forked from Imagelibrary/rtems
88c74ab115
Delete TOD_MICROSECONDS_PER_SECOND, TOD_MICROSECONDS_TO_TICKS() and TOD_MILLISECONDS_TO_TICKS().
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/**
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* @file
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*
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* @brief Divide Timespec By Integer
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* @ingroup Timespec
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*/
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/*
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* COPYRIGHT (c) 1989-2007.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems/score/timespec.h>
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#include <rtems/score/tod.h>
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void _Timespec_Divide(
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const struct timespec *lhs,
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const struct timespec *rhs,
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uint32_t *ival_percentage,
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uint32_t *fval_percentage
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)
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{
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uint64_t left, right, answer;
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/*
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* For math simplicity just convert the timespec to nanoseconds
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* in a 64-bit integer.
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*/
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left = lhs->tv_sec * (uint64_t)TOD_NANOSECONDS_PER_SECOND;
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left += lhs->tv_nsec;
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right = rhs->tv_sec * (uint64_t)TOD_NANOSECONDS_PER_SECOND;
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right += rhs->tv_nsec;
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if ( right == 0 ) {
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*ival_percentage = 0;
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*fval_percentage = 0;
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return;
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}
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/*
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* Put it back in the timespec result.
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*
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* TODO: Rounding on the last digit of the fval.
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*/
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answer = (left * 100000) / right;
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*ival_percentage = answer / 1000;
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*fval_percentage = answer % 1000;
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}
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