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BN_SET_BIT(3)			    OpenSSL			 BN_SET_BIT(3)

NAME
       BN_set_bit, BN_clear_bit, BN_is_bit_set,	BN_mask_bits, BN_lshift,
       BN_lshift1, BN_rshift, BN_rshift1 - bit operations on BIGNUMs

SYNOPSIS
	#include <openssl/bn.h>

	int BN_set_bit(BIGNUM *a, int n);
	int BN_clear_bit(BIGNUM	*a, int	n);

	int BN_is_bit_set(const	BIGNUM *a, int n);

	int BN_mask_bits(BIGNUM	*a, int	n);

	int BN_lshift(BIGNUM *r, const BIGNUM *a, int n);
	int BN_lshift1(BIGNUM *r, BIGNUM *a);

	int BN_rshift(BIGNUM *r, BIGNUM	*a, int	n);
	int BN_rshift1(BIGNUM *r, BIGNUM *a);

DESCRIPTION
       BN_set_bit() sets bit n in a to 1 ("a|=(1<<n)").	The number is expanded
       if necessary.

       BN_clear_bit() sets bit n in a to 0 ("a&=~(1<<n)"). An error occurs if
       a is shorter than n bits.

       BN_is_bit_set() tests if	bit n in a is set.

       BN_mask_bits() truncates	a to an	n bit number ("a&=~((~0)>>n)").	 An
       error occurs if a already is shorter than n bits.

       BN_lshift() shifts a left by n bits and places the result in r
       ("r=a*2^n"). Note that n	must be	non-negative. BN_lshift1() shifts a
       left by one and places the result in r ("r=2*a").

       BN_rshift() shifts a right by n bits and	places the result in r
       ("r=a/2^n"). Note that n	must be	non-negative. BN_rshift1() shifts a
       right by	one and	places the result in r ("r=a/2").

       For the shift functions,	r and a	may be the same	variable.

RETURN VALUES
       BN_is_bit_set() returns 1 if the	bit is set, 0 otherwise.

       All other functions return 1 for	success, 0 on error. The error codes
       can be obtained by ERR_get_error(3).

SEE ALSO
       BN_num_bytes(3),	BN_add(3)

COPYRIGHT
       Copyright 2000-2017 The OpenSSL Project Authors.	All Rights Reserved.

       Licensed	under the OpenSSL license (the "License").  You	may not	use
       this file except	in compliance with the License.	 You can obtain	a copy
       in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>.

1.1.1d				  2019-09-10			 BN_SET_BIT(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | COPYRIGHT

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