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/*

FUNCTION

<>, <>---select or query locale

INDEX

	setlocale

INDEX

	localeconv

INDEX

	_setlocale_r

INDEX

	_localeconv_r

ANSI_SYNOPSIS

	#include 

	char *setlocale(int <[category]>, const char *<[locale]>);

	lconv *localeconv(void);

	char *_setlocale_r(void *<[reent]>,

                        int <[category]>, const char *<[locale]>);

	lconv *_localeconv_r(void *<[reent]>);

TRAD_SYNOPSIS

	#include 

	char *setlocale(<[category]>, <[locale]>)

	int <[category]>;

	char *<[locale]>;

	lconv *localeconv();

	char *_setlocale_r(<[reent]>, <[category]>, <[locale]>)

	char *<[reent]>;

	int <[category]>;

	char *<[locale]>;

	lconv *_localeconv_r(<[reent]>);

	char *<[reent]>;

DESCRIPTION

<> is the facility defined by ANSI C to condition the

execution environment for international collating and formatting

information; <> reports on the settings of the current

locale.

This is a minimal implementation, supporting only the required <<"POSIX">>

and <<"C">> values for <[locale]>; strings representing other locales are not

honored unless _MB_CAPABLE is defined.

If _MB_CAPABLE is defined, POSIX locale strings are allowed, following

the form

  language[_TERRITORY][.charset][@@modifier]

<<"language">> is a two character string per ISO 639, or, if not available

for a given language, a three character string per ISO 639-3.

<<"TERRITORY">> is a country code per ISO 3166.  For <<"charset">> and

<<"modifier">> see below.

Additionally to the POSIX specifier, the following extension is supported

for backward compatibility with older implementations using newlib:

<<"C-charset">>.

Instead of <<"C-">>, you can also specify <<"C.">>.  Both variations allow

to specify language neutral locales while using other charsets than ASCII,

for instance <<"C.UTF-8">>, which keeps all settings as in the C locale,

but uses the UTF-8 charset.

The following charsets are recognized:

<<"UTF-8">>, <<"JIS">>, <<"EUCJP">>, <<"SJIS">>, <<"KOI8-R">>, <<"KOI8-U">>,

<<"GEORGIAN-PS">>, <<"PT154">>, <<"TIS-620">>, <<"ISO-8859-x">> with

1 <= x <= 16, or <<"CPxxx">> with xxx in [437, 720, 737, 775, 850, 852, 855,

857, 858, 862, 866, 874, 932, 1125, 1250, 1251, 1252, 1253, 1254, 1255, 1256,

1257, 1258].

Charsets are case insensitive.  For instance, <<"EUCJP">> and <<"eucJP">>

are equivalent.  Charset names with dashes can also be written without

dashes, as in <<"UTF8">>, <<"iso88591">> or <<"koi8r">>.  <<"EUCJP">> and

<<"EUCKR">> are also recognized with dash, <<"EUC-JP">> and <<"EUC-KR">>.

Full support for all of the above charsets requires that newlib has been

build with multibyte support and support for all ISO and Windows Codepage.

Otherwise all singlebyte charsets are simply mapped to ASCII.  Right now,

only newlib for Cygwin is built with full charset support by default.

Under Cygwin, this implementation additionally supports the charsets

<<"GBK">>, <<"GB2312">>, <<"eucCN">>, <<"eucKR">>, and <<"Big5">>.  Cygwin

does not support <<"JIS">>.

Cygwin additionally supports locales from the file

/usr/share/locale/locale.alias.

(<<"">> is also accepted; if given, the settings are read from the

corresponding LC_* environment variables and $LANG according to POSIX rules.

This implementation also supports the modifier <<"cjknarrow">>, which

affects how the functions <> and <> handle characters

from the "CJK Ambiguous Width" category of characters described at

http://www.unicode.org/reports/tr11/#Ambiguous. These characters have a width

of 1 for singlebyte charsets and a width of 2 for multibyte charsets

other than UTF-8. For UTF-8, their width depends on the language specifier:

it is 2 for <<"zh">> (Chinese), <<"ja">> (Japanese), and <<"ko">> (Korean),

and 1 for everything else. Specifying <<"cjknarrow">> forces a width of 1,

independent of charset and language.

If you use <> as the <[locale]> argument, <> returns a

pointer to the string representing the current locale.  The acceptable

values for <[category]> are defined in `<>' as macros

beginning with <<"LC_">>.

<> returns a pointer to a structure (also defined in

`<>') describing the locale-specific conventions currently

in effect.

<<_localeconv_r>> and <<_setlocale_r>> are reentrant versions of

<> and <> respectively.  The extra argument

<[reent]> is a pointer to a reentrancy structure.

RETURNS

A successful call to <> returns a pointer to a string

associated with the specified category for the new locale.  The string

returned by <> is such that a subsequent call using that

string will restore that category (or all categories in case of LC_ALL),

to that state.  The application shall not modify the string returned

which may be overwritten by a subsequent call to <>.

On error, <> returns <>.

<> returns a pointer to a structure of type <>,

which describes the formatting and collating conventions in effect (in

this implementation, always those of the C locale).

PORTABILITY

ANSI C requires <>, but the only locale required across all

implementations is the C locale.

NOTES

There is no ISO-8859-12 codepage.  It's also refused by this implementation.

No supporting OS subroutines are required.

*/

/* Parts of this code are originally taken from FreeBSD. */

/*

 * Copyright (c) 1996 - 2002 FreeBSD Project

 * Copyright (c) 1991, 1993

 *      The Regents of the University of California.  All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * Paul Borman at Krystal Technologies.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include "lmessages.h"

#include "lmonetary.h"

#include "lnumeric.h"

#include "lctype.h"

#include "timelocal.h"

#include "../stdlib/local.h"

#define _LC_LAST      7

#define ENCODING_LEN 31

#ifdef __CYGWIN__ /* Cygwin starts with LC_CTYPE set to "C.UTF-8". */

int __EXPORT __mb_cur_max = 6;

#else

int __EXPORT __mb_cur_max = 1;

#endif

int __nlocale_changed = 0;

int __mlocale_changed = 0;

char *_PathLocale = NULL;

static

struct lconv lconv =

{

  ".", "", "", "", "", "", "", "", "", "",

  CHAR_MAX, CHAR_MAX, CHAR_MAX, CHAR_MAX,

  CHAR_MAX, CHAR_MAX, CHAR_MAX, CHAR_MAX,

  CHAR_MAX, CHAR_MAX, CHAR_MAX, CHAR_MAX,

  CHAR_MAX, CHAR_MAX

};

#ifdef _MB_CAPABLE

/*

 * Category names for getenv()

 */

static char *categories[_LC_LAST] = {

  "LC_ALL",

  "LC_COLLATE",

  "LC_CTYPE",

  "LC_MONETARY",

  "LC_NUMERIC",

  "LC_TIME",

  "LC_MESSAGES",

};

/*

 * Default locale per POSIX.  Can be overridden on a per-target base.

 */

#ifndef DEFAULT_LOCALE

#define DEFAULT_LOCALE	"C"

#endif

/*

 * This variable can be changed by any outside mechanism.  This allows,

 * for instance, to load the default locale from a file.

 */

char __default_locale[ENCODING_LEN + 1] = DEFAULT_LOCALE;

/*

 * Current locales for each category

 */

static char current_categories[_LC_LAST][ENCODING_LEN + 1] = {

    "C",

    "C",

#ifdef __CYGWIN__ /* Cygwin starts with LC_CTYPE set to "C.UTF-8". */

    "C.UTF-8",

#else

    "C",

#endif

    "C",

    "C",

    "C",

    "C",

};

/*

 * The locales we are going to try and load

 */

static char new_categories[_LC_LAST][ENCODING_LEN + 1];

static char saved_categories[_LC_LAST][ENCODING_LEN + 1];

static char current_locale_string[_LC_LAST * (ENCODING_LEN + 1/*"/"*/ + 1)];

static char *currentlocale(void);

static char *loadlocale(struct _reent *, int);

static const char *__get_locale_env(struct _reent *, int);

#endif /* _MB_CAPABLE */

#ifdef __CYGWIN__

static char lc_ctype_charset[ENCODING_LEN + 1] = "UTF-8";

#else

static char lc_ctype_charset[ENCODING_LEN + 1] = "ASCII";

#endif

static char lc_message_charset[ENCODING_LEN + 1] = "ASCII";

static int lc_ctype_cjk_lang = 0;

char *

_DEFUN(_setlocale_r, (p, category, locale),

       struct _reent *p _AND

       int category _AND

       _CONST char *locale)

{

#ifndef _MB_CAPABLE

  if (locale)

    {

      if (strcmp (locale, "POSIX") && strcmp (locale, "C")

	  && strcmp (locale, ""))

        return NULL;

    }

  return "C";

#else /* !_MB_CAPABLE */

  int i, j, len, saverr;

  const char *env, *r;

  if (category < LC_ALL || category >= _LC_LAST)

    {

      p->_errno = EINVAL;

      return NULL;

    }

  if (locale == NULL)

    return category != LC_ALL ? current_categories[category] : currentlocale();

  /*

   * Default to the current locale for everything.

   */

  for (i = 1; i < _LC_LAST; ++i)

    strcpy (new_categories[i], current_categories[i]);

  /*

   * Now go fill up new_categories from the locale argument

   */

  if (!*locale)

    {

      if (category == LC_ALL)

	{

	  for (i = 1; i < _LC_LAST; ++i)

	    {

	      env = __get_locale_env (p, i);

	      if (strlen (env) > ENCODING_LEN)

		{

		  p->_errno = EINVAL;

		  return NULL;

		}

	      strcpy (new_categories[i], env);

	    }

	}

      else

	{

	  env = __get_locale_env (p, category);

	  if (strlen (env) > ENCODING_LEN)

	    {

	      p->_errno = EINVAL;

	      return NULL;

	    }

	  strcpy (new_categories[category], env);

	}

    }

  else if (category != LC_ALL)

    {

      if (strlen (locale) > ENCODING_LEN)

	{

	  p->_errno = EINVAL;

	  return NULL;

	}

      strcpy (new_categories[category], locale);

    }

  else

    {

      if ((r = strchr (locale, '/')) == NULL)

	{

	  if (strlen (locale) > ENCODING_LEN)

	    {

	      p->_errno = EINVAL;

	      return NULL;

	    }

	  for (i = 1; i < _LC_LAST; ++i)

	    strcpy (new_categories[i], locale);

	}

      else

	{

	  for (i = 1; r[1] == '/'; ++r)

	    ;

	  if (!r[1])

	    {

	      p->_errno = EINVAL;

	      return NULL;  /* Hmm, just slashes... */

	    }

	  do

	    {

	      if (i == _LC_LAST)

		break;  /* Too many slashes... */

	      if ((len = r - locale) > ENCODING_LEN)

		{

		  p->_errno = EINVAL;

		  return NULL;

		}

	      strlcpy (new_categories[i], locale, len + 1);

	      i++;

	      while (*r == '/')

		r++;

	      locale = r;

	      while (*r && *r != '/')

		r++;

	    }

	  while (*locale);

	  while (i < _LC_LAST)

	    {

	      strcpy (new_categories[i], new_categories[i-1]);

	      i++;

	    }

	}

    }

  if (category != LC_ALL)

    return loadlocale (p, category);

  for (i = 1; i < _LC_LAST; ++i)

    {

      strcpy (saved_categories[i], current_categories[i]);

      if (loadlocale (p, i) == NULL)

	{

	  saverr = p->_errno;

	  for (j = 1; j < i; j++)

	    {

	      strcpy (new_categories[j], saved_categories[j]);

	      if (loadlocale (p, j) == NULL)

		{

		  strcpy (new_categories[j], "C");

		  loadlocale (p, j);

		}

	    }

	  p->_errno = saverr;

	  return NULL;

	}

    }

  return currentlocale ();

#endif /* !_MB_CAPABLE */

}

#ifdef _MB_CAPABLE

static char *

currentlocale()

{

        int i;

        (void)strcpy(current_locale_string, current_categories[1]);

        for (i = 2; i < _LC_LAST; ++i)

                if (strcmp(current_categories[1], current_categories[i])) {

                        for (i = 2; i < _LC_LAST; ++i) {

                                (void)strcat(current_locale_string, "/");

                                (void)strcat(current_locale_string,

                                             current_categories[i]);

                        }

                        break;

                }

        return (current_locale_string);

}

#endif /* _MB_CAPABLE */

#ifdef _MB_CAPABLE

#ifdef __CYGWIN__

extern void __set_charset_from_locale (const char *locale, char *charset);

extern char *__set_locale_from_locale_alias (const char *, char *);

extern int __collate_load_locale (const char *, void *, const char *);

#endif /* __CYGWIN__ */

extern void __set_ctype (const char *charset);

static char *

loadlocale(struct _reent *p, int category)

{

  /* At this point a full-featured system would just load the locale

     specific data from the locale files.

     What we do here for now is to check the incoming string for correctness.

     The string must be in one of the allowed locale strings, either

     one in POSIX-style, or one in the old newlib style to maintain

     backward compatibility.  If the local string is correct, the charset

     is extracted and stored in lc_ctype_charset or lc_message_charset

     dependent on the cateogry. */

  char *locale = NULL;

  char charset[ENCODING_LEN + 1];

  unsigned long val;

  char *end, *c = NULL;

  int mbc_max;

  int (*l_wctomb) (struct _reent *, char *, wchar_t, const char *, mbstate_t *);

  int (*l_mbtowc) (struct _reent *, wchar_t *, const char *, size_t,

		   const char *, mbstate_t *);

  int cjknarrow = 0;

  /* Avoid doing everything twice if nothing has changed. */

  if (!strcmp (new_categories[category], current_categories[category]))

    return current_categories[category];

#ifdef __CYGWIN__

  /* This additional code handles the case that the incoming locale string

     is not valid.  If so, it calls the function __set_locale_from_locale_alias,

     which is only available on Cygwin right now.  The function reads the

     file /usr/share/locale/locale.alias.  The file contains locale aliases

     and their replacement locale.  For instance, the alias "french" is

     translated to "fr_FR.ISO-8859-1", the alias "thai" is translated to

     "th_TH.TIS-620".  If successful, the function returns with a pointer

     to the second argument, which is a buffer in which the replacement locale

     gets stored.  Otherwise the function returns NULL. */

  char tmp_locale[ENCODING_LEN + 1];

  int ret = 0;

restart:

  if (!locale)

    locale = new_categories[category];

  else if (locale != tmp_locale)

    {

      locale = __set_locale_from_locale_alias (locale, tmp_locale);

      if (!locale)

	return NULL;

    }

# define FAIL	goto restart

#else

  locale = new_categories[category];

# define FAIL	return NULL

#endif

  /* "POSIX" is translated to "C", as on Linux. */

  if (!strcmp (locale, "POSIX"))

    strcpy (locale, "C");

  if (!strcmp (locale, "C"))				/* Default "C" locale */

    strcpy (charset, "ASCII");

  else if (locale[0] == 'C'

	   && (locale[1] == '-'		/* Old newlib style */

	       || locale[1] == '.'))	/* Extension for the C locale to allow

					   specifying different charsets while

					   sticking to the C locale in terms

					   of sort order, etc.  Proposed in

					   the Debian project. */

    {

      char *chp;

      c = locale + 2;

      strcpy (charset, c);

      if ((chp = strchr (charset, '@')))

        /* Strip off modifier */

        *chp = '\0';

      c += strlen (charset);

    }

  else							/* POSIX style */

    {

      c = locale;

      /* Don't use ctype macros here, they might be localized. */

      /* Language */

      if (c[0] < 'a' || c[0] > 'z'

	  || c[1] < 'a' || c[1] > 'z')

	FAIL;

      c += 2;

      /* Allow three character Language per ISO 639-3 */

      if (c[0] >= 'a' && c[0] <= 'z')

      	++c;

      if (c[0] == '_')

        {

	  /* Territory */

	  ++c;

	  if (c[0] < 'A' || c[0] > 'Z'

	      || c[1] < 'A' || c[1] > 'Z')

	    FAIL;

	  c += 2;

	}

      if (c[0] == '.')

	{

	  /* Charset */

	  char *chp;

	  ++c;

	  strcpy (charset, c);

	  if ((chp = strchr (charset, '@')))

	    /* Strip off modifier */

	    *chp = '\0';

	  c += strlen (charset);

	}

      else if (c[0] == '\0' || c[0] == '@')

	/* End of string or just a modifier */

#ifdef __CYGWIN__

	/* The Cygwin-only function __set_charset_from_locale checks

	   for the default charset which is connected to the given locale.

	   The function uses Windows functions in turn so it can't be easily

	   adapted to other targets.  However, if any other target provides

	   equivalent functionality, preferrably using the same function name

	   it would be sufficient to change the guarding #ifdef. */

	__set_charset_from_locale (locale, charset);

#else

	strcpy (charset, "ISO-8859-1");

#endif

      else

	/* Invalid string */

      	FAIL;

    }

  if (c && c[0] == '@')

	{

	  /* Modifier */

	  /* Only one modifier is recognized right now.  "cjknarrow" is used

	     to modify the behaviour of wcwidth() for East Asian languages.

	     For details see the comment at the end of this function. */

	  if (!strcmp (c + 1, "cjknarrow"))

	    cjknarrow = 1;

	}

  /* We only support this subset of charsets. */

  switch (charset[0])

    {

    case 'U':

    case 'u':

      if (strcasecmp (charset, "UTF-8") && strcasecmp (charset, "UTF8"))

	FAIL;

      strcpy (charset, "UTF-8");

      mbc_max = 6;

      l_wctomb = __utf8_wctomb;

      l_mbtowc = __utf8_mbtowc;

    break;

#ifndef __CYGWIN__

    /* Cygwin does not support JIS at all. */

    case 'J':

    case 'j':

      if (strcasecmp (charset, "JIS"))

	FAIL;

      strcpy (charset, "JIS");

      mbc_max = 8;

      l_wctomb = __jis_wctomb;

      l_mbtowc = __jis_mbtowc;

    break;

#endif /* !__CYGWIN__ */

    case 'E':

    case 'e':

      if (strncasecmp (charset, "EUC", 3))

	FAIL;

      c = charset + 3;

      if (*c == '-')

	++c;

      if (!strcasecmp (c, "JP"))

	{

	  strcpy (charset, "EUCJP");

	  mbc_max = 3;

	  l_wctomb = __eucjp_wctomb;

	  l_mbtowc = __eucjp_mbtowc;

	}

#ifdef __CYGWIN__

      /* Newlib does neither provide EUC-KR nor EUC-CN, and Cygwin's

      	 implementation requires Windows support. */

      else if (!strcasecmp (c, "KR"))

	{

	  strcpy (charset, "EUCKR");

	  mbc_max = 2;

	  l_wctomb = __kr_wctomb;

	  l_mbtowc = __kr_mbtowc;

	}

      else if (!strcasecmp (c, "CN"))

	{

	  strcpy (charset, "EUCCN");

	  mbc_max = 2;

	  l_wctomb = __gbk_wctomb;

	  l_mbtowc = __gbk_mbtowc;

	}

#endif /* __CYGWIN__ */

      else

	FAIL;

    break;

    case 'S':

    case 's':

      if (strcasecmp (charset, "SJIS"))

	FAIL;

      strcpy (charset, "SJIS");

      mbc_max = 2;

      l_wctomb = __sjis_wctomb;

      l_mbtowc = __sjis_mbtowc;

    break;

    case 'I':

    case 'i':

      /* Must be exactly one of ISO-8859-1, [...] ISO-8859-16, except for

         ISO-8859-12.  This code also recognizes the aliases without dashes. */

      if (strncasecmp (charset, "ISO", 3))

	FAIL;

      c = charset + 3;

      if (*c == '-')

	++c;

      if (strncasecmp (c, "8859", 4))

	FAIL;

      c += 4;

      if (*c == '-')

	++c;

      val = _strtol_r (p, c, &end, 10);

      if (val < 1 || val > 16 || val == 12 || *end)

	FAIL;

      strcpy (charset, "ISO-8859-");

      c = charset + 9;

      if (val > 10)

      	*c++ = '1';

      *c++ = val % 10 + '0';

      *c = '\0';

      mbc_max = 1;

#ifdef _MB_EXTENDED_CHARSETS_ISO

      l_wctomb = __iso_wctomb;

      l_mbtowc = __iso_mbtowc;

#else /* !_MB_EXTENDED_CHARSETS_ISO */

      l_wctomb = __ascii_wctomb;

      l_mbtowc = __ascii_mbtowc;

#endif /* _MB_EXTENDED_CHARSETS_ISO */

    break;

    case 'C':

    case 'c':

      if (charset[1] != 'P' && charset[1] != 'p')

	FAIL;

      strncpy (charset, "CP", 2);

      val = _strtol_r (p, charset + 2, &end, 10);

      if (*end)

	FAIL;

      switch (val)

	{

	case 437:

	case 720:

	case 737:

	case 775:

	case 850:

	case 852:

	case 855:

	case 857:

	case 858:

	case 862:

	case 866:

	case 874:

	case 1125:

	case 1250:

	case 1251:

	case 1252:

	case 1253:

	case 1254:

	case 1255:

	case 1256:

	case 1257:

	case 1258:

	  mbc_max = 1;

#ifdef _MB_EXTENDED_CHARSETS_WINDOWS

	  l_wctomb = __cp_wctomb;

	  l_mbtowc = __cp_mbtowc;

#else /* !_MB_EXTENDED_CHARSETS_WINDOWS */

	  l_wctomb = __ascii_wctomb;

	  l_mbtowc = __ascii_mbtowc;

#endif /* _MB_EXTENDED_CHARSETS_WINDOWS */

	  break;

	case 932:

	  mbc_max = 2;

	  l_wctomb = __sjis_wctomb;

	  l_mbtowc = __sjis_mbtowc;

	  break;

	default:

	  FAIL;

	}

    break;

    case 'K':

    case 'k':

      /* KOI8-R, KOI8-U and the aliases without dash */

      if (strncasecmp (charset, "KOI8", 4))

	FAIL;

      c = charset + 4;

      if (*c == '-')

	++c;

      if (*c == 'R' || *c == 'r')

	strcpy (charset, "CP20866");

      else if (*c == 'U' || *c == 'u')

	strcpy (charset, "CP21866");

      else

	FAIL;

      mbc_max = 1;

#ifdef _MB_EXTENDED_CHARSETS_WINDOWS

      l_wctomb = __cp_wctomb;

      l_mbtowc = __cp_mbtowc;

#else /* !_MB_EXTENDED_CHARSETS_WINDOWS */

      l_wctomb = __ascii_wctomb;

      l_mbtowc = __ascii_mbtowc;

#endif /* _MB_EXTENDED_CHARSETS_WINDOWS */

      break;

    case 'A':

    case 'a':

      if (strcasecmp (charset, "ASCII"))

	FAIL;

      strcpy (charset, "ASCII");

      mbc_max = 1;

      l_wctomb = __ascii_wctomb;

      l_mbtowc = __ascii_mbtowc;

      break;

    case 'G':

    case 'g':

#ifdef __CYGWIN__

      /* Newlib does not provide GBK/GB2312 and Cygwin's implementation

	 requires Windows support. */

      if (!strcasecmp (charset, "GBK")

	  || !strcasecmp (charset, "GB2312"))

      	{

	  strcpy (charset, charset[2] == '2' ? "GB2312" : "GBK");

      mbc_max = 2;

      l_wctomb = __gbk_wctomb;

      l_mbtowc = __gbk_mbtowc;

	}

      else

#endif /* __CYGWIN__ */

      /* GEORGIAN-PS and the alias without dash */

      if (!strncasecmp (charset, "GEORGIAN", 8))

	{

	  c = charset + 8;

	  if (*c == '-')

	    ++c;

	  if (strcasecmp (c, "PS"))

	    FAIL;

	  strcpy (charset, "CP101");

	  mbc_max = 1;

#ifdef _MB_EXTENDED_CHARSETS_WINDOWS

	  l_wctomb = __cp_wctomb;

	  l_mbtowc = __cp_mbtowc;

#else /* !_MB_EXTENDED_CHARSETS_WINDOWS */

	  l_wctomb = __ascii_wctomb;

	  l_mbtowc = __ascii_mbtowc;

#endif /* _MB_EXTENDED_CHARSETS_WINDOWS */

	}

      else

	FAIL;

      break;

    case 'P':

    case 'p':

      /* PT154 */

      if (strcasecmp (charset, "PT154"))

	FAIL;

      strcpy (charset, "CP102");

      mbc_max = 1;

#ifdef _MB_EXTENDED_CHARSETS_WINDOWS

      l_wctomb = __cp_wctomb;

      l_mbtowc = __cp_mbtowc;

#else /* !_MB_EXTENDED_CHARSETS_WINDOWS */

      l_wctomb = __ascii_wctomb;

      l_mbtowc = __ascii_mbtowc;

#endif /* _MB_EXTENDED_CHARSETS_WINDOWS */

      break;

    case 'T':

    case 't':

      if (strncasecmp (charset, "TIS", 3))

      	FAIL;

      c = charset + 3;

      if (*c == '-')

	++c;

      if (strcasecmp (c, "620"))

      	FAIL;

      strcpy (charset, "CP874");

      mbc_max = 1;

#ifdef _MB_EXTENDED_CHARSETS_WINDOWS

      l_wctomb = __cp_wctomb;

      l_mbtowc = __cp_mbtowc;

#else /* !_MB_EXTENDED_CHARSETS_WINDOWS */

      l_wctomb = __ascii_wctomb;

      l_mbtowc = __ascii_mbtowc;

#endif /* _MB_EXTENDED_CHARSETS_WINDOWS */

      break;

#ifdef __CYGWIN__

    /* Newlib does not provide Big5 and Cygwin's implementation

       requires Windows support. */

    case 'B':

    case 'b':

      if (strcasecmp (charset, "BIG5"))

      	FAIL;

      strcpy (charset, "BIG5");

      mbc_max = 2;

      l_wctomb = __big5_wctomb;

      l_mbtowc = __big5_mbtowc;

      break;

#endif /* __CYGWIN__ */

    default:

      FAIL;

    }

  switch (category)

    {

    case LC_CTYPE:

      strcpy (lc_ctype_charset, charset);

      __mb_cur_max = mbc_max;

      __wctomb = l_wctomb;

      __mbtowc = l_mbtowc;

      __set_ctype (charset);

      /* Determine the width for the "CJK Ambiguous Width" category of

         characters. This is used in wcwidth(). Assume single width for

         single-byte charsets, and double width for multi-byte charsets

         other than UTF-8. For UTF-8, use double width for the East Asian

         languages ("ja", "ko", "zh"), and single width for everything else.

         Single width can also be forced with the "@cjknarrow" modifier. */

      lc_ctype_cjk_lang = !cjknarrow

			  && mbc_max > 1

			  && (charset[0] != 'U'

			      || strncmp (locale, "ja", 2) == 0

			      || strncmp (locale, "ko", 2) == 0

			      || strncmp (locale, "zh", 2) == 0);

#ifdef __HAVE_LOCALE_INFO__

      ret = __ctype_load_locale (locale, (void *) l_wctomb, charset, mbc_max);

#endif /* __HAVE_LOCALE_INFO__ */

      break;

    case LC_MESSAGES:

      strcpy (lc_message_charset, charset);

#ifdef __HAVE_LOCALE_INFO__

      ret = __messages_load_locale (locale, (void *) l_wctomb, charset);

      if (!ret)

#endif /* __HAVE_LOCALE_INFO__ */

      break;

#ifdef __HAVE_LOCALE_INFO__

#ifdef __CYGWIN__

  /* Right now only Cygwin supports a __collate_load_locale function at all. */

    case LC_COLLATE:

      ret = __collate_load_locale (locale, (void *) l_mbtowc, charset);

      break;

#endif

    case LC_MONETARY:

      ret = __monetary_load_locale (locale, (void *) l_wctomb, charset);

      break;

    case LC_NUMERIC:

      ret = __numeric_load_locale (locale, (void *) l_wctomb, charset);

      break;

    case LC_TIME:

      ret = __time_load_locale (locale, (void *) l_wctomb, charset);

      break;

#endif /* __HAVE_LOCALE_INFO__ */

    default:

      break;

    }

#ifdef __HAVE_LOCALE_INFO__

  if (ret)

    FAIL;

#endif /* __HAVE_LOCALE_INFO__ */

  return strcpy(current_categories[category], new_categories[category]);

}

static const char *

__get_locale_env(struct _reent *p, int category)

{

  const char *env;

  /* 1. check LC_ALL. */

  env = _getenv_r (p, categories[0]);

  /* 2. check LC_* */

  if (env == NULL || !*env)

    env = _getenv_r (p, categories[category]);

  /* 3. check LANG */

  if (env == NULL || !*env)

    env = _getenv_r (p, "LANG");

  /* 4. if none is set, fall to default locale */

  if (env == NULL || !*env)

    env = __default_locale;

  return env;

}

#endif /* _MB_CAPABLE */

char *

_DEFUN_VOID(__locale_charset)

{

#if 0//def __HAVE_LOCALE_INFO__

  return __get_current_ctype_locale ()->codeset;

#else

  return lc_ctype_charset;

#endif

}

int

_DEFUN_VOID(__locale_mb_cur_max)

{

#if 0//def __HAVE_LOCALE_INFO__

  return __get_current_ctype_locale ()->mb_cur_max[0];

#else

  return __mb_cur_max;

#endif

}

char *

_DEFUN_VOID(__locale_msgcharset)

{

#ifdef __HAVE_LOCALE_INFO__

  return (char *) __get_current_messages_locale ()->codeset;

#else

  return lc_message_charset;

#endif

}

int

_DEFUN_VOID(__locale_cjk_lang)

{

  return lc_ctype_cjk_lang;

}

struct lconv *

_DEFUN(_localeconv_r, (data),

      struct _reent *data)

{

#ifdef __HAVE_LOCALE_INFO__

  if (__nlocale_changed)

    {

      struct lc_numeric_T *n = __get_current_numeric_locale ();

      lconv.decimal_point = (char *) n->decimal_point;

      lconv.thousands_sep = (char *) n->thousands_sep;

      lconv.grouping = (char *) n->grouping;

      __nlocale_changed = 0;

    }

  if (__mlocale_changed)

    {

      struct lc_monetary_T *m = __get_current_monetary_locale ();

      lconv.int_curr_symbol = (char *) m->int_curr_symbol;

      lconv.currency_symbol = (char *) m->currency_symbol;

      lconv.mon_decimal_point = (char *) m->mon_decimal_point;

      lconv.mon_thousands_sep = (char *) m->mon_thousands_sep;

      lconv.mon_grouping = (char *) m->mon_grouping;

      lconv.positive_sign = (char *) m->positive_sign;

      lconv.negative_sign = (char *) m->negative_sign;

      lconv.int_frac_digits = m->int_frac_digits[0];

      lconv.frac_digits = m->frac_digits[0];

      lconv.p_cs_precedes = m->p_cs_precedes[0];

      lconv.p_sep_by_space = m->p_sep_by_space[0];

      lconv.n_cs_precedes = m->n_cs_precedes[0];

      lconv.n_sep_by_space = m->n_sep_by_space[0];

      lconv.p_sign_posn = m->p_sign_posn[0];

      lconv.n_sign_posn = m->n_sign_posn[0];

#ifdef __HAVE_LOCALE_INFO_EXTENDED__

      lconv.int_p_cs_precedes = m->int_p_cs_precedes[0];

      lconv.int_p_sep_by_space = m->int_p_sep_by_space[0];

      lconv.int_n_cs_precedes = m->int_n_cs_precedes[0];

      lconv.int_n_sep_by_space = m->int_n_sep_by_space[0];

      lconv.int_n_sign_posn = m->int_n_sign_posn[0];

      lconv.int_p_sign_posn = m->int_p_sign_posn[0];

#else /* !__HAVE_LOCALE_INFO_EXTENDED__ */

      lconv.int_p_cs_precedes = m->p_cs_precedes[0];

      lconv.int_p_sep_by_space = m->p_sep_by_space[0];

      lconv.int_n_cs_precedes = m->n_cs_precedes[0];

      lconv.int_n_sep_by_space = m->n_sep_by_space[0];

      lconv.int_n_sign_posn = m->n_sign_posn[0];

      lconv.int_p_sign_posn = m->p_sign_posn[0];

#endif /* !__HAVE_LOCALE_INFO_EXTENDED__ */

      __mlocale_changed = 0;

    }

#endif /* __HAVE_LOCALE_INFO__ */

  return (struct lconv *) &lconv;

}

#ifndef _REENT_ONLY

#ifndef __CYGWIN__

/* Cygwin provides its own version of setlocale to perform some more

   initialization work.  It calls _setlocale_r, though. */

char *

_DEFUN(setlocale, (category, locale),

       int category _AND

       _CONST char *locale)

{

  return _setlocale_r (_REENT, category, locale);

}

#endif /* __CYGWIN__ */

struct lconv *

_DEFUN_VOID(localeconv)

{

  return _localeconv_r (_REENT);

}

#endif