summaryrefslogtreecommitdiff
path: root/src/minibuf.c
blob: 9a65e2c9df54f6559e6757e5e62eadd301495991 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
/* 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, ambient_dir;
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;

  single_kboard_state ();

  val = Qnil;
  ambient_dir = current_buffer->directory;

  /* 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.  */
  GCPRO4 (map, initial, val, ambient_dir);

  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");

  /* Choose the minibuffer window and frame, and take action on them.  */

  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

  /* We have to do this after saving the window configuration
     since that is what restores the current buffer.  */

  /* Arrange to restore a number of minibuffer-related variables.
     We could bind each variable separately, but that would use lots of
     specpdl slots.  */
  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))))));

  record_unwind_protect (read_minibuf_unwind, Qnil);
  minibuf_level++;

  /* Now that we can restore all those variables, start changing them.  */

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

  /* Switch to the minibuffer.  */

  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 (ambient_dir))
    current_buffer->directory = ambient_dir;
  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

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

  Fmake_local_variable (Qprint_escape_newlines);
  print_escape_newlines = 1;

  /* Erase the buffer.  */
  {
    int count1 = specpdl_ptr - specpdl;
    specbind (Qinhibit_read_only, Qt);
    Ferase_buffer ();
    unbind_to (count1, Qnil);
  }

  /* Put in the initial input.  */
  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;

  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");
}