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1 | /* Copyright (C) 1991-1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007 Free Software |
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 | |
21 | # define HAVE_MBLEN 1 | |
22 | # define HAVE_MBRLEN 1 | |
23 | # define HAVE_STRUCT_ERA_ENTRY 1 | |
24 | # define HAVE_TM_GMTOFF 1 | |
25 | # define HAVE_TM_ZONE 1 | |
26 | # define HAVE_TZNAME 1 | |
27 | # define HAVE_TZSET 1 | |
28 | # define MULTIBYTE_IS_FORMAT_SAFE 1 | |
29 | # include "../locale/localeinfo.h" | |
30 | #else | |
31 | # include <config.h> | |
32 | # if FPRINTFTIME | |
33 | # include "fprintftime.h" | |
34 | # endif | |
35 | #endif | |
36 | ||
37 | #include <ctype.h> | |
38 | #include <time.h> | |
39 | ||
40 | #if HAVE_TZNAME && !HAVE_DECL_TZNAME | |
41 | extern char *tzname[]; | |
42 | #endif | |
43 | ||
44 | /* Do multibyte processing if multibytes are supported, unless | |
45 | multibyte sequences are safe in formats. Multibyte sequences are | |
46 | safe if they cannot contain byte sequences that look like format | |
47 | conversion specifications. The GNU C Library uses UTF8 multibyte | |
48 | encoding, which is safe for formats, but strftime.c can be used | |
49 | with other C libraries that use unsafe encodings. */ | |
50 | #define DO_MULTIBYTE (HAVE_MBLEN && ! MULTIBYTE_IS_FORMAT_SAFE) | |
51 | ||
52 | #if DO_MULTIBYTE | |
4a462e35 | 53 | # include <wchar.h> |
e65fc94b LC |
54 | static const mbstate_t mbstate_zero; |
55 | #endif | |
56 | ||
57 | #include <limits.h> | |
58 | #include <stdbool.h> | |
59 | #include <stddef.h> | |
60 | #include <stdlib.h> | |
61 | #include <string.h> | |
62 | ||
63 | #ifdef COMPILE_WIDE | |
64 | # include <endian.h> | |
65 | # define CHAR_T wchar_t | |
66 | # define UCHAR_T unsigned int | |
67 | # define L_(Str) L##Str | |
68 | # define NLW(Sym) _NL_W##Sym | |
69 | ||
70 | # define MEMCPY(d, s, n) __wmemcpy (d, s, n) | |
71 | # define STRLEN(s) __wcslen (s) | |
72 | ||
73 | #else | |
74 | # define CHAR_T char | |
75 | # define UCHAR_T unsigned char | |
76 | # define L_(Str) Str | |
77 | # define NLW(Sym) Sym | |
78 | ||
79 | # define MEMCPY(d, s, n) memcpy (d, s, n) | |
80 | # define STRLEN(s) strlen (s) | |
81 | ||
82 | # ifdef _LIBC | |
83 | # define MEMPCPY(d, s, n) __mempcpy (d, s, n) | |
84 | # else | |
85 | # ifndef HAVE_MEMPCPY | |
86 | # define MEMPCPY(d, s, n) ((void *) ((char *) memcpy (d, s, n) + (n))) | |
87 | # endif | |
88 | # endif | |
89 | #endif | |
90 | ||
91 | /* Shift A right by B bits portably, by dividing A by 2**B and | |
92 | truncating towards minus infinity. A and B should be free of side | |
93 | effects, and B should be in the range 0 <= B <= INT_BITS - 2, where | |
94 | INT_BITS is the number of useful bits in an int. GNU code can | |
95 | assume that INT_BITS is at least 32. | |
96 | ||
97 | ISO C99 says that A >> B is implementation-defined if A < 0. Some | |
98 | implementations (e.g., UNICOS 9.0 on a Cray Y-MP EL) don't shift | |
99 | right in the usual way when A < 0, so SHR falls back on division if | |
100 | ordinary A >> B doesn't seem to be the usual signed shift. */ | |
101 | #define SHR(a, b) \ | |
102 | (-1 >> 1 == -1 \ | |
103 | ? (a) >> (b) \ | |
104 | : (a) / (1 << (b)) - ((a) % (1 << (b)) < 0)) | |
105 | ||
106 | /* Bound on length of the string representing an integer type or expression T. | |
107 | Subtract 1 for the sign bit if t is signed; log10 (2.0) < 146/485; | |
108 | add 1 for integer division truncation; add 1 more for a minus sign | |
109 | if needed. */ | |
110 | #define INT_STRLEN_BOUND(t) \ | |
111 | ((sizeof (t) * CHAR_BIT - 1) * 146 / 485 + 2) | |
112 | ||
113 | #define TM_YEAR_BASE 1900 | |
114 | ||
115 | #ifndef __isleap | |
116 | /* Nonzero if YEAR is a leap year (every 4 years, | |
117 | except every 100th isn't, and every 400th is). */ | |
118 | # define __isleap(year) \ | |
119 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) | |
120 | #endif | |
121 | ||
122 | ||
123 | #ifdef _LIBC | |
124 | # define tzname __tzname | |
125 | # define tzset __tzset | |
126 | #endif | |
127 | ||
128 | #if !HAVE_TM_GMTOFF | |
129 | /* Portable standalone applications should supply a "time.h" that | |
130 | declares a POSIX-compliant localtime_r, for the benefit of older | |
131 | implementations that lack localtime_r or have a nonstandard one. | |
132 | See the gnulib time_r module for one way to implement this. */ | |
133 | # undef __gmtime_r | |
134 | # undef __localtime_r | |
135 | # define __gmtime_r gmtime_r | |
136 | # define __localtime_r localtime_r | |
137 | #endif | |
138 | ||
139 | ||
140 | #ifndef FPRINTFTIME | |
141 | # define FPRINTFTIME 0 | |
142 | #endif | |
143 | ||
144 | #if FPRINTFTIME | |
145 | # define STREAM_OR_CHAR_T FILE | |
146 | # define STRFTIME_ARG(x) /* empty */ | |
147 | #else | |
148 | # define STREAM_OR_CHAR_T CHAR_T | |
149 | # define STRFTIME_ARG(x) x, | |
150 | #endif | |
151 | ||
152 | #if FPRINTFTIME | |
153 | # define memset_byte(P, Len, Byte) \ | |
154 | do { size_t _i; for (_i = 0; _i < Len; _i++) fputc (Byte, P); } while (0) | |
155 | # define memset_space(P, Len) memset_byte (P, Len, ' ') | |
156 | # define memset_zero(P, Len) memset_byte (P, Len, '0') | |
157 | #elif defined COMPILE_WIDE | |
158 | # define memset_space(P, Len) (wmemset (P, L' ', Len), (P) += (Len)) | |
159 | # define memset_zero(P, Len) (wmemset (P, L'0', Len), (P) += (Len)) | |
160 | #else | |
161 | # define memset_space(P, Len) (memset (P, ' ', Len), (P) += (Len)) | |
162 | # define memset_zero(P, Len) (memset (P, '0', Len), (P) += (Len)) | |
163 | #endif | |
164 | ||
165 | #if FPRINTFTIME | |
166 | # define advance(P, N) | |
167 | #else | |
168 | # define advance(P, N) ((P) += (N)) | |
169 | #endif | |
170 | ||
171 | #define add(n, f) \ | |
172 | do \ | |
173 | { \ | |
174 | int _n = (n); \ | |
175 | int _delta = width - _n; \ | |
176 | int _incr = _n + (_delta > 0 ? _delta : 0); \ | |
177 | if ((size_t) _incr >= maxsize - i) \ | |
178 | return 0; \ | |
179 | if (p) \ | |
180 | { \ | |
181 | if (digits == 0 && _delta > 0) \ | |
182 | { \ | |
183 | if (pad == L_('0')) \ | |
184 | memset_zero (p, _delta); \ | |
185 | else \ | |
186 | memset_space (p, _delta); \ | |
187 | } \ | |
188 | f; \ | |
189 | advance (p, _n); \ | |
190 | } \ | |
191 | i += _incr; \ | |
192 | } while (0) | |
193 | ||
194 | #if FPRINTFTIME | |
195 | # define add1(C) add (1, fputc (C, p)) | |
196 | #else | |
197 | # define add1(C) add (1, *p = C) | |
198 | #endif | |
199 | ||
200 | #if FPRINTFTIME | |
201 | # define cpy(n, s) \ | |
202 | add ((n), \ | |
203 | if (to_lowcase) \ | |
204 | fwrite_lowcase (p, (s), _n); \ | |
205 | else if (to_uppcase) \ | |
206 | fwrite_uppcase (p, (s), _n); \ | |
207 | else \ | |
208 | fwrite ((s), _n, 1, p)) | |
209 | #else | |
210 | # define cpy(n, s) \ | |
211 | add ((n), \ | |
212 | if (to_lowcase) \ | |
213 | memcpy_lowcase (p, (s), _n LOCALE_ARG); \ | |
214 | else if (to_uppcase) \ | |
215 | memcpy_uppcase (p, (s), _n LOCALE_ARG); \ | |
216 | else \ | |
217 | MEMCPY ((void *) p, (void const *) (s), _n)) | |
218 | #endif | |
219 | ||
220 | #ifdef COMPILE_WIDE | |
221 | # ifndef USE_IN_EXTENDED_LOCALE_MODEL | |
222 | # undef __mbsrtowcs_l | |
223 | # define __mbsrtowcs_l(d, s, l, st, loc) __mbsrtowcs (d, s, l, st) | |
224 | # endif | |
225 | # define widen(os, ws, l) \ | |
226 | { \ | |
227 | mbstate_t __st; \ | |
228 | const char *__s = os; \ | |
229 | memset (&__st, '\0', sizeof (__st)); \ | |
230 | l = __mbsrtowcs_l (NULL, &__s, 0, &__st, loc); \ | |
231 | ws = (wchar_t *) alloca ((l + 1) * sizeof (wchar_t)); \ | |
232 | (void) __mbsrtowcs_l (ws, &__s, l, &__st, loc); \ | |
233 | } | |
234 | #endif | |
235 | ||
236 | ||
237 | #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL | |
238 | /* We use this code also for the extended locale handling where the | |
239 | function gets as an additional argument the locale which has to be | |
240 | used. To access the values we have to redefine the _NL_CURRENT | |
241 | macro. */ | |
242 | # define strftime __strftime_l | |
243 | # define wcsftime __wcsftime_l | |
244 | # undef _NL_CURRENT | |
245 | # define _NL_CURRENT(category, item) \ | |
246 | (current->values[_NL_ITEM_INDEX (item)].string) | |
247 | # define LOCALE_ARG , loc | |
248 | # define LOCALE_PARAM_PROTO , __locale_t loc | |
249 | # define HELPER_LOCALE_ARG , current | |
250 | #else | |
251 | # define LOCALE_PARAM_PROTO | |
252 | # define LOCALE_ARG | |
253 | # ifdef _LIBC | |
254 | # define HELPER_LOCALE_ARG , _NL_CURRENT_DATA (LC_TIME) | |
255 | # else | |
256 | # define HELPER_LOCALE_ARG | |
257 | # endif | |
258 | #endif | |
259 | ||
260 | #ifdef COMPILE_WIDE | |
261 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL | |
262 | # define TOUPPER(Ch, L) __towupper_l (Ch, L) | |
263 | # define TOLOWER(Ch, L) __towlower_l (Ch, L) | |
264 | # else | |
265 | # define TOUPPER(Ch, L) towupper (Ch) | |
266 | # define TOLOWER(Ch, L) towlower (Ch) | |
267 | # endif | |
268 | #else | |
269 | # ifdef USE_IN_EXTENDED_LOCALE_MODEL | |
270 | # define TOUPPER(Ch, L) __toupper_l (Ch, L) | |
271 | # define TOLOWER(Ch, L) __tolower_l (Ch, L) | |
272 | # else | |
273 | # define TOUPPER(Ch, L) toupper (Ch) | |
274 | # define TOLOWER(Ch, L) tolower (Ch) | |
275 | # endif | |
276 | #endif | |
277 | /* We don't use `isdigit' here since the locale dependent | |
278 | interpretation is not what we want here. We only need to accept | |
279 | the arabic digits in the ASCII range. One day there is perhaps a | |
280 | more reliable way to accept other sets of digits. */ | |
281 | #define ISDIGIT(Ch) ((unsigned int) (Ch) - L_('0') <= 9) | |
282 | ||
283 | #if FPRINTFTIME | |
284 | static void | |
285 | fwrite_lowcase (FILE *fp, const CHAR_T *src, size_t len) | |
286 | { | |
287 | while (len-- > 0) | |
288 | { | |
289 | fputc (TOLOWER ((UCHAR_T) *src, loc), fp); | |
290 | ++src; | |
291 | } | |
292 | } | |
293 | ||
294 | static void | |
295 | fwrite_uppcase (FILE *fp, const CHAR_T *src, size_t len) | |
296 | { | |
297 | while (len-- > 0) | |
298 | { | |
299 | fputc (TOUPPER ((UCHAR_T) *src, loc), fp); | |
300 | ++src; | |
301 | } | |
302 | } | |
303 | #else | |
304 | static CHAR_T * | |
305 | memcpy_lowcase (CHAR_T *dest, const CHAR_T *src, | |
306 | size_t len LOCALE_PARAM_PROTO) | |
307 | { | |
308 | while (len-- > 0) | |
309 | dest[len] = TOLOWER ((UCHAR_T) src[len], loc); | |
310 | return dest; | |
311 | } | |
312 | ||
313 | static CHAR_T * | |
314 | memcpy_uppcase (CHAR_T *dest, const CHAR_T *src, | |
315 | size_t len LOCALE_PARAM_PROTO) | |
316 | { | |
317 | while (len-- > 0) | |
318 | dest[len] = TOUPPER ((UCHAR_T) src[len], loc); | |
319 | return dest; | |
320 | } | |
321 | #endif | |
322 | ||
323 | ||
324 | #if ! HAVE_TM_GMTOFF | |
325 | /* Yield the difference between *A and *B, | |
326 | measured in seconds, ignoring leap seconds. */ | |
327 | # define tm_diff ftime_tm_diff | |
328 | static int | |
329 | tm_diff (const struct tm *a, const struct tm *b) | |
330 | { | |
331 | /* Compute intervening leap days correctly even if year is negative. | |
332 | Take care to avoid int overflow in leap day calculations, | |
333 | but it's OK to assume that A and B are close to each other. */ | |
334 | int a4 = SHR (a->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (a->tm_year & 3); | |
335 | int b4 = SHR (b->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (b->tm_year & 3); | |
336 | int a100 = a4 / 25 - (a4 % 25 < 0); | |
337 | int b100 = b4 / 25 - (b4 % 25 < 0); | |
338 | int a400 = SHR (a100, 2); | |
339 | int b400 = SHR (b100, 2); | |
340 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); | |
341 | int years = a->tm_year - b->tm_year; | |
342 | int days = (365 * years + intervening_leap_days | |
343 | + (a->tm_yday - b->tm_yday)); | |
344 | return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) | |
345 | + (a->tm_min - b->tm_min)) | |
346 | + (a->tm_sec - b->tm_sec)); | |
347 | } | |
348 | #endif /* ! HAVE_TM_GMTOFF */ | |
349 | ||
350 | ||
351 | ||
352 | /* The number of days from the first day of the first ISO week of this | |
353 | year to the year day YDAY with week day WDAY. ISO weeks start on | |
354 | Monday; the first ISO week has the year's first Thursday. YDAY may | |
355 | be as small as YDAY_MINIMUM. */ | |
356 | #define ISO_WEEK_START_WDAY 1 /* Monday */ | |
357 | #define ISO_WEEK1_WDAY 4 /* Thursday */ | |
358 | #define YDAY_MINIMUM (-366) | |
359 | #ifdef __GNUC__ | |
360 | __inline__ | |
361 | #endif | |
362 | static int | |
363 | iso_week_days (int yday, int wday) | |
364 | { | |
365 | /* Add enough to the first operand of % to make it nonnegative. */ | |
366 | int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7; | |
367 | return (yday | |
368 | - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7 | |
369 | + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY); | |
370 | } | |
371 | ||
372 | ||
373 | /* When compiling this file, GNU applications can #define my_strftime | |
374 | to a symbol (typically nstrftime) to get an extended strftime with | |
375 | extra arguments UT and NS. Emacs is a special case for now, but | |
376 | this Emacs-specific code can be removed once Emacs's config.h | |
377 | defines my_strftime. */ | |
378 | #if defined emacs && !defined my_strftime | |
379 | # define my_strftime nstrftime | |
380 | #endif | |
381 | ||
382 | #if FPRINTFTIME | |
383 | # undef my_strftime | |
384 | # define my_strftime fprintftime | |
385 | #endif | |
386 | ||
387 | #ifdef my_strftime | |
388 | # define extra_args , ut, ns | |
389 | # define extra_args_spec , int ut, int ns | |
390 | #else | |
391 | # if defined COMPILE_WIDE | |
392 | # define my_strftime wcsftime | |
393 | # define nl_get_alt_digit _nl_get_walt_digit | |
394 | # else | |
395 | # define my_strftime strftime | |
396 | # define nl_get_alt_digit _nl_get_alt_digit | |
397 | # endif | |
398 | # define extra_args | |
399 | # define extra_args_spec | |
400 | /* We don't have this information in general. */ | |
401 | # define ut 0 | |
402 | # define ns 0 | |
403 | #endif | |
404 | ||
405 | ||
406 | /* Just like my_strftime, below, but with one more parameter, UPCASE, | |
407 | to indicate that the result should be converted to upper case. */ | |
408 | static size_t | |
409 | strftime_case_ (bool upcase, STREAM_OR_CHAR_T *s, | |
410 | STRFTIME_ARG (size_t maxsize) | |
411 | const CHAR_T *format, | |
412 | const struct tm *tp extra_args_spec LOCALE_PARAM_PROTO) | |
413 | { | |
414 | #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL | |
415 | struct locale_data *const current = loc->__locales[LC_TIME]; | |
416 | #endif | |
417 | #if FPRINTFTIME | |
418 | size_t maxsize = (size_t) -1; | |
419 | #endif | |
420 | ||
421 | int hour12 = tp->tm_hour; | |
422 | #ifdef _NL_CURRENT | |
423 | /* We cannot make the following values variables since we must delay | |
424 | the evaluation of these values until really needed since some | |
425 | expressions might not be valid in every situation. The `struct tm' | |
426 | might be generated by a strptime() call that initialized | |
427 | only a few elements. Dereference the pointers only if the format | |
428 | requires this. Then it is ok to fail if the pointers are invalid. */ | |
429 | # define a_wkday \ | |
430 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABDAY_1) + tp->tm_wday)) | |
431 | # define f_wkday \ | |
432 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(DAY_1) + tp->tm_wday)) | |
433 | # define a_month \ | |
434 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABMON_1) + tp->tm_mon)) | |
435 | # define f_month \ | |
436 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(MON_1) + tp->tm_mon)) | |
437 | # define ampm \ | |
438 | ((const CHAR_T *) _NL_CURRENT (LC_TIME, tp->tm_hour > 11 \ | |
439 | ? NLW(PM_STR) : NLW(AM_STR))) | |
440 | ||
441 | # define aw_len STRLEN (a_wkday) | |
442 | # define am_len STRLEN (a_month) | |
443 | # define ap_len STRLEN (ampm) | |
444 | #endif | |
445 | const char *zone; | |
446 | size_t i = 0; | |
447 | STREAM_OR_CHAR_T *p = s; | |
448 | const CHAR_T *f; | |
449 | #if DO_MULTIBYTE && !defined COMPILE_WIDE | |
450 | const char *format_end = NULL; | |
451 | #endif | |
452 | ||
453 | #if ! defined _LIBC && ! HAVE_RUN_TZSET_TEST | |
454 | /* Solaris 2.5.x and 2.6 tzset sometimes modify the storage returned | |
455 | by localtime. On such systems, we must either use the tzset and | |
456 | localtime wrappers to work around the bug (which sets | |
457 | HAVE_RUN_TZSET_TEST) or make a copy of the structure. */ | |
458 | struct tm copy = *tp; | |
459 | tp = © | |
460 | #endif | |
461 | ||
462 | zone = NULL; | |
463 | #if HAVE_TM_ZONE | |
464 | /* The POSIX test suite assumes that setting | |
465 | the environment variable TZ to a new value before calling strftime() | |
466 | will influence the result (the %Z format) even if the information in | |
467 | TP is computed with a totally different time zone. | |
468 | This is bogus: though POSIX allows bad behavior like this, | |
469 | POSIX does not require it. Do the right thing instead. */ | |
470 | zone = (const char *) tp->tm_zone; | |
471 | #endif | |
472 | #if HAVE_TZNAME | |
473 | if (ut) | |
474 | { | |
475 | if (! (zone && *zone)) | |
476 | zone = "GMT"; | |
477 | } | |
478 | else | |
479 | { | |
480 | /* POSIX.1 requires that local time zone information be used as | |
481 | though strftime called tzset. */ | |
482 | # if HAVE_TZSET | |
483 | tzset (); | |
484 | # endif | |
485 | } | |
486 | #endif | |
487 | ||
488 | if (hour12 > 12) | |
489 | hour12 -= 12; | |
490 | else | |
491 | if (hour12 == 0) | |
492 | hour12 = 12; | |
493 | ||
494 | for (f = format; *f != '\0'; ++f) | |
495 | { | |
496 | int pad = 0; /* Padding for number ('-', '_', or 0). */ | |
497 | int modifier; /* Field modifier ('E', 'O', or 0). */ | |
498 | int digits = 0; /* Max digits for numeric format. */ | |
499 | int number_value; /* Numeric value to be printed. */ | |
500 | unsigned int u_number_value; /* (unsigned int) number_value. */ | |
501 | bool negative_number; /* The number is negative. */ | |
502 | bool always_output_a_sign; /* +/- should always be output. */ | |
503 | int tz_colon_mask; /* Bitmask of where ':' should appear. */ | |
504 | const CHAR_T *subfmt; | |
505 | CHAR_T sign_char; | |
506 | CHAR_T *bufp; | |
507 | CHAR_T buf[1 | |
508 | + 2 /* for the two colons in a %::z or %:::z time zone */ | |
509 | + (sizeof (int) < sizeof (time_t) | |
510 | ? INT_STRLEN_BOUND (time_t) | |
511 | : INT_STRLEN_BOUND (int))]; | |
512 | int width = -1; | |
513 | bool to_lowcase = false; | |
514 | bool to_uppcase = upcase; | |
515 | size_t colons; | |
516 | bool change_case = false; | |
517 | int format_char; | |
518 | ||
519 | #if DO_MULTIBYTE && !defined COMPILE_WIDE | |
520 | switch (*f) | |
521 | { | |
522 | case L_('%'): | |
523 | break; | |
524 | ||
525 | case L_('\b'): case L_('\t'): case L_('\n'): | |
526 | case L_('\v'): case L_('\f'): case L_('\r'): | |
527 | case L_(' '): case L_('!'): case L_('"'): case L_('#'): case L_('&'): | |
528 | case L_('\''): case L_('('): case L_(')'): case L_('*'): case L_('+'): | |
529 | case L_(','): case L_('-'): case L_('.'): case L_('/'): case L_('0'): | |
530 | case L_('1'): case L_('2'): case L_('3'): case L_('4'): case L_('5'): | |
531 | case L_('6'): case L_('7'): case L_('8'): case L_('9'): case L_(':'): | |
532 | case L_(';'): case L_('<'): case L_('='): case L_('>'): case L_('?'): | |
533 | case L_('A'): case L_('B'): case L_('C'): case L_('D'): case L_('E'): | |
534 | case L_('F'): case L_('G'): case L_('H'): case L_('I'): case L_('J'): | |
535 | case L_('K'): case L_('L'): case L_('M'): case L_('N'): case L_('O'): | |
536 | case L_('P'): case L_('Q'): case L_('R'): case L_('S'): case L_('T'): | |
537 | case L_('U'): case L_('V'): case L_('W'): case L_('X'): case L_('Y'): | |
538 | case L_('Z'): case L_('['): case L_('\\'): case L_(']'): case L_('^'): | |
539 | case L_('_'): case L_('a'): case L_('b'): case L_('c'): case L_('d'): | |
540 | case L_('e'): case L_('f'): case L_('g'): case L_('h'): case L_('i'): | |
541 | case L_('j'): case L_('k'): case L_('l'): case L_('m'): case L_('n'): | |
542 | case L_('o'): case L_('p'): case L_('q'): case L_('r'): case L_('s'): | |
543 | case L_('t'): case L_('u'): case L_('v'): case L_('w'): case L_('x'): | |
544 | case L_('y'): case L_('z'): case L_('{'): case L_('|'): case L_('}'): | |
545 | case L_('~'): | |
546 | /* The C Standard requires these 98 characters (plus '%') to | |
547 | be in the basic execution character set. None of these | |
548 | characters can start a multibyte sequence, so they need | |
549 | not be analyzed further. */ | |
550 | add1 (*f); | |
551 | continue; | |
552 | ||
553 | default: | |
554 | /* Copy this multibyte sequence until we reach its end, find | |
555 | an error, or come back to the initial shift state. */ | |
556 | { | |
557 | mbstate_t mbstate = mbstate_zero; | |
558 | size_t len = 0; | |
559 | size_t fsize; | |
560 | ||
561 | if (! format_end) | |
562 | format_end = f + strlen (f) + 1; | |
563 | fsize = format_end - f; | |
564 | ||
565 | do | |
566 | { | |
567 | size_t bytes = mbrlen (f + len, fsize - len, &mbstate); | |
568 | ||
569 | if (bytes == 0) | |
570 | break; | |
571 | ||
572 | if (bytes == (size_t) -2) | |
573 | { | |
574 | len += strlen (f + len); | |
575 | break; | |
576 | } | |
577 | ||
578 | if (bytes == (size_t) -1) | |
579 | { | |
580 | len++; | |
581 | break; | |
582 | } | |
583 | ||
584 | len += bytes; | |
585 | } | |
586 | while (! mbsinit (&mbstate)); | |
587 | ||
588 | cpy (len, f); | |
589 | f += len - 1; | |
590 | continue; | |
591 | } | |
592 | } | |
593 | ||
594 | #else /* ! DO_MULTIBYTE */ | |
595 | ||
596 | /* Either multibyte encodings are not supported, they are | |
597 | safe for formats, so any non-'%' byte can be copied through, | |
598 | or this is the wide character version. */ | |
599 | if (*f != L_('%')) | |
600 | { | |
601 | add1 (*f); | |
602 | continue; | |
603 | } | |
604 | ||
605 | #endif /* ! DO_MULTIBYTE */ | |
606 | ||
607 | /* Check for flags that can modify a format. */ | |
608 | while (1) | |
609 | { | |
610 | switch (*++f) | |
611 | { | |
612 | /* This influences the number formats. */ | |
613 | case L_('_'): | |
614 | case L_('-'): | |
615 | case L_('0'): | |
616 | pad = *f; | |
617 | continue; | |
618 | ||
619 | /* This changes textual output. */ | |
620 | case L_('^'): | |
621 | to_uppcase = true; | |
622 | continue; | |
623 | case L_('#'): | |
624 | change_case = true; | |
625 | continue; | |
626 | ||
627 | default: | |
628 | break; | |
629 | } | |
630 | break; | |
631 | } | |
632 | ||
633 | /* As a GNU extension we allow to specify the field width. */ | |
634 | if (ISDIGIT (*f)) | |
635 | { | |
636 | width = 0; | |
637 | do | |
638 | { | |
639 | if (width > INT_MAX / 10 | |
640 | || (width == INT_MAX / 10 && *f - L_('0') > INT_MAX % 10)) | |
641 | /* Avoid overflow. */ | |
642 | width = INT_MAX; | |
643 | else | |
644 | { | |
645 | width *= 10; | |
646 | width += *f - L_('0'); | |
647 | } | |
648 | ++f; | |
649 | } | |
650 | while (ISDIGIT (*f)); | |
651 | } | |
652 | ||
653 | /* Check for modifiers. */ | |
654 | switch (*f) | |
655 | { | |
656 | case L_('E'): | |
657 | case L_('O'): | |
658 | modifier = *f++; | |
659 | break; | |
660 | ||
661 | default: | |
662 | modifier = 0; | |
663 | break; | |
664 | } | |
665 | ||
666 | /* Now do the specified format. */ | |
667 | format_char = *f; | |
668 | switch (format_char) | |
669 | { | |
670 | #define DO_NUMBER(d, v) \ | |
671 | digits = d; \ | |
672 | number_value = v; goto do_number | |
673 | #define DO_SIGNED_NUMBER(d, negative, v) \ | |
674 | digits = d; \ | |
675 | negative_number = negative; \ | |
676 | u_number_value = v; goto do_signed_number | |
677 | ||
678 | /* The mask is not what you might think. | |
679 | When the ordinal i'th bit is set, insert a colon | |
680 | before the i'th digit of the time zone representation. */ | |
681 | #define DO_TZ_OFFSET(d, negative, mask, v) \ | |
682 | digits = d; \ | |
683 | negative_number = negative; \ | |
684 | tz_colon_mask = mask; \ | |
685 | u_number_value = v; goto do_tz_offset | |
686 | #define DO_NUMBER_SPACEPAD(d, v) \ | |
687 | digits = d; \ | |
688 | number_value = v; goto do_number_spacepad | |
689 | ||
690 | case L_('%'): | |
691 | if (modifier != 0) | |
692 | goto bad_format; | |
693 | add1 (*f); | |
694 | break; | |
695 | ||
696 | case L_('a'): | |
697 | if (modifier != 0) | |
698 | goto bad_format; | |
699 | if (change_case) | |
700 | { | |
701 | to_uppcase = true; | |
702 | to_lowcase = false; | |
703 | } | |
704 | #ifdef _NL_CURRENT | |
705 | cpy (aw_len, a_wkday); | |
706 | break; | |
707 | #else | |
708 | goto underlying_strftime; | |
709 | #endif | |
710 | ||
711 | case 'A': | |
712 | if (modifier != 0) | |
713 | goto bad_format; | |
714 | if (change_case) | |
715 | { | |
716 | to_uppcase = true; | |
717 | to_lowcase = false; | |
718 | } | |
719 | #ifdef _NL_CURRENT | |
720 | cpy (STRLEN (f_wkday), f_wkday); | |
721 | break; | |
722 | #else | |
723 | goto underlying_strftime; | |
724 | #endif | |
725 | ||
726 | case L_('b'): | |
727 | case L_('h'): | |
728 | if (change_case) | |
729 | { | |
730 | to_uppcase = true; | |
731 | to_lowcase = false; | |
732 | } | |
733 | if (modifier != 0) | |
734 | goto bad_format; | |
735 | #ifdef _NL_CURRENT | |
736 | cpy (am_len, a_month); | |
737 | break; | |
738 | #else | |
739 | goto underlying_strftime; | |
740 | #endif | |
741 | ||
742 | case L_('B'): | |
743 | if (modifier != 0) | |
744 | goto bad_format; | |
745 | if (change_case) | |
746 | { | |
747 | to_uppcase = true; | |
748 | to_lowcase = false; | |
749 | } | |
750 | #ifdef _NL_CURRENT | |
751 | cpy (STRLEN (f_month), f_month); | |
752 | break; | |
753 | #else | |
754 | goto underlying_strftime; | |
755 | #endif | |
756 | ||
757 | case L_('c'): | |
758 | if (modifier == L_('O')) | |
759 | goto bad_format; | |
760 | #ifdef _NL_CURRENT | |
761 | if (! (modifier == 'E' | |
762 | && (*(subfmt = | |
763 | (const CHAR_T *) _NL_CURRENT (LC_TIME, | |
764 | NLW(ERA_D_T_FMT))) | |
765 | != '\0'))) | |
766 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_T_FMT)); | |
767 | #else | |
768 | goto underlying_strftime; | |
769 | #endif | |
770 | ||
771 | subformat: | |
772 | { | |
773 | size_t len = strftime_case_ (to_uppcase, | |
774 | NULL, STRFTIME_ARG ((size_t) -1) | |
775 | subfmt, | |
776 | tp extra_args LOCALE_ARG); | |
777 | add (len, strftime_case_ (to_uppcase, p, | |
778 | STRFTIME_ARG (maxsize - i) | |
779 | subfmt, | |
780 | tp extra_args LOCALE_ARG)); | |
781 | } | |
782 | break; | |
783 | ||
784 | #if !(defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY) | |
785 | underlying_strftime: | |
786 | { | |
787 | /* The relevant information is available only via the | |
788 | underlying strftime implementation, so use that. */ | |
789 | char ufmt[5]; | |
790 | char *u = ufmt; | |
791 | char ubuf[1024]; /* enough for any single format in practice */ | |
792 | size_t len; | |
793 | /* Make sure we're calling the actual underlying strftime. | |
794 | In some cases, config.h contains something like | |
795 | "#define strftime rpl_strftime". */ | |
796 | # ifdef strftime | |
797 | # undef strftime | |
798 | size_t strftime (); | |
799 | # endif | |
800 | ||
801 | /* The space helps distinguish strftime failure from empty | |
802 | output. */ | |
803 | *u++ = ' '; | |
804 | *u++ = '%'; | |
805 | if (modifier != 0) | |
806 | *u++ = modifier; | |
807 | *u++ = format_char; | |
808 | *u = '\0'; | |
809 | len = strftime (ubuf, sizeof ubuf, ufmt, tp); | |
810 | if (len != 0) | |
811 | cpy (len - 1, ubuf + 1); | |
812 | } | |
813 | break; | |
814 | #endif | |
815 | ||
816 | case L_('C'): | |
817 | if (modifier == L_('O')) | |
818 | goto bad_format; | |
819 | if (modifier == L_('E')) | |
820 | { | |
821 | #if HAVE_STRUCT_ERA_ENTRY | |
822 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); | |
823 | if (era) | |
824 | { | |
825 | # ifdef COMPILE_WIDE | |
826 | size_t len = __wcslen (era->era_wname); | |
827 | cpy (len, era->era_wname); | |
828 | # else | |
829 | size_t len = strlen (era->era_name); | |
830 | cpy (len, era->era_name); | |
831 | # endif | |
832 | break; | |
833 | } | |
834 | #else | |
835 | goto underlying_strftime; | |
836 | #endif | |
837 | } | |
838 | ||
839 | { | |
840 | int century = tp->tm_year / 100 + TM_YEAR_BASE / 100; | |
841 | century -= tp->tm_year % 100 < 0 && 0 < century; | |
842 | DO_SIGNED_NUMBER (2, tp->tm_year < - TM_YEAR_BASE, century); | |
843 | } | |
844 | ||
845 | case L_('x'): | |
846 | if (modifier == L_('O')) | |
847 | goto bad_format; | |
848 | #ifdef _NL_CURRENT | |
849 | if (! (modifier == L_('E') | |
850 | && (*(subfmt = | |
851 | (const CHAR_T *)_NL_CURRENT (LC_TIME, NLW(ERA_D_FMT))) | |
852 | != L_('\0')))) | |
853 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_FMT)); | |
854 | goto subformat; | |
855 | #else | |
856 | goto underlying_strftime; | |
857 | #endif | |
858 | case L_('D'): | |
859 | if (modifier != 0) | |
860 | goto bad_format; | |
861 | subfmt = L_("%m/%d/%y"); | |
862 | goto subformat; | |
863 | ||
864 | case L_('d'): | |
865 | if (modifier == L_('E')) | |
866 | goto bad_format; | |
867 | ||
868 | DO_NUMBER (2, tp->tm_mday); | |
869 | ||
870 | case L_('e'): | |
871 | if (modifier == L_('E')) | |
872 | goto bad_format; | |
873 | ||
874 | DO_NUMBER_SPACEPAD (2, tp->tm_mday); | |
875 | ||
876 | /* All numeric formats set DIGITS and NUMBER_VALUE (or U_NUMBER_VALUE) | |
877 | and then jump to one of these labels. */ | |
878 | ||
879 | do_tz_offset: | |
880 | always_output_a_sign = true; | |
881 | goto do_number_body; | |
882 | ||
883 | do_number_spacepad: | |
884 | /* Force `_' flag unless overridden by `0' or `-' flag. */ | |
885 | if (pad != L_('0') && pad != L_('-')) | |
886 | pad = L_('_'); | |
887 | ||
888 | do_number: | |
889 | /* Format NUMBER_VALUE according to the MODIFIER flag. */ | |
890 | negative_number = number_value < 0; | |
891 | u_number_value = number_value; | |
892 | ||
893 | do_signed_number: | |
894 | always_output_a_sign = false; | |
895 | tz_colon_mask = 0; | |
896 | ||
897 | do_number_body: | |
898 | /* Format U_NUMBER_VALUE according to the MODIFIER flag. | |
899 | NEGATIVE_NUMBER is nonzero if the original number was | |
900 | negative; in this case it was converted directly to | |
901 | unsigned int (i.e., modulo (UINT_MAX + 1)) without | |
902 | negating it. */ | |
903 | if (modifier == L_('O') && !negative_number) | |
904 | { | |
905 | #ifdef _NL_CURRENT | |
906 | /* Get the locale specific alternate representation of | |
907 | the number. If none exist NULL is returned. */ | |
908 | const CHAR_T *cp = nl_get_alt_digit (u_number_value | |
909 | HELPER_LOCALE_ARG); | |
910 | ||
911 | if (cp != NULL) | |
912 | { | |
913 | size_t digitlen = STRLEN (cp); | |
914 | if (digitlen != 0) | |
915 | { | |
916 | cpy (digitlen, cp); | |
917 | break; | |
918 | } | |
919 | } | |
920 | #else | |
921 | goto underlying_strftime; | |
922 | #endif | |
923 | } | |
924 | ||
925 | bufp = buf + sizeof (buf) / sizeof (buf[0]); | |
926 | ||
927 | if (negative_number) | |
928 | u_number_value = - u_number_value; | |
929 | ||
930 | do | |
931 | { | |
932 | if (tz_colon_mask & 1) | |
933 | *--bufp = ':'; | |
934 | tz_colon_mask >>= 1; | |
935 | *--bufp = u_number_value % 10 + L_('0'); | |
936 | u_number_value /= 10; | |
937 | } | |
938 | while (u_number_value != 0 || tz_colon_mask != 0); | |
939 | ||
940 | do_number_sign_and_padding: | |
941 | if (digits < width) | |
942 | digits = width; | |
943 | ||
944 | sign_char = (negative_number ? L_('-') | |
945 | : always_output_a_sign ? L_('+') | |
946 | : 0); | |
947 | ||
948 | if (pad == L_('-')) | |
949 | { | |
950 | if (sign_char) | |
951 | add1 (sign_char); | |
952 | } | |
953 | else | |
954 | { | |
955 | int padding = digits - (buf + (sizeof (buf) / sizeof (buf[0])) | |
956 | - bufp) - !!sign_char; | |
957 | ||
958 | if (padding > 0) | |
959 | { | |
960 | if (pad == L_('_')) | |
961 | { | |
962 | if ((size_t) padding >= maxsize - i) | |
963 | return 0; | |
964 | ||
965 | if (p) | |
966 | memset_space (p, padding); | |
967 | i += padding; | |
968 | width = width > padding ? width - padding : 0; | |
969 | if (sign_char) | |
970 | add1 (sign_char); | |
971 | } | |
972 | else | |
973 | { | |
974 | if ((size_t) digits >= maxsize - i) | |
975 | return 0; | |
976 | ||
977 | if (sign_char) | |
978 | add1 (sign_char); | |
979 | ||
980 | if (p) | |
981 | memset_zero (p, padding); | |
982 | i += padding; | |
983 | width = 0; | |
984 | } | |
985 | } | |
986 | else | |
987 | { | |
988 | if (sign_char) | |
989 | add1 (sign_char); | |
990 | } | |
991 | } | |
992 | ||
993 | cpy (buf + sizeof (buf) / sizeof (buf[0]) - bufp, bufp); | |
994 | break; | |
995 | ||
996 | case L_('F'): | |
997 | if (modifier != 0) | |
998 | goto bad_format; | |
999 | subfmt = L_("%Y-%m-%d"); | |
1000 | goto subformat; | |
1001 | ||
1002 | case L_('H'): | |
1003 | if (modifier == L_('E')) | |
1004 | goto bad_format; | |
1005 | ||
1006 | DO_NUMBER (2, tp->tm_hour); | |
1007 | ||
1008 | case L_('I'): | |
1009 | if (modifier == L_('E')) | |
1010 | goto bad_format; | |
1011 | ||
1012 | DO_NUMBER (2, hour12); | |
1013 | ||
1014 | case L_('k'): /* GNU extension. */ | |
1015 | if (modifier == L_('E')) | |
1016 | goto bad_format; | |
1017 | ||
1018 | DO_NUMBER_SPACEPAD (2, tp->tm_hour); | |
1019 | ||
1020 | case L_('l'): /* GNU extension. */ | |
1021 | if (modifier == L_('E')) | |
1022 | goto bad_format; | |
1023 | ||
1024 | DO_NUMBER_SPACEPAD (2, hour12); | |
1025 | ||
1026 | case L_('j'): | |
1027 | if (modifier == L_('E')) | |
1028 | goto bad_format; | |
1029 | ||
1030 | DO_SIGNED_NUMBER (3, tp->tm_yday < -1, tp->tm_yday + 1U); | |
1031 | ||
1032 | case L_('M'): | |
1033 | if (modifier == L_('E')) | |
1034 | goto bad_format; | |
1035 | ||
1036 | DO_NUMBER (2, tp->tm_min); | |
1037 | ||
1038 | case L_('m'): | |
1039 | if (modifier == L_('E')) | |
1040 | goto bad_format; | |
1041 | ||
1042 | DO_SIGNED_NUMBER (2, tp->tm_mon < -1, tp->tm_mon + 1U); | |
1043 | ||
1044 | #ifndef _LIBC | |
1045 | case L_('N'): /* GNU extension. */ | |
1046 | if (modifier == L_('E')) | |
1047 | goto bad_format; | |
1048 | ||
1049 | number_value = ns; | |
1050 | if (width == -1) | |
1051 | width = 9; | |
1052 | else | |
1053 | { | |
1054 | /* Take an explicit width less than 9 as a precision. */ | |
1055 | int j; | |
1056 | for (j = width; j < 9; j++) | |
1057 | number_value /= 10; | |
1058 | } | |
1059 | ||
1060 | DO_NUMBER (width, number_value); | |
1061 | #endif | |
1062 | ||
1063 | case L_('n'): | |
1064 | add1 (L_('\n')); | |
1065 | break; | |
1066 | ||
1067 | case L_('P'): | |
1068 | to_lowcase = true; | |
1069 | #ifndef _NL_CURRENT | |
1070 | format_char = L_('p'); | |
1071 | #endif | |
1072 | /* FALLTHROUGH */ | |
1073 | ||
1074 | case L_('p'): | |
1075 | if (change_case) | |
1076 | { | |
1077 | to_uppcase = false; | |
1078 | to_lowcase = true; | |
1079 | } | |
1080 | #ifdef _NL_CURRENT | |
1081 | cpy (ap_len, ampm); | |
1082 | break; | |
1083 | #else | |
1084 | goto underlying_strftime; | |
1085 | #endif | |
1086 | ||
1087 | case L_('R'): | |
1088 | subfmt = L_("%H:%M"); | |
1089 | goto subformat; | |
1090 | ||
1091 | case L_('r'): | |
1092 | #ifdef _NL_CURRENT | |
1093 | if (*(subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, | |
1094 | NLW(T_FMT_AMPM))) | |
1095 | == L_('\0')) | |
1096 | subfmt = L_("%I:%M:%S %p"); | |
1097 | goto subformat; | |
1098 | #else | |
1099 | goto underlying_strftime; | |
1100 | #endif | |
1101 | ||
1102 | case L_('S'): | |
1103 | if (modifier == L_('E')) | |
1104 | goto bad_format; | |
1105 | ||
1106 | DO_NUMBER (2, tp->tm_sec); | |
1107 | ||
1108 | case L_('s'): /* GNU extension. */ | |
1109 | { | |
1110 | struct tm ltm; | |
1111 | time_t t; | |
1112 | ||
1113 | ltm = *tp; | |
1114 | t = mktime (<m); | |
1115 | ||
1116 | /* Generate string value for T using time_t arithmetic; | |
1117 | this works even if sizeof (long) < sizeof (time_t). */ | |
1118 | ||
1119 | bufp = buf + sizeof (buf) / sizeof (buf[0]); | |
1120 | negative_number = t < 0; | |
1121 | ||
1122 | do | |
1123 | { | |
1124 | int d = t % 10; | |
1125 | t /= 10; | |
1126 | *--bufp = (negative_number ? -d : d) + L_('0'); | |
1127 | } | |
1128 | while (t != 0); | |
1129 | ||
1130 | digits = 1; | |
1131 | always_output_a_sign = false; | |
1132 | goto do_number_sign_and_padding; | |
1133 | } | |
1134 | ||
1135 | case L_('X'): | |
1136 | if (modifier == L_('O')) | |
1137 | goto bad_format; | |
1138 | #ifdef _NL_CURRENT | |
1139 | if (! (modifier == L_('E') | |
1140 | && (*(subfmt = | |
1141 | (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ERA_T_FMT))) | |
1142 | != L_('\0')))) | |
1143 | subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(T_FMT)); | |
1144 | goto subformat; | |
1145 | #else | |
1146 | goto underlying_strftime; | |
1147 | #endif | |
1148 | case L_('T'): | |
1149 | subfmt = L_("%H:%M:%S"); | |
1150 | goto subformat; | |
1151 | ||
1152 | case L_('t'): | |
1153 | add1 (L_('\t')); | |
1154 | break; | |
1155 | ||
1156 | case L_('u'): | |
1157 | DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1); | |
1158 | ||
1159 | case L_('U'): | |
1160 | if (modifier == L_('E')) | |
1161 | goto bad_format; | |
1162 | ||
1163 | DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7); | |
1164 | ||
1165 | case L_('V'): | |
1166 | case L_('g'): | |
1167 | case L_('G'): | |
1168 | if (modifier == L_('E')) | |
1169 | goto bad_format; | |
1170 | { | |
1171 | /* YEAR is a leap year if and only if (tp->tm_year + TM_YEAR_BASE) | |
1172 | is a leap year, except that YEAR and YEAR - 1 both work | |
1173 | correctly even when (tp->tm_year + TM_YEAR_BASE) would | |
1174 | overflow. */ | |
1175 | int year = (tp->tm_year | |
1176 | + (tp->tm_year < 0 | |
1177 | ? TM_YEAR_BASE % 400 | |
1178 | : TM_YEAR_BASE % 400 - 400)); | |
1179 | int year_adjust = 0; | |
1180 | int days = iso_week_days (tp->tm_yday, tp->tm_wday); | |
1181 | ||
1182 | if (days < 0) | |
1183 | { | |
1184 | /* This ISO week belongs to the previous year. */ | |
1185 | year_adjust = -1; | |
1186 | days = iso_week_days (tp->tm_yday + (365 + __isleap (year - 1)), | |
1187 | tp->tm_wday); | |
1188 | } | |
1189 | else | |
1190 | { | |
1191 | int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)), | |
1192 | tp->tm_wday); | |
1193 | if (0 <= d) | |
1194 | { | |
1195 | /* This ISO week belongs to the next year. */ | |
1196 | year_adjust = 1; | |
1197 | days = d; | |
1198 | } | |
1199 | } | |
1200 | ||
1201 | switch (*f) | |
1202 | { | |
1203 | case L_('g'): | |
1204 | { | |
1205 | int yy = (tp->tm_year % 100 + year_adjust) % 100; | |
1206 | DO_NUMBER (2, (0 <= yy | |
1207 | ? yy | |
1208 | : tp->tm_year < -TM_YEAR_BASE - year_adjust | |
1209 | ? -yy | |
1210 | : yy + 100)); | |
1211 | } | |
1212 | ||
1213 | case L_('G'): | |
1214 | DO_SIGNED_NUMBER (4, tp->tm_year < -TM_YEAR_BASE - year_adjust, | |
1215 | (tp->tm_year + (unsigned int) TM_YEAR_BASE | |
1216 | + year_adjust)); | |
1217 | ||
1218 | default: | |
1219 | DO_NUMBER (2, days / 7 + 1); | |
1220 | } | |
1221 | } | |
1222 | ||
1223 | case L_('W'): | |
1224 | if (modifier == L_('E')) | |
1225 | goto bad_format; | |
1226 | ||
1227 | DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7); | |
1228 | ||
1229 | case L_('w'): | |
1230 | if (modifier == L_('E')) | |
1231 | goto bad_format; | |
1232 | ||
1233 | DO_NUMBER (1, tp->tm_wday); | |
1234 | ||
1235 | case L_('Y'): | |
1236 | if (modifier == 'E') | |
1237 | { | |
1238 | #if HAVE_STRUCT_ERA_ENTRY | |
1239 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); | |
1240 | if (era) | |
1241 | { | |
1242 | # ifdef COMPILE_WIDE | |
1243 | subfmt = era->era_wformat; | |
1244 | # else | |
1245 | subfmt = era->era_format; | |
1246 | # endif | |
1247 | goto subformat; | |
1248 | } | |
1249 | #else | |
1250 | goto underlying_strftime; | |
1251 | #endif | |
1252 | } | |
1253 | if (modifier == L_('O')) | |
1254 | goto bad_format; | |
1255 | else | |
1256 | DO_SIGNED_NUMBER (4, tp->tm_year < -TM_YEAR_BASE, | |
1257 | tp->tm_year + (unsigned int) TM_YEAR_BASE); | |
1258 | ||
1259 | case L_('y'): | |
1260 | if (modifier == L_('E')) | |
1261 | { | |
1262 | #if HAVE_STRUCT_ERA_ENTRY | |
1263 | struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG); | |
1264 | if (era) | |
1265 | { | |
1266 | int delta = tp->tm_year - era->start_date[0]; | |
1267 | DO_NUMBER (1, (era->offset | |
1268 | + delta * era->absolute_direction)); | |
1269 | } | |
1270 | #else | |
1271 | goto underlying_strftime; | |
1272 | #endif | |
1273 | } | |
1274 | ||
1275 | { | |
1276 | int yy = tp->tm_year % 100; | |
1277 | if (yy < 0) | |
1278 | yy = tp->tm_year < - TM_YEAR_BASE ? -yy : yy + 100; | |
1279 | DO_NUMBER (2, yy); | |
1280 | } | |
1281 | ||
1282 | case L_('Z'): | |
1283 | if (change_case) | |
1284 | { | |
1285 | to_uppcase = false; | |
1286 | to_lowcase = true; | |
1287 | } | |
1288 | ||
1289 | #if HAVE_TZNAME | |
1290 | /* The tzset() call might have changed the value. */ | |
1291 | if (!(zone && *zone) && tp->tm_isdst >= 0) | |
1292 | zone = tzname[tp->tm_isdst != 0]; | |
1293 | #endif | |
1294 | if (! zone) | |
1295 | zone = ""; | |
1296 | ||
1297 | #ifdef COMPILE_WIDE | |
1298 | { | |
1299 | /* The zone string is always given in multibyte form. We have | |
1300 | to transform it first. */ | |
1301 | wchar_t *wczone; | |
1302 | size_t len; | |
1303 | widen (zone, wczone, len); | |
1304 | cpy (len, wczone); | |
1305 | } | |
1306 | #else | |
1307 | cpy (strlen (zone), zone); | |
1308 | #endif | |
1309 | break; | |
1310 | ||
1311 | case L_(':'): | |
1312 | /* :, ::, and ::: are valid only just before 'z'. | |
1313 | :::: etc. are rejected later. */ | |
1314 | for (colons = 1; f[colons] == L_(':'); colons++) | |
1315 | continue; | |
1316 | if (f[colons] != L_('z')) | |
1317 | goto bad_format; | |
1318 | f += colons; | |
1319 | goto do_z_conversion; | |
1320 | ||
1321 | case L_('z'): | |
1322 | colons = 0; | |
1323 | ||
1324 | do_z_conversion: | |
1325 | if (tp->tm_isdst < 0) | |
1326 | break; | |
1327 | ||
1328 | { | |
1329 | int diff; | |
1330 | int hour_diff; | |
1331 | int min_diff; | |
1332 | int sec_diff; | |
1333 | #if HAVE_TM_GMTOFF | |
1334 | diff = tp->tm_gmtoff; | |
1335 | #else | |
1336 | if (ut) | |
1337 | diff = 0; | |
1338 | else | |
1339 | { | |
1340 | struct tm gtm; | |
1341 | struct tm ltm; | |
1342 | time_t lt; | |
1343 | ||
1344 | ltm = *tp; | |
1345 | lt = mktime (<m); | |
1346 | ||
1347 | if (lt == (time_t) -1) | |
1348 | { | |
1349 | /* mktime returns -1 for errors, but -1 is also a | |
1350 | valid time_t value. Check whether an error really | |
1351 | occurred. */ | |
1352 | struct tm tm; | |
1353 | ||
1354 | if (! __localtime_r (<, &tm) | |
1355 | || ((ltm.tm_sec ^ tm.tm_sec) | |
1356 | | (ltm.tm_min ^ tm.tm_min) | |
1357 | | (ltm.tm_hour ^ tm.tm_hour) | |
1358 | | (ltm.tm_mday ^ tm.tm_mday) | |
1359 | | (ltm.tm_mon ^ tm.tm_mon) | |
1360 | | (ltm.tm_year ^ tm.tm_year))) | |
1361 | break; | |
1362 | } | |
1363 | ||
1364 | if (! __gmtime_r (<, >m)) | |
1365 | break; | |
1366 | ||
1367 | diff = tm_diff (<m, >m); | |
1368 | } | |
1369 | #endif | |
1370 | ||
1371 | hour_diff = diff / 60 / 60; | |
1372 | min_diff = diff / 60 % 60; | |
1373 | sec_diff = diff % 60; | |
1374 | ||
1375 | switch (colons) | |
1376 | { | |
1377 | case 0: /* +hhmm */ | |
1378 | DO_TZ_OFFSET (5, diff < 0, 0, hour_diff * 100 + min_diff); | |
1379 | ||
1380 | case 1: tz_hh_mm: /* +hh:mm */ | |
1381 | DO_TZ_OFFSET (6, diff < 0, 04, hour_diff * 100 + min_diff); | |
1382 | ||
1383 | case 2: tz_hh_mm_ss: /* +hh:mm:ss */ | |
1384 | DO_TZ_OFFSET (9, diff < 0, 024, | |
1385 | hour_diff * 10000 + min_diff * 100 + sec_diff); | |
1386 | ||
1387 | case 3: /* +hh if possible, else +hh:mm, else +hh:mm:ss */ | |
1388 | if (sec_diff != 0) | |
1389 | goto tz_hh_mm_ss; | |
1390 | if (min_diff != 0) | |
1391 | goto tz_hh_mm; | |
1392 | DO_TZ_OFFSET (3, diff < 0, 0, hour_diff); | |
1393 | ||
1394 | default: | |
1395 | goto bad_format; | |
1396 | } | |
1397 | } | |
1398 | ||
1399 | case L_('\0'): /* GNU extension: % at end of format. */ | |
1400 | --f; | |
1401 | /* Fall through. */ | |
1402 | default: | |
1403 | /* Unknown format; output the format, including the '%', | |
1404 | since this is most likely the right thing to do if a | |
1405 | multibyte string has been misparsed. */ | |
1406 | bad_format: | |
1407 | { | |
1408 | int flen; | |
1409 | for (flen = 1; f[1 - flen] != L_('%'); flen++) | |
1410 | continue; | |
1411 | cpy (flen, &f[1 - flen]); | |
1412 | } | |
1413 | break; | |
1414 | } | |
1415 | } | |
1416 | ||
1417 | #if ! FPRINTFTIME | |
1418 | if (p && maxsize != 0) | |
1419 | *p = L_('\0'); | |
1420 | #endif | |
1421 | ||
1422 | return i; | |
1423 | } | |
1424 | ||
1425 | /* Write information from TP into S according to the format | |
1426 | string FORMAT, writing no more that MAXSIZE characters | |
1427 | (including the terminating '\0') and returning number of | |
1428 | characters written. If S is NULL, nothing will be written | |
1429 | anywhere, so to determine how many characters would be | |
1430 | written, use NULL for S and (size_t) -1 for MAXSIZE. */ | |
1431 | size_t | |
1432 | my_strftime (STREAM_OR_CHAR_T *s, STRFTIME_ARG (size_t maxsize) | |
1433 | const CHAR_T *format, | |
1434 | const struct tm *tp extra_args_spec LOCALE_PARAM_PROTO) | |
1435 | { | |
1436 | return strftime_case_ (false, s, STRFTIME_ARG (maxsize) | |
1437 | format, tp extra_args LOCALE_ARG); | |
1438 | } | |
1439 | ||
1440 | #if defined _LIBC && ! FPRINTFTIME | |
1441 | libc_hidden_def (my_strftime) | |
1442 | #endif | |
1443 | ||
1444 | ||
1445 | #if defined emacs && ! FPRINTFTIME | |
1446 | /* For Emacs we have a separate interface which corresponds to the normal | |
1447 | strftime function plus the ut argument, but without the ns argument. */ | |
1448 | size_t | |
1449 | emacs_strftimeu (char *s, size_t maxsize, const char *format, | |
1450 | const struct tm *tp, int ut) | |
1451 | { | |
1452 | return my_strftime (s, maxsize, format, tp, ut, 0); | |
1453 | } | |
1454 | #endif |