1 /* Copyright (C) 1991-1999, 2000, 2001, 2003, 2004, 2005, 2006 Free Software
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.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
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 General Public License for more details.
17 You should have received a copy of the GNU General Public License along
18 with this program; if not, write to the Free Software Foundation,
19 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
23 # define HAVE_MBRLEN 1
24 # define HAVE_STRUCT_ERA_ENTRY 1
25 # define HAVE_TM_GMTOFF 1
26 # define HAVE_TM_ZONE 1
27 # define HAVE_TZNAME 1
29 # define MULTIBYTE_IS_FORMAT_SAFE 1
30 # include "../locale/localeinfo.h"
36 #include <sys/types.h> /* Some systems define `time_t' here. */
38 #ifdef TIME_WITH_SYS_TIME
39 # include <sys/time.h>
42 # ifdef HAVE_SYS_TIME_H
43 # include <sys/time.h>
48 #if HAVE_TZNAME && ! defined tzname
49 extern char *tzname[];
52 /* Do multibyte processing if multibytes are supported, unless
53 multibyte sequences are safe in formats. Multibyte sequences are
54 safe if they cannot contain byte sequences that look like format
55 conversion specifications. The GNU C Library uses UTF8 multibyte
56 encoding, which is safe for formats, but strftime.c can be used
57 with other C libraries that use unsafe encodings. */
58 #define DO_MULTIBYTE (HAVE_MBLEN && HAVE_WCHAR_H && ! MULTIBYTE_IS_FORMAT_SAFE)
64 /* Simulate mbrlen with mblen as best we can. */
65 # define mbstate_t int
66 # define mbrlen(s, n, ps) mblen (s, n)
67 # define mbsinit(ps) (*(ps) == 0)
69 static const mbstate_t mbstate_zero;
80 # define CHAR_T wchar_t
81 # define UCHAR_T unsigned int
82 # define L_(Str) L##Str
83 # define NLW(Sym) _NL_W##Sym
85 # define MEMCPY(d, s, n) __wmemcpy (d, s, n)
86 # define STRLEN(s) __wcslen (s)
90 # define UCHAR_T unsigned char
94 # define MEMCPY(d, s, n) memcpy (d, s, n)
95 # define STRLEN(s) strlen (s)
98 # define MEMPCPY(d, s, n) __mempcpy (d, s, n)
100 # ifndef HAVE_MEMPCPY
101 # define MEMPCPY(d, s, n) ((void *) ((char *) memcpy (d, s, n) + (n)))
106 /* Shift A right by B bits portably, by dividing A by 2**B and
107 truncating towards minus infinity. A and B should be free of side
108 effects, and B should be in the range 0 <= B <= INT_BITS - 2, where
109 INT_BITS is the number of useful bits in an int. GNU code can
110 assume that INT_BITS is at least 32.
112 ISO C99 says that A >> B is implementation-defined if A < 0. Some
113 implementations (e.g., UNICOS 9.0 on a Cray Y-MP EL) don't shift
114 right in the usual way when A < 0, so SHR falls back on division if
115 ordinary A >> B doesn't seem to be the usual signed shift. */
119 : (a) / (1 << (b)) - ((a) % (1 << (b)) < 0))
121 /* Bound on length of the string representing an integer type or expression T.
122 Subtract 1 for the sign bit if t is signed; log10 (2.0) < 146/485;
123 add 1 for integer division truncation; add 1 more for a minus sign
125 #define INT_STRLEN_BOUND(t) \
126 ((sizeof (t) * CHAR_BIT - 1) * 146 / 485 + 2)
128 #define TM_YEAR_BASE 1900
131 /* Nonzero if YEAR is a leap year (every 4 years,
132 except every 100th isn't, and every 400th is). */
133 # define __isleap(year) \
134 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
139 # define tzname __tzname
140 # define tzset __tzset
144 /* Portable standalone applications should supply a "time_r.h" that
145 declares a POSIX-compliant localtime_r, for the benefit of older
146 implementations that lack localtime_r or have a nonstandard one.
147 See the gnulib time_r module for one way to implement this. */
150 # undef __localtime_r
151 # define __gmtime_r gmtime_r
152 # define __localtime_r localtime_r
157 # define FPRINTFTIME 0
161 # define STREAM_OR_CHAR_T FILE
162 # define STRFTIME_ARG(x) /* empty */
164 # define STREAM_OR_CHAR_T CHAR_T
165 # define STRFTIME_ARG(x) x,
169 # define memset_byte(P, Len, Byte) \
170 do { size_t _i; for (_i = 0; _i < Len; _i++) fputc (Byte, P); } while (0)
171 # define memset_space(P, Len) memset_byte (P, Len, ' ')
172 # define memset_zero(P, Len) memset_byte (P, Len, '0')
173 #elif defined COMPILE_WIDE
174 # define memset_space(P, Len) (wmemset (P, L' ', Len), (P) += (Len))
175 # define memset_zero(P, Len) (wmemset (P, L'0', Len), (P) += (Len))
177 # define memset_space(P, Len) (memset (P, ' ', Len), (P) += (Len))
178 # define memset_zero(P, Len) (memset (P, '0', Len), (P) += (Len))
185 int _delta = width - _n; \
186 int _incr = _n + (_delta > 0 ? _delta : 0); \
187 if ((size_t) _incr >= maxsize - i) \
191 if (digits == 0 && _delta > 0) \
193 if (pad == L_('0')) \
194 memset_zero (p, _delta); \
196 memset_space (p, _delta); \
199 p += FPRINTFTIME ? 0 : _n; \
205 # define add1(C) add (1, fputc (C, p))
207 # define add1(C) add (1, *p = C)
214 fwrite_lowcase (p, (s), _n); \
215 else if (to_uppcase) \
216 fwrite_uppcase (p, (s), _n); \
218 fwrite ((s), _n, 1, p))
223 memcpy_lowcase (p, (s), _n LOCALE_ARG); \
224 else if (to_uppcase) \
225 memcpy_uppcase (p, (s), _n LOCALE_ARG); \
227 MEMCPY ((void *) p, (void const *) (s), _n))
231 # ifndef USE_IN_EXTENDED_LOCALE_MODEL
232 # undef __mbsrtowcs_l
233 # define __mbsrtowcs_l(d, s, l, st, loc) __mbsrtowcs (d, s, l, st)
235 # define widen(os, ws, l) \
238 const char *__s = os; \
239 memset (&__st, '\0', sizeof (__st)); \
240 l = __mbsrtowcs_l (NULL, &__s, 0, &__st, loc); \
241 ws = (wchar_t *) alloca ((l + 1) * sizeof (wchar_t)); \
242 (void) __mbsrtowcs_l (ws, &__s, l, &__st, loc); \
247 #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL
248 /* We use this code also for the extended locale handling where the
249 function gets as an additional argument the locale which has to be
250 used. To access the values we have to redefine the _NL_CURRENT
252 # define strftime __strftime_l
253 # define wcsftime __wcsftime_l
255 # define _NL_CURRENT(category, item) \
256 (current->values[_NL_ITEM_INDEX (item)].string)
257 # define LOCALE_ARG , loc
258 # define LOCALE_PARAM_PROTO , __locale_t loc
259 # define HELPER_LOCALE_ARG , current
261 # define LOCALE_PARAM_PROTO
264 # define HELPER_LOCALE_ARG , _NL_CURRENT_DATA (LC_TIME)
266 # define HELPER_LOCALE_ARG
271 # ifdef USE_IN_EXTENDED_LOCALE_MODEL
272 # define TOUPPER(Ch, L) __towupper_l (Ch, L)
273 # define TOLOWER(Ch, L) __towlower_l (Ch, L)
275 # define TOUPPER(Ch, L) towupper (Ch)
276 # define TOLOWER(Ch, L) towlower (Ch)
279 # ifdef USE_IN_EXTENDED_LOCALE_MODEL
280 # define TOUPPER(Ch, L) __toupper_l (Ch, L)
281 # define TOLOWER(Ch, L) __tolower_l (Ch, L)
283 # define TOUPPER(Ch, L) toupper (Ch)
284 # define TOLOWER(Ch, L) tolower (Ch)
287 /* We don't use `isdigit' here since the locale dependent
288 interpretation is not what we want here. We only need to accept
289 the arabic digits in the ASCII range. One day there is perhaps a
290 more reliable way to accept other sets of digits. */
291 #define ISDIGIT(Ch) ((unsigned int) (Ch) - L_('0') <= 9)
295 fwrite_lowcase (FILE *fp, const CHAR_T *src, size_t len)
299 fputc (TOLOWER ((UCHAR_T) *src, loc), fp);
305 fwrite_uppcase (FILE *fp, const CHAR_T *src, size_t len)
309 fputc (TOUPPER ((UCHAR_T) *src, loc), fp);
315 memcpy_lowcase (CHAR_T *dest, const CHAR_T *src,
316 size_t len LOCALE_PARAM_PROTO)
319 dest[len] = TOLOWER ((UCHAR_T) src[len], loc);
324 memcpy_uppcase (CHAR_T *dest, const CHAR_T *src,
325 size_t len LOCALE_PARAM_PROTO)
328 dest[len] = TOUPPER ((UCHAR_T) src[len], loc);
335 /* Yield the difference between *A and *B,
336 measured in seconds, ignoring leap seconds. */
337 # define tm_diff ftime_tm_diff
339 tm_diff (const struct tm *a, const struct tm *b)
341 /* Compute intervening leap days correctly even if year is negative.
342 Take care to avoid int overflow in leap day calculations,
343 but it's OK to assume that A and B are close to each other. */
344 int a4 = SHR (a->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (a->tm_year & 3);
345 int b4 = SHR (b->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (b->tm_year & 3);
346 int a100 = a4 / 25 - (a4 % 25 < 0);
347 int b100 = b4 / 25 - (b4 % 25 < 0);
348 int a400 = SHR (a100, 2);
349 int b400 = SHR (b100, 2);
350 int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
351 int years = a->tm_year - b->tm_year;
352 int days = (365 * years + intervening_leap_days
353 + (a->tm_yday - b->tm_yday));
354 return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
355 + (a->tm_min - b->tm_min))
356 + (a->tm_sec - b->tm_sec));
358 #endif /* ! HAVE_TM_GMTOFF */
362 /* The number of days from the first day of the first ISO week of this
363 year to the year day YDAY with week day WDAY. ISO weeks start on
364 Monday; the first ISO week has the year's first Thursday. YDAY may
365 be as small as YDAY_MINIMUM. */
366 #define ISO_WEEK_START_WDAY 1 /* Monday */
367 #define ISO_WEEK1_WDAY 4 /* Thursday */
368 #define YDAY_MINIMUM (-366)
373 iso_week_days (int yday, int wday)
375 /* Add enough to the first operand of % to make it nonnegative. */
376 int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7;
378 - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7
379 + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY);
383 /* When compiling this file, GNU applications can #define my_strftime
384 to a symbol (typically nstrftime) to get an extended strftime with
385 extra arguments UT and NS. Emacs is a special case for now, but
386 this Emacs-specific code can be removed once Emacs's config.h
387 defines my_strftime. */
388 #if defined emacs && !defined my_strftime
389 # define my_strftime nstrftime
394 # define my_strftime fprintftime
398 # define extra_args , ut, ns
399 # define extra_args_spec , int ut, int ns
401 # if defined COMPILE_WIDE
402 # define my_strftime wcsftime
403 # define nl_get_alt_digit _nl_get_walt_digit
405 # define my_strftime strftime
406 # define nl_get_alt_digit _nl_get_alt_digit
409 # define extra_args_spec
410 /* We don't have this information in general. */
416 /* Just like my_strftime, below, but with one more parameter, UPCASE,
417 to indicate that the result should be converted to upper case. */
419 strftime_case_ (bool upcase, STREAM_OR_CHAR_T *s,
420 STRFTIME_ARG (size_t maxsize)
421 const CHAR_T *format,
422 const struct tm *tp extra_args_spec LOCALE_PARAM_PROTO)
424 #if defined _LIBC && defined USE_IN_EXTENDED_LOCALE_MODEL
425 struct locale_data *const current = loc->__locales[LC_TIME];
428 size_t maxsize = (size_t) -1;
431 int hour12 = tp->tm_hour;
433 /* We cannot make the following values variables since we must delay
434 the evaluation of these values until really needed since some
435 expressions might not be valid in every situation. The `struct tm'
436 might be generated by a strptime() call that initialized
437 only a few elements. Dereference the pointers only if the format
438 requires this. Then it is ok to fail if the pointers are invalid. */
440 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABDAY_1) + tp->tm_wday))
442 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(DAY_1) + tp->tm_wday))
444 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABMON_1) + tp->tm_mon))
446 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(MON_1) + tp->tm_mon))
448 ((const CHAR_T *) _NL_CURRENT (LC_TIME, tp->tm_hour > 11 \
449 ? NLW(PM_STR) : NLW(AM_STR)))
451 # define aw_len STRLEN (a_wkday)
452 # define am_len STRLEN (a_month)
453 # define ap_len STRLEN (ampm)
457 STREAM_OR_CHAR_T *p = s;
459 #if DO_MULTIBYTE && !defined COMPILE_WIDE
460 const char *format_end = NULL;
463 #if ! defined _LIBC && ! HAVE_RUN_TZSET_TEST
464 /* Solaris 2.5.x and 2.6 tzset sometimes modify the storage returned
465 by localtime. On such systems, we must either use the tzset and
466 localtime wrappers to work around the bug (which sets
467 HAVE_RUN_TZSET_TEST) or make a copy of the structure. */
468 struct tm copy = *tp;
474 /* The POSIX test suite assumes that setting
475 the environment variable TZ to a new value before calling strftime()
476 will influence the result (the %Z format) even if the information in
477 TP is computed with a totally different time zone.
478 This is bogus: though POSIX allows bad behavior like this,
479 POSIX does not require it. Do the right thing instead. */
480 zone = (const char *) tp->tm_zone;
485 if (! (zone && *zone))
490 /* POSIX.1 requires that local time zone information be used as
491 though strftime called tzset. */
504 for (f = format; *f != '\0'; ++f)
506 int pad = 0; /* Padding for number ('-', '_', or 0). */
507 int modifier; /* Field modifier ('E', 'O', or 0). */
508 int digits = 0; /* Max digits for numeric format. */
509 int number_value; /* Numeric value to be printed. */
510 unsigned int u_number_value; /* (unsigned int) number_value. */
511 bool negative_number; /* The number is negative. */
512 bool always_output_a_sign; /* +/- should always be output. */
513 int tz_colon_mask; /* Bitmask of where ':' should appear. */
514 const CHAR_T *subfmt;
518 + 2 /* for the two colons in a %::z or %:::z time zone */
519 + (sizeof (int) < sizeof (time_t)
520 ? INT_STRLEN_BOUND (time_t)
521 : INT_STRLEN_BOUND (int))];
523 bool to_lowcase = false;
524 bool to_uppcase = upcase;
526 bool change_case = false;
529 #if DO_MULTIBYTE && !defined COMPILE_WIDE
535 case L_('\b'): case L_('\t'): case L_('\n'):
536 case L_('\v'): case L_('\f'): case L_('\r'):
537 case L_(' '): case L_('!'): case L_('"'): case L_('#'): case L_('&'):
538 case L_('\''): case L_('('): case L_(')'): case L_('*'): case L_('+'):
539 case L_(','): case L_('-'): case L_('.'): case L_('/'): case L_('0'):
540 case L_('1'): case L_('2'): case L_('3'): case L_('4'): case L_('5'):
541 case L_('6'): case L_('7'): case L_('8'): case L_('9'): case L_(':'):
542 case L_(';'): case L_('<'): case L_('='): case L_('>'): case L_('?'):
543 case L_('A'): case L_('B'): case L_('C'): case L_('D'): case L_('E'):
544 case L_('F'): case L_('G'): case L_('H'): case L_('I'): case L_('J'):
545 case L_('K'): case L_('L'): case L_('M'): case L_('N'): case L_('O'):
546 case L_('P'): case L_('Q'): case L_('R'): case L_('S'): case L_('T'):
547 case L_('U'): case L_('V'): case L_('W'): case L_('X'): case L_('Y'):
548 case L_('Z'): case L_('['): case L_('\\'): case L_(']'): case L_('^'):
549 case L_('_'): case L_('a'): case L_('b'): case L_('c'): case L_('d'):
550 case L_('e'): case L_('f'): case L_('g'): case L_('h'): case L_('i'):
551 case L_('j'): case L_('k'): case L_('l'): case L_('m'): case L_('n'):
552 case L_('o'): case L_('p'): case L_('q'): case L_('r'): case L_('s'):
553 case L_('t'): case L_('u'): case L_('v'): case L_('w'): case L_('x'):
554 case L_('y'): case L_('z'): case L_('{'): case L_('|'): case L_('}'):
556 /* The C Standard requires these 98 characters (plus '%') to
557 be in the basic execution character set. None of these
558 characters can start a multibyte sequence, so they need
559 not be analyzed further. */
564 /* Copy this multibyte sequence until we reach its end, find
565 an error, or come back to the initial shift state. */
567 mbstate_t mbstate = mbstate_zero;
572 format_end = f + strlen (f) + 1;
573 fsize = format_end - f;
577 size_t bytes = mbrlen (f + len, fsize - len, &mbstate);
582 if (bytes == (size_t) -2)
584 len += strlen (f + len);
588 if (bytes == (size_t) -1)
596 while (! mbsinit (&mbstate));
604 #else /* ! DO_MULTIBYTE */
606 /* Either multibyte encodings are not supported, they are
607 safe for formats, so any non-'%' byte can be copied through,
608 or this is the wide character version. */
615 #endif /* ! DO_MULTIBYTE */
617 /* Check for flags that can modify a format. */
622 /* This influences the number formats. */
629 /* This changes textual output. */
643 /* As a GNU extension we allow to specify the field width. */
649 if (width > INT_MAX / 10
650 || (width == INT_MAX / 10 && *f - L_('0') > INT_MAX % 10))
651 /* Avoid overflow. */
656 width += *f - L_('0');
660 while (ISDIGIT (*f));
663 /* Check for modifiers. */
676 /* Now do the specified format. */
680 #define DO_NUMBER(d, v) \
682 number_value = v; goto do_number
683 #define DO_SIGNED_NUMBER(d, negative, v) \
685 negative_number = negative; \
686 u_number_value = v; goto do_signed_number
688 /* The mask is not what you might think.
689 When the ordinal i'th bit is set, insert a colon
690 before the i'th digit of the time zone representation. */
691 #define DO_TZ_OFFSET(d, negative, mask, v) \
693 negative_number = negative; \
694 tz_colon_mask = mask; \
695 u_number_value = v; goto do_tz_offset
696 #define DO_NUMBER_SPACEPAD(d, v) \
698 number_value = v; goto do_number_spacepad
715 cpy (aw_len, a_wkday);
718 goto underlying_strftime;
730 cpy (STRLEN (f_wkday), f_wkday);
733 goto underlying_strftime;
746 cpy (am_len, a_month);
749 goto underlying_strftime;
761 cpy (STRLEN (f_month), f_month);
764 goto underlying_strftime;
768 if (modifier == L_('O'))
771 if (! (modifier == 'E'
773 (const CHAR_T *) _NL_CURRENT (LC_TIME,
776 subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_T_FMT));
778 goto underlying_strftime;
783 size_t len = strftime_case_ (to_uppcase,
784 NULL, STRFTIME_ARG ((size_t) -1)
786 tp extra_args LOCALE_ARG);
787 add (len, strftime_case_ (to_uppcase, p,
788 STRFTIME_ARG (maxsize - i)
790 tp extra_args LOCALE_ARG));
794 #if !(defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY)
797 /* The relevant information is available only via the
798 underlying strftime implementation, so use that. */
801 char ubuf[1024]; /* enough for any single format in practice */
803 /* Make sure we're calling the actual underlying strftime.
804 In some cases, config.h contains something like
805 "#define strftime rpl_strftime". */
811 /* The space helps distinguish strftime failure from empty
819 len = strftime (ubuf, sizeof ubuf, ufmt, tp);
821 cpy (len - 1, ubuf + 1);
827 if (modifier == L_('O'))
829 if (modifier == L_('E'))
831 #if HAVE_STRUCT_ERA_ENTRY
832 struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG);
836 size_t len = __wcslen (era->era_wname);
837 cpy (len, era->era_wname);
839 size_t len = strlen (era->era_name);
840 cpy (len, era->era_name);
845 goto underlying_strftime;
850 int century = tp->tm_year / 100 + TM_YEAR_BASE / 100;
851 century -= tp->tm_year % 100 < 0 && 0 < century;
852 DO_SIGNED_NUMBER (2, tp->tm_year < - TM_YEAR_BASE, century);
856 if (modifier == L_('O'))
859 if (! (modifier == L_('E')
861 (const CHAR_T *)_NL_CURRENT (LC_TIME, NLW(ERA_D_FMT)))
863 subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_FMT));
866 goto underlying_strftime;
871 subfmt = L_("%m/%d/%y");
875 if (modifier == L_('E'))
878 DO_NUMBER (2, tp->tm_mday);
881 if (modifier == L_('E'))
884 DO_NUMBER_SPACEPAD (2, tp->tm_mday);
886 /* All numeric formats set DIGITS and NUMBER_VALUE (or U_NUMBER_VALUE)
887 and then jump to one of these labels. */
890 always_output_a_sign = true;
894 /* Force `_' flag unless overridden by `0' or `-' flag. */
895 if (pad != L_('0') && pad != L_('-'))
899 /* Format NUMBER_VALUE according to the MODIFIER flag. */
900 negative_number = number_value < 0;
901 u_number_value = number_value;
904 always_output_a_sign = false;
908 /* Format U_NUMBER_VALUE according to the MODIFIER flag.
909 NEGATIVE_NUMBER is nonzero if the original number was
910 negative; in this case it was converted directly to
911 unsigned int (i.e., modulo (UINT_MAX + 1)) without
913 if (modifier == L_('O') && !negative_number)
916 /* Get the locale specific alternate representation of
917 the number. If none exist NULL is returned. */
918 const CHAR_T *cp = nl_get_alt_digit (u_number_value
923 size_t digitlen = STRLEN (cp);
931 goto underlying_strftime;
935 bufp = buf + sizeof (buf) / sizeof (buf[0]);
938 u_number_value = - u_number_value;
942 if (tz_colon_mask & 1)
945 *--bufp = u_number_value % 10 + L_('0');
946 u_number_value /= 10;
948 while (u_number_value != 0 || tz_colon_mask != 0);
950 do_number_sign_and_padding:
954 sign_char = (negative_number ? L_('-')
955 : always_output_a_sign ? L_('+')
965 int padding = digits - (buf + (sizeof (buf) / sizeof (buf[0]))
966 - bufp) - !!sign_char;
972 if ((size_t) padding >= maxsize - i)
976 memset_space (p, padding);
978 width = width > padding ? width - padding : 0;
984 if ((size_t) digits >= maxsize - i)
991 memset_zero (p, padding);
1003 cpy (buf + sizeof (buf) / sizeof (buf[0]) - bufp, bufp);
1009 subfmt = L_("%Y-%m-%d");
1013 if (modifier == L_('E'))
1016 DO_NUMBER (2, tp->tm_hour);
1019 if (modifier == L_('E'))
1022 DO_NUMBER (2, hour12);
1024 case L_('k'): /* GNU extension. */
1025 if (modifier == L_('E'))
1028 DO_NUMBER_SPACEPAD (2, tp->tm_hour);
1030 case L_('l'): /* GNU extension. */
1031 if (modifier == L_('E'))
1034 DO_NUMBER_SPACEPAD (2, hour12);
1037 if (modifier == L_('E'))
1040 DO_SIGNED_NUMBER (3, tp->tm_yday < -1, tp->tm_yday + 1U);
1043 if (modifier == L_('E'))
1046 DO_NUMBER (2, tp->tm_min);
1049 if (modifier == L_('E'))
1052 DO_SIGNED_NUMBER (2, tp->tm_mon < -1, tp->tm_mon + 1U);
1055 case L_('N'): /* GNU extension. */
1056 if (modifier == L_('E'))
1064 /* Take an explicit width less than 9 as a precision. */
1066 for (j = width; j < 9; j++)
1070 DO_NUMBER (width, number_value);
1080 format_char = L_('p');
1094 goto underlying_strftime;
1098 subfmt = L_("%H:%M");
1103 if (*(subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME,
1106 subfmt = L_("%I:%M:%S %p");
1109 goto underlying_strftime;
1113 if (modifier == L_('E'))
1116 DO_NUMBER (2, tp->tm_sec);
1118 case L_('s'): /* GNU extension. */
1126 /* Generate string value for T using time_t arithmetic;
1127 this works even if sizeof (long) < sizeof (time_t). */
1129 bufp = buf + sizeof (buf) / sizeof (buf[0]);
1130 negative_number = t < 0;
1136 *--bufp = (negative_number ? -d : d) + L_('0');
1141 always_output_a_sign = false;
1142 goto do_number_sign_and_padding;
1146 if (modifier == L_('O'))
1149 if (! (modifier == L_('E')
1151 (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ERA_T_FMT)))
1153 subfmt = (const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(T_FMT));
1156 goto underlying_strftime;
1159 subfmt = L_("%H:%M:%S");
1167 DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1);
1170 if (modifier == L_('E'))
1173 DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7);
1178 if (modifier == L_('E'))
1181 /* YEAR is a leap year if and only if (tp->tm_year + TM_YEAR_BASE)
1182 is a leap year, except that YEAR and YEAR - 1 both work
1183 correctly even when (tp->tm_year + TM_YEAR_BASE) would
1185 int year = (tp->tm_year
1187 ? TM_YEAR_BASE % 400
1188 : TM_YEAR_BASE % 400 - 400));
1189 int year_adjust = 0;
1190 int days = iso_week_days (tp->tm_yday, tp->tm_wday);
1194 /* This ISO week belongs to the previous year. */
1196 days = iso_week_days (tp->tm_yday + (365 + __isleap (year - 1)),
1201 int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)),
1205 /* This ISO week belongs to the next year. */
1215 int yy = (tp->tm_year % 100 + year_adjust) % 100;
1216 DO_NUMBER (2, (0 <= yy
1218 : tp->tm_year < -TM_YEAR_BASE - year_adjust
1224 DO_SIGNED_NUMBER (4, tp->tm_year < -TM_YEAR_BASE - year_adjust,
1225 (tp->tm_year + (unsigned int) TM_YEAR_BASE
1229 DO_NUMBER (2, days / 7 + 1);
1234 if (modifier == L_('E'))
1237 DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7);
1240 if (modifier == L_('E'))
1243 DO_NUMBER (1, tp->tm_wday);
1246 if (modifier == 'E')
1248 #if HAVE_STRUCT_ERA_ENTRY
1249 struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG);
1252 # ifdef COMPILE_WIDE
1253 subfmt = era->era_wformat;
1255 subfmt = era->era_format;
1260 goto underlying_strftime;
1263 if (modifier == L_('O'))
1266 DO_SIGNED_NUMBER (4, tp->tm_year < -TM_YEAR_BASE,
1267 tp->tm_year + (unsigned int) TM_YEAR_BASE);
1270 if (modifier == L_('E'))
1272 #if HAVE_STRUCT_ERA_ENTRY
1273 struct era_entry *era = _nl_get_era_entry (tp HELPER_LOCALE_ARG);
1276 int delta = tp->tm_year - era->start_date[0];
1277 DO_NUMBER (1, (era->offset
1278 + delta * era->absolute_direction));
1281 goto underlying_strftime;
1286 int yy = tp->tm_year % 100;
1288 yy = tp->tm_year < - TM_YEAR_BASE ? -yy : yy + 100;
1300 /* The tzset() call might have changed the value. */
1301 if (!(zone && *zone) && tp->tm_isdst >= 0)
1302 zone = tzname[tp->tm_isdst != 0];
1309 /* The zone string is always given in multibyte form. We have
1310 to transform it first. */
1313 widen (zone, wczone, len);
1317 cpy (strlen (zone), zone);
1322 /* :, ::, and ::: are valid only just before 'z'.
1323 :::: etc. are rejected later. */
1324 for (colons = 1; f[colons] == L_(':'); colons++)
1326 if (f[colons] != L_('z'))
1329 goto do_z_conversion;
1335 if (tp->tm_isdst < 0)
1344 diff = tp->tm_gmtoff;
1357 if (lt == (time_t) -1)
1359 /* mktime returns -1 for errors, but -1 is also a
1360 valid time_t value. Check whether an error really
1364 if (! __localtime_r (<, &tm)
1365 || ((ltm.tm_sec ^ tm.tm_sec)
1366 | (ltm.tm_min ^ tm.tm_min)
1367 | (ltm.tm_hour ^ tm.tm_hour)
1368 | (ltm.tm_mday ^ tm.tm_mday)
1369 | (ltm.tm_mon ^ tm.tm_mon)
1370 | (ltm.tm_year ^ tm.tm_year)))
1374 if (! __gmtime_r (<, >m))
1377 diff = tm_diff (<m, >m);
1381 hour_diff = diff / 60 / 60;
1382 min_diff = diff / 60 % 60;
1383 sec_diff = diff % 60;
1388 DO_TZ_OFFSET (5, diff < 0, 0, hour_diff * 100 + min_diff);
1390 case 1: tz_hh_mm: /* +hh:mm */
1391 DO_TZ_OFFSET (6, diff < 0, 04, hour_diff * 100 + min_diff);
1393 case 2: tz_hh_mm_ss: /* +hh:mm:ss */
1394 DO_TZ_OFFSET (9, diff < 0, 024,
1395 hour_diff * 10000 + min_diff * 100 + sec_diff);
1397 case 3: /* +hh if possible, else +hh:mm, else +hh:mm:ss */
1402 DO_TZ_OFFSET (3, diff < 0, 0, hour_diff);
1409 case L_('\0'): /* GNU extension: % at end of format. */
1413 /* Unknown format; output the format, including the '%',
1414 since this is most likely the right thing to do if a
1415 multibyte string has been misparsed. */
1419 for (flen = 1; f[1 - flen] != L_('%'); flen++)
1421 cpy (flen, &f[1 - flen]);
1428 if (p && maxsize != 0)
1435 /* Write information from TP into S according to the format
1436 string FORMAT, writing no more that MAXSIZE characters
1437 (including the terminating '\0') and returning number of
1438 characters written. If S is NULL, nothing will be written
1439 anywhere, so to determine how many characters would be
1440 written, use NULL for S and (size_t) -1 for MAXSIZE. */
1442 my_strftime (STREAM_OR_CHAR_T *s, STRFTIME_ARG (size_t maxsize)
1443 const CHAR_T *format,
1444 const struct tm *tp extra_args_spec LOCALE_PARAM_PROTO)
1446 return strftime_case_ (false, s, STRFTIME_ARG (maxsize)
1447 format, tp extra_args LOCALE_ARG);
1450 #if defined _LIBC && ! FPRINTFTIME
1451 libc_hidden_def (my_strftime)
1455 #if defined emacs && ! FPRINTFTIME
1456 /* For Emacs we have a separate interface which corresponds to the normal
1457 strftime function plus the ut argument, but without the ns argument. */
1459 emacs_strftimeu (char *s, size_t maxsize, const char *format,
1460 const struct tm *tp, int ut)
1462 return my_strftime (s, maxsize, format, tp, ut, 0);