libstdc++-v3/src/streambuf.cc

   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