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d60d9f65 SS |
1 | /* readline.c -- a general facility for reading lines of input |
2 | with emacs style editing and completion. */ | |
3 | ||
4 | /* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc. | |
5 | ||
6 | This file is part of the GNU Readline Library, a library for | |
7 | reading lines of text with interactive input and history editing. | |
8 | ||
9 | The GNU Readline Library is free software; you can redistribute it | |
10 | and/or modify it under the terms of the GNU General Public License | |
11 | as published by the Free Software Foundation; either version 1, or | |
12 | (at your option) any later version. | |
13 | ||
14 | The GNU Readline Library is distributed in the hope that it will be | |
15 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
16 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | The GNU General Public License is often shipped with GNU software, and | |
20 | is generally kept in a file called COPYING or LICENSE. If you do not | |
21 | have a copy of the license, write to the Free Software Foundation, | |
22 | 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
23 | #define READLINE_LIBRARY | |
24 | ||
25 | #if defined (HAVE_CONFIG_H) | |
26 | # include <config.h> | |
27 | #endif | |
28 | ||
29 | #include <sys/types.h> | |
30 | #include "posixstat.h" | |
31 | #include <fcntl.h> | |
32 | #if defined (HAVE_SYS_FILE_H) | |
33 | # include <sys/file.h> | |
34 | #endif /* HAVE_SYS_FILE_H */ | |
35 | ||
36 | #if defined (HAVE_UNISTD_H) | |
37 | # include <unistd.h> | |
38 | #endif /* HAVE_UNISTD_H */ | |
39 | ||
40 | #if defined (HAVE_STDLIB_H) | |
41 | # include <stdlib.h> | |
42 | #else | |
43 | # include "ansi_stdlib.h" | |
44 | #endif /* HAVE_STDLIB_H */ | |
45 | ||
46 | #if defined (HAVE_LOCALE_H) | |
47 | # include <locale.h> | |
48 | #endif | |
49 | ||
50 | #include <signal.h> | |
51 | #include <stdio.h> | |
52 | #include "posixjmp.h" | |
53 | ||
54 | /* System-specific feature definitions and include files. */ | |
55 | #include "rldefs.h" | |
56 | ||
57 | #if defined (__EMX__) | |
58 | # define INCL_DOSPROCESS | |
59 | # include <os2.h> | |
60 | #endif /* __EMX__ */ | |
61 | ||
62 | /* Some standard library routines. */ | |
63 | #include "readline.h" | |
64 | #include "history.h" | |
65 | ||
66 | #ifndef RL_LIBRARY_VERSION | |
c862e87b | 67 | # define RL_LIBRARY_VERSION "4.0" |
d60d9f65 SS |
68 | #endif |
69 | ||
70 | /* Evaluates its arguments multiple times. */ | |
71 | #define SWAP(s, e) do { int t; t = s; s = e; e = t; } while (0) | |
72 | ||
73 | /* NOTE: Functions and variables prefixed with `_rl_' are | |
74 | pseudo-global: they are global so they can be shared | |
75 | between files in the readline library, but are not intended | |
76 | to be visible to readline callers. */ | |
77 | ||
78 | /* Variables and functions imported from terminal.c */ | |
79 | extern int _rl_init_terminal_io (); | |
80 | extern void _rl_enable_meta_key (); | |
81 | #ifdef _MINIX | |
82 | extern void _rl_output_character_function (); | |
83 | #else | |
84 | extern int _rl_output_character_function (); | |
85 | #endif | |
d60d9f65 SS |
86 | |
87 | extern int _rl_enable_meta; | |
88 | extern int _rl_term_autowrap; | |
89 | extern int screenwidth, screenheight, screenchars; | |
90 | ||
91 | /* Variables and functions imported from rltty.c. */ | |
92 | extern void rl_prep_terminal (), rl_deprep_terminal (); | |
93 | extern void rltty_set_default_bindings (); | |
94 | ||
95 | /* Functions imported from util.c. */ | |
96 | extern void _rl_abort_internal (); | |
97 | extern void rl_extend_line_buffer (); | |
98 | extern int alphabetic (); | |
99 | ||
100 | /* Functions imported from bind.c. */ | |
101 | extern void _rl_bind_if_unbound (); | |
d60d9f65 SS |
102 | |
103 | /* Functions imported from input.c. */ | |
104 | extern int _rl_any_typein (); | |
105 | extern void _rl_insert_typein (); | |
106 | extern int rl_read_key (); | |
107 | ||
108 | /* Functions imported from nls.c */ | |
109 | extern int _rl_init_eightbit (); | |
110 | ||
111 | /* Functions imported from shell.c */ | |
112 | extern char *get_env_value (); | |
113 | ||
114 | /* External redisplay functions and variables from display.c */ | |
115 | extern void _rl_move_vert (); | |
116 | extern void _rl_update_final (); | |
117 | extern void _rl_clear_to_eol (); | |
118 | extern void _rl_clear_screen (); | |
c862e87b | 119 | extern void _rl_erase_entire_line (); |
d60d9f65 SS |
120 | |
121 | extern void _rl_erase_at_end_of_line (); | |
122 | extern void _rl_move_cursor_relative (); | |
123 | ||
124 | extern int _rl_vis_botlin; | |
125 | extern int _rl_last_c_pos; | |
126 | extern int _rl_horizontal_scroll_mode; | |
127 | extern int rl_display_fixed; | |
128 | extern int _rl_suppress_redisplay; | |
129 | extern char *rl_display_prompt; | |
130 | ||
131 | /* Variables imported from complete.c. */ | |
132 | extern char *rl_completer_word_break_characters; | |
133 | extern char *rl_basic_word_break_characters; | |
134 | extern int rl_completion_query_items; | |
135 | extern int rl_complete_with_tilde_expansion; | |
136 | ||
137 | /* Variables and functions from macro.c. */ | |
138 | extern void _rl_add_macro_char (); | |
139 | extern void _rl_with_macro_input (); | |
140 | extern int _rl_next_macro_key (); | |
141 | extern int _rl_defining_kbd_macro; | |
142 | ||
143 | #if defined (VI_MODE) | |
144 | /* Functions imported from vi_mode.c. */ | |
145 | extern void _rl_vi_set_last (); | |
146 | extern void _rl_vi_reset_last (); | |
147 | extern void _rl_vi_done_inserting (); | |
148 | extern int _rl_vi_textmod_command (); | |
149 | extern void _rl_vi_initialize_line (); | |
150 | #endif /* VI_MODE */ | |
151 | ||
152 | extern UNDO_LIST *rl_undo_list; | |
153 | extern int _rl_doing_an_undo; | |
154 | ||
155 | /* Forward declarations used in this file. */ | |
156 | void _rl_free_history_entry (); | |
157 | ||
158 | int _rl_dispatch (); | |
159 | int _rl_init_argument (); | |
160 | ||
161 | static char *readline_internal (); | |
162 | static void readline_initialize_everything (); | |
163 | static void start_using_history (); | |
164 | static void bind_arrow_keys (); | |
165 | ||
166 | #if !defined (__GO32__) | |
167 | static void readline_default_bindings (); | |
168 | #endif /* !__GO32__ */ | |
169 | ||
170 | #if defined (__GO32__) | |
171 | # include <go32.h> | |
172 | # include <pc.h> | |
173 | # undef HANDLE_SIGNALS | |
174 | #endif /* __GO32__ */ | |
175 | ||
176 | extern char *xmalloc (), *xrealloc (); | |
177 | ||
178 | /* **************************************************************** */ | |
179 | /* */ | |
180 | /* Line editing input utility */ | |
181 | /* */ | |
182 | /* **************************************************************** */ | |
183 | ||
184 | char *rl_library_version = RL_LIBRARY_VERSION; | |
185 | ||
186 | /* A pointer to the keymap that is currently in use. | |
187 | By default, it is the standard emacs keymap. */ | |
188 | Keymap _rl_keymap = emacs_standard_keymap; | |
189 | ||
190 | /* The current style of editing. */ | |
191 | int rl_editing_mode = emacs_mode; | |
192 | ||
193 | /* Non-zero if we called this function from _rl_dispatch(). It's present | |
194 | so functions can find out whether they were called from a key binding | |
195 | or directly from an application. */ | |
196 | int rl_dispatching; | |
197 | ||
198 | /* Non-zero if the previous command was a kill command. */ | |
199 | int _rl_last_command_was_kill = 0; | |
200 | ||
201 | /* The current value of the numeric argument specified by the user. */ | |
202 | int rl_numeric_arg = 1; | |
203 | ||
204 | /* Non-zero if an argument was typed. */ | |
205 | int rl_explicit_arg = 0; | |
206 | ||
207 | /* Temporary value used while generating the argument. */ | |
208 | int rl_arg_sign = 1; | |
209 | ||
210 | /* Non-zero means we have been called at least once before. */ | |
211 | static int rl_initialized; | |
212 | ||
213 | /* If non-zero, this program is running in an EMACS buffer. */ | |
214 | static int running_in_emacs; | |
215 | ||
216 | /* The current offset in the current input line. */ | |
217 | int rl_point; | |
218 | ||
219 | /* Mark in the current input line. */ | |
220 | int rl_mark; | |
221 | ||
222 | /* Length of the current input line. */ | |
223 | int rl_end; | |
224 | ||
225 | /* Make this non-zero to return the current input_line. */ | |
226 | int rl_done; | |
227 | ||
228 | /* The last function executed by readline. */ | |
229 | Function *rl_last_func = (Function *)NULL; | |
230 | ||
231 | /* Top level environment for readline_internal (). */ | |
232 | procenv_t readline_top_level; | |
233 | ||
234 | /* The streams we interact with. */ | |
235 | FILE *_rl_in_stream, *_rl_out_stream; | |
236 | ||
237 | /* The names of the streams that we do input and output to. */ | |
238 | FILE *rl_instream = (FILE *)NULL; | |
239 | FILE *rl_outstream = (FILE *)NULL; | |
240 | ||
241 | /* Non-zero means echo characters as they are read. */ | |
242 | int readline_echoing_p = 1; | |
243 | ||
244 | /* Current prompt. */ | |
245 | char *rl_prompt; | |
246 | int rl_visible_prompt_length = 0; | |
247 | ||
248 | /* The number of characters read in order to type this complete command. */ | |
249 | int rl_key_sequence_length = 0; | |
250 | ||
251 | /* If non-zero, then this is the address of a function to call just | |
c862e87b | 252 | before readline_internal_setup () prints the first prompt. */ |
d60d9f65 SS |
253 | Function *rl_startup_hook = (Function *)NULL; |
254 | ||
c862e87b JM |
255 | /* If non-zero, this is the address of a function to call just before |
256 | readline_internal_setup () returns and readline_internal starts | |
257 | reading input characters. */ | |
258 | Function *rl_pre_input_hook = (Function *)NULL; | |
259 | ||
d60d9f65 SS |
260 | /* What we use internally. You should always refer to RL_LINE_BUFFER. */ |
261 | static char *the_line; | |
262 | ||
263 | /* The character that can generate an EOF. Really read from | |
264 | the terminal driver... just defaulted here. */ | |
265 | int _rl_eof_char = CTRL ('D'); | |
266 | ||
267 | /* Non-zero makes this the next keystroke to read. */ | |
268 | int rl_pending_input = 0; | |
269 | ||
270 | /* Pointer to a useful terminal name. */ | |
271 | char *rl_terminal_name = (char *)NULL; | |
272 | ||
273 | /* Non-zero means to always use horizontal scrolling in line display. */ | |
274 | int _rl_horizontal_scroll_mode = 0; | |
275 | ||
276 | /* Non-zero means to display an asterisk at the starts of history lines | |
277 | which have been modified. */ | |
278 | int _rl_mark_modified_lines = 0; | |
279 | ||
280 | /* The style of `bell' notification preferred. This can be set to NO_BELL, | |
281 | AUDIBLE_BELL, or VISIBLE_BELL. */ | |
282 | int _rl_bell_preference = AUDIBLE_BELL; | |
283 | ||
284 | /* String inserted into the line by rl_insert_comment (). */ | |
285 | char *_rl_comment_begin; | |
286 | ||
287 | /* Keymap holding the function currently being executed. */ | |
288 | Keymap rl_executing_keymap; | |
289 | ||
c862e87b JM |
290 | /* Non-zero means to erase entire line, including prompt, on empty input lines. */ |
291 | int rl_erase_empty_line = 0; | |
292 | ||
d60d9f65 SS |
293 | /* Line buffer and maintenence. */ |
294 | char *rl_line_buffer = (char *)NULL; | |
295 | int rl_line_buffer_len = 0; | |
296 | ||
297 | /* Forward declarations used by the display and termcap code. */ | |
298 | ||
299 | /* **************************************************************** */ | |
300 | /* */ | |
301 | /* `Forward' declarations */ | |
302 | /* */ | |
303 | /* **************************************************************** */ | |
304 | ||
305 | /* Non-zero means do not parse any lines other than comments and | |
306 | parser directives. */ | |
307 | unsigned char _rl_parsing_conditionalized_out = 0; | |
308 | ||
309 | /* Non-zero means to convert characters with the meta bit set to | |
310 | escape-prefixed characters so we can indirect through | |
311 | emacs_meta_keymap or vi_escape_keymap. */ | |
312 | int _rl_convert_meta_chars_to_ascii = 1; | |
313 | ||
314 | /* Non-zero means to output characters with the meta bit set directly | |
315 | rather than as a meta-prefixed escape sequence. */ | |
316 | int _rl_output_meta_chars = 0; | |
317 | ||
318 | /* **************************************************************** */ | |
319 | /* */ | |
320 | /* Top Level Functions */ | |
321 | /* */ | |
322 | /* **************************************************************** */ | |
323 | ||
324 | /* Non-zero means treat 0200 bit in terminal input as Meta bit. */ | |
325 | int _rl_meta_flag = 0; /* Forward declaration */ | |
326 | ||
327 | /* Read a line of input. Prompt with PROMPT. An empty PROMPT means | |
328 | none. A return value of NULL means that EOF was encountered. */ | |
329 | char * | |
330 | readline (prompt) | |
331 | char *prompt; | |
332 | { | |
333 | char *value; | |
334 | ||
335 | rl_prompt = prompt; | |
336 | ||
337 | /* If we are at EOF return a NULL string. */ | |
338 | if (rl_pending_input == EOF) | |
339 | { | |
340 | rl_pending_input = 0; | |
341 | return ((char *)NULL); | |
342 | } | |
343 | ||
344 | rl_visible_prompt_length = rl_expand_prompt (rl_prompt); | |
345 | ||
346 | rl_initialize (); | |
347 | (*rl_prep_term_function) (_rl_meta_flag); | |
348 | ||
349 | #if defined (HANDLE_SIGNALS) | |
350 | rl_set_signals (); | |
351 | #endif | |
352 | ||
353 | value = readline_internal (); | |
354 | (*rl_deprep_term_function) (); | |
355 | ||
356 | #if defined (HANDLE_SIGNALS) | |
357 | rl_clear_signals (); | |
358 | #endif | |
359 | ||
360 | return (value); | |
361 | } | |
362 | ||
363 | #if defined (READLINE_CALLBACKS) | |
364 | # define STATIC_CALLBACK | |
365 | #else | |
366 | # define STATIC_CALLBACK static | |
367 | #endif | |
368 | ||
369 | STATIC_CALLBACK void | |
370 | readline_internal_setup () | |
371 | { | |
372 | _rl_in_stream = rl_instream; | |
373 | _rl_out_stream = rl_outstream; | |
374 | ||
375 | if (rl_startup_hook) | |
376 | (*rl_startup_hook) (); | |
377 | ||
378 | if (readline_echoing_p == 0) | |
379 | { | |
380 | if (rl_prompt) | |
381 | { | |
382 | fprintf (_rl_out_stream, "%s", rl_prompt); | |
383 | fflush (_rl_out_stream); | |
384 | } | |
385 | } | |
386 | else | |
387 | { | |
388 | rl_on_new_line (); | |
389 | (*rl_redisplay_function) (); | |
390 | #if defined (VI_MODE) | |
391 | if (rl_editing_mode == vi_mode) | |
392 | rl_vi_insertion_mode (1, 0); | |
393 | #endif /* VI_MODE */ | |
394 | } | |
c862e87b JM |
395 | |
396 | if (rl_pre_input_hook) | |
397 | (*rl_pre_input_hook) (); | |
d60d9f65 SS |
398 | } |
399 | ||
400 | STATIC_CALLBACK char * | |
401 | readline_internal_teardown (eof) | |
402 | int eof; | |
403 | { | |
404 | char *temp; | |
405 | HIST_ENTRY *entry; | |
406 | ||
407 | /* Restore the original of this history line, iff the line that we | |
408 | are editing was originally in the history, AND the line has changed. */ | |
409 | entry = current_history (); | |
410 | ||
411 | if (entry && rl_undo_list) | |
412 | { | |
413 | temp = savestring (the_line); | |
414 | rl_revert_line (1, 0); | |
c862e87b | 415 | entry = replace_history_entry (where_history (), the_line, (histdata_t)NULL); |
d60d9f65 SS |
416 | _rl_free_history_entry (entry); |
417 | ||
418 | strcpy (the_line, temp); | |
419 | free (temp); | |
420 | } | |
421 | ||
422 | /* At any rate, it is highly likely that this line has an undo list. Get | |
423 | rid of it now. */ | |
424 | if (rl_undo_list) | |
425 | free_undo_list (); | |
426 | ||
427 | return (eof ? (char *)NULL : savestring (the_line)); | |
428 | } | |
429 | ||
430 | STATIC_CALLBACK int | |
431 | #if defined (READLINE_CALLBACKS) | |
432 | readline_internal_char () | |
433 | #else | |
434 | readline_internal_charloop () | |
435 | #endif | |
436 | { | |
437 | static int lastc, eof_found; | |
438 | int c, code, lk; | |
439 | ||
440 | lastc = -1; | |
441 | eof_found = 0; | |
442 | ||
443 | #if !defined (READLINE_CALLBACKS) | |
444 | while (rl_done == 0) | |
445 | { | |
446 | #endif | |
447 | lk = _rl_last_command_was_kill; | |
448 | ||
449 | code = setjmp (readline_top_level); | |
450 | ||
451 | if (code) | |
452 | (*rl_redisplay_function) (); | |
453 | ||
454 | if (rl_pending_input == 0) | |
455 | { | |
456 | /* Then initialize the argument and number of keys read. */ | |
457 | _rl_init_argument (); | |
458 | rl_key_sequence_length = 0; | |
459 | } | |
460 | ||
461 | c = rl_read_key (); | |
462 | ||
463 | /* EOF typed to a non-blank line is a <NL>. */ | |
464 | if (c == EOF && rl_end) | |
465 | c = NEWLINE; | |
466 | ||
467 | /* The character _rl_eof_char typed to blank line, and not as the | |
468 | previous character is interpreted as EOF. */ | |
469 | if (((c == _rl_eof_char && lastc != c) || c == EOF) && !rl_end) | |
470 | { | |
471 | #if defined (READLINE_CALLBACKS) | |
472 | return (rl_done = 1); | |
473 | #else | |
474 | eof_found = 1; | |
475 | break; | |
476 | #endif | |
477 | } | |
478 | ||
479 | lastc = c; | |
480 | _rl_dispatch (c, _rl_keymap); | |
481 | ||
482 | /* If there was no change in _rl_last_command_was_kill, then no kill | |
483 | has taken place. Note that if input is pending we are reading | |
484 | a prefix command, so nothing has changed yet. */ | |
485 | if (rl_pending_input == 0 && lk == _rl_last_command_was_kill) | |
486 | _rl_last_command_was_kill = 0; | |
487 | ||
488 | #if defined (VI_MODE) | |
489 | /* In vi mode, when you exit insert mode, the cursor moves back | |
490 | over the previous character. We explicitly check for that here. */ | |
491 | if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap) | |
492 | rl_vi_check (); | |
493 | #endif /* VI_MODE */ | |
494 | ||
495 | if (rl_done == 0) | |
496 | (*rl_redisplay_function) (); | |
497 | ||
c862e87b JM |
498 | /* If the application writer has told us to erase the entire line if |
499 | the only character typed was something bound to rl_newline, do so. */ | |
500 | if (rl_erase_empty_line && rl_done && rl_last_func == rl_newline && | |
501 | rl_point == 0 && rl_end == 0) | |
502 | _rl_erase_entire_line (); | |
503 | ||
d60d9f65 SS |
504 | #if defined (READLINE_CALLBACKS) |
505 | return 0; | |
506 | #else | |
507 | } | |
508 | ||
509 | return (eof_found); | |
510 | #endif | |
511 | } | |
512 | ||
513 | #if defined (READLINE_CALLBACKS) | |
514 | static int | |
515 | readline_internal_charloop () | |
516 | { | |
c862e87b | 517 | int eof = 1; |
d60d9f65 SS |
518 | |
519 | while (rl_done == 0) | |
520 | eof = readline_internal_char (); | |
521 | return (eof); | |
522 | } | |
523 | #endif /* READLINE_CALLBACKS */ | |
524 | ||
525 | /* Read a line of input from the global rl_instream, doing output on | |
526 | the global rl_outstream. | |
527 | If rl_prompt is non-null, then that is our prompt. */ | |
528 | static char * | |
529 | readline_internal () | |
530 | { | |
531 | int eof; | |
532 | ||
533 | readline_internal_setup (); | |
534 | eof = readline_internal_charloop (); | |
535 | return (readline_internal_teardown (eof)); | |
536 | } | |
537 | ||
538 | void | |
539 | _rl_init_line_state () | |
540 | { | |
541 | rl_point = rl_end = 0; | |
542 | the_line = rl_line_buffer; | |
543 | the_line[0] = 0; | |
544 | } | |
545 | ||
546 | void | |
547 | _rl_set_the_line () | |
548 | { | |
549 | the_line = rl_line_buffer; | |
550 | } | |
551 | ||
552 | /* Do the command associated with KEY in MAP. | |
553 | If the associated command is really a keymap, then read | |
554 | another key, and dispatch into that map. */ | |
555 | int | |
556 | _rl_dispatch (key, map) | |
557 | register int key; | |
558 | Keymap map; | |
559 | { | |
560 | int r, newkey; | |
561 | char *macro; | |
562 | Function *func; | |
563 | ||
564 | if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii) | |
565 | { | |
566 | if (map[ESC].type == ISKMAP) | |
567 | { | |
568 | if (_rl_defining_kbd_macro) | |
569 | _rl_add_macro_char (ESC); | |
570 | map = FUNCTION_TO_KEYMAP (map, ESC); | |
571 | key = UNMETA (key); | |
572 | rl_key_sequence_length += 2; | |
573 | return (_rl_dispatch (key, map)); | |
574 | } | |
575 | else | |
576 | ding (); | |
577 | return 0; | |
578 | } | |
579 | ||
580 | if (_rl_defining_kbd_macro) | |
581 | _rl_add_macro_char (key); | |
582 | ||
583 | r = 0; | |
584 | switch (map[key].type) | |
585 | { | |
586 | case ISFUNC: | |
587 | func = map[key].function; | |
588 | if (func != (Function *)NULL) | |
589 | { | |
590 | /* Special case rl_do_lowercase_version (). */ | |
591 | if (func == rl_do_lowercase_version) | |
592 | return (_rl_dispatch (_rl_to_lower (key), map)); | |
593 | ||
594 | rl_executing_keymap = map; | |
595 | ||
596 | #if 0 | |
597 | _rl_suppress_redisplay = (map[key].function == rl_insert) && _rl_input_available (); | |
598 | #endif | |
599 | ||
600 | rl_dispatching = 1; | |
601 | r = (*map[key].function)(rl_numeric_arg * rl_arg_sign, key); | |
602 | rl_dispatching = 0; | |
603 | ||
604 | /* If we have input pending, then the last command was a prefix | |
605 | command. Don't change the state of rl_last_func. Otherwise, | |
606 | remember the last command executed in this variable. */ | |
607 | if (!rl_pending_input && map[key].function != rl_digit_argument) | |
608 | rl_last_func = map[key].function; | |
609 | } | |
610 | else | |
611 | { | |
612 | _rl_abort_internal (); | |
613 | return -1; | |
614 | } | |
615 | break; | |
616 | ||
617 | case ISKMAP: | |
618 | if (map[key].function != (Function *)NULL) | |
619 | { | |
620 | rl_key_sequence_length++; | |
621 | newkey = rl_read_key (); | |
622 | r = _rl_dispatch (newkey, FUNCTION_TO_KEYMAP (map, key)); | |
623 | } | |
624 | else | |
625 | { | |
626 | _rl_abort_internal (); | |
627 | return -1; | |
628 | } | |
629 | break; | |
630 | ||
631 | case ISMACR: | |
632 | if (map[key].function != (Function *)NULL) | |
633 | { | |
634 | macro = savestring ((char *)map[key].function); | |
635 | _rl_with_macro_input (macro); | |
636 | return 0; | |
637 | } | |
638 | break; | |
639 | } | |
640 | #if defined (VI_MODE) | |
641 | if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap && | |
642 | _rl_vi_textmod_command (key)) | |
643 | _rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign); | |
644 | #endif | |
645 | return (r); | |
646 | } | |
647 | ||
648 | /* **************************************************************** */ | |
649 | /* */ | |
650 | /* Initializations */ | |
651 | /* */ | |
652 | /* **************************************************************** */ | |
653 | ||
654 | /* Initialize readline (and terminal if not already). */ | |
655 | int | |
656 | rl_initialize () | |
657 | { | |
658 | /* If we have never been called before, initialize the | |
659 | terminal and data structures. */ | |
660 | if (!rl_initialized) | |
661 | { | |
662 | readline_initialize_everything (); | |
663 | rl_initialized++; | |
664 | } | |
665 | ||
666 | /* Initalize the current line information. */ | |
667 | _rl_init_line_state (); | |
668 | ||
669 | /* We aren't done yet. We haven't even gotten started yet! */ | |
670 | rl_done = 0; | |
671 | ||
672 | /* Tell the history routines what is going on. */ | |
673 | start_using_history (); | |
674 | ||
675 | /* Make the display buffer match the state of the line. */ | |
676 | rl_reset_line_state (); | |
677 | ||
678 | /* No such function typed yet. */ | |
679 | rl_last_func = (Function *)NULL; | |
680 | ||
681 | /* Parsing of key-bindings begins in an enabled state. */ | |
682 | _rl_parsing_conditionalized_out = 0; | |
683 | ||
684 | #if defined (VI_MODE) | |
685 | if (rl_editing_mode == vi_mode) | |
686 | _rl_vi_initialize_line (); | |
687 | #endif | |
688 | ||
689 | return 0; | |
690 | } | |
691 | ||
692 | #if defined (__EMX__) | |
693 | static void | |
694 | _emx_build_environ () | |
695 | { | |
696 | TIB *tibp; | |
697 | PIB *pibp; | |
698 | char *t, **tp; | |
699 | int c; | |
700 | ||
701 | DosGetInfoBlocks (&tibp, &pibp); | |
702 | t = pibp->pib_pchenv; | |
703 | for (c = 1; *t; c++) | |
704 | t += strlen (t) + 1; | |
705 | tp = environ = (char **)xmalloc ((c + 1) * sizeof (char *)); | |
706 | t = pibp->pib_pchenv; | |
707 | while (*t) | |
708 | { | |
709 | *tp++ = t; | |
710 | t += strlen (t) + 1; | |
711 | } | |
712 | *tp = 0; | |
713 | } | |
714 | #endif /* __EMX__ */ | |
715 | ||
716 | /* Initialize the entire state of the world. */ | |
717 | static void | |
718 | readline_initialize_everything () | |
719 | { | |
720 | #if defined (__EMX__) | |
721 | if (environ == 0) | |
722 | _emx_build_environ (); | |
723 | #endif | |
724 | ||
725 | /* Find out if we are running in Emacs. */ | |
726 | running_in_emacs = get_env_value ("EMACS") != (char *)0; | |
727 | ||
728 | /* Set up input and output if they are not already set up. */ | |
729 | if (!rl_instream) | |
730 | rl_instream = stdin; | |
731 | ||
732 | if (!rl_outstream) | |
733 | rl_outstream = stdout; | |
734 | ||
735 | /* Bind _rl_in_stream and _rl_out_stream immediately. These values | |
736 | may change, but they may also be used before readline_internal () | |
737 | is called. */ | |
738 | _rl_in_stream = rl_instream; | |
739 | _rl_out_stream = rl_outstream; | |
740 | ||
741 | /* Allocate data structures. */ | |
742 | if (rl_line_buffer == 0) | |
743 | rl_line_buffer = xmalloc (rl_line_buffer_len = DEFAULT_BUFFER_SIZE); | |
744 | ||
745 | /* Initialize the terminal interface. */ | |
746 | _rl_init_terminal_io ((char *)NULL); | |
747 | ||
748 | #if !defined (__GO32__) | |
749 | /* Bind tty characters to readline functions. */ | |
750 | readline_default_bindings (); | |
751 | #endif /* !__GO32__ */ | |
752 | ||
753 | /* Initialize the function names. */ | |
754 | rl_initialize_funmap (); | |
755 | ||
756 | /* Decide whether we should automatically go into eight-bit mode. */ | |
757 | _rl_init_eightbit (); | |
758 | ||
759 | /* Read in the init file. */ | |
760 | rl_read_init_file ((char *)NULL); | |
761 | ||
762 | /* XXX */ | |
763 | if (_rl_horizontal_scroll_mode && _rl_term_autowrap) | |
764 | { | |
765 | screenwidth--; | |
766 | screenchars -= screenheight; | |
767 | } | |
768 | ||
769 | /* Override the effect of any `set keymap' assignments in the | |
770 | inputrc file. */ | |
771 | rl_set_keymap_from_edit_mode (); | |
772 | ||
773 | /* Try to bind a common arrow key prefix, if not already bound. */ | |
774 | bind_arrow_keys (); | |
775 | ||
776 | /* Enable the meta key, if this terminal has one. */ | |
777 | if (_rl_enable_meta) | |
778 | _rl_enable_meta_key (); | |
779 | ||
780 | /* If the completion parser's default word break characters haven't | |
781 | been set yet, then do so now. */ | |
782 | if (rl_completer_word_break_characters == (char *)NULL) | |
783 | rl_completer_word_break_characters = rl_basic_word_break_characters; | |
784 | } | |
785 | ||
786 | /* If this system allows us to look at the values of the regular | |
787 | input editing characters, then bind them to their readline | |
788 | equivalents, iff the characters are not bound to keymaps. */ | |
789 | static void | |
790 | readline_default_bindings () | |
791 | { | |
792 | rltty_set_default_bindings (_rl_keymap); | |
793 | } | |
794 | ||
795 | static void | |
796 | bind_arrow_keys_internal () | |
797 | { | |
798 | Function *f; | |
799 | ||
800 | f = rl_function_of_keyseq ("\033[A", _rl_keymap, (int *)NULL); | |
801 | if (!f || f == rl_do_lowercase_version) | |
802 | { | |
803 | _rl_bind_if_unbound ("\033[A", rl_get_previous_history); | |
804 | _rl_bind_if_unbound ("\033[B", rl_get_next_history); | |
805 | _rl_bind_if_unbound ("\033[C", rl_forward); | |
806 | _rl_bind_if_unbound ("\033[D", rl_backward); | |
807 | } | |
808 | ||
809 | f = rl_function_of_keyseq ("\033OA", _rl_keymap, (int *)NULL); | |
810 | if (!f || f == rl_do_lowercase_version) | |
811 | { | |
812 | _rl_bind_if_unbound ("\033OA", rl_get_previous_history); | |
813 | _rl_bind_if_unbound ("\033OB", rl_get_next_history); | |
814 | _rl_bind_if_unbound ("\033OC", rl_forward); | |
815 | _rl_bind_if_unbound ("\033OD", rl_backward); | |
816 | } | |
817 | } | |
818 | ||
819 | /* Try and bind the common arrow key prefix after giving termcap and | |
820 | the inputrc file a chance to bind them and create `real' keymaps | |
821 | for the arrow key prefix. */ | |
822 | static void | |
823 | bind_arrow_keys () | |
824 | { | |
825 | Keymap xkeymap; | |
826 | ||
827 | xkeymap = _rl_keymap; | |
828 | ||
829 | _rl_keymap = emacs_standard_keymap; | |
830 | bind_arrow_keys_internal (); | |
831 | ||
832 | #if defined (VI_MODE) | |
833 | _rl_keymap = vi_movement_keymap; | |
834 | bind_arrow_keys_internal (); | |
835 | #endif | |
836 | ||
837 | _rl_keymap = xkeymap; | |
838 | } | |
839 | ||
840 | \f | |
841 | /* **************************************************************** */ | |
842 | /* */ | |
843 | /* Numeric Arguments */ | |
844 | /* */ | |
845 | /* **************************************************************** */ | |
846 | ||
847 | /* Handle C-u style numeric args, as well as M--, and M-digits. */ | |
848 | static int | |
849 | rl_digit_loop () | |
850 | { | |
851 | int key, c, sawminus, sawdigits; | |
852 | ||
c862e87b | 853 | rl_save_prompt (); |
d60d9f65 SS |
854 | |
855 | sawminus = sawdigits = 0; | |
856 | while (1) | |
857 | { | |
c862e87b JM |
858 | if (rl_numeric_arg > 1000000) |
859 | { | |
860 | sawdigits = rl_explicit_arg = rl_numeric_arg = 0; | |
861 | ding (); | |
862 | rl_restore_prompt (); | |
863 | rl_clear_message (); | |
864 | return 1; | |
865 | } | |
d60d9f65 SS |
866 | rl_message ("(arg: %d) ", rl_arg_sign * rl_numeric_arg); |
867 | key = c = rl_read_key (); | |
868 | ||
869 | /* If we see a key bound to `universal-argument' after seeing digits, | |
870 | it ends the argument but is otherwise ignored. */ | |
871 | if (_rl_keymap[c].type == ISFUNC && | |
872 | _rl_keymap[c].function == rl_universal_argument) | |
873 | { | |
874 | if (sawdigits == 0) | |
875 | { | |
876 | rl_numeric_arg *= 4; | |
877 | continue; | |
878 | } | |
879 | else | |
880 | { | |
881 | key = rl_read_key (); | |
c862e87b | 882 | rl_restore_prompt (); |
d60d9f65 SS |
883 | rl_clear_message (); |
884 | return (_rl_dispatch (key, _rl_keymap)); | |
885 | } | |
886 | } | |
887 | ||
888 | c = UNMETA (c); | |
889 | ||
890 | if (_rl_digit_p (c)) | |
891 | { | |
892 | rl_numeric_arg = rl_explicit_arg ? (rl_numeric_arg * 10) + c - '0' : c - '0'; | |
893 | sawdigits = rl_explicit_arg = 1; | |
894 | } | |
895 | else if (c == '-' && rl_explicit_arg == 0) | |
896 | { | |
897 | rl_numeric_arg = sawminus = 1; | |
898 | rl_arg_sign = -1; | |
899 | } | |
900 | else | |
901 | { | |
902 | /* Make M-- command equivalent to M--1 command. */ | |
903 | if (sawminus && rl_numeric_arg == 1 && rl_explicit_arg == 0) | |
904 | rl_explicit_arg = 1; | |
c862e87b | 905 | rl_restore_prompt (); |
d60d9f65 SS |
906 | rl_clear_message (); |
907 | return (_rl_dispatch (key, _rl_keymap)); | |
908 | } | |
909 | } | |
910 | ||
911 | return 0; | |
912 | } | |
913 | ||
914 | /* Add the current digit to the argument in progress. */ | |
915 | int | |
916 | rl_digit_argument (ignore, key) | |
917 | int ignore, key; | |
918 | { | |
919 | rl_pending_input = key; | |
920 | return (rl_digit_loop ()); | |
921 | } | |
922 | ||
923 | /* What to do when you abort reading an argument. */ | |
924 | int | |
925 | rl_discard_argument () | |
926 | { | |
927 | ding (); | |
928 | rl_clear_message (); | |
929 | _rl_init_argument (); | |
930 | return 0; | |
931 | } | |
932 | ||
933 | /* Create a default argument. */ | |
934 | int | |
935 | _rl_init_argument () | |
936 | { | |
937 | rl_numeric_arg = rl_arg_sign = 1; | |
938 | rl_explicit_arg = 0; | |
939 | return 0; | |
940 | } | |
941 | ||
942 | /* C-u, universal argument. Multiply the current argument by 4. | |
943 | Read a key. If the key has nothing to do with arguments, then | |
944 | dispatch on it. If the key is the abort character then abort. */ | |
945 | int | |
946 | rl_universal_argument (count, key) | |
947 | int count, key; | |
948 | { | |
949 | rl_numeric_arg *= 4; | |
950 | return (rl_digit_loop ()); | |
951 | } | |
952 | ||
953 | /* **************************************************************** */ | |
954 | /* */ | |
955 | /* Insert and Delete */ | |
956 | /* */ | |
957 | /* **************************************************************** */ | |
958 | ||
959 | /* Insert a string of text into the line at point. This is the only | |
960 | way that you should do insertion. rl_insert () calls this | |
961 | function. */ | |
962 | int | |
963 | rl_insert_text (string) | |
964 | char *string; | |
965 | { | |
966 | register int i, l = strlen (string); | |
967 | ||
968 | if (rl_end + l >= rl_line_buffer_len) | |
969 | rl_extend_line_buffer (rl_end + l); | |
970 | ||
971 | for (i = rl_end; i >= rl_point; i--) | |
972 | the_line[i + l] = the_line[i]; | |
973 | strncpy (the_line + rl_point, string, l); | |
974 | ||
975 | /* Remember how to undo this if we aren't undoing something. */ | |
976 | if (!_rl_doing_an_undo) | |
977 | { | |
978 | /* If possible and desirable, concatenate the undos. */ | |
979 | if ((l == 1) && | |
980 | rl_undo_list && | |
981 | (rl_undo_list->what == UNDO_INSERT) && | |
982 | (rl_undo_list->end == rl_point) && | |
983 | (rl_undo_list->end - rl_undo_list->start < 20)) | |
984 | rl_undo_list->end++; | |
985 | else | |
986 | rl_add_undo (UNDO_INSERT, rl_point, rl_point + l, (char *)NULL); | |
987 | } | |
988 | rl_point += l; | |
989 | rl_end += l; | |
990 | the_line[rl_end] = '\0'; | |
991 | return l; | |
992 | } | |
993 | ||
994 | /* Delete the string between FROM and TO. FROM is | |
995 | inclusive, TO is not. */ | |
996 | int | |
997 | rl_delete_text (from, to) | |
998 | int from, to; | |
999 | { | |
1000 | register char *text; | |
1001 | register int diff, i; | |
1002 | ||
1003 | /* Fix it if the caller is confused. */ | |
1004 | if (from > to) | |
1005 | SWAP (from, to); | |
1006 | ||
1007 | /* fix boundaries */ | |
1008 | if (to > rl_end) | |
1009 | { | |
1010 | to = rl_end; | |
1011 | if (from > to) | |
1012 | from = to; | |
1013 | } | |
1014 | ||
1015 | text = rl_copy_text (from, to); | |
1016 | ||
1017 | /* Some versions of strncpy() can't handle overlapping arguments. */ | |
1018 | diff = to - from; | |
1019 | for (i = from; i < rl_end - diff; i++) | |
1020 | the_line[i] = the_line[i + diff]; | |
1021 | ||
1022 | /* Remember how to undo this delete. */ | |
1023 | if (_rl_doing_an_undo == 0) | |
1024 | rl_add_undo (UNDO_DELETE, from, to, text); | |
1025 | else | |
1026 | free (text); | |
1027 | ||
1028 | rl_end -= diff; | |
1029 | the_line[rl_end] = '\0'; | |
1030 | return (diff); | |
1031 | } | |
1032 | ||
1033 | /* Fix up point so that it is within the line boundaries after killing | |
1034 | text. If FIX_MARK_TOO is non-zero, the mark is forced within line | |
1035 | boundaries also. */ | |
1036 | ||
1037 | #define _RL_FIX_POINT(x) \ | |
1038 | do { \ | |
1039 | if (x > rl_end) \ | |
1040 | x = rl_end; \ | |
1041 | else if (x < 0) \ | |
1042 | x = 0; \ | |
1043 | } while (0) | |
1044 | ||
1045 | void | |
1046 | _rl_fix_point (fix_mark_too) | |
1047 | int fix_mark_too; | |
1048 | { | |
1049 | _RL_FIX_POINT (rl_point); | |
1050 | if (fix_mark_too) | |
1051 | _RL_FIX_POINT (rl_mark); | |
1052 | } | |
1053 | #undef _RL_FIX_POINT | |
1054 | ||
1055 | void | |
1056 | _rl_replace_text (text, start, end) | |
1057 | char *text; | |
1058 | int start, end; | |
1059 | { | |
1060 | rl_begin_undo_group (); | |
1061 | rl_delete_text (start, end + 1); | |
1062 | rl_point = start; | |
1063 | rl_insert_text (text); | |
1064 | rl_end_undo_group (); | |
1065 | } | |
1066 | ||
1067 | /* **************************************************************** */ | |
1068 | /* */ | |
1069 | /* Readline character functions */ | |
1070 | /* */ | |
1071 | /* **************************************************************** */ | |
1072 | ||
1073 | /* This is not a gap editor, just a stupid line input routine. No hair | |
1074 | is involved in writing any of the functions, and none should be. */ | |
1075 | ||
1076 | /* Note that: | |
1077 | ||
1078 | rl_end is the place in the string that we would place '\0'; | |
1079 | i.e., it is always safe to place '\0' there. | |
1080 | ||
1081 | rl_point is the place in the string where the cursor is. Sometimes | |
1082 | this is the same as rl_end. | |
1083 | ||
1084 | Any command that is called interactively receives two arguments. | |
1085 | The first is a count: the numeric arg pased to this command. | |
1086 | The second is the key which invoked this command. | |
1087 | */ | |
1088 | ||
1089 | /* **************************************************************** */ | |
1090 | /* */ | |
1091 | /* Movement Commands */ | |
1092 | /* */ | |
1093 | /* **************************************************************** */ | |
1094 | ||
1095 | /* Note that if you `optimize' the display for these functions, you cannot | |
1096 | use said functions in other functions which do not do optimizing display. | |
1097 | I.e., you will have to update the data base for rl_redisplay, and you | |
1098 | might as well let rl_redisplay do that job. */ | |
1099 | ||
1100 | /* Move forward COUNT characters. */ | |
1101 | int | |
1102 | rl_forward (count, key) | |
1103 | int count, key; | |
1104 | { | |
1105 | if (count < 0) | |
1106 | rl_backward (-count, key); | |
1107 | else if (count > 0) | |
1108 | { | |
1109 | int end = rl_point + count; | |
1110 | #if defined (VI_MODE) | |
1111 | int lend = rl_end - (rl_editing_mode == vi_mode); | |
1112 | #else | |
1113 | int lend = rl_end; | |
1114 | #endif | |
1115 | ||
1116 | if (end > lend) | |
1117 | { | |
1118 | rl_point = lend; | |
1119 | ding (); | |
1120 | } | |
1121 | else | |
1122 | rl_point = end; | |
1123 | } | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | /* Move backward COUNT characters. */ | |
1128 | int | |
1129 | rl_backward (count, key) | |
1130 | int count, key; | |
1131 | { | |
1132 | if (count < 0) | |
1133 | rl_forward (-count, key); | |
1134 | else if (count > 0) | |
1135 | { | |
1136 | if (rl_point < count) | |
1137 | { | |
1138 | rl_point = 0; | |
1139 | ding (); | |
1140 | } | |
1141 | else | |
1142 | rl_point -= count; | |
1143 | } | |
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | /* Move to the beginning of the line. */ | |
1148 | int | |
1149 | rl_beg_of_line (count, key) | |
1150 | int count, key; | |
1151 | { | |
1152 | rl_point = 0; | |
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | /* Move to the end of the line. */ | |
1157 | int | |
1158 | rl_end_of_line (count, key) | |
1159 | int count, key; | |
1160 | { | |
1161 | rl_point = rl_end; | |
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | /* Move forward a word. We do what Emacs does. */ | |
1166 | int | |
1167 | rl_forward_word (count, key) | |
1168 | int count, key; | |
1169 | { | |
1170 | int c; | |
1171 | ||
1172 | if (count < 0) | |
1173 | { | |
1174 | rl_backward_word (-count, key); | |
1175 | return 0; | |
1176 | } | |
1177 | ||
1178 | while (count) | |
1179 | { | |
1180 | if (rl_point == rl_end) | |
1181 | return 0; | |
1182 | ||
1183 | /* If we are not in a word, move forward until we are in one. | |
1184 | Then, move forward until we hit a non-alphabetic character. */ | |
1185 | c = the_line[rl_point]; | |
1186 | if (alphabetic (c) == 0) | |
1187 | { | |
1188 | while (++rl_point < rl_end) | |
1189 | { | |
1190 | c = the_line[rl_point]; | |
1191 | if (alphabetic (c)) | |
1192 | break; | |
1193 | } | |
1194 | } | |
1195 | if (rl_point == rl_end) | |
1196 | return 0; | |
1197 | while (++rl_point < rl_end) | |
1198 | { | |
1199 | c = the_line[rl_point]; | |
1200 | if (alphabetic (c) == 0) | |
1201 | break; | |
1202 | } | |
1203 | --count; | |
1204 | } | |
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | /* Move backward a word. We do what Emacs does. */ | |
1209 | int | |
1210 | rl_backward_word (count, key) | |
1211 | int count, key; | |
1212 | { | |
1213 | int c; | |
1214 | ||
1215 | if (count < 0) | |
1216 | { | |
1217 | rl_forward_word (-count, key); | |
1218 | return 0; | |
1219 | } | |
1220 | ||
1221 | while (count) | |
1222 | { | |
1223 | if (!rl_point) | |
1224 | return 0; | |
1225 | ||
1226 | /* Like rl_forward_word (), except that we look at the characters | |
1227 | just before point. */ | |
1228 | ||
1229 | c = the_line[rl_point - 1]; | |
1230 | if (alphabetic (c) == 0) | |
1231 | { | |
1232 | while (--rl_point) | |
1233 | { | |
1234 | c = the_line[rl_point - 1]; | |
1235 | if (alphabetic (c)) | |
1236 | break; | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | while (rl_point) | |
1241 | { | |
1242 | c = the_line[rl_point - 1]; | |
1243 | if (alphabetic (c) == 0) | |
1244 | break; | |
1245 | else | |
1246 | --rl_point; | |
1247 | } | |
1248 | --count; | |
1249 | } | |
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | /* Clear the current line. Numeric argument to C-l does this. */ | |
1254 | int | |
c862e87b JM |
1255 | rl_refresh_line (ignore1, ignore2) |
1256 | int ignore1, ignore2; | |
d60d9f65 SS |
1257 | { |
1258 | int curr_line, nleft; | |
1259 | ||
1260 | /* Find out whether or not there might be invisible characters in the | |
1261 | editing buffer. */ | |
1262 | if (rl_display_prompt == rl_prompt) | |
1263 | nleft = _rl_last_c_pos - screenwidth - rl_visible_prompt_length; | |
1264 | else | |
1265 | nleft = _rl_last_c_pos - screenwidth; | |
1266 | ||
1267 | if (nleft > 0) | |
1268 | curr_line = 1 + nleft / screenwidth; | |
1269 | else | |
1270 | curr_line = 0; | |
1271 | ||
1272 | _rl_move_vert (curr_line); | |
1273 | _rl_move_cursor_relative (0, the_line); /* XXX is this right */ | |
1274 | ||
1275 | #if defined (__GO32__) | |
1276 | { | |
1277 | int row, col, width, row_start; | |
1278 | ||
1279 | ScreenGetCursor (&row, &col); | |
1280 | width = ScreenCols (); | |
1281 | row_start = ScreenPrimary + (row * width); | |
1282 | memset (row_start + col, 0, (width - col) * 2); | |
1283 | } | |
1284 | #else /* !__GO32__ */ | |
1285 | _rl_clear_to_eol (0); /* arg of 0 means to not use spaces */ | |
1286 | #endif /* !__GO32__ */ | |
1287 | ||
1288 | rl_forced_update_display (); | |
1289 | rl_display_fixed = 1; | |
1290 | ||
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | /* C-l typed to a line without quoting clears the screen, and then reprints | |
1295 | the prompt and the current input line. Given a numeric arg, redraw only | |
1296 | the current line. */ | |
1297 | int | |
1298 | rl_clear_screen (count, key) | |
1299 | int count, key; | |
1300 | { | |
1301 | if (rl_explicit_arg) | |
1302 | { | |
c862e87b | 1303 | rl_refresh_line (count, key); |
d60d9f65 SS |
1304 | return 0; |
1305 | } | |
1306 | ||
1307 | _rl_clear_screen (); /* calls termcap function to clear screen */ | |
1308 | rl_forced_update_display (); | |
1309 | rl_display_fixed = 1; | |
1310 | ||
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | int | |
1315 | rl_arrow_keys (count, c) | |
1316 | int count, c; | |
1317 | { | |
1318 | int ch; | |
1319 | ||
1320 | ch = rl_read_key (); | |
1321 | ||
1322 | switch (_rl_to_upper (ch)) | |
1323 | { | |
1324 | case 'A': | |
1325 | rl_get_previous_history (count, ch); | |
1326 | break; | |
1327 | ||
1328 | case 'B': | |
1329 | rl_get_next_history (count, ch); | |
1330 | break; | |
1331 | ||
1332 | case 'C': | |
1333 | rl_forward (count, ch); | |
1334 | break; | |
1335 | ||
1336 | case 'D': | |
1337 | rl_backward (count, ch); | |
1338 | break; | |
1339 | ||
1340 | default: | |
1341 | ding (); | |
1342 | } | |
1343 | return 0; | |
1344 | } | |
1345 | ||
1346 | \f | |
1347 | /* **************************************************************** */ | |
1348 | /* */ | |
1349 | /* Text commands */ | |
1350 | /* */ | |
1351 | /* **************************************************************** */ | |
1352 | ||
1353 | /* Insert the character C at the current location, moving point forward. */ | |
1354 | int | |
1355 | rl_insert (count, c) | |
1356 | int count, c; | |
1357 | { | |
1358 | register int i; | |
1359 | char *string; | |
1360 | ||
1361 | if (count <= 0) | |
1362 | return 0; | |
1363 | ||
1364 | /* If we can optimize, then do it. But don't let people crash | |
1365 | readline because of extra large arguments. */ | |
1366 | if (count > 1 && count <= 1024) | |
1367 | { | |
1368 | string = xmalloc (1 + count); | |
1369 | ||
1370 | for (i = 0; i < count; i++) | |
1371 | string[i] = c; | |
1372 | ||
1373 | string[i] = '\0'; | |
1374 | rl_insert_text (string); | |
1375 | free (string); | |
1376 | ||
1377 | return 0; | |
1378 | } | |
1379 | ||
1380 | if (count > 1024) | |
1381 | { | |
1382 | int decreaser; | |
1383 | char str[1024+1]; | |
1384 | ||
1385 | for (i = 0; i < 1024; i++) | |
1386 | str[i] = c; | |
1387 | ||
1388 | while (count) | |
1389 | { | |
1390 | decreaser = (count > 1024 ? 1024 : count); | |
1391 | str[decreaser] = '\0'; | |
1392 | rl_insert_text (str); | |
1393 | count -= decreaser; | |
1394 | } | |
1395 | ||
1396 | return 0; | |
1397 | } | |
1398 | ||
1399 | /* We are inserting a single character. | |
1400 | If there is pending input, then make a string of all of the | |
1401 | pending characters that are bound to rl_insert, and insert | |
1402 | them all. */ | |
1403 | if (_rl_any_typein ()) | |
1404 | _rl_insert_typein (c); | |
1405 | else | |
1406 | { | |
1407 | /* Inserting a single character. */ | |
1408 | char str[2]; | |
1409 | ||
1410 | str[1] = '\0'; | |
1411 | str[0] = c; | |
1412 | rl_insert_text (str); | |
1413 | } | |
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | /* Insert the next typed character verbatim. */ | |
1418 | int | |
1419 | rl_quoted_insert (count, key) | |
1420 | int count, key; | |
1421 | { | |
1422 | int c; | |
1423 | ||
1424 | c = rl_read_key (); | |
1425 | return (rl_insert (count, c)); | |
1426 | } | |
1427 | ||
1428 | /* Insert a tab character. */ | |
1429 | int | |
1430 | rl_tab_insert (count, key) | |
1431 | int count, key; | |
1432 | { | |
1433 | return (rl_insert (count, '\t')); | |
1434 | } | |
1435 | ||
1436 | /* What to do when a NEWLINE is pressed. We accept the whole line. | |
1437 | KEY is the key that invoked this command. I guess it could have | |
1438 | meaning in the future. */ | |
1439 | int | |
1440 | rl_newline (count, key) | |
1441 | int count, key; | |
1442 | { | |
1443 | rl_done = 1; | |
1444 | ||
1445 | #if defined (VI_MODE) | |
1446 | if (rl_editing_mode == vi_mode) | |
1447 | { | |
1448 | _rl_vi_done_inserting (); | |
1449 | _rl_vi_reset_last (); | |
1450 | } | |
1451 | #endif /* VI_MODE */ | |
1452 | ||
c862e87b JM |
1453 | /* If we've been asked to erase empty lines, suppress the final update, |
1454 | since _rl_update_final calls crlf(). */ | |
1455 | if (rl_erase_empty_line && rl_point == 0 && rl_end == 0) | |
1456 | return 0; | |
1457 | ||
d60d9f65 SS |
1458 | if (readline_echoing_p) |
1459 | _rl_update_final (); | |
1460 | return 0; | |
1461 | } | |
1462 | ||
1463 | /* What to do for some uppercase characters, like meta characters, | |
1464 | and some characters appearing in emacs_ctlx_keymap. This function | |
1465 | is just a stub, you bind keys to it and the code in _rl_dispatch () | |
1466 | is special cased. */ | |
1467 | int | |
1468 | rl_do_lowercase_version (ignore1, ignore2) | |
1469 | int ignore1, ignore2; | |
1470 | { | |
1471 | return 0; | |
1472 | } | |
1473 | ||
1474 | /* Rubout the character behind point. */ | |
1475 | int | |
1476 | rl_rubout (count, key) | |
1477 | int count, key; | |
1478 | { | |
1479 | if (count < 0) | |
1480 | { | |
1481 | rl_delete (-count, key); | |
1482 | return 0; | |
1483 | } | |
1484 | ||
1485 | if (!rl_point) | |
1486 | { | |
1487 | ding (); | |
1488 | return -1; | |
1489 | } | |
1490 | ||
1491 | if (count > 1 || rl_explicit_arg) | |
1492 | { | |
1493 | int orig_point = rl_point; | |
1494 | rl_backward (count, key); | |
1495 | rl_kill_text (orig_point, rl_point); | |
1496 | } | |
1497 | else | |
1498 | { | |
1499 | int c = the_line[--rl_point]; | |
1500 | rl_delete_text (rl_point, rl_point + 1); | |
1501 | ||
1502 | if (rl_point == rl_end && isprint (c) && _rl_last_c_pos) | |
1503 | { | |
1504 | int l; | |
1505 | l = rl_character_len (c, rl_point); | |
1506 | _rl_erase_at_end_of_line (l); | |
1507 | } | |
1508 | } | |
1509 | return 0; | |
1510 | } | |
1511 | ||
1512 | /* Delete the character under the cursor. Given a numeric argument, | |
1513 | kill that many characters instead. */ | |
1514 | int | |
1515 | rl_delete (count, key) | |
1516 | int count, key; | |
1517 | { | |
1518 | if (count < 0) | |
1519 | return (rl_rubout (-count, key)); | |
1520 | ||
1521 | if (rl_point == rl_end) | |
1522 | { | |
1523 | ding (); | |
1524 | return -1; | |
1525 | } | |
1526 | ||
1527 | if (count > 1 || rl_explicit_arg) | |
1528 | { | |
1529 | int orig_point = rl_point; | |
1530 | rl_forward (count, key); | |
1531 | rl_kill_text (orig_point, rl_point); | |
1532 | rl_point = orig_point; | |
1533 | return 0; | |
1534 | } | |
1535 | else | |
1536 | return (rl_delete_text (rl_point, rl_point + 1)); | |
d60d9f65 SS |
1537 | } |
1538 | ||
c862e87b JM |
1539 | /* Delete the character under the cursor, unless the insertion |
1540 | point is at the end of the line, in which case the character | |
1541 | behind the cursor is deleted. COUNT is obeyed and may be used | |
1542 | to delete forward or backward that many characters. */ | |
1543 | int | |
1544 | rl_rubout_or_delete (count, key) | |
1545 | int count, key; | |
1546 | { | |
1547 | if (rl_end != 0 && rl_point == rl_end) | |
1548 | return (rl_rubout (count, key)); | |
1549 | else | |
1550 | return (rl_delete (count, key)); | |
1551 | } | |
1552 | ||
d60d9f65 SS |
1553 | /* Delete all spaces and tabs around point. */ |
1554 | int | |
1555 | rl_delete_horizontal_space (count, ignore) | |
1556 | int count, ignore; | |
1557 | { | |
1558 | int start = rl_point; | |
1559 | ||
1560 | while (rl_point && whitespace (the_line[rl_point - 1])) | |
1561 | rl_point--; | |
1562 | ||
1563 | start = rl_point; | |
1564 | ||
1565 | while (rl_point < rl_end && whitespace (the_line[rl_point])) | |
1566 | rl_point++; | |
1567 | ||
1568 | if (start != rl_point) | |
1569 | { | |
1570 | rl_delete_text (start, rl_point); | |
1571 | rl_point = start; | |
1572 | } | |
1573 | return 0; | |
1574 | } | |
1575 | ||
c862e87b JM |
1576 | /* Like the tcsh editing function delete-char-or-list. The eof character |
1577 | is caught before this is invoked, so this really does the same thing as | |
1578 | delete-char-or-list-or-eof, as long as it's bound to the eof character. */ | |
1579 | int | |
1580 | rl_delete_or_show_completions (count, key) | |
1581 | int count, key; | |
1582 | { | |
1583 | if (rl_end != 0 && rl_point == rl_end) | |
1584 | return (rl_possible_completions (count, key)); | |
1585 | else | |
1586 | return (rl_delete (count, key)); | |
1587 | } | |
1588 | ||
d60d9f65 SS |
1589 | #ifndef RL_COMMENT_BEGIN_DEFAULT |
1590 | #define RL_COMMENT_BEGIN_DEFAULT "#" | |
1591 | #endif | |
1592 | ||
1593 | /* Turn the current line into a comment in shell history. | |
1594 | A K*rn shell style function. */ | |
1595 | int | |
1596 | rl_insert_comment (count, key) | |
1597 | int count, key; | |
1598 | { | |
1599 | rl_beg_of_line (1, key); | |
1600 | rl_insert_text (_rl_comment_begin ? _rl_comment_begin | |
1601 | : RL_COMMENT_BEGIN_DEFAULT); | |
1602 | (*rl_redisplay_function) (); | |
1603 | rl_newline (1, '\n'); | |
1604 | return (0); | |
1605 | } | |
1606 | ||
1607 | /* **************************************************************** */ | |
1608 | /* */ | |
1609 | /* Changing Case */ | |
1610 | /* */ | |
1611 | /* **************************************************************** */ | |
1612 | ||
1613 | /* The three kinds of things that we know how to do. */ | |
1614 | #define UpCase 1 | |
1615 | #define DownCase 2 | |
1616 | #define CapCase 3 | |
1617 | ||
1618 | static int rl_change_case (); | |
1619 | ||
1620 | /* Uppercase the word at point. */ | |
1621 | int | |
1622 | rl_upcase_word (count, key) | |
1623 | int count, key; | |
1624 | { | |
1625 | return (rl_change_case (count, UpCase)); | |
1626 | } | |
1627 | ||
1628 | /* Lowercase the word at point. */ | |
1629 | int | |
1630 | rl_downcase_word (count, key) | |
1631 | int count, key; | |
1632 | { | |
1633 | return (rl_change_case (count, DownCase)); | |
1634 | } | |
1635 | ||
1636 | /* Upcase the first letter, downcase the rest. */ | |
1637 | int | |
1638 | rl_capitalize_word (count, key) | |
1639 | int count, key; | |
1640 | { | |
1641 | return (rl_change_case (count, CapCase)); | |
1642 | } | |
1643 | ||
1644 | /* The meaty function. | |
1645 | Change the case of COUNT words, performing OP on them. | |
1646 | OP is one of UpCase, DownCase, or CapCase. | |
1647 | If a negative argument is given, leave point where it started, | |
1648 | otherwise, leave it where it moves to. */ | |
1649 | static int | |
1650 | rl_change_case (count, op) | |
1651 | int count, op; | |
1652 | { | |
1653 | register int start, end; | |
1654 | int inword, c; | |
1655 | ||
1656 | start = rl_point; | |
1657 | rl_forward_word (count, 0); | |
1658 | end = rl_point; | |
1659 | ||
1660 | if (count < 0) | |
1661 | SWAP (start, end); | |
1662 | ||
1663 | /* We are going to modify some text, so let's prepare to undo it. */ | |
1664 | rl_modifying (start, end); | |
1665 | ||
1666 | for (inword = 0; start < end; start++) | |
1667 | { | |
1668 | c = the_line[start]; | |
1669 | switch (op) | |
1670 | { | |
1671 | case UpCase: | |
1672 | the_line[start] = _rl_to_upper (c); | |
1673 | break; | |
1674 | ||
1675 | case DownCase: | |
1676 | the_line[start] = _rl_to_lower (c); | |
1677 | break; | |
1678 | ||
1679 | case CapCase: | |
1680 | the_line[start] = (inword == 0) ? _rl_to_upper (c) : _rl_to_lower (c); | |
1681 | inword = alphabetic (the_line[start]); | |
1682 | break; | |
1683 | ||
1684 | default: | |
1685 | ding (); | |
1686 | return -1; | |
1687 | } | |
1688 | } | |
1689 | rl_point = end; | |
1690 | return 0; | |
1691 | } | |
1692 | ||
1693 | /* **************************************************************** */ | |
1694 | /* */ | |
1695 | /* Transposition */ | |
1696 | /* */ | |
1697 | /* **************************************************************** */ | |
1698 | ||
1699 | /* Transpose the words at point. */ | |
1700 | int | |
1701 | rl_transpose_words (count, key) | |
1702 | int count, key; | |
1703 | { | |
1704 | char *word1, *word2; | |
1705 | int w1_beg, w1_end, w2_beg, w2_end; | |
1706 | int orig_point = rl_point; | |
1707 | ||
1708 | if (!count) | |
1709 | return 0; | |
1710 | ||
1711 | /* Find the two words. */ | |
1712 | rl_forward_word (count, key); | |
1713 | w2_end = rl_point; | |
1714 | rl_backward_word (1, key); | |
1715 | w2_beg = rl_point; | |
1716 | rl_backward_word (count, key); | |
1717 | w1_beg = rl_point; | |
1718 | rl_forward_word (1, key); | |
1719 | w1_end = rl_point; | |
1720 | ||
1721 | /* Do some check to make sure that there really are two words. */ | |
1722 | if ((w1_beg == w2_beg) || (w2_beg < w1_end)) | |
1723 | { | |
1724 | ding (); | |
1725 | rl_point = orig_point; | |
1726 | return -1; | |
1727 | } | |
1728 | ||
1729 | /* Get the text of the words. */ | |
1730 | word1 = rl_copy_text (w1_beg, w1_end); | |
1731 | word2 = rl_copy_text (w2_beg, w2_end); | |
1732 | ||
1733 | /* We are about to do many insertions and deletions. Remember them | |
1734 | as one operation. */ | |
1735 | rl_begin_undo_group (); | |
1736 | ||
1737 | /* Do the stuff at word2 first, so that we don't have to worry | |
1738 | about word1 moving. */ | |
1739 | rl_point = w2_beg; | |
1740 | rl_delete_text (w2_beg, w2_end); | |
1741 | rl_insert_text (word1); | |
1742 | ||
1743 | rl_point = w1_beg; | |
1744 | rl_delete_text (w1_beg, w1_end); | |
1745 | rl_insert_text (word2); | |
1746 | ||
1747 | /* This is exactly correct since the text before this point has not | |
1748 | changed in length. */ | |
1749 | rl_point = w2_end; | |
1750 | ||
1751 | /* I think that does it. */ | |
1752 | rl_end_undo_group (); | |
1753 | free (word1); | |
1754 | free (word2); | |
1755 | ||
1756 | return 0; | |
1757 | } | |
1758 | ||
1759 | /* Transpose the characters at point. If point is at the end of the line, | |
1760 | then transpose the characters before point. */ | |
1761 | int | |
1762 | rl_transpose_chars (count, key) | |
1763 | int count, key; | |
1764 | { | |
1765 | char dummy[2]; | |
1766 | ||
1767 | if (!count) | |
1768 | return 0; | |
1769 | ||
1770 | if (!rl_point || rl_end < 2) | |
1771 | { | |
1772 | ding (); | |
1773 | return -1; | |
1774 | } | |
1775 | ||
1776 | rl_begin_undo_group (); | |
1777 | ||
1778 | if (rl_point == rl_end) | |
1779 | { | |
1780 | --rl_point; | |
1781 | count = 1; | |
1782 | } | |
1783 | rl_point--; | |
1784 | ||
1785 | dummy[0] = the_line[rl_point]; | |
1786 | dummy[1] = '\0'; | |
1787 | ||
1788 | rl_delete_text (rl_point, rl_point + 1); | |
1789 | ||
1790 | rl_point += count; | |
1791 | _rl_fix_point (0); | |
1792 | rl_insert_text (dummy); | |
1793 | ||
1794 | rl_end_undo_group (); | |
1795 | return 0; | |
1796 | } | |
1797 | ||
1798 | /* **************************************************************** */ | |
1799 | /* */ | |
1800 | /* Character Searching */ | |
1801 | /* */ | |
1802 | /* **************************************************************** */ | |
1803 | ||
1804 | int | |
1805 | _rl_char_search_internal (count, dir, schar) | |
1806 | int count, dir, schar; | |
1807 | { | |
1808 | int pos, inc; | |
1809 | ||
1810 | pos = rl_point; | |
1811 | inc = (dir < 0) ? -1 : 1; | |
1812 | while (count) | |
1813 | { | |
1814 | if ((dir < 0 && pos <= 0) || (dir > 0 && pos >= rl_end)) | |
1815 | { | |
1816 | ding (); | |
1817 | return -1; | |
1818 | } | |
1819 | ||
1820 | pos += inc; | |
1821 | do | |
1822 | { | |
1823 | if (rl_line_buffer[pos] == schar) | |
1824 | { | |
1825 | count--; | |
1826 | if (dir < 0) | |
1827 | rl_point = (dir == BTO) ? pos + 1 : pos; | |
1828 | else | |
1829 | rl_point = (dir == FTO) ? pos - 1 : pos; | |
1830 | break; | |
1831 | } | |
1832 | } | |
1833 | while ((dir < 0) ? pos-- : ++pos < rl_end); | |
1834 | } | |
1835 | return (0); | |
1836 | } | |
1837 | ||
1838 | /* Search COUNT times for a character read from the current input stream. | |
1839 | FDIR is the direction to search if COUNT is non-negative; otherwise | |
1840 | the search goes in BDIR. */ | |
1841 | static int | |
1842 | _rl_char_search (count, fdir, bdir) | |
1843 | int count, fdir, bdir; | |
1844 | { | |
1845 | int c; | |
1846 | ||
1847 | c = rl_read_key (); | |
1848 | if (count < 0) | |
1849 | return (_rl_char_search_internal (-count, bdir, c)); | |
1850 | else | |
1851 | return (_rl_char_search_internal (count, fdir, c)); | |
1852 | } | |
1853 | ||
1854 | int | |
1855 | rl_char_search (count, key) | |
1856 | int count, key; | |
1857 | { | |
1858 | return (_rl_char_search (count, FFIND, BFIND)); | |
1859 | } | |
1860 | ||
1861 | int | |
1862 | rl_backward_char_search (count, key) | |
1863 | int count, key; | |
1864 | { | |
1865 | return (_rl_char_search (count, BFIND, FFIND)); | |
1866 | } | |
1867 | ||
1868 | /* **************************************************************** */ | |
1869 | /* */ | |
1870 | /* History Utilities */ | |
1871 | /* */ | |
1872 | /* **************************************************************** */ | |
1873 | ||
1874 | /* We already have a history library, and that is what we use to control | |
1875 | the history features of readline. This is our local interface to | |
1876 | the history mechanism. */ | |
1877 | ||
1878 | /* While we are editing the history, this is the saved | |
1879 | version of the original line. */ | |
1880 | HIST_ENTRY *saved_line_for_history = (HIST_ENTRY *)NULL; | |
1881 | ||
1882 | /* Set the history pointer back to the last entry in the history. */ | |
1883 | static void | |
1884 | start_using_history () | |
1885 | { | |
1886 | using_history (); | |
1887 | if (saved_line_for_history) | |
1888 | _rl_free_history_entry (saved_line_for_history); | |
1889 | ||
1890 | saved_line_for_history = (HIST_ENTRY *)NULL; | |
1891 | } | |
1892 | ||
1893 | /* Free the contents (and containing structure) of a HIST_ENTRY. */ | |
1894 | void | |
1895 | _rl_free_history_entry (entry) | |
1896 | HIST_ENTRY *entry; | |
1897 | { | |
1898 | if (entry == 0) | |
1899 | return; | |
1900 | if (entry->line) | |
1901 | free (entry->line); | |
1902 | free (entry); | |
1903 | } | |
1904 | ||
1905 | /* Perhaps put back the current line if it has changed. */ | |
1906 | int | |
1907 | maybe_replace_line () | |
1908 | { | |
1909 | HIST_ENTRY *temp; | |
1910 | ||
1911 | temp = current_history (); | |
1912 | /* If the current line has changed, save the changes. */ | |
1913 | if (temp && ((UNDO_LIST *)(temp->data) != rl_undo_list)) | |
1914 | { | |
c862e87b | 1915 | temp = replace_history_entry (where_history (), the_line, (histdata_t)rl_undo_list); |
d60d9f65 SS |
1916 | free (temp->line); |
1917 | free (temp); | |
1918 | } | |
1919 | return 0; | |
1920 | } | |
1921 | ||
1922 | /* Put back the saved_line_for_history if there is one. */ | |
1923 | int | |
1924 | maybe_unsave_line () | |
1925 | { | |
1926 | int line_len; | |
1927 | ||
1928 | if (saved_line_for_history) | |
1929 | { | |
1930 | line_len = strlen (saved_line_for_history->line); | |
1931 | ||
1932 | if (line_len >= rl_line_buffer_len) | |
1933 | rl_extend_line_buffer (line_len); | |
1934 | ||
1935 | strcpy (the_line, saved_line_for_history->line); | |
1936 | rl_undo_list = (UNDO_LIST *)saved_line_for_history->data; | |
1937 | _rl_free_history_entry (saved_line_for_history); | |
1938 | saved_line_for_history = (HIST_ENTRY *)NULL; | |
1939 | rl_end = rl_point = strlen (the_line); | |
1940 | } | |
1941 | else | |
1942 | ding (); | |
1943 | return 0; | |
1944 | } | |
1945 | ||
1946 | /* Save the current line in saved_line_for_history. */ | |
1947 | int | |
1948 | maybe_save_line () | |
1949 | { | |
1950 | if (saved_line_for_history == 0) | |
1951 | { | |
1952 | saved_line_for_history = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY)); | |
1953 | saved_line_for_history->line = savestring (the_line); | |
1954 | saved_line_for_history->data = (char *)rl_undo_list; | |
1955 | } | |
1956 | return 0; | |
1957 | } | |
1958 | ||
1959 | /* **************************************************************** */ | |
1960 | /* */ | |
1961 | /* History Commands */ | |
1962 | /* */ | |
1963 | /* **************************************************************** */ | |
1964 | ||
1965 | /* Meta-< goes to the start of the history. */ | |
1966 | int | |
1967 | rl_beginning_of_history (count, key) | |
1968 | int count, key; | |
1969 | { | |
1970 | return (rl_get_previous_history (1 + where_history (), key)); | |
1971 | } | |
1972 | ||
1973 | /* Meta-> goes to the end of the history. (The current line). */ | |
1974 | int | |
1975 | rl_end_of_history (count, key) | |
1976 | int count, key; | |
1977 | { | |
1978 | maybe_replace_line (); | |
1979 | using_history (); | |
1980 | maybe_unsave_line (); | |
1981 | return 0; | |
1982 | } | |
1983 | ||
1984 | /* Move down to the next history line. */ | |
1985 | int | |
1986 | rl_get_next_history (count, key) | |
1987 | int count, key; | |
1988 | { | |
1989 | HIST_ENTRY *temp; | |
1990 | int line_len; | |
1991 | ||
1992 | if (count < 0) | |
1993 | return (rl_get_previous_history (-count, key)); | |
1994 | ||
1995 | if (count == 0) | |
1996 | return 0; | |
1997 | ||
1998 | maybe_replace_line (); | |
1999 | ||
2000 | temp = (HIST_ENTRY *)NULL; | |
2001 | while (count) | |
2002 | { | |
2003 | temp = next_history (); | |
2004 | if (!temp) | |
2005 | break; | |
2006 | --count; | |
2007 | } | |
2008 | ||
2009 | if (temp == 0) | |
2010 | maybe_unsave_line (); | |
2011 | else | |
2012 | { | |
2013 | line_len = strlen (temp->line); | |
2014 | ||
2015 | if (line_len >= rl_line_buffer_len) | |
2016 | rl_extend_line_buffer (line_len); | |
2017 | ||
2018 | strcpy (the_line, temp->line); | |
2019 | rl_undo_list = (UNDO_LIST *)temp->data; | |
2020 | rl_end = rl_point = strlen (the_line); | |
2021 | #if defined (VI_MODE) | |
2022 | if (rl_editing_mode == vi_mode) | |
2023 | rl_point = 0; | |
2024 | #endif /* VI_MODE */ | |
2025 | } | |
2026 | return 0; | |
2027 | } | |
2028 | ||
2029 | /* Get the previous item out of our interactive history, making it the current | |
2030 | line. If there is no previous history, just ding. */ | |
2031 | int | |
2032 | rl_get_previous_history (count, key) | |
2033 | int count, key; | |
2034 | { | |
2035 | HIST_ENTRY *old_temp, *temp; | |
2036 | int line_len; | |
2037 | ||
2038 | if (count < 0) | |
2039 | return (rl_get_next_history (-count, key)); | |
2040 | ||
2041 | if (count == 0) | |
2042 | return 0; | |
2043 | ||
2044 | /* If we don't have a line saved, then save this one. */ | |
2045 | maybe_save_line (); | |
2046 | ||
2047 | /* If the current line has changed, save the changes. */ | |
2048 | maybe_replace_line (); | |
2049 | ||
2050 | temp = old_temp = (HIST_ENTRY *)NULL; | |
2051 | while (count) | |
2052 | { | |
2053 | temp = previous_history (); | |
2054 | if (temp == 0) | |
2055 | break; | |
2056 | ||
2057 | old_temp = temp; | |
2058 | --count; | |
2059 | } | |
2060 | ||
2061 | /* If there was a large argument, and we moved back to the start of the | |
2062 | history, that is not an error. So use the last value found. */ | |
2063 | if (!temp && old_temp) | |
2064 | temp = old_temp; | |
2065 | ||
2066 | if (temp == 0) | |
2067 | ding (); | |
2068 | else | |
2069 | { | |
2070 | line_len = strlen (temp->line); | |
2071 | ||
2072 | if (line_len >= rl_line_buffer_len) | |
2073 | rl_extend_line_buffer (line_len); | |
2074 | ||
2075 | strcpy (the_line, temp->line); | |
2076 | rl_undo_list = (UNDO_LIST *)temp->data; | |
2077 | rl_end = rl_point = line_len; | |
2078 | ||
2079 | #if defined (VI_MODE) | |
2080 | if (rl_editing_mode == vi_mode) | |
2081 | rl_point = 0; | |
2082 | #endif /* VI_MODE */ | |
2083 | } | |
2084 | return 0; | |
2085 | } | |
2086 | ||
2087 | /* **************************************************************** */ | |
2088 | /* */ | |
2089 | /* The Mark and the Region. */ | |
2090 | /* */ | |
2091 | /* **************************************************************** */ | |
2092 | ||
2093 | /* Set the mark at POSITION. */ | |
2094 | int | |
2095 | _rl_set_mark_at_pos (position) | |
2096 | int position; | |
2097 | { | |
2098 | if (position > rl_end) | |
2099 | return -1; | |
2100 | ||
2101 | rl_mark = position; | |
2102 | return 0; | |
2103 | } | |
2104 | ||
2105 | /* A bindable command to set the mark. */ | |
2106 | int | |
2107 | rl_set_mark (count, key) | |
2108 | int count, key; | |
2109 | { | |
2110 | return (_rl_set_mark_at_pos (rl_explicit_arg ? count : rl_point)); | |
2111 | } | |
2112 | ||
2113 | /* Exchange the position of mark and point. */ | |
2114 | int | |
2115 | rl_exchange_point_and_mark (count, key) | |
2116 | int count, key; | |
2117 | { | |
2118 | if (rl_mark > rl_end) | |
2119 | rl_mark = -1; | |
2120 | ||
2121 | if (rl_mark == -1) | |
2122 | { | |
2123 | ding (); | |
2124 | return -1; | |
2125 | } | |
2126 | else | |
2127 | SWAP (rl_point, rl_mark); | |
2128 | ||
2129 | return 0; | |
2130 | } | |
2131 | ||
2132 | /* **************************************************************** */ | |
2133 | /* */ | |
2134 | /* Editing Modes */ | |
2135 | /* */ | |
2136 | /* **************************************************************** */ | |
2137 | /* How to toggle back and forth between editing modes. */ | |
2138 | int | |
2139 | rl_vi_editing_mode (count, key) | |
2140 | int count, key; | |
2141 | { | |
2142 | #if defined (VI_MODE) | |
2143 | rl_editing_mode = vi_mode; | |
2144 | rl_vi_insertion_mode (1, key); | |
2145 | #endif /* VI_MODE */ | |
2146 | return 0; | |
2147 | } | |
2148 | ||
2149 | int | |
2150 | rl_emacs_editing_mode (count, key) | |
2151 | int count, key; | |
2152 | { | |
2153 | rl_editing_mode = emacs_mode; | |
2154 | _rl_keymap = emacs_standard_keymap; | |
2155 | return 0; | |
2156 | } |