| 1 | /* Demangler for the D programming language |
| 2 | Copyright (C) 2014-2019 Free Software Foundation, Inc. |
| 3 | Written by Iain Buclaw (ibuclaw@gdcproject.org) |
| 4 | |
| 5 | This file is part of the libiberty library. |
| 6 | Libiberty is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Library General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2 of the License, or (at your option) any later version. |
| 10 | |
| 11 | In addition to the permissions in the GNU Library General Public |
| 12 | License, the Free Software Foundation gives you unlimited permission |
| 13 | to link the compiled version of this file into combinations with other |
| 14 | programs, and to distribute those combinations without any restriction |
| 15 | coming from the use of this file. (The Library Public License |
| 16 | restrictions do apply in other respects; for example, they cover |
| 17 | modification of the file, and distribution when not linked into a |
| 18 | combined executable.) |
| 19 | |
| 20 | Libiberty is distributed in the hope that it will be useful, |
| 21 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 23 | Library General Public License for more details. |
| 24 | |
| 25 | You should have received a copy of the GNU Library General Public |
| 26 | License along with libiberty; see the file COPYING.LIB. |
| 27 | If not, see <http://www.gnu.org/licenses/>. */ |
| 28 | |
| 29 | /* This file exports one function; dlang_demangle. */ |
| 30 | |
| 31 | #ifdef HAVE_CONFIG_H |
| 32 | #include "config.h" |
| 33 | #endif |
| 34 | |
| 35 | #include "safe-ctype.h" |
| 36 | |
| 37 | #include <sys/types.h> |
| 38 | #include <string.h> |
| 39 | #include <stdio.h> |
| 40 | |
| 41 | #ifdef HAVE_STDLIB_H |
| 42 | #include <stdlib.h> |
| 43 | #endif |
| 44 | |
| 45 | #include <demangle.h> |
| 46 | #include "libiberty.h" |
| 47 | |
| 48 | /* A mini string-handling package */ |
| 49 | |
| 50 | typedef struct string /* Beware: these aren't required to be */ |
| 51 | { /* '\0' terminated. */ |
| 52 | char *b; /* pointer to start of string */ |
| 53 | char *p; /* pointer after last character */ |
| 54 | char *e; /* pointer after end of allocated space */ |
| 55 | } string; |
| 56 | |
| 57 | static void |
| 58 | string_need (string *s, int n) |
| 59 | { |
| 60 | int tem; |
| 61 | |
| 62 | if (s->b == NULL) |
| 63 | { |
| 64 | if (n < 32) |
| 65 | { |
| 66 | n = 32; |
| 67 | } |
| 68 | s->p = s->b = XNEWVEC (char, n); |
| 69 | s->e = s->b + n; |
| 70 | } |
| 71 | else if (s->e - s->p < n) |
| 72 | { |
| 73 | tem = s->p - s->b; |
| 74 | n += tem; |
| 75 | n *= 2; |
| 76 | s->b = XRESIZEVEC (char, s->b, n); |
| 77 | s->p = s->b + tem; |
| 78 | s->e = s->b + n; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | static void |
| 83 | string_delete (string *s) |
| 84 | { |
| 85 | if (s->b != NULL) |
| 86 | { |
| 87 | XDELETEVEC (s->b); |
| 88 | s->b = s->e = s->p = NULL; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | static void |
| 93 | string_init (string *s) |
| 94 | { |
| 95 | s->b = s->p = s->e = NULL; |
| 96 | } |
| 97 | |
| 98 | static int |
| 99 | string_length (string *s) |
| 100 | { |
| 101 | if (s->p == s->b) |
| 102 | { |
| 103 | return 0; |
| 104 | } |
| 105 | return s->p - s->b; |
| 106 | } |
| 107 | |
| 108 | static void |
| 109 | string_setlength (string *s, int n) |
| 110 | { |
| 111 | if (n - string_length (s) < 0) |
| 112 | { |
| 113 | s->p = s->b + n; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | static void |
| 118 | string_append (string *p, const char *s) |
| 119 | { |
| 120 | int n = strlen (s); |
| 121 | string_need (p, n); |
| 122 | memcpy (p->p, s, n); |
| 123 | p->p += n; |
| 124 | } |
| 125 | |
| 126 | static void |
| 127 | string_appendn (string *p, const char *s, int n) |
| 128 | { |
| 129 | if (n != 0) |
| 130 | { |
| 131 | string_need (p, n); |
| 132 | memcpy (p->p, s, n); |
| 133 | p->p += n; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | static void |
| 138 | string_prependn (string *p, const char *s, int n) |
| 139 | { |
| 140 | char *q; |
| 141 | |
| 142 | if (n != 0) |
| 143 | { |
| 144 | string_need (p, n); |
| 145 | for (q = p->p - 1; q >= p->b; q--) |
| 146 | { |
| 147 | q[n] = q[0]; |
| 148 | } |
| 149 | memcpy (p->b, s, n); |
| 150 | p->p += n; |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | static void |
| 155 | string_prepend (string *p, const char *s) |
| 156 | { |
| 157 | if (s != NULL && *s != '\0') |
| 158 | { |
| 159 | string_prependn (p, s, strlen (s)); |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | /* What kinds of symbol we could be parsing. */ |
| 164 | enum dlang_symbol_kinds |
| 165 | { |
| 166 | /* Top-level symbol, needs it's type checked. */ |
| 167 | dlang_top_level, |
| 168 | /* Function symbol, needs it's type checked. */ |
| 169 | dlang_function, |
| 170 | /* Strongly typed name, such as for classes, structs and enums. */ |
| 171 | dlang_type_name, |
| 172 | /* Template identifier. */ |
| 173 | dlang_template_ident, |
| 174 | /* Template symbol parameter. */ |
| 175 | dlang_template_param |
| 176 | }; |
| 177 | |
| 178 | /* Prototypes for forward referenced functions */ |
| 179 | static const char *dlang_function_args (string *, const char *); |
| 180 | |
| 181 | static const char *dlang_type (string *, const char *); |
| 182 | |
| 183 | static const char *dlang_value (string *, const char *, const char *, char); |
| 184 | |
| 185 | static const char *dlang_parse_qualified (string *, const char *, |
| 186 | enum dlang_symbol_kinds); |
| 187 | |
| 188 | static const char *dlang_parse_mangle (string *, const char *, |
| 189 | enum dlang_symbol_kinds); |
| 190 | |
| 191 | static const char *dlang_parse_tuple (string *, const char *); |
| 192 | |
| 193 | static const char *dlang_parse_template (string *, const char *, long); |
| 194 | |
| 195 | |
| 196 | /* Extract the number from MANGLED, and assign the result to RET. |
| 197 | Return the remaining string on success or NULL on failure. */ |
| 198 | static const char * |
| 199 | dlang_number (const char *mangled, long *ret) |
| 200 | { |
| 201 | /* Return NULL if trying to extract something that isn't a digit. */ |
| 202 | if (mangled == NULL || !ISDIGIT (*mangled)) |
| 203 | return NULL; |
| 204 | |
| 205 | (*ret) = 0; |
| 206 | |
| 207 | while (ISDIGIT (*mangled)) |
| 208 | { |
| 209 | (*ret) *= 10; |
| 210 | |
| 211 | /* If an overflow occured when multiplying by ten, the result |
| 212 | will not be a multiple of ten. */ |
| 213 | if ((*ret % 10) != 0) |
| 214 | return NULL; |
| 215 | |
| 216 | (*ret) += mangled[0] - '0'; |
| 217 | mangled++; |
| 218 | } |
| 219 | |
| 220 | if (*mangled == '\0' || *ret < 0) |
| 221 | return NULL; |
| 222 | |
| 223 | return mangled; |
| 224 | } |
| 225 | |
| 226 | /* Extract the hex-digit from MANGLED, and assign the result to RET. |
| 227 | Return the remaining string on success or NULL on failure. */ |
| 228 | static const char * |
| 229 | dlang_hexdigit (const char *mangled, char *ret) |
| 230 | { |
| 231 | char c; |
| 232 | |
| 233 | /* Return NULL if trying to extract something that isn't a hexdigit. */ |
| 234 | if (mangled == NULL || !ISXDIGIT (mangled[0]) || !ISXDIGIT (mangled[1])) |
| 235 | return NULL; |
| 236 | |
| 237 | c = mangled[0]; |
| 238 | if (!ISDIGIT (c)) |
| 239 | (*ret) = (c - (ISUPPER (c) ? 'A' : 'a') + 10); |
| 240 | else |
| 241 | (*ret) = (c - '0'); |
| 242 | |
| 243 | c = mangled[1]; |
| 244 | if (!ISDIGIT (c)) |
| 245 | (*ret) = (*ret << 4) | (c - (ISUPPER (c) ? 'A' : 'a') + 10); |
| 246 | else |
| 247 | (*ret) = (*ret << 4) | (c - '0'); |
| 248 | |
| 249 | mangled += 2; |
| 250 | |
| 251 | return mangled; |
| 252 | } |
| 253 | |
| 254 | /* Extract the function calling convention from MANGLED and |
| 255 | return 1 on success or 0 on failure. */ |
| 256 | static int |
| 257 | dlang_call_convention_p (const char *mangled) |
| 258 | { |
| 259 | switch (*mangled) |
| 260 | { |
| 261 | case 'F': case 'U': case 'V': |
| 262 | case 'W': case 'R': case 'Y': |
| 263 | return 1; |
| 264 | |
| 265 | default: |
| 266 | return 0; |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | /* Demangle the calling convention from MANGLED and append it to DECL. |
| 271 | Return the remaining string on success or NULL on failure. */ |
| 272 | static const char * |
| 273 | dlang_call_convention (string *decl, const char *mangled) |
| 274 | { |
| 275 | if (mangled == NULL || *mangled == '\0') |
| 276 | return NULL; |
| 277 | |
| 278 | switch (*mangled) |
| 279 | { |
| 280 | case 'F': /* (D) */ |
| 281 | mangled++; |
| 282 | break; |
| 283 | case 'U': /* (C) */ |
| 284 | mangled++; |
| 285 | string_append (decl, "extern(C) "); |
| 286 | break; |
| 287 | case 'W': /* (Windows) */ |
| 288 | mangled++; |
| 289 | string_append (decl, "extern(Windows) "); |
| 290 | break; |
| 291 | case 'V': /* (Pascal) */ |
| 292 | mangled++; |
| 293 | string_append (decl, "extern(Pascal) "); |
| 294 | break; |
| 295 | case 'R': /* (C++) */ |
| 296 | mangled++; |
| 297 | string_append (decl, "extern(C++) "); |
| 298 | break; |
| 299 | case 'Y': /* (Objective-C) */ |
| 300 | mangled++; |
| 301 | string_append (decl, "extern(Objective-C) "); |
| 302 | break; |
| 303 | default: |
| 304 | return NULL; |
| 305 | } |
| 306 | |
| 307 | return mangled; |
| 308 | } |
| 309 | |
| 310 | /* Extract the type modifiers from MANGLED and append them to DECL. |
| 311 | Returns the remaining signature on success or NULL on failure. */ |
| 312 | static const char * |
| 313 | dlang_type_modifiers (string *decl, const char *mangled) |
| 314 | { |
| 315 | if (mangled == NULL || *mangled == '\0') |
| 316 | return NULL; |
| 317 | |
| 318 | switch (*mangled) |
| 319 | { |
| 320 | case 'x': /* const */ |
| 321 | mangled++; |
| 322 | string_append (decl, " const"); |
| 323 | return mangled; |
| 324 | case 'y': /* immutable */ |
| 325 | mangled++; |
| 326 | string_append (decl, " immutable"); |
| 327 | return mangled; |
| 328 | case 'O': /* shared */ |
| 329 | mangled++; |
| 330 | string_append (decl, " shared"); |
| 331 | return dlang_type_modifiers (decl, mangled); |
| 332 | case 'N': |
| 333 | mangled++; |
| 334 | if (*mangled == 'g') /* wild */ |
| 335 | { |
| 336 | mangled++; |
| 337 | string_append (decl, " inout"); |
| 338 | return dlang_type_modifiers (decl, mangled); |
| 339 | } |
| 340 | else |
| 341 | return NULL; |
| 342 | |
| 343 | default: |
| 344 | return mangled; |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | /* Demangle the D function attributes from MANGLED and append it to DECL. |
| 349 | Return the remaining string on success or NULL on failure. */ |
| 350 | static const char * |
| 351 | dlang_attributes (string *decl, const char *mangled) |
| 352 | { |
| 353 | if (mangled == NULL || *mangled == '\0') |
| 354 | return NULL; |
| 355 | |
| 356 | while (*mangled == 'N') |
| 357 | { |
| 358 | mangled++; |
| 359 | switch (*mangled) |
| 360 | { |
| 361 | case 'a': /* pure */ |
| 362 | mangled++; |
| 363 | string_append (decl, "pure "); |
| 364 | continue; |
| 365 | case 'b': /* nothrow */ |
| 366 | mangled++; |
| 367 | string_append (decl, "nothrow "); |
| 368 | continue; |
| 369 | case 'c': /* ref */ |
| 370 | mangled++; |
| 371 | string_append (decl, "ref "); |
| 372 | continue; |
| 373 | case 'd': /* @property */ |
| 374 | mangled++; |
| 375 | string_append (decl, "@property "); |
| 376 | continue; |
| 377 | case 'e': /* @trusted */ |
| 378 | mangled++; |
| 379 | string_append (decl, "@trusted "); |
| 380 | continue; |
| 381 | case 'f': /* @safe */ |
| 382 | mangled++; |
| 383 | string_append (decl, "@safe "); |
| 384 | continue; |
| 385 | case 'g': |
| 386 | case 'h': |
| 387 | case 'k': |
| 388 | /* inout parameter is represented as 'Ng'. |
| 389 | vector parameter is represented as 'Nh'. |
| 390 | return paramenter is represented as 'Nk'. |
| 391 | If we see this, then we know we're really in the |
| 392 | parameter list. Rewind and break. */ |
| 393 | mangled--; |
| 394 | break; |
| 395 | case 'i': /* @nogc */ |
| 396 | mangled++; |
| 397 | string_append (decl, "@nogc "); |
| 398 | continue; |
| 399 | case 'j': /* return */ |
| 400 | mangled++; |
| 401 | string_append (decl, "return "); |
| 402 | continue; |
| 403 | case 'l': /* scope */ |
| 404 | mangled++; |
| 405 | string_append (decl, "scope "); |
| 406 | continue; |
| 407 | |
| 408 | default: /* unknown attribute */ |
| 409 | return NULL; |
| 410 | } |
| 411 | break; |
| 412 | } |
| 413 | |
| 414 | return mangled; |
| 415 | } |
| 416 | |
| 417 | /* Demangle the function type from MANGLED and append it to DECL. |
| 418 | Return the remaining string on success or NULL on failure. */ |
| 419 | static const char * |
| 420 | dlang_function_type (string *decl, const char *mangled) |
| 421 | { |
| 422 | string attr, args, type; |
| 423 | size_t szattr, szargs, sztype; |
| 424 | |
| 425 | if (mangled == NULL || *mangled == '\0') |
| 426 | return NULL; |
| 427 | |
| 428 | /* The order of the mangled string is: |
| 429 | CallConvention FuncAttrs Arguments ArgClose Type |
| 430 | |
| 431 | The demangled string is re-ordered as: |
| 432 | CallConvention Type Arguments FuncAttrs |
| 433 | */ |
| 434 | string_init (&attr); |
| 435 | string_init (&args); |
| 436 | string_init (&type); |
| 437 | |
| 438 | /* Function call convention. */ |
| 439 | mangled = dlang_call_convention (decl, mangled); |
| 440 | |
| 441 | /* Function attributes. */ |
| 442 | mangled = dlang_attributes (&attr, mangled); |
| 443 | szattr = string_length (&attr); |
| 444 | |
| 445 | /* Function arguments. */ |
| 446 | mangled = dlang_function_args (&args, mangled); |
| 447 | szargs = string_length (&args); |
| 448 | |
| 449 | /* Function return type. */ |
| 450 | mangled = dlang_type (&type, mangled); |
| 451 | sztype = string_length (&type); |
| 452 | |
| 453 | /* Append to decl in order. */ |
| 454 | string_appendn (decl, type.b, sztype); |
| 455 | string_append (decl, "("); |
| 456 | string_appendn (decl, args.b, szargs); |
| 457 | string_append (decl, ") "); |
| 458 | string_appendn (decl, attr.b, szattr); |
| 459 | |
| 460 | string_delete (&attr); |
| 461 | string_delete (&args); |
| 462 | string_delete (&type); |
| 463 | return mangled; |
| 464 | } |
| 465 | |
| 466 | /* Demangle the argument list from MANGLED and append it to DECL. |
| 467 | Return the remaining string on success or NULL on failure. */ |
| 468 | static const char * |
| 469 | dlang_function_args (string *decl, const char *mangled) |
| 470 | { |
| 471 | size_t n = 0; |
| 472 | |
| 473 | while (mangled && *mangled != '\0') |
| 474 | { |
| 475 | switch (*mangled) |
| 476 | { |
| 477 | case 'X': /* (variadic T t...) style. */ |
| 478 | mangled++; |
| 479 | string_append (decl, "..."); |
| 480 | return mangled; |
| 481 | case 'Y': /* (variadic T t, ...) style. */ |
| 482 | mangled++; |
| 483 | if (n != 0) |
| 484 | string_append (decl, ", "); |
| 485 | string_append (decl, "..."); |
| 486 | return mangled; |
| 487 | case 'Z': /* Normal function. */ |
| 488 | mangled++; |
| 489 | return mangled; |
| 490 | } |
| 491 | |
| 492 | if (n++) |
| 493 | string_append (decl, ", "); |
| 494 | |
| 495 | if (*mangled == 'M') /* scope(T) */ |
| 496 | { |
| 497 | mangled++; |
| 498 | string_append (decl, "scope "); |
| 499 | } |
| 500 | |
| 501 | if (mangled[0] == 'N' && mangled[1] == 'k') /* return(T) */ |
| 502 | { |
| 503 | mangled += 2; |
| 504 | string_append (decl, "return "); |
| 505 | } |
| 506 | |
| 507 | switch (*mangled) |
| 508 | { |
| 509 | case 'J': /* out(T) */ |
| 510 | mangled++; |
| 511 | string_append (decl, "out "); |
| 512 | break; |
| 513 | case 'K': /* ref(T) */ |
| 514 | mangled++; |
| 515 | string_append (decl, "ref "); |
| 516 | break; |
| 517 | case 'L': /* lazy(T) */ |
| 518 | mangled++; |
| 519 | string_append (decl, "lazy "); |
| 520 | break; |
| 521 | } |
| 522 | mangled = dlang_type (decl, mangled); |
| 523 | } |
| 524 | |
| 525 | return mangled; |
| 526 | } |
| 527 | |
| 528 | /* Demangle the type from MANGLED and append it to DECL. |
| 529 | Return the remaining string on success or NULL on failure. */ |
| 530 | static const char * |
| 531 | dlang_type (string *decl, const char *mangled) |
| 532 | { |
| 533 | if (mangled == NULL || *mangled == '\0') |
| 534 | return NULL; |
| 535 | |
| 536 | switch (*mangled) |
| 537 | { |
| 538 | case 'O': /* shared(T) */ |
| 539 | mangled++; |
| 540 | string_append (decl, "shared("); |
| 541 | mangled = dlang_type (decl, mangled); |
| 542 | string_append (decl, ")"); |
| 543 | return mangled; |
| 544 | case 'x': /* const(T) */ |
| 545 | mangled++; |
| 546 | string_append (decl, "const("); |
| 547 | mangled = dlang_type (decl, mangled); |
| 548 | string_append (decl, ")"); |
| 549 | return mangled; |
| 550 | case 'y': /* immutable(T) */ |
| 551 | mangled++; |
| 552 | string_append (decl, "immutable("); |
| 553 | mangled = dlang_type (decl, mangled); |
| 554 | string_append (decl, ")"); |
| 555 | return mangled; |
| 556 | case 'N': |
| 557 | mangled++; |
| 558 | if (*mangled == 'g') /* wild(T) */ |
| 559 | { |
| 560 | mangled++; |
| 561 | string_append (decl, "inout("); |
| 562 | mangled = dlang_type (decl, mangled); |
| 563 | string_append (decl, ")"); |
| 564 | return mangled; |
| 565 | } |
| 566 | else if (*mangled == 'h') /* vector(T) */ |
| 567 | { |
| 568 | mangled++; |
| 569 | string_append (decl, "__vector("); |
| 570 | mangled = dlang_type (decl, mangled); |
| 571 | string_append (decl, ")"); |
| 572 | return mangled; |
| 573 | } |
| 574 | else |
| 575 | return NULL; |
| 576 | case 'A': /* dynamic array (T[]) */ |
| 577 | mangled++; |
| 578 | mangled = dlang_type (decl, mangled); |
| 579 | string_append (decl, "[]"); |
| 580 | return mangled; |
| 581 | case 'G': /* static array (T[N]) */ |
| 582 | { |
| 583 | const char *numptr; |
| 584 | size_t num = 0; |
| 585 | mangled++; |
| 586 | |
| 587 | numptr = mangled; |
| 588 | while (ISDIGIT (*mangled)) |
| 589 | { |
| 590 | num++; |
| 591 | mangled++; |
| 592 | } |
| 593 | mangled = dlang_type (decl, mangled); |
| 594 | string_append (decl, "["); |
| 595 | string_appendn (decl, numptr, num); |
| 596 | string_append (decl, "]"); |
| 597 | return mangled; |
| 598 | } |
| 599 | case 'H': /* associative array (T[T]) */ |
| 600 | { |
| 601 | string type; |
| 602 | size_t sztype; |
| 603 | mangled++; |
| 604 | |
| 605 | string_init (&type); |
| 606 | mangled = dlang_type (&type, mangled); |
| 607 | sztype = string_length (&type); |
| 608 | |
| 609 | mangled = dlang_type (decl, mangled); |
| 610 | string_append (decl, "["); |
| 611 | string_appendn (decl, type.b, sztype); |
| 612 | string_append (decl, "]"); |
| 613 | |
| 614 | string_delete (&type); |
| 615 | return mangled; |
| 616 | } |
| 617 | case 'P': /* pointer (T*) */ |
| 618 | mangled++; |
| 619 | if (!dlang_call_convention_p (mangled)) |
| 620 | { |
| 621 | mangled = dlang_type (decl, mangled); |
| 622 | string_append (decl, "*"); |
| 623 | return mangled; |
| 624 | } |
| 625 | /* Fall through */ |
| 626 | case 'F': /* function T (D) */ |
| 627 | case 'U': /* function T (C) */ |
| 628 | case 'W': /* function T (Windows) */ |
| 629 | case 'V': /* function T (Pascal) */ |
| 630 | case 'R': /* function T (C++) */ |
| 631 | case 'Y': /* function T (Objective-C) */ |
| 632 | /* Function pointer types don't include the trailing asterisk. */ |
| 633 | mangled = dlang_function_type (decl, mangled); |
| 634 | string_append (decl, "function"); |
| 635 | return mangled; |
| 636 | case 'I': /* ident T */ |
| 637 | case 'C': /* class T */ |
| 638 | case 'S': /* struct T */ |
| 639 | case 'E': /* enum T */ |
| 640 | case 'T': /* typedef T */ |
| 641 | mangled++; |
| 642 | return dlang_parse_qualified (decl, mangled, dlang_type_name); |
| 643 | case 'D': /* delegate T */ |
| 644 | { |
| 645 | string mods; |
| 646 | size_t szmods; |
| 647 | mangled++; |
| 648 | |
| 649 | string_init (&mods); |
| 650 | mangled = dlang_type_modifiers (&mods, mangled); |
| 651 | szmods = string_length (&mods); |
| 652 | |
| 653 | mangled = dlang_function_type (decl, mangled); |
| 654 | string_append (decl, "delegate"); |
| 655 | string_appendn (decl, mods.b, szmods); |
| 656 | |
| 657 | string_delete (&mods); |
| 658 | return mangled; |
| 659 | } |
| 660 | case 'B': /* tuple T */ |
| 661 | mangled++; |
| 662 | return dlang_parse_tuple (decl, mangled); |
| 663 | |
| 664 | /* Basic types */ |
| 665 | case 'n': |
| 666 | mangled++; |
| 667 | string_append (decl, "none"); |
| 668 | return mangled; |
| 669 | case 'v': |
| 670 | mangled++; |
| 671 | string_append (decl, "void"); |
| 672 | return mangled; |
| 673 | case 'g': |
| 674 | mangled++; |
| 675 | string_append (decl, "byte"); |
| 676 | return mangled; |
| 677 | case 'h': |
| 678 | mangled++; |
| 679 | string_append (decl, "ubyte"); |
| 680 | return mangled; |
| 681 | case 's': |
| 682 | mangled++; |
| 683 | string_append (decl, "short"); |
| 684 | return mangled; |
| 685 | case 't': |
| 686 | mangled++; |
| 687 | string_append (decl, "ushort"); |
| 688 | return mangled; |
| 689 | case 'i': |
| 690 | mangled++; |
| 691 | string_append (decl, "int"); |
| 692 | return mangled; |
| 693 | case 'k': |
| 694 | mangled++; |
| 695 | string_append (decl, "uint"); |
| 696 | return mangled; |
| 697 | case 'l': |
| 698 | mangled++; |
| 699 | string_append (decl, "long"); |
| 700 | return mangled; |
| 701 | case 'm': |
| 702 | mangled++; |
| 703 | string_append (decl, "ulong"); |
| 704 | return mangled; |
| 705 | case 'f': |
| 706 | mangled++; |
| 707 | string_append (decl, "float"); |
| 708 | return mangled; |
| 709 | case 'd': |
| 710 | mangled++; |
| 711 | string_append (decl, "double"); |
| 712 | return mangled; |
| 713 | case 'e': |
| 714 | mangled++; |
| 715 | string_append (decl, "real"); |
| 716 | return mangled; |
| 717 | |
| 718 | /* Imaginary and Complex types */ |
| 719 | case 'o': |
| 720 | mangled++; |
| 721 | string_append (decl, "ifloat"); |
| 722 | return mangled; |
| 723 | case 'p': |
| 724 | mangled++; |
| 725 | string_append (decl, "idouble"); |
| 726 | return mangled; |
| 727 | case 'j': |
| 728 | mangled++; |
| 729 | string_append (decl, "ireal"); |
| 730 | return mangled; |
| 731 | case 'q': |
| 732 | mangled++; |
| 733 | string_append (decl, "cfloat"); |
| 734 | return mangled; |
| 735 | case 'r': |
| 736 | mangled++; |
| 737 | string_append (decl, "cdouble"); |
| 738 | return mangled; |
| 739 | case 'c': |
| 740 | mangled++; |
| 741 | string_append (decl, "creal"); |
| 742 | return mangled; |
| 743 | |
| 744 | /* Other types */ |
| 745 | case 'b': |
| 746 | mangled++; |
| 747 | string_append (decl, "bool"); |
| 748 | return mangled; |
| 749 | case 'a': |
| 750 | mangled++; |
| 751 | string_append (decl, "char"); |
| 752 | return mangled; |
| 753 | case 'u': |
| 754 | mangled++; |
| 755 | string_append (decl, "wchar"); |
| 756 | return mangled; |
| 757 | case 'w': |
| 758 | mangled++; |
| 759 | string_append (decl, "dchar"); |
| 760 | return mangled; |
| 761 | case 'z': |
| 762 | mangled++; |
| 763 | switch (*mangled) |
| 764 | { |
| 765 | case 'i': |
| 766 | mangled++; |
| 767 | string_append (decl, "cent"); |
| 768 | return mangled; |
| 769 | case 'k': |
| 770 | mangled++; |
| 771 | string_append (decl, "ucent"); |
| 772 | return mangled; |
| 773 | } |
| 774 | return NULL; |
| 775 | |
| 776 | default: /* unhandled */ |
| 777 | return NULL; |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | /* Extract the identifier from MANGLED and append it to DECL. |
| 782 | Return the remaining string on success or NULL on failure. */ |
| 783 | static const char * |
| 784 | dlang_identifier (string *decl, const char *mangled, |
| 785 | enum dlang_symbol_kinds kind) |
| 786 | { |
| 787 | long len; |
| 788 | const char *endptr = dlang_number (mangled, &len); |
| 789 | |
| 790 | if (endptr == NULL || len == 0) |
| 791 | return NULL; |
| 792 | |
| 793 | /* In template parameter symbols, the first character of the mangled |
| 794 | name can be a digit. This causes ambiguity issues because the |
| 795 | digits of the two numbers are adjacent. */ |
| 796 | if (kind == dlang_template_param) |
| 797 | { |
| 798 | long psize = len; |
| 799 | const char *pend; |
| 800 | int saved = string_length (decl); |
| 801 | |
| 802 | /* Work backwards until a match is found. */ |
| 803 | for (pend = endptr; endptr != NULL; pend--) |
| 804 | { |
| 805 | mangled = pend; |
| 806 | |
| 807 | /* Reached the beginning of the pointer to the name length, |
| 808 | try parsing the entire symbol. */ |
| 809 | if (psize == 0) |
| 810 | { |
| 811 | psize = len; |
| 812 | pend = endptr; |
| 813 | endptr = NULL; |
| 814 | } |
| 815 | |
| 816 | /* Check whether template parameter is a function with a valid |
| 817 | return type or an untyped identifier. */ |
| 818 | if (ISDIGIT (*mangled)) |
| 819 | mangled = dlang_parse_qualified (decl, mangled, |
| 820 | dlang_template_ident); |
| 821 | else if (strncmp (mangled, "_D", 2) == 0) |
| 822 | mangled = dlang_parse_mangle (decl, mangled, dlang_function); |
| 823 | |
| 824 | /* Check for name length mismatch. */ |
| 825 | if (mangled && (mangled - pend) == psize) |
| 826 | return mangled; |
| 827 | |
| 828 | psize /= 10; |
| 829 | string_setlength (decl, saved); |
| 830 | } |
| 831 | |
| 832 | /* No match on any combinations. */ |
| 833 | return NULL; |
| 834 | } |
| 835 | else |
| 836 | { |
| 837 | if (strlen (endptr) < (size_t) len) |
| 838 | return NULL; |
| 839 | |
| 840 | mangled = endptr; |
| 841 | |
| 842 | /* May be a template instance. */ |
| 843 | if (len >= 5 && mangled[0] == '_' && mangled[1] == '_' |
| 844 | && (mangled[2] == 'T' || mangled[2] == 'U')) |
| 845 | return dlang_parse_template (decl, mangled, len); |
| 846 | |
| 847 | switch (len) |
| 848 | { |
| 849 | case 6: |
| 850 | if (strncmp (mangled, "__ctor", len) == 0) |
| 851 | { |
| 852 | /* Constructor symbol for a class/struct. */ |
| 853 | string_append (decl, "this"); |
| 854 | mangled += len; |
| 855 | return mangled; |
| 856 | } |
| 857 | else if (strncmp (mangled, "__dtor", len) == 0) |
| 858 | { |
| 859 | /* Destructor symbol for a class/struct. */ |
| 860 | string_append (decl, "~this"); |
| 861 | mangled += len; |
| 862 | return mangled; |
| 863 | } |
| 864 | else if (strncmp (mangled, "__initZ", len+1) == 0) |
| 865 | { |
| 866 | /* The static initialiser for a given symbol. */ |
| 867 | string_prepend (decl, "initializer for "); |
| 868 | string_setlength (decl, string_length (decl) - 1); |
| 869 | mangled += len; |
| 870 | return mangled; |
| 871 | } |
| 872 | else if (strncmp (mangled, "__vtblZ", len+1) == 0) |
| 873 | { |
| 874 | /* The vtable symbol for a given class. */ |
| 875 | string_prepend (decl, "vtable for "); |
| 876 | string_setlength (decl, string_length (decl) - 1); |
| 877 | mangled += len; |
| 878 | return mangled; |
| 879 | } |
| 880 | break; |
| 881 | |
| 882 | case 7: |
| 883 | if (strncmp (mangled, "__ClassZ", len+1) == 0) |
| 884 | { |
| 885 | /* The classinfo symbol for a given class. */ |
| 886 | string_prepend (decl, "ClassInfo for "); |
| 887 | string_setlength (decl, string_length (decl) - 1); |
| 888 | mangled += len; |
| 889 | return mangled; |
| 890 | } |
| 891 | break; |
| 892 | |
| 893 | case 10: |
| 894 | if (strncmp (mangled, "__postblitMFZ", len+3) == 0) |
| 895 | { |
| 896 | /* Postblit symbol for a struct. */ |
| 897 | string_append (decl, "this(this)"); |
| 898 | mangled += len + 3; |
| 899 | return mangled; |
| 900 | } |
| 901 | break; |
| 902 | |
| 903 | case 11: |
| 904 | if (strncmp (mangled, "__InterfaceZ", len+1) == 0) |
| 905 | { |
| 906 | /* The interface symbol for a given class. */ |
| 907 | string_prepend (decl, "Interface for "); |
| 908 | string_setlength (decl, string_length (decl) - 1); |
| 909 | mangled += len; |
| 910 | return mangled; |
| 911 | } |
| 912 | break; |
| 913 | |
| 914 | case 12: |
| 915 | if (strncmp (mangled, "__ModuleInfoZ", len+1) == 0) |
| 916 | { |
| 917 | /* The ModuleInfo symbol for a given module. */ |
| 918 | string_prepend (decl, "ModuleInfo for "); |
| 919 | string_setlength (decl, string_length (decl) - 1); |
| 920 | mangled += len; |
| 921 | return mangled; |
| 922 | } |
| 923 | break; |
| 924 | } |
| 925 | |
| 926 | string_appendn (decl, mangled, len); |
| 927 | mangled += len; |
| 928 | } |
| 929 | |
| 930 | return mangled; |
| 931 | } |
| 932 | |
| 933 | /* Extract the integer value from MANGLED and append it to DECL, |
| 934 | where TYPE is the type it should be represented as. |
| 935 | Return the remaining string on success or NULL on failure. */ |
| 936 | static const char * |
| 937 | dlang_parse_integer (string *decl, const char *mangled, char type) |
| 938 | { |
| 939 | if (type == 'a' || type == 'u' || type == 'w') |
| 940 | { |
| 941 | /* Parse character value. */ |
| 942 | char value[20]; |
| 943 | int pos = sizeof(value); |
| 944 | int width = 0; |
| 945 | long val; |
| 946 | |
| 947 | mangled = dlang_number (mangled, &val); |
| 948 | if (mangled == NULL) |
| 949 | return NULL; |
| 950 | |
| 951 | string_append (decl, "'"); |
| 952 | |
| 953 | if (type == 'a' && val >= 0x20 && val < 0x7F) |
| 954 | { |
| 955 | /* Represent as a character literal. */ |
| 956 | char c = (char) val; |
| 957 | string_appendn (decl, &c, 1); |
| 958 | } |
| 959 | else |
| 960 | { |
| 961 | /* Represent as a hexadecimal value. */ |
| 962 | switch (type) |
| 963 | { |
| 964 | case 'a': /* char */ |
| 965 | string_append (decl, "\\x"); |
| 966 | width = 2; |
| 967 | break; |
| 968 | case 'u': /* wchar */ |
| 969 | string_append (decl, "\\u"); |
| 970 | width = 4; |
| 971 | break; |
| 972 | case 'w': /* dchar */ |
| 973 | string_append (decl, "\\U"); |
| 974 | width = 8; |
| 975 | break; |
| 976 | } |
| 977 | |
| 978 | while (val > 0) |
| 979 | { |
| 980 | int digit = val % 16; |
| 981 | |
| 982 | if (digit < 10) |
| 983 | value[--pos] = (char)(digit + '0'); |
| 984 | else |
| 985 | value[--pos] = (char)((digit - 10) + 'a'); |
| 986 | |
| 987 | val /= 16; |
| 988 | width--; |
| 989 | } |
| 990 | |
| 991 | for (; width > 0; width--) |
| 992 | value[--pos] = '0'; |
| 993 | |
| 994 | string_appendn (decl, &(value[pos]), sizeof(value) - pos); |
| 995 | } |
| 996 | string_append (decl, "'"); |
| 997 | } |
| 998 | else if (type == 'b') |
| 999 | { |
| 1000 | /* Parse boolean value. */ |
| 1001 | long val; |
| 1002 | |
| 1003 | mangled = dlang_number (mangled, &val); |
| 1004 | if (mangled == NULL) |
| 1005 | return NULL; |
| 1006 | |
| 1007 | string_append (decl, val ? "true" : "false"); |
| 1008 | } |
| 1009 | else |
| 1010 | { |
| 1011 | /* Parse integer value. */ |
| 1012 | const char *numptr = mangled; |
| 1013 | size_t num = 0; |
| 1014 | |
| 1015 | if (! ISDIGIT (*mangled)) |
| 1016 | return NULL; |
| 1017 | |
| 1018 | while (ISDIGIT (*mangled)) |
| 1019 | { |
| 1020 | num++; |
| 1021 | mangled++; |
| 1022 | } |
| 1023 | string_appendn (decl, numptr, num); |
| 1024 | |
| 1025 | /* Append suffix. */ |
| 1026 | switch (type) |
| 1027 | { |
| 1028 | case 'h': /* ubyte */ |
| 1029 | case 't': /* ushort */ |
| 1030 | case 'k': /* uint */ |
| 1031 | string_append (decl, "u"); |
| 1032 | break; |
| 1033 | case 'l': /* long */ |
| 1034 | string_append (decl, "L"); |
| 1035 | break; |
| 1036 | case 'm': /* ulong */ |
| 1037 | string_append (decl, "uL"); |
| 1038 | break; |
| 1039 | } |
| 1040 | } |
| 1041 | |
| 1042 | return mangled; |
| 1043 | } |
| 1044 | |
| 1045 | /* Extract the floating-point value from MANGLED and append it to DECL. |
| 1046 | Return the remaining string on success or NULL on failure. */ |
| 1047 | static const char * |
| 1048 | dlang_parse_real (string *decl, const char *mangled) |
| 1049 | { |
| 1050 | /* Handle NAN and +-INF. */ |
| 1051 | if (strncmp (mangled, "NAN", 3) == 0) |
| 1052 | { |
| 1053 | string_append (decl, "NaN"); |
| 1054 | mangled += 3; |
| 1055 | return mangled; |
| 1056 | } |
| 1057 | else if (strncmp (mangled, "INF", 3) == 0) |
| 1058 | { |
| 1059 | string_append (decl, "Inf"); |
| 1060 | mangled += 3; |
| 1061 | return mangled; |
| 1062 | } |
| 1063 | else if (strncmp (mangled, "NINF", 4) == 0) |
| 1064 | { |
| 1065 | string_append (decl, "-Inf"); |
| 1066 | mangled += 4; |
| 1067 | return mangled; |
| 1068 | } |
| 1069 | |
| 1070 | /* Hexadecimal prefix and leading bit. */ |
| 1071 | if (*mangled == 'N') |
| 1072 | { |
| 1073 | string_append (decl, "-"); |
| 1074 | mangled++; |
| 1075 | } |
| 1076 | |
| 1077 | if (!ISXDIGIT (*mangled)) |
| 1078 | return NULL; |
| 1079 | |
| 1080 | string_append (decl, "0x"); |
| 1081 | string_appendn (decl, mangled, 1); |
| 1082 | string_append (decl, "."); |
| 1083 | mangled++; |
| 1084 | |
| 1085 | /* Significand. */ |
| 1086 | while (ISXDIGIT (*mangled)) |
| 1087 | { |
| 1088 | string_appendn (decl, mangled, 1); |
| 1089 | mangled++; |
| 1090 | } |
| 1091 | |
| 1092 | /* Exponent. */ |
| 1093 | if (*mangled != 'P') |
| 1094 | return NULL; |
| 1095 | |
| 1096 | string_append (decl, "p"); |
| 1097 | mangled++; |
| 1098 | |
| 1099 | if (*mangled == 'N') |
| 1100 | { |
| 1101 | string_append (decl, "-"); |
| 1102 | mangled++; |
| 1103 | } |
| 1104 | |
| 1105 | while (ISDIGIT (*mangled)) |
| 1106 | { |
| 1107 | string_appendn (decl, mangled, 1); |
| 1108 | mangled++; |
| 1109 | } |
| 1110 | |
| 1111 | return mangled; |
| 1112 | } |
| 1113 | |
| 1114 | /* Extract the string value from MANGLED and append it to DECL. |
| 1115 | Return the remaining string on success or NULL on failure. */ |
| 1116 | static const char * |
| 1117 | dlang_parse_string (string *decl, const char *mangled) |
| 1118 | { |
| 1119 | char type = *mangled; |
| 1120 | long len; |
| 1121 | |
| 1122 | mangled++; |
| 1123 | mangled = dlang_number (mangled, &len); |
| 1124 | if (mangled == NULL || *mangled != '_') |
| 1125 | return NULL; |
| 1126 | |
| 1127 | mangled++; |
| 1128 | string_append (decl, "\""); |
| 1129 | while (len--) |
| 1130 | { |
| 1131 | char val; |
| 1132 | const char *endptr = dlang_hexdigit (mangled, &val); |
| 1133 | |
| 1134 | if (endptr == NULL) |
| 1135 | return NULL; |
| 1136 | |
| 1137 | /* Sanitize white and non-printable characters. */ |
| 1138 | switch (val) |
| 1139 | { |
| 1140 | case ' ': |
| 1141 | string_append (decl, " "); |
| 1142 | break; |
| 1143 | case '\t': |
| 1144 | string_append (decl, "\\t"); |
| 1145 | break; |
| 1146 | case '\n': |
| 1147 | string_append (decl, "\\n"); |
| 1148 | break; |
| 1149 | case '\r': |
| 1150 | string_append (decl, "\\r"); |
| 1151 | break; |
| 1152 | case '\f': |
| 1153 | string_append (decl, "\\f"); |
| 1154 | break; |
| 1155 | case '\v': |
| 1156 | string_append (decl, "\\v"); |
| 1157 | break; |
| 1158 | |
| 1159 | default: |
| 1160 | if (ISPRINT (val)) |
| 1161 | string_appendn (decl, &val, 1); |
| 1162 | else |
| 1163 | { |
| 1164 | string_append (decl, "\\x"); |
| 1165 | string_appendn (decl, mangled, 2); |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | mangled = endptr; |
| 1170 | } |
| 1171 | string_append (decl, "\""); |
| 1172 | |
| 1173 | if (type != 'a') |
| 1174 | string_appendn (decl, &type, 1); |
| 1175 | |
| 1176 | return mangled; |
| 1177 | } |
| 1178 | |
| 1179 | /* Extract the static array value from MANGLED and append it to DECL. |
| 1180 | Return the remaining string on success or NULL on failure. */ |
| 1181 | static const char * |
| 1182 | dlang_parse_arrayliteral (string *decl, const char *mangled) |
| 1183 | { |
| 1184 | long elements; |
| 1185 | |
| 1186 | mangled = dlang_number (mangled, &elements); |
| 1187 | if (mangled == NULL) |
| 1188 | return NULL; |
| 1189 | |
| 1190 | string_append (decl, "["); |
| 1191 | while (elements--) |
| 1192 | { |
| 1193 | mangled = dlang_value (decl, mangled, NULL, '\0'); |
| 1194 | if (mangled == NULL) |
| 1195 | return NULL; |
| 1196 | |
| 1197 | if (elements != 0) |
| 1198 | string_append (decl, ", "); |
| 1199 | } |
| 1200 | |
| 1201 | string_append (decl, "]"); |
| 1202 | return mangled; |
| 1203 | } |
| 1204 | |
| 1205 | /* Extract the associative array value from MANGLED and append it to DECL. |
| 1206 | Return the remaining string on success or NULL on failure. */ |
| 1207 | static const char * |
| 1208 | dlang_parse_assocarray (string *decl, const char *mangled) |
| 1209 | { |
| 1210 | long elements; |
| 1211 | |
| 1212 | mangled = dlang_number (mangled, &elements); |
| 1213 | if (mangled == NULL) |
| 1214 | return NULL; |
| 1215 | |
| 1216 | string_append (decl, "["); |
| 1217 | while (elements--) |
| 1218 | { |
| 1219 | mangled = dlang_value (decl, mangled, NULL, '\0'); |
| 1220 | if (mangled == NULL) |
| 1221 | return NULL; |
| 1222 | |
| 1223 | string_append (decl, ":"); |
| 1224 | mangled = dlang_value (decl, mangled, NULL, '\0'); |
| 1225 | if (mangled == NULL) |
| 1226 | return NULL; |
| 1227 | |
| 1228 | if (elements != 0) |
| 1229 | string_append (decl, ", "); |
| 1230 | } |
| 1231 | |
| 1232 | string_append (decl, "]"); |
| 1233 | return mangled; |
| 1234 | } |
| 1235 | |
| 1236 | /* Extract the struct literal value for NAME from MANGLED and append it to DECL. |
| 1237 | Return the remaining string on success or NULL on failure. */ |
| 1238 | static const char * |
| 1239 | dlang_parse_structlit (string *decl, const char *mangled, const char *name) |
| 1240 | { |
| 1241 | long args; |
| 1242 | |
| 1243 | mangled = dlang_number (mangled, &args); |
| 1244 | if (mangled == NULL) |
| 1245 | return NULL; |
| 1246 | |
| 1247 | if (name != NULL) |
| 1248 | string_append (decl, name); |
| 1249 | |
| 1250 | string_append (decl, "("); |
| 1251 | while (args--) |
| 1252 | { |
| 1253 | mangled = dlang_value (decl, mangled, NULL, '\0'); |
| 1254 | if (mangled == NULL) |
| 1255 | return NULL; |
| 1256 | |
| 1257 | if (args != 0) |
| 1258 | string_append (decl, ", "); |
| 1259 | } |
| 1260 | |
| 1261 | string_append (decl, ")"); |
| 1262 | return mangled; |
| 1263 | } |
| 1264 | |
| 1265 | /* Extract the value from MANGLED and append it to DECL. |
| 1266 | Return the remaining string on success or NULL on failure. */ |
| 1267 | static const char * |
| 1268 | dlang_value (string *decl, const char *mangled, const char *name, char type) |
| 1269 | { |
| 1270 | if (mangled == NULL || *mangled == '\0') |
| 1271 | return NULL; |
| 1272 | |
| 1273 | switch (*mangled) |
| 1274 | { |
| 1275 | /* Null value. */ |
| 1276 | case 'n': |
| 1277 | mangled++; |
| 1278 | string_append (decl, "null"); |
| 1279 | break; |
| 1280 | |
| 1281 | /* Integral values. */ |
| 1282 | case 'N': |
| 1283 | mangled++; |
| 1284 | string_append (decl, "-"); |
| 1285 | mangled = dlang_parse_integer (decl, mangled, type); |
| 1286 | break; |
| 1287 | |
| 1288 | case 'i': |
| 1289 | mangled++; |
| 1290 | /* Fall through */ |
| 1291 | |
| 1292 | /* There really should always be an `i' before encoded numbers, but there |
| 1293 | wasn't in early versions of D2, so this case range must remain for |
| 1294 | backwards compatibility. */ |
| 1295 | case '0': case '1': case '2': case '3': case '4': |
| 1296 | case '5': case '6': case '7': case '8': case '9': |
| 1297 | mangled = dlang_parse_integer (decl, mangled, type); |
| 1298 | break; |
| 1299 | |
| 1300 | /* Real value. */ |
| 1301 | case 'e': |
| 1302 | mangled++; |
| 1303 | mangled = dlang_parse_real (decl, mangled); |
| 1304 | break; |
| 1305 | |
| 1306 | /* Complex value. */ |
| 1307 | case 'c': |
| 1308 | mangled++; |
| 1309 | mangled = dlang_parse_real (decl, mangled); |
| 1310 | string_append (decl, "+"); |
| 1311 | if (mangled == NULL || *mangled != 'c') |
| 1312 | return NULL; |
| 1313 | mangled++; |
| 1314 | mangled = dlang_parse_real (decl, mangled); |
| 1315 | string_append (decl, "i"); |
| 1316 | break; |
| 1317 | |
| 1318 | /* String values. */ |
| 1319 | case 'a': /* UTF8 */ |
| 1320 | case 'w': /* UTF16 */ |
| 1321 | case 'd': /* UTF32 */ |
| 1322 | mangled = dlang_parse_string (decl, mangled); |
| 1323 | break; |
| 1324 | |
| 1325 | /* Array values. */ |
| 1326 | case 'A': |
| 1327 | mangled++; |
| 1328 | if (type == 'H') |
| 1329 | mangled = dlang_parse_assocarray (decl, mangled); |
| 1330 | else |
| 1331 | mangled = dlang_parse_arrayliteral (decl, mangled); |
| 1332 | break; |
| 1333 | |
| 1334 | /* Struct values. */ |
| 1335 | case 'S': |
| 1336 | mangled++; |
| 1337 | mangled = dlang_parse_structlit (decl, mangled, name); |
| 1338 | break; |
| 1339 | |
| 1340 | default: |
| 1341 | return NULL; |
| 1342 | } |
| 1343 | |
| 1344 | return mangled; |
| 1345 | } |
| 1346 | |
| 1347 | /* Extract and demangle the symbol in MANGLED and append it to DECL. |
| 1348 | Returns the remaining signature on success or NULL on failure. */ |
| 1349 | static const char * |
| 1350 | dlang_parse_mangle (string *decl, const char *mangled, |
| 1351 | enum dlang_symbol_kinds kind) |
| 1352 | { |
| 1353 | /* A D mangled symbol is comprised of both scope and type information. |
| 1354 | |
| 1355 | MangleName: |
| 1356 | _D QualifiedName Type |
| 1357 | _D QualifiedName M Type |
| 1358 | _D QualifiedName Z |
| 1359 | ^ |
| 1360 | The caller should have guaranteed that the start pointer is at the |
| 1361 | above location. |
| 1362 | */ |
| 1363 | mangled += 2; |
| 1364 | |
| 1365 | mangled = dlang_parse_qualified (decl, mangled, dlang_top_level); |
| 1366 | |
| 1367 | if (mangled != NULL) |
| 1368 | { |
| 1369 | /* Artificial symbols end with 'Z' and have no type. */ |
| 1370 | if (*mangled == 'Z') |
| 1371 | mangled++; |
| 1372 | else |
| 1373 | { |
| 1374 | string mods; |
| 1375 | int saved; |
| 1376 | |
| 1377 | /* Skip over 'this' parameter. */ |
| 1378 | if (*mangled == 'M') |
| 1379 | mangled++; |
| 1380 | |
| 1381 | /* Save the type modifiers for appending at the end if needed. */ |
| 1382 | string_init (&mods); |
| 1383 | mangled = dlang_type_modifiers (&mods, mangled); |
| 1384 | |
| 1385 | if (mangled && dlang_call_convention_p (mangled)) |
| 1386 | { |
| 1387 | /* Skip over calling convention and attributes. */ |
| 1388 | saved = string_length (decl); |
| 1389 | mangled = dlang_call_convention (decl, mangled); |
| 1390 | mangled = dlang_attributes (decl, mangled); |
| 1391 | string_setlength (decl, saved); |
| 1392 | |
| 1393 | string_append (decl, "("); |
| 1394 | mangled = dlang_function_args (decl, mangled); |
| 1395 | string_append (decl, ")"); |
| 1396 | |
| 1397 | /* Add any const/immutable/shared modifier. */ |
| 1398 | string_appendn (decl, mods.b, string_length (&mods)); |
| 1399 | } |
| 1400 | |
| 1401 | /* Consume the decl type of symbol. */ |
| 1402 | saved = string_length (decl); |
| 1403 | mangled = dlang_type (decl, mangled); |
| 1404 | string_setlength (decl, saved); |
| 1405 | |
| 1406 | string_delete (&mods); |
| 1407 | } |
| 1408 | } |
| 1409 | |
| 1410 | /* Check that the entire symbol was successfully demangled. */ |
| 1411 | if (kind == dlang_top_level) |
| 1412 | { |
| 1413 | if (mangled == NULL || *mangled != '\0') |
| 1414 | return NULL; |
| 1415 | } |
| 1416 | |
| 1417 | return mangled; |
| 1418 | } |
| 1419 | |
| 1420 | /* Extract and demangle the qualified symbol in MANGLED and append it to DECL. |
| 1421 | Returns the remaining signature on success or NULL on failure. */ |
| 1422 | static const char * |
| 1423 | dlang_parse_qualified (string *decl, const char *mangled, |
| 1424 | enum dlang_symbol_kinds kind) |
| 1425 | { |
| 1426 | /* Qualified names are identifiers separated by their encoded length. |
| 1427 | Nested functions also encode their argument types without specifying |
| 1428 | what they return. |
| 1429 | |
| 1430 | QualifiedName: |
| 1431 | SymbolName |
| 1432 | SymbolName QualifiedName |
| 1433 | SymbolName TypeFunctionNoReturn QualifiedName |
| 1434 | SymbolName M TypeModifiers TypeFunctionNoReturn QualifiedName |
| 1435 | ^ |
| 1436 | The start pointer should be at the above location. |
| 1437 | */ |
| 1438 | size_t n = 0; |
| 1439 | do |
| 1440 | { |
| 1441 | if (n++) |
| 1442 | string_append (decl, "."); |
| 1443 | |
| 1444 | /* Skip over anonymous symbols. */ |
| 1445 | while (*mangled == '0') |
| 1446 | mangled++; |
| 1447 | |
| 1448 | mangled = dlang_identifier (decl, mangled, kind); |
| 1449 | |
| 1450 | /* Consume the encoded arguments. However if this is not followed by the |
| 1451 | next encoded length, then this is not a continuation of a qualified |
| 1452 | name, in which case we backtrack and return the current unconsumed |
| 1453 | position of the mangled decl. */ |
| 1454 | if (mangled && (*mangled == 'M' || dlang_call_convention_p (mangled))) |
| 1455 | { |
| 1456 | const char *start = mangled; |
| 1457 | int saved = string_length (decl); |
| 1458 | |
| 1459 | /* Skip over 'this' parameter and type modifiers. */ |
| 1460 | if (*mangled == 'M') |
| 1461 | { |
| 1462 | mangled++; |
| 1463 | mangled = dlang_type_modifiers (decl, mangled); |
| 1464 | string_setlength (decl, saved); |
| 1465 | } |
| 1466 | |
| 1467 | /* The rule we expect to match in the mangled string is: |
| 1468 | |
| 1469 | TypeFunctionNoReturn: |
| 1470 | CallConvention FuncAttrs Arguments ArgClose |
| 1471 | |
| 1472 | The calling convention and function attributes are not included |
| 1473 | in the demangled string. */ |
| 1474 | mangled = dlang_call_convention (decl, mangled); |
| 1475 | mangled = dlang_attributes (decl, mangled); |
| 1476 | string_setlength (decl, saved); |
| 1477 | |
| 1478 | string_append (decl, "("); |
| 1479 | mangled = dlang_function_args (decl, mangled); |
| 1480 | string_append (decl, ")"); |
| 1481 | |
| 1482 | if (mangled == NULL || !ISDIGIT (*mangled)) |
| 1483 | { |
| 1484 | /* Did not match the rule we were looking for. */ |
| 1485 | mangled = start; |
| 1486 | string_setlength (decl, saved); |
| 1487 | } |
| 1488 | } |
| 1489 | } |
| 1490 | while (mangled && ISDIGIT (*mangled)); |
| 1491 | |
| 1492 | return mangled; |
| 1493 | } |
| 1494 | |
| 1495 | /* Demangle the tuple from MANGLED and append it to DECL. |
| 1496 | Return the remaining string on success or NULL on failure. */ |
| 1497 | static const char * |
| 1498 | dlang_parse_tuple (string *decl, const char *mangled) |
| 1499 | { |
| 1500 | long elements; |
| 1501 | |
| 1502 | mangled = dlang_number (mangled, &elements); |
| 1503 | if (mangled == NULL) |
| 1504 | return NULL; |
| 1505 | |
| 1506 | string_append (decl, "Tuple!("); |
| 1507 | |
| 1508 | while (elements--) |
| 1509 | { |
| 1510 | mangled = dlang_type (decl, mangled); |
| 1511 | if (mangled == NULL) |
| 1512 | return NULL; |
| 1513 | |
| 1514 | if (elements != 0) |
| 1515 | string_append (decl, ", "); |
| 1516 | } |
| 1517 | |
| 1518 | string_append (decl, ")"); |
| 1519 | return mangled; |
| 1520 | } |
| 1521 | |
| 1522 | /* Demangle the argument list from MANGLED and append it to DECL. |
| 1523 | Return the remaining string on success or NULL on failure. */ |
| 1524 | static const char * |
| 1525 | dlang_template_args (string *decl, const char *mangled) |
| 1526 | { |
| 1527 | size_t n = 0; |
| 1528 | |
| 1529 | while (mangled && *mangled != '\0') |
| 1530 | { |
| 1531 | switch (*mangled) |
| 1532 | { |
| 1533 | case 'Z': /* End of parameter list. */ |
| 1534 | mangled++; |
| 1535 | return mangled; |
| 1536 | } |
| 1537 | |
| 1538 | if (n++) |
| 1539 | string_append (decl, ", "); |
| 1540 | |
| 1541 | /* Skip over specialised template prefix. */ |
| 1542 | if (*mangled == 'H') |
| 1543 | mangled++; |
| 1544 | |
| 1545 | switch (*mangled) |
| 1546 | { |
| 1547 | case 'S': /* Symbol parameter. */ |
| 1548 | mangled++; |
| 1549 | mangled = dlang_identifier (decl, mangled, dlang_template_param); |
| 1550 | break; |
| 1551 | case 'T': /* Type parameter. */ |
| 1552 | mangled++; |
| 1553 | mangled = dlang_type (decl, mangled); |
| 1554 | break; |
| 1555 | case 'V': /* Value parameter. */ |
| 1556 | { |
| 1557 | string name; |
| 1558 | char type; |
| 1559 | |
| 1560 | /* Peek at the type. */ |
| 1561 | mangled++; |
| 1562 | type = *mangled; |
| 1563 | |
| 1564 | /* In the few instances where the type is actually desired in |
| 1565 | the output, it should precede the value from dlang_value. */ |
| 1566 | string_init (&name); |
| 1567 | mangled = dlang_type (&name, mangled); |
| 1568 | string_need (&name, 1); |
| 1569 | *(name.p) = '\0'; |
| 1570 | |
| 1571 | mangled = dlang_value (decl, mangled, name.b, type); |
| 1572 | string_delete (&name); |
| 1573 | break; |
| 1574 | } |
| 1575 | |
| 1576 | default: |
| 1577 | return NULL; |
| 1578 | } |
| 1579 | } |
| 1580 | |
| 1581 | return mangled; |
| 1582 | } |
| 1583 | |
| 1584 | /* Extract and demangle the template symbol in MANGLED, expected to |
| 1585 | be made up of LEN characters, and append it to DECL. |
| 1586 | Returns the remaining signature on success or NULL on failure. */ |
| 1587 | static const char * |
| 1588 | dlang_parse_template (string *decl, const char *mangled, long len) |
| 1589 | { |
| 1590 | const char *start = mangled; |
| 1591 | |
| 1592 | /* Template instance names have the types and values of its parameters |
| 1593 | encoded into it. |
| 1594 | |
| 1595 | TemplateInstanceName: |
| 1596 | Number __T LName TemplateArgs Z |
| 1597 | Number __U LName TemplateArgs Z |
| 1598 | ^ |
| 1599 | The start pointer should be at the above location, and LEN should be |
| 1600 | the value of the decoded number. |
| 1601 | */ |
| 1602 | |
| 1603 | /* Template symbol. */ |
| 1604 | if (!ISDIGIT (mangled[3]) || mangled[3] == '0') |
| 1605 | return NULL; |
| 1606 | |
| 1607 | mangled += 3; |
| 1608 | |
| 1609 | /* Template identifier. */ |
| 1610 | mangled = dlang_identifier (decl, mangled, dlang_template_ident); |
| 1611 | |
| 1612 | /* Template arguments. */ |
| 1613 | string_append (decl, "!("); |
| 1614 | mangled = dlang_template_args (decl, mangled); |
| 1615 | string_append (decl, ")"); |
| 1616 | |
| 1617 | /* Check for template name length mismatch. */ |
| 1618 | if (mangled && (mangled - start) != len) |
| 1619 | return NULL; |
| 1620 | |
| 1621 | return mangled; |
| 1622 | } |
| 1623 | |
| 1624 | /* Extract and demangle the symbol in MANGLED. Returns the demangled |
| 1625 | signature on success or NULL on failure. */ |
| 1626 | |
| 1627 | char * |
| 1628 | dlang_demangle (const char *mangled, int option ATTRIBUTE_UNUSED) |
| 1629 | { |
| 1630 | string decl; |
| 1631 | char *demangled = NULL; |
| 1632 | |
| 1633 | if (mangled == NULL || *mangled == '\0') |
| 1634 | return NULL; |
| 1635 | |
| 1636 | if (strncmp (mangled, "_D", 2) != 0) |
| 1637 | return NULL; |
| 1638 | |
| 1639 | string_init (&decl); |
| 1640 | |
| 1641 | if (strcmp (mangled, "_Dmain") == 0) |
| 1642 | { |
| 1643 | string_append (&decl, "D main"); |
| 1644 | } |
| 1645 | else |
| 1646 | { |
| 1647 | if (dlang_parse_mangle (&decl, mangled, dlang_top_level) == NULL) |
| 1648 | string_delete (&decl); |
| 1649 | } |
| 1650 | |
| 1651 | if (string_length (&decl) > 0) |
| 1652 | { |
| 1653 | string_need (&decl, 1); |
| 1654 | *(decl.p) = '\0'; |
| 1655 | demangled = decl.b; |
| 1656 | } |
| 1657 | |
| 1658 | return demangled; |
| 1659 | } |
| 1660 | |