5 BN_zero, BN_one, BN_value_one, BN_set_word, BN_get_word - BIGNUM assignment
10 #include <openssl/bn.h>
12 void BN_zero(BIGNUM *a);
13 int BN_one(BIGNUM *a);
15 const BIGNUM *BN_value_one(void);
17 int BN_set_word(BIGNUM *a, unsigned long w);
18 unsigned long BN_get_word(BIGNUM *a);
22 #if OPENSSL_API_COMPAT < 0x00908000L
23 int BN_zero(BIGNUM *a);
28 BN_zero(), BN_one() and BN_set_word() set B<a> to the values 0, 1 and
29 B<w> respectively. BN_zero() and BN_one() are macros.
31 BN_value_one() returns a B<BIGNUM> constant of value 1. This constant
32 is useful for use in comparisons and assignment.
34 BN_get_word() returns B<a>, if it can be represented as an unsigned
39 BN_get_word() returns the value B<a>, and 0xffffffffL if B<a> cannot
40 be represented as an unsigned long.
42 BN_one(), BN_set_word() and the deprecated version of BN_zero()
43 return 1 on success, 0 otherwise.
44 BN_value_one() returns the constant.
45 The preferred version of BN_zer() never fails and returns no value.
49 Someone might change the constant.
51 If a B<BIGNUM> is equal to 0xffffffffL it can be represented as an
52 unsigned long but this value is also returned on error.
56 L<bn(3)>, L<BN_bn2bin(3)>