97 строки
2.5 KiB
C++
97 строки
2.5 KiB
C++
//
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// HexBinaryDecoder.h
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//
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// $Id: //poco/1.4/Foundation/include/Poco/HexBinaryDecoder.h#2 $
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//
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// Library: Foundation
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// Package: Streams
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// Module: HexBinary
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//
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// Definition of the HexBinaryDecoder class.
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//
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// Copyright (c) 2004-2006, 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_HexBinaryDecoder_INCLUDED
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#define Foundation_HexBinaryDecoder_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/UnbufferedStreamBuf.h"
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#include <istream>
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namespace Poco {
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class Foundation_API HexBinaryDecoderBuf: public UnbufferedStreamBuf
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/// This streambuf decodes all hexBinary-encoded data read
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/// from the istream connected to it.
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/// In hexBinary encoding, each binary octet is encoded as a character tuple,
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/// consisting of two hexadecimal digits ([0-9a-fA-F]) representing the octet code.
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/// See also: XML Schema Part 2: Datatypes (http://www.w3.org/TR/xmlschema-2/),
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/// section 3.2.15.
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///
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/// Note: For performance reasons, the characters
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/// are read directly from the given istream's
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/// underlying streambuf, so the state
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/// of the istream will not reflect that of
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/// its streambuf.
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{
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public:
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HexBinaryDecoderBuf(std::istream& istr);
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~HexBinaryDecoderBuf();
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private:
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int readFromDevice();
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int readOne();
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std::streambuf& _buf;
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};
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class Foundation_API HexBinaryDecoderIOS: public virtual std::ios
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/// The base class for HexBinaryDecoder.
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///
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/// This class is needed to ensure the correct initialization
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/// order of the stream buffer and base classes.
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{
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public:
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HexBinaryDecoderIOS(std::istream& istr);
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~HexBinaryDecoderIOS();
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HexBinaryDecoderBuf* rdbuf();
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protected:
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HexBinaryDecoderBuf _buf;
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};
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class Foundation_API HexBinaryDecoder: public HexBinaryDecoderIOS, public std::istream
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/// This istream decodes all hexBinary-encoded data read
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/// from the istream connected to it.
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/// In hexBinary encoding, each binary octet is encoded as a character tuple,
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/// consisting of two hexadecimal digits ([0-9a-fA-F]) representing the octet code.
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/// See also: XML Schema Part 2: Datatypes (http://www.w3.org/TR/xmlschema-2/),
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/// section 3.2.15.
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///
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/// Note: For performance reasons, the characters
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/// are read directly from the given istream's
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/// underlying streambuf, so the state
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/// of the istream will not reflect that of
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/// its streambuf.
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{
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public:
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HexBinaryDecoder(std::istream& istr);
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~HexBinaryDecoder();
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};
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} // namespace Poco
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#endif // Foundation_HexBinaryDecoder_INCLUDED
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