=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 <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);

=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<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.

=head1 RETURN VALUES

BN_cmp() returns -1 if B E<lt> B, 0 if B == B and 1 if

B E<gt> 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 COPYRIGHT

Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the "License").  You may not use

this file except in compliance with the License.  You can obtain a copy

in the file LICENSE in the source distribution or at

L<https://www.openssl.org/source/license.html>.

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