1 | /* Copyright (C) 2002-2017 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 | <http://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 | |
110 | # if !defined STDC_HEADERS && !defined HAVE_MEMCPY |
111 | # define MEMCPY(d, s, n) bcopy ((s), (d), (n)) |
112 | # else |
113 | # define MEMCPY(d, s, n) memcpy ((d), (s), (n)) |
114 | # endif |
115 | # define STRLEN(s) strlen (s) |
116 | |
117 | # ifdef _LIBC |
118 | # define MEMPCPY(d, s, n) __mempcpy (d, s, n) |
119 | # else |
120 | # ifndef HAVE_MEMPCPY |
121 | # define MEMPCPY(d, s, n) ((void *) ((char *) memcpy (d, s, n) + (n))) |
122 | # endif |
123 | # endif |
124 | #endif |
125 | |
126 | #ifndef PTR |
127 | # define PTR void * |
128 | #endif |
129 | |
130 | #ifndef CHAR_BIT |
131 | # define CHAR_BIT 8 |
132 | #endif |
133 | |
134 | #ifndef NULL |
135 | # define NULL 0 |
136 | #endif |
137 | |
138 | #define TYPE_SIGNED(t) ((t) -1 < 0) |
139 | |
140 | /* Bound on length of the string representing an integer value of type t. |
141 | Subtract one for the sign bit if t is signed; |
142 | 302 / 1000 is log10 (2) rounded up; |
143 | add one for integer division truncation; |
144 | add one more for a minus sign if t is signed. */ |
145 | #define INT_STRLEN_BOUND(t) \ |
146 | ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 + 1 + TYPE_SIGNED (t)) |
147 | |
148 | #define TM_YEAR_BASE 1900 |
149 | |
150 | #ifndef __isleap |
151 | /* Nonzero if YEAR is a leap year (every 4 years, |
152 | except every 100th isn't, and every 400th is). */ |
153 | # define __isleap(year) \ |
154 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) |
155 | #endif |
156 | |
157 | |
158 | #ifdef _LIBC |
159 | # define tzname __tzname |
160 | # define tzset __tzset |
161 | #endif |
162 | |
163 | #if !HAVE_TM_GMTOFF |
164 | /* Portable standalone applications should supply a "time_r.h" that |
165 | declares a POSIX-compliant localtime_r, for the benefit of older |
166 | implementations that lack localtime_r or have a nonstandard one. |
167 | Similarly for gmtime_r. See the gnulib time_r module for one way |
168 | to implement this. */ |
169 | # include "time_r.h" |
170 | # undef __gmtime_r |
171 | # undef __localtime_r |
172 | # define __gmtime_r gmtime_r |
173 | # define __localtime_r localtime_r |
174 | #endif |
175 | |
176 | |
177 | #if !defined memset && !defined HAVE_MEMSET && !defined _LIBC |
178 | /* Some systems lack the `memset' function and we don't want to |
179 | introduce additional dependencies. */ |
180 | /* The SGI compiler reportedly barfs on the trailing null |
181 | if we use a string constant as the initializer. 28 June 1997, rms. */ |
182 | static const CHAR_T spaces[16] = /* " " */ |
183 | { |
184 | L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '), |
185 | L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' ') |
186 | }; |
187 | static const CHAR_T zeroes[16] = /* "0000000000000000" */ |
188 | { |
189 | L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'), |
190 | L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0') |
191 | }; |
192 | |
193 | # define memset_space(P, Len) \ |
194 | do { \ |
195 | int _len = (Len); \ |
196 | \ |
197 | do \ |
198 | { \ |
199 | int _this = _len > 16 ? 16 : _len; \ |
200 | (P) = MEMPCPY ((P), spaces, _this * sizeof (CHAR_T)); \ |
201 | _len -= _this; \ |
202 | } \ |
203 | while (_len > 0); \ |
204 | } while (0) |
205 | |
206 | # define memset_zero(P, Len) \ |
207 | do { \ |
208 | int _len = (Len); \ |
209 | \ |
210 | do \ |
211 | { \ |
212 | int _this = _len > 16 ? 16 : _len; \ |
213 | (P) = MEMPCPY ((P), zeroes, _this * sizeof (CHAR_T)); \ |
214 | _len -= _this; \ |
215 | } \ |
216 | while (_len > 0); \ |
217 | } while (0) |
218 | #else |
219 | # ifdef COMPILE_WIDE |
220 | # define memset_space(P, Len) (wmemset ((P), L' ', (Len)), (P) += (Len)) |
221 | # define memset_zero(P, Len) (wmemset ((P), L'0', (Len)), (P) += (Len)) |
222 | # else |
223 | # define memset_space(P, Len) (memset ((P), ' ', (Len)), (P) += (Len)) |
224 | # define memset_zero(P, Len) (memset ((P), '0', (Len)), (P) += (Len)) |
225 | # endif |
226 | #endif |
227 | |
228 | #define add(n, f) \ |
229 | do \ |
230 | { \ |
231 | int _n = (n); \ |
232 | int _delta = width - _n; \ |
233 | int _incr = _n + (_delta > 0 ? _delta : 0); \ |
234 | if ((size_t) _incr >= maxsize - i) \ |
235 | return 0; \ |
236 | if (p) \ |
237 | { \ |
238 | if (_delta > 0) \ |
239 | { \ |
240 | if (pad == L_('0')) \ |
241 | memset_zero (p, _delta); \ |
242 | else \ |
243 | memset_space (p, _delta); \ |
244 | } \ |
245 | f; \ |
246 | p += _n; \ |
247 | } \ |
248 | i += _incr; \ |
249 | } while (0) |
250 | |
251 | #define cpy(n, s) \ |
252 | add ((n), \ |
253 | if (to_lowcase) \ |
254 | memcpy_lowcase (p, (s), _n LOCALE_ARG); \ |
255 | else if (to_uppcase) \ |
256 | memcpy_uppcase (p, (s), _n LOCALE_ARG); \ |
257 | else \ |
258 | MEMCPY ((PTR) p, (const PTR) (s), _n)) |
259 | |
260 | #ifdef COMPILE_WIDE |
261 | # ifndef USE_IN_EXTENDED_LOCALE_MODEL |
262 | # undef __mbsrtowcs_l |
263 | # define __mbsrtowcs_l(d, s, l, st, loc) __mbsrtowcs (d, s, l, st) |
264 | # endif |
265 | # define widen(os, ws, l) \ |
266 | { \ |
267 | mbstate_t __st; \ |
268 | const char *__s = os; \ |
269 | memset (&__st, '\0', sizeof (__st)); \ |
270 | l = __mbsrtowcs_l (NULL, &__s, 0, &__st, loc); \ |
271 | ws = alloca ((l + 1) * sizeof (wchar_t)); \ |
272 | (void) __mbsrtowcs_l (ws, &__s, l, &__st, loc); \ |
273 | } |
274 | #endif |
275 | |
276 | |
277 | #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL |
278 | /* We use this code also for the extended locale handling where the |
279 | function gets as an additional argument the locale which has to be |
280 | used. To access the values we have to redefine the _NL_CURRENT |
281 | macro. */ |
282 | # define strftime __strftime_l |
283 | # define wcsftime __wcsftime_l |
284 | # undef _NL_CURRENT |
285 | # define _NL_CURRENT(category, item) \ |
286 | (current->values[_NL_ITEM_INDEX (item)].string) |
287 | # define LOCALE_PARAM , locale_t loc |
288 | # define LOCALE_ARG , loc |
289 | # define HELPER_LOCALE_ARG , current |
290 | #else |
291 | # define LOCALE_PARAM |
292 | # define LOCALE_ARG |
293 | # ifdef _LIBC |
294 | # define HELPER_LOCALE_ARG , _NL_CURRENT_DATA (LC_TIME) |
295 | # else |
296 | # define HELPER_LOCALE_ARG |
297 | # endif |
298 | #endif |
299 | |
300 | #ifdef COMPILE_WIDE |
301 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL |
302 | # define TOUPPER(Ch, L) __towupper_l (Ch, L) |
303 | # define TOLOWER(Ch, L) __towlower_l (Ch, L) |
304 | # else |
305 | # define TOUPPER(Ch, L) towupper (Ch) |
306 | # define TOLOWER(Ch, L) towlower (Ch) |
307 | # endif |
308 | #else |
309 | # ifdef _LIBC |
310 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL |
311 | # define TOUPPER(Ch, L) __toupper_l (Ch, L) |
312 | # define TOLOWER(Ch, L) __tolower_l (Ch, L) |
313 | # else |
314 | # define TOUPPER(Ch, L) toupper (Ch) |
315 | # define TOLOWER(Ch, L) tolower (Ch) |
316 | # endif |
317 | # else |
318 | # define TOUPPER(Ch, L) (islower (Ch) ? toupper (Ch) : (Ch)) |
319 | # define TOLOWER(Ch, L) (isupper (Ch) ? tolower (Ch) : (Ch)) |
320 | # endif |
321 | #endif |
322 | /* We don't use `isdigit' here since the locale dependent |
323 | interpretation is not what we want here. We only need to accept |
324 | the arabic digits in the ASCII range. One day there is perhaps a |
325 | more reliable way to accept other sets of digits. */ |
326 | #define ISDIGIT(Ch) ((unsigned int) (Ch) - L_('0') <= 9) |
327 | |
328 | static CHAR_T *memcpy_lowcase (CHAR_T *dest, const CHAR_T *src, |
329 | size_t len LOCALE_PARAM) __THROW; |
330 | |
331 | static CHAR_T * |
332 | memcpy_lowcase (CHAR_T *dest, const CHAR_T *src, size_t len LOCALE_PARAM) |
333 | { |
334 | while (len-- > 0) |
335 | dest[len] = TOLOWER ((UCHAR_T) src[len], loc); |
336 | return dest; |
337 | } |
338 | |
339 | static CHAR_T *memcpy_uppcase (CHAR_T *dest, const CHAR_T *src, |
340 | size_t len LOCALE_PARAM) __THROW; |
341 | |
342 | static CHAR_T * |
343 | memcpy_uppcase (CHAR_T *dest, const CHAR_T *src, size_t len LOCALE_PARAM) |
344 | { |
345 | while (len-- > 0) |
346 | dest[len] = TOUPPER ((UCHAR_T) src[len], loc); |
347 | return dest; |
348 | } |
349 | |
350 | |
351 | #if ! HAVE_TM_GMTOFF |
352 | /* Yield the difference between *A and *B, |
353 | measured in seconds, ignoring leap seconds. */ |
354 | # define tm_diff ftime_tm_diff |
355 | static int tm_diff (const struct tm *, const struct tm *) __THROW; |
356 | static int |
357 | tm_diff (const struct tm *a, const struct tm *b) |
358 | { |
359 | /* Compute intervening leap days correctly even if year is negative. |
360 | Take care to avoid int overflow in leap day calculations, |
361 | but it's OK to assume that A and B are close to each other. */ |
362 | int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3); |
363 | int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3); |
364 | int a100 = a4 / 25 - (a4 % 25 < 0); |
365 | int b100 = b4 / 25 - (b4 % 25 < 0); |
366 | int a400 = a100 >> 2; |
367 | int b400 = b100 >> 2; |
368 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); |
369 | int years = a->tm_year - b->tm_year; |
370 | int days = (365 * years + intervening_leap_days |
371 | + (a->tm_yday - b->tm_yday)); |
372 | return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) |
373 | + (a->tm_min - b->tm_min)) |
374 | + (a->tm_sec - b->tm_sec)); |
375 | } |
376 | #endif /* ! HAVE_TM_GMTOFF */ |
377 | |
378 | |
379 | |
380 | /* The number of days from the first day of the first ISO week of this |
381 | year to the year day YDAY with week day WDAY. ISO weeks start on |
382 | Monday; the first ISO week has the year's first Thursday. YDAY may |
383 | be as small as YDAY_MINIMUM. */ |
384 | #define ISO_WEEK_START_WDAY 1 /* Monday */ |
385 | #define ISO_WEEK1_WDAY 4 /* Thursday */ |
386 | #define YDAY_MINIMUM (-366) |
387 | static int iso_week_days (int, int) __THROW; |
388 | #ifdef __GNUC__ |
389 | __inline__ |
390 | #endif |
391 | static int |
392 | iso_week_days (int yday, int wday) |
393 | { |
394 | /* Add enough to the first operand of % to make it nonnegative. */ |
395 | int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7; |
396 | return (yday |
397 | - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7 |
398 | + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY); |
399 | } |
400 | |
401 | |
402 | #if !(defined _NL_CURRENT || HAVE_STRFTIME) |
403 | static CHAR_T const weekday_name[][10] = |
404 | { |
405 | L_("Sunday" ), L_("Monday" ), L_("Tuesday" ), L_("Wednesday" ), |
406 | L_("Thursday" ), L_("Friday" ), L_("Saturday" ) |
407 | }; |
408 | static CHAR_T const month_name[][10] = |
409 | { |
410 | L_("January" ), L_("February" ), L_("March" ), L_("April" ), L_("May" ), |
411 | L_("June" ), L_("July" ), L_("August" ), L_("September" ), L_("October" ), |
412 | L_("November" ), L_("December" ) |
413 | }; |
414 | #endif |
415 | |
416 | |
417 | #ifdef emacs |
418 | # define my_strftime emacs_strftimeu |
419 | # define ut_argument , ut |
420 | # define ut_argument_spec , int ut |
421 | #else |
422 | # ifdef COMPILE_WIDE |
423 | # define my_strftime wcsftime |
424 | # define nl_get_alt_digit _nl_get_walt_digit |
425 | # else |
426 | # define my_strftime strftime |
427 | # define nl_get_alt_digit _nl_get_alt_digit |
428 | # endif |
429 | # define ut_argument |
430 | # define ut_argument_spec |
431 | /* We don't have this information in general. */ |
432 | # define ut 0 |
433 | #endif |
434 | |
435 | static size_t __strftime_internal (CHAR_T *, size_t, const CHAR_T *, |
436 | const struct tm *, bool * |
437 | ut_argument_spec |
438 | LOCALE_PARAM) __THROW; |
439 | |
440 | /* Write information from TP into S according to the format |
441 | string FORMAT, writing no more that MAXSIZE characters |
442 | (including the terminating '\0') and returning number of |
443 | characters written. If S is NULL, nothing will be written |
444 | anywhere, so to determine how many characters would be |
445 | written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */ |
446 | |
447 | size_t |
448 | my_strftime (CHAR_T *s, size_t maxsize, const CHAR_T *format, |
449 | const struct tm *tp ut_argument_spec LOCALE_PARAM) |
450 | { |
451 | #if !defined _LIBC && HAVE_TZNAME && HAVE_TZSET |
452 | /* Solaris 2.5 tzset sometimes modifies the storage returned by localtime. |
453 | Work around this bug by copying *tp before it might be munged. */ |
454 | struct tm tmcopy; |
455 | tmcopy = *tp; |
456 | tp = &tmcopy; |
457 | #endif |
458 | bool tzset_called = false; |
459 | return __strftime_internal (s, maxsize, format, tp, &tzset_called |
460 | ut_argument LOCALE_ARG); |
461 | } |
462 | #ifdef _LIBC |
463 | libc_hidden_def (my_strftime) |
464 | #endif |
465 | |
466 | static size_t |
467 | __strftime_internal (CHAR_T *s, size_t maxsize, const CHAR_T *format, |
468 | const struct tm *tp, bool *tzset_called |
469 | ut_argument_spec LOCALE_PARAM) |
470 | { |
471 | #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL |
472 | struct __locale_data *const current = loc->__locales[LC_TIME]; |
473 | #endif |
474 | |
475 | int hour12 = tp->tm_hour; |
476 | #ifdef _NL_CURRENT |
477 | /* We cannot make the following values variables since we must delay |
478 | the evaluation of these values until really needed since some |
479 | expressions might not be valid in every situation. The `struct tm' |
480 | might be generated by a strptime() call that initialized |
481 | only a few elements. Dereference the pointers only if the format |
482 | requires this. Then it is ok to fail if the pointers are invalid. */ |
483 | # define a_wkday \ |
484 | ((const CHAR_T *) (tp->tm_wday < 0 || tp->tm_wday > 6 \ |
485 | ? "?" : _NL_CURRENT (LC_TIME, NLW(ABDAY_1) + tp->tm_wday))) |
486 | # define f_wkday \ |
487 | ((const CHAR_T *) (tp->tm_wday < 0 || tp->tm_wday > 6 \ |
488 | ? "?" : _NL_CURRENT (LC_TIME, NLW(DAY_1) + tp->tm_wday))) |
489 | # define a_month \ |
490 | ((const CHAR_T *) (tp->tm_mon < 0 || tp->tm_mon > 11 \ |
491 | ? "?" : _NL_CURRENT (LC_TIME, NLW(ABMON_1) + tp->tm_mon))) |
492 | # define f_month \ |
493 | ((const CHAR_T *) (tp->tm_mon < 0 || tp->tm_mon > 11 \ |
494 | ? "?" : _NL_CURRENT (LC_TIME, NLW(MON_1) + tp->tm_mon))) |
495 | # define ampm \ |
496 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, tp->tm_hour > 11 \ |
497 | ? NLW(PM_STR) : NLW(AM_STR))) |
498 | |
499 | # define aw_len STRLEN (a_wkday) |
500 | # define am_len STRLEN (a_month) |
501 | # define ap_len STRLEN (ampm) |
502 | #else |
503 | # if !HAVE_STRFTIME |
504 | # define f_wkday (tp->tm_wday < 0 || tp->tm_wday > 6 \ |
505 | ? "?" : weekday_name[tp->tm_wday]) |
506 | # define f_month (tp->tm_mon < 0 || tp->tm_mon > 11 \ |
507 | ? "?" : month_name[tp->tm_mon]) |
508 | # define a_wkday f_wkday |
509 | # define a_month f_month |
510 | # define ampm (L_("AMPM") + 2 * (tp->tm_hour > 11)) |
511 | |
512 | size_t aw_len = 3; |
513 | size_t am_len = 3; |
514 | size_t ap_len = 2; |
515 | # endif |
516 | #endif |
517 | const char *zone; |
518 | size_t i = 0; |
519 | CHAR_T *p = s; |
520 | const CHAR_T *f; |
521 | #if DO_MULTIBYTE && !defined COMPILE_WIDE |
522 | const char *format_end = NULL; |
523 | #endif |
524 | |
525 | zone = NULL; |
526 | #if HAVE_TM_ZONE |
527 | /* The POSIX test suite assumes that setting |
528 | the environment variable TZ to a new value before calling strftime() |
529 | will influence the result (the %Z format) even if the information in |
530 | TP is computed with a totally different time zone. |
531 | This is bogus: though POSIX allows bad behavior like this, |
532 | POSIX does not require it. Do the right thing instead. */ |
533 | zone = (const char *) tp->tm_zone; |
534 | #endif |
535 | #if HAVE_TZNAME |
536 | if (ut) |
537 | { |
538 | if (! (zone && *zone)) |
539 | zone = "GMT" ; |
540 | } |
541 | #endif |
542 | |
543 | if (hour12 > 12) |
544 | hour12 -= 12; |
545 | else |
546 | if (hour12 == 0) |
547 | hour12 = 12; |
548 | |
549 | for (f = format; *f != '\0'; ++f) |
550 | { |
551 | int pad = 0; /* Padding for number ('-', '_', or 0). */ |
552 | int modifier; /* Field modifier ('E', 'O', or 0). */ |
553 | int digits; /* Max digits for numeric format. */ |
554 | int number_value; /* Numeric value to be printed. */ |
555 | int negative_number; /* 1 if the number is negative. */ |
556 | const CHAR_T *subfmt; |
557 | CHAR_T *bufp; |
558 | CHAR_T buf[1 + (sizeof (int) < sizeof (time_t) |
559 | ? INT_STRLEN_BOUND (time_t) |
560 | : INT_STRLEN_BOUND (int))]; |
561 | int width = -1; |
562 | int to_lowcase = 0; |
563 | int to_uppcase = 0; |
564 | int change_case = 0; |
565 | int format_char; |
566 | |
567 | #if DO_MULTIBYTE && !defined COMPILE_WIDE |
568 | switch (*f) |
569 | { |
570 | case L_('%'): |
571 | break; |
572 | |
573 | case L_('\b'): case L_('\t'): case L_('\n'): |
574 | case L_('\v'): case L_('\f'): case L_('\r'): |
575 | case L_(' '): case L_('!'): case L_('"'): case L_('#'): case L_('&'): |
576 | case L_('\''): case L_('('): case L_(')'): case L_('*'): case L_('+'): |
577 | case L_(','): case L_('-'): case L_('.'): case L_('/'): case L_('0'): |
578 | case L_('1'): case L_('2'): case L_('3'): case L_('4'): case L_('5'): |
579 | case L_('6'): case L_('7'): case L_('8'): case L_('9'): case L_(':'): |
580 | case L_(';'): case L_('<'): case L_('='): case L_('>'): case L_('?'): |
581 | case L_('A'): case L_('B'): case L_('C'): case L_('D'): case L_('E'): |
582 | case L_('F'): case L_('G'): case L_('H'): case L_('I'): case L_('J'): |
583 | case L_('K'): case L_('L'): case L_('M'): case L_('N'): case L_('O'): |
584 | case L_('P'): case L_('Q'): case L_('R'): case L_('S'): case L_('T'): |
585 | case L_('U'): case L_('V'): case L_('W'): case L_('X'): case L_('Y'): |
586 | case L_('Z'): case L_('['): case L_('\\'): case L_(']'): case L_('^'): |
587 | case L_('_'): case L_('a'): case L_('b'): case L_('c'): case L_('d'): |
588 | case L_('e'): case L_('f'): case L_('g'): case L_('h'): case L_('i'): |
589 | case L_('j'): case L_('k'): case L_('l'): case L_('m'): case L_('n'): |
590 | case L_('o'): case L_('p'): case L_('q'): case L_('r'): case L_('s'): |
591 | case L_('t'): case L_('u'): case L_('v'): case L_('w'): case L_('x'): |
592 | case L_('y'): case L_('z'): case L_('{'): case L_('|'): case L_('}'): |
593 | case L_('~'): |
594 | /* The C Standard requires these 98 characters (plus '%') to |
595 | be in the basic execution character set. None of these |
596 | characters can start a multibyte sequence, so they need |
597 | not be analyzed further. */ |
598 | add (1, *p = *f); |
599 | continue; |
600 | |
601 | default: |
602 | /* Copy this multibyte sequence until we reach its end, find |
603 | an error, or come back to the initial shift state. */ |
604 | { |
605 | mbstate_t mbstate = mbstate_zero; |
606 | size_t len = 0; |
607 | size_t fsize; |
608 | |
609 | if (! format_end) |
610 | format_end = f + strlen (f) + 1; |
611 | fsize = format_end - f; |
612 | |
613 | do |
614 | { |
615 | size_t bytes = mbrlen (f + len, fsize - len, &mbstate); |
616 | |
617 | if (bytes == 0) |
618 | break; |
619 | |
620 | if (bytes == (size_t) -2) |
621 | { |
622 | len += strlen (f + len); |
623 | break; |
624 | } |
625 | |
626 | if (bytes == (size_t) -1) |
627 | { |
628 | len++; |
629 | break; |
630 | } |
631 | |
632 | len += bytes; |
633 | } |
634 | while (! mbsinit (&mbstate)); |
635 | |
636 | cpy (len, f); |
637 | f += len - 1; |
638 | continue; |
639 | } |
640 | } |
641 | |
642 | #else /* ! DO_MULTIBYTE */ |
643 | |
644 | /* Either multibyte encodings are not supported, they are |
645 | safe for formats, so any non-'%' byte can be copied through, |
646 | or this is the wide character version. */ |
647 | if (*f != L_('%')) |
648 | { |
649 | add (1, *p = *f); |
650 | continue; |
651 | } |
652 | |
653 | #endif /* ! DO_MULTIBYTE */ |
654 | |
655 | /* Check for flags that can modify a format. */ |
656 | while (1) |
657 | { |
658 | switch (*++f) |
659 | { |
660 | /* This influences the number formats. */ |
661 | case L_('_'): |
662 | case L_('-'): |
663 | case L_('0'): |
664 | pad = *f; |
665 | continue; |
666 | |
667 | /* This changes textual output. */ |
668 | case L_('^'): |
669 | to_uppcase = 1; |
670 | continue; |
671 | case L_('#'): |
672 | change_case = 1; |
673 | continue; |
674 | |
675 | default: |
676 | break; |
677 | } |
678 | break; |
679 | } |
680 | |
681 | /* As a GNU extension we allow to specify the field width. */ |
682 | if (ISDIGIT (*f)) |
683 | { |
684 | width = 0; |
685 | do |
686 | { |
687 | if (width > INT_MAX / 10 |
688 | || (width == INT_MAX / 10 && *f - L_('0') > INT_MAX % 10)) |
689 | /* Avoid overflow. */ |
690 | width = INT_MAX; |
691 | else |
692 | { |
693 | width *= 10; |
694 | width += *f - L_('0'); |
695 | } |
696 | ++f; |
697 | } |
698 | while (ISDIGIT (*f)); |
699 | } |
700 | |
701 | /* Check for modifiers. */ |
702 | switch (*f) |
703 | { |
704 | case L_('E'): |
705 | case L_('O'): |
706 | modifier = *f++; |
707 | break; |
708 | |
709 | default: |
710 | modifier = 0; |
711 | break; |
712 | } |
713 | |
714 | /* Now do the specified format. */ |
715 | format_char = *f; |
716 | switch (format_char) |
717 | { |
718 | #define DO_NUMBER(d, v) \ |
719 | do \ |
720 | { \ |
721 | digits = d > width ? d : width; \ |
722 | number_value = v; \ |
723 | goto do_number; \ |
724 | } \ |
725 | while (0) |
726 | #define DO_NUMBER_SPACEPAD(d, v) \ |
727 | do \ |
728 | { \ |
729 | digits = d > width ? d : width; \ |
730 | number_value = v; \ |
731 | goto do_number_spacepad; \ |
732 | } \ |
733 | while (0) |
734 | |
735 | case L_('%'): |
736 | if (modifier != 0) |
737 | goto bad_format; |
738 | add (1, *p = *f); |
739 | break; |
740 | |
741 | case L_('a'): |
742 | if (modifier != 0) |
743 | goto bad_format; |
744 | if (change_case) |
745 | { |
746 | to_uppcase = 1; |
747 | to_lowcase = 0; |
748 | } |
749 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
750 | cpy (aw_len, a_wkday); |
751 | break; |
752 | #else |
753 | goto underlying_strftime; |
754 | #endif |
755 | |
756 | case '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 (STRLEN (f_wkday), f_wkday); |
766 | break; |
767 | #else |
768 | goto underlying_strftime; |
769 | #endif |
770 | |
771 | case L_('b'): |
772 | case L_('h'): |
773 | if (change_case) |
774 | { |
775 | to_uppcase = 1; |
776 | to_lowcase = 0; |
777 | } |
778 | if (modifier != 0) |
779 | goto bad_format; |
780 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
781 | cpy (am_len, a_month); |
782 | break; |
783 | #else |
784 | goto underlying_strftime; |
785 | #endif |
786 | |
787 | case L_('B'): |
788 | if (modifier != 0) |
789 | goto bad_format; |
790 | if (change_case) |
791 | { |
792 | to_uppcase = 1; |
793 | to_lowcase = 0; |
794 | } |
795 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
796 | cpy (STRLEN (f_month), f_month); |
797 | break; |
798 | #else |
799 | goto underlying_strftime; |
800 | #endif |
801 | |
802 | case L_('c'): |
803 | if (modifier == L_('O')) |
804 | goto bad_format; |
805 | #ifdef _NL_CURRENT |
806 | if (! (modifier == 'E' |
807 | && (*(subfmt = |
808 | (const CHAR_T *) _NL_CURRENT (LC_TIME, |
809 | NLW(ERA_D_T_FMT))) |
810 | != '\0'))) |
811 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_T_FMT)); |
812 | #else |
813 | # if HAVE_STRFTIME |
814 | goto underlying_strftime; |
815 | # else |
816 | subfmt = L_("%a %b %e %H:%M:%S %Y" ); |
817 | # endif |
818 | #endif |
819 | |
820 | subformat: |
821 | { |
822 | CHAR_T *old_start = p; |
823 | size_t len = __strftime_internal (NULL, (size_t) -1, subfmt, |
824 | tp, tzset_called ut_argument |
825 | LOCALE_ARG); |
826 | add (len, __strftime_internal (p, maxsize - i, subfmt, |
827 | tp, tzset_called ut_argument |
828 | LOCALE_ARG)); |
829 | |
830 | if (to_uppcase) |
831 | while (old_start < p) |
832 | { |
833 | *old_start = TOUPPER ((UCHAR_T) *old_start, loc); |
834 | ++old_start; |
835 | } |
836 | } |
837 | break; |
838 | |
839 | #if HAVE_STRFTIME && ! (defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY) |
840 | underlying_strftime: |
841 | { |
842 | /* The relevant information is available only via the |
843 | underlying strftime implementation, so use that. */ |
844 | char ufmt[4]; |
845 | char *u = ufmt; |
846 | char ubuf[1024]; /* enough for any single format in practice */ |
847 | size_t len; |
848 | /* Make sure we're calling the actual underlying strftime. |
849 | In some cases, config.h contains something like |
850 | "#define strftime rpl_strftime". */ |
851 | # ifdef strftime |
852 | # undef strftime |
853 | size_t strftime (); |
854 | # endif |
855 | |
856 | *u++ = '%'; |
857 | if (modifier != 0) |
858 | *u++ = modifier; |
859 | *u++ = format_char; |
860 | *u = '\0'; |
861 | len = strftime (ubuf, sizeof ubuf, ufmt, tp); |
862 | if (len == 0 && ubuf[0] != '\0') |
863 | return 0; |
864 | cpy (len, ubuf); |
865 | } |
866 | break; |
867 | #endif |
868 | |
869 | case L_('C'): |
870 | if (modifier == L_('E')) |
871 | { |
872 | #if HAVE_STRUCT_ERA_ENTRY |
873 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); |
874 | if (era) |
875 | { |
876 | # ifdef COMPILE_WIDE |
877 | size_t len = __wcslen (era->era_wname); |
878 | cpy (len, era->era_wname); |
879 | # else |
880 | size_t len = strlen (era->era_name); |
881 | cpy (len, era->era_name); |
882 | # endif |
883 | break; |
884 | } |
885 | #else |
886 | # if HAVE_STRFTIME |
887 | goto underlying_strftime; |
888 | # endif |
889 | #endif |
890 | } |
891 | |
892 | { |
893 | int year = tp->tm_year + TM_YEAR_BASE; |
894 | DO_NUMBER (1, year / 100 - (year % 100 < 0)); |
895 | } |
896 | |
897 | case L_('x'): |
898 | if (modifier == L_('O')) |
899 | goto bad_format; |
900 | #ifdef _NL_CURRENT |
901 | if (! (modifier == L_('E') |
902 | && (*(subfmt = |
903 | (const CHAR_T *)_NL_CURRENT (LC_TIME, NLW(ERA_D_FMT))) |
904 | != L_('\0')))) |
905 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_FMT)); |
906 | goto subformat; |
907 | #else |
908 | # if HAVE_STRFTIME |
909 | goto underlying_strftime; |
910 | # else |
911 | /* Fall through. */ |
912 | # endif |
913 | #endif |
914 | case L_('D'): |
915 | if (modifier != 0) |
916 | goto bad_format; |
917 | subfmt = L_("%m/%d/%y" ); |
918 | goto subformat; |
919 | |
920 | case L_('d'): |
921 | if (modifier == L_('E')) |
922 | goto bad_format; |
923 | |
924 | DO_NUMBER (2, tp->tm_mday); |
925 | |
926 | case L_('e'): |
927 | if (modifier == L_('E')) |
928 | goto bad_format; |
929 | |
930 | DO_NUMBER_SPACEPAD (2, tp->tm_mday); |
931 | |
932 | /* All numeric formats set DIGITS and NUMBER_VALUE and then |
933 | jump to one of these two labels. */ |
934 | |
935 | do_number_spacepad: |
936 | /* Force `_' flag unless overwritten by `0' or '-' flag. */ |
937 | if (pad != L_('0') && pad != L_('-')) |
938 | pad = L_('_'); |
939 | |
940 | do_number: |
941 | /* Format the number according to the MODIFIER flag. */ |
942 | |
943 | if (modifier == L_('O') && 0 <= number_value) |
944 | { |
945 | #ifdef _NL_CURRENT |
946 | /* Get the locale specific alternate representation of |
947 | the number NUMBER_VALUE. If none exist NULL is returned. */ |
948 | const CHAR_T *cp = nl_get_alt_digit (number_value |
949 | HELPER_LOCALE_ARG); |
950 | |
951 | if (cp != NULL) |
952 | { |
953 | size_t digitlen = STRLEN (cp); |
954 | if (digitlen != 0) |
955 | { |
956 | cpy (digitlen, cp); |
957 | break; |
958 | } |
959 | } |
960 | #else |
961 | # if HAVE_STRFTIME |
962 | goto underlying_strftime; |
963 | # endif |
964 | #endif |
965 | } |
966 | { |
967 | unsigned int u = number_value; |
968 | |
969 | bufp = buf + sizeof (buf) / sizeof (buf[0]); |
970 | negative_number = number_value < 0; |
971 | |
972 | if (negative_number) |
973 | u = -u; |
974 | |
975 | do |
976 | *--bufp = u % 10 + L_('0'); |
977 | while ((u /= 10) != 0); |
978 | } |
979 | |
980 | do_number_sign_and_padding: |
981 | if (negative_number) |
982 | *--bufp = L_('-'); |
983 | |
984 | if (pad != L_('-')) |
985 | { |
986 | int padding = digits - (buf + (sizeof (buf) / sizeof (buf[0])) |
987 | - bufp); |
988 | |
989 | if (padding > 0) |
990 | { |
991 | if (pad == L_('_')) |
992 | { |
993 | if ((size_t) padding >= maxsize - i) |
994 | return 0; |
995 | |
996 | if (p) |
997 | memset_space (p, padding); |
998 | i += padding; |
999 | width = width > padding ? width - padding : 0; |
1000 | } |
1001 | else |
1002 | { |
1003 | if ((size_t) digits >= maxsize - i) |
1004 | return 0; |
1005 | |
1006 | if (negative_number) |
1007 | { |
1008 | ++bufp; |
1009 | |
1010 | if (p) |
1011 | *p++ = L_('-'); |
1012 | ++i; |
1013 | } |
1014 | |
1015 | if (p) |
1016 | memset_zero (p, padding); |
1017 | i += padding; |
1018 | width = 0; |
1019 | } |
1020 | } |
1021 | } |
1022 | |
1023 | cpy (buf + sizeof (buf) / sizeof (buf[0]) - bufp, bufp); |
1024 | break; |
1025 | |
1026 | case L_('F'): |
1027 | if (modifier != 0) |
1028 | goto bad_format; |
1029 | subfmt = L_("%Y-%m-%d" ); |
1030 | goto subformat; |
1031 | |
1032 | case L_('H'): |
1033 | if (modifier == L_('E')) |
1034 | goto bad_format; |
1035 | |
1036 | DO_NUMBER (2, tp->tm_hour); |
1037 | |
1038 | case L_('I'): |
1039 | if (modifier == L_('E')) |
1040 | goto bad_format; |
1041 | |
1042 | DO_NUMBER (2, hour12); |
1043 | |
1044 | case L_('k'): /* GNU extension. */ |
1045 | if (modifier == L_('E')) |
1046 | goto bad_format; |
1047 | |
1048 | DO_NUMBER_SPACEPAD (2, tp->tm_hour); |
1049 | |
1050 | case L_('l'): /* GNU extension. */ |
1051 | if (modifier == L_('E')) |
1052 | goto bad_format; |
1053 | |
1054 | DO_NUMBER_SPACEPAD (2, hour12); |
1055 | |
1056 | case L_('j'): |
1057 | if (modifier == L_('E')) |
1058 | goto bad_format; |
1059 | |
1060 | DO_NUMBER (3, 1 + tp->tm_yday); |
1061 | |
1062 | case L_('M'): |
1063 | if (modifier == L_('E')) |
1064 | goto bad_format; |
1065 | |
1066 | DO_NUMBER (2, tp->tm_min); |
1067 | |
1068 | case L_('m'): |
1069 | if (modifier == L_('E')) |
1070 | goto bad_format; |
1071 | |
1072 | DO_NUMBER (2, tp->tm_mon + 1); |
1073 | |
1074 | case L_('n'): |
1075 | add (1, *p = L_('\n')); |
1076 | break; |
1077 | |
1078 | case L_('P'): |
1079 | to_lowcase = 1; |
1080 | #if !defined _NL_CURRENT && HAVE_STRFTIME |
1081 | format_char = L_('p'); |
1082 | #endif |
1083 | /* FALLTHROUGH */ |
1084 | |
1085 | case L_('p'): |
1086 | if (change_case) |
1087 | { |
1088 | to_uppcase = 0; |
1089 | to_lowcase = 1; |
1090 | } |
1091 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
1092 | cpy (ap_len, ampm); |
1093 | break; |
1094 | #else |
1095 | goto underlying_strftime; |
1096 | #endif |
1097 | |
1098 | case L_('R'): |
1099 | subfmt = L_("%H:%M" ); |
1100 | goto subformat; |
1101 | |
1102 | case L_('r'): |
1103 | #if !defined _NL_CURRENT && HAVE_STRFTIME |
1104 | goto underlying_strftime; |
1105 | #else |
1106 | # ifdef _NL_CURRENT |
1107 | if (*(subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, |
1108 | NLW(T_FMT_AMPM))) |
1109 | == L_('\0')) |
1110 | # endif |
1111 | subfmt = L_("%I:%M:%S %p" ); |
1112 | goto subformat; |
1113 | #endif |
1114 | |
1115 | case L_('S'): |
1116 | if (modifier == L_('E')) |
1117 | goto bad_format; |
1118 | |
1119 | DO_NUMBER (2, tp->tm_sec); |
1120 | |
1121 | case L_('s'): /* GNU extension. */ |
1122 | { |
1123 | struct tm ltm; |
1124 | time_t t; |
1125 | |
1126 | ltm = *tp; |
1127 | t = mktime (<m); |
1128 | |
1129 | /* Generate string value for T using time_t arithmetic; |
1130 | this works even if sizeof (long) < sizeof (time_t). */ |
1131 | |
1132 | bufp = buf + sizeof (buf) / sizeof (buf[0]); |
1133 | negative_number = t < 0; |
1134 | |
1135 | do |
1136 | { |
1137 | int d = t % 10; |
1138 | t /= 10; |
1139 | |
1140 | if (negative_number) |
1141 | { |
1142 | d = -d; |
1143 | |
1144 | /* Adjust if division truncates to minus infinity. */ |
1145 | if (0 < -1 % 10 && d < 0) |
1146 | { |
1147 | t++; |
1148 | d += 10; |
1149 | } |
1150 | } |
1151 | |
1152 | *--bufp = d + L_('0'); |
1153 | } |
1154 | while (t != 0); |
1155 | |
1156 | digits = 1; |
1157 | goto do_number_sign_and_padding; |
1158 | } |
1159 | |
1160 | case L_('X'): |
1161 | if (modifier == L_('O')) |
1162 | goto bad_format; |
1163 | #ifdef _NL_CURRENT |
1164 | if (! (modifier == L_('E') |
1165 | && (*(subfmt = |
1166 | (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ERA_T_FMT))) |
1167 | != L_('\0')))) |
1168 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(T_FMT)); |
1169 | goto subformat; |
1170 | #else |
1171 | # if HAVE_STRFTIME |
1172 | goto underlying_strftime; |
1173 | # else |
1174 | /* Fall through. */ |
1175 | # endif |
1176 | #endif |
1177 | case L_('T'): |
1178 | subfmt = L_("%H:%M:%S" ); |
1179 | goto subformat; |
1180 | |
1181 | case L_('t'): |
1182 | add (1, *p = L_('\t')); |
1183 | break; |
1184 | |
1185 | case L_('u'): |
1186 | DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1); |
1187 | |
1188 | case L_('U'): |
1189 | if (modifier == L_('E')) |
1190 | goto bad_format; |
1191 | |
1192 | DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7); |
1193 | |
1194 | case L_('V'): |
1195 | case L_('g'): |
1196 | case L_('G'): |
1197 | if (modifier == L_('E')) |
1198 | goto bad_format; |
1199 | { |
1200 | int year = tp->tm_year + TM_YEAR_BASE; |
1201 | int days = iso_week_days (tp->tm_yday, tp->tm_wday); |
1202 | |
1203 | if (days < 0) |
1204 | { |
1205 | /* This ISO week belongs to the previous year. */ |
1206 | year--; |
1207 | days = iso_week_days (tp->tm_yday + (365 + __isleap (year)), |
1208 | tp->tm_wday); |
1209 | } |
1210 | else |
1211 | { |
1212 | int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)), |
1213 | tp->tm_wday); |
1214 | if (0 <= d) |
1215 | { |
1216 | /* This ISO week belongs to the next year. */ |
1217 | year++; |
1218 | days = d; |
1219 | } |
1220 | } |
1221 | |
1222 | switch (*f) |
1223 | { |
1224 | case L_('g'): |
1225 | DO_NUMBER (2, (year % 100 + 100) % 100); |
1226 | |
1227 | case L_('G'): |
1228 | DO_NUMBER (1, year); |
1229 | |
1230 | default: |
1231 | DO_NUMBER (2, days / 7 + 1); |
1232 | } |
1233 | } |
1234 | |
1235 | case L_('W'): |
1236 | if (modifier == L_('E')) |
1237 | goto bad_format; |
1238 | |
1239 | DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7); |
1240 | |
1241 | case L_('w'): |
1242 | if (modifier == L_('E')) |
1243 | goto bad_format; |
1244 | |
1245 | DO_NUMBER (1, tp->tm_wday); |
1246 | |
1247 | case L_('Y'): |
1248 | if (modifier == 'E') |
1249 | { |
1250 | #if HAVE_STRUCT_ERA_ENTRY |
1251 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); |
1252 | if (era) |
1253 | { |
1254 | # ifdef COMPILE_WIDE |
1255 | subfmt = era->era_wformat; |
1256 | # else |
1257 | subfmt = era->era_format; |
1258 | # endif |
1259 | goto subformat; |
1260 | } |
1261 | #else |
1262 | # if HAVE_STRFTIME |
1263 | goto underlying_strftime; |
1264 | # endif |
1265 | #endif |
1266 | } |
1267 | if (modifier == L_('O')) |
1268 | goto bad_format; |
1269 | else |
1270 | DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE); |
1271 | |
1272 | case L_('y'): |
1273 | if (modifier == L_('E')) |
1274 | { |
1275 | #if HAVE_STRUCT_ERA_ENTRY |
1276 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); |
1277 | if (era) |
1278 | { |
1279 | int delta = tp->tm_year - era->start_date[0]; |
1280 | DO_NUMBER (1, (era->offset |
1281 | + delta * era->absolute_direction)); |
1282 | } |
1283 | #else |
1284 | # if HAVE_STRFTIME |
1285 | goto underlying_strftime; |
1286 | # endif |
1287 | #endif |
1288 | } |
1289 | DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100); |
1290 | |
1291 | case L_('Z'): |
1292 | if (change_case) |
1293 | { |
1294 | to_uppcase = 0; |
1295 | to_lowcase = 1; |
1296 | } |
1297 | |
1298 | #if HAVE_TZNAME |
1299 | /* The tzset() call might have changed the value. */ |
1300 | if (!(zone && *zone) && tp->tm_isdst >= 0) |
1301 | { |
1302 | /* POSIX.1 requires that local time zone information is used as |
1303 | though strftime called tzset. */ |
1304 | # if HAVE_TZSET |
1305 | if (!*tzset_called) |
1306 | { |
1307 | tzset (); |
1308 | *tzset_called = true; |
1309 | } |
1310 | # endif |
1311 | zone = tp->tm_isdst <= 1 ? tzname[tp->tm_isdst] : "?" ; |
1312 | } |
1313 | #endif |
1314 | if (! zone) |
1315 | zone = "" ; |
1316 | |
1317 | #ifdef COMPILE_WIDE |
1318 | { |
1319 | /* The zone string is always given in multibyte form. We have |
1320 | to transform it first. */ |
1321 | wchar_t *wczone; |
1322 | size_t len; |
1323 | widen (zone, wczone, len); |
1324 | cpy (len, wczone); |
1325 | } |
1326 | #else |
1327 | cpy (strlen (zone), zone); |
1328 | #endif |
1329 | break; |
1330 | |
1331 | case L_('z'): |
1332 | if (tp->tm_isdst < 0) |
1333 | break; |
1334 | |
1335 | { |
1336 | int diff; |
1337 | #if HAVE_TM_GMTOFF |
1338 | diff = tp->tm_gmtoff; |
1339 | #else |
1340 | if (ut) |
1341 | diff = 0; |
1342 | else |
1343 | { |
1344 | struct tm gtm; |
1345 | struct tm ltm; |
1346 | time_t lt; |
1347 | |
1348 | /* POSIX.1 requires that local time zone information is used as |
1349 | though strftime called tzset. */ |
1350 | # if HAVE_TZSET |
1351 | if (!*tzset_called) |
1352 | { |
1353 | tzset (); |
1354 | *tzset_called = true; |
1355 | } |
1356 | # endif |
1357 | |
1358 | ltm = *tp; |
1359 | lt = mktime (<m); |
1360 | |
1361 | if (lt == (time_t) -1) |
1362 | { |
1363 | /* mktime returns -1 for errors, but -1 is also a |
1364 | valid time_t value. Check whether an error really |
1365 | occurred. */ |
1366 | struct tm tm; |
1367 | |
1368 | if (! __localtime_r (<, &tm) |
1369 | || ((ltm.tm_sec ^ tm.tm_sec) |
1370 | | (ltm.tm_min ^ tm.tm_min) |
1371 | | (ltm.tm_hour ^ tm.tm_hour) |
1372 | | (ltm.tm_mday ^ tm.tm_mday) |
1373 | | (ltm.tm_mon ^ tm.tm_mon) |
1374 | | (ltm.tm_year ^ tm.tm_year))) |
1375 | break; |
1376 | } |
1377 | |
1378 | if (! __gmtime_r (<, >m)) |
1379 | break; |
1380 | |
1381 | diff = tm_diff (<m, >m); |
1382 | } |
1383 | #endif |
1384 | |
1385 | if (diff < 0) |
1386 | { |
1387 | add (1, *p = L_('-')); |
1388 | diff = -diff; |
1389 | } |
1390 | else |
1391 | add (1, *p = L_('+')); |
1392 | |
1393 | diff /= 60; |
1394 | DO_NUMBER (4, (diff / 60) * 100 + diff % 60); |
1395 | } |
1396 | |
1397 | case L_('\0'): /* GNU extension: % at end of format. */ |
1398 | --f; |
1399 | /* Fall through. */ |
1400 | default: |
1401 | /* Unknown format; output the format, including the '%', |
1402 | since this is most likely the right thing to do if a |
1403 | multibyte string has been misparsed. */ |
1404 | bad_format: |
1405 | { |
1406 | int flen; |
1407 | for (flen = 1; f[1 - flen] != L_('%'); flen++) |
1408 | continue; |
1409 | cpy (flen, &f[1 - flen]); |
1410 | } |
1411 | break; |
1412 | } |
1413 | } |
1414 | |
1415 | if (p && maxsize != 0) |
1416 | *p = L_('\0'); |
1417 | return i; |
1418 | } |
1419 | |
1420 | |
1421 | #ifdef emacs |
1422 | /* For Emacs we have a separate interface which corresponds to the normal |
1423 | strftime function and does not have the extra information whether the |
1424 | TP arguments comes from a `gmtime' call or not. */ |
1425 | size_t |
1426 | emacs_strftime (char *s, size_t maxsize, const char *format, |
1427 | const struct tm *tp) |
1428 | { |
1429 | return my_strftime (s, maxsize, format, tp, 0); |
1430 | } |
1431 | #endif |
1432 | |
1433 | #if defined _LIBC && !defined COMPILE_WIDE |
1434 | weak_alias (__strftime_l, strftime_l) |
1435 | #endif |
1436 | |