summaryrefslogtreecommitdiff
path: root/Build/source/texk/web2c/alephdir/omstr.ch
blob: f23ca0c293364fe2632dc524cc666db8b9a80298 (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
% omstr.ch: String manipulation
%
% This file is part of the Omega project, which
% is based on the web2c distribution of TeX.
%
% Copyright (c) 1994--2000 John Plaice and Yannis Haralambous
% 
% This library is free software; you can redistribute it and/or
% modify it under the terms of the GNU Library General Public
% License as published by the Free Software Foundation; either
% version 2 of the License, or (at your option) any later version.
% 
% This library 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
% Library General Public License for more details.
% 
% You should have received a copy of the GNU Library General Public
% License along with this library; if not, write to the Free Software
% Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
%
%---------------------------------------
@x [2] m.17 l.510 - Omega
In order to make \TeX\ readily portable to a wide variety of
computers, all of its input text is converted to an internal eight-bit
@y
In order to make $\Omega$ readily portable to a wide variety of
computers, all of its input text is converted to an internal 31-bit
@z
%---------------------------------------
@x [2] m.18 l.537 - Omega
@!ASCII_code=0..255; {eight-bit numbers}
@y
@!ASCII_code=0..biggest_char;
@z
%---------------------------------------
@x [2] m.19 l.567 - Omega
@d last_text_char=255 {ordinal number of the largest element of |text_char|}
@y
@d last_text_char=biggest_char 
   {ordinal number of the largest element of |text_char|}
@z
%---------------------------------------
@x [2] m.20 l.577 - Omega
@!xord: array [text_char] of ASCII_code;
  {specifies conversion of input characters}
@!xchr: array [ASCII_code] of text_char;
  {specifies conversion of output characters}
@y
@!xchr: array [0..255] of text_char;
  {specifies conversion of output characters}
@z
%---------------------------------------
@x [2] m.23 l.724 - Omega
for i:=0 to @'37 do xchr[i]:=' ';
for i:=@'177 to @'377 do xchr[i]:=' ';
@y
for i:=0 to @'37 do xchr[i]:=chr(i);
for i:=@'177 to @'377 do xchr[i]:=chr(i);
init_eqtb_table;
@z
%---------------------------------------
@x [2] m.24 l.734 - Omega
for i:=first_text_char to last_text_char do xord[chr(i)]:=invalid_code;
for i:=@'200 to @'377 do xord[xchr[i]]:=i;
for i:=0 to @'176 do xord[xchr[i]]:=i;
@y
@z
%---------------------------------------
@x [3] m.25 l.772 - Omega
@!eight_bits=0..255; {unsigned one-byte quantity}
@!alpha_file=packed file of text_char; {files that contain textual data}
@!byte_file=packed file of eight_bits; {files that contain binary data}
@y
@!eight_bits=0..biggest_char; {unsigned two-byte quantity}
@!real_eight_bits=0..255; {dvi output uses exactly 8 bits}
@!alpha_file=packed file of text_char; {files that contain textual data}
@!byte_file=packed file of real_eight_bits; {files that contain binary data}
@z
%---------------------------------------
@x [3] m.31 l.947 - Omega
    buffer[last]:=xord[f^]; get(f); incr(last);
@y
    buffer[last]:=f^; get(f); incr(last);
@z
%---------------------------------------
@x [4] m.38 l.1099 - Omega
String numbers 0 to 255 are reserved for strings that correspond to single
ASCII characters. This is in accordance with the conventions of \.{WEB},
@y
String numbers 0 to |biggest_char| are reserved for strings that correspond to 
single ASCII characters. This is in accordance with the conventions of \.{WEB},
@z
%---------------------------------------
@x [4] m.38 l.1109 - Omega
ASCII character, so the first 256 strings are used to specify exactly what
should be printed for each of the 256 possibilities.
@y
ASCII character, so the first |biggest_char+1| strings are used to specify 
exactly what should be printed for each of the |biggest_char+1| possibilities.
@z
%---------------------------------------
@x [4] m.38-9 l.1122 - Omega
@d si(#) == # {convert from |ASCII_code| to |packed_ASCII_code|}
@d so(#) == # {convert from |packed_ASCII_code| to |ASCII_code|}

@<Types...@>=
@!pool_pointer = 0..pool_size; {for variables that point into |str_pool|}
@!str_number = 0..max_strings; {for variables that point into |str_start|}
@!packed_ASCII_code = 0..255; {elements of |str_pool| array}

@ @<Glob...@>=
@!str_pool:packed array[pool_pointer] of packed_ASCII_code; {the characters}
@!str_start : array[str_number] of pool_pointer; {the starting pointers}
@y
@d si(#) == # {convert from |ASCII_code| to |packed_ASCII_code|}
@d so(#) == # {convert from |packed_ASCII_code| to |ASCII_code|}
@d str_start(#) == str_start_ar[#-too_big_char]

@<Types...@>=
@!pool_pointer = 0..pool_size; {for variables that point into |str_pool|}
@!str_number = 0..max_strings; {for variables that point into |str_start|}
@!packed_ASCII_code = 0..65535; {elements of |str_pool| array}

@ @<Glob...@>=
@!str_pool:packed array[pool_pointer] of packed_ASCII_code; {the characters}
@!str_start_ar : array[str_number] of pool_pointer; {the starting pointers}
@z
%---------------------------------------
@x [4] m.40 l.1145 - Omega
@d length(#)==(str_start[#+1]-str_start[#]) {the number of characters
  in string number \#}
@y
@p function length(s:str_number):integer;
   {the number of characters in string number |s|}
begin if (s>=@"10000) then length:=str_start(s+1)-str_start(s)
else if (s>=@"20) and (s<@"7F) then length:=1
else if (s<=@"7F) then length:=3
else if (s<@"100) then length:=4
else length:=8
end;
@z
%---------------------------------------
@x [4] m.41 l.1150 - Omega
@d cur_length == (pool_ptr - str_start[str_ptr])
@y
@d cur_length == (pool_ptr - str_start(str_ptr))
@z
%---------------------------------------
@x [4] m.43 l.1181 - Omega
incr(str_ptr); str_start[str_ptr]:=pool_ptr;
@y
incr(str_ptr); str_start(str_ptr):=pool_ptr;
@z
%---------------------------------------
@x [4] m.44 l.1187 - Omega
@d flush_string==begin decr(str_ptr); pool_ptr:=str_start[str_ptr];
@y
@d flush_string==begin decr(str_ptr); pool_ptr:=str_start(str_ptr);
@z
%---------------------------------------
@x [4] m.45 l.1201 - Omega
begin j:=str_start[s];
while j<str_start[s+1] do
@y
begin j:=str_start(s);
while j<str_start(s+1) do
@z
%---------------------------------------
@x [4] m.46 l.1222 - Omega
@p function str_eq_str(@!s,@!t:str_number):boolean;
  {test equality of strings}
label not_found; {loop exit}
var j,@!k: pool_pointer; {running indices}
@!result: boolean; {result of comparison}
begin result:=false;
if length(s)<>length(t) then goto not_found;
j:=str_start[s]; k:=str_start[t];
while j<str_start[s+1] do
  begin if str_pool[j]<>str_pool[k] then goto not_found;
  incr(j); incr(k);
  end;
result:=true;
not_found: str_eq_str:=result;
end;
@y
@p function str_eq_str(@!s,@!t:str_number):boolean;
  {test equality of strings}
label not_found; {loop exit}
var j,@!k: pool_pointer; {running indices}
@!result: boolean; {result of comparison}
begin result:=false;
if length(s)<>length(t) then goto not_found;
if (length(s)=1) then begin
  if s<65536 then begin
    if t<65536 then begin
      if s<>t then goto not_found;
      end
    else begin
      if s<>str_pool[str_start(t)] then goto not_found;
      end;
    end
  else begin
    if t<65536 then begin
      if str_pool[str_start(s)]<>t then goto not_found;
      end
    else begin
      if str_pool[str_start(s)]<>str_pool[str_start(t)] then
        goto not_found;
      end;
    end;
  end
else begin
  j:=str_start(s); k:=str_start(t);
  while j<str_start(s+1) do
    begin if str_pool[j]<>str_pool[k] then goto not_found;
    incr(j); incr(k);
    end;
  end;
result:=true;
not_found: str_eq_str:=result;
end;
@z
%---------------------------------------
@x [4] m.47 l.1240 - Omega
var k,@!l:0..255; {small indices or counters}
@y
var k,@!l:0..biggest_char; {small indices or counters}
@z
%---------------------------------------
@x [4] m.47 l.1245 - Omega
begin pool_ptr:=0; str_ptr:=0; str_start[0]:=0;
@<Make the first 256 strings@>;
@<Read the other strings from the \.{TEX.POOL} file and return |true|,
@y
begin pool_ptr:=0; str_ptr:=0; str_start_ar[0]:=0; str_start_ar[1]:=0;
@<Make the first strings@>;
@<Read the other strings from the \.{OMEGA.POOL} file and return |true|,
@z
%---------------------------------------
% A hack is made for strings 256 through to 65535.
% String 256 becomes "^^^^????".  All the strings
% from 256 to 65535 are made to point at this string,
% which will never be printed:  it's just a placeholder.

@x [4] m.48 l.1255 - Omega
@<Make the first 256...@>=
for k:=0 to 255 do
  begin if (@<Character |k| cannot be printed@>) then
    begin append_char("^"); append_char("^");
    if k<@'100 then append_char(k+@'100)
    else if k<@'200 then append_char(k-@'100)
    else begin app_lc_hex(k div 16); app_lc_hex(k mod 16);
      end;
    end
  else append_char(k);
  g:=make_string;
  end
@y
@<Make the first ...@>=
begin
str_ptr:=too_big_char;
end
@z
%---------------------------------------
@x [4] m.49 l.1279 - Omega
Unprintable characters of codes 128--255 are, similarly, rendered
\.{\^\^80}--\.{\^\^ff}.
@y
Unprintable characters of codes 128--255 are, similarly, rendered
\.{\^\^80}--\.{\^\^ff}.

Unprintable characters of codes 256--|biggest_char| are, similarly, rendered
\.{\^\^\^\^0100}--\.{\^\^\^\^ffff}.

@z
%---------------------------------------
@x [4] m.49 l.1295 - Omega
@<Character |k| cannot be printed@>=
  (k<" ")or(k>"~")
@y
@z
%---------------------------------------
@x [4] m.50 l.1298 - Omega
@ When the \.{WEB} system program called \.{TANGLE} processes the \.{TEX.WEB}
description that you are now reading, it outputs the \PASCAL\ program
\.{TEX.PAS} and also a string pool file called \.{TEX.POOL}. The \.{INITEX}
@y
@ When the \.{WEB} system program called \.{OTANGLE} processes the \.{OMEGA.WEB}
description that you are now reading, it outputs the \PASCAL\ program
\.{OMEGA.PAS} and also a string pool file called \.{OMEGA.POOL}. The \.{INITEX}
@z
%---------------------------------------
@x [4] m.51 l.1322 - Omega
else  bad_pool('! I can''t read TEX.POOL.')
@.I can't read TEX.POOL@>
@y
else  bad_pool('! I can''t read OMEGA.POOL.')
@.I can't read OMEGA.POOL@>
@z
%---------------------------------------
@x [4] m.52 l.1326 - Omega
begin if eof(pool_file) then bad_pool('! TEX.POOL has no check sum.');
@.TEX.POOL has no check sum@>
@y
begin if eof(pool_file) then bad_pool('! OMEGA.POOL has no check sum.');
@.OMEGA.POOL has no check sum@>
@z
%---------------------------------------
@x [4] m.52 l.1332 - Omega
else  begin if (xord[m]<"0")or(xord[m]>"9")or@|
      (xord[n]<"0")or(xord[n]>"9") then
    bad_pool('! TEX.POOL line doesn''t begin with two digits.');
@.TEX.POOL line doesn't...@>
  l:=xord[m]*10+xord[n]-"0"*11; {compute the length}
  if pool_ptr+l+string_vacancies>pool_size then
    bad_pool('! You have to increase POOLSIZE.');
@.You have to increase POOLSIZE@>
  for k:=1 to l do
    begin if eoln(pool_file) then m:=' '@+else read(pool_file,m);
    append_char(xord[m]);
@y
else  begin if (m<"0")or(m>"9")or@|
      (n<"0")or(n>"9") then
    bad_pool('! OMEGA.POOL line doesn''t begin with two digits.');
@.OMEGA.POOL line doesn't...@>
  l:=m*10+n-"0"*11; {compute the length}
  if pool_ptr+l+string_vacancies>pool_size then
    bad_pool('! You have to increase POOLSIZE.');
@.You have to increase POOLSIZE@>
  for k:=1 to l do
    begin if eoln(pool_file) then m:=' '@+else read(pool_file,m);
    append_char(m);
@z
%---------------------------------------
@x [4] m.53 l.1347 - Omega
end of this \.{TEX.POOL} file; any other value means that the wrong pool
@y
end of this \.{OMEGA.POOL} file; any other value means that the wrong pool
@z
%---------------------------------------
@x [4] m.53 l.1354 - Omega
loop@+  begin if (xord[n]<"0")or(xord[n]>"9") then
  bad_pool('! TEX.POOL check sum doesn''t have nine digits.');
@.TEX.POOL check sum...@>
  a:=10*a+xord[n]-"0";
@y
loop@+  begin if (n<"0")or(n>"9") then
  bad_pool('! OMEGA.POOL check sum doesn''t have nine digits.');
@.OMEGA.POOL check sum...@>
  a:=10*a+n-"0";
@z
%---------------------------------------
@x [4] m.53 l.1360 - Omega
done: if a<>@$ then bad_pool('! TEX.POOL doesn''t match; TANGLE me again.');
@.TEX.POOL doesn't match@>
@y
done: if a<>@$ then bad_pool('! OMEGA.POOL doesn''t match; OTANGLE me again.');
@.OMEGA.POOL doesn't match@>
@z
%---------------------------------------
% When we print a string, we must make sure we do the appropriate
% thing for strings 256 through to 65535.  We must generate the
% strings on the fly.

@x [5] m.59 l.1496 - Omega
@ An entire string is output by calling |print|. Note that if we are outputting
the single standard ASCII character \.c, we could call |print("c")|, since
|"c"=99| is the number of a single-character string, as explained above. But
|print_char("c")| is quicker, so \TeX\ goes directly to the |print_char|
routine when it knows that this is safe. (The present implementation
assumes that it is always safe to print a visible ASCII character.)
@^system dependencies@>

@<Basic print...@>=
procedure print(@!s:integer); {prints string |s|}
label exit;
var j:pool_pointer; {current character code position}
@!nl:integer; {new-line character to restore}
begin if s>=str_ptr then s:="???" {this can't happen}
@.???@>
else if s<256 then
  if s<0 then s:="???" {can't happen}
  else begin if selector>pseudo then
      begin print_char(s); return; {internal strings are not expanded}
      end;
    if (@<Character |s| is the current new-line character@>) then
      if selector<pseudo then
        begin print_ln; return;
        end;
    nl:=new_line_char; new_line_char:=-1;
      {temporarily disable new-line character}
    j:=str_start[s];
    while j<str_start[s+1] do
      begin print_char(so(str_pool[j])); incr(j);
      end;
    new_line_char:=nl; return;
    end;
j:=str_start[s];
while j<str_start[s+1] do
@y
@ An entire string is output by calling |print|. Note that if we are outputting
the single standard ASCII character \.c, we could call |print("c")|, since
|"c"=99| is the number of a single-character string, as explained above. But
|print_char("c")| is quicker, so \TeX\ goes directly to the |print_char|
routine when it knows that this is safe. (The present implementation
assumes that it is always safe to print a visible ASCII character.)
@^system dependencies@>

@d print_lc_hex(#)==l:=#;
   if l<10 then print_char(l+"0") else print_char(l-10+"a");

@<Basic print...@>=
procedure print(@!s:integer); {prints string |s|}
label exit;
var j:pool_pointer; {current character code position}
@!nl:integer; {new-line character to restore}
@!l:integer; {for printing 16-bit characters}
begin if s>=str_ptr then s:="???" {this can't happen}
@.???@>
else if s<biggest_char then
  if s<0 then s:="???" {can't happen}
  else begin if selector>pseudo then
      begin print_char(s); return; {internal strings are not expanded}
      end;
    if (@<Character |s| is the current new-line character@>) then
      if selector<pseudo then
        begin print_ln; return;
        end;
    nl:=new_line_char;
    @<Set newline character to -1@>;
    if s<@"20 then begin
      print_char(@"5E); print_char(@"5E); print_char(s+@'100);
      end
    else if s<@"7F then
      print_char(s)
    else if s=@"7F then begin
      print_char(@"5E); print_char(@"5E); print_char(s-@'100);
      end
    else if s<@"100 then begin
      print_char(@"5E); print_char(@"5E);
      print_lc_hex((s mod @"100) div @"10); print_lc_hex(s mod @"10);
      end
    else begin {Here is where we generate the strings on the fly.}
      print_char(@"5E); print_char(@"5E);
      print_char(@"5E); print_char(@"5E);
      print_lc_hex(s div @"1000); print_lc_hex((s mod @"1000) div @"100);
      print_lc_hex((s mod @"100) div @"10); print_lc_hex(s mod @"10);
      end;
    @<Set newline character to nl@>;
    return;
    end;
j:=str_start(s);
while j<str_start(s+1) do
@z
%---------------------------------------
@x [5] m.60 l.1539 - Omega
procedure slow_print(@!s:integer); {prints string |s|}
var j:pool_pointer; {current character code position}
begin if (s>=str_ptr) or (s<256) then print(s)
else begin j:=str_start[s];
  while j<str_start[s+1] do
@y
procedure slow_print(@!s:integer); {prints string |s|}
var j:pool_pointer; {current character code position}
begin if (s>=str_ptr) or (s<=biggest_char) then print(s)
else begin j:=str_start(s);
  while j<str_start(s+1) do
@z
%---------------------------------------
@x [5] m.61 l.1556 - Omega
wterm(banner);
if format_ident=0 then wterm_ln(' (no format preloaded)')
else  begin slow_print(format_ident); print_ln;
  end;
update_terminal;
@y
wterm(banner);
if format_ident=0 then wterm_ln(' (no format preloaded)')
else  begin slow_print(format_ident); print_ln;
  end;
wterm_ln('Copyright (c) 1994--2000 John Plaice and Yannis Haralambous');
update_terminal;
@z
%---------------------------------------
@x [5] m.63 l.1576 - Omega
procedure print_esc(@!s:str_number); {prints escape character, then |s|}
var c:integer; {the escape character code}
begin  @<Set variable |c| to the current escape character@>;
if c>=0 then if c<256 then print(c);
@y
procedure print_esc(@!s:str_number); {prints escape character, then |s|}
var c:integer; {the escape character code}
begin  @<Set variable |c| to the current escape character@>;
if c>=0 then if c<=biggest_char then print(c);
@z
%---------------------------------------
@x [5] m.69 l.1654 - Omega
@p procedure print_roman_int(@!n:integer);
label exit;
var j,@!k: pool_pointer; {mysterious indices into |str_pool|}
@!u,@!v: nonnegative_integer; {mysterious numbers}
begin j:=str_start["m2d5c2l5x2v5i"]; v:=1000;
@y
@p procedure print_roman_int(@!n:integer);
label exit;
var j,@!k: pool_pointer; {mysterious indices into |str_pool|}
@!u,@!v: nonnegative_integer; {mysterious numbers}
begin j:=str_start("m2d5c2l5x2v5i"); v:=1000;
@z
%---------------------------------------
@x [5] m.70 l.1674 - Omega
@p procedure print_current_string; {prints a yet-unmade string}
var j:pool_pointer; {points to current character code}
begin j:=str_start[str_ptr];
@y
@p procedure print_current_string; {prints a yet-unmade string}
var j:pool_pointer; {points to current character code}
begin j:=str_start(str_ptr);
@z
%---------------------------------------
@x [6] m.94 l.2052 - Omega
print_err("TeX capacity exceeded, sorry [");
@y
print_err("Omega capacity exceeded, sorry [");
@z
%---------------------------------------
@x [18] m.260 l.5532 - Omega
while pool_ptr>str_start[str_ptr] do
@y
while pool_ptr>str_start(str_ptr) do
@z
%---------------------------------------
@x [18] m.264 l.5610 - Omega
else  begin k:=str_start[s]; l:=str_start[s+1]-k;
@y
else  begin k:=str_start(s); l:=str_start(s+1)-k;
@z
%---------------------------------------
@x [24] m.341 l.7219 - Omega
@!c,@!cc:ASCII_code; {constituents of a possible expanded code}
@!d:2..3; {number of excess characters in an expanded code}
@y
@!c,@!cc,@!ccc,@!cccc:ASCII_code; {constituents of a possible expanded code}
@!d:2..7; {number of excess characters in an expanded code}
@z
%---------------------------------------
@x [24] m.352 l.7349 - Omega
  else cur_chr:=16*cur_chr+cc-"a"+10
@y
  else cur_chr:=16*cur_chr+cc-"a"+10
@d long_hex_to_cur_chr==
  if c<="9" then cur_chr:=c-"0" @+else cur_chr:=c-"a"+10;
  if cc<="9" then cur_chr:=16*cur_chr+cc-"0"
  else cur_chr:=16*cur_chr+cc-"a"+10;
  if ccc<="9" then cur_chr:=16*cur_chr+ccc-"0"
  else cur_chr:=16*cur_chr+ccc-"a"+10;
  if cccc<="9" then cur_chr:=16*cur_chr+cccc-"0"
  else cur_chr:=16*cur_chr+cccc-"a"+10
 
@z
%---------------------------------------
@x [24] m.352 l.7353 - Omega
  begin c:=buffer[loc+1]; @+if c<@'200 then {yes we have an expanded char}
@y
  begin if (cur_chr=buffer[loc+1]) and (cur_chr=buffer[loc+2]) and
           ((loc+6)<=limit) then 
     begin c:=buffer[loc+3]; cc:=buffer[loc+4]; 
       ccc:=buffer[loc+5]; cccc:=buffer[loc+6];
       if is_hex(c) and is_hex(cc) and is_hex(ccc) and is_hex(cccc) then 
       begin loc:=loc+7; long_hex_to_cur_chr; goto reswitch;
       end;
     end;
  c:=buffer[loc+1]; @+if c<@'200 then {yes we have an expanded char}
@z
%---------------------------------------
@x [24] m.355 l.7416 - Omega
begin if buffer[k]=cur_chr then @+if cat=sup_mark then @+if k<limit then
  begin c:=buffer[k+1]; @+if c<@'200 then {yes, one is indeed present}
    begin d:=2;
    if is_hex(c) then @+if k+2<=limit then
      begin cc:=buffer[k+2]; @+if is_hex(cc) then incr(d);
      end;
    if d>2 then
      begin hex_to_cur_chr; buffer[k-1]:=cur_chr;
      end
    else if c<@'100 then buffer[k-1]:=c+@'100
    else buffer[k-1]:=c-@'100;
    limit:=limit-d; first:=first-d;
    while k<=limit do
      begin buffer[k]:=buffer[k+d]; incr(k);
      end;
    goto start_cs;
    end;
  end;
end

@y
begin if buffer[k]=cur_chr then @+if cat=sup_mark then @+if k<limit then
  begin if (cur_chr=buffer[k+1]) and (cur_chr=buffer[k+2]) and 
           ((k+6)<=limit) then 
     begin c:=buffer[k+3]; cc:=buffer[k+4]; 
       ccc:=buffer[k+5]; cccc:=buffer[k+6];
       if is_hex(c) and is_hex(cc) and is_hex(ccc) and is_hex(cccc) then 
       begin d:=7; long_hex_to_cur_chr; buffer[k-1]:=cur_chr;
             while k<=limit do
                begin buffer[k]:=buffer[k+d]; incr(k);
                end;
             goto start_cs;
       end
     end
     else begin 
       c:=buffer[k+1]; @+if c<@'200 then {yes, one is indeed present}
       begin 
          d:=2;
          if is_hex(c) then @+if k+2<=limit then
            begin cc:=buffer[k+2]; @+if is_hex(cc) then incr(d);
            end;
          if d>2 then
            begin hex_to_cur_chr; buffer[k-1]:=cur_chr;
            end
          else if c<@'100 then buffer[k-1]:=c+@'100
          else buffer[k-1]:=c-@'100;
          limit:=limit-d; first:=first-d;
          while k<=limit do
            begin buffer[k]:=buffer[k+d]; incr(k);
            end;
          goto start_cs;
       end
     end
  end
end
@z
%---------------------------------------
@x [26] m.407 l.8216 - Omega
begin p:=backup_head; link(p):=null; k:=str_start[s];
while k<str_start[s+1] do
  begin get_x_token; {recursion is possible here}
@^recursion@>
  if (cur_cs=0)and@|
   ((cur_chr=so(str_pool[k]))or(cur_chr=so(str_pool[k])-"a"+"A")) then
    begin store_new_token(cur_tok); incr(k);
    end
  else if (cur_cmd<>spacer)or(p<>backup_head) then
    begin back_input;
    if p<>backup_head then back_list(link(backup_head));
    scan_keyword:=false; return;
    end;
  end;
@y
begin p:=backup_head; link(p):=null;
if s<too_big_char then begin
  while true do
    begin get_x_token; {recursion is possible here}
@^recursion@>
    if (cur_cs=0)and@|
       ((cur_chr=s)or(cur_chr=s-"a"+"A")) then
      begin store_new_token(cur_tok);
      flush_list(link(backup_head)); scan_keyword:=true; return;
      end
    else if (cur_cmd<>spacer)or(p<>backup_head) then
      begin back_input;
      if p<>backup_head then back_list(link(backup_head));
      scan_keyword:=false; return;
      end;
    end;
  end;
k:=str_start(s);
while k<str_start(s+1) do
  begin get_x_token; {recursion is possible here}
@^recursion@>
  if (cur_cs=0)and@|
   ((cur_chr=so(str_pool[k]))or(cur_chr=so(str_pool[k])-"a"+"A")) then
    begin store_new_token(cur_tok); incr(k);
    end
  else if (cur_cmd<>spacer)or(p<>backup_head) then
    begin back_input;
    if p<>backup_head then back_list(link(backup_head));
    scan_keyword:=false; return;
    end;
  end;
@z
%---------------------------------------
@x [29] m.517 l.10005 - Omega
@p procedure end_name;
begin if str_ptr+3>max_strings then
  overflow("number of strings",max_strings-init_str_ptr);
@:TeX capacity exceeded number of strings}{\quad number of strings@>
if area_delimiter=0 then cur_area:=""
else  begin cur_area:=str_ptr;
  str_start[str_ptr+1]:=str_start[str_ptr]+area_delimiter; incr(str_ptr);
  end;
if ext_delimiter=0 then
  begin cur_ext:=""; cur_name:=make_string;
  end
else  begin cur_name:=str_ptr;
  str_start[str_ptr+1]:=str_start[str_ptr]+ext_delimiter-area_delimiter-1;
@y
@p procedure end_name;
begin if str_ptr+3>max_strings then
  overflow("number of strings",max_strings-init_str_ptr);
@:TeX capacity exceeded number of strings}{\quad number of strings@>
if area_delimiter=0 then cur_area:=""
else  begin cur_area:=str_ptr;
  str_start(str_ptr+1):=str_start(str_ptr)+area_delimiter; incr(str_ptr);
  end;
if ext_delimiter=0 then
  begin cur_ext:=""; cur_name:=make_string;
  end
else  begin cur_name:=str_ptr;
  str_start(str_ptr+1):=str_start(str_ptr)+ext_delimiter-area_delimiter-1;
@z
%---------------------------------------
@x [29] m.519 l.10039 - Omega
  if k<=file_name_size then name_of_file[k]:=xchr[c];
  end

@p procedure pack_file_name(@!n,@!a,@!e:str_number);
var k:integer; {number of positions filled in |name_of_file|}
@!c: ASCII_code; {character being packed}
@!j:pool_pointer; {index into |str_pool|}
begin k:=0;
for j:=str_start[a] to str_start[a+1]-1 do append_to_name(so(str_pool[j]));
for j:=str_start[n] to str_start[n+1]-1 do append_to_name(so(str_pool[j]));
for j:=str_start[e] to str_start[e+1]-1 do append_to_name(so(str_pool[j]));
@y
  if k<=file_name_size then name_of_file[k]:=xchr[c];
  end

@p procedure pack_file_name(@!n,@!a,@!e:str_number);
var k:integer; {number of positions filled in |name_of_file|}
@!c: ASCII_code; {character being packed}
@!j:pool_pointer; {index into |str_pool|}
begin k:=0;
for j:=str_start(a) to str_start(a+1)-1 do append_to_name(so(str_pool[j]));
for j:=str_start(n) to str_start(n+1)-1 do append_to_name(so(str_pool[j]));
for j:=str_start(e) to str_start(e+1)-1 do append_to_name(so(str_pool[j]));
@z
%---------------------------------------
@x [29] m.523 l.10095 - Omega
for j:=1 to n do append_to_name(xord[TEX_format_default[j]]);
for j:=a to b do append_to_name(buffer[j]);
for j:=format_default_length-format_ext_length+1 to format_default_length do
  append_to_name(xord[TEX_format_default[j]]);
@y
for j:=1 to n do append_to_name(TEX_format_default[j]);
for j:=a to b do append_to_name(buffer[j]);
for j:=format_default_length-format_ext_length+1 to format_default_length do
  append_to_name(TEX_format_default[j]);
@z
%---------------------------------------
@x [29] m.524 l.10155 - Omega
else  begin for k:=1 to name_length do append_char(xord[name_of_file[k]]);
@y
else  begin for k:=1 to name_length do append_char(name_of_file[k]);
@z
%---------------------------------------
@x [29] m.536 l.10324 - Omega
begin wlog(banner);
slow_print(format_ident); print("  ");
print_int(day); print_char(" ");
months:='JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC';
for k:=3*month-2 to 3*month do wlog(months[k]);
print_char(" "); print_int(year); print_char(" ");
print_two(time div 60); print_char(":"); print_two(time mod 60);
end
@y
begin wlog(banner);
slow_print(format_ident); print_nl("");
print_int(day); print_char(" ");
months:='JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC';
for k:=3*month-2 to 3*month do wlog(months[k]);
print_char(" "); print_int(year); print_char(" ");
print_two(time div 60); print_char(":"); print_two(time mod 60);
print_nl("Copyright (c) 1994--2000 John Plaice and Yannis Haralambous");
end
@z
%---------------------------------------
@x [32] m.595 l.11860 - Omega
@!dvi_buf:array[dvi_index] of eight_bits; {buffer for \.{DVI} output}
@y
@!dvi_buf:array[dvi_index] of real_eight_bits; {buffer for \.{DVI} output}
@z
%---------------------------------------
@x [32] m.617 l.12262 - Omega
  print(" TeX output "); print_int(year); print_char(".");
@y
  print("Omega output, Version 3.141592--1.15, ");
  print_int(year); print_char(".");
@z
%---------------------------------------
@x [32] m.617 l.12267 - Omega
  for s:=str_start[str_ptr] to pool_ptr-1 do dvi_out(so(str_pool[s]));
  pool_ptr:=str_start[str_ptr]; {flush the current string}
@y
  for s:=str_start(str_ptr) to pool_ptr-1 do dvi_out(so(str_pool[s]));
  pool_ptr:=str_start(str_ptr); {flush the current string}
@z
%---------------------------------------
@x [36] m.765 l.15021 - Omega
magic_offset:=str_start[math_spacing]-9*ord_noad
@y
magic_offset:=str_start(math_spacing)-9*ord_noad
@z
%---------------------------------------
@x [42] m.931 l.18172 - Omega
  begin j:=1; u:=str_start[k];
@y
  begin j:=1; u:=str_start(k);
@z
%---------------------------------------
@x [42] m.940 l.18296 - Omega
u:=str_start[k]; v:=str_start[s];
repeat if str_pool[u]<str_pool[v] then goto found;
if str_pool[u]>str_pool[v] then goto not_found;
incr(u); incr(v);
until u=str_start[k+1];
@y
u:=str_start(k); v:=str_start(s);
repeat if str_pool[u]<str_pool[v] then goto found;
if str_pool[u]>str_pool[v] then goto not_found;
incr(u); incr(v);
until u=str_start(k+1);
@z
%---------------------------------------
@x [49] m.1252 l.23232 - Omega
    print_err("Patterns can be loaded only by INITEX");
@y
    print_err("Patterns can be loaded only by INIOMEGA");
@z
%---------------------------------------
@x [50] m.1301 l.23682 - Omega
format_ident:=" (INITEX)";
@y
format_ident:=" (INIOMEGA)";
@z
%---------------------------------------
% We do not store any information for strings between 257 and 65535.

@x [50] m.1309 l.23814 - Omega
for k:=0 to str_ptr do dump_int(str_start[k]);
@y
for k:=too_big_char to str_ptr do dump_int(str_start(k));
@z
%---------------------------------------
% We recreate the information for strings between 257 and 65535.

@x [50] m.1310 l.23831 - Omega
for k:=0 to str_ptr do undump(0)(pool_ptr)(str_start[k]);
@y
for k:=too_big_char to str_ptr do undump(0)(pool_ptr)(str_start(k));
@z
%---------------------------------------
@x [51] m.1334 l.24266 - Omega
  wlog_ln('Here is how much of TeX''s memory',' you used:');
@y
  wlog_ln('Here is how much of Omega''s memory',' you used:');
@z
%---------------------------------------
@x [51] m.1335 l.24338 - Omega
  print_nl("(\dump is performed only by INITEX)"); return;
@:dump_}{\.{\\dump...only by INITEX}@>
@y
  print_nl("(\dump is performed only by INIOMEGA)"); return;
@:dump_}{\.{\\dump...only by INIOMEGA}@>
@z
%---------------------------------------
@x [53] m.1368 l.24747 - Omega
for k:=str_start[str_ptr] to pool_ptr-1 do dvi_out(so(str_pool[k]));
pool_ptr:=str_start[str_ptr]; {erase the string}
@y
for k:=str_start(str_ptr) to pool_ptr-1 do dvi_out(so(str_pool[k]));
pool_ptr:=str_start(str_ptr); {erase the string}
@z
%---------------------------------------