summaryrefslogtreecommitdiff
path: root/Build/source/texk/web2c/ptexdir/ptex-base.ch
blob: bd850b61a733c695da506dab0579b7d9d067a190 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
% This is a change file for pTeX
% By Sadayuki Tanaka and ASCII MEDIA WORKS.
%
% Thanks for :
%    Ryoichi Kurasawa (us009185@interramp.com),
%    Hisato Hamano,
%    Hiroto Kagotani (kagotani@in.it.okayama-u.ac.jp),
%    Takashi Kakiuchi (kakiuchi@sy6.isl.mei.co.jp),
%    Yoichi Kawabata (kawabata@canon.co.jp),
%    Makoto Kobayashi (makoto@lloem.fujidenki.co.jp),
%    Yoshihiro Aoki (aoki@tokyo-shoseki-ptg.co.jp),
%    Akira Kakuto (kakuto@fuk.kindai.ac.jp).
%    Koich Inoue (inoue@ma.ns.musashi-tech.ac.jp).
%
% (??/??/87) RKS jTeX 2.9 -- j1.0
% (??/??/89) RKS jTeX 2.93 -- j1.3
% (12/ 9/89) H_2 pTeX 2.93 j1.3 p1.0.1
% (12/??/89) RKS jTeX 2.95 -- j1.5
% (12/??/89) RKS jTeX 2.99 -- j1.5
% (02/02/90) RKS jTeX 2.99 -- j1.6
% (04/16/90) H_2 pTeX 2.99 j1.6 p1.0.3
% (09/14/90) H_2 pTeX 2.99 j1.6 p1.0.9 -- pre-release
% (10/29/90) H_2 Bug fix (p1.0.9a)
% (01/21/92) H_2 jTeX 2.99 - j1.7
% (01/21/92) H_2 pTeX 2.99 j1.7 p1.0.9F
% (03/09/92) H_2 pTeX 2.99 j1.7 p1.0.9G jflag BUG
% (03/20/95) KN  pTeX p2.0 (based on 3.1415)
% (09/08/95) KN  pTeX p2.1
% (09/20/95) KN  pTeX p2.1.1
% (11/21/95) KN  pTeX p2.1.4
% (08/27/97) KN  pTeX p2.1.5 (based on 3.14159)
% (02/26/98) KN  pTeX p2.1.6
% (03/19/98) KN  pTeX p2.1.7
% (03/26/98) KN  pTeX p2.1.8 (Web2c 7.2)
% (02/21/2000) KN  pTeX p2.1.9 (Web2c 7.3.1)
% (11/13/2000) KN  pTeX p2.1.10
% (05/22/2001) KN  pTeX p2.1.11
% (03/10/2001) KN  pTeX p3.0 (modified BSD licence)
% (09/02/2004) ST  pTeX p3.1.4
% (11/29/2004) KN  pTeX p3.1.5
% (12/13/2004) KN  pTeX p3.1.8
% (10/17/2005) ST  pTeX p3.1.9
% (07/18/2006) ST  pTeX p3.1.10
% (08/17/2009) ST  pTeX p3.1.11
% (05/23/2010) AK  Bug fix by Hironori Kitagawa.
% (31/12/2010) AK  Bug fix and accent Kanji by Hironori Kitagawa.
% (19/01/2011) PB  Let \lastkern etc act through disp node.
% (15/04/2011) PB  pTeX p3.2 Add \ifdbox and \ifddir
% (2011-08-18) PB  Bug fix by Hironori Kitagawa.
% (2012-05-11) PB  pTeX p3.3
% (2013-04-09) PB  pTeX p3.4 (TL 2013)
% (2014-04-17) KB  pTeX p3.5 (TL 2014)
% (2014-03-15) KB  pTeX p3.6 (TL 2015)
% (2015-09-10) AK  pTeX p3.7 Bug fix by Hironori Kitagawa in flushing choice node.
% (2016-03-04) AK  Hironori Kitagawa added new primitives to improve typesetting
%                  with non-vanishing \ybaselineshift.
% (2016-06-06) AK  Hironori Kitagawa fixed a bug in check_box(box_p:pointer).
%                  pTeX p3.7.1.
% (2017-09-07) HK  pTeX p3.7.2 More restrictions on direction change commands.
% (2018-01-21) HK  Added \ptexversion primitive and co. pTeX p3.8.
% (2018-04-14) HK  pTeX p3.8.1 Bug fix for discontinuous KINSOKU table.
%

@x
% Here is TeX material that gets inserted after \input webmac
@y
% Here is TeX material that gets inserted after \input webmac
\def\pTeX{p\kern-.15em\TeX}
@z

@x [1.2] l.200 - pTeX:
@d banner==TeX_banner
@d banner_k==TeX_banner_k
@y
@d pTeX_version=3
@d pTeX_minor_version=8
@d pTeX_revision==".2"
@d pTeX_version_string=='-p3.8.2' {current \pTeX\ version}
@#
@d pTeX_banner=='This is pTeX, Version 3.14159265',pTeX_version_string
@d pTeX_banner_k==pTeX_banner
  {printed when \pTeX\ starts}
@#
@d banner==pTeX_banner
@d banner_k==pTeX_banner_k
@z

@x [2.??] l.586 - pTeX:
@!ASCII_code=0..255; {eight-bit numbers}
@y
@!ASCII_code=0..255; {eight-bit numbers}
@!KANJI_code=0..65535; {sixteen-bit numbers}
@z

@x [3.??] l.870 - pTeX:
@!eight_bits=0..255; {unsigned one-byte quantity}
@y
@!eight_bits=0..255; {unsigned one-byte quantity}
@!sixteen_bits=0..65535; {unsigned two-bytes quantity}
@z

@x [3.??] l.891 - pTeX:
@ All of the file opening functions are defined in C.
@y
@ All of the file opening functions are defined in C.

@ Kanji code handling.
@z

@x [4.47] l.1325 - pTeX:
@!init function get_strings_started:boolean; {initializes the string pool,
  but returns |false| if something goes wrong}
label done,exit;
var k,@!l:0..255; {small indices or counters}
@y
@!init function get_strings_started:boolean; {initializes the string pool,
  but returns |false| if something goes wrong}
label done,exit;
var k,@!l:KANJI_code; {small indices or counters}
@z

@x [4.49] l.1384 - pTeX:
@<Character |k| cannot be printed@>=
  (k<" ")or(k>"~")
@y
@<Character |k| cannot be printed@>=
   not (ismultiprn(k) or xprn[k])
@z

@x [5.54] l.1514 - pTeX: Global variables
@!trick_buf:array[0..ssup_error_line] of ASCII_code; {circular buffer for
  pseudoprinting}
@y
@!trick_buf:array[0..ssup_error_line] of ASCII_code; {circular buffer for
  pseudoprinting}
@!trick_buf2:array[0..ssup_error_line] of 0..2; {pTeX: buffer for KANJI}
@!kcode_pos: 0..2; {pTeX: denotes whether first byte or second byte of KANJI}
@!prev_char: ASCII_code;
@z

@x [5.55] l.1519 - pTeX: Initialize the kcode_pos
@ @<Initialize the output routines@>=
selector:=term_only; tally:=0; term_offset:=0; file_offset:=0;
@y
@ @<Initialize the output routines@>=
selector:=term_only; tally:=0; term_offset:=0; file_offset:=0;
kcode_pos:=0;
@z

@x [5.57] l.1538 - pTeX: kcode_pos
procedure print_ln; {prints an end-of-line}
begin case selector of
term_and_log: begin wterm_cr; wlog_cr;
  term_offset:=0; file_offset:=0;
  end;
log_only: begin wlog_cr; file_offset:=0;
  end;
term_only: begin wterm_cr; term_offset:=0;
  end;
no_print,pseudo,new_string: do_nothing;
othercases write_ln(write_file[selector])
endcases;@/
@y
procedure print_ln; {prints an end-of-line}
begin case selector of
term_and_log: begin
  if kcode_pos=1 then begin wterm(' '); wlog(' '); end;
  wterm_cr; wlog_cr; term_offset:=0; file_offset:=0;
  end;
log_only: begin if kcode_pos=1 then wlog(' ');
  wlog_cr; file_offset:=0;
  end;
term_only: begin if kcode_pos=1 then wterm(' ');
  wterm_cr; term_offset:=0;
  end;
no_print,pseudo,new_string: do_nothing;
othercases write_ln(write_file[selector])
endcases;@/
kcode_pos:=0;
@z

@x [5.58] l.1557 - pTeX: kcode_pos, trick_buf2
procedure print_char(@!s:ASCII_code); {prints a single character}
label exit;
begin if @<Character |s| is the current new-line character@> then
 if selector<pseudo then
  begin print_ln; return;
  end;
case selector of
term_and_log: begin wterm(xchr[s]); wlog(xchr[s]);
  incr(term_offset); incr(file_offset);
  if term_offset=max_print_line then
    begin wterm_cr; term_offset:=0;
    end;
  if file_offset=max_print_line then
    begin wlog_cr; file_offset:=0;
    end;
  end;
log_only: begin wlog(xchr[s]); incr(file_offset);
  if file_offset=max_print_line then print_ln;
  end;
term_only: begin wterm(xchr[s]); incr(term_offset);
  if term_offset=max_print_line then print_ln;
  end;
no_print: do_nothing;
pseudo: if tally<trick_count then trick_buf[tally mod error_line]:=s;
@y
procedure print_char(@!s:ASCII_code); {prints a single character}
label exit; {label is not used but nonetheless kept (for other changes?)}
begin if @<Character |s| is the current new-line character@> then
 if selector<pseudo then
  begin print_ln; return;
  end;
if kcode_pos=1 then kcode_pos:=2
else if iskanji1(xchr[s]) then
  begin kcode_pos:=1;
  if (selector=term_and_log)or(selector=log_only) then
    if file_offset>=max_print_line-1 then
       begin wlog_cr; file_offset:=0;
       end;
  if (selector=term_and_log)or(selector=term_only) then
    if term_offset>=max_print_line-1 then
       begin wterm_cr; term_offset:=0;
       end;
  end
else kcode_pos:=0;
case selector of
term_and_log: begin wterm(xchr[s]); incr(term_offset);
  if term_offset=max_print_line then
    begin wterm_cr; term_offset:=0;
    end;
  wlog(xchr[s]); incr(file_offset);
  if file_offset=max_print_line then
    begin wlog_cr; file_offset:=0;
    end;
  end;
log_only: begin wlog(xchr[s]); incr(file_offset);
  if file_offset=max_print_line then print_ln;
  end;
term_only: begin wterm(xchr[s]); incr(term_offset);
  if term_offset=max_print_line then print_ln;
  end;
no_print: do_nothing;
pseudo: if tally<trick_count then
  begin trick_buf[tally mod error_line]:=s;
  trick_buf2[tally mod error_line]:=kcode_pos;
  end;
@z

@x l.1603 - pTeX
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
  begin print_char(so(str_pool[j])); incr(j);
  end;
exit:end;
@y
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
  begin print_char(so(str_pool[j])); incr(j);
  end;
exit:end;
@z

@x [5.61] l.1656 - pTeX:
@<Initialize the output...@>=
if src_specials_p or file_line_error_style_p or parse_first_line_p then
  wterm(banner_k)
else
  wterm(banner);
@y
@<Initialize the output...@>=
if src_specials_p or file_line_error_style_p or parse_first_line_p then
  wterm(banner_k)
else
  wterm(banner);
  wterm(' (');
  wterm(conststringcast(get_enc_string));
  wterm(')');
@z

@x [8.111] l.2436 - pTeX: check hi/ho
  (mem_top+sup_main_memory>=max_halfword) then bad:=14;
@y
  (mem_top+sup_main_memory>=max_halfword)or@|
  (hi(0)<>0) then bad:=14;
@z

@x [8.112] l.2450 - pTeX: hi/ho
sufficiently large.
@y
sufficiently large and this is required for \pTeX.
@z

@x [8.112] l.2588 - pTeX:
@d ho(#)==# {to take a sixteen-bit item from a halfword}
@y
@d ho(#)==# {to take a sixteen-bit item from a halfword}
@d KANJI(#)==# {pTeX: to output a KANJI code}
@d tokanji(#)==# {pTeX: to take a KANJI code from a halfword}
@d tonum(#)==# {pTeX: to put a KANJI code into a halfword}
@z

@x [10.135] l.2895 - pTeX: box_dir
|fil|, |fill|, or |filll|). The |subtype| field is not used.
@y
|fil|, |fill|, or |filll|). The |subtype| field is not used in \TeX.
In \pTeX\ the |subtype| field records the box direction |box_dir|.
@z

@x [10.135] l.2897 - pTeX: box_dir, space_ptr, xspace_ptr
@d hlist_node=0 {|type| of hlist nodes}
@d box_node_size=7 {number of words to allocate for a box node}
@d width_offset=1 {position of |width| field in a box node}
@d depth_offset=2 {position of |depth| field in a box node}
@d height_offset=3 {position of |height| field in a box node}
@d width(#) == mem[#+width_offset].sc {width of the box, in sp}
@d depth(#) == mem[#+depth_offset].sc {depth of the box, in sp}
@d height(#) == mem[#+height_offset].sc {height of the box, in sp}
@d shift_amount(#) == mem[#+4].sc {repositioning distance, in sp}
@d list_offset=5 {position of |list_ptr| field in a box node}
@d list_ptr(#) == link(#+list_offset) {beginning of the list inside the box}
@d glue_order(#) == subtype(#+list_offset) {applicable order of infinity}
@d glue_sign(#) == type(#+list_offset) {stretching or shrinking}
@d normal=0 {the most common case when several cases are named}
@d stretching = 1 {glue setting applies to the stretch components}
@d shrinking = 2 {glue setting applies to the shrink components}
@d glue_offset = 6 {position of |glue_set| in a box node}
@d glue_set(#) == mem[#+glue_offset].gr
  {a word of type |glue_ratio| for glue setting}
@y
@d hlist_node=0 {|type| of hlist nodes}
@d box_node_size=8 {number of words to allocate for a box node}
@#
@d dir_max = 5 {the maximal absolute value of direction}
@d box_dir(#) == (qo(subtype(#))-dir_max) {direction of a box}
@d set_box_dir(#) == subtype(#):=set_box_dir_end
@d set_box_dir_end(#) == qi(#)+dir_max
@#
@d dir_default = 0 {direction of the box, default Left to Right}
@d dir_dtou = 1 {direction of the box, Bottom to Top}
@d dir_tate = 3 {direction of the box, Top to Bottom}
@d dir_yoko = 4 {direction of the box, equal default}
@d any_dir == dir_yoko,dir_tate,dir_dtou
@#
@d width_offset=1 {position of |width| field in a box node}
@d depth_offset=2 {position of |depth| field in a box node}
@d height_offset=3 {position of |height| field in a box node}
@d width(#) == mem[#+width_offset].sc {width of the box, in sp}
@d depth(#) == mem[#+depth_offset].sc {depth of the box, in sp}
@d height(#) == mem[#+height_offset].sc {height of the box, in sp}
@d shift_amount(#) == mem[#+4].sc {repositioning distance, in sp}
@d list_offset=5 {position of |list_ptr| field in a box node}
@d list_ptr(#) == link(#+list_offset) {beginning of the list inside the box}
@d glue_order(#) == subtype(#+list_offset) {applicable order of infinity}
@d glue_sign(#) == type(#+list_offset) {stretching or shrinking}
@d normal=0 {the most common case when several cases are named}
@d stretching = 1 {glue setting applies to the stretch components}
@d shrinking = 2 {glue setting applies to the shrink components}
@d glue_offset = 6 {position of |glue_set| in a box node}
@d glue_set(#) == mem[#+glue_offset].gr
  {a word of type |glue_ratio| for glue setting}
@d space_offset = 7 {position of |glue_set| in a box node}
@d space_ptr(#) == link(#+space_offset)
@d xspace_ptr(#) == info(#+space_offset)
@z

@x [10.136] l.3037 - pTeX: space_ptr, xspace_ptr
width(p):=0; depth(p):=0; height(p):=0; shift_amount(p):=0; list_ptr(p):=null;
glue_sign(p):=normal; glue_order(p):=normal; set_glue_ratio_zero(glue_set(p));
@y
width(p):=0; depth(p):=0; height(p):=0; shift_amount(p):=0; list_ptr(p):=null;
glue_sign(p):=normal; glue_order(p):=normal; set_glue_ratio_zero(glue_set(p));
space_ptr(p):=zero_glue; xspace_ptr(p):=zero_glue; set_box_dir(p)(dir_default);
add_glue_ref(zero_glue); add_glue_ref(zero_glue);
@z

@x [10.137] l.3045 - pTeX: direction change node
@d vlist_node=1 {|type| of vlist nodes}
@y
@d vlist_node=1 {|type| of vlist nodes}

@ A |dir_node| stands for direction change.

@d dir_node=2 {|type| of dir nodes}

@p function new_dir_node(b:pointer; dir:eight_bits):pointer;
var p:pointer; {the new node}
begin if type(b)>vlist_node then confusion("new_dir_node:not box");
p:=new_null_box; type(p):=dir_node; set_box_dir(p)(dir);
case abs(box_dir(b)) of
  dir_yoko: @<Yoko to other direction@>;
  dir_tate: @<Tate to other direction@>;
  dir_dtou: @<DtoU to other direction@>;
  othercases confusion("new_dir_node:illegal dir");
endcases;
link(b):=null; list_ptr(p):=b;
new_dir_node:=p;
end;

@ @<Yoko to other direction@>=
  case dir of
  dir_tate: begin width(p):=height(b)+depth(b);
      depth(p):=width(b)/2; height(p):=width(b)-depth(p);
      end;
  dir_dtou: begin width(p):=height(b)+depth(b);
      depth(p):=0; height(p):=width(b);
      end;
  othercases confusion("new_dir_node:y->?");
  endcases

@ @<Tate to other direction@>=
  case dir of
  dir_yoko: begin width(p):=height(b)+depth(b);
      depth(p):=0; height(p):=width(b);
      end;
  dir_dtou: begin width(p):=width(b);
      depth(p):=height(b); height(p):=depth(b);
      end;
  othercases confusion("new_dir_node:t->?");
  endcases

@ @<DtoU to other direction@>=
  case dir of
  dir_yoko: begin width(p):=height(b)+depth(b);
      depth(p):=0; height(p):=width(b);
      end;
  dir_tate: begin width(p):=width(b);
      depth(p):=height(b); height(p):=depth(b);
      end;
  othercases confusion("new_dir_node:d->?");
  endcases
@z

@x [10.138] l.3054 - pTeX: renumber rule_node
@d rule_node=2 {|type| of rule nodes}
@y
@d rule_node=3 {|type| of rule nodes}
@z

@x [10.140] l.3083 - pTeX: renumber ins_node, add ins_dirh field
@d ins_node=3 {|type| of insertion nodes}
@d ins_node_size=5 {number of words to allocate for an insertion}
@d float_cost(#)==mem[#+1].int {the |floating_penalty| to be used}
@d ins_ptr(#)==info(#+4) {the vertical list to be inserted}
@d split_top_ptr(#)==link(#+4) {the |split_top_skip| to be used}
@y
@d ins_node=4 {|type| of insertion nodes}
@d ins_node_size=6 {number of words to allocate for an insertion}
@d float_cost(#)==mem[#+1].int {the |floating_penalty| to be used}
@d ins_ptr(#)==info(#+4) {the vertical list to be inserted}
@d split_top_ptr(#)==link(#+4) {the |split_top_skip| to be used}
@d ins_dir(#)==(subtype(#+5)-dir_max) {direction of |ins_node|}
@d set_ins_dir(#) == subtype(#+5):=set_box_dir_end
@z

@x [10.141] l.3089 - pTeX: disp_node
@ A |mark_node| has a |mark_ptr| field that points to the reference count
@y
@ A |disp_node| has a |disp_dimen| field that points to the displacement
distance of the baselineshift between Latin characters and Kanji chatacters.

@d disp_node=5 {|type| of a displace node}
@d disp_dimen(#)==mem[#+1].sc

@ A |mark_node| has a |mark_ptr| field that points to the reference count
@z

@x [10.140] l.3095 - pTeX: renumber nodes
@d mark_node=4 {|type| of a mark node}
@y
@d mark_node=6 {|type| of a mark node}
@z

@x [10.141] l.3105 - pTeX: renumber nodes
@d adjust_node=5 {|type| of an adjust node}
@y
@d adjust_node=7 {|type| of an adjust node}
@z

@x [10.142] l.3122 - pTeX: renumber nodes
@d ligature_node=6 {|type| of a ligature node}
@y
@d ligature_node=8 {|type| of a ligature node}
@z

@x [10.145] l.3163 - pTeX: renumber nodes
@d disc_node=7 {|type| of a discretionary node}
@y
@d disc_node=9 {|type| of a discretionary node}
@z

@x [10.146] l.3191 - pTeX: renumber nodes
@d whatsit_node=8 {|type| of special extension nodes}
@y
@d whatsit_node=10 {|type| of special extension nodes}
@z

@x [10.147] l.3198 - pTeX: renumber nodes
@d math_node=9 {|type| of a math node}
@y
@d math_node=11 {|type| of a math node}
@z

@x [10.150] l.3244 - pTeX: renumber nodes
@d glue_node=10 {|type| of node that points to a glue specification}
@y
@d glue_node=12 {|type| of node that points to a glue specification}
@z

@x [10.155] l.3342 - pTeX: renumber nodes
@d kern_node=11 {|type| of a kern node}
@d explicit=1 {|subtype| of kern nodes from \.{\\kern} and \.{\\/}}
@d acc_kern=2 {|subtype| of kern nodes from accents}
@y
@d kern_node=13 {|type| of a kern node}
@d explicit=1 {|subtype| of kern nodes from \.{\\kern}}
@d acc_kern=2 {|subtype| of kern nodes from accents}
@d ita_kern=3 {|subtype| of kern nodes from \.{\\/}}
@z

@x [10.157] l.3363 - pTeX: renumber nodes
@d penalty_node=12 {|type| of a penalty node}
@y
@d penalty_node=14 {|type| of a penalty node}
@d widow_pena=1 {|subtype| of penalty nodes from \.{\\jcharwidowpenalty}}
@d kinsoku_pena=2 {|subtype| of penalty nodes from kinsoku}
@z

@x [10.159] l.3392 - pTeX: renumber nodes
@d unset_node=13 {|type| for an unset node}
@y
@d unset_node=15 {|type| for an unset node}
@z

@x [10.160] l.3397 - pTeX: renumber nodes
@ In fact, there are still more types coming. When we get to math formula
processing we will see that a |style_node| has |type=14|; and a number
of larger type codes will also be defined, for use in math mode only.
@y
@ In fact, there are still more types coming. When we get to math formula
processing we will see that a |style_node| has |type=16|; and a number
of larger type codes will also be defined, for use in math mode only.
@z

@x [12.174] l.3662 - pTeX: print KANJI
      print_ASCII(qo(character(p)));
@y
      if font_dir[font(p)]<>dir_default then
        begin p:=link(p); print_kanji(info(p));
        end
      else print_ASCII(qo(character(p)));
@z

@x [12.175] l.3672 - pTeX: Print a short indication of dir_nodes.
hlist_node,vlist_node,ins_node,whatsit_node,mark_node,adjust_node,
  unset_node: print("[]");
@y
hlist_node,vlist_node,dir_node,ins_node,whatsit_node,
  mark_node,adjust_node,unset_node: print("[]");
@z

@x [12.176] l.3698 - pTeX: print KANJI.
  print_char(" "); print_ASCII(qo(character(p)));
@y
  print_char(" ");
  if font_dir[font(p)]<>dir_default then
    begin p:=link(p); print_kanji(info(p));
    end
  else print_ASCII(qo(character(p)));
@z

@x [12.183] l.3815 - pTeX: display char_node and disp_node.
if is_char_node(p) then print_font_and_char(p)
else  case type(p) of
  hlist_node,vlist_node,unset_node: @<Display box |p|@>;
  rule_node: @<Display rule |p|@>;
  ins_node: @<Display insertion |p|@>;
  whatsit_node: @<Display the whatsit node |p|@>;
@y
if is_char_node(p) then
  begin print_font_and_char(p);
  if font_dir[font(p)]<>dir_default then p:=link(p)
  end
else  case type(p) of
  hlist_node,vlist_node,dir_node,unset_node: @<Display box |p|@>;
  rule_node: @<Display rule |p|@>;
  ins_node: @<Display insertion |p|@>;
  whatsit_node: @<Display the whatsit node |p|@>;
  disp_node: begin print_esc("displace "); print_scaled(disp_dimen(p));
    end;
@z

@x [12.184] l.3833 - pTeX: display dir_node.
@ @<Display box |p|@>=
begin if type(p)=hlist_node then print_esc("h")
else if type(p)=vlist_node then print_esc("v")
else print_esc("unset");
@y
@ @<Display box |p|@>=
begin case type(p) of
  hlist_node: print_esc("h");
  vlist_node: print_esc("v");
  dir_node: print_esc("dir");
  othercases print_esc("unset")
  endcases@/;
@z
@x [12.184] l.3842 - pTeX: display dir_node.
  if shift_amount(p)<>0 then
    begin print(", shifted "); print_scaled(shift_amount(p));
    end;
@y
  if shift_amount(p)<>0 then
    begin print(", shifted "); print_scaled(shift_amount(p));
    end;
@z
@x [12.184] l.3845 - pTeX: display dir_node.
  end;
@y
  if box_dir(p)<>dir_default then
    begin print(", "); print_direction(box_dir(p));
    end;
  end;
@z

@x [12.188] l.3896 - pTeX: Display insertion and ins_dir.
@ @<Display insertion |p|@>=
begin print_esc("insert"); print_int(qo(subtype(p)));
print(", natural size "); print_scaled(height(p));
@y
@ @<Display insertion |p|@>=
begin print_esc("insert"); print_int(qo(subtype(p)));
print_dir(abs(ins_dir(p)));
print(", natural size "); print_scaled(height(p));
@z

@x [12.194] l.3961 - pTeX: Display penalty usage
@ @<Display penalty |p|@>=
begin print_esc("penalty "); print_int(penalty(p));
end
@y
@ @<Display penalty |p|@>=
begin print_esc("penalty "); print_int(penalty(p));
if subtype(p)=widow_pena then print("(for \jcharwidowpenalty)")
else if subtype(p)=kinsoku_pena then print("(for kinsoku)");
end
@z

@x [13.202] l.4043 - pTeX: dir_node, disp_node
    hlist_node,vlist_node,unset_node: begin flush_node_list(list_ptr(p));
      free_node(p,box_node_size); goto done;
      end;
@y
    hlist_node,vlist_node,dir_node,unset_node:
      begin flush_node_list(list_ptr(p));
      fast_delete_glue_ref(space_ptr(p));
      fast_delete_glue_ref(xspace_ptr(p));
      free_node(p,box_node_size); goto done;
      end;
@z

@x [13.202] l.4056 - pTeX:
    kern_node,math_node,penalty_node: do_nothing;
@y
    disp_node,
    kern_node,math_node,penalty_node: do_nothing;
@z

@x [14.206] l.4121 - pTeX: space_ptr, xspace_ptr, dir_node, disp_node
@ @<Case statement to copy...@>=
@y
@ @<Case statement to copy...@>=
@z
@x [14.206] l.4123
hlist_node,vlist_node,unset_node: begin r:=get_node(box_node_size);
  mem[r+6]:=mem[p+6]; mem[r+5]:=mem[p+5]; {copy the last two words}
@y
dir_node,
hlist_node,vlist_node,unset_node: begin r:=get_node(box_node_size);
  mem[r+7]:=mem[p+7];
  mem[r+6]:=mem[p+6]; mem[r+5]:=mem[p+5]; {copy the last three words}
  add_glue_ref(space_ptr(r)); add_glue_ref(xspace_ptr(r));
@z
@x [14.206] l.4130
ins_node: begin r:=get_node(ins_node_size); mem[r+4]:=mem[p+4];
  add_glue_ref(split_top_ptr(p));
  ins_ptr(r):=copy_node_list(ins_ptr(p)); {this affects |mem[r+4]|}
  words:=ins_node_size-1;
  end;
@y
ins_node: begin r:=get_node(ins_node_size);
  mem[r+5]:=mem[p+5]; mem[r+4]:=mem[p+4];
  add_glue_ref(split_top_ptr(p));
  ins_ptr(r):=copy_node_list(ins_ptr(p)); {this affects |mem[r+4]|}
  words:=ins_node_size-2;
  end;
@z

@x [14.206] l.4140 - pTeX: disp_node
kern_node,math_node,penalty_node: begin r:=get_node(small_node_size);
@y
disp_node,
kern_node,math_node,penalty_node: begin r:=get_node(small_node_size);
@z

@x [15.207] l.4201 - pTeX: Add kanji, kana, other_kchar category codes.
@d max_char_code=15 {largest catcode for individual characters}
@y
@d kanji=16 {kanji}
@d kana=17 {hiragana, katakana, alphabet}
@d other_kchar=18 {kanji codes}
@d max_char_code=18 {largest catcode for individual characters}
@z

@x [15.208] l.4207 - pTeX: Add inhibit_glue, chg_dir.
@d char_num=16 {character specified numerically ( \.{\\char} )}
@d math_char_num=17 {explicit math code ( \.{\\mathchar} )}
@d mark=18 {mark definition ( \.{\\mark} )}
@d xray=19 {peek inside of \TeX\ ( \.{\\show}, \.{\\showbox}, etc.~)}
@d make_box=20 {make a box ( \.{\\box}, \.{\\copy}, \.{\\hbox}, etc.~)}
@d hmove=21 {horizontal motion ( \.{\\moveleft}, \.{\\moveright} )}
@d vmove=22 {vertical motion ( \.{\\raise}, \.{\\lower} )}
@d un_hbox=23 {unglue a box ( \.{\\unhbox}, \.{\\unhcopy} )}
@d un_vbox=24 {unglue a box ( \.{\\unvbox}, \.{\\unvcopy} )}
@y
@d char_num=max_char_code+1 {character specified numerically ( \.{\\char} )}
@d math_char_num=char_num+1 {explicit math code ( \.{\\mathchar} )}
@d mark=math_char_num+1 {mark definition ( \.{\\mark} )}
@d xray=mark+1 {peek inside of \TeX\ ( \.{\\show}, \.{\\showbox}, etc.~)}
@d make_box=xray+1 {make a box ( \.{\\box}, \.{\\copy}, \.{\\hbox}, etc.~)}
@d hmove=make_box+1 {horizontal motion ( \.{\\moveleft}, \.{\\moveright} )}
@d vmove=hmove+1 {vertical motion ( \.{\\raise}, \.{\\lower} )}
@d un_hbox=vmove+1 {unglue a box ( \.{\\unhbox}, \.{\\unhcopy} )}
@d un_vbox=un_hbox+1 {unglue a box ( \.{\\unvbox}, \.{\\unvcopy} )}
@z
@x [15.208] l.4207 - pTeX: Add inhibit_glue, chg_dir.
@d remove_item=25 {nullify last item ( \.{\\unpenalty},
  \.{\\unkern}, \.{\\unskip} )}
@d hskip=26 {horizontal glue ( \.{\\hskip}, \.{\\hfil}, etc.~)}
@d vskip=27 {vertical glue ( \.{\\vskip}, \.{\\vfil}, etc.~)}
@d mskip=28 {math glue ( \.{\\mskip} )}
@d kern=29 {fixed space ( \.{\\kern})}
@d mkern=30 {math kern ( \.{\\mkern} )}
@d leader_ship=31 {use a box ( \.{\\shipout}, \.{\\leaders}, etc.~)}
@d halign=32 {horizontal table alignment ( \.{\\halign} )}
@d valign=33 {vertical table alignment ( \.{\\valign} )}
@y
@d remove_item=un_vbox+1 {nullify last item ( \.{\\unpenalty},
  \.{\\unkern}, \.{\\unskip} )}
@d hskip=remove_item+1 {horizontal glue ( \.{\\hskip}, \.{\\hfil}, etc.~)}
@d vskip=hskip+1 {vertical glue ( \.{\\vskip}, \.{\\vfil}, etc.~)}
@d mskip=vskip+1 {math glue ( \.{\\mskip} )}
@d kern=mskip+1 {fixed space ( \.{\\kern})}
@d mkern=kern+1 {math kern ( \.{\\mkern} )}
@d leader_ship=mkern+1 {use a box ( \.{\\shipout}, \.{\\leaders}, etc.~)}
@d halign=leader_ship+1 {horizontal table alignment ( \.{\\halign} )}
@d valign=halign+1 {vertical table alignment ( \.{\\valign} )}
@z
@x [15.208] l.4207 - pTeX: Add inhibit_glue, chg_dir.
@d no_align=34 {temporary escape from alignment ( \.{\\noalign} )}
@d vrule=35 {vertical rule ( \.{\\vrule} )}
@d hrule=36 {horizontal rule ( \.{\\hrule} )}
@d insert=37 {vlist inserted in box ( \.{\\insert} )}
@d vadjust=38 {vlist inserted in enclosing paragraph ( \.{\\vadjust} )}
@d ignore_spaces=39 {gobble |spacer| tokens ( \.{\\ignorespaces} )}
@d after_assignment=40 {save till assignment is done ( \.{\\afterassignment} )}
@d after_group=41 {save till group is done ( \.{\\aftergroup} )}
@d break_penalty=42 {additional badness ( \.{\\penalty} )}
@d start_par=43 {begin paragraph ( \.{\\indent}, \.{\\noindent} )}
@d ital_corr=44 {italic correction ( \.{\\/} )}
@d accent=45 {attach accent in text ( \.{\\accent} )}
@d math_accent=46 {attach accent in math ( \.{\\mathaccent} )}
@d discretionary=47 {discretionary texts ( \.{\\-}, \.{\\discretionary} )}
@d eq_no=48 {equation number ( \.{\\eqno}, \.{\\leqno} )}
@d left_right=49 {variable delimiter ( \.{\\left}, \.{\\right} )}
@y
@d no_align=valign+1 {temporary escape from alignment ( \.{\\noalign} )}
@d vrule=no_align+1 {vertical rule ( \.{\\vrule} )}
@d hrule=vrule+1 {horizontal rule ( \.{\\hrule} )}
@d insert=hrule+1 {vlist inserted in box ( \.{\\insert} )}
@d vadjust=insert+1 {vlist inserted in enclosing paragraph ( \.{\\vadjust} )}
@d ignore_spaces=vadjust+1 {gobble |spacer| tokens ( \.{\\ignorespaces} )}
@d after_assignment=ignore_spaces+1 {save till assignment is done ( \.{\\afterassignment} )}
@d after_group=after_assignment+1 {save till group is done ( \.{\\aftergroup} )}
@d break_penalty=after_group+1 {additional badness ( \.{\\penalty} )}
@d start_par=break_penalty+1 {begin paragraph ( \.{\\indent}, \.{\\noindent} )}
@d ital_corr=start_par+1 {italic correction ( \.{\\/} )}
@d accent=ital_corr+1 {attach accent in text ( \.{\\accent} )}
@d math_accent=accent+1 {attach accent in math ( \.{\\mathaccent} )}
@d discretionary=math_accent+1 {discretionary texts ( \.{\\-}, \.{\\discretionary} )}
@d eq_no=discretionary+1 {equation number ( \.{\\eqno}, \.{\\leqno} )}
@d left_right=eq_no+1 {variable delimiter ( \.{\\left}, \.{\\right} )}
@z
@x [15.208] l.4207 - pTeX: Add inhibit_glue, chg_dir.
@d math_comp=50 {component of formula ( \.{\\mathbin}, etc.~)}
@d limit_switch=51 {diddle limit conventions ( \.{\\displaylimits}, etc.~)}
@d above=52 {generalized fraction ( \.{\\above}, \.{\\atop}, etc.~)}
@d math_style=53 {style specification ( \.{\\displaystyle}, etc.~)}
@d math_choice=54 {choice specification ( \.{\\mathchoice} )}
@d non_script=55 {conditional math glue ( \.{\\nonscript} )}
@d vcenter=56 {vertically center a vbox ( \.{\\vcenter} )}
@d case_shift=57 {force specific case ( \.{\\lowercase}, \.{\\uppercase}~)}
@d message=58 {send to user ( \.{\\message}, \.{\\errmessage} )}
@d extension=59 {extensions to \TeX\ ( \.{\\write}, \.{\\special}, etc.~)}
@d in_stream=60 {files for reading ( \.{\\openin}, \.{\\closein} )}
@d begin_group=61 {begin local grouping ( \.{\\begingroup} )}
@d end_group=62 {end local grouping ( \.{\\endgroup} )}
@d omit=63 {omit alignment template ( \.{\\omit} )}
@d ex_space=64 {explicit space ( \.{\\\ } )}
@d no_boundary=65 {suppress boundary ligatures ( \.{\\noboundary} )}
@d radical=66 {square root and similar signs ( \.{\\radical} )}
@d end_cs_name=67 {end control sequence ( \.{\\endcsname} )}
@d min_internal=68 {the smallest code that can follow \.{\\the}}
@d char_given=68 {character code defined by \.{\\chardef}}
@d math_given=69 {math code defined by \.{\\mathchardef}}
@d last_item=70 {most recent item ( \.{\\lastpenalty},
  \.{\\lastkern}, \.{\\lastskip} )}
@d max_non_prefixed_command=70 {largest command code that can't be \.{\\global}}
@y
@d math_comp=left_right+1 {component of formula ( \.{\\mathbin}, etc.~)}
@d limit_switch=math_comp+1 {diddle limit conventions ( \.{\\displaylimits}, etc.~)}
@d above=limit_switch+1 {generalized fraction ( \.{\\above}, \.{\\atop}, etc.~)}
@d math_style=above+1 {style specification ( \.{\\displaystyle}, etc.~)}
@d math_choice=math_style+1 {choice specification ( \.{\\mathchoice} )}
@d non_script=math_choice+1 {conditional math glue ( \.{\\nonscript} )}
@d vcenter=non_script+1 {vertically center a vbox ( \.{\\vcenter} )}
@d case_shift=vcenter+1 {force specific case ( \.{\\lowercase}, \.{\\uppercase}~)}
@d message=case_shift+1 {send to user ( \.{\\message}, \.{\\errmessage} )}
@d extension=message+1 {extensions to \TeX\ ( \.{\\write}, \.{\\special}, etc.~)}
@d in_stream=extension+1 {files for reading ( \.{\\openin}, \.{\\closein} )}
@d begin_group=in_stream+1 {begin local grouping ( \.{\\begingroup} )}
@d end_group=begin_group+1 {end local grouping ( \.{\\endgroup} )}
@d omit=end_group+1 {omit alignment template ( \.{\\omit} )}
@d ex_space=omit+1 {explicit space ( \.{\\\ } )}
@d no_boundary=ex_space+1 {suppress boundary ligatures ( \.{\\noboundary} )}
@d radical=no_boundary+1 {square root and similar signs ( \.{\\radical} )}
@d end_cs_name=radical+1 {end control sequence ( \.{\\endcsname} )}
@d min_internal=end_cs_name+1 {the smallest code that can follow \.{\\the}}
@d char_given=min_internal {character code defined by \.{\\chardef}}
@d math_given=char_given+1 {math code defined by \.{\\mathchardef}}
@d last_item=math_given+1 {most recent item ( \.{\\lastpenalty},
  \.{\\lastkern}, \.{\\lastskip} )}
@d inhibit_glue=last_item+1 {inhibit adjust glue ( \.{\\inhibitglue} )}
@d chg_dir=inhibit_glue+1 {change dir mode by \.{\\tate}, \.{\\yoko}}
@d max_non_prefixed_command=chg_dir {largest command code that can't be \.{\\global}}
@z

@x [15.209] l.4272 - pTeX: def_jfont, def_tfont, set_auto_spacing
@d toks_register=71 {token list register ( \.{\\toks} )}
@d assign_toks=72 {special token list ( \.{\\output}, \.{\\everypar}, etc.~)}
@d assign_int=73 {user-defined integer ( \.{\\tolerance}, \.{\\day}, etc.~)}
@d assign_dimen=74 {user-defined length ( \.{\\hsize}, etc.~)}
@d assign_glue=75 {user-defined glue ( \.{\\baselineskip}, etc.~)}
@d assign_mu_glue=76 {user-defined muglue ( \.{\\thinmuskip}, etc.~)}
@d assign_font_dimen=77 {user-defined font dimension ( \.{\\fontdimen} )}
@d assign_font_int=78 {user-defined font integer ( \.{\\hyphenchar},
  \.{\\skewchar} )}
@d set_aux=79 {specify state info ( \.{\\spacefactor}, \.{\\prevdepth} )}
@d set_prev_graf=80 {specify state info ( \.{\\prevgraf} )}
@d set_page_dimen=81 {specify state info ( \.{\\pagegoal}, etc.~)}
@d set_page_int=82 {specify state info ( \.{\\deadcycles},
@y
@d toks_register=max_non_prefixed_command+1 {token list register ( \.{\\toks} )}
@d assign_toks=toks_register+1
  {special token list ( \.{\\output}, \.{\\everypar}, etc.~)}
@d assign_int=assign_toks+1
  {user-defined integer ( \.{\\tolerance}, \.{\\day}, etc.~)}
@d assign_dimen=assign_int+1 {user-defined length ( \.{\\hsize}, etc.~)}
@d assign_glue=assign_dimen+1 {user-defined glue ( \.{\\baselineskip}, etc.~)}
@d assign_mu_glue=assign_glue+1 {user-defined muglue ( \.{\\thinmuskip}, etc.~)}
@d assign_font_dimen=assign_mu_glue+1
  {user-defined font dimension ( \.{\\fontdimen} )}
@d assign_font_int=assign_font_dimen+1
  {user-defined font integer ( \.{\\hyphenchar}, \.{\\skewchar} )}
@d assign_kinsoku=assign_font_int+1
  {user-defined kinsoku character ( \.{\\prebreakpenalty},
   \.{\\postbreakpenalty} )}
@d assign_inhibit_xsp_code=assign_kinsoku+1
  {user-defined inhibit xsp character ( \.{\\inhibitxspcode} )}
@d set_kansuji_char=assign_inhibit_xsp_code+1
  {user-defined kansuji character ( \.{\\kansujichar} )}
@d set_aux=set_kansuji_char+1
  {specify state info ( \.{\\spacefactor}, \.{\\prevdepth} )}
@d set_prev_graf=set_aux+1 {specify state info ( \.{\\prevgraf} )}
@d set_page_dimen=set_prev_graf+1 {specify state info ( \.{\\pagegoal}, etc.~)}
@d set_page_int=set_page_dimen+1 {specify state info ( \.{\\deadcycles},
@z
@x [15.209] l.4272 - pTeX: def_jfont, def_tfont, set_auto_spacing
@d set_box_dimen=83 {change dimension of box ( \.{\\wd}, \.{\\ht}, \.{\\dp} )}
@d set_shape=84 {specify fancy paragraph shape ( \.{\\parshape} )}
@y
@d set_box_dimen=set_page_int+1 {change dimension of box ( \.{\\wd}, \.{\\ht}, \.{\\dp} )}
@d set_shape=set_box_dimen+1 {specify fancy paragraph shape ( \.{\\parshape} )}
@z
@x [15.209] l.4272 - pTeX: def_jfont, def_tfont, set_auto_spacing
@d def_code=85 {define a character code ( \.{\\catcode}, etc.~)}
@d def_family=86 {declare math fonts ( \.{\\textfont}, etc.~)}
@d set_font=87 {set current font ( font identifiers )}
@d def_font=88 {define a font file ( \.{\\font} )}
@d register=89 {internal register ( \.{\\count}, \.{\\dimen}, etc.~)}
@d max_internal=89 {the largest code that can follow \.{\\the}}
@d advance=90 {advance a register or parameter ( \.{\\advance} )}
@d multiply=91 {multiply a register or parameter ( \.{\\multiply} )}
@d divide=92 {divide a register or parameter ( \.{\\divide} )}
@d prefix=93 {qualify a definition ( \.{\\global}, \.{\\long}, \.{\\outer} )}
@y
@d def_code=set_shape+1 {define a character code ( \.{\\catcode}, etc.~)}
@d def_family=def_code+1 {declare math fonts ( \.{\\textfont}, etc.~)}
@d set_font=def_family+1 {set current font ( font identifiers )}
@d def_font=set_font+1 {define a font file ( \.{\\font} )}
@d def_jfont=def_font+1 {define a font file ( \.{\\jfont} )}
@d def_tfont=def_jfont+1 {define a font file ( \.{\\tfont} )}
@d register=def_tfont+1 {internal register ( \.{\\count}, \.{\\dimen}, etc.~)}
@d max_internal=register {the largest code that can follow \.{\\the}}
@d advance=max_internal+1 {advance a register or parameter ( \.{\\advance} )}
@d multiply=advance+1 {multiply a register or parameter ( \.{\\multiply} )}
@d divide=multiply+1 {divide a register or parameter ( \.{\\divide} )}
@d prefix=divide+1 {qualify a definition ( \.{\\global}, \.{\\long}, \.{\\outer} )}
@z
@x [15.209] l.4272 - pTeX: def_jfont, def_tfont, set_auto_spacing
@d let=94 {assign a command code ( \.{\\let}, \.{\\futurelet} )}
@d shorthand_def=95 {code definition ( \.{\\chardef}, \.{\\countdef}, etc.~)}
  {or \.{\\charsubdef}}
@d read_to_cs=96 {read into a control sequence ( \.{\\read} )}
@y
@d let=prefix+1 {assign a command code ( \.{\\let}, \.{\\futurelet} )}
@d shorthand_def=let+1 {code definition ( \.{\\chardef}, \.{\\countdef}, etc.~)}
  {or \.{\\charsubdef}}
@d read_to_cs=shorthand_def+1 {read into a control sequence ( \.{\\read} )}
@z
@x [15.209] l.4272 - pTeX: def_jfont, def_tfont, set_auto_spacing
@d def=97 {macro definition ( \.{\\def}, \.{\\gdef}, \.{\\xdef}, \.{\\edef} )}
@d set_box=98 {set a box ( \.{\\setbox} )}
@d hyph_data=99 {hyphenation data ( \.{\\hyphenation}, \.{\\patterns} )}
@d set_interaction=100 {define level of interaction ( \.{\\batchmode}, etc.~)}
@d max_command=100 {the largest command code seen at |big_switch|}
@y
@d def=read_to_cs+1 {macro definition ( \.{\\def}, \.{\\gdef}, \.{\\xdef}, \.{\\edef} )}
@d set_box=def+1 {set a box ( \.{\\setbox} )}
@d hyph_data=set_box+1 {hyphenation data ( \.{\\hyphenation}, \.{\\patterns} )}
@d set_interaction=hyph_data+1 {define level of interaction ( \.{\\batchmode}, etc.~)}
@d set_auto_spacing=set_interaction+1 {set auto spacing mode
  ( \.{\\autospacing}, \.{\\noautospacing}, ( \.{\\autoxspacing}, \.{\\noautoxspacing} )}
@d max_command=set_auto_spacing {the largest command code seen at |big_switch|}
@z

@x [16.212] l.4437 - pTeX: last_jchr, direction, adjust direction
@<Types...@>=
@!list_state_record=record@!mode_field:-mmode..mmode;@+
  @!head_field,@!tail_field: pointer;
@y
@<Types...@>=
@!list_state_record=record@!mode_field:-mmode..mmode;@+
  @!dir_field,@!adj_dir_field: -dir_yoko..dir_yoko;
  @!pdisp_field: scaled;
  @!head_field,@!tail_field,@!pnode_field,@!last_jchr_field: pointer;
  @!disp_called_field: boolean;
  @!inhibit_glue_flag_field: integer;
@z

@x [16.213] l.4445 - pTeX: last_jchr, direction, adjust_dir, prev_{node,disp}
@d head==cur_list.head_field {header node of current list}
@d tail==cur_list.tail_field {final node on current list}
@y
@d direction==cur_list.dir_field {current direction}
@d adjust_dir==cur_list.adj_dir_field {current adjust direction}
@d head==cur_list.head_field {header node of current list}
@d tail==cur_list.tail_field {final node on current list}
@d prev_node==cur_list.pnode_field {previous to last |disp_node|}
@d prev_disp==cur_list.pdisp_field {displacemant at |prev_node|}
@d last_jchr==cur_list.last_jchr_field {final jchar node on current list}
@d disp_called==cur_list.disp_called_field {is a |disp_node| present in the current list?}
@d inhibit_glue_flag==cur_list.inhibit_glue_flag_field {is \.{inhibitglue} is specified at the current list?}
@z

@x [16.214] l.4464 - pTeX: prev_append: disp_node
@d tail_append(#)==begin link(tail):=#; tail:=link(tail);
  end
@y
@d tail_append(#)==begin link(tail):=#; tail:=link(tail);
  end
@d prev_append(#)==begin link(prev_node):=#;
  link(link(prev_node)):=tail; prev_node:=link(prev_node);
  end
@z

@x [16.215] l.4477 - pTeX: last_jchr, direction, adjust_dir, prev_node
mode:=vmode; head:=contrib_head; tail:=contrib_head;
@y
mode:=vmode; head:=contrib_head; tail:=contrib_head; prev_node:=tail;
direction:=dir_yoko; adjust_dir:=direction; prev_disp:=0; last_jchr:=null;
disp_called:=false;
@z

@x [16.216] l.4496 - pTeX: last_jchr, displacement.
incr(nest_ptr); head:=get_avail; tail:=head; prev_graf:=0; mode_line:=line;
@y
incr(nest_ptr); head:=new_null_box; tail:=head; prev_node:=tail;
prev_graf:=0; prev_disp:=0; disp_called:=false; last_jchr:=null; mode_line:=line;
@z

@x [16.217] l.4504 - pTeX: pop_nest last_jchr
@p procedure pop_nest; {leave a semantic level, re-enter the old}
begin free_avail(head); decr(nest_ptr); cur_list:=nest[nest_ptr];
end;
@y
@p procedure pop_nest; {leave a semantic level, re-enter the old}
begin
fast_delete_glue_ref(space_ptr(head)); fast_delete_glue_ref(xspace_ptr(head));
free_node(head,box_node_size); decr(nest_ptr); cur_list:=nest[nest_ptr];
end;
@z

@x [16.218] l.4521 - pTeX: show_activities : direction
  print_nl("### "); print_mode(m);
@y
  print_nl("### "); print_direction(nest[p].dir_field);
  print(", "); print_mode(m);
@z

@x [17.224] l.4711 - pTeX: kanji_skip_code xkanji_skip_code, jfm_skip
@d thin_mu_skip_code=15 {thin space in math formula}
@d med_mu_skip_code=16 {medium space in math formula}
@d thick_mu_skip_code=17 {thick space in math formula}
@d glue_pars=18 {total number of glue parameters}
@y
@d kanji_skip_code=15 {between kanji-kanji space}
@d xkanji_skip_code=16 {between latin-kanji or kanji-latin space}
@d thin_mu_skip_code=17 {thin space in math formula}
@d med_mu_skip_code=18 {medium space in math formula}
@d thick_mu_skip_code=19 {thick space in math formula}
@d jfm_skip=20 {space refer from JFM}
@d glue_pars=21 {total number of glue parameters}
@z

@x [17.224] l.4739 - kanji_skip, xkanji_skip
@d thick_mu_skip==glue_par(thick_mu_skip_code)
@y
@d thick_mu_skip==glue_par(thick_mu_skip_code)
@d kanji_skip==glue_par(kanji_skip_code)
@d xkanji_skip==glue_par(xkanji_skip_code)
@z

@x [17.225] l.4767 - pTeX: kanji_skip_code xkanji_skip_code
thick_mu_skip_code: print_esc("thickmuskip");
othercases print("[unknown glue parameter!]")
@y
thick_mu_skip_code: print_esc("thickmuskip");
kanji_skip_code: print_esc("kanjiskip");
xkanji_skip_code: print_esc("xkanjiskip");
jfm_skip: print("refer from jfm");
othercases print("[unknown glue parameter!]")
@z

@x [17.226] l.4813 - pTeX: kanji_skip_code xkanji_skip_code
primitive("thickmuskip",assign_mu_glue,glue_base+thick_mu_skip_code);@/
@!@:thick_mu_skip_}{\.{\\thickmuskip} primitive@>
@y
primitive("thickmuskip",assign_mu_glue,glue_base+thick_mu_skip_code);@/
@!@:thick_mu_skip_}{\.{\\thickmuskip} primitive@>
primitive("kanjiskip",assign_glue,glue_base+kanji_skip_code);@/
@!@:kanji_skip_}{\.{\\kanjiskip} primitive@>
primitive("xkanjiskip",assign_glue,glue_base+xkanji_skip_code);@/
@!@:xkanji_skip_}{\.{\\xkanjiskip} primitive@>
@z

@x [17.230] l.4867 - pTeX: cat_code_size, cur_jfont_loc, auto_spacing, auto_xspacing, inhibit_xsp_code, cur_tfont_loc
@d math_font_base=cur_font_loc+1 {table of 48 math font numbers}
@d cat_code_base=math_font_base+48
  {table of 256 command codes (the ``catcodes'')}
@d lc_code_base=cat_code_base+256 {table of 256 lowercase mappings}
@y
@d math_font_base=cur_font_loc+1 {table of 48 math font numbers}
@d cur_jfont_loc=math_font_base+48
@d cur_tfont_loc=cur_jfont_loc+1
@d auto_spacing_code=cur_tfont_loc+1
@d auto_xspacing_code=auto_spacing_code+1
@d cat_code_base=auto_xspacing_code+1
  {table of 256 command codes (the ``catcodes'')}
@d kcat_code_base=cat_code_base+256
  {table of 256 command codes for the wchar's catcodes }
@d auto_xsp_code_base=kcat_code_base+256 {table of 256 auto spacer flag}
@d inhibit_xsp_code_base=auto_xsp_code_base+256
@d kinsoku_base=inhibit_xsp_code_base+256 {table of 256 kinsoku mappings}
@d kansuji_base=kinsoku_base+256 {table of 10 kansuji mappings}
@d lc_code_base=kansuji_base+10 {table of 256 lowercase mappings}
@z

@x [17.230] l.4900 - pTeX:
@d char_sub_code(#)==equiv(char_sub_code_base+#)
  {Note: |char_sub_code(c)| is the true substitution info plus |min_halfword|}
@y
@d char_sub_code(#)==equiv(char_sub_code_base+#)
  {Note: |char_sub_code(c)| is the true substitution info plus |min_halfword|}
@#
@d cur_jfont==equiv(cur_jfont_loc) {pTeX: }
@d cur_tfont==equiv(cur_tfont_loc)
@d auto_spacing==equiv(auto_spacing_code)
@d auto_xspacing==equiv(auto_xspacing_code)
@d kcat_code(#)==equiv(kcat_code_base+#)
@d auto_xsp_code(#)==equiv(auto_xsp_code_base+#)
@d inhibit_xsp_type(#)==eq_type(inhibit_xsp_code_base+#)
@d inhibit_xsp_code(#)==equiv(inhibit_xsp_code_base+#)
@d kinsoku_type(#)==eq_type(kinsoku_base+#)
@d kinsoku_code(#)==equiv(kinsoku_base+#)
@d kansuji_char(#)==equiv(kansuji_base+#)
@z

@x [17.232] l.4959 - pTeX: initialize cat_code, cur_jfont, cur_tfont
cur_font:=null_font; eq_type(cur_font_loc):=data;
eq_level(cur_font_loc):=level_one;@/
@y
cur_font:=null_font; eq_type(cur_font_loc):=data;
eq_level(cur_font_loc):=level_one;@/
cur_jfont:=null_font; eq_type(cur_jfont_loc):=data;
eq_level(cur_jfont_loc):=level_one;@/
cur_tfont:=null_font; eq_type(cur_tfont_loc):=data;
eq_level(cur_tfont_loc):=level_one;@/
@z

@x [17.232] l.4965 - pTeX: initialize cat_code, cur_jfont, cur_tfont
for k:=0 to 255 do
  begin cat_code(k):=other_char; math_code(k):=hi(k); sf_code(k):=1000;
  end;
@y
eqtb[auto_spacing_code]:=eqtb[cat_code_base];
eqtb[auto_xspacing_code]:=eqtb[cat_code_base];
for k:=0 to 255 do
  begin cat_code(k):=other_char; kcat_code(k):=other_kchar;
  math_code(k):=hi(k); sf_code(k):=1000;
  auto_xsp_code(k):=0; inhibit_xsp_code(k):=0; inhibit_xsp_type(k):=0;
  kinsoku_code(k):=0; kinsoku_type(k):=0;
  end;
@z
@x [17.232] l.4971 - pTeX: initialize cat_code, cur_jfont, cur_tfont
for k:="0" to "9" do math_code(k):=hi(k+var_code);
for k:="A" to "Z" do
  begin cat_code(k):=letter; cat_code(k+"a"-"A"):=letter;@/
  math_code(k):=hi(k+var_code+@"100);
  math_code(k+"a"-"A"):=hi(k+"a"-"A"+var_code+@"100);@/
  lc_code(k):=k+"a"-"A"; lc_code(k+"a"-"A"):=k+"a"-"A";@/
  uc_code(k):=k; uc_code(k+"a"-"A"):=k;@/
  sf_code(k):=999;
  end;
@y
for k:="0" to "9" do
  begin math_code(k):=hi(k+var_code);
  auto_xsp_code(k):=3;
  end;
kansuji_char(0):=toDVI(fromJIS(@"213B));
kansuji_char(1):=toDVI(fromJIS(@"306C));
kansuji_char(2):=toDVI(fromJIS(@"4673));
kansuji_char(3):=toDVI(fromJIS(@"3B30));
kansuji_char(4):=toDVI(fromJIS(@"3B4D));
kansuji_char(5):=toDVI(fromJIS(@"385E));
kansuji_char(6):=toDVI(fromJIS(@"4F3B));
kansuji_char(7):=toDVI(fromJIS(@"3C37));
kansuji_char(8):=toDVI(fromJIS(@"482C));
kansuji_char(9):=toDVI(fromJIS(@"3665));
for k:="A" to "Z" do
  begin cat_code(k):=letter; cat_code(k+"a"-"A"):=letter;@/
  math_code(k):=hi(k+var_code+@"100);
  math_code(k+"a"-"A"):=hi(k+"a"-"A"+var_code+@"100);@/
  lc_code(k):=k+"a"-"A"; lc_code(k+"a"-"A"):=k+"a"-"A";@/
  uc_code(k):=k; uc_code(k+"a"-"A"):=k;@/
  auto_xsp_code(k):=3; auto_xsp_code(k+"a"-"A"):=3;@/
  sf_code(k):=999;
  end;
@t\hskip10pt@>kcat_code(@"20+1):=other_kchar; {1 ku}
@t\hskip10pt@>kcat_code(@"20+2):=other_kchar; {2 ku}
@+@t\1@>for k:=3 to 6 do kcat_code(@"20+k):=kana; {3 ku ... 6 ku}
@+@t\1@>for k:=7 to 8 do kcat_code(@"20+k):=other_kchar; {7 ku ... 8 ku}
@+@t\1@>for k:=16 to 84 do kcat_code(@"20+k):=kanji; {16 ku ... 84 ku}
{ $\.{@@"20}+|k| = |kcatcodekey|(|fromKUTEN|(|HILO|(k,1))$ }
@z

@x
@ @<Show the halfword code in |eqtb[n]|@>=
if n<math_code_base then
  begin if n<lc_code_base then
    begin print_esc("catcode"); print_int(n-cat_code_base);
    end
@y
@ @<Show the halfword code in |eqtb[n]|@>=
if n<math_code_base then
  begin if n<kcat_code_base then
    begin print_esc("catcode"); print_int(n-cat_code_base);
    end
  else if n<auto_xsp_code_base then
    begin print_esc("kcatcode"); print_int(n-kcat_code_base);
    end
  else if n<inhibit_xsp_code_base then
    begin print_esc("xspcode"); print_int(n-auto_xsp_code_base);
    end
  else if n<kinsoku_base then
    begin print("(inhibitxspcode table) "); print_int(n-inhibit_xsp_code_base);
    end
  else if n<kansuji_base then
    begin print("(kinsoku table) "); print_int(n-kinsoku_base);
    end
  else if n<lc_code_base then
    begin print_esc("kansujichar"); print_int(n-kansuji_base);
    end
@z

@x [17.236] l.5092 - pTeX: cur_jfam_code, jchr_widow_penalty
@d cur_fam_code=44 {current family}
@d escape_char_code=45 {escape character for token output}
@d default_hyphen_char_code=46 {value of \.{\\hyphenchar} when a font is loaded}
@d default_skew_char_code=47 {value of \.{\\skewchar} when a font is loaded}
@d end_line_char_code=48 {character placed at the right end of the buffer}
@d new_line_char_code=49 {character that prints as |print_ln|}
@d language_code=50 {current hyphenation table}
@d left_hyphen_min_code=51 {minimum left hyphenation fragment size}
@d right_hyphen_min_code=52 {minimum right hyphenation fragment size}
@d holding_inserts_code=53 {do not remove insertion nodes from \.{\\box255}}
@d error_context_lines_code=54 {maximum intermediate line pairs shown}
@d tex_int_pars=55 {total number of \TeX's integer parameters}
@#
@d web2c_int_base=tex_int_pars {base for web2c's integer parameters}
@d char_sub_def_min_code=web2c_int_base {smallest value in the charsubdef list}
@d char_sub_def_max_code=web2c_int_base+1 {largest value in the charsubdef list}
@d tracing_char_sub_def_code=web2c_int_base+2 {traces changes to a charsubdef def}
@d web2c_int_pars=web2c_int_base+3 {total number of web2c's integer parameters}
@#
@d int_pars=web2c_int_pars {total number of integer parameters}
@d count_base=int_base+int_pars {256 user \.{\\count} registers}
@y
@d cur_fam_code=44 {current family}
@d cur_jfam_code=45 {current kanji family}
@d escape_char_code=46 {escape character for token output}
@d default_hyphen_char_code=47 {value of \.{\\hyphenchar} when a font is loaded}
@d default_skew_char_code=48 {value of \.{\\skewchar} when a font is loaded}
@d end_line_char_code=49 {character placed at the right end of the buffer}
@d new_line_char_code=50 {character that prints as |print_ln|}
@d language_code=51 {current hyphenation table}
@d left_hyphen_min_code=52 {minimum left hyphenation fragment size}
@d right_hyphen_min_code=53 {minimum right hyphenation fragment size}
@d holding_inserts_code=54 {do not remove insertion nodes from \.{\\box255}}
@d error_context_lines_code=55 {maximum intermediate line pairs shown}
@d jchr_widow_penalty_code=56
			{penalty for creating a widow KANJI character line}
@d text_baseline_shift_factor_code=57
@d script_baseline_shift_factor_code=58
@d scriptscript_baseline_shift_factor_code=59
@d char_sub_def_min_code=60 {smallest value in the charsubdef list}
@d char_sub_def_max_code=61 {largest value in the charsubdef list}
@d tracing_char_sub_def_code=62 {traces changes to a charsubdef def}
@d int_pars=63 {total number of integer parameters}
@d count_base=int_base+int_pars {256 user \.{\\count} registers}
@z

@x [17.236] l.5167 - pTeX: cur_jfam, |jchr_widow_penalty|
@d cur_fam==int_par(cur_fam_code)
@d escape_char==int_par(escape_char_code)
@y
@d cur_fam==int_par(cur_fam_code)
@d cur_jfam==int_par(cur_jfam_code)
@d escape_char==int_par(escape_char_code)
@d jchr_widow_penalty==int_par(jchr_widow_penalty_code)
@d text_baseline_shift_factor==int_par(text_baseline_shift_factor_code)
@d script_baseline_shift_factor==int_par(script_baseline_shift_factor_code)
@d scriptscript_baseline_shift_factor==int_par(scriptscript_baseline_shift_factor_code)
@z

@x [17.237] l.5244 - pTeX: cur_jfam_code, jchr_window_penalty_code
new_line_char_code:print_esc("newlinechar");
@y
new_line_char_code:print_esc("newlinechar");
cur_jfam_code:print_esc("jfam");
jchr_widow_penalty_code:print_esc("jcharwidowpenalty");
text_baseline_shift_factor_code:print_esc("textbaselineshiftfactor");
script_baseline_shift_factor_code:print_esc("scriptbaselineshiftfactor");
scriptscript_baseline_shift_factor_code:print_esc("scriptscriptbaselineshiftfactor");
@z

@x [17.238] l.5365 - pTeX: cur_jfam_code, jchr_window_penalty_code
primitive("newlinechar",assign_int,int_base+new_line_char_code);@/
@!@:new_line_char_}{\.{\\newlinechar} primitive@>
@y
primitive("newlinechar",assign_int,int_base+new_line_char_code);@/
@!@:new_line_char_}{\.{\\newlinechar} primitive@>
primitive("jfam",assign_int,int_base+cur_jfam_code);@/
@!@:cur_jfam_}{\.{\\jfam} primitive@>
primitive("jcharwidowpenalty",assign_int,int_base+jchr_widow_penalty_code);@/
@!@:jchr_widow_penalty}{\.{\\jcharwidowpenalty} primitive@>
primitive("textbaselineshiftfactor",assign_int,int_base+text_baseline_shift_factor_code);@/
@!@:text_baseline_shift_factor}{\.{\\textbaselineshiftfactor} primitive@>
primitive("scriptbaselineshiftfactor",assign_int,int_base+script_baseline_shift_factor_code);@/
@!@:script_baseline_shift_factor}{\.{\\scriptbaselineshiftfactor} primitive@>
primitive("scriptscriptbaselineshiftfactor",assign_int,int_base+scriptscript_baseline_shift_factor_code);@/
@!@:scriptscript_baseline_shift_factor}{\.{\\scriptscriptbaselineshiftfactor} primitive@>
@z

@x [17.247] l.5490 - pTeX: kinsoku, t_baseline_shift, y_baseline_shift
@d h_offset_code=18 {amount of horizontal offset when shipping pages out}
@d v_offset_code=19 {amount of vertical offset when shipping pages out}
@d emergency_stretch_code=20 {reduces badnesses on final pass of line-breaking}
@d dimen_pars=21 {total number of dimension parameters}
@d scaled_base=dimen_base+dimen_pars
  {table of 256 user-defined \.{\\dimen} registers}
@d eqtb_size=scaled_base+255 {largest subscript of |eqtb|}
@y
@d h_offset_code=18 {amount of horizontal offset when shipping pages out}
@d v_offset_code=19 {amount of vertical offset when shipping pages out}
@d emergency_stretch_code=20 {reduces badnesses on final pass of line-breaking}
@d t_baseline_shift_code=21 {shift amount when mixing TATE-kumi and Alphabet}
@d y_baseline_shift_code=22 {shift amount when mixing YOKO-kumi and Alphabet}
@d dimen_pars=23 {total number of dimension parameters}
@d scaled_base=dimen_base+dimen_pars
  {table of 256 user-defined \.{\\dimen} registers}
@d kinsoku_penalty_base=scaled_base+256 {table of 256 kinsoku registers}
@d eqtb_size=kinsoku_penalty_base+255 {largest subscript of |eqtb|}
@z

@x l.5498 - pTeX: kinsoku, t_baseline_shift, y_baseline_shift
@d dimen(#)==eqtb[scaled_base+#].sc
@d dimen_par(#)==eqtb[dimen_base+#].sc {a scaled quantity}
@y
@d dimen(#)==eqtb[scaled_base+#].sc
@d dimen_par(#)==eqtb[dimen_base+#].sc {a scaled quantity}
@d kinsoku_penalty(#)==eqtb[kinsoku_penalty_base+#].int
@z

@x l.5518 - pTeX:
@d h_offset==dimen_par(h_offset_code)
@d v_offset==dimen_par(v_offset_code)
@y
@d h_offset==dimen_par(h_offset_code)
@d v_offset==dimen_par(v_offset_code)
@d t_baseline_shift==dimen_par(t_baseline_shift_code)
@d y_baseline_shift==dimen_par(y_baseline_shift_code)
@z

@x l.5542 - pTeX:
h_offset_code:print_esc("hoffset");
v_offset_code:print_esc("voffset");
emergency_stretch_code:print_esc("emergencystretch");
othercases print("[unknown dimen parameter!]")
@y
h_offset_code:print_esc("hoffset");
v_offset_code:print_esc("voffset");
t_baseline_shift_code:print_esc("tbaselineshift");
y_baseline_shift_code:print_esc("ybaselineshift");
emergency_stretch_code:print_esc("emergencystretch");
othercases print("[unknown dimen parameter!]")
@z

@x [17.248] l.5588 - pTeX: rotate offset
primitive("hoffset",assign_dimen,dimen_base+h_offset_code);@/
@!@:h_offset_}{\.{\\hoffset} primitive@>
primitive("voffset",assign_dimen,dimen_base+v_offset_code);@/
@!@:v_offset_}{\.{\\voffset} primitive@>
@y
primitive("hoffset",assign_dimen,dimen_base+h_offset_code);@/
@!@:h_offset_}{\.{\\hoffset} primitive@>
primitive("voffset",assign_dimen,dimen_base+v_offset_code);@/
@!@:v_offset_}{\.{\\voffset} primitive@>
primitive("tbaselineshift",assign_dimen,dimen_base+t_baseline_shift_code);@/
@!@:t_baseline_shift_}{\.{\\tbaselineshift} primitive@>
primitive("ybaselineshift",assign_dimen,dimen_base+y_baseline_shift_code);@/
@!@:y_baseline_shift_}{\.{\\ybaselineshift} primitive@>
@z

@x [17.252] l.5622 - pTeX: show eqtb
else if n<=eqtb_size then @<Show equivalent |n|, in region 6@>
else print_char("?"); {this can't happen either}
end;
tats
@y
else if n<kinsoku_penalty_base then @<Show equivalent |n|, in region 6@>
else if n<=eqtb_size then print("kinsoku")
else print_char("?"); {this can't happen either}
end;
tats
@z

@x [17.???] l.???? - pTeX multibyte control symbol
procedure print_cs(@!p:integer); {prints a purported control sequence}
@y
procedure print_cs(@!p:integer); {prints a purported control sequence}
var j, l:pool_pointer; @!cat:0..max_char_code;
@z

@x
else  begin print_esc(text(p));
  print_char(" ");
  end;
@y
else  begin l:=text(p);
  print_esc(l); j:=str_start[l]; l:=str_start[l+1];
  if l>j+1 then begin
    if l-j=multistrlen(ustringcast(str_pool), l, j) then
      begin cat:=kcat_code(kcatcodekey(fromBUFF(ustringcast(str_pool), l, j)));
      if (cat<>other_kchar) then print_char(" ");
      end
    else print_char(" "); end
  else print_char(" ");
  end;
@z

@x [18.265] l.5903 - pTeX: \jfont \tfont
primitive("font",def_font,0);@/
@!@:font_}{\.{\\font} primitive@>
@y
primitive("font",def_font,0);@/
@!@:font_}{\.{\\font} primitive@>
primitive("jfont",def_jfont,0);@/
@!@:jfont_}{\.{\\jfont} primitive@>
primitive("tfont",def_tfont,0);@/
@!@:tfont_}{\.{\\tfont} primitive@>
@z

@x [18.266] l.5979 - pTeX: \jfont, \tfont
def_font: print_esc("font");
@y
def_font: print_esc("font");
def_jfont: print_esc("jfont");
def_tfont: print_esc("tfont");
@z

@x [20.289] l.6387 - pTeX: cs_token_flag
@d cs_token_flag==@'7777 {amount added to the |eqtb| location in a
  token that stands for a control sequence; is a multiple of~256, less~1}
@y
@d cs_token_flag==@"FFFF {amount added to the |eqtb| location in a
token that stands for a control sequence; is a multiple of~256, less~1}
@z

@x [20.293] l.6496 - pTeX: show_token_list
@ @<Display token |p|...@>=
if (p<hi_mem_min) or (p>mem_end) then
  begin print_esc("CLOBBERED."); return;
@.CLOBBERED@>
  end;
if info(p)>=cs_token_flag then print_cs(info(p)-cs_token_flag)
else  begin m:=info(p) div @'400; c:=info(p) mod @'400;
  if info(p)<0 then print_esc("BAD.")
@.BAD@>
  else @<Display the token $(|m|,|c|)$@>;
  end
@y
@ @<Display token |p|...@>=
if (p<hi_mem_min) or (p>mem_end) then
  begin print_esc("CLOBBERED."); return;
@.CLOBBERED@>
  end;
if info(p)>=cs_token_flag then print_cs(info(p)-cs_token_flag) {|wchar_token|}
else  begin
  if check_kanji(info(p)) then {|wchar_token|}
    begin m:=kcat_code(kcatcodekey(info(p))); c:=info(p);
    end
  else  begin m:=Hi(info(p)); c:=Lo(info(p));
    end;
  if (m<kanji)and(c>256) then print_esc("BAD.")
@.BAD@>
  else @<Display the token $(|m|,|c|)$@>;
end
@z

@x [20.294] l.6512 - pTeX: show_token_list
@<Display the token ...@>=
case m of
left_brace,right_brace,math_shift,tab_mark,sup_mark,sub_mark,spacer,
  letter,other_char: print(c);
@y
@<Display the token ...@>=
case m of
kanji,kana,other_kchar: print_kanji(KANJI(c));
left_brace,right_brace,math_shift,tab_mark,sup_mark,sub_mark,spacer,
  letter,other_char: print(c);
@z

@x [21.298] l.6632 - pTeX: print KANJI
other_char: chr_cmd("the character ");
@y
other_char: chr_cmd("the character ");
kanji,kana,other_kchar: begin print("kanji character ");
  print_kanji(KANJI(chr_code)); end;
@z

@x [22.303] l.6726 - pTeX: state mid_kanji
1) |state=mid_line| is the normal state.\cr
2) |state=skip_blanks| is like |mid_line|, but blanks are ignored.\cr
3) |state=new_line| is the state at the beginning of a line.\cr}}$$
@y
1) |state=mid_line| is the normal state.\cr
2) |state=mid_kanji| is like |mid_line|, and internal KANJI string.\cr
3) |state=skip_blanks| is like |mid_line|, but blanks are ignored.\cr
4) |state=new_line| is the state at the beginning of a line.\cr}}$$
@z

@x [22.303] l.6736 - pTeX: state mid_kanji
@d mid_line=1 {|state| code when scanning a line of characters}
@d skip_blanks=2+max_char_code {|state| code when ignoring blanks}
@d new_line=3+max_char_code+max_char_code {|state| code at start of line}
@y
@d mid_line=1 {|state| code when scanning a line of characters}
@d mid_kanji=2+max_char_code {|state| code when scanning a line of characters}
@d skip_blanks=3+max_char_code+max_char_code {|state| code when ignoring blanks}
@d new_line=4+max_char_code+max_char_code+max_char_code
   {|state| code at start of line}
@z

@x [22.311] l.6986 - pTeX: label
@p procedure show_context; {prints where the scanner is}
label done;
var old_setting:0..max_selector; {saved |selector| setting}
@y
@p procedure show_context; {prints where the scanner is}
label done, done1;
var old_setting:0..max_selector; {saved |selector| setting}
@!s: pointer; {temporary pointer}
@z

@x [22.316] l.7110 - pTeX: init kcode_pos
@d begin_pseudoprint==
  begin l:=tally; tally:=0; selector:=pseudo;
  trick_count:=1000000;
  end
@y
@d begin_pseudoprint==
  begin l:=tally; tally:=0; selector:=pseudo; kcode_pos:=0;
  trick_count:=1000000;
  end
@z

@x [22.316] l.7114 - pTeX: kcode_pos
@d set_trick_count==
  begin first_count:=tally;
  trick_count:=tally+1+error_line-half_error_line;
  if trick_count<error_line then trick_count:=error_line;
  end
@y
@d set_trick_count==
  begin first_count:=tally;
  if (first_count>0)and(trick_buf2[(first_count-1)mod error_line]=1) then
      incr(first_count);
  trick_count:=first_count+1+error_line-half_error_line;
  if trick_count<error_line then trick_count:=error_line;
  end
@z

@x [22.317] l.7133 - pTeX: adjust kanji code pos
for q:=p to first_count-1 do print_char(trick_buf[q mod error_line]);
print_ln;
for q:=1 to n do print_char(" "); {print |n| spaces to begin line~2}
if m+n<=error_line then p:=first_count+m else p:=first_count+(error_line-n-3);
@y
if trick_buf2[p mod error_line]=2 then
  begin p:=p+1; n:=n-1;
  end;
for q:=p to first_count-1 do print_char(trick_buf[q mod error_line]);
print_ln;
for q:=1 to n do print_char(" "); {print |n| spaces to begin line~2}
if m+n<=error_line then p:=first_count+m else p:=first_count+(error_line-n-3);
if trick_buf2[(p-1) mod error_line]=1 then p:=p-1;
@z

@x [22.319] l.7157 - pTeX: adjust kanji code token
@ @<Pseudoprint the token list@>=
begin_pseudoprint;
if token_type<macro then show_token_list(start,loc,100000)
else show_token_list(link(start),loc,100000) {avoid reference count}
@y
@ @<Pseudoprint the token list@>=
begin_pseudoprint;
if token_type<macro then
  begin  if (token_type=backed_up)and(loc<>null) then
    begin  if (link(start)=null)and(check_kanji(info(start))) then {|wchar_token|}
      begin cur_input:=input_stack[base_ptr-1];
      s:=get_avail; info(s):=Lo(info(loc));
      cur_input:=input_stack[base_ptr];
      link(start):=s;
      show_token_list(start,loc,100000);
      free_avail(s);link(start):=null;
      goto done1;
      end;
    end;
  show_token_list(start,loc,100000);
  end
else show_token_list(link(start),loc,100000); {avoid reference count}
done1:
@z

@x [24.341] l.7479 - pTeX: set last_chr
@!cat:0..max_char_code; {|cat_code(cur_chr)|, usually}
@y
@!cat:escape..max_char_code; {|cat_code(cur_chr)|, usually}
@!l:0..buf_size; {temporary index into |buffer|}
@z

@x [24.343] l.7500 - pTeX: input external file
@ @<Input from external file, |goto restart| if no input found@>=
@^inner loop@>
begin switch: if loc<=limit then {current line not yet finished}
  begin cur_chr:=buffer[loc]; incr(loc);
  reswitch: cur_cmd:=cat_code(cur_chr);
@y
@ @<Input from external file, |goto restart| if no input found@>=
@^inner loop@>
begin switch: if loc<=limit then {current line not yet finished}
  begin cur_chr:=buffer[loc]; incr(loc);
    if multistrlen(ustringcast(buffer), limit+1, loc-1)=2 then
      begin cur_chr:=fromBUFF(ustringcast(buffer), limit+1, loc-1);
      cur_cmd:=kcat_code(kcatcodekey(cur_chr));
      incr(loc);
      end
    else reswitch: cur_cmd:=cat_code(cur_chr);
@z

@x [24.344] l.7535 - pTeX: ASCII-KANJI space handling
@d any_state_plus(#) == mid_line+#,skip_blanks+#,new_line+#
@y
@d any_state_plus(#) == mid_line+#,mid_kanji+#,skip_blanks+#,new_line+#
@z

@x [24.347] l.7569 - pTeX: scaner
@ @d add_delims_to(#)==#+math_shift,#+tab_mark,#+mac_param,
  #+sub_mark,#+letter,#+other_char
@y
@ @d add_delims_to(#)==#+math_shift,#+tab_mark,#+mac_param,
  #+sub_mark,#+letter,#+other_char
@d all_jcode(#)==#+kanji,#+kana,#+other_kchar
@z

@x [24.347] l.7573 - pTeX: scaner
mid_line+spacer:@<Enter |skip_blanks| state, emit a space@>;
mid_line+car_ret:@<Finish line, emit a space@>;
skip_blanks+car_ret,any_state_plus(comment):
  @<Finish line, |goto switch|@>;
new_line+car_ret:@<Finish line, emit a \.{\\par}@>;
mid_line+left_brace: incr(align_state);
skip_blanks+left_brace,new_line+left_brace: begin
  state:=mid_line; incr(align_state);
  end;
mid_line+right_brace: decr(align_state);
skip_blanks+right_brace,new_line+right_brace: begin
  state:=mid_line; decr(align_state);
  end;
add_delims_to(skip_blanks),add_delims_to(new_line): state:=mid_line;
@y
mid_kanji+spacer,mid_line+spacer:@<Enter |skip_blanks| state, emit a space@>;
mid_line+car_ret:@<Finish line, emit a space@>;
mid_kanji+car_ret: if skip_mode then @<Finish line, |goto switch|@>
  else @<Finish line, emit a space@>;
skip_blanks+car_ret,any_state_plus(comment):
  @<Finish line, |goto switch|@>;
new_line+car_ret:@<Finish line, emit a \.{\\par}@>;
mid_line+left_brace,mid_kanji+left_brace: incr(align_state);
skip_blanks+left_brace,new_line+left_brace: begin
  state:=mid_line; incr(align_state);
  end;
mid_line+right_brace,mid_kanji+right_brace: decr(align_state);
skip_blanks+right_brace,new_line+right_brace: begin
  state:=mid_line; decr(align_state);
  end;
add_delims_to(skip_blanks),add_delims_to(new_line),add_delims_to(mid_kanji):
  state:=mid_line;
all_jcode(skip_blanks),all_jcode(new_line),all_jcode(mid_line):
  state:=mid_kanji;

@ @<Global...@>=
skip_mode:boolean;

@ @<Set init...@>=
skip_mode:=true;
@z

@x [24.354] l.7659 - pTeX: scan control sequence
@<Scan a control...@>=
begin if loc>limit then cur_cs:=null_cs {|state| is irrelevant in this case}
else  begin start_cs: k:=loc; cur_chr:=buffer[k]; cat:=cat_code(cur_chr);
  incr(k);
  if cat=letter then state:=skip_blanks
  else if cat=spacer then state:=skip_blanks
  else state:=mid_line;
  if (cat=letter)and(k<=limit) then
    @<Scan ahead in the buffer until finding a nonletter;
    if an expanded code is encountered, reduce it
    and |goto start_cs|; otherwise if a multiletter control
    sequence is found, adjust |cur_cs| and |loc|, and
    |goto found|@>
  else @<If an expanded code is present, reduce it and |goto start_cs|@>;
  cur_cs:=single_base+buffer[loc]; incr(loc);
  end;
found: cur_cmd:=eq_type(cur_cs); cur_chr:=equiv(cur_cs);
if cur_cmd>=outer_call then check_outer_validity;
end
@y
@<Scan a control...@>=
begin if loc>limit then cur_cs:=null_cs {|state| is irrelevant in this case}
else  begin k:=loc; cur_chr:=buffer[k]; incr(k);
  if multistrlen(ustringcast(buffer), limit+1, k-1)=2 then
    begin cat:=kcat_code(kcatcodekey(fromBUFF(ustringcast(buffer), limit+1, k-1))); incr(k);
    end
  else cat:=cat_code(cur_chr);
start_cs:
  if (cat=letter)or(cat=kanji)or(cat=kana) then state:=skip_blanks
  else if cat=spacer then state:=skip_blanks
  else if cat=other_kchar then state:=mid_kanji
  else state:=mid_line;
  if cat=other_kchar then
    begin cur_cs:=id_lookup(loc,k-loc); loc:=k; goto found;
    end
  else if ((cat=letter)or(cat=kanji)or(cat=kana))and(k<=limit) then
    @<Scan ahead in the buffer until finding a nonletter;
    if an expanded code is encountered, reduce it
    and |goto start_cs|; otherwise if a multiletter control
    sequence is found, adjust |cur_cs| and |loc|, and
    |goto found|@>
  else @<If an expanded code is present, reduce it and |goto start_cs|@>;
  {single-letter control sequence}
  if (cat=kanji)or(cat=kana) then
    begin cur_cs:=id_lookup(loc,k-loc); loc:=k; goto found;
    end
  else begin cur_cs:=single_base+buffer[loc]; incr(loc); end;
  end;
found: cur_cmd:=eq_type(cur_cs); cur_chr:=equiv(cur_cs);
if cur_cmd>=outer_call then check_outer_validity;
end
@z

@x
@<If an expanded...@>=
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
@<If an expanded...@>=
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;
    l:=k; cur_chr:=buffer[k-1]; cat:=cat_code(cur_chr);
    while l<=limit do
      begin buffer[l]:=buffer[l+d]; incr(l);
      end;
    goto start_cs;
    end;
  end;
end
@z

@x [24.356] l.7727 - pTeX: scan control sequence (cont)
@ @<Scan ahead in the buffer...@>=
begin repeat cur_chr:=buffer[k]; cat:=cat_code(cur_chr); incr(k);
until (cat<>letter)or(k>limit);
@<If an expanded...@>;
if cat<>letter then decr(k);
  {now |k| points to first nonletter}
if k>loc+1 then {multiletter control sequence has been scanned}
  begin cur_cs:=id_lookup(loc,k-loc); loc:=k; goto found;
  end;
end
@y
@ @<Scan ahead in the buffer...@>=
begin repeat cur_chr:=buffer[k]; incr(k);
  if multistrlen(ustringcast(buffer), limit+1, k-1)=2 then
    begin cat:=kcat_code(kcatcodekey(fromBUFF(ustringcast(buffer), limit+1, k-1))); incr(k);
    end
  else cat:=cat_code(cur_chr);
  while (buffer[k]=cur_chr)and(cat=sup_mark)and(k<limit) do
    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;
        end
      else if c<@'100 then cur_chr:=c+@'100
      else cur_chr:=c-@'100;
      cat:=cat_code(cur_chr);
      if (cat=letter)or(cat=sup_mark) then
        begin buffer[k-1]:=cur_chr;
        limit:=limit-d; first:=first-d;
        l:=k;
        while l<=limit do
          begin buffer[l]:=buffer[l+d]; incr(l);
          end;
        end;
      end;
    end;
until not((cat=letter)or(cat=kanji)or(cat=kana))or(k>limit);
{@@<If an expanded...@@>;}
if not((cat=letter)or(cat=kanji)or(cat=kana)) then decr(k);
if cat=other_kchar then decr(k); {now |k| points to first nonletter}
if k>loc+1 then {multiletter control sequence has been scanned}
  begin cur_cs:=id_lookup(loc,k-loc); loc:=k; goto found;
  end;
end
@z

@x [24.357] l.7771 - pTeX: input from token list
@<Input from token list, |goto restart| if end of list or
  if a parameter needs to be expanded@>=
if loc<>null then {list not exhausted}
@^inner loop@>
  begin t:=info(loc); loc:=link(loc); {move to next}
  if t>=cs_token_flag then {a control sequence token}
    begin cur_cs:=t-cs_token_flag;
    cur_cmd:=eq_type(cur_cs); cur_chr:=equiv(cur_cs);
    if cur_cmd>=outer_call then
      if cur_cmd=dont_expand then
        @<Get the next token, suppressing expansion@>
      else check_outer_validity;
    end
  else  begin cur_cmd:=t div @'400; cur_chr:=t mod @'400;
    case cur_cmd of
    left_brace: incr(align_state);
    right_brace: decr(align_state);
    out_param: @<Insert macro parameter and |goto restart|@>;
    othercases do_nothing
    endcases;
    end;
  end
else  begin {we are done with this token list}
  end_token_list; goto restart; {resume previous level}
  end
@y
@<Input from token list, |goto restart| if end of list or
  if a parameter needs to be expanded@>=
if loc<>null then {list not exhausted}
@^inner loop@>
  begin t:=info(loc); loc:=link(loc); {move to next}
  if t>=cs_token_flag then {a control sequence token}
    begin cur_cs:=t-cs_token_flag;
    cur_cmd:=eq_type(cur_cs); cur_chr:=equiv(cur_cs);
    if cur_cmd>=outer_call then
      if cur_cmd=dont_expand then
        @<Get the next token, suppressing expansion@>
      else check_outer_validity;
    end
  else if check_kanji(t) then {|wchar_token|}
    begin cur_chr:=t; cur_cmd:=kcat_code(kcatcodekey(t));
    end
  else
    begin cur_cmd:=Hi(t); cur_chr:=Lo(t);
    case cur_cmd of
    left_brace: incr(align_state);
    right_brace: decr(align_state);
    out_param: @<Insert macro parameter and |goto restart|@>;
    othercases do_nothing
    endcases;
    end;
  end
else  begin {we are done with this token list}
  end_token_list; goto restart; {resume previous level}
  end
@z

@x [24.365] l.7935 - pTeX: get_token
@p procedure get_token; {sets |cur_cmd|, |cur_chr|, |cur_tok|}
begin no_new_control_sequence:=false; get_next; no_new_control_sequence:=true;
@^inner loop@>
if cur_cs=0 then cur_tok:=(cur_cmd*@'400)+cur_chr
else cur_tok:=cs_token_flag+cur_cs;
end;
@y
@p procedure get_token; {sets |cur_cmd|, |cur_chr|, |cur_tok|}
begin no_new_control_sequence:=false; get_next; no_new_control_sequence:=true;
@^inner loop@>
if cur_cs=0 then
  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then {|wchar_token|}
    cur_tok:=cur_chr
  else cur_tok:=(cur_cmd*@'400)+cur_chr
else cur_tok:=cs_token_flag+cur_cs;
end;
@z

@x [25.374] l.8073 - pTeX: get_chr
@ @<Look up the characters of list |r| in the hash table...@>=
j:=first; p:=link(r);
while p<>null do
  begin if j>=max_buf_stack then
    begin max_buf_stack:=j+1;
    if max_buf_stack=buf_size then
      overflow("buffer size",buf_size);
@:TeX capacity exceeded buffer size}{\quad buffer size@>
    end;
  buffer[j]:=info(p) mod @'400; incr(j); p:=link(p);
  end;
@y
@ @<Look up the characters of list |r| in the hash table...@>=
j:=first; p:=link(r);
while p<>null do
  begin if j>=max_buf_stack then
    begin max_buf_stack:=j+1;
    if max_buf_stack=buf_size then
      overflow("buffer size",buf_size);
@:TeX capacity exceeded buffer size}{\quad buffer size@>
    end;
  if check_kanji(info(p)) then {|wchar_token|}
    begin buffer[j]:=Hi(info(p)); incr(j);
    end;
  buffer[j]:=Lo(info(p)); incr(j); p:=link(p);
  end;
@z

@x [25.380] l.8221 - pTeX: get_x_token
@p procedure get_x_token; {sets |cur_cmd|, |cur_chr|, |cur_tok|,
  and expands macros}
label restart,done;
begin restart: get_next;
@^inner loop@>
if cur_cmd<=max_command then goto done;
if cur_cmd>=call then
  if cur_cmd<end_template then macro_call
  else  begin cur_cs:=frozen_endv; cur_cmd:=endv;
    goto done; {|cur_chr=null_list|}
    end
else expand;
goto restart;
done: if cur_cs=0 then cur_tok:=(cur_cmd*@'400)+cur_chr
else cur_tok:=cs_token_flag+cur_cs;
end;
@y
@p procedure get_x_token; {sets |cur_cmd|, |cur_chr|, |cur_tok|,
  and expands macros}
label restart,done;
begin restart: get_next;
@^inner loop@>
if cur_cmd<=max_command then goto done;
if cur_cmd>=call then
  if cur_cmd<end_template then macro_call
  else  begin cur_cs:=frozen_endv; cur_cmd:=endv;
    goto done; {|cur_chr=null_list|}
    end
else expand;
goto restart;
done: if cur_cs=0 then
  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
    cur_tok:=cur_chr
  else cur_tok:=(cur_cmd*@'400)+cur_chr
else cur_tok:=cs_token_flag+cur_cs;
end;
@z

@x [25.381] l.8151 - pTeX: x_token
@p procedure x_token; {|get_x_token| without the initial |get_next|}
begin while cur_cmd>max_command do
  begin expand;
  get_next;
  end;
if cur_cs=0 then cur_tok:=(cur_cmd*@'400)+cur_chr
else cur_tok:=cs_token_flag+cur_cs;
@y
@p procedure x_token; {|get_x_token| without the initial |get_next|}
begin while cur_cmd>max_command do
  begin expand;
  get_next;
  end;
if cur_cs=0 then
  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
    cur_tok:=cur_chr
  else cur_tok:=(cur_cmd*@'400)+cur_chr
else cur_tok:=cs_token_flag+cur_cs;
@z

@x [26.413] l.8341 - pTeX: scan_something_internal
@p procedure scan_something_internal(@!level:small_number;@!negative:boolean);
@y
@p @t\4@>@<Declare procedures needed in |scan_something_internal|@>@t@>@/
procedure scan_something_internal(@!level:small_number;@!negative:boolean);
@z
@x [26.413] l.8343 - pTeX: scan_something_internal
var m:halfword; {|chr_code| part of the operand token}
@y
var m:halfword; {|chr_code| part of the operand token}
@!tx:pointer; {effective tail node}
@!qx:halfword; {general purpose index}
@z
@x [26.413] l.8345 - pTeX: scan_something_internal
begin m:=cur_chr;
case cur_cmd of
def_code: @<Fetch a character code from some table@>;
toks_register,assign_toks,def_family,set_font,def_font: @<Fetch a token list or
  font identifier, provided that |level=tok_val|@>;
@y
@!q,@!r:pointer;
begin m:=cur_chr;
case cur_cmd of
assign_kinsoku: @<Fetch breaking penalty from some table@>;
assign_inhibit_xsp_code: @<Fetch inhibit type from some table@>;
def_code: @<Fetch a character code from some table@>;
toks_register,assign_toks,def_family,set_font,def_font,def_jfont,def_tfont:
  @<Fetch a token list or font identifier, provided that |level=tok_val|@>;
@z

@x [26.414] l.8373 - pTeX:
begin scan_char_num;
if m=math_code_base then scanned_result(ho(math_code(cur_val)))(int_val)
else if m<math_code_base then scanned_result(equiv(m+cur_val))(int_val)
else scanned_result(eqtb[m+cur_val].int)(int_val);
@y
begin
if m=math_code_base then
  begin scan_ascii_num;
  scanned_result(ho(math_code(cur_val)))(int_val); end
else if m=kcat_code_base then
  begin scan_char_num;
  scanned_result(equiv(m+kcatcodekey(cur_val)))(int_val); end
else if m<math_code_base then { \.{\\lccode}, \.{\\uccode}, \.{\\sfcode}, \.{\\catcode} }
  begin scan_ascii_num;
  scanned_result(equiv(m+cur_val))(int_val) end
else { \.{\\delcode} }
  begin scan_ascii_num;
  scanned_result(eqtb[m+cur_val].int)(int_val) end;
@z

@x pTeX: \ptexversion
@d badness_code=glue_val+2 {code for \.{\\badness}}
@y
@d badness_code=glue_val+2 {code for \.{\\badness}}
@d ptex_version_code=badness_code+1 {code for \.{\\ptexversion}}
@d ptex_minor_version_code=ptex_version_code+1 {code for \.{\\ptexminorversion}}
@z

@x pTeX: \ptexversion
primitive("badness",last_item,badness_code);
@!@:badness_}{\.{\\badness} primitive@>
@y
primitive("badness",last_item,badness_code);
@!@:badness_}{\.{\\badness} primitive@>
primitive("ptexversion",last_item,ptex_version_code);
@!@:ptexversion_}{\.{\\ptexversion} primitive@>
primitive("ptexminorversion",last_item,ptex_minor_version_code);
@!@:ptexminorversion_}{\.{\\ptexminorversion} primitive@>
@z

@x pTeX: \ptexversion
  input_line_no_code: print_esc("inputlineno");
@y
  input_line_no_code: print_esc("inputlineno");
  ptex_version_code: print_esc("ptexversion");
  ptex_minor_version_code: print_esc("ptexminorversion");
@z

@x [26.420] l.8474 - pTeX: Fetch a box dimension: dir_node
begin scan_eight_bit_int;
if box(cur_val)=null then cur_val:=0 @+else cur_val:=mem[box(cur_val)+m].sc;
@y
begin scan_eight_bit_int; q:=box(cur_val);
if q=null then cur_val:=0
else  begin qx:=q;
  while (q<>null)and(abs(box_dir(q))<>abs(direction)) do q:=link(q);
  if q=null then
    begin r:=link(qx); link(qx):=null;
    q:=new_dir_node(qx,abs(direction)); link(qx):=r;
    cur_val:=mem[q+m].sc;
    delete_glue_ref(space_ptr(q)); delete_glue_ref(xspace_ptr(q));
    free_node(q,box_node_size);
    end
  else cur_val:=mem[q+m].sc;
  end;
@z

@x [26.424] l.8508 - pTeX: disp_node
legal in similar contexts.
@y
legal in similar contexts.

The macro |find_effective_tail_pTeX| sets |tx| to the last non-|disp_node|
of the current list.
@z

@x [26.424] l.8510 - pTeX: disp_node
@<Fetch an item in the current node...@>=
@y
@d find_effective_tail_pTeX==
tx:=tail;
if not is_char_node(tx) then
  if type(tx)=disp_node then
    begin tx:=prev_node;
    if not is_char_node(tx) then
      if type(tx)=disp_node then {|disp_node| from a discretionary}
        begin tx:=head; q:=link(head);
        while q<>prev_node do
          begin if is_char_node(q) then tx:=q
          else if type(q)<>disp_node then tx:=q;
          end;
        q:=link(q);
        end;
    end
@#
@d find_effective_tail==find_effective_tail_pTeX

@<Fetch an item in the current node...@>=
@z

@x pTeX: \ptexversion 
  begin if cur_chr=input_line_no_code then cur_val:=line
  else cur_val:=last_badness; {|cur_chr=badness_code|}
@y
  begin case m of
    input_line_no_code: cur_val:=line;
    badness_code: cur_val:=last_badness;
    ptex_version_code: cur_val:=pTeX_version;
    ptex_minor_version_code: cur_val:=pTeX_minor_version;
  end; {there and no other cases}
@z

@x [26.424] l.8516 - pTeX: Fetch an item ...: disp_node
else begin if cur_chr=glue_val then cur_val:=zero_glue@+else cur_val:=0;
@y
else begin if cur_chr=glue_val then cur_val:=zero_glue@+else cur_val:=0;
  find_effective_tail;
@z
@x [26.424] l.8518 - pTeX: Fetch an item ...: disp_node
  if not is_char_node(tail)and(mode<>0) then
    case cur_chr of
    int_val: if type(tail)=penalty_node then cur_val:=penalty(tail);
    dimen_val: if type(tail)=kern_node then cur_val:=width(tail);
    glue_val: if type(tail)=glue_node then
      begin cur_val:=glue_ptr(tail);
      if subtype(tail)=mu_glue then cur_val_level:=mu_val;
      end;
@y
  if not is_char_node(tx)and(tx<>head)and(mode<>0) then
    case cur_chr of
    int_val: if type(tx)=penalty_node then cur_val:=penalty(tx);
    dimen_val: if type(tx)=kern_node then cur_val:=width(tx);
    glue_val: if type(tx)=glue_node then
      begin cur_val:=glue_ptr(tx);
      if subtype(tx)=mu_glue then cur_val_level:=mu_val;
      end;
@z
@x [26.424] l.8527 - pTeX: Fetch an item ...: disp_node
  else if (mode=vmode)and(tail=head) then
@y
  else if (mode=vmode)and(tx=head) then
@z

@x [26.435] l.8940 - pTeX: scan_char_num
procedure scan_char_num;
begin scan_int;
if (cur_val<0)or(cur_val>255) then
  begin print_err("Bad character code");
@.Bad character code@>
  help2("A character number must be between 0 and 255.")@/
    ("I changed this one to zero."); int_error(cur_val); cur_val:=0;
  end;
end;
@y
procedure scan_ascii_num;
begin scan_int;
if (cur_val<0)or(cur_val>255) then
  begin print_err("Bad character code");
@.Bad character code@>
  help2("A character number must be between 0 and 255.")@/
    ("I changed this one to zero."); int_error(cur_val); cur_val:=0;
  end;
end;
procedure scan_char_num;
begin scan_int;
if not is_char_ascii(cur_val) and not is_char_kanji(cur_val) then
  begin print_err("Bad character code");
@.Bad character code@>
  help2("A character number must be between 0 and 255, or KANJI code.")@/
    ("I changed this one to zero."); int_error(cur_val); cur_val:=0;
  end;
end;
@z

@x [26.442] l.9045 - pTeX: KANJI character scanning
@<Scan an alphabetic character code into |cur_val|@>=
begin get_token; {suppress macro expansion}
if cur_tok<cs_token_flag then
  begin cur_val:=cur_chr;
  if cur_cmd<=right_brace then
    if cur_cmd=right_brace then incr(align_state)
    else decr(align_state);
  end
else if cur_tok<cs_token_flag+single_base then
  cur_val:=cur_tok-cs_token_flag-active_base
else cur_val:=cur_tok-cs_token_flag-single_base;
if cur_val>255 then
  begin print_err("Improper alphabetic constant");
@.Improper alphabetic constant@>
  help2("A one-character control sequence belongs after a ` mark.")@/
    ("So I'm essentially inserting \0 here.");
  cur_val:="0"; back_error;
  end
else @<Scan an optional space@>;
end
@y
@<Scan an alphabetic character code into |cur_val|@>=
begin get_token; {suppress macro expansion}
if cur_tok<cs_token_flag then
  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then {|wchar_token|}
    begin skip_mode:=false; cur_val:=tonum(cur_chr);
    end
  else begin cur_val:=cur_chr;
  if cur_cmd<=right_brace then
    if cur_cmd=right_brace then incr(align_state)
    else decr(align_state);
  end
else if cur_tok<cs_token_flag+single_base then
  cur_val:=cur_tok-cs_token_flag-active_base
else cur_val:=cur_tok-cs_token_flag-single_base;
if (cur_val>255)and((cur_cmd<kanji)or(cur_cmd>max_char_code)) then
  begin print_err("Improper alphabetic or KANJI constant");
@.Improper alphabetic constant@>
  help2("A one-character control sequence belongs after a ` mark.")@/
    ("So I'm essentially inserting \0 here.");
  cur_val:="0"; back_error;
  end
else @<Scan an optional space@>;
skip_mode:=true;
end
@z

@x [26.455] l.9288 - pTeX: zw, zh: zenkaku width & height
if scan_keyword("em") then v:=(@<The em width for |cur_font|@>)
@.em@>
else if scan_keyword("ex") then v:=(@<The x-height for |cur_font|@>)
@.ex@>
else goto not_found;
@y
if scan_keyword("em") then v:=(@<The em width for |cur_font|@>)
@.em@>
else if scan_keyword("ex") then v:=(@<The x-height for |cur_font|@>)
@.ex@>
else if scan_keyword("zw") then @<The KANJI width for |cur_jfont|@>
@.ze@>
else if scan_keyword("zh") then @<The KANJI height for |cur_jfont|@>
@.zh@>
else goto not_found;
@z

@x [26.458] l.9345 - pTeX: dimension unit: Q, H (1/4 mm)
else if scan_keyword("sp") then goto done
@.sp@>
@y
else if scan_keyword("H") then set_conversion(7227)(10160)
@.H@>
else if scan_keyword("Q") then set_conversion(7227)(10160)
@.Q@>
else if scan_keyword("sp") then goto done
@.sp@>
@z

@x [26.459] pTeX: help message
help6("Dimensions can be in units of em, ex, in, pt, pc,")@/
  ("cm, mm, dd, cc, bp, or sp; but yours is a new one!")@/
@y
help6("Dimensions can be in units of em, ex, zw, zh, in, pt, pc,")@/
  ("cm, mm, dd, cc, bp, H, Q, or sp; but yours is a new one!")@/
@z

@x [27.464] l.9475 - pTeX: str_toks
  if t=" " then t:=space_token
  else t:=other_token+t;
@y
  if multistrlen(ustringcast(str_pool), pool_ptr, k)=2 then
    begin t:=fromBUFF(ustringcast(str_pool), pool_ptr, k); incr(k);
    end
  else if t=" " then t:=space_token
  else t:=other_token+t;
@z

@x [27.468] l.9531 - pTeX: convert KANJI code
@d number_code=0 {command code for \.{\\number}}
@d roman_numeral_code=1 {command code for \.{\\romannumeral}}
@d string_code=2 {command code for \.{\\string}}
@d meaning_code=3 {command code for \.{\\meaning}}
@d font_name_code=4 {command code for \.{\\fontname}}
@d job_name_code=5 {command code for \.{\\jobname}}
@y
@d number_code=0 {command code for \.{\\number}}
@d roman_numeral_code=1 {command code for \.{\\romannumeral}}
@d kansuji_code=2 {command code for \.{\\kansuji}}
@d string_code=3 {command code for \.{\\string}}
@d meaning_code=4 {command code for \.{\\meaning}}
@d font_name_code=5 {command code for \.{\\fontname}}
@d euc_code=6 {command code for \.{\\euc}}
@d sjis_code=7 {command code for \.{\\sjis}}
@d jis_code=8 {command code for \.{\\jis}}
@d kuten_code=9 {command code for \.{\\kuten}}
@d ptex_revision_code=10 {command code for \.{\\ptexrevision}}
@d ptex_convert_codes=11 {end of \pTeX's command codes}
@d job_name_code=ptex_convert_codes {command code for \.{\\jobname}}
@z

@x [27.468] l.9547 - pTeX:
primitive("fontname",convert,font_name_code);@/
@!@:font_name_}{\.{\\fontname} primitive@>
@y
primitive("fontname",convert,font_name_code);@/
@!@:font_name_}{\.{\\fontname} primitive@>
primitive("kansuji",convert,kansuji_code);
@!@:kansuji_}{\.{\\kansuji} primitive@>
primitive("euc",convert,euc_code);
@!@:euc_}{\.{\\euc} primitive@>
primitive("sjis",convert,sjis_code);
@!@:sjis_}{\.{\\sjis} primitive@>
primitive("jis",convert,jis_code);
@!@:jis_}{\.{\\jis} primitive@>
primitive("kuten",convert,kuten_code);
@!@:kuten_}{\.{\\kuten} primitive@>
primitive("ptexrevision",convert,ptex_revision_code);
@!@:ptexrevision_}{\.{\\ptexrevision} primitive@>
@z

@x [27.469] l.9558 - pTeX:
  font_name_code: print_esc("fontname");
@y
  font_name_code: print_esc("fontname");
  kansuji_code: print_esc("kansuji");
  euc_code:print_esc("euc");
  sjis_code:print_esc("sjis");
  jis_code:print_esc("jis");
  kuten_code:print_esc("kuten");
  ptex_revision_code:print_esc("ptexrevision");
@z

@x [27.470] l.9566 - pTeX: convert KANJI code continue
@p procedure conv_toks;
var old_setting:0..max_selector; {holds |selector| setting}
@y
@p procedure conv_toks;
var old_setting:0..max_selector; {holds |selector| setting}
@!cx:KANJI_code; {temporary register for KANJI}
@z

@x [27.471] l.9577 - pTeX: convert KANJI code continue
@ @<Scan the argument for command |c|@>=
case c of
number_code,roman_numeral_code: scan_int;
string_code, meaning_code: begin save_scanner_status:=scanner_status;
  scanner_status:=normal; get_token; scanner_status:=save_scanner_status;
  end;
@y
@ @<Scan the argument for command |c|@>=
KANJI(cx):=0;
case c of
number_code,roman_numeral_code,
kansuji_code,euc_code,sjis_code,jis_code,kuten_code: scan_int;
ptex_revision_code: do_nothing;
string_code, meaning_code: begin save_scanner_status:=scanner_status;
  scanner_status:=normal; get_token;
  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then {|wchar_token|}
    KANJI(cx):=cur_tok;
  scanner_status:=save_scanner_status;
  end;
@z

@x [27.471] l.9587 - pTeX: convert KANJI code continue
@ @<Print the result of command |c|@>=
case c of
number_code: print_int(cur_val);
roman_numeral_code: print_roman_int(cur_val);
string_code:if cur_cs<>0 then sprint_cs(cur_cs)
  else print_char(cur_chr);
@y
@ @<Print the result of command |c|@>=
case c of
number_code: print_int(cur_val);
roman_numeral_code: print_roman_int(cur_val);
jis_code:   print_int(fromJIS(cur_val));
euc_code:   print_int(fromEUC(cur_val));
sjis_code:  print_int(fromSJIS(cur_val));
kuten_code: print_int(fromKUTEN(cur_val));
ptex_revision_code: print(pTeX_revision);
kansuji_code: print_kansuji(cur_val);
string_code:if cur_cs<>0 then sprint_cs(cur_cs)
  else if KANJI(cx)=0 then print_char(cur_chr)
  else print_kanji(cx);
@z

@x [28.487] l.9852 - pTeX: iftdir, ifydir, ifddir, iftbox, ifybox, ifdbox
@d if_case_code=16 { `\.{\\ifcase}' }
@y
@d if_case_code=16 { `\.{\\ifcase}' }
@#
@d if_tdir_code=if_case_code+1 { `\.{\\iftdir}' }
@d if_ydir_code=if_tdir_code+1 { `\.{\\ifydir}' }
@d if_ddir_code=if_ydir_code+1 { `\.{\\ifddir}' }
@d if_mdir_code=if_ddir_code+1 { `\.{\\ifmdir}' }
@d if_tbox_code=if_mdir_code+1 { `\.{\\iftbox}' }
@d if_ybox_code=if_tbox_code+1 { `\.{\\ifybox}' }
@d if_dbox_code=if_ybox_code+1 { `\.{\\ifdbox}' }
@d if_mbox_code=if_dbox_code+1 { `\.{\\ifmbox}' }
@z

@x [28.487] l.9887 - pTeX: iftdir, ifydir, ifddir, iftbox, ifybox, ifdbox
primitive("ifcase",if_test,if_case_code);
@!@:if_case_}{\.{\\ifcase} primitive@>
@y
primitive("ifcase",if_test,if_case_code);
@!@:if_case_}{\.{\\ifcase} primitive@>
primitive("iftdir",if_test,if_tdir_code);
@!@:if_tdir_}{\.{\\iftdir} primitive@>
primitive("ifydir",if_test,if_ydir_code);
@!@:if_ydir_}{\.{\\ifydir} primitive@>
primitive("ifddir",if_test,if_ddir_code);
@!@:if_ddir_}{\.{\\ifddir} primitive@>
primitive("ifmdir",if_test,if_mdir_code);
@!@:if_mdir_}{\.{\\ifmdir} primitive@>
primitive("iftbox",if_test,if_tbox_code);
@!@:if_tbox_}{\.{\\iftbox} primitive@>
primitive("ifybox",if_test,if_ybox_code);
@!@:if_ybox_}{\.{\\ifybox} primitive@>
primitive("ifdbox",if_test,if_dbox_code);
@!@:if_dbox_}{\.{\\ifdbox} primitive@>
primitive("ifmbox",if_test,if_mbox_code);
@!@:if_mbox_}{\.{\\ifmbox} primitive@>
@z

@x [28.488] l.9907 - pTeX: iftdir, ifydir, ifddir, iftbox, ifybox, ifdbox
  if_case_code:print_esc("ifcase");
@y
  if_case_code:print_esc("ifcase");
  if_tdir_code:print_esc("iftdir");
  if_ydir_code:print_esc("ifydir");
  if_ddir_code:print_esc("ifddir");
  if_mdir_code:print_esc("ifmdir");
  if_tbox_code:print_esc("iftbox");
  if_ybox_code:print_esc("ifybox");
  if_dbox_code:print_esc("ifdbox");
  if_mbox_code:print_esc("ifmbox");
@z

@x [28.501] l.10073 - pTeX: iftdir, ifydir, ifddir, iftbox, ifybox, ifdbox
if_void_code, if_hbox_code, if_vbox_code: @<Test box register status@>;
@y
if_tdir_code: b:=(abs(direction)=dir_tate);
if_ydir_code: b:=(abs(direction)=dir_yoko);
if_ddir_code: b:=(abs(direction)=dir_dtou);
if_mdir_code: b:=(direction<0);
if_void_code, if_hbox_code, if_vbox_code, if_tbox_code, if_ybox_code, if_dbox_code, if_mbox_code:
  @<Test box register status@>;
@z

@x [28.505] l.10118 - pTeX: Test box register status : iftbox, ifybox, ifdbox
if this_if=if_void_code then b:=(p=null)
else if p=null then b:=false
else if this_if=if_hbox_code then b:=(type(p)=hlist_node)
else b:=(type(p)=vlist_node);
@y
if this_if=if_void_code then b:=(p=null)
else if p=null then b:=false
else begin
  if type(p)=dir_node then p:=list_ptr(p);
  if this_if=if_hbox_code then b:=(type(p)=hlist_node)
  else if this_if=if_vbox_code then b:=(type(p)=vlist_node)
  else if this_if=if_tbox_code then b:=(abs(box_dir(p))=dir_tate)
  else if this_if=if_ybox_code then b:=(abs(box_dir(p))=dir_yoko)
  else if this_if=if_dbox_code then b:=(abs(box_dir(p))=dir_dtou)
  else b:=(box_dir(p)<0);
  end
@z

@x [28.502] l.10138 - pTeX: ifx : Test character : KANJI character
if (cur_cmd>active_char)or(cur_chr>255) then {not a character}
  begin m:=relax; n:=256;
  end
else  begin m:=cur_cmd; n:=cur_chr;
  end;
get_x_token_or_active_char;
if (cur_cmd>active_char)or(cur_chr>255) then
  begin cur_cmd:=relax; cur_chr:=256;
  end;
@y
if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
  begin m:=cur_cmd; n:=cur_chr;
  end
else if (cur_cmd>active_char)or(cur_chr>255) then
  begin m:=relax; n:=256;
  end
else  begin m:=cur_cmd; n:=cur_chr;
  end;
get_x_token_or_active_char;
if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
  begin cur_cmd:=cur_cmd;
  end {dummy}
else if (cur_cmd>active_char)or(cur_chr>255) then
  begin cur_cmd:=relax; cur_chr:=256;
  end;
@z

@x pTeX for Windows, treat filename with 0x5c
@p procedure begin_name;
begin area_delimiter:=0; ext_delimiter:=0; quoted_filename:=false;
end;
@y
@p procedure begin_name;
begin area_delimiter:=0; ext_delimiter:=0; quoted_filename:=false; prev_char:=0;
end;
@z

@x pTeX for Windows, treat filename with 0x5c
else  begin str_room(1); append_char(c); {contribute |c| to the current string}
  if IS_DIR_SEP(c) then
    begin area_delimiter:=cur_length; ext_delimiter:=0;
    end
  else if c="." then ext_delimiter:=cur_length;
  more_name:=true;
  end;
end;
@y
else  begin str_room(1); append_char(c); {contribute |c| to the current string}
  if (IS_DIR_SEP(c)and(not_kanji_char_seq(prev_char,c))) then
    begin area_delimiter:=cur_length; ext_delimiter:=0;
    end
  else if c="." then ext_delimiter:=cur_length;
  more_name:=true;
  end;
  prev_char:=c;
end;
@z

@x [29.526] l.10668 - pTeX: scan file name
loop@+begin if (cur_cmd>other_char)or(cur_chr>255) then {not a character}
    begin back_input; goto done;
    end;
  {If |cur_chr| is a space and we're not scanning a token list, check
   whether we're at the end of the buffer. Otherwise we end up adding
   spurious spaces to file names in some cases.}
  if (cur_chr=" ") and (state<>token_list) and (loc>limit) then goto done;
  if not more_name(cur_chr) then goto done;
  get_x_token;
  end;
done: end_name; name_in_progress:=false;
@y
skip_mode:=false;
loop@+begin
  if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then {is kanji}
    begin str_room(2);
    append_char(Hi(cur_chr)); {kanji upper byte}
    append_char(Lo(cur_chr)); {kanji lower byte}
    end
  else if (cur_cmd>other_char)or(cur_chr>255) then {not an alphabet}
    begin back_input; goto done;
    end
  {If |cur_chr| is a space and we're not scanning a token list, check
   whether we're at the end of the buffer. Otherwise we end up adding
   spurious spaces to file names in some cases.}
   else if ((cur_chr=" ") and (state<>token_list) and (loc>limit)) or not more_name(cur_chr) then goto done;
  get_x_token;
  end;
done: end_name; name_in_progress:=false;
skip_mode:=true;
@z

@x [29.536] l.10834 - pTeX:
begin
if src_specials_p or file_line_error_style_p or parse_first_line_p
then
  wlog(banner_k)
else
  wlog(banner);
@y
begin
if src_specials_p or file_line_error_style_p or parse_first_line_p
then
  wlog(banner_k)
else
  wlog(banner);
  wlog(' (');
  wlog(conststringcast(get_enc_string));
  wlog(')');
@z

@x [30.560] l.10968 - pTeX:
This is called BigEndian order.
@!@^BigEndian order@>
@y
This is called BigEndian order.
@!@^BigEndian order@>

We get \TeX\ knowledge about KANJI fonts from \.{JFM} files.
The \.{JFM} format holds more two 16-bit integers, |id| and |nt|,
at the top of the file.
$$\vbox{\halign{\hfil#&$\null=\null$#\hfil\cr
|id|&identification code of the file;\cr
|nt|&number of words in the |char_type| table;\cr}}$$
The identification byte, |id| equals~11 or~9. When \TeX\ reads a font file,
the |id| equals~11 or~9 then the font is the \.{JFM}, othercases it is
the \.{TFM} file. The \.{TFM} holds |lf| at the same postion of |id|,
usually it takes a larger number than~9 or~11.
The |nt| is nonnegative and less than $2^{15}$.

We must have |bc=0|,
$$\hbox{|lf=7+lh+nt+(ec-bc+1)+nw+nh+nd+ni+nl+nk+ne+np|.}$$

@d yoko_jfm_id=11 {for `yoko-kumi' fonts}
@d tate_jfm_id=9  {for `tate-kumi' fonts}
@z

@x [30.544] l.11085 - pTeX: gk_tag
operation looks for both |list_tag| and |ext_tag|.
@y
operation looks for both |list_tag| and |ext_tag|.

If the \.{JFM}, the |lig_tag| is called |gk_tag|. The |gk_tag| means that
this character has a glue/kerning program starting at position |remainder|
in the |glue_kern| array. And a \.{JFM} does not use |tag=2| and |tag=3|.
@z

@x [30.544] l.11088 - pTeX: gk_tag
@d lig_tag=1 {character has a ligature/kerning program}
@y
@d lig_tag=1 {character has a ligature/kerning program}
@d gk_tag=1 {character has a glue/kerning program}
@z

@x [30.549] l.11228 - pTeX:
@<Glob...@>=
@!font_info: ^fmemory_word;
@y
@<Glob...@>=
@!font_info: ^memory_word; {pTeX: use halfword for |char_type| table.}
@!font_dir: ^eight_bits;
  {pTeX: direction of fonts, 0 is default, 1 is Yoko, 2 is Tate}
@!font_num_ext: ^integer;
  {pTeX: number of the |char_type| table.}
@z

@x [30.550] l.11270 - pTeX:
@!char_base: ^integer;
  {base addresses for |char_info|}
@y
@!char_base: ^integer;
  {base addresses for |char_info|}
@!ctype_base: ^integer;
  {pTeX: base addresses for KANJI character type parameters}
@z

@x [30.554] l.11373 - pTeX:
@d orig_char_info_end(#)==#].qqqq
@d orig_char_info(#)==font_info[char_base[#]+orig_char_info_end
@y
@d orig_char_info_end(#)==#].qqqq
@d orig_char_info(#)==font_info[char_base[#]+orig_char_info_end
@#
@d kchar_code_end(#)==#].hh.rh
@d kchar_code(#)==font_info[ctype_base[#]+kchar_code_end
@d kchar_type_end(#)==#].hh.lhfield
@d kchar_type(#)==font_info[ctype_base[#]+kchar_type_end
@z

@x [30.557] l.11413 - pTeX: glue_kern_start
@d lig_kern_start(#)==lig_kern_base[#]+rem_byte {beginning of lig/kern program}
@d lig_kern_restart_end(#)==256*op_byte(#)+rem_byte(#)+32768-kern_base_offset
@d lig_kern_restart(#)==lig_kern_base[#]+lig_kern_restart_end
@y
@d lig_kern_start(#)==lig_kern_base[#]+rem_byte {beginning of lig/kern program}
@d lig_kern_restart_end(#)==256*op_byte(#)+rem_byte(#)+32768-kern_base_offset
@d lig_kern_restart(#)==lig_kern_base[#]+lig_kern_restart_end
@d glue_kern_start(#)==lig_kern_base[#]+rem_byte {beginning of glue/kern program}
@d glue_kern_restart_end(#)==256*op_byte(#)+rem_byte(#)+32768-kern_base_offset
@d glue_kern_restart(#)==lig_kern_base[#]+glue_kern_restart_end
@z

@x [30.560] l.11457 - pTeX: jfm_flag, jfm_id, nt, cx
var k:font_index; {index into |font_info|}
@y
var k:font_index; {index into |font_info|}
@!jfm_flag:dir_default..dir_tate; {direction of the \.{JFM}}
@!nt:halfword; {number of the |char_type| tables}
@!cx:KANJI_code; {kanji code}
@z

@x
@d read_sixteen(#)==begin #:=fbyte;
  if #>127 then abort;
  fget; #:=#*@'400+fbyte;
  end
@y
@d read_sixteen(#)==begin #:=fbyte;
  if #>127 then abort;
  fget; #:=#*@'400+fbyte;
  end
@d read_twentyfourx(#)==begin #:=fbyte;
  fget; #:=#*@"100+fbyte;
  fget; #:=#+fbyte*@"10000;
  end
@z

@x [30.565] l.11548 - pTeX: read tfm size
@ @<Read the {\.{TFM}} size fields@>=
begin read_sixteen(lf);
fget; read_sixteen(lh);
fget; read_sixteen(bc);
fget; read_sixteen(ec);
if (bc>ec+1)or(ec>255) then abort;
if bc>255 then {|bc=256| and |ec=255|}
  begin bc:=1; ec:=0;
  end;
fget; read_sixteen(nw);
fget; read_sixteen(nh);
fget; read_sixteen(nd);
fget; read_sixteen(ni);
fget; read_sixteen(nl);
fget; read_sixteen(nk);
fget; read_sixteen(ne);
fget; read_sixteen(np);
if lf<>6+lh+(ec-bc+1)+nw+nh+nd+ni+nl+nk+ne+np then abort;
if (nw=0)or(nh=0)or(nd=0)or(ni=0) then abort;
end
@y
@ @<Read the {\.{TFM}} size fields@>=
begin read_sixteen(lf);
fget; read_sixteen(lh);
if lf=yoko_jfm_id then
  begin jfm_flag:=dir_yoko; nt:=lh;
  fget; read_sixteen(lf);
  fget; read_sixteen(lh);
  end
else if lf=tate_jfm_id then
  begin jfm_flag:=dir_tate; nt:=lh;
  fget; read_sixteen(lf);
  fget; read_sixteen(lh);
  end
else begin jfm_flag:=dir_default; nt:=0;
  end;
fget; read_sixteen(bc);
fget; read_sixteen(ec);
if (bc>ec+1)or(ec>255) then abort;
if bc>255 then {|bc=256| and |ec=255|}
  begin bc:=1; ec:=0;
  end;
fget; read_sixteen(nw);
fget; read_sixteen(nh);
fget; read_sixteen(nd);
fget; read_sixteen(ni);
fget; read_sixteen(nl);
fget; read_sixteen(nk);
fget; read_sixteen(ne);
fget; read_sixteen(np);
if jfm_flag<>dir_default then
  begin if lf<>7+lh+nt+(ec-bc+1)+nw+nh+nd+ni+nl+nk+ne+np then abort;
  end
else
  begin if lf<>6+lh+(ec-bc+1)+nw+nh+nd+ni+nl+nk+ne+np then abort;
  end;
if (nw=0)or(nh=0)or(nd=0)or(ni=0) then abort;
end
@z

@x [30.566] l.11574 - pTeX: set font_dir & font_num_ext
@<Use size fields to allocate font information@>=
lf:=lf-6-lh; {|lf| words should be loaded into |font_info|}
if np<7 then lf:=lf+7-np; {at least seven parameters will appear}
if (font_ptr=font_max)or(fmem_ptr+lf>font_mem_size) then
  @<Apologize for not loading the font, |goto done|@>;
f:=font_ptr+1;
char_base[f]:=fmem_ptr-bc;
width_base[f]:=char_base[f]+ec+1;
height_base[f]:=width_base[f]+nw;
depth_base[f]:=height_base[f]+nh;
italic_base[f]:=depth_base[f]+nd;
lig_kern_base[f]:=italic_base[f]+ni;
kern_base[f]:=lig_kern_base[f]+nl-kern_base_offset;
exten_base[f]:=kern_base[f]+kern_base_offset+nk;
param_base[f]:=exten_base[f]+ne
@y
@<Use size fields to allocate font information@>=
if jfm_flag<>dir_default then
  lf:=lf-7-lh  {If \.{JFM}, |lf| holds more two-16bit records than \.{TFM}}
else
  lf:=lf-6-lh; {|lf| words should be loaded into |font_info|}
if np<7 then lf:=lf+7-np; {at least seven parameters will appear}
if (font_ptr=font_max)or(fmem_ptr+lf>font_mem_size) then
  @<Apologize for not loading the font, |goto done|@>;
f:=font_ptr+1;
font_dir[f]:=jfm_flag;
font_num_ext[f]:=nt;
ctype_base[f]:=fmem_ptr;
char_base[f]:=ctype_base[f]+nt-bc;
width_base[f]:=char_base[f]+ec+1;
height_base[f]:=width_base[f]+nw;
depth_base[f]:=height_base[f]+nh;
italic_base[f]:=depth_base[f]+nd;
lig_kern_base[f]:=italic_base[f]+ni;
kern_base[f]:=lig_kern_base[f]+nl-kern_base_offset;
exten_base[f]:=kern_base[f]+kern_base_offset+nk;
param_base[f]:=exten_base[f]+ne;
@z

@x [30.569] l.11619 - pTeX: read char_type
@ @<Read character data@>=
for k:=fmem_ptr to width_base[f]-1 do
  begin store_four_quarters(font_info[k].qqqq);
@y
@ @<Read character data@>=
if jfm_flag<>dir_default then
  for k:=ctype_base[f] to ctype_base[f]+nt-1 do
    begin
    fget; read_twentyfourx(cx); font_info[k].hh.rh:=tokanji(cx); {|kchar_code|}
    fget; cx:=fbyte; font_info[k].hh.lhfield:=tonum(cx); {|kchar_type|}
    end;
for k:=char_base[f]+bc to width_base[f]-1 do
  begin store_four_quarters(font_info[k].qqqq);
@z

@x [30.570] l.11638 - pTeX:
@d current_character_being_worked_on==k+bc-fmem_ptr
@y
@d current_character_being_worked_on==k-char_base[f]
@z

@x [30.573] l.11704 - pTeX: jfm
    if a>128 then
      begin if 256*c+d>=nl then abort;
      if a=255 then if k=lig_kern_base[f] then bchar:=b;
      end
    else begin if b<>bchar then check_existence(b);
      if c<128 then check_existence(d) {check ligature}
      else if 256*(c-128)+d>=nk then abort; {check kern}
      if a<128 then if k-lig_kern_base[f]+a+1>=nl then abort;
      end;
    end;
@y
    if a>128 then
      begin if 256*c+d>=nl then abort;
      if a=255 then if k=lig_kern_base[f] then bchar:=b;
      end
    else begin if b<>bchar then check_existence(b);
      if c<128 then begin
          if jfm_flag<>dir_default then begin if d>=ne then abort; end
        else check_existence(d); {check ligature}
      end else if 256*(c-128)+d>=nk then abort; {check kern}
      if a<128 then if k-lig_kern_base[f]+a+1>=nl then abort;
      end;
    end;
@z

@x [30.574] l.11720 - pTeX: read jfm exten
for k:=exten_base[f] to param_base[f]-1 do
  begin store_four_quarters(font_info[k].qqqq);
@y
if jfm_flag<>dir_default then
  for k:=exten_base[f] to param_base[f]-1 do
    store_scaled(font_info[k].sc) {NOTE: this area subst for glue program}
else for k:=exten_base[f] to param_base[f]-1 do
  begin store_four_quarters(font_info[k].qqqq);
@z

@x [30.576] l.11765 - pTeX: adjust ctype_base
adjust(char_base); adjust(width_base); adjust(lig_kern_base);
@y
adjust(ctype_base);
adjust(char_base); adjust(width_base); adjust(lig_kern_base);
@z

@x [30.577] l.11778 - pTeX: jfont, tfont
if cur_cmd=def_font then f:=cur_font
@y
if cur_cmd=def_jfont then f:=cur_jfont
else if cur_cmd=def_tfont then f:=cur_tfont
else if cur_cmd=def_font then f:=cur_font
@z

@x [30.581]
@p procedure char_warning(@!f:internal_font_number;@!c:eight_bits);
@y
@d print_lc_hex(#)==l:=#;
  if l<10 then print_char(l+"0")@+else print_char(l-10+"a")

@p procedure char_warning(@!f:internal_font_number;@!c:eight_bits);
var @!l:0..255; {small indices or counters}
@z
@x [30.581]
  print_ASCII(c); print(" in font ");
@y
  if (c<" ")or(c>"~") then
    begin print_char("^"); print_char("^");
    if c<64 then print_char(c+64)
    else if c<128 then print_char(c-64)
    else begin print_lc_hex(c div 16);  print_lc_hex(c mod 16); end
    end
  else print_ASCII(c);
  print(" in font ");
@z

@x [31.586] l.12189 - pTeX: define set2
@d set1=128 {typeset a character and move right}
@y
@d set1=128 {typeset a character and move right}
@d set2=129 {typeset a character and move right}
@z
@x [31.586] l.12214 - pTeX: define dirchg
@d post_post=249 {postamble ending}
@y
@d post_post=249 {postamble ending}
@d dirchg=255 {direction change}
@z

@x [31.587] l.12246 - pTeX: ex_id_byte
@d id_byte=2 {identifies the kind of \.{DVI} files described here}
@y
@d id_byte=2 {identifies the kind of \.{DVI} files described here}
@d ex_id_byte=3 {identifies the kind of extended \.{DVI} files}
@z

@x [32.590] l.12329 - pTeX: ex_id_byte: This dvi is extended!
@ The last part of the postamble, following the |post_post| byte that
signifies the end of the font definitions, contains |q|, a pointer to the
|post| command that started the postamble.  An identification byte, |i|,
comes next; this currently equals~2, as in the preamble.
@y
@ The last part of the postamble, following the |post_post| byte that
signifies the end of the font definitions, contains |q|, a pointer to the
|post| command that started the postamble.  An identification byte, |i|,
comes next; this equals~2 or~3. If \pTeX\ primitives are not used then the
identification byte equals~2, othercase this is set to~3.
@z

@x [32.592] l.12405 - pTeX:
 {character and font in current |char_node|}
@!c:quarterword;
@!f:internal_font_number;
@y
 {character and font in current |char_node|}
@!c:quarterword;
@!f:internal_font_number;
@!dir_used:boolean; {Is this dvi extended?}
@z

@x [32.593] l.12414 - pTeX: dir_used: Is this dvi extended?
doing_leaders:=false; dead_cycles:=0; cur_s:=-1;
@y
doing_leaders:=false; dead_cycles:=0; cur_s:=-1; dir_used:=false;
@z

@x [32.617] l.12846 - pTeX: Initialize dvi_dir as shipout begins
dvi_h:=0; dvi_v:=0; cur_h:=h_offset; dvi_f:=null_font;
@y
dvi_h:=0; dvi_v:=0; cur_h:=h_offset; dvi_f:=null_font;
dvi_dir:=dir_yoko; cur_dir_hv:=dvi_dir;
@z

@x [32.619] l.12892 - pTeX: hlist_out Kanji, disp_node
procedure hlist_out; {output an |hlist_node| box}
label reswitch, move_past, fin_rule, next_p, continue, found;
var base_line: scaled; {the baseline coordinate for this box}
@y
procedure hlist_out; {output an |hlist_node| box}
label reswitch, move_past, fin_rule, next_p, continue, found;
var base_line: scaled; {the baseline coordinate for this box}
@!disp: scaled; {displacement}
@!save_dir:eight_bits; {what |dvi_dir| should pop to}
@!jc:KANJI_code; {temporary register for KANJI codes}
@!ksp_ptr:pointer; {position of |auto_spacing_glue| in the hlist}
@z
@x [32.619] l.12913 - pTeX: hlist_out Kanji, disp_node
incr(cur_s);
if cur_s>0 then dvi_out(push);
if cur_s>max_push then max_push:=cur_s;
save_loc:=dvi_offset+dvi_ptr; base_line:=cur_v; left_edge:=cur_h;
@y
ksp_ptr:=space_ptr(this_box);
incr(cur_s);
if cur_s>0 then dvi_out(push);
if cur_s>max_push then max_push:=cur_s;
save_loc:=dvi_offset+dvi_ptr;
synch_dir;
base_line:=cur_v; left_edge:=cur_h; disp:=0;
@z

@x [32.622] l.12945 - pTeX: chain
@<Output node |p| for |hlist_out|...@>=
reswitch: if is_char_node(p) then
  begin synch_h; synch_v;
  repeat f:=font(p); c:=character(p);
  if f<>dvi_f then @<Change font |dvi_f| to |f|@>;
  if font_ec[f]>=qo(c) then if font_bc[f]<=qo(c) then
    if char_exists(orig_char_info(f)(c)) then  {N.B.: not |char_info|}
      begin if c>=qi(128) then dvi_out(set1);
      dvi_out(qo(c));@/
      cur_h:=cur_h+char_width(f)(orig_char_info(f)(c));
      goto continue;
      end;
  if mltex_enabled_p then
    @<Output a substitution, |goto continue| if not possible@>;
continue:
  p:=link(p);
  until not is_char_node(p);
  dvi_h:=cur_h;
  end
else @<Output the non-|char_node| |p| for |hlist_out|
    and move to the next node@>
@y
@<Output node |p| for |hlist_out|...@>=
reswitch: if is_char_node(p) then
  begin synch_h; synch_v;
  chain:=false;
  repeat f:=font(p); c:=character(p);
  if f<>dvi_f then @<Change font |dvi_f| to |f|@>;
  if font_dir[f]=dir_default then
    begin chain:=false;
    if font_ec[f]>=qo(c) then if font_bc[f]<=qo(c) then
      if char_exists(orig_char_info(f)(c)) then  {N.B.: not |char_info|}
        begin if c>=qi(128) then dvi_out(set1);
        dvi_out(qo(c));@/
        cur_h:=cur_h+char_width(f)(orig_char_info(f)(c));
        goto continue;
        end;
    if mltex_enabled_p then
      @<Output a substitution, |goto continue| if not possible@>;
continue:
    end
  else
    begin if chain=false then chain:=true
    else begin cur_h:=cur_h+width(ksp_ptr);
      if g_sign<>normal then
        begin  if g_sign=stretching then
          begin  if stretch_order(ksp_ptr)=g_order then
            cur_h:=cur_h+round(float(glue_set(this_box))*stretch(ksp_ptr));
@^real multiplication@>
          end
        else
          begin  if shrink_order(ksp_ptr)=g_order then
            cur_h:=cur_h-round(float(glue_set(this_box))*shrink(ksp_ptr));
@^real multiplication@>
          end;
        end;
      synch_h;
      end;
    p:=link(p);
	jc:=toDVI(KANJI(info(p)));
    dvi_out(set2); dvi_out(Hi(jc)); dvi_out(Lo(jc));
    cur_h:=cur_h+char_width(f)(orig_char_info(f)(c)); {not |jc|}
    end;
  dvi_h:=cur_h; p:=link(p);
  until not is_char_node(p);
  chain:=false;
  end
else @<Output the non-|char_node| |p| for |hlist_out|
    and move to the next node@>
@z

@x [32.623] l.12982 - pTeX: disp_node, dir_node
@ @<Output the non-|char_node| |p| for |hlist_out|...@>=
begin case type(p) of
hlist_node,vlist_node:@<Output a box in an hlist@>;
rule_node: begin rule_ht:=height(p); rule_dp:=depth(p); rule_wd:=width(p);
  goto fin_rule;
  end;
whatsit_node: @<Output the whatsit node |p| in an hlist@>;
@y
@ @<Output the non-|char_node| |p| for |hlist_out|...@>=
begin case type(p) of
hlist_node,vlist_node,dir_node:@<Output a box in an hlist@>;
rule_node: begin rule_ht:=height(p); rule_dp:=depth(p); rule_wd:=width(p);
  goto fin_rule;
  end;
whatsit_node: @<Output the whatsit node |p| in an hlist@>;
disp_node: begin disp:=disp_dimen(p); cur_v:=base_line+disp; end;
@z

@x [32.624] l.13000 - pTeX: output a box(and dir_node) with disp
@ @<Output a box in an hlist@>=
if list_ptr(p)=null then cur_h:=cur_h+width(p)
else  begin save_h:=dvi_h; save_v:=dvi_v;
  cur_v:=base_line+shift_amount(p); {shift the box down}
@y
@ @<Output a box in an hlist@>=
if list_ptr(p)=null then cur_h:=cur_h+width(p)
else  begin save_h:=dvi_h; save_v:=dvi_v; save_dir:=dvi_dir;
  cur_v:=base_line+disp+shift_amount(p); {shift the box down}
@z
@x [32.624] l.13005 - pTeX: output a box(and dir_node) with disp
  if type(p)=vlist_node then vlist_out@+else hlist_out;
  dvi_h:=save_h; dvi_v:=save_v;
  cur_h:=edge+width(p); cur_v:=base_line;
  end
@y
  case type(p) of
    hlist_node:hlist_out;
    vlist_node:vlist_out;
    dir_node:dir_out;
  endcases;
  dvi_h:=save_h; dvi_v:=save_v; dvi_dir:=save_dir;
  cur_h:=edge+width(p); cur_v:=base_line+disp; cur_dir_hv:=save_dir;
  end
@z

@x [32.625] l.13010 - pTeX: Output a rule with disp
@ @<Output a rule in an hlist@>=
if is_running(rule_ht) then rule_ht:=height(this_box);
if is_running(rule_dp) then rule_dp:=depth(this_box);
@y
@ @<Output a rule in an hlist@>=
if is_running(rule_ht) then rule_ht:=height(this_box)+disp;
if is_running(rule_dp) then rule_dp:=depth(this_box)-disp;
@z

@x [32.629] l.13103 - pTeX: Output a leader box(and dir_node) with disp
@<Output a leader box at |cur_h|, ...@>=
begin cur_v:=base_line+shift_amount(leader_box); synch_v; save_v:=dvi_v;@/
synch_h; save_h:=dvi_h; temp_ptr:=leader_box;
@y
@<Output a leader box at |cur_h|, ...@>=
begin cur_v:=base_line+disp+shift_amount(leader_box); synch_v; save_v:=dvi_v;@/
synch_h; save_h:=dvi_h; save_dir:=dvi_dir; temp_ptr:=leader_box;
@z
@x [32.629] l.13107 - pTeX: Output a leader box(and dir_node) with disp
if type(leader_box)=vlist_node then vlist_out@+else hlist_out;
doing_leaders:=outer_doing_leaders;
dvi_v:=save_v; dvi_h:=save_h; cur_v:=base_line;
cur_h:=save_h+leader_wd+lx;
end
@y
case type(leader_box) of
  hlist_node:hlist_out;
  vlist_node:vlist_out;
  dir_node:dir_out;
endcases;
doing_leaders:=outer_doing_leaders;
dvi_v:=save_v; dvi_h:=save_h; dvi_dir:=save_dir;
cur_v:=base_line; cur_h:=save_h+leader_wd+lx; cur_dir_hv:=save_dir;
end
@z

@x [32.630] l.13133 - pTeX: vlist_out
begin cur_g:=0; cur_glue:=float_constant(0);
this_box:=temp_ptr; g_order:=glue_order(this_box);
g_sign:=glue_sign(this_box); p:=list_ptr(this_box);
incr(cur_s);
if cur_s>0 then dvi_out(push);
if cur_s>max_push then max_push:=cur_s;
save_loc:=dvi_offset+dvi_ptr; left_edge:=cur_h; cur_v:=cur_v-height(this_box);
@y
@!save_dir:integer; {what |dvi_dir| should pop to}
begin cur_g:=0; cur_glue:=float_constant(0);
this_box:=temp_ptr; g_order:=glue_order(this_box);
g_sign:=glue_sign(this_box); p:=list_ptr(this_box);
incr(cur_s);
if cur_s>0 then dvi_out(push);
if cur_s>max_push then max_push:=cur_s;
save_loc:=dvi_offset+dvi_ptr;
synch_dir;
left_edge:=cur_h; cur_v:=cur_v-height(this_box);
@z

@x [32.632] l.13155 - pTeX: output non-char-node
@ @<Output the non-|char_node| |p| for |vlist_out|@>=
begin case type(p) of
hlist_node,vlist_node:@<Output a box in a vlist@>;
rule_node: begin rule_ht:=height(p); rule_dp:=depth(p); rule_wd:=width(p);
  goto fin_rule;
  end;
@y
@ @<Output the non-|char_node| |p| for |vlist_out|@>=
begin case type(p) of
hlist_node,vlist_node,dir_node: @<Output a box in a vlist@>;
rule_node: begin rule_ht:=height(p); rule_dp:=depth(p); rule_wd:=width(p);
  goto fin_rule;
  end;
@z

@x [32.633] l.13175 - pTeX: Output a box in a vlist
@<Output a box in a vlist@>=
if list_ptr(p)=null then cur_v:=cur_v+height(p)+depth(p)
else  begin cur_v:=cur_v+height(p); synch_v;
  save_h:=dvi_h; save_v:=dvi_v;
@y
@<Output a box in a vlist@>=
if list_ptr(p)=null then cur_v:=cur_v+height(p)+depth(p)
else begin cur_v:=cur_v+height(p); synch_v;
  save_h:=dvi_h; save_v:=dvi_v; save_dir:=dvi_dir;
@z
@x [32.633] l.13181 - pTeX: Output a box in a vlist
  if type(p)=vlist_node then vlist_out@+else hlist_out;
  dvi_h:=save_h; dvi_v:=save_v;
  cur_v:=save_v+depth(p); cur_h:=left_edge;
  end
@y
  case type(p) of
    hlist_node:hlist_out;
    vlist_node:vlist_out;
    dir_node:dir_out;
  endcases;
  dvi_h:=save_h; dvi_v:=save_v; dvi_dir:=save_dir;
  cur_v:=save_v+depth(p); cur_h:=left_edge; cur_dir_hv:=save_dir;
  end
@z

@x [32.637] l.13256 - pTeX: Output a leader in a vlist
@<Output a leader box at |cur_v|, ...@>=
@y
@<Output a leader box at |cur_v|, ...@>=
@z
@x [32.637] l.13258 - pTeX: Output a leader in a vlist
cur_v:=cur_v+height(leader_box); synch_v; save_v:=dvi_v;
temp_ptr:=leader_box;
outer_doing_leaders:=doing_leaders; doing_leaders:=true;
if type(leader_box)=vlist_node then vlist_out@+else hlist_out;
doing_leaders:=outer_doing_leaders;
dvi_v:=save_v; dvi_h:=save_h; cur_h:=left_edge;
cur_v:=save_v-height(leader_box)+leader_ht+lx;
end
@y
cur_v:=cur_v+height(leader_box); synch_v; save_v:=dvi_v; save_dir:=dvi_dir;
temp_ptr:=leader_box;
outer_doing_leaders:=doing_leaders; doing_leaders:=true;
case type(leader_box) of
  hlist_node:hlist_out;
  vlist_node:vlist_out;
  dir_node:dir_out;
endcases;
doing_leaders:=outer_doing_leaders;
dvi_v:=save_v; dvi_h:=save_h; dvi_dir:=save_dir;
cur_h:=left_edge; cur_v:=save_v-height(leader_box)+leader_ht+lx;
cur_dir_hv:=save_dir;
end
@z

@x [32.638] l.13270 - pTeX: ship out
@p procedure ship_out(@!p:pointer); {output the box |p|}
label done;
var page_loc:integer; {location of the current |bop|}
@y
@p procedure ship_out(@!p:pointer); {output the box |p|}
label done;
var page_loc:integer; {location of the current |bop|}
@!del_node:pointer; {used when delete the |dir_node| continued box}
@z
@x [32.640] l.13294 - pTeX: ship out
@<Ship box |p| out@>;
@y
if type(p)=dir_node then
  begin del_node:=p; p:=list_ptr(p);
  delete_glue_ref(space_ptr(del_node));
  delete_glue_ref(xspace_ptr(del_node));
  free_node(del_node,box_node_size);
  end;
flush_node_list(link(p)); link(p):=null;
if abs(box_dir(p))<>dir_yoko then p:=new_dir_node(p,dir_yoko);
@<Ship box |p| out@>;
@z

@x [32.641] l.13327 - pTeX: dir_node
if type(p)=vlist_node then vlist_out@+else hlist_out;
@y
case type(p) of
  hlist_node:hlist_out;
  vlist_node:vlist_out;
  dir_node:dir_out;
endcases;
@z

@x [33.642] l.13394 - pTeX: postamble's id_byte
  @<Output the font definitions for all fonts that were used@>;
  dvi_out(post_post); dvi_four(last_bop); dvi_out(id_byte);@/
@y
  @<Output the font definitions for all fonts that were used@>;
  dvi_out(post_post); dvi_four(last_bop);
  if dir_used then dvi_out(ex_id_byte) else dvi_out(id_byte);@/
@z

@x [33.647] l.13515 - pTeX: cur_kanji_skip, cur_xkanji_skip, last_disp
@< Glob...@>=
@!adjust_tail:pointer; {tail of adjustment list}
@y
@< Glob...@>=
@!adjust_tail:pointer; {tail of adjustment list}
@!last_disp:scaled; {displacement at end of list}
@!cur_kanji_skip:pointer;
@!cur_xkanji_skip:pointer;
@z

@x [33.648] l.13518 - pTeX: cur_kanji_skip, cur_xkanji_skip
@ @<Set init...@>=adjust_tail:=null; last_badness:=0;
@y
@ @<Set init...@>=adjust_tail:=null; last_badness:=0;
  cur_kanji_skip:=zero_glue; cur_xkanji_skip:=zero_glue;
{ koko
  |incr(glue_ref_count(cur_kanji_skip));|
  |incr(glue_ref_count(cur_xkanji_skip));|
}
@z

@x [33.649] l.13522 - pTeX: hpack
@p function hpack(@!p:pointer;@!w:scaled;@!m:small_number):pointer;
label reswitch, common_ending, exit;
var r:pointer; {the box node that will be returned}
@y
@p function hpack(@!p:pointer;@!w:scaled;@!m:small_number):pointer;
label reswitch, common_ending, exit;
var r:pointer; {the box node that will be returned}
@!k:pointer; {points to a |kanji_space| specification}
@!disp:scaled; {displacement}
@z

@x [33.649] l.13535 - pTeX: hpack
q:=r+list_offset; link(q):=p;@/
h:=0; @<Clear dimensions to zero@>;
@y
set_box_dir(r)(dir_default);
space_ptr(r):=cur_kanji_skip; xspace_ptr(r):=cur_xkanji_skip;
add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
k:=cur_kanji_skip;
q:=r+list_offset; link(q):=p;@/
h:=0; @<Clear dimensions to zero@>;
disp:=0;
@z
@x [33.649] l.13537 - pTeX: hpack
while p<>null do @<Examine node |p| in the hlist, taking account of its effect
  on the dimensions of the new box, or moving it to the adjustment list;
  then advance |p| to the next node@>;
if adjust_tail<>null then link(adjust_tail):=null;
height(r):=h; depth(r):=d;@/
@<Determine the value of |width(r)| and the appropriate glue setting;
  then |return| or |goto common_ending|@>;
common_ending: @<Finish issuing a diagnostic message
      for an overfull or underfull hbox@>;
exit: hpack:=r;
end;
@y
while p<>null do @<Examine node |p| in the hlist, taking account of its effect
  on the dimensions of the new box, or moving it to the adjustment list;
  then advance |p| to the next node@>;
if adjust_tail<>null then link(adjust_tail):=null;
height(r):=h; depth(r):=d;@/
@<Determine the value of |width(r)| and the appropriate glue setting;
  then |return| or |goto common_ending|@>;
common_ending:
  @<Finish issuing a diagnostic message for an overfull or underfull hbox@>;
exit: last_disp:=disp; hpack:=r;
end;
@z

@x [33.651] l.13556 - pTeX: dir_node, disp_node, reset chain
@ @<Examine node |p| in the hlist, taking account of its effect...@>=
@^inner loop@>
begin reswitch: while is_char_node(p) do
  @<Incorporate character dimensions into the dimensions of
    the hbox that will contain~it, then move to the next node@>;
if p<>null then
  begin case type(p) of
  hlist_node,vlist_node,rule_node,unset_node:
    @<Incorporate box dimensions into the dimensions of
      the hbox that will contain~it@>;
  ins_node,mark_node,adjust_node: if adjust_tail<>null then
    @<Transfer node |p| to the adjustment list@>;
  whatsit_node:@<Incorporate a whatsit node into an hbox@>;
@y
@ @<Examine node |p| in the hlist, taking account of its effect...@>=
@^inner loop@>
begin reswitch: chain:=false;
while is_char_node(p) do
  @<Incorporate character dimensions into the dimensions of
    the hbox that will contain~it, then move to the next node@>;
if p<>null then
  begin case type(p) of
  hlist_node,vlist_node,dir_node,rule_node,unset_node:
    @<Incorporate box dimensions into the dimensions of
      the hbox that will contain~it@>;
  ins_node,mark_node,adjust_node:
    if adjust_tail<>null then @<Transfer node |p| to the adjustment list@>;
  whatsit_node:@<Incorporate a whatsit node into an hbox@>;
  disp_node:disp:=disp_dimen(p);
@z

@x [33.653] l.13589 - pTeX: displacement
@<Incorporate box dimensions into the dimensions of the hbox...@>=
begin x:=x+width(p);
if type(p)>=rule_node then s:=0 @+else s:=shift_amount(p);
if height(p)-s>h then h:=height(p)-s;
if depth(p)+s>d then d:=depth(p)+s;
end
@y
@<Incorporate box dimensions into the dimensions of the hbox...@>=
begin x:=x+width(p);
if type(p)>=rule_node then s:=disp @+else s:=shift_amount(p)+disp;
if height(p)-s>h then h:=height(p)-s;
if depth(p)+s>d then d:=depth(p)+s;
end
@z

@x [33.654] l.13601 - pTeX: auto spacing, displacement
@<Incorporate character dimensions into the dimensions of the hbox...@>=
begin f:=font(p); i:=char_info(f)(character(p)); hd:=height_depth(i);
x:=x+char_width(f)(i);@/
s:=char_height(f)(hd);@+if s>h then h:=s;
s:=char_depth(f)(hd);@+if s>d then d:=s;
p:=link(p);
end
@y
@<Incorporate character dimensions into the dimensions of the hbox...@>=
begin f:=font(p); i:=char_info(f)(character(p)); hd:=height_depth(i);
x:=x+char_width(f)(i);@/
s:=char_height(f)(hd)-disp; if s>h then h:=s;
s:=char_depth(f)(hd)+disp; if s>d then d:=s;
if font_dir[f]<>dir_default then
  begin p:=link(p);
  if chain then
    begin x:=x+width(k);@/
    o:=stretch_order(k); total_stretch[o]:=total_stretch[o]+stretch(k);
    o:=shrink_order(k); total_shrink[o]:=total_shrink[o]+shrink(k);
    end
  else chain:=true;
  end
else chain:=false;
p:=link(p);
end
@z

@x [33.668] l.13779 - pTeX: vpackage
begin last_badness:=0; r:=get_node(box_node_size); type(r):=vlist_node;
subtype(r):=min_quarterword; shift_amount(r):=0;
@y
begin last_badness:=0; r:=get_node(box_node_size); type(r):=vlist_node;
subtype(r):=min_quarterword; shift_amount(r):=0; set_box_dir(r)(dir_default);
space_ptr(r):=zero_glue; xspace_ptr(r):=zero_glue;
add_glue_ref(zero_glue); add_glue_ref(zero_glue);
@z

@x [33.669] l.13797 - pTeX: dir_node
@ @<Examine node |p| in the vlist, taking account of its effect...@>=
begin if is_char_node(p) then confusion("vpack")
@:this can't happen vpack}{\quad vpack@>
else  case type(p) of
  hlist_node,vlist_node,rule_node,unset_node:
    @<Incorporate box dimensions into the dimensions of
      the vbox that will contain~it@>;
@y
@ @<Examine node |p| in the vlist, taking account of its effect...@>=
begin if is_char_node(p) then confusion("vpack")
@:this can't happen vpack}{\quad vpack@>
else  case type(p) of
  hlist_node,vlist_node,dir_node,rule_node,unset_node:
    @<Incorporate box dimensions into the dimensions of
      the vbox that will contain~it@>;
@z

@x [34.681] l.14026 - pTeX: math noad
@d noad_size=4 {number of words in a normal noad}
@d nucleus(#)==#+1 {the |nucleus| field of a noad}
@d supscr(#)==#+2 {the |supscr| field of a noad}
@d subscr(#)==#+3 {the |subscr| field of a noad}
@y
\yskip\hang In Japanese, |math_type(q)=math_jchar| means that |fam(q)|
refers to one of the sixteen kanji font families, and |KANJI(q)| is the
internal kanji code number.
@^Japanese extentions@>

@d noad_size=5 {number of words in a normal noad}
@d nucleus(#)==#+1 {the |nucleus| field of a noad}
@d supscr(#)==#+2 {the |supscr| field of a noad}
@d subscr(#)==#+3 {the |subscr| field of a noad}
@d kcode_noad(#)==#+4
@d math_kcode(#)==info(#+4) {the |kanji character| field of a noad}
@d kcode_noad_nucleus(#)==#+3
@d math_kcode_nucleus(#)==info(#+3)
	{the |kanji character| field offset from nucleus}
@#
@d math_jchar=6
@d math_text_jchar=7
@z

@x [35.681] pTeX: explicit box in math mode
@d math_char=1 {|math_type| when the attribute is simple}
@d sub_box=2 {|math_type| when the attribute is a box}
@d sub_mlist=3 {|math_type| when the attribute is a formula}
@d math_text_char=4 {|math_type| when italic correction is dubious}
@y
@d math_char=1 {|math_type| when the attribute is simple}
@d sub_box=2 {|math_type| when the attribute is a box}
@d sub_exp_box=3 {|math_type| when the attribute is an explicit created box}
@d sub_mlist=4 {|math_type| when the attribute is a formula}
@d math_text_char=5 {|math_type| when italic correction is dubious}

@<Initialize table entries...@>=
text_baseline_shift_factor:=1000;
script_baseline_shift_factor:=700;
scriptscript_baseline_shift_factor:=500;

@z


@x [34.683] radical with japanese char
@d left_delimiter(#)==#+4 {first delimiter field of a noad}
@d right_delimiter(#)==#+5 {second delimiter field of a fraction noad}
@d radical_noad=inner_noad+1 {|type| of a noad for square roots}
@d radical_noad_size=5 {number of |mem| words in a radical noad}
@y
@d left_delimiter(#)==#+5 {first delimiter field of a noad}
@d right_delimiter(#)==#+4 {second delimiter field of a fraction noad}
@d radical_noad=inner_noad+1 {|type| of a noad for square roots}
@d radical_noad_size=6 {number of |mem| words in a radical noad}
@z

@x [34.686] l.14129 - pTeX: new_noad
mem[supscr(p)].hh:=empty_field;
new_noad:=p;
@y
mem[supscr(p)].hh:=empty_field;
mem[kcode_noad(p)].hh:=empty_field;
new_noad:=p;
@z

@x [34.687] accent with japanese char
@d accent_noad_size=5 {number of |mem| words in an accent noad}
@d accent_chr(#)==#+4 {the |accent_chr| field of an accent noad}
@y
@d accent_noad_size=6 {number of |mem| words in an accent noad}
@d accent_chr(#)==#+5 {the |accent_chr| field of an accent noad}
@z

@x [34.691] l.14236 - pTeX: print_fam_and_char
procedure print_fam_and_char(@!p:pointer); {prints family and character}
begin print_esc("fam"); print_int(fam(p)); print_char(" ");
print_ASCII(qo(character(p)));
@y
procedure print_fam_and_char(@!p:pointer;@!t:small_number);
					{prints family and character}
var @!cx:KANJI_code; {temporary register for KANJI}
begin print_esc("fam"); print_int(fam(p)); print_char(" ");
if t=math_char then print_ASCII(qo(character(p)))
else  begin KANJI(cx):=math_kcode_nucleus(p); print_kanji(cx);
  end;
@z

@x [34.692] l.14266 - pTeX: print_subsidiary_data
  math_char: begin print_ln; print_current_string; print_fam_and_char(p);
    end;
  sub_box: show_info; {recursive call}
@y
  math_char, math_jchar: begin print_ln; print_current_string;
    print_fam_and_char(p,math_type(p));
    end;
  sub_box, sub_exp_box: show_info; {recursive call}
@z

@x [34.696] l.14327 - pTeX: print_fam_and_char
accent_noad: begin print_esc("accent"); print_fam_and_char(accent_chr(p));
@y
accent_noad: begin print_esc("accent");
  print_fam_and_char(accent_chr(p),math_char);
@z

@x [35.698] pTeX: flush choice_node
  begin if math_type(nucleus(p))>=sub_box then
    flush_node_list(info(nucleus(p)));
  if math_type(supscr(p))>=sub_box then
    flush_node_list(info(supscr(p)));
  if math_type(subscr(p))>=sub_box then
    flush_node_list(info(subscr(p)));
@y
  begin if (math_type(nucleus(p))>=sub_box)
       and (math_type(nucleus(p))<>math_jchar)
       and (math_type(nucleus(p))<>math_text_jchar) then
    flush_node_list(info(nucleus(p)));
  if math_type(supscr(p))>=sub_box
       and (math_type(supscr(p))<>math_jchar)
       and (math_type(supscr(p))<>math_text_jchar) then
    flush_node_list(info(supscr(p)));
  if math_type(subscr(p))>=sub_box
       and (math_type(subscr(p))<>math_jchar)
       and (math_type(subscr(p))<>math_text_jchar) then
    flush_node_list(info(subscr(p)));
@z

@x [35.715] l.14687 - pTeX: rebox
  begin if type(b)=vlist_node then b:=hpack(b,natural);
  p:=list_ptr(b);
  if (is_char_node(p))and(link(p)=null) then
    begin f:=font(p); v:=char_width(f)(char_info(f)(character(p)));
    if v<>width(b) then link(p):=new_kern(width(b)-v);
    end;
@y
  begin if type(b)<>hlist_node then b:=hpack(b,natural);
  p:=list_ptr(b);
  if is_char_node(p) then
    if font_dir[font(p)]<>dir_default then
      begin if link(link(p))=null then
        begin f:=font(p); v:=char_width(f)(orig_char_info(f)(character(p)));
        if v<>width(b) then link(link(p)):=new_kern(width(b)-v);
        end
      end
    else if link(p)=null then
      begin f:=font(p); v:=char_width(f)(orig_char_info(f)(character(p)));
      if v<>width(b) then link(p):=new_kern(width(b)-v);
      end;
  delete_glue_ref(space_ptr(b)); delete_glue_ref(xspace_ptr(b));
@z

@x [36.720] l.14783 - pTeX: clean_box
function clean_box(@!p:pointer;@!s:small_number):pointer;
@y
function shift_sub_exp_box(@!q:pointer):pointer;
  { We assume that |math_type(q)=sub_exp_box| }
  var d: halfword; {displacement}
  begin
    if abs(direction)=abs(box_dir(info(q))) then begin
      if abs(direction)=dir_tate then begin
        if box_dir(info(q))=dir_tate then d:=t_baseline_shift
        else d:=y_baseline_shift end
      else d:=y_baseline_shift;
      if cur_style<script_style then 
        d:=xn_over_d(d,text_baseline_shift_factor, 1000)
      else if cur_style<script_script_style then 
        d:=xn_over_d(d,script_baseline_shift_factor, 1000)
      else
        d:=xn_over_d(d,scriptscript_baseline_shift_factor, 1000);
      shift_amount(info(q)):=shift_amount(info(q))-d;
    end;
    math_type(q):=sub_box;
    shift_sub_exp_box:=info(q);
  end;
function clean_box(@!p:pointer;@!s:small_number;@!jc:halfword):pointer;
@z

@x [36.720] l.14790 - pTeX: clean_box
math_char: begin cur_mlist:=new_noad; mem[nucleus(cur_mlist)]:=mem[p];
  end;
sub_box: begin q:=info(p); goto found;
  end;
@y
math_char: begin cur_mlist:=new_noad; mem[nucleus(cur_mlist)]:=mem[p];
  end;
math_jchar: begin cur_mlist:=new_noad; mem[nucleus(cur_mlist)]:=mem[p];
  math_kcode(cur_mlist):=jc;
  end;
sub_box: begin q:=info(p); goto found;
  end;
sub_exp_box: begin q:=shift_sub_exp_box(p); goto found;
  end;
@z

@x [36.720] l.14802 - pTeX: clean_box
found: if is_char_node(q)or(q=null) then x:=hpack(q,natural)
  else if (link(q)=null)and(type(q)<=vlist_node)and(shift_amount(q)=0) then
    x:=q {it's already clean}
  else x:=hpack(q,natural);
@y
found: if is_char_node(q)or(q=null) then x:=hpack(q,natural)
  else if (link(q)=null)and(type(q)<=dir_node)and(shift_amount(q)=0) then
    x:=q {it's already clean}
  else x:=hpack(q,natural);
@z

@x [36.721] l.14814 - pTeX: skip 2nd kanji node
if is_char_node(q) then
  begin r:=link(q);
@y
if is_char_node(q) then
  begin if font_dir[font(q)]<>dir_default then q:=link(q);
  r:=link(q);
@z

@x [36.722] l.14833 - pTeX: fetch
else  begin if (qo(cur_c)>=font_bc[cur_f])and(qo(cur_c)<=font_ec[cur_f]) then
    cur_i:=orig_char_info(cur_f)(cur_c)
  else cur_i:=null_character;
  if not(char_exists(cur_i)) then
    begin char_warning(cur_f,qo(cur_c));
    math_type(a):=empty;
    end;
  end;
@y
else  begin if font_dir[cur_f]<>dir_default then
    cur_c:=qi(get_jfm_pos(KANJI(math_kcode_nucleus(a)),cur_f));
  if (qo(cur_c)>=font_bc[cur_f])and(qo(cur_c)<=font_ec[cur_f]) then
    cur_i:=orig_char_info(cur_f)(cur_c)
  else cur_i:=null_character;
  if not(char_exists(cur_i)) then
    begin char_warning(cur_f,qo(cur_c));
    math_type(a):=empty;
    end;
  end;
@z

@x [36.726] l.14892 - pTeX: mlist_to_hlist
var mlist:pointer; {beginning of the given list}
@!penalties:boolean; {should penalty nodes be inserted?}
@!style:small_number; {the given style}
@y
var mlist:pointer; {beginning of the given list}
@!penalties:boolean; {should penalty nodes be inserted?}
@!style:small_number; {the given style}
@!u:pointer; {temporary register}
@z

@x [36.726] l.14913 - pTeX: mlist_to_hlist
@<Make a second pass over the mlist, removing all noads and inserting the
  proper spacing and penalties@>;
end;
@y
@<Make a second pass over the mlist, removing all noads and inserting the
  proper spacing and penalties@>;
p:=new_null_box; link(p):=link(temp_head);
adjust_hlist(p,false); link(temp_head):=link(p);
delete_glue_ref(space_ptr(p)); delete_glue_ref(xspace_ptr(p));
free_node(p,box_node_size);
end;
@z

@x [36.727] l.14928 - pTeX: free box
free_node(z,box_node_size);
@y
delete_glue_ref(space_ptr(z)); delete_glue_ref(xspace_ptr(z));
free_node(z,box_node_size);
@z

@x [36.730] l.14976 - pTeX: free box: disp_node
kern_node: begin math_kern(q,cur_mu); goto done_with_node;
  end;
@y
kern_node: begin math_kern(q,cur_mu); goto done_with_node;
  end;
disp_node: goto done_with_node;
@z

@x [36.734] l.15046 - pTeX: make_over:clean_box
  overbar(clean_box(nucleus(q),cramped_style(cur_style)),@|
@y
  overbar(clean_box(nucleus(q),cramped_style(cur_style),math_kcode(q)),@|
@z

@x [36.735] l.15055 - pTeX: make_under:clean_box
begin x:=clean_box(nucleus(q),cur_style);
@y
begin x:=clean_box(nucleus(q),cur_style,math_kcode(q));
@z

@x [36.736] l.15069 - pTeX: make_under:clean_box
if type(v)<>vlist_node then confusion("vcenter");
@y
if type(v)=dir_node then
  begin if type(list_ptr(v))<>vlist_node then confusion("dircenter")
  end
else  begin if type(v)<>vlist_node then confusion("vcenter")
  end;
@z

@x [36.737] l.15089 - pTeX: make_radical:clean_box
begin x:=clean_box(nucleus(q),cramped_style(cur_style));
@y
begin x:=clean_box(nucleus(q),cramped_style(cur_style),math_kcode(q));
@z

@x [36.738] l.15123 - pTeX: make_math_accent:clean_box
  x:=clean_box(nucleus(q),cramped_style(cur_style)); w:=width(x); h:=height(x);
@y
  x:=clean_box(nucleus(q),cramped_style(cur_style),math_kcode(q));
  w:=width(x); h:=height(x);
@z

@x [36.742] l.15186 - pTeX: make_math_accent:clean_box
x:=clean_box(nucleus(q),cur_style); delta:=delta+height(x)-h; h:=height(x);
@y
x:=clean_box(nucleus(q),cur_style,math_kcode(q));
delta:=delta+height(x)-h; h:=height(x);
@z

@x [36.744] l.15211 - pTeX: make_fraction:clean_box
x:=clean_box(numerator(q),num_style(cur_style));
z:=clean_box(denominator(q),denom_style(cur_style));
@y
x:=clean_box(numerator(q),num_style(cur_style),math_kcode(q));
z:=clean_box(denominator(q),denom_style(cur_style),math_kcode(q));
@z

@x [36.749] l.15304 - pTeX: make_op:clean_box
  delta:=char_italic(cur_f)(cur_i); x:=clean_box(nucleus(q),cur_style);
@y
  delta:=char_italic(cur_f)(cur_i);
  x:=clean_box(nucleus(q),cur_style,math_kcode(q));
@z

@x [36.750] l.15321 - pTeX: make_op:clean_box
begin x:=clean_box(supscr(q),sup_style(cur_style));
y:=clean_box(nucleus(q),cur_style);
z:=clean_box(subscr(q),sub_style(cur_style));
@y
begin x:=clean_box(supscr(q),sup_style(cur_style),math_kcode(q));
y:=clean_box(nucleus(q),cur_style,math_kcode(q));
z:=clean_box(subscr(q),sub_style(cur_style),math_kcode(q));
@z

@x [36.751] l.15342 - pTeX: free box node
  begin free_node(x,box_node_size); list_ptr(v):=y;
  end
@y
  begin
    delete_glue_ref(space_ptr(x)); delete_glue_ref(xspace_ptr(x));
    free_node(x,box_node_size); list_ptr(v):=y;
  end
@z

@x [36.751] l.15350 - pTeX: free box node
if math_type(subscr(q))=empty then free_node(z,box_node_size)
@y
if math_type(subscr(q))=empty then begin
  delete_glue_ref(space_ptr(z)); delete_glue_ref(xspace_ptr(z));
  free_node(z,box_node_size)
end
@z

@x [36.752] l.15369 - pTeX: make_ord
procedure make_ord(@!q:pointer);
label restart,exit;
var a:integer; {address of lig/kern instruction}
@!p,@!r:pointer; {temporary registers for list manipulation}
begin restart:@t@>@;@/
if math_type(subscr(q))=empty then if math_type(supscr(q))=empty then
 if math_type(nucleus(q))=math_char then
  begin p:=link(q);
  if p<>null then if (type(p)>=ord_noad)and(type(p)<=punct_noad) then
    if math_type(nucleus(p))=math_char then
    if fam(nucleus(p))=fam(nucleus(q)) then
      begin math_type(nucleus(q)):=math_text_char;
      fetch(nucleus(q));
      if char_tag(cur_i)=lig_tag then
        begin a:=lig_kern_start(cur_f)(cur_i);
        cur_c:=character(nucleus(p));
        cur_i:=font_info[a].qqqq;
        if skip_byte(cur_i)>stop_flag then
          begin a:=lig_kern_restart(cur_f)(cur_i);
          cur_i:=font_info[a].qqqq;
          end;
        loop@+ begin @<If instruction |cur_i| is a kern with |cur_c|, attach
            the kern after~|q|; or if it is a ligature with |cur_c|, combine
            noads |q| and~|p| appropriately; then |return| if the cursor has
            moved past a noad, or |goto restart|@>;
          if skip_byte(cur_i)>=stop_flag then return;
          a:=a+qo(skip_byte(cur_i))+1;
          cur_i:=font_info[a].qqqq;
          end;
        end;
      end;
  end;
exit:end;
@y
procedure make_ord(@!q:pointer);
label restart,exit;
var a:integer; {address of lig/kern instruction}
@!gp,@!gq,@!p,@!r:pointer; {temporary registers for list manipulation}
@!rr:halfword;
begin restart:@t@>@;@/
if (math_type(subscr(q))=empty)and(math_type(supscr(q))=empty)and@|
((math_type(nucleus(q))=math_char)or(math_type(nucleus(q))=math_jchar)) then
  begin p:=link(q);
  if p<>null then if (type(p)>=ord_noad)and(type(p)<=punct_noad) then
   if fam(nucleus(p))=fam(nucleus(q)) then
    if math_type(nucleus(p))=math_char then
      begin math_type(nucleus(q)):=math_text_char;
      fetch(nucleus(q));
      if char_tag(cur_i)=lig_tag then
        begin a:=lig_kern_start(cur_f)(cur_i);
        cur_c:=character(nucleus(p));
        cur_i:=font_info[a].qqqq;
        if skip_byte(cur_i)>stop_flag then
          begin a:=lig_kern_restart(cur_f)(cur_i);
          cur_i:=font_info[a].qqqq;
          end;
        loop@+ begin @<If instruction |cur_i| is a kern with |cur_c|, attach
            the kern after~|q|; or if it is a ligature with |cur_c|, combine
            noads |q| and~|p| appropriately; then |return| if the cursor has
            moved past a noad, or |goto restart|@>;
          if skip_byte(cur_i)>=stop_flag then return;
          a:=a+qo(skip_byte(cur_i))+1;
          cur_i:=font_info[a].qqqq;
          end;
        end;
      end
    else  if math_type(nucleus(p))=math_jchar then
      begin math_type(nucleus(q)):=math_text_jchar;
      fetch(nucleus(p)); a:=cur_c; fetch(nucleus(q));
      if char_tag(cur_i)=gk_tag then
        begin cur_c:=a; a:=glue_kern_start(cur_f)(cur_i);
        {|cur_c|:=qi(|get_jfm_pos|(|math_kcode|(p),
                   |fam_fnt|(fam(nucleus(p))+|cur_size|)));}
         cur_i:=font_info[a].qqqq;
         if skip_byte(cur_i)>stop_flag then {huge glue/kern table rearranged}
           begin a:=glue_kern_restart(cur_f)(cur_i);
           cur_i:=font_info[a].qqqq;
           end;
       loop@+ begin
         if next_char(cur_i)=cur_c then if skip_byte(cur_i)<=stop_flag then
         if op_byte(cur_i)<kern_flag then
           begin gp:=font_glue[cur_f]; rr:=rem_byte(cur_i);
           if gp<>null then begin
             while((type(gp)<>rr)and(link(gp)<>null)) do begin gp:=link(gp);
               end;
             gq:=glue_ptr(gp);
             end
           else begin gp:=get_node(small_node_size);
             font_glue[cur_f]:=gp; gq:=null;
             end;
           if gq=null then
             begin type(gp):=rr; gq:=new_spec(zero_glue); glue_ptr(gp):=gq;
             a:=exten_base[cur_f]+qi((qo(rr))*3); width(gq):=font_info[a].sc;
             stretch(gq):=font_info[a+1].sc; shrink(gq):=font_info[a+2].sc;
             add_glue_ref(gq); link(gp):=get_node(small_node_size);
             gp:=link(gp); glue_ptr(gp):=null; link(gp):=null;
             end;
           p:=new_glue(gq); subtype(p):=jfm_skip+1;
           link(p):=link(q); link(q):=p; return;
           end
         else begin p:=new_kern(char_kern(cur_f)(cur_i));
           link(p):=link(q); link(q):=p; return;
           end;
         if skip_byte(cur_i)>=stop_flag then return;
         a:=a+qo(skip_byte(cur_i))+1; {SKIP property}
         cur_i:=font_info[a].qqqq;
         end;
        end;
      end;
  end;
exit:end;
@z

@x [36.754] l.15452 - pTeX:
math_char, math_text_char:
@y
math_char, math_text_char, math_jchar, math_text_jchar:
@z

@x [36.754] pTeX:
sub_box: p:=info(nucleus(q));
@y
sub_box: p:=info(nucleus(q));
sub_exp_box: p:=shift_sub_exp_box(nucleus(q));
@z

@x [36.755] l.15475 - pTeX: convert math text to KANJI char_node
  begin delta:=char_italic(cur_f)(cur_i); p:=new_character(cur_f,qo(cur_c));
  if (math_type(nucleus(q))=math_text_char)and(space(cur_f)<>0) then
    delta:=0; {no italic correction in mid-word of text font}
  if (math_type(subscr(q))=empty)and(delta<>0) then
    begin link(p):=new_kern(delta); delta:=0;
@y
  begin delta:=char_italic(cur_f)(cur_i); p:=new_character(cur_f,qo(cur_c));
  u:=p;
  if font_dir[cur_f]<>dir_default then begin
    link(u):=get_avail; u:=link(u); info(u):=math_kcode(q);
  end;
  if ((math_type(nucleus(q))=math_text_char)or
      (math_type(nucleus(q))=math_text_jchar))and(space(cur_f)<>0) then
    delta:=0; {no italic correction in mid-word of text font}
  if (math_type(subscr(q))=empty)and(delta<>0) then begin
    link(u):=new_kern(delta); delta:=0;
@z

@x [36.756] l.15505 - pTeX: free box
  shift_down:=depth(z)+sub_drop(t);
  free_node(z,box_node_size);
  end;
@y
  shift_down:=depth(z)+sub_drop(t);
  delete_glue_ref(space_ptr(z)); delete_glue_ref(xspace_ptr(z));
  free_node(z,box_node_size);
  end;
@z

@x [36.757] l.15526 - pTeX: make_scripts:clean_box
begin x:=clean_box(subscr(q),sub_style(cur_style));
@y
begin x:=clean_box(subscr(q),sub_style(cur_style),math_kcode(q));
@z

@x [36.758] l.15538 - pTeX: make_scripts:clean_box
begin x:=clean_box(supscr(q),sup_style(cur_style));
@y
begin x:=clean_box(supscr(q),sup_style(cur_style),math_kcode(q));
@z

@x [36.758] l.15555 - pTeX: make_scripts:clean_box
begin y:=clean_box(subscr(q),sub_style(cur_style));
@y
begin y:=clean_box(subscr(q),sub_style(cur_style),math_kcode(q));
@z

@x [36.760] l.15616 - pTeX: disp_node
othercases confusion("mlist3")
@y
disp_node: begin link(p):=q; p:=q; q:=link(q); link(p):=null; goto done;
  end;
othercases confusion("mlist3")
@z

@x [37.???] init_span: pTeX: init inhibit_glue_flag
if mode=-hmode then space_factor:=1000
else  begin prev_depth:=ignore_depth; normal_paragraph;
  end;
@y
if mode=-hmode then space_factor:=1000
else  begin prev_depth:=ignore_depth; normal_paragraph;
  end;
inhibit_glue_flag:=false;
@z

@x [37.796] l.16276 - pTeX: call adjust_hlist
  begin adjust_tail:=cur_tail; u:=hpack(link(head),natural); w:=width(u);
@y
  begin adjust_tail:=cur_tail; adjust_hlist(head,false);
  delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
  cur_kanji_skip:=space_ptr(head); cur_xkanji_skip:=xspace_ptr(head);
  add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
  u:=hpack(link(head),natural); w:=width(u);
@z

@x [37.799] l.16331 - fin_row: pTeX: call adjust_hlist
  begin p:=hpack(link(head),natural);
@y
  begin adjust_hlist(head,false);
  delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
  cur_kanji_skip:=space_ptr(head); cur_xkanji_skip:=xspace_ptr(head);
  add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
  p:=hpack(link(head),natural);
@z

@x [37.799] l.16331 - fin_row: init inhibit_glue_flag
  link(tail):=p; tail:=p; space_factor:=1000;
@y
  link(tail):=p; tail:=p; space_factor:=1000;
  inhibit_glue_flag:=false;
@z

@x [37.800] l.16353 - pTeX: call adjust_hlist
var @!p,@!q,@!r,@!s,@!u,@!v: pointer; {registers for the list operations}
@y
var @!p,@!q,@!r,@!s,@!u,@!v,@!z: pointer; {registers for the list operations}
@z

@x [37.804] l.16456 - pTeX: call adjust_hlist
  p:=hpack(preamble,saved(1),saved(0)); overfull_rule:=rule_save;
@y
  z:=new_null_box; link(z):=preamble;
  adjust_hlist(z,false);
  delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
  cur_kanji_skip:=space_ptr(z); cur_xkanji_skip:=xspace_ptr(z);
  add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
  p:=hpack(preamble,saved(1),saved(0)); overfull_rule:=rule_save;
  delete_glue_ref(space_ptr(z)); delete_glue_ref(xspace_ptr(z));
  free_node(z,box_node_size);
@z

@x [37.807] l.16499 - pTeX: unset box -> BOX
glue_order(q):=glue_order(p); glue_sign(q):=glue_sign(p);
glue_set(q):=glue_set(p); shift_amount(q):=o;
r:=link(list_ptr(q)); s:=link(list_ptr(p));
@y
set_box_dir(q)(direction);
glue_order(q):=glue_order(p); glue_sign(q):=glue_sign(p);
glue_set(q):=glue_set(p); shift_amount(q):=o;
r:=link(list_ptr(q)); s:=link(list_ptr(p));
@z

@x [37.809] l.16541 - pTeX: unset box -> BOX
s:=link(s); link(u):=new_null_box; u:=link(u); t:=t+width(s);
if mode=-vmode then width(u):=width(s)@+else
  begin type(u):=vlist_node; height(u):=width(s);
  end
@y
s:=link(s); link(u):=new_null_box; u:=link(u); t:=t+width(s);
if mode=-vmode then width(u):=width(s)@+else
  begin type(u):=vlist_node; height(u):=width(s);
  end;
set_box_dir(u)(direction)
@z

@x [37.810] l.16564 - pTeX: unset box -> BOX
width(r):=w; type(r):=hlist_node;
end
@y
width(r):=w; type(r):=hlist_node;
set_box_dir(r)(direction);
end
@z

@x [37.811] l.16585 - pTeX: unset box -> BOX
height(r):=w; type(r):=vlist_node;
@y
height(r):=w; type(r):=vlist_node;
set_box_dir(r)(direction);
@z

@x [38.816] l.16687 - pTeX: init chain, delete disp_node
link(temp_head):=link(head);
if is_char_node(tail) then tail_append(new_penalty(inf_penalty))
else if type(tail)<>glue_node then tail_append(new_penalty(inf_penalty))
@y
first_use:=true; chain:=false;
delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
cur_kanji_skip:=space_ptr(head); cur_xkanji_skip:=xspace_ptr(head);
add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
link(temp_head):=link(head);
if not is_char_node(tail)and(type(tail)=disp_node) then
  begin free_node(tail,small_node_size); tail:=prev_node; link(tail):=null
  end;
if is_char_node(tail) then tail_append(new_penalty(inf_penalty))
else if type(tail)<>glue_node then tail_append(new_penalty(inf_penalty))
@z

@x [38.828] l.16946 - pTeX: Global variable |chain|
@!cur_p:pointer; {the current breakpoint under consideration}
@y
@!cur_p:pointer; {the current breakpoint under consideration}
@!chain:boolean; {chain current line and next line?}
@z

% chain ¤¬¿¿¤Î¾ì¹ç¡¢¸å¤í¤Ë cur_kanji_skip ¤¬ÁÞÆþ¤µ¤ì¤ë¤Î¤Ç¡¢¤³¤³¤Ç
% break_width ¤«¤é°ú¤¤¤Æ¤ª¤«¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
@x [38.837] l.17125 - pTeX: add kanji_skip width, ita_kern
begin no_break_yet:=false; do_all_six(set_break_width_to_background);
s:=cur_p;
if break_type>unhyphenated then if cur_p<>null then
  @<Compute the discretionary |break_width| values@>;
while s<>null do
  begin if is_char_node(s) then goto done;
@y
begin no_break_yet:=false; do_all_six(set_break_width_to_background);
s:=cur_p;
if break_type>unhyphenated then if cur_p<>null then
  @<Compute the discretionary |break_width| values@>;
while s<>null do
  begin if is_char_node(s) then
    begin if chain then
      begin break_width[1]:=break_width[1]-width(cur_kanji_skip);
      break_width[2+stretch_order(cur_kanji_skip)]:=
         break_width[2+stretch_order(cur_kanji_skip)]-stretch(cur_kanji_skip);
      break_width[6]:=break_width[6]-shrink(cur_kanji_skip);
      end;
    goto done end;
@z

@x [38.837] l.17135 - pTeX:
  kern_node: if subtype(s)<>explicit then goto done
    else break_width[1]:=break_width[1]-width(s);
@y
  kern_node: if (subtype(s)<>explicit)and(subtype(s)<>ita_kern) then
    goto done
    else break_width[1]:=break_width[1]-width(s);
@z

@x [38.841] l.17186 - pTeX:
if is_char_node(v) then
  begin f:=font(v);
  break_width[1]:=break_width[1]-char_width(f)(char_info(f)(character(v)));
  end
else  case type(v) of
  ligature_node: begin f:=font(lig_char(v));@/
    break_width[1]:=@|break_width[1]-
      char_width(f)(char_info(f)(character(lig_char(v))));
    end;
  hlist_node,vlist_node,rule_node,kern_node:
    break_width[1]:=break_width[1]-width(v);
  othercases confusion("disc1")
@:this can't happen disc1}{\quad disc1@>
  endcases
@y
if is_char_node(v) then
  begin f:=font(v);
  break_width[1]:=break_width[1]-char_width(f)(orig_char_info(f)(character(v)));
  if font_dir[f]<>dir_default then v:=link(v);
  end
else case type(v) of
  ligature_node: begin f:=font(lig_char(v));@/
    break_width[1]:=@|break_width[1]-
      char_width(f)(orig_char_info(f)(character(lig_char(v))));
    end;
  hlist_node,vlist_node,dir_node,rule_node,kern_node:
    break_width[1]:=break_width[1]-width(v);
  disp_node: do_nothing;
  othercases confusion("disc1")
@:this can't happen disc1}{\quad disc1@>
  endcases
@z

@x [38.842] l.17204 - pTeX:
  break_width[1]:=@|break_width[1]+char_width(f)(char_info(f)(character(s)));
  end
else  case type(s) of
  ligature_node: begin f:=font(lig_char(s));
    break_width[1]:=break_width[1]+
      char_width(f)(char_info(f)(character(lig_char(s))));
    end;
  hlist_node,vlist_node,rule_node,kern_node:
    break_width[1]:=break_width[1]+width(s);
@y
  break_width[1]:=@|break_width[1]+char_width(f)(orig_char_info(f)(character(s)));
  if font_dir[f]<>dir_default then s:=link(s);
  end
else  case type(s) of
  ligature_node: begin f:=font(lig_char(s));
    break_width[1]:=break_width[1]+
      char_width(f)(orig_char_info(f)(character(lig_char(s))));
    end;
  hlist_node,vlist_node,dir_node,rule_node,kern_node:
    break_width[1]:=break_width[1]+width(s);
  disp_node: do_nothing;
@z

@x [38.856] l.17467 - pTeX: print symbolic feasibe node
if cur_p=null then print_esc("par")
else if type(cur_p)<>glue_node then
  begin if type(cur_p)=penalty_node then print_esc("penalty")
  else if type(cur_p)=disc_node then print_esc("discretionary")
@y
if cur_p=null then print_esc("par")
else if (type(cur_p)<>glue_node)and(not is_char_node(cur_p)) then
  begin if type(cur_p)=penalty_node then print_esc("penalty")
  else if type(cur_p)=disc_node then print_esc("discretionary")
@z

@x [39.862] l.17584 - pTeX: local valiable for line breaking
@!auto_breaking:boolean; {is node |cur_p| outside a formula?}
@!prev_p:pointer; {helps to determine when glue nodes are breakpoints}
@!q,@!r,@!s,@!prev_s:pointer; {miscellaneous nodes of temporary interest}
@!f:internal_font_number; {used when calculating character widths}
@y
@!auto_breaking:boolean; {is node |cur_p| outside a formula?}
@!prev_p:pointer; {helps to determine when glue nodes are breakpoints}
@!q,@!r,@!s,@!prev_s:pointer; {miscellaneous nodes of temporary interest}
@!f,@!post_f:internal_font_number; {used when calculating character widths}
@!post_p:pointer;
@!cc:ASCII_code;
@!first_use:boolean;
@z

@x [39.866] l.17677 - pTeX: dir_node, disp_node, ita_kern
case type(cur_p) of
hlist_node,vlist_node,rule_node: act_width:=act_width+width(cur_p);
@y
case type(cur_p) of
hlist_node,vlist_node,dir_node,rule_node: act_width:=act_width+width(cur_p);
@z

@x [39.866] l.17685 - pTeX:
kern_node: if subtype(cur_p)=explicit then kern_break
  else act_width:=act_width+width(cur_p);
@y
kern_node: if (subtype(cur_p)=explicit)or(subtype(cur_p)=ita_kern) then
  kern_break
  else act_width:=act_width+width(cur_p);
@z

@x [39.866] l.17694 - pTeX:
mark_node,ins_node,adjust_node: do_nothing;
@y
disp_node,mark_node,ins_node,adjust_node: do_nothing;
@z

% ¤³¤³¤Ç¡¢Ï¢Â³¤¹¤ë´Á»ú¥³¡¼¥É´Ö¤Ë cur_kanji_skip ¤òÁÞÆþ¤¹¤ë¡£
% penalty_node ¤ä box_node ¤Ë¤Ï¡¢adjust_hlist ¥ë¡¼¥Á¥ó¤Ë¤è¤Ã¤Æ´û¤Ë¼ÂºÝ¤Î
% glue_node ¤¬ÁÞÆþ¤µ¤ì¤Æ¤¤¤ë¤â¤Î¤È²¾Äꤷ¤Æ¤¤¤ë¡£
% chain ¤Ï¡¢try_break ¤Ç cur_kanji_skip ¤Î¥¢¥¸¥ã¥¹¥È¤Î¤¿¤á¤Ë»È¤ï¤ì¤ë¡£
@x [39.867] l.17708 - pTeX: add kanji char width
@<Advance \(c)|cur_p| to the node following the present string...@>=
begin prev_p:=cur_p;
repeat f:=font(cur_p);
act_width:=act_width+char_width(f)(char_info(f)(character(cur_p)));
cur_p:=link(cur_p);
until not is_char_node(cur_p);
end
@y
@<Advance \(c)|cur_p| to the node following the present string...@>=
begin chain:=false;
if is_char_node(cur_p) then
  if font_dir[font(cur_p)]<>dir_default then
    begin case type(prev_p) of
    hlist_node,vlist_node,dir_node,rule_node,
    ligature_node,disc_node,math_node: begin
      cur_p:=prev_p; try_break(0,unhyphenated); cur_p:=link(cur_p);
      end;
    othercases do_nothing;
    endcases;
    end;
  prev_p:=cur_p; post_p:=cur_p; post_f:=font(post_p);
  repeat f:=post_f; cc:=character(cur_p);
  act_width:=act_width+char_width(f)(orig_char_info(f)(cc));
  post_p:=link(cur_p);
  if font_dir[f]<>dir_default then
    begin prev_p:=cur_p; cur_p:=post_p; post_p:=link(post_p);
    if is_char_node(post_p) then
      begin post_f:=font(post_p);
      if font_dir[post_f]<>dir_default then chain:=true else chain:=false;
      try_break(0,unhyphenated);
      end
    else
      begin chain:=false;
      case type(post_p) of
      hlist_node,vlist_node,dir_node,rule_node,ligature_node,
        disc_node,math_node: try_break(0,unhyphenated);
      othercases do_nothing;
      endcases;
      end;
    if chain then
      begin if first_use then
        begin check_shrinkage(cur_kanji_skip);
        first_use:=false;
        end;
      act_width:=act_width+width(cur_kanji_skip);@|
      active_width[2+stretch_order(cur_kanji_skip)]:=@|
          active_width[2+stretch_order(cur_kanji_skip)]
          +stretch(cur_kanji_skip);@/
      active_width[6]:=active_width[6]+shrink(cur_kanji_skip);
      end;
    prev_p:=cur_p;
    end
  else  if is_char_node(post_p) then
    begin post_f:=font(post_p); chain:=false;
    if font_dir[post_f]<>dir_default then try_break(0,unhyphenated);
    end;
  cur_p:=post_p;
  until not is_char_node(cur_p);
chain:=false;
end
@z

@x [39.868] l.17723 - pTeX: ita_kern
  else if (type(prev_p)=kern_node)and(subtype(prev_p)<>explicit) then
    try_break(0,unhyphenated);
@y
  else if type(prev_p)=kern_node then
    if (subtype(prev_p)<>explicit)and(subtype(prev_p)<>ita_kern) then
    try_break(0,unhyphenated);
@z

@x [39.871] l.17756 - pTeX: add kanji char width, dir_node width, disp_node
  disc_width:=disc_width+char_width(f)(char_info(f)(character(s)));
  end
else  case type(s) of
  ligature_node: begin f:=font(lig_char(s));
    disc_width:=disc_width+
      char_width(f)(char_info(f)(character(lig_char(s))));
    end;
  hlist_node,vlist_node,rule_node,kern_node:
    disc_width:=disc_width+width(s);
@y
  disc_width:=disc_width+char_width(f)(orig_char_info(f)(character(s)));
  if font_dir[f]<>dir_default then s:=link(s)
  end
else  case type(s) of
  ligature_node: begin f:=font(lig_char(s));
    disc_width:=disc_width+
      char_width(f)(orig_char_info(f)(character(lig_char(s))));
    end;
  hlist_node,vlist_node,dir_node,rule_node,kern_node:
    disc_width:=disc_width+width(s);
  disp_node: do_nothing;
@z

@x [39.872] l.17772 - pTeX: add kanji char width, dir_node width, disp_node
  act_width:=act_width+char_width(f)(char_info(f)(character(s)));
  end
else  case type(s) of
  ligature_node: begin f:=font(lig_char(s));
    act_width:=act_width+
      char_width(f)(char_info(f)(character(lig_char(s))));
    end;
  hlist_node,vlist_node,rule_node,kern_node:
    act_width:=act_width+width(s);
@y
  act_width:=act_width+char_width(f)(orig_char_info(f)(character(s)));
  if font_dir[f]<>dir_default then s:=link(s)
  end
else  case type(s) of
  ligature_node: begin f:=font(lig_char(s));
    act_width:=act_width+
      char_width(f)(orig_char_info(f)(character(lig_char(s))));
    end;
  hlist_node,vlist_node,dir_node,rule_node,kern_node:
    act_width:=act_width+width(s);
  disp_node: do_nothing;
@z

@x [39.877] l.17879 - pTeX: last_disp
cur_line:=prev_graf+1;
@y
cur_line:=prev_graf+1; last_disp:=0;
@z

@x [39.879] l.17919 - pTeX: ita_kern
  if type(q)=kern_node then if subtype(q)<>explicit then goto done1;
@y
  if type(q)=kern_node then
    if (subtype(q)<>explicit)and(subtype(q)<>ita_kern) then goto done1;
@z

@x [39.881] l.17950 - pTeX: |q| may be a |char_node|
if q<>null then {|q| cannot be a |char_node|}
  if type(q)=glue_node then
    begin delete_glue_ref(glue_ptr(q));
    glue_ptr(q):=right_skip;
    subtype(q):=right_skip_code+1; add_glue_ref(right_skip);
    goto done;
    end
  else  begin if type(q)=disc_node then
      @<Change discretionary to compulsory and set
        |disc_break:=true|@>
@y
if q<>null then {|q| may be a |char_node|}
  begin if not is_char_node(q) then
    if type(q)=glue_node then
      begin delete_glue_ref(glue_ptr(q));
      glue_ptr(q):=right_skip;
      subtype(q):=right_skip_code+1; add_glue_ref(right_skip);
      goto done;
      end
    else  begin if type(q)=disc_node then
        @<Change discretionary to compulsory and set
          |disc_break:=true|@>
@z
@x [39.881] l.17961 - pTeX: |q| may be a |char_node|
    end
@y
      end
  end
@z

@x [39.887] l.18014 - pTeX: disp_node at begin-of-line
r:=link(q); link(q):=null; q:=link(temp_head); link(temp_head):=r;
@y
r:=link(q); link(q):=null; q:=link(temp_head); link(temp_head):=r;
if last_disp<>0 then begin
  r:=get_node(small_node_size);
  type(r):=disp_node; disp_dimen(r):=last_disp;
  link(r):=q; q:=r; disp_called:=true;
  end;
@z

@x [40.896] l.18177 - pTeX: hyphenation
loop@+  begin if is_char_node(s) then
    begin c:=qo(character(s)); hf:=font(s);
    end
@y
loop@+  begin if is_char_node(s) then
    begin hf:=font(s);
    if font_dir[hf]<>dir_default then
      begin prev_s:=s; s:=link(prev_s); c:=info(s); goto continue;
      end else c:=qo(character(s));
    end
  else if type(s)=disp_node then goto continue
  else if (type(s)=penalty_node)and(not subtype(s)=normal) then goto continue
@z

@x [40.899] l.18248 - pTeX: disp_node
    whatsit_node,glue_node,penalty_node,ins_node,adjust_node,mark_node:
      goto done4;
@y
    disp_node: do_nothing;
    whatsit_node,glue_node,penalty_node,ins_node,adjust_node,mark_node:
      goto done4;
@z

@x [44.968] l.19535 - pTeX: dir_node
  hlist_node,vlist_node,rule_node:@<Insert glue for |split_top_skip|
@y
  dir_node,
  hlist_node,vlist_node,rule_node:@<Insert glue for |split_top_skip|
@z

@x [44.973] l.19626 - pTeX: dir_node
hlist_node,vlist_node,rule_node: begin@t@>@;@/
@y
dir_node,
hlist_node,vlist_node,rule_node: begin@t@>@;@/
@z

@x [44.977] l.19710 - pTeX: free box node
var v:pointer; {the box to be split}
@y
var v:pointer; {the box to be split}
w:pointer; {|dir_node|}
@z

@x [44.977] l.19722 - pTeX: free box node
q:=prune_page_top(q); p:=list_ptr(v); free_node(v,box_node_size);
if q=null then box(n):=null {the |eq_level| of the box stays the same}
else box(n):=vpack(q,natural);
vsplit:=vpackage(p,h,exactly,split_max_depth);
@y
q:=prune_page_top(q); p:=list_ptr(v);
if q=null then box(n):=null {the |eq_level| of the box stays the same}
else begin
  box(n):=vpack(q,natural); set_box_dir(box(n))(box_dir(v));
  end;
q:=vpackage(p,h,exactly,split_max_depth);
set_box_dir(q)(box_dir(v));
delete_glue_ref(space_ptr(v)); delete_glue_ref(xspace_ptr(v));
free_node(v,box_node_size);
vsplit:=q;
@z

@x [44.978] l.19732 - pTeX: bad box for vsplit
if type(v)<>vlist_node then
  begin print_err(""); print_esc("vsplit"); print(" needs a ");
  print_esc("vbox");
@:vsplit_}{\.{\\vsplit needs a \\vbox}@>
  help2("The box you are trying to split is an \hbox.")@/
  ("I can't split such a box, so I'll leave it alone.");
  error; vsplit:=null; return;
  end
@y
if type(v)=dir_node then begin
  w:=v; v:=list_ptr(v);
  delete_glue_ref(space_ptr(w));
  delete_glue_ref(xspace_ptr(w));
  free_node(w,box_node_size);
end;
if type(v)<>vlist_node then begin
  print_err(""); print_esc("vsplit"); print(" needs a ");
  print_esc("vbox");
@:vsplit_}{\.{\\vsplit needs a \\vbox}@>
  help2("The box you are trying to split is an \hbox.")@/
  ("I can't split such a box, so I'll leave it alone.");
  error; vsplit:=null; return;
end;
flush_node_list(link(v)); link(v):=null
@z

@x [45.993] l.20053 - pTeX: ensure_vbox
begin p:=box(n);
if p<>null then if type(p)=hlist_node then
  begin print_err("Insertions can only be added to a vbox");
@y
begin p:=box(n);
if p<>null then if type(p)=dir_node then
  begin p:=list_ptr(p);
  delete_glue_ref(space_ptr(box(n)));
  delete_glue_ref(xspace_ptr(box(n)));
  free_node(box(n),box_node_size);
  box(n):=p
end;
if p<>null then if type(p)<>vlist_node then begin
  print_err("Insertions can only be added to a vbox");
@z

@x [45.1000] l.20146 - pTeX: dir_node
hlist_node,vlist_node,rule_node: if page_contents<box_there then
    @<Initialize the current page, insert the \.{\\topskip} glue
      ahead of |p|, and |goto continue|@>
@y
hlist_node,vlist_node,dir_node,rule_node: if page_contents<box_there then
    @<Initialize the current page, insert the \.{\\topskip} glue
      ahead of |p|, and |goto continue|@>
@z

@x [45.1009] l.20291 - pTeX: ins_dir
if box(n)=null then height(r):=0
else height(r):=height(box(n))+depth(box(n));
@y
if box(n)=null then height(r):=0
else
  begin if abs(ins_dir(p))<>abs(box_dir(box(n))) then
    begin print_err("Insertions can only be added to a same direction vbox");
@.Insertions can only...@>
    help3("Tut tut: You're trying to \insert into a")@/
      ("\box register that now have a different direction.")@/
      ("Proceed, and I'll discard its present contents.");
    box_error(n)
    end
  else
    height(r):=height(box(n))+depth(box(n));
  end;
@z

@x [45.1017] l.20470 - pTeX: page dir
box(255):=vpackage(link(page_head),best_size,exactly,page_max_depth);
@y
box(255):=vpackage(link(page_head),best_size,exactly,page_max_depth);
set_box_dir(box(255))(page_dir);
@z

@x [45.1020] l.20513 - pTeX: check ins_dir
if best_ins_ptr(r)=null then wait:=true
else  begin wait:=false; s:=last_ins_ptr(r); link(s):=ins_ptr(p);
@y
if best_ins_ptr(r)=null then wait:=true
else  begin wait:=false;
  n:=qo(subtype(p));
  case abs(box_dir(box(n))) of
    any_dir:
      if abs(ins_dir(p))<>abs(box_dir(box(n))) then begin
        print_err("Insertions can only be added to a same direction vbox");
@.Insertions can only...@>
        help3("Tut tut: You're trying to \insert into a")@/
          ("\box register that now have a different direction.")@/
          ("Proceed, and I'll discard its present contents.");
        box_error(n);
        box(n):=new_null_box; last_ins_ptr(r):=box(n)+list_offset;
      end;
    othercases
      set_box_dir(box(n))(abs(ins_dir(p)));
  endcases;
  s:=last_ins_ptr(r); link(s):=ins_ptr(p);
@z

@x [45.1021] l.20537 - pTeX: free box node, ins_dir
      free_node(temp_ptr,box_node_size); wait:=true;
@y
      delete_glue_ref(space_ptr(temp_ptr));
      delete_glue_ref(xspace_ptr(temp_ptr));
      free_node(temp_ptr,box_node_size); wait:=true;
@z

@x [45.1021] l.20543 - pTeX: free box node, ins_dir
free_node(box(n),box_node_size);
box(n):=vpack(temp_ptr,natural);
@y
delete_glue_ref(space_ptr(box(n)));
delete_glue_ref(xspace_ptr(box(n)));
flush_node_list(link(box(n)));
free_node(box(n),box_node_size);
box(n):=vpack(temp_ptr,natural); set_box_dir(box(n))(abs(ins_dir(p)));
@z

@x [46.1030] l.20687 -  pTeX:main_control
@d append_normal_space=120 {go here to append a normal space between words}
@y
@d append_normal_space=120 {go here to append a normal space between words}
@d main_loop_j=130 {like |main_loop|, but |cur_chr| holds a KANJI code}
@d skip_loop=141
@d again_2=150
@z

@x [46.1030] l.20691 - pTeX: main_control
procedure main_control; {governs \TeX's activities}
label big_switch,reswitch,main_loop,main_loop_wrapup,
@y
procedure main_control; {governs \TeX's activities}
label big_switch,reswitch,main_loop,main_loop_wrapup,
  main_loop_j,main_loop_j+1,main_loop_j+3,skip_loop,again_2,
@z

@x [46.1030] l.20697 - pTeX: main_control
var@!t:integer; {general-purpose temporary variable}
@y
var@!t:integer; {general-purpose temporary variable}
@!cx:KANJI_code; {kanji character}
@!kp:pointer; {kinsoku penalty register}
@!gp,gq:pointer; {temporary registers for list manipulation}
@!disp:scaled; {displacement register}
@!ins_kp:boolean; {whether insert kinsoku penalty}
@z

@x [46.1030] l.20701 - pTeX: main_control
case abs(mode)+cur_cmd of
hmode+letter,hmode+other_char,hmode+char_given: goto main_loop;
hmode+char_num: begin scan_char_num; cur_chr:=cur_val; goto main_loop;@+end;
hmode+no_boundary: begin get_x_token;
  if (cur_cmd=letter)or(cur_cmd=other_char)or(cur_cmd=char_given)or
   (cur_cmd=char_num) then cancel_boundary:=true;
  goto reswitch;
  end;
@y
ins_kp:=false;
case abs(mode)+cur_cmd of
hmode+letter,hmode+other_char: goto main_loop;
hmode+kanji,hmode+kana,hmode+other_kchar: goto main_loop_j;
hmode+char_given:
  if is_char_ascii(cur_chr) then goto main_loop else goto main_loop_j;
hmode+char_num: begin scan_char_num; cur_chr:=cur_val;
  if is_char_ascii(cur_chr) then goto main_loop else goto main_loop_j;
  end;
hmode+no_boundary: begin get_x_token;
  if (cur_cmd=letter)or(cur_cmd=other_char)or
   (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar)or
   (cur_cmd=char_given)or(cur_cmd=char_num) then cancel_boundary:=true;
  goto reswitch;
  end;
@z

@x [46.1030] l.20715 - pTeX: main_control
main_loop:@<Append character |cur_chr| and the following characters (if~any)
  to the current hlist in the current font; |goto reswitch| when
  a non-character has been fetched@>;
@y
main_loop_j:@<Append KANJI-character |cur_chr|
  to the current hlist in the current font; |goto reswitch| when
  a non-character has been fetched@>;
main_loop: inhibit_glue_flag:=false;
@<Append character |cur_chr| and the following characters (if~any)
  to the current hlist in the current font; |goto reswitch| when
  a non-character has been fetched@>;
@z

@x [46.1034] l.20788 - pTeX: disp_node
@<Append character |cur_chr|...@>=
if ((head=tail) and (mode>0)) then begin
  if (insert_src_special_auto) then append_src_special;
end;
adjust_space_factor;@/
@y
@<Append character |cur_chr|...@>=
if ((head=tail) and (mode>0)) then begin
  if (insert_src_special_auto) then append_src_special;
end;
adjust_space_factor;@/
if direction=dir_tate then disp:=t_baseline_shift else disp:=y_baseline_shift;
@<Append |disp_node| at begin of displace area@>;
@z

%@x [46.1035] l.20850 - pTeX: kinsoku penalty
%@<Make a ligature node, if |ligature_present|;...@>=
%wrapup(rt_hit)
%@y
%@<Make a ligature node, if |ligature_present|;...@>=
%wrapup(rt_hit);
%if ins_kp=true then
%  begin cx:=KANJI(cur_l); @<Insert kinsoku penalty@>;
%  ins_kp:=false;
%  end
%@z

@x [46.1036] l.20854 - pTeX: disp_node
if lig_stack=null then goto reswitch;
@y
if lig_stack=null then
  begin @<Append |disp_node| at end of displace area@>;
  goto reswitch;
  end;
@z

@x [46.1037] l.20886 - pTeX: Look ahead for another character
@<Look ahead for another character...@>=
get_next; {set only |cur_cmd| and |cur_chr|, for speed}
if cur_cmd=letter then goto main_loop_lookahead+1;
if cur_cmd=other_char then goto main_loop_lookahead+1;
if cur_cmd=char_given then goto main_loop_lookahead+1;
x_token; {now expand and set |cur_cmd|, |cur_chr|, |cur_tok|}
if cur_cmd=letter then goto main_loop_lookahead+1;
if cur_cmd=other_char then goto main_loop_lookahead+1;
if cur_cmd=char_given then goto main_loop_lookahead+1;
if cur_cmd=char_num then
  begin scan_char_num; cur_chr:=cur_val; goto main_loop_lookahead+1;
  end;
if cur_cmd=no_boundary then bchar:=non_char;
cur_r:=bchar; lig_stack:=null; goto main_lig_loop;
main_loop_lookahead+1: adjust_space_factor;
fast_get_avail(lig_stack); font(lig_stack):=main_f;
cur_r:=qi(cur_chr); character(lig_stack):=cur_r;
if cur_r=false_bchar then cur_r:=non_char {this prevents spurious ligatures}
@y
@<Look ahead for another character...@>=
get_next; {set only |cur_cmd| and |cur_chr|, for speed}
if cur_cmd=letter then goto main_loop_lookahead+1;
if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
  @<goto |main_lig_loop|@>;
if cur_cmd=other_char then goto main_loop_lookahead+1;
if cur_cmd=char_given then
  begin if is_char_ascii(cur_chr) then goto main_loop_lookahead+1
  else @<goto |main_lig_loop|@>;
  end;
x_token; {now expand and set |cur_cmd|, |cur_chr|, |cur_tok|}
if cur_cmd=letter then goto main_loop_lookahead+1;
if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
  @<goto |main_lig_loop|@>;
if cur_cmd=other_char then goto main_loop_lookahead+1;
if cur_cmd=char_given then
  begin if is_char_ascii(cur_chr) then goto main_loop_lookahead+1
  else @<goto |main_lig_loop|@>;
  end;
if cur_cmd=char_num then
  begin scan_char_num; cur_chr:=cur_val;
  if is_char_ascii(cur_chr) then goto main_loop_lookahead+1
  else @<goto |main_lig_loop|@>;
  end;
if cur_cmd=inhibit_glue then
  begin inhibit_glue_flag:=true; goto main_loop_lookahead;
  end;
if cur_cmd=no_boundary then bchar:=non_char;
cur_r:=bchar; lig_stack:=null; goto main_lig_loop;
main_loop_lookahead+1: adjust_space_factor;
inhibit_glue_flag:=false;
fast_get_avail(lig_stack); font(lig_stack):=main_f;
cur_r:=qi(cur_chr); character(lig_stack):=cur_r;
if cur_r=false_bchar then cur_r:=non_char {this prevents spurious ligatures}

@ @<goto |main_lig_loop|@>=
begin bchar:=non_char; cur_r:=bchar; lig_stack:=null;
if ligature_present then pack_lig(rt_hit);
if ins_kp=true then
  begin cx:=cur_l; @<Insert kinsoku penalty@>;
  end;
ins_kp:=false;
goto main_loop_j;
end
@z

@x [46.1041] l.20999 - pTeX: disp_node
link(tail):=temp_ptr; tail:=temp_ptr;
@y
if not is_char_node(tail)and(type(tail)=disp_node) then
  begin link(prev_node):=temp_ptr; link(temp_ptr):=tail; prev_node:=temp_ptr;
  end
else begin link(tail):=temp_ptr; tail:=temp_ptr;
  end;
@z

@x [46.1043] l.21029 - pTeX: disp_node
link(tail):=q; tail:=q;
@y
if not is_char_node(tail)and(type(tail)=disp_node) then
  begin link(prev_node):=q; link(q):=tail; prev_node:=q;
  end
else begin link(tail):=q; tail:=q;
  end
@z

@x [47.????] pTeX: reset inhibit_glue_flag at rule_node
vmode+hrule,hmode+vrule,mmode+vrule: begin tail_append(scan_rule_spec);
@y
vmode+hrule,hmode+vrule,mmode+vrule: begin tail_append(scan_rule_spec);
  inhibit_glue_flag := false;
@z

@x [47.1060] pTeX: append_glue, inhibit_glue_flag
end; {now |cur_val| points to the glue specification}
tail_append(new_glue(cur_val));
if s>=skip_code then
@y
end; {now |cur_val| points to the glue specification}
tail_append(new_glue(cur_val));
inhibit_glue_flag := false;
if s>=skip_code then
@z

@x [47.1061] l.21277 - pTeX: append kern
begin s:=cur_chr; scan_dimen(s=mu_glue,false,false);
tail_append(new_kern(cur_val)); subtype(tail):=s;
end;
@y
begin s:=cur_chr; scan_dimen(s=mu_glue,false,false);
inhibit_glue_flag := false;
if not is_char_node(tail)and(type(tail)=disp_node) then
  begin prev_append(new_kern(cur_val)); subtype(prev_node):=s;
  end
else
  begin tail_append(new_kern(cur_val)); subtype(tail):=s;
  end;
end;
@z

@x [47.1068] l.21377 - pTeX:
var p,@!q:pointer; {for short-term use}
@y
var p,@!q:pointer; {for short-term use}
@!r:pointer; {temporary}
@z

@x [47.1071] l.21485 - pTeX: \tate, \yoko, \dtou
primitive("hbox",make_box,vtop_code+hmode);@/
@!@:hbox_}{\.{\\hbox} primitive@>
@y
primitive("hbox",make_box,vtop_code+hmode);@/
@!@:hbox_}{\.{\\hbox} primitive@>
primitive("tate",chg_dir,dir_tate);@/
@!@:tate_}{\.{\\tate} primitive@>
primitive("yoko",chg_dir,dir_yoko);@/
@!@:yoko_}{\.{\\yoko} primitive@>
primitive("dtou",chg_dir,dir_dtou);@/
@!@:dtou_}{\.{\\dtou} primitive@>
@z

@x [47.1072] l.21506 - pTeX: \tate, \yoko, \dtou
  othercases print_esc("hbox")
  endcases;
leader_ship: if chr_code=a_leaders then print_esc("leaders")
@y
  othercases print_esc("hbox")
  endcases;
chg_dir:
  case chr_code of
    dir_yoko: print_esc("yoko");
    dir_tate: print_esc("tate");
    dir_dtou: print_esc("dtou");
  endcases;
leader_ship: if chr_code=a_leaders then print_esc("leaders")
@z

@x [47.1073] l.21523 - pTeX: \tate, \yoko
any_mode(make_box): begin_box(0);
@y
any_mode(make_box): begin_box(0);
any_mode(chg_dir):
  begin  if cur_group<>align_group then
    if mode=hmode then 
      begin print_err("Improper `"); print_cmd_chr(cur_cmd,cur_chr);
      print("'"); 
      help2("You cannot change the direction in unrestricted")
      ("horizontal mode."); error;
      end
    else if abs(mode)=mmode then
      begin print_err("Improper `"); print_cmd_chr(cur_cmd,cur_chr);
      print("'");
      help1("You cannot change the direction in math mode."); error;
      end
    else if nest_ptr=0 then change_page_direction(cur_chr)
    else if head=tail then direction:=cur_chr
    else begin print_err("Use `"); print_cmd_chr(cur_cmd,cur_chr);
      print("' at top of list");
      help2("Direction change command is available only while")
      ("current list is null."); error;
      end
  else begin print_err("You can't use `"); print_cmd_chr(cur_cmd,cur_chr);
    print("' in an align");
    help2("To change direction in an align,")
    ("you shold use \hbox or \vbox with \tate or \yoko."); error;
    end
  end;
@z

@x [47.1075] l.21538 - pTeX: box_end
var p:pointer; {|ord_noad| for new box in math mode}
@y
var p:pointer; {|ord_noad| for new box in math mode}
q:pointer;
@z

@x [47.1076] l.21553 - pTeX: box_dir adjust
  begin shift_amount(cur_box):=box_context;
@y
  begin p:=link(cur_box); link(cur_box):=null;
  while p<>null do begin
    q:=p; p:=link(p);
    if abs(box_dir(q))=abs(direction) then
      begin list_ptr(q):=cur_box; cur_box:=q; link(cur_box):=null;
      end
    else begin
      delete_glue_ref(space_ptr(q));
      delete_glue_ref(xspace_ptr(q));
      free_node(q,box_node_size);
      end;
  end;
  if abs(box_dir(cur_box))<>abs(direction) then
    cur_box:=new_dir_node(cur_box,abs(direction));
  shift_amount(cur_box):=box_context;
@z

@x [47.1076] pTeX: sub_exp_box
  else  begin if abs(mode)=hmode then space_factor:=1000
    else  begin p:=new_noad;
      math_type(nucleus(p)):=sub_box;
@y
  else  begin if abs(mode)=hmode then 
    begin space_factor:=1000; inhibit_glue_flag:=false; end
    else  begin p:=new_noad;
      math_type(nucleus(p)):=sub_exp_box;
@z

@x [47.1078] l.21585 - pTeX: box_dir adjust
  begin append_glue; subtype(tail):=box_context-(leader_flag-a_leaders);
  leader_ptr(tail):=cur_box;
  end
@y
  begin append_glue; subtype(tail):=box_context-(leader_flag-a_leaders);
  if type(cur_box)<=dir_node then
    begin p:=link(cur_box); link(cur_box):=null;
    while p<>null do
      begin q:=p; p:=link(p);
      if abs(box_dir(q))=abs(direction) then
        begin list_ptr(q):=cur_box; cur_box:=q; link(cur_box):=null;
        end
      else begin
        delete_glue_ref(space_ptr(q));
        delete_glue_ref(xspace_ptr(q));
        free_node(q,box_node_size);
        end;
      end;
    if abs(box_dir(cur_box))<>abs(direction) then
      cur_box:=new_dir_node(cur_box,abs(direction));
    end;
  leader_ptr(tail):=cur_box;
  end
@z

@x [47.1079] l.20920 begin_box - pTeX: disp_node, adjust direction
@!m:quarterword; {the length of a replacement list}
@y
@!r:pointer; {running behind |p|}
@!fd:boolean; {a final |disp_node| pair?}
@!disp,@!pdisp:scaled; {displacement}
@!a_dir:eight_bits; {adjust direction}
@!tx:pointer; {effective tail node}
@!m:quarterword; {the length of a replacement list}
@z

@x [47.1080] l.20937 - pTeX: disp_node, check head=tail
@ Note that the condition |not is_char_node(tail)| implies that |head<>tail|,
since |head| is a one-word node.
@y
@ Note that in \TeX\ the condition |not is_char_node(tail)| implies that
|head<>tail|, since |head| is a one-word node; this is not so for \pTeX.
@z

@x [47.1080] l.20940 - pTeX: disp_node
@<If the current list ends with a box node, delete it...@>=
@y
@d check_effective_tail_pTeX(#)==
tx:=tail;
if not is_char_node(tx) then
  if type(tx)=disp_node then
    begin tx:=prev_node;
    if not is_char_node(tx) then
      if type(tx)=disp_node then #; {|disp_node| from a discretionary}
    end
@#
@d fetch_effective_tail_pTeX(#)== {extract |tx|, merge |disp_node| pair}
q:=head; p:=null; disp:=0; pdisp:=0;
repeat r:=p; p:=q; fd:=false;
if not is_char_node(q) then
  if type(q)=disc_node then
    begin for m:=1 to replace_count(q) do p:=link(p);
    if p=tx then #;
    end
  else if type(q)=disp_node then
    begin pdisp:=disp; disp:=disp_dimen(q); fd:=true;@+end;
q:=link(p);
until q=tx; {found |r|$\to$|p|$\to$|q=tx|}
q:=link(tx); link(p):=q; link(tx):=null;
if q=null then tail:=p
else if fd then {|r|$\to$|p=disp_node|$\to$|q=disp_node|} 
  begin prev_node:=r; prev_disp:=pdisp; link(p):=null; tail:=p;
  disp_dimen(p):=disp_dimen(q); free_node(q,small_node_size);
  end
else prev_node:=p
@#
@d check_effective_tail==check_effective_tail_pTeX
@d fetch_effective_tail==fetch_effective_tail_pTeX

@<If the current list ends with a box node, delete it...@>=
@z

@x [47.1080] l.20950 - pTeX: disp_node, check head=tail
else  begin if not is_char_node(tail) then
    if (type(tail)=hlist_node)or(type(tail)=vlist_node) then
      @<Remove the last box, unless it's part of a discretionary@>;
  end;
@y
else  begin check_effective_tail(goto done);
  if not is_char_node(tx)and(head<>tx) then
    if (type(tx)=hlist_node)or(type(tx)=vlist_node)
       or(type(tx)=dir_node) then
      @<Remove the last box, unless it's part of a discretionary@>;
  done:end;
@z

@x [47.1081] l.20957 - pTeX: disp_node
begin q:=head;
repeat p:=q;
if not is_char_node(q) then if type(q)=disc_node then
  begin for m:=1 to replace_count(q) do p:=link(p);
  if p=tail then goto done;
  end;
q:=link(p);
until q=tail;
cur_box:=tail; shift_amount(cur_box):=0;
tail:=p; link(p):=null;
done:end
@y
begin fetch_effective_tail(goto done);
cur_box:=tx; shift_amount(cur_box):=0;
if type(cur_box)=dir_node then
  begin link(list_ptr(cur_box)):=cur_box;
  cur_box:=list_ptr(cur_box);
  list_ptr(link(cur_box)):=null;
  end
else
  if box_dir(cur_box)=dir_default then set_box_dir(cur_box)(direction);
end
@z

@x [47.1083] l.20989 - pTeX: adjust_dir
if k=hmode then
  if (box_context<box_flag)and(abs(mode)=vmode) then
    scan_spec(adjusted_hbox_group,true)
  else scan_spec(hbox_group,true)
else  begin if k=vmode then scan_spec(vbox_group,true)
  else  begin scan_spec(vtop_group,true); k:=vmode;
    end;
  normal_paragraph;
  end;
push_nest; mode:=-k;
@y
a_dir:=adjust_dir;
if k=hmode then
  if (box_context<box_flag)and(abs(mode)=vmode) then
    begin a_dir:=abs(direction); scan_spec(adjusted_hbox_group,true);
    end
  else scan_spec(hbox_group,true)
else  begin if k=vmode then scan_spec(vbox_group,true)
  else  begin scan_spec(vtop_group,true); k:=vmode;
    end;
  normal_paragraph;
  end;
push_nest; mode:=-k; adjust_dir:=a_dir;
@z

@x [47.1083] reset inhibit_glue_flag
else  begin space_factor:=1000;
@y
else  begin space_factor:=1000; inhibit_glue_flag:=false;
@z

@x [47.1085] l.21031 - pTeX: end of box, call adjust_hlist
hbox_group: package(0);
adjusted_hbox_group: begin adjust_tail:=adjust_head; package(0);
  end;
@y
hbox_group: begin adjust_hlist(head,false); package(0);
  end;
adjusted_hbox_group: begin adjust_hlist(head,false);
  adjust_tail:=adjust_head; package(0);
  end;
@z

@x [47.1086] l.21044 - pTeX: set cur_kanji_skip, cur_xkanji_skip
begin d:=box_max_depth; unsave; save_ptr:=save_ptr-3;
if mode=-hmode then cur_box:=hpack(link(head),saved(2),saved(1))
else  begin cur_box:=vpackage(link(head),saved(2),saved(1),d);
  if c=vtop_code then @<Readjust the height and depth of |cur_box|,
    for \.{\\vtop}@>;
  end;
pop_nest; box_end(saved(0));
end;
@y
begin d:=box_max_depth;
  delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
  if auto_spacing>0 then cur_kanji_skip:=kanji_skip
  else cur_kanji_skip:=zero_glue;
  if auto_xspacing>0 then cur_xkanji_skip:=xkanji_skip
  else cur_xkanji_skip:=zero_glue;
  add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
  unsave; save_ptr:=save_ptr-3;
  if mode=-hmode then begin
    cur_box:=hpack(link(head),saved(2),saved(1));
    set_box_dir(cur_box)(direction); pop_nest;
  end else begin
    cur_box:=vpackage(link(head),saved(2),saved(1),d);
    set_box_dir(cur_box)(direction); pop_nest;
    if c=vtop_code then
      @<Readjust the height and depth of |cur_box|, for \.{\\vtop}@>;
  end;
  box_end(saved(0));
end;
@z

@x [47.1090] l.21079 - pTeX: apend vmode case
vmode+letter,vmode+other_char,vmode+char_num,vmode+char_given,
   vmode+math_shift,vmode+un_hbox,vmode+vrule,
   vmode+accent,vmode+discretionary,vmode+hskip,vmode+valign,
   vmode+ex_space,vmode+no_boundary:@t@>@;@/
  begin back_input; new_graf(true);
  end;
@y
vmode+letter,vmode+other_char,vmode+char_num,vmode+char_given,
   vmode+math_shift,vmode+un_hbox,vmode+vrule,
   vmode+accent,vmode+discretionary,vmode+hskip,vmode+valign,
   vmode+kanji,vmode+kana,vmode+other_kchar,
   vmode+ex_space,vmode+no_boundary:@t@>@;@/
  begin back_input; new_graf(true);
  end;
@z

@x [47.1091] l.21096 - pTeX: new_graf, adjust direction
push_nest; mode:=hmode; space_factor:=1000; set_cur_lang; clang:=cur_lang;
@y
inhibit_glue_flag := false;
push_nest; adjust_dir:=direction;
mode:=hmode; space_factor:=1000; set_cur_lang; clang:=cur_lang;
@z

@x [47.???] indent_in_hmode: reset inhibit_glue_flag
  if abs(mode)=hmode then space_factor:=1000
@y
  if abs(mode)=hmode then 
    begin space_factor:=1000; inhibit_glue_flag:=false; end
@z

@x [47.1096] l.21155 - pTeX: end_graf, call adjust_hlist
  begin if head=tail then pop_nest {null paragraphs are ignored}
  else line_break(widow_penalty);
@y
  begin if head=tail then pop_nest {null paragraphs are ignored}
  else begin adjust_hlist(head,true); line_break(widow_penalty)
       end;
@z

@x [47.1099] l.21184 begin_insert_or_adjust - pTeX: insert and adjust
new_save_level(insert_group); scan_left_brace; normal_paragraph;
push_nest; mode:=-vmode; prev_depth:=ignore_depth;
@y
inhibit_glue_flag:=false;
new_save_level(insert_group); scan_left_brace; normal_paragraph;
push_nest; mode:=-vmode; direction:=adjust_dir; prev_depth:=ignore_depth;
@z

@x [47.1100] l.21189 - pTeX: free box node, ins_dir
insert_group: begin end_graf; q:=split_top_skip; add_glue_ref(q);
  d:=split_max_depth; f:=floating_penalty; unsave; decr(save_ptr);
  {now |saved(0)| is the insertion number, or 255 for |vadjust|}
  p:=vpack(link(head),natural); pop_nest;
  if saved(0)<255 then
    begin tail_append(get_node(ins_node_size));
    type(tail):=ins_node; subtype(tail):=qi(saved(0));
    height(tail):=height(p)+depth(p); ins_ptr(tail):=list_ptr(p);
    split_top_ptr(tail):=q; depth(tail):=d; float_cost(tail):=f;
    end
  else  begin tail_append(get_node(small_node_size));
    type(tail):=adjust_node;@/
    subtype(tail):=0; {the |subtype| is not used}
    adjust_ptr(tail):=list_ptr(p); delete_glue_ref(q);
    end;
  free_node(p,box_node_size);
  if nest_ptr=0 then build_page;
  end;
@y
insert_group: begin end_graf; q:=split_top_skip; add_glue_ref(q);
  d:=split_max_depth; f:=floating_penalty; unsave; decr(save_ptr);
  {now |saved(0)| is the insertion number, or 255 for |vadjust|}
  p:=vpack(link(head),natural); set_box_dir(p)(direction); pop_nest;
  if saved(0)<255 then
    begin r:=get_node(ins_node_size);
    type(r):=ins_node; subtype(r):=qi(saved(0));
    height(r):=height(p)+depth(p); ins_ptr(r):=list_ptr(p);
    split_top_ptr(r):=q; depth(r):=d; float_cost(r):=f;
    set_ins_dir(r)(box_dir(p));
    if not is_char_node(tail)and(type(tail)=disp_node) then
      prev_append(r)
    else tail_append(r);
    end
  else  begin
    if abs(box_dir(p))<>abs(adjust_dir) then
      begin print_err("Direction Incompatible");
      help1("\vadjust's argument and outer vlist must have same direction.");
      error; flush_node_list(list_ptr(p));
      end
    else  begin
      r:=get_node(small_node_size); type(r):=adjust_node;@/
      adjust_ptr(r):=list_ptr(p); delete_glue_ref(q);
      if not is_char_node(tail)and(type(tail)=disp_node) then
        prev_append(r)
      else tail_append(r);
      end;
    end;
  delete_glue_ref(space_ptr(p));
  delete_glue_ref(xspace_ptr(p));
  free_node(p,box_node_size);
  if nest_ptr=0 then build_page;
  end;
@z

@x [47.1101] l.21214 make_mark - pTeX: mark_node, prev_append
mark_ptr(p):=def_ref; link(tail):=p; tail:=p;
@y
inhibit_glue_flag:=false;
mark_ptr(p):=def_ref;
if not is_char_node(tail)and(type(tail)=disp_node) then
  prev_append(p)
else tail_append(p);
@z

@x [47.1103] l.21224 - pTeX: penalty, prev_append
procedure append_penalty;
begin scan_int; tail_append(new_penalty(cur_val));
if mode=vmode then build_page;
end;
@y
procedure append_penalty;
begin scan_int;
  inhibit_glue_flag:=false;
  if not is_char_node(tail)and(type(tail)=disp_node) then
    prev_append(new_penalty(cur_val))
  else tail_append(new_penalty(cur_val));
  if mode=vmode then build_page;
end;
@z

@x [47.1105] l.21246 - pTeX: delete_last: disp_node
@!m:quarterword; {the length of a replacement list}
@y
@!r:pointer; {running behind |p|}
@!fd:boolean; {a final |disp_node| pair?}
@!disp,@!pdisp:scaled; {displacement}
@!tx:pointer; {effective tail node}
@!m:quarterword; {the length of a replacement list}
@z

@x [47.1105] l.21250 - pTeX: delete_last: disp_node
else  begin if not is_char_node(tail) then if type(tail)=cur_chr then
    begin q:=head;
    repeat p:=q;
    if not is_char_node(q) then if type(q)=disc_node then
      begin for m:=1 to replace_count(q) do p:=link(p);
      if p=tail then return;
      end;
    q:=link(p);
    until q=tail;
    link(p):=null; flush_node_list(tail); tail:=p;
@y
else  begin check_effective_tail(return);
  if not is_char_node(tx) then if type(tx)=cur_chr then
    begin fetch_effective_tail(return);
    flush_node_list(tx);
@z

@x [47.1110] l.21310 -pTeX:  free box node, delete kanji_skip
var p:pointer; {the box}
@!c:box_code..copy_code; {should we copy?}
@y
var p:pointer; {the box}
@!c:box_code..copy_code; {should we copy?}
@!disp:scaled; {displacement}
@z

@x [47.1110] l.21314 unpackage - pTeX: free box node, delete kanji_skip
if (abs(mode)=mmode)or((abs(mode)=vmode)and(type(p)<>vlist_node))or@|
   ((abs(mode)=hmode)and(type(p)<>hlist_node)) then
  begin print_err("Incompatible list can't be unboxed");
@.Incompatible list...@>
  help3("Sorry, Pandora. (You sneaky devil.)")@/
  ("I refuse to unbox an \hbox in vertical mode or vice versa.")@/
  ("And I can't open any boxes in math mode.");@/
  error; return;
  end;
if c=copy_code then link(tail):=copy_node_list(list_ptr(p))
else  begin link(tail):=list_ptr(p); box(cur_val):=null;
  free_node(p,box_node_size);
  end;
@y
if type(p)=dir_node then p:=list_ptr(p);
if (abs(mode)=mmode)or((abs(mode)=vmode)and(type(p)<>vlist_node))or@|
    ((abs(mode)=hmode)and(type(p)<>hlist_node)) then
  begin print_err("Incompatible list can't be unboxed");
@.Incompatible list...@>
  help3("Sorry, Pandora. (You sneaky devil.)")@/
  ("I refuse to unbox an \hbox in vertical mode or vice versa.")@/
  ("And I can't open any boxes in math mode.");@/
  error; return;
end;
case abs(box_dir(p)) of
  any_dir:
    if abs(direction)<>abs(box_dir(p)) then begin
      print_err("Incompatible direction list can't be unboxed");
      help2("Sorry, Pandora. (You sneaky devil.)")@/
      ("I refuse to unbox a box in different direction.");@/
      error; return;
    end;
endcases;
disp:=0;
if c=copy_code then link(tail):=copy_node_list(list_ptr(p))
else
  begin if type(box(cur_val))=dir_node then
    begin delete_glue_ref(space_ptr(box(cur_val)));
    delete_glue_ref(xspace_ptr(box(cur_val)));
    free_node(box(cur_val),box_node_size);
    end;
  flush_node_list(link(p));
  link(tail):=list_ptr(p); box(cur_val):=null;
  delete_glue_ref(space_ptr(p));
  delete_glue_ref(xspace_ptr(p));
  free_node(p,box_node_size);
  end;
@z

@x [47.1110] l.22014 - pTeX: free box node, delete kanji_skip
while link(tail)<>null do tail:=link(tail);
@y
while link(tail)<>null do
  {reset |inhibit_glue_flag| when a node other than |disp_node| is found;
   |disp_node| is always inserted according to tex-jp-build issue 40}
  begin p:=tail; tail:=link(tail);
  if is_char_node(tail) then
    inhibit_glue_flag:=false
  else
    case type(tail) of
    glue_node : begin
      inhibit_glue_flag:=false;
      if (subtype(tail)=kanji_skip_code+1)
             or(subtype(tail)=xkanji_skip_code+1) then
        begin link(p):=link(tail);
        delete_glue_ref(glue_ptr(tail));
        free_node(tail,small_node_size); tail:=p;
        end;
      end;
    penalty_node : begin
      inhibit_glue_flag:=false;
      if subtype(tail)=widow_pena then
        begin link(p):=link(tail); free_node(tail,small_node_size);
        tail:=p;
        end;
      end;
    disp_node :
      begin prev_disp:=disp; disp:=disp_dimen(tail); prev_node:=p;
      end;
    othercases inhibit_glue_flag:=false;
    endcases;
  end;
@z

@x [47.1113] l.22028 - pTeX: italic correction, ita_kern
procedure append_italic_correction;
label exit;
var p:pointer; {|char_node| at the tail of the current list}
@!f:internal_font_number; {the font in the |char_node|}
begin if tail<>head then
  begin if is_char_node(tail) then p:=tail
  else if type(tail)=ligature_node then p:=lig_char(tail)
  else return;
  f:=font(p);
  tail_append(new_kern(char_italic(f)(char_info(f)(character(p)))));
  subtype(tail):=explicit;
  end;
@y
procedure append_italic_correction;
label exit;
var p:pointer; {|char_node| at the tail of the current list}
@!f:internal_font_number; {the font in the |char_node|}
@!d:pointer; {|disp_node|}
begin if tail<>head then
  begin
  if not is_char_node(tail)and(type(tail)=disp_node) then
    begin d:=tail; tail:=prev_node;
    end
  else d:=null;
  if (last_jchr<>null)and(link(last_jchr)=tail)and(is_char_node(tail)) then
    p:=last_jchr
  else if is_char_node(tail) then p:=tail
  else if type(tail)=ligature_node then p:=lig_char(tail)
  else return;
  f:=font(p);
  tail_append(new_kern(char_italic(f)(char_info(f)(character(p)))));
  subtype(tail):=ita_kern;
  if d<>null then
    begin prev_node:=tail; tail_append(d);
    end;
  end;
@z

@x [47.????] pTeX: reset inhibit_glue_flag at disc_node
procedure append_discretionary;
var c:integer; {hyphen character}
begin tail_append(new_disc);
@y
procedure append_discretionary;
var c:integer; {hyphen character}
begin tail_append(new_disc); inhibit_glue_flag:=false;
@z

@x pTeX: direction check in \discretionary 
@!n:integer; {length of discretionary list}
@y
@!n:integer; {length of discretionary list}
@!d:integer; {direction}
@z

@x pTeX: direction check in \discretionary 
p:=link(head); pop_nest;
case saved(-1) of
0:pre_break(tail):=p;
1:post_break(tail):=p;
@y
p:=link(head); d:=abs(direction); pop_nest;
case saved(-1) of
0:if abs(direction)=d then pre_break(tail):=p
  else begin 
    print_err("Direction Incompatible");
    help2("\discretionary's argument and outer hlist must have same direction.")@/
    ("I delete your first part."); error; pre_break(tail):=null; flush_node_list(p);
  end;
1:if abs(direction)=d then post_break(tail):=p
  else begin 
    print_err("Direction Incompatible");
    help2("\discretionary's argument and outer hlist must have same direction.")@/
    ("I delete your second part."); error; post_break(tail):=null; flush_node_list(p);
  end;
@z

@x pTeX: reset inhibit_glue_flag
push_nest; mode:=-hmode; space_factor:=1000;
@y
push_nest; mode:=-hmode; space_factor:=1000; inhibit_glue_flag:=false;
@z

@x pTeX: direction check in \discretionary 
else link(tail):=p;
if n<=max_quarterword then replace_count(tail):=n
@y
else if (n>0)and(abs(direction)<>d) then
  begin print_err("Direction Incompatible");
  help2("\discretionary's argument and outer hlist must have same direction.")@/
  ("I delete your third part."); flush_node_list(p); n:=0; error;
  end
else link(tail):=p;
if n<=max_quarterword then replace_count(tail):=n
@z 

@x [47.1120] l.22119 - pTeX: discretionary with disp_node
decr(save_ptr); return;
@y
decr(save_ptr);
prev_node:=tail; tail_append(get_node(small_node_size));
type(tail):=disp_node; disp_dimen(tail):=0; prev_disp:=0;
return;
@z

@x [47.1121] l.22127 - pTeX: discretionary with disp_node
  begin if not is_char_node(p) then if type(p)>rule_node then
    if type(p)<>kern_node then if type(p)<>ligature_node then
      begin print_err("Improper discretionary list");
@y
  begin if not is_char_node(p) then
    if (type(p)>rule_node)and(type(p)<>kern_node)and
         (type(p)<>ligature_node)and(type(p)<>disp_node) then
      if (type(p)=penalty_node)and(subtype(p)<>normal) then
        begin link(q):=link(p); free_node(p,small_node_size); p:=q;
        end
      else
        begin print_err("Improper discretionary list");
@z

@x [47.1123] l.22160 - pTeX: make_accent, Kanji, insert disp_node
var s,@!t: real; {amount of slant}
@y
var s,@!t: real; {amount of slant}
@!disp:scaled; {displacement}
@!cx:KANJI_code; {temporary register for KANJI}
@z

@x [47.1123] l.22165 - pTeX: make_accent, Kanji, insert disp_node
begin scan_char_num; f:=cur_font; p:=new_character(f,cur_val);
@y
begin scan_char_num;
if not is_char_ascii(cur_val) then
  begin KANJI(cx):=cur_val;
  if direction=dir_tate then f:=cur_tfont else f:=cur_jfont;
  p:=new_character(f,get_jfm_pos(KANJI(cx),f));
  if p<>null then
    begin
      link(p):=get_avail; info(link(p)):=KANJI(cx);
    end;
  end
else begin f:=cur_font; p:=new_character(f,cur_val);
  end;
@z

@x [47.1123] l.22175 - pTeX: make_accent, Kanji, insert disp_node
  link(tail):=p; tail:=p; space_factor:=1000;
@y
  link(tail):=p;
  if link(p)<>null then tail:=link(p) else tail:=p;
  @<Append |disp_node| at end of displace area@>;
  space_factor:=1000; inhibit_glue_flag:=false;
@z

@x [47.1124] l.22180 - pTeX: make_accent Kanji, insert disp_node
q:=null; f:=cur_font;
if (cur_cmd=letter)or(cur_cmd=other_char)or(cur_cmd=char_given) then
  q:=new_character(f,cur_chr)
else if cur_cmd=char_num then
  begin scan_char_num; q:=new_character(f,cur_val);
  end
else back_input
@y
q:=null; f:=cur_font; KANJI(cx):=empty;
if (cur_cmd=letter)or(cur_cmd=other_char) then
  q:=new_character(f,cur_chr)
else if (cur_cmd=kanji)or(cur_cmd=kana)or(cur_cmd=other_kchar) then
  begin  if direction=dir_tate then f:=cur_tfont else f:=cur_jfont;
  cx:=cur_chr;
  end
else if cur_cmd=char_given then
  if is_char_ascii(cur_chr) then q:=new_character(f,cur_chr)
  else begin
    if direction=dir_tate then f:=cur_tfont else f:=cur_jfont;
    KANJI(cx):=cur_chr
    end
  else if cur_cmd=char_num then
    begin scan_char_num;
    if is_char_ascii(cur_val) then q:=new_character(f,cur_val)
    else  begin
      if direction=dir_tate then f:=cur_tfont else f:=cur_jfont;
      KANJI(cx):=cur_val
    end
  end
else back_input;
if direction=dir_tate then
  begin if font_dir[f]=dir_tate then disp:=0
  else if font_dir[f]=dir_yoko then disp:=t_baseline_shift-y_baseline_shift
  else disp:=t_baseline_shift
  end
else  begin if font_dir[f]=dir_yoko then disp:=0
  else if font_dir[f]=dir_tate then disp:=y_baseline_shift-t_baseline_shift
  else disp:=y_baseline_shift
  end;
@<Append |disp_node| at begin of displace area@>;
if KANJI(cx)<>empty then
  begin q:=new_character(f,get_jfm_pos(KANJI(cx),f));
  link(q):=get_avail; info(link(q)):=KANJI(cx); last_jchr:=q;
  end;
@z

@x [47.1125] l.22200 - pTeX: make_accent Kanji
if h<>x then {the accent must be shifted up or down}
  begin p:=hpack(p,natural); shift_amount(p):=x-h;
  end;
@y
if h<>x then {the accent must be shifted up or down}
  begin delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
  cur_kanji_skip:=zero_glue; cur_xkanji_skip:=zero_glue;
  add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
  p:=hpack(p,natural); shift_amount(p):=x-h;
  end;
@z

@x [47.1125] pTeX: make accent Kanji
tail:=new_kern(-a-delta); subtype(tail):=acc_kern; link(p):=tail; p:=q;
@y
tail:=new_kern(-a-delta); subtype(tail):=acc_kern;
if h=x then begin
  if font_dir[font(p)]<>dir_default then link(link(p)):=tail
  else link(p):=tail; end
else link(p):=tail;
{ bugfix: if |p| is KANJI char, |link(p)|:=|tail| collapses |p| and kern after accent. }
p:=q;
@z

@x [48.1138] l.22385 - pTeX: init math : direction < 0 ... math direction
if (cur_cmd=math_shift)and(mode>0) then @<Go into display math mode@>
else  begin back_input; @<Go into ordinary math mode@>;
  end;
@y
if (cur_cmd=math_shift)and(mode>0) then @<Go into display math mode@>
else  begin back_input; @<Go into ordinary math mode@>;
  end;
direction:=-abs(direction);
@z

@x [48.1145] l.22435 - pTeX: Call adjust_hlist at begin of display
else  begin line_break(display_widow_penalty);@/
@y
else  begin adjust_hlist(head,true); line_break(display_widow_penalty);@/
@z

@x [48.1147] l.22471 - pTeX: Skip kanji 2nd node, dir_node
reswitch: if is_char_node(p) then
  begin f:=font(p); d:=char_width(f)(char_info(f)(character(p)));
  goto found;
  end;
case type(p) of
hlist_node,vlist_node,rule_node: begin d:=width(p); goto found;
  end;
@y
reswitch: if is_char_node(p) then
  begin f:=font(p); d:=char_width(f)(orig_char_info(f)(character(p)));
  if font_dir[f]<>dir_default then p:=link(p);
  goto found;
  end;
case type(p) of
hlist_node,vlist_node,dir_node,rule_node: begin d:=width(p); goto found;
  end;
@z

@x [48.1150] l.22541 - pTeX: scan_math
mmode+left_brace: begin tail_append(new_noad);
  back_input; scan_math(nucleus(tail));
  end;
@y
mmode+left_brace: begin tail_append(new_noad);
  back_input; scan_math(nucleus(tail),kcode_noad(tail));
  end;
@z

@x [48.1151] l.22555 - pTeX: scan_math: use Kanji in math_mode
procedure scan_math(@!p:pointer);
label restart,reswitch,exit;
var c:integer; {math character code}
begin restart:@<Get the next non-blank non-relax...@>;
reswitch:case cur_cmd of
letter,other_char,char_given: begin c:=ho(math_code(cur_chr));
    if c=@'100000 then
      begin @<Treat |cur_chr| as an active character@>;
      goto restart;
      end;
    end;
@y
procedure scan_math(@!p,@!q:pointer);
label restart,reswitch,exit;
var c:integer; {math character code}
cx:KANJI_code; {temporary register for KANJI}
begin KANJI(cx):=0;
restart: @<Get the next non-blank non-relax...@>;
reswitch:case cur_cmd of
letter,other_char,char_given:
  if (is_char_ascii(cur_chr) or (cur_chr=256)) then begin
    c:=ho(math_code(cur_chr));
    if c=@'100000 then
      begin @<Treat |cur_chr| as an active character@>;
      goto restart;
      end;
    end
  else
    KANJI(cx):=cur_chr;
kanji,kana,other_kchar: cx:=cur_chr;
@z

@x [48.1151] l.22576 - pTeX: scan_math: use Kanji in math_mode
math_type(p):=math_char; character(p):=qi(c mod 256);
if (c>=var_code)and fam_in_range then fam(p):=cur_fam
else fam(p):=(c div 256) mod 16;
@y
if KANJI(cx)=0 then
  begin math_type(p):=math_char; character(p):=qi(c mod 256);
  if (c>=var_code)and(fam_in_range) then fam(p):=cur_fam
  else fam(p):=(c div 256) mod 16;
  if font_dir[fam_fnt(fam(p)+cur_size)]<>dir_default then
    begin print_err("Not one-byte family");
    help1("IGNORE.");@/
    error;
    end
  end
else  begin
  if q=null then
    begin math_type(p):=sub_mlist; info(p):=new_noad;
    p:=nucleus(info(p)); q:=kcode_noad_nucleus(p);
    end;
  math_type(p):=math_jchar; fam(p):=cur_jfam; character(p):=qi(0);
  math_kcode(p-1):=KANJI(cx);
  if font_dir[fam_fnt(fam(p)+cur_size)]=dir_default then
    begin print_err("Not two-byte family");
    help1("IGNORE.");@/
    error;
    end
  end;
@z

@x [48.1154] l.22605 - pTeX: math mode
mmode+letter,mmode+other_char,mmode+char_given:
  set_math_char(ho(math_code(cur_chr)));
mmode+char_num: begin scan_char_num; cur_chr:=cur_val;
  set_math_char(ho(math_code(cur_chr)));
  end;
@y
mmode+letter,mmode+other_char,mmode+char_given:
  if is_char_ascii(cur_chr) then
    if cur_chr<128 then set_math_char(ho(math_code(cur_chr)))
    else set_math_char(cur_chr)
  else set_math_kchar(cur_chr);
mmode+kanji,mmode+kana,mmode+other_kchar: begin
    cx:=cur_chr; set_math_kchar(KANJI(cx));
  end;
mmode+char_num: begin scan_char_num; cur_chr:=cur_val;
  if is_char_ascii(cur_chr) then
    if cur_chr<128 then set_math_char(ho(math_code(cur_chr)))
    else set_math_char(cur_chr)
  else set_math_kchar(cur_chr);
  end;
@z

@x [48.1155] l.22635 - pTeX: set_math_char
  link(tail):=p; tail:=p;
@y
  link(tail):=p; tail:=p;
  if font_dir[fam_fnt(fam(nucleus(p))+cur_size)]<>dir_default then begin
    print_err("Not one-byte family");
    help1("IGNORE.");@/
    error;
  end;
@z

@x [48.1158] l.22690 - pTeX: scan_math
  type(tail):=cur_chr; scan_math(nucleus(tail));
@y
  type(tail):=cur_chr; scan_math(nucleus(tail),kcode_noad(tail));
@z

@x [48.1163] l.22750 - pTeX: scan_math
scan_delimiter(left_delimiter(tail),true); scan_math(nucleus(tail));
@y
scan_delimiter(left_delimiter(tail),true);
scan_math(nucleus(tail),kcode_noad(tail));
@z

@x [48.1164] l.22770 - pTeX: scan_math
scan_math(nucleus(tail));
@y
scan_math(nucleus(tail),kcode_noad(tail));
@z

@x [48.1164] l.22790 - pTeX: vcenter : dir
vcenter_group: begin end_graf; unsave; save_ptr:=save_ptr-2;
  p:=vpack(link(head),saved(1),saved(0)); pop_nest;
  tail_append(new_noad); type(tail):=vcenter_noad;
  math_type(nucleus(tail)):=sub_box; info(nucleus(tail)):=p;
  end;
@y
vcenter_group: begin end_graf; unsave; save_ptr:=save_ptr-2;
  p:=vpack(link(head),saved(1),saved(0));
  set_box_dir(p)(direction); pop_nest;
  if abs(box_dir(p))<>abs(direction) then p:=new_dir_node(p,abs(direction));
  tail_append(new_noad); type(tail):=vcenter_noad;
  math_type(nucleus(tail)):=sub_box; info(nucleus(tail)):=p;
  end;
@z

@x [48.1176] l.22864 - pTeX: scan_math
scan_math(p);
@y
scan_math(p,null);
@z

@x [48.1186] l.23006 - pTeX: copy kanji code
     if math_type(supscr(p))=empty then
      begin mem[saved(0)].hh:=mem[nucleus(p)].hh;
@y
     if ((math_type(supscr(p))=empty)and(math_kcode(p)=null)) then
      begin mem[saved(0)].hh:=mem[nucleus(p)].hh;
@z

@x [48.1194] l.23078 - pTeX: set cur_kanji_skip, cur_xkanji_skip
var l:boolean; {`\.{\\leqno}' instead of `\.{\\eqno}'}
@y
var l:boolean; {`\.{\\leqno}' instead of `\.{\\eqno}'}
@!disp:scaled; {displacement}
@z

@x [48.1194] l.23087 - pTeX: set cur_kanji_skip, cur_xkanji_skip
m:=mode; l:=false; p:=fin_mlist(null); {this pops the nest}
@y
delete_glue_ref(cur_kanji_skip); delete_glue_ref(cur_xkanji_skip);
if auto_spacing>0 then cur_kanji_skip:=kanji_skip
else cur_kanji_skip:=zero_glue;
if auto_xspacing>0 then cur_xkanji_skip:=xkanji_skip
else cur_xkanji_skip:=zero_glue;
add_glue_ref(cur_kanji_skip); add_glue_ref(cur_xkanji_skip);
m:=mode; l:=false; p:=fin_mlist(null); {this pops the nest}
@z

@x [48.1196] l.23134 - pTeX: insert disp_node
begin tail_append(new_math(math_surround,before));
cur_mlist:=p; cur_style:=text_style; mlist_penalties:=(mode>0); mlist_to_hlist;
link(tail):=link(temp_head);
while link(tail)<>null do tail:=link(tail);
tail_append(new_math(math_surround,after));
space_factor:=1000; unsave;
end
@y
begin if direction=dir_tate then disp:=t_baseline_shift
      else disp:=y_baseline_shift;
@<Append |disp_node| at begin of displace area@>;
tail_append(new_math(math_surround,before));
cur_mlist:=p; cur_style:=text_style; mlist_penalties:=(mode>0); mlist_to_hlist;
link(tail):=link(temp_head);
while link(tail)<>null do tail:=link(tail);
tail_append(new_math(math_surround,after));
@<Append |disp_node| at end of displace area@>;
space_factor:=1000; inhibit_glue_flag:=false; unsave;
end
@z

@x [48.1200] l.23203 - pTeX: adjust direction
push_nest; mode:=hmode; space_factor:=1000; set_cur_lang; clang:=cur_lang;
@y
push_nest; adjust_dir:=direction; inhibit_glue_flag:=false;
mode:=hmode; space_factor:=1000; set_cur_lang; clang:=cur_lang;
@z

@x [48.1201] l.23217 - pTeX: free box node
  begin free_node(b,box_node_size);
@y
  begin delete_glue_ref(space_ptr(b)); delete_glue_ref(xspace_ptr(b));
  free_node(b,box_node_size);
@z

@x [48.1201] l.23222 - pTeX: free box node
    begin free_node(b,box_node_size);
@y
    begin delete_glue_ref(space_ptr(b)); delete_glue_ref(xspace_ptr(b));
    free_node(b,box_node_size);
@z

@x [49.1210] l.23361 - pTeX: set_auto_spacing
any_mode(toks_register),
any_mode(assign_toks),
any_mode(assign_int),
@y
any_mode(assign_kinsoku),
any_mode(assign_inhibit_xsp_code),
any_mode(set_auto_spacing),
any_mode(set_kansuji_char),
any_mode(toks_register),
any_mode(assign_toks),
any_mode(assign_int),
any_mode(def_jfont),
any_mode(def_tfont),
@z

@x [49.1211] l.23397 - pTeX: prefixed_command
procedure prefixed_command;
label done,exit;
var a:small_number; {accumulated prefix codes so far}
@y
procedure prefixed_command;
label done,exit;
var a:small_number; {accumulated prefix codes so far}
@!m:integer; {ditto}
@z

@x [49.1217] l.23487 - pTeX: select cur font
set_font: define(cur_font_loc,data,cur_chr);
@y
set_font: begin
  if font_dir[cur_chr]=dir_yoko then
    define(cur_jfont_loc,data,cur_chr)
  else if font_dir[cur_chr]=dir_tate then
    define(cur_tfont_loc,data,cur_chr)
  else
    define(cur_font_loc,data,cur_chr)
end;
@z

@x l.23504 - pTeX
primitive("futurelet",let,normal+1);@/
@!@:future_let_}{\.{\\futurelet} primitive@>

@ @<Cases of |print_cmd_chr|...@>=
let: if chr_code<>normal then print_esc("futurelet")@+else print_esc("let");

@ @<Assignments@>=
let:  begin n:=cur_chr;
@y
primitive("futurelet",let,normal+1);@/
@!@:future_let_}{\.{\\futurelet} primitive@>

@ @<Cases of |print_cmd_chr|...@>=
let: if chr_code<>normal then print_esc("futurelet")@+else print_esc("let");

@ @<Assignments@>=
let:  begin n:=cur_chr;
@z

@x [49.1228] l.23785 - pTeX: assign jfam
assign_int: begin p:=cur_chr; scan_optional_equals; scan_int;
  word_define(p,cur_val);
  end;
@y
assign_int: begin p:=cur_chr; scan_optional_equals; scan_int;
  if p=int_base+cur_fam_code then
    begin if font_dir[fam_fnt(cur_val)]<>dir_default then
      word_define(int_base+cur_jfam_code,cur_val)
    else word_define(p,cur_val);
    end
  else word_define(p,cur_val);
  end;
@z

@x [49.1230] l.23812 - pTeX: xspcode, kcatcode
@<Put each...@>=
primitive("catcode",def_code,cat_code_base);
@!@:cat_code_}{\.{\\catcode} primitive@>
@y
@<Put each...@>=
primitive("catcode",def_code,cat_code_base);
@!@:cat_code_}{\.{\\catcode} primitive@>
primitive("kcatcode",def_code,kcat_code_base);
@!@:cat_code_}{\.{\\kcatcode} primitive@>
primitive("xspcode",def_code,auto_xsp_code_base);
@!@:auto_xsp_code_}{\.{\\xspcode} primitive@>
@z

@x [49.1231] l.23842 - pTeX: xspcode, kcatcode
def_code: if chr_code=cat_code_base then print_esc("catcode")
  else if chr_code=math_code_base then print_esc("mathcode")
@y
def_code: if chr_code=cat_code_base then print_esc("catcode")
  else if chr_code=kcat_code_base then print_esc("kcatcode")
  else if chr_code=auto_xsp_code_base then print_esc("xspcode")
  else if chr_code=math_code_base then print_esc("mathcode")
@z

@x [49.1232] l.23857 - pTeX: kcatcode
def_code: begin @<Let |n| be the largest legal code value, based on |cur_chr|@>;
  p:=cur_chr; scan_char_num; p:=p+cur_val; scan_optional_equals;
  scan_int;
  if ((cur_val<0)and(p<del_code_base))or(cur_val>n) then
    begin print_err("Invalid code ("); print_int(cur_val);
@.Invalid code@>
    if p<del_code_base then print("), should be in the range 0..")
    else print("), should be at most ");
    print_int(n);
    help1("I'm going to use 0 instead of that illegal code value.");@/
    error; cur_val:=0;
    end;
  if p<math_code_base then define(p,data,cur_val)
  else if p<del_code_base then define(p,data,hi(cur_val))
  else word_define(p,cur_val);
  end;
@y
def_code: begin
  @<Let |m| be the minimal legal code value, based on |cur_chr|@>;
  @<Let |n| be the largest legal code value, based on |cur_chr|@>;
  p:=cur_chr;
  if p=kcat_code_base then
    begin scan_char_num; p:=p+kcatcodekey(cur_val) end
  else begin scan_ascii_num; p:=p+cur_val; end;
  scan_optional_equals; scan_int;
  if ((cur_val<m)and(p<del_code_base))or(cur_val>n) then
  begin print_err("Invalid code ("); print_int(cur_val);
@.Invalid code@>
    if p<del_code_base then
      begin print("), should be in the range "); print_int(m); print("..");
      end
    else print("), should be at most ");
    print_int(n);
    if m=0 then
      begin help1("I'm going to use 0 instead of that illegal code value.");@/
      error;
      end
    else
      begin help1("I'm going to use 16 instead of that illegal code value.");@/
      error;
      end;
    cur_val:=m;
  end;
  if p<math_code_base then define(p,data,cur_val)
  else if p<del_code_base then define(p,data,hi(cur_val))
  else word_define(p,cur_val);
  end;
@z

@x [49.1233] l.23882 - pTeX: kcatcode
@ @<Let |n| be the largest...@>=
if cur_chr=cat_code_base then n:=max_char_code
@y
@ @<Let |m| be the minimal...@>=
if cur_chr=kcat_code_base then m:=kanji else m:=0

@ @<Let |n| be the largest...@>=
if cur_chr=cat_code_base then n:=invalid_char {1byte |max_char_code|}
else if cur_chr=kcat_code_base then n:=max_char_code
@z

@x [49.1247] l.24083 - pTeX: alter_box_dimen : box_dir
procedure alter_box_dimen;
var c:small_number; {|width_offset| or |height_offset| or |depth_offset|}
@y
procedure alter_box_dimen;
var c:small_number; {|width_offset| or |height_offset| or |depth_offset|}
@!p,q:pointer; {temporary registers}
@z
@x [49.1247] l.24087 - pTeX: alter_box_dimen : box_dir
scan_normal_dimen;
if box(b)<>null then mem[box(b)+c].sc:=cur_val;
end;
@y
scan_normal_dimen;
if box(b)<>null then
  begin q:=box(b); p:=link(q);
  while p<>null do
    begin if abs(direction)=abs(box_dir(p)) then q:=p;
    p:=link(p);
    end;
  if abs(box_dir(q))<>abs(direction) then
    begin p:=link(box(b)); link(box(b)):=null;
    q:=new_dir_node(q,abs(direction)); list_ptr(q):=null;
    link(q):=p; link(box(b)):=q;
    end;
    mem[q+c].sc:=cur_val;
  end;
end;
@z

@x [49.1256] l.24163 - pTeX: def_tfont
def_font: new_font(a);
@y
def_tfont,def_jfont,def_font: new_font(a);
@z

@x [49.1292] l.24451 - pTeX: shift_case
@<Change the case of the token in |p|, if a change is appropriate@>=
t:=info(p);
if t<cs_token_flag+single_base then
  begin c:=t mod 256;
  if equiv(b+c)<>0 then info(p):=t-c+equiv(b+c);
  end
@y
@<Change the case of the token in |p|, if a change is appropriate@>=
t:=info(p);
if (t<cs_token_flag+single_base)and(not check_kanji(t)) then
  begin c:=t mod 256;
  if equiv(b+c)<>0 then info(p):=t-c+equiv(b+c);
  end
@z

@x [49.1291] l.24467 - pTeX: show_mode
@d show_lists=3 { \.{\\showlists} }
@y
@d show_lists=3 { \.{\\showlists} }
@d show_mode=4 { \.{\\showmode} }
@z

@x [49.1291] l.24476 - pTeX: show_mode
primitive("showlists",xray,show_lists);
@!@:show_lists_}{\.{\\showlists} primitive@>
@y
primitive("showlists",xray,show_lists);
@!@:show_lists_}{\.{\\showlists} primitive@>
primitive("showmode",xray,show_mode);
@!@:show_mode_}{\.{\\showmode} primitive@>
@z

@x [49.1292] l.24483 - pTeX: show_mode
  othercases print_esc("show")
@y
  show_mode:print_esc("showmode");
  othercases print_esc("show")
@z

@x [49.1293] l.24495 - pTeX: show_mode
show_code: @<Show the current meaning of a token, then |goto common_ending|@>;
@y
show_code: @<Show the current meaning of a token, then |goto common_ending|@>;
show_mode: @<Show the current japanese processing mode@>;
@z

@x
libc_free(format_engine);@/
@y
libc_free(format_engine);@/
dump_kanji(fmt_file);
@z

@x
libc_free(format_engine);
@y
libc_free(format_engine);
undump_kanji(fmt_file);
@z

@x l.24982
font_info:=xmalloc_array(fmemory_word, font_mem_size);
@y
font_info:=xmalloc_array(memory_word, font_mem_size);
@z

@x [50.1320] l.24988 - pTeX:
@ @<Dump the array info for internal font number |k|@>=
begin
dump_things(font_check[null_font], font_ptr+1-null_font);
@y
@ @<Dump the array info for internal font number |k|@>=
begin
dump_things(font_dir[null_font], font_ptr+1-null_font);
dump_things(font_num_ext[null_font], font_ptr+1-null_font);
dump_things(font_check[null_font], font_ptr+1-null_font);
@z

@x [50.1321] l.25000 - pTeX:
dump_things(char_base[null_font], font_ptr+1-null_font);
@y
dump_things(ctype_base[null_font], font_ptr+1-null_font);
dump_things(char_base[null_font], font_ptr+1-null_font);
@z

@x [50.1322] l.25024 - pTeX:
@<Undump the array info for internal font number |k|@>=
begin {Allocate the font arrays}
@y
@<Undump the array info for internal font number |k|@>=
begin {Allocate the font arrays}
font_dir:=xmalloc_array(eight_bits, font_max);
font_num_ext:=xmalloc_array(integer, font_max);
@z

@x [50.1322] l.25040 - pTeX:
char_base:=xmalloc_array(integer, font_max);
@y
ctype_base:=xmalloc_array(integer, font_max);
char_base:=xmalloc_array(integer, font_max);
@z

@x [50.1322] l.25050 - pTeX:
undump_things(font_check[null_font], font_ptr+1-null_font);
@y
undump_things(font_dir[null_font], font_ptr+1-null_font);
undump_things(font_num_ext[null_font], font_ptr+1-null_font);
undump_things(font_check[null_font], font_ptr+1-null_font);
@z

@x [50.1322] l.25064 - pTeX:
undump_things(char_base[null_font], font_ptr+1-null_font);
@y
undump_things(ctype_base[null_font], font_ptr+1-null_font);
undump_things(char_base[null_font], font_ptr+1-null_font);
@z

@x l.25363 - pTeX
  font_info:=xmalloc_array (fmemory_word, font_mem_size);
@y
  font_info:=xmalloc_array (memory_word, font_mem_size);
@z

@x [51.1337] l.25563 - pTeX:
  font_check:=xmalloc_array(four_quarters, font_max);
@y
  font_dir:=xmalloc_array(eight_bits, font_max);
  font_num_ext:=xmalloc_array(integer, font_max);
  font_check:=xmalloc_array(four_quarters, font_max);
@z

@x [51.1337] l.25577 - pTeX:
  char_base:=xmalloc_array(integer, font_max);
@y
  ctype_base:=xmalloc_array(integer, font_max);
  char_base:=xmalloc_array(integer, font_max);
@z

@x [51.1337] l.25587 - pTeX:
  font_ptr:=null_font; fmem_ptr:=7;
@y
  font_ptr:=null_font; fmem_ptr:=7;
  font_dir[null_font]:=dir_default;
  font_num_ext[null_font]:=0;
@z

@x [51.1337] l.25594 - pTeX:
  char_base[null_font]:=0; width_base[null_font]:=0;
@y
  ctype_base[null_font]:=0; char_base[null_font]:=0; width_base[null_font]:=0;
@z

@x [53.????] do_extension, inhibit_glue_flag
begin case cur_chr of
open_node:@<Implement \.{\\openout}@>;
@y
begin inhibit_glue_flag:=false;
case cur_chr of
open_node:@<Implement \.{\\openout}@>;
@z

@x [53.1376] l.26309 - pTeX:
@<Glob...@> =
@!debug_format_file: boolean;
@y
@<Glob...@> =
@!debug_format_file: boolean;

@ @<Set init...@>=
@!debug debug_format_file:=true; @+gubed;
@z

@x l.26984 - pTeX
@* \[54] System-dependent changes.
@y
@* \[55/\pTeX] System-dependent changes for \pTeX.
This section described extended variables, procesures, functions and so on
for \pTeX.

@<Declare procedures that scan font-related stuff@>=
function get_jfm_pos(@!kcode:KANJI_code;@!f:internal_font_number):eight_bits;
var @!jc:KANJI_code; {temporary register for KANJI}
@!sp,@!mp,@!ep:pointer;
begin@/
if f=null_font then
  begin get_jfm_pos:=kchar_type(null_font)(0); return;
  end;
jc:=toDVI(kcode);
sp:=1; { start position }
ep:=font_num_ext[f]-1; { end position }
if (ep>=1)and(kchar_code(f)(sp)<=jc)and(jc<=kchar_code(f)(ep)) then
  begin while (sp <= ep) do
    begin mp:=sp+((ep-sp) div 2);
    if jc<kchar_code(f)(mp) then ep:=mp-1
    else if jc>kchar_code(f)(mp) then sp:=mp+1
    else
      begin get_jfm_pos:=kchar_type(f)(mp); return;
      end;
    end;
  end;
get_jfm_pos:=kchar_type(f)(0);
end;

@ Following codes are used to calculate a KANJI width and height.

@<Local variables for dimension calculations@>=
@!t: eight_bits;

@ @<The KANJI width for |cur_jfont|@>=
if direction=dir_tate then
  v:=char_width(cur_tfont)(orig_char_info(cur_tfont)(qi(0)))
else
  v:=char_width(cur_jfont)(orig_char_info(cur_jfont)(qi(0)))

@ @<The KANJI height for |cur_jfont|@>=
if direction=dir_tate then begin
  t:=height_depth(orig_char_info(cur_tfont)(qi(0)));
  v:=char_height(cur_tfont)(t)+char_depth(cur_tfont)(t);
end else begin
  t:=height_depth(orig_char_info(cur_jfont)(qi(0)));
  v:=char_height(cur_jfont)(t)+char_depth(cur_jfont)(t);
end

@ set a kansuji character.

@ @<Put each...@>=
primitive("kansujichar",set_kansuji_char,0);
@!@:kansujichar_}{\.{\\kansujichar} primitive@>

@ @<Cases of |print_cmd_chr|...@>=
set_kansuji_char: print_esc("kansujichar");

@ @<Assignments@>=
set_kansuji_char:
begin p:=cur_chr; scan_int; n:=cur_val; scan_optional_equals; scan_int;
if not is_char_kanji(cur_val) then
  begin print_err("Invalid KANSUJI char (");
  print_hex(cur_val); print_char(")");
@.Invalid KANSUJI char@>
  help1("I'm skipping this control sequences.");@/
  error; return;
  end
else if (n<0)or(n>9) then
  begin print_err("Invalid KANSUJI number ("); print_int(n); print_char(")");
@.Invalid KANSUJI number@>
  help1("I'm skipping this control sequences.");@/
  error; return;
  end
else
  define(kansuji_base+n,n,tokanji(toDVI(cur_val)));
end;

@ |print_kansuji| procedure converts a number to KANJI number.

@ @<Declare procedures needed in |scan_something_internal|@>=
procedure print_kansuji(@!n:integer);
var @!k:0..23; {index to current digit; we assume that $|n|<10^{23}$}
@!cx: KANJI_code; {temporary register for KANJI}
begin k:=0;
  if n<0 then return; {nonpositive input produces no output}
  repeat dig[k]:=n mod 10; n:=n div 10; incr(k);
  until n=0;
  begin while k>0 do
    begin decr(k);
	cx:=kansuji_char(dig[k]);
	print_kanji(fromDVI(cx));
    end;
  end;
end;

@ \pTeX\ inserts a glue specified by \.{\\kanjiskip} between 2byte-characters,
automatically, if \.{\\autospacing}.  This glue is suppressed by
\.{\\noautospacing}.
\.{\\xkanjiskip}, \.{\\noautoxspacing}, \.{\\autoxspacing}, \.{\\xspcode} is
used to control between 2byte and 1byte characters.

@d reset_auto_spacing_code=0
@d set_auto_spacing_code=1
@d reset_auto_xspacing_code=2
@d set_auto_xspacing_code=3

@<Put each...@>=
primitive("autospacing",set_auto_spacing,set_auto_spacing_code);
@!@:auto_spacing_}{\.{\\autospacing} primitive@>
primitive("noautospacing",set_auto_spacing,reset_auto_spacing_code);
@!@:no_auto_spacing_}{\.{\\noautospacing} primitive@>
primitive("autoxspacing",set_auto_spacing,set_auto_xspacing_code);
@!@:auto_xspacing_}{\.{\\autoxspacing} primitive@>
primitive("noautoxspacing",set_auto_spacing,reset_auto_xspacing_code);
@!@:no_auto_xspacing_}{\.{\\noautoxspacing} primitive@>

@ @<Cases of |print_cmd_chr|...@>=
set_auto_spacing:begin
  if (chr_code mod 2)=0 then print_esc("noauto") else print_esc("auto");
  if chr_code<2 then print("spacing") else print("xspacing");
end;

@ @<Assignments@>=
set_auto_spacing:begin
  if cur_chr<2 then p:=auto_spacing_code
  else begin p:=auto_xspacing_code; cur_chr:=(cur_chr mod 2); end;
  define(p,data,cur_chr);
end;

@ Following codes are used in section 49.

@<Show the current japanese processing mode@>=
begin print_nl("> ");
if auto_spacing>0 then print("auto spacing mode; ")
  else print("no auto spacing mode; ");
print_nl("> ");
if auto_xspacing>0 then print("auto xspacing mode")
  else print("no auto xspacing mode");
goto common_ending;
end

@ The \.{\\inhibitglue} primitive control to insert a glue specified
JFM (Japanese Font Metic) file.  The \.{\\inhibitxspcode} is used to control
inserting a space between 2byte-char and 1byte-char.

@d inhibit_both=0     {disable to insert space before 2byte-char and after it}
@d inhibit_previous=1 {disable to insert space before 2byte-char}
@d inhibit_after=2    {disable to insert space after 2byte-char}
@d inhibit_none=3     {enable to insert space before/after 2byte-char}
@d inhibit_unused=4   {unused entry}
@d no_entry=1000
@d new_pos=0
@d cur_pos=1

@ @<Cases of |main_control| that don't...@>=
  any_mode(inhibit_glue): inhibit_glue_flag:=(cur_chr=0);

@ @<Put each...@>=
primitive("inhibitglue",inhibit_glue,0);
@!@:inhibit_glue_}{\.{\\inhibitglue} primitive@>
primitive("disinhibitglue",inhibit_glue,1);
@!@:dis_inhibit_glue_}{\.{\\disinhibitglue} primitive@>
primitive("inhibitxspcode",assign_inhibit_xsp_code,inhibit_xsp_code_base);
@!@:inhibit_xsp_code_}{\.{\\inhibitxspcode} primitive@>

@ @<Cases of |print_cmd_chr|...@>=
inhibit_glue: if (chr_code>0) then print_esc("disinhibitglue")
  else print_esc("inhibitglue");
assign_inhibit_xsp_code: print_esc("inhibitxspcode");

@ @<Declare procedures needed in |scan_something_internal|@>=
function get_inhibit_pos(c:KANJI_code; n:small_number):pointer;
label done, done1;
var p,s:pointer;
begin s:=calc_pos(c); p:=s;
if n=new_pos then
  begin repeat
  if (inhibit_xsp_type(p)=inhibit_unused)or(inhibit_xsp_code(p)=0)
    or(inhibit_xsp_code(p)=c) then goto done;
  incr(p); if p>255 then p:=0;
  until s=p; p:=no_entry;
  end
else
  begin repeat
  if inhibit_xsp_code(p)=0 then goto done1
  else if (inhibit_xsp_type(p)<>inhibit_unused)and(inhibit_xsp_code(p)=c) then goto done;
  incr(p); if p>255 then p:=0;
  until s=p;
done1: p:=no_entry;
  end;
done: get_inhibit_pos:=p;
end;

@ @<Assignments@>=
assign_inhibit_xsp_code:
begin p:=cur_chr; scan_int; n:=cur_val; scan_optional_equals; scan_int;
if is_char_kanji(n) then
  begin j:=get_inhibit_pos(tokanji(n),new_pos);
  if (j<>no_entry)and(cur_val>inhibit_after) then
    begin if global or(cur_level=level_one) then cur_val:=inhibit_unused
      { remove the entry from inhibit table }
	else cur_val:=inhibit_none; end
  else if j=no_entry then
    begin print_err("Inhibit table is full!!");
    help1("I'm skipping this control sequences.");@/
    error; return; end;
  define(inhibit_xsp_code_base+j,cur_val,n);
  end
else
  begin print_err("Invalid KANJI code ("); print_hex(n); print_char(")");
@.Invalid KANJI code@>
  help1("I'm skipping this control sequences.");@/
  error; return;
  end;
end;

@ @<Fetch inhibit type from some table@>=
begin scan_int; q:=get_inhibit_pos(tokanji(cur_val),cur_pos);
cur_val_level:=int_val; cur_val:=inhibit_none;
if q<>no_entry then cur_val:=inhibit_xsp_type(q);
end

@ The \.{\\prebreakpenalty} is used to specified amount of penalties inserted
before the 2byte-char which is first argument of this primitive.
The \.{\\postbreakpenalty} is inserted after the 2byte-char.

@d pre_break_penalty_code=1
@d post_break_penalty_code=2
@d kinsoku_unused_code=3

@<Put each...@>=
primitive("prebreakpenalty",assign_kinsoku,pre_break_penalty_code);
@!@:pre_break_penalty_}{\.{\\prebreakpenalty} primitive@>
primitive("postbreakpenalty",assign_kinsoku,post_break_penalty_code);
@!@:post_break_penalty_}{\.{\\postbreakpenalty} primitive@>

@ @<Cases of |print_cmd_chr|...@>=
assign_kinsoku: case chr_code of
  pre_break_penalty_code: print_esc("prebreakpenalty");
  post_break_penalty_code: print_esc("postbreakpenalty");
  endcases;

@ @<Declare procedures needed in |scan_something_internal|@>=
function get_kinsoku_pos(c:KANJI_code; n:small_number):pointer;
label done, done1;
var p,s:pointer;
begin s:=calc_pos(c); p:=s;
@!debug
print_ln; print("c:="); print_int(c); print(", p:="); print_int(s);
if p+kinsoku_base<0 then
  begin print("p is negative value"); print_ln;
  end;
gubed
if n=new_pos then
  begin repeat
  if (kinsoku_type(p)=0)or(kinsoku_type(p)=kinsoku_unused_code)
    or(kinsoku_code(p)=c) then goto done;
  incr(p); if p>255 then p:=0;
  until s=p;
  p:=no_entry;
  end
else
  begin repeat
  if kinsoku_type(p)=0 then goto done1
  else if (kinsoku_type(p)<>kinsoku_unused_code)and(kinsoku_code(p)=c) then goto done;
  incr(p); if p>255 then p:=0;
  until s=p;
done1: p:=no_entry;
  end;
done: get_kinsoku_pos:=p;
end;

@ @<Assignments@>=
assign_kinsoku:
begin p:=cur_chr; scan_int; n:=cur_val; scan_optional_equals; scan_int;
if is_char_ascii(n) or is_char_kanji(n) then
  begin j:=get_kinsoku_pos(tokanji(n),new_pos);
  if (j<>no_entry)and(cur_val=0)and(global or(cur_level=level_one)) then
    define(kinsoku_base+j,kinsoku_unused_code,0) { remove the entry from KINSOKU table }
  else begin
    if j=no_entry then begin
      print_err("KINSOKU table is full!!");
      help1("I'm skipping this control sequences.");@/
      error; return; end;
    if (p=pre_break_penalty_code)or(p=post_break_penalty_code) then
      begin define(kinsoku_base+j,p,tokanji(n));
      word_define(kinsoku_penalty_base+j,cur_val);
      end
    else confusion("kinsoku");
@:this can't happen kinsoku}{\quad kinsoku@>
    end
  end
else
  begin print_err("Invalid KANJI code for ");
  if p=pre_break_penalty_code then print("pre")
  else if p=post_break_penalty_code then print("post")
  else print_char("?");
  print("breakpenalty ("); print_hex(n); print_char(")");
@.Invalid KANJI code@>
  help1("I'm skipping this control sequences.");@/
  error; return;
  end;
end;

@ @<Fetch breaking penalty from some table@>=
begin scan_int; q:=get_kinsoku_pos(tokanji(cur_val),cur_pos);
cur_val_level:=int_val; cur_val:=0;
if (q<>no_entry)and(m=kinsoku_type(q)) then
    scanned_result(kinsoku_penalty(q))(int_val);
end

@ Following codes are used in |main_control|.

@<Insert kinsoku penalty@>=
begin kp:=get_kinsoku_pos(cx,cur_pos);
if kp<>no_entry then if kinsoku_penalty(kp)<>0 then
  begin if kinsoku_type(kp)=pre_break_penalty_code then
    begin if not is_char_node(cur_q)and(type(cur_q)=penalty_node) then
      penalty(cur_q):=penalty(cur_q)+kinsoku_penalty(kp)
    else
      begin main_p:=link(cur_q); link(cur_q):=new_penalty(kinsoku_penalty(kp));
      subtype(link(cur_q)):=kinsoku_pena; link(link(cur_q)):=main_p;
      end;
    end
  else if kinsoku_type(kp)=post_break_penalty_code then
    begin tail_append(new_penalty(kinsoku_penalty(kp)));
    subtype(tail):=kinsoku_pena;
    end;
  end;
end;

@ @<Insert |pre_break_penalty| of |cur_chr|@>=
begin kp:=get_kinsoku_pos(cur_chr,cur_pos);
if kp<>no_entry then if kinsoku_penalty(kp)<>0 then
  begin if kinsoku_type(kp)=pre_break_penalty_code then
    if not is_char_node(tail)and(type(tail)=penalty_node) then
      penalty(tail):=penalty(tail)+kinsoku_penalty(kp)
    else
      begin tail_append(new_penalty(kinsoku_penalty(kp)));
      subtype(tail):=kinsoku_pena;
      end;
  end;
end;

@ @<Insert |post_break_penalty|@>=
begin kp:=get_kinsoku_pos(cx,cur_pos);
if kp<>no_entry then if kinsoku_penalty(kp)<>0 then
  begin if kinsoku_type(kp)=post_break_penalty_code then
    begin tail_append(new_penalty(kinsoku_penalty(kp)));
    subtype(tail):=kinsoku_pena;
    end;
  end;
end;

@ This is a part of section 32.

The procedure |synch_dir| is used in |hlist_out| and |vlist_out|.

@d dvi_yoko=0
@d dvi_tate=1
@d dvi_dtou=3

@<Glob...@>=
@!dvi_dir:integer; {a \.{DVI} reader program thinks we direct to}
@!cur_dir_hv:integer; {\TeX\ thinks we direct to}
@!page_dir:eight_bits;

@ @<Set init...@>=
page_dir:=dir_yoko;

@ @<Declare procedures needed in |hlist_out|, |vlist_out|@>=
procedure synch_dir;
var tmp:scaled; {temporary resister}
begin
  case cur_dir_hv of
  dir_yoko:
    if dvi_dir<>cur_dir_hv then begin
      synch_h; synch_v; dvi_out(dirchg); dvi_out(dvi_yoko);
      dir_used:=true;
      case dvi_dir of
        dir_tate: begin tmp:=cur_h; cur_h:=-cur_v; cur_v:=tmp end;
        dir_dtou: begin tmp:=cur_h; cur_h:=cur_v; cur_v:=-tmp end;
      endcases;
      dvi_h:=cur_h; dvi_v:=cur_v; dvi_dir:=cur_dir_hv;
    end;
  dir_tate:
    if dvi_dir<>cur_dir_hv then begin
      synch_h; synch_v; dvi_out(dirchg); dvi_out(dvi_tate);
      dir_used:=true;
      case dvi_dir of
        dir_yoko: begin tmp:=cur_h; cur_h:=cur_v; cur_v:=-tmp end;
        dir_dtou: begin cur_v:=-cur_v; cur_h:=-cur_h; end;
      endcases;
      dvi_h:=cur_h; dvi_v:=cur_v; dvi_dir:=cur_dir_hv;
    end;
  dir_dtou:
    if dvi_dir<>cur_dir_hv then begin
      synch_h; synch_v; dvi_out(dirchg); dvi_out(dvi_dtou);
      dir_used:=true;
      case dvi_dir of
        dir_yoko: begin tmp:=cur_h; cur_h:=-cur_v; cur_v:=tmp end;
        dir_tate: begin cur_v:=-cur_v; cur_h:=-cur_h; end;
      endcases;
      dvi_h:=cur_h; dvi_v:=cur_v; dvi_dir:=cur_dir_hv;
    end;
  othercases
    confusion("synch_dir");
  endcases
end;

@ This function is called from |adjust_hlist| to check, whether
a list which pointed |box_p| contains a printing character.
If the list contains such a character, then return `true', otherwise `false'.
If the first matter is a character, |first_char| is stored it.
|last_char| is stored a last character.  If no printing characters exist
in the list, |first_char| and |last_char| is null.
@^recursion@>

Note that |first_char| and |last_char| may be |math_node|.

@<Glob...@>=
@!first_char:pointer; {first printable character}
@!last_char:pointer; {last printable character}
@!find_first_char:boolean; {find for a first printable character?}

@ @<Declare procedures needed in |hlist_out|, |vlist_out|@>=
function check_box(box_p:pointer):boolean;
label done;
var @!p:pointer; {run through the current box}
@!flag:boolean; {found any printable character?}
begin flag:=false; p:=box_p;
while p<>null do
  begin if is_char_node(p) then
    repeat
    if find_first_char then
      begin first_char:=p; find_first_char:=false
      end;
    last_char:=p; flag:=true;
    if font_dir[font(p)]<>dir_default then p:=link(p);
    p:=link(p);
    if p=null then goto done;
    until not is_char_node(p);
  case type(p) of
  hlist_node:
    begin flag:=true;
      if shift_amount(p)=0 then
        begin if check_box(list_ptr(p)) then flag:=true;
        end
      else if find_first_char then find_first_char:=false
        else last_char:=null;
    end;
  ligature_node: if check_box(lig_ptr(p)) then flag:=true;
  ins_node,disp_node,mark_node,adjust_node,whatsit_node,penalty_node:
    do_nothing;
  math_node:
    if (subtype(p)=before)or(subtype(p)=after) then 
      begin if find_first_char then
        begin find_first_char:=false; first_char:=p; 
        end;
        last_char:=p; flag:=true;
      end
    else do_nothing; {\.{\\beginR} etc.}
  kern_node:
    if subtype(p)=acc_kern then
      begin p:=link(p);
        if is_char_node(p) then
	  if font_dir[font(p)]<>dir_default then p:=link(p);
        p:=link(link(p));
        if find_first_char then
          begin find_first_char:=false; first_char:=p;
          end;
        last_char:=p; flag:=true;
        if font_dir[font(p)]<>dir_default then p:=link(p);
        end
    else
      begin flag:=true;
        if find_first_char then find_first_char:=false
        else last_char:=null;
        end;
  othercases begin flag:=true;
    if find_first_char then find_first_char:=false
    else last_char:=null;
    end;
  endcases;
  p:=link(p);
  end;
done: check_box:=flag;
end;

@ Following procedure |adjust_hlist| inserts \.{\\xkanjiskip} between
2byte-char and 1byte-char in hlist which pointed |p|.
Note that the skip is inserted into a place where too difficult to decide
whether inserting or not (i.e, before penalty, after penalty).

If |pf| is true then insert |jchr_widow_penalty| that is penalty for
creating a widow KANJI character line.

@d no_skip=0
@d after_schar=1 {denote after single byte character}
@d after_wchar=2 {denote after double bytes character}

@<Declare procedures needed in |hlist_out|, |vlist_out|@>=
procedure adjust_hlist(p:pointer;pf:boolean);
label exit;
var q,s,t,u,v,x,z:pointer;
  i,k:halfword;
  a: pointer; { temporary pointer for accent }
  insert_skip:no_skip..after_wchar;
  cx:KANJI_code; {temporary register for KANJI character}
  ax:ASCII_code; {temporary register for ASCII character}
  do_ins:boolean; {for inserting |xkanji_skip| into previous (or after) KANJI}
begin if link(p)=null then goto exit;
if auto_spacing>0 then
  begin delete_glue_ref(space_ptr(p)); space_ptr(p):=kanji_skip;
  add_glue_ref(kanji_skip);
  end;
if auto_xspacing>0 then
  begin delete_glue_ref(xspace_ptr(p)); xspace_ptr(p):=xkanji_skip;
  add_glue_ref(xkanji_skip);
  end;
u:=space_ptr(p); add_glue_ref(u);
s:=xspace_ptr(p); add_glue_ref(s);
if not is_char_node(link(p)) then
  if (type(link(p))=glue_node)and(subtype(link(p))=jfm_skip+1) then
  begin v:=link(p); link(p):=link(v);
  fast_delete_glue_ref(glue_ptr(v)); free_node(v,small_node_size);
  end
  else if (type(link(p))=penalty_node)and(subtype(link(p))=kinsoku_pena) then
    begin v:=link(link(p));
    if (not is_char_node(v)) and (type(v)=glue_node)and(subtype(v)=jfm_skip+1) then
      begin link(link(p)):=link(v);
      fast_delete_glue_ref(glue_ptr(v)); free_node(v,small_node_size);
      end
    end;

i:=0; insert_skip:=no_skip; p:=link(p); v:=p; q:=p;
while p<>null do
  begin if is_char_node(p) then
    begin repeat @<Insert a space around the character |p|@>;
      q:=p; p:=link(p); incr(i);
      if (i>5)and pf then
        begin if is_char_node(v) then
        if font_dir[font(v)]<>dir_default then v:=link(v);
        v:=link(v);
        end;
    until not is_char_node(p);
    end
  else
    begin case type(p) of
    hlist_node: @<Insert hbox surround spacing@>;
    ligature_node: @<Insert ligature surround spacing@>;
    penalty_node,disp_node: @<Insert penalty or displace surround spacing@>;
    kern_node: if subtype(p)=explicit then insert_skip:=no_skip
      else if subtype(p)=acc_kern then begin
        { When we insert \.{\\xkanjiskip}, we first ignore accent (and kerns) and
          insert \.{\\xkanjiskip}, then we recover the accent. }
        if q=p then begin t:=link(p);
          { if p is beginning on the list, we have only to ignore nodes. }
          if is_char_node(t) then
            if font_dir[font(t)]<>dir_default then t:=link(t);
          p:=link(link(t));
	  if font_dir[font(p)]<>dir_default then
            begin p:=link(p); insert_skip:=after_wchar; end
          else  insert_skip:=after_schar;
          end
        else begin
          a:=p; t:=link(p);
          if is_char_node(t) then
            if font_dir[font(t)]<>dir_default then t:=link(t);
          t:=link(link(t)); link(q):=t; p:=t;
          @<Insert a space around the character |p|@>; incr(i);
          if (i>5)and pf then
            begin if is_char_node(v) then
            if font_dir[font(v)]<>dir_default then v:=link(v);
            v:=link(v);
            end;
          if link(q)<>t then link(link(q)):=a else link(q):=a;
          end;
        end;
    math_node: @<Insert math surround spacing@>;
    mark_node,adjust_node,ins_node,whatsit_node:
      {These nodes are vanished when typeset is done}
      do_nothing;
    othercases insert_skip:=no_skip;
    endcases;
    q:=p; p:=link(p);
    end;
  end;
if not is_char_node(q)and(type(q)=glue_node)and(subtype(q)=jfm_skip+1) then
  begin fast_delete_glue_ref(glue_ptr(q));
  glue_ptr(q):=zero_glue; add_glue_ref(zero_glue);
  end;
delete_glue_ref(u); delete_glue_ref(s);
if (v<>null)and pf and(i>5) then @<Make |jchr_widow_penalty| node@>;
exit:
end;

@ @<Insert a space around the character |p|@>=
if font_dir[font(p)]<>dir_default then
  begin KANJI(cx):=info(link(p));
  if insert_skip=after_schar then @<Insert ASCII-KANJI spacing@>;
  p:=link(p); insert_skip:=after_wchar;
  end
else
  begin ax:=qo(character(p));
  if insert_skip=after_wchar then @<Insert KANJI-ASCII spacing@>;
  if auto_xsp_code(ax)>=2 then
    insert_skip:=after_schar else insert_skip:=no_skip;
  end

@ @<Insert hbox surround spacing@>=
begin find_first_char:=true; first_char:=null; last_char:=null;
if shift_amount(p)=0 then
  begin if check_box(list_ptr(p)) then
    begin if first_char<>null then @<Insert a space before the |first_char|@>;
    if last_char<>null then
      begin @<Insert a space after the |last_char|@>;
      end else insert_skip:=no_skip;
    end else insert_skip:=no_skip;
  end else insert_skip:=no_skip;
end

@ @<Insert a space before the |first_char|@>=
if type(first_char)=math_node then
  begin ax:=qo("0");
  if insert_skip=after_wchar then @<Insert KANJI-ASCII spacing@>;
  end
else if font_dir[font(first_char)]<>dir_default then
  begin KANJI(cx):=info(link(first_char));
  if insert_skip=after_schar then @<Insert ASCII-KANJI spacing@>
  else if insert_skip=after_wchar then @<Insert KANJI-KANJI spacing@>;
  end
else
  begin ax:=qo(character(first_char));
  if insert_skip=after_wchar then @<Insert KANJI-ASCII spacing@>;
  end;

@ @<Insert a space after the |last_char|@>=
if type(last_char)=math_node then
  begin ax:=qo("0");
  if auto_xsp_code(ax)>=2 then
    insert_skip:=after_schar else insert_skip:=no_skip;
  end
else if font_dir[font(last_char)]<>dir_default then
  begin insert_skip:=after_wchar; KANJI(cx):=info(link(last_char));
  if is_char_node(link(p))and(font_dir[font(link(p))]<>dir_default) then
    begin @<Append KANJI-KANJI spacing@>; p:=link(p);
    end;
  end
else
  begin ax:=qo(character(last_char));
  if auto_xsp_code(ax)>=2 then
    insert_skip:=after_schar else insert_skip:=no_skip;
  end;

@ @<Insert math surround spacing@>=
begin if (subtype(p)=before)and(insert_skip=after_wchar) then
  begin ax:=qo("0"); @<Insert KANJI-ASCII spacing@>;
  insert_skip:=no_skip;
  end
else if subtype(p)=after then
  begin ax:=qo("0"); 
  if auto_xsp_code(ax)>=2 then
    insert_skip:=after_schar else insert_skip:=no_skip;
  end
else insert_skip:=no_skip;
end

@ @<Insert ligature surround spacing@>=
begin t:=lig_ptr(p);
if is_char_node(t) then
  begin ax:=qo(character(t));
  if insert_skip=after_wchar then @<Insert KANJI-ASCII spacing@>;
  while link(t)<>null do t:=link(t);
  if is_char_node(t) then
    begin ax:=qo(character(t));
    if auto_xsp_code(ax)>=2 then
      insert_skip:=after_schar else insert_skip:=no_skip;
    end;
  end;
end

@ @<Insert penalty or displace surround spacing@>=
begin if is_char_node(link(p)) then
  begin q:=p; p:=link(p);
  if font_dir[font(p)]<>dir_default then
    begin KANJI(cx):=info(link(p));
    if insert_skip=after_schar then @<Insert ASCII-KANJI spacing@>
    else if insert_skip=after_wchar then @<Insert KANJI-KANJI spacing@>;
    p:=link(p); insert_skip:=after_wchar;
    end
  else
    begin ax:=qo(character(p));
    if insert_skip=after_wchar then @<Insert KANJI-ASCII spacing@>;
    if auto_xsp_code(ax)>=2 then
      insert_skip:=after_schar else insert_skip:=no_skip;
    end;
  end
end

@ @<Insert ASCII-KANJI spacing@>=
begin
  begin x:=get_inhibit_pos(cx,cur_pos);
  if x<>no_entry then
    if (inhibit_xsp_type(x)=inhibit_both)or
       (inhibit_xsp_type(x)=inhibit_previous) then
      do_ins:=false else do_ins:=true
  else do_ins:=true;
  end;
if do_ins then
  begin z:=new_glue(s); subtype(z):=xkanji_skip_code+1;
  link(z):=link(q); link(q):=z; q:=z;
  end;
end

@ @<Insert KANJI-ASCII spacing@>=
begin if (auto_xsp_code(ax) mod 2)=1 then
  begin x:=get_inhibit_pos(cx,cur_pos);
  if x<>no_entry then
    if (inhibit_xsp_type(x)=inhibit_both)or
       (inhibit_xsp_type(x)=inhibit_after) then
      do_ins:=false else do_ins:=true
  else do_ins:=true;
  end
else do_ins:=false;
if do_ins then
  begin z:=new_glue(s); subtype(z):=xkanji_skip_code+1;
  link(z):=link(q); link(q):=z; q:=z;
  end;
end

@ @<Insert KANJI-KANJI spacing@>=
begin z:=new_glue(u); subtype(z):=kanji_skip_code+1;
link(z):=link(q); link(q):=z; q:=z;
end

@ @<Append KANJI-KANJI spacing@>=
begin z:=new_glue(u); subtype(z):=kanji_skip_code+1;
link(z):=link(p); link(p):=z; p:=link(z); q:=z;
end

@ @<Make |jchr_widow_penalty| node@>=
begin q:=v; p:=link(v);
if is_char_node(v)and(font_dir[font(v)]<>dir_default) then
  begin q:=p; p:=link(p);
  end;
t:=q; s:=null;
@<Seek list and make |t| pointing widow penalty position@>;
if s<>null then
  begin s:=link(t);
    if not is_char_node(s)and(type(s)=penalty_node) then
      penalty(s):=penalty(s)+jchr_widow_penalty
    else if jchr_widow_penalty<>0 then
      begin s:=new_penalty(jchr_widow_penalty); subtype(s):=widow_pena;
      link(s):=link(t); link(t):=s; t:=link(s);
      while(not is_char_node(t)) do
        begin if (type(t)=glue_node)or(type(t)=kern_node) then goto exit;
        t:=link(t);
        end;
      z:=new_glue(u); subtype(z):=kanji_skip_code+1;
      link(z):=link(s); link(s):=z;
      end;
  end;
end;

@ @<Seek list and make |t| pointing widow penalty position@>=
while(p<>null) do
begin if is_char_node(p) then
  begin if font_dir[font(p)]<>dir_default then
    begin KANJI(cx):=info(link(p)); i:=kcat_code(kcatcodekey(cx)); k:=0;
    if (i=kanji)or(i=kana) then begin t:=q; s:=p; end;
    p:=link(p); q:=p;
    end
  else begin k:=k+1;
    if k>1 then begin q:=p; s:=null; end;
    end;
  end
else begin case type(p) of
  penalty_node,mark_node,adjust_node,whatsit_node,
  glue_node,kern_node,math_node,disp_node:
    do_nothing;
  othercases begin q:=p; s:=null; end;
  endcases;
  end;
p:=link(p);
end

@ @<Declare procedures needed in |hlist_out|, |vlist_out|@>=
procedure dir_out;
var @!this_box: pointer; {pointer to containing box}
begin this_box:=temp_ptr;
  temp_ptr:=list_ptr(this_box);
  if (type(temp_ptr)<>hlist_node)and(type(temp_ptr)<>vlist_node) then
    confusion("dir_out");
  case abs(box_dir(this_box)) of
  dir_yoko:
    case abs(box_dir(temp_ptr)) of
    dir_tate: {Tate in Yoko}
      begin cur_v:=cur_v-height(this_box); cur_h:=cur_h+depth(temp_ptr) end;
    dir_dtou: {DtoU in Yoko}
      begin cur_v:=cur_v+depth(this_box); cur_h:=cur_h+height(temp_ptr) end;
    endcases;
  dir_tate:
    case abs(box_dir(temp_ptr)) of
    dir_yoko: {Yoko in Tate}
      begin cur_v:=cur_v+depth(this_box); cur_h:=cur_h+height(temp_ptr) end;
    dir_dtou: {DtoU in Tate}
      begin
        cur_v:=cur_v+depth(this_box)-height(temp_ptr);
        cur_h:=cur_h+width(temp_ptr)
      end;
    endcases;
  dir_dtou:
    case abs(box_dir(temp_ptr)) of
    dir_yoko: {Yoko in DtoU}
      begin cur_v:=cur_v-height(this_box); cur_h:=cur_h+depth(temp_ptr) end;
    dir_tate: {Tate in DtoU}
      begin
        cur_v:=cur_v+depth(this_box)-height(temp_ptr);
        cur_h:=cur_h+width(temp_ptr)
      end;
    endcases;
  endcases;
  cur_dir_hv:=abs(box_dir(temp_ptr));
  if type(temp_ptr)=vlist_node then vlist_out@+else hlist_out;
end;

@ These routines are used to output diagnostic which related direction.

@ @<Basic printing procedures@>=
procedure print_dir(@!dir:eight_bits); {prints |dir| data}
begin if dir=dir_yoko then print_char("Y")
else if dir=dir_tate then print_char("T")
else if dir=dir_dtou then print_char("D")
end;
@#
procedure print_direction(@!d:integer); {print the direction represented by d}
begin case abs(d) of
dir_yoko: print("yoko");
dir_tate: print("tate");
dir_dtou: print("dtou");
end;
if d<0 then print("(math)");
print(" direction");
end;

@ The procedure |set_math_kchar| is same as |set_math_char| which is
written in section 48.

@<Declare act...@>=
procedure set_math_kchar(@!c:integer);
var p:pointer; {the new noad}
begin p:=new_noad; math_type(nucleus(p)):=math_jchar;
character(nucleus(p)):=qi(0);
math_kcode(p):=c; fam(nucleus(p)):=cur_jfam;
if font_dir[fam_fnt(fam(nucleus(p))+cur_size)]=dir_default then
  begin print_err("Not two-byte family");
  help1("IGNORE.");@/
  error;
  end;
type(p):=ord_noad;
link(tail):=p; tail:=p;
end;

@ This section is a part of |main_control|.

@<Append KANJI-character |cur_chr| ...@>=
if is_char_node(tail) then
  begin if not( (last_jchr<>null) and (link(last_jchr)=tail) ) then
    begin cx:=qo(character(tail)); @<Insert |post_break_penalty|@>;
    end;
  end
else if type(tail)=ligature_node then
  begin cx:=qo(character(lig_char(tail))); @<Insert |post_break_penalty|@>;
  end;
if direction=dir_tate then
  begin if font_dir[main_f]=dir_tate then disp:=0
  else if font_dir[main_f]=dir_yoko then disp:=t_baseline_shift-y_baseline_shift
  else disp:=t_baseline_shift;
  main_f:=cur_tfont;
  end
else
  begin if font_dir[main_f]=dir_yoko then disp:=0
  else if font_dir[main_f]=dir_tate then disp:=y_baseline_shift-t_baseline_shift
  else disp:=y_baseline_shift;
  main_f:=cur_jfont;
  end;
@<Append |disp_node| at end of displace area@>;
ins_kp:=false; ligature_present:=false;
cur_l:=qi(get_jfm_pos(KANJI(cur_chr),main_f));
main_i:=orig_char_info(main_f)(qi(0));
goto main_loop_j+3;
@#
main_loop_j+1: space_factor:=1000;
  if main_f<>null_font then
    begin if not disp_called then
      begin prev_node:=tail; tail_append(get_node(small_node_size));
      type(tail):=disp_node; disp_dimen(tail):=0; disp_called:=true
	  end;
	fast_get_avail(main_p); font(main_p):=main_f; character(main_p):=cur_l;
    link(tail):=main_p; tail:=main_p; last_jchr:=tail;
    fast_get_avail(main_p); info(main_p):=KANJI(cur_chr);
    link(tail):=main_p; tail:=main_p;
    cx:=cur_chr; @<Insert kinsoku penalty@>;
  end;
  ins_kp:=false;
again_2:
  get_next;
  main_i:=orig_char_info(main_f)(cur_l);
  case cur_cmd of
    kanji,kana,other_kchar: begin
      cur_l:=qi(get_jfm_pos(KANJI(cur_chr),main_f)); goto main_loop_j+3;
      end;
    letter,other_char: begin ins_kp:=true; cur_l:=qi(0); goto main_loop_j+3;
      end;
  endcases;
  x_token;
  case cur_cmd of
    kanji,kana,other_kchar: cur_l:=qi(get_jfm_pos(KANJI(cur_chr),main_f));
    letter,other_char: begin ins_kp:=true; cur_l:=qi(0); end;
    char_given: begin
      if is_char_ascii(cur_chr) then
        begin ins_kp:=true; cur_l:=qi(0);
        end
      else cur_l:=qi(get_jfm_pos(KANJI(cur_chr),main_f));
      end;
    char_num: begin scan_char_num; cur_chr:=cur_val;
      if is_char_ascii(cur_chr) then
        begin ins_kp:=true; cur_l:=qi(0);
        end
      else cur_l:=qi(get_jfm_pos(KANJI(cur_chr),main_f));
      end;
    inhibit_glue: begin inhibit_glue_flag:=(cur_chr=0); goto again_2; end;
    othercases begin ins_kp:=max_halfword;
      cur_l:=qi(-1); cur_r:=non_char; lig_stack:=null;
      end;
  endcases;
@#
main_loop_j+3:
  if ins_kp=true then @<Insert |pre_break_penalty| of |cur_chr|@>;
  if main_f<>null_font then 
    begin @<Look ahead for glue or kerning@>;
    end
  else inhibit_glue_flag:=false;
  if ins_kp=false then begin { Kanji -> Kanji }
    goto main_loop_j+1;
  end else if ins_kp=true then begin { Kanji -> Ascii }
    {@@<Append |disp_node| at begin of displace area@@>;}
    ins_kp:=false; goto main_loop;
  end else begin { Kanji -> cs }
    {@@<Append |disp_node| at begin of displace area@@>;}
    goto reswitch;
  end;

@ @<Append |disp_node| at begin ...@>=
begin if not is_char_node(tail)and(type(tail)=disp_node) then
  begin if prev_disp=disp then
    begin free_node(tail,small_node_size); tail:=prev_node; link(tail):=null;
    end
  else disp_dimen(tail):=disp;
  end
else
  if disp<>0 or not disp_called then
    begin prev_node:=tail; tail_append(get_node(small_node_size));
    type(tail):=disp_node; disp_dimen(tail):=disp; prev_disp:=disp;
	disp_called:=true
    end;
end;

@ @<Append |disp_node| at end ...@>=
if disp<>0 then
begin if not is_char_node(tail)and(type(tail)=disp_node) then
  begin disp_dimen(tail):=0;
  end
else
  begin prev_node:=tail; tail_append(get_node(small_node_size));
  type(tail):=disp_node; disp_dimen(tail):=0; prev_disp:=disp;
  disp_called:=true
  end;
end;

@ @<Look ahead for glue or kerning@>=
cur_q:=tail;
if inhibit_glue_flag<>true then
  begin { print("IF");print_int(cur_l); }
  if cur_l<qi(0) then cur_l:=qi(0) else inhibit_glue_flag:=false;
  if (tail=link(head))and(not is_char_node(tail))and(type(tail)=disp_node) then
    goto skip_loop
  else begin if char_tag(main_i)=gk_tag then
    begin main_k:=glue_kern_start(main_f)(main_i);
    main_j:=font_info[main_k].qqqq;
    if skip_byte(main_j)>stop_flag then {huge glue/kern table rearranged}
      begin main_k:=glue_kern_restart(main_f)(main_j);
        main_j:=font_info[main_k].qqqq;
        end;
    loop@+begin if next_char(main_j)=cur_l then if skip_byte(main_j)<=stop_flag then
      begin if op_byte(main_j)<kern_flag then
        begin gp:=font_glue[main_f]; cur_r:=rem_byte(main_j);
        if gp<>null then
          begin while((type(gp)<>cur_r)and(link(gp)<>null)) do gp:=link(gp);
          gq:=glue_ptr(gp);
          end
        else
          begin gp:=get_node(small_node_size); font_glue[main_f]:=gp;
          gq:=null;
          end;
        if gq=null then
          begin type(gp):=cur_r; gq:=new_spec(zero_glue);
          glue_ptr(gp):=gq;
          main_k:=exten_base[main_f]+qi((qo(cur_r))*3);
          width(gq):=font_info[main_k].sc;
          stretch(gq):=font_info[main_k+1].sc;
          shrink(gq):=font_info[main_k+2].sc;
          add_glue_ref(gq); link(gp):=get_node(small_node_size);
          gp:=link(gp); glue_ptr(gp):=null; link(gp):=null;
          end;
        tail_append(new_glue(gq)); subtype(tail):=jfm_skip+1;
        goto skip_loop;
        end
      else  begin
        tail_append(new_kern(char_kern(main_f)(main_j)));
        goto skip_loop;
        end;
    end;
    if skip_byte(main_j)>=stop_flag then goto skip_loop;
    main_k:=main_k+qo(skip_byte(main_j))+1; {SKIP property}
    main_j:=font_info[main_k].qqqq;
    end;
  end;
  end;
end
else
  begin { print("IT");print_int(cur_l); }
  if cur_l<qi(0) then cur_l:=qi(0) else inhibit_glue_flag:=false;
  end;
skip_loop: do_nothing;

@ @<Basic printing...@>=
procedure print_kanji(@!s:KANJI_code); {prints a single character}
begin
if s>255 then
  begin print_char(Hi(s)); print_char(Lo(s));
  end else print_char(s);
end;

@ This procedure changes the direction of the page, if |page_contents|
is |empty| and ``recent contributions'' does not contain any boxes,
rules nor insertions.

@<Declare act...@>=
procedure change_page_direction(@!d: halfword);
label done;
var p: pointer; flag:boolean;
begin flag:=(page_contents=empty);
if flag and (head<>tail) then begin
  p:=link(head);
  while p<>null do
    case type(p) of
      hlist_node,vlist_node,dir_node,rule_node,ins_node:
        begin flag:=false; goto done; end;
      { |glue_node|, |kern_node|, |penalty_node| are discarded }
      othercases p:=link(p);
    endcases;
  done: do_nothing;
end;
if flag then begin direction:=d; page_dir:=d; end
else begin
  print_err("Use `"); print_cmd_chr(cur_cmd,d);
  print("' at top of the page");
  help3("You can change the direction of the page only when")
  ("the current page and recent contributions consist of only")
  ("marks and whatsits."); error;
  end;
end;

@* \[56] System-dependent changes.
@z