utf16encoding.h

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

//
// UTF16Encoding.h
//
// $Id: //poco/Main/Foundation/include/Foundation/UTF16Encoding.h#5 $
//
// Definition of the UTF16Encoding class.
//
// 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.
//


#ifndef Foundation_UTF16Encoding_INCLUDED
#define Foundation_UTF16Encoding_INCLUDED


#ifndef Foundation_Foundation_INCLUDED
#include "Foundation/Foundation.h"
#endif
#ifndef Foundation_TextEncoding_INCLUDED
#include "Foundation/TextEncoding.h"
#endif


Foundation_BEGIN


class Foundation_API UTF16Encoding: public TextEncoding
	/// UTF-16 text encoding, as defined in RFC 2781.
	///
	/// When converting from UTF-16 to Unicode, surrogates are
	/// reported as they are - in other words, surrogate pairs
	/// are not combined into one Unicode character. 
	/// When converting from Unicode to UTF-16, however, characters
	/// outside the 16-bit range are converted into a low and
	/// high surrogate.
{
public:
	enum ByteOrderType
	{
		BIG_ENDIAN_BYTE_ORDER,
		LITTLE_ENDIAN_BYTE_ORDER,
		NATIVE_BYTE_ORDER
	};
	
	UTF16Encoding(ByteOrderType byteOrder = NATIVE_BYTE_ORDER);
		/// Creates and initializes the encoding for the given byte order.
		
	UTF16Encoding(int byteOrderMark);
		/// Creates and initializes the encoding for the byte-order
		/// indicated by the given byte-order mark, which is the Unicode
		/// character 0xFEFF.
		
	~UTF16Encoding();
	
	ByteOrderType getByteOrder() const;
		/// Returns the byte-order currently in use.
		
	void setByteOrder(ByteOrderType byteOrder);
		/// Sets the byte order.
		
	void setByteOrder(int byteOrderMark);
		/// Sets the byte order according to the given
		/// byte order mark, which is the Unicode
		/// character 0xFEFF.
	
	const CharacterMap& characterMap() const;
	int convert(const unsigned char* bytes) const;
	int convert(int ch, unsigned char* bytes, int length) const;
	
private:
	bool _flipBytes;
	static const CharacterMap _charMap;
};


Foundation_END


#endif // Foundation_UTF16Encoding_INCLUDED