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.
SEE ALSO
HISTORY
BN_cmp(),
BN_ucmp(), BN_is_zero(),
BN_is_one(), and
BN_is_word() first appeared in SSLeay 0.5.1.
BN_is_odd() first appeared in SSLeay 0.8.0. All
these functions have been available since OpenBSD
2.4.