base64encoder.cpp

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

//
// Base64Encoder.cpp
//
// $Id: //poco/Main/Foundation/src/Base64Encoder.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/Base64Encoder.h"


Foundation_BEGIN


const unsigned char Base64EncoderBuf::OUT_ENCODING[64] =
{
	'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
	'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
	'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
	'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
	'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
	'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
	'w', 'x', 'y', 'z', '0', '1', '2', '3', 
	'4', '5', '6', '7', '8', '9', '+', '/'
};


Base64EncoderBuf::Base64EncoderBuf(std::ostream& ostr): 
	_groupLength(0),
	_pos(0),
	_lineLength(72),
	_ostr(ostr)
{
}


Base64EncoderBuf::~Base64EncoderBuf()
{
	close();
}


void Base64EncoderBuf::setLineLength(int lineLength)
{
	poco_assert (lineLength > 0);
	
	_lineLength = lineLength;
}


int Base64EncoderBuf::getLineLength() const
{
	return _lineLength;
}


int Base64EncoderBuf::writeToDevice(char c)
{
	_group[_groupLength++] = (unsigned char) c;
	if (_groupLength == 3)
	{
		unsigned char idx;
		idx = _group[0] >> 2;
		_ostr.put(OUT_ENCODING[idx]);
		idx = ((_group[0] & 0x03) << 4) | (_group[1] >> 4);
		_ostr.put(OUT_ENCODING[idx]);
		idx = ((_group[1] & 0x0F) << 2) | (_group[2] >> 6);
		_ostr.put(OUT_ENCODING[idx]);
		idx = _group[2] & 0x3F;
		_ostr.put(OUT_ENCODING[idx]);
		_pos += 4;
		if (_pos >= _lineLength) 
		{
			_ostr << std::endl;
			_pos = 0;
		}
		_groupLength = 0;
	}
	return _ostr ? c : -1;
}


int Base64EncoderBuf::close()
{
	sync();
	if (_groupLength == 1)
	{
		_group[1] = 0;
		unsigned char idx;
		idx = _group[0] >> 2;
		_ostr.put(OUT_ENCODING[idx]);
		idx = ((_group[0] & 0x03) << 4) | (_group[1] >> 4);
		_ostr.put(OUT_ENCODING[idx]);
		_ostr << "==";
	}
	else if (_groupLength == 2)
	{
		_group[2] = 0;
		unsigned char idx;
		idx = _group[0] >> 2;
		_ostr.put(OUT_ENCODING[idx]);
		idx = ((_group[0] & 0x03) << 4) | (_group[1] >> 4);
		_ostr.put(OUT_ENCODING[idx]);
		idx = ((_group[1] & 0x0F) << 2) | (_group[2] >> 6);
		_ostr.put(OUT_ENCODING[idx]);
		_ostr.put('=');
	}
	_ostr.flush();
	_groupLength = 0;
	return _ostr ? 0 : -1;
}


Base64EncoderIOS::Base64EncoderIOS(std::ostream& ostr): _buf(ostr)
{
	init(&_buf);
}


Base64EncoderIOS::~Base64EncoderIOS()
{
}


int Base64EncoderIOS::close()
{
	return _buf.close();
}


Base64EncoderBuf* Base64EncoderIOS::rdbuf()
{
	return &_buf;
}


Base64Encoder::Base64Encoder(std::ostream& ostr): Base64EncoderIOS(ostr), std::ostream(&_buf)
{
}


Base64Encoder::~Base64Encoder()
{
}


Foundation_END