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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 | ||
dddbad72 | 42 | static time_t gm_time_t(timestamp_t time, int tz) |
9a8e35e9 LT |
43 | { |
44 | int minutes; | |
45 | ||
46 | minutes = tz < 0 ? -tz : tz; | |
47 | minutes = (minutes / 100)*60 + (minutes % 100); | |
48 | minutes = tz < 0 ? -minutes : minutes; | |
1e65a982 JS |
49 | |
50 | if (minutes > 0) { | |
51 | if (unsigned_add_overflows(time, minutes * 60)) | |
52 | die("Timestamp+tz too large: %"PRItime" +%04d", | |
53 | time, tz); | |
54 | } else if (time < -minutes * 60) | |
55 | die("Timestamp before Unix epoch: %"PRItime" %04d", time, tz); | |
56 | time += minutes * 60; | |
57 | if (date_overflows(time)) | |
58 | die("Timestamp too large for this system: %"PRItime, time); | |
59 | return (time_t)time; | |
9a8e35e9 LT |
60 | } |
61 | ||
f80cd783 LT |
62 | /* |
63 | * The "tz" thing is passed in as this strange "decimal parse of tz" | |
64 | * thing, which means that tz -0100 is passed in as the integer -100, | |
65 | * even though it means "sixty minutes off" | |
66 | */ | |
dddbad72 | 67 | static struct tm *time_to_tm(timestamp_t time, int tz) |
f80cd783 | 68 | { |
9a8e35e9 | 69 | time_t t = gm_time_t(time, tz); |
2a387043 JH |
70 | return gmtime(&t); |
71 | } | |
72 | ||
9eafe86d | 73 | static struct tm *time_to_tm_local(timestamp_t time) |
6eced3ec JK |
74 | { |
75 | time_t t = time; | |
76 | return localtime(&t); | |
77 | } | |
78 | ||
a7b02ccf JH |
79 | /* |
80 | * What value of "tz" was in effect back then at "time" in the | |
81 | * local timezone? | |
82 | */ | |
dddbad72 | 83 | static int local_tzoffset(timestamp_t time) |
a7b02ccf JH |
84 | { |
85 | time_t t, t_local; | |
86 | struct tm tm; | |
87 | int offset, eastwest; | |
88 | ||
1e65a982 JS |
89 | if (date_overflows(time)) |
90 | die("Timestamp too large for this system: %"PRItime, time); | |
91 | ||
92 | t = (time_t)time; | |
a7b02ccf | 93 | localtime_r(&t, &tm); |
bb5799d6 | 94 | t_local = tm_to_time_t(&tm); |
a7b02ccf | 95 | |
bab74837 JK |
96 | if (t_local == -1) |
97 | return 0; /* error; just use +0000 */ | |
a7b02ccf JH |
98 | if (t_local < t) { |
99 | eastwest = -1; | |
100 | offset = t - t_local; | |
101 | } else { | |
102 | eastwest = 1; | |
103 | offset = t_local - t; | |
104 | } | |
105 | offset /= 60; /* in minutes */ | |
106 | offset = (offset % 60) + ((offset / 60) * 100); | |
107 | return offset * eastwest; | |
108 | } | |
109 | ||
dddbad72 | 110 | void show_date_relative(timestamp_t time, int tz, |
33012fc4 | 111 | const struct timeval *now, |
7d29afd4 | 112 | struct strbuf *timebuf) |
33012fc4 | 113 | { |
dddbad72 | 114 | timestamp_t diff; |
7d29afd4 JN |
115 | if (now->tv_sec < time) { |
116 | strbuf_addstr(timebuf, _("in the future")); | |
117 | return; | |
118 | } | |
33012fc4 AR |
119 | diff = now->tv_sec - time; |
120 | if (diff < 90) { | |
7d29afd4 | 121 | strbuf_addf(timebuf, |
cb71f8bd | 122 | Q_("%"PRItime" second ago", "%"PRItime" seconds ago", diff), diff); |
7d29afd4 | 123 | return; |
33012fc4 AR |
124 | } |
125 | /* Turn it into minutes */ | |
126 | diff = (diff + 30) / 60; | |
127 | if (diff < 90) { | |
7d29afd4 | 128 | strbuf_addf(timebuf, |
cb71f8bd | 129 | Q_("%"PRItime" minute ago", "%"PRItime" minutes ago", diff), diff); |
7d29afd4 | 130 | return; |
33012fc4 AR |
131 | } |
132 | /* Turn it into hours */ | |
133 | diff = (diff + 30) / 60; | |
134 | if (diff < 36) { | |
7d29afd4 | 135 | strbuf_addf(timebuf, |
cb71f8bd | 136 | Q_("%"PRItime" hour ago", "%"PRItime" hours ago", diff), diff); |
7d29afd4 | 137 | return; |
33012fc4 AR |
138 | } |
139 | /* We deal with number of days from here on */ | |
140 | diff = (diff + 12) / 24; | |
141 | if (diff < 14) { | |
7d29afd4 | 142 | strbuf_addf(timebuf, |
cb71f8bd | 143 | Q_("%"PRItime" day ago", "%"PRItime" days ago", diff), diff); |
7d29afd4 | 144 | return; |
33012fc4 AR |
145 | } |
146 | /* Say weeks for the past 10 weeks or so */ | |
147 | if (diff < 70) { | |
7d29afd4 | 148 | strbuf_addf(timebuf, |
cb71f8bd | 149 | Q_("%"PRItime" week ago", "%"PRItime" weeks ago", (diff + 3) / 7), |
7d29afd4 JN |
150 | (diff + 3) / 7); |
151 | return; | |
33012fc4 AR |
152 | } |
153 | /* Say months for the past 12 months or so */ | |
dbc1b1f7 | 154 | if (diff < 365) { |
7d29afd4 | 155 | strbuf_addf(timebuf, |
cb71f8bd | 156 | Q_("%"PRItime" month ago", "%"PRItime" months ago", (diff + 15) / 30), |
7d29afd4 JN |
157 | (diff + 15) / 30); |
158 | return; | |
33012fc4 AR |
159 | } |
160 | /* Give years and months for 5 years or so */ | |
161 | if (diff < 1825) { | |
dddbad72 JS |
162 | timestamp_t totalmonths = (diff * 12 * 2 + 365) / (365 * 2); |
163 | timestamp_t years = totalmonths / 12; | |
164 | timestamp_t months = totalmonths % 12; | |
7d29afd4 JN |
165 | if (months) { |
166 | struct strbuf sb = STRBUF_INIT; | |
cb71f8bd | 167 | strbuf_addf(&sb, Q_("%"PRItime" year", "%"PRItime" years", years), years); |
7d29afd4 | 168 | strbuf_addf(timebuf, |
fcaed04d | 169 | /* TRANSLATORS: "%s" is "<n> years" */ |
cb71f8bd | 170 | Q_("%s, %"PRItime" month ago", "%s, %"PRItime" months ago", months), |
7d29afd4 JN |
171 | sb.buf, months); |
172 | strbuf_release(&sb); | |
173 | } else | |
174 | strbuf_addf(timebuf, | |
cb71f8bd | 175 | Q_("%"PRItime" year ago", "%"PRItime" years ago", years), years); |
7d29afd4 | 176 | return; |
33012fc4 AR |
177 | } |
178 | /* Otherwise, just years. Centuries is probably overkill. */ | |
7d29afd4 | 179 | strbuf_addf(timebuf, |
cb71f8bd | 180 | Q_("%"PRItime" year ago", "%"PRItime" years ago", (diff + 183) / 365), |
7d29afd4 | 181 | (diff + 183) / 365); |
33012fc4 AR |
182 | } |
183 | ||
a5481a6c JK |
184 | struct date_mode *date_mode_from_type(enum date_mode_type type) |
185 | { | |
186 | static struct date_mode mode; | |
aa1462cc | 187 | if (type == DATE_STRFTIME) |
033abf97 | 188 | BUG("cannot create anonymous strftime date_mode struct"); |
a5481a6c | 189 | mode.type = type; |
add00ba2 | 190 | mode.local = 0; |
a5481a6c JK |
191 | return &mode; |
192 | } | |
193 | ||
dddbad72 | 194 | const char *show_date(timestamp_t time, int tz, const struct date_mode *mode) |
2a387043 JH |
195 | { |
196 | struct tm *tm; | |
7d29afd4 | 197 | static struct strbuf timebuf = STRBUF_INIT; |
2a387043 | 198 | |
642833db JK |
199 | if (mode->type == DATE_UNIX) { |
200 | strbuf_reset(&timebuf); | |
cb71f8bd | 201 | strbuf_addf(&timebuf, "%"PRItime, time); |
642833db JK |
202 | return timebuf.buf; |
203 | } | |
204 | ||
add00ba2 | 205 | if (mode->local) |
dc6d782c JK |
206 | tz = local_tzoffset(time); |
207 | ||
a5481a6c | 208 | if (mode->type == DATE_RAW) { |
7d29afd4 | 209 | strbuf_reset(&timebuf); |
cb71f8bd | 210 | strbuf_addf(&timebuf, "%"PRItime" %+05d", time, tz); |
7d29afd4 | 211 | return timebuf.buf; |
7dff9b30 LT |
212 | } |
213 | ||
a5481a6c | 214 | if (mode->type == DATE_RELATIVE) { |
9a8e35e9 | 215 | struct timeval now; |
7d29afd4 JN |
216 | |
217 | strbuf_reset(&timebuf); | |
9a8e35e9 | 218 | gettimeofday(&now, NULL); |
7d29afd4 JN |
219 | show_date_relative(time, tz, &now, &timebuf); |
220 | return timebuf.buf; | |
9a8e35e9 LT |
221 | } |
222 | ||
6eced3ec JK |
223 | if (mode->local) |
224 | tm = time_to_tm_local(time); | |
225 | else | |
226 | tm = time_to_tm(time, tz); | |
2b15846d JK |
227 | if (!tm) { |
228 | tm = time_to_tm(0, 0); | |
229 | tz = 0; | |
230 | } | |
7d29afd4 JN |
231 | |
232 | strbuf_reset(&timebuf); | |
a5481a6c | 233 | if (mode->type == DATE_SHORT) |
7d29afd4 | 234 | strbuf_addf(&timebuf, "%04d-%02d-%02d", tm->tm_year + 1900, |
f8493ec0 | 235 | tm->tm_mon + 1, tm->tm_mday); |
a5481a6c | 236 | else if (mode->type == DATE_ISO8601) |
7d29afd4 | 237 | strbuf_addf(&timebuf, "%04d-%02d-%02d %02d:%02d:%02d %+05d", |
ee8f838e RR |
238 | tm->tm_year + 1900, |
239 | tm->tm_mon + 1, | |
240 | tm->tm_mday, | |
241 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
242 | tz); | |
a5481a6c | 243 | else if (mode->type == DATE_ISO8601_STRICT) { |
466fb674 BB |
244 | char sign = (tz >= 0) ? '+' : '-'; |
245 | tz = abs(tz); | |
246 | strbuf_addf(&timebuf, "%04d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d", | |
247 | tm->tm_year + 1900, | |
248 | tm->tm_mon + 1, | |
249 | tm->tm_mday, | |
250 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
251 | sign, tz / 100, tz % 100); | |
a5481a6c | 252 | } else if (mode->type == DATE_RFC2822) |
7d29afd4 | 253 | strbuf_addf(&timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d", |
73013afd JH |
254 | weekday_names[tm->tm_wday], tm->tm_mday, |
255 | month_names[tm->tm_mon], tm->tm_year + 1900, | |
256 | tm->tm_hour, tm->tm_min, tm->tm_sec, tz); | |
aa1462cc | 257 | else if (mode->type == DATE_STRFTIME) |
6eced3ec | 258 | strbuf_addftime(&timebuf, mode->strftime_fmt, tm, tz, |
3b702239 | 259 | !mode->local); |
f8493ec0 | 260 | else |
7d29afd4 | 261 | strbuf_addf(&timebuf, "%.3s %.3s %d %02d:%02d:%02d %d%c%+05d", |
f8493ec0 JS |
262 | weekday_names[tm->tm_wday], |
263 | month_names[tm->tm_mon], | |
264 | tm->tm_mday, | |
265 | tm->tm_hour, tm->tm_min, tm->tm_sec, | |
a7b02ccf | 266 | tm->tm_year + 1900, |
add00ba2 | 267 | mode->local ? 0 : ' ', |
a7b02ccf | 268 | tz); |
7d29afd4 | 269 | return timebuf.buf; |
f80cd783 LT |
270 | } |
271 | ||
89967023 LT |
272 | /* |
273 | * Check these. And note how it doesn't do the summer-time conversion. | |
274 | * | |
275 | * In my world, it's always summer, and things are probably a bit off | |
276 | * in other ways too. | |
277 | */ | |
278 | static const struct { | |
279 | const char *name; | |
280 | int offset; | |
5e2a78a4 | 281 | int dst; |
89967023 | 282 | } timezone_names[] = { |
5e2a78a4 LT |
283 | { "IDLW", -12, 0, }, /* International Date Line West */ |
284 | { "NT", -11, 0, }, /* Nome */ | |
285 | { "CAT", -10, 0, }, /* Central Alaska */ | |
286 | { "HST", -10, 0, }, /* Hawaii Standard */ | |
287 | { "HDT", -10, 1, }, /* Hawaii Daylight */ | |
288 | { "YST", -9, 0, }, /* Yukon Standard */ | |
289 | { "YDT", -9, 1, }, /* Yukon Daylight */ | |
290 | { "PST", -8, 0, }, /* Pacific Standard */ | |
291 | { "PDT", -8, 1, }, /* Pacific Daylight */ | |
292 | { "MST", -7, 0, }, /* Mountain Standard */ | |
293 | { "MDT", -7, 1, }, /* Mountain Daylight */ | |
294 | { "CST", -6, 0, }, /* Central Standard */ | |
295 | { "CDT", -6, 1, }, /* Central Daylight */ | |
296 | { "EST", -5, 0, }, /* Eastern Standard */ | |
297 | { "EDT", -5, 1, }, /* Eastern Daylight */ | |
298 | { "AST", -3, 0, }, /* Atlantic Standard */ | |
299 | { "ADT", -3, 1, }, /* Atlantic Daylight */ | |
300 | { "WAT", -1, 0, }, /* West Africa */ | |
301 | ||
302 | { "GMT", 0, 0, }, /* Greenwich Mean */ | |
303 | { "UTC", 0, 0, }, /* Universal (Coordinated) */ | |
75b37e70 | 304 | { "Z", 0, 0, }, /* Zulu, alias for UTC */ |
5e2a78a4 LT |
305 | |
306 | { "WET", 0, 0, }, /* Western European */ | |
307 | { "BST", 0, 1, }, /* British Summer */ | |
308 | { "CET", +1, 0, }, /* Central European */ | |
309 | { "MET", +1, 0, }, /* Middle European */ | |
310 | { "MEWT", +1, 0, }, /* Middle European Winter */ | |
311 | { "MEST", +1, 1, }, /* Middle European Summer */ | |
312 | { "CEST", +1, 1, }, /* Central European Summer */ | |
313 | { "MESZ", +1, 1, }, /* Middle European Summer */ | |
314 | { "FWT", +1, 0, }, /* French Winter */ | |
315 | { "FST", +1, 1, }, /* French Summer */ | |
316 | { "EET", +2, 0, }, /* Eastern Europe, USSR Zone 1 */ | |
92e2311b | 317 | { "EEST", +2, 1, }, /* Eastern European Daylight */ |
5e2a78a4 LT |
318 | { "WAST", +7, 0, }, /* West Australian Standard */ |
319 | { "WADT", +7, 1, }, /* West Australian Daylight */ | |
320 | { "CCT", +8, 0, }, /* China Coast, USSR Zone 7 */ | |
321 | { "JST", +9, 0, }, /* Japan Standard, USSR Zone 8 */ | |
322 | { "EAST", +10, 0, }, /* Eastern Australian Standard */ | |
323 | { "EADT", +10, 1, }, /* Eastern Australian Daylight */ | |
324 | { "GST", +10, 0, }, /* Guam Standard, USSR Zone 9 */ | |
695ed472 SD |
325 | { "NZT", +12, 0, }, /* New Zealand */ |
326 | { "NZST", +12, 0, }, /* New Zealand Standard */ | |
327 | { "NZDT", +12, 1, }, /* New Zealand Daylight */ | |
5e2a78a4 | 328 | { "IDLE", +12, 0, }, /* International Date Line East */ |
89967023 | 329 | }; |
ecee9d9e | 330 | |
89967023 | 331 | static int match_string(const char *date, const char *str) |
ecee9d9e | 332 | { |
89967023 LT |
333 | int i = 0; |
334 | ||
335 | for (i = 0; *date; date++, str++, i++) { | |
336 | if (*date == *str) | |
337 | continue; | |
338 | if (toupper(*date) == toupper(*str)) | |
339 | continue; | |
340 | if (!isalnum(*date)) | |
341 | break; | |
342 | return 0; | |
343 | } | |
344 | return i; | |
ecee9d9e ET |
345 | } |
346 | ||
68849b54 LT |
347 | static int skip_alpha(const char *date) |
348 | { | |
349 | int i = 0; | |
350 | do { | |
351 | i++; | |
352 | } while (isalpha(date[i])); | |
353 | return i; | |
354 | } | |
355 | ||
89967023 LT |
356 | /* |
357 | * Parse month, weekday, or timezone name | |
358 | */ | |
359 | static int match_alpha(const char *date, struct tm *tm, int *offset) | |
ecee9d9e | 360 | { |
89967023 | 361 | int i; |
ecee9d9e | 362 | |
89967023 LT |
363 | for (i = 0; i < 12; i++) { |
364 | int match = match_string(date, month_names[i]); | |
365 | if (match >= 3) { | |
366 | tm->tm_mon = i; | |
367 | return match; | |
ecee9d9e | 368 | } |
89967023 | 369 | } |
ecee9d9e | 370 | |
89967023 LT |
371 | for (i = 0; i < 7; i++) { |
372 | int match = match_string(date, weekday_names[i]); | |
373 | if (match >= 3) { | |
374 | tm->tm_wday = i; | |
375 | return match; | |
376 | } | |
377 | } | |
ecee9d9e | 378 | |
b4f2a6ac | 379 | for (i = 0; i < ARRAY_SIZE(timezone_names); i++) { |
89967023 | 380 | int match = match_string(date, timezone_names[i].name); |
75b37e70 | 381 | if (match >= 3 || match == strlen(timezone_names[i].name)) { |
5e2a78a4 LT |
382 | int off = timezone_names[i].offset; |
383 | ||
384 | /* This is bogus, but we like summer */ | |
385 | off += timezone_names[i].dst; | |
386 | ||
92e2311b LT |
387 | /* Only use the tz name offset if we don't have anything better */ |
388 | if (*offset == -1) | |
389 | *offset = 60*off; | |
390 | ||
89967023 | 391 | return match; |
ecee9d9e ET |
392 | } |
393 | } | |
ecee9d9e | 394 | |
68849b54 | 395 | if (match_string(date, "PM") == 2) { |
18b633ca LT |
396 | tm->tm_hour = (tm->tm_hour % 12) + 12; |
397 | return 2; | |
398 | } | |
399 | ||
400 | if (match_string(date, "AM") == 2) { | |
401 | tm->tm_hour = (tm->tm_hour % 12) + 0; | |
68849b54 LT |
402 | return 2; |
403 | } | |
404 | ||
89967023 | 405 | /* BAD CRAP */ |
68849b54 | 406 | return skip_alpha(date); |
89967023 | 407 | } |
ecee9d9e | 408 | |
38035cf4 | 409 | static int is_date(int year, int month, int day, struct tm *now_tm, time_t now, struct tm *tm) |
89967023 | 410 | { |
198b0fb6 | 411 | if (month > 0 && month < 13 && day > 0 && day < 32) { |
38035cf4 JH |
412 | struct tm check = *tm; |
413 | struct tm *r = (now_tm ? &check : tm); | |
414 | time_t specified; | |
415 | ||
416 | r->tm_mon = month - 1; | |
417 | r->tm_mday = day; | |
198b0fb6 | 418 | if (year == -1) { |
38035cf4 JH |
419 | if (!now_tm) |
420 | return 1; | |
421 | r->tm_year = now_tm->tm_year; | |
89967023 | 422 | } |
38035cf4 JH |
423 | else if (year >= 1970 && year < 2100) |
424 | r->tm_year = year - 1900; | |
425 | else if (year > 70 && year < 100) | |
426 | r->tm_year = year; | |
427 | else if (year < 38) | |
428 | r->tm_year = year + 100; | |
429 | else | |
198b0fb6 | 430 | return 0; |
38035cf4 JH |
431 | if (!now_tm) |
432 | return 1; | |
433 | ||
bb5799d6 | 434 | specified = tm_to_time_t(r); |
198b0fb6 | 435 | |
38035cf4 JH |
436 | /* Be it commit time or author time, it does not make |
437 | * sense to specify timestamp way into the future. Make | |
438 | * sure it is not later than ten days from now... | |
439 | */ | |
e6e87516 | 440 | if ((specified != -1) && (now + 10*24*3600 < specified)) |
38035cf4 JH |
441 | return 0; |
442 | tm->tm_mon = r->tm_mon; | |
443 | tm->tm_mday = r->tm_mday; | |
444 | if (year != -1) | |
445 | tm->tm_year = r->tm_year; | |
198b0fb6 | 446 | return 1; |
89967023 | 447 | } |
198b0fb6 LT |
448 | return 0; |
449 | } | |
ecee9d9e | 450 | |
dddbad72 | 451 | static int match_multi_number(timestamp_t num, char c, const char *date, |
073281e2 | 452 | char *end, struct tm *tm, time_t now) |
198b0fb6 | 453 | { |
38035cf4 JH |
454 | struct tm now_tm; |
455 | struct tm *refuse_future; | |
198b0fb6 LT |
456 | long num2, num3; |
457 | ||
458 | num2 = strtol(end+1, &end, 10); | |
459 | num3 = -1; | |
460 | if (*end == c && isdigit(end[1])) | |
461 | num3 = strtol(end+1, &end, 10); | |
462 | ||
463 | /* Time? Date? */ | |
89967023 | 464 | switch (c) { |
198b0fb6 LT |
465 | case ':': |
466 | if (num3 < 0) | |
467 | num3 = 0; | |
468 | if (num < 25 && num2 >= 0 && num2 < 60 && num3 >= 0 && num3 <= 60) { | |
469 | tm->tm_hour = num; | |
470 | tm->tm_min = num2; | |
471 | tm->tm_sec = num3; | |
89967023 LT |
472 | break; |
473 | } | |
198b0fb6 | 474 | return 0; |
89967023 LT |
475 | |
476 | case '-': | |
477 | case '/': | |
38035cf4 | 478 | case '.': |
073281e2 JK |
479 | if (!now) |
480 | now = time(NULL); | |
38035cf4 JH |
481 | refuse_future = NULL; |
482 | if (gmtime_r(&now, &now_tm)) | |
483 | refuse_future = &now_tm; | |
484 | ||
198b0fb6 LT |
485 | if (num > 70) { |
486 | /* yyyy-mm-dd? */ | |
d3723953 | 487 | if (is_date(num, num2, num3, NULL, now, tm)) |
198b0fb6 LT |
488 | break; |
489 | /* yyyy-dd-mm? */ | |
d3723953 | 490 | if (is_date(num, num3, num2, NULL, now, tm)) |
89967023 | 491 | break; |
198b0fb6 | 492 | } |
38035cf4 JH |
493 | /* Our eastern European friends say dd.mm.yy[yy] |
494 | * is the norm there, so giving precedence to | |
495 | * mm/dd/yy[yy] form only when separator is not '.' | |
496 | */ | |
497 | if (c != '.' && | |
498 | is_date(num3, num, num2, refuse_future, now, tm)) | |
499 | break; | |
500 | /* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */ | |
501 | if (is_date(num3, num2, num, refuse_future, now, tm)) | |
89967023 | 502 | break; |
38035cf4 JH |
503 | /* Funny European mm.dd.yy */ |
504 | if (c == '.' && | |
505 | is_date(num3, num, num2, refuse_future, now, tm)) | |
198b0fb6 LT |
506 | break; |
507 | return 0; | |
508 | } | |
509 | return end - date; | |
510 | } | |
511 | ||
36e4986f LT |
512 | /* |
513 | * Have we filled in any part of the time/date yet? | |
514 | * We just do a binary 'and' to see if the sign bit | |
515 | * is set in all the values. | |
516 | */ | |
9f2b6d29 LT |
517 | static inline int nodate(struct tm *tm) |
518 | { | |
36e4986f LT |
519 | return (tm->tm_year & |
520 | tm->tm_mon & | |
521 | tm->tm_mday & | |
522 | tm->tm_hour & | |
523 | tm->tm_min & | |
524 | tm->tm_sec) < 0; | |
9f2b6d29 LT |
525 | } |
526 | ||
198b0fb6 | 527 | /* |
a6080a0a | 528 | * We've seen a digit. Time? Year? Date? |
198b0fb6 | 529 | */ |
26a2d8ae | 530 | static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt) |
198b0fb6 LT |
531 | { |
532 | int n; | |
533 | char *end; | |
dddbad72 | 534 | timestamp_t num; |
198b0fb6 | 535 | |
1aeb7e75 | 536 | num = parse_timestamp(date, &end, 10); |
198b0fb6 LT |
537 | |
538 | /* | |
a1a5a634 JS |
539 | * Seconds since 1970? We trigger on that for any numbers with |
540 | * more than 8 digits. This is because we don't want to rule out | |
541 | * numbers like 20070606 as a YYYYMMDD date. | |
198b0fb6 | 542 | */ |
9f2b6d29 | 543 | if (num >= 100000000 && nodate(tm)) { |
198b0fb6 | 544 | time_t time = num; |
9cb480f2 JH |
545 | if (gmtime_r(&time, tm)) { |
546 | *tm_gmt = 1; | |
198b0fb6 | 547 | return end - date; |
9cb480f2 | 548 | } |
198b0fb6 LT |
549 | } |
550 | ||
551 | /* | |
38035cf4 | 552 | * Check for special formats: num[-.:/]num[same]num |
198b0fb6 LT |
553 | */ |
554 | switch (*end) { | |
555 | case ':': | |
38035cf4 | 556 | case '.': |
198b0fb6 LT |
557 | case '/': |
558 | case '-': | |
559 | if (isdigit(end[1])) { | |
073281e2 | 560 | int match = match_multi_number(num, *end, date, end, tm, 0); |
198b0fb6 LT |
561 | if (match) |
562 | return match; | |
89967023 LT |
563 | } |
564 | } | |
198b0fb6 LT |
565 | |
566 | /* | |
567 | * None of the special formats? Try to guess what | |
568 | * the number meant. We use the number of digits | |
569 | * to make a more educated guess.. | |
570 | */ | |
571 | n = 0; | |
572 | do { | |
573 | n++; | |
574 | } while (isdigit(date[n])); | |
575 | ||
576 | /* Four-digit year or a timezone? */ | |
577 | if (n == 4) { | |
7122f82f | 578 | if (num <= 1400 && *offset == -1) { |
198b0fb6 LT |
579 | unsigned int minutes = num % 100; |
580 | unsigned int hours = num / 100; | |
581 | *offset = hours*60 + minutes; | |
582 | } else if (num > 1900 && num < 2100) | |
583 | tm->tm_year = num - 1900; | |
584 | return n; | |
585 | } | |
586 | ||
9f2b6d29 LT |
587 | /* |
588 | * Ignore lots of numerals. We took care of 4-digit years above. | |
589 | * Days or months must be one or two digits. | |
590 | */ | |
591 | if (n > 2) | |
592 | return n; | |
593 | ||
198b0fb6 LT |
594 | /* |
595 | * NOTE! We will give precedence to day-of-month over month or | |
82f9d58a | 596 | * year numbers in the 1-12 range. So 05 is always "mday 5", |
198b0fb6 LT |
597 | * unless we already have a mday.. |
598 | * | |
599 | * IOW, 01 Apr 05 parses as "April 1st, 2005". | |
600 | */ | |
601 | if (num > 0 && num < 32 && tm->tm_mday < 0) { | |
602 | tm->tm_mday = num; | |
603 | return n; | |
604 | } | |
605 | ||
606 | /* Two-digit year? */ | |
607 | if (n == 2 && tm->tm_year < 0) { | |
608 | if (num < 10 && tm->tm_mday >= 0) { | |
609 | tm->tm_year = num + 100; | |
610 | return n; | |
611 | } | |
612 | if (num >= 70) { | |
613 | tm->tm_year = num; | |
614 | return n; | |
615 | } | |
616 | } | |
617 | ||
90290552 | 618 | if (num > 0 && num < 13 && tm->tm_mon < 0) |
198b0fb6 | 619 | tm->tm_mon = num-1; |
a6080a0a | 620 | |
198b0fb6 | 621 | return n; |
89967023 | 622 | } |
ecee9d9e | 623 | |
26a2d8ae | 624 | static int match_tz(const char *date, int *offp) |
89967023 LT |
625 | { |
626 | char *end; | |
ee646eb4 HL |
627 | int hour = strtoul(date + 1, &end, 10); |
628 | int n = end - (date + 1); | |
629 | int min = 0; | |
ecee9d9e | 630 | |
ee646eb4 HL |
631 | if (n == 4) { |
632 | /* hhmm */ | |
633 | min = hour % 100; | |
634 | hour = hour / 100; | |
635 | } else if (n != 2) { | |
636 | min = 99; /* random crap */ | |
637 | } else if (*end == ':') { | |
638 | /* hh:mm? */ | |
639 | min = strtoul(end + 1, &end, 10); | |
640 | if (end - (date + 1) != 5) | |
641 | min = 99; /* random crap */ | |
642 | } /* otherwise we parsed "hh" */ | |
ecee9d9e | 643 | |
198b0fb6 | 644 | /* |
ee646eb4 HL |
645 | * Don't accept any random crap. Even though some places have |
646 | * offset larger than 12 hours (e.g. Pacific/Kiritimati is at | |
647 | * UTC+14), there is something wrong if hour part is much | |
648 | * larger than that. We might also want to check that the | |
649 | * minutes are divisible by 15 or something too. (Offset of | |
650 | * Kathmandu, Nepal is UTC+5:45) | |
198b0fb6 | 651 | */ |
ee646eb4 HL |
652 | if (min < 60 && hour < 24) { |
653 | int offset = hour * 60 + min; | |
68849b54 LT |
654 | if (*date == '-') |
655 | offset = -offset; | |
68849b54 LT |
656 | *offp = offset; |
657 | } | |
89967023 LT |
658 | return end - date; |
659 | } | |
ecee9d9e | 660 | |
dddbad72 | 661 | static void date_string(timestamp_t date, int offset, struct strbuf *buf) |
01c6ad29 LT |
662 | { |
663 | int sign = '+'; | |
664 | ||
665 | if (offset < 0) { | |
666 | offset = -offset; | |
667 | sign = '-'; | |
668 | } | |
cb71f8bd | 669 | strbuf_addf(buf, "%"PRItime" %c%02d%02d", date, sign, offset / 60, offset % 60); |
01c6ad29 LT |
670 | } |
671 | ||
116eb3ab JH |
672 | /* |
673 | * Parse a string like "0 +0000" as ancient timestamp near epoch, but | |
674 | * only when it appears not as part of any other string. | |
675 | */ | |
dddbad72 | 676 | static int match_object_header_date(const char *date, timestamp_t *timestamp, int *offset) |
116eb3ab JH |
677 | { |
678 | char *end; | |
dddbad72 | 679 | timestamp_t stamp; |
116eb3ab JH |
680 | int ofs; |
681 | ||
be21d167 | 682 | if (*date < '0' || '9' < *date) |
116eb3ab | 683 | return -1; |
1aeb7e75 | 684 | stamp = parse_timestamp(date, &end, 10); |
dddbad72 | 685 | if (*end != ' ' || stamp == TIME_MAX || (end[1] != '+' && end[1] != '-')) |
116eb3ab JH |
686 | return -1; |
687 | date = end + 2; | |
688 | ofs = strtol(date, &end, 10); | |
689 | if ((*end != '\0' && (*end != '\n')) || end != date + 4) | |
690 | return -1; | |
691 | ofs = (ofs / 100) * 60 + (ofs % 100); | |
692 | if (date[-1] == '-') | |
693 | ofs = -ofs; | |
694 | *timestamp = stamp; | |
695 | *offset = ofs; | |
696 | return 0; | |
697 | } | |
698 | ||
89967023 LT |
699 | /* Gr. strptime is crap for this; it doesn't have a way to require RFC2822 |
700 | (i.e. English) day/month names, and it doesn't work correctly with %z. */ | |
dddbad72 | 701 | int parse_date_basic(const char *date, timestamp_t *timestamp, int *offset) |
89967023 LT |
702 | { |
703 | struct tm tm; | |
c5043cc1 | 704 | int tm_gmt; |
dddbad72 | 705 | timestamp_t dummy_timestamp; |
c5043cc1 RR |
706 | int dummy_offset; |
707 | ||
708 | if (!timestamp) | |
709 | timestamp = &dummy_timestamp; | |
710 | if (!offset) | |
711 | offset = &dummy_offset; | |
ecee9d9e | 712 | |
89967023 LT |
713 | memset(&tm, 0, sizeof(tm)); |
714 | tm.tm_year = -1; | |
715 | tm.tm_mon = -1; | |
716 | tm.tm_mday = -1; | |
eaa85129 | 717 | tm.tm_isdst = -1; |
36e4986f LT |
718 | tm.tm_hour = -1; |
719 | tm.tm_min = -1; | |
720 | tm.tm_sec = -1; | |
c5043cc1 | 721 | *offset = -1; |
9cb480f2 | 722 | tm_gmt = 0; |
89967023 | 723 | |
2c733fb2 JH |
724 | if (*date == '@' && |
725 | !match_object_header_date(date + 1, timestamp, offset)) | |
116eb3ab | 726 | return 0; /* success */ |
89967023 LT |
727 | for (;;) { |
728 | int match = 0; | |
729 | unsigned char c = *date; | |
730 | ||
731 | /* Stop at end of string or newline */ | |
732 | if (!c || c == '\n') | |
733 | break; | |
734 | ||
735 | if (isalpha(c)) | |
c5043cc1 | 736 | match = match_alpha(date, &tm, offset); |
89967023 | 737 | else if (isdigit(c)) |
c5043cc1 | 738 | match = match_digit(date, &tm, offset, &tm_gmt); |
89967023 | 739 | else if ((c == '-' || c == '+') && isdigit(date[1])) |
c5043cc1 | 740 | match = match_tz(date, offset); |
89967023 LT |
741 | |
742 | if (!match) { | |
743 | /* BAD CRAP */ | |
744 | match = 1; | |
a6080a0a | 745 | } |
89967023 LT |
746 | |
747 | date += match; | |
748 | } | |
ecee9d9e | 749 | |
f6e63621 | 750 | /* do not use mktime(), which uses local timezone, here */ |
c5043cc1 | 751 | *timestamp = tm_to_time_t(&tm); |
7fcec48d JH |
752 | if (*timestamp == -1) |
753 | return -1; | |
754 | ||
e1033da6 | 755 | if (*offset == -1) { |
f6e63621 JH |
756 | time_t temp_time; |
757 | ||
758 | /* gmtime_r() in match_digit() may have clobbered it */ | |
759 | tm.tm_isdst = -1; | |
760 | temp_time = mktime(&tm); | |
e1033da6 MG |
761 | if ((time_t)*timestamp > temp_time) { |
762 | *offset = ((time_t)*timestamp - temp_time) / 60; | |
763 | } else { | |
764 | *offset = -(int)((temp_time - (time_t)*timestamp) / 60); | |
765 | } | |
766 | } | |
eaa85129 | 767 | |
9cb480f2 | 768 | if (!tm_gmt) |
c5043cc1 | 769 | *timestamp -= *offset * 60; |
9644c061 | 770 | return 0; /* success */ |
c5043cc1 RR |
771 | } |
772 | ||
dddbad72 | 773 | int parse_expiry_date(const char *date, timestamp_t *timestamp) |
3d27b9b0 JH |
774 | { |
775 | int errors = 0; | |
776 | ||
777 | if (!strcmp(date, "never") || !strcmp(date, "false")) | |
778 | *timestamp = 0; | |
779 | else if (!strcmp(date, "all") || !strcmp(date, "now")) | |
780 | /* | |
781 | * We take over "now" here, which usually translates | |
782 | * to the current timestamp. This is because the user | |
783 | * really means to expire everything she has done in | |
784 | * the past, and by definition reflogs are the record | |
785 | * of the past, and there is nothing from the future | |
786 | * to be kept. | |
787 | */ | |
dddbad72 | 788 | *timestamp = TIME_MAX; |
3d27b9b0 JH |
789 | else |
790 | *timestamp = approxidate_careful(date, &errors); | |
791 | ||
792 | return errors; | |
793 | } | |
794 | ||
c33ddc2e | 795 | int parse_date(const char *date, struct strbuf *result) |
c5043cc1 | 796 | { |
dddbad72 | 797 | timestamp_t timestamp; |
c5043cc1 | 798 | int offset; |
9644c061 | 799 | if (parse_date_basic(date, ×tamp, &offset)) |
c5043cc1 | 800 | return -1; |
c33ddc2e JK |
801 | date_string(timestamp, offset, result); |
802 | return 0; | |
ecee9d9e ET |
803 | } |
804 | ||
add00ba2 JK |
805 | static enum date_mode_type parse_date_type(const char *format, const char **end) |
806 | { | |
807 | if (skip_prefix(format, "relative", end)) | |
808 | return DATE_RELATIVE; | |
809 | if (skip_prefix(format, "iso8601-strict", end) || | |
810 | skip_prefix(format, "iso-strict", end)) | |
811 | return DATE_ISO8601_STRICT; | |
812 | if (skip_prefix(format, "iso8601", end) || | |
813 | skip_prefix(format, "iso", end)) | |
814 | return DATE_ISO8601; | |
815 | if (skip_prefix(format, "rfc2822", end) || | |
816 | skip_prefix(format, "rfc", end)) | |
817 | return DATE_RFC2822; | |
818 | if (skip_prefix(format, "short", end)) | |
819 | return DATE_SHORT; | |
820 | if (skip_prefix(format, "default", end)) | |
821 | return DATE_NORMAL; | |
822 | if (skip_prefix(format, "raw", end)) | |
823 | return DATE_RAW; | |
642833db JK |
824 | if (skip_prefix(format, "unix", end)) |
825 | return DATE_UNIX; | |
add00ba2 JK |
826 | if (skip_prefix(format, "format", end)) |
827 | return DATE_STRFTIME; | |
828 | ||
829 | die("unknown date format %s", format); | |
830 | } | |
831 | ||
a5481a6c | 832 | void parse_date_format(const char *format, struct date_mode *mode) |
856665f8 | 833 | { |
add00ba2 JK |
834 | const char *p; |
835 | ||
836 | /* historical alias */ | |
837 | if (!strcmp(format, "local")) | |
838 | format = "default-local"; | |
839 | ||
840 | mode->type = parse_date_type(format, &p); | |
841 | mode->local = 0; | |
842 | ||
843 | if (skip_prefix(p, "-local", &p)) | |
844 | mode->local = 1; | |
845 | ||
846 | if (mode->type == DATE_STRFTIME) { | |
847 | if (!skip_prefix(p, ":", &p)) | |
848 | die("date format missing colon separator: %s", format); | |
849 | mode->strftime_fmt = xstrdup(p); | |
850 | } else if (*p) | |
856665f8 AP |
851 | die("unknown date format %s", format); |
852 | } | |
853 | ||
c33ddc2e | 854 | void datestamp(struct strbuf *out) |
ecee9d9e ET |
855 | { |
856 | time_t now; | |
857 | int offset; | |
858 | ||
859 | time(&now); | |
860 | ||
bb5799d6 | 861 | offset = tm_to_time_t(localtime(&now)) - now; |
ecee9d9e ET |
862 | offset /= 60; |
863 | ||
c33ddc2e | 864 | date_string(now, offset, out); |
ecee9d9e | 865 | } |
3c07b1d1 | 866 | |
90290552 LT |
867 | /* |
868 | * Relative time update (eg "2 days ago"). If we haven't set the time | |
869 | * yet, we need to set it from current time. | |
870 | */ | |
dddbad72 | 871 | static time_t update_tm(struct tm *tm, struct tm *now, time_t sec) |
3c07b1d1 | 872 | { |
90290552 LT |
873 | time_t n; |
874 | ||
875 | if (tm->tm_mday < 0) | |
876 | tm->tm_mday = now->tm_mday; | |
877 | if (tm->tm_mon < 0) | |
878 | tm->tm_mon = now->tm_mon; | |
879 | if (tm->tm_year < 0) { | |
880 | tm->tm_year = now->tm_year; | |
881 | if (tm->tm_mon > now->tm_mon) | |
882 | tm->tm_year--; | |
883 | } | |
884 | ||
885 | n = mktime(tm) - sec; | |
3c07b1d1 | 886 | localtime_r(&n, tm); |
90290552 | 887 | return n; |
3c07b1d1 LT |
888 | } |
889 | ||
93cfa7c7 JH |
890 | static void date_now(struct tm *tm, struct tm *now, int *num) |
891 | { | |
892 | update_tm(tm, now, 0); | |
893 | } | |
894 | ||
90290552 | 895 | static void date_yesterday(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 896 | { |
90290552 | 897 | update_tm(tm, now, 24*60*60); |
a8aca418 LT |
898 | } |
899 | ||
90290552 | 900 | static void date_time(struct tm *tm, struct tm *now, int hour) |
a8aca418 LT |
901 | { |
902 | if (tm->tm_hour < hour) | |
90290552 | 903 | date_yesterday(tm, now, NULL); |
a8aca418 LT |
904 | tm->tm_hour = hour; |
905 | tm->tm_min = 0; | |
906 | tm->tm_sec = 0; | |
907 | } | |
908 | ||
90290552 | 909 | static void date_midnight(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 910 | { |
90290552 | 911 | date_time(tm, now, 0); |
a8aca418 LT |
912 | } |
913 | ||
90290552 | 914 | static void date_noon(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 915 | { |
90290552 | 916 | date_time(tm, now, 12); |
a8aca418 LT |
917 | } |
918 | ||
90290552 | 919 | static void date_tea(struct tm *tm, struct tm *now, int *num) |
a8aca418 | 920 | { |
90290552 | 921 | date_time(tm, now, 17); |
a8aca418 LT |
922 | } |
923 | ||
90290552 | 924 | static void date_pm(struct tm *tm, struct tm *now, int *num) |
393d340e | 925 | { |
18b633ca | 926 | int hour, n = *num; |
393d340e LT |
927 | *num = 0; |
928 | ||
18b633ca LT |
929 | hour = tm->tm_hour; |
930 | if (n) { | |
931 | hour = n; | |
393d340e LT |
932 | tm->tm_min = 0; |
933 | tm->tm_sec = 0; | |
934 | } | |
18b633ca | 935 | tm->tm_hour = (hour % 12) + 12; |
393d340e LT |
936 | } |
937 | ||
90290552 | 938 | static void date_am(struct tm *tm, struct tm *now, int *num) |
393d340e | 939 | { |
18b633ca | 940 | int hour, n = *num; |
393d340e LT |
941 | *num = 0; |
942 | ||
18b633ca LT |
943 | hour = tm->tm_hour; |
944 | if (n) { | |
945 | hour = n; | |
393d340e LT |
946 | tm->tm_min = 0; |
947 | tm->tm_sec = 0; | |
948 | } | |
18b633ca | 949 | tm->tm_hour = (hour % 12); |
393d340e LT |
950 | } |
951 | ||
90290552 | 952 | static void date_never(struct tm *tm, struct tm *now, int *num) |
af66366a | 953 | { |
8c6b5786 OM |
954 | time_t n = 0; |
955 | localtime_r(&n, tm); | |
af66366a JS |
956 | } |
957 | ||
a8aca418 LT |
958 | static const struct special { |
959 | const char *name; | |
90290552 | 960 | void (*fn)(struct tm *, struct tm *, int *); |
a8aca418 LT |
961 | } special[] = { |
962 | { "yesterday", date_yesterday }, | |
963 | { "noon", date_noon }, | |
964 | { "midnight", date_midnight }, | |
965 | { "tea", date_tea }, | |
393d340e LT |
966 | { "PM", date_pm }, |
967 | { "AM", date_am }, | |
af66366a | 968 | { "never", date_never }, |
93cfa7c7 | 969 | { "now", date_now }, |
a8aca418 LT |
970 | { NULL } |
971 | }; | |
972 | ||
3c07b1d1 LT |
973 | static const char *number_name[] = { |
974 | "zero", "one", "two", "three", "four", | |
975 | "five", "six", "seven", "eight", "nine", "ten", | |
976 | }; | |
977 | ||
a8aca418 | 978 | static const struct typelen { |
3c07b1d1 LT |
979 | const char *type; |
980 | int length; | |
981 | } typelen[] = { | |
982 | { "seconds", 1 }, | |
983 | { "minutes", 60 }, | |
984 | { "hours", 60*60 }, | |
985 | { "days", 24*60*60 }, | |
986 | { "weeks", 7*24*60*60 }, | |
987 | { NULL } | |
a6080a0a | 988 | }; |
3c07b1d1 | 989 | |
93cfa7c7 | 990 | static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm *now, int *num, int *touched) |
3c07b1d1 | 991 | { |
a8aca418 LT |
992 | const struct typelen *tl; |
993 | const struct special *s; | |
3c07b1d1 | 994 | const char *end = date; |
5df7dbba | 995 | int i; |
3c07b1d1 | 996 | |
38db01b7 | 997 | while (isalpha(*++end)) |
5df7dbba | 998 | ; |
3c07b1d1 LT |
999 | |
1000 | for (i = 0; i < 12; i++) { | |
1001 | int match = match_string(date, month_names[i]); | |
1002 | if (match >= 3) { | |
1003 | tm->tm_mon = i; | |
93cfa7c7 | 1004 | *touched = 1; |
3c07b1d1 LT |
1005 | return end; |
1006 | } | |
1007 | } | |
1008 | ||
a8aca418 LT |
1009 | for (s = special; s->name; s++) { |
1010 | int len = strlen(s->name); | |
1011 | if (match_string(date, s->name) == len) { | |
90290552 | 1012 | s->fn(tm, now, num); |
93cfa7c7 | 1013 | *touched = 1; |
a8aca418 LT |
1014 | return end; |
1015 | } | |
3c07b1d1 LT |
1016 | } |
1017 | ||
1018 | if (!*num) { | |
1019 | for (i = 1; i < 11; i++) { | |
1020 | int len = strlen(number_name[i]); | |
1021 | if (match_string(date, number_name[i]) == len) { | |
1022 | *num = i; | |
93cfa7c7 | 1023 | *touched = 1; |
3c07b1d1 LT |
1024 | return end; |
1025 | } | |
1026 | } | |
93cfa7c7 | 1027 | if (match_string(date, "last") == 4) { |
3c07b1d1 | 1028 | *num = 1; |
93cfa7c7 JH |
1029 | *touched = 1; |
1030 | } | |
3c07b1d1 LT |
1031 | return end; |
1032 | } | |
1033 | ||
1034 | tl = typelen; | |
1035 | while (tl->type) { | |
1036 | int len = strlen(tl->type); | |
1037 | if (match_string(date, tl->type) >= len-1) { | |
90290552 | 1038 | update_tm(tm, now, tl->length * *num); |
3c07b1d1 | 1039 | *num = 0; |
93cfa7c7 | 1040 | *touched = 1; |
3c07b1d1 LT |
1041 | return end; |
1042 | } | |
1043 | tl++; | |
1044 | } | |
1045 | ||
6b7b0427 LT |
1046 | for (i = 0; i < 7; i++) { |
1047 | int match = match_string(date, weekday_names[i]); | |
1048 | if (match >= 3) { | |
1049 | int diff, n = *num -1; | |
1050 | *num = 0; | |
1051 | ||
1052 | diff = tm->tm_wday - i; | |
1053 | if (diff <= 0) | |
1054 | n++; | |
1055 | diff += 7*n; | |
1056 | ||
90290552 | 1057 | update_tm(tm, now, diff * 24 * 60 * 60); |
93cfa7c7 | 1058 | *touched = 1; |
6b7b0427 LT |
1059 | return end; |
1060 | } | |
1061 | } | |
1062 | ||
3c07b1d1 | 1063 | if (match_string(date, "months") >= 5) { |
931e8e27 JK |
1064 | int n; |
1065 | update_tm(tm, now, 0); /* fill in date fields if needed */ | |
1066 | n = tm->tm_mon - *num; | |
3c07b1d1 LT |
1067 | *num = 0; |
1068 | while (n < 0) { | |
1069 | n += 12; | |
1070 | tm->tm_year--; | |
1071 | } | |
1072 | tm->tm_mon = n; | |
93cfa7c7 | 1073 | *touched = 1; |
3c07b1d1 LT |
1074 | return end; |
1075 | } | |
1076 | ||
1077 | if (match_string(date, "years") >= 4) { | |
931e8e27 | 1078 | update_tm(tm, now, 0); /* fill in date fields if needed */ |
3c07b1d1 LT |
1079 | tm->tm_year -= *num; |
1080 | *num = 0; | |
93cfa7c7 | 1081 | *touched = 1; |
3c07b1d1 LT |
1082 | return end; |
1083 | } | |
1084 | ||
1085 | return end; | |
1086 | } | |
1087 | ||
073281e2 JK |
1088 | static const char *approxidate_digit(const char *date, struct tm *tm, int *num, |
1089 | time_t now) | |
e92a54d9 LT |
1090 | { |
1091 | char *end; | |
dddbad72 | 1092 | timestamp_t number = parse_timestamp(date, &end, 10); |
e92a54d9 | 1093 | |
393d340e LT |
1094 | switch (*end) { |
1095 | case ':': | |
1096 | case '.': | |
1097 | case '/': | |
1098 | case '-': | |
1099 | if (isdigit(end[1])) { | |
073281e2 JK |
1100 | int match = match_multi_number(number, *end, date, end, |
1101 | tm, now); | |
393d340e LT |
1102 | if (match) |
1103 | return date + match; | |
1104 | } | |
1105 | } | |
1106 | ||
9f2b6d29 LT |
1107 | /* Accept zero-padding only for small numbers ("Dec 02", never "Dec 0002") */ |
1108 | if (date[0] != '0' || end - date <= 2) | |
1109 | *num = number; | |
e92a54d9 LT |
1110 | return end; |
1111 | } | |
1112 | ||
90290552 LT |
1113 | /* |
1114 | * Do we have a pending number at the end, or when | |
1115 | * we see a new one? Let's assume it's a month day, | |
1116 | * as in "Dec 6, 1992" | |
1117 | */ | |
1118 | static void pending_number(struct tm *tm, int *num) | |
1119 | { | |
1120 | int number = *num; | |
1121 | ||
1122 | if (number) { | |
1123 | *num = 0; | |
1124 | if (tm->tm_mday < 0 && number < 32) | |
1125 | tm->tm_mday = number; | |
36e4986f LT |
1126 | else if (tm->tm_mon < 0 && number < 13) |
1127 | tm->tm_mon = number-1; | |
1128 | else if (tm->tm_year < 0) { | |
1129 | if (number > 1969 && number < 2100) | |
1130 | tm->tm_year = number - 1900; | |
1131 | else if (number > 69 && number < 100) | |
1132 | tm->tm_year = number; | |
1133 | else if (number < 38) | |
1134 | tm->tm_year = 100 + number; | |
1135 | /* We screw up for number = 00 ? */ | |
1136 | } | |
90290552 LT |
1137 | } |
1138 | } | |
1139 | ||
dddbad72 JS |
1140 | static timestamp_t approxidate_str(const char *date, |
1141 | const struct timeval *tv, | |
1142 | int *error_ret) | |
3c07b1d1 LT |
1143 | { |
1144 | int number = 0; | |
93cfa7c7 | 1145 | int touched = 0; |
3c07b1d1 | 1146 | struct tm tm, now; |
f697b33b | 1147 | time_t time_sec; |
3c07b1d1 | 1148 | |
33012fc4 | 1149 | time_sec = tv->tv_sec; |
f697b33b | 1150 | localtime_r(&time_sec, &tm); |
3c07b1d1 | 1151 | now = tm; |
90290552 LT |
1152 | |
1153 | tm.tm_year = -1; | |
1154 | tm.tm_mon = -1; | |
1155 | tm.tm_mday = -1; | |
1156 | ||
3c07b1d1 LT |
1157 | for (;;) { |
1158 | unsigned char c = *date; | |
1159 | if (!c) | |
1160 | break; | |
1161 | date++; | |
1162 | if (isdigit(c)) { | |
90290552 | 1163 | pending_number(&tm, &number); |
073281e2 | 1164 | date = approxidate_digit(date-1, &tm, &number, time_sec); |
93cfa7c7 | 1165 | touched = 1; |
3c07b1d1 LT |
1166 | continue; |
1167 | } | |
1168 | if (isalpha(c)) | |
93cfa7c7 | 1169 | date = approxidate_alpha(date-1, &tm, &now, &number, &touched); |
3c07b1d1 | 1170 | } |
90290552 | 1171 | pending_number(&tm, &number); |
93cfa7c7 JH |
1172 | if (!touched) |
1173 | *error_ret = 1; | |
dddbad72 | 1174 | return (timestamp_t)update_tm(&tm, &now, 0); |
3c07b1d1 | 1175 | } |
33012fc4 | 1176 | |
dddbad72 | 1177 | timestamp_t approxidate_relative(const char *date, const struct timeval *tv) |
33012fc4 | 1178 | { |
dddbad72 | 1179 | timestamp_t timestamp; |
c5043cc1 | 1180 | int offset; |
93cfa7c7 | 1181 | int errors = 0; |
33012fc4 | 1182 | |
9644c061 | 1183 | if (!parse_date_basic(date, ×tamp, &offset)) |
c5043cc1 | 1184 | return timestamp; |
93cfa7c7 | 1185 | return approxidate_str(date, tv, &errors); |
33012fc4 AR |
1186 | } |
1187 | ||
dddbad72 | 1188 | timestamp_t approxidate_careful(const char *date, int *error_ret) |
33012fc4 AR |
1189 | { |
1190 | struct timeval tv; | |
dddbad72 | 1191 | timestamp_t timestamp; |
c5043cc1 | 1192 | int offset; |
93cfa7c7 JH |
1193 | int dummy = 0; |
1194 | if (!error_ret) | |
1195 | error_ret = &dummy; | |
33012fc4 | 1196 | |
9644c061 | 1197 | if (!parse_date_basic(date, ×tamp, &offset)) { |
93cfa7c7 | 1198 | *error_ret = 0; |
c5043cc1 | 1199 | return timestamp; |
93cfa7c7 | 1200 | } |
33012fc4 AR |
1201 | |
1202 | gettimeofday(&tv, NULL); | |
93cfa7c7 | 1203 | return approxidate_str(date, &tv, error_ret); |
33012fc4 | 1204 | } |
7ca36d93 | 1205 | |
dddbad72 | 1206 | int date_overflows(timestamp_t t) |
7ca36d93 JK |
1207 | { |
1208 | time_t sys; | |
1209 | ||
dddbad72 JS |
1210 | /* If we overflowed our timestamp data type, that's bad... */ |
1211 | if ((uintmax_t)t >= TIME_MAX) | |
7ca36d93 JK |
1212 | return 1; |
1213 | ||
1214 | /* | |
1215 | * ...but we also are going to feed the result to system | |
1216 | * functions that expect time_t, which is often "signed long". | |
1217 | * Make sure that we fit into time_t, as well. | |
1218 | */ | |
1219 | sys = t; | |
1220 | return t != sys || (t < 1) != (sys < 1); | |
1221 | } |