Source

emacs / src / minibuf.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
/* Minibuffer input and completion.
   Copyright (C) 1985, 1986, 93, 94, 95, 1996 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 "lisp.h"
#include "commands.h"
#include "buffer.h"
#include "dispextern.h"
#include "frame.h"
#include "window.h"
#include "syntax.h"
#include "keyboard.h"

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

extern int quit_char;

/* List of buffers for use as minibuffers.
   The first element of the list is used for the outermost minibuffer
   invocation, the next element is used for a recursive minibuffer
   invocation, etc.  The list is extended at the end as deeper
   minibuffer recursions are encountered.  */
Lisp_Object Vminibuffer_list;

/* Data to remember during recursive minibuffer invocations  */
Lisp_Object minibuf_save_list;

/* Depth in minibuffer invocations.  */
int minibuf_level;

/* Nonzero means display completion help for invalid input */
int auto_help;

/* Fread_minibuffer leaves the input here as a string. */
Lisp_Object last_minibuf_string;

/* Nonzero means let functions called when within a minibuffer 
   invoke recursive minibuffers (to read arguments, or whatever) */
int enable_recursive_minibuffers;

/* help-form is bound to this while in the minibuffer.  */

Lisp_Object Vminibuffer_help_form;

/* Variable which is the history list to add minibuffer values to.  */

Lisp_Object Vminibuffer_history_variable;

/* Current position in the history list (adjusted by M-n and M-p).  */

Lisp_Object Vminibuffer_history_position;

Lisp_Object Qminibuffer_history;

Lisp_Object Qread_file_name_internal;

/* Normal hooks for entry to and exit from minibuffer.  */

Lisp_Object Qminibuffer_setup_hook, Vminibuffer_setup_hook;
Lisp_Object Qminibuffer_exit_hook, Vminibuffer_exit_hook;

/* Nonzero means completion ignores case.  */

int completion_ignore_case;

/* List of regexps that should restrict possible completions.  */

Lisp_Object Vcompletion_regexp_list;

/* Nonzero means raise the minibuffer frame when the minibuffer
   is entered.  */

int minibuffer_auto_raise;

/* If last completion attempt reported "Complete but not unique"
   then this is the string completed then; otherwise this is nil.  */

static Lisp_Object last_exact_completion;

Lisp_Object Quser_variable_p;

/* Non-nil means it is the window for C-M-v to scroll
   when the minibuffer is selected.  */
extern Lisp_Object Vminibuf_scroll_window;

extern Lisp_Object Voverriding_local_map;

/* Put minibuf on currently selected frame's minibuffer.
   We do this whenever the user starts a new minibuffer
   or when a minibuffer exits.  */

void
choose_minibuf_frame ()
{
  if (selected_frame != 0
      && !EQ (minibuf_window, selected_frame->minibuffer_window))
    {
#if defined(MSDOS) && !defined(HAVE_X_WINDOWS)
      selected_frame->minibuffer_window = minibuf_window;
#else
      /* I don't think that any frames may validly have a null minibuffer
	 window anymore.  */
      if (NILP (selected_frame->minibuffer_window))
	abort ();

      Fset_window_buffer (selected_frame->minibuffer_window,
			  XWINDOW (minibuf_window)->buffer);
      minibuf_window = selected_frame->minibuffer_window;
#endif
    }
}

DEFUN ("set-minibuffer-window", Fset_minibuffer_window,
       Sset_minibuffer_window, 1, 1, 0,
  "Specify which minibuffer window to use for the minibuffer.\n\
This effects where the minibuffer is displayed if you put text in it\n\
without invoking the usual minibuffer commands.")
  (window)
     Lisp_Object window;
{
  CHECK_WINDOW (window, 1);
  if (! MINI_WINDOW_P (XWINDOW (window)))
    error ("Window is not a minibuffer window");

  minibuf_window = window;

  return window;
}


/* Actual minibuffer invocation. */

void read_minibuf_unwind ();
Lisp_Object get_minibuffer ();
Lisp_Object read_minibuf ();

/* Read from the minibuffer using keymap MAP, initial contents INITIAL
   (a string), putting point minus BACKUP_N chars from the end of INITIAL,
   prompting with PROMPT (a string), using history list HISTVAR
   with initial position HISTPOS.  (BACKUP_N should be <= 0.)

   Normally return the result as a string (the text that was read),
   but if EXPFLAG is nonzero, read it and return the object read.
   If HISTVAR is given, save the value read on that history only if it doesn't
   match the front of that history list exactly.  The value is pushed onto
   the list as the string that was read.  */

Lisp_Object
read_minibuf (map, initial, prompt, backup_n, expflag, histvar, histpos)
     Lisp_Object map;
     Lisp_Object initial;
     Lisp_Object prompt;
     Lisp_Object backup_n;
     int expflag;
     Lisp_Object histvar;
     Lisp_Object histpos;
{
  Lisp_Object val;
  int count = specpdl_ptr - specpdl;
  Lisp_Object mini_frame;
  struct gcpro gcpro1, gcpro2, gcpro3;

  single_kboard_state ();

  val = Qnil;
  /* Don't need to protect PROMPT, HISTVAR, and HISTPOS because we
     store them away before we can GC.  Don't need to protect
     BACKUP_N because we use the value only if it is an integer.  */
  GCPRO3 (map, initial, val);

  if (!STRINGP (prompt))
    prompt = build_string ("");

  if (!enable_recursive_minibuffers
      && minibuf_level > 0
      && (EQ (selected_window, minibuf_window)))
    error ("Command attempted to use minibuffer while in minibuffer");

  /* Could we simply bind these variables instead?  */
  minibuf_save_list
    = Fcons (Voverriding_local_map,
	     Fcons (minibuf_window, minibuf_save_list));
  minibuf_save_list
    = Fcons (minibuf_prompt,
	     Fcons (make_number (minibuf_prompt_width),
		    Fcons (Vhelp_form,
			   Fcons (Vcurrent_prefix_arg,
				  Fcons (Vminibuffer_history_position,
					 Fcons (Vminibuffer_history_variable,
						minibuf_save_list))))));

  minibuf_prompt_width = 0;	/* xdisp.c puts in the right value.  */
  minibuf_prompt = Fcopy_sequence (prompt);
  Vminibuffer_history_position = histpos;
  Vminibuffer_history_variable = histvar;

  choose_minibuf_frame ();

  record_unwind_protect (Fset_window_configuration,
			 Fcurrent_window_configuration (Qnil));

  /* If the minibuffer window is on a different frame, save that
     frame's configuration too.  */
#ifdef MULTI_FRAME
  mini_frame = WINDOW_FRAME (XWINDOW (minibuf_window));
  if (XFRAME (mini_frame) != selected_frame)
    record_unwind_protect (Fset_window_configuration,
			   Fcurrent_window_configuration (mini_frame));

  /* If the minibuffer is on an iconified or invisible frame,
     make it visible now.  */
  Fmake_frame_visible (mini_frame);

  if (minibuffer_auto_raise)
    Fraise_frame (mini_frame);
#endif

  val = current_buffer->directory;
  Fset_buffer (get_minibuffer (minibuf_level));

  /* The current buffer's default directory is usually the right thing
     for our minibuffer here.  However, if you're typing a command at
     a minibuffer-only frame when minibuf_level is zero, then buf IS
     the current_buffer, so reset_buffer leaves buf's default
     directory unchanged.  This is a bummer when you've just started
     up Emacs and buf's default directory is Qnil.  Here's a hack; can
     you think of something better to do?  Find another buffer with a
     better directory, and use that one instead.  */
  if (STRINGP (val))
    current_buffer->directory = val;
  else
    {
      Lisp_Object buf_list;

      for (buf_list = Vbuffer_alist;
	   CONSP (buf_list);
	   buf_list = XCONS (buf_list)->cdr)
	{
	  Lisp_Object other_buf;

	  other_buf = XCONS (XCONS (buf_list)->car)->cdr;
	  if (STRINGP (XBUFFER (other_buf)->directory))
	    {
	      current_buffer->directory = XBUFFER (other_buf)->directory;
	      break;
	    }
	}
    }

#ifdef MULTI_FRAME
  if (XFRAME (mini_frame) != selected_frame)
    Fredirect_frame_focus (Fselected_frame (), mini_frame);
#endif
  Fmake_local_variable (Qprint_escape_newlines);
  print_escape_newlines = 1;

  record_unwind_protect (read_minibuf_unwind, Qnil);

  Vminibuf_scroll_window = selected_window;
  Fset_window_buffer (minibuf_window, Fcurrent_buffer ());
  Fselect_window (minibuf_window);
  XSETFASTINT (XWINDOW (minibuf_window)->hscroll, 0);

  {
    int count1 = specpdl_ptr - specpdl;
    specbind (Qinhibit_read_only, Qt);
    Ferase_buffer ();
    unbind_to (count1, Qnil);
  }

  minibuf_level++;

  if (!NILP (initial))
    {
      Finsert (1, &initial);
      if (!NILP (backup_n) && INTEGERP (backup_n))
	Fforward_char (backup_n);
    }

  echo_area_glyphs = 0;
  /* This is in case the minibuffer-setup-hook calls Fsit_for.  */
  previous_echo_glyphs = 0;

  Vhelp_form = Vminibuffer_help_form;
  current_buffer->keymap = map;

  /* Run our hook, but not if it is empty.
     (run-hooks would do nothing if it is empty,
     but it's important to save time here in the usual case.  */
  if (!NILP (Vminibuffer_setup_hook) && !EQ (Vminibuffer_setup_hook, Qunbound)
      && !NILP (Vrun_hooks))
    call1 (Vrun_hooks, Qminibuffer_setup_hook);

/* ??? MCC did redraw_screen here if switching screens.  */
  recursive_edit_1 ();

  /* If cursor is on the minibuffer line,
     show the user we have exited by putting it in column 0.  */
  if ((FRAME_CURSOR_Y (selected_frame)
       >= XFASTINT (XWINDOW (minibuf_window)->top))
      && !noninteractive)
    {
      FRAME_CURSOR_X (selected_frame) = 0;
      update_frame (selected_frame, 1, 1);
    }

  /* Make minibuffer contents into a string */
  val = make_buffer_string (1, Z, 1);
#if 0  /* make_buffer_string should handle the gap.  */
  bcopy (GAP_END_ADDR, XSTRING (val)->data + GPT - BEG, Z - GPT);
#endif

  /* VAL is the string of minibuffer text.  */
  last_minibuf_string = val;

  /* Add the value to the appropriate history list unless it is empty.  */
  if (XSTRING (val)->size != 0
      && SYMBOLP (Vminibuffer_history_variable)
      && ! EQ (XSYMBOL (Vminibuffer_history_variable)->value, Qunbound))
    {
      /* If the caller wanted to save the value read on a history list,
	 then do so if the value is not already the front of the list.  */
      Lisp_Object histval;
      histval = Fsymbol_value (Vminibuffer_history_variable);

      /* The value of the history variable must be a cons or nil.  Other
	 values are unacceptable.  We silently ignore these values.  */
      if (NILP (histval)
	  || (CONSP (histval)
	      && NILP (Fequal (last_minibuf_string, Fcar (histval)))))
	Fset (Vminibuffer_history_variable,
	      Fcons (last_minibuf_string, histval));
    }

  /* If Lisp form desired instead of string, parse it. */
  if (expflag)
    {
      Lisp_Object expr_and_pos;
      unsigned char *p;

      expr_and_pos = Fread_from_string (val, Qnil, Qnil);
      /* Ignore trailing whitespace; any other trailing junk is an error.  */
      for (p = XSTRING (val)->data + XINT (Fcdr (expr_and_pos)); *p; p++)
	if (*p != ' ' && *p != '\t' && *p != '\n')
	  error ("Trailing garbage following expression");
      val = Fcar (expr_and_pos);
    }

  /* The appropriate frame will get selected
     in set-window-configuration.  */
  RETURN_UNGCPRO (unbind_to (count, val));
}

/* Return a buffer to be used as the minibuffer at depth `depth'.
 depth = 0 is the lowest allowed argument, and that is the value
 used for nonrecursive minibuffer invocations */

Lisp_Object
get_minibuffer (depth)
     int depth;
{
  Lisp_Object tail, num, buf;
  char name[24];
  extern Lisp_Object nconc2 ();

  XSETFASTINT (num, depth);
  tail = Fnthcdr (num, Vminibuffer_list);
  if (NILP (tail))
    {
      tail = Fcons (Qnil, Qnil);
      Vminibuffer_list = nconc2 (Vminibuffer_list, tail);
    }
  buf = Fcar (tail);
  if (NILP (buf) || NILP (XBUFFER (buf)->name))
    {
      sprintf (name, " *Minibuf-%d*", depth);
      buf = Fget_buffer_create (build_string (name));

      /* Although the buffer's name starts with a space, undo should be
	 enabled in it.  */
      Fbuffer_enable_undo (buf);

      XCONS (tail)->car = buf;
    }
  else
    {
      int count = specpdl_ptr - specpdl;

      reset_buffer (XBUFFER (buf));
      record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
      Fset_buffer (buf);
      Fkill_all_local_variables ();
      unbind_to (count, Qnil);
    }

  return buf;
}

/* This function is called on exiting minibuffer, whether normally or not,
 and it restores the current window, buffer, etc. */

void
read_minibuf_unwind (data)
     Lisp_Object data;
{
  Lisp_Object old_deactivate_mark;
  Lisp_Object window;

  /* We are exiting the minibuffer one way or the other,
     so run the hook.  */
  if (!NILP (Vminibuffer_exit_hook) && !EQ (Vminibuffer_exit_hook, Qunbound)
      && !NILP (Vrun_hooks))
    safe_run_hooks (Qminibuffer_exit_hook);

  /* If this was a recursive minibuffer,
     tie the minibuffer window back to the outer level minibuffer buffer.  */
  minibuf_level--;

  window = minibuf_window;
  /* To keep things predictable, in case it matters, let's be in the minibuffer
     when we reset the relevant variables.  */
  Fset_buffer (XWINDOW (window)->buffer);

  /* Restore prompt, etc, from outer minibuffer level.  */
  minibuf_prompt = Fcar (minibuf_save_list);
  minibuf_save_list = Fcdr (minibuf_save_list);
  minibuf_prompt_width = XFASTINT (Fcar (minibuf_save_list));
  minibuf_save_list = Fcdr (minibuf_save_list);
  Vhelp_form = Fcar (minibuf_save_list);
  minibuf_save_list = Fcdr (minibuf_save_list);
  Vcurrent_prefix_arg = Fcar (minibuf_save_list);
  minibuf_save_list = Fcdr (minibuf_save_list);
  Vminibuffer_history_position = Fcar (minibuf_save_list);
  minibuf_save_list = Fcdr (minibuf_save_list);
  Vminibuffer_history_variable = Fcar (minibuf_save_list);
  minibuf_save_list = Fcdr (minibuf_save_list);
  Voverriding_local_map = Fcar (minibuf_save_list);
  minibuf_save_list = Fcdr (minibuf_save_list);
  minibuf_window = Fcar (minibuf_save_list);
  minibuf_save_list = Fcdr (minibuf_save_list);

  /* Erase the minibuffer we were using at this level.  */
  {
    int count = specpdl_ptr - specpdl;
    /* Prevent error in erase-buffer.  */
    specbind (Qinhibit_read_only, Qt);
    old_deactivate_mark = Vdeactivate_mark;
    Ferase_buffer ();
    Vdeactivate_mark = old_deactivate_mark;
    unbind_to (count, Qnil);
  }

  /* Make sure minibuffer window is erased, not ignored.  */
  windows_or_buffers_changed++;
  XSETFASTINT (XWINDOW (window)->last_modified, 0);
}


/* This comment supplies the doc string for read-from-minibuffer, 
   for make-docfile to see.  We cannot put this in the real DEFUN
   due to limits in the Unix cpp.

DEFUN ("read-from-minibuffer", Fread_from_minibuffer, Sread_from_minibuffer, 1, 5, 0,
  "Read a string from the minibuffer, prompting with string PROMPT.\n\
If optional second arg INITIAL-CONTENTS is non-nil, it is a string\n\
  to be inserted into the minibuffer before reading input.\n\
  If INITIAL-CONTENTS is (STRING . POSITION), the initial input\n\
  is STRING, but point is placed POSITION characters into the string.\n\
Third arg KEYMAP is a keymap to use whilst reading;\n\
  if omitted or nil, the default is `minibuffer-local-map'.\n\
If fourth arg READ is non-nil, then interpret the result as a lisp object\n\
  and return that object:\n\
  in other words, do `(car (read-from-string INPUT-STRING))'\n\
Fifth arg HIST, if non-nil, specifies a history list\n\
  and optionally the initial position in the list.\n\
  It can be a symbol, which is the history list variable to use,\n\
  or it can be a cons cell (HISTVAR . HISTPOS).\n\
  In that case, HISTVAR is the history list variable to use,\n\
  and HISTPOS is the initial position (the position in the list\n\
  which INITIAL-CONTENTS corresponds to).\n\
  Positions are counted starting from 1 at the beginning of the list."
*/

DEFUN ("read-from-minibuffer", Fread_from_minibuffer, Sread_from_minibuffer, 1, 5, 0,
  0 /* See immediately above */)
  (prompt, initial_contents, keymap, read, hist)
     Lisp_Object prompt, initial_contents, keymap, read, hist;
{
  int pos = 0;
  Lisp_Object histvar, histpos, position;
  position = Qnil;

  CHECK_STRING (prompt, 0);
  if (!NILP (initial_contents))
    {
      if (CONSP (initial_contents))
	{
	  position = Fcdr (initial_contents);
	  initial_contents = Fcar (initial_contents);
	}
      CHECK_STRING (initial_contents, 1);
      if (!NILP (position))
	{
	  CHECK_NUMBER (position, 0);
	  /* Convert to distance from end of input.  */
	  pos = XINT (position) - 1 - XSTRING (initial_contents)->size;
	}
    }

  if (NILP (keymap))
    keymap = Vminibuffer_local_map;
  else
    keymap = get_keymap (keymap,2);

  if (SYMBOLP (hist))
    {
      histvar = hist;
      histpos = Qnil;
    }
  else
    {
      histvar = Fcar_safe (hist);
      histpos = Fcdr_safe (hist);
    }
  if (NILP (histvar))
    histvar = Qminibuffer_history;
  if (NILP (histpos))
    XSETFASTINT (histpos, 0);

  return read_minibuf (keymap, initial_contents, prompt,
		       make_number (pos), !NILP (read), histvar, histpos);
}

DEFUN ("read-minibuffer", Fread_minibuffer, Sread_minibuffer, 1, 2, 0,
  "Return a Lisp object read using the minibuffer.\n\
Prompt with PROMPT.  If non-nil, optional second arg INITIAL-CONTENTS\n\
is a string to insert in the minibuffer before reading.")
  (prompt, initial_contents)
     Lisp_Object prompt, initial_contents;
{
  CHECK_STRING (prompt, 0);
  if (!NILP (initial_contents))
    CHECK_STRING (initial_contents, 1);
  return read_minibuf (Vminibuffer_local_map, initial_contents,
		       prompt, Qnil, 1, Qminibuffer_history, make_number (0));
}

DEFUN ("eval-minibuffer", Feval_minibuffer, Seval_minibuffer, 1, 2, 0,
  "Return value of Lisp expression read using the minibuffer.\n\
Prompt with PROMPT.  If non-nil, optional second arg INITIAL-CONTENTS\n\
is a string to insert in the minibuffer before reading.")
  (prompt, initial_contents)
     Lisp_Object prompt, initial_contents;
{
  return Feval (Fread_minibuffer (prompt, initial_contents));
}

/* Functions that use the minibuffer to read various things. */

DEFUN ("read-string", Fread_string, Sread_string, 1, 3, 0,
  "Read a string from the minibuffer, prompting with string PROMPT.\n\
If non-nil, second arg INITIAL-INPUT is a string to insert before reading.\n\
The third arg HISTORY, if non-nil, specifies a history list\n\
  and optionally the initial position in the list.\n\
See `read-from-minibuffer' for details of HISTORY argument.")
  (prompt, initial_input, history)
     Lisp_Object prompt, initial_input, history;
{
  return Fread_from_minibuffer (prompt, initial_input, Qnil, Qnil, history);
}

DEFUN ("read-no-blanks-input", Fread_no_blanks_input, Sread_no_blanks_input, 1, 2, 0,
  "Args PROMPT and INIT, strings.  Read a string from the terminal, not allowing blanks.\n\
Prompt with PROMPT, and provide INIT as an initial value of the input string.")
  (prompt, init)
     Lisp_Object prompt, init;
{
  CHECK_STRING (prompt, 0);
  if (! NILP (init))
    CHECK_STRING (init, 1);

  return read_minibuf (Vminibuffer_local_ns_map, init, prompt, Qnil, 0,
		       Qminibuffer_history, make_number (0));
}

DEFUN ("read-command", Fread_command, Sread_command, 1, 1, 0,
  "One arg PROMPT, a string.  Read the name of a command and return as a symbol.\n\
Prompts with PROMPT.")
  (prompt)
     Lisp_Object prompt;
{
  return Fintern (Fcompleting_read (prompt, Vobarray, Qcommandp, Qt, Qnil, Qnil),
		  Qnil);
}

#ifdef NOTDEF
DEFUN ("read-function", Fread_function, Sread_function, 1, 1, 0,
  "One arg PROMPT, a string.  Read the name of a function and return as a symbol.\n\
Prompts with PROMPT.")
  (prompt)
     Lisp_Object prompt;
{
  return Fintern (Fcompleting_read (prompt, Vobarray, Qfboundp, Qt, Qnil, Qnil),
		  Qnil);
}
#endif /* NOTDEF */

DEFUN ("read-variable", Fread_variable, Sread_variable, 1, 1, 0,
  "One arg PROMPT, a string.  Read the name of a user variable and return\n\
it as a symbol.  Prompts with PROMPT.\n\
A user variable is one whose documentation starts with a `*' character.")
  (prompt)
     Lisp_Object prompt;
{
  return Fintern (Fcompleting_read (prompt, Vobarray,
				    Quser_variable_p, Qt, Qnil, Qnil),
		  Qnil);
}

DEFUN ("read-buffer", Fread_buffer, Sread_buffer, 1, 3, 0,
  "One arg PROMPT, a string.  Read the name of a buffer and return as a string.\n\
Prompts with PROMPT.\n\
Optional second arg is value to return if user enters an empty line.\n\
If optional third arg REQUIRE-MATCH is non-nil, only existing buffer names are allowed.")
  (prompt, def, require_match)
     Lisp_Object prompt, def, require_match;
{
  Lisp_Object tem;
  Lisp_Object args[3];
  struct gcpro gcpro1;

  if (BUFFERP (def))
    def = XBUFFER (def)->name;
  if (!NILP (def))
    {
      args[0] = build_string ("%s(default %s) ");
      args[1] = prompt;
      args[2] = def;
      prompt = Fformat (3, args);
    }
  GCPRO1 (def);
  tem = Fcompleting_read (prompt, Vbuffer_alist, Qnil, require_match, Qnil, Qnil);
  UNGCPRO;
  if (XSTRING (tem)->size)
    return tem;
  return def;
}

DEFUN ("try-completion", Ftry_completion, Stry_completion, 2, 3, 0,
  "Return common substring of all completions of STRING in ALIST.\n\
Each car of each element of ALIST is tested to see if it begins with STRING.\n\
All that match are compared together; the longest initial sequence\n\
common to all matches is returned as a string.\n\
If there is no match at all, nil is returned.\n\
For an exact match, t is returned.\n\
\n\
ALIST can be an obarray instead of an alist.\n\
Then the print names of all symbols in the obarray are the possible matches.\n\
\n\
ALIST can also be a function to do the completion itself.\n\
It receives three arguments: the values STRING, PREDICATE and nil.\n\
Whatever it returns becomes the value of `try-completion'.\n\
\n\
If optional third argument PREDICATE is non-nil,\n\
it is used to test each possible match.\n\
The match is a candidate only if PREDICATE returns non-nil.\n\
The argument given to PREDICATE is the alist element\n\
or the symbol from the obarray.")
  (string, alist, predicate)
     Lisp_Object string, alist, predicate;
{
  Lisp_Object bestmatch, tail, elt, eltstring;
  int bestmatchsize;
  int compare, matchsize;
  int list = CONSP (alist) || NILP (alist);
  int index, obsize;
  int matchcount = 0;
  Lisp_Object bucket, zero, end, tem;
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;

  CHECK_STRING (string, 0);
  if (!list && !VECTORP (alist))
    return call3 (alist, string, predicate, Qnil);

  bestmatch = Qnil;

  /* If ALIST is not a list, set TAIL just for gc pro.  */
  tail = alist;
  if (! list)
    {
      index = 0;
      obsize = XVECTOR (alist)->size;
      bucket = XVECTOR (alist)->contents[index];
    }

  while (1)
    {
      /* Get the next element of the alist or obarray. */
      /* Exit the loop if the elements are all used up. */
      /* elt gets the alist element or symbol.
	 eltstring gets the name to check as a completion. */

      if (list)
	{
	  if (NILP (tail))
	    break;
	  elt = Fcar (tail);
	  eltstring = Fcar (elt);
	  tail = Fcdr (tail);
	}
      else
	{
	  if (XFASTINT (bucket) != 0)
	    {
	      elt = bucket;
	      eltstring = Fsymbol_name (elt);
	      if (XSYMBOL (bucket)->next)
		XSETSYMBOL (bucket, XSYMBOL (bucket)->next);
	      else
		XSETFASTINT (bucket, 0);
	    }
	  else if (++index >= obsize)
	    break;
	  else
	    {
	      bucket = XVECTOR (alist)->contents[index];
	      continue;
	    }
	}

      /* Is this element a possible completion? */

      if (STRINGP (eltstring)
	  && XSTRING (string)->size <= XSTRING (eltstring)->size
	  && 0 > scmp (XSTRING (eltstring)->data, XSTRING (string)->data,
		       XSTRING (string)->size))
	{
	  /* Yes. */
	  Lisp_Object regexps;
	  Lisp_Object zero;
	  XSETFASTINT (zero, 0);

	  /* Ignore this element if it fails to match all the regexps.  */
	  for (regexps = Vcompletion_regexp_list; CONSP (regexps);
	       regexps = XCONS (regexps)->cdr)
	    {
	      tem = Fstring_match (XCONS (regexps)->car, eltstring, zero);
	      if (NILP (tem))
		break;
	    }
	  if (CONSP (regexps))
	    continue;

	  /* Ignore this element if there is a predicate
	     and the predicate doesn't like it. */

	  if (!NILP (predicate))
	    {
	      if (EQ (predicate, Qcommandp))
		tem = Fcommandp (elt);
	      else
		{
		  GCPRO4 (tail, string, eltstring, bestmatch);
		  tem = call1 (predicate, elt);
		  UNGCPRO;
		}
	      if (NILP (tem)) continue;
	    }

	  /* Update computation of how much all possible completions match */

	  matchcount++;
	  if (NILP (bestmatch))
	    bestmatch = eltstring, bestmatchsize = XSTRING (eltstring)->size;
	  else
	    {
	      compare = min (bestmatchsize, XSTRING (eltstring)->size);
	      matchsize = scmp (XSTRING (bestmatch)->data,
				XSTRING (eltstring)->data,
				compare);
	      if (matchsize < 0)
		matchsize = compare;
	      if (completion_ignore_case)
		{
		  /* If this is an exact match except for case,
		     use it as the best match rather than one that is not an
		     exact match.  This way, we get the case pattern
		     of the actual match.  */
		  if ((matchsize == XSTRING (eltstring)->size
		       && matchsize < XSTRING (bestmatch)->size)
		      ||
		      /* If there is more than one exact match ignoring case,
			 and one of them is exact including case,
			 prefer that one.  */
		      /* If there is no exact match ignoring case,
			 prefer a match that does not change the case
			 of the input.  */
		      ((matchsize == XSTRING (eltstring)->size)
		       ==
		       (matchsize == XSTRING (bestmatch)->size)
		       && !bcmp (XSTRING (eltstring)->data,
				 XSTRING (string)->data, XSTRING (string)->size)
		       && bcmp (XSTRING (bestmatch)->data,
				XSTRING (string)->data, XSTRING (string)->size)))
		    bestmatch = eltstring;
		}
	      bestmatchsize = matchsize;
	    }
	}
    }

  if (NILP (bestmatch))
    return Qnil;		/* No completions found */
  /* If we are ignoring case, and there is no exact match,
     and no additional text was supplied,
     don't change the case of what the user typed.  */
  if (completion_ignore_case && bestmatchsize == XSTRING (string)->size
      && XSTRING (bestmatch)->size > bestmatchsize)
    return string;

  /* Return t if the supplied string is an exact match (counting case);
     it does not require any change to be made.  */
  if (matchcount == 1 && bestmatchsize == XSTRING (string)->size
      && !bcmp (XSTRING (bestmatch)->data, XSTRING (string)->data,
		bestmatchsize))
    return Qt;

  XSETFASTINT (zero, 0);		/* Else extract the part in which */
  XSETFASTINT (end, bestmatchsize);	/* all completions agree */
  return Fsubstring (bestmatch, zero, end);
}

/* Compare exactly LEN chars of strings at S1 and S2,
   ignoring case if appropriate.
   Return -1 if strings match,
   else number of chars that match at the beginning.  */

int
scmp (s1, s2, len)
     register unsigned char *s1, *s2;
     int len;
{
  register int l = len;

  if (completion_ignore_case)
    {
      while (l && DOWNCASE (*s1++) == DOWNCASE (*s2++))
	l--;
    }
  else
    {
      while (l && *s1++ == *s2++)
	l--;
    }
  if (l == 0)
    return -1;
  else
    return len - l;
}

DEFUN ("all-completions", Fall_completions, Sall_completions, 2, 4, 0,
  "Search for partial matches to STRING in ALIST.\n\
Each car of each element of ALIST is tested to see if it begins with STRING.\n\
The value is a list of all the strings from ALIST that match.\n\
\n\
ALIST can be an obarray instead of an alist.\n\
Then the print names of all symbols in the obarray are the possible matches.\n\
\n\
ALIST can also be a function to do the completion itself.\n\
It receives three arguments: the values STRING, PREDICATE and t.\n\
Whatever it returns becomes the value of `all-completion'.\n\
\n\
If optional third argument PREDICATE is non-nil,\n\
it is used to test each possible match.\n\
The match is a candidate only if PREDICATE returns non-nil.\n\
The argument given to PREDICATE is the alist element\n\
or the symbol from the obarray.\n\
\n\
If the optional fourth argument HIDE-SPACES is non-nil,\n\
strings in ALIST that start with a space\n\
are ignored unless STRING itself starts with a space.")
  (string, alist, predicate, hide_spaces)
     Lisp_Object string, alist, predicate, hide_spaces;
{
  Lisp_Object tail, elt, eltstring;
  Lisp_Object allmatches;
  int list = CONSP (alist) || NILP (alist);
  int index, obsize;
  Lisp_Object bucket, tem;
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;

  CHECK_STRING (string, 0);
  if (!list && !VECTORP (alist))
    {
      return call3 (alist, string, predicate, Qt);
    }
  allmatches = Qnil;

  /* If ALIST is not a list, set TAIL just for gc pro.  */
  tail = alist;
  if (! list)
    {
      index = 0;
      obsize = XVECTOR (alist)->size;
      bucket = XVECTOR (alist)->contents[index];
    }

  while (1)
    {
      /* Get the next element of the alist or obarray. */
      /* Exit the loop if the elements are all used up. */
      /* elt gets the alist element or symbol.
	 eltstring gets the name to check as a completion. */

      if (list)
	{
	  if (NILP (tail))
	    break;
	  elt = Fcar (tail);
	  eltstring = Fcar (elt);
	  tail = Fcdr (tail);
	}
      else
	{
	  if (XFASTINT (bucket) != 0)
	    {
	      elt = bucket;
	      eltstring = Fsymbol_name (elt);
	      if (XSYMBOL (bucket)->next)
		XSETSYMBOL (bucket, XSYMBOL (bucket)->next);
	      else
		XSETFASTINT (bucket, 0);
	    }
	  else if (++index >= obsize)
	    break;
	  else
	    {
	      bucket = XVECTOR (alist)->contents[index];
	      continue;
	    }
	}

      /* Is this element a possible completion? */

      if (STRINGP (eltstring)
	  && XSTRING (string)->size <= XSTRING (eltstring)->size
	  /* If HIDE_SPACES, reject alternatives that start with space
	     unless the input starts with space.  */
	  && ((XSTRING (string)->size > 0 && XSTRING (string)->data[0] == ' ')
	      || XSTRING (eltstring)->data[0] != ' '
	      || NILP (hide_spaces))
	  && 0 > scmp (XSTRING (eltstring)->data, XSTRING (string)->data,
		       XSTRING (string)->size))
	{
	  /* Yes. */
	  Lisp_Object regexps;
	  Lisp_Object zero;
	  XSETFASTINT (zero, 0);

	  /* Ignore this element if it fails to match all the regexps.  */
	  for (regexps = Vcompletion_regexp_list; CONSP (regexps);
	       regexps = XCONS (regexps)->cdr)
	    {
	      tem = Fstring_match (XCONS (regexps)->car, eltstring, zero);
	      if (NILP (tem))
		break;
	    }
	  if (CONSP (regexps))
	    continue;

	  /* Ignore this element if there is a predicate
	     and the predicate doesn't like it. */

	  if (!NILP (predicate))
	    {
	      if (EQ (predicate, Qcommandp))
		tem = Fcommandp (elt);
	      else
		{
		  GCPRO4 (tail, eltstring, allmatches, string);
		  tem = call1 (predicate, elt);
		  UNGCPRO;
		}
	      if (NILP (tem)) continue;
	    }
	  /* Ok => put it on the list. */
	  allmatches = Fcons (eltstring, allmatches);
	}
    }

  return Fnreverse (allmatches);
}

Lisp_Object Vminibuffer_completion_table, Qminibuffer_completion_table;
Lisp_Object Vminibuffer_completion_predicate, Qminibuffer_completion_predicate;
Lisp_Object Vminibuffer_completion_confirm, Qminibuffer_completion_confirm;

/* This comment supplies the doc string for completing-read,
   for make-docfile to see.  We cannot put this in the real DEFUN
   due to limits in the Unix cpp.

DEFUN ("completing-read", Fcompleting_read, Scompleting_read, 2, 6, 0,
  "Read a string in the minibuffer, with completion.\n\
PROMPT is a string to prompt with; normally it ends in a colon and a space.\n\
TABLE is an alist whose elements' cars are strings, or an obarray.\n\
PREDICATE limits completion to a subset of TABLE.\n\
See `try-completion' and `all-completions' for more details
 on completion, TABLE, and PREDICATE.\n\
\n\
If REQUIRE-MATCH is non-nil, the user is not allowed to exit unless\n\
 the input is (or completes to) an element of TABLE or is null.\n\
 If it is also not t, Return does not exit if it does non-null completion.\n\
If the input is null, `completing-read' returns nil,\n\
 regardless of the value of REQUIRE-MATCH.\n\
\n\
If INITIAL-INPUT is non-nil, insert it in the minibuffer initially.\n\
  If it is (STRING . POSITION), the initial input\n\
  is STRING, but point is placed POSITION characters into the string.\n\
HIST, if non-nil, specifies a history list\n\
  and optionally the initial position in the list.\n\
  It can be a symbol, which is the history list variable to use,\n\
  or it can be a cons cell (HISTVAR . HISTPOS).\n\
  In that case, HISTVAR is the history list variable to use,\n\
  and HISTPOS is the initial position (the position in the list\n\
  which INITIAL-CONTENTS corresponds to).\n\
  Positions are counted starting from 1 at the beginning of the list.\n\
Completion ignores case if the ambient value of\n\
  `completion-ignore-case' is non-nil."
*/
DEFUN ("completing-read", Fcompleting_read, Scompleting_read, 2, 6, 0,
  0 /* See immediately above */)
  (prompt, table, predicate, require_match, init, hist)
     Lisp_Object prompt, table, predicate, require_match, init, hist;
{
  Lisp_Object val, histvar, histpos, position;
  int pos = 0;
  int count = specpdl_ptr - specpdl;
  specbind (Qminibuffer_completion_table, table);
  specbind (Qminibuffer_completion_predicate, predicate);
  specbind (Qminibuffer_completion_confirm,
	    EQ (require_match, Qt) ? Qnil : Qt);
  last_exact_completion = Qnil;

  position = Qnil;
  if (!NILP (init))
    {
      if (CONSP (init))
	{
	  position = Fcdr (init);
	  init = Fcar (init);
	}
      CHECK_STRING (init, 0);
      if (!NILP (position))
	{
	  CHECK_NUMBER (position, 0);
	  /* Convert to distance from end of input.  */
	  pos = XINT (position) - XSTRING (init)->size;
	}
    }

  if (SYMBOLP (hist))
    {
      histvar = hist;
      histpos = Qnil;
    }
  else
    {
      histvar = Fcar_safe (hist);
      histpos = Fcdr_safe (hist);
    }
  if (NILP (histvar))
    histvar = Qminibuffer_history;
  if (NILP (histpos))
    XSETFASTINT (histpos, 0);

  val = read_minibuf (NILP (require_match)
		      ? Vminibuffer_local_completion_map
		      : Vminibuffer_local_must_match_map,
		      init, prompt, make_number (pos), 0,
		      histvar, histpos);
  return unbind_to (count, val);
}

/* Temporarily display the string M at the end of the current
   minibuffer contents.  This is used to display things like
   "[No Match]" when the user requests a completion for a prefix
   that has no possible completions, and other quick, unobtrusive
   messages.  */

temp_echo_area_glyphs (m)
     char *m;
{
  int osize = ZV;
  int opoint = PT;
  Lisp_Object oinhibit;
  oinhibit = Vinhibit_quit;

  /* Clear out any old echo-area message to make way for our new thing.  */
  message (0);

  SET_PT (osize);
  insert_string (m);
  SET_PT (opoint);
  Vinhibit_quit = Qt;
  Fsit_for (make_number (2), Qnil, Qnil);
  del_range (osize, ZV);
  SET_PT (opoint);
  if (!NILP (Vquit_flag))
    {
      Vquit_flag = Qnil;
      Vunread_command_events = Fcons (make_number (quit_char), Qnil);
    }
  Vinhibit_quit = oinhibit;
}

Lisp_Object Fminibuffer_completion_help ();
Lisp_Object assoc_for_completion ();
/* A subroutine of Fintern_soft.  */
extern Lisp_Object oblookup ();


/* Test whether TXT is an exact completion.  */
Lisp_Object
test_completion (txt)
     Lisp_Object txt;
{
  Lisp_Object tem;

  if (CONSP (Vminibuffer_completion_table)
      || NILP (Vminibuffer_completion_table))
    return assoc_for_completion (txt, Vminibuffer_completion_table);
  else if (VECTORP (Vminibuffer_completion_table))
    {
      /* Bypass intern-soft as that loses for nil */
      tem = oblookup (Vminibuffer_completion_table,
		      XSTRING (txt)->data, XSTRING (txt)->size);
      if (!SYMBOLP (tem))
	return Qnil;
      else if (!NILP (Vminibuffer_completion_predicate))
	return call1 (Vminibuffer_completion_predicate, tem);
      else
	return Qt;
    }
  else
    return call3 (Vminibuffer_completion_table, txt,
		  Vminibuffer_completion_predicate, Qlambda);
}

/* returns:
 * 0 no possible completion
 * 1 was already an exact and unique completion
 * 3 was already an exact completion
 * 4 completed to an exact completion
 * 5 some completion happened
 * 6 no completion happened
 */
int
do_completion ()
{
  Lisp_Object completion, tem;
  int completedp;
  Lisp_Object last;
  struct gcpro gcpro1, gcpro2;

  completion = Ftry_completion (Fbuffer_string (), Vminibuffer_completion_table,
				Vminibuffer_completion_predicate);
  last = last_exact_completion;
  last_exact_completion = Qnil;

  GCPRO2 (completion, last);

  if (NILP (completion))
    {
      bitch_at_user ();
      temp_echo_area_glyphs (" [No match]");
      UNGCPRO;
      return 0;
    }

  if (EQ (completion, Qt))	/* exact and unique match */
    {
      UNGCPRO;
      return 1;
    }

  /* compiler bug */
  tem = Fstring_equal (completion, Fbuffer_string());
  if (completedp = NILP (tem))
    {
      Ferase_buffer ();		/* Some completion happened */
      Finsert (1, &completion);
    }

  /* It did find a match.  Do we match some possibility exactly now? */
  tem = test_completion (Fbuffer_string ());
  if (NILP (tem))
    {
      /* not an exact match */
      UNGCPRO;
      if (completedp)
	return 5;
      else if (auto_help)
	Fminibuffer_completion_help ();
      else
	temp_echo_area_glyphs (" [Next char not unique]");
      return 6;
    }
  else if (completedp)
    {
      UNGCPRO;
      return 4;
    }
  /* If the last exact completion and this one were the same,
     it means we've already given a "Complete but not unique"
     message and the user's hit TAB again, so now we give him help.  */
  last_exact_completion = completion;
  if (!NILP (last))
    {
      tem = Fbuffer_string ();
      if (!NILP (Fequal (tem, last)))
	Fminibuffer_completion_help ();
    }
  UNGCPRO;
  return 3;
}

/* Like assoc but assumes KEY is a string, and ignores case if appropriate.  */

Lisp_Object
assoc_for_completion (key, list)
     register Lisp_Object key;
     Lisp_Object list;
{
  register Lisp_Object tail;

  if (completion_ignore_case)
    key = Fupcase (key);

  for (tail = list; !NILP (tail); tail = Fcdr (tail))
    {
      register Lisp_Object elt, tem, thiscar;
      elt = Fcar (tail);
      if (!CONSP (elt)) continue;
      thiscar = Fcar (elt);
      if (!STRINGP (thiscar))
	continue;
      if (completion_ignore_case)
	thiscar = Fupcase (thiscar);
      tem = Fequal (thiscar, key);
      if (!NILP (tem)) return elt;
      QUIT;
    }
  return Qnil;
}

DEFUN ("minibuffer-complete", Fminibuffer_complete, Sminibuffer_complete, 0, 0, "",
  "Complete the minibuffer contents as far as possible.\n\
Return nil if there is no valid completion, else t.\n\
If no characters can be completed, display a list of possible completions.\n\
If you repeat this command after it displayed such a list,\n\
scroll the window of possible completions.")
  ()
{
  register int i;
  Lisp_Object window, tem;

  /* If the previous command was not this, then mark the completion
     buffer obsolete.  */
  if (! EQ (current_kboard->Vlast_command, this_command))
    Vminibuf_scroll_window = Qnil;

  window = Vminibuf_scroll_window;
  /* If there's a fresh completion window with a live buffer,
     and this command is repeated, scroll that window.  */
  if (! NILP (window) && ! NILP (XWINDOW (window)->buffer)
      && !NILP (XBUFFER (XWINDOW (window)->buffer)->name))
    {
      struct buffer *obuf = current_buffer;

      Fset_buffer (XWINDOW (window)->buffer);
      tem = Fpos_visible_in_window_p (make_number (ZV), window);
      if (! NILP (tem))
	/* If end is in view, scroll up to the beginning.  */
	Fset_window_start (window, BEGV, Qnil);
      else
	/* Else scroll down one screen.  */
	Fscroll_other_window (Qnil);

      set_buffer_internal (obuf);
      return Qnil;
    }

  i = do_completion ();
  switch (i)
    {
    case 0:
      return Qnil;

    case 1:
      temp_echo_area_glyphs (" [Sole completion]");
      break;

    case 3:
      temp_echo_area_glyphs (" [Complete, but not unique]");
      break;
    }

  return Qt;
}

/* Subroutines of Fminibuffer_complete_and_exit.  */

/* This one is called by internal_condition_case to do the real work.  */

Lisp_Object
complete_and_exit_1 ()
{
  return make_number (do_completion ());
}

/* This one is called by internal_condition_case if an error happens.
   Pretend the current value is an exact match.  */

Lisp_Object
complete_and_exit_2 (ignore)
     Lisp_Object ignore;
{
  return make_number (1);
}

DEFUN ("minibuffer-complete-and-exit", Fminibuffer_complete_and_exit,
        Sminibuffer_complete_and_exit, 0, 0, "",
  "If the minibuffer contents is a valid completion then exit.\n\
Otherwise try to complete it.  If completion leads to a valid completion,\n\
a repetition of this command will exit.")
  ()
{
  register int i;
  Lisp_Object val;

  /* Allow user to specify null string */
  if (BEGV == ZV)
    goto exit;

  if (!NILP (test_completion (Fbuffer_string ())))
    goto exit;

  /* Call do_completion, but ignore errors.  */
  val = internal_condition_case (complete_and_exit_1, Qerror,
				 complete_and_exit_2);

  i = XFASTINT (val);
  switch (i)
    {
    case 1:
    case 3:
      goto exit;

    case 4:
      if (!NILP (Vminibuffer_completion_confirm))
	{
	  temp_echo_area_glyphs (" [Confirm]");
	  return Qnil;
	}
      else
	goto exit;

    default:
      return Qnil;
    }
 exit:
  Fthrow (Qexit, Qnil);
  /* NOTREACHED */
}

DEFUN ("minibuffer-complete-word", Fminibuffer_complete_word, Sminibuffer_complete_word,
  0, 0, "",
  "Complete the minibuffer contents at most a single word.\n\
After one word is completed as much as possible, a space or hyphen\n\
is added, provided that matches some possible completion.\n\
Return nil if there is no valid completion, else t.")
  ()
{
  Lisp_Object completion, tem;
  register int i;
  register unsigned char *completion_string;
  struct gcpro gcpro1, gcpro2;

  /* We keep calling Fbuffer_string rather than arrange for GC to
     hold onto a pointer to one of the strings thus made.  */

  completion = Ftry_completion (Fbuffer_string (),
				Vminibuffer_completion_table,
				Vminibuffer_completion_predicate);
  if (NILP (completion))
    {
      bitch_at_user ();
      temp_echo_area_glyphs (" [No match]");
      return Qnil;
    }
  if (EQ (completion, Qt))
    return Qnil;

#if 0 /* How the below code used to look, for reference. */
  tem = Fbuffer_string ();
  b = XSTRING (tem)->data;
  i = ZV - 1 - XSTRING (completion)->size;
  p = XSTRING (completion)->data;
  if (i > 0 ||
      0 <= scmp (b, p, ZV - 1))
    {
      i = 1;
      /* Set buffer to longest match of buffer tail and completion head. */
      while (0 <= scmp (b + i, p, ZV - 1 - i))
	i++;
      del_range (1, i + 1);
      SET_PT (ZV);
    }
#else /* Rewritten code */
  {
    register unsigned char *buffer_string;
    int buffer_length, completion_length;

    tem = Fbuffer_string ();
    GCPRO2 (completion, tem);
    /* If reading a file name,
       expand any $ENVVAR refs in the buffer and in TEM.  */
    if (EQ (Vminibuffer_completion_table, Qread_file_name_internal))
      {
	Lisp_Object substituted;
	substituted = Fsubstitute_in_file_name (tem);
	if (! EQ (substituted, tem))
	  {
	    tem = substituted;
	    Ferase_buffer ();
	    insert_from_string (tem, 0, XSTRING (tem)->size, 0);
	  }
      }
    buffer_string = XSTRING (tem)->data;
    completion_string = XSTRING (completion)->data;
    buffer_length = XSTRING (tem)->size; /* ie ZV - BEGV */
    completion_length = XSTRING (completion)->size;
    i = buffer_length - completion_length;
    /* Mly: I don't understand what this is supposed to do AT ALL */
    if (i > 0 ||
	0 <= scmp (buffer_string, completion_string, buffer_length))
      {
	/* Set buffer to longest match of buffer tail and completion head. */
	if (i <= 0) i = 1;
	buffer_string += i;
	buffer_length -= i;
	while (0 <= scmp (buffer_string++, completion_string, buffer_length--))
	  i++;
	del_range (1, i + 1);
	SET_PT (ZV);
      }
    UNGCPRO;
  }
#endif /* Rewritten code */
  i = ZV - BEGV;

  /* If completion finds next char not unique,
     consider adding a space or a hyphen. */
  if (i == XSTRING (completion)->size)
    {
      GCPRO1 (completion);
      tem = Ftry_completion (concat2 (Fbuffer_string (), build_string (" ")),
			     Vminibuffer_completion_table,
			     Vminibuffer_completion_predicate);
      UNGCPRO;

      if (STRINGP (tem))
	completion = tem;
      else
	{
	  GCPRO1 (completion);
	  tem =
	    Ftry_completion (concat2 (Fbuffer_string (), build_string ("-")),
			     Vminibuffer_completion_table,
			     Vminibuffer_completion_predicate);
	  UNGCPRO;

	  if (STRINGP (tem))
	    completion = tem;
	}
    }      

  /* Now find first word-break in the stuff found by completion.
     i gets index in string of where to stop completing.  */

  completion_string = XSTRING (completion)->data;

  for (; i < XSTRING (completion)->size; i++)
    if (SYNTAX (completion_string[i]) != Sword) break;
  if (i < XSTRING (completion)->size)
    i = i + 1;

  /* If got no characters, print help for user.  */

  if (i == ZV - BEGV)
    {
      if (auto_help)
	Fminibuffer_completion_help ();
      return Qnil;
    }

  /* Otherwise insert in minibuffer the chars we got */

  Ferase_buffer ();
  insert_from_string (completion, 0, i, 1);
  return Qt;
}

DEFUN ("display-completion-list", Fdisplay_completion_list, Sdisplay_completion_list,
       1, 1, 0,
  "Display the list of completions, COMPLETIONS, using `standard-output'.\n\
Each element may be just a symbol or string\n\
or may be a list of two strings to be printed as if concatenated.\n\
`standard-output' must be a buffer.\n\
At the end, run the normal hook `completion-setup-hook'.\n\
It can find the completion buffer in `standard-output'.")
  (completions)
     Lisp_Object completions;
{
  Lisp_Object tail, elt;
  register int i;
  int column = 0;
  struct gcpro gcpro1, gcpro2;
  struct buffer *old = current_buffer;
  int first = 1;

  /* Note that (when it matters) every variable
     points to a non-string that is pointed to by COMPLETIONS,
     except for ELT.  ELT can be pointing to a string
     when terpri or Findent_to calls a change hook.  */
  elt = Qnil;
  GCPRO2 (completions, elt);

  if (BUFFERP (Vstandard_output))
    set_buffer_internal (XBUFFER (Vstandard_output));

  if (NILP (completions))
    write_string ("There are no possible completions of what you have typed.",
		  -1);
  else
    {
      write_string ("Possible completions are:", -1);
      for (tail = completions, i = 0; !NILP (tail); tail = Fcdr (tail), i++)
	{
	  Lisp_Object tem;
	  int length;
	  Lisp_Object startpos, endpos;

	  elt = Fcar (tail);
	  /* Compute the length of this element.  */
	  if (CONSP (elt))
	    {
	      tem = Fcar (elt);
	      CHECK_STRING (tem, 0);
	      length = XINT (XSTRING (tem)->size);

	      tem = Fcar (Fcdr (elt));
	      CHECK_STRING (tem, 0);
	      length += XINT (XSTRING (tem)->size);
	    }
	  else
	    {
	      CHECK_STRING (elt, 0);
	      length = XINT (XSTRING (elt)->size);
	    }

	  /* This does a bad job for narrower than usual windows.
	     Sadly, the window it will appear in is not known
	     until after the text has been made.  */

	  if (BUFFERP (Vstandard_output))
	    XSETINT (startpos, BUF_PT (XBUFFER (Vstandard_output)));

	  /* If the previous completion was very wide,
	     or we have two on this line already,
	     don't put another on the same line.  */
	  if (column > 33 || first
	      /* If this is really wide, don't put it second on a line.  */
	      || column > 0 && length > 45)
	    {
	      Fterpri (Qnil);
	      column = 0;
	    }
	  /* Otherwise advance to column 35.  */
	  else
	    {
	      if (BUFFERP (Vstandard_output))
		{
		  tem = Findent_to (make_number (35), make_number (2));
		  
		  column = XINT (tem);
		}
	      else
		{
		  do
		    {
		      write_string (" ", -1);
		      column++;
		    }
		  while (column < 35);
		}
	    }

	  if (BUFFERP (Vstandard_output))
	    {
	      XSETINT (endpos, BUF_PT (XBUFFER (Vstandard_output)));
	      Fset_text_properties (startpos, endpos,
				    Qnil, Vstandard_output);
	    }

	  /* Output this element and update COLUMN.  */
	  if (CONSP (elt))
	    {
	      Fprinc (Fcar (elt), Qnil);
	      Fprinc (Fcar (Fcdr (elt)), Qnil);
	    }
	  else
	    Fprinc (elt, Qnil);

	  column += length;

	  /* If output is to a buffer, recompute COLUMN in a way
	     that takes account of character widths.  */
	  if (BUFFERP (Vstandard_output))
	    {
	      tem = Fcurrent_column ();
	      column = XINT (tem);
	    }

	  first = 0;
	}
    }

  UNGCPRO;

  if (BUFFERP (Vstandard_output))
    set_buffer_internal (old);

  if (!NILP (Vrun_hooks))
    call1 (Vrun_hooks, intern ("completion-setup-hook"));

  return Qnil;
}

DEFUN ("minibuffer-completion-help", Fminibuffer_completion_help, Sminibuffer_completion_help,
  0, 0, "",
  "Display a list of possible completions of the current minibuffer contents.")
  ()
{
  Lisp_Object completions;

  message ("Making completion list...");
  completions = Fall_completions (Fbuffer_string (),
				  Vminibuffer_completion_table,
				  Vminibuffer_completion_predicate,
				  Qt);
  echo_area_glyphs = 0;

  if (NILP (completions))
    {
      bitch_at_user ();
      temp_echo_area_glyphs (" [No completions]");
    }
  else
    internal_with_output_to_temp_buffer ("*Completions*",
					 Fdisplay_completion_list,
					 Fsort (completions, Qstring_lessp));
  return Qnil;
}

DEFUN ("self-insert-and-exit", Fself_insert_and_exit, Sself_insert_and_exit, 0, 0, "",
  "Terminate minibuffer input.")
  ()
{
  if (INTEGERP (last_command_char))
    internal_self_insert (last_command_char, 0);
  else
    bitch_at_user ();

  Fthrow (Qexit, Qnil);
}

DEFUN ("exit-minibuffer", Fexit_minibuffer, Sexit_minibuffer, 0, 0, "",
  "Terminate this minibuffer argument.")
  ()
{
  Fthrow (Qexit, Qnil);
}

DEFUN ("minibuffer-depth", Fminibuffer_depth, Sminibuffer_depth, 0, 0, 0,
  "Return current depth of activations of minibuffer, a nonnegative integer.")
  ()
{
  return make_number (minibuf_level);
}

DEFUN ("minibuffer-prompt", Fminibuffer_prompt, Sminibuffer_prompt, 0, 0, 0,
  "Return the prompt string of the currently-active minibuffer.\n\
If no minibuffer is active, return nil.")
  ()
{
  return Fcopy_sequence (minibuf_prompt);
}

DEFUN ("minibuffer-prompt-width", Fminibuffer_prompt_width,
  Sminibuffer_prompt_width, 0, 0, 0,
  "Return the display width of the minibuffer prompt.")
  ()
{
  Lisp_Object width;
  XSETFASTINT (width, minibuf_prompt_width);
  return width;
}

init_minibuf_once ()
{
  Vminibuffer_list = Qnil;
  staticpro (&Vminibuffer_list);
}

syms_of_minibuf ()
{
  minibuf_level = 0;
  minibuf_prompt = Qnil;
  staticpro (&minibuf_prompt);

  minibuf_save_list = Qnil;
  staticpro (&minibuf_save_list);

  Qread_file_name_internal = intern ("read-file-name-internal");
  staticpro (&Qread_file_name_internal);

  Qminibuffer_completion_table = intern ("minibuffer-completion-table");
  staticpro (&Qminibuffer_completion_table);

  Qminibuffer_completion_confirm = intern ("minibuffer-completion-confirm");
  staticpro (&Qminibuffer_completion_confirm);

  Qminibuffer_completion_predicate = intern ("minibuffer-completion-predicate");
  staticpro (&Qminibuffer_completion_predicate);

  staticpro (&last_exact_completion);
  last_exact_completion = Qnil;

  staticpro (&last_minibuf_string);
  last_minibuf_string = Qnil;

  Quser_variable_p = intern ("user-variable-p");
  staticpro (&Quser_variable_p);

  Qminibuffer_history = intern ("minibuffer-history");
  staticpro (&Qminibuffer_history);

  Qminibuffer_setup_hook = intern ("minibuffer-setup-hook");
  staticpro (&Qminibuffer_setup_hook);

  Qminibuffer_exit_hook = intern ("minibuffer-exit-hook");
  staticpro (&Qminibuffer_exit_hook);

  DEFVAR_LISP ("minibuffer-setup-hook", &Vminibuffer_setup_hook, 
    "Normal hook run just after entry to minibuffer.");
  Vminibuffer_setup_hook = Qnil;

  DEFVAR_LISP ("minibuffer-exit-hook", &Vminibuffer_exit_hook,
    "Normal hook run just after exit from minibuffer.");
  Vminibuffer_exit_hook = Qnil;

  DEFVAR_BOOL ("completion-auto-help", &auto_help,
    "*Non-nil means automatically provide help for invalid completion input.");
  auto_help = 1;

  DEFVAR_BOOL ("completion-ignore-case", &completion_ignore_case,
    "Non-nil means don't consider case significant in completion.");
  completion_ignore_case = 0;

  DEFVAR_BOOL ("enable-recursive-minibuffers", &enable_recursive_minibuffers,
    "*Non-nil means to allow minibuffer commands while in the minibuffer.\n\
More precisely, this variable makes a difference when the minibuffer window\n\
is the selected window.  If you are in some other window, minibuffer commands\n\
are allowed even if a minibuffer is active.");
  enable_recursive_minibuffers = 0;

  DEFVAR_LISP ("minibuffer-completion-table", &Vminibuffer_completion_table,
    "Alist or obarray used for completion in the minibuffer.\n\
This becomes the ALIST argument to `try-completion' and `all-completion'.\n\
\n\
The value may alternatively be a function, which is given three arguments:\n\
  STRING, the current buffer contents;\n\
  PREDICATE, the predicate for filtering possible matches;\n\
  CODE, which says what kind of things to do.\n\
CODE can be nil, t or `lambda'.\n\
nil means to return the best completion of STRING, or nil if there is none.\n\
t means to return a list of all possible completions of STRING.\n\
`lambda' means to return t if STRING is a valid completion as it stands.");
  Vminibuffer_completion_table = Qnil;

  DEFVAR_LISP ("minibuffer-completion-predicate", &Vminibuffer_completion_predicate,
    "Within call to `completing-read', this holds the PREDICATE argument.");
  Vminibuffer_completion_predicate = Qnil;

  DEFVAR_LISP ("minibuffer-completion-confirm", &Vminibuffer_completion_confirm,
    "Non-nil => demand confirmation of completion before exiting minibuffer.");
  Vminibuffer_completion_confirm = Qnil;

  DEFVAR_LISP ("minibuffer-help-form", &Vminibuffer_help_form,
    "Value that `help-form' takes on inside the minibuffer.");
  Vminibuffer_help_form = Qnil;

  DEFVAR_LISP ("minibuffer-history-variable", &Vminibuffer_history_variable,
    "History list symbol to add minibuffer values to.\n\
Each string of minibuffer input, as it appears on exit from the minibuffer,\n\
is added with\n\
  (set minibuffer-history-variable\n\
       (cons STRING (symbol-value minibuffer-history-variable)))");
  XSETFASTINT (Vminibuffer_history_variable, 0);

  DEFVAR_LISP ("minibuffer-history-position", &Vminibuffer_history_position,
    "Current position of redoing in the history list.");
  Vminibuffer_history_position = Qnil;

  DEFVAR_BOOL ("minibuffer-auto-raise", &minibuffer_auto_raise,
    "*Non-nil means entering the minibuffer raises the minibuffer's frame.");
  minibuffer_auto_raise = 0;

  DEFVAR_LISP ("completion-regexp-list", &Vcompletion_regexp_list,
    "List of regexps that should restrict possible completions.");
  Vcompletion_regexp_list = Qnil;

  defsubr (&Sset_minibuffer_window);
  defsubr (&Sread_from_minibuffer);
  defsubr (&Seval_minibuffer);
  defsubr (&Sread_minibuffer);
  defsubr (&Sread_string);
  defsubr (&Sread_command);
  defsubr (&Sread_variable);
  defsubr (&Sread_buffer);
  defsubr (&Sread_no_blanks_input);
  defsubr (&Sminibuffer_depth);
  defsubr (&Sminibuffer_prompt);
  defsubr (&Sminibuffer_prompt_width);

  defsubr (&Stry_completion);
  defsubr (&Sall_completions);
  defsubr (&Scompleting_read);
  defsubr (&Sminibuffer_complete);
  defsubr (&Sminibuffer_complete_word);
  defsubr (&Sminibuffer_complete_and_exit);
  defsubr (&Sdisplay_completion_list);
  defsubr (&Sminibuffer_completion_help);

  defsubr (&Sself_insert_and_exit);
  defsubr (&Sexit_minibuffer);

}

keys_of_minibuf ()
{
  initial_define_key (Vminibuffer_local_map, Ctl ('g'),
		      "abort-recursive-edit");
  initial_define_key (Vminibuffer_local_map, Ctl ('m'),
		      "exit-minibuffer");
  initial_define_key (Vminibuffer_local_map, Ctl ('j'),
		      "exit-minibuffer");

  initial_define_key (Vminibuffer_local_ns_map, Ctl ('g'),
		      "abort-recursive-edit");
  initial_define_key (Vminibuffer_local_ns_map, Ctl ('m'),
		      "exit-minibuffer");
  initial_define_key (Vminibuffer_local_ns_map, Ctl ('j'),
		      "exit-minibuffer");

  initial_define_key (Vminibuffer_local_ns_map, ' ',
		      "exit-minibuffer");
  initial_define_key (Vminibuffer_local_ns_map, '\t',
		      "exit-minibuffer");
  initial_define_key (Vminibuffer_local_ns_map, '?',
		      "self-insert-and-exit");

  initial_define_key (Vminibuffer_local_completion_map, Ctl ('g'),
		      "abort-recursive-edit");
  initial_define_key (Vminibuffer_local_completion_map, Ctl ('m'),
		      "exit-minibuffer");
  initial_define_key (Vminibuffer_local_completion_map, Ctl ('j'),
		      "exit-minibuffer");

  initial_define_key (Vminibuffer_local_completion_map, '\t',
		      "minibuffer-complete");
  initial_define_key (Vminibuffer_local_completion_map, ' ',
		      "minibuffer-complete-word");
  initial_define_key (Vminibuffer_local_completion_map, '?',
		      "minibuffer-completion-help");

  initial_define_key (Vminibuffer_local_must_match_map, Ctl ('g'),
		      "abort-recursive-edit");
  initial_define_key (Vminibuffer_local_must_match_map, Ctl ('m'),
		      "minibuffer-complete-and-exit");
  initial_define_key (Vminibuffer_local_must_match_map, Ctl ('j'),
		      "minibuffer-complete-and-exit");
  initial_define_key (Vminibuffer_local_must_match_map, '\t',
		      "minibuffer-complete");
  initial_define_key (Vminibuffer_local_must_match_map, ' ',
		      "minibuffer-complete-word");
  initial_define_key (Vminibuffer_local_must_match_map, '?',
		      "minibuffer-completion-help");
}
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.