1// Stream buffer classes -*- C++ -*- 2 3// Copyright (C) 2004, 2005 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 36namespace std 37{ 38 template<> 39 streamsize 40 __copy_streambufs(basic_streambuf<char>* __sbin, 41 basic_streambuf<char>* __sbout) 42 { 43 typedef basic_streambuf<char>::traits_type traits_type; 44 streamsize __ret = 0; 45 traits_type::int_type __c = __sbin->sgetc(); 46 while (!traits_type::eq_int_type(__c, traits_type::eof())) 47 { 48 const streamsize __n = __sbin->egptr() - __sbin->gptr(); 49 if (__n > 1) 50 { 51 const streamsize __wrote = __sbout->sputn(__sbin->gptr(), __n); 52 __sbin->gbump(__wrote); 53 __ret += __wrote; 54 if (__wrote < __n) 55 break; 56 __c = __sbin->underflow(); 57 } 58 else 59 { 60 __c = __sbout->sputc(traits_type::to_char_type(__c)); 61 if (traits_type::eq_int_type(__c, traits_type::eof())) 62 break; 63 ++__ret; 64 __c = __sbin->snextc(); 65 } 66 } 67 return __ret; 68 } 69 70#ifdef _GLIBCXX_USE_WCHAR_T 71 template<> 72 streamsize 73 __copy_streambufs(basic_streambuf<wchar_t>* __sbin, 74 basic_streambuf<wchar_t>* __sbout) 75 { 76 typedef basic_streambuf<wchar_t>::traits_type traits_type; 77 streamsize __ret = 0; 78 traits_type::int_type __c = __sbin->sgetc(); 79 while (!traits_type::eq_int_type(__c, traits_type::eof())) 80 { 81 const streamsize __n = __sbin->egptr() - __sbin->gptr(); 82 if (__n > 1) 83 { 84 const streamsize __wrote = __sbout->sputn(__sbin->gptr(), __n); 85 __sbin->gbump(__wrote); 86 __ret += __wrote; 87 if (__wrote < __n) 88 break; 89 __c = __sbin->underflow(); 90 } 91 else 92 { 93 __c = __sbout->sputc(traits_type::to_char_type(__c)); 94 if (traits_type::eq_int_type(__c, traits_type::eof())) 95 break; 96 ++__ret; 97 __c = __sbin->snextc(); 98 } 99 } 100 return __ret; 101 } 102#endif 103} // namespace std 104