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authorPaul Eggert <eggert@twinsun.com>1997-04-18 00:48:01 +0000
committerPaul Eggert <eggert@twinsun.com>1997-04-18 00:48:01 +0000
commita617a82f0e728a78206ea6dcfc5f385513a70509 (patch)
treef90aac9720c67e87ef20911ac4125d0dee88325e /src/strftime.c
parenta4f23658b91f891d920de08e3fe08615f16bd326 (diff)
downloademacs-a617a82f0e728a78206ea6dcfc5f385513a70509.tar.gz
automatically generated from GPLed version
Diffstat (limited to 'src/strftime.c')
-rw-r--r--src/strftime.c1055
1 files changed, 1055 insertions, 0 deletions
diff --git a/src/strftime.c b/src/strftime.c
new file mode 100644
index 00000000000..c0cc077b072
--- /dev/null
+++ b/src/strftime.c
@@ -0,0 +1,1055 @@
+/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
+
+NOTE: The canonical source of this file is maintained with the GNU C Library.
+Bugs can be reported to bug-glibc@prep.ai.mit.edu.
+
+This program is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+USA. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#ifdef _LIBC
+# define HAVE_LIMITS_H 1
+# define HAVE_MBLEN 1
+# define HAVE_MBRLEN 1
+# define HAVE_STRUCT_ERA_ENTRY 1
+# define HAVE_TM_GMTOFF 1
+# define HAVE_TM_ZONE 1
+# define HAVE_TZNAME 1
+# define HAVE_TZSET 1
+# define MULTIBYTE_IS_FORMAT_SAFE 1
+# define STDC_HEADERS 1
+# include <ansidecl.h>
+# include "../locale/localeinfo.h"
+#endif
+
+#include <ctype.h>
+#include <sys/types.h> /* Some systems define `time_t' here. */
+
+#ifdef TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# include <time.h>
+# endif
+#endif
+#if HAVE_TZNAME
+extern char *tzname[];
+#endif
+
+/* Do multibyte processing if multibytes are supported, unless
+ multibyte sequences are safe in formats. Multibyte sequences are
+ safe if they cannot contain byte sequences that look like format
+ conversion specifications. The GNU C Library uses UTF8 multibyte
+ encoding, which is safe for formats, but strftime.c can be used
+ with other C libraries that use unsafe encodings. */
+#define DO_MULTIBYTE (HAVE_MBLEN && ! MULTIBYTE_IS_FORMAT_SAFE)
+
+#if DO_MULTIBYTE
+# if HAVE_MBRLEN
+# include <wchar.h>
+# else
+ /* Simulate mbrlen with mblen as best we can. */
+# define mbstate_t int
+# define mbrlen(s, n, ps) mblen (s, n)
+# define mbsinit(ps) (*(ps) == 0)
+# endif
+ static const mbstate_t mbstate_zero;
+#endif
+
+#if HAVE_LIMITS_H
+# include <limits.h>
+#endif
+
+#if STDC_HEADERS
+# include <stddef.h>
+# include <stdlib.h>
+# include <string.h>
+#else
+# define memcpy(d, s, n) bcopy ((s), (d), (n))
+#endif
+
+#ifndef __P
+# if defined (__GNUC__) || (defined (__STDC__) && __STDC__)
+# define __P(args) args
+# else
+# define __P(args) ()
+# endif /* GCC. */
+#endif /* Not __P. */
+
+#ifndef PTR
+# ifdef __STDC__
+# define PTR void *
+# else
+# define PTR char *
+# endif
+#endif
+
+#ifndef CHAR_BIT
+# define CHAR_BIT 8
+#endif
+
+#ifndef NULL
+# define NULL 0
+#endif
+
+#define TYPE_SIGNED(t) ((t) -1 < 0)
+
+/* Bound on length of the string representing an integer value of type t.
+ Subtract one for the sign bit if t is signed;
+ 302 / 1000 is log10 (2) rounded up;
+ add one for integer division truncation;
+ add one more for a minus sign if t is signed. */
+#define INT_STRLEN_BOUND(t) \
+ ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 100 + 1 + TYPE_SIGNED (t))
+
+#define TM_YEAR_BASE 1900
+
+#ifndef __isleap
+/* Nonzero if YEAR is a leap year (every 4 years,
+ except every 100th isn't, and every 400th is). */
+# define __isleap(year) \
+ ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
+#endif
+
+
+#ifdef _LIBC
+# define gmtime_r __gmtime_r
+# define localtime_r __localtime_r
+extern int __tz_compute __P ((time_t timer, const struct tm *tm));
+# define tzname __tzname
+# define tzset __tzset
+#else
+# if ! HAVE_LOCALTIME_R
+# if ! HAVE_TM_GMTOFF
+/* Approximate gmtime_r as best we can in its absence. */
+# define gmtime_r my_gmtime_r
+static struct tm *gmtime_r __P ((const time_t *, struct tm *));
+static struct tm *
+gmtime_r (t, tp)
+ const time_t *t;
+ struct tm *tp;
+{
+ struct tm *l = gmtime (t);
+ if (! l)
+ return 0;
+ *tp = *l;
+ return tp;
+}
+# endif /* ! HAVE_TM_GMTOFF */
+
+/* Approximate localtime_r as best we can in its absence. */
+# define localtime_r my_localtime_r
+static struct tm *localtime_r __P ((const time_t *, struct tm *));
+static struct tm *
+localtime_r (t, tp)
+ const time_t *t;
+ struct tm *tp;
+{
+ struct tm *l = localtime (t);
+ if (! l)
+ return 0;
+ *tp = *l;
+ return tp;
+}
+# endif /* ! HAVE_LOCALTIME_R */
+#endif /* ! defined (_LIBC) */
+
+
+#if !defined (memset) && !defined (HAVE_MEMSET) && !defined (_LIBC)
+/* Some systems lack the `memset' function and we don't want to
+ introduce additional dependencies. */
+static const char spaces[16] = " ";
+
+# define memset_space(P, Len) \
+ do { \
+ int _len = (Len); \
+ \
+ do \
+ { \
+ int _this = _len > 16 ? 16 : _len; \
+ memcpy ((P), spaces, _this); \
+ (P) += _this; \
+ _len -= _this; \
+ } \
+ while (_len > 0); \
+ } while (0)
+#else
+# define memset_space(P, Len) (memset ((P), ' ', (Len)), (P) += (Len))
+#endif
+
+#define add(n, f) \
+ do \
+ { \
+ int _n = (n); \
+ int _delta = width - _n; \
+ int _incr = _n + (_delta > 0 ? _delta : 0); \
+ if (i + _incr >= maxsize) \
+ return 0; \
+ if (p) \
+ { \
+ if (_delta > 0) \
+ memset_space (p, _delta); \
+ f; \
+ p += _n; \
+ } \
+ i += _incr; \
+ } while (0)
+
+#define cpy(n, s) \
+ add ((n), \
+ if (to_lowcase) \
+ memcpy_lowcase (p, (s), _n); \
+ else if (to_uppcase) \
+ memcpy_uppcase (p, (s), _n); \
+ else \
+ memcpy ((PTR) p, (PTR) (s), _n))
+
+
+
+#ifdef _LIBC
+# define TOUPPER(Ch) toupper (Ch)
+# define TOLOWER(Ch) tolower (Ch)
+#else
+# define TOUPPER(Ch) (islower (Ch) ? toupper (Ch) : (Ch))
+# define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch))
+#endif
+/* We don't use `isdigit' here since the locale dependent
+ interpretation is not what we want here. We only need to accept
+ the arabic digits in the ASCII range. One day there is perhaps a
+ more reliable way to accept other sets of digits. */
+#define ISDIGIT(Ch) ((unsigned int) (Ch) - '0' <= 9)
+
+static char *memcpy_lowcase __P ((char *dest, const char *src, size_t len));
+
+static char *
+memcpy_lowcase (dest, src, len)
+ char *dest;
+ const char *src;
+ size_t len;
+{
+ while (len-- > 0)
+ dest[len] = TOLOWER (src[len]);
+ return dest;
+}
+
+static char *memcpy_uppcase __P ((char *dest, const char *src, size_t len));
+
+static char *
+memcpy_uppcase (dest, src, len)
+ char *dest;
+ const char *src;
+ size_t len;
+{
+ while (len-- > 0)
+ dest[len] = TOUPPER (src[len]);
+ return dest;
+}
+
+#if ! HAVE_TM_GMTOFF
+/* Yield the difference between *A and *B,
+ measured in seconds, ignoring leap seconds. */
+static int tm_diff __P ((const struct tm *, const struct tm *));
+static int
+tm_diff (a, b)
+ const struct tm *a;
+ const struct tm *b;
+{
+ /* Compute intervening leap days correctly even if year is negative.
+ Take care to avoid int overflow in leap day calculations,
+ but it's OK to assume that A and B are close to each other. */
+ int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3);
+ int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3);
+ int a100 = a4 / 25 - (a4 % 25 < 0);
+ int b100 = b4 / 25 - (b4 % 25 < 0);
+ int a400 = a100 >> 2;
+ int b400 = b100 >> 2;
+ int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
+ int years = a->tm_year - b->tm_year;
+ int days = (365 * years + intervening_leap_days
+ + (a->tm_yday - b->tm_yday));
+ return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
+ + (a->tm_min - b->tm_min))
+ + (a->tm_sec - b->tm_sec));
+}
+#endif /* ! HAVE_TM_GMTOFF */
+
+
+
+/* The number of days from the first day of the first ISO week of this
+ year to the year day YDAY with week day WDAY. ISO weeks start on
+ Monday; the first ISO week has the year's first Thursday. YDAY may
+ be as small as YDAY_MINIMUM. */
+#define ISO_WEEK_START_WDAY 1 /* Monday */
+#define ISO_WEEK1_WDAY 4 /* Thursday */
+#define YDAY_MINIMUM (-366)
+static int iso_week_days __P ((int, int));
+#ifdef __GNUC__
+inline
+#endif
+static int
+iso_week_days (yday, wday)
+ int yday;
+ int wday;
+{
+ /* Add enough to the first operand of % to make it nonnegative. */
+ int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7;
+ return (yday
+ - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7
+ + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY);
+}
+
+
+#ifndef _NL_CURRENT
+static char const weekday_name[][10] =
+ {
+ "Sunday", "Monday", "Tuesday", "Wednesday",
+ "Thursday", "Friday", "Saturday"
+ };
+static char const month_name[][10] =
+ {
+ "January", "February", "March", "April", "May", "June",
+ "July", "August", "September", "October", "November", "December"
+ };
+#endif
+
+
+#if !defined _LIBC && HAVE_TZNAME && HAVE_TZSET
+ /* Solaris 2.5 tzset sometimes modifies the storage returned by localtime.
+ Work around this bug by copying *tp before it might be munged. */
+ size_t _strftime_copytm __P ((char *, size_t, const char *,
+ const struct tm *));
+ size_t
+ strftime (s, maxsize, format, tp)
+ char *s;
+ size_t maxsize;
+ const char *format;
+ const struct tm *tp;
+ {
+ struct tm tmcopy;
+ tmcopy = *tp;
+ return _strftime_copytm (s, maxsize, format, &tmcopy);
+ }
+# ifdef strftime
+# undef strftime
+# endif
+# define strftime(S, Maxsize, Format, Tp) \
+ _strftime_copytm (S, Maxsize, Format, Tp)
+#endif
+
+
+/* Write information from TP into S according to the format
+ string FORMAT, writing no more that MAXSIZE characters
+ (including the terminating '\0') and returning number of
+ characters written. If S is NULL, nothing will be written
+ anywhere, so to determine how many characters would be
+ written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */
+size_t
+strftime (s, maxsize, format, tp)
+ char *s;
+ size_t maxsize;
+ const char *format;
+ const struct tm *tp;
+{
+ int hour12 = tp->tm_hour;
+#ifdef _NL_CURRENT
+ const char *const a_wkday = _NL_CURRENT (LC_TIME, ABDAY_1 + tp->tm_wday);
+ const char *const f_wkday = _NL_CURRENT (LC_TIME, DAY_1 + tp->tm_wday);
+ const char *const a_month = _NL_CURRENT (LC_TIME, ABMON_1 + tp->tm_mon);
+ const char *const f_month = _NL_CURRENT (LC_TIME, MON_1 + tp->tm_mon);
+ const char *const ampm = _NL_CURRENT (LC_TIME,
+ hour12 > 11 ? PM_STR : AM_STR);
+ size_t aw_len = strlen (a_wkday);
+ size_t am_len = strlen (a_month);
+ size_t ap_len = strlen (ampm);
+#else
+ const char *const f_wkday = weekday_name[tp->tm_wday];
+ const char *const f_month = month_name[tp->tm_mon];
+ const char *const a_wkday = f_wkday;
+ const char *const a_month = f_month;
+ const char *const ampm = "AMPM" + 2 * (hour12 > 11);
+ size_t aw_len = 3;
+ size_t am_len = 3;
+ size_t ap_len = 2;
+#endif
+ size_t wkday_len = strlen (f_wkday);
+ size_t month_len = strlen (f_month);
+ const char *zone;
+ size_t zonelen;
+ size_t i = 0;
+ char *p = s;
+ const char *f;
+
+ zone = NULL;
+#if !defined _LIBC && HAVE_TM_ZONE
+ /* XXX We have some problems here. First, the string pointed to by
+ tm_zone is dynamically allocated while loading the zone data. But
+ when another zone is loaded since the information in TP were
+ computed this would be a stale pointer.
+ The second problem is the POSIX test suite which assumes setting
+ the environment variable TZ to a new value before calling strftime()
+ will influence the result (the %Z format) even if the information in
+ TP is computed with a totally different time zone. --drepper@gnu */
+ zone = (const char *) tp->tm_zone;
+#endif
+#if HAVE_TZNAME
+ /* POSIX.1 8.1.1 requires that whenever strftime() is called, the
+ time zone names contained in the external variable `tzname' shall
+ be set as if the tzset() function had been called. */
+# if HAVE_TZSET
+ tzset ();
+# endif
+
+ if (!(zone && *zone) && tp->tm_isdst >= 0)
+ zone = tzname[tp->tm_isdst];
+#endif
+ if (! zone)
+ zone = ""; /* POSIX.2 requires the empty string here. */
+
+ zonelen = strlen (zone);
+
+ if (hour12 > 12)
+ hour12 -= 12;
+ else
+ if (hour12 == 0) hour12 = 12;
+
+ for (f = format; *f != '\0'; ++f)
+ {
+ int pad; /* Padding for number ('-', '_', or 0). */
+ int modifier; /* Field modifier ('E', 'O', or 0). */
+ int digits; /* Max digits for numeric format. */
+ int number_value; /* Numeric value to be printed. */
+ int negative_number; /* 1 if the number is negative. */
+ const char *subfmt;
+ char *bufp;
+ char buf[1 + (sizeof (int) < sizeof (time_t)
+ ? INT_STRLEN_BOUND (time_t)
+ : INT_STRLEN_BOUND (int))];
+ int width = -1;
+ int to_lowcase = 0;
+ int to_uppcase = 0;
+
+#if DO_MULTIBYTE
+
+ switch (*f)
+ {
+ case '%':
+ break;
+
+ case '\a': case '\b': case '\t': case '\n':
+ case '\v': case '\f': case '\r':
+ case ' ': case '!': case '"': case '#': case '&': case'\'':
+ case '(': case ')': case '*': case '+': case ',': case '-':
+ case '.': case '/': case '0': case '1': case '2': case '3':
+ case '4': case '5': case '6': case '7': case '8': case '9':
+ case ':': case ';': case '<': case '=': case '>': case '?':
+ case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+ case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
+ case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
+ case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
+ case 'Y': case 'Z': case '[': case'\\': case ']': case '^':
+ case '_': case 'a': case 'b': case 'c': case 'd': case 'e':
+ case 'f': case 'g': case 'h': case 'i': case 'j': case 'k':
+ case 'l': case 'm': case 'n': case 'o': case 'p': case 'q':
+ case 'r': case 's': case 't': case 'u': case 'v': case 'w':
+ case 'x': case 'y': case 'z': case '{': case '|': case '}':
+ case '~':
+ /* The C Standard requires these 98 characters (plus '%') to
+ be in the basic execution character set. None of these
+ characters can start a multibyte sequence, so they need
+ not be analyzed further. */
+ add (1, *p = *f);
+ continue;
+
+ default:
+ /* Copy this multibyte sequence until we reach its end, find
+ an error, or come back to the initial shift state. */
+ {
+ mbstate_t mbstate = mbstate_zero;
+ size_t len = 0;
+
+ do
+ {
+ size_t bytes = mbrlen (f + len, (size_t) -1, &mbstate);
+
+ if (bytes == 0)
+ break;
+
+ if (bytes == (size_t) -2 || bytes == (size_t) -1)
+ {
+ len++;
+ break;
+ }
+
+ len += bytes;
+ }
+ while (! mbsinit (&mbstate));
+
+ cpy (len, f);
+ continue;
+ }
+ }
+
+#else /* ! DO_MULTIBYTE */
+
+ /* Either multibyte encodings are not supported, or they are
+ safe for formats, so any non-'%' byte can be copied through. */
+ if (*f != '%')
+ {
+ add (1, *p = *f);
+ continue;
+ }
+
+#endif /* ! DO_MULTIBYTE */
+
+ /* Check for flags that can modify a format. */
+ pad = 0;
+ while (1)
+ {
+ switch (*++f)
+ {
+ /* This influences the number formats. */
+ case '_':
+ case '-':
+ case '0':
+ pad = *f;
+ continue;
+
+ /* This changes textual output. */
+ case '^':
+ to_uppcase = 1;
+ continue;
+
+ default:
+ break;
+ }
+ break;
+ }
+
+ /* As a GNU extension we allow to specify the field width. */
+ if (ISDIGIT (*f))
+ {
+ width = 0;
+ do
+ {
+ width *= 10;
+ width += *f - '0';
+ ++f;
+ }
+ while (ISDIGIT (*f));
+ }
+
+ /* Check for modifiers. */
+ switch (*f)
+ {
+ case 'E':
+ case 'O':
+ modifier = *f++;
+ break;
+
+ default:
+ modifier = 0;
+ break;
+ }
+
+ /* Now do the specified format. */
+ switch (*f)
+ {
+#define DO_NUMBER(d, v) \
+ digits = d; number_value = v; goto do_number
+#define DO_NUMBER_SPACEPAD(d, v) \
+ digits = d; number_value = v; goto do_number_spacepad
+
+ case '%':
+ if (modifier != 0)
+ goto bad_format;
+ add (1, *p = *f);
+ break;
+
+ case 'a':
+ if (modifier != 0)
+ goto bad_format;
+ cpy (aw_len, a_wkday);
+ break;
+
+ case 'A':
+ if (modifier != 0)
+ goto bad_format;
+ cpy (wkday_len, f_wkday);
+ break;
+
+ case 'b':
+ case 'h': /* POSIX.2 extension. */
+ if (modifier != 0)
+ goto bad_format;
+ cpy (am_len, a_month);
+ break;
+
+ case 'B':
+ if (modifier != 0)
+ goto bad_format;
+ cpy (month_len, f_month);
+ break;
+
+ case 'c':
+ if (modifier == 'O')
+ goto bad_format;
+#ifdef _NL_CURRENT
+ if (! (modifier == 'E'
+ && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_T_FMT)) != '\0'))
+ subfmt = _NL_CURRENT (LC_TIME, D_T_FMT);
+#else
+ subfmt = "%a %b %e %H:%M:%S %Y";
+#endif
+
+ subformat:
+ {
+ char *old_start = p;
+ size_t len = strftime (NULL, maxsize - i, subfmt, tp);
+ if (len == 0 && *subfmt)
+ return 0;
+ add (len, strftime (p, maxsize - i, subfmt, tp));
+
+ if (to_uppcase)
+ while (old_start < p)
+ {
+ *old_start = TOUPPER (*old_start);
+ ++old_start;
+ }
+ }
+ break;
+
+ case 'C': /* POSIX.2 extension. */
+ if (modifier == 'O')
+ goto bad_format;
+#if HAVE_STRUCT_ERA_ENTRY
+ if (modifier == 'E')
+ {
+ struct era_entry *era = _nl_get_era_entry (tp);
+ if (era)
+ {
+ size_t len = strlen (era->name_fmt);
+ cpy (len, era->name_fmt);
+ break;
+ }
+ }
+#endif
+ {
+ int year = tp->tm_year + TM_YEAR_BASE;
+ DO_NUMBER (1, year / 100 - (year % 100 < 0));
+ }
+
+ case 'x':
+ if (modifier == 'O')
+ goto bad_format;
+#ifdef _NL_CURRENT
+ if (! (modifier == 'E'
+ && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_FMT)) != '\0'))
+ subfmt = _NL_CURRENT (LC_TIME, D_FMT);
+ goto subformat;
+#endif
+ /* Fall through. */
+ case 'D': /* POSIX.2 extension. */
+ if (modifier != 0)
+ goto bad_format;
+ subfmt = "%m/%d/%y";
+ goto subformat;
+
+ case 'd':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, tp->tm_mday);
+
+ case 'e': /* POSIX.2 extension. */
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER_SPACEPAD (2, tp->tm_mday);
+
+ /* All numeric formats set DIGITS and NUMBER_VALUE and then
+ jump to one of these two labels. */
+
+ do_number_spacepad:
+ /* Force `_' flag unless overwritten by `0' flag. */
+ if (pad != '0')
+ pad = '_';
+
+ do_number:
+ /* Format the number according to the MODIFIER flag. */
+
+#ifdef _NL_CURRENT
+ if (modifier == 'O' && 0 <= number_value)
+ {
+ /* Get the locale specific alternate representation of
+ the number NUMBER_VALUE. If none exist NULL is returned. */
+ const char *cp = _nl_get_alt_digit (number_value);
+
+ if (cp != NULL)
+ {
+ size_t digitlen = strlen (cp);
+ if (digitlen != 0)
+ {
+ cpy (digitlen, cp);
+ break;
+ }
+ }
+ }
+#endif
+ {
+ unsigned int u = number_value;
+
+ bufp = buf + sizeof (buf);
+ negative_number = number_value < 0;
+
+ if (negative_number)
+ u = -u;
+
+ do
+ *--bufp = u % 10 + '0';
+ while ((u /= 10) != 0);
+ }
+
+ do_number_sign_and_padding:
+ if (negative_number)
+ *--bufp = '-';
+
+ if (pad != '-')
+ {
+ int padding = digits - (buf + sizeof (buf) - bufp);
+
+ if (pad == '_')
+ {
+ while (0 < padding--)
+ *--bufp = ' ';
+ }
+ else
+ {
+ bufp += negative_number;
+ while (0 < padding--)
+ *--bufp = '0';
+ if (negative_number)
+ *--bufp = '-';
+ }
+ }
+
+ cpy (buf + sizeof (buf) - bufp, bufp);
+ break;
+
+
+ case 'H':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, tp->tm_hour);
+
+ case 'I':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, hour12);
+
+ case 'k': /* GNU extension. */
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER_SPACEPAD (2, tp->tm_hour);
+
+ case 'l': /* GNU extension. */
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER_SPACEPAD (2, hour12);
+
+ case 'j':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (3, 1 + tp->tm_yday);
+
+ case 'M':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, tp->tm_min);
+
+ case 'm':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, tp->tm_mon + 1);
+
+ case 'n': /* POSIX.2 extension. */
+ add (1, *p = '\n');
+ break;
+
+ case 'P':
+ to_lowcase = 1;
+ /* FALLTHROUGH */
+
+ case 'p':
+ cpy (ap_len, ampm);
+ break;
+
+ case 'R': /* GNU extension. */
+ subfmt = "%H:%M";
+ goto subformat;
+
+ case 'r': /* POSIX.2 extension. */
+#ifdef _NL_CURRENT
+ if (*(subfmt = _NL_CURRENT (LC_TIME, T_FMT_AMPM)) == '\0')
+#endif
+ subfmt = "%I:%M:%S %p";
+ goto subformat;
+
+ case 'S':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, tp->tm_sec);
+
+ case 's': /* GNU extension. */
+ {
+ struct tm ltm;
+ time_t t;
+
+ ltm = *tp;
+ t = mktime (&ltm);
+
+ /* Generate string value for T using time_t arithmetic;
+ this works even if sizeof (long) < sizeof (time_t). */
+
+ bufp = buf + sizeof (buf);
+ negative_number = t < 0;
+
+ do
+ {
+ int d = t % 10;
+ t /= 10;
+
+ if (negative_number)
+ {
+ d = -d;
+
+ /* Adjust if division truncates to minus infinity. */
+ if (0 < -1 % 10 && d < 0)
+ {
+ t++;
+ d += 10;
+ }
+ }
+
+ *--bufp = d + '0';
+ }
+ while (t != 0);
+
+ digits = 1;
+ goto do_number_sign_and_padding;
+ }
+
+ case 'X':
+ if (modifier == 'O')
+ goto bad_format;
+#ifdef _NL_CURRENT
+ if (! (modifier == 'E'
+ && *(subfmt = _NL_CURRENT (LC_TIME, ERA_T_FMT)) != '\0'))
+ subfmt = _NL_CURRENT (LC_TIME, T_FMT);
+ goto subformat;
+#endif
+ /* Fall through. */
+ case 'T': /* POSIX.2 extension. */
+ subfmt = "%H:%M:%S";
+ goto subformat;
+
+ case 't': /* POSIX.2 extension. */
+ add (1, *p = '\t');
+ break;
+
+ case 'u': /* POSIX.2 extension. */
+ DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1);
+
+ case 'U':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7);
+
+ case 'V':
+ case 'g': /* GNU extension. */
+ case 'G': /* GNU extension. */
+ if (modifier == 'E')
+ goto bad_format;
+ {
+ int year = tp->tm_year + TM_YEAR_BASE;
+ int days = iso_week_days (tp->tm_yday, tp->tm_wday);
+
+ if (days < 0)
+ {
+ /* This ISO week belongs to the previous year. */
+ year--;
+ days = iso_week_days (tp->tm_yday + (365 + __isleap (year)),
+ tp->tm_wday);
+ }
+ else
+ {
+ int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)),
+ tp->tm_wday);
+ if (0 <= d)
+ {
+ /* This ISO week belongs to the next year. */
+ year++;
+ days = d;
+ }
+ }
+
+ switch (*f)
+ {
+ case 'g':
+ DO_NUMBER (2, (year % 100 + 100) % 100);
+
+ case 'G':
+ DO_NUMBER (1, year);
+
+ default:
+ DO_NUMBER (2, days / 7 + 1);
+ }
+ }
+
+ case 'W':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7);
+
+ case 'w':
+ if (modifier == 'E')
+ goto bad_format;
+
+ DO_NUMBER (1, tp->tm_wday);
+
+ case 'Y':
+#if HAVE_STRUCT_ERA_ENTRY
+ if (modifier == 'E')
+ {
+ struct era_entry *era = _nl_get_era_entry (tp);
+ if (era)
+ {
+ subfmt = strchr (era->name_fmt, '\0') + 1;
+ goto subformat;
+ }
+ }
+#endif
+ if (modifier == 'O')
+ goto bad_format;
+ else
+ DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE);
+
+ case 'y':
+#if HAVE_STRUCT_ERA_ENTRY
+ if (modifier == 'E')
+ {
+ struct era_entry *era = _nl_get_era_entry (tp);
+ if (era)
+ {
+ int delta = tp->tm_year - era->start_date[0];
+ DO_NUMBER (1, (era->offset
+ + (era->direction == '-' ? -delta : delta)));
+ }
+ }
+#endif
+ DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100);
+
+ case 'Z':
+ cpy (zonelen, zone);
+ break;
+
+ case 'z': /* GNU extension. */
+ if (tp->tm_isdst < 0)
+ break;
+
+ {
+ int diff;
+#if HAVE_TM_GMTOFF
+ diff = tp->tm_gmtoff;
+#else
+ struct tm gtm;
+ struct tm ltm;
+ time_t lt;
+
+ ltm = *tp;
+ lt = mktime (&ltm);
+
+ if (lt == (time_t) -1)
+ {
+ /* mktime returns -1 for errors, but -1 is also a
+ valid time_t value. Check whether an error really
+ occurred. */
+ struct tm tm;
+ localtime_r (&lt, &tm);
+
+ if ((ltm.tm_sec ^ tm.tm_sec)
+ | (ltm.tm_min ^ tm.tm_min)
+ | (ltm.tm_hour ^ tm.tm_hour)
+ | (ltm.tm_mday ^ tm.tm_mday)
+ | (ltm.tm_mon ^ tm.tm_mon)
+ | (ltm.tm_year ^ tm.tm_year))
+ break;
+ }
+
+ if (! gmtime_r (&lt, &gtm))
+ break;
+
+ diff = tm_diff (&ltm, &gtm);
+#endif
+
+ if (diff < 0)
+ {
+ add (1, *p = '-');
+ diff = -diff;
+ }
+ else
+ add (1, *p = '+');
+
+ diff /= 60;
+ DO_NUMBER (4, (diff / 60) * 100 + diff % 60);
+ }
+
+ case '\0': /* GNU extension: % at end of format. */
+ --f;
+ /* Fall through. */
+ default:
+ /* Unknown format; output the format, including the '%',
+ since this is most likely the right thing to do if a
+ multibyte string has been misparsed. */
+ bad_format:
+ {
+ int flen;
+ for (flen = 1; f[1 - flen] != '%'; flen++)
+ continue;
+ cpy (flen, &f[1 - flen]);
+ }
+ break;
+ }
+ }
+
+ if (p)
+ *p = '\0';
+ return i;
+}