1 // Stream buffer classes -*- C++ -*-
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4 // 2006, 2007, 2008, 2009, 2010, 2011 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
26 /** @file bits/streambuf.tcc
27 * This is an internal header file, included by other library headers.
28 * Do not attempt to use it directly. @headername{streambuf}
32 // ISO C++ 14882: 27.5 Stream buffers
35 #ifndef _STREAMBUF_TCC
36 #define _STREAMBUF_TCC 1
38 #pragma GCC system_header
40 namespace std _GLIBCXX_VISIBILITY(default)
42 _GLIBCXX_BEGIN_NAMESPACE_VERSION
44 template<typename _CharT, typename _Traits>
46 basic_streambuf<_CharT, _Traits>::
47 xsgetn(char_type* __s, streamsize __n)
52 const streamsize __buf_len = this->egptr() - this->gptr();
55 const streamsize __remaining = __n - __ret;
56 const streamsize __len = std::min(__buf_len, __remaining);
57 traits_type::copy(__s, this->gptr(), __len);
60 this->__safe_gbump(__len);
65 const int_type __c = this->uflow();
66 if (!traits_type::eq_int_type(__c, traits_type::eof()))
68 traits_type::assign(*__s++, traits_type::to_char_type(__c));
78 template<typename _CharT, typename _Traits>
80 basic_streambuf<_CharT, _Traits>::
81 xsputn(const char_type* __s, streamsize __n)
86 const streamsize __buf_len = this->epptr() - this->pptr();
89 const streamsize __remaining = __n - __ret;
90 const streamsize __len = std::min(__buf_len, __remaining);
91 traits_type::copy(this->pptr(), __s, __len);
94 this->__safe_pbump(__len);
99 int_type __c = this->overflow(traits_type::to_int_type(*__s));
100 if (!traits_type::eq_int_type(__c, traits_type::eof()))
112 // Conceivably, this could be used to implement buffer-to-buffer
113 // copies, if this was ever desired in an un-ambiguous way by the
115 template<typename _CharT, typename _Traits>
117 __copy_streambufs_eof(basic_streambuf<_CharT, _Traits>* __sbin,
118 basic_streambuf<_CharT, _Traits>* __sbout,
121 streamsize __ret = 0;
123 typename _Traits::int_type __c = __sbin->sgetc();
124 while (!_Traits::eq_int_type(__c, _Traits::eof()))
126 __c = __sbout->sputc(_Traits::to_char_type(__c));
127 if (_Traits::eq_int_type(__c, _Traits::eof()))
133 __c = __sbin->snextc();
138 template<typename _CharT, typename _Traits>
140 __copy_streambufs(basic_streambuf<_CharT, _Traits>* __sbin,
141 basic_streambuf<_CharT, _Traits>* __sbout)
144 return __copy_streambufs_eof(__sbin, __sbout, __ineof);
147 // Inhibit implicit instantiations for required instantiations,
148 // which are defined via explicit instantiations elsewhere.
149 #if _GLIBCXX_EXTERN_TEMPLATE
150 extern template class basic_streambuf<char>;
153 __copy_streambufs(basic_streambuf<char>*,
154 basic_streambuf<char>*);
157 __copy_streambufs_eof(basic_streambuf<char>*,
158 basic_streambuf<char>*, bool&);
160 #ifdef _GLIBCXX_USE_WCHAR_T
161 extern template class basic_streambuf<wchar_t>;
164 __copy_streambufs(basic_streambuf<wchar_t>*,
165 basic_streambuf<wchar_t>*);
168 __copy_streambufs_eof(basic_streambuf<wchar_t>*,
169 basic_streambuf<wchar_t>*, bool&);
173 _GLIBCXX_END_NAMESPACE_VERSION