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// String Conversions -*- C++ -*-

// Copyright (C) 2008, 2009, 2010 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 3, 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.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.

/** @file ext/string_conversions.h

 *  This file is a GNU extension to the Standard C++ Library.

 */

#ifndef _STRING_CONVERSIONS_H

#define _STRING_CONVERSIONS_H 1

#pragma GCC system_header

#include <bits/c++config.h>

#include <ext/numeric_traits.h>

#include <bits/functexcept.h>

#include <cstdlib>

#include <cwchar>

#include <cstdio>

#include <cerrno>

namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)

{

_GLIBCXX_BEGIN_NAMESPACE_VERSION

  // Helper for all the sto* functions.

  template<typename _TRet, typename _Ret = _TRet, typename _CharT,

           typename... _Base>

    _Ret

    __stoa(_TRet (*__convf) (const _CharT*, _CharT**, _Base...),

           const char* __name, const _CharT* __str, std::size_t* __idx,

           _Base... __base)

    {

      _Ret __ret;

      _CharT* __endptr;

      errno = 0;

      const _TRet __tmp = __convf(__str, &__endptr, __base...);

      if (__endptr == __str)

        std::__throw_invalid_argument(__name);

      else if (errno == ERANGE

               || (std::__are_same<_Ret, int>::__value

                   && (__tmp < __numeric_traits<int>::__min

                       || __tmp > __numeric_traits<int>::__max)))

        std::__throw_out_of_range(__name);

      else

        __ret = __tmp;

      if (__idx)

        *__idx = __endptr - __str;

      return __ret;

    }

  // Helper for the to_string / to_wstring functions.

  template<typename _String, typename _CharT = typename _String::value_type>

    _String

    __to_xstring(int (*__convf) (_CharT*, std::size_t, const _CharT*,

                                 __builtin_va_list), std::size_t __n,

                 const _CharT* __fmt, ...)

    {

      // XXX Eventually the result will be constructed in place in

      // the C++0x string, likely with the help of internal hooks.

      _CharT* __s = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)

                                                          * __n));

      __builtin_va_list __args;

      __builtin_va_start(__args, __fmt);

      const int __len = __convf(__s, __n, __fmt, __args);

      __builtin_va_end(__args);

      return _String(__s, __s + __len);

    }

_GLIBCXX_END_NAMESPACE_VERSION

} // namespace

#endif // _STRING_CONVERSIONS_H