/usr/include/cxxtools/iostream.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) 2005-2008 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_IOStream_h
#define cxxtools_System_IOStream_h
#include <cxxtools/api.h>
#include <cxxtools/streambuffer.h>
#include <iostream>
#include <algorithm>
namespace cxxtools {
//! @brief An istream with peeking capability.
template <typename CharT>
class BasicIStream : public std::basic_istream<CharT>
{
public:
explicit BasicIStream(BasicStreamBuffer<CharT>* buffer = 0)
: std::basic_istream<CharT>( buffer ),
_buffer(buffer)
{ }
~BasicIStream()
{ }
//! @brief Access to the underlying buffer.
BasicStreamBuffer<CharT>* attachedBuffer()
{ return _buffer; }
BasicStreamBuffer<CharT>* attachBuffer(BasicStreamBuffer<CharT>* buffer)
{
BasicStreamBuffer<CharT>* tmp = _buffer;
_buffer = buffer;
this->rdbuf(buffer);
return tmp;
}
//! @brief Peeks bytes in the stream buffer.
/**
The number of bytes that can be peeked depends on the current
stream buffer get area and maybe less than requested,
similar to istream::readsome().
*/
std::streamsize peeksome(CharT* buffer, std::streamsize n)
{
if(this->rdbuf() == _buffer)
return _buffer->speekn(buffer, n);
if(n > 0)
{
buffer[0] = this->peek();
return 1;
}
return 0;
}
private:
BasicStreamBuffer<CharT>* _buffer;
};
//! @brief An ostream with peeking capability.
template <typename CharT>
class BasicOStream : public std::basic_ostream<CharT>
{
public:
explicit BasicOStream(BasicStreamBuffer<CharT>* buffer = 0)
: std::basic_ostream<CharT>( buffer ),
_buffer(buffer)
{ }
~BasicOStream()
{}
//! @brief Access to the underlying buffer.
BasicStreamBuffer<CharT>* attachedBuffer()
{ return _buffer; }
BasicStreamBuffer<CharT>* attachBuffer(BasicStreamBuffer<CharT>* buffer)
{
BasicStreamBuffer<CharT>* tmp = _buffer;
_buffer = buffer;
this->rdbuf(buffer);
return tmp;
}
std::streamsize writesome(CharT* buffer, std::streamsize n)
{
std::basic_streambuf<CharT>* current = std::basic_ios<CharT>::rdbuf();
if(current != _buffer)
return 0;
std::streamsize avail = _buffer->out_avail();
if(avail == 0)
{
return 0;
}
n = std::min(avail, n);
return _buffer->sputn(buffer, n);
}
private:
BasicStreamBuffer<CharT>* _buffer;
};
//! @brief An iostream with peeking capability.
template <typename CharT>
class BasicIOStream : public std::basic_iostream<CharT>
{
public:
explicit BasicIOStream(BasicStreamBuffer<CharT>* buffer = 0)
: std::basic_iostream<CharT>( buffer ),
_buffer(buffer)
{ }
~BasicIOStream()
{ }
//! @brief Access to the underlying buffer.
BasicStreamBuffer<CharT>* attachedBuffer()
{ return _buffer; }
BasicStreamBuffer<CharT>* attachBuffer(BasicStreamBuffer<CharT>* buffer)
{
BasicStreamBuffer<CharT>* tmp = _buffer;
_buffer = buffer;
this->rdbuf(buffer);
return tmp;
}
//! @brief Peeks bytes in the stream buffer.
/**
The number of bytes that can be peeked depends on the current
stream buffer get area and maybe less than requested,
similar to istream::readsome().
*/
std::streamsize peeksome(CharT* buffer, std::streamsize n)
{
if(this->rdbuf() == _buffer)
return _buffer->speekn(buffer, n);
if(n > 0)
{
buffer[0] = this->peek();
return 1;
}
return 0;
}
std::streamsize writesome(CharT* buffer, std::streamsize n)
{
std::basic_streambuf<CharT>* current = std::basic_ios<CharT>::rdbuf();
if(current != _buffer)
return 0;
std::streamsize avail = _buffer->out_avail();
if(avail == 0)
{
return 0;
}
n = std::min(avail, n);
return _buffer->sputn(buffer, n);
}
private:
BasicStreamBuffer<CharT>* _buffer;
};
class CXXTOOLS_API IStream : public BasicIStream<char>
{
public:
explicit IStream(size_t bufferSize = 8192, bool extend = false);
~IStream();
explicit IStream(IODevice& device, size_t bufferSize = 8192, bool extend = false);
StreamBuffer& buffer();
IODevice* attachDevice(IODevice& device);
IODevice* attachedDevice();
private:
StreamBuffer _buffer;
};
class CXXTOOLS_API OStream : public BasicOStream<char>
{
public:
explicit OStream(size_t bufferSize = 8192, bool extend = false);
explicit OStream(IODevice& device, size_t bufferSize = 8192, bool extend = false);
~OStream();
StreamBuffer& buffer();
IODevice* attachDevice(IODevice& device);
IODevice* attachedDevice();
private:
StreamBuffer _buffer;
};
class CXXTOOLS_API IOStream : public BasicIOStream<char>
{
public:
explicit IOStream(size_t bufferSize = 8192, bool extend = false);
explicit IOStream(IODevice& device, size_t bufferSize = 8192, bool extend = false);
~IOStream();
StreamBuffer& buffer();
IODevice* attachDevice(IODevice& device);
IODevice* attachedDevice();
private:
StreamBuffer _buffer;
};
} // !namespace cxxtools
#endif
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