summaryrefslogtreecommitdiff
path: root/Build/source/texk/bibtexu/bibtex.h
blob: 58245149241f6beb071a4ea5c58434724cb95354 (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
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
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
/*-
******************************************************************************
******************************************************************************
**
**  MODULE
**
**      $RCSfile: bibtex.h,v $
**      $Revision: 3.71 $
**      $Date: 1996/08/18 20:47:30 $
**
**  DESCRIPTION
**
**      A 32-bit implementation of BibTeX v0.99c for MS-DOS, OS/2 2.x, 
**      Unix and VMS.  This C language implementation is based on the 
**      original WEB source but it has been enhanced to support 8-bit input
**      characters and a very large processing capacity.
**
**      For documentation describing how to use and build this program, 
**      see the 00README.TXT file that accompanies this distribution.
**
**  MODULE CONTENTS
**
**      This module defines the macros used in the BibTeX WEB source.  
**      This file also contains the definitions that determine BibTeX's 
**      processing capacity.
**
**  AUTHORS
**
**      Original WEB translation to C, conversion to "big" (32-bit) capacity,
**      addition of run-time selectable capacity and 8-bit support extensions
**      by:
**
**          Niel Kempson
**          Snowy Owl Systems Limited, Cheltenham, England
**          E-mail: kempson@snowyowl.co.uk
**      
**      8-bit support extensions also by:
**
**          Alejandro Aguilar-Sierra
**          Centro de Ciencias de la Atm\'osfera, 
**          Universidad Nacional Aut\'onoma de M\'exico, M\'exico
**          E-mail: asierra@servidor.unam.mx
**
**  COPYRIGHT
**
**      This implementation copyright (c) 1991-1995 by Niel Kempson
**           and copyright (c) 1995 by Alejandro Aguilar-Sierra.
**
**      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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
**
**      In other words, you are welcome to use, share and improve this
**      program.  You are forbidden to forbid anyone else to use, share
**      and improve what you give them.  Help stamp out software-hoarding!
**
**  ACKNOWLEDGEMENT
**      
**      The original BibTeX was written by Oren Patashnik using Donald 
**      Knuth's WEB system.  This format produces a PASCAL program for 
**      execution and a TeX documented version of the source code. This 
**      program started as a (manual) translation of the WEB source into C.
**  
**  CHANGE LOG
**
**      $Log: bibtex.h,v $
**      Revision 3.71  1996/08/18  20:47:30  kempson
**      Official release 3.71 (see HISTORY file for details).
**
**      Revision 3.70  1996/04/08  10:08:40  kempson
**      Final documentation & cosmetic changes for official release 3.70.
**
**      Revision 3.5  1995/09/24  20:44:37  kempson
**      Many changes for final beta test version.
**
**      Revision 3.4  1995/04/09  22:15:43  kempson
**      Placed under RCS control
**
******************************************************************************
******************************************************************************
*/
#ifndef __BIBTEX_H__
#define __BIBTEX_H__                1


/***************************************************************************
 * WEB section number:   1
 * ~~~~~~~~~~~~~~~~~~~
 * The BANNER string is defined here and should be changed whenever BibTeX
 * is modified.
 ***************************************************************************/
#ifdef SUPPORT_8BIT
# define BANNER     "This is BibTeXu: a UTF-8 Big BibTeX version 0.99d"
#else                           /* NOT SUPPORT_8BIT */
# define BANNER     "This is Big BibTeX version 0.99d"
#endif                          /* SUPPORT_8BIT */


/***************************************************************************
 * WEB section number:   2
 * ~~~~~~~~~~~~~~~~~~~
 * Terminal output goes to the file |TERM_OUT|, while terminal input comes
 * from |TERM_IN|.  On our system, these (system-dependent) files are
 * already opened at the beginning of the program.
 ***************************************************************************/
#define TERM_OUT                    stdout
#define TERM_IN                     stdin

/***************************************************************************
 * WEB section number:   3
 * ~~~~~~~~~~~~~~~~~~~
 * This program uses the term |print| instead of |write| when writing on
 * both the |log_file| and (system-dependent) |term_out| file, and it
 * uses |trace_pr| when in |trace| mode, for which it writes on just the
 * |log_file|.  If you want to change where either set of macros writes
 * to, you should also change the other macros in this program for that
 * set; each such macro begins with |print_| or |trace_pr_|.
 ***************************************************************************/
#define PRINT_NEWLINE               print_a_newline ()

#define PRINT(X) \
            {\
                if (log_file != NULL)\
                    FPRINTF (log_file, X);\
                FPRINTF (TERM_OUT, X);\
            }

#define PRINT2(X, Y) \
            {\
                if (log_file != NULL)\
                    FPRINTF (log_file, X, Y);\
                FPRINTF (TERM_OUT, X, Y);\
            }

#define PRINT3(X, Y, Z) \
            {\
                if (log_file != NULL)\
                    FPRINTF (log_file, X, Y, Z);\
                FPRINTF (TERM_OUT, X, Y, Z);\
            }

#define PRINT4(W, X, Y, Z) \
            {\
                if (log_file != NULL)\
                    FPRINTF (log_file, W, X, Y, Z);\
                FPRINTF (TERM_OUT, W, X, Y, Z);\
            }

#define PRINT_LN(X) \
            {\
                if (log_file != NULL) {\
                    FPRINTF (log_file, X); FPUTC ('\n', log_file);\
                }\
                FPRINTF (TERM_OUT, X); FPUTC('\n', TERM_OUT);\
            }

#define PRINT_LN2(X, Y) \
            {\
                if (log_file != NULL) {\
                    FPRINTF (log_file, X, Y); FPUTC ('\n', log_file);\
                }\
                FPRINTF (TERM_OUT, X, Y); FPUTC('\n', TERM_OUT);\
            }

#define PRINT_LN3(X, Y, Z) \
            {\
                if (log_file != NULL) {\
                    FPRINTF (log_file, X, Y, Z); FPUTC ('\n', log_file);\
                }\
                FPRINTF (TERM_OUT, X, Y, Z); FPUTC('\n', TERM_OUT);\
            }

#define PRINT_LN4(W, X, Y, Z) \
            {\
                if (log_file != NULL) {\
                    FPRINTF (log_file, W, X, Y, Z); FPUTC ('\n', log_file);\
                }\
                FPRINTF (TERM_OUT, W, X, Y, Z); FPUTC('\n', TERM_OUT);\
            }

#define TRACE_PR(X) \
            if (log_file != NULL) FPRINTF (log_file, X);

#define TRACE_PR2(X, Y) \
            if (log_file != NULL) FPRINTF (log_file, X, Y);

#define TRACE_PR3(X, Y, Z) \
            if (log_file != NULL) FPRINTF (log_file, X, Y, Z);

#define TRACE_PR_LN(X) \
            {\
                if (log_file != NULL) {\
                    FPRINTF (log_file, X);  FPUTC ('\n', log_file);\
                }\
            }

#define TRACE_PR_LN2(X, Y) \
            {\
                if (log_file != NULL) {\
                    FPRINTF (log_file, X, Y); FPUTC ('\n', log_file);\
                }\
            }

#define TRACE_PR_LN3(X, Y, Z) \
            {\
                if (log_file != NULL) {\
                    FPRINTF (log_file, X, Y, Z); FPUTC ('\n', log_file);\
                }\
            }

#define TRACE_PR_NEWLINE \
            {\
                if (log_file != NULL)\
                    FPUTC ('\n', log_file);\
            }


/***************************************************************************
 * WEB section number:   4
 * ~~~~~~~~~~~~~~~~~~~
 * Some of the code is intended to be used only when diagnosing the strange
 * behaviour that sometimes occurs when BibTeX is being installed or when
 * system wizards are fooling around with BibTeX without quite knowing what
 * they are doing. Such code will not normally be compiled; it is delimited
 * by the preprocessor conditionals `#ifdef DEBUG ... #endif'. Similarly,
 * there is some conditional code delimited by `#ifdef STAT ... #endif'
 * that is intended only for use when statistics are to be kept about
 * BibTeX's memory/CPU usage, and there is conditional code delimited by
 * `#ifdef TRACE ... #endif' that is intended to be a trace facility for
 * use mainly when debugging .BST files.
 ***************************************************************************/
#define DEBUG                       1
#define STAT                        1
#define TRACE                       1

/***************************************************************************
 * WEB section number:   9
 * ~~~~~~~~~~~~~~~~~~~
 * Here are some macros for common programming idioms.
 ***************************************************************************/
#define INCR(X)                     ++(X)
#define DECR(X)                     --(X)
#define LOOP                        while (TRUE)
#define DO_NOTHING                  ;
#define EMPTY                       0
#define ANY_VALUE                   0

/***************************************************************************
 * WEB section number:   14
 * ~~~~~~~~~~~~~~~~~~~
 * These parameters may be changed at compile time to extend or reduce
 * BiBTeX's capacity. They are set to accommodate a maximum of about 750
 * cites when used with the standard styles.
 ***************************************************************************/
#define MIN_PRINT_LINE              3
#define MAX_PRINT_LINE              79
#define AUX_STACK_SIZE              20
#define MAX_BIB_FILES               20

#define BUF_SIZE                   10000
#define MAX_CITES                  750
#define MAX_FIELDS                 5000
#define MAX_STRINGS                4000
#define POOL_SIZE                  65000L

#define MIN_CROSSREFS               2
#define WIZ_FN_SPACE                3000
#define SINGLE_FN_SPACE             50
#define ENT_STR_SIZE                100
#define GLOB_STR_SIZE               1000
#define LIT_STK_SIZE                50


/***************************************************************************
 * WEB section number:   15
 * ~~~~~~~~~~~~~~~~~~~
 * These parameters can also be changed at compile time, but they're
 * needed to define some WEB numeric macros so they must be defined
 * themselves.
 ***************************************************************************/
#define HASH_SIZE                  5000

#ifdef MSDOS
# define FILE_NAME_SIZE             64
#else                           /* NOT MSDOS */
# define FILE_NAME_SIZE             255
#endif                          /* MSDOS */

#define MAX_GLOB_STRS               10

/***************************************************************************
 * WEB section number:   18
 * ~~~~~~~~~~~~~~~~~~~
 * A global variable called |history| will contain one of four values at
 * the end of every run: |spotless| means that no unusual messages were
 * printed; |warning_message| means that a message of possible interest
 * was printed but no serious errors were detected; |error_message| means
 * that at least one error was found; |fatal_message| means that the
 * program terminated abnormally. The value of |history| does not
 * influence the behavior of the program; it is simply computed for the
 * convenience of systems that might want to use such information.
 ***************************************************************************/
#define SPOTLESS                    0
#define WARNING_MESSAGE             1
#define ERROR_MESSAGE               2
#define FATAL_MESSAGE               3

/***************************************************************************
 * WEB section number:   23
 * ~~~~~~~~~~~~~~~~~~~
 * We shall use the |text_char| to stand for the data type of the
 * characters that are converted to and from |ASCIICode_T| when they are
 * input and output. We shall also assume that |text_char| consists of the
 * elements |chr[FIRST_TEXT_CHAR]| through |chr[LAST_TEXT_CHAR]| inclusive.
 * The following definitions should be adjusted if necessary.
 ***************************************************************************/
#define FIRST_TEXT_CHAR             0
#define LAST_TEXT_CHAR              255

#ifdef SUPPORT_8BIT
#define LAST_ASCII_CHAR             255
#else
#define LAST_ASCII_CHAR             127
#endif                          /* SUPPORT_8BIT */


/***************************************************************************
 * WEB section number:   26
 * ~~~~~~~~~~~~~~~~~~~
 * Some of the ASCII codes without visible characters have been given
 * symbolic names in this program because they are used with a special
 * meaning.  The |tab| character may be system dependent.
 ***************************************************************************/
#define NULL_CODE                   0
#define TAB                         9
#define SPACE                       32
#define INVALID_CODE                127

/***************************************************************************
 * WEB section number:   29
 * ~~~~~~~~~~~~~~~~~~~
 * Also, various characters are given symbolic names; all the ones this
 * program uses are collected here.  We use the sharp sign as the
 * |concat_char|, rather than something more natural (like an ampersand),
 * for uniformity of database syntax (ampersand is a valid character in
 * identifiers).
 ***************************************************************************/
#define DOUBLE_QUOTE                '"'
#define NUMBER_SIGN                 '#'
#define COMMENT                     '%'
#define SINGLE_QUOTE                '\''
#define LEFT_PAREN                  '('
#define RIGHT_PAREN                 ')'
#define COMMA                       ','
#define MINUS_SIGN                  '-'
#define EQUALS_SIGN                 '='
#define AT_SIGN                     '@'
#define LEFT_BRACE                  '{'
#define RIGHT_BRACE                 '}'
#define PERIOD                      '.'
#define QUESTION_MARK               '?'
#define EXCLAMATION_MARK            '!'
#define TIE                         '~'
#define HYPHEN                      '-'
#define STAR                        '*'
#define CONCAT_CHAR                 '#'
#define COLON                       ':'
#define BACKSLASH                   '\\'

/***************************************************************************
 * WEB section number:   31
 * ~~~~~~~~~~~~~~~~~~~~
 * Every character has two types of the lexical classifications.  The
 * first type is general, and the second type tells whether the character
 * is legal in identifiers.
 ***************************************************************************/
#define ILLEGAL                     0
#define WHITE_SPACE                 1
#define ALPHA                       2
#define NUMERIC                     3
#define SEP_CHAR                    4
#define OTHER_LEX                   5
#define LAST_LEX                    5
#define ILLEGAL_ID_CHAR             0
#define LEGAL_ID_CHAR               1

/***************************************************************************
 * WEB section number:   35
 * ~~~~~~~~~~~~~~~~~~~~
 * Now we initialize the system-dependent |char_width| array, for which
 * |space| is the only |white_space| character given a nonzero printing
 * width.  The widths here are taken from Stanford's June '87 cmr10 font
 * and represent hundredths of a point (rounded), but since they're used
 * only for relative comparisons, the units have no meaning.
 ***************************************************************************/
#define SS_WIDTH                    500
#define AE_WIDTH                    722
#define OE_WIDTH                    778
#define UPPER_AE_WIDTH              903
#define UPPER_OE_WIDTH              1014

/***************************************************************************
 * WEB section number:   44
 * ~~~~~~~~~~~~~~~~~~~~
 * When something in the program wants to be bigger or something out
 * there wants to be smaller, it's time to call it a run.  Here's the
 * first of several macros that have associated procedures so that they
 * produce less inline code.
 ***************************************************************************/
#define BIBTEX_OVERFLOW(X, Y)              {\
    print_overflow ();\
    PRINT_LN3 ("%s%ld\n", (X), (long) (Y));\
    longjmp (Close_Up_Shop_Flag, 1);}

/***************************************************************************
 * WEB section number:   45
 * ~~~~~~~~~~~~~~~~~~~~
 * When something happens that the program thinks is impossible, call the
 * maintainer.
 ***************************************************************************/
#define CONFUSION(X)                {\
            PRINT (X); print_confusion();\
            longjmp (Close_Up_Shop_Flag, 1);}
#define CONFUSION2(X, Y)            {\
            PRINT2 (X, Y); print_confusion();\
            longjmp (Close_Up_Shop_Flag, 1);}

/***************************************************************************
 * WEB section number:   50
 * ~~~~~~~~~~~~~~~~~~~~
 * These macros send a string in |str_pool| to an output file.
 ***************************************************************************/
#define MAX_POP                     3
#define PRINT_POOL_STR(X)           print_a_pool_str(X)
#define TRACE_PR_POOL_STR(X)        { out_pool_str(log_file, X);}

/***************************************************************************
 * WEB section number:  52
 * ~~~~~~~~~~~~~~~~~~~
 * Several of the elementary string operations are performed using WEB
 * macros instead of using PASCAL procedures, because many of the operations
 * are done quite frequently and we want to avoid the overhead of procedure
 * calls. For example, here's a simple macro that computes the length of a
 * string.
 ***************************************************************************/
#define LENGTH(s)                   (str_start[(s)+1] - str_start[s])

/***************************************************************************
 * WEB section number:   53
 * ~~~~~~~~~~~~~~~~~~~
 * Strings are created by appending character codes to |str_pool|. The macro
 * called |append_char|, defined here, does not check to see if the value
 * of |pool_ptr| is too high; this test is supposed to be made before
 * |append_char| is used.
 ***************************************************************************/
#define APPEND_CHAR(X)              {	str_pool[pool_ptr] = (X);\
                                     INCR(pool_ptr);}
#define STR_ROOM(X)                 {while((pool_ptr+(X))>Pool_Size)\
                                        pool_overflow();}

/***************************************************************************
 * WEB section number:   55
 * ~~~~~~~~~~~~~~~~~~~
 * These macros destroy an recreate the string at the end of the pool.
 ***************************************************************************/
#define FLUSH_STRING                {DECR(str_ptr);\
                                     pool_ptr=str_start[str_ptr];}
#define UNFLUSH_STRING              {INCR(str_ptr);\
                                     pool_ptr=str_start[str_ptr];}

/***************************************************************************
 * WEB section number:  62
 * ~~~~~~~~~~~~~~~~~~~
 * This system-independent procedure converts upper-case characters to
 * lower case for the specified part of |buf|.  It is system independent
 * because it uses only the internal representation for characters.
 ***************************************************************************/
#define CASE_DIFFERENCE             ('a' - 'A')

/***************************************************************************
 * WEB section number:   64
 * ~~~~~~~~~~~~~~~~~~~
 * All static strings that BibTeX might have to search for, generally
 * identifiers, are stored and retrieved by means of a fairly standard
 * hash-table algorithm (but slightly altered here) called the method of
 * ``coalescing lists'' (cf.\ Algorithm 6.4C in The Art of Computer
 * Programming).  Once a string enters the table, it is never removed.
 * The actual sequence of characters forming a string is stored in the
 * |str_pool| array.
 ***************************************************************************/
#define HASH_BASE                   (EMPTY + 1)
#define HASH_MAX                    (HASH_BASE + Hash_Size - 1)
#define HASH_IS_FULL                ((hash_used) == (HASH_BASE))
#define TEXT_ILK                    0
#define INTEGER_ILK                 1
#define AUX_COMMAND_ILK             2
#define AUX_FILE_ILK                3
#define BST_COMMAND_ILK             4
#define BST_FILE_ILK                5
#define BIB_FILE_ILK                6
#define FILE_EXT_ILK                7
#define FILE_AREA_ILK               8
#define CITE_ILK                    9
#define LC_CITE_ILK                 10
#define BST_FN_ILK                  11
#define BIB_COMMAND_ILK             12
#define MACRO_ILK                   13
#define CONTROL_SEQ_ILK             14
#define LAST_ILK                    14

/***************************************************************************
 * WEB section number:   68
 * ~~~~~~~~~~~~~~~~~~~
 * Here is the subroutine that searches the the hash table for a (string,
 * str_ilk) pair, where the string is of length l >= 0 and appears in
 * |buffer[j..(j+l-1)]|. If it finds the pair, it returns the corresponding
 * hash table location and sets the global variable |hash_found| to |TRUE|.
 * Otherwise is sets |hash_found| to |FALSE|, and if the parameter
 * |insert_it| is |TRUE|, it inserts the pair into the hash table, inserts
 * the string into |str_pool| if not previously encountered, and returns its
 * location. Note that two different pairs can have the same string but
 * different |str_ilks|, in which case the second pair encountered, if
 * |insert_it| were |TRUE|, would be inserted into the hash table though its
 * string wouldn't be inserted into |str_pool| because it would already be
 * there.
 ***************************************************************************/
#define MAX_HASH_VALUE              (Hash_Prime + Hash_Prime - 2 + 127)
#define DO_INSERT                   TRUE
#define DONT_INSERT                 FALSE

/***************************************************************************
 * WEB section number:   73
 * ~~~~~~~~~~~~~~~~~~~
 * The longest pre-defined string determines type definitions used to
 * insert the pre-defined strings into |str_pool|.
 * Set to accommodate the longest translations of the environment variables.
 ***************************************************************************/
#define LONGEST_PDS                 MAX_FILE_NAME

/***************************************************************************
 * WEB section number:   78
 * ~~~~~~~~~~~~~~~~~~~
 * These constants all begin with |n_| and are used for the |case|
 * statement that determines which command to execute.  The variable
 * |command_num| is set to one of these and is used to do the branching,
 * but it must have the full |integer| range because at times it can
 * assume an arbitrary |ilk_info| value (though it will be one of the
 * values here when we actually use it).
 ***************************************************************************/
#define N_AUX_BIBDATA               0
#define N_AUX_BIBSTYLE              1
#define N_AUX_CITATION              2
#define N_AUX_INPUT                 3

#define N_BST_ENTRY                 0
#define N_BST_EXECUTE               1
#define N_BST_FUNCTION              2
#define N_BST_INTEGERS              3
#define N_BST_ITERATE               4
#define N_BST_MACRO                 5
#define N_BST_READ                  6
#define N_BST_REVERSE               7
#define N_BST_SORT                  8
#define N_BST_STRINGS               9

#define N_BIB_COMMENT               0
#define N_BIB_PREAMBLE              1
#define N_BIB_STRING                2

/***************************************************************************
 * WEB section number:   80
 * ~~~~~~~~~~~~~~~~~~~
 * This section describes the various |buffer| scanning routines.  The
 * two global variables |buf_ptr1| and |buf_ptr2| are used in scanning an
 * input line.  Between scans, |buf_ptr1| points to the first character
 * of the current token and |buf_ptr2| points to that of the next.  The
 * global variable |last|, set by the function |input_ln|, marks the end
 * of the current line; it equals 0 at the end of the current file.  All
 * the procedures and functions in this section will indicate an
 * end-of-line when it's the end of the file.
 ***************************************************************************/
#define TOKEN_LEN                   (buf_ptr2 - buf_ptr1)
#define SCAN_CHAR                   buffer[buf_ptr2]

/***************************************************************************
 * WEB section number:  81
 * ~~~~~~~~~~~~~~~~~~~
 * These macros send the current token, in |buffer[buf_ptr1]| to
 * |buffer[buf_ptr2-1]|, to an output file.
 ***************************************************************************/
#define PRINT_TOKEN                 print_a_token ();
#define TRACE_PR_TOKEN              out_token (log_file);

/***************************************************************************
 * WEB section number:   89
 * ~~~~~~~~~~~~~~~~~~~
 * These are the possible values for |scan_result|; they're set by the
 * |scan_identifier| procedure and are described in the next section.
 ***************************************************************************/
#define ID_NULL                     0
#define SPECIFIED_CHAR_ADJACENT     1
#define OTHER_CHAR_ADJACENT         2
#define WHITE_ADJACENT              3

/***************************************************************************
 * WEB section number:  91
 * ~~~~~~~~~~~~~~~~~~~
 * The next two procedures scan for an integer, setting the global
 * variable |token_value| to the corresponding integer.
 ***************************************************************************/
#define CHAR_VALUE                  (SCAN_CHAR - '0')

/***************************************************************************
 * WEB section number:  93
 * ~~~~~~~~~~~~~~~~~~~
 * This procedure scans for an integer, stopping at the first nondigit;
 * it sets the value of |token_value| accordingly.  It returns |true| if
 * the token was a legal integer (i.e., consisted of an optional
 * |minus_sign| followed by one or more digits).
 ***************************************************************************/
#define NEGATIVE                    (sign_length == 1)

/***************************************************************************
 * WEB section number:  98
 * ~~~~~~~~~~~~~~~~~~~
 * I mean, this is truly disgraceful ...
 *
 * Note: The |term_out| file is system dependent.
 ***************************************************************************/
#define SAM_YOU_MADE_THE_FILE_NAME_TOO {\
            sam_too_long_file_name_print ();\
            goto Aux_Not_Found_Label;}

/***************************************************************************
 * WEB section number:  99
 * ~~~~~~~~~~~~~~~~~~~
 * We've abused the user enough for one section; suffice it to
 * say here that most of what we said last module still applies.
 * Note: The |term_out| file is system dependent.
 ***************************************************************************/
#define SAM_YOU_MADE_THE_FILE_NAME_WRON {\
            sam_wrong_file_name_print ();\
            goto Aux_Not_Found_Label;}

/***************************************************************************
 * WEB section number:  104
 * ~~~~~~~~~~~~~~~~~~~
 * Here we set up definitions and declarations for files opened in this
 * section.  Each element in |aux_list| (except for
 * |aux_list[aux_stack_size]|, which is always unused) is a pointer to
 * the appropriate |str_pool| string representing the \.{.aux} file name.
 * The array |aux_file| contains the corresponding \PASCAL\ |file|
 * variables.
 ***************************************************************************/
#define CUR_AUX_STR                 aux_list[aux_ptr]
#define CUR_AUX_FILE                aux_file[aux_ptr]
#define CUR_AUX_LINE                aux_ln_stack[aux_ptr]

/***************************************************************************
 * WEB section number:  111
 * ~~~~~~~~~~~~~~~~~~~
 * When we find a bug, we print a message and flush the rest of the line.
 * This macro must be called from within a procedure that has an |exit|
 * label.
 ***************************************************************************/
#define AUX_ERR_RETURN              {aux_err_print(); goto Exit_Label;}

/***************************************************************************
 * WEB section number:  112
 * ~~~~~~~~~~~~~~~~~~~
 * Here are a bunch of macros whose print statements are used at least
 * twice.  Thus we save space by making the statements procedures.  This
 * macro complains when there's a repeated command that's to be used just
 * once.
 ***************************************************************************/
#define AUX_ERR_ILLEGAL_ANOTHER(X)  {aux_err_illegal_another_print (X);\
                                     AUX_ERR_RETURN;}

/***************************************************************************
 * WEB section number:  113
 * ~~~~~~~~~~~~~~~~~~~
 * This one complains when a command is missing its |right_brace|.
 ***************************************************************************/
#define AUX_ERR_NO_RIGHT_BRACE      {\
            PRINT2 ("No \"%c\"", xchr[RIGHT_BRACE]);\
            AUX_ERR_RETURN;}

/***************************************************************************
 * WEB section number:  114
 * ~~~~~~~~~~~~~~~~~~~
 * This one complains when a command has stuff after its |right_brace|.
 ***************************************************************************/
#define AUX_ERR_STUFF_AFTER_RIGHT_BRACE {\
            PRINT2 ("Stuff after \"%c\"", xchr[RIGHT_BRACE]);\
            AUX_ERR_RETURN;}

/***************************************************************************
 * WEB section number:  115
 * ~~~~~~~~~~~~~~~~~~~
 * And this one complains when a command has white space in its argument.
 ***************************************************************************/
#define AUX_ERR_WHITE_SPACE_IN_ARGUMENT {\
            PRINT ("White space in argument");\
            AUX_ERR_RETURN;}

/***************************************************************************
 * WEB section number:  117
 * ~~~~~~~~~~~~~~~~~~~
 * Here we introduce some variables for processing a \.{\\bibdata}
 * command.  Each element in |bib_list| (except for
 * |bib_list[max_bib_files]|, which is always unused) is a pointer to the
 * appropriate |str_pool| string representing the \.{.bib} file name.
 * The array |bib_file| contains the corresponding \PASCAL\ |file|
 * variables.
 ***************************************************************************/
#define CUR_BIB_STR                 bib_list[bib_ptr]
#define CUR_BIB_FILE                bib_file[bib_ptr]

/***************************************************************************
 * WEB section number:  122
 * ~~~~~~~~~~~~~~~~~~~
 * This macro is very similar to aux_err but it complains specifically about
 * opening a file for a \bibdata command.
 ***************************************************************************/
#define OPEN_BIBDATA_AUX_ERR(X)     {\
            PRINT (X);\
            print_bib_name();\
            AUX_ERR_RETURN;}

/***************************************************************************
 * WEB section number:  129
 * ~~~~~~~~~~~~~~~~~~~
 * Here we introduce some variables for processing a \.{\\citation}
 * command.  Each element in |cite_list| (except for
 * |cite_list[Max_Cites]|, which is always unused) is a pointer to the
 * appropriate |str_pool| string.  The cite-key list is kept in order of
 * occurrence with duplicates removed.
 ***************************************************************************/
#define CUR_CITE_STR                cite_list[cite_ptr]

/***************************************************************************
 * WEB section number:  133
 * ~~~~~~~~~~~~~~~~~~~
 * We must check if (the lower-case version of) this cite key has been
 * previously encountered, and proceed accordingly.  The alias kludge
 * helps make the stack space not overflow on some machines.
 ***************************************************************************/
#define EX_BUF1                     ex_buf

/***************************************************************************
 * WEB section number:  144
 * ~~~~~~~~~~~~~~~~~~~
 * We must complain if anything's amiss.
 ***************************************************************************/
#define AUX_END_ERR(X)              {\
            aux_end1_err_print();\
            PRINT (X);\
            aux_end2_err_print();}

/***************************************************************************
 * WEB section number:   149
 * ~~~~~~~~~~~~~~~~~~~
 * When there's a serious error parsing the .bst file, we flush the rest of
 * the current command; a blank line is assumed to mark the end of a command
 * (but for the purposes of error recovery only). Thus, error recovery will
 * be better if style designers leave blank lines between .bst commands.
 * This macro must be called from within a procedure that has an 'exit'
 * label.
 ***************************************************************************/
#define BST_ERR_PRINT_AND_LOOK_FOR_BLAN {\
            bst_err_print_and_look_for_blan();\
            goto Exit_Label;}

#define BST_ERR(X)                  {\
            PRINT (X);\
            bst_err_print_and_look_for_blan ();\
            goto Exit_Label;}

#define BST_ERR2(X, Y)              {\
            PRINT2 (X, Y);\
            bst_err_print_and_look_for_blan ();\
            goto Exit_Label;}

/***************************************************************************
 * WEB section number:   150
 * ~~~~~~~~~~~~~~~~~~~
 * When there's a harmless error parsing the .bst file (harmless
 * syntactically, at least) we give just a warning message.
 ***************************************************************************/
#define BST_WARN(X)                 {\
            PRINT (X); bst_warn_print();}

/***************************************************************************
 * WEB section number:   153
 * ~~~~~~~~~~~~~~~~~~~
 * It's often illegal to end a .bst command in certain places, and this is
 * where we come to check.
 ***************************************************************************/
#define EAT_BST_WHITE_AND_EOF_CHECK(X)  {\
            if (! eat_bst_white_space()) {\
                PRINT (X); BST_ERR(X);}}

/***************************************************************************
 * WEB section number:   156
 * ~~~~~~~~~~~~~~~~~~~
 * We need data structures for the function definitions, the entry
 * variables, the global variables, and the actual entries corresponding
 * to the cite-key list.  First we define the classes of `function's used.
 * Functions in all classes are of |bst_fn_ilk| except for |int_literal|s,
 * which are of |integer_ilk|; and |str_literal|s, which are of
 * |text_ilk|.
 ***************************************************************************/
#define BUILT_IN                    0
#define WIZ_DEFINED                 1
#define INT_LITERAL                 2
#define STR_LITERAL                 3
#define FIELD                       4
#define INT_ENTRY_VAR               5
#define STR_ENTRY_VAR               6
#define INT_GLOBAL_VAR              7
#define STR_GLOBAL_VAR              8
#define LAST_FN_CLASS               8

/***************************************************************************
 * WEB section number:  160
 * ~~~~~~~~~~~~~~~~~~~
 * Besides the function classes, we have types based on \BibTeX's
 * capacity limitations and one based on what can go into the array
 * |wiz_functions| explained below.
 ***************************************************************************/
#define QUOTE_NEXT_FN               (HASH_BASE - 1)
#define END_OF_DEF                  (HASH_MAX + 1)

/***************************************************************************
 * WEB section number:  161
 * ~~~~~~~~~~~~~~~~~~~
 * We store information about the \.{.bst} functions in arrays the same
 * size as the hash-table arrays and in locations corresponding to their
 * hash-table locations.  The two arrays |fn_info| (an alias of
 * |ilk_info| described earlier) and |fn_type| accomplish this: |fn_type|
 * specifies one of the above classes, and |fn_info| gives information
 * dependent on the class.
 ***************************************************************************/
#define FN_INFO                     ilk_info
#define MISSING                     EMPTY

/***************************************************************************
 * WEB section number:  166
 * ~~~~~~~~~~~~~~~~~~~
 * This macro is used to scan all .bst identifiers. The argument supplies
 * .bst command name. The associated procedure simply prints an error
 * message.
 ***************************************************************************/
#define BST_IDENTIFIER_SCAN(X)      {\
        scan_identifier (RIGHT_BRACE, COMMENT, COMMENT);\
        if ((scan_result == WHITE_ADJACENT) \
            || (scan_result == SPECIFIED_CHAR_ADJACENT)) {DO_NOTHING;}\
        else {bst_id_print(); BST_ERR(X)}}

/***************************************************************************
 * WEB section number:  167
 * ~~~~~~~~~~~~~~~~~~~
 * This macro just makes sure we're at a |left_brace|.
 ***************************************************************************/
#define BST_GET_AND_CHECK_LEFT_BRACE(X) {\
        if (SCAN_CHAR != LEFT_BRACE) \
                {bst_left_brace_print(); BST_ERR(X);}\
        INCR (buf_ptr2);}

/***************************************************************************
 * WEB section number:  168
 * ~~~~~~~~~~~~~~~~~~~
 * This macro just makes sure we're at a |right_brace|.
 ***************************************************************************/
#define BST_GET_AND_CHECK_RIGHT_BRACE(X)        {\
        if (SCAN_CHAR != RIGHT_BRACE) \
                {bst_right_brace_print(); BST_ERR(X);}\
        INCR (buf_ptr2);}

/***************************************************************************
 * WEB section number:  169
 * ~~~~~~~~~~~~~~~~~~~
 * This macro complains if we've already encountered a function to be
 * inserted into the hash table.
 ***************************************************************************/
#define CHECK_FOR_ALREADY_SEEN_FUNCTION(X)      {\
        if (hash_found) {\
            already_seen_function_print(X);\
            goto Exit_Label;}}

/***************************************************************************
 * WEB section number:  183
 * ~~~~~~~~~~~~~~~~~~~
 * We're about to start scanning tokens in a function definition.  When a
 * function token is illegal, we skip until it ends; a |white_space|
 * character, an end-of-line, a |right_brace|, or a |comment| marks the
 * end of the current token.
 ***************************************************************************/
#define SKIP_TOKEN(X)               {\
            PRINT (X);\
            skip_token_print ();\
            goto Next_Token_Label;}
#define SKIP_TOKEN2(X, Y)           {\
            PRINT2 (X, Y);\
            skip_token_print ();\
            goto Next_Token_Label;}

/***************************************************************************
 * WEB section number:  184
 * ~~~~~~~~~~~~~~~~~~~
 * This macro is similar to the last one but is specifically for
 * recursion in a |wiz_defined| function, which is illegal; it helps save
 * space.
 ***************************************************************************/
#define SKIP_RECURSIVE_TOKEN        { print_recursion_illegal (); \
                                      goto Next_Token_Label;}

/***************************************************************************
 * WEB section number:  185
 * ~~~~~~~~~~~~~~~~~~~
 * Here's another macro for saving some space when there's a problem with
 * a token.
 ***************************************************************************/
#define SKIP_TOKEN_UNKNOWN_FUNCTION {skp_token_unknown_function_prin ();\
                                     goto Next_Token_Label;}

/***************************************************************************
 * WEB section number:  186
 * ~~~~~~~~~~~~~~~~~~~
 * And another.
 ***************************************************************************/
#define SKIP_TOKEN_ILLEGAL_STUFF_AFTER {\
            skip_illegal_stuff_after_token ();\
            goto Next_Token_Label;}

/***************************************************************************
 * WEB section number:  194
 * ~~~~~~~~~~~~~~~~~~~
 * This module marks the implicit function as being quoted, generates a
 * name, and stores it in the hash table.  This name is strictly internal
 * to this program, starts with a |single_quote| (since that will make
 * this function name unique), and ends with the variable |impl_fn_num|
 * converted to ASCII.  The alias kludge helps make the stack space not
 * overflow on some machines.
 ***************************************************************************/
#define EX_BUF2                     ex_buf

/***************************************************************************
 * WEB section number:  197
 * ~~~~~~~~~~~~~~~~~~~
 * This module appends a character to |int_buf| after checking to make
 * sure it will fit; for use in |int_to_ASCII|.
 ***************************************************************************/
#define APPEND_INT_CHAR(X)          {\
            if (int_ptr == Buf_Size)\
                { buffer_overflow ();}\
            int_buf[int_ptr] = (X);\
            INCR (int_ptr); }

/***************************************************************************
 * WEB section number:  216
 * ~~~~~~~~~~~~~~~~~~~
 * Here we insert the just found |int_global_var| name into the hash
 * table and record it as an |int_global_var|.  Also, we initialize it by
 * setting |fn_info[fn_loc]| to 0.
 ***************************************************************************/
#define END_OF_STRING               INVALID_CODE

/***************************************************************************
 * WEB section number:  219
 * ~~~~~~~~~~~~~~~~~~~
 * These global variables are used ...
 ***************************************************************************/
#define UNDEFINED                   (HASH_MAX + 1)

/***************************************************************************
 * WEB section number:  221
 * ~~~~~~~~~~~~~~~~~~~
 * When there's a serious error parsing a \.{.bib} file, we flush
 * everything up to the beginning of the next entry.
 ***************************************************************************/
#define BIB_ERR(X)                  {\
            PRINT (X);\
            bib_err_print ();\
            goto Exit_Label;}
#define BIB_ERR2(X, Y)              {\
            PRINT2 (X, Y);\
            bib_err_print ();\
            goto Exit_Label;}
#define BIB_ERR3(X, Y, Z)                   {\
            PRINT3 (X, Y, Z);\
            bib_err_print ();\
            goto Exit_Label;}

/***************************************************************************
 * WEB section number:  222
 * ~~~~~~~~~~~~~~~~~~~
 * When there's a harmless error parsing a \.{.bib} file, we just give a
 * warning message.  This is always called after other stuff has been
 * printed out.
 ***************************************************************************/
#define BIB_WARN(X)                 {\
            PRINT (X);\
            bib_warn_print ();}
#define BIB_WARN_NEWLINE(X)         {\
            PRINT_LN (X);\
            bib_warn_print ();}

/***************************************************************************
 * WEB section number:  229
 * ~~~~~~~~~~~~~~~~~~~
 * It's often illegal to end a \.{.bib} command in certain places, and
 * this is where we come to check.
 ***************************************************************************/
#define EAT_BIB_WHITE_AND_EOF_CHECK {\
            if (! eat_bib_white_space())\
                {eat_bib_print();\
                goto Exit_Label;}}

/***************************************************************************
 * WEB section number:  230
 * ~~~~~~~~~~~~~~~~~~~
 * And here are a bunch of error-message macros, each called more than
 * once, that thus save space as implemented.  This one is for when one
 * of two possible characters is expected while scanning.
 ***************************************************************************/
#define BIB_ONE_OF_TWO_EXPECTED_ERR(X, Y)       {\
            bib_one_of_two_print (X, Y);\
            goto Exit_Label;}

/***************************************************************************
 * WEB section number:  231
 * ~~~~~~~~~~~~~~~~~~~
 * This one's for an unexpected equals sign.
 ***************************************************************************/
#define BIB_EQUALS_SIGN_EXPECTED_ERR    {\
            bib_equals_sign_print ();\
            goto Exit_Label;}

/***************************************************************************
 * WEB section number:  232
 * ~~~~~~~~~~~~~~~~~~~
 * This complains about unbalanced braces.
 ***************************************************************************/
#define BIB_UNBALANCED_BRACES_ERR       {\
            bib_unbalanced_braces_print ();\
            goto Exit_Label;}

/***************************************************************************
 * WEB section number:  233
 * ~~~~~~~~~~~~~~~~~~~
 * And this one about an overly exuberant field.
 ***************************************************************************/
#define BIB_FIELD_TOO_LONG_ERR      {\
            bib_field_too_long_print ();\
            goto Exit_Label;}

/***************************************************************************
 * WEB section number:  234
 * ~~~~~~~~~~~~~~~~~~~
 * This one is just a warning, not an error.  It's for when something
 * isn't (or might not be) quite right with a macro name.
 ***************************************************************************/
#define MACRO_NAME_WARNING(X)       {\
            macro_warn_print ();\
            BIB_WARN_NEWLINE (X);}

/***************************************************************************
 * WEB section number:  235
 * ~~~~~~~~~~~~~~~~~~~
 * This macro is used to scan all \.{.bib} identifiers.  The argument
 * tells what was happening at the time.  The associated procedure simply
 * prints an error message.
 ***************************************************************************/
#define BIB_IDENTIFIER_SCAN_CHECK(X)    {\
            if ((scan_result == WHITE_ADJACENT) \
                || (scan_result == SPECIFIED_CHAR_ADJACENT)) {DO_NOTHING;}\
            else {bib_id_print(); BIB_ERR (X);}}

/***************************************************************************
 * WEB section number:  247
 * ~~~~~~~~~~~~~~~~~~~
 * The variables for the function
 * |scan_and_store_the_field_value_and_eat_white| must be global since
 * the functions it calls use them too.  The alias kludge helps make the
 * stack space not overflow on some machines.
 ***************************************************************************/
#define FIELD_VL_STR                ex_buf
#define FIELD_END                   ex_buf_ptr
#define FIELD_START                 ex_buf_xptr

/***************************************************************************
 * WEB section number:  251
 * ~~~~~~~~~~~~~~~~~~~
 * Now we come to the stuff that actually accumulates the field value to
 * be stored.  This module copies a character into |field_vl_str| if it
 * will fit; since it's so low level, it's implemented as a macro.
 ***************************************************************************/
#define COPY_CHAR(X)                {\
            if (FIELD_END == Buf_Size)\
                { BIB_FIELD_TOO_LONG_ERR; }\
            else\
                { FIELD_VL_STR[FIELD_END] = (X);\
                INCR (FIELD_END);}}

/***************************************************************************
 * WEB section number:  252
 * ~~~~~~~~~~~~~~~~~~~
 * The \.{.bib}-specific scanning function |compress_bib_white| skips
 * over |white_space| characters within a string until hitting a nonwhite
 * character; in fact, it does everything |eat_bib_white_space| does, but
 * it also adds a |space| to |field_vl_str|.  This function is never
 * called if there are no |white_space| characters (or ends-of-line) to
 * be scanned (though the associated macro might be).  The function
 * returns |false| if there is a serious syntax error.
 ***************************************************************************/
#define CHECK_FOR_AND_COMPRESS_BIB_WHIT {\
            if ((lex_class[SCAN_CHAR] == WHITE_SPACE) || (buf_ptr2 == last)){\
                if (! compress_bib_white ()) { goto Exit_Label;}}}

/***************************************************************************
 * WEB section number:  264
 * ~~~~~~~~~~~~~~~~~~~
 * If the cross-referenced entry isn't already on |cite_list| we add it
 * (at least temporarily); if it is already on |cite_list| we update the
 * cross-reference count, if necessary.  Note that |all_entries| is
 * |false| here.  The alias kludge helps make the stack space not
 * overflow on some machines.
 ***************************************************************************/
#define EXTRA_BUF                   out_buf

/***************************************************************************
 * WEB section number:  267
 * ~~~~~~~~~~~~~~~~~~~
 * The lower-case version of this database key must correspond to one in
 * |cite_list|, or else |all_entries| must be |true|, if this entry is to
 * be included in the reference list.  Accordingly, this module sets
 * |store_entry|, which determines whether the relevant information for
 * this entry is stored.  The alias kludge helps make the stack space not
 * overflow on some machines.
 ***************************************************************************/
#define EX_BUF3                     ex_buf

/***************************************************************************
 * WEB section number:  270
 * ~~~~~~~~~~~~~~~~~~~
 * This module, a simpler version of the
 * |find_cite_locs_for_this_cite_key| function, exists primarily to
 * compute |lc_xcite_loc|.  When this code is executed we have
 * |(all_entries) and (entry_cite_ptr >= all_marker) and (not
 * entry_exists[entry_cite_ptr])|.  The alias kludge helps make the stack
 * space not overflow on some machines.
 ***************************************************************************/
#define EX_BUF4                     ex_buf
#define EX_BUF4_PTR                 ex_buf_ptr

/***************************************************************************
 * WEB section number:  277
 * ~~~~~~~~~~~~~~~~~~~
 * Occasionally we need to figure out the hash-table location of a given
 * cite-key string and its lower-case equivalent.  This function does
 * that.  To perform the task it needs to borrow a buffer, a need that
 * gives rise to the alias kludge---it helps make the stack space not
 * overflow on some machines (and while it's at it, it'll borrow a
 * pointer, too).  Finally, the function returns |true| if the cite key
 * exists on |cite_list|, and its sets |cite_hash_found| according to
 * whether or not it found the actual version (before |lower_case|ing) of
 * the cite key; however, its {\sl raison d'\^$\mkern-8mu$etre\/}
 * (literally, ``to eat a raisin'') is to compute |cite_loc| and
 * |lc_cite_loc|.
 ***************************************************************************/
#define EX_BUF5                     ex_buf
#define EX_BUF5_PTR                 ex_buf_ptr

/***************************************************************************
 * WEB section number:  289
 * ~~~~~~~~~~~~~~~~~~~
 * The array |sorted_cites| initially specifies that the entries are to
 * be processed in order of cite-key occurrence.  The \.{sort} command
 * may change this to whatever it likes (which, we hope, is whatever the
 * style-designer instructs it to like).  We make |sorted_cites| an alias
 * to save space; this works fine because we're done with |cite_info|.
 ***************************************************************************/
#define SORTED_CITES                cite_info

/***************************************************************************
 * WEB section number:  291
 * ~~~~~~~~~~~~~~~~~~~
 * Where |lit_stk_loc| is a stack location, and where |stk_type| gives
 * one of the three types of literals (an integer, a string, or a
 * function) or a special marker.  If a |lit_stk_type| element is a
 * |stk_int| then the corresponding |lit_stack| element is an integer; if
 * a |stk_str|, then a pointer to a |str_pool| string; and if a |stk_fn|,
 * then a pointer to the function's hash-table location.  However, if the
 * literal should have been a |stk_str| that was the value of a field
 * that happened to be |missing|, then the special value
 * |stk_field_missing| goes on the stack instead; its corresponding
 * |lit_stack| element is a pointer to the field-name's string.  Finally,
 * |stk_empty| is the type of a literal popped from an empty stack.
 ***************************************************************************/
#define STK_INT                     0
#define STK_STR                     1
#define STK_FN                      2
#define STK_FIELD_MISSING           3
#define STK_EMPTY                   4
#define LAST_LIT_TYPE               4

/***************************************************************************
 * WEB section number:  293
 * ~~~~~~~~~~~~~~~~~~~
 * When there's an error while executing \.{.bst} functions, what we do
 * depends on whether the function is messing with the entries.
 * Furthermore this error is serious enough to classify as an
 * |error_message| instead of a |warning_message|.  These messages (that
 * is, from |bst_ex_warn|) are meant both for the user and for the style
 * designer while debugging.
 ***************************************************************************/
#define BST_EX_WARN(X)              {\
            PRINT (X); bst_ex_warn_print ();}
#define BST_EX_WARN2(X, Y)          {\
            PRINT2 (X, Y); bst_ex_warn_print ();}

/***************************************************************************
 * WEB section number:  294
 * ~~~~~~~~~~~~~~~~~~~
 * When an error is so harmless, we print a warning message instead of an
 * error message.
 ***************************************************************************/
#define BST_MILD_EX_WARN(X)                 {\
            PRINT (X); bst_mild_ex_warn_print ();}

/***************************************************************************
 * WEB section number:  301
 * ~~~~~~~~~~~~~~~~~~~
 * The function |less_than| compares the two \.{sort.key\$}s indirectly
 * pointed to by its arguments and returns |true| if the first argument's
 * \.{sort.key\$} is lexicographically less than the second's (that is,
 * alphabetically earlier).  In case of ties the function compares the
 * indices |arg1| and |arg2|, which are assumed to be different, and
 * returns |true| if the first is smaller.  This function uses
 * |ASCII_code|s to compare, so it might give ``interesting'' results
 * when handling nonletters.
 ***************************************************************************/
#define COMPARE_RETURN(X)           {\
            less_than = (X);\
            goto Exit_Label;}

/***************************************************************************
 * WEB section number:  302
 * ~~~~~~~~~~~~~~~~~~~
 * The recursive procedure |quick_sort| sorts ...
 ***************************************************************************/
#define SHORT_LIST                  10
#define END_OFFSET                  4

/***************************************************************************
 * WEB section number:  308
 * ~~~~~~~~~~~~~~~~~~~
 * This macro pushes the last thing, necessarily a string, that was
 * popped.  And this module, along with others that push the literal
 * stack without explicitly calling |push_lit_stack|, have an index entry
 * under ``push the literal stack''; these implicit pushes collectively
 * speed up the program by about ten percent.
 ***************************************************************************/
#define REPUSH_STRING               {\
            if (lit_stack[lit_stk_ptr] >= cmd_str_ptr)\
                { UNFLUSH_STRING; }\
            INCR (lit_stk_ptr);}

/***************************************************************************
 * WEB section number:  319
 * ~~~~~~~~~~~~~~~~~~~
 * These macros append a character to |ex_buf|.  Which is called depends
 * on whether the character is known to fit.
 ***************************************************************************/
#define APPEND_EX_BUF_CHAR(X)       {\
            ex_buf[ex_buf_ptr] = (X);\
            INCR(ex_buf_ptr);}
#define APPEND_EX_BUF_CHAR_AND_CHECK(X)    {\
            if (ex_buf_ptr == Buf_Size) {buffer_overflow ();}; \
            APPEND_EX_BUF_CHAR(X)}

/***************************************************************************
 * WEB section number:   333
 * ~~~~~~~~~~~~~~~~~~~
 * These constants all begin with |n_| and are used for the |case|
 * statement that determines which |built_in| function to execute.
 ***************************************************************************/
#define N_EQUALS                    0
#define N_GREATER_THAN              1
#define N_LESS_THAN                 2
#define N_PLUS                      3
#define N_MINUS                     4
#define N_CONCATENATE               5
#define N_GETS                      6
#define N_ADD_PERIOD                7
#define N_CALL_TYPE                 8
#define N_CHANGE_CASE               9
#define N_CHR_TO_INT                10
#define N_CITE                      11
#define N_DUPLICATE                 12
#define N_EMPTY                     13
#define N_FORMAT_NAME               14
#define N_IF                        15
#define N_INT_TO_CHR                16
#define N_INT_TO_STR                17
#define N_MISSING                   18
#define N_NEWLINE                   19
#define N_NUM_NAMES                 20
#define N_POP                       21
#define N_PREAMBLE                  22
#define N_PURIFY                    23
#define N_QUOTE                     24
#define N_SKIP                      25
#define N_STACK                     26
#define N_SUBSTRING                 27
#define N_SWAP                      28
#define N_TEXT_LENGTH               29
#define N_TEXT_PREFIX               30
#define N_TOP_STACK                 31
#define N_TYPE                      32
#define N_WARNING                   33
#define N_WHILE                     34
#define N_WIDTH                     35
#define N_WRITE                     36
#define NUM_BLT_IN_FNS              37

/***************************************************************************
 * WEB section number:  338
 * ~~~~~~~~~~~~~~~~~~~
 * These constants all begin with |n_| and are used for the |case|
 * statement that determines which, if any, control sequence we're
 * dealing with; a control sequence of interest will be either one of the
 * undotted characters `\.{\\i}' or `\.{\\j}' or one of the foreign
 * characters in Table~3.2 of the \LaTeX\ manual.
 ***************************************************************************/
#define N_I                         0
#define N_J                         1
#define N_OE                        2
#define N_OE_UPPER                  3
#define N_AE                        4
#define N_AE_UPPER                  5
#define N_AA                        6
#define N_AA_UPPER                  7
#define N_O                         8
#define N_O_UPPER                   9
#define N_L                         10
#define N_L_UPPER                   11
#define N_SS                        12

/***************************************************************************
 * WEB section number:  344
 * ~~~~~~~~~~~~~~~~~~~
 * These are nonrecursive variables that |execute_fn| uses.  Declaring
 * them here (instead of in the previous module) saves execution time and
 * stack space on most machines.
 ***************************************************************************/
#define NAME_BUF                    sv_buffer

/***************************************************************************
 * WEB section number:  356
 * ~~~~~~~~~~~~~~~~~~~
 * It's time for a complaint if either of the two (entry or global) string
 * lengths is exceeded.
 ***************************************************************************/
#define BST_STRING_SIZE_EXCEEDED(X, Y)  {\
            bst_1print_string_size_exceeded ();\
            PRINT3 ("%ld%s", (long) (X), Y);\
            bst_2print_string_size_exceeded ();}

/***************************************************************************
 * WEB section number:  365
 * ~~~~~~~~~~~~~~~~~~~
 * First we define a few variables for case conversion.  The constant
 * definitions, to be used in |case| statements, are in order of probable
 * frequency.
 ***************************************************************************/
#define TITLE_LOWERS                0
#define ALL_LOWERS                  1
#define ALL_UPPERS                  2
#define BAD_CONVERSION              3

/***************************************************************************
 * WEB section number:  397
 * ~~~~~~~~~~~~~~~~~~~
 * It's a von token if there exists a first brace-level-0 letter (or
 * brace-level-1 special character), and it's in lower case; in this case
 * we return |true|.  The token is in |name_buf|, starting at
 * |name_bf_ptr| and ending just before |name_bf_xptr|.
 ***************************************************************************/
#define RETURN_VON_FOUND            {\
            von_token_found = TRUE;\
            goto Exit_Label;}

/***************************************************************************
 * WEB section number:  417
 * ~~~~~~~~~~~~~~~~~~~
 * Here we output either the \.{.bst} given string if it exists, or else
 * the \.{.bib} |sep_char| if it exists, or else the default string.  A
 * |tie| is the default space character between the last two tokens of
 * the name part, and between the first two tokens if the first token is
 * short enough; otherwise, a |space| is the default.
 ***************************************************************************/
#define LONG_TOKEN                  3

/***************************************************************************
 * WEB section number:  419
 * ~~~~~~~~~~~~~~~~~~~
 * If the last character output for this name part is a |tie| but the
 * previous character it isn't, we're dealing with a discretionary |tie|;
 * thus we replace it by a |space| if there are enough characters in the
 * rest of the name part.
 ***************************************************************************/
#define LONG_NAME                   3

/***************************************************************************
 * WEB section number:  465
 * ~~~~~~~~~~~~~~~~~~~
 * These statistics can help determine how large some of the constants
 * should be and can tell how useful certain |built_in| functions are.
 * They are written to the same files as tracing information.
 ***************************************************************************/
#define STAT_PR                     TRACE_PR
#define STAT_PR2                    TRACE_PR2
#define STAT_PR3                    TRACE_PR3

#define STAT_PR_LN                  TRACE_PR_LN
#define STAT_PR_LN2                 TRACE_PR_LN2
#define STAT_PR_LN3                 TRACE_PR_LN3

#define STAT_PR_POOL_STR            TRACE_PR_POOL_STR


/***************************************************************************
 * WEB section number:  N/A
 * ~~~~~~~~~~~~~~~~~~~
 * C isn't very good at declaring two dimensional arrays whose sizes are
 * determined at run time.  Here we create a useful macro to simulate
 * accessing a 2D array by converting the row/col into an offset from the
 * beginning of a 1D array.
 ***************************************************************************/
#define ENTRY_STRS(_r,_c)       entry_strs[(_r * (Ent_Str_Size+1)) + _c]
#define GLOBAL_STRS(_r,_c)      global_strs[(_r * (Glob_Str_Size+1)) + _c]


/***************************************************************************
 * WEB section number:  N/A
 * ~~~~~~~~~~~~~~~~~~~
 * Macros adapted from Kpathsea (lib.h) and Web2C (cpascal.h) to dynamically
 * resize arrays.
 ***************************************************************************/
/* Reallocate N items of type T for ARRAY using myrealloc.  */
#define MYRETALLOC(array, addr, n, t) ((addr) = (t *) myrealloc(addr, (n) * sizeof(t), array))
/* BibTeX needs this to dynamically reallocate arrays.  Too bad we can't
   rely on stringification, or we could avoid the ARRAY_NAME arg.
   Actually allocate one more than requests, so we can index the last
   entry, as Pascal wants to do.  */
#define BIB_XRETALLOC_NOSET(array_name, array_var, type, size_var, new_size) \
  if (log_file != NULL)\
    fprintf (log_file, "Reallocated %s (elt_size=%d) to %ld items from %ld.\n", \
             array_name, (int) sizeof (type), new_size, size_var); \
  MYRETALLOC (array_name, array_var, new_size + 1, type)
/* Same as above, but also increase SIZE_VAR for the last (or only) array.  */
#define BIB_XRETALLOC(array_name, array_var, type, size_var, new_size) do { \
  BIB_XRETALLOC_NOSET(array_name, array_var, type, size_var, new_size); \
  size_var = new_size; \
} while (0)
/* Same as above, but for the pseudo-TYPE ASCIICode_T[LENGTH+1].  */
#define BIB_XRETALLOC_STRING(array_name, array_var, length, size_var, new_size) \
  if (log_file != NULL)\
    fprintf (log_file, "Reallocated %s (elt_size=%d) to %ld items from %ld.\n", \
             array_name, (int) (length + 1), new_size, size_var); \
  MYRETALLOC (array_name, array_var, (new_size) * (length + 1), ASCIICode_T)

#endif                          /* __BIBTEX_H__ */