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);
DESCRIPTION
BN_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 VALUES
BN_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.
HISTORY
BN_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.
