| 1 | /* Routines for name->symbol lookups in GDB. |
| 2 | |
| 3 | Copyright (C) 2003-2019 Free Software Foundation, Inc. |
| 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 |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 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. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include <ctype.h> |
| 25 | #include "gdb_obstack.h" |
| 26 | #include "symtab.h" |
| 27 | #include "buildsym.h" |
| 28 | #include "dictionary.h" |
| 29 | #include "safe-ctype.h" |
| 30 | #include <unordered_map> |
| 31 | #include "language.h" |
| 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 |
| 87 | dict_<op> to dictionary.h. */ |
| 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. */ |
| 101 | DICT_LINEAR_EXPANDABLE |
| 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. */ |
| 120 | struct symbol *(*iter_match_first) (const struct dictionary *dict, |
| 121 | const lookup_name_info &name, |
| 122 | struct dict_iterator *iterator); |
| 123 | struct symbol *(*iter_match_next) (const lookup_name_info &name, |
| 124 | struct dict_iterator *iterator); |
| 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 | { |
| 169 | const struct language_defn *language; |
| 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 |
| 184 | #define DICT_LANGUAGE(d) (d)->language |
| 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 | |
| 242 | static struct symbol *iter_match_first_hashed (const struct dictionary *dict, |
| 243 | const lookup_name_info &name, |
| 244 | struct dict_iterator *iterator); |
| 245 | |
| 246 | static struct symbol *iter_match_next_hashed (const lookup_name_info &name, |
| 247 | struct dict_iterator *iterator); |
| 248 | |
| 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 | |
| 270 | static struct symbol *iter_match_first_linear (const struct dictionary *dict, |
| 271 | const lookup_name_info &name, |
| 272 | struct dict_iterator *iterator); |
| 273 | |
| 274 | static struct symbol *iter_match_next_linear (const lookup_name_info &name, |
| 275 | struct dict_iterator *iterator); |
| 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 */ |
| 293 | iterator_first_hashed, /* iterator_first */ |
| 294 | iterator_next_hashed, /* iterator_next */ |
| 295 | iter_match_first_hashed, /* iter_name_first */ |
| 296 | iter_match_next_hashed, /* iter_name_next */ |
| 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 */ |
| 305 | iterator_first_hashed, /* iterator_first */ |
| 306 | iterator_next_hashed, /* iterator_next */ |
| 307 | iter_match_first_hashed, /* iter_name_first */ |
| 308 | iter_match_next_hashed, /* iter_name_next */ |
| 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 */ |
| 317 | iterator_first_linear, /* iterator_first */ |
| 318 | iterator_next_linear, /* iterator_next */ |
| 319 | iter_match_first_linear, /* iter_name_first */ |
| 320 | iter_match_next_linear, /* iter_name_next */ |
| 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 */ |
| 329 | iterator_first_linear, /* iterator_first */ |
| 330 | iterator_next_linear, /* iterator_next */ |
| 331 | iter_match_first_linear, /* iter_name_first */ |
| 332 | iter_match_next_linear, /* iter_name_next */ |
| 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 | |
| 348 | /* Create a hashed dictionary of a given language. */ |
| 349 | |
| 350 | static struct dictionary * |
| 351 | dict_create_hashed (struct obstack *obstack, |
| 352 | enum language language, |
| 353 | const std::vector<symbol *> &symbol_list) |
| 354 | { |
| 355 | /* Allocate the dictionary. */ |
| 356 | struct dictionary *retval = XOBNEW (obstack, struct dictionary); |
| 357 | DICT_VECTOR (retval) = &dict_hashed_vector; |
| 358 | DICT_LANGUAGE (retval) = language_def (language); |
| 359 | |
| 360 | /* Allocate space for symbols. */ |
| 361 | int nsyms = symbol_list.size (); |
| 362 | int nbuckets = DICT_HASHTABLE_SIZE (nsyms); |
| 363 | DICT_HASHED_NBUCKETS (retval) = nbuckets; |
| 364 | struct symbol **buckets = XOBNEWVEC (obstack, struct symbol *, nbuckets); |
| 365 | memset (buckets, 0, nbuckets * sizeof (struct symbol *)); |
| 366 | DICT_HASHED_BUCKETS (retval) = buckets; |
| 367 | |
| 368 | /* Now fill the buckets. */ |
| 369 | for (const auto &sym : symbol_list) |
| 370 | insert_symbol_hashed (retval, sym); |
| 371 | |
| 372 | return retval; |
| 373 | } |
| 374 | |
| 375 | /* Create an expandable hashed dictionary of a given language. */ |
| 376 | |
| 377 | static struct dictionary * |
| 378 | dict_create_hashed_expandable (enum language language) |
| 379 | { |
| 380 | struct dictionary *retval = XNEW (struct dictionary); |
| 381 | |
| 382 | DICT_VECTOR (retval) = &dict_hashed_expandable_vector; |
| 383 | DICT_LANGUAGE (retval) = language_def (language); |
| 384 | DICT_HASHED_NBUCKETS (retval) = DICT_EXPANDABLE_INITIAL_CAPACITY; |
| 385 | DICT_HASHED_BUCKETS (retval) = XCNEWVEC (struct symbol *, |
| 386 | DICT_EXPANDABLE_INITIAL_CAPACITY); |
| 387 | DICT_HASHED_EXPANDABLE_NSYMS (retval) = 0; |
| 388 | |
| 389 | return retval; |
| 390 | } |
| 391 | |
| 392 | /* Create a linear dictionary of a given language. */ |
| 393 | |
| 394 | static struct dictionary * |
| 395 | dict_create_linear (struct obstack *obstack, |
| 396 | enum language language, |
| 397 | const std::vector<symbol *> &symbol_list) |
| 398 | { |
| 399 | struct dictionary *retval = XOBNEW (obstack, struct dictionary); |
| 400 | DICT_VECTOR (retval) = &dict_linear_vector; |
| 401 | DICT_LANGUAGE (retval) = language_def (language); |
| 402 | |
| 403 | /* Allocate space for symbols. */ |
| 404 | int nsyms = symbol_list.size (); |
| 405 | DICT_LINEAR_NSYMS (retval) = nsyms; |
| 406 | struct symbol **syms = XOBNEWVEC (obstack, struct symbol *, nsyms); |
| 407 | DICT_LINEAR_SYMS (retval) = syms; |
| 408 | |
| 409 | /* Now fill in the symbols. */ |
| 410 | int idx = nsyms - 1; |
| 411 | for (const auto &sym : symbol_list) |
| 412 | syms[idx--] = sym; |
| 413 | |
| 414 | return retval; |
| 415 | } |
| 416 | |
| 417 | /* Create an expandable linear dictionary of a given language. */ |
| 418 | |
| 419 | static struct dictionary * |
| 420 | dict_create_linear_expandable (enum language language) |
| 421 | { |
| 422 | struct dictionary *retval = XNEW (struct dictionary); |
| 423 | |
| 424 | DICT_VECTOR (retval) = &dict_linear_expandable_vector; |
| 425 | DICT_LANGUAGE (retval) = language_def (language); |
| 426 | DICT_LINEAR_NSYMS (retval) = 0; |
| 427 | DICT_LINEAR_EXPANDABLE_CAPACITY (retval) = DICT_EXPANDABLE_INITIAL_CAPACITY; |
| 428 | DICT_LINEAR_SYMS (retval) |
| 429 | = XNEWVEC (struct symbol *, DICT_LINEAR_EXPANDABLE_CAPACITY (retval)); |
| 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 | |
| 439 | static void |
| 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 | |
| 447 | static void |
| 448 | dict_add_symbol (struct dictionary *dict, struct symbol *sym) |
| 449 | { |
| 450 | (DICT_VECTOR (dict))->add_symbol (dict, sym); |
| 451 | } |
| 452 | |
| 453 | /* Utility to add a list of symbols to a dictionary. |
| 454 | DICT must be an expandable dictionary. */ |
| 455 | |
| 456 | static void |
| 457 | dict_add_pending (struct dictionary *dict, |
| 458 | const std::vector<symbol *> &symbol_list) |
| 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 | |
| 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 | |
| 485 | struct symbol * |
| 486 | dict_iter_match_first (const struct dictionary *dict, |
| 487 | const lookup_name_info &name, |
| 488 | struct dict_iterator *iterator) |
| 489 | { |
| 490 | return (DICT_VECTOR (dict))->iter_match_first (dict, name, iterator); |
| 491 | } |
| 492 | |
| 493 | struct symbol * |
| 494 | dict_iter_match_next (const lookup_name_info &name, |
| 495 | struct dict_iterator *iterator) |
| 496 | { |
| 497 | return (DICT_VECTOR (DICT_ITERATOR_DICT (iterator))) |
| 498 | ->iter_match_next (name, iterator); |
| 499 | } |
| 500 | |
| 501 | static int |
| 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 | |
| 513 | static int |
| 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__, |
| 536 | _("dict_add_symbol: non-expandable dictionary")); |
| 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 | { |
| 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 * |
| 589 | iter_match_first_hashed (const struct dictionary *dict, |
| 590 | const lookup_name_info &name, |
| 591 | struct dict_iterator *iterator) |
| 592 | { |
| 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 |
| 597 | = get_symbol_name_matcher (lang, name); |
| 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 | { |
| 610 | /* Warning: the order of arguments to compare matters! */ |
| 611 | if (matches_name (SYMBOL_SEARCH_NAME (sym), name, NULL)) |
| 612 | break; |
| 613 | } |
| 614 | |
| 615 | DICT_ITERATOR_CURRENT (iterator) = sym; |
| 616 | return sym; |
| 617 | } |
| 618 | |
| 619 | static struct symbol * |
| 620 | iter_match_next_hashed (const lookup_name_info &name, |
| 621 | struct dict_iterator *iterator) |
| 622 | { |
| 623 | const language_defn *lang = DICT_LANGUAGE (DICT_ITERATOR_DICT (iterator)); |
| 624 | symbol_name_matcher_ftype *matches_name |
| 625 | = get_symbol_name_matcher (lang, name); |
| 626 | struct symbol *next; |
| 627 | |
| 628 | for (next = DICT_ITERATOR_CURRENT (iterator)->hash_next; |
| 629 | next != NULL; |
| 630 | next = next->hash_next) |
| 631 | { |
| 632 | if (matches_name (SYMBOL_SEARCH_NAME (next), name, NULL)) |
| 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; |
| 648 | unsigned int hash; |
| 649 | struct symbol **buckets = DICT_HASHED_BUCKETS (dict); |
| 650 | |
| 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); |
| 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); |
| 700 | int new_nbuckets = 2 * old_nbuckets + 1; |
| 701 | struct symbol **new_buckets = XCNEWVEC (struct symbol *, new_nbuckets); |
| 702 | int i; |
| 703 | |
| 704 | DICT_HASHED_NBUCKETS (dict) = new_nbuckets; |
| 705 | DICT_HASHED_BUCKETS (dict) = new_buckets; |
| 706 | |
| 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 | } |
| 724 | } |
| 725 | |
| 726 | xfree (old_buckets); |
| 727 | } |
| 728 | |
| 729 | /* See dictionary.h. */ |
| 730 | |
| 731 | unsigned int |
| 732 | default_search_name_hash (const char *string0) |
| 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 | |
| 742 | const char *string; |
| 743 | unsigned int hash; |
| 744 | |
| 745 | string = string0; |
| 746 | if (*string == '_') |
| 747 | { |
| 748 | if (startswith (string, "_ada_")) |
| 749 | string += 5; |
| 750 | else |
| 751 | return msymbol_hash_iw (string0); |
| 752 | } |
| 753 | |
| 754 | hash = 0; |
| 755 | while (*string) |
| 756 | { |
| 757 | switch (*string) |
| 758 | { |
| 759 | case '$': |
| 760 | case '.': |
| 761 | case 'X': |
| 762 | if (string0 == string) |
| 763 | return msymbol_hash_iw (string0); |
| 764 | else |
| 765 | return hash; |
| 766 | case ' ': |
| 767 | case '(': |
| 768 | return msymbol_hash_iw (string0); |
| 769 | case '_': |
| 770 | if (string[1] == '_' && string != string0) |
| 771 | { |
| 772 | int c = string[2]; |
| 773 | |
| 774 | if ((c < 'a' || c > 'z') && c != 'O') |
| 775 | return hash; |
| 776 | hash = 0; |
| 777 | string += 2; |
| 778 | continue; |
| 779 | } |
| 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; |
| 792 | break; |
| 793 | } |
| 794 | |
| 795 | hash = SYMBOL_HASH_NEXT (hash, *string); |
| 796 | string += 1; |
| 797 | } |
| 798 | return hash; |
| 799 | } |
| 800 | |
| 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 * |
| 824 | iter_match_first_linear (const struct dictionary *dict, |
| 825 | const lookup_name_info &name, |
| 826 | struct dict_iterator *iterator) |
| 827 | { |
| 828 | DICT_ITERATOR_DICT (iterator) = dict; |
| 829 | DICT_ITERATOR_INDEX (iterator) = -1; |
| 830 | |
| 831 | return iter_match_next_linear (name, iterator); |
| 832 | } |
| 833 | |
| 834 | static struct symbol * |
| 835 | iter_match_next_linear (const lookup_name_info &name, |
| 836 | struct dict_iterator *iterator) |
| 837 | { |
| 838 | const struct dictionary *dict = DICT_ITERATOR_DICT (iterator); |
| 839 | const language_defn *lang = DICT_LANGUAGE (dict); |
| 840 | symbol_name_matcher_ftype *matches_name |
| 841 | = get_symbol_name_matcher (lang, name); |
| 842 | |
| 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); |
| 849 | |
| 850 | if (matches_name (SYMBOL_SEARCH_NAME (sym), name, NULL)) |
| 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. */ |
| 885 | if (nsyms > DICT_LINEAR_EXPANDABLE_CAPACITY (dict)) |
| 886 | { |
| 887 | DICT_LINEAR_EXPANDABLE_CAPACITY (dict) *= 2; |
| 888 | DICT_LINEAR_SYMS (dict) |
| 889 | = XRESIZEVEC (struct symbol *, DICT_LINEAR_SYMS (dict), |
| 890 | DICT_LINEAR_EXPANDABLE_CAPACITY (dict)); |
| 891 | } |
| 892 | |
| 893 | DICT_LINEAR_SYM (dict, nsyms - 1) = sym; |
| 894 | } |
| 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 | |
| 936 | for (const pending *list_counter = symbol_list; |
| 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++] |
| 972 | = dict_create_hashed (obstack, language, symlist); |
| 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++] |
| 1017 | = dict_create_linear (obstack, language, symlist); |
| 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 | |
| 1163 | dict_add_pending (dict, symlist); |
| 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 | } |