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
|
////////////////////////////////////////////////////////////////////////////////////////
//
// Nestopia - NES/Famicom emulator written in C++
//
// Copyright (C) 2003-2008 Martin Freij
//
// This file is part of Nestopia.
//
// Nestopia 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.
//
// Nestopia 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 Nestopia; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
////////////////////////////////////////////////////////////////////////////////////////
#include "NstAssert.hpp"
#include "NstChecksum.hpp"
#include "NstCrc32.hpp"
namespace Nes
{
namespace Core
{
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("s", on)
#endif
Checksum::Checksum()
: crc32(0) {}
Checksum::Checksum(const byte* data,dword size)
: crc32(0)
{
Compute( data, size );
}
void Checksum::Clear()
{
crc32 = 0;
sha1.Clear();
}
void Checksum::Compute(const byte* data,dword size)
{
crc32 = Crc32::Compute( data, size, crc32 );
Sha1::Compute( sha1, data, size );
}
void Checksum::Recompute(const byte* data,dword size)
{
Clear();
Compute( data, size );
}
bool Checksum::operator == (const Checksum& checksum) const
{
NST_VERIFY( (crc32 == checksum.crc32) == (sha1 == checksum.sha1) );
return crc32 == checksum.crc32 && sha1 == checksum.sha1;
}
bool Checksum::operator ! () const
{
NST_VERIFY( !crc32 == !sha1 );
return !crc32 && !sha1;
}
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("", on)
#endif
}
}
|
