File: zsh.h

package info (click to toggle)
zsh 5.3.1-4
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 16,324 kB
  • ctags: 8,554
  • sloc: ansic: 104,868; sh: 6,584; perl: 813; makefile: 774; awk: 388; sed: 16
file content (3223 lines) | stat: -rw-r--r-- 97,413 bytes parent folder | download
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
/*
 * zsh.h - standard header file
 *
 * This file is part of zsh, the Z shell.
 *
 * Copyright (c) 1992-1997 Paul Falstad
 * All rights reserved.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and to distribute modified versions of this software for any
 * purpose, provided that the above copyright notice and the following
 * two paragraphs appear in all copies of this software.
 *
 * In no event shall Paul Falstad or the Zsh Development Group be liable
 * to any party for direct, indirect, special, incidental, or consequential
 * damages arising out of the use of this software and its documentation,
 * even if Paul Falstad and the Zsh Development Group have been advised of
 * the possibility of such damage.
 *
 * Paul Falstad and the Zsh Development Group specifically disclaim any
 * warranties, including, but not limited to, the implied warranties of
 * merchantability and fitness for a particular purpose.  The software
 * provided hereunder is on an "as is" basis, and Paul Falstad and the
 * Zsh Development Group have no obligation to provide maintenance,
 * support, updates, enhancements, or modifications.
 *
 */

/* A few typical macros */
#define minimum(a,b)  ((a) < (b) ? (a) : (b))

/*
 * Our longest integer type:  will be a 64 bit either if long already is,
 * or if we found some alternative such as long long.
 */
#ifdef ZSH_64_BIT_TYPE
typedef ZSH_64_BIT_TYPE zlong;
#if defined(ZLONG_IS_LONG_LONG) && defined(LLONG_MAX)
#define ZLONG_MAX LLONG_MAX
#else
#ifdef ZLONG_IS_LONG_64
#define ZLONG_MAX LONG_MAX
#else
/* umm... */
#define  ZLONG_MAX ((zlong)9223372036854775807)
#endif
#endif
#ifdef ZSH_64_BIT_UTYPE
typedef ZSH_64_BIT_UTYPE zulong;
#else
typedef unsigned zlong zulong;
#endif
#else
typedef long zlong;
typedef unsigned long zulong;
#define ZLONG_MAX LONG_MAX
#endif

/*
 * Work out how to define large integer constants that will fit
 * in a zlong.
 */
#if defined(ZSH_64_BIT_TYPE) || defined(LONG_IS_64_BIT)
/* We have some 64-bit type */
#ifdef LONG_IS_64_BIT
/* It's long */
#define ZLONG_CONST(x)  x ## l
#else
/* It's long long */
#ifdef ZLONG_IS_LONG_LONG
#define ZLONG_CONST(x)  x ## ll
#else
/*
 * There's some 64-bit type, but we don't know what it is.
 * We'll just cast it and hope the compiler does the right thing.
 */
#define ZLONG_CONST(x) ((zlong)x)
#endif
#endif
#else
/* We're stuck with long */
#define ZLONG_CONST(x) (x ## l)
#endif

/*
 * Double float support requires 64-bit alignment, so if longs and
 * pointers are less we need to pad out.
 */
#ifndef LONG_IS_64_BIT
# define PAD_64_BIT 1
#endif

/* math.c */
typedef struct {
    union {
	zlong l;
	double d;
    } u;
    int type;
} mnumber;

#define MN_INTEGER 1		/* mnumber is integer */
#define MN_FLOAT   2		/* mnumber is floating point */
#define MN_UNSET   4		/* mnumber not yet retrieved */

typedef struct mathfunc *MathFunc;
typedef mnumber (*NumMathFunc)(char *, int, mnumber *, int);
typedef mnumber (*StrMathFunc)(char *, char *, int);

struct mathfunc {
    MathFunc next;
    char *name;
    int flags;			/* MFF_* flags defined below */
    NumMathFunc nfunc;
    StrMathFunc sfunc;
    char *module;
    int minargs;
    int maxargs;
    int funcid;
};

/* Math function takes a string argument */
#define MFF_STR      1
/* Math function has been loaded from library */
#define MFF_ADDED    2
/* Math function is implemented by a shell function */
#define MFF_USERFUNC 4
/* When autoloading, enable all features in module */
#define MFF_AUTOALL  8


#define NUMMATHFUNC(name, func, min, max, id) \
    { NULL, name, 0, func, NULL, NULL, min, max, id }
#define STRMATHFUNC(name, func, id) \
    { NULL, name, MFF_STR, NULL, func, NULL, 0, 0, id }

/* Character tokens are sometimes casted to (unsigned char)'s.         * 
 * Unfortunately, some compilers don't correctly cast signed to        * 
 * unsigned promotions; i.e. (int)(unsigned char)((char) -1) evaluates * 
 * to -1, instead of 255 like it should.  We circumvent the troubles   * 
 * of such shameful delinquency by casting to a larger unsigned type   * 
 * then back down to unsigned char.                                    */

#ifdef BROKEN_SIGNED_TO_UNSIGNED_CASTING
# define STOUC(X)	((unsigned char)(unsigned short)(X))
#else
# define STOUC(X)	((unsigned char)(X))
#endif

/* Meta together with the character following Meta denotes the character *
 * which is the exclusive or of 32 and the character following Meta.     *
 * This is used to represent characters which otherwise has special      *
 * meaning for zsh.  These are the characters for which the imeta() test *
 * is true: the null character, and the characters from Meta to Marker.  */

#define Meta		((char) 0x83)

/* Note that the fourth character in DEFAULT_IFS is Meta *
 * followed by a space which denotes the null character. */

#define DEFAULT_IFS	" \t\n\203 "

/* As specified in the standard (POSIX 2008) */

#define DEFAULT_IFS_SH	" \t\n"

/*
 * Character tokens.
 * These should match the characters in ztokens, defined in lex.c
 */
#define Pound		((char) 0x84)
#define String		((char) 0x85)
#define Hat		((char) 0x86)
#define Star		((char) 0x87)
#define Inpar		((char) 0x88)
#define Inparmath	((char) 0x89)
#define Outpar		((char) 0x8a)
#define Outparmath	((char) 0x8b)
#define Qstring	        ((char) 0x8c)
#define Equals		((char) 0x8d)
#define Bar	      	((char) 0x8e)
#define Inbrace	        ((char) 0x8f)
#define Outbrace	((char) 0x90)
#define Inbrack	        ((char) 0x91)
#define Outbrack	((char) 0x92)
#define Tick		((char) 0x93)
#define Inang		((char) 0x94)
#define Outang		((char) 0x95)
#define OutangProc	((char) 0x96)
#define Quest		((char) 0x97)
#define Tilde		((char) 0x98)
#define Qtick		((char) 0x99)
#define Comma		((char) 0x9a)
#define Dash            ((char) 0x9b) /* Only in patterns */
#define Bang            ((char) 0x9c) /* Only in patterns */
/*
 * Marks the last of the group above.
 * Remaining tokens are even more special.
 */
#define LAST_NORMAL_TOK Bang
/*
 * Null arguments: placeholders for single and double quotes
 * and backslashes.
 */
#define Snull		((char) 0x9d)
#define Dnull		((char) 0x9e)
#define Bnull		((char) 0x9f)
/*
 * Backslash which will be returned to "\" instead of being stripped
 * when we turn the string into a printable format.
 */
#define Bnullkeep       ((char) 0xa0)
/*
 * Null argument that does not correspond to any character.
 * This should be last as it does not appear in ztokens and
 * is used to initialise the IMETA type in inittyptab().
 */
#define Nularg		((char) 0xa1)

/*
 * Take care to update the use of IMETA appropriately when adding
 * tokens here.
 */
/*
 * Marker used in paramsubst for rc_expand_param.
 * Also used in pattern character arrays as guaranteed not to
 * mark a character in a string.
 */
#define Marker		((char) 0xa2)

/* chars that need to be quoted if meant literally */

#define SPECCHARS "#$^*()=|{}[]`<>?~;&\n\t \\\'\""

/* chars that need to be quoted for pattern matching */

#define PATCHARS "#^*()|[]<>?~\\"

/*
 * Types of quote.  This is used in various places, so care needs
 * to be taken when changing them.  (Oooh, don't you look surprised.)
 * - Passed to quotestring() to indicate style.  This is the ultimate
 *   destiny of most of the other uses of members of the enum.
 * - In paramsubst(), to count q's in parameter substitution.
 * - In the completion code, where we maintain a stack of quotation types.
 */
enum {
    /*
     * No quote.  Not a valid quote, but useful in the substitution
     * and completion code to indicate we're not doing any quoting.
     */
    QT_NONE,
    /* Backslash: \ */
    QT_BACKSLASH,
    /* Single quote: ' */
    QT_SINGLE,
    /* Double quote: " */
    QT_DOUBLE,
    /* Print-style quote: $' */
    QT_DOLLARS,
    /*
     * Backtick: `
     * Not understood by many parts of the code; here for a convenience
     * in those cases where we need to represent a complete set.
     */
    QT_BACKTICK,
    /*
     * Single quotes, but the default is not to quote unless necessary.
     * This is only useful as an argument to quotestring().
     */
    QT_SINGLE_OPTIONAL,
    /*
     * Only quote pattern characters.
     * ${(b)foo} guarantees that ${~foo} matches the string
     * contained in foo.
     */
    QT_BACKSLASH_PATTERN,
    /*
     * As QT_BACKSLASH, but a NULL string is shown as ''.
     */
    QT_BACKSLASH_SHOWNULL,
    /*
     * Quoting as produced by quotedzputs(), used for human
     * readability of parameter values.
     */
    QT_QUOTEDZPUTS
};

#define QT_IS_SINGLE(x)	((x) == QT_SINGLE || (x) == QT_SINGLE_OPTIONAL)

/*
 * Lexical tokens: unlike the character tokens above, these never
 * appear in strings and don't necessarily represent a single character.
 */

enum lextok {
    NULLTOK,		/* 0  */
    SEPER,
    NEWLIN,
    SEMI,
    DSEMI,
    AMPER,		/* 5  */
    INPAR,
    OUTPAR,
    DBAR,
    DAMPER,
    OUTANG,		/* 10 */
    OUTANGBANG,
    DOUTANG,
    DOUTANGBANG,
    INANG,
    INOUTANG,		/* 15 */
    DINANG,
    DINANGDASH,
    INANGAMP,
    OUTANGAMP,
    AMPOUTANG,		/* 20 */
    OUTANGAMPBANG,
    DOUTANGAMP,
    DOUTANGAMPBANG,
    TRINANG,
    BAR,		/* 25 */
    BARAMP,
    INOUTPAR,
    DINPAR,
    DOUTPAR,
    AMPERBANG,		/* 30 */
    SEMIAMP,
    SEMIBAR,
    DOUTBRACK,
    STRING,
    ENVSTRING,		/* 35 */
    ENVARRAY,
    ENDINPUT,
    LEXERR,

    /* Tokens for reserved words */
    BANG,	/* !         */
    DINBRACK,	/* [[        */	/* 40 */
    INBRACE,    /* {         */
    OUTBRACE,   /* }         */
    CASE,	/* case      */
    COPROC,	/* coproc    */
    DOLOOP,	/* do        */ /* 45 */
    DONE,	/* done      */
    ELIF,	/* elif      */
    ELSE,	/* else      */
    ZEND,	/* end       */
    ESAC,	/* esac      */ /* 50 */
    FI,		/* fi        */
    FOR,	/* for       */
    FOREACH,	/* foreach   */
    FUNC,	/* function  */
    IF,		/* if        */ /* 55 */
    NOCORRECT,	/* nocorrect */
    REPEAT,	/* repeat    */
    SELECT,	/* select    */
    THEN,	/* then      */
    TIME,	/* time      */ /* 60 */
    UNTIL,	/* until     */
    WHILE,	/* while     */
    TYPESET     /* typeset or similar */
};

/* Redirection types.  If you modify this, you may also have to modify *
 * redirtab in parse.c and getredirs() in text.c and the IS_* macros   *
 * below.                                                              */

enum {
    REDIR_WRITE,		/* > */
    REDIR_WRITENOW,		/* >| */
    REDIR_APP,		/* >> */
    REDIR_APPNOW,		/* >>| */
    REDIR_ERRWRITE,		/* &>, >& */
    REDIR_ERRWRITENOW,	/* >&| */
    REDIR_ERRAPP,		/* >>& */
    REDIR_ERRAPPNOW,		/* >>&| */
    REDIR_READWRITE,		/* <> */
    REDIR_READ,		/* < */
    REDIR_HEREDOC,		/* << */
    REDIR_HEREDOCDASH,	/* <<- */
    REDIR_HERESTR,		/* <<< */
    REDIR_MERGEIN,		/* <&n */
    REDIR_MERGEOUT,		/* >&n */
    REDIR_CLOSE,		/* >&-, <&- */
    REDIR_INPIPE,		/* < <(...) */
    REDIR_OUTPIPE		/* > >(...) */
};
#define REDIR_TYPE_MASK	(0x1f)
/* Redir using {var} syntax */
#define REDIR_VARID_MASK (0x20)
/* Mark here-string that came from a here-document */
#define REDIR_FROM_HEREDOC_MASK (0x40)

#define IS_WRITE_FILE(X)      ((X)>=REDIR_WRITE && (X)<=REDIR_READWRITE)
#define IS_APPEND_REDIR(X)    (IS_WRITE_FILE(X) && ((X) & 2))
#define IS_CLOBBER_REDIR(X)   (IS_WRITE_FILE(X) && ((X) & 1))
#define IS_ERROR_REDIR(X)     ((X)>=REDIR_ERRWRITE && (X)<=REDIR_ERRAPPNOW)
#define IS_READFD(X)          (((X)>=REDIR_READWRITE && (X)<=REDIR_MERGEIN) || (X)==REDIR_INPIPE)
#define IS_REDIROP(X)         ((X)>=OUTANG && (X)<=TRINANG)

/*
 * Values for the fdtable array.  They say under what circumstances
 * the fd will be close.  The fdtable is an unsigned char, so these are
 * #define's rather than an enum.
 */
/* Entry not used. */
#define FDT_UNUSED		0
/*
 * Entry used internally by the shell, should not be visible to other
 * processes.
 */
#define FDT_INTERNAL		1
/*
 * Entry visible to other processes, for example created using
 * the {varid}> file syntax.
 */
#define FDT_EXTERNAL		2
/*
 * Entry visible to other processes but controlled by a module.
 * The difference from FDT_EXTERNAL is that closing this using
 * standard fd syntax will fail as there is some tidying up that
 * needs to be done by the module's own mechanism.
 */
#define FDT_MODULE		3
/*
 * Entry used by output from the XTRACE option.
 */
#define FDT_XTRACE		4
/*
 * Entry used for file locking.
 */
#define FDT_FLOCK		5
/*
 * As above, but the fd is not marked for closing on exec,
 * so the shell can still exec the last process.
 */
#define FDT_FLOCK_EXEC		6
#ifdef PATH_DEV_FD
/*
 * Entry used by a process substition.
 * This marker is not tested internally as we associated the file
 * descriptor with a job for closing.
 */
#define FDT_PROC_SUBST		7
#endif

/* Flags for input stack */
#define INP_FREE      (1<<0)	/* current buffer can be free'd            */
#define INP_ALIAS     (1<<1)	/* expanding alias or history              */
#define INP_HIST      (1<<2)	/* expanding history                       */
#define INP_CONT      (1<<3)	/* continue onto previously stacked input  */
#define INP_ALCONT    (1<<4)	/* stack is continued from alias expn.     */
#define INP_HISTCONT  (1<<5)	/* stack is continued from history expn.   */
#define INP_LINENO    (1<<6)    /* update line number                      */
#define INP_APPEND    (1<<7)    /* Append new lines to allow backup        */
#define INP_RAW_KEEP  (1<<8)    /* Input needed in raw mode even if alias  */

/* Flags for metafy */
#define META_REALLOC	0
#define META_USEHEAP	1
#define META_STATIC	2
#define META_DUP	3
#define META_ALLOC	4
#define META_NOALLOC	5
#define META_HEAPDUP	6
#define META_HREALLOC	7

/* Context to save and restore (bit fields) */
enum {
    /* History mechanism */
    ZCONTEXT_HIST       = (1<<0),
    /* Lexical analyser */
    ZCONTEXT_LEX        = (1<<1),
    /* Parser */
    ZCONTEXT_PARSE      = (1<<2)
};

/**************************/
/* Abstract types for zsh */
/**************************/

typedef struct alias     *Alias;
typedef struct asgment   *Asgment;
typedef struct builtin   *Builtin;
typedef struct cmdnam    *Cmdnam;
typedef struct complist  *Complist;
typedef struct conddef   *Conddef;
typedef struct dirsav    *Dirsav;
typedef struct emulation_options *Emulation_options;
typedef struct execcmd_params *Execcmd_params;
typedef struct features  *Features;
typedef struct feature_enables  *Feature_enables;
typedef struct funcstack *Funcstack;
typedef struct funcwrap  *FuncWrap;
typedef struct hashnode  *HashNode;
typedef struct hashtable *HashTable;
typedef struct heap      *Heap;
typedef struct heapstack *Heapstack;
typedef struct histent   *Histent;
typedef struct hookdef   *Hookdef;
typedef struct imatchdata *Imatchdata;
typedef struct jobfile   *Jobfile;
typedef struct job       *Job;
typedef struct linkedmod *Linkedmod;
typedef struct linknode  *LinkNode;
typedef union  linkroot  *LinkList;
typedef struct module    *Module;
typedef struct nameddir  *Nameddir;
typedef struct options	 *Options;
typedef struct optname   *Optname;
typedef struct param     *Param;
typedef struct paramdef  *Paramdef;
typedef struct patstralloc  *Patstralloc;
typedef struct patprog   *Patprog;
typedef struct prepromptfn *Prepromptfn;
typedef struct process   *Process;
typedef struct redir     *Redir;
typedef struct reswd     *Reswd;
typedef struct shfunc    *Shfunc;
typedef struct timedfn   *Timedfn;
typedef struct value     *Value;

/********************************/
/* Definitions for linked lists */
/********************************/

/* linked list abstract data type */

struct linknode {
    LinkNode next;
    LinkNode prev;
    void *dat;
};

struct linklist {
    LinkNode first;
    LinkNode last;
    int flags;
};

union linkroot {
    struct linklist list;
    struct linknode node;
};

/* Macros for manipulating link lists */

#define firstnode(X)        ((X)->list.first)
#define lastnode(X)         ((X)->list.last)
#define peekfirst(X)        (firstnode(X)->dat)
#define peeklast(X)         (lastnode(X)->dat)
#define addlinknode(X,Y)    insertlinknode(X,lastnode(X),Y)
#define zaddlinknode(X,Y)   zinsertlinknode(X,lastnode(X),Y)
#define uaddlinknode(X,Y)   uinsertlinknode(X,lastnode(X),Y)
#define empty(X)            (firstnode(X) == NULL)
#define nonempty(X)         (firstnode(X) != NULL)
#define getaddrdata(X)      (&((X)->dat))
#define getdata(X)          ((X)->dat)
#define setdata(X,Y)        ((X)->dat = (Y))
#define nextnode(X)         ((X)->next)
#define prevnode(X)         ((X)->prev)
#define pushnode(X,Y)       insertlinknode(X,&(X)->node,Y)
#define zpushnode(X,Y)      zinsertlinknode(X,&(X)->node,Y)
#define incnode(X)          (X = nextnode(X))
#define decnode(X)          (X = prevnode(X))
#define firsthist()         (hist_ring? hist_ring->down->histnum : curhist)
#define setsizednode(X,Y,Z) (firstnode(X)[(Y)].dat = (void *) (Z))

/* stack allocated linked lists */

#define local_list0(N) union linkroot N
#define init_list0(N) \
    do { \
        (N).list.first = NULL; \
        (N).list.last = &(N).node; \
        (N).list.flags = 0; \
    } while (0)
#define local_list1(N) union linkroot N; struct linknode __n0
#define init_list1(N,V0) \
    do { \
        (N).list.first = &__n0; \
        (N).list.last = &__n0; \
        (N).list.flags = 0; \
        __n0.next = NULL; \
        __n0.prev = &(N).node; \
        __n0.dat = (void *) (V0); \
    } while (0)

/*************************************/
/* Specific elements of linked lists */
/*************************************/

typedef void (*voidvoidfnptr_t) _((void));

/*
 * Element of the prepromptfns list.
 */
struct prepromptfn {
    voidvoidfnptr_t func;
};


/*
 * Element of the timedfns list.
 */
struct timedfn {
    voidvoidfnptr_t func;
    time_t when;
};

/********************************/
/* Definitions for syntax trees */
/********************************/

/* These are control flags that are passed *
 * down the execution pipeline.            */
#define Z_TIMED	 (1<<0)	/* pipeline is being timed                   */
#define Z_SYNC	 (1<<1)	/* run this sublist synchronously       (;)  */
#define Z_ASYNC  (1<<2)	/* run this sublist asynchronously      (&)  */
#define Z_DISOWN (1<<3)	/* run this sublist without job control (&|) */
/* (1<<4) is used for Z_END, see the wordcode definitions */
/* (1<<5) is used for Z_SIMPLE, see the wordcode definitions */

/*
 * Condition types.
 *
 * Careful when changing these: both cond_binary_ops in text.c and
 * condstr in cond.c depend on these.  (The zsh motto is "two instances
 * are better than one".  Or something.)
 */

#define COND_NOT    0
#define COND_AND    1
#define COND_OR     2
#define COND_STREQ  3
#define COND_STRDEQ 4
#define COND_STRNEQ 5
#define COND_STRLT  6
#define COND_STRGTR 7
#define COND_NT     8
#define COND_OT     9
#define COND_EF    10
#define COND_EQ    11
#define COND_NE    12
#define COND_LT    13
#define COND_GT    14
#define COND_LE    15
#define COND_GE    16
#define COND_REGEX 17
#define COND_MOD   18
#define COND_MODI  19

typedef int (*CondHandler) _((char **, int));

struct conddef {
    Conddef next;		/* next in list                       */
    char *name;			/* the condition name                 */
    int flags;			/* see CONDF_* below                  */
    CondHandler handler;	/* handler function                   */
    int min;			/* minimum number of strings          */
    int max;			/* maximum number of strings          */
    int condid;			/* for overloading handler functions  */
    char *module;		/* module to autoload                 */
};

/* Condition is an infix */
#define CONDF_INFIX   1
/* Condition has been loaded from library */
#define CONDF_ADDED   2
/* When autoloading, enable all features in library */
#define CONDF_AUTOALL 4

#define CONDDEF(name, flags, handler, min, max, condid) \
    { NULL, name, flags, handler, min, max, condid, NULL }

/* Flags for redirections */

enum {
    /* Mark a here-string that came from a here-document */
    REDIRF_FROM_HEREDOC = 1
};

/* tree element for redirection lists */

struct redir {
    int type;
    int flags;
    int fd1, fd2;
    char *name;
    char *varid;
    char *here_terminator;
    char *munged_here_terminator;
};

/* The number of fds space is allocated for  *
 * each time a multio must increase in size. */
#define MULTIOUNIT 8

/* A multio is a list of fds associated with a certain fd.       *
 * Thus if you do "foo >bar >ble", the multio for fd 1 will have *
 * two fds, the result of open("bar",...), and the result of     *
 * open("ble",....).                                             */

/* structure used for multiple i/o redirection */
/* one for each fd open                        */

struct multio {
    int ct;			/* # of redirections on this fd                 */
    int rflag;			/* 0 if open for reading, 1 if open for writing */
    int pipe;			/* fd of pipe if ct > 1                         */
    int fds[MULTIOUNIT];	/* list of src/dests redirected to/from this fd */
};

/* lvalue for variable assignment/expansion */

struct value {
    int isarr;
    Param pm;		/* parameter node                      */
    int flags;		/* flags defined below                 */
    int start;		/* first element of array slice, or -1 */
    int end;		/* 1-rel last element of array slice, or -1 */
    char **arr;		/* cache for hash turned into array */
};

enum {
    VALFLAG_INV =	0x0001,	/* We are performing inverse subscripting */
    VALFLAG_EMPTY =	0x0002,	/* Subscripted range is empty */
    VALFLAG_SUBST =     0x0004  /* Substitution, so apply padding, case flags */
};

#define MAX_ARRLEN    262144

/********************************************/
/* Definitions for word code                 */
/********************************************/

typedef unsigned int wordcode;
typedef wordcode *Wordcode;

typedef struct funcdump *FuncDump;
typedef struct eprog *Eprog;

struct funcdump {
    FuncDump next;		/* next in list */
    dev_t dev;			/* device */
    ino_t ino;			/* indoe number */
    int fd;			/* file descriptor */
    Wordcode map;		/* pointer to header */
    Wordcode addr;		/* mapped region */
    int len;			/* length */
    int count;			/* reference count */
    char *filename;
};

/*
 * A note on the use of reference counts in Eprogs.
 *
 * When an Eprog is created, nref is set to -1 if the Eprog is on the
 * heap; then no attempt is ever made to free it.  (This information is
 * already present in EF_HEAP; we use the redundancy for debugging
 * checks.)
 *
 * Otherwise, nref is initialised to 1.  Calling freeprog() decrements
 * nref and frees the Eprog if the count is now zero.  When the Eprog
 * is in use, we call useeprog() at the start and freeprog() at the
 * end to increment and decrement the reference counts.  If an attempt
 * is made to free the Eprog from within, this will then take place
 * when execution is finished, typically in the call to freeeprog()
 * in execode().  If the Eprog was on the heap, neither useeprog()
 * nor freeeprog() has any effect.
 */
struct eprog {
    int flags;			/* EF_* below */
    int len;			/* total block length */
    int npats;			/* Patprog cache size */
    int nref;			/* number of references: delete when zero */
    Patprog *pats;		/* the memory block, the patterns */
    Wordcode prog;		/* memory block ctd, the code */
    char *strs;			/* memory block ctd, the strings */
    Shfunc shf;			/* shell function for autoload */
    FuncDump dump;		/* dump file this is in */
};

#define EF_REAL 1
#define EF_HEAP 2
#define EF_MAP  4
#define EF_RUN  8

typedef struct estate *Estate;

struct estate {
    Eprog prog;			/* the eprog executed */
    Wordcode pc;		/* program counter, current pos */
    char *strs;			/* strings from prog */
};

typedef struct eccstr *Eccstr;

struct eccstr {
    Eccstr left, right;
    char *str;
    wordcode offs, aoffs;
    int nfunc;
};

#define EC_NODUP  0
#define EC_DUP    1
#define EC_DUPTOK 2

#define WC_CODEBITS 5

#define wc_code(C)   ((C) & ((wordcode) ((1 << WC_CODEBITS) - 1)))
#define wc_data(C)   ((C) >> WC_CODEBITS)
#define wc_bdata(D)  ((D) << WC_CODEBITS)
#define wc_bld(C,D)  (((wordcode) (C)) | (((wordcode) (D)) << WC_CODEBITS))

#define WC_END      0
#define WC_LIST     1
#define WC_SUBLIST  2
#define WC_PIPE     3
#define WC_REDIR    4
#define WC_ASSIGN   5
#define WC_SIMPLE   6
#define WC_TYPESET  7
#define WC_SUBSH    8
#define WC_CURSH    9
#define WC_TIMED   10
#define WC_FUNCDEF 11
#define WC_FOR     12
#define WC_SELECT  13
#define WC_WHILE   14
#define WC_REPEAT  15
#define WC_CASE    16
#define WC_IF      17
#define WC_COND    18
#define WC_ARITH   19
#define WC_AUTOFN  20
#define WC_TRY     21

/* increment as necessary */
#define WC_COUNT   22

#define WCB_END()           wc_bld(WC_END, 0)

#define WC_LIST_TYPE(C)     wc_data(C)
#define Z_END               (1<<4) 
#define Z_SIMPLE            (1<<5)
#define WC_LIST_FREE        (6)	/* Next bit available in integer */
#define WC_LIST_SKIP(C)     (wc_data(C) >> WC_LIST_FREE)
#define WCB_LIST(T,O)       wc_bld(WC_LIST, ((T) | ((O) << WC_LIST_FREE)))

#define WC_SUBLIST_TYPE(C)  (wc_data(C) & ((wordcode) 3))
#define WC_SUBLIST_END      0
#define WC_SUBLIST_AND      1
#define WC_SUBLIST_OR       2
#define WC_SUBLIST_FLAGS(C) (wc_data(C) & ((wordcode) 0x1c))
#define WC_SUBLIST_COPROC   4
#define WC_SUBLIST_NOT      8
#define WC_SUBLIST_SIMPLE  16
#define WC_SUBLIST_FREE    (5)	/* Next bit available in integer */
#define WC_SUBLIST_SKIP(C)  (wc_data(C) >> WC_SUBLIST_FREE)
#define WCB_SUBLIST(T,F,O)  wc_bld(WC_SUBLIST, \
				   ((T) | (F) | ((O) << WC_SUBLIST_FREE)))

#define WC_PIPE_TYPE(C)     (wc_data(C) & ((wordcode) 1))
#define WC_PIPE_END         0
#define WC_PIPE_MID         1
#define WC_PIPE_LINENO(C)   (wc_data(C) >> 1)
#define WCB_PIPE(T,L)       wc_bld(WC_PIPE, ((T) | ((L) << 1)))

#define WC_REDIR_TYPE(C)    ((int)(wc_data(C) & REDIR_TYPE_MASK))
#define WC_REDIR_VARID(C)   ((int)(wc_data(C) & REDIR_VARID_MASK))
#define WC_REDIR_FROM_HEREDOC(C) ((int)(wc_data(C) & REDIR_FROM_HEREDOC_MASK))
#define WCB_REDIR(T)        wc_bld(WC_REDIR, (T))
/* Size of redir is 4 words if REDIR_VARID_MASK is set, else 3 */
#define WC_REDIR_WORDS(C)			\
    ((WC_REDIR_VARID(C) ? 4 : 3) +		\
     (WC_REDIR_FROM_HEREDOC(C) ? 2 : 0))

#define WC_ASSIGN_TYPE(C)   (wc_data(C) & ((wordcode) 1))
#define WC_ASSIGN_TYPE2(C)  ((wc_data(C) & ((wordcode) 2)) >> 1)
#define WC_ASSIGN_SCALAR    0
#define WC_ASSIGN_ARRAY     1
#define WC_ASSIGN_NEW       0
/*
 * In normal assignment, this indicate += to append.
 * In assignment following a typeset, where that's not allowed,
 * we overload this to indicate a variable without an
 * assignment.
 */
#define WC_ASSIGN_INC       1
#define WC_ASSIGN_NUM(C)    (wc_data(C) >> 2)
#define WCB_ASSIGN(T,A,N)   wc_bld(WC_ASSIGN, ((T) | ((A) << 1) | ((N) << 2)))

#define WC_SIMPLE_ARGC(C)   wc_data(C)
#define WCB_SIMPLE(N)       wc_bld(WC_SIMPLE, (N))

#define WC_TYPESET_ARGC(C)  wc_data(C)
#define WCB_TYPESET(N)      wc_bld(WC_TYPESET, (N))

#define WC_SUBSH_SKIP(C)    wc_data(C)
#define WCB_SUBSH(O)        wc_bld(WC_SUBSH, (O))

#define WC_CURSH_SKIP(C)    wc_data(C)
#define WCB_CURSH(O)        wc_bld(WC_CURSH, (O))

#define WC_TIMED_TYPE(C)    wc_data(C)
#define WC_TIMED_EMPTY      0
#define WC_TIMED_PIPE       1
#define WCB_TIMED(T)        wc_bld(WC_TIMED, (T))

#define WC_FUNCDEF_SKIP(C)  wc_data(C)
#define WCB_FUNCDEF(O)      wc_bld(WC_FUNCDEF, (O))

#define WC_FOR_TYPE(C)      (wc_data(C) & 3)
#define WC_FOR_PPARAM       0
#define WC_FOR_LIST         1
#define WC_FOR_COND         2
#define WC_FOR_SKIP(C)      (wc_data(C) >> 2)
#define WCB_FOR(T,O)        wc_bld(WC_FOR, ((T) | ((O) << 2)))

#define WC_SELECT_TYPE(C)   (wc_data(C) & 1)
#define WC_SELECT_PPARAM    0
#define WC_SELECT_LIST      1
#define WC_SELECT_SKIP(C)   (wc_data(C) >> 1)
#define WCB_SELECT(T,O)     wc_bld(WC_SELECT, ((T) | ((O) << 1)))

#define WC_WHILE_TYPE(C)    (wc_data(C) & 1)
#define WC_WHILE_WHILE      0
#define WC_WHILE_UNTIL      1
#define WC_WHILE_SKIP(C)    (wc_data(C) >> 1)
#define WCB_WHILE(T,O)      wc_bld(WC_WHILE, ((T) | ((O) << 1)))

#define WC_REPEAT_SKIP(C)   wc_data(C)
#define WCB_REPEAT(O)       wc_bld(WC_REPEAT, (O))

#define WC_TRY_SKIP(C)	    wc_data(C)
#define WCB_TRY(O)	    wc_bld(WC_TRY, (O))

#define WC_CASE_TYPE(C)     (wc_data(C) & 7)
#define WC_CASE_HEAD        0
#define WC_CASE_OR          1
#define WC_CASE_AND         2
#define WC_CASE_TESTAND     3
#define WC_CASE_FREE	    (3) /* Next bit available in integer */
#define WC_CASE_SKIP(C)     (wc_data(C) >> WC_CASE_FREE)
#define WCB_CASE(T,O)       wc_bld(WC_CASE, ((T) | ((O) << WC_CASE_FREE)))

#define WC_IF_TYPE(C)       (wc_data(C) & 3)
#define WC_IF_HEAD          0
#define WC_IF_IF            1
#define WC_IF_ELIF          2
#define WC_IF_ELSE          3
#define WC_IF_SKIP(C)       (wc_data(C) >> 2)
#define WCB_IF(T,O)         wc_bld(WC_IF, ((T) | ((O) << 2)))

#define WC_COND_TYPE(C)     (wc_data(C) & 127)
#define WC_COND_SKIP(C)     (wc_data(C) >> 7)
#define WCB_COND(T,O)       wc_bld(WC_COND, ((T) | ((O) << 7)))

#define WCB_ARITH()         wc_bld(WC_ARITH, 0)

#define WCB_AUTOFN()        wc_bld(WC_AUTOFN, 0)

/********************************************/
/* Definitions for job table and job control */
/********************************************/

/* Entry in filelist linked list in job table */

struct jobfile {
    /* Record to be deleted or closed */
    union {
	char *name; /* Name of file to delete */
	int fd;	    /* File descriptor to close */
    } u;
    /* Discriminant */
    int is_fd;
};

/* entry in the job table */

struct job {
    pid_t gleader;		/* process group leader of this job  */
    pid_t other;		/* subjob id (SUPERJOB)
				 * or subshell pid (SUBJOB) */
    int stat;                   /* see STATs below                   */
    char *pwd;			/* current working dir of shell when *
				 * this job was spawned              */
    struct process *procs;	/* list of processes                 */
    struct process *auxprocs;	/* auxiliary processes e.g multios   */
    LinkList filelist;		/* list of files to delete when done */
				/* elements are struct jobfile */
    int stty_in_env;		/* if STTY=... is present            */
    struct ttyinfo *ty;		/* the modes specified by STTY       */
};

#define STAT_CHANGED	(0x0001) /* status changed and not reported      */
#define STAT_STOPPED	(0x0002) /* all procs stopped or exited          */
#define STAT_TIMED	(0x0004) /* job is being timed                   */
#define STAT_DONE	(0x0008) /* job is done                          */
#define STAT_LOCKED	(0x0010) /* shell is finished creating this job, */
                                 /*   may be deleted from job table      */
#define STAT_NOPRINT	(0x0020) /* job was killed internally,           */
                                 /*   we don't want to show that         */
#define STAT_INUSE	(0x0040) /* this job entry is in use             */
#define STAT_SUPERJOB	(0x0080) /* job has a subjob                     */
#define STAT_SUBJOB	(0x0100) /* job is a subjob                      */
#define STAT_WASSUPER   (0x0200) /* was a super-job, sub-job needs to be */
				 /* deleted */
#define STAT_CURSH	(0x0400) /* last command is in current shell     */
#define STAT_NOSTTY	(0x0800) /* the tty settings are not inherited   */
				 /* from this job when it exits.         */
#define STAT_ATTACH	(0x1000) /* delay reattaching shell to tty       */
#define STAT_SUBLEADER  (0x2000) /* is super-job, but leader is sub-shell */

#define STAT_BUILTIN    (0x4000) /* job at tail of pipeline is a builtin */
#define STAT_SUBJOB_ORPHANED (0x8000)
                                 /* STAT_SUBJOB with STAT_SUPERJOB exited */

#define SP_RUNNING -1		/* fake status for jobs currently running */

struct timeinfo {
    long ut;                    /* user space time   */
    long st;                    /* system space time */
};

#define JOBTEXTSIZE 80

/* Size to initialise the job table to, and to increment it by when needed. */
#define MAXJOBS_ALLOC	(50)

/* node in job process lists */

#ifdef HAVE_GETRUSAGE
typedef struct rusage child_times_t;
#else
typedef struct timeinfo child_times_t;
#endif

struct process {
    struct process *next;
    pid_t pid;                  /* process id                       */
    char text[JOBTEXTSIZE];	/* text to print when 'jobs' is run */
    int status;			/* return code from waitpid/wait3() */
    child_times_t ti;
    struct timeval bgtime;	/* time job was spawned             */
    struct timeval endtime;	/* time job exited                  */
};

struct execstack {
    struct execstack *next;

    pid_t list_pipe_pid;
    int nowait;
    int pline_level;
    int list_pipe_child;
    int list_pipe_job;
    char list_pipe_text[JOBTEXTSIZE];
    int lastval;
    int noeval;
    int badcshglob;
    pid_t cmdoutpid;
    int cmdoutval;
    int use_cmdoutval;
    int trap_return;
    int trap_state;
    int trapisfunc;
    int traplocallevel;
    int noerrs;
    int this_noerrexit;
    char *underscore;
};

struct heredocs {
    struct heredocs *next;
    int type;
    int pc;
    char *str;
};

struct dirsav {
    int dirfd, level;
    char *dirname;
    dev_t dev;
    ino_t ino;
};

#define MAX_PIPESTATS 256

/*******************************/
/* Definitions for Hash Tables */
/*******************************/

typedef void *(*VFunc) _((void *));
typedef void (*FreeFunc) _((void *));

typedef unsigned (*HashFunc)       _((const char *));
typedef void     (*TableFunc)      _((HashTable));
/*
 * Note that this is deliberately "char *", not "const char *",
 * since the AddNodeFunc is passed a pointer to a string that
 * will be stored and later freed.
 */
typedef void     (*AddNodeFunc)    _((HashTable, char *, void *));
typedef HashNode (*GetNodeFunc)    _((HashTable, const char *));
typedef HashNode (*RemoveNodeFunc) _((HashTable, const char *));
typedef void     (*FreeNodeFunc)   _((HashNode));
typedef int      (*CompareFunc)    _((const char *, const char *));

/* type of function that is passed to *
 * scanhashtable or scanmatchtable    */
typedef void     (*ScanFunc)       _((HashNode, int));
typedef void     (*ScanTabFunc)    _((HashTable, ScanFunc, int));

typedef void (*PrintTableStats) _((HashTable));

/* hash table for standard open hashing */

struct hashtable {
    /* HASHTABLE DATA */
    int hsize;			/* size of nodes[]  (number of hash values)   */
    int ct;			/* number of elements                         */
    HashNode *nodes;		/* array of size hsize                        */
    void *tmpdata;

    /* HASHTABLE METHODS */
    HashFunc hash;		/* pointer to hash function for this table    */
    TableFunc emptytable;	/* pointer to function to empty table         */
    TableFunc filltable;	/* pointer to function to fill table          */
    CompareFunc cmpnodes;	/* pointer to function to compare two nodes     */
    AddNodeFunc addnode;	/* pointer to function to add new node        */
    GetNodeFunc getnode;	/* pointer to function to get an enabled node */
    GetNodeFunc getnode2;	/* pointer to function to get node            */
				/* (getnode2 will ignore DISABLED flag)       */
    RemoveNodeFunc removenode;	/* pointer to function to delete a node       */
    ScanFunc disablenode;	/* pointer to function to disable a node      */
    ScanFunc enablenode;	/* pointer to function to enable a node       */
    FreeNodeFunc freenode;	/* pointer to function to free a node         */
    ScanFunc printnode;		/* pointer to function to print a node        */
    ScanTabFunc scantab;	/* pointer to function to scan table          */

#ifdef HASHTABLE_INTERNAL_MEMBERS
    HASHTABLE_INTERNAL_MEMBERS	/* internal use in hashtable.c                */
#endif
};

/* generic hash table node */

struct hashnode {
    HashNode next;		/* next in hash chain */
    char *nam;			/* hash key           */
    int flags;			/* various flags      */
};

/* The flag to disable nodes in a hash table.  Currently  *
 * you can disable builtins, shell functions, aliases and *
 * reserved words.                                        */
#define DISABLED	(1<<0)

/* node in shell option table */

struct optname {
    struct hashnode node;
    int optno;			/* option number */
};

/* node in shell reserved word hash table (reswdtab) */

struct reswd {
    struct hashnode node;
    int token;			/* corresponding lexer token */
};

/* node in alias hash table (aliastab) */

struct alias {
    struct hashnode node;
    char *text;			/* expansion of alias       */
    int inuse;			/* alias is being expanded  */
};

/* bit 0 of flags is the DISABLED flag */
/* is this alias global? */
#define ALIAS_GLOBAL	(1<<1)
/* is this an alias for suffix handling? */
#define ALIAS_SUFFIX	(1<<2)

/* structure for foo=bar assignments */

struct asgment {
    struct linknode node;
    char *name;
    int is_array;
    union {
	char *scalar;
	LinkList array;
    } value;
};

/*
 * Assignment is array?
 */
#define ASG_ARRAYP(asg) ((asg)->is_array)

/*
 * Assignment has value?
 * If the assignment is an arrray, then it certainly has a value --- we
 * can only tell if there's an expicit assignment.
 */

#define ASG_VALUEP(asg) (ASG_ARRAYP(asg) ||			\
			 ((asg)->value.scalar != (char *)0))

/* node in command path hash table (cmdnamtab) */

struct cmdnam {
    struct hashnode node;
    union {
	char **name;		/* full pathname for external commands */
	char *cmd;		/* file name for hashed commands       */
    }
    u;
};

/* flag for nodes explicitly added to *
 * cmdnamtab with hash builtin        */
#define HASHED		(1<<1)

/* node in shell function hash table (shfunctab) */

struct shfunc {
    struct hashnode node;
    char *filename;             /* Name of file located in */
    zlong lineno;		/* line number in above file */
    Eprog funcdef;		/* function definition    */
    Eprog redir;                /* redirections to apply */
    Emulation_options sticky;   /* sticky emulation definitions, if any */
};

/* Shell function context types. */

#define SFC_NONE     0		/* no function running */
#define SFC_DIRECT   1		/* called directly from the user */
#define SFC_SIGNAL   2		/* signal handler */
#define SFC_HOOK     3		/* one of the special functions */
#define SFC_WIDGET   4		/* user defined widget */
#define SFC_COMPLETE 5		/* called from completion code */
#define SFC_CWIDGET  6		/* new style completion widget */
#define SFC_SUBST    7          /* used to perform substitution task */

/* tp in funcstack */

enum {
    FS_SOURCE,
    FS_FUNC,
    FS_EVAL
};

/* node in function stack */

struct funcstack {
    Funcstack prev;		/* previous in stack */
    char *name;			/* name of function/sourced file called */
    char *filename;		/* file function resides in */
    char *caller;		/* name of caller */
    zlong flineno;		/* line number in file */
    zlong lineno;		/* line offset from beginning of function */
    int tp;     		/* type of entry: sourced file, func, eval */
};

/* node in list of function call wrappers */

typedef int (*WrapFunc) _((Eprog, FuncWrap, char *));

struct funcwrap {
    FuncWrap next;
    int flags;
    WrapFunc handler;
    Module module;
};

#define WRAPF_ADDED 1

#define WRAPDEF(func) \
    { NULL, 0, func, NULL }

/*
 * User-defined hook arrays
 */

/* Name appended to function name to get hook array */
#define HOOK_SUFFIX	"_functions"
/* Length of that including NUL byte */
#define HOOK_SUFFIX_LEN	11

/* node in builtin command hash table (builtintab) */

/*
 * Handling of options.
 *
 * Option strings are standard in that a trailing `:' indicates
 * a mandatory argument.  In addition, `::' indicates an optional
 * argument which must immediately follow the option letter if it is present.
 * `:%' indicates an optional numeric argument which may follow
 * the option letter or be in the next word; the only test is
 * that the next character is a digit, and no actual conversion is done.
 */

#define MAX_OPS 128

/* Macros taking struct option * and char argument */
/* Option was set as -X */
#define OPT_MINUS(ops,c)	((ops)->ind[c] & 1)
/* Option was set as +X */
#define OPT_PLUS(ops,c)		((ops)->ind[c] & 2)
/*
 * Option was set any old how, maybe including an argument
 * (cheap test when we don't care).  Some bits of code
 * expect this to be 1 or 0.
 */
#define OPT_ISSET(ops,c)	((ops)->ind[c] != 0)
/* Option has an argument */
#define OPT_HASARG(ops,c)	((ops)->ind[c] > 3)
/* The argument for the option; not safe if it doesn't have one */
#define OPT_ARG(ops,c)		((ops)->args[((ops)->ind[c] >> 2) - 1])
/* Ditto, but safely returns NULL if there is no argument. */
#define OPT_ARG_SAFE(ops,c)	(OPT_HASARG(ops,c) ? OPT_ARG(ops,c) : NULL)

struct options {
    unsigned char ind[MAX_OPS];
    char **args;
    int argscount, argsalloc;
};

/*
 * Handler arguments are: builtin name, null-terminated argument
 * list excluding command name, option structure, the funcid element from the
 * builtin structure.
 */

typedef int (*HandlerFunc) _((char *, char **, Options, int));
typedef int (*HandlerFuncAssign) _((char *, char **, LinkList, Options, int));
#define NULLBINCMD ((HandlerFunc) 0)

struct builtin {
    struct hashnode node;
    HandlerFunc handlerfunc;	/* pointer to function that executes this builtin     */
    int minargs;		/* minimum number of arguments                        */
    int maxargs;		/* maximum number of arguments, or -1 for no limit    */
    int funcid;			/* xbins (see above) for overloaded handlerfuncs      */
    char *optstr;		/* string of legal options                            */
    char *defopts;		/* options set by default for overloaded handlerfuncs */
};

#define BUILTIN(name, flags, handler, min, max, funcid, optstr, defopts) \
    { { NULL, name, flags }, handler, min, max, funcid, optstr, defopts }
#define BIN_PREFIX(name, flags) \
    BUILTIN(name, flags | BINF_PREFIX, NULLBINCMD, 0, 0, 0, NULL, NULL)

/* builtin flags */
/* DISABLE IS DEFINED AS (1<<0) */
#define BINF_PLUSOPTS		(1<<1)	/* +xyz legal */
#define BINF_PRINTOPTS		(1<<2)
#define BINF_ADDED		(1<<3)	/* is in the builtins hash table */
#define BINF_MAGICEQUALS	(1<<4)  /* needs automatic MAGIC_EQUAL_SUBST substitution */
#define BINF_PREFIX		(1<<5)
#define BINF_DASH		(1<<6)
#define BINF_BUILTIN		(1<<7)
#define BINF_COMMAND		(1<<8)
#define BINF_EXEC		(1<<9)
#define BINF_NOGLOB		(1<<10)
#define BINF_PSPECIAL		(1<<11)
/* Builtin option handling */
#define BINF_SKIPINVALID	(1<<12)	/* Treat invalid option as argument */
#define BINF_KEEPNUM		(1<<13) /* `[-+]NUM' can be an option */
#define BINF_SKIPDASH		(1<<14) /* Treat `-' as argument (maybe `+') */
#define BINF_DASHDASHVALID	(1<<15) /* Handle `--' even if SKIPINVALD */
#define BINF_CLEARENV		(1<<16) /* new process started with cleared env */
#define BINF_AUTOALL		(1<<17) /* autoload all features at once */
 /*
  * Handles options itself.  This is only useful if the option string for a
  * builtin with an empty option string.  It is used to indicate that "--"
  * does not terminate options.
  */
#define BINF_HANDLES_OPTS	(1<<18)
/*
 * Handles the assignement interface.  The argv list actually contains
 * two nested litsts, the first of normal arguments, and the second of
 * assignment structures.
 */
#define BINF_ASSIGN		(1<<19)

/**
 * Parameters passed to execcmd().
 * These are not opaque --- they are also used by the pipeline manager.
 */
struct execcmd_params {
    LinkList args;		/* All command prefixes, arguments & options */
    LinkList redir;		/* Redirections */
    Wordcode beg;		/* The code at the start of the command */
    Wordcode varspc;		/* The code for assignment parsed as such */
    Wordcode assignspc;		/* The code for assignment parsed as typeset */
    int type;			/* The WC_* type of the command */
    int postassigns;		/* The number of assignspc assiguments */
    int htok;			/* tokens in parameter list */
};

struct module {
    struct hashnode node;
    union {
	void *handle;
	Linkedmod linked;
	char *alias;
    } u;
    LinkList autoloads;
    LinkList deps;
    int wrapper;
};

/* We are in the process of loading the module */
#define MOD_BUSY    (1<<0)
/*
 * We are in the process of unloading the module.
 * Note this is not needed to indicate a module is actually
 * unloaded: for that, the handle (or linked pointer) is set to NULL.
 */
#define MOD_UNLOAD  (1<<1)
/* We are in the process of setting up the module */
#define MOD_SETUP   (1<<2)
/* Module is statically linked into the main binary */
#define MOD_LINKED  (1<<3)
/* Module setup has been carried out (and module has not been finished) */
#define MOD_INIT_S  (1<<4)
/* Module boot has been carried out (and module has not been finished) */
#define MOD_INIT_B  (1<<5)
/* Module record is an alias */
#define MOD_ALIAS   (1<<6)

typedef int (*Module_generic_func) _((void));
typedef int (*Module_void_func) _((Module));
typedef int (*Module_features_func) _((Module, char ***));
typedef int (*Module_enables_func) _((Module, int **));

struct linkedmod {
    char *name;
    Module_void_func setup;
    Module_features_func features;
    Module_enables_func enables;
    Module_void_func boot;
    Module_void_func cleanup;
    Module_void_func finish;
};

/*
 * Structure combining all the concrete features available in
 * a module and with space for information about abstract features.
 */
struct features {
    /* List of builtins provided by the module and the size thereof */
    Builtin bn_list;
    int bn_size;
    /* List of conditions provided by the module and the size thereof */
    Conddef cd_list;
    int cd_size;
    /* List of math functions provided by the module and the size thereof */
    MathFunc mf_list;
    int mf_size;
    /* List of parameters provided by the module and the size thereof */
    Paramdef pd_list;
    int pd_size;
    /* Number of abstract features */
    int n_abstract;
};

/*
 * Structure describing enables for one feature.
 */
struct feature_enables {
    /* String feature to enable (N.B. no leading +/- allowed) */
    char *str;
    /* Optional compiled pattern for str sans +/-, NULL for string match */
    Patprog pat;
};

/* C-function hooks */

typedef int (*Hookfn) _((Hookdef, void *));

struct hookdef {
    Hookdef next;
    char *name;
    Hookfn def;
    int flags;
    LinkList funcs;
};

#define HOOKF_ALL 1

#define HOOKDEF(name, func, flags) { NULL, name, (Hookfn) func, flags, NULL }

/*
 * Types used in pattern matching.  Most of these longs could probably
 * happily be ints.
 */

struct patprog {
    long		startoff;  /* length before start of programme */
    long		size;	   /* total size from start of struct */
    long		mustoff;   /* offset to string that must be present */
    long		patmlen;   /* length of pure string or longest match */
    int			globflags; /* globbing flags to set at start */
    int			globend;   /* globbing flags set after finish */
    int			flags;	   /* PAT_* flags */
    int			patnpar;   /* number of active parentheses */
    char		patstartch;
};

struct patstralloc {
    int unmetalen;		/* Unmetafied length of trial string */
    int unmetalenp;		/* Unmetafied length of path prefix.
				   If 0, no path prefix. */
    char *alloced;		/* Allocated string, may be NULL */
    char *progstrunmeta;	/* Unmetafied pure string in pattern, cached */
    int progstrunmetalen;	/* Length of the foregoing */
};

/* Flags used in pattern matchers (Patprog) and passed down to patcompile */

#define PAT_FILE	0x0001	/* Pattern is a file name */
#define PAT_FILET	0x0002	/* Pattern is top level file, affects ~ */
#define PAT_ANY		0x0004	/* Match anything (cheap "*") */
#define PAT_NOANCH	0x0008	/* Not anchored at end */
#define PAT_NOGLD	0x0010	/* Don't glob dots */
#define PAT_PURES	0x0020	/* Pattern is a pure string: set internally */
#define PAT_STATIC	0x0040	/* Don't copy pattern to heap as per default */
#define PAT_SCAN	0x0080	/* Scanning, so don't try must-match test */
#define PAT_ZDUP        0x0100  /* Copy pattern in real memory */
#define PAT_NOTSTART	0x0200	/* Start of string is not real start */
#define PAT_NOTEND	0x0400	/* End of string is not real end */
#define PAT_HAS_EXCLUDP	0x0800	/* (internal): top-level path1~path2. */
#define PAT_LCMATCHUC   0x1000  /* equivalent to setting (#l) */

/**
 * Indexes into the array of active pattern characters.
 * This must match the array zpc_chars in pattern.c.
 */
enum zpc_chars {
    /*
     * These characters both terminate a pattern segment and
     * a pure string segment.
     */
    ZPC_SLASH,			/* / active as file separator */
    ZPC_NULL,			/* \0 as string terminator */
    ZPC_BAR,			/* | for "or" */
    ZPC_OUTPAR,			/* ) for grouping */
    ZPC_TILDE,			/* ~ for exclusion (extended glob) */
    ZPC_SEG_COUNT,              /* No. of the above characters */
    /*
     * These characters terminate a pure string segment.
     */
    ZPC_INPAR = ZPC_SEG_COUNT,  /* ( for grouping */
    ZPC_QUEST,			/* ? as wildcard */
    ZPC_STAR,			/* * as wildcard */
    ZPC_INBRACK,		/* [ for character class */
    ZPC_INANG,			/* < for numeric glob */
    ZPC_HAT,			/* ^ for exclusion (extended glob) */
    ZPC_HASH,			/* # for repetition (extended glob) */
    ZPC_BNULLKEEP,		/* Special backslashed null not removed */
    /*
     * These characters are only valid before a parenthesis
     */
    ZPC_NO_KSH_GLOB,
    ZPC_KSH_QUEST = ZPC_NO_KSH_GLOB, /* ? for ?(...) in KSH_GLOB */
    ZPC_KSH_STAR,               /* * for *(...) in KSH_GLOB */
    ZPC_KSH_PLUS,               /* + for +(...) in KSH_GLOB */
    ZPC_KSH_BANG,               /* ! for !(...) in KSH_GLOB */
    ZPC_KSH_BANG2,              /* ! for !(...) in KSH_GLOB, untokenised */
    ZPC_KSH_AT,                 /* @ for @(...) in KSH_GLOB */
    ZPC_COUNT			/* Number of special chararacters */
};

/*
 * Structure to save disables special characters for function scope.
 */
struct zpc_disables_save {
    struct zpc_disables_save *next;
    /*
     * Bit vector of ZPC_COUNT disabled characters.
     * We'll live dangerously and assume ZPC_COUNT is no greater
     * than the number of bits in an unsigned int.
     */
    unsigned int disables;
};

typedef struct zpc_disables_save *Zpc_disables_save;

/*
 * Special match types used in character classes.  These
 * are represented as tokens, with Meta added.  The character
 * class is represented as a metafied string, with only these
 * tokens special.  Note that an active leading "!" or "^" for
 * negation is not part of the string but is flagged in the
 * surrounding context.
 *
 * These types are also used in character and equivalence classes
 * in completion matching.
 *
 * This must be kept ordered by the array colon_stuffs in pattern.c.
 */
/* Special value for first definition */
#define PP_FIRST  1
/* POSIX-defined types:  [:alpha:] etc. */
#define PP_ALPHA  1
#define PP_ALNUM  2
#define PP_ASCII  3
#define PP_BLANK  4
#define PP_CNTRL  5
#define PP_DIGIT  6
#define PP_GRAPH  7
#define PP_LOWER  8
#define PP_PRINT  9
#define PP_PUNCT  10
#define PP_SPACE  11
#define PP_UPPER  12
#define PP_XDIGIT 13
/* Zsh additions:  [:IDENT:] etc. */
#define PP_IDENT  14
#define PP_IFS    15
#define PP_IFSSPACE   16
#define PP_WORD   17
#define PP_INCOMPLETE 18
#define PP_INVALID 19
/* Special value for last definition */
#define PP_LAST   19

/* Unknown type.  Not used in a valid token. */
#define PP_UNKWN  20
/* Range: token followed by the (possibly multibyte) start and end */
#define PP_RANGE  21

/*
 * Argument to get_match_ret() in glob.c
 */
struct imatchdata {
    /* Metafied trial string */
    char *mstr;
    /* Its length */
    int mlen;
    /* Unmetafied string */
    char *ustr;
    /* Its length */
    int ulen;
    /* Flags (SUB_*) */
    int flags;
    /* Replacement string (metafied) */
    char *replstr;
    /*
     * List of bits of matches to concatenate with replacement string.
     * The data is a struct repldata.  It is not used in cases like
     * ${...//#foo/bar} even though SUB_GLOBAL is set, since the match
     * is anchored.  It goes on the heap.
     */
    LinkList repllist;
};

/* Globbing flags: lower 8 bits gives approx count */
#define GF_LCMATCHUC	0x0100
#define GF_IGNCASE	0x0200
#define GF_BACKREF	0x0400
#define GF_MATCHREF	0x0800
#define GF_MULTIBYTE	0x1000	/* Use multibyte if supported by build */

enum {
    /* Valid multibyte character from charref */
    ZMB_VALID,
    /* Incomplete multibyte character from charref */
    ZMB_INCOMPLETE,
    /* Invalid multibyte character charref */
    ZMB_INVALID
};

/* Dummy Patprog pointers. Used mainly in executable code, but the
 * pattern code needs to know about it, too. */

#define dummy_patprog1 ((Patprog) 1)
#define dummy_patprog2 ((Patprog) 2)

/* standard node types for get/set/unset union in parameter */

/*
 * note non-standard const in pointer declaration: structures are
 * assumed to be read-only.
 */
typedef const struct gsu_scalar *GsuScalar;
typedef const struct gsu_integer *GsuInteger;
typedef const struct gsu_float *GsuFloat;
typedef const struct gsu_array *GsuArray;
typedef const struct gsu_hash *GsuHash;

struct gsu_scalar {
    char *(*getfn) _((Param));
    void (*setfn) _((Param, char  *));
    void (*unsetfn) _((Param, int));
};

struct gsu_integer {
    zlong (*getfn) _((Param));
    void (*setfn) _((Param, zlong));
    void (*unsetfn) _((Param, int));
};

struct gsu_float {
    double (*getfn) _((Param));
    void (*setfn) _((Param, double));
    void (*unsetfn) _((Param, int));
};

struct gsu_array {
    char **(*getfn) _((Param));
    void (*setfn) _((Param, char **));
    void (*unsetfn) _((Param, int));
};

struct gsu_hash {
    HashTable (*getfn) _((Param));
    void (*setfn) _((Param, HashTable));
    void (*unsetfn) _((Param, int));
};


/* node used in parameter hash table (paramtab) */

struct param {
    struct hashnode node;

    /* the value of this parameter */
    union {
	void *data;		/* used by special parameter functions    */
	char **arr;		/* value if declared array   (PM_ARRAY)   */
	char *str;		/* value if declared string  (PM_SCALAR)  */
	zlong val;		/* value if declared integer (PM_INTEGER) */
	zlong *valptr;		/* value if special pointer to integer */
	double dval;		/* value if declared float
				                    (PM_EFLOAT|PM_FFLOAT) */
        HashTable hash;		/* value if declared assoc   (PM_HASHED)  */
    } u;

    /*
     * get/set/unset methods.
     *
     * Unlike the data union, this points to a single instance
     * for every type (although there are special types, e.g.
     * tied arrays have a different gsu_scalar struct from the
     * normal one).  It's really a poor man's vtable.
     */
    union {
	GsuScalar s;
	GsuInteger i;
	GsuFloat f;
	GsuArray a;
	GsuHash h;
    } gsu;

    int base;			/* output base or floating point prec    */
    int width;			/* field width                           */
    char *env;			/* location in environment, if exported  */
    char *ename;		/* name of corresponding environment var */
    Param old;			/* old struct for use with local         */
    int level;			/* if (old != NULL), level of localness  */
};

/* structure stored in struct param's u.data by tied arrays */
struct tieddata {
    char ***arrptr;		/* pointer to corresponding array */
    int joinchar;		/* character used to join arrays */
};

/* flags for parameters */

/* parameter types */
#define PM_SCALAR	0	/* scalar                                   */
#define PM_ARRAY	(1<<0)	/* array                                    */
#define PM_INTEGER	(1<<1)	/* integer                                  */
#define PM_EFLOAT	(1<<2)	/* double with %e output		    */
#define PM_FFLOAT	(1<<3)	/* double with %f output		    */
#define PM_HASHED	(1<<4)	/* association                              */

#define PM_TYPE(X) \
  (X & (PM_SCALAR|PM_INTEGER|PM_EFLOAT|PM_FFLOAT|PM_ARRAY|PM_HASHED))

#define PM_LEFT		(1<<5)	/* left justify, remove leading blanks      */
#define PM_RIGHT_B	(1<<6)	/* right justify, fill with leading blanks  */
#define PM_RIGHT_Z	(1<<7)	/* right justify, fill with leading zeros   */
#define PM_LOWER	(1<<8)	/* all lower case                           */

/* The following are the same since they *
 * both represent -u option to typeset   */
#define PM_UPPER	(1<<9)	/* all upper case                           */
#define PM_UNDEFINED	(1<<9)	/* undefined (autoloaded) shell function    */

#define PM_READONLY	(1<<10)	/* readonly                                 */
#define PM_TAGGED	(1<<11)	/* tagged                                   */
#define PM_EXPORTED	(1<<12)	/* exported                                 */

/* The following are the same since they *
 * both represent -U option to typeset   */
#define PM_UNIQUE	(1<<13)	/* remove duplicates                        */
#define PM_UNALIASED	(1<<13)	/* do not expand aliases when autoloading   */

#define PM_HIDE		(1<<14)	/* Special behaviour hidden by local        */
#define PM_HIDEVAL	(1<<15)	/* Value not shown in `typeset' commands    */
#define PM_TIED 	(1<<16)	/* array tied to colon-path or v.v.         */
#define PM_TAGGED_LOCAL (1<<16) /* (function): non-recursive PM_TAGGED      */

#define PM_KSHSTORED	(1<<17) /* function stored in ksh form              */
#define PM_ZSHSTORED	(1<<18) /* function stored in zsh form              */

/* Remaining flags do not correspond directly to command line arguments */
#define PM_DONTIMPORT_SUID (1<<19) /* do not import if running setuid */
#define PM_SINGLE       (1<<20) /* special can only have a single instance  */
#define PM_LOCAL	(1<<21) /* this parameter will be made local        */
#define PM_SPECIAL	(1<<22) /* special builtin parameter                */
#define PM_DONTIMPORT	(1<<23)	/* do not import this variable              */
#define PM_RESTRICTED	(1<<24) /* cannot be changed in restricted mode     */
#define PM_UNSET	(1<<25)	/* has null value                           */
#define PM_REMOVABLE	(1<<26)	/* special can be removed from paramtab     */
#define PM_AUTOLOAD	(1<<27) /* autoloaded from module                   */
#define PM_NORESTORE	(1<<28)	/* do not restore value of local special    */
#define PM_AUTOALL	(1<<28) /* autoload all features in module
				 * when loading: valid only if PM_AUTOLOAD
				 * is also present.
				 */
#define PM_HASHELEM     (1<<29) /* is a hash-element */
#define PM_NAMEDDIR     (1<<30) /* has a corresponding nameddirtab entry    */

/* The option string corresponds to the first of the variables above */
#define TYPESET_OPTSTR "aiEFALRZlurtxUhHTkz"

/* These typeset options take an optional numeric argument */
#define TYPESET_OPTNUM "LRZiEF"

/* Flags for extracting elements of arrays and associative arrays */
#define SCANPM_WANTVALS   (1<<0) /* Return value includes hash values */
#define SCANPM_WANTKEYS   (1<<1) /* Return value includes hash keys */
#define SCANPM_WANTINDEX  (1<<2) /* Return value includes array index */
#define SCANPM_MATCHKEY   (1<<3) /* Subscript matched against key */
#define SCANPM_MATCHVAL   (1<<4) /* Subscript matched against value */
#define SCANPM_MATCHMANY  (1<<5) /* Subscript matched repeatedly, return all */
#define SCANPM_ASSIGNING  (1<<6) /* Assigning whole array/hash */
#define SCANPM_KEYMATCH   (1<<7) /* keys of hash treated as patterns */
#define SCANPM_DQUOTED    (1<<8) /* substitution was double-quoted
				  * (only used for testing early end of
				  * subscript)
				  */
#define SCANPM_ARRONLY    (1<<9) /* value is array but we don't
				  * necessarily want to match multiple
				  * elements
				  */
/* "$foo[@]"-style substitution
 * Only sign bit is significant
 */
#define SCANPM_ISVAR_AT   ((int)(((unsigned int)-1)<<15))

/*
 * Flags for doing matches inside parameter substitutions, i.e.
 * ${...#...} and friends.  This could be an enum, but so
 * could a lot of other things.
 */

#define SUB_END		0x0001	/* match end instead of beginning, % or %%  */
#define SUB_LONG	0x0002	/* % or # doubled, get longest match */
#define SUB_SUBSTR	0x0004	/* match a substring */
#define SUB_MATCH	0x0008	/* include the matched portion */
#define SUB_REST	0x0010	/* include the unmatched portion */
#define SUB_BIND	0x0020	/* index of beginning of string */
#define SUB_EIND	0x0040	/* index of end of string */
#define SUB_LEN		0x0080	/* length of match */
#define SUB_ALL		0x0100	/* match complete string */
#define SUB_GLOBAL	0x0200	/* global substitution ${..//all/these} */
#define SUB_DOSUBST	0x0400	/* replacement string needs substituting */
#define SUB_RETFAIL	0x0800  /* return status 0 if no match */
#define SUB_START	0x1000  /* force match at start with SUB_END
				 * and no SUB_SUBSTR */
#define SUB_LIST	0x2000  /* no substitution, return list of matches */

/*
 * Structure recording multiple matches inside a test string.
 * b and e are the beginning and end of the match.
 * replstr is the replacement string, if any.
 */
struct repldata {
    int b, e;			/* beginning and end of chunk to replace */
    char *replstr;		/* replacement string to use */
};
typedef struct repldata *Repldata;

/*
 * Flags to zshtokenize.
 */
enum {
    /* Do glob substitution */
    ZSHTOK_SUBST = 0x0001,
    /* Use sh-style globbing */
    ZSHTOK_SHGLOB = 0x0002
};

/* Flags as the second argument to prefork */
enum {
    /* argument handled like typeset foo=bar */
    PREFORK_TYPESET       = 0x01,
    /* argument handled like the RHS of foo=bar */
    PREFORK_ASSIGN        = 0x02,
    /* single word substitution */
    PREFORK_SINGLE        = 0x04,
    /* explicitly split nested substitution */
    PREFORK_SPLIT         = 0x08,
    /* SHWORDSPLIT in parameter expn */
    PREFORK_SHWORDSPLIT   = 0x10,
    /* SHWORDSPLIT forced off in nested subst */
    PREFORK_NOSHWORDSPLIT = 0x20,
    /* Prefork is part of a parameter subexpression */
    PREFORK_SUBEXP        = 0x40
};

/*
 * Bit flags passed back from multsub() to paramsubst().
 * Some flags go from a nested parmsubst() through the enclosing
 * stringsubst() and prefork().
 */
enum {
    /*
     * Set if the string had whitespace at the start
     * that should cause word splitting against any preceeding string.
     */
    MULTSUB_WS_AT_START = 1,
    /*
     * Set if the string had whitespace at the end
     * that should cause word splitting against any following string.
     */
    MULTSUB_WS_AT_END   = 2,
    /*
     * Set by nested paramsubst() to indicate the return
     * value is a parameter name, rather than a value.
     */
    MULTSUB_PARAM_NAME  = 4
};

/*
 * Structure for adding parameters in a module.
 * The flags should declare the type; note PM_SCALAR is zero.
 *
 * Special hashes are recognized by getnfn so the PM_HASHED
 * is optional.  These get slightly non-standard attention:
 * the function createspecialhash is used to create them.
 *
 * The get/set/unset attribute may be NULL; in that case the
 * parameter is assigned methods suitable for handling the
 * tie variable var, if that is not NULL, else standard methods.
 *
 * pm is set when the parameter is added to the parameter table
 * and serves as a flag that the parameter has been added.
 */
struct paramdef {
    char *name;
    int flags;
    void *var;			/* tied internal variable, if any */
    const void *gsu;		/* get/set/unset structure, if special */
    GetNodeFunc getnfn;		/* function to get node, if special hash */
    ScanTabFunc scantfn;	/* function to scan table, if special hash */
    Param pm;			/* structure inserted into param table */
};

/*
 * Shorthand for common uses of adding parameters, with no special
 * hash properties.
 */
#define PARAMDEF(name, flags, var, gsu) \
    { name, flags, (void *) var, (void *) gsu, \
	    NULL, NULL, NULL \
    }
/*
 * Note that the following definitions are appropriate for defining
 * parameters that reference a variable (var).  Hence the get/set/unset
 * methods used will assume var needs dereferencing to get the value.
 */
#define INTPARAMDEF(name, var) \
    { name, PM_INTEGER, (void *) var, NULL,  NULL, NULL, NULL }
#define STRPARAMDEF(name, var) \
    { name, PM_SCALAR, (void *) var, NULL, NULL, NULL, NULL }
#define ARRPARAMDEF(name, var) \
    { name, PM_ARRAY, (void *) var, NULL, NULL, NULL, NULL }
/*
 * The following is appropriate for a module function that behaves
 * in a special fashion.  Parameters used in a module that don't
 * have special behaviour shouldn't be declared in a table but
 * should just be added with the standard parameter functions.
 *
 * These parameters are not marked as removable, since they
 * shouldn't be loaded as local parameters, unlike the special
 * Zle parameters that are added and removed on each call to Zle.
 * We add the PM_REMOVABLE flag when removing the feature corresponding
 * to the parameter.
 */
#define SPECIALPMDEF(name, flags, gsufn, getfn, scanfn) \
    { name, flags | PM_SPECIAL | PM_HIDE | PM_HIDEVAL, \
	    NULL, gsufn, getfn, scanfn, NULL }

/*
 * Flags for assignsparam and assignaparam.
 */
enum {
    ASSPM_AUGMENT = 1 << 0,
    ASSPM_WARN_CREATE = 1 << 1,
    ASSPM_ENV_IMPORT = 1 << 2
};

/* node for named directory hash table (nameddirtab) */

struct nameddir {
    struct hashnode node;
    char *dir;			/* the directory in full            */
    int diff;			/* strlen(.dir) - strlen(.nam)      */
};

/* flags for named directories */
/* DISABLED is defined (1<<0) */
#define ND_USERNAME	(1<<1)	/* nam is actually a username       */
#define ND_NOABBREV	(1<<2)	/* never print as abbrev (PWD or OLDPWD) */

/* Storage for single group/name mapping */
typedef struct {
    /* Name of group */
    char *name;
    /* Group identifier */
    gid_t gid;
} groupmap;
typedef groupmap *Groupmap;

/* Storage for a set of group/name mappings */
typedef struct {
    /* The set of name to gid mappings */
    Groupmap array;
    /* A count of the valid entries in groupmap. */
    int num;
} groupset;
typedef groupset *Groupset;

/* flags for controlling printing of hash table nodes */
#define PRINT_NAMEONLY		(1<<0)
#define PRINT_TYPE		(1<<1)
#define PRINT_LIST		(1<<2)
#define PRINT_KV_PAIR		(1<<3)
#define PRINT_INCLUDEVALUE	(1<<4)
#define PRINT_TYPESET		(1<<5)

/* flags for printing for the whence builtin */
#define PRINT_WHENCE_CSH	(1<<6)
#define PRINT_WHENCE_VERBOSE	(1<<7)
#define PRINT_WHENCE_SIMPLE	(1<<8)
#define PRINT_WHENCE_FUNCDEF	(1<<9)
#define PRINT_WHENCE_WORD	(1<<10)

/* Return values from loop() */

enum loop_return {
    /* Loop executed OK */
    LOOP_OK,
    /* Loop executed no code */
    LOOP_EMPTY,
    /* Loop encountered an error */
    LOOP_ERROR
};

/* Return values from source() */

enum source_return {
    /* Source ran OK */
    SOURCE_OK = 0,
    /* File not found */
    SOURCE_NOT_FOUND = 1,
    /* Internal error sourcing file */
    SOURCE_ERROR = 2
};

/***********************************/
/* Definitions for history control */
/***********************************/

/* history entry */

struct histent {
    struct hashnode node;

    Histent up;			/* previous line (moving upward)    */
    Histent down;		/* next line (moving downward)      */
    char *zle_text;		/* the edited history line,
				 * a metafied, NULL-terminated string,
				 * i.e the same format as the original
				 * entry
				 */
    time_t stim;		/* command started time (datestamp) */
    time_t ftim;		/* command finished time            */
    short *words;		/* Position of words in history     */
				/*   line:  as pairs of start, end  */
    int nwords;			/* Number of words in history line  */
    zlong histnum;		/* A sequential history number      */
};

#define HIST_MAKEUNIQUE	0x00000001	/* Kill this new entry if not unique */
#define HIST_OLD	0x00000002	/* Command is already written to disk*/
#define HIST_READ	0x00000004	/* Command was read back from disk*/
#define HIST_DUP	0x00000008	/* Command duplicates a later line */
#define HIST_FOREIGN	0x00000010	/* Command came from another shell */
#define HIST_TMPSTORE	0x00000020	/* Kill when user enters another cmd */
#define HIST_NOWRITE	0x00000040	/* Keep internally but don't write */

#define GETHIST_UPWARD  (-1)
#define GETHIST_DOWNWARD  1
#define GETHIST_EXACT     0

/* Parts of the code where history expansion is disabled *
 * should be within a pair of STOPHIST ... ALLOWHIST     */

#define STOPHIST (stophist += 4);
#define ALLOWHIST (stophist -= 4);

#define HISTFLAG_DONE   1
#define HISTFLAG_NOEXEC 2
#define HISTFLAG_RECALL 4
#define HISTFLAG_SETTY  8

#define HFILE_APPEND		0x0001
#define HFILE_SKIPOLD		0x0002
#define HFILE_SKIPDUPS		0x0004
#define HFILE_SKIPFOREIGN	0x0008
#define HFILE_FAST		0x0010
#define HFILE_NO_REWRITE	0x0020
#define HFILE_USE_OPTIONS	0x8000

/*
 * Flags argument to bufferwords() used
 * also by lexflags variable.
 */
/*
 * Kick the lexer into special string-analysis
 * mode without parsing.  Any bit set in
 * the flags has this effect, but this
 * has otherwise all the default effects.
 */
#define LEXFLAGS_ACTIVE		0x0001
/*
 * Being used from zle.  This is slightly more intrusive
 * (=> grotesquely non-modular) than use from within
 * the main shell, so it's a separate flag.
 */
#define LEXFLAGS_ZLE		0x0002
/*
 * Parse comments and treat each comment as a single string
 */
#define LEXFLAGS_COMMENTS_KEEP	0x0004
/*
 * Parse comments and strip them.
 */
#define LEXFLAGS_COMMENTS_STRIP	0x0008
/*
 * Either of the above
 */
#define LEXFLAGS_COMMENTS (LEXFLAGS_COMMENTS_KEEP|LEXFLAGS_COMMENTS_STRIP)
/*
 * Treat newlines as whitespace
 */
#define LEXFLAGS_NEWLINE	0x0010

/******************************************/
/* Definitions for programable completion */
/******************************************/

/* Nothing special. */
#define IN_NOTHING 0
/* In command position. */
#define IN_CMD     1
/* In a mathematical environment. */
#define IN_MATH    2
/* In a condition. */
#define IN_COND    3
/* In a parameter assignment (e.g. `foo=bar'). */
#define IN_ENV     4
/* In a parameter name in an assignment. */
#define IN_PAR     5


/******************************/
/* Definition for zsh options */
/******************************/

/* Possible values of emulation */

#define EMULATE_CSH  (1<<1) /* C shell */
#define EMULATE_KSH  (1<<2) /* Korn shell */
#define EMULATE_SH   (1<<3) /* Bourne shell */
#define EMULATE_ZSH  (1<<4) /* `native' mode */

/* Test for a shell emulation.  Use this rather than emulation directly. */
#define EMULATION(X)	(emulation & (X))

/* Return only base shell emulation field. */
#define SHELL_EMULATION()	(emulation & ((1<<5)-1))

/* Additional flags */

#define EMULATE_FULLY (1<<5) /* "emulate -R" in effect */
/*
 * Higher bits are used in options.c, record lowest unused bit...
 */
#define EMULATE_UNUSED (1<<6)

/* option indices */

enum {
    OPT_INVALID,
    ALIASESOPT,
    ALLEXPORT,
    ALWAYSLASTPROMPT,
    ALWAYSTOEND,
    APPENDHISTORY,
    AUTOCD,
    AUTOCONTINUE,
    AUTOLIST,
    AUTOMENU,
    AUTONAMEDIRS,
    AUTOPARAMKEYS,
    AUTOPARAMSLASH,
    AUTOPUSHD,
    AUTOREMOVESLASH,
    AUTORESUME,
    BADPATTERN,
    BANGHIST,
    BAREGLOBQUAL,
    BASHAUTOLIST,
    BASHREMATCH,
    BEEP,
    BGNICE,
    BRACECCL,
    BSDECHO,
    CASEGLOB,
    CASEMATCH,
    CBASES,
    CDABLEVARS,
    CHASEDOTS,
    CHASELINKS,
    CHECKJOBS,
    CLOBBER,
    APPENDCREATE,
    COMBININGCHARS,
    COMPLETEALIASES,
    COMPLETEINWORD,
    CORRECT,
    CORRECTALL,
    CONTINUEONERROR,
    CPRECEDENCES,
    CSHJUNKIEHISTORY,
    CSHJUNKIELOOPS,
    CSHJUNKIEQUOTES,
    CSHNULLCMD,
    CSHNULLGLOB,
    DEBUGBEFORECMD,
    EMACSMODE,
    EQUALS,
    ERREXIT,
    ERRRETURN,
    EXECOPT,
    EXTENDEDGLOB,
    EXTENDEDHISTORY,
    EVALLINENO,
    FLOWCONTROL,
    FORCEFLOAT,
    FUNCTIONARGZERO,
    GLOBOPT,
    GLOBALEXPORT,
    GLOBALRCS,
    GLOBASSIGN,
    GLOBCOMPLETE,
    GLOBDOTS,
    GLOBSTARSHORT,
    GLOBSUBST,
    HASHCMDS,
    HASHDIRS,
    HASHEXECUTABLESONLY,
    HASHLISTALL,
    HISTALLOWCLOBBER,
    HISTBEEP,
    HISTEXPIREDUPSFIRST,
    HISTFCNTLLOCK,
    HISTFINDNODUPS,
    HISTIGNOREALLDUPS,
    HISTIGNOREDUPS,
    HISTIGNORESPACE,
    HISTLEXWORDS,
    HISTNOFUNCTIONS,
    HISTNOSTORE,
    HISTREDUCEBLANKS,
    HISTSAVEBYCOPY,
    HISTSAVENODUPS,
    HISTSUBSTPATTERN,
    HISTVERIFY,
    HUP,
    IGNOREBRACES,
    IGNORECLOSEBRACES,
    IGNOREEOF,
    INCAPPENDHISTORY,
    INCAPPENDHISTORYTIME,
    INTERACTIVE,
    INTERACTIVECOMMENTS,
    KSHARRAYS,
    KSHAUTOLOAD,
    KSHGLOB,
    KSHOPTIONPRINT,
    KSHTYPESET,
    KSHZEROSUBSCRIPT,
    LISTAMBIGUOUS,
    LISTBEEP,
    LISTPACKED,
    LISTROWSFIRST,
    LISTTYPES,
    LOCALLOOPS,
    LOCALOPTIONS,
    LOCALPATTERNS,
    LOCALTRAPS,
    LOGINSHELL,
    LONGLISTJOBS,
    MAGICEQUALSUBST,
    MAILWARNING,
    MARKDIRS,
    MENUCOMPLETE,
    MONITOR,
    MULTIBYTE,
    MULTIFUNCDEF,
    MULTIOS,
    NOMATCH,
    NOTIFY,
    NULLGLOB,
    NUMERICGLOBSORT,
    OCTALZEROES,
    OVERSTRIKE,
    PATHDIRS,
    PATHSCRIPT,
    PIPEFAIL,
    POSIXALIASES,
    POSIXARGZERO,
    POSIXBUILTINS,
    POSIXCD,
    POSIXIDENTIFIERS,
    POSIXJOBS,
    POSIXSTRINGS,
    POSIXTRAPS,
    PRINTEIGHTBIT,
    PRINTEXITVALUE,
    PRIVILEGED,
    PROMPTBANG,
    PROMPTCR,
    PROMPTPERCENT,
    PROMPTSP,
    PROMPTSUBST,
    PUSHDIGNOREDUPS,
    PUSHDMINUS,
    PUSHDSILENT,
    PUSHDTOHOME,
    RCEXPANDPARAM,
    RCQUOTES,
    RCS,
    RECEXACT,
    REMATCHPCRE,
    RESTRICTED,
    RMSTARSILENT,
    RMSTARWAIT,
    SHAREHISTORY,
    SHFILEEXPANSION,
    SHGLOB,
    SHINSTDIN,
    SHNULLCMD,
    SHOPTIONLETTERS,
    SHORTLOOPS,
    SHWORDSPLIT,
    SINGLECOMMAND,
    SINGLELINEZLE,
    SOURCETRACE,
    SUNKEYBOARDHACK,
    TRANSIENTRPROMPT,
    TRAPSASYNC,
    TYPESETSILENT,
    UNSET,
    VERBOSE,
    VIMODE,
    WARNCREATEGLOBAL,
    XTRACE,
    USEZLE,
    DVORAK,
    OPT_SIZE
};

/*
 * Size required to fit an option number.
 * If OPT_SIZE goes above 256 this will need to expand.
 */
typedef unsigned char OptIndex;

#undef isset
#define isset(X) (opts[X])
#define unset(X) (!opts[X])

#define interact (isset(INTERACTIVE))
#define jobbing  (isset(MONITOR))
#define islogin  (isset(LOGINSHELL))

/*
 * Record of emulation and options that need to be set
 * for a full "emulate".
 */
struct emulation_options {
    /* The emulation itself */
    int emulation;
    /* The number of options in on_opts. */
    int n_on_opts;
    /* The number of options in off_opts. */
    int n_off_opts;
    /*
     * Array of options to be turned on.
     * Only options specified explicitly in the emulate command
     * are recorded.  Null if n_on_opts is zero.
     */
    OptIndex *on_opts;
    /* Array of options to be turned off, similar. */
    OptIndex *off_opts;
};

/***********************************************/
/* Definitions for terminal and display control */
/***********************************************/

/* tty state structure */

struct ttyinfo {
#ifdef HAVE_TERMIOS_H
    struct termios tio;
#else
# ifdef HAVE_TERMIO_H
    struct termio tio;
# else
    struct sgttyb sgttyb;
    int lmodes;
    struct tchars tchars;
    struct ltchars ltchars;
# endif
#endif
#ifdef TIOCGWINSZ
    struct winsize winsize;
#endif
};

#ifndef __INTERIX
/* defines for whether tabs expand to spaces */
#if defined(HAVE_TERMIOS_H) || defined(HAVE_TERMIO_H)
#define SGTTYFLAG       shttyinfo.tio.c_oflag
#else   /* we're using sgtty */
#define SGTTYFLAG       shttyinfo.sgttyb.sg_flags
#endif
# ifdef TAB3
#define SGTABTYPE       TAB3
# else
#  ifdef OXTABS
#define SGTABTYPE       OXTABS
#  else
#   ifdef XTABS
#define SGTABTYPE       XTABS
#   endif
#  endif
# endif
#endif

/* flags for termflags */

#define TERM_BAD	0x01	/* terminal has extremely basic capabilities */
#define TERM_UNKNOWN	0x02	/* unknown terminal type */
#define TERM_NOUP	0x04	/* terminal has no up capability */
#define TERM_SHORT	0x08	/* terminal is < 3 lines high */
#define TERM_NARROW	0x10	/* terminal is < 3 columns wide */

/* interesting termcap strings */

#define TCCLEARSCREEN   0
#define TCLEFT          1
#define TCMULTLEFT      2
#define TCRIGHT         3
#define TCMULTRIGHT     4
#define TCUP            5
#define TCMULTUP        6
#define TCDOWN          7
#define TCMULTDOWN      8
#define TCDEL           9
#define TCMULTDEL      10
#define TCINS          11
#define TCMULTINS      12
#define TCCLEAREOD     13
#define TCCLEAREOL     14
#define TCINSLINE      15
#define TCDELLINE      16
#define TCNEXTTAB      17
#define TCBOLDFACEBEG  18
#define TCSTANDOUTBEG  19
#define TCUNDERLINEBEG 20
#define TCALLATTRSOFF  21
#define TCSTANDOUTEND  22
#define TCUNDERLINEEND 23
#define TCHORIZPOS     24
#define TCUPCURSOR     25
#define TCDOWNCURSOR   26
#define TCLEFTCURSOR   27
#define TCRIGHTCURSOR  28
#define TCSAVECURSOR   29
#define TCRESTRCURSOR  30
#define TCBACKSPACE    31
#define TCFGCOLOUR     32
#define TCBGCOLOUR     33
#define TC_COUNT       34

#define tccan(X) (tclen[X])

/*
 * Text attributes for displaying in ZLE
 */

#define TXTBOLDFACE   0x0001
#define TXTSTANDOUT   0x0002
#define TXTUNDERLINE  0x0004
#define TXTFGCOLOUR   0x0008
#define TXTBGCOLOUR   0x0010

#define TXT_ATTR_ON_MASK   0x001F

#define txtisset(X)  (txtattrmask & (X))
#define txtset(X)    (txtattrmask |= (X))
#define txtunset(X)  (txtattrmask &= ~(X))

#define TXTNOBOLDFACE	0x0020
#define TXTNOSTANDOUT	0x0040
#define TXTNOUNDERLINE	0x0080
#define TXTNOFGCOLOUR	0x0100
#define TXTNOBGCOLOUR	0x0200

#define TXT_ATTR_OFF_MASK  0x03E0
/* Bits to shift off right to get on */
#define TXT_ATTR_OFF_ON_SHIFT 5
#define TXT_ATTR_OFF_FROM_ON(attr)	\
    (((attr) & TXT_ATTR_ON_MASK) << TXT_ATTR_OFF_ON_SHIFT)
#define TXT_ATTR_ON_FROM_OFF(attr)	\
    (((attr) & TXT_ATTR_OFF_MASK) >> TXT_ATTR_OFF_ON_SHIFT)
/*
 * Indicates to zle_refresh.c that the character entry is an
 * index into the list of multiword symbols.
 */
#define TXT_MULTIWORD_MASK  0x0400

/* Mask for colour to use in foreground */
#define TXT_ATTR_FG_COL_MASK     0x000FF000
/* Bits to shift the foreground colour */
#define TXT_ATTR_FG_COL_SHIFT    (12)
/* Mask for colour to use in background */
#define TXT_ATTR_BG_COL_MASK     0x0FF00000
/* Bits to shift the background colour */
#define TXT_ATTR_BG_COL_SHIFT    (20)

/* Flag to use termcap AF sequence to set colour, if available */
#define TXT_ATTR_FG_TERMCAP      0x10000000
/* Flag to use termcap AB sequence to set colour, if available */
#define TXT_ATTR_BG_TERMCAP      0x20000000

/* Things to turn on, including values for the colour elements */
#define TXT_ATTR_ON_VALUES_MASK	\
    (TXT_ATTR_ON_MASK|TXT_ATTR_FG_COL_MASK|TXT_ATTR_BG_COL_MASK|\
     TXT_ATTR_FG_TERMCAP|TXT_ATTR_BG_TERMCAP)

/* Mask out everything to do with setting a foreground colour */
#define TXT_ATTR_FG_ON_MASK \
    (TXTFGCOLOUR|TXT_ATTR_FG_COL_MASK|TXT_ATTR_FG_TERMCAP)

/* Mask out everything to do with setting a background colour */
#define TXT_ATTR_BG_ON_MASK \
    (TXTBGCOLOUR|TXT_ATTR_BG_COL_MASK|TXT_ATTR_BG_TERMCAP)

/* Mask out everything to do with activating colours */
#define TXT_ATTR_COLOUR_ON_MASK			\
    (TXT_ATTR_FG_ON_MASK|TXT_ATTR_BG_ON_MASK)

#define txtchangeisset(T,X)	((T) & (X))
#define txtchangeget(T,A)	(((T) & A ## _MASK) >> A ## _SHIFT)
#define txtchangeset(T, X, Y)	((void)(T && (*T &= ~(Y), *T |= (X))))

/*
 * For outputting sequences to change colour: specify foreground
 * or background.
 */
#define COL_SEQ_FG	(0)
#define COL_SEQ_BG	(1)
#define COL_SEQ_COUNT	(2)

/*
 * Flags to testcap() and set_colour_attribute (which currently only
 * handles TSC_PROMPT).
 */
enum {
    /* Raw output: use stdout rather than shout */
    TSC_RAW = 0x0001,
    /* Output to current prompt buffer: only used when assembling prompt */
    TSC_PROMPT = 0x0002,
    /* Mask to get the output mode */
    TSC_OUTPUT_MASK = 0x0003,
    /* Change needs reset of other attributes */
    TSC_DIRTY = 0x0004
};

/****************************************/
/* Definitions for the %_ prompt escape */
/****************************************/

#define CMDSTACKSZ 256

#define CS_FOR          0
#define CS_WHILE        1
#define CS_REPEAT       2
#define CS_SELECT       3
#define CS_UNTIL        4
#define CS_IF           5
#define CS_IFTHEN       6
#define CS_ELSE         7
#define CS_ELIF         8
#define CS_MATH         9
#define CS_COND        10
#define CS_CMDOR       11
#define CS_CMDAND      12
#define CS_PIPE        13
#define CS_ERRPIPE     14
#define CS_FOREACH     15
#define CS_CASE        16
#define CS_FUNCDEF     17
#define CS_SUBSH       18
#define CS_CURSH       19
#define CS_ARRAY       20
#define CS_QUOTE       21
#define CS_DQUOTE      22
#define CS_BQUOTE      23
#define CS_CMDSUBST    24
#define CS_MATHSUBST   25
#define CS_ELIFTHEN    26
#define CS_HEREDOC     27
#define CS_HEREDOCD    28
#define CS_BRACE       29
#define CS_BRACEPAR    30
#define CS_ALWAYS      31

/* Increment as necessary */
#define CS_COUNT       32

/*********************
 * Memory management *
 *********************/

/*
 * A Heapid is a type for identifying, uniquely up to the point where
 * the count of new identifiers wraps. all heaps that are or
 * (importantly) have been valid.  Each valid heap is given an
 * identifier, and every time we push a heap we save the old identifier
 * and give the heap a new identifier so that when the heap is popped
 * or freed we can spot anything using invalid memory from the popped
 * heap.
 *
 * We could make this unsigned long long if we wanted a big range.
 */
typedef unsigned int Heapid;

#ifdef ZSH_HEAP_DEBUG

/* printf format specifier corresponding to Heapid */
#define HEAPID_FMT	"%x"

/* Marker that memory is permanently allocated */
#define HEAPID_PERMANENT (UINT_MAX)

/*
 * Heap debug verbosity.
 * Bits to be 'or'ed into the variable also called heap_debug_verbosity.
 */
enum heap_debug_verbosity {
    /* Report when we push a heap */
    HDV_PUSH = 0x01,
    /* Report when we pop a heap */
    HDV_POP = 0x02,
    /* Report when we create a new heap from which to allocate */
    HDV_CREATE = 0x04,
    /* Report every time we free a complete heap */
    HDV_FREE = 0x08,
    /* Report when we temporarily install a new set of heaps */
    HDV_NEW = 0x10,
    /* Report when we restore an old set of heaps */
    HDV_OLD = 0x20,
    /* Report when we temporarily switch heaps */
    HDV_SWITCH = 0x40,
    /*
     * Report every time we allocate memory from the heap.
     * This is very verbose, and arguably not very useful: we
     * would expect to allocate memory from a heap we create.
     * For much debugging heap_debug_verbosity = 0x7f should be sufficient.
     */
    HDV_ALLOC = 0x80
};

#define HEAP_ERROR(heap_id)			\
    fprintf(stderr, "%s:%d: HEAP DEBUG: invalid heap: " HEAPID_FMT ".\n", \
	    __FILE__, __LINE__, heap_id)
#endif

/* heappush saves the current heap state using this structure */

struct heapstack {
    struct heapstack *next;	/* next one in list for this heap */
    size_t used;
#ifdef ZSH_HEAP_DEBUG
    Heapid heap_id;
#endif
};

/* A zsh heap. */

struct heap {
    struct heap *next;		/* next one                                  */
    size_t size;		/* size of heap                              */
    size_t used;		/* bytes used from the heap                  */
    struct heapstack *sp;	/* used by pushheap() to save the value used */

#ifdef ZSH_HEAP_DEBUG
    unsigned int heap_id;
#endif

/* Uncomment the following if the struct needs padding to 64-bit size. */
/* Make sure sizeof(heap) is a multiple of 8 
#if defined(PAD_64_BIT) && !defined(__GNUC__)
    size_t dummy;		
#endif
*/
#define arena(X)	((char *) (X) + sizeof(struct heap))
}
#if defined(PAD_64_BIT) && defined(__GNUC__)
  __attribute__ ((aligned (8)))
#endif
;

# define NEWHEAPS(h)    do { Heap _switch_oldheaps = h = new_heaps(); do
# define OLDHEAPS       while (0); old_heaps(_switch_oldheaps); } while (0);

# define SWITCHHEAPS(o, h)  do { o = switch_heaps(h); do
# define SWITCHBACKHEAPS(o) while (0); switch_heaps(o); } while (0);

/****************/
/* Debug macros */
/****************/

#ifdef DEBUG
#define STRINGIFY_LITERAL(x)	# x
#define STRINGIFY(x)		STRINGIFY_LITERAL(x)
#define ERRMSG(x)		(__FILE__ ":" STRINGIFY(__LINE__) ": " x)
# define DPUTS(X,Y) if (!(X)) {;} else dputs(ERRMSG(Y))
# define DPUTS1(X,Y,Z1) if (!(X)) {;} else dputs(ERRMSG(Y), Z1)
# define DPUTS2(X,Y,Z1,Z2) if (!(X)) {;} else dputs(ERRMSG(Y), Z1, Z2)
# define DPUTS3(X,Y,Z1,Z2,Z3) if (!(X)) {;} else dputs(ERRMSG(Y), Z1, Z2, Z3)
#else
# define DPUTS(X,Y)
# define DPUTS1(X,Y,Z1)
# define DPUTS2(X,Y,Z1,Z2)
# define DPUTS3(X,Y,Z1,Z2,Z3)
#endif

/**************************/
/* Signal handling macros */
/**************************/

/* These used in the sigtrapped[] array */

#define ZSIG_TRAPPED	(1<<0)	/* Signal is trapped */
#define ZSIG_IGNORED	(1<<1)	/* Signal is ignored */
#define ZSIG_FUNC	(1<<2)	/* Trap is a function, not an eval list */
/* Mask to get the above flags */
#define ZSIG_MASK	(ZSIG_TRAPPED|ZSIG_IGNORED|ZSIG_FUNC)
/* No. of bits to shift local level when storing in sigtrapped */
#define ZSIG_ALIAS	(1<<3)  /* Trap is stored under an alias */
#define ZSIG_SHIFT	4

/*
 * State of traps, stored in trap_state.
 */
enum trap_state {
    /* Traps are not active; trap_return is not useful. */
    TRAP_STATE_INACTIVE,
    /*
     * Traps are set but haven't triggered; trap_return gives
     * minus function depth.
     */
    TRAP_STATE_PRIMED,
    /*
     * Trap has triggered to force a return; trap_return givens
     * return value.
     */
    TRAP_STATE_FORCE_RETURN
};

#define IN_EVAL_TRAP() \
    (intrap && !trapisfunc && traplocallevel == locallevel)

/*
 * Bits in the errflag variable.
 */
enum errflag_bits {
    /*
     * Standard internal error bit.
     */
    ERRFLAG_ERROR = 1,
    /*
     * User interrupt.
     */
    ERRFLAG_INT = 2,
    /*
     * Hard error --- return to top-level prompt in interactive
     * shell.  In non-interactive shell we'll typically already
     * have exited.  This is reset by "errflag = 0" in
     * loop(toplevel = 1, ...).
     */
    ERRFLAG_HARD = 4
};

/***********/
/* Sorting */
/***********/

typedef int (*CompareFn) _((const void *, const void *));

enum {
    SORTIT_ANYOLDHOW = 0,	/* Defaults */
    SORTIT_IGNORING_CASE = 1,
    SORTIT_NUMERICALLY = 2,
    SORTIT_BACKWARDS = 4,
    /*
     * Ignore backslashes that quote another character---which may
     * be another backslash; the second backslash is active.
     */
    SORTIT_IGNORING_BACKSLASHES = 8,
    /*
     * Ignored by strmetasort(); used by paramsubst() to indicate
     * there is some sorting to do.
     */
    SORTIT_SOMEHOW = 16,
};

/*
 * Element of array passed to qsort().
 */
struct sortelt {
    /* The original string. */
    char *orig;
    /* The string used for comparison. */
    const char *cmp;
    /*
     * The length of the string if passed down to the sort algorithm.
     * Used to sort the lengths together with the strings.
     */
    int origlen;
    /*
     * The length of the string, if needed, else -1.
     * The length is only needed if there are embededded nulls.
     */
    int len;
};

typedef struct sortelt *SortElt;

/*********************************************************/
/* Structures to save and restore for individual modules */
/*********************************************************/

/* History */
struct hist_stack {
    int histactive;
    int histdone;
    int stophist;
    int hlinesz;
    char *hline;
    char *hptr;
    short *chwords;
    int chwordlen;
    int chwordpos;
    int (*hgetc) _((void));
    void (*hungetc) _((int));
    void (*hwaddc) _((int));
    void (*hwbegin) _((int));
    void (*hwend) _((void));
    void (*addtoline) _((int));
    unsigned char *cstack;
    int csp;
};

/*
 * State of a lexical token buffer.
 *
 * It would be neater to include the pointer to the start of the buffer,
 * however the current code structure means that the standard instance
 * of this, tokstr, is visible in lots of places, so that's not
 * convenient.
 */

struct lexbufstate {
    /*
     * Next character to be added.
     * Set to NULL when the buffer is to be visible from elsewhere.
     */
    char *ptr;
    /* Allocated buffer size */
    int siz;
    /* Length in use */
    int len;
};

/* Lexical analyser */
struct lex_stack {
    int dbparens;
    int isfirstln;
    int isfirstch;
    int lexflags;
    enum lextok tok;
    char *tokstr;
    char *zshlextext;
    struct lexbufstate lexbuf;
    int lex_add_raw;
    char *tokstr_raw;
    struct lexbufstate lexbuf_raw;
    int lexstop;
    zlong toklineno;
};

/* Parser */
struct parse_stack {
    struct heredocs *hdocs;

    int incmdpos;
    int aliasspaceflag;
    int incond;
    int inredir;
    int incasepat;
    int isnewlin;
    int infor;
    int inrepeat_;
    int intypeset;

    int eclen, ecused, ecnpats;
    Wordcode ecbuf;
    Eccstr ecstrs;
    int ecsoffs, ecssub, ecnfunc;
};

/************************/
/* Flags to casemodifiy */
/************************/

enum {
    CASMOD_NONE,		/* dummy for tests */
    CASMOD_UPPER,
    CASMOD_LOWER,
    CASMOD_CAPS
};

/*******************************************/
/* Flags to third argument of getkeystring */
/*******************************************/

/*
 * By default handles some subset of \-escapes.  The following bits
 * turn on extra features.
 */
enum {
    /*
     * Handle octal where the first digit is non-zero e.g. \3, \33, \333
     * Otherwise \0333 etc. is handled, i.e. one of \0123 or \123 will
     * work, but not both.
     */
    GETKEY_OCTAL_ESC = (1 << 0),
    /*
     * Handle Emacs-like key sequences \C-x etc.
     * Also treat \E like \e and use backslashes to escape the
     * next character if not special, i.e. do all the things we
     * don't do with the echo builtin.
     */
    GETKEY_EMACS = (1 << 1),
    /* Handle ^X etc. */
    GETKEY_CTRL = (1 << 2),
    /* Handle \c (uses misc arg to getkeystring()) */
    GETKEY_BACKSLASH_C = (1 << 3),
    /* Do $'...' quoting (len arg to getkeystring() not used) */
    GETKEY_DOLLAR_QUOTE = (1 << 4),
    /* Handle \- (uses misc arg to getkeystring()) */
    GETKEY_BACKSLASH_MINUS = (1 << 5),
    /* Parse only one character (len arg to getkeystring() not used) */
    GETKEY_SINGLE_CHAR = (1 << 6),
    /*
     * If beyond offset in misc arg, add 1 to it for each character removed.
     * Yes, I know that doesn't seem to make much sense.
     * It's for use in completion, comprenez?
     */
    GETKEY_UPDATE_OFFSET = (1 << 7),
    /*
     * When replacing numeric escapes for printf format strings, % -> %%
     */
    GETKEY_PRINTF_PERCENT = (1 << 8)
};

/*
 * Standard combinations used within the shell.
 * Note GETKEYS_... instead of GETKEY_...: this is important in some cases.
 */
/* echo builtin */
#define GETKEYS_ECHO	(GETKEY_BACKSLASH_C)
/* printf format string:  \123 -> S, \0123 -> NL 3, \045 -> %% */
#define GETKEYS_PRINTF_FMT	\
        (GETKEY_OCTAL_ESC|GETKEY_BACKSLASH_C|GETKEY_PRINTF_PERCENT)
/* printf argument:  \123 -> \123, \0123 -> S */
#define GETKEYS_PRINTF_ARG	(GETKEY_BACKSLASH_C)
/* Full print without -e */
#define GETKEYS_PRINT	(GETKEY_OCTAL_ESC|GETKEY_BACKSLASH_C|GETKEY_EMACS)
/* bindkey */
#define GETKEYS_BINDKEY	(GETKEY_OCTAL_ESC|GETKEY_EMACS|GETKEY_CTRL)
/* $'...' */
#define GETKEYS_DOLLARS_QUOTE (GETKEY_OCTAL_ESC|GETKEY_EMACS|GETKEY_DOLLAR_QUOTE)
/* Single character for math processing */
#define GETKEYS_MATH	\
	(GETKEY_OCTAL_ESC|GETKEY_EMACS|GETKEY_CTRL|GETKEY_SINGLE_CHAR)
/* Used to process separators etc. with print-style escapes */
#define GETKEYS_SEP	(GETKEY_OCTAL_ESC|GETKEY_EMACS)
/* Used for suffix removal */
#define GETKEYS_SUFFIX		\
	(GETKEY_OCTAL_ESC|GETKEY_EMACS|GETKEY_CTRL|GETKEY_BACKSLASH_MINUS)

/**********************************/
/* Flags to third argument of zle */
/**********************************/

#define ZLRF_HISTORY	0x01	/* OK to access the history list */
#define ZLRF_NOSETTY	0x02	/* Don't set tty before return */
#define ZLRF_IGNOREEOF  0x04	/* Ignore an EOF from the keyboard */

/***************************/
/* Context of zleread call */
/***************************/

enum {
    ZLCON_LINE_START,		/* Command line at PS1 */
    ZLCON_LINE_CONT,		/* Command line at PS2 */
    ZLCON_SELECT,		/* Select loop */
    ZLCON_VARED			/* Vared command */
};

/****************/
/* Entry points */
/****************/

/* compctl entry point pointers */

typedef int (*CompctlReadFn) _((char *, char **, Options, char *));

/* ZLE entry point pointer */

typedef char * (*ZleEntryPoint)(int cmd, va_list ap);

/* Commands to pass to entry point */

enum {
    ZLE_CMD_GET_LINE,
    ZLE_CMD_READ,
    ZLE_CMD_ADD_TO_LINE,
    ZLE_CMD_TRASH,
    ZLE_CMD_RESET_PROMPT,
    ZLE_CMD_REFRESH,
    ZLE_CMD_SET_KEYMAP,
    ZLE_CMD_GET_KEY,
    ZLE_CMD_SET_HIST_LINE
};

/***************************************/
/* Hooks in core.                      */
/***************************************/

#define EXITHOOK       (zshhooks + 0)
#define BEFORETRAPHOOK (zshhooks + 1)
#define AFTERTRAPHOOK  (zshhooks + 2)

#ifdef MULTIBYTE_SUPPORT
/* Final argument to mb_niceformat() */
enum {
    NICEFLAG_HEAP = 1,		/* Heap allocation where needed */
    NICEFLAG_QUOTE = 2,		/* Result will appear in $'...' */
    NICEFLAG_NODUP = 4,         /* Leave allocated */
};

/* Metafied input */
#define nicezputs(str, outs)	(void)mb_niceformat((str), (outs), NULL, 0)
#define MB_METACHARINIT()	mb_charinit()
typedef wint_t convchar_t;
#define MB_METACHARLENCONV(str, cp)	mb_metacharlenconv((str), (cp))
#define MB_METACHARLEN(str)	mb_metacharlenconv(str, NULL)
#define MB_METASTRLEN(str)	mb_metastrlenend(str, 0, NULL)
#define MB_METASTRWIDTH(str)	mb_metastrlenend(str, 1, NULL)
#define MB_METASTRLEN2(str, widthp)	mb_metastrlenend(str, widthp, NULL)
#define MB_METASTRLEN2END(str, widthp, eptr)	\
    mb_metastrlenend(str, widthp, eptr)

/* Unmetafined input */
#define MB_CHARINIT()		mb_charinit()
#define MB_CHARLENCONV(str, len, cp)	mb_charlenconv((str), (len), (cp))
#define MB_CHARLEN(str, len)	mb_charlenconv((str), (len), NULL)

/*
 * We replace broken implementations with one that uses Unicode
 * characters directly as wide characters.  In principle this is only
 * likely to work if __STDC_ISO_10646__ is defined, since that's pretty
 * much what the definition tells us.  However, we happen to know this
 * works on MacOS which doesn't define that.
 */
#ifdef ENABLE_UNICODE9
#define WCWIDTH(wc)	mk_wcwidth(wc)
#elif defined(BROKEN_WCWIDTH) && (defined(__STDC_ISO_10646__) || defined(__APPLE__))
#define WCWIDTH(wc)	mk_wcwidth(wc)
#else
#define WCWIDTH(wc)	wcwidth(wc)
#endif
/*
 * Note WCWIDTH_WINT() takes wint_t, typically as a convchar_t.
 * It's written to use the wint_t from mb_metacharlenconv() without
 * further tests.
 *
 * This version has a non-multibyte definition that simply returns
 * 1.  We never expose WCWIDTH() in the non-multibyte world since
 * it's just a proxy for wcwidth() itself.
 */
#define WCWIDTH_WINT(wc)	zwcwidth(wc)

#define MB_INCOMPLETE	((size_t)-2)
#define MB_INVALID	((size_t)-1)

/*
 * MB_CUR_MAX is the maximum number of bytes that a single wide
 * character will convert into.  We use it to keep strings
 * sufficiently long.  It should always be defined, but if it isn't
 * just assume we are using Unicode which requires 6 characters.
 * (Note that it's not necessarily defined to a constant.)
 */
#ifndef MB_CUR_MAX
#define MB_CUR_MAX 6
#endif

/* Convert character or string to wide character or string */
#define ZWC(c)	L ## c
#define ZWS(s)	L ## s

/*
 * Test for a combining character.
 *
 * wc is assumed to be a wchar_t (i.e. we don't need zwcwidth).
 *
 * Pedantic note: in Unicode, a combining character need not be
 * zero length.  However, we are concerned here about display;
 * we simply need to know whether the character will be displayed
 * on top of another one.  We use "combining character" in this
 * sense throughout the shell.  I am not aware of a way of
 * detecting the Unicode trait in standard libraries.
 */
#ifdef BROKEN_WCWIDTH
/*
 * We can't be quite sure the wcwidth we've provided is entirely
 * in agreement with the system's, so be extra safe.
 */
#define IS_COMBINING(wc)	(wc != 0 && WCWIDTH(wc) == 0 && !iswcntrl(wc))
#else
#define IS_COMBINING(wc)	(wc != 0 && WCWIDTH(wc) == 0)
#endif
/*
 * Test for the base of a combining character.
 *
 * We assume a combining character can be successfully displayed with
 * any non-space printable character, which is what a graphic character
 * is, as long as it has non-zero width.  We need to avoid all forms of
 * space because the shell will split words on any whitespace.
 */
#define IS_BASECHAR(wc)		(iswgraph(wc) && WCWIDTH(wc) > 0)

#else /* not MULTIBYTE_SUPPORT */

#define MB_METACHARINIT()
typedef int convchar_t;
#define MB_METACHARLENCONV(str, cp)	metacharlenconv((str), (cp))
#define MB_METACHARLEN(str)	(*(str) == Meta ? 2 : 1)
#define MB_METASTRLEN(str)	ztrlen(str)
#define MB_METASTRWIDTH(str)	ztrlen(str)
#define MB_METASTRLEN2(str, widthp)	ztrlen(str)
#define MB_METASTRLEN2END(str, widthp, eptr)	ztrlenend(str, eptr)

#define MB_CHARINIT()
#define MB_CHARLENCONV(str, len, cp) charlenconv((str), (len), (cp))
#define MB_CHARLEN(str, len) ((len) ? 1 : 0)

#define WCWIDTH_WINT(c)	(1)

/* Leave character or string as is. */
#define ZWC(c)	c
#define ZWS(s)	s

#endif /* MULTIBYTE_SUPPORT */