steghide  0.5.1
RandomSource.h
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1 /*
2  * steghide 0.5.1 - a steganography program
3  * Copyright (C) 1999-2003 Stefan Hetzl <shetzl@chello.at>
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License
7  * as published by the Free Software Foundation; either version 2
8  * of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18  *
19  */
20 
21 #ifndef SH_RANDOMSOURCE_H
22 #define SH_RANDOMSOURCE_H
23 
24 #include <cstdio>
25 #include <vector>
26 
27 class BitString ;
28 
33 class RandomSource {
34  public:
35  RandomSource (void) ;
36  ~RandomSource (void) ;
37 
42  BYTE getByte (void) ;
43 
49  std::vector<BYTE> getBytes (unsigned int n) ;
50 
56  BitString getBits (unsigned int n) ;
57 
62  bool getBool (void) ;
63 
69  unsigned long getValue (unsigned long n) ;
70 
71  private:
72  unsigned int RandomBytePos ;
78  FILE *RandomInput ;
79 } ;
80 
81 #endif // ndef SH_RANDOMSOURCE_H