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//
// HexBinaryDecoder.h
//
// Library: Foundation
// Package: Streams
// Module: HexBinary
//
// Definition of the HexBinaryDecoder class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Foundation_HexBinaryDecoder_INCLUDED
#define Foundation_HexBinaryDecoder_INCLUDED
#include "Poco/Foundation.h"
#include "Poco/UnbufferedStreamBuf.h"
#include <istream>
namespace Poco {
class Foundation_API HexBinaryDecoderBuf: public UnbufferedStreamBuf
/// This streambuf decodes all hexBinary-encoded data read
/// from the istream connected to it.
/// In hexBinary encoding, each binary octet is encoded as a character tuple,
/// consisting of two hexadecimal digits ([0-9a-fA-F]) representing the octet code.
/// See also: XML Schema Part 2: Datatypes (http://www.w3.org/TR/xmlschema-2/),
/// section 3.2.15.
///
/// Note: For performance reasons, the characters
/// are read directly from the given istream's
/// underlying streambuf, so the state
/// of the istream will not reflect that of
/// its streambuf.
{
public:
HexBinaryDecoderBuf(std::istream& istr);
~HexBinaryDecoderBuf();
private:
int readFromDevice();
int readOne();
std::streambuf& _buf;
};
class Foundation_API HexBinaryDecoderIOS: public virtual std::ios
/// The base class for HexBinaryDecoder.
///
/// This class is needed to ensure the correct initialization
/// order of the stream buffer and base classes.
{
public:
HexBinaryDecoderIOS(std::istream& istr);
~HexBinaryDecoderIOS();
HexBinaryDecoderBuf* rdbuf();
protected:
HexBinaryDecoderBuf _buf;
};
class Foundation_API HexBinaryDecoder: public HexBinaryDecoderIOS, public std::istream
/// This istream decodes all hexBinary-encoded data read
/// from the istream connected to it.
/// In hexBinary encoding, each binary octet is encoded as a character tuple,
/// consisting of two hexadecimal digits ([0-9a-fA-F]) representing the octet code.
/// See also: XML Schema Part 2: Datatypes (http://www.w3.org/TR/xmlschema-2/),
/// section 3.2.15.
///
/// Note: For performance reasons, the characters
/// are read directly from the given istream's
/// underlying streambuf, so the state
/// of the istream will not reflect that of
/// its streambuf.
{
public:
HexBinaryDecoder(std::istream& istr);
~HexBinaryDecoder();
};
} // namespace Poco
#endif // Foundation_HexBinaryDecoder_INCLUDED
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