BN_cmp(3)                           OpenSSL                          BN_cmp(3)



NNAAMMEE
       BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_is_odd - BIGNUM
       comparison and test functions

SSYYNNOOPPSSIISS
        #include <openssl/bn.h>

        int BN_cmp(BIGNUM *a, BIGNUM *b);
        int BN_ucmp(BIGNUM *a, BIGNUM *b);

        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);

DDEESSCCRRIIPPTTIIOONN
       _B_N___c_m_p_(_) compares the numbers aa and bb. _B_N___u_c_m_p_(_) compares their abso-
       lute values.

       _B_N___i_s___z_e_r_o_(_), _B_N___i_s___o_n_e_(_) and _B_N___i_s___w_o_r_d_(_) test if aa equals 0, 1, or ww
       respectively. _B_N___i_s___o_d_d_(_) tests if a is odd.

       _B_N___i_s___z_e_r_o_(_), _B_N___i_s___o_n_e_(_), _B_N___i_s___w_o_r_d_(_) and _B_N___i_s___o_d_d_(_) are macros.

RREETTUURRNN VVAALLUUEESS
       _B_N___c_m_p_(_) returns -1 if aa < bb, 0 if aa == bb and 1 if aa > bb. _B_N___u_c_m_p_(_) is
       the same using the absolute values of aa and bb.

       _B_N___i_s___z_e_r_o_(_), _B_N___i_s___o_n_e_(_) _B_N___i_s___w_o_r_d_(_) and _B_N___i_s___o_d_d_(_) return 1 if the
       condition is true, 0 otherwise.

SSEEEE AALLSSOO
       _b_n(3)

HHIISSTTOORRYY
       _B_N___c_m_p_(_), _B_N___u_c_m_p_(_), _B_N___i_s___z_e_r_o_(_), _B_N___i_s___o_n_e_(_) and _B_N___i_s___w_o_r_d_(_) are
       available in all versions of SSLeay and OpenSSL.  _B_N___i_s___o_d_d_(_) was added
       in SSLeay 0.8.



1.0.2u                            2019-12-20                         BN_cmp(3)