/usr/include/ETL/_random.h is in etl-dev 0.04.17-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | /*! ========================================================================
** Extended Template and Library
** Random Number Generator Class Implementation
** $Id$
**
** Copyright (c) 2002 Robert B. Quattlebaum Jr.
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of
** the License, or (at your option) any later version.
**
** This package is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
**
** === N O T E S ===========================================================
**
** This is an internal header file, included by other ETL headers.
** You should not attempt to use it directly.
**
** ========================================================================= */
/* === S T A R T =========================================================== */
#ifndef __ETL__RANDOM_H
#define __ETL__RANDOM_H
/* === H E A D E R S ======================================================= */
/* === M A C R O S ========================================================= */
/* === C L A S S E S & S T R U C T S ======================================= */
_ETL_BEGIN_NAMESPACE
/*
class rand_source_xor
{
public:
typedef int seed_type;
typedef short value_type;
private:
short entropy_pool[256];
int pool_index;
public:
random()
{
seed(0);
mod=offset=0;
}
void seed(const seed_type &x)
{ pool_index=0; }
void add_entropy(value_type entropy)
{
int i;
for(i=0;i<POOL_SIZE;i++)
entropy^=(entropy_pool[i]^=entropy*i);
}
void add_entropy(const value_type *entropy, int size)
{
}
short get_short()
{
if(pool_index>POOL_SIZE)
pool_index=0;
if(mod)
return entropy_pool[pool_index++]%mod+offset;
return entropy_pool[pool_index++];
}
};
*/
template <class T,int POOL_SIZE=256>
class random
{
public:
typedef T value_type;
typedef int seed_type;
private:
value_type entropy_pool[POOL_SIZE];
int pool_index;
value_type mod,offset;
public:
random()
{
seed(0);
mod=offset=0;
}
void seed(const seed_type &x __attribute__ ((unused)))
{ pool_index=0; }
void set_range(const value_type &floor,const value_type &ceil)
{ mod=ceil-floor; offset=floor; }
void set_range(const value_type &ceil)
{ mod=ceil; }
void add_entropy(value_type entropy)
{
int i;
for(i=0;i<POOL_SIZE;i++)
entropy^=(entropy_pool[i]^=entropy*i);
}
void add_entropy(const char *entropy)
{
}
value_type operator()(void)
{
if(pool_index>POOL_SIZE)
pool_index=0;
if(mod)
return entropy_pool[pool_index++]%mod+offset;
return entropy_pool[pool_index++];
}
};
/* === T Y P E D E F S ===================================================== */
_ETL_END_NAMESPACE
/* === E N D =============================================================== */
#endif
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