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Commit | Line | Data |
---|---|---|
ecee9d9e ET |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
6 | ||
ecee9d9e | 7 | #include <time.h> |
3c07b1d1 | 8 | #include <sys/time.h> |
ecee9d9e | 9 | |
e99d59ff LT |
10 | #include "cache.h" |
11 | ||
ecee9d9e ET |
12 | static time_t my_mktime(struct tm *tm) |
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--; | |
27 | return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24*60*60UL + | |
28 | tm->tm_hour * 60*60 + tm->tm_min * 60 + tm->tm_sec; | |
29 | } | |
30 | ||
31 | static const char *month_names[] = { | |
89967023 LT |
32 | "January", "February", "March", "April", "May", "June", |
33 | "July", "August", "September", "October", "November", "December" | |
ecee9d9e ET |
34 | }; |
35 | ||
36 | static const char *weekday_names[] = { | |
6b7b0427 | 37 | "Sundays", "Mondays", "Tuesdays", "Wednesdays", "Thursdays", "Fridays", "Saturdays" |
ecee9d9e ET |
38 | }; |
39 | ||
f80cd783 LT |
40 | /* |
41 | * The "tz" thing is passed in as this strange "decimal parse of tz" | |
42 | * thing, which means that tz -0100 is passed in as the integer -100, | |
43 | * even though it means "sixty minutes off" | |
44 | */ | |
45 | const char *show_date(unsigned long time, int tz) | |
46 | { | |
47 | struct tm *tm; | |
48 | time_t t; | |
49 | static char timebuf[200]; | |
50 | int minutes; | |
51 | ||
52 | minutes = tz < 0 ? -tz : tz; | |
fbab835c | 53 | minutes = (minutes / 100)*60 + (minutes % 100); |
f80cd783 | 54 | minutes = tz < 0 ? -minutes : minutes; |
fbab835c | 55 | t = time + minutes * 60; |
f80cd783 LT |
56 | tm = gmtime(&t); |
57 | if (!tm) | |
58 | return NULL; | |
59 | sprintf(timebuf, "%.3s %.3s %d %02d:%02d:%02d %d %+05d", | |
60 | weekday_names[tm->tm_wday], | |
61 | month_names[tm->tm_mon], | |
62 | tm->tm_mday, | |
63 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
64 | tm->tm_year + 1900, tz); | |
65 | return timebuf; | |
66 | } | |
67 | ||
89967023 LT |
68 | /* |
69 | * Check these. And note how it doesn't do the summer-time conversion. | |
70 | * | |
71 | * In my world, it's always summer, and things are probably a bit off | |
72 | * in other ways too. | |
73 | */ | |
74 | static const struct { | |
75 | const char *name; | |
76 | int offset; | |
5e2a78a4 | 77 | int dst; |
89967023 | 78 | } timezone_names[] = { |
5e2a78a4 LT |
79 | { "IDLW", -12, 0, }, /* International Date Line West */ |
80 | { "NT", -11, 0, }, /* Nome */ | |
81 | { "CAT", -10, 0, }, /* Central Alaska */ | |
82 | { "HST", -10, 0, }, /* Hawaii Standard */ | |
83 | { "HDT", -10, 1, }, /* Hawaii Daylight */ | |
84 | { "YST", -9, 0, }, /* Yukon Standard */ | |
85 | { "YDT", -9, 1, }, /* Yukon Daylight */ | |
86 | { "PST", -8, 0, }, /* Pacific Standard */ | |
87 | { "PDT", -8, 1, }, /* Pacific Daylight */ | |
88 | { "MST", -7, 0, }, /* Mountain Standard */ | |
89 | { "MDT", -7, 1, }, /* Mountain Daylight */ | |
90 | { "CST", -6, 0, }, /* Central Standard */ | |
91 | { "CDT", -6, 1, }, /* Central Daylight */ | |
92 | { "EST", -5, 0, }, /* Eastern Standard */ | |
93 | { "EDT", -5, 1, }, /* Eastern Daylight */ | |
94 | { "AST", -3, 0, }, /* Atlantic Standard */ | |
95 | { "ADT", -3, 1, }, /* Atlantic Daylight */ | |
96 | { "WAT", -1, 0, }, /* West Africa */ | |
97 | ||
98 | { "GMT", 0, 0, }, /* Greenwich Mean */ | |
99 | { "UTC", 0, 0, }, /* Universal (Coordinated) */ | |
100 | ||
101 | { "WET", 0, 0, }, /* Western European */ | |
102 | { "BST", 0, 1, }, /* British Summer */ | |
103 | { "CET", +1, 0, }, /* Central European */ | |
104 | { "MET", +1, 0, }, /* Middle European */ | |
105 | { "MEWT", +1, 0, }, /* Middle European Winter */ | |
106 | { "MEST", +1, 1, }, /* Middle European Summer */ | |
107 | { "CEST", +1, 1, }, /* Central European Summer */ | |
108 | { "MESZ", +1, 1, }, /* Middle European Summer */ | |
109 | { "FWT", +1, 0, }, /* French Winter */ | |
110 | { "FST", +1, 1, }, /* French Summer */ | |
111 | { "EET", +2, 0, }, /* Eastern Europe, USSR Zone 1 */ | |
92e2311b | 112 | { "EEST", +2, 1, }, /* Eastern European Daylight */ |
5e2a78a4 LT |
113 | { "WAST", +7, 0, }, /* West Australian Standard */ |
114 | { "WADT", +7, 1, }, /* West Australian Daylight */ | |
115 | { "CCT", +8, 0, }, /* China Coast, USSR Zone 7 */ | |
116 | { "JST", +9, 0, }, /* Japan Standard, USSR Zone 8 */ | |
117 | { "EAST", +10, 0, }, /* Eastern Australian Standard */ | |
118 | { "EADT", +10, 1, }, /* Eastern Australian Daylight */ | |
119 | { "GST", +10, 0, }, /* Guam Standard, USSR Zone 9 */ | |
120 | { "NZT", +11, 0, }, /* New Zealand */ | |
121 | { "NZST", +11, 0, }, /* New Zealand Standard */ | |
122 | { "NZDT", +11, 1, }, /* New Zealand Daylight */ | |
123 | { "IDLE", +12, 0, }, /* International Date Line East */ | |
89967023 | 124 | }; |
ecee9d9e | 125 | |
89967023 | 126 | static int match_string(const char *date, const char *str) |
ecee9d9e | 127 | { |
89967023 LT |
128 | int i = 0; |
129 | ||
130 | for (i = 0; *date; date++, str++, i++) { | |
131 | if (*date == *str) | |
132 | continue; | |
133 | if (toupper(*date) == toupper(*str)) | |
134 | continue; | |
135 | if (!isalnum(*date)) | |
136 | break; | |
137 | return 0; | |
138 | } | |
139 | return i; | |
ecee9d9e ET |
140 | } |
141 | ||
68849b54 LT |
142 | static int skip_alpha(const char *date) |
143 | { | |
144 | int i = 0; | |
145 | do { | |
146 | i++; | |
147 | } while (isalpha(date[i])); | |
148 | return i; | |
149 | } | |
150 | ||
89967023 LT |
151 | /* |
152 | * Parse month, weekday, or timezone name | |
153 | */ | |
154 | static int match_alpha(const char *date, struct tm *tm, int *offset) | |
ecee9d9e | 155 | { |
89967023 | 156 | int i; |
ecee9d9e | 157 | |
89967023 LT |
158 | for (i = 0; i < 12; i++) { |
159 | int match = match_string(date, month_names[i]); | |
160 | if (match >= 3) { | |
161 | tm->tm_mon = i; | |
162 | return match; | |
ecee9d9e | 163 | } |
89967023 | 164 | } |
ecee9d9e | 165 | |
89967023 LT |
166 | for (i = 0; i < 7; i++) { |
167 | int match = match_string(date, weekday_names[i]); | |
168 | if (match >= 3) { | |
169 | tm->tm_wday = i; | |
170 | return match; | |
171 | } | |
172 | } | |
ecee9d9e | 173 | |
b4f2a6ac | 174 | for (i = 0; i < ARRAY_SIZE(timezone_names); i++) { |
89967023 LT |
175 | int match = match_string(date, timezone_names[i].name); |
176 | if (match >= 3) { | |
5e2a78a4 LT |
177 | int off = timezone_names[i].offset; |
178 | ||
179 | /* This is bogus, but we like summer */ | |
180 | off += timezone_names[i].dst; | |
181 | ||
92e2311b LT |
182 | /* Only use the tz name offset if we don't have anything better */ |
183 | if (*offset == -1) | |
184 | *offset = 60*off; | |
185 | ||
89967023 | 186 | return match; |
ecee9d9e ET |
187 | } |
188 | } | |
ecee9d9e | 189 | |
68849b54 LT |
190 | if (match_string(date, "PM") == 2) { |
191 | if (tm->tm_hour > 0 && tm->tm_hour < 12) | |
192 | tm->tm_hour += 12; | |
193 | return 2; | |
194 | } | |
195 | ||
89967023 | 196 | /* BAD CRAP */ |
68849b54 | 197 | return skip_alpha(date); |
89967023 | 198 | } |
ecee9d9e | 199 | |
38035cf4 | 200 | static int is_date(int year, int month, int day, struct tm *now_tm, time_t now, struct tm *tm) |
89967023 | 201 | { |
198b0fb6 | 202 | if (month > 0 && month < 13 && day > 0 && day < 32) { |
38035cf4 JH |
203 | struct tm check = *tm; |
204 | struct tm *r = (now_tm ? &check : tm); | |
205 | time_t specified; | |
206 | ||
207 | r->tm_mon = month - 1; | |
208 | r->tm_mday = day; | |
198b0fb6 | 209 | if (year == -1) { |
38035cf4 JH |
210 | if (!now_tm) |
211 | return 1; | |
212 | r->tm_year = now_tm->tm_year; | |
89967023 | 213 | } |
38035cf4 JH |
214 | else if (year >= 1970 && year < 2100) |
215 | r->tm_year = year - 1900; | |
216 | else if (year > 70 && year < 100) | |
217 | r->tm_year = year; | |
218 | else if (year < 38) | |
219 | r->tm_year = year + 100; | |
220 | else | |
198b0fb6 | 221 | return 0; |
38035cf4 JH |
222 | if (!now_tm) |
223 | return 1; | |
224 | ||
225 | specified = my_mktime(r); | |
198b0fb6 | 226 | |
38035cf4 JH |
227 | /* Be it commit time or author time, it does not make |
228 | * sense to specify timestamp way into the future. Make | |
229 | * sure it is not later than ten days from now... | |
230 | */ | |
231 | if (now + 10*24*3600 < specified) | |
232 | return 0; | |
233 | tm->tm_mon = r->tm_mon; | |
234 | tm->tm_mday = r->tm_mday; | |
235 | if (year != -1) | |
236 | tm->tm_year = r->tm_year; | |
198b0fb6 | 237 | return 1; |
89967023 | 238 | } |
198b0fb6 LT |
239 | return 0; |
240 | } | |
ecee9d9e | 241 | |
26a2d8ae | 242 | static int match_multi_number(unsigned long num, char c, const char *date, char *end, struct tm *tm) |
198b0fb6 | 243 | { |
38035cf4 JH |
244 | time_t now; |
245 | struct tm now_tm; | |
246 | struct tm *refuse_future; | |
198b0fb6 LT |
247 | long num2, num3; |
248 | ||
249 | num2 = strtol(end+1, &end, 10); | |
250 | num3 = -1; | |
251 | if (*end == c && isdigit(end[1])) | |
252 | num3 = strtol(end+1, &end, 10); | |
253 | ||
254 | /* Time? Date? */ | |
89967023 | 255 | switch (c) { |
198b0fb6 LT |
256 | case ':': |
257 | if (num3 < 0) | |
258 | num3 = 0; | |
259 | if (num < 25 && num2 >= 0 && num2 < 60 && num3 >= 0 && num3 <= 60) { | |
260 | tm->tm_hour = num; | |
261 | tm->tm_min = num2; | |
262 | tm->tm_sec = num3; | |
89967023 LT |
263 | break; |
264 | } | |
198b0fb6 | 265 | return 0; |
89967023 LT |
266 | |
267 | case '-': | |
268 | case '/': | |
38035cf4 JH |
269 | case '.': |
270 | now = time(NULL); | |
271 | refuse_future = NULL; | |
272 | if (gmtime_r(&now, &now_tm)) | |
273 | refuse_future = &now_tm; | |
274 | ||
198b0fb6 LT |
275 | if (num > 70) { |
276 | /* yyyy-mm-dd? */ | |
38035cf4 | 277 | if (is_date(num, num2, num3, refuse_future, now, tm)) |
198b0fb6 LT |
278 | break; |
279 | /* yyyy-dd-mm? */ | |
38035cf4 | 280 | if (is_date(num, num3, num2, refuse_future, now, tm)) |
89967023 | 281 | break; |
198b0fb6 | 282 | } |
38035cf4 JH |
283 | /* Our eastern European friends say dd.mm.yy[yy] |
284 | * is the norm there, so giving precedence to | |
285 | * mm/dd/yy[yy] form only when separator is not '.' | |
286 | */ | |
287 | if (c != '.' && | |
288 | is_date(num3, num, num2, refuse_future, now, tm)) | |
289 | break; | |
290 | /* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */ | |
291 | if (is_date(num3, num2, num, refuse_future, now, tm)) | |
89967023 | 292 | break; |
38035cf4 JH |
293 | /* Funny European mm.dd.yy */ |
294 | if (c == '.' && | |
295 | is_date(num3, num, num2, refuse_future, now, tm)) | |
198b0fb6 LT |
296 | break; |
297 | return 0; | |
298 | } | |
299 | return end - date; | |
300 | } | |
301 | ||
302 | /* | |
303 | * We've seen a digit. Time? Year? Date? | |
304 | */ | |
26a2d8ae | 305 | static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt) |
198b0fb6 LT |
306 | { |
307 | int n; | |
308 | char *end; | |
309 | unsigned long num; | |
310 | ||
311 | num = strtoul(date, &end, 10); | |
312 | ||
313 | /* | |
314 | * Seconds since 1970? We trigger on that for anything after Jan 1, 2000 | |
315 | */ | |
316 | if (num > 946684800) { | |
317 | time_t time = num; | |
9cb480f2 JH |
318 | if (gmtime_r(&time, tm)) { |
319 | *tm_gmt = 1; | |
198b0fb6 | 320 | return end - date; |
9cb480f2 | 321 | } |
198b0fb6 LT |
322 | } |
323 | ||
324 | /* | |
38035cf4 | 325 | * Check for special formats: num[-.:/]num[same]num |
198b0fb6 LT |
326 | */ |
327 | switch (*end) { | |
328 | case ':': | |
38035cf4 | 329 | case '.': |
198b0fb6 LT |
330 | case '/': |
331 | case '-': | |
332 | if (isdigit(end[1])) { | |
333 | int match = match_multi_number(num, *end, date, end, tm); | |
334 | if (match) | |
335 | return match; | |
89967023 LT |
336 | } |
337 | } | |
198b0fb6 LT |
338 | |
339 | /* | |
340 | * None of the special formats? Try to guess what | |
341 | * the number meant. We use the number of digits | |
342 | * to make a more educated guess.. | |
343 | */ | |
344 | n = 0; | |
345 | do { | |
346 | n++; | |
347 | } while (isdigit(date[n])); | |
348 | ||
349 | /* Four-digit year or a timezone? */ | |
350 | if (n == 4) { | |
351 | if (num <= 1200 && *offset == -1) { | |
352 | unsigned int minutes = num % 100; | |
353 | unsigned int hours = num / 100; | |
354 | *offset = hours*60 + minutes; | |
355 | } else if (num > 1900 && num < 2100) | |
356 | tm->tm_year = num - 1900; | |
357 | return n; | |
358 | } | |
359 | ||
360 | /* | |
361 | * NOTE! We will give precedence to day-of-month over month or | |
82f9d58a | 362 | * year numbers in the 1-12 range. So 05 is always "mday 5", |
198b0fb6 LT |
363 | * unless we already have a mday.. |
364 | * | |
365 | * IOW, 01 Apr 05 parses as "April 1st, 2005". | |
366 | */ | |
367 | if (num > 0 && num < 32 && tm->tm_mday < 0) { | |
368 | tm->tm_mday = num; | |
369 | return n; | |
370 | } | |
371 | ||
372 | /* Two-digit year? */ | |
373 | if (n == 2 && tm->tm_year < 0) { | |
374 | if (num < 10 && tm->tm_mday >= 0) { | |
375 | tm->tm_year = num + 100; | |
376 | return n; | |
377 | } | |
378 | if (num >= 70) { | |
379 | tm->tm_year = num; | |
380 | return n; | |
381 | } | |
382 | } | |
383 | ||
384 | if (num > 0 && num < 32) { | |
385 | tm->tm_mday = num; | |
386 | } else if (num > 1900) { | |
387 | tm->tm_year = num - 1900; | |
388 | } else if (num > 70) { | |
389 | tm->tm_year = num; | |
390 | } else if (num > 0 && num < 13) { | |
391 | tm->tm_mon = num-1; | |
392 | } | |
ecee9d9e | 393 | |
198b0fb6 | 394 | return n; |
89967023 | 395 | } |
ecee9d9e | 396 | |
26a2d8ae | 397 | static int match_tz(const char *date, int *offp) |
89967023 LT |
398 | { |
399 | char *end; | |
400 | int offset = strtoul(date+1, &end, 10); | |
401 | int min, hour; | |
198b0fb6 | 402 | int n = end - date - 1; |
ecee9d9e | 403 | |
89967023 LT |
404 | min = offset % 100; |
405 | hour = offset / 100; | |
ecee9d9e | 406 | |
198b0fb6 LT |
407 | /* |
408 | * Don't accept any random crap.. At least 3 digits, and | |
409 | * a valid minute. We might want to check that the minutes | |
410 | * are divisible by 30 or something too. | |
411 | */ | |
68849b54 LT |
412 | if (min < 60 && n > 2) { |
413 | offset = hour*60+min; | |
414 | if (*date == '-') | |
415 | offset = -offset; | |
ecee9d9e | 416 | |
68849b54 LT |
417 | *offp = offset; |
418 | } | |
89967023 LT |
419 | return end - date; |
420 | } | |
ecee9d9e | 421 | |
01c6ad29 LT |
422 | static int date_string(unsigned long date, int offset, char *buf, int len) |
423 | { | |
424 | int sign = '+'; | |
425 | ||
426 | if (offset < 0) { | |
427 | offset = -offset; | |
428 | sign = '-'; | |
429 | } | |
430 | return snprintf(buf, len, "%lu %c%02d%02d", date, sign, offset / 60, offset % 60); | |
431 | } | |
432 | ||
89967023 LT |
433 | /* Gr. strptime is crap for this; it doesn't have a way to require RFC2822 |
434 | (i.e. English) day/month names, and it doesn't work correctly with %z. */ | |
2a39064c | 435 | int parse_date(const char *date, char *result, int maxlen) |
89967023 LT |
436 | { |
437 | struct tm tm; | |
01c6ad29 | 438 | int offset, tm_gmt; |
89967023 | 439 | time_t then; |
ecee9d9e | 440 | |
89967023 LT |
441 | memset(&tm, 0, sizeof(tm)); |
442 | tm.tm_year = -1; | |
443 | tm.tm_mon = -1; | |
444 | tm.tm_mday = -1; | |
eaa85129 LT |
445 | tm.tm_isdst = -1; |
446 | offset = -1; | |
9cb480f2 | 447 | tm_gmt = 0; |
89967023 LT |
448 | |
449 | for (;;) { | |
450 | int match = 0; | |
451 | unsigned char c = *date; | |
452 | ||
453 | /* Stop at end of string or newline */ | |
454 | if (!c || c == '\n') | |
455 | break; | |
456 | ||
457 | if (isalpha(c)) | |
458 | match = match_alpha(date, &tm, &offset); | |
459 | else if (isdigit(c)) | |
9cb480f2 | 460 | match = match_digit(date, &tm, &offset, &tm_gmt); |
89967023 LT |
461 | else if ((c == '-' || c == '+') && isdigit(date[1])) |
462 | match = match_tz(date, &offset); | |
463 | ||
464 | if (!match) { | |
465 | /* BAD CRAP */ | |
466 | match = 1; | |
467 | } | |
468 | ||
469 | date += match; | |
470 | } | |
ecee9d9e | 471 | |
eaa85129 LT |
472 | /* mktime uses local timezone */ |
473 | then = my_mktime(&tm); | |
474 | if (offset == -1) | |
475 | offset = (then - mktime(&tm)) / 60; | |
476 | ||
ecee9d9e | 477 | if (then == -1) |
2a39064c | 478 | return -1; |
ecee9d9e | 479 | |
9cb480f2 JH |
480 | if (!tm_gmt) |
481 | then -= offset * 60; | |
01c6ad29 | 482 | return date_string(then, offset, result, maxlen); |
ecee9d9e ET |
483 | } |
484 | ||
485 | void datestamp(char *buf, int bufsize) | |
486 | { | |
487 | time_t now; | |
488 | int offset; | |
489 | ||
490 | time(&now); | |
491 | ||
492 | offset = my_mktime(localtime(&now)) - now; | |
493 | offset /= 60; | |
494 | ||
01c6ad29 | 495 | date_string(now, offset, buf, bufsize); |
ecee9d9e | 496 | } |
3c07b1d1 LT |
497 | |
498 | static void update_tm(struct tm *tm, unsigned long sec) | |
499 | { | |
500 | time_t n = mktime(tm) - sec; | |
501 | localtime_r(&n, tm); | |
502 | } | |
503 | ||
a8aca418 LT |
504 | static void date_yesterday(struct tm *tm, int *num) |
505 | { | |
506 | update_tm(tm, 24*60*60); | |
507 | } | |
508 | ||
509 | static void date_time(struct tm *tm, int hour) | |
510 | { | |
511 | if (tm->tm_hour < hour) | |
512 | date_yesterday(tm, NULL); | |
513 | tm->tm_hour = hour; | |
514 | tm->tm_min = 0; | |
515 | tm->tm_sec = 0; | |
516 | } | |
517 | ||
518 | static void date_midnight(struct tm *tm, int *num) | |
519 | { | |
520 | date_time(tm, 0); | |
521 | } | |
522 | ||
523 | static void date_noon(struct tm *tm, int *num) | |
524 | { | |
525 | date_time(tm, 12); | |
526 | } | |
527 | ||
528 | static void date_tea(struct tm *tm, int *num) | |
529 | { | |
530 | date_time(tm, 17); | |
531 | } | |
532 | ||
533 | static const struct special { | |
534 | const char *name; | |
535 | void (*fn)(struct tm *, int *); | |
536 | } special[] = { | |
537 | { "yesterday", date_yesterday }, | |
538 | { "noon", date_noon }, | |
539 | { "midnight", date_midnight }, | |
540 | { "tea", date_tea }, | |
541 | { NULL } | |
542 | }; | |
543 | ||
3c07b1d1 LT |
544 | static const char *number_name[] = { |
545 | "zero", "one", "two", "three", "four", | |
546 | "five", "six", "seven", "eight", "nine", "ten", | |
547 | }; | |
548 | ||
a8aca418 | 549 | static const struct typelen { |
3c07b1d1 LT |
550 | const char *type; |
551 | int length; | |
552 | } typelen[] = { | |
553 | { "seconds", 1 }, | |
554 | { "minutes", 60 }, | |
555 | { "hours", 60*60 }, | |
556 | { "days", 24*60*60 }, | |
557 | { "weeks", 7*24*60*60 }, | |
558 | { NULL } | |
559 | }; | |
560 | ||
561 | static const char *approxidate_alpha(const char *date, struct tm *tm, int *num) | |
562 | { | |
a8aca418 LT |
563 | const struct typelen *tl; |
564 | const struct special *s; | |
3c07b1d1 LT |
565 | const char *end = date; |
566 | int n = 1, i; | |
567 | ||
568 | while (isalpha(*++end)) | |
569 | n++; | |
570 | ||
571 | for (i = 0; i < 12; i++) { | |
572 | int match = match_string(date, month_names[i]); | |
573 | if (match >= 3) { | |
574 | tm->tm_mon = i; | |
575 | return end; | |
576 | } | |
577 | } | |
578 | ||
a8aca418 LT |
579 | for (s = special; s->name; s++) { |
580 | int len = strlen(s->name); | |
581 | if (match_string(date, s->name) == len) { | |
582 | s->fn(tm, num); | |
583 | return end; | |
584 | } | |
3c07b1d1 LT |
585 | } |
586 | ||
587 | if (!*num) { | |
588 | for (i = 1; i < 11; i++) { | |
589 | int len = strlen(number_name[i]); | |
590 | if (match_string(date, number_name[i]) == len) { | |
591 | *num = i; | |
592 | return end; | |
593 | } | |
594 | } | |
595 | if (match_string(date, "last") == 4) | |
596 | *num = 1; | |
597 | return end; | |
598 | } | |
599 | ||
600 | tl = typelen; | |
601 | while (tl->type) { | |
602 | int len = strlen(tl->type); | |
603 | if (match_string(date, tl->type) >= len-1) { | |
604 | update_tm(tm, tl->length * *num); | |
605 | *num = 0; | |
606 | return end; | |
607 | } | |
608 | tl++; | |
609 | } | |
610 | ||
6b7b0427 LT |
611 | for (i = 0; i < 7; i++) { |
612 | int match = match_string(date, weekday_names[i]); | |
613 | if (match >= 3) { | |
614 | int diff, n = *num -1; | |
615 | *num = 0; | |
616 | ||
617 | diff = tm->tm_wday - i; | |
618 | if (diff <= 0) | |
619 | n++; | |
620 | diff += 7*n; | |
621 | ||
622 | update_tm(tm, diff * 24 * 60 * 60); | |
623 | return end; | |
624 | } | |
625 | } | |
626 | ||
3c07b1d1 LT |
627 | if (match_string(date, "months") >= 5) { |
628 | int n = tm->tm_mon - *num; | |
629 | *num = 0; | |
630 | while (n < 0) { | |
631 | n += 12; | |
632 | tm->tm_year--; | |
633 | } | |
634 | tm->tm_mon = n; | |
635 | return end; | |
636 | } | |
637 | ||
638 | if (match_string(date, "years") >= 4) { | |
639 | tm->tm_year -= *num; | |
640 | *num = 0; | |
641 | return end; | |
642 | } | |
643 | ||
644 | return end; | |
645 | } | |
646 | ||
647 | unsigned long approxidate(const char *date) | |
648 | { | |
649 | int number = 0; | |
650 | struct tm tm, now; | |
651 | struct timeval tv; | |
652 | char buffer[50]; | |
653 | ||
654 | if (parse_date(date, buffer, sizeof(buffer)) > 0) | |
655 | return strtoul(buffer, NULL, 10); | |
656 | ||
657 | gettimeofday(&tv, NULL); | |
658 | localtime_r(&tv.tv_sec, &tm); | |
659 | now = tm; | |
660 | for (;;) { | |
661 | unsigned char c = *date; | |
662 | if (!c) | |
663 | break; | |
664 | date++; | |
665 | if (isdigit(c)) { | |
666 | char *end; | |
667 | number = strtoul(date-1, &end, 10); | |
668 | date = end; | |
669 | continue; | |
670 | } | |
671 | if (isalpha(c)) | |
672 | date = approxidate_alpha(date-1, &tm, &number); | |
673 | } | |
674 | if (number > 0 && number < 32) | |
675 | tm.tm_mday = number; | |
b73cebf4 | 676 | if (tm.tm_mon > now.tm_mon && tm.tm_year == now.tm_year) |
3c07b1d1 LT |
677 | tm.tm_year--; |
678 | return mktime(&tm); | |
679 | } |