185 lines
5.2 KiB
Groff
185 lines
5.2 KiB
Groff
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.\" ======================================================================
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.\"
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.IX Title "BN_cmp 3"
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.TH BN_cmp 3 "0.9.7" "2003-01-13" "OpenSSL"
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.UC
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.SH "NAME"
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BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_is_odd \- \s-1BIGNUM\s0 comparison and test functions
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/bn.h>
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.Ve
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.Vb 2
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\& int BN_cmp(BIGNUM *a, BIGNUM *b);
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\& int BN_ucmp(BIGNUM *a, BIGNUM *b);
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.Ve
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.Vb 4
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\& int BN_is_zero(BIGNUM *a);
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\& int BN_is_one(BIGNUM *a);
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\& int BN_is_word(BIGNUM *a, BN_ULONG w);
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\& int BN_is_odd(BIGNUM *a);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fIBN_cmp()\fR compares the numbers \fBa\fR and \fBb\fR. \fIBN_ucmp()\fR compares their
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absolute values.
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.PP
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\&\fIBN_is_zero()\fR, \fIBN_is_one()\fR and \fIBN_is_word()\fR test if \fBa\fR equals 0, 1,
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or \fBw\fR respectively. \fIBN_is_odd()\fR tests if a is odd.
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.PP
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\&\fIBN_is_zero()\fR, \fIBN_is_one()\fR, \fIBN_is_word()\fR and \fIBN_is_odd()\fR are macros.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fIBN_cmp()\fR returns \-1 if \fBa\fR < \fBb\fR, 0 if \fBa\fR == \fBb\fR and 1 if
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\&\fBa\fR > \fBb\fR. \fIBN_ucmp()\fR is the same using the absolute values
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of \fBa\fR and \fBb\fR.
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.PP
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\&\fIBN_is_zero()\fR, \fIBN_is_one()\fR \fIBN_is_word()\fR and \fIBN_is_odd()\fR return 1 if
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the condition is true, 0 otherwise.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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bn(3)
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.SH "HISTORY"
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.IX Header "HISTORY"
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\&\fIBN_cmp()\fR, \fIBN_ucmp()\fR, \fIBN_is_zero()\fR, \fIBN_is_one()\fR and \fIBN_is_word()\fR are
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available in all versions of SSLeay and OpenSSL.
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\&\fIBN_is_odd()\fR was added in SSLeay 0.8.
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