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86 lines
3.3 KiB
C
86 lines
3.3 KiB
C
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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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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the MPI Arbitrary Precision Integer Arithmetic library.
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*
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* The Initial Developer of the Original Code is
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* Michael J. Fromberger.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* $Id: mplogic.h,v 1.7 2004/04/27 23:04:36 gerv%gerv.net Exp $ */
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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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mp_err mpl_significant_bits(const mp_int *a);
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#endif /* end _H_MPLOGIC_ */
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