size_t len = strlen (era->era_name); cpy (len, era->era_name);
size_t len = wcslen (era->era_wname); cpy (len, era->era_wname);
my_strftime (s, maxsize, format, tp ut_argument)      CHAR_T *s;      size_t maxsize;      const CHAR_T *format;      const struct tm *tp;      ut_argument_spec{  int hour12 = tp->tm_hour;#ifdef _NL_CURRENT  /* We cannot make the following values variables since we must delay     the evaluation of these values until really needed since some     expressions might not be valid in every situation.  The `struct tm'     might be generated by a strptime() call that initialized     only a few elements.  Dereference the pointers only if the format     requires this.  Then it is ok to fail if the pointers are invalid.  */# define a_wkday \  ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABDAY_1) + tp->tm_wday))# define f_wkday \  ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(DAY_1) + tp->tm_wday))# define a_month \  ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(ABMON_1) + tp->tm_mon))# define f_month \  ((const CHAR_T *) _NL_CURRENT (LC_TIME, NLW(MON_1) + tp->tm_mon))# define ampm \  ((const CHAR_T *) _NL_CURRENT (LC_TIME, tp->tm_hour > 11		      \				 ? NLW(PM_STR) : NLW(AM_STR)))# define aw_len STRLEN (a_wkday)# define am_len STRLEN (a_month)# define ap_len STRLEN (ampm)#else# if !HAVE_STRFTIME# define f_wkday (weekday_name[tp->tm_wday])# define f_month (month_name[tp->tm_mon])# define a_wkday f_wkday# define a_month f_month# define ampm (L_("AMPM") + 2 * (tp->tm_hour > 11))  size_t aw_len = 3;  size_t am_len = 3;  size_t ap_len = 2;# endif#endif  const char *zone;  size_t i = 0;  CHAR_T *p = s;  const CHAR_T *f;  zone = NULL;#if HAVE_TM_ZONE  /* The POSIX test suite assumes that 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.     This is bogus: though POSIX allows bad behavior like this,     POSIX does not require it.  Do the right thing instead.  */  zone = (const char *) tp->tm_zone;#endif#if HAVE_TZNAME  if (ut)    {      if (! (zone && *zone))	zone = "GMT";    }  else    {      /* 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    }#endif  if (hour12 > 12)    hour12 -= 12;  else    if (hour12 == 0)      hour12 = 12;  for (f = format; *f != '\0'; ++f)    {      int pad = 0;		/* 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_T *subfmt;      CHAR_T *bufp;      CHAR_T 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;      int change_case = 0;      int format_char;#if DO_MULTIBYTE && !defined COMPILE_WIDE      switch (*f)	{	case L_('%'):	  break;	case L_('\b'): case L_('\t'): case L_('\n'):	case L_('\v'): case L_('\f'): case L_('\r'):	case L_(' '): case L_('!'): case L_('"'): case L_('#'): case L_('&'):	case L_('\''): case L_('('): case L_(')'): case L_('*'): case L_('+'):	case L_(','): case L_('-'): case L_('.'): case L_('/'): case L_('0'):	case L_('1'): case L_('2'): case L_('3'): case L_('4'): case L_('5'):	case L_('6'): case L_('7'): case L_('8'): case L_('9'): case L_(':'):	case L_(';'): case L_('<'): case L_('='): case L_('>'): case L_('?'):	case L_('A'): case L_('B'): case L_('C'): case L_('D'): case L_('E'):	case L_('F'): case L_('G'): case L_('H'): case L_('I'): case L_('J'):	case L_('K'): case L_('L'): case L_('M'): case L_('N'): case L_('O'):	case L_('P'): case L_('Q'): case L_('R'): case L_('S'): case L_('T'):	case L_('U'): case L_('V'): case L_('W'): case L_('X'): case L_('Y'):	case L_('Z'): case L_('['): case L_('\\'): case L_(']'): case L_('^'):	case L_('_'): case L_('a'): case L_('b'): case L_('c'): case L_('d'):	case L_('e'): case L_('f'): case L_('g'): case L_('h'): case L_('i'):	case L_('j'): case L_('k'): case L_('l'): case L_('m'): case L_('n'):	case L_('o'): case L_('p'): case L_('q'): case L_('r'): case L_('s'):	case L_('t'): case L_('u'): case L_('v'): case L_('w'): case L_('x'):	case L_('y'): case L_('z'): case L_('{'): case L_('|'): case L_('}'):	case L_('~'):	  /* 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)		  {		    len += strlen (f + len);		    break;		  }		if (bytes == (size_t) -1)		  {		    len++;		    break;		  }		len += bytes;	      }	    while (! mbsinit (&mbstate));	    cpy (len, f);	    f += len - 1;	    continue;	  }	}#else /* ! DO_MULTIBYTE */      /* Either multibyte encodings are not supported, they are	 safe for formats, so any non-'%' byte can be copied through,	 or this is the wide character version.  */      if (*f != L_('%'))	{	  add (1, *p = *f);	  continue;	}#endif /* ! DO_MULTIBYTE */      /* Check for flags that can modify a format.  */      while (1)	{	  switch (*++f)	    {	      /* This influences the number formats.  */	    case L_('_'):	    case L_('-'):	    case L_('0'):	      pad = *f;	      continue;	      /* This changes textual output.  */	    case L_('^'):	      to_uppcase = 1;	      continue;	    case L_('#'):	      change_case = 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 - L_('0');	      ++f;	    }	  while (ISDIGIT (*f));	}      /* Check for modifiers.  */      switch (*f)	{	case L_('E'):	case L_('O'):	  modifier = *f++;	  break;	default:	  modifier = 0;	  break;	}      /* Now do the specified format.  */      format_char = *f;      switch (format_char)	{#define DO_NUMBER(d, v) \	  digits = width == -1 ? d : width;				      \	  number_value = v; goto do_number#define DO_NUMBER_SPACEPAD(d, v) \	  digits = width == -1 ? d : width;				      \	  number_value = v; goto do_number_spacepad	case L_('%'):	  if (modifier != 0)	    goto bad_format;	  add (1, *p = *f);	  break;	case L_('a'):	  if (modifier != 0)	    goto bad_format;	  if (change_case)	    {	      to_uppcase = 1;	      to_lowcase = 0;	    }#if defined _NL_CURRENT || !HAVE_STRFTIME	  cpy (aw_len, a_wkday);	  break;#else	  goto underlying_strftime;#endif	case 'A':	  if (modifier != 0)	    goto bad_format;	  if (change_case)	    {	      to_uppcase = 1;	      to_lowcase = 0;	    }#if defined _NL_CURRENT || !HAVE_STRFTIME	  cpy (STRLEN (f_wkday), f_wkday);	  break;#else	  goto underlying_strftime;#endif	case L_('b'):	case L_('h'):		/* POSIX.2 extension.  */	  if (modifier != 0)	    goto bad_format;#if defined _NL_CURRENT || !HAVE_STRFTIME	  cpy (am_len, a_month);	  break;#else	  goto underlying_strftime;#endif	case L_('B'):	  if (modifier != 0)	    goto bad_format;	  if (change_case)	    {	      to_uppcase = 1;	      to_lowcase = 0;	    }#if defined _NL_CURRENT || !HAVE_STRFTIME	  cpy (STRLEN (f_month), f_month);	  break;#else	  goto underlying_strftime;#endif	case L_('c'):	  if (modifier == L_('O'))	    goto bad_format;#ifdef _NL_CURRENT	  if (! (modifier == 'E'		 && (*(subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME,							NLW(ERA_D_T_FMT)))		     != '\0')))	    subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_T_FMT));#else# if HAVE_STRFTIME	  goto underlying_strftime;# else	  subfmt = L_("%a %b %e %H:%M:%S %Y");# endif#endif	subformat:	  {	    CHAR_T *old_start = p;	    size_t len = my_strftime (NULL, (size_t) -1, subfmt, tp);	    add (len, my_strftime (p, maxsize - i, subfmt, tp));	    if (to_uppcase)	      while (old_start < p)		{		  *old_start = TOUPPER ((UCHAR_T) *old_start);		  ++old_start;		}	  }	  break;#if HAVE_STRFTIME && ! (defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY)	underlying_strftime:	  {	    /* The relevant information is available only via the	       underlying strftime implementation, so use that.  */	    char ufmt[4];	    char *u = ufmt;	    char ubuf[1024]; /* enough for any single format in practice */	    size_t len;	    *u++ = '%';	    if (modifier != 0)	      *u++ = modifier;	    *u++ = format_char;	    *u = '\0';	    len = strftime (ubuf, sizeof ubuf, ufmt, tp);	    if (len == 0 && ubuf[0] != '\0')	      return 0;	    cpy (len, ubuf);	  }	  break;#endif	case L_('C'):		/* POSIX.2 extension.  */	  if (modifier == L_('O'))	    goto bad_format;	  if (modifier == L_('E'))	    {#if HAVE_STRUCT_ERA_ENTRY	      struct era_entry *era = _nl_get_era_entry (tp);	      if (era)		{# ifdef COMPILE_WIDE		  size_t len = strlen (era->era_name);		  cpy (len, era->era_name);# else		  size_t len = strlen (era->era_name);		  cpy (len, era->era_name);# endif		  break;		}#else# if HAVE_STRFTIME	      goto underlying_strftime;# endif#endif	    }	  {	    int year = tp->tm_year + TM_YEAR_BASE;	    DO_NUMBER (1, year / 100 - (year % 100 < 0));	  }	case L_('x'):	  if (modifier == L_('O'))	    goto bad_format;#ifdef _NL_CURRENT	  if (! (modifier == L_('E')		 && (*(subfmt = (CHAR_T *)_NL_CURRENT (LC_TIME,						       NLW(ERA_D_FMT)))		     != L_('\0'))))	    subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME, NLW(D_FMT));	  goto subformat;#else# if HAVE_STRFTIME	  goto underlying_strftime;# else	  /* Fall through.  */# endif#endif	case L_('D'):		/* POSIX.2 extension.  */	  if (modifier != 0)	    goto bad_format;	  subfmt = L_("%m/%d/%y");	  goto subformat;	case L_('d'):	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER (2, tp->tm_mday);	case L_('e'):		/* POSIX.2 extension.  */	  if (modifier == L_('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 != L_('0'))	    pad = L_('_');	do_number:	  /* Format the number according to the MODIFIER flag.  */	  if (modifier == L_('O') && 0 <= number_value)	    {#ifdef _NL_CURRENT	      /* Get the locale specific alternate representation of		 the number NUMBER_VALUE.  If none exist NULL is returned.  */# ifdef COMPILE_WIDE	      const wchar_t *cp = _nl_get_walt_digit (number_value);# else	      const char *cp = _nl_get_alt_digit (number_value);# endif	      if (cp != NULL)		{		  size_t digitlen = STRLEN (cp);		  if (digitlen != 0)		    {		      cpy (digitlen, cp);		      break;		    }		}#else# if HAVE_STRFTIME	      goto underlying_strftime;# endif#endif	    }	  {	    unsigned int u = number_value;	    bufp = buf + sizeof (buf) / sizeof (buf[0]);	    negative_number = number_value < 0;	    if (negative_number)	      u = -u;	    do	      *--bufp = u % 10 + L_('0');	    while ((u /= 10) != 0);  	  }	do_number_sign_and_padding:	  if (negative_number)	    *--bufp = L_('-');	  if (pad != L_('-'))	    {	      int padding = digits - (buf + (sizeof (buf) / sizeof (buf[0]))				      - bufp);	      if (pad == L_('_'))		{		  while (0 < padding--)		    *--bufp = L_(' ');		}	      else		{		  bufp += negative_number;		  while (0 < padding--)		    *--bufp = L_('0');		  if (negative_number)		    *--bufp = L_('-');		}	    }	  cpy (buf + sizeof (buf) / sizeof (buf[0]) - bufp, bufp);	  break;	case L_('F'):	  if (modifier != 0)	    goto bad_format;	  subfmt = L_("%Y-%m-%d");	  goto subformat;	case L_('H'):	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER (2, tp->tm_hour);	case L_('I'):	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER (2, hour12);	case L_('k'):		/* GNU extension.  */	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER_SPACEPAD (2, tp->tm_hour);	case L_('l'):		/* GNU extension.  */	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER_SPACEPAD (2, hour12);	case L_('j'):	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER (3, 1 + tp->tm_yday);	case L_('M'):	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER (2, tp->tm_min);	case L_('m'):	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER (2, tp->tm_mon + 1);	case L_('n'):		/* POSIX.2 extension.  */	  add (1, *p = L_('\n'));	  break;	case L_('P'):	  to_lowcase = 1;#if !defined _NL_CURRENT && HAVE_STRFTIME	  format_char = L_('p');#endif	  /* FALLTHROUGH */	case L_('p'):	  if (change_case)	    {	      to_uppcase = 0;	      to_lowcase = 1;	    }#if defined _NL_CURRENT || !HAVE_STRFTIME	  cpy (ap_len, ampm);	  break;#else	  goto underlying_strftime;#endif	case L_('R'):		/* GNU extension.  */	  subfmt = L_("%H:%M");	  goto subformat;	case L_('r'):		/* POSIX.2 extension.  */#ifdef _NL_CURRENT	  if (*(subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME,						 NLW(T_FMT_AMPM))) == L_('\0'))#endif	    subfmt = L_("%I:%M:%S %p");	  goto subformat;	case L_('S'):	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER (2, tp->tm_sec);	case L_('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) / sizeof (buf[0]);	    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 + L_('0');	      }	    while (t != 0);	    digits = 1;	    goto do_number_sign_and_padding;	  }	case L_('X'):	  if (modifier == L_('O'))	    goto bad_format;#ifdef _NL_CURRENT	  if (! (modifier == L_('E')		 && (*(subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME,							NLW(ERA_T_FMT)))		     != L_('\0'))))	    subfmt = (CHAR_T *) _NL_CURRENT (LC_TIME, NLW(T_FMT));	  goto subformat;#else# if HAVE_STRFTIME	  goto underlying_strftime;# else	  /* Fall through.  */# endif#endif	case L_('T'):		/* POSIX.2 extension.  */	  subfmt = L_("%H:%M:%S");	  goto subformat;	case L_('t'):		/* POSIX.2 extension.  */	  add (1, *p = L_('\t'));	  break;	case L_('u'):		/* POSIX.2 extension.  */	  DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1);	case L_('U'):	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7);	case L_('V'):	case L_('g'):		/* GNU extension.  */	case L_('G'):		/* GNU extension.  */	  if (modifier == L_('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 L_('g'):		DO_NUMBER (2, (year % 100 + 100) % 100);	      case L_('G'):		DO_NUMBER (1, year);	      default:		DO_NUMBER (2, days / 7 + 1);	      }	  }	case L_('W'):	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7);	case L_('w'):	  if (modifier == L_('E'))	    goto bad_format;	  DO_NUMBER (1, tp->tm_wday);	case L_('Y'):	  if (modifier == 'E')	    {#if HAVE_STRUCT_ERA_ENTRY	      struct era_entry *era = _nl_get_era_entry (tp);	      if (era)		{# ifdef COMPILE_WIDE		  subfmt = era->era_wformat;# else		  subfmt = era->era_format;# endif		  goto subformat;		}#else# if HAVE_STRFTIME	      goto underlying_strftime;# endif#endif	    }	  if (modifier == L_('O'))	    goto bad_format;	  else	    DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE);	case L_('y'):	  if (modifier == L_('E'))	    {#if HAVE_STRUCT_ERA_ENTRY	      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				 + delta * era->absolute_direction));		}#else# if HAVE_STRFTIME	      goto underlying_strftime;# endif#endif	    }	  DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100);	case L_('Z'):	  if (change_case)	    {	      to_uppcase = 0;	      to_lowcase = 1;	    }#if HAVE_TZNAME	  /* The tzset() call might have changed the value.  */	  if (!(zone && *zone) && tp->tm_isdst >= 0)	    zone = tzname[tp->tm_isdst];#endif	  if (! zone)	    zone = "";		/* POSIX.2 requires the empty string here.  */#ifdef COMPILE_WIDE	  {	    /* The zone string is always given in multibyte form.  We have	       to transform it first.  */	    wchar_t *wczone;	    size_t len;	    widen (zone, wczone, len);	    cpy (len, wczone);	  }#else	  cpy (strlen (zone), zone);#endif	  break;	case L_('z'):		/* GNU extension.  */	  if (tp->tm_isdst < 0)	    break;	  {	    int diff;#if HAVE_TM_GMTOFF	    diff = tp->tm_gmtoff;#else	    if (ut)	      diff = 0;	    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;		    if (! my_strftime_localtime_r (&lt, &tm)			|| ((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 (! my_strftime_gmtime_r (&lt, &gtm))		  break;		diff = tm_diff (&ltm, &gtm);	      }#endif	    if (diff < 0)	      {		add (1, *p = L_('-'));		diff = -diff;	      }	    else	      add (1, *p = L_('+'));	    diff /= 60;	    DO_NUMBER (4, (diff / 60) * 100 + diff % 60);	  }	case L_('\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] != L_('%'); flen++)	      continue;	    cpy (flen, &f[1 - flen]);	  }	  break;	}    }  if (p && maxsize != 0)    *p = L_('\0');  return i;}