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BN_is_zero.3
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "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 .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBBN_cmp()\fR compares the numbers \fIa\fR and \fIb\fR. \fBBN_ucmp()\fR compares their absolute values. .PP \&\fBBN_is_zero()\fR, \fBBN_is_one()\fR, \fBBN_is_word()\fR and \fBBN_abs_is_word()\fR test if \&\fIa\fR equals 0, 1, \fIw\fR, or |\fIw\fR| respectively. \&\fBBN_is_odd()\fR tests if \fIa\fR is odd. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBBN_cmp()\fR returns \-1 if \fIa\fR < \fIb\fR, 0 if \fIa\fR == \fIb\fR and 1 if \&\fIa\fR > \fIb\fR. \fBBN_ucmp()\fR is the same using the absolute values of \fIa\fR and \fIb\fR. .PP \&\fBBN_is_zero()\fR, \fBBN_is_one()\fR \fBBN_is_word()\fR, \fBBN_abs_is_word()\fR and \&\fBBN_is_odd()\fR return 1 if the condition is true, 0 otherwise. .SH "HISTORY" .IX Header "HISTORY" Prior to OpenSSL 1.1.0, \fBBN_is_zero()\fR, \fBBN_is_one()\fR, \fBBN_is_word()\fR, \&\fBBN_abs_is_word()\fR and \fBBN_is_odd()\fR were macros. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2000\-2021 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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