summaryrefslogtreecommitdiff
path: root/Build/source/texk/web2c/cwebdir/common.c
blob: 3480c862a9381d6e43a1a34fcda237f65de374d0 (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
/*1:*/
#line 62 "common.w"

/*3:*/
#line 44 "common.h"

#include <ctype.h>  
#include <stdbool.h>  
#include <stddef.h>  
#include <stdint.h>  
#include <stdlib.h>  
#include <stdio.h>  
#include <string.h>  

/*:3*/
#line 63 "common.w"

#define ctangle false
#define cweave true \

#define and_and 04
#define lt_lt 020
#define gt_gt 021
#define plus_plus 013
#define minus_minus 01
#define minus_gt 031
#define non_eq 032
#define lt_eq 034
#define gt_eq 035
#define eq_eq 036
#define or_or 037
#define dot_dot_dot 016
#define colon_colon 06
#define period_ast 026
#define minus_gt_ast 027 \

#define compress(c) if(loc++<=limit) return c \

#define xisalpha(c) (isalpha((eight_bits) (c) ) &&((eight_bits) (c) <0200) ) 
#define xisdigit(c) (isdigit((eight_bits) (c) ) &&((eight_bits) (c) <0200) ) 
#define xisspace(c) (isspace((eight_bits) (c) ) &&((eight_bits) (c) <0200) ) 
#define xislower(c) (islower((eight_bits) (c) ) &&((eight_bits) (c) <0200) ) 
#define xisupper(c) (isupper((eight_bits) (c) ) &&((eight_bits) (c) <0200) ) 
#define xisxdigit(c) (isxdigit((eight_bits) (c) ) &&((eight_bits) (c) <0200) ) 
#define isxalpha(c) ((c) =='_'||(c) =='$')  \

#define ishigh(c) ((eight_bits) (c) > 0177)  \
 \

#define max_include_depth 10 \

#define max_file_name_length 1024
#define cur_file file[include_depth]
#define cur_file_name file_name[include_depth]
#define cur_line line[include_depth]
#define web_file file[0]
#define web_file_name file_name[0] \

#define length(c) (size_t) ((c+1) ->byte_start-(c) ->byte_start) 
#define print_id(c) term_write((c) ->byte_start,length((c) ) ) 
#define llink link
#define rlink dummy.Rlink
#define root name_dir->rlink \
 \

#define spotless 0
#define harmless_message 1
#define error_message 2
#define fatal_message 3
#define mark_harmless if(history==spotless) history= harmless_message
#define mark_error history= error_message
#define confusion(s) fatal("! This can't happen: ",s)  \
 \

#define show_banner flags['b']
#define show_progress flags['p']
#define show_happiness flags['h']
#define show_stats flags['s']
#define make_xrefs flags['x'] \

#define update_terminal fflush(stdout) 
#define new_line putchar('\n') 
#define term_write(a,b) fflush(stdout) ,fwrite(a,sizeof(char) ,b,stdout)  \

#define max_bytes 1000000 \

#define max_toks 1000000
#define max_names 10239 \

#define max_sections 4000
#define max_texts 10239
#define longest_name 10000
#define stack_size 500
#define buf_size 1000
#define long_buf_size (buf_size+longest_name)  \

#define lines_dont_match (change_limit-change_buffer!=limit-buffer|| \
strncmp(buffer,change_buffer,(size_t) (limit-buffer) ) )  \

#define if_section_start_make_pending(b) { \
*limit= '!'; \
for(loc= buffer;xisspace(*loc) ;loc++) ; \
*limit= ' '; \
if(*loc=='@'&&(xisspace(*(loc+1) ) ||*(loc+1) =='*') ) change_pending= b; \
} \

#define too_long() {include_depth--; \
err_print("! Include file name too long") ;goto restart;} \

#define hash_size 8501 \

#define first_chunk(p) ((p) ->byte_start+2) 
#define prefix_length(p) (int) ((eight_bits) *((p) ->byte_start) *256+ \
(eight_bits) *((p) ->byte_start+1) ) 
#define set_prefix_length(p,m) (*((p) ->byte_start) = (m) /256, \
*((p) ->byte_start+1) = (m) %256)  \

#define less 0
#define equal 1
#define greater 2
#define prefix 3
#define extension 4 \

#define bad_extension 5 \

#define flag_change (**argv!='-') 

#line 64 "common.w"

/*2:*/
#line 35 "common.h"

typedef bool boolean;
typedef uint8_t eight_bits;
typedef uint16_t sixteen_bits;
extern boolean program;
extern int phase;

/*:2*//*4:*/
#line 74 "common.h"

extern char section_text[];
extern char*section_text_end;
extern char*id_first;
extern char*id_loc;

/*:4*//*5:*/
#line 92 "common.h"

extern char buffer[];
extern char*buffer_end;
extern char*loc;
extern char*limit;

/*:5*//*6:*/
#line 109 "common.h"

extern int include_depth;
extern FILE*file[];
extern FILE*change_file;
extern char file_name[][max_file_name_length];

extern char change_file_name[];
extern int line[];
extern int change_line;
extern int change_depth;
extern boolean input_has_ended;
extern boolean changing;
extern boolean web_file_open;

/*:6*//*8:*/
#line 129 "common.h"

extern sixteen_bits section_count;
extern boolean changed_section[];
extern boolean change_pending;
extern boolean print_where;

/*:8*//*9:*/
#line 143 "common.h"

typedef struct name_info{
char*byte_start;
struct name_info*link;
union{
struct name_info*Rlink;

char Ilk;
}dummy;
void*equiv_or_xref;
}name_info;
typedef name_info*name_pointer;
typedef name_pointer*hash_pointer;
extern char byte_mem[];
extern char*byte_mem_end;
extern char*byte_ptr;
extern name_info name_dir[];
extern name_pointer name_dir_end;
extern name_pointer name_ptr;
extern name_pointer hash[];
extern hash_pointer hash_end;
extern hash_pointer h;

/*:9*//*11:*/
#line 187 "common.h"

extern int history;

/*:11*//*13:*/
#line 203 "common.h"

extern int argc;
extern char**argv;
extern char C_file_name[];
extern char tex_file_name[];
extern char idx_file_name[];
extern char scn_file_name[];
extern boolean flags[];

/*:13*//*14:*/
#line 217 "common.h"

extern FILE*C_file;
extern FILE*tex_file;
extern FILE*idx_file;
extern FILE*scn_file;
extern FILE*active_file;

/*:14*/
#line 65 "common.w"

/*18:*/
#line 79 "common.w"

boolean program;

/*:18*//*19:*/
#line 88 "common.w"

int phase;

/*:19*//*21:*/
#line 126 "common.w"

char section_text[longest_name+1];
char*section_text_end= section_text+longest_name;
char*id_first;
char*id_loc;

/*:21*//*22:*/
#line 146 "common.w"

char buffer[long_buf_size];
char*buffer_end= buffer+buf_size-2;
char*loc= buffer;
char*limit= buffer;

/*:22*//*25:*/
#line 190 "common.w"

int include_depth;
FILE*file[max_include_depth];
FILE*change_file;
char file_name[max_include_depth][max_file_name_length];

char change_file_name[max_file_name_length];
static char alt_web_file_name[max_file_name_length];
int line[max_include_depth];
int change_line;
int change_depth;
boolean input_has_ended;
boolean changing;
boolean web_file_open= false;

/*:25*//*26:*/
#line 216 "common.w"

static char change_buffer[buf_size];
static char*change_limit;

/*:26*//*37:*/
#line 396 "common.w"

sixteen_bits section_count;
boolean changed_section[max_sections];
boolean change_pending;

boolean print_where= false;

/*:37*//*43:*/
#line 593 "common.w"

char byte_mem[max_bytes];
char*byte_mem_end= byte_mem+max_bytes-1;
name_info name_dir[max_names];
name_pointer name_dir_end= name_dir+max_names-1;

/*:43*//*44:*/
#line 604 "common.w"

char*byte_ptr;
name_pointer name_ptr;

/*:44*//*46:*/
#line 624 "common.w"

name_pointer hash[hash_size];
hash_pointer hash_end= hash+hash_size-1;
hash_pointer h;

/*:46*//*65:*/
#line 1006 "common.w"

int history= spotless;

/*:65*//*73:*/
#line 1129 "common.w"

int argc;
char**argv;
char C_file_name[max_file_name_length];
char tex_file_name[max_file_name_length];
char idx_file_name[max_file_name_length];
char scn_file_name[max_file_name_length];
boolean flags[128];

/*:73*//*83:*/
#line 1272 "common.w"

FILE*C_file;
FILE*tex_file;
FILE*idx_file;
FILE*scn_file;
FILE*active_file;

/*:83*/
#line 66 "common.w"

/*7:*/
#line 123 "common.h"

extern boolean get_line(void);
extern void check_complete(void);
extern void reset_input(void);

/*:7*//*10:*/
#line 166 "common.h"

extern boolean names_match(name_pointer,const char*,size_t,eight_bits);
extern name_pointer id_lookup(const char*,const char*,char);

extern name_pointer section_lookup(char*,char*,boolean);
extern void init_node(name_pointer);
extern void init_p(name_pointer,eight_bits);
extern void print_prefix_name(name_pointer);
extern void print_section_name(name_pointer);
extern void sprint_section_name(char*,name_pointer);

/*:10*//*12:*/
#line 190 "common.h"

extern int wrap_up(void);
extern void err_print(const char*);
extern void fatal(const char*,const char*);
extern void overflow(const char*);

/*:12*//*15:*/
#line 225 "common.h"

extern void common_init(void);
extern void print_stats(void);

/*:15*//*24:*/
#line 176 "common.w"
static boolean input_ln(FILE*);

/*:24*//*28:*/
#line 237 "common.w"
static void prime_the_change_buffer(void);

/*:28*//*33:*/
#line 337 "common.w"
static void check_change(void);

/*:33*//*55:*/
#line 767 "common.w"

static int web_strcmp(char*,int,char*,int);
static name_pointer add_section_name(name_pointer,int,char*,char*,boolean);
static void extend_section_name(name_pointer,char*,char*,boolean);

/*:55*//*64:*/
#line 994 "common.w"
static int section_name_cmp(char**,int,name_pointer);

/*:64*//*76:*/
#line 1189 "common.w"
static void scan_args(void);

/*:76*/
#line 67 "common.w"


/*:1*//*20:*/
#line 95 "common.w"

void
common_init(void)
{
/*45:*/
#line 608 "common.w"

name_dir->byte_start= byte_ptr= byte_mem;
name_ptr= name_dir+1;
name_ptr->byte_start= byte_mem;
root= NULL;

/*:45*//*47:*/
#line 631 "common.w"

for(h= hash;h<=hash_end;*h++= NULL);

/*:47*/
#line 99 "common.w"

/*74:*/
#line 1142 "common.w"

show_banner= show_happiness= show_progress= make_xrefs= true;

/*:74*/
#line 100 "common.w"

/*84:*/
#line 1279 "common.w"

scan_args();
if(program==ctangle){
if((C_file= fopen(C_file_name,"wb"))==NULL)
fatal("! Cannot open output file ",C_file_name);

}
else{
if((tex_file= fopen(tex_file_name,"wb"))==NULL)
fatal("! Cannot open output file ",tex_file_name);
}

/*:84*/
#line 101 "common.w"

}

/*:20*//*23:*/
#line 156 "common.w"

static boolean input_ln(
FILE*fp)
{
register int c= EOF;
register char*k;
if(feof(fp))return false;
limit= k= buffer;
while(k<=buffer_end&&(c= getc(fp))!=EOF&&c!='\n')
if((*(k++)= c)!=' ')limit= k;
if(k> buffer_end)
if((c= getc(fp))!=EOF&&c!='\n'){
ungetc(c,fp);loc= buffer;err_print("! Input line too long");

}
if(c==EOF&&limit==buffer)return false;

return true;
}

/*:23*//*27:*/
#line 227 "common.w"

static void
prime_the_change_buffer(void)
{
change_limit= change_buffer;
/*29:*/
#line 243 "common.w"

while(true){
change_line++;
if(!input_ln(change_file))return;
if(limit<buffer+2)continue;
if(buffer[0]!='@')continue;
if(xisupper(buffer[1]))buffer[1]= tolower((eight_bits)buffer[1]);
if(buffer[1]=='x')break;
if(buffer[1]=='y'||buffer[1]=='z'||buffer[1]=='i'){
loc= buffer+2;
err_print("! Missing @x in change file");

}
}

/*:29*/
#line 232 "common.w"

/*30:*/
#line 260 "common.w"

do{
change_line++;
if(!input_ln(change_file)){
err_print("! Change file ended after @x");

return;
}
}while(limit==buffer);

/*:30*/
#line 233 "common.w"

/*31:*/
#line 270 "common.w"

{
change_limit= change_buffer+(ptrdiff_t)(limit-buffer);
strncpy(change_buffer,buffer,(size_t)(limit-buffer+1));
}

/*:31*/
#line 234 "common.w"

}

/*:27*//*32:*/
#line 299 "common.w"

static void
check_change(void)
{
int n= 0;
if(lines_dont_match)return;
change_pending= false;
if(!changed_section[section_count]){
if_section_start_make_pending(true);
if(!change_pending)changed_section[section_count]= true;
}
while(true){
changing= print_where= true;change_line++;
if(!input_ln(change_file)){
err_print("! Change file ended before @y");

change_limit= change_buffer;changing= false;
return;
}
if(limit> buffer+1&&buffer[0]=='@'){
char xyz_code= xisupper(buffer[1])?tolower((eight_bits)buffer[1]):buffer[1];
/*34:*/
#line 339 "common.w"

if(xyz_code=='x'||xyz_code=='z'){
loc= buffer+2;err_print("! Where is the matching @y?");

}
else if(xyz_code=='y'){
if(n> 0){
loc= buffer+2;
printf("\n! Hmm... %d ",n);
err_print("of the preceding lines failed to match");

}
change_depth= include_depth;
return;
}

/*:34*/
#line 321 "common.w"

}
/*31:*/
#line 270 "common.w"

{
change_limit= change_buffer+(ptrdiff_t)(limit-buffer);
strncpy(change_buffer,buffer,(size_t)(limit-buffer+1));
}

/*:31*/
#line 323 "common.w"

changing= false;cur_line++;
while(!input_ln(cur_file)){
if(include_depth==0){
err_print("! CWEB file ended during a change");

input_has_ended= true;return;
}
include_depth--;cur_line++;
}
if(lines_dont_match)n++;
}
}

/*:32*//*35:*/
#line 359 "common.w"

void
reset_input(void)
{
limit= buffer;loc= buffer+1;buffer[0]= ' ';
/*36:*/
#line 374 "common.w"

if((web_file= fopen(web_file_name,"r"))==NULL){
strcpy(web_file_name,alt_web_file_name);
if((web_file= fopen(web_file_name,"r"))==NULL)
fatal("! Cannot open input file ",web_file_name);
}


web_file_open= true;
if((change_file= fopen(change_file_name,"r"))==NULL)
fatal("! Cannot open change file ",change_file_name);

/*:36*/
#line 364 "common.w"

include_depth= cur_line= change_line= 0;
change_depth= include_depth;
changing= true;prime_the_change_buffer();changing= !changing;
limit= buffer;loc= buffer+1;buffer[0]= ' ';input_has_ended= false;
}

/*:35*//*38:*/
#line 403 "common.w"

boolean get_line(void)
{
restart:
if(changing&&include_depth==change_depth)
/*41:*/
#line 511 "common.w"
{
change_line++;
if(!input_ln(change_file)){
err_print("! Change file ended without @z");

buffer[0]= '@';buffer[1]= 'z';limit= buffer+2;
}
if(limit> buffer){
if(change_pending){
if_section_start_make_pending(false);
if(change_pending){
changed_section[section_count]= true;change_pending= false;
}
}
*limit= ' ';
if(buffer[0]=='@'){
if(xisupper(buffer[1]))buffer[1]= tolower((eight_bits)buffer[1]);
if(buffer[1]=='x'||buffer[1]=='y'){
loc= buffer+2;
err_print("! Where is the matching @z?");

}
else if(buffer[1]=='z'){
prime_the_change_buffer();changing= !changing;print_where= true;
}
}
}
}

/*:41*/
#line 408 "common.w"

if(!changing||include_depth> change_depth){
/*40:*/
#line 494 "common.w"
{
cur_line++;
while(!input_ln(cur_file)){
print_where= true;
if(include_depth==0){input_has_ended= true;break;}
else{
fclose(cur_file);include_depth--;
if(changing&&include_depth==change_depth)break;
cur_line++;
}
}
if(!changing&&!input_has_ended)
if(limit-buffer==change_limit-change_buffer)
if(buffer[0]==change_buffer[0])
if(change_limit> change_buffer)check_change();
}

/*:40*/
#line 410 "common.w"

if(changing&&include_depth==change_depth)goto restart;
}
if(input_has_ended)return false;
loc= buffer;*limit= ' ';
if(buffer[0]=='@'&&(buffer[1]=='i'||buffer[1]=='I')){
loc= buffer+2;*limit= '"';
while(*loc==' '||*loc=='\t')loc++;
if(loc>=limit){
err_print("! Include file name not given");

goto restart;
}
if(include_depth>=max_include_depth-1){
err_print("! Too many nested includes");

goto restart;
}
include_depth++;
/*39:*/
#line 448 "common.w"
{
char temp_file_name[max_file_name_length];
char*cur_file_name_end= cur_file_name+max_file_name_length-1;
char*kk,*k= cur_file_name;
int l;

if(*loc=='"'){
loc++;
while(*loc!='"'&&k<=cur_file_name_end)*k++= *loc++;
if(loc==limit)k= cur_file_name_end+1;
}else
while(*loc!=' '&&*loc!='\t'&&*loc!='"'&&k<=cur_file_name_end)*k++= *loc++;
if(k> cur_file_name_end)too_long();

*k= '\0';
if((cur_file= fopen(cur_file_name,"r"))!=NULL){
cur_line= 0;print_where= true;
goto restart;
}
if((kk= getenv("CWEBINPUTS"))!=NULL){

if((l= strlen(kk))> max_file_name_length-2)too_long();
strcpy(temp_file_name,kk);
}
else{
#ifdef CWEBINPUTS
if((l= strlen(CWEBINPUTS))> max_file_name_length-2)too_long();
strcpy(temp_file_name,CWEBINPUTS);
#else
l= 0;
#endif 
}
if(l> 0){
if(k+l+2>=cur_file_name_end)too_long();

for(;k>=cur_file_name;k--)*(k+l+1)= *k;
strcpy(cur_file_name,temp_file_name);
cur_file_name[l]= '/';
if((cur_file= fopen(cur_file_name,"r"))!=NULL){
cur_line= 0;print_where= true;
goto restart;
}
}
include_depth--;err_print("! Cannot open include file");goto restart;
}

/*:39*/
#line 429 "common.w"

}
return true;
}

/*:38*//*42:*/
#line 543 "common.w"

void
check_complete(void){
if(change_limit!=change_buffer){
strncpy(buffer,change_buffer,(size_t)(change_limit-change_buffer+1));
limit= buffer+(ptrdiff_t)(change_limit-change_buffer);
changing= true;change_depth= include_depth;loc= buffer;
err_print("! Change file entry did not match");

}
}

/*:42*//*48:*/
#line 636 "common.w"

name_pointer
id_lookup(
const char*first,
const char*last,
char t)
{
const char*i= first;
int h;
int l;
name_pointer p;
if(last==NULL)for(last= first;*last!='\0';last++);
l= (int)(last-first);
/*49:*/
#line 659 "common.w"

h= (eight_bits)*i;
while(++i<last)h= (h+h+(int)((eight_bits)*i))%hash_size;


/*:49*/
#line 649 "common.w"

/*50:*/
#line 667 "common.w"

p= hash[h];
while(p&&!names_match(p,first,l,t))p= p->link;
if(p==NULL){
p= name_ptr;
p->link= hash[h];hash[h]= p;
}

/*:50*/
#line 650 "common.w"

if(p==name_ptr)/*51:*/
#line 679 "common.w"
{
if(byte_ptr+l> byte_mem_end)overflow("byte memory");
if(name_ptr>=name_dir_end)overflow("name");
strncpy(byte_ptr,first,l);
(++name_ptr)->byte_start= byte_ptr+= l;
init_p(p,t);
}

/*:51*/
#line 651 "common.w"

return p;
}

/*:48*//*52:*/
#line 711 "common.w"

void
print_section_name(
name_pointer p)
{
char*ss,*s= first_chunk(p);
name_pointer q= p+1;
while(p!=name_dir){
ss= (p+1)->byte_start-1;
if(*ss==' '&&ss>=s)p= q->link,q= p;
else ss++,p= name_dir,q= NULL;
term_write(s,(size_t)(ss-s));
s= p->byte_start;
}
if(q)term_write("...",3);
}

/*:52*//*53:*/
#line 728 "common.w"

void
sprint_section_name(
char*dest,
name_pointer p)
{
char*ss,*s= first_chunk(p);
name_pointer q= p+1;
while(p!=name_dir){
ss= (p+1)->byte_start-1;
if(*ss==' '&&ss>=s)p= q->link,q= p;
else ss++,p= name_dir;
strncpy(dest,s,(size_t)(ss-s)),dest+= ss-s;
s= p->byte_start;
}
*dest= '\0';
}

/*:53*//*54:*/
#line 746 "common.w"

void
print_prefix_name(
name_pointer p)
{
char*s= first_chunk(p);
int l= prefix_length(p);
term_write(s,l);
if(s+l<(p+1)->byte_start)term_write("...",3);
}

/*:54*//*56:*/
#line 772 "common.w"

static int web_strcmp(
char*j,
int j_len,
char*k,
int k_len)
{
char*j1= j+j_len,*k1= k+k_len;
while(k<k1&&j<j1&&*j==*k)k++,j++;
if(k==k1)if(j==j1)return equal;
else return extension;
else if(j==j1)return prefix;
else if(*j<*k)return less;
else return greater;
}

/*:56*//*57:*/
#line 801 "common.w"

static name_pointer
add_section_name(
name_pointer par,
int c,
char*first,
char*last,
boolean ispref)
{
name_pointer p= name_ptr;
char*s= first_chunk(p);
int name_len= (int)(last-first)+ispref;
if(s+name_len> byte_mem_end)overflow("byte memory");
if(name_ptr+1>=name_dir_end)overflow("name");
(++name_ptr)->byte_start= byte_ptr= s+name_len;
if(ispref){
*(byte_ptr-1)= ' ';
name_len--;
name_ptr->link= name_dir;
(++name_ptr)->byte_start= byte_ptr;
}
set_prefix_length(p,name_len);
strncpy(s,first,name_len);
p->llink= p->rlink= NULL;
init_node(p);
return par==NULL?(root= p):c==less?(par->llink= p):(par->rlink= p);
}

/*:57*//*58:*/
#line 829 "common.w"

static void
extend_section_name(
name_pointer p,
char*first,
char*last,
boolean ispref)
{
char*s;
name_pointer q= p+1;
int name_len= (int)(last-first)+ispref;
if(name_ptr>=name_dir_end)overflow("name");
while(q->link!=name_dir)q= q->link;
q->link= name_ptr;
s= name_ptr->byte_start;
name_ptr->link= name_dir;
if(s+name_len> byte_mem_end)overflow("byte memory");
(++name_ptr)->byte_start= byte_ptr= s+name_len;
strncpy(s,first,name_len);
if(ispref)*(byte_ptr-1)= ' ';
}

/*:58*//*59:*/
#line 857 "common.w"

name_pointer
section_lookup(
char*first,char*last,
boolean ispref)
{
int c= less;
name_pointer p= root;
name_pointer q= NULL;
name_pointer r= NULL;
name_pointer par= NULL;

int name_len= (int)(last-first)+1;
/*60:*/
#line 881 "common.w"

while(p){
c= web_strcmp(first,name_len,first_chunk(p),prefix_length(p));
if(c==less||c==greater){
if(r==NULL)
par= p;
p= (c==less?p->llink:p->rlink);
}else{
if(r!=NULL){
fputs("\n! Ambiguous prefix: matches <",stdout);

print_prefix_name(p);
fputs(">\n and <",stdout);
print_prefix_name(r);
err_print(">");
return name_dir;
}
r= p;
p= p->llink;
q= r->rlink;
}
if(p==NULL)
p= q,q= NULL;
}

/*:60*/
#line 871 "common.w"

/*61:*/
#line 906 "common.w"

if(r==NULL)
return add_section_name(par,c,first,last+1,ispref);

/*:61*/
#line 872 "common.w"

/*62:*/
#line 914 "common.w"

switch(section_name_cmp(&first,name_len,r)){

case prefix:
if(!ispref){
fputs("\n! New name is a prefix of <",stdout);

print_section_name(r);
err_print(">");
}
else if(name_len<prefix_length(r))set_prefix_length(r,name_len);

case equal:break;
case extension:if(!ispref||first<=last)
extend_section_name(r,first,last+1,ispref);
break;
case bad_extension:
fputs("\n! New name extends <",stdout);

print_section_name(r);
err_print(">");
break;
default:
fputs("\n! Section name incompatible with <",stdout);

print_prefix_name(r);
fputs(">,\n which abbreviates <",stdout);
print_section_name(r);
err_print(">");
}
return r;

/*:62*/
#line 873 "common.w"

}

/*:59*//*63:*/
#line 962 "common.w"

static int section_name_cmp(
char**pfirst,
int len,
name_pointer r)
{
char*first= *pfirst;
name_pointer q= r+1;
char*ss,*s= first_chunk(r);
int c= less;
boolean ispref;
while(true){
ss= (r+1)->byte_start-1;
if(*ss==' '&&ss>=r->byte_start)ispref= true,q= q->link;
else ispref= false,ss++,q= name_dir;
switch(c= web_strcmp(first,len,s,ss-s)){
case equal:if(q==name_dir)
if(ispref){
*pfirst= first+(ptrdiff_t)(ss-s);
return extension;
}else return equal;
else return(q->byte_start==(q+1)->byte_start)?equal:prefix;
case extension:
if(!ispref)return bad_extension;
first+= ss-s;
if(q!=name_dir){len-= (int)(ss-s);s= q->byte_start;r= q;continue;}
*pfirst= first;return extension;
default:return c;
}
}
}

/*:63*//*66:*/
#line 1016 "common.w"

void
err_print(
const char*s)
{
char*k,*l;
printf(*s=='!'?"\n%s":"%s",s);
if(web_file_open)/*67:*/
#line 1036 "common.w"

{if(changing&&include_depth==change_depth)
printf(". (l. %d of change file)\n",change_line);
else if(include_depth==0)printf(". (l. %d)\n",cur_line);
else printf(". (l. %d of include file %s)\n",cur_line,cur_file_name);
l= (loc>=limit?limit:loc);
if(l> buffer){
for(k= buffer;k<l;k++)
if(*k=='\t')putchar(' ');
else putchar(*k);
new_line;
for(k= buffer;k<l;k++)putchar(' ');
}
for(k= l;k<limit;k++)putchar(*k);
if(*limit=='|')putchar('|');
putchar(' ');
}

/*:67*/
#line 1023 "common.w"

update_terminal;mark_error;
}

/*:66*//*68:*/
#line 1068 "common.w"

int wrap_up(void){
if(show_progress)new_line;
if(show_stats)
print_stats();
/*69:*/
#line 1078 "common.w"

switch(history){
case spotless:
if(show_happiness)puts("(No errors were found.)");break;
case harmless_message:
puts("(Did you see the warning message above?)");break;
case error_message:
puts("(Pardon me, but I think I spotted something wrong.)");break;
case fatal_message:default:
puts("(That was a fatal error, my friend.)");
}

/*:69*/
#line 1073 "common.w"

if(history> harmless_message)return EXIT_FAILURE;
else return EXIT_SUCCESS;
}

/*:68*//*70:*/
#line 1096 "common.w"
void
fatal(
const char*s,const char*t)
{
if(*s)err_print(s);
err_print(t);
history= fatal_message;exit(wrap_up());
}

/*:70*//*71:*/
#line 1107 "common.w"
void
overflow(
const char*t)
{
printf("\n! Sorry, %s capacity exceeded",t);fatal("","");
}


/*:71*//*75:*/
#line 1160 "common.w"

static void
scan_args(void)
{
char*dot_pos;
char*name_pos;
register char*s;
boolean found_web= false,found_change= false,found_out= false;


strcpy(change_file_name,"/dev/null");
while(--argc> 0){
if((**(++argv)=='-'||**argv=='+')&&*(*argv+1))/*80:*/
#line 1250 "common.w"

for(dot_pos= *argv+1;*dot_pos> '\0';dot_pos++)
flags[(eight_bits)*dot_pos]= flag_change;

/*:80*/
#line 1172 "common.w"

else{
s= name_pos= *argv;dot_pos= NULL;
while(*s)
if(*s=='.')dot_pos= s++;
else if(*s=='/')dot_pos= NULL,name_pos= ++s;
else s++;
if(!found_web)/*77:*/
#line 1198 "common.w"

{
if(s-*argv> max_file_name_length-5)
/*82:*/
#line 1266 "common.w"
fatal("! Filename too long\n",*argv);


/*:82*/
#line 1201 "common.w"

if(dot_pos==NULL)
sprintf(web_file_name,"%s.w",*argv);
else{
strcpy(web_file_name,*argv);
*dot_pos= 0;
}
sprintf(alt_web_file_name,"%s.web",*argv);
sprintf(tex_file_name,"%s.tex",name_pos);
sprintf(idx_file_name,"%s.idx",name_pos);
sprintf(scn_file_name,"%s.scn",name_pos);
sprintf(C_file_name,"%s.c",name_pos);
found_web= true;
}

/*:77*/
#line 1180 "common.w"

else if(!found_change)/*78:*/
#line 1216 "common.w"

{
if(strcmp(*argv,"-")!=0){
if(s-*argv> max_file_name_length-4)
/*82:*/
#line 1266 "common.w"
fatal("! Filename too long\n",*argv);


/*:82*/
#line 1220 "common.w"

if(dot_pos==NULL)
sprintf(change_file_name,"%s.ch",*argv);
else strcpy(change_file_name,*argv);
}
found_change= true;
}

/*:78*/
#line 1181 "common.w"

else if(!found_out)/*79:*/
#line 1228 "common.w"

{
if(s-*argv> max_file_name_length-5)
/*82:*/
#line 1266 "common.w"
fatal("! Filename too long\n",*argv);


/*:82*/
#line 1231 "common.w"

if(dot_pos==NULL){
sprintf(tex_file_name,"%s.tex",*argv);
sprintf(idx_file_name,"%s.idx",*argv);
sprintf(scn_file_name,"%s.scn",*argv);
sprintf(C_file_name,"%s.c",*argv);
}else{
strcpy(tex_file_name,*argv);
strcpy(C_file_name,*argv);
if(make_xrefs){
*dot_pos= 0;
sprintf(idx_file_name,"%s.idx",*argv);
sprintf(scn_file_name,"%s.scn",*argv);
}
}
found_out= true;
}

/*:79*/
#line 1182 "common.w"

else/*81:*/
#line 1254 "common.w"

{
if(program==ctangle)
fatal(
"! Usage: ctangle [options] webfile[.w] [{changefile[.ch]|-} [outfile[.c]]]\n"
,"");

else fatal(
"! Usage: cweave [options] webfile[.w] [{changefile[.ch]|-} [outfile[.tex]]]\n"
,"");
}

/*:81*/
#line 1183 "common.w"

}
}
if(!found_web)/*81:*/
#line 1254 "common.w"

{
if(program==ctangle)
fatal(
"! Usage: ctangle [options] webfile[.w] [{changefile[.ch]|-} [outfile[.c]]]\n"
,"");

else fatal(
"! Usage: cweave [options] webfile[.w] [{changefile[.ch]|-} [outfile[.tex]]]\n"
,"");
}

/*:81*/
#line 1186 "common.w"

}

/*:75*/