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[dragonfly.git] / secure / lib / libcrypto / man / BN_cmp.3

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.TH BN_cmp 3 "0.9.7d" "2/Sep/2004" "OpenSSL"
.UC
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.rm #[ #] #H #V #F C
.SH "NAME"
BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_is_odd \- BIGNUM comparison and test functions
.SH "SYNOPSIS"
.PP
.Vb 1
\& #include <openssl/bn.h>
.Ve
.Vb 2
\& int BN_cmp(BIGNUM *a, BIGNUM *b);
\& int BN_ucmp(BIGNUM *a, BIGNUM *b);
.Ve
.Vb 4
\& 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);
.Ve
.SH "DESCRIPTION"
\fIBN_cmp()\fR compares the numbers \fBa\fR and \fBb\fR. \fIBN_ucmp()\fR compares their
absolute values.
.PP
\fIBN_is_zero()\fR, \fIBN_is_one()\fR and \fIBN_is_word()\fR test if \fBa\fR equals 0, 1,
or \fBw\fR respectively. \fIBN_is_odd()\fR tests if a is odd.
.PP
\fIBN_is_zero()\fR, \fIBN_is_one()\fR, \fIBN_is_word()\fR and \fIBN_is_odd()\fR are macros.
.SH "RETURN VALUES"
\fIBN_cmp()\fR returns \-1 if \fBa\fR < \fBb\fR, 0 if \fBa\fR == \fBb\fR and 1 if
\fBa\fR > \fBb\fR. \fIBN_ucmp()\fR is the same using the absolute values
of \fBa\fR and \fBb\fR.
.PP
\fIBN_is_zero()\fR, \fIBN_is_one()\fR \fIBN_is_word()\fR and \fIBN_is_odd()\fR return 1 if
the condition is true, 0 otherwise.
.SH "SEE ALSO"
bn(3)
.SH "HISTORY"
\fIBN_cmp()\fR, \fIBN_ucmp()\fR, \fIBN_is_zero()\fR, \fIBN_is_one()\fR and \fIBN_is_word()\fR are
available in all versions of SSLeay and OpenSSL.
\fIBN_is_odd()\fR was added in SSLeay 0.8.

.rn }` ''
.IX Title "BN_cmp 3"
.IX Name "BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_is_odd - BIGNUM comparison and test functions"

.IX Header "NAME"

.IX Header "SYNOPSIS"

.IX Header "DESCRIPTION"

.IX Header "RETURN VALUES"

.IX Header "SEE ALSO"

.IX Header "HISTORY"