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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 | 212 | gdb::unique_xmalloc_ptr<char> p_rl |
c66e8e5c | 213 | (rl_filename_completion_function (word, subsequent_name)); |
60a20c19 | 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 | 241 | tracker.add_completion |
c66e8e5c | 242 | (make_completion_match_str (std::move (p_rl), word, word)); |
c5f0f3d0 | 243 | } |
c5f0f3d0 FN |
244 | } |
245 | ||
6e1dbf8c PA |
246 | /* The corresponding completer_handle_brkchars |
247 | implementation. */ | |
248 | ||
249 | static void | |
250 | filename_completer_handle_brkchars (struct cmd_list_element *ignore, | |
eb3ff9a5 | 251 | completion_tracker &tracker, |
6e1dbf8c PA |
252 | const char *text, const char *word) |
253 | { | |
254 | set_rl_completer_word_break_characters | |
255 | (gdb_completer_file_name_break_characters); | |
4f440ff3 AB |
256 | |
257 | rl_completer_quote_characters = gdb_completer_file_name_quote_characters; | |
6e1dbf8c PA |
258 | } |
259 | ||
6a2c1b87 PA |
260 | /* Find the bounds of the current word for completion purposes, and |
261 | return a pointer to the end of the word. This mimics (and is a | |
262 | modified version of) readline's _rl_find_completion_word internal | |
263 | function. | |
264 | ||
265 | This function skips quoted substrings (characters between matched | |
266 | pairs of characters in rl_completer_quote_characters). We try to | |
267 | find an unclosed quoted substring on which to do matching. If one | |
268 | is not found, we use the word break characters to find the | |
269 | boundaries of the current word. QC, if non-null, is set to the | |
270 | opening quote character if we found an unclosed quoted substring, | |
271 | '\0' otherwise. DP, if non-null, is set to the value of the | |
272 | delimiter character that caused a word break. */ | |
273 | ||
274 | struct gdb_rl_completion_word_info | |
275 | { | |
276 | const char *word_break_characters; | |
277 | const char *quote_characters; | |
278 | const char *basic_quote_characters; | |
279 | }; | |
280 | ||
281 | static const char * | |
282 | gdb_rl_find_completion_word (struct gdb_rl_completion_word_info *info, | |
283 | int *qc, int *dp, | |
284 | const char *line_buffer) | |
285 | { | |
fa6ec8ef | 286 | int scan, end, delimiter, pass_next, isbrk; |
6a2c1b87 PA |
287 | char quote_char; |
288 | const char *brkchars; | |
289 | int point = strlen (line_buffer); | |
290 | ||
291 | /* The algorithm below does '--point'. Avoid buffer underflow with | |
292 | the empty string. */ | |
293 | if (point == 0) | |
294 | { | |
295 | if (qc != NULL) | |
296 | *qc = '\0'; | |
297 | if (dp != NULL) | |
298 | *dp = '\0'; | |
299 | return line_buffer; | |
300 | } | |
301 | ||
302 | end = point; | |
fa6ec8ef | 303 | delimiter = 0; |
6a2c1b87 PA |
304 | quote_char = '\0'; |
305 | ||
306 | brkchars = info->word_break_characters; | |
307 | ||
308 | if (info->quote_characters != NULL) | |
309 | { | |
310 | /* We have a list of characters which can be used in pairs to | |
311 | quote substrings for the completer. Try to find the start of | |
312 | an unclosed quoted substring. */ | |
6a2c1b87 PA |
313 | for (scan = pass_next = 0; |
314 | scan < end; | |
315 | scan++) | |
316 | { | |
317 | if (pass_next) | |
318 | { | |
319 | pass_next = 0; | |
320 | continue; | |
321 | } | |
322 | ||
323 | /* Shell-like semantics for single quotes -- don't allow | |
324 | backslash to quote anything in single quotes, especially | |
325 | not the closing quote. If you don't like this, take out | |
326 | the check on the value of quote_char. */ | |
327 | if (quote_char != '\'' && line_buffer[scan] == '\\') | |
328 | { | |
329 | pass_next = 1; | |
6a2c1b87 PA |
330 | continue; |
331 | } | |
332 | ||
333 | if (quote_char != '\0') | |
334 | { | |
335 | /* Ignore everything until the matching close quote | |
336 | char. */ | |
337 | if (line_buffer[scan] == quote_char) | |
338 | { | |
339 | /* Found matching close. Abandon this | |
340 | substring. */ | |
341 | quote_char = '\0'; | |
342 | point = end; | |
343 | } | |
344 | } | |
345 | else if (strchr (info->quote_characters, line_buffer[scan])) | |
346 | { | |
347 | /* Found start of a quoted substring. */ | |
348 | quote_char = line_buffer[scan]; | |
349 | point = scan + 1; | |
6a2c1b87 PA |
350 | } |
351 | } | |
352 | } | |
353 | ||
354 | if (point == end && quote_char == '\0') | |
355 | { | |
356 | /* We didn't find an unclosed quoted substring upon which to do | |
357 | completion, so use the word break characters to find the | |
358 | substring on which to complete. */ | |
359 | while (--point) | |
360 | { | |
361 | scan = line_buffer[point]; | |
362 | ||
363 | if (strchr (brkchars, scan) != 0) | |
364 | break; | |
365 | } | |
366 | } | |
367 | ||
368 | /* If we are at an unquoted word break, then advance past it. */ | |
369 | scan = line_buffer[point]; | |
370 | ||
371 | if (scan) | |
372 | { | |
373 | isbrk = strchr (brkchars, scan) != 0; | |
374 | ||
375 | if (isbrk) | |
376 | { | |
377 | /* If the character that caused the word break was a quoting | |
378 | character, then remember it as the delimiter. */ | |
379 | if (info->basic_quote_characters | |
380 | && strchr (info->basic_quote_characters, scan) | |
381 | && (end - point) > 1) | |
382 | delimiter = scan; | |
383 | ||
384 | point++; | |
385 | } | |
386 | } | |
387 | ||
388 | if (qc != NULL) | |
389 | *qc = quote_char; | |
390 | if (dp != NULL) | |
391 | *dp = delimiter; | |
392 | ||
393 | return line_buffer + point; | |
394 | } | |
395 | ||
e6ed716c PA |
396 | /* Find the completion word point for TEXT, emulating the algorithm |
397 | readline uses to find the word point, using WORD_BREAK_CHARACTERS | |
398 | as word break characters. */ | |
c6756f62 | 399 | |
e6ed716c PA |
400 | static const char * |
401 | advance_to_completion_word (completion_tracker &tracker, | |
402 | const char *word_break_characters, | |
4f440ff3 | 403 | const char *quote_characters, |
e6ed716c | 404 | const char *text) |
c6756f62 PA |
405 | { |
406 | gdb_rl_completion_word_info info; | |
407 | ||
e6ed716c | 408 | info.word_break_characters = word_break_characters; |
4f440ff3 | 409 | info.quote_characters = quote_characters; |
c6756f62 PA |
410 | info.basic_quote_characters = rl_basic_quote_characters; |
411 | ||
00b56dbe | 412 | int delimiter; |
c6756f62 | 413 | const char *start |
00b56dbe | 414 | = gdb_rl_find_completion_word (&info, NULL, &delimiter, text); |
c6756f62 PA |
415 | |
416 | tracker.advance_custom_word_point_by (start - text); | |
417 | ||
00b56dbe PA |
418 | if (delimiter) |
419 | { | |
420 | tracker.set_quote_char (delimiter); | |
421 | tracker.set_suppress_append_ws (true); | |
422 | } | |
423 | ||
c6756f62 PA |
424 | return start; |
425 | } | |
426 | ||
427 | /* See completer.h. */ | |
428 | ||
e6ed716c PA |
429 | const char * |
430 | advance_to_expression_complete_word_point (completion_tracker &tracker, | |
431 | const char *text) | |
432 | { | |
53fc67f8 | 433 | const char *brk_chars = current_language->word_break_characters (); |
4f440ff3 AB |
434 | const char *quote_chars = gdb_completer_expression_quote_characters; |
435 | return advance_to_completion_word (tracker, brk_chars, quote_chars, text); | |
e6ed716c PA |
436 | } |
437 | ||
438 | /* See completer.h. */ | |
439 | ||
440 | const char * | |
441 | advance_to_filename_complete_word_point (completion_tracker &tracker, | |
442 | const char *text) | |
443 | { | |
444 | const char *brk_chars = gdb_completer_file_name_break_characters; | |
4f440ff3 AB |
445 | const char *quote_chars = gdb_completer_file_name_quote_characters; |
446 | return advance_to_completion_word (tracker, brk_chars, quote_chars, text); | |
e6ed716c PA |
447 | } |
448 | ||
449 | /* See completer.h. */ | |
450 | ||
c6756f62 PA |
451 | bool |
452 | completion_tracker::completes_to_completion_word (const char *word) | |
453 | { | |
724fd9ba | 454 | recompute_lowest_common_denominator (); |
c6756f62 PA |
455 | if (m_lowest_common_denominator_unique) |
456 | { | |
457 | const char *lcd = m_lowest_common_denominator; | |
458 | ||
459 | if (strncmp_iw (word, lcd, strlen (lcd)) == 0) | |
460 | { | |
461 | /* Maybe skip the function and complete on keywords. */ | |
462 | size_t wordlen = strlen (word); | |
463 | if (word[wordlen - 1] == ' ') | |
464 | return true; | |
465 | } | |
466 | } | |
467 | ||
468 | return false; | |
469 | } | |
470 | ||
272d4594 PA |
471 | /* See completer.h. */ |
472 | ||
473 | void | |
474 | complete_nested_command_line (completion_tracker &tracker, const char *text) | |
475 | { | |
476 | /* Must be called from a custom-word-point completer. */ | |
477 | gdb_assert (tracker.use_custom_word_point ()); | |
478 | ||
479 | /* Disable the custom word point temporarily, because we want to | |
480 | probe whether the command we're completing itself uses a custom | |
481 | word point. */ | |
482 | tracker.set_use_custom_word_point (false); | |
483 | size_t save_custom_word_point = tracker.custom_word_point (); | |
484 | ||
485 | int quote_char = '\0'; | |
486 | const char *word = completion_find_completion_word (tracker, text, | |
487 | "e_char); | |
488 | ||
489 | if (tracker.use_custom_word_point ()) | |
490 | { | |
491 | /* The command we're completing uses a custom word point, so the | |
492 | tracker already contains the matches. We're done. */ | |
493 | return; | |
494 | } | |
495 | ||
496 | /* Restore the custom word point settings. */ | |
497 | tracker.set_custom_word_point (save_custom_word_point); | |
498 | tracker.set_use_custom_word_point (true); | |
499 | ||
500 | /* Run the handle_completions completer phase. */ | |
501 | complete_line (tracker, word, text, strlen (text)); | |
502 | } | |
503 | ||
87f0e720 | 504 | /* Complete on linespecs, which might be of two possible forms: |
c94fdfd0 EZ |
505 | |
506 | file:line | |
507 | or | |
508 | symbol+offset | |
509 | ||
aff410f1 MS |
510 | This is intended to be used in commands that set breakpoints |
511 | etc. */ | |
512 | ||
eb3ff9a5 PA |
513 | static void |
514 | complete_files_symbols (completion_tracker &tracker, | |
515 | const char *text, const char *word) | |
c94fdfd0 | 516 | { |
eb3ff9a5 | 517 | completion_list fn_list; |
6f937416 | 518 | const char *p; |
c94fdfd0 EZ |
519 | int quote_found = 0; |
520 | int quoted = *text == '\'' || *text == '"'; | |
521 | int quote_char = '\0'; | |
6f937416 | 522 | const char *colon = NULL; |
c94fdfd0 | 523 | char *file_to_match = NULL; |
6f937416 PA |
524 | const char *symbol_start = text; |
525 | const char *orig_text = text; | |
c94fdfd0 | 526 | |
59be2b6a | 527 | /* Do we have an unquoted colon, as in "break foo.c:bar"? */ |
c94fdfd0 EZ |
528 | for (p = text; *p != '\0'; ++p) |
529 | { | |
530 | if (*p == '\\' && p[1] == '\'') | |
531 | p++; | |
532 | else if (*p == '\'' || *p == '"') | |
533 | { | |
534 | quote_found = *p; | |
535 | quote_char = *p++; | |
536 | while (*p != '\0' && *p != quote_found) | |
537 | { | |
538 | if (*p == '\\' && p[1] == quote_found) | |
539 | p++; | |
540 | p++; | |
541 | } | |
542 | ||
543 | if (*p == quote_found) | |
544 | quote_found = 0; | |
545 | else | |
9c3f90bd | 546 | break; /* Hit the end of text. */ |
c94fdfd0 EZ |
547 | } |
548 | #if HAVE_DOS_BASED_FILE_SYSTEM | |
549 | /* If we have a DOS-style absolute file name at the beginning of | |
550 | TEXT, and the colon after the drive letter is the only colon | |
551 | we found, pretend the colon is not there. */ | |
552 | else if (p < text + 3 && *p == ':' && p == text + 1 + quoted) | |
553 | ; | |
554 | #endif | |
555 | else if (*p == ':' && !colon) | |
556 | { | |
557 | colon = p; | |
558 | symbol_start = p + 1; | |
559 | } | |
53fc67f8 | 560 | else if (strchr (current_language->word_break_characters (), *p)) |
c94fdfd0 EZ |
561 | symbol_start = p + 1; |
562 | } | |
563 | ||
564 | if (quoted) | |
565 | text++; | |
c94fdfd0 EZ |
566 | |
567 | /* Where is the file name? */ | |
568 | if (colon) | |
569 | { | |
570 | char *s; | |
571 | ||
572 | file_to_match = (char *) xmalloc (colon - text + 1); | |
bbfa2517 YQ |
573 | strncpy (file_to_match, text, colon - text); |
574 | file_to_match[colon - text] = '\0'; | |
c94fdfd0 EZ |
575 | /* Remove trailing colons and quotes from the file name. */ |
576 | for (s = file_to_match + (colon - text); | |
577 | s > file_to_match; | |
578 | s--) | |
579 | if (*s == ':' || *s == quote_char) | |
580 | *s = '\0'; | |
581 | } | |
582 | /* If the text includes a colon, they want completion only on a | |
583 | symbol name after the colon. Otherwise, we need to complete on | |
584 | symbols as well as on files. */ | |
585 | if (colon) | |
586 | { | |
c6756f62 PA |
587 | collect_file_symbol_completion_matches (tracker, |
588 | complete_symbol_mode::EXPRESSION, | |
b5ec771e | 589 | symbol_name_match_type::EXPRESSION, |
c6756f62 | 590 | symbol_start, word, |
eb3ff9a5 | 591 | file_to_match); |
c94fdfd0 EZ |
592 | xfree (file_to_match); |
593 | } | |
594 | else | |
595 | { | |
eb3ff9a5 PA |
596 | size_t text_len = strlen (text); |
597 | ||
c6756f62 PA |
598 | collect_symbol_completion_matches (tracker, |
599 | complete_symbol_mode::EXPRESSION, | |
b5ec771e | 600 | symbol_name_match_type::EXPRESSION, |
c6756f62 | 601 | symbol_start, word); |
c94fdfd0 EZ |
602 | /* If text includes characters which cannot appear in a file |
603 | name, they cannot be asking for completion on files. */ | |
eb3ff9a5 | 604 | if (strcspn (text, |
1f20ed91 | 605 | gdb_completer_file_name_break_characters) == text_len) |
c94fdfd0 EZ |
606 | fn_list = make_source_files_completion_list (text, text); |
607 | } | |
608 | ||
eb3ff9a5 | 609 | if (!fn_list.empty () && !tracker.have_completions ()) |
c94fdfd0 EZ |
610 | { |
611 | /* If we only have file names as possible completion, we should | |
612 | bring them in sync with what rl_complete expects. The | |
613 | problem is that if the user types "break /foo/b TAB", and the | |
614 | possible completions are "/foo/bar" and "/foo/baz" | |
615 | rl_complete expects us to return "bar" and "baz", without the | |
616 | leading directories, as possible completions, because `word' | |
617 | starts at the "b". But we ignore the value of `word' when we | |
618 | call make_source_files_completion_list above (because that | |
619 | would not DTRT when the completion results in both symbols | |
620 | and file names), so make_source_files_completion_list returns | |
621 | the full "/foo/bar" and "/foo/baz" strings. This produces | |
622 | wrong results when, e.g., there's only one possible | |
623 | completion, because rl_complete will prepend "/foo/" to each | |
624 | candidate completion. The loop below removes that leading | |
625 | part. */ | |
eb3ff9a5 | 626 | for (const auto &fn_up: fn_list) |
c94fdfd0 | 627 | { |
eb3ff9a5 PA |
628 | char *fn = fn_up.get (); |
629 | memmove (fn, fn + (word - text), strlen (fn) + 1 - (word - text)); | |
c94fdfd0 | 630 | } |
c94fdfd0 | 631 | } |
eb3ff9a5 PA |
632 | |
633 | tracker.add_completions (std::move (fn_list)); | |
634 | ||
635 | if (!tracker.have_completions ()) | |
c94fdfd0 EZ |
636 | { |
637 | /* No completions at all. As the final resort, try completing | |
638 | on the entire text as a symbol. */ | |
eb3ff9a5 | 639 | collect_symbol_completion_matches (tracker, |
c6756f62 | 640 | complete_symbol_mode::EXPRESSION, |
b5ec771e | 641 | symbol_name_match_type::EXPRESSION, |
eb3ff9a5 | 642 | orig_text, word); |
c94fdfd0 | 643 | } |
eb3ff9a5 PA |
644 | } |
645 | ||
c45ec17c PA |
646 | /* See completer.h. */ |
647 | ||
648 | completion_list | |
649 | complete_source_filenames (const char *text) | |
650 | { | |
651 | size_t text_len = strlen (text); | |
652 | ||
653 | /* If text includes characters which cannot appear in a file name, | |
654 | the user cannot be asking for completion on files. */ | |
655 | if (strcspn (text, | |
656 | gdb_completer_file_name_break_characters) | |
657 | == text_len) | |
658 | return make_source_files_completion_list (text, text); | |
659 | ||
660 | return {}; | |
661 | } | |
662 | ||
663 | /* Complete address and linespec locations. */ | |
664 | ||
665 | static void | |
666 | complete_address_and_linespec_locations (completion_tracker &tracker, | |
a20714ff PA |
667 | const char *text, |
668 | symbol_name_match_type match_type) | |
c45ec17c PA |
669 | { |
670 | if (*text == '*') | |
671 | { | |
672 | tracker.advance_custom_word_point_by (1); | |
673 | text++; | |
674 | const char *word | |
675 | = advance_to_expression_complete_word_point (tracker, text); | |
676 | complete_expression (tracker, text, word); | |
677 | } | |
678 | else | |
679 | { | |
a20714ff | 680 | linespec_complete (tracker, text, match_type); |
c45ec17c PA |
681 | } |
682 | } | |
683 | ||
c6756f62 PA |
684 | /* The explicit location options. Note that indexes into this array |
685 | must match the explicit_location_match_type enumerators. */ | |
c45ec17c | 686 | |
c6756f62 PA |
687 | static const char *const explicit_options[] = |
688 | { | |
689 | "-source", | |
690 | "-function", | |
a20714ff | 691 | "-qualified", |
c6756f62 PA |
692 | "-line", |
693 | "-label", | |
694 | NULL | |
695 | }; | |
696 | ||
697 | /* The probe modifier options. These can appear before a location in | |
698 | breakpoint commands. */ | |
699 | static const char *const probe_options[] = | |
700 | { | |
701 | "-probe", | |
702 | "-probe-stap", | |
703 | "-probe-dtrace", | |
704 | NULL | |
705 | }; | |
706 | ||
eb3ff9a5 | 707 | /* Returns STRING if not NULL, the empty string otherwise. */ |
c94fdfd0 | 708 | |
eb3ff9a5 PA |
709 | static const char * |
710 | string_or_empty (const char *string) | |
711 | { | |
712 | return string != NULL ? string : ""; | |
c94fdfd0 EZ |
713 | } |
714 | ||
87f0e720 KS |
715 | /* A helper function to collect explicit location matches for the given |
716 | LOCATION, which is attempting to match on WORD. */ | |
717 | ||
eb3ff9a5 PA |
718 | static void |
719 | collect_explicit_location_matches (completion_tracker &tracker, | |
264f9890 | 720 | location_spec *locspec, |
87f0e720 | 721 | enum explicit_location_match_type what, |
c6756f62 PA |
722 | const char *word, |
723 | const struct language_defn *language) | |
87f0e720 | 724 | { |
40d97ee2 PA |
725 | const explicit_location_spec *explicit_loc |
726 | = as_explicit_location_spec (locspec); | |
87f0e720 | 727 | |
a20714ff PA |
728 | /* True if the option expects an argument. */ |
729 | bool needs_arg = true; | |
730 | ||
c6756f62 PA |
731 | /* Note, in the various MATCH_* below, we complete on |
732 | explicit_loc->foo instead of WORD, because only the former will | |
733 | have already skipped past any quote char. */ | |
87f0e720 KS |
734 | switch (what) |
735 | { | |
736 | case MATCH_SOURCE: | |
737 | { | |
fde84194 TT |
738 | const char *source |
739 | = string_or_empty (explicit_loc->source_filename.get ()); | |
eb3ff9a5 | 740 | completion_list matches |
c6756f62 | 741 | = make_source_files_completion_list (source, source); |
eb3ff9a5 | 742 | tracker.add_completions (std::move (matches)); |
87f0e720 KS |
743 | } |
744 | break; | |
745 | ||
746 | case MATCH_FUNCTION: | |
747 | { | |
fde84194 TT |
748 | const char *function |
749 | = string_or_empty (explicit_loc->function_name.get ()); | |
c6756f62 | 750 | linespec_complete_function (tracker, function, |
a20714ff | 751 | explicit_loc->func_name_match_type, |
fde84194 | 752 | explicit_loc->source_filename.get ()); |
87f0e720 KS |
753 | } |
754 | break; | |
755 | ||
a20714ff PA |
756 | case MATCH_QUALIFIED: |
757 | needs_arg = false; | |
758 | break; | |
c6756f62 PA |
759 | case MATCH_LINE: |
760 | /* Nothing to offer. */ | |
761 | break; | |
762 | ||
87f0e720 | 763 | case MATCH_LABEL: |
a2459270 | 764 | { |
fde84194 | 765 | const char *label = string_or_empty (explicit_loc->label_name.get ()); |
a2459270 | 766 | linespec_complete_label (tracker, language, |
fde84194 TT |
767 | explicit_loc->source_filename.get (), |
768 | explicit_loc->function_name.get (), | |
a20714ff | 769 | explicit_loc->func_name_match_type, |
a2459270 PA |
770 | label); |
771 | } | |
87f0e720 KS |
772 | break; |
773 | ||
774 | default: | |
775 | gdb_assert_not_reached ("unhandled explicit_location_match_type"); | |
776 | } | |
c6756f62 | 777 | |
a20714ff | 778 | if (!needs_arg || tracker.completes_to_completion_word (word)) |
c6756f62 PA |
779 | { |
780 | tracker.discard_completions (); | |
781 | tracker.advance_custom_word_point_by (strlen (word)); | |
782 | complete_on_enum (tracker, explicit_options, "", ""); | |
783 | complete_on_enum (tracker, linespec_keywords, "", ""); | |
784 | } | |
785 | else if (!tracker.have_completions ()) | |
786 | { | |
787 | /* Maybe we have an unterminated linespec keyword at the tail of | |
788 | the string. Try completing on that. */ | |
789 | size_t wordlen = strlen (word); | |
790 | const char *keyword = word + wordlen; | |
791 | ||
792 | if (wordlen > 0 && keyword[-1] != ' ') | |
793 | { | |
794 | while (keyword > word && *keyword != ' ') | |
795 | keyword--; | |
796 | /* Don't complete on keywords if we'd be completing on the | |
797 | whole explicit linespec option. E.g., "b -function | |
798 | thr<tab>" should not complete to the "thread" | |
799 | keyword. */ | |
800 | if (keyword != word) | |
801 | { | |
f1735a53 | 802 | keyword = skip_spaces (keyword); |
c6756f62 PA |
803 | |
804 | tracker.advance_custom_word_point_by (keyword - word); | |
805 | complete_on_enum (tracker, linespec_keywords, keyword, keyword); | |
806 | } | |
807 | } | |
808 | else if (wordlen > 0 && keyword[-1] == ' ') | |
809 | { | |
810 | /* Assume that we're maybe past the explicit location | |
811 | argument, and we didn't manage to find any match because | |
812 | the user wants to create a pending breakpoint. Offer the | |
813 | keyword and explicit location options as possible | |
814 | completions. */ | |
815 | tracker.advance_custom_word_point_by (keyword - word); | |
816 | complete_on_enum (tracker, linespec_keywords, keyword, keyword); | |
817 | complete_on_enum (tracker, explicit_options, keyword, keyword); | |
818 | } | |
819 | } | |
87f0e720 KS |
820 | } |
821 | ||
c6756f62 PA |
822 | /* If the next word in *TEXT_P is any of the keywords in KEYWORDS, |
823 | then advance both TEXT_P and the word point in the tracker past the | |
824 | keyword and return the (0-based) index in the KEYWORDS array that | |
825 | matched. Otherwise, return -1. */ | |
87f0e720 | 826 | |
c6756f62 PA |
827 | static int |
828 | skip_keyword (completion_tracker &tracker, | |
829 | const char * const *keywords, const char **text_p) | |
87f0e720 | 830 | { |
c6756f62 | 831 | const char *text = *text_p; |
f1735a53 | 832 | const char *after = skip_to_space (text); |
c6756f62 | 833 | size_t len = after - text; |
87f0e720 | 834 | |
c6756f62 PA |
835 | if (text[len] != ' ') |
836 | return -1; | |
837 | ||
838 | int found = -1; | |
839 | for (int i = 0; keywords[i] != NULL; i++) | |
840 | { | |
841 | if (strncmp (keywords[i], text, len) == 0) | |
842 | { | |
843 | if (found == -1) | |
844 | found = i; | |
845 | else | |
846 | return -1; | |
847 | } | |
848 | } | |
849 | ||
850 | if (found != -1) | |
851 | { | |
852 | tracker.advance_custom_word_point_by (len + 1); | |
853 | text += len + 1; | |
854 | *text_p = text; | |
855 | return found; | |
856 | } | |
857 | ||
858 | return -1; | |
87f0e720 KS |
859 | } |
860 | ||
264f9890 | 861 | /* A completer function for explicit location specs. This function |
c6756f62 PA |
862 | completes both options ("-source", "-line", etc) and values. If |
863 | completing a quoted string, then QUOTED_ARG_START and | |
864 | QUOTED_ARG_END point to the quote characters. LANGUAGE is the | |
865 | current language. */ | |
87f0e720 | 866 | |
eb3ff9a5 | 867 | static void |
264f9890 PA |
868 | complete_explicit_location_spec (completion_tracker &tracker, |
869 | location_spec *locspec, | |
870 | const char *text, | |
871 | const language_defn *language, | |
872 | const char *quoted_arg_start, | |
873 | const char *quoted_arg_end) | |
87f0e720 | 874 | { |
c6756f62 PA |
875 | if (*text != '-') |
876 | return; | |
87f0e720 | 877 | |
c6756f62 | 878 | int keyword = skip_keyword (tracker, explicit_options, &text); |
87f0e720 | 879 | |
c6756f62 | 880 | if (keyword == -1) |
1f58f6c2 TBA |
881 | { |
882 | complete_on_enum (tracker, explicit_options, text, text); | |
883 | /* There are keywords that start with "-". Include them, too. */ | |
884 | complete_on_enum (tracker, linespec_keywords, text, text); | |
885 | } | |
c6756f62 | 886 | else |
87f0e720 | 887 | { |
c6756f62 PA |
888 | /* Completing on value. */ |
889 | enum explicit_location_match_type what | |
890 | = (explicit_location_match_type) keyword; | |
891 | ||
892 | if (quoted_arg_start != NULL && quoted_arg_end != NULL) | |
87f0e720 | 893 | { |
c6756f62 PA |
894 | if (quoted_arg_end[1] == '\0') |
895 | { | |
896 | /* If completing a quoted string with the cursor right | |
897 | at the terminating quote char, complete the | |
898 | completion word without interpretation, so that | |
899 | readline advances the cursor one whitespace past the | |
900 | quote, even if there's no match. This makes these | |
901 | cases behave the same: | |
902 | ||
903 | before: "b -function function()" | |
904 | after: "b -function function() " | |
905 | ||
906 | before: "b -function 'function()'" | |
907 | after: "b -function 'function()' " | |
908 | ||
909 | and trusts the user in this case: | |
910 | ||
911 | before: "b -function 'not_loaded_function_yet()'" | |
912 | after: "b -function 'not_loaded_function_yet()' " | |
913 | */ | |
b02f78f9 | 914 | tracker.add_completion (make_unique_xstrdup (text)); |
c6756f62 PA |
915 | } |
916 | else if (quoted_arg_end[1] == ' ') | |
917 | { | |
918 | /* We're maybe past the explicit location argument. | |
30baf67b | 919 | Skip the argument without interpretation, assuming the |
c6756f62 PA |
920 | user may want to create pending breakpoint. Offer |
921 | the keyword and explicit location options as possible | |
922 | completions. */ | |
923 | tracker.advance_custom_word_point_by (strlen (text)); | |
924 | complete_on_enum (tracker, linespec_keywords, "", ""); | |
925 | complete_on_enum (tracker, explicit_options, "", ""); | |
926 | } | |
927 | return; | |
928 | } | |
929 | ||
930 | /* Now gather matches */ | |
264f9890 | 931 | collect_explicit_location_matches (tracker, locspec, what, text, |
c6756f62 PA |
932 | language); |
933 | } | |
934 | } | |
87f0e720 | 935 | |
c6756f62 | 936 | /* A completer for locations. */ |
87f0e720 | 937 | |
c6756f62 PA |
938 | void |
939 | location_completer (struct cmd_list_element *ignore, | |
940 | completion_tracker &tracker, | |
c45ec17c | 941 | const char *text, const char * /* word */) |
c6756f62 PA |
942 | { |
943 | int found_probe_option = -1; | |
944 | ||
945 | /* If we have a probe modifier, skip it. This can only appear as | |
946 | first argument. Until we have a specific completer for probes, | |
947 | falling back to the linespec completer for the remainder of the | |
948 | line is better than nothing. */ | |
949 | if (text[0] == '-' && text[1] == 'p') | |
950 | found_probe_option = skip_keyword (tracker, probe_options, &text); | |
951 | ||
952 | const char *option_text = text; | |
953 | int saved_word_point = tracker.custom_word_point (); | |
954 | ||
955 | const char *copy = text; | |
956 | ||
957 | explicit_completion_info completion_info; | |
264f9890 PA |
958 | location_spec_up locspec |
959 | = string_to_explicit_location_spec (©, current_language, | |
960 | &completion_info); | |
c6756f62 PA |
961 | if (completion_info.quoted_arg_start != NULL |
962 | && completion_info.quoted_arg_end == NULL) | |
963 | { | |
964 | /* Found an unbalanced quote. */ | |
965 | tracker.set_quote_char (*completion_info.quoted_arg_start); | |
966 | tracker.advance_custom_word_point_by (1); | |
87f0e720 | 967 | } |
c6756f62 | 968 | |
264f9890 | 969 | if (completion_info.saw_explicit_location_spec_option) |
87f0e720 | 970 | { |
c6756f62 | 971 | if (*copy != '\0') |
87f0e720 | 972 | { |
c6756f62 PA |
973 | tracker.advance_custom_word_point_by (copy - text); |
974 | text = copy; | |
975 | ||
976 | /* We found a terminator at the tail end of the string, | |
977 | which means we're past the explicit location options. We | |
978 | may have a keyword to complete on. If we have a whole | |
979 | keyword, then complete whatever comes after as an | |
980 | expression. This is mainly for the "if" keyword. If the | |
981 | "thread" and "task" keywords gain their own completers, | |
982 | they should be used here. */ | |
983 | int keyword = skip_keyword (tracker, linespec_keywords, &text); | |
984 | ||
985 | if (keyword == -1) | |
986 | { | |
987 | complete_on_enum (tracker, linespec_keywords, text, text); | |
988 | } | |
989 | else | |
990 | { | |
991 | const char *word | |
992 | = advance_to_expression_complete_word_point (tracker, text); | |
993 | complete_expression (tracker, text, word); | |
994 | } | |
87f0e720 | 995 | } |
c6756f62 | 996 | else |
87f0e720 | 997 | { |
c6756f62 PA |
998 | tracker.advance_custom_word_point_by (completion_info.last_option |
999 | - text); | |
1000 | text = completion_info.last_option; | |
1001 | ||
264f9890 PA |
1002 | complete_explicit_location_spec (tracker, locspec.get (), text, |
1003 | current_language, | |
1004 | completion_info.quoted_arg_start, | |
1005 | completion_info.quoted_arg_end); | |
c6756f62 | 1006 | |
87f0e720 | 1007 | } |
c6756f62 | 1008 | } |
a20714ff | 1009 | /* This is an address or linespec location. */ |
264f9890 | 1010 | else if (locspec != nullptr) |
a20714ff PA |
1011 | { |
1012 | /* Handle non-explicit location options. */ | |
1013 | ||
1014 | int keyword = skip_keyword (tracker, explicit_options, &text); | |
1015 | if (keyword == -1) | |
1016 | complete_on_enum (tracker, explicit_options, text, text); | |
1017 | else | |
1018 | { | |
1019 | tracker.advance_custom_word_point_by (copy - text); | |
1020 | text = copy; | |
1021 | ||
1022 | symbol_name_match_type match_type | |
40d97ee2 | 1023 | = as_explicit_location_spec (locspec.get ())->func_name_match_type; |
a20714ff PA |
1024 | complete_address_and_linespec_locations (tracker, text, match_type); |
1025 | } | |
1026 | } | |
c6756f62 PA |
1027 | else |
1028 | { | |
a20714ff PA |
1029 | /* No options. */ |
1030 | complete_address_and_linespec_locations (tracker, text, | |
1031 | symbol_name_match_type::WILD); | |
c6756f62 | 1032 | } |
87f0e720 | 1033 | |
c6756f62 | 1034 | /* Add matches for option names, if either: |
87f0e720 | 1035 | |
c6756f62 PA |
1036 | - Some completer above found some matches, but the word point did |
1037 | not advance (e.g., "b <tab>" finds all functions, or "b -<tab>" | |
1038 | matches all objc selectors), or; | |
1039 | ||
1040 | - Some completer above advanced the word point, but found no | |
1041 | matches. | |
1042 | */ | |
1043 | if ((text[0] == '-' || text[0] == '\0') | |
1044 | && (!tracker.have_completions () | |
1045 | || tracker.custom_word_point () == saved_word_point)) | |
1046 | { | |
1047 | tracker.set_custom_word_point (saved_word_point); | |
1048 | text = option_text; | |
1049 | ||
1050 | if (found_probe_option == -1) | |
1051 | complete_on_enum (tracker, probe_options, text, text); | |
1052 | complete_on_enum (tracker, explicit_options, text, text); | |
87f0e720 | 1053 | } |
87f0e720 KS |
1054 | } |
1055 | ||
c6756f62 PA |
1056 | /* The corresponding completer_handle_brkchars |
1057 | implementation. */ | |
87f0e720 | 1058 | |
c6756f62 PA |
1059 | static void |
1060 | location_completer_handle_brkchars (struct cmd_list_element *ignore, | |
1061 | completion_tracker &tracker, | |
1062 | const char *text, | |
1063 | const char *word_ignored) | |
87f0e720 | 1064 | { |
c6756f62 | 1065 | tracker.set_use_custom_word_point (true); |
87f0e720 | 1066 | |
c6756f62 | 1067 | location_completer (ignore, tracker, text, NULL); |
87f0e720 KS |
1068 | } |
1069 | ||
c45ec17c | 1070 | /* See completer.h. */ |
eb3ff9a5 | 1071 | |
c45ec17c | 1072 | void |
eb3ff9a5 PA |
1073 | complete_expression (completion_tracker &tracker, |
1074 | const char *text, const char *word) | |
65d12d83 | 1075 | { |
1e237aba TT |
1076 | expression_up exp; |
1077 | std::unique_ptr<expr_completion_base> expr_completer; | |
65d12d83 TT |
1078 | |
1079 | /* Perform a tentative parse of the expression, to see whether a | |
1080 | field completion is required. */ | |
a70b8144 | 1081 | try |
c92817ce | 1082 | { |
1e237aba | 1083 | exp = parse_expression_for_completion (text, &expr_completer); |
c92817ce | 1084 | } |
230d2906 | 1085 | catch (const gdb_exception_error &except) |
492d29ea | 1086 | { |
eb3ff9a5 | 1087 | return; |
492d29ea | 1088 | } |
492d29ea | 1089 | |
1e237aba TT |
1090 | /* Part of the parse_expression_for_completion contract. */ |
1091 | gdb_assert ((exp == nullptr) == (expr_completer == nullptr)); | |
1092 | if (expr_completer != nullptr | |
1093 | && expr_completer->complete (exp.get (), tracker)) | |
1094 | return; | |
65d12d83 | 1095 | |
eb3ff9a5 PA |
1096 | complete_files_symbols (tracker, text, word); |
1097 | } | |
1098 | ||
1099 | /* Complete on expressions. Often this means completing on symbol | |
1100 | names, but some language parsers also have support for completing | |
1101 | field names. */ | |
1102 | ||
1103 | void | |
1104 | expression_completer (struct cmd_list_element *ignore, | |
1105 | completion_tracker &tracker, | |
1106 | const char *text, const char *word) | |
1107 | { | |
1108 | complete_expression (tracker, text, word); | |
65d12d83 TT |
1109 | } |
1110 | ||
7d793aa9 SDJ |
1111 | /* See definition in completer.h. */ |
1112 | ||
67cb5b2d PA |
1113 | void |
1114 | set_rl_completer_word_break_characters (const char *break_chars) | |
1115 | { | |
1116 | rl_completer_word_break_characters = (char *) break_chars; | |
1117 | } | |
1118 | ||
78b13106 PA |
1119 | /* Complete on symbols. */ |
1120 | ||
eb3ff9a5 | 1121 | void |
78b13106 | 1122 | symbol_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1123 | completion_tracker &tracker, |
78b13106 PA |
1124 | const char *text, const char *word) |
1125 | { | |
c6756f62 | 1126 | collect_symbol_completion_matches (tracker, complete_symbol_mode::EXPRESSION, |
b5ec771e | 1127 | symbol_name_match_type::EXPRESSION, |
c6756f62 | 1128 | text, word); |
78b13106 PA |
1129 | } |
1130 | ||
aff410f1 MS |
1131 | /* Here are some useful test cases for completion. FIXME: These |
1132 | should be put in the test suite. They should be tested with both | |
1133 | M-? and TAB. | |
c5f0f3d0 FN |
1134 | |
1135 | "show output-" "radix" | |
1136 | "show output" "-radix" | |
1137 | "p" ambiguous (commands starting with p--path, print, printf, etc.) | |
1138 | "p " ambiguous (all symbols) | |
1139 | "info t foo" no completions | |
1140 | "info t " no completions | |
1141 | "info t" ambiguous ("info target", "info terminal", etc.) | |
1142 | "info ajksdlfk" no completions | |
1143 | "info ajksdlfk " no completions | |
1144 | "info" " " | |
1145 | "info " ambiguous (all info commands) | |
1146 | "p \"a" no completions (string constant) | |
1147 | "p 'a" ambiguous (all symbols starting with a) | |
1148 | "p b-a" ambiguous (all symbols starting with a) | |
1149 | "p b-" ambiguous (all symbols) | |
1150 | "file Make" "file" (word break hard to screw up here) | |
1151 | "file ../gdb.stabs/we" "ird" (needs to not break word at slash) | |
1152 | */ | |
1153 | ||
eb3ff9a5 | 1154 | enum complete_line_internal_reason |
67c296a2 | 1155 | { |
eb3ff9a5 | 1156 | /* Preliminary phase, called by gdb_completion_word_break_characters |
c6756f62 PA |
1157 | function, is used to either: |
1158 | ||
1159 | #1 - Determine the set of chars that are word delimiters | |
1160 | depending on the current command in line_buffer. | |
1161 | ||
1162 | #2 - Manually advance RL_POINT to the "word break" point instead | |
1163 | of letting readline do it (based on too-simple character | |
1164 | matching). | |
1165 | ||
1166 | Simpler completers that just pass a brkchars array to readline | |
1167 | (#1 above) must defer generating the completions to the main | |
1168 | phase (below). No completion list should be generated in this | |
1169 | phase. | |
1170 | ||
1171 | OTOH, completers that manually advance the word point(#2 above) | |
1172 | must set "use_custom_word_point" in the tracker and generate | |
1173 | their completion in this phase. Note that this is the convenient | |
1174 | thing to do since they'll be parsing the input line anyway. */ | |
67c296a2 | 1175 | handle_brkchars, |
eb3ff9a5 PA |
1176 | |
1177 | /* Main phase, called by complete_line function, is used to get the | |
1178 | list of possible completions. */ | |
67c296a2 | 1179 | handle_completions, |
eb3ff9a5 PA |
1180 | |
1181 | /* Special case when completing a 'help' command. In this case, | |
1182 | once sub-command completions are exhausted, we simply return | |
1183 | NULL. */ | |
1184 | handle_help, | |
1185 | }; | |
67c296a2 | 1186 | |
6e1dbf8c PA |
1187 | /* Helper for complete_line_internal to simplify it. */ |
1188 | ||
eb3ff9a5 PA |
1189 | static void |
1190 | complete_line_internal_normal_command (completion_tracker &tracker, | |
1191 | const char *command, const char *word, | |
6e1dbf8c PA |
1192 | const char *cmd_args, |
1193 | complete_line_internal_reason reason, | |
1194 | struct cmd_list_element *c) | |
1195 | { | |
6e1dbf8c PA |
1196 | if (reason == handle_brkchars) |
1197 | { | |
1198 | completer_handle_brkchars_ftype *brkchars_fn; | |
1199 | ||
1200 | if (c->completer_handle_brkchars != NULL) | |
1201 | brkchars_fn = c->completer_handle_brkchars; | |
1202 | else | |
1203 | { | |
1204 | brkchars_fn | |
1205 | = (completer_handle_brkchars_func_for_completer | |
1206 | (c->completer)); | |
1207 | } | |
1208 | ||
c66e8e5c | 1209 | brkchars_fn (c, tracker, cmd_args, word); |
6e1dbf8c PA |
1210 | } |
1211 | ||
1212 | if (reason != handle_brkchars && c->completer != NULL) | |
c66e8e5c | 1213 | (*c->completer) (c, tracker, cmd_args, word); |
6e1dbf8c | 1214 | } |
67c296a2 PM |
1215 | |
1216 | /* Internal function used to handle completions. | |
1217 | ||
c5f0f3d0 FN |
1218 | |
1219 | TEXT is the caller's idea of the "word" we are looking at. | |
1220 | ||
aff410f1 MS |
1221 | LINE_BUFFER is available to be looked at; it contains the entire |
1222 | text of the line. POINT is the offset in that line of the cursor. | |
1223 | You should pretend that the line ends at POINT. | |
67c296a2 | 1224 | |
eb3ff9a5 | 1225 | See complete_line_internal_reason for description of REASON. */ |
14032a66 | 1226 | |
eb3ff9a5 PA |
1227 | static void |
1228 | complete_line_internal_1 (completion_tracker &tracker, | |
1229 | const char *text, | |
1230 | const char *line_buffer, int point, | |
1231 | complete_line_internal_reason reason) | |
c5f0f3d0 | 1232 | { |
6f937416 PA |
1233 | char *tmp_command; |
1234 | const char *p; | |
ace21957 | 1235 | int ignore_help_classes; |
c5f0f3d0 | 1236 | /* Pointer within tmp_command which corresponds to text. */ |
eb3ff9a5 | 1237 | const char *word; |
c5f0f3d0 FN |
1238 | struct cmd_list_element *c, *result_list; |
1239 | ||
aff410f1 MS |
1240 | /* Choose the default set of word break characters to break |
1241 | completions. If we later find out that we are doing completions | |
1242 | on command strings (as opposed to strings supplied by the | |
1243 | individual command completer functions, which can be any string) | |
1244 | then we will switch to the special word break set for command | |
be09caf1 | 1245 | strings, which leaves out the '-' and '.' character used in some |
aff410f1 | 1246 | commands. */ |
67cb5b2d | 1247 | set_rl_completer_word_break_characters |
53fc67f8 | 1248 | (current_language->word_break_characters ()); |
c5f0f3d0 | 1249 | |
4f440ff3 AB |
1250 | /* Likewise for the quote characters. If we later find out that we are |
1251 | completing file names then we can switch to the file name quote | |
1252 | character set (i.e., both single- and double-quotes). */ | |
1253 | rl_completer_quote_characters = gdb_completer_expression_quote_characters; | |
5792be92 | 1254 | |
aff410f1 MS |
1255 | /* Decide whether to complete on a list of gdb commands or on |
1256 | symbols. */ | |
83d31a92 TT |
1257 | tmp_command = (char *) alloca (point + 1); |
1258 | p = tmp_command; | |
c5f0f3d0 | 1259 | |
ace21957 MF |
1260 | /* The help command should complete help aliases. */ |
1261 | ignore_help_classes = reason != handle_help; | |
1262 | ||
83d31a92 TT |
1263 | strncpy (tmp_command, line_buffer, point); |
1264 | tmp_command[point] = '\0'; | |
eb3ff9a5 PA |
1265 | if (reason == handle_brkchars) |
1266 | { | |
1267 | gdb_assert (text == NULL); | |
1268 | word = NULL; | |
1269 | } | |
1270 | else | |
1271 | { | |
1272 | /* Since text always contains some number of characters leading up | |
1273 | to point, we can find the equivalent position in tmp_command | |
1274 | by subtracting that many characters from the end of tmp_command. */ | |
1275 | word = tmp_command + point - strlen (text); | |
1276 | } | |
c5f0f3d0 | 1277 | |
a81aaca0 PA |
1278 | /* Move P up to the start of the command. */ |
1279 | p = skip_spaces (p); | |
1280 | ||
1281 | if (*p == '\0') | |
83d31a92 | 1282 | { |
a81aaca0 PA |
1283 | /* An empty line is ambiguous; that is, it could be any |
1284 | command. */ | |
1427fe5e | 1285 | c = CMD_LIST_AMBIGUOUS; |
83d31a92 TT |
1286 | result_list = 0; |
1287 | } | |
1288 | else | |
1536146f AB |
1289 | c = lookup_cmd_1 (&p, cmdlist, &result_list, NULL, ignore_help_classes, |
1290 | true); | |
c5f0f3d0 | 1291 | |
83d31a92 TT |
1292 | /* Move p up to the next interesting thing. */ |
1293 | while (*p == ' ' || *p == '\t') | |
1294 | { | |
1295 | p++; | |
1296 | } | |
c5f0f3d0 | 1297 | |
c6756f62 PA |
1298 | tracker.advance_custom_word_point_by (p - tmp_command); |
1299 | ||
83d31a92 TT |
1300 | if (!c) |
1301 | { | |
1302 | /* It is an unrecognized command. So there are no | |
1303 | possible completions. */ | |
83d31a92 | 1304 | } |
1427fe5e | 1305 | else if (c == CMD_LIST_AMBIGUOUS) |
83d31a92 | 1306 | { |
6f937416 | 1307 | const char *q; |
83d31a92 TT |
1308 | |
1309 | /* lookup_cmd_1 advances p up to the first ambiguous thing, but | |
1310 | doesn't advance over that thing itself. Do so now. */ | |
1311 | q = p; | |
be09caf1 | 1312 | while (valid_cmd_char_p (*q)) |
83d31a92 TT |
1313 | ++q; |
1314 | if (q != tmp_command + point) | |
c5f0f3d0 | 1315 | { |
83d31a92 TT |
1316 | /* There is something beyond the ambiguous |
1317 | command, so there are no possible completions. For | |
1318 | example, "info t " or "info t foo" does not complete | |
1319 | to anything, because "info t" can be "info target" or | |
1320 | "info terminal". */ | |
c5f0f3d0 | 1321 | } |
83d31a92 | 1322 | else |
c5f0f3d0 | 1323 | { |
83d31a92 TT |
1324 | /* We're trying to complete on the command which was ambiguous. |
1325 | This we can deal with. */ | |
1326 | if (result_list) | |
c5f0f3d0 | 1327 | { |
67c296a2 | 1328 | if (reason != handle_brkchars) |
14b42fc4 | 1329 | complete_on_cmdlist (*result_list->subcommands, tracker, p, |
eb3ff9a5 | 1330 | word, ignore_help_classes); |
c5f0f3d0 FN |
1331 | } |
1332 | else | |
1333 | { | |
67c296a2 | 1334 | if (reason != handle_brkchars) |
eb3ff9a5 PA |
1335 | complete_on_cmdlist (cmdlist, tracker, p, word, |
1336 | ignore_help_classes); | |
c5f0f3d0 | 1337 | } |
489f0516 | 1338 | /* Ensure that readline does the right thing with respect to |
83d31a92 | 1339 | inserting quotes. */ |
67cb5b2d PA |
1340 | set_rl_completer_word_break_characters |
1341 | (gdb_completer_command_word_break_characters); | |
c5f0f3d0 | 1342 | } |
83d31a92 TT |
1343 | } |
1344 | else | |
1345 | { | |
1346 | /* We've recognized a full command. */ | |
1347 | ||
1348 | if (p == tmp_command + point) | |
c5f0f3d0 | 1349 | { |
aff410f1 MS |
1350 | /* There is no non-whitespace in the line beyond the |
1351 | command. */ | |
c5f0f3d0 | 1352 | |
83d31a92 | 1353 | if (p[-1] == ' ' || p[-1] == '\t') |
c5f0f3d0 | 1354 | { |
aff410f1 MS |
1355 | /* The command is followed by whitespace; we need to |
1356 | complete on whatever comes after command. */ | |
3d0b3564 | 1357 | if (c->is_prefix ()) |
c5f0f3d0 | 1358 | { |
83d31a92 TT |
1359 | /* It is a prefix command; what comes after it is |
1360 | a subcommand (e.g. "info "). */ | |
67c296a2 | 1361 | if (reason != handle_brkchars) |
14b42fc4 | 1362 | complete_on_cmdlist (*c->subcommands, tracker, p, word, |
eb3ff9a5 | 1363 | ignore_help_classes); |
c5f0f3d0 | 1364 | |
489f0516 | 1365 | /* Ensure that readline does the right thing |
9c3f90bd | 1366 | with respect to inserting quotes. */ |
67cb5b2d PA |
1367 | set_rl_completer_word_break_characters |
1368 | (gdb_completer_command_word_break_characters); | |
c5f0f3d0 | 1369 | } |
67c296a2 | 1370 | else if (reason == handle_help) |
eb3ff9a5 | 1371 | ; |
c5f0f3d0 FN |
1372 | else if (c->enums) |
1373 | { | |
67c296a2 | 1374 | if (reason != handle_brkchars) |
eb3ff9a5 | 1375 | complete_on_enum (tracker, c->enums, p, word); |
67cb5b2d PA |
1376 | set_rl_completer_word_break_characters |
1377 | (gdb_completer_command_word_break_characters); | |
c5f0f3d0 FN |
1378 | } |
1379 | else | |
1380 | { | |
83d31a92 TT |
1381 | /* It is a normal command; what comes after it is |
1382 | completed by the command's completer function. */ | |
eb3ff9a5 PA |
1383 | complete_line_internal_normal_command (tracker, |
1384 | tmp_command, word, p, | |
1385 | reason, c); | |
c5f0f3d0 FN |
1386 | } |
1387 | } | |
83d31a92 TT |
1388 | else |
1389 | { | |
1390 | /* The command is not followed by whitespace; we need to | |
aff410f1 | 1391 | complete on the command itself, e.g. "p" which is a |
83d31a92 TT |
1392 | command itself but also can complete to "print", "ptype" |
1393 | etc. */ | |
6f937416 | 1394 | const char *q; |
83d31a92 TT |
1395 | |
1396 | /* Find the command we are completing on. */ | |
1397 | q = p; | |
1398 | while (q > tmp_command) | |
1399 | { | |
be09caf1 | 1400 | if (valid_cmd_char_p (q[-1])) |
83d31a92 TT |
1401 | --q; |
1402 | else | |
1403 | break; | |
1404 | } | |
1405 | ||
3844e605 PA |
1406 | /* Move the custom word point back too. */ |
1407 | tracker.advance_custom_word_point_by (q - p); | |
1408 | ||
67c296a2 | 1409 | if (reason != handle_brkchars) |
eb3ff9a5 PA |
1410 | complete_on_cmdlist (result_list, tracker, q, word, |
1411 | ignore_help_classes); | |
83d31a92 | 1412 | |
489f0516 | 1413 | /* Ensure that readline does the right thing |
9c3f90bd | 1414 | with respect to inserting quotes. */ |
67cb5b2d PA |
1415 | set_rl_completer_word_break_characters |
1416 | (gdb_completer_command_word_break_characters); | |
83d31a92 TT |
1417 | } |
1418 | } | |
67c296a2 | 1419 | else if (reason == handle_help) |
eb3ff9a5 | 1420 | ; |
83d31a92 TT |
1421 | else |
1422 | { | |
1423 | /* There is non-whitespace beyond the command. */ | |
1424 | ||
3d0b3564 | 1425 | if (c->is_prefix () && !c->allow_unknown) |
83d31a92 TT |
1426 | { |
1427 | /* It is an unrecognized subcommand of a prefix command, | |
1428 | e.g. "info adsfkdj". */ | |
83d31a92 TT |
1429 | } |
1430 | else if (c->enums) | |
1431 | { | |
67c296a2 | 1432 | if (reason != handle_brkchars) |
eb3ff9a5 | 1433 | complete_on_enum (tracker, c->enums, p, word); |
83d31a92 TT |
1434 | } |
1435 | else | |
1436 | { | |
1437 | /* It is a normal command. */ | |
eb3ff9a5 PA |
1438 | complete_line_internal_normal_command (tracker, |
1439 | tmp_command, word, p, | |
1440 | reason, c); | |
83d31a92 TT |
1441 | } |
1442 | } | |
1443 | } | |
83d31a92 | 1444 | } |
ef0b411a | 1445 | |
eb3ff9a5 PA |
1446 | /* Wrapper around complete_line_internal_1 to handle |
1447 | MAX_COMPLETIONS_REACHED_ERROR. */ | |
ef0b411a | 1448 | |
eb3ff9a5 PA |
1449 | static void |
1450 | complete_line_internal (completion_tracker &tracker, | |
1451 | const char *text, | |
1452 | const char *line_buffer, int point, | |
1453 | complete_line_internal_reason reason) | |
1454 | { | |
a70b8144 | 1455 | try |
eb3ff9a5 PA |
1456 | { |
1457 | complete_line_internal_1 (tracker, text, line_buffer, point, reason); | |
1458 | } | |
230d2906 | 1459 | catch (const gdb_exception_error &except) |
eb3ff9a5 PA |
1460 | { |
1461 | if (except.error != MAX_COMPLETIONS_REACHED_ERROR) | |
eedc3f4f | 1462 | throw; |
eb3ff9a5 PA |
1463 | } |
1464 | } | |
ef0b411a GB |
1465 | |
1466 | /* See completer.h. */ | |
1467 | ||
eb3ff9a5 | 1468 | int max_completions = 200; |
ef0b411a | 1469 | |
eb3ff9a5 PA |
1470 | /* Initial size of the table. It automagically grows from here. */ |
1471 | #define INITIAL_COMPLETION_HTAB_SIZE 200 | |
ef0b411a | 1472 | |
eb3ff9a5 | 1473 | /* See completer.h. */ |
ef0b411a | 1474 | |
3b9ff5d9 AB |
1475 | completion_tracker::completion_tracker (bool from_readline) |
1476 | : m_from_readline (from_readline) | |
ef0b411a | 1477 | { |
724fd9ba | 1478 | discard_completions (); |
ef0b411a GB |
1479 | } |
1480 | ||
1481 | /* See completer.h. */ | |
1482 | ||
c6756f62 PA |
1483 | void |
1484 | completion_tracker::discard_completions () | |
1485 | { | |
1486 | xfree (m_lowest_common_denominator); | |
1487 | m_lowest_common_denominator = NULL; | |
1488 | ||
1489 | m_lowest_common_denominator_unique = false; | |
724fd9ba AB |
1490 | m_lowest_common_denominator_valid = false; |
1491 | ||
32580f6d | 1492 | m_entries_hash.reset (nullptr); |
724fd9ba AB |
1493 | |
1494 | /* A callback used by the hash table to compare new entries with existing | |
2698f5ea | 1495 | entries. We can't use the standard htab_eq_string function here as the |
724fd9ba AB |
1496 | key to our hash is just a single string, while the values we store in |
1497 | the hash are a struct containing multiple strings. */ | |
1498 | static auto entry_eq_func | |
1499 | = [] (const void *first, const void *second) -> int | |
1500 | { | |
1501 | /* The FIRST argument is the entry already in the hash table, and | |
1502 | the SECOND argument is the new item being inserted. */ | |
1503 | const completion_hash_entry *entry | |
1504 | = (const completion_hash_entry *) first; | |
1505 | const char *name_str = (const char *) second; | |
c6756f62 | 1506 | |
724fd9ba AB |
1507 | return entry->is_name_eq (name_str); |
1508 | }; | |
c6756f62 | 1509 | |
99f1bc6a AB |
1510 | /* Callback used by the hash table to compute the hash value for an |
1511 | existing entry. This is needed when expanding the hash table. */ | |
1512 | static auto entry_hash_func | |
1513 | = [] (const void *arg) -> hashval_t | |
1514 | { | |
1515 | const completion_hash_entry *entry | |
1516 | = (const completion_hash_entry *) arg; | |
1517 | return entry->hash_name (); | |
1518 | }; | |
1519 | ||
ef5f598c TT |
1520 | m_entries_hash.reset |
1521 | (htab_create_alloc (INITIAL_COMPLETION_HTAB_SIZE, | |
1522 | entry_hash_func, entry_eq_func, | |
1523 | htab_delete_entry<completion_hash_entry>, | |
1524 | xcalloc, xfree)); | |
c6756f62 PA |
1525 | } |
1526 | ||
1527 | /* See completer.h. */ | |
1528 | ||
eb3ff9a5 | 1529 | completion_tracker::~completion_tracker () |
ef0b411a | 1530 | { |
eb3ff9a5 | 1531 | xfree (m_lowest_common_denominator); |
ef0b411a GB |
1532 | } |
1533 | ||
1534 | /* See completer.h. */ | |
1535 | ||
eb3ff9a5 | 1536 | bool |
a207cff2 PA |
1537 | completion_tracker::maybe_add_completion |
1538 | (gdb::unique_xmalloc_ptr<char> name, | |
a22ecf70 PA |
1539 | completion_match_for_lcd *match_for_lcd, |
1540 | const char *text, const char *word) | |
ef0b411a GB |
1541 | { |
1542 | void **slot; | |
1543 | ||
ef0b411a | 1544 | if (max_completions == 0) |
eb3ff9a5 | 1545 | return false; |
ef0b411a | 1546 | |
32580f6d | 1547 | if (htab_elements (m_entries_hash.get ()) >= max_completions) |
eb3ff9a5 | 1548 | return false; |
ef0b411a | 1549 | |
724fd9ba | 1550 | hashval_t hash = htab_hash_string (name.get ()); |
32580f6d TT |
1551 | slot = htab_find_slot_with_hash (m_entries_hash.get (), name.get (), |
1552 | hash, INSERT); | |
eb3ff9a5 PA |
1553 | if (*slot == HTAB_EMPTY_ENTRY) |
1554 | { | |
a207cff2 PA |
1555 | const char *match_for_lcd_str = NULL; |
1556 | ||
1557 | if (match_for_lcd != NULL) | |
1558 | match_for_lcd_str = match_for_lcd->finish (); | |
1559 | ||
1560 | if (match_for_lcd_str == NULL) | |
1561 | match_for_lcd_str = name.get (); | |
ef0b411a | 1562 | |
a22ecf70 PA |
1563 | gdb::unique_xmalloc_ptr<char> lcd |
1564 | = make_completion_match_str (match_for_lcd_str, text, word); | |
1565 | ||
724fd9ba AB |
1566 | size_t lcd_len = strlen (lcd.get ()); |
1567 | *slot = new completion_hash_entry (std::move (name), std::move (lcd)); | |
ef0b411a | 1568 | |
724fd9ba AB |
1569 | m_lowest_common_denominator_valid = false; |
1570 | m_lowest_common_denominator_max_length | |
1571 | = std::max (m_lowest_common_denominator_max_length, lcd_len); | |
eb3ff9a5 | 1572 | } |
ef0b411a | 1573 | |
eb3ff9a5 PA |
1574 | return true; |
1575 | } | |
1576 | ||
1577 | /* See completer.h. */ | |
ef0b411a | 1578 | |
eb3ff9a5 | 1579 | void |
a207cff2 | 1580 | completion_tracker::add_completion (gdb::unique_xmalloc_ptr<char> name, |
a22ecf70 PA |
1581 | completion_match_for_lcd *match_for_lcd, |
1582 | const char *text, const char *word) | |
eb3ff9a5 | 1583 | { |
a22ecf70 | 1584 | if (!maybe_add_completion (std::move (name), match_for_lcd, text, word)) |
eb3ff9a5 | 1585 | throw_error (MAX_COMPLETIONS_REACHED_ERROR, _("Max completions reached.")); |
ef0b411a GB |
1586 | } |
1587 | ||
eb3ff9a5 PA |
1588 | /* See completer.h. */ |
1589 | ||
ef0b411a | 1590 | void |
eb3ff9a5 | 1591 | completion_tracker::add_completions (completion_list &&list) |
ef0b411a | 1592 | { |
eb3ff9a5 PA |
1593 | for (auto &candidate : list) |
1594 | add_completion (std::move (candidate)); | |
ef0b411a GB |
1595 | } |
1596 | ||
19a2740f AB |
1597 | /* See completer.h. */ |
1598 | ||
1599 | void | |
1600 | completion_tracker::remove_completion (const char *name) | |
1601 | { | |
1602 | hashval_t hash = htab_hash_string (name); | |
32580f6d | 1603 | if (htab_find_slot_with_hash (m_entries_hash.get (), name, hash, NO_INSERT) |
19a2740f AB |
1604 | != NULL) |
1605 | { | |
32580f6d | 1606 | htab_remove_elt_with_hash (m_entries_hash.get (), name, hash); |
19a2740f AB |
1607 | m_lowest_common_denominator_valid = false; |
1608 | } | |
1609 | } | |
1610 | ||
60a20c19 PA |
1611 | /* Helper for the make_completion_match_str overloads. Returns NULL |
1612 | as an indication that we want MATCH_NAME exactly. It is up to the | |
1613 | caller to xstrdup that string if desired. */ | |
1614 | ||
1615 | static char * | |
1616 | make_completion_match_str_1 (const char *match_name, | |
1617 | const char *text, const char *word) | |
1618 | { | |
1619 | char *newobj; | |
1620 | ||
1621 | if (word == text) | |
1622 | { | |
1623 | /* Return NULL as an indication that we want MATCH_NAME | |
1624 | exactly. */ | |
1625 | return NULL; | |
1626 | } | |
1627 | else if (word > text) | |
1628 | { | |
1629 | /* Return some portion of MATCH_NAME. */ | |
1630 | newobj = xstrdup (match_name + (word - text)); | |
1631 | } | |
1632 | else | |
1633 | { | |
1634 | /* Return some of WORD plus MATCH_NAME. */ | |
1635 | size_t len = strlen (match_name); | |
1636 | newobj = (char *) xmalloc (text - word + len + 1); | |
1637 | memcpy (newobj, word, text - word); | |
1638 | memcpy (newobj + (text - word), match_name, len + 1); | |
1639 | } | |
1640 | ||
1641 | return newobj; | |
1642 | } | |
1643 | ||
1644 | /* See completer.h. */ | |
1645 | ||
1646 | gdb::unique_xmalloc_ptr<char> | |
1647 | make_completion_match_str (const char *match_name, | |
1648 | const char *text, const char *word) | |
1649 | { | |
1650 | char *newobj = make_completion_match_str_1 (match_name, text, word); | |
1651 | if (newobj == NULL) | |
1652 | newobj = xstrdup (match_name); | |
1653 | return gdb::unique_xmalloc_ptr<char> (newobj); | |
1654 | } | |
1655 | ||
1656 | /* See completer.h. */ | |
1657 | ||
1658 | gdb::unique_xmalloc_ptr<char> | |
1659 | make_completion_match_str (gdb::unique_xmalloc_ptr<char> &&match_name, | |
1660 | const char *text, const char *word) | |
1661 | { | |
1662 | char *newobj = make_completion_match_str_1 (match_name.get (), text, word); | |
1663 | if (newobj == NULL) | |
1664 | return std::move (match_name); | |
1665 | return gdb::unique_xmalloc_ptr<char> (newobj); | |
1666 | } | |
1667 | ||
6e035501 JV |
1668 | /* See complete.h. */ |
1669 | ||
1670 | completion_result | |
1671 | complete (const char *line, char const **word, int *quote_char) | |
1672 | { | |
3b9ff5d9 AB |
1673 | completion_tracker tracker_handle_brkchars (false); |
1674 | completion_tracker tracker_handle_completions (false); | |
6e035501 JV |
1675 | completion_tracker *tracker; |
1676 | ||
0ef209f2 JV |
1677 | /* The WORD should be set to the end of word to complete. We initialize |
1678 | to the completion point which is assumed to be at the end of LINE. | |
1679 | This leaves WORD to be initialized to a sensible value in cases | |
1680 | completion_find_completion_word() fails i.e., throws an exception. | |
1681 | See bug 24587. */ | |
1682 | *word = line + strlen (line); | |
1683 | ||
6e035501 JV |
1684 | try |
1685 | { | |
1686 | *word = completion_find_completion_word (tracker_handle_brkchars, | |
1687 | line, quote_char); | |
1688 | ||
1689 | /* Completers that provide a custom word point in the | |
1690 | handle_brkchars phase also compute their completions then. | |
1691 | Completers that leave the completion word handling to readline | |
1692 | must be called twice. */ | |
1693 | if (tracker_handle_brkchars.use_custom_word_point ()) | |
1694 | tracker = &tracker_handle_brkchars; | |
1695 | else | |
1696 | { | |
1697 | complete_line (tracker_handle_completions, *word, line, strlen (line)); | |
1698 | tracker = &tracker_handle_completions; | |
1699 | } | |
1700 | } | |
1701 | catch (const gdb_exception &ex) | |
1702 | { | |
1703 | return {}; | |
1704 | } | |
1705 | ||
1706 | return tracker->build_completion_result (*word, *word - line, strlen (line)); | |
1707 | } | |
1708 | ||
1709 | ||
eb3ff9a5 PA |
1710 | /* Generate completions all at once. Does nothing if max_completions |
1711 | is 0. If max_completions is non-negative, this will collect at | |
1712 | most max_completions strings. | |
83d31a92 | 1713 | |
67c296a2 PM |
1714 | TEXT is the caller's idea of the "word" we are looking at. |
1715 | ||
aff410f1 MS |
1716 | LINE_BUFFER is available to be looked at; it contains the entire |
1717 | text of the line. | |
67c296a2 PM |
1718 | |
1719 | POINT is the offset in that line of the cursor. You | |
1720 | should pretend that the line ends at POINT. */ | |
14032a66 | 1721 | |
eb3ff9a5 PA |
1722 | void |
1723 | complete_line (completion_tracker &tracker, | |
1724 | const char *text, const char *line_buffer, int point) | |
14032a66 | 1725 | { |
ef0b411a | 1726 | if (max_completions == 0) |
eb3ff9a5 PA |
1727 | return; |
1728 | complete_line_internal (tracker, text, line_buffer, point, | |
1729 | handle_completions); | |
14032a66 TT |
1730 | } |
1731 | ||
1732 | /* Complete on command names. Used by "help". */ | |
6e1dbf8c | 1733 | |
eb3ff9a5 | 1734 | void |
aff410f1 | 1735 | command_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1736 | completion_tracker &tracker, |
6f937416 | 1737 | const char *text, const char *word) |
14032a66 | 1738 | { |
eb3ff9a5 PA |
1739 | complete_line_internal (tracker, word, text, |
1740 | strlen (text), handle_help); | |
67c296a2 PM |
1741 | } |
1742 | ||
6e1dbf8c PA |
1743 | /* The corresponding completer_handle_brkchars implementation. */ |
1744 | ||
1745 | static void | |
1746 | command_completer_handle_brkchars (struct cmd_list_element *ignore, | |
eb3ff9a5 | 1747 | completion_tracker &tracker, |
6e1dbf8c PA |
1748 | const char *text, const char *word) |
1749 | { | |
1750 | set_rl_completer_word_break_characters | |
1751 | (gdb_completer_command_word_break_characters); | |
1752 | } | |
1753 | ||
de0bea00 MF |
1754 | /* Complete on signals. */ |
1755 | ||
eb3ff9a5 | 1756 | void |
de0bea00 | 1757 | signal_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1758 | completion_tracker &tracker, |
6f937416 | 1759 | const char *text, const char *word) |
de0bea00 | 1760 | { |
de0bea00 | 1761 | size_t len = strlen (word); |
570dc176 | 1762 | int signum; |
de0bea00 MF |
1763 | const char *signame; |
1764 | ||
1765 | for (signum = GDB_SIGNAL_FIRST; signum != GDB_SIGNAL_LAST; ++signum) | |
1766 | { | |
1767 | /* Can't handle this, so skip it. */ | |
1768 | if (signum == GDB_SIGNAL_0) | |
1769 | continue; | |
1770 | ||
570dc176 | 1771 | signame = gdb_signal_to_name ((enum gdb_signal) signum); |
de0bea00 MF |
1772 | |
1773 | /* Ignore the unknown signal case. */ | |
1774 | if (!signame || strcmp (signame, "?") == 0) | |
1775 | continue; | |
1776 | ||
1777 | if (strncasecmp (signame, word, len) == 0) | |
b02f78f9 | 1778 | tracker.add_completion (make_unique_xstrdup (signame)); |
de0bea00 | 1779 | } |
de0bea00 MF |
1780 | } |
1781 | ||
51f0e40d AB |
1782 | /* Bit-flags for selecting what the register and/or register-group |
1783 | completer should complete on. */ | |
71c24708 | 1784 | |
8d297bbf | 1785 | enum reg_completer_target |
51f0e40d AB |
1786 | { |
1787 | complete_register_names = 0x1, | |
1788 | complete_reggroup_names = 0x2 | |
1789 | }; | |
8d297bbf | 1790 | DEF_ENUM_FLAGS_TYPE (enum reg_completer_target, reg_completer_targets); |
51f0e40d AB |
1791 | |
1792 | /* Complete register names and/or reggroup names based on the value passed | |
1793 | in TARGETS. At least one bit in TARGETS must be set. */ | |
1794 | ||
eb3ff9a5 PA |
1795 | static void |
1796 | reg_or_group_completer_1 (completion_tracker &tracker, | |
51f0e40d | 1797 | const char *text, const char *word, |
8d297bbf | 1798 | reg_completer_targets targets) |
71c24708 | 1799 | { |
71c24708 AA |
1800 | size_t len = strlen (word); |
1801 | struct gdbarch *gdbarch; | |
71c24708 | 1802 | const char *name; |
71c24708 | 1803 | |
51f0e40d AB |
1804 | gdb_assert ((targets & (complete_register_names |
1805 | | complete_reggroup_names)) != 0); | |
1806 | gdbarch = get_current_arch (); | |
71c24708 | 1807 | |
51f0e40d | 1808 | if ((targets & complete_register_names) != 0) |
71c24708 | 1809 | { |
51f0e40d AB |
1810 | int i; |
1811 | ||
1812 | for (i = 0; | |
1813 | (name = user_reg_map_regnum_to_name (gdbarch, i)) != NULL; | |
1814 | i++) | |
1815 | { | |
1816 | if (*name != '\0' && strncmp (word, name, len) == 0) | |
b02f78f9 | 1817 | tracker.add_completion (make_unique_xstrdup (name)); |
51f0e40d | 1818 | } |
71c24708 AA |
1819 | } |
1820 | ||
51f0e40d | 1821 | if ((targets & complete_reggroup_names) != 0) |
71c24708 | 1822 | { |
1bca9b1e | 1823 | for (const struct reggroup *group : gdbarch_reggroups (gdbarch)) |
51f0e40d | 1824 | { |
af7ce09b | 1825 | name = group->name (); |
51f0e40d | 1826 | if (strncmp (word, name, len) == 0) |
b02f78f9 | 1827 | tracker.add_completion (make_unique_xstrdup (name)); |
51f0e40d | 1828 | } |
71c24708 | 1829 | } |
71c24708 AA |
1830 | } |
1831 | ||
51f0e40d AB |
1832 | /* Perform completion on register and reggroup names. */ |
1833 | ||
eb3ff9a5 | 1834 | void |
51f0e40d | 1835 | reg_or_group_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1836 | completion_tracker &tracker, |
51f0e40d AB |
1837 | const char *text, const char *word) |
1838 | { | |
eb3ff9a5 PA |
1839 | reg_or_group_completer_1 (tracker, text, word, |
1840 | (complete_register_names | |
1841 | | complete_reggroup_names)); | |
51f0e40d AB |
1842 | } |
1843 | ||
1844 | /* Perform completion on reggroup names. */ | |
1845 | ||
eb3ff9a5 | 1846 | void |
51f0e40d | 1847 | reggroup_completer (struct cmd_list_element *ignore, |
eb3ff9a5 | 1848 | completion_tracker &tracker, |
51f0e40d AB |
1849 | const char *text, const char *word) |
1850 | { | |
eb3ff9a5 PA |
1851 | reg_or_group_completer_1 (tracker, text, word, |
1852 | complete_reggroup_names); | |
51f0e40d | 1853 | } |
71c24708 | 1854 | |
6e1dbf8c PA |
1855 | /* The default completer_handle_brkchars implementation. */ |
1856 | ||
1857 | static void | |
1858 | default_completer_handle_brkchars (struct cmd_list_element *ignore, | |
eb3ff9a5 | 1859 | completion_tracker &tracker, |
6e1dbf8c PA |
1860 | const char *text, const char *word) |
1861 | { | |
1862 | set_rl_completer_word_break_characters | |
53fc67f8 | 1863 | (current_language->word_break_characters ()); |
6e1dbf8c PA |
1864 | } |
1865 | ||
1866 | /* See definition in completer.h. */ | |
1867 | ||
1868 | completer_handle_brkchars_ftype * | |
1869 | completer_handle_brkchars_func_for_completer (completer_ftype *fn) | |
1870 | { | |
1871 | if (fn == filename_completer) | |
1872 | return filename_completer_handle_brkchars; | |
1873 | ||
c6756f62 PA |
1874 | if (fn == location_completer) |
1875 | return location_completer_handle_brkchars; | |
1876 | ||
6e1dbf8c PA |
1877 | if (fn == command_completer) |
1878 | return command_completer_handle_brkchars; | |
1879 | ||
1880 | return default_completer_handle_brkchars; | |
1881 | } | |
1882 | ||
c6756f62 PA |
1883 | /* Used as brkchars when we want to tell readline we have a custom |
1884 | word point. We do that by making our rl_completion_word_break_hook | |
1885 | set RL_POINT to the desired word point, and return the character at | |
1886 | the word break point as the break char. This is two bytes in order | |
1887 | to fit one break character plus the terminating null. */ | |
1888 | static char gdb_custom_word_point_brkchars[2]; | |
1889 | ||
1890 | /* Since rl_basic_quote_characters is not completer-specific, we save | |
1891 | its original value here, in order to be able to restore it in | |
1892 | gdb_rl_attempted_completion_function. */ | |
1893 | static const char *gdb_org_rl_basic_quote_characters = rl_basic_quote_characters; | |
1894 | ||
67c296a2 PM |
1895 | /* Get the list of chars that are considered as word breaks |
1896 | for the current command. */ | |
1897 | ||
eb3ff9a5 PA |
1898 | static char * |
1899 | gdb_completion_word_break_characters_throw () | |
67c296a2 | 1900 | { |
eb3ff9a5 PA |
1901 | /* New completion starting. Get rid of the previous tracker and |
1902 | start afresh. */ | |
1903 | delete current_completion.tracker; | |
3b9ff5d9 | 1904 | current_completion.tracker = new completion_tracker (true); |
eb3ff9a5 PA |
1905 | |
1906 | completion_tracker &tracker = *current_completion.tracker; | |
1907 | ||
1908 | complete_line_internal (tracker, NULL, rl_line_buffer, | |
1909 | rl_point, handle_brkchars); | |
c5504eaf | 1910 | |
c6756f62 PA |
1911 | if (tracker.use_custom_word_point ()) |
1912 | { | |
1913 | gdb_assert (tracker.custom_word_point () > 0); | |
1914 | rl_point = tracker.custom_word_point () - 1; | |
272d4594 PA |
1915 | |
1916 | gdb_assert (rl_point >= 0 && rl_point < strlen (rl_line_buffer)); | |
1917 | ||
c6756f62 PA |
1918 | gdb_custom_word_point_brkchars[0] = rl_line_buffer[rl_point]; |
1919 | rl_completer_word_break_characters = gdb_custom_word_point_brkchars; | |
1920 | rl_completer_quote_characters = NULL; | |
1921 | ||
1922 | /* Clear this too, so that if we're completing a quoted string, | |
1923 | readline doesn't consider the quote character a delimiter. | |
1924 | If we didn't do this, readline would auto-complete {b | |
1925 | 'fun<tab>} to {'b 'function()'}, i.e., add the terminating | |
1926 | \', but, it wouldn't append the separator space either, which | |
1927 | is not desirable. So instead we take care of appending the | |
1928 | quote character to the LCD ourselves, in | |
1929 | gdb_rl_attempted_completion_function. Since this global is | |
1930 | not just completer-specific, we'll restore it back to the | |
1931 | default in gdb_rl_attempted_completion_function. */ | |
1932 | rl_basic_quote_characters = NULL; | |
1933 | } | |
1934 | ||
1add37b5 | 1935 | return (char *) rl_completer_word_break_characters; |
14032a66 TT |
1936 | } |
1937 | ||
eb3ff9a5 PA |
1938 | char * |
1939 | gdb_completion_word_break_characters () | |
1940 | { | |
1941 | /* New completion starting. */ | |
1942 | current_completion.aborted = false; | |
83d31a92 | 1943 | |
a70b8144 | 1944 | try |
eb3ff9a5 PA |
1945 | { |
1946 | return gdb_completion_word_break_characters_throw (); | |
1947 | } | |
230d2906 | 1948 | catch (const gdb_exception &ex) |
eb3ff9a5 PA |
1949 | { |
1950 | /* Set this to that gdb_rl_attempted_completion_function knows | |
1951 | to abort early. */ | |
1952 | current_completion.aborted = true; | |
1953 | } | |
83d31a92 | 1954 | |
eb3ff9a5 PA |
1955 | return NULL; |
1956 | } | |
83d31a92 | 1957 | |
eb3ff9a5 | 1958 | /* See completer.h. */ |
83d31a92 | 1959 | |
6a2c1b87 PA |
1960 | const char * |
1961 | completion_find_completion_word (completion_tracker &tracker, const char *text, | |
1962 | int *quote_char) | |
1963 | { | |
1964 | size_t point = strlen (text); | |
1965 | ||
1966 | complete_line_internal (tracker, NULL, text, point, handle_brkchars); | |
1967 | ||
c6756f62 PA |
1968 | if (tracker.use_custom_word_point ()) |
1969 | { | |
1970 | gdb_assert (tracker.custom_word_point () > 0); | |
1971 | *quote_char = tracker.quote_char (); | |
1972 | return text + tracker.custom_word_point (); | |
1973 | } | |
1974 | ||
6a2c1b87 PA |
1975 | gdb_rl_completion_word_info info; |
1976 | ||
1977 | info.word_break_characters = rl_completer_word_break_characters; | |
4f440ff3 | 1978 | info.quote_characters = rl_completer_quote_characters; |
6a2c1b87 PA |
1979 | info.basic_quote_characters = rl_basic_quote_characters; |
1980 | ||
1981 | return gdb_rl_find_completion_word (&info, quote_char, NULL, text); | |
1982 | } | |
1983 | ||
1984 | /* See completer.h. */ | |
1985 | ||
eb3ff9a5 | 1986 | void |
724fd9ba | 1987 | completion_tracker::recompute_lcd_visitor (completion_hash_entry *entry) |
83d31a92 | 1988 | { |
724fd9ba | 1989 | if (!m_lowest_common_denominator_valid) |
eb3ff9a5 | 1990 | { |
724fd9ba AB |
1991 | /* This is the first lowest common denominator that we are |
1992 | considering, just copy it in. */ | |
1993 | strcpy (m_lowest_common_denominator, entry->get_lcd ()); | |
eb3ff9a5 | 1994 | m_lowest_common_denominator_unique = true; |
724fd9ba | 1995 | m_lowest_common_denominator_valid = true; |
eb3ff9a5 PA |
1996 | } |
1997 | else | |
83d31a92 | 1998 | { |
724fd9ba AB |
1999 | /* Find the common denominator between the currently-known lowest |
2000 | common denominator and NEW_MATCH_UP. That becomes the new lowest | |
2001 | common denominator. */ | |
eb3ff9a5 | 2002 | size_t i; |
724fd9ba | 2003 | const char *new_match = entry->get_lcd (); |
83d31a92 | 2004 | |
eb3ff9a5 PA |
2005 | for (i = 0; |
2006 | (new_match[i] != '\0' | |
2007 | && new_match[i] == m_lowest_common_denominator[i]); | |
2008 | i++) | |
2009 | ; | |
2010 | if (m_lowest_common_denominator[i] != new_match[i]) | |
83d31a92 | 2011 | { |
eb3ff9a5 PA |
2012 | m_lowest_common_denominator[i] = '\0'; |
2013 | m_lowest_common_denominator_unique = false; | |
c5f0f3d0 FN |
2014 | } |
2015 | } | |
eb3ff9a5 PA |
2016 | } |
2017 | ||
c6756f62 PA |
2018 | /* See completer.h. */ |
2019 | ||
724fd9ba AB |
2020 | void |
2021 | completion_tracker::recompute_lowest_common_denominator () | |
2022 | { | |
2023 | /* We've already done this. */ | |
2024 | if (m_lowest_common_denominator_valid) | |
2025 | return; | |
2026 | ||
2027 | /* Resize the storage to ensure we have enough space, the plus one gives | |
2028 | us space for the trailing null terminator we will include. */ | |
2029 | m_lowest_common_denominator | |
2030 | = (char *) xrealloc (m_lowest_common_denominator, | |
2031 | m_lowest_common_denominator_max_length + 1); | |
2032 | ||
2033 | /* Callback used to visit each entry in the m_entries_hash. */ | |
2034 | auto visitor_func | |
2035 | = [] (void **slot, void *info) -> int | |
2036 | { | |
2037 | completion_tracker *obj = (completion_tracker *) info; | |
2038 | completion_hash_entry *entry = (completion_hash_entry *) *slot; | |
2039 | obj->recompute_lcd_visitor (entry); | |
2040 | return 1; | |
2041 | }; | |
2042 | ||
32580f6d | 2043 | htab_traverse (m_entries_hash.get (), visitor_func, this); |
724fd9ba AB |
2044 | m_lowest_common_denominator_valid = true; |
2045 | } | |
2046 | ||
2047 | /* See completer.h. */ | |
2048 | ||
c6756f62 | 2049 | void |
3844e605 | 2050 | completion_tracker::advance_custom_word_point_by (int len) |
c6756f62 PA |
2051 | { |
2052 | m_custom_word_point += len; | |
2053 | } | |
2054 | ||
eb3ff9a5 PA |
2055 | /* Build a new C string that is a copy of LCD with the whitespace of |
2056 | ORIG/ORIG_LEN preserved. | |
2057 | ||
2058 | Say the user is completing a symbol name, with spaces, like: | |
2059 | ||
2060 | "foo ( i" | |
2061 | ||
2062 | and the resulting completion match is: | |
2063 | ||
2064 | "foo(int)" | |
2065 | ||
2066 | we want to end up with an input line like: | |
2067 | ||
2068 | "foo ( int)" | |
2069 | ^^^^^^^ => text from LCD [1], whitespace from ORIG preserved. | |
2070 | ^^ => new text from LCD | |
2071 | ||
2072 | [1] - We must take characters from the LCD instead of the original | |
2073 | text, since some completions want to change upper/lowercase. E.g.: | |
c5f0f3d0 | 2074 | |
eb3ff9a5 | 2075 | "handle sig<>" |
c5f0f3d0 | 2076 | |
eb3ff9a5 PA |
2077 | completes to: |
2078 | ||
2079 | "handle SIG[QUIT|etc.]" | |
2080 | */ | |
2081 | ||
2082 | static char * | |
2083 | expand_preserving_ws (const char *orig, size_t orig_len, | |
2084 | const char *lcd) | |
2085 | { | |
2086 | const char *p_orig = orig; | |
2087 | const char *orig_end = orig + orig_len; | |
2088 | const char *p_lcd = lcd; | |
2089 | std::string res; | |
2090 | ||
2091 | while (p_orig < orig_end) | |
c5f0f3d0 | 2092 | { |
eb3ff9a5 PA |
2093 | if (*p_orig == ' ') |
2094 | { | |
2095 | while (p_orig < orig_end && *p_orig == ' ') | |
2096 | res += *p_orig++; | |
f1735a53 | 2097 | p_lcd = skip_spaces (p_lcd); |
eb3ff9a5 PA |
2098 | } |
2099 | else | |
c5f0f3d0 | 2100 | { |
eb3ff9a5 PA |
2101 | /* Take characters from the LCD instead of the original |
2102 | text, since some completions change upper/lowercase. | |
2103 | E.g.: | |
2104 | "handle sig<>" | |
2105 | completes to: | |
2106 | "handle SIG[QUIT|etc.]" | |
2107 | */ | |
2108 | res += *p_lcd; | |
2109 | p_orig++; | |
2110 | p_lcd++; | |
c5f0f3d0 FN |
2111 | } |
2112 | } | |
2113 | ||
eb3ff9a5 PA |
2114 | while (*p_lcd != '\0') |
2115 | res += *p_lcd++; | |
2116 | ||
2117 | return xstrdup (res.c_str ()); | |
2118 | } | |
2119 | ||
2120 | /* See completer.h. */ | |
2121 | ||
2122 | completion_result | |
2123 | completion_tracker::build_completion_result (const char *text, | |
2124 | int start, int end) | |
2125 | { | |
32580f6d | 2126 | size_t element_count = htab_elements (m_entries_hash.get ()); |
eb3ff9a5 | 2127 | |
724fd9ba | 2128 | if (element_count == 0) |
eb3ff9a5 PA |
2129 | return {}; |
2130 | ||
2131 | /* +1 for the LCD, and +1 for NULL termination. */ | |
724fd9ba | 2132 | char **match_list = XNEWVEC (char *, 1 + element_count + 1); |
eb3ff9a5 PA |
2133 | |
2134 | /* Build replacement word, based on the LCD. */ | |
2135 | ||
724fd9ba | 2136 | recompute_lowest_common_denominator (); |
eb3ff9a5 PA |
2137 | match_list[0] |
2138 | = expand_preserving_ws (text, end - start, | |
2139 | m_lowest_common_denominator); | |
2140 | ||
2141 | if (m_lowest_common_denominator_unique) | |
2142 | { | |
c6756f62 PA |
2143 | /* We don't rely on readline appending the quote char as |
2144 | delimiter as then readline wouldn't append the ' ' after the | |
2145 | completion. */ | |
896a7aa6 | 2146 | char buf[2] = { (char) quote_char () }; |
c6756f62 PA |
2147 | |
2148 | match_list[0] = reconcat (match_list[0], match_list[0], | |
2149 | buf, (char *) NULL); | |
eb3ff9a5 PA |
2150 | match_list[1] = NULL; |
2151 | ||
c45ec17c PA |
2152 | /* If the tracker wants to, or we already have a space at the |
2153 | end of the match, tell readline to skip appending | |
2154 | another. */ | |
aafdfb4e | 2155 | char *match = match_list[0]; |
eb3ff9a5 | 2156 | bool completion_suppress_append |
c45ec17c | 2157 | = (suppress_append_ws () |
aafdfb4e TV |
2158 | || (match[0] != '\0' |
2159 | && match[strlen (match) - 1] == ' ')); | |
eb3ff9a5 PA |
2160 | |
2161 | return completion_result (match_list, 1, completion_suppress_append); | |
2162 | } | |
2163 | else | |
2164 | { | |
724fd9ba AB |
2165 | /* State object used while building the completion list. */ |
2166 | struct list_builder | |
2167 | { | |
2168 | list_builder (char **ml) | |
2169 | : match_list (ml), | |
2170 | index (1) | |
2171 | { /* Nothing. */ } | |
2172 | ||
2173 | /* The list we are filling. */ | |
2174 | char **match_list; | |
2175 | ||
2176 | /* The next index in the list to write to. */ | |
2177 | int index; | |
2178 | }; | |
2179 | list_builder builder (match_list); | |
2180 | ||
2181 | /* Visit each entry in m_entries_hash and add it to the completion | |
2182 | list, updating the builder state object. */ | |
2183 | auto func | |
2184 | = [] (void **slot, void *info) -> int | |
2185 | { | |
2186 | completion_hash_entry *entry = (completion_hash_entry *) *slot; | |
2187 | list_builder *state = (list_builder *) info; | |
2188 | ||
2189 | state->match_list[state->index] = entry->release_name (); | |
2190 | state->index++; | |
2191 | return 1; | |
2192 | }; | |
2193 | ||
2194 | /* Build the completion list and add a null at the end. */ | |
32580f6d | 2195 | htab_traverse_noresize (m_entries_hash.get (), func, &builder); |
724fd9ba AB |
2196 | match_list[builder.index] = NULL; |
2197 | ||
2198 | return completion_result (match_list, builder.index - 1, false); | |
eb3ff9a5 PA |
2199 | } |
2200 | } | |
2201 | ||
2202 | /* See completer.h */ | |
2203 | ||
2204 | completion_result::completion_result () | |
2205 | : match_list (NULL), number_matches (0), | |
2206 | completion_suppress_append (false) | |
2207 | {} | |
2208 | ||
2209 | /* See completer.h */ | |
2210 | ||
2211 | completion_result::completion_result (char **match_list_, | |
2212 | size_t number_matches_, | |
2213 | bool completion_suppress_append_) | |
2214 | : match_list (match_list_), | |
2215 | number_matches (number_matches_), | |
2216 | completion_suppress_append (completion_suppress_append_) | |
2217 | {} | |
2218 | ||
2219 | /* See completer.h */ | |
2220 | ||
2221 | completion_result::~completion_result () | |
2222 | { | |
2223 | reset_match_list (); | |
2224 | } | |
2225 | ||
2226 | /* See completer.h */ | |
2227 | ||
0fa7617d TT |
2228 | completion_result::completion_result (completion_result &&rhs) noexcept |
2229 | : match_list (rhs.match_list), | |
2230 | number_matches (rhs.number_matches) | |
eb3ff9a5 | 2231 | { |
eb3ff9a5 | 2232 | rhs.match_list = NULL; |
eb3ff9a5 PA |
2233 | rhs.number_matches = 0; |
2234 | } | |
2235 | ||
2236 | /* See completer.h */ | |
2237 | ||
2238 | char ** | |
2239 | completion_result::release_match_list () | |
2240 | { | |
2241 | char **ret = match_list; | |
2242 | match_list = NULL; | |
2243 | return ret; | |
2244 | } | |
2245 | ||
eb3ff9a5 PA |
2246 | /* See completer.h */ |
2247 | ||
2248 | void | |
2249 | completion_result::sort_match_list () | |
2250 | { | |
2251 | if (number_matches > 1) | |
2252 | { | |
2253 | /* Element 0 is special (it's the common prefix), leave it | |
2254 | be. */ | |
2255 | std::sort (&match_list[1], | |
2256 | &match_list[number_matches + 1], | |
2257 | compare_cstrings); | |
2258 | } | |
2259 | } | |
2260 | ||
2261 | /* See completer.h */ | |
2262 | ||
2263 | void | |
2264 | completion_result::reset_match_list () | |
2265 | { | |
2266 | if (match_list != NULL) | |
2267 | { | |
2268 | for (char **p = match_list; *p != NULL; p++) | |
2269 | xfree (*p); | |
2270 | xfree (match_list); | |
2271 | match_list = NULL; | |
2272 | } | |
2273 | } | |
2274 | ||
2275 | /* Helper for gdb_rl_attempted_completion_function, which does most of | |
2276 | the work. This is called by readline to build the match list array | |
2277 | and to determine the lowest common denominator. The real matches | |
2278 | list starts at match[1], while match[0] is the slot holding | |
2279 | readline's idea of the lowest common denominator of all matches, | |
2280 | which is what readline replaces the completion "word" with. | |
2281 | ||
2282 | TEXT is the caller's idea of the "word" we are looking at, as | |
2283 | computed in the handle_brkchars phase. | |
2284 | ||
2285 | START is the offset from RL_LINE_BUFFER where TEXT starts. END is | |
2286 | the offset from RL_LINE_BUFFER where TEXT ends (i.e., where | |
2287 | rl_point is). | |
2288 | ||
2289 | You should thus pretend that the line ends at END (relative to | |
2290 | RL_LINE_BUFFER). | |
2291 | ||
2292 | RL_LINE_BUFFER contains the entire text of the line. RL_POINT is | |
2293 | the offset in that line of the cursor. You should pretend that the | |
2294 | line ends at POINT. | |
2295 | ||
2296 | Returns NULL if there are no completions. */ | |
2297 | ||
2298 | static char ** | |
2299 | gdb_rl_attempted_completion_function_throw (const char *text, int start, int end) | |
2300 | { | |
c6756f62 PA |
2301 | /* Completers that provide a custom word point in the |
2302 | handle_brkchars phase also compute their completions then. | |
2303 | Completers that leave the completion word handling to readline | |
2304 | must be called twice. If rl_point (i.e., END) is at column 0, | |
2305 | then readline skips the handle_brkchars phase, and so we create a | |
2306 | tracker now in that case too. */ | |
2307 | if (end == 0 || !current_completion.tracker->use_custom_word_point ()) | |
2308 | { | |
2309 | delete current_completion.tracker; | |
3b9ff5d9 | 2310 | current_completion.tracker = new completion_tracker (true); |
eb3ff9a5 | 2311 | |
c6756f62 PA |
2312 | complete_line (*current_completion.tracker, text, |
2313 | rl_line_buffer, rl_point); | |
2314 | } | |
c5f0f3d0 | 2315 | |
eb3ff9a5 PA |
2316 | completion_tracker &tracker = *current_completion.tracker; |
2317 | ||
2318 | completion_result result | |
2319 | = tracker.build_completion_result (text, start, end); | |
2320 | ||
2321 | rl_completion_suppress_append = result.completion_suppress_append; | |
2322 | return result.release_match_list (); | |
2323 | } | |
2324 | ||
2325 | /* Function installed as "rl_attempted_completion_function" readline | |
2326 | hook. Wrapper around gdb_rl_attempted_completion_function_throw | |
2327 | that catches C++ exceptions, which can't cross readline. */ | |
2328 | ||
2329 | char ** | |
2330 | gdb_rl_attempted_completion_function (const char *text, int start, int end) | |
2331 | { | |
c6756f62 PA |
2332 | /* Restore globals that might have been tweaked in |
2333 | gdb_completion_word_break_characters. */ | |
2334 | rl_basic_quote_characters = gdb_org_rl_basic_quote_characters; | |
2335 | ||
eb3ff9a5 PA |
2336 | /* If we end up returning NULL, either on error, or simple because |
2337 | there are no matches, inhibit readline's default filename | |
2338 | completer. */ | |
2339 | rl_attempted_completion_over = 1; | |
2340 | ||
2341 | /* If the handle_brkchars phase was aborted, don't try | |
2342 | completing. */ | |
2343 | if (current_completion.aborted) | |
2344 | return NULL; | |
2345 | ||
a70b8144 | 2346 | try |
eb3ff9a5 PA |
2347 | { |
2348 | return gdb_rl_attempted_completion_function_throw (text, start, end); | |
2349 | } | |
230d2906 | 2350 | catch (const gdb_exception &ex) |
eb3ff9a5 PA |
2351 | { |
2352 | } | |
eb3ff9a5 PA |
2353 | |
2354 | return NULL; | |
c5f0f3d0 | 2355 | } |
4e87b832 | 2356 | |
ef0b411a GB |
2357 | /* Return a message indicating that the maximum number of completions |
2358 | has been reached and that there may be more. */ | |
2359 | ||
2360 | const char * | |
2361 | get_max_completions_reached_message (void) | |
2362 | { | |
2363 | return _("*** List may be truncated, max-completions reached. ***"); | |
2364 | } | |
82083d6d DE |
2365 | \f |
2366 | /* GDB replacement for rl_display_match_list. | |
2367 | Readline doesn't provide a clean interface for TUI(curses). | |
2368 | A hack previously used was to send readline's rl_outstream through a pipe | |
2369 | and read it from the event loop. Bleah. IWBN if readline abstracted | |
2370 | away all the necessary bits, and this is what this code does. It | |
2371 | replicates the parts of readline we need and then adds an abstraction | |
2372 | layer, currently implemented as struct match_list_displayer, so that both | |
2373 | CLI and TUI can use it. We copy all this readline code to minimize | |
2374 | GDB-specific mods to readline. Once this code performs as desired then | |
2375 | we can submit it to the readline maintainers. | |
2376 | ||
2377 | N.B. A lot of the code is the way it is in order to minimize differences | |
2378 | from readline's copy. */ | |
2379 | ||
2380 | /* Not supported here. */ | |
2381 | #undef VISIBLE_STATS | |
2382 | ||
2383 | #if defined (HANDLE_MULTIBYTE) | |
2384 | #define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2) | |
2385 | #define MB_NULLWCH(x) ((x) == 0) | |
2386 | #endif | |
2387 | ||
2388 | #define ELLIPSIS_LEN 3 | |
2389 | ||
2390 | /* gdb version of readline/complete.c:get_y_or_n. | |
2391 | 'y' -> returns 1, and 'n' -> returns 0. | |
2392 | Also supported: space == 'y', RUBOUT == 'n', ctrl-g == start over. | |
2393 | If FOR_PAGER is non-zero, then also supported are: | |
2394 | NEWLINE or RETURN -> returns 2, and 'q' -> returns 0. */ | |
2395 | ||
2396 | static int | |
2397 | gdb_get_y_or_n (int for_pager, const struct match_list_displayer *displayer) | |
2398 | { | |
2399 | int c; | |
2400 | ||
2401 | for (;;) | |
2402 | { | |
2403 | RL_SETSTATE (RL_STATE_MOREINPUT); | |
2404 | c = displayer->read_key (displayer); | |
2405 | RL_UNSETSTATE (RL_STATE_MOREINPUT); | |
2406 | ||
2407 | if (c == 'y' || c == 'Y' || c == ' ') | |
2408 | return 1; | |
2409 | if (c == 'n' || c == 'N' || c == RUBOUT) | |
2410 | return 0; | |
2411 | if (c == ABORT_CHAR || c < 0) | |
2412 | { | |
2413 | /* Readline doesn't erase_entire_line here, but without it the | |
2414 | --More-- prompt isn't erased and neither is the text entered | |
2415 | thus far redisplayed. */ | |
2416 | displayer->erase_entire_line (displayer); | |
2417 | /* Note: The arguments to rl_abort are ignored. */ | |
2418 | rl_abort (0, 0); | |
2419 | } | |
2420 | if (for_pager && (c == NEWLINE || c == RETURN)) | |
2421 | return 2; | |
2422 | if (for_pager && (c == 'q' || c == 'Q')) | |
2423 | return 0; | |
2424 | displayer->beep (displayer); | |
2425 | } | |
2426 | } | |
2427 | ||
2428 | /* Pager function for tab-completion. | |
2429 | This is based on readline/complete.c:_rl_internal_pager. | |
2430 | LINES is the number of lines of output displayed thus far. | |
2431 | Returns: | |
2432 | -1 -> user pressed 'n' or equivalent, | |
2433 | 0 -> user pressed 'y' or equivalent, | |
2434 | N -> user pressed NEWLINE or equivalent and N is LINES - 1. */ | |
2435 | ||
2436 | static int | |
2437 | gdb_display_match_list_pager (int lines, | |
2438 | const struct match_list_displayer *displayer) | |
2439 | { | |
2440 | int i; | |
2441 | ||
2442 | displayer->puts (displayer, "--More--"); | |
2443 | displayer->flush (displayer); | |
2444 | i = gdb_get_y_or_n (1, displayer); | |
2445 | displayer->erase_entire_line (displayer); | |
2446 | if (i == 0) | |
2447 | return -1; | |
2448 | else if (i == 2) | |
2449 | return (lines - 1); | |
2450 | else | |
2451 | return 0; | |
2452 | } | |
2453 | ||
2454 | /* Return non-zero if FILENAME is a directory. | |
2455 | Based on readline/complete.c:path_isdir. */ | |
2456 | ||
2457 | static int | |
2458 | gdb_path_isdir (const char *filename) | |
2459 | { | |
2460 | struct stat finfo; | |
2461 | ||
2462 | return (stat (filename, &finfo) == 0 && S_ISDIR (finfo.st_mode)); | |
2463 | } | |
2464 | ||
2465 | /* Return the portion of PATHNAME that should be output when listing | |
2466 | possible completions. If we are hacking filename completion, we | |
2467 | are only interested in the basename, the portion following the | |
2468 | final slash. Otherwise, we return what we were passed. Since | |
2469 | printing empty strings is not very informative, if we're doing | |
2470 | filename completion, and the basename is the empty string, we look | |
2471 | for the previous slash and return the portion following that. If | |
2472 | there's no previous slash, we just return what we were passed. | |
2473 | ||
2474 | Based on readline/complete.c:printable_part. */ | |
2475 | ||
2476 | static char * | |
2477 | gdb_printable_part (char *pathname) | |
2478 | { | |
2479 | char *temp, *x; | |
2480 | ||
2481 | if (rl_filename_completion_desired == 0) /* don't need to do anything */ | |
2482 | return (pathname); | |
2483 | ||
2484 | temp = strrchr (pathname, '/'); | |
5836a818 | 2485 | #if defined (__MSDOS__) |
82083d6d DE |
2486 | if (temp == 0 && ISALPHA ((unsigned char)pathname[0]) && pathname[1] == ':') |
2487 | temp = pathname + 1; | |
2488 | #endif | |
2489 | ||
2490 | if (temp == 0 || *temp == '\0') | |
2491 | return (pathname); | |
2492 | /* If the basename is NULL, we might have a pathname like '/usr/src/'. | |
2493 | Look for a previous slash and, if one is found, return the portion | |
2494 | following that slash. If there's no previous slash, just return the | |
2495 | pathname we were passed. */ | |
2496 | else if (temp[1] == '\0') | |
2497 | { | |
2498 | for (x = temp - 1; x > pathname; x--) | |
dda83cd7 SM |
2499 | if (*x == '/') |
2500 | break; | |
82083d6d DE |
2501 | return ((*x == '/') ? x + 1 : pathname); |
2502 | } | |
2503 | else | |
2504 | return ++temp; | |
2505 | } | |
2506 | ||
2507 | /* Compute width of STRING when displayed on screen by print_filename. | |
2508 | Based on readline/complete.c:fnwidth. */ | |
2509 | ||
2510 | static int | |
2511 | gdb_fnwidth (const char *string) | |
2512 | { | |
2513 | int width, pos; | |
2514 | #if defined (HANDLE_MULTIBYTE) | |
2515 | mbstate_t ps; | |
2516 | int left, w; | |
2517 | size_t clen; | |
2518 | wchar_t wc; | |
2519 | ||
2520 | left = strlen (string) + 1; | |
2521 | memset (&ps, 0, sizeof (mbstate_t)); | |
2522 | #endif | |
2523 | ||
2524 | width = pos = 0; | |
2525 | while (string[pos]) | |
2526 | { | |
2527 | if (CTRL_CHAR (string[pos]) || string[pos] == RUBOUT) | |
2528 | { | |
2529 | width += 2; | |
2530 | pos++; | |
2531 | } | |
2532 | else | |
2533 | { | |
2534 | #if defined (HANDLE_MULTIBYTE) | |
2535 | clen = mbrtowc (&wc, string + pos, left - pos, &ps); | |
2536 | if (MB_INVALIDCH (clen)) | |
2537 | { | |
2538 | width++; | |
2539 | pos++; | |
2540 | memset (&ps, 0, sizeof (mbstate_t)); | |
2541 | } | |
2542 | else if (MB_NULLWCH (clen)) | |
2543 | break; | |
2544 | else | |
2545 | { | |
2546 | pos += clen; | |
2547 | w = wcwidth (wc); | |
2548 | width += (w >= 0) ? w : 1; | |
2549 | } | |
2550 | #else | |
2551 | width++; | |
2552 | pos++; | |
2553 | #endif | |
2554 | } | |
2555 | } | |
2556 | ||
2557 | return width; | |
2558 | } | |
2559 | ||
2560 | /* Print TO_PRINT, one matching completion. | |
2561 | PREFIX_BYTES is number of common prefix bytes. | |
2562 | Based on readline/complete.c:fnprint. */ | |
2563 | ||
2564 | static int | |
2565 | gdb_fnprint (const char *to_print, int prefix_bytes, | |
2566 | const struct match_list_displayer *displayer) | |
2567 | { | |
0a4f5f8c | 2568 | int printed_len, w; |
82083d6d DE |
2569 | const char *s; |
2570 | #if defined (HANDLE_MULTIBYTE) | |
2571 | mbstate_t ps; | |
2572 | const char *end; | |
2573 | size_t tlen; | |
2574 | int width; | |
2575 | wchar_t wc; | |
2576 | ||
2577 | end = to_print + strlen (to_print) + 1; | |
2578 | memset (&ps, 0, sizeof (mbstate_t)); | |
2579 | #endif | |
2580 | ||
0a4f5f8c | 2581 | printed_len = 0; |
82083d6d DE |
2582 | |
2583 | /* Don't print only the ellipsis if the common prefix is one of the | |
2584 | possible completions */ | |
2585 | if (to_print[prefix_bytes] == '\0') | |
2586 | prefix_bytes = 0; | |
2587 | ||
0a4f5f8c | 2588 | if (prefix_bytes) |
82083d6d DE |
2589 | { |
2590 | char ellipsis; | |
2591 | ||
2592 | ellipsis = (to_print[prefix_bytes] == '.') ? '_' : '.'; | |
2593 | for (w = 0; w < ELLIPSIS_LEN; w++) | |
2594 | displayer->putch (displayer, ellipsis); | |
2595 | printed_len = ELLIPSIS_LEN; | |
2596 | } | |
2597 | ||
2598 | s = to_print + prefix_bytes; | |
2599 | while (*s) | |
2600 | { | |
2601 | if (CTRL_CHAR (*s)) | |
dda83cd7 SM |
2602 | { |
2603 | displayer->putch (displayer, '^'); | |
2604 | displayer->putch (displayer, UNCTRL (*s)); | |
2605 | printed_len += 2; | |
2606 | s++; | |
82083d6d DE |
2607 | #if defined (HANDLE_MULTIBYTE) |
2608 | memset (&ps, 0, sizeof (mbstate_t)); | |
2609 | #endif | |
dda83cd7 | 2610 | } |
82083d6d DE |
2611 | else if (*s == RUBOUT) |
2612 | { | |
2613 | displayer->putch (displayer, '^'); | |
2614 | displayer->putch (displayer, '?'); | |
2615 | printed_len += 2; | |
2616 | s++; | |
2617 | #if defined (HANDLE_MULTIBYTE) | |
2618 | memset (&ps, 0, sizeof (mbstate_t)); | |
2619 | #endif | |
2620 | } | |
2621 | else | |
2622 | { | |
2623 | #if defined (HANDLE_MULTIBYTE) | |
2624 | tlen = mbrtowc (&wc, s, end - s, &ps); | |
2625 | if (MB_INVALIDCH (tlen)) | |
2626 | { | |
2627 | tlen = 1; | |
2628 | width = 1; | |
2629 | memset (&ps, 0, sizeof (mbstate_t)); | |
2630 | } | |
2631 | else if (MB_NULLWCH (tlen)) | |
2632 | break; | |
2633 | else | |
2634 | { | |
2635 | w = wcwidth (wc); | |
2636 | width = (w >= 0) ? w : 1; | |
2637 | } | |
2638 | for (w = 0; w < tlen; ++w) | |
2639 | displayer->putch (displayer, s[w]); | |
2640 | s += tlen; | |
2641 | printed_len += width; | |
2642 | #else | |
2643 | displayer->putch (displayer, *s); | |
2644 | s++; | |
2645 | printed_len++; | |
2646 | #endif | |
2647 | } | |
2648 | } | |
2649 | ||
2650 | return printed_len; | |
2651 | } | |
2652 | ||
2653 | /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we | |
2654 | are using it, check for and output a single character for `special' | |
2655 | filenames. Return the number of characters we output. | |
2656 | Based on readline/complete.c:print_filename. */ | |
2657 | ||
2658 | static int | |
2659 | gdb_print_filename (char *to_print, char *full_pathname, int prefix_bytes, | |
2660 | const struct match_list_displayer *displayer) | |
2661 | { | |
2662 | int printed_len, extension_char, slen, tlen; | |
a121b7c1 PA |
2663 | char *s, c, *new_full_pathname; |
2664 | const char *dn; | |
82083d6d DE |
2665 | extern int _rl_complete_mark_directories; |
2666 | ||
2667 | extension_char = 0; | |
2668 | printed_len = gdb_fnprint (to_print, prefix_bytes, displayer); | |
2669 | ||
2670 | #if defined (VISIBLE_STATS) | |
2671 | if (rl_filename_completion_desired && (rl_visible_stats || _rl_complete_mark_directories)) | |
2672 | #else | |
2673 | if (rl_filename_completion_desired && _rl_complete_mark_directories) | |
2674 | #endif | |
2675 | { | |
2676 | /* If to_print != full_pathname, to_print is the basename of the | |
2677 | path passed. In this case, we try to expand the directory | |
2678 | name before checking for the stat character. */ | |
2679 | if (to_print != full_pathname) | |
2680 | { | |
2681 | /* Terminate the directory name. */ | |
2682 | c = to_print[-1]; | |
2683 | to_print[-1] = '\0'; | |
2684 | ||
2685 | /* If setting the last slash in full_pathname to a NUL results in | |
2686 | full_pathname being the empty string, we are trying to complete | |
2687 | files in the root directory. If we pass a null string to the | |
2688 | bash directory completion hook, for example, it will expand it | |
2689 | to the current directory. We just want the `/'. */ | |
2690 | if (full_pathname == 0 || *full_pathname == 0) | |
2691 | dn = "/"; | |
2692 | else if (full_pathname[0] != '/') | |
2693 | dn = full_pathname; | |
2694 | else if (full_pathname[1] == 0) | |
2695 | dn = "//"; /* restore trailing slash to `//' */ | |
2696 | else if (full_pathname[1] == '/' && full_pathname[2] == 0) | |
2697 | dn = "/"; /* don't turn /// into // */ | |
2698 | else | |
2699 | dn = full_pathname; | |
2700 | s = tilde_expand (dn); | |
2701 | if (rl_directory_completion_hook) | |
2702 | (*rl_directory_completion_hook) (&s); | |
2703 | ||
2704 | slen = strlen (s); | |
2705 | tlen = strlen (to_print); | |
2706 | new_full_pathname = (char *)xmalloc (slen + tlen + 2); | |
2707 | strcpy (new_full_pathname, s); | |
2708 | if (s[slen - 1] == '/') | |
2709 | slen--; | |
2710 | else | |
2711 | new_full_pathname[slen] = '/'; | |
2712 | new_full_pathname[slen] = '/'; | |
2713 | strcpy (new_full_pathname + slen + 1, to_print); | |
2714 | ||
2715 | #if defined (VISIBLE_STATS) | |
2716 | if (rl_visible_stats) | |
2717 | extension_char = stat_char (new_full_pathname); | |
2718 | else | |
2719 | #endif | |
2720 | if (gdb_path_isdir (new_full_pathname)) | |
2721 | extension_char = '/'; | |
2722 | ||
2723 | xfree (new_full_pathname); | |
2724 | to_print[-1] = c; | |
2725 | } | |
2726 | else | |
2727 | { | |
2728 | s = tilde_expand (full_pathname); | |
2729 | #if defined (VISIBLE_STATS) | |
2730 | if (rl_visible_stats) | |
2731 | extension_char = stat_char (s); | |
2732 | else | |
2733 | #endif | |
2734 | if (gdb_path_isdir (s)) | |
2735 | extension_char = '/'; | |
2736 | } | |
2737 | ||
2738 | xfree (s); | |
2739 | if (extension_char) | |
2740 | { | |
2741 | displayer->putch (displayer, extension_char); | |
2742 | printed_len++; | |
2743 | } | |
2744 | } | |
2745 | ||
2746 | return printed_len; | |
2747 | } | |
2748 | ||
2749 | /* GDB version of readline/complete.c:complete_get_screenwidth. */ | |
2750 | ||
2751 | static int | |
2752 | gdb_complete_get_screenwidth (const struct match_list_displayer *displayer) | |
2753 | { | |
2754 | /* Readline has other stuff here which it's not clear we need. */ | |
2755 | return displayer->width; | |
2756 | } | |
2757 | ||
0a4f5f8c | 2758 | extern int _rl_completion_prefix_display_length; |
56000a98 PA |
2759 | extern int _rl_print_completions_horizontally; |
2760 | ||
cf0d07fd | 2761 | extern "C" int _rl_qsort_string_compare (const void *, const void *); |
56000a98 PA |
2762 | typedef int QSFUNC (const void *, const void *); |
2763 | ||
82083d6d | 2764 | /* GDB version of readline/complete.c:rl_display_match_list. |
ef0b411a GB |
2765 | See gdb_display_match_list for a description of MATCHES, LEN, MAX. |
2766 | Returns non-zero if all matches are displayed. */ | |
82083d6d | 2767 | |
ef0b411a | 2768 | static int |
82083d6d DE |
2769 | gdb_display_match_list_1 (char **matches, int len, int max, |
2770 | const struct match_list_displayer *displayer) | |
2771 | { | |
2772 | int count, limit, printed_len, lines, cols; | |
2773 | int i, j, k, l, common_length, sind; | |
2774 | char *temp, *t; | |
2775 | int page_completions = displayer->height != INT_MAX && pagination_enabled; | |
82083d6d DE |
2776 | |
2777 | /* Find the length of the prefix common to all items: length as displayed | |
2778 | characters (common_length) and as a byte index into the matches (sind) */ | |
2779 | common_length = sind = 0; | |
0a4f5f8c | 2780 | if (_rl_completion_prefix_display_length > 0) |
82083d6d DE |
2781 | { |
2782 | t = gdb_printable_part (matches[0]); | |
2783 | temp = strrchr (t, '/'); | |
2784 | common_length = temp ? gdb_fnwidth (temp) : gdb_fnwidth (t); | |
2785 | sind = temp ? strlen (temp) : strlen (t); | |
2786 | ||
0a4f5f8c | 2787 | if (common_length > _rl_completion_prefix_display_length && common_length > ELLIPSIS_LEN) |
82083d6d | 2788 | max -= common_length - ELLIPSIS_LEN; |
0a4f5f8c | 2789 | else |
82083d6d DE |
2790 | common_length = sind = 0; |
2791 | } | |
2792 | ||
2793 | /* How many items of MAX length can we fit in the screen window? */ | |
2794 | cols = gdb_complete_get_screenwidth (displayer); | |
2795 | max += 2; | |
2796 | limit = cols / max; | |
2797 | if (limit != 1 && (limit * max == cols)) | |
2798 | limit--; | |
2799 | ||
2800 | /* If cols == 0, limit will end up -1 */ | |
2801 | if (cols < displayer->width && limit < 0) | |
2802 | limit = 1; | |
2803 | ||
2804 | /* Avoid a possible floating exception. If max > cols, | |
2805 | limit will be 0 and a divide-by-zero fault will result. */ | |
2806 | if (limit == 0) | |
2807 | limit = 1; | |
2808 | ||
2809 | /* How many iterations of the printing loop? */ | |
2810 | count = (len + (limit - 1)) / limit; | |
2811 | ||
2812 | /* Watch out for special case. If LEN is less than LIMIT, then | |
2813 | just do the inner printing loop. | |
2814 | 0 < len <= limit implies count = 1. */ | |
2815 | ||
2816 | /* Sort the items if they are not already sorted. */ | |
2817 | if (rl_ignore_completion_duplicates == 0 && rl_sort_completion_matches) | |
2818 | qsort (matches + 1, len, sizeof (char *), (QSFUNC *)_rl_qsort_string_compare); | |
2819 | ||
2820 | displayer->crlf (displayer); | |
2821 | ||
2822 | lines = 0; | |
2823 | if (_rl_print_completions_horizontally == 0) | |
2824 | { | |
2825 | /* Print the sorted items, up-and-down alphabetically, like ls. */ | |
2826 | for (i = 1; i <= count; i++) | |
2827 | { | |
2828 | for (j = 0, l = i; j < limit; j++) | |
2829 | { | |
2830 | if (l > len || matches[l] == 0) | |
2831 | break; | |
2832 | else | |
2833 | { | |
2834 | temp = gdb_printable_part (matches[l]); | |
2835 | printed_len = gdb_print_filename (temp, matches[l], sind, | |
2836 | displayer); | |
2837 | ||
2838 | if (j + 1 < limit) | |
2839 | for (k = 0; k < max - printed_len; k++) | |
2840 | displayer->putch (displayer, ' '); | |
2841 | } | |
2842 | l += count; | |
2843 | } | |
2844 | displayer->crlf (displayer); | |
2845 | lines++; | |
2846 | if (page_completions && lines >= (displayer->height - 1) && i < count) | |
2847 | { | |
2848 | lines = gdb_display_match_list_pager (lines, displayer); | |
2849 | if (lines < 0) | |
ef0b411a | 2850 | return 0; |
82083d6d DE |
2851 | } |
2852 | } | |
2853 | } | |
2854 | else | |
2855 | { | |
2856 | /* Print the sorted items, across alphabetically, like ls -x. */ | |
2857 | for (i = 1; matches[i]; i++) | |
2858 | { | |
2859 | temp = gdb_printable_part (matches[i]); | |
2860 | printed_len = gdb_print_filename (temp, matches[i], sind, displayer); | |
2861 | /* Have we reached the end of this line? */ | |
2862 | if (matches[i+1]) | |
2863 | { | |
2864 | if (i && (limit > 1) && (i % limit) == 0) | |
2865 | { | |
2866 | displayer->crlf (displayer); | |
2867 | lines++; | |
2868 | if (page_completions && lines >= displayer->height - 1) | |
2869 | { | |
2870 | lines = gdb_display_match_list_pager (lines, displayer); | |
2871 | if (lines < 0) | |
ef0b411a | 2872 | return 0; |
82083d6d DE |
2873 | } |
2874 | } | |
2875 | else | |
2876 | for (k = 0; k < max - printed_len; k++) | |
2877 | displayer->putch (displayer, ' '); | |
2878 | } | |
2879 | } | |
2880 | displayer->crlf (displayer); | |
2881 | } | |
ef0b411a GB |
2882 | |
2883 | return 1; | |
82083d6d DE |
2884 | } |
2885 | ||
2886 | /* Utility for displaying completion list matches, used by both CLI and TUI. | |
2887 | ||
2888 | MATCHES is the list of strings, in argv format, LEN is the number of | |
05cdcf3d DE |
2889 | strings in MATCHES, and MAX is the length of the longest string in |
2890 | MATCHES. */ | |
82083d6d DE |
2891 | |
2892 | void | |
2893 | gdb_display_match_list (char **matches, int len, int max, | |
2894 | const struct match_list_displayer *displayer) | |
2895 | { | |
ef0b411a GB |
2896 | /* Readline will never call this if complete_line returned NULL. */ |
2897 | gdb_assert (max_completions != 0); | |
2898 | ||
2899 | /* complete_line will never return more than this. */ | |
2900 | if (max_completions > 0) | |
2901 | gdb_assert (len <= max_completions); | |
2902 | ||
82083d6d DE |
2903 | if (rl_completion_query_items > 0 && len >= rl_completion_query_items) |
2904 | { | |
2905 | char msg[100]; | |
2906 | ||
2907 | /* We can't use *query here because they wait for <RET> which is | |
2908 | wrong here. This follows the readline version as closely as possible | |
2909 | for compatibility's sake. See readline/complete.c. */ | |
2910 | ||
2911 | displayer->crlf (displayer); | |
2912 | ||
2913 | xsnprintf (msg, sizeof (msg), | |
2914 | "Display all %d possibilities? (y or n)", len); | |
2915 | displayer->puts (displayer, msg); | |
2916 | displayer->flush (displayer); | |
2917 | ||
2918 | if (gdb_get_y_or_n (0, displayer) == 0) | |
2919 | { | |
2920 | displayer->crlf (displayer); | |
2921 | return; | |
2922 | } | |
2923 | } | |
2924 | ||
ef0b411a GB |
2925 | if (gdb_display_match_list_1 (matches, len, max, displayer)) |
2926 | { | |
2927 | /* Note: MAX_COMPLETIONS may be -1 or zero, but LEN is always > 0. */ | |
2928 | if (len == max_completions) | |
2929 | { | |
2930 | /* The maximum number of completions has been reached. Warn the user | |
2931 | that there may be more. */ | |
2932 | const char *message = get_max_completions_reached_message (); | |
2933 | ||
2934 | displayer->puts (displayer, message); | |
2935 | displayer->crlf (displayer); | |
2936 | } | |
2937 | } | |
2938 | } | |
ef0b411a | 2939 | |
7f51f2cd AB |
2940 | /* See completer.h. */ |
2941 | ||
2942 | bool | |
2943 | skip_over_slash_fmt (completion_tracker &tracker, const char **args) | |
2944 | { | |
2945 | const char *text = *args; | |
2946 | ||
2947 | if (text[0] == '/') | |
2948 | { | |
2949 | bool in_fmt; | |
2950 | tracker.set_use_custom_word_point (true); | |
2951 | ||
2952 | if (text[1] == '\0') | |
2953 | { | |
2954 | /* The user tried to complete after typing just the '/' character | |
2955 | of the /FMT string. Step the completer past the '/', but we | |
2956 | don't offer any completions. */ | |
2957 | in_fmt = true; | |
2958 | ++text; | |
2959 | } | |
2960 | else | |
2961 | { | |
2962 | /* The user has typed some characters after the '/', we assume | |
2963 | this is a complete /FMT string, first skip over it. */ | |
2964 | text = skip_to_space (text); | |
2965 | ||
2966 | if (*text == '\0') | |
2967 | { | |
2968 | /* We're at the end of the input string. The user has typed | |
2969 | '/FMT' and asked for a completion. Push an empty | |
2970 | completion string, this will cause readline to insert a | |
2971 | space so the user now has '/FMT '. */ | |
2972 | in_fmt = true; | |
2973 | tracker.add_completion (make_unique_xstrdup (text)); | |
2974 | } | |
2975 | else | |
2976 | { | |
2977 | /* The user has already typed things after the /FMT, skip the | |
2978 | whitespace and return false. Whoever called this function | |
2979 | should then try to complete what comes next. */ | |
2980 | in_fmt = false; | |
2981 | text = skip_spaces (text); | |
2982 | } | |
2983 | } | |
2984 | ||
2985 | tracker.advance_custom_word_point_by (text - *args); | |
2986 | *args = text; | |
2987 | return in_fmt; | |
2988 | } | |
2989 | ||
2990 | return false; | |
2991 | } | |
2992 | ||
6c265988 | 2993 | void _initialize_completer (); |
ef0b411a | 2994 | void |
6c265988 | 2995 | _initialize_completer () |
ef0b411a GB |
2996 | { |
2997 | add_setshow_zuinteger_unlimited_cmd ("max-completions", no_class, | |
2998 | &max_completions, _("\ | |
2999 | Set maximum number of completion candidates."), _("\ | |
3000 | Show maximum number of completion candidates."), _("\ | |
3001 | Use this to limit the number of candidates considered\n\ | |
3002 | during completion. Specifying \"unlimited\" or -1\n\ | |
3003 | disables limiting. Note that setting either no limit or\n\ | |
3004 | a very large limit can make completion slow."), | |
3005 | NULL, NULL, &setlist, &showlist); | |
82083d6d | 3006 | } |