blob: f172e0b191ecdd789287b46a3bc3c22d554cb3c2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _COMMONLIB_RATIONAL_H_
#define _COMMONLIB_RATIONAL_H_
#include <stddef.h>
/*
* Calculate the best rational approximation for a given fraction,
* with the restriction of maximum numerator and denominator.
* For example, to find the approximation of 3.1415 with 5 bit denominator
* and 8 bit numerator fields:
*
* rational_best_approximation(31415, 10000,
* (1 << 8) - 1, (1 << 5) - 1, &n, &d);
*/
void rational_best_approximation(
unsigned long numerator, unsigned long denominator,
unsigned long max_numerator, unsigned long max_denominator,
unsigned long *best_numerator, unsigned long *best_denominator);
#endif /* _COMMONLIB_RATIONAL_H_ */
|
