Edit File: streambuf.tcc
// Stream buffer classes -*- C++ -*- // Copyright (C) 1997-2018 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file bits/streambuf.tcc * This is an internal header file, included by other library headers. * Do not attempt to use it directly. @headername{streambuf} */ // // ISO C++ 14882: 27.5 Stream buffers // #ifndef _STREAMBUF_TCC #define _STREAMBUF_TCC 1 #pragma GCC system_header namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _CharT, typename _Traits> streamsize basic_streambuf<_CharT, _Traits>:: xsgetn(char_type* __s, streamsize __n) { streamsize __ret = 0; while (__ret < __n) { const streamsize __buf_len = this->egptr() - this->gptr(); if (__buf_len) { const streamsize __remaining = __n - __ret; const streamsize __len = std::min(__buf_len, __remaining); traits_type::copy(__s, this->gptr(), __len); __ret += __len; __s += __len; this->__safe_gbump(__len); } if (__ret < __n) { const int_type __c = this->uflow(); if (!traits_type::eq_int_type(__c, traits_type::eof())) { traits_type::assign(*__s++, traits_type::to_char_type(__c)); ++__ret; } else break; } } return __ret; } template<typename _CharT, typename _Traits> streamsize basic_streambuf<_CharT, _Traits>:: xsputn(const char_type* __s, streamsize __n) { streamsize __ret = 0; while (__ret < __n) { const streamsize __buf_len = this->epptr() - this->pptr(); if (__buf_len) { const streamsize __remaining = __n - __ret; const streamsize __len = std::min(__buf_len, __remaining); traits_type::copy(this->pptr(), __s, __len); __ret += __len; __s += __len; this->__safe_pbump(__len); } if (__ret < __n) { int_type __c = this->overflow(traits_type::to_int_type(*__s)); if (!traits_type::eq_int_type(__c, traits_type::eof())) { ++__ret; ++__s; } else break; } } return __ret; } // Conceivably, this could be used to implement buffer-to-buffer // copies, if this was ever desired in an un-ambiguous way by the // standard. template<typename _CharT, typename _Traits> streamsize __copy_streambufs_eof(basic_streambuf<_CharT, _Traits>* __sbin, basic_streambuf<_CharT, _Traits>* __sbout, bool& __ineof) { streamsize __ret = 0; __ineof = true; typename _Traits::int_type __c = __sbin->sgetc(); while (!_Traits::eq_int_type(__c, _Traits::eof())) { __c = __sbout->sputc(_Traits::to_char_type(__c)); if (_Traits::eq_int_type(__c, _Traits::eof())) { __ineof = false; break; } ++__ret; __c = __sbin->snextc(); } return __ret; } template<typename _CharT, typename _Traits> inline streamsize __copy_streambufs(basic_streambuf<_CharT, _Traits>* __sbin, basic_streambuf<_CharT, _Traits>* __sbout) { bool __ineof; return __copy_streambufs_eof(__sbin, __sbout, __ineof); } // Inhibit implicit instantiations for required instantiations, // which are defined via explicit instantiations elsewhere. #if _GLIBCXX_EXTERN_TEMPLATE extern template class basic_streambuf<char>; extern template streamsize __copy_streambufs(basic_streambuf<char>*, basic_streambuf<char>*); extern template streamsize __copy_streambufs_eof(basic_streambuf<char>*, basic_streambuf<char>*, bool&); #ifdef _GLIBCXX_USE_WCHAR_T extern template class basic_streambuf<wchar_t>; extern template streamsize __copy_streambufs(basic_streambuf<wchar_t>*, basic_streambuf<wchar_t>*); extern template streamsize __copy_streambufs_eof(basic_streambuf<wchar_t>*, basic_streambuf<wchar_t>*, bool&); #endif #endif _GLIBCXX_END_NAMESPACE_VERSION } // namespace std #endif
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