3 * $Id: mpw.h,v 1.3 2004/04/08 01:36:15 mdw Exp $
5 * Very low-level multiprecision definitions
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 #ifndef CATACOMB_MPW_H
31 #define CATACOMB_MPW_H
37 /*----- Header files ------------------------------------------------------*/
39 #ifndef CATACOMB_BITS_H
40 # include <mLib/bits.h>
43 #ifndef CATACOMB_MPTYPES_H
47 /*----- Useful macros -----------------------------------------------------*/
51 * Arguments: @x@ = an unsigned value
53 * Use: Expands to the value of @x@ masked and typecast to a
54 * multiprecision integer word.
57 #define MPW(x) ((mpw)((x) & MPW_MAX))
61 * Arguments: @n@ = number of words
63 * Use: Expands to the number of bytes occupied by a given number of
67 #define MPWS(n) ((n) * sizeof(mpw))
71 * Arguments: @sz@ = size of an octet array, in octets
73 * Use: Expands to the number of @mpw@ words required to represent
74 * the number held in the octet array.
77 #define MPW_RQ(sz) (((sz) * 8 + MPW_BITS - 1) / MPW_BITS)
79 /*----- That's all, folks -------------------------------------------------*/