68c1f26d42
Modify internal structure and functions to support 64-bit values for rates and stats parameters. Signed-off-by: Jasvinder Singh <jasvinder.singh@intel.com> Signed-off-by: Lukasz Krakowiak <lukaszx.krakowiak@intel.com> Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#ifndef __INCLUDE_RTE_APPROX_H__
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#define __INCLUDE_RTE_APPROX_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @file
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* RTE Rational Approximation
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*
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* Given a rational number alpha with 0 < alpha < 1 and a precision d, the goal
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* is to find positive integers p, q such that alpha - d < p/q < alpha + d, and
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* q is minimal.
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*
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***/
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#include <stdint.h>
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/**
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* Find best rational approximation
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*
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* @param alpha
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* Rational number to approximate
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* @param d
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* Precision for the rational approximation
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* @param p
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* Pointer to pre-allocated space where the numerator of the rational
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* approximation will be stored when operation is successful
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* @param q
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* Pointer to pre-allocated space where the denominator of the rational
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* approximation will be stored when operation is successful
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* @return
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* 0 upon success, error code otherwise
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*/
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int rte_approx(double alpha, double d, uint32_t *p, uint32_t *q);
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/**
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* Find best rational approximation (64 bit version)
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*
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* @param alpha
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* Rational number to approximate
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* @param d
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* Precision for the rational approximation
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* @param p
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* Pointer to pre-allocated space where the numerator of the rational
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* approximation will be stored when operation is successful
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* @param q
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* Pointer to pre-allocated space where the denominator of the rational
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* approximation will be stored when operation is successful
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* @return
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* 0 upon success, error code otherwise
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*/
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int rte_approx_64(double alpha, double d, uint64_t *p, uint64_t *q);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCLUDE_RTE_APPROX_H__ */
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