File: antlr3string.c

package info (click to toggle)
libantlr3c 3.4+dfsg-3
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 2,604 kB
  • sloc: ansic: 11,828; sh: 10,382; makefile: 99; cpp: 17
file content (1406 lines) | stat: -rw-r--r-- 39,742 bytes parent folder | download
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
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
/** \file
 * Implementation of the ANTLR3 string and string factory classes
 */

// [The "BSD licence"]
// Copyright (c) 2005-2009 Jim Idle, Temporal Wave LLC
// http://www.temporal-wave.com
// http://www.linkedin.com/in/jimidle
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
//    derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include    <antlr3string.h>

/* Factory API
 */
static    pANTLR3_STRING    newRaw8	(pANTLR3_STRING_FACTORY factory);
static    pANTLR3_STRING    newRawUTF16	(pANTLR3_STRING_FACTORY factory);
static    pANTLR3_STRING    newSize8	(pANTLR3_STRING_FACTORY factory, ANTLR3_UINT32 size);
static    pANTLR3_STRING    newSizeUTF16	(pANTLR3_STRING_FACTORY factory, ANTLR3_UINT32 size);
static    pANTLR3_STRING    newPtr8	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 string, ANTLR3_UINT32 size);
static    pANTLR3_STRING    newPtrUTF16_8	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 string, ANTLR3_UINT32 size);
static    pANTLR3_STRING    newPtrUTF16_UTF16	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 string, ANTLR3_UINT32 size);
static    pANTLR3_STRING    newStr8	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 string);
static    pANTLR3_STRING    newStrUTF16_8	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 string);
static    pANTLR3_STRING    newStrUTF16_UTF16	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 string);
static    void		    destroy	(pANTLR3_STRING_FACTORY factory, pANTLR3_STRING string);
static    pANTLR3_STRING    printable8	(pANTLR3_STRING_FACTORY factory, pANTLR3_STRING string);
static    pANTLR3_STRING    printableUTF16	(pANTLR3_STRING_FACTORY factory, pANTLR3_STRING string);
static    void		    closeFactory(pANTLR3_STRING_FACTORY factory);

/* String API
 */
static    pANTLR3_UINT8	    set8	(pANTLR3_STRING string, const char * chars);
static    pANTLR3_UINT8	    setUTF16_8	(pANTLR3_STRING string, const char * chars);
static    pANTLR3_UINT8	    setUTF16_UTF16	(pANTLR3_STRING string, const char * chars);
static    pANTLR3_UINT8	    append8	(pANTLR3_STRING string, const char * newbit);
static    pANTLR3_UINT8	    appendUTF16_8	(pANTLR3_STRING string, const char * newbit);
static    pANTLR3_UINT8	    appendUTF16_UTF16	(pANTLR3_STRING string, const char * newbit);
static	  pANTLR3_UINT8	    insert8	(pANTLR3_STRING string, ANTLR3_UINT32 point, const char * newbit);
static	  pANTLR3_UINT8	    insertUTF16_8	(pANTLR3_STRING string, ANTLR3_UINT32 point, const char * newbit);
static	  pANTLR3_UINT8	    insertUTF16_UTF16	(pANTLR3_STRING string, ANTLR3_UINT32 point, const char * newbit);

static    pANTLR3_UINT8	    setS	(pANTLR3_STRING string, pANTLR3_STRING chars);
static    pANTLR3_UINT8	    appendS	(pANTLR3_STRING string, pANTLR3_STRING newbit);
static	  pANTLR3_UINT8	    insertS	(pANTLR3_STRING string, ANTLR3_UINT32 point, pANTLR3_STRING newbit);

static    pANTLR3_UINT8	    addc8	(pANTLR3_STRING string, ANTLR3_UINT32 c);
static    pANTLR3_UINT8	    addcUTF16	(pANTLR3_STRING string, ANTLR3_UINT32 c);
static    pANTLR3_UINT8	    addi8	(pANTLR3_STRING string, ANTLR3_INT32 i);
static    pANTLR3_UINT8	    addiUTF16	(pANTLR3_STRING string, ANTLR3_INT32 i);
static	  pANTLR3_UINT8	    inserti8	(pANTLR3_STRING string, ANTLR3_UINT32 point, ANTLR3_INT32 i);
static	  pANTLR3_UINT8	    insertiUTF16	(pANTLR3_STRING string, ANTLR3_UINT32 point, ANTLR3_INT32 i);

static    ANTLR3_UINT32     compare8	(pANTLR3_STRING string, const char * compStr);
static    ANTLR3_UINT32     compareUTF16_8	(pANTLR3_STRING string, const char * compStr);
static    ANTLR3_UINT32     compareUTF16_UTF16(pANTLR3_STRING string, const char * compStr);
static    ANTLR3_UINT32     compareS	(pANTLR3_STRING string, pANTLR3_STRING compStr);
static    ANTLR3_UCHAR      charAt8	(pANTLR3_STRING string, ANTLR3_UINT32 offset);
static    ANTLR3_UCHAR      charAtUTF16	(pANTLR3_STRING string, ANTLR3_UINT32 offset);
static    pANTLR3_STRING    subString8	(pANTLR3_STRING string, ANTLR3_UINT32 startIndex, ANTLR3_UINT32 endIndex);
static    pANTLR3_STRING    subStringUTF16	(pANTLR3_STRING string, ANTLR3_UINT32 startIndex, ANTLR3_UINT32 endIndex);
static	  ANTLR3_INT32	    toInt32_8	(pANTLR3_STRING string);
static	  ANTLR3_INT32	    toInt32_UTF16  (pANTLR3_STRING string);
static	  pANTLR3_STRING    to8_8		(pANTLR3_STRING string);
static	  pANTLR3_STRING    to8_UTF16		(pANTLR3_STRING string);
static	pANTLR3_STRING		toUTF8_8	(pANTLR3_STRING string);
static	pANTLR3_STRING		toUTF8_UTF16	(pANTLR3_STRING string);

/* Local helpers
 */
static	void			stringInit8	(pANTLR3_STRING string);
static	void			stringInitUTF16	(pANTLR3_STRING string);
static	void	ANTLR3_CDECL	stringFree	(pANTLR3_STRING string);

ANTLR3_API pANTLR3_STRING_FACTORY 
antlr3StringFactoryNew(ANTLR3_UINT32 encoding)
{
	pANTLR3_STRING_FACTORY  factory;

	/* Allocate memory
	*/
	factory	= (pANTLR3_STRING_FACTORY) ANTLR3_CALLOC(1, sizeof(ANTLR3_STRING_FACTORY));

	if	(factory == NULL)
	{
		return	NULL;
	}

	/* Now we make a new list to track the strings.
	*/
	factory->strings	= antlr3VectorNew(0);
	factory->index	= 0;

	if	(factory->strings == NULL)
	{
		ANTLR3_FREE(factory);
		return	NULL;
	}

    // Install the API
    //
    // TODO: These encodings need equivalent functions to
    // UTF16 and 8Bit if I am going to support those encodings in the STRING stuff.
	// The STRING stuff was intended as a quick and dirty hack for people that did not
	// want to worry about memory and performance very much, but nobody ever reads the 
	// notes or comments or uses the email list search. I want to discourage using these
	// interfaces as it is much more efficient to use the pointers within the tokens
	// directly, so I am not implementing the string stuff for the newer encodings.
    // We install the standard 8 and 16 bit functions for the UTF 8 and 16 but they
	// will not be useful beyond returning the text.
	// 
    switch(encoding)
    {
		case    ANTLR3_ENC_UTF32:
			break;

		case    ANTLR3_ENC_UTF32BE:
			break;

		case    ANTLR3_ENC_UTF32LE:
			break;

		case    ANTLR3_ENC_UTF16BE:
		case    ANTLR3_ENC_UTF16LE:
		case    ANTLR3_ENC_UTF16:

			factory->newRaw	    =  newRawUTF16;
			factory->newSize	=  newSizeUTF16;
			factory->newPtr	    =  newPtrUTF16_UTF16;
			factory->newPtr8	=  newPtrUTF16_8;
			factory->newStr	    =  newStrUTF16_UTF16;
			factory->newStr8	=  newStrUTF16_8;
			factory->printable	=  printableUTF16;
			factory->destroy	=  destroy;
			factory->close	    =  closeFactory;
			break;
	 
		case    ANTLR3_ENC_UTF8:
		case    ANTLR3_ENC_EBCDIC:
		case    ANTLR3_ENC_8BIT:
		default:

			factory->newRaw	    =  newRaw8;
			factory->newSize	=  newSize8;
			factory->newPtr	    =  newPtr8;
			factory->newPtr8	=  newPtr8;
			factory->newStr	    =  newStr8;
			factory->newStr8	=  newStr8;
			factory->printable	=  printable8;
			factory->destroy	=  destroy;
			factory->close	    =  closeFactory;
			break;
    }
	return  factory;
}


/**
 *
 * \param factory 
 * \return 
 */
static    pANTLR3_STRING    
newRaw8	(pANTLR3_STRING_FACTORY factory)
{
    pANTLR3_STRING  string;

    string  = (pANTLR3_STRING) ANTLR3_MALLOC(sizeof(ANTLR3_STRING));

    if	(string == NULL)
    {
		return	NULL;
    }

    /* Structure is allocated, now fill in the API etc.
     */
    stringInit8(string);
    string->factory = factory;

    /* Add the string into the allocated list
     */
    factory->strings->set(factory->strings, factory->index, (void *) string, (void (ANTLR3_CDECL *)(void *))(stringFree), ANTLR3_TRUE);
    string->index   = factory->index++;

    return string;
}
/**
 *
 * \param factory 
 * \return 
 */
static    pANTLR3_STRING    
newRawUTF16	(pANTLR3_STRING_FACTORY factory)
{
    pANTLR3_STRING  string;

    string  = (pANTLR3_STRING) ANTLR3_MALLOC(sizeof(ANTLR3_STRING));

    if	(string == NULL)
    {
		return	NULL;
    }

    /* Structure is allocated, now fill in the API etc.
     */
    stringInitUTF16(string);
    string->factory = factory;

    /* Add the string into the allocated list
     */
    factory->strings->set(factory->strings, factory->index, (void *) string, (void (ANTLR3_CDECL *)(void *))(stringFree), ANTLR3_TRUE);
    string->index   = factory->index++;

    return string;
}
static	 
void	ANTLR3_CDECL stringFree  (pANTLR3_STRING string)
{
    /* First free the string itself if there was anything in it
     */
    if	(string->chars)
    {
	ANTLR3_FREE(string->chars);
    }

    /* Now free the space for this string
     */
    ANTLR3_FREE(string);

    return;
}
/**
 *
 * \param string 
 * \return 
 */
static	void
stringInit8  (pANTLR3_STRING string)
{
    string->len			= 0;
    string->size		= 0;
    string->chars		= NULL;
    string->encoding	= ANTLR3_ENC_8BIT ;

    /* API for 8 bit strings*/

    string->set		= set8;
    string->set8	= set8;
    string->append	= append8;
    string->append8	= append8;
    string->insert	= insert8;
    string->insert8	= insert8;
    string->addi	= addi8;
    string->inserti	= inserti8;
    string->addc	= addc8;
    string->charAt	= charAt8;
    string->compare	= compare8;
    string->compare8	= compare8;
    string->subString	= subString8;
    string->toInt32	= toInt32_8;
    string->to8		= to8_8;
    string->toUTF8	= toUTF8_8;
    string->compareS	= compareS;
    string->setS	= setS;
    string->appendS	= appendS;
    string->insertS	= insertS;

}
/**
 *
 * \param string 
 * \return 
 */
static	void
stringInitUTF16  (pANTLR3_STRING string)
{
    string->len		= 0;
    string->size	= 0;
    string->chars	= NULL;
    string->encoding	= ANTLR3_ENC_8BIT;

    /* API for UTF16 strings */

    string->set		= setUTF16_UTF16;
    string->set8	= setUTF16_8;
    string->append	= appendUTF16_UTF16;
    string->append8	= appendUTF16_8;
    string->insert	= insertUTF16_UTF16;
    string->insert8	= insertUTF16_8;
    string->addi	= addiUTF16;
    string->inserti	= insertiUTF16;
    string->addc	= addcUTF16;
    string->charAt	= charAtUTF16;
    string->compare	= compareUTF16_UTF16;
    string->compare8	= compareUTF16_8;
    string->subString	= subStringUTF16;
    string->toInt32	= toInt32_UTF16;
    string->to8		= to8_UTF16;
    string->toUTF8	= toUTF8_UTF16;

    string->compareS	= compareS;
    string->setS	= setS;
    string->appendS	= appendS;
    string->insertS	= insertS;
}
/**
 *
 * \param string 
 * \return 
 * TODO: Implement UTF-8
 */
static	void
stringInitUTF8  (pANTLR3_STRING string)
{
    string->len	    = 0;
    string->size    = 0;
    string->chars   = NULL;

    /* API */

}

// Convert an 8 bit string into a UTF8 representation, which is in fact just the string itself
// a memcpy as we make no assumptions about the 8 bit encoding.
//
static	pANTLR3_STRING		
toUTF8_8	(pANTLR3_STRING string)
{
	return string->factory->newPtr(string->factory, (pANTLR3_UINT8)(string->chars), string->len);
}

extern void ConvertUTF16toUTF8 (
    const UTF16 **sourceStart,
    const UTF16 *sourceEnd,
    UTF8 **targetStart,
    UTF8 *targetEnd
    );

// Convert a UTF16 string into a UTF8 representation using the Unicode.org
// supplied C algorithms, which are now contained within the ANTLR3 C runtime
// as permitted by the Unicode license (within the source code antlr3convertutf.c/.h
// UCS2 has the same encoding as UTF16 so we can use UTF16 converter.
//
static	pANTLR3_STRING	
toUTF8_UTF16	(pANTLR3_STRING string)
{

    UTF8	      * outputEnd;	
    UTF16	      * inputEnd;
    pANTLR3_STRING	utf8String;

    // Allocate the output buffer, which needs to accommodate potentially
    // 3X (in bytes) the input size (in chars).
    //
    utf8String	= string->factory->newStr8(string->factory, (pANTLR3_UINT8)"");

    if	(utf8String != NULL)
    {
        // Free existing allocation
        //
        ANTLR3_FREE(utf8String->chars);

        // Reallocate according to maximum expected size
        //
        utf8String->size	= string->len *3;
        utf8String->chars	= (pANTLR3_UINT8)ANTLR3_MALLOC(utf8String->size +1);

        if	(utf8String->chars != NULL)
        {
            inputEnd  = (UTF16 *)	(string->chars);
            outputEnd = (UTF8 *)	(utf8String->chars);

            // Call the Unicode converter
            //
            ConvertUTF16toUTF8
                (
                (const UTF16**)&inputEnd, 
                ((const UTF16 *)(string->chars)) + string->len, 
                &outputEnd, 
                outputEnd + utf8String->size - 1
                );

            // We don't really care if things failed or not here, we just converted
            // everything that was vaguely possible and stopped when it wasn't. It is
            // up to the grammar programmer to verify that the input is sensible.
            //
            utf8String->len = ANTLR3_UINT32_CAST(((pANTLR3_UINT8)outputEnd) - utf8String->chars);

            *(outputEnd+1) = '\0';		// Always null terminate
        }
    }
    return utf8String;
}

/**
 * Creates a new string with enough capacity for size 8 bit characters plus a terminator.
 *
 * \param[in] factory - Pointer to the string factory that owns strings
 * \param[in] size - In characters
 * \return pointer to the new string.
 */
static    pANTLR3_STRING    
newSize8	(pANTLR3_STRING_FACTORY factory, ANTLR3_UINT32 size)
{
    pANTLR3_STRING  string;

    string  = factory->newRaw(factory);

    if	(string == NULL)
    {
        return	string;
    }

    /* Always add one more byte for a terminator ;-)
    */
    string->chars	= (pANTLR3_UINT8) ANTLR3_MALLOC((size_t)(sizeof(ANTLR3_UINT8) * (size+1)));
    *(string->chars)	= '\0';
    string->size	= size + 1;


    return string;
}
/**
 * Creates a new string with enough capacity for size UTF16 characters plus a terminator.
 *
 * \param[in] factory - Pointer to the string factory that owns strings
 * \param[in] size - In characters (count double for surrogate pairs!!!)
 * \return pointer to the new string.
 */
static    pANTLR3_STRING    
newSizeUTF16	(pANTLR3_STRING_FACTORY factory, ANTLR3_UINT32 size)
{
    pANTLR3_STRING  string;

    string  = factory->newRaw(factory);

    if	(string == NULL)
    {
        return	string;
    }

    /* Always add one more byte for a terminator ;-)
    */	
    string->chars	= (pANTLR3_UINT8) ANTLR3_MALLOC((size_t)(sizeof(ANTLR3_UINT16) * (size+1)));
    *(string->chars)	= '\0';
    string->size	= size+1;	/* Size is always in characters, as is len */

    return string;
}

/** Creates a new 8 bit string initialized with the 8 bit characters at the 
 *  supplied ptr, of pre-determined size.
 * \param[in] factory - Pointer to the string factory that owns the strings
 * \param[in] ptr - Pointer to 8 bit encoded characters
 * \return pointer to the new string
 */
static    pANTLR3_STRING    
newPtr8	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 ptr, ANTLR3_UINT32 size)
{
	pANTLR3_STRING  string;

	string  = factory->newSize(factory, size);

	if	(string == NULL)
	{
		return	NULL;
	}

	if	(size <= 0)
	{
		return	string;
	}

	if	(ptr != NULL)
	{
		ANTLR3_MEMMOVE(string->chars, (const void *)ptr, size);
		*(string->chars + size) = '\0';	    /* Terminate, these strings are usually used for Token streams and printing etc.	*/
		string->len = size;
	}

	return  string;
}

/** Creates a new UTF16 string initialized with the 8 bit characters at the 
 *  supplied 8 bit character ptr, of pre-determined size.
 * \param[in] factory - Pointer to the string factory that owns the strings
 * \param[in] ptr - Pointer to 8 bit encoded characters
 * \return pointer to the new string
 */
static    pANTLR3_STRING    
newPtrUTF16_8	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 ptr, ANTLR3_UINT32 size)
{
	pANTLR3_STRING  string;

	/* newSize accepts size in characters, not bytes
	*/
	string  = factory->newSize(factory, size);

	if	(string == NULL)
	{
		return	NULL;
	}

	if	(size <= 0)
	{
		return	string;
	}

	if	(ptr != NULL)
	{
		pANTLR3_UINT16	out;
		ANTLR3_INT32    inSize;

		out = (pANTLR3_UINT16)(string->chars);
		inSize	= size;

		while	(inSize-- > 0)
		{
			*out++ = (ANTLR3_UINT16)(*ptr++);
		}

		/* Terminate, these strings are usually used for Token streams and printing etc.	
		*/
		*(((pANTLR3_UINT16)(string->chars)) + size) = '\0';

		string->len = size;
	}

	return  string;
}

/** Creates a new UTF16 string initialized with the UTF16 characters at the 
 *  supplied ptr, of pre-determined size.
 * \param[in] factory - Pointer to the string factory that owns the strings
 * \param[in] ptr - Pointer to UTF16 encoded characters
 * \return pointer to the new string
 */
static    pANTLR3_STRING    
newPtrUTF16_UTF16	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 ptr, ANTLR3_UINT32 size)
{
	pANTLR3_STRING  string;

	string  = factory->newSize(factory, size);

	if	(string == NULL)
	{
		return	NULL;
	}

	if	(size <= 0)
	{
		return	string;
	}

	if	(ptr != NULL)
	{
		ANTLR3_MEMMOVE(string->chars, (const void *)ptr, (size * sizeof(ANTLR3_UINT16)));

		/* Terminate, these strings are usually used for Token streams and printing etc.	
		*/
		*(((pANTLR3_UINT16)(string->chars)) + size) = '\0';	    
		string->len = size;
	}

	return  string;
}

/** Create a new 8 bit string from the supplied, null terminated, 8 bit string pointer.
 * \param[in] factory - Pointer to the string factory that owns strings.
 * \param[in] ptr - Pointer to the 8 bit encoded string
 * \return Pointer to the newly initialized string
 */
static    pANTLR3_STRING    
newStr8	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 ptr)
{
    return factory->newPtr8(factory, ptr, (ANTLR3_UINT32)strlen((const char *)ptr));
}

/** Create a new UTF16 string from the supplied, null terminated, 8 bit string pointer.
 * \param[in] factory - Pointer to the string factory that owns strings.
 * \param[in] ptr - Pointer to the 8 bit encoded string
 * \return POinter to the newly initialized string
 */
static    pANTLR3_STRING    
newStrUTF16_8	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 ptr)
{
    return factory->newPtr8(factory, ptr, (ANTLR3_UINT32)strlen((const char *)ptr));
}

/** Create a new UTF16 string from the supplied, null terminated, UTF16 string pointer.
 * \param[in] factory - Pointer to the string factory that owns strings.
 * \param[in] ptr - Pointer to the UTF16 encoded string
 * \return Pointer to the newly initialized string
 */
static    pANTLR3_STRING    
newStrUTF16_UTF16	(pANTLR3_STRING_FACTORY factory, pANTLR3_UINT8 ptr)
{
    pANTLR3_UINT16  in;
    ANTLR3_UINT32   count;

    /** First, determine the length of the input string
     */
    in	    = (pANTLR3_UINT16)ptr;
    count   = 0;

    while   (*in++ != '\0')
    {
		count++;
    }
    return factory->newPtr(factory, ptr, count);
}

static    void		    
destroy	(pANTLR3_STRING_FACTORY factory, pANTLR3_STRING string)
{
    // Record which string we are deleting
    //
    ANTLR3_UINT32 strIndex = string->index;
    
    // Ensure that the string was not factory made, or we would try
    // to delete memory that wasn't allocated outside the factory
    // block.
    // Remove the specific indexed string from the vector
    //
    factory->strings->del(factory->strings, strIndex);

    // One less string in the vector, so decrement the factory index
    // so that the next string allocated is indexed correctly with
    // respect to the vector.
    //
    factory->index--;

    // Now we have to reindex the strings in the vector that followed
    // the one we just deleted. We only do this if the one we just deleted
    // was not the last one.
    //
    if  (strIndex< factory->index)
    {
        // We must reindex the strings after the one we just deleted.
        // The one that follows the one we just deleted is also out
        // of whack, so we start there.
        //
        ANTLR3_UINT32 i;

        for (i = strIndex; i < factory->index; i++)
        {
            // Renumber the entry
            //
            ((pANTLR3_STRING)(factory->strings->elements[i].element))->index = i;
        }
    }

    // The string has been destroyed and the elements of the factory are reindexed.
    //

}

static    pANTLR3_STRING    
printable8(pANTLR3_STRING_FACTORY factory, pANTLR3_STRING instr)
{
    pANTLR3_STRING  string;
    
    /* We don't need to be too efficient here, this is mostly for error messages and so on.
     */
    pANTLR3_UINT8   scannedText;
    ANTLR3_UINT32   i;

    /* Assume we need as much as twice as much space to parse out the control characters
     */
    string  = factory->newSize(factory, instr->len *2 + 1);

    /* Scan through and replace unprintable (in terms of this routine)
     * characters
     */
    scannedText = string->chars;

    for	(i = 0; i < instr->len; i++)
    {
		if (*(instr->chars + i) == '\n')
		{
			*scannedText++ = '\\';
			*scannedText++ = 'n';
		}
		else if (*(instr->chars + i) == '\r')
		{
			*scannedText++ = '\\';
			*scannedText++ = 'r';
		}
		else if	(!isprint(*(instr->chars +i)))
		{
			*scannedText++ = '?';
		}
		else
		{
			*scannedText++ = *(instr->chars + i);
		}
    }
    *scannedText  = '\0';

    string->len	= (ANTLR3_UINT32)(scannedText - string->chars);
    
    return  string;
}

static    pANTLR3_STRING    
printableUTF16(pANTLR3_STRING_FACTORY factory, pANTLR3_STRING instr)
{
    pANTLR3_STRING  string;
    
    /* We don't need to be too efficient here, this is mostly for error messages and so on.
     */
    pANTLR3_UINT16  scannedText;
    pANTLR3_UINT16  inText;
    ANTLR3_UINT32   i;
    ANTLR3_UINT32   outLen;

    /* Assume we need as much as twice as much space to parse out the control characters
     */
    string  = factory->newSize(factory, instr->len *2 + 1);

    /* Scan through and replace unprintable (in terms of this routine)
     * characters
     */
    scannedText = (pANTLR3_UINT16)(string->chars);
    inText	= (pANTLR3_UINT16)(instr->chars);
    outLen	= 0;

    for	(i = 0; i < instr->len; i++)
    {
		if (*(inText + i) == '\n')
		{
			*scannedText++   = '\\';
			*scannedText++   = 'n';
			outLen	    += 2;
		}
		else if (*(inText + i) == '\r')
		{
			*scannedText++   = '\\';
			*scannedText++   = 'r';
			outLen	    += 2;
		}
		else if	(!isprint(*(inText +i)))
		{
			*scannedText++ = '?';
			outLen++;
		}
		else
		{
			*scannedText++ = *(inText + i);
			outLen++;
		}
    }
    *scannedText  = '\0';

    string->len	= outLen;
    
    return  string;
}

/** Fascist Capitalist Pig function created
 *  to oppress the workers comrade.
 */
static    void		    
closeFactory	(pANTLR3_STRING_FACTORY factory)
{
    /* Delete the vector we were tracking the strings with, this will
     * causes all the allocated strings to be deallocated too
     */
    factory->strings->free(factory->strings);

    /* Delete the space for the factory itself
     */
    ANTLR3_FREE((void *)factory);
}

static    pANTLR3_UINT8   
append8	(pANTLR3_STRING string, const char * newbit)
{
    ANTLR3_UINT32 len;

    len	= (ANTLR3_UINT32)strlen(newbit);

    if	(string->size < (string->len + len + 1))
    {
		string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)(string->len + len + 1));
		string->size	= string->len + len + 1;
    }

    /* Note we copy one more byte than the strlen in order to get the trailing
     */
    ANTLR3_MEMMOVE((void *)(string->chars + string->len), newbit, (ANTLR3_UINT32)(len+1));
    string->len	+= len;

    return string->chars;
}

static    pANTLR3_UINT8   
appendUTF16_8	(pANTLR3_STRING string, const char * newbit)
{
    ANTLR3_UINT32   len;
    pANTLR3_UINT16  apPoint;
    ANTLR3_UINT32   count;

    len	= (ANTLR3_UINT32)strlen(newbit);

    if	(string->size < (string->len + len + 1))
    {
		string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)((sizeof(ANTLR3_UINT16)*(string->len + len + 1))));
		string->size	= string->len + len + 1;
    }

    apPoint = ((pANTLR3_UINT16)string->chars) + string->len;
    string->len	+= len;

    for	(count = 0; count < len; count++)
    {
		*apPoint++   = *(newbit + count);
    }
    *apPoint = '\0';

    return string->chars;
}

static    pANTLR3_UINT8   
appendUTF16_UTF16	(pANTLR3_STRING string, const char * newbit)
{
    ANTLR3_UINT32 len;
    pANTLR3_UINT16  in;

    /** First, determine the length of the input string
     */
    in	    = (pANTLR3_UINT16)newbit;
    len   = 0;

    while   (*in++ != '\0')
    {
		len++;
    }

    if	(string->size < (string->len + len + 1))
    {
		string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)( sizeof(ANTLR3_UINT16) *(string->len + len + 1) ));
		string->size	= string->len + len + 1;
    }

    /* Note we copy one more byte than the strlen in order to get the trailing delimiter
     */
    ANTLR3_MEMMOVE((void *)(((pANTLR3_UINT16)string->chars) + string->len), newbit, (ANTLR3_UINT32)(sizeof(ANTLR3_UINT16)*(len+1)));
    string->len	+= len;

    return string->chars;
}

static    pANTLR3_UINT8   
set8	(pANTLR3_STRING string, const char * chars)
{
    ANTLR3_UINT32	len;

    len = (ANTLR3_UINT32)strlen(chars);
    if	(string->size < len + 1)
    {
		string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)(len + 1));
		string->size	= len + 1;
    }

    /* Note we copy one more byte than the strlen in order to get the trailing '\0'
     */
    ANTLR3_MEMMOVE((void *)(string->chars), chars, (ANTLR3_UINT32)(len+1));
    string->len	    = len;

    return  string->chars;

}

static    pANTLR3_UINT8   
setUTF16_8	(pANTLR3_STRING string, const char * chars)
{
    ANTLR3_UINT32	len;
    ANTLR3_UINT32	count;
    pANTLR3_UINT16	apPoint;

    len = (ANTLR3_UINT32)strlen(chars);
    if	(string->size < len + 1)
	{
		string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)(sizeof(ANTLR3_UINT16)*(len + 1)));
		string->size	= len + 1;
    }
    apPoint = ((pANTLR3_UINT16)string->chars);
    string->len	= len;

    for	(count = 0; count < string->len; count++)
    {
		*apPoint++   = *(chars + count);
    }
    *apPoint = '\0';

    return  string->chars;
}

static    pANTLR3_UINT8   
setUTF16_UTF16    (pANTLR3_STRING string, const char * chars)
{
    ANTLR3_UINT32   len;
    pANTLR3_UINT16  in;

    /** First, determine the length of the input string
     */
    in	    = (pANTLR3_UINT16)chars;
    len   = 0;

    while   (*in++ != '\0')
    {
		len++;
    }

    if	(string->size < len + 1)
    {
		string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)(sizeof(ANTLR3_UINT16)*(len + 1)));
		string->size	= len + 1;
    }

    /* Note we copy one more byte than the strlen in order to get the trailing '\0'
     */
    ANTLR3_MEMMOVE((void *)(string->chars), chars, (ANTLR3_UINT32)((len+1) * sizeof(ANTLR3_UINT16)));
    string->len	    = len;

    return  string->chars;

}

static    pANTLR3_UINT8   
addc8	(pANTLR3_STRING string, ANTLR3_UINT32 c)
{
    if	(string->size < string->len + 2)
    {
		string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)(string->len + 2));
		string->size	= string->len + 2;
    }
    *(string->chars + string->len)	= (ANTLR3_UINT8)c;
    *(string->chars + string->len + 1)	= '\0';
    string->len++;

    return  string->chars;
}

static    pANTLR3_UINT8   
addcUTF16	(pANTLR3_STRING string, ANTLR3_UINT32 c)
{
    pANTLR3_UINT16  ptr;

    if	(string->size < string->len + 2)
    {
		string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)(sizeof(ANTLR3_UINT16) * (string->len + 2)));
		string->size	= string->len + 2;
    }
    ptr	= (pANTLR3_UINT16)(string->chars);

    *(ptr + string->len)	= (ANTLR3_UINT16)c;
    *(ptr + string->len + 1)	= '\0';
    string->len++;

    return  string->chars;
}

static    pANTLR3_UINT8   
addi8	(pANTLR3_STRING string, ANTLR3_INT32 i)
{
    ANTLR3_UINT8	    newbit[32];

    sprintf((char *)newbit, "%d", i);

    return  string->append8(string, (const char *)newbit);
}
static    pANTLR3_UINT8   
addiUTF16	(pANTLR3_STRING string, ANTLR3_INT32 i)
{
    ANTLR3_UINT8	    newbit[32];

    sprintf((char *)newbit, "%d", i);

    return  string->append8(string, (const char *)newbit);
}

static	  pANTLR3_UINT8
inserti8    (pANTLR3_STRING string, ANTLR3_UINT32 point, ANTLR3_INT32 i)
{
    ANTLR3_UINT8	    newbit[32];

    sprintf((char *)newbit, "%d", i);
    return  string->insert8(string, point, (const char *)newbit);
}
static	  pANTLR3_UINT8
insertiUTF16    (pANTLR3_STRING string, ANTLR3_UINT32 point, ANTLR3_INT32 i)
{
    ANTLR3_UINT8	    newbit[32];

    sprintf((char *)newbit, "%d", i);
    return  string->insert8(string, point, (const char *)newbit);
}

static	pANTLR3_UINT8
insert8	(pANTLR3_STRING string, ANTLR3_UINT32 point, const char * newbit)
{
    ANTLR3_UINT32	len;

    if	(point >= string->len)
    {
		return	string->append(string, newbit);
    }
 
    len	= (ANTLR3_UINT32)strlen(newbit);

    if	(len == 0)
    {
		return	string->chars;
    }

    if	(string->size < (string->len + len + 1))
    {
		string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)(string->len + len + 1));
		string->size	= string->len + len + 1;
    }

    /* Move the characters we are inserting before, including the delimiter
     */
    ANTLR3_MEMMOVE((void *)(string->chars + point + len), (void *)(string->chars + point), (ANTLR3_UINT32)(string->len - point + 1));

    /* Note we copy the exact number of bytes
     */
    ANTLR3_MEMMOVE((void *)(string->chars + point), newbit, (ANTLR3_UINT32)(len));
    
    string->len += len;

    return  string->chars;
}

static	pANTLR3_UINT8
insertUTF16_8	(pANTLR3_STRING string, ANTLR3_UINT32 point, const char * newbit)
{
    ANTLR3_UINT32	len;
    ANTLR3_UINT32	count;
    pANTLR3_UINT16	inPoint;

    if	(point >= string->len)
    {
		return	string->append8(string, newbit);
    }
 
    len	= (ANTLR3_UINT32)strlen(newbit);

    if	(len == 0)
    {
		return	string->chars;
    }

    if	(string->size < (string->len + len + 1))
    {
	string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)(sizeof(ANTLR3_UINT16)*(string->len + len + 1)));
	string->size	= string->len + len + 1;
    }

    /* Move the characters we are inserting before, including the delimiter
     */
    ANTLR3_MEMMOVE((void *)(((pANTLR3_UINT16)string->chars) + point + len), (void *)(((pANTLR3_UINT16)string->chars) + point), (ANTLR3_UINT32)(sizeof(ANTLR3_UINT16)*(string->len - point + 1)));

    string->len += len;
    
    inPoint = ((pANTLR3_UINT16)(string->chars))+point;
    for	(count = 0; count<len; count++)
    {
		*(inPoint + count) = (ANTLR3_UINT16)(*(newbit+count));
    }

    return  string->chars;
}

static	pANTLR3_UINT8
insertUTF16_UTF16	(pANTLR3_STRING string, ANTLR3_UINT32 point, const char * newbit)
{
    ANTLR3_UINT32	len;
    pANTLR3_UINT16	in;

    if	(point >= string->len)
    {
		return	string->append(string, newbit);
    }
 
    /** First, determine the length of the input string
     */
    in	    = (pANTLR3_UINT16)newbit;
    len	    = 0;

    while   (*in++ != '\0')
    {
		len++;
    }

    if	(len == 0)
    {
		return	string->chars;
    }

    if	(string->size < (string->len + len + 1))
    {
		string->chars	= (pANTLR3_UINT8) ANTLR3_REALLOC((void *)string->chars, (ANTLR3_UINT32)(sizeof(ANTLR3_UINT16)*(string->len + len + 1)));
		string->size	= string->len + len + 1;
    }

    /* Move the characters we are inserting before, including the delimiter
     */
    ANTLR3_MEMMOVE((void *)(((pANTLR3_UINT16)string->chars) + point + len), (void *)(((pANTLR3_UINT16)string->chars) + point), (ANTLR3_UINT32)(sizeof(ANTLR3_UINT16)*(string->len - point + 1)));


    /* Note we copy the exact number of characters
     */
    ANTLR3_MEMMOVE((void *)(((pANTLR3_UINT16)string->chars) + point), newbit, (ANTLR3_UINT32)(sizeof(ANTLR3_UINT16)*(len)));
    
    string->len += len;

    return  string->chars;
}

static    pANTLR3_UINT8	    setS	(pANTLR3_STRING string, pANTLR3_STRING chars)
{
    return  string->set(string, (const char *)(chars->chars));
}

static    pANTLR3_UINT8	    appendS	(pANTLR3_STRING string, pANTLR3_STRING newbit)
{
    /* We may be passed an empty string, in which case we just return the current pointer
     */
    if	(newbit == NULL || newbit->len == 0 || newbit->size == 0 || newbit->chars == NULL)
    {
		return	string->chars;
    }
    else
    {
		return  string->append(string, (const char *)(newbit->chars));
    }
}

static	  pANTLR3_UINT8	    insertS	(pANTLR3_STRING string, ANTLR3_UINT32 point, pANTLR3_STRING newbit)
{
    return  string->insert(string, point, (const char *)(newbit->chars));
}

/* Function that compares the text of a string to the supplied
 * 8 bit character string and returns a result a la strcmp()
 */
static ANTLR3_UINT32   
compare8	(pANTLR3_STRING string, const char * compStr)
{
    return  strcmp((const char *)(string->chars), compStr);
}

/* Function that compares the text of a string with the supplied character string
 * (which is assumed to be in the same encoding as the string itself) and returns a result
 * a la strcmp()
 */
static ANTLR3_UINT32   
compareUTF16_8	(pANTLR3_STRING string, const char * compStr)
{
    pANTLR3_UINT16  ourString;
    ANTLR3_UINT32   charDiff;

    ourString	= (pANTLR3_UINT16)(string->chars);

    while   (((ANTLR3_UCHAR)(*ourString) != '\0') && ((ANTLR3_UCHAR)(*compStr) != '\0'))
    {
		charDiff = *ourString - *compStr;
		if  (charDiff != 0)
		{
			return charDiff;
		}
		ourString++;
		compStr++;
    }

    /* At this point, one of the strings was terminated
     */
    return (ANTLR3_UINT32)((ANTLR3_UCHAR)(*ourString) - (ANTLR3_UCHAR)(*compStr));

}

/* Function that compares the text of a string with the supplied character string
 * (which is assumed to be in the same encoding as the string itself) and returns a result
 * a la strcmp()
 */
static ANTLR3_UINT32   
compareUTF16_UTF16	(pANTLR3_STRING string, const char * compStr8)
{
    pANTLR3_UINT16  ourString;
    pANTLR3_UINT16  compStr;
    ANTLR3_UINT32   charDiff;

    ourString	= (pANTLR3_UINT16)(string->chars);
    compStr	= (pANTLR3_UINT16)(compStr8);

    while   (((ANTLR3_UCHAR)(*ourString) != '\0') && ((ANTLR3_UCHAR)(*((pANTLR3_UINT16)compStr)) != '\0'))
    {
		charDiff = *ourString - *compStr;
		if  (charDiff != 0)
		{
			return charDiff;
		}
		ourString++;
		compStr++;
    }

    /* At this point, one of the strings was terminated
     */
    return (ANTLR3_UINT32)((ANTLR3_UCHAR)(*ourString) - (ANTLR3_UCHAR)(*compStr));
}

/* Function that compares the text of a string with the supplied string
 * (which is assumed to be in the same encoding as the string itself) and returns a result
 * a la strcmp()
 */
static ANTLR3_UINT32   
compareS    (pANTLR3_STRING string, pANTLR3_STRING compStr)
{
    return  string->compare(string, (const char *)compStr->chars);
}


/* Function that returns the character indexed at the supplied
 * offset as a 32 bit character.
 */
static ANTLR3_UCHAR    
charAt8	    (pANTLR3_STRING string, ANTLR3_UINT32 offset)
{
    if	(offset > string->len)
    {
		return (ANTLR3_UCHAR)'\0';
    }
    else
    {
		return  (ANTLR3_UCHAR)(*(string->chars + offset));
    }
}

/* Function that returns the character indexed at the supplied
 * offset as a 32 bit character.
 */
static ANTLR3_UCHAR    
charAtUTF16    (pANTLR3_STRING string, ANTLR3_UINT32 offset)
{
    if	(offset > string->len)
    {
		return (ANTLR3_UCHAR)'\0';
    }
    else
    {
		return  (ANTLR3_UCHAR)(*((pANTLR3_UINT16)(string->chars) + offset));
    }
}

/* Function that returns a substring of the supplied string a la .subString(s,e)
 * in java runtimes.
 */
static pANTLR3_STRING
subString8   (pANTLR3_STRING string, ANTLR3_UINT32 startIndex, ANTLR3_UINT32 endIndex)
{
    pANTLR3_STRING newStr;

    if	(endIndex > string->len)
    {
		endIndex = string->len + 1;
    }
    newStr  = string->factory->newPtr(string->factory, string->chars + startIndex, endIndex - startIndex);

    return newStr;
}

/* Returns a substring of the supplied string a la .subString(s,e)
 * in java runtimes.
 */
static pANTLR3_STRING
subStringUTF16  (pANTLR3_STRING string, ANTLR3_UINT32 startIndex, ANTLR3_UINT32 endIndex)
{
    pANTLR3_STRING newStr;

    if	(endIndex > string->len)
    {
		endIndex = string->len + 1;
    }
    newStr  = string->factory->newPtr(string->factory, (pANTLR3_UINT8)((pANTLR3_UINT16)(string->chars) + startIndex), endIndex - startIndex);

    return newStr;
}

/* Function that can convert the characters in the string to an integer
 */
static ANTLR3_INT32
toInt32_8	    (struct ANTLR3_STRING_struct * string)
{
    return  atoi((const char *)(string->chars));
}

/* Function that can convert the characters in the string to an integer
 */
static ANTLR3_INT32
toInt32_UTF16       (struct ANTLR3_STRING_struct * string)
{
    pANTLR3_UINT16  input;
    ANTLR3_INT32   value;
    ANTLR3_BOOLEAN  negate;

    value   = 0;
    input   = (pANTLR3_UINT16)(string->chars);
    negate  = ANTLR3_FALSE;

    if	(*input == (ANTLR3_UCHAR)'-')
    {
		negate = ANTLR3_TRUE;
		input++;
    }
    else if (*input == (ANTLR3_UCHAR)'+')
    {
		input++;
    }

    while   (*input != '\0' && isdigit(*input))
    {
		value	 = value * 10;
		value	+= ((ANTLR3_UINT32)(*input) - (ANTLR3_UINT32)'0');
		input++;
    }

    return negate ? -value : value;
}

/* Function that returns a pointer to an 8 bit version of the string,
 * which in this case is just the string as this is 
 * 8 bit encodiing anyway.
 */
static	  pANTLR3_STRING	    to8_8	(pANTLR3_STRING string)
{
    return  string;
}

/* Function that returns an 8 bit version of the string,
 * which in this case is returning all the UTF16 characters
 * narrowed back into 8 bits, with characters that are too large
 * replaced with '_'
 */
static	  pANTLR3_STRING    to8_UTF16	(pANTLR3_STRING string)
{
	pANTLR3_STRING  newStr;
	ANTLR3_UINT32   i;

	/* Create a new 8 bit string
	*/
	newStr  = newRaw8(string->factory);

	if	(newStr == NULL)
	{
		return	NULL;
	}

	/* Always add one more byte for a terminator
	*/
	newStr->chars   = (pANTLR3_UINT8) ANTLR3_MALLOC((size_t)(string->len + 1));
	newStr->size    = string->len + 1;
	newStr->len	    = string->len;

	/* Now copy each UTF16 charActer , making it an 8 bit character of 
	* some sort.
	*/
	for	(i=0; i<string->len; i++)
	{
		ANTLR3_UCHAR	c;

		c = *(((pANTLR3_UINT16)(string->chars)) + i);

		*(newStr->chars + i) = (ANTLR3_UINT8)(c > 255 ? '_' : c);
	}

	/* Terminate
	*/
	*(newStr->chars + newStr->len) = '\0';

	return newStr;
}