/usr/include/cxxtools/streambuffer.h is in libcxxtools-dev 2.2.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2005 Marc Boris Duerner
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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 Library
* General Public License.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef cxxtools_System_StreamBuffer_h
#define cxxtools_System_StreamBuffer_h
#include <ios>
#include <streambuf>
#include <cxxtools/api.h>
#include <cxxtools/iodevice.h>
namespace cxxtools {
template <typename CharT>
class BasicStreamBuffer : public std::basic_streambuf<CharT>
{
public:
std::streamsize speekn(CharT* buffer, std::streamsize size)
{ return this->xspeekn(buffer, size); }
std::streamsize out_avail()
{
if( this->pptr() )
return this->pptr() - this->pbase();
return this->showfull();
}
protected:
virtual std::streamsize xspeekn(CharT* buffer, std::streamsize size)
{
if(size == 0)
return 0;
buffer[0] = this->sgetc();
return 1;
}
virtual std::streamsize showfull()
{ return 0; }
};
//! @brief A stream buffer for IODevices with linear buffer area
class CXXTOOLS_API StreamBuffer : public BasicStreamBuffer<char>
, public Connectable
{
public:
//! @brief Constructs an IOBuffer for an IODevice
explicit StreamBuffer(IODevice& ioDevice, size_t bufferSize = 8192, bool extend = false);
//! @brief Default constructor
explicit StreamBuffer(size_t bufferSize = 8192, bool extend = false);
~StreamBuffer();
void attach(IODevice& ioDevice);
IODevice* device();
void beginRead();
void endRead();
size_t beginWrite();
size_t endWrite();
void discard();
Signal<StreamBuffer&> inputReady;
Signal<StreamBuffer&> outputReady;
protected:
virtual int sync();
virtual std::streamsize showfull();
virtual std::streamsize xspeekn(char* buffer, std::streamsize size);
virtual int_type underflow();
virtual int_type overflow(int_type ch);
virtual int_type pbackfail(int_type c);
/** @brief Alters the stream positions
*/
virtual pos_type seekoff(off_type offset, std::ios::seekdir sd, std::ios::openmode mode);
/** @brief Alters the stream positions
*/
virtual pos_type seekpos(pos_type p, std::ios::openmode mode );
private:
void onRead(IODevice& dev);
void onWrite(IODevice& dev);
private:
IODevice* _ioDevice;
size_t _ibufferSize;
char* _ibuffer;
std::size_t _obufferSize;
char* _obuffer;
const size_t _pbmax;
bool _oextend;
};
} // namespace cxxtools
#endif
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