aboutsummaryrefslogtreecommitdiff
path: root/engines/sci/parser/said.y
blob: 08c0f0169e31e1d932e3e943513ae952bcb91727 (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
%{
/* 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/engine/state.h"


// Bison generates an empty switch statement that gives a warning in MSVC.
// This disables that warning.
#ifdef _MSC_VER
#pragma warning(disable:4065)
#endif


namespace Sci {

#define SAID_BRANCH_NULL 0

#define MAX_SAID_TOKENS 128

// Maximum number of words to be expected in a parsed sentence
#define AUGMENT_MAX_WORDS 64


#define ANYWORD 0xfff

#define WORD_TYPE_BASE 0x141
#define WORD_TYPE_REF 0x144
#define WORD_TYPE_SYNTACTIC_SUGAR 0x145

#define AUGMENT_SENTENCE_PART_BRACKETS 0x152

// Minor numbers
#define AUGMENT_SENTENCE_MINOR_MATCH_PHRASE 0x14c
#define AUGMENT_SENTENCE_MINOR_MATCH_WORD 0x153
#define AUGMENT_SENTENCE_MINOR_RECURSE 0x144
#define AUGMENT_SENTENCE_MINOR_PARENTHESES 0x14f


#undef YYDEBUG /*1*/
//#define SAID_DEBUG*/
//#define SCI_DEBUG_PARSE_TREE_AUGMENTATION // uncomment to debug parse tree augmentation


#ifdef SCI_DEBUG_PARSE_TREE_AUGMENTATION
#define scidprintf printf
#else
void print_nothing(...) { }
#define scidprintf print_nothing
#endif


static char *said_parse_error;

static int said_token;
static int said_tokens_nr;
static int said_tokens[MAX_SAID_TOKENS];
static int said_blessed;  // increminated by said_top_branch

static int said_tree_pos; // Set to 0 if we're out of space
#define SAID_TREE_START 4; // Reserve space for the 4 top nodes

#define VALUE_IGNORE -424242

static parse_tree_node_t said_tree[VOCAB_TREE_NODES];

typedef int wgroup_t;
typedef int tree_t;
typedef int said_spec_t;

static tree_t said_aug_branch(int, int, tree_t, tree_t);
static tree_t said_attach_branch(tree_t, tree_t);
/*
static tree_t said_wgroup_branch(wgroup_t);
*/
static said_spec_t said_top_branch(tree_t);
static tree_t said_paren(tree_t, tree_t);
static tree_t said_value(int, tree_t);
static tree_t said_terminal(int);

static int yylex();

static int yyerror(const char *s) {
	said_parse_error = strdup(s);
	return 1; /* Abort */
}

%}

%token WGROUP /* Word group */
%token YY_COMMA     /* 0xf0 */
%token YY_AMP       /* 0xf1 */
%token YY_SLASH     /* 0xf2 */
%token YY_PARENO    /* 0xf3 */
%token YY_PARENC    /* 0xf4 */
%token YY_BRACKETSO /* 0xf5 */
%token YY_BRACKETSC /* 0xf6 */
%token YY_HASH      /* 0xf7 */
%token YY_LT        /* 0xf8 */
%token YY_GT        /* 0xf9 */
%token YY_BRACKETSO_LT /* special token used to imitate LR(2) behaviour */
%token YY_BRACKETSO_SLASH /* special token used to imitate LR(2) behaviour */
%token YY_LT_BRACKETSO /* special token used to imitate LR(2) behaviour */
%token YY_LT_PARENO /* special token used to imitate LR(2) behaviour */

%%

saidspec :	  leftspec optcont
			{ $$ = said_top_branch(said_attach_branch($1, $2)); }
		| leftspec midspec optcont
			{ $$ = said_top_branch(said_attach_branch($1, said_attach_branch($2, $3))); }
		| leftspec midspec rightspec optcont
			{ $$ = said_top_branch(said_attach_branch($1, said_attach_branch($2, said_attach_branch($3, $4)))); }
		;


optcont :	 /* empty */
			{ $$ = SAID_BRANCH_NULL; }
		| YY_GT
			{ $$ = said_paren(said_value(0x14b, said_value(0xf900, said_terminal(0xf900))), SAID_BRANCH_NULL); }
		;



leftspec :	/* empty */
			{ $$ = SAID_BRANCH_NULL; }
		| YY_BRACKETSO expr YY_BRACKETSC
			{ $$ = said_aug_branch(0x152, 0x141, said_aug_branch(0x141, 0x149, $2, SAID_BRANCH_NULL), SAID_BRANCH_NULL); }
		| YY_BRACKETSO expr YY_BRACKETSC cwordrefset
			{ $$ = said_aug_branch(0x141, 0x149, said_attach_branch(said_aug_branch(0x152, 0x141, $2, SAID_BRANCH_NULL), $4), SAID_BRANCH_NULL); }
		| expr
			{ $$ = said_paren(said_value(0x141, said_value(0x149, $1)), SAID_BRANCH_NULL); }
		;



midspec :	 YY_SLASH expr
			{ $$ = said_aug_branch(0x142, 0x14a, $2, SAID_BRANCH_NULL); }
		| YY_SLASH YY_BRACKETSO expr YY_BRACKETSC
			{ $$ = said_aug_branch(0x142, 0x14a, $3, SAID_BRANCH_NULL); }
		| YY_SLASH YY_BRACKETSO expr YY_BRACKETSC cwordrefset
			{ $$ = said_aug_branch(0x142, 0x14a, said_attach_branch(said_aug_branch(0x152, 0x142, $3, SAID_BRANCH_NULL), $5), SAID_BRANCH_NULL); }
		| YY_BRACKETSO_SLASH YY_SLASH expr YY_BRACKETSC
			{ $$ = said_aug_branch(0x152, 0x142, said_aug_branch(0x142, 0x14a, $3, SAID_BRANCH_NULL), SAID_BRANCH_NULL); }
		| YY_SLASH
			{ $$ = SAID_BRANCH_NULL; }
		;



rightspec :	 YY_SLASH expr
			{ $$ = said_aug_branch(0x143, 0x14a, $2, SAID_BRANCH_NULL); }
		| YY_SLASH YY_BRACKETSO expr YY_BRACKETSC
			{ $$ = said_aug_branch(0x143, 0x14a, $3, SAID_BRANCH_NULL); }
		| YY_SLASH YY_BRACKETSO expr YY_BRACKETSC cwordrefset
			{ $$ = said_aug_branch(0x143, 0x14a, said_attach_branch(said_aug_branch(0x152, 0x143, $3, SAID_BRANCH_NULL), $5), SAID_BRANCH_NULL); }
		| YY_BRACKETSO_SLASH YY_SLASH expr YY_BRACKETSC
			{ $$ = said_aug_branch(0x152, 0x143, said_aug_branch(0x143, 0x14a, $3, SAID_BRANCH_NULL), SAID_BRANCH_NULL); }
		| YY_SLASH
			{ $$ = SAID_BRANCH_NULL; }
		;


word :		 WGROUP
			{ $$ = said_paren(said_value(0x141, said_value(0x153, said_terminal($1))), SAID_BRANCH_NULL); }
		;


wordset :	 word
			{ $$ = $1; }
		| YY_PARENO expr YY_PARENC
			{ $$ = said_aug_branch(0x141, 0x14c, $2, SAID_BRANCH_NULL); }
		| wordset YY_COMMA wordset
			{ $$ = said_attach_branch($1, $3); }
		| wordset YY_COMMA YY_BRACKETSO wordset YY_BRACKETSC
			{ $$ = said_attach_branch($1, $3); } // CHECKME
		;


expr :	wordset cwordrefset
			{ $$ = said_attach_branch(said_aug_branch(0x141, 0x14f, $1, SAID_BRANCH_NULL), $2); }
		| wordset
			{ $$ = said_aug_branch(0x141, 0x14f, $1, SAID_BRANCH_NULL); }
		| cwordrefset
			{ $$ = $1; }
		;


cwordrefset :	 wordrefset
			{ $$ = $1; }
		| YY_BRACKETSO_LT wordrefset YY_BRACKETSC
			{ $$ = said_aug_branch(0x152, 0x144, $2, SAID_BRANCH_NULL); }
		| wordrefset YY_BRACKETSO_LT wordrefset YY_BRACKETSC
			{ $$ = said_attach_branch($1, said_aug_branch(0x152, 0x144, $3, SAID_BRANCH_NULL)); }
		;


wordrefset :	YY_LT word recref
			{ $$ = said_aug_branch(0x144, 0x14f, $2, $3); }
		| YY_LT_PARENO YY_PARENO expr YY_PARENC
		{ $$ = said_aug_branch(0x144, 0x14f, $3, SAID_BRANCH_NULL); }
		| YY_LT wordset
			{ $$ = said_aug_branch(0x144, 0x14f, $2, SAID_BRANCH_NULL); }
		| YY_LT_BRACKETSO YY_BRACKETSO wordset YY_BRACKETSC
			{ $$ = said_aug_branch(0x144, 0x14f, $3, SAID_BRANCH_NULL); }
		;


recref :	YY_LT wordset recref
			{ $$ = said_aug_branch(0x141, 0x144, said_aug_branch(0x144, 0x14f, $2, SAID_BRANCH_NULL), $3); }
		| YY_LT wordset
			{ $$ = said_aug_branch(0x141, 0x144, said_aug_branch(0x144, 0x14f, $2, SAID_BRANCH_NULL), SAID_BRANCH_NULL); }
		| YY_LT_PARENO YY_PARENO expr YY_PARENC
		{ $$ = said_aug_branch(0x141, 0x14c, $2, SAID_BRANCH_NULL); }
		;

%%

int parse_yy_token_lookup[] = {YY_COMMA, YY_AMP, YY_SLASH, YY_PARENO, YY_PARENC, YY_BRACKETSO, YY_BRACKETSC, YY_HASH, YY_LT, YY_GT};

static int yylex() {
	int retval = said_tokens[said_token++];

	if (retval < SAID_LONG(SAID_FIRST)) {
		yylval = retval;
		retval = WGROUP;
	} else {
		retval >>= 8;

		if (retval == SAID_TERM)
			retval = 0;
		else {
			assert(retval >= SAID_FIRST);
			retval = parse_yy_token_lookup[retval - SAID_FIRST];
			if (retval == YY_BRACKETSO) {
				if ((said_tokens[said_token] >> 8) == SAID_LT)
					retval = YY_BRACKETSO_LT;
				else
					if ((said_tokens[said_token] >> 8) == SAID_SLASH)
						retval = YY_BRACKETSO_SLASH;
			} else if (retval == YY_LT && (said_tokens[said_token] >> 8) == SAID_BRACKO) {
				retval = YY_LT_BRACKETSO;
			} else if (retval == YY_LT && (said_tokens[said_token] >> 8) == SAID_PARENO) {
				retval = YY_LT_PARENO;
			}
		}
	}

	return retval;
}

static int said_next_node() {
	return ((said_tree_pos == 0) || (said_tree_pos >= VOCAB_TREE_NODES)) ? said_tree_pos = 0 : said_tree_pos++;
}

#define SAID_NEXT_NODE said_next_node()

static int said_leaf_node(tree_t pos, int value) {
	said_tree[pos].type = kParseTreeLeafNode;

	if (value != VALUE_IGNORE)
		said_tree[pos].content.value = value;

	return pos;
}

static int said_branch_node(tree_t pos, int left, int right) {
	said_tree[pos].type = kParseTreeBranchNode;

	if (left != VALUE_IGNORE)
		said_tree[pos].content.branches[0] = left;

	if (right != VALUE_IGNORE)
		said_tree[pos].content.branches[1] = right;

	return pos;
}

static tree_t said_paren(tree_t t1, tree_t t2) {
	if (t1)
		return said_branch_node(SAID_NEXT_NODE, t1, t2);
	else
		return t2;
}

static tree_t said_value(int val, tree_t t) {
	return said_branch_node(SAID_NEXT_NODE, said_leaf_node(SAID_NEXT_NODE, val), t);

}

static tree_t said_terminal(int val) {
	return said_leaf_node(SAID_NEXT_NODE, val);
}

static tree_t said_aug_branch(int n1, int n2, tree_t t1, tree_t t2) {
	int retval;

	retval = said_branch_node(SAID_NEXT_NODE,
				said_branch_node(SAID_NEXT_NODE,
					said_leaf_node(SAID_NEXT_NODE, n1),
						said_branch_node(SAID_NEXT_NODE,
							said_leaf_node(SAID_NEXT_NODE, n2),
						t1)
					),
				t2);

#ifdef SAID_DEBUG
	fprintf(stderr, "AUG(0x%x, 0x%x, [%04x], [%04x]) = [%04x]\n", n1, n2, t1, t2, retval);
#endif

	return retval;
}

static tree_t said_attach_branch(tree_t base, tree_t attacheant) {
#ifdef SAID_DEBUG
	fprintf(stderr, "ATT2([%04x], [%04x]) = [%04x]\n", base, attacheant, base);
#endif

	if (!attacheant)
		return base;
	if (!base)
		return attacheant;

	if (!base)
		return 0; // Happens if we're out of space

	said_branch_node(base, VALUE_IGNORE, attacheant);

	return base;
}

static said_spec_t said_top_branch(tree_t first) {
#ifdef SAID_DEBUG
	fprintf(stderr, "TOP([%04x])\n", first);
#endif
	said_branch_node(0, 1, 2);
	said_leaf_node(1, 0x141); // Magic number #1
	said_branch_node(2, 3, first);
	said_leaf_node(3, 0x13f); // Magic number #2

	++said_blessed;

	return 0;
}

static int said_parse_spec(byte *spec) {
	int nextitem;

	said_parse_error = NULL;
	said_token = 0;
	said_tokens_nr = 0;
	said_blessed = 0;

	said_tree_pos = SAID_TREE_START;

	do {
		nextitem = *spec++;
		if (nextitem < SAID_FIRST)
			said_tokens[said_tokens_nr++] = nextitem << 8 | *spec++;
		else
			said_tokens[said_tokens_nr++] = SAID_LONG(nextitem);

	} while ((nextitem != SAID_TERM) && (said_tokens_nr < MAX_SAID_TOKENS));

	if (nextitem == SAID_TERM)
		yyparse();
	else {
		warning("SAID spec is too long");
		return 1;
	}

	if (said_parse_error) {
		warning("Error while parsing SAID spec: %s", said_parse_error);
		free(said_parse_error);
		return 1;
	}

	if (said_tree_pos == 0) {
		warning("Out of tree space while parsing SAID spec");
		return 1;
	}

	if (said_blessed != 1) {
		warning("Found multiple top branches");
		return 1;
	}

	return 0;
}

/**********************/
/**** Augmentation ****/
/**********************/

// primitive functions

#define AUG_READ_BRANCH(a, br, p) \
	if (tree[p].type != kParseTreeBranchNode) \
		return 0; \
	a = tree[p].content.branches[br];

#define AUG_READ_VALUE(a, p) \
	if (tree[p].type != kParseTreeLeafNode) \
		return 0; \
	a = tree[p].content.value;

#define AUG_ASSERT(i) \
	if (!i) return 0;

static int aug_get_next_sibling(parse_tree_node_t *tree, int pos, int *first, int *second) {
	// Returns the next sibling relative to the specified position in 'tree',
	// sets *first and *second to its augment node values, returns the new position
	// or 0 if there was no next sibling
	int seek, valpos;

	AUG_READ_BRANCH(pos, 1, pos);
	AUG_ASSERT(pos);
	AUG_READ_BRANCH(seek, 0, pos);
	AUG_ASSERT(seek);

	// Now retrieve first value
	AUG_READ_BRANCH(valpos, 0, seek);
	AUG_ASSERT(valpos);
	AUG_READ_VALUE(*first, valpos);

	// Get second value
	AUG_READ_BRANCH(seek, 1, seek);
	AUG_ASSERT(seek);
	AUG_READ_BRANCH(valpos, 0, seek);
	AUG_ASSERT(valpos);
	AUG_READ_VALUE(*second, valpos);

	return pos;
}

static int aug_get_wgroup(parse_tree_node_t *tree, int pos) {
	// Returns 0 if pos in tree is not the root of a 3-element list, otherwise
	// it returns the last element (which, in practice, is the word group
	int val;

	AUG_READ_BRANCH(pos, 0, pos);
	AUG_ASSERT(pos);
	AUG_READ_BRANCH(pos, 1, pos);
	AUG_ASSERT(pos);
	AUG_READ_BRANCH(pos, 1, pos);
	AUG_ASSERT(pos);
	AUG_READ_VALUE(val, pos);

	return val;
}

static int aug_get_base_node(parse_tree_node_t *tree) {
	int startpos = 0;
	AUG_READ_BRANCH(startpos, 1, startpos);

	return startpos;
}

// semi-primitive functions

static int aug_get_first_child(parse_tree_node_t *tree, int pos, int *first, int *second) {
	// like aug_get_next_sibling, except that it recurses into the tree and
	// finds the first child (usually *not* Ayanami Rei) of the current branch
	// rather than its next sibling.
	AUG_READ_BRANCH(pos, 0, pos);
	AUG_ASSERT(pos);
	AUG_READ_BRANCH(pos, 1, pos);
	AUG_ASSERT(pos);

	return aug_get_next_sibling(tree, pos, first, second);
}

static void aug_find_words_recursively(parse_tree_node_t *tree, int startpos, int *base_words, int *base_words_nr,
			   int *ref_words, int *ref_words_nr, int maxwords, int refbranch) {
	// Finds and lists all base (141) and reference (144) words */
	int major, minor;
	int word;
	int pos = aug_get_first_child(tree, startpos, &major, &minor);

	//if (major == WORD_TYPE_REF)
	//	refbranch = 1;

	while (pos) {
		if ((word = aug_get_wgroup(tree, pos))) { // found a word
			if (!refbranch && major == WORD_TYPE_BASE) {
				if ((*base_words_nr) == maxwords) {
					warning("Out of regular words");
					return; // return gracefully
				}

				base_words[*base_words_nr] = word; // register word
				++(*base_words_nr);

			}
			if (major == WORD_TYPE_REF || refbranch) {
				if ((*ref_words_nr) == maxwords) {
					warning("Out of reference words");
					return; // return gracefully
				}

				ref_words[*ref_words_nr] = word; // register word
				++(*ref_words_nr);

			}
			if (major != WORD_TYPE_SYNTACTIC_SUGAR && major != WORD_TYPE_BASE && major != WORD_TYPE_REF)
				warning("aug_find_words_recursively(): Unknown word type %03x", major);

		} else // Did NOT find a word group: Attempt to recurse
			aug_find_words_recursively(tree, pos, base_words, base_words_nr,
						   ref_words, ref_words_nr, maxwords, refbranch || major == WORD_TYPE_REF);

		pos = aug_get_next_sibling(tree, pos, &major, &minor);
	}
}


static void aug_find_words(parse_tree_node_t *tree, int startpos, int *base_words, int *base_words_nr,
				int *ref_words, int *ref_words_nr, int maxwords) {
	// initializing wrapper for aug_find_words_recursively()
	*base_words_nr = 0;
	*ref_words_nr = 0;

	aug_find_words_recursively(tree, startpos, base_words, base_words_nr, ref_words, ref_words_nr, maxwords, 0);
}


static int aug_contains_word(int *list, int length, int word) {
	int i;

	if (word == ANYWORD)
		return (length);

	for (i = 0; i < length; i++)
		if (list[i] == word)
			return 1;

	return 0;
}


static int augment_sentence_expression(parse_tree_node_t *saidt, int augment_pos, parse_tree_node_t *parset,
					int parse_branch, int major, int minor, int *base_words, int base_words_nr,
					int *ref_words, int ref_words_nr);

static int augment_match_expression_p(parse_tree_node_t *saidt, int augment_pos, parse_tree_node_t *parset,
					int parse_basepos, int major, int minor,
			   int *base_words, int base_words_nr, int *ref_words, int ref_words_nr) {
	int cmajor, cminor, cpos;
	cpos = aug_get_first_child(saidt, augment_pos, &cmajor, &cminor);
	if (!cpos) {
		warning("augment_match_expression_p(): Empty condition");
		return 1;
	}

	scidprintf("Attempting to match (%03x %03x (%03x %03x\n", major, minor, cmajor, cminor);

	if ((major == WORD_TYPE_BASE) && (minor == AUGMENT_SENTENCE_MINOR_RECURSE))
		return augment_match_expression_p(saidt, cpos, parset, parse_basepos, cmajor, cminor,
						  base_words, base_words_nr, ref_words, ref_words_nr);

	switch (major) {

	case WORD_TYPE_BASE:

		// Iterate over children, and succeed if ANY child matches

		while (cpos) {
			if (cminor == AUGMENT_SENTENCE_MINOR_MATCH_WORD) {
				int word = aug_get_wgroup(saidt, cpos);
				scidprintf("Looking for word %03x\n", word);

				if (aug_contains_word(base_words, base_words_nr, word))
					return 1;
			} else if (cminor == AUGMENT_SENTENCE_MINOR_MATCH_PHRASE) {
				if (augment_sentence_expression(saidt, cpos, parset, parse_basepos, cmajor, cminor,
								base_words, base_words_nr, ref_words, ref_words_nr))
					return 1;
			} else if (cminor == AUGMENT_SENTENCE_MINOR_PARENTHESES) {
				int gc_major, gc_minor;
				int gchild = aug_get_first_child(saidt, cpos, &gc_major, &gc_minor);

				while (gchild) {
					if (augment_match_expression_p(saidt, cpos, parset, parse_basepos, major,
									minor, base_words, base_words_nr,
								       ref_words, ref_words_nr))
						return 1;
					gchild = aug_get_next_sibling(saidt, gchild, &gc_major, &gc_minor);
				}
			} else
				warning("augment_match_expression_p(): Unknown type 141 minor number %3x", cminor);

			cpos = aug_get_next_sibling(saidt, cpos, &cmajor, &cminor);

		}
		break;

	case WORD_TYPE_REF:
		while (cpos) {
			if (cminor == AUGMENT_SENTENCE_MINOR_MATCH_WORD) {
				int word = aug_get_wgroup(saidt, cpos);
				scidprintf("Looking for refword %03x\n", word);

				if (aug_contains_word(ref_words, ref_words_nr, word))
					return 1;
			} else if (cminor == AUGMENT_SENTENCE_MINOR_MATCH_PHRASE) {
				if (augment_match_expression_p(saidt, cpos, parset, parse_basepos, cmajor, cminor,
							       base_words, base_words_nr, ref_words, ref_words_nr))
					return 1;
			} else if (cminor == AUGMENT_SENTENCE_MINOR_PARENTHESES) {
				int gc_major, gc_minor;
				int gchild = aug_get_first_child(saidt, cpos, &gc_major, &gc_minor);

				while (gchild) {
					if (augment_match_expression_p(saidt, cpos, parset, parse_basepos, major,
									minor, base_words, base_words_nr,
									ref_words, ref_words_nr))
						return 1;
					gchild = aug_get_next_sibling(saidt, gchild, &gc_major, &gc_minor);
				}
			} else
				warning("augment_match_expression_p(): Unknown type 144 minor number %3x", cminor);

			cpos = aug_get_next_sibling(saidt, cpos, &cmajor, &cminor);

		}
		break;

	case AUGMENT_SENTENCE_PART_BRACKETS:
		if (augment_match_expression_p(saidt, cpos, parset, parse_basepos, cmajor, cminor,
					       base_words, base_words_nr, ref_words, ref_words_nr))
			return 1;

		scidprintf("Didn't match subexpression; checking sub-bracked predicate %03x\n", cmajor);

		switch (cmajor) {
		case WORD_TYPE_BASE:
			if (!base_words_nr)
				return 1;
			break;

		case WORD_TYPE_REF:
			if (!ref_words_nr)
				return 1;
			break;

		default:
			warning("augment_match_expression_p(): (subp1) Unkonwn sub-bracket predicate %03x", cmajor);
		}

		break;

	default:
		warning("augment_match_expression_p(): Unknown predicate %03x", major);

	}

	scidprintf("augment_match_expression_p(): Generic failure\n");

	return 0;
}

static int augment_sentence_expression(parse_tree_node_t *saidt, int augment_pos, parse_tree_node_t *parset,
					int parse_branch, int major, int minor, int *base_words, int base_words_nr,
					int *ref_words, int ref_words_nr) {
	int check_major, check_minor;
	int check_pos = aug_get_first_child(saidt, augment_pos, &check_major, &check_minor);

	// Iterate over all children of the said node, and succeed if they ALL match

	do {
		if (!(augment_match_expression_p(saidt, check_pos, parset, parse_branch, check_major, check_minor,
						base_words, base_words_nr, ref_words, ref_words_nr)))
			return 0;
	} while ((check_pos = aug_get_next_sibling(saidt, check_pos, &check_major, &check_minor)));

	return 1;
}

static int augment_sentence_part(parse_tree_node_t *saidt, int augment_pos, parse_tree_node_t *parset, int parse_basepos, int major, int minor) {
	int pmajor, pminor;
	int parse_branch = parse_basepos;
	int optional = 0;
	int foundwords = 0;

	scidprintf("Augmenting (%03x %03x\n", major, minor);

	if (major == AUGMENT_SENTENCE_PART_BRACKETS) { // '[/ foo]' is true if '/foo' or if there
						       // exists no x for which '/x' is true
		if ((augment_pos = aug_get_first_child(saidt, augment_pos, &major, &minor))) {
			scidprintf("Optional part: Now augmenting (%03x %03x\n", major, minor);
			optional = 1;
		} else {
			scidprintf("Matched empty optional expression\n");
			return 1;
		}
	}

	if ((major < 0x141) || (major > 0x143)) {
		scidprintf("augment_sentence_part(): Unexpected sentence part major number %03x\n", major);
		return 0;
	}


	// Iterative over the parse tree to find ANY matching subtree of the
	// right major type.

	while ((parse_branch = aug_get_next_sibling(parset, parse_branch, &pmajor, &pminor))) {
		if (pmajor == major) { // found matching sentence part
			int success;
			int base_words_nr;
			int ref_words_nr;
			int base_words[AUGMENT_MAX_WORDS];
			int ref_words[AUGMENT_MAX_WORDS];
#ifdef SCI_DEBUG_PARSE_TREE_AUGMENTATION
			int i;
#endif

			scidprintf("Found match with pminor = %03x\n", pminor);
			aug_find_words(parset, parse_branch, base_words, &base_words_nr, ref_words, &ref_words_nr, AUGMENT_MAX_WORDS);
			foundwords |= (ref_words_nr | base_words_nr);
#ifdef SCI_DEBUG_PARSE_TREE_AUGMENTATION
			printf("%d base words:", base_words_nr);
			for (i = 0; i < base_words_nr; i++)
				printf(" %03x", base_words[i]);
			printf("\n%d reference words:", ref_words_nr);
			for (i = 0; i < ref_words_nr; i++)
				printf(" %03x", ref_words[i]);
			printf("\n");
#endif

			success = augment_sentence_expression(saidt, augment_pos, parset, parse_basepos, major, minor,
							      base_words, base_words_nr, ref_words, ref_words_nr);

			if (success) {
				scidprintf("SUCCESS on augmenting (%03x %03x\n", major, minor);
				return 1;
			}
		}
	}

	if (optional && (foundwords == 0)) {
		scidprintf("Found no words and optional branch => SUCCESS on augmenting (%03x %03x\n", major, minor);
		return 1;
	}
	scidprintf("FAILURE on augmenting (%03x %03x\n", major, minor);

	return 0;
}

static int augment_parse_nodes(parse_tree_node_t *parset, parse_tree_node_t *saidt) {
	int augment_basepos = 0;
	int parse_basepos;
	int major, minor;
	int dontclaim = 0;

	parse_basepos = aug_get_base_node(parset);
	if (!parse_basepos) {
		warning("augment_parse_nodes(): Parse tree is corrupt");
		return 0;
	}

	augment_basepos = aug_get_base_node(saidt);
	if (!augment_basepos) {
		warning("augment_parse_nodes(): Said tree is corrupt");
		return 0;
	}

	while ((augment_basepos = aug_get_next_sibling(saidt, augment_basepos, &major, &minor))) {
		if ((major == 0x14b) && (minor == SAID_LONG(SAID_GT)))
			dontclaim = 1; // special case
		else // normal sentence part
			if (!(augment_sentence_part(saidt, augment_basepos, parset, parse_basepos, major, minor))) {
				scidprintf("Returning failure\n");
				return 0; // fail
			}
	}

	scidprintf("Returning success with dontclaim=%d\n", dontclaim);

	if (dontclaim)
		return SAID_PARTIAL_MATCH;
	else
		return 1; // full match
}


/*******************/
/**** Main code ****/
/*******************/

int said(EngineState *s, byte *spec, bool verbose) {
	int retval;
	Vocabulary *voc = g_sci->getVocabulary();

	parse_tree_node_t *parse_tree_ptr = voc->_parserNodes;

	if (voc->parserIsValid) {
		if (said_parse_spec(spec)) {
			printf("Offending spec was: ");
			voc->decipherSaidBlock(spec);
			return SAID_NO_MATCH;
		}

		if (verbose)
			vocab_dump_parse_tree("Said-tree", said_tree); // Nothing better to do yet
		retval = augment_parse_nodes(parse_tree_ptr, &(said_tree[0]));

		if (!retval)
			return SAID_NO_MATCH;
		else if (retval != SAID_PARTIAL_MATCH)
			return SAID_FULL_MATCH;
		else
			return SAID_PARTIAL_MATCH;
	}

	return SAID_NO_MATCH;
}


#ifdef SAID_DEBUG_PROGRAM
int main (int argc, char *argv) {
	byte block[] = {0x01, 0x00, 0xf8, 0xf5, 0x02, 0x01, 0xf6, 0xf2, 0x02, 0x01, 0xf2, 0x01, 0x03, 0xff};
	EngineState s;

	s.parser_valid = 1;
	said(&s, block);
}
#endif

} // End of namespace Sci