0,0 → 1,175 |
// Stream buffer classes -*- C++ -*- |
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// Copyright (C) 1997-2015 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. |
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// 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. |
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// 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. |
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// 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/>. |
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/** @file bits/streambuf.tcc |
* This is an internal header file, included by other library headers. |
* Do not attempt to use it directly. @headername{streambuf} |
*/ |
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// |
// ISO C++ 14882: 27.5 Stream buffers |
// |
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#ifndef _STREAMBUF_TCC |
#define _STREAMBUF_TCC 1 |
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#pragma GCC system_header |
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namespace std _GLIBCXX_VISIBILITY(default) |
{ |
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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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); |
} |
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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; |
} |
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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); |
} |
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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; |
} |
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// 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; |
} |
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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); |
} |
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// 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&); |
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#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 |
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_GLIBCXX_END_NAMESPACE_VERSION |
} // namespace std |
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#endif |