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
|
/*
* scrambledfile.h
* Encrypted file class definition
* Copyright (C) 2005 Christopher Han <xiphux@gmail.com>
*
* This file is part of hpiutil2.
*
* hpiutil2 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.
*
* hpiutil2 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.
*
* You should have received a copy of the GNU General Public License
* along with hpiutil2; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef HPIUTIL2_SCRAMBLEDFILE_H
#define HPIUTIL2_SCRAMBLEDFILE_H
#include <string>
#include <fstream>
#include <boost/cstdint.hpp>
/*
* Performance mods
* Bitwise is generally faster, but disable
* if you're having problems
*/
#define MODS
#ifdef MODS
#define bitmin(x,y) ((y)+(((x)-(y))&-((x)<(y))))
#define bitmax(x,y) ((x)-(((x)-(y))&-((x)<(y))))
#define bitdiv(n,d) ((n)>>(d))
#define bitmod(n,d) ((n)&((1<<(d))-1))
#else
#define bitmin(x,y) (x<y?x:y)
#define bitmax(x,y) (x>y?x:y)
#define bitdiv(n,d) ((n)/(1<<(d)))
#define bitmod(n,d) ((n)%(1<<(d)))
#endif
namespace hpiutil
{
class scrambledfile
{
public:
bool scrambled;
boost::uint32_t key;
scrambledfile(const char *fname);
scrambledfile(std::string const &fname);
~scrambledfile();
boost::uint32_t read();
boost::uint32_t read(boost::uint8_t *buf);
boost::uint32_t read(boost::uint8_t *buf,const boost::uint32_t off, const boost::uint32_t len);
boost::uint32_t readint();
std::string readstring();
void seek(const boost::uint32_t pos);
void setkey(const boost::uint32_t k);
std::fstream file;
};
}
#endif /* HPIUTIL2_SCRAMBLEDFILE_H */
|
