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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
|
/* 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.
*
* $URL$
* $Id$
*
*/
#include "sci/sci.h"
#include "sci/resource.h"
#include "sci/engine/seg_manager.h"
#include "sci/engine/script.h"
#include "sci/engine/state.h"
#include "sci/engine/selector.h"
#include "sci/engine/kernel.h"
#include "common/file.h"
namespace Sci {
// Loads arbitrary resources of type 'restype' with resource numbers 'resnrs'
// This implementation ignores all resource numbers except the first one.
reg_t kLoad(EngineState *s, int argc, reg_t *argv) {
ResourceType restype = g_sci->getResMan()->convertResType(argv[0].toUint16());
int resnr = argv[1].toUint16();
// Request to dynamically allocate hunk memory for later use
if (restype == kResourceTypeMemory)
return s->_segMan->allocateHunkEntry("kLoad()", resnr);
return make_reg(0, ((restype << 11) | resnr)); // Return the resource identifier as handle
}
// Unloads an arbitrary resource of type 'restype' with resource numbber 'resnr'
// behaviour of this call didn't change between sci0->sci1.1 parameter wise, which means getting called with
// 1 or 3+ parameters is not right according to sierra sci
reg_t kUnLoad(EngineState *s, int argc, reg_t *argv) {
if (argc >= 2) {
ResourceType restype = g_sci->getResMan()->convertResType(argv[0].toUint16());
reg_t resnr = argv[1];
// WORKAROUND for a broken script in room 320 in Castle of Dr. Brain.
// Script 377 tries to free the hunk memory allocated for the saved area
// (underbits) beneath the pop up window, which results in having the
// window stay on screen even when it's closed. Ignore this request here.
if (restype == kResourceTypeMemory && g_sci->getGameId() == GID_CASTLEBRAIN &&
s->currentRoomNumber() == 320)
return s->r_acc;
if (restype == kResourceTypeMemory)
s->_segMan->freeHunkEntry(resnr);
}
return s->r_acc;
}
reg_t kLock(EngineState *s, int argc, reg_t *argv) {
int state = argc > 2 ? argv[2].toUint16() : 1;
ResourceType type = g_sci->getResMan()->convertResType(argv[0].toUint16());
ResourceId id = ResourceId(type, argv[1].toUint16());
Resource *which;
switch (state) {
case 1 :
g_sci->getResMan()->findResource(id, 1);
break;
case 0 :
if (id.getNumber() == 0xFFFF) {
// Unlock all resources of the requested type
Common::List<ResourceId> *resources = g_sci->getResMan()->listResources(type);
Common::List<ResourceId>::iterator itr = resources->begin();
while (itr != resources->end()) {
Resource *res = g_sci->getResMan()->testResource(*itr);
if (res->isLocked())
g_sci->getResMan()->unlockResource(res);
++itr;
}
delete resources;
} else {
which = g_sci->getResMan()->findResource(id, 0);
if (which)
g_sci->getResMan()->unlockResource(which);
else {
if (id.getType() == kResourceTypeInvalid)
warning("[resMan] Attempt to unlock resource %i of invalid type %i", id.getNumber(), type);
else
// Happens in CD games (e.g. LSL6CD) with the message
// resource. It isn't fatal, and it's usually caused
// by leftover scripts.
debugC(2, kDebugLevelResMan, "[resMan] Attempt to unlock non-existant resource %s", id.toString().c_str());
}
}
break;
}
return s->r_acc;
}
reg_t kResCheck(EngineState *s, int argc, reg_t *argv) {
Resource *res = NULL;
ResourceType restype = g_sci->getResMan()->convertResType(argv[0].toUint16());
if (restype == kResourceTypeVMD) {
char fileName[10];
sprintf(fileName, "%d.vmd", argv[1].toUint16());
return make_reg(0, Common::File::exists(fileName));
}
if ((restype == kResourceTypeAudio36) || (restype == kResourceTypeSync36)) {
if (argc >= 6) {
uint noun = argv[2].toUint16() & 0xff;
uint verb = argv[3].toUint16() & 0xff;
uint cond = argv[4].toUint16() & 0xff;
uint seq = argv[5].toUint16() & 0xff;
res = g_sci->getResMan()->testResource(ResourceId(restype, argv[1].toUint16(), noun, verb, cond, seq));
}
} else {
res = g_sci->getResMan()->testResource(ResourceId(restype, argv[1].toUint16()));
}
return make_reg(0, res != NULL);
}
reg_t kClone(EngineState *s, int argc, reg_t *argv) {
reg_t parent_addr = argv[0];
const Object *parent_obj = s->_segMan->getObject(parent_addr);
const bool parentIsClone = parent_obj->isClone();
reg_t clone_addr;
Clone *clone_obj; // same as Object*
if (!parent_obj) {
error("Attempt to clone non-object/class at %04x:%04x failed", PRINT_REG(parent_addr));
return NULL_REG;
}
debugC(2, kDebugLevelMemory, "Attempting to clone from %04x:%04x", PRINT_REG(parent_addr));
clone_obj = s->_segMan->allocateClone(&clone_addr);
if (!clone_obj) {
error("Cloning %04x:%04x failed-- internal error", PRINT_REG(parent_addr));
return NULL_REG;
}
// In case the parent object is a clone itself we need to refresh our
// pointer to it here. This is because calling allocateClone might
// invalidate all pointers, references and iterators to data in the clones
// segment.
//
// The reason why it might invalidate those is, that the segement code
// (Table) uses Common::Array for internal storage. Common::Array now
// might invalidate references to its contained data, when it has to
// extend the internal storage size.
if (parentIsClone)
parent_obj = s->_segMan->getObject(parent_addr);
*clone_obj = *parent_obj;
// Mark as clone
clone_obj->markAsClone(); // sets bit 0 of -info- selector
clone_obj->setSpeciesSelector(clone_obj->getPos());
if (parent_obj->isClass())
clone_obj->setSuperClassSelector(parent_obj->getPos());
s->_segMan->getScript(parent_obj->getPos().segment)->incrementLockers();
s->_segMan->getScript(clone_obj->getPos().segment)->incrementLockers();
return clone_addr;
}
extern void _k_view_list_mark_free(EngineState *s, reg_t off);
reg_t kDisposeClone(EngineState *s, int argc, reg_t *argv) {
reg_t obj = argv[0];
Clone *object = s->_segMan->getObject(obj);
if (!object) {
error("Attempt to dispose non-class/object at %04x:%04x",
PRINT_REG(obj));
return s->r_acc;
}
// SCI uses this technique to find out, if it's a clone and if it's supposed to get freed
// At least kq4early relies on this behaviour. The scripts clone "Sound", then set bit 1 manually
// and call kDisposeClone later. In that case we may not free it, otherwise we will run into issues
// later, because kIsObject would then return false and Sound object wouldn't get checked.
uint16 infoSelector = readSelectorValue(s->_segMan, obj, SELECTOR(_info_));
if ((infoSelector & 3) == kInfoFlagClone)
object->markAsFreed();
return s->r_acc;
}
// Returns script dispatch address index in the supplied script
reg_t kScriptID(EngineState *s, int argc, reg_t *argv) {
int script = argv[0].toUint16();
uint16 index = (argc > 1) ? argv[1].toUint16() : 0;
if (argv[0].segment)
return argv[0];
SegmentId scriptSeg = s->_segMan->getScriptSegment(script, SCRIPT_GET_LOAD);
if (!scriptSeg)
return NULL_REG;
Script *scr = s->_segMan->getScript(scriptSeg);
if (!scr->getExportsNr()) {
// This is normal. Some scripts don't have a dispatch (exports) table,
// and this call is probably used to load them in memory, ignoring
// the return value. If only one argument is passed, this call is done
// only to load the script in memory. Thus, don't show any warning,
// as no return value is expected. If an export is requested, then
// it will most certainly fail with OOB access.
if (argc == 2)
error("Script 0x%x does not have a dispatch table and export %d "
"was requested from it", script, index);
return NULL_REG;
}
if (index > scr->getExportsNr()) {
error("Dispatch index too big: %d > %d", index, scr->getExportsNr());
return NULL_REG;
}
uint16 address = scr->validateExportFunc(index);
// Point to the heap for SCI1.1+ games
if (getSciVersion() >= SCI_VERSION_1_1)
address += scr->getScriptSize();
return make_reg(scriptSeg, address);
}
reg_t kDisposeScript(EngineState *s, int argc, reg_t *argv) {
int script = argv[0].offset;
SegmentId id = s->_segMan->getScriptSegment(script);
Script *scr = s->_segMan->getScriptIfLoaded(id);
if (scr) {
if (s->_executionStack.back().addr.pc.segment != id)
scr->setLockers(1);
}
s->_segMan->uninstantiateScript(script);
if (argc != 2) {
return s->r_acc;
} else {
// This exists in the KQ5CD and GK1 interpreter. We know it is used
// when GK1 starts up, before the Sierra logo.
warning("kDisposeScript called with 2 parameters, still untested");
return argv[1];
}
}
reg_t kIsObject(EngineState *s, int argc, reg_t *argv) {
if (argv[0].offset == SIGNAL_OFFSET) // Treated specially
return NULL_REG;
else
return make_reg(0, s->_segMan->isHeapObject(argv[0]));
}
reg_t kRespondsTo(EngineState *s, int argc, reg_t *argv) {
reg_t obj = argv[0];
int selector = argv[1].toUint16();
return make_reg(0, s->_segMan->isHeapObject(obj) && lookupSelector(s->_segMan, obj, selector, NULL, NULL) != kSelectorNone);
}
} // End of namespace Sci
|