streamcopier.cpp

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// StreamCopier.cpp
//
// $Id: //poco/Main/Foundation/src/StreamCopier.cpp#5 $
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#include "Foundation/StreamCopier.h"


Foundation_BEGIN


class CopyBuffer
{
public:
	CopyBuffer(unsigned size)
	{
		_pBuffer = new char[size];
	}
	~CopyBuffer()
	{
		delete [] _pBuffer;
	}
	char* get() const
	{
		return _pBuffer;
	}

private:
	char* _pBuffer;
};


std::streamsize StreamCopier::copyStream(std::istream& istr, std::ostream& ostr, unsigned bufferSize)
{
	poco_assert (bufferSize > 0);

	CopyBuffer buffer(bufferSize);
	std::streamsize len = 0;
	istr.read(buffer.get(), bufferSize);
	std::streamsize n = istr.gcount();
	while (n > 0)
	{
		len += n;
		ostr.write(buffer.get(), n);
		if (istr && ostr)
		{
			istr.read(buffer.get(), n);
			n = istr.gcount();
		}
		else n = 0;
	}
	return len;
}


std::streamsize StreamCopier::copyStreamUnbuffered(std::istream& istr, std::ostream& ostr)
{
    char c;
    std::streamsize len = 0;
    istr.get(c);
    while (istr && ostr)
    {
        ++len;
        ostr.put(c);
        istr.get(c);
    }
    return len;
}


Foundation_END