textiterator.cpp

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

//
// TextIterator.cpp
//
// $Id: //poco/Main/Foundation/src/TextIterator.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/TextIterator.h"
#include "Foundation/TextEncoding.h"


Foundation_BEGIN


TextIterator::TextIterator():
	_pEncoding(0)
{
}


TextIterator::TextIterator(const std::string& str, const TextEncoding& encoding):
	_it(str.begin()),
	_end(str.end()),
	_pEncoding(&encoding)
{
}

TextIterator::TextIterator(const std::string::const_iterator& begin, const std::string::const_iterator& end, const TextEncoding& encoding):
	_it(begin),
	_end(end),
	_pEncoding(&encoding)
{
}


TextIterator::TextIterator(const std::string& str):
	_it(str.end()),
	_end(str.end()),
	_pEncoding(0)
{
}


TextIterator::TextIterator(const std::string::const_iterator& end):
	_it(end),
	_end(end),
	_pEncoding(0)
{
}


TextIterator::~TextIterator()
{
}


TextIterator::TextIterator(const TextIterator& it):
	_it(it._it),
	_end(it._end),
	_pEncoding(it._pEncoding)
{
}


TextIterator& TextIterator::operator = (const TextIterator& it)
{
	if (&it != this)
	{
		_it        = it._it;
		_end       = it._end;
		_pEncoding = it._pEncoding;
	}
	return *this;
}


int TextIterator::operator * () const
{
	poco_check_ptr (_pEncoding);
	poco_assert (_it != _end);
	
	unsigned char c = (unsigned char) *_it;
	int n = _pEncoding->characterMap()[c];
	if (n >= -1)
		return n;
	else
	{
		poco_assert_dbg (n >= -TextEncoding::MAX_SEQUENCE_LENGTH);
		unsigned char buffer[TextEncoding::MAX_SEQUENCE_LENGTH];
		unsigned char* p = buffer;
		std::string::const_iterator it = _it;
		while (n < 0 && it != _end) { *p++ = *it++; ++n; }
		if (n == 0)
			return _pEncoding->convert(buffer);
		else
			return -1;
	}
}

	
TextIterator& TextIterator::operator ++ ()
{
	poco_check_ptr (_pEncoding);
	poco_assert (_it != _end);
	
	unsigned char c = (unsigned char) *_it;
	int n = _pEncoding->characterMap()[c];
	if (n >= -1)
		++_it;
	else
		while (n < 0 && _it != _end) { ++_it; ++n; }

	return *this;
}


TextIterator TextIterator::operator ++ (int)
{
	TextIterator prev(*this);
	operator ++ ();
	return prev;
}


Foundation_END