Commit | Line | Data |
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d60d9f65 SS |
1 | /* search.c - code for non-incremental searching in emacs and vi modes. */ |
2 | ||
775e241e | 3 | /* Copyright (C) 1992-2015 Free Software Foundation, Inc. |
d60d9f65 | 4 | |
cc88a640 JK |
5 | This file is part of the GNU Readline Library (Readline), a library |
6 | for reading lines of text with interactive input and history editing. | |
d60d9f65 | 7 | |
cc88a640 | 8 | Readline is free software: you can redistribute it and/or modify |
d60d9f65 | 9 | it under the terms of the GNU General Public License as published by |
cc88a640 JK |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
12 | ||
13 | Readline is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with Readline. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
d60d9f65 SS |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
25 | # include <config.h> | |
26 | #endif | |
27 | ||
28 | #include <sys/types.h> | |
29 | #include <stdio.h> | |
30 | ||
31 | #if defined (HAVE_UNISTD_H) | |
32 | # include <unistd.h> | |
33 | #endif | |
34 | ||
35 | #if defined (HAVE_STDLIB_H) | |
36 | # include <stdlib.h> | |
37 | #else | |
38 | # include "ansi_stdlib.h" | |
39 | #endif | |
40 | ||
41 | #include "rldefs.h" | |
9255ee31 EZ |
42 | #include "rlmbutil.h" |
43 | ||
d60d9f65 SS |
44 | #include "readline.h" |
45 | #include "history.h" | |
775e241e | 46 | #include "histlib.h" |
d60d9f65 | 47 | |
1b17e766 EZ |
48 | #include "rlprivate.h" |
49 | #include "xmalloc.h" | |
50 | ||
d60d9f65 SS |
51 | #ifdef abs |
52 | # undef abs | |
53 | #endif | |
54 | #define abs(x) (((x) >= 0) ? (x) : -(x)) | |
55 | ||
5bdf8622 DJ |
56 | _rl_search_cxt *_rl_nscxt = 0; |
57 | ||
9255ee31 | 58 | extern HIST_ENTRY *_rl_saved_line_for_history; |
d60d9f65 SS |
59 | |
60 | /* Functions imported from the rest of the library. */ | |
775e241e | 61 | extern void _rl_free_history_entry PARAMS((HIST_ENTRY *)); |
d60d9f65 SS |
62 | |
63 | static char *noninc_search_string = (char *) NULL; | |
64 | static int noninc_history_pos; | |
1b17e766 | 65 | |
d60d9f65 SS |
66 | static char *prev_line_found = (char *) NULL; |
67 | ||
1b17e766 EZ |
68 | static int rl_history_search_len; |
69 | static int rl_history_search_pos; | |
775e241e TT |
70 | static int rl_history_search_flags; |
71 | ||
1b17e766 EZ |
72 | static char *history_search_string; |
73 | static int history_string_size; | |
74 | ||
9255ee31 EZ |
75 | static void make_history_line_current PARAMS((HIST_ENTRY *)); |
76 | static int noninc_search_from_pos PARAMS((char *, int, int)); | |
5bdf8622 DJ |
77 | static int noninc_dosearch PARAMS((char *, int)); |
78 | static int noninc_search PARAMS((int, int)); | |
9255ee31 | 79 | static int rl_history_search_internal PARAMS((int, int)); |
775e241e | 80 | static void rl_history_search_reinit PARAMS((int)); |
9255ee31 | 81 | |
5bdf8622 | 82 | static _rl_search_cxt *_rl_nsearch_init PARAMS((int, int)); |
5bdf8622 DJ |
83 | static void _rl_nsearch_abort PARAMS((_rl_search_cxt *)); |
84 | static int _rl_nsearch_dispatch PARAMS((_rl_search_cxt *, int)); | |
85 | ||
1b17e766 EZ |
86 | /* Make the data from the history entry ENTRY be the contents of the |
87 | current line. This doesn't do anything with rl_point; the caller | |
88 | must set it. */ | |
89 | static void | |
90 | make_history_line_current (entry) | |
91 | HIST_ENTRY *entry; | |
92 | { | |
5bdf8622 DJ |
93 | _rl_replace_text (entry->line, 0, rl_end); |
94 | _rl_fix_point (1); | |
95 | #if defined (VI_MODE) | |
96 | if (rl_editing_mode == vi_mode) | |
97 | /* POSIX.2 says that the `U' command doesn't affect the copy of any | |
98 | command lines to the edit line. We're going to implement that by | |
99 | making the undo list start after the matching line is copied to the | |
100 | current editing buffer. */ | |
101 | rl_free_undo_list (); | |
102 | #endif | |
1b17e766 | 103 | |
9255ee31 EZ |
104 | if (_rl_saved_line_for_history) |
105 | _rl_free_history_entry (_rl_saved_line_for_history); | |
106 | _rl_saved_line_for_history = (HIST_ENTRY *)NULL; | |
1b17e766 EZ |
107 | } |
108 | ||
d60d9f65 SS |
109 | /* Search the history list for STRING starting at absolute history position |
110 | POS. If STRING begins with `^', the search must match STRING at the | |
111 | beginning of a history line, otherwise a full substring match is performed | |
112 | for STRING. DIR < 0 means to search backwards through the history list, | |
113 | DIR >= 0 means to search forward. */ | |
114 | static int | |
115 | noninc_search_from_pos (string, pos, dir) | |
116 | char *string; | |
117 | int pos, dir; | |
118 | { | |
119 | int ret, old; | |
120 | ||
9255ee31 EZ |
121 | if (pos < 0) |
122 | return -1; | |
123 | ||
d60d9f65 | 124 | old = where_history (); |
9255ee31 EZ |
125 | if (history_set_pos (pos) == 0) |
126 | return -1; | |
d60d9f65 | 127 | |
9255ee31 | 128 | RL_SETSTATE(RL_STATE_SEARCH); |
d60d9f65 SS |
129 | if (*string == '^') |
130 | ret = history_search_prefix (string + 1, dir); | |
131 | else | |
132 | ret = history_search (string, dir); | |
9255ee31 | 133 | RL_UNSETSTATE(RL_STATE_SEARCH); |
d60d9f65 SS |
134 | |
135 | if (ret != -1) | |
136 | ret = where_history (); | |
137 | ||
138 | history_set_pos (old); | |
139 | return (ret); | |
140 | } | |
141 | ||
142 | /* Search for a line in the history containing STRING. If DIR is < 0, the | |
143 | search is backwards through previous entries, else through subsequent | |
5bdf8622 DJ |
144 | entries. Returns 1 if the search was successful, 0 otherwise. */ |
145 | static int | |
d60d9f65 SS |
146 | noninc_dosearch (string, dir) |
147 | char *string; | |
148 | int dir; | |
149 | { | |
1b17e766 | 150 | int oldpos, pos; |
d60d9f65 SS |
151 | HIST_ENTRY *entry; |
152 | ||
153 | if (string == 0 || *string == '\0' || noninc_history_pos < 0) | |
154 | { | |
9255ee31 | 155 | rl_ding (); |
5bdf8622 | 156 | return 0; |
d60d9f65 SS |
157 | } |
158 | ||
159 | pos = noninc_search_from_pos (string, noninc_history_pos + dir, dir); | |
160 | if (pos == -1) | |
161 | { | |
162 | /* Search failed, current history position unchanged. */ | |
9255ee31 | 163 | rl_maybe_unsave_line (); |
d60d9f65 SS |
164 | rl_clear_message (); |
165 | rl_point = 0; | |
9255ee31 | 166 | rl_ding (); |
5bdf8622 | 167 | return 0; |
d60d9f65 SS |
168 | } |
169 | ||
170 | noninc_history_pos = pos; | |
171 | ||
172 | oldpos = where_history (); | |
173 | history_set_pos (noninc_history_pos); | |
775e241e TT |
174 | entry = current_history (); /* will never be NULL after successful search */ |
175 | ||
d60d9f65 SS |
176 | #if defined (VI_MODE) |
177 | if (rl_editing_mode != vi_mode) | |
178 | #endif | |
5bdf8622 | 179 | history_set_pos (oldpos); |
d60d9f65 | 180 | |
1b17e766 | 181 | make_history_line_current (entry); |
d60d9f65 | 182 | |
d60d9f65 | 183 | rl_point = 0; |
9255ee31 EZ |
184 | rl_mark = rl_end; |
185 | ||
d60d9f65 | 186 | rl_clear_message (); |
5bdf8622 | 187 | return 1; |
d60d9f65 SS |
188 | } |
189 | ||
5bdf8622 DJ |
190 | static _rl_search_cxt * |
191 | _rl_nsearch_init (dir, pchar) | |
192 | int dir, pchar; | |
d60d9f65 | 193 | { |
5bdf8622 | 194 | _rl_search_cxt *cxt; |
d60d9f65 | 195 | char *p; |
5bdf8622 DJ |
196 | |
197 | cxt = _rl_scxt_alloc (RL_SEARCH_NSEARCH, 0); | |
198 | if (dir < 0) | |
199 | cxt->sflags |= SF_REVERSE; /* not strictly needed */ | |
200 | ||
201 | cxt->direction = dir; | |
202 | cxt->history_pos = cxt->save_line; | |
d60d9f65 | 203 | |
9255ee31 | 204 | rl_maybe_save_line (); |
5bdf8622 DJ |
205 | |
206 | /* Clear the undo list, since reading the search string should create its | |
207 | own undo list, and the whole list will end up being freed when we | |
208 | finish reading the search string. */ | |
209 | rl_undo_list = 0; | |
d60d9f65 SS |
210 | |
211 | /* Use the line buffer to read the search string. */ | |
212 | rl_line_buffer[0] = 0; | |
213 | rl_end = rl_point = 0; | |
214 | ||
215 | p = _rl_make_prompt_for_search (pchar ? pchar : ':'); | |
20b23ee6 | 216 | rl_message ("%s", p); |
cc88a640 | 217 | xfree (p); |
d60d9f65 | 218 | |
9255ee31 | 219 | RL_SETSTATE(RL_STATE_NSEARCH); |
5bdf8622 DJ |
220 | |
221 | _rl_nscxt = cxt; | |
222 | ||
223 | return cxt; | |
224 | } | |
225 | ||
775e241e | 226 | int |
5bdf8622 DJ |
227 | _rl_nsearch_cleanup (cxt, r) |
228 | _rl_search_cxt *cxt; | |
229 | int r; | |
230 | { | |
231 | _rl_scxt_dispose (cxt, 0); | |
232 | _rl_nscxt = 0; | |
233 | ||
234 | RL_UNSETSTATE(RL_STATE_NSEARCH); | |
235 | ||
236 | return (r != 1); | |
237 | } | |
238 | ||
239 | static void | |
240 | _rl_nsearch_abort (cxt) | |
241 | _rl_search_cxt *cxt; | |
242 | { | |
243 | rl_maybe_unsave_line (); | |
244 | rl_clear_message (); | |
245 | rl_point = cxt->save_point; | |
246 | rl_mark = cxt->save_mark; | |
247 | rl_restore_prompt (); | |
248 | ||
249 | RL_UNSETSTATE (RL_STATE_NSEARCH); | |
250 | } | |
251 | ||
252 | /* Process just-read character C according to search context CXT. Return -1 | |
253 | if the caller should abort the search, 0 if we should break out of the | |
254 | loop, and 1 if we should continue to read characters. */ | |
255 | static int | |
256 | _rl_nsearch_dispatch (cxt, c) | |
257 | _rl_search_cxt *cxt; | |
258 | int c; | |
259 | { | |
260 | switch (c) | |
d60d9f65 | 261 | { |
5bdf8622 DJ |
262 | case CTRL('W'): |
263 | rl_unix_word_rubout (1, c); | |
264 | break; | |
9255ee31 | 265 | |
5bdf8622 DJ |
266 | case CTRL('U'): |
267 | rl_unix_line_discard (1, c); | |
268 | break; | |
9255ee31 | 269 | |
5bdf8622 DJ |
270 | case RETURN: |
271 | case NEWLINE: | |
272 | return 0; | |
9255ee31 | 273 | |
5bdf8622 DJ |
274 | case CTRL('H'): |
275 | case RUBOUT: | |
276 | if (rl_point == 0) | |
d60d9f65 | 277 | { |
5bdf8622 DJ |
278 | _rl_nsearch_abort (cxt); |
279 | return -1; | |
280 | } | |
281 | _rl_rubout_char (1, c); | |
282 | break; | |
283 | ||
284 | case CTRL('C'): | |
285 | case CTRL('G'): | |
286 | rl_ding (); | |
287 | _rl_nsearch_abort (cxt); | |
288 | return -1; | |
d60d9f65 | 289 | |
5bdf8622 | 290 | default: |
9255ee31 | 291 | #if defined (HANDLE_MULTIBYTE) |
5bdf8622 DJ |
292 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
293 | rl_insert_text (cxt->mb); | |
294 | else | |
9255ee31 | 295 | #endif |
5bdf8622 DJ |
296 | _rl_insert_char (1, c); |
297 | break; | |
d60d9f65 SS |
298 | } |
299 | ||
5bdf8622 DJ |
300 | (*rl_redisplay_function) (); |
301 | return 1; | |
302 | } | |
303 | ||
304 | /* Perform one search according to CXT, using NONINC_SEARCH_STRING. Return | |
305 | -1 if the search should be aborted, any other value means to clean up | |
306 | using _rl_nsearch_cleanup (). Returns 1 if the search was successful, | |
307 | 0 otherwise. */ | |
308 | static int | |
309 | _rl_nsearch_dosearch (cxt) | |
310 | _rl_search_cxt *cxt; | |
311 | { | |
312 | rl_mark = cxt->save_mark; | |
9255ee31 | 313 | |
d60d9f65 SS |
314 | /* If rl_point == 0, we want to re-use the previous search string and |
315 | start from the saved history position. If there's no previous search | |
316 | string, punt. */ | |
317 | if (rl_point == 0) | |
318 | { | |
5bdf8622 | 319 | if (noninc_search_string == 0) |
d60d9f65 | 320 | { |
9255ee31 | 321 | rl_ding (); |
5bdf8622 DJ |
322 | rl_restore_prompt (); |
323 | RL_UNSETSTATE (RL_STATE_NSEARCH); | |
324 | return -1; | |
d60d9f65 SS |
325 | } |
326 | } | |
327 | else | |
328 | { | |
329 | /* We want to start the search from the current history position. */ | |
5bdf8622 | 330 | noninc_history_pos = cxt->save_line; |
1b17e766 | 331 | FREE (noninc_search_string); |
d60d9f65 | 332 | noninc_search_string = savestring (rl_line_buffer); |
5bdf8622 DJ |
333 | |
334 | /* If we don't want the subsequent undo list generated by the search | |
335 | matching a history line to include the contents of the search string, | |
336 | we need to clear rl_line_buffer here. For now, we just clear the | |
337 | undo list generated by reading the search string. (If the search | |
338 | fails, the old undo list will be restored by rl_maybe_unsave_line.) */ | |
339 | rl_free_undo_list (); | |
d60d9f65 SS |
340 | } |
341 | ||
c862e87b | 342 | rl_restore_prompt (); |
5bdf8622 DJ |
343 | return (noninc_dosearch (noninc_search_string, cxt->direction)); |
344 | } | |
345 | ||
346 | /* Search non-interactively through the history list. DIR < 0 means to | |
347 | search backwards through the history of previous commands; otherwise | |
348 | the search is for commands subsequent to the current position in the | |
349 | history list. PCHAR is the character to use for prompting when reading | |
350 | the search string; if not specified (0), it defaults to `:'. */ | |
351 | static int | |
352 | noninc_search (dir, pchar) | |
353 | int dir; | |
354 | int pchar; | |
355 | { | |
356 | _rl_search_cxt *cxt; | |
357 | int c, r; | |
358 | ||
359 | cxt = _rl_nsearch_init (dir, pchar); | |
360 | ||
361 | if (RL_ISSTATE (RL_STATE_CALLBACK)) | |
362 | return (0); | |
363 | ||
364 | /* Read the search string. */ | |
365 | r = 0; | |
366 | while (1) | |
367 | { | |
368 | c = _rl_search_getchar (cxt); | |
369 | ||
370 | if (c == 0) | |
371 | break; | |
372 | ||
373 | r = _rl_nsearch_dispatch (cxt, c); | |
374 | if (r < 0) | |
375 | return 1; | |
376 | else if (r == 0) | |
377 | break; | |
378 | } | |
379 | ||
380 | r = _rl_nsearch_dosearch (cxt); | |
381 | return ((r >= 0) ? _rl_nsearch_cleanup (cxt, r) : (r != 1)); | |
d60d9f65 SS |
382 | } |
383 | ||
384 | /* Search forward through the history list for a string. If the vi-mode | |
385 | code calls this, KEY will be `?'. */ | |
386 | int | |
387 | rl_noninc_forward_search (count, key) | |
388 | int count, key; | |
389 | { | |
5bdf8622 | 390 | return noninc_search (1, (key == '?') ? '?' : 0); |
d60d9f65 SS |
391 | } |
392 | ||
393 | /* Reverse search the history list for a string. If the vi-mode code | |
394 | calls this, KEY will be `/'. */ | |
395 | int | |
396 | rl_noninc_reverse_search (count, key) | |
397 | int count, key; | |
398 | { | |
5bdf8622 | 399 | return noninc_search (-1, (key == '/') ? '/' : 0); |
d60d9f65 SS |
400 | } |
401 | ||
402 | /* Search forward through the history list for the last string searched | |
403 | for. If there is no saved search string, abort. */ | |
404 | int | |
405 | rl_noninc_forward_search_again (count, key) | |
406 | int count, key; | |
407 | { | |
5bdf8622 DJ |
408 | int r; |
409 | ||
d60d9f65 SS |
410 | if (!noninc_search_string) |
411 | { | |
9255ee31 | 412 | rl_ding (); |
775e241e | 413 | return (1); |
d60d9f65 | 414 | } |
5bdf8622 DJ |
415 | r = noninc_dosearch (noninc_search_string, 1); |
416 | return (r != 1); | |
d60d9f65 SS |
417 | } |
418 | ||
419 | /* Reverse search in the history list for the last string searched | |
420 | for. If there is no saved search string, abort. */ | |
421 | int | |
422 | rl_noninc_reverse_search_again (count, key) | |
423 | int count, key; | |
424 | { | |
5bdf8622 DJ |
425 | int r; |
426 | ||
d60d9f65 SS |
427 | if (!noninc_search_string) |
428 | { | |
9255ee31 | 429 | rl_ding (); |
775e241e | 430 | return (1); |
d60d9f65 | 431 | } |
5bdf8622 DJ |
432 | r = noninc_dosearch (noninc_search_string, -1); |
433 | return (r != 1); | |
d60d9f65 SS |
434 | } |
435 | ||
5bdf8622 DJ |
436 | #if defined (READLINE_CALLBACKS) |
437 | int | |
438 | _rl_nsearch_callback (cxt) | |
439 | _rl_search_cxt *cxt; | |
440 | { | |
441 | int c, r; | |
442 | ||
443 | c = _rl_search_getchar (cxt); | |
444 | r = _rl_nsearch_dispatch (cxt, c); | |
445 | if (r != 0) | |
446 | return 1; | |
447 | ||
448 | r = _rl_nsearch_dosearch (cxt); | |
449 | return ((r >= 0) ? _rl_nsearch_cleanup (cxt, r) : (r != 1)); | |
450 | } | |
451 | #endif | |
452 | ||
d60d9f65 | 453 | static int |
1b17e766 EZ |
454 | rl_history_search_internal (count, dir) |
455 | int count, dir; | |
d60d9f65 | 456 | { |
1b17e766 EZ |
457 | HIST_ENTRY *temp; |
458 | int ret, oldpos; | |
775e241e | 459 | char *t; |
d60d9f65 | 460 | |
9255ee31 | 461 | rl_maybe_save_line (); |
1b17e766 | 462 | temp = (HIST_ENTRY *)NULL; |
d60d9f65 | 463 | |
775e241e TT |
464 | /* Search COUNT times through the history for a line matching |
465 | history_search_string. If history_search_string[0] == '^', the | |
466 | line must match from the start; otherwise any substring can match. | |
467 | When this loop finishes, TEMP, if non-null, is the history line to | |
468 | copy into the line buffer. */ | |
d60d9f65 SS |
469 | while (count) |
470 | { | |
775e241e | 471 | RL_CHECK_SIGNALS (); |
1b17e766 EZ |
472 | ret = noninc_search_from_pos (history_search_string, rl_history_search_pos + dir, dir); |
473 | if (ret == -1) | |
474 | break; | |
475 | ||
476 | /* Get the history entry we found. */ | |
477 | rl_history_search_pos = ret; | |
478 | oldpos = where_history (); | |
479 | history_set_pos (rl_history_search_pos); | |
775e241e | 480 | temp = current_history (); /* will never be NULL after successful search */ |
1b17e766 EZ |
481 | history_set_pos (oldpos); |
482 | ||
483 | /* Don't find multiple instances of the same line. */ | |
484 | if (prev_line_found && STREQ (prev_line_found, temp->line)) | |
485 | continue; | |
486 | prev_line_found = temp->line; | |
487 | count--; | |
d60d9f65 SS |
488 | } |
489 | ||
1b17e766 | 490 | /* If we didn't find anything at all, return. */ |
d60d9f65 SS |
491 | if (temp == 0) |
492 | { | |
9255ee31 EZ |
493 | rl_maybe_unsave_line (); |
494 | rl_ding (); | |
1b17e766 EZ |
495 | /* If you don't want the saved history line (last match) to show up |
496 | in the line buffer after the search fails, change the #if 0 to | |
497 | #if 1 */ | |
498 | #if 0 | |
499 | if (rl_point > rl_history_search_len) | |
500 | { | |
501 | rl_point = rl_end = rl_history_search_len; | |
502 | rl_line_buffer[rl_end] = '\0'; | |
9255ee31 | 503 | rl_mark = 0; |
1b17e766 EZ |
504 | } |
505 | #else | |
9255ee31 EZ |
506 | rl_point = rl_history_search_len; /* rl_maybe_unsave_line changes it */ |
507 | rl_mark = rl_end; | |
1b17e766 EZ |
508 | #endif |
509 | return 1; | |
d60d9f65 SS |
510 | } |
511 | ||
1b17e766 EZ |
512 | /* Copy the line we found into the current line buffer. */ |
513 | make_history_line_current (temp); | |
514 | ||
775e241e TT |
515 | if (rl_history_search_flags & ANCHORED_SEARCH) |
516 | rl_point = rl_history_search_len; /* easy case */ | |
517 | else | |
518 | { | |
519 | t = strstr (rl_line_buffer, history_search_string); | |
520 | rl_point = t ? (int)(t - rl_line_buffer) + rl_history_search_len : rl_end; | |
521 | } | |
9255ee31 EZ |
522 | rl_mark = rl_end; |
523 | ||
d60d9f65 SS |
524 | return 0; |
525 | } | |
526 | ||
1b17e766 | 527 | static void |
775e241e TT |
528 | rl_history_search_reinit (flags) |
529 | int flags; | |
1b17e766 | 530 | { |
775e241e TT |
531 | int sind; |
532 | ||
1b17e766 EZ |
533 | rl_history_search_pos = where_history (); |
534 | rl_history_search_len = rl_point; | |
775e241e TT |
535 | rl_history_search_flags = flags; |
536 | ||
1b17e766 EZ |
537 | prev_line_found = (char *)NULL; |
538 | if (rl_point) | |
539 | { | |
775e241e | 540 | /* Allocate enough space for anchored and non-anchored searches */ |
1b17e766 EZ |
541 | if (rl_history_search_len >= history_string_size - 2) |
542 | { | |
543 | history_string_size = rl_history_search_len + 2; | |
9255ee31 | 544 | history_search_string = (char *)xrealloc (history_search_string, history_string_size); |
1b17e766 | 545 | } |
775e241e TT |
546 | sind = 0; |
547 | if (flags & ANCHORED_SEARCH) | |
548 | history_search_string[sind++] = '^'; | |
549 | strncpy (history_search_string + sind, rl_line_buffer, rl_point); | |
550 | history_search_string[rl_point + sind] = '\0'; | |
1b17e766 | 551 | } |
9255ee31 | 552 | _rl_free_saved_history_line (); |
1b17e766 EZ |
553 | } |
554 | ||
d60d9f65 SS |
555 | /* Search forward in the history for the string of characters |
556 | from the start of the line to rl_point. This is a non-incremental | |
775e241e | 557 | search. The search is anchored to the beginning of the history line. */ |
d60d9f65 SS |
558 | int |
559 | rl_history_search_forward (count, ignore) | |
560 | int count, ignore; | |
561 | { | |
562 | if (count == 0) | |
563 | return (0); | |
1b17e766 EZ |
564 | |
565 | if (rl_last_func != rl_history_search_forward && | |
566 | rl_last_func != rl_history_search_backward) | |
775e241e | 567 | rl_history_search_reinit (ANCHORED_SEARCH); |
1b17e766 EZ |
568 | |
569 | if (rl_history_search_len == 0) | |
570 | return (rl_get_next_history (count, ignore)); | |
d60d9f65 SS |
571 | return (rl_history_search_internal (abs (count), (count > 0) ? 1 : -1)); |
572 | } | |
573 | ||
574 | /* Search backward through the history for the string of characters | |
575 | from the start of the line to rl_point. This is a non-incremental | |
576 | search. */ | |
577 | int | |
578 | rl_history_search_backward (count, ignore) | |
579 | int count, ignore; | |
580 | { | |
581 | if (count == 0) | |
582 | return (0); | |
1b17e766 EZ |
583 | |
584 | if (rl_last_func != rl_history_search_forward && | |
585 | rl_last_func != rl_history_search_backward) | |
775e241e TT |
586 | rl_history_search_reinit (ANCHORED_SEARCH); |
587 | ||
588 | if (rl_history_search_len == 0) | |
589 | return (rl_get_previous_history (count, ignore)); | |
590 | return (rl_history_search_internal (abs (count), (count > 0) ? -1 : 1)); | |
591 | } | |
592 | ||
593 | /* Search forward in the history for the string of characters | |
594 | from the start of the line to rl_point. This is a non-incremental | |
595 | search. The search succeeds if the search string is present anywhere | |
596 | in the history line. */ | |
597 | int | |
598 | rl_history_substr_search_forward (count, ignore) | |
599 | int count, ignore; | |
600 | { | |
601 | if (count == 0) | |
602 | return (0); | |
603 | ||
604 | if (rl_last_func != rl_history_substr_search_forward && | |
605 | rl_last_func != rl_history_substr_search_backward) | |
606 | rl_history_search_reinit (NON_ANCHORED_SEARCH); | |
607 | ||
608 | if (rl_history_search_len == 0) | |
609 | return (rl_get_next_history (count, ignore)); | |
610 | return (rl_history_search_internal (abs (count), (count > 0) ? 1 : -1)); | |
611 | } | |
612 | ||
613 | /* Search backward through the history for the string of characters | |
614 | from the start of the line to rl_point. This is a non-incremental | |
615 | search. */ | |
616 | int | |
617 | rl_history_substr_search_backward (count, ignore) | |
618 | int count, ignore; | |
619 | { | |
620 | if (count == 0) | |
621 | return (0); | |
622 | ||
623 | if (rl_last_func != rl_history_substr_search_forward && | |
624 | rl_last_func != rl_history_substr_search_backward) | |
625 | rl_history_search_reinit (NON_ANCHORED_SEARCH); | |
1b17e766 EZ |
626 | |
627 | if (rl_history_search_len == 0) | |
628 | return (rl_get_previous_history (count, ignore)); | |
d60d9f65 SS |
629 | return (rl_history_search_internal (abs (count), (count > 0) ? -1 : 1)); |
630 | } |