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//
// Base64Decoder.h
//
// Library: Foundation
// Package: Streams
// Module: Base64
//
// Definition of class Base64Decoder.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Foundation_Base64Decoder_INCLUDED
#define Foundation_Base64Decoder_INCLUDED
#include "Poco/Foundation.h"
#include "Poco/UnbufferedStreamBuf.h"
#include <istream>
namespace Poco {
class Foundation_API Base64DecoderBuf: public UnbufferedStreamBuf
/// This streambuf base64-decodes all data read
/// from the istream connected to it.
///
/// 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:
Base64DecoderBuf(std::istream& istr, int options = 0);
~Base64DecoderBuf();
private:
int readFromDevice();
int readOne();
int _options;
unsigned char _group[3];
int _groupLength;
int _groupIndex;
std::streambuf& _buf;
const unsigned char* _pInEncoding;
static unsigned char IN_ENCODING[256];
static bool IN_ENCODING_INIT;
static unsigned char IN_ENCODING_URL[256];
static bool IN_ENCODING_URL_INIT;
private:
Base64DecoderBuf(const Base64DecoderBuf&);
Base64DecoderBuf& operator = (const Base64DecoderBuf&);
};
class Foundation_API Base64DecoderIOS: public virtual std::ios
/// The base class for Base64Decoder.
///
/// This class is needed to ensure the correct initialization
/// order of the stream buffer and base classes.
{
public:
Base64DecoderIOS(std::istream& istr, int options = 0);
~Base64DecoderIOS();
Base64DecoderBuf* rdbuf();
protected:
Base64DecoderBuf _buf;
private:
Base64DecoderIOS(const Base64DecoderIOS&);
Base64DecoderIOS& operator = (const Base64DecoderIOS&);
};
class Foundation_API Base64Decoder: public Base64DecoderIOS, public std::istream
/// This istream base64-decodes all data
/// read from the istream connected to it.
///
/// 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:
Base64Decoder(std::istream& istr, int options = 0);
~Base64Decoder();
private:
Base64Decoder(const Base64Decoder&);
Base64Decoder& operator = (const Base64Decoder&);
};
} // namespace Poco
#endif // Foundation_Base64Decoder_INCLUDED
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