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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_PRIME_NUMBERS_H
#define __LINUX_PRIME_NUMBERS_H
#include <linux/types.h>
bool is_prime_number(unsigned long x);
unsigned long next_prime_number(unsigned long x);
/**
* for_each_prime_number - iterate over each prime upto a value
* @prime: the current prime number in this iteration
* @max: the upper limit
*
* Starting from the first prime number 2 iterate over each prime number up to
* the @max value. On each iteration, @prime is set to the current prime number.
* @max should be less than ULONG_MAX to ensure termination. To begin with
* @prime set to 1 on the first iteration use for_each_prime_number_from()
* instead.
*/
#define for_each_prime_number(prime, max) \
for_each_prime_number_from((prime), 2, (max))
/**
* for_each_prime_number_from - iterate over each prime upto a value
* @prime: the current prime number in this iteration
* @from: the initial value
* @max: the upper limit
*
* Starting from @from iterate over each successive prime number up to the
* @max value. On each iteration, @prime is set to the current prime number.
* @max should be less than ULONG_MAX, and @from less than @max, to ensure
* termination.
*/
#define for_each_prime_number_from(prime, from, max) \
for (prime = (from); prime <= (max); prime = next_prime_number(prime))
#endif /* !__LINUX_PRIME_NUMBERS_H */
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