3 * Very low-level multiprecision definitions
5 * (c) 1999 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
12 * Catacomb is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Library General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
17 * Catacomb is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
23 * License along with Catacomb; if not, write to the Free
24 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
28 #ifndef CATACOMB_MPW_H
29 #define CATACOMB_MPW_H
35 /*----- Header files ------------------------------------------------------*/
37 #ifndef CATACOMB_BITS_H
38 # include <mLib/bits.h>
41 #ifndef CATACOMB_MPTYPES_H
45 /*----- Useful macros -----------------------------------------------------*/
49 * Arguments: @x@ = an unsigned value
51 * Use: Expands to the value of @x@ masked and typecast to a
52 * multiprecision integer word.
55 #define MPW(x) ((mpw)((x) & MPW_MAX))
59 * Arguments: @n@ = number of words
61 * Use: Expands to the number of bytes occupied by a given number of
65 #define MPWS(n) ((n) * sizeof(mpw))
69 * Arguments: @sz@ = size of an octet array, in octets
71 * Use: Expands to the number of @mpw@ words required to represent
72 * the number held in the octet array.
75 #define MPW_RQ(sz) (((sz) * 8 + MPW_BITS - 1) / MPW_BITS)
77 /*----- That's all, folks -------------------------------------------------*/