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c5f0f3d0 | 1 | /* Line completion stuff for GDB, the GNU debugger. |
1d506c26 | 2 | Copyright (C) 2000-2024 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" | |
4de283e4 | 20 | #include "symtab.h" |
d55e5aa6 | 21 | #include "gdbtypes.h" |
4de283e4 | 22 | #include "expression.h" |
ef0f16cc | 23 | #include "filenames.h" |
51065942 | 24 | #include "language.h" |
268a13a5 | 25 | #include "gdbsupport/gdb_signals.h" |
d55e5aa6 | 26 | #include "target.h" |
4de283e4 | 27 | #include "reggroups.h" |
71c24708 | 28 | #include "user-regs.h" |
4de283e4 TT |
29 | #include "arch-utils.h" |
30 | #include "location.h" | |
31 | #include <algorithm> | |
32 | #include "linespec.h" | |
33 | #include "cli/cli-decode.h" | |
3b9ff5d9 | 34 | #include "gdbsupport/gdb_tilde_expand.h" |
18a642a1 | 35 | |
03717487 MS |
36 | /* FIXME: This is needed because of lookup_cmd_1 (). We should be |
37 | calling a hook instead so we eliminate the CLI dependency. */ | |
c5f0f3d0 FN |
38 | #include "gdbcmd.h" |
39 | ||
1add37b5 | 40 | /* Needed for rl_completer_word_break_characters and for |
38017ce8 | 41 | rl_filename_completion_function. */ |
dbda9972 | 42 | #include "readline/readline.h" |
c5f0f3d0 FN |
43 | |
44 | /* readline defines this. */ | |
45 | #undef savestring | |
46 | ||
47 | #include "completer.h" | |
48 | ||
724fd9ba AB |
49 | /* See completer.h. */ |
50 | ||
51 | class completion_tracker::completion_hash_entry | |
52 | { | |
53 | public: | |
54 | /* Constructor. */ | |
55 | completion_hash_entry (gdb::unique_xmalloc_ptr<char> name, | |
56 | gdb::unique_xmalloc_ptr<char> lcd) | |
57 | : m_name (std::move (name)), | |
58 | m_lcd (std::move (lcd)) | |
59 | { | |
60 | /* Nothing. */ | |
61 | } | |
62 | ||
63 | /* Returns a pointer to the lowest common denominator string. This | |
64 | string will only be valid while this hash entry is still valid as the | |
65 | string continues to be owned by this hash entry and will be released | |
66 | when this entry is deleted. */ | |
67 | char *get_lcd () const | |
68 | { | |
69 | return m_lcd.get (); | |
70 | } | |
71 | ||
72 | /* Get, and release the name field from this hash entry. This can only | |
73 | be called once, after which the name field is no longer valid. This | |
74 | should be used to pass ownership of the name to someone else. */ | |
75 | char *release_name () | |
76 | { | |
77 | return m_name.release (); | |
78 | } | |
79 | ||
80 | /* Return true of the name in this hash entry is STR. */ | |
81 | bool is_name_eq (const char *str) const | |
82 | { | |
83 | return strcmp (m_name.get (), str) == 0; | |
84 | } | |
85 | ||
99f1bc6a AB |
86 | /* Return the hash value based on the name of the entry. */ |
87 | hashval_t hash_name () const | |
88 | { | |
89 | return htab_hash_string (m_name.get ()); | |
90 | } | |
91 | ||
724fd9ba AB |
92 | private: |
93 | ||
94 | /* The symbol name stored in this hash entry. */ | |
95 | gdb::unique_xmalloc_ptr<char> m_name; | |
96 | ||
97 | /* The lowest common denominator string computed for this hash entry. */ | |
98 | gdb::unique_xmalloc_ptr<char> m_lcd; | |
99 | }; | |
100 | ||
eb3ff9a5 PA |
101 | /* Misc state that needs to be tracked across several different |
102 | readline completer entry point calls, all related to a single | |
103 | completion invocation. */ | |
104 | ||
105 | struct gdb_completer_state | |
106 | { | |
107 | /* The current completion's completion tracker. This is a global | |
108 | because a tracker can be shared between the handle_brkchars and | |
109 | handle_completion phases, which involves different readline | |
110 | callbacks. */ | |
111 | completion_tracker *tracker = NULL; | |
112 | ||
113 | /* Whether the current completion was aborted. */ | |
114 | bool aborted = false; | |
115 | }; | |
116 | ||
117 | /* The current completion state. */ | |
118 | static gdb_completer_state current_completion; | |
119 | ||
c6756f62 PA |
120 | /* An enumeration of the various things a user might attempt to |
121 | complete for a location. If you change this, remember to update | |
122 | the explicit_options array below too. */ | |
87f0e720 KS |
123 | |
124 | enum explicit_location_match_type | |
125 | { | |
126 | /* The filename of a source file. */ | |
127 | MATCH_SOURCE, | |
128 | ||
129 | /* The name of a function or method. */ | |
130 | MATCH_FUNCTION, | |
131 | ||
a20714ff PA |
132 | /* The fully-qualified name of a function or method. */ |
133 | MATCH_QUALIFIED, | |
134 | ||
c6756f62 PA |
135 | /* A line number. */ |
136 | MATCH_LINE, | |
137 | ||
87f0e720 KS |
138 | /* The name of a label. */ |
139 | MATCH_LABEL | |
140 | }; | |
141 | ||
9c3f90bd | 142 | /* Prototypes for local functions. */ |
c5f0f3d0 FN |
143 | |
144 | /* readline uses the word breaks for two things: | |
145 | (1) In figuring out where to point the TEXT parameter to the | |
146 | rl_completion_entry_function. Since we don't use TEXT for much, | |
aff410f1 MS |
147 | it doesn't matter a lot what the word breaks are for this purpose, |
148 | but it does affect how much stuff M-? lists. | |
c5f0f3d0 FN |
149 | (2) If one of the matches contains a word break character, readline |
150 | will quote it. That's why we switch between | |
53fc67f8 | 151 | current_language->word_break_characters () and |
c5f0f3d0 | 152 | gdb_completer_command_word_break_characters. I'm not sure when |
aff410f1 MS |
153 | we need this behavior (perhaps for funky characters in C++ |
154 | symbols?). */ | |
c5f0f3d0 FN |
155 | |
156 | /* Variables which are necessary for fancy command line editing. */ | |
c5f0f3d0 | 157 | |
be09caf1 | 158 | /* When completing on command names, we remove '-' and '.' from the list of |
c5f0f3d0 FN |
159 | word break characters, since we use it in command names. If the |
160 | readline library sees one in any of the current completion strings, | |
aff410f1 MS |
161 | it thinks that the string needs to be quoted and automatically |
162 | supplies a leading quote. */ | |
67cb5b2d | 163 | static const char gdb_completer_command_word_break_characters[] = |
be09caf1 | 164 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/><,"; |
c5f0f3d0 FN |
165 | |
166 | /* When completing on file names, we remove from the list of word | |
167 | break characters any characters that are commonly used in file | |
168 | names, such as '-', '+', '~', etc. Otherwise, readline displays | |
169 | incorrect completion candidates. */ | |
7830cf6f EZ |
170 | /* MS-DOS and MS-Windows use colon as part of the drive spec, and most |
171 | programs support @foo style response files. */ | |
67cb5b2d PA |
172 | static const char gdb_completer_file_name_break_characters[] = |
173 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
174 | " \t\n*|\"';?><@"; | |
7830cf6f | 175 | #else |
67cb5b2d | 176 | " \t\n*|\"';:?><"; |
7830cf6f | 177 | #endif |
c5f0f3d0 | 178 | |
4f440ff3 AB |
179 | /* Characters that can be used to quote expressions. Note that we can't |
180 | include '"' (double quote) because the gdb C parser treats such quoted | |
aff410f1 | 181 | sequences as strings. */ |
4f440ff3 AB |
182 | static const char gdb_completer_expression_quote_characters[] = "'"; |
183 | ||
184 | /* Characters that can be used to quote file names. We do allow '"' | |
185 | (double quotes) in this set as file names are not passed through the C | |
186 | expression parser. */ | |
187 | static const char gdb_completer_file_name_quote_characters[] = "'\""; | |
c5f0f3d0 | 188 | \f |
c5f0f3d0 | 189 | |
aff410f1 MS |
190 | /* This can be used for functions which don't want to complete on |
191 | symbols but don't want to complete on anything else either. */ | |
eb3ff9a5 PA |
192 | |
193 | void | |
aff410f1 | 194 | noop_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 195 | completion_tracker &tracker, |
6f937416 | 196 | const char *text, const char *prefix) |
d75b5104 | 197 | { |
d75b5104 EZ |
198 | } |
199 | ||
c5f0f3d0 | 200 | /* Complete on filenames. */ |
6e1dbf8c | 201 | |
eb3ff9a5 PA |
202 | void |
203 | filename_completer (struct cmd_list_element *ignore, | |
204 | completion_tracker &tracker, | |
6f937416 | 205 | const char *text, const char *word) |
c5f0f3d0 | 206 | { |
4f440ff3 | 207 | rl_completer_quote_characters = gdb_completer_file_name_quote_characters; |
c5f0f3d0 | 208 | |
4f440ff3 | 209 | int subsequent_name = 0; |
c5f0f3d0 FN |
210 | while (1) |
211 | { | |
60a20c19 PA |
212 | gdb::unique_xmalloc_ptr<char> p_rl |
213 | (rl_filename_completion_function (text, subsequent_name)); | |
214 | if (p_rl == NULL) | |
49c4e619 | 215 | break; |
c5f0f3d0 | 216 | /* We need to set subsequent_name to a non-zero value before the |
aff410f1 MS |
217 | continue line below, because otherwise, if the first file |
218 | seen by GDB is a backup file whose name ends in a `~', we | |
219 | will loop indefinitely. */ | |
c5f0f3d0 | 220 | subsequent_name = 1; |
aff410f1 | 221 | /* Like emacs, don't complete on old versions. Especially |
dda83cd7 | 222 | useful in the "source" command. */ |
60a20c19 | 223 | const char *p = p_rl.get (); |
c5f0f3d0 | 224 | if (p[strlen (p) - 1] == '~') |
60a20c19 | 225 | continue; |
c5f0f3d0 | 226 | |
3b9ff5d9 AB |
227 | /* Readline appends a trailing '/' if the completion is a |
228 | directory. If this completion request originated from outside | |
229 | readline (e.g. GDB's 'complete' command), then we append the | |
230 | trailing '/' ourselves now. */ | |
231 | if (!tracker.from_readline ()) | |
232 | { | |
233 | std::string expanded = gdb_tilde_expand (p_rl.get ()); | |
234 | struct stat finfo; | |
235 | const bool isdir = (stat (expanded.c_str (), &finfo) == 0 | |
236 | && S_ISDIR (finfo.st_mode)); | |
237 | if (isdir) | |
238 | p_rl.reset (concat (p_rl.get (), "/", nullptr)); | |
239 | } | |
240 | ||
60a20c19 PA |
241 | tracker.add_completion |
242 | (make_completion_match_str (std::move (p_rl), text, word)); | |
c5f0f3d0 FN |
243 | } |
244 | #if 0 | |
aff410f1 MS |
245 | /* There is no way to do this just long enough to affect quote |
246 | inserting without also affecting the next completion. This | |
247 | should be fixed in readline. FIXME. */ | |
489f0516 | 248 | /* Ensure that readline does the right thing |
c5f0f3d0 FN |
249 | with respect to inserting quotes. */ |
250 | rl_completer_word_break_characters = ""; | |
251 | #endif | |
c5f0f3d0 FN |
252 | } |
253 | ||
6e1dbf8c PA |
254 | /* The corresponding completer_handle_brkchars |
255 | implementation. */ | |
256 | ||
257 | static void | |
258 | filename_completer_handle_brkchars (struct cmd_list_element *ignore, | |
eb3ff9a5 | 259 | completion_tracker &tracker, |
6e1dbf8c PA |
260 | const char *text, const char *word) |
261 | { | |
262 | set_rl_completer_word_break_characters | |
263 | (gdb_completer_file_name_break_characters); | |
4f440ff3 AB |
264 | |
265 | rl_completer_quote_characters = gdb_completer_file_name_quote_characters; | |
6e1dbf8c PA |
266 | } |
267 | ||
6a2c1b87 PA |
268 | /* Find the bounds of the current word for completion purposes, and |
269 | return a pointer to the end of the word. This mimics (and is a | |
270 | modified version of) readline's _rl_find_completion_word internal | |
271 | function. | |
272 | ||
273 | This function skips quoted substrings (characters between matched | |
274 | pairs of characters in rl_completer_quote_characters). We try to | |
275 | find an unclosed quoted substring on which to do matching. If one | |
276 | is not found, we use the word break characters to find the | |
277 | boundaries of the current word. QC, if non-null, is set to the | |
278 | opening quote character if we found an unclosed quoted substring, | |
279 | '\0' otherwise. DP, if non-null, is set to the value of the | |
280 | delimiter character that caused a word break. */ | |
281 | ||
282 | struct gdb_rl_completion_word_info | |
283 | { | |
284 | const char *word_break_characters; | |
285 | const char *quote_characters; | |
286 | const char *basic_quote_characters; | |
287 | }; | |
288 | ||
289 | static const char * | |
290 | gdb_rl_find_completion_word (struct gdb_rl_completion_word_info *info, | |
291 | int *qc, int *dp, | |
292 | const char *line_buffer) | |
293 | { | |
fa6ec8ef | 294 | int scan, end, delimiter, pass_next, isbrk; |
6a2c1b87 PA |
295 | char quote_char; |
296 | const char *brkchars; | |
297 | int point = strlen (line_buffer); | |
298 | ||
299 | /* The algorithm below does '--point'. Avoid buffer underflow with | |
300 | the empty string. */ | |
301 | if (point == 0) | |
302 | { | |
303 | if (qc != NULL) | |
304 | *qc = '\0'; | |
305 | if (dp != NULL) | |
306 | *dp = '\0'; | |
307 | return line_buffer; | |
308 | } | |
309 | ||
310 | end = point; | |
fa6ec8ef | 311 | delimiter = 0; |
6a2c1b87 PA |
312 | quote_char = '\0'; |
313 | ||
314 | brkchars = info->word_break_characters; | |
315 | ||
316 | if (info->quote_characters != NULL) | |
317 | { | |
318 | /* We have a list of characters which can be used in pairs to | |
319 | quote substrings for the completer. Try to find the start of | |
320 | an unclosed quoted substring. */ | |
6a2c1b87 PA |
321 | for (scan = pass_next = 0; |
322 | scan < end; | |
323 | scan++) | |
324 | { | |
325 | if (pass_next) | |
326 | { | |
327 | pass_next = 0; | |
328 | continue; | |
329 | } | |
330 | ||
331 | /* Shell-like semantics for single quotes -- don't allow | |
332 | backslash to quote anything in single quotes, especially | |
333 | not the closing quote. If you don't like this, take out | |
334 | the check on the value of quote_char. */ | |
335 | if (quote_char != '\'' && line_buffer[scan] == '\\') | |
336 | { | |
337 | pass_next = 1; | |
6a2c1b87 PA |
338 | continue; |
339 | } | |
340 | ||
341 | if (quote_char != '\0') | |
342 | { | |
343 | /* Ignore everything until the matching close quote | |
344 | char. */ | |
345 | if (line_buffer[scan] == quote_char) | |
346 | { | |
347 | /* Found matching close. Abandon this | |
348 | substring. */ | |
349 | quote_char = '\0'; | |
350 | point = end; | |
351 | } | |
352 | } | |
353 | else if (strchr (info->quote_characters, line_buffer[scan])) | |
354 | { | |
355 | /* Found start of a quoted substring. */ | |
356 | quote_char = line_buffer[scan]; | |
357 | point = scan + 1; | |
6a2c1b87 PA |
358 | } |
359 | } | |
360 | } | |
361 | ||
362 | if (point == end && quote_char == '\0') | |
363 | { | |
364 | /* We didn't find an unclosed quoted substring upon which to do | |
365 | completion, so use the word break characters to find the | |
366 | substring on which to complete. */ | |
367 | while (--point) | |
368 | { | |
369 | scan = line_buffer[point]; | |
370 | ||
371 | if (strchr (brkchars, scan) != 0) | |
372 | break; | |
373 | } | |
374 | } | |
375 | ||
376 | /* If we are at an unquoted word break, then advance past it. */ | |
377 | scan = line_buffer[point]; | |
378 | ||
379 | if (scan) | |
380 | { | |
381 | isbrk = strchr (brkchars, scan) != 0; | |
382 | ||
383 | if (isbrk) | |
384 | { | |
385 | /* If the character that caused the word break was a quoting | |
386 | character, then remember it as the delimiter. */ | |
387 | if (info->basic_quote_characters | |
388 | && strchr (info->basic_quote_characters, scan) | |
389 | && (end - point) > 1) | |
390 | delimiter = scan; | |
391 | ||
392 | point++; | |
393 | } | |
394 | } | |
395 | ||
396 | if (qc != NULL) | |
397 | *qc = quote_char; | |
398 | if (dp != NULL) | |
399 | *dp = delimiter; | |
400 | ||
401 | return line_buffer + point; | |
402 | } | |
403 | ||
e6ed716c PA |
404 | /* Find the completion word point for TEXT, emulating the algorithm |
405 | readline uses to find the word point, using WORD_BREAK_CHARACTERS | |
406 | as word break characters. */ | |
c6756f62 | 407 | |
e6ed716c PA |
408 | static const char * |
409 | advance_to_completion_word (completion_tracker &tracker, | |
410 | const char *word_break_characters, | |
4f440ff3 | 411 | const char *quote_characters, |
e6ed716c | 412 | const char *text) |
c6756f62 PA |
413 | { |
414 | gdb_rl_completion_word_info info; | |
415 | ||
e6ed716c | 416 | info.word_break_characters = word_break_characters; |
4f440ff3 | 417 | info.quote_characters = quote_characters; |
c6756f62 PA |
418 | info.basic_quote_characters = rl_basic_quote_characters; |
419 | ||
00b56dbe | 420 | int delimiter; |
c6756f62 | 421 | const char *start |
00b56dbe | 422 | = gdb_rl_find_completion_word (&info, NULL, &delimiter, text); |
c6756f62 PA |
423 | |
424 | tracker.advance_custom_word_point_by (start - text); | |
425 | ||
00b56dbe PA |
426 | if (delimiter) |
427 | { | |
428 | tracker.set_quote_char (delimiter); | |
429 | tracker.set_suppress_append_ws (true); | |
430 | } | |
431 | ||
c6756f62 PA |
432 | return start; |
433 | } | |
434 | ||
435 | /* See completer.h. */ | |
436 | ||
e6ed716c PA |
437 | const char * |
438 | advance_to_expression_complete_word_point (completion_tracker &tracker, | |
439 | const char *text) | |
440 | { | |
53fc67f8 | 441 | const char *brk_chars = current_language->word_break_characters (); |
4f440ff3 AB |
442 | const char *quote_chars = gdb_completer_expression_quote_characters; |
443 | return advance_to_completion_word (tracker, brk_chars, quote_chars, text); | |
e6ed716c PA |
444 | } |
445 | ||
446 | /* See completer.h. */ | |
447 | ||
448 | const char * | |
449 | advance_to_filename_complete_word_point (completion_tracker &tracker, | |
450 | const char *text) | |
451 | { | |
452 | const char *brk_chars = gdb_completer_file_name_break_characters; | |
4f440ff3 AB |
453 | const char *quote_chars = gdb_completer_file_name_quote_characters; |
454 | return advance_to_completion_word (tracker, brk_chars, quote_chars, text); | |
e6ed716c PA |
455 | } |
456 | ||
457 | /* See completer.h. */ | |
458 | ||
c6756f62 PA |
459 | bool |
460 | completion_tracker::completes_to_completion_word (const char *word) | |
461 | { | |
724fd9ba | 462 | recompute_lowest_common_denominator (); |
c6756f62 PA |
463 | if (m_lowest_common_denominator_unique) |
464 | { | |
465 | const char *lcd = m_lowest_common_denominator; | |
466 | ||
467 | if (strncmp_iw (word, lcd, strlen (lcd)) == 0) | |
468 | { | |
469 | /* Maybe skip the function and complete on keywords. */ | |
470 | size_t wordlen = strlen (word); | |
471 | if (word[wordlen - 1] == ' ') | |
472 | return true; | |
473 | } | |
474 | } | |
475 | ||
476 | return false; | |
477 | } | |
478 | ||
272d4594 PA |
479 | /* See completer.h. */ |
480 | ||
481 | void | |
482 | complete_nested_command_line (completion_tracker &tracker, const char *text) | |
483 | { | |
484 | /* Must be called from a custom-word-point completer. */ | |
485 | gdb_assert (tracker.use_custom_word_point ()); | |
486 | ||
487 | /* Disable the custom word point temporarily, because we want to | |
488 | probe whether the command we're completing itself uses a custom | |
489 | word point. */ | |
490 | tracker.set_use_custom_word_point (false); | |
491 | size_t save_custom_word_point = tracker.custom_word_point (); | |
492 | ||
493 | int quote_char = '\0'; | |
494 | const char *word = completion_find_completion_word (tracker, text, | |
495 | "e_char); | |
496 | ||
497 | if (tracker.use_custom_word_point ()) | |
498 | { | |
499 | /* The command we're completing uses a custom word point, so the | |
500 | tracker already contains the matches. We're done. */ | |
501 | return; | |
502 | } | |
503 | ||
504 | /* Restore the custom word point settings. */ | |
505 | tracker.set_custom_word_point (save_custom_word_point); | |
506 | tracker.set_use_custom_word_point (true); | |
507 | ||
508 | /* Run the handle_completions completer phase. */ | |
509 | complete_line (tracker, word, text, strlen (text)); | |
510 | } | |
511 | ||
87f0e720 | 512 | /* Complete on linespecs, which might be of two possible forms: |
c94fdfd0 EZ |
513 | |
514 | file:line | |
515 | or | |
516 | symbol+offset | |
517 | ||
aff410f1 MS |
518 | This is intended to be used in commands that set breakpoints |
519 | etc. */ | |
520 | ||
eb3ff9a5 PA |
521 | static void |
522 | complete_files_symbols (completion_tracker &tracker, | |
523 | const char *text, const char *word) | |
c94fdfd0 | 524 | { |
eb3ff9a5 | 525 | completion_list fn_list; |
6f937416 | 526 | const char *p; |
c94fdfd0 EZ |
527 | int quote_found = 0; |
528 | int quoted = *text == '\'' || *text == '"'; | |
529 | int quote_char = '\0'; | |
6f937416 | 530 | const char *colon = NULL; |
c94fdfd0 | 531 | char *file_to_match = NULL; |
6f937416 PA |
532 | const char *symbol_start = text; |
533 | const char *orig_text = text; | |
c94fdfd0 | 534 | |
59be2b6a | 535 | /* Do we have an unquoted colon, as in "break foo.c:bar"? */ |
c94fdfd0 EZ |
536 | for (p = text; *p != '\0'; ++p) |
537 | { | |
538 | if (*p == '\\' && p[1] == '\'') | |
539 | p++; | |
540 | else if (*p == '\'' || *p == '"') | |
541 | { | |
542 | quote_found = *p; | |
543 | quote_char = *p++; | |
544 | while (*p != '\0' && *p != quote_found) | |
545 | { | |
546 | if (*p == '\\' && p[1] == quote_found) | |
547 | p++; | |
548 | p++; | |
549 | } | |
550 | ||
551 | if (*p == quote_found) | |
552 | quote_found = 0; | |
553 | else | |
9c3f90bd | 554 | break; /* Hit the end of text. */ |
c94fdfd0 EZ |
555 | } |
556 | #if HAVE_DOS_BASED_FILE_SYSTEM | |
557 | /* If we have a DOS-style absolute file name at the beginning of | |
558 | TEXT, and the colon after the drive letter is the only colon | |
559 | we found, pretend the colon is not there. */ | |
560 | else if (p < text + 3 && *p == ':' && p == text + 1 + quoted) | |
561 | ; | |
562 | #endif | |
563 | else if (*p == ':' && !colon) | |
564 | { | |
565 | colon = p; | |
566 | symbol_start = p + 1; | |
567 | } | |
53fc67f8 | 568 | else if (strchr (current_language->word_break_characters (), *p)) |
c94fdfd0 EZ |
569 | symbol_start = p + 1; |
570 | } | |
571 | ||
572 | if (quoted) | |
573 | text++; | |
c94fdfd0 EZ |
574 | |
575 | /* Where is the file name? */ | |
576 | if (colon) | |
577 | { | |
578 | char *s; | |
579 | ||
580 | file_to_match = (char *) xmalloc (colon - text + 1); | |
bbfa2517 YQ |
581 | strncpy (file_to_match, text, colon - text); |
582 | file_to_match[colon - text] = '\0'; | |
c94fdfd0 EZ |
583 | /* Remove trailing colons and quotes from the file name. */ |
584 | for (s = file_to_match + (colon - text); | |
585 | s > file_to_match; | |
586 | s--) | |
587 | if (*s == ':' || *s == quote_char) | |
588 | *s = '\0'; | |
589 | } | |
590 | /* If the text includes a colon, they want completion only on a | |
591 | symbol name after the colon. Otherwise, we need to complete on | |
592 | symbols as well as on files. */ | |
593 | if (colon) | |
594 | { | |
c6756f62 PA |
595 | collect_file_symbol_completion_matches (tracker, |
596 | complete_symbol_mode::EXPRESSION, | |
b5ec771e | 597 | symbol_name_match_type::EXPRESSION, |
c6756f62 | 598 | symbol_start, word, |
eb3ff9a5 | 599 | file_to_match); |
c94fdfd0 EZ |
600 | xfree (file_to_match); |
601 | } | |
602 | else | |
603 | { | |
eb3ff9a5 PA |
604 | size_t text_len = strlen (text); |
605 | ||
c6756f62 PA |
606 | collect_symbol_completion_matches (tracker, |
607 | complete_symbol_mode::EXPRESSION, | |
b5ec771e | 608 | symbol_name_match_type::EXPRESSION, |
c6756f62 | 609 | symbol_start, word); |
c94fdfd0 EZ |
610 | /* If text includes characters which cannot appear in a file |
611 | name, they cannot be asking for completion on files. */ | |
eb3ff9a5 | 612 | if (strcspn (text, |
1f20ed91 | 613 | gdb_completer_file_name_break_characters) == text_len) |
c94fdfd0 EZ |
614 | fn_list = make_source_files_completion_list (text, text); |
615 | } | |
616 | ||
eb3ff9a5 | 617 | if (!fn_list.empty () && !tracker.have_completions ()) |
c94fdfd0 EZ |
618 | { |
619 | /* If we only have file names as possible completion, we should | |
620 | bring them in sync with what rl_complete expects. The | |
621 | problem is that if the user types "break /foo/b TAB", and the | |
622 | possible completions are "/foo/bar" and "/foo/baz" | |
623 | rl_complete expects us to return "bar" and "baz", without the | |
624 | leading directories, as possible completions, because `word' | |
625 | starts at the "b". But we ignore the value of `word' when we | |
626 | call make_source_files_completion_list above (because that | |
627 | would not DTRT when the completion results in both symbols | |
628 | and file names), so make_source_files_completion_list returns | |
629 | the full "/foo/bar" and "/foo/baz" strings. This produces | |
630 | wrong results when, e.g., there's only one possible | |
631 | completion, because rl_complete will prepend "/foo/" to each | |
632 | candidate completion. The loop below removes that leading | |
633 | part. */ | |
eb3ff9a5 | 634 | for (const auto &fn_up: fn_list) |
c94fdfd0 | 635 | { |
eb3ff9a5 PA |
636 | char *fn = fn_up.get (); |
637 | memmove (fn, fn + (word - text), strlen (fn) + 1 - (word - text)); | |
c94fdfd0 | 638 | } |
c94fdfd0 | 639 | } |
eb3ff9a5 PA |
640 | |
641 | tracker.add_completions (std::move (fn_list)); | |
642 | ||
643 | if (!tracker.have_completions ()) | |
c94fdfd0 EZ |
644 | { |
645 | /* No completions at all. As the final resort, try completing | |
646 | on the entire text as a symbol. */ | |
eb3ff9a5 | 647 | collect_symbol_completion_matches (tracker, |
c6756f62 | 648 | complete_symbol_mode::EXPRESSION, |
b5ec771e | 649 | symbol_name_match_type::EXPRESSION, |
eb3ff9a5 | 650 | orig_text, word); |
c94fdfd0 | 651 | } |
eb3ff9a5 PA |
652 | } |
653 | ||
c45ec17c PA |
654 | /* See completer.h. */ |
655 | ||
656 | completion_list | |
657 | complete_source_filenames (const char *text) | |
658 | { | |
659 | size_t text_len = strlen (text); | |
660 | ||
661 | /* If text includes characters which cannot appear in a file name, | |
662 | the user cannot be asking for completion on files. */ | |
663 | if (strcspn (text, | |
664 | gdb_completer_file_name_break_characters) | |
665 | == text_len) | |
666 | return make_source_files_completion_list (text, text); | |
667 | ||
668 | return {}; | |
669 | } | |
670 | ||
671 | /* Complete address and linespec locations. */ | |
672 | ||
673 | static void | |
674 | complete_address_and_linespec_locations (completion_tracker &tracker, | |
a20714ff PA |
675 | const char *text, |
676 | symbol_name_match_type match_type) | |
c45ec17c PA |
677 | { |
678 | if (*text == '*') | |
679 | { | |
680 | tracker.advance_custom_word_point_by (1); | |
681 | text++; | |
682 | const char *word | |
683 | = advance_to_expression_complete_word_point (tracker, text); | |
684 | complete_expression (tracker, text, word); | |
685 | } | |
686 | else | |
687 | { | |
a20714ff | 688 | linespec_complete (tracker, text, match_type); |
c45ec17c PA |
689 | } |
690 | } | |
691 | ||
c6756f62 PA |
692 | /* The explicit location options. Note that indexes into this array |
693 | must match the explicit_location_match_type enumerators. */ | |
c45ec17c | 694 | |
c6756f62 PA |
695 | static const char *const explicit_options[] = |
696 | { | |
697 | "-source", | |
698 | "-function", | |
a20714ff | 699 | "-qualified", |
c6756f62 PA |
700 | "-line", |
701 | "-label", | |
702 | NULL | |
703 | }; | |
704 | ||
705 | /* The probe modifier options. These can appear before a location in | |
706 | breakpoint commands. */ | |
707 | static const char *const probe_options[] = | |
708 | { | |
709 | "-probe", | |
710 | "-probe-stap", | |
711 | "-probe-dtrace", | |
712 | NULL | |
713 | }; | |
714 | ||
eb3ff9a5 | 715 | /* Returns STRING if not NULL, the empty string otherwise. */ |
c94fdfd0 | 716 | |
eb3ff9a5 PA |
717 | static const char * |
718 | string_or_empty (const char *string) | |
719 | { | |
720 | return string != NULL ? string : ""; | |
c94fdfd0 EZ |
721 | } |
722 | ||
87f0e720 KS |
723 | /* A helper function to collect explicit location matches for the given |
724 | LOCATION, which is attempting to match on WORD. */ | |
725 | ||
eb3ff9a5 PA |
726 | static void |
727 | collect_explicit_location_matches (completion_tracker &tracker, | |
264f9890 | 728 | location_spec *locspec, |
87f0e720 | 729 | enum explicit_location_match_type what, |
c6756f62 PA |
730 | const char *word, |
731 | const struct language_defn *language) | |
87f0e720 | 732 | { |
40d97ee2 PA |
733 | const explicit_location_spec *explicit_loc |
734 | = as_explicit_location_spec (locspec); | |
87f0e720 | 735 | |
a20714ff PA |
736 | /* True if the option expects an argument. */ |
737 | bool needs_arg = true; | |
738 | ||
c6756f62 PA |
739 | /* Note, in the various MATCH_* below, we complete on |
740 | explicit_loc->foo instead of WORD, because only the former will | |
741 | have already skipped past any quote char. */ | |
87f0e720 KS |
742 | switch (what) |
743 | { | |
744 | case MATCH_SOURCE: | |
745 | { | |
fde84194 TT |
746 | const char *source |
747 | = string_or_empty (explicit_loc->source_filename.get ()); | |
eb3ff9a5 | 748 | completion_list matches |
c6756f62 | 749 | = make_source_files_completion_list (source, source); |
eb3ff9a5 | 750 | tracker.add_completions (std::move (matches)); |
87f0e720 KS |
751 | } |
752 | break; | |
753 | ||
754 | case MATCH_FUNCTION: | |
755 | { | |
fde84194 TT |
756 | const char *function |
757 | = string_or_empty (explicit_loc->function_name.get ()); | |
c6756f62 | 758 | linespec_complete_function (tracker, function, |
a20714ff | 759 | explicit_loc->func_name_match_type, |
fde84194 | 760 | explicit_loc->source_filename.get ()); |
87f0e720 KS |
761 | } |
762 | break; | |
763 | ||
a20714ff PA |
764 | case MATCH_QUALIFIED: |
765 | needs_arg = false; | |
766 | break; | |
c6756f62 PA |
767 | case MATCH_LINE: |
768 | /* Nothing to offer. */ | |
769 | break; | |
770 | ||
87f0e720 | 771 | case MATCH_LABEL: |
a2459270 | 772 | { |
fde84194 | 773 | const char *label = string_or_empty (explicit_loc->label_name.get ()); |
a2459270 | 774 | linespec_complete_label (tracker, language, |
fde84194 TT |
775 | explicit_loc->source_filename.get (), |
776 | explicit_loc->function_name.get (), | |
a20714ff | 777 | explicit_loc->func_name_match_type, |
a2459270 PA |
778 | label); |
779 | } | |
87f0e720 KS |
780 | break; |
781 | ||
782 | default: | |
783 | gdb_assert_not_reached ("unhandled explicit_location_match_type"); | |
784 | } | |
c6756f62 | 785 | |
a20714ff | 786 | if (!needs_arg || tracker.completes_to_completion_word (word)) |
c6756f62 PA |
787 | { |
788 | tracker.discard_completions (); | |
789 | tracker.advance_custom_word_point_by (strlen (word)); | |
790 | complete_on_enum (tracker, explicit_options, "", ""); | |
791 | complete_on_enum (tracker, linespec_keywords, "", ""); | |
792 | } | |
793 | else if (!tracker.have_completions ()) | |
794 | { | |
795 | /* Maybe we have an unterminated linespec keyword at the tail of | |
796 | the string. Try completing on that. */ | |
797 | size_t wordlen = strlen (word); | |
798 | const char *keyword = word + wordlen; | |
799 | ||
800 | if (wordlen > 0 && keyword[-1] != ' ') | |
801 | { | |
802 | while (keyword > word && *keyword != ' ') | |
803 | keyword--; | |
804 | /* Don't complete on keywords if we'd be completing on the | |
805 | whole explicit linespec option. E.g., "b -function | |
806 | thr<tab>" should not complete to the "thread" | |
807 | keyword. */ | |
808 | if (keyword != word) | |
809 | { | |
f1735a53 | 810 | keyword = skip_spaces (keyword); |
c6756f62 PA |
811 | |
812 | tracker.advance_custom_word_point_by (keyword - word); | |
813 | complete_on_enum (tracker, linespec_keywords, keyword, keyword); | |
814 | } | |
815 | } | |
816 | else if (wordlen > 0 && keyword[-1] == ' ') | |
817 | { | |
818 | /* Assume that we're maybe past the explicit location | |
819 | argument, and we didn't manage to find any match because | |
820 | the user wants to create a pending breakpoint. Offer the | |
821 | keyword and explicit location options as possible | |
822 | completions. */ | |
823 | tracker.advance_custom_word_point_by (keyword - word); | |
824 | complete_on_enum (tracker, linespec_keywords, keyword, keyword); | |
825 | complete_on_enum (tracker, explicit_options, keyword, keyword); | |
826 | } | |
827 | } | |
87f0e720 KS |
828 | } |
829 | ||
c6756f62 PA |
830 | /* If the next word in *TEXT_P is any of the keywords in KEYWORDS, |
831 | then advance both TEXT_P and the word point in the tracker past the | |
832 | keyword and return the (0-based) index in the KEYWORDS array that | |
833 | matched. Otherwise, return -1. */ | |
87f0e720 | 834 | |
c6756f62 PA |
835 | static int |
836 | skip_keyword (completion_tracker &tracker, | |
837 | const char * const *keywords, const char **text_p) | |
87f0e720 | 838 | { |
c6756f62 | 839 | const char *text = *text_p; |
f1735a53 | 840 | const char *after = skip_to_space (text); |
c6756f62 | 841 | size_t len = after - text; |
87f0e720 | 842 | |
c6756f62 PA |
843 | if (text[len] != ' ') |
844 | return -1; | |
845 | ||
846 | int found = -1; | |
847 | for (int i = 0; keywords[i] != NULL; i++) | |
848 | { | |
849 | if (strncmp (keywords[i], text, len) == 0) | |
850 | { | |
851 | if (found == -1) | |
852 | found = i; | |
853 | else | |
854 | return -1; | |
855 | } | |
856 | } | |
857 | ||
858 | if (found != -1) | |
859 | { | |
860 | tracker.advance_custom_word_point_by (len + 1); | |
861 | text += len + 1; | |
862 | *text_p = text; | |
863 | return found; | |
864 | } | |
865 | ||
866 | return -1; | |
87f0e720 KS |
867 | } |
868 | ||
264f9890 | 869 | /* A completer function for explicit location specs. This function |
c6756f62 PA |
870 | completes both options ("-source", "-line", etc) and values. If |
871 | completing a quoted string, then QUOTED_ARG_START and | |
872 | QUOTED_ARG_END point to the quote characters. LANGUAGE is the | |
873 | current language. */ | |
87f0e720 | 874 | |
eb3ff9a5 | 875 | static void |
264f9890 PA |
876 | complete_explicit_location_spec (completion_tracker &tracker, |
877 | location_spec *locspec, | |
878 | const char *text, | |
879 | const language_defn *language, | |
880 | const char *quoted_arg_start, | |
881 | const char *quoted_arg_end) | |
87f0e720 | 882 | { |
c6756f62 PA |
883 | if (*text != '-') |
884 | return; | |
87f0e720 | 885 | |
c6756f62 | 886 | int keyword = skip_keyword (tracker, explicit_options, &text); |
87f0e720 | 887 | |
c6756f62 | 888 | if (keyword == -1) |
1f58f6c2 TBA |
889 | { |
890 | complete_on_enum (tracker, explicit_options, text, text); | |
891 | /* There are keywords that start with "-". Include them, too. */ | |
892 | complete_on_enum (tracker, linespec_keywords, text, text); | |
893 | } | |
c6756f62 | 894 | else |
87f0e720 | 895 | { |
c6756f62 PA |
896 | /* Completing on value. */ |
897 | enum explicit_location_match_type what | |
898 | = (explicit_location_match_type) keyword; | |
899 | ||
900 | if (quoted_arg_start != NULL && quoted_arg_end != NULL) | |
87f0e720 | 901 | { |
c6756f62 PA |
902 | if (quoted_arg_end[1] == '\0') |
903 | { | |
904 | /* If completing a quoted string with the cursor right | |
905 | at the terminating quote char, complete the | |
906 | completion word without interpretation, so that | |
907 | readline advances the cursor one whitespace past the | |
908 | quote, even if there's no match. This makes these | |
909 | cases behave the same: | |
910 | ||
911 | before: "b -function function()" | |
912 | after: "b -function function() " | |
913 | ||
914 | before: "b -function 'function()'" | |
915 | after: "b -function 'function()' " | |
916 | ||
917 | and trusts the user in this case: | |
918 | ||
919 | before: "b -function 'not_loaded_function_yet()'" | |
920 | after: "b -function 'not_loaded_function_yet()' " | |
921 | */ | |
b02f78f9 | 922 | tracker.add_completion (make_unique_xstrdup (text)); |
c6756f62 PA |
923 | } |
924 | else if (quoted_arg_end[1] == ' ') | |
925 | { | |
926 | /* We're maybe past the explicit location argument. | |
30baf67b | 927 | Skip the argument without interpretation, assuming the |
c6756f62 PA |
928 | user may want to create pending breakpoint. Offer |
929 | the keyword and explicit location options as possible | |
930 | completions. */ | |
931 | tracker.advance_custom_word_point_by (strlen (text)); | |
932 | complete_on_enum (tracker, linespec_keywords, "", ""); | |
933 | complete_on_enum (tracker, explicit_options, "", ""); | |
934 | } | |
935 | return; | |
936 | } | |
937 | ||
938 | /* Now gather matches */ | |
264f9890 | 939 | collect_explicit_location_matches (tracker, locspec, what, text, |
c6756f62 PA |
940 | language); |
941 | } | |
942 | } | |
87f0e720 | 943 | |
c6756f62 | 944 | /* A completer for locations. */ |
87f0e720 | 945 | |
c6756f62 PA |
946 | void |
947 | location_completer (struct cmd_list_element *ignore, | |
948 | completion_tracker &tracker, | |
c45ec17c | 949 | const char *text, const char * /* word */) |
c6756f62 PA |
950 | { |
951 | int found_probe_option = -1; | |
952 | ||
953 | /* If we have a probe modifier, skip it. This can only appear as | |
954 | first argument. Until we have a specific completer for probes, | |
955 | falling back to the linespec completer for the remainder of the | |
956 | line is better than nothing. */ | |
957 | if (text[0] == '-' && text[1] == 'p') | |
958 | found_probe_option = skip_keyword (tracker, probe_options, &text); | |
959 | ||
960 | const char *option_text = text; | |
961 | int saved_word_point = tracker.custom_word_point (); | |
962 | ||
963 | const char *copy = text; | |
964 | ||
965 | explicit_completion_info completion_info; | |
264f9890 PA |
966 | location_spec_up locspec |
967 | = string_to_explicit_location_spec (©, current_language, | |
968 | &completion_info); | |
c6756f62 PA |
969 | if (completion_info.quoted_arg_start != NULL |
970 | && completion_info.quoted_arg_end == NULL) | |
971 | { | |
972 | /* Found an unbalanced quote. */ | |
973 | tracker.set_quote_char (*completion_info.quoted_arg_start); | |
974 | tracker.advance_custom_word_point_by (1); | |
87f0e720 | 975 | } |
c6756f62 | 976 | |
264f9890 | 977 | if (completion_info.saw_explicit_location_spec_option) |
87f0e720 | 978 | { |
c6756f62 | 979 | if (*copy != '\0') |
87f0e720 | 980 | { |
c6756f62 PA |
981 | tracker.advance_custom_word_point_by (copy - text); |
982 | text = copy; | |
983 | ||
984 | /* We found a terminator at the tail end of the string, | |
985 | which means we're past the explicit location options. We | |
986 | may have a keyword to complete on. If we have a whole | |
987 | keyword, then complete whatever comes after as an | |
988 | expression. This is mainly for the "if" keyword. If the | |
989 | "thread" and "task" keywords gain their own completers, | |
990 | they should be used here. */ | |
991 | int keyword = skip_keyword (tracker, linespec_keywords, &text); | |
992 | ||
993 | if (keyword == -1) | |
994 | { | |
995 | complete_on_enum (tracker, linespec_keywords, text, text); | |
996 | } | |
997 | else | |
998 | { | |
999 | const char *word | |
1000 | = advance_to_expression_complete_word_point (tracker, text); | |
1001 | complete_expression (tracker, text, word); | |
1002 | } | |
87f0e720 | 1003 | } |
c6756f62 | 1004 | else |
87f0e720 | 1005 | { |
c6756f62 PA |
1006 | tracker.advance_custom_word_point_by (completion_info.last_option |
1007 | - text); | |
1008 | text = completion_info.last_option; | |
1009 | ||
264f9890 PA |
1010 | complete_explicit_location_spec (tracker, locspec.get (), text, |
1011 | current_language, | |
1012 | completion_info.quoted_arg_start, | |
1013 | completion_info.quoted_arg_end); | |
c6756f62 | 1014 | |
87f0e720 | 1015 | } |
c6756f62 | 1016 | } |
a20714ff | 1017 | /* This is an address or linespec location. */ |
264f9890 | 1018 | else if (locspec != nullptr) |
a20714ff PA |
1019 | { |
1020 | /* Handle non-explicit location options. */ | |
1021 | ||
1022 | int keyword = skip_keyword (tracker, explicit_options, &text); | |
1023 | if (keyword == -1) | |
1024 | complete_on_enum (tracker, explicit_options, text, text); | |
1025 | else | |
1026 | { | |
1027 | tracker.advance_custom_word_point_by (copy - text); | |
1028 | text = copy; | |
1029 | ||
1030 | symbol_name_match_type match_type | |
40d97ee2 | 1031 | = as_explicit_location_spec (locspec.get ())->func_name_match_type; |
a20714ff PA |
1032 | complete_address_and_linespec_locations (tracker, text, match_type); |
1033 | } | |
1034 | } | |
c6756f62 PA |
1035 | else |
1036 | { | |
a20714ff PA |
1037 | /* No options. */ |
1038 | complete_address_and_linespec_locations (tracker, text, | |
1039 | symbol_name_match_type::WILD); | |
c6756f62 | 1040 | } |
87f0e720 | 1041 | |
c6756f62 | 1042 | /* Add matches for option names, if either: |
87f0e720 | 1043 | |
c6756f62 PA |
1044 | - Some completer above found some matches, but the word point did |
1045 | not advance (e.g., "b <tab>" finds all functions, or "b -<tab>" | |
1046 | matches all objc selectors), or; | |
1047 | ||
1048 | - Some completer above advanced the word point, but found no | |
1049 | matches. | |
1050 | */ | |
1051 | if ((text[0] == '-' || text[0] == '\0') | |
1052 | && (!tracker.have_completions () | |
1053 | || tracker.custom_word_point () == saved_word_point)) | |
1054 | { | |
1055 | tracker.set_custom_word_point (saved_word_point); | |
1056 | text = option_text; | |
1057 | ||
1058 | if (found_probe_option == -1) | |
1059 | complete_on_enum (tracker, probe_options, text, text); | |
1060 | complete_on_enum (tracker, explicit_options, text, text); | |
87f0e720 | 1061 | } |
87f0e720 KS |
1062 | } |
1063 | ||
c6756f62 PA |
1064 | /* The corresponding completer_handle_brkchars |
1065 | implementation. */ | |
87f0e720 | 1066 | |
c6756f62 PA |
1067 | static void |
1068 | location_completer_handle_brkchars (struct cmd_list_element *ignore, | |
1069 | completion_tracker &tracker, | |
1070 | const char *text, | |
1071 | const char *word_ignored) | |
87f0e720 | 1072 | { |
c6756f62 | 1073 | tracker.set_use_custom_word_point (true); |
87f0e720 | 1074 | |
c6756f62 | 1075 | location_completer (ignore, tracker, text, NULL); |
87f0e720 KS |
1076 | } |
1077 | ||
c45ec17c | 1078 | /* See completer.h. */ |
eb3ff9a5 | 1079 | |
c45ec17c | 1080 | void |
eb3ff9a5 PA |
1081 | complete_expression (completion_tracker &tracker, |
1082 | const char *text, const char *word) | |
65d12d83 | 1083 | { |
1e237aba TT |
1084 | expression_up exp; |
1085 | std::unique_ptr<expr_completion_base> expr_completer; | |
65d12d83 TT |
1086 | |
1087 | /* Perform a tentative parse of the expression, to see whether a | |
1088 | field completion is required. */ | |
a70b8144 | 1089 | try |
c92817ce | 1090 | { |
1e237aba | 1091 | exp = parse_expression_for_completion (text, &expr_completer); |
c92817ce | 1092 | } |
230d2906 | 1093 | catch (const gdb_exception_error &except) |
492d29ea | 1094 | { |
eb3ff9a5 | 1095 | return; |
492d29ea | 1096 | } |
492d29ea | 1097 | |
1e237aba TT |
1098 | /* Part of the parse_expression_for_completion contract. */ |
1099 | gdb_assert ((exp == nullptr) == (expr_completer == nullptr)); | |
1100 | if (expr_completer != nullptr | |
1101 | && expr_completer->complete (exp.get (), tracker)) | |
1102 | return; | |
65d12d83 | 1103 | |
eb3ff9a5 PA |
1104 | complete_files_symbols (tracker, text, word); |
1105 | } | |
1106 | ||
1107 | /* Complete on expressions. Often this means completing on symbol | |
1108 | names, but some language parsers also have support for completing | |
1109 | field names. */ | |
1110 | ||
1111 | void | |
1112 | expression_completer (struct cmd_list_element *ignore, | |
1113 | completion_tracker &tracker, | |
1114 | const char *text, const char *word) | |
1115 | { | |
1116 | complete_expression (tracker, text, word); | |
65d12d83 TT |
1117 | } |
1118 | ||
7d793aa9 SDJ |
1119 | /* See definition in completer.h. */ |
1120 | ||
67cb5b2d PA |
1121 | void |
1122 | set_rl_completer_word_break_characters (const char *break_chars) | |
1123 | { | |
1124 | rl_completer_word_break_characters = (char *) break_chars; | |
1125 | } | |
1126 | ||
78b13106 PA |
1127 | /* Complete on symbols. */ |
1128 | ||
eb3ff9a5 | 1129 | void |
78b13106 | 1130 | symbol_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1131 | completion_tracker &tracker, |
78b13106 PA |
1132 | const char *text, const char *word) |
1133 | { | |
c6756f62 | 1134 | collect_symbol_completion_matches (tracker, complete_symbol_mode::EXPRESSION, |
b5ec771e | 1135 | symbol_name_match_type::EXPRESSION, |
c6756f62 | 1136 | text, word); |
78b13106 PA |
1137 | } |
1138 | ||
aff410f1 MS |
1139 | /* Here are some useful test cases for completion. FIXME: These |
1140 | should be put in the test suite. They should be tested with both | |
1141 | M-? and TAB. | |
c5f0f3d0 FN |
1142 | |
1143 | "show output-" "radix" | |
1144 | "show output" "-radix" | |
1145 | "p" ambiguous (commands starting with p--path, print, printf, etc.) | |
1146 | "p " ambiguous (all symbols) | |
1147 | "info t foo" no completions | |
1148 | "info t " no completions | |
1149 | "info t" ambiguous ("info target", "info terminal", etc.) | |
1150 | "info ajksdlfk" no completions | |
1151 | "info ajksdlfk " no completions | |
1152 | "info" " " | |
1153 | "info " ambiguous (all info commands) | |
1154 | "p \"a" no completions (string constant) | |
1155 | "p 'a" ambiguous (all symbols starting with a) | |
1156 | "p b-a" ambiguous (all symbols starting with a) | |
1157 | "p b-" ambiguous (all symbols) | |
1158 | "file Make" "file" (word break hard to screw up here) | |
1159 | "file ../gdb.stabs/we" "ird" (needs to not break word at slash) | |
1160 | */ | |
1161 | ||
eb3ff9a5 | 1162 | enum complete_line_internal_reason |
67c296a2 | 1163 | { |
eb3ff9a5 | 1164 | /* Preliminary phase, called by gdb_completion_word_break_characters |
c6756f62 PA |
1165 | function, is used to either: |
1166 | ||
1167 | #1 - Determine the set of chars that are word delimiters | |
1168 | depending on the current command in line_buffer. | |
1169 | ||
1170 | #2 - Manually advance RL_POINT to the "word break" point instead | |
1171 | of letting readline do it (based on too-simple character | |
1172 | matching). | |
1173 | ||
1174 | Simpler completers that just pass a brkchars array to readline | |
1175 | (#1 above) must defer generating the completions to the main | |
1176 | phase (below). No completion list should be generated in this | |
1177 | phase. | |
1178 | ||
1179 | OTOH, completers that manually advance the word point(#2 above) | |
1180 | must set "use_custom_word_point" in the tracker and generate | |
1181 | their completion in this phase. Note that this is the convenient | |
1182 | thing to do since they'll be parsing the input line anyway. */ | |
67c296a2 | 1183 | handle_brkchars, |
eb3ff9a5 PA |
1184 | |
1185 | /* Main phase, called by complete_line function, is used to get the | |
1186 | list of possible completions. */ | |
67c296a2 | 1187 | handle_completions, |
eb3ff9a5 PA |
1188 | |
1189 | /* Special case when completing a 'help' command. In this case, | |
1190 | once sub-command completions are exhausted, we simply return | |
1191 | NULL. */ | |
1192 | handle_help, | |
1193 | }; | |
67c296a2 | 1194 | |
6e1dbf8c PA |
1195 | /* Helper for complete_line_internal to simplify it. */ |
1196 | ||
eb3ff9a5 PA |
1197 | static void |
1198 | complete_line_internal_normal_command (completion_tracker &tracker, | |
1199 | const char *command, const char *word, | |
6e1dbf8c PA |
1200 | const char *cmd_args, |
1201 | complete_line_internal_reason reason, | |
1202 | struct cmd_list_element *c) | |
1203 | { | |
1204 | const char *p = cmd_args; | |
1205 | ||
1206 | if (c->completer == filename_completer) | |
1207 | { | |
1208 | /* Many commands which want to complete on file names accept | |
1209 | several file names, as in "run foo bar >>baz". So we don't | |
1210 | want to complete the entire text after the command, just the | |
1211 | last word. To this end, we need to find the beginning of the | |
1212 | file name by starting at `word' and going backwards. */ | |
1213 | for (p = word; | |
1214 | p > command | |
1215 | && strchr (gdb_completer_file_name_break_characters, | |
1216 | p[-1]) == NULL; | |
1217 | p--) | |
1218 | ; | |
1219 | } | |
1220 | ||
1221 | if (reason == handle_brkchars) | |
1222 | { | |
1223 | completer_handle_brkchars_ftype *brkchars_fn; | |
1224 | ||
1225 | if (c->completer_handle_brkchars != NULL) | |
1226 | brkchars_fn = c->completer_handle_brkchars; | |
1227 | else | |
1228 | { | |
1229 | brkchars_fn | |
1230 | = (completer_handle_brkchars_func_for_completer | |
1231 | (c->completer)); | |
1232 | } | |
1233 | ||
eb3ff9a5 | 1234 | brkchars_fn (c, tracker, p, word); |
6e1dbf8c PA |
1235 | } |
1236 | ||
1237 | if (reason != handle_brkchars && c->completer != NULL) | |
eb3ff9a5 | 1238 | (*c->completer) (c, tracker, p, word); |
6e1dbf8c | 1239 | } |
67c296a2 PM |
1240 | |
1241 | /* Internal function used to handle completions. | |
1242 | ||
c5f0f3d0 FN |
1243 | |
1244 | TEXT is the caller's idea of the "word" we are looking at. | |
1245 | ||
aff410f1 MS |
1246 | LINE_BUFFER is available to be looked at; it contains the entire |
1247 | text of the line. POINT is the offset in that line of the cursor. | |
1248 | You should pretend that the line ends at POINT. | |
67c296a2 | 1249 | |
eb3ff9a5 | 1250 | See complete_line_internal_reason for description of REASON. */ |
14032a66 | 1251 | |
eb3ff9a5 PA |
1252 | static void |
1253 | complete_line_internal_1 (completion_tracker &tracker, | |
1254 | const char *text, | |
1255 | const char *line_buffer, int point, | |
1256 | complete_line_internal_reason reason) | |
c5f0f3d0 | 1257 | { |
6f937416 PA |
1258 | char *tmp_command; |
1259 | const char *p; | |
ace21957 | 1260 | int ignore_help_classes; |
c5f0f3d0 | 1261 | /* Pointer within tmp_command which corresponds to text. */ |
eb3ff9a5 | 1262 | const char *word; |
c5f0f3d0 FN |
1263 | struct cmd_list_element *c, *result_list; |
1264 | ||
aff410f1 MS |
1265 | /* Choose the default set of word break characters to break |
1266 | completions. If we later find out that we are doing completions | |
1267 | on command strings (as opposed to strings supplied by the | |
1268 | individual command completer functions, which can be any string) | |
1269 | then we will switch to the special word break set for command | |
be09caf1 | 1270 | strings, which leaves out the '-' and '.' character used in some |
aff410f1 | 1271 | commands. */ |
67cb5b2d | 1272 | set_rl_completer_word_break_characters |
53fc67f8 | 1273 | (current_language->word_break_characters ()); |
c5f0f3d0 | 1274 | |
4f440ff3 AB |
1275 | /* Likewise for the quote characters. If we later find out that we are |
1276 | completing file names then we can switch to the file name quote | |
1277 | character set (i.e., both single- and double-quotes). */ | |
1278 | rl_completer_quote_characters = gdb_completer_expression_quote_characters; | |
5792be92 | 1279 | |
aff410f1 MS |
1280 | /* Decide whether to complete on a list of gdb commands or on |
1281 | symbols. */ | |
83d31a92 TT |
1282 | tmp_command = (char *) alloca (point + 1); |
1283 | p = tmp_command; | |
c5f0f3d0 | 1284 | |
ace21957 MF |
1285 | /* The help command should complete help aliases. */ |
1286 | ignore_help_classes = reason != handle_help; | |
1287 | ||
83d31a92 TT |
1288 | strncpy (tmp_command, line_buffer, point); |
1289 | tmp_command[point] = '\0'; | |
eb3ff9a5 PA |
1290 | if (reason == handle_brkchars) |
1291 | { | |
1292 | gdb_assert (text == NULL); | |
1293 | word = NULL; | |
1294 | } | |
1295 | else | |
1296 | { | |
1297 | /* Since text always contains some number of characters leading up | |
1298 | to point, we can find the equivalent position in tmp_command | |
1299 | by subtracting that many characters from the end of tmp_command. */ | |
1300 | word = tmp_command + point - strlen (text); | |
1301 | } | |
c5f0f3d0 | 1302 | |
a81aaca0 PA |
1303 | /* Move P up to the start of the command. */ |
1304 | p = skip_spaces (p); | |
1305 | ||
1306 | if (*p == '\0') | |
83d31a92 | 1307 | { |
a81aaca0 PA |
1308 | /* An empty line is ambiguous; that is, it could be any |
1309 | command. */ | |
1427fe5e | 1310 | c = CMD_LIST_AMBIGUOUS; |
83d31a92 TT |
1311 | result_list = 0; |
1312 | } | |
1313 | else | |
1536146f AB |
1314 | c = lookup_cmd_1 (&p, cmdlist, &result_list, NULL, ignore_help_classes, |
1315 | true); | |
c5f0f3d0 | 1316 | |
83d31a92 TT |
1317 | /* Move p up to the next interesting thing. */ |
1318 | while (*p == ' ' || *p == '\t') | |
1319 | { | |
1320 | p++; | |
1321 | } | |
c5f0f3d0 | 1322 | |
c6756f62 PA |
1323 | tracker.advance_custom_word_point_by (p - tmp_command); |
1324 | ||
83d31a92 TT |
1325 | if (!c) |
1326 | { | |
1327 | /* It is an unrecognized command. So there are no | |
1328 | possible completions. */ | |
83d31a92 | 1329 | } |
1427fe5e | 1330 | else if (c == CMD_LIST_AMBIGUOUS) |
83d31a92 | 1331 | { |
6f937416 | 1332 | const char *q; |
83d31a92 TT |
1333 | |
1334 | /* lookup_cmd_1 advances p up to the first ambiguous thing, but | |
1335 | doesn't advance over that thing itself. Do so now. */ | |
1336 | q = p; | |
be09caf1 | 1337 | while (valid_cmd_char_p (*q)) |
83d31a92 TT |
1338 | ++q; |
1339 | if (q != tmp_command + point) | |
c5f0f3d0 | 1340 | { |
83d31a92 TT |
1341 | /* There is something beyond the ambiguous |
1342 | command, so there are no possible completions. For | |
1343 | example, "info t " or "info t foo" does not complete | |
1344 | to anything, because "info t" can be "info target" or | |
1345 | "info terminal". */ | |
c5f0f3d0 | 1346 | } |
83d31a92 | 1347 | else |
c5f0f3d0 | 1348 | { |
83d31a92 TT |
1349 | /* We're trying to complete on the command which was ambiguous. |
1350 | This we can deal with. */ | |
1351 | if (result_list) | |
c5f0f3d0 | 1352 | { |
67c296a2 | 1353 | if (reason != handle_brkchars) |
14b42fc4 | 1354 | complete_on_cmdlist (*result_list->subcommands, tracker, p, |
eb3ff9a5 | 1355 | word, ignore_help_classes); |
c5f0f3d0 FN |
1356 | } |
1357 | else | |
1358 | { | |
67c296a2 | 1359 | if (reason != handle_brkchars) |
eb3ff9a5 PA |
1360 | complete_on_cmdlist (cmdlist, tracker, p, word, |
1361 | ignore_help_classes); | |
c5f0f3d0 | 1362 | } |
489f0516 | 1363 | /* Ensure that readline does the right thing with respect to |
83d31a92 | 1364 | inserting quotes. */ |
67cb5b2d PA |
1365 | set_rl_completer_word_break_characters |
1366 | (gdb_completer_command_word_break_characters); | |
c5f0f3d0 | 1367 | } |
83d31a92 TT |
1368 | } |
1369 | else | |
1370 | { | |
1371 | /* We've recognized a full command. */ | |
1372 | ||
1373 | if (p == tmp_command + point) | |
c5f0f3d0 | 1374 | { |
aff410f1 MS |
1375 | /* There is no non-whitespace in the line beyond the |
1376 | command. */ | |
c5f0f3d0 | 1377 | |
83d31a92 | 1378 | if (p[-1] == ' ' || p[-1] == '\t') |
c5f0f3d0 | 1379 | { |
aff410f1 MS |
1380 | /* The command is followed by whitespace; we need to |
1381 | complete on whatever comes after command. */ | |
3d0b3564 | 1382 | if (c->is_prefix ()) |
c5f0f3d0 | 1383 | { |
83d31a92 TT |
1384 | /* It is a prefix command; what comes after it is |
1385 | a subcommand (e.g. "info "). */ | |
67c296a2 | 1386 | if (reason != handle_brkchars) |
14b42fc4 | 1387 | complete_on_cmdlist (*c->subcommands, tracker, p, word, |
eb3ff9a5 | 1388 | ignore_help_classes); |
c5f0f3d0 | 1389 | |
489f0516 | 1390 | /* Ensure that readline does the right thing |
9c3f90bd | 1391 | with respect to inserting quotes. */ |
67cb5b2d PA |
1392 | set_rl_completer_word_break_characters |
1393 | (gdb_completer_command_word_break_characters); | |
c5f0f3d0 | 1394 | } |
67c296a2 | 1395 | else if (reason == handle_help) |
eb3ff9a5 | 1396 | ; |
c5f0f3d0 FN |
1397 | else if (c->enums) |
1398 | { | |
67c296a2 | 1399 | if (reason != handle_brkchars) |
eb3ff9a5 | 1400 | complete_on_enum (tracker, c->enums, p, word); |
67cb5b2d PA |
1401 | set_rl_completer_word_break_characters |
1402 | (gdb_completer_command_word_break_characters); | |
c5f0f3d0 FN |
1403 | } |
1404 | else | |
1405 | { | |
83d31a92 TT |
1406 | /* It is a normal command; what comes after it is |
1407 | completed by the command's completer function. */ | |
eb3ff9a5 PA |
1408 | complete_line_internal_normal_command (tracker, |
1409 | tmp_command, word, p, | |
1410 | reason, c); | |
c5f0f3d0 FN |
1411 | } |
1412 | } | |
83d31a92 TT |
1413 | else |
1414 | { | |
1415 | /* The command is not followed by whitespace; we need to | |
aff410f1 | 1416 | complete on the command itself, e.g. "p" which is a |
83d31a92 TT |
1417 | command itself but also can complete to "print", "ptype" |
1418 | etc. */ | |
6f937416 | 1419 | const char *q; |
83d31a92 TT |
1420 | |
1421 | /* Find the command we are completing on. */ | |
1422 | q = p; | |
1423 | while (q > tmp_command) | |
1424 | { | |
be09caf1 | 1425 | if (valid_cmd_char_p (q[-1])) |
83d31a92 TT |
1426 | --q; |
1427 | else | |
1428 | break; | |
1429 | } | |
1430 | ||
3844e605 PA |
1431 | /* Move the custom word point back too. */ |
1432 | tracker.advance_custom_word_point_by (q - p); | |
1433 | ||
67c296a2 | 1434 | if (reason != handle_brkchars) |
eb3ff9a5 PA |
1435 | complete_on_cmdlist (result_list, tracker, q, word, |
1436 | ignore_help_classes); | |
83d31a92 | 1437 | |
489f0516 | 1438 | /* Ensure that readline does the right thing |
9c3f90bd | 1439 | with respect to inserting quotes. */ |
67cb5b2d PA |
1440 | set_rl_completer_word_break_characters |
1441 | (gdb_completer_command_word_break_characters); | |
83d31a92 TT |
1442 | } |
1443 | } | |
67c296a2 | 1444 | else if (reason == handle_help) |
eb3ff9a5 | 1445 | ; |
83d31a92 TT |
1446 | else |
1447 | { | |
1448 | /* There is non-whitespace beyond the command. */ | |
1449 | ||
3d0b3564 | 1450 | if (c->is_prefix () && !c->allow_unknown) |
83d31a92 TT |
1451 | { |
1452 | /* It is an unrecognized subcommand of a prefix command, | |
1453 | e.g. "info adsfkdj". */ | |
83d31a92 TT |
1454 | } |
1455 | else if (c->enums) | |
1456 | { | |
67c296a2 | 1457 | if (reason != handle_brkchars) |
eb3ff9a5 | 1458 | complete_on_enum (tracker, c->enums, p, word); |
83d31a92 TT |
1459 | } |
1460 | else | |
1461 | { | |
1462 | /* It is a normal command. */ | |
eb3ff9a5 PA |
1463 | complete_line_internal_normal_command (tracker, |
1464 | tmp_command, word, p, | |
1465 | reason, c); | |
83d31a92 TT |
1466 | } |
1467 | } | |
1468 | } | |
83d31a92 | 1469 | } |
ef0b411a | 1470 | |
eb3ff9a5 PA |
1471 | /* Wrapper around complete_line_internal_1 to handle |
1472 | MAX_COMPLETIONS_REACHED_ERROR. */ | |
ef0b411a | 1473 | |
eb3ff9a5 PA |
1474 | static void |
1475 | complete_line_internal (completion_tracker &tracker, | |
1476 | const char *text, | |
1477 | const char *line_buffer, int point, | |
1478 | complete_line_internal_reason reason) | |
1479 | { | |
a70b8144 | 1480 | try |
eb3ff9a5 PA |
1481 | { |
1482 | complete_line_internal_1 (tracker, text, line_buffer, point, reason); | |
1483 | } | |
230d2906 | 1484 | catch (const gdb_exception_error &except) |
eb3ff9a5 PA |
1485 | { |
1486 | if (except.error != MAX_COMPLETIONS_REACHED_ERROR) | |
eedc3f4f | 1487 | throw; |
eb3ff9a5 PA |
1488 | } |
1489 | } | |
ef0b411a GB |
1490 | |
1491 | /* See completer.h. */ | |
1492 | ||
eb3ff9a5 | 1493 | int max_completions = 200; |
ef0b411a | 1494 | |
eb3ff9a5 PA |
1495 | /* Initial size of the table. It automagically grows from here. */ |
1496 | #define INITIAL_COMPLETION_HTAB_SIZE 200 | |
ef0b411a | 1497 | |
eb3ff9a5 | 1498 | /* See completer.h. */ |
ef0b411a | 1499 | |
3b9ff5d9 AB |
1500 | completion_tracker::completion_tracker (bool from_readline) |
1501 | : m_from_readline (from_readline) | |
ef0b411a | 1502 | { |
724fd9ba | 1503 | discard_completions (); |
ef0b411a GB |
1504 | } |
1505 | ||
1506 | /* See completer.h. */ | |
1507 | ||
c6756f62 PA |
1508 | void |
1509 | completion_tracker::discard_completions () | |
1510 | { | |
1511 | xfree (m_lowest_common_denominator); | |
1512 | m_lowest_common_denominator = NULL; | |
1513 | ||
1514 | m_lowest_common_denominator_unique = false; | |
724fd9ba AB |
1515 | m_lowest_common_denominator_valid = false; |
1516 | ||
32580f6d | 1517 | m_entries_hash.reset (nullptr); |
724fd9ba AB |
1518 | |
1519 | /* A callback used by the hash table to compare new entries with existing | |
2698f5ea | 1520 | entries. We can't use the standard htab_eq_string function here as the |
724fd9ba AB |
1521 | key to our hash is just a single string, while the values we store in |
1522 | the hash are a struct containing multiple strings. */ | |
1523 | static auto entry_eq_func | |
1524 | = [] (const void *first, const void *second) -> int | |
1525 | { | |
1526 | /* The FIRST argument is the entry already in the hash table, and | |
1527 | the SECOND argument is the new item being inserted. */ | |
1528 | const completion_hash_entry *entry | |
1529 | = (const completion_hash_entry *) first; | |
1530 | const char *name_str = (const char *) second; | |
c6756f62 | 1531 | |
724fd9ba AB |
1532 | return entry->is_name_eq (name_str); |
1533 | }; | |
c6756f62 | 1534 | |
99f1bc6a AB |
1535 | /* Callback used by the hash table to compute the hash value for an |
1536 | existing entry. This is needed when expanding the hash table. */ | |
1537 | static auto entry_hash_func | |
1538 | = [] (const void *arg) -> hashval_t | |
1539 | { | |
1540 | const completion_hash_entry *entry | |
1541 | = (const completion_hash_entry *) arg; | |
1542 | return entry->hash_name (); | |
1543 | }; | |
1544 | ||
ef5f598c TT |
1545 | m_entries_hash.reset |
1546 | (htab_create_alloc (INITIAL_COMPLETION_HTAB_SIZE, | |
1547 | entry_hash_func, entry_eq_func, | |
1548 | htab_delete_entry<completion_hash_entry>, | |
1549 | xcalloc, xfree)); | |
c6756f62 PA |
1550 | } |
1551 | ||
1552 | /* See completer.h. */ | |
1553 | ||
eb3ff9a5 | 1554 | completion_tracker::~completion_tracker () |
ef0b411a | 1555 | { |
eb3ff9a5 | 1556 | xfree (m_lowest_common_denominator); |
ef0b411a GB |
1557 | } |
1558 | ||
1559 | /* See completer.h. */ | |
1560 | ||
eb3ff9a5 | 1561 | bool |
a207cff2 PA |
1562 | completion_tracker::maybe_add_completion |
1563 | (gdb::unique_xmalloc_ptr<char> name, | |
a22ecf70 PA |
1564 | completion_match_for_lcd *match_for_lcd, |
1565 | const char *text, const char *word) | |
ef0b411a GB |
1566 | { |
1567 | void **slot; | |
1568 | ||
ef0b411a | 1569 | if (max_completions == 0) |
eb3ff9a5 | 1570 | return false; |
ef0b411a | 1571 | |
32580f6d | 1572 | if (htab_elements (m_entries_hash.get ()) >= max_completions) |
eb3ff9a5 | 1573 | return false; |
ef0b411a | 1574 | |
724fd9ba | 1575 | hashval_t hash = htab_hash_string (name.get ()); |
32580f6d TT |
1576 | slot = htab_find_slot_with_hash (m_entries_hash.get (), name.get (), |
1577 | hash, INSERT); | |
eb3ff9a5 PA |
1578 | if (*slot == HTAB_EMPTY_ENTRY) |
1579 | { | |
a207cff2 PA |
1580 | const char *match_for_lcd_str = NULL; |
1581 | ||
1582 | if (match_for_lcd != NULL) | |
1583 | match_for_lcd_str = match_for_lcd->finish (); | |
1584 | ||
1585 | if (match_for_lcd_str == NULL) | |
1586 | match_for_lcd_str = name.get (); | |
ef0b411a | 1587 | |
a22ecf70 PA |
1588 | gdb::unique_xmalloc_ptr<char> lcd |
1589 | = make_completion_match_str (match_for_lcd_str, text, word); | |
1590 | ||
724fd9ba AB |
1591 | size_t lcd_len = strlen (lcd.get ()); |
1592 | *slot = new completion_hash_entry (std::move (name), std::move (lcd)); | |
ef0b411a | 1593 | |
724fd9ba AB |
1594 | m_lowest_common_denominator_valid = false; |
1595 | m_lowest_common_denominator_max_length | |
1596 | = std::max (m_lowest_common_denominator_max_length, lcd_len); | |
eb3ff9a5 | 1597 | } |
ef0b411a | 1598 | |
eb3ff9a5 PA |
1599 | return true; |
1600 | } | |
1601 | ||
1602 | /* See completer.h. */ | |
ef0b411a | 1603 | |
eb3ff9a5 | 1604 | void |
a207cff2 | 1605 | completion_tracker::add_completion (gdb::unique_xmalloc_ptr<char> name, |
a22ecf70 PA |
1606 | completion_match_for_lcd *match_for_lcd, |
1607 | const char *text, const char *word) | |
eb3ff9a5 | 1608 | { |
a22ecf70 | 1609 | if (!maybe_add_completion (std::move (name), match_for_lcd, text, word)) |
eb3ff9a5 | 1610 | throw_error (MAX_COMPLETIONS_REACHED_ERROR, _("Max completions reached.")); |
ef0b411a GB |
1611 | } |
1612 | ||
eb3ff9a5 PA |
1613 | /* See completer.h. */ |
1614 | ||
ef0b411a | 1615 | void |
eb3ff9a5 | 1616 | completion_tracker::add_completions (completion_list &&list) |
ef0b411a | 1617 | { |
eb3ff9a5 PA |
1618 | for (auto &candidate : list) |
1619 | add_completion (std::move (candidate)); | |
ef0b411a GB |
1620 | } |
1621 | ||
19a2740f AB |
1622 | /* See completer.h. */ |
1623 | ||
1624 | void | |
1625 | completion_tracker::remove_completion (const char *name) | |
1626 | { | |
1627 | hashval_t hash = htab_hash_string (name); | |
32580f6d | 1628 | if (htab_find_slot_with_hash (m_entries_hash.get (), name, hash, NO_INSERT) |
19a2740f AB |
1629 | != NULL) |
1630 | { | |
32580f6d | 1631 | htab_remove_elt_with_hash (m_entries_hash.get (), name, hash); |
19a2740f AB |
1632 | m_lowest_common_denominator_valid = false; |
1633 | } | |
1634 | } | |
1635 | ||
60a20c19 PA |
1636 | /* Helper for the make_completion_match_str overloads. Returns NULL |
1637 | as an indication that we want MATCH_NAME exactly. It is up to the | |
1638 | caller to xstrdup that string if desired. */ | |
1639 | ||
1640 | static char * | |
1641 | make_completion_match_str_1 (const char *match_name, | |
1642 | const char *text, const char *word) | |
1643 | { | |
1644 | char *newobj; | |
1645 | ||
1646 | if (word == text) | |
1647 | { | |
1648 | /* Return NULL as an indication that we want MATCH_NAME | |
1649 | exactly. */ | |
1650 | return NULL; | |
1651 | } | |
1652 | else if (word > text) | |
1653 | { | |
1654 | /* Return some portion of MATCH_NAME. */ | |
1655 | newobj = xstrdup (match_name + (word - text)); | |
1656 | } | |
1657 | else | |
1658 | { | |
1659 | /* Return some of WORD plus MATCH_NAME. */ | |
1660 | size_t len = strlen (match_name); | |
1661 | newobj = (char *) xmalloc (text - word + len + 1); | |
1662 | memcpy (newobj, word, text - word); | |
1663 | memcpy (newobj + (text - word), match_name, len + 1); | |
1664 | } | |
1665 | ||
1666 | return newobj; | |
1667 | } | |
1668 | ||
1669 | /* See completer.h. */ | |
1670 | ||
1671 | gdb::unique_xmalloc_ptr<char> | |
1672 | make_completion_match_str (const char *match_name, | |
1673 | const char *text, const char *word) | |
1674 | { | |
1675 | char *newobj = make_completion_match_str_1 (match_name, text, word); | |
1676 | if (newobj == NULL) | |
1677 | newobj = xstrdup (match_name); | |
1678 | return gdb::unique_xmalloc_ptr<char> (newobj); | |
1679 | } | |
1680 | ||
1681 | /* See completer.h. */ | |
1682 | ||
1683 | gdb::unique_xmalloc_ptr<char> | |
1684 | make_completion_match_str (gdb::unique_xmalloc_ptr<char> &&match_name, | |
1685 | const char *text, const char *word) | |
1686 | { | |
1687 | char *newobj = make_completion_match_str_1 (match_name.get (), text, word); | |
1688 | if (newobj == NULL) | |
1689 | return std::move (match_name); | |
1690 | return gdb::unique_xmalloc_ptr<char> (newobj); | |
1691 | } | |
1692 | ||
6e035501 JV |
1693 | /* See complete.h. */ |
1694 | ||
1695 | completion_result | |
1696 | complete (const char *line, char const **word, int *quote_char) | |
1697 | { | |
3b9ff5d9 AB |
1698 | completion_tracker tracker_handle_brkchars (false); |
1699 | completion_tracker tracker_handle_completions (false); | |
6e035501 JV |
1700 | completion_tracker *tracker; |
1701 | ||
0ef209f2 JV |
1702 | /* The WORD should be set to the end of word to complete. We initialize |
1703 | to the completion point which is assumed to be at the end of LINE. | |
1704 | This leaves WORD to be initialized to a sensible value in cases | |
1705 | completion_find_completion_word() fails i.e., throws an exception. | |
1706 | See bug 24587. */ | |
1707 | *word = line + strlen (line); | |
1708 | ||
6e035501 JV |
1709 | try |
1710 | { | |
1711 | *word = completion_find_completion_word (tracker_handle_brkchars, | |
1712 | line, quote_char); | |
1713 | ||
1714 | /* Completers that provide a custom word point in the | |
1715 | handle_brkchars phase also compute their completions then. | |
1716 | Completers that leave the completion word handling to readline | |
1717 | must be called twice. */ | |
1718 | if (tracker_handle_brkchars.use_custom_word_point ()) | |
1719 | tracker = &tracker_handle_brkchars; | |
1720 | else | |
1721 | { | |
1722 | complete_line (tracker_handle_completions, *word, line, strlen (line)); | |
1723 | tracker = &tracker_handle_completions; | |
1724 | } | |
1725 | } | |
1726 | catch (const gdb_exception &ex) | |
1727 | { | |
1728 | return {}; | |
1729 | } | |
1730 | ||
1731 | return tracker->build_completion_result (*word, *word - line, strlen (line)); | |
1732 | } | |
1733 | ||
1734 | ||
eb3ff9a5 PA |
1735 | /* Generate completions all at once. Does nothing if max_completions |
1736 | is 0. If max_completions is non-negative, this will collect at | |
1737 | most max_completions strings. | |
83d31a92 | 1738 | |
67c296a2 PM |
1739 | TEXT is the caller's idea of the "word" we are looking at. |
1740 | ||
aff410f1 MS |
1741 | LINE_BUFFER is available to be looked at; it contains the entire |
1742 | text of the line. | |
67c296a2 PM |
1743 | |
1744 | POINT is the offset in that line of the cursor. You | |
1745 | should pretend that the line ends at POINT. */ | |
14032a66 | 1746 | |
eb3ff9a5 PA |
1747 | void |
1748 | complete_line (completion_tracker &tracker, | |
1749 | const char *text, const char *line_buffer, int point) | |
14032a66 | 1750 | { |
ef0b411a | 1751 | if (max_completions == 0) |
eb3ff9a5 PA |
1752 | return; |
1753 | complete_line_internal (tracker, text, line_buffer, point, | |
1754 | handle_completions); | |
14032a66 TT |
1755 | } |
1756 | ||
1757 | /* Complete on command names. Used by "help". */ | |
6e1dbf8c | 1758 | |
eb3ff9a5 | 1759 | void |
aff410f1 | 1760 | command_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1761 | completion_tracker &tracker, |
6f937416 | 1762 | const char *text, const char *word) |
14032a66 | 1763 | { |
eb3ff9a5 PA |
1764 | complete_line_internal (tracker, word, text, |
1765 | strlen (text), handle_help); | |
67c296a2 PM |
1766 | } |
1767 | ||
6e1dbf8c PA |
1768 | /* The corresponding completer_handle_brkchars implementation. */ |
1769 | ||
1770 | static void | |
1771 | command_completer_handle_brkchars (struct cmd_list_element *ignore, | |
eb3ff9a5 | 1772 | completion_tracker &tracker, |
6e1dbf8c PA |
1773 | const char *text, const char *word) |
1774 | { | |
1775 | set_rl_completer_word_break_characters | |
1776 | (gdb_completer_command_word_break_characters); | |
1777 | } | |
1778 | ||
de0bea00 MF |
1779 | /* Complete on signals. */ |
1780 | ||
eb3ff9a5 | 1781 | void |
de0bea00 | 1782 | signal_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1783 | completion_tracker &tracker, |
6f937416 | 1784 | const char *text, const char *word) |
de0bea00 | 1785 | { |
de0bea00 | 1786 | size_t len = strlen (word); |
570dc176 | 1787 | int signum; |
de0bea00 MF |
1788 | const char *signame; |
1789 | ||
1790 | for (signum = GDB_SIGNAL_FIRST; signum != GDB_SIGNAL_LAST; ++signum) | |
1791 | { | |
1792 | /* Can't handle this, so skip it. */ | |
1793 | if (signum == GDB_SIGNAL_0) | |
1794 | continue; | |
1795 | ||
570dc176 | 1796 | signame = gdb_signal_to_name ((enum gdb_signal) signum); |
de0bea00 MF |
1797 | |
1798 | /* Ignore the unknown signal case. */ | |
1799 | if (!signame || strcmp (signame, "?") == 0) | |
1800 | continue; | |
1801 | ||
1802 | if (strncasecmp (signame, word, len) == 0) | |
b02f78f9 | 1803 | tracker.add_completion (make_unique_xstrdup (signame)); |
de0bea00 | 1804 | } |
de0bea00 MF |
1805 | } |
1806 | ||
51f0e40d AB |
1807 | /* Bit-flags for selecting what the register and/or register-group |
1808 | completer should complete on. */ | |
71c24708 | 1809 | |
8d297bbf | 1810 | enum reg_completer_target |
51f0e40d AB |
1811 | { |
1812 | complete_register_names = 0x1, | |
1813 | complete_reggroup_names = 0x2 | |
1814 | }; | |
8d297bbf | 1815 | DEF_ENUM_FLAGS_TYPE (enum reg_completer_target, reg_completer_targets); |
51f0e40d AB |
1816 | |
1817 | /* Complete register names and/or reggroup names based on the value passed | |
1818 | in TARGETS. At least one bit in TARGETS must be set. */ | |
1819 | ||
eb3ff9a5 PA |
1820 | static void |
1821 | reg_or_group_completer_1 (completion_tracker &tracker, | |
51f0e40d | 1822 | const char *text, const char *word, |
8d297bbf | 1823 | reg_completer_targets targets) |
71c24708 | 1824 | { |
71c24708 AA |
1825 | size_t len = strlen (word); |
1826 | struct gdbarch *gdbarch; | |
71c24708 | 1827 | const char *name; |
71c24708 | 1828 | |
51f0e40d AB |
1829 | gdb_assert ((targets & (complete_register_names |
1830 | | complete_reggroup_names)) != 0); | |
1831 | gdbarch = get_current_arch (); | |
71c24708 | 1832 | |
51f0e40d | 1833 | if ((targets & complete_register_names) != 0) |
71c24708 | 1834 | { |
51f0e40d AB |
1835 | int i; |
1836 | ||
1837 | for (i = 0; | |
1838 | (name = user_reg_map_regnum_to_name (gdbarch, i)) != NULL; | |
1839 | i++) | |
1840 | { | |
1841 | if (*name != '\0' && strncmp (word, name, len) == 0) | |
b02f78f9 | 1842 | tracker.add_completion (make_unique_xstrdup (name)); |
51f0e40d | 1843 | } |
71c24708 AA |
1844 | } |
1845 | ||
51f0e40d | 1846 | if ((targets & complete_reggroup_names) != 0) |
71c24708 | 1847 | { |
1bca9b1e | 1848 | for (const struct reggroup *group : gdbarch_reggroups (gdbarch)) |
51f0e40d | 1849 | { |
af7ce09b | 1850 | name = group->name (); |
51f0e40d | 1851 | if (strncmp (word, name, len) == 0) |
b02f78f9 | 1852 | tracker.add_completion (make_unique_xstrdup (name)); |
51f0e40d | 1853 | } |
71c24708 | 1854 | } |
71c24708 AA |
1855 | } |
1856 | ||
51f0e40d AB |
1857 | /* Perform completion on register and reggroup names. */ |
1858 | ||
eb3ff9a5 | 1859 | void |
51f0e40d | 1860 | reg_or_group_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1861 | completion_tracker &tracker, |
51f0e40d AB |
1862 | const char *text, const char *word) |
1863 | { | |
eb3ff9a5 PA |
1864 | reg_or_group_completer_1 (tracker, text, word, |
1865 | (complete_register_names | |
1866 | | complete_reggroup_names)); | |
51f0e40d AB |
1867 | } |
1868 | ||
1869 | /* Perform completion on reggroup names. */ | |
1870 | ||
eb3ff9a5 | 1871 | void |
51f0e40d | 1872 | reggroup_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1873 | completion_tracker &tracker, |
51f0e40d AB |
1874 | const char *text, const char *word) |
1875 | { | |
eb3ff9a5 PA |
1876 | reg_or_group_completer_1 (tracker, text, word, |
1877 | complete_reggroup_names); | |
51f0e40d | 1878 | } |
71c24708 | 1879 | |
6e1dbf8c PA |
1880 | /* The default completer_handle_brkchars implementation. */ |
1881 | ||
1882 | static void | |
1883 | default_completer_handle_brkchars (struct cmd_list_element *ignore, | |
eb3ff9a5 | 1884 | completion_tracker &tracker, |
6e1dbf8c PA |
1885 | const char *text, const char *word) |
1886 | { | |
1887 | set_rl_completer_word_break_characters | |
53fc67f8 | 1888 | (current_language->word_break_characters ()); |
6e1dbf8c PA |
1889 | } |
1890 | ||
1891 | /* See definition in completer.h. */ | |
1892 | ||
1893 | completer_handle_brkchars_ftype * | |
1894 | completer_handle_brkchars_func_for_completer (completer_ftype *fn) | |
1895 | { | |
1896 | if (fn == filename_completer) | |
1897 | return filename_completer_handle_brkchars; | |
1898 | ||
c6756f62 PA |
1899 | if (fn == location_completer) |
1900 | return location_completer_handle_brkchars; | |
1901 | ||
6e1dbf8c PA |
1902 | if (fn == command_completer) |
1903 | return command_completer_handle_brkchars; | |
1904 | ||
1905 | return default_completer_handle_brkchars; | |
1906 | } | |
1907 | ||
c6756f62 PA |
1908 | /* Used as brkchars when we want to tell readline we have a custom |
1909 | word point. We do that by making our rl_completion_word_break_hook | |
1910 | set RL_POINT to the desired word point, and return the character at | |
1911 | the word break point as the break char. This is two bytes in order | |
1912 | to fit one break character plus the terminating null. */ | |
1913 | static char gdb_custom_word_point_brkchars[2]; | |
1914 | ||
1915 | /* Since rl_basic_quote_characters is not completer-specific, we save | |
1916 | its original value here, in order to be able to restore it in | |
1917 | gdb_rl_attempted_completion_function. */ | |
1918 | static const char *gdb_org_rl_basic_quote_characters = rl_basic_quote_characters; | |
1919 | ||
67c296a2 PM |
1920 | /* Get the list of chars that are considered as word breaks |
1921 | for the current command. */ | |
1922 | ||
eb3ff9a5 PA |
1923 | static char * |
1924 | gdb_completion_word_break_characters_throw () | |
67c296a2 | 1925 | { |
eb3ff9a5 PA |
1926 | /* New completion starting. Get rid of the previous tracker and |
1927 | start afresh. */ | |
1928 | delete current_completion.tracker; | |
3b9ff5d9 | 1929 | current_completion.tracker = new completion_tracker (true); |
eb3ff9a5 PA |
1930 | |
1931 | completion_tracker &tracker = *current_completion.tracker; | |
1932 | ||
1933 | complete_line_internal (tracker, NULL, rl_line_buffer, | |
1934 | rl_point, handle_brkchars); | |
c5504eaf | 1935 | |
c6756f62 PA |
1936 | if (tracker.use_custom_word_point ()) |
1937 | { | |
1938 | gdb_assert (tracker.custom_word_point () > 0); | |
1939 | rl_point = tracker.custom_word_point () - 1; | |
272d4594 PA |
1940 | |
1941 | gdb_assert (rl_point >= 0 && rl_point < strlen (rl_line_buffer)); | |
1942 | ||
c6756f62 PA |
1943 | gdb_custom_word_point_brkchars[0] = rl_line_buffer[rl_point]; |
1944 | rl_completer_word_break_characters = gdb_custom_word_point_brkchars; | |
1945 | rl_completer_quote_characters = NULL; | |
1946 | ||
1947 | /* Clear this too, so that if we're completing a quoted string, | |
1948 | readline doesn't consider the quote character a delimiter. | |
1949 | If we didn't do this, readline would auto-complete {b | |
1950 | 'fun<tab>} to {'b 'function()'}, i.e., add the terminating | |
1951 | \', but, it wouldn't append the separator space either, which | |
1952 | is not desirable. So instead we take care of appending the | |
1953 | quote character to the LCD ourselves, in | |
1954 | gdb_rl_attempted_completion_function. Since this global is | |
1955 | not just completer-specific, we'll restore it back to the | |
1956 | default in gdb_rl_attempted_completion_function. */ | |
1957 | rl_basic_quote_characters = NULL; | |
1958 | } | |
1959 | ||
1add37b5 | 1960 | return (char *) rl_completer_word_break_characters; |
14032a66 TT |
1961 | } |
1962 | ||
eb3ff9a5 PA |
1963 | char * |
1964 | gdb_completion_word_break_characters () | |
1965 | { | |
1966 | /* New completion starting. */ | |
1967 | current_completion.aborted = false; | |
83d31a92 | 1968 | |
a70b8144 | 1969 | try |
eb3ff9a5 PA |
1970 | { |
1971 | return gdb_completion_word_break_characters_throw (); | |
1972 | } | |
230d2906 | 1973 | catch (const gdb_exception &ex) |
eb3ff9a5 PA |
1974 | { |
1975 | /* Set this to that gdb_rl_attempted_completion_function knows | |
1976 | to abort early. */ | |
1977 | current_completion.aborted = true; | |
1978 | } | |
83d31a92 | 1979 | |
eb3ff9a5 PA |
1980 | return NULL; |
1981 | } | |
83d31a92 | 1982 | |
eb3ff9a5 | 1983 | /* See completer.h. */ |
83d31a92 | 1984 | |
6a2c1b87 PA |
1985 | const char * |
1986 | completion_find_completion_word (completion_tracker &tracker, const char *text, | |
1987 | int *quote_char) | |
1988 | { | |
1989 | size_t point = strlen (text); | |
1990 | ||
1991 | complete_line_internal (tracker, NULL, text, point, handle_brkchars); | |
1992 | ||
c6756f62 PA |
1993 | if (tracker.use_custom_word_point ()) |
1994 | { | |
1995 | gdb_assert (tracker.custom_word_point () > 0); | |
1996 | *quote_char = tracker.quote_char (); | |
1997 | return text + tracker.custom_word_point (); | |
1998 | } | |
1999 | ||
6a2c1b87 PA |
2000 | gdb_rl_completion_word_info info; |
2001 | ||
2002 | info.word_break_characters = rl_completer_word_break_characters; | |
4f440ff3 | 2003 | info.quote_characters = rl_completer_quote_characters; |
6a2c1b87 PA |
2004 | info.basic_quote_characters = rl_basic_quote_characters; |
2005 | ||
2006 | return gdb_rl_find_completion_word (&info, quote_char, NULL, text); | |
2007 | } | |
2008 | ||
2009 | /* See completer.h. */ | |
2010 | ||
eb3ff9a5 | 2011 | void |
724fd9ba | 2012 | completion_tracker::recompute_lcd_visitor (completion_hash_entry *entry) |
83d31a92 | 2013 | { |
724fd9ba | 2014 | if (!m_lowest_common_denominator_valid) |
eb3ff9a5 | 2015 | { |
724fd9ba AB |
2016 | /* This is the first lowest common denominator that we are |
2017 | considering, just copy it in. */ | |
2018 | strcpy (m_lowest_common_denominator, entry->get_lcd ()); | |
eb3ff9a5 | 2019 | m_lowest_common_denominator_unique = true; |
724fd9ba | 2020 | m_lowest_common_denominator_valid = true; |
eb3ff9a5 PA |
2021 | } |
2022 | else | |
83d31a92 | 2023 | { |
724fd9ba AB |
2024 | /* Find the common denominator between the currently-known lowest |
2025 | common denominator and NEW_MATCH_UP. That becomes the new lowest | |
2026 | common denominator. */ | |
eb3ff9a5 | 2027 | size_t i; |
724fd9ba | 2028 | const char *new_match = entry->get_lcd (); |
83d31a92 | 2029 | |
eb3ff9a5 PA |
2030 | for (i = 0; |
2031 | (new_match[i] != '\0' | |
2032 | && new_match[i] == m_lowest_common_denominator[i]); | |
2033 | i++) | |
2034 | ; | |
2035 | if (m_lowest_common_denominator[i] != new_match[i]) | |
83d31a92 | 2036 | { |
eb3ff9a5 PA |
2037 | m_lowest_common_denominator[i] = '\0'; |
2038 | m_lowest_common_denominator_unique = false; | |
c5f0f3d0 FN |
2039 | } |
2040 | } | |
eb3ff9a5 PA |
2041 | } |
2042 | ||
c6756f62 PA |
2043 | /* See completer.h. */ |
2044 | ||
724fd9ba AB |
2045 | void |
2046 | completion_tracker::recompute_lowest_common_denominator () | |
2047 | { | |
2048 | /* We've already done this. */ | |
2049 | if (m_lowest_common_denominator_valid) | |
2050 | return; | |
2051 | ||
2052 | /* Resize the storage to ensure we have enough space, the plus one gives | |
2053 | us space for the trailing null terminator we will include. */ | |
2054 | m_lowest_common_denominator | |
2055 | = (char *) xrealloc (m_lowest_common_denominator, | |
2056 | m_lowest_common_denominator_max_length + 1); | |
2057 | ||
2058 | /* Callback used to visit each entry in the m_entries_hash. */ | |
2059 | auto visitor_func | |
2060 | = [] (void **slot, void *info) -> int | |
2061 | { | |
2062 | completion_tracker *obj = (completion_tracker *) info; | |
2063 | completion_hash_entry *entry = (completion_hash_entry *) *slot; | |
2064 | obj->recompute_lcd_visitor (entry); | |
2065 | return 1; | |
2066 | }; | |
2067 | ||
32580f6d | 2068 | htab_traverse (m_entries_hash.get (), visitor_func, this); |
724fd9ba AB |
2069 | m_lowest_common_denominator_valid = true; |
2070 | } | |
2071 | ||
2072 | /* See completer.h. */ | |
2073 | ||
c6756f62 | 2074 | void |
3844e605 | 2075 | completion_tracker::advance_custom_word_point_by (int len) |
c6756f62 PA |
2076 | { |
2077 | m_custom_word_point += len; | |
2078 | } | |
2079 | ||
eb3ff9a5 PA |
2080 | /* Build a new C string that is a copy of LCD with the whitespace of |
2081 | ORIG/ORIG_LEN preserved. | |
2082 | ||
2083 | Say the user is completing a symbol name, with spaces, like: | |
2084 | ||
2085 | "foo ( i" | |
2086 | ||
2087 | and the resulting completion match is: | |
2088 | ||
2089 | "foo(int)" | |
2090 | ||
2091 | we want to end up with an input line like: | |
2092 | ||
2093 | "foo ( int)" | |
2094 | ^^^^^^^ => text from LCD [1], whitespace from ORIG preserved. | |
2095 | ^^ => new text from LCD | |
2096 | ||
2097 | [1] - We must take characters from the LCD instead of the original | |
2098 | text, since some completions want to change upper/lowercase. E.g.: | |
c5f0f3d0 | 2099 | |
eb3ff9a5 | 2100 | "handle sig<>" |
c5f0f3d0 | 2101 | |
eb3ff9a5 PA |
2102 | completes to: |
2103 | ||
2104 | "handle SIG[QUIT|etc.]" | |
2105 | */ | |
2106 | ||
2107 | static char * | |
2108 | expand_preserving_ws (const char *orig, size_t orig_len, | |
2109 | const char *lcd) | |
2110 | { | |
2111 | const char *p_orig = orig; | |
2112 | const char *orig_end = orig + orig_len; | |
2113 | const char *p_lcd = lcd; | |
2114 | std::string res; | |
2115 | ||
2116 | while (p_orig < orig_end) | |
c5f0f3d0 | 2117 | { |
eb3ff9a5 PA |
2118 | if (*p_orig == ' ') |
2119 | { | |
2120 | while (p_orig < orig_end && *p_orig == ' ') | |
2121 | res += *p_orig++; | |
f1735a53 | 2122 | p_lcd = skip_spaces (p_lcd); |
eb3ff9a5 PA |
2123 | } |
2124 | else | |
c5f0f3d0 | 2125 | { |
eb3ff9a5 PA |
2126 | /* Take characters from the LCD instead of the original |
2127 | text, since some completions change upper/lowercase. | |
2128 | E.g.: | |
2129 | "handle sig<>" | |
2130 | completes to: | |
2131 | "handle SIG[QUIT|etc.]" | |
2132 | */ | |
2133 | res += *p_lcd; | |
2134 | p_orig++; | |
2135 | p_lcd++; | |
c5f0f3d0 FN |
2136 | } |
2137 | } | |
2138 | ||
eb3ff9a5 PA |
2139 | while (*p_lcd != '\0') |
2140 | res += *p_lcd++; | |
2141 | ||
2142 | return xstrdup (res.c_str ()); | |
2143 | } | |
2144 | ||
2145 | /* See completer.h. */ | |
2146 | ||
2147 | completion_result | |
2148 | completion_tracker::build_completion_result (const char *text, | |
2149 | int start, int end) | |
2150 | { | |
32580f6d | 2151 | size_t element_count = htab_elements (m_entries_hash.get ()); |
eb3ff9a5 | 2152 | |
724fd9ba | 2153 | if (element_count == 0) |
eb3ff9a5 PA |
2154 | return {}; |
2155 | ||
2156 | /* +1 for the LCD, and +1 for NULL termination. */ | |
724fd9ba | 2157 | char **match_list = XNEWVEC (char *, 1 + element_count + 1); |
eb3ff9a5 PA |
2158 | |
2159 | /* Build replacement word, based on the LCD. */ | |
2160 | ||
724fd9ba | 2161 | recompute_lowest_common_denominator (); |
eb3ff9a5 PA |
2162 | match_list[0] |
2163 | = expand_preserving_ws (text, end - start, | |
2164 | m_lowest_common_denominator); | |
2165 | ||
2166 | if (m_lowest_common_denominator_unique) | |
2167 | { | |
c6756f62 PA |
2168 | /* We don't rely on readline appending the quote char as |
2169 | delimiter as then readline wouldn't append the ' ' after the | |
2170 | completion. */ | |
896a7aa6 | 2171 | char buf[2] = { (char) quote_char () }; |
c6756f62 PA |
2172 | |
2173 | match_list[0] = reconcat (match_list[0], match_list[0], | |
2174 | buf, (char *) NULL); | |
eb3ff9a5 PA |
2175 | match_list[1] = NULL; |
2176 | ||
c45ec17c PA |
2177 | /* If the tracker wants to, or we already have a space at the |
2178 | end of the match, tell readline to skip appending | |
2179 | another. */ | |
aafdfb4e | 2180 | char *match = match_list[0]; |
eb3ff9a5 | 2181 | bool completion_suppress_append |
c45ec17c | 2182 | = (suppress_append_ws () |
aafdfb4e TV |
2183 | || (match[0] != '\0' |
2184 | && match[strlen (match) - 1] == ' ')); | |
eb3ff9a5 PA |
2185 | |
2186 | return completion_result (match_list, 1, completion_suppress_append); | |
2187 | } | |
2188 | else | |
2189 | { | |
724fd9ba AB |
2190 | /* State object used while building the completion list. */ |
2191 | struct list_builder | |
2192 | { | |
2193 | list_builder (char **ml) | |
2194 | : match_list (ml), | |
2195 | index (1) | |
2196 | { /* Nothing. */ } | |
2197 | ||
2198 | /* The list we are filling. */ | |
2199 | char **match_list; | |
2200 | ||
2201 | /* The next index in the list to write to. */ | |
2202 | int index; | |
2203 | }; | |
2204 | list_builder builder (match_list); | |
2205 | ||
2206 | /* Visit each entry in m_entries_hash and add it to the completion | |
2207 | list, updating the builder state object. */ | |
2208 | auto func | |
2209 | = [] (void **slot, void *info) -> int | |
2210 | { | |
2211 | completion_hash_entry *entry = (completion_hash_entry *) *slot; | |
2212 | list_builder *state = (list_builder *) info; | |
2213 | ||
2214 | state->match_list[state->index] = entry->release_name (); | |
2215 | state->index++; | |
2216 | return 1; | |
2217 | }; | |
2218 | ||
2219 | /* Build the completion list and add a null at the end. */ | |
32580f6d | 2220 | htab_traverse_noresize (m_entries_hash.get (), func, &builder); |
724fd9ba AB |
2221 | match_list[builder.index] = NULL; |
2222 | ||
2223 | return completion_result (match_list, builder.index - 1, false); | |
eb3ff9a5 PA |
2224 | } |
2225 | } | |
2226 | ||
2227 | /* See completer.h */ | |
2228 | ||
2229 | completion_result::completion_result () | |
2230 | : match_list (NULL), number_matches (0), | |
2231 | completion_suppress_append (false) | |
2232 | {} | |
2233 | ||
2234 | /* See completer.h */ | |
2235 | ||
2236 | completion_result::completion_result (char **match_list_, | |
2237 | size_t number_matches_, | |
2238 | bool completion_suppress_append_) | |
2239 | : match_list (match_list_), | |
2240 | number_matches (number_matches_), | |
2241 | completion_suppress_append (completion_suppress_append_) | |
2242 | {} | |
2243 | ||
2244 | /* See completer.h */ | |
2245 | ||
2246 | completion_result::~completion_result () | |
2247 | { | |
2248 | reset_match_list (); | |
2249 | } | |
2250 | ||
2251 | /* See completer.h */ | |
2252 | ||
0fa7617d TT |
2253 | completion_result::completion_result (completion_result &&rhs) noexcept |
2254 | : match_list (rhs.match_list), | |
2255 | number_matches (rhs.number_matches) | |
eb3ff9a5 | 2256 | { |
eb3ff9a5 | 2257 | rhs.match_list = NULL; |
eb3ff9a5 PA |
2258 | rhs.number_matches = 0; |
2259 | } | |
2260 | ||
2261 | /* See completer.h */ | |
2262 | ||
2263 | char ** | |
2264 | completion_result::release_match_list () | |
2265 | { | |
2266 | char **ret = match_list; | |
2267 | match_list = NULL; | |
2268 | return ret; | |
2269 | } | |
2270 | ||
eb3ff9a5 PA |
2271 | /* See completer.h */ |
2272 | ||
2273 | void | |
2274 | completion_result::sort_match_list () | |
2275 | { | |
2276 | if (number_matches > 1) | |
2277 | { | |
2278 | /* Element 0 is special (it's the common prefix), leave it | |
2279 | be. */ | |
2280 | std::sort (&match_list[1], | |
2281 | &match_list[number_matches + 1], | |
2282 | compare_cstrings); | |
2283 | } | |
2284 | } | |
2285 | ||
2286 | /* See completer.h */ | |
2287 | ||
2288 | void | |
2289 | completion_result::reset_match_list () | |
2290 | { | |
2291 | if (match_list != NULL) | |
2292 | { | |
2293 | for (char **p = match_list; *p != NULL; p++) | |
2294 | xfree (*p); | |
2295 | xfree (match_list); | |
2296 | match_list = NULL; | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | /* Helper for gdb_rl_attempted_completion_function, which does most of | |
2301 | the work. This is called by readline to build the match list array | |
2302 | and to determine the lowest common denominator. The real matches | |
2303 | list starts at match[1], while match[0] is the slot holding | |
2304 | readline's idea of the lowest common denominator of all matches, | |
2305 | which is what readline replaces the completion "word" with. | |
2306 | ||
2307 | TEXT is the caller's idea of the "word" we are looking at, as | |
2308 | computed in the handle_brkchars phase. | |
2309 | ||
2310 | START is the offset from RL_LINE_BUFFER where TEXT starts. END is | |
2311 | the offset from RL_LINE_BUFFER where TEXT ends (i.e., where | |
2312 | rl_point is). | |
2313 | ||
2314 | You should thus pretend that the line ends at END (relative to | |
2315 | RL_LINE_BUFFER). | |
2316 | ||
2317 | RL_LINE_BUFFER contains the entire text of the line. RL_POINT is | |
2318 | the offset in that line of the cursor. You should pretend that the | |
2319 | line ends at POINT. | |
2320 | ||
2321 | Returns NULL if there are no completions. */ | |
2322 | ||
2323 | static char ** | |
2324 | gdb_rl_attempted_completion_function_throw (const char *text, int start, int end) | |
2325 | { | |
c6756f62 PA |
2326 | /* Completers that provide a custom word point in the |
2327 | handle_brkchars phase also compute their completions then. | |
2328 | Completers that leave the completion word handling to readline | |
2329 | must be called twice. If rl_point (i.e., END) is at column 0, | |
2330 | then readline skips the handle_brkchars phase, and so we create a | |
2331 | tracker now in that case too. */ | |
2332 | if (end == 0 || !current_completion.tracker->use_custom_word_point ()) | |
2333 | { | |
2334 | delete current_completion.tracker; | |
3b9ff5d9 | 2335 | current_completion.tracker = new completion_tracker (true); |
eb3ff9a5 | 2336 | |
c6756f62 PA |
2337 | complete_line (*current_completion.tracker, text, |
2338 | rl_line_buffer, rl_point); | |
2339 | } | |
c5f0f3d0 | 2340 | |
eb3ff9a5 PA |
2341 | completion_tracker &tracker = *current_completion.tracker; |
2342 | ||
2343 | completion_result result | |
2344 | = tracker.build_completion_result (text, start, end); | |
2345 | ||
2346 | rl_completion_suppress_append = result.completion_suppress_append; | |
2347 | return result.release_match_list (); | |
2348 | } | |
2349 | ||
2350 | /* Function installed as "rl_attempted_completion_function" readline | |
2351 | hook. Wrapper around gdb_rl_attempted_completion_function_throw | |
2352 | that catches C++ exceptions, which can't cross readline. */ | |
2353 | ||
2354 | char ** | |
2355 | gdb_rl_attempted_completion_function (const char *text, int start, int end) | |
2356 | { | |
c6756f62 PA |
2357 | /* Restore globals that might have been tweaked in |
2358 | gdb_completion_word_break_characters. */ | |
2359 | rl_basic_quote_characters = gdb_org_rl_basic_quote_characters; | |
2360 | ||
eb3ff9a5 PA |
2361 | /* If we end up returning NULL, either on error, or simple because |
2362 | there are no matches, inhibit readline's default filename | |
2363 | completer. */ | |
2364 | rl_attempted_completion_over = 1; | |
2365 | ||
2366 | /* If the handle_brkchars phase was aborted, don't try | |
2367 | completing. */ | |
2368 | if (current_completion.aborted) | |
2369 | return NULL; | |
2370 | ||
a70b8144 | 2371 | try |
eb3ff9a5 PA |
2372 | { |
2373 | return gdb_rl_attempted_completion_function_throw (text, start, end); | |
2374 | } | |
230d2906 | 2375 | catch (const gdb_exception &ex) |
eb3ff9a5 PA |
2376 | { |
2377 | } | |
eb3ff9a5 PA |
2378 | |
2379 | return NULL; | |
c5f0f3d0 | 2380 | } |
4e87b832 | 2381 | |
ef0b411a GB |
2382 | /* Return a message indicating that the maximum number of completions |
2383 | has been reached and that there may be more. */ | |
2384 | ||
2385 | const char * | |
2386 | get_max_completions_reached_message (void) | |
2387 | { | |
2388 | return _("*** List may be truncated, max-completions reached. ***"); | |
2389 | } | |
82083d6d DE |
2390 | \f |
2391 | /* GDB replacement for rl_display_match_list. | |
2392 | Readline doesn't provide a clean interface for TUI(curses). | |
2393 | A hack previously used was to send readline's rl_outstream through a pipe | |
2394 | and read it from the event loop. Bleah. IWBN if readline abstracted | |
2395 | away all the necessary bits, and this is what this code does. It | |
2396 | replicates the parts of readline we need and then adds an abstraction | |
2397 | layer, currently implemented as struct match_list_displayer, so that both | |
2398 | CLI and TUI can use it. We copy all this readline code to minimize | |
2399 | GDB-specific mods to readline. Once this code performs as desired then | |
2400 | we can submit it to the readline maintainers. | |
2401 | ||
2402 | N.B. A lot of the code is the way it is in order to minimize differences | |
2403 | from readline's copy. */ | |
2404 | ||
2405 | /* Not supported here. */ | |
2406 | #undef VISIBLE_STATS | |
2407 | ||
2408 | #if defined (HANDLE_MULTIBYTE) | |
2409 | #define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2) | |
2410 | #define MB_NULLWCH(x) ((x) == 0) | |
2411 | #endif | |
2412 | ||
2413 | #define ELLIPSIS_LEN 3 | |
2414 | ||
2415 | /* gdb version of readline/complete.c:get_y_or_n. | |
2416 | 'y' -> returns 1, and 'n' -> returns 0. | |
2417 | Also supported: space == 'y', RUBOUT == 'n', ctrl-g == start over. | |
2418 | If FOR_PAGER is non-zero, then also supported are: | |
2419 | NEWLINE or RETURN -> returns 2, and 'q' -> returns 0. */ | |
2420 | ||
2421 | static int | |
2422 | gdb_get_y_or_n (int for_pager, const struct match_list_displayer *displayer) | |
2423 | { | |
2424 | int c; | |
2425 | ||
2426 | for (;;) | |
2427 | { | |
2428 | RL_SETSTATE (RL_STATE_MOREINPUT); | |
2429 | c = displayer->read_key (displayer); | |
2430 | RL_UNSETSTATE (RL_STATE_MOREINPUT); | |
2431 | ||
2432 | if (c == 'y' || c == 'Y' || c == ' ') | |
2433 | return 1; | |
2434 | if (c == 'n' || c == 'N' || c == RUBOUT) | |
2435 | return 0; | |
2436 | if (c == ABORT_CHAR || c < 0) | |
2437 | { | |
2438 | /* Readline doesn't erase_entire_line here, but without it the | |
2439 | --More-- prompt isn't erased and neither is the text entered | |
2440 | thus far redisplayed. */ | |
2441 | displayer->erase_entire_line (displayer); | |
2442 | /* Note: The arguments to rl_abort are ignored. */ | |
2443 | rl_abort (0, 0); | |
2444 | } | |
2445 | if (for_pager && (c == NEWLINE || c == RETURN)) | |
2446 | return 2; | |
2447 | if (for_pager && (c == 'q' || c == 'Q')) | |
2448 | return 0; | |
2449 | displayer->beep (displayer); | |
2450 | } | |
2451 | } | |
2452 | ||
2453 | /* Pager function for tab-completion. | |
2454 | This is based on readline/complete.c:_rl_internal_pager. | |
2455 | LINES is the number of lines of output displayed thus far. | |
2456 | Returns: | |
2457 | -1 -> user pressed 'n' or equivalent, | |
2458 | 0 -> user pressed 'y' or equivalent, | |
2459 | N -> user pressed NEWLINE or equivalent and N is LINES - 1. */ | |
2460 | ||
2461 | static int | |
2462 | gdb_display_match_list_pager (int lines, | |
2463 | const struct match_list_displayer *displayer) | |
2464 | { | |
2465 | int i; | |
2466 | ||
2467 | displayer->puts (displayer, "--More--"); | |
2468 | displayer->flush (displayer); | |
2469 | i = gdb_get_y_or_n (1, displayer); | |
2470 | displayer->erase_entire_line (displayer); | |
2471 | if (i == 0) | |
2472 | return -1; | |
2473 | else if (i == 2) | |
2474 | return (lines - 1); | |
2475 | else | |
2476 | return 0; | |
2477 | } | |
2478 | ||
2479 | /* Return non-zero if FILENAME is a directory. | |
2480 | Based on readline/complete.c:path_isdir. */ | |
2481 | ||
2482 | static int | |
2483 | gdb_path_isdir (const char *filename) | |
2484 | { | |
2485 | struct stat finfo; | |
2486 | ||
2487 | return (stat (filename, &finfo) == 0 && S_ISDIR (finfo.st_mode)); | |
2488 | } | |
2489 | ||
2490 | /* Return the portion of PATHNAME that should be output when listing | |
2491 | possible completions. If we are hacking filename completion, we | |
2492 | are only interested in the basename, the portion following the | |
2493 | final slash. Otherwise, we return what we were passed. Since | |
2494 | printing empty strings is not very informative, if we're doing | |
2495 | filename completion, and the basename is the empty string, we look | |
2496 | for the previous slash and return the portion following that. If | |
2497 | there's no previous slash, we just return what we were passed. | |
2498 | ||
2499 | Based on readline/complete.c:printable_part. */ | |
2500 | ||
2501 | static char * | |
2502 | gdb_printable_part (char *pathname) | |
2503 | { | |
2504 | char *temp, *x; | |
2505 | ||
2506 | if (rl_filename_completion_desired == 0) /* don't need to do anything */ | |
2507 | return (pathname); | |
2508 | ||
2509 | temp = strrchr (pathname, '/'); | |
5836a818 | 2510 | #if defined (__MSDOS__) |
82083d6d DE |
2511 | if (temp == 0 && ISALPHA ((unsigned char)pathname[0]) && pathname[1] == ':') |
2512 | temp = pathname + 1; | |
2513 | #endif | |
2514 | ||
2515 | if (temp == 0 || *temp == '\0') | |
2516 | return (pathname); | |
2517 | /* If the basename is NULL, we might have a pathname like '/usr/src/'. | |
2518 | Look for a previous slash and, if one is found, return the portion | |
2519 | following that slash. If there's no previous slash, just return the | |
2520 | pathname we were passed. */ | |
2521 | else if (temp[1] == '\0') | |
2522 | { | |
2523 | for (x = temp - 1; x > pathname; x--) | |
dda83cd7 SM |
2524 | if (*x == '/') |
2525 | break; | |
82083d6d DE |
2526 | return ((*x == '/') ? x + 1 : pathname); |
2527 | } | |
2528 | else | |
2529 | return ++temp; | |
2530 | } | |
2531 | ||
2532 | /* Compute width of STRING when displayed on screen by print_filename. | |
2533 | Based on readline/complete.c:fnwidth. */ | |
2534 | ||
2535 | static int | |
2536 | gdb_fnwidth (const char *string) | |
2537 | { | |
2538 | int width, pos; | |
2539 | #if defined (HANDLE_MULTIBYTE) | |
2540 | mbstate_t ps; | |
2541 | int left, w; | |
2542 | size_t clen; | |
2543 | wchar_t wc; | |
2544 | ||
2545 | left = strlen (string) + 1; | |
2546 | memset (&ps, 0, sizeof (mbstate_t)); | |
2547 | #endif | |
2548 | ||
2549 | width = pos = 0; | |
2550 | while (string[pos]) | |
2551 | { | |
2552 | if (CTRL_CHAR (string[pos]) || string[pos] == RUBOUT) | |
2553 | { | |
2554 | width += 2; | |
2555 | pos++; | |
2556 | } | |
2557 | else | |
2558 | { | |
2559 | #if defined (HANDLE_MULTIBYTE) | |
2560 | clen = mbrtowc (&wc, string + pos, left - pos, &ps); | |
2561 | if (MB_INVALIDCH (clen)) | |
2562 | { | |
2563 | width++; | |
2564 | pos++; | |
2565 | memset (&ps, 0, sizeof (mbstate_t)); | |
2566 | } | |
2567 | else if (MB_NULLWCH (clen)) | |
2568 | break; | |
2569 | else | |
2570 | { | |
2571 | pos += clen; | |
2572 | w = wcwidth (wc); | |
2573 | width += (w >= 0) ? w : 1; | |
2574 | } | |
2575 | #else | |
2576 | width++; | |
2577 | pos++; | |
2578 | #endif | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | return width; | |
2583 | } | |
2584 | ||
2585 | /* Print TO_PRINT, one matching completion. | |
2586 | PREFIX_BYTES is number of common prefix bytes. | |
2587 | Based on readline/complete.c:fnprint. */ | |
2588 | ||
2589 | static int | |
2590 | gdb_fnprint (const char *to_print, int prefix_bytes, | |
2591 | const struct match_list_displayer *displayer) | |
2592 | { | |
0a4f5f8c | 2593 | int printed_len, w; |
82083d6d DE |
2594 | const char *s; |
2595 | #if defined (HANDLE_MULTIBYTE) | |
2596 | mbstate_t ps; | |
2597 | const char *end; | |
2598 | size_t tlen; | |
2599 | int width; | |
2600 | wchar_t wc; | |
2601 | ||
2602 | end = to_print + strlen (to_print) + 1; | |
2603 | memset (&ps, 0, sizeof (mbstate_t)); | |
2604 | #endif | |
2605 | ||
0a4f5f8c | 2606 | printed_len = 0; |
82083d6d DE |
2607 | |
2608 | /* Don't print only the ellipsis if the common prefix is one of the | |
2609 | possible completions */ | |
2610 | if (to_print[prefix_bytes] == '\0') | |
2611 | prefix_bytes = 0; | |
2612 | ||
0a4f5f8c | 2613 | if (prefix_bytes) |
82083d6d DE |
2614 | { |
2615 | char ellipsis; | |
2616 | ||
2617 | ellipsis = (to_print[prefix_bytes] == '.') ? '_' : '.'; | |
2618 | for (w = 0; w < ELLIPSIS_LEN; w++) | |
2619 | displayer->putch (displayer, ellipsis); | |
2620 | printed_len = ELLIPSIS_LEN; | |
2621 | } | |
2622 | ||
2623 | s = to_print + prefix_bytes; | |
2624 | while (*s) | |
2625 | { | |
2626 | if (CTRL_CHAR (*s)) | |
dda83cd7 SM |
2627 | { |
2628 | displayer->putch (displayer, '^'); | |
2629 | displayer->putch (displayer, UNCTRL (*s)); | |
2630 | printed_len += 2; | |
2631 | s++; | |
82083d6d DE |
2632 | #if defined (HANDLE_MULTIBYTE) |
2633 | memset (&ps, 0, sizeof (mbstate_t)); | |
2634 | #endif | |
dda83cd7 | 2635 | } |
82083d6d DE |
2636 | else if (*s == RUBOUT) |
2637 | { | |
2638 | displayer->putch (displayer, '^'); | |
2639 | displayer->putch (displayer, '?'); | |
2640 | printed_len += 2; | |
2641 | s++; | |
2642 | #if defined (HANDLE_MULTIBYTE) | |
2643 | memset (&ps, 0, sizeof (mbstate_t)); | |
2644 | #endif | |
2645 | } | |
2646 | else | |
2647 | { | |
2648 | #if defined (HANDLE_MULTIBYTE) | |
2649 | tlen = mbrtowc (&wc, s, end - s, &ps); | |
2650 | if (MB_INVALIDCH (tlen)) | |
2651 | { | |
2652 | tlen = 1; | |
2653 | width = 1; | |
2654 | memset (&ps, 0, sizeof (mbstate_t)); | |
2655 | } | |
2656 | else if (MB_NULLWCH (tlen)) | |
2657 | break; | |
2658 | else | |
2659 | { | |
2660 | w = wcwidth (wc); | |
2661 | width = (w >= 0) ? w : 1; | |
2662 | } | |
2663 | for (w = 0; w < tlen; ++w) | |
2664 | displayer->putch (displayer, s[w]); | |
2665 | s += tlen; | |
2666 | printed_len += width; | |
2667 | #else | |
2668 | displayer->putch (displayer, *s); | |
2669 | s++; | |
2670 | printed_len++; | |
2671 | #endif | |
2672 | } | |
2673 | } | |
2674 | ||
2675 | return printed_len; | |
2676 | } | |
2677 | ||
2678 | /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we | |
2679 | are using it, check for and output a single character for `special' | |
2680 | filenames. Return the number of characters we output. | |
2681 | Based on readline/complete.c:print_filename. */ | |
2682 | ||
2683 | static int | |
2684 | gdb_print_filename (char *to_print, char *full_pathname, int prefix_bytes, | |
2685 | const struct match_list_displayer *displayer) | |
2686 | { | |
2687 | int printed_len, extension_char, slen, tlen; | |
a121b7c1 PA |
2688 | char *s, c, *new_full_pathname; |
2689 | const char *dn; | |
82083d6d DE |
2690 | extern int _rl_complete_mark_directories; |
2691 | ||
2692 | extension_char = 0; | |
2693 | printed_len = gdb_fnprint (to_print, prefix_bytes, displayer); | |
2694 | ||
2695 | #if defined (VISIBLE_STATS) | |
2696 | if (rl_filename_completion_desired && (rl_visible_stats || _rl_complete_mark_directories)) | |
2697 | #else | |
2698 | if (rl_filename_completion_desired && _rl_complete_mark_directories) | |
2699 | #endif | |
2700 | { | |
2701 | /* If to_print != full_pathname, to_print is the basename of the | |
2702 | path passed. In this case, we try to expand the directory | |
2703 | name before checking for the stat character. */ | |
2704 | if (to_print != full_pathname) | |
2705 | { | |
2706 | /* Terminate the directory name. */ | |
2707 | c = to_print[-1]; | |
2708 | to_print[-1] = '\0'; | |
2709 | ||
2710 | /* If setting the last slash in full_pathname to a NUL results in | |
2711 | full_pathname being the empty string, we are trying to complete | |
2712 | files in the root directory. If we pass a null string to the | |
2713 | bash directory completion hook, for example, it will expand it | |
2714 | to the current directory. We just want the `/'. */ | |
2715 | if (full_pathname == 0 || *full_pathname == 0) | |
2716 | dn = "/"; | |
2717 | else if (full_pathname[0] != '/') | |
2718 | dn = full_pathname; | |
2719 | else if (full_pathname[1] == 0) | |
2720 | dn = "//"; /* restore trailing slash to `//' */ | |
2721 | else if (full_pathname[1] == '/' && full_pathname[2] == 0) | |
2722 | dn = "/"; /* don't turn /// into // */ | |
2723 | else | |
2724 | dn = full_pathname; | |
2725 | s = tilde_expand (dn); | |
2726 | if (rl_directory_completion_hook) | |
2727 | (*rl_directory_completion_hook) (&s); | |
2728 | ||
2729 | slen = strlen (s); | |
2730 | tlen = strlen (to_print); | |
2731 | new_full_pathname = (char *)xmalloc (slen + tlen + 2); | |
2732 | strcpy (new_full_pathname, s); | |
2733 | if (s[slen - 1] == '/') | |
2734 | slen--; | |
2735 | else | |
2736 | new_full_pathname[slen] = '/'; | |
2737 | new_full_pathname[slen] = '/'; | |
2738 | strcpy (new_full_pathname + slen + 1, to_print); | |
2739 | ||
2740 | #if defined (VISIBLE_STATS) | |
2741 | if (rl_visible_stats) | |
2742 | extension_char = stat_char (new_full_pathname); | |
2743 | else | |
2744 | #endif | |
2745 | if (gdb_path_isdir (new_full_pathname)) | |
2746 | extension_char = '/'; | |
2747 | ||
2748 | xfree (new_full_pathname); | |
2749 | to_print[-1] = c; | |
2750 | } | |
2751 | else | |
2752 | { | |
2753 | s = tilde_expand (full_pathname); | |
2754 | #if defined (VISIBLE_STATS) | |
2755 | if (rl_visible_stats) | |
2756 | extension_char = stat_char (s); | |
2757 | else | |
2758 | #endif | |
2759 | if (gdb_path_isdir (s)) | |
2760 | extension_char = '/'; | |
2761 | } | |
2762 | ||
2763 | xfree (s); | |
2764 | if (extension_char) | |
2765 | { | |
2766 | displayer->putch (displayer, extension_char); | |
2767 | printed_len++; | |
2768 | } | |
2769 | } | |
2770 | ||
2771 | return printed_len; | |
2772 | } | |
2773 | ||
2774 | /* GDB version of readline/complete.c:complete_get_screenwidth. */ | |
2775 | ||
2776 | static int | |
2777 | gdb_complete_get_screenwidth (const struct match_list_displayer *displayer) | |
2778 | { | |
2779 | /* Readline has other stuff here which it's not clear we need. */ | |
2780 | return displayer->width; | |
2781 | } | |
2782 | ||
0a4f5f8c | 2783 | extern int _rl_completion_prefix_display_length; |
56000a98 PA |
2784 | extern int _rl_print_completions_horizontally; |
2785 | ||
cf0d07fd | 2786 | extern "C" int _rl_qsort_string_compare (const void *, const void *); |
56000a98 PA |
2787 | typedef int QSFUNC (const void *, const void *); |
2788 | ||
82083d6d | 2789 | /* GDB version of readline/complete.c:rl_display_match_list. |
ef0b411a GB |
2790 | See gdb_display_match_list for a description of MATCHES, LEN, MAX. |
2791 | Returns non-zero if all matches are displayed. */ | |
82083d6d | 2792 | |
ef0b411a | 2793 | static int |
82083d6d DE |
2794 | gdb_display_match_list_1 (char **matches, int len, int max, |
2795 | const struct match_list_displayer *displayer) | |
2796 | { | |
2797 | int count, limit, printed_len, lines, cols; | |
2798 | int i, j, k, l, common_length, sind; | |
2799 | char *temp, *t; | |
2800 | int page_completions = displayer->height != INT_MAX && pagination_enabled; | |
82083d6d DE |
2801 | |
2802 | /* Find the length of the prefix common to all items: length as displayed | |
2803 | characters (common_length) and as a byte index into the matches (sind) */ | |
2804 | common_length = sind = 0; | |
0a4f5f8c | 2805 | if (_rl_completion_prefix_display_length > 0) |
82083d6d DE |
2806 | { |
2807 | t = gdb_printable_part (matches[0]); | |
2808 | temp = strrchr (t, '/'); | |
2809 | common_length = temp ? gdb_fnwidth (temp) : gdb_fnwidth (t); | |
2810 | sind = temp ? strlen (temp) : strlen (t); | |
2811 | ||
0a4f5f8c | 2812 | if (common_length > _rl_completion_prefix_display_length && common_length > ELLIPSIS_LEN) |
82083d6d | 2813 | max -= common_length - ELLIPSIS_LEN; |
0a4f5f8c | 2814 | else |
82083d6d DE |
2815 | common_length = sind = 0; |
2816 | } | |
2817 | ||
2818 | /* How many items of MAX length can we fit in the screen window? */ | |
2819 | cols = gdb_complete_get_screenwidth (displayer); | |
2820 | max += 2; | |
2821 | limit = cols / max; | |
2822 | if (limit != 1 && (limit * max == cols)) | |
2823 | limit--; | |
2824 | ||
2825 | /* If cols == 0, limit will end up -1 */ | |
2826 | if (cols < displayer->width && limit < 0) | |
2827 | limit = 1; | |
2828 | ||
2829 | /* Avoid a possible floating exception. If max > cols, | |
2830 | limit will be 0 and a divide-by-zero fault will result. */ | |
2831 | if (limit == 0) | |
2832 | limit = 1; | |
2833 | ||
2834 | /* How many iterations of the printing loop? */ | |
2835 | count = (len + (limit - 1)) / limit; | |
2836 | ||
2837 | /* Watch out for special case. If LEN is less than LIMIT, then | |
2838 | just do the inner printing loop. | |
2839 | 0 < len <= limit implies count = 1. */ | |
2840 | ||
2841 | /* Sort the items if they are not already sorted. */ | |
2842 | if (rl_ignore_completion_duplicates == 0 && rl_sort_completion_matches) | |
2843 | qsort (matches + 1, len, sizeof (char *), (QSFUNC *)_rl_qsort_string_compare); | |
2844 | ||
2845 | displayer->crlf (displayer); | |
2846 | ||
2847 | lines = 0; | |
2848 | if (_rl_print_completions_horizontally == 0) | |
2849 | { | |
2850 | /* Print the sorted items, up-and-down alphabetically, like ls. */ | |
2851 | for (i = 1; i <= count; i++) | |
2852 | { | |
2853 | for (j = 0, l = i; j < limit; j++) | |
2854 | { | |
2855 | if (l > len || matches[l] == 0) | |
2856 | break; | |
2857 | else | |
2858 | { | |
2859 | temp = gdb_printable_part (matches[l]); | |
2860 | printed_len = gdb_print_filename (temp, matches[l], sind, | |
2861 | displayer); | |
2862 | ||
2863 | if (j + 1 < limit) | |
2864 | for (k = 0; k < max - printed_len; k++) | |
2865 | displayer->putch (displayer, ' '); | |
2866 | } | |
2867 | l += count; | |
2868 | } | |
2869 | displayer->crlf (displayer); | |
2870 | lines++; | |
2871 | if (page_completions && lines >= (displayer->height - 1) && i < count) | |
2872 | { | |
2873 | lines = gdb_display_match_list_pager (lines, displayer); | |
2874 | if (lines < 0) | |
ef0b411a | 2875 | return 0; |
82083d6d DE |
2876 | } |
2877 | } | |
2878 | } | |
2879 | else | |
2880 | { | |
2881 | /* Print the sorted items, across alphabetically, like ls -x. */ | |
2882 | for (i = 1; matches[i]; i++) | |
2883 | { | |
2884 | temp = gdb_printable_part (matches[i]); | |
2885 | printed_len = gdb_print_filename (temp, matches[i], sind, displayer); | |
2886 | /* Have we reached the end of this line? */ | |
2887 | if (matches[i+1]) | |
2888 | { | |
2889 | if (i && (limit > 1) && (i % limit) == 0) | |
2890 | { | |
2891 | displayer->crlf (displayer); | |
2892 | lines++; | |
2893 | if (page_completions && lines >= displayer->height - 1) | |
2894 | { | |
2895 | lines = gdb_display_match_list_pager (lines, displayer); | |
2896 | if (lines < 0) | |
ef0b411a | 2897 | return 0; |
82083d6d DE |
2898 | } |
2899 | } | |
2900 | else | |
2901 | for (k = 0; k < max - printed_len; k++) | |
2902 | displayer->putch (displayer, ' '); | |
2903 | } | |
2904 | } | |
2905 | displayer->crlf (displayer); | |
2906 | } | |
ef0b411a GB |
2907 | |
2908 | return 1; | |
82083d6d DE |
2909 | } |
2910 | ||
2911 | /* Utility for displaying completion list matches, used by both CLI and TUI. | |
2912 | ||
2913 | MATCHES is the list of strings, in argv format, LEN is the number of | |
05cdcf3d DE |
2914 | strings in MATCHES, and MAX is the length of the longest string in |
2915 | MATCHES. */ | |
82083d6d DE |
2916 | |
2917 | void | |
2918 | gdb_display_match_list (char **matches, int len, int max, | |
2919 | const struct match_list_displayer *displayer) | |
2920 | { | |
ef0b411a GB |
2921 | /* Readline will never call this if complete_line returned NULL. */ |
2922 | gdb_assert (max_completions != 0); | |
2923 | ||
2924 | /* complete_line will never return more than this. */ | |
2925 | if (max_completions > 0) | |
2926 | gdb_assert (len <= max_completions); | |
2927 | ||
82083d6d DE |
2928 | if (rl_completion_query_items > 0 && len >= rl_completion_query_items) |
2929 | { | |
2930 | char msg[100]; | |
2931 | ||
2932 | /* We can't use *query here because they wait for <RET> which is | |
2933 | wrong here. This follows the readline version as closely as possible | |
2934 | for compatibility's sake. See readline/complete.c. */ | |
2935 | ||
2936 | displayer->crlf (displayer); | |
2937 | ||
2938 | xsnprintf (msg, sizeof (msg), | |
2939 | "Display all %d possibilities? (y or n)", len); | |
2940 | displayer->puts (displayer, msg); | |
2941 | displayer->flush (displayer); | |
2942 | ||
2943 | if (gdb_get_y_or_n (0, displayer) == 0) | |
2944 | { | |
2945 | displayer->crlf (displayer); | |
2946 | return; | |
2947 | } | |
2948 | } | |
2949 | ||
ef0b411a GB |
2950 | if (gdb_display_match_list_1 (matches, len, max, displayer)) |
2951 | { | |
2952 | /* Note: MAX_COMPLETIONS may be -1 or zero, but LEN is always > 0. */ | |
2953 | if (len == max_completions) | |
2954 | { | |
2955 | /* The maximum number of completions has been reached. Warn the user | |
2956 | that there may be more. */ | |
2957 | const char *message = get_max_completions_reached_message (); | |
2958 | ||
2959 | displayer->puts (displayer, message); | |
2960 | displayer->crlf (displayer); | |
2961 | } | |
2962 | } | |
2963 | } | |
ef0b411a | 2964 | |
7f51f2cd AB |
2965 | /* See completer.h. */ |
2966 | ||
2967 | bool | |
2968 | skip_over_slash_fmt (completion_tracker &tracker, const char **args) | |
2969 | { | |
2970 | const char *text = *args; | |
2971 | ||
2972 | if (text[0] == '/') | |
2973 | { | |
2974 | bool in_fmt; | |
2975 | tracker.set_use_custom_word_point (true); | |
2976 | ||
2977 | if (text[1] == '\0') | |
2978 | { | |
2979 | /* The user tried to complete after typing just the '/' character | |
2980 | of the /FMT string. Step the completer past the '/', but we | |
2981 | don't offer any completions. */ | |
2982 | in_fmt = true; | |
2983 | ++text; | |
2984 | } | |
2985 | else | |
2986 | { | |
2987 | /* The user has typed some characters after the '/', we assume | |
2988 | this is a complete /FMT string, first skip over it. */ | |
2989 | text = skip_to_space (text); | |
2990 | ||
2991 | if (*text == '\0') | |
2992 | { | |
2993 | /* We're at the end of the input string. The user has typed | |
2994 | '/FMT' and asked for a completion. Push an empty | |
2995 | completion string, this will cause readline to insert a | |
2996 | space so the user now has '/FMT '. */ | |
2997 | in_fmt = true; | |
2998 | tracker.add_completion (make_unique_xstrdup (text)); | |
2999 | } | |
3000 | else | |
3001 | { | |
3002 | /* The user has already typed things after the /FMT, skip the | |
3003 | whitespace and return false. Whoever called this function | |
3004 | should then try to complete what comes next. */ | |
3005 | in_fmt = false; | |
3006 | text = skip_spaces (text); | |
3007 | } | |
3008 | } | |
3009 | ||
3010 | tracker.advance_custom_word_point_by (text - *args); | |
3011 | *args = text; | |
3012 | return in_fmt; | |
3013 | } | |
3014 | ||
3015 | return false; | |
3016 | } | |
3017 | ||
6c265988 | 3018 | void _initialize_completer (); |
ef0b411a | 3019 | void |
6c265988 | 3020 | _initialize_completer () |
ef0b411a GB |
3021 | { |
3022 | add_setshow_zuinteger_unlimited_cmd ("max-completions", no_class, | |
3023 | &max_completions, _("\ | |
3024 | Set maximum number of completion candidates."), _("\ | |
3025 | Show maximum number of completion candidates."), _("\ | |
3026 | Use this to limit the number of candidates considered\n\ | |
3027 | during completion. Specifying \"unlimited\" or -1\n\ | |
3028 | disables limiting. Note that setting either no limit or\n\ | |
3029 | a very large limit can make completion slow."), | |
3030 | NULL, NULL, &setlist, &showlist); | |
82083d6d | 3031 | } |