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// Stream buffer classes -*- C++ -*-

// Copyright (C) 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: 27.5  Stream buffers

//

#include <streambuf>

namespace std

{

  template<>

    streamsize

    __copy_streambufs(basic_streambuf<char>* __sbin,

                      basic_streambuf<char>* __sbout)

    {

      typedef basic_streambuf<char>::traits_type traits_type;

      streamsize __ret = 0;

      traits_type::int_type __c = __sbin->sgetc();

      while (!traits_type::eq_int_type(__c, traits_type::eof()))

        {

          const streamsize __n = __sbin->egptr() - __sbin->gptr();

          if (__n > 1)

            {

              const streamsize __wrote = __sbout->sputn(__sbin->gptr(), __n);

              __sbin->gbump(__wrote);

              __ret += __wrote;

              if (__wrote < __n)

                break;

              __c = __sbin->underflow();

            }

          else

            {

              __c = __sbout->sputc(traits_type::to_char_type(__c));

              if (traits_type::eq_int_type(__c, traits_type::eof()))

                break;

              ++__ret;

              __c = __sbin->snextc();

            }

        }

      return __ret;

    }

#ifdef _GLIBCXX_USE_WCHAR_T

  template<>

    streamsize

    __copy_streambufs(basic_streambuf<wchar_t>* __sbin,

                      basic_streambuf<wchar_t>* __sbout)

    {

      typedef basic_streambuf<wchar_t>::traits_type traits_type;

      streamsize __ret = 0;

      traits_type::int_type __c = __sbin->sgetc();

      while (!traits_type::eq_int_type(__c, traits_type::eof()))

        {

          const streamsize __n = __sbin->egptr() - __sbin->gptr();

          if (__n > 1)

            {

              const streamsize __wrote = __sbout->sputn(__sbin->gptr(), __n);

              __sbin->gbump(__wrote);

              __ret += __wrote;

              if (__wrote < __n)

                break;

              __c = __sbin->underflow();

            }

          else

            {

              __c = __sbout->sputc(traits_type::to_char_type(__c));

              if (traits_type::eq_int_type(__c, traits_type::eof()))

                break;

              ++__ret;

              __c = __sbin->snextc();

            }

        }

      return __ret;

    }

#endif

} // namespace std