1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/nss/lib/freebl/mpi/mplogic.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,52 @@
1.4 +/*
1.5 + * mplogic.h
1.6 + *
1.7 + * Bitwise logical operations on MPI values
1.8 + *
1.9 + * This Source Code Form is subject to the terms of the Mozilla Public
1.10 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.11 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.12 +
1.13 +#ifndef _H_MPLOGIC_
1.14 +#define _H_MPLOGIC_
1.15 +
1.16 +#include "mpi.h"
1.17 +
1.18 +/*
1.19 + The logical operations treat an mp_int as if it were a bit vector,
1.20 + without regard to its sign (an mp_int is represented in a signed
1.21 + magnitude format). Values are treated as if they had an infinite
1.22 + string of zeros left of the most-significant bit.
1.23 + */
1.24 +
1.25 +/* Parity results */
1.26 +
1.27 +#define MP_EVEN MP_YES
1.28 +#define MP_ODD MP_NO
1.29 +
1.30 +/* Bitwise functions */
1.31 +
1.32 +mp_err mpl_not(mp_int *a, mp_int *b); /* one's complement */
1.33 +mp_err mpl_and(mp_int *a, mp_int *b, mp_int *c); /* bitwise AND */
1.34 +mp_err mpl_or(mp_int *a, mp_int *b, mp_int *c); /* bitwise OR */
1.35 +mp_err mpl_xor(mp_int *a, mp_int *b, mp_int *c); /* bitwise XOR */
1.36 +
1.37 +/* Shift functions */
1.38 +
1.39 +mp_err mpl_rsh(const mp_int *a, mp_int *b, mp_digit d); /* right shift */
1.40 +mp_err mpl_lsh(const mp_int *a, mp_int *b, mp_digit d); /* left shift */
1.41 +
1.42 +/* Bit count and parity */
1.43 +
1.44 +mp_err mpl_num_set(mp_int *a, int *num); /* count set bits */
1.45 +mp_err mpl_num_clear(mp_int *a, int *num); /* count clear bits */
1.46 +mp_err mpl_parity(mp_int *a); /* determine parity */
1.47 +
1.48 +/* Get & Set the value of a bit */
1.49 +
1.50 +mp_err mpl_set_bit(mp_int *a, mp_size bitNum, mp_size value);
1.51 +mp_err mpl_get_bit(const mp_int *a, mp_size bitNum);
1.52 +mp_err mpl_get_bits(const mp_int *a, mp_size lsbNum, mp_size numBits);
1.53 +mp_err mpl_significant_bits(const mp_int *a);
1.54 +
1.55 +#endif /* end _H_MPLOGIC_ */
