Commit | Line | Data |
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1823194b | 1 | /* Copyright (C) 1991,92,93,94,95,96,97,98 Free Software Foundation, Inc. |
89752145 | 2 | NOTE: The canonical source of this file is maintained with the GNU C Library. |
1823194b | 3 | Bugs can be reported to bug-glibc@gnu.org. |
8ce9b63e | 4 | |
89752145 PE |
5 | This program is free software; you can redistribute it and/or modify it |
6 | under the terms of the GNU General Public License as published by the | |
7 | Free Software Foundation; either version 2, or (at your option) any | |
8 | later version. | |
8ce9b63e | 9 | |
89752145 PE |
10 | This program is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
8ce9b63e | 14 | |
89752145 | 15 | You should have received a copy of the GNU General Public License |
68c45bf0 PE |
16 | along with this program; if not, write to the Free Software Foundation, |
17 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
49fb5799 PE |
18 | |
19 | #ifdef HAVE_CONFIG_H | |
20 | # include <config.h> | |
21 | #endif | |
22 | ||
23 | #ifdef _LIBC | |
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 MULTIBYTE_IS_FORMAT_SAFE 1 | |
33 | # define STDC_HEADERS 1 | |
49fb5799 PE |
34 | # include "../locale/localeinfo.h" |
35 | #endif | |
36 | ||
ffa0434b PE |
37 | #if defined emacs && !defined HAVE_BCOPY |
38 | # define HAVE_MEMCPY 1 | |
39 | #endif | |
40 | ||
49fb5799 PE |
41 | #include <ctype.h> |
42 | #include <sys/types.h> /* Some systems define `time_t' here. */ | |
43 | ||
44 | #ifdef TIME_WITH_SYS_TIME | |
45 | # include <sys/time.h> | |
46 | # include <time.h> | |
47 | #else | |
48 | # ifdef HAVE_SYS_TIME_H | |
49 | # include <sys/time.h> | |
50 | # else | |
51 | # include <time.h> | |
52 | # endif | |
53 | #endif | |
54 | #if HAVE_TZNAME | |
55 | extern char *tzname[]; | |
56 | #endif | |
57 | ||
58 | /* Do multibyte processing if multibytes are supported, unless | |
59 | multibyte sequences are safe in formats. Multibyte sequences are | |
60 | safe if they cannot contain byte sequences that look like format | |
61 | conversion specifications. The GNU C Library uses UTF8 multibyte | |
62 | encoding, which is safe for formats, but strftime.c can be used | |
63 | with other C libraries that use unsafe encodings. */ | |
64 | #define DO_MULTIBYTE (HAVE_MBLEN && ! MULTIBYTE_IS_FORMAT_SAFE) | |
65 | ||
66 | #if DO_MULTIBYTE | |
67 | # if HAVE_MBRLEN | |
68 | # include <wchar.h> | |
69 | # else | |
70 | /* Simulate mbrlen with mblen as best we can. */ | |
71 | # define mbstate_t int | |
72 | # define mbrlen(s, n, ps) mblen (s, n) | |
73 | # define mbsinit(ps) (*(ps) == 0) | |
74 | # endif | |
75 | static const mbstate_t mbstate_zero; | |
76 | #endif | |
77 | ||
78 | #if HAVE_LIMITS_H | |
79 | # include <limits.h> | |
80 | #endif | |
81 | ||
82 | #if STDC_HEADERS | |
83 | # include <stddef.h> | |
84 | # include <stdlib.h> | |
85 | # include <string.h> | |
86 | #else | |
1b65a66c PE |
87 | # ifndef HAVE_MEMCPY |
88 | # define memcpy(d, s, n) bcopy ((s), (d), (n)) | |
89 | # endif | |
49fb5799 PE |
90 | #endif |
91 | ||
4e941b8e UD |
92 | #ifdef _LIBC |
93 | # define MEMPCPY(d, s, n) __mempcpy (d, s, n) | |
94 | #else | |
95 | # ifndef HAVE_MEMPCPY | |
96 | # define MEMPCPY(d, s, n) ((void *) ((char *) memcpy (d, s, n) + (n))) | |
97 | # endif | |
98 | #endif | |
99 | ||
49fb5799 PE |
100 | #ifndef __P |
101 | # if defined (__GNUC__) || (defined (__STDC__) && __STDC__) | |
102 | # define __P(args) args | |
103 | # else | |
104 | # define __P(args) () | |
105 | # endif /* GCC. */ | |
106 | #endif /* Not __P. */ | |
107 | ||
108 | #ifndef PTR | |
109 | # ifdef __STDC__ | |
110 | # define PTR void * | |
111 | # else | |
112 | # define PTR char * | |
113 | # endif | |
114 | #endif | |
115 | ||
116 | #ifndef CHAR_BIT | |
117 | # define CHAR_BIT 8 | |
118 | #endif | |
119 | ||
120 | #ifndef NULL | |
121 | # define NULL 0 | |
122 | #endif | |
123 | ||
124 | #define TYPE_SIGNED(t) ((t) -1 < 0) | |
125 | ||
126 | /* Bound on length of the string representing an integer value of type t. | |
127 | Subtract one for the sign bit if t is signed; | |
128 | 302 / 1000 is log10 (2) rounded up; | |
129 | add one for integer division truncation; | |
130 | add one more for a minus sign if t is signed. */ | |
131 | #define INT_STRLEN_BOUND(t) \ | |
68c45bf0 | 132 | ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 + 1 + TYPE_SIGNED (t)) |
49fb5799 PE |
133 | |
134 | #define TM_YEAR_BASE 1900 | |
135 | ||
136 | #ifndef __isleap | |
137 | /* Nonzero if YEAR is a leap year (every 4 years, | |
138 | except every 100th isn't, and every 400th is). */ | |
139 | # define __isleap(year) \ | |
140 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) | |
141 | #endif | |
142 | ||
143 | ||
144 | #ifdef _LIBC | |
68c45bf0 PE |
145 | # define my_strftime_gmtime_r __gmtime_r |
146 | # define my_strftime_localtime_r __localtime_r | |
49fb5799 PE |
147 | # define tzname __tzname |
148 | # define tzset __tzset | |
149 | #else | |
68c45bf0 PE |
150 | |
151 | /* If we're a strftime substitute in a GNU program, then prefer gmtime | |
152 | to gmtime_r, since many gmtime_r implementations are buggy. | |
153 | Similarly for localtime_r. */ | |
154 | ||
155 | # if ! HAVE_TM_GMTOFF | |
156 | static struct tm *my_strftime_gmtime_r __P ((const time_t *, struct tm *)); | |
49fb5799 | 157 | static struct tm * |
68c45bf0 | 158 | my_strftime_gmtime_r (t, tp) |
49fb5799 PE |
159 | const time_t *t; |
160 | struct tm *tp; | |
161 | { | |
162 | struct tm *l = gmtime (t); | |
163 | if (! l) | |
164 | return 0; | |
165 | *tp = *l; | |
166 | return tp; | |
167 | } | |
68c45bf0 | 168 | # endif /* ! HAVE_TM_GMTOFF */ |
49fb5799 | 169 | |
68c45bf0 | 170 | static struct tm *my_strftime_localtime_r __P ((const time_t *, struct tm *)); |
49fb5799 | 171 | static struct tm * |
68c45bf0 | 172 | my_strftime_localtime_r (t, tp) |
49fb5799 PE |
173 | const time_t *t; |
174 | struct tm *tp; | |
175 | { | |
176 | struct tm *l = localtime (t); | |
177 | if (! l) | |
178 | return 0; | |
179 | *tp = *l; | |
180 | return tp; | |
181 | } | |
649e97a3 | 182 | #endif /* ! defined _LIBC */ |
49fb5799 PE |
183 | |
184 | ||
1b65a66c | 185 | #if !defined memset && !defined HAVE_MEMSET && !defined _LIBC |
49fb5799 PE |
186 | /* Some systems lack the `memset' function and we don't want to |
187 | introduce additional dependencies. */ | |
c72e6644 RS |
188 | /* The SGI compiler reportedly barfs on the trailing null |
189 | if we use a string constant as the initializer. 28 June 1997, rms. */ | |
1b65a66c PE |
190 | static const char spaces[16] = /* " " */ |
191 | { ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ' }; | |
192 | static const char zeroes[16] = /* "0000000000000000" */ | |
193 | { '0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0' }; | |
49fb5799 PE |
194 | |
195 | # define memset_space(P, Len) \ | |
196 | do { \ | |
197 | int _len = (Len); \ | |
198 | \ | |
199 | do \ | |
200 | { \ | |
201 | int _this = _len > 16 ? 16 : _len; \ | |
649e97a3 | 202 | (P) = MEMPCPY ((P), spaces, _this); \ |
49fb5799 PE |
203 | _len -= _this; \ |
204 | } \ | |
205 | while (_len > 0); \ | |
206 | } while (0) | |
098401cf PE |
207 | |
208 | # define memset_zero(P, Len) \ | |
209 | do { \ | |
210 | int _len = (Len); \ | |
211 | \ | |
212 | do \ | |
213 | { \ | |
214 | int _this = _len > 16 ? 16 : _len; \ | |
649e97a3 | 215 | (P) = MEMPCPY ((P), zeroes, _this); \ |
098401cf PE |
216 | _len -= _this; \ |
217 | } \ | |
218 | while (_len > 0); \ | |
219 | } while (0) | |
49fb5799 PE |
220 | #else |
221 | # define memset_space(P, Len) (memset ((P), ' ', (Len)), (P) += (Len)) | |
098401cf | 222 | # define memset_zero(P, Len) (memset ((P), '0', (Len)), (P) += (Len)) |
49fb5799 PE |
223 | #endif |
224 | ||
1b65a66c | 225 | #define add(n, f) \ |
49fb5799 PE |
226 | do \ |
227 | { \ | |
228 | int _n = (n); \ | |
229 | int _delta = width - _n; \ | |
230 | int _incr = _n + (_delta > 0 ? _delta : 0); \ | |
231 | if (i + _incr >= maxsize) \ | |
232 | return 0; \ | |
233 | if (p) \ | |
234 | { \ | |
235 | if (_delta > 0) \ | |
098401cf PE |
236 | { \ |
237 | if (pad == '0') \ | |
238 | memset_zero (p, _delta); \ | |
239 | else \ | |
240 | memset_space (p, _delta); \ | |
241 | } \ | |
49fb5799 PE |
242 | f; \ |
243 | p += _n; \ | |
244 | } \ | |
245 | i += _incr; \ | |
246 | } while (0) | |
247 | ||
1b65a66c | 248 | #define cpy(n, s) \ |
49fb5799 PE |
249 | add ((n), \ |
250 | if (to_lowcase) \ | |
251 | memcpy_lowcase (p, (s), _n); \ | |
252 | else if (to_uppcase) \ | |
253 | memcpy_uppcase (p, (s), _n); \ | |
254 | else \ | |
255 | memcpy ((PTR) p, (PTR) (s), _n)) | |
256 | ||
257 | ||
258 | ||
259 | #ifdef _LIBC | |
260 | # define TOUPPER(Ch) toupper (Ch) | |
261 | # define TOLOWER(Ch) tolower (Ch) | |
262 | #else | |
263 | # define TOUPPER(Ch) (islower (Ch) ? toupper (Ch) : (Ch)) | |
264 | # define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch)) | |
265 | #endif | |
266 | /* We don't use `isdigit' here since the locale dependent | |
267 | interpretation is not what we want here. We only need to accept | |
268 | the arabic digits in the ASCII range. One day there is perhaps a | |
269 | more reliable way to accept other sets of digits. */ | |
270 | #define ISDIGIT(Ch) ((unsigned int) (Ch) - '0' <= 9) | |
271 | ||
272 | static char *memcpy_lowcase __P ((char *dest, const char *src, size_t len)); | |
273 | ||
274 | static char * | |
275 | memcpy_lowcase (dest, src, len) | |
276 | char *dest; | |
277 | const char *src; | |
278 | size_t len; | |
279 | { | |
280 | while (len-- > 0) | |
4b7c78fc | 281 | dest[len] = TOLOWER ((unsigned char) src[len]); |
49fb5799 PE |
282 | return dest; |
283 | } | |
284 | ||
285 | static char *memcpy_uppcase __P ((char *dest, const char *src, size_t len)); | |
286 | ||
287 | static char * | |
288 | memcpy_uppcase (dest, src, len) | |
289 | char *dest; | |
290 | const char *src; | |
291 | size_t len; | |
292 | { | |
293 | while (len-- > 0) | |
4b7c78fc | 294 | dest[len] = TOUPPER ((unsigned char) src[len]); |
49fb5799 PE |
295 | return dest; |
296 | } | |
297 | ||
1b65a66c | 298 | |
49fb5799 PE |
299 | #if ! HAVE_TM_GMTOFF |
300 | /* Yield the difference between *A and *B, | |
301 | measured in seconds, ignoring leap seconds. */ | |
1b65a66c | 302 | # define tm_diff ftime_tm_diff |
49fb5799 PE |
303 | static int tm_diff __P ((const struct tm *, const struct tm *)); |
304 | static int | |
305 | tm_diff (a, b) | |
306 | const struct tm *a; | |
307 | const struct tm *b; | |
308 | { | |
309 | /* Compute intervening leap days correctly even if year is negative. | |
310 | Take care to avoid int overflow in leap day calculations, | |
311 | but it's OK to assume that A and B are close to each other. */ | |
312 | int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3); | |
313 | int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3); | |
314 | int a100 = a4 / 25 - (a4 % 25 < 0); | |
315 | int b100 = b4 / 25 - (b4 % 25 < 0); | |
316 | int a400 = a100 >> 2; | |
317 | int b400 = b100 >> 2; | |
318 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); | |
319 | int years = a->tm_year - b->tm_year; | |
320 | int days = (365 * years + intervening_leap_days | |
321 | + (a->tm_yday - b->tm_yday)); | |
322 | return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) | |
323 | + (a->tm_min - b->tm_min)) | |
324 | + (a->tm_sec - b->tm_sec)); | |
325 | } | |
326 | #endif /* ! HAVE_TM_GMTOFF */ | |
327 | ||
328 | ||
329 | ||
330 | /* The number of days from the first day of the first ISO week of this | |
331 | year to the year day YDAY with week day WDAY. ISO weeks start on | |
332 | Monday; the first ISO week has the year's first Thursday. YDAY may | |
333 | be as small as YDAY_MINIMUM. */ | |
334 | #define ISO_WEEK_START_WDAY 1 /* Monday */ | |
335 | #define ISO_WEEK1_WDAY 4 /* Thursday */ | |
336 | #define YDAY_MINIMUM (-366) | |
337 | static int iso_week_days __P ((int, int)); | |
338 | #ifdef __GNUC__ | |
ffa0434b | 339 | __inline__ |
49fb5799 PE |
340 | #endif |
341 | static int | |
342 | iso_week_days (yday, wday) | |
343 | int yday; | |
344 | int wday; | |
345 | { | |
346 | /* Add enough to the first operand of % to make it nonnegative. */ | |
347 | int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7; | |
348 | return (yday | |
349 | - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7 | |
350 | + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY); | |
351 | } | |
352 | ||
353 | ||
4b7c78fc | 354 | #if !(defined _NL_CURRENT || HAVE_STRFTIME) |
49fb5799 PE |
355 | static char const weekday_name[][10] = |
356 | { | |
357 | "Sunday", "Monday", "Tuesday", "Wednesday", | |
358 | "Thursday", "Friday", "Saturday" | |
359 | }; | |
360 | static char const month_name[][10] = | |
361 | { | |
362 | "January", "February", "March", "April", "May", "June", | |
363 | "July", "August", "September", "October", "November", "December" | |
364 | }; | |
365 | #endif | |
366 | ||
367 | ||
4b7c78fc | 368 | #ifdef emacs |
68c45bf0 PE |
369 | # define my_strftime emacs_strftimeu |
370 | # define ut_argument , ut | |
371 | # define ut_argument_spec int ut; | |
372 | # define ut_argument_spec_iso , int ut | |
4b7c78fc UD |
373 | #else |
374 | # define my_strftime strftime | |
68c45bf0 PE |
375 | # define ut_argument |
376 | # define ut_argument_spec | |
377 | # define ut_argument_spec_iso | |
378 | /* We don't have this information in general. */ | |
379 | # define ut 0 | |
4b7c78fc UD |
380 | #endif |
381 | ||
49fb5799 PE |
382 | #if !defined _LIBC && HAVE_TZNAME && HAVE_TZSET |
383 | /* Solaris 2.5 tzset sometimes modifies the storage returned by localtime. | |
384 | Work around this bug by copying *tp before it might be munged. */ | |
385 | size_t _strftime_copytm __P ((char *, size_t, const char *, | |
68c45bf0 | 386 | const struct tm * ut_argument_spec_iso)); |
49fb5799 | 387 | size_t |
68c45bf0 | 388 | my_strftime (s, maxsize, format, tp ut_argument) |
49fb5799 PE |
389 | char *s; |
390 | size_t maxsize; | |
391 | const char *format; | |
392 | const struct tm *tp; | |
68c45bf0 | 393 | ut_argument_spec |
49fb5799 PE |
394 | { |
395 | struct tm tmcopy; | |
396 | tmcopy = *tp; | |
68c45bf0 | 397 | return _strftime_copytm (s, maxsize, format, &tmcopy ut_argument); |
49fb5799 | 398 | } |
4b7c78fc | 399 | # undef my_strftime |
68c45bf0 | 400 | # define my_strftime _strftime_copytm |
49fb5799 PE |
401 | #endif |
402 | ||
403 | ||
404 | /* Write information from TP into S according to the format | |
405 | string FORMAT, writing no more that MAXSIZE characters | |
406 | (including the terminating '\0') and returning number of | |
407 | characters written. If S is NULL, nothing will be written | |
408 | anywhere, so to determine how many characters would be | |
409 | written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */ | |
410 | size_t | |
68c45bf0 | 411 | my_strftime (s, maxsize, format, tp ut_argument) |
49fb5799 PE |
412 | char *s; |
413 | size_t maxsize; | |
414 | const char *format; | |
415 | const struct tm *tp; | |
68c45bf0 | 416 | ut_argument_spec |
49fb5799 PE |
417 | { |
418 | int hour12 = tp->tm_hour; | |
419 | #ifdef _NL_CURRENT | |
68c45bf0 PE |
420 | /* We cannot make the following values variables since we must delay |
421 | the evaluation of these values until really needed since some | |
422 | expressions might not be valid in every situation. The `struct tm' | |
423 | might be generated by a strptime() call that initialized | |
424 | only a few elements. Dereference the pointers only if the format | |
425 | requires this. Then it is ok to fail if the pointers are invalid. */ | |
426 | # define a_wkday _NL_CURRENT (LC_TIME, ABDAY_1 + tp->tm_wday) | |
427 | # define f_wkday _NL_CURRENT (LC_TIME, DAY_1 + tp->tm_wday) | |
428 | # define a_month _NL_CURRENT (LC_TIME, ABMON_1 + tp->tm_mon) | |
429 | # define f_month _NL_CURRENT (LC_TIME, MON_1 + tp->tm_mon) | |
430 | # define ampm _NL_CURRENT (LC_TIME, tp->tm_hour > 11 ? PM_STR : AM_STR) | |
431 | ||
432 | # define aw_len strlen (a_wkday) | |
433 | # define am_len strlen (a_month) | |
434 | # define ap_len strlen (ampm) | |
49fb5799 | 435 | #else |
4b7c78fc | 436 | # if !HAVE_STRFTIME |
68c45bf0 PE |
437 | # define f_wkday (weekday_name[tp->tm_wday]) |
438 | # define f_month (month_name[tp->tm_mon]) | |
439 | # define a_wkday f_wkday | |
440 | # define a_month f_month | |
441 | # define ampm ("AMPM" + 2 * (tp->tm_hour > 11)) | |
442 | ||
49fb5799 PE |
443 | size_t aw_len = 3; |
444 | size_t am_len = 3; | |
445 | size_t ap_len = 2; | |
4b7c78fc | 446 | # endif |
4b7c78fc | 447 | #endif |
49fb5799 | 448 | const char *zone; |
49fb5799 PE |
449 | size_t i = 0; |
450 | char *p = s; | |
451 | const char *f; | |
452 | ||
453 | zone = NULL; | |
1b65a66c PE |
454 | #if HAVE_TM_ZONE |
455 | /* The POSIX test suite assumes that setting | |
49fb5799 PE |
456 | the environment variable TZ to a new value before calling strftime() |
457 | will influence the result (the %Z format) even if the information in | |
1b65a66c PE |
458 | TP is computed with a totally different time zone. |
459 | This is bogus: though POSIX allows bad behavior like this, | |
460 | POSIX does not require it. Do the right thing instead. */ | |
49fb5799 PE |
461 | zone = (const char *) tp->tm_zone; |
462 | #endif | |
463 | #if HAVE_TZNAME | |
68c45bf0 PE |
464 | if (ut) |
465 | { | |
466 | if (! (zone && *zone)) | |
467 | zone = "GMT"; | |
468 | } | |
469 | else | |
470 | { | |
471 | /* POSIX.1 8.1.1 requires that whenever strftime() is called, the | |
472 | time zone names contained in the external variable `tzname' shall | |
473 | be set as if the tzset() function had been called. */ | |
49fb5799 | 474 | # if HAVE_TZSET |
68c45bf0 | 475 | tzset (); |
49fb5799 | 476 | # endif |
68c45bf0 | 477 | } |
49fb5799 | 478 | #endif |
49fb5799 PE |
479 | |
480 | if (hour12 > 12) | |
481 | hour12 -= 12; | |
482 | else | |
68c45bf0 PE |
483 | if (hour12 == 0) |
484 | hour12 = 12; | |
49fb5799 PE |
485 | |
486 | for (f = format; *f != '\0'; ++f) | |
487 | { | |
1823194b | 488 | int pad = 0; /* Padding for number ('-', '_', or 0). */ |
49fb5799 PE |
489 | int modifier; /* Field modifier ('E', 'O', or 0). */ |
490 | int digits; /* Max digits for numeric format. */ | |
491 | int number_value; /* Numeric value to be printed. */ | |
492 | int negative_number; /* 1 if the number is negative. */ | |
493 | const char *subfmt; | |
494 | char *bufp; | |
495 | char buf[1 + (sizeof (int) < sizeof (time_t) | |
496 | ? INT_STRLEN_BOUND (time_t) | |
497 | : INT_STRLEN_BOUND (int))]; | |
498 | int width = -1; | |
499 | int to_lowcase = 0; | |
500 | int to_uppcase = 0; | |
1b65a66c | 501 | int change_case = 0; |
4b7c78fc | 502 | int format_char; |
49fb5799 PE |
503 | |
504 | #if DO_MULTIBYTE | |
505 | ||
506 | switch (*f) | |
507 | { | |
508 | case '%': | |
509 | break; | |
510 | ||
511 | case '\a': case '\b': case '\t': case '\n': | |
512 | case '\v': case '\f': case '\r': | |
513 | case ' ': case '!': case '"': case '#': case '&': case'\'': | |
514 | case '(': case ')': case '*': case '+': case ',': case '-': | |
515 | case '.': case '/': case '0': case '1': case '2': case '3': | |
516 | case '4': case '5': case '6': case '7': case '8': case '9': | |
517 | case ':': case ';': case '<': case '=': case '>': case '?': | |
518 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | |
519 | case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': | |
520 | case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': | |
521 | case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': | |
522 | case 'Y': case 'Z': case '[': case'\\': case ']': case '^': | |
523 | case '_': case 'a': case 'b': case 'c': case 'd': case 'e': | |
524 | case 'f': case 'g': case 'h': case 'i': case 'j': case 'k': | |
525 | case 'l': case 'm': case 'n': case 'o': case 'p': case 'q': | |
526 | case 'r': case 's': case 't': case 'u': case 'v': case 'w': | |
527 | case 'x': case 'y': case 'z': case '{': case '|': case '}': | |
528 | case '~': | |
529 | /* The C Standard requires these 98 characters (plus '%') to | |
530 | be in the basic execution character set. None of these | |
531 | characters can start a multibyte sequence, so they need | |
532 | not be analyzed further. */ | |
533 | add (1, *p = *f); | |
534 | continue; | |
535 | ||
536 | default: | |
537 | /* Copy this multibyte sequence until we reach its end, find | |
538 | an error, or come back to the initial shift state. */ | |
539 | { | |
540 | mbstate_t mbstate = mbstate_zero; | |
541 | size_t len = 0; | |
542 | ||
543 | do | |
544 | { | |
545 | size_t bytes = mbrlen (f + len, (size_t) -1, &mbstate); | |
546 | ||
547 | if (bytes == 0) | |
548 | break; | |
549 | ||
68c45bf0 PE |
550 | if (bytes == (size_t) -2) |
551 | { | |
552 | len += strlen (f + len); | |
553 | break; | |
554 | } | |
555 | ||
556 | if (bytes == (size_t) -1) | |
49fb5799 PE |
557 | { |
558 | len++; | |
559 | break; | |
560 | } | |
561 | ||
562 | len += bytes; | |
563 | } | |
564 | while (! mbsinit (&mbstate)); | |
565 | ||
566 | cpy (len, f); | |
68c45bf0 | 567 | f += len - 1; |
49fb5799 PE |
568 | continue; |
569 | } | |
570 | } | |
571 | ||
572 | #else /* ! DO_MULTIBYTE */ | |
573 | ||
574 | /* Either multibyte encodings are not supported, or they are | |
575 | safe for formats, so any non-'%' byte can be copied through. */ | |
576 | if (*f != '%') | |
577 | { | |
578 | add (1, *p = *f); | |
579 | continue; | |
580 | } | |
581 | ||
582 | #endif /* ! DO_MULTIBYTE */ | |
583 | ||
584 | /* Check for flags that can modify a format. */ | |
49fb5799 PE |
585 | while (1) |
586 | { | |
587 | switch (*++f) | |
588 | { | |
589 | /* This influences the number formats. */ | |
590 | case '_': | |
591 | case '-': | |
592 | case '0': | |
593 | pad = *f; | |
594 | continue; | |
595 | ||
596 | /* This changes textual output. */ | |
597 | case '^': | |
598 | to_uppcase = 1; | |
599 | continue; | |
1b65a66c PE |
600 | case '#': |
601 | change_case = 1; | |
602 | continue; | |
49fb5799 PE |
603 | |
604 | default: | |
605 | break; | |
606 | } | |
607 | break; | |
608 | } | |
609 | ||
610 | /* As a GNU extension we allow to specify the field width. */ | |
611 | if (ISDIGIT (*f)) | |
612 | { | |
613 | width = 0; | |
614 | do | |
615 | { | |
616 | width *= 10; | |
617 | width += *f - '0'; | |
618 | ++f; | |
619 | } | |
620 | while (ISDIGIT (*f)); | |
621 | } | |
622 | ||
623 | /* Check for modifiers. */ | |
624 | switch (*f) | |
625 | { | |
626 | case 'E': | |
627 | case 'O': | |
628 | modifier = *f++; | |
629 | break; | |
630 | ||
631 | default: | |
632 | modifier = 0; | |
633 | break; | |
634 | } | |
635 | ||
636 | /* Now do the specified format. */ | |
4b7c78fc UD |
637 | format_char = *f; |
638 | switch (format_char) | |
49fb5799 PE |
639 | { |
640 | #define DO_NUMBER(d, v) \ | |
1b65a66c PE |
641 | digits = width == -1 ? d : width; \ |
642 | number_value = v; goto do_number | |
49fb5799 | 643 | #define DO_NUMBER_SPACEPAD(d, v) \ |
1b65a66c PE |
644 | digits = width == -1 ? d : width; \ |
645 | number_value = v; goto do_number_spacepad | |
49fb5799 PE |
646 | |
647 | case '%': | |
648 | if (modifier != 0) | |
649 | goto bad_format; | |
650 | add (1, *p = *f); | |
651 | break; | |
652 | ||
653 | case 'a': | |
654 | if (modifier != 0) | |
655 | goto bad_format; | |
1b65a66c PE |
656 | if (change_case) |
657 | { | |
658 | to_uppcase = 1; | |
659 | to_lowcase = 0; | |
660 | } | |
4b7c78fc | 661 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
49fb5799 PE |
662 | cpy (aw_len, a_wkday); |
663 | break; | |
4b7c78fc UD |
664 | #else |
665 | goto underlying_strftime; | |
666 | #endif | |
49fb5799 PE |
667 | |
668 | case 'A': | |
669 | if (modifier != 0) | |
670 | goto bad_format; | |
1b65a66c PE |
671 | if (change_case) |
672 | { | |
673 | to_uppcase = 1; | |
674 | to_lowcase = 0; | |
675 | } | |
4b7c78fc | 676 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
68c45bf0 | 677 | cpy (strlen (f_wkday), f_wkday); |
49fb5799 | 678 | break; |
4b7c78fc UD |
679 | #else |
680 | goto underlying_strftime; | |
681 | #endif | |
49fb5799 PE |
682 | |
683 | case 'b': | |
684 | case 'h': /* POSIX.2 extension. */ | |
685 | if (modifier != 0) | |
686 | goto bad_format; | |
4b7c78fc | 687 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
49fb5799 PE |
688 | cpy (am_len, a_month); |
689 | break; | |
4b7c78fc UD |
690 | #else |
691 | goto underlying_strftime; | |
692 | #endif | |
49fb5799 PE |
693 | |
694 | case 'B': | |
695 | if (modifier != 0) | |
696 | goto bad_format; | |
1b65a66c PE |
697 | if (change_case) |
698 | { | |
699 | to_uppcase = 1; | |
700 | to_lowcase = 0; | |
701 | } | |
4b7c78fc | 702 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
68c45bf0 | 703 | cpy (strlen (f_month), f_month); |
49fb5799 | 704 | break; |
4b7c78fc UD |
705 | #else |
706 | goto underlying_strftime; | |
707 | #endif | |
49fb5799 PE |
708 | |
709 | case 'c': | |
710 | if (modifier == 'O') | |
711 | goto bad_format; | |
712 | #ifdef _NL_CURRENT | |
713 | if (! (modifier == 'E' | |
714 | && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_T_FMT)) != '\0')) | |
715 | subfmt = _NL_CURRENT (LC_TIME, D_T_FMT); | |
716 | #else | |
4b7c78fc UD |
717 | # if HAVE_STRFTIME |
718 | goto underlying_strftime; | |
719 | # else | |
49fb5799 | 720 | subfmt = "%a %b %e %H:%M:%S %Y"; |
4b7c78fc | 721 | # endif |
49fb5799 PE |
722 | #endif |
723 | ||
724 | subformat: | |
725 | { | |
726 | char *old_start = p; | |
68c45bf0 PE |
727 | size_t len = my_strftime (NULL, (size_t) -1, subfmt, |
728 | tp ut_argument); | |
729 | add (len, my_strftime (p, maxsize - i, subfmt, tp ut_argument)); | |
49fb5799 PE |
730 | |
731 | if (to_uppcase) | |
732 | while (old_start < p) | |
733 | { | |
4b7c78fc | 734 | *old_start = TOUPPER ((unsigned char) *old_start); |
49fb5799 PE |
735 | ++old_start; |
736 | } | |
737 | } | |
738 | break; | |
739 | ||
4b7c78fc UD |
740 | #if HAVE_STRFTIME && ! (defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY) |
741 | underlying_strftime: | |
742 | { | |
743 | /* The relevant information is available only via the | |
744 | underlying strftime implementation, so use that. */ | |
745 | char ufmt[4]; | |
746 | char *u = ufmt; | |
747 | char ubuf[1024]; /* enough for any single format in practice */ | |
748 | size_t len; | |
749 | *u++ = '%'; | |
750 | if (modifier != 0) | |
751 | *u++ = modifier; | |
752 | *u++ = format_char; | |
753 | *u = '\0'; | |
754 | len = strftime (ubuf, sizeof ubuf, ufmt, tp); | |
08b46002 | 755 | if (len == 0 && ubuf[0] != '\0') |
4b7c78fc UD |
756 | return 0; |
757 | cpy (len, ubuf); | |
758 | } | |
759 | break; | |
760 | #endif | |
761 | ||
49fb5799 PE |
762 | case 'C': /* POSIX.2 extension. */ |
763 | if (modifier == 'O') | |
764 | goto bad_format; | |
49fb5799 PE |
765 | if (modifier == 'E') |
766 | { | |
4b7c78fc | 767 | #if HAVE_STRUCT_ERA_ENTRY |
49fb5799 PE |
768 | struct era_entry *era = _nl_get_era_entry (tp); |
769 | if (era) | |
770 | { | |
771 | size_t len = strlen (era->name_fmt); | |
772 | cpy (len, era->name_fmt); | |
773 | break; | |
774 | } | |
4b7c78fc UD |
775 | #else |
776 | # if HAVE_STRFTIME | |
777 | goto underlying_strftime; | |
778 | # endif | |
49fb5799 | 779 | #endif |
4b7c78fc UD |
780 | } |
781 | ||
49fb5799 PE |
782 | { |
783 | int year = tp->tm_year + TM_YEAR_BASE; | |
784 | DO_NUMBER (1, year / 100 - (year % 100 < 0)); | |
785 | } | |
786 | ||
787 | case 'x': | |
788 | if (modifier == 'O') | |
789 | goto bad_format; | |
790 | #ifdef _NL_CURRENT | |
791 | if (! (modifier == 'E' | |
792 | && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_FMT)) != '\0')) | |
793 | subfmt = _NL_CURRENT (LC_TIME, D_FMT); | |
794 | goto subformat; | |
4b7c78fc UD |
795 | #else |
796 | # if HAVE_STRFTIME | |
797 | goto underlying_strftime; | |
798 | # else | |
49fb5799 | 799 | /* Fall through. */ |
4b7c78fc UD |
800 | # endif |
801 | #endif | |
49fb5799 PE |
802 | case 'D': /* POSIX.2 extension. */ |
803 | if (modifier != 0) | |
804 | goto bad_format; | |
805 | subfmt = "%m/%d/%y"; | |
806 | goto subformat; | |
807 | ||
808 | case 'd': | |
809 | if (modifier == 'E') | |
810 | goto bad_format; | |
811 | ||
812 | DO_NUMBER (2, tp->tm_mday); | |
813 | ||
814 | case 'e': /* POSIX.2 extension. */ | |
815 | if (modifier == 'E') | |
816 | goto bad_format; | |
817 | ||
818 | DO_NUMBER_SPACEPAD (2, tp->tm_mday); | |
819 | ||
820 | /* All numeric formats set DIGITS and NUMBER_VALUE and then | |
821 | jump to one of these two labels. */ | |
822 | ||
823 | do_number_spacepad: | |
824 | /* Force `_' flag unless overwritten by `0' flag. */ | |
825 | if (pad != '0') | |
826 | pad = '_'; | |
827 | ||
828 | do_number: | |
829 | /* Format the number according to the MODIFIER flag. */ | |
830 | ||
49fb5799 PE |
831 | if (modifier == 'O' && 0 <= number_value) |
832 | { | |
4b7c78fc | 833 | #ifdef _NL_CURRENT |
49fb5799 PE |
834 | /* Get the locale specific alternate representation of |
835 | the number NUMBER_VALUE. If none exist NULL is returned. */ | |
836 | const char *cp = _nl_get_alt_digit (number_value); | |
837 | ||
838 | if (cp != NULL) | |
839 | { | |
840 | size_t digitlen = strlen (cp); | |
841 | if (digitlen != 0) | |
842 | { | |
843 | cpy (digitlen, cp); | |
844 | break; | |
845 | } | |
846 | } | |
4b7c78fc UD |
847 | #else |
848 | # if HAVE_STRFTIME | |
849 | goto underlying_strftime; | |
850 | # endif | |
49fb5799 | 851 | #endif |
4b7c78fc | 852 | } |
49fb5799 PE |
853 | { |
854 | unsigned int u = number_value; | |
855 | ||
856 | bufp = buf + sizeof (buf); | |
857 | negative_number = number_value < 0; | |
858 | ||
859 | if (negative_number) | |
860 | u = -u; | |
861 | ||
862 | do | |
863 | *--bufp = u % 10 + '0'; | |
864 | while ((u /= 10) != 0); | |
865 | } | |
866 | ||
867 | do_number_sign_and_padding: | |
868 | if (negative_number) | |
869 | *--bufp = '-'; | |
870 | ||
871 | if (pad != '-') | |
872 | { | |
873 | int padding = digits - (buf + sizeof (buf) - bufp); | |
874 | ||
875 | if (pad == '_') | |
876 | { | |
877 | while (0 < padding--) | |
878 | *--bufp = ' '; | |
879 | } | |
880 | else | |
881 | { | |
882 | bufp += negative_number; | |
883 | while (0 < padding--) | |
884 | *--bufp = '0'; | |
885 | if (negative_number) | |
886 | *--bufp = '-'; | |
887 | } | |
888 | } | |
889 | ||
890 | cpy (buf + sizeof (buf) - bufp, bufp); | |
891 | break; | |
892 | ||
4dab1e80 UD |
893 | case 'F': |
894 | if (modifier != 0) | |
895 | goto bad_format; | |
896 | subfmt = "%Y-%m-%d"; | |
897 | goto subformat; | |
49fb5799 PE |
898 | |
899 | case 'H': | |
900 | if (modifier == 'E') | |
901 | goto bad_format; | |
902 | ||
903 | DO_NUMBER (2, tp->tm_hour); | |
904 | ||
905 | case 'I': | |
906 | if (modifier == 'E') | |
907 | goto bad_format; | |
908 | ||
909 | DO_NUMBER (2, hour12); | |
910 | ||
911 | case 'k': /* GNU extension. */ | |
912 | if (modifier == 'E') | |
913 | goto bad_format; | |
914 | ||
915 | DO_NUMBER_SPACEPAD (2, tp->tm_hour); | |
916 | ||
917 | case 'l': /* GNU extension. */ | |
918 | if (modifier == 'E') | |
919 | goto bad_format; | |
920 | ||
921 | DO_NUMBER_SPACEPAD (2, hour12); | |
922 | ||
923 | case 'j': | |
924 | if (modifier == 'E') | |
925 | goto bad_format; | |
926 | ||
927 | DO_NUMBER (3, 1 + tp->tm_yday); | |
928 | ||
929 | case 'M': | |
930 | if (modifier == 'E') | |
931 | goto bad_format; | |
932 | ||
933 | DO_NUMBER (2, tp->tm_min); | |
934 | ||
935 | case 'm': | |
936 | if (modifier == 'E') | |
937 | goto bad_format; | |
938 | ||
939 | DO_NUMBER (2, tp->tm_mon + 1); | |
940 | ||
941 | case 'n': /* POSIX.2 extension. */ | |
942 | add (1, *p = '\n'); | |
943 | break; | |
944 | ||
945 | case 'P': | |
946 | to_lowcase = 1; | |
4b7c78fc UD |
947 | #if !defined _NL_CURRENT && HAVE_STRFTIME |
948 | format_char = 'p'; | |
949 | #endif | |
49fb5799 PE |
950 | /* FALLTHROUGH */ |
951 | ||
952 | case 'p': | |
1b65a66c PE |
953 | if (change_case) |
954 | { | |
955 | to_uppcase = 0; | |
956 | to_lowcase = 1; | |
957 | } | |
4b7c78fc | 958 | #if defined _NL_CURRENT || !HAVE_STRFTIME |
49fb5799 PE |
959 | cpy (ap_len, ampm); |
960 | break; | |
4b7c78fc UD |
961 | #else |
962 | goto underlying_strftime; | |
963 | #endif | |
49fb5799 PE |
964 | |
965 | case 'R': /* GNU extension. */ | |
966 | subfmt = "%H:%M"; | |
967 | goto subformat; | |
968 | ||
969 | case 'r': /* POSIX.2 extension. */ | |
970 | #ifdef _NL_CURRENT | |
971 | if (*(subfmt = _NL_CURRENT (LC_TIME, T_FMT_AMPM)) == '\0') | |
972 | #endif | |
973 | subfmt = "%I:%M:%S %p"; | |
974 | goto subformat; | |
975 | ||
976 | case 'S': | |
977 | if (modifier == 'E') | |
978 | goto bad_format; | |
979 | ||
980 | DO_NUMBER (2, tp->tm_sec); | |
981 | ||
982 | case 's': /* GNU extension. */ | |
983 | { | |
984 | struct tm ltm; | |
985 | time_t t; | |
986 | ||
987 | ltm = *tp; | |
988 | t = mktime (<m); | |
989 | ||
990 | /* Generate string value for T using time_t arithmetic; | |
991 | this works even if sizeof (long) < sizeof (time_t). */ | |
992 | ||
993 | bufp = buf + sizeof (buf); | |
994 | negative_number = t < 0; | |
995 | ||
996 | do | |
997 | { | |
998 | int d = t % 10; | |
999 | t /= 10; | |
1000 | ||
1001 | if (negative_number) | |
1002 | { | |
1003 | d = -d; | |
1004 | ||
1005 | /* Adjust if division truncates to minus infinity. */ | |
1006 | if (0 < -1 % 10 && d < 0) | |
1007 | { | |
1008 | t++; | |
1009 | d += 10; | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | *--bufp = d + '0'; | |
1014 | } | |
1015 | while (t != 0); | |
1016 | ||
1017 | digits = 1; | |
1018 | goto do_number_sign_and_padding; | |
1019 | } | |
1020 | ||
1021 | case 'X': | |
1022 | if (modifier == 'O') | |
1023 | goto bad_format; | |
1024 | #ifdef _NL_CURRENT | |
1025 | if (! (modifier == 'E' | |
1026 | && *(subfmt = _NL_CURRENT (LC_TIME, ERA_T_FMT)) != '\0')) | |
1027 | subfmt = _NL_CURRENT (LC_TIME, T_FMT); | |
1028 | goto subformat; | |
4b7c78fc UD |
1029 | #else |
1030 | # if HAVE_STRFTIME | |
1031 | goto underlying_strftime; | |
1032 | # else | |
49fb5799 | 1033 | /* Fall through. */ |
4b7c78fc UD |
1034 | # endif |
1035 | #endif | |
49fb5799 PE |
1036 | case 'T': /* POSIX.2 extension. */ |
1037 | subfmt = "%H:%M:%S"; | |
1038 | goto subformat; | |
1039 | ||
1040 | case 't': /* POSIX.2 extension. */ | |
1041 | add (1, *p = '\t'); | |
1042 | break; | |
1043 | ||
1044 | case 'u': /* POSIX.2 extension. */ | |
1045 | DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1); | |
1046 | ||
1047 | case 'U': | |
1048 | if (modifier == 'E') | |
1049 | goto bad_format; | |
1050 | ||
1051 | DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7); | |
1052 | ||
1053 | case 'V': | |
1054 | case 'g': /* GNU extension. */ | |
1055 | case 'G': /* GNU extension. */ | |
1056 | if (modifier == 'E') | |
1057 | goto bad_format; | |
1058 | { | |
1059 | int year = tp->tm_year + TM_YEAR_BASE; | |
1060 | int days = iso_week_days (tp->tm_yday, tp->tm_wday); | |
1061 | ||
1062 | if (days < 0) | |
1063 | { | |
1064 | /* This ISO week belongs to the previous year. */ | |
1065 | year--; | |
1066 | days = iso_week_days (tp->tm_yday + (365 + __isleap (year)), | |
1067 | tp->tm_wday); | |
1068 | } | |
1069 | else | |
1070 | { | |
1071 | int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)), | |
1072 | tp->tm_wday); | |
1073 | if (0 <= d) | |
1074 | { | |
1075 | /* This ISO week belongs to the next year. */ | |
1076 | year++; | |
1077 | days = d; | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | switch (*f) | |
1082 | { | |
1083 | case 'g': | |
1084 | DO_NUMBER (2, (year % 100 + 100) % 100); | |
1085 | ||
1086 | case 'G': | |
1087 | DO_NUMBER (1, year); | |
1088 | ||
1089 | default: | |
1090 | DO_NUMBER (2, days / 7 + 1); | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | case 'W': | |
1095 | if (modifier == 'E') | |
1096 | goto bad_format; | |
1097 | ||
1098 | DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7); | |
1099 | ||
1100 | case 'w': | |
1101 | if (modifier == 'E') | |
1102 | goto bad_format; | |
1103 | ||
1104 | DO_NUMBER (1, tp->tm_wday); | |
1105 | ||
1106 | case 'Y': | |
49fb5799 PE |
1107 | if (modifier == 'E') |
1108 | { | |
4b7c78fc | 1109 | #if HAVE_STRUCT_ERA_ENTRY |
49fb5799 PE |
1110 | struct era_entry *era = _nl_get_era_entry (tp); |
1111 | if (era) | |
1112 | { | |
1113 | subfmt = strchr (era->name_fmt, '\0') + 1; | |
1114 | goto subformat; | |
1115 | } | |
4b7c78fc UD |
1116 | #else |
1117 | # if HAVE_STRFTIME | |
1118 | goto underlying_strftime; | |
1119 | # endif | |
49fb5799 | 1120 | #endif |
4b7c78fc | 1121 | } |
49fb5799 PE |
1122 | if (modifier == 'O') |
1123 | goto bad_format; | |
1124 | else | |
1125 | DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE); | |
1126 | ||
1127 | case 'y': | |
49fb5799 PE |
1128 | if (modifier == 'E') |
1129 | { | |
4b7c78fc | 1130 | #if HAVE_STRUCT_ERA_ENTRY |
49fb5799 PE |
1131 | struct era_entry *era = _nl_get_era_entry (tp); |
1132 | if (era) | |
1133 | { | |
1134 | int delta = tp->tm_year - era->start_date[0]; | |
1135 | DO_NUMBER (1, (era->offset | |
1136 | + (era->direction == '-' ? -delta : delta))); | |
1137 | } | |
4b7c78fc UD |
1138 | #else |
1139 | # if HAVE_STRFTIME | |
1140 | goto underlying_strftime; | |
1141 | # endif | |
49fb5799 | 1142 | #endif |
4b7c78fc | 1143 | } |
49fb5799 PE |
1144 | DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100); |
1145 | ||
1146 | case 'Z': | |
1b65a66c PE |
1147 | if (change_case) |
1148 | { | |
1149 | to_uppcase = 0; | |
1150 | to_lowcase = 1; | |
1151 | } | |
68c45bf0 PE |
1152 | |
1153 | #if HAVE_TZNAME | |
1154 | /* The tzset() call might have changed the value. */ | |
1155 | if (!(zone && *zone) && tp->tm_isdst >= 0) | |
1156 | zone = tzname[tp->tm_isdst]; | |
1157 | #endif | |
1158 | if (! zone) | |
1159 | zone = ""; /* POSIX.2 requires the empty string here. */ | |
1160 | ||
1161 | cpy (strlen (zone), zone); | |
49fb5799 PE |
1162 | break; |
1163 | ||
1164 | case 'z': /* GNU extension. */ | |
1165 | if (tp->tm_isdst < 0) | |
1166 | break; | |
1167 | ||
1168 | { | |
1169 | int diff; | |
1170 | #if HAVE_TM_GMTOFF | |
1171 | diff = tp->tm_gmtoff; | |
1172 | #else | |
68c45bf0 PE |
1173 | if (ut) |
1174 | diff = 0; | |
1175 | else | |
1176 | { | |
1177 | struct tm gtm; | |
1178 | struct tm ltm; | |
1179 | time_t lt; | |
49fb5799 | 1180 | |
68c45bf0 PE |
1181 | ltm = *tp; |
1182 | lt = mktime (<m); | |
49fb5799 | 1183 | |
68c45bf0 PE |
1184 | if (lt == (time_t) -1) |
1185 | { | |
1186 | /* mktime returns -1 for errors, but -1 is also a | |
1187 | valid time_t value. Check whether an error really | |
1188 | occurred. */ | |
1189 | struct tm tm; | |
1190 | ||
1191 | if (! my_strftime_localtime_r (<, &tm) | |
1192 | || ((ltm.tm_sec ^ tm.tm_sec) | |
1193 | | (ltm.tm_min ^ tm.tm_min) | |
1194 | | (ltm.tm_hour ^ tm.tm_hour) | |
1195 | | (ltm.tm_mday ^ tm.tm_mday) | |
1196 | | (ltm.tm_mon ^ tm.tm_mon) | |
1197 | | (ltm.tm_year ^ tm.tm_year))) | |
1198 | break; | |
1199 | } | |
49fb5799 | 1200 | |
68c45bf0 PE |
1201 | if (! my_strftime_gmtime_r (<, >m)) |
1202 | break; | |
49fb5799 | 1203 | |
68c45bf0 PE |
1204 | diff = tm_diff (<m, >m); |
1205 | } | |
49fb5799 PE |
1206 | #endif |
1207 | ||
1208 | if (diff < 0) | |
1209 | { | |
1210 | add (1, *p = '-'); | |
1211 | diff = -diff; | |
1212 | } | |
1213 | else | |
1214 | add (1, *p = '+'); | |
1215 | ||
1216 | diff /= 60; | |
1217 | DO_NUMBER (4, (diff / 60) * 100 + diff % 60); | |
1218 | } | |
1219 | ||
1220 | case '\0': /* GNU extension: % at end of format. */ | |
1221 | --f; | |
1222 | /* Fall through. */ | |
1223 | default: | |
1224 | /* Unknown format; output the format, including the '%', | |
1225 | since this is most likely the right thing to do if a | |
1226 | multibyte string has been misparsed. */ | |
1227 | bad_format: | |
1228 | { | |
1229 | int flen; | |
1230 | for (flen = 1; f[1 - flen] != '%'; flen++) | |
1231 | continue; | |
1232 | cpy (flen, &f[1 - flen]); | |
1233 | } | |
1234 | break; | |
1235 | } | |
1236 | } | |
1237 | ||
68c45bf0 | 1238 | if (p && maxsize != 0) |
49fb5799 PE |
1239 | *p = '\0'; |
1240 | return i; | |
1241 | } |