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// Wrapper for underlying C-language localization -*- C++ -*-

// Copyright (C) 2001, 2002, 2003, 2004, 2005

// Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library 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 library 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 library; see the file COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// As a special exception, you may use this file as part of a free software

// library without restriction.  Specifically, if other files instantiate

// templates or use macros or inline functions from this file, or you compile

// this file and link it with other files to produce an executable, this

// file does not by itself cause the resulting executable to be covered by

// the GNU General Public License.  This exception does not however

// invalidate any other reasons why the executable file might be covered by

// the GNU General Public License.

//

// ISO C++ 14882: 22.8  Standard locale categories.

//

// Written by Benjamin Kosnik <bkoz@redhat.com>

#include <cerrno>  // For errno

#include <cmath>  // For isinf, finite, finitef, fabs

#include <cstdlib>  // For strof, strtold

#include <locale>

#ifdef _GLIBCXX_HAVE_IEEEFP_H

#include <ieeefp.h>

#endif

namespace std

{

  // Specializations for all types used in num_get.

  template<>

    void

    __convert_to_v(const char* __s, float& __v, ios_base::iostate& __err,

                   const __c_locale&)

    {

      // Assumes __s formatted for "C" locale.

      errno = 0;

      char* __old = strdup(setlocale(LC_ALL, NULL));

      setlocale(LC_ALL, "C");

      char* __sanity;

#if defined(_GLIBCXX_HAVE_STRTOF)

      float __f = strtof(__s, &__sanity);

#else

      double __d = strtod(__s, &__sanity);

      float __f = static_cast<float>(__d);

#ifdef _GLIBCXX_HAVE_FINITEF

      if (!finitef (__f))

        errno = ERANGE;

#elif defined (_GLIBCXX_HAVE_FINITE)

      if (!finite (static_cast<double> (__f)))

        errno = ERANGE;

#elif defined (_GLIBCXX_HAVE_ISINF)

      if (isinf (static_cast<double> (__f)))

        errno = ERANGE;

#else

      if (fabs(__d) > numeric_limits<float>::max())

        errno = ERANGE;

#endif

#endif

      if (__sanity != __s && errno != ERANGE)

        __v = __f;

      else

        __err |= ios_base::failbit;

      setlocale(LC_ALL, __old);

      free(__old);

    }

  template<>

    void

    __convert_to_v(const char* __s, double& __v, ios_base::iostate& __err,

                   const __c_locale&)

    {

      // Assumes __s formatted for "C" locale.

      errno = 0;

      char* __old = strdup(setlocale(LC_ALL, NULL));

      setlocale(LC_ALL, "C");

      char* __sanity;

      double __d = strtod(__s, &__sanity);

      if (__sanity != __s && errno != ERANGE)

        __v = __d;

      else

        __err |= ios_base::failbit;

      setlocale(LC_ALL, __old);

      free(__old);

    }

  template<>

    void

    __convert_to_v(const char* __s, long double& __v,

                   ios_base::iostate& __err, const __c_locale&)

    {

      // Assumes __s formatted for "C" locale.

      errno = 0;

      char* __old = strdup(setlocale(LC_ALL, NULL));

      setlocale(LC_ALL, "C");

#if defined(_GLIBCXX_HAVE_STRTOLD)

      char* __sanity;

      long double __ld = strtold(__s, &__sanity);

      if (__sanity != __s && errno != ERANGE)

        __v = __ld;

#else

      typedef char_traits<char>::int_type int_type;

      long double __ld;

      int __p = sscanf(__s, "%Lf", &__ld);

      if (__p && static_cast<int_type>(__p) != char_traits<char>::eof()

          && errno != ERANGE)

        __v = __ld;

#endif

      else

        __err |= ios_base::failbit;

      setlocale(LC_ALL, __old);

      free(__old);

    }

  void

  locale::facet::_S_create_c_locale(__c_locale& __cloc, const char* __s,

                                    __c_locale)

  {

    // Currently, the generic model only supports the "C" locale.

    // See http://gcc.gnu.org/ml/libstdc++/2003-02/msg00345.html

    __cloc = NULL;

    if (strcmp(__s, "C"))

      __throw_runtime_error(__N("locale::facet::_S_create_c_locale "

                            "name not valid"));

  }

  void

  locale::facet::_S_destroy_c_locale(__c_locale& __cloc)

  { __cloc = NULL; }

  __c_locale

  locale::facet::_S_clone_c_locale(__c_locale&)

  { return __c_locale(); }

} // namespace std

namespace __gnu_cxx

{

  const char* const category_names[6 + _GLIBCXX_NUM_CATEGORIES] =

    {

      "LC_CTYPE",

      "LC_NUMERIC",

      "LC_TIME",

      "LC_COLLATE",

      "LC_MONETARY",

      "LC_MESSAGES"

    };

}

namespace std

{

  const char* const* const locale::_S_categories = __gnu_cxx::category_names;

}  // namespace std