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 | #ifdef _LIBC |
23 | # define USE_IN_EXTENDED_LOCALE_MODEL 1 |
24 | # define HAVE_LIMITS_H 1 |
25 | # define HAVE_MBLEN 1 |
26 | # define HAVE_MBRLEN 1 |
27 | # define HAVE_STRUCT_ERA_ENTRY 1 |
28 | # define HAVE_TM_GMTOFF 1 |
29 | # define HAVE_TM_ZONE 1 |
30 | # define HAVE_TZNAME 1 |
31 | # define HAVE_TZSET 1 |
32 | # define HAVE_STRFTIME 0 |
33 | # define MULTIBYTE_IS_FORMAT_SAFE 1 |
34 | # define 1 |
35 | # include "../locale/localeinfo.h" |
36 | #endif |
37 | |
38 | #if defined emacs && !defined HAVE_BCOPY |
39 | # define HAVE_MEMCPY 1 |
40 | #endif |
41 | |
42 | #include <ctype.h> |
43 | #include <sys/types.h> /* Some systems define `time_t' here. */ |
44 | |
45 | #ifdef TIME_WITH_SYS_TIME |
46 | # include <sys/time.h> |
47 | # include <time.h> |
48 | #else |
49 | # ifdef HAVE_SYS_TIME_H |
50 | # include <sys/time.h> |
51 | # else |
52 | # include <time.h> |
53 | # endif |
54 | #endif |
55 | #if HAVE_TZNAME |
56 | extern char *tzname[]; |
57 | #endif |
58 | |
59 | /* Do multibyte processing if multibytes are supported, unless |
60 | multibyte sequences are safe in formats. Multibyte sequences are |
61 | safe if they cannot contain byte sequences that look like format |
62 | conversion specifications. The GNU C Library uses UTF8 multibyte |
63 | encoding, which is safe for formats, but strftime.c can be used |
64 | with other C libraries that use unsafe encodings. */ |
65 | #define DO_MULTIBYTE (HAVE_MBLEN && ! MULTIBYTE_IS_FORMAT_SAFE) |
66 | |
67 | #if DO_MULTIBYTE |
68 | # if HAVE_MBRLEN |
69 | # include <wchar.h> |
70 | # else |
71 | /* Simulate mbrlen with mblen as best we can. */ |
72 | # define mbstate_t int |
73 | # define mbrlen(s, n, ps) mblen (s, n) |
74 | # define mbsinit(ps) (*(ps) == 0) |
75 | # endif |
76 | static const mbstate_t mbstate_zero; |
77 | #endif |
78 | |
79 | #if HAVE_LIMITS_H |
80 | # include <limits.h> |
81 | #endif |
82 | |
83 | #if STDC_HEADERS |
84 | # include <stddef.h> |
85 | # include <stdlib.h> |
86 | # include <string.h> |
87 | # include <stdbool.h> |
88 | #else |
89 | # ifndef HAVE_MEMCPY |
90 | # define memcpy(d, s, n) bcopy ((s), (d), (n)) |
91 | # endif |
92 | #endif |
93 | |
94 | #ifdef COMPILE_WIDE |
95 | # include <endian.h> |
96 | # define CHAR_T wchar_t |
97 | # define UCHAR_T unsigned int |
98 | # define L_(Str) L##Str |
99 | # define NLW(Sym) _NL_W##Sym |
100 | |
101 | # define MEMCPY(d, s, n) __wmemcpy (d, s, n) |
102 | # define STRLEN(s) __wcslen (s) |
103 | |
104 | #else |
105 | # define CHAR_T char |
106 | # define UCHAR_T unsigned char |
107 | # define L_(Str) Str |
108 | # define NLW(Sym) Sym |
109 | # define ABALTMON_1 _NL_ABALTMON_1 |
110 | |
111 | # if !defined STDC_HEADERS && !defined HAVE_MEMCPY |
112 | # define MEMCPY(d, s, n) bcopy ((s), (d), (n)) |
113 | # else |
114 | # define MEMCPY(d, s, n) memcpy ((d), (s), (n)) |
115 | # endif |
116 | # define STRLEN(s) strlen (s) |
117 | |
118 | # ifdef _LIBC |
119 | # define MEMPCPY(d, s, n) __mempcpy (d, s, n) |
120 | # else |
121 | # ifndef HAVE_MEMPCPY |
122 | # define MEMPCPY(d, s, n) ((void *) ((char *) memcpy (d, s, n) + (n))) |
123 | # endif |
124 | # endif |
125 | #endif |
126 | |
127 | #ifndef PTR |
128 | # define PTR void * |
129 | #endif |
130 | |
131 | #ifndef CHAR_BIT |
132 | # define CHAR_BIT 8 |
133 | #endif |
134 | |
135 | #ifndef NULL |
136 | # define NULL 0 |
137 | #endif |
138 | |
139 | #define TYPE_SIGNED(t) ((t) -1 < 0) |
140 | |
141 | /* Bound on length of the string representing an integer value of type t. |
142 | Subtract one for the sign bit if t is signed; |
143 | 302 / 1000 is log10 (2) rounded up; |
144 | add one for integer division truncation; |
145 | add one more for a minus sign if t is signed. */ |
146 | #define INT_STRLEN_BOUND(t) \ |
147 | ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 + 1 + TYPE_SIGNED (t)) |
148 | |
149 | #define TM_YEAR_BASE 1900 |
150 | |
151 | #ifndef __isleap |
152 | /* Nonzero if YEAR is a leap year (every 4 years, |
153 | except every 100th isn't, and every 400th is). */ |
154 | # define __isleap(year) \ |
155 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) |
156 | #endif |
157 | |
158 | |
159 | #ifdef _LIBC |
160 | # define tzname __tzname |
161 | # define tzset __tzset |
162 | |
163 | # define time_t __time64_t |
164 | # define __gmtime_r(t, tp) __gmtime64_r (t, tp) |
165 | # define mktime(tp) __mktime64 (tp) |
166 | #endif |
167 | |
168 | #if !HAVE_TM_GMTOFF |
169 | /* Portable standalone applications should supply a "time_r.h" that |
170 | declares a POSIX-compliant localtime_r, for the benefit of older |
171 | implementations that lack localtime_r or have a nonstandard one. |
172 | Similarly for gmtime_r. See the gnulib time_r module for one way |
173 | to implement this. */ |
174 | # include "time_r.h" |
175 | # undef __gmtime_r |
176 | # undef __localtime_r |
177 | # define __gmtime_r gmtime_r |
178 | # define __localtime_r localtime_r |
179 | #endif |
180 | |
181 | |
182 | #if !defined memset && !defined HAVE_MEMSET && !defined _LIBC |
183 | /* Some systems lack the `memset' function and we don't want to |
184 | introduce additional dependencies. */ |
185 | /* The SGI compiler reportedly barfs on the trailing null |
186 | if we use a string constant as the initializer. 28 June 1997, rms. */ |
187 | static const CHAR_T spaces[16] = /* " " */ |
188 | { |
189 | L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '), |
190 | L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' ') |
191 | }; |
192 | static const CHAR_T zeroes[16] = /* "0000000000000000" */ |
193 | { |
194 | L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'), |
195 | L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0') |
196 | }; |
197 | |
198 | # define memset_space(P, Len) \ |
199 | do { \ |
200 | int _len = (Len); \ |
201 | \ |
202 | do \ |
203 | { \ |
204 | int _this = _len > 16 ? 16 : _len; \ |
205 | (P) = MEMPCPY ((P), spaces, _this * sizeof (CHAR_T)); \ |
206 | _len -= _this; \ |
207 | } \ |
208 | while (_len > 0); \ |
209 | } while (0) |
210 | |
211 | # define memset_zero(P, Len) \ |
212 | do { \ |
213 | int _len = (Len); \ |
214 | \ |
215 | do \ |
216 | { \ |
217 | int _this = _len > 16 ? 16 : _len; \ |
218 | (P) = MEMPCPY ((P), zeroes, _this * sizeof (CHAR_T)); \ |
219 | _len -= _this; \ |
220 | } \ |
221 | while (_len > 0); \ |
222 | } while (0) |
223 | #else |
224 | # ifdef COMPILE_WIDE |
225 | # define memset_space(P, Len) (wmemset ((P), L' ', (Len)), (P) += (Len)) |
226 | # define memset_zero(P, Len) (wmemset ((P), L'0', (Len)), (P) += (Len)) |
227 | # else |
228 | # define memset_space(P, Len) (memset ((P), ' ', (Len)), (P) += (Len)) |
229 | # define memset_zero(P, Len) (memset ((P), '0', (Len)), (P) += (Len)) |
230 | # endif |
231 | #endif |
232 | |
233 | #define add(n, f) \ |
234 | do \ |
235 | { \ |
236 | int _n = (n); \ |
237 | int _delta = width - _n; \ |
238 | int _incr = _n + (_delta > 0 ? _delta : 0); \ |
239 | if ((size_t) _incr >= maxsize - i) \ |
240 | return 0; \ |
241 | if (p) \ |
242 | { \ |
243 | if (_delta > 0) \ |
244 | { \ |
245 | if (pad == L_('0')) \ |
246 | memset_zero (p, _delta); \ |
247 | else \ |
248 | memset_space (p, _delta); \ |
249 | } \ |
250 | f; \ |
251 | p += _n; \ |
252 | } \ |
253 | i += _incr; \ |
254 | } while (0) |
255 | |
256 | #define cpy(n, s) \ |
257 | add ((n), \ |
258 | if (to_lowcase) \ |
259 | memcpy_lowcase (p, (s), _n LOCALE_ARG); \ |
260 | else if (to_uppcase) \ |
261 | memcpy_uppcase (p, (s), _n LOCALE_ARG); \ |
262 | else \ |
263 | MEMCPY ((PTR) p, (const PTR) (s), _n)) |
264 | |
265 | #ifdef COMPILE_WIDE |
266 | # ifndef USE_IN_EXTENDED_LOCALE_MODEL |
267 | # undef __mbsrtowcs_l |
268 | # define __mbsrtowcs_l(d, s, l, st, loc) __mbsrtowcs (d, s, l, st) |
269 | # endif |
270 | # define widen(os, ws, l) \ |
271 | { \ |
272 | mbstate_t __st; \ |
273 | const char *__s = os; \ |
274 | memset (&__st, '\0', sizeof (__st)); \ |
275 | l = __mbsrtowcs_l (NULL, &__s, 0, &__st, loc); \ |
276 | ws = alloca ((l + 1) * sizeof (wchar_t)); \ |
277 | (void) __mbsrtowcs_l (ws, &__s, l, &__st, loc); \ |
278 | } |
279 | #endif |
280 | |
281 | |
282 | #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL |
283 | /* We use this code also for the extended locale handling where the |
284 | function gets as an additional argument the locale which has to be |
285 | used. To access the values we have to redefine the _NL_CURRENT |
286 | macro. */ |
287 | # define strftime __strftime_l |
288 | # define wcsftime __wcsftime_l |
289 | # undef _NL_CURRENT |
290 | # define _NL_CURRENT(category, item) \ |
291 | (current->values[_NL_ITEM_INDEX (item)].string) |
292 | # define LOCALE_PARAM , locale_t loc |
293 | # define LOCALE_ARG , loc |
294 | # define HELPER_LOCALE_ARG , current |
295 | #else |
296 | # define LOCALE_PARAM |
297 | # define LOCALE_ARG |
298 | # ifdef _LIBC |
299 | # define HELPER_LOCALE_ARG , _NL_CURRENT_DATA (LC_TIME) |
300 | # else |
301 | # define HELPER_LOCALE_ARG |
302 | # endif |
303 | #endif |
304 | |
305 | #ifdef COMPILE_WIDE |
306 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL |
307 | # define TOUPPER(Ch, L) __towupper_l (Ch, L) |
308 | # define TOLOWER(Ch, L) __towlower_l (Ch, L) |
309 | # else |
310 | # define TOUPPER(Ch, L) towupper (Ch) |
311 | # define TOLOWER(Ch, L) towlower (Ch) |
312 | # endif |
313 | #else |
314 | # ifdef _LIBC |
315 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL |
316 | # define TOUPPER(Ch, L) __toupper_l (Ch, L) |
317 | # define TOLOWER(Ch, L) __tolower_l (Ch, L) |
318 | # else |
319 | # define TOUPPER(Ch, L) toupper (Ch) |
320 | # define TOLOWER(Ch, L) tolower (Ch) |
321 | # endif |
322 | # else |
323 | # define TOUPPER(Ch, L) (islower (Ch) ? toupper (Ch) : (Ch)) |
324 | # define TOLOWER(Ch, L) (isupper (Ch) ? tolower (Ch) : (Ch)) |
325 | # endif |
326 | #endif |
327 | /* We don't use `isdigit' here since the locale dependent |
328 | interpretation is not what we want here. We only need to accept |
329 | the arabic digits in the ASCII range. One day there is perhaps a |
330 | more reliable way to accept other sets of digits. */ |
331 | #define ISDIGIT(Ch) ((unsigned int) (Ch) - L_('0') <= 9) |
332 | |
333 | static CHAR_T *memcpy_lowcase (CHAR_T *dest, const CHAR_T *src, |
334 | size_t len LOCALE_PARAM) __THROW; |
335 | |
336 | static CHAR_T * |
337 | memcpy_lowcase (CHAR_T *dest, const CHAR_T *src, size_t len LOCALE_PARAM) |
338 | { |
339 | while (len-- > 0) |
340 | dest[len] = TOLOWER ((UCHAR_T) src[len], loc); |
341 | return dest; |
342 | } |
343 | |
344 | static CHAR_T *memcpy_uppcase (CHAR_T *dest, const CHAR_T *src, |
345 | size_t len LOCALE_PARAM) __THROW; |
346 | |
347 | static CHAR_T * |
348 | memcpy_uppcase (CHAR_T *dest, const CHAR_T *src, size_t len LOCALE_PARAM) |
349 | { |
350 | while (len-- > 0) |
351 | dest[len] = TOUPPER ((UCHAR_T) src[len], loc); |
352 | return dest; |
353 | } |
354 | |
355 | |
356 | #if ! HAVE_TM_GMTOFF |
357 | /* Yield the difference between *A and *B, |
358 | measured in seconds, ignoring leap seconds. */ |
359 | # define tm_diff ftime_tm_diff |
360 | static int tm_diff (const struct tm *, const struct tm *) __THROW; |
361 | static int |
362 | tm_diff (const struct tm *a, const struct tm *b) |
363 | { |
364 | /* Compute intervening leap days correctly even if year is negative. |
365 | Take care to avoid int overflow in leap day calculations, |
366 | but it's OK to assume that A and B are close to each other. */ |
367 | int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3); |
368 | int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3); |
369 | int a100 = a4 / 25 - (a4 % 25 < 0); |
370 | int b100 = b4 / 25 - (b4 % 25 < 0); |
371 | int a400 = a100 >> 2; |
372 | int b400 = b100 >> 2; |
373 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); |
374 | int years = a->tm_year - b->tm_year; |
375 | int days = (365 * years + intervening_leap_days |
376 | + (a->tm_yday - b->tm_yday)); |
377 | return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) |
378 | + (a->tm_min - b->tm_min)) |
379 | + (a->tm_sec - b->tm_sec)); |
380 | } |
381 | #endif /* ! HAVE_TM_GMTOFF */ |
382 | |
383 | |
384 | |
385 | /* The number of days from the first day of the first ISO week of this |
386 | year to the year day YDAY with week day WDAY. ISO weeks start on |
387 | Monday; the first ISO week has the year's first Thursday. YDAY may |
388 | be as small as YDAY_MINIMUM. */ |
389 | #define ISO_WEEK_START_WDAY 1 /* Monday */ |
390 | #define ISO_WEEK1_WDAY 4 /* Thursday */ |
391 | #define YDAY_MINIMUM (-366) |
392 | static int iso_week_days (int, int) __THROW; |
393 | #ifdef __GNUC__ |
394 | __inline__ |
395 | #endif |
396 | static int |
397 | iso_week_days (int yday, int wday) |
398 | { |
399 | /* Add enough to the first operand of % to make it nonnegative. */ |
400 | int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7; |
401 | return (yday |
402 | - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7 |
403 | + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY); |
404 | } |
405 | |
406 | |
407 | #if !(defined _NL_CURRENT || HAVE_STRFTIME) |
408 | static CHAR_T const weekday_name[][10] = |
409 | { |
410 | L_("Sunday" ), L_("Monday" ), L_("Tuesday" ), L_("Wednesday" ), |
411 | L_("Thursday" ), L_("Friday" ), L_("Saturday" ) |
412 | }; |
413 | static CHAR_T const month_name[][10] = |
414 | { |
415 | L_("January" ), L_("February" ), L_("March" ), L_("April" ), L_("May" ), |
416 | L_("June" ), L_("July" ), L_("August" ), L_("September" ), L_("October" ), |
417 | L_("November" ), L_("December" ) |
418 | }; |
419 | #endif |
420 | |
421 | |
422 | #ifdef emacs |
423 | # define my_strftime emacs_strftimeu |
424 | # define ut_argument , ut |
425 | # define ut_argument_spec , int ut |
426 | #else |
427 | # ifdef COMPILE_WIDE |
428 | # define my_strftime wcsftime |
429 | # define nl_get_alt_digit _nl_get_walt_digit |
430 | # else |
431 | # define my_strftime strftime |
432 | # define nl_get_alt_digit _nl_get_alt_digit |
433 | # endif |
434 | # define ut_argument |
435 | # define ut_argument_spec |
436 | /* We don't have this information in general. */ |
437 | # define ut 0 |
438 | #endif |
439 | |
440 | static size_t __strftime_internal (CHAR_T *, size_t, const CHAR_T *, |
441 | const struct tm *, int, bool * |
442 | ut_argument_spec |
443 | LOCALE_PARAM) __THROW; |
444 | |
445 | /* Write information from TP into S according to the format |
446 | string FORMAT, writing no more that MAXSIZE characters |
447 | (including the terminating '\0') and returning number of |
448 | characters written. If S is NULL, nothing will be written |
449 | anywhere, so to determine how many characters would be |
450 | written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */ |
451 | |
452 | size_t |
453 | my_strftime (CHAR_T *s, size_t maxsize, const CHAR_T *format, |
454 | const struct tm *tp ut_argument_spec LOCALE_PARAM) |
455 | { |
456 | #if !defined _LIBC && HAVE_TZNAME && HAVE_TZSET |
457 | /* Solaris 2.5 tzset sometimes modifies the storage returned by localtime. |
458 | Work around this bug by copying *tp before it might be munged. */ |
459 | struct tm tmcopy; |
460 | tmcopy = *tp; |
461 | tp = &tmcopy; |
462 | #endif |
463 | bool tzset_called = false; |
464 | return __strftime_internal (s, maxsize, format, tp, 0, &tzset_called |
465 | ut_argument LOCALE_ARG); |
466 | } |
467 | #ifdef _LIBC |
468 | libc_hidden_def (my_strftime) |
469 | #endif |
470 | |
471 | static size_t |
472 | __strftime_internal (CHAR_T *s, size_t maxsize, const CHAR_T *format, |
473 | const struct tm *tp, int yr_spec, bool *tzset_called |
474 | ut_argument_spec LOCALE_PARAM) |
475 | { |
476 | #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL |
477 | struct __locale_data *const current = loc->__locales[LC_TIME]; |
478 | #endif |
479 | |
480 | int hour12 = tp->tm_hour; |
481 | #ifdef _NL_CURRENT |
482 | /* We cannot make the following values variables since we must delay |
483 | the evaluation of these values until really needed since some |
484 | expressions might not be valid in every situation. The `struct tm' |
485 | might be generated by a strptime() call that initialized |
486 | only a few elements. Dereference the pointers only if the format |
487 | requires this. Then it is ok to fail if the pointers are invalid. */ |
488 | # define a_wkday \ |
489 | ((const CHAR_T *) (tp->tm_wday < 0 || tp->tm_wday > 6 \ |
490 | ? "?" : _NL_CURRENT (LC_TIME, NLW(ABDAY_1) + tp->tm_wday))) |
491 | # define f_wkday \ |
492 | ((const CHAR_T *) (tp->tm_wday < 0 || tp->tm_wday > 6 \ |
493 | ? "?" : _NL_CURRENT (LC_TIME, NLW(DAY_1) + tp->tm_wday))) |
494 | # define a_month \ |
495 | ((const CHAR_T *) (tp->tm_mon < 0 || tp->tm_mon > 11 \ |
496 | ? "?" : _NL_CURRENT (LC_TIME, NLW(ABMON_1) + tp->tm_mon))) |
497 | # define f_month \ |
498 | ((const CHAR_T *) (tp->tm_mon < 0 || tp->tm_mon > 11 \ |
499 | ? "?" : _NL_CURRENT (LC_TIME, NLW(MON_1) + tp->tm_mon))) |
500 | # define a_altmonth \ |
501 | ((const CHAR_T *) (tp->tm_mon < 0 || tp->tm_mon > 11 \ |
502 | ? "?" : _NL_CURRENT (LC_TIME, NLW(ABALTMON_1) + tp->tm_mon))) |
503 | # define f_altmonth \ |
504 | ((const CHAR_T *) (tp->tm_mon < 0 || tp->tm_mon > 11 \ |
505 | ? "?" : _NL_CURRENT (LC_TIME, NLW(ALTMON_1) + tp->tm_mon))) |
506 | # define ampm \ |
507 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, tp->tm_hour > 11 \ |
508 | ? NLW(PM_STR) : NLW(AM_STR))) |
509 | |
510 | # define aw_len STRLEN (a_wkday) |
511 | # define am_len STRLEN (a_month) |
512 | # define aam_len STRLEN (a_altmonth) |
513 | # define ap_len STRLEN (ampm) |
514 | #else |
515 | # if !HAVE_STRFTIME |
516 | # define f_wkday (tp->tm_wday < 0 || tp->tm_wday > 6 \ |
517 | ? "?" : weekday_name[tp->tm_wday]) |
518 | # define f_month (tp->tm_mon < 0 || tp->tm_mon > 11 \ |
519 | ? "?" : month_name[tp->tm_mon]) |
520 | # define a_wkday f_wkday |
521 | # define a_month f_month |
522 | # define a_altmonth a_month |
523 | # define f_altmonth f_month |
524 | # define ampm (L_("AMPM") + 2 * (tp->tm_hour > 11)) |
525 | |
526 | size_t aw_len = 3; |
527 | size_t am_len = 3; |
528 | size_t aam_len = 3; |
529 | size_t ap_len = 2; |
530 | # endif |
531 | #endif |
532 | const char *zone; |
533 | size_t i = 0; |
534 | CHAR_T *p = s; |
535 | const CHAR_T *f; |
536 | #if DO_MULTIBYTE && !defined COMPILE_WIDE |
537 | const char *format_end = NULL; |
538 | #endif |
539 | |
540 | zone = NULL; |
541 | #if HAVE_TM_ZONE |
542 | /* The POSIX test suite assumes that setting |
543 | the environment variable TZ to a new value before calling strftime() |
544 | will influence the result (the %Z format) even if the information in |
545 | TP is computed with a totally different time zone. |
546 | This is bogus: though POSIX allows bad behavior like this, |
547 | POSIX does not require it. Do the right thing instead. */ |
548 | zone = (const char *) tp->tm_zone; |
549 | #endif |
550 | #if HAVE_TZNAME |
551 | if (ut) |
552 | { |
553 | if (! (zone && *zone)) |
554 | zone = "GMT" ; |
555 | } |
556 | #endif |
557 | |
558 | if (hour12 > 12) |
559 | hour12 -= 12; |
560 | else |
561 | if (hour12 == 0) |
562 | hour12 = 12; |
563 | |
564 | for (f = format; *f != '\0'; ++f) |
565 | { |
566 | int pad = 0; /* Padding for number ('-', '_', or 0). */ |
567 | int modifier; /* Field modifier ('E', 'O', or 0). */ |
568 | int digits; /* Max digits for numeric format. */ |
569 | int number_value; /* Numeric value to be printed. */ |
570 | int negative_number; /* 1 if the number is negative. */ |
571 | const CHAR_T *subfmt; |
572 | CHAR_T *bufp; |
573 | CHAR_T buf[1 + (sizeof (int) < sizeof (time_t) |
574 | ? INT_STRLEN_BOUND (time_t) |
575 | : INT_STRLEN_BOUND (int))]; |
576 | int width = -1; |
577 | int to_lowcase = 0; |
578 | int to_uppcase = 0; |
579 | int change_case = 0; |
580 | int format_char; |
581 | |
582 | #if DO_MULTIBYTE && !defined COMPILE_WIDE |
583 | switch (*f) |
584 | { |
585 | case L_('%'): |
586 | break; |
587 | |
588 | case L_('\b'): case L_('\t'): case L_('\n'): |
589 | case L_('\v'): case L_('\f'): case L_('\r'): |
590 | case L_(' '): case L_('!'): case L_('"'): case L_('#'): case L_('&'): |
591 | case L_('\''): case L_('('): case L_(')'): case L_('*'): case L_('+'): |
592 | case L_(','): case L_('-'): case L_('.'): case L_('/'): case L_('0'): |
593 | case L_('1'): case L_('2'): case L_('3'): case L_('4'): case L_('5'): |
594 | case L_('6'): case L_('7'): case L_('8'): case L_('9'): case L_(':'): |
595 | case L_(';'): case L_('<'): case L_('='): case L_('>'): case L_('?'): |
596 | case L_('A'): case L_('B'): case L_('C'): case L_('D'): case L_('E'): |
597 | case L_('F'): case L_('G'): case L_('H'): case L_('I'): case L_('J'): |
598 | case L_('K'): case L_('L'): case L_('M'): case L_('N'): case L_('O'): |
599 | case L_('P'): case L_('Q'): case L_('R'): case L_('S'): case L_('T'): |
600 | case L_('U'): case L_('V'): case L_('W'): case L_('X'): case L_('Y'): |
601 | case L_('Z'): case L_('['): case L_('\\'): case L_(']'): case L_('^'): |
602 | case L_('_'): case L_('a'): case L_('b'): case L_('c'): case L_('d'): |
603 | case L_('e'): case L_('f'): case L_('g'): case L_('h'): case L_('i'): |
604 | case L_('j'): case L_('k'): case L_('l'): case L_('m'): case L_('n'): |
605 | case L_('o'): case L_('p'): case L_('q'): case L_('r'): case L_('s'): |
606 | case L_('t'): case L_('u'): case L_('v'): case L_('w'): case L_('x'): |
607 | case L_('y'): case L_('z'): case L_('{'): case L_('|'): case L_('}'): |
608 | case L_('~'): |
609 | /* The C Standard requires these 98 characters (plus '%') to |
610 | be in the basic execution character set. None of these |
611 | characters can start a multibyte sequence, so they need |
612 | not be analyzed further. */ |
613 | add (1, *p = *f); |
614 | continue; |
615 | |
616 | default: |
617 | /* Copy this multibyte sequence until we reach its end, find |
618 | an error, or come back to the initial shift state. */ |
619 | { |
620 | mbstate_t mbstate = mbstate_zero; |
621 | size_t len = 0; |
622 | size_t fsize; |
623 | |
624 | if (! format_end) |
625 | format_end = f + strlen (f) + 1; |
626 | fsize = format_end - f; |
627 | |
628 | do |
629 | { |
630 | size_t bytes = mbrlen (f + len, fsize - len, &mbstate); |
631 | |
632 | if (bytes == 0) |
633 | break; |
634 | |
635 | if (bytes == (size_t) -2) |
636 | { |
637 | len += strlen (f + len); |
638 | break; |
639 | } |
640 | |
641 | if (bytes == (size_t) -1) |
642 | { |
643 | len++; |
644 | break; |
645 | } |
646 | |
647 | len += bytes; |
648 | } |
649 | while (! mbsinit (&mbstate)); |
650 | |
651 | cpy (len, f); |
652 | f += len - 1; |
653 | continue; |
654 | } |
655 | } |
656 | |
657 | #else /* ! DO_MULTIBYTE */ |
658 | |
659 | /* Either multibyte encodings are not supported, they are |
660 | safe for formats, so any non-'%' byte can be copied through, |
661 | or this is the wide character version. */ |
662 | if (*f != L_('%')) |
663 | { |
664 | add (1, *p = *f); |
665 | continue; |
666 | } |
667 | |
668 | #endif /* ! DO_MULTIBYTE */ |
669 | |
670 | /* Check for flags that can modify a format. */ |
671 | while (1) |
672 | { |
673 | switch (*++f) |
674 | { |
675 | /* This influences the number formats. */ |
676 | case L_('_'): |
677 | case L_('-'): |
678 | case L_('0'): |
679 | pad = *f; |
680 | continue; |
681 | |
682 | /* This changes textual output. */ |
683 | case L_('^'): |
684 | to_uppcase = 1; |
685 | continue; |
686 | case L_('#'): |
687 | change_case = 1; |
688 | continue; |
689 | |
690 | default: |
691 | break; |
692 | } |
693 | break; |
694 | } |
695 | |
696 | /* As a GNU extension we allow to specify the field width. */ |
697 | if (ISDIGIT (*f)) |
698 | { |
699 | width = 0; |
700 | do |
701 | { |
702 | if (width > INT_MAX / 10 |
703 | || (width == INT_MAX / 10 && *f - L_('0') > INT_MAX % 10)) |
704 | /* Avoid overflow. */ |
705 | width = INT_MAX; |
706 | else |
707 | { |
708 | width *= 10; |
709 | width += *f - L_('0'); |
710 | } |
711 | ++f; |
712 | } |
713 | while (ISDIGIT (*f)); |
714 | } |
715 | |
716 | /* Check for modifiers. */ |
717 | switch (*f) |
718 | { |
719 | case L_('E'): |
720 | case L_('O'): |
721 | modifier = *f++; |
722 | break; |
723 | |
724 | default: |
725 | modifier = 0; |
726 | break; |
727 | } |
728 | |
729 | /* Now do the specified format. */ |
730 | format_char = *f; |
731 | switch (format_char) |
732 | { |
733 | #define DO_NUMBER(d, v) \ |
734 | do \ |
735 | { \ |
736 | digits = d > width ? d : width; \ |
737 | number_value = v; \ |
738 | goto do_number; \ |
739 | } \ |
740 | while (0) |
741 | #define DO_NUMBER_SPACEPAD(d, v) \ |
742 | do \ |
743 | { \ |
744 | digits = d > width ? d : width; \ |
745 | number_value = v; \ |
746 | goto do_number_spacepad; \ |
747 | } \ |
748 | while (0) |
749 | |
750 | case L_('%'): |
751 | if (modifier != 0) |
752 | goto bad_format; |
753 | add (1, *p = *f); |
754 | break; |
755 | |
756 | case L_('a'): |
757 | if (modifier != 0) |
758 | goto bad_format; |
759 | if (change_case) |
760 | { |
761 | to_uppcase = 1; |
762 | to_lowcase = 0; |
763 | } |
764 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
765 | cpy (aw_len, a_wkday); |
766 | break; |
767 | #else |
768 | goto underlying_strftime; |
769 | #endif |
770 | |
771 | case 'A': |
772 | if (modifier != 0) |
773 | goto bad_format; |
774 | if (change_case) |
775 | { |
776 | to_uppcase = 1; |
777 | to_lowcase = 0; |
778 | } |
779 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
780 | cpy (STRLEN (f_wkday), f_wkday); |
781 | break; |
782 | #else |
783 | goto underlying_strftime; |
784 | #endif |
785 | |
786 | case L_('b'): |
787 | case L_('h'): |
788 | if (change_case) |
789 | { |
790 | to_uppcase = 1; |
791 | to_lowcase = 0; |
792 | } |
793 | if (modifier == L_('E')) |
794 | goto bad_format; |
795 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
796 | if (modifier == L_('O')) |
797 | cpy (aam_len, a_altmonth); |
798 | else |
799 | cpy (am_len, a_month); |
800 | break; |
801 | #else |
802 | goto underlying_strftime; |
803 | #endif |
804 | |
805 | case L_('B'): |
806 | if (modifier == L_('E')) |
807 | goto bad_format; |
808 | if (change_case) |
809 | { |
810 | to_uppcase = 1; |
811 | to_lowcase = 0; |
812 | } |
813 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
814 | if (modifier == L_('O')) |
815 | cpy (STRLEN (f_altmonth), f_altmonth); |
816 | else |
817 | cpy (STRLEN (f_month), f_month); |
818 | break; |
819 | #else |
820 | goto underlying_strftime; |
821 | #endif |
822 | |
823 | case L_('c'): |
824 | if (modifier == L_('O')) |
825 | goto bad_format; |
826 | #ifdef _NL_CURRENT |
827 | if (! (modifier == L_('E') |
828 | && (*(subfmt = |
829 | (const CHAR_T *) _NL_CURRENT (LC_TIME, |
830 | NLW(ERA_D_T_FMT))) |
831 | != '\0'))) |
832 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_T_FMT)); |
833 | #else |
834 | # if HAVE_STRFTIME |
835 | goto underlying_strftime; |
836 | # else |
837 | subfmt = L_("%a %b %e %H:%M:%S %Y" ); |
838 | # endif |
839 | #endif |
840 | |
841 | subformat: |
842 | { |
843 | CHAR_T *old_start = p; |
844 | size_t len = __strftime_internal (NULL, maxsize: (size_t) -1, format: subfmt, |
845 | tp, yr_spec, tzset_called |
846 | ut_argument LOCALE_ARG); |
847 | add (len, __strftime_internal (p, maxsize - i, subfmt, |
848 | tp, yr_spec, tzset_called |
849 | ut_argument LOCALE_ARG)); |
850 | |
851 | if (to_uppcase) |
852 | while (old_start < p) |
853 | { |
854 | *old_start = TOUPPER ((UCHAR_T) *old_start, loc); |
855 | ++old_start; |
856 | } |
857 | } |
858 | break; |
859 | |
860 | #if HAVE_STRFTIME && ! (defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY) |
861 | underlying_strftime: |
862 | { |
863 | /* The relevant information is available only via the |
864 | underlying strftime implementation, so use that. */ |
865 | char ufmt[4]; |
866 | char *u = ufmt; |
867 | char ubuf[1024]; /* enough for any single format in practice */ |
868 | size_t len; |
869 | /* Make sure we're calling the actual underlying strftime. |
870 | In some cases, config.h contains something like |
871 | "#define strftime rpl_strftime". */ |
872 | # ifdef strftime |
873 | # undef strftime |
874 | size_t strftime (); |
875 | # endif |
876 | |
877 | *u++ = '%'; |
878 | if (modifier != 0) |
879 | *u++ = modifier; |
880 | *u++ = format_char; |
881 | *u = '\0'; |
882 | len = strftime (ubuf, sizeof ubuf, ufmt, tp); |
883 | if (len == 0 && ubuf[0] != '\0') |
884 | return 0; |
885 | cpy (len, ubuf); |
886 | } |
887 | break; |
888 | #endif |
889 | |
890 | case L_('C'): |
891 | if (modifier == L_('E')) |
892 | { |
893 | #if HAVE_STRUCT_ERA_ENTRY |
894 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); |
895 | if (era) |
896 | { |
897 | # ifdef COMPILE_WIDE |
898 | size_t len = __wcslen (era->era_wname); |
899 | cpy (len, era->era_wname); |
900 | # else |
901 | size_t len = strlen (era->era_name); |
902 | cpy (len, era->era_name); |
903 | # endif |
904 | break; |
905 | } |
906 | #else |
907 | # if HAVE_STRFTIME |
908 | goto underlying_strftime; |
909 | # endif |
910 | #endif |
911 | } |
912 | |
913 | { |
914 | int year = tp->tm_year + TM_YEAR_BASE; |
915 | DO_NUMBER (1, year / 100 - (year % 100 < 0)); |
916 | } |
917 | |
918 | case L_('x'): |
919 | if (modifier == L_('O')) |
920 | goto bad_format; |
921 | #ifdef _NL_CURRENT |
922 | if (! (modifier == L_('E') |
923 | && (*(subfmt = |
924 | (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ERA_D_FMT))) |
925 | != L_('\0')))) |
926 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_FMT)); |
927 | goto subformat; |
928 | #else |
929 | # if HAVE_STRFTIME |
930 | goto underlying_strftime; |
931 | # else |
932 | /* Fall through. */ |
933 | # endif |
934 | #endif |
935 | case L_('D'): |
936 | if (modifier != 0) |
937 | goto bad_format; |
938 | subfmt = L_("%m/%d/%y" ); |
939 | goto subformat; |
940 | |
941 | case L_('d'): |
942 | if (modifier == L_('E')) |
943 | goto bad_format; |
944 | |
945 | DO_NUMBER (2, tp->tm_mday); |
946 | |
947 | case L_('e'): |
948 | if (modifier == L_('E')) |
949 | goto bad_format; |
950 | |
951 | DO_NUMBER_SPACEPAD (2, tp->tm_mday); |
952 | |
953 | /* All numeric formats set DIGITS and NUMBER_VALUE and then |
954 | jump to one of these two labels. */ |
955 | |
956 | do_number_spacepad: |
957 | /* Force `_' flag unless overwritten by `0' or '-' flag. */ |
958 | if (pad != L_('0') && pad != L_('-')) |
959 | pad = L_('_'); |
960 | |
961 | do_number: |
962 | /* Format the number according to the MODIFIER flag. */ |
963 | |
964 | if (modifier == L_('O') && 0 <= number_value) |
965 | { |
966 | #ifdef _NL_CURRENT |
967 | /* Get the locale specific alternate representation of |
968 | the number NUMBER_VALUE. If none exist NULL is returned. */ |
969 | const CHAR_T *cp = nl_get_alt_digit (number: number_value |
970 | HELPER_LOCALE_ARG); |
971 | |
972 | if (cp != NULL) |
973 | { |
974 | size_t digitlen = STRLEN (cp); |
975 | if (digitlen != 0) |
976 | { |
977 | cpy (digitlen, cp); |
978 | break; |
979 | } |
980 | } |
981 | #else |
982 | # if HAVE_STRFTIME |
983 | goto underlying_strftime; |
984 | # endif |
985 | #endif |
986 | } |
987 | { |
988 | unsigned int u = number_value; |
989 | |
990 | bufp = buf + sizeof (buf) / sizeof (buf[0]); |
991 | negative_number = number_value < 0; |
992 | |
993 | if (negative_number) |
994 | u = -u; |
995 | |
996 | do |
997 | *--bufp = u % 10 + L_('0'); |
998 | while ((u /= 10) != 0); |
999 | } |
1000 | |
1001 | do_number_sign_and_padding: |
1002 | if (negative_number) |
1003 | *--bufp = L_('-'); |
1004 | |
1005 | if (pad != L_('-')) |
1006 | { |
1007 | int padding = digits - (buf + (sizeof (buf) / sizeof (buf[0])) |
1008 | - bufp); |
1009 | |
1010 | if (padding > 0) |
1011 | { |
1012 | if (pad == L_('_')) |
1013 | { |
1014 | if ((size_t) padding >= maxsize - i) |
1015 | return 0; |
1016 | |
1017 | if (p) |
1018 | memset_space (p, padding); |
1019 | i += padding; |
1020 | width = width > padding ? width - padding : 0; |
1021 | } |
1022 | else |
1023 | { |
1024 | if ((size_t) digits >= maxsize - i) |
1025 | return 0; |
1026 | |
1027 | if (negative_number) |
1028 | { |
1029 | ++bufp; |
1030 | |
1031 | if (p) |
1032 | *p++ = L_('-'); |
1033 | ++i; |
1034 | } |
1035 | |
1036 | if (p) |
1037 | memset_zero (p, padding); |
1038 | i += padding; |
1039 | width = 0; |
1040 | } |
1041 | } |
1042 | } |
1043 | |
1044 | cpy (buf + sizeof (buf) / sizeof (buf[0]) - bufp, bufp); |
1045 | break; |
1046 | |
1047 | case L_('F'): |
1048 | if (modifier != 0) |
1049 | goto bad_format; |
1050 | subfmt = L_("%Y-%m-%d" ); |
1051 | goto subformat; |
1052 | |
1053 | case L_('H'): |
1054 | if (modifier == L_('E')) |
1055 | goto bad_format; |
1056 | |
1057 | DO_NUMBER (2, tp->tm_hour); |
1058 | |
1059 | case L_('I'): |
1060 | if (modifier == L_('E')) |
1061 | goto bad_format; |
1062 | |
1063 | DO_NUMBER (2, hour12); |
1064 | |
1065 | case L_('k'): /* GNU extension. */ |
1066 | if (modifier == L_('E')) |
1067 | goto bad_format; |
1068 | |
1069 | DO_NUMBER_SPACEPAD (2, tp->tm_hour); |
1070 | |
1071 | case L_('l'): /* GNU extension. */ |
1072 | if (modifier == L_('E')) |
1073 | goto bad_format; |
1074 | |
1075 | DO_NUMBER_SPACEPAD (2, hour12); |
1076 | |
1077 | case L_('j'): |
1078 | if (modifier == L_('E')) |
1079 | goto bad_format; |
1080 | |
1081 | DO_NUMBER (3, 1 + tp->tm_yday); |
1082 | |
1083 | case L_('M'): |
1084 | if (modifier == L_('E')) |
1085 | goto bad_format; |
1086 | |
1087 | DO_NUMBER (2, tp->tm_min); |
1088 | |
1089 | case L_('m'): |
1090 | if (modifier == L_('E')) |
1091 | goto bad_format; |
1092 | |
1093 | DO_NUMBER (2, tp->tm_mon + 1); |
1094 | |
1095 | case L_('n'): |
1096 | add (1, *p = L_('\n')); |
1097 | break; |
1098 | |
1099 | case L_('P'): |
1100 | to_lowcase = 1; |
1101 | #if !defined _NL_CURRENT && HAVE_STRFTIME |
1102 | format_char = L_('p'); |
1103 | #endif |
1104 | /* FALLTHROUGH */ |
1105 | |
1106 | case L_('p'): |
1107 | if (change_case) |
1108 | { |
1109 | to_uppcase = 0; |
1110 | to_lowcase = 1; |
1111 | } |
1112 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
1113 | cpy (ap_len, ampm); |
1114 | break; |
1115 | #else |
1116 | goto underlying_strftime; |
1117 | #endif |
1118 | |
1119 | case L_('R'): |
1120 | subfmt = L_("%H:%M" ); |
1121 | goto subformat; |
1122 | |
1123 | case L_('r'): |
1124 | #if !defined _NL_CURRENT && HAVE_STRFTIME |
1125 | goto underlying_strftime; |
1126 | #else |
1127 | # ifdef _NL_CURRENT |
1128 | if (*(subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, |
1129 | NLW(T_FMT_AMPM))) |
1130 | == L_('\0')) |
1131 | # endif |
1132 | subfmt = L_("%I:%M:%S %p" ); |
1133 | goto subformat; |
1134 | #endif |
1135 | |
1136 | case L_('S'): |
1137 | if (modifier == L_('E')) |
1138 | goto bad_format; |
1139 | |
1140 | DO_NUMBER (2, tp->tm_sec); |
1141 | |
1142 | case L_('s'): /* GNU extension. */ |
1143 | { |
1144 | struct tm ltm; |
1145 | time_t t; |
1146 | |
1147 | ltm = *tp; |
1148 | t = mktime (<m); |
1149 | |
1150 | /* Generate string value for T using time_t arithmetic; |
1151 | this works even if sizeof (long) < sizeof (time_t). */ |
1152 | |
1153 | bufp = buf + sizeof (buf) / sizeof (buf[0]); |
1154 | negative_number = t < 0; |
1155 | |
1156 | do |
1157 | { |
1158 | int d = t % 10; |
1159 | t /= 10; |
1160 | |
1161 | if (negative_number) |
1162 | { |
1163 | d = -d; |
1164 | |
1165 | /* Adjust if division truncates to minus infinity. */ |
1166 | if (0 < -1 % 10 && d < 0) |
1167 | { |
1168 | t++; |
1169 | d += 10; |
1170 | } |
1171 | } |
1172 | |
1173 | *--bufp = d + L_('0'); |
1174 | } |
1175 | while (t != 0); |
1176 | |
1177 | digits = 1; |
1178 | goto do_number_sign_and_padding; |
1179 | } |
1180 | |
1181 | case L_('X'): |
1182 | if (modifier == L_('O')) |
1183 | goto bad_format; |
1184 | #ifdef _NL_CURRENT |
1185 | if (! (modifier == L_('E') |
1186 | && (*(subfmt = |
1187 | (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ERA_T_FMT))) |
1188 | != L_('\0')))) |
1189 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(T_FMT)); |
1190 | goto subformat; |
1191 | #else |
1192 | # if HAVE_STRFTIME |
1193 | goto underlying_strftime; |
1194 | # else |
1195 | /* Fall through. */ |
1196 | # endif |
1197 | #endif |
1198 | case L_('T'): |
1199 | subfmt = L_("%H:%M:%S" ); |
1200 | goto subformat; |
1201 | |
1202 | case L_('t'): |
1203 | add (1, *p = L_('\t')); |
1204 | break; |
1205 | |
1206 | case L_('u'): |
1207 | DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1); |
1208 | |
1209 | case L_('U'): |
1210 | if (modifier == L_('E')) |
1211 | goto bad_format; |
1212 | |
1213 | DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7); |
1214 | |
1215 | case L_('V'): |
1216 | case L_('g'): |
1217 | case L_('G'): |
1218 | if (modifier == L_('E')) |
1219 | goto bad_format; |
1220 | { |
1221 | int year = tp->tm_year + TM_YEAR_BASE; |
1222 | int days = iso_week_days (yday: tp->tm_yday, wday: tp->tm_wday); |
1223 | |
1224 | if (days < 0) |
1225 | { |
1226 | /* This ISO week belongs to the previous year. */ |
1227 | year--; |
1228 | days = iso_week_days (yday: tp->tm_yday + (365 + __isleap (year)), |
1229 | wday: tp->tm_wday); |
1230 | } |
1231 | else |
1232 | { |
1233 | int d = iso_week_days (yday: tp->tm_yday - (365 + __isleap (year)), |
1234 | wday: tp->tm_wday); |
1235 | if (0 <= d) |
1236 | { |
1237 | /* This ISO week belongs to the next year. */ |
1238 | year++; |
1239 | days = d; |
1240 | } |
1241 | } |
1242 | |
1243 | switch (*f) |
1244 | { |
1245 | case L_('g'): |
1246 | DO_NUMBER (2, (year % 100 + 100) % 100); |
1247 | |
1248 | case L_('G'): |
1249 | DO_NUMBER (1, year); |
1250 | |
1251 | default: |
1252 | DO_NUMBER (2, days / 7 + 1); |
1253 | } |
1254 | } |
1255 | |
1256 | case L_('W'): |
1257 | if (modifier == L_('E')) |
1258 | goto bad_format; |
1259 | |
1260 | DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7); |
1261 | |
1262 | case L_('w'): |
1263 | if (modifier == L_('E')) |
1264 | goto bad_format; |
1265 | |
1266 | DO_NUMBER (1, tp->tm_wday); |
1267 | |
1268 | case L_('Y'): |
1269 | if (modifier == L_('E')) |
1270 | { |
1271 | #if HAVE_STRUCT_ERA_ENTRY |
1272 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); |
1273 | if (era) |
1274 | { |
1275 | # ifdef COMPILE_WIDE |
1276 | subfmt = era->era_wformat; |
1277 | # else |
1278 | subfmt = era->era_format; |
1279 | # endif |
1280 | if (pad != 0) |
1281 | yr_spec = pad; |
1282 | goto subformat; |
1283 | } |
1284 | #else |
1285 | # if HAVE_STRFTIME |
1286 | goto underlying_strftime; |
1287 | # endif |
1288 | #endif |
1289 | } |
1290 | if (modifier == L_('O')) |
1291 | goto bad_format; |
1292 | else |
1293 | DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE); |
1294 | |
1295 | case L_('y'): |
1296 | if (modifier == L_('E')) |
1297 | { |
1298 | #if HAVE_STRUCT_ERA_ENTRY |
1299 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); |
1300 | if (era) |
1301 | { |
1302 | int delta = tp->tm_year - era->start_date[0]; |
1303 | if (yr_spec != 0) |
1304 | pad = yr_spec; |
1305 | DO_NUMBER (2, (era->offset |
1306 | + delta * era->absolute_direction)); |
1307 | } |
1308 | #else |
1309 | # if HAVE_STRFTIME |
1310 | goto underlying_strftime; |
1311 | # endif |
1312 | #endif |
1313 | } |
1314 | DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100); |
1315 | |
1316 | case L_('Z'): |
1317 | if (change_case) |
1318 | { |
1319 | to_uppcase = 0; |
1320 | to_lowcase = 1; |
1321 | } |
1322 | |
1323 | #if HAVE_TZNAME |
1324 | /* The tzset() call might have changed the value. */ |
1325 | if (!(zone && *zone) && tp->tm_isdst >= 0) |
1326 | { |
1327 | /* POSIX.1 requires that local time zone information is used as |
1328 | though strftime called tzset. */ |
1329 | # if HAVE_TZSET |
1330 | if (!*tzset_called) |
1331 | { |
1332 | tzset (); |
1333 | *tzset_called = true; |
1334 | } |
1335 | # endif |
1336 | zone = tp->tm_isdst <= 1 ? tzname[tp->tm_isdst] : "?" ; |
1337 | } |
1338 | #endif |
1339 | if (! zone) |
1340 | zone = "" ; |
1341 | |
1342 | #ifdef COMPILE_WIDE |
1343 | { |
1344 | /* The zone string is always given in multibyte form. We have |
1345 | to transform it first. */ |
1346 | wchar_t *wczone; |
1347 | size_t len; |
1348 | widen (zone, wczone, len); |
1349 | cpy (len, wczone); |
1350 | } |
1351 | #else |
1352 | cpy (strlen (zone), zone); |
1353 | #endif |
1354 | break; |
1355 | |
1356 | case L_('z'): |
1357 | if (tp->tm_isdst < 0) |
1358 | break; |
1359 | |
1360 | { |
1361 | int diff; |
1362 | #if HAVE_TM_GMTOFF |
1363 | diff = tp->tm_gmtoff; |
1364 | #else |
1365 | if (ut) |
1366 | diff = 0; |
1367 | else |
1368 | { |
1369 | struct tm gtm; |
1370 | struct tm ltm; |
1371 | time_t lt; |
1372 | |
1373 | /* POSIX.1 requires that local time zone information is used as |
1374 | though strftime called tzset. */ |
1375 | # if HAVE_TZSET |
1376 | if (!*tzset_called) |
1377 | { |
1378 | tzset (); |
1379 | *tzset_called = true; |
1380 | } |
1381 | # endif |
1382 | |
1383 | ltm = *tp; |
1384 | lt = mktime (<m); |
1385 | |
1386 | if (lt == (time_t) -1) |
1387 | { |
1388 | /* mktime returns -1 for errors, but -1 is also a |
1389 | valid time_t value. Check whether an error really |
1390 | occurred. */ |
1391 | struct tm tm; |
1392 | |
1393 | if (! __localtime_r (<, &tm) |
1394 | || ((ltm.tm_sec ^ tm.tm_sec) |
1395 | | (ltm.tm_min ^ tm.tm_min) |
1396 | | (ltm.tm_hour ^ tm.tm_hour) |
1397 | | (ltm.tm_mday ^ tm.tm_mday) |
1398 | | (ltm.tm_mon ^ tm.tm_mon) |
1399 | | (ltm.tm_year ^ tm.tm_year))) |
1400 | break; |
1401 | } |
1402 | |
1403 | if (! __gmtime_r (<, >m)) |
1404 | break; |
1405 | |
1406 | diff = tm_diff (<m, >m); |
1407 | } |
1408 | #endif |
1409 | |
1410 | if (diff < 0) |
1411 | { |
1412 | add (1, *p = L_('-')); |
1413 | diff = -diff; |
1414 | } |
1415 | else |
1416 | add (1, *p = L_('+')); |
1417 | |
1418 | diff /= 60; |
1419 | DO_NUMBER (4, (diff / 60) * 100 + diff % 60); |
1420 | } |
1421 | |
1422 | case L_('\0'): /* GNU extension: % at end of format. */ |
1423 | --f; |
1424 | /* Fall through. */ |
1425 | default: |
1426 | /* Unknown format; output the format, including the '%', |
1427 | since this is most likely the right thing to do if a |
1428 | multibyte string has been misparsed. */ |
1429 | bad_format: |
1430 | { |
1431 | int flen; |
1432 | for (flen = 1; f[1 - flen] != L_('%'); flen++) |
1433 | continue; |
1434 | cpy (flen, &f[1 - flen]); |
1435 | } |
1436 | break; |
1437 | } |
1438 | } |
1439 | |
1440 | if (p && maxsize != 0) |
1441 | *p = L_('\0'); |
1442 | return i; |
1443 | } |
1444 | |
1445 | |
1446 | #ifdef emacs |
1447 | /* For Emacs we have a separate interface which corresponds to the normal |
1448 | strftime function and does not have the extra information whether the |
1449 | TP arguments comes from a `gmtime' call or not. */ |
1450 | size_t |
1451 | emacs_strftime (char *s, size_t maxsize, const char *format, |
1452 | const struct tm *tp) |
1453 | { |
1454 | return my_strftime (s, maxsize, format, tp, 0); |
1455 | } |
1456 | #endif |
1457 | |
1458 | #if defined _LIBC && !defined COMPILE_WIDE |
1459 | weak_alias (__strftime_l, strftime_l) |
1460 | #endif |
1461 | |