| /* 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_ */ |
