aboutsummaryrefslogtreecommitdiff
path: root/engines/hugo/parser_v1w.cpp
blob: 9155942130e89c9268cbaac597aae1c0c9e6d2dd (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
/* 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.
 *
 * $URL$
 * $Id$
 *
 */

/*
 * This code is based on original Hugo Trilogy source code
 *
 * Copyright (c) 1989-1995 David P. Gray
 *
 */

// parser.c - handles all keyboard/command input

#include "common/system.h"

#include "hugo/hugo.h"
#include "hugo/parser.h"
#include "hugo/file.h"
#include "hugo/schedule.h"
#include "hugo/util.h"
#include "hugo/sound.h"
#include "hugo/object.h"

namespace Hugo {
Parser_v1w::Parser_v1w(HugoEngine *vm) : Parser(vm) {
}

Parser_v1w::~Parser_v1w() {
}

/**
* Test whether command line contains a verb allowed by this object.
* If it does, and the object is near and passes the tests in the command
* list then carry out the actions in the action list and return TRUE
*/
bool Parser_v1w::isObjectVerb(object_t *obj, char *comment) {
	debugC(1, kDebugParser, "isObjectVerb(object_t *obj, %s)", comment);

	// First, find matching verb in cmd list
	uint16 cmdIndex = obj->cmdIndex;                // ptr to list of commands
	if (cmdIndex == 0)                              // No commands for this obj
		return false;

	int i;
	for (i = 0; _vm->_cmdList[cmdIndex][i].verbIndex != 0; i++) {                 // For each cmd
		if (isWordPresent(_vm->_arrayVerbs[_vm->_cmdList[cmdIndex][i].verbIndex]))        // Was this verb used?
			break;
	}

	if (_vm->_cmdList[cmdIndex][i].verbIndex == 0)   // No verbs used.
		return false;

	// Verb match found.  Check if object is Near
	char *verb = *_vm->_arrayVerbs[_vm->_cmdList[cmdIndex][i].verbIndex];
	if (!isNear(obj, verb, comment))
		return false;

	// Check all required objects are being carried
	cmd *cmnd = &_vm->_cmdList[cmdIndex][i];         // ptr to struct cmd
	if (cmnd->reqIndex) {                           // At least 1 thing in list
		uint16 *reqs = _vm->_arrayReqs[cmnd->reqIndex];      // ptr to list of required objects
		for (i = 0; reqs[i]; i++) {                 // for each obj
			if (!_vm->_object->isCarrying(reqs[i])) {
				Utils::Box(BOX_ANY, "%s", _vm->_textData[cmnd->textDataNoCarryIndex]);
				return true;
			}
		}
	}

	// Required objects are present, now check state is correct
	if ((obj->state != cmnd->reqState) && (cmnd->reqState != DONT_CARE)) {
		Utils::Box(BOX_ANY, "%s", _vm->_textData[cmnd->textDataWrongIndex]);
		return true;
	}

	// Everything checked.  Change the state and carry out any actions
	if (cmnd->reqState != DONT_CARE)                // Don't change new state if required state didn't care
		obj->state = cmnd->newState;
	Utils::Box(BOX_ANY, "%s", _vm->_textData[cmnd->textDataDoneIndex]);
	_vm->_scheduler->insertActionList(cmnd->actIndex);

	// See if any additional generic actions
	if ((verb == _vm->_arrayVerbs[_vm->_look][0]) || (verb == _vm->_arrayVerbs[_vm->_take][0]) || (verb == _vm->_arrayVerbs[_vm->_drop][0]))
		isGenericVerb(obj, comment);
	return true;
}

/**
* Test whether command line contains one of the generic actions
*/
bool Parser_v1w::isGenericVerb(object_t *obj, char *comment) {
	debugC(1, kDebugParser, "isGenericVerb(object_t *obj, %s)", comment);

	if (!obj->genericCmd)
		return false;

	// Following is equivalent to switch, but couldn't do one
	if (isWordPresent(_vm->_arrayVerbs[_vm->_look]) && isNear(obj, _vm->_arrayVerbs[_vm->_look][0], comment)) {
		// Test state-dependent look before general look
		if ((obj->genericCmd & LOOK_S) == LOOK_S) {
			Utils::Box(BOX_ANY, "%s", _vm->_textData[obj->stateDataIndex[obj->state]]);
			warning("isGenericVerb: use of state dependant look - To be validated");
		} else {
			if ((LOOK & obj->genericCmd) == LOOK) {
				if (_vm->_textData[obj->dataIndex])
					Utils::Box(BOX_ANY, "%s", _vm->_textData[obj->dataIndex]);
				else
					return false;
			} else {
				Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBUnusual]);
			}
		}
	} else if (isWordPresent(_vm->_arrayVerbs[_vm->_take]) && isNear(obj, _vm->_arrayVerbs[_vm->_take][0], comment)) {
		if (obj->carriedFl)
			Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBHave]);
		else if ((TAKE & obj->genericCmd) == TAKE)
			takeObject(obj);
		else if (obj->cmdIndex != 0)                // No comment if possible commands
			return false;
		else if (!obj->verbOnlyFl && (TAKE & obj->genericCmd) == TAKE)  // Make sure not taking object in context!
			Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBNoUse]);
		else
			return false;
	} else if (isWordPresent(_vm->_arrayVerbs[_vm->_drop])) {
		if (!obj->carriedFl && ((DROP & obj->genericCmd) == DROP))
			Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBDontHave]);
		else if (obj->carriedFl && ((DROP & obj->genericCmd) == DROP))
			dropObject(obj);
		else if (obj->cmdIndex == 0)
			Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBNeed]);
		else
			return false;
	} else {                                        // It was not a generic cmd
		return false;
	}

	return true;
}

/**
* Test whether hero is close to object.  Return TRUE or FALSE
* If object not near, return suitable comment; may be another object close
* If radius is -1, treat radius as infinity
* Verb is included to determine correct comment if not near
*/
bool Parser_v1w::isNear(object_t *obj, char *verb, char *comment) {
	debugC(1, kDebugParser, "isNear(object_t *obj, %s, %s)", verb, comment);

	if (obj->carriedFl)                             // Object is being carried
		return true;

	if (obj->screenIndex != *_vm->_screen_p) {
		// Not in same screen
		if (obj->objValue)
			strcpy(comment, _vm->_textParser[kCmtAny1]);
		else
			strcpy(comment, _vm->_textParser[kCmtAny2]);
		return false;
	}

	if (obj->cycling == INVISIBLE) {
		if (obj->seqNumb) {
			// There is an image
			strcpy(comment, _vm->_textParser[kCmtAny3]);
			return false;
		} else {
			// No image, assume visible
			if ((obj->radius < 0) ||
			        ((abs(obj->x - _vm->_hero->x) <= obj->radius) &&
					(abs(obj->y - _vm->_hero->y - _vm->_hero->currImagePtr->y2) <= obj->radius))) {
				return true;
			} else {
				// User is not close enough
				if (obj->objValue && (verb != _vm->_arrayVerbs[_vm->_take][0]))
					strcpy(comment, _vm->_textParser[kCmtAny1]);
				else
					strcpy(comment, _vm->_textParser[kCmtClose]);
				return false;
			}
		}
	}

	if ((obj->radius < 0) ||
	    ((abs(obj->x - _vm->_hero->x) <= obj->radius) &&
	     (abs(obj->y + obj->currImagePtr->y2 - _vm->_hero->y - _vm->_hero->currImagePtr->y2) <= obj->radius))) {
		return true;
	} else {
		// User is not close enough
		if (obj->objValue && (verb != _vm->_arrayVerbs[_vm->_take][0]))
			strcpy(comment, _vm->_textParser[kCmtAny1]);
		else
			strcpy(comment, _vm->_textParser[kCmtClose]);
		return false;
	}
	return true;
}

/**
* Do all things necessary to carry an object
*/
void Parser_v1w::takeObject(object_t *obj) {
	debugC(1, kDebugParser, "takeObject(object_t *obj)");

	obj->carriedFl = true;
	if (obj->seqNumb) {                             // Don't change if no image to display
		obj->cycling = INVISIBLE;
	}
	_vm->adjustScore(obj->objValue);

	if (obj->seqNumb > 0)                               // If object has an image, force walk to dropped
		obj->viewx = -1;                                // (possibly moved) object next time taken!
	Utils::Box(BOX_ANY, TAKE_TEXT, _vm->_arrayNouns[obj->nounIndex][TAKE_NAME]);
}

/**
* Do all necessary things to drop an object
*/
void Parser_v1w::dropObject(object_t *obj) {
	debugC(1, kDebugParser, "dropObject(object_t *obj)");

	obj->carriedFl = false;
	obj->screenIndex = *_vm->_screen_p;
	if ((obj->seqNumb > 1) || (obj->seqList[0].imageNbr > 1))
		obj->cycling = CYCLE_FORWARD;
	else
		obj->cycling = NOT_CYCLING;
	obj->x = _vm->_hero->x - 1;
	obj->y = _vm->_hero->y + _vm->_hero->currImagePtr->y2 - 1;
	obj->y = (obj->y + obj->currImagePtr->y2 < YPIX) ? obj->y : YPIX - obj->currImagePtr->y2 - 10;
	_vm->adjustScore(-obj->objValue);
	Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBOk]);
}

/**
* Search for matching verbs in background command list.
* Noun is not required.  Return TRUE if match found
* Note that if the background command list has match set TRUE then do not
* print text if there are any recognizable nouns in the command line
*/
bool Parser_v1w::isCatchallVerb(objectList_t obj) {
	debugC(1, kDebugParser, "isCatchallVerb(object_list_t obj)");

	for (int i = 0; obj[i].verbIndex != 0; i++) {
		if (isWordPresent(_vm->_arrayVerbs[obj[i].verbIndex]) && obj[i].nounIndex == 0 &&
		   (!obj[i].matchFl || !findNoun()) &&
		   ((obj[i].roomState == DONT_CARE) ||
		    (obj[i].roomState == _vm->_screenStates[*_vm->_screen_p]))) {
			Utils::Box(BOX_ANY, "%s", _vm->_file->fetchString(obj[i].commentIndex));
			_vm->_scheduler->processBonus(obj[i].bonusIndex);

			// If this is LOOK (without a noun), show any takeable objects
			if (*(_vm->_arrayVerbs[obj[i].verbIndex]) == _vm->_arrayVerbs[_vm->_look][0])
				_vm->_object->showTakeables();

			return true;
		}
	}
	return false;
}

/**
* Search for matching verb/noun pairs in background command list
* Print text for possible background object.  Return TRUE if match found
*/
bool Parser_v1w::isBackgroundWord(objectList_t obj) {
	debugC(1, kDebugParser, "isBackgroundWord(object_list_t obj)");

	for (int i = 0; obj[i].verbIndex != 0; i++) {
		if (isWordPresent(_vm->_arrayVerbs[obj[i].verbIndex]) &&
		    isWordPresent(_vm->_arrayNouns[obj[i].nounIndex]) &&
		    ((obj[i].roomState == DONT_CARE) ||
		     (obj[i].roomState == _vm->_screenStates[*_vm->_screen_p]))) {
			Utils::Box(BOX_ANY, "%s", _vm->_file->fetchString(obj[i].commentIndex));
			_vm->_scheduler->processBonus(obj[i].bonusIndex);
			return true;
		}
	}
	return false;
}

/**
* Parse the user's line of text input.  Generate events as necessary
*/
void Parser_v1w::lineHandler() {
	debugC(1, kDebugParser, "lineHandler()");

	status_t &gameStatus = _vm->getGameStatus();

	// Toggle God Mode
	if (!strncmp(_line, "PPG", 3)) {
		_vm->_sound->playSound(!_vm->_soundTest, BOTH_CHANNELS, HIGH_PRI);
		gameStatus.godModeFl ^= 1;
		return;
	}

	Utils::strlwr(_line);                           // Convert to lower case

	// God Mode cheat commands:
	// goto <screen>                                Takes hero to named screen
	// fetch <object name>                          Hero carries named object
	// fetch all                                    Hero carries all possible objects
	// find <object name>                           Takes hero to screen containing named object
	if (gameStatus.godModeFl) {
		// Special code to allow me to go straight to any screen
		if (strstr(_line, "goto")) {
			for (int i = 0; i < _vm->_numScreens; i++) {
				if (!strcmp(&_line[strlen("goto") + 1], _vm->_screenNames[i])) {
					_vm->_scheduler->newScreen(i);
					return;
				}
			}
		}

		// Special code to allow me to get objects from anywhere
		if (strstr(_line, "fetch all")) {
			for (int i = 0; i < _vm->_object->_numObj; i++) {
				if (_vm->_object->_objects[i].genericCmd & TAKE)
					takeObject(&_vm->_object->_objects[i]);
			}
			return;
		}

		if (strstr(_line, "fetch")) {
			for (int i = 0; i < _vm->_object->_numObj; i++) {
				if (!strcmp(&_line[strlen("fetch") + 1], _vm->_arrayNouns[_vm->_object->_objects[i].nounIndex][0])) {
					takeObject(&_vm->_object->_objects[i]);
					return;
				}
			}
		}

		// Special code to allow me to goto objects
		if (strstr(_line, "find")) {
			for (int i = 0; i < _vm->_object->_numObj; i++) {
				if (!strcmp(&_line[strlen("find") + 1], _vm->_arrayNouns[_vm->_object->_objects[i].nounIndex][0])) {
					_vm->_scheduler->newScreen(_vm->_object->_objects[i].screenIndex);
					return;
				}
			}
		}
	}

	// Special meta commands
	// EXIT/QUIT
	if (!strcmp("exit", _line) || strstr(_line, "quit")) {
		Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBExit]);
		return;
	}

	// SAVE/RESTORE
	if (!strcmp("save", _line) && gameStatus.viewState == V_PLAY) {
		_vm->_file->saveGame(gameStatus.saveSlot, "Current game");
		return;
	}

	if (!strcmp("restore", _line) && (gameStatus.viewState == V_PLAY || gameStatus.viewState == V_IDLE)) {
		_vm->_file->restoreGame(gameStatus.saveSlot);
		_vm->_scheduler->restoreScreen(*_vm->_screen_p);
		gameStatus.viewState = V_PLAY;
		return;
	}

	// Empty line
	if (*_line == '\0')                             // Empty line
		return;
	if (strspn(_line, " ") == strlen(_line))        // Nothing but spaces!
		return;

	if (gameStatus.gameOverFl) {
		// No commands allowed!
		Utils::gameOverMsg();
		return;
	}

	char farComment[XBYTES * 5] = "";               // hold 5 line comment if object not nearby

	// Test for nearby objects referenced explicitly
	for (int i = 0; i < _vm->_object->_numObj; i++) {
		object_t *obj = &_vm->_object->_objects[i];
		if (isWordPresent(_vm->_arrayNouns[obj->nounIndex])) {
			if (isObjectVerb(obj, farComment) || isGenericVerb(obj, farComment))
				return;
		}
	}

	// Test for nearby objects that only require a verb
	// Note comment is unused if not near.
	for (int i = 0; i < _vm->_object->_numObj; i++) {
		object_t *obj = &_vm->_object->_objects[i];
		if (obj->verbOnlyFl) {
			char contextComment[XBYTES * 5] = "";   // Unused comment for context objects
			if (isObjectVerb(obj, contextComment) || isGenericVerb(obj, contextComment))
				return;
		}
	}

	// No objects match command line, try background and catchall commands
	if (isBackgroundWord(_vm->_backgroundObjects[*_vm->_screen_p]))
		return;
	if (isCatchallVerb(_vm->_backgroundObjects[*_vm->_screen_p]))
		return;
	if (isBackgroundWord(_vm->_catchallList))
		return;
	if (isCatchallVerb(_vm->_catchallList))
		return;

	// If a not-near comment was generated, print it
	if (*farComment != '\0') {
		Utils::Box(BOX_ANY, "%s", farComment);
		return;
	}

	// Nothing matches.  Report recognition success to user.
	char *verb = findVerb();
	char *noun = findNoun();
	if (verb == _vm->_arrayVerbs[_vm->_look][0] && _maze.enabledFl) {
		Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBMaze]);
		_vm->_object->showTakeables();
	} else if (verb && noun) {                      // A combination I didn't think of
		Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBNoPoint]);
	} else if (noun) {
		Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBNoun]);
	} else if (verb) {
		Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBVerb]);
	} else {
		Utils::Box(BOX_ANY, "%s", _vm->_textParser[kTBEh]);
	}
}

} // End of namespace Hugo