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726f6388 JA |
1 | /* search.c - code for non-incremental searching in emacs and vi modes. */ |
2 | ||
95732b49 | 3 | /* Copyright (C) 1992-2005 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of the Readline Library (the Library), a set of | |
6 | routines for providing Emacs style line input to programs that ask | |
7 | for it. | |
8 | ||
9 | The Library is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
bb70624e | 11 | the Free Software Foundation; either version 2, or (at your option) |
726f6388 JA |
12 | any later version. |
13 | ||
14 | The Library is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | 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, | |
bb70624e | 22 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 JA |
23 | #define READLINE_LIBRARY |
24 | ||
ccc6cda3 JA |
25 | #if defined (HAVE_CONFIG_H) |
26 | # include <config.h> | |
27 | #endif | |
28 | ||
726f6388 JA |
29 | #include <sys/types.h> |
30 | #include <stdio.h> | |
31 | ||
32 | #if defined (HAVE_UNISTD_H) | |
33 | # include <unistd.h> | |
34 | #endif | |
35 | ||
d166f048 JA |
36 | #if defined (HAVE_STDLIB_H) |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif | |
41 | ||
726f6388 | 42 | #include "rldefs.h" |
7117c2d2 JA |
43 | #include "rlmbutil.h" |
44 | ||
726f6388 JA |
45 | #include "readline.h" |
46 | #include "history.h" | |
47 | ||
bb70624e JA |
48 | #include "rlprivate.h" |
49 | #include "xmalloc.h" | |
50 | ||
d166f048 JA |
51 | #ifdef abs |
52 | # undef abs | |
53 | #endif | |
54 | #define abs(x) (((x) >= 0) ? (x) : -(x)) | |
726f6388 | 55 | |
95732b49 JA |
56 | _rl_search_cxt *_rl_nscxt = 0; |
57 | ||
28ef6c31 | 58 | extern HIST_ENTRY *_rl_saved_line_for_history; |
726f6388 JA |
59 | |
60 | /* Functions imported from the rest of the library. */ | |
f73dda09 | 61 | extern int _rl_free_history_entry PARAMS((HIST_ENTRY *)); |
726f6388 JA |
62 | |
63 | static char *noninc_search_string = (char *) NULL; | |
ccc6cda3 | 64 | static int noninc_history_pos; |
bb70624e | 65 | |
726f6388 JA |
66 | static char *prev_line_found = (char *) NULL; |
67 | ||
bb70624e JA |
68 | static int rl_history_search_len; |
69 | static int rl_history_search_pos; | |
70 | static char *history_search_string; | |
71 | static int history_string_size; | |
72 | ||
f73dda09 JA |
73 | static void make_history_line_current PARAMS((HIST_ENTRY *)); |
74 | static int noninc_search_from_pos PARAMS((char *, int, int)); | |
95732b49 JA |
75 | static int noninc_dosearch PARAMS((char *, int)); |
76 | static int noninc_search PARAMS((int, int)); | |
f73dda09 JA |
77 | static int rl_history_search_internal PARAMS((int, int)); |
78 | static void rl_history_search_reinit PARAMS((void)); | |
79 | ||
95732b49 JA |
80 | static _rl_search_cxt *_rl_nsearch_init PARAMS((int, int)); |
81 | static int _rl_nsearch_cleanup PARAMS((_rl_search_cxt *, int)); | |
82 | static void _rl_nsearch_abort PARAMS((_rl_search_cxt *)); | |
83 | static int _rl_nsearch_dispatch PARAMS((_rl_search_cxt *, int)); | |
84 | ||
bb70624e JA |
85 | /* Make the data from the history entry ENTRY be the contents of the |
86 | current line. This doesn't do anything with rl_point; the caller | |
87 | must set it. */ | |
88 | static void | |
89 | make_history_line_current (entry) | |
90 | HIST_ENTRY *entry; | |
91 | { | |
b80f6443 JA |
92 | _rl_replace_text (entry->line, 0, rl_end); |
93 | _rl_fix_point (1); | |
95732b49 JA |
94 | #if defined (VI_MODE) |
95 | if (rl_editing_mode == vi_mode) | |
96 | /* POSIX.2 says that the `U' command doesn't affect the copy of any | |
97 | command lines to the edit line. We're going to implement that by | |
98 | making the undo list start after the matching line is copied to the | |
99 | current editing buffer. */ | |
100 | rl_free_undo_list (); | |
b80f6443 | 101 | #endif |
bb70624e | 102 | |
28ef6c31 JA |
103 | if (_rl_saved_line_for_history) |
104 | _rl_free_history_entry (_rl_saved_line_for_history); | |
105 | _rl_saved_line_for_history = (HIST_ENTRY *)NULL; | |
bb70624e JA |
106 | } |
107 | ||
726f6388 JA |
108 | /* Search the history list for STRING starting at absolute history position |
109 | POS. If STRING begins with `^', the search must match STRING at the | |
110 | beginning of a history line, otherwise a full substring match is performed | |
111 | for STRING. DIR < 0 means to search backwards through the history list, | |
112 | DIR >= 0 means to search forward. */ | |
113 | static int | |
114 | noninc_search_from_pos (string, pos, dir) | |
115 | char *string; | |
116 | int pos, dir; | |
117 | { | |
118 | int ret, old; | |
119 | ||
28ef6c31 JA |
120 | if (pos < 0) |
121 | return -1; | |
122 | ||
726f6388 | 123 | old = where_history (); |
28ef6c31 JA |
124 | if (history_set_pos (pos) == 0) |
125 | return -1; | |
726f6388 | 126 | |
28ef6c31 | 127 | RL_SETSTATE(RL_STATE_SEARCH); |
726f6388 JA |
128 | if (*string == '^') |
129 | ret = history_search_prefix (string + 1, dir); | |
130 | else | |
131 | ret = history_search (string, dir); | |
28ef6c31 | 132 | RL_UNSETSTATE(RL_STATE_SEARCH); |
726f6388 JA |
133 | |
134 | if (ret != -1) | |
135 | ret = where_history (); | |
136 | ||
137 | history_set_pos (old); | |
138 | return (ret); | |
139 | } | |
140 | ||
141 | /* Search for a line in the history containing STRING. If DIR is < 0, the | |
142 | search is backwards through previous entries, else through subsequent | |
95732b49 JA |
143 | entries. Returns 1 if the search was successful, 0 otherwise. */ |
144 | static int | |
726f6388 JA |
145 | noninc_dosearch (string, dir) |
146 | char *string; | |
147 | int dir; | |
148 | { | |
bb70624e | 149 | int oldpos, pos; |
726f6388 JA |
150 | HIST_ENTRY *entry; |
151 | ||
152 | if (string == 0 || *string == '\0' || noninc_history_pos < 0) | |
153 | { | |
28ef6c31 | 154 | rl_ding (); |
95732b49 | 155 | return 0; |
726f6388 JA |
156 | } |
157 | ||
158 | pos = noninc_search_from_pos (string, noninc_history_pos + dir, dir); | |
159 | if (pos == -1) | |
160 | { | |
161 | /* Search failed, current history position unchanged. */ | |
28ef6c31 | 162 | rl_maybe_unsave_line (); |
726f6388 JA |
163 | rl_clear_message (); |
164 | rl_point = 0; | |
28ef6c31 | 165 | rl_ding (); |
95732b49 | 166 | return 0; |
726f6388 JA |
167 | } |
168 | ||
169 | noninc_history_pos = pos; | |
170 | ||
171 | oldpos = where_history (); | |
172 | history_set_pos (noninc_history_pos); | |
173 | entry = current_history (); | |
174 | #if defined (VI_MODE) | |
175 | if (rl_editing_mode != vi_mode) | |
176 | #endif | |
95732b49 | 177 | history_set_pos (oldpos); |
726f6388 | 178 | |
bb70624e | 179 | make_history_line_current (entry); |
726f6388 | 180 | |
726f6388 | 181 | rl_point = 0; |
7117c2d2 JA |
182 | rl_mark = rl_end; |
183 | ||
726f6388 | 184 | rl_clear_message (); |
95732b49 | 185 | return 1; |
726f6388 JA |
186 | } |
187 | ||
95732b49 JA |
188 | static _rl_search_cxt * |
189 | _rl_nsearch_init (dir, pchar) | |
190 | int dir, pchar; | |
726f6388 | 191 | { |
95732b49 | 192 | _rl_search_cxt *cxt; |
726f6388 | 193 | char *p; |
95732b49 JA |
194 | |
195 | cxt = _rl_scxt_alloc (RL_SEARCH_NSEARCH, 0); | |
196 | if (dir < 0) | |
197 | cxt->sflags |= SF_REVERSE; /* not strictly needed */ | |
198 | ||
199 | cxt->direction = dir; | |
200 | cxt->history_pos = cxt->save_line; | |
726f6388 | 201 | |
28ef6c31 | 202 | rl_maybe_save_line (); |
726f6388 | 203 | |
b80f6443 JA |
204 | /* Clear the undo list, since reading the search string should create its |
205 | own undo list, and the whole list will end up being freed when we | |
206 | finish reading the search string. */ | |
207 | rl_undo_list = 0; | |
208 | ||
726f6388 JA |
209 | /* Use the line buffer to read the search string. */ |
210 | rl_line_buffer[0] = 0; | |
211 | rl_end = rl_point = 0; | |
212 | ||
ccc6cda3 | 213 | p = _rl_make_prompt_for_search (pchar ? pchar : ':'); |
0628567a | 214 | rl_message ("%s", p, 0); |
726f6388 JA |
215 | free (p); |
216 | ||
28ef6c31 | 217 | RL_SETSTATE(RL_STATE_NSEARCH); |
95732b49 JA |
218 | |
219 | _rl_nscxt = cxt; | |
220 | ||
221 | return cxt; | |
222 | } | |
223 | ||
224 | static int | |
225 | _rl_nsearch_cleanup (cxt, r) | |
226 | _rl_search_cxt *cxt; | |
227 | int r; | |
228 | { | |
229 | _rl_scxt_dispose (cxt, 0); | |
230 | _rl_nscxt = 0; | |
231 | ||
232 | RL_UNSETSTATE(RL_STATE_NSEARCH); | |
233 | ||
234 | return (r != 1); | |
235 | } | |
236 | ||
237 | static void | |
238 | _rl_nsearch_abort (cxt) | |
239 | _rl_search_cxt *cxt; | |
240 | { | |
241 | rl_maybe_unsave_line (); | |
242 | rl_clear_message (); | |
243 | rl_point = cxt->save_point; | |
244 | rl_mark = cxt->save_mark; | |
245 | rl_restore_prompt (); | |
246 | ||
247 | RL_UNSETSTATE (RL_STATE_NSEARCH); | |
248 | } | |
249 | ||
250 | /* Process just-read character C according to search context CXT. Return -1 | |
251 | if the caller should abort the search, 0 if we should break out of the | |
252 | loop, and 1 if we should continue to read characters. */ | |
253 | static int | |
254 | _rl_nsearch_dispatch (cxt, c) | |
255 | _rl_search_cxt *cxt; | |
256 | int c; | |
257 | { | |
258 | switch (c) | |
726f6388 | 259 | { |
95732b49 JA |
260 | case CTRL('W'): |
261 | rl_unix_word_rubout (1, c); | |
262 | break; | |
28ef6c31 | 263 | |
95732b49 JA |
264 | case CTRL('U'): |
265 | rl_unix_line_discard (1, c); | |
266 | break; | |
7117c2d2 | 267 | |
95732b49 JA |
268 | case RETURN: |
269 | case NEWLINE: | |
270 | return 0; | |
28ef6c31 | 271 | |
95732b49 JA |
272 | case CTRL('H'): |
273 | case RUBOUT: | |
274 | if (rl_point == 0) | |
726f6388 | 275 | { |
95732b49 JA |
276 | _rl_nsearch_abort (cxt); |
277 | return -1; | |
278 | } | |
279 | _rl_rubout_char (1, c); | |
280 | break; | |
726f6388 | 281 | |
95732b49 JA |
282 | case CTRL('C'): |
283 | case CTRL('G'): | |
284 | rl_ding (); | |
285 | _rl_nsearch_abort (cxt); | |
286 | return -1; | |
287 | ||
288 | default: | |
7117c2d2 | 289 | #if defined (HANDLE_MULTIBYTE) |
95732b49 JA |
290 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
291 | rl_insert_text (cxt->mb); | |
292 | else | |
7117c2d2 | 293 | #endif |
95732b49 JA |
294 | _rl_insert_char (1, c); |
295 | break; | |
726f6388 JA |
296 | } |
297 | ||
95732b49 JA |
298 | (*rl_redisplay_function) (); |
299 | return 1; | |
300 | } | |
301 | ||
302 | /* Perform one search according to CXT, using NONINC_SEARCH_STRING. Return | |
303 | -1 if the search should be aborted, any other value means to clean up | |
304 | using _rl_nsearch_cleanup (). Returns 1 if the search was successful, | |
305 | 0 otherwise. */ | |
306 | static int | |
307 | _rl_nsearch_dosearch (cxt) | |
308 | _rl_search_cxt *cxt; | |
309 | { | |
310 | rl_mark = cxt->save_mark; | |
7117c2d2 | 311 | |
726f6388 JA |
312 | /* If rl_point == 0, we want to re-use the previous search string and |
313 | start from the saved history position. If there's no previous search | |
314 | string, punt. */ | |
315 | if (rl_point == 0) | |
316 | { | |
95732b49 | 317 | if (noninc_search_string == 0) |
726f6388 | 318 | { |
28ef6c31 | 319 | rl_ding (); |
95732b49 JA |
320 | rl_restore_prompt (); |
321 | RL_UNSETSTATE (RL_STATE_NSEARCH); | |
322 | return -1; | |
726f6388 JA |
323 | } |
324 | } | |
325 | else | |
326 | { | |
327 | /* We want to start the search from the current history position. */ | |
95732b49 | 328 | noninc_history_pos = cxt->save_line; |
bb70624e | 329 | FREE (noninc_search_string); |
726f6388 | 330 | noninc_search_string = savestring (rl_line_buffer); |
95732b49 JA |
331 | |
332 | /* If we don't want the subsequent undo list generated by the search | |
333 | matching a history line to include the contents of the search string, | |
334 | we need to clear rl_line_buffer here. For now, we just clear the | |
335 | undo list generated by reading the search string. (If the search | |
336 | fails, the old undo list will be restored by rl_maybe_unsave_line.) */ | |
337 | rl_free_undo_list (); | |
726f6388 JA |
338 | } |
339 | ||
b72432fd | 340 | rl_restore_prompt (); |
95732b49 JA |
341 | return (noninc_dosearch (noninc_search_string, cxt->direction)); |
342 | } | |
343 | ||
344 | /* Search non-interactively through the history list. DIR < 0 means to | |
345 | search backwards through the history of previous commands; otherwise | |
346 | the search is for commands subsequent to the current position in the | |
347 | history list. PCHAR is the character to use for prompting when reading | |
348 | the search string; if not specified (0), it defaults to `:'. */ | |
349 | static int | |
350 | noninc_search (dir, pchar) | |
351 | int dir; | |
352 | int pchar; | |
353 | { | |
354 | _rl_search_cxt *cxt; | |
355 | int c, r; | |
356 | ||
357 | cxt = _rl_nsearch_init (dir, pchar); | |
358 | ||
359 | if (RL_ISSTATE (RL_STATE_CALLBACK)) | |
360 | return (0); | |
361 | ||
362 | /* Read the search string. */ | |
363 | r = 0; | |
364 | while (1) | |
365 | { | |
366 | c = _rl_search_getchar (cxt); | |
367 | ||
368 | if (c == 0) | |
369 | break; | |
370 | ||
371 | r = _rl_nsearch_dispatch (cxt, c); | |
372 | if (r < 0) | |
373 | return 1; | |
374 | else if (r == 0) | |
375 | break; | |
376 | } | |
377 | ||
378 | r = _rl_nsearch_dosearch (cxt); | |
379 | return ((r >= 0) ? _rl_nsearch_cleanup (cxt, r) : (r != 1)); | |
726f6388 JA |
380 | } |
381 | ||
382 | /* Search forward through the history list for a string. If the vi-mode | |
383 | code calls this, KEY will be `?'. */ | |
ccc6cda3 | 384 | int |
726f6388 JA |
385 | rl_noninc_forward_search (count, key) |
386 | int count, key; | |
387 | { | |
95732b49 | 388 | return noninc_search (1, (key == '?') ? '?' : 0); |
726f6388 JA |
389 | } |
390 | ||
391 | /* Reverse search the history list for a string. If the vi-mode code | |
392 | calls this, KEY will be `/'. */ | |
ccc6cda3 | 393 | int |
726f6388 JA |
394 | rl_noninc_reverse_search (count, key) |
395 | int count, key; | |
396 | { | |
95732b49 | 397 | return noninc_search (-1, (key == '/') ? '/' : 0); |
726f6388 JA |
398 | } |
399 | ||
400 | /* Search forward through the history list for the last string searched | |
401 | for. If there is no saved search string, abort. */ | |
ccc6cda3 | 402 | int |
726f6388 JA |
403 | rl_noninc_forward_search_again (count, key) |
404 | int count, key; | |
405 | { | |
95732b49 JA |
406 | int r; |
407 | ||
726f6388 JA |
408 | if (!noninc_search_string) |
409 | { | |
28ef6c31 | 410 | rl_ding (); |
726f6388 JA |
411 | return (-1); |
412 | } | |
95732b49 JA |
413 | r = noninc_dosearch (noninc_search_string, 1); |
414 | return (r != 1); | |
726f6388 JA |
415 | } |
416 | ||
417 | /* Reverse search in the history list for the last string searched | |
418 | for. If there is no saved search string, abort. */ | |
ccc6cda3 | 419 | int |
726f6388 JA |
420 | rl_noninc_reverse_search_again (count, key) |
421 | int count, key; | |
422 | { | |
95732b49 JA |
423 | int r; |
424 | ||
726f6388 JA |
425 | if (!noninc_search_string) |
426 | { | |
28ef6c31 | 427 | rl_ding (); |
726f6388 JA |
428 | return (-1); |
429 | } | |
95732b49 JA |
430 | r = noninc_dosearch (noninc_search_string, -1); |
431 | return (r != 1); | |
726f6388 JA |
432 | } |
433 | ||
95732b49 JA |
434 | #if defined (READLINE_CALLBACKS) |
435 | int | |
436 | _rl_nsearch_callback (cxt) | |
437 | _rl_search_cxt *cxt; | |
438 | { | |
439 | int c, r; | |
440 | ||
441 | c = _rl_search_getchar (cxt); | |
442 | r = _rl_nsearch_dispatch (cxt, c); | |
443 | if (r != 0) | |
444 | return 1; | |
445 | ||
446 | r = _rl_nsearch_dosearch (cxt); | |
447 | return ((r >= 0) ? _rl_nsearch_cleanup (cxt, r) : (r != 1)); | |
448 | } | |
449 | #endif | |
450 | ||
726f6388 | 451 | static int |
bb70624e JA |
452 | rl_history_search_internal (count, dir) |
453 | int count, dir; | |
726f6388 | 454 | { |
bb70624e JA |
455 | HIST_ENTRY *temp; |
456 | int ret, oldpos; | |
726f6388 | 457 | |
28ef6c31 | 458 | rl_maybe_save_line (); |
bb70624e | 459 | temp = (HIST_ENTRY *)NULL; |
726f6388 | 460 | |
bb70624e JA |
461 | /* Search COUNT times through the history for a line whose prefix |
462 | matches history_search_string. When this loop finishes, TEMP, | |
463 | if non-null, is the history line to copy into the line buffer. */ | |
726f6388 JA |
464 | while (count) |
465 | { | |
bb70624e JA |
466 | ret = noninc_search_from_pos (history_search_string, rl_history_search_pos + dir, dir); |
467 | if (ret == -1) | |
468 | break; | |
469 | ||
470 | /* Get the history entry we found. */ | |
471 | rl_history_search_pos = ret; | |
472 | oldpos = where_history (); | |
473 | history_set_pos (rl_history_search_pos); | |
474 | temp = current_history (); | |
475 | history_set_pos (oldpos); | |
476 | ||
477 | /* Don't find multiple instances of the same line. */ | |
478 | if (prev_line_found && STREQ (prev_line_found, temp->line)) | |
479 | continue; | |
480 | prev_line_found = temp->line; | |
481 | count--; | |
726f6388 JA |
482 | } |
483 | ||
bb70624e | 484 | /* If we didn't find anything at all, return. */ |
ccc6cda3 | 485 | if (temp == 0) |
726f6388 | 486 | { |
28ef6c31 JA |
487 | rl_maybe_unsave_line (); |
488 | rl_ding (); | |
bb70624e JA |
489 | /* If you don't want the saved history line (last match) to show up |
490 | in the line buffer after the search fails, change the #if 0 to | |
491 | #if 1 */ | |
492 | #if 0 | |
493 | if (rl_point > rl_history_search_len) | |
494 | { | |
495 | rl_point = rl_end = rl_history_search_len; | |
496 | rl_line_buffer[rl_end] = '\0'; | |
7117c2d2 | 497 | rl_mark = 0; |
bb70624e JA |
498 | } |
499 | #else | |
28ef6c31 | 500 | rl_point = rl_history_search_len; /* rl_maybe_unsave_line changes it */ |
7117c2d2 | 501 | rl_mark = rl_end; |
bb70624e JA |
502 | #endif |
503 | return 1; | |
726f6388 JA |
504 | } |
505 | ||
bb70624e JA |
506 | /* Copy the line we found into the current line buffer. */ |
507 | make_history_line_current (temp); | |
508 | ||
509 | rl_point = rl_history_search_len; | |
7117c2d2 JA |
510 | rl_mark = rl_end; |
511 | ||
726f6388 JA |
512 | return 0; |
513 | } | |
514 | ||
bb70624e JA |
515 | static void |
516 | rl_history_search_reinit () | |
517 | { | |
518 | rl_history_search_pos = where_history (); | |
519 | rl_history_search_len = rl_point; | |
520 | prev_line_found = (char *)NULL; | |
521 | if (rl_point) | |
522 | { | |
523 | if (rl_history_search_len >= history_string_size - 2) | |
524 | { | |
525 | history_string_size = rl_history_search_len + 2; | |
f73dda09 | 526 | history_search_string = (char *)xrealloc (history_search_string, history_string_size); |
bb70624e JA |
527 | } |
528 | history_search_string[0] = '^'; | |
529 | strncpy (history_search_string + 1, rl_line_buffer, rl_point); | |
530 | history_search_string[rl_point + 1] = '\0'; | |
531 | } | |
28ef6c31 | 532 | _rl_free_saved_history_line (); |
bb70624e JA |
533 | } |
534 | ||
726f6388 JA |
535 | /* Search forward in the history for the string of characters |
536 | from the start of the line to rl_point. This is a non-incremental | |
537 | search. */ | |
538 | int | |
539 | rl_history_search_forward (count, ignore) | |
540 | int count, ignore; | |
541 | { | |
542 | if (count == 0) | |
543 | return (0); | |
bb70624e JA |
544 | |
545 | if (rl_last_func != rl_history_search_forward && | |
546 | rl_last_func != rl_history_search_backward) | |
547 | rl_history_search_reinit (); | |
548 | ||
549 | if (rl_history_search_len == 0) | |
550 | return (rl_get_next_history (count, ignore)); | |
726f6388 JA |
551 | return (rl_history_search_internal (abs (count), (count > 0) ? 1 : -1)); |
552 | } | |
553 | ||
554 | /* Search backward through the history for the string of characters | |
555 | from the start of the line to rl_point. This is a non-incremental | |
556 | search. */ | |
557 | int | |
558 | rl_history_search_backward (count, ignore) | |
559 | int count, ignore; | |
560 | { | |
561 | if (count == 0) | |
562 | return (0); | |
bb70624e JA |
563 | |
564 | if (rl_last_func != rl_history_search_forward && | |
565 | rl_last_func != rl_history_search_backward) | |
566 | rl_history_search_reinit (); | |
567 | ||
568 | if (rl_history_search_len == 0) | |
569 | return (rl_get_previous_history (count, ignore)); | |
726f6388 JA |
570 | return (rl_history_search_internal (abs (count), (count > 0) ? -1 : 1)); |
571 | } |