cmnMultiplexerStreambufProxy.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-    */
/* ex: set filetype=cpp softtabstop=4 shiftwidth=4 tabstop=4 cindent expandtab: */

/*

  Author(s):  Ofri Sadowsky
  Created on: 2002-05-20

  (C) Copyright 2002-2007 Johns Hopkins University (JHU), All Rights
  Reserved.

--- begin cisst license - do not edit ---

This software is provided "as is" under an open source license, with
no warranty.  The complete license can be found in license.txt and
http://www.cisst.org/cisst/license.txt.

--- end cisst license ---

*/


#pragma once

#ifndef _cmnMultiplexerStreambufProxy_h
#define _cmnMultiplexerStreambufProxy_h

#include <cisstCommon/cmnPortability.h>
#include <cisstCommon/cmnLODMultiplexerStreambuf.h>

#include <list>
#include <algorithm>

template<class _element, class _trait>
class cmnMultiplexerStreambufProxy : public std::basic_streambuf<_element, _trait>
{
private:
    cmnMultiplexerStreambufProxy(const cmnMultiplexerStreambufProxy<_element, _trait> & other);

 public:

    typedef cmnLODMultiplexerStreambuf<_element, _trait> ChannelType;
    typedef typename std::basic_streambuf<_element, _trait>::int_type int_type;

    cmnMultiplexerStreambufProxy(ChannelType *output, cmnLogLevel level)
        : OutputChannel(output), LogLevel(level)
        {}

    cmnLogLevel GetLOD(void) const {
        return LogLevel;
    }

    void SetLOD(cmnLogLevel level) {
        LogLevel = level;
    }

    ChannelType * GetOutput(void) const {
        return OutputChannel;
    }

    // Here we override the basic_streambuf methods for multiplexing.
    // This part is declared 'protected' following the declarations of
    // basic_streambuf. See basic_streambuf documentation for more
    // details.
 protected:

    virtual std::streamsize xsputn(const _element * s, std::streamsize n);

    virtual int sync(void);

    virtual int_type overflow(int_type c = _trait::eof());


 private:
    ChannelType * OutputChannel;
    cmnLogLevel LogLevel;

};


//********************************
// Template method implementation
//********************************


template <class _element, class _trait>
std::streamsize cmnMultiplexerStreambufProxy<_element, _trait>::xsputn(const _element *s, std::streamsize n)
{
    return OutputChannel->xsputn(s, n, LogLevel);
}


template <class _element, class _trait>
int cmnMultiplexerStreambufProxy<_element, _trait>::sync()
{
    return OutputChannel->sync();
}


template<class _element, class _trait>
typename cmnMultiplexerStreambufProxy<_element, _trait>::int_type
cmnMultiplexerStreambufProxy<_element, _trait>::overflow(int_type c)
{
    return OutputChannel->overflow(c, LogLevel);
}


#endif  // _cmnMultiplexerStreambufProxy_h