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
|
% omocp.ch: Reading an OCP file
%
% This file is part of Omega,
% which is based on the web2c distribution of TeX,
%
% Copyright (c) 1994--2001 John Plaice and Yannis Haralambous
%
% Omega is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2 of the License, or
% (at your option) any later version.
%
% Omega 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 Omega; if not, write to the Free Software Foundation, Inc.,
% 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
%
%---------------------------------------
@x [1] m.11 l.412 - Omega OCP
{string of length |file_name_size|; tells where the string pool appears}
@.TeXformats@>
@y
{string of length |file_name_size|; tells where the string pool appears}
@.TeXformats@>
@!ocp_maxint=@"10000000;
@z
%---------------------------------------
@x [1] m.12 l.436 - Omega OCP
@d hyph_size=307 {another prime; the number of \.{\\hyphenation} exceptions}
@y
@d hyph_size=307 {another prime; the number of \.{\\hyphenation} exceptions}
@d ocp_base=0 {smallest internal ocp number; must not be less
than |min_quarterword|}
@d ocp_biggest=65535 {the real biggest ocp}
@d number_ocps=ocp_biggest-ocp_base+1
@d ocp_list_base=0 {smallest internal ocp list number; must not be less
than |min_quarterword|}
@d ocp_list_biggest=65535 {the real biggest ocp list}
@d number_ocp_lists=ocp_list_biggest-ocp_list_base+1
@d max_active_ocp_lists=65536
@z
%---------------------------------------
@x [15] m.209 l.4170 - Omega OCP
@d max_command=set_interaction
{the largest command code seen at |big_switch|}
@y
@d set_ocp=set_interaction+1
{Place a translation process in the stream}
@d def_ocp=set_ocp+1
{Define and load a translation process}
@d set_ocp_list=def_ocp+1
{Place a list of OCPs in the stream}
@d def_ocp_list=set_ocp_list+1
{Define a list of OCPs}
@d clear_ocp_lists=def_ocp_list+1
{Remove all active OCP lists}
@d push_ocp_list=clear_ocp_lists+1
{Add to the sequence of active OCP lists}
@d pop_ocp_list=push_ocp_list+1
{Remove from the sequence of active OCP lists}
@d ocp_list_op=pop_ocp_list+1
{Operations for building a list of OCPs}
@d ocp_trace_level=ocp_list_op+1
{Tracing of active OCPs, either 0 or 1}
@d max_command=ocp_trace_level
{the largest command code seen at |big_switch|}
@z
%---------------------------------------
@x [17] m.222 l.4523 - Omega OCP
@d font_id_base=frozen_null_font-font_base
{begins table of |number_fonts| permanent font identifiers}
@d undefined_control_sequence=frozen_null_font+number_fonts
@y
@d font_id_base=frozen_null_font-font_base
{begins table of |number_fonts| permanent font identifiers}
@d frozen_null_ocp=frozen_null_font+number_fonts
{permanent `\.{\\nullocp}'}
@d ocp_id_base=frozen_null_ocp-ocp_base
{begins table of |number_ocps| permanent ocp identifiers}
@d frozen_null_ocp_list=frozen_null_ocp+number_ocps
{permanent `\.{\\nullocplist}'}
@d ocp_list_id_base=frozen_null_ocp_list-ocp_list_base
{begins table of |number_ocp_lists| permanent ocp list identifiers}
@d undefined_control_sequence=frozen_null_ocp_list+number_ocp_lists
@z
%---------------------------------------
@x
@d toks_base=local_base+10 {table of |number_regs| token list registers}
@y
@d ocp_trace_level_base=local_base+10
@d ocp_active_number_base=ocp_trace_level_base+1
@d ocp_active_min_ptr_base = ocp_active_number_base+1
@d ocp_active_max_ptr_base = ocp_active_min_ptr_base+1
@d ocp_active_base = ocp_active_max_ptr_base+1
@d toks_base=ocp_active_base+max_active_ocp_lists
{table of |number_regs| token list registers}
@z
%---------------------------------------
@x [17] m.232 l.4799 - Omega OCP
@d null_font==font_base
@y
@d null_font==font_base
@d null_ocp==ocp_base
@d null_ocp_list==ocp_list_base
@z
%---------------------------------------
@x [18] m.256 l.5479 - Omega OCP
@d font_id_text(#) == newtext(font_id_base+#) {a frozen font identifier's name}
@y
@d font_id_text(#) == newtext(font_id_base+#) {a frozen font identifier's name}
@d ocp_id_text(#) == newtext(ocp_id_base+#) {a frozen ocp identifier's name}
@d ocp_list_id_text(#) == newtext(ocp_list_id_base+#)
{a frozen ocp list identifier's name}
@z
%---------------------------------------
@x [26] m.409 l.8254 - Omega OCP
@t\4\4@>@<Declare procedures that scan font-related stuff@>
@y
@t\4\4@>@<Declare procedures that scan font-related stuff@>
@t\4\4@>@<Declare procedures that scan ocp-related stuff@>
@z
%---------------------------------------
@x [29] m.514 l.9968 - Omega OCP
|TEX_font_area|. These system area names will, of course, vary from place
to place.
@y
|TEX_font_area|. $\Omega$'s compiled translation process files whose areas
are not given explicitly are assumed to appear in a standard system area
called |OMEGA_ocp_area|. These system area names will, of course, vary
from place to place.
@z
%---------------------------------------
@x [29] m.514 l.9974 - Omega OCP
@d TEX_font_area=="TeXfonts:"
@.TeXfonts@>
@y
@d TEX_font_area=="TeXfonts:"
@.TeXfonts@>
@d OMEGA_ocp_area=="OmegaOCPs:"
@.OmegaOCPs@>
@z
%---------------------------------------
@x [30] m.582 l.10379 - Omega OCP
@* \[30] Font metric data.
@y
@* \[30] Font metric data and OCPs.
@z
%---------------------------------------
@x [30] m.??? l.10928 - Omega OCP
@ @<Read and check...@>=
@y
@ @<Read and check the font data...@>=
@z
%---------------------------------------
@x [30] m.??? l.11010 - Omega OCP
@ @<Apologize for not loading...@>=
@y
@ @<Apologize for not loading the font...@>=
@z
%---------------------------------------
@x [30] m.582 l.11283 - Omega OCP
char_warning(f,c);
new_character:=null;
exit:end;
@y
char_warning(f,c);
new_character:=null;
exit:end;
@ Here we begin the \.{OCP} file handling.
@<Glob...@>=
@!ocp_file:byte_file;
@ So that is what \.{OCP} files hold.
When the user defines \.{\\ocp\\f}, say, \TeX\ assigns an internal number
to the user's ocp~\.{\\f}. Adding this number to |ocp_id_base| gives the
|eqtb| location of a ``frozen'' control sequence that will always select
the ocp.
@<Types...@>=
@!internal_ocp_number=ocp_base..ocp_biggest;
@!ocp_index=integer;
@ Here now is the array of ocp arrays.
@<Glob...@>=
@!ocp_ptr:internal_ocp_number; {largest internal ocp number in use}
@ Besides the arrays just enumerated, we have two directory arrays that
make it easy to get at the individual entries in |ocp_info|.
The beginning of the info for the |j|-th state in the |i|-th ocp is at
location |ocp_info[ocp_state_base[i]+j]| and the |k|-th entry is in
location |ocp_info[ocp_info[ocp_state_base[i]+j]+k]|.
(These formulas assume that |min_quarterword| has already been
added to |i|, |j| and |k|, since $\Omega$ stores its quarterwords that way.)
@d ocp_info_end(#)==#]
@d ocp_info(#)==ocp_tables[#,ocp_info_end
@d offset_ocp_file_size=0
@d offset_ocp_name=1
@d offset_ocp_area=offset_ocp_name+1
@d offset_ocp_external=offset_ocp_area+1
@d offset_ocp_external_arg=offset_ocp_external+1
@d offset_ocp_input=offset_ocp_external_arg+1
@d offset_ocp_output=offset_ocp_input+1
@d offset_ocp_no_tables=offset_ocp_output+1
@d offset_ocp_no_states=offset_ocp_no_tables+1
@d offset_ocp_table_base=offset_ocp_no_states+1
@d offset_ocp_state_base=offset_ocp_table_base+1
@d offset_ocp_info=offset_ocp_state_base+1
@d ocp_file_size(#)==ocp_info(#)(offset_ocp_file_size)
@d ocp_name(#)==ocp_info(#)(offset_ocp_name)
@d ocp_area(#)==ocp_info(#)(offset_ocp_area)
@d ocp_external(#)==ocp_info(#)(offset_ocp_external)
@d ocp_external_arg(#)==ocp_info(#)(offset_ocp_external_arg)
@d ocp_input(#)==ocp_info(#)(offset_ocp_input)
@d ocp_output(#)==ocp_info(#)(offset_ocp_output)
@d ocp_no_tables(#)==ocp_info(#)(offset_ocp_no_tables)
@d ocp_no_states(#)==ocp_info(#)(offset_ocp_no_states)
@d ocp_table_base(#)==ocp_info(#)(offset_ocp_table_base)
@d ocp_state_base(#)==ocp_info(#)(offset_ocp_state_base)
@ $\Omega$ always knows at least one ocp, namely the null ocp.
It does nothing.
@<Initialize table...@>=
ocp_ptr:=null_ocp;
allocate_ocp_table(null_ocp,17);
ocp_file_size(null_ocp):=17;
ocp_name(null_ocp):="nullocp"; ocp_area(null_ocp):="";
ocp_external(null_ocp):=0; ocp_external_arg(null_ocp):=0;
ocp_input(null_ocp):=1; ocp_output(null_ocp):=1;
ocp_no_tables(null_ocp):=0;
ocp_no_states(null_ocp):=1;
ocp_table_base(f):=offset_ocp_info;
ocp_state_base(f):=offset_ocp_info;
ocp_info(null_ocp)(offset_ocp_info) := offset_ocp_info+2; {number of entries}
ocp_info(null_ocp)(offset_ocp_info+1) := offset_ocp_info+5; {number of entries}
ocp_info(null_ocp)(offset_ocp_info+2) := 23; {|OTP_LEFT_START|}
ocp_info(null_ocp)(offset_ocp_info+3) := 3; {|OTP_RIGHT_CHAR|}
ocp_info(null_ocp)(offset_ocp_info+4) := 36; {|OTP_STOP|}
@ @<Put each...@>=
primitive("nullocp", set_ocp, null_ocp);
settext(frozen_null_ocp,"nullocp");
set_new_eqtb(frozen_null_ocp,new_eqtb(cur_val));
geq_define(ocp_active_number_base, data, 0);
geq_define(ocp_active_min_ptr_base, data, 0);
geq_define(ocp_active_max_ptr_base, data, 0);
@ Of course we want to define macros that suppress the detail of how ocp
information is actually packed, so that we don't have to write things like
$$\hbox{|ocp_info[k+ocp_info[j+ocp_state_base[i]]]|}$$
too often. The \.{WEB} definitions here make |ocp_state_entry(i)(j)(k)|
(|ocp_table_entry(i)(j)(k)|) the |k|-th word in the |j|-th state (table)
of the |i|-th ocp.
@^inner loop@>
@d ocp_state_end(#)==#]
@d ocp_state_one(#)==#*2]+ocp_state_end
@d ocp_state_entry(#)==ocp_tables[#,ocp_tables[#,ocp_state_base(#)+ocp_state_one
@d ocp_state_no_end(#)==#*2+1]
@d ocp_state_no(#)==ocp_tables[#,ocp_state_base(#)+ocp_state_no_end
@d ocp_table_end(#)==#]
@d ocp_table_one(#)==#*2]+ocp_table_end
@d ocp_table_entry(#)==ocp_tables[#,ocp_tables[#,ocp_table_base(#)+ocp_table_one
@d ocp_table_no_end(#)==#*2+1]
@d ocp_table_no(#)==ocp_tables[#,ocp_table_base(#)+ocp_table_no_end
@ $\Omega$ checks the information of a \.{OCP} file for validity as the
file is being read in, so that no further checks will be needed when
typesetting is going on. The somewhat tedious subroutine that does this
is called |read_ocp_info|. It has three parameters: the user ocp
identifier~|u|, and the file name and area strings |nom| and |aire|.
The subroutine opens and closes a global file variable called |ocp_file|.
It returns the value of the internal ocp number that was just loaded.
If an error is detected, an error message is issued and no ocp
information is stored; |null_ocp| is returned in this case.
@d bad_ocp=11 {label for |read_ocp_info|}
@d ocp_abort(#)==begin print("OCP file error (");
print(#); print(")"); print_ln; goto bad_ocp end
{do this when the \.{OCP} data is wrong}
@p function read_ocp_info(@!u:pointer;@!nom,@!aire,@!ext:str_number;
@!external_ocp:boolean)
:internal_ocp_number; {input a \.{OCP} file}
label done,bad_ocp,not_found;
var
@!file_opened:boolean; {was |ocp_file| successfully opened?}
@!f:internal_ocp_number; {the new ocp's number}
@!g:internal_ocp_number; {the number to return}
@!ocpword:integer;
@!ocpmem_run_ptr:ocp_index;
@!ocp_length,real_ocp_length:integer; {length of ocp file}
@!previous_address:ocp_index;
@!temp_ocp_input:integer;
@!temp_ocp_output:integer;
@!temp_ocp_no_tables:integer;
@!temp_ocp_no_states:integer;
@!i,new_offset,room_for_tables,room_for_states:integer;
begin g:=null_ocp;@/
@<Read and check the ocp data; |ocp_abort| if the \.{OCP} file is
malformed; if there's no room for this ocp, say so and |goto
done|; otherwise |incr(ocp_ptr)| and |goto done|@>;
bad_ocp: @<Report that the ocp won't be loaded@>;
done: if file_opened then b_close(ocp_file);
ocp_name(f):=nom; ocp_area(f):=aire;
read_ocp_info:=g;
end;
@ $\Omega$ does not give precise details about why it
rejects a particular \.{OCP} file.
@d start_ocp_error_message==print_err("Translation process ");
sprint_cs(u); print_char("="); print_file_name(nom,aire,"");
@<Report that the ocp won't be loaded@>=
start_ocp_error_message;
@.Translation process x=xx not loadable...@>
if file_opened then print(" not loadable: Bad ocp file")
else print(" not loadable: ocp file not found");
help2("I wasn't able to read the data for this ocp,")@/
("so I will ignore the ocp specification.");
error
@ @<Read and check the ocp data...@>=
if external_ocp then
@<Check |ocp_file| exists@>
else begin
@<Open |ocp_file| for input@>;
@<Read the {\.{OCP}} file@>;
end;
@ @<Check |ocp_file| exists@>=
begin
file_opened:=false;
pack_file_name(nom,aire,ext);
b_test_in;
if name_length=0 then ocp_abort("opening file");
f :=ocp_ptr+1;
allocate_ocp_table(f,13);
ocp_file_size(f):=13;
for i:=1 to name_length do begin
append_char(name_of_file[i]);
end;
ocp_external(f):=make_string;
scan_string_argument;
ocp_external_arg(f):=cur_val;
ocp_name(f):=""; ocp_area(f):="";
ocp_state_base(f):=0; ocp_table_base(f):=0;
ocp_input(f):=1; ocp_output(f):=1;
ocp_info(f)(offset_ocp_info):=0;
ocp_ptr:=f; g:=f;
goto done;
end
@ @<Open |ocp_file| for input@>=
file_opened:=false;
pack_file_name(nom,aire,".ocp");
if not b_open_in(ocp_file) then ocp_abort("opening file");
file_opened:=true
@ Note: A malformed \.{OCP} file might be shorter than it claims to be;
thus |eof(ocp_file)| might be true when |read_ocp_info| refers to
|ocp_file^| or when it says |get(ocp_file)|. If such circumstances
cause system error messages, you will have to defeat them somehow,
for example by defining |ocpget| to be `\ignorespaces|begin get(ocp_file);|
|if eof(ocp_file) then ocp_abort; end|\unskip'.
@^system dependencies@>
@d add_to_ocp_info(#)==begin ocp_tables[f,ocpmem_run_ptr]:=#;
incr(ocpmem_run_ptr);
end
@d ocpget==get(ocp_file)
@d ocpbyte==ocp_file^
@d ocp_read(#)==begin ocpword:=ocpbyte;
if ocpword>127 then ocp_abort("checking first octet");
ocpget; ocpword:=ocpword*@'400+ocpbyte;
ocpget; ocpword:=ocpword*@'400+ocpbyte;
ocpget; ocpword:=ocpword*@'400+ocpbyte;
#:=ocpword;
end
@d ocp_read_all(#)==begin ocpget; ocp_read(#); end
@d ocp_read_info==begin ocp_read_all(ocpword);
add_to_ocp_info(ocpword);
end
@ @<Read the {\.{OCP}} file@>=
begin
f :=ocp_ptr+1;
ocpmem_run_ptr:=offset_ocp_info;
ocp_read(ocp_length);
real_ocp_length:=ocp_length-7;
ocp_read_all(temp_ocp_input);
ocp_read_all(temp_ocp_output);
ocp_read_all(temp_ocp_no_tables);
ocp_read_all(room_for_tables);
ocp_read_all(temp_ocp_no_states);
ocp_read_all(room_for_states);
if real_ocp_length <>
(temp_ocp_no_tables + room_for_tables +
temp_ocp_no_states + room_for_states) then
ocp_abort("checking size");
real_ocp_length:=real_ocp_length+12+
temp_ocp_no_states+temp_ocp_no_tables;
allocate_ocp_table(f,real_ocp_length);
ocp_external(f):=0;
ocp_external_arg(f):=0;
ocp_file_size(f):=real_ocp_length;
ocp_input(f):=temp_ocp_input;
ocp_output(f):=temp_ocp_output;
ocp_no_tables(f):=temp_ocp_no_tables;
ocp_no_states(f):=temp_ocp_no_states;
ocp_table_base(f):=ocpmem_run_ptr;
if ocp_no_tables(f) <> 0 then begin
previous_address:=ocpmem_run_ptr+2*(ocp_no_tables(f));
for i:=1 to ocp_no_tables(f) do begin
add_to_ocp_info(previous_address);
ocp_read_all(new_offset);
add_to_ocp_info(new_offset);
previous_address:=previous_address+new_offset;
end
end;
if room_for_tables <> 0 then begin
for i:=1 to room_for_tables do begin
ocp_read_info;
end
end;
ocp_state_base(f):=ocpmem_run_ptr;
if ocp_no_states(f) <> 0 then begin
previous_address:=ocpmem_run_ptr+2*(ocp_no_states(f));
for i:=1 to ocp_no_states(f) do begin
add_to_ocp_info(previous_address);
ocp_read_all(new_offset);
add_to_ocp_info(new_offset);
previous_address:=previous_address+new_offset;
end;
end;
if room_for_states <> 0 then begin
for i:=1 to room_for_states do begin
ocp_read_info;
end
end;
ocp_ptr:=f; g:=f;
goto done;
end
@ Before we forget about the format of these tables, let's deal with
$\Omega$'s basic scanning routine related to ocp information.
@<Declare procedures that scan ocp-related stuff@>=
procedure scan_ocp_ident;
var f:internal_ocp_number;
begin @<Get the next non-blank non-call...@>;
if cur_cmd=set_ocp then f:=cur_chr
else begin print_err("Missing ocp identifier");
@.Missing ocp identifier@>
help2("I was looking for a control sequence whose")@/
("current meaning has been defined by \ocp.");
back_error; f:=null_ocp;
end;
cur_val:=f;
end;
@ Here we begin the \.{OCP} list handling.
@<Types...@>=
@!internal_ocp_list_number=ocp_list_base..ocp_list_biggest;
@!ocp_list_index=integer; {index into |ocp_list_info|}
@!ocp_lstack_index=integer; {index into |ocp_lstack_info|}
@ Here now is the array of ocp arrays.
@d ocp_list_lnext(#)==ocp_list_info[#].hh.b0
@d ocp_list_lstack(#)==ocp_list_info[#].hh.b1
@d ocp_list_lstack_no(#)==ocp_list_info[#+1].sc
@d ocp_lstack_lnext(#)==ocp_lstack_info[#].hh.b0
@d ocp_lstack_ocp(#)==ocp_lstack_info[#].hh.b1
@d make_null_ocp_list==make_ocp_list_node(0,ocp_maxint,0)
@d is_null_ocp_list(#)==ocp_list_lstack_no(#)=ocp_maxint
@d make_null_ocp_lstack==0
@d is_null_ocp_lstack(#)==#=0
@d add_before_op=1
@d add_after_op=2
@d remove_before_op=3
@d remove_after_op=4
@<Glob...@>=
@!ocp_list_info:array[ocp_list_index] of memory_word;
{the big collection of ocp list data}
@!ocp_listmem_ptr:ocp_list_index; {first unused word of |ocp_list_info|}
@!ocp_listmem_run_ptr:ocp_list_index; {temp unused word of |ocp_list_info|}
@!ocp_lstack_info:array[ocp_lstack_index] of memory_word;
{the big collection of ocp lstack data}
@!ocp_lstackmem_ptr:ocp_lstack_index; {first unused word of |ocp_lstack_info|}
@!ocp_lstackmem_run_ptr:ocp_lstack_index; {temp unused word of |ocp_lstack_info|}
@!ocp_list_ptr:internal_ocp_list_number; {largest internal ocp list number in use}
@!ocp_list_list:array[internal_ocp_list_number] of ocp_list_index;
@
@<Initialize table...@>=
ocp_listmem_ptr:=2;
ocp_list_lstack(0):=0;
ocp_list_lstack_no(0):=ocp_maxint;
ocp_list_lnext(0):=0;
ocp_list_ptr:=null_ocp_list;
ocp_list_list[null_ocp_list]:=0;
ocp_lstackmem_ptr:=1;
@ $\Omega$ always knows at least one ocp list, namely the null ocp list.
@ @<Put each...@>=
primitive("nullocplist", set_ocp_list, null_ocp_list);
settext(frozen_null_ocp_list,"nullocplist");
set_new_eqtb(frozen_null_ocp_list,new_eqtb(cur_val));
@ @p function make_ocp_list_node(llstack:ocp_lstack_index;
llstack_no:scaled;
llnext:ocp_list_index):ocp_list_index;
var p:ocp_list_index;
begin
p:=ocp_listmem_run_ptr;
ocp_list_lstack(p):=llstack;
ocp_list_lstack_no(p):=llstack_no;
ocp_list_lnext(p):=llnext;
ocp_listmem_run_ptr:=ocp_listmem_run_ptr+2;
make_ocp_list_node:=p;
end;
function make_ocp_lstack_node(locp:internal_ocp_number;
llnext:ocp_lstack_index) : ocp_lstack_index;
var p:ocp_lstack_index;
begin
p:=ocp_lstackmem_run_ptr;
ocp_lstack_ocp(p):=locp;
ocp_lstack_lnext(p):=llnext;
incr(ocp_lstackmem_run_ptr);
make_ocp_lstack_node:=p;
end;
function copy_ocp_lstack(llstack:ocp_lstack_index):ocp_lstack_index;
var result:ocp_lstack_index;
begin
if is_null_ocp_lstack(llstack) then
result:=make_null_ocp_lstack
else
result:=make_ocp_lstack_node(ocp_lstack_ocp(llstack),
copy_ocp_lstack(ocp_lstack_lnext(llstack)));
copy_ocp_lstack:=result;
end;
function copy_ocp_list(list:ocp_list_index):ocp_list_index;
var result:ocp_list_index;
begin
if is_null_ocp_list(list) then
result:=make_null_ocp_list
else
result:=make_ocp_list_node(copy_ocp_lstack(ocp_list_lstack(list)),
ocp_list_lstack_no(list),
copy_ocp_list(ocp_list_lnext(list)));
copy_ocp_list:=result;
end;
function ocp_ensure_lstack(list:ocp_list_index; llstack_no:scaled):
ocp_list_index;
var p:ocp_list_index;
q:ocp_list_index;
begin
p:=list;
if is_null_ocp_list(p) then begin
ocp_list_lstack_no(p) := llstack_no;
ocp_list_lnext(p) := make_null_ocp_list;
end
else if ocp_list_lstack_no(p) > llstack_no then begin
ocp_list_lnext(p):=
make_ocp_list_node(ocp_list_lstack(p),
ocp_list_lstack_no(p),
ocp_list_lnext(p));
ocp_list_lstack(p):=0;
ocp_list_lstack_no(p):=llstack_no;
end
else begin
q:=ocp_list_lnext(p);
while (not (is_null_ocp_list(q))) and
ocp_list_lstack_no(q) <= llstack_no do begin
p:=q; q:=ocp_list_lnext(q);
end;
if ocp_list_lstack_no(p) < llstack_no then begin
ocp_list_lnext(p) := make_ocp_list_node(0, llstack_no, q);
p := ocp_list_lnext(p);
end;
end;
ocp_ensure_lstack := p;
end;
procedure ocp_apply_add(list_entry:ocp_list_index;
lbefore:boolean;
locp:internal_ocp_number);
var p:ocp_lstack_index;
q:ocp_lstack_index;
begin
p := ocp_list_lstack(list_entry);
if lbefore or (p=0) then begin
ocp_list_lstack(list_entry) := make_ocp_lstack_node(locp, p);
end
else begin
q:=ocp_lstack_lnext(p);
while q<>0 do begin
p:=q; q:=ocp_lstack_lnext(q);
end;
ocp_lstack_lnext(p):=make_ocp_lstack_node(locp, null);
end;
end;
procedure ocp_apply_remove(list_entry:ocp_list_index;
lbefore:boolean);
var p:ocp_lstack_index;
q:ocp_lstack_index;
r:ocp_lstack_index;
begin
p := ocp_list_lstack(list_entry);
if p=0 then begin
print_err("warning: stack entry already empty"); print_ln
end
else begin
q := ocp_lstack_lnext(p);
if lbefore or (q=0) then
ocp_list_lstack(list_entry) := q
else begin
r:=ocp_lstack_lnext(q);
while r <> 0 do begin
p:=q; q:=r; r:=ocp_lstack_lnext(r);
end;
ocp_lstack_lnext(p) := null;
end
end;
end;
procedure scan_scaled; {sets |cur_val| to a scaled value}
label done, done1, done2, found, not_found, attach_fraction;
var negative:boolean; {should the answer be negated?}
@!f:integer; {numerator of a fraction whose denominator is $2^{16}$}
@!k,@!kk:small_number; {number of digits in a decimal fraction}
@!p,@!q:pointer; {top of decimal digit stack}
begin f:=0; arith_error:=false; negative:=false;
@<Get the next non-blank non-sign...@>;
back_input;
if cur_tok=continental_point_token then cur_tok:=point_token;
if cur_tok<>point_token then scan_int
else begin radix:=10; cur_val:=0;
end;
if cur_tok=continental_point_token then cur_tok:=point_token;
if (radix=10)and(cur_tok=point_token) then @<Scan decimal fraction@>;
if cur_val<0 then {in this case |f=0|}
begin negative := not negative; negate(cur_val);
end;
if cur_val>@'40000 then arith_error:=true
else cur_val := cur_val*unity +f;
if arith_error or(abs(cur_val)>=@'10000000000) then
begin print_err("Stack number too large");
end;
if negative then negate(cur_val);
end;
procedure print_ocp_lstack(lstack_entry:ocp_lstack_index);
var p:ocp_lstack_index;
begin
p:=lstack_entry;
while (p<>0) do begin
print_esc(ocp_id_text(ocp_lstack_ocp(p)));
p:=ocp_lstack_lnext(p);
if (p<>0) then print(",");
end;
end;
procedure print_ocp_list(list_entry:ocp_list_index);
var p:ocp_list_index;
begin
print("["); p:=list_entry;
while not (is_null_ocp_list(p)) do begin
print("(");
print_scaled(ocp_list_lstack_no(p));
print(" : ");
print_ocp_lstack(ocp_list_lstack(p));
print(")");
p:=ocp_list_lnext(p);
if not (is_null_ocp_list(p)) then print(", ");
end;
print("]");
end;
function scan_ocp_list: ocp_list_index;
var llstack_no:scaled;
lop:quarterword;
lstack_entry:ocp_list_index;
other_list:ocp_list_index;
ocp_ident:internal_ocp_number;
result:ocp_list_index;
begin
get_r_token;
if cur_cmd = set_ocp_list then
result := copy_ocp_list(ocp_list_list[cur_chr])
else if cur_cmd <> ocp_list_op then begin
print_err("Bad ocp list specification");
@.Bad ocp list specification@>
help1("I was looking for a ocp list specification.");
result := make_null_ocp_list;
end
else begin
lop:=cur_chr;
scan_scaled; llstack_no:=cur_val;
if (llstack_no<=0) or (llstack_no>=ocp_maxint) then begin
print_err("Stack numbers must be between 0 and 4096 (exclusive)");
result := make_null_ocp_list;
end
else begin
if lop <= add_after_op then begin
scan_ocp_ident; ocp_ident:=cur_val;
end;
other_list:=scan_ocp_list;
lstack_entry:=ocp_ensure_lstack(other_list, llstack_no);
if lop <= add_after_op then
ocp_apply_add(lstack_entry, (lop=add_before_op), ocp_ident)
else
ocp_apply_remove(lstack_entry, (lop=remove_before_op));
result:=other_list;
end;
end;
scan_ocp_list:=result;
end;
function read_ocp_list: internal_ocp_list_number;
var f:internal_ocp_list_number;
g:internal_ocp_list_number;
begin
g:=null_ocp_list;
f:=ocp_list_ptr+1;
ocp_listmem_run_ptr:=ocp_listmem_ptr;
ocp_lstackmem_run_ptr:=ocp_lstackmem_ptr;
ocp_list_list[f]:=scan_ocp_list;
ocp_list_ptr:=f;
ocp_listmem_ptr:=ocp_listmem_run_ptr;
ocp_lstackmem_ptr:=ocp_lstackmem_run_ptr;
g:=f;
read_ocp_list:=g;
end;
procedure scan_ocp_list_ident;
var f:internal_ocp_list_number;
begin @<Get the next non-blank non-call...@>;
if cur_cmd=set_ocp_list then f:=cur_chr
else begin print_err("Missing ocp list identifier");
@.Missing ocp list identifier@>
help2("I was looking for a control sequence whose")@/
("current meaning has been defined by \ocplist.");
back_error; f:=null_ocp_list;
end;
cur_val:=f;
end;
@z
%---------------------------------------
@x [49] m.1210 l.22629 - Omega OCP
any_mode(set_interaction):prefixed_command;
@y
any_mode(set_interaction),
any_mode(set_ocp),
any_mode(def_ocp),
any_mode(set_ocp_list),
any_mode(def_ocp_list),
any_mode(clear_ocp_lists),
any_mode(push_ocp_list),
any_mode(pop_ocp_list),
any_mode(ocp_list_op),
any_mode(ocp_trace_level) : prefixed_command;
@z
%---------------------------------------
@x [50] m.1302 l.23682 - Omega OCP
@<Dump the font information@>;
@y
@<Dump the font information@>;
@<Dump the ocp information@>;
@<Dump the ocp list information@>;
@z
%---------------------------------------
@x [50] m.1303 l.23711 - Omega OCP
@<Undump the font information@>;
@y
@<Undump the font information@>;
@<Undump the ocp information@>;
@<Undump the ocp list information@>;
@z
%---------------------------------------
@x [50] m.1323 l.24907 - Omega OCP
begin undump_font_table(k);@/
end
@y
begin undump_font_table(k);@/
end
@ @<Dump the ocp information@>=
dump_int(ocp_ptr);
for k:=null_ocp to ocp_ptr do
@<Dump the array info for internal ocp number |k|@>;
print_ln; print_int(ocp_ptr-ocp_base); print(" preloaded ocp");
if ocp_ptr<>ocp_base+1 then print_char("s")
@ @<Undump the ocp information@>=
undump_size(ocp_base)(ocp_biggest)('ocp max')(ocp_ptr);
for k:=null_ocp to ocp_ptr do
@<Undump the array info for internal ocp number |k|@>
@ @<Dump the array info for internal ocp number |k|@>=
begin dump_ocp_table(k);
print_nl("\ocp"); print_esc(ocp_id_text(k)); print_char("=");
print_file_name(ocp_name(k),ocp_area(k),"");
end
@ @<Undump the array info for internal ocp number |k|@>=
begin undump_ocp_table(k);
end
@ @<Dump the ocp list information@>=
dump_int(ocp_listmem_ptr);
for k:=0 to ocp_listmem_ptr-1 do dump_wd(ocp_list_info[k]);
dump_int(ocp_list_ptr);
for k:=null_ocp_list to ocp_list_ptr do begin
dump_int(ocp_list_list[k]);
print_nl("\ocplist");
print_esc(ocp_list_id_text(k));
print_char("=");
print_ocp_list(ocp_list_list[k]);
end;
dump_int(ocp_lstackmem_ptr);
for k:=0 to ocp_lstackmem_ptr-1 do dump_wd(ocp_lstack_info[k])
@ @<Undump the ocp list information@>=
undump_size(1)(1000000)('ocp list mem size')(ocp_listmem_ptr);
for k:=0 to ocp_listmem_ptr-1 do undump_wd(ocp_list_info[k]);
undump_size(ocp_list_base)(ocp_list_biggest)('ocp list max')(ocp_list_ptr);
for k:=null_ocp_list to ocp_list_ptr do
undump_int(ocp_list_list[k]);
undump_size(1)(1000000)('ocp lstack mem size')(ocp_lstackmem_ptr);
for k:=0 to ocp_lstackmem_ptr-1 do undump_wd(ocp_lstack_info[k])
@z
%---------------------------------------
@x
@* \[54] $\Omega$ changes.
@y
@* \[54] $\Omega$ changes.
@ Here we do the main work required for reading and interpreting
$\Omega$ Compiled Translation Processes.
@ @<Put each...@>=
primitive("ocp", def_ocp, 0);
primitive("externalocp", def_ocp, 1);
primitive("ocplist", def_ocp_list, 0);
primitive("pushocplist", push_ocp_list, 0);
primitive("popocplist", pop_ocp_list, 0);
primitive("clearocplists", clear_ocp_lists, 0);
primitive("addbeforeocplist", ocp_list_op, add_before_op);
primitive("addafterocplist", ocp_list_op, add_after_op);
primitive("removebeforeocplist", ocp_list_op, remove_before_op);
primitive("removeafterocplist", ocp_list_op, remove_after_op);
primitive("ocptracelevel", ocp_trace_level, 0);
set_equiv(ocp_trace_level_base,0);
@ @<Cases of |print_cmd_chr|...@>=
set_ocp: begin
print("select ocp ");
slow_print(ocp_name(chr_code));
end;
def_ocp: if cur_chr=0 then print_esc("ocp")
else print_esc("externalocp");
set_ocp_list: print("select ocp list ");
def_ocp_list: print_esc("ocplist");
push_ocp_list: print_esc("pushocplist");
pop_ocp_list: print_esc("popocplist");
clear_ocp_lists: print_esc("clearocplists");
ocp_list_op:
if chr_code=add_before_op then print_esc("addbeforeocplist")
else if chr_code=add_after_op then print_esc("addafterocplist")
else if chr_code=remove_before_op then print_esc("removebeforeocplist")
else {|chr_code|=|remove_after_op|} print_esc("removeafterocplist");
ocp_trace_level: print_esc("ocptracelevel");
@ @<Assignments@>=
set_ocp: begin
print_err("To use ocps, use the "); print_esc("pushocplist");
print(" primitive");print_ln
end;
def_ocp: new_ocp(a);
set_ocp_list: begin
print_err("To use ocp lists, use the ");
print_esc("pushocplist"); print(" primitive");print_ln
end;
def_ocp_list: new_ocp_list(a);
push_ocp_list: do_push_ocp_list(a);
pop_ocp_list: do_pop_ocp_list(a);
clear_ocp_lists: do_clear_ocp_lists(a);
ocp_list_op: begin
print_err("To build ocp lists, use the ");
print_esc("ocplist"); print(" primitive"); print_ln
end;
ocp_trace_level: begin scan_optional_equals; scan_int;
if cur_val<>0 then cur_val:=1;
define(ocp_trace_level_base, data, cur_val);
end;
@ @<Declare subprocedures for |prefixed_command|@>=
procedure new_ocp(@!a:small_number);
label common_ending;
var u:pointer; {user's ocp identifier}
@!f:internal_ocp_number; {runs through existing ocps}
@!t:str_number; {name for the frozen ocp identifier}
@!old_setting:0..max_selector; {holds |selector| setting}
@!flushable_string:str_number; {string not yet referenced}
@!external_ocp:boolean; {external binary file}
begin if job_name=0 then open_log_file;
{avoid confusing \.{texput} with the ocp name}
@.texput@>
if cur_chr=1 then external_ocp:=true
else external_ocp:=false;
get_r_token; u:=cur_cs;
if u>=hash_base then t:=newtext(u)
else if u>=single_base then
if u=null_cs then t:="OCP"@+else t:=u-single_base
else begin old_setting:=selector; selector:=new_string;
print("OCP"); print(u-active_base); selector:=old_setting;
@.OCPx@>
str_room(1); t:=make_string;
end;
define(u,set_ocp,null_ocp); scan_optional_equals; scan_file_name;
@<If this ocp has already been loaded, set |f| to the internal
ocp number and |goto common_ending|@>;
f:=read_ocp_info(u,cur_name,cur_area,cur_ext,external_ocp);
common_ending:
set_equiv(u,f); set_new_eqtb(ocp_id_base+f,new_eqtb(u));
settext(ocp_id_base+f,t);
if equiv(ocp_trace_level_base)=1 then begin
print_nl(""); print_esc("ocp"); print_esc(t); print("="); print(cur_name);
end;
end;
@ When the user gives a new identifier to a ocp that was previously loaded,
the new name becomes the ocp identifier of record. OCP names `\.{xyz}' and
`\.{XYZ}' are considered to be different.
@<If this ocp has already been loaded...@>=
flushable_string:=str_ptr-1;
for f:=ocp_base+1 to ocp_ptr do
if str_eq_str(ocp_name(f),cur_name)and str_eq_str(ocp_area(f),cur_area) then
begin
if cur_name=flushable_string then begin
flush_string; cur_name:=ocp_name(f);
end;
goto common_ending
end
@ @<Declare subprocedures for |prefixed_command|@>=
procedure new_ocp_list(@!a:small_number);
var u:pointer; {user's ocp list identifier}
@!f:internal_ocp_list_number; {runs through existing ocp lists}
@!t:str_number; {name for the frozen ocp list identifier}
@!old_setting:0..max_selector; {holds |selector| setting}
begin if job_name=0 then open_log_file;
{avoid confusing \.{texput} with the ocp list name}
@.texput@>
get_r_token; u:=cur_cs;
if u>=hash_base then t:=newtext(u)
else if u>=single_base then
if u=null_cs then t:="OCPLIST"@+else t:=u-single_base
else begin old_setting:=selector; selector:=new_string;
print("OCPLIST"); print(u-active_base); selector:=old_setting;
@.OCPx@>
str_room(1); t:=make_string;
end;
define(u,set_ocp_list,null_ocp_list); scan_optional_equals;
f:=read_ocp_list;
set_equiv(u,f); set_new_eqtb(ocp_list_id_base+f,new_eqtb(u));
settext(ocp_list_id_base+f,t);
if equiv(ocp_trace_level_base)=1 then begin
print_nl(""); print_esc("ocplist"); print_esc(t); print("=");
print_ocp_list(ocp_list_list[f]);
end;
end;
@ @<Declare subprocedures for |prefixed_command|@>=
procedure do_push_ocp_list(@!a:small_number);
var ocp_list_no:halfword;
old_number:halfword;
i:integer;
begin
scan_ocp_list_ident; ocp_list_no:=cur_val;
old_number:=equiv(ocp_active_number_base);
define(ocp_active_base+old_number, data, ocp_list_no);
define(ocp_active_number_base, data, (old_number+1));
if equiv(ocp_trace_level_base)=1 then begin
print_nl("New active ocp list: {");
for i:=old_number downto 0 do begin
print_esc(ocp_list_id_text(equiv(ocp_active_base+i)));
print("="); print_ocp_list(ocp_list_list[equiv(ocp_active_base+i)]);
if i<>0 then print(",");
end;
print("}");
end;
active_compile;
define(ocp_active_min_ptr_base, data, active_min_ptr);
define(ocp_active_max_ptr_base, data, active_max_ptr);
end;
@ @<Declare subprocedures for |prefixed_command|@>=
procedure do_pop_ocp_list(@!a:small_number);
var old_number:halfword;
i:integer;
begin
old_number:=equiv(ocp_active_number_base);
if old_number=0 then begin
print_err("No active ocp lists to be popped");
end
else
define(ocp_active_number_base, data, (old_number-1));
if equiv(ocp_trace_level_base)=1 then begin
print_nl("New active ocp list: {");
for i:=(old_number-2) downto 0 do begin
print_esc(ocp_list_id_text(equiv(ocp_active_base+i)));
print("="); print_ocp_list(ocp_list_list[equiv(ocp_active_base+i)]);
if i<>0 then print(",");
end;
print("}");
end;
active_compile;
define(ocp_active_min_ptr_base, data, active_min_ptr);
define(ocp_active_max_ptr_base, data, active_max_ptr);
end;
@ @<Declare subprocedures for |prefixed_command|@>=
procedure do_clear_ocp_lists(@!a:small_number);
begin
define(ocp_active_number_base, data, 0);
active_compile;
define(ocp_active_min_ptr_base, data, active_min_ptr);
define(ocp_active_max_ptr_base, data, active_max_ptr);
end;
@z
%---------------------------------------
|