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/**
* @file
*
* @ingroup RTEMSScoreTimespec
*
* @brief This source file contains the implementation of
* _Timespec_Divide().
*/
/*
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/timespec.h>
#include <rtems/score/todimpl.h>
void _Timespec_Divide(
const struct timespec *lhs,
const struct timespec *rhs,
uint32_t *ival_percentage,
uint32_t *fval_percentage
)
{
uint64_t left, right, answer;
/*
* For math simplicity just convert the timespec to nanoseconds
* in a 64-bit integer.
*/
left = lhs->tv_sec * (uint64_t)TOD_NANOSECONDS_PER_SECOND;
left += lhs->tv_nsec;
right = rhs->tv_sec * (uint64_t)TOD_NANOSECONDS_PER_SECOND;
right += rhs->tv_nsec;
if ( right == 0 ) {
*ival_percentage = 0;
*fval_percentage = 0;
return;
}
/*
* Put it back in the timespec result.
*
* TODO: Rounding on the last digit of the fval.
*/
answer = (left * 100000) / right;
*ival_percentage = answer / 1000;
*fval_percentage = answer % 1000;
}
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