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135 .TH BN_cmp 3 "2009-04-11" "0.9.8k" "OpenSSL"
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141 BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_is_odd \- BIGNUM comparison and test functions
143 .IX Header "SYNOPSIS"
145 \& #include <openssl/bn.h>
147 \& int BN_cmp(BIGNUM *a, BIGNUM *b);
148 \& int BN_ucmp(BIGNUM *a, BIGNUM *b);
150 \& int BN_is_zero(BIGNUM *a);
151 \& int BN_is_one(BIGNUM *a);
152 \& int BN_is_word(BIGNUM *a, BN_ULONG w);
153 \& int BN_is_odd(BIGNUM *a);
156 .IX Header "DESCRIPTION"
157 \&\fIBN_cmp()\fR compares the numbers \fBa\fR and \fBb\fR. \fIBN_ucmp()\fR compares their
160 \&\fIBN_is_zero()\fR, \fIBN_is_one()\fR and \fIBN_is_word()\fR test if \fBa\fR equals 0, 1,
161 or \fBw\fR respectively. \fIBN_is_odd()\fR tests if a is odd.
163 \&\fIBN_is_zero()\fR, \fIBN_is_one()\fR, \fIBN_is_word()\fR and \fIBN_is_odd()\fR are macros.
165 .IX Header "RETURN VALUES"
166 \&\fIBN_cmp()\fR returns \-1 if \fBa\fR < \fBb\fR, 0 if \fBa\fR == \fBb\fR and 1 if
167 \&\fBa\fR > \fBb\fR. \fIBN_ucmp()\fR is the same using the absolute values
168 of \fBa\fR and \fBb\fR.
170 \&\fIBN_is_zero()\fR, \fIBN_is_one()\fR \fIBN_is_word()\fR and \fIBN_is_odd()\fR return 1 if
171 the condition is true, 0 otherwise.
173 .IX Header "SEE ALSO"
177 \&\fIBN_cmp()\fR, \fIBN_ucmp()\fR, \fIBN_is_zero()\fR, \fIBN_is_one()\fR and \fIBN_is_word()\fR are
178 available in all versions of SSLeay and OpenSSL.
179 \&\fIBN_is_odd()\fR was added in SSLeay 0.8.