Commit | Line | Data |
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c5f0f3d0 | 1 | /* Line completion stuff for GDB, the GNU debugger. |
0fb0cc75 | 2 | Copyright (C) 2000, 2001, 2007, 2008, 2009 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 | ||
65d12d83 | 341 | /* Helper for expression_completer which recursively counts the number |
1c71341a | 342 | of named fields and methods in a structure or union type. */ |
65d12d83 TT |
343 | static int |
344 | count_struct_fields (struct type *type) | |
345 | { | |
346 | int i, result = 0; | |
347 | ||
348 | CHECK_TYPEDEF (type); | |
349 | for (i = 0; i < TYPE_NFIELDS (type); ++i) | |
350 | { | |
351 | if (i < TYPE_N_BASECLASSES (type)) | |
352 | result += count_struct_fields (TYPE_BASECLASS (type, i)); | |
353 | else if (TYPE_FIELD_NAME (type, i)) | |
354 | ++result; | |
355 | } | |
1c71341a TT |
356 | |
357 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i) | |
358 | { | |
359 | if (TYPE_FN_FIELDLIST_NAME (type, i)) | |
360 | ++result; | |
361 | } | |
362 | ||
65d12d83 TT |
363 | return result; |
364 | } | |
365 | ||
1c71341a TT |
366 | /* Helper for expression_completer which recursively adds field and |
367 | method names from TYPE, a struct or union type, to the array | |
368 | OUTPUT. This function assumes that OUTPUT is correctly-sized. */ | |
65d12d83 TT |
369 | static void |
370 | add_struct_fields (struct type *type, int *nextp, char **output, | |
371 | char *fieldname, int namelen) | |
372 | { | |
373 | int i; | |
1c71341a | 374 | char *type_name = NULL; |
65d12d83 TT |
375 | |
376 | CHECK_TYPEDEF (type); | |
377 | for (i = 0; i < TYPE_NFIELDS (type); ++i) | |
378 | { | |
379 | if (i < TYPE_N_BASECLASSES (type)) | |
380 | add_struct_fields (TYPE_BASECLASS (type, i), nextp, output, | |
381 | fieldname, namelen); | |
382 | else if (TYPE_FIELD_NAME (type, i) | |
383 | && ! strncmp (TYPE_FIELD_NAME (type, i), fieldname, namelen)) | |
384 | { | |
385 | output[*nextp] = xstrdup (TYPE_FIELD_NAME (type, i)); | |
386 | ++*nextp; | |
387 | } | |
388 | } | |
1c71341a TT |
389 | |
390 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i) | |
391 | { | |
392 | char *name = TYPE_FN_FIELDLIST_NAME (type, i); | |
393 | if (name && ! strncmp (name, fieldname, namelen)) | |
394 | { | |
395 | if (!type_name) | |
396 | type_name = type_name_no_tag (type); | |
397 | /* Omit constructors from the completion list. */ | |
398 | if (strcmp (type_name, name)) | |
399 | { | |
400 | output[*nextp] = xstrdup (name); | |
401 | ++*nextp; | |
402 | } | |
403 | } | |
404 | } | |
65d12d83 TT |
405 | } |
406 | ||
407 | /* Complete on expressions. Often this means completing on symbol | |
408 | names, but some language parsers also have support for completing | |
409 | field names. */ | |
410 | char ** | |
411 | expression_completer (char *text, char *word) | |
412 | { | |
413 | struct type *type; | |
37cd5d19 | 414 | char *fieldname, *p; |
65d12d83 TT |
415 | |
416 | /* Perform a tentative parse of the expression, to see whether a | |
417 | field completion is required. */ | |
418 | fieldname = NULL; | |
419 | type = parse_field_expression (text, &fieldname); | |
420 | if (fieldname && type) | |
421 | { | |
422 | for (;;) | |
423 | { | |
424 | CHECK_TYPEDEF (type); | |
425 | if (TYPE_CODE (type) != TYPE_CODE_PTR | |
426 | && TYPE_CODE (type) != TYPE_CODE_REF) | |
427 | break; | |
428 | type = TYPE_TARGET_TYPE (type); | |
429 | } | |
430 | ||
431 | if (TYPE_CODE (type) == TYPE_CODE_UNION | |
432 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
433 | { | |
434 | int alloc = count_struct_fields (type); | |
435 | int flen = strlen (fieldname); | |
436 | int out = 0; | |
437 | char **result = (char **) xmalloc ((alloc + 1) * sizeof (char *)); | |
438 | ||
439 | add_struct_fields (type, &out, result, fieldname, flen); | |
440 | result[out] = NULL; | |
a0b7aece | 441 | xfree (fieldname); |
65d12d83 TT |
442 | return result; |
443 | } | |
444 | } | |
a0b7aece | 445 | xfree (fieldname); |
65d12d83 | 446 | |
37cd5d19 TT |
447 | /* Commands which complete on locations want to see the entire |
448 | argument. */ | |
449 | for (p = word; | |
450 | p > text && p[-1] != ' ' && p[-1] != '\t'; | |
451 | p--) | |
452 | ; | |
453 | ||
65d12d83 | 454 | /* Not ideal but it is what we used to do before... */ |
37cd5d19 | 455 | return location_completer (p, word); |
65d12d83 TT |
456 | } |
457 | ||
c5f0f3d0 FN |
458 | /* Here are some useful test cases for completion. FIXME: These should |
459 | be put in the test suite. They should be tested with both M-? and TAB. | |
460 | ||
461 | "show output-" "radix" | |
462 | "show output" "-radix" | |
463 | "p" ambiguous (commands starting with p--path, print, printf, etc.) | |
464 | "p " ambiguous (all symbols) | |
465 | "info t foo" no completions | |
466 | "info t " no completions | |
467 | "info t" ambiguous ("info target", "info terminal", etc.) | |
468 | "info ajksdlfk" no completions | |
469 | "info ajksdlfk " no completions | |
470 | "info" " " | |
471 | "info " ambiguous (all info commands) | |
472 | "p \"a" no completions (string constant) | |
473 | "p 'a" ambiguous (all symbols starting with a) | |
474 | "p b-a" ambiguous (all symbols starting with a) | |
475 | "p b-" ambiguous (all symbols) | |
476 | "file Make" "file" (word break hard to screw up here) | |
477 | "file ../gdb.stabs/we" "ird" (needs to not break word at slash) | |
478 | */ | |
479 | ||
83d31a92 TT |
480 | /* Generate completions all at once. Returns a NULL-terminated array |
481 | of strings. Both the array and each element are allocated with | |
482 | xmalloc. It can also return NULL if there are no completions. | |
c5f0f3d0 FN |
483 | |
484 | TEXT is the caller's idea of the "word" we are looking at. | |
485 | ||
c5f0f3d0 FN |
486 | LINE_BUFFER is available to be looked at; it contains the entire text |
487 | of the line. POINT is the offset in that line of the cursor. You | |
14032a66 TT |
488 | should pretend that the line ends at POINT. |
489 | ||
490 | FOR_HELP is true when completing a 'help' command. In this case, | |
491 | once sub-command completions are exhausted, we simply return NULL. | |
492 | When FOR_HELP is false, we will call a sub-command's completion | |
493 | function. */ | |
494 | ||
495 | static char ** | |
496 | complete_line_internal (const char *text, char *line_buffer, int point, | |
497 | int for_help) | |
c5f0f3d0 | 498 | { |
83d31a92 | 499 | char **list = NULL; |
c5f0f3d0 FN |
500 | char *tmp_command, *p; |
501 | /* Pointer within tmp_command which corresponds to text. */ | |
502 | char *word; | |
503 | struct cmd_list_element *c, *result_list; | |
504 | ||
83d31a92 TT |
505 | /* Choose the default set of word break characters to break completions. |
506 | If we later find out that we are doing completions on command strings | |
507 | (as opposed to strings supplied by the individual command completer | |
508 | functions, which can be any string) then we will switch to the | |
509 | special word break set for command strings, which leaves out the | |
510 | '-' character used in some commands. */ | |
c5f0f3d0 | 511 | |
83d31a92 | 512 | rl_completer_word_break_characters = |
51065942 | 513 | current_language->la_word_break_characters(); |
c5f0f3d0 | 514 | |
9c3f90bd | 515 | /* Decide whether to complete on a list of gdb commands or on symbols. */ |
83d31a92 TT |
516 | tmp_command = (char *) alloca (point + 1); |
517 | p = tmp_command; | |
c5f0f3d0 | 518 | |
83d31a92 TT |
519 | strncpy (tmp_command, line_buffer, point); |
520 | tmp_command[point] = '\0'; | |
521 | /* Since text always contains some number of characters leading up | |
522 | to point, we can find the equivalent position in tmp_command | |
523 | by subtracting that many characters from the end of tmp_command. */ | |
524 | word = tmp_command + point - strlen (text); | |
c5f0f3d0 | 525 | |
83d31a92 TT |
526 | if (point == 0) |
527 | { | |
528 | /* An empty line we want to consider ambiguous; that is, it | |
529 | could be any command. */ | |
530 | c = (struct cmd_list_element *) -1; | |
531 | result_list = 0; | |
532 | } | |
533 | else | |
534 | { | |
535 | c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); | |
536 | } | |
c5f0f3d0 | 537 | |
83d31a92 TT |
538 | /* Move p up to the next interesting thing. */ |
539 | while (*p == ' ' || *p == '\t') | |
540 | { | |
541 | p++; | |
542 | } | |
c5f0f3d0 | 543 | |
83d31a92 TT |
544 | if (!c) |
545 | { | |
546 | /* It is an unrecognized command. So there are no | |
547 | possible completions. */ | |
548 | list = NULL; | |
549 | } | |
550 | else if (c == (struct cmd_list_element *) -1) | |
551 | { | |
552 | char *q; | |
553 | ||
554 | /* lookup_cmd_1 advances p up to the first ambiguous thing, but | |
555 | doesn't advance over that thing itself. Do so now. */ | |
556 | q = p; | |
557 | while (*q && (isalnum (*q) || *q == '-' || *q == '_')) | |
558 | ++q; | |
559 | if (q != tmp_command + point) | |
c5f0f3d0 | 560 | { |
83d31a92 TT |
561 | /* There is something beyond the ambiguous |
562 | command, so there are no possible completions. For | |
563 | example, "info t " or "info t foo" does not complete | |
564 | to anything, because "info t" can be "info target" or | |
565 | "info terminal". */ | |
c5f0f3d0 FN |
566 | list = NULL; |
567 | } | |
83d31a92 | 568 | else |
c5f0f3d0 | 569 | { |
83d31a92 TT |
570 | /* We're trying to complete on the command which was ambiguous. |
571 | This we can deal with. */ | |
572 | if (result_list) | |
c5f0f3d0 | 573 | { |
83d31a92 TT |
574 | list = complete_on_cmdlist (*result_list->prefixlist, p, |
575 | word); | |
c5f0f3d0 FN |
576 | } |
577 | else | |
578 | { | |
83d31a92 | 579 | list = complete_on_cmdlist (cmdlist, p, word); |
c5f0f3d0 | 580 | } |
489f0516 | 581 | /* Ensure that readline does the right thing with respect to |
83d31a92 TT |
582 | inserting quotes. */ |
583 | rl_completer_word_break_characters = | |
584 | gdb_completer_command_word_break_characters; | |
c5f0f3d0 | 585 | } |
83d31a92 TT |
586 | } |
587 | else | |
588 | { | |
589 | /* We've recognized a full command. */ | |
590 | ||
591 | if (p == tmp_command + point) | |
c5f0f3d0 | 592 | { |
83d31a92 | 593 | /* There is no non-whitespace in the line beyond the command. */ |
c5f0f3d0 | 594 | |
83d31a92 | 595 | if (p[-1] == ' ' || p[-1] == '\t') |
c5f0f3d0 | 596 | { |
83d31a92 TT |
597 | /* The command is followed by whitespace; we need to complete |
598 | on whatever comes after command. */ | |
599 | if (c->prefixlist) | |
c5f0f3d0 | 600 | { |
83d31a92 TT |
601 | /* It is a prefix command; what comes after it is |
602 | a subcommand (e.g. "info "). */ | |
603 | list = complete_on_cmdlist (*c->prefixlist, p, word); | |
c5f0f3d0 | 604 | |
489f0516 | 605 | /* Ensure that readline does the right thing |
9c3f90bd | 606 | with respect to inserting quotes. */ |
c5f0f3d0 FN |
607 | rl_completer_word_break_characters = |
608 | gdb_completer_command_word_break_characters; | |
609 | } | |
14032a66 TT |
610 | else if (for_help) |
611 | list = NULL; | |
c5f0f3d0 FN |
612 | else if (c->enums) |
613 | { | |
614 | list = complete_on_enum (c->enums, p, word); | |
83d31a92 TT |
615 | rl_completer_word_break_characters = |
616 | gdb_completer_command_word_break_characters; | |
c5f0f3d0 FN |
617 | } |
618 | else | |
619 | { | |
83d31a92 TT |
620 | /* It is a normal command; what comes after it is |
621 | completed by the command's completer function. */ | |
c5f0f3d0 | 622 | if (c->completer == filename_completer) |
7830cf6f | 623 | { |
83d31a92 TT |
624 | /* Many commands which want to complete on |
625 | file names accept several file names, as | |
626 | in "run foo bar >>baz". So we don't want | |
627 | to complete the entire text after the | |
628 | command, just the last word. To this | |
629 | end, we need to find the beginning of the | |
630 | file name by starting at `word' and going | |
631 | backwards. */ | |
7830cf6f EZ |
632 | for (p = word; |
633 | p > tmp_command | |
634 | && strchr (gdb_completer_file_name_break_characters, p[-1]) == NULL; | |
635 | p--) | |
636 | ; | |
637 | rl_completer_word_break_characters = | |
638 | gdb_completer_file_name_break_characters; | |
639 | } | |
37cd5d19 | 640 | else if (c->completer == location_completer) |
c94fdfd0 | 641 | { |
83d31a92 TT |
642 | /* Commands which complete on locations want to |
643 | see the entire argument. */ | |
c94fdfd0 EZ |
644 | for (p = word; |
645 | p > tmp_command | |
646 | && p[-1] != ' ' && p[-1] != '\t'; | |
647 | p--) | |
648 | ; | |
649 | } | |
7830cf6f | 650 | list = (*c->completer) (p, word); |
c5f0f3d0 FN |
651 | } |
652 | } | |
83d31a92 TT |
653 | else |
654 | { | |
655 | /* The command is not followed by whitespace; we need to | |
656 | complete on the command itself. e.g. "p" which is a | |
657 | command itself but also can complete to "print", "ptype" | |
658 | etc. */ | |
659 | char *q; | |
660 | ||
661 | /* Find the command we are completing on. */ | |
662 | q = p; | |
663 | while (q > tmp_command) | |
664 | { | |
665 | if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_') | |
666 | --q; | |
667 | else | |
668 | break; | |
669 | } | |
670 | ||
671 | list = complete_on_cmdlist (result_list, q, word); | |
672 | ||
489f0516 | 673 | /* Ensure that readline does the right thing |
9c3f90bd | 674 | with respect to inserting quotes. */ |
83d31a92 TT |
675 | rl_completer_word_break_characters = |
676 | gdb_completer_command_word_break_characters; | |
677 | } | |
678 | } | |
14032a66 TT |
679 | else if (for_help) |
680 | list = NULL; | |
83d31a92 TT |
681 | else |
682 | { | |
683 | /* There is non-whitespace beyond the command. */ | |
684 | ||
685 | if (c->prefixlist && !c->allow_unknown) | |
686 | { | |
687 | /* It is an unrecognized subcommand of a prefix command, | |
688 | e.g. "info adsfkdj". */ | |
689 | list = NULL; | |
690 | } | |
691 | else if (c->enums) | |
692 | { | |
693 | list = complete_on_enum (c->enums, p, word); | |
694 | } | |
695 | else | |
696 | { | |
697 | /* It is a normal command. */ | |
698 | if (c->completer == filename_completer) | |
699 | { | |
700 | /* See the commentary above about the specifics | |
701 | of file-name completion. */ | |
702 | for (p = word; | |
703 | p > tmp_command | |
704 | && strchr (gdb_completer_file_name_break_characters, p[-1]) == NULL; | |
705 | p--) | |
706 | ; | |
707 | rl_completer_word_break_characters = | |
708 | gdb_completer_file_name_break_characters; | |
709 | } | |
37cd5d19 | 710 | else if (c->completer == location_completer) |
83d31a92 TT |
711 | { |
712 | for (p = word; | |
713 | p > tmp_command | |
714 | && p[-1] != ' ' && p[-1] != '\t'; | |
715 | p--) | |
716 | ; | |
717 | } | |
718 | list = (*c->completer) (p, word); | |
719 | } | |
720 | } | |
721 | } | |
722 | ||
723 | return list; | |
724 | } | |
725 | ||
14032a66 TT |
726 | /* Like complete_line_internal, but always passes 0 for FOR_HELP. */ |
727 | ||
728 | char ** | |
729 | complete_line (const char *text, char *line_buffer, int point) | |
730 | { | |
731 | return complete_line_internal (text, line_buffer, point, 0); | |
732 | } | |
733 | ||
734 | /* Complete on command names. Used by "help". */ | |
735 | char ** | |
736 | command_completer (char *text, char *word) | |
737 | { | |
738 | return complete_line_internal (word, text, strlen (text), 1); | |
739 | } | |
740 | ||
83d31a92 TT |
741 | /* Generate completions one by one for the completer. Each time we are |
742 | called return another potential completion to the caller. | |
743 | line_completion just completes on commands or passes the buck to the | |
744 | command's completer function, the stuff specific to symbol completion | |
745 | is in make_symbol_completion_list. | |
746 | ||
747 | TEXT is the caller's idea of the "word" we are looking at. | |
748 | ||
749 | MATCHES is the number of matches that have currently been collected from | |
750 | calling this completion function. When zero, then we need to initialize, | |
751 | otherwise the initialization has already taken place and we can just | |
752 | return the next potential completion string. | |
753 | ||
754 | LINE_BUFFER is available to be looked at; it contains the entire text | |
755 | of the line. POINT is the offset in that line of the cursor. You | |
756 | should pretend that the line ends at POINT. | |
757 | ||
758 | Returns NULL if there are no more completions, else a pointer to a string | |
759 | which is a possible completion, it is the caller's responsibility to | |
760 | free the string. */ | |
761 | ||
38017ce8 | 762 | static char * |
9c3f90bd MS |
763 | line_completion_function (const char *text, int matches, |
764 | char *line_buffer, int point) | |
83d31a92 | 765 | { |
9c3f90bd MS |
766 | static char **list = (char **) NULL; /* Cache of completions. */ |
767 | static int index; /* Next cached completion. */ | |
83d31a92 TT |
768 | char *output = NULL; |
769 | ||
770 | if (matches == 0) | |
771 | { | |
772 | /* The caller is beginning to accumulate a new set of completions, so | |
773 | we need to find all of them now, and cache them for returning one at | |
9c3f90bd | 774 | a time on future calls. */ |
83d31a92 TT |
775 | |
776 | if (list) | |
777 | { | |
778 | /* Free the storage used by LIST, but not by the strings inside. | |
6f4de6c9 JK |
779 | This is because rl_complete_internal () frees the strings. |
780 | As complete_line may abort by calling `error' clear LIST now. */ | |
83d31a92 | 781 | xfree (list); |
6f4de6c9 | 782 | list = NULL; |
c5f0f3d0 | 783 | } |
83d31a92 TT |
784 | index = 0; |
785 | list = complete_line (text, line_buffer, point); | |
c5f0f3d0 FN |
786 | } |
787 | ||
788 | /* If we found a list of potential completions during initialization then | |
789 | dole them out one at a time. The vector of completions is NULL | |
790 | terminated, so after returning the last one, return NULL (and continue | |
791 | to do so) each time we are called after that, until a new list is | |
9c3f90bd | 792 | available. */ |
c5f0f3d0 FN |
793 | |
794 | if (list) | |
795 | { | |
796 | output = list[index]; | |
797 | if (output) | |
798 | { | |
799 | index++; | |
800 | } | |
801 | } | |
802 | ||
803 | #if 0 | |
804 | /* Can't do this because readline hasn't yet checked the word breaks | |
805 | for figuring out whether to insert a quote. */ | |
806 | if (output == NULL) | |
807 | /* Make sure the word break characters are set back to normal for the | |
808 | next time that readline tries to complete something. */ | |
809 | rl_completer_word_break_characters = | |
51065942 | 810 | current_language->la_word_break_characters(); |
c5f0f3d0 FN |
811 | #endif |
812 | ||
813 | return (output); | |
814 | } | |
4e87b832 KD |
815 | |
816 | /* Skip over the possibly quoted word STR (as defined by the quote | |
817 | characters QUOTECHARS and the the word break characters | |
818 | BREAKCHARS). Returns pointer to the location after the "word". If | |
819 | either QUOTECHARS or BREAKCHARS is NULL, use the same values used | |
820 | by the completer. */ | |
c5f0f3d0 FN |
821 | |
822 | char * | |
4e87b832 | 823 | skip_quoted_chars (char *str, char *quotechars, char *breakchars) |
c5f0f3d0 FN |
824 | { |
825 | char quote_char = '\0'; | |
826 | char *scan; | |
827 | ||
4e87b832 KD |
828 | if (quotechars == NULL) |
829 | quotechars = gdb_completer_quote_characters; | |
830 | ||
831 | if (breakchars == NULL) | |
51065942 | 832 | breakchars = current_language->la_word_break_characters(); |
4e87b832 | 833 | |
c5f0f3d0 FN |
834 | for (scan = str; *scan != '\0'; scan++) |
835 | { | |
836 | if (quote_char != '\0') | |
837 | { | |
9c3f90bd | 838 | /* Ignore everything until the matching close quote char. */ |
c5f0f3d0 FN |
839 | if (*scan == quote_char) |
840 | { | |
9c3f90bd | 841 | /* Found matching close quote. */ |
c5f0f3d0 FN |
842 | scan++; |
843 | break; | |
844 | } | |
845 | } | |
4e87b832 | 846 | else if (strchr (quotechars, *scan)) |
c5f0f3d0 FN |
847 | { |
848 | /* Found start of a quoted string. */ | |
849 | quote_char = *scan; | |
850 | } | |
4e87b832 | 851 | else if (strchr (breakchars, *scan)) |
c5f0f3d0 FN |
852 | { |
853 | break; | |
854 | } | |
855 | } | |
4e87b832 | 856 | |
c5f0f3d0 FN |
857 | return (scan); |
858 | } | |
859 | ||
4e87b832 KD |
860 | /* Skip over the possibly quoted word STR (as defined by the quote |
861 | characters and word break characters used by the completer). | |
9c3f90bd | 862 | Returns pointer to the location after the "word". */ |
4e87b832 KD |
863 | |
864 | char * | |
865 | skip_quoted (char *str) | |
866 | { | |
867 | return skip_quoted_chars (str, NULL, NULL); | |
868 | } |