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de4f826b DC |
1 | /* Routines for name->symbol lookups in GDB. |
2 | ||
42a4f53d | 3 | Copyright (C) 2003-2019 Free Software Foundation, Inc. |
de4f826b DC |
4 | |
5 | Contributed by David Carlton <carlton@bactrian.org> and by Kealia, | |
6 | Inc. | |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
12 | the Free Software Foundation; either version 3 of the License, or |
13 | (at your option) any later version. | |
de4f826b | 14 | |
a9762ec7 JB |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
de4f826b DC |
19 | |
20 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
de4f826b DC |
22 | |
23 | #include "defs.h" | |
c4d840bd | 24 | #include <ctype.h> |
4de283e4 TT |
25 | #include "gdb_obstack.h" |
26 | #include "symtab.h" | |
de4f826b | 27 | #include "buildsym.h" |
de4f826b | 28 | #include "dictionary.h" |
deeeba55 | 29 | #include "safe-ctype.h" |
4de283e4 | 30 | #include <unordered_map> |
0d12e84c | 31 | #include "language.h" |
de4f826b DC |
32 | |
33 | /* This file implements dictionaries, which are tables that associate | |
34 | symbols to names. They are represented by an opaque type 'struct | |
35 | dictionary'. That type has various internal implementations, which | |
36 | you can choose between depending on what properties you need | |
37 | (e.g. fast lookup, order-preserving, expandable). | |
38 | ||
39 | Each dictionary starts with a 'virtual function table' that | |
40 | contains the functions that actually implement the various | |
41 | operations that dictionaries provide. (Note, however, that, for | |
42 | the sake of client code, we also provide some functions that can be | |
43 | implemented generically in terms of the functions in the vtable.) | |
44 | ||
45 | To add a new dictionary implementation <impl>, what you should do | |
46 | is: | |
47 | ||
48 | * Add a new element DICT_<IMPL> to dict_type. | |
49 | ||
50 | * Create a new structure dictionary_<impl>. If your new | |
51 | implementation is a variant of an existing one, make sure that | |
52 | their structs have the same initial data members. Define accessor | |
53 | macros for your new data members. | |
54 | ||
55 | * Implement all the functions in dict_vector as static functions, | |
56 | whose name is the same as the corresponding member of dict_vector | |
57 | plus _<impl>. You don't have to do this for those members where | |
58 | you can reuse existing generic functions | |
59 | (e.g. add_symbol_nonexpandable, free_obstack) or in the case where | |
60 | your new implementation is a variant of an existing implementation | |
61 | and where the variant doesn't affect the member function in | |
62 | question. | |
63 | ||
64 | * Define a static const struct dict_vector dict_<impl>_vector. | |
65 | ||
66 | * Define a function dict_create_<impl> to create these | |
67 | gizmos. Add its declaration to dictionary.h. | |
68 | ||
69 | To add a new operation <op> on all existing implementations, what | |
70 | you should do is: | |
71 | ||
72 | * Add a new member <op> to struct dict_vector. | |
73 | ||
74 | * If there is useful generic behavior <op>, define a static | |
75 | function <op>_something_informative that implements that behavior. | |
76 | (E.g. add_symbol_nonexpandable, free_obstack.) | |
77 | ||
78 | * For every implementation <impl> that should have its own specific | |
79 | behavior for <op>, define a static function <op>_<impl> | |
80 | implementing it. | |
81 | ||
82 | * Modify all existing dict_vector_<impl>'s to include the appropriate | |
83 | member. | |
84 | ||
85 | * Define a function dict_<op> that looks up <op> in the dict_vector | |
86 | and calls the appropriate function. Add a declaration for | |
0963b4bd | 87 | dict_<op> to dictionary.h. */ |
de4f826b DC |
88 | |
89 | /* An enum representing the various implementations of dictionaries. | |
90 | Used only for debugging. */ | |
91 | ||
92 | enum dict_type | |
93 | { | |
94 | /* Symbols are stored in a fixed-size hash table. */ | |
95 | DICT_HASHED, | |
96 | /* Symbols are stored in an expandable hash table. */ | |
97 | DICT_HASHED_EXPANDABLE, | |
98 | /* Symbols are stored in a fixed-size array. */ | |
99 | DICT_LINEAR, | |
100 | /* Symbols are stored in an expandable array. */ | |
20605361 | 101 | DICT_LINEAR_EXPANDABLE |
de4f826b DC |
102 | }; |
103 | ||
104 | /* The virtual function table. */ | |
105 | ||
106 | struct dict_vector | |
107 | { | |
108 | /* The type of the dictionary. This is only here to make debugging | |
109 | a bit easier; it's not actually used. */ | |
110 | enum dict_type type; | |
111 | /* The function to free a dictionary. */ | |
112 | void (*free) (struct dictionary *dict); | |
113 | /* Add a symbol to a dictionary, if possible. */ | |
114 | void (*add_symbol) (struct dictionary *dict, struct symbol *sym); | |
115 | /* Iterator functions. */ | |
116 | struct symbol *(*iterator_first) (const struct dictionary *dict, | |
117 | struct dict_iterator *iterator); | |
118 | struct symbol *(*iterator_next) (struct dict_iterator *iterator); | |
119 | /* Functions to iterate over symbols with a given name. */ | |
c4d840bd | 120 | struct symbol *(*iter_match_first) (const struct dictionary *dict, |
b5ec771e | 121 | const lookup_name_info &name, |
2edb89d3 | 122 | struct dict_iterator *iterator); |
b5ec771e | 123 | struct symbol *(*iter_match_next) (const lookup_name_info &name, |
de4f826b | 124 | struct dict_iterator *iterator); |
de4f826b DC |
125 | /* A size function, for maint print symtabs. */ |
126 | int (*size) (const struct dictionary *dict); | |
127 | }; | |
128 | ||
129 | /* Now comes the structs used to store the data for different | |
130 | implementations. If two implementations have data in common, put | |
131 | the common data at the top of their structs, ordered in the same | |
132 | way. */ | |
133 | ||
134 | struct dictionary_hashed | |
135 | { | |
136 | int nbuckets; | |
137 | struct symbol **buckets; | |
138 | }; | |
139 | ||
140 | struct dictionary_hashed_expandable | |
141 | { | |
142 | /* How many buckets we currently have. */ | |
143 | int nbuckets; | |
144 | struct symbol **buckets; | |
145 | /* How many syms we currently have; we need this so we will know | |
146 | when to add more buckets. */ | |
147 | int nsyms; | |
148 | }; | |
149 | ||
150 | struct dictionary_linear | |
151 | { | |
152 | int nsyms; | |
153 | struct symbol **syms; | |
154 | }; | |
155 | ||
156 | struct dictionary_linear_expandable | |
157 | { | |
158 | /* How many symbols we currently have. */ | |
159 | int nsyms; | |
160 | struct symbol **syms; | |
161 | /* How many symbols we can store before needing to reallocate. */ | |
162 | int capacity; | |
163 | }; | |
164 | ||
165 | /* And now, the star of our show. */ | |
166 | ||
167 | struct dictionary | |
168 | { | |
5ffa0793 | 169 | const struct language_defn *language; |
de4f826b DC |
170 | const struct dict_vector *vector; |
171 | union | |
172 | { | |
173 | struct dictionary_hashed hashed; | |
174 | struct dictionary_hashed_expandable hashed_expandable; | |
175 | struct dictionary_linear linear; | |
176 | struct dictionary_linear_expandable linear_expandable; | |
177 | } | |
178 | data; | |
179 | }; | |
180 | ||
181 | /* Accessor macros. */ | |
182 | ||
183 | #define DICT_VECTOR(d) (d)->vector | |
5ffa0793 | 184 | #define DICT_LANGUAGE(d) (d)->language |
de4f826b DC |
185 | |
186 | /* These can be used for DICT_HASHED_EXPANDABLE, too. */ | |
187 | ||
188 | #define DICT_HASHED_NBUCKETS(d) (d)->data.hashed.nbuckets | |
189 | #define DICT_HASHED_BUCKETS(d) (d)->data.hashed.buckets | |
190 | #define DICT_HASHED_BUCKET(d,i) DICT_HASHED_BUCKETS (d) [i] | |
191 | ||
192 | #define DICT_HASHED_EXPANDABLE_NSYMS(d) (d)->data.hashed_expandable.nsyms | |
193 | ||
194 | /* These can be used for DICT_LINEAR_EXPANDABLEs, too. */ | |
195 | ||
196 | #define DICT_LINEAR_NSYMS(d) (d)->data.linear.nsyms | |
197 | #define DICT_LINEAR_SYMS(d) (d)->data.linear.syms | |
198 | #define DICT_LINEAR_SYM(d,i) DICT_LINEAR_SYMS (d) [i] | |
199 | ||
200 | #define DICT_LINEAR_EXPANDABLE_CAPACITY(d) \ | |
201 | (d)->data.linear_expandable.capacity | |
202 | ||
203 | /* The initial size of a DICT_*_EXPANDABLE dictionary. */ | |
204 | ||
205 | #define DICT_EXPANDABLE_INITIAL_CAPACITY 10 | |
206 | ||
207 | /* This calculates the number of buckets we'll use in a hashtable, | |
208 | given the number of symbols that it will contain. */ | |
209 | ||
210 | #define DICT_HASHTABLE_SIZE(n) ((n)/5 + 1) | |
211 | ||
212 | /* Accessor macros for dict_iterators; they're here rather than | |
213 | dictionary.h because code elsewhere should treat dict_iterators as | |
214 | opaque. */ | |
215 | ||
216 | /* The dictionary that the iterator is associated to. */ | |
217 | #define DICT_ITERATOR_DICT(iter) (iter)->dict | |
218 | /* For linear dictionaries, the index of the last symbol returned; for | |
219 | hashed dictionaries, the bucket of the last symbol returned. */ | |
220 | #define DICT_ITERATOR_INDEX(iter) (iter)->index | |
221 | /* For hashed dictionaries, this points to the last symbol returned; | |
222 | otherwise, this is unused. */ | |
223 | #define DICT_ITERATOR_CURRENT(iter) (iter)->current | |
224 | ||
225 | /* Declarations of functions for vectors. */ | |
226 | ||
227 | /* Functions that might work across a range of dictionary types. */ | |
228 | ||
229 | static void add_symbol_nonexpandable (struct dictionary *dict, | |
230 | struct symbol *sym); | |
231 | ||
232 | static void free_obstack (struct dictionary *dict); | |
233 | ||
234 | /* Functions for DICT_HASHED and DICT_HASHED_EXPANDABLE | |
235 | dictionaries. */ | |
236 | ||
237 | static struct symbol *iterator_first_hashed (const struct dictionary *dict, | |
238 | struct dict_iterator *iterator); | |
239 | ||
240 | static struct symbol *iterator_next_hashed (struct dict_iterator *iterator); | |
241 | ||
c4d840bd | 242 | static struct symbol *iter_match_first_hashed (const struct dictionary *dict, |
b5ec771e | 243 | const lookup_name_info &name, |
de4f826b DC |
244 | struct dict_iterator *iterator); |
245 | ||
b5ec771e | 246 | static struct symbol *iter_match_next_hashed (const lookup_name_info &name, |
c4d840bd PH |
247 | struct dict_iterator *iterator); |
248 | ||
de4f826b DC |
249 | /* Functions only for DICT_HASHED. */ |
250 | ||
251 | static int size_hashed (const struct dictionary *dict); | |
252 | ||
253 | /* Functions only for DICT_HASHED_EXPANDABLE. */ | |
254 | ||
255 | static void free_hashed_expandable (struct dictionary *dict); | |
256 | ||
257 | static void add_symbol_hashed_expandable (struct dictionary *dict, | |
258 | struct symbol *sym); | |
259 | ||
260 | static int size_hashed_expandable (const struct dictionary *dict); | |
261 | ||
262 | /* Functions for DICT_LINEAR and DICT_LINEAR_EXPANDABLE | |
263 | dictionaries. */ | |
264 | ||
265 | static struct symbol *iterator_first_linear (const struct dictionary *dict, | |
266 | struct dict_iterator *iterator); | |
267 | ||
268 | static struct symbol *iterator_next_linear (struct dict_iterator *iterator); | |
269 | ||
c4d840bd | 270 | static struct symbol *iter_match_first_linear (const struct dictionary *dict, |
b5ec771e | 271 | const lookup_name_info &name, |
c4d840bd | 272 | struct dict_iterator *iterator); |
de4f826b | 273 | |
b5ec771e | 274 | static struct symbol *iter_match_next_linear (const lookup_name_info &name, |
c4d840bd | 275 | struct dict_iterator *iterator); |
de4f826b DC |
276 | |
277 | static int size_linear (const struct dictionary *dict); | |
278 | ||
279 | /* Functions only for DICT_LINEAR_EXPANDABLE. */ | |
280 | ||
281 | static void free_linear_expandable (struct dictionary *dict); | |
282 | ||
283 | static void add_symbol_linear_expandable (struct dictionary *dict, | |
284 | struct symbol *sym); | |
285 | ||
286 | /* Various vectors that we'll actually use. */ | |
287 | ||
288 | static const struct dict_vector dict_hashed_vector = | |
289 | { | |
290 | DICT_HASHED, /* type */ | |
291 | free_obstack, /* free */ | |
292 | add_symbol_nonexpandable, /* add_symbol */ | |
a11a1416 | 293 | iterator_first_hashed, /* iterator_first */ |
de4f826b | 294 | iterator_next_hashed, /* iterator_next */ |
c4d840bd PH |
295 | iter_match_first_hashed, /* iter_name_first */ |
296 | iter_match_next_hashed, /* iter_name_next */ | |
de4f826b DC |
297 | size_hashed, /* size */ |
298 | }; | |
299 | ||
300 | static const struct dict_vector dict_hashed_expandable_vector = | |
301 | { | |
302 | DICT_HASHED_EXPANDABLE, /* type */ | |
303 | free_hashed_expandable, /* free */ | |
304 | add_symbol_hashed_expandable, /* add_symbol */ | |
a11a1416 | 305 | iterator_first_hashed, /* iterator_first */ |
de4f826b | 306 | iterator_next_hashed, /* iterator_next */ |
c4d840bd PH |
307 | iter_match_first_hashed, /* iter_name_first */ |
308 | iter_match_next_hashed, /* iter_name_next */ | |
de4f826b DC |
309 | size_hashed_expandable, /* size */ |
310 | }; | |
311 | ||
312 | static const struct dict_vector dict_linear_vector = | |
313 | { | |
314 | DICT_LINEAR, /* type */ | |
315 | free_obstack, /* free */ | |
316 | add_symbol_nonexpandable, /* add_symbol */ | |
a11a1416 | 317 | iterator_first_linear, /* iterator_first */ |
de4f826b | 318 | iterator_next_linear, /* iterator_next */ |
c4d840bd PH |
319 | iter_match_first_linear, /* iter_name_first */ |
320 | iter_match_next_linear, /* iter_name_next */ | |
de4f826b DC |
321 | size_linear, /* size */ |
322 | }; | |
323 | ||
324 | static const struct dict_vector dict_linear_expandable_vector = | |
325 | { | |
326 | DICT_LINEAR_EXPANDABLE, /* type */ | |
327 | free_linear_expandable, /* free */ | |
328 | add_symbol_linear_expandable, /* add_symbol */ | |
a11a1416 | 329 | iterator_first_linear, /* iterator_first */ |
de4f826b | 330 | iterator_next_linear, /* iterator_next */ |
c4d840bd PH |
331 | iter_match_first_linear, /* iter_name_first */ |
332 | iter_match_next_linear, /* iter_name_next */ | |
de4f826b DC |
333 | size_linear, /* size */ |
334 | }; | |
335 | ||
336 | /* Declarations of helper functions (i.e. ones that don't go into | |
337 | vectors). */ | |
338 | ||
339 | static struct symbol *iterator_hashed_advance (struct dict_iterator *iter); | |
340 | ||
341 | static void insert_symbol_hashed (struct dictionary *dict, | |
342 | struct symbol *sym); | |
343 | ||
344 | static void expand_hashtable (struct dictionary *dict); | |
345 | ||
346 | /* The creation functions. */ | |
347 | ||
63a20375 | 348 | /* Create a hashed dictionary of a given language. */ |
de4f826b | 349 | |
c7748ee9 | 350 | static struct dictionary * |
63a20375 KS |
351 | dict_create_hashed (struct obstack *obstack, |
352 | enum language language, | |
353 | const std::vector<symbol *> &symbol_list) | |
de4f826b | 354 | { |
c7748ee9 KS |
355 | /* Allocate the dictionary. */ |
356 | struct dictionary *retval = XOBNEW (obstack, struct dictionary); | |
de4f826b | 357 | DICT_VECTOR (retval) = &dict_hashed_vector; |
5ffa0793 | 358 | DICT_LANGUAGE (retval) = language_def (language); |
de4f826b | 359 | |
c7748ee9 KS |
360 | /* Allocate space for symbols. */ |
361 | int nsyms = symbol_list.size (); | |
362 | int nbuckets = DICT_HASHTABLE_SIZE (nsyms); | |
de4f826b | 363 | DICT_HASHED_NBUCKETS (retval) = nbuckets; |
c7748ee9 | 364 | struct symbol **buckets = XOBNEWVEC (obstack, struct symbol *, nbuckets); |
de4f826b DC |
365 | memset (buckets, 0, nbuckets * sizeof (struct symbol *)); |
366 | DICT_HASHED_BUCKETS (retval) = buckets; | |
367 | ||
368 | /* Now fill the buckets. */ | |
c7748ee9 KS |
369 | for (const auto &sym : symbol_list) |
370 | insert_symbol_hashed (retval, sym); | |
de4f826b DC |
371 | |
372 | return retval; | |
373 | } | |
374 | ||
63a20375 | 375 | /* Create an expandable hashed dictionary of a given language. */ |
c7748ee9 | 376 | |
63a20375 | 377 | static struct dictionary * |
5ffa0793 | 378 | dict_create_hashed_expandable (enum language language) |
de4f826b | 379 | { |
8d749320 | 380 | struct dictionary *retval = XNEW (struct dictionary); |
de4f826b | 381 | |
de4f826b | 382 | DICT_VECTOR (retval) = &dict_hashed_expandable_vector; |
5ffa0793 | 383 | DICT_LANGUAGE (retval) = language_def (language); |
de4f826b | 384 | DICT_HASHED_NBUCKETS (retval) = DICT_EXPANDABLE_INITIAL_CAPACITY; |
224c3ddb SM |
385 | DICT_HASHED_BUCKETS (retval) = XCNEWVEC (struct symbol *, |
386 | DICT_EXPANDABLE_INITIAL_CAPACITY); | |
de4f826b DC |
387 | DICT_HASHED_EXPANDABLE_NSYMS (retval) = 0; |
388 | ||
389 | return retval; | |
390 | } | |
391 | ||
63a20375 | 392 | /* Create a linear dictionary of a given language. */ |
de4f826b | 393 | |
c7748ee9 | 394 | static struct dictionary * |
63a20375 KS |
395 | dict_create_linear (struct obstack *obstack, |
396 | enum language language, | |
397 | const std::vector<symbol *> &symbol_list) | |
de4f826b | 398 | { |
c7748ee9 | 399 | struct dictionary *retval = XOBNEW (obstack, struct dictionary); |
de4f826b | 400 | DICT_VECTOR (retval) = &dict_linear_vector; |
5ffa0793 | 401 | DICT_LANGUAGE (retval) = language_def (language); |
de4f826b | 402 | |
c7748ee9 KS |
403 | /* Allocate space for symbols. */ |
404 | int nsyms = symbol_list.size (); | |
de4f826b | 405 | DICT_LINEAR_NSYMS (retval) = nsyms; |
c7748ee9 | 406 | struct symbol **syms = XOBNEWVEC (obstack, struct symbol *, nsyms); |
de4f826b DC |
407 | DICT_LINEAR_SYMS (retval) = syms; |
408 | ||
c7748ee9 KS |
409 | /* Now fill in the symbols. */ |
410 | int idx = nsyms - 1; | |
411 | for (const auto &sym : symbol_list) | |
412 | syms[idx--] = sym; | |
de4f826b DC |
413 | |
414 | return retval; | |
415 | } | |
416 | ||
63a20375 | 417 | /* Create an expandable linear dictionary of a given language. */ |
c7748ee9 | 418 | |
63a20375 | 419 | static struct dictionary * |
5ffa0793 | 420 | dict_create_linear_expandable (enum language language) |
de4f826b | 421 | { |
8d749320 | 422 | struct dictionary *retval = XNEW (struct dictionary); |
de4f826b | 423 | |
de4f826b | 424 | DICT_VECTOR (retval) = &dict_linear_expandable_vector; |
5ffa0793 | 425 | DICT_LANGUAGE (retval) = language_def (language); |
de4f826b | 426 | DICT_LINEAR_NSYMS (retval) = 0; |
224c3ddb | 427 | DICT_LINEAR_EXPANDABLE_CAPACITY (retval) = DICT_EXPANDABLE_INITIAL_CAPACITY; |
de4f826b | 428 | DICT_LINEAR_SYMS (retval) |
224c3ddb | 429 | = XNEWVEC (struct symbol *, DICT_LINEAR_EXPANDABLE_CAPACITY (retval)); |
de4f826b DC |
430 | |
431 | return retval; | |
432 | } | |
433 | ||
434 | /* The functions providing the dictionary interface. */ | |
435 | ||
436 | /* Free the memory used by a dictionary that's not on an obstack. (If | |
437 | any.) */ | |
438 | ||
63a20375 | 439 | static void |
de4f826b DC |
440 | dict_free (struct dictionary *dict) |
441 | { | |
442 | (DICT_VECTOR (dict))->free (dict); | |
443 | } | |
444 | ||
445 | /* Add SYM to DICT. DICT had better be expandable. */ | |
446 | ||
63a20375 | 447 | static void |
de4f826b DC |
448 | dict_add_symbol (struct dictionary *dict, struct symbol *sym) |
449 | { | |
450 | (DICT_VECTOR (dict))->add_symbol (dict, sym); | |
451 | } | |
452 | ||
63a20375 KS |
453 | /* Utility to add a list of symbols to a dictionary. |
454 | DICT must be an expandable dictionary. */ | |
c7748ee9 KS |
455 | |
456 | static void | |
63a20375 KS |
457 | dict_add_pending (struct dictionary *dict, |
458 | const std::vector<symbol *> &symbol_list) | |
c7748ee9 KS |
459 | { |
460 | /* Preserve ordering by reversing the list. */ | |
461 | for (auto sym = symbol_list.rbegin (); sym != symbol_list.rend (); ++sym) | |
462 | dict_add_symbol (dict, *sym); | |
463 | } | |
464 | ||
de4f826b DC |
465 | /* Initialize ITERATOR to point at the first symbol in DICT, and |
466 | return that first symbol, or NULL if DICT is empty. */ | |
467 | ||
468 | struct symbol * | |
469 | dict_iterator_first (const struct dictionary *dict, | |
470 | struct dict_iterator *iterator) | |
471 | { | |
472 | return (DICT_VECTOR (dict))->iterator_first (dict, iterator); | |
473 | } | |
474 | ||
475 | /* Advance ITERATOR, and return the next symbol, or NULL if there are | |
476 | no more symbols. */ | |
477 | ||
478 | struct symbol * | |
479 | dict_iterator_next (struct dict_iterator *iterator) | |
480 | { | |
481 | return (DICT_VECTOR (DICT_ITERATOR_DICT (iterator))) | |
482 | ->iterator_next (iterator); | |
483 | } | |
484 | ||
c4d840bd PH |
485 | struct symbol * |
486 | dict_iter_match_first (const struct dictionary *dict, | |
b5ec771e | 487 | const lookup_name_info &name, |
c4d840bd PH |
488 | struct dict_iterator *iterator) |
489 | { | |
b5ec771e | 490 | return (DICT_VECTOR (dict))->iter_match_first (dict, name, iterator); |
c4d840bd PH |
491 | } |
492 | ||
493 | struct symbol * | |
b5ec771e | 494 | dict_iter_match_next (const lookup_name_info &name, |
c4d840bd | 495 | struct dict_iterator *iterator) |
de4f826b DC |
496 | { |
497 | return (DICT_VECTOR (DICT_ITERATOR_DICT (iterator))) | |
b5ec771e | 498 | ->iter_match_next (name, iterator); |
de4f826b DC |
499 | } |
500 | ||
63a20375 | 501 | static int |
de4f826b DC |
502 | dict_size (const struct dictionary *dict) |
503 | { | |
504 | return (DICT_VECTOR (dict))->size (dict); | |
505 | } | |
506 | ||
507 | /* Now come functions (well, one function, currently) that are | |
508 | implemented generically by means of the vtable. Typically, they're | |
509 | rarely used. */ | |
510 | ||
511 | /* Test to see if DICT is empty. */ | |
512 | ||
63a20375 | 513 | static int |
de4f826b DC |
514 | dict_empty (struct dictionary *dict) |
515 | { | |
516 | struct dict_iterator iter; | |
517 | ||
518 | return (dict_iterator_first (dict, &iter) == NULL); | |
519 | } | |
520 | ||
521 | ||
522 | /* The functions implementing the dictionary interface. */ | |
523 | ||
524 | /* Generic functions, where appropriate. */ | |
525 | ||
526 | static void | |
527 | free_obstack (struct dictionary *dict) | |
528 | { | |
529 | /* Do nothing! */ | |
530 | } | |
531 | ||
532 | static void | |
533 | add_symbol_nonexpandable (struct dictionary *dict, struct symbol *sym) | |
534 | { | |
535 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 536 | _("dict_add_symbol: non-expandable dictionary")); |
de4f826b DC |
537 | } |
538 | ||
539 | /* Functions for DICT_HASHED and DICT_HASHED_EXPANDABLE. */ | |
540 | ||
541 | static struct symbol * | |
542 | iterator_first_hashed (const struct dictionary *dict, | |
543 | struct dict_iterator *iterator) | |
544 | { | |
545 | DICT_ITERATOR_DICT (iterator) = dict; | |
546 | DICT_ITERATOR_INDEX (iterator) = -1; | |
547 | return iterator_hashed_advance (iterator); | |
548 | } | |
549 | ||
550 | static struct symbol * | |
551 | iterator_next_hashed (struct dict_iterator *iterator) | |
552 | { | |
de4f826b DC |
553 | struct symbol *next; |
554 | ||
555 | next = DICT_ITERATOR_CURRENT (iterator)->hash_next; | |
556 | ||
557 | if (next == NULL) | |
558 | return iterator_hashed_advance (iterator); | |
559 | else | |
560 | { | |
561 | DICT_ITERATOR_CURRENT (iterator) = next; | |
562 | return next; | |
563 | } | |
564 | } | |
565 | ||
566 | static struct symbol * | |
567 | iterator_hashed_advance (struct dict_iterator *iterator) | |
568 | { | |
569 | const struct dictionary *dict = DICT_ITERATOR_DICT (iterator); | |
570 | int nbuckets = DICT_HASHED_NBUCKETS (dict); | |
571 | int i; | |
572 | ||
573 | for (i = DICT_ITERATOR_INDEX (iterator) + 1; i < nbuckets; ++i) | |
574 | { | |
575 | struct symbol *sym = DICT_HASHED_BUCKET (dict, i); | |
576 | ||
577 | if (sym != NULL) | |
578 | { | |
579 | DICT_ITERATOR_INDEX (iterator) = i; | |
580 | DICT_ITERATOR_CURRENT (iterator) = sym; | |
581 | return sym; | |
582 | } | |
583 | } | |
584 | ||
585 | return NULL; | |
586 | } | |
587 | ||
588 | static struct symbol * | |
b5ec771e PA |
589 | iter_match_first_hashed (const struct dictionary *dict, |
590 | const lookup_name_info &name, | |
c4d840bd | 591 | struct dict_iterator *iterator) |
de4f826b | 592 | { |
b5ec771e PA |
593 | const language_defn *lang = DICT_LANGUAGE (dict); |
594 | unsigned int hash_index = (name.search_name_hash (lang->la_language) | |
595 | % DICT_HASHED_NBUCKETS (dict)); | |
596 | symbol_name_matcher_ftype *matches_name | |
618daa93 | 597 | = get_symbol_name_matcher (lang, name); |
de4f826b DC |
598 | struct symbol *sym; |
599 | ||
600 | DICT_ITERATOR_DICT (iterator) = dict; | |
601 | ||
602 | /* Loop through the symbols in the given bucket, breaking when SYM | |
603 | first matches. If SYM never matches, it will be set to NULL; | |
604 | either way, we have the right return value. */ | |
605 | ||
606 | for (sym = DICT_HASHED_BUCKET (dict, hash_index); | |
607 | sym != NULL; | |
608 | sym = sym->hash_next) | |
609 | { | |
c4d840bd | 610 | /* Warning: the order of arguments to compare matters! */ |
b5ec771e PA |
611 | if (matches_name (SYMBOL_SEARCH_NAME (sym), name, NULL)) |
612 | break; | |
de4f826b DC |
613 | } |
614 | ||
615 | DICT_ITERATOR_CURRENT (iterator) = sym; | |
616 | return sym; | |
617 | } | |
618 | ||
619 | static struct symbol * | |
b5ec771e | 620 | iter_match_next_hashed (const lookup_name_info &name, |
c4d840bd | 621 | struct dict_iterator *iterator) |
de4f826b | 622 | { |
b5ec771e PA |
623 | const language_defn *lang = DICT_LANGUAGE (DICT_ITERATOR_DICT (iterator)); |
624 | symbol_name_matcher_ftype *matches_name | |
618daa93 | 625 | = get_symbol_name_matcher (lang, name); |
de4f826b DC |
626 | struct symbol *next; |
627 | ||
628 | for (next = DICT_ITERATOR_CURRENT (iterator)->hash_next; | |
629 | next != NULL; | |
630 | next = next->hash_next) | |
631 | { | |
b5ec771e | 632 | if (matches_name (SYMBOL_SEARCH_NAME (next), name, NULL)) |
de4f826b DC |
633 | break; |
634 | } | |
635 | ||
636 | DICT_ITERATOR_CURRENT (iterator) = next; | |
637 | ||
638 | return next; | |
639 | } | |
640 | ||
641 | /* Insert SYM into DICT. */ | |
642 | ||
643 | static void | |
644 | insert_symbol_hashed (struct dictionary *dict, | |
645 | struct symbol *sym) | |
646 | { | |
647 | unsigned int hash_index; | |
5ffa0793 | 648 | unsigned int hash; |
de4f826b DC |
649 | struct symbol **buckets = DICT_HASHED_BUCKETS (dict); |
650 | ||
5ffa0793 PA |
651 | /* We don't want to insert a symbol into a dictionary of a different |
652 | language. The two may not use the same hashing algorithm. */ | |
653 | gdb_assert (SYMBOL_LANGUAGE (sym) == DICT_LANGUAGE (dict)->la_language); | |
654 | ||
655 | hash = search_name_hash (SYMBOL_LANGUAGE (sym), SYMBOL_SEARCH_NAME (sym)); | |
656 | hash_index = hash % DICT_HASHED_NBUCKETS (dict); | |
de4f826b DC |
657 | sym->hash_next = buckets[hash_index]; |
658 | buckets[hash_index] = sym; | |
659 | } | |
660 | ||
661 | static int | |
662 | size_hashed (const struct dictionary *dict) | |
663 | { | |
664 | return DICT_HASHED_NBUCKETS (dict); | |
665 | } | |
666 | ||
667 | /* Functions only for DICT_HASHED_EXPANDABLE. */ | |
668 | ||
669 | static void | |
670 | free_hashed_expandable (struct dictionary *dict) | |
671 | { | |
672 | xfree (DICT_HASHED_BUCKETS (dict)); | |
673 | xfree (dict); | |
674 | } | |
675 | ||
676 | static void | |
677 | add_symbol_hashed_expandable (struct dictionary *dict, | |
678 | struct symbol *sym) | |
679 | { | |
680 | int nsyms = ++DICT_HASHED_EXPANDABLE_NSYMS (dict); | |
681 | ||
682 | if (DICT_HASHTABLE_SIZE (nsyms) > DICT_HASHED_NBUCKETS (dict)) | |
683 | expand_hashtable (dict); | |
684 | ||
685 | insert_symbol_hashed (dict, sym); | |
686 | DICT_HASHED_EXPANDABLE_NSYMS (dict) = nsyms; | |
687 | } | |
688 | ||
689 | static int | |
690 | size_hashed_expandable (const struct dictionary *dict) | |
691 | { | |
692 | return DICT_HASHED_EXPANDABLE_NSYMS (dict); | |
693 | } | |
694 | ||
695 | static void | |
696 | expand_hashtable (struct dictionary *dict) | |
697 | { | |
698 | int old_nbuckets = DICT_HASHED_NBUCKETS (dict); | |
699 | struct symbol **old_buckets = DICT_HASHED_BUCKETS (dict); | |
224c3ddb SM |
700 | int new_nbuckets = 2 * old_nbuckets + 1; |
701 | struct symbol **new_buckets = XCNEWVEC (struct symbol *, new_nbuckets); | |
de4f826b DC |
702 | int i; |
703 | ||
704 | DICT_HASHED_NBUCKETS (dict) = new_nbuckets; | |
705 | DICT_HASHED_BUCKETS (dict) = new_buckets; | |
706 | ||
6595d32b MS |
707 | for (i = 0; i < old_nbuckets; ++i) |
708 | { | |
709 | struct symbol *sym, *next_sym; | |
710 | ||
711 | sym = old_buckets[i]; | |
712 | if (sym != NULL) | |
713 | { | |
714 | for (next_sym = sym->hash_next; | |
715 | next_sym != NULL; | |
716 | next_sym = sym->hash_next) | |
717 | { | |
718 | insert_symbol_hashed (dict, sym); | |
719 | sym = next_sym; | |
720 | } | |
721 | ||
722 | insert_symbol_hashed (dict, sym); | |
723 | } | |
de4f826b | 724 | } |
de4f826b DC |
725 | |
726 | xfree (old_buckets); | |
727 | } | |
728 | ||
5ffa0793 | 729 | /* See dictionary.h. */ |
c4d840bd | 730 | |
5ffa0793 PA |
731 | unsigned int |
732 | default_search_name_hash (const char *string0) | |
c4d840bd PH |
733 | { |
734 | /* The Ada-encoded version of a name P1.P2...Pn has either the form | |
735 | P1__P2__...Pn<suffix> or _ada_P1__P2__...Pn<suffix> (where the Pi | |
736 | are lower-cased identifiers). The <suffix> (which can be empty) | |
737 | encodes additional information about the denoted entity. This | |
738 | routine hashes such names to msymbol_hash_iw(Pn). It actually | |
739 | does this for a superset of both valid Pi and of <suffix>, but | |
740 | in other cases it simply returns msymbol_hash_iw(STRING0). */ | |
741 | ||
1d2a4540 | 742 | const char *string; |
c4d840bd | 743 | unsigned int hash; |
c4d840bd | 744 | |
1d2a4540 PH |
745 | string = string0; |
746 | if (*string == '_') | |
747 | { | |
61012eef | 748 | if (startswith (string, "_ada_")) |
1d2a4540 PH |
749 | string += 5; |
750 | else | |
751 | return msymbol_hash_iw (string0); | |
752 | } | |
c4d840bd PH |
753 | |
754 | hash = 0; | |
755 | while (*string) | |
756 | { | |
757 | switch (*string) | |
758 | { | |
759 | case '$': | |
760 | case '.': | |
761 | case 'X': | |
1d2a4540 PH |
762 | if (string0 == string) |
763 | return msymbol_hash_iw (string0); | |
764 | else | |
765 | return hash; | |
c4d840bd | 766 | case ' ': |
1d2a4540 PH |
767 | case '(': |
768 | return msymbol_hash_iw (string0); | |
c4d840bd | 769 | case '_': |
1d2a4540 | 770 | if (string[1] == '_' && string != string0) |
c4d840bd | 771 | { |
558b1900 JB |
772 | int c = string[2]; |
773 | ||
774 | if ((c < 'a' || c > 'z') && c != 'O') | |
c4d840bd PH |
775 | return hash; |
776 | hash = 0; | |
777 | string += 2; | |
7e8835c5 | 778 | continue; |
c4d840bd | 779 | } |
7e8835c5 TT |
780 | break; |
781 | case 'T': | |
782 | /* Ignore "TKB" suffixes. | |
783 | ||
784 | These are used by Ada for subprograms implementing a task body. | |
785 | For instance for a task T inside package Pck, the name of the | |
786 | subprogram implementing T's body is `pck__tTKB'. We need to | |
787 | ignore the "TKB" suffix because searches for this task body | |
788 | subprogram are going to be performed using `pck__t' (the encoded | |
789 | version of the natural name `pck.t'). */ | |
790 | if (strcmp (string, "TKB") == 0) | |
791 | return hash; | |
c4d840bd PH |
792 | break; |
793 | } | |
7e8835c5 TT |
794 | |
795 | hash = SYMBOL_HASH_NEXT (hash, *string); | |
796 | string += 1; | |
c4d840bd PH |
797 | } |
798 | return hash; | |
799 | } | |
800 | ||
de4f826b DC |
801 | /* Functions for DICT_LINEAR and DICT_LINEAR_EXPANDABLE. */ |
802 | ||
803 | static struct symbol * | |
804 | iterator_first_linear (const struct dictionary *dict, | |
805 | struct dict_iterator *iterator) | |
806 | { | |
807 | DICT_ITERATOR_DICT (iterator) = dict; | |
808 | DICT_ITERATOR_INDEX (iterator) = 0; | |
809 | return DICT_LINEAR_NSYMS (dict) ? DICT_LINEAR_SYM (dict, 0) : NULL; | |
810 | } | |
811 | ||
812 | static struct symbol * | |
813 | iterator_next_linear (struct dict_iterator *iterator) | |
814 | { | |
815 | const struct dictionary *dict = DICT_ITERATOR_DICT (iterator); | |
816 | ||
817 | if (++DICT_ITERATOR_INDEX (iterator) >= DICT_LINEAR_NSYMS (dict)) | |
818 | return NULL; | |
819 | else | |
820 | return DICT_LINEAR_SYM (dict, DICT_ITERATOR_INDEX (iterator)); | |
821 | } | |
822 | ||
823 | static struct symbol * | |
c4d840bd | 824 | iter_match_first_linear (const struct dictionary *dict, |
b5ec771e | 825 | const lookup_name_info &name, |
c4d840bd | 826 | struct dict_iterator *iterator) |
de4f826b DC |
827 | { |
828 | DICT_ITERATOR_DICT (iterator) = dict; | |
829 | DICT_ITERATOR_INDEX (iterator) = -1; | |
830 | ||
b5ec771e | 831 | return iter_match_next_linear (name, iterator); |
de4f826b DC |
832 | } |
833 | ||
834 | static struct symbol * | |
b5ec771e | 835 | iter_match_next_linear (const lookup_name_info &name, |
c4d840bd | 836 | struct dict_iterator *iterator) |
de4f826b DC |
837 | { |
838 | const struct dictionary *dict = DICT_ITERATOR_DICT (iterator); | |
b5ec771e PA |
839 | const language_defn *lang = DICT_LANGUAGE (dict); |
840 | symbol_name_matcher_ftype *matches_name | |
618daa93 | 841 | = get_symbol_name_matcher (lang, name); |
b5ec771e | 842 | |
de4f826b DC |
843 | int i, nsyms = DICT_LINEAR_NSYMS (dict); |
844 | struct symbol *sym, *retval = NULL; | |
845 | ||
846 | for (i = DICT_ITERATOR_INDEX (iterator) + 1; i < nsyms; ++i) | |
847 | { | |
848 | sym = DICT_LINEAR_SYM (dict, i); | |
b5ec771e PA |
849 | |
850 | if (matches_name (SYMBOL_SEARCH_NAME (sym), name, NULL)) | |
de4f826b DC |
851 | { |
852 | retval = sym; | |
853 | break; | |
854 | } | |
855 | } | |
856 | ||
857 | DICT_ITERATOR_INDEX (iterator) = i; | |
858 | ||
859 | return retval; | |
860 | } | |
861 | ||
862 | static int | |
863 | size_linear (const struct dictionary *dict) | |
864 | { | |
865 | return DICT_LINEAR_NSYMS (dict); | |
866 | } | |
867 | ||
868 | /* Functions only for DICT_LINEAR_EXPANDABLE. */ | |
869 | ||
870 | static void | |
871 | free_linear_expandable (struct dictionary *dict) | |
872 | { | |
873 | xfree (DICT_LINEAR_SYMS (dict)); | |
874 | xfree (dict); | |
875 | } | |
876 | ||
877 | ||
878 | static void | |
879 | add_symbol_linear_expandable (struct dictionary *dict, | |
880 | struct symbol *sym) | |
881 | { | |
882 | int nsyms = ++DICT_LINEAR_NSYMS (dict); | |
883 | ||
884 | /* Do we have enough room? If not, grow it. */ | |
6595d32b MS |
885 | if (nsyms > DICT_LINEAR_EXPANDABLE_CAPACITY (dict)) |
886 | { | |
887 | DICT_LINEAR_EXPANDABLE_CAPACITY (dict) *= 2; | |
888 | DICT_LINEAR_SYMS (dict) | |
224c3ddb SM |
889 | = XRESIZEVEC (struct symbol *, DICT_LINEAR_SYMS (dict), |
890 | DICT_LINEAR_EXPANDABLE_CAPACITY (dict)); | |
6595d32b | 891 | } |
de4f826b DC |
892 | |
893 | DICT_LINEAR_SYM (dict, nsyms - 1) = sym; | |
894 | } | |
c7748ee9 KS |
895 | |
896 | /* Multi-language dictionary support. */ | |
897 | ||
898 | /* The structure describing a multi-language dictionary. */ | |
899 | ||
900 | struct multidictionary | |
901 | { | |
902 | /* An array of dictionaries, one per language. All dictionaries | |
903 | must be of the same type. This should be free'd for expandable | |
904 | dictionary types. */ | |
905 | struct dictionary **dictionaries; | |
906 | ||
907 | /* The number of language dictionaries currently allocated. | |
908 | Only used for expandable dictionaries. */ | |
909 | unsigned short n_allocated_dictionaries; | |
910 | }; | |
911 | ||
912 | /* A hasher for enum language. Injecting this into std is a convenience | |
913 | when using unordered_map with C++11. */ | |
914 | ||
915 | namespace std | |
916 | { | |
917 | template<> struct hash<enum language> | |
918 | { | |
919 | typedef enum language argument_type; | |
920 | typedef std::size_t result_type; | |
921 | ||
922 | result_type operator() (const argument_type &l) const noexcept | |
923 | { | |
924 | return static_cast<result_type> (l); | |
925 | } | |
926 | }; | |
927 | } /* namespace std */ | |
928 | ||
929 | /* A helper function to collate symbols on the pending list by language. */ | |
930 | ||
931 | static std::unordered_map<enum language, std::vector<symbol *>> | |
932 | collate_pending_symbols_by_language (const struct pending *symbol_list) | |
933 | { | |
934 | std::unordered_map<enum language, std::vector<symbol *>> nsyms; | |
935 | ||
bde09ab7 | 936 | for (const pending *list_counter = symbol_list; |
c7748ee9 KS |
937 | list_counter != nullptr; list_counter = list_counter->next) |
938 | { | |
939 | for (int i = list_counter->nsyms - 1; i >= 0; --i) | |
940 | { | |
941 | enum language language = SYMBOL_LANGUAGE (list_counter->symbol[i]); | |
942 | nsyms[language].push_back (list_counter->symbol[i]); | |
943 | } | |
944 | } | |
945 | ||
946 | return nsyms; | |
947 | } | |
948 | ||
949 | /* See dictionary.h. */ | |
950 | ||
951 | struct multidictionary * | |
952 | mdict_create_hashed (struct obstack *obstack, | |
953 | const struct pending *symbol_list) | |
954 | { | |
955 | struct multidictionary *retval | |
956 | = XOBNEW (obstack, struct multidictionary); | |
957 | std::unordered_map<enum language, std::vector<symbol *>> nsyms | |
958 | = collate_pending_symbols_by_language (symbol_list); | |
959 | ||
960 | /* Loop over all languages and create/populate dictionaries. */ | |
961 | retval->dictionaries | |
962 | = XOBNEWVEC (obstack, struct dictionary *, nsyms.size ()); | |
963 | retval->n_allocated_dictionaries = nsyms.size (); | |
964 | ||
965 | int idx = 0; | |
966 | for (const auto &pair : nsyms) | |
967 | { | |
968 | enum language language = pair.first; | |
969 | std::vector<symbol *> symlist = pair.second; | |
970 | ||
971 | retval->dictionaries[idx++] | |
63a20375 | 972 | = dict_create_hashed (obstack, language, symlist); |
c7748ee9 KS |
973 | } |
974 | ||
975 | return retval; | |
976 | } | |
977 | ||
978 | /* See dictionary.h. */ | |
979 | ||
980 | struct multidictionary * | |
981 | mdict_create_hashed_expandable (enum language language) | |
982 | { | |
983 | struct multidictionary *retval = XNEW (struct multidictionary); | |
984 | ||
985 | /* We have no symbol list to populate, but we create an empty | |
986 | dictionary of the requested language to populate later. */ | |
987 | retval->n_allocated_dictionaries = 1; | |
988 | retval->dictionaries = XNEW (struct dictionary *); | |
989 | retval->dictionaries[0] = dict_create_hashed_expandable (language); | |
990 | ||
991 | return retval; | |
992 | } | |
993 | ||
994 | /* See dictionary.h. */ | |
995 | ||
996 | struct multidictionary * | |
997 | mdict_create_linear (struct obstack *obstack, | |
998 | const struct pending *symbol_list) | |
999 | { | |
1000 | struct multidictionary *retval | |
1001 | = XOBNEW (obstack, struct multidictionary); | |
1002 | std::unordered_map<enum language, std::vector<symbol *>> nsyms | |
1003 | = collate_pending_symbols_by_language (symbol_list); | |
1004 | ||
1005 | /* Loop over all languages and create/populate dictionaries. */ | |
1006 | retval->dictionaries | |
1007 | = XOBNEWVEC (obstack, struct dictionary *, nsyms.size ()); | |
1008 | retval->n_allocated_dictionaries = nsyms.size (); | |
1009 | ||
1010 | int idx = 0; | |
1011 | for (const auto &pair : nsyms) | |
1012 | { | |
1013 | enum language language = pair.first; | |
1014 | std::vector<symbol *> symlist = pair.second; | |
1015 | ||
1016 | retval->dictionaries[idx++] | |
63a20375 | 1017 | = dict_create_linear (obstack, language, symlist); |
c7748ee9 KS |
1018 | } |
1019 | ||
1020 | return retval; | |
1021 | } | |
1022 | ||
1023 | /* See dictionary.h. */ | |
1024 | ||
1025 | struct multidictionary * | |
1026 | mdict_create_linear_expandable (enum language language) | |
1027 | { | |
1028 | struct multidictionary *retval = XNEW (struct multidictionary); | |
1029 | ||
1030 | /* We have no symbol list to populate, but we create an empty | |
1031 | dictionary to populate later. */ | |
1032 | retval->n_allocated_dictionaries = 1; | |
1033 | retval->dictionaries = XNEW (struct dictionary *); | |
1034 | retval->dictionaries[0] = dict_create_linear_expandable (language); | |
1035 | ||
1036 | return retval; | |
1037 | } | |
1038 | ||
1039 | /* See dictionary.h. */ | |
1040 | ||
1041 | void | |
1042 | mdict_free (struct multidictionary *mdict) | |
1043 | { | |
1044 | /* Grab the type of dictionary being used. */ | |
1045 | enum dict_type type = mdict->dictionaries[0]->vector->type; | |
1046 | ||
1047 | /* Loop over all dictionaries and free them. */ | |
1048 | for (unsigned short idx = 0; idx < mdict->n_allocated_dictionaries; ++idx) | |
1049 | dict_free (mdict->dictionaries[idx]); | |
1050 | ||
1051 | /* Free the dictionary list, if needed. */ | |
1052 | switch (type) | |
1053 | { | |
1054 | case DICT_HASHED: | |
1055 | case DICT_LINEAR: | |
1056 | /* Memory was allocated on an obstack when created. */ | |
1057 | break; | |
1058 | ||
1059 | case DICT_HASHED_EXPANDABLE: | |
1060 | case DICT_LINEAR_EXPANDABLE: | |
1061 | xfree (mdict->dictionaries); | |
1062 | break; | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | /* Helper function to find the dictionary associated with LANGUAGE | |
1067 | or NULL if there is no dictionary of that language. */ | |
1068 | ||
1069 | static struct dictionary * | |
1070 | find_language_dictionary (const struct multidictionary *mdict, | |
1071 | enum language language) | |
1072 | { | |
1073 | for (unsigned short idx = 0; idx < mdict->n_allocated_dictionaries; ++idx) | |
1074 | { | |
1075 | if (DICT_LANGUAGE (mdict->dictionaries[idx])->la_language == language) | |
1076 | return mdict->dictionaries[idx]; | |
1077 | } | |
1078 | ||
1079 | return nullptr; | |
1080 | } | |
1081 | ||
1082 | /* Create a new language dictionary for LANGUAGE and add it to the | |
1083 | multidictionary MDICT's list of dictionaries. If MDICT is not | |
1084 | based on expandable dictionaries, this function throws an | |
1085 | internal error. */ | |
1086 | ||
1087 | static struct dictionary * | |
1088 | create_new_language_dictionary (struct multidictionary *mdict, | |
1089 | enum language language) | |
1090 | { | |
1091 | struct dictionary *retval = nullptr; | |
1092 | ||
1093 | /* We use the first dictionary entry to decide what create function | |
1094 | to call. Not optimal but sufficient. */ | |
1095 | gdb_assert (mdict->dictionaries[0] != nullptr); | |
1096 | switch (mdict->dictionaries[0]->vector->type) | |
1097 | { | |
1098 | case DICT_HASHED: | |
1099 | case DICT_LINEAR: | |
1100 | internal_error (__FILE__, __LINE__, | |
1101 | _("create_new_language_dictionary: attempted to expand " | |
1102 | "non-expandable multidictionary")); | |
1103 | ||
1104 | case DICT_HASHED_EXPANDABLE: | |
1105 | retval = dict_create_hashed_expandable (language); | |
1106 | break; | |
1107 | ||
1108 | case DICT_LINEAR_EXPANDABLE: | |
1109 | retval = dict_create_linear_expandable (language); | |
1110 | break; | |
1111 | } | |
1112 | ||
1113 | /* Grow the dictionary vector and save the new dictionary. */ | |
1114 | mdict->dictionaries | |
1115 | = (struct dictionary **) xrealloc (mdict->dictionaries, | |
1116 | (++mdict->n_allocated_dictionaries | |
1117 | * sizeof (struct dictionary *))); | |
1118 | mdict->dictionaries[mdict->n_allocated_dictionaries - 1] = retval; | |
1119 | ||
1120 | return retval; | |
1121 | } | |
1122 | ||
1123 | /* See dictionary.h. */ | |
1124 | ||
1125 | void | |
1126 | mdict_add_symbol (struct multidictionary *mdict, struct symbol *sym) | |
1127 | { | |
1128 | struct dictionary *dict | |
1129 | = find_language_dictionary (mdict, SYMBOL_LANGUAGE (sym)); | |
1130 | ||
1131 | if (dict == nullptr) | |
1132 | { | |
1133 | /* SYM is of a new language that we haven't previously seen. | |
1134 | Create a new dictionary for it. */ | |
1135 | dict = create_new_language_dictionary (mdict, SYMBOL_LANGUAGE (sym)); | |
1136 | } | |
1137 | ||
1138 | dict_add_symbol (dict, sym); | |
1139 | } | |
1140 | ||
1141 | /* See dictionary.h. */ | |
1142 | ||
1143 | void | |
1144 | mdict_add_pending (struct multidictionary *mdict, | |
1145 | const struct pending *symbol_list) | |
1146 | { | |
1147 | std::unordered_map<enum language, std::vector<symbol *>> nsyms | |
1148 | = collate_pending_symbols_by_language (symbol_list); | |
1149 | ||
1150 | for (const auto &pair : nsyms) | |
1151 | { | |
1152 | enum language language = pair.first; | |
1153 | std::vector<symbol *> symlist = pair.second; | |
1154 | struct dictionary *dict = find_language_dictionary (mdict, language); | |
1155 | ||
1156 | if (dict == nullptr) | |
1157 | { | |
1158 | /* The language was not previously seen. Create a new dictionary | |
1159 | for it. */ | |
1160 | dict = create_new_language_dictionary (mdict, language); | |
1161 | } | |
1162 | ||
63a20375 | 1163 | dict_add_pending (dict, symlist); |
c7748ee9 KS |
1164 | } |
1165 | } | |
1166 | ||
1167 | /* See dictionary.h. */ | |
1168 | ||
1169 | struct symbol * | |
1170 | mdict_iterator_first (const multidictionary *mdict, | |
1171 | struct mdict_iterator *miterator) | |
1172 | { | |
1173 | miterator->mdict = mdict; | |
1174 | miterator->current_idx = 0; | |
1175 | ||
1176 | for (unsigned short idx = miterator->current_idx; | |
1177 | idx < mdict->n_allocated_dictionaries; ++idx) | |
1178 | { | |
1179 | struct symbol *result | |
1180 | = dict_iterator_first (mdict->dictionaries[idx], &miterator->iterator); | |
1181 | ||
1182 | if (result != nullptr) | |
1183 | { | |
1184 | miterator->current_idx = idx; | |
1185 | return result; | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | return nullptr; | |
1190 | } | |
1191 | ||
1192 | /* See dictionary.h. */ | |
1193 | ||
1194 | struct symbol * | |
1195 | mdict_iterator_next (struct mdict_iterator *miterator) | |
1196 | { | |
1197 | struct symbol *result = dict_iterator_next (&miterator->iterator); | |
1198 | ||
1199 | if (result != nullptr) | |
1200 | return result; | |
1201 | ||
1202 | /* The current dictionary had no matches -- move to the next | |
1203 | dictionary, if any. */ | |
1204 | for (unsigned short idx = ++miterator->current_idx; | |
1205 | idx < miterator->mdict->n_allocated_dictionaries; ++idx) | |
1206 | { | |
1207 | result | |
1208 | = dict_iterator_first (miterator->mdict->dictionaries[idx], | |
1209 | &miterator->iterator); | |
1210 | if (result != nullptr) | |
1211 | { | |
1212 | miterator->current_idx = idx; | |
1213 | return result; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | return nullptr; | |
1218 | } | |
1219 | ||
1220 | /* See dictionary.h. */ | |
1221 | ||
1222 | struct symbol * | |
1223 | mdict_iter_match_first (const struct multidictionary *mdict, | |
1224 | const lookup_name_info &name, | |
1225 | struct mdict_iterator *miterator) | |
1226 | { | |
1227 | miterator->mdict = mdict; | |
1228 | miterator->current_idx = 0; | |
1229 | ||
1230 | for (unsigned short idx = miterator->current_idx; | |
1231 | idx < mdict->n_allocated_dictionaries; ++idx) | |
1232 | { | |
1233 | struct symbol *result | |
1234 | = dict_iter_match_first (mdict->dictionaries[idx], name, | |
1235 | &miterator->iterator); | |
1236 | ||
1237 | if (result != nullptr) | |
1238 | return result; | |
1239 | } | |
1240 | ||
1241 | return nullptr; | |
1242 | } | |
1243 | ||
1244 | /* See dictionary.h. */ | |
1245 | ||
1246 | struct symbol * | |
1247 | mdict_iter_match_next (const lookup_name_info &name, | |
1248 | struct mdict_iterator *miterator) | |
1249 | { | |
1250 | /* Search the current dictionary. */ | |
1251 | struct symbol *result = dict_iter_match_next (name, &miterator->iterator); | |
1252 | ||
1253 | if (result != nullptr) | |
1254 | return result; | |
1255 | ||
1256 | /* The current dictionary had no matches -- move to the next | |
1257 | dictionary, if any. */ | |
1258 | for (unsigned short idx = ++miterator->current_idx; | |
1259 | idx < miterator->mdict->n_allocated_dictionaries; ++idx) | |
1260 | { | |
1261 | result | |
1262 | = dict_iter_match_first (miterator->mdict->dictionaries[idx], | |
1263 | name, &miterator->iterator); | |
1264 | if (result != nullptr) | |
1265 | { | |
1266 | miterator->current_idx = idx; | |
1267 | return result; | |
1268 | } | |
1269 | } | |
1270 | ||
1271 | return nullptr; | |
1272 | } | |
1273 | ||
1274 | /* See dictionary.h. */ | |
1275 | ||
1276 | int | |
1277 | mdict_size (const struct multidictionary *mdict) | |
1278 | { | |
1279 | int size = 0; | |
1280 | ||
1281 | for (unsigned short idx = 0; idx < mdict->n_allocated_dictionaries; ++idx) | |
1282 | size += dict_size (mdict->dictionaries[idx]); | |
1283 | ||
1284 | return size; | |
1285 | } | |
1286 | ||
1287 | /* See dictionary.h. */ | |
1288 | ||
1289 | bool | |
1290 | mdict_empty (const struct multidictionary *mdict) | |
1291 | { | |
1292 | for (unsigned short idx = 0; idx < mdict->n_allocated_dictionaries; ++idx) | |
1293 | { | |
1294 | if (!dict_empty (mdict->dictionaries[idx])) | |
1295 | return false; | |
1296 | } | |
1297 | ||
1298 | return true; | |
1299 | } |