1*5697Smcpowers /* 2*5697Smcpowers * mplogic.h 3*5697Smcpowers * 4*5697Smcpowers * Bitwise logical operations on MPI values 5*5697Smcpowers * 6*5697Smcpowers * ***** BEGIN LICENSE BLOCK ***** 7*5697Smcpowers * Version: MPL 1.1/GPL 2.0/LGPL 2.1 8*5697Smcpowers * 9*5697Smcpowers * The contents of this file are subject to the Mozilla Public License Version 10*5697Smcpowers * 1.1 (the "License"); you may not use this file except in compliance with 11*5697Smcpowers * the License. You may obtain a copy of the License at 12*5697Smcpowers * http://www.mozilla.org/MPL/ 13*5697Smcpowers * 14*5697Smcpowers * Software distributed under the License is distributed on an "AS IS" basis, 15*5697Smcpowers * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 16*5697Smcpowers * for the specific language governing rights and limitations under the 17*5697Smcpowers * License. 18*5697Smcpowers * 19*5697Smcpowers * The Original Code is the MPI Arbitrary Precision Integer Arithmetic library. 20*5697Smcpowers * 21*5697Smcpowers * The Initial Developer of the Original Code is 22*5697Smcpowers * Michael J. Fromberger. 23*5697Smcpowers * Portions created by the Initial Developer are Copyright (C) 1998 24*5697Smcpowers * the Initial Developer. All Rights Reserved. 25*5697Smcpowers * 26*5697Smcpowers * Contributor(s): 27*5697Smcpowers * 28*5697Smcpowers * Alternatively, the contents of this file may be used under the terms of 29*5697Smcpowers * either the GNU General Public License Version 2 or later (the "GPL"), or 30*5697Smcpowers * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), 31*5697Smcpowers * in which case the provisions of the GPL or the LGPL are applicable instead 32*5697Smcpowers * of those above. If you wish to allow use of your version of this file only 33*5697Smcpowers * under the terms of either the GPL or the LGPL, and not to allow others to 34*5697Smcpowers * use your version of this file under the terms of the MPL, indicate your 35*5697Smcpowers * decision by deleting the provisions above and replace them with the notice 36*5697Smcpowers * and other provisions required by the GPL or the LGPL. If you do not delete 37*5697Smcpowers * the provisions above, a recipient may use your version of this file under 38*5697Smcpowers * the terms of any one of the MPL, the GPL or the LGPL. 39*5697Smcpowers * 40*5697Smcpowers * ***** END LICENSE BLOCK ***** */ 41*5697Smcpowers /* 42*5697Smcpowers * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 43*5697Smcpowers * Use is subject to license terms. 44*5697Smcpowers * 45*5697Smcpowers * Sun elects to use this software under the MPL license. 46*5697Smcpowers */ 47*5697Smcpowers 48*5697Smcpowers #ifndef _MPLOGIC_H 49*5697Smcpowers #define _MPLOGIC_H 50*5697Smcpowers 51*5697Smcpowers #pragma ident "%Z%%M% %I% %E% SMI" 52*5697Smcpowers 53*5697Smcpowers /* $Id: mplogic.h,v 1.7 2004/04/27 23:04:36 gerv%gerv.net Exp $ */ 54*5697Smcpowers 55*5697Smcpowers #include "mpi.h" 56*5697Smcpowers 57*5697Smcpowers /* 58*5697Smcpowers The logical operations treat an mp_int as if it were a bit vector, 59*5697Smcpowers without regard to its sign (an mp_int is represented in a signed 60*5697Smcpowers magnitude format). Values are treated as if they had an infinite 61*5697Smcpowers string of zeros left of the most-significant bit. 62*5697Smcpowers */ 63*5697Smcpowers 64*5697Smcpowers /* Parity results */ 65*5697Smcpowers 66*5697Smcpowers #define MP_EVEN MP_YES 67*5697Smcpowers #define MP_ODD MP_NO 68*5697Smcpowers 69*5697Smcpowers /* Bitwise functions */ 70*5697Smcpowers 71*5697Smcpowers mp_err mpl_not(mp_int *a, mp_int *b); /* one's complement */ 72*5697Smcpowers mp_err mpl_and(mp_int *a, mp_int *b, mp_int *c); /* bitwise AND */ 73*5697Smcpowers mp_err mpl_or(mp_int *a, mp_int *b, mp_int *c); /* bitwise OR */ 74*5697Smcpowers mp_err mpl_xor(mp_int *a, mp_int *b, mp_int *c); /* bitwise XOR */ 75*5697Smcpowers 76*5697Smcpowers /* Shift functions */ 77*5697Smcpowers 78*5697Smcpowers mp_err mpl_rsh(const mp_int *a, mp_int *b, mp_digit d); /* right shift */ 79*5697Smcpowers mp_err mpl_lsh(const mp_int *a, mp_int *b, mp_digit d); /* left shift */ 80*5697Smcpowers 81*5697Smcpowers /* Bit count and parity */ 82*5697Smcpowers 83*5697Smcpowers mp_err mpl_num_set(mp_int *a, int *num); /* count set bits */ 84*5697Smcpowers mp_err mpl_num_clear(mp_int *a, int *num); /* count clear bits */ 85*5697Smcpowers mp_err mpl_parity(mp_int *a); /* determine parity */ 86*5697Smcpowers 87*5697Smcpowers /* Get & Set the value of a bit */ 88*5697Smcpowers 89*5697Smcpowers mp_err mpl_set_bit(mp_int *a, mp_size bitNum, mp_size value); 90*5697Smcpowers mp_err mpl_get_bit(const mp_int *a, mp_size bitNum); 91*5697Smcpowers mp_err mpl_get_bits(const mp_int *a, mp_size lsbNum, mp_size numBits); 92*5697Smcpowers mp_err mpl_significant_bits(const mp_int *a); 93*5697Smcpowers 94*5697Smcpowers #endif /* _MPLOGIC_H */ 95