| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: mpw.h,v 1.3 2004/04/08 01:36:15 mdw Exp $ |
| 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 | |
| 30 | #ifndef CATACOMB_MPW_H |
| 31 | #define CATACOMB_MPW_H |
| 32 | |
| 33 | #ifdef __cplusplus |
| 34 | extern "C" { |
| 35 | #endif |
| 36 | |
| 37 | /*----- Header files ------------------------------------------------------*/ |
| 38 | |
| 39 | #ifndef CATACOMB_BITS_H |
| 40 | # include <mLib/bits.h> |
| 41 | #endif |
| 42 | |
| 43 | #ifndef CATACOMB_MPTYPES_H |
| 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 |