debugout.h

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/*
Copyright (C) 2012 Intel Corporation

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef DEBUGOUT__H__
#define DEBUGOUT__H__

#include <string>
#include <iostream>
#include <fstream>
#include <sstream>
#include <stdexcept>
#include "timestamp.h"

using namespace std;

void debugOut(const string &message);

namespace amb
{
void deprecateMethod(const string &methodName, const std::string & version);
}

class DebugOut
{
public:

    static const int Error;

    static const int Warning;

    DebugOut(int debugLevel = 4)
    {
        mDebugLevel = debugLevel;

        if(mDebugLevel <= debugThreshhold || mDebugLevel == Error || mDebugLevel == Warning)
        {
            ostream out(buf);
            out.precision(15);
            out<<bufferTime(amb::currentTime())<<" | ";

            if(mDebugLevel == Error)
                out<<"ERROR ";
            if(mDebugLevel == Warning)
                out<<"WARNING ";
        }
    }
    DebugOut const& operator << (const string &message) const
    {
        if(mDebugLevel <= debugThreshhold || mDebugLevel == Error || mDebugLevel == Warning)
        {
            ostream out(buf);
            out.precision(15);
            out<<message;
        }
        return *this;
    }

    DebugOut const& operator << (ostream & (*manip)(std::ostream&)) const
    {


        if(mDebugLevel <= debugThreshhold || mDebugLevel == Error || mDebugLevel == Warning)
        {
            ostream out(buf);
            out.precision(15);
            out<<endl;

            if((mDebugLevel == Error && throwErr))
            {
                throw std::runtime_error("Abort on Error is set");
            }
            else if ((mDebugLevel == Warning && throwWarn))
            {
                throw std::runtime_error("Abort on Warning is set");
            }
        }
        return *this;
    }

    DebugOut const & operator << (double val) const
    {
        if(mDebugLevel <= debugThreshhold || mDebugLevel == Error || mDebugLevel == Warning)
        {
            ostream out(buf);
            out.precision(15);
            out<<val<<" ";
        }
        return *this;
    }

    static void setDebugThreshhold(int th)
    {
        debugThreshhold = th;
    }

    static void setOutput(ostream &o)
    {
        buf = o.rdbuf();
    }

    static void setThrowWarn(bool v)
    {
        throwWarn = v;
    }

    static void setThrowErr(bool v)
    {
        throwErr = v;
    }

    static const int getDebugThreshhold()
    {
        return debugThreshhold;
    }

private:

    std::string bufferTime(double time)
    {
        ostringstream f;

        f.precision(15);

        f<<time;

        while(f.str().length() <= 15)
        {
            f<<" ";
        }

        return f.str();
    }

    static int debugThreshhold;
    static std::streambuf *buf;
    static bool throwWarn;
    static bool throwErr;
    int mDebugLevel;
};

#endif