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https://github.com/ClickHouse/ClickHouse.git
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83 lines
2.0 KiB
C++
83 lines
2.0 KiB
C++
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//
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// UTF32Encoding.h
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//
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// Library: Foundation
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// Package: Text
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// Module: UTF32Encoding
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//
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// Definition of the UTF32Encoding 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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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_UTF32Encoding_INCLUDED
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#define Foundation_UTF32Encoding_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 UTF32Encoding: public TextEncoding
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/// UTF-32 text encoding, as defined in RFC 2781.
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///
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/// When converting from UTF-32 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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{
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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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UTF32Encoding(ByteOrderType byteOrder = NATIVE_BYTE_ORDER);
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/// Creates and initializes the encoding for the given byte order.
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UTF32Encoding(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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~UTF32Encoding();
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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_UTF32Encoding_INCLUDED
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