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f240aacb | 1 | /* Copyright (C) 1991-1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2009 Free Software |
e65fc94b LC |
2 | Foundation, Inc. |
3 | ||
4 | NOTE: The canonical source of this file is maintained with the GNU C Library. | |
5 | Bugs can be reported to bug-glibc@prep.ai.mit.edu. | |
6 | ||
7 | This program is free software: you can redistribute it and/or modify | |
8 | it under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #ifdef _LIBC | |
e65fc94b LC |
21 | # define HAVE_STRUCT_ERA_ENTRY 1 |
22 | # define HAVE_TM_GMTOFF 1 | |
23 | # define HAVE_TM_ZONE 1 | |
24 | # define HAVE_TZNAME 1 | |
25 | # define HAVE_TZSET 1 | |
e65fc94b LC |
26 | # include "../locale/localeinfo.h" |
27 | #else | |
28 | # include <config.h> | |
29 | # if FPRINTFTIME | |
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. | |
51 | But this does not hold for the DEC-HANYU encoding used on OSF/1. */ | |
52 | #if !defined __osf__ | |
53 | # define MULTIBYTE_IS_FORMAT_SAFE 1 | |
54 | #endif | |
55 | #define DO_MULTIBYTE (! MULTIBYTE_IS_FORMAT_SAFE) | |
e65fc94b LC |
56 | |
57 | #if DO_MULTIBYTE | |
4a462e35 | 58 | # include <wchar.h> |
e65fc94b LC |
59 | static const mbstate_t mbstate_zero; |
60 | #endif | |
61 | ||
62 | #include <limits.h> | |
63 | #include <stdbool.h> | |
64 | #include <stddef.h> | |
65 | #include <stdlib.h> | |
66 | #include <string.h> | |
67 | ||
68 | #ifdef COMPILE_WIDE | |
69 | # include <endian.h> | |
70 | # define CHAR_T wchar_t | |
71 | # define UCHAR_T unsigned int | |
72 | # define L_(Str) L##Str | |
73 | # define NLW(Sym) _NL_W##Sym | |
74 | ||
75 | # define MEMCPY(d, s, n) __wmemcpy (d, s, n) | |
76 | # define STRLEN(s) __wcslen (s) | |
77 | ||
78 | #else | |
79 | # define CHAR_T char | |
80 | # define UCHAR_T unsigned char | |
81 | # define L_(Str) Str | |
82 | # define NLW(Sym) Sym | |
83 | ||
84 | # define MEMCPY(d, s, n) memcpy (d, s, n) | |
85 | # define STRLEN(s) strlen (s) | |
86 | ||
e65fc94b LC |
87 | #endif |
88 | ||
89 | /* Shift A right by B bits portably, by dividing A by 2**B and | |
90 | truncating towards minus infinity. A and B should be free of side | |
91 | effects, and B should be in the range 0 <= B <= INT_BITS - 2, where | |
92 | INT_BITS is the number of useful bits in an int. GNU code can | |
93 | assume that INT_BITS is at least 32. | |
94 | ||
95 | ISO C99 says that A >> B is implementation-defined if A < 0. Some | |
96 | implementations (e.g., UNICOS 9.0 on a Cray Y-MP EL) don't shift | |
97 | right in the usual way when A < 0, so SHR falls back on division if | |
98 | ordinary A >> B doesn't seem to be the usual signed shift. */ | |
99 | #define SHR(a, b) \ | |
100 | (-1 >> 1 == -1 \ | |
101 | ? (a) >> (b) \ | |
102 | : (a) / (1 << (b)) - ((a) % (1 << (b)) < 0)) | |
103 | ||
104 | /* Bound on length of the string representing an integer type or expression T. | |
105 | Subtract 1 for the sign bit if t is signed; log10 (2.0) < 146/485; | |
106 | add 1 for integer division truncation; add 1 more for a minus sign | |
107 | if needed. */ | |
108 | #define INT_STRLEN_BOUND(t) \ | |
109 | ((sizeof (t) * CHAR_BIT - 1) * 146 / 485 + 2) | |
110 | ||
111 | #define TM_YEAR_BASE 1900 | |
112 | ||
113 | #ifndef __isleap | |
114 | /* Nonzero if YEAR is a leap year (every 4 years, | |
115 | except every 100th isn't, and every 400th is). */ | |
116 | # define __isleap(year) \ | |
117 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) | |
118 | #endif | |
119 | ||
120 | ||
121 | #ifdef _LIBC | |
122 | # define tzname __tzname | |
123 | # define tzset __tzset | |
124 | #endif | |
125 | ||
126 | #if !HAVE_TM_GMTOFF | |
127 | /* Portable standalone applications should supply a "time.h" that | |
128 | declares a POSIX-compliant localtime_r, for the benefit of older | |
129 | implementations that lack localtime_r or have a nonstandard one. | |
130 | See the gnulib time_r module for one way to implement this. */ | |
131 | # undef __gmtime_r | |
132 | # undef __localtime_r | |
133 | # define __gmtime_r gmtime_r | |
134 | # define __localtime_r localtime_r | |
135 | #endif | |
136 | ||
137 | ||
138 | #ifndef FPRINTFTIME | |
139 | # define FPRINTFTIME 0 | |
140 | #endif | |
141 | ||
142 | #if FPRINTFTIME | |
143 | # define STREAM_OR_CHAR_T FILE | |
144 | # define STRFTIME_ARG(x) /* empty */ | |
145 | #else | |
146 | # define STREAM_OR_CHAR_T CHAR_T | |
147 | # define STRFTIME_ARG(x) x, | |
148 | #endif | |
149 | ||
150 | #if FPRINTFTIME | |
151 | # define memset_byte(P, Len, Byte) \ | |
152 | do { size_t _i; for (_i = 0; _i < Len; _i++) fputc (Byte, P); } while (0) | |
153 | # define memset_space(P, Len) memset_byte (P, Len, ' ') | |
154 | # define memset_zero(P, Len) memset_byte (P, Len, '0') | |
155 | #elif defined COMPILE_WIDE | |
156 | # define memset_space(P, Len) (wmemset (P, L' ', Len), (P) += (Len)) | |
157 | # define memset_zero(P, Len) (wmemset (P, L'0', Len), (P) += (Len)) | |
158 | #else | |
159 | # define memset_space(P, Len) (memset (P, ' ', Len), (P) += (Len)) | |
160 | # define memset_zero(P, Len) (memset (P, '0', Len), (P) += (Len)) | |
161 | #endif | |
162 | ||
163 | #if FPRINTFTIME | |
164 | # define advance(P, N) | |
165 | #else | |
166 | # define advance(P, N) ((P) += (N)) | |
167 | #endif | |
168 | ||
169 | #define add(n, f) \ | |
170 | do \ | |
171 | { \ | |
172 | int _n = (n); \ | |
173 | int _delta = width - _n; \ | |
174 | int _incr = _n + (_delta > 0 ? _delta : 0); \ | |
175 | if ((size_t) _incr >= maxsize - i) \ | |
176 | return 0; \ | |
177 | if (p) \ | |
178 | { \ | |
179 | if (digits == 0 && _delta > 0) \ | |
180 | { \ | |
181 | if (pad == L_('0')) \ | |
182 | memset_zero (p, _delta); \ | |
183 | else \ | |
184 | memset_space (p, _delta); \ | |
185 | } \ | |
186 | f; \ | |
187 | advance (p, _n); \ | |
188 | } \ | |
189 | i += _incr; \ | |
190 | } while (0) | |
191 | ||
192 | #if FPRINTFTIME | |
193 | # define add1(C) add (1, fputc (C, p)) | |
194 | #else | |
195 | # define add1(C) add (1, *p = C) | |
196 | #endif | |
197 | ||
198 | #if FPRINTFTIME | |
199 | # define cpy(n, s) \ | |
200 | add ((n), \ | |
201 | if (to_lowcase) \ | |
202 | fwrite_lowcase (p, (s), _n); \ | |
203 | else if (to_uppcase) \ | |
204 | fwrite_uppcase (p, (s), _n); \ | |
205 | else \ | |
206 | fwrite ((s), _n, 1, p)) | |
207 | #else | |
208 | # define cpy(n, s) \ | |
209 | add ((n), \ | |
210 | if (to_lowcase) \ | |
211 | memcpy_lowcase (p, (s), _n LOCALE_ARG); \ | |
212 | else if (to_uppcase) \ | |
213 | memcpy_uppcase (p, (s), _n LOCALE_ARG); \ | |
214 | else \ | |
215 | MEMCPY ((void *) p, (void const *) (s), _n)) | |
216 | #endif | |
217 | ||
218 | #ifdef COMPILE_WIDE | |
219 | # ifndef USE_IN_EXTENDED_LOCALE_MODEL | |
220 | # undef __mbsrtowcs_l | |
221 | # define __mbsrtowcs_l(d, s, l, st, loc) __mbsrtowcs (d, s, l, st) | |
222 | # endif | |
223 | # define widen(os, ws, l) \ | |
224 | { \ | |
225 | mbstate_t __st; \ | |
226 | const char *__s = os; \ | |
227 | memset (&__st, '\0', sizeof (__st)); \ | |
228 | l = __mbsrtowcs_l (NULL, &__s, 0, &__st, loc); \ | |
229 | ws = (wchar_t *) alloca ((l + 1) * sizeof (wchar_t)); \ | |
230 | (void) __mbsrtowcs_l (ws, &__s, l, &__st, loc); \ | |
231 | } | |
232 | #endif | |
233 | ||
234 | ||
235 | #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL | |
236 | /* We use this code also for the extended locale handling where the | |
237 | function gets as an additional argument the locale which has to be | |
238 | used. To access the values we have to redefine the _NL_CURRENT | |
239 | macro. */ | |
240 | # define strftime __strftime_l | |
241 | # define wcsftime __wcsftime_l | |
242 | # undef _NL_CURRENT | |
243 | # define _NL_CURRENT(category, item) \ | |
244 | (current->values[_NL_ITEM_INDEX (item)].string) | |
245 | # define LOCALE_ARG , loc | |
246 | # define LOCALE_PARAM_PROTO , __locale_t loc | |
247 | # define HELPER_LOCALE_ARG , current | |
248 | #else | |
249 | # define LOCALE_PARAM_PROTO | |
250 | # define LOCALE_ARG | |
251 | # ifdef _LIBC | |
252 | # define HELPER_LOCALE_ARG , _NL_CURRENT_DATA (LC_TIME) | |
253 | # else | |
254 | # define HELPER_LOCALE_ARG | |
255 | # endif | |
256 | #endif | |
257 | ||
258 | #ifdef COMPILE_WIDE | |
259 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL | |
260 | # define TOUPPER(Ch, L) __towupper_l (Ch, L) | |
261 | # define TOLOWER(Ch, L) __towlower_l (Ch, L) | |
262 | # else | |
263 | # define TOUPPER(Ch, L) towupper (Ch) | |
264 | # define TOLOWER(Ch, L) towlower (Ch) | |
265 | # endif | |
266 | #else | |
267 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL | |
268 | # define TOUPPER(Ch, L) __toupper_l (Ch, L) | |
269 | # define TOLOWER(Ch, L) __tolower_l (Ch, L) | |
270 | # else | |
271 | # define TOUPPER(Ch, L) toupper (Ch) | |
272 | # define TOLOWER(Ch, L) tolower (Ch) | |
273 | # endif | |
274 | #endif | |
275 | /* We don't use `isdigit' here since the locale dependent | |
276 | interpretation is not what we want here. We only need to accept | |
277 | the arabic digits in the ASCII range. One day there is perhaps a | |
278 | more reliable way to accept other sets of digits. */ | |
279 | #define ISDIGIT(Ch) ((unsigned int) (Ch) - L_('0') <= 9) | |
280 | ||
281 | #if FPRINTFTIME | |
282 | static void | |
283 | fwrite_lowcase (FILE *fp, const CHAR_T *src, size_t len) | |
284 | { | |
285 | while (len-- > 0) | |
286 | { | |
287 | fputc (TOLOWER ((UCHAR_T) *src, loc), fp); | |
288 | ++src; | |
289 | } | |
290 | } | |
291 | ||
292 | static void | |
293 | fwrite_uppcase (FILE *fp, const CHAR_T *src, size_t len) | |
294 | { | |
295 | while (len-- > 0) | |
296 | { | |
297 | fputc (TOUPPER ((UCHAR_T) *src, loc), fp); | |
298 | ++src; | |
299 | } | |
300 | } | |
301 | #else | |
302 | static CHAR_T * | |
303 | memcpy_lowcase (CHAR_T *dest, const CHAR_T *src, | |
304 | size_t len LOCALE_PARAM_PROTO) | |
305 | { | |
306 | while (len-- > 0) | |
307 | dest[len] = TOLOWER ((UCHAR_T) src[len], loc); | |
308 | return dest; | |
309 | } | |
310 | ||
311 | static CHAR_T * | |
312 | memcpy_uppcase (CHAR_T *dest, const CHAR_T *src, | |
313 | size_t len LOCALE_PARAM_PROTO) | |
314 | { | |
315 | while (len-- > 0) | |
316 | dest[len] = TOUPPER ((UCHAR_T) src[len], loc); | |
317 | return dest; | |
318 | } | |
319 | #endif | |
320 | ||
321 | ||
322 | #if ! HAVE_TM_GMTOFF | |
323 | /* Yield the difference between *A and *B, | |
324 | measured in seconds, ignoring leap seconds. */ | |
325 | # define tm_diff ftime_tm_diff | |
326 | static int | |
327 | tm_diff (const struct tm *a, const struct tm *b) | |
328 | { | |
329 | /* Compute intervening leap days correctly even if year is negative. | |
330 | Take care to avoid int overflow in leap day calculations, | |
331 | but it's OK to assume that A and B are close to each other. */ | |
332 | int a4 = SHR (a->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (a->tm_year & 3); | |
333 | int b4 = SHR (b->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (b->tm_year & 3); | |
334 | int a100 = a4 / 25 - (a4 % 25 < 0); | |
335 | int b100 = b4 / 25 - (b4 % 25 < 0); | |
336 | int a400 = SHR (a100, 2); | |
337 | int b400 = SHR (b100, 2); | |
338 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); | |
339 | int years = a->tm_year - b->tm_year; | |
340 | int days = (365 * years + intervening_leap_days | |
341 | + (a->tm_yday - b->tm_yday)); | |
342 | return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) | |
343 | + (a->tm_min - b->tm_min)) | |
344 | + (a->tm_sec - b->tm_sec)); | |
345 | } | |
346 | #endif /* ! HAVE_TM_GMTOFF */ | |
347 | ||
348 | ||
349 | ||
350 | /* The number of days from the first day of the first ISO week of this | |
351 | year to the year day YDAY with week day WDAY. ISO weeks start on | |
352 | Monday; the first ISO week has the year's first Thursday. YDAY may | |
353 | be as small as YDAY_MINIMUM. */ | |
354 | #define ISO_WEEK_START_WDAY 1 /* Monday */ | |
355 | #define ISO_WEEK1_WDAY 4 /* Thursday */ | |
356 | #define YDAY_MINIMUM (-366) | |
357 | #ifdef __GNUC__ | |
358 | __inline__ | |
359 | #endif | |
360 | static int | |
361 | iso_week_days (int yday, int wday) | |
362 | { | |
363 | /* Add enough to the first operand of % to make it nonnegative. */ | |
364 | int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7; | |
365 | return (yday | |
366 | - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7 | |
367 | + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY); | |
368 | } | |
369 | ||
370 | ||
371 | /* When compiling this file, GNU applications can #define my_strftime | |
372 | to a symbol (typically nstrftime) to get an extended strftime with | |
373 | extra arguments UT and NS. Emacs is a special case for now, but | |
374 | this Emacs-specific code can be removed once Emacs's config.h | |
375 | defines my_strftime. */ | |
376 | #if defined emacs && !defined my_strftime | |
377 | # define my_strftime nstrftime | |
378 | #endif | |
379 | ||
380 | #if FPRINTFTIME | |
381 | # undef my_strftime | |
382 | # define my_strftime fprintftime | |
383 | #endif | |
384 | ||
385 | #ifdef my_strftime | |
386 | # define extra_args , ut, ns | |
387 | # define extra_args_spec , int ut, int ns | |
388 | #else | |
389 | # if defined COMPILE_WIDE | |
390 | # define my_strftime wcsftime | |
391 | # define nl_get_alt_digit _nl_get_walt_digit | |
392 | # else | |
393 | # define my_strftime strftime | |
394 | # define nl_get_alt_digit _nl_get_alt_digit | |
395 | # endif | |
396 | # define extra_args | |
397 | # define extra_args_spec | |
398 | /* We don't have this information in general. */ | |
399 | # define ut 0 | |
400 | # define ns 0 | |
401 | #endif | |
402 | ||
403 | ||
404 | /* Just like my_strftime, below, but with one more parameter, UPCASE, | |
405 | to indicate that the result should be converted to upper case. */ | |
406 | static size_t | |
407 | strftime_case_ (bool upcase, STREAM_OR_CHAR_T *s, | |
408 | STRFTIME_ARG (size_t maxsize) | |
409 | const CHAR_T *format, | |
410 | const struct tm *tp extra_args_spec LOCALE_PARAM_PROTO) | |
411 | { | |
412 | #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL | |
413 | struct locale_data *const current = loc->__locales[LC_TIME]; | |
414 | #endif | |
415 | #if FPRINTFTIME | |
416 | size_t maxsize = (size_t) -1; | |
417 | #endif | |
418 | ||
419 | int hour12 = tp->tm_hour; | |
420 | #ifdef _NL_CURRENT | |
421 | /* We cannot make the following values variables since we must delay | |
422 | the evaluation of these values until really needed since some | |
423 | expressions might not be valid in every situation. The `struct tm' | |
424 | might be generated by a strptime() call that initialized | |
425 | only a few elements. Dereference the pointers only if the format | |
426 | requires this. Then it is ok to fail if the pointers are invalid. */ | |
427 | # define a_wkday \ | |
428 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABDAY_1) + tp->tm_wday)) | |
429 | # define f_wkday \ | |
430 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(DAY_1) + tp->tm_wday)) | |
431 | # define a_month \ | |
432 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABMON_1) + tp->tm_mon)) | |
433 | # define f_month \ | |
434 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(MON_1) + tp->tm_mon)) | |
435 | # define ampm \ | |
436 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, tp->tm_hour > 11 \ | |
437 | ? NLW(PM_STR) : NLW(AM_STR))) | |
438 | ||
439 | # define aw_len STRLEN (a_wkday) | |
440 | # define am_len STRLEN (a_month) | |
441 | # define ap_len STRLEN (ampm) | |
442 | #endif | |
443 | const char *zone; | |
444 | size_t i = 0; | |
445 | STREAM_OR_CHAR_T *p = s; | |
446 | const CHAR_T *f; | |
447 | #if DO_MULTIBYTE && !defined COMPILE_WIDE | |
448 | const char *format_end = NULL; | |
449 | #endif | |
450 | ||
451 | #if ! defined _LIBC && ! HAVE_RUN_TZSET_TEST | |
452 | /* Solaris 2.5.x and 2.6 tzset sometimes modify the storage returned | |
453 | by localtime. On such systems, we must either use the tzset and | |
454 | localtime wrappers to work around the bug (which sets | |
455 | HAVE_RUN_TZSET_TEST) or make a copy of the structure. */ | |
456 | struct tm copy = *tp; | |
457 | tp = © | |
458 | #endif | |
459 | ||
460 | zone = NULL; | |
461 | #if HAVE_TM_ZONE | |
462 | /* The POSIX test suite assumes that setting | |
463 | the environment variable TZ to a new value before calling strftime() | |
464 | will influence the result (the %Z format) even if the information in | |
465 | TP is computed with a totally different time zone. | |
466 | This is bogus: though POSIX allows bad behavior like this, | |
467 | POSIX does not require it. Do the right thing instead. */ | |
468 | zone = (const char *) tp->tm_zone; | |
469 | #endif | |
470 | #if HAVE_TZNAME | |
471 | if (ut) | |
472 | { | |
473 | if (! (zone && *zone)) | |
474 | zone = "GMT"; | |
475 | } | |
476 | else | |
477 | { | |
478 | /* POSIX.1 requires that local time zone information be used as | |
479 | though strftime called tzset. */ | |
480 | # if HAVE_TZSET | |
481 | tzset (); | |
482 | # endif | |
483 | } | |
484 | #endif | |
485 | ||
486 | if (hour12 > 12) | |
487 | hour12 -= 12; | |
488 | else | |
489 | if (hour12 == 0) | |
490 | hour12 = 12; | |
491 | ||
492 | for (f = format; *f != '\0'; ++f) | |
493 | { | |
494 | int pad = 0; /* Padding for number ('-', '_', or 0). */ | |
495 | int modifier; /* Field modifier ('E', 'O', or 0). */ | |
496 | int digits = 0; /* Max digits for numeric format. */ | |
497 | int number_value; /* Numeric value to be printed. */ | |
498 | unsigned int u_number_value; /* (unsigned int) number_value. */ | |
499 | bool negative_number; /* The number is negative. */ | |
500 | bool always_output_a_sign; /* +/- should always be output. */ | |
501 | int tz_colon_mask; /* Bitmask of where ':' should appear. */ | |
502 | const CHAR_T *subfmt; | |
503 | CHAR_T sign_char; | |
504 | CHAR_T *bufp; | |
505 | CHAR_T buf[1 | |
506 | + 2 /* for the two colons in a %::z or %:::z time zone */ | |
507 | + (sizeof (int) < sizeof (time_t) | |
508 | ? INT_STRLEN_BOUND (time_t) | |
509 | : INT_STRLEN_BOUND (int))]; | |
510 | int width = -1; | |
511 | bool to_lowcase = false; | |
512 | bool to_uppcase = upcase; | |
513 | size_t colons; | |
514 | bool change_case = false; | |
515 | int format_char; | |
516 | ||
517 | #if DO_MULTIBYTE && !defined COMPILE_WIDE | |
518 | switch (*f) | |
519 | { | |
520 | case L_('%'): | |
521 | break; | |
522 | ||
523 | case L_('\b'): case L_('\t'): case L_('\n'): | |
524 | case L_('\v'): case L_('\f'): case L_('\r'): | |
525 | case L_(' '): case L_('!'): case L_('"'): case L_('#'): case L_('&'): | |
526 | case L_('\''): case L_('('): case L_(')'): case L_('*'): case L_('+'): | |
527 | case L_(','): case L_('-'): case L_('.'): case L_('/'): case L_('0'): | |
528 | case L_('1'): case L_('2'): case L_('3'): case L_('4'): case L_('5'): | |
529 | case L_('6'): case L_('7'): case L_('8'): case L_('9'): case L_(':'): | |
530 | case L_(';'): case L_('<'): case L_('='): case L_('>'): case L_('?'): | |
531 | case L_('A'): case L_('B'): case L_('C'): case L_('D'): case L_('E'): | |
532 | case L_('F'): case L_('G'): case L_('H'): case L_('I'): case L_('J'): | |
533 | case L_('K'): case L_('L'): case L_('M'): case L_('N'): case L_('O'): | |
534 | case L_('P'): case L_('Q'): case L_('R'): case L_('S'): case L_('T'): | |
535 | case L_('U'): case L_('V'): case L_('W'): case L_('X'): case L_('Y'): | |
536 | case L_('Z'): case L_('['): case L_('\\'): case L_(']'): case L_('^'): | |
537 | case L_('_'): case L_('a'): case L_('b'): case L_('c'): case L_('d'): | |
538 | case L_('e'): case L_('f'): case L_('g'): case L_('h'): case L_('i'): | |
539 | case L_('j'): case L_('k'): case L_('l'): case L_('m'): case L_('n'): | |
540 | case L_('o'): case L_('p'): case L_('q'): case L_('r'): case L_('s'): | |
541 | case L_('t'): case L_('u'): case L_('v'): case L_('w'): case L_('x'): | |
542 | case L_('y'): case L_('z'): case L_('{'): case L_('|'): case L_('}'): | |
543 | case L_('~'): | |
544 | /* The C Standard requires these 98 characters (plus '%') to | |
545 | be in the basic execution character set. None of these | |
546 | characters can start a multibyte sequence, so they need | |
547 | not be analyzed further. */ | |
548 | add1 (*f); | |
549 | continue; | |
550 | ||
551 | default: | |
552 | /* Copy this multibyte sequence until we reach its end, find | |
553 | an error, or come back to the initial shift state. */ | |
554 | { | |
555 | mbstate_t mbstate = mbstate_zero; | |
556 | size_t len = 0; | |
557 | size_t fsize; | |
558 | ||
559 | if (! format_end) | |
560 | format_end = f + strlen (f) + 1; | |
561 | fsize = format_end - f; | |
562 | ||
563 | do | |
564 | { | |
565 | size_t bytes = mbrlen (f + len, fsize - len, &mbstate); | |
566 | ||
567 | if (bytes == 0) | |
568 | break; | |
569 | ||
570 | if (bytes == (size_t) -2) | |
571 | { | |
572 | len += strlen (f + len); | |
573 | break; | |
574 | } | |
575 | ||
576 | if (bytes == (size_t) -1) | |
577 | { | |
578 | len++; | |
579 | break; | |
580 | } | |
581 | ||
582 | len += bytes; | |
583 | } | |
584 | while (! mbsinit (&mbstate)); | |
585 | ||
586 | cpy (len, f); | |
587 | f += len - 1; | |
588 | continue; | |
589 | } | |
590 | } | |
591 | ||
592 | #else /* ! DO_MULTIBYTE */ | |
593 | ||
594 | /* Either multibyte encodings are not supported, they are | |
595 | safe for formats, so any non-'%' byte can be copied through, | |
596 | or this is the wide character version. */ | |
597 | if (*f != L_('%')) | |
598 | { | |
599 | add1 (*f); | |
600 | continue; | |
601 | } | |
602 | ||
603 | #endif /* ! DO_MULTIBYTE */ | |
604 | ||
605 | /* Check for flags that can modify a format. */ | |
606 | while (1) | |
607 | { | |
608 | switch (*++f) | |
609 | { | |
610 | /* This influences the number formats. */ | |
611 | case L_('_'): | |
612 | case L_('-'): | |
613 | case L_('0'): | |
614 | pad = *f; | |
615 | continue; | |
616 | ||
617 | /* This changes textual output. */ | |
618 | case L_('^'): | |
619 | to_uppcase = true; | |
620 | continue; | |
621 | case L_('#'): | |
622 | change_case = true; | |
623 | continue; | |
624 | ||
625 | default: | |
626 | break; | |
627 | } | |
628 | break; | |
629 | } | |
630 | ||
631 | /* As a GNU extension we allow to specify the field width. */ | |
632 | if (ISDIGIT (*f)) | |
633 | { | |
634 | width = 0; | |
635 | do | |
636 | { | |
637 | if (width > INT_MAX / 10 | |
638 | || (width == INT_MAX / 10 && *f - L_('0') > INT_MAX % 10)) | |
639 | /* Avoid overflow. */ | |
640 | width = INT_MAX; | |
641 | else | |
642 | { | |
643 | width *= 10; | |
644 | width += *f - L_('0'); | |
645 | } | |
646 | ++f; | |
647 | } | |
648 | while (ISDIGIT (*f)); | |
649 | } | |
650 | ||
651 | /* Check for modifiers. */ | |
652 | switch (*f) | |
653 | { | |
654 | case L_('E'): | |
655 | case L_('O'): | |
656 | modifier = *f++; | |
657 | break; | |
658 | ||
659 | default: | |
660 | modifier = 0; | |
661 | break; | |
662 | } | |
663 | ||
664 | /* Now do the specified format. */ | |
665 | format_char = *f; | |
666 | switch (format_char) | |
667 | { | |
668 | #define DO_NUMBER(d, v) \ | |
669 | digits = d; \ | |
670 | number_value = v; goto do_number | |
671 | #define DO_SIGNED_NUMBER(d, negative, v) \ | |
672 | digits = d; \ | |
673 | negative_number = negative; \ | |
674 | u_number_value = v; goto do_signed_number | |
675 | ||
676 | /* The mask is not what you might think. | |
677 | When the ordinal i'th bit is set, insert a colon | |
678 | before the i'th digit of the time zone representation. */ | |
679 | #define DO_TZ_OFFSET(d, negative, mask, v) \ | |
680 | digits = d; \ | |
681 | negative_number = negative; \ | |
682 | tz_colon_mask = mask; \ | |
683 | u_number_value = v; goto do_tz_offset | |
684 | #define DO_NUMBER_SPACEPAD(d, v) \ | |
685 | digits = d; \ | |
686 | number_value = v; goto do_number_spacepad | |
687 | ||
688 | case L_('%'): | |
689 | if (modifier != 0) | |
690 | goto bad_format; | |
691 | add1 (*f); | |
692 | break; | |
693 | ||
694 | case L_('a'): | |
695 | if (modifier != 0) | |
696 | goto bad_format; | |
697 | if (change_case) | |
698 | { | |
699 | to_uppcase = true; | |
700 | to_lowcase = false; | |
701 | } | |
702 | #ifdef _NL_CURRENT | |
703 | cpy (aw_len, a_wkday); | |
704 | break; | |
705 | #else | |
706 | goto underlying_strftime; | |
707 | #endif | |
708 | ||
709 | case 'A': | |
710 | if (modifier != 0) | |
711 | goto bad_format; | |
712 | if (change_case) | |
713 | { | |
714 | to_uppcase = true; | |
715 | to_lowcase = false; | |
716 | } | |
717 | #ifdef _NL_CURRENT | |
718 | cpy (STRLEN (f_wkday), f_wkday); | |
719 | break; | |
720 | #else | |
721 | goto underlying_strftime; | |
722 | #endif | |
723 | ||
724 | case L_('b'): | |
725 | case L_('h'): | |
726 | if (change_case) | |
727 | { | |
728 | to_uppcase = true; | |
729 | to_lowcase = false; | |
730 | } | |
731 | if (modifier != 0) | |
732 | goto bad_format; | |
733 | #ifdef _NL_CURRENT | |
734 | cpy (am_len, a_month); | |
735 | break; | |
736 | #else | |
737 | goto underlying_strftime; | |
738 | #endif | |
739 | ||
740 | case L_('B'): | |
741 | if (modifier != 0) | |
742 | goto bad_format; | |
743 | if (change_case) | |
744 | { | |
745 | to_uppcase = true; | |
746 | to_lowcase = false; | |
747 | } | |
748 | #ifdef _NL_CURRENT | |
749 | cpy (STRLEN (f_month), f_month); | |
750 | break; | |
751 | #else | |
752 | goto underlying_strftime; | |
753 | #endif | |
754 | ||
755 | case L_('c'): | |
756 | if (modifier == L_('O')) | |
757 | goto bad_format; | |
758 | #ifdef _NL_CURRENT | |
759 | if (! (modifier == 'E' | |
760 | && (*(subfmt = | |
761 | (const CHAR_T *) _NL_CURRENT (LC_TIME, | |
762 | NLW(ERA_D_T_FMT))) | |
763 | != '\0'))) | |
764 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_T_FMT)); | |
765 | #else | |
766 | goto underlying_strftime; | |
767 | #endif | |
768 | ||
769 | subformat: | |
770 | { | |
771 | size_t len = strftime_case_ (to_uppcase, | |
772 | NULL, STRFTIME_ARG ((size_t) -1) | |
773 | subfmt, | |
774 | tp extra_args LOCALE_ARG); | |
775 | add (len, strftime_case_ (to_uppcase, p, | |
776 | STRFTIME_ARG (maxsize - i) | |
777 | subfmt, | |
778 | tp extra_args LOCALE_ARG)); | |
779 | } | |
780 | break; | |
781 | ||
782 | #if !(defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY) | |
783 | underlying_strftime: | |
784 | { | |
785 | /* The relevant information is available only via the | |
786 | underlying strftime implementation, so use that. */ | |
787 | char ufmt[5]; | |
788 | char *u = ufmt; | |
789 | char ubuf[1024]; /* enough for any single format in practice */ | |
790 | size_t len; | |
791 | /* Make sure we're calling the actual underlying strftime. | |
792 | In some cases, config.h contains something like | |
793 | "#define strftime rpl_strftime". */ | |
794 | # ifdef strftime | |
795 | # undef strftime | |
796 | size_t strftime (); | |
797 | # endif | |
798 | ||
799 | /* The space helps distinguish strftime failure from empty | |
800 | output. */ | |
801 | *u++ = ' '; | |
802 | *u++ = '%'; | |
803 | if (modifier != 0) | |
804 | *u++ = modifier; | |
805 | *u++ = format_char; | |
806 | *u = '\0'; | |
807 | len = strftime (ubuf, sizeof ubuf, ufmt, tp); | |
808 | if (len != 0) | |
809 | cpy (len - 1, ubuf + 1); | |
810 | } | |
811 | break; | |
812 | #endif | |
813 | ||
814 | case L_('C'): | |
815 | if (modifier == L_('O')) | |
816 | goto bad_format; | |
817 | if (modifier == L_('E')) | |
818 | { | |
819 | #if HAVE_STRUCT_ERA_ENTRY | |
820 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); | |
821 | if (era) | |
822 | { | |
823 | # ifdef COMPILE_WIDE | |
824 | size_t len = __wcslen (era->era_wname); | |
825 | cpy (len, era->era_wname); | |
826 | # else | |
827 | size_t len = strlen (era->era_name); | |
828 | cpy (len, era->era_name); | |
829 | # endif | |
830 | break; | |
831 | } | |
832 | #else | |
833 | goto underlying_strftime; | |
834 | #endif | |
835 | } | |
836 | ||
837 | { | |
838 | int century = tp->tm_year / 100 + TM_YEAR_BASE / 100; | |
839 | century -= tp->tm_year % 100 < 0 && 0 < century; | |
840 | DO_SIGNED_NUMBER (2, tp->tm_year < - TM_YEAR_BASE, century); | |
841 | } | |
842 | ||
843 | case L_('x'): | |
844 | if (modifier == L_('O')) | |
845 | goto bad_format; | |
846 | #ifdef _NL_CURRENT | |
847 | if (! (modifier == L_('E') | |
848 | && (*(subfmt = | |
849 | (const CHAR_T *)_NL_CURRENT (LC_TIME, NLW(ERA_D_FMT))) | |
850 | != L_('\0')))) | |
851 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_FMT)); | |
852 | goto subformat; | |
853 | #else | |
854 | goto underlying_strftime; | |
855 | #endif | |
856 | case L_('D'): | |
857 | if (modifier != 0) | |
858 | goto bad_format; | |
859 | subfmt = L_("%m/%d/%y"); | |
860 | goto subformat; | |
861 | ||
862 | case L_('d'): | |
863 | if (modifier == L_('E')) | |
864 | goto bad_format; | |
865 | ||
866 | DO_NUMBER (2, tp->tm_mday); | |
867 | ||
868 | case L_('e'): | |
869 | if (modifier == L_('E')) | |
870 | goto bad_format; | |
871 | ||
872 | DO_NUMBER_SPACEPAD (2, tp->tm_mday); | |
873 | ||
874 | /* All numeric formats set DIGITS and NUMBER_VALUE (or U_NUMBER_VALUE) | |
875 | and then jump to one of these labels. */ | |
876 | ||
877 | do_tz_offset: | |
878 | always_output_a_sign = true; | |
879 | goto do_number_body; | |
880 | ||
881 | do_number_spacepad: | |
882 | /* Force `_' flag unless overridden by `0' or `-' flag. */ | |
883 | if (pad != L_('0') && pad != L_('-')) | |
884 | pad = L_('_'); | |
885 | ||
886 | do_number: | |
887 | /* Format NUMBER_VALUE according to the MODIFIER flag. */ | |
888 | negative_number = number_value < 0; | |
889 | u_number_value = number_value; | |
890 | ||
891 | do_signed_number: | |
892 | always_output_a_sign = false; | |
893 | tz_colon_mask = 0; | |
894 | ||
895 | do_number_body: | |
896 | /* Format U_NUMBER_VALUE according to the MODIFIER flag. | |
897 | NEGATIVE_NUMBER is nonzero if the original number was | |
898 | negative; in this case it was converted directly to | |
899 | unsigned int (i.e., modulo (UINT_MAX + 1)) without | |
900 | negating it. */ | |
901 | if (modifier == L_('O') && !negative_number) | |
902 | { | |
903 | #ifdef _NL_CURRENT | |
904 | /* Get the locale specific alternate representation of | |
905 | the number. If none exist NULL is returned. */ | |
906 | const CHAR_T *cp = nl_get_alt_digit (u_number_value | |
907 | HELPER_LOCALE_ARG); | |
908 | ||
909 | if (cp != NULL) | |
910 | { | |
911 | size_t digitlen = STRLEN (cp); | |
912 | if (digitlen != 0) | |
913 | { | |
914 | cpy (digitlen, cp); | |
915 | break; | |
916 | } | |
917 | } | |
918 | #else | |
919 | goto underlying_strftime; | |
920 | #endif | |
921 | } | |
922 | ||
923 | bufp = buf + sizeof (buf) / sizeof (buf[0]); | |
924 | ||
925 | if (negative_number) | |
926 | u_number_value = - u_number_value; | |
927 | ||
928 | do | |
929 | { | |
930 | if (tz_colon_mask & 1) | |
931 | *--bufp = ':'; | |
932 | tz_colon_mask >>= 1; | |
933 | *--bufp = u_number_value % 10 + L_('0'); | |
934 | u_number_value /= 10; | |
935 | } | |
936 | while (u_number_value != 0 || tz_colon_mask != 0); | |
937 | ||
938 | do_number_sign_and_padding: | |
939 | if (digits < width) | |
940 | digits = width; | |
941 | ||
942 | sign_char = (negative_number ? L_('-') | |
943 | : always_output_a_sign ? L_('+') | |
944 | : 0); | |
945 | ||
946 | if (pad == L_('-')) | |
947 | { | |
948 | if (sign_char) | |
949 | add1 (sign_char); | |
950 | } | |
951 | else | |
952 | { | |
953 | int padding = digits - (buf + (sizeof (buf) / sizeof (buf[0])) | |
954 | - bufp) - !!sign_char; | |
955 | ||
956 | if (padding > 0) | |
957 | { | |
958 | if (pad == L_('_')) | |
959 | { | |
960 | if ((size_t) padding >= maxsize - i) | |
961 | return 0; | |
962 | ||
963 | if (p) | |
964 | memset_space (p, padding); | |
965 | i += padding; | |
966 | width = width > padding ? width - padding : 0; | |
967 | if (sign_char) | |
968 | add1 (sign_char); | |
969 | } | |
970 | else | |
971 | { | |
972 | if ((size_t) digits >= maxsize - i) | |
973 | return 0; | |
974 | ||
975 | if (sign_char) | |
976 | add1 (sign_char); | |
977 | ||
978 | if (p) | |
979 | memset_zero (p, padding); | |
980 | i += padding; | |
981 | width = 0; | |
982 | } | |
983 | } | |
984 | else | |
985 | { | |
986 | if (sign_char) | |
987 | add1 (sign_char); | |
988 | } | |
989 | } | |
990 | ||
991 | cpy (buf + sizeof (buf) / sizeof (buf[0]) - bufp, bufp); | |
992 | break; | |
993 | ||
994 | case L_('F'): | |
995 | if (modifier != 0) | |
996 | goto bad_format; | |
997 | subfmt = L_("%Y-%m-%d"); | |
998 | goto subformat; | |
999 | ||
1000 | case L_('H'): | |
1001 | if (modifier == L_('E')) | |
1002 | goto bad_format; | |
1003 | ||
1004 | DO_NUMBER (2, tp->tm_hour); | |
1005 | ||
1006 | case L_('I'): | |
1007 | if (modifier == L_('E')) | |
1008 | goto bad_format; | |
1009 | ||
1010 | DO_NUMBER (2, hour12); | |
1011 | ||
1012 | case L_('k'): /* GNU extension. */ | |
1013 | if (modifier == L_('E')) | |
1014 | goto bad_format; | |
1015 | ||
1016 | DO_NUMBER_SPACEPAD (2, tp->tm_hour); | |
1017 | ||
1018 | case L_('l'): /* GNU extension. */ | |
1019 | if (modifier == L_('E')) | |
1020 | goto bad_format; | |
1021 | ||
1022 | DO_NUMBER_SPACEPAD (2, hour12); | |
1023 | ||
1024 | case L_('j'): | |
1025 | if (modifier == L_('E')) | |
1026 | goto bad_format; | |
1027 | ||
1028 | DO_SIGNED_NUMBER (3, tp->tm_yday < -1, tp->tm_yday + 1U); | |
1029 | ||
1030 | case L_('M'): | |
1031 | if (modifier == L_('E')) | |
1032 | goto bad_format; | |
1033 | ||
1034 | DO_NUMBER (2, tp->tm_min); | |
1035 | ||
1036 | case L_('m'): | |
1037 | if (modifier == L_('E')) | |
1038 | goto bad_format; | |
1039 | ||
1040 | DO_SIGNED_NUMBER (2, tp->tm_mon < -1, tp->tm_mon + 1U); | |
1041 | ||
1042 | #ifndef _LIBC | |
1043 | case L_('N'): /* GNU extension. */ | |
1044 | if (modifier == L_('E')) | |
1045 | goto bad_format; | |
1046 | ||
1047 | number_value = ns; | |
1048 | if (width == -1) | |
1049 | width = 9; | |
1050 | else | |
1051 | { | |
1052 | /* Take an explicit width less than 9 as a precision. */ | |
1053 | int j; | |
1054 | for (j = width; j < 9; j++) | |
1055 | number_value /= 10; | |
1056 | } | |
1057 | ||
1058 | DO_NUMBER (width, number_value); | |
1059 | #endif | |
1060 | ||
1061 | case L_('n'): | |
1062 | add1 (L_('\n')); | |
1063 | break; | |
1064 | ||
1065 | case L_('P'): | |
1066 | to_lowcase = true; | |
1067 | #ifndef _NL_CURRENT | |
1068 | format_char = L_('p'); | |
1069 | #endif | |
1070 | /* FALLTHROUGH */ | |
1071 | ||
1072 | case L_('p'): | |
1073 | if (change_case) | |
1074 | { | |
1075 | to_uppcase = false; | |
1076 | to_lowcase = true; | |
1077 | } | |
1078 | #ifdef _NL_CURRENT | |
1079 | cpy (ap_len, ampm); | |
1080 | break; | |
1081 | #else | |
1082 | goto underlying_strftime; | |
1083 | #endif | |
1084 | ||
1085 | case L_('R'): | |
1086 | subfmt = L_("%H:%M"); | |
1087 | goto subformat; | |
1088 | ||
1089 | case L_('r'): | |
1090 | #ifdef _NL_CURRENT | |
1091 | if (*(subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, | |
1092 | NLW(T_FMT_AMPM))) | |
1093 | == L_('\0')) | |
1094 | subfmt = L_("%I:%M:%S %p"); | |
1095 | goto subformat; | |
1096 | #else | |
1097 | goto underlying_strftime; | |
1098 | #endif | |
1099 | ||
1100 | case L_('S'): | |
1101 | if (modifier == L_('E')) | |
1102 | goto bad_format; | |
1103 | ||
1104 | DO_NUMBER (2, tp->tm_sec); | |
1105 | ||
1106 | case L_('s'): /* GNU extension. */ | |
1107 | { | |
1108 | struct tm ltm; | |
1109 | time_t t; | |
1110 | ||
1111 | ltm = *tp; | |
1112 | t = mktime (<m); | |
1113 | ||
1114 | /* Generate string value for T using time_t arithmetic; | |
1115 | this works even if sizeof (long) < sizeof (time_t). */ | |
1116 | ||
1117 | bufp = buf + sizeof (buf) / sizeof (buf[0]); | |
1118 | negative_number = t < 0; | |
1119 | ||
1120 | do | |
1121 | { | |
1122 | int d = t % 10; | |
1123 | t /= 10; | |
1124 | *--bufp = (negative_number ? -d : d) + L_('0'); | |
1125 | } | |
1126 | while (t != 0); | |
1127 | ||
1128 | digits = 1; | |
1129 | always_output_a_sign = false; | |
1130 | goto do_number_sign_and_padding; | |
1131 | } | |
1132 | ||
1133 | case L_('X'): | |
1134 | if (modifier == L_('O')) | |
1135 | goto bad_format; | |
1136 | #ifdef _NL_CURRENT | |
1137 | if (! (modifier == L_('E') | |
1138 | && (*(subfmt = | |
1139 | (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ERA_T_FMT))) | |
1140 | != L_('\0')))) | |
1141 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(T_FMT)); | |
1142 | goto subformat; | |
1143 | #else | |
1144 | goto underlying_strftime; | |
1145 | #endif | |
1146 | case L_('T'): | |
1147 | subfmt = L_("%H:%M:%S"); | |
1148 | goto subformat; | |
1149 | ||
1150 | case L_('t'): | |
1151 | add1 (L_('\t')); | |
1152 | break; | |
1153 | ||
1154 | case L_('u'): | |
1155 | DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1); | |
1156 | ||
1157 | case L_('U'): | |
1158 | if (modifier == L_('E')) | |
1159 | goto bad_format; | |
1160 | ||
1161 | DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7); | |
1162 | ||
1163 | case L_('V'): | |
1164 | case L_('g'): | |
1165 | case L_('G'): | |
1166 | if (modifier == L_('E')) | |
1167 | goto bad_format; | |
1168 | { | |
1169 | /* YEAR is a leap year if and only if (tp->tm_year + TM_YEAR_BASE) | |
1170 | is a leap year, except that YEAR and YEAR - 1 both work | |
1171 | correctly even when (tp->tm_year + TM_YEAR_BASE) would | |
1172 | overflow. */ | |
1173 | int year = (tp->tm_year | |
1174 | + (tp->tm_year < 0 | |
1175 | ? TM_YEAR_BASE % 400 | |
1176 | : TM_YEAR_BASE % 400 - 400)); | |
1177 | int year_adjust = 0; | |
1178 | int days = iso_week_days (tp->tm_yday, tp->tm_wday); | |
1179 | ||
1180 | if (days < 0) | |
1181 | { | |
1182 | /* This ISO week belongs to the previous year. */ | |
1183 | year_adjust = -1; | |
1184 | days = iso_week_days (tp->tm_yday + (365 + __isleap (year - 1)), | |
1185 | tp->tm_wday); | |
1186 | } | |
1187 | else | |
1188 | { | |
1189 | int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)), | |
1190 | tp->tm_wday); | |
1191 | if (0 <= d) | |
1192 | { | |
1193 | /* This ISO week belongs to the next year. */ | |
1194 | year_adjust = 1; | |
1195 | days = d; | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | switch (*f) | |
1200 | { | |
1201 | case L_('g'): | |
1202 | { | |
1203 | int yy = (tp->tm_year % 100 + year_adjust) % 100; | |
1204 | DO_NUMBER (2, (0 <= yy | |
1205 | ? yy | |
1206 | : tp->tm_year < -TM_YEAR_BASE - year_adjust | |
1207 | ? -yy | |
1208 | : yy + 100)); | |
1209 | } | |
1210 | ||
1211 | case L_('G'): | |
1212 | DO_SIGNED_NUMBER (4, tp->tm_year < -TM_YEAR_BASE - year_adjust, | |
1213 | (tp->tm_year + (unsigned int) TM_YEAR_BASE | |
1214 | + year_adjust)); | |
1215 | ||
1216 | default: | |
1217 | DO_NUMBER (2, days / 7 + 1); | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | case L_('W'): | |
1222 | if (modifier == L_('E')) | |
1223 | goto bad_format; | |
1224 | ||
1225 | DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7); | |
1226 | ||
1227 | case L_('w'): | |
1228 | if (modifier == L_('E')) | |
1229 | goto bad_format; | |
1230 | ||
1231 | DO_NUMBER (1, tp->tm_wday); | |
1232 | ||
1233 | case L_('Y'): | |
1234 | if (modifier == 'E') | |
1235 | { | |
1236 | #if HAVE_STRUCT_ERA_ENTRY | |
1237 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); | |
1238 | if (era) | |
1239 | { | |
1240 | # ifdef COMPILE_WIDE | |
1241 | subfmt = era->era_wformat; | |
1242 | # else | |
1243 | subfmt = era->era_format; | |
1244 | # endif | |
1245 | goto subformat; | |
1246 | } | |
1247 | #else | |
1248 | goto underlying_strftime; | |
1249 | #endif | |
1250 | } | |
1251 | if (modifier == L_('O')) | |
1252 | goto bad_format; | |
1253 | else | |
1254 | DO_SIGNED_NUMBER (4, tp->tm_year < -TM_YEAR_BASE, | |
1255 | tp->tm_year + (unsigned int) TM_YEAR_BASE); | |
1256 | ||
1257 | case L_('y'): | |
1258 | if (modifier == L_('E')) | |
1259 | { | |
1260 | #if HAVE_STRUCT_ERA_ENTRY | |
1261 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); | |
1262 | if (era) | |
1263 | { | |
1264 | int delta = tp->tm_year - era->start_date[0]; | |
1265 | DO_NUMBER (1, (era->offset | |
1266 | + delta * era->absolute_direction)); | |
1267 | } | |
1268 | #else | |
1269 | goto underlying_strftime; | |
1270 | #endif | |
1271 | } | |
1272 | ||
1273 | { | |
1274 | int yy = tp->tm_year % 100; | |
1275 | if (yy < 0) | |
1276 | yy = tp->tm_year < - TM_YEAR_BASE ? -yy : yy + 100; | |
1277 | DO_NUMBER (2, yy); | |
1278 | } | |
1279 | ||
1280 | case L_('Z'): | |
1281 | if (change_case) | |
1282 | { | |
1283 | to_uppcase = false; | |
1284 | to_lowcase = true; | |
1285 | } | |
1286 | ||
1287 | #if HAVE_TZNAME | |
1288 | /* The tzset() call might have changed the value. */ | |
1289 | if (!(zone && *zone) && tp->tm_isdst >= 0) | |
1290 | zone = tzname[tp->tm_isdst != 0]; | |
1291 | #endif | |
1292 | if (! zone) | |
1293 | zone = ""; | |
1294 | ||
1295 | #ifdef COMPILE_WIDE | |
1296 | { | |
1297 | /* The zone string is always given in multibyte form. We have | |
1298 | to transform it first. */ | |
1299 | wchar_t *wczone; | |
1300 | size_t len; | |
1301 | widen (zone, wczone, len); | |
1302 | cpy (len, wczone); | |
1303 | } | |
1304 | #else | |
1305 | cpy (strlen (zone), zone); | |
1306 | #endif | |
1307 | break; | |
1308 | ||
1309 | case L_(':'): | |
1310 | /* :, ::, and ::: are valid only just before 'z'. | |
1311 | :::: etc. are rejected later. */ | |
1312 | for (colons = 1; f[colons] == L_(':'); colons++) | |
1313 | continue; | |
1314 | if (f[colons] != L_('z')) | |
1315 | goto bad_format; | |
1316 | f += colons; | |
1317 | goto do_z_conversion; | |
1318 | ||
1319 | case L_('z'): | |
1320 | colons = 0; | |
1321 | ||
1322 | do_z_conversion: | |
1323 | if (tp->tm_isdst < 0) | |
1324 | break; | |
1325 | ||
1326 | { | |
1327 | int diff; | |
1328 | int hour_diff; | |
1329 | int min_diff; | |
1330 | int sec_diff; | |
1331 | #if HAVE_TM_GMTOFF | |
1332 | diff = tp->tm_gmtoff; | |
1333 | #else | |
1334 | if (ut) | |
1335 | diff = 0; | |
1336 | else | |
1337 | { | |
1338 | struct tm gtm; | |
1339 | struct tm ltm; | |
1340 | time_t lt; | |
1341 | ||
1342 | ltm = *tp; | |
1343 | lt = mktime (<m); | |
1344 | ||
1345 | if (lt == (time_t) -1) | |
1346 | { | |
1347 | /* mktime returns -1 for errors, but -1 is also a | |
1348 | valid time_t value. Check whether an error really | |
1349 | occurred. */ | |
1350 | struct tm tm; | |
1351 | ||
1352 | if (! __localtime_r (<, &tm) | |
1353 | || ((ltm.tm_sec ^ tm.tm_sec) | |
1354 | | (ltm.tm_min ^ tm.tm_min) | |
1355 | | (ltm.tm_hour ^ tm.tm_hour) | |
1356 | | (ltm.tm_mday ^ tm.tm_mday) | |
1357 | | (ltm.tm_mon ^ tm.tm_mon) | |
1358 | | (ltm.tm_year ^ tm.tm_year))) | |
1359 | break; | |
1360 | } | |
1361 | ||
1362 | if (! __gmtime_r (<, >m)) | |
1363 | break; | |
1364 | ||
1365 | diff = tm_diff (<m, >m); | |
1366 | } | |
1367 | #endif | |
1368 | ||
1369 | hour_diff = diff / 60 / 60; | |
1370 | min_diff = diff / 60 % 60; | |
1371 | sec_diff = diff % 60; | |
1372 | ||
1373 | switch (colons) | |
1374 | { | |
1375 | case 0: /* +hhmm */ | |
1376 | DO_TZ_OFFSET (5, diff < 0, 0, hour_diff * 100 + min_diff); | |
1377 | ||
1378 | case 1: tz_hh_mm: /* +hh:mm */ | |
1379 | DO_TZ_OFFSET (6, diff < 0, 04, hour_diff * 100 + min_diff); | |
1380 | ||
1381 | case 2: tz_hh_mm_ss: /* +hh:mm:ss */ | |
1382 | DO_TZ_OFFSET (9, diff < 0, 024, | |
1383 | hour_diff * 10000 + min_diff * 100 + sec_diff); | |
1384 | ||
1385 | case 3: /* +hh if possible, else +hh:mm, else +hh:mm:ss */ | |
1386 | if (sec_diff != 0) | |
1387 | goto tz_hh_mm_ss; | |
1388 | if (min_diff != 0) | |
1389 | goto tz_hh_mm; | |
1390 | DO_TZ_OFFSET (3, diff < 0, 0, hour_diff); | |
1391 | ||
1392 | default: | |
1393 | goto bad_format; | |
1394 | } | |
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 ! FPRINTFTIME | |
1416 | if (p && maxsize != 0) | |
1417 | *p = L_('\0'); | |
1418 | #endif | |
1419 | ||
1420 | return i; | |
1421 | } | |
1422 | ||
1423 | /* Write information from TP into S according to the format | |
1424 | string FORMAT, writing no more that MAXSIZE characters | |
1425 | (including the terminating '\0') and returning number of | |
1426 | characters written. If S is NULL, nothing will be written | |
1427 | anywhere, so to determine how many characters would be | |
1428 | written, use NULL for S and (size_t) -1 for MAXSIZE. */ | |
1429 | size_t | |
1430 | my_strftime (STREAM_OR_CHAR_T *s, STRFTIME_ARG (size_t maxsize) | |
1431 | const CHAR_T *format, | |
1432 | const struct tm *tp extra_args_spec LOCALE_PARAM_PROTO) | |
1433 | { | |
1434 | return strftime_case_ (false, s, STRFTIME_ARG (maxsize) | |
1435 | format, tp extra_args LOCALE_ARG); | |
1436 | } | |
1437 | ||
1438 | #if defined _LIBC && ! FPRINTFTIME | |
1439 | libc_hidden_def (my_strftime) | |
1440 | #endif | |
1441 | ||
1442 | ||
1443 | #if defined emacs && ! FPRINTFTIME | |
1444 | /* For Emacs we have a separate interface which corresponds to the normal | |
1445 | strftime function plus the ut argument, but without the ns argument. */ | |
1446 | size_t | |
1447 | emacs_strftimeu (char *s, size_t maxsize, const char *format, | |
1448 | const struct tm *tp, int ut) | |
1449 | { | |
1450 | return my_strftime (s, maxsize, format, tp, ut, 0); | |
1451 | } | |
1452 | #endif |