Source

emacs / src / keymap.c

   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
/* Manipulation of keymaps
   Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc.

This file is part of GNU Emacs.

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

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

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */


#include <config.h>
#include <stdio.h>
#undef NULL
#include "lisp.h"
#include "commands.h"
#include "buffer.h"
#include "keyboard.h"
#include "termhooks.h"
#include "blockinput.h"
#include "puresize.h"

#define min(a, b) ((a) < (b) ? (a) : (b))

/* The number of elements in keymap vectors.  */
#define DENSE_TABLE_SIZE (0200)

/* Actually allocate storage for these variables */

Lisp_Object current_global_map;	/* Current global keymap */

Lisp_Object global_map;		/* default global key bindings */

Lisp_Object meta_map;		/* The keymap used for globally bound
				   ESC-prefixed default commands */

Lisp_Object control_x_map;	/* The keymap used for globally bound
				   C-x-prefixed default commands */

/* was MinibufLocalMap */
Lisp_Object Vminibuffer_local_map;
				/* The keymap used by the minibuf for local
				   bindings when spaces are allowed in the
				   minibuf */

/* was MinibufLocalNSMap */
Lisp_Object Vminibuffer_local_ns_map;			
				/* The keymap used by the minibuf for local
				   bindings when spaces are not encouraged
				   in the minibuf */

/* keymap used for minibuffers when doing completion */
/* was MinibufLocalCompletionMap */
Lisp_Object Vminibuffer_local_completion_map;

/* keymap used for minibuffers when doing completion and require a match */
/* was MinibufLocalMustMatchMap */
Lisp_Object Vminibuffer_local_must_match_map;

/* Alist of minor mode variables and keymaps.  */
Lisp_Object Vminor_mode_map_alist;

/* Keymap mapping ASCII function key sequences onto their preferred forms.
   Initialized by the terminal-specific lisp files.  See DEFVAR for more
   documentation.  */
Lisp_Object Vfunction_key_map;

/* Keymap mapping ASCII function key sequences onto their preferred forms.  */
Lisp_Object Vkey_translation_map;

/* A list of all commands given new bindings since a certain time
   when nil was stored here.
   This is used to speed up recomputation of menu key equivalents
   when Emacs starts up.   t means don't record anything here.  */
Lisp_Object Vdefine_key_rebound_commands;

Lisp_Object Qkeymapp, Qkeymap, Qnon_ascii;

/* A char with the CHAR_META bit set in a vector or the 0200 bit set
   in a string key sequence is equivalent to prefixing with this
   character.  */
extern Lisp_Object meta_prefix_char;

extern Lisp_Object Voverriding_local_map;

static Lisp_Object define_as_prefix ();
static Lisp_Object describe_buffer_bindings ();
static void describe_command (), describe_translation ();
static void describe_map ();

/* Keymap object support - constructors and predicates.			*/

DEFUN ("make-keymap", Fmake_keymap, Smake_keymap, 0, 1, 0,
  "Construct and return a new keymap, of the form (keymap VECTOR . ALIST).\n\
VECTOR is a vector which holds the bindings for the ASCII\n\
characters.  ALIST is an assoc-list which holds bindings for function keys,\n\
mouse events, and any other things that appear in the input stream.\n\
All entries in it are initially nil, meaning \"command undefined\".\n\n\
The optional arg STRING supplies a menu name for the keymap\n\
in case you use it as a menu with `x-popup-menu'.")
  (string)
     Lisp_Object string;
{
  Lisp_Object tail;
  if (!NILP (string))
    tail = Fcons (string, Qnil);
  else
    tail = Qnil;
  return Fcons (Qkeymap,
		Fcons (Fmake_vector (make_number (DENSE_TABLE_SIZE), Qnil),
		       tail));
}

DEFUN ("make-sparse-keymap", Fmake_sparse_keymap, Smake_sparse_keymap, 0, 1, 0,
  "Construct and return a new sparse-keymap list.\n\
Its car is `keymap' and its cdr is an alist of (CHAR . DEFINITION),\n\
which binds the character CHAR to DEFINITION, or (SYMBOL . DEFINITION),\n\
which binds the function key or mouse event SYMBOL to DEFINITION.\n\
Initially the alist is nil.\n\n\
The optional arg STRING supplies a menu name for the keymap\n\
in case you use it as a menu with `x-popup-menu'.")
  (string)
     Lisp_Object string;
{
  if (!NILP (string))
    return Fcons (Qkeymap, Fcons (string, Qnil));
  return Fcons (Qkeymap, Qnil);
}

/* This function is used for installing the standard key bindings
   at initialization time.

   For example:

   initial_define_key (control_x_map, Ctl('X'), "exchange-point-and-mark");  */

void
initial_define_key (keymap, key, defname)
     Lisp_Object keymap;
     int key;
     char *defname;
{
  store_in_keymap (keymap, make_number (key), intern (defname));
}

void
initial_define_lispy_key (keymap, keyname, defname)
     Lisp_Object keymap;
     char *keyname;
     char *defname;
{
  store_in_keymap (keymap, intern (keyname), intern (defname));
}

/* Define character fromchar in map frommap as an alias for character
   tochar in map tomap.  Subsequent redefinitions of the latter WILL
   affect the former. */

#if 0
void
synkey (frommap, fromchar, tomap, tochar)
     struct Lisp_Vector *frommap, *tomap;
     int fromchar, tochar;
{
  Lisp_Object v, c;
  XSETVECTOR (v, tomap);
  XSETFASTINT (c, tochar);
  frommap->contents[fromchar] = Fcons (v, c);
}
#endif /* 0 */

DEFUN ("keymapp", Fkeymapp, Skeymapp, 1, 1, 0,
  "Return t if OBJECT is a keymap.\n\
\n\
A keymap is a list (keymap . ALIST),\n\
or a symbol whose function definition is itself a keymap.\n\
ALIST elements look like (CHAR . DEFN) or (SYMBOL . DEFN);\n\
a vector of densely packed bindings for small character codes\n\
is also allowed as an element.")
  (object)
     Lisp_Object object;
{
  return (NILP (get_keymap_1 (object, 0, 0)) ? Qnil : Qt);
}

/* Check that OBJECT is a keymap (after dereferencing through any
   symbols).  If it is, return it.

   If AUTOLOAD is non-zero and OBJECT is a symbol whose function value
   is an autoload form, do the autoload and try again.
   If AUTOLOAD is nonzero, callers must assume GC is possible.

   ERROR controls how we respond if OBJECT isn't a keymap.
   If ERROR is non-zero, signal an error; otherwise, just return Qnil.

   Note that most of the time, we don't want to pursue autoloads.
   Functions like Faccessible_keymaps which scan entire keymap trees
   shouldn't load every autoloaded keymap.  I'm not sure about this,
   but it seems to me that only read_key_sequence, Flookup_key, and
   Fdefine_key should cause keymaps to be autoloaded.  */

Lisp_Object
get_keymap_1 (object, error, autoload)
     Lisp_Object object;
     int error, autoload;
{
  Lisp_Object tem;

 autoload_retry:
  tem = indirect_function (object);
  if (CONSP (tem) && EQ (XCONS (tem)->car, Qkeymap))
    return tem;

  /* Should we do an autoload?  Autoload forms for keymaps have
     Qkeymap as their fifth element.  */
  if (autoload
      && SYMBOLP (object)
      && CONSP (tem)
      && EQ (XCONS (tem)->car, Qautoload))
    {
      Lisp_Object tail;

      tail = Fnth (make_number (4), tem);
      if (EQ (tail, Qkeymap))
	{
	  struct gcpro gcpro1, gcpro2;

	  GCPRO2 (tem, object);
	  do_autoload (tem, object);
	  UNGCPRO;

	  goto autoload_retry;
	}
    }

  if (error)
    wrong_type_argument (Qkeymapp, object);
  else
    return Qnil;
}


/* Follow any symbol chaining, and return the keymap denoted by OBJECT.
   If OBJECT doesn't denote a keymap at all, signal an error.  */
Lisp_Object
get_keymap (object)
     Lisp_Object object;
{
  return get_keymap_1 (object, 1, 0);
}

/* Return the parent map of the keymap MAP, or nil if it has none.
   We assume that MAP is a valid keymap.  */

DEFUN ("keymap-parent", Fkeymap_parent, Skeymap_parent, 1, 1, 0,
  "Return the parent keymap of KEYMAP.")
  (keymap)
     Lisp_Object keymap;
{
  Lisp_Object list;

  keymap = get_keymap_1 (keymap, 1, 1);

  /* Skip past the initial element `keymap'.  */
  list = XCONS (keymap)->cdr;
  for (; CONSP (list); list = XCONS (list)->cdr)
    {
      /* See if there is another `keymap'.  */
      if (EQ (Qkeymap, XCONS (list)->car))
	return list;
    }

  return Qnil;
}

/* Set the parent keymap of MAP to PARENT.  */

DEFUN ("set-keymap-parent", Fset_keymap_parent, Sset_keymap_parent, 2, 2, 0,
  "Modify KEYMAP to set its parent map to PARENT.\n\
PARENT should be nil or another keymap.")
  (keymap, parent)
     Lisp_Object keymap, parent;
{
  Lisp_Object list, prev;
  int i;

  keymap = get_keymap_1 (keymap, 1, 1);
  if (!NILP (parent))
    parent = get_keymap_1 (parent, 1, 1);

  /* Skip past the initial element `keymap'.  */
  prev = keymap;
  while (1)
    {
      list = XCONS (prev)->cdr;
      /* If there is a parent keymap here, replace it.
	 If we came to the end, add the parent in PREV.  */
      if (! CONSP (list) || EQ (Qkeymap, XCONS (list)->car))
	{
	  /* If we already have the right parent, return now
	     so that we avoid the loops below.  */
	  if (EQ (XCONS (prev)->cdr, parent))
	    return parent;

	  XCONS (prev)->cdr = parent;
	  break;
	}
      prev = list;
    }

  /* Scan through for submaps, and set their parents too.  */

  for (list = XCONS (keymap)->cdr; CONSP (list); list = XCONS (list)->cdr)
    {
      /* Stop the scan when we come to the parent.  */
      if (EQ (XCONS (list)->car, Qkeymap))
	break;

      /* If this element holds a prefix map, deal with it.  */
      if (CONSP (XCONS (list)->car)
	  && CONSP (XCONS (XCONS (list)->car)->cdr))
	fix_submap_inheritance (keymap, XCONS (XCONS (list)->car)->car,
				XCONS (XCONS (list)->car)->cdr);

      if (VECTORP (XCONS (list)->car))
	for (i = 0; i < XVECTOR (XCONS (list)->car)->size; i++)
	  if (CONSP (XVECTOR (XCONS (list)->car)->contents[i]))
	    fix_submap_inheritance (keymap, make_number (i),
				    XVECTOR (XCONS (list)->car)->contents[i]);
    }

  return parent;
}

/* EVENT is defined in MAP as a prefix, and SUBMAP is its definition.
   if EVENT is also a prefix in MAP's parent,
   make sure that SUBMAP inherits that definition as its own parent.  */

fix_submap_inheritance (map, event, submap)
     Lisp_Object map, event, submap;
{
  Lisp_Object map_parent, parent_entry;

  /* SUBMAP is a cons that we found as a key binding.
     Discard the other things found in a menu key binding.  */

  if (CONSP (submap)
      && STRINGP (XCONS (submap)->car))
    {
      submap = XCONS (submap)->cdr;
      /* Also remove a menu help string, if any,
	 following the menu item name.  */
      if (CONSP (submap) && STRINGP (XCONS (submap)->car))
	submap = XCONS (submap)->cdr;
      /* Also remove the sublist that caches key equivalences, if any.  */
      if (CONSP (submap)
	  && CONSP (XCONS (submap)->car))
	{
	  Lisp_Object carcar;
	  carcar = XCONS (XCONS (submap)->car)->car;
	  if (NILP (carcar) || VECTORP (carcar))
	    submap = XCONS (submap)->cdr;
	}
    }

  /* If it isn't a keymap now, there's no work to do.  */
  if (! CONSP (submap)
      || ! EQ (XCONS (submap)->car, Qkeymap))
    return;

  map_parent = Fkeymap_parent (map);
  if (! NILP (map_parent))
    parent_entry = access_keymap (map_parent, event, 0, 0);
  else
    parent_entry = Qnil;

  /* If MAP's parent has something other than a keymap,
     our own submap shadows it completely, so use nil as SUBMAP's parent.  */
  if (! (CONSP (parent_entry) && EQ (XCONS (parent_entry)->car, Qkeymap)))
    parent_entry = Qnil;

  if (! EQ (parent_entry, submap))
    Fset_keymap_parent (submap, parent_entry);
}

/* Look up IDX in MAP.  IDX may be any sort of event.
   Note that this does only one level of lookup; IDX must be a single
   event, not a sequence. 

   If T_OK is non-zero, bindings for Qt are treated as default
   bindings; any key left unmentioned by other tables and bindings is
   given the binding of Qt.  

   If T_OK is zero, bindings for Qt are not treated specially.

   If NOINHERIT, don't accept a subkeymap found in an inherited keymap.  */

Lisp_Object
access_keymap (map, idx, t_ok, noinherit)
     Lisp_Object map;
     Lisp_Object idx;
     int t_ok;
     int noinherit;
{
  int noprefix = 0;
  Lisp_Object val;

  /* If idx is a list (some sort of mouse click, perhaps?),
     the index we want to use is the car of the list, which
     ought to be a symbol.  */
  idx = EVENT_HEAD (idx);

  /* If idx is a symbol, it might have modifiers, which need to
     be put in the canonical order.  */
  if (SYMBOLP (idx))
    idx = reorder_modifiers (idx);
  else if (INTEGERP (idx))
    /* Clobber the high bits that can be present on a machine
       with more than 24 bits of integer.  */
    XSETFASTINT (idx, XINT (idx) & (CHAR_META | (CHAR_META - 1)));

  {
    Lisp_Object tail;
    Lisp_Object t_binding;

    t_binding = Qnil;
    for (tail = map; CONSP (tail); tail = XCONS (tail)->cdr)
      {
	Lisp_Object binding;

	binding = XCONS (tail)->car;
	if (SYMBOLP (binding))
	  {
	    /* If NOINHERIT, stop finding prefix definitions
	       after we pass a second occurrence of the `keymap' symbol.  */
	    if (noinherit && EQ (binding, Qkeymap) && ! EQ (tail, map))
	      noprefix = 1;
	  }
	else if (CONSP (binding))
	  {
	    if (EQ (XCONS (binding)->car, idx))
	      {
		val = XCONS (binding)->cdr;
		if (noprefix && CONSP (val) && EQ (XCONS (val)->car, Qkeymap))
		  return Qnil;
		if (CONSP (val))
		  fix_submap_inheritance (map, idx, val);
		return val;
	      }
	    if (t_ok && EQ (XCONS (binding)->car, Qt))
	      t_binding = XCONS (binding)->cdr;
	  }
	else if (VECTORP (binding))
	  {
	    if (NATNUMP (idx) && XFASTINT (idx) < XVECTOR (binding)->size)
	      {
		val = XVECTOR (binding)->contents[XFASTINT (idx)];
		if (noprefix && CONSP (val) && EQ (XCONS (val)->car, Qkeymap))
		  return Qnil;
		if (CONSP (val))
		  fix_submap_inheritance (map, idx, val);
		return val;
	      }
	  }

	QUIT;
      }

    return t_binding;
  }
}

/* Given OBJECT which was found in a slot in a keymap,
   trace indirect definitions to get the actual definition of that slot.
   An indirect definition is a list of the form
   (KEYMAP . INDEX), where KEYMAP is a keymap or a symbol defined as one
   and INDEX is the object to look up in KEYMAP to yield the definition.

   Also if OBJECT has a menu string as the first element,
   remove that.  Also remove a menu help string as second element.

   If AUTOLOAD is nonzero, load autoloadable keymaps
   that are referred to with indirection.  */

Lisp_Object
get_keyelt (object, autoload)
     register Lisp_Object object;
     int autoload;
{
  while (1)
    {
      register Lisp_Object map, tem;

      /* If the contents are (KEYMAP . ELEMENT), go indirect.  */
      map = get_keymap_1 (Fcar_safe (object), 0, autoload);
      tem = Fkeymapp (map);
      if (!NILP (tem))
	object = access_keymap (map, Fcdr (object), 0, 0);
      
      /* If the keymap contents looks like (STRING . DEFN),
	 use DEFN.
	 Keymap alist elements like (CHAR MENUSTRING . DEFN)
	 will be used by HierarKey menus.  */
      else if (CONSP (object)
	       && STRINGP (XCONS (object)->car))
	{
	  object = XCONS (object)->cdr;
	  /* Also remove a menu help string, if any,
	     following the menu item name.  */
	  if (CONSP (object) && STRINGP (XCONS (object)->car))
	    object = XCONS (object)->cdr;
	  /* Also remove the sublist that caches key equivalences, if any.  */
	  if (CONSP (object)
	      && CONSP (XCONS (object)->car))
	    {
	      Lisp_Object carcar;
	      carcar = XCONS (XCONS (object)->car)->car;
	      if (NILP (carcar) || VECTORP (carcar))
		object = XCONS (object)->cdr;
	    }
	}

      else
	/* Anything else is really the value.  */
	return object;
    }
}

Lisp_Object
store_in_keymap (keymap, idx, def)
     Lisp_Object keymap;
     register Lisp_Object idx;
     register Lisp_Object def;
{
  /* If we are preparing to dump, and DEF is a menu element
     with a menu item string, copy it to ensure it is not pure.  */
  if (CONSP (def) && PURE_P (def) && STRINGP (XCONS (def)->car))
    def = Fcons (XCONS (def)->car, XCONS (def)->cdr);

  if (!CONSP (keymap) || ! EQ (XCONS (keymap)->car, Qkeymap))
    error ("attempt to define a key in a non-keymap");

  /* If idx is a list (some sort of mouse click, perhaps?),
     the index we want to use is the car of the list, which
     ought to be a symbol.  */
  idx = EVENT_HEAD (idx);

  /* If idx is a symbol, it might have modifiers, which need to
     be put in the canonical order.  */
  if (SYMBOLP (idx))
    idx = reorder_modifiers (idx);
  else if (INTEGERP (idx))
    /* Clobber the high bits that can be present on a machine
       with more than 24 bits of integer.  */
    XSETFASTINT (idx, XINT (idx) & (CHAR_META | (CHAR_META - 1)));

  /* Scan the keymap for a binding of idx.  */
  {
    Lisp_Object tail;

    /* The cons after which we should insert new bindings.  If the
       keymap has a table element, we record its position here, so new
       bindings will go after it; this way, the table will stay
       towards the front of the alist and character lookups in dense
       keymaps will remain fast.  Otherwise, this just points at the
       front of the keymap.  */
    Lisp_Object insertion_point;

    insertion_point = keymap;
    for (tail = XCONS (keymap)->cdr; CONSP (tail); tail = XCONS (tail)->cdr)
      {
	Lisp_Object elt;

	elt = XCONS (tail)->car;
	if (VECTORP (elt))
	  {
	    if (NATNUMP (idx) && XFASTINT (idx) < XVECTOR (elt)->size)
	      {
		XVECTOR (elt)->contents[XFASTINT (idx)] = def;
		return def;
	      }
	    insertion_point = tail;
	  }
	else if (CONSP (elt))
	  {
	    if (EQ (idx, XCONS (elt)->car))
	      {
		XCONS (elt)->cdr = def;
		return def;
	      }
	  }
	else if (SYMBOLP (elt))
	  {
	    /* If we find a 'keymap' symbol in the spine of KEYMAP,
               then we must have found the start of a second keymap
               being used as the tail of KEYMAP, and a binding for IDX
               should be inserted before it.  */
	    if (EQ (elt, Qkeymap))
	      goto keymap_end;
	  }

	QUIT;
      }

  keymap_end:
    /* We have scanned the entire keymap, and not found a binding for
       IDX.  Let's add one.  */
    XCONS (insertion_point)->cdr
      = Fcons (Fcons (idx, def), XCONS (insertion_point)->cdr);
  }
	  
  return def;
}


DEFUN ("copy-keymap", Fcopy_keymap, Scopy_keymap, 1, 1, 0,
  "Return a copy of the keymap KEYMAP.\n\
The copy starts out with the same definitions of KEYMAP,\n\
but changing either the copy or KEYMAP does not affect the other.\n\
Any key definitions that are subkeymaps are recursively copied.\n\
However, a key definition which is a symbol whose definition is a keymap\n\
is not copied.")
  (keymap)
     Lisp_Object keymap;
{
  register Lisp_Object copy, tail;

  copy = Fcopy_alist (get_keymap (keymap));

  for (tail = copy; CONSP (tail); tail = XCONS (tail)->cdr)
    {
      Lisp_Object elt;

      elt = XCONS (tail)->car;
      if (VECTORP (elt))
	{
	  int i;

	  elt = Fcopy_sequence (elt);
	  XCONS (tail)->car = elt;

	  for (i = 0; i < XVECTOR (elt)->size; i++)
	    if (!SYMBOLP (XVECTOR (elt)->contents[i])
		&& ! NILP (Fkeymapp (XVECTOR (elt)->contents[i])))
	      XVECTOR (elt)->contents[i] =
		Fcopy_keymap (XVECTOR (elt)->contents[i]);
	}
      else if (CONSP (elt))
	{
	  /* Skip the optional menu string.  */
	  if (CONSP (XCONS (elt)->cdr)
	      && STRINGP (XCONS (XCONS (elt)->cdr)->car))
	    {
	      Lisp_Object tem;

	      /* Copy the cell, since copy-alist didn't go this deep.  */
	      XCONS (elt)->cdr = Fcons (XCONS (XCONS (elt)->cdr)->car,
					XCONS (XCONS (elt)->cdr)->cdr);
	      elt = XCONS (elt)->cdr;

	      /* Also skip the optional menu help string.  */
	      if (CONSP (XCONS (elt)->cdr)
		  && STRINGP (XCONS (XCONS (elt)->cdr)->car))
		{
		  XCONS (elt)->cdr = Fcons (XCONS (XCONS (elt)->cdr)->car,
					    XCONS (XCONS (elt)->cdr)->cdr);
		  elt = XCONS (elt)->cdr;
		}
	      /* There may also be a list that caches key equivalences.
		 Just delete it for the new keymap.  */
	      if (CONSP (XCONS (elt)->cdr)
		  && CONSP (XCONS (XCONS (elt)->cdr)->car)
		  && (NILP (tem = XCONS (XCONS (XCONS (elt)->cdr)->car)->car)
		      || VECTORP (tem)))
		XCONS (elt)->cdr = XCONS (XCONS (elt)->cdr)->cdr;
	    }
	  if (CONSP (elt)
	      && ! SYMBOLP (XCONS (elt)->cdr)
	      && ! NILP (Fkeymapp (XCONS (elt)->cdr)))
	    XCONS (elt)->cdr = Fcopy_keymap (XCONS (elt)->cdr);
	}
    }

  return copy;
}

/* Simple Keymap mutators and accessors.				*/

/* GC is possible in this function if it autoloads a keymap.  */

DEFUN ("define-key", Fdefine_key, Sdefine_key, 3, 3, 0,
  "Args KEYMAP, KEY, DEF.  Define key sequence KEY, in KEYMAP, as DEF.\n\
KEYMAP is a keymap.  KEY is a string or a vector of symbols and characters\n\
meaning a sequence of keystrokes and events.\n\
Non-ASCII characters with codes above 127 (such as ISO Latin-1)\n\
can be included if you use a vector.\n\
DEF is anything that can be a key's definition:\n\
 nil (means key is undefined in this keymap),\n\
 a command (a Lisp function suitable for interactive calling)\n\
 a string (treated as a keyboard macro),\n\
 a keymap (to define a prefix key),\n\
 a symbol.  When the key is looked up, the symbol will stand for its\n\
    function definition, which should at that time be one of the above,\n\
    or another symbol whose function definition is used, etc.\n\
 a cons (STRING . DEFN), meaning that DEFN is the definition\n\
    (DEFN should be a valid definition in its own right),\n\
 or a cons (KEYMAP . CHAR), meaning use definition of CHAR in map KEYMAP.\n\
\n\
If KEYMAP is a sparse keymap, the pair binding KEY to DEF is added at\n\
the front of KEYMAP.")
  (keymap, key, def)
     Lisp_Object keymap;
     Lisp_Object key;
     Lisp_Object def;
{
  register int idx;
  register Lisp_Object c;
  register Lisp_Object tem;
  register Lisp_Object cmd;
  int metized = 0;
  int meta_bit;
  int length;
  struct gcpro gcpro1, gcpro2, gcpro3;

  keymap = get_keymap_1 (keymap, 1, 1);

  if (!VECTORP (key) && !STRINGP (key))
    key = wrong_type_argument (Qarrayp, key);

  length = XFASTINT (Flength (key));
  if (length == 0)
    return Qnil;

  if (SYMBOLP (def) && !EQ (Vdefine_key_rebound_commands, Qt))
    Vdefine_key_rebound_commands = Fcons (def, Vdefine_key_rebound_commands);

  GCPRO3 (keymap, key, def);

  if (VECTORP (key))
    meta_bit = meta_modifier;
  else
    meta_bit = 0x80;

  idx = 0;
  while (1)
    {
      c = Faref (key, make_number (idx));

      if (CONSP (c) && lucid_event_type_list_p (c))
	c = Fevent_convert_list (c);

      if (INTEGERP (c)
	  && (XINT (c) & meta_bit)
	  && !metized)
	{
	  c = meta_prefix_char;
	  metized = 1;
	}
      else
	{
	  if (INTEGERP (c))
	    XSETINT (c, XINT (c) & ~meta_bit);

	  metized = 0;
	  idx++;
	}

      if (! INTEGERP (c) && ! SYMBOLP (c) && ! CONSP (c))
	error ("Key sequence contains invalid events");

      if (idx == length)
	RETURN_UNGCPRO (store_in_keymap (keymap, c, def));

      cmd = get_keyelt (access_keymap (keymap, c, 0, 1), 1);

      /* If this key is undefined, make it a prefix.  */
      if (NILP (cmd))
	cmd = define_as_prefix (keymap, c);

      keymap = get_keymap_1 (cmd, 0, 1);
      if (NILP (keymap))
	/* We must use Fkey_description rather than just passing key to
	   error; key might be a vector, not a string.  */
	error ("Key sequence %s uses invalid prefix characters",
	       XSTRING (Fkey_description (key))->data);
    }
}

/* Value is number if KEY is too long; NIL if valid but has no definition. */
/* GC is possible in this function if it autoloads a keymap.  */

DEFUN ("lookup-key", Flookup_key, Slookup_key, 2, 3, 0,
  "In keymap KEYMAP, look up key sequence KEY.  Return the definition.\n\
nil means undefined.  See doc of `define-key' for kinds of definitions.\n\
\n\
A number as value means KEY is \"too long\";\n\
that is, characters or symbols in it except for the last one\n\
fail to be a valid sequence of prefix characters in KEYMAP.\n\
The number is how many characters at the front of KEY\n\
it takes to reach a non-prefix command.\n\
\n\
Normally, `lookup-key' ignores bindings for t, which act as default\n\
bindings, used when nothing else in the keymap applies; this makes it\n\
usable as a general function for probing keymaps.  However, if the\n\
third optional argument ACCEPT-DEFAULT is non-nil, `lookup-key' will\n\
recognize the default bindings, just as `read-key-sequence' does.")
  (keymap, key, accept_default)
     register Lisp_Object keymap;
     Lisp_Object key;
     Lisp_Object accept_default;
{
  register int idx;
  register Lisp_Object tem;
  register Lisp_Object cmd;
  register Lisp_Object c;
  int metized = 0;
  int length;
  int t_ok = ! NILP (accept_default);
  int meta_bit;
  struct gcpro gcpro1;

  keymap = get_keymap_1 (keymap, 1, 1);

  if (!VECTORP (key) && !STRINGP (key))
    key = wrong_type_argument (Qarrayp, key);

  length = XFASTINT (Flength (key));
  if (length == 0)
    return keymap;

  if (VECTORP (key))
    meta_bit = meta_modifier;
  else
    meta_bit = 0x80;

  GCPRO1 (key);

  idx = 0;
  while (1)
    {
      c = Faref (key, make_number (idx));

      if (CONSP (c) && lucid_event_type_list_p (c))
	c = Fevent_convert_list (c);

      if (INTEGERP (c)
	  && (XINT (c) & meta_bit)
	  && !metized)
	{
	  c = meta_prefix_char;
	  metized = 1;
	}
      else
	{
	  if (INTEGERP (c))
	    XSETINT (c, XINT (c) & ~meta_bit);

	  metized = 0;
	  idx++;
	}

      cmd = get_keyelt (access_keymap (keymap, c, t_ok, 0), 1);
      if (idx == length)
	RETURN_UNGCPRO (cmd);

      keymap = get_keymap_1 (cmd, 0, 1);
      if (NILP (keymap))
	RETURN_UNGCPRO (make_number (idx));

      QUIT;
    }
}

/* Make KEYMAP define event C as a keymap (i.e., as a prefix).
   Assume that currently it does not define C at all.
   Return the keymap.  */

static Lisp_Object
define_as_prefix (keymap, c)
     Lisp_Object keymap, c;
{
  Lisp_Object inherit, cmd;

  cmd = Fmake_sparse_keymap (Qnil);
  /* If this key is defined as a prefix in an inherited keymap,
     make it a prefix in this map, and make its definition
     inherit the other prefix definition.  */
  inherit = access_keymap (keymap, c, 0, 0);
#if 0
  /* This code is needed to do the right thing in the following case:
     keymap A inherits from B,
     you define KEY as a prefix in A,
     then later you define KEY as a prefix in B.
     We want the old prefix definition in A to inherit from that in B.
     It is hard to do that retroactively, so this code
     creates the prefix in B right away.

     But it turns out that this code causes problems immediately
     when the prefix in A is defined: it causes B to define KEY
     as a prefix with no subcommands.

     So I took out this code.  */
  if (NILP (inherit))
    {
      /* If there's an inherited keymap
	 and it doesn't define this key,
	 make it define this key.  */
      Lisp_Object tail;

      for (tail = Fcdr (keymap); CONSP (tail); tail = XCONS (tail)->cdr)
	if (EQ (XCONS (tail)->car, Qkeymap))
	  break;

      if (!NILP (tail))
	inherit = define_as_prefix (tail, c);
    }
#endif

  cmd = nconc2 (cmd, inherit);
  store_in_keymap (keymap, c, cmd);

  return cmd;
}

/* Append a key to the end of a key sequence.  We always make a vector.  */

Lisp_Object
append_key (key_sequence, key)
     Lisp_Object key_sequence, key;
{
  Lisp_Object args[2];

  args[0] = key_sequence;

  args[1] = Fcons (key, Qnil);
  return Fvconcat (2, args);
}


/* Global, local, and minor mode keymap stuff.				*/

/* We can't put these variables inside current_minor_maps, since under
   some systems, static gets macro-defined to be the empty string.
   Ickypoo.  */
static Lisp_Object *cmm_modes, *cmm_maps;
static int cmm_size;

/* Error handler used in current_minor_maps.  */
static Lisp_Object
current_minor_maps_error ()
{
  return Qnil;
}

/* Store a pointer to an array of the keymaps of the currently active
   minor modes in *buf, and return the number of maps it contains.

   This function always returns a pointer to the same buffer, and may
   free or reallocate it, so if you want to keep it for a long time or
   hand it out to lisp code, copy it.  This procedure will be called
   for every key sequence read, so the nice lispy approach (return a
   new assoclist, list, what have you) for each invocation would
   result in a lot of consing over time.

   If we used xrealloc/xmalloc and ran out of memory, they would throw
   back to the command loop, which would try to read a key sequence,
   which would call this function again, resulting in an infinite
   loop.  Instead, we'll use realloc/malloc and silently truncate the
   list, let the key sequence be read, and hope some other piece of
   code signals the error.  */
int
current_minor_maps (modeptr, mapptr)
     Lisp_Object **modeptr, **mapptr;
{
  int i = 0;
  Lisp_Object alist, assoc, var, val;

  for (alist = Vminor_mode_map_alist;
       CONSP (alist);
       alist = XCONS (alist)->cdr)
    if ((assoc = XCONS (alist)->car, CONSP (assoc))
	&& (var = XCONS (assoc)->car, SYMBOLP (var))
	&& (val = find_symbol_value (var), ! EQ (val, Qunbound))
	&& ! NILP (val))
      {
	Lisp_Object temp;

	if (i >= cmm_size)
	  {
	    Lisp_Object *newmodes, *newmaps;

	    if (cmm_maps)
	      {
		BLOCK_INPUT;
		cmm_size *= 2;
		newmodes
		  = (Lisp_Object *) realloc (cmm_modes,
					     cmm_size * sizeof (Lisp_Object));
		newmaps
		  = (Lisp_Object *) realloc (cmm_maps,
					     cmm_size * sizeof (Lisp_Object));
		UNBLOCK_INPUT;
	      }
	    else
	      {
		BLOCK_INPUT;
		cmm_size = 30;
		newmodes
		  = (Lisp_Object *) malloc (cmm_size * sizeof (Lisp_Object));
		newmaps
		  = (Lisp_Object *) malloc (cmm_size * sizeof (Lisp_Object));
		UNBLOCK_INPUT;
	      }

	    if (newmaps && newmodes)
	      {
		cmm_modes = newmodes;
		cmm_maps = newmaps;
	      }
	    else
	      break;
	  }

	/* Get the keymap definition--or nil if it is not defined.  */
	temp = internal_condition_case_1 (Findirect_function,
					  XCONS (assoc)->cdr,
					  Qerror, current_minor_maps_error);
	if (!NILP (temp))
	  {
	    cmm_modes[i] = var;
	    cmm_maps [i] = temp;
	    i++;
	  }
      }

  if (modeptr) *modeptr = cmm_modes;
  if (mapptr)  *mapptr  = cmm_maps;
  return i;
}

/* GC is possible in this function if it autoloads a keymap.  */

DEFUN ("key-binding", Fkey_binding, Skey_binding, 1, 2, 0,
  "Return the binding for command KEY in current keymaps.\n\
KEY is a string or vector, a sequence of keystrokes.\n\
The binding is probably a symbol with a function definition.\n\
\n\
Normally, `key-binding' ignores bindings for t, which act as default\n\
bindings, used when nothing else in the keymap applies; this makes it\n\
usable as a general function for probing keymaps.  However, if the\n\
optional second argument ACCEPT-DEFAULT is non-nil, `key-binding' does\n\
recognize the default bindings, just as `read-key-sequence' does.")
  (key, accept_default)
     Lisp_Object key, accept_default;
{
  Lisp_Object *maps, value;
  int nmaps, i;
  struct gcpro gcpro1;

  GCPRO1 (key);

  if (!NILP (current_kboard->Voverriding_terminal_local_map))
    {
      value = Flookup_key (current_kboard->Voverriding_terminal_local_map,
			   key, accept_default);
      if (! NILP (value) && !INTEGERP (value))
	RETURN_UNGCPRO (value);
    }
  else if (!NILP (Voverriding_local_map))
    {
      value = Flookup_key (Voverriding_local_map, key, accept_default);
      if (! NILP (value) && !INTEGERP (value))
	RETURN_UNGCPRO (value);
    }
  else
    { 
      Lisp_Object local;

      nmaps = current_minor_maps (0, &maps);
      /* Note that all these maps are GCPRO'd
	 in the places where we found them.  */

      for (i = 0; i < nmaps; i++)
	if (! NILP (maps[i]))
	  {
	    value = Flookup_key (maps[i], key, accept_default);
	    if (! NILP (value) && !INTEGERP (value))
	      RETURN_UNGCPRO (value);
	  }

      local = get_local_map (PT, current_buffer);

      if (! NILP (local))
	{
	  value = Flookup_key (local, key, accept_default);
	  if (! NILP (value) && !INTEGERP (value))
	    RETURN_UNGCPRO (value);
	}
    }

  value = Flookup_key (current_global_map, key, accept_default);
  UNGCPRO;
  if (! NILP (value) && !INTEGERP (value))
    return value;
  
  return Qnil;
}

/* GC is possible in this function if it autoloads a keymap.  */

DEFUN ("local-key-binding", Flocal_key_binding, Slocal_key_binding, 1, 2, 0,
  "Return the binding for command KEYS in current local keymap only.\n\
KEYS is a string, a sequence of keystrokes.\n\
The binding is probably a symbol with a function definition.\n\
\n\
If optional argument ACCEPT-DEFAULT is non-nil, recognize default\n\
bindings; see the description of `lookup-key' for more details about this.")
  (keys, accept_default)
     Lisp_Object keys, accept_default;
{
  register Lisp_Object map;
  map = current_buffer->keymap;
  if (NILP (map))
    return Qnil;
  return Flookup_key (map, keys, accept_default);
}

/* GC is possible in this function if it autoloads a keymap.  */

DEFUN ("global-key-binding", Fglobal_key_binding, Sglobal_key_binding, 1, 2, 0,
  "Return the binding for command KEYS in current global keymap only.\n\
KEYS is a string, a sequence of keystrokes.\n\
The binding is probably a symbol with a function definition.\n\
This function's return values are the same as those of lookup-key\n\
\(which see).\n\
\n\
If optional argument ACCEPT-DEFAULT is non-nil, recognize default\n\
bindings; see the description of `lookup-key' for more details about this.")
  (keys, accept_default)
     Lisp_Object keys, accept_default;
{
  return Flookup_key (current_global_map, keys, accept_default);
}

/* GC is possible in this function if it autoloads a keymap.  */

DEFUN ("minor-mode-key-binding", Fminor_mode_key_binding, Sminor_mode_key_binding, 1, 2, 0,
  "Find the visible minor mode bindings of KEY.\n\
Return an alist of pairs (MODENAME . BINDING), where MODENAME is the\n\
the symbol which names the minor mode binding KEY, and BINDING is\n\
KEY's definition in that mode.  In particular, if KEY has no\n\
minor-mode bindings, return nil.  If the first binding is a\n\
non-prefix, all subsequent bindings will be omitted, since they would\n\
be ignored.  Similarly, the list doesn't include non-prefix bindings\n\
that come after prefix bindings.\n\
\n\
If optional argument ACCEPT-DEFAULT is non-nil, recognize default\n\
bindings; see the description of `lookup-key' for more details about this.")
  (key, accept_default)
     Lisp_Object key, accept_default;
{
  Lisp_Object *modes, *maps;
  int nmaps;
  Lisp_Object binding;
  int i, j;
  struct gcpro gcpro1, gcpro2;

  nmaps = current_minor_maps (&modes, &maps);
  /* Note that all these maps are GCPRO'd
     in the places where we found them.  */

  binding = Qnil;
  GCPRO2 (key, binding);

  for (i = j = 0; i < nmaps; i++)
    if (! NILP (maps[i])
	&& ! NILP (binding = Flookup_key (maps[i], key, accept_default))
	&& !INTEGERP (binding))
      {
	if (! NILP (get_keymap (binding)))
	  maps[j++] = Fcons (modes[i], binding);
	else if (j == 0)
	  RETURN_UNGCPRO (Fcons (Fcons (modes[i], binding), Qnil));
      }

  UNGCPRO;
  return Flist (j, maps);
}

DEFUN ("define-prefix-command", Fdefine_prefix_command, Sdefine_prefix_command, 1, 2, 0,
  "Define COMMAND as a prefix command.  COMMAND should be a symbol.\n\
A new sparse keymap is stored as COMMAND's function definition and its value.\n\
If a second optional argument MAPVAR is given, the map is stored as\n\
its value instead of as COMMAND's value; but COMMAND is still defined\n\
as a function.")
  (command, mapvar)
     Lisp_Object command, mapvar;
{
  Lisp_Object map;
  map = Fmake_sparse_keymap (Qnil);
  Ffset (command, map);
  if (!NILP (mapvar))
    Fset (mapvar, map);
  else
    Fset (command, map);
  return command;
}

DEFUN ("use-global-map", Fuse_global_map, Suse_global_map, 1, 1, 0,
  "Select KEYMAP as the global keymap.")
  (keymap)
     Lisp_Object keymap;
{
  keymap = get_keymap (keymap);
  current_global_map = keymap;

  return Qnil;
}

DEFUN ("use-local-map", Fuse_local_map, Suse_local_map, 1, 1, 0,
  "Select KEYMAP as the local keymap.\n\
If KEYMAP is nil, that means no local keymap.")
  (keymap)
     Lisp_Object keymap;
{
  if (!NILP (keymap))
    keymap = get_keymap (keymap);

  current_buffer->keymap = keymap;

  return Qnil;
}

DEFUN ("current-local-map", Fcurrent_local_map, Scurrent_local_map, 0, 0, 0,
  "Return current buffer's local keymap, or nil if it has none.")
  ()
{
  return current_buffer->keymap;
}

DEFUN ("current-global-map", Fcurrent_global_map, Scurrent_global_map, 0, 0, 0,
  "Return the current global keymap.")
  ()
{
  return current_global_map;
}

DEFUN ("current-minor-mode-maps", Fcurrent_minor_mode_maps, Scurrent_minor_mode_maps, 0, 0, 0,
  "Return a list of keymaps for the minor modes of the current buffer.")
  ()
{
  Lisp_Object *maps;
  int nmaps = current_minor_maps (0, &maps);

  return Flist (nmaps, maps);
}

/* Help functions for describing and documenting keymaps.		*/

/* This function cannot GC.  */

DEFUN ("accessible-keymaps", Faccessible_keymaps, Saccessible_keymaps,
  1, 2, 0,
  "Find all keymaps accessible via prefix characters from KEYMAP.\n\
Returns a list of elements of the form (KEYS . MAP), where the sequence\n\
KEYS starting from KEYMAP gets you to MAP.  These elements are ordered\n\
so that the KEYS increase in length.  The first element is ([] . KEYMAP).\n\
An optional argument PREFIX, if non-nil, should be a key sequence;\n\
then the value includes only maps for prefixes that start with PREFIX.")
  (keymap, prefix)
     Lisp_Object keymap, prefix;
{
  Lisp_Object maps, good_maps, tail;
  int prefixlen = 0;

  /* no need for gcpro because we don't autoload any keymaps.  */

  if (!NILP (prefix))
    prefixlen = XINT (Flength (prefix));

  if (!NILP (prefix))
    {
      /* If a prefix was specified, start with the keymap (if any) for
	 that prefix, so we don't waste time considering other prefixes.  */
      Lisp_Object tem;
      tem = Flookup_key (keymap, prefix, Qt);
      /* Flookup_key may give us nil, or a number,
	 if the prefix is not defined in this particular map.
	 It might even give us a list that isn't a keymap.  */
      tem = get_keymap_1 (tem, 0, 0);
      if (!NILP (tem))
	maps = Fcons (Fcons (prefix, tem), Qnil);
      else
	return Qnil;
    }
  else
    maps = Fcons (Fcons (Fmake_vector (make_number (0), Qnil),
			 get_keymap (keymap)),
		  Qnil);

  /* For each map in the list maps,
     look at any other maps it points to,
     and stick them at the end if they are not already in the list.

     This is a breadth-first traversal, where tail is the queue of
     nodes, and maps accumulates a list of all nodes visited.  */

  for (tail = maps; CONSP (tail); tail = XCONS (tail)->cdr)
    {
      register Lisp_Object thisseq, thismap;
      Lisp_Object last;
      /* Does the current sequence end in the meta-prefix-char?  */
      int is_metized;

      thisseq = Fcar (Fcar (tail));
      thismap = Fcdr (Fcar (tail));
      last = make_number (XINT (Flength (thisseq)) - 1);
      is_metized = (XINT (last) >= 0
		    && EQ (Faref (thisseq, last), meta_prefix_char));

      for (; CONSP (thismap); thismap = XCONS (thismap)->cdr)
	{
	  Lisp_Object elt;

	  elt = XCONS (thismap)->car;

	  QUIT;

	  if (VECTORP (elt))
	    {
	      register int i;

	      /* Vector keymap.  Scan all the elements.  */
	      for (i = 0; i < XVECTOR (elt)->size; i++)
		{
		  register Lisp_Object tem;
		  register Lisp_Object cmd;

		  cmd = get_keyelt (XVECTOR (elt)->contents[i], 0);
		  if (NILP (cmd)) continue;
		  tem = Fkeymapp (cmd);
		  if (!NILP (tem))
		    {
		      cmd = get_keymap (cmd);
		      /* Ignore keymaps that are already added to maps.  */
		      tem = Frassq (cmd, maps);
		      if (NILP (tem))
			{
			  /* If the last key in thisseq is meta-prefix-char,
			     turn it into a meta-ized keystroke.  We know
			     that the event we're about to append is an
			     ascii keystroke since we're processing a
			     keymap table.  */
			  if (is_metized)
			    {
			      int meta_bit = meta_modifier;
			      tem = Fcopy_sequence (thisseq);
			      
			      Faset (tem, last, make_number (i | meta_bit));
			      
			      /* This new sequence is the same length as
				 thisseq, so stick it in the list right
				 after this one.  */
			      XCONS (tail)->cdr
				= Fcons (Fcons (tem, cmd), XCONS (tail)->cdr);
			    }
			  else
			    {
			      tem = append_key (thisseq, make_number (i));
			      nconc2 (tail, Fcons (Fcons (tem, cmd), Qnil));
			    }
			}
		    }
		}
	    }	    
	  else if (CONSP (elt))
	    {
	      register Lisp_Object cmd, tem, filter;

	      cmd = get_keyelt (XCONS (elt)->cdr, 0);
	      /* Ignore definitions that aren't keymaps themselves.  */
	      tem = Fkeymapp (cmd);
	      if (!NILP (tem))
		{
		  /* Ignore keymaps that have been seen already.  */
		  cmd = get_keymap (cmd);
		  tem = Frassq (cmd, maps);
		  if (NILP (tem))
		    {
		      /* Let elt be the event defined by this map entry.  */
		      elt = XCONS (elt)->car;

		      /* If the last key in thisseq is meta-prefix-char, and
			 this entry is a binding for an ascii keystroke,
			 turn it into a meta-ized keystroke.  */
		      if (is_metized && INTEGERP (elt))
			{
			  tem = Fcopy_sequence (thisseq);
			  Faset (tem, last,
				 make_number (XINT (elt) | meta_modifier));

			  /* This new sequence is the same length as
			     thisseq, so stick it in the list right
			     after this one.  */
			  XCONS (tail)->cdr
			    = Fcons (Fcons (tem, cmd), XCONS (tail)->cdr);
			}
		      else
			nconc2 (tail,
				Fcons (Fcons (append_key (thisseq, elt), cmd),
				       Qnil));
		    }
		}
	    }
	}
    }

  if (NILP (prefix))
    return maps;

  /* Now find just the maps whose access prefixes start with PREFIX.  */

  good_maps = Qnil;
  for (; CONSP (maps); maps = XCONS (maps)->cdr)
    {
      Lisp_Object elt, thisseq;
      elt = XCONS (maps)->car;
      thisseq = XCONS (elt)->car;
      /* The access prefix must be at least as long as PREFIX,
	 and the first elements must match those of PREFIX.  */
      if (XINT (Flength (thisseq)) >= prefixlen)
	{
	  int i;
	  for (i = 0; i < prefixlen; i++)
	    {
	      Lisp_Object i1;
	      XSETFASTINT (i1, i);
	      if (!EQ (Faref (thisseq, i1), Faref (prefix, i1)))
		break;
	    }
	  if (i == prefixlen)
	    good_maps = Fcons (elt, good_maps);
	}
    }

  return Fnreverse (good_maps);
}

Lisp_Object Qsingle_key_description, Qkey_description;

/* This function cannot GC.  */

DEFUN ("key-description", Fkey_description, Skey_description, 1, 1, 0,
  "Return a pretty description of key-sequence KEYS.\n\
Control characters turn into \"C-foo\" sequences, meta into \"M-foo\"\n\
spaces are put between sequence elements, etc.")
  (keys)
     Lisp_Object keys;
{
  int len;
  int i;
  Lisp_Object sep;
  Lisp_Object *args;

  if (STRINGP (keys))
    {
      Lisp_Object vector;
      vector = Fmake_vector (Flength (keys), Qnil);
      for (i = 0; i < XSTRING (keys)->size; i++)
	{
	  if (XSTRING (keys)->data[i] & 0x80)
	    XSETFASTINT (XVECTOR (vector)->contents[i],
			 meta_modifier | (XSTRING (keys)->data[i] & ~0x80));
	  else
	    XSETFASTINT (XVECTOR (vector)->contents[i],
			 XSTRING (keys)->data[i]);
	}
      keys = vector;
    }
  else if (!VECTORP (keys))
    keys = wrong_type_argument (Qarrayp, keys);

  /* In effect, this computes
     (mapconcat 'single-key-description keys " ")
     but we shouldn't use mapconcat because it can do GC.  */

  len = XVECTOR (keys)->size;
  sep = build_string (" ");
  /* This has one extra element at the end that we don't pass to Fconcat.  */
  args = (Lisp_Object *) alloca (len * 2 * sizeof (Lisp_Object));

  for (i = 0; i < len; i++)
    {
      args[i * 2] = Fsingle_key_description (XVECTOR (keys)->contents[i]);
      args[i * 2 + 1] = sep;
    }

  return Fconcat (len * 2 - 1, args);
}

char *
push_key_description (c, p)
     register unsigned int c;
     register char *p;
{
  /* Clear all the meaningless bits above the meta bit.  */
  c &= meta_modifier | ~ - meta_modifier;

  if (c & alt_modifier)
    {
      *p++ = 'A';
      *p++ = '-';
      c -= alt_modifier;
    }
  if (c & ctrl_modifier)
    {
      *p++ = 'C';
      *p++ = '-';
      c -= ctrl_modifier;
    }
  if (c & hyper_modifier)
    {
      *p++ = 'H';
      *p++ = '-';
      c -= hyper_modifier;
    }
  if (c & meta_modifier)
    {
      *p++ = 'M';
      *p++ = '-';
      c -= meta_modifier;
    }
  if (c & shift_modifier)
    {
      *p++ = 'S';
      *p++ = '-';
      c -= shift_modifier;
    }
  if (c & super_modifier)
    {
      *p++ = 's';
      *p++ = '-';
      c -= super_modifier;
    }
  if (c < 040)
    {
      if (c == 033)
	{
	  *p++ = 'E';
	  *p++ = 'S';
	  *p++ = 'C';
	}
      else if (c == '\t')
	{
	  *p++ = 'T';
	  *p++ = 'A';
	  *p++ = 'B';
	}
      else if (c == Ctl('J'))
	{
	  *p++ = 'L';
	  *p++ = 'F';
	  *p++ = 'D';
	}
      else if (c == Ctl('M'))
	{
	  *p++ = 'R';
	  *p++ = 'E';
	  *p++ = 'T';
	}
      else
	{
	  *p++ = 'C';
	  *p++ = '-';
	  if (c > 0 && c <= Ctl ('Z'))
	    *p++ = c + 0140;
	  else
	    *p++ = c + 0100;
	}
    }
  else if (c == 0177)
    {
      *p++ = 'D';
      *p++ = 'E';
      *p++ = 'L';
    }
  else if (c == ' ')
    {
      *p++ = 'S';
      *p++ = 'P';
      *p++ = 'C';
    }
  else if (c < 256)
    *p++ = c;
  else
    {
      *p++ = '\\';
      *p++ = (7 & (c >> 15)) + '0';
      *p++ = (7 & (c >> 12)) + '0';
      *p++ = (7 & (c >> 9)) + '0';
      *p++ = (7 & (c >> 6)) + '0';
      *p++ = (7 & (c >> 3)) + '0';
      *p++ = (7 & (c >> 0)) + '0';
    }

  return p;  
}

/* This function cannot GC.  */

DEFUN ("single-key-description", Fsingle_key_description, Ssingle_key_description, 1, 1, 0,
  "Return a pretty description of command character KEY.\n\
Control characters turn into C-whatever, etc.")
  (key)
     Lisp_Object key;
{
  char tem[20];

  key = EVENT_HEAD (key);

  if (INTEGERP (key))		/* Normal character */
    {
      *push_key_description (XUINT (key), tem) = 0;
      return build_string (tem);
    }
  else if (SYMBOLP (key))	/* Function key or event-symbol */
    return Fsymbol_name (key);
  else if (STRINGP (key))	/* Buffer names in the menubar.  */
    return Fcopy_sequence (key);
  else
    error ("KEY must be an integer, cons, symbol, or string");
}

char *
push_text_char_description (c, p)
     register unsigned int c;
     register char *p;
{
  if (c >= 0200)
    {
      *p++ = 'M';
      *p++ = '-';
      c -= 0200;
    }
  if (c < 040)
    {
      *p++ = '^';
      *p++ = c + 64;		/* 'A' - 1 */
    }
  else if (c == 0177)
    {
      *p++ = '^';
      *p++ = '?';
    }
  else
    *p++ = c;
  return p;  
}

/* This function cannot GC.  */

DEFUN ("text-char-description", Ftext_char_description, Stext_char_description, 1, 1, 0,
  "Return a pretty description of file-character CHARACTER.\n\
Control characters turn into \"^char\", etc.")
  (character)
     Lisp_Object character;
{
  char tem[6];

  CHECK_NUMBER (character, 0);

  *push_text_char_description (XINT (character) & 0377, tem) = 0;

  return build_string (tem);
}

/* Return non-zero if SEQ contains only ASCII characters, perhaps with
   a meta bit.  */
static int
ascii_sequence_p (seq)
     Lisp_Object seq;
{
  int i;
  int len = XINT (Flength (seq));

  for (i = 0; i < len; i++)
    {
      Lisp_Object ii, elt;

      XSETFASTINT (ii, i);
      elt = Faref (seq, ii);

      if (!INTEGERP (elt)
	  || (XUINT (elt) & ~CHAR_META) >= 0x80)
	return 0;
    }

  return 1;
}


/* where-is - finding a command in a set of keymaps.			*/

/* This function can GC if Flookup_key autoloads any keymaps.  */

DEFUN ("where-is-internal", Fwhere_is_internal, Swhere_is_internal, 1, 4, 0,
  "Return list of keys that invoke DEFINITION.\n\
If KEYMAP is non-nil, search only KEYMAP and the global keymap.\n\
If KEYMAP is nil, search all the currently active keymaps.\n\
\n\
If optional 3rd arg FIRSTONLY is non-nil, return the first key sequence found,\n\
rather than a list of all possible key sequences.\n\
If FIRSTONLY is the symbol `non-ascii', return the first binding found,\n\
no matter what it is.\n\
If FIRSTONLY has another non-nil value, prefer sequences of ASCII characters,\n\
and entirely reject menu bindings.\n\
\n\
If optional 4th arg NOINDIRECT is non-nil, don't follow indirections\n\
to other keymaps or slots.  This makes it possible to search for an\n\
indirect definition itself.")
  (definition, keymap, firstonly, noindirect)
     Lisp_Object definition, keymap;
     Lisp_Object firstonly, noindirect;
{
  Lisp_Object maps;
  Lisp_Object found, sequence;
  int keymap_specified = !NILP (keymap);
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
  /* 1 means ignore all menu bindings entirely.  */
  int nomenus = !NILP (firstonly) && !EQ (firstonly, Qnon_ascii);

  if (! keymap_specified)
    {
#ifdef USE_TEXT_PROPERTIES
      keymap = get_local_map (PT, current_buffer);
#else
      keymap = current_buffer->keymap;
#endif
    }

  if (!NILP (keymap))
    maps = nconc2 (Faccessible_keymaps (get_keymap (keymap), Qnil),
		   Faccessible_keymaps (get_keymap (current_global_map),
					Qnil));
  else
    maps = Faccessible_keymaps (get_keymap (current_global_map), Qnil);

  /* Put the minor mode keymaps on the front.  */
  if (! keymap_specified)
    {
      Lisp_Object minors;
      minors = Fnreverse (Fcurrent_minor_mode_maps ());
      while (!NILP (minors))
	{
	  maps = nconc2 (Faccessible_keymaps (get_keymap (XCONS (minors)->car),
					      Qnil),
			 maps);
	  minors = XCONS (minors)->cdr;
	}
    }

  GCPRO5 (definition, keymap, maps, found, sequence);
  found = Qnil;
  sequence = Qnil;

  for (; !NILP (maps); maps = Fcdr (maps))
    {
      /* Key sequence to reach map, and the map that it reaches */
      register Lisp_Object this, map;

      /* If Fcar (map) is a VECTOR, the current element within that vector.  */
      int i = 0;

      /* In order to fold [META-PREFIX-CHAR CHAR] sequences into
	 [M-CHAR] sequences, check if last character of the sequence
	 is the meta-prefix char.  */
      Lisp_Object last;
      int last_is_meta;

      this = Fcar (Fcar (maps));
      map  = Fcdr (Fcar (maps));
      last = make_number (XINT (Flength (this)) - 1);
      last_is_meta = (XINT (last) >= 0
		      && EQ (Faref (this, last), meta_prefix_char));

      QUIT;

      while (CONSP (map))
	{
	  /* Because the code we want to run on each binding is rather
	     large, we don't want to have two separate loop bodies for
	     sparse keymap bindings and tables; we want to iterate one
	     loop body over both keymap and vector bindings.

	     For this reason, if Fcar (map) is a vector, we don't
	     advance map to the next element until i indicates that we
	     have finished off the vector.  */
	  
	  Lisp_Object elt, key, binding;
	  elt = XCONS (map)->car;

	  QUIT;

	  /* Set key and binding to the current key and binding, and
	     advance map and i to the next binding.  */
	  if (VECTORP (elt))
	    {
	      /* In a vector, look at each element.  */
	      binding = XVECTOR (elt)->contents[i];
	      XSETFASTINT (key, i);
	      i++;

	      /* If we've just finished scanning a vector, advance map
		 to the next element, and reset i in anticipation of the
		 next vector we may find.  */
	      if (i >= XVECTOR (elt)->size)
		{
		  map = XCONS (map)->cdr;
		  i = 0;
		}
	    }
	  else if (CONSP (elt))
	    {
	      key = Fcar (Fcar (map));
	      binding = Fcdr (Fcar (map));

	      map = XCONS (map)->cdr;
	    }
	  else
	    /* We want to ignore keymap elements that are neither
	       vectors nor conses.  */
	    {
	      map = XCONS (map)->cdr;
	      continue;
	    }

	  /* Search through indirections unless that's not wanted.  */
	  if (NILP (noindirect))
	    {
	      if (nomenus)
		{
		  while (1)
		    {
		      Lisp_Object map, tem;
		      /* If the contents are (KEYMAP . ELEMENT), go indirect.  */
		      map = get_keymap_1 (Fcar_safe (definition), 0, 0);
		      tem = Fkeymapp (map);
		      if (!NILP (tem))
			definition = access_keymap (map, Fcdr (definition), 0, 0);
		      else
			break;
		    }
		  /* If the contents are (STRING ...), reject.  */
		  if (CONSP (definition)
		      && STRINGP (XCONS (definition)->car))
		    continue;
		}
	      else
		binding = get_keyelt (binding, 0);
	    }

	  /* End this iteration if this element does not match
	     the target.  */

	  if (CONSP (definition))
	    {
	      Lisp_Object tem;
	      tem = Fequal (binding, definition);
	      if (NILP (tem))
		continue;
	    }
	  else
	    if (!EQ (binding, definition))
	      continue;

	  /* We have found a match.
	     Construct the key sequence where we found it.  */
	  if (INTEGERP (key) && last_is_meta)
	    {
	      sequence = Fcopy_sequence (this);
	      Faset (sequence, last, make_number (XINT (key) | meta_modifier));
	    }
	  else
	    sequence = append_key (this, key);

	  /* Verify that this key binding is not shadowed by another
	     binding for the same key, before we say it exists.

	     Mechanism: look for local definition of this key and if
	     it is defined and does not match what we found then
	     ignore this key.

	     Either nil or number as value from Flookup_key
	     means undefined.  */
	  if (keymap_specified)
	    {
	      binding = Flookup_key (keymap, sequence, Qnil);
	      if (!NILP (binding) && !INTEGERP (binding))
		{
		  if (CONSP (definition))
		    {
		      Lisp_Object tem;
		      tem = Fequal (binding, definition);
		      if (NILP (tem))
			continue;
		    }
		  else
		    if (!EQ (binding, definition))
		      continue;
		}
	    }
	  else
	    {
	      binding = Fkey_binding (sequence, Qnil);
	      if (!EQ (binding, definition))
		continue;
	    }

	  /* It is a true unshadowed match.  Record it, unless it's already
	     been seen (as could happen when inheriting keymaps).  */
	  if (NILP (Fmember (sequence, found)))
	    found = Fcons (sequence, found);

	  /* If firstonly is Qnon_ascii, then we can return the first
	     binding we find.  If firstonly is not Qnon_ascii but not
	     nil, then we should return the first ascii-only binding
	     we find.  */
	  if (EQ (firstonly, Qnon_ascii))
	    RETURN_UNGCPRO (sequence);
	  else if (! NILP (firstonly) && ascii_sequence_p (sequence))
	    RETURN_UNGCPRO (sequence);
	}
    }

  UNGCPRO;

  found = Fnreverse (found);

  /* firstonly may have been t, but we may have gone all the way through
     the keymaps without finding an all-ASCII key sequence.  So just
     return the best we could find.  */
  if (! NILP (firstonly))
    return Fcar (found);
    
  return found;
}

/* describe-bindings - summarizing all the bindings in a set of keymaps.  */

DEFUN ("describe-bindings", Fdescribe_bindings, Sdescribe_bindings, 0, 1, "",
  "Show a list of all defined keys, and their definitions.\n\
The list is put in a buffer, which is displayed.\n\
An optional argument PREFIX, if non-nil, should be a key sequence;\n\
then we display only bindings that start with that prefix.")
  (prefix)
     Lisp_Object prefix;
{
  register Lisp_Object thisbuf;
  XSETBUFFER (thisbuf, current_buffer);
  internal_with_output_to_temp_buffer ("*Help*",
				       describe_buffer_bindings,
				       Fcons (thisbuf, prefix));
  return Qnil;
}

/* ARG is (BUFFER . PREFIX).  */

static Lisp_Object
describe_buffer_bindings (arg)
     Lisp_Object arg;
{
  Lisp_Object descbuf, prefix, shadow;
  register Lisp_Object start1;
  struct gcpro gcpro1;

  char *alternate_heading
    = "\
Alternate Characters (use anywhere the nominal character is listed):\n\
nominal         alternate\n\
-------         ---------\n";

  descbuf = XCONS (arg)->car;
  prefix = XCONS (arg)->cdr;
  shadow = Qnil;
  GCPRO1 (shadow);

  Fset_buffer (Vstandard_output);

  /* Report on alternates for keys.  */
  if (STRINGP (Vkeyboard_translate_table) && !NILP (prefix))
    {
      int c;
      unsigned char *translate = XSTRING (Vkeyboard_translate_table)->data;
      int translate_len = XSTRING (Vkeyboard_translate_table)->size;

      for (c = 0; c < translate_len; c++)
	if (translate[c] != c)
	  {
	    char buf[20];
	    char *bufend;

	    if (alternate_heading)
	      {
		insert_string (alternate_heading);
		alternate_heading = 0;
	      }

	    bufend = push_key_description (translate[c], buf);
	    insert (buf, bufend - buf);
	    Findent_to (make_number (16), make_number (1));
	    bufend = push_key_description (c, buf);
	    insert (buf, bufend - buf);

	    insert ("\n", 1);
	  }

      insert ("\n", 1);
    }

  if (!NILP (Vkey_translation_map))
    describe_map_tree (Vkey_translation_map, 0, Qnil, prefix,
		       "Key translations", 0, 1, 0);

  {
    int i, nmaps;
    Lisp_Object *modes, *maps;

    /* Temporarily switch to descbuf, so that we can get that buffer's
       minor modes correctly.  */
    Fset_buffer (descbuf);

    if (!NILP (current_kboard->Voverriding_terminal_local_map)
	|| !NILP (Voverriding_local_map))
      nmaps = 0;
    else
      nmaps = current_minor_maps (&modes, &maps);
    Fset_buffer (Vstandard_output);

    /* Print the minor mode maps.  */
    for (i = 0; i < nmaps; i++)
      {
	/* The title for a minor mode keymap
	   is constructed at run time.
	   We let describe_map_tree do the actual insertion
	   because it takes care of other features when doing so.  */
	char *title, *p;

	if (!SYMBOLP (modes[i]))
	  abort();

	p = title = (char *) alloca (40 + XSYMBOL (modes[i])->name->size);
	*p++ = '`';
	bcopy (XSYMBOL (modes[i])->name->data, p,
	       XSYMBOL (modes[i])->name->size);
	p += XSYMBOL (modes[i])->name->size;
	*p++ = '\'';
	bcopy (" Minor Mode Bindings", p, sizeof (" Minor Mode Bindings") - 1);
	p += sizeof (" Minor Mode Bindings") - 1;
	*p = 0;

	describe_map_tree (maps[i], 1, shadow, prefix, title, 0, 0, 0);
	shadow = Fcons (maps[i], shadow);
      }
  }

  /* Print the (major mode) local map.  */
  if (!NILP (current_kboard->Voverriding_terminal_local_map))
    start1 = current_kboard->Voverriding_terminal_local_map;
  else if (!NILP (Voverriding_local_map))
    start1 = Voverriding_local_map;
  else
    start1 = XBUFFER (descbuf)->keymap;

  if (!NILP (start1))
    {
      describe_map_tree (start1, 1, shadow, prefix,
			 "Major Mode Bindings", 0, 0, 0);
      shadow = Fcons (start1, shadow);
    }

  describe_map_tree (current_global_map, 1, shadow, prefix,
		     "Global Bindings", 0, 0, 1);

  /* Print the function-key-map translations under this prefix.  */
  if (!NILP (Vfunction_key_map))
    describe_map_tree (Vfunction_key_map, 0, Qnil, prefix,
		       "Function key map translations", 0, 1, 0);

  call0 (intern ("help-mode"));
  Fset_buffer (descbuf);
  UNGCPRO;
  return Qnil;
}

/* Insert a description of the key bindings in STARTMAP,
    followed by those of all maps reachable through STARTMAP.
   If PARTIAL is nonzero, omit certain "uninteresting" commands
    (such as `undefined').
   If SHADOW is non-nil, it is a list of maps;
    don't mention keys which would be shadowed by any of them.
   PREFIX, if non-nil, says mention only keys that start with PREFIX.
   TITLE, if not 0, is a string to insert at the beginning.
   TITLE should not end with a colon or a newline; we supply that.
   If NOMENU is not 0, then omit menu-bar commands.

   If TRANSL is nonzero, the definitions are actually key translations
   so print strings and vectors differently.

   If ALWAYS_TITLE is nonzero, print the title even if there are no maps
   to look through.  */

void
describe_map_tree (startmap, partial, shadow, prefix, title, nomenu, transl,
		   always_title)
     Lisp_Object startmap, shadow, prefix;
     int partial;
     char *title;
     int nomenu;
     int transl;
     int always_title;
{
  Lisp_Object maps, seen, sub_shadows;
  struct gcpro gcpro1, gcpro2, gcpro3;
  int something = 0;
  char *key_heading
    = "\
key             binding\n\
---             -------\n";

  maps = Faccessible_keymaps (startmap, prefix);
  seen = Qnil;
  sub_shadows = Qnil;
  GCPRO3 (maps, seen, sub_shadows);

  if (nomenu)
    {
      Lisp_Object list;

      /* Delete from MAPS each element that is for the menu bar.  */
      for (list = maps; !NILP (list); list = XCONS (list)->cdr)
	{
	  Lisp_Object elt, prefix, tem;

	  elt = Fcar (list);
	  prefix = Fcar (elt);
	  if (XVECTOR (prefix)->size >= 1)
	    {
	      tem = Faref (prefix, make_number (0));
	      if (EQ (tem, Qmenu_bar))
		maps = Fdelq (elt, maps);
	    }
	}
    }

  if (!NILP (maps) || always_title)
    {
      if (title)
	{
	  insert_string (title);
	  if (!NILP (prefix))
	    {
	      insert_string (" Starting With ");
	      insert1 (Fkey_description (prefix));
	    }
	  insert_string (":\n");
	}
      insert_string (key_heading);
      something = 1;
    }

  for (; !NILP (maps); maps = Fcdr (maps))
    {
      register Lisp_Object elt, prefix, tail;

      elt = Fcar (maps);
      prefix = Fcar (elt);

      sub_shadows = Qnil;

      for (tail = shadow; CONSP (tail); tail = XCONS (tail)->cdr)
	{
	  Lisp_Object shmap;

	  shmap = XCONS (tail)->car;

	  /* If the sequence by which we reach this keymap is zero-length,
	     then the shadow map for this keymap is just SHADOW.  */
	  if ((STRINGP (prefix) && XSTRING (prefix)->size == 0)
	      || (VECTORP (prefix) && XVECTOR (prefix)->size == 0))
	    ;
	  /* If the sequence by which we reach this keymap actually has
	     some elements, then the sequence's definition in SHADOW is
	     what we should use.  */
	  else
	    {
	      shmap = Flookup_key (shmap, Fcar (elt), Qt);
	      if (INTEGERP (shmap))
		shmap = Qnil;
	    }

	  /* If shmap is not nil and not a keymap,
	     it completely shadows this map, so don't
	     describe this map at all.  */
	  if (!NILP (shmap) && NILP (Fkeymapp (shmap)))
	    goto skip;

	  if (!NILP (shmap))
	    sub_shadows = Fcons (shmap, sub_shadows);
	}

      describe_map (Fcdr (elt), Fcar (elt),
		    transl ? describe_translation : describe_command,
		    partial, sub_shadows, &seen, nomenu);

    skip: ;
    }

  if (something)
    insert_string ("\n");

  UNGCPRO;
}

static int previous_description_column;

static void
describe_command (definition)
     Lisp_Object definition;
{
  register Lisp_Object tem1;
  int column = current_column ();
  int description_column;

  /* If column 16 is no good, go to col 32;
     but don't push beyond that--go to next line instead.  */
  if (column > 30)
    {
      insert_char ('\n');
      description_column = 32;
    }
  else if (column > 14 || (column > 10 && previous_description_column == 32))
    description_column = 32;
  else
    description_column = 16;

  Findent_to (make_number (description_column), make_number (1));
  previous_description_column = description_column;

  if (SYMBOLP (definition))
    {
      XSETSTRING (tem1, XSYMBOL (definition)->name);
      insert1 (tem1);
      insert_string ("\n");
    }
  else if (STRINGP (definition) || VECTORP (definition))
    insert_string ("Keyboard Macro\n");
  else
    {
      tem1 = Fkeymapp (definition);
      if (!NILP (tem1))
	insert_string ("Prefix Command\n");
      else
	insert_string ("??\n");
    }
}

static void
describe_translation (definition)
     Lisp_Object definition;
{
  register Lisp_Object tem1;

  Findent_to (make_number (16), make_number (1));

  if (SYMBOLP (definition))
    {
      XSETSTRING (tem1, XSYMBOL (definition)->name);
      insert1 (tem1);
      insert_string ("\n");
    }
  else if (STRINGP (definition) || VECTORP (definition))
    {
      insert1 (Fkey_description (definition));
      insert_string ("\n");
    }
  else
    {
      tem1 = Fkeymapp (definition);
      if (!NILP (tem1))
	insert_string ("Prefix Command\n");
      else
	insert_string ("??\n");
    }
}

/* Like Flookup_key, but uses a list of keymaps SHADOW instead of a single map.
   Returns the first non-nil binding found in any of those maps.  */

static Lisp_Object
shadow_lookup (shadow, key, flag)
     Lisp_Object shadow, key, flag;
{
  Lisp_Object tail, value;

  for (tail = shadow; CONSP (tail); tail = XCONS (tail)->cdr)
    {
      value = Flookup_key (XCONS (tail)->car, key, flag);
      if (!NILP (value))
	return value;
    }
  return Qnil;
}

/* Describe the contents of map MAP, assuming that this map itself is
   reached by the sequence of prefix keys KEYS (a string or vector).
   PARTIAL, SHADOW, NOMENU are as in `describe_map_tree' above.  */

static void
describe_map (map, keys, elt_describer, partial, shadow, seen, nomenu)
     register Lisp_Object map;
     Lisp_Object keys;
     int (*elt_describer) ();
     int partial;
     Lisp_Object shadow;
     Lisp_Object *seen;
     int nomenu;
{
  Lisp_Object elt_prefix;
  Lisp_Object tail, definition, event;
  Lisp_Object tem;
  Lisp_Object suppress;
  Lisp_Object kludge;
  int first = 1;
  struct gcpro gcpro1, gcpro2, gcpro3;

  if (!NILP (keys) && XFASTINT (Flength (keys)) > 0)
    {
      /* Call Fkey_description first, to avoid GC bug for the other string.  */
      tem = Fkey_description (keys);
      elt_prefix = concat2 (tem, build_string (" "));
    }
  else
    elt_prefix = Qnil;

  if (partial)
    suppress = intern ("suppress-keymap");

  /* This vector gets used to present single keys to Flookup_key.  Since
     that is done once per keymap element, we don't want to cons up a
     fresh vector every time.  */
  kludge = Fmake_vector (make_number (1), Qnil);
  definition = Qnil;

  GCPRO3 (elt_prefix, definition, kludge);

  for (tail = map; CONSP (tail); tail = XCONS (tail)->cdr)
    {
      QUIT;

      if (VECTORP (XCONS (tail)->car))
	describe_vector (XCONS (tail)->car,
			 elt_prefix, elt_describer, partial, shadow, map);
      else if (CONSP (XCONS (tail)->car))
	{
	  event = XCONS (XCONS (tail)->car)->car;

	  /* Ignore bindings whose "keys" are not really valid events.
	     (We get these in the frames and buffers menu.)  */
	  if (! (SYMBOLP (event) || INTEGERP (event)))
	    continue;

	  if (nomenu && EQ (event, Qmenu_bar))
	    continue;

	  definition = get_keyelt (XCONS (XCONS (tail)->car)->cdr, 0);

	  /* Don't show undefined commands or suppressed commands.  */
	  if (NILP (definition)) continue;
	  if (SYMBOLP (definition) && partial)
	    {
	      tem = Fget (definition, suppress);
	      if (!NILP (tem))
		continue;
	    }

	  /* Don't show a command that isn't really visible
	     because a local definition of the same key shadows it.  */

	  XVECTOR (kludge)->contents[0] = event;
	  if (!NILP (shadow))
	    {
	      tem = shadow_lookup (shadow, kludge, Qt);
	      if (!NILP (tem)) continue;
	    }

	  tem = Flookup_key (map, kludge, Qt);
	  if (! EQ (tem, definition)) continue;

	  if (first)
	    {
	      previous_description_column = 0;
	      insert ("\n", 1);
	      first = 0;
	    }

	  if (!NILP (elt_prefix))
	    insert1 (elt_prefix);

	  /* THIS gets the string to describe the character EVENT.  */
	  insert1 (Fsingle_key_description (event));

	  /* Print a description of the definition of this character.
	     elt_describer will take care of spacing out far enough
	     for alignment purposes.  */
	  (*elt_describer) (definition);
	}
      else if (EQ (XCONS (tail)->car, Qkeymap))
	{
	  /* The same keymap might be in the structure twice, if we're
	     using an inherited keymap.  So skip anything we've already
	     encountered.  */
	  tem = Fassq (tail, *seen);
	  if (CONSP (tem) && !NILP (Fequal (XCONS (tem)->car, keys)))
	    break;
	  *seen = Fcons (Fcons (tail, keys), *seen);
	}
    }

  UNGCPRO;
}

static int
describe_vector_princ (elt)
     Lisp_Object elt;
{
  Findent_to (make_number (16), make_number (1));
  Fprinc (elt, Qnil);
  Fterpri (Qnil);
}

DEFUN ("describe-vector", Fdescribe_vector, Sdescribe_vector, 1, 1, 0,
  "Insert a description of contents of VECTOR.\n\
This is text showing the elements of vector matched against indices.")
  (vector)
     Lisp_Object vector;
{
  int count = specpdl_ptr - specpdl;

  specbind (Qstandard_output, Fcurrent_buffer ());
  CHECK_VECTOR_OR_CHAR_TABLE (vector, 0);
  describe_vector (vector, Qnil, describe_vector_princ, 0, Qnil, Qnil);

  return unbind_to (count, Qnil);
}

/* Insert in the current buffer a description of the contents of VECTOR.
   We call ELT_DESCRIBER to insert the description of one value found
   in VECTOR.

   ELT_PREFIX describes what "comes before" the keys or indices defined
   by this vector.

   If the vector is in a keymap, ELT_PREFIX is a prefix key which
   leads to this keymap.

   If the vector is a chartable, ELT_PREFIX is the vector
   of bytes that lead to the character set or portion of a character
   set described by this chartable.

   If PARTIAL is nonzero, it means do not mention suppressed commands
   (that assumes the vector is in a keymap).

   SHADOW is a list of keymaps that shadow this map.
   If it is non-nil, then we look up the key in those maps
   and we don't mention it now if it is defined by any of them.

   ENTIRE_MAP is the keymap in which this vector appears.
   If the definition in effect in the whole map does not match
   the one in this vector, we ignore this one.  */

describe_vector (vector, elt_prefix, elt_describer,
		 partial, shadow, entire_map)
     register Lisp_Object vector;
     Lisp_Object elt_prefix;
     int (*elt_describer) ();
     int partial;
     Lisp_Object shadow;
     Lisp_Object entire_map;
{
  Lisp_Object this;
  Lisp_Object dummy;
  Lisp_Object definition;
  Lisp_Object tem2;
  register int i;
  Lisp_Object suppress;
  Lisp_Object kludge;
  Lisp_Object chartable_kludge;
  int first = 1;
  int size;
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;

  definition = Qnil;
  chartable_kludge = Qnil;

  /* This vector gets used to present single keys to Flookup_key.  Since
     that is done once per vector element, we don't want to cons up a
     fresh vector every time.  */
  kludge = Fmake_vector (make_number (1), Qnil);
  GCPRO4 (elt_prefix, definition, kludge, chartable_kludge);

  if (partial)
    suppress = intern ("suppress-keymap");

  /* This does the right thing for char-tables as well as ordinary vectors.  */
  size = XFASTINT (Flength (vector));

  for (i = 0; i < size; i++)
    {
      QUIT;
      definition = get_keyelt (XVECTOR (vector)->contents[i], 0);

      if (NILP (definition)) continue;      

      /* Don't mention suppressed commands.  */
      if (SYMBOLP (definition) && partial)
	{
	  this = Fget (definition, suppress);
	  if (!NILP (this))
	    continue;
	}

      /* If this binding is shadowed by some other map, ignore it.  */
      if (!NILP (shadow))
	{
	  Lisp_Object tem;
	  
	  XVECTOR (kludge)->contents[0] = make_number (i);
	  tem = shadow_lookup (shadow, kludge, Qt);

	  if (!NILP (tem)) continue;
	}

      /* Ignore this definition if it is shadowed by an earlier
	 one in the same keymap.  */
      if (!NILP (entire_map))
	{
	  Lisp_Object tem;

	  XVECTOR (kludge)->contents[0] = make_number (i);
	  tem = Flookup_key (entire_map, kludge, Qt);

	  if (! EQ (tem, definition))
	    continue;
	}

      /* If we find a char-table within a char-table,
	 scan it recursively; it defines the details for
	 a character set or a portion of a character set.  */
      if (CHAR_TABLE_P (vector) && CHAR_TABLE_P (definition))
	{
	  int outer_level
	    = !NILP (elt_prefix) ? XVECTOR (elt_prefix)->size : 0;
	  if (NILP (chartable_kludge))
	    {
	      chartable_kludge
		= Fmake_vector (make_number (outer_level + 1), Qnil);
	      if (outer_level != 0)
		bcopy (XVECTOR (elt_prefix)->contents,
		       XVECTOR (chartable_kludge)->contents,
		       outer_level * sizeof (Lisp_Object));
	    }
	  XVECTOR (chartable_kludge)->contents[outer_level]
	    = make_number (i);
	  describe_vector (definition, chartable_kludge, elt_describer,
			   partial, shadow, entire_map);
	  continue;
	}

      if (first)
	{
	  insert ("\n", 1);
	  first = 0;
	}

      if (CHAR_TABLE_P (vector))
	{
	  if (!NILP (elt_prefix))
	    {
	      /* Must combine elt_prefix with i to produce a character
		 code, then insert that character's description.  */
	    }
	  else
	    {
	      /* Get the string to describe the character I, and print it.  */
	      XSETFASTINT (dummy, i);

	      /* THIS gets the string to describe the character DUMMY.  */
	      this = Fsingle_key_description (dummy);
	      insert1 (this);
	    }
	}
      else
	{
	  /* Output the prefix that applies to every entry in this map.  */
	  if (!NILP (elt_prefix))
	    insert1 (elt_prefix);

	  /* Get the string to describe the character I, and print it.  */
	  XSETFASTINT (dummy, i);

	  /* THIS gets the string to describe the character DUMMY.  */
	  this = Fsingle_key_description (dummy);
	  insert1 (this);
	}

      /* Find all consecutive characters that have the same definition.  */
      while (i + 1 < XVECTOR (vector)->size
	     && (tem2 = get_keyelt (XVECTOR (vector)->contents[i+1], 0),
		 EQ (tem2, definition)))
	i++;

      /* If we have a range of more than one character,
	 print where the range reaches to.  */

      if (i != XINT (dummy))
	{
	  insert (" .. ", 4);
	  if (CHAR_TABLE_P (vector))
	    {
	      if (!NILP (elt_prefix))
		{
		  /* Must combine elt_prefix with i to produce a character
		     code, then insert that character's description.  */
		}
	      else
		{
		  XSETFASTINT (dummy, i);

		  this = Fsingle_key_description (dummy);
		  insert1 (this);
		}
	    }
	  else
	    {
	      if (!NILP (elt_prefix))
		insert1 (elt_prefix);

	      XSETFASTINT (dummy, i);
	      insert1 (Fsingle_key_description (dummy));
	    }
	}

      /* Print a description of the definition of this character.
	 elt_describer will take care of spacing out far enough
	 for alignment purposes.  */
      (*elt_describer) (definition);
    }

  UNGCPRO;
}

/* Apropos - finding all symbols whose names match a regexp.		*/
Lisp_Object apropos_predicate;
Lisp_Object apropos_accumulate;

static void
apropos_accum (symbol, string)
     Lisp_Object symbol, string;
{
  register Lisp_Object tem;

  tem = Fstring_match (string, Fsymbol_name (symbol), Qnil);
  if (!NILP (tem) && !NILP (apropos_predicate))
    tem = call1 (apropos_predicate, symbol);
  if (!NILP (tem))
    apropos_accumulate = Fcons (symbol, apropos_accumulate);
}

DEFUN ("apropos-internal", Fapropos_internal, Sapropos_internal, 1, 2, 0, 
  "Show all symbols whose names contain match for REGEXP.\n\
If optional 2nd arg PREDICATE is non-nil, (funcall PREDICATE SYMBOL) is done\n\
for each symbol and a symbol is mentioned only if that returns non-nil.\n\
Return list of symbols found.")
  (regexp, predicate)
     Lisp_Object regexp, predicate;
{
  struct gcpro gcpro1, gcpro2;
  CHECK_STRING (regexp, 0);
  apropos_predicate = predicate;
  GCPRO2 (apropos_predicate, apropos_accumulate);
  apropos_accumulate = Qnil;
  map_obarray (Vobarray, apropos_accum, regexp);
  apropos_accumulate = Fsort (apropos_accumulate, Qstring_lessp);
  UNGCPRO;
  return apropos_accumulate;
}

syms_of_keymap ()
{
  Lisp_Object tem;

  Qkeymap = intern ("keymap");
  staticpro (&Qkeymap);

/* Initialize the keymaps standardly used.
   Each one is the value of a Lisp variable, and is also
   pointed to by a C variable */

  global_map = Fcons (Qkeymap,
		      Fcons (Fmake_vector (make_number (0400), Qnil), Qnil));
  Fset (intern ("global-map"), global_map);

  current_global_map = global_map;
  staticpro (&global_map);
  staticpro (&current_global_map);

  meta_map = Fmake_keymap (Qnil);
  Fset (intern ("esc-map"), meta_map);
  Ffset (intern ("ESC-prefix"), meta_map);

  control_x_map = Fmake_keymap (Qnil);
  Fset (intern ("ctl-x-map"), control_x_map);
  Ffset (intern ("Control-X-prefix"), control_x_map);

  DEFVAR_LISP ("define-key-rebound-commands", &Vdefine_key_rebound_commands,
    "List of commands given new key bindings recently.\n\
This is used for internal purposes during Emacs startup;\n\
don't alter it yourself.");
  Vdefine_key_rebound_commands = Qt;

  DEFVAR_LISP ("minibuffer-local-map", &Vminibuffer_local_map,
    "Default keymap to use when reading from the minibuffer.");
  Vminibuffer_local_map = Fmake_sparse_keymap (Qnil);

  DEFVAR_LISP ("minibuffer-local-ns-map", &Vminibuffer_local_ns_map,
    "Local keymap for the minibuffer when spaces are not allowed.");
  Vminibuffer_local_ns_map = Fmake_sparse_keymap (Qnil);

  DEFVAR_LISP ("minibuffer-local-completion-map", &Vminibuffer_local_completion_map,
    "Local keymap for minibuffer input with completion.");
  Vminibuffer_local_completion_map = Fmake_sparse_keymap (Qnil);

  DEFVAR_LISP ("minibuffer-local-must-match-map", &Vminibuffer_local_must_match_map,
    "Local keymap for minibuffer input with completion, for exact match.");
  Vminibuffer_local_must_match_map = Fmake_sparse_keymap (Qnil);

  DEFVAR_LISP ("minor-mode-map-alist", &Vminor_mode_map_alist,
    "Alist of keymaps to use for minor modes.\n\
Each element looks like (VARIABLE . KEYMAP); KEYMAP is used to read\n\
key sequences and look up bindings iff VARIABLE's value is non-nil.\n\
If two active keymaps bind the same key, the keymap appearing earlier\n\
in the list takes precedence.");
  Vminor_mode_map_alist = Qnil;

  DEFVAR_LISP ("function-key-map", &Vfunction_key_map,
  "Keymap mapping ASCII function key sequences onto their preferred forms.\n\
This allows Emacs to recognize function keys sent from ASCII\n\
terminals at any point in a key sequence.\n\
\n\
The `read-key-sequence' function replaces any subsequence bound by\n\
`function-key-map' with its binding.  More precisely, when the active\n\
keymaps have no binding for the current key sequence but\n\
`function-key-map' binds a suffix of the sequence to a vector or string,\n\
`read-key-sequence' replaces the matching suffix with its binding, and\n\
continues with the new sequence.\n\
\n\
The events that come from bindings in `function-key-map' are not\n\
themselves looked up in `function-key-map'.\n\
\n\
For example, suppose `function-key-map' binds `ESC O P' to [f1].\n\
Typing `ESC O P' to `read-key-sequence' would return [f1].  Typing\n\
`C-x ESC O P' would return [?\\C-x f1].  If [f1] were a prefix\n\
key, typing `ESC O P x' would return [f1 x].");
  Vfunction_key_map = Fmake_sparse_keymap (Qnil);

  DEFVAR_LISP ("key-translation-map", &Vkey_translation_map,
    "Keymap of key translations that can override keymaps.\n\
This keymap works like `function-key-map', but comes after that,\n\
and applies even for keys that have ordinary bindings.");
  Vkey_translation_map = Qnil;

  Qsingle_key_description = intern ("single-key-description");
  staticpro (&Qsingle_key_description);

  Qkey_description = intern ("key-description");
  staticpro (&Qkey_description);

  Qkeymapp = intern ("keymapp");
  staticpro (&Qkeymapp);

  Qnon_ascii = intern ("non-ascii");
  staticpro (&Qnon_ascii);

  defsubr (&Skeymapp);
  defsubr (&Skeymap_parent);
  defsubr (&Sset_keymap_parent);
  defsubr (&Smake_keymap);
  defsubr (&Smake_sparse_keymap);
  defsubr (&Scopy_keymap);
  defsubr (&Skey_binding);
  defsubr (&Slocal_key_binding);
  defsubr (&Sglobal_key_binding);
  defsubr (&Sminor_mode_key_binding);
  defsubr (&Sdefine_key);
  defsubr (&Slookup_key);
  defsubr (&Sdefine_prefix_command);
  defsubr (&Suse_global_map);
  defsubr (&Suse_local_map);
  defsubr (&Scurrent_local_map);
  defsubr (&Scurrent_global_map);
  defsubr (&Scurrent_minor_mode_maps);
  defsubr (&Saccessible_keymaps);
  defsubr (&Skey_description);
  defsubr (&Sdescribe_vector);
  defsubr (&Ssingle_key_description);
  defsubr (&Stext_char_description);
  defsubr (&Swhere_is_internal);
  defsubr (&Sdescribe_bindings);
  defsubr (&Sapropos_internal);
}

keys_of_keymap ()
{
  Lisp_Object tem;

  initial_define_key (global_map, 033, "ESC-prefix");
  initial_define_key (global_map, Ctl('X'), "Control-X-prefix");
}
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.