ClickHouse/base/poco/Net/include/Poco/Net/QuotedPrintableEncoder.h

//
// QuotedPrintableEncoder.h
//
// Library: Net
// Package: Messages
// Module:  QuotedPrintableEncoder
//
// Definition of the QuotedPrintableEncoder class.
//
// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Net_QuotedPrintableEncoder_INCLUDED
#define Net_QuotedPrintableEncoder_INCLUDED


#include <ostream>
#include "Poco/Net/Net.h"
#include "Poco/UnbufferedStreamBuf.h"


namespace Poco
{
namespace Net
{


    class Net_API QuotedPrintableEncoderBuf : public Poco::UnbufferedStreamBuf
    /// This streambuf encodes all data written
    /// to it in quoted-printable encoding (see RFC 2045)
    /// and forwards it to a connected ostream.
    {
    public:
        QuotedPrintableEncoderBuf(std::ostream & ostr);
        ~QuotedPrintableEncoderBuf();
        int close();

    private:
        int writeToDevice(char c);
        void writeEncoded(char c);
        void writeRaw(char c);

        int _pending;
        int _lineLength;
        std::ostream & _ostr;
    };


    class Net_API QuotedPrintableEncoderIOS : public virtual std::ios
    /// The base class for QuotedPrintableEncoder.
    ///
    /// This class is needed to ensure the correct initialization
    /// order of the stream buffer and base classes.
    {
    public:
        QuotedPrintableEncoderIOS(std::ostream & ostr);
        ~QuotedPrintableEncoderIOS();
        int close();
        QuotedPrintableEncoderBuf * rdbuf();

    protected:
        QuotedPrintableEncoderBuf _buf;
    };


    class Net_API QuotedPrintableEncoder : public QuotedPrintableEncoderIOS, public std::ostream
    /// This ostream encodes all data
    /// written to it in quoted-printable encoding
    /// (see RFC 2045) and forwards it to a connected ostream.
    /// Always call close() when done
    /// writing data, to ensure proper
    /// completion of the encoding operation.
    {
    public:
        QuotedPrintableEncoder(std::ostream & ostr);
        ~QuotedPrintableEncoder();
    };


}
} // namespace Poco::Net


#endif // Net_QuotedPrintableEncoder_INCLUDED