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BN_zero(3)		     OpenSSL		       BN_zero(3)

NAME
       BN_zero, BN_one, BN_value_one, BN_set_word, BN_get_word -
       BIGNUM assignment operations

SYNOPSIS
	#include <openssl/bn.h>

	int BN_zero(BIGNUM *a);
	int BN_one(BIGNUM *a);

	BIGNUM *BN_value_one(void);

	int BN_set_word(BIGNUM *a, unsigned long w);
	unsigned long BN_get_word(BIGNUM *a);

DESCRIPTION
       BN_zero(), BN_one() and BN_set_word() set a to the values
       0, 1 and w respectively.	 BN_zero() and BN_one() are
       macros.

       BN_value_one() returns a BIGNUM constant of value 1. This
       constant is useful for use in comparisons and assignment.

       BN_get_word() returns a, if it can be represented as an
       unsigned long.

RETURN VALUES
       BN_get_word() returns the value a, and 0xffffffffL if a
       cannot be represented as an unsigned long.

       BN_zero(), BN_one() and BN_set_word() return 1 on success,
       0 otherwise.  BN_value_one() returns the constant.

BUGS
       Someone might change the constant.

       If a BIGNUM is equal to 0xffffffffL it can be represented
       as an unsigned long but this value is also returned on
       error.

SEE ALSO
       bn(3), BN_bn2bin(3)

HISTORY
       BN_zero(), BN_one() and BN_set_word() are available in all
       versions of SSLeay and OpenSSL. BN_value_one() and
       BN_get_word() were added in SSLeay 0.8.

       operations"

26/Feb/2001		      0.9.6				1

BN_zero(3)		     OpenSSL		       BN_zero(3)

26/Feb/2001		      0.9.6				2

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