| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: maurer.h,v 1.1 2000/06/17 11:29:49 mdw Exp $ |
| 4 | * |
| 5 | * Maurer's universal statistical test |
| 6 | * |
| 7 | * (c) 2000 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 | /*----- Revision history --------------------------------------------------* |
| 31 | * |
| 32 | * $Log: maurer.h,v $ |
| 33 | * Revision 1.1 2000/06/17 11:29:49 mdw |
| 34 | * Maurer's universal statistical test. |
| 35 | * |
| 36 | */ |
| 37 | |
| 38 | #ifndef CATACOMB_MAURER_H |
| 39 | #define CATACOMB_MAURER_H |
| 40 | |
| 41 | #ifdef __cplusplus |
| 42 | extern "C" { |
| 43 | #endif |
| 44 | |
| 45 | /*----- Header files ------------------------------------------------------*/ |
| 46 | |
| 47 | #include <mLib/bits.h> |
| 48 | |
| 49 | /*----- Functions provided ------------------------------------------------*/ |
| 50 | |
| 51 | /* --- @maurer@ --- * |
| 52 | * |
| 53 | * Arguments: @const octet *p@ = pointer to a buffer of data |
| 54 | * @size_t sz@ = size of the buffer |
| 55 | * @unsigned l@ = number of bits to take at a time |
| 56 | * |
| 57 | * Returns: The statistic %$Z_u = (X_u - \mu)/\sigma$%, which should be |
| 58 | * normally distributed with a mean of zero and standard |
| 59 | * deviation of 1. |
| 60 | * |
| 61 | * Use: Performs Maurer's universal statistical test on a buffer of |
| 62 | * data. You must ensure that the buffer size @sz@ is larger |
| 63 | * than %$11 l \cdot 2^l$% bits long, and ideally much larger. |
| 64 | * |
| 65 | * Note that, under Unix systems, this function requires the |
| 66 | * maths library. |
| 67 | */ |
| 68 | |
| 69 | extern double maurer(const octet */*p*/, size_t /*sz*/, unsigned /*l*/); |
| 70 | |
| 71 | /*----- That's all, folks -------------------------------------------------*/ |
| 72 | |
| 73 | #ifdef __cplusplus |
| 74 | } |
| 75 | #endif |
| 76 | |
| 77 | #endif |