/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreTimespec
*
* @brief This source file contains the implementation of
* _Timespec_Divide().
*/
/*
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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;
}
