1 /* Copyright (C) 1991-1999, 2000 Free Software Foundation, Inc.
3 NOTE: The canonical source of this file is maintained with the GNU C Library.
4 Bugs can be reported to bug-glibc@prep.ai.mit.edu.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
26 # define HAVE_LIMITS_H 1
28 # define HAVE_MBRLEN 1
29 # define HAVE_STRUCT_ERA_ENTRY 1
30 # define HAVE_TM_GMTOFF 1
31 # define HAVE_TM_ZONE 1
32 # define HAVE_TZNAME 1
34 # define MULTIBYTE_IS_FORMAT_SAFE 1
35 # define STDC_HEADERS 1
36 # include "../locale/localeinfo.h"
39 #if defined emacs && !defined HAVE_BCOPY
40 # define HAVE_MEMCPY 1
44 #include <sys/types.h> /* Some systems define `time_t' here. */
46 #ifdef TIME_WITH_SYS_TIME
47 # include <sys/time.h>
50 # ifdef HAVE_SYS_TIME_H
51 # include <sys/time.h>
57 extern char *tzname[];
60 /* Do multibyte processing if multibytes are supported, unless
61 multibyte sequences are safe in formats. Multibyte sequences are
62 safe if they cannot contain byte sequences that look like format
63 conversion specifications. The GNU C Library uses UTF8 multibyte
64 encoding, which is safe for formats, but strftime.c can be used
65 with other C libraries that use unsafe encodings. */
66 #define DO_MULTIBYTE (HAVE_MBLEN && ! MULTIBYTE_IS_FORMAT_SAFE)
72 /* Simulate mbrlen with mblen as best we can. */
73 # define mbstate_t int
74 # define mbrlen(s, n, ps) mblen (s, n)
75 # define mbsinit(ps) (*(ps) == 0)
77 static const mbstate_t mbstate_zero;
90 # define memcpy(d, s, n) bcopy ((s), (d), (n))
96 # define CHAR_T wchar_t
97 # define UCHAR_T unsigned int
98 # define L_(Str) L##Str
99 # define NLW(Sym) _NL_W##Sym
101 # define MEMCPY(d, s, n) wmemcpy (d, s, n)
102 # define STRLEN(s) wcslen (s)
106 # define UCHAR_T unsigned char
108 # define NLW(Sym) Sym
110 # if !defined STDC_HEADERS && !defined HAVE_MEMCPY
111 # define MEMCPY(d, s, n) bcopy ((s), (d), (n))
113 # define MEMCPY(d, s, n) memcpy ((d), (s), (n))
115 # define STRLEN(s) strlen (s)
118 # define MEMPCPY(d, s, n) __mempcpy (d, s, n)
120 # ifndef HAVE_MEMPCPY
121 # define MEMPCPY(d, s, n) ((void *) ((char *) memcpy (d, s, n) + (n)))
127 # if defined __GNUC__ || (defined __STDC__ && __STDC__)
128 # define __P(args) args
130 # define __P(args) ()
132 #endif /* Not __P. */
150 #define TYPE_SIGNED(t) ((t) -1 < 0)
152 /* Bound on length of the string representing an integer value of type t.
153 Subtract one for the sign bit if t is signed;
154 302 / 1000 is log10 (2) rounded up;
155 add one for integer division truncation;
156 add one more for a minus sign if t is signed. */
157 #define INT_STRLEN_BOUND(t) \
158 ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 + 1 + TYPE_SIGNED (t))
160 #define TM_YEAR_BASE 1900
163 /* Nonzero if YEAR is a leap year (every 4 years,
164 except every 100th isn't, and every 400th is). */
165 # define __isleap(year) \
166 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
171 # define my_strftime_gmtime_r __gmtime_r
172 # define my_strftime_localtime_r __localtime_r
173 # define tzname __tzname
174 # define tzset __tzset
177 /* If we're a strftime substitute in a GNU program, then prefer gmtime
178 to gmtime_r, since many gmtime_r implementations are buggy.
179 Similarly for localtime_r. */
181 # if ! HAVE_TM_GMTOFF
182 static struct tm *my_strftime_gmtime_r __P ((const time_t *, struct tm *));
184 my_strftime_gmtime_r (t, tp)
188 struct tm *l = gmtime (t);
194 # endif /* ! HAVE_TM_GMTOFF */
196 static struct tm *my_strftime_localtime_r __P ((const time_t *, struct tm *));
198 my_strftime_localtime_r (t, tp)
202 struct tm *l = localtime (t);
208 #endif /* ! defined _LIBC */
211 #if !defined memset && !defined HAVE_MEMSET && !defined _LIBC
212 /* Some systems lack the `memset' function and we don't want to
213 introduce additional dependencies. */
214 /* The SGI compiler reportedly barfs on the trailing null
215 if we use a string constant as the initializer. 28 June 1997, rms. */
216 static const CHAR_T spaces[16] = /* " " */
218 L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),
219 L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' '),L_(' ')
221 static const CHAR_T zeroes[16] = /* "0000000000000000" */
223 L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),
224 L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0'),L_('0')
227 # define memset_space(P, Len) \
233 int _this = _len > 16 ? 16 : _len; \
234 (P) = MEMPCPY ((P), spaces, _this * sizeof (CHAR_T)); \
240 # define memset_zero(P, Len) \
246 int _this = _len > 16 ? 16 : _len; \
247 (P) = MEMPCPY ((P), zeroes, _this * sizeof (CHAR_T)); \
254 # define memset_space(P, Len) (wmemset ((P), L' ', (Len)), (P) += (Len))
255 # define memset_zero(P, Len) (wmemset ((P), L'0', (Len)), (P) += (Len))
257 # define memset_space(P, Len) (memset ((P), ' ', (Len)), (P) += (Len))
258 # define memset_zero(P, Len) (memset ((P), '0', (Len)), (P) += (Len))
266 int _delta = width - _n; \
267 int _incr = _n + (_delta > 0 ? _delta : 0); \
268 if (i + _incr >= maxsize) \
274 if (pad == L_('0')) \
275 memset_zero (p, _delta); \
277 memset_space (p, _delta); \
288 memcpy_lowcase (p, (s), _n); \
289 else if (to_uppcase) \
290 memcpy_uppcase (p, (s), _n); \
292 MEMCPY ((PTR) p, (PTR) (s), _n))
295 # define widen(os, ws, l) \
298 const char *__s = os; \
299 memset (&__st, '\0', sizeof (__st)); \
300 l = __mbsrtowcs (NULL, &__s, 0, &__st); \
301 ws = alloca ((l + 1) * sizeof (wchar_t)); \
302 (void) __mbsrtowcs (ws, &__s, l, &__st); \
308 # define TOUPPER(Ch) towupper (Ch)
309 # define TOLOWER(Ch) towlower (Ch)
312 # define TOUPPER(Ch) toupper (Ch)
313 # define TOLOWER(Ch) tolower (Ch)
315 # define TOUPPER(Ch) (islower (Ch) ? toupper (Ch) : (Ch))
316 # define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch))
319 /* We don't use `isdigit' here since the locale dependent
320 interpretation is not what we want here. We only need to accept
321 the arabic digits in the ASCII range. One day there is perhaps a
322 more reliable way to accept other sets of digits. */
323 #define ISDIGIT(Ch) ((unsigned int) (Ch) - L_('0') <= 9)
325 static CHAR_T *memcpy_lowcase __P ((CHAR_T *dest, const CHAR_T *src,
329 memcpy_lowcase (dest, src, len)
335 dest[len] = TOLOWER ((UCHAR_T) src[len]);
339 static CHAR_T *memcpy_uppcase __P ((CHAR_T *dest, const CHAR_T *src,
343 memcpy_uppcase (dest, src, len)
349 dest[len] = TOUPPER ((UCHAR_T) src[len]);
355 /* Yield the difference between *A and *B,
356 measured in seconds, ignoring leap seconds. */
357 # define tm_diff ftime_tm_diff
358 static int tm_diff __P ((const struct tm *, const struct tm *));
364 /* Compute intervening leap days correctly even if year is negative.
365 Take care to avoid int overflow in leap day calculations,
366 but it's OK to assume that A and B are close to each other. */
367 int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3);
368 int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3);
369 int a100 = a4 / 25 - (a4 % 25 < 0);
370 int b100 = b4 / 25 - (b4 % 25 < 0);
371 int a400 = a100 >> 2;
372 int b400 = b100 >> 2;
373 int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
374 int years = a->tm_year - b->tm_year;
375 int days = (365 * years + intervening_leap_days
376 + (a->tm_yday - b->tm_yday));
377 return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
378 + (a->tm_min - b->tm_min))
379 + (a->tm_sec - b->tm_sec));
381 #endif /* ! HAVE_TM_GMTOFF */
385 /* The number of days from the first day of the first ISO week of this
386 year to the year day YDAY with week day WDAY. ISO weeks start on
387 Monday; the first ISO week has the year's first Thursday. YDAY may
388 be as small as YDAY_MINIMUM. */
389 #define ISO_WEEK_START_WDAY 1 /* Monday */
390 #define ISO_WEEK1_WDAY 4 /* Thursday */
391 #define YDAY_MINIMUM (-366)
392 static int iso_week_days __P ((int, int));
397 iso_week_days (yday, wday)
401 /* Add enough to the first operand of % to make it nonnegative. */
402 int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7;
404 - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7
405 + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY);
409 #if !(defined _NL_CURRENT || HAVE_STRFTIME)
410 static CHAR_T const weekday_name[][10] =
412 L_("Sunday"), L_("Monday"), L_("Tuesday"), L_("Wednesday"),
413 L_("Thursday"), L_("Friday"), L_("Saturday")
415 static CHAR_T const month_name[][10] =
417 L_("January"), L_("February"), L_("March"), L_("April"), L_("May"),
418 L_("June"), L_("July"), L_("August"), L_("September"), L_("October"),
419 L_("November"), L_("December")
425 # define my_strftime emacs_strftimeu
426 # define ut_argument , ut
427 # define ut_argument_spec int ut;
428 # define ut_argument_spec_iso , int ut
431 # define my_strftime wcsftime
433 # define my_strftime strftime
436 # define ut_argument_spec
437 # define ut_argument_spec_iso
438 /* We don't have this information in general. */
442 #if !defined _LIBC && HAVE_TZNAME && HAVE_TZSET
443 /* Solaris 2.5 tzset sometimes modifies the storage returned by localtime.
444 Work around this bug by copying *tp before it might be munged. */
445 size_t _strftime_copytm __P ((char *, size_t, const char *,
446 const struct tm * ut_argument_spec_iso));
448 my_strftime (s, maxsize, format, tp ut_argument)
451 const CHAR_T *format;
457 return _strftime_copytm (s, maxsize, format, &tmcopy ut_argument);
460 # define my_strftime(S, Maxsize, Format, Tp) \
461 _strftime_copytm (S, Maxsize, Format, Tp)
465 /* Write information from TP into S according to the format
466 string FORMAT, writing no more that MAXSIZE characters
467 (including the terminating '\0') and returning number of
468 characters written. If S is NULL, nothing will be written
469 anywhere, so to determine how many characters would be
470 written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */
472 my_strftime (s, maxsize, format, tp ut_argument)
475 const CHAR_T *format;
479 int hour12 = tp->tm_hour;
481 /* We cannot make the following values variables since we must delay
482 the evaluation of these values until really needed since some
483 expressions might not be valid in every situation. The `struct tm'
484 might be generated by a strptime() call that initialized
485 only a few elements. Dereference the pointers only if the format
486 requires this. Then it is ok to fail if the pointers are invalid. */
488 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABDAY_1) + tp->tm_wday))
490 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(DAY_1) + tp->tm_wday))
492 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABMON_1) + tp->tm_mon))
494 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(MON_1) + tp->tm_mon))
496 ((const CHAR_T *) _NL_CURRENT (LC_TIME, tp->tm_hour > 11 \
497 ? NLW(PM_STR) : NLW(AM_STR)))
499 # define aw_len STRLEN (a_wkday)
500 # define am_len STRLEN (a_month)
501 # define ap_len STRLEN (ampm)
504 # define f_wkday (weekday_name[tp->tm_wday])
505 # define f_month (month_name[tp->tm_mon])
506 # define a_wkday f_wkday
507 # define a_month f_month
508 # define ampm (L_("AMPM") + 2 * (tp->tm_hour > 11))
522 /* The POSIX test suite assumes that setting
523 the environment variable TZ to a new value before calling strftime()
524 will influence the result (the %Z format) even if the information in
525 TP is computed with a totally different time zone.
526 This is bogus: though POSIX allows bad behavior like this,
527 POSIX does not require it. Do the right thing instead. */
528 zone = (const char *) tp->tm_zone;
533 if (! (zone && *zone))
538 /* POSIX.1 8.1.1 requires that whenever strftime() is called, the
539 time zone names contained in the external variable `tzname' shall
540 be set as if the tzset() function had been called. */
553 for (f = format; *f != '\0'; ++f)
555 int pad = 0; /* Padding for number ('-', '_', or 0). */
556 int modifier; /* Field modifier ('E', 'O', or 0). */
557 int digits; /* Max digits for numeric format. */
558 int number_value; /* Numeric value to be printed. */
559 int negative_number; /* 1 if the number is negative. */
560 const CHAR_T *subfmt;
562 CHAR_T buf[1 + (sizeof (int) < sizeof (time_t)
563 ? INT_STRLEN_BOUND (time_t)
564 : INT_STRLEN_BOUND (int))];
571 #if DO_MULTIBYTE && !defined COMPILE_WIDE
577 case L_('\b'): case L_('\t'): case L_('\n'):
578 case L_('\v'): case L_('\f'): case L_('\r'):
579 case L_(' '): case L_('!'): case L_('"'): case L_('#'): case L_('&'):
580 case L_('\''): case L_('('): case L_(')'): case L_('*'): case L_('+'):
581 case L_(','): case L_('-'): case L_('.'): case L_('/'): case L_('0'):
582 case L_('1'): case L_('2'): case L_('3'): case L_('4'): case L_('5'):
583 case L_('6'): case L_('7'): case L_('8'): case L_('9'): case L_(':'):
584 case L_(';'): case L_('<'): case L_('='): case L_('>'): case L_('?'):
585 case L_('A'): case L_('B'): case L_('C'): case L_('D'): case L_('E'):
586 case L_('F'): case L_('G'): case L_('H'): case L_('I'): case L_('J'):
587 case L_('K'): case L_('L'): case L_('M'): case L_('N'): case L_('O'):
588 case L_('P'): case L_('Q'): case L_('R'): case L_('S'): case L_('T'):
589 case L_('U'): case L_('V'): case L_('W'): case L_('X'): case L_('Y'):
590 case L_('Z'): case L_('['): case L_('\\'): case L_(']'): case L_('^'):
591 case L_('_'): case L_('a'): case L_('b'): case L_('c'): case L_('d'):
592 case L_('e'): case L_('f'): case L_('g'): case L_('h'): case L_('i'):
593 case L_('j'): case L_('k'): case L_('l'): case L_('m'): case L_('n'):
594 case L_('o'): case L_('p'): case L_('q'): case L_('r'): case L_('s'):
595 case L_('t'): case L_('u'): case L_('v'): case L_('w'): case L_('x'):
596 case L_('y'): case L_('z'): case L_('{'): case L_('|'): case L_('}'):
598 /* The C Standard requires these 98 characters (plus '%') to
599 be in the basic execution character set. None of these
600 characters can start a multibyte sequence, so they need
601 not be analyzed further. */
606 /* Copy this multibyte sequence until we reach its end, find
607 an error, or come back to the initial shift state. */
609 mbstate_t mbstate = mbstate_zero;
614 size_t bytes = mbrlen (f + len, (size_t) -1, &mbstate);
619 if (bytes == (size_t) -2)
621 len += strlen (f + len);
625 if (bytes == (size_t) -1)
633 while (! mbsinit (&mbstate));
641 #else /* ! DO_MULTIBYTE */
643 /* Either multibyte encodings are not supported, they are
644 safe for formats, so any non-'%' byte can be copied through,
645 or this is the wide character version. */
652 #endif /* ! DO_MULTIBYTE */
654 /* Check for flags that can modify a format. */
659 /* This influences the number formats. */
666 /* This changes textual output. */
680 /* As a GNU extension we allow to specify the field width. */
687 width += *f - L_('0');
690 while (ISDIGIT (*f));
693 /* Check for modifiers. */
706 /* Now do the specified format. */
710 #define DO_NUMBER(d, v) \
711 digits = width == -1 ? d : width; \
712 number_value = v; goto do_number
713 #define DO_NUMBER_SPACEPAD(d, v) \
714 digits = width == -1 ? d : width; \
715 number_value = v; goto do_number_spacepad
731 #if defined _NL_CURRENT || !HAVE_STRFTIME
732 cpy (aw_len, a_wkday);
735 goto underlying_strftime;
746 #if defined _NL_CURRENT || !HAVE_STRFTIME
747 cpy (STRLEN (f_wkday), f_wkday);
750 goto underlying_strftime;
754 case L_('h'): /* POSIX.2 extension. */
757 #if defined _NL_CURRENT || !HAVE_STRFTIME
758 cpy (am_len, a_month);
761 goto underlying_strftime;
772 #if defined _NL_CURRENT || !HAVE_STRFTIME
773 cpy (STRLEN (f_month), f_month);
776 goto underlying_strftime;
780 if (modifier == L_('O'))
783 if (! (modifier == 'E'
784 && (*(subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME,
787 subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_T_FMT));
790 goto underlying_strftime;
792 subfmt = L_("%a %b %e %H:%M:%S %Y");
798 CHAR_T *old_start = p;
799 size_t len = my_strftime (NULL, (size_t) -1, subfmt, tp);
800 add (len, my_strftime (p, maxsize - i, subfmt, tp));
803 while (old_start < p)
805 *old_start = TOUPPER ((UCHAR_T) *old_start);
811 #if HAVE_STRFTIME && ! (defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY)
814 /* The relevant information is available only via the
815 underlying strftime implementation, so use that. */
818 char ubuf[1024]; /* enough for any single format in practice */
820 /* Make sure we're calling the actual underlying strftime.
821 In some cases, config.h contains something like
822 "#define strftime rpl_strftime". */
833 len = strftime (ubuf, sizeof ubuf, ufmt, tp);
834 if (len == 0 && ubuf[0] != '\0')
841 case L_('C'): /* POSIX.2 extension. */
842 if (modifier == L_('O'))
844 if (modifier == L_('E'))
846 #if HAVE_STRUCT_ERA_ENTRY
847 struct era_entry *era = _nl_get_era_entry (tp);
851 size_t len = wcslen (era->era_wname);
852 cpy (len, era->era_wname);
854 size_t len = strlen (era->era_name);
855 cpy (len, era->era_name);
861 goto underlying_strftime;
867 int year = tp->tm_year + TM_YEAR_BASE;
868 DO_NUMBER (1, year / 100 - (year % 100 < 0));
872 if (modifier == L_('O'))
875 if (! (modifier == L_('E')
876 && (*(subfmt = (CHAR_T *)_NL_CURRENT (LC_TIME,
879 subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_FMT));
883 goto underlying_strftime;
888 case L_('D'): /* POSIX.2 extension. */
891 subfmt = L_("%m/%d/%y");
895 if (modifier == L_('E'))
898 DO_NUMBER (2, tp->tm_mday);
900 case L_('e'): /* POSIX.2 extension. */
901 if (modifier == L_('E'))
904 DO_NUMBER_SPACEPAD (2, tp->tm_mday);
906 /* All numeric formats set DIGITS and NUMBER_VALUE and then
907 jump to one of these two labels. */
910 /* Force `_' flag unless overwritten by `0' flag. */
915 /* Format the number according to the MODIFIER flag. */
917 if (modifier == L_('O') && 0 <= number_value)
920 /* Get the locale specific alternate representation of
921 the number NUMBER_VALUE. If none exist NULL is returned. */
923 const wchar_t *cp = _nl_get_walt_digit (number_value);
925 const char *cp = _nl_get_alt_digit (number_value);
930 size_t digitlen = STRLEN (cp);
939 goto underlying_strftime;
944 unsigned int u = number_value;
946 bufp = buf + sizeof (buf) / sizeof (buf[0]);
947 negative_number = number_value < 0;
953 *--bufp = u % 10 + L_('0');
954 while ((u /= 10) != 0);
957 do_number_sign_and_padding:
963 int padding = digits - (buf + (sizeof (buf) / sizeof (buf[0]))
968 while (0 < padding--)
973 bufp += negative_number;
974 while (0 < padding--)
981 cpy (buf + sizeof (buf) / sizeof (buf[0]) - bufp, bufp);
987 subfmt = L_("%Y-%m-%d");
991 if (modifier == L_('E'))
994 DO_NUMBER (2, tp->tm_hour);
997 if (modifier == L_('E'))
1000 DO_NUMBER (2, hour12);
1002 case L_('k'): /* GNU extension. */
1003 if (modifier == L_('E'))
1006 DO_NUMBER_SPACEPAD (2, tp->tm_hour);
1008 case L_('l'): /* GNU extension. */
1009 if (modifier == L_('E'))
1012 DO_NUMBER_SPACEPAD (2, hour12);
1015 if (modifier == L_('E'))
1018 DO_NUMBER (3, 1 + tp->tm_yday);
1021 if (modifier == L_('E'))
1024 DO_NUMBER (2, tp->tm_min);
1027 if (modifier == L_('E'))
1030 DO_NUMBER (2, tp->tm_mon + 1);
1032 case L_('n'): /* POSIX.2 extension. */
1033 add (1, *p = L_('\n'));
1038 #if !defined _NL_CURRENT && HAVE_STRFTIME
1039 format_char = L_('p');
1049 #if defined _NL_CURRENT || !HAVE_STRFTIME
1053 goto underlying_strftime;
1056 case L_('R'): /* GNU extension. */
1057 subfmt = L_("%H:%M");
1060 case L_('r'): /* POSIX.2 extension. */
1062 if (*(subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME,
1063 NLW(T_FMT_AMPM))) == L_('\0'))
1065 subfmt = L_("%I:%M:%S %p");
1069 if (modifier == L_('E'))
1072 DO_NUMBER (2, tp->tm_sec);
1074 case L_('s'): /* GNU extension. */
1082 /* Generate string value for T using time_t arithmetic;
1083 this works even if sizeof (long) < sizeof (time_t). */
1085 bufp = buf + sizeof (buf) / sizeof (buf[0]);
1086 negative_number = t < 0;
1093 if (negative_number)
1097 /* Adjust if division truncates to minus infinity. */
1098 if (0 < -1 % 10 && d < 0)
1105 *--bufp = d + L_('0');
1110 goto do_number_sign_and_padding;
1114 if (modifier == L_('O'))
1117 if (! (modifier == L_('E')
1118 && (*(subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME,
1121 subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME, NLW(T_FMT));
1125 goto underlying_strftime;
1130 case L_('T'): /* POSIX.2 extension. */
1131 subfmt = L_("%H:%M:%S");
1134 case L_('t'): /* POSIX.2 extension. */
1135 add (1, *p = L_('\t'));
1138 case L_('u'): /* POSIX.2 extension. */
1139 DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1);
1142 if (modifier == L_('E'))
1145 DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7);
1148 case L_('g'): /* GNU extension. */
1149 case L_('G'): /* GNU extension. */
1150 if (modifier == L_('E'))
1153 int year = tp->tm_year + TM_YEAR_BASE;
1154 int days = iso_week_days (tp->tm_yday, tp->tm_wday);
1158 /* This ISO week belongs to the previous year. */
1160 days = iso_week_days (tp->tm_yday + (365 + __isleap (year)),
1165 int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)),
1169 /* This ISO week belongs to the next year. */
1178 DO_NUMBER (2, (year % 100 + 100) % 100);
1181 DO_NUMBER (1, year);
1184 DO_NUMBER (2, days / 7 + 1);
1189 if (modifier == L_('E'))
1192 DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7);
1195 if (modifier == L_('E'))
1198 DO_NUMBER (1, tp->tm_wday);
1201 if (modifier == 'E')
1203 #if HAVE_STRUCT_ERA_ENTRY
1204 struct era_entry *era = _nl_get_era_entry (tp);
1207 # ifdef COMPILE_WIDE
1208 subfmt = era->era_wformat;
1210 subfmt = era->era_format;
1216 goto underlying_strftime;
1220 if (modifier == L_('O'))
1223 DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE);
1226 if (modifier == L_('E'))
1228 #if HAVE_STRUCT_ERA_ENTRY
1229 struct era_entry *era = _nl_get_era_entry (tp);
1232 int delta = tp->tm_year - era->start_date[0];
1233 DO_NUMBER (1, (era->offset
1234 + delta * era->absolute_direction));
1238 goto underlying_strftime;
1242 DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100);
1252 /* The tzset() call might have changed the value. */
1253 if (!(zone && *zone) && tp->tm_isdst >= 0)
1254 zone = tzname[tp->tm_isdst];
1257 zone = ""; /* POSIX.2 requires the empty string here. */
1261 /* The zone string is always given in multibyte form. We have
1262 to transform it first. */
1265 widen (zone, wczone, len);
1269 cpy (strlen (zone), zone);
1273 case L_('z'): /* GNU extension. */
1274 if (tp->tm_isdst < 0)
1280 diff = tp->tm_gmtoff;
1293 if (lt == (time_t) -1)
1295 /* mktime returns -1 for errors, but -1 is also a
1296 valid time_t value. Check whether an error really
1300 if (! my_strftime_localtime_r (<, &tm)
1301 || ((ltm.tm_sec ^ tm.tm_sec)
1302 | (ltm.tm_min ^ tm.tm_min)
1303 | (ltm.tm_hour ^ tm.tm_hour)
1304 | (ltm.tm_mday ^ tm.tm_mday)
1305 | (ltm.tm_mon ^ tm.tm_mon)
1306 | (ltm.tm_year ^ tm.tm_year)))
1310 if (! my_strftime_gmtime_r (<, >m))
1313 diff = tm_diff (<m, >m);
1319 add (1, *p = L_('-'));
1323 add (1, *p = L_('+'));
1326 DO_NUMBER (4, (diff / 60) * 100 + diff % 60);
1329 case L_('\0'): /* GNU extension: % at end of format. */
1333 /* Unknown format; output the format, including the '%',
1334 since this is most likely the right thing to do if a
1335 multibyte string has been misparsed. */
1339 for (flen = 1; f[1 - flen] != L_('%'); flen++)
1341 cpy (flen, &f[1 - flen]);
1347 if (p && maxsize != 0)
1354 /* For Emacs we have a separate interface which corresponds to the normal
1355 strftime function and does not have the extra information whether the
1356 TP arguments comes from a `gmtime' call or not. */
1358 emacs_strftime (s, maxsize, format, tp)
1362 const struct tm *tp;
1364 return my_strftime (s, maxsize, format, tp, 0);