| // Stream buffer classes -*- C++ -*- |
| |
| // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
| // 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 2, 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. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING. If not, write to the Free |
| // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| // USA. |
| |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| |
| // |
| // ISO C++ 14882: 27.5 Stream buffers |
| // |
| |
| #ifndef _STREAMBUF_TCC |
| #define _STREAMBUF_TCC 1 |
| |
| #pragma GCC system_header |
| |
| namespace std |
| { |
| template<typename _CharT, typename _Traits> |
| streamsize |
| basic_streambuf<_CharT, _Traits>:: |
| xsgetn(char_type* __s, streamsize __n) |
| { |
| streamsize __ret = 0; |
| while (__ret < __n) |
| { |
| const size_t __buf_len = this->egptr() - this->gptr(); |
| if (__buf_len) |
| { |
| const size_t __remaining = __n - __ret; |
| const size_t __len = std::min(__buf_len, __remaining); |
| traits_type::copy(__s, this->gptr(), __len); |
| __ret += __len; |
| __s += __len; |
| this->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 size_t __buf_len = this->epptr() - this->pptr(); |
| if (__buf_len) |
| { |
| const size_t __remaining = __n - __ret; |
| const size_t __len = std::min(__buf_len, __remaining); |
| traits_type::copy(this->pptr(), __s, __len); |
| __ret += __len; |
| __s += __len; |
| this->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. If so, then checks for __ios being zero would be |
| // necessary. |
| template<typename _CharT, typename _Traits> |
| streamsize |
| __copy_streambufs(basic_streambuf<_CharT, _Traits>* __sbin, |
| basic_streambuf<_CharT, _Traits>* __sbout) |
| { |
| streamsize __ret = 0; |
| typename _Traits::int_type __c = __sbin->sgetc(); |
| while (!_Traits::eq_int_type(__c, _Traits::eof())) |
| { |
| const size_t __n = __sbin->egptr() - __sbin->gptr(); |
| if (__n > 1) |
| { |
| const size_t __wrote = __sbout->sputn(__sbin->gptr(), __n); |
| __sbin->gbump(__wrote); |
| __ret += __wrote; |
| if (__wrote < __n) |
| break; |
| __c = __sbin->underflow(); |
| } |
| else |
| { |
| __c = __sbout->sputc(_Traits::to_char_type(__c)); |
| if (_Traits::eq_int_type(__c, _Traits::eof())) |
| break; |
| ++__ret; |
| __c = __sbin->snextc(); |
| } |
| } |
| return __ret; |
| } |
| |
| // Inhibit implicit instantiations for required instantiations, |
| // which are defined via explicit instantiations elsewhere. |
| // NB: This syntax is a GNU extension. |
| #if _GLIBCXX_EXTERN_TEMPLATE |
| extern template class basic_streambuf<char>; |
| extern template |
| streamsize |
| __copy_streambufs(basic_streambuf<char>*, basic_streambuf<char>*); |
| |
| #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>*); |
| #endif |
| #endif |
| } // namespace std |
| |
| #endif |
