Serial md code

//
// elapsed.h - header file for elapsed time functions in c/c++
//
// Copyright (c) 2013-2014  Ramses van Zon
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#ifndef _ELAPSEDTIME_
#define _ELAPSEDTIME_

#include <sys/time.h>
#include <stdio.h>

typedef double Stopwatch;

static inline double elapsed_etime()
{
   struct timeval t;
   gettimeofday(&t, 0);
   return t.tv_sec + 0.000001 * t.tv_usec;
}

static inline void elapsed_write(double time)
{
   int continu = 0;
   int recapsec = 0;
   unsigned long long itime = (unsigned long long int)(time*1000000);
   if (itime>=1000)
   {
      if (itime > 86400000000ULL)
      {
         fprintf(stderr, "%llud:", itime/86400000000ULL);
         itime %= 86400000000ULL;
         continu = 1;
         recapsec = 1;
      }
      if (itime>3600000000ULL)
      {
         fprintf(stderr, "%lludh:", itime/3600000000ULL);
         itime %= 3600000000ULL;
         continu = 1;
         recapsec = 1;
      }
      if (itime>60000000ULL)
      {
         fprintf(stderr, "%llum:", itime/60000000ULL);
         itime %= 60000000ULL;
         continu = 1;
         recapsec = 1;
      }
      fprintf(stderr, "%llu.", itime/1000000);
      itime %= 1000000;
      if (itime>1000 || continu==1)
      {
         fprintf(stderr, "%03llus", itime/1000);
         itime %= 1000;
      }
   } else {
      fprintf(stderr, "%llu microsec.", itime);
   }
   if (recapsec == 1)
      fprintf(stderr, " (%ds)", (int)time);
}

#define START -elapsed_etime()

void stopwatchStop(Stopwatch *sw)
{
   *sw += elapsed_etime();
   elapsed_write(*sw);
   fprintf(stderr, " elapsed\n");
   *sw = -elapsed_etime();
}

#endif