1 | /* Copyright (C) 2002-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #ifdef HAVE_CONFIG_H |
19 | # include <config.h> |
20 | #endif |
21 | |
22 | #include <assert.h> |
23 | #include <ctype.h> |
24 | #include <langinfo.h> |
25 | #include <limits.h> |
26 | #include <string.h> |
27 | #include <time.h> |
28 | #include <stdbool.h> |
29 | |
30 | #ifdef _LIBC |
31 | # define HAVE_LOCALTIME_R 0 |
32 | # include "../locale/localeinfo.h" |
33 | |
34 | # define time_t __time64_t |
35 | # define __localtime_r(t, tp) __localtime64_r (t, tp) |
36 | #endif |
37 | |
38 | #if ! HAVE_LOCALTIME_R && ! defined localtime_r |
39 | # ifdef _LIBC |
40 | # define localtime_r __localtime_r |
41 | # else |
42 | /* Approximate localtime_r as best we can in its absence. */ |
43 | # define localtime_r my_localtime_r |
44 | static struct tm *localtime_r (const time_t *, struct tm *); |
45 | static struct tm * |
46 | localtime_r (const time_t *t, struct tm *tp) |
47 | { |
48 | struct tm *l = localtime (t); |
49 | if (! l) |
50 | return 0; |
51 | *tp = *l; |
52 | return tp; |
53 | } |
54 | # endif /* ! _LIBC */ |
55 | #endif /* ! HAVE_LOCALTIME_R && ! defined (localtime_r) */ |
56 | |
57 | |
58 | #define match_char(ch1, ch2) if (ch1 != ch2) return NULL |
59 | #if defined __GNUC__ && __GNUC__ >= 2 |
60 | # define match_string(cs1, s2) \ |
61 | ({ size_t len = strlen (cs1); \ |
62 | int result = __strncasecmp_l ((cs1), (s2), len, locale) == 0; \ |
63 | if (result) (s2) += len; \ |
64 | result; }) |
65 | #else |
66 | /* Oh come on. Get a reasonable compiler. */ |
67 | # define match_string(cs1, s2) \ |
68 | (strncasecmp ((cs1), (s2), strlen (cs1)) ? 0 : ((s2) += strlen (cs1), 1)) |
69 | #endif |
70 | /* We intentionally do not use isdigit() for testing because this will |
71 | lead to problems with the wide character version. */ |
72 | #define get_number(from, to, n) \ |
73 | do { \ |
74 | int __n = n; \ |
75 | val = 0; \ |
76 | while (ISSPACE (*rp)) \ |
77 | ++rp; \ |
78 | if (*rp < '0' || *rp > '9') \ |
79 | return NULL; \ |
80 | do { \ |
81 | val *= 10; \ |
82 | val += *rp++ - '0'; \ |
83 | } while (--__n > 0 && val * 10 <= to && *rp >= '0' && *rp <= '9'); \ |
84 | if (val < from || val > to) \ |
85 | return NULL; \ |
86 | } while (0) |
87 | #ifdef _NL_CURRENT |
88 | # define get_alt_number(from, to, n) \ |
89 | ({ \ |
90 | __label__ do_normal; \ |
91 | \ |
92 | if (s.decided != raw) \ |
93 | { \ |
94 | val = _nl_parse_alt_digit (&rp HELPER_LOCALE_ARG); \ |
95 | if (val == -1 && s.decided != loc) \ |
96 | { \ |
97 | s.decided = loc; \ |
98 | goto do_normal; \ |
99 | } \ |
100 | if (val < from || val > to) \ |
101 | return NULL; \ |
102 | } \ |
103 | else \ |
104 | { \ |
105 | do_normal: \ |
106 | get_number (from, to, n); \ |
107 | } \ |
108 | 0; \ |
109 | }) |
110 | #else |
111 | # define get_alt_number(from, to, n) \ |
112 | /* We don't have the alternate representation. */ \ |
113 | get_number(from, to, n) |
114 | #endif |
115 | #define recursive(new_fmt) \ |
116 | (*(new_fmt) != '\0' \ |
117 | && (rp = __strptime_internal (rp, (new_fmt), tm, &s LOCALE_ARG)) != NULL) |
118 | |
119 | |
120 | #ifdef _LIBC |
121 | /* This is defined in locale/C-time.c in the GNU libc. */ |
122 | extern const struct __locale_data _nl_C_LC_TIME attribute_hidden; |
123 | |
124 | # define weekday_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (DAY_1)].string) |
125 | # define ab_weekday_name \ |
126 | (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABDAY_1)].string) |
127 | # define month_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (MON_1)].string) |
128 | # define ab_month_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABMON_1)].string) |
129 | # define alt_month_name \ |
130 | (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ALTMON_1)].string) |
131 | # define ab_alt_month_name \ |
132 | (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (_NL_ABALTMON_1)].string) |
133 | # define HERE_D_T_FMT (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (D_T_FMT)].string) |
134 | # define HERE_D_FMT (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (D_FMT)].string) |
135 | # define HERE_AM_STR (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (AM_STR)].string) |
136 | # define HERE_PM_STR (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (PM_STR)].string) |
137 | # define HERE_T_FMT_AMPM \ |
138 | (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (T_FMT_AMPM)].string) |
139 | # define HERE_T_FMT (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (T_FMT)].string) |
140 | |
141 | # define strncasecmp(s1, s2, n) __strncasecmp (s1, s2, n) |
142 | #else |
143 | static char const weekday_name[][10] = |
144 | { |
145 | "Sunday" , "Monday" , "Tuesday" , "Wednesday" , |
146 | "Thursday" , "Friday" , "Saturday" |
147 | }; |
148 | static char const ab_weekday_name[][4] = |
149 | { |
150 | "Sun" , "Mon" , "Tue" , "Wed" , "Thu" , "Fri" , "Sat" |
151 | }; |
152 | static char const month_name[][10] = |
153 | { |
154 | "January" , "February" , "March" , "April" , "May" , "June" , |
155 | "July" , "August" , "September" , "October" , "November" , "December" |
156 | }; |
157 | static char const ab_month_name[][4] = |
158 | { |
159 | "Jan" , "Feb" , "Mar" , "Apr" , "May" , "Jun" , |
160 | "Jul" , "Aug" , "Sep" , "Oct" , "Nov" , "Dec" |
161 | }; |
162 | # define HERE_D_T_FMT "%a %b %e %H:%M:%S %Y" |
163 | # define HERE_D_FMT "%m/%d/%y" |
164 | # define HERE_AM_STR "AM" |
165 | # define HERE_PM_STR "PM" |
166 | # define HERE_T_FMT_AMPM "%I:%M:%S %p" |
167 | # define HERE_T_FMT "%H:%M:%S" |
168 | |
169 | static const unsigned short int __mon_yday[2][13] = |
170 | { |
171 | /* Normal years. */ |
172 | { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, |
173 | /* Leap years. */ |
174 | { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } |
175 | }; |
176 | #endif |
177 | |
178 | #if defined _LIBC |
179 | /* We use this code also for the extended locale handling where the |
180 | function gets as an additional argument the locale which has to be |
181 | used. To access the values we have to redefine the _NL_CURRENT |
182 | macro. */ |
183 | # define strptime __strptime_l |
184 | # undef _NL_CURRENT |
185 | # define _NL_CURRENT(category, item) \ |
186 | (current->values[_NL_ITEM_INDEX (item)].string) |
187 | # undef _NL_CURRENT_WORD |
188 | # define _NL_CURRENT_WORD(category, item) \ |
189 | (current->values[_NL_ITEM_INDEX (item)].word) |
190 | # define LOCALE_PARAM , locale_t locale |
191 | # define LOCALE_ARG , locale |
192 | # define HELPER_LOCALE_ARG , current |
193 | # define ISSPACE(Ch) __isspace_l (Ch, locale) |
194 | #else |
195 | # define LOCALE_PARAM |
196 | # define LOCALE_ARG |
197 | # define HELPER_LOCALE_ARG |
198 | # define ISSPACE(Ch) isspace (Ch) |
199 | #endif |
200 | |
201 | |
202 | |
203 | |
204 | #ifndef __isleap |
205 | /* Nonzero if YEAR is a leap year (every 4 years, |
206 | except every 100th isn't, and every 400th is). */ |
207 | # define __isleap(year) \ |
208 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) |
209 | #endif |
210 | |
211 | /* Compute the day of the week. */ |
212 | static void |
213 | day_of_the_week (struct tm *tm) |
214 | { |
215 | /* We know that January 1st 1970 was a Thursday (= 4). Compute the |
216 | difference between this data in the one on TM and so determine |
217 | the weekday. */ |
218 | int corr_year = 1900 + tm->tm_year - (tm->tm_mon < 2); |
219 | int wday = (-473 |
220 | + (365 * (tm->tm_year - 70)) |
221 | + (corr_year / 4) |
222 | - ((corr_year / 4) / 25) + ((corr_year / 4) % 25 < 0) |
223 | + (((corr_year / 4) / 25) / 4) |
224 | + __mon_yday[0][tm->tm_mon] |
225 | + tm->tm_mday - 1); |
226 | tm->tm_wday = ((wday % 7) + 7) % 7; |
227 | } |
228 | |
229 | /* Compute the day of the year. */ |
230 | static void |
231 | day_of_the_year (struct tm *tm) |
232 | { |
233 | tm->tm_yday = (__mon_yday[__isleap (1900 + tm->tm_year)][tm->tm_mon] |
234 | + (tm->tm_mday - 1)); |
235 | } |
236 | |
237 | |
238 | #ifdef _LIBC |
239 | char * |
240 | #else |
241 | static char * |
242 | #endif |
243 | __strptime_internal (const char *rp, const char *fmt, struct tm *tmp, |
244 | void *statep LOCALE_PARAM) |
245 | { |
246 | #ifdef _LIBC |
247 | struct __locale_data *const current = locale->__locales[LC_TIME]; |
248 | #endif |
249 | |
250 | const char *rp_backup; |
251 | const char *rp_longest; |
252 | int cnt; |
253 | int cnt_longest; |
254 | size_t val; |
255 | size_t num_eras; |
256 | struct era_entry *era = NULL; |
257 | enum ptime_locale_status { not, loc, raw } decided_longest; |
258 | struct __strptime_state |
259 | { |
260 | unsigned int have_I : 1; |
261 | unsigned int have_wday : 1; |
262 | unsigned int have_yday : 1; |
263 | unsigned int have_mon : 1; |
264 | unsigned int have_mday : 1; |
265 | unsigned int have_uweek : 1; |
266 | unsigned int have_wweek : 1; |
267 | unsigned int is_pm : 1; |
268 | unsigned int want_century : 1; |
269 | unsigned int want_era : 1; |
270 | unsigned int want_xday : 1; |
271 | enum ptime_locale_status decided : 2; |
272 | signed char week_no; |
273 | signed char century; |
274 | int era_cnt; |
275 | } s; |
276 | struct tm tmb; |
277 | struct tm *tm; |
278 | |
279 | if (statep == NULL) |
280 | { |
281 | memset (&s, 0, sizeof (s)); |
282 | s.century = -1; |
283 | s.era_cnt = -1; |
284 | #ifdef _NL_CURRENT |
285 | s.decided = not; |
286 | #else |
287 | s.decided = raw; |
288 | #endif |
289 | tm = tmp; |
290 | } |
291 | else |
292 | { |
293 | s = *(struct __strptime_state *) statep; |
294 | tmb = *tmp; |
295 | tm = &tmb; |
296 | } |
297 | |
298 | while (*fmt != '\0') |
299 | { |
300 | /* A white space in the format string matches 0 more or white |
301 | space in the input string. */ |
302 | if (ISSPACE (*fmt)) |
303 | { |
304 | while (ISSPACE (*rp)) |
305 | ++rp; |
306 | ++fmt; |
307 | continue; |
308 | } |
309 | |
310 | /* Any character but `%' must be matched by the same character |
311 | in the input string. */ |
312 | if (*fmt != '%') |
313 | { |
314 | match_char (*fmt++, *rp++); |
315 | continue; |
316 | } |
317 | |
318 | ++fmt; |
319 | /* We discard strftime modifiers. */ |
320 | while (*fmt == '-' || *fmt == '_' || *fmt == '0' |
321 | || *fmt == '^' || *fmt == '#') |
322 | ++fmt; |
323 | |
324 | /* And field width. */ |
325 | while (*fmt >= '0' && *fmt <= '9') |
326 | ++fmt; |
327 | |
328 | /* In some cases, modifiers are handled by adjusting state and |
329 | then restarting the switch statement below. */ |
330 | start_over: |
331 | |
332 | /* Make back up of current processing pointer. */ |
333 | rp_backup = rp; |
334 | |
335 | switch (*fmt++) |
336 | { |
337 | case '%': |
338 | /* Match the `%' character itself. */ |
339 | match_char ('%', *rp++); |
340 | break; |
341 | case 'a': |
342 | case 'A': |
343 | /* Match day of week. */ |
344 | rp_longest = NULL; |
345 | decided_longest = s.decided; |
346 | cnt_longest = -1; |
347 | for (cnt = 0; cnt < 7; ++cnt) |
348 | { |
349 | const char *trp; |
350 | #ifdef _NL_CURRENT |
351 | if (s.decided !=raw) |
352 | { |
353 | trp = rp; |
354 | if (match_string (_NL_CURRENT (LC_TIME, DAY_1 + cnt), trp) |
355 | && trp > rp_longest) |
356 | { |
357 | rp_longest = trp; |
358 | cnt_longest = cnt; |
359 | if (s.decided == not |
360 | && strcmp (_NL_CURRENT (LC_TIME, DAY_1 + cnt), |
361 | weekday_name[cnt])) |
362 | decided_longest = loc; |
363 | } |
364 | trp = rp; |
365 | if (match_string (_NL_CURRENT (LC_TIME, ABDAY_1 + cnt), trp) |
366 | && trp > rp_longest) |
367 | { |
368 | rp_longest = trp; |
369 | cnt_longest = cnt; |
370 | if (s.decided == not |
371 | && strcmp (_NL_CURRENT (LC_TIME, ABDAY_1 + cnt), |
372 | ab_weekday_name[cnt])) |
373 | decided_longest = loc; |
374 | } |
375 | } |
376 | #endif |
377 | if (s.decided != loc |
378 | && (((trp = rp, match_string (weekday_name[cnt], trp)) |
379 | && trp > rp_longest) |
380 | || ((trp = rp, match_string (ab_weekday_name[cnt], rp)) |
381 | && trp > rp_longest))) |
382 | { |
383 | rp_longest = trp; |
384 | cnt_longest = cnt; |
385 | decided_longest = raw; |
386 | } |
387 | } |
388 | if (rp_longest == NULL) |
389 | /* Does not match a weekday name. */ |
390 | return NULL; |
391 | rp = rp_longest; |
392 | s.decided = decided_longest; |
393 | tm->tm_wday = cnt_longest; |
394 | s.have_wday = 1; |
395 | break; |
396 | case 'b': |
397 | case 'B': |
398 | case 'h': |
399 | /* Match month name. */ |
400 | rp_longest = NULL; |
401 | decided_longest = s.decided; |
402 | cnt_longest = -1; |
403 | for (cnt = 0; cnt < 12; ++cnt) |
404 | { |
405 | const char *trp; |
406 | #ifdef _NL_CURRENT |
407 | if (s.decided !=raw) |
408 | { |
409 | trp = rp; |
410 | if (match_string (_NL_CURRENT (LC_TIME, MON_1 + cnt), trp) |
411 | && trp > rp_longest) |
412 | { |
413 | rp_longest = trp; |
414 | cnt_longest = cnt; |
415 | if (s.decided == not |
416 | && strcmp (_NL_CURRENT (LC_TIME, MON_1 + cnt), |
417 | month_name[cnt])) |
418 | decided_longest = loc; |
419 | } |
420 | trp = rp; |
421 | if (match_string (_NL_CURRENT (LC_TIME, ABMON_1 + cnt), trp) |
422 | && trp > rp_longest) |
423 | { |
424 | rp_longest = trp; |
425 | cnt_longest = cnt; |
426 | if (s.decided == not |
427 | && strcmp (_NL_CURRENT (LC_TIME, ABMON_1 + cnt), |
428 | ab_month_name[cnt])) |
429 | decided_longest = loc; |
430 | } |
431 | #ifdef _LIBC |
432 | /* Now check the alt month. */ |
433 | trp = rp; |
434 | if (match_string (_NL_CURRENT (LC_TIME, ALTMON_1 + cnt), trp) |
435 | && trp > rp_longest) |
436 | { |
437 | rp_longest = trp; |
438 | cnt_longest = cnt; |
439 | if (s.decided == not |
440 | && strcmp (_NL_CURRENT (LC_TIME, ALTMON_1 + cnt), |
441 | alt_month_name[cnt])) |
442 | decided_longest = loc; |
443 | } |
444 | trp = rp; |
445 | if (match_string (_NL_CURRENT (LC_TIME, _NL_ABALTMON_1 + cnt), |
446 | trp) |
447 | && trp > rp_longest) |
448 | { |
449 | rp_longest = trp; |
450 | cnt_longest = cnt; |
451 | if (s.decided == not |
452 | && strcmp (_NL_CURRENT (LC_TIME, _NL_ABALTMON_1 + cnt), |
453 | alt_month_name[cnt])) |
454 | decided_longest = loc; |
455 | } |
456 | #endif |
457 | } |
458 | #endif |
459 | if (s.decided != loc |
460 | && (((trp = rp, match_string (month_name[cnt], trp)) |
461 | && trp > rp_longest) |
462 | || ((trp = rp, match_string (ab_month_name[cnt], trp)) |
463 | && trp > rp_longest) |
464 | #ifdef _LIBC |
465 | || ((trp = rp, match_string (alt_month_name[cnt], trp)) |
466 | && trp > rp_longest) |
467 | || ((trp = rp, match_string (ab_alt_month_name[cnt], trp)) |
468 | && trp > rp_longest) |
469 | #endif |
470 | )) |
471 | { |
472 | rp_longest = trp; |
473 | cnt_longest = cnt; |
474 | decided_longest = raw; |
475 | } |
476 | } |
477 | if (rp_longest == NULL) |
478 | /* Does not match a month name. */ |
479 | return NULL; |
480 | rp = rp_longest; |
481 | s.decided = decided_longest; |
482 | tm->tm_mon = cnt_longest; |
483 | s.have_mon = 1; |
484 | s.want_xday = 1; |
485 | break; |
486 | case 'c': |
487 | /* Match locale's date and time format. */ |
488 | #ifdef _NL_CURRENT |
489 | if (s.decided != raw) |
490 | { |
491 | if (!recursive (_NL_CURRENT (LC_TIME, D_T_FMT))) |
492 | { |
493 | if (s.decided == loc) |
494 | return NULL; |
495 | else |
496 | rp = rp_backup; |
497 | } |
498 | else |
499 | { |
500 | if (s.decided == not |
501 | && strcmp (_NL_CURRENT (LC_TIME, D_T_FMT), HERE_D_T_FMT)) |
502 | s.decided = loc; |
503 | s.want_xday = 1; |
504 | break; |
505 | } |
506 | s.decided = raw; |
507 | } |
508 | #endif |
509 | if (!recursive (HERE_D_T_FMT)) |
510 | return NULL; |
511 | s.want_xday = 1; |
512 | break; |
513 | case 'C': |
514 | /* Match century number. */ |
515 | match_century: |
516 | get_number (0, 99, 2); |
517 | s.century = val; |
518 | s.want_xday = 1; |
519 | break; |
520 | case 'd': |
521 | case 'e': |
522 | /* Match day of month. */ |
523 | get_number (1, 31, 2); |
524 | tm->tm_mday = val; |
525 | s.have_mday = 1; |
526 | s.want_xday = 1; |
527 | break; |
528 | case 'F': |
529 | if (!recursive ("%Y-%m-%d" )) |
530 | return NULL; |
531 | s.want_xday = 1; |
532 | break; |
533 | case 'x': |
534 | #ifdef _NL_CURRENT |
535 | if (s.decided != raw) |
536 | { |
537 | if (!recursive (_NL_CURRENT (LC_TIME, D_FMT))) |
538 | { |
539 | if (s.decided == loc) |
540 | return NULL; |
541 | else |
542 | rp = rp_backup; |
543 | } |
544 | else |
545 | { |
546 | if (s.decided == not |
547 | && strcmp (_NL_CURRENT (LC_TIME, D_FMT), HERE_D_FMT)) |
548 | s.decided = loc; |
549 | s.want_xday = 1; |
550 | break; |
551 | } |
552 | s.decided = raw; |
553 | } |
554 | #endif |
555 | /* Fall through. */ |
556 | case 'D': |
557 | /* Match standard day format. */ |
558 | if (!recursive (HERE_D_FMT)) |
559 | return NULL; |
560 | s.want_xday = 1; |
561 | break; |
562 | case 'k': |
563 | case 'H': |
564 | /* Match hour in 24-hour clock. */ |
565 | get_number (0, 23, 2); |
566 | tm->tm_hour = val; |
567 | s.have_I = 0; |
568 | break; |
569 | case 'l': |
570 | /* Match hour in 12-hour clock. GNU extension. */ |
571 | case 'I': |
572 | /* Match hour in 12-hour clock. */ |
573 | get_number (1, 12, 2); |
574 | tm->tm_hour = val % 12; |
575 | s.have_I = 1; |
576 | break; |
577 | case 'j': |
578 | /* Match day number of year. */ |
579 | get_number (1, 366, 3); |
580 | tm->tm_yday = val - 1; |
581 | s.have_yday = 1; |
582 | break; |
583 | case 'm': |
584 | /* Match number of month. */ |
585 | get_number (1, 12, 2); |
586 | tm->tm_mon = val - 1; |
587 | s.have_mon = 1; |
588 | s.want_xday = 1; |
589 | break; |
590 | case 'M': |
591 | /* Match minute. */ |
592 | get_number (0, 59, 2); |
593 | tm->tm_min = val; |
594 | break; |
595 | case 'n': |
596 | case 't': |
597 | /* Match any white space. */ |
598 | while (ISSPACE (*rp)) |
599 | ++rp; |
600 | break; |
601 | case 'p': |
602 | /* Match locale's equivalent of AM/PM. */ |
603 | #ifdef _NL_CURRENT |
604 | if (s.decided != raw) |
605 | { |
606 | if (match_string (_NL_CURRENT (LC_TIME, AM_STR), rp)) |
607 | { |
608 | if (strcmp (_NL_CURRENT (LC_TIME, AM_STR), HERE_AM_STR)) |
609 | s.decided = loc; |
610 | s.is_pm = 0; |
611 | break; |
612 | } |
613 | if (match_string (_NL_CURRENT (LC_TIME, PM_STR), rp)) |
614 | { |
615 | if (strcmp (_NL_CURRENT (LC_TIME, PM_STR), HERE_PM_STR)) |
616 | s.decided = loc; |
617 | s.is_pm = 1; |
618 | break; |
619 | } |
620 | s.decided = raw; |
621 | } |
622 | #endif |
623 | if (!match_string (HERE_AM_STR, rp)) |
624 | { |
625 | if (match_string (HERE_PM_STR, rp)) |
626 | s.is_pm = 1; |
627 | else |
628 | return NULL; |
629 | } |
630 | else |
631 | s.is_pm = 0; |
632 | break; |
633 | case 'r': |
634 | #ifdef _NL_CURRENT |
635 | if (s.decided != raw) |
636 | { |
637 | if (!recursive (_NL_CURRENT (LC_TIME, T_FMT_AMPM))) |
638 | { |
639 | if (s.decided == loc) |
640 | return NULL; |
641 | else |
642 | rp = rp_backup; |
643 | } |
644 | else |
645 | { |
646 | if (s.decided == not |
647 | && strcmp (_NL_CURRENT (LC_TIME, T_FMT_AMPM), |
648 | HERE_T_FMT_AMPM)) |
649 | s.decided = loc; |
650 | break; |
651 | } |
652 | s.decided = raw; |
653 | } |
654 | #endif |
655 | if (!recursive (HERE_T_FMT_AMPM)) |
656 | return NULL; |
657 | break; |
658 | case 'R': |
659 | if (!recursive ("%H:%M" )) |
660 | return NULL; |
661 | break; |
662 | case 's': |
663 | { |
664 | /* The number of seconds may be very high so we cannot use |
665 | the `get_number' macro. Instead read the number |
666 | character for character and construct the result while |
667 | doing this. */ |
668 | time_t secs = 0; |
669 | if (*rp < '0' || *rp > '9') |
670 | /* We need at least one digit. */ |
671 | return NULL; |
672 | |
673 | do |
674 | { |
675 | secs *= 10; |
676 | secs += *rp++ - '0'; |
677 | } |
678 | while (*rp >= '0' && *rp <= '9'); |
679 | |
680 | if (localtime_r (&secs, tm) == NULL) |
681 | /* Error in function. */ |
682 | return NULL; |
683 | } |
684 | break; |
685 | case 'S': |
686 | get_number (0, 61, 2); |
687 | tm->tm_sec = val; |
688 | break; |
689 | case 'X': |
690 | #ifdef _NL_CURRENT |
691 | if (s.decided != raw) |
692 | { |
693 | if (!recursive (_NL_CURRENT (LC_TIME, T_FMT))) |
694 | { |
695 | if (s.decided == loc) |
696 | return NULL; |
697 | else |
698 | rp = rp_backup; |
699 | } |
700 | else |
701 | { |
702 | if (strcmp (_NL_CURRENT (LC_TIME, T_FMT), HERE_T_FMT)) |
703 | s.decided = loc; |
704 | break; |
705 | } |
706 | s.decided = raw; |
707 | } |
708 | #endif |
709 | /* Fall through. */ |
710 | case 'T': |
711 | if (!recursive (HERE_T_FMT)) |
712 | return NULL; |
713 | break; |
714 | case 'u': |
715 | get_number (1, 7, 1); |
716 | tm->tm_wday = val % 7; |
717 | s.have_wday = 1; |
718 | break; |
719 | case 'g': |
720 | get_number (0, 99, 2); |
721 | /* XXX This cannot determine any field in TM. */ |
722 | break; |
723 | case 'G': |
724 | if (*rp < '0' || *rp > '9') |
725 | return NULL; |
726 | /* XXX Ignore the number since we would need some more |
727 | information to compute a real date. */ |
728 | do |
729 | ++rp; |
730 | while (*rp >= '0' && *rp <= '9'); |
731 | break; |
732 | case 'U': |
733 | get_number (0, 53, 2); |
734 | s.week_no = val; |
735 | s.have_uweek = 1; |
736 | break; |
737 | case 'W': |
738 | get_number (0, 53, 2); |
739 | s.week_no = val; |
740 | s.have_wweek = 1; |
741 | break; |
742 | case 'V': |
743 | get_number (0, 53, 2); |
744 | /* XXX This cannot determine any field in TM without some |
745 | information. */ |
746 | break; |
747 | case 'w': |
748 | /* Match number of weekday. */ |
749 | get_number (0, 6, 1); |
750 | tm->tm_wday = val; |
751 | s.have_wday = 1; |
752 | break; |
753 | case 'y': |
754 | match_year_in_century: |
755 | /* Match year within century. */ |
756 | get_number (0, 99, 2); |
757 | /* The "Year 2000: The Millennium Rollover" paper suggests that |
758 | values in the range 69-99 refer to the twentieth century. */ |
759 | tm->tm_year = val >= 69 ? val : val + 100; |
760 | /* Indicate that we want to use the century, if specified. */ |
761 | s.want_century = 1; |
762 | s.want_xday = 1; |
763 | break; |
764 | case 'Y': |
765 | /* Match year including century number. */ |
766 | get_number (0, 9999, 4); |
767 | tm->tm_year = val - 1900; |
768 | s.want_century = 0; |
769 | s.want_xday = 1; |
770 | break; |
771 | case 'Z': |
772 | /* Read timezone but perform no conversion. */ |
773 | while (ISSPACE (*rp)) |
774 | rp++; |
775 | while (!ISSPACE (*rp) && *rp != '\0') |
776 | rp++; |
777 | break; |
778 | case 'z': |
779 | /* We recognize four formats: |
780 | 1. Two digits specify hours. |
781 | 2. Four digits specify hours and minutes. |
782 | 3. Two digits, ':', and two digits specify hours and minutes. |
783 | 4. 'Z' is equivalent to +0000. */ |
784 | { |
785 | val = 0; |
786 | while (ISSPACE (*rp)) |
787 | ++rp; |
788 | if (*rp == 'Z') |
789 | { |
790 | ++rp; |
791 | tm->tm_gmtoff = 0; |
792 | break; |
793 | } |
794 | if (*rp != '+' && *rp != '-') |
795 | return NULL; |
796 | bool neg = *rp++ == '-'; |
797 | int n = 0; |
798 | while (n < 4 && *rp >= '0' && *rp <= '9') |
799 | { |
800 | val = val * 10 + *rp++ - '0'; |
801 | ++n; |
802 | if (*rp == ':' && n == 2 && isdigit (*(rp + 1))) |
803 | ++rp; |
804 | } |
805 | if (n == 2) |
806 | val *= 100; |
807 | else if (n != 4) |
808 | /* Only two or four digits recognized. */ |
809 | return NULL; |
810 | else if (val % 100 >= 60) |
811 | /* Minutes valid range is 0 through 59. */ |
812 | return NULL; |
813 | tm->tm_gmtoff = (val / 100) * 3600 + (val % 100) * 60; |
814 | if (neg) |
815 | tm->tm_gmtoff = -tm->tm_gmtoff; |
816 | } |
817 | break; |
818 | case 'E': |
819 | #ifdef _NL_CURRENT |
820 | switch (*fmt++) |
821 | { |
822 | case 'c': |
823 | /* Match locale's alternate date and time format. */ |
824 | if (s.decided != raw) |
825 | { |
826 | const char *fmt = _NL_CURRENT (LC_TIME, ERA_D_T_FMT); |
827 | |
828 | if (*fmt == '\0') |
829 | fmt = _NL_CURRENT (LC_TIME, D_T_FMT); |
830 | |
831 | if (!recursive (fmt)) |
832 | { |
833 | if (s.decided == loc) |
834 | return NULL; |
835 | else |
836 | rp = rp_backup; |
837 | } |
838 | else |
839 | { |
840 | if (strcmp (fmt, HERE_D_T_FMT)) |
841 | s.decided = loc; |
842 | s.want_xday = 1; |
843 | break; |
844 | } |
845 | s.decided = raw; |
846 | } |
847 | /* The C locale has no era information, so use the |
848 | normal representation. */ |
849 | if (!recursive (HERE_D_T_FMT)) |
850 | return NULL; |
851 | s.want_xday = 1; |
852 | break; |
853 | case 'C': |
854 | if (s.decided != raw) |
855 | { |
856 | if (s.era_cnt >= 0) |
857 | { |
858 | era = _nl_select_era_entry (cnt: s.era_cnt HELPER_LOCALE_ARG); |
859 | if (era != NULL && match_string (era->era_name, rp)) |
860 | { |
861 | s.decided = loc; |
862 | break; |
863 | } |
864 | else |
865 | return NULL; |
866 | } |
867 | |
868 | num_eras = _NL_CURRENT_WORD (LC_TIME, |
869 | _NL_TIME_ERA_NUM_ENTRIES); |
870 | for (s.era_cnt = 0; s.era_cnt < (int) num_eras; |
871 | ++s.era_cnt, rp = rp_backup) |
872 | { |
873 | era = _nl_select_era_entry (cnt: s.era_cnt |
874 | HELPER_LOCALE_ARG); |
875 | if (era != NULL && match_string (era->era_name, rp)) |
876 | { |
877 | s.decided = loc; |
878 | break; |
879 | } |
880 | } |
881 | if (s.era_cnt != (int) num_eras) |
882 | break; |
883 | |
884 | s.era_cnt = -1; |
885 | if (s.decided == loc) |
886 | return NULL; |
887 | |
888 | s.decided = raw; |
889 | } |
890 | /* The C locale has no era information, so use the |
891 | normal representation. */ |
892 | goto match_century; |
893 | case 'y': |
894 | if (s.decided != raw) |
895 | { |
896 | get_number(0, 9999, 4); |
897 | tm->tm_year = val; |
898 | s.want_era = 1; |
899 | s.want_xday = 1; |
900 | s.want_century = 1; |
901 | |
902 | if (s.era_cnt >= 0) |
903 | { |
904 | assert (s.decided == loc); |
905 | |
906 | era = _nl_select_era_entry (cnt: s.era_cnt HELPER_LOCALE_ARG); |
907 | bool match = false; |
908 | if (era != NULL) |
909 | { |
910 | int delta = ((tm->tm_year - era->offset) |
911 | * era->absolute_direction); |
912 | /* The difference between two sets of years |
913 | does not include the final year itself, |
914 | therefore add 1 to the difference to |
915 | account for that final year. */ |
916 | match = (delta >= 0 |
917 | && delta < (((int64_t) era->stop_date[0] |
918 | - (int64_t) era->start_date[0]) |
919 | * era->absolute_direction |
920 | + 1)); |
921 | } |
922 | if (! match) |
923 | return NULL; |
924 | |
925 | break; |
926 | } |
927 | |
928 | num_eras = _NL_CURRENT_WORD (LC_TIME, |
929 | _NL_TIME_ERA_NUM_ENTRIES); |
930 | for (s.era_cnt = 0; s.era_cnt < (int) num_eras; ++s.era_cnt) |
931 | { |
932 | era = _nl_select_era_entry (cnt: s.era_cnt |
933 | HELPER_LOCALE_ARG); |
934 | if (era != NULL) |
935 | { |
936 | int delta = ((tm->tm_year - era->offset) |
937 | * era->absolute_direction); |
938 | /* See comment above about year difference + 1. */ |
939 | if (delta >= 0 |
940 | && delta < (((int64_t) era->stop_date[0] |
941 | - (int64_t) era->start_date[0]) |
942 | * era->absolute_direction |
943 | + 1)) |
944 | { |
945 | s.decided = loc; |
946 | break; |
947 | } |
948 | } |
949 | } |
950 | if (s.era_cnt != (int) num_eras) |
951 | break; |
952 | |
953 | s.era_cnt = -1; |
954 | if (s.decided == loc) |
955 | return NULL; |
956 | |
957 | s.decided = raw; |
958 | } |
959 | |
960 | goto match_year_in_century; |
961 | case 'Y': |
962 | if (s.decided != raw) |
963 | { |
964 | num_eras = _NL_CURRENT_WORD (LC_TIME, |
965 | _NL_TIME_ERA_NUM_ENTRIES); |
966 | for (s.era_cnt = 0; s.era_cnt < (int) num_eras; |
967 | ++s.era_cnt, rp = rp_backup) |
968 | { |
969 | era = _nl_select_era_entry (cnt: s.era_cnt HELPER_LOCALE_ARG); |
970 | if (era != NULL && recursive (era->era_format)) |
971 | break; |
972 | } |
973 | if (s.era_cnt == (int) num_eras) |
974 | { |
975 | s.era_cnt = -1; |
976 | if (s.decided == loc) |
977 | return NULL; |
978 | else |
979 | rp = rp_backup; |
980 | } |
981 | else |
982 | { |
983 | s.decided = loc; |
984 | break; |
985 | } |
986 | |
987 | s.decided = raw; |
988 | } |
989 | get_number (0, 9999, 4); |
990 | tm->tm_year = val - 1900; |
991 | s.want_century = 0; |
992 | s.want_xday = 1; |
993 | break; |
994 | case 'x': |
995 | if (s.decided != raw) |
996 | { |
997 | const char *fmt = _NL_CURRENT (LC_TIME, ERA_D_FMT); |
998 | |
999 | if (*fmt == '\0') |
1000 | fmt = _NL_CURRENT (LC_TIME, D_FMT); |
1001 | |
1002 | if (!recursive (fmt)) |
1003 | { |
1004 | if (s.decided == loc) |
1005 | return NULL; |
1006 | else |
1007 | rp = rp_backup; |
1008 | } |
1009 | else |
1010 | { |
1011 | if (strcmp (fmt, HERE_D_FMT)) |
1012 | s.decided = loc; |
1013 | break; |
1014 | } |
1015 | s.decided = raw; |
1016 | } |
1017 | if (!recursive (HERE_D_FMT)) |
1018 | return NULL; |
1019 | break; |
1020 | case 'X': |
1021 | if (s.decided != raw) |
1022 | { |
1023 | const char *fmt = _NL_CURRENT (LC_TIME, ERA_T_FMT); |
1024 | |
1025 | if (*fmt == '\0') |
1026 | fmt = _NL_CURRENT (LC_TIME, T_FMT); |
1027 | |
1028 | if (!recursive (fmt)) |
1029 | { |
1030 | if (s.decided == loc) |
1031 | return NULL; |
1032 | else |
1033 | rp = rp_backup; |
1034 | } |
1035 | else |
1036 | { |
1037 | if (strcmp (fmt, HERE_T_FMT)) |
1038 | s.decided = loc; |
1039 | break; |
1040 | } |
1041 | s.decided = raw; |
1042 | } |
1043 | if (!recursive (HERE_T_FMT)) |
1044 | return NULL; |
1045 | break; |
1046 | default: |
1047 | return NULL; |
1048 | } |
1049 | break; |
1050 | #else |
1051 | /* We have no information about the era format. Just use |
1052 | the normal format. */ |
1053 | if (*fmt != 'c' && *fmt != 'C' && *fmt != 'y' && *fmt != 'Y' |
1054 | && *fmt != 'x' && *fmt != 'X') |
1055 | /* This is an illegal format. */ |
1056 | return NULL; |
1057 | |
1058 | goto start_over; |
1059 | #endif |
1060 | case 'O': |
1061 | switch (*fmt++) |
1062 | { |
1063 | case 'b': |
1064 | case 'B': |
1065 | case 'h': |
1066 | /* Match month name. Reprocess as plain 'B'. */ |
1067 | fmt--; |
1068 | goto start_over; |
1069 | case 'd': |
1070 | case 'e': |
1071 | /* Match day of month using alternate numeric symbols. */ |
1072 | get_alt_number (1, 31, 2); |
1073 | tm->tm_mday = val; |
1074 | s.have_mday = 1; |
1075 | s.want_xday = 1; |
1076 | break; |
1077 | case 'H': |
1078 | /* Match hour in 24-hour clock using alternate numeric |
1079 | symbols. */ |
1080 | get_alt_number (0, 23, 2); |
1081 | tm->tm_hour = val; |
1082 | s.have_I = 0; |
1083 | break; |
1084 | case 'I': |
1085 | /* Match hour in 12-hour clock using alternate numeric |
1086 | symbols. */ |
1087 | get_alt_number (1, 12, 2); |
1088 | tm->tm_hour = val % 12; |
1089 | s.have_I = 1; |
1090 | break; |
1091 | case 'm': |
1092 | /* Match month using alternate numeric symbols. */ |
1093 | get_alt_number (1, 12, 2); |
1094 | tm->tm_mon = val - 1; |
1095 | s.have_mon = 1; |
1096 | s.want_xday = 1; |
1097 | break; |
1098 | case 'M': |
1099 | /* Match minutes using alternate numeric symbols. */ |
1100 | get_alt_number (0, 59, 2); |
1101 | tm->tm_min = val; |
1102 | break; |
1103 | case 'S': |
1104 | /* Match seconds using alternate numeric symbols. */ |
1105 | get_alt_number (0, 61, 2); |
1106 | tm->tm_sec = val; |
1107 | break; |
1108 | case 'U': |
1109 | get_alt_number (0, 53, 2); |
1110 | s.week_no = val; |
1111 | s.have_uweek = 1; |
1112 | break; |
1113 | case 'W': |
1114 | get_alt_number (0, 53, 2); |
1115 | s.week_no = val; |
1116 | s.have_wweek = 1; |
1117 | break; |
1118 | case 'V': |
1119 | get_alt_number (0, 53, 2); |
1120 | /* XXX This cannot determine any field in TM without |
1121 | further information. */ |
1122 | break; |
1123 | case 'w': |
1124 | /* Match number of weekday using alternate numeric symbols. */ |
1125 | get_alt_number (0, 6, 1); |
1126 | tm->tm_wday = val; |
1127 | s.have_wday = 1; |
1128 | break; |
1129 | case 'y': |
1130 | /* Match year within century using alternate numeric symbols. */ |
1131 | get_alt_number (0, 99, 2); |
1132 | tm->tm_year = val >= 69 ? val : val + 100; |
1133 | s.want_xday = 1; |
1134 | break; |
1135 | default: |
1136 | return NULL; |
1137 | } |
1138 | break; |
1139 | default: |
1140 | return NULL; |
1141 | } |
1142 | } |
1143 | |
1144 | if (statep != NULL) |
1145 | { |
1146 | /* Recursive invocation, returning success, so |
1147 | update parent's struct tm and state. */ |
1148 | *(struct __strptime_state *) statep = s; |
1149 | *tmp = tmb; |
1150 | return (char *) rp; |
1151 | } |
1152 | |
1153 | if (s.have_I && s.is_pm) |
1154 | tm->tm_hour += 12; |
1155 | |
1156 | if (s.century != -1) |
1157 | { |
1158 | if (s.want_century) |
1159 | tm->tm_year = tm->tm_year % 100 + (s.century - 19) * 100; |
1160 | else |
1161 | /* Only the century, but not the year. Strange, but so be it. */ |
1162 | tm->tm_year = (s.century - 19) * 100; |
1163 | } |
1164 | |
1165 | if (s.era_cnt != -1) |
1166 | { |
1167 | era = _nl_select_era_entry (cnt: s.era_cnt HELPER_LOCALE_ARG); |
1168 | if (era == NULL) |
1169 | return NULL; |
1170 | if (s.want_era) |
1171 | tm->tm_year = (era->start_date[0] |
1172 | + ((tm->tm_year - era->offset) |
1173 | * era->absolute_direction)); |
1174 | else |
1175 | /* Era start year assumed. */ |
1176 | tm->tm_year = era->start_date[0]; |
1177 | } |
1178 | else |
1179 | if (s.want_era) |
1180 | { |
1181 | /* No era found but we have seen an E modifier. Rectify some |
1182 | values. */ |
1183 | if (s.want_century && s.century == -1 && tm->tm_year < 69) |
1184 | tm->tm_year += 100; |
1185 | } |
1186 | |
1187 | if (s.want_xday && !s.have_wday) |
1188 | { |
1189 | if ( !(s.have_mon && s.have_mday) && s.have_yday) |
1190 | { |
1191 | /* We don't have tm_mon and/or tm_mday, compute them. */ |
1192 | int t_mon = 0; |
1193 | while (__mon_yday[__isleap(1900 + tm->tm_year)][t_mon] <= tm->tm_yday) |
1194 | t_mon++; |
1195 | if (!s.have_mon) |
1196 | tm->tm_mon = t_mon - 1; |
1197 | if (!s.have_mday) |
1198 | tm->tm_mday = |
1199 | (tm->tm_yday |
1200 | - __mon_yday[__isleap(1900 + tm->tm_year)][t_mon - 1] + 1); |
1201 | s.have_mon = 1; |
1202 | s.have_mday = 1; |
1203 | } |
1204 | /* Don't crash in day_of_the_week if tm_mon is uninitialized. */ |
1205 | if (s.have_mon || (unsigned) tm->tm_mon <= 11) |
1206 | day_of_the_week (tm); |
1207 | } |
1208 | |
1209 | if (s.want_xday && !s.have_yday && (s.have_mon || (unsigned) tm->tm_mon <= 11)) |
1210 | day_of_the_year (tm); |
1211 | |
1212 | if ((s.have_uweek || s.have_wweek) && s.have_wday) |
1213 | { |
1214 | int save_wday = tm->tm_wday; |
1215 | int save_mday = tm->tm_mday; |
1216 | int save_mon = tm->tm_mon; |
1217 | int w_offset = s.have_uweek ? 0 : 1; |
1218 | |
1219 | tm->tm_mday = 1; |
1220 | tm->tm_mon = 0; |
1221 | day_of_the_week (tm); |
1222 | if (s.have_mday) |
1223 | tm->tm_mday = save_mday; |
1224 | if (s.have_mon) |
1225 | tm->tm_mon = save_mon; |
1226 | |
1227 | if (!s.have_yday) |
1228 | tm->tm_yday = ((7 - (tm->tm_wday - w_offset)) % 7 |
1229 | + (s.week_no - 1) * 7 |
1230 | + (save_wday - w_offset + 7) % 7); |
1231 | |
1232 | if (!s.have_mday || !s.have_mon) |
1233 | { |
1234 | int t_mon = 0; |
1235 | while (__mon_yday[__isleap(1900 + tm->tm_year)][t_mon] |
1236 | <= tm->tm_yday) |
1237 | t_mon++; |
1238 | if (!s.have_mon) |
1239 | tm->tm_mon = t_mon - 1; |
1240 | if (!s.have_mday) |
1241 | tm->tm_mday = |
1242 | (tm->tm_yday |
1243 | - __mon_yday[__isleap(1900 + tm->tm_year)][t_mon - 1] + 1); |
1244 | } |
1245 | |
1246 | tm->tm_wday = save_wday; |
1247 | } |
1248 | |
1249 | return (char *) rp; |
1250 | } |
1251 | |
1252 | |
1253 | char * |
1254 | strptime (const char *buf, const char *format, struct tm *tm LOCALE_PARAM) |
1255 | { |
1256 | return __strptime_internal (rp: buf, fmt: format, tmp: tm, NULL LOCALE_ARG); |
1257 | } |
1258 | |
1259 | #ifdef _LIBC |
1260 | weak_alias (__strptime_l, strptime_l) |
1261 | #endif |
1262 | |