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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 |