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BN_CMP(3) FreeBSD Library Functions Manual BN_CMP(3) 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 SYNOPSIS #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); DESCRIPTION BN_cmp() compares the numbers a and b. BN_ucmp() compares their absolute values. BN_is_zero(), BN_is_one() and BN_is_word() test if a equals 0, 1, or w respectively. BN_abs_is_word() tests if the absolute value of a equals w. BN_is_odd() tests if a is odd. BN_ULONG is a macro that expands to unsigned long (= uint64_t) on _LP64 platforms and unsigned int (= uint32_t) elsewhere. RETURN VALUES BN_cmp() returns -1 if a<b, 0 if a==b, and 1 if a>b. BN_ucmp() is the same using the absolute values of a and b. BN_is_zero(), BN_is_one(), BN_is_word(), BN_abs_is_word(), and BN_is_odd() return 1 if the condition is true, 0 otherwise. SEE ALSO BN_new(3) HISTORY BN_cmp(), BN_ucmp(), BN_is_zero(), BN_is_one(), and BN_is_word() first appeared in SSLeay 0.5.1. BN_is_odd() first appeared in SSLeay 0.8.0. These functions have been available since OpenBSD 2.4. BN_abs_is_word() first appeared in OpenSSL 0.9.7 and has been available since OpenBSD 3.2. FreeBSD 14.1-RELEASE-p8 November 22, 2022 FreeBSD 14.1-RELEASE-p8