1/* text.c -- text handling commands for readline. */
2
3/* Copyright (C) 1987-2005 Free Software Foundation, Inc.
4
5 This file is part of the GNU Readline Library, a library for
6 reading lines of text with interactive input and history editing.
7
8 The GNU Readline Library is free software; you can redistribute it
9 and/or modify it under the terms of the GNU General Public License
10 as published by the Free Software Foundation; either version 2, or
11 (at your option) any later version.
12
13 The GNU Readline Library is distributed in the hope that it will be
14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
15 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 The GNU General Public License is often shipped with GNU software, and
19 is generally kept in a file called COPYING or LICENSE. If you do not
20 have a copy of the license, write to the Free Software Foundation,
21 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
22#define READLINE_LIBRARY
23
24#if defined (HAVE_CONFIG_H)
25# include "config_readline.h"
26#endif
27
28#if defined (HAVE_UNISTD_H)
29# include <unistd.h>
30#endif /* HAVE_UNISTD_H */
31
32#if defined (HAVE_STDLIB_H)
33# include <stdlib.h>
34#else
35# include "ansi_stdlib.h"
36#endif /* HAVE_STDLIB_H */
37
38#if defined (HAVE_LOCALE_H)
39# include <locale.h>
40#endif
41
42#include <stdio.h>
43
44/* System-specific feature definitions and include files. */
45#include "rldefs.h"
46#include "rlmbutil.h"
47
48#if defined (__EMX__)
49# define INCL_DOSPROCESS
50# include <os2.h>
51#endif /* __EMX__ */
52
53/* Some standard library routines. */
54#include "readline.h"
55#include "history.h"
56
57#include "rlprivate.h"
58#include "rlshell.h"
59#include "xmalloc.h"
60
61/* Forward declarations. */
62static int rl_change_case PARAMS((int, int));
63static int _rl_char_search PARAMS((int, int, int));
64
65#if defined (READLINE_CALLBACKS)
66static int _rl_insert_next_callback PARAMS((_rl_callback_generic_arg *));
67static int _rl_char_search_callback PARAMS((_rl_callback_generic_arg *));
68#endif
69
70/* **************************************************************** */
71/* */
72/* Insert and Delete */
73/* */
74/* **************************************************************** */
75
76/* Insert a string of text into the line at point. This is the only
77 way that you should do insertion. _rl_insert_char () calls this
78 function. Returns the number of characters inserted. */
79int
80rl_insert_text (string)
81 const char *string;
82{
83 register int i, l;
84
85 l = (string && *string) ? strlen (string) : 0;
86 if (l == 0)
87 return 0;
88
89 if (rl_end + l >= rl_line_buffer_len)
90 rl_extend_line_buffer (rl_end + l);
91
92 for (i = rl_end; i >= rl_point; i--)
93 rl_line_buffer[i + l] = rl_line_buffer[i];
94 strncpy (rl_line_buffer + rl_point, string, l);
95
96 /* Remember how to undo this if we aren't undoing something. */
97 if (_rl_doing_an_undo == 0)
98 {
99 /* If possible and desirable, concatenate the undos. */
100 if ((l == 1) &&
101 rl_undo_list &&
102 (rl_undo_list->what == UNDO_INSERT) &&
103 (rl_undo_list->end == rl_point) &&
104 (rl_undo_list->end - rl_undo_list->start < 20))
105 rl_undo_list->end++;
106 else
107 rl_add_undo (UNDO_INSERT, rl_point, rl_point + l, (char *)NULL);
108 }
109 rl_point += l;
110 rl_end += l;
111 rl_line_buffer[rl_end] = '\0';
112 return l;
113}
114
115/* Delete the string between FROM and TO. FROM is inclusive, TO is not.
116 Returns the number of characters deleted. */
117int
118rl_delete_text (from, to)
119 int from, to;
120{
121 register char *text;
122 register int diff, i;
123
124 /* Fix it if the caller is confused. */
125 if (from > to)
126 SWAP (from, to);
127
128 /* fix boundaries */
129 if (to > rl_end)
130 {
131 to = rl_end;
132 if (from > to)
133 from = to;
134 }
135 if (from < 0)
136 from = 0;
137
138 text = rl_copy_text (from, to);
139
140 /* Some versions of strncpy() can't handle overlapping arguments. */
141 diff = to - from;
142 for (i = from; i < rl_end - diff; i++)
143 rl_line_buffer[i] = rl_line_buffer[i + diff];
144
145 /* Remember how to undo this delete. */
146 if (_rl_doing_an_undo == 0)
147 rl_add_undo (UNDO_DELETE, from, to, text);
148 else
149 free (text);
150
151 rl_end -= diff;
152 rl_line_buffer[rl_end] = '\0';
153 return (diff);
154}
155
156/* Fix up point so that it is within the line boundaries after killing
157 text. If FIX_MARK_TOO is non-zero, the mark is forced within line
158 boundaries also. */
159
160#define _RL_FIX_POINT(x) \
161 do { \
162 if (x > rl_end) \
163 x = rl_end; \
164 else if (x < 0) \
165 x = 0; \
166 } while (0)
167
168void
169_rl_fix_point (fix_mark_too)
170 int fix_mark_too;
171{
172 _RL_FIX_POINT (rl_point);
173 if (fix_mark_too)
174 _RL_FIX_POINT (rl_mark);
175}
176#undef _RL_FIX_POINT
177
178/* Replace the contents of the line buffer between START and END with
179 TEXT. The operation is undoable. To replace the entire line in an
180 undoable mode, use _rl_replace_text(text, 0, rl_end); */
181int
182_rl_replace_text (text, start, end)
183 const char *text;
184 int start, end;
185{
186 int n;
187
188 rl_begin_undo_group ();
189 rl_delete_text (start, end + 1);
190 rl_point = start;
191 n = rl_insert_text (text);
192 rl_end_undo_group ();
193
194 return n;
195}
196
197/* Replace the current line buffer contents with TEXT. If CLEAR_UNDO is
198 non-zero, we free the current undo list. */
199void
200rl_replace_line (text, clear_undo)
201 const char *text;
202 int clear_undo;
203{
204 int len;
205
206 len = strlen (text);
207 if (len >= rl_line_buffer_len)
208 rl_extend_line_buffer (len);
209 strcpy (rl_line_buffer, text);
210 rl_end = len;
211
212 if (clear_undo)
213 rl_free_undo_list ();
214
215 _rl_fix_point (1);
216}
217
218/* **************************************************************** */
219/* */
220/* Readline character functions */
221/* */
222/* **************************************************************** */
223
224/* This is not a gap editor, just a stupid line input routine. No hair
225 is involved in writing any of the functions, and none should be. */
226
227/* Note that:
228
229 rl_end is the place in the string that we would place '\0';
230 i.e., it is always safe to place '\0' there.
231
232 rl_point is the place in the string where the cursor is. Sometimes
233 this is the same as rl_end.
234
235 Any command that is called interactively receives two arguments.
236 The first is a count: the numeric arg pased to this command.
237 The second is the key which invoked this command.
238*/
239
240/* **************************************************************** */
241/* */
242/* Movement Commands */
243/* */
244/* **************************************************************** */
245
246/* Note that if you `optimize' the display for these functions, you cannot
247 use said functions in other functions which do not do optimizing display.
248 I.e., you will have to update the data base for rl_redisplay, and you
249 might as well let rl_redisplay do that job. */
250
251/* Move forward COUNT bytes. */
252int
253rl_forward_byte (count, key)
254 int count, key;
255{
256 if (count < 0)
257 return (rl_backward_byte (-count, key));
258
259 if (count > 0)
260 {
261 int end = rl_point + count;
262#if defined (VI_MODE)
263 int lend = rl_end > 0 ? rl_end - (rl_editing_mode == vi_mode) : rl_end;
264#else
265 int lend = rl_end;
266#endif
267
268 if (end > lend)
269 {
270 rl_point = lend;
271 rl_ding ();
272 }
273 else
274 rl_point = end;
275 }
276
277 if (rl_end < 0)
278 rl_end = 0;
279
280 return 0;
281}
282
283#if defined (HANDLE_MULTIBYTE)
284/* Move forward COUNT characters. */
285int
286rl_forward_char (count, key)
287 int count, key;
288{
289 int point;
290
291 if (MB_CUR_MAX == 1 || rl_byte_oriented)
292 return (rl_forward_byte (count, key));
293
294 if (count < 0)
295 return (rl_backward_char (-count, key));
296
297 if (count > 0)
298 {
299 point = _rl_find_next_mbchar (rl_line_buffer, rl_point, count, MB_FIND_NONZERO);
300
301#if defined (VI_MODE)
302 if (rl_end <= point && rl_editing_mode == vi_mode)
303 point = _rl_find_prev_mbchar (rl_line_buffer, rl_end, MB_FIND_NONZERO);
304#endif
305
306 if (rl_point == point)
307 rl_ding ();
308
309 rl_point = point;
310
311 if (rl_end < 0)
312 rl_end = 0;
313 }
314
315 return 0;
316}
317#else /* !HANDLE_MULTIBYTE */
318int
319rl_forward_char (count, key)
320 int count, key;
321{
322 return (rl_forward_byte (count, key));
323}
324#endif /* !HANDLE_MULTIBYTE */
325
326/* Backwards compatibility. */
327int
328rl_forward (count, key)
329 int count, key;
330{
331 return (rl_forward_char (count, key));
332}
333
334/* Move backward COUNT bytes. */
335int
336rl_backward_byte (count, key)
337 int count, key;
338{
339 if (count < 0)
340 return (rl_forward_byte (-count, key));
341
342 if (count > 0)
343 {
344 if (rl_point < count)
345 {
346 rl_point = 0;
347 rl_ding ();
348 }
349 else
350 rl_point -= count;
351 }
352
353 if (rl_point < 0)
354 rl_point = 0;
355
356 return 0;
357}
358
359#if defined (HANDLE_MULTIBYTE)
360/* Move backward COUNT characters. */
361int
362rl_backward_char (count, key)
363 int count, key;
364{
365 int point;
366
367 if (MB_CUR_MAX == 1 || rl_byte_oriented)
368 return (rl_backward_byte (count, key));
369
370 if (count < 0)
371 return (rl_forward_char (-count, key));
372
373 if (count > 0)
374 {
375 point = rl_point;
376
377 while (count > 0 && point > 0)
378 {
379 point = _rl_find_prev_mbchar (rl_line_buffer, point, MB_FIND_NONZERO);
380 count--;
381 }
382 if (count > 0)
383 {
384 rl_point = 0;
385 rl_ding ();
386 }
387 else
388 rl_point = point;
389 }
390
391 return 0;
392}
393#else
394int
395rl_backward_char (count, key)
396 int count, key;
397{
398 return (rl_backward_byte (count, key));
399}
400#endif
401
402/* Backwards compatibility. */
403int
404rl_backward (count, key)
405 int count, key;
406{
407 return (rl_backward_char (count, key));
408}
409
410/* Move to the beginning of the line. */
411int
412rl_beg_of_line (count, key)
413 int count __attribute__((unused)), key __attribute__((unused));
414{
415 rl_point = 0;
416 return 0;
417}
418
419/* Move to the end of the line. */
420int
421rl_end_of_line (count, key)
422 int count __attribute__((unused)), key __attribute__((unused));
423{
424 rl_point = rl_end;
425 return 0;
426}
427
428/* Move forward a word. We do what Emacs does. Handles multibyte chars. */
429int
430rl_forward_word (count, key)
431 int count, key;
432{
433 int c;
434
435 if (count < 0)
436 return (rl_backward_word (-count, key));
437
438 while (count)
439 {
440 if (rl_point == rl_end)
441 return 0;
442
443 /* If we are not in a word, move forward until we are in one.
444 Then, move forward until we hit a non-alphabetic character. */
445 c = _rl_char_value (rl_line_buffer, rl_point);
446
447 if (_rl_walphabetic (c) == 0)
448 {
449 rl_point = MB_NEXTCHAR (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO);
450 while (rl_point < rl_end)
451 {
452 c = _rl_char_value (rl_line_buffer, rl_point);
453 if (_rl_walphabetic (c))
454 break;
455 rl_point = MB_NEXTCHAR (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO);
456 }
457 }
458
459 if (rl_point == rl_end)
460 return 0;
461
462 rl_point = MB_NEXTCHAR (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO);
463 while (rl_point < rl_end)
464 {
465 c = _rl_char_value (rl_line_buffer, rl_point);
466 if (_rl_walphabetic (c) == 0)
467 break;
468 rl_point = MB_NEXTCHAR (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO);
469 }
470
471 --count;
472 }
473
474 return 0;
475}
476
477/* Move backward a word. We do what Emacs does. Handles multibyte chars. */
478int
479rl_backward_word (count, key)
480 int count, key;
481{
482 int c, p;
483
484 if (count < 0)
485 return (rl_forward_word (-count, key));
486
487 while (count)
488 {
489 if (rl_point == 0)
490 return 0;
491
492 /* Like rl_forward_word (), except that we look at the characters
493 just before point. */
494
495 p = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_NONZERO);
496 c = _rl_char_value (rl_line_buffer, p);
497
498 if (_rl_walphabetic (c) == 0)
499 {
500 rl_point = p;
501 while (rl_point > 0)
502 {
503 p = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_NONZERO);
504 c = _rl_char_value (rl_line_buffer, p);
505 if (_rl_walphabetic (c))
506 break;
507 rl_point = p;
508 }
509 }
510
511 while (rl_point)
512 {
513 p = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_NONZERO);
514 c = _rl_char_value (rl_line_buffer, p);
515 if (_rl_walphabetic (c) == 0)
516 break;
517 else
518 rl_point = p;
519 }
520
521 --count;
522 }
523
524 return 0;
525}
526
527/* Clear the current line. Numeric argument to C-l does this. */
528int
529rl_refresh_line (ignore1, ignore2)
530 int ignore1 __attribute__((unused)), ignore2 __attribute__((unused));
531{
532 int curr_line;
533
534 curr_line = _rl_current_display_line ();
535
536 _rl_move_vert (curr_line);
537 _rl_move_cursor_relative (0, rl_line_buffer); /* XXX is this right */
538
539 _rl_clear_to_eol (0); /* arg of 0 means to not use spaces */
540
541 rl_forced_update_display ();
542 rl_display_fixed = 1;
543
544 return 0;
545}
546
547/* C-l typed to a line without quoting clears the screen, and then reprints
548 the prompt and the current input line. Given a numeric arg, redraw only
549 the current line. */
550int
551rl_clear_screen (count, key)
552 int count, key;
553{
554 if (rl_explicit_arg)
555 {
556 rl_refresh_line (count, key);
557 return 0;
558 }
559
560 _rl_clear_screen (); /* calls termcap function to clear screen */
561 rl_forced_update_display ();
562 rl_display_fixed = 1;
563
564 return 0;
565}
566
567int
568rl_arrow_keys (count, c)
569 int count, c __attribute__((unused));
570{
571 int ch;
572
573 RL_SETSTATE(RL_STATE_MOREINPUT);
574 ch = rl_read_key ();
575 RL_UNSETSTATE(RL_STATE_MOREINPUT);
576
577 switch (_rl_to_upper (ch))
578 {
579 case 'A':
580 rl_get_previous_history (count, ch);
581 break;
582
583 case 'B':
584 rl_get_next_history (count, ch);
585 break;
586
587 case 'C':
588 if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
589 rl_forward_char (count, ch);
590 else
591 rl_forward_byte (count, ch);
592 break;
593
594 case 'D':
595 if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
596 rl_backward_char (count, ch);
597 else
598 rl_backward_byte (count, ch);
599 break;
600
601 default:
602 rl_ding ();
603 }
604
605 return 0;
606}
607
608/* **************************************************************** */
609/* */
610/* Text commands */
611/* */
612/* **************************************************************** */
613
614#ifdef HANDLE_MULTIBYTE
615static char pending_bytes[MB_LEN_MAX];
616static int pending_bytes_length = 0;
617static mbstate_t ps;
618#endif
619
620/* Insert the character C at the current location, moving point forward.
621 If C introduces a multibyte sequence, we read the whole sequence and
622 then insert the multibyte char into the line buffer. */
623int
624_rl_insert_char (count, c)
625 int count, c;
626{
627 register int i;
628 char *string;
629#ifdef HANDLE_MULTIBYTE
630 int string_size;
631 char incoming[MB_LEN_MAX + 1];
632 int incoming_length = 0;
633 mbstate_t ps_back;
634 static int stored_count = 0;
635#endif
636
637 if (count <= 0)
638 return 0;
639
640#if defined (HANDLE_MULTIBYTE)
641 if (MB_CUR_MAX == 1 || rl_byte_oriented)
642 {
643 incoming[0] = c;
644 incoming[1] = '\0';
645 incoming_length = 1;
646 }
647 else
648 {
649 wchar_t wc;
650 size_t ret;
651
652 if (stored_count <= 0)
653 stored_count = count;
654 else
655 count = stored_count;
656
657 ps_back = ps;
658 pending_bytes[pending_bytes_length++] = c;
659 ret = mbrtowc (&wc, pending_bytes, pending_bytes_length, &ps);
660
661 if (ret == (size_t)-2)
662 {
663 /* Bytes too short to compose character, try to wait for next byte.
664 Restore the state of the byte sequence, because in this case the
665 effect of mbstate is undefined. */
666 ps = ps_back;
667 return 1;
668 }
669 else if (ret == (size_t)-1)
670 {
671 /* Invalid byte sequence for the current locale. Treat first byte
672 as a single character. */
673 incoming[0] = pending_bytes[0];
674 incoming[1] = '\0';
675 incoming_length = 1;
676 pending_bytes_length--;
677 memmove (pending_bytes, pending_bytes + 1, pending_bytes_length);
678 /* Clear the state of the byte sequence, because in this case the
679 effect of mbstate is undefined. */
680 memset (&ps, 0, sizeof (mbstate_t));
681 }
682 else if (ret == (size_t)0)
683 {
684 incoming[0] = '\0';
685 incoming_length = 0;
686 pending_bytes_length--;
687 /* Clear the state of the byte sequence, because in this case the
688 effect of mbstate is undefined. */
689 memset (&ps, 0, sizeof (mbstate_t));
690 }
691 else
692 {
693 /* We successfully read a single multibyte character. */
694 memcpy (incoming, pending_bytes, pending_bytes_length);
695 incoming[pending_bytes_length] = '\0';
696 incoming_length = pending_bytes_length;
697 pending_bytes_length = 0;
698 }
699 }
700#endif /* HANDLE_MULTIBYTE */
701
702 /* If we can optimize, then do it. But don't let people crash
703 readline because of extra large arguments. */
704 if (count > 1 && count <= 1024)
705 {
706#if defined (HANDLE_MULTIBYTE)
707 string_size = count * incoming_length;
708 string = (char *)xmalloc (1 + string_size);
709
710 i = 0;
711 while (i < string_size)
712 {
713 strncpy (string + i, incoming, incoming_length);
714 i += incoming_length;
715 }
716 incoming_length = 0;
717 stored_count = 0;
718#else /* !HANDLE_MULTIBYTE */
719 string = (char *)xmalloc (1 + count);
720
721 for (i = 0; i < count; i++)
722 string[i] = c;
723#endif /* !HANDLE_MULTIBYTE */
724
725 string[i] = '\0';
726 rl_insert_text (string);
727 free (string);
728
729 return 0;
730 }
731
732 if (count > 1024)
733 {
734 int decreaser;
735#if defined (HANDLE_MULTIBYTE)
736 string_size = incoming_length * 1024;
737 string = (char *)xmalloc (1 + string_size);
738
739 i = 0;
740 while (i < string_size)
741 {
742 strncpy (string + i, incoming, incoming_length);
743 i += incoming_length;
744 }
745
746 while (count)
747 {
748 decreaser = (count > 1024) ? 1024 : count;
749 string[decreaser*incoming_length] = '\0';
750 rl_insert_text (string);
751 count -= decreaser;
752 }
753
754 free (string);
755 incoming_length = 0;
756 stored_count = 0;
757#else /* !HANDLE_MULTIBYTE */
758 char str[1024+1];
759
760 for (i = 0; i < 1024; i++)
761 str[i] = c;
762
763 while (count)
764 {
765 decreaser = (count > 1024 ? 1024 : count);
766 str[decreaser] = '\0';
767 rl_insert_text (str);
768 count -= decreaser;
769 }
770#endif /* !HANDLE_MULTIBYTE */
771
772 return 0;
773 }
774
775 if (MB_CUR_MAX == 1 || rl_byte_oriented)
776 {
777 /* We are inserting a single character.
778 If there is pending input, then make a string of all of the
779 pending characters that are bound to rl_insert, and insert
780 them all. */
781 if (_rl_any_typein ())
782 _rl_insert_typein (c);
783 else
784 {
785 /* Inserting a single character. */
786 char str[2];
787
788 str[1] = '\0';
789 str[0] = c;
790 rl_insert_text (str);
791 }
792 }
793#if defined (HANDLE_MULTIBYTE)
794 else
795 {
796 rl_insert_text (incoming);
797 stored_count = 0;
798 }
799#endif
800
801 return 0;
802}
803
804/* Overwrite the character at point (or next COUNT characters) with C.
805 If C introduces a multibyte character sequence, read the entire sequence
806 before starting the overwrite loop. */
807int
808_rl_overwrite_char (count, c)
809 int count, c;
810{
811 int i;
812#if defined (HANDLE_MULTIBYTE)
813 char mbkey[MB_LEN_MAX];
814
815 /* Read an entire multibyte character sequence to insert COUNT times. */
816 if (count > 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0)
817 _rl_read_mbstring (c, mbkey, MB_LEN_MAX);
818#endif
819
820 rl_begin_undo_group ();
821
822 for (i = 0; i < count; i++)
823 {
824#if defined (HANDLE_MULTIBYTE)
825 if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
826 rl_insert_text (mbkey);
827 else
828#endif
829 _rl_insert_char (1, c);
830
831 if (rl_point < rl_end)
832 rl_delete (1, c);
833 }
834
835 rl_end_undo_group ();
836
837 return 0;
838}
839
840int
841rl_insert (count, c)
842 int count, c;
843{
844 return (rl_insert_mode == RL_IM_INSERT ? _rl_insert_char (count, c)
845 : _rl_overwrite_char (count, c));
846}
847
848/* Insert the next typed character verbatim. */
849static int
850_rl_insert_next (count)
851 int count;
852{
853 int c;
854
855 RL_SETSTATE(RL_STATE_MOREINPUT);
856 c = rl_read_key ();
857 RL_UNSETSTATE(RL_STATE_MOREINPUT);
858
859#if defined (HANDLE_SIGNALS)
860 if (RL_ISSTATE (RL_STATE_CALLBACK) == 0)
861 _rl_restore_tty_signals ();
862#endif
863
864 return (_rl_insert_char (count, c));
865}
866
867#if defined (READLINE_CALLBACKS)
868static int
869_rl_insert_next_callback (data)
870 _rl_callback_generic_arg *data;
871{
872 int count;
873
874 count = data->count;
875
876 /* Deregister function, let rl_callback_read_char deallocate data */
877 _rl_callback_func = 0;
878 _rl_want_redisplay = 1;
879
880 return _rl_insert_next (count);
881}
882#endif
883
884int
885rl_quoted_insert (count, key)
886 int count, key __attribute__((unused));
887{
888 /* Let's see...should the callback interface futz with signal handling? */
889#if defined (HANDLE_SIGNALS)
890 if (RL_ISSTATE (RL_STATE_CALLBACK) == 0)
891 _rl_disable_tty_signals ();
892#endif
893
894#if defined (READLINE_CALLBACKS)
895 if (RL_ISSTATE (RL_STATE_CALLBACK))
896 {
897 _rl_callback_data = _rl_callback_data_alloc (count);
898 _rl_callback_func = _rl_insert_next_callback;
899 return (0);
900 }
901#endif
902
903 return _rl_insert_next (count);
904}
905
906/* Insert a tab character. */
907int
908rl_tab_insert (count, key)
909 int count, key __attribute__((unused));
910{
911 return (_rl_insert_char (count, '\t'));
912}
913
914/* What to do when a NEWLINE is pressed. We accept the whole line.
915 KEY is the key that invoked this command. I guess it could have
916 meaning in the future. */
917int
918rl_newline (count, key)
919 int count __attribute__((unused)), key __attribute__((unused));
920{
921 rl_done = 1;
922
923 if (_rl_history_preserve_point)
924 _rl_history_saved_point = (rl_point == rl_end) ? -1 : rl_point;
925
926 RL_SETSTATE(RL_STATE_DONE);
927
928#if defined (VI_MODE)
929 if (rl_editing_mode == vi_mode)
930 {
931 _rl_vi_done_inserting ();
932 if (_rl_vi_textmod_command (_rl_vi_last_command) == 0) /* XXX */
933 _rl_vi_reset_last ();
934 }
935#endif /* VI_MODE */
936
937 /* If we've been asked to erase empty lines, suppress the final update,
938 since _rl_update_final calls rl_crlf(). */
939 if (rl_erase_empty_line && rl_point == 0 && rl_end == 0)
940 return 0;
941
942 if (readline_echoing_p)
943 _rl_update_final ();
944 return 0;
945}
946
947/* What to do for some uppercase characters, like meta characters,
948 and some characters appearing in emacs_ctlx_keymap. This function
949 is just a stub, you bind keys to it and the code in _rl_dispatch ()
950 is special cased. */
951int
952rl_do_lowercase_version (ignore1, ignore2)
953 int ignore1 __attribute__((unused)), ignore2 __attribute__((unused));
954{
955 return 0;
956}
957
958/* This is different from what vi does, so the code's not shared. Emacs
959 rubout in overwrite mode has one oddity: it replaces a control
960 character that's displayed as two characters (^X) with two spaces. */
961int
962_rl_overwrite_rubout (count, key)
963 int count, key;
964{
965 int opoint;
966 int i, l;
967
968 if (rl_point == 0)
969 {
970 rl_ding ();
971 return 1;
972 }
973
974 opoint = rl_point;
975
976 /* L == number of spaces to insert */
977 for (i = l = 0; i < count; i++)
978 {
979 rl_backward_char (1, key);
980 l += rl_character_len (rl_line_buffer[rl_point], rl_point); /* not exactly right */
981 }
982
983 rl_begin_undo_group ();
984
985 if (count > 1 || rl_explicit_arg)
986 rl_kill_text (opoint, rl_point);
987 else
988 rl_delete_text (opoint, rl_point);
989
990 /* Emacs puts point at the beginning of the sequence of spaces. */
991 if (rl_point < rl_end)
992 {
993 opoint = rl_point;
994 _rl_insert_char (l, ' ');
995 rl_point = opoint;
996 }
997
998 rl_end_undo_group ();
999
1000 return 0;
1001}
1002
1003/* Rubout the character behind point. */
1004int
1005rl_rubout (count, key)
1006 int count, key;
1007{
1008 if (count < 0)
1009 return (rl_delete (-count, key));
1010
1011 if (!rl_point)
1012 {
1013 rl_ding ();
1014 return -1;
1015 }
1016
1017 if (rl_insert_mode == RL_IM_OVERWRITE)
1018 return (_rl_overwrite_rubout (count, key));
1019
1020 return (_rl_rubout_char (count, key));
1021}
1022
1023int
1024_rl_rubout_char (count, key)
1025 int count, key;
1026{
1027 int orig_point;
1028 unsigned char c;
1029
1030 /* Duplicated code because this is called from other parts of the library. */
1031 if (count < 0)
1032 return (rl_delete (-count, key));
1033
1034 if (rl_point == 0)
1035 {
1036 rl_ding ();
1037 return -1;
1038 }
1039
1040 orig_point = rl_point;
1041 if (count > 1 || rl_explicit_arg)
1042 {
1043 rl_backward_char (count, key);
1044 rl_kill_text (orig_point, rl_point);
1045 }
1046 else if (MB_CUR_MAX == 1 || rl_byte_oriented)
1047 {
1048 c = rl_line_buffer[--rl_point];
1049 rl_delete_text (rl_point, orig_point);
1050 /* The erase-at-end-of-line hack is of questionable merit now. */
1051 if (rl_point == rl_end && ISPRINT (c) && _rl_last_c_pos)
1052 {
1053 int l;
1054 l = rl_character_len (c, rl_point);
1055 _rl_erase_at_end_of_line (l);
1056 }
1057 }
1058 else
1059 {
1060 rl_point = _rl_find_prev_mbchar (rl_line_buffer, rl_point, MB_FIND_NONZERO);
1061 rl_delete_text (rl_point, orig_point);
1062 }
1063
1064 return 0;
1065}
1066
1067/* Delete the character under the cursor. Given a numeric argument,
1068 kill that many characters instead. */
1069int
1070rl_delete (count, key)
1071 int count, key;
1072{
1073 int xpoint;
1074
1075 if (count < 0)
1076 return (_rl_rubout_char (-count, key));
1077
1078 if (rl_point == rl_end)
1079 {
1080 rl_ding ();
1081 return -1;
1082 }
1083
1084 if (count > 1 || rl_explicit_arg)
1085 {
1086 xpoint = rl_point;
1087 if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
1088 rl_forward_char (count, key);
1089 else
1090 rl_forward_byte (count, key);
1091
1092 rl_kill_text (xpoint, rl_point);
1093 rl_point = xpoint;
1094 }
1095 else
1096 {
1097 xpoint = MB_NEXTCHAR (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO);
1098 rl_delete_text (rl_point, xpoint);
1099 }
1100 return 0;
1101}
1102
1103/* Delete the character under the cursor, unless the insertion
1104 point is at the end of the line, in which case the character
1105 behind the cursor is deleted. COUNT is obeyed and may be used
1106 to delete forward or backward that many characters. */
1107int
1108rl_rubout_or_delete (count, key)
1109 int count, key;
1110{
1111 if (rl_end != 0 && rl_point == rl_end)
1112 return (_rl_rubout_char (count, key));
1113 else
1114 return (rl_delete (count, key));
1115}
1116
1117/* Delete all spaces and tabs around point. */
1118int
1119rl_delete_horizontal_space (count, ignore)
1120 int count __attribute__((unused)), ignore __attribute__((unused));
1121{
1122 int start = rl_point;
1123
1124 while (rl_point && whitespace (rl_line_buffer[rl_point - 1]))
1125 rl_point--;
1126
1127 start = rl_point;
1128
1129 while (rl_point < rl_end && whitespace (rl_line_buffer[rl_point]))
1130 rl_point++;
1131
1132 if (start != rl_point)
1133 {
1134 rl_delete_text (start, rl_point);
1135 rl_point = start;
1136 }
1137
1138 if (rl_point < 0)
1139 rl_point = 0;
1140
1141 return 0;
1142}
1143
1144/* Like the tcsh editing function delete-char-or-list. The eof character
1145 is caught before this is invoked, so this really does the same thing as
1146 delete-char-or-list-or-eof, as long as it's bound to the eof character. */
1147int
1148rl_delete_or_show_completions (count, key)
1149 int count, key;
1150{
1151 if (rl_end != 0 && rl_point == rl_end)
1152 return (rl_possible_completions (count, key));
1153 else
1154 return (rl_delete (count, key));
1155}
1156
1157#ifndef RL_COMMENT_BEGIN_DEFAULT
1158#define RL_COMMENT_BEGIN_DEFAULT "#"
1159#endif
1160
1161/* Turn the current line into a comment in shell history.
1162 A K*rn shell style function. */
1163int
1164rl_insert_comment (count, key)
1165 int count __attribute__((unused)), key;
1166{
1167 const char *rl_comment_text;
1168 int rl_comment_len;
1169
1170 rl_beg_of_line (1, key);
1171 rl_comment_text = _rl_comment_begin ? _rl_comment_begin : (char*) RL_COMMENT_BEGIN_DEFAULT;
1172
1173 if (rl_explicit_arg == 0)
1174 rl_insert_text (rl_comment_text);
1175 else
1176 {
1177 rl_comment_len = strlen (rl_comment_text);
1178 if (STREQN (rl_comment_text, rl_line_buffer, rl_comment_len))
1179 rl_delete_text (rl_point, rl_point + rl_comment_len);
1180 else
1181 rl_insert_text (rl_comment_text);
1182 }
1183
1184 (*rl_redisplay_function) ();
1185 rl_newline (1, '\n');
1186
1187 return (0);
1188}
1189
1190/* **************************************************************** */
1191/* */
1192/* Changing Case */
1193/* */
1194/* **************************************************************** */
1195
1196/* The three kinds of things that we know how to do. */
1197#define UpCase 1
1198#define DownCase 2
1199#define CapCase 3
1200
1201/* Uppercase the word at point. */
1202int
1203rl_upcase_word (count, key)
1204 int count, key __attribute__((unused));
1205{
1206 return (rl_change_case (count, UpCase));
1207}
1208
1209/* Lowercase the word at point. */
1210int
1211rl_downcase_word (count, key)
1212 int count, key __attribute__((unused));
1213{
1214 return (rl_change_case (count, DownCase));
1215}
1216
1217/* Upcase the first letter, downcase the rest. */
1218int
1219rl_capitalize_word (count, key)
1220 int count, key __attribute__((unused));
1221{
1222 return (rl_change_case (count, CapCase));
1223}
1224
1225/* The meaty function.
1226 Change the case of COUNT words, performing OP on them.
1227 OP is one of UpCase, DownCase, or CapCase.
1228 If a negative argument is given, leave point where it started,
1229 otherwise, leave it where it moves to. */
1230static int
1231rl_change_case (count, op)
1232 int count, op;
1233{
1234 int start, next, end;
1235 int inword, c, nc, nop;
1236#if defined (HANDLE_MULTIBYTE)
1237 wchar_t wc, nwc;
1238 char mb[MB_LEN_MAX+1];
1239 int mlen;
1240 mbstate_t mps;
1241#endif
1242
1243 start = rl_point;
1244 rl_forward_word (count, 0);
1245 end = rl_point;
1246
1247 if (op != UpCase && op != DownCase && op != CapCase)
1248 {
1249 rl_ding ();
1250 return -1;
1251 }
1252
1253 if (count < 0)
1254 SWAP (start, end);
1255
1256#if defined (HANDLE_MULTIBYTE)
1257 memset (&mps, 0, sizeof (mbstate_t));
1258#endif
1259
1260 /* We are going to modify some text, so let's prepare to undo it. */
1261 rl_modifying (start, end);
1262
1263 inword = 0;
1264 while (start < end)
1265 {
1266 c = _rl_char_value (rl_line_buffer, start);
1267 /* This assumes that the upper and lower case versions are the same width. */
1268 next = MB_NEXTCHAR (rl_line_buffer, start, 1, MB_FIND_NONZERO);
1269
1270 if (_rl_walphabetic (c) == 0)
1271 {
1272 inword = 0;
1273 start = next;
1274 continue;
1275 }
1276
1277 if (op == CapCase)
1278 {
1279 nop = inword ? DownCase : UpCase;
1280 inword = 1;
1281 }
1282 else
1283 nop = op;
1284 if (MB_CUR_MAX == 1 || rl_byte_oriented || isascii (c))
1285 {
1286 nc = (nop == UpCase) ? _rl_to_upper (c) : _rl_to_lower (c);
1287 rl_line_buffer[start] = nc;
1288 }
1289#if defined (HANDLE_MULTIBYTE)
1290 else
1291 {
1292 mbrtowc (&wc, rl_line_buffer + start, end - start, &mps);
1293 nwc = (nop == UpCase) ? _rl_to_wupper (wc) : _rl_to_wlower (wc);
1294 if (nwc != wc) /* just skip unchanged characters */
1295 {
1296 mlen = wcrtomb (mb, nwc, &mps);
1297 if (mlen > 0)
1298 mb[mlen] = '\0';
1299 /* Assume the same width */
1300 strncpy (rl_line_buffer + start, mb, mlen);
1301 }
1302 }
1303#endif
1304
1305 start = next;
1306 }
1307
1308 rl_point = end;
1309 return 0;
1310}
1311
1312/* **************************************************************** */
1313/* */
1314/* Transposition */
1315/* */
1316/* **************************************************************** */
1317
1318/* Transpose the words at point. If point is at the end of the line,
1319 transpose the two words before point. */
1320int
1321rl_transpose_words (count, key)
1322 int count, key;
1323{
1324 char *word1, *word2;
1325 int w1_beg, w1_end, w2_beg, w2_end;
1326 int orig_point = rl_point;
1327
1328 if (!count)
1329 return 0;
1330
1331 /* Find the two words. */
1332 rl_forward_word (count, key);
1333 w2_end = rl_point;
1334 rl_backward_word (1, key);
1335 w2_beg = rl_point;
1336 rl_backward_word (count, key);
1337 w1_beg = rl_point;
1338 rl_forward_word (1, key);
1339 w1_end = rl_point;
1340
1341 /* Do some check to make sure that there really are two words. */
1342 if ((w1_beg == w2_beg) || (w2_beg < w1_end))
1343 {
1344 rl_ding ();
1345 rl_point = orig_point;
1346 return -1;
1347 }
1348
1349 /* Get the text of the words. */
1350 word1 = rl_copy_text (w1_beg, w1_end);
1351 word2 = rl_copy_text (w2_beg, w2_end);
1352
1353 /* We are about to do many insertions and deletions. Remember them
1354 as one operation. */
1355 rl_begin_undo_group ();
1356
1357 /* Do the stuff at word2 first, so that we don't have to worry
1358 about word1 moving. */
1359 rl_point = w2_beg;
1360 rl_delete_text (w2_beg, w2_end);
1361 rl_insert_text (word1);
1362
1363 rl_point = w1_beg;
1364 rl_delete_text (w1_beg, w1_end);
1365 rl_insert_text (word2);
1366
1367 /* This is exactly correct since the text before this point has not
1368 changed in length. */
1369 rl_point = w2_end;
1370
1371 /* I think that does it. */
1372 rl_end_undo_group ();
1373 free (word1);
1374 free (word2);
1375
1376 return 0;
1377}
1378
1379/* Transpose the characters at point. If point is at the end of the line,
1380 then transpose the characters before point. */
1381int
1382rl_transpose_chars (count, key)
1383 int count, key __attribute__((unused));
1384{
1385#if defined (HANDLE_MULTIBYTE)
1386 char *dummy;
1387 int i;
1388 int prev_point;
1389#else
1390 char dummy[2];
1391#endif
1392 int char_length;
1393
1394 if (count == 0)
1395 return 0;
1396
1397 if (!rl_point || rl_end < 2)
1398 {
1399 rl_ding ();
1400 return -1;
1401 }
1402
1403 rl_begin_undo_group ();
1404
1405 if (rl_point == rl_end)
1406 {
1407 rl_point = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_NONZERO);
1408 count = 1;
1409 }
1410
1411#if defined (HANDLE_MULTIBYTE)
1412 prev_point = rl_point;
1413#endif
1414 rl_point = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_NONZERO);
1415
1416#if defined (HANDLE_MULTIBYTE)
1417 char_length = prev_point - rl_point;
1418 dummy = (char *)xmalloc (char_length + 1);
1419 for (i = 0; i < char_length; i++)
1420 dummy[i] = rl_line_buffer[rl_point + i];
1421 dummy[i] = '\0';
1422#else
1423 dummy[0] = rl_line_buffer[rl_point];
1424 dummy[char_length = 1] = '\0';
1425#endif
1426
1427 rl_delete_text (rl_point, rl_point + char_length);
1428
1429 rl_point = _rl_find_next_mbchar (rl_line_buffer, rl_point, count, MB_FIND_NONZERO);
1430
1431 _rl_fix_point (0);
1432 rl_insert_text (dummy);
1433 rl_end_undo_group ();
1434
1435#if defined (HANDLE_MULTIBYTE)
1436 free (dummy);
1437#endif
1438
1439 return 0;
1440}
1441
1442/* **************************************************************** */
1443/* */
1444/* Character Searching */
1445/* */
1446/* **************************************************************** */
1447
1448int
1449#if defined (HANDLE_MULTIBYTE)
1450_rl_char_search_internal (count, dir, smbchar, len)
1451 int count, dir;
1452 char *smbchar;
1453 int len;
1454#else
1455_rl_char_search_internal (count, dir, schar)
1456 int count, dir, schar;
1457#endif
1458{
1459 int pos, inc;
1460#if defined (HANDLE_MULTIBYTE)
1461 int prepos;
1462#endif
1463
1464 pos = rl_point;
1465 inc = (dir < 0) ? -1 : 1;
1466 while (count)
1467 {
1468 if ((dir < 0 && pos <= 0) || (dir > 0 && pos >= rl_end))
1469 {
1470 rl_ding ();
1471 return -1;
1472 }
1473
1474#if defined (HANDLE_MULTIBYTE)
1475 pos = (inc > 0) ? _rl_find_next_mbchar (rl_line_buffer, pos, 1, MB_FIND_ANY)
1476 : _rl_find_prev_mbchar (rl_line_buffer, pos, MB_FIND_ANY);
1477#else
1478 pos += inc;
1479#endif
1480 do
1481 {
1482#if defined (HANDLE_MULTIBYTE)
1483 if (_rl_is_mbchar_matched (rl_line_buffer, pos, rl_end, smbchar, len))
1484#else
1485 if (rl_line_buffer[pos] == schar)
1486#endif
1487 {
1488 count--;
1489 if (dir < 0)
1490 rl_point = (dir == BTO) ? _rl_find_next_mbchar (rl_line_buffer, pos, 1, MB_FIND_ANY)
1491 : pos;
1492 else
1493 rl_point = (dir == FTO) ? _rl_find_prev_mbchar (rl_line_buffer, pos, MB_FIND_ANY)
1494 : pos;
1495 break;
1496 }
1497#if defined (HANDLE_MULTIBYTE)
1498 prepos = pos;
1499#endif
1500 }
1501#if defined (HANDLE_MULTIBYTE)
1502 while ((dir < 0) ? (pos = _rl_find_prev_mbchar (rl_line_buffer, pos, MB_FIND_ANY)) != prepos
1503 : (pos = _rl_find_next_mbchar (rl_line_buffer, pos, 1, MB_FIND_ANY)) != prepos);
1504#else
1505 while ((dir < 0) ? pos-- : ++pos < rl_end);
1506#endif
1507 }
1508 return (0);
1509}
1510
1511/* Search COUNT times for a character read from the current input stream.
1512 FDIR is the direction to search if COUNT is non-negative; otherwise
1513 the search goes in BDIR. So much is dependent on HANDLE_MULTIBYTE
1514 that there are two separate versions of this function. */
1515#if defined (HANDLE_MULTIBYTE)
1516static int
1517_rl_char_search (count, fdir, bdir)
1518 int count, fdir, bdir;
1519{
1520 char mbchar[MB_LEN_MAX];
1521 int mb_len;
1522
1523 mb_len = _rl_read_mbchar (mbchar, MB_LEN_MAX);
1524
1525 if (count < 0)
1526 return (_rl_char_search_internal (-count, bdir, mbchar, mb_len));
1527 else
1528 return (_rl_char_search_internal (count, fdir, mbchar, mb_len));
1529}
1530#else /* !HANDLE_MULTIBYTE */
1531static int
1532_rl_char_search (count, fdir, bdir)
1533 int count, fdir, bdir;
1534{
1535 int c;
1536
1537 RL_SETSTATE(RL_STATE_MOREINPUT);
1538 c = rl_read_key ();
1539 RL_UNSETSTATE(RL_STATE_MOREINPUT);
1540
1541 if (count < 0)
1542 return (_rl_char_search_internal (-count, bdir, c));
1543 else
1544 return (_rl_char_search_internal (count, fdir, c));
1545}
1546#endif /* !HANDLE_MULTIBYTE */
1547
1548#if defined (READLINE_CALLBACKS)
1549static int
1550_rl_char_search_callback (data)
1551 _rl_callback_generic_arg *data;
1552{
1553 _rl_callback_func = 0;
1554 _rl_want_redisplay = 1;
1555
1556 return (_rl_char_search (data->count, data->i1, data->i2));
1557}
1558#endif
1559
1560int
1561rl_char_search (count, key)
1562 int count, key __attribute__((unused));
1563{
1564#if defined (READLINE_CALLBACKS)
1565 if (RL_ISSTATE (RL_STATE_CALLBACK))
1566 {
1567 _rl_callback_data = _rl_callback_data_alloc (count);
1568 _rl_callback_data->i1 = FFIND;
1569 _rl_callback_data->i2 = BFIND;
1570 _rl_callback_func = _rl_char_search_callback;
1571 return (0);
1572 }
1573#endif
1574
1575 return (_rl_char_search (count, FFIND, BFIND));
1576}
1577
1578int
1579rl_backward_char_search (count, key)
1580 int count, key __attribute__((unused));
1581{
1582#if defined (READLINE_CALLBACKS)
1583 if (RL_ISSTATE (RL_STATE_CALLBACK))
1584 {
1585 _rl_callback_data = _rl_callback_data_alloc (count);
1586 _rl_callback_data->i1 = BFIND;
1587 _rl_callback_data->i2 = FFIND;
1588 _rl_callback_func = _rl_char_search_callback;
1589 return (0);
1590 }
1591#endif
1592
1593 return (_rl_char_search (count, BFIND, FFIND));
1594}
1595
1596/* **************************************************************** */
1597/* */
1598/* The Mark and the Region. */
1599/* */
1600/* **************************************************************** */
1601
1602/* Set the mark at POSITION. */
1603int
1604_rl_set_mark_at_pos (position)
1605 int position;
1606{
1607 if (position > rl_end)
1608 return -1;
1609
1610 rl_mark = position;
1611 return 0;
1612}
1613
1614/* A bindable command to set the mark. */
1615int
1616rl_set_mark (count, key)
1617 int count, key __attribute__((unused));
1618{
1619 return (_rl_set_mark_at_pos (rl_explicit_arg ? count : rl_point));
1620}
1621
1622/* Exchange the position of mark and point. */
1623int
1624rl_exchange_point_and_mark (count, key)
1625 int count __attribute__((unused)), key __attribute__((unused));
1626{
1627 if (rl_mark > rl_end)
1628 rl_mark = -1;
1629
1630 if (rl_mark == -1)
1631 {
1632 rl_ding ();
1633 return -1;
1634 }
1635 else
1636 SWAP (rl_point, rl_mark);
1637
1638 return 0;
1639}
1640