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f0007cad | 1 | /* Copyright (C) 1991-2001, 2003-2007, 2009-2012 Free Software Foundation, Inc. |
e65fc94b LC |
2 | |
3 | NOTE: The canonical source of this file is maintained with the GNU C Library. | |
4 | Bugs can be reported to bug-glibc@prep.ai.mit.edu. | |
5 | ||
6 | This program is free software: you can redistribute it and/or modify | |
7 | it under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifdef _LIBC | |
e65fc94b LC |
20 | # define HAVE_STRUCT_ERA_ENTRY 1 |
21 | # define HAVE_TM_GMTOFF 1 | |
22 | # define HAVE_TM_ZONE 1 | |
23 | # define HAVE_TZNAME 1 | |
24 | # define HAVE_TZSET 1 | |
e65fc94b LC |
25 | # include "../locale/localeinfo.h" |
26 | #else | |
27 | # include <config.h> | |
28 | # if FPRINTFTIME | |
f29ded4b | 29 | # include "ignore-value.h" |
e65fc94b | 30 | # include "fprintftime.h" |
f240aacb LC |
31 | # else |
32 | # include "strftime.h" | |
e65fc94b LC |
33 | # endif |
34 | #endif | |
35 | ||
36 | #include <ctype.h> | |
37 | #include <time.h> | |
38 | ||
39 | #if HAVE_TZNAME && !HAVE_DECL_TZNAME | |
40 | extern char *tzname[]; | |
41 | #endif | |
42 | ||
43 | /* Do multibyte processing if multibytes are supported, unless | |
44 | multibyte sequences are safe in formats. Multibyte sequences are | |
45 | safe if they cannot contain byte sequences that look like format | |
f240aacb LC |
46 | conversion specifications. The multibyte encodings used by the |
47 | C library on the various platforms (UTF-8, GB2312, GBK, CP936, | |
48 | GB18030, EUC-TW, BIG5, BIG5-HKSCS, CP950, EUC-JP, EUC-KR, CP949, | |
49 | SHIFT_JIS, CP932, JOHAB) are safe for formats, because the byte '%' | |
50 | cannot occur in a multibyte character except in the first byte. | |
49114fd4 LC |
51 | |
52 | The DEC-HANYU encoding used on OSF/1 is not safe for formats, but | |
53 | this encoding has never been seen in real-life use, so we ignore | |
54 | it. */ | |
55 | #if !(defined __osf__ && 0) | |
f240aacb LC |
56 | # define MULTIBYTE_IS_FORMAT_SAFE 1 |
57 | #endif | |
58 | #define DO_MULTIBYTE (! MULTIBYTE_IS_FORMAT_SAFE) | |
e65fc94b LC |
59 | |
60 | #if DO_MULTIBYTE | |
4a462e35 | 61 | # include <wchar.h> |
e65fc94b LC |
62 | static const mbstate_t mbstate_zero; |
63 | #endif | |
64 | ||
65 | #include <limits.h> | |
66 | #include <stdbool.h> | |
67 | #include <stddef.h> | |
68 | #include <stdlib.h> | |
69 | #include <string.h> | |
70 | ||
71 | #ifdef COMPILE_WIDE | |
72 | # include <endian.h> | |
73 | # define CHAR_T wchar_t | |
74 | # define UCHAR_T unsigned int | |
75 | # define L_(Str) L##Str | |
76 | # define NLW(Sym) _NL_W##Sym | |
77 | ||
78 | # define MEMCPY(d, s, n) __wmemcpy (d, s, n) | |
79 | # define STRLEN(s) __wcslen (s) | |
80 | ||
81 | #else | |
82 | # define CHAR_T char | |
83 | # define UCHAR_T unsigned char | |
84 | # define L_(Str) Str | |
85 | # define NLW(Sym) Sym | |
86 | ||
87 | # define MEMCPY(d, s, n) memcpy (d, s, n) | |
88 | # define STRLEN(s) strlen (s) | |
89 | ||
e65fc94b LC |
90 | #endif |
91 | ||
92 | /* Shift A right by B bits portably, by dividing A by 2**B and | |
93 | truncating towards minus infinity. A and B should be free of side | |
94 | effects, and B should be in the range 0 <= B <= INT_BITS - 2, where | |
95 | INT_BITS is the number of useful bits in an int. GNU code can | |
96 | assume that INT_BITS is at least 32. | |
97 | ||
98 | ISO C99 says that A >> B is implementation-defined if A < 0. Some | |
99 | implementations (e.g., UNICOS 9.0 on a Cray Y-MP EL) don't shift | |
100 | right in the usual way when A < 0, so SHR falls back on division if | |
101 | ordinary A >> B doesn't seem to be the usual signed shift. */ | |
1cd4fffc LC |
102 | #define SHR(a, b) \ |
103 | (-1 >> 1 == -1 \ | |
104 | ? (a) >> (b) \ | |
e65fc94b LC |
105 | : (a) / (1 << (b)) - ((a) % (1 << (b)) < 0)) |
106 | ||
107 | /* Bound on length of the string representing an integer type or expression T. | |
108 | Subtract 1 for the sign bit if t is signed; log10 (2.0) < 146/485; | |
109 | add 1 for integer division truncation; add 1 more for a minus sign | |
110 | if needed. */ | |
111 | #define INT_STRLEN_BOUND(t) \ | |
112 | ((sizeof (t) * CHAR_BIT - 1) * 146 / 485 + 2) | |
113 | ||
114 | #define TM_YEAR_BASE 1900 | |
115 | ||
116 | #ifndef __isleap | |
117 | /* Nonzero if YEAR is a leap year (every 4 years, | |
118 | except every 100th isn't, and every 400th is). */ | |
1cd4fffc | 119 | # define __isleap(year) \ |
e65fc94b LC |
120 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) |
121 | #endif | |
122 | ||
123 | ||
124 | #ifdef _LIBC | |
125 | # define tzname __tzname | |
126 | # define tzset __tzset | |
127 | #endif | |
128 | ||
129 | #if !HAVE_TM_GMTOFF | |
130 | /* Portable standalone applications should supply a "time.h" that | |
131 | declares a POSIX-compliant localtime_r, for the benefit of older | |
132 | implementations that lack localtime_r or have a nonstandard one. | |
133 | See the gnulib time_r module for one way to implement this. */ | |
134 | # undef __gmtime_r | |
135 | # undef __localtime_r | |
136 | # define __gmtime_r gmtime_r | |
137 | # define __localtime_r localtime_r | |
138 | #endif | |
139 | ||
140 | ||
141 | #ifndef FPRINTFTIME | |
142 | # define FPRINTFTIME 0 | |
143 | #endif | |
144 | ||
145 | #if FPRINTFTIME | |
146 | # define STREAM_OR_CHAR_T FILE | |
147 | # define STRFTIME_ARG(x) /* empty */ | |
148 | #else | |
149 | # define STREAM_OR_CHAR_T CHAR_T | |
150 | # define STRFTIME_ARG(x) x, | |
151 | #endif | |
152 | ||
153 | #if FPRINTFTIME | |
154 | # define memset_byte(P, Len, Byte) \ | |
155 | do { size_t _i; for (_i = 0; _i < Len; _i++) fputc (Byte, P); } while (0) | |
156 | # define memset_space(P, Len) memset_byte (P, Len, ' ') | |
157 | # define memset_zero(P, Len) memset_byte (P, Len, '0') | |
158 | #elif defined COMPILE_WIDE | |
159 | # define memset_space(P, Len) (wmemset (P, L' ', Len), (P) += (Len)) | |
160 | # define memset_zero(P, Len) (wmemset (P, L'0', Len), (P) += (Len)) | |
161 | #else | |
162 | # define memset_space(P, Len) (memset (P, ' ', Len), (P) += (Len)) | |
163 | # define memset_zero(P, Len) (memset (P, '0', Len), (P) += (Len)) | |
164 | #endif | |
165 | ||
166 | #if FPRINTFTIME | |
167 | # define advance(P, N) | |
168 | #else | |
169 | # define advance(P, N) ((P) += (N)) | |
170 | #endif | |
171 | ||
1cd4fffc LC |
172 | #define add(n, f) \ |
173 | do \ | |
174 | { \ | |
dd7d0148 LC |
175 | size_t _n = (n); \ |
176 | size_t _w = (width < 0 ? 0 : width); \ | |
177 | size_t _incr = _n < _w ? _w : _n; \ | |
178 | if (_incr >= maxsize - i) \ | |
1cd4fffc LC |
179 | return 0; \ |
180 | if (p) \ | |
181 | { \ | |
dd7d0148 | 182 | if (digits == 0 && _n < _w) \ |
1cd4fffc | 183 | { \ |
dd7d0148 | 184 | size_t _delta = width - _n; \ |
1cd4fffc LC |
185 | if (pad == L_('0')) \ |
186 | memset_zero (p, _delta); \ | |
187 | else \ | |
188 | memset_space (p, _delta); \ | |
189 | } \ | |
190 | f; \ | |
191 | advance (p, _n); \ | |
192 | } \ | |
193 | i += _incr; \ | |
e65fc94b LC |
194 | } while (0) |
195 | ||
196 | #if FPRINTFTIME | |
197 | # define add1(C) add (1, fputc (C, p)) | |
198 | #else | |
199 | # define add1(C) add (1, *p = C) | |
200 | #endif | |
201 | ||
202 | #if FPRINTFTIME | |
203 | # define cpy(n, s) \ | |
1cd4fffc LC |
204 | add ((n), \ |
205 | do \ | |
206 | { \ | |
207 | if (to_lowcase) \ | |
208 | fwrite_lowcase (p, (s), _n); \ | |
209 | else if (to_uppcase) \ | |
210 | fwrite_uppcase (p, (s), _n); \ | |
211 | else \ | |
212 | { \ | |
213 | /* We are ignoring the value of fwrite here, in spite of the \ | |
214 | fact that technically, that may not be valid: the fwrite \ | |
215 | specification in POSIX 2008 defers to that of fputc, which \ | |
216 | is intended to be consistent with the one from ISO C, \ | |
217 | which permits failure due to ENOMEM *without* setting the \ | |
218 | stream's error indicator. */ \ | |
219 | ignore_value (fwrite ((s), _n, 1, p)); \ | |
220 | } \ | |
221 | } \ | |
222 | while (0) \ | |
8912421c | 223 | ) |
e65fc94b | 224 | #else |
1cd4fffc LC |
225 | # define cpy(n, s) \ |
226 | add ((n), \ | |
227 | if (to_lowcase) \ | |
228 | memcpy_lowcase (p, (s), _n LOCALE_ARG); \ | |
229 | else if (to_uppcase) \ | |
230 | memcpy_uppcase (p, (s), _n LOCALE_ARG); \ | |
231 | else \ | |
232 | MEMCPY ((void *) p, (void const *) (s), _n)) | |
e65fc94b LC |
233 | #endif |
234 | ||
235 | #ifdef COMPILE_WIDE | |
236 | # ifndef USE_IN_EXTENDED_LOCALE_MODEL | |
237 | # undef __mbsrtowcs_l | |
238 | # define __mbsrtowcs_l(d, s, l, st, loc) __mbsrtowcs (d, s, l, st) | |
239 | # endif | |
240 | # define widen(os, ws, l) \ | |
1cd4fffc LC |
241 | { \ |
242 | mbstate_t __st; \ | |
243 | const char *__s = os; \ | |
244 | memset (&__st, '\0', sizeof (__st)); \ | |
245 | l = __mbsrtowcs_l (NULL, &__s, 0, &__st, loc); \ | |
246 | ws = (wchar_t *) alloca ((l + 1) * sizeof (wchar_t)); \ | |
247 | (void) __mbsrtowcs_l (ws, &__s, l, &__st, loc); \ | |
e65fc94b LC |
248 | } |
249 | #endif | |
250 | ||
251 | ||
252 | #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL | |
253 | /* We use this code also for the extended locale handling where the | |
254 | function gets as an additional argument the locale which has to be | |
255 | used. To access the values we have to redefine the _NL_CURRENT | |
256 | macro. */ | |
1cd4fffc LC |
257 | # define strftime __strftime_l |
258 | # define wcsftime __wcsftime_l | |
e65fc94b LC |
259 | # undef _NL_CURRENT |
260 | # define _NL_CURRENT(category, item) \ | |
261 | (current->values[_NL_ITEM_INDEX (item)].string) | |
262 | # define LOCALE_ARG , loc | |
263 | # define LOCALE_PARAM_PROTO , __locale_t loc | |
264 | # define HELPER_LOCALE_ARG , current | |
265 | #else | |
266 | # define LOCALE_PARAM_PROTO | |
267 | # define LOCALE_ARG | |
268 | # ifdef _LIBC | |
269 | # define HELPER_LOCALE_ARG , _NL_CURRENT_DATA (LC_TIME) | |
270 | # else | |
271 | # define HELPER_LOCALE_ARG | |
272 | # endif | |
273 | #endif | |
274 | ||
275 | #ifdef COMPILE_WIDE | |
276 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL | |
277 | # define TOUPPER(Ch, L) __towupper_l (Ch, L) | |
278 | # define TOLOWER(Ch, L) __towlower_l (Ch, L) | |
279 | # else | |
280 | # define TOUPPER(Ch, L) towupper (Ch) | |
281 | # define TOLOWER(Ch, L) towlower (Ch) | |
282 | # endif | |
283 | #else | |
284 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL | |
285 | # define TOUPPER(Ch, L) __toupper_l (Ch, L) | |
286 | # define TOLOWER(Ch, L) __tolower_l (Ch, L) | |
287 | # else | |
288 | # define TOUPPER(Ch, L) toupper (Ch) | |
289 | # define TOLOWER(Ch, L) tolower (Ch) | |
290 | # endif | |
291 | #endif | |
f0007cad | 292 | /* We don't use 'isdigit' here since the locale dependent |
e65fc94b LC |
293 | interpretation is not what we want here. We only need to accept |
294 | the arabic digits in the ASCII range. One day there is perhaps a | |
295 | more reliable way to accept other sets of digits. */ | |
296 | #define ISDIGIT(Ch) ((unsigned int) (Ch) - L_('0') <= 9) | |
297 | ||
298 | #if FPRINTFTIME | |
299 | static void | |
300 | fwrite_lowcase (FILE *fp, const CHAR_T *src, size_t len) | |
301 | { | |
302 | while (len-- > 0) | |
303 | { | |
304 | fputc (TOLOWER ((UCHAR_T) *src, loc), fp); | |
305 | ++src; | |
306 | } | |
307 | } | |
308 | ||
309 | static void | |
310 | fwrite_uppcase (FILE *fp, const CHAR_T *src, size_t len) | |
311 | { | |
312 | while (len-- > 0) | |
313 | { | |
314 | fputc (TOUPPER ((UCHAR_T) *src, loc), fp); | |
315 | ++src; | |
316 | } | |
317 | } | |
318 | #else | |
319 | static CHAR_T * | |
320 | memcpy_lowcase (CHAR_T *dest, const CHAR_T *src, | |
1cd4fffc | 321 | size_t len LOCALE_PARAM_PROTO) |
e65fc94b LC |
322 | { |
323 | while (len-- > 0) | |
324 | dest[len] = TOLOWER ((UCHAR_T) src[len], loc); | |
325 | return dest; | |
326 | } | |
327 | ||
328 | static CHAR_T * | |
329 | memcpy_uppcase (CHAR_T *dest, const CHAR_T *src, | |
1cd4fffc | 330 | size_t len LOCALE_PARAM_PROTO) |
e65fc94b LC |
331 | { |
332 | while (len-- > 0) | |
333 | dest[len] = TOUPPER ((UCHAR_T) src[len], loc); | |
334 | return dest; | |
335 | } | |
336 | #endif | |
337 | ||
338 | ||
339 | #if ! HAVE_TM_GMTOFF | |
340 | /* Yield the difference between *A and *B, | |
341 | measured in seconds, ignoring leap seconds. */ | |
342 | # define tm_diff ftime_tm_diff | |
343 | static int | |
344 | tm_diff (const struct tm *a, const struct tm *b) | |
345 | { | |
346 | /* Compute intervening leap days correctly even if year is negative. | |
347 | Take care to avoid int overflow in leap day calculations, | |
348 | but it's OK to assume that A and B are close to each other. */ | |
349 | int a4 = SHR (a->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (a->tm_year & 3); | |
350 | int b4 = SHR (b->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (b->tm_year & 3); | |
351 | int a100 = a4 / 25 - (a4 % 25 < 0); | |
352 | int b100 = b4 / 25 - (b4 % 25 < 0); | |
353 | int a400 = SHR (a100, 2); | |
354 | int b400 = SHR (b100, 2); | |
355 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); | |
356 | int years = a->tm_year - b->tm_year; | |
357 | int days = (365 * years + intervening_leap_days | |
1cd4fffc | 358 | + (a->tm_yday - b->tm_yday)); |
e65fc94b | 359 | return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) |
1cd4fffc LC |
360 | + (a->tm_min - b->tm_min)) |
361 | + (a->tm_sec - b->tm_sec)); | |
e65fc94b LC |
362 | } |
363 | #endif /* ! HAVE_TM_GMTOFF */ | |
364 | ||
365 | ||
366 | ||
367 | /* The number of days from the first day of the first ISO week of this | |
368 | year to the year day YDAY with week day WDAY. ISO weeks start on | |
369 | Monday; the first ISO week has the year's first Thursday. YDAY may | |
370 | be as small as YDAY_MINIMUM. */ | |
371 | #define ISO_WEEK_START_WDAY 1 /* Monday */ | |
372 | #define ISO_WEEK1_WDAY 4 /* Thursday */ | |
373 | #define YDAY_MINIMUM (-366) | |
374 | #ifdef __GNUC__ | |
375 | __inline__ | |
376 | #endif | |
377 | static int | |
378 | iso_week_days (int yday, int wday) | |
379 | { | |
380 | /* Add enough to the first operand of % to make it nonnegative. */ | |
381 | int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7; | |
382 | return (yday | |
1cd4fffc LC |
383 | - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7 |
384 | + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY); | |
e65fc94b LC |
385 | } |
386 | ||
387 | ||
388 | /* When compiling this file, GNU applications can #define my_strftime | |
389 | to a symbol (typically nstrftime) to get an extended strftime with | |
390 | extra arguments UT and NS. Emacs is a special case for now, but | |
391 | this Emacs-specific code can be removed once Emacs's config.h | |
392 | defines my_strftime. */ | |
393 | #if defined emacs && !defined my_strftime | |
394 | # define my_strftime nstrftime | |
395 | #endif | |
396 | ||
397 | #if FPRINTFTIME | |
398 | # undef my_strftime | |
399 | # define my_strftime fprintftime | |
400 | #endif | |
401 | ||
402 | #ifdef my_strftime | |
403 | # define extra_args , ut, ns | |
404 | # define extra_args_spec , int ut, int ns | |
405 | #else | |
406 | # if defined COMPILE_WIDE | |
407 | # define my_strftime wcsftime | |
408 | # define nl_get_alt_digit _nl_get_walt_digit | |
409 | # else | |
410 | # define my_strftime strftime | |
411 | # define nl_get_alt_digit _nl_get_alt_digit | |
412 | # endif | |
413 | # define extra_args | |
414 | # define extra_args_spec | |
415 | /* We don't have this information in general. */ | |
416 | # define ut 0 | |
417 | # define ns 0 | |
418 | #endif | |
419 | ||
420 | ||
421 | /* Just like my_strftime, below, but with one more parameter, UPCASE, | |
422 | to indicate that the result should be converted to upper case. */ | |
423 | static size_t | |
424 | strftime_case_ (bool upcase, STREAM_OR_CHAR_T *s, | |
1cd4fffc LC |
425 | STRFTIME_ARG (size_t maxsize) |
426 | const CHAR_T *format, | |
427 | const struct tm *tp extra_args_spec LOCALE_PARAM_PROTO) | |
e65fc94b LC |
428 | { |
429 | #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL | |
430 | struct locale_data *const current = loc->__locales[LC_TIME]; | |
431 | #endif | |
432 | #if FPRINTFTIME | |
433 | size_t maxsize = (size_t) -1; | |
434 | #endif | |
435 | ||
436 | int hour12 = tp->tm_hour; | |
437 | #ifdef _NL_CURRENT | |
438 | /* We cannot make the following values variables since we must delay | |
439 | the evaluation of these values until really needed since some | |
f0007cad | 440 | expressions might not be valid in every situation. The 'struct tm' |
e65fc94b LC |
441 | might be generated by a strptime() call that initialized |
442 | only a few elements. Dereference the pointers only if the format | |
443 | requires this. Then it is ok to fail if the pointers are invalid. */ | |
444 | # define a_wkday \ | |
445 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABDAY_1) + tp->tm_wday)) | |
446 | # define f_wkday \ | |
447 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(DAY_1) + tp->tm_wday)) | |
448 | # define a_month \ | |
449 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABMON_1) + tp->tm_mon)) | |
450 | # define f_month \ | |
451 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(MON_1) + tp->tm_mon)) | |
452 | # define ampm \ | |
1cd4fffc LC |
453 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, tp->tm_hour > 11 \ |
454 | ? NLW(PM_STR) : NLW(AM_STR))) | |
e65fc94b LC |
455 | |
456 | # define aw_len STRLEN (a_wkday) | |
457 | # define am_len STRLEN (a_month) | |
458 | # define ap_len STRLEN (ampm) | |
459 | #endif | |
460 | const char *zone; | |
461 | size_t i = 0; | |
462 | STREAM_OR_CHAR_T *p = s; | |
463 | const CHAR_T *f; | |
464 | #if DO_MULTIBYTE && !defined COMPILE_WIDE | |
465 | const char *format_end = NULL; | |
466 | #endif | |
467 | ||
468 | #if ! defined _LIBC && ! HAVE_RUN_TZSET_TEST | |
469 | /* Solaris 2.5.x and 2.6 tzset sometimes modify the storage returned | |
470 | by localtime. On such systems, we must either use the tzset and | |
471 | localtime wrappers to work around the bug (which sets | |
472 | HAVE_RUN_TZSET_TEST) or make a copy of the structure. */ | |
473 | struct tm copy = *tp; | |
474 | tp = © | |
475 | #endif | |
476 | ||
477 | zone = NULL; | |
478 | #if HAVE_TM_ZONE | |
479 | /* The POSIX test suite assumes that setting | |
480 | the environment variable TZ to a new value before calling strftime() | |
481 | will influence the result (the %Z format) even if the information in | |
482 | TP is computed with a totally different time zone. | |
483 | This is bogus: though POSIX allows bad behavior like this, | |
484 | POSIX does not require it. Do the right thing instead. */ | |
485 | zone = (const char *) tp->tm_zone; | |
486 | #endif | |
487 | #if HAVE_TZNAME | |
488 | if (ut) | |
489 | { | |
490 | if (! (zone && *zone)) | |
1cd4fffc | 491 | zone = "GMT"; |
e65fc94b LC |
492 | } |
493 | else | |
494 | { | |
495 | /* POSIX.1 requires that local time zone information be used as | |
1cd4fffc | 496 | though strftime called tzset. */ |
e65fc94b LC |
497 | # if HAVE_TZSET |
498 | tzset (); | |
499 | # endif | |
500 | } | |
501 | #endif | |
502 | ||
503 | if (hour12 > 12) | |
504 | hour12 -= 12; | |
505 | else | |
506 | if (hour12 == 0) | |
507 | hour12 = 12; | |
508 | ||
509 | for (f = format; *f != '\0'; ++f) | |
510 | { | |
1cd4fffc LC |
511 | int pad = 0; /* Padding for number ('-', '_', or 0). */ |
512 | int modifier; /* Field modifier ('E', 'O', or 0). */ | |
513 | int digits = 0; /* Max digits for numeric format. */ | |
514 | int number_value; /* Numeric value to be printed. */ | |
e65fc94b | 515 | unsigned int u_number_value; /* (unsigned int) number_value. */ |
1cd4fffc | 516 | bool negative_number; /* The number is negative. */ |
e65fc94b | 517 | bool always_output_a_sign; /* +/- should always be output. */ |
1cd4fffc | 518 | int tz_colon_mask; /* Bitmask of where ':' should appear. */ |
e65fc94b LC |
519 | const CHAR_T *subfmt; |
520 | CHAR_T sign_char; | |
521 | CHAR_T *bufp; | |
522 | CHAR_T buf[1 | |
1cd4fffc LC |
523 | + 2 /* for the two colons in a %::z or %:::z time zone */ |
524 | + (sizeof (int) < sizeof (time_t) | |
525 | ? INT_STRLEN_BOUND (time_t) | |
526 | : INT_STRLEN_BOUND (int))]; | |
e65fc94b LC |
527 | int width = -1; |
528 | bool to_lowcase = false; | |
529 | bool to_uppcase = upcase; | |
530 | size_t colons; | |
531 | bool change_case = false; | |
532 | int format_char; | |
533 | ||
534 | #if DO_MULTIBYTE && !defined COMPILE_WIDE | |
535 | switch (*f) | |
1cd4fffc LC |
536 | { |
537 | case L_('%'): | |
538 | break; | |
539 | ||
540 | case L_('\b'): case L_('\t'): case L_('\n'): | |
541 | case L_('\v'): case L_('\f'): case L_('\r'): | |
542 | case L_(' '): case L_('!'): case L_('"'): case L_('#'): case L_('&'): | |
543 | case L_('\''): case L_('('): case L_(')'): case L_('*'): case L_('+'): | |
544 | case L_(','): case L_('-'): case L_('.'): case L_('/'): case L_('0'): | |
545 | case L_('1'): case L_('2'): case L_('3'): case L_('4'): case L_('5'): | |
546 | case L_('6'): case L_('7'): case L_('8'): case L_('9'): case L_(':'): | |
547 | case L_(';'): case L_('<'): case L_('='): case L_('>'): case L_('?'): | |
548 | case L_('A'): case L_('B'): case L_('C'): case L_('D'): case L_('E'): | |
549 | case L_('F'): case L_('G'): case L_('H'): case L_('I'): case L_('J'): | |
550 | case L_('K'): case L_('L'): case L_('M'): case L_('N'): case L_('O'): | |
551 | case L_('P'): case L_('Q'): case L_('R'): case L_('S'): case L_('T'): | |
552 | case L_('U'): case L_('V'): case L_('W'): case L_('X'): case L_('Y'): | |
553 | case L_('Z'): case L_('['): case L_('\\'): case L_(']'): case L_('^'): | |
554 | case L_('_'): case L_('a'): case L_('b'): case L_('c'): case L_('d'): | |
555 | case L_('e'): case L_('f'): case L_('g'): case L_('h'): case L_('i'): | |
556 | case L_('j'): case L_('k'): case L_('l'): case L_('m'): case L_('n'): | |
557 | case L_('o'): case L_('p'): case L_('q'): case L_('r'): case L_('s'): | |
558 | case L_('t'): case L_('u'): case L_('v'): case L_('w'): case L_('x'): | |
559 | case L_('y'): case L_('z'): case L_('{'): case L_('|'): case L_('}'): | |
560 | case L_('~'): | |
561 | /* The C Standard requires these 98 characters (plus '%') to | |
562 | be in the basic execution character set. None of these | |
563 | characters can start a multibyte sequence, so they need | |
564 | not be analyzed further. */ | |
565 | add1 (*f); | |
566 | continue; | |
567 | ||
568 | default: | |
569 | /* Copy this multibyte sequence until we reach its end, find | |
570 | an error, or come back to the initial shift state. */ | |
571 | { | |
572 | mbstate_t mbstate = mbstate_zero; | |
573 | size_t len = 0; | |
574 | size_t fsize; | |
575 | ||
576 | if (! format_end) | |
577 | format_end = f + strlen (f) + 1; | |
578 | fsize = format_end - f; | |
579 | ||
580 | do | |
581 | { | |
582 | size_t bytes = mbrlen (f + len, fsize - len, &mbstate); | |
583 | ||
584 | if (bytes == 0) | |
585 | break; | |
586 | ||
587 | if (bytes == (size_t) -2) | |
588 | { | |
589 | len += strlen (f + len); | |
590 | break; | |
591 | } | |
592 | ||
593 | if (bytes == (size_t) -1) | |
594 | { | |
595 | len++; | |
596 | break; | |
597 | } | |
598 | ||
599 | len += bytes; | |
600 | } | |
601 | while (! mbsinit (&mbstate)); | |
602 | ||
603 | cpy (len, f); | |
604 | f += len - 1; | |
605 | continue; | |
606 | } | |
607 | } | |
e65fc94b LC |
608 | |
609 | #else /* ! DO_MULTIBYTE */ | |
610 | ||
611 | /* Either multibyte encodings are not supported, they are | |
1cd4fffc LC |
612 | safe for formats, so any non-'%' byte can be copied through, |
613 | or this is the wide character version. */ | |
e65fc94b | 614 | if (*f != L_('%')) |
1cd4fffc LC |
615 | { |
616 | add1 (*f); | |
617 | continue; | |
618 | } | |
e65fc94b LC |
619 | |
620 | #endif /* ! DO_MULTIBYTE */ | |
621 | ||
622 | /* Check for flags that can modify a format. */ | |
623 | while (1) | |
1cd4fffc LC |
624 | { |
625 | switch (*++f) | |
626 | { | |
627 | /* This influences the number formats. */ | |
628 | case L_('_'): | |
629 | case L_('-'): | |
630 | case L_('0'): | |
631 | pad = *f; | |
632 | continue; | |
633 | ||
634 | /* This changes textual output. */ | |
635 | case L_('^'): | |
636 | to_uppcase = true; | |
637 | continue; | |
638 | case L_('#'): | |
639 | change_case = true; | |
640 | continue; | |
641 | ||
642 | default: | |
643 | break; | |
644 | } | |
645 | break; | |
646 | } | |
e65fc94b LC |
647 | |
648 | /* As a GNU extension we allow to specify the field width. */ | |
649 | if (ISDIGIT (*f)) | |
1cd4fffc LC |
650 | { |
651 | width = 0; | |
652 | do | |
653 | { | |
654 | if (width > INT_MAX / 10 | |
655 | || (width == INT_MAX / 10 && *f - L_('0') > INT_MAX % 10)) | |
656 | /* Avoid overflow. */ | |
657 | width = INT_MAX; | |
658 | else | |
659 | { | |
660 | width *= 10; | |
661 | width += *f - L_('0'); | |
662 | } | |
663 | ++f; | |
664 | } | |
665 | while (ISDIGIT (*f)); | |
666 | } | |
e65fc94b LC |
667 | |
668 | /* Check for modifiers. */ | |
669 | switch (*f) | |
1cd4fffc LC |
670 | { |
671 | case L_('E'): | |
672 | case L_('O'): | |
673 | modifier = *f++; | |
674 | break; | |
e65fc94b | 675 | |
1cd4fffc LC |
676 | default: |
677 | modifier = 0; | |
678 | break; | |
679 | } | |
e65fc94b LC |
680 | |
681 | /* Now do the specified format. */ | |
682 | format_char = *f; | |
683 | switch (format_char) | |
1cd4fffc | 684 | { |
e65fc94b | 685 | #define DO_NUMBER(d, v) \ |
1cd4fffc LC |
686 | digits = d; \ |
687 | number_value = v; goto do_number | |
e65fc94b | 688 | #define DO_SIGNED_NUMBER(d, negative, v) \ |
1cd4fffc LC |
689 | digits = d; \ |
690 | negative_number = negative; \ | |
691 | u_number_value = v; goto do_signed_number | |
e65fc94b | 692 | |
1cd4fffc LC |
693 | /* The mask is not what you might think. |
694 | When the ordinal i'th bit is set, insert a colon | |
695 | before the i'th digit of the time zone representation. */ | |
e65fc94b | 696 | #define DO_TZ_OFFSET(d, negative, mask, v) \ |
1cd4fffc LC |
697 | digits = d; \ |
698 | negative_number = negative; \ | |
699 | tz_colon_mask = mask; \ | |
700 | u_number_value = v; goto do_tz_offset | |
e65fc94b | 701 | #define DO_NUMBER_SPACEPAD(d, v) \ |
1cd4fffc LC |
702 | digits = d; \ |
703 | number_value = v; goto do_number_spacepad | |
704 | ||
705 | case L_('%'): | |
706 | if (modifier != 0) | |
707 | goto bad_format; | |
708 | add1 (*f); | |
709 | break; | |
710 | ||
711 | case L_('a'): | |
712 | if (modifier != 0) | |
713 | goto bad_format; | |
714 | if (change_case) | |
715 | { | |
716 | to_uppcase = true; | |
717 | to_lowcase = false; | |
718 | } | |
e65fc94b | 719 | #ifdef _NL_CURRENT |
1cd4fffc LC |
720 | cpy (aw_len, a_wkday); |
721 | break; | |
e65fc94b | 722 | #else |
1cd4fffc | 723 | goto underlying_strftime; |
e65fc94b LC |
724 | #endif |
725 | ||
1cd4fffc LC |
726 | case 'A': |
727 | if (modifier != 0) | |
728 | goto bad_format; | |
729 | if (change_case) | |
730 | { | |
731 | to_uppcase = true; | |
732 | to_lowcase = false; | |
733 | } | |
e65fc94b | 734 | #ifdef _NL_CURRENT |
1cd4fffc LC |
735 | cpy (STRLEN (f_wkday), f_wkday); |
736 | break; | |
e65fc94b | 737 | #else |
1cd4fffc | 738 | goto underlying_strftime; |
e65fc94b LC |
739 | #endif |
740 | ||
1cd4fffc LC |
741 | case L_('b'): |
742 | case L_('h'): | |
743 | if (change_case) | |
744 | { | |
745 | to_uppcase = true; | |
746 | to_lowcase = false; | |
747 | } | |
748 | if (modifier != 0) | |
749 | goto bad_format; | |
e65fc94b | 750 | #ifdef _NL_CURRENT |
1cd4fffc LC |
751 | cpy (am_len, a_month); |
752 | break; | |
e65fc94b | 753 | #else |
1cd4fffc | 754 | goto underlying_strftime; |
e65fc94b LC |
755 | #endif |
756 | ||
1cd4fffc LC |
757 | case L_('B'): |
758 | if (modifier != 0) | |
759 | goto bad_format; | |
760 | if (change_case) | |
761 | { | |
762 | to_uppcase = true; | |
763 | to_lowcase = false; | |
764 | } | |
e65fc94b | 765 | #ifdef _NL_CURRENT |
1cd4fffc LC |
766 | cpy (STRLEN (f_month), f_month); |
767 | break; | |
e65fc94b | 768 | #else |
1cd4fffc | 769 | goto underlying_strftime; |
e65fc94b LC |
770 | #endif |
771 | ||
1cd4fffc LC |
772 | case L_('c'): |
773 | if (modifier == L_('O')) | |
774 | goto bad_format; | |
e65fc94b | 775 | #ifdef _NL_CURRENT |
1cd4fffc LC |
776 | if (! (modifier == 'E' |
777 | && (*(subfmt = | |
778 | (const CHAR_T *) _NL_CURRENT (LC_TIME, | |
779 | NLW(ERA_D_T_FMT))) | |
780 | != '\0'))) | |
781 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_T_FMT)); | |
e65fc94b | 782 | #else |
1cd4fffc | 783 | goto underlying_strftime; |
e65fc94b LC |
784 | #endif |
785 | ||
1cd4fffc LC |
786 | subformat: |
787 | { | |
788 | size_t len = strftime_case_ (to_uppcase, | |
789 | NULL, STRFTIME_ARG ((size_t) -1) | |
790 | subfmt, | |
791 | tp extra_args LOCALE_ARG); | |
792 | add (len, strftime_case_ (to_uppcase, p, | |
793 | STRFTIME_ARG (maxsize - i) | |
794 | subfmt, | |
795 | tp extra_args LOCALE_ARG)); | |
796 | } | |
797 | break; | |
e65fc94b LC |
798 | |
799 | #if !(defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY) | |
1cd4fffc LC |
800 | underlying_strftime: |
801 | { | |
802 | /* The relevant information is available only via the | |
803 | underlying strftime implementation, so use that. */ | |
804 | char ufmt[5]; | |
805 | char *u = ufmt; | |
806 | char ubuf[1024]; /* enough for any single format in practice */ | |
807 | size_t len; | |
808 | /* Make sure we're calling the actual underlying strftime. | |
809 | In some cases, config.h contains something like | |
810 | "#define strftime rpl_strftime". */ | |
e65fc94b LC |
811 | # ifdef strftime |
812 | # undef strftime | |
1cd4fffc | 813 | size_t strftime (); |
e65fc94b LC |
814 | # endif |
815 | ||
1cd4fffc LC |
816 | /* The space helps distinguish strftime failure from empty |
817 | output. */ | |
818 | *u++ = ' '; | |
819 | *u++ = '%'; | |
820 | if (modifier != 0) | |
821 | *u++ = modifier; | |
822 | *u++ = format_char; | |
823 | *u = '\0'; | |
824 | len = strftime (ubuf, sizeof ubuf, ufmt, tp); | |
825 | if (len != 0) | |
826 | cpy (len - 1, ubuf + 1); | |
827 | } | |
828 | break; | |
e65fc94b LC |
829 | #endif |
830 | ||
1cd4fffc LC |
831 | case L_('C'): |
832 | if (modifier == L_('O')) | |
833 | goto bad_format; | |
834 | if (modifier == L_('E')) | |
835 | { | |
e65fc94b | 836 | #if HAVE_STRUCT_ERA_ENTRY |
1cd4fffc LC |
837 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); |
838 | if (era) | |
839 | { | |
e65fc94b | 840 | # ifdef COMPILE_WIDE |
1cd4fffc LC |
841 | size_t len = __wcslen (era->era_wname); |
842 | cpy (len, era->era_wname); | |
e65fc94b | 843 | # else |
1cd4fffc LC |
844 | size_t len = strlen (era->era_name); |
845 | cpy (len, era->era_name); | |
e65fc94b | 846 | # endif |
1cd4fffc LC |
847 | break; |
848 | } | |
e65fc94b | 849 | #else |
1cd4fffc | 850 | goto underlying_strftime; |
e65fc94b | 851 | #endif |
1cd4fffc | 852 | } |
e65fc94b | 853 | |
1cd4fffc LC |
854 | { |
855 | int century = tp->tm_year / 100 + TM_YEAR_BASE / 100; | |
856 | century -= tp->tm_year % 100 < 0 && 0 < century; | |
857 | DO_SIGNED_NUMBER (2, tp->tm_year < - TM_YEAR_BASE, century); | |
858 | } | |
e65fc94b | 859 | |
1cd4fffc LC |
860 | case L_('x'): |
861 | if (modifier == L_('O')) | |
862 | goto bad_format; | |
e65fc94b | 863 | #ifdef _NL_CURRENT |
1cd4fffc LC |
864 | if (! (modifier == L_('E') |
865 | && (*(subfmt = | |
866 | (const CHAR_T *)_NL_CURRENT (LC_TIME, NLW(ERA_D_FMT))) | |
867 | != L_('\0')))) | |
868 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_FMT)); | |
869 | goto subformat; | |
e65fc94b | 870 | #else |
1cd4fffc | 871 | goto underlying_strftime; |
e65fc94b | 872 | #endif |
1cd4fffc LC |
873 | case L_('D'): |
874 | if (modifier != 0) | |
875 | goto bad_format; | |
876 | subfmt = L_("%m/%d/%y"); | |
877 | goto subformat; | |
878 | ||
879 | case L_('d'): | |
880 | if (modifier == L_('E')) | |
881 | goto bad_format; | |
882 | ||
883 | DO_NUMBER (2, tp->tm_mday); | |
884 | ||
885 | case L_('e'): | |
886 | if (modifier == L_('E')) | |
887 | goto bad_format; | |
888 | ||
889 | DO_NUMBER_SPACEPAD (2, tp->tm_mday); | |
890 | ||
891 | /* All numeric formats set DIGITS and NUMBER_VALUE (or U_NUMBER_VALUE) | |
892 | and then jump to one of these labels. */ | |
893 | ||
894 | do_tz_offset: | |
895 | always_output_a_sign = true; | |
896 | goto do_number_body; | |
897 | ||
898 | do_number_spacepad: | |
f0007cad | 899 | /* Force '_' flag unless overridden by '0' or '-' flag. */ |
1cd4fffc LC |
900 | if (pad != L_('0') && pad != L_('-')) |
901 | pad = L_('_'); | |
902 | ||
903 | do_number: | |
904 | /* Format NUMBER_VALUE according to the MODIFIER flag. */ | |
905 | negative_number = number_value < 0; | |
906 | u_number_value = number_value; | |
907 | ||
908 | do_signed_number: | |
909 | always_output_a_sign = false; | |
910 | tz_colon_mask = 0; | |
911 | ||
912 | do_number_body: | |
913 | /* Format U_NUMBER_VALUE according to the MODIFIER flag. | |
914 | NEGATIVE_NUMBER is nonzero if the original number was | |
915 | negative; in this case it was converted directly to | |
916 | unsigned int (i.e., modulo (UINT_MAX + 1)) without | |
917 | negating it. */ | |
918 | if (modifier == L_('O') && !negative_number) | |
919 | { | |
e65fc94b | 920 | #ifdef _NL_CURRENT |
1cd4fffc LC |
921 | /* Get the locale specific alternate representation of |
922 | the number. If none exist NULL is returned. */ | |
923 | const CHAR_T *cp = nl_get_alt_digit (u_number_value | |
924 | HELPER_LOCALE_ARG); | |
925 | ||
926 | if (cp != NULL) | |
927 | { | |
928 | size_t digitlen = STRLEN (cp); | |
929 | if (digitlen != 0) | |
930 | { | |
931 | cpy (digitlen, cp); | |
932 | break; | |
933 | } | |
934 | } | |
e65fc94b | 935 | #else |
1cd4fffc | 936 | goto underlying_strftime; |
e65fc94b | 937 | #endif |
1cd4fffc LC |
938 | } |
939 | ||
940 | bufp = buf + sizeof (buf) / sizeof (buf[0]); | |
941 | ||
942 | if (negative_number) | |
943 | u_number_value = - u_number_value; | |
944 | ||
945 | do | |
946 | { | |
947 | if (tz_colon_mask & 1) | |
948 | *--bufp = ':'; | |
949 | tz_colon_mask >>= 1; | |
950 | *--bufp = u_number_value % 10 + L_('0'); | |
951 | u_number_value /= 10; | |
952 | } | |
953 | while (u_number_value != 0 || tz_colon_mask != 0); | |
954 | ||
955 | do_number_sign_and_padding: | |
956 | if (digits < width) | |
957 | digits = width; | |
958 | ||
959 | sign_char = (negative_number ? L_('-') | |
960 | : always_output_a_sign ? L_('+') | |
961 | : 0); | |
962 | ||
963 | if (pad == L_('-')) | |
964 | { | |
965 | if (sign_char) | |
966 | add1 (sign_char); | |
967 | } | |
968 | else | |
969 | { | |
970 | int padding = digits - (buf + (sizeof (buf) / sizeof (buf[0])) | |
971 | - bufp) - !!sign_char; | |
972 | ||
973 | if (padding > 0) | |
974 | { | |
975 | if (pad == L_('_')) | |
976 | { | |
977 | if ((size_t) padding >= maxsize - i) | |
978 | return 0; | |
979 | ||
980 | if (p) | |
981 | memset_space (p, padding); | |
982 | i += padding; | |
983 | width = width > padding ? width - padding : 0; | |
984 | if (sign_char) | |
985 | add1 (sign_char); | |
986 | } | |
987 | else | |
988 | { | |
989 | if ((size_t) digits >= maxsize - i) | |
990 | return 0; | |
991 | ||
992 | if (sign_char) | |
993 | add1 (sign_char); | |
994 | ||
995 | if (p) | |
996 | memset_zero (p, padding); | |
997 | i += padding; | |
998 | width = 0; | |
999 | } | |
1000 | } | |
1001 | else | |
1002 | { | |
1003 | if (sign_char) | |
1004 | add1 (sign_char); | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | cpy (buf + sizeof (buf) / sizeof (buf[0]) - bufp, bufp); | |
1009 | break; | |
1010 | ||
1011 | case L_('F'): | |
1012 | if (modifier != 0) | |
1013 | goto bad_format; | |
1014 | subfmt = L_("%Y-%m-%d"); | |
1015 | goto subformat; | |
1016 | ||
1017 | case L_('H'): | |
1018 | if (modifier == L_('E')) | |
1019 | goto bad_format; | |
1020 | ||
1021 | DO_NUMBER (2, tp->tm_hour); | |
1022 | ||
1023 | case L_('I'): | |
1024 | if (modifier == L_('E')) | |
1025 | goto bad_format; | |
1026 | ||
1027 | DO_NUMBER (2, hour12); | |
1028 | ||
1029 | case L_('k'): /* GNU extension. */ | |
1030 | if (modifier == L_('E')) | |
1031 | goto bad_format; | |
1032 | ||
1033 | DO_NUMBER_SPACEPAD (2, tp->tm_hour); | |
1034 | ||
1035 | case L_('l'): /* GNU extension. */ | |
1036 | if (modifier == L_('E')) | |
1037 | goto bad_format; | |
1038 | ||
1039 | DO_NUMBER_SPACEPAD (2, hour12); | |
1040 | ||
1041 | case L_('j'): | |
1042 | if (modifier == L_('E')) | |
1043 | goto bad_format; | |
1044 | ||
1045 | DO_SIGNED_NUMBER (3, tp->tm_yday < -1, tp->tm_yday + 1U); | |
1046 | ||
1047 | case L_('M'): | |
1048 | if (modifier == L_('E')) | |
1049 | goto bad_format; | |
1050 | ||
1051 | DO_NUMBER (2, tp->tm_min); | |
1052 | ||
1053 | case L_('m'): | |
1054 | if (modifier == L_('E')) | |
1055 | goto bad_format; | |
1056 | ||
1057 | DO_SIGNED_NUMBER (2, tp->tm_mon < -1, tp->tm_mon + 1U); | |
e65fc94b LC |
1058 | |
1059 | #ifndef _LIBC | |
1cd4fffc LC |
1060 | case L_('N'): /* GNU extension. */ |
1061 | if (modifier == L_('E')) | |
1062 | goto bad_format; | |
1063 | ||
1064 | number_value = ns; | |
1065 | if (width == -1) | |
1066 | width = 9; | |
1067 | else | |
1068 | { | |
1069 | /* Take an explicit width less than 9 as a precision. */ | |
1070 | int j; | |
1071 | for (j = width; j < 9; j++) | |
1072 | number_value /= 10; | |
1073 | } | |
1074 | ||
1075 | DO_NUMBER (width, number_value); | |
e65fc94b LC |
1076 | #endif |
1077 | ||
1cd4fffc LC |
1078 | case L_('n'): |
1079 | add1 (L_('\n')); | |
1080 | break; | |
e65fc94b | 1081 | |
1cd4fffc LC |
1082 | case L_('P'): |
1083 | to_lowcase = true; | |
e65fc94b | 1084 | #ifndef _NL_CURRENT |
1cd4fffc | 1085 | format_char = L_('p'); |
e65fc94b | 1086 | #endif |
1cd4fffc LC |
1087 | /* FALLTHROUGH */ |
1088 | ||
1089 | case L_('p'): | |
1090 | if (change_case) | |
1091 | { | |
1092 | to_uppcase = false; | |
1093 | to_lowcase = true; | |
1094 | } | |
e65fc94b | 1095 | #ifdef _NL_CURRENT |
1cd4fffc LC |
1096 | cpy (ap_len, ampm); |
1097 | break; | |
e65fc94b | 1098 | #else |
1cd4fffc | 1099 | goto underlying_strftime; |
e65fc94b LC |
1100 | #endif |
1101 | ||
1cd4fffc LC |
1102 | case L_('R'): |
1103 | subfmt = L_("%H:%M"); | |
1104 | goto subformat; | |
e65fc94b | 1105 | |
1cd4fffc | 1106 | case L_('r'): |
e65fc94b | 1107 | #ifdef _NL_CURRENT |
1cd4fffc LC |
1108 | if (*(subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, |
1109 | NLW(T_FMT_AMPM))) | |
1110 | == L_('\0')) | |
1111 | subfmt = L_("%I:%M:%S %p"); | |
1112 | goto subformat; | |
e65fc94b | 1113 | #else |
1cd4fffc | 1114 | goto underlying_strftime; |
e65fc94b LC |
1115 | #endif |
1116 | ||
1cd4fffc LC |
1117 | case L_('S'): |
1118 | if (modifier == L_('E')) | |
1119 | goto bad_format; | |
e65fc94b | 1120 | |
1cd4fffc | 1121 | DO_NUMBER (2, tp->tm_sec); |
e65fc94b | 1122 | |
1cd4fffc LC |
1123 | case L_('s'): /* GNU extension. */ |
1124 | { | |
1125 | struct tm ltm; | |
1126 | time_t t; | |
e65fc94b | 1127 | |
1cd4fffc LC |
1128 | ltm = *tp; |
1129 | t = mktime (<m); | |
e65fc94b | 1130 | |
1cd4fffc LC |
1131 | /* Generate string value for T using time_t arithmetic; |
1132 | this works even if sizeof (long) < sizeof (time_t). */ | |
e65fc94b | 1133 | |
1cd4fffc LC |
1134 | bufp = buf + sizeof (buf) / sizeof (buf[0]); |
1135 | negative_number = t < 0; | |
e65fc94b | 1136 | |
1cd4fffc LC |
1137 | do |
1138 | { | |
1139 | int d = t % 10; | |
1140 | t /= 10; | |
1141 | *--bufp = (negative_number ? -d : d) + L_('0'); | |
1142 | } | |
1143 | while (t != 0); | |
e65fc94b | 1144 | |
1cd4fffc LC |
1145 | digits = 1; |
1146 | always_output_a_sign = false; | |
1147 | goto do_number_sign_and_padding; | |
1148 | } | |
e65fc94b | 1149 | |
1cd4fffc LC |
1150 | case L_('X'): |
1151 | if (modifier == L_('O')) | |
1152 | goto bad_format; | |
e65fc94b | 1153 | #ifdef _NL_CURRENT |
1cd4fffc LC |
1154 | if (! (modifier == L_('E') |
1155 | && (*(subfmt = | |
1156 | (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ERA_T_FMT))) | |
1157 | != L_('\0')))) | |
1158 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(T_FMT)); | |
1159 | goto subformat; | |
e65fc94b | 1160 | #else |
1cd4fffc | 1161 | goto underlying_strftime; |
e65fc94b | 1162 | #endif |
1cd4fffc LC |
1163 | case L_('T'): |
1164 | subfmt = L_("%H:%M:%S"); | |
1165 | goto subformat; | |
1166 | ||
1167 | case L_('t'): | |
1168 | add1 (L_('\t')); | |
1169 | break; | |
1170 | ||
1171 | case L_('u'): | |
1172 | DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1); | |
1173 | ||
1174 | case L_('U'): | |
1175 | if (modifier == L_('E')) | |
1176 | goto bad_format; | |
1177 | ||
1178 | DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7); | |
1179 | ||
1180 | case L_('V'): | |
1181 | case L_('g'): | |
1182 | case L_('G'): | |
1183 | if (modifier == L_('E')) | |
1184 | goto bad_format; | |
1185 | { | |
1186 | /* YEAR is a leap year if and only if (tp->tm_year + TM_YEAR_BASE) | |
1187 | is a leap year, except that YEAR and YEAR - 1 both work | |
1188 | correctly even when (tp->tm_year + TM_YEAR_BASE) would | |
1189 | overflow. */ | |
1190 | int year = (tp->tm_year | |
1191 | + (tp->tm_year < 0 | |
1192 | ? TM_YEAR_BASE % 400 | |
1193 | : TM_YEAR_BASE % 400 - 400)); | |
1194 | int year_adjust = 0; | |
1195 | int days = iso_week_days (tp->tm_yday, tp->tm_wday); | |
1196 | ||
1197 | if (days < 0) | |
1198 | { | |
1199 | /* This ISO week belongs to the previous year. */ | |
1200 | year_adjust = -1; | |
1201 | days = iso_week_days (tp->tm_yday + (365 + __isleap (year - 1)), | |
1202 | tp->tm_wday); | |
1203 | } | |
1204 | else | |
1205 | { | |
1206 | int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)), | |
1207 | tp->tm_wday); | |
1208 | if (0 <= d) | |
1209 | { | |
1210 | /* This ISO week belongs to the next year. */ | |
1211 | year_adjust = 1; | |
1212 | days = d; | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | switch (*f) | |
1217 | { | |
1218 | case L_('g'): | |
1219 | { | |
1220 | int yy = (tp->tm_year % 100 + year_adjust) % 100; | |
1221 | DO_NUMBER (2, (0 <= yy | |
1222 | ? yy | |
1223 | : tp->tm_year < -TM_YEAR_BASE - year_adjust | |
1224 | ? -yy | |
1225 | : yy + 100)); | |
1226 | } | |
1227 | ||
1228 | case L_('G'): | |
1229 | DO_SIGNED_NUMBER (4, tp->tm_year < -TM_YEAR_BASE - year_adjust, | |
1230 | (tp->tm_year + (unsigned int) TM_YEAR_BASE | |
1231 | + year_adjust)); | |
1232 | ||
1233 | default: | |
1234 | DO_NUMBER (2, days / 7 + 1); | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | case L_('W'): | |
1239 | if (modifier == L_('E')) | |
1240 | goto bad_format; | |
1241 | ||
1242 | DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7); | |
1243 | ||
1244 | case L_('w'): | |
1245 | if (modifier == L_('E')) | |
1246 | goto bad_format; | |
1247 | ||
1248 | DO_NUMBER (1, tp->tm_wday); | |
1249 | ||
1250 | case L_('Y'): | |
1251 | if (modifier == 'E') | |
1252 | { | |
e65fc94b | 1253 | #if HAVE_STRUCT_ERA_ENTRY |
1cd4fffc LC |
1254 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); |
1255 | if (era) | |
1256 | { | |
e65fc94b | 1257 | # ifdef COMPILE_WIDE |
1cd4fffc | 1258 | subfmt = era->era_wformat; |
e65fc94b | 1259 | # else |
1cd4fffc | 1260 | subfmt = era->era_format; |
e65fc94b | 1261 | # endif |
1cd4fffc LC |
1262 | goto subformat; |
1263 | } | |
e65fc94b | 1264 | #else |
1cd4fffc | 1265 | goto underlying_strftime; |
e65fc94b | 1266 | #endif |
1cd4fffc LC |
1267 | } |
1268 | if (modifier == L_('O')) | |
1269 | goto bad_format; | |
1270 | else | |
1271 | DO_SIGNED_NUMBER (4, tp->tm_year < -TM_YEAR_BASE, | |
1272 | tp->tm_year + (unsigned int) TM_YEAR_BASE); | |
1273 | ||
1274 | case L_('y'): | |
1275 | if (modifier == L_('E')) | |
1276 | { | |
e65fc94b | 1277 | #if HAVE_STRUCT_ERA_ENTRY |
1cd4fffc LC |
1278 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); |
1279 | if (era) | |
1280 | { | |
1281 | int delta = tp->tm_year - era->start_date[0]; | |
1282 | DO_NUMBER (1, (era->offset | |
1283 | + delta * era->absolute_direction)); | |
1284 | } | |
e65fc94b | 1285 | #else |
1cd4fffc | 1286 | goto underlying_strftime; |
e65fc94b | 1287 | #endif |
1cd4fffc LC |
1288 | } |
1289 | ||
1290 | { | |
1291 | int yy = tp->tm_year % 100; | |
1292 | if (yy < 0) | |
1293 | yy = tp->tm_year < - TM_YEAR_BASE ? -yy : yy + 100; | |
1294 | DO_NUMBER (2, yy); | |
1295 | } | |
1296 | ||
1297 | case L_('Z'): | |
1298 | if (change_case) | |
1299 | { | |
1300 | to_uppcase = false; | |
1301 | to_lowcase = true; | |
1302 | } | |
e65fc94b LC |
1303 | |
1304 | #if HAVE_TZNAME | |
1cd4fffc LC |
1305 | /* The tzset() call might have changed the value. */ |
1306 | if (!(zone && *zone) && tp->tm_isdst >= 0) | |
1307 | zone = tzname[tp->tm_isdst != 0]; | |
e65fc94b | 1308 | #endif |
1cd4fffc LC |
1309 | if (! zone) |
1310 | zone = ""; | |
e65fc94b LC |
1311 | |
1312 | #ifdef COMPILE_WIDE | |
1cd4fffc LC |
1313 | { |
1314 | /* The zone string is always given in multibyte form. We have | |
1315 | to transform it first. */ | |
1316 | wchar_t *wczone; | |
1317 | size_t len; | |
1318 | widen (zone, wczone, len); | |
1319 | cpy (len, wczone); | |
1320 | } | |
e65fc94b | 1321 | #else |
1cd4fffc | 1322 | cpy (strlen (zone), zone); |
e65fc94b | 1323 | #endif |
1cd4fffc LC |
1324 | break; |
1325 | ||
1326 | case L_(':'): | |
1327 | /* :, ::, and ::: are valid only just before 'z'. | |
1328 | :::: etc. are rejected later. */ | |
1329 | for (colons = 1; f[colons] == L_(':'); colons++) | |
1330 | continue; | |
1331 | if (f[colons] != L_('z')) | |
1332 | goto bad_format; | |
1333 | f += colons; | |
1334 | goto do_z_conversion; | |
1335 | ||
1336 | case L_('z'): | |
1337 | colons = 0; | |
1338 | ||
1339 | do_z_conversion: | |
1340 | if (tp->tm_isdst < 0) | |
1341 | break; | |
1342 | ||
1343 | { | |
1344 | int diff; | |
1345 | int hour_diff; | |
1346 | int min_diff; | |
1347 | int sec_diff; | |
e65fc94b | 1348 | #if HAVE_TM_GMTOFF |
1cd4fffc | 1349 | diff = tp->tm_gmtoff; |
e65fc94b | 1350 | #else |
1cd4fffc LC |
1351 | if (ut) |
1352 | diff = 0; | |
1353 | else | |
1354 | { | |
1355 | struct tm gtm; | |
1356 | struct tm ltm; | |
1357 | time_t lt; | |
1358 | ||
1359 | ltm = *tp; | |
1360 | lt = mktime (<m); | |
1361 | ||
1362 | if (lt == (time_t) -1) | |
1363 | { | |
1364 | /* mktime returns -1 for errors, but -1 is also a | |
1365 | valid time_t value. Check whether an error really | |
1366 | occurred. */ | |
1367 | struct tm tm; | |
1368 | ||
1369 | if (! __localtime_r (<, &tm) | |
1370 | || ((ltm.tm_sec ^ tm.tm_sec) | |
1371 | | (ltm.tm_min ^ tm.tm_min) | |
1372 | | (ltm.tm_hour ^ tm.tm_hour) | |
1373 | | (ltm.tm_mday ^ tm.tm_mday) | |
1374 | | (ltm.tm_mon ^ tm.tm_mon) | |
1375 | | (ltm.tm_year ^ tm.tm_year))) | |
1376 | break; | |
1377 | } | |
1378 | ||
1379 | if (! __gmtime_r (<, >m)) | |
1380 | break; | |
1381 | ||
1382 | diff = tm_diff (<m, >m); | |
1383 | } | |
e65fc94b LC |
1384 | #endif |
1385 | ||
1cd4fffc LC |
1386 | hour_diff = diff / 60 / 60; |
1387 | min_diff = diff / 60 % 60; | |
1388 | sec_diff = diff % 60; | |
1389 | ||
1390 | switch (colons) | |
1391 | { | |
1392 | case 0: /* +hhmm */ | |
1393 | DO_TZ_OFFSET (5, diff < 0, 0, hour_diff * 100 + min_diff); | |
1394 | ||
1395 | case 1: tz_hh_mm: /* +hh:mm */ | |
1396 | DO_TZ_OFFSET (6, diff < 0, 04, hour_diff * 100 + min_diff); | |
1397 | ||
1398 | case 2: tz_hh_mm_ss: /* +hh:mm:ss */ | |
1399 | DO_TZ_OFFSET (9, diff < 0, 024, | |
1400 | hour_diff * 10000 + min_diff * 100 + sec_diff); | |
1401 | ||
1402 | case 3: /* +hh if possible, else +hh:mm, else +hh:mm:ss */ | |
1403 | if (sec_diff != 0) | |
1404 | goto tz_hh_mm_ss; | |
1405 | if (min_diff != 0) | |
1406 | goto tz_hh_mm; | |
1407 | DO_TZ_OFFSET (3, diff < 0, 0, hour_diff); | |
1408 | ||
1409 | default: | |
1410 | goto bad_format; | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | case L_('\0'): /* GNU extension: % at end of format. */ | |
1415 | --f; | |
1416 | /* Fall through. */ | |
1417 | default: | |
1418 | /* Unknown format; output the format, including the '%', | |
1419 | since this is most likely the right thing to do if a | |
1420 | multibyte string has been misparsed. */ | |
1421 | bad_format: | |
1422 | { | |
1423 | int flen; | |
1424 | for (flen = 1; f[1 - flen] != L_('%'); flen++) | |
1425 | continue; | |
1426 | cpy (flen, &f[1 - flen]); | |
1427 | } | |
1428 | break; | |
1429 | } | |
e65fc94b LC |
1430 | } |
1431 | ||
1432 | #if ! FPRINTFTIME | |
1433 | if (p && maxsize != 0) | |
1434 | *p = L_('\0'); | |
1435 | #endif | |
1436 | ||
1437 | return i; | |
1438 | } | |
1439 | ||
1440 | /* Write information from TP into S according to the format | |
1441 | string FORMAT, writing no more that MAXSIZE characters | |
1442 | (including the terminating '\0') and returning number of | |
1443 | characters written. If S is NULL, nothing will be written | |
1444 | anywhere, so to determine how many characters would be | |
1445 | written, use NULL for S and (size_t) -1 for MAXSIZE. */ | |
1446 | size_t | |
1447 | my_strftime (STREAM_OR_CHAR_T *s, STRFTIME_ARG (size_t maxsize) | |
1cd4fffc LC |
1448 | const CHAR_T *format, |
1449 | const struct tm *tp extra_args_spec LOCALE_PARAM_PROTO) | |
e65fc94b LC |
1450 | { |
1451 | return strftime_case_ (false, s, STRFTIME_ARG (maxsize) | |
1cd4fffc | 1452 | format, tp extra_args LOCALE_ARG); |
e65fc94b LC |
1453 | } |
1454 | ||
1455 | #if defined _LIBC && ! FPRINTFTIME | |
1456 | libc_hidden_def (my_strftime) | |
1457 | #endif | |
1458 | ||
1459 | ||
1460 | #if defined emacs && ! FPRINTFTIME | |
1461 | /* For Emacs we have a separate interface which corresponds to the normal | |
1462 | strftime function plus the ut argument, but without the ns argument. */ | |
1463 | size_t | |
1464 | emacs_strftimeu (char *s, size_t maxsize, const char *format, | |
1cd4fffc | 1465 | const struct tm *tp, int ut) |
e65fc94b LC |
1466 | { |
1467 | return my_strftime (s, maxsize, format, tp, ut, 0); | |
1468 | } | |
1469 | #endif |