Commit | Line | Data |
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c5f0f3d0 | 1 | /* Line completion stuff for GDB, the GNU debugger. |
61baf725 | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
c5f0f3d0 FN |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
c5f0f3d0 FN |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c5f0f3d0 FN |
18 | |
19 | #include "defs.h" | |
20 | #include "symtab.h" | |
21 | #include "gdbtypes.h" | |
22 | #include "expression.h" | |
9c3f90bd | 23 | #include "filenames.h" /* For DOSish file names. */ |
51065942 | 24 | #include "language.h" |
de0bea00 | 25 | #include "gdb_signals.h" |
71c24708 AA |
26 | #include "target.h" |
27 | #include "reggroups.h" | |
28 | #include "user-regs.h" | |
51f0e40d | 29 | #include "arch-utils.h" |
87f0e720 | 30 | #include "location.h" |
eb3ff9a5 | 31 | #include <algorithm> |
c6756f62 | 32 | #include "linespec.h" |
18a642a1 AC |
33 | #include "cli/cli-decode.h" |
34 | ||
03717487 MS |
35 | /* FIXME: This is needed because of lookup_cmd_1 (). We should be |
36 | calling a hook instead so we eliminate the CLI dependency. */ | |
c5f0f3d0 FN |
37 | #include "gdbcmd.h" |
38 | ||
c94fdfd0 | 39 | /* Needed for rl_completer_word_break_characters() and for |
38017ce8 | 40 | rl_filename_completion_function. */ |
dbda9972 | 41 | #include "readline/readline.h" |
c5f0f3d0 FN |
42 | |
43 | /* readline defines this. */ | |
44 | #undef savestring | |
45 | ||
46 | #include "completer.h" | |
47 | ||
eb3ff9a5 PA |
48 | /* Misc state that needs to be tracked across several different |
49 | readline completer entry point calls, all related to a single | |
50 | completion invocation. */ | |
51 | ||
52 | struct gdb_completer_state | |
53 | { | |
54 | /* The current completion's completion tracker. This is a global | |
55 | because a tracker can be shared between the handle_brkchars and | |
56 | handle_completion phases, which involves different readline | |
57 | callbacks. */ | |
58 | completion_tracker *tracker = NULL; | |
59 | ||
60 | /* Whether the current completion was aborted. */ | |
61 | bool aborted = false; | |
62 | }; | |
63 | ||
64 | /* The current completion state. */ | |
65 | static gdb_completer_state current_completion; | |
66 | ||
c6756f62 PA |
67 | /* An enumeration of the various things a user might attempt to |
68 | complete for a location. If you change this, remember to update | |
69 | the explicit_options array below too. */ | |
87f0e720 KS |
70 | |
71 | enum explicit_location_match_type | |
72 | { | |
73 | /* The filename of a source file. */ | |
74 | MATCH_SOURCE, | |
75 | ||
76 | /* The name of a function or method. */ | |
77 | MATCH_FUNCTION, | |
78 | ||
c6756f62 PA |
79 | /* A line number. */ |
80 | MATCH_LINE, | |
81 | ||
87f0e720 KS |
82 | /* The name of a label. */ |
83 | MATCH_LABEL | |
84 | }; | |
85 | ||
9c3f90bd | 86 | /* Prototypes for local functions. */ |
c5f0f3d0 FN |
87 | |
88 | /* readline uses the word breaks for two things: | |
89 | (1) In figuring out where to point the TEXT parameter to the | |
90 | rl_completion_entry_function. Since we don't use TEXT for much, | |
aff410f1 MS |
91 | it doesn't matter a lot what the word breaks are for this purpose, |
92 | but it does affect how much stuff M-? lists. | |
c5f0f3d0 FN |
93 | (2) If one of the matches contains a word break character, readline |
94 | will quote it. That's why we switch between | |
51065942 | 95 | current_language->la_word_break_characters() and |
c5f0f3d0 | 96 | gdb_completer_command_word_break_characters. I'm not sure when |
aff410f1 MS |
97 | we need this behavior (perhaps for funky characters in C++ |
98 | symbols?). */ | |
c5f0f3d0 FN |
99 | |
100 | /* Variables which are necessary for fancy command line editing. */ | |
c5f0f3d0 FN |
101 | |
102 | /* When completing on command names, we remove '-' from the list of | |
103 | word break characters, since we use it in command names. If the | |
104 | readline library sees one in any of the current completion strings, | |
aff410f1 MS |
105 | it thinks that the string needs to be quoted and automatically |
106 | supplies a leading quote. */ | |
67cb5b2d | 107 | static const char gdb_completer_command_word_break_characters[] = |
c5f0f3d0 FN |
108 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,"; |
109 | ||
110 | /* When completing on file names, we remove from the list of word | |
111 | break characters any characters that are commonly used in file | |
112 | names, such as '-', '+', '~', etc. Otherwise, readline displays | |
113 | incorrect completion candidates. */ | |
7830cf6f EZ |
114 | /* MS-DOS and MS-Windows use colon as part of the drive spec, and most |
115 | programs support @foo style response files. */ | |
67cb5b2d PA |
116 | static const char gdb_completer_file_name_break_characters[] = |
117 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
118 | " \t\n*|\"';?><@"; | |
7830cf6f | 119 | #else |
67cb5b2d | 120 | " \t\n*|\"';:?><"; |
7830cf6f | 121 | #endif |
c5f0f3d0 | 122 | |
aff410f1 MS |
123 | /* Characters that can be used to quote completion strings. Note that |
124 | we can't include '"' because the gdb C parser treats such quoted | |
125 | sequences as strings. */ | |
67cb5b2d | 126 | static const char gdb_completer_quote_characters[] = "'"; |
c5f0f3d0 | 127 | \f |
9c3f90bd | 128 | /* Accessor for some completer data that may interest other files. */ |
c5f0f3d0 | 129 | |
67cb5b2d | 130 | const char * |
c5f0f3d0 FN |
131 | get_gdb_completer_quote_characters (void) |
132 | { | |
133 | return gdb_completer_quote_characters; | |
134 | } | |
135 | ||
aff410f1 MS |
136 | /* This can be used for functions which don't want to complete on |
137 | symbols but don't want to complete on anything else either. */ | |
eb3ff9a5 PA |
138 | |
139 | void | |
aff410f1 | 140 | noop_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 141 | completion_tracker &tracker, |
6f937416 | 142 | const char *text, const char *prefix) |
d75b5104 | 143 | { |
d75b5104 EZ |
144 | } |
145 | ||
c5f0f3d0 | 146 | /* Complete on filenames. */ |
6e1dbf8c | 147 | |
eb3ff9a5 PA |
148 | void |
149 | filename_completer (struct cmd_list_element *ignore, | |
150 | completion_tracker &tracker, | |
6f937416 | 151 | const char *text, const char *word) |
c5f0f3d0 | 152 | { |
c5f0f3d0 | 153 | int subsequent_name; |
49c4e619 | 154 | VEC (char_ptr) *return_val = NULL; |
c5f0f3d0 FN |
155 | |
156 | subsequent_name = 0; | |
157 | while (1) | |
158 | { | |
1e8189fb | 159 | char *p, *q; |
c5504eaf | 160 | |
38017ce8 | 161 | p = rl_filename_completion_function (text, subsequent_name); |
c5f0f3d0 | 162 | if (p == NULL) |
49c4e619 | 163 | break; |
c5f0f3d0 | 164 | /* We need to set subsequent_name to a non-zero value before the |
aff410f1 MS |
165 | continue line below, because otherwise, if the first file |
166 | seen by GDB is a backup file whose name ends in a `~', we | |
167 | will loop indefinitely. */ | |
c5f0f3d0 | 168 | subsequent_name = 1; |
aff410f1 MS |
169 | /* Like emacs, don't complete on old versions. Especially |
170 | useful in the "source" command. */ | |
c5f0f3d0 | 171 | if (p[strlen (p) - 1] == '~') |
1e8189fb MS |
172 | { |
173 | xfree (p); | |
174 | continue; | |
175 | } | |
c5f0f3d0 | 176 | |
1e8189fb MS |
177 | if (word == text) |
178 | /* Return exactly p. */ | |
49c4e619 | 179 | q = p; |
1e8189fb MS |
180 | else if (word > text) |
181 | { | |
182 | /* Return some portion of p. */ | |
224c3ddb | 183 | q = (char *) xmalloc (strlen (p) + 5); |
1e8189fb | 184 | strcpy (q, p + (word - text)); |
1e8189fb MS |
185 | xfree (p); |
186 | } | |
187 | else | |
188 | { | |
189 | /* Return some of TEXT plus p. */ | |
224c3ddb | 190 | q = (char *) xmalloc (strlen (p) + (text - word) + 5); |
1e8189fb MS |
191 | strncpy (q, word, text - word); |
192 | q[text - word] = '\0'; | |
193 | strcat (q, p); | |
1e8189fb MS |
194 | xfree (p); |
195 | } | |
eb3ff9a5 | 196 | tracker.add_completion (gdb::unique_xmalloc_ptr<char> (q)); |
c5f0f3d0 FN |
197 | } |
198 | #if 0 | |
aff410f1 MS |
199 | /* There is no way to do this just long enough to affect quote |
200 | inserting without also affecting the next completion. This | |
201 | should be fixed in readline. FIXME. */ | |
489f0516 | 202 | /* Ensure that readline does the right thing |
c5f0f3d0 FN |
203 | with respect to inserting quotes. */ |
204 | rl_completer_word_break_characters = ""; | |
205 | #endif | |
c5f0f3d0 FN |
206 | } |
207 | ||
6e1dbf8c PA |
208 | /* The corresponding completer_handle_brkchars |
209 | implementation. */ | |
210 | ||
211 | static void | |
212 | filename_completer_handle_brkchars (struct cmd_list_element *ignore, | |
eb3ff9a5 | 213 | completion_tracker &tracker, |
6e1dbf8c PA |
214 | const char *text, const char *word) |
215 | { | |
216 | set_rl_completer_word_break_characters | |
217 | (gdb_completer_file_name_break_characters); | |
218 | } | |
219 | ||
6a2c1b87 PA |
220 | /* Possible values for the found_quote flags word used by the completion |
221 | functions. It says what kind of (shell-like) quoting we found anywhere | |
222 | in the line. */ | |
223 | #define RL_QF_SINGLE_QUOTE 0x01 | |
224 | #define RL_QF_DOUBLE_QUOTE 0x02 | |
225 | #define RL_QF_BACKSLASH 0x04 | |
226 | #define RL_QF_OTHER_QUOTE 0x08 | |
227 | ||
228 | /* Find the bounds of the current word for completion purposes, and | |
229 | return a pointer to the end of the word. This mimics (and is a | |
230 | modified version of) readline's _rl_find_completion_word internal | |
231 | function. | |
232 | ||
233 | This function skips quoted substrings (characters between matched | |
234 | pairs of characters in rl_completer_quote_characters). We try to | |
235 | find an unclosed quoted substring on which to do matching. If one | |
236 | is not found, we use the word break characters to find the | |
237 | boundaries of the current word. QC, if non-null, is set to the | |
238 | opening quote character if we found an unclosed quoted substring, | |
239 | '\0' otherwise. DP, if non-null, is set to the value of the | |
240 | delimiter character that caused a word break. */ | |
241 | ||
242 | struct gdb_rl_completion_word_info | |
243 | { | |
244 | const char *word_break_characters; | |
245 | const char *quote_characters; | |
246 | const char *basic_quote_characters; | |
247 | }; | |
248 | ||
249 | static const char * | |
250 | gdb_rl_find_completion_word (struct gdb_rl_completion_word_info *info, | |
251 | int *qc, int *dp, | |
252 | const char *line_buffer) | |
253 | { | |
254 | int scan, end, found_quote, delimiter, pass_next, isbrk; | |
255 | char quote_char; | |
256 | const char *brkchars; | |
257 | int point = strlen (line_buffer); | |
258 | ||
259 | /* The algorithm below does '--point'. Avoid buffer underflow with | |
260 | the empty string. */ | |
261 | if (point == 0) | |
262 | { | |
263 | if (qc != NULL) | |
264 | *qc = '\0'; | |
265 | if (dp != NULL) | |
266 | *dp = '\0'; | |
267 | return line_buffer; | |
268 | } | |
269 | ||
270 | end = point; | |
271 | found_quote = delimiter = 0; | |
272 | quote_char = '\0'; | |
273 | ||
274 | brkchars = info->word_break_characters; | |
275 | ||
276 | if (info->quote_characters != NULL) | |
277 | { | |
278 | /* We have a list of characters which can be used in pairs to | |
279 | quote substrings for the completer. Try to find the start of | |
280 | an unclosed quoted substring. */ | |
281 | /* FOUND_QUOTE is set so we know what kind of quotes we | |
282 | found. */ | |
283 | for (scan = pass_next = 0; | |
284 | scan < end; | |
285 | scan++) | |
286 | { | |
287 | if (pass_next) | |
288 | { | |
289 | pass_next = 0; | |
290 | continue; | |
291 | } | |
292 | ||
293 | /* Shell-like semantics for single quotes -- don't allow | |
294 | backslash to quote anything in single quotes, especially | |
295 | not the closing quote. If you don't like this, take out | |
296 | the check on the value of quote_char. */ | |
297 | if (quote_char != '\'' && line_buffer[scan] == '\\') | |
298 | { | |
299 | pass_next = 1; | |
300 | found_quote |= RL_QF_BACKSLASH; | |
301 | continue; | |
302 | } | |
303 | ||
304 | if (quote_char != '\0') | |
305 | { | |
306 | /* Ignore everything until the matching close quote | |
307 | char. */ | |
308 | if (line_buffer[scan] == quote_char) | |
309 | { | |
310 | /* Found matching close. Abandon this | |
311 | substring. */ | |
312 | quote_char = '\0'; | |
313 | point = end; | |
314 | } | |
315 | } | |
316 | else if (strchr (info->quote_characters, line_buffer[scan])) | |
317 | { | |
318 | /* Found start of a quoted substring. */ | |
319 | quote_char = line_buffer[scan]; | |
320 | point = scan + 1; | |
321 | /* Shell-like quoting conventions. */ | |
322 | if (quote_char == '\'') | |
323 | found_quote |= RL_QF_SINGLE_QUOTE; | |
324 | else if (quote_char == '"') | |
325 | found_quote |= RL_QF_DOUBLE_QUOTE; | |
326 | else | |
327 | found_quote |= RL_QF_OTHER_QUOTE; | |
328 | } | |
329 | } | |
330 | } | |
331 | ||
332 | if (point == end && quote_char == '\0') | |
333 | { | |
334 | /* We didn't find an unclosed quoted substring upon which to do | |
335 | completion, so use the word break characters to find the | |
336 | substring on which to complete. */ | |
337 | while (--point) | |
338 | { | |
339 | scan = line_buffer[point]; | |
340 | ||
341 | if (strchr (brkchars, scan) != 0) | |
342 | break; | |
343 | } | |
344 | } | |
345 | ||
346 | /* If we are at an unquoted word break, then advance past it. */ | |
347 | scan = line_buffer[point]; | |
348 | ||
349 | if (scan) | |
350 | { | |
351 | isbrk = strchr (brkchars, scan) != 0; | |
352 | ||
353 | if (isbrk) | |
354 | { | |
355 | /* If the character that caused the word break was a quoting | |
356 | character, then remember it as the delimiter. */ | |
357 | if (info->basic_quote_characters | |
358 | && strchr (info->basic_quote_characters, scan) | |
359 | && (end - point) > 1) | |
360 | delimiter = scan; | |
361 | ||
362 | point++; | |
363 | } | |
364 | } | |
365 | ||
366 | if (qc != NULL) | |
367 | *qc = quote_char; | |
368 | if (dp != NULL) | |
369 | *dp = delimiter; | |
370 | ||
371 | return line_buffer + point; | |
372 | } | |
373 | ||
c6756f62 PA |
374 | /* See completer.h. */ |
375 | ||
376 | const char * | |
377 | advance_to_expression_complete_word_point (completion_tracker &tracker, | |
378 | const char *text) | |
379 | { | |
380 | gdb_rl_completion_word_info info; | |
381 | ||
382 | info.word_break_characters | |
383 | = current_language->la_word_break_characters (); | |
384 | info.quote_characters = gdb_completer_quote_characters; | |
385 | info.basic_quote_characters = rl_basic_quote_characters; | |
386 | ||
387 | const char *start | |
388 | = gdb_rl_find_completion_word (&info, NULL, NULL, text); | |
389 | ||
390 | tracker.advance_custom_word_point_by (start - text); | |
391 | ||
392 | return start; | |
393 | } | |
394 | ||
395 | /* See completer.h. */ | |
396 | ||
397 | bool | |
398 | completion_tracker::completes_to_completion_word (const char *word) | |
399 | { | |
400 | if (m_lowest_common_denominator_unique) | |
401 | { | |
402 | const char *lcd = m_lowest_common_denominator; | |
403 | ||
404 | if (strncmp_iw (word, lcd, strlen (lcd)) == 0) | |
405 | { | |
406 | /* Maybe skip the function and complete on keywords. */ | |
407 | size_t wordlen = strlen (word); | |
408 | if (word[wordlen - 1] == ' ') | |
409 | return true; | |
410 | } | |
411 | } | |
412 | ||
413 | return false; | |
414 | } | |
415 | ||
87f0e720 | 416 | /* Complete on linespecs, which might be of two possible forms: |
c94fdfd0 EZ |
417 | |
418 | file:line | |
419 | or | |
420 | symbol+offset | |
421 | ||
aff410f1 MS |
422 | This is intended to be used in commands that set breakpoints |
423 | etc. */ | |
424 | ||
eb3ff9a5 PA |
425 | static void |
426 | complete_files_symbols (completion_tracker &tracker, | |
427 | const char *text, const char *word) | |
c94fdfd0 | 428 | { |
eb3ff9a5 PA |
429 | int ix; |
430 | completion_list fn_list; | |
6f937416 | 431 | const char *p; |
c94fdfd0 EZ |
432 | int quote_found = 0; |
433 | int quoted = *text == '\'' || *text == '"'; | |
434 | int quote_char = '\0'; | |
6f937416 | 435 | const char *colon = NULL; |
c94fdfd0 | 436 | char *file_to_match = NULL; |
6f937416 PA |
437 | const char *symbol_start = text; |
438 | const char *orig_text = text; | |
c94fdfd0 | 439 | |
59be2b6a | 440 | /* Do we have an unquoted colon, as in "break foo.c:bar"? */ |
c94fdfd0 EZ |
441 | for (p = text; *p != '\0'; ++p) |
442 | { | |
443 | if (*p == '\\' && p[1] == '\'') | |
444 | p++; | |
445 | else if (*p == '\'' || *p == '"') | |
446 | { | |
447 | quote_found = *p; | |
448 | quote_char = *p++; | |
449 | while (*p != '\0' && *p != quote_found) | |
450 | { | |
451 | if (*p == '\\' && p[1] == quote_found) | |
452 | p++; | |
453 | p++; | |
454 | } | |
455 | ||
456 | if (*p == quote_found) | |
457 | quote_found = 0; | |
458 | else | |
9c3f90bd | 459 | break; /* Hit the end of text. */ |
c94fdfd0 EZ |
460 | } |
461 | #if HAVE_DOS_BASED_FILE_SYSTEM | |
462 | /* If we have a DOS-style absolute file name at the beginning of | |
463 | TEXT, and the colon after the drive letter is the only colon | |
464 | we found, pretend the colon is not there. */ | |
465 | else if (p < text + 3 && *p == ':' && p == text + 1 + quoted) | |
466 | ; | |
467 | #endif | |
468 | else if (*p == ':' && !colon) | |
469 | { | |
470 | colon = p; | |
471 | symbol_start = p + 1; | |
472 | } | |
51065942 | 473 | else if (strchr (current_language->la_word_break_characters(), *p)) |
c94fdfd0 EZ |
474 | symbol_start = p + 1; |
475 | } | |
476 | ||
477 | if (quoted) | |
478 | text++; | |
c94fdfd0 EZ |
479 | |
480 | /* Where is the file name? */ | |
481 | if (colon) | |
482 | { | |
483 | char *s; | |
484 | ||
485 | file_to_match = (char *) xmalloc (colon - text + 1); | |
bbfa2517 YQ |
486 | strncpy (file_to_match, text, colon - text); |
487 | file_to_match[colon - text] = '\0'; | |
c94fdfd0 EZ |
488 | /* Remove trailing colons and quotes from the file name. */ |
489 | for (s = file_to_match + (colon - text); | |
490 | s > file_to_match; | |
491 | s--) | |
492 | if (*s == ':' || *s == quote_char) | |
493 | *s = '\0'; | |
494 | } | |
495 | /* If the text includes a colon, they want completion only on a | |
496 | symbol name after the colon. Otherwise, we need to complete on | |
497 | symbols as well as on files. */ | |
498 | if (colon) | |
499 | { | |
c6756f62 PA |
500 | collect_file_symbol_completion_matches (tracker, |
501 | complete_symbol_mode::EXPRESSION, | |
502 | symbol_start, word, | |
eb3ff9a5 | 503 | file_to_match); |
c94fdfd0 EZ |
504 | xfree (file_to_match); |
505 | } | |
506 | else | |
507 | { | |
eb3ff9a5 PA |
508 | size_t text_len = strlen (text); |
509 | ||
c6756f62 PA |
510 | collect_symbol_completion_matches (tracker, |
511 | complete_symbol_mode::EXPRESSION, | |
512 | symbol_start, word); | |
c94fdfd0 EZ |
513 | /* If text includes characters which cannot appear in a file |
514 | name, they cannot be asking for completion on files. */ | |
eb3ff9a5 | 515 | if (strcspn (text, |
1f20ed91 | 516 | gdb_completer_file_name_break_characters) == text_len) |
c94fdfd0 EZ |
517 | fn_list = make_source_files_completion_list (text, text); |
518 | } | |
519 | ||
eb3ff9a5 | 520 | if (!fn_list.empty () && !tracker.have_completions ()) |
c94fdfd0 | 521 | { |
6f937416 PA |
522 | char *fn; |
523 | ||
c94fdfd0 EZ |
524 | /* If we only have file names as possible completion, we should |
525 | bring them in sync with what rl_complete expects. The | |
526 | problem is that if the user types "break /foo/b TAB", and the | |
527 | possible completions are "/foo/bar" and "/foo/baz" | |
528 | rl_complete expects us to return "bar" and "baz", without the | |
529 | leading directories, as possible completions, because `word' | |
530 | starts at the "b". But we ignore the value of `word' when we | |
531 | call make_source_files_completion_list above (because that | |
532 | would not DTRT when the completion results in both symbols | |
533 | and file names), so make_source_files_completion_list returns | |
534 | the full "/foo/bar" and "/foo/baz" strings. This produces | |
535 | wrong results when, e.g., there's only one possible | |
536 | completion, because rl_complete will prepend "/foo/" to each | |
537 | candidate completion. The loop below removes that leading | |
538 | part. */ | |
eb3ff9a5 | 539 | for (const auto &fn_up: fn_list) |
c94fdfd0 | 540 | { |
eb3ff9a5 PA |
541 | char *fn = fn_up.get (); |
542 | memmove (fn, fn + (word - text), strlen (fn) + 1 - (word - text)); | |
c94fdfd0 | 543 | } |
c94fdfd0 | 544 | } |
eb3ff9a5 PA |
545 | |
546 | tracker.add_completions (std::move (fn_list)); | |
547 | ||
548 | if (!tracker.have_completions ()) | |
c94fdfd0 EZ |
549 | { |
550 | /* No completions at all. As the final resort, try completing | |
551 | on the entire text as a symbol. */ | |
eb3ff9a5 | 552 | collect_symbol_completion_matches (tracker, |
c6756f62 | 553 | complete_symbol_mode::EXPRESSION, |
eb3ff9a5 | 554 | orig_text, word); |
c94fdfd0 | 555 | } |
eb3ff9a5 PA |
556 | } |
557 | ||
c45ec17c PA |
558 | /* See completer.h. */ |
559 | ||
560 | completion_list | |
561 | complete_source_filenames (const char *text) | |
562 | { | |
563 | size_t text_len = strlen (text); | |
564 | ||
565 | /* If text includes characters which cannot appear in a file name, | |
566 | the user cannot be asking for completion on files. */ | |
567 | if (strcspn (text, | |
568 | gdb_completer_file_name_break_characters) | |
569 | == text_len) | |
570 | return make_source_files_completion_list (text, text); | |
571 | ||
572 | return {}; | |
573 | } | |
574 | ||
575 | /* Complete address and linespec locations. */ | |
576 | ||
577 | static void | |
578 | complete_address_and_linespec_locations (completion_tracker &tracker, | |
579 | const char *text) | |
580 | { | |
581 | if (*text == '*') | |
582 | { | |
583 | tracker.advance_custom_word_point_by (1); | |
584 | text++; | |
585 | const char *word | |
586 | = advance_to_expression_complete_word_point (tracker, text); | |
587 | complete_expression (tracker, text, word); | |
588 | } | |
589 | else | |
590 | { | |
591 | linespec_complete (tracker, text); | |
592 | } | |
593 | } | |
594 | ||
c6756f62 PA |
595 | /* The explicit location options. Note that indexes into this array |
596 | must match the explicit_location_match_type enumerators. */ | |
c45ec17c | 597 | |
c6756f62 PA |
598 | static const char *const explicit_options[] = |
599 | { | |
600 | "-source", | |
601 | "-function", | |
602 | "-line", | |
603 | "-label", | |
604 | NULL | |
605 | }; | |
606 | ||
607 | /* The probe modifier options. These can appear before a location in | |
608 | breakpoint commands. */ | |
609 | static const char *const probe_options[] = | |
610 | { | |
611 | "-probe", | |
612 | "-probe-stap", | |
613 | "-probe-dtrace", | |
614 | NULL | |
615 | }; | |
616 | ||
eb3ff9a5 | 617 | /* Returns STRING if not NULL, the empty string otherwise. */ |
c94fdfd0 | 618 | |
eb3ff9a5 PA |
619 | static const char * |
620 | string_or_empty (const char *string) | |
621 | { | |
622 | return string != NULL ? string : ""; | |
c94fdfd0 EZ |
623 | } |
624 | ||
87f0e720 KS |
625 | /* A helper function to collect explicit location matches for the given |
626 | LOCATION, which is attempting to match on WORD. */ | |
627 | ||
eb3ff9a5 PA |
628 | static void |
629 | collect_explicit_location_matches (completion_tracker &tracker, | |
630 | struct event_location *location, | |
87f0e720 | 631 | enum explicit_location_match_type what, |
c6756f62 PA |
632 | const char *word, |
633 | const struct language_defn *language) | |
87f0e720 | 634 | { |
67994074 KS |
635 | const struct explicit_location *explicit_loc |
636 | = get_explicit_location (location); | |
87f0e720 | 637 | |
c6756f62 PA |
638 | /* Note, in the various MATCH_* below, we complete on |
639 | explicit_loc->foo instead of WORD, because only the former will | |
640 | have already skipped past any quote char. */ | |
87f0e720 KS |
641 | switch (what) |
642 | { | |
643 | case MATCH_SOURCE: | |
644 | { | |
eb3ff9a5 PA |
645 | const char *source = string_or_empty (explicit_loc->source_filename); |
646 | completion_list matches | |
c6756f62 | 647 | = make_source_files_completion_list (source, source); |
eb3ff9a5 | 648 | tracker.add_completions (std::move (matches)); |
87f0e720 KS |
649 | } |
650 | break; | |
651 | ||
652 | case MATCH_FUNCTION: | |
653 | { | |
eb3ff9a5 | 654 | const char *function = string_or_empty (explicit_loc->function_name); |
c6756f62 PA |
655 | linespec_complete_function (tracker, function, |
656 | explicit_loc->source_filename); | |
87f0e720 KS |
657 | } |
658 | break; | |
659 | ||
c6756f62 PA |
660 | case MATCH_LINE: |
661 | /* Nothing to offer. */ | |
662 | break; | |
663 | ||
87f0e720 | 664 | case MATCH_LABEL: |
a2459270 PA |
665 | { |
666 | const char *label = string_or_empty (explicit_loc->label_name); | |
667 | linespec_complete_label (tracker, language, | |
668 | explicit_loc->source_filename, | |
669 | explicit_loc->function_name, | |
670 | label); | |
671 | } | |
87f0e720 KS |
672 | break; |
673 | ||
674 | default: | |
675 | gdb_assert_not_reached ("unhandled explicit_location_match_type"); | |
676 | } | |
c6756f62 PA |
677 | |
678 | if (tracker.completes_to_completion_word (word)) | |
679 | { | |
680 | tracker.discard_completions (); | |
681 | tracker.advance_custom_word_point_by (strlen (word)); | |
682 | complete_on_enum (tracker, explicit_options, "", ""); | |
683 | complete_on_enum (tracker, linespec_keywords, "", ""); | |
684 | } | |
685 | else if (!tracker.have_completions ()) | |
686 | { | |
687 | /* Maybe we have an unterminated linespec keyword at the tail of | |
688 | the string. Try completing on that. */ | |
689 | size_t wordlen = strlen (word); | |
690 | const char *keyword = word + wordlen; | |
691 | ||
692 | if (wordlen > 0 && keyword[-1] != ' ') | |
693 | { | |
694 | while (keyword > word && *keyword != ' ') | |
695 | keyword--; | |
696 | /* Don't complete on keywords if we'd be completing on the | |
697 | whole explicit linespec option. E.g., "b -function | |
698 | thr<tab>" should not complete to the "thread" | |
699 | keyword. */ | |
700 | if (keyword != word) | |
701 | { | |
f1735a53 | 702 | keyword = skip_spaces (keyword); |
c6756f62 PA |
703 | |
704 | tracker.advance_custom_word_point_by (keyword - word); | |
705 | complete_on_enum (tracker, linespec_keywords, keyword, keyword); | |
706 | } | |
707 | } | |
708 | else if (wordlen > 0 && keyword[-1] == ' ') | |
709 | { | |
710 | /* Assume that we're maybe past the explicit location | |
711 | argument, and we didn't manage to find any match because | |
712 | the user wants to create a pending breakpoint. Offer the | |
713 | keyword and explicit location options as possible | |
714 | completions. */ | |
715 | tracker.advance_custom_word_point_by (keyword - word); | |
716 | complete_on_enum (tracker, linespec_keywords, keyword, keyword); | |
717 | complete_on_enum (tracker, explicit_options, keyword, keyword); | |
718 | } | |
719 | } | |
87f0e720 KS |
720 | } |
721 | ||
c6756f62 PA |
722 | /* If the next word in *TEXT_P is any of the keywords in KEYWORDS, |
723 | then advance both TEXT_P and the word point in the tracker past the | |
724 | keyword and return the (0-based) index in the KEYWORDS array that | |
725 | matched. Otherwise, return -1. */ | |
87f0e720 | 726 | |
c6756f62 PA |
727 | static int |
728 | skip_keyword (completion_tracker &tracker, | |
729 | const char * const *keywords, const char **text_p) | |
87f0e720 | 730 | { |
c6756f62 | 731 | const char *text = *text_p; |
f1735a53 | 732 | const char *after = skip_to_space (text); |
c6756f62 | 733 | size_t len = after - text; |
87f0e720 | 734 | |
c6756f62 PA |
735 | if (text[len] != ' ') |
736 | return -1; | |
737 | ||
738 | int found = -1; | |
739 | for (int i = 0; keywords[i] != NULL; i++) | |
740 | { | |
741 | if (strncmp (keywords[i], text, len) == 0) | |
742 | { | |
743 | if (found == -1) | |
744 | found = i; | |
745 | else | |
746 | return -1; | |
747 | } | |
748 | } | |
749 | ||
750 | if (found != -1) | |
751 | { | |
752 | tracker.advance_custom_word_point_by (len + 1); | |
753 | text += len + 1; | |
754 | *text_p = text; | |
755 | return found; | |
756 | } | |
757 | ||
758 | return -1; | |
87f0e720 KS |
759 | } |
760 | ||
761 | /* A completer function for explicit locations. This function | |
c6756f62 PA |
762 | completes both options ("-source", "-line", etc) and values. If |
763 | completing a quoted string, then QUOTED_ARG_START and | |
764 | QUOTED_ARG_END point to the quote characters. LANGUAGE is the | |
765 | current language. */ | |
87f0e720 | 766 | |
eb3ff9a5 PA |
767 | static void |
768 | complete_explicit_location (completion_tracker &tracker, | |
769 | struct event_location *location, | |
c6756f62 PA |
770 | const char *text, |
771 | const language_defn *language, | |
772 | const char *quoted_arg_start, | |
773 | const char *quoted_arg_end) | |
87f0e720 | 774 | { |
c6756f62 PA |
775 | if (*text != '-') |
776 | return; | |
87f0e720 | 777 | |
c6756f62 | 778 | int keyword = skip_keyword (tracker, explicit_options, &text); |
87f0e720 | 779 | |
c6756f62 PA |
780 | if (keyword == -1) |
781 | complete_on_enum (tracker, explicit_options, text, text); | |
782 | else | |
87f0e720 | 783 | { |
c6756f62 PA |
784 | /* Completing on value. */ |
785 | enum explicit_location_match_type what | |
786 | = (explicit_location_match_type) keyword; | |
787 | ||
788 | if (quoted_arg_start != NULL && quoted_arg_end != NULL) | |
87f0e720 | 789 | { |
c6756f62 PA |
790 | if (quoted_arg_end[1] == '\0') |
791 | { | |
792 | /* If completing a quoted string with the cursor right | |
793 | at the terminating quote char, complete the | |
794 | completion word without interpretation, so that | |
795 | readline advances the cursor one whitespace past the | |
796 | quote, even if there's no match. This makes these | |
797 | cases behave the same: | |
798 | ||
799 | before: "b -function function()" | |
800 | after: "b -function function() " | |
801 | ||
802 | before: "b -function 'function()'" | |
803 | after: "b -function 'function()' " | |
804 | ||
805 | and trusts the user in this case: | |
806 | ||
807 | before: "b -function 'not_loaded_function_yet()'" | |
808 | after: "b -function 'not_loaded_function_yet()' " | |
809 | */ | |
810 | gdb::unique_xmalloc_ptr<char> text_copy | |
811 | (xstrdup (text)); | |
812 | tracker.add_completion (std::move (text_copy)); | |
813 | } | |
814 | else if (quoted_arg_end[1] == ' ') | |
815 | { | |
816 | /* We're maybe past the explicit location argument. | |
817 | Skip the argument without interpretion, assuming the | |
818 | user may want to create pending breakpoint. Offer | |
819 | the keyword and explicit location options as possible | |
820 | completions. */ | |
821 | tracker.advance_custom_word_point_by (strlen (text)); | |
822 | complete_on_enum (tracker, linespec_keywords, "", ""); | |
823 | complete_on_enum (tracker, explicit_options, "", ""); | |
824 | } | |
825 | return; | |
826 | } | |
827 | ||
828 | /* Now gather matches */ | |
829 | collect_explicit_location_matches (tracker, location, what, text, | |
830 | language); | |
831 | } | |
832 | } | |
87f0e720 | 833 | |
c6756f62 | 834 | /* A completer for locations. */ |
87f0e720 | 835 | |
c6756f62 PA |
836 | void |
837 | location_completer (struct cmd_list_element *ignore, | |
838 | completion_tracker &tracker, | |
c45ec17c | 839 | const char *text, const char * /* word */) |
c6756f62 PA |
840 | { |
841 | int found_probe_option = -1; | |
842 | ||
843 | /* If we have a probe modifier, skip it. This can only appear as | |
844 | first argument. Until we have a specific completer for probes, | |
845 | falling back to the linespec completer for the remainder of the | |
846 | line is better than nothing. */ | |
847 | if (text[0] == '-' && text[1] == 'p') | |
848 | found_probe_option = skip_keyword (tracker, probe_options, &text); | |
849 | ||
850 | const char *option_text = text; | |
851 | int saved_word_point = tracker.custom_word_point (); | |
852 | ||
853 | const char *copy = text; | |
854 | ||
855 | explicit_completion_info completion_info; | |
856 | event_location_up location | |
857 | = string_to_explicit_location (©, current_language, | |
858 | &completion_info); | |
859 | if (completion_info.quoted_arg_start != NULL | |
860 | && completion_info.quoted_arg_end == NULL) | |
861 | { | |
862 | /* Found an unbalanced quote. */ | |
863 | tracker.set_quote_char (*completion_info.quoted_arg_start); | |
864 | tracker.advance_custom_word_point_by (1); | |
87f0e720 | 865 | } |
c6756f62 PA |
866 | |
867 | if (location != NULL) | |
87f0e720 | 868 | { |
c6756f62 | 869 | if (*copy != '\0') |
87f0e720 | 870 | { |
c6756f62 PA |
871 | tracker.advance_custom_word_point_by (copy - text); |
872 | text = copy; | |
873 | ||
874 | /* We found a terminator at the tail end of the string, | |
875 | which means we're past the explicit location options. We | |
876 | may have a keyword to complete on. If we have a whole | |
877 | keyword, then complete whatever comes after as an | |
878 | expression. This is mainly for the "if" keyword. If the | |
879 | "thread" and "task" keywords gain their own completers, | |
880 | they should be used here. */ | |
881 | int keyword = skip_keyword (tracker, linespec_keywords, &text); | |
882 | ||
883 | if (keyword == -1) | |
884 | { | |
885 | complete_on_enum (tracker, linespec_keywords, text, text); | |
886 | } | |
887 | else | |
888 | { | |
889 | const char *word | |
890 | = advance_to_expression_complete_word_point (tracker, text); | |
891 | complete_expression (tracker, text, word); | |
892 | } | |
87f0e720 | 893 | } |
c6756f62 | 894 | else |
87f0e720 | 895 | { |
c6756f62 PA |
896 | tracker.advance_custom_word_point_by (completion_info.last_option |
897 | - text); | |
898 | text = completion_info.last_option; | |
899 | ||
900 | complete_explicit_location (tracker, location.get (), text, | |
901 | current_language, | |
902 | completion_info.quoted_arg_start, | |
903 | completion_info.quoted_arg_end); | |
904 | ||
87f0e720 | 905 | } |
c6756f62 PA |
906 | } |
907 | else | |
908 | { | |
909 | /* This is an address or linespec location. */ | |
c45ec17c | 910 | complete_address_and_linespec_locations (tracker, text); |
c6756f62 | 911 | } |
87f0e720 | 912 | |
c6756f62 | 913 | /* Add matches for option names, if either: |
87f0e720 | 914 | |
c6756f62 PA |
915 | - Some completer above found some matches, but the word point did |
916 | not advance (e.g., "b <tab>" finds all functions, or "b -<tab>" | |
917 | matches all objc selectors), or; | |
918 | ||
919 | - Some completer above advanced the word point, but found no | |
920 | matches. | |
921 | */ | |
922 | if ((text[0] == '-' || text[0] == '\0') | |
923 | && (!tracker.have_completions () | |
924 | || tracker.custom_word_point () == saved_word_point)) | |
925 | { | |
926 | tracker.set_custom_word_point (saved_word_point); | |
927 | text = option_text; | |
928 | ||
929 | if (found_probe_option == -1) | |
930 | complete_on_enum (tracker, probe_options, text, text); | |
931 | complete_on_enum (tracker, explicit_options, text, text); | |
87f0e720 | 932 | } |
87f0e720 KS |
933 | } |
934 | ||
c6756f62 PA |
935 | /* The corresponding completer_handle_brkchars |
936 | implementation. */ | |
87f0e720 | 937 | |
c6756f62 PA |
938 | static void |
939 | location_completer_handle_brkchars (struct cmd_list_element *ignore, | |
940 | completion_tracker &tracker, | |
941 | const char *text, | |
942 | const char *word_ignored) | |
87f0e720 | 943 | { |
c6756f62 | 944 | tracker.set_use_custom_word_point (true); |
87f0e720 | 945 | |
c6756f62 | 946 | location_completer (ignore, tracker, text, NULL); |
87f0e720 KS |
947 | } |
948 | ||
1c71341a | 949 | /* Helper for expression_completer which recursively adds field and |
eb3ff9a5 PA |
950 | method names from TYPE, a struct or union type, to the OUTPUT |
951 | list. */ | |
952 | ||
65d12d83 | 953 | static void |
eb3ff9a5 | 954 | add_struct_fields (struct type *type, completion_list &output, |
65d12d83 TT |
955 | char *fieldname, int namelen) |
956 | { | |
957 | int i; | |
b32d97f3 | 958 | int computed_type_name = 0; |
0d5cff50 | 959 | const char *type_name = NULL; |
65d12d83 | 960 | |
f168693b | 961 | type = check_typedef (type); |
65d12d83 TT |
962 | for (i = 0; i < TYPE_NFIELDS (type); ++i) |
963 | { | |
964 | if (i < TYPE_N_BASECLASSES (type)) | |
49c4e619 | 965 | add_struct_fields (TYPE_BASECLASS (type, i), |
aff410f1 | 966 | output, fieldname, namelen); |
9ae8282d | 967 | else if (TYPE_FIELD_NAME (type, i)) |
65d12d83 | 968 | { |
9ae8282d TT |
969 | if (TYPE_FIELD_NAME (type, i)[0] != '\0') |
970 | { | |
aff410f1 MS |
971 | if (! strncmp (TYPE_FIELD_NAME (type, i), |
972 | fieldname, namelen)) | |
eb3ff9a5 | 973 | output.emplace_back (xstrdup (TYPE_FIELD_NAME (type, i))); |
9ae8282d TT |
974 | } |
975 | else if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_UNION) | |
976 | { | |
977 | /* Recurse into anonymous unions. */ | |
49c4e619 | 978 | add_struct_fields (TYPE_FIELD_TYPE (type, i), |
aff410f1 | 979 | output, fieldname, namelen); |
9ae8282d | 980 | } |
65d12d83 TT |
981 | } |
982 | } | |
1c71341a TT |
983 | |
984 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i) | |
985 | { | |
0d5cff50 | 986 | const char *name = TYPE_FN_FIELDLIST_NAME (type, i); |
c5504eaf | 987 | |
1c71341a TT |
988 | if (name && ! strncmp (name, fieldname, namelen)) |
989 | { | |
b32d97f3 TT |
990 | if (!computed_type_name) |
991 | { | |
992 | type_name = type_name_no_tag (type); | |
993 | computed_type_name = 1; | |
994 | } | |
1c71341a | 995 | /* Omit constructors from the completion list. */ |
907af001 | 996 | if (!type_name || strcmp (type_name, name)) |
eb3ff9a5 | 997 | output.emplace_back (xstrdup (name)); |
1c71341a TT |
998 | } |
999 | } | |
65d12d83 TT |
1000 | } |
1001 | ||
c45ec17c | 1002 | /* See completer.h. */ |
eb3ff9a5 | 1003 | |
c45ec17c | 1004 | void |
eb3ff9a5 PA |
1005 | complete_expression (completion_tracker &tracker, |
1006 | const char *text, const char *word) | |
65d12d83 | 1007 | { |
c92817ce | 1008 | struct type *type = NULL; |
6f937416 | 1009 | char *fieldname; |
2f68a895 | 1010 | enum type_code code = TYPE_CODE_UNDEF; |
65d12d83 TT |
1011 | |
1012 | /* Perform a tentative parse of the expression, to see whether a | |
1013 | field completion is required. */ | |
1014 | fieldname = NULL; | |
492d29ea | 1015 | TRY |
c92817ce | 1016 | { |
2f68a895 | 1017 | type = parse_expression_for_completion (text, &fieldname, &code); |
c92817ce | 1018 | } |
492d29ea PA |
1019 | CATCH (except, RETURN_MASK_ERROR) |
1020 | { | |
eb3ff9a5 | 1021 | return; |
492d29ea PA |
1022 | } |
1023 | END_CATCH | |
1024 | ||
65d12d83 TT |
1025 | if (fieldname && type) |
1026 | { | |
1027 | for (;;) | |
1028 | { | |
f168693b | 1029 | type = check_typedef (type); |
aa006118 | 1030 | if (TYPE_CODE (type) != TYPE_CODE_PTR && !TYPE_IS_REFERENCE (type)) |
65d12d83 TT |
1031 | break; |
1032 | type = TYPE_TARGET_TYPE (type); | |
1033 | } | |
1034 | ||
1035 | if (TYPE_CODE (type) == TYPE_CODE_UNION | |
1036 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
1037 | { | |
65d12d83 | 1038 | int flen = strlen (fieldname); |
eb3ff9a5 | 1039 | completion_list result; |
65d12d83 | 1040 | |
eb3ff9a5 | 1041 | add_struct_fields (type, result, fieldname, flen); |
a0b7aece | 1042 | xfree (fieldname); |
eb3ff9a5 PA |
1043 | tracker.add_completions (std::move (result)); |
1044 | return; | |
65d12d83 TT |
1045 | } |
1046 | } | |
2f68a895 TT |
1047 | else if (fieldname && code != TYPE_CODE_UNDEF) |
1048 | { | |
1049 | VEC (char_ptr) *result; | |
1050 | struct cleanup *cleanup = make_cleanup (xfree, fieldname); | |
1051 | ||
eb3ff9a5 PA |
1052 | collect_symbol_completion_matches_type (tracker, fieldname, fieldname, |
1053 | code); | |
2f68a895 | 1054 | do_cleanups (cleanup); |
eb3ff9a5 | 1055 | return; |
2f68a895 | 1056 | } |
a0b7aece | 1057 | xfree (fieldname); |
65d12d83 | 1058 | |
eb3ff9a5 PA |
1059 | complete_files_symbols (tracker, text, word); |
1060 | } | |
1061 | ||
1062 | /* Complete on expressions. Often this means completing on symbol | |
1063 | names, but some language parsers also have support for completing | |
1064 | field names. */ | |
1065 | ||
1066 | void | |
1067 | expression_completer (struct cmd_list_element *ignore, | |
1068 | completion_tracker &tracker, | |
1069 | const char *text, const char *word) | |
1070 | { | |
1071 | complete_expression (tracker, text, word); | |
65d12d83 TT |
1072 | } |
1073 | ||
7d793aa9 SDJ |
1074 | /* See definition in completer.h. */ |
1075 | ||
67cb5b2d PA |
1076 | void |
1077 | set_rl_completer_word_break_characters (const char *break_chars) | |
1078 | { | |
1079 | rl_completer_word_break_characters = (char *) break_chars; | |
1080 | } | |
1081 | ||
1082 | /* See definition in completer.h. */ | |
1083 | ||
7d793aa9 SDJ |
1084 | void |
1085 | set_gdb_completion_word_break_characters (completer_ftype *fn) | |
1086 | { | |
67cb5b2d PA |
1087 | const char *break_chars; |
1088 | ||
7d793aa9 SDJ |
1089 | /* So far we are only interested in differentiating filename |
1090 | completers from everything else. */ | |
1091 | if (fn == filename_completer) | |
67cb5b2d | 1092 | break_chars = gdb_completer_file_name_break_characters; |
7d793aa9 | 1093 | else |
67cb5b2d PA |
1094 | break_chars = gdb_completer_command_word_break_characters; |
1095 | ||
1096 | set_rl_completer_word_break_characters (break_chars); | |
7d793aa9 SDJ |
1097 | } |
1098 | ||
78b13106 PA |
1099 | /* Complete on symbols. */ |
1100 | ||
eb3ff9a5 | 1101 | void |
78b13106 | 1102 | symbol_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1103 | completion_tracker &tracker, |
78b13106 PA |
1104 | const char *text, const char *word) |
1105 | { | |
c6756f62 PA |
1106 | collect_symbol_completion_matches (tracker, complete_symbol_mode::EXPRESSION, |
1107 | text, word); | |
78b13106 PA |
1108 | } |
1109 | ||
aff410f1 MS |
1110 | /* Here are some useful test cases for completion. FIXME: These |
1111 | should be put in the test suite. They should be tested with both | |
1112 | M-? and TAB. | |
c5f0f3d0 FN |
1113 | |
1114 | "show output-" "radix" | |
1115 | "show output" "-radix" | |
1116 | "p" ambiguous (commands starting with p--path, print, printf, etc.) | |
1117 | "p " ambiguous (all symbols) | |
1118 | "info t foo" no completions | |
1119 | "info t " no completions | |
1120 | "info t" ambiguous ("info target", "info terminal", etc.) | |
1121 | "info ajksdlfk" no completions | |
1122 | "info ajksdlfk " no completions | |
1123 | "info" " " | |
1124 | "info " ambiguous (all info commands) | |
1125 | "p \"a" no completions (string constant) | |
1126 | "p 'a" ambiguous (all symbols starting with a) | |
1127 | "p b-a" ambiguous (all symbols starting with a) | |
1128 | "p b-" ambiguous (all symbols) | |
1129 | "file Make" "file" (word break hard to screw up here) | |
1130 | "file ../gdb.stabs/we" "ird" (needs to not break word at slash) | |
1131 | */ | |
1132 | ||
eb3ff9a5 | 1133 | enum complete_line_internal_reason |
67c296a2 | 1134 | { |
eb3ff9a5 | 1135 | /* Preliminary phase, called by gdb_completion_word_break_characters |
c6756f62 PA |
1136 | function, is used to either: |
1137 | ||
1138 | #1 - Determine the set of chars that are word delimiters | |
1139 | depending on the current command in line_buffer. | |
1140 | ||
1141 | #2 - Manually advance RL_POINT to the "word break" point instead | |
1142 | of letting readline do it (based on too-simple character | |
1143 | matching). | |
1144 | ||
1145 | Simpler completers that just pass a brkchars array to readline | |
1146 | (#1 above) must defer generating the completions to the main | |
1147 | phase (below). No completion list should be generated in this | |
1148 | phase. | |
1149 | ||
1150 | OTOH, completers that manually advance the word point(#2 above) | |
1151 | must set "use_custom_word_point" in the tracker and generate | |
1152 | their completion in this phase. Note that this is the convenient | |
1153 | thing to do since they'll be parsing the input line anyway. */ | |
67c296a2 | 1154 | handle_brkchars, |
eb3ff9a5 PA |
1155 | |
1156 | /* Main phase, called by complete_line function, is used to get the | |
1157 | list of possible completions. */ | |
67c296a2 | 1158 | handle_completions, |
eb3ff9a5 PA |
1159 | |
1160 | /* Special case when completing a 'help' command. In this case, | |
1161 | once sub-command completions are exhausted, we simply return | |
1162 | NULL. */ | |
1163 | handle_help, | |
1164 | }; | |
67c296a2 | 1165 | |
6e1dbf8c PA |
1166 | /* Helper for complete_line_internal to simplify it. */ |
1167 | ||
eb3ff9a5 PA |
1168 | static void |
1169 | complete_line_internal_normal_command (completion_tracker &tracker, | |
1170 | const char *command, const char *word, | |
6e1dbf8c PA |
1171 | const char *cmd_args, |
1172 | complete_line_internal_reason reason, | |
1173 | struct cmd_list_element *c) | |
1174 | { | |
1175 | const char *p = cmd_args; | |
1176 | ||
1177 | if (c->completer == filename_completer) | |
1178 | { | |
1179 | /* Many commands which want to complete on file names accept | |
1180 | several file names, as in "run foo bar >>baz". So we don't | |
1181 | want to complete the entire text after the command, just the | |
1182 | last word. To this end, we need to find the beginning of the | |
1183 | file name by starting at `word' and going backwards. */ | |
1184 | for (p = word; | |
1185 | p > command | |
1186 | && strchr (gdb_completer_file_name_break_characters, | |
1187 | p[-1]) == NULL; | |
1188 | p--) | |
1189 | ; | |
1190 | } | |
1191 | ||
1192 | if (reason == handle_brkchars) | |
1193 | { | |
1194 | completer_handle_brkchars_ftype *brkchars_fn; | |
1195 | ||
1196 | if (c->completer_handle_brkchars != NULL) | |
1197 | brkchars_fn = c->completer_handle_brkchars; | |
1198 | else | |
1199 | { | |
1200 | brkchars_fn | |
1201 | = (completer_handle_brkchars_func_for_completer | |
1202 | (c->completer)); | |
1203 | } | |
1204 | ||
eb3ff9a5 | 1205 | brkchars_fn (c, tracker, p, word); |
6e1dbf8c PA |
1206 | } |
1207 | ||
1208 | if (reason != handle_brkchars && c->completer != NULL) | |
eb3ff9a5 | 1209 | (*c->completer) (c, tracker, p, word); |
6e1dbf8c | 1210 | } |
67c296a2 PM |
1211 | |
1212 | /* Internal function used to handle completions. | |
1213 | ||
c5f0f3d0 FN |
1214 | |
1215 | TEXT is the caller's idea of the "word" we are looking at. | |
1216 | ||
aff410f1 MS |
1217 | LINE_BUFFER is available to be looked at; it contains the entire |
1218 | text of the line. POINT is the offset in that line of the cursor. | |
1219 | You should pretend that the line ends at POINT. | |
67c296a2 | 1220 | |
eb3ff9a5 | 1221 | See complete_line_internal_reason for description of REASON. */ |
14032a66 | 1222 | |
eb3ff9a5 PA |
1223 | static void |
1224 | complete_line_internal_1 (completion_tracker &tracker, | |
1225 | const char *text, | |
1226 | const char *line_buffer, int point, | |
1227 | complete_line_internal_reason reason) | |
c5f0f3d0 | 1228 | { |
6f937416 PA |
1229 | char *tmp_command; |
1230 | const char *p; | |
ace21957 | 1231 | int ignore_help_classes; |
c5f0f3d0 | 1232 | /* Pointer within tmp_command which corresponds to text. */ |
eb3ff9a5 | 1233 | const char *word; |
c5f0f3d0 FN |
1234 | struct cmd_list_element *c, *result_list; |
1235 | ||
aff410f1 MS |
1236 | /* Choose the default set of word break characters to break |
1237 | completions. If we later find out that we are doing completions | |
1238 | on command strings (as opposed to strings supplied by the | |
1239 | individual command completer functions, which can be any string) | |
1240 | then we will switch to the special word break set for command | |
1241 | strings, which leaves out the '-' character used in some | |
1242 | commands. */ | |
67cb5b2d PA |
1243 | set_rl_completer_word_break_characters |
1244 | (current_language->la_word_break_characters()); | |
c5f0f3d0 | 1245 | |
aff410f1 MS |
1246 | /* Decide whether to complete on a list of gdb commands or on |
1247 | symbols. */ | |
83d31a92 TT |
1248 | tmp_command = (char *) alloca (point + 1); |
1249 | p = tmp_command; | |
c5f0f3d0 | 1250 | |
ace21957 MF |
1251 | /* The help command should complete help aliases. */ |
1252 | ignore_help_classes = reason != handle_help; | |
1253 | ||
83d31a92 TT |
1254 | strncpy (tmp_command, line_buffer, point); |
1255 | tmp_command[point] = '\0'; | |
eb3ff9a5 PA |
1256 | if (reason == handle_brkchars) |
1257 | { | |
1258 | gdb_assert (text == NULL); | |
1259 | word = NULL; | |
1260 | } | |
1261 | else | |
1262 | { | |
1263 | /* Since text always contains some number of characters leading up | |
1264 | to point, we can find the equivalent position in tmp_command | |
1265 | by subtracting that many characters from the end of tmp_command. */ | |
1266 | word = tmp_command + point - strlen (text); | |
1267 | } | |
c5f0f3d0 | 1268 | |
83d31a92 TT |
1269 | if (point == 0) |
1270 | { | |
1271 | /* An empty line we want to consider ambiguous; that is, it | |
1272 | could be any command. */ | |
1427fe5e | 1273 | c = CMD_LIST_AMBIGUOUS; |
83d31a92 TT |
1274 | result_list = 0; |
1275 | } | |
1276 | else | |
1277 | { | |
ace21957 | 1278 | c = lookup_cmd_1 (&p, cmdlist, &result_list, ignore_help_classes); |
83d31a92 | 1279 | } |
c5f0f3d0 | 1280 | |
83d31a92 TT |
1281 | /* Move p up to the next interesting thing. */ |
1282 | while (*p == ' ' || *p == '\t') | |
1283 | { | |
1284 | p++; | |
1285 | } | |
c5f0f3d0 | 1286 | |
c6756f62 PA |
1287 | tracker.advance_custom_word_point_by (p - tmp_command); |
1288 | ||
83d31a92 TT |
1289 | if (!c) |
1290 | { | |
1291 | /* It is an unrecognized command. So there are no | |
1292 | possible completions. */ | |
83d31a92 | 1293 | } |
1427fe5e | 1294 | else if (c == CMD_LIST_AMBIGUOUS) |
83d31a92 | 1295 | { |
6f937416 | 1296 | const char *q; |
83d31a92 TT |
1297 | |
1298 | /* lookup_cmd_1 advances p up to the first ambiguous thing, but | |
1299 | doesn't advance over that thing itself. Do so now. */ | |
1300 | q = p; | |
1301 | while (*q && (isalnum (*q) || *q == '-' || *q == '_')) | |
1302 | ++q; | |
1303 | if (q != tmp_command + point) | |
c5f0f3d0 | 1304 | { |
83d31a92 TT |
1305 | /* There is something beyond the ambiguous |
1306 | command, so there are no possible completions. For | |
1307 | example, "info t " or "info t foo" does not complete | |
1308 | to anything, because "info t" can be "info target" or | |
1309 | "info terminal". */ | |
c5f0f3d0 | 1310 | } |
83d31a92 | 1311 | else |
c5f0f3d0 | 1312 | { |
83d31a92 TT |
1313 | /* We're trying to complete on the command which was ambiguous. |
1314 | This we can deal with. */ | |
1315 | if (result_list) | |
c5f0f3d0 | 1316 | { |
67c296a2 | 1317 | if (reason != handle_brkchars) |
eb3ff9a5 PA |
1318 | complete_on_cmdlist (*result_list->prefixlist, tracker, p, |
1319 | word, ignore_help_classes); | |
c5f0f3d0 FN |
1320 | } |
1321 | else | |
1322 | { | |
67c296a2 | 1323 | if (reason != handle_brkchars) |
eb3ff9a5 PA |
1324 | complete_on_cmdlist (cmdlist, tracker, p, word, |
1325 | ignore_help_classes); | |
c5f0f3d0 | 1326 | } |
489f0516 | 1327 | /* Ensure that readline does the right thing with respect to |
83d31a92 | 1328 | inserting quotes. */ |
67cb5b2d PA |
1329 | set_rl_completer_word_break_characters |
1330 | (gdb_completer_command_word_break_characters); | |
c5f0f3d0 | 1331 | } |
83d31a92 TT |
1332 | } |
1333 | else | |
1334 | { | |
1335 | /* We've recognized a full command. */ | |
1336 | ||
1337 | if (p == tmp_command + point) | |
c5f0f3d0 | 1338 | { |
aff410f1 MS |
1339 | /* There is no non-whitespace in the line beyond the |
1340 | command. */ | |
c5f0f3d0 | 1341 | |
83d31a92 | 1342 | if (p[-1] == ' ' || p[-1] == '\t') |
c5f0f3d0 | 1343 | { |
aff410f1 MS |
1344 | /* The command is followed by whitespace; we need to |
1345 | complete on whatever comes after command. */ | |
83d31a92 | 1346 | if (c->prefixlist) |
c5f0f3d0 | 1347 | { |
83d31a92 TT |
1348 | /* It is a prefix command; what comes after it is |
1349 | a subcommand (e.g. "info "). */ | |
67c296a2 | 1350 | if (reason != handle_brkchars) |
eb3ff9a5 PA |
1351 | complete_on_cmdlist (*c->prefixlist, tracker, p, word, |
1352 | ignore_help_classes); | |
c5f0f3d0 | 1353 | |
489f0516 | 1354 | /* Ensure that readline does the right thing |
9c3f90bd | 1355 | with respect to inserting quotes. */ |
67cb5b2d PA |
1356 | set_rl_completer_word_break_characters |
1357 | (gdb_completer_command_word_break_characters); | |
c5f0f3d0 | 1358 | } |
67c296a2 | 1359 | else if (reason == handle_help) |
eb3ff9a5 | 1360 | ; |
c5f0f3d0 FN |
1361 | else if (c->enums) |
1362 | { | |
67c296a2 | 1363 | if (reason != handle_brkchars) |
eb3ff9a5 | 1364 | complete_on_enum (tracker, c->enums, p, word); |
67cb5b2d PA |
1365 | set_rl_completer_word_break_characters |
1366 | (gdb_completer_command_word_break_characters); | |
c5f0f3d0 FN |
1367 | } |
1368 | else | |
1369 | { | |
83d31a92 TT |
1370 | /* It is a normal command; what comes after it is |
1371 | completed by the command's completer function. */ | |
eb3ff9a5 PA |
1372 | complete_line_internal_normal_command (tracker, |
1373 | tmp_command, word, p, | |
1374 | reason, c); | |
c5f0f3d0 FN |
1375 | } |
1376 | } | |
83d31a92 TT |
1377 | else |
1378 | { | |
1379 | /* The command is not followed by whitespace; we need to | |
aff410f1 | 1380 | complete on the command itself, e.g. "p" which is a |
83d31a92 TT |
1381 | command itself but also can complete to "print", "ptype" |
1382 | etc. */ | |
6f937416 | 1383 | const char *q; |
83d31a92 TT |
1384 | |
1385 | /* Find the command we are completing on. */ | |
1386 | q = p; | |
1387 | while (q > tmp_command) | |
1388 | { | |
1389 | if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_') | |
1390 | --q; | |
1391 | else | |
1392 | break; | |
1393 | } | |
1394 | ||
67c296a2 | 1395 | if (reason != handle_brkchars) |
eb3ff9a5 PA |
1396 | complete_on_cmdlist (result_list, tracker, q, word, |
1397 | ignore_help_classes); | |
83d31a92 | 1398 | |
489f0516 | 1399 | /* Ensure that readline does the right thing |
9c3f90bd | 1400 | with respect to inserting quotes. */ |
67cb5b2d PA |
1401 | set_rl_completer_word_break_characters |
1402 | (gdb_completer_command_word_break_characters); | |
83d31a92 TT |
1403 | } |
1404 | } | |
67c296a2 | 1405 | else if (reason == handle_help) |
eb3ff9a5 | 1406 | ; |
83d31a92 TT |
1407 | else |
1408 | { | |
1409 | /* There is non-whitespace beyond the command. */ | |
1410 | ||
1411 | if (c->prefixlist && !c->allow_unknown) | |
1412 | { | |
1413 | /* It is an unrecognized subcommand of a prefix command, | |
1414 | e.g. "info adsfkdj". */ | |
83d31a92 TT |
1415 | } |
1416 | else if (c->enums) | |
1417 | { | |
67c296a2 | 1418 | if (reason != handle_brkchars) |
eb3ff9a5 | 1419 | complete_on_enum (tracker, c->enums, p, word); |
83d31a92 TT |
1420 | } |
1421 | else | |
1422 | { | |
1423 | /* It is a normal command. */ | |
eb3ff9a5 PA |
1424 | complete_line_internal_normal_command (tracker, |
1425 | tmp_command, word, p, | |
1426 | reason, c); | |
83d31a92 TT |
1427 | } |
1428 | } | |
1429 | } | |
83d31a92 | 1430 | } |
ef0b411a | 1431 | |
eb3ff9a5 PA |
1432 | /* Wrapper around complete_line_internal_1 to handle |
1433 | MAX_COMPLETIONS_REACHED_ERROR. */ | |
ef0b411a | 1434 | |
eb3ff9a5 PA |
1435 | static void |
1436 | complete_line_internal (completion_tracker &tracker, | |
1437 | const char *text, | |
1438 | const char *line_buffer, int point, | |
1439 | complete_line_internal_reason reason) | |
1440 | { | |
1441 | TRY | |
1442 | { | |
1443 | complete_line_internal_1 (tracker, text, line_buffer, point, reason); | |
1444 | } | |
1445 | CATCH (except, RETURN_MASK_ERROR) | |
1446 | { | |
1447 | if (except.error != MAX_COMPLETIONS_REACHED_ERROR) | |
1448 | throw_exception (except); | |
1449 | } | |
a87c1427 | 1450 | END_CATCH |
eb3ff9a5 | 1451 | } |
ef0b411a GB |
1452 | |
1453 | /* See completer.h. */ | |
1454 | ||
eb3ff9a5 | 1455 | int max_completions = 200; |
ef0b411a | 1456 | |
eb3ff9a5 PA |
1457 | /* Initial size of the table. It automagically grows from here. */ |
1458 | #define INITIAL_COMPLETION_HTAB_SIZE 200 | |
ef0b411a | 1459 | |
eb3ff9a5 | 1460 | /* See completer.h. */ |
ef0b411a | 1461 | |
eb3ff9a5 | 1462 | completion_tracker::completion_tracker () |
ef0b411a | 1463 | { |
eb3ff9a5 PA |
1464 | m_entries_hash = htab_create_alloc (INITIAL_COMPLETION_HTAB_SIZE, |
1465 | htab_hash_string, (htab_eq) streq, | |
1466 | NULL, xcalloc, xfree); | |
ef0b411a GB |
1467 | } |
1468 | ||
1469 | /* See completer.h. */ | |
1470 | ||
c6756f62 PA |
1471 | void |
1472 | completion_tracker::discard_completions () | |
1473 | { | |
1474 | xfree (m_lowest_common_denominator); | |
1475 | m_lowest_common_denominator = NULL; | |
1476 | ||
1477 | m_lowest_common_denominator_unique = false; | |
1478 | ||
1479 | m_entries_vec.clear (); | |
1480 | ||
1481 | htab_delete (m_entries_hash); | |
1482 | m_entries_hash = htab_create_alloc (INITIAL_COMPLETION_HTAB_SIZE, | |
1483 | htab_hash_string, (htab_eq) streq, | |
1484 | NULL, xcalloc, xfree); | |
1485 | } | |
1486 | ||
1487 | /* See completer.h. */ | |
1488 | ||
eb3ff9a5 | 1489 | completion_tracker::~completion_tracker () |
ef0b411a | 1490 | { |
eb3ff9a5 PA |
1491 | xfree (m_lowest_common_denominator); |
1492 | htab_delete (m_entries_hash); | |
ef0b411a GB |
1493 | } |
1494 | ||
1495 | /* See completer.h. */ | |
1496 | ||
eb3ff9a5 PA |
1497 | bool |
1498 | completion_tracker::maybe_add_completion (gdb::unique_xmalloc_ptr<char> name) | |
ef0b411a GB |
1499 | { |
1500 | void **slot; | |
1501 | ||
ef0b411a | 1502 | if (max_completions == 0) |
eb3ff9a5 | 1503 | return false; |
ef0b411a | 1504 | |
eb3ff9a5 PA |
1505 | if (htab_elements (m_entries_hash) >= max_completions) |
1506 | return false; | |
ef0b411a | 1507 | |
eb3ff9a5 PA |
1508 | slot = htab_find_slot (m_entries_hash, name.get (), INSERT); |
1509 | if (*slot == HTAB_EMPTY_ENTRY) | |
1510 | { | |
1511 | const char *match_for_lcd_str = name.get (); | |
ef0b411a | 1512 | |
eb3ff9a5 | 1513 | recompute_lowest_common_denominator (match_for_lcd_str); |
ef0b411a | 1514 | |
eb3ff9a5 PA |
1515 | *slot = name.get (); |
1516 | m_entries_vec.push_back (std::move (name)); | |
1517 | } | |
ef0b411a | 1518 | |
eb3ff9a5 PA |
1519 | return true; |
1520 | } | |
1521 | ||
1522 | /* See completer.h. */ | |
ef0b411a | 1523 | |
eb3ff9a5 PA |
1524 | void |
1525 | completion_tracker::add_completion (gdb::unique_xmalloc_ptr<char> name) | |
1526 | { | |
1527 | if (!maybe_add_completion (std::move (name))) | |
1528 | throw_error (MAX_COMPLETIONS_REACHED_ERROR, _("Max completions reached.")); | |
ef0b411a GB |
1529 | } |
1530 | ||
eb3ff9a5 PA |
1531 | /* See completer.h. */ |
1532 | ||
ef0b411a | 1533 | void |
eb3ff9a5 | 1534 | completion_tracker::add_completions (completion_list &&list) |
ef0b411a | 1535 | { |
eb3ff9a5 PA |
1536 | for (auto &candidate : list) |
1537 | add_completion (std::move (candidate)); | |
ef0b411a GB |
1538 | } |
1539 | ||
eb3ff9a5 PA |
1540 | /* Generate completions all at once. Does nothing if max_completions |
1541 | is 0. If max_completions is non-negative, this will collect at | |
1542 | most max_completions strings. | |
83d31a92 | 1543 | |
67c296a2 PM |
1544 | TEXT is the caller's idea of the "word" we are looking at. |
1545 | ||
aff410f1 MS |
1546 | LINE_BUFFER is available to be looked at; it contains the entire |
1547 | text of the line. | |
67c296a2 PM |
1548 | |
1549 | POINT is the offset in that line of the cursor. You | |
1550 | should pretend that the line ends at POINT. */ | |
14032a66 | 1551 | |
eb3ff9a5 PA |
1552 | void |
1553 | complete_line (completion_tracker &tracker, | |
1554 | const char *text, const char *line_buffer, int point) | |
14032a66 | 1555 | { |
ef0b411a | 1556 | if (max_completions == 0) |
eb3ff9a5 PA |
1557 | return; |
1558 | complete_line_internal (tracker, text, line_buffer, point, | |
1559 | handle_completions); | |
14032a66 TT |
1560 | } |
1561 | ||
1562 | /* Complete on command names. Used by "help". */ | |
6e1dbf8c | 1563 | |
eb3ff9a5 | 1564 | void |
aff410f1 | 1565 | command_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1566 | completion_tracker &tracker, |
6f937416 | 1567 | const char *text, const char *word) |
14032a66 | 1568 | { |
eb3ff9a5 PA |
1569 | complete_line_internal (tracker, word, text, |
1570 | strlen (text), handle_help); | |
67c296a2 PM |
1571 | } |
1572 | ||
6e1dbf8c PA |
1573 | /* The corresponding completer_handle_brkchars implementation. */ |
1574 | ||
1575 | static void | |
1576 | command_completer_handle_brkchars (struct cmd_list_element *ignore, | |
eb3ff9a5 | 1577 | completion_tracker &tracker, |
6e1dbf8c PA |
1578 | const char *text, const char *word) |
1579 | { | |
1580 | set_rl_completer_word_break_characters | |
1581 | (gdb_completer_command_word_break_characters); | |
1582 | } | |
1583 | ||
de0bea00 MF |
1584 | /* Complete on signals. */ |
1585 | ||
eb3ff9a5 | 1586 | void |
de0bea00 | 1587 | signal_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1588 | completion_tracker &tracker, |
6f937416 | 1589 | const char *text, const char *word) |
de0bea00 | 1590 | { |
de0bea00 | 1591 | size_t len = strlen (word); |
570dc176 | 1592 | int signum; |
de0bea00 MF |
1593 | const char *signame; |
1594 | ||
1595 | for (signum = GDB_SIGNAL_FIRST; signum != GDB_SIGNAL_LAST; ++signum) | |
1596 | { | |
1597 | /* Can't handle this, so skip it. */ | |
1598 | if (signum == GDB_SIGNAL_0) | |
1599 | continue; | |
1600 | ||
570dc176 | 1601 | signame = gdb_signal_to_name ((enum gdb_signal) signum); |
de0bea00 MF |
1602 | |
1603 | /* Ignore the unknown signal case. */ | |
1604 | if (!signame || strcmp (signame, "?") == 0) | |
1605 | continue; | |
1606 | ||
1607 | if (strncasecmp (signame, word, len) == 0) | |
eb3ff9a5 PA |
1608 | { |
1609 | gdb::unique_xmalloc_ptr<char> copy (xstrdup (signame)); | |
1610 | tracker.add_completion (std::move (copy)); | |
1611 | } | |
de0bea00 | 1612 | } |
de0bea00 MF |
1613 | } |
1614 | ||
51f0e40d AB |
1615 | /* Bit-flags for selecting what the register and/or register-group |
1616 | completer should complete on. */ | |
71c24708 | 1617 | |
8d297bbf | 1618 | enum reg_completer_target |
51f0e40d AB |
1619 | { |
1620 | complete_register_names = 0x1, | |
1621 | complete_reggroup_names = 0x2 | |
1622 | }; | |
8d297bbf | 1623 | DEF_ENUM_FLAGS_TYPE (enum reg_completer_target, reg_completer_targets); |
51f0e40d AB |
1624 | |
1625 | /* Complete register names and/or reggroup names based on the value passed | |
1626 | in TARGETS. At least one bit in TARGETS must be set. */ | |
1627 | ||
eb3ff9a5 PA |
1628 | static void |
1629 | reg_or_group_completer_1 (completion_tracker &tracker, | |
51f0e40d | 1630 | const char *text, const char *word, |
8d297bbf | 1631 | reg_completer_targets targets) |
71c24708 | 1632 | { |
71c24708 AA |
1633 | size_t len = strlen (word); |
1634 | struct gdbarch *gdbarch; | |
71c24708 | 1635 | const char *name; |
71c24708 | 1636 | |
51f0e40d AB |
1637 | gdb_assert ((targets & (complete_register_names |
1638 | | complete_reggroup_names)) != 0); | |
1639 | gdbarch = get_current_arch (); | |
71c24708 | 1640 | |
51f0e40d | 1641 | if ((targets & complete_register_names) != 0) |
71c24708 | 1642 | { |
51f0e40d AB |
1643 | int i; |
1644 | ||
1645 | for (i = 0; | |
1646 | (name = user_reg_map_regnum_to_name (gdbarch, i)) != NULL; | |
1647 | i++) | |
1648 | { | |
1649 | if (*name != '\0' && strncmp (word, name, len) == 0) | |
eb3ff9a5 PA |
1650 | { |
1651 | gdb::unique_xmalloc_ptr<char> copy (xstrdup (name)); | |
1652 | tracker.add_completion (std::move (copy)); | |
1653 | } | |
51f0e40d | 1654 | } |
71c24708 AA |
1655 | } |
1656 | ||
51f0e40d | 1657 | if ((targets & complete_reggroup_names) != 0) |
71c24708 | 1658 | { |
51f0e40d AB |
1659 | struct reggroup *group; |
1660 | ||
1661 | for (group = reggroup_next (gdbarch, NULL); | |
1662 | group != NULL; | |
1663 | group = reggroup_next (gdbarch, group)) | |
1664 | { | |
1665 | name = reggroup_name (group); | |
1666 | if (strncmp (word, name, len) == 0) | |
eb3ff9a5 PA |
1667 | { |
1668 | gdb::unique_xmalloc_ptr<char> copy (xstrdup (name)); | |
1669 | tracker.add_completion (std::move (copy)); | |
1670 | } | |
51f0e40d | 1671 | } |
71c24708 | 1672 | } |
71c24708 AA |
1673 | } |
1674 | ||
51f0e40d AB |
1675 | /* Perform completion on register and reggroup names. */ |
1676 | ||
eb3ff9a5 | 1677 | void |
51f0e40d | 1678 | reg_or_group_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1679 | completion_tracker &tracker, |
51f0e40d AB |
1680 | const char *text, const char *word) |
1681 | { | |
eb3ff9a5 PA |
1682 | reg_or_group_completer_1 (tracker, text, word, |
1683 | (complete_register_names | |
1684 | | complete_reggroup_names)); | |
51f0e40d AB |
1685 | } |
1686 | ||
1687 | /* Perform completion on reggroup names. */ | |
1688 | ||
eb3ff9a5 | 1689 | void |
51f0e40d | 1690 | reggroup_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1691 | completion_tracker &tracker, |
51f0e40d AB |
1692 | const char *text, const char *word) |
1693 | { | |
eb3ff9a5 PA |
1694 | reg_or_group_completer_1 (tracker, text, word, |
1695 | complete_reggroup_names); | |
51f0e40d | 1696 | } |
71c24708 | 1697 | |
6e1dbf8c PA |
1698 | /* The default completer_handle_brkchars implementation. */ |
1699 | ||
1700 | static void | |
1701 | default_completer_handle_brkchars (struct cmd_list_element *ignore, | |
eb3ff9a5 | 1702 | completion_tracker &tracker, |
6e1dbf8c PA |
1703 | const char *text, const char *word) |
1704 | { | |
1705 | set_rl_completer_word_break_characters | |
1706 | (current_language->la_word_break_characters ()); | |
1707 | } | |
1708 | ||
1709 | /* See definition in completer.h. */ | |
1710 | ||
1711 | completer_handle_brkchars_ftype * | |
1712 | completer_handle_brkchars_func_for_completer (completer_ftype *fn) | |
1713 | { | |
1714 | if (fn == filename_completer) | |
1715 | return filename_completer_handle_brkchars; | |
1716 | ||
c6756f62 PA |
1717 | if (fn == location_completer) |
1718 | return location_completer_handle_brkchars; | |
1719 | ||
6e1dbf8c PA |
1720 | if (fn == command_completer) |
1721 | return command_completer_handle_brkchars; | |
1722 | ||
1723 | return default_completer_handle_brkchars; | |
1724 | } | |
1725 | ||
c6756f62 PA |
1726 | /* Used as brkchars when we want to tell readline we have a custom |
1727 | word point. We do that by making our rl_completion_word_break_hook | |
1728 | set RL_POINT to the desired word point, and return the character at | |
1729 | the word break point as the break char. This is two bytes in order | |
1730 | to fit one break character plus the terminating null. */ | |
1731 | static char gdb_custom_word_point_brkchars[2]; | |
1732 | ||
1733 | /* Since rl_basic_quote_characters is not completer-specific, we save | |
1734 | its original value here, in order to be able to restore it in | |
1735 | gdb_rl_attempted_completion_function. */ | |
1736 | static const char *gdb_org_rl_basic_quote_characters = rl_basic_quote_characters; | |
1737 | ||
67c296a2 PM |
1738 | /* Get the list of chars that are considered as word breaks |
1739 | for the current command. */ | |
1740 | ||
eb3ff9a5 PA |
1741 | static char * |
1742 | gdb_completion_word_break_characters_throw () | |
67c296a2 | 1743 | { |
eb3ff9a5 PA |
1744 | /* New completion starting. Get rid of the previous tracker and |
1745 | start afresh. */ | |
1746 | delete current_completion.tracker; | |
1747 | current_completion.tracker = new completion_tracker (); | |
1748 | ||
1749 | completion_tracker &tracker = *current_completion.tracker; | |
1750 | ||
1751 | complete_line_internal (tracker, NULL, rl_line_buffer, | |
1752 | rl_point, handle_brkchars); | |
c5504eaf | 1753 | |
c6756f62 PA |
1754 | if (tracker.use_custom_word_point ()) |
1755 | { | |
1756 | gdb_assert (tracker.custom_word_point () > 0); | |
1757 | rl_point = tracker.custom_word_point () - 1; | |
1758 | gdb_custom_word_point_brkchars[0] = rl_line_buffer[rl_point]; | |
1759 | rl_completer_word_break_characters = gdb_custom_word_point_brkchars; | |
1760 | rl_completer_quote_characters = NULL; | |
1761 | ||
1762 | /* Clear this too, so that if we're completing a quoted string, | |
1763 | readline doesn't consider the quote character a delimiter. | |
1764 | If we didn't do this, readline would auto-complete {b | |
1765 | 'fun<tab>} to {'b 'function()'}, i.e., add the terminating | |
1766 | \', but, it wouldn't append the separator space either, which | |
1767 | is not desirable. So instead we take care of appending the | |
1768 | quote character to the LCD ourselves, in | |
1769 | gdb_rl_attempted_completion_function. Since this global is | |
1770 | not just completer-specific, we'll restore it back to the | |
1771 | default in gdb_rl_attempted_completion_function. */ | |
1772 | rl_basic_quote_characters = NULL; | |
1773 | } | |
1774 | ||
67c296a2 | 1775 | return rl_completer_word_break_characters; |
14032a66 TT |
1776 | } |
1777 | ||
eb3ff9a5 PA |
1778 | char * |
1779 | gdb_completion_word_break_characters () | |
1780 | { | |
1781 | /* New completion starting. */ | |
1782 | current_completion.aborted = false; | |
83d31a92 | 1783 | |
eb3ff9a5 PA |
1784 | TRY |
1785 | { | |
1786 | return gdb_completion_word_break_characters_throw (); | |
1787 | } | |
1788 | CATCH (ex, RETURN_MASK_ALL) | |
1789 | { | |
1790 | /* Set this to that gdb_rl_attempted_completion_function knows | |
1791 | to abort early. */ | |
1792 | current_completion.aborted = true; | |
1793 | } | |
1794 | END_CATCH | |
83d31a92 | 1795 | |
eb3ff9a5 PA |
1796 | return NULL; |
1797 | } | |
83d31a92 | 1798 | |
eb3ff9a5 | 1799 | /* See completer.h. */ |
83d31a92 | 1800 | |
6a2c1b87 PA |
1801 | const char * |
1802 | completion_find_completion_word (completion_tracker &tracker, const char *text, | |
1803 | int *quote_char) | |
1804 | { | |
1805 | size_t point = strlen (text); | |
1806 | ||
1807 | complete_line_internal (tracker, NULL, text, point, handle_brkchars); | |
1808 | ||
c6756f62 PA |
1809 | if (tracker.use_custom_word_point ()) |
1810 | { | |
1811 | gdb_assert (tracker.custom_word_point () > 0); | |
1812 | *quote_char = tracker.quote_char (); | |
1813 | return text + tracker.custom_word_point (); | |
1814 | } | |
1815 | ||
6a2c1b87 PA |
1816 | gdb_rl_completion_word_info info; |
1817 | ||
1818 | info.word_break_characters = rl_completer_word_break_characters; | |
1819 | info.quote_characters = gdb_completer_quote_characters; | |
1820 | info.basic_quote_characters = rl_basic_quote_characters; | |
1821 | ||
1822 | return gdb_rl_find_completion_word (&info, quote_char, NULL, text); | |
1823 | } | |
1824 | ||
1825 | /* See completer.h. */ | |
1826 | ||
eb3ff9a5 PA |
1827 | void |
1828 | completion_tracker::recompute_lowest_common_denominator (const char *new_match) | |
83d31a92 | 1829 | { |
eb3ff9a5 PA |
1830 | if (m_lowest_common_denominator == NULL) |
1831 | { | |
1832 | /* We don't have a lowest common denominator yet, so simply take | |
1833 | the whole NEW_MATCH as being it. */ | |
1834 | m_lowest_common_denominator = xstrdup (new_match); | |
1835 | m_lowest_common_denominator_unique = true; | |
1836 | } | |
1837 | else | |
83d31a92 | 1838 | { |
eb3ff9a5 PA |
1839 | /* Find the common denominator between the currently-known |
1840 | lowest common denominator and NEW_MATCH. That becomes the | |
1841 | new lowest common denominator. */ | |
1842 | size_t i; | |
83d31a92 | 1843 | |
eb3ff9a5 PA |
1844 | for (i = 0; |
1845 | (new_match[i] != '\0' | |
1846 | && new_match[i] == m_lowest_common_denominator[i]); | |
1847 | i++) | |
1848 | ; | |
1849 | if (m_lowest_common_denominator[i] != new_match[i]) | |
83d31a92 | 1850 | { |
eb3ff9a5 PA |
1851 | m_lowest_common_denominator[i] = '\0'; |
1852 | m_lowest_common_denominator_unique = false; | |
c5f0f3d0 FN |
1853 | } |
1854 | } | |
eb3ff9a5 PA |
1855 | } |
1856 | ||
c6756f62 PA |
1857 | /* See completer.h. */ |
1858 | ||
1859 | void | |
1860 | completion_tracker::advance_custom_word_point_by (size_t len) | |
1861 | { | |
1862 | m_custom_word_point += len; | |
1863 | } | |
1864 | ||
eb3ff9a5 PA |
1865 | /* Build a new C string that is a copy of LCD with the whitespace of |
1866 | ORIG/ORIG_LEN preserved. | |
1867 | ||
1868 | Say the user is completing a symbol name, with spaces, like: | |
1869 | ||
1870 | "foo ( i" | |
1871 | ||
1872 | and the resulting completion match is: | |
1873 | ||
1874 | "foo(int)" | |
1875 | ||
1876 | we want to end up with an input line like: | |
1877 | ||
1878 | "foo ( int)" | |
1879 | ^^^^^^^ => text from LCD [1], whitespace from ORIG preserved. | |
1880 | ^^ => new text from LCD | |
1881 | ||
1882 | [1] - We must take characters from the LCD instead of the original | |
1883 | text, since some completions want to change upper/lowercase. E.g.: | |
c5f0f3d0 | 1884 | |
eb3ff9a5 | 1885 | "handle sig<>" |
c5f0f3d0 | 1886 | |
eb3ff9a5 PA |
1887 | completes to: |
1888 | ||
1889 | "handle SIG[QUIT|etc.]" | |
1890 | */ | |
1891 | ||
1892 | static char * | |
1893 | expand_preserving_ws (const char *orig, size_t orig_len, | |
1894 | const char *lcd) | |
1895 | { | |
1896 | const char *p_orig = orig; | |
1897 | const char *orig_end = orig + orig_len; | |
1898 | const char *p_lcd = lcd; | |
1899 | std::string res; | |
1900 | ||
1901 | while (p_orig < orig_end) | |
c5f0f3d0 | 1902 | { |
eb3ff9a5 PA |
1903 | if (*p_orig == ' ') |
1904 | { | |
1905 | while (p_orig < orig_end && *p_orig == ' ') | |
1906 | res += *p_orig++; | |
f1735a53 | 1907 | p_lcd = skip_spaces (p_lcd); |
eb3ff9a5 PA |
1908 | } |
1909 | else | |
c5f0f3d0 | 1910 | { |
eb3ff9a5 PA |
1911 | /* Take characters from the LCD instead of the original |
1912 | text, since some completions change upper/lowercase. | |
1913 | E.g.: | |
1914 | "handle sig<>" | |
1915 | completes to: | |
1916 | "handle SIG[QUIT|etc.]" | |
1917 | */ | |
1918 | res += *p_lcd; | |
1919 | p_orig++; | |
1920 | p_lcd++; | |
c5f0f3d0 FN |
1921 | } |
1922 | } | |
1923 | ||
eb3ff9a5 PA |
1924 | while (*p_lcd != '\0') |
1925 | res += *p_lcd++; | |
1926 | ||
1927 | return xstrdup (res.c_str ()); | |
1928 | } | |
1929 | ||
1930 | /* See completer.h. */ | |
1931 | ||
1932 | completion_result | |
1933 | completion_tracker::build_completion_result (const char *text, | |
1934 | int start, int end) | |
1935 | { | |
1936 | completion_list &list = m_entries_vec; /* The completions. */ | |
1937 | ||
1938 | if (list.empty ()) | |
1939 | return {}; | |
1940 | ||
1941 | /* +1 for the LCD, and +1 for NULL termination. */ | |
1942 | char **match_list = XNEWVEC (char *, 1 + list.size () + 1); | |
1943 | ||
1944 | /* Build replacement word, based on the LCD. */ | |
1945 | ||
1946 | match_list[0] | |
1947 | = expand_preserving_ws (text, end - start, | |
1948 | m_lowest_common_denominator); | |
1949 | ||
1950 | if (m_lowest_common_denominator_unique) | |
1951 | { | |
c6756f62 PA |
1952 | /* We don't rely on readline appending the quote char as |
1953 | delimiter as then readline wouldn't append the ' ' after the | |
1954 | completion. */ | |
1955 | char buf[2] = { quote_char () }; | |
1956 | ||
1957 | match_list[0] = reconcat (match_list[0], match_list[0], | |
1958 | buf, (char *) NULL); | |
eb3ff9a5 PA |
1959 | match_list[1] = NULL; |
1960 | ||
c45ec17c PA |
1961 | /* If the tracker wants to, or we already have a space at the |
1962 | end of the match, tell readline to skip appending | |
1963 | another. */ | |
eb3ff9a5 | 1964 | bool completion_suppress_append |
c45ec17c PA |
1965 | = (suppress_append_ws () |
1966 | || match_list[0][strlen (match_list[0]) - 1] == ' '); | |
eb3ff9a5 PA |
1967 | |
1968 | return completion_result (match_list, 1, completion_suppress_append); | |
1969 | } | |
1970 | else | |
1971 | { | |
1972 | int ix; | |
1973 | ||
1974 | for (ix = 0; ix < list.size (); ++ix) | |
1975 | match_list[ix + 1] = list[ix].release (); | |
1976 | match_list[ix + 1] = NULL; | |
1977 | ||
1978 | return completion_result (match_list, list.size (), false); | |
1979 | } | |
1980 | } | |
1981 | ||
1982 | /* See completer.h */ | |
1983 | ||
1984 | completion_result::completion_result () | |
1985 | : match_list (NULL), number_matches (0), | |
1986 | completion_suppress_append (false) | |
1987 | {} | |
1988 | ||
1989 | /* See completer.h */ | |
1990 | ||
1991 | completion_result::completion_result (char **match_list_, | |
1992 | size_t number_matches_, | |
1993 | bool completion_suppress_append_) | |
1994 | : match_list (match_list_), | |
1995 | number_matches (number_matches_), | |
1996 | completion_suppress_append (completion_suppress_append_) | |
1997 | {} | |
1998 | ||
1999 | /* See completer.h */ | |
2000 | ||
2001 | completion_result::~completion_result () | |
2002 | { | |
2003 | reset_match_list (); | |
2004 | } | |
2005 | ||
2006 | /* See completer.h */ | |
2007 | ||
2008 | completion_result::completion_result (completion_result &&rhs) | |
2009 | { | |
2010 | if (this == &rhs) | |
2011 | return; | |
2012 | ||
2013 | reset_match_list (); | |
2014 | match_list = rhs.match_list; | |
2015 | rhs.match_list = NULL; | |
2016 | number_matches = rhs.number_matches; | |
2017 | rhs.number_matches = 0; | |
2018 | } | |
2019 | ||
2020 | /* See completer.h */ | |
2021 | ||
2022 | char ** | |
2023 | completion_result::release_match_list () | |
2024 | { | |
2025 | char **ret = match_list; | |
2026 | match_list = NULL; | |
2027 | return ret; | |
2028 | } | |
2029 | ||
eb3ff9a5 PA |
2030 | /* See completer.h */ |
2031 | ||
2032 | void | |
2033 | completion_result::sort_match_list () | |
2034 | { | |
2035 | if (number_matches > 1) | |
2036 | { | |
2037 | /* Element 0 is special (it's the common prefix), leave it | |
2038 | be. */ | |
2039 | std::sort (&match_list[1], | |
2040 | &match_list[number_matches + 1], | |
2041 | compare_cstrings); | |
2042 | } | |
2043 | } | |
2044 | ||
2045 | /* See completer.h */ | |
2046 | ||
2047 | void | |
2048 | completion_result::reset_match_list () | |
2049 | { | |
2050 | if (match_list != NULL) | |
2051 | { | |
2052 | for (char **p = match_list; *p != NULL; p++) | |
2053 | xfree (*p); | |
2054 | xfree (match_list); | |
2055 | match_list = NULL; | |
2056 | } | |
2057 | } | |
2058 | ||
2059 | /* Helper for gdb_rl_attempted_completion_function, which does most of | |
2060 | the work. This is called by readline to build the match list array | |
2061 | and to determine the lowest common denominator. The real matches | |
2062 | list starts at match[1], while match[0] is the slot holding | |
2063 | readline's idea of the lowest common denominator of all matches, | |
2064 | which is what readline replaces the completion "word" with. | |
2065 | ||
2066 | TEXT is the caller's idea of the "word" we are looking at, as | |
2067 | computed in the handle_brkchars phase. | |
2068 | ||
2069 | START is the offset from RL_LINE_BUFFER where TEXT starts. END is | |
2070 | the offset from RL_LINE_BUFFER where TEXT ends (i.e., where | |
2071 | rl_point is). | |
2072 | ||
2073 | You should thus pretend that the line ends at END (relative to | |
2074 | RL_LINE_BUFFER). | |
2075 | ||
2076 | RL_LINE_BUFFER contains the entire text of the line. RL_POINT is | |
2077 | the offset in that line of the cursor. You should pretend that the | |
2078 | line ends at POINT. | |
2079 | ||
2080 | Returns NULL if there are no completions. */ | |
2081 | ||
2082 | static char ** | |
2083 | gdb_rl_attempted_completion_function_throw (const char *text, int start, int end) | |
2084 | { | |
c6756f62 PA |
2085 | /* Completers that provide a custom word point in the |
2086 | handle_brkchars phase also compute their completions then. | |
2087 | Completers that leave the completion word handling to readline | |
2088 | must be called twice. If rl_point (i.e., END) is at column 0, | |
2089 | then readline skips the handle_brkchars phase, and so we create a | |
2090 | tracker now in that case too. */ | |
2091 | if (end == 0 || !current_completion.tracker->use_custom_word_point ()) | |
2092 | { | |
2093 | delete current_completion.tracker; | |
2094 | current_completion.tracker = new completion_tracker (); | |
eb3ff9a5 | 2095 | |
c6756f62 PA |
2096 | complete_line (*current_completion.tracker, text, |
2097 | rl_line_buffer, rl_point); | |
2098 | } | |
c5f0f3d0 | 2099 | |
eb3ff9a5 PA |
2100 | completion_tracker &tracker = *current_completion.tracker; |
2101 | ||
2102 | completion_result result | |
2103 | = tracker.build_completion_result (text, start, end); | |
2104 | ||
2105 | rl_completion_suppress_append = result.completion_suppress_append; | |
2106 | return result.release_match_list (); | |
2107 | } | |
2108 | ||
2109 | /* Function installed as "rl_attempted_completion_function" readline | |
2110 | hook. Wrapper around gdb_rl_attempted_completion_function_throw | |
2111 | that catches C++ exceptions, which can't cross readline. */ | |
2112 | ||
2113 | char ** | |
2114 | gdb_rl_attempted_completion_function (const char *text, int start, int end) | |
2115 | { | |
c6756f62 PA |
2116 | /* Restore globals that might have been tweaked in |
2117 | gdb_completion_word_break_characters. */ | |
2118 | rl_basic_quote_characters = gdb_org_rl_basic_quote_characters; | |
2119 | ||
eb3ff9a5 PA |
2120 | /* If we end up returning NULL, either on error, or simple because |
2121 | there are no matches, inhibit readline's default filename | |
2122 | completer. */ | |
2123 | rl_attempted_completion_over = 1; | |
2124 | ||
2125 | /* If the handle_brkchars phase was aborted, don't try | |
2126 | completing. */ | |
2127 | if (current_completion.aborted) | |
2128 | return NULL; | |
2129 | ||
2130 | TRY | |
2131 | { | |
2132 | return gdb_rl_attempted_completion_function_throw (text, start, end); | |
2133 | } | |
2134 | CATCH (ex, RETURN_MASK_ALL) | |
2135 | { | |
2136 | } | |
2137 | END_CATCH | |
2138 | ||
2139 | return NULL; | |
c5f0f3d0 | 2140 | } |
4e87b832 KD |
2141 | |
2142 | /* Skip over the possibly quoted word STR (as defined by the quote | |
b021a221 MS |
2143 | characters QUOTECHARS and the word break characters BREAKCHARS). |
2144 | Returns pointer to the location after the "word". If either | |
2145 | QUOTECHARS or BREAKCHARS is NULL, use the same values used by the | |
2146 | completer. */ | |
c5f0f3d0 | 2147 | |
d7561cbb KS |
2148 | const char * |
2149 | skip_quoted_chars (const char *str, const char *quotechars, | |
2150 | const char *breakchars) | |
c5f0f3d0 FN |
2151 | { |
2152 | char quote_char = '\0'; | |
d7561cbb | 2153 | const char *scan; |
c5f0f3d0 | 2154 | |
4e87b832 KD |
2155 | if (quotechars == NULL) |
2156 | quotechars = gdb_completer_quote_characters; | |
2157 | ||
2158 | if (breakchars == NULL) | |
51065942 | 2159 | breakchars = current_language->la_word_break_characters(); |
4e87b832 | 2160 | |
c5f0f3d0 FN |
2161 | for (scan = str; *scan != '\0'; scan++) |
2162 | { | |
2163 | if (quote_char != '\0') | |
2164 | { | |
9c3f90bd | 2165 | /* Ignore everything until the matching close quote char. */ |
c5f0f3d0 FN |
2166 | if (*scan == quote_char) |
2167 | { | |
9c3f90bd | 2168 | /* Found matching close quote. */ |
c5f0f3d0 FN |
2169 | scan++; |
2170 | break; | |
2171 | } | |
2172 | } | |
4e87b832 | 2173 | else if (strchr (quotechars, *scan)) |
c5f0f3d0 | 2174 | { |
aff410f1 | 2175 | /* Found start of a quoted string. */ |
c5f0f3d0 FN |
2176 | quote_char = *scan; |
2177 | } | |
4e87b832 | 2178 | else if (strchr (breakchars, *scan)) |
c5f0f3d0 FN |
2179 | { |
2180 | break; | |
2181 | } | |
2182 | } | |
4e87b832 | 2183 | |
c5f0f3d0 FN |
2184 | return (scan); |
2185 | } | |
2186 | ||
4e87b832 KD |
2187 | /* Skip over the possibly quoted word STR (as defined by the quote |
2188 | characters and word break characters used by the completer). | |
9c3f90bd | 2189 | Returns pointer to the location after the "word". */ |
4e87b832 | 2190 | |
d7561cbb KS |
2191 | const char * |
2192 | skip_quoted (const char *str) | |
4e87b832 KD |
2193 | { |
2194 | return skip_quoted_chars (str, NULL, NULL); | |
2195 | } | |
ef0b411a GB |
2196 | |
2197 | /* Return a message indicating that the maximum number of completions | |
2198 | has been reached and that there may be more. */ | |
2199 | ||
2200 | const char * | |
2201 | get_max_completions_reached_message (void) | |
2202 | { | |
2203 | return _("*** List may be truncated, max-completions reached. ***"); | |
2204 | } | |
82083d6d DE |
2205 | \f |
2206 | /* GDB replacement for rl_display_match_list. | |
2207 | Readline doesn't provide a clean interface for TUI(curses). | |
2208 | A hack previously used was to send readline's rl_outstream through a pipe | |
2209 | and read it from the event loop. Bleah. IWBN if readline abstracted | |
2210 | away all the necessary bits, and this is what this code does. It | |
2211 | replicates the parts of readline we need and then adds an abstraction | |
2212 | layer, currently implemented as struct match_list_displayer, so that both | |
2213 | CLI and TUI can use it. We copy all this readline code to minimize | |
2214 | GDB-specific mods to readline. Once this code performs as desired then | |
2215 | we can submit it to the readline maintainers. | |
2216 | ||
2217 | N.B. A lot of the code is the way it is in order to minimize differences | |
2218 | from readline's copy. */ | |
2219 | ||
2220 | /* Not supported here. */ | |
2221 | #undef VISIBLE_STATS | |
2222 | ||
2223 | #if defined (HANDLE_MULTIBYTE) | |
2224 | #define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2) | |
2225 | #define MB_NULLWCH(x) ((x) == 0) | |
2226 | #endif | |
2227 | ||
2228 | #define ELLIPSIS_LEN 3 | |
2229 | ||
2230 | /* gdb version of readline/complete.c:get_y_or_n. | |
2231 | 'y' -> returns 1, and 'n' -> returns 0. | |
2232 | Also supported: space == 'y', RUBOUT == 'n', ctrl-g == start over. | |
2233 | If FOR_PAGER is non-zero, then also supported are: | |
2234 | NEWLINE or RETURN -> returns 2, and 'q' -> returns 0. */ | |
2235 | ||
2236 | static int | |
2237 | gdb_get_y_or_n (int for_pager, const struct match_list_displayer *displayer) | |
2238 | { | |
2239 | int c; | |
2240 | ||
2241 | for (;;) | |
2242 | { | |
2243 | RL_SETSTATE (RL_STATE_MOREINPUT); | |
2244 | c = displayer->read_key (displayer); | |
2245 | RL_UNSETSTATE (RL_STATE_MOREINPUT); | |
2246 | ||
2247 | if (c == 'y' || c == 'Y' || c == ' ') | |
2248 | return 1; | |
2249 | if (c == 'n' || c == 'N' || c == RUBOUT) | |
2250 | return 0; | |
2251 | if (c == ABORT_CHAR || c < 0) | |
2252 | { | |
2253 | /* Readline doesn't erase_entire_line here, but without it the | |
2254 | --More-- prompt isn't erased and neither is the text entered | |
2255 | thus far redisplayed. */ | |
2256 | displayer->erase_entire_line (displayer); | |
2257 | /* Note: The arguments to rl_abort are ignored. */ | |
2258 | rl_abort (0, 0); | |
2259 | } | |
2260 | if (for_pager && (c == NEWLINE || c == RETURN)) | |
2261 | return 2; | |
2262 | if (for_pager && (c == 'q' || c == 'Q')) | |
2263 | return 0; | |
2264 | displayer->beep (displayer); | |
2265 | } | |
2266 | } | |
2267 | ||
2268 | /* Pager function for tab-completion. | |
2269 | This is based on readline/complete.c:_rl_internal_pager. | |
2270 | LINES is the number of lines of output displayed thus far. | |
2271 | Returns: | |
2272 | -1 -> user pressed 'n' or equivalent, | |
2273 | 0 -> user pressed 'y' or equivalent, | |
2274 | N -> user pressed NEWLINE or equivalent and N is LINES - 1. */ | |
2275 | ||
2276 | static int | |
2277 | gdb_display_match_list_pager (int lines, | |
2278 | const struct match_list_displayer *displayer) | |
2279 | { | |
2280 | int i; | |
2281 | ||
2282 | displayer->puts (displayer, "--More--"); | |
2283 | displayer->flush (displayer); | |
2284 | i = gdb_get_y_or_n (1, displayer); | |
2285 | displayer->erase_entire_line (displayer); | |
2286 | if (i == 0) | |
2287 | return -1; | |
2288 | else if (i == 2) | |
2289 | return (lines - 1); | |
2290 | else | |
2291 | return 0; | |
2292 | } | |
2293 | ||
2294 | /* Return non-zero if FILENAME is a directory. | |
2295 | Based on readline/complete.c:path_isdir. */ | |
2296 | ||
2297 | static int | |
2298 | gdb_path_isdir (const char *filename) | |
2299 | { | |
2300 | struct stat finfo; | |
2301 | ||
2302 | return (stat (filename, &finfo) == 0 && S_ISDIR (finfo.st_mode)); | |
2303 | } | |
2304 | ||
2305 | /* Return the portion of PATHNAME that should be output when listing | |
2306 | possible completions. If we are hacking filename completion, we | |
2307 | are only interested in the basename, the portion following the | |
2308 | final slash. Otherwise, we return what we were passed. Since | |
2309 | printing empty strings is not very informative, if we're doing | |
2310 | filename completion, and the basename is the empty string, we look | |
2311 | for the previous slash and return the portion following that. If | |
2312 | there's no previous slash, we just return what we were passed. | |
2313 | ||
2314 | Based on readline/complete.c:printable_part. */ | |
2315 | ||
2316 | static char * | |
2317 | gdb_printable_part (char *pathname) | |
2318 | { | |
2319 | char *temp, *x; | |
2320 | ||
2321 | if (rl_filename_completion_desired == 0) /* don't need to do anything */ | |
2322 | return (pathname); | |
2323 | ||
2324 | temp = strrchr (pathname, '/'); | |
5836a818 | 2325 | #if defined (__MSDOS__) |
82083d6d DE |
2326 | if (temp == 0 && ISALPHA ((unsigned char)pathname[0]) && pathname[1] == ':') |
2327 | temp = pathname + 1; | |
2328 | #endif | |
2329 | ||
2330 | if (temp == 0 || *temp == '\0') | |
2331 | return (pathname); | |
2332 | /* If the basename is NULL, we might have a pathname like '/usr/src/'. | |
2333 | Look for a previous slash and, if one is found, return the portion | |
2334 | following that slash. If there's no previous slash, just return the | |
2335 | pathname we were passed. */ | |
2336 | else if (temp[1] == '\0') | |
2337 | { | |
2338 | for (x = temp - 1; x > pathname; x--) | |
2339 | if (*x == '/') | |
2340 | break; | |
2341 | return ((*x == '/') ? x + 1 : pathname); | |
2342 | } | |
2343 | else | |
2344 | return ++temp; | |
2345 | } | |
2346 | ||
2347 | /* Compute width of STRING when displayed on screen by print_filename. | |
2348 | Based on readline/complete.c:fnwidth. */ | |
2349 | ||
2350 | static int | |
2351 | gdb_fnwidth (const char *string) | |
2352 | { | |
2353 | int width, pos; | |
2354 | #if defined (HANDLE_MULTIBYTE) | |
2355 | mbstate_t ps; | |
2356 | int left, w; | |
2357 | size_t clen; | |
2358 | wchar_t wc; | |
2359 | ||
2360 | left = strlen (string) + 1; | |
2361 | memset (&ps, 0, sizeof (mbstate_t)); | |
2362 | #endif | |
2363 | ||
2364 | width = pos = 0; | |
2365 | while (string[pos]) | |
2366 | { | |
2367 | if (CTRL_CHAR (string[pos]) || string[pos] == RUBOUT) | |
2368 | { | |
2369 | width += 2; | |
2370 | pos++; | |
2371 | } | |
2372 | else | |
2373 | { | |
2374 | #if defined (HANDLE_MULTIBYTE) | |
2375 | clen = mbrtowc (&wc, string + pos, left - pos, &ps); | |
2376 | if (MB_INVALIDCH (clen)) | |
2377 | { | |
2378 | width++; | |
2379 | pos++; | |
2380 | memset (&ps, 0, sizeof (mbstate_t)); | |
2381 | } | |
2382 | else if (MB_NULLWCH (clen)) | |
2383 | break; | |
2384 | else | |
2385 | { | |
2386 | pos += clen; | |
2387 | w = wcwidth (wc); | |
2388 | width += (w >= 0) ? w : 1; | |
2389 | } | |
2390 | #else | |
2391 | width++; | |
2392 | pos++; | |
2393 | #endif | |
2394 | } | |
2395 | } | |
2396 | ||
2397 | return width; | |
2398 | } | |
2399 | ||
2400 | /* Print TO_PRINT, one matching completion. | |
2401 | PREFIX_BYTES is number of common prefix bytes. | |
2402 | Based on readline/complete.c:fnprint. */ | |
2403 | ||
2404 | static int | |
2405 | gdb_fnprint (const char *to_print, int prefix_bytes, | |
2406 | const struct match_list_displayer *displayer) | |
2407 | { | |
2408 | int printed_len, w; | |
2409 | const char *s; | |
2410 | #if defined (HANDLE_MULTIBYTE) | |
2411 | mbstate_t ps; | |
2412 | const char *end; | |
2413 | size_t tlen; | |
2414 | int width; | |
2415 | wchar_t wc; | |
2416 | ||
2417 | end = to_print + strlen (to_print) + 1; | |
2418 | memset (&ps, 0, sizeof (mbstate_t)); | |
2419 | #endif | |
2420 | ||
2421 | printed_len = 0; | |
2422 | ||
2423 | /* Don't print only the ellipsis if the common prefix is one of the | |
2424 | possible completions */ | |
2425 | if (to_print[prefix_bytes] == '\0') | |
2426 | prefix_bytes = 0; | |
2427 | ||
2428 | if (prefix_bytes) | |
2429 | { | |
2430 | char ellipsis; | |
2431 | ||
2432 | ellipsis = (to_print[prefix_bytes] == '.') ? '_' : '.'; | |
2433 | for (w = 0; w < ELLIPSIS_LEN; w++) | |
2434 | displayer->putch (displayer, ellipsis); | |
2435 | printed_len = ELLIPSIS_LEN; | |
2436 | } | |
2437 | ||
2438 | s = to_print + prefix_bytes; | |
2439 | while (*s) | |
2440 | { | |
2441 | if (CTRL_CHAR (*s)) | |
2442 | { | |
2443 | displayer->putch (displayer, '^'); | |
2444 | displayer->putch (displayer, UNCTRL (*s)); | |
2445 | printed_len += 2; | |
2446 | s++; | |
2447 | #if defined (HANDLE_MULTIBYTE) | |
2448 | memset (&ps, 0, sizeof (mbstate_t)); | |
2449 | #endif | |
2450 | } | |
2451 | else if (*s == RUBOUT) | |
2452 | { | |
2453 | displayer->putch (displayer, '^'); | |
2454 | displayer->putch (displayer, '?'); | |
2455 | printed_len += 2; | |
2456 | s++; | |
2457 | #if defined (HANDLE_MULTIBYTE) | |
2458 | memset (&ps, 0, sizeof (mbstate_t)); | |
2459 | #endif | |
2460 | } | |
2461 | else | |
2462 | { | |
2463 | #if defined (HANDLE_MULTIBYTE) | |
2464 | tlen = mbrtowc (&wc, s, end - s, &ps); | |
2465 | if (MB_INVALIDCH (tlen)) | |
2466 | { | |
2467 | tlen = 1; | |
2468 | width = 1; | |
2469 | memset (&ps, 0, sizeof (mbstate_t)); | |
2470 | } | |
2471 | else if (MB_NULLWCH (tlen)) | |
2472 | break; | |
2473 | else | |
2474 | { | |
2475 | w = wcwidth (wc); | |
2476 | width = (w >= 0) ? w : 1; | |
2477 | } | |
2478 | for (w = 0; w < tlen; ++w) | |
2479 | displayer->putch (displayer, s[w]); | |
2480 | s += tlen; | |
2481 | printed_len += width; | |
2482 | #else | |
2483 | displayer->putch (displayer, *s); | |
2484 | s++; | |
2485 | printed_len++; | |
2486 | #endif | |
2487 | } | |
2488 | } | |
2489 | ||
2490 | return printed_len; | |
2491 | } | |
2492 | ||
2493 | /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we | |
2494 | are using it, check for and output a single character for `special' | |
2495 | filenames. Return the number of characters we output. | |
2496 | Based on readline/complete.c:print_filename. */ | |
2497 | ||
2498 | static int | |
2499 | gdb_print_filename (char *to_print, char *full_pathname, int prefix_bytes, | |
2500 | const struct match_list_displayer *displayer) | |
2501 | { | |
2502 | int printed_len, extension_char, slen, tlen; | |
a121b7c1 PA |
2503 | char *s, c, *new_full_pathname; |
2504 | const char *dn; | |
82083d6d DE |
2505 | extern int _rl_complete_mark_directories; |
2506 | ||
2507 | extension_char = 0; | |
2508 | printed_len = gdb_fnprint (to_print, prefix_bytes, displayer); | |
2509 | ||
2510 | #if defined (VISIBLE_STATS) | |
2511 | if (rl_filename_completion_desired && (rl_visible_stats || _rl_complete_mark_directories)) | |
2512 | #else | |
2513 | if (rl_filename_completion_desired && _rl_complete_mark_directories) | |
2514 | #endif | |
2515 | { | |
2516 | /* If to_print != full_pathname, to_print is the basename of the | |
2517 | path passed. In this case, we try to expand the directory | |
2518 | name before checking for the stat character. */ | |
2519 | if (to_print != full_pathname) | |
2520 | { | |
2521 | /* Terminate the directory name. */ | |
2522 | c = to_print[-1]; | |
2523 | to_print[-1] = '\0'; | |
2524 | ||
2525 | /* If setting the last slash in full_pathname to a NUL results in | |
2526 | full_pathname being the empty string, we are trying to complete | |
2527 | files in the root directory. If we pass a null string to the | |
2528 | bash directory completion hook, for example, it will expand it | |
2529 | to the current directory. We just want the `/'. */ | |
2530 | if (full_pathname == 0 || *full_pathname == 0) | |
2531 | dn = "/"; | |
2532 | else if (full_pathname[0] != '/') | |
2533 | dn = full_pathname; | |
2534 | else if (full_pathname[1] == 0) | |
2535 | dn = "//"; /* restore trailing slash to `//' */ | |
2536 | else if (full_pathname[1] == '/' && full_pathname[2] == 0) | |
2537 | dn = "/"; /* don't turn /// into // */ | |
2538 | else | |
2539 | dn = full_pathname; | |
2540 | s = tilde_expand (dn); | |
2541 | if (rl_directory_completion_hook) | |
2542 | (*rl_directory_completion_hook) (&s); | |
2543 | ||
2544 | slen = strlen (s); | |
2545 | tlen = strlen (to_print); | |
2546 | new_full_pathname = (char *)xmalloc (slen + tlen + 2); | |
2547 | strcpy (new_full_pathname, s); | |
2548 | if (s[slen - 1] == '/') | |
2549 | slen--; | |
2550 | else | |
2551 | new_full_pathname[slen] = '/'; | |
2552 | new_full_pathname[slen] = '/'; | |
2553 | strcpy (new_full_pathname + slen + 1, to_print); | |
2554 | ||
2555 | #if defined (VISIBLE_STATS) | |
2556 | if (rl_visible_stats) | |
2557 | extension_char = stat_char (new_full_pathname); | |
2558 | else | |
2559 | #endif | |
2560 | if (gdb_path_isdir (new_full_pathname)) | |
2561 | extension_char = '/'; | |
2562 | ||
2563 | xfree (new_full_pathname); | |
2564 | to_print[-1] = c; | |
2565 | } | |
2566 | else | |
2567 | { | |
2568 | s = tilde_expand (full_pathname); | |
2569 | #if defined (VISIBLE_STATS) | |
2570 | if (rl_visible_stats) | |
2571 | extension_char = stat_char (s); | |
2572 | else | |
2573 | #endif | |
2574 | if (gdb_path_isdir (s)) | |
2575 | extension_char = '/'; | |
2576 | } | |
2577 | ||
2578 | xfree (s); | |
2579 | if (extension_char) | |
2580 | { | |
2581 | displayer->putch (displayer, extension_char); | |
2582 | printed_len++; | |
2583 | } | |
2584 | } | |
2585 | ||
2586 | return printed_len; | |
2587 | } | |
2588 | ||
2589 | /* GDB version of readline/complete.c:complete_get_screenwidth. */ | |
2590 | ||
2591 | static int | |
2592 | gdb_complete_get_screenwidth (const struct match_list_displayer *displayer) | |
2593 | { | |
2594 | /* Readline has other stuff here which it's not clear we need. */ | |
2595 | return displayer->width; | |
2596 | } | |
2597 | ||
56000a98 PA |
2598 | extern int _rl_completion_prefix_display_length; |
2599 | extern int _rl_print_completions_horizontally; | |
2600 | ||
2601 | EXTERN_C int _rl_qsort_string_compare (const void *, const void *); | |
2602 | typedef int QSFUNC (const void *, const void *); | |
2603 | ||
82083d6d | 2604 | /* GDB version of readline/complete.c:rl_display_match_list. |
ef0b411a GB |
2605 | See gdb_display_match_list for a description of MATCHES, LEN, MAX. |
2606 | Returns non-zero if all matches are displayed. */ | |
82083d6d | 2607 | |
ef0b411a | 2608 | static int |
82083d6d DE |
2609 | gdb_display_match_list_1 (char **matches, int len, int max, |
2610 | const struct match_list_displayer *displayer) | |
2611 | { | |
2612 | int count, limit, printed_len, lines, cols; | |
2613 | int i, j, k, l, common_length, sind; | |
2614 | char *temp, *t; | |
2615 | int page_completions = displayer->height != INT_MAX && pagination_enabled; | |
82083d6d DE |
2616 | |
2617 | /* Find the length of the prefix common to all items: length as displayed | |
2618 | characters (common_length) and as a byte index into the matches (sind) */ | |
2619 | common_length = sind = 0; | |
2620 | if (_rl_completion_prefix_display_length > 0) | |
2621 | { | |
2622 | t = gdb_printable_part (matches[0]); | |
2623 | temp = strrchr (t, '/'); | |
2624 | common_length = temp ? gdb_fnwidth (temp) : gdb_fnwidth (t); | |
2625 | sind = temp ? strlen (temp) : strlen (t); | |
2626 | ||
2627 | if (common_length > _rl_completion_prefix_display_length && common_length > ELLIPSIS_LEN) | |
2628 | max -= common_length - ELLIPSIS_LEN; | |
2629 | else | |
2630 | common_length = sind = 0; | |
2631 | } | |
2632 | ||
2633 | /* How many items of MAX length can we fit in the screen window? */ | |
2634 | cols = gdb_complete_get_screenwidth (displayer); | |
2635 | max += 2; | |
2636 | limit = cols / max; | |
2637 | if (limit != 1 && (limit * max == cols)) | |
2638 | limit--; | |
2639 | ||
2640 | /* If cols == 0, limit will end up -1 */ | |
2641 | if (cols < displayer->width && limit < 0) | |
2642 | limit = 1; | |
2643 | ||
2644 | /* Avoid a possible floating exception. If max > cols, | |
2645 | limit will be 0 and a divide-by-zero fault will result. */ | |
2646 | if (limit == 0) | |
2647 | limit = 1; | |
2648 | ||
2649 | /* How many iterations of the printing loop? */ | |
2650 | count = (len + (limit - 1)) / limit; | |
2651 | ||
2652 | /* Watch out for special case. If LEN is less than LIMIT, then | |
2653 | just do the inner printing loop. | |
2654 | 0 < len <= limit implies count = 1. */ | |
2655 | ||
2656 | /* Sort the items if they are not already sorted. */ | |
2657 | if (rl_ignore_completion_duplicates == 0 && rl_sort_completion_matches) | |
2658 | qsort (matches + 1, len, sizeof (char *), (QSFUNC *)_rl_qsort_string_compare); | |
2659 | ||
2660 | displayer->crlf (displayer); | |
2661 | ||
2662 | lines = 0; | |
2663 | if (_rl_print_completions_horizontally == 0) | |
2664 | { | |
2665 | /* Print the sorted items, up-and-down alphabetically, like ls. */ | |
2666 | for (i = 1; i <= count; i++) | |
2667 | { | |
2668 | for (j = 0, l = i; j < limit; j++) | |
2669 | { | |
2670 | if (l > len || matches[l] == 0) | |
2671 | break; | |
2672 | else | |
2673 | { | |
2674 | temp = gdb_printable_part (matches[l]); | |
2675 | printed_len = gdb_print_filename (temp, matches[l], sind, | |
2676 | displayer); | |
2677 | ||
2678 | if (j + 1 < limit) | |
2679 | for (k = 0; k < max - printed_len; k++) | |
2680 | displayer->putch (displayer, ' '); | |
2681 | } | |
2682 | l += count; | |
2683 | } | |
2684 | displayer->crlf (displayer); | |
2685 | lines++; | |
2686 | if (page_completions && lines >= (displayer->height - 1) && i < count) | |
2687 | { | |
2688 | lines = gdb_display_match_list_pager (lines, displayer); | |
2689 | if (lines < 0) | |
ef0b411a | 2690 | return 0; |
82083d6d DE |
2691 | } |
2692 | } | |
2693 | } | |
2694 | else | |
2695 | { | |
2696 | /* Print the sorted items, across alphabetically, like ls -x. */ | |
2697 | for (i = 1; matches[i]; i++) | |
2698 | { | |
2699 | temp = gdb_printable_part (matches[i]); | |
2700 | printed_len = gdb_print_filename (temp, matches[i], sind, displayer); | |
2701 | /* Have we reached the end of this line? */ | |
2702 | if (matches[i+1]) | |
2703 | { | |
2704 | if (i && (limit > 1) && (i % limit) == 0) | |
2705 | { | |
2706 | displayer->crlf (displayer); | |
2707 | lines++; | |
2708 | if (page_completions && lines >= displayer->height - 1) | |
2709 | { | |
2710 | lines = gdb_display_match_list_pager (lines, displayer); | |
2711 | if (lines < 0) | |
ef0b411a | 2712 | return 0; |
82083d6d DE |
2713 | } |
2714 | } | |
2715 | else | |
2716 | for (k = 0; k < max - printed_len; k++) | |
2717 | displayer->putch (displayer, ' '); | |
2718 | } | |
2719 | } | |
2720 | displayer->crlf (displayer); | |
2721 | } | |
ef0b411a GB |
2722 | |
2723 | return 1; | |
82083d6d DE |
2724 | } |
2725 | ||
2726 | /* Utility for displaying completion list matches, used by both CLI and TUI. | |
2727 | ||
2728 | MATCHES is the list of strings, in argv format, LEN is the number of | |
05cdcf3d DE |
2729 | strings in MATCHES, and MAX is the length of the longest string in |
2730 | MATCHES. */ | |
82083d6d DE |
2731 | |
2732 | void | |
2733 | gdb_display_match_list (char **matches, int len, int max, | |
2734 | const struct match_list_displayer *displayer) | |
2735 | { | |
ef0b411a GB |
2736 | /* Readline will never call this if complete_line returned NULL. */ |
2737 | gdb_assert (max_completions != 0); | |
2738 | ||
2739 | /* complete_line will never return more than this. */ | |
2740 | if (max_completions > 0) | |
2741 | gdb_assert (len <= max_completions); | |
2742 | ||
82083d6d DE |
2743 | if (rl_completion_query_items > 0 && len >= rl_completion_query_items) |
2744 | { | |
2745 | char msg[100]; | |
2746 | ||
2747 | /* We can't use *query here because they wait for <RET> which is | |
2748 | wrong here. This follows the readline version as closely as possible | |
2749 | for compatibility's sake. See readline/complete.c. */ | |
2750 | ||
2751 | displayer->crlf (displayer); | |
2752 | ||
2753 | xsnprintf (msg, sizeof (msg), | |
2754 | "Display all %d possibilities? (y or n)", len); | |
2755 | displayer->puts (displayer, msg); | |
2756 | displayer->flush (displayer); | |
2757 | ||
2758 | if (gdb_get_y_or_n (0, displayer) == 0) | |
2759 | { | |
2760 | displayer->crlf (displayer); | |
2761 | return; | |
2762 | } | |
2763 | } | |
2764 | ||
ef0b411a GB |
2765 | if (gdb_display_match_list_1 (matches, len, max, displayer)) |
2766 | { | |
2767 | /* Note: MAX_COMPLETIONS may be -1 or zero, but LEN is always > 0. */ | |
2768 | if (len == max_completions) | |
2769 | { | |
2770 | /* The maximum number of completions has been reached. Warn the user | |
2771 | that there may be more. */ | |
2772 | const char *message = get_max_completions_reached_message (); | |
2773 | ||
2774 | displayer->puts (displayer, message); | |
2775 | displayer->crlf (displayer); | |
2776 | } | |
2777 | } | |
2778 | } | |
ef0b411a GB |
2779 | |
2780 | void | |
2781 | _initialize_completer (void) | |
2782 | { | |
2783 | add_setshow_zuinteger_unlimited_cmd ("max-completions", no_class, | |
2784 | &max_completions, _("\ | |
2785 | Set maximum number of completion candidates."), _("\ | |
2786 | Show maximum number of completion candidates."), _("\ | |
2787 | Use this to limit the number of candidates considered\n\ | |
2788 | during completion. Specifying \"unlimited\" or -1\n\ | |
2789 | disables limiting. Note that setting either no limit or\n\ | |
2790 | a very large limit can make completion slow."), | |
2791 | NULL, NULL, &setlist, &showlist); | |
82083d6d | 2792 | } |