2015-10-21 05:03:22 +02:00
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/*
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* mplogic.h
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*
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* Bitwise logical operations on MPI values
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*
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2018-05-04 16:08:28 +02:00
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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2015-10-21 05:03:22 +02:00
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#ifndef _H_MPLOGIC_
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#define _H_MPLOGIC_
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#include "mpi.h"
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/*
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The logical operations treat an mp_int as if it were a bit vector,
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without regard to its sign (an mp_int is represented in a signed
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magnitude format). Values are treated as if they had an infinite
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string of zeros left of the most-significant bit.
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*/
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/* Parity results */
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#define MP_EVEN MP_YES
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#define MP_ODD MP_NO
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/* Bitwise functions */
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mp_err mpl_not(mp_int *a, mp_int *b); /* one's complement */
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mp_err mpl_and(mp_int *a, mp_int *b, mp_int *c); /* bitwise AND */
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mp_err mpl_or(mp_int *a, mp_int *b, mp_int *c); /* bitwise OR */
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mp_err mpl_xor(mp_int *a, mp_int *b, mp_int *c); /* bitwise XOR */
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/* Shift functions */
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mp_err mpl_rsh(const mp_int *a, mp_int *b, mp_digit d); /* right shift */
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mp_err mpl_lsh(const mp_int *a, mp_int *b, mp_digit d); /* left shift */
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/* Bit count and parity */
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mp_err mpl_num_set(mp_int *a, int *num); /* count set bits */
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mp_err mpl_num_clear(mp_int *a, int *num); /* count clear bits */
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mp_err mpl_parity(mp_int *a); /* determine parity */
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/* Get & Set the value of a bit */
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mp_err mpl_set_bit(mp_int *a, mp_size bitNum, mp_size value);
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mp_err mpl_get_bit(const mp_int *a, mp_size bitNum);
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mp_err mpl_get_bits(const mp_int *a, mp_size lsbNum, mp_size numBits);
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cherry-picked mozilla NSS upstream changes (to rev bad5fd065fa1, which is on par with 3.20):
bug1001332, 56b691c003ad, bug1086145, bug1054069, bug1155922, bug991783, bug1125025, bug1162521, bug1162644, bug1132941, bug1164364, bug1166205, bug1166163, bug1166515, bug1138554, bug1167046, bug1167043, bug1169451, bug1172128, bug1170322, bug102794, bug1128184, bug557830, bug1174648, bug1180244, bug1177784, bug1173413, bug1169174, bug1084669, bug951455, bug1183395, bug1177430, bug1183827, bug1160139, bug1154106, bug1142209, bug1185033, bug1193467, bug1182667(with sha512 changes backed out, which breaks VC6 compilation), bug1158489, bug337796
2018-07-12 15:44:51 +02:00
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mp_size mpl_significant_bits(const mp_int *a);
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2015-10-21 05:03:22 +02:00
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#endif /* end _H_MPLOGIC_ */
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