aboutsummaryrefslogtreecommitdiff
path: root/engines/mads/conversations.cpp
blob: 469aaedb810d44dbdd3e06a0494260cc86925f0c (plain)
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
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
/* 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.
 *
 */

#include "mads/conversations.h"
#include "mads/mads.h"
#include "mads/compression.h"
#include "common/file.h"
#include "common/util.h"	// for Common::hexdump

namespace MADS {

GameConversations::GameConversations(MADSEngine *vm) : _vm(vm) {
	_runningConv = nullptr;
	_restoreRunning = 0;
	_playerEnabled = false;
	_inputMode = kInputBuildingSentences;
	_startFrameNumber = 0;
	_speakerVal = 0;
	_currentMode = CONVMODE_NONE;
	_priorMode = CONVMODE_NONE;
	_popupVisible = false;
	_verbId = 0;
	_vars = _nextStartNode = nullptr;
	_heroTrigger = 0;
	_heroTriggerMode = SEQUENCE_TRIGGER_PARSER;
	_interlocutorTrigger = 0;
	_interlocutorTriggerMode = SEQUENCE_TRIGGER_PARSER;
	_currentNode = 0;
	_dialogNodeOffset = _dialogNodeSize = 0;
	_dialog = nullptr;
	_dialogAltFlag = false;
	_personSpeaking = 0;

	// Mark all conversation slots as empty
	for (int idx = 0; idx < MAX_CONVERSATIONS; ++idx)
		_conversations[idx]._convId = -1;
}

GameConversations::~GameConversations() {
}

void GameConversations::load(int id) {
	// Scan through the conversation list for a free slot
	int slotIndex = -1;
	for (int idx = 0; idx < MAX_CONVERSATIONS && slotIndex == -1; ++idx) {
		if (_conversations[idx]._convId == -1)
			slotIndex = idx;
	}
	if (slotIndex == -1)
		error("Too many conversations loaded");

	// Set the conversation the slot will contain
	_conversations[slotIndex]._convId = id;

	// Load the conversation data
	Common::String cnvFilename = Common::String::format("CONV%03d.CNV", id);	
	_conversations[slotIndex]._data.load(cnvFilename);

	// Load the conversation's CND data
	Common::String cndFilename = Common::String::format("CONV%03d.CND", id);
	_conversations[slotIndex]._cnd.load(cndFilename);
}

ConversationEntry *GameConversations::getConv(int convId) {
	for (uint idx = 0; idx < MAX_CONVERSATIONS; ++idx) {
		if (_conversations[idx]._convId == convId)
			return &_conversations[idx];
	}

	return nullptr;
}

void GameConversations::run(int id) {
	// If another conversation is running, then stop it first
	if (_runningConv)
		stop();

	// Get the next conversation to run
	_runningConv = getConv(id);
	if (!_runningConv)
		error("Specified conversation %d not loaded", id);

	// Initialize needed fields
	_startFrameNumber = _vm->_events->getFrameCounter();
	_playerEnabled = _vm->_game->_player._stepEnabled;
	_inputMode = _vm->_game->_screenObjects._inputMode;
	_heroTrigger = 0;
	_interlocutorTrigger = 0;
	_popupVisible = false;
	_currentMode = CONVMODE_0;
	_verbId = -1;
	_speakerVal = 1;
	_personSpeaking = 1;

	// Initialize speaker arrays
	Common::fill(&_speakerActive[0], &_speakerActive[MAX_SPEAKERS], false);
	Common::fill(&_speakerSeries[0], &_speakerSeries[MAX_SPEAKERS], -1);
	Common::fill(&_speakerFrame[0], &_speakerFrame[MAX_SPEAKERS], 1);
	Common::fill(&_popupX[0], &_popupX[MAX_SPEAKERS], POPUP_CENTER);
	Common::fill(&_popupY[0], &_popupY[MAX_SPEAKERS], POPUP_CENTER);
	Common::fill(&_popupMaxLen[0], &_popupMaxLen[MAX_SPEAKERS], 30);

	// Start the conversation
	start();

	// Setup variables to point to data in the speaker arrays
	setVariable(2, &_speakerVal);
	for (int idx = 0; idx < MAX_SPEAKERS; ++idx) {
		setVariable(3 + idx, &_speakerFrame[idx]);
		setVariable(8 + idx, &_popupX[idx]);
		setVariable(13 + idx, &_popupY[idx]);
		setVariable(18 + idx, &_popupMaxLen[idx]);
	}

	// Load sprite data for speaker portraits
	for (uint idx = 0; idx < _runningConv->_data._speakerCount; ++idx) {
		const Common::String &portraitName = _runningConv->_data._portraits[idx];
		_speakerSeries[idx] = _vm->_game->_scene._sprites.addSprites(portraitName, PALFLAG_RESERVED);

		if (_speakerSeries[idx] > 0) {
			_speakerActive[idx] = true;
			_speakerFrame[idx] = _runningConv->_data._speakerFrame[idx];
		}
	}

	// Refresh colors if needed
	if (_vm->_game->_kernelMode == KERNEL_ACTIVE_CODE)
		_vm->_palette->refreshSceneColors();
}

void GameConversations::start() {
	assert(_runningConv->_cnd._vars.size() >= 2);
	_vars = &_runningConv->_cnd._vars[0];
	_nextStartNode = &_runningConv->_cnd._vars[1];

	_runningConv->_cnd._currentNode = -1;
	_runningConv->_cnd._numImports = 0;
	_runningConv->_cnd._vars[0].setValue(_nextStartNode->_val);

	// Store a reference to the variables list in the script handler for later reference
	ScriptEntry::Conditional::_vars = &_runningConv->_cnd._vars;
}

void GameConversations::setVariable(uint idx, int val) {
	if (active())
		_runningConv->_cnd._vars[idx].setValue(val);
}

void GameConversations::setVariable(uint idx, int *val) {
	if (active())
		_runningConv->_cnd._vars[idx].setValue(val);
}

void GameConversations::setStartNode(uint nodeIndex) {
	assert(_nextStartNode && _nextStartNode->_isPtr == false);
	_nextStartNode->_val = nodeIndex;
}

void GameConversations::stop() {
	// Only need to proceed if there is an active conversation
	if (!active())
		return;

	// Reset player enabled state if needed
	if (_vm->_game->_kernelMode == KERNEL_ACTIVE_CODE)
		_vm->_game->_player._stepEnabled = _playerEnabled;

	// Remove any visible dialog window
	removeActiveWindow();

	// Release any sprites used for character portraits
	for (int idx = 0; idx < _runningConv->_data._speakerCount; ++idx) {
		if (_speakerActive[idx])
			_vm->_game->_scene._sprites.remove(_speakerSeries[idx]);
	}

	// Flag conversation as no longer running
	_runningConv = nullptr;

	if (_inputMode == kInputConversation)
		_vm->_game->_scene._userInterface.emptyConversationList();

	_vm->_game->_scene._userInterface.setup(_inputMode);
}

void GameConversations::exportPointer(int *ptr) {
	// Only need to proceed if there is an active conversation
	if (!active())
		return;

	// Also don't proceed if the number of allowed imports has already been reached
	if (_runningConv->_cnd._numImports >= _runningConv->_data._maxImports)
		return;

	// Get the variable to use for this next import and set it's value
	int variableIndex = _runningConv->_cnd._importVariables[
		_runningConv->_cnd._numImports++];
	setVariable(variableIndex, ptr);
}

void GameConversations::exportValue(int val) {
	// Only need to proceed if there is an active conversation
	if (!active())
		return;

	// Also don't proceed if the number of allowed imports has already been reached
	if (_runningConv->_cnd._numImports >= _runningConv->_data._maxImports)
		return;

	// Get the variable to use for this next import and set it's value
	int variableIndex = _runningConv->_cnd._importVariables[
		_runningConv->_cnd._numImports++];
	setVariable(variableIndex, val);
}

void GameConversations::setHeroTrigger(int val) {
	_heroTrigger = val;
	_heroTriggerMode = _vm->_game->_triggerSetupMode;
}

void GameConversations::setInterlocutorTrigger(int val) {
	_interlocutorTrigger = val;
	_interlocutorTriggerMode = _vm->_game->_triggerSetupMode;
}

int *GameConversations::getVariable(int idx) {
	assert(idx >= 0);	// TODO: Some negative values are allowed? Investigate
	return _vars[idx].getValue();
}

void GameConversations::hold() {
	if (_currentMode != CONVMODE_NONE) {
		_priorMode = _currentMode;
		_currentMode = CONVMODE_NONE;
	}
}

void GameConversations::release() {
	if (_currentMode == CONVMODE_NONE) {
		_currentMode = _priorMode;
		if (_currentMode == 1 || _currentMode == 2)
			update(true);
	}
}

void GameConversations::flagEntry(DialogCommand mode, int entryIndex) {
	assert(_runningConv);
	uint &flags = _runningConv->_cnd._entryFlags[entryIndex];

	switch (mode) {
	case CMD_1:
		flags |= ENTRYFLAG_4000;
		flags &= ~ENTRYFLAG_8000;
		break;

	case CMD_HIDE:
		flags &= ~ENTRYFLAG_8000;
		break;

	case CMD_UNHIDE:
		if (!(flags & ENTRYFLAG_4000))
			flags |= ENTRYFLAG_8000;
		break;

	default:
		break;
	}
}

void GameConversations::reset(int id) {
	warning("TODO: GameConversations::reset");
}

void GameConversations::update(bool flag) {
	// Only need to proceed if there is an active conversation
	if (!active())
		return;

	ConversationVar &var0 = _runningConv->_cnd._vars[0];

	switch (_currentMode) {
	case CONVMODE_0:
		assert(var0.isNumeric());
		if (var0._val < 0) {
			if (_vm->_game->_scene._frameStartTime >= _startFrameNumber) {
				removeActiveWindow();
				if (_heroTrigger) {
					_vm->_game->_scene._action._activeAction._verbId = _verbId;
					_vm->_game->_trigger = _heroTrigger;
					_vm->_game->_triggerMode = _heroTriggerMode;
					_heroTrigger = 0;
				}

				_currentMode = CONVMODE_STOP;
			}
		} else {
			bool isActive = nextNode();
			_currentNode = var0._val;

			if (isActive) {
				_verbId = _runningConv->_data._nodes[_currentNode]._index;
				_vm->_game->_scene._action._activeAction._verbId = _verbId;
				_vm->_game->_scene._action._inProgress = true;
				_vm->_game->_scene._action._savedFields._commandError = false;
				_currentMode = CONVMODE_1;
			} else {
				_currentMode = generateMenu();
			}
		}
		break;

	case CONVMODE_1:
		if (flag)
			_currentMode = CONVMODE_3;
		break;

	case CONVMODE_2:
		if (flag) {
			_vm->_game->_player._stepEnabled = false;
			_verbId = _vm->_game->_scene._action._activeAction._verbId;

			if (!(_runningConv->_cnd._entryFlags[_verbId] & ENTRYFLAG_2))
				flagEntry(CMD_HIDE, _verbId);

			removeActiveWindow();
			_vm->_game->_scene._userInterface.emptyConversationList();
			_vm->_game->_scene._userInterface.setup(kInputConversation);
			_personSpeaking = 0;
			executeEntry(_verbId);

			ConvDialog &dialog = _runningConv->_data._dialogs[_verbId];
			if (dialog._speechIndex) {
				_runningConv->_cnd._messageList3.clear();
				_runningConv->_cnd._messageList3.push_back(dialog._speechIndex);
			}

			generateText(dialog._textLineIndex, _runningConv->_cnd._messageList3);
			_currentMode = CONVMODE_0;

			if (_heroTrigger) {
				_vm->_game->_scene._action._activeAction._verbId = _verbId;
				_vm->_game->_trigger = _heroTrigger;
				_vm->_game->_triggerMode = _heroTriggerMode;
				_heroTrigger = 0;
			}
		}
		break;

	case CONVMODE_3:
		if (_vm->_game->_scene._frameStartTime >= _startFrameNumber) {
			removeActiveWindow();
			_personSpeaking = 0;
			executeEntry(_verbId);
			generateMessage(_runningConv->_cnd._messageList1, _runningConv->_cnd._messageList3);
		
			if (_heroTrigger && _popupVisible) {
				_vm->_game->_scene._action._activeAction._verbId = _verbId;
				_vm->_game->_trigger = _heroTrigger;
				_vm->_game->_triggerMode = _heroTriggerMode;
				_heroTrigger = 0;
			}

			_currentMode = CONVMODE_4;
		}
		break;

	case CONVMODE_4:
		if (_vm->_game->_scene._frameStartTime >= _startFrameNumber) {
			removeActiveWindow();
			_personSpeaking = _speakerVal;

			generateMessage(_runningConv->_cnd._messageList2, _runningConv->_cnd._messageList4);

			if (_interlocutorTrigger && _popupVisible) {
				_vm->_game->_scene._action._activeAction._verbId = _verbId;
				_vm->_game->_trigger = _interlocutorTrigger;
				_vm->_game->_triggerMode = _interlocutorTriggerMode;
				_interlocutorTrigger = 0;
			}
		}
		break;

	case CONVMODE_STOP:
		stop();
		break;

	default:
		break;
	}

	warning("TODO: GameConversations::update");
}

void GameConversations::removeActiveWindow() {
	warning("TODO: GameConversations::removeActiveWindow");
}

ConversationMode GameConversations::generateMenu() {
	error("TODO: GameConversations::generateMenu");
}

void GameConversations::generateText(int textLineIndex, Common::Array<int> &messages) {
	_dialogAltFlag = true;

	error("TODO: GameConversations::generateText");
}

void GameConversations::generateMessage(Common::Array<int> &messageList, Common::Array<int> &voiceList) {
	_dialogAltFlag = false;
	if (messageList.size() == 0)
		return;

	if (_dialog)
		delete _dialog;

	// Get the speaker portrait
	SpriteAsset &sprites = *_vm->_game->_scene._sprites[_speakerSeries[_personSpeaking]];
	MSprite *portrait = sprites.getFrame(_speakerFrame[_personSpeaking]);

	// Create the new text dialog
	_dialog = new TextDialog(_vm, FONT_INTERFACE,
		Common::Point(_popupX[_personSpeaking], _popupY[_personSpeaking]), 
		portrait, _popupMaxLen[_personSpeaking]);

	// Add in the lines
	for (uint msgNum = 0; msgNum < messageList.size(); ++msgNum) {
		ConvMessage &msg = _runningConv->_data._messages[messageList[msgNum]];
		uint stringIndex = msg._stringIndex;

		for (uint strNum = 0; strNum < msg._count; ++strNum, ++stringIndex) {
			Common::String textLine = _runningConv->_data._textLines[stringIndex];
			textLine.trim();
			_dialog->addLine(textLine);
		}
	}

	// Show the dialog
	_popupVisible = true;
	_dialog->show();

	// Play the speech if one was provided
	if (voiceList.size() > 0) {
		_vm->_audio->setSoundGroup(_runningConv->_data._speechFile);
		_vm->_audio->playSound(voiceList[0] - 1);
	}
}

bool GameConversations::nextNode() {
	ConversationVar &var0 = _runningConv->_cnd._vars[0];
	_runningConv->_cnd._currentNode = var0._val;
	return _runningConv->_data._nodes[var0._val]._active;
}

int GameConversations::executeEntry(int index) {
	ConvDialog &dlg = _runningConv->_data._dialogs[index];
	ConversationVar &var0 = _runningConv->_cnd._vars[0];

	_runningConv->_cnd._messageList1.clear();
	_runningConv->_cnd._messageList2.clear();
	_runningConv->_cnd._messageList3.clear();
	_runningConv->_cnd._messageList4.clear();
	_nextStartNode->_val = var0._val;

	bool flag = true;
	for (uint scriptIdx = 0; scriptIdx < dlg._script.size() && flag; ) {
		ScriptEntry &scrEntry = dlg._script[scriptIdx];
		if (scrEntry._command == CMD_END)
			break;

		switch (scrEntry._command) {
		case CMD_1:
		case CMD_HIDE:
		case CMD_UNHIDE:
			for (uint idx = 0; scrEntry._entries.size(); ++idx)
				flagEntry(scrEntry._command, scrEntry._entries[idx]);
			break;

		case CMD_MESSAGE1:
		case CMD_MESSAGE2:
			scriptMessage(scrEntry);
			break;

		case CMD_ERROR:
			error("Conversation script generated error");
			break;

		case CMD_NODE:
			flag = !scriptNode(scrEntry);
			break;

		case CMD_GOTO: {
			bool gotoFlag = scrEntry._conditionals[0].evaluate();
			if (gotoFlag) {
				scriptIdx = scrEntry._index;
				continue;
			}
			break;
		}

		case CMD_ASSIGN: {
			bool setFlag = scrEntry._conditionals[0].evaluate();
			if (setFlag) {
				int *ptr = _runningConv->_cnd._vars[scrEntry._index].getValue();
				*ptr = scrEntry._conditionals[1].evaluate();
			}
			break;
		}

		default:
			error("Unknown script opcode");
		}

		++scriptIdx;
	}

	if (flag) {
		var0._val = -1;
	}

	return var0._val;
}

void GameConversations::scriptMessage(ScriptEntry &scrEntry) {
	// Check whether this operation should be done
	bool doFlag = scrEntry._conditionals[0].evaluate();
	if (!doFlag)
		return;

	// Figure out the entire range that messages can be selected from
	int total = 0;
	for (uint idx = 0; idx < scrEntry._entries2.size(); ++idx)
		total += scrEntry._entries2[idx]._size;

	// Choose a random entry from the list of possible values
	int randomVal = _vm->getRandomNumber(1, total);
	int randomIndex = -1;
	while (randomVal > 0 && randomIndex < (int)scrEntry._entries2.size()) {
		++randomIndex;
		randomVal -= scrEntry._entries2[randomIndex]._size;
	}
	if (randomIndex == (int)scrEntry._entries2.size())
		randomIndex = 0;
	int entryVal = scrEntry._entries2[randomIndex]._v2;

	if (scrEntry._command == CMD_MESSAGE1) {
		_runningConv->_cnd._messageList2.push_back(entryVal);

		if (scrEntry._entries2.size() <= 1) {
			for (uint idx = 0; idx < scrEntry._entries.size(); ++idx)
				_runningConv->_cnd._messageList4.push_back(scrEntry._entries[idx]);
		}
		else if (scrEntry._entries.size() > 0 && randomIndex < (int)scrEntry._entries.size()) {
			_runningConv->_cnd._messageList4.push_back(entryVal);
		}
	} else {
		_runningConv->_cnd._messageList1.push_back(entryVal);

		if (scrEntry._entries2.size() <= 1) {
			for (uint idx = 0; idx < scrEntry._entries.size(); ++idx)
				_runningConv->_cnd._messageList3.push_back(scrEntry._entries[idx]);
		} else if (scrEntry._entries.size() > 0 && randomIndex < (int)scrEntry._entries.size()) {
			_runningConv->_cnd._messageList3.push_back(entryVal);
		}
	}
}

bool GameConversations::scriptNode(ScriptEntry &scrEntry) {
	bool doFlag = scrEntry._conditionals[0].evaluate();
	if (!doFlag)
		return false;

	ConversationVar &var0 = _runningConv->_cnd._vars[0];
	int val1 = scrEntry._conditionals[1].evaluate();
	int val2 = scrEntry._conditionals[2].evaluate();

	var0._val = val1;
	if (val1 >= 0)
		_nextStartNode->_val = val1;
	else if (val2 >= 0)
		_nextStartNode->_val = val2;

	return true;
}

/*------------------------------------------------------------------------*/

void ConversationData::load(const Common::String &filename) {
	Common::File inFile;
	char buffer[16];

	inFile.open(filename);
	MadsPack convFileUnpacked(&inFile);

	// **** Section 0: Header *************************************************
	Common::SeekableReadStream *convFile = convFileUnpacked.getItemStream(0);

	_nodeCount = convFile->readUint16LE();
	_dialogCount = convFile->readUint16LE();
	_messageCount = convFile->readUint16LE();
	_textLineCount = convFile->readUint16LE();
	_unk2 = convFile->readUint16LE();
	_maxImports = convFile->readUint16LE();
	_speakerCount = convFile->readUint16LE();

	for (uint idx = 0; idx < MAX_SPEAKERS; ++idx) {
		convFile->read(buffer, 16);
		_portraits[idx] = buffer;
	}

	for (uint idx = 0; idx < MAX_SPEAKERS; ++idx) {
		_speakerFrame[idx] = convFile->readUint16LE();
	}

	convFile->read(buffer, 14);
	_speechFile = Common::String(buffer);

	// Total text length in section 5
	_textSize = convFile->readUint32LE();
	_commandsSize = convFile->readUint32LE();

	// The rest of the section 0 is padding to allow room for a set of pointers
	// to the contents of the remaining sections loaded into memory as a
	// continuous data block containing both the header and the sections
	delete convFile;

	// **** Section 1: Nodes **************************************************
	convFile = convFileUnpacked.getItemStream(1);

	_nodes.clear();
	for (uint i = 0; i < _nodeCount; i++) {
		ConvNode node;
		node._index = convFile->readUint16LE();
		node._dialogCount = convFile->readUint16LE();
		node._unk1 = convFile->readSint16LE();	// TODO
		node._active = convFile->readSint16LE() != 0;
		node._unk3 = convFile->readSint16LE();	// TODO
		_nodes.push_back(node);
	}

	delete convFile;

	// **** Section 2: Dialogs ************************************************
	convFile = convFileUnpacked.getItemStream(2);
	assert(convFile->size() == _dialogCount * 8);

	_dialogs.resize(_dialogCount);
	for (uint idx = 0; idx < _dialogCount; ++idx) {
		_dialogs[idx]._textLineIndex = convFile->readSint16LE();
		_dialogs[idx]._speechIndex = convFile->readSint16LE();
		_dialogs[idx]._scriptOffset = convFile->readUint16LE();
		_dialogs[idx]._scriptSize = convFile->readUint16LE();
	}

	delete convFile;

	// **** Section 3: Messages ***********************************************
	convFile = convFileUnpacked.getItemStream(3);
	assert(convFile->size() == _messageCount * 4);

	_messages.resize(_messageCount);
	for (uint idx = 0; idx < _messageCount; ++idx) {
		_messages[idx]._stringIndex = convFile->readUint16LE();
		_messages[idx]._count = convFile->readUint16LE();
	}

	delete convFile;

	// **** Section 4: Text line offsets **************************************
	convFile = convFileUnpacked.getItemStream(4);
	assert(convFile->size() == _textLineCount * 2);

	uint16 *textLineOffsets = new uint16[_textLineCount];	// deleted below in section 5
	for (uint16 i = 0; i < _textLineCount; i++)
		textLineOffsets[i] = convFile->readUint16LE();

	delete convFile;

	// **** Section 5: Text lines *********************************************
	convFile = convFileUnpacked.getItemStream(5);
	assert(convFile->size() == _textSize);

	Common::String textLine;
	_textLines.resize(_textLineCount);
	char textLineBuffer[256];
	uint16 nextOffset;
	for (uint16 i = 0; i < _textLineCount; i++) {
		nextOffset = (i != _textLineCount - 1) ? textLineOffsets[i + 1] : convFile->size();
		convFile->read(textLineBuffer, nextOffset - textLineOffsets[i]);
		_textLines[i] = Common::String(textLineBuffer);
	}

	delete[] textLineOffsets;
	delete convFile;

	// **** Section 6: Scripts ************************************************
	convFile = convFileUnpacked.getItemStream(6);
	assert(convFile->size() == _commandsSize);

	for (uint idx = 0; idx < _dialogs.size(); ++idx) {
		// Move to the correct position for the dialog's script, and create
		// a memory stream to represent the data for just that script
		convFile->seek(_dialogs[idx]._scriptOffset);
		Common::SeekableReadStream *scriptStream = convFile->readStream(_dialogs[idx]._scriptSize);

		// Pass it to the dialog's script set class to parse into commands
		_dialogs[idx]._script.load(*scriptStream, _dialogs[idx]._scriptOffset);
		delete scriptStream;
	}

	delete convFile;
	inFile.close();
}

/*------------------------------------------------------------------------*/

ConversationConditionals::ConversationConditionals() : _numImports(0) {
	_currentNode = -1;
}

void ConversationConditionals::load(const Common::String &filename) {
	Common::File inFile;
	Common::SeekableReadStream *convFile;

	// Open up the file for access
	inFile.open(filename);
	MadsPack convFileUnpacked(&inFile);

	// **** Section 0: Header *************************************************
	convFile = convFileUnpacked.getItemStream(0);

	_currentNode = convFile->readUint16LE();
	int entryFlagsCount = convFile->readUint16LE();
	int varsCount = convFile->readUint16LE();
	int importsCount = convFile->readUint16LE();

	convFile->skip(4);

	_messageList1.resize(convFile->readUint16LE());
	_messageList2.resize(convFile->readUint16LE());
	_messageList3.resize(convFile->readUint16LE());
	_messageList4.resize(convFile->readUint16LE());
	convFile->skip(20);

	for (uint idx = 0; idx < 10; ++idx) {
		int v = convFile->readUint16LE();
		if (idx < _messageList1.size())
			_messageList1[idx] = v;
	}
	for (uint idx = 0; idx < 10; ++idx) {
		int v = convFile->readUint16LE();
		if (idx < _messageList2.size())
			_messageList2[idx] = v;
	}
	for (uint idx = 0; idx < 10; ++idx) {
		int v = convFile->readUint16LE();
		if (idx < _messageList3.size())
			_messageList3[idx] = v;
	}
	for (uint idx = 0; idx < 10; ++idx) {
		int v = convFile->readUint16LE();
		if (idx < _messageList4.size())
			_messageList4[idx] = v;
	}

	delete convFile;

	// **** Section: Imports *************************************************
	int streamNum = 1;
	
	_importVariables.resize(importsCount);
	if (importsCount > 0) {
		convFile = convFileUnpacked.getItemStream(streamNum++);

		// Read in the variable indexes that each import value will be stored in
		for (int idx = 0; idx < importsCount; ++idx)
			_importVariables[idx] = convFile->readUint16LE();

		delete convFile;
	}

	// **** Section: Entry Flags *********************************************
	convFile = convFileUnpacked.getItemStream(streamNum++);
	assert(convFile->size() == (entryFlagsCount * 2));

	_entryFlags.resize(entryFlagsCount);
	for (int idx = 0; idx < entryFlagsCount; ++idx)
		_entryFlags[idx] = convFile->readUint16LE();

	delete convFile;

	// **** Section: Variables ***********************************************
	convFile = convFileUnpacked.getItemStream(streamNum);
	assert(convFile->size() == (varsCount * 6));

	_vars.resize(varsCount);
	for (int idx = 0; idx < varsCount; ++idx) {
		convFile->skip(2);	// Loaded values are never pointers, so don't need this
		_vars[idx]._isPtr = false;
		_vars[idx]._val = convFile->readSint16LE();
		convFile->skip(2);	// Unused segment selector for pointer values
	}

	delete convFile;
}

/*------------------------------------------------------------------------*/

void ConversationVar::setValue(int val) {
	_isPtr = false;
	_valPtr = nullptr;
	_val = val;
}

void ConversationVar::setValue(int *val) {
	_isPtr = true;
	_valPtr = val;
	_val = 0;
}

/*------------------------------------------------------------------------*/

void DialogScript::load(Common::SeekableReadStream &s, uint startingOffset) {
	clear();
	Common::HashMap<uint, uint> instructionOffsets;

	// Iterate getting each instruction in turn
	while (s.pos() < s.size()) {
		// Create a new entry for the next script command
		instructionOffsets[startingOffset + s.pos()] = size();
		push_back(ScriptEntry());
		ScriptEntry &se = (*this)[size() - 1];
		
		// Load the instruction
		se.load(s);
	}

	// Do a final iteration over the loaded instructions to convert
	// any GOTO instructions from original offsets to instruction indexes
	for (uint idx = 0; idx < size(); ++idx) {
		ScriptEntry &se = (*this)[idx];

		if (se._command == CMD_GOTO)
			se._index = instructionOffsets[se._index];
	}
}

/*------------------------------------------------------------------------*/

void ScriptEntry::load(Common::SeekableReadStream &s) {
	// Get the command byte
	_command = (DialogCommand)s.readByte();

	if (!(_command == CMD_DIALOG_END || (_command >= CMD_END && _command <= CMD_ASSIGN))) {
		warning("unknown opcode - %d", _command);
		s.seek(0, SEEK_END);
		return;
	}

	// Get in the conditional values
	int numConditionals = 1;
	if (_command == CMD_NODE)
		numConditionals = 3;
	else if (_command == CMD_ASSIGN)
		numConditionals = 2;
	else if (_command == CMD_ERROR)
		numConditionals = 0;

	for (int idx = 0; idx < numConditionals; ++idx)
		_conditionals[idx].load(s);

	// Get further parameters
	switch (_command) {
	case CMD_1:
	case CMD_HIDE:
	case CMD_UNHIDE: {
		// Read in the list of entries whose flags are to be updated
		int count = s.readByte();
		for (int idx = 0; idx < count; ++idx)
			_entries.push_back(s.readSint16LE());
		break;
	}

	case CMD_MESSAGE1:
	case CMD_MESSAGE2: {
		int count2 = s.readByte();
		int count1 = s.readByte();
		_entries2.resize(count2);
		_entries.resize(count1);

		for (uint idx = 0; idx < _entries2.size(); ++idx) {
			int v = s.readByte();
			if (idx < 10)
				_entries2[idx]._size = v;
		}
		for (uint idx = 0; idx < _entries2.size(); ++idx) {
			int v = s.readUint16LE();
			if (idx < 10)
				_entries2[idx]._v2 = v;
		}
		for (uint idx = 0; idx < _entries.size(); ++idx) {
			int v = s.readUint16LE();
			if (idx < 10)
				_entries[idx] = v;
		}
		break;
	}

	case CMD_ERROR:
	case CMD_NODE:
		// These opcodes have no extra parameters
		break;

	case CMD_GOTO:
	case CMD_ASSIGN:
		// Goto has a single extra parameter for the destination
		// Assign has a single extra parameter for the variable index
		//		that the value resulting from the condition will be set to
		_index = s.readUint16LE();
		break;

	default:
		break;
	}
}

/*------------------------------------------------------------------------*/

Common::Array<ConversationVar> *ScriptEntry::Conditional::_vars = nullptr;

void ScriptEntry::Conditional::load(Common::SeekableReadStream &s) {
	_operation = (ConditionalOperation)s.readUint16LE();

	if (_operation == CONDOP_ABORT) {
		_param1._isVariable = false;
		_param1._val = 0;
	} else {
		_param1._isVariable = s.readByte() != 0;
		_param1._val = s.readSint16LE();
	}

	if (_operation == CONDOP_ABORT || _operation == CONDOP_VALUE) {
		_param2._isVariable = false;
		_param2._val = 0;
	} else {
		_param2._isVariable = s.readByte() != 0;
		_param2._val = s.readSint16LE();
	}
}

int ScriptEntry::Conditional::evaluate() const {
	if (_operation == CONDOP_NONE)
		return -1;

	int param1 = get(1);
	if (_operation == CONDOP_VALUE)
		return param1;
	int param2 = get(2);

	switch (_operation) {
	case CONDOP_ADD:
		return param1 + param2;
	case CONDOP_SUBTRACT:
		return param1 - param2;
	case CONDOP_MULTIPLY:
		return param1 * param2;
	case CONDOP_DIVIDE:
		return param1 / param2;
	case CONDOP_MODULUS:
		return param1 % param2;
	case CONDOP_LTEQ:
		return (param1 <= param2) ? 1 : 0;
	case CONDOP_GTEQ:
		return (param1 < param2) ? 1 : 0;
	case CONDOP_LT:
		return (param1 < param2) ? 1 : 0;
	case CONDOP_GT:
		return (param1 > param2) ? 1 : 0;
	case CONDOP_NEQ:
		return (param1 != param2) ? 1 : 0;
	case CONDOP_EQ:
		return (param1 == param2) ? 1 : 0;
	case CONDOP_AND:
		return (param1 || param2) ? 1 : 0;
	case CONDOP_OR:
		return (param1 && param2) ? 1 : 0;
	default:
		error("Unknown conditional operation");
	}
}

int ScriptEntry::Conditional::get(int paramNum) const {
	const CondtionalParamEntry &p = (paramNum == 1) ? _param1 : _param2;
	return p._isVariable ? *(*_vars)[p._val].getValue() : p._val;
}

/*------------------------------------------------------------------------*/


} // End of namespace MADS