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BN_cmp(3)                           OpenSSL                          BN_cmp(3)



NAME
       BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_abs_is_word,
       BN_is_odd - BIGNUM comparison and test functions

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/bn.h>

        int BN_cmp(const BIGNUM *a, const BIGNUM *b);
        int BN_ucmp(const BIGNUM *a, const BIGNUM *b);

        int BN_is_zero(const BIGNUM *a);
        int BN_is_one(const BIGNUM *a);
        int BN_is_word(const BIGNUM *a, const BN_ULONG w);
        int BN_abs_is_word(const BIGNUM *a, const BN_ULONG w);
        int BN_is_odd(const BIGNUM *a);

DESCRIPTION
       BN_cmp() compares the numbers a and b. BN_ucmp() compares their
       absolute values.

       BN_is_zero(), BN_is_one(), BN_is_word() and BN_abs_is_word() test if a
       equals 0, 1, w, or |w| respectively.  BN_is_odd() tests if a is odd.

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(), BN_abs_is_word() and
       BN_is_odd() return 1 if the condition is true, 0 otherwise.

HISTORY
       Prior to OpenSSL 1.1.0, BN_is_zero(), BN_is_one(), BN_is_word(),
       BN_abs_is_word() and BN_is_odd() were macros.

COPYRIGHT
       Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (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
       <https://www.openssl.org/source/license.html>.



3.0.12                            2023-05-07                         BN_cmp(3)