LT |
723 | *num = 0; |
724 | ||
18b633ca LT |
725 | hour = tm->tm_hour; |
726 | if (n) { | |
727 | hour = n; | |
393d340e LT |
728 | tm->tm_min = 0; |
729 | tm->tm_sec = 0; | |
730 | } | |
18b633ca | 731 | tm->tm_hour = (hour % 12) + 12; |
393d340e LT |
732 | } |
733 | ||
90290552 | 734 | static void date_am(struct tm *tm, struct tm *now, int *num) |
393d340e | 735 | { |
18b633ca | 736 | int hour, n = *num; |
393d340e LT |
737 | *num = 0; |
738 | ||
18b633ca LT |
739 | hour = tm->tm_hour; |
740 | if (n) { | |
741 | hour = n; | |
393d340e LT |
742 | tm->tm_min = 0; |
743 | tm->tm_sec = 0; | |
744 | } | |
18b633ca | 745 | tm->tm_hour = (hour % 12); |
393d340e LT |
746 | } |
747 | ||
90290552 | 748 | static void date_never(struct tm *tm, struct tm *now, int *num) |
af66366a | 749 | { |
8c6b5786 OM |
750 | time_t n = 0; |
751 | localtime_r(&n, tm); | |
af66366a JS |
752 | } |
753 | ||
a8aca418 LT |
754 | static const struct special { |
755 | const char *name; | |
90290552 | 756 | void (*fn)(struct tm *, struct tm *, int *); |
a8aca418 LT |
757 | } special[] = { |
758 | { "yesterday", date_yesterday }, | |
759 | { "noon", date_noon }, | |
760 | { "midnight", date_midnight }, | |
761 | { "tea", date_tea }, | |
393d340e LT |
762 | { "PM", date_pm }, |
763 | { "AM", date_am }, | |
af66366a | 764 | { "never", date_never }, |
a8aca418 LT |
765 | { NULL } |
766 | }; | |
767 | ||
3c07b1d1 LT |
768 | static const char *number_name[] = { |
769 | "zero", "one", "two", "three", "four", | |
770 | "five", "six", "seven", "eight", "nine", "ten", | |
771 | }; | |
772 | ||
a8aca418 | 773 | static const struct typelen { |
3c07b1d1 LT |
774 | const char *type; |
775 | int length; | |
776 | } typelen[] = { | |
777 | { "seconds", 1 }, | |
778 | { "minutes", 60 }, | |
779 | { "hours", 60*60 }, | |
780 | { "days", 24*60*60 }, | |
781 | { "weeks", 7*24*60*60 }, | |
782 | { NULL } | |
a6080a0a | 783 | }; |
3c07b1d1 | 784 | |
90290552 | 785 | static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm *now, int *num) |
3c07b1d1 | 786 | { |
a8aca418 LT |
787 | const struct typelen *tl; |
788 | const struct special *s; | |
3c07b1d1 | 789 | const char *end = date; |
5df7dbba | 790 | int i; |
3c07b1d1 | 791 | |
5df7dbba PH |
792 | while (isalpha(*++end)); |
793 | ; | |
3c07b1d1 LT |
794 | |
795 | for (i = 0; i < 12; i++) { | |
796 | int match = match_string(date, month_names[i]); | |
797 | if (match >= 3) { | |
798 | tm->tm_mon = i; | |
799 | return end; | |
800 | } | |
801 | } | |
802 | ||
a8aca418 LT |
803 | for (s = special; s->name; s++) { |
804 | int len = strlen(s->name); | |
805 | if (match_string(date, s->name) == len) { | |
90290552 | 806 | s->fn(tm, now, num); |
a8aca418 LT |
807 | return end; |
808 | } | |
3c07b1d1 LT |
809 | } |
810 | ||
811 | if (!*num) { | |
812 | for (i = 1; i < 11; i++) { | |
813 | int len = strlen(number_name[i]); | |
814 | if (match_string(date, number_name[i]) == len) { | |
815 | *num = i; | |
816 | return end; | |
817 | } | |
818 | } | |
819 | if (match_string(date, "last") == 4) | |
820 | *num = 1; | |
821 | return end; | |
822 | } | |
823 | ||
824 | tl = typelen; | |
825 | while (tl->type) { | |
826 | int len = strlen(tl->type); | |
827 | if (match_string(date, tl->type) >= len-1) { | |
90290552 | 828 | update_tm(tm, now, tl->length * *num); |
3c07b1d1 LT |
829 | *num = 0; |
830 | return end; | |
831 | } | |
832 | tl++; | |
833 | } | |
834 | ||
6b7b0427 LT |
835 | for (i = 0; i < 7; i++) { |
836 | int match = match_string(date, weekday_names[i]); | |
837 | if (match >= 3) { | |
838 | int diff, n = *num -1; | |
839 | *num = 0; | |
840 | ||
841 | diff = tm->tm_wday - i; | |
842 | if (diff <= 0) | |
843 | n++; | |
844 | diff += 7*n; | |
845 | ||
90290552 | 846 | update_tm(tm, now, diff * 24 * 60 * 60); |
6b7b0427 LT |
847 | return end; |
848 | } | |
849 | } | |
850 | ||
3c07b1d1 LT |
851 | if (match_string(date, "months") >= 5) { |
852 | int n = tm->tm_mon - *num; | |
853 | *num = 0; | |
854 | while (n < 0) { | |
855 | n += 12; | |
856 | tm->tm_year--; | |
857 | } | |
858 | tm->tm_mon = n; | |
859 | return end; | |
860 | } | |
861 | ||
862 | if (match_string(date, "years") >= 4) { | |
863 | tm->tm_year -= *num; | |
864 | *num = 0; | |
865 | return end; | |
866 | } | |
867 | ||
868 | return end; | |
869 | } | |
870 | ||
e92a54d9 LT |
871 | static const char *approxidate_digit(const char *date, struct tm *tm, int *num) |
872 | { | |
873 | char *end; | |
874 | unsigned long number = strtoul(date, &end, 10); | |
875 | ||
393d340e LT |
876 | switch (*end) { |
877 | case ':': | |
878 | case '.': | |
879 | case '/': | |
880 | case '-': | |
881 | if (isdigit(end[1])) { | |
882 | int match = match_multi_number(number, *end, date, end, tm); | |
883 | if (match) | |
884 | return date + match; | |
885 | } | |
886 | } | |
887 | ||
9f2b6d29 LT |
888 | /* Accept zero-padding only for small numbers ("Dec 02", never "Dec 0002") */ |
889 | if (date[0] != '0' || end - date <= 2) | |
890 | *num = number; | |
e92a54d9 LT |
891 | return end; |
892 | } | |
893 | ||
90290552 LT |
894 | /* |
895 | * Do we have a pending number at the end, or when | |
896 | * we see a new one? Let's assume it's a month day, | |
897 | * as in "Dec 6, 1992" | |
898 | */ | |
899 | static void pending_number(struct tm *tm, int *num) | |
900 | { | |
901 | int number = *num; | |
902 | ||
903 | if (number) { | |
904 | *num = 0; | |
905 | if (tm->tm_mday < 0 && number < 32) | |
906 | tm->tm_mday = number; | |
36e4986f LT |
907 | else if (tm->tm_mon < 0 && number < 13) |
908 | tm->tm_mon = number-1; | |
909 | else if (tm->tm_year < 0) { | |
910 | if (number > 1969 && number < 2100) | |
911 | tm->tm_year = number - 1900; | |
912 | else if (number > 69 && number < 100) | |
913 | tm->tm_year = number; | |
914 | else if (number < 38) | |
915 | tm->tm_year = 100 + number; | |
916 | /* We screw up for number = 00 ? */ | |
917 | } | |
90290552 LT |
918 | } |
919 | } | |
920 | ||
3c07b1d1 LT |
921 | unsigned long approxidate(const char *date) |
922 | { | |
923 | int number = 0; | |
924 | struct tm tm, now; | |
925 | struct timeval tv; | |
f697b33b | 926 | time_t time_sec; |
3c07b1d1 LT |
927 | char buffer[50]; |
928 | ||
929 | if (parse_date(date, buffer, sizeof(buffer)) > 0) | |
930 | return strtoul(buffer, NULL, 10); | |
931 | ||
932 | gettimeofday(&tv, NULL); | |
f697b33b BA |
933 | time_sec = tv.tv_sec; |
934 | localtime_r(&time_sec, &tm); | |
3c07b1d1 | 935 | now = tm; |
90290552 LT |
936 | |
937 | tm.tm_year = -1; | |
938 | tm.tm_mon = -1; | |
939 | tm.tm_mday = -1; | |
940 | ||
3c07b1d1 LT |
941 | for (;;) { |
942 | unsigned char c = *date; | |
943 | if (!c) | |
944 | break; | |
945 | date++; | |
946 | if (isdigit(c)) { | |
90290552 | 947 | pending_number(&tm, &number); |
e92a54d9 | 948 | date = approxidate_digit(date-1, &tm, &number); |
3c07b1d1 LT |
949 | continue; |
950 | } | |
951 | if (isalpha(c)) | |
90290552 | 952 | date = approxidate_alpha(date-1, &tm, &now, &number); |
3c07b1d1 | 953 | } |
90290552 LT |
954 | pending_number(&tm, &number); |
955 | return update_tm(&tm, &now, 0); | |
3c07b1d1 | 956 | } |