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<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>BN_cmp</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@hsxx.drive.ne.jp" /> </head> <body style="background-color: white"> <!-- INDEX BEGIN --> <div name="index"> <p><a name="__index__"></a></p> <ul> <li><a href="#name">NAME</a></li> <li><a href="#synopsis">SYNOPSIS</a></li> <li><a href="#description">DESCRIPTION</a></li> <li><a href="#return_values">RETURN VALUES</a></li> <li><a href="#history">HISTORY</a></li> <li><a href="#copyright">COPYRIGHT</a></li> </ul> <hr name="index" /> </div> <!-- INDEX END --> <p> </p> <hr /> <h1><a name="name">NAME</a></h1> <p>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</p> <p> </p> <hr /> <h1><a name="synopsis">SYNOPSIS</a></h1> <pre> #include <openssl/bn.h></pre> <pre> int BN_cmp(const BIGNUM *a, const BIGNUM *b); int BN_ucmp(const BIGNUM *a, const BIGNUM *b);</pre> <pre> 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);</pre> <p> </p> <hr /> <h1><a name="description">DESCRIPTION</a></h1> <p><code>BN_cmp()</code> compares the numbers <em>a</em> and <em>b</em>. <code>BN_ucmp()</code> compares their absolute values.</p> <p><code>BN_is_zero()</code>, <code>BN_is_one()</code>, <code>BN_is_word()</code> and <code>BN_abs_is_word()</code> test if <em>a</em> equals 0, 1, <em>w</em>, or |<em>w</em>| respectively. <code>BN_is_odd()</code> tests if <em>a</em> is odd.</p> <p> </p> <hr /> <h1><a name="return_values">RETURN VALUES</a></h1> <p><code>BN_cmp()</code> returns -1 if <em>a</em> < <em>b</em>, 0 if <em>a</em> == <em>b</em> and 1 if <em>a</em> > <em>b</em>. <code>BN_ucmp()</code> is the same using the absolute values of <em>a</em> and <em>b</em>.</p> <p><code>BN_is_zero()</code>, <code>BN_is_one()</code> <code>BN_is_word()</code>, <code>BN_abs_is_word()</code> and <code>BN_is_odd()</code> return 1 if the condition is true, 0 otherwise.</p> <p> </p> <hr /> <h1><a name="history">HISTORY</a></h1> <p>Prior to OpenSSL 1.1.0, <code>BN_is_zero()</code>, <code>BN_is_one()</code>, <code>BN_is_word()</code>, <code>BN_abs_is_word()</code> and <code>BN_is_odd()</code> were macros.</p> <p> </p> <hr /> <h1><a name="copyright">COPYRIGHT</a></h1> <p>Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.</p> <p>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 <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>