99a2dd955f
There is no reason for the DPDK libraries to all have 'librte_' prefix on the directory names. This prefix makes the directory names longer and also makes it awkward to add features referring to individual libraries in the build - should the lib names be specified with or without the prefix. Therefore, we can just remove the library prefix and use the library's unique name as the directory name, i.e. 'eal' rather than 'librte_eal' Signed-off-by: Bruce Richardson <bruce.richardson@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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