Commit | Line | Data |
---|---|---|
c5f0f3d0 | 1 | /* Line completion stuff for GDB, the GNU debugger. |
9b254dd1 | 2 | Copyright (C) 2000, 2001, 2007, 2008 Free Software Foundation, Inc. |
c5f0f3d0 FN |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
c5f0f3d0 FN |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c5f0f3d0 FN |
18 | |
19 | #include "defs.h" | |
20 | #include "symtab.h" | |
21 | #include "gdbtypes.h" | |
22 | #include "expression.h" | |
9c3f90bd | 23 | #include "filenames.h" /* For DOSish file names. */ |
51065942 | 24 | #include "language.h" |
c5f0f3d0 | 25 | |
18a642a1 AC |
26 | #include "cli/cli-decode.h" |
27 | ||
03717487 MS |
28 | /* FIXME: This is needed because of lookup_cmd_1 (). We should be |
29 | calling a hook instead so we eliminate the CLI dependency. */ | |
c5f0f3d0 FN |
30 | #include "gdbcmd.h" |
31 | ||
c94fdfd0 | 32 | /* Needed for rl_completer_word_break_characters() and for |
38017ce8 | 33 | rl_filename_completion_function. */ |
dbda9972 | 34 | #include "readline/readline.h" |
c5f0f3d0 FN |
35 | |
36 | /* readline defines this. */ | |
37 | #undef savestring | |
38 | ||
39 | #include "completer.h" | |
40 | ||
9c3f90bd | 41 | /* Prototypes for local functions. */ |
38017ce8 | 42 | static |
03717487 MS |
43 | char *line_completion_function (const char *text, int matches, |
44 | char *line_buffer, | |
d75b5104 | 45 | int point); |
c5f0f3d0 FN |
46 | |
47 | /* readline uses the word breaks for two things: | |
48 | (1) In figuring out where to point the TEXT parameter to the | |
49 | rl_completion_entry_function. Since we don't use TEXT for much, | |
50 | it doesn't matter a lot what the word breaks are for this purpose, but | |
51 | it does affect how much stuff M-? lists. | |
52 | (2) If one of the matches contains a word break character, readline | |
53 | will quote it. That's why we switch between | |
51065942 | 54 | current_language->la_word_break_characters() and |
c5f0f3d0 FN |
55 | gdb_completer_command_word_break_characters. I'm not sure when |
56 | we need this behavior (perhaps for funky characters in C++ symbols?). */ | |
57 | ||
58 | /* Variables which are necessary for fancy command line editing. */ | |
c5f0f3d0 FN |
59 | |
60 | /* When completing on command names, we remove '-' from the list of | |
61 | word break characters, since we use it in command names. If the | |
62 | readline library sees one in any of the current completion strings, | |
63 | it thinks that the string needs to be quoted and automatically supplies | |
9c3f90bd | 64 | a leading quote. */ |
c5f0f3d0 FN |
65 | static char *gdb_completer_command_word_break_characters = |
66 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,"; | |
67 | ||
68 | /* When completing on file names, we remove from the list of word | |
69 | break characters any characters that are commonly used in file | |
70 | names, such as '-', '+', '~', etc. Otherwise, readline displays | |
71 | incorrect completion candidates. */ | |
c3690141 | 72 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
7830cf6f EZ |
73 | /* MS-DOS and MS-Windows use colon as part of the drive spec, and most |
74 | programs support @foo style response files. */ | |
75 | static char *gdb_completer_file_name_break_characters = " \t\n*|\"';?><@"; | |
76 | #else | |
77 | static char *gdb_completer_file_name_break_characters = " \t\n*|\"';:?><"; | |
78 | #endif | |
c5f0f3d0 | 79 | |
c94fdfd0 EZ |
80 | /* These are used when completing on locations, which can mix file |
81 | names and symbol names separated by a colon. */ | |
82 | static char *gdb_completer_loc_break_characters = " \t\n*|\"';:?><,"; | |
83 | ||
c5f0f3d0 FN |
84 | /* Characters that can be used to quote completion strings. Note that we |
85 | can't include '"' because the gdb C parser treats such quoted sequences | |
9c3f90bd | 86 | as strings. */ |
c5f0f3d0 FN |
87 | static char *gdb_completer_quote_characters = "'"; |
88 | \f | |
9c3f90bd | 89 | /* Accessor for some completer data that may interest other files. */ |
c5f0f3d0 | 90 | |
c5f0f3d0 FN |
91 | char * |
92 | get_gdb_completer_quote_characters (void) | |
93 | { | |
94 | return gdb_completer_quote_characters; | |
95 | } | |
96 | ||
d75b5104 EZ |
97 | /* Line completion interface function for readline. */ |
98 | ||
99 | char * | |
38017ce8 | 100 | readline_line_completion_function (const char *text, int matches) |
d75b5104 EZ |
101 | { |
102 | return line_completion_function (text, matches, rl_line_buffer, rl_point); | |
103 | } | |
104 | ||
105 | /* This can be used for functions which don't want to complete on symbols | |
106 | but don't want to complete on anything else either. */ | |
107 | char ** | |
108 | noop_completer (char *text, char *prefix) | |
109 | { | |
110 | return NULL; | |
111 | } | |
112 | ||
c5f0f3d0 FN |
113 | /* Complete on filenames. */ |
114 | char ** | |
115 | filename_completer (char *text, char *word) | |
116 | { | |
c5f0f3d0 FN |
117 | int subsequent_name; |
118 | char **return_val; | |
119 | int return_val_used; | |
120 | int return_val_alloced; | |
121 | ||
122 | return_val_used = 0; | |
123 | /* Small for testing. */ | |
124 | return_val_alloced = 1; | |
125 | return_val = (char **) xmalloc (return_val_alloced * sizeof (char *)); | |
126 | ||
127 | subsequent_name = 0; | |
128 | while (1) | |
129 | { | |
1e8189fb | 130 | char *p, *q; |
38017ce8 | 131 | p = rl_filename_completion_function (text, subsequent_name); |
c5f0f3d0 FN |
132 | if (return_val_used >= return_val_alloced) |
133 | { | |
134 | return_val_alloced *= 2; | |
135 | return_val = | |
136 | (char **) xrealloc (return_val, | |
137 | return_val_alloced * sizeof (char *)); | |
138 | } | |
139 | if (p == NULL) | |
140 | { | |
141 | return_val[return_val_used++] = p; | |
142 | break; | |
143 | } | |
144 | /* We need to set subsequent_name to a non-zero value before the | |
145 | continue line below, because otherwise, if the first file seen | |
146 | by GDB is a backup file whose name ends in a `~', we will loop | |
147 | indefinitely. */ | |
148 | subsequent_name = 1; | |
149 | /* Like emacs, don't complete on old versions. Especially useful | |
150 | in the "source" command. */ | |
151 | if (p[strlen (p) - 1] == '~') | |
1e8189fb MS |
152 | { |
153 | xfree (p); | |
154 | continue; | |
155 | } | |
c5f0f3d0 | 156 | |
1e8189fb MS |
157 | if (word == text) |
158 | /* Return exactly p. */ | |
159 | return_val[return_val_used++] = p; | |
160 | else if (word > text) | |
161 | { | |
162 | /* Return some portion of p. */ | |
163 | q = xmalloc (strlen (p) + 5); | |
164 | strcpy (q, p + (word - text)); | |
165 | return_val[return_val_used++] = q; | |
166 | xfree (p); | |
167 | } | |
168 | else | |
169 | { | |
170 | /* Return some of TEXT plus p. */ | |
171 | q = xmalloc (strlen (p) + (text - word) + 5); | |
172 | strncpy (q, word, text - word); | |
173 | q[text - word] = '\0'; | |
174 | strcat (q, p); | |
175 | return_val[return_val_used++] = q; | |
176 | xfree (p); | |
177 | } | |
c5f0f3d0 FN |
178 | } |
179 | #if 0 | |
180 | /* There is no way to do this just long enough to affect quote inserting | |
181 | without also affecting the next completion. This should be fixed in | |
182 | readline. FIXME. */ | |
489f0516 | 183 | /* Ensure that readline does the right thing |
c5f0f3d0 FN |
184 | with respect to inserting quotes. */ |
185 | rl_completer_word_break_characters = ""; | |
186 | #endif | |
187 | return return_val; | |
188 | } | |
189 | ||
c94fdfd0 EZ |
190 | /* Complete on locations, which might be of two possible forms: |
191 | ||
192 | file:line | |
193 | or | |
194 | symbol+offset | |
195 | ||
196 | This is intended to be used in commands that set breakpoints etc. */ | |
197 | char ** | |
198 | location_completer (char *text, char *word) | |
199 | { | |
200 | int n_syms = 0, n_files = 0; | |
201 | char ** fn_list = NULL; | |
202 | char ** list = NULL; | |
203 | char *p; | |
204 | int quote_found = 0; | |
205 | int quoted = *text == '\'' || *text == '"'; | |
206 | int quote_char = '\0'; | |
207 | char *colon = NULL; | |
208 | char *file_to_match = NULL; | |
209 | char *symbol_start = text; | |
210 | char *orig_text = text; | |
211 | size_t text_len; | |
212 | ||
213 | /* Do we have an unquoted colon, as in "break foo.c::bar"? */ | |
214 | for (p = text; *p != '\0'; ++p) | |
215 | { | |
216 | if (*p == '\\' && p[1] == '\'') | |
217 | p++; | |
218 | else if (*p == '\'' || *p == '"') | |
219 | { | |
220 | quote_found = *p; | |
221 | quote_char = *p++; | |
222 | while (*p != '\0' && *p != quote_found) | |
223 | { | |
224 | if (*p == '\\' && p[1] == quote_found) | |
225 | p++; | |
226 | p++; | |
227 | } | |
228 | ||
229 | if (*p == quote_found) | |
230 | quote_found = 0; | |
231 | else | |
9c3f90bd | 232 | break; /* Hit the end of text. */ |
c94fdfd0 EZ |
233 | } |
234 | #if HAVE_DOS_BASED_FILE_SYSTEM | |
235 | /* If we have a DOS-style absolute file name at the beginning of | |
236 | TEXT, and the colon after the drive letter is the only colon | |
237 | we found, pretend the colon is not there. */ | |
238 | else if (p < text + 3 && *p == ':' && p == text + 1 + quoted) | |
239 | ; | |
240 | #endif | |
241 | else if (*p == ':' && !colon) | |
242 | { | |
243 | colon = p; | |
244 | symbol_start = p + 1; | |
245 | } | |
51065942 | 246 | else if (strchr (current_language->la_word_break_characters(), *p)) |
c94fdfd0 EZ |
247 | symbol_start = p + 1; |
248 | } | |
249 | ||
250 | if (quoted) | |
251 | text++; | |
252 | text_len = strlen (text); | |
253 | ||
254 | /* Where is the file name? */ | |
255 | if (colon) | |
256 | { | |
257 | char *s; | |
258 | ||
259 | file_to_match = (char *) xmalloc (colon - text + 1); | |
260 | strncpy (file_to_match, text, colon - text + 1); | |
261 | /* Remove trailing colons and quotes from the file name. */ | |
262 | for (s = file_to_match + (colon - text); | |
263 | s > file_to_match; | |
264 | s--) | |
265 | if (*s == ':' || *s == quote_char) | |
266 | *s = '\0'; | |
267 | } | |
268 | /* If the text includes a colon, they want completion only on a | |
269 | symbol name after the colon. Otherwise, we need to complete on | |
270 | symbols as well as on files. */ | |
271 | if (colon) | |
272 | { | |
273 | list = make_file_symbol_completion_list (symbol_start, word, | |
274 | file_to_match); | |
275 | xfree (file_to_match); | |
276 | } | |
277 | else | |
278 | { | |
279 | list = make_symbol_completion_list (symbol_start, word); | |
280 | /* If text includes characters which cannot appear in a file | |
281 | name, they cannot be asking for completion on files. */ | |
1f20ed91 MS |
282 | if (strcspn (text, |
283 | gdb_completer_file_name_break_characters) == text_len) | |
c94fdfd0 EZ |
284 | fn_list = make_source_files_completion_list (text, text); |
285 | } | |
286 | ||
287 | /* How many completions do we have in both lists? */ | |
288 | if (fn_list) | |
289 | for ( ; fn_list[n_files]; n_files++) | |
290 | ; | |
291 | if (list) | |
292 | for ( ; list[n_syms]; n_syms++) | |
293 | ; | |
294 | ||
295 | /* Make list[] large enough to hold both lists, then catenate | |
296 | fn_list[] onto the end of list[]. */ | |
297 | if (n_syms && n_files) | |
298 | { | |
299 | list = xrealloc (list, (n_syms + n_files + 1) * sizeof (char *)); | |
300 | memcpy (list + n_syms, fn_list, (n_files + 1) * sizeof (char *)); | |
301 | xfree (fn_list); | |
302 | } | |
303 | else if (n_files) | |
304 | { | |
305 | /* If we only have file names as possible completion, we should | |
306 | bring them in sync with what rl_complete expects. The | |
307 | problem is that if the user types "break /foo/b TAB", and the | |
308 | possible completions are "/foo/bar" and "/foo/baz" | |
309 | rl_complete expects us to return "bar" and "baz", without the | |
310 | leading directories, as possible completions, because `word' | |
311 | starts at the "b". But we ignore the value of `word' when we | |
312 | call make_source_files_completion_list above (because that | |
313 | would not DTRT when the completion results in both symbols | |
314 | and file names), so make_source_files_completion_list returns | |
315 | the full "/foo/bar" and "/foo/baz" strings. This produces | |
316 | wrong results when, e.g., there's only one possible | |
317 | completion, because rl_complete will prepend "/foo/" to each | |
318 | candidate completion. The loop below removes that leading | |
319 | part. */ | |
320 | for (n_files = 0; fn_list[n_files]; n_files++) | |
321 | { | |
322 | memmove (fn_list[n_files], fn_list[n_files] + (word - text), | |
323 | strlen (fn_list[n_files]) + 1 - (word - text)); | |
324 | } | |
325 | /* Return just the file-name list as the result. */ | |
326 | list = fn_list; | |
327 | } | |
328 | else if (!n_syms) | |
329 | { | |
330 | /* No completions at all. As the final resort, try completing | |
331 | on the entire text as a symbol. */ | |
332 | list = make_symbol_completion_list (orig_text, word); | |
1f20ed91 | 333 | xfree (fn_list); |
c94fdfd0 | 334 | } |
1f20ed91 MS |
335 | else |
336 | xfree (fn_list); | |
c94fdfd0 EZ |
337 | |
338 | return list; | |
339 | } | |
340 | ||
db60ec62 EZ |
341 | /* Complete on command names. Used by "help". */ |
342 | char ** | |
343 | command_completer (char *text, char *word) | |
344 | { | |
345 | return complete_on_cmdlist (cmdlist, text, word); | |
346 | } | |
347 | ||
348 | ||
c5f0f3d0 FN |
349 | /* Here are some useful test cases for completion. FIXME: These should |
350 | be put in the test suite. They should be tested with both M-? and TAB. | |
351 | ||
352 | "show output-" "radix" | |
353 | "show output" "-radix" | |
354 | "p" ambiguous (commands starting with p--path, print, printf, etc.) | |
355 | "p " ambiguous (all symbols) | |
356 | "info t foo" no completions | |
357 | "info t " no completions | |
358 | "info t" ambiguous ("info target", "info terminal", etc.) | |
359 | "info ajksdlfk" no completions | |
360 | "info ajksdlfk " no completions | |
361 | "info" " " | |
362 | "info " ambiguous (all info commands) | |
363 | "p \"a" no completions (string constant) | |
364 | "p 'a" ambiguous (all symbols starting with a) | |
365 | "p b-a" ambiguous (all symbols starting with a) | |
366 | "p b-" ambiguous (all symbols) | |
367 | "file Make" "file" (word break hard to screw up here) | |
368 | "file ../gdb.stabs/we" "ird" (needs to not break word at slash) | |
369 | */ | |
370 | ||
83d31a92 TT |
371 | /* Generate completions all at once. Returns a NULL-terminated array |
372 | of strings. Both the array and each element are allocated with | |
373 | xmalloc. It can also return NULL if there are no completions. | |
c5f0f3d0 FN |
374 | |
375 | TEXT is the caller's idea of the "word" we are looking at. | |
376 | ||
c5f0f3d0 FN |
377 | LINE_BUFFER is available to be looked at; it contains the entire text |
378 | of the line. POINT is the offset in that line of the cursor. You | |
83d31a92 | 379 | should pretend that the line ends at POINT. */ |
c5f0f3d0 | 380 | |
83d31a92 | 381 | char ** |
38017ce8 | 382 | complete_line (const char *text, char *line_buffer, int point) |
c5f0f3d0 | 383 | { |
83d31a92 | 384 | char **list = NULL; |
c5f0f3d0 FN |
385 | char *tmp_command, *p; |
386 | /* Pointer within tmp_command which corresponds to text. */ | |
387 | char *word; | |
388 | struct cmd_list_element *c, *result_list; | |
389 | ||
83d31a92 TT |
390 | /* Choose the default set of word break characters to break completions. |
391 | If we later find out that we are doing completions on command strings | |
392 | (as opposed to strings supplied by the individual command completer | |
393 | functions, which can be any string) then we will switch to the | |
394 | special word break set for command strings, which leaves out the | |
395 | '-' character used in some commands. */ | |
c5f0f3d0 | 396 | |
83d31a92 | 397 | rl_completer_word_break_characters = |
51065942 | 398 | current_language->la_word_break_characters(); |
c5f0f3d0 | 399 | |
9c3f90bd | 400 | /* Decide whether to complete on a list of gdb commands or on symbols. */ |
83d31a92 TT |
401 | tmp_command = (char *) alloca (point + 1); |
402 | p = tmp_command; | |
c5f0f3d0 | 403 | |
83d31a92 TT |
404 | strncpy (tmp_command, line_buffer, point); |
405 | tmp_command[point] = '\0'; | |
406 | /* Since text always contains some number of characters leading up | |
407 | to point, we can find the equivalent position in tmp_command | |
408 | by subtracting that many characters from the end of tmp_command. */ | |
409 | word = tmp_command + point - strlen (text); | |
c5f0f3d0 | 410 | |
83d31a92 TT |
411 | if (point == 0) |
412 | { | |
413 | /* An empty line we want to consider ambiguous; that is, it | |
414 | could be any command. */ | |
415 | c = (struct cmd_list_element *) -1; | |
416 | result_list = 0; | |
417 | } | |
418 | else | |
419 | { | |
420 | c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); | |
421 | } | |
c5f0f3d0 | 422 | |
83d31a92 TT |
423 | /* Move p up to the next interesting thing. */ |
424 | while (*p == ' ' || *p == '\t') | |
425 | { | |
426 | p++; | |
427 | } | |
c5f0f3d0 | 428 | |
83d31a92 TT |
429 | if (!c) |
430 | { | |
431 | /* It is an unrecognized command. So there are no | |
432 | possible completions. */ | |
433 | list = NULL; | |
434 | } | |
435 | else if (c == (struct cmd_list_element *) -1) | |
436 | { | |
437 | char *q; | |
438 | ||
439 | /* lookup_cmd_1 advances p up to the first ambiguous thing, but | |
440 | doesn't advance over that thing itself. Do so now. */ | |
441 | q = p; | |
442 | while (*q && (isalnum (*q) || *q == '-' || *q == '_')) | |
443 | ++q; | |
444 | if (q != tmp_command + point) | |
c5f0f3d0 | 445 | { |
83d31a92 TT |
446 | /* There is something beyond the ambiguous |
447 | command, so there are no possible completions. For | |
448 | example, "info t " or "info t foo" does not complete | |
449 | to anything, because "info t" can be "info target" or | |
450 | "info terminal". */ | |
c5f0f3d0 FN |
451 | list = NULL; |
452 | } | |
83d31a92 | 453 | else |
c5f0f3d0 | 454 | { |
83d31a92 TT |
455 | /* We're trying to complete on the command which was ambiguous. |
456 | This we can deal with. */ | |
457 | if (result_list) | |
c5f0f3d0 | 458 | { |
83d31a92 TT |
459 | list = complete_on_cmdlist (*result_list->prefixlist, p, |
460 | word); | |
c5f0f3d0 FN |
461 | } |
462 | else | |
463 | { | |
83d31a92 | 464 | list = complete_on_cmdlist (cmdlist, p, word); |
c5f0f3d0 | 465 | } |
489f0516 | 466 | /* Ensure that readline does the right thing with respect to |
83d31a92 TT |
467 | inserting quotes. */ |
468 | rl_completer_word_break_characters = | |
469 | gdb_completer_command_word_break_characters; | |
c5f0f3d0 | 470 | } |
83d31a92 TT |
471 | } |
472 | else | |
473 | { | |
474 | /* We've recognized a full command. */ | |
475 | ||
476 | if (p == tmp_command + point) | |
c5f0f3d0 | 477 | { |
83d31a92 | 478 | /* There is no non-whitespace in the line beyond the command. */ |
c5f0f3d0 | 479 | |
83d31a92 | 480 | if (p[-1] == ' ' || p[-1] == '\t') |
c5f0f3d0 | 481 | { |
83d31a92 TT |
482 | /* The command is followed by whitespace; we need to complete |
483 | on whatever comes after command. */ | |
484 | if (c->prefixlist) | |
c5f0f3d0 | 485 | { |
83d31a92 TT |
486 | /* It is a prefix command; what comes after it is |
487 | a subcommand (e.g. "info "). */ | |
488 | list = complete_on_cmdlist (*c->prefixlist, p, word); | |
c5f0f3d0 | 489 | |
489f0516 | 490 | /* Ensure that readline does the right thing |
9c3f90bd | 491 | with respect to inserting quotes. */ |
c5f0f3d0 FN |
492 | rl_completer_word_break_characters = |
493 | gdb_completer_command_word_break_characters; | |
494 | } | |
c5f0f3d0 FN |
495 | else if (c->enums) |
496 | { | |
497 | list = complete_on_enum (c->enums, p, word); | |
83d31a92 TT |
498 | rl_completer_word_break_characters = |
499 | gdb_completer_command_word_break_characters; | |
c5f0f3d0 FN |
500 | } |
501 | else | |
502 | { | |
83d31a92 TT |
503 | /* It is a normal command; what comes after it is |
504 | completed by the command's completer function. */ | |
c5f0f3d0 | 505 | if (c->completer == filename_completer) |
7830cf6f | 506 | { |
83d31a92 TT |
507 | /* Many commands which want to complete on |
508 | file names accept several file names, as | |
509 | in "run foo bar >>baz". So we don't want | |
510 | to complete the entire text after the | |
511 | command, just the last word. To this | |
512 | end, we need to find the beginning of the | |
513 | file name by starting at `word' and going | |
514 | backwards. */ | |
7830cf6f EZ |
515 | for (p = word; |
516 | p > tmp_command | |
517 | && strchr (gdb_completer_file_name_break_characters, p[-1]) == NULL; | |
518 | p--) | |
519 | ; | |
520 | rl_completer_word_break_characters = | |
521 | gdb_completer_file_name_break_characters; | |
522 | } | |
c94fdfd0 EZ |
523 | else if (c->completer == location_completer) |
524 | { | |
83d31a92 TT |
525 | /* Commands which complete on locations want to |
526 | see the entire argument. */ | |
c94fdfd0 EZ |
527 | for (p = word; |
528 | p > tmp_command | |
529 | && p[-1] != ' ' && p[-1] != '\t'; | |
530 | p--) | |
531 | ; | |
532 | } | |
7830cf6f | 533 | list = (*c->completer) (p, word); |
c5f0f3d0 FN |
534 | } |
535 | } | |
83d31a92 TT |
536 | else |
537 | { | |
538 | /* The command is not followed by whitespace; we need to | |
539 | complete on the command itself. e.g. "p" which is a | |
540 | command itself but also can complete to "print", "ptype" | |
541 | etc. */ | |
542 | char *q; | |
543 | ||
544 | /* Find the command we are completing on. */ | |
545 | q = p; | |
546 | while (q > tmp_command) | |
547 | { | |
548 | if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_') | |
549 | --q; | |
550 | else | |
551 | break; | |
552 | } | |
553 | ||
554 | list = complete_on_cmdlist (result_list, q, word); | |
555 | ||
489f0516 | 556 | /* Ensure that readline does the right thing |
9c3f90bd | 557 | with respect to inserting quotes. */ |
83d31a92 TT |
558 | rl_completer_word_break_characters = |
559 | gdb_completer_command_word_break_characters; | |
560 | } | |
561 | } | |
562 | else | |
563 | { | |
564 | /* There is non-whitespace beyond the command. */ | |
565 | ||
566 | if (c->prefixlist && !c->allow_unknown) | |
567 | { | |
568 | /* It is an unrecognized subcommand of a prefix command, | |
569 | e.g. "info adsfkdj". */ | |
570 | list = NULL; | |
571 | } | |
572 | else if (c->enums) | |
573 | { | |
574 | list = complete_on_enum (c->enums, p, word); | |
575 | } | |
576 | else | |
577 | { | |
578 | /* It is a normal command. */ | |
579 | if (c->completer == filename_completer) | |
580 | { | |
581 | /* See the commentary above about the specifics | |
582 | of file-name completion. */ | |
583 | for (p = word; | |
584 | p > tmp_command | |
585 | && strchr (gdb_completer_file_name_break_characters, p[-1]) == NULL; | |
586 | p--) | |
587 | ; | |
588 | rl_completer_word_break_characters = | |
589 | gdb_completer_file_name_break_characters; | |
590 | } | |
591 | else if (c->completer == location_completer) | |
592 | { | |
593 | for (p = word; | |
594 | p > tmp_command | |
595 | && p[-1] != ' ' && p[-1] != '\t'; | |
596 | p--) | |
597 | ; | |
598 | } | |
599 | list = (*c->completer) (p, word); | |
600 | } | |
601 | } | |
602 | } | |
603 | ||
604 | return list; | |
605 | } | |
606 | ||
607 | /* Generate completions one by one for the completer. Each time we are | |
608 | called return another potential completion to the caller. | |
609 | line_completion just completes on commands or passes the buck to the | |
610 | command's completer function, the stuff specific to symbol completion | |
611 | is in make_symbol_completion_list. | |
612 | ||
613 | TEXT is the caller's idea of the "word" we are looking at. | |
614 | ||
615 | MATCHES is the number of matches that have currently been collected from | |
616 | calling this completion function. When zero, then we need to initialize, | |
617 | otherwise the initialization has already taken place and we can just | |
618 | return the next potential completion string. | |
619 | ||
620 | LINE_BUFFER is available to be looked at; it contains the entire text | |
621 | of the line. POINT is the offset in that line of the cursor. You | |
622 | should pretend that the line ends at POINT. | |
623 | ||
624 | Returns NULL if there are no more completions, else a pointer to a string | |
625 | which is a possible completion, it is the caller's responsibility to | |
626 | free the string. */ | |
627 | ||
38017ce8 | 628 | static char * |
9c3f90bd MS |
629 | line_completion_function (const char *text, int matches, |
630 | char *line_buffer, int point) | |
83d31a92 | 631 | { |
9c3f90bd MS |
632 | static char **list = (char **) NULL; /* Cache of completions. */ |
633 | static int index; /* Next cached completion. */ | |
83d31a92 TT |
634 | char *output = NULL; |
635 | ||
636 | if (matches == 0) | |
637 | { | |
638 | /* The caller is beginning to accumulate a new set of completions, so | |
639 | we need to find all of them now, and cache them for returning one at | |
9c3f90bd | 640 | a time on future calls. */ |
83d31a92 TT |
641 | |
642 | if (list) | |
643 | { | |
644 | /* Free the storage used by LIST, but not by the strings inside. | |
9c3f90bd | 645 | This is because rl_complete_internal () frees the strings. */ |
83d31a92 | 646 | xfree (list); |
c5f0f3d0 | 647 | } |
83d31a92 TT |
648 | index = 0; |
649 | list = complete_line (text, line_buffer, point); | |
c5f0f3d0 FN |
650 | } |
651 | ||
652 | /* If we found a list of potential completions during initialization then | |
653 | dole them out one at a time. The vector of completions is NULL | |
654 | terminated, so after returning the last one, return NULL (and continue | |
655 | to do so) each time we are called after that, until a new list is | |
9c3f90bd | 656 | available. */ |
c5f0f3d0 FN |
657 | |
658 | if (list) | |
659 | { | |
660 | output = list[index]; | |
661 | if (output) | |
662 | { | |
663 | index++; | |
664 | } | |
665 | } | |
666 | ||
667 | #if 0 | |
668 | /* Can't do this because readline hasn't yet checked the word breaks | |
669 | for figuring out whether to insert a quote. */ | |
670 | if (output == NULL) | |
671 | /* Make sure the word break characters are set back to normal for the | |
672 | next time that readline tries to complete something. */ | |
673 | rl_completer_word_break_characters = | |
51065942 | 674 | current_language->la_word_break_characters(); |
c5f0f3d0 FN |
675 | #endif |
676 | ||
677 | return (output); | |
678 | } | |
4e87b832 KD |
679 | |
680 | /* Skip over the possibly quoted word STR (as defined by the quote | |
681 | characters QUOTECHARS and the the word break characters | |
682 | BREAKCHARS). Returns pointer to the location after the "word". If | |
683 | either QUOTECHARS or BREAKCHARS is NULL, use the same values used | |
684 | by the completer. */ | |
c5f0f3d0 FN |
685 | |
686 | char * | |
4e87b832 | 687 | skip_quoted_chars (char *str, char *quotechars, char *breakchars) |
c5f0f3d0 FN |
688 | { |
689 | char quote_char = '\0'; | |
690 | char *scan; | |
691 | ||
4e87b832 KD |
692 | if (quotechars == NULL) |
693 | quotechars = gdb_completer_quote_characters; | |
694 | ||
695 | if (breakchars == NULL) | |
51065942 | 696 | breakchars = current_language->la_word_break_characters(); |
4e87b832 | 697 | |
c5f0f3d0 FN |
698 | for (scan = str; *scan != '\0'; scan++) |
699 | { | |
700 | if (quote_char != '\0') | |
701 | { | |
9c3f90bd | 702 | /* Ignore everything until the matching close quote char. */ |
c5f0f3d0 FN |
703 | if (*scan == quote_char) |
704 | { | |
9c3f90bd | 705 | /* Found matching close quote. */ |
c5f0f3d0 FN |
706 | scan++; |
707 | break; | |
708 | } | |
709 | } | |
4e87b832 | 710 | else if (strchr (quotechars, *scan)) |
c5f0f3d0 FN |
711 | { |
712 | /* Found start of a quoted string. */ | |
713 | quote_char = *scan; | |
714 | } | |
4e87b832 | 715 | else if (strchr (breakchars, *scan)) |
c5f0f3d0 FN |
716 | { |
717 | break; | |
718 | } | |
719 | } | |
4e87b832 | 720 | |
c5f0f3d0 FN |
721 | return (scan); |
722 | } | |
723 | ||
4e87b832 KD |
724 | /* Skip over the possibly quoted word STR (as defined by the quote |
725 | characters and word break characters used by the completer). | |
9c3f90bd | 726 | Returns pointer to the location after the "word". */ |
4e87b832 KD |
727 | |
728 | char * | |
729 | skip_quoted (char *str) | |
730 | { | |
731 | return skip_quoted_chars (str, NULL, NULL); | |
732 | } |