automatically generated from GPLed version

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;
+}