BN_CMP(3) BSD Library Functions Manual BN_CMP(3)NAME
BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_is_odd — BIGNUM
comparison and test functions
SYNOPSIS
#include <openssl/bn.h>
int
BN_cmp(BIGNUM *a, BIGNUM *b);
int
BN_ucmp(BIGNUM *a, BIGNUM *b);
int
BN_is_zero(BIGNUM *a);
int
BN_is_one(BIGNUM *a);
int
BN_is_word(BIGNUM *a, BN_ULONG w);
int
BN_is_odd(BIGNUM *a);
DESCRIPTIONBN_cmp() compares the numbers a and b. BN_ucmp() compares their absolute
values.
BN_is_zero(), BN_is_one() and BN_is_word() test if a equals 0, 1, or w
respectively. BN_is_odd() tests if a is odd.
BN_is_zero(), BN_is_one(), BN_is_word(), and BN_is_odd() are macros.
RETURN VALUESBN_cmp() returns -1 if a<b, 0 if a==b, and 1 if a>b. BN_ucmp() is the
same using the absolute values of a and b.
BN_is_zero(), BN_is_one(), BN_is_word(), and BN_is_odd() return 1 if the
condition is true, 0 otherwise.
SEE ALSObn(3)HISTORYBN_cmp(), BN_ucmp(), BN_is_zero(), BN_is_one() and BN_is_word() are
available in all versions of SSLeay and OpenSSL. BN_is_odd() was added
in SSLeay 0.8.
BSD May 28, 2024 BSD