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 119