38 строки
1.3 KiB
C
38 строки
1.3 KiB
C
|
#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 */
|