1  // Stream buffer classes -*- C++ -*-
  2  
  3  // Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
  4  //
  5  // This file is part of the GNU ISO C++ Library.  This library is free
  6  // software; you can redistribute it and/or modify it under the
  7  // terms of the GNU General Public License as published by the
  8  // Free Software Foundation; either version 2, or (at your option)
  9  // any later version.
 10  
 11  // This library is distributed in the hope that it will be useful,
 12  // but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  // GNU General Public License for more details.
 15  
 16  // You should have received a copy of the GNU General Public License along
 17  // with this library; see the file COPYING.  If not, write to the Free
 18  // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 19  // USA.
 20  
 21  // As a special exception, you may use this file as part of a free software
 22  // library without restriction.  Specifically, if other files instantiate
 23  // templates or use macros or inline functions from this file, or you compile
 24  // this file and link it with other files to produce an executable, this
 25  // file does not by itself cause the resulting executable to be covered by
 26  // the GNU General Public License.  This exception does not however
 27  // invalidate any other reasons why the executable file might be covered by
 28  // the GNU General Public License.
 29  
 30  //
 31  // ISO C++ 14882: 27.5  Stream buffers
 32  //
 33  
 34  #include <streambuf>
 35  
 36  _GLIBCXX_BEGIN_NAMESPACE(std)
 37  
 38    template<>
 39      streamsize
 40      __copy_streambufs_eof(basic_streambuf<char>* __sbin,
 41  			  basic_streambuf<char>* __sbout, bool& __ineof)
 42      {
 43        typedef basic_streambuf<char>::traits_type traits_type;
 44        streamsize __ret = 0;
 45        __ineof = true;
 46        traits_type::int_type __c = __sbin->sgetc();
 47        while (!traits_type::eq_int_type(__c, traits_type::eof()))
 48  	{
 49  	  const streamsize __n = __sbin->egptr() - __sbin->gptr();
 50  	  if (__n > 1)
 51  	    {
 52  	      const streamsize __wrote = __sbout->sputn(__sbin->gptr(), __n);
 53  	      __sbin->gbump(__wrote);
 54  	      __ret += __wrote;
 55  	      if (__wrote < __n)
 56  		{
 57  		  __ineof = false;
 58  		  break;
 59  		}
 60  	      __c = __sbin->underflow();
 61  	    }
 62  	  else
 63  	    {
 64  	      __c = __sbout->sputc(traits_type::to_char_type(__c));
 65  	      if (traits_type::eq_int_type(__c, traits_type::eof()))
 66  		{
 67  		  __ineof = false;
 68  		  break;
 69  		}
 70  	      ++__ret;
 71  	      __c = __sbin->snextc();
 72  	    }
 73  	}
 74        return __ret;
 75      }
 76  
 77  #ifdef _GLIBCXX_USE_WCHAR_T
 78    template<>
 79      streamsize
 80      __copy_streambufs_eof(basic_streambuf<wchar_t>* __sbin,
 81  			  basic_streambuf<wchar_t>* __sbout, bool& __ineof)
 82      {
 83        typedef basic_streambuf<wchar_t>::traits_type traits_type;
 84        streamsize __ret = 0;
 85        __ineof = true;
 86        traits_type::int_type __c = __sbin->sgetc();
 87        while (!traits_type::eq_int_type(__c, traits_type::eof()))
 88  	{
 89  	  const streamsize __n = __sbin->egptr() - __sbin->gptr();
 90  	  if (__n > 1)
 91  	    {
 92  	      const streamsize __wrote = __sbout->sputn(__sbin->gptr(), __n);
 93  	      __sbin->gbump(__wrote);
 94  	      __ret += __wrote;
 95  	      if (__wrote < __n)
 96  		{
 97  		  __ineof = false;
 98  		  break;
 99  		}
100  	      __c = __sbin->underflow();
101  	    }
102  	  else
103  	    {
104  	      __c = __sbout->sputc(traits_type::to_char_type(__c));
105  	      if (traits_type::eq_int_type(__c, traits_type::eof()))
106  		{
107  		  __ineof = false;
108  		  break;
109  		}
110  	      ++__ret;
111  	      __c = __sbin->snextc();
112  	    }
113  	}
114        return __ret;
115      }
116  #endif
117  
118  _GLIBCXX_END_NAMESPACE