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
|
/* 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.
*
* $URL$
* $Id$
*
*/
#ifndef KYRA_SCRIPT_H
#define KYRA_SCRIPT_H
#include "common/stream.h"
#include "common/func.h"
namespace Kyra {
struct ScriptState;
typedef Common::Functor1<ScriptState*, int> Opcode;
struct ScriptData {
byte *text;
uint16 *data;
uint16 *ordr;
uint16 dataSize;
const Common::Array<const Opcode*> *opcodes;
};
struct ScriptState {
uint16 *ip;
const ScriptData *dataPtr;
int16 retValue;
uint16 bp;
uint16 sp;
int16 regs[30]; // VM registers
int16 stack[61]; // VM stack
};
#define stackPos(x) (script->stack[script->sp+x])
#define stackPosString(x) ((const char*)&script->dataPtr->text[READ_BE_UINT16(&script->dataPtr->text[stackPos(x)<<1])])
#define FORM_CHUNK 0x4D524F46
#define TEXT_CHUNK 0x54584554
#define DATA_CHUNK 0x41544144
#define ORDR_CHUNK 0x5244524F
#define AVTL_CHUNK 0x4C545641
class Resource;
class KyraEngine;
class ScriptFileParser {
public:
ScriptFileParser() : _stream(0), _startOffset(0), _endOffset(0) {}
ScriptFileParser(const char *filename, Resource *res) : _stream(0), _startOffset(0), _endOffset(0) { setFile(filename, res); }
~ScriptFileParser() { destroy(); }
// 'script' must be allocated with new!
void setFile(const char *filename, Resource *res);
operator bool() const { return (_startOffset != _endOffset) && _stream; }
uint32 getFORMBlockSize();
uint32 getIFFBlockSize(const uint32 chunk);
bool loadIFFBlock(const uint32 chunk, void *loadTo, uint32 ptrSize);
private:
void destroy();
Common::SeekableReadStream *_stream;
uint32 _startOffset;
uint32 _endOffset;
};
class ScriptHelper {
public:
ScriptHelper(KyraEngine *vm);
bool loadScript(const char *filename, ScriptData *data, const Common::Array<const Opcode*> *opcodes);
void unloadScript(ScriptData *data);
void initScript(ScriptState *scriptState, const ScriptData *data);
bool startScript(ScriptState *script, int function);
bool validScript(ScriptState *script);
bool runScript(ScriptState *script);
protected:
KyraEngine *_vm;
int16 _parameter;
typedef void (ScriptHelper::*CommandProc)(ScriptState*);
struct CommandEntry {
CommandProc proc;
const char *desc;
};
const CommandEntry *_commands;
private:
void cmd_jmpTo(ScriptState*);
void cmd_setRetValue(ScriptState*);
void cmd_pushRetOrPos(ScriptState*);
void cmd_push(ScriptState*);
void cmd_pushReg(ScriptState*);
void cmd_pushBPNeg(ScriptState*);
void cmd_pushBPAdd(ScriptState*);
void cmd_popRetOrPos(ScriptState*);
void cmd_popReg(ScriptState*);
void cmd_popBPNeg(ScriptState*);
void cmd_popBPAdd(ScriptState*);
void cmd_addSP(ScriptState*);
void cmd_subSP(ScriptState*);
void cmd_execOpcode(ScriptState*);
void cmd_ifNotJmp(ScriptState*);
void cmd_negate(ScriptState*);
void cmd_eval(ScriptState*);
void cmd_setRetAndJmp(ScriptState*);
};
} // end of namespace Kyra
#endif
|
