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
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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 program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef SCI_ENGINE_SCRIPT_PATCHES_H
#define SCI_ENGINE_SCRIPT_PATCHES_H
#include "sci/sci.h"
namespace Sci {
#define SIG_END 0xFFFF
#define SIG_MISMATCH 0xFFFE
#define SIG_COMMANDMASK 0xF000
#define SIG_VALUEMASK 0x0FFF
#define SIG_BYTEMASK 0x00FF
#define SIG_MAGICDWORD 0xF000
#define SIG_ADDTOOFFSET 0xE000
#define SIG_SELECTOR16 0x9000
#define SIG_SELECTOR8 0x8000
#define SIG_UINT16 0x1000
#define SIG_BYTE 0x0000
#define PATCH_END SIG_END
#define PATCH_COMMANDMASK SIG_COMMANDMASK
#define PATCH_VALUEMASK SIG_VALUEMASK
#define PATCH_BYTEMASK SIG_BYTEMASK
#define PATCH_ADDTOOFFSET SIG_ADDTOOFFSET
#define PATCH_GETORIGINALBYTE 0xD000
#define PATCH_GETORIGINALBYTEADJUST 0xC000
#define PATCH_SELECTOR16 SIG_SELECTOR16
#define PATCH_SELECTOR8 SIG_SELECTOR8
#define PATCH_UINT16 SIG_UINT16
#define PATCH_BYTE SIG_BYTE
// defines maximum scratch area for getting original bytes from unpatched script data
#define PATCH_VALUELIMIT 4096
struct SciScriptPatcherEntry {
bool defaultActive;
// bool active;
uint16 scriptNr;
const char *description;
int16 applyCount;
// uint32 magicDWord;
// int magicOffset;
const uint16 *signatureData;
const uint16 *patchData;
};
//#define SCI_SIGNATUREENTRY_TERMINATOR { false, 0, NULL, 0, 0, 0, NULL, NULL }
#define SCI_SIGNATUREENTRY_TERMINATOR { false, 0, NULL, 0, NULL, NULL }
struct SciScriptPatcherRuntimeEntry {
bool active;
uint32 magicDWord;
int magicOffset;
};
/**
* ScriptPatcher class, handles on-the-fly patching of script data
*/
class ScriptPatcher {
public:
ScriptPatcher();
~ScriptPatcher();
void processScript(uint16 scriptNr, byte *scriptData, const uint32 scriptSize);
private:
void initSignature(SciScriptPatcherEntry *patchTable, bool isMacSci11);
void enablePatch(SciScriptPatcherEntry *patchTable, const char *searchDescription);
int32 findSignature(const SciScriptPatcherEntry *patchEntry, SciScriptPatcherRuntimeEntry *runtimeEntry, const byte *scriptData, const uint32 scriptSize, bool isMacSci11);
void applyPatch(const SciScriptPatcherEntry *patchEntry, byte *scriptData, const uint32 scriptSize, int32 signatureOffset, bool isMacSci11);
Selector *_selectorIdTable;
SciScriptPatcherRuntimeEntry *_runtimeTable;
};
} // End of namespace Sci
#endif // SCI_ENGINE_WORKAROUNDS_H
|
