5 BN_zero, BN_one, BN_set_word, BN_get_word - BIGNUM assignment operations
9 #include <openssl/bn.h>
11 int BN_zero(BIGNUM *a);
12 int BN_one(BIGNUM *a);
14 BIGNUM *BN_value_one(void);
16 int BN_set_word(BIGNUM *a, unsigned long w);
17 unsigned long BN_get_word(BIGNUM *a);
21 BN_zero(), BN_one() and BN_set_word() set B<a> to the values 0, 1 and
22 B<w> respectively. BN_zero() and BN_one() are macros.
24 BN_value_one() returns a B<BIGNUM> constant of value 1. This constant
25 is useful for use in comparisons and assignment.
27 BN_get_word() returns B<a>, if it can be represented as an unsigned
32 BN_get_word() returns the value B<a>, and 0xffffffffL if B<a> cannot
33 be represented as an unsigned long.
35 BN_zero(), BN_one() and BN_set_word() return 1 on success, 0 otherwise.
36 BN_value_one() returns the constant.
40 Someone might change the constant.
42 If a B<BIGNUM> is equal to 0xffffffffL it can be represented as an
43 unsigned long but this value is also returned on error.
47 L<bn(3)|bn(3)>, L<BN_bn2bin(3)|BN_bn2bin(3)>
51 BN_zero(), BN_one() and BN_set_word() are available in all versions of
52 SSLeay and OpenSSL. BN_value_one() and BN_get_word() were added in