/*
*******************************************************************************
*  Copyright (c) 1996 Martin Poole                            *
*******************************************************************************
**
** WARNING !!  WARNING !! WARNING !! WARNING !! WARNING !! WARNING !!
**
** Any changes to be made to this file should first be checked with
** mplib1 source control for library integrity.
**
** mplib1 source control can be reached at  mplib1@quatermass.co.uk
** 
*                                                                             *
*  $Source$
*  $Author$
*  $Date$
*  $Revision$
*                                                                             *
*******************************************************************************
*                                                                             *
* $Log$
*
*******************************************************************************
*/

#ident "$Header$"

/* ------------------------------------------------------------------
    Include files
   ------------------------------------------------------------------ */

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <time.h>
#include <string.h>
#include <errno.h>
#include <sys/resource.h>

#include <mplib1/mplib1_config.h>
#include <mplib1/stopwatch.h>

/* ------------------------------------------------------------------
    defines
   ------------------------------------------------------------------ */

/* ------------------------------------------------------------------
    Code starts here
   ------------------------------------------------------------------ */

void
diff_timevals( struct timeval *end_p, struct timeval *start_p )
{
    /* Generate the difference, subtract the start from the end */
    end_p->tv_sec -= start_p->tv_sec;
    if (end_p->tv_usec < start_p->tv_usec)
    {
	end_p->tv_usec = (end_p->tv_usec + 1000000 - start_p->tv_usec);
	end_p->tv_sec--;
    }else
    {
	end_p->tv_usec -= start_p->tv_usec;
    }
    return;
}

void
add_timevals( struct timeval *cump, struct timeval *tvp )
{
    if (cump && tvp)
    {
	/* Now add it in */
	cump->tv_usec += tvp->tv_usec;
	if (cump->tv_usec >= 1000000)
	{
	    cump->tv_usec -= 1000000;
	    cump->tv_sec++;
	}
	cump->tv_sec += tvp->tv_sec;
    }
    return;
}


void
accum_stop_timevals( struct stopwatch *stp, struct timeval *etp )
{
    /* get the difference between the start and end time */
    diff_timevals( etp, &stp->start_time );
    /* Now add it in */
    add_timevals( &stp->cumulative_time, etp );
    return;
}


char *
display_stopwatch( struct stopwatch *stp, int mode )
{
    switch( mode )
    {
    case 0 :
	if (stp->cumulative_time.tv_sec < 1000)
	{
	    sprintf( stp->elps_str, "%03d.%02d seconds",
		    (int)stp->cumulative_time.tv_sec,
		    (int)stp->cumulative_time.tv_usec/10000 );
	}else
	{
	    sprintf( stp->elps_str, "%06d.%02d seconds",
		    (int)stp->cumulative_time.tv_sec,
		    (int)stp->cumulative_time.tv_usec/10000 );
	}
	break;
    default :
	strcpy( stp->elps_str, "Unknown display mode" );
	break;
    }
    return(stp->elps_str);
}


/* -- End of File -- */