/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright (C) Yeico S. A. de C. V.
 * xlsLib -- A multiplatform, C++ library for dynamic generation of Excel (TM) 
 * files.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *  
 * $Source: /cvsroot/xlslib/xlslib/src/common/timespan.h,v $
 * $Revision: 1.1.1.1 $
 * $Author: darioglz $
 * $Date: 2004/08/27 16:32:05 $
 *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *
 * File description:
 *
 *
 *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#ifndef TIMESPAN_H
#define TIMESPAN_H
#include "config.h"
#include "systype.h"
#include <time.h>
#include <assert.h>

class CCpuClockTimespan
{
  enum
    { INVALID_VALUE = -1, };
 
 public:
  CCpuClockTimespan()
    : m_clockStart(  INVALID_VALUE),
    m_nUsedClockTicks( INVALID_VALUE)
    {}
  ~CCpuClockTimespan()
    {}

  void StartClock()
    {
      // the clock is already started !!!
      // stop it first !!!
      assert( m_clockStart == INVALID_VALUE);
      m_nUsedClockTicks = INVALID_VALUE;
      m_clockStart = clock();
    }

  void StopClock()
    {
      const clock_t clockStop = clock();

      // start the clock first !!!
      assert( m_clockStart != INVALID_VALUE);
      m_nUsedClockTicks = clockStop - m_clockStart;

      // after this, we can start it again !!!
      m_clockStart = INVALID_VALUE;
    }

  unsigned long GetUsedMilliseconds() const
    {
      const int MILLISECONDS_PER_SECOND = 1000;

      // the clock was never started,
      // or it's started, but it has not been stopped yet
      assert( m_nUsedClockTicks != INVALID_VALUE);

      double nSeconds =
	( ( double)m_nUsedClockTicks) / CLOCKS_PER_SEC;

      const unsigned long nMilliseconds =(clock_t)
	( unsigned long)( nSeconds * MILLISECONDS_PER_SECOND);

      return nMilliseconds;
    }

 private:

  // when did we Start to measure
  // clock time?
  int m_clockStart;

  // the used clock ticks, from Start to Stop
  int m_nUsedClockTicks;
};

#endif //TIMESPAN_H

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * $Log: timespan.h,v $
 * Revision 1.1.1.1  2004/08/27 16:32:05  darioglz
 * Initial Import.
 *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */