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=pod
=head1 NAME
BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_is_odd - BIGNUM comparison and test functions
=head1 SYNOPSIS
#include
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);
=head1 DESCRIPTION
BN_cmp() compares the numbers B and B. BN_ucmp() compares their
absolute values.
BN_is_zero(), BN_is_one() and BN_is_word() test if B equals 0, 1,
or B respectively. BN_is_odd() tests if a is odd.
BN_is_zero(), BN_is_one(), BN_is_word() and BN_is_odd() are macros.
=head1 RETURN VALUES
BN_cmp() returns -1 if B E B, 0 if B == B and 1 if
B E B. BN_ucmp() is the same using the absolute values
of B and B.
BN_is_zero(), BN_is_one() BN_is_word() and BN_is_odd() return 1 if
the condition is true, 0 otherwise.
=head1 SEE ALSO
L
=head1 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.
=cut