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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: mpw.h,v 1.3 2004/04/08 01:36:15 mdw Exp $ |
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4 | * |
5 | * Very low-level multiprecision definitions |
6 | * |
7 | * (c) 1999 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
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. |
18 | * |
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. |
23 | * |
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, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
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30 | #ifndef CATACOMB_MPW_H |
31 | #define CATACOMB_MPW_H |
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32 | |
33 | #ifdef __cplusplus |
34 | extern "C" { |
35 | #endif |
36 | |
37 | /*----- Header files ------------------------------------------------------*/ |
38 | |
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39 | #ifndef CATACOMB_BITS_H |
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40 | # include <mLib/bits.h> |
41 | #endif |
42 | |
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43 | #ifndef CATACOMB_MPTYPES_H |
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44 | # include "mptypes.h" |
45 | #endif |
46 | |
47 | /*----- Useful macros -----------------------------------------------------*/ |
48 | |
49 | /* --- @MPW@ --- * |
50 | * |
51 | * Arguments: @x@ = an unsigned value |
52 | * |
53 | * Use: Expands to the value of @x@ masked and typecast to a |
54 | * multiprecision integer word. |
55 | */ |
56 | |
57 | #define MPW(x) ((mpw)((x) & MPW_MAX)) |
58 | |
59 | /* --- @MPWS@ --- * |
60 | * |
61 | * Arguments: @n@ = number of words |
62 | * |
63 | * Use: Expands to the number of bytes occupied by a given number of |
64 | * words. |
65 | */ |
66 | |
67 | #define MPWS(n) ((n) * sizeof(mpw)) |
68 | |
69 | /* --- @MPW_RQ@ --- * |
70 | * |
71 | * Arguments: @sz@ = size of an octet array, in octets |
72 | * |
73 | * Use: Expands to the number of @mpw@ words required to represent |
74 | * the number held in the octet array. |
75 | */ |
76 | |
77 | #define MPW_RQ(sz) (((sz) * 8 + MPW_BITS - 1) / MPW_BITS) |
78 | |
79 | /*----- That's all, folks -------------------------------------------------*/ |
80 | |
81 | #ifdef __cplusplus |
82 | } |
83 | #endif |
84 | |
85 | #endif |