aboutsummaryrefslogtreecommitdiff
path: root/tools/bison++/texinfo.tex
blob: 3aae14df06d7b911e8b89c94ef2db2b5b2187e1f (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
%% TeX macros to handle texinfo files

%   Copyright (C) 1985, 86, 88, 90, 91, 92, 1993 Free Software Foundation, Inc.

%This texinfo.tex file is free software; you can redistribute it and/or
%modify it under the terms of the GNU General Public License as
%published by the Free Software Foundation; either version 2, or (at
%your option) any later version.

%This texinfo.tex file is distributed in the hope that it will be
%useful, but WITHOUT ANY WARRANTY; without even the implied warranty
%of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
%General Public License for more details.

%You should have received a copy of the GNU General Public License
%along with this texinfo.tex file; see the file COPYING.  If not, write
%to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
%USA.


%In other words, you are welcome to use, share and improve this program.
%You are forbidden to forbid anyone else to use, share and improve
%what you give them.   Help stamp out software-hoarding!

\def\texinfoversion{2.112}
\message{Loading texinfo package [Version \texinfoversion]:}

% Print the version number if in a .fmt file.
\everyjob{\message{[Texinfo version \texinfoversion]}\message{}}

% Save some parts of plain tex whose names we will redefine.

\let\ptexlbrace=\{
\let\ptexrbrace=\}
\let\ptexdots=\dots
\let\ptexdot=\.
\let\ptexstar=\*
\let\ptexend=\end
\let\ptexbullet=\bullet
\let\ptexb=\b
\let\ptexc=\c
\let\ptexi=\i
\let\ptext=\t
\let\ptexl=\l
\let\ptexL=\L

\def\tie{\penalty 10000\ }     % Save plain tex definition of ~.

\message{Basics,}
\chardef\other=12

% If this character appears in an error message or help string, it
% starts a new line in the output.
\newlinechar = `^^J

% Ignore a token.
%
\def\gobble#1{}

\hyphenation{ap-pen-dix}
\hyphenation{mini-buf-fer mini-buf-fers}
\hyphenation{eshell}

% Margin to add to right of even pages, to left of odd pages.
\newdimen \bindingoffset  \bindingoffset=0pt
\newdimen \normaloffset   \normaloffset=\hoffset
\newdimen\pagewidth \newdimen\pageheight
\pagewidth=\hsize \pageheight=\vsize

% Sometimes it is convenient to have everything in the transcript file
% and nothing on the terminal.  We don't just call \tracingall here,
% since that produces some useless output on the terminal.
%
\def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
\def\loggingall{\tracingcommands2 \tracingstats2
   \tracingpages1 \tracingoutput1 \tracinglostchars1
   \tracingmacros2 \tracingparagraphs1 \tracingrestores1
   \showboxbreadth\maxdimen\showboxdepth\maxdimen
}%

%---------------------Begin change-----------------------
%
%%%% For @cropmarks command.
% Dimensions to add cropmarks at corners Added by P. A. MacKay, 12 Nov. 1986
%
\newdimen\cornerlong \newdimen\cornerthick
\newdimen \topandbottommargin
\newdimen \outerhsize \newdimen \outervsize
\cornerlong=1pc\cornerthick=.3pt	% These set size of cropmarks
\outerhsize=7in
%\outervsize=9.5in
% Alternative @smallbook page size is 9.25in
\outervsize=9.25in
\topandbottommargin=.75in
%
%---------------------End change-----------------------

% \onepageout takes a vbox as an argument.  Note that \pagecontents
% does insertions itself, but you have to call it yourself.
\chardef\PAGE=255  \output={\onepageout{\pagecontents\PAGE}}
\def\onepageout#1{\hoffset=\normaloffset
\ifodd\pageno  \advance\hoffset by \bindingoffset
\else \advance\hoffset by -\bindingoffset\fi
{\escapechar=`\\\relax % makes sure backslash is used in output files.
\shipout\vbox{{\let\hsize=\pagewidth \makeheadline} \pagebody{#1}%
{\let\hsize=\pagewidth \makefootline}}}%
\advancepageno \ifnum\outputpenalty>-20000 \else\dosupereject\fi}

%%%% For @cropmarks command %%%%

% Here is a modification of the main output routine for Near East Publications
% This provides right-angle cropmarks at all four corners.
% The contents of the page are centerlined into the cropmarks,
% and any desired binding offset is added as an \hskip on either
% site of the centerlined box.  (P. A. MacKay, 12 November, 1986)
%
\def\croppageout#1{\hoffset=0pt % make sure this doesn't mess things up
{\escapechar=`\\\relax % makes sure backslash is used in output files.
		 \shipout
		 \vbox to \outervsize{\hsize=\outerhsize
                 \vbox{\line{\ewtop\hfill\ewtop}}
                 \nointerlineskip
                 \line{\vbox{\moveleft\cornerthick\nstop}
                       \hfill
                       \vbox{\moveright\cornerthick\nstop}}
                 \vskip \topandbottommargin
                 \centerline{\ifodd\pageno\hskip\bindingoffset\fi
			\vbox{
			{\let\hsize=\pagewidth \makeheadline}
			\pagebody{#1}
			{\let\hsize=\pagewidth \makefootline}}
			\ifodd\pageno\else\hskip\bindingoffset\fi}
		 \vskip \topandbottommargin plus1fill minus1fill
                 \boxmaxdepth\cornerthick
                 \line{\vbox{\moveleft\cornerthick\nsbot}
                       \hfill
                       \vbox{\moveright\cornerthick\nsbot}}
                 \nointerlineskip
                 \vbox{\line{\ewbot\hfill\ewbot}}
	}}
  \advancepageno
  \ifnum\outputpenalty>-20000 \else\dosupereject\fi}
%
% Do @cropmarks to get crop marks
\def\cropmarks{\let\onepageout=\croppageout }

\def\pagebody#1{\vbox to\pageheight{\boxmaxdepth=\maxdepth #1}}
{\catcode`\@ =11
\gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
\dimen@=\dp#1 \unvbox#1
\ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
\ifr@ggedbottom \kern-\dimen@ \vfil \fi}
}

%
% Here are the rules for the cropmarks.  Note that they are
% offset so that the space between them is truly \outerhsize or \outervsize
% (P. A. MacKay, 12 November, 1986)
%
\def\ewtop{\vrule height\cornerthick depth0pt width\cornerlong}
\def\nstop{\vbox
  {\hrule height\cornerthick depth\cornerlong width\cornerthick}}
\def\ewbot{\vrule height0pt depth\cornerthick width\cornerlong}
\def\nsbot{\vbox
  {\hrule height\cornerlong depth\cornerthick width\cornerthick}}

% Parse an argument, then pass it to #1.  The argument is the rest of
% the input line (except we remove a trailing comment).  #1 should be a
% macro which expects an ordinary undelimited TeX argument.
%
\def\parsearg#1{%
  \let\next = #1%
  \begingroup
    \obeylines
    \futurelet\temp\parseargx
}

% If the next token is an obeyed space (from an @example environment or
% the like), remove it and recurse.  Otherwise, we're done.
\def\parseargx{%
  % \obeyedspace is defined far below, after the definition of \sepspaces.
  \ifx\obeyedspace\temp
    \expandafter\parseargdiscardspace
  \else
    \expandafter\parseargline
  \fi
}

% Remove a single space (as the delimiter token to the macro call).
{\obeyspaces %
 \gdef\parseargdiscardspace {\futurelet\temp\parseargx}}

{\obeylines %
  \gdef\parseargline#1^^M{%
    \endgroup % End of the group started in \parsearg.
    %
    % First remove any @c comment, then any @comment.
    % Result of each macro is put in \toks0.
    \argremovec #1\c\relax %
    \expandafter\argremovecomment \the\toks0 \comment\relax %
    %
    % Call the caller's macro, saved as \next in \parsearg.
    \expandafter\next\expandafter{\the\toks0}%
  }%
}

% Since all \c{,omment} does is throw away the argument, we can let TeX
% do that for us.  The \relax here is matched by the \relax in the call
% in \parseargline; it could be more or less anything, its purpose is
% just to delimit the argument to the \c.
\def\argremovec#1\c#2\relax{\toks0 = {#1}}
\def\argremovecomment#1\comment#2\relax{\toks0 = {#1}}

% \argremovec{,omment} might leave us with trailing spaces, though; e.g.,
%    @end itemize  @c foo
% will have two active spaces as part of the argument with the
% `itemize'.  Here we remove all active spaces from #1, and assign the
% result to \toks0.
%
% This loses if there are any *other* active characters besides spaces
% in the argument -- _ ^ +, for example -- since they get expanded.
% Fortunately, Texinfo does not define any such commands.  (If it ever
% does, the catcode of the characters in questionwill have to be changed
% here.)  But this means we cannot call \removeactivespaces as part of
% \argremovec{,omment}, since @c uses \parsearg, and thus the argument
% that \parsearg gets might well have any character at all in it.
%
\def\removeactivespaces#1{%
  \begingroup
    \ignoreactivespaces
    \edef\temp{#1}%
    \global\toks0 = \expandafter{\temp}%
  \endgroup
}

% Change the active space to expand to nothing.
%
\begingroup
  \obeyspaces
  \gdef\ignoreactivespaces{\obeyspaces\let =\empty}
\endgroup


\def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}

%% These are used to keep @begin/@end levels from running away
%% Call \inENV within environments (after a \begingroup)
\newif\ifENV \ENVfalse \def\inENV{\ifENV\relax\else\ENVtrue\fi}
\def\ENVcheck{%
\ifENV\errmessage{Still within an environment.  Type Return to continue.}
\endgroup\fi} % This is not perfect, but it should reduce lossage

% @begin foo  is the same as @foo, for now.
\newhelp\EMsimple{Type <Return> to continue.}

\outer\def\begin{\parsearg\beginxxx}

\def\beginxxx #1{%
\expandafter\ifx\csname #1\endcsname\relax
{\errhelp=\EMsimple \errmessage{Undefined command @begin #1}}\else
\csname #1\endcsname\fi}

% @end foo executes the definition of \Efoo.
%
\def\end{\parsearg\endxxx}
\def\endxxx #1{%
  \removeactivespaces{#1}%
  \edef\endthing{\the\toks0}%
  %
  \expandafter\ifx\csname E\endthing\endcsname\relax
    \expandafter\ifx\csname \endthing\endcsname\relax
      % There's no \foo, i.e., no ``environment'' foo.
      \errhelp = \EMsimple
      \errmessage{Undefined command `@end \endthing'}%
    \else
      \unmatchedenderror\endthing
    \fi
  \else
    % Everything's ok; the right environment has been started.
    \csname E\endthing\endcsname
  \fi
}

% There is an environment #1, but it hasn't been started.  Give an error.
%
\def\unmatchedenderror#1{%
  \errhelp = \EMsimple
  \errmessage{This `@end #1' doesn't have a matching `@#1'}%
}

% Define the control sequence \E#1 to give an unmatched @end error.
%
\def\defineunmatchedend#1{%
  \expandafter\def\csname E#1\endcsname{\unmatchedenderror{#1}}%
}


% Single-spacing is done by various environments (specifically, in
% \nonfillstart and \quotations).
\newskip\singlespaceskip \singlespaceskip = \baselineskip
\def\singlespace{%
% Why was this kern here?  It messes up equalizing space above and below
% environments.  --karl, 6may93
%{\advance \baselineskip by -\singlespaceskip
%\kern \baselineskip}%
\baselineskip=\singlespaceskip
}

%% Simple single-character @ commands

% @@ prints an @
% Kludge this until the fonts are right (grr).
\def\@{{\tt \char '100}}

% This is turned off because it was never documented
% and you can use @w{...} around a quote to suppress ligatures.
%% Define @` and @' to be the same as ` and '
%% but suppressing ligatures.
%\def\`{{`}}
%\def\'{{'}}

% Used to generate quoted braces.

\def\mylbrace {{\tt \char '173}}
\def\myrbrace {{\tt \char '175}}
\let\{=\mylbrace
\let\}=\myrbrace

% @: forces normal size whitespace following.
\def\:{\spacefactor=1000 }

% @* forces a line break.
\def\*{\hfil\break\hbox{}\ignorespaces}

% @. is an end-of-sentence period.
\def\.{.\spacefactor=3000 }

% @w prevents a word break.  Without the \leavevmode, @w at the
% beginning of a paragraph, when TeX is still in vertical mode, would
% produce a whole line of output instead of starting the paragraph.
\def\w#1{\leavevmode\hbox{#1}}

% @group ... @end group forces ... to be all on one page, by enclosing
% it in a TeX vbox.  We use \vtop instead of \vbox to construct the box
% to keep its height that of a normal line.  According to the rules for
% \topskip (p.114 of the TeXbook), the glue inserted is
% max (\topskip - \ht (first item), 0).  If that height is large,
% therefore, no glue is inserted, and the space between the headline and
% the text is small, which looks bad.
%
\def\group{\begingroup
  \ifnum\catcode13=\active \else
    \errhelp = \groupinvalidhelp
    \errmessage{@group invalid in context where filling is enabled}%
  \fi
  %
  % The \vtop we start below produces a box with normal height and large
  % depth; thus, TeX puts \baselineskip glue before it, and (when the
  % next line of text is done) \lineskip glue after it.  (See p.82 of
  % the TeXbook.)  Thus, space below is not quite equal to space
  % above.  But it's pretty close.
  \def\Egroup{%
    \egroup           % End the \vtop.
    \endgroup         % End the \group.
  }%
  %
  \vtop\bgroup
    % We have to put a strut on the last line in case the @group is in
    % the midst of an example, rather than completely enclosing it.
    % Otherwise, the interline space between the last line of the group
    % and the first line afterwards is too small.  But we can't put the
    % strut in \Egroup, since there it would be on a line by itself.
    % Hence this just inserts a strut at the beginning of each line.
    \everypar = {\strut}%
    %
    % Since we have a strut on every line, we don't need any of TeX's
    % normal interline spacing.
    \offinterlineskip
    %
    % OK, but now we have to do something about blank
    % lines in the input in @example-like environments, which normally
    % just turn into \lisppar, which will insert no space now that we've
    % turned off the interline space.  Simplest is to make them be an
    % empty paragraph.
    \ifx\par\lisppar
      \edef\par{\leavevmode \par}%
      %
      % Reset ^^M's definition to new definition of \par.
      \obeylines
    \fi
    %
    % We do @comment here in case we are called inside an environment,
    % such as @example, where each end-of-line in the input causes an
    % end-of-line in the output.  We don't want the end-of-line after
    % the `@group' to put extra space in the output.  Since @group
    % should appear on a line by itself (according to the Texinfo
    % manual), we don't worry about eating any user text.
    \comment
}
%
% TeX puts in an \escapechar (i.e., `@') at the beginning of the help
% message, so this ends up printing `@group can only ...'.
%
\newhelp\groupinvalidhelp{%
group can only be used in environments such as @example,^^J%
where each line of input produces a line of output.}

% @need space-in-mils
% forces a page break if there is not space-in-mils remaining.

\newdimen\mil  \mil=0.001in

\def\need{\parsearg\needx}

% Old definition--didn't work.
%\def\needx #1{\par %
%% This method tries to make TeX break the page naturally
%% if the depth of the box does not fit.
%{\baselineskip=0pt%
%\vtop to #1\mil{\vfil}\kern -#1\mil\penalty 10000
%\prevdepth=-1000pt
%}}

\def\needx#1{%
  % Go into vertical mode, so we don't make a big box in the middle of a
  % paragraph.
  \par
  %
  % Don't add any leading before our big empty box, but allow a page
  % break, since the best break might be right here.
  \allowbreak
  \nointerlineskip
  \vtop to #1\mil{\vfil}%
  %
  % TeX does not even consider page breaks if a penalty added to the
  % main vertical list is 10000 or more.  But in order to see if the
  % empty box we just added fits on the page, we must make it consider
  % page breaks.  On the other hand, we don't want to actually break the
  % page after the empty box.  So we use a penalty of 9999.
  %
  % There is an extremely small chance that TeX will actually break the
  % page at this \penalty, if there are no other feasible breakpoints in
  % sight.  (If the user is using lots of big @group commands, which
  % almost-but-not-quite fill up a page, TeX will have a hard time doing
  % good page breaking, for example.)  However, I could not construct an
  % example where a page broke at this \penalty; if it happens in a real
  % document, then we can reconsider our strategy.
  \penalty9999
  %
  % Back up by the size of the box, whether we did a page break or not.
  \kern -#1\mil
  %
  % Do not allow a page break right after this kern.
  \nobreak
}

% @br   forces paragraph break

\let\br = \par

% @dots{}  output some dots

\def\dots{$\ldots$}

% @page    forces the start of a new page

\def\page{\par\vfill\supereject}

% @exdent text....
% outputs text on separate line in roman font, starting at standard page margin

% This records the amount of indent in the innermost environment.
% That's how much \exdent should take out.
\newskip\exdentamount

% This defn is used inside fill environments such as @defun.
\def\exdent{\parsearg\exdentyyy}
\def\exdentyyy #1{{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}}

% This defn is used inside nofill environments such as @example.
\def\nofillexdent{\parsearg\nofillexdentyyy}
\def\nofillexdentyyy #1{{\advance \leftskip by -\exdentamount
\leftline{\hskip\leftskip{\rm#1}}}}

%\hbox{{\rm#1}}\hfil\break}}

% @include file    insert text of that file as input.

\def\include{\parsearg\includezzz}
%Use \input\thisfile to avoid blank after \input, which may be an active
%char (in which case the blank would become the \input argument).
%The grouping keeps the value of \thisfile correct even when @include
%is nested.
\def\includezzz #1{\begingroup
\def\thisfile{#1}\input\thisfile
\endgroup}

\def\thisfile{}

% @center line   outputs that line, centered

\def\center{\parsearg\centerzzz}
\def\centerzzz #1{{\advance\hsize by -\leftskip
\advance\hsize by -\rightskip
\centerline{#1}}}

% @sp n   outputs n lines of vertical space

\def\sp{\parsearg\spxxx}
\def\spxxx #1{\par \vskip #1\baselineskip}

% @comment ...line which is ignored...
% @c is the same as @comment
% @ignore ... @end ignore  is another way to write a comment

\def\comment{\catcode 64=\other \catcode 123=\other \catcode 125=\other%
\parsearg \commentxxx}

\def\commentxxx #1{\catcode 64=0 \catcode 123=1 \catcode 125=2 }

\let\c=\comment

% Prevent errors for section commands.
% Used in @ignore and in failing conditionals.
\def\ignoresections{%
\let\chapter=\relax
\let\unnumbered=\relax
\let\top=\relax
\let\unnumberedsec=\relax
\let\unnumberedsection=\relax
\let\unnumberedsubsec=\relax
\let\unnumberedsubsection=\relax
\let\unnumberedsubsubsec=\relax
\let\unnumberedsubsubsection=\relax
\let\section=\relax
\let\subsec=\relax
\let\subsubsec=\relax
\let\subsection=\relax
\let\subsubsection=\relax
\let\appendix=\relax
\let\appendixsec=\relax
\let\appendixsection=\relax
\let\appendixsubsec=\relax
\let\appendixsubsection=\relax
\let\appendixsubsubsec=\relax
\let\appendixsubsubsection=\relax
\let\contents=\relax
\let\smallbook=\relax
\let\titlepage=\relax
}

% Used in nested conditionals, where we have to parse the Texinfo source
% and so want to turn off most commands, in case they are used
% incorrectly.
%
\def\ignoremorecommands{%
  \let\defcv = \relax
  \let\deffn = \relax
  \let\deffnx = \relax
  \let\defindex = \relax
  \let\defivar = \relax
  \let\defmac = \relax
  \let\defmethod = \relax
  \let\defop = \relax
  \let\defopt = \relax
  \let\defspec = \relax
  \let\deftp = \relax
  \let\deftypefn = \relax
  \let\deftypefun = \relax
  \let\deftypevar = \relax
  \let\deftypevr = \relax
  \let\defun = \relax
  \let\defvar = \relax
  \let\defvr = \relax
  \let\ref = \relax
  \let\xref = \relax
  \let\printindex = \relax
  \let\pxref = \relax
  \let\settitle = \relax
  \let\include = \relax
  \let\lowersections = \relax
  \let\down = \relax
  \let\raisesections = \relax
  \let\up = \relax
  \let\set = \relax
  \let\clear = \relax
}

% Ignore @ignore ... @end ignore.
%
\def\ignore{\doignore{ignore}}

% Also ignore @ifinfo, @menu, and @direntry text.
%
\def\ifinfo{\doignore{ifinfo}}
\def\menu{\doignore{menu}}
\def\direntry{\doignore{direntry}}

% Ignore text until a line `@end #1'.
%
\def\doignore#1{\begingroup
  % Don't complain about control sequences we have declared \outer.
  \ignoresections
  %
  % Define a command to swallow text until we reach `@end #1'.
  \long\def\doignoretext##1\end #1{\enddoignore}%
  %
  % Make sure that spaces turn into tokens that match what \doignoretext wants.
  \catcode32 = 10
  %
  % And now expand that command.
  \doignoretext
}

% What we do to finish off ignored text.
%
\def\enddoignore{\endgroup\ignorespaces}%

\newif\ifwarnedobs\warnedobsfalse
\def\obstexwarn{%
  \ifwarnedobs\relax\else
  % We need to warn folks that they may have trouble with TeX 3.0.
  % This uses \immediate\write16 rather than \message to get newlines.
    \immediate\write16{}
    \immediate\write16{***WARNING*** for users of Unix TeX 3.0!}
    \immediate\write16{This manual trips a bug in TeX version 3.0 (tex hangs).}
    \immediate\write16{If you are running another version of TeX, relax.}
    \immediate\write16{If you are running Unix TeX 3.0, kill this TeX process.}
    \immediate\write16{  Then upgrade your TeX installation if you can.}
    \immediate\write16{If you are stuck with version 3.0, run the}
    \immediate\write16{  script ``tex3patch'' from the Texinfo distribution}
    \immediate\write16{  to use a workaround.}
    \immediate\write16{}
    \warnedobstrue
    \fi
}

% **In TeX 3.0, setting text in \nullfont hangs tex.  For a
% workaround (which requires the file ``dummy.tfm'' to be installed),
% uncomment the following line:
%%%%%\font\nullfont=dummy\let\obstexwarn=\relax

% Ignore text, except that we keep track of conditional commands for
% purposes of nesting, up to an `@end #1' command.
%
\def\nestedignore#1{%
  \obstexwarn
  % We must actually expand the ignored text to look for the @end
  % command, so that nested ignore constructs work.  Thus, we put the
  % text into a \vbox and then do nothing with the result.  To minimize
  % the change of memory overflow, we follow the approach outlined on
  % page 401 of the TeXbook: make the current font be a dummy font.
  %
  \setbox0 = \vbox\bgroup
    % Don't complain about control sequences we have declared \outer.
    \ignoresections
    %
    % Define `@end #1' to end the box, which will in turn undefine the
    % @end command again.
    \expandafter\def\csname E#1\endcsname{\egroup\ignorespaces}%
    %
    % We are going to be parsing Texinfo commands.  Most cause no
    % trouble when they are used incorrectly, but some commands do
    % complicated argument parsing or otherwise get confused, so we
    % undefine them.
    %
    % We can't do anything about stray @-signs, unfortunately;
    % they'll produce `undefined control sequence' errors.
    \ignoremorecommands
    %
    % Set the current font to be \nullfont, a TeX primitive, and define
    % all the font commands to also use \nullfont.  We don't use
    % dummy.tfm, as suggested in the TeXbook, because not all sites
    % might have that installed.  Therefore, math mode will still
    % produce output, but that should be an extremely small amount of
    % stuff compared to the main input.
    %
    \nullfont
    \let\tenrm = \nullfont  \let\tenit = \nullfont  \let\tensl = \nullfont
    \let\tenbf = \nullfont  \let\tentt = \nullfont  \let\smallcaps = \nullfont
    \let\tensf = \nullfont
    % Similarly for index fonts (mostly for their use in
    % smallexample)
    \let\indrm = \nullfont  \let\indit = \nullfont  \let\indsl = \nullfont
    \let\indbf = \nullfont  \let\indtt = \nullfont  \let\indsc = \nullfont
    \let\indsf = \nullfont
    %
    % Don't complain when characters are missing from the fonts.
    \tracinglostchars = 0
    %
    % Don't bother to do space factor calculations.
    \frenchspacing
    %
    % Don't report underfull hboxes.
    \hbadness = 10000
    %
    % Do minimal line-breaking.
    \pretolerance = 10000
    %
    % Do not execute instructions in @tex
    \def\tex{\doignore{tex}}
}

% @set VAR sets the variable VAR to an empty value.
% @set VAR REST-OF-LINE sets VAR to the value REST-OF-LINE.
%
% Since we want to separate VAR from REST-OF-LINE (which might be
% empty), we can't just use \parsearg; we have to insert a space of our
% own to delimit the rest of the line, and then take it out again if we
% didn't need it.
%
\def\set{\parsearg\setxxx}
\def\setxxx#1{\setyyy#1 \endsetyyy}
\def\setyyy#1 #2\endsetyyy{%
  \def\temp{#2}%
  \ifx\temp\empty \global\expandafter\let\csname SET#1\endcsname = \empty
  \else \setzzz{#1}#2\endsetzzz % Remove the trailing space \setxxx inserted.
  \fi
}
\def\setzzz#1#2 \endsetzzz{\expandafter\xdef\csname SET#1\endcsname{#2}}

% @clear VAR clears (i.e., unsets) the variable VAR.
%
\def\clear{\parsearg\clearxxx}
\def\clearxxx#1{\global\expandafter\let\csname SET#1\endcsname=\relax}

% @value{foo} gets the text saved in variable foo.
%
\def\value#1{\expandafter
		\ifx\csname SET#1\endcsname\relax
			{\{No value for ``#1''\}}
		\else \csname SET#1\endcsname \fi}

% @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
% with @set.
%
\def\ifset{\parsearg\ifsetxxx}
\def\ifsetxxx #1{%
  \expandafter\ifx\csname SET#1\endcsname\relax
    \expandafter\ifsetfail
  \else
    \expandafter\ifsetsucceed
  \fi
}
\def\ifsetsucceed{\conditionalsucceed{ifset}}
\def\ifsetfail{\nestedignore{ifset}}
\defineunmatchedend{ifset}

% @ifclear VAR ... @end ifclear reads the `...' iff VAR has never been
% defined with @set, or has been undefined with @clear.
%
\def\ifclear{\parsearg\ifclearxxx}
\def\ifclearxxx #1{%
  \expandafter\ifx\csname SET#1\endcsname\relax
    \expandafter\ifclearsucceed
  \else
    \expandafter\ifclearfail
  \fi
}
\def\ifclearsucceed{\conditionalsucceed{ifclear}}
\def\ifclearfail{\nestedignore{ifclear}}
\defineunmatchedend{ifclear}

% @iftex always succeeds; we read the text following, through @end
% iftex).  But `@end iftex' should be valid only after an @iftex.
%
\def\iftex{\conditionalsucceed{iftex}}
\defineunmatchedend{iftex}

% We can't just want to start a group at @iftex (for example) and end it
% at @end iftex, since then @set commands inside the conditional have no
% effect (they'd get reverted at the end of the group).  So we must
% define \Eiftex to redefine itself to be its previous value.  (We can't
% just define it to fail again with an ``unmatched end'' error, since
% the @ifset might be nested.)
%
\def\conditionalsucceed#1{%
  \edef\temp{%
    % Remember the current value of \E#1.
    \let\nece{prevE#1} = \nece{E#1}%
    %
    % At the `@end #1', redefine \E#1 to be its previous value.
    \def\nece{E#1}{\let\nece{E#1} = \nece{prevE#1}}%
  }%
  \temp
}

% We need to expand lots of \csname's, but we don't want to expand the
% control sequences after we've constructed them.
%
\def\nece#1{\expandafter\noexpand\csname#1\endcsname}

% @asis just yields its argument.  Used with @table, for example.
%
\def\asis#1{#1}

% @math means output in math mode.
% We don't use $'s directly in the definition of \math because control
% sequences like \math are expanded when the toc file is written.  Then,
% we read the toc file back, the $'s will be normal characters (as they
% should be, according to the definition of Texinfo).  So we must use a
% control sequence to switch into and out of math mode.
%
% This isn't quite enough for @math to work properly in indices, but it
% seems unlikely it will ever be needed there.
%
\let\implicitmath = $
\def\math#1{\implicitmath #1\implicitmath}

% @bullet and @minus need the same treatment as @math, just above.
\def\bullet{\implicitmath\ptexbullet\implicitmath}
\def\minus{\implicitmath-\implicitmath}

\def\node{\ENVcheck\parsearg\nodezzz}
\def\nodezzz#1{\nodexxx [#1,]}
\def\nodexxx[#1,#2]{\gdef\lastnode{#1}}
\let\nwnode=\node
\let\lastnode=\relax

\def\donoderef{\ifx\lastnode\relax\else
\expandafter\expandafter\expandafter\setref{\lastnode}\fi
\let\lastnode=\relax}

\def\unnumbnoderef{\ifx\lastnode\relax\else
\expandafter\expandafter\expandafter\unnumbsetref{\lastnode}\fi
\let\lastnode=\relax}

\def\appendixnoderef{\ifx\lastnode\relax\else
\expandafter\expandafter\expandafter\appendixsetref{\lastnode}\fi
\let\lastnode=\relax}

\let\refill=\relax

% @setfilename is done at the beginning of every texinfo file.
% So open here the files we need to have open while reading the input.
% This makes it possible to make a .fmt file for texinfo.
\def\setfilename{%
   \readauxfile
   \opencontents
   \openindices
   \fixbackslash  % Turn off hack to swallow `\input texinfo'.
   \global\let\setfilename=\comment % Ignore extra @setfilename cmds.
   \comment % Ignore the actual filename.
}

\outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}

\def\inforef #1{\inforefzzz #1,,,,**}
\def\inforefzzz #1,#2,#3,#4**{See Info file \file{\ignorespaces #3{}},
  node \samp{\ignorespaces#1{}}}

\message{fonts,}

% Font-change commands.

% Texinfo supports the sans serif font style, which plain TeX does not.
% So we set up a \sf analogous to plain's \rm, etc.
\newfam\sffam
\def\sf{\fam=\sffam \tensf}
\let\li = \sf % Sometimes we call it \li, not \sf.

%% Try out Computer Modern fonts at \magstephalf
\let\mainmagstep=\magstephalf

\ifx\bigger\relax
\let\mainmagstep=\magstep1
\font\textrm=cmr12
\font\texttt=cmtt12
\else
\font\textrm=cmr10 scaled \mainmagstep
\font\texttt=cmtt10 scaled \mainmagstep
\fi
% Instead of cmb10, you many want to use cmbx10.
% cmbx10 is a prettier font on its own, but cmb10
% looks better when embedded in a line with cmr10.
\font\textbf=cmb10 scaled \mainmagstep
\font\textit=cmti10 scaled \mainmagstep
\font\textsl=cmsl10 scaled \mainmagstep
\font\textsf=cmss10 scaled \mainmagstep
\font\textsc=cmcsc10 scaled \mainmagstep
\font\texti=cmmi10 scaled \mainmagstep
\font\textsy=cmsy10 scaled \mainmagstep

% A few fonts for @defun, etc.
\font\defbf=cmbx10 scaled \magstep1 %was 1314
\font\deftt=cmtt10 scaled \magstep1
\def\df{\let\tentt=\deftt \let\tenbf = \defbf \bf}

% Fonts for indices and small examples.
% We actually use the slanted font rather than the italic,
% because texinfo normally uses the slanted fonts for that.
% Do not make many font distinctions in general in the index, since they
% aren't very useful.
\font\ninett=cmtt9
\font\indrm=cmr9
\font\indit=cmsl9
\let\indsl=\indit
\let\indtt=\ninett
\let\indsf=\indrm
\let\indbf=\indrm
\let\indsc=\indrm
\font\indi=cmmi9
\font\indsy=cmsy9

% Fonts for headings
\font\chaprm=cmbx12 scaled \magstep2
\font\chapit=cmti12 scaled \magstep2
\font\chapsl=cmsl12 scaled \magstep2
\font\chaptt=cmtt12 scaled \magstep2
\font\chapsf=cmss12 scaled \magstep2
\let\chapbf=\chaprm
\font\chapsc=cmcsc10 scaled\magstep3
\font\chapi=cmmi12 scaled \magstep2
\font\chapsy=cmsy10 scaled \magstep3

\font\secrm=cmbx12 scaled \magstep1
\font\secit=cmti12 scaled \magstep1
\font\secsl=cmsl12 scaled \magstep1
\font\sectt=cmtt12 scaled \magstep1
\font\secsf=cmss12 scaled \magstep1
\font\secbf=cmbx12 scaled \magstep1
\font\secsc=cmcsc10 scaled\magstep2
\font\seci=cmmi12 scaled \magstep1
\font\secsy=cmsy10 scaled \magstep2

% \font\ssecrm=cmbx10 scaled \magstep1    % This size an font looked bad.
% \font\ssecit=cmti10 scaled \magstep1    % The letters were too crowded.
% \font\ssecsl=cmsl10 scaled \magstep1
% \font\ssectt=cmtt10 scaled \magstep1
% \font\ssecsf=cmss10 scaled \magstep1

%\font\ssecrm=cmb10 scaled 1315	% Note the use of cmb rather than cmbx.
%\font\ssecit=cmti10 scaled 1315	% Also, the size is a little larger than
%\font\ssecsl=cmsl10 scaled 1315	% being scaled magstep1.
%\font\ssectt=cmtt10 scaled 1315
%\font\ssecsf=cmss10 scaled 1315

%\let\ssecbf=\ssecrm

\font\ssecrm=cmbx12 scaled \magstephalf
\font\ssecit=cmti12 scaled \magstephalf
\font\ssecsl=cmsl12 scaled \magstephalf
\font\ssectt=cmtt12 scaled \magstephalf
\font\ssecsf=cmss12 scaled \magstephalf
\font\ssecbf=cmbx12 scaled \magstephalf
\font\ssecsc=cmcsc10 scaled \magstep1
\font\sseci=cmmi12 scaled \magstephalf
\font\ssecsy=cmsy10 scaled \magstep1
% The smallcaps and symbol fonts should actually be scaled \magstep1.5,
% but that is not a standard magnification.

% Fonts for title page:
\font\titlerm = cmbx12 scaled \magstep3
\let\authorrm = \secrm

% In order for the font changes to affect most math symbols and letters,
% we have to define the \textfont of the standard families.  Since
% texinfo doesn't allow for producing subscripts and superscripts, we
% don't bother to reset \scriptfont and \scriptscriptfont (which would
% also require loading a lot more fonts).
%
\def\resetmathfonts{%
  \textfont0 = \tenrm \textfont1 = \teni \textfont2 = \tensy
  \textfont\itfam = \tenit \textfont\slfam = \tensl \textfont\bffam = \tenbf
  \textfont\ttfam = \tentt \textfont\sffam = \tensf
}


% The font-changing commands redefine the meanings of \tenSTYLE, instead
% of just \STYLE.  We do this so that font changes will continue to work
% in math mode, where it is the current \fam that is relevant in most
% cases, not the current.  Plain TeX does, for example,
% \def\bf{\fam=\bffam \tenbf}  By redefining \tenbf, we obviate the need
% to redefine \bf itself.
\def\textfonts{%
  \let\tenrm=\textrm \let\tenit=\textit \let\tensl=\textsl
  \let\tenbf=\textbf \let\tentt=\texttt \let\smallcaps=\textsc
  \let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy
  \resetmathfonts}
\def\chapfonts{%
  \let\tenrm=\chaprm \let\tenit=\chapit \let\tensl=\chapsl
  \let\tenbf=\chapbf \let\tentt=\chaptt \let\smallcaps=\chapsc
  \let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy
  \resetmathfonts}
\def\secfonts{%
  \let\tenrm=\secrm \let\tenit=\secit \let\tensl=\secsl
  \let\tenbf=\secbf \let\tentt=\sectt \let\smallcaps=\secsc
  \let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy
  \resetmathfonts}
\def\subsecfonts{%
  \let\tenrm=\ssecrm \let\tenit=\ssecit \let\tensl=\ssecsl
  \let\tenbf=\ssecbf \let\tentt=\ssectt \let\smallcaps=\ssecsc
  \let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy
  \resetmathfonts}
\def\indexfonts{%
  \let\tenrm=\indrm \let\tenit=\indit \let\tensl=\indsl
  \let\tenbf=\indbf \let\tentt=\indtt \let\smallcaps=\indsc
  \let\tensf=\indsf \let\teni=\indi \let\tensy=\indsy
  \resetmathfonts}

% Set up the default fonts, so we can use them for creating boxes.
%
\textfonts

% Count depth in font-changes, for error checks
\newcount\fontdepth \fontdepth=0

% Fonts for short table of contents.
\font\shortcontrm=cmr12
\font\shortcontbf=cmbx12
\font\shortcontsl=cmsl12

%% Add scribe-like font environments, plus @l for inline lisp (usually sans
%% serif) and @ii for TeX italic

% \smartitalic{ARG} outputs arg in italics, followed by an italic correction
% unless the following character is such as not to need one.
\def\smartitalicx{\ifx\next,\else\ifx\next-\else\ifx\next.\else\/\fi\fi\fi}
\def\smartitalic#1{{\sl #1}\futurelet\next\smartitalicx}

\let\i=\smartitalic
\let\var=\smartitalic
\let\dfn=\smartitalic
\let\emph=\smartitalic
\let\cite=\smartitalic

\def\b#1{{\bf #1}}
\let\strong=\b

% We can't just use \exhyphenpenalty, because that only has effect at
% the end of a paragraph.  Restore normal hyphenation at the end of the
% group within which \nohyphenation is presumably called.
%
\def\nohyphenation{\hyphenchar\font = -1  \aftergroup\restorehyphenation}
\def\restorehyphenation{\hyphenchar\font = `- }

\def\t#1{%
  {\tt \nohyphenation \rawbackslash \frenchspacing #1}%
  \null
}
\let\ttfont = \t
%\def\samp #1{`{\tt \rawbackslash \frenchspacing #1}'\null}
\def\samp #1{`\tclose{#1}'\null}
\def\key #1{{\tt \nohyphenation \uppercase{#1}}\null}
\def\ctrl #1{{\tt \rawbackslash \hat}#1}

\let\file=\samp

% @code is a modification of @t,
% which makes spaces the same size as normal in the surrounding text.
\def\tclose#1{%
  {%
    % Change normal interword space to be same as for the current font.
    \spaceskip = \fontdimen2\font
    %
    % Switch to typewriter.
    \tt
    %
    % But `\ ' produces the large typewriter interword space.
    \def\ {{\spaceskip = 0pt{} }}%
    %
    % Turn off hyphenation.
    \nohyphenation
    %
    \rawbackslash
    \frenchspacing
    #1%
  }%
  \null
}

% We *must* turn on hyphenation at `-' and `_' in \code.
% Otherwise, it is too hard to avoid overful hboxes
% in the Emacs manual, the Library manual, etc.

% Unfortunately, TeX uses one parameter (\hyphenchar) to control
% both hyphenation at - and hyphenation within words.
% We must therefore turn them both off (\tclose does that)
% and arrange explicitly to hyphenate an a dash.
%  -- rms.
{
\catcode `\-=\active
\catcode `\_=\active
\global\def\code{\begingroup \catcode `\-=\active \let-\codedash \let_\codeunder \codex}
}
\def\codedash{-\discretionary{}{}{}}
\def\codeunder{\normalunderscore\discretionary{}{}{}}
\def\codex #1{\tclose{#1}\endgroup}

%\let\exp=\tclose  %Was temporary

% @kbd is like @code, except that if the argument is just one @key command,
% then @kbd has no effect.

\def\xkey{\key}
\def\kbdfoo#1#2#3\par{\def\one{#1}\def\three{#3}\def\threex{??}%
\ifx\one\xkey\ifx\threex\three \key{#2}%
\else\tclose{\look}\fi
\else\tclose{\look}\fi}

% Typeset a dimension, e.g., `in' or `pt'.  The only reason for the
% argument is to make the input look right: @dmn{pt} instead of
% @dmn{}pt.
%
\def\dmn#1{\thinspace #1}

\def\kbd#1{\def\look{#1}\expandafter\kbdfoo\look??\par}

\def\l#1{{\li #1}\null}		%

\def\r#1{{\rm #1}}		% roman font
% Use of \lowercase was suggested.
\def\sc#1{{\smallcaps#1}}	% smallcaps font
\def\ii#1{{\it #1}}		% italic font

\message{page headings,}

\newskip\titlepagetopglue \titlepagetopglue = 1.5in
\newskip\titlepagebottomglue \titlepagebottomglue = 2pc

% First the title page.  Must do @settitle before @titlepage.
\def\titlefont#1{{\titlerm #1}}

\newif\ifseenauthor
\newif\iffinishedtitlepage

\def\shorttitlepage{\parsearg\shorttitlepagezzz}
\def\shorttitlepagezzz #1{\begingroup\hbox{}\vskip 1.5in \chaprm \centerline{#1}%
	\endgroup\page\hbox{}\page}

\def\titlepage{\begingroup \parindent=0pt \textfonts
   \let\subtitlerm=\tenrm
% I deinstalled the following change because \cmr12 is undefined.
% This change was not in the ChangeLog anyway.  --rms.
%   \let\subtitlerm=\cmr12
   \def\subtitlefont{\subtitlerm \normalbaselineskip = 13pt \normalbaselines}%
   %
   \def\authorfont{\authorrm \normalbaselineskip = 16pt \normalbaselines}%
   %
   % Leave some space at the very top of the page.
   \vglue\titlepagetopglue
   %
   % Now you can print the title using @title.
   \def\title{\parsearg\titlezzz}%
   \def\titlezzz##1{\leftline{\titlefont{##1}}
		    % print a rule at the page bottom also.
		    \finishedtitlepagefalse
		    \vskip4pt \hrule height 4pt width \hsize \vskip4pt}%
   % No rule at page bottom unless we print one at the top with @title.
   \finishedtitlepagetrue
   %
   % Now you can put text using @subtitle.
   \def\subtitle{\parsearg\subtitlezzz}%
   \def\subtitlezzz##1{{\subtitlefont \rightline{##1}}}%
   %
   % @author should come last, but may come many times.
   \def\author{\parsearg\authorzzz}%
   \def\authorzzz##1{\ifseenauthor\else\vskip 0pt plus 1filll\seenauthortrue\fi
      {\authorfont \leftline{##1}}}%
   %
   % Most title ``pages'' are actually two pages long, with space
   % at the top of the second.  We don't want the ragged left on the second.
   \let\oldpage = \page
   \def\page{%
      \iffinishedtitlepage\else
	 \finishtitlepage
      \fi
      \oldpage
      \let\page = \oldpage
      \hbox{}}%
%   \def\page{\oldpage \hbox{}}
}

\def\Etitlepage{%
   \iffinishedtitlepage\else
      \finishtitlepage
   \fi
   % It is important to do the page break before ending the group,
   % because the headline and footline are only empty inside the group.
   % If we use the new definition of \page, we always get a blank page
   % after the title page, which we certainly don't want.
   \oldpage
   \endgroup
   \HEADINGSon
}

\def\finishtitlepage{%
   \vskip4pt \hrule height 2pt width \hsize
   \vskip\titlepagebottomglue
   \finishedtitlepagetrue
}

%%% Set up page headings and footings.

\let\thispage=\folio

\newtoks \evenheadline    % Token sequence for heading line of even pages
\newtoks \oddheadline     % Token sequence for heading line of odd pages
\newtoks \evenfootline    % Token sequence for footing line of even pages
\newtoks \oddfootline     % Token sequence for footing line of odd pages

% Now make Tex use those variables
\headline={{\textfonts\rm \ifodd\pageno \the\oddheadline
                            \else \the\evenheadline \fi}}
\footline={{\textfonts\rm \ifodd\pageno \the\oddfootline
                            \else \the\evenfootline \fi}\HEADINGShook}
\let\HEADINGShook=\relax

% Commands to set those variables.
% For example, this is what  @headings on  does
% @evenheading @thistitle|@thispage|@thischapter
% @oddheading @thischapter|@thispage|@thistitle
% @evenfooting @thisfile||
% @oddfooting ||@thisfile

\def\evenheading{\parsearg\evenheadingxxx}
\def\oddheading{\parsearg\oddheadingxxx}
\def\everyheading{\parsearg\everyheadingxxx}

\def\evenfooting{\parsearg\evenfootingxxx}
\def\oddfooting{\parsearg\oddfootingxxx}
\def\everyfooting{\parsearg\everyfootingxxx}

{\catcode`\@=0 %

\gdef\evenheadingxxx #1{\evenheadingyyy #1@|@|@|@|\finish}
\gdef\evenheadingyyy #1@|#2@|#3@|#4\finish{%
\global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

\gdef\oddheadingxxx #1{\oddheadingyyy #1@|@|@|@|\finish}
\gdef\oddheadingyyy #1@|#2@|#3@|#4\finish{%
\global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

\gdef\everyheadingxxx #1{\everyheadingyyy #1@|@|@|@|\finish}
\gdef\everyheadingyyy #1@|#2@|#3@|#4\finish{%
\global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}
\global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

\gdef\evenfootingxxx #1{\evenfootingyyy #1@|@|@|@|\finish}
\gdef\evenfootingyyy #1@|#2@|#3@|#4\finish{%
\global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

\gdef\oddfootingxxx #1{\oddfootingyyy #1@|@|@|@|\finish}
\gdef\oddfootingyyy #1@|#2@|#3@|#4\finish{%
\global\oddfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}

\gdef\everyfootingxxx #1{\everyfootingyyy #1@|@|@|@|\finish}
\gdef\everyfootingyyy #1@|#2@|#3@|#4\finish{%
\global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}
\global\oddfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
%
}% unbind the catcode of @.

% @headings double	turns headings on for double-sided printing.
% @headings single	turns headings on for single-sided printing.
% @headings off		turns them off.
% @headings on		same as @headings double, retained for compatibility.
% @headings after	turns on double-sided headings after this page.
% @headings doubleafter	turns on double-sided headings after this page.
% @headings singleafter turns on single-sided headings after this page.
% By default, they are off.

\def\headings #1 {\csname HEADINGS#1\endcsname}

\def\HEADINGSoff{
\global\evenheadline={\hfil} \global\evenfootline={\hfil}
\global\oddheadline={\hfil} \global\oddfootline={\hfil}}
\HEADINGSoff
% When we turn headings on, set the page number to 1.
% For double-sided printing, put current file name in lower left corner,
% chapter name on inside top of right hand pages, document
% title on inside top of left hand pages, and page numbers on outside top
% edge of all pages.
\def\HEADINGSdouble{
%\pagealignmacro
\global\pageno=1
\global\evenfootline={\hfil}
\global\oddfootline={\hfil}
\global\evenheadline={\line{\folio\hfil\thistitle}}
\global\oddheadline={\line{\thischapter\hfil\folio}}
}
% For single-sided printing, chapter title goes across top left of page,
% page number on top right.
\def\HEADINGSsingle{
%\pagealignmacro
\global\pageno=1
\global\evenfootline={\hfil}
\global\oddfootline={\hfil}
\global\evenheadline={\line{\thischapter\hfil\folio}}
\global\oddheadline={\line{\thischapter\hfil\folio}}
}
\def\HEADINGSon{\HEADINGSdouble}

\def\HEADINGSafter{\let\HEADINGShook=\HEADINGSdoublex}
\let\HEADINGSdoubleafter=\HEADINGSafter
\def\HEADINGSdoublex{%
\global\evenfootline={\hfil}
\global\oddfootline={\hfil}
\global\evenheadline={\line{\folio\hfil\thistitle}}
\global\oddheadline={\line{\thischapter\hfil\folio}}
}

\def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
\def\HEADINGSsinglex{%
\global\evenfootline={\hfil}
\global\oddfootline={\hfil}
\global\evenheadline={\line{\thischapter\hfil\folio}}
\global\oddheadline={\line{\thischapter\hfil\folio}}
}

% Subroutines used in generating headings
% Produces Day Month Year style of output.
\def\today{\number\day\space
\ifcase\month\or
January\or February\or March\or April\or May\or June\or
July\or August\or September\or October\or November\or December\fi
\space\number\year}

% Use this if you want the Month Day, Year style of output.
%\def\today{\ifcase\month\or
%January\or February\or March\or April\or May\or June\or
%July\or August\or September\or October\or November\or December\fi
%\space\number\day, \number\year}

% @settitle line...  specifies the title of the document, for headings
% It generates no output of its own

\def\thistitle{No Title}
\def\settitle{\parsearg\settitlezzz}
\def\settitlezzz #1{\gdef\thistitle{#1}}

\message{tables,}

% @tabs -- simple alignment

% These don't work.  For one thing, \+ is defined as outer.
% So these macros cannot even be defined.

%\def\tabs{\parsearg\tabszzz}
%\def\tabszzz #1{\settabs\+#1\cr}
%\def\tabline{\parsearg\tablinezzz}
%\def\tablinezzz #1{\+#1\cr}
%\def\&{&}

% Tables -- @table, @ftable, @vtable, @item(x), @kitem(x), @xitem(x).

% default indentation of table text
\newdimen\tableindent \tableindent=.8in
% default indentation of @itemize and @enumerate text
\newdimen\itemindent  \itemindent=.3in
% margin between end of table item and start of table text.
\newdimen\itemmargin  \itemmargin=.1in

% used internally for \itemindent minus \itemmargin
\newdimen\itemmax

% Note @table, @vtable, and @vtable define @item, @itemx, etc., with
% these defs.
% They also define \itemindex
% to index the item name in whatever manner is desired (perhaps none).

\newif\ifitemxneedsnegativevskip

\def\itemxpar{\par\ifitemxneedsnegativevskip\vskip-\parskip\nobreak\fi}

\def\internalBitem{\smallbreak \parsearg\itemzzz}
\def\internalBitemx{\itemxpar \parsearg\itemzzz}

\def\internalBxitem "#1"{\def\xitemsubtopix{#1} \smallbreak \parsearg\xitemzzz}
\def\internalBxitemx "#1"{\def\xitemsubtopix{#1} \itemxpar \parsearg\xitemzzz}

\def\internalBkitem{\smallbreak \parsearg\kitemzzz}
\def\internalBkitemx{\itemxpar \parsearg\kitemzzz}

\def\kitemzzz #1{\dosubind {kw}{\code{#1}}{for {\bf \lastfunction}}%
                 \itemzzz {#1}}

\def\xitemzzz #1{\dosubind {kw}{\code{#1}}{for {\bf \xitemsubtopic}}%
                 \itemzzz {#1}}

\def\itemzzz #1{\begingroup %
  \advance\hsize by -\rightskip
  \advance\hsize by -\tableindent
  \setbox0=\hbox{\itemfont{#1}}%
  \itemindex{#1}%
  \nobreak % This prevents a break before @itemx.
  %
  % Be sure we are not still in the middle of a paragraph.
  %{\parskip = 0in
  %\par
  %}%
  %
  % If the item text does not fit in the space we have, put it on a line
  % by itself, and do not allow a page break either before or after that
  % line.  We do not start a paragraph here because then if the next
  % command is, e.g., @kindex, the whatsit would get put into the
  % horizontal list on a line by itself, resulting in extra blank space.
  \ifdim \wd0>\itemmax
    %
    % Make this a paragraph so we get the \parskip glue and wrapping,
    % but leave it ragged-right.
    \begingroup
      \advance\leftskip by-\tableindent
      \advance\hsize by\tableindent
      \advance\rightskip by0pt plus1fil
      \leavevmode\unhbox0\par
    \endgroup
    %
    % We're going to be starting a paragraph, but we don't want the
    % \parskip glue -- logically it's part of the @item we just started.
    \nobreak \vskip-\parskip
    %
    % Stop a page break at the \parskip glue coming up.  Unfortunately
    % we can't prevent a possible page break at the following
    % \baselineskip glue.
    \nobreak
    \endgroup
    \itemxneedsnegativevskipfalse
  \else
    % The item text fits into the space.  Start a paragraph, so that the
    % following text (if any) will end up on the same line.  Since that
    % text will be indented by \tableindent, we make the item text be in
    % a zero-width box.
    \noindent
    \rlap{\hskip -\tableindent\box0}\ignorespaces%
    \endgroup%
    \itemxneedsnegativevskiptrue%
  \fi
}

\def\item{\errmessage{@item while not in a table}}
\def\itemx{\errmessage{@itemx while not in a table}}
\def\kitem{\errmessage{@kitem while not in a table}}
\def\kitemx{\errmessage{@kitemx while not in a table}}
\def\xitem{\errmessage{@xitem while not in a table}}
\def\xitemx{\errmessage{@xitemx while not in a table}}

%% Contains a kludge to get @end[description] to work
\def\description{\tablez{\dontindex}{1}{}{}{}{}}

\def\table{\begingroup\inENV\obeylines\obeyspaces\tablex}
{\obeylines\obeyspaces%
\gdef\tablex #1^^M{%
\tabley\dontindex#1        \endtabley}}

\def\ftable{\begingroup\inENV\obeylines\obeyspaces\ftablex}
{\obeylines\obeyspaces%
\gdef\ftablex #1^^M{%
\tabley\fnitemindex#1        \endtabley
\def\Eftable{\endgraf\afterenvbreak\endgroup}%
\let\Etable=\relax}}

\def\vtable{\begingroup\inENV\obeylines\obeyspaces\vtablex}
{\obeylines\obeyspaces%
\gdef\vtablex #1^^M{%
\tabley\vritemindex#1        \endtabley
\def\Evtable{\endgraf\afterenvbreak\endgroup}%
\let\Etable=\relax}}

\def\dontindex #1{}
\def\fnitemindex #1{\doind {fn}{\code{#1}}}%
\def\vritemindex #1{\doind {vr}{\code{#1}}}%

{\obeyspaces %
\gdef\tabley#1#2 #3 #4 #5 #6 #7\endtabley{\endgroup%
\tablez{#1}{#2}{#3}{#4}{#5}{#6}}}

\def\tablez #1#2#3#4#5#6{%
\aboveenvbreak %
\begingroup %
\def\Edescription{\Etable}% Neccessary kludge.
\let\itemindex=#1%
\ifnum 0#3>0 \advance \leftskip by #3\mil \fi %
\ifnum 0#4>0 \tableindent=#4\mil \fi %
\ifnum 0#5>0 \advance \rightskip by #5\mil \fi %
\def\itemfont{#2}%
\itemmax=\tableindent %
\advance \itemmax by -\itemmargin %
\advance \leftskip by \tableindent %
\exdentamount=\tableindent
\parindent = 0pt
\parskip = \smallskipamount
\ifdim \parskip=0pt \parskip=2pt \fi%
\def\Etable{\endgraf\afterenvbreak\endgroup}%
\let\item = \internalBitem %
\let\itemx = \internalBitemx %
\let\kitem = \internalBkitem %
\let\kitemx = \internalBkitemx %
\let\xitem = \internalBxitem %
\let\xitemx = \internalBxitemx %
}

% This is the counter used by @enumerate, which is really @itemize

\newcount \itemno

\def\itemize{\parsearg\itemizezzz}

\def\itemizezzz #1{%
  \begingroup % ended by the @end itemsize
  \itemizey {#1}{\Eitemize}
}

\def\itemizey #1#2{%
\aboveenvbreak %
\itemmax=\itemindent %
\advance \itemmax by -\itemmargin %
\advance \leftskip by \itemindent %
\exdentamount=\itemindent
\parindent = 0pt %
\parskip = \smallskipamount %
\ifdim \parskip=0pt \parskip=2pt \fi%
\def#2{\endgraf\afterenvbreak\endgroup}%
\def\itemcontents{#1}%
\let\item=\itemizeitem}

% Set sfcode to normal for the chars that usually have another value.
% These are `.?!:;,'
\def\frenchspacing{\sfcode46=1000 \sfcode63=1000 \sfcode33=1000
  \sfcode58=1000 \sfcode59=1000 \sfcode44=1000 }

% \splitoff TOKENS\endmark defines \first to be the first token in
% TOKENS, and \rest to be the remainder.
%
\def\splitoff#1#2\endmark{\def\first{#1}\def\rest{#2}}%

% Allow an optional argument of an uppercase letter, lowercase letter,
% or number, to specify the first label in the enumerated list.  No
% argument is the same as `1'.
%
\def\enumerate{\parsearg\enumeratezzz}
\def\enumeratezzz #1{\enumeratey #1  \endenumeratey}
\def\enumeratey #1 #2\endenumeratey{%
  \begingroup % ended by the @end enumerate
  %
  % If we were given no argument, pretend we were given `1'.
  \def\thearg{#1}%
  \ifx\thearg\empty \def\thearg{1}\fi
  %
  % Detect if the argument is a single token.  If so, it might be a
  % letter.  Otherwise, the only valid thing it can be is a number.
  % (We will always have one token, because of the test we just made.
  % This is a good thing, since \splitoff doesn't work given nothing at
  % all -- the first parameter is undelimited.)
  \expandafter\splitoff\thearg\endmark
  \ifx\rest\empty
    % Only one token in the argument.  It could still be anything.
    % A ``lowercase letter'' is one whose \lccode is nonzero.
    % An ``uppercase letter'' is one whose \lccode is both nonzero, and
    %   not equal to itself.
    % Otherwise, we assume it's a number.
    %
    % We need the \relax at the end of the \ifnum lines to stop TeX from
    % continuing to look for a <number>.
    %
    \ifnum\lccode\expandafter`\thearg=0\relax
      \numericenumerate % a number (we hope)
    \else
      % It's a letter.
      \ifnum\lccode\expandafter`\thearg=\expandafter`\thearg\relax
        \lowercaseenumerate % lowercase letter
      \else
        \uppercaseenumerate % uppercase letter
      \fi
    \fi
  \else
    % Multiple tokens in the argument.  We hope it's a number.
    \numericenumerate
  \fi
}

% An @enumerate whose labels are integers.  The starting integer is
% given in \thearg.
%
\def\numericenumerate{%
  \itemno = \thearg
  \startenumeration{\the\itemno}%
}

% The starting (lowercase) letter is in \thearg.
\def\lowercaseenumerate{%
  \itemno = \expandafter`\thearg
  \startenumeration{%
    % Be sure we're not beyond the end of the alphabet.
    \ifnum\itemno=0
      \errmessage{No more lowercase letters in @enumerate; get a bigger
                  alphabet}%
    \fi
    \char\lccode\itemno
  }%
}

% The starting (uppercase) letter is in \thearg.
\def\uppercaseenumerate{%
  \itemno = \expandafter`\thearg
  \startenumeration{%
    % Be sure we're not beyond the end of the alphabet.
    \ifnum\itemno=0
      \errmessage{No more uppercase letters in @enumerate; get a bigger
                  alphabet}
    \fi
    \char\uccode\itemno
  }%
}

% Call itemizey, adding a period to the first argument and supplying the
% common last two arguments.  Also subtract one from the initial value in
% \itemno, since @item increments \itemno.
%
\def\startenumeration#1{%
  \advance\itemno by -1
  \itemizey{#1.}\Eenumerate\flushcr
}

% @alphaenumerate and @capsenumerate are abbreviations for giving an arg
% to @enumerate.
%
\def\alphaenumerate{\enumerate{a}}
\def\capsenumerate{\enumerate{A}}
\def\Ealphaenumerate{\Eenumerate}
\def\Ecapsenumerate{\Eenumerate}

% Definition of @item while inside @itemize.

\def\itemizeitem{%
\advance\itemno by 1
{\let\par=\endgraf \smallbreak}%
\ifhmode \errmessage{\in hmode at itemizeitem}\fi
{\parskip=0in \hskip 0pt
\hbox to 0pt{\hss \itemcontents\hskip \itemmargin}%
\vadjust{\penalty 1200}}%
\flushcr}

\message{indexing,}
% Index generation facilities

% Define \newwrite to be identical to plain tex's \newwrite
% except not \outer, so it can be used within \newindex.
{\catcode`\@=11
\gdef\newwrite{\alloc@7\write\chardef\sixt@@n}}

% \newindex {foo} defines an index named foo.
% It automatically defines \fooindex such that
% \fooindex ...rest of line... puts an entry in the index foo.
% It also defines \fooindfile to be the number of the output channel for
% the file that	accumulates this index.  The file's extension is foo.
% The name of an index should be no more than 2 characters long
% for the sake of vms.

\def\newindex #1{
\expandafter\newwrite \csname#1indfile\endcsname% Define number for output file
\openout \csname#1indfile\endcsname \jobname.#1	% Open the file
\expandafter\xdef\csname#1index\endcsname{%	% Define \xxxindex
\noexpand\doindex {#1}}
}

% @defindex foo  ==  \newindex{foo}

\def\defindex{\parsearg\newindex}

% Define @defcodeindex, like @defindex except put all entries in @code.

\def\newcodeindex #1{
\expandafter\newwrite \csname#1indfile\endcsname% Define number for output file
\openout \csname#1indfile\endcsname \jobname.#1	% Open the file
\expandafter\xdef\csname#1index\endcsname{%	% Define \xxxindex
\noexpand\docodeindex {#1}}
}

\def\defcodeindex{\parsearg\newcodeindex}

% @synindex foo bar    makes index foo feed into index bar.
% Do this instead of @defindex foo if you don't want it as a separate index.
\def\synindex #1 #2 {%
\expandafter\let\expandafter\synindexfoo\expandafter=\csname#2indfile\endcsname
\expandafter\let\csname#1indfile\endcsname=\synindexfoo
\expandafter\xdef\csname#1index\endcsname{%	% Define \xxxindex
\noexpand\doindex {#2}}%
}

% @syncodeindex foo bar   similar, but put all entries made for index foo
% inside @code.
\def\syncodeindex #1 #2 {%
\expandafter\let\expandafter\synindexfoo\expandafter=\csname#2indfile\endcsname
\expandafter\let\csname#1indfile\endcsname=\synindexfoo
\expandafter\xdef\csname#1index\endcsname{%	% Define \xxxindex
\noexpand\docodeindex {#2}}%
}

% Define \doindex, the driver for all \fooindex macros.
% Argument #1 is generated by the calling \fooindex macro,
%  and it is "foo", the name of the index.

% \doindex just uses \parsearg; it calls \doind for the actual work.
% This is because \doind is more useful to call from other macros.

% There is also \dosubind {index}{topic}{subtopic}
% which makes an entry in a two-level index such as the operation index.

\def\doindex#1{\edef\indexname{#1}\parsearg\singleindexer}
\def\singleindexer #1{\doind{\indexname}{#1}}

% like the previous two, but they put @code around the argument.
\def\docodeindex#1{\edef\indexname{#1}\parsearg\singlecodeindexer}
\def\singlecodeindexer #1{\doind{\indexname}{\code{#1}}}

\def\indexdummies{%
\def\_{{\realbackslash _}}%
\def\w{\realbackslash w }%
\def\bf{\realbackslash bf }%
\def\rm{\realbackslash rm }%
\def\sl{\realbackslash sl }%
\def\sf{\realbackslash sf}%
\def\tt{\realbackslash tt}%
\def\gtr{\realbackslash gtr}%
\def\less{\realbackslash less}%
\def\hat{\realbackslash hat}%
\def\char{\realbackslash char}%
\def\TeX{\realbackslash TeX}%
\def\dots{\realbackslash dots }%
\def\copyright{\realbackslash copyright }%
\def\tclose##1{\realbackslash tclose {##1}}%
\def\code##1{\realbackslash code {##1}}%
\def\samp##1{\realbackslash samp {##1}}%
\def\t##1{\realbackslash r {##1}}%
\def\r##1{\realbackslash r {##1}}%
\def\i##1{\realbackslash i {##1}}%
\def\b##1{\realbackslash b {##1}}%
\def\cite##1{\realbackslash cite {##1}}%
\def\key##1{\realbackslash key {##1}}%
\def\file##1{\realbackslash file {##1}}%
\def\var##1{\realbackslash var {##1}}%
\def\kbd##1{\realbackslash kbd {##1}}%
\def\dfn##1{\realbackslash dfn {##1}}%
\def\emph##1{\realbackslash emph {##1}}%
}

% \indexnofonts no-ops all font-change commands.
% This is used when outputting the strings to sort the index by.
\def\indexdummyfont#1{#1}
\def\indexdummytex{TeX}
\def\indexdummydots{...}

\def\indexnofonts{%
\let\w=\indexdummyfont
\let\t=\indexdummyfont
\let\r=\indexdummyfont
\let\i=\indexdummyfont
\let\b=\indexdummyfont
\let\emph=\indexdummyfont
\let\strong=\indexdummyfont
\let\cite=\indexdummyfont
\let\sc=\indexdummyfont
%Don't no-op \tt, since it isn't a user-level command
% and is used in the definitions of the active chars like <, >, |...
%\let\tt=\indexdummyfont
\let\tclose=\indexdummyfont
\let\code=\indexdummyfont
\let\file=\indexdummyfont
\let\samp=\indexdummyfont
\let\kbd=\indexdummyfont
\let\key=\indexdummyfont
\let\var=\indexdummyfont
\let\TeX=\indexdummytex
\let\dots=\indexdummydots
}

% To define \realbackslash, we must make \ not be an escape.
% We must first make another character (@) an escape
% so we do not become unable to do a definition.

{\catcode`\@=0 \catcode`\\=\other
@gdef@realbackslash{\}}

\let\indexbackslash=0  %overridden during \printindex.

\def\doind #1#2{%
{\count10=\lastpenalty %
{\indexdummies % Must do this here, since \bf, etc expand at this stage
\escapechar=`\\%
{\let\folio=0% Expand all macros now EXCEPT \folio
\def\rawbackslashxx{\indexbackslash}% \indexbackslash isn't defined now
% so it will be output as is; and it will print as backslash in the indx.
%
% Now process the index-string once, with all font commands turned off,
% to get the string to sort the index by.
{\indexnofonts
\xdef\temp1{#2}%
}%
% Now produce the complete index entry.  We process the index-string again,
% this time with font commands expanded, to get what to print in the index.
\edef\temp{%
\write \csname#1indfile\endcsname{%
\realbackslash entry {\temp1}{\folio}{#2}}}%
\temp }%
}\penalty\count10}}

\def\dosubind #1#2#3{%
{\count10=\lastpenalty %
{\indexdummies % Must do this here, since \bf, etc expand at this stage
\escapechar=`\\%
{\let\folio=0%
\def\rawbackslashxx{\indexbackslash}%
%
% Now process the index-string once, with all font commands turned off,
% to get the string to sort the index by.
{\indexnofonts
\xdef\temp1{#2 #3}%
}%
% Now produce the complete index entry.  We process the index-string again,
% this time with font commands expanded, to get what to print in the index.
\edef\temp{%
\write \csname#1indfile\endcsname{%
\realbackslash entry {\temp1}{\folio}{#2}{#3}}}%
\temp }%
}\penalty\count10}}

% The index entry written in the file actually looks like
%  \entry {sortstring}{page}{topic}
% or
%  \entry {sortstring}{page}{topic}{subtopic}
% The texindex program reads in these files and writes files
% containing these kinds of lines:
%  \initial {c}
%     before the first topic whose initial is c
%  \entry {topic}{pagelist}
%     for a topic that is used without subtopics
%  \primary {topic}
%     for the beginning of a topic that is used with subtopics
%  \secondary {subtopic}{pagelist}
%     for each subtopic.

% Define the user-accessible indexing commands
% @findex, @vindex, @kindex, @cindex.

\def\findex {\fnindex}
\def\kindex {\kyindex}
\def\cindex {\cpindex}
\def\vindex {\vrindex}
\def\tindex {\tpindex}
\def\pindex {\pgindex}

\def\cindexsub {\begingroup\obeylines\cindexsub}
{\obeylines %
\gdef\cindexsub "#1" #2^^M{\endgroup %
\dosubind{cp}{#2}{#1}}}

% Define the macros used in formatting output of the sorted index material.

% This is what you call to cause a particular index to get printed.
% Write
% @unnumbered Function Index
% @printindex fn

\def\printindex{\parsearg\doprintindex}

\def\doprintindex#1{%
  \tex
  \dobreak \chapheadingskip {10000}
  \catcode`\%=\other\catcode`\&=\other\catcode`\#=\other
  \catcode`\$=\other\catcode`\_=\other
  \catcode`\~=\other
  %
  % The following don't help, since the chars were translated
  % when the raw index was written, and their fonts were discarded
  % due to \indexnofonts.
  %\catcode`\"=\active
  %\catcode`\^=\active
  %\catcode`\_=\active
  %\catcode`\|=\active
  %\catcode`\<=\active
  %\catcode`\>=\active
  % %
  \def\indexbackslash{\rawbackslashxx}
  \indexfonts\rm \tolerance=9500 \advance\baselineskip -1pt
  \begindoublecolumns
  %
  % See if the index file exists and is nonempty.
  \openin 1 \jobname.#1s
  \ifeof 1
    % \enddoublecolumns gets confused if there is no text in the index,
    % and it loses the chapter title and the aux file entries for the
    % index.  The easiest way to prevent this problem is to make sure
    % there is some text.
    (Index is nonexistent)
    \else
    %
    % If the index file exists but is empty, then \openin leaves \ifeof
    % false.  We have to make TeX try to read something from the file, so
    % it can discover if there is anything in it.
    \read 1 to \temp
    \ifeof 1
      (Index is empty)
    \else
      \input \jobname.#1s
    \fi
  \fi
  \closein 1
  \enddoublecolumns
  \Etex
}

% These macros are used by the sorted index file itself.
% Change them to control the appearance of the index.

% Same as \bigskipamount except no shrink.
% \balancecolumns gets confused if there is any shrink.
\newskip\initialskipamount \initialskipamount 12pt plus4pt

\def\initial #1{%
{\let\tentt=\sectt \let\tt=\sectt \let\sf=\sectt
\ifdim\lastskip<\initialskipamount
\removelastskip \penalty-200 \vskip \initialskipamount\fi
\line{\secbf#1\hfill}\kern 2pt\penalty10000}}

% This typesets a paragraph consisting of #1, dot leaders, and then #2
% flush to the right margin.  It is used for index and table of contents
% entries.  The paragraph is indented by \leftskip.
%
\def\entry #1#2{\begingroup
  %
  % Start a new paragraph if necessary, so our assignments below can't
  % affect previous text.
  \par
  %
  % Do not fill out the last line with white space.
  \parfillskip = 0in
  %
  % No extra space above this paragraph.
  \parskip = 0in
  %
  % Do not prefer a separate line ending with a hyphen to fewer lines.
  \finalhyphendemerits = 0
  %
  % \hangindent is only relevant when the entry text and page number
  % don't both fit on one line.  In that case, bob suggests starting the
  % dots pretty far over on the line.  Unfortunately, a large
  % indentation looks wrong when the entry text itself is broken across
  % lines.  So we use a small indentation and put up with long leaders.
  %
  % \hangafter is reset to 1 (which is the value we want) at the start
  % of each paragraph, so we need not do anything with that.
  \hangindent=2em
  %
  % When the entry text needs to be broken, just fill out the first line
  % with blank space.
  \rightskip = 0pt plus1fil
  %
  % Start a ``paragraph'' for the index entry so the line breaking
  % parameters we've set above will have an effect.
  \noindent
  %
  % Insert the text of the index entry.  TeX will do line-breaking on it.
  #1%
  % If there are no page numbers, don't output a line of dots.
  \def\tempa{#2}
  \def\tempb{}
  \ifx\tempa\tempb\ \else
    %
    % If we must, put the page number on a line of its own, and fill out
    % this line with blank space.  (The \hfil is overwhelmed with the
    % fill leaders glue in \indexdotfill if the page number does fit.)
    \hfil\penalty50
    \null\nobreak\indexdotfill % Have leaders before the page number.
    %
    % The `\ ' here is removed by the implicit \unskip that TeX does as
    % part of (the primitive) \par.  Without it, a spurious underfull
    % \hbox ensues.
    \ #2% The page number ends the paragraph.
  \fi%
  \par
\endgroup}

% Like \dotfill except takes at least 1 em.
\def\indexdotfill{\cleaders
  \hbox{$\mathsurround=0pt \mkern1.5mu . \mkern1.5mu$}\hskip 1em plus 1fill}

\def\primary #1{\line{#1\hfil}}

\newskip\secondaryindent \secondaryindent=0.5cm

\def\secondary #1#2{
{\parfillskip=0in \parskip=0in
\hangindent =1in \hangafter=1
\noindent\hskip\secondaryindent\hbox{#1}\indexdotfill #2\par
}}

%% Define two-column mode, which is used in indexes.
%% Adapted from the TeXbook, page 416.
\catcode `\@=11

\newbox\partialpage

\newdimen\doublecolumnhsize

\def\begindoublecolumns{\begingroup
  % Grab any single-column material above us.
  \output = {\global\setbox\partialpage
    =\vbox{\unvbox255\kern -\topskip \kern \baselineskip}}%
  \eject
  %
  % Now switch to the double-column output routine.
  \output={\doublecolumnout}%
  %
  % Change the page size parameters.  We could do this once outside this
  % routine, in each of @smallbook, @afourpaper, and the default 8.5x11
  % format, but then we repeat the same computation.  Repeating a couple
  % of assignments once per index is clearly meaningless for the
  % execution time, so we may as well do it once.
  %
  % First we halve the line length, less a little for the gutter between
  % the columns.  We compute the gutter based on the line length, so it
  % changes automatically with the paper format.  The magic constant
  % below is chosen so that the gutter has the same value (well, +- <
  % 1pt) as it did when we hard-coded it.
  %
  % We put the result in a separate register, \doublecolumhsize, so we
  % can restore it in \pagesofar, after \hsize itself has (potentially)
  % been clobbered.
  %
  \doublecolumnhsize = \hsize
    \advance\doublecolumnhsize by -.04154\hsize
    \divide\doublecolumnhsize by 2
  \hsize = \doublecolumnhsize
  %
  % Double the \vsize as well.  (We don't need a separate register here,
  % since nobody clobbers \vsize.)
  \vsize = 2\vsize
  \doublecolumnpagegoal
}

\def\enddoublecolumns{\eject \endgroup \pagegoal=\vsize \unvbox\partialpage}

\def\doublecolumnsplit{\splittopskip=\topskip \splitmaxdepth=\maxdepth
  \global\dimen@=\pageheight \global\advance\dimen@ by-\ht\partialpage
  \global\setbox1=\vsplit255 to\dimen@ \global\setbox0=\vbox{\unvbox1}
  \global\setbox3=\vsplit255 to\dimen@ \global\setbox2=\vbox{\unvbox3}
  \ifdim\ht0>\dimen@ \setbox255=\vbox{\unvbox0\unvbox2} \global\setbox255=\copy5 \fi
  \ifdim\ht2>\dimen@ \setbox255=\vbox{\unvbox0\unvbox2} \global\setbox255=\copy5 \fi
}
\def\doublecolumnpagegoal{%
  \dimen@=\vsize \advance\dimen@ by-2\ht\partialpage \global\pagegoal=\dimen@
}
\def\pagesofar{\unvbox\partialpage %
  \hsize=\doublecolumnhsize % have to restore this since output routine
  \wd0=\hsize \wd2=\hsize \hbox to\pagewidth{\box0\hfil\box2}}
\def\doublecolumnout{%
  \setbox5=\copy255
  {\vbadness=10000 \doublecolumnsplit}
  \ifvbox255
    \setbox0=\vtop to\dimen@{\unvbox0}
    \setbox2=\vtop to\dimen@{\unvbox2}
    \onepageout\pagesofar \unvbox255 \penalty\outputpenalty
  \else
    \setbox0=\vbox{\unvbox5}
    \ifvbox0
      \dimen@=\ht0 \advance\dimen@ by\topskip \advance\dimen@ by-\baselineskip
      \divide\dimen@ by2 \splittopskip=\topskip \splitmaxdepth=\maxdepth
      {\vbadness=10000
	\loop \global\setbox5=\copy0
          \setbox1=\vsplit5 to\dimen@
          \setbox3=\vsplit5 to\dimen@
          \ifvbox5 \global\advance\dimen@ by1pt \repeat
        \setbox0=\vbox to\dimen@{\unvbox1}
        \setbox2=\vbox to\dimen@{\unvbox3}
        \global\setbox\partialpage=\vbox{\pagesofar}
        \doublecolumnpagegoal
      }
    \fi
  \fi
}

\catcode `\@=\other
\message{sectioning,}
% Define chapters, sections, etc.

\newcount \chapno
\newcount \secno        \secno=0
\newcount \subsecno     \subsecno=0
\newcount \subsubsecno  \subsubsecno=0

% This counter is funny since it counts through charcodes of letters A, B, ...
\newcount \appendixno  \appendixno = `\@
\def\appendixletter{\char\the\appendixno}

\newwrite \contentsfile
% This is called from \setfilename.
\def\opencontents{\openout \contentsfile = \jobname.toc}

% Each @chapter defines this as the name of the chapter.
% page headings and footings can use it.  @section does likewise

\def\thischapter{} \def\thissection{}
\def\seccheck#1{\if \pageno<0 %
\errmessage{@#1 not allowed after generating table of contents}\fi
%
}

\def\chapternofonts{%
\let\rawbackslash=\relax%
\let\frenchspacing=\relax%
\def\result{\realbackslash result}
\def\equiv{\realbackslash equiv}
\def\expansion{\realbackslash expansion}
\def\print{\realbackslash print}
\def\TeX{\realbackslash TeX}
\def\dots{\realbackslash dots}
\def\copyright{\realbackslash copyright}
\def\tt{\realbackslash tt}
\def\bf{\realbackslash bf }
\def\w{\realbackslash w}
\def\less{\realbackslash less}
\def\gtr{\realbackslash gtr}
\def\hat{\realbackslash hat}
\def\char{\realbackslash char}
\def\tclose##1{\realbackslash tclose {##1}}
\def\code##1{\realbackslash code {##1}}
\def\samp##1{\realbackslash samp {##1}}
\def\r##1{\realbackslash r {##1}}
\def\b##1{\realbackslash b {##1}}
\def\key##1{\realbackslash key {##1}}
\def\file##1{\realbackslash file {##1}}
\def\kbd##1{\realbackslash kbd {##1}}
% These are redefined because @smartitalic wouldn't work inside xdef.
\def\i##1{\realbackslash i {##1}}
\def\cite##1{\realbackslash cite {##1}}
\def\var##1{\realbackslash var {##1}}
\def\emph##1{\realbackslash emph {##1}}
\def\dfn##1{\realbackslash dfn {##1}}
}

\newcount\absseclevel % used to calculate proper heading level
\newcount\secbase\secbase=0 % @raise/lowersections modify this count

% @raisesections: treat @section as chapter, @subsection as section, etc.
\def\raisesections{\global\advance\secbase by -1}
\let\up=\raisesections % original BFox name

% @lowersections: treat @chapter as section, @section as subsection, etc.
\def\lowersections{\global\advance\secbase by 1}
\let\down=\lowersections % original BFox name

% Choose a numbered-heading macro
% #1 is heading level if unmodified by @raisesections or @lowersections
% #2 is text for heading
\def\numhead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
\ifcase\absseclevel
  \chapterzzz{#2}
\or
  \seczzz{#2}
\or
  \numberedsubseczzz{#2}
\or
  \numberedsubsubseczzz{#2}
\else
  \ifnum \absseclevel<0
    \chapterzzz{#2}
  \else
    \numberedsubsubseczzz{#2}
  \fi
\fi
}

% like \numhead, but chooses appendix heading levels
\def\apphead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
\ifcase\absseclevel
  \appendixzzz{#2}
\or
  \appendixsectionzzz{#2}
\or
  \appendixsubseczzz{#2}
\or
  \appendixsubsubseczzz{#2}
\else
  \ifnum \absseclevel<0
    \appendixzzz{#2}
  \else
    \appendixsubsubseczzz{#2}
  \fi
\fi
}

% like \numhead, but chooses numberless heading levels
\def\unnmhead#1#2{\absseclevel=\secbase\advance\absseclevel by #1
\ifcase\absseclevel
  \unnumberedzzz{#2}
\or
  \unnumberedseczzz{#2}
\or
  \unnumberedsubseczzz{#2}
\or
  \unnumberedsubsubseczzz{#2}
\else
  \ifnum \absseclevel<0
    \unnumberedzzz{#2}
  \else
    \unnumberedsubsubseczzz{#2}
  \fi
\fi
}


\def\thischaptername{No Chapter Title}
\outer\def\chapter{\parsearg\chapteryyy}
\def\chapteryyy #1{\numhead0{#1}} % normally numhead0 calls chapterzzz
\def\chapterzzz #1{\seccheck{chapter}%
\secno=0 \subsecno=0 \subsubsecno=0
\global\advance \chapno by 1 \message{Chapter \the\chapno}%
\chapmacro {#1}{\the\chapno}%
\gdef\thissection{#1}%
\gdef\thischaptername{#1}%
% We don't substitute the actual chapter name into \thischapter
% because we don't want its macros evaluated now.
\xdef\thischapter{Chapter \the\chapno: \noexpand\thischaptername}%
{\chapternofonts%
\edef\temp{{\realbackslash chapentry {#1}{\the\chapno}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp  %
\donoderef %
\global\let\section = \numberedsec
\global\let\subsection = \numberedsubsec
\global\let\subsubsection = \numberedsubsubsec
}}

\outer\def\appendix{\parsearg\appendixyyy}
\def\appendixyyy #1{\apphead0{#1}} % normally apphead0 calls appendixzzz
\def\appendixzzz #1{\seccheck{appendix}%
\secno=0 \subsecno=0 \subsubsecno=0
\global\advance \appendixno by 1 \message{Appendix \appendixletter}%
\chapmacro {#1}{Appendix \appendixletter}%
\gdef\thissection{#1}%
\gdef\thischaptername{#1}%
\xdef\thischapter{Appendix \appendixletter: \noexpand\thischaptername}%
{\chapternofonts%
\edef\temp{{\realbackslash chapentry
  {#1}{Appendix \appendixletter}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp  %
\appendixnoderef %
\global\let\section = \appendixsec
\global\let\subsection = \appendixsubsec
\global\let\subsubsection = \appendixsubsubsec
}}

\outer\def\top{\parsearg\unnumberedyyy}
\outer\def\unnumbered{\parsearg\unnumberedyyy}
\def\unnumberedyyy #1{\unnmhead0{#1}} % normally unnmhead0 calls unnumberedzzz
\def\unnumberedzzz #1{\seccheck{unnumbered}%
\secno=0 \subsecno=0 \subsubsecno=0
%
% This used to be simply \message{#1}, but TeX fully expands the
% argument to \message.  Therefore, if #1 contained @-commands, TeX
% expanded them.  For example, in `@unnumbered The @cite{Book}', TeX
% expanded @cite (which turns out to cause errors because \cite is meant
% to be executed, not expanded).
%
% Anyway, we don't want the fully-expanded definition of @cite to appear
% as a result of the \message, we just want `@cite' itself.  We use
% \the<toks register> to achieve this: TeX expands \the<toks> only once,
% simply yielding the contents of the <toks register>.
\toks0 = {#1}\message{(\the\toks0)}%
%
\unnumbchapmacro {#1}%
\gdef\thischapter{#1}\gdef\thissection{#1}%
{\chapternofonts%
\edef\temp{{\realbackslash unnumbchapentry {#1}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp  %
\unnumbnoderef %
\global\let\section = \unnumberedsec
\global\let\subsection = \unnumberedsubsec
\global\let\subsubsection = \unnumberedsubsubsec
}}

\outer\def\numberedsec{\parsearg\secyyy}
\def\secyyy #1{\numhead1{#1}} % normally calls seczzz
\def\seczzz #1{\seccheck{section}%
\subsecno=0 \subsubsecno=0 \global\advance \secno by 1 %
\gdef\thissection{#1}\secheading {#1}{\the\chapno}{\the\secno}%
{\chapternofonts%
\edef\temp{{\realbackslash secentry %
{#1}{\the\chapno}{\the\secno}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp %
\donoderef %
\penalty 10000 %
}}

\outer\def\appenixsection{\parsearg\appendixsecyyy}
\outer\def\appendixsec{\parsearg\appendixsecyyy}
\def\appendixsecyyy #1{\apphead1{#1}} % normally calls appendixsectionzzz
\def\appendixsectionzzz #1{\seccheck{appendixsection}%
\subsecno=0 \subsubsecno=0 \global\advance \secno by 1 %
\gdef\thissection{#1}\secheading {#1}{\appendixletter}{\the\secno}%
{\chapternofonts%
\edef\temp{{\realbackslash secentry %
{#1}{\appendixletter}{\the\secno}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp %
\appendixnoderef %
\penalty 10000 %
}}

\outer\def\unnumberedsec{\parsearg\unnumberedsecyyy}
\def\unnumberedsecyyy #1{\unnmhead1{#1}} % normally calls unnumberedseczzz
\def\unnumberedseczzz #1{\seccheck{unnumberedsec}%
\plainsecheading {#1}\gdef\thissection{#1}%
{\chapternofonts%
\edef\temp{{\realbackslash unnumbsecentry{#1}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp %
\unnumbnoderef %
\penalty 10000 %
}}

\outer\def\numberedsubsec{\parsearg\numberedsubsecyyy}
\def\numberedsubsecyyy #1{\numhead2{#1}} % normally calls numberedsubseczzz
\def\numberedsubseczzz #1{\seccheck{subsection}%
\gdef\thissection{#1}\subsubsecno=0 \global\advance \subsecno by 1 %
\subsecheading {#1}{\the\chapno}{\the\secno}{\the\subsecno}%
{\chapternofonts%
\edef\temp{{\realbackslash subsecentry %
{#1}{\the\chapno}{\the\secno}{\the\subsecno}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp %
\donoderef %
\penalty 10000 %
}}

\outer\def\appendixsubsec{\parsearg\appendixsubsecyyy}
\def\appendixsubsecyyy #1{\apphead2{#1}} % normally calls appendixsubseczzz
\def\appendixsubseczzz #1{\seccheck{appendixsubsec}%
\gdef\thissection{#1}\subsubsecno=0 \global\advance \subsecno by 1 %
\subsecheading {#1}{\appendixletter}{\the\secno}{\the\subsecno}%
{\chapternofonts%
\edef\temp{{\realbackslash subsecentry %
{#1}{\appendixletter}{\the\secno}{\the\subsecno}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp %
\appendixnoderef %
\penalty 10000 %
}}

\outer\def\unnumberedsubsec{\parsearg\unnumberedsubsecyyy}
\def\unnumberedsubsecyyy #1{\unnmhead2{#1}} %normally calls unnumberedsubseczzz
\def\unnumberedsubseczzz #1{\seccheck{unnumberedsubsec}%
\plainsecheading {#1}\gdef\thissection{#1}%
{\chapternofonts%
\edef\temp{{\realbackslash unnumbsubsecentry{#1}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp %
\unnumbnoderef %
\penalty 10000 %
}}

\outer\def\numberedsubsubsec{\parsearg\numberedsubsubsecyyy}
\def\numberedsubsubsecyyy #1{\numhead3{#1}} % normally numberedsubsubseczzz
\def\numberedsubsubseczzz #1{\seccheck{subsubsection}%
\gdef\thissection{#1}\global\advance \subsubsecno by 1 %
\subsubsecheading {#1}
  {\the\chapno}{\the\secno}{\the\subsecno}{\the\subsubsecno}%
{\chapternofonts%
\edef\temp{{\realbackslash subsubsecentry %
  {#1}
  {\the\chapno}{\the\secno}{\the\subsecno}{\the\subsubsecno}
  {\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp %
\donoderef %
\penalty 10000 %
}}

\outer\def\appendixsubsubsec{\parsearg\appendixsubsubsecyyy}
\def\appendixsubsubsecyyy #1{\apphead3{#1}} % normally appendixsubsubseczzz
\def\appendixsubsubseczzz #1{\seccheck{appendixsubsubsec}%
\gdef\thissection{#1}\global\advance \subsubsecno by 1 %
\subsubsecheading {#1}
  {\appendixletter}{\the\secno}{\the\subsecno}{\the\subsubsecno}%
{\chapternofonts%
\edef\temp{{\realbackslash subsubsecentry{#1}%
  {\appendixletter}
  {\the\secno}{\the\subsecno}{\the\subsubsecno}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp %
\appendixnoderef %
\penalty 10000 %
}}

\outer\def\unnumberedsubsubsec{\parsearg\unnumberedsubsubsecyyy}
\def\unnumberedsubsubsecyyy #1{\unnmhead3{#1}} %normally unnumberedsubsubseczzz
\def\unnumberedsubsubseczzz #1{\seccheck{unnumberedsubsubsec}%
\plainsecheading {#1}\gdef\thissection{#1}%
{\chapternofonts%
\edef\temp{{\realbackslash unnumbsubsubsecentry{#1}{\noexpand\folio}}}%
\escapechar=`\\%
\write \contentsfile \temp %
\unnumbnoderef %
\penalty 10000 %
}}

% These are variants which are not "outer", so they can appear in @ifinfo.
% Actually, they should now be obsolete; ordinary section commands should work.
\def\infotop{\parsearg\unnumberedzzz}
\def\infounnumbered{\parsearg\unnumberedzzz}
\def\infounnumberedsec{\parsearg\unnumberedseczzz}
\def\infounnumberedsubsec{\parsearg\unnumberedsubseczzz}
\def\infounnumberedsubsubsec{\parsearg\unnumberedsubsubseczzz}

\def\infoappendix{\parsearg\appendixzzz}
\def\infoappendixsec{\parsearg\appendixseczzz}
\def\infoappendixsubsec{\parsearg\appendixsubseczzz}
\def\infoappendixsubsubsec{\parsearg\appendixsubsubseczzz}

\def\infochapter{\parsearg\chapterzzz}
\def\infosection{\parsearg\sectionzzz}
\def\infosubsection{\parsearg\subsectionzzz}
\def\infosubsubsection{\parsearg\subsubsectionzzz}

% These macros control what the section commands do, according
% to what kind of chapter we are in (ordinary, appendix, or unnumbered).
% Define them by default for a numbered chapter.
\global\let\section = \numberedsec
\global\let\subsection = \numberedsubsec
\global\let\subsubsection = \numberedsubsubsec

% Define @majorheading, @heading and @subheading

% NOTE on use of \vbox for chapter headings, section headings, and
% such:
%	1) We use \vbox rather than the earlier \line to permit
%	   overlong headings to fold.
%	2) \hyphenpenalty is set to 10000 because hyphenation in a
%	   heading is obnoxious; this forbids it.
%       3) Likewise, headings look best if no \parindent is used, and
%          if justification is not attempted.  Hence \raggedright.


\def\majorheading{\parsearg\majorheadingzzz}
\def\majorheadingzzz #1{%
{\advance\chapheadingskip by 10pt \chapbreak }%
{\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
                  \parindent=0pt\raggedright
                  \rm #1\hfill}}\bigskip \par\penalty 200}

\def\chapheading{\parsearg\chapheadingzzz}
\def\chapheadingzzz #1{\chapbreak %
{\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
                  \parindent=0pt\raggedright
                  \rm #1\hfill}}\bigskip \par\penalty 200}

\def\heading{\parsearg\secheadingi}

\def\subheading{\parsearg\subsecheadingi}

\def\subsubheading{\parsearg\subsubsecheadingi}

% These macros generate a chapter, section, etc. heading only
% (including whitespace, linebreaking, etc. around it),
% given all the information in convenient, parsed form.

%%% Args are the skip and penalty (usually negative)
\def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}

\def\setchapterstyle #1 {\csname CHAPF#1\endcsname}

%%% Define plain chapter starts, and page on/off switching for it
% Parameter controlling skip before chapter headings (if needed)

\newskip \chapheadingskip \chapheadingskip = 30pt plus 8pt minus 4pt

\def\chapbreak{\dobreak \chapheadingskip {-4000}}
\def\chappager{\par\vfill\supereject}
\def\chapoddpage{\chappager \ifodd\pageno \else \hbox to 0pt{} \chappager\fi}

\def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}

\def\CHAPPAGoff{
\global\let\pchapsepmacro=\chapbreak
\global\let\pagealignmacro=\chappager}

\def\CHAPPAGon{
\global\let\pchapsepmacro=\chappager
\global\let\pagealignmacro=\chappager
\global\def\HEADINGSon{\HEADINGSsingle}}

\def\CHAPPAGodd{
\global\let\pchapsepmacro=\chapoddpage
\global\let\pagealignmacro=\chapoddpage
\global\def\HEADINGSon{\HEADINGSdouble}}

\CHAPPAGon

\def\CHAPFplain{
\global\let\chapmacro=\chfplain
\global\let\unnumbchapmacro=\unnchfplain}

\def\chfplain #1#2{%
  \pchapsepmacro
  {%
    \chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
                     \parindent=0pt\raggedright
                     \rm #2\enspace #1}%
  }%
  \bigskip
  \penalty5000
}

\def\unnchfplain #1{%
\pchapsepmacro %
{\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
                  \parindent=0pt\raggedright
                  \rm #1\hfill}}\bigskip \par\penalty 10000 %
}
\CHAPFplain % The default

\def\unnchfopen #1{%
\chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
                       \parindent=0pt\raggedright
                       \rm #1\hfill}}\bigskip \par\penalty 10000 %
}

\def\chfopen #1#2{\chapoddpage {\chapfonts
\vbox to 3in{\vfil \hbox to\hsize{\hfil #2} \hbox to\hsize{\hfil #1} \vfil}}%
\par\penalty 5000 %
}

\def\CHAPFopen{
\global\let\chapmacro=\chfopen
\global\let\unnumbchapmacro=\unnchfopen}

% Parameter controlling skip before section headings.

\newskip \subsecheadingskip  \subsecheadingskip = 17pt plus 8pt minus 4pt
\def\subsecheadingbreak{\dobreak \subsecheadingskip {-500}}

\newskip \secheadingskip  \secheadingskip = 21pt plus 8pt minus 4pt
\def\secheadingbreak{\dobreak \secheadingskip {-1000}}

% @paragraphindent  is defined for the Info formatting commands only.
\let\paragraphindent=\comment

% Section fonts are the base font at magstep2, which produces
% a size a bit more than 14 points in the default situation.

\def\secheading #1#2#3{\secheadingi {#2.#3\enspace #1}}
\def\plainsecheading #1{\secheadingi {#1}}
\def\secheadingi #1{{\advance \secheadingskip by \parskip %
\secheadingbreak}%
{\secfonts \vbox{\hyphenpenalty=10000\tolerance=5000
                 \parindent=0pt\raggedright
                 \rm #1\hfill}}%
\ifdim \parskip<10pt \kern 10pt\kern -\parskip\fi \penalty 10000 }


% Subsection fonts are the base font at magstep1,
% which produces a size of 12 points.

\def\subsecheading #1#2#3#4{\subsecheadingi {#2.#3.#4\enspace #1}}
\def\subsecheadingi #1{{\advance \subsecheadingskip by \parskip %
\subsecheadingbreak}%
{\subsecfonts \vbox{\hyphenpenalty=10000\tolerance=5000
                     \parindent=0pt\raggedright
                     \rm #1\hfill}}%
\ifdim \parskip<10pt \kern 10pt\kern -\parskip\fi \penalty 10000 }

\def\subsubsecfonts{\subsecfonts} % Maybe this should change:
				  % Perhaps make sssec fonts scaled
				  % magstep half
\def\subsubsecheading #1#2#3#4#5{\subsubsecheadingi {#2.#3.#4.#5\enspace #1}}
\def\subsubsecheadingi #1{{\advance \subsecheadingskip by \parskip %
\subsecheadingbreak}%
{\subsubsecfonts \vbox{\hyphenpenalty=10000\tolerance=5000
                       \parindent=0pt\raggedright
                       \rm #1\hfill}}%
\ifdim \parskip<10pt \kern 10pt\kern -\parskip\fi \penalty 10000}


\message{toc printing,}

% Finish up the main text and prepare to read what we've written
% to \contentsfile.

\newskip\contentsrightmargin \contentsrightmargin=1in
\def\startcontents#1{%
   \pagealignmacro
   \immediate\closeout \contentsfile
   \ifnum \pageno>0
      \pageno = -1		% Request roman numbered pages.
   \fi
   % Don't need to put `Contents' or `Short Contents' in the headline.
   % It is abundantly clear what they are.
   \unnumbchapmacro{#1}\def\thischapter{}%
   \begingroup   		% Set up to handle contents files properly.
      \catcode`\\=0  \catcode`\{=1  \catcode`\}=2  \catcode`\@=11
      \raggedbottom             % Worry more about breakpoints than the bottom.
      \advance\hsize by -\contentsrightmargin % Don't use the full line length.
}


% Normal (long) toc.
\outer\def\contents{%
   \startcontents{Table of Contents}%
      \input \jobname.toc
   \endgroup
   \vfill \eject
}

% And just the chapters.
\outer\def\summarycontents{%
   \startcontents{Short Contents}%
      %
      \let\chapentry = \shortchapentry
      \let\unnumbchapentry = \shortunnumberedentry
      % We want a true roman here for the page numbers.
      \secfonts
      \let\rm=\shortcontrm \let\bf=\shortcontbf \let\sl=\shortcontsl
      \rm
      \advance\baselineskip by 1pt % Open it up a little.
      \def\secentry ##1##2##3##4{}
      \def\unnumbsecentry ##1##2{}
      \def\subsecentry ##1##2##3##4##5{}
      \def\unnumbsubsecentry ##1##2{}
      \def\subsubsecentry ##1##2##3##4##5##6{}
      \def\unnumbsubsubsecentry ##1##2{}
      \input \jobname.toc
   \endgroup
   \vfill \eject
}
\let\shortcontents = \summarycontents

% These macros generate individual entries in the table of contents.
% The first argument is the chapter or section name.
% The last argument is the page number.
% The arguments in between are the chapter number, section number, ...

% Chapter-level things, for both the long and short contents.
\def\chapentry#1#2#3{\dochapentry{#2\labelspace#1}{#3}}

% See comments in \dochapentry re vbox and related settings
\def\shortchapentry#1#2#3{%
  \tocentry{\shortchaplabel{#2}\labelspace #1}{\doshortpageno{#3}}%
}

% Typeset the label for a chapter or appendix for the short contents.
% The arg is, e.g. `Appendix A' for an appendix, or `3' for a chapter.
% We could simplify the code here by writing out an \appendixentry
% command in the toc file for appendices, instead of using \chapentry
% for both, but it doesn't seem worth it.
\setbox0 = \hbox{\shortcontrm Appendix }
\newdimen\shortappendixwidth \shortappendixwidth = \wd0

\def\shortchaplabel#1{%
  % We typeset #1 in a box of constant width, regardless of the text of
  % #1, so the chapter titles will come out aligned.
  \setbox0 = \hbox{#1}%
  \dimen0 = \ifdim\wd0 > \shortappendixwidth \shortappendixwidth \else 0pt \fi
  %
  % This space should be plenty, since a single number is .5em, and the
  % widest letter (M) is 1em, at least in the Computer Modern fonts.
  % (This space doesn't include the extra space that gets added after
  % the label; that gets put in in \shortchapentry above.)
  \advance\dimen0 by 1.1em
  \hbox to \dimen0{#1\hfil}%
}

\def\unnumbchapentry#1#2{\dochapentry{#1}{#2}}
\def\shortunnumberedentry#1#2{\tocentry{#1}{\doshortpageno{#2}}}

% Sections.
\def\secentry#1#2#3#4{\dosecentry{#2.#3\labelspace#1}{#4}}
\def\unnumbsecentry#1#2{\dosecentry{#1}{#2}}

% Subsections.
\def\subsecentry#1#2#3#4#5{\dosubsecentry{#2.#3.#4\labelspace#1}{#5}}
\def\unnumbsubsecentry#1#2{\dosubsecentry{#1}{#2}}

% And subsubsections.
\def\subsubsecentry#1#2#3#4#5#6{%
  \dosubsubsecentry{#2.#3.#4.#5\labelspace#1}{#6}}
\def\unnumbsubsubsecentry#1#2{\dosubsubsecentry{#1}{#2}}


% This parameter controls the indentation of the various levels.
\newdimen\tocindent \tocindent = 3pc

% Now for the actual typesetting. In all these, #1 is the text and #2 is the
% page number.
%
% If the toc has to be broken over pages, we would want to be at chapters
% if at all possible; hence the \penalty.
\def\dochapentry#1#2{%
   \penalty-300 \vskip\baselineskip
   \begingroup
     \chapentryfonts
     \tocentry{#1}{\dopageno{#2}}%
   \endgroup
   \nobreak\vskip .25\baselineskip
}

\def\dosecentry#1#2{\begingroup
  \secentryfonts \leftskip=\tocindent
  \tocentry{#1}{\dopageno{#2}}%
\endgroup}

\def\dosubsecentry#1#2{\begingroup
  \subsecentryfonts \leftskip=2\tocindent
  \tocentry{#1}{\dopageno{#2}}%
\endgroup}

\def\dosubsubsecentry#1#2{\begingroup
  \subsubsecentryfonts \leftskip=3\tocindent
  \tocentry{#1}{\dopageno{#2}}%
\endgroup}

% Final typesetting of a toc entry; we use the same \entry macro as for
% the index entries, but we want to suppress hyphenation here.  (We
% can't do that in the \entry macro, since index entries might consist
% of hyphenated-identifiers-that-do-not-fit-on-a-line-and-nothing-else.)
%
\def\tocentry#1#2{\begingroup
  \hyphenpenalty = 10000
  \entry{#1}{#2}%
\endgroup}

% Space between chapter (or whatever) number and the title.
\def\labelspace{\hskip1em \relax}

\def\dopageno#1{{\rm #1}}
\def\doshortpageno#1{{\rm #1}}

\def\chapentryfonts{\secfonts \rm}
\def\secentryfonts{\textfonts}
\let\subsecentryfonts = \textfonts
\let\subsubsecentryfonts = \textfonts


\message{environments,}

% Since these characters are used in examples, it should be an even number of
% \tt widths. Each \tt character is 1en, so two makes it 1em.
% Furthermore, these definitions must come after we define our fonts.
\newbox\dblarrowbox    \newbox\longdblarrowbox
\newbox\pushcharbox    \newbox\bullbox
\newbox\equivbox       \newbox\errorbox

\let\ptexequiv = \equiv

%{\tentt
%\global\setbox\dblarrowbox = \hbox to 1em{\hfil$\Rightarrow$\hfil}
%\global\setbox\longdblarrowbox = \hbox to 1em{\hfil$\mapsto$\hfil}
%\global\setbox\pushcharbox = \hbox to 1em{\hfil$\dashv$\hfil}
%\global\setbox\equivbox = \hbox to 1em{\hfil$\ptexequiv$\hfil}
% Adapted from the manmac format (p.420 of TeXbook)
%\global\setbox\bullbox = \hbox to 1em{\kern.15em\vrule height .75ex width .85ex
%                                      depth .1ex\hfil}
%}

\def\point{$\star$}

\def\result{\leavevmode\raise.15ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
\def\expansion{\leavevmode\raise.1ex\hbox to 1em{\hfil$\mapsto$\hfil}}
\def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}

\def\equiv{\leavevmode\lower.1ex\hbox to 1em{\hfil$\ptexequiv$\hfil}}

% Adapted from the TeXbook's \boxit.
{\tentt \global\dimen0 = 3em}% Width of the box.
\dimen2 = .55pt % Thickness of rules
% The text. (`r' is open on the right, `e' somewhat less so on the left.)
\setbox0 = \hbox{\kern-.75pt \tensf error\kern-1.5pt}

\global\setbox\errorbox=\hbox to \dimen0{\hfil
   \hsize = \dimen0 \advance\hsize by -5.8pt % Space to left+right.
   \advance\hsize by -2\dimen2 % Rules.
   \vbox{
      \hrule height\dimen2
      \hbox{\vrule width\dimen2 \kern3pt          % Space to left of text.
         \vtop{\kern2.4pt \box0 \kern2.4pt}% Space above/below.
         \kern3pt\vrule width\dimen2}% Space to right.
      \hrule height\dimen2}
    \hfil}

% The @error{} command.
\def\error{\leavevmode\lower.7ex\copy\errorbox}

% @tex ... @end tex    escapes into raw Tex temporarily.
% One exception: @ is still an escape character, so that @end tex works.
% But \@ or @@ will get a plain tex @ character.

\def\tex{\begingroup
\catcode `\\=0 \catcode `\{=1 \catcode `\}=2
\catcode `\$=3 \catcode `\&=4 \catcode `\#=6
\catcode `\^=7 \catcode `\_=8 \catcode `\~=13 \let~=\tie
\catcode `\%=14
\catcode 43=12
\catcode`\"=12
\catcode`\==12
\catcode`\|=12
\catcode`\<=12
\catcode`\>=12
\escapechar=`\\
%
\let\{=\ptexlbrace
\let\}=\ptexrbrace
\let\.=\ptexdot
\let\*=\ptexstar
\let\dots=\ptexdots
\def\@{@}%
\let\bullet=\ptexbullet
\let\b=\ptexb \let\c=\ptexc \let\i=\ptexi \let\t=\ptext \let\l=\ptexl
\let\L=\ptexL
%
\let\Etex=\endgroup}

% Define @lisp ... @endlisp.
% @lisp does a \begingroup so it can rebind things,
% including the definition of @endlisp (which normally is erroneous).

% Amount to narrow the margins by for @lisp.
\newskip\lispnarrowing \lispnarrowing=0.4in

% This is the definition that ^^M gets inside @lisp, @example, and other
% such environments.  \null is better than a space, since it doesn't
% have any width.
\def\lisppar{\null\endgraf}

% Make each space character in the input produce a normal interword
% space in the output.  Don't allow a line break at this space, as this
% is used only in environments like @example, where each line of input
% should produce a line of output anyway.
%
{\obeyspaces %
\gdef\sepspaces{\obeyspaces\let =\tie}}

% Define \obeyedspace to be our active space, whatever it is.  This is
% for use in \parsearg.
{\sepspaces %
\global\let\obeyedspace= }

% This space is always present above and below environments.
\newskip\envskipamount \envskipamount = 0pt

% Make spacing and below environment symmetrical.  We use \parskip here
% to help in doing that, since in @example-like environments \parskip
% is reset to zero; thus the \afterenvbreak inserts no space -- but the
% start of the next paragraph will insert \parskip
%
\def\aboveenvbreak{{\advance\envskipamount by \parskip
\endgraf \ifdim\lastskip<\envskipamount
\removelastskip \penalty-50 \vskip\envskipamount \fi}}

\let\afterenvbreak = \aboveenvbreak

% \nonarrowing is a flag.  If "set", @lisp etc don't narrow margins.
\let\nonarrowing=\relax

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \cartouche: draw rectangle w/rounded corners around argument
\font\circle=lcircle10
\newdimen\circthick
\newdimen\cartouter\newdimen\cartinner
\newskip\normbskip\newskip\normpskip\newskip\normlskip
\circthick=\fontdimen8\circle
%
\def\ctl{{\circle\char'013\hskip -6pt}}% 6pt from pl file: 1/2charwidth
\def\ctr{{\hskip 6pt\circle\char'010}}
\def\cbl{{\circle\char'012\hskip -6pt}}
\def\cbr{{\hskip 6pt\circle\char'011}}
\def\carttop{\hbox to \cartouter{\hskip\lskip
	\ctl\leaders\hrule height\circthick\hfil\ctr
	\hskip\rskip}}
\def\cartbot{\hbox to \cartouter{\hskip\lskip
	\cbl\leaders\hrule height\circthick\hfil\cbr
	\hskip\rskip}}
%
\newskip\lskip\newskip\rskip

\long\def\cartouche{%
\begingroup
	\lskip=\leftskip \rskip=\rightskip
	\leftskip=0pt\rightskip=0pt %we want these *outside*.
	\cartinner=\hsize \advance\cartinner by-\lskip
		 	  \advance\cartinner by-\rskip
	\cartouter=\hsize
	\advance\cartouter by 18pt % allow for 3pt kerns on either
%				     side, and for 6pt waste from
%				     each corner char
	\normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
	% Flag to tell @lisp, etc., not to narrow margin.
	\let\nonarrowing=\comment
	\vbox\bgroup
		\baselineskip=0pt\parskip=0pt\lineskip=0pt
		\carttop
		\hbox\bgroup
			\hskip\lskip
			\vrule\kern3pt
			\vbox\bgroup
				\hsize=\cartinner
				\kern3pt
				\begingroup
					\baselineskip=\normbskip
					\lineskip=\normlskip
					\parskip=\normpskip
					\vskip -\parskip
\def\Ecartouche{%
				\endgroup
				\kern3pt
			\egroup
			\kern3pt\vrule
			\hskip\rskip
		\egroup
		\cartbot
	\egroup
\endgroup
}}


% This macro is called at the beginning of all the @example variants,
% inside a group.
\def\nonfillstart{%
  \aboveenvbreak
  \inENV % This group ends at the end of the body
  \hfuzz = 12pt % Don't be fussy
  \sepspaces % Make spaces be word-separators rather than space tokens.
  \singlespace
  \let\par = \lisppar % don't ignore blank lines
  \obeylines % each line of input is a line of output
  \parskip = 0pt
  \parindent = 0pt
  \emergencystretch = 0pt % don't try to avoid overfull boxes
  % @cartouche defines \nonarrowing to inhibit narrowing
  % at next level down.
  \ifx\nonarrowing\relax
    \advance \leftskip by \lispnarrowing
    \exdentamount=\lispnarrowing
    \let\exdent=\nofillexdent
    \let\nonarrowing=\relax
  \fi
}

% To ending an @example-like environment, we first end the paragraph
% (via \afterenvbreak's vertical glue), and then the group.  That way we
% keep the zero \parskip that the environments set -- \parskip glue
% will be inserted at the beginning of the next paragraph in the
% document, after the environment.
%
\def\nonfillfinish{\afterenvbreak\endgroup}%

% This macro is
\def\lisp{\begingroup
  \nonfillstart
  \let\Elisp = \nonfillfinish
  \tt
  \rawbackslash % have \ input char produce \ char from current font
  \gobble
}

% Define the \E... control sequence only if we are inside the
% environment, so the error checking in \end will work.
%
% We must call \lisp last in the definition, since it reads the
% return following the @example (or whatever) command.
%
\def\example{\begingroup \def\Eexample{\nonfillfinish\endgroup}\lisp}
\def\smallexample{\begingroup \def\Esmallexample{\nonfillfinish\endgroup}\lisp}
\def\smalllisp{\begingroup \def\Esmalllisp{\nonfillfinish\endgroup}\lisp}

% @smallexample and @smalllisp.  This is not used unless the @smallbook
% command is given.  Originally contributed by Pavel@xerox.
%
\def\smalllispx{\begingroup
  \nonfillstart
  \let\Esmalllisp = \nonfillfinish
  \let\Esmallexample = \nonfillfinish
  %
  % Smaller interline space and fonts for small examples.
  \baselineskip 10pt
  \indexfonts \tt
  \rawbackslash % output the \ character from the current font
  \gobble
}

% This is @display; same as @lisp except use roman font.
%
\def\display{\begingroup
  \nonfillstart
  \let\Edisplay = \nonfillfinish
  \gobble
}

% This is @format; same as @display except don't narrow margins.
%
\def\format{\begingroup
  \let\nonarrowing = t
  \nonfillstart
  \let\Eformat = \nonfillfinish
  \gobble
}

% @flushleft (same as @format) and @flushright.
%
\def\flushleft{\begingroup
  \let\nonarrowing = t
  \nonfillstart
  \let\Eflushleft = \nonfillfinish
  \gobble
}
\def\flushright{\begingroup
  \let\nonarrowing = t
  \nonfillstart
  \let\Eflushright = \nonfillfinish
  \advance\leftskip by 0pt plus 1fill
  \gobble}

% @quotation does normal linebreaking and narrows the margins.
%
\def\quotation{%
\begingroup\inENV %This group ends at the end of the @quotation body
{\parskip=0pt  % because we will skip by \parskip too, later
\aboveenvbreak}%
\singlespace
\parindent=0pt
\let\Equotation = \nonfillfinish
% @cartouche defines \nonarrowing to inhibit narrowing
% at next level down.
\ifx\nonarrowing\relax
\advance \leftskip by \lispnarrowing
\advance \rightskip by \lispnarrowing
\exdentamount=\lispnarrowing
\let\nonarrowing=\relax
\fi}

\message{defuns,}
% Define formatter for defuns
% First, allow user to change definition object font (\df) internally
\def\setdeffont #1 {\csname DEF#1\endcsname}

\newskip\defbodyindent \defbodyindent=.4in
\newskip\defargsindent \defargsindent=50pt
\newskip\deftypemargin \deftypemargin=12pt
\newskip\deflastargmargin \deflastargmargin=18pt

\newcount\parencount
% define \functionparens, which makes ( and ) and & do special things.
% \functionparens affects the group it is contained in.
\def\activeparens{%
\catcode`\(=\active \catcode`\)=\active \catcode`\&=\active
\catcode`\[=\active \catcode`\]=\active}

% Make control sequences which act like normal parenthesis chars.
\let\lparen = ( \let\rparen = )

{\activeparens % Now, smart parens don't turn on until &foo (see \amprm)

% Be sure that we always have a definition for `(', etc.  For example,
% if the fn name has parens in it, \boldbrax will not be in effect yet,
% so TeX would otherwise complain about undefined control sequence.
\global\let(=\lparen \global\let)=\rparen
\global\let[=\lbrack \global\let]=\rbrack

\gdef\functionparens{\boldbrax\let&=\amprm\parencount=0 }
\gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}

% Definitions of (, ) and & used in args for functions.
% This is the definition of ( outside of all parentheses.
\gdef\oprm#1 {{\rm\char`\(}#1 \bf \let(=\opnested %
\global\advance\parencount by 1 }
%
% This is the definition of ( when already inside a level of parens.
\gdef\opnested{\char`\(\global\advance\parencount by 1 }
%
\gdef\clrm{% Print a paren in roman if it is taking us back to depth of 0.
% also in that case restore the outer-level definition of (.
\ifnum \parencount=1 {\rm \char `\)}\sl \let(=\oprm \else \char `\) \fi
\global\advance \parencount by -1 }
% If we encounter &foo, then turn on ()-hacking afterwards
\gdef\amprm#1 {{\rm\&#1}\let(=\oprm \let)=\clrm\ }
%
\gdef\normalparens{\boldbrax\let&=\ampnr}
} % End of definition inside \activeparens
%% These parens (in \boldbrax) actually are a little bolder than the
%% contained text.  This is especially needed for [ and ]
\def\opnr{{\sf\char`\(}} \def\clnr{{\sf\char`\)}} \def\ampnr{\&}
\def\lbrb{{\bf\char`\[}} \def\rbrb{{\bf\char`\]}}

% First, defname, which formats the header line itself.
% #1 should be the function name.
% #2 should be the type of definition, such as "Function".

\def\defname #1#2{%
% Get the values of \leftskip and \rightskip as they were
% outside the @def...
\dimen2=\leftskip
\advance\dimen2 by -\defbodyindent
\dimen3=\rightskip
\advance\dimen3 by -\defbodyindent
\noindent        %
\setbox0=\hbox{\hskip \deflastargmargin{\rm #2}\hskip \deftypemargin}%
\dimen0=\hsize \advance \dimen0 by -\wd0 % compute size for first line
\dimen1=\hsize \advance \dimen1 by -\defargsindent %size for continuations
\parshape 2 0in \dimen0 \defargsindent \dimen1     %
% Now output arg 2 ("Function" or some such)
% ending at \deftypemargin from the right margin,
% but stuck inside a box of width 0 so it does not interfere with linebreaking
{% Adjust \hsize to exclude the ambient margins,
% so that \rightline will obey them.
\advance \hsize by -\dimen2 \advance \hsize by -\dimen3
\rlap{\rightline{{\rm #2}\hskip \deftypemargin}}}%
% Make all lines underfull and no complaints:
\tolerance=10000 \hbadness=10000
\advance\leftskip by -\defbodyindent
\exdentamount=\defbodyindent
{\df #1}\enskip        % Generate function name
}

% Actually process the body of a definition
% #1 should be the terminating control sequence, such as \Edefun.
% #2 should be the "another name" control sequence, such as \defunx.
% #3 should be the control sequence that actually processes the header,
%    such as \defunheader.

\def\defparsebody #1#2#3{\begingroup\inENV% Environment for definitionbody
\medbreak %
% Define the end token that this defining construct specifies
% so that it will exit this group.
\def#1{\endgraf\endgroup\medbreak}%
\def#2{\begingroup\obeylines\activeparens\spacesplit#3}%
\parindent=0in
\advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
\exdentamount=\defbodyindent
\begingroup %
\catcode 61=\active % 61 is `='
\obeylines\activeparens\spacesplit#3}

\def\defmethparsebody #1#2#3#4 {\begingroup\inENV %
\medbreak %
% Define the end token that this defining construct specifies
% so that it will exit this group.
\def#1{\endgraf\endgroup\medbreak}%
\def#2##1 {\begingroup\obeylines\activeparens\spacesplit{#3{##1}}}%
\parindent=0in
\advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
\exdentamount=\defbodyindent
\begingroup\obeylines\activeparens\spacesplit{#3{#4}}}

\def\defopparsebody #1#2#3#4#5 {\begingroup\inENV %
\medbreak %
% Define the end token that this defining construct specifies
% so that it will exit this group.
\def#1{\endgraf\endgroup\medbreak}%
\def#2##1 ##2 {\def#4{##1}%
\begingroup\obeylines\activeparens\spacesplit{#3{##2}}}%
\parindent=0in
\advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
\exdentamount=\defbodyindent
\begingroup\obeylines\activeparens\spacesplit{#3{#5}}}

% These parsing functions are similar to the preceding ones
% except that they do not make parens into active characters.
% These are used for "variables" since they have no arguments.

\def\defvarparsebody #1#2#3{\begingroup\inENV% Environment for definitionbody
\medbreak %
% Define the end token that this defining construct specifies
% so that it will exit this group.
\def#1{\endgraf\endgroup\medbreak}%
\def#2{\begingroup\obeylines\spacesplit#3}%
\parindent=0in
\advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
\exdentamount=\defbodyindent
\begingroup %
\catcode 61=\active %
\obeylines\spacesplit#3}

% This is used for \def{tp,vr}parsebody.  It could probably be used for
% some of the others, too, with some judicious conditionals.
% 
\def\parsebodycommon#1#2#3{%
  \begingroup\inENV %
  \medbreak %
  % Define the end token that this defining construct specifies
  % so that it will exit this group.
  \def#1{\endgraf\endgroup\medbreak}%
  \def#2##1 {\begingroup\obeylines\spacesplit{#3{##1}}}%
  \parindent=0in
  \advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
  \exdentamount=\defbodyindent
  \begingroup\obeylines
}

\def\defvrparsebody#1#2#3#4 {%
  \parsebodycommon{#1}{#2}{#3}%
  \spacesplit{#3{#4}}%
}

% This loses on `@deftp {Data Type} {struct termios}' -- it thinks the
% type is just `struct', because we lose the braces in `{struct
% termios}' when \spacesplit reads its undelimited argument.  Sigh.
% \let\deftpparsebody=\defvrparsebody
%
% So, to get around this, we put \empty in with the type name.  That
% way, TeX won't find exactly `{...}' as an undelimited argument, and
% won't strip off the braces.
%
\def\deftpparsebody #1#2#3#4 {%
  \parsebodycommon{#1}{#2}{#3}%
  \spacesplit{\parsetpheaderline{#3{#4}}}\empty
}

% Fine, but then we have to eventually remove the \empty *and* the
% braces (if any).  That's what this does, putting the result in \tptemp.
% 
\def\removeemptybraces\empty#1\relax{\def\tptemp{#1}}%

% After \spacesplit has done its work, this is called -- #1 is the final
% thing to call, #2 the type name (which starts with \empty), and #3
% (which might be empty) the arguments.
% 
\def\parsetpheaderline#1#2#3{%
  \removeemptybraces#2\relax
  #1{\tptemp}{#3}%
}%

\def\defopvarparsebody #1#2#3#4#5 {\begingroup\inENV %
\medbreak %
% Define the end token that this defining construct specifies
% so that it will exit this group.
\def#1{\endgraf\endgroup\medbreak}%
\def#2##1 ##2 {\def#4{##1}%
\begingroup\obeylines\spacesplit{#3{##2}}}%
\parindent=0in
\advance\leftskip by \defbodyindent \advance \rightskip by \defbodyindent
\exdentamount=\defbodyindent
\begingroup\obeylines\spacesplit{#3{#5}}}

% Split up #2 at the first space token.
% call #1 with two arguments:
%  the first is all of #2 before the space token,
%  the second is all of #2 after that space token.
% If #2 contains no space token, all of it is passed as the first arg
% and the second is passed as empty.

{\obeylines
\gdef\spacesplit#1#2^^M{\endgroup\spacesplitfoo{#1}#2 \relax\spacesplitfoo}%
\long\gdef\spacesplitfoo#1#2 #3#4\spacesplitfoo{%
\ifx\relax #3%
#1{#2}{}\else #1{#2}{#3#4}\fi}}

% So much for the things common to all kinds of definitions.

% Define @defun.

% First, define the processing that is wanted for arguments of \defun
% Use this to expand the args and terminate the paragraph they make up

\def\defunargs #1{\functionparens \sl
% Expand, preventing hyphenation at `-' chars.
% Note that groups don't affect changes in \hyphenchar.
\hyphenchar\tensl=0
#1%
\hyphenchar\tensl=45
\ifnum\parencount=0 \else \errmessage{unbalanced parens in @def arguments}\fi%
\interlinepenalty=10000
\advance\rightskip by 0pt plus 1fil
\endgraf\penalty 10000\vskip -\parskip\penalty 10000%
}

\def\deftypefunargs #1{%
% Expand, preventing hyphenation at `-' chars.
% Note that groups don't affect changes in \hyphenchar.
\functionparens
\code{#1}%
\interlinepenalty=10000
\advance\rightskip by 0pt plus 1fil
\endgraf\penalty 10000\vskip -\parskip\penalty 10000%
}

% Do complete processing of one @defun or @defunx line already parsed.

% @deffn Command forward-char nchars

\def\deffn{\defmethparsebody\Edeffn\deffnx\deffnheader}

\def\deffnheader #1#2#3{\doind {fn}{\code{#2}}%
\begingroup\defname {#2}{#1}\defunargs{#3}\endgroup %
\catcode 61=\other % Turn off change made in \defparsebody
}

% @defun == @deffn Function

\def\defun{\defparsebody\Edefun\defunx\defunheader}

\def\defunheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
\begingroup\defname {#1}{Function}%
\defunargs {#2}\endgroup %
\catcode 61=\other % Turn off change made in \defparsebody
}

% @deftypefun int foobar (int @var{foo}, float @var{bar})

\def\deftypefun{\defparsebody\Edeftypefun\deftypefunx\deftypefunheader}

% #1 is the data type.  #2 is the name and args.
\def\deftypefunheader #1#2{\deftypefunheaderx{#1}#2 \relax}
% #1 is the data type, #2 the name, #3 the args.
\def\deftypefunheaderx #1#2 #3\relax{%
\doind {fn}{\code{#2}}% Make entry in function index
\begingroup\defname {\code{#1} #2}{Function}%
\deftypefunargs {#3}\endgroup %
\catcode 61=\other % Turn off change made in \defparsebody
}

% @deftypefn {Library Function} int foobar (int @var{foo}, float @var{bar})

\def\deftypefn{\defmethparsebody\Edeftypefn\deftypefnx\deftypefnheader}

% #1 is the classification.  #2 is the data type.  #3 is the name and args.
\def\deftypefnheader #1#2#3{\deftypefnheaderx{#1}{#2}#3 \relax}
% #1 is the classification, #2 the data type, #3 the name, #4 the args.
\def\deftypefnheaderx #1#2#3 #4\relax{%
\doind {fn}{\code{#3}}% Make entry in function index
\begingroup
\normalparens % notably, turn off `&' magic, which prevents
%               at least some C++ text from working
\defname {\code{#2} #3}{#1}%
\deftypefunargs {#4}\endgroup %
\catcode 61=\other % Turn off change made in \defparsebody
}

% @defmac == @deffn Macro

\def\defmac{\defparsebody\Edefmac\defmacx\defmacheader}

\def\defmacheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
\begingroup\defname {#1}{Macro}%
\defunargs {#2}\endgroup %
\catcode 61=\other % Turn off change made in \defparsebody
}

% @defspec == @deffn Special Form

\def\defspec{\defparsebody\Edefspec\defspecx\defspecheader}

\def\defspecheader #1#2{\doind {fn}{\code{#1}}% Make entry in function index
\begingroup\defname {#1}{Special Form}%
\defunargs {#2}\endgroup %
\catcode 61=\other % Turn off change made in \defparsebody
}

% This definition is run if you use @defunx
% anywhere other than immediately after a @defun or @defunx.

\def\deffnx #1 {\errmessage{@deffnx in invalid context}}
\def\defunx #1 {\errmessage{@defunx in invalid context}}
\def\defmacx #1 {\errmessage{@defmacx in invalid context}}
\def\defspecx #1 {\errmessage{@defspecx in invalid context}}
\def\deftypefnx #1 {\errmessage{@deftypefnx in invalid context}}
\def\deftypeunx #1 {\errmessage{@deftypeunx in invalid context}}

% @defmethod, and so on

% @defop {Funny Method} foo-class frobnicate argument

\def\defop #1 {\def\defoptype{#1}%
\defopparsebody\Edefop\defopx\defopheader\defoptype}

\def\defopheader #1#2#3{%
\dosubind {fn}{\code{#2}}{on #1}% Make entry in function index
\begingroup\defname {#2}{\defoptype{} on #1}%
\defunargs {#3}\endgroup %
}

% @defmethod == @defop Method

\def\defmethod{\defmethparsebody\Edefmethod\defmethodx\defmethodheader}

\def\defmethodheader #1#2#3{%
\dosubind {fn}{\code{#2}}{on #1}% entry in function index
\begingroup\defname {#2}{Method on #1}%
\defunargs {#3}\endgroup %
}

% @defcv {Class Option} foo-class foo-flag

\def\defcv #1 {\def\defcvtype{#1}%
\defopvarparsebody\Edefcv\defcvx\defcvarheader\defcvtype}

\def\defcvarheader #1#2#3{%
\dosubind {vr}{\code{#2}}{of #1}% Make entry in var index
\begingroup\defname {#2}{\defcvtype{} of #1}%
\defvarargs {#3}\endgroup %
}

% @defivar == @defcv {Instance Variable}

\def\defivar{\defvrparsebody\Edefivar\defivarx\defivarheader}

\def\defivarheader #1#2#3{%
\dosubind {vr}{\code{#2}}{of #1}% Make entry in var index
\begingroup\defname {#2}{Instance Variable of #1}%
\defvarargs {#3}\endgroup %
}

% These definitions are run if you use @defmethodx, etc.,
% anywhere other than immediately after a @defmethod, etc.

\def\defopx #1 {\errmessage{@defopx in invalid context}}
\def\defmethodx #1 {\errmessage{@defmethodx in invalid context}}
\def\defcvx #1 {\errmessage{@defcvx in invalid context}}
\def\defivarx #1 {\errmessage{@defivarx in invalid context}}

% Now @defvar

% First, define the processing that is wanted for arguments of @defvar.
% This is actually simple: just print them in roman.
% This must expand the args and terminate the paragraph they make up
\def\defvarargs #1{\normalparens #1%
\interlinepenalty=10000
\endgraf\penalty 10000\vskip -\parskip\penalty 10000}

% @defvr Counter foo-count

\def\defvr{\defvrparsebody\Edefvr\defvrx\defvrheader}

\def\defvrheader #1#2#3{\doind {vr}{\code{#2}}%
\begingroup\defname {#2}{#1}\defvarargs{#3}\endgroup}

% @defvar == @defvr Variable

\def\defvar{\defvarparsebody\Edefvar\defvarx\defvarheader}

\def\defvarheader #1#2{\doind {vr}{\code{#1}}% Make entry in var index
\begingroup\defname {#1}{Variable}%
\defvarargs {#2}\endgroup %
}

% @defopt == @defvr {User Option}

\def\defopt{\defvarparsebody\Edefopt\defoptx\defoptheader}

\def\defoptheader #1#2{\doind {vr}{\code{#1}}% Make entry in var index
\begingroup\defname {#1}{User Option}%
\defvarargs {#2}\endgroup %
}

% @deftypevar int foobar

\def\deftypevar{\defvarparsebody\Edeftypevar\deftypevarx\deftypevarheader}

% #1 is the data type.  #2 is the name.
\def\deftypevarheader #1#2{%
\doind {vr}{\code{#2}}% Make entry in variables index
\begingroup\defname {\code{#1} #2}{Variable}%
\interlinepenalty=10000
\endgraf\penalty 10000\vskip -\parskip\penalty 10000
\endgroup}

% @deftypevr {Global Flag} int enable

\def\deftypevr{\defvrparsebody\Edeftypevr\deftypevrx\deftypevrheader}

\def\deftypevrheader #1#2#3{\doind {vr}{\code{#3}}%
\begingroup\defname {\code{#2} #3}{#1}
\interlinepenalty=10000
\endgraf\penalty 10000\vskip -\parskip\penalty 10000
\endgroup}

% This definition is run if you use @defvarx
% anywhere other than immediately after a @defvar or @defvarx.

\def\defvrx #1 {\errmessage{@defvrx in invalid context}}
\def\defvarx #1 {\errmessage{@defvarx in invalid context}}
\def\defoptx #1 {\errmessage{@defoptx in invalid context}}
\def\deftypevarx #1 {\errmessage{@deftypevarx in invalid context}}
\def\deftypevrx #1 {\errmessage{@deftypevrx in invalid context}}

% Now define @deftp
% Args are printed in bold, a slight difference from @defvar.

\def\deftpargs #1{\bf \defvarargs{#1}}

% @deftp Class window height width ...

\def\deftp{\deftpparsebody\Edeftp\deftpx\deftpheader}

\def\deftpheader #1#2#3{\doind {tp}{\code{#2}}%
\begingroup\defname {#2}{#1}\deftpargs{#3}\endgroup}

% This definition is run if you use @deftpx, etc
% anywhere other than immediately after a @deftp, etc.

\def\deftpx #1 {\errmessage{@deftpx in invalid context}}

\message{cross reference,}
% Define cross-reference macros
\newwrite \auxfile

\newif\ifhavexrefs  % True if xref values are known.
\newif\ifwarnedxrefs  % True if we warned once that they aren't known.

% \setref{foo} defines a cross-reference point named foo.

\def\setref#1{%
\dosetq{#1-title}{Ytitle}%
\dosetq{#1-pg}{Ypagenumber}%
\dosetq{#1-snt}{Ysectionnumberandtype}}

\def\unnumbsetref#1{%
\dosetq{#1-title}{Ytitle}%
\dosetq{#1-pg}{Ypagenumber}%
\dosetq{#1-snt}{Ynothing}}

\def\appendixsetref#1{%
\dosetq{#1-title}{Ytitle}%
\dosetq{#1-pg}{Ypagenumber}%
\dosetq{#1-snt}{Yappendixletterandtype}}

% \xref, \pxref, and \ref generate cross-references to specified points.
% For \xrefX, #1 is the node name, #2 the name of the Info
% cross-reference, #3 the printed node name, #4 the name of the Info
% file, #5 the name of the printed manual.  All but the node name can be
% omitted.
%
\def\pxref#1{see \xrefX[#1,,,,,,,]}
\def\xref#1{See \xrefX[#1,,,,,,,]}
\def\ref#1{\xrefX[#1,,,,,,,]}
\def\xrefX[#1,#2,#3,#4,#5,#6]{\begingroup%
\def\printedmanual{\ignorespaces #5}%
\def\printednodename{\ignorespaces #3}%
%
\setbox1=\hbox{\printedmanual}%
\setbox0=\hbox{\printednodename}%
\ifdim \wd0=0pt%
% No printed node name was explicitly given.
\ifx SETxref-automatic-section-title %
% This line should make the actual chapter or section title appear inside
% the square brackets.  Use the real section title if we have it.
\ifdim \wd1>0pt%
% It is in another manual, so we don't have it.
\def\printednodename{\ignorespaces #1} \else%
% We know the real title if we have the xref values.
\ifhavexrefs \def\printednodename{\refx{#1-title}}%
% Otherwise just copy the Info node name.
\else \def\printednodename{\ignorespaces #1} \fi%
\fi\def\printednodename{#1-title}%
\else% This line just uses the node name.
\def\printednodename{\ignorespaces #1}%
\fi% ends \ifx SETxref-automatic-section-title
\fi% ends \ifdim \wd0
%
%
% If we use \unhbox0 and \unhbox1 to print the node names, TeX does
% not insert empty discretionaries after hyphens, which means that it
% will not find a line break at a hyphen in a node names.  Since some
% manuals are best written with fairly long node names, containing
% hyphens, this is a loss.  Therefore, we simply give the text of
% the node name again, so it is as if TeX is seeing it for the first
% time.
\ifdim \wd1>0pt
section ``\printednodename'' in \cite{\printedmanual}%
\else%
\turnoffactive%
\refx{#1-snt}{} [\printednodename], page\tie\refx{#1-pg}{}%
\fi
\endgroup}

% \dosetq is the interface for calls from other macros

% Use \turnoffactive so that punctuation chars such as underscore
% work in node names.
\def\dosetq #1#2{{\let\folio=0 \turnoffactive%
\edef\next{\write\auxfile{\internalsetq {#1}{#2}}}%
\next}}

% \internalsetq {foo}{page} expands into
% CHARACTERS 'xrdef {foo}{...expansion of \Ypage...}
% When the aux file is read, ' is the escape character

\def\internalsetq #1#2{'xrdef {#1}{\csname #2\endcsname}}

% Things to be expanded by \internalsetq

\def\Ypagenumber{\folio}

\def\Ytitle{\thissection}

\def\Ynothing{}

\def\Ysectionnumberandtype{%
\ifnum\secno=0 Chapter\xreftie\the\chapno %
\else \ifnum \subsecno=0 Section\xreftie\the\chapno.\the\secno %
\else \ifnum \subsubsecno=0 %
Section\xreftie\the\chapno.\the\secno.\the\subsecno %
\else %
Section\xreftie\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno %
\fi \fi \fi }

\def\Yappendixletterandtype{%
\ifnum\secno=0 Appendix\xreftie'char\the\appendixno{}%
\else \ifnum \subsecno=0 Section\xreftie'char\the\appendixno.\the\secno %
\else \ifnum \subsubsecno=0 %
Section\xreftie'char\the\appendixno.\the\secno.\the\subsecno %
\else %
Section\xreftie'char\the\appendixno.\the\secno.\the\subsecno.\the\subsubsecno %
\fi \fi \fi }

\gdef\xreftie{'tie}

% Use TeX 3.0's \inputlineno to get the line number, for better error
% messages, but if we're using an old version of TeX, don't do anything.
%
\ifx\inputlineno\thisisundefined
  \let\linenumber = \empty % Non-3.0.
\else
  \def\linenumber{\the\inputlineno:\space}
\fi

% Define \refx{NAME}{SUFFIX} to reference a cross-reference string named NAME.
% If its value is nonempty, SUFFIX is output afterward.

\def\refx#1#2{%
  \expandafter\ifx\csname X#1\endcsname\relax
    % If not defined, say something at least.
    $\langle$un\-de\-fined$\rangle$%
    \ifhavexrefs
      \message{\linenumber Undefined cross reference `#1'.}%
    \else
      \ifwarnedxrefs\else
        \global\warnedxrefstrue
        \message{Cross reference values unknown; you must run TeX again.}%
      \fi
    \fi
  \else
    % It's defined, so just use it.
    \csname X#1\endcsname
  \fi
  #2% Output the suffix in any case.
}

% Read the last existing aux file, if any.  No error if none exists.

% This is the macro invoked by entries in the aux file.
\def\xrdef #1#2{
{\catcode`\'=\other\expandafter \gdef \csname X#1\endcsname {#2}}}

\def\readauxfile{%
\begingroup
\catcode `\^^@=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\^^C=\other
\catcode `\^^D=\other
\catcode `\^^E=\other
\catcode `\^^F=\other
\catcode `\^^G=\other
\catcode `\^^H=\other
\catcode `\=\other
\catcode `\^^L=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode `\=\other
\catcode 26=\other
\catcode `\^^[=\other
\catcode `\^^\=\other
\catcode `\^^]=\other
\catcode `\^^^=\other
\catcode `\^^_=\other
\catcode `\@=\other
\catcode `\^=\other
\catcode `\~=\other
\catcode `\[=\other
\catcode `\]=\other
\catcode`\"=\other
\catcode`\_=\other
\catcode`\|=\other
\catcode`\<=\other
\catcode`\>=\other
\catcode `\$=\other
\catcode `\#=\other
\catcode `\&=\other
% `\+ does not work, so use 43.
\catcode 43=\other
% the aux file uses ' as the escape.
% Turn off \ as an escape so we do not lose on
% entries which were dumped with control sequences in their names.
% For example, 'xrdef {$\leq $-fun}{page ...} made by @defun ^^
% Reference to such entries still does not work the way one would wish,
% but at least they do not bomb out when the aux file is read in.
\catcode `\{=1 \catcode `\}=2
\catcode `\%=\other
\catcode `\'=0
\catcode `\\=\other
\openin 1 \jobname.aux
\ifeof 1 \else \closein 1 \input \jobname.aux \global\havexrefstrue
\global\warnedobstrue
\fi
% Open the new aux file.  Tex will close it automatically at exit.
\openout \auxfile=\jobname.aux
\endgroup}


% Footnotes.

\newcount \footnoteno

% The trailing space in the following definition for supereject is
% vital for proper filling; pages come out unaligned when you do a
% pagealignmacro call if that space before the closing brace is
% removed.
\def\supereject{\par\penalty -20000\footnoteno =0 }

% @footnotestyle is meaningful for info output only..
\let\footnotestyle=\comment

\let\ptexfootnote=\footnote

{\catcode `\@=11
%
% Auto-number footnotes.  Otherwise like plain.
\gdef\footnote{%
  \global\advance\footnoteno by \@ne
  \edef\thisfootno{$^{\the\footnoteno}$}%
  %
  % In case the footnote comes at the end of a sentence, preserve the
  % extra spacing after we do the footnote number.
  \let\@sf\empty
  \ifhmode\edef\@sf{\spacefactor\the\spacefactor}\/\fi
  %
  % Remove inadvertent blank space before typesetting the footnote number.
  \unskip
  \thisfootno\@sf
  \footnotezzz
}%

% Don't bother with the trickery in plain.tex to not require the
% footnote text as a parameter.  Our footnotes don't need to be so general.
%
\long\gdef\footnotezzz#1{\insert\footins{%
  % We want to typeset this text as a normal paragraph, even if the
  % footnote reference occurs in (for example) a display environment.
  % So reset some parameters.
  \interlinepenalty\interfootnotelinepenalty
  \splittopskip\ht\strutbox % top baseline for broken footnotes
  \splitmaxdepth\dp\strutbox
  \floatingpenalty\@MM
  \leftskip\z@skip
  \rightskip\z@skip
  \spaceskip\z@skip
  \xspaceskip\z@skip
  \parindent\defaultparindent
  %
  % Hang the footnote text off the number.
  \hang
  \textindent{\thisfootno}%
  %
  % Don't crash into the line above the footnote text.  Since this
  % expands into a box, it must come within the paragraph, lest it
  % provide a place where TeX can split the footnote.
  \footstrut
  #1\strut}%
}

}%end \catcode `\@=11

% Set the baselineskip to #1, and the lineskip and strut size
% correspondingly.  There is no deep meaning behind these magic numbers
% used as factors; they just match (closely enough) what Knuth defined.
%
\def\lineskipfactor{.08333}
\def\strutheightpercent{.70833}
\def\strutdepthpercent {.29167}
%
\def\setleading#1{%
  \normalbaselineskip = #1\relax
  \normallineskip = \lineskipfactor\normalbaselineskip
  \normalbaselines
  \setbox\strutbox =\hbox{%
    \vrule width0pt height\strutheightpercent\baselineskip
                    depth \strutdepthpercent \baselineskip
  }%
}

% @| inserts a changebar to the left of the current line.  It should
% surround any changed text.  This approach does *not* work if the
% change spans more than two lines of output.  To handle that, we would
% have adopt a much more difficult approach (putting marks into the main
% vertical list for the beginning and end of each change).
%
\def\|{%
  % \vadjust can only be used in horizontal mode.
  \leavevmode
  %
  % Append this vertical mode material after the current line in the output.
  \vadjust{%
    % We want to insert a rule with the height and depth of the current
    % leading; that is exactly what \strutbox is supposed to record.
    \vskip-\baselineskip
    %
    % \vadjust-items are inserted at the left edge of the type.  So
    % the \llap here moves out into the left-hand margin.
    \llap{%
      %
      % For a thicker or thinner bar, change the `1pt'.
      \vrule height\baselineskip width1pt
      %
      % This is the space between the bar and the text.
      \hskip 12pt
    }%
  }%
}

% For a final copy, take out the rectangles
% that mark overfull boxes (in case you have decided
% that the text looks ok even though it passes the margin).
%
\def\finalout{\overfullrule=0pt}


% End of control word definitions.

\message{and turning on texinfo input format.}

\def\openindices{%
   \newindex{cp}%
   \newcodeindex{fn}%
   \newcodeindex{vr}%
   \newcodeindex{tp}%
   \newcodeindex{ky}%
   \newcodeindex{pg}%
}

% Set some numeric style parameters, for 8.5 x 11 format.

%\hsize = 6.5in
\newdimen\defaultparindent \defaultparindent = 15pt
\parindent = \defaultparindent
\parskip 18pt plus 1pt
\setleading{15pt}
\advance\topskip by 1.2cm

% Prevent underfull vbox error messages.
\vbadness=10000

% Following George Bush, just get rid of widows and orphans.
\widowpenalty=10000
\clubpenalty=10000

% Use TeX 3.0's \emergencystretch to help line breaking, but if we're
% using an old version of TeX, don't do anything.  We want the amount of
% stretch added to depend on the line length, hence the dependence on
% \hsize.  This makes it come to about 9pt for the 8.5x11 format.
%
\ifx\emergencystretch\thisisundefined
  % Allow us to assign to \emergencystretch anyway.
  \def\emergencystretch{\dimen0}%
\else
  \emergencystretch = \hsize
  \divide\emergencystretch by 45
\fi

% Use @smallbook to reset parameters for 7x9.5 format  (or else 7x9.25)
\def\smallbook{

% These values for secheadingskip and subsecheadingskip are
% experiments.  RJC 7 Aug 1992
\global\secheadingskip = 17pt plus 6pt minus 3pt
\global\subsecheadingskip = 14pt plus 6pt minus 3pt

\global\lispnarrowing = 0.3in
\setleading{12pt}
\advance\topskip by -1cm
\global\parskip 3pt plus 1pt
\global\hsize = 5in
\global\vsize=7.5in
\global\tolerance=700
\global\hfuzz=1pt
\global\contentsrightmargin=0pt

\global\pagewidth=\hsize
\global\pageheight=\vsize

\global\let\smalllisp=\smalllispx
\global\let\smallexample=\smalllispx
\global\def\Esmallexample{\Esmalllisp}
}

% Use @afourpaper to print on European A4 paper.
\def\afourpaper{
\global\tolerance=700
\global\hfuzz=1pt
\setleading{12pt}
\global\parskip 15pt plus 1pt

\global\vsize= 53\baselineskip
\advance\vsize by \topskip
%\global\hsize=   5.85in     % A4 wide 10pt
\global\hsize=  6.5in
\global\outerhsize=\hsize
\global\advance\outerhsize by 0.5in
\global\outervsize=\vsize
\global\advance\outervsize by 0.6in

\global\pagewidth=\hsize
\global\pageheight=\vsize
}

% Define macros to output various characters with catcode for normal text.
\catcode`\"=\other
\catcode`\~=\other
\catcode`\^=\other
\catcode`\_=\other
\catcode`\|=\other
\catcode`\<=\other
\catcode`\>=\other
\catcode`\+=\other
\def\normaldoublequote{"}
\def\normaltilde{~}
\def\normalcaret{^}
\def\normalunderscore{_}
\def\normalverticalbar{|}
\def\normalless{<}
\def\normalgreater{>}
\def\normalplus{+}

% This macro is used to make a character print one way in ttfont
% where it can probably just be output, and another way in other fonts,
% where something hairier probably needs to be done.
%
% #1 is what to print if we are indeed using \tt; #2 is what to print
% otherwise.  Since all the Computer Modern typewriter fonts have zero
% interword stretch (and shrink), and it is reasonable to expect all
% typewriter fonts to have this, we can check that font parameter.
%
\def\ifusingtt#1#2{\ifdim \fontdimen3\the\font=0pt #1\else #2\fi}

% Turn off all special characters except @
% (and those which the user can use as if they were ordinary).
% Most of these we simply print from the \tt font, but for some, we can
% use math or other variants that look better in normal text.

\catcode`\"=\active
\def\activedoublequote{{\tt \char '042}}
\let"=\activedoublequote
\catcode`\~=\active
\def~{{\tt \char '176}}
\chardef\hat=`\^
\catcode`\^=\active
\def^{{\tt \hat}}

\catcode`\_=\active
\def_{\ifusingtt\normalunderscore\_}
% Subroutine for the previous macro.
\def\_{\lvvmode \kern.06em \vbox{\hrule width.3em height.1ex}}

% \lvvmode is equivalent in function to \leavevmode.
% Using \leavevmode runs into trouble when written out to
% an index file due to the expansion of \leavevmode into ``\unhbox
% \voidb@x'' ---which looks to TeX like ``\unhbox \voidb\x'' due to our
% magic tricks with @.
\def\lvvmode{\vbox to 0pt{}}

\catcode`\|=\active
\def|{{\tt \char '174}}
\chardef \less=`\<
\catcode`\<=\active
\def<{{\tt \less}}
\chardef \gtr=`\>
\catcode`\>=\active
\def>{{\tt \gtr}}
\catcode`\+=\active
\def+{{\tt \char 43}}
%\catcode 27=\active
%\def^^[{$\diamondsuit$}

% Used sometimes to turn off (effectively) the active characters
% even after parsing them.
\def\turnoffactive{\let"=\normaldoublequote
\let~=\normaltilde
\let^=\normalcaret
\let_=\normalunderscore
\let|=\normalverticalbar
\let<=\normalless
\let>=\normalgreater
\let+=\normalplus}

% Set up an active definition for =, but don't enable it most of the time.
{\catcode`\==\active
\global\def={{\tt \char 61}}}

\catcode`\@=0

% \rawbackslashxx output one backslash character in current font
\global\chardef\rawbackslashxx=`\\
%{\catcode`\\=\other
%@gdef@rawbackslashxx{\}}

% \rawbackslash redefines \ as input to do \rawbackslashxx.
{\catcode`\\=\active
@gdef@rawbackslash{@let\=@rawbackslashxx }}

% \normalbackslash outputs one backslash in fixed width font.
\def\normalbackslash{{\tt\rawbackslashxx}}

% Say @foo, not \foo, in error messages.
\escapechar=`\@

% \catcode 17=0   % Define control-q
\catcode`\\=\active

% If a .fmt file is being used, we don't want the `\input texinfo' to show up.
% That is what \eatinput is for; after that, the `\' should revert to printing
% a backslash.
%
@gdef@eatinput input texinfo{@fixbackslash}
@global@let\ = @eatinput

% On the other hand, perhaps the file did not have a `\input texinfo'. Then
% the first `\{ in the file would cause an error. This macro tries to fix
% that, assuming it is called before the first `\' could plausibly occur.
%
@gdef@fixbackslash{@ifx\@eatinput @let\ = @normalbackslash @fi}

%% These look ok in all fonts, so just make them not special.  The @rm below
%% makes sure that the current font starts out as the newly loaded cmr10
@catcode`@$=@other @catcode`@%=@other @catcode`@&=@other @catcode`@#=@other

@textfonts
@rm

@c Local variables:
@c page-delimiter: "^\\\\message"
@c End: