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111 lines
2.6 KiB
C++
111 lines
2.6 KiB
C++
//
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// Base64Decoder.h
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//
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// Library: Foundation
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// Package: Streams
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// Module: Base64
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//
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// Definition of class Base64Decoder.
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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_Base64Decoder_INCLUDED
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#define Foundation_Base64Decoder_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 Base64DecoderBuf: public UnbufferedStreamBuf
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/// This streambuf base64-decodes all data read
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/// from the istream connected to it.
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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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Base64DecoderBuf(std::istream& istr, int options = 0);
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~Base64DecoderBuf();
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private:
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int readFromDevice();
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int readOne();
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int _options;
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unsigned char _group[3];
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int _groupLength;
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int _groupIndex;
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std::streambuf& _buf;
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const unsigned char* _pInEncoding;
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static unsigned char IN_ENCODING[256];
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static bool IN_ENCODING_INIT;
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static unsigned char IN_ENCODING_URL[256];
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static bool IN_ENCODING_URL_INIT;
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private:
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Base64DecoderBuf(const Base64DecoderBuf&);
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Base64DecoderBuf& operator = (const Base64DecoderBuf&);
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};
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class Foundation_API Base64DecoderIOS: public virtual std::ios
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/// The base class for Base64Decoder.
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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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Base64DecoderIOS(std::istream& istr, int options = 0);
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~Base64DecoderIOS();
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Base64DecoderBuf* rdbuf();
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protected:
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Base64DecoderBuf _buf;
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private:
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Base64DecoderIOS(const Base64DecoderIOS&);
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Base64DecoderIOS& operator = (const Base64DecoderIOS&);
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};
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class Foundation_API Base64Decoder: public Base64DecoderIOS, public std::istream
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/// This istream base64-decodes all data
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/// read from the istream connected to it.
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///
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/// The class implements RFC 4648 - https://tools.ietf.org/html/rfc4648
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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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Base64Decoder(std::istream& istr, int options = 0);
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~Base64Decoder();
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private:
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Base64Decoder(const Base64Decoder&);
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Base64Decoder& operator = (const Base64Decoder&);
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};
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} // namespace Poco
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#endif // Foundation_Base64Decoder_INCLUDED
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