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 _strftime_copytm
464 /* Write information from TP into S according to the format
465 string FORMAT, writing no more that MAXSIZE characters
466 (including the terminating '\0') and returning number of
467 characters written. If S is NULL, nothing will be written
468 anywhere, so to determine how many characters would be
469 written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */
471 my_strftime (s, maxsize, format, tp ut_argument)
474 const CHAR_T *format;
478 int hour12 = tp->tm_hour;
480 /* We cannot make the following values variables since we must delay
481 the evaluation of these values until really needed since some
482 expressions might not be valid in every situation. The `struct tm'
483 might be generated by a strptime() call that initialized
484 only a few elements. Dereference the pointers only if the format
485 requires this. Then it is ok to fail if the pointers are invalid. */
487 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABDAY_1) + tp->tm_wday))
489 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(DAY_1) + tp->tm_wday))
491 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABMON_1) + tp->tm_mon))
493 ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(MON_1) + tp->tm_mon))
495 ((const CHAR_T *) _NL_CURRENT (LC_TIME, tp->tm_hour > 11 \
496 ? NLW(PM_STR) : NLW(AM_STR)))
498 # define aw_len STRLEN (a_wkday)
499 # define am_len STRLEN (a_month)
500 # define ap_len STRLEN (ampm)
503 # define f_wkday (weekday_name[tp->tm_wday])
504 # define f_month (month_name[tp->tm_mon])
505 # define a_wkday f_wkday
506 # define a_month f_month
507 # define ampm (L_("AMPM") + 2 * (tp->tm_hour > 11))
521 /* The POSIX test suite assumes that setting
522 the environment variable TZ to a new value before calling strftime()
523 will influence the result (the %Z format) even if the information in
524 TP is computed with a totally different time zone.
525 This is bogus: though POSIX allows bad behavior like this,
526 POSIX does not require it. Do the right thing instead. */
527 zone = (const char *) tp->tm_zone;
532 if (! (zone && *zone))
537 /* POSIX.1 8.1.1 requires that whenever strftime() is called, the
538 time zone names contained in the external variable `tzname' shall
539 be set as if the tzset() function had been called. */
552 for (f = format; *f != '\0'; ++f)
554 int pad = 0; /* Padding for number ('-', '_', or 0). */
555 int modifier; /* Field modifier ('E', 'O', or 0). */
556 int digits; /* Max digits for numeric format. */
557 int number_value; /* Numeric value to be printed. */
558 int negative_number; /* 1 if the number is negative. */
559 const CHAR_T *subfmt;
561 CHAR_T buf[1 + (sizeof (int) < sizeof (time_t)
562 ? INT_STRLEN_BOUND (time_t)
563 : INT_STRLEN_BOUND (int))];
570 #if DO_MULTIBYTE && !defined COMPILE_WIDE
576 case L_('\b'): case L_('\t'): case L_('\n'):
577 case L_('\v'): case L_('\f'): case L_('\r'):
578 case L_(' '): case L_('!'): case L_('"'): case L_('#'): case L_('&'):
579 case L_('\''): case L_('('): case L_(')'): case L_('*'): case L_('+'):
580 case L_(','): case L_('-'): case L_('.'): case L_('/'): case L_('0'):
581 case L_('1'): case L_('2'): case L_('3'): case L_('4'): case L_('5'):
582 case L_('6'): case L_('7'): case L_('8'): case L_('9'): case L_(':'):
583 case L_(';'): case L_('<'): case L_('='): case L_('>'): case L_('?'):
584 case L_('A'): case L_('B'): case L_('C'): case L_('D'): case L_('E'):
585 case L_('F'): case L_('G'): case L_('H'): case L_('I'): case L_('J'):
586 case L_('K'): case L_('L'): case L_('M'): case L_('N'): case L_('O'):
587 case L_('P'): case L_('Q'): case L_('R'): case L_('S'): case L_('T'):
588 case L_('U'): case L_('V'): case L_('W'): case L_('X'): case L_('Y'):
589 case L_('Z'): case L_('['): case L_('\\'): case L_(']'): case L_('^'):
590 case L_('_'): case L_('a'): case L_('b'): case L_('c'): case L_('d'):
591 case L_('e'): case L_('f'): case L_('g'): case L_('h'): case L_('i'):
592 case L_('j'): case L_('k'): case L_('l'): case L_('m'): case L_('n'):
593 case L_('o'): case L_('p'): case L_('q'): case L_('r'): case L_('s'):
594 case L_('t'): case L_('u'): case L_('v'): case L_('w'): case L_('x'):
595 case L_('y'): case L_('z'): case L_('{'): case L_('|'): case L_('}'):
597 /* The C Standard requires these 98 characters (plus '%') to
598 be in the basic execution character set. None of these
599 characters can start a multibyte sequence, so they need
600 not be analyzed further. */
605 /* Copy this multibyte sequence until we reach its end, find
606 an error, or come back to the initial shift state. */
608 mbstate_t mbstate = mbstate_zero;
613 size_t bytes = mbrlen (f + len, (size_t) -1, &mbstate);
618 if (bytes == (size_t) -2)
620 len += strlen (f + len);
624 if (bytes == (size_t) -1)
632 while (! mbsinit (&mbstate));
640 #else /* ! DO_MULTIBYTE */
642 /* Either multibyte encodings are not supported, they are
643 safe for formats, so any non-'%' byte can be copied through,
644 or this is the wide character version. */
651 #endif /* ! DO_MULTIBYTE */
653 /* Check for flags that can modify a format. */
658 /* This influences the number formats. */
665 /* This changes textual output. */
679 /* As a GNU extension we allow to specify the field width. */
686 width += *f - L_('0');
689 while (ISDIGIT (*f));
692 /* Check for modifiers. */
705 /* Now do the specified format. */
709 #define DO_NUMBER(d, v) \
710 digits = width == -1 ? d : width; \
711 number_value = v; goto do_number
712 #define DO_NUMBER_SPACEPAD(d, v) \
713 digits = width == -1 ? d : width; \
714 number_value = v; goto do_number_spacepad
730 #if defined _NL_CURRENT || !HAVE_STRFTIME
731 cpy (aw_len, a_wkday);
734 goto underlying_strftime;
745 #if defined _NL_CURRENT || !HAVE_STRFTIME
746 cpy (STRLEN (f_wkday), f_wkday);
749 goto underlying_strftime;
753 case L_('h'): /* POSIX.2 extension. */
761 #if defined _NL_CURRENT || !HAVE_STRFTIME
762 cpy (am_len, a_month);
765 goto underlying_strftime;
776 #if defined _NL_CURRENT || !HAVE_STRFTIME
777 cpy (STRLEN (f_month), f_month);
780 goto underlying_strftime;
784 if (modifier == L_('O'))
787 if (! (modifier == 'E'
788 && (*(subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME,
791 subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_T_FMT));
794 goto underlying_strftime;
796 subfmt = L_("%a %b %e %H:%M:%S %Y");
802 CHAR_T *old_start = p;
803 size_t len = my_strftime (NULL, (size_t) -1, subfmt,
805 add (len, my_strftime (p, maxsize - i, subfmt,
809 while (old_start < p)
811 *old_start = TOUPPER ((UCHAR_T) *old_start);
817 #if HAVE_STRFTIME && ! (defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY)
820 /* The relevant information is available only via the
821 underlying strftime implementation, so use that. */
824 char ubuf[1024]; /* enough for any single format in practice */
826 /* Make sure we're calling the actual underlying strftime.
827 In some cases, config.h contains something like
828 "#define strftime rpl_strftime". */
839 len = strftime (ubuf, sizeof ubuf, ufmt, tp);
840 if (len == 0 && ubuf[0] != '\0')
847 case L_('C'): /* POSIX.2 extension. */
848 if (modifier == L_('O'))
850 if (modifier == L_('E'))
852 #if HAVE_STRUCT_ERA_ENTRY
853 struct era_entry *era = _nl_get_era_entry (tp);
857 size_t len = __wcslen (era->era_wname);
858 cpy (len, era->era_wname);
860 size_t len = strlen (era->era_name);
861 cpy (len, era->era_name);
867 goto underlying_strftime;
873 int year = tp->tm_year + TM_YEAR_BASE;
874 DO_NUMBER (1, year / 100 - (year % 100 < 0));
878 if (modifier == L_('O'))
881 if (! (modifier == L_('E')
882 && (*(subfmt = (CHAR_T *)_NL_CURRENT (LC_TIME,
885 subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_FMT));
889 goto underlying_strftime;
894 case L_('D'): /* POSIX.2 extension. */
897 subfmt = L_("%m/%d/%y");
901 if (modifier == L_('E'))
904 DO_NUMBER (2, tp->tm_mday);
906 case L_('e'): /* POSIX.2 extension. */
907 if (modifier == L_('E'))
910 DO_NUMBER_SPACEPAD (2, tp->tm_mday);
912 /* All numeric formats set DIGITS and NUMBER_VALUE and then
913 jump to one of these two labels. */
916 /* Force `_' flag unless overwritten by `0' flag. */
921 /* Format the number according to the MODIFIER flag. */
923 if (modifier == L_('O') && 0 <= number_value)
926 /* Get the locale specific alternate representation of
927 the number NUMBER_VALUE. If none exist NULL is returned. */
929 const wchar_t *cp = _nl_get_walt_digit (number_value);
931 const char *cp = _nl_get_alt_digit (number_value);
936 size_t digitlen = STRLEN (cp);
945 goto underlying_strftime;
950 unsigned int u = number_value;
952 bufp = buf + sizeof (buf) / sizeof (buf[0]);
953 negative_number = number_value < 0;
959 *--bufp = u % 10 + L_('0');
960 while ((u /= 10) != 0);
963 do_number_sign_and_padding:
969 int padding = digits - (buf + (sizeof (buf) / sizeof (buf[0]))
974 while (0 < padding--)
979 bufp += negative_number;
980 while (0 < padding--)
987 cpy (buf + sizeof (buf) / sizeof (buf[0]) - bufp, bufp);
993 subfmt = L_("%Y-%m-%d");
997 if (modifier == L_('E'))
1000 DO_NUMBER (2, tp->tm_hour);
1003 if (modifier == L_('E'))
1006 DO_NUMBER (2, hour12);
1008 case L_('k'): /* GNU extension. */
1009 if (modifier == L_('E'))
1012 DO_NUMBER_SPACEPAD (2, tp->tm_hour);
1014 case L_('l'): /* GNU extension. */
1015 if (modifier == L_('E'))
1018 DO_NUMBER_SPACEPAD (2, hour12);
1021 if (modifier == L_('E'))
1024 DO_NUMBER (3, 1 + tp->tm_yday);
1027 if (modifier == L_('E'))
1030 DO_NUMBER (2, tp->tm_min);
1033 if (modifier == L_('E'))
1036 DO_NUMBER (2, tp->tm_mon + 1);
1038 case L_('n'): /* POSIX.2 extension. */
1039 add (1, *p = L_('\n'));
1044 #if !defined _NL_CURRENT && HAVE_STRFTIME
1045 format_char = L_('p');
1055 #if defined _NL_CURRENT || !HAVE_STRFTIME
1059 goto underlying_strftime;
1062 case L_('R'): /* GNU extension. */
1063 subfmt = L_("%H:%M");
1066 case L_('r'): /* POSIX.2 extension. */
1068 if (*(subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME,
1069 NLW(T_FMT_AMPM))) == L_('\0'))
1071 subfmt = L_("%I:%M:%S %p");
1075 if (modifier == L_('E'))
1078 DO_NUMBER (2, tp->tm_sec);
1080 case L_('s'): /* GNU extension. */
1088 /* Generate string value for T using time_t arithmetic;
1089 this works even if sizeof (long) < sizeof (time_t). */
1091 bufp = buf + sizeof (buf) / sizeof (buf[0]);
1092 negative_number = t < 0;
1099 if (negative_number)
1103 /* Adjust if division truncates to minus infinity. */
1104 if (0 < -1 % 10 && d < 0)
1111 *--bufp = d + L_('0');
1116 goto do_number_sign_and_padding;
1120 if (modifier == L_('O'))
1123 if (! (modifier == L_('E')
1124 && (*(subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME,
1127 subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME, NLW(T_FMT));
1131 goto underlying_strftime;
1136 case L_('T'): /* POSIX.2 extension. */
1137 subfmt = L_("%H:%M:%S");
1140 case L_('t'): /* POSIX.2 extension. */
1141 add (1, *p = L_('\t'));
1144 case L_('u'): /* POSIX.2 extension. */
1145 DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1);
1148 if (modifier == L_('E'))
1151 DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7);
1154 case L_('g'): /* GNU extension. */
1155 case L_('G'): /* GNU extension. */
1156 if (modifier == L_('E'))
1159 int year = tp->tm_year + TM_YEAR_BASE;
1160 int days = iso_week_days (tp->tm_yday, tp->tm_wday);
1164 /* This ISO week belongs to the previous year. */
1166 days = iso_week_days (tp->tm_yday + (365 + __isleap (year)),
1171 int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)),
1175 /* This ISO week belongs to the next year. */
1184 DO_NUMBER (2, (year % 100 + 100) % 100);
1187 DO_NUMBER (1, year);
1190 DO_NUMBER (2, days / 7 + 1);
1195 if (modifier == L_('E'))
1198 DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7);
1201 if (modifier == L_('E'))
1204 DO_NUMBER (1, tp->tm_wday);
1207 if (modifier == 'E')
1209 #if HAVE_STRUCT_ERA_ENTRY
1210 struct era_entry *era = _nl_get_era_entry (tp);
1213 # ifdef COMPILE_WIDE
1214 subfmt = era->era_wformat;
1216 subfmt = era->era_format;
1222 goto underlying_strftime;
1226 if (modifier == L_('O'))
1229 DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE);
1232 if (modifier == L_('E'))
1234 #if HAVE_STRUCT_ERA_ENTRY
1235 struct era_entry *era = _nl_get_era_entry (tp);
1238 int delta = tp->tm_year - era->start_date[0];
1239 DO_NUMBER (1, (era->offset
1240 + delta * era->absolute_direction));
1244 goto underlying_strftime;
1248 DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100);
1258 /* The tzset() call might have changed the value. */
1259 if (!(zone && *zone) && tp->tm_isdst >= 0)
1260 zone = tzname[tp->tm_isdst];
1263 zone = ""; /* POSIX.2 requires the empty string here. */
1267 /* The zone string is always given in multibyte form. We have
1268 to transform it first. */
1271 widen (zone, wczone, len);
1275 cpy (strlen (zone), zone);
1279 case L_('z'): /* GNU extension. */
1280 if (tp->tm_isdst < 0)
1286 diff = tp->tm_gmtoff;
1299 if (lt == (time_t) -1)
1301 /* mktime returns -1 for errors, but -1 is also a
1302 valid time_t value. Check whether an error really
1306 if (! my_strftime_localtime_r (<, &tm)
1307 || ((ltm.tm_sec ^ tm.tm_sec)
1308 | (ltm.tm_min ^ tm.tm_min)
1309 | (ltm.tm_hour ^ tm.tm_hour)
1310 | (ltm.tm_mday ^ tm.tm_mday)
1311 | (ltm.tm_mon ^ tm.tm_mon)
1312 | (ltm.tm_year ^ tm.tm_year)))
1316 if (! my_strftime_gmtime_r (<, >m))
1319 diff = tm_diff (<m, >m);
1325 add (1, *p = L_('-'));
1329 add (1, *p = L_('+'));
1332 DO_NUMBER (4, (diff / 60) * 100 + diff % 60);
1335 case L_('\0'): /* GNU extension: % at end of format. */
1339 /* Unknown format; output the format, including the '%',
1340 since this is most likely the right thing to do if a
1341 multibyte string has been misparsed. */
1345 for (flen = 1; f[1 - flen] != L_('%'); flen++)
1347 cpy (flen, &f[1 - flen]);
1353 if (p && maxsize != 0)
1360 /* For Emacs we have a separate interface which corresponds to the normal
1361 strftime function and does not have the extra information whether the
1362 TP arguments comes from a `gmtime' call or not. */
1364 emacs_strftime (s, maxsize, format, tp)
1368 const struct tm *tp;
1370 return my_strftime (s, maxsize, format, tp, 0);