DtDebugLog.h

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/******************************************************************************
** Copyright (c) 2017 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once
#include <vrvUtil/vrvUtil.h>
#include <vlutil/vlPrint.h>
#include <vlutil/vlExceptions.h>
#include <ostream>

namespace makVrv
{
   #define DT_LOG_WARN  log().out(DtDebugLog::Warning) << "Warning: " << __FUNCTION__ << ": "
   #define DT_LOG_INFO  log().out(DtDebugLog::Information) << "Info: "  << __FUNCTION__ << ": "
   #define DT_LOG_DEBUG log().out(DtDebugLog::Debug) << "Debug: " << __FUNCTION__ << ": "
   #define DT_LOG_OUT log().out()
   #define DT_LOG_LEVEL(a) log().levelWillPrint(a)

   class DT_DLL_VRVUTIL DtDebugLog
   {
   public:

      enum PrintLevel
      {
         Warning     = 1,
         Information = 2,
         Debug       = 4,
         PrintLevel_End = 5
      };

      DtDebugLog(const std::string& filename);

      virtual ~DtDebugLog();

      inline bool levelWillPrint(DtDebugLog::PrintLevel alevel) 
      { 
         return level() >= alevel;
      }

      virtual void setLevel(DtDebugLog::PrintLevel alevel);

      virtual void setOutputStream(DtOutputStream* stream);

      virtual DtDebugLog::PrintLevel level();

      inline std::ostream& out(DtDebugLog::PrintLevel level = DtDebugLog::Information)
      {
         if(levelWillPrint(level))
            return *myOutput;
         else
            return *myEmptyOutput;
      }

      DtOutputStream* outputStream();

   protected:
      PrintLevel myLevel;

      DtFilePrinter* myFilePrinter;

      DtOutputStreamBuffer* myBuffer;

      DtOutputStreamBuffer* myEmptyBuffer;

      int myPrintLevelThresholdRef;

      DtOutputStream* myOutput;

      std::ostream* myEmptyOutput;
   };
}