1 // Stream buffer classes -*- C++ -*-
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
4 // Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 2, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING. If not, write to the Free
19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
22 // As a special exception, you may use this file as part of a free software
23 // library without restriction. Specifically, if other files instantiate
24 // templates or use macros or inline functions from this file, or you compile
25 // this file and link it with other files to produce an executable, this
26 // file does not by itself cause the resulting executable to be covered by
27 // the GNU General Public License. This exception does not however
28 // invalidate any other reasons why the executable file might be covered by
29 // the GNU General Public License.
32 // ISO C++ 14882: 27.5 Stream buffers
35 #ifndef _STREAMBUF_TCC
36 #define _STREAMBUF_TCC 1
38 #pragma GCC system_header
42 template<typename _CharT, typename _Traits>
44 basic_streambuf<_CharT, _Traits>::
45 xsgetn(char_type* __s, streamsize __n)
50 const size_t __buf_len = this->egptr() - this->gptr();
53 const size_t __remaining = __n - __ret;
54 const size_t __len = std::min(__buf_len, __remaining);
55 traits_type::copy(__s, this->gptr(), __len);
63 const int_type __c = this->uflow();
64 if (!traits_type::eq_int_type(__c, traits_type::eof()))
66 traits_type::assign(*__s++, traits_type::to_char_type(__c));
76 template<typename _CharT, typename _Traits>
78 basic_streambuf<_CharT, _Traits>::
79 xsputn(const char_type* __s, streamsize __n)
84 const size_t __buf_len = this->epptr() - this->pptr();
87 const size_t __remaining = __n - __ret;
88 const size_t __len = std::min(__buf_len, __remaining);
89 traits_type::copy(this->pptr(), __s, __len);
97 int_type __c = this->overflow(traits_type::to_int_type(*__s));
98 if (!traits_type::eq_int_type(__c, traits_type::eof()))
110 // Conceivably, this could be used to implement buffer-to-buffer
111 // copies, if this was ever desired in an un-ambiguous way by the
112 // standard. If so, then checks for __ios being zero would be
114 template<typename _CharT, typename _Traits>
116 __copy_streambufs(basic_streambuf<_CharT, _Traits>* __sbin,
117 basic_streambuf<_CharT, _Traits>* __sbout)
119 streamsize __ret = 0;
120 typename _Traits::int_type __c = __sbin->sgetc();
121 while (!_Traits::eq_int_type(__c, _Traits::eof()))
123 const size_t __n = __sbin->egptr() - __sbin->gptr();
126 const size_t __wrote = __sbout->sputn(__sbin->gptr(), __n);
127 __sbin->gbump(__wrote);
131 __c = __sbin->underflow();
135 __c = __sbout->sputc(_Traits::to_char_type(__c));
136 if (_Traits::eq_int_type(__c, _Traits::eof()))
139 __c = __sbin->snextc();
145 // Inhibit implicit instantiations for required instantiations,
146 // which are defined via explicit instantiations elsewhere.
147 // NB: This syntax is a GNU extension.
148 #if _GLIBCXX_EXTERN_TEMPLATE
149 extern template class basic_streambuf<char>;
152 __copy_streambufs(basic_streambuf<char>*,
153 basic_streambuf<char>*);
155 #ifdef _GLIBCXX_USE_WCHAR_T
156 extern template class basic_streambuf<wchar_t>;
159 __copy_streambufs(basic_streambuf<wchar_t>*,
160 basic_streambuf<wchar_t>*);