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108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
//
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// UTF16Encoding.h
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//
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// $Id: //poco/svn/Foundation/include/Poco/UTF16Encoding.h#2 $
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//
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// Library: Foundation
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// Package: Text
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// Module: UTF16Encoding
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//
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// Definition of the UTF16Encoding class.
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//
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// Copyright (c) 2004-2007, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Foundation_UTF16Encoding_INCLUDED
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#define Foundation_UTF16Encoding_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/TextEncoding.h"
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namespace Poco {
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class Foundation_API UTF16Encoding: public TextEncoding
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/// UTF-16 text encoding, as defined in RFC 2781.
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///
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/// When converting from UTF-16 to Unicode, surrogates are
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/// reported as they are - in other words, surrogate pairs
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/// are not combined into one Unicode character.
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/// When converting from Unicode to UTF-16, however, characters
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/// outside the 16-bit range are converted into a low and
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/// high surrogate.
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{
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public:
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enum ByteOrderType
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{
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BIG_ENDIAN_BYTE_ORDER,
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LITTLE_ENDIAN_BYTE_ORDER,
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NATIVE_BYTE_ORDER
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};
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UTF16Encoding(ByteOrderType byteOrder = NATIVE_BYTE_ORDER);
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/// Creates and initializes the encoding for the given byte order.
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UTF16Encoding(int byteOrderMark);
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/// Creates and initializes the encoding for the byte-order
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/// indicated by the given byte-order mark, which is the Unicode
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/// character 0xFEFF.
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~UTF16Encoding();
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ByteOrderType getByteOrder() const;
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/// Returns the byte-order currently in use.
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void setByteOrder(ByteOrderType byteOrder);
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/// Sets the byte order.
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void setByteOrder(int byteOrderMark);
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/// Sets the byte order according to the given
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/// byte order mark, which is the Unicode
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/// character 0xFEFF.
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const char* canonicalName() const;
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bool isA(const std::string& encodingName) const;
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const CharacterMap& characterMap() const;
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int convert(const unsigned char* bytes) const;
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int convert(int ch, unsigned char* bytes, int length) const;
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int queryConvert(const unsigned char* bytes, int length) const;
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int sequenceLength(const unsigned char* bytes, int length) const;
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private:
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bool _flipBytes;
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static const char* _names[];
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static const CharacterMap _charMap;
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};
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} // namespace Poco
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#endif // Foundation_UTF16Encoding_INCLUDED
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