Elliott Hughes | a0664b9 | 2017-04-18 17:46:52 -0700 | [diff] [blame^] | 1 | /* Demangler for the D programming language |
| 2 | Copyright 2014, 2015, 2016 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 | This file imports strtol for decoding mangled literals. */ |
| 32 | |
| 33 | #if 0 /* in valgrind */ |
| 34 | #ifdef HAVE_CONFIG_H |
| 35 | #include "config.h" |
| 36 | #endif |
| 37 | #endif /* ! in valgrind */ |
| 38 | |
| 39 | #if 0 /* in valgrind */ |
| 40 | #include "safe-ctype.h" |
| 41 | #endif /* ! in valgrind */ |
| 42 | |
| 43 | #if 0 /* in valgrind */ |
| 44 | #include <sys/types.h> |
| 45 | #include <string.h> |
| 46 | #include <stdio.h> |
| 47 | #endif /* ! in valgrind */ |
| 48 | |
| 49 | #if 0 /* in valgrind */ |
| 50 | #ifdef HAVE_STDLIB_H |
| 51 | #include <stdlib.h> |
| 52 | #else |
| 53 | extern long strtol (const char *nptr, char **endptr, int base); |
| 54 | #endif |
| 55 | #endif /* ! in valgrind */ |
| 56 | |
| 57 | #if 0 /* in valgrind */ |
| 58 | #include <demangle.h> |
| 59 | #include "libiberty.h" |
| 60 | #endif /* ! in valgrind */ |
| 61 | |
| 62 | #include "vg_libciface.h" |
| 63 | |
| 64 | #include "ansidecl.h" |
| 65 | #include "demangle.h" |
| 66 | #include "safe-ctype.h" |
| 67 | |
| 68 | /* A mini string-handling package */ |
| 69 | |
| 70 | typedef struct string /* Beware: these aren't required to be */ |
| 71 | { /* '\0' terminated. */ |
| 72 | char *b; /* pointer to start of string */ |
| 73 | char *p; /* pointer after last character */ |
| 74 | char *e; /* pointer after end of allocated space */ |
| 75 | } string; |
| 76 | |
| 77 | static void |
| 78 | string_need (string *s, int n) |
| 79 | { |
| 80 | int tem; |
| 81 | |
| 82 | if (s->b == NULL) |
| 83 | { |
| 84 | if (n < 32) |
| 85 | { |
| 86 | n = 32; |
| 87 | } |
| 88 | s->p = s->b = XNEWVEC (char, n); |
| 89 | s->e = s->b + n; |
| 90 | } |
| 91 | else if (s->e - s->p < n) |
| 92 | { |
| 93 | tem = s->p - s->b; |
| 94 | n += tem; |
| 95 | n *= 2; |
| 96 | s->b = XRESIZEVEC (char, s->b, n); |
| 97 | s->p = s->b + tem; |
| 98 | s->e = s->b + n; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | static void |
| 103 | string_delete (string *s) |
| 104 | { |
| 105 | if (s->b != NULL) |
| 106 | { |
| 107 | XDELETEVEC (s->b); |
| 108 | s->b = s->e = s->p = NULL; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | static void |
| 113 | string_init (string *s) |
| 114 | { |
| 115 | s->b = s->p = s->e = NULL; |
| 116 | } |
| 117 | |
| 118 | static int |
| 119 | string_length (string *s) |
| 120 | { |
| 121 | if (s->p == s->b) |
| 122 | { |
| 123 | return 0; |
| 124 | } |
| 125 | return s->p - s->b; |
| 126 | } |
| 127 | |
| 128 | static void |
| 129 | string_setlength (string *s, int n) |
| 130 | { |
| 131 | if (n - string_length (s) < 0) |
| 132 | { |
| 133 | s->p = s->b + n; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | static void |
| 138 | string_append (string *p, const char *s) |
| 139 | { |
| 140 | int n = strlen (s); |
| 141 | string_need (p, n); |
| 142 | memcpy (p->p, s, n); |
| 143 | p->p += n; |
| 144 | } |
| 145 | |
| 146 | static void |
| 147 | string_appendn (string *p, const char *s, int n) |
| 148 | { |
| 149 | if (n != 0) |
| 150 | { |
| 151 | string_need (p, n); |
| 152 | memcpy (p->p, s, n); |
| 153 | p->p += n; |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | static void |
| 158 | string_prependn (string *p, const char *s, int n) |
| 159 | { |
| 160 | char *q; |
| 161 | |
| 162 | if (n != 0) |
| 163 | { |
| 164 | string_need (p, n); |
| 165 | for (q = p->p - 1; q >= p->b; q--) |
| 166 | { |
| 167 | q[n] = q[0]; |
| 168 | } |
| 169 | memcpy (p->b, s, n); |
| 170 | p->p += n; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | static void |
| 175 | string_prepend (string *p, const char *s) |
| 176 | { |
| 177 | if (s != NULL && *s != '\0') |
| 178 | { |
| 179 | string_prependn (p, s, strlen (s)); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | /* What kinds of symbol we could be parsing. */ |
| 184 | enum dlang_symbol_kinds |
| 185 | { |
| 186 | /* Top-level symbol, needs it's type checked. */ |
| 187 | dlang_top_level, |
| 188 | /* Function symbol, needs it's type checked. */ |
| 189 | dlang_function, |
| 190 | /* Strongly typed name, such as for classes, structs and enums. */ |
| 191 | dlang_type_name, |
| 192 | /* Template identifier. */ |
| 193 | dlang_template_ident, |
| 194 | /* Template symbol parameter. */ |
| 195 | dlang_template_param |
| 196 | }; |
| 197 | |
| 198 | /* Prototypes for forward referenced functions */ |
| 199 | static const char *dlang_function_args (string *, const char *); |
| 200 | |
| 201 | static const char *dlang_type (string *, const char *); |
| 202 | |
| 203 | static const char *dlang_value (string *, const char *, const char *, char); |
| 204 | |
| 205 | static const char *dlang_parse_symbol (string *, const char *, |
| 206 | enum dlang_symbol_kinds); |
| 207 | |
| 208 | static const char *dlang_parse_tuple (string *, const char *); |
| 209 | |
| 210 | static const char *dlang_parse_template (string *, const char *, long); |
| 211 | |
| 212 | |
| 213 | /* Demangle the calling convention from MANGLED and append it to DECL. |
| 214 | Return the remaining string on success or NULL on failure. */ |
| 215 | static const char * |
| 216 | dlang_call_convention (string *decl, const char *mangled) |
| 217 | { |
| 218 | if (mangled == NULL || *mangled == '\0') |
| 219 | return NULL; |
| 220 | |
| 221 | switch (*mangled) |
| 222 | { |
| 223 | case 'F': /* (D) */ |
| 224 | mangled++; |
| 225 | break; |
| 226 | case 'U': /* (C) */ |
| 227 | mangled++; |
| 228 | string_append (decl, "extern(C) "); |
| 229 | break; |
| 230 | case 'W': /* (Windows) */ |
| 231 | mangled++; |
| 232 | string_append (decl, "extern(Windows) "); |
| 233 | break; |
| 234 | case 'V': /* (Pascal) */ |
| 235 | mangled++; |
| 236 | string_append (decl, "extern(Pascal) "); |
| 237 | break; |
| 238 | case 'R': /* (C++) */ |
| 239 | mangled++; |
| 240 | string_append (decl, "extern(C++) "); |
| 241 | break; |
| 242 | case 'Y': /* (Objective-C) */ |
| 243 | mangled++; |
| 244 | string_append (decl, "extern(Objective-C) "); |
| 245 | break; |
| 246 | default: |
| 247 | return NULL; |
| 248 | } |
| 249 | |
| 250 | return mangled; |
| 251 | } |
| 252 | |
| 253 | /* Extract the type modifiers from MANGLED and append them to DECL. |
| 254 | Returns the remaining signature on success or NULL on failure. */ |
| 255 | static const char * |
| 256 | dlang_type_modifiers (string *decl, const char *mangled) |
| 257 | { |
| 258 | if (mangled == NULL || *mangled == '\0') |
| 259 | return NULL; |
| 260 | |
| 261 | switch (*mangled) |
| 262 | { |
| 263 | case 'x': /* const */ |
| 264 | mangled++; |
| 265 | string_append (decl, " const"); |
| 266 | return mangled; |
| 267 | case 'y': /* immutable */ |
| 268 | mangled++; |
| 269 | string_append (decl, " immutable"); |
| 270 | return mangled; |
| 271 | case 'O': /* shared */ |
| 272 | mangled++; |
| 273 | string_append (decl, " shared"); |
| 274 | return dlang_type_modifiers (decl, mangled); |
| 275 | case 'N': |
| 276 | mangled++; |
| 277 | if (*mangled == 'g') /* wild */ |
| 278 | { |
| 279 | mangled++; |
| 280 | string_append (decl, " inout"); |
| 281 | return dlang_type_modifiers (decl, mangled); |
| 282 | } |
| 283 | else |
| 284 | return NULL; |
| 285 | |
| 286 | default: |
| 287 | return mangled; |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | /* Demangle the D function attributes from MANGLED and append it to DECL. |
| 292 | Return the remaining string on success or NULL on failure. */ |
| 293 | static const char * |
| 294 | dlang_attributes (string *decl, const char *mangled) |
| 295 | { |
| 296 | if (mangled == NULL || *mangled == '\0') |
| 297 | return NULL; |
| 298 | |
| 299 | while (*mangled == 'N') |
| 300 | { |
| 301 | mangled++; |
| 302 | switch (*mangled) |
| 303 | { |
| 304 | case 'a': /* pure */ |
| 305 | mangled++; |
| 306 | string_append (decl, "pure "); |
| 307 | continue; |
| 308 | case 'b': /* nothrow */ |
| 309 | mangled++; |
| 310 | string_append (decl, "nothrow "); |
| 311 | continue; |
| 312 | case 'c': /* ref */ |
| 313 | mangled++; |
| 314 | string_append (decl, "ref "); |
| 315 | continue; |
| 316 | case 'd': /* @property */ |
| 317 | mangled++; |
| 318 | string_append (decl, "@property "); |
| 319 | continue; |
| 320 | case 'e': /* @trusted */ |
| 321 | mangled++; |
| 322 | string_append (decl, "@trusted "); |
| 323 | continue; |
| 324 | case 'f': /* @safe */ |
| 325 | mangled++; |
| 326 | string_append (decl, "@safe "); |
| 327 | continue; |
| 328 | case 'g': |
| 329 | case 'h': |
| 330 | case 'k': |
| 331 | /* inout parameter is represented as 'Ng'. |
| 332 | vector parameter is represented as 'Nh'. |
| 333 | return paramenter is represented as 'Nk'. |
| 334 | If we see this, then we know we're really in the |
| 335 | parameter list. Rewind and break. */ |
| 336 | mangled--; |
| 337 | break; |
| 338 | case 'i': /* @nogc */ |
| 339 | mangled++; |
| 340 | string_append (decl, "@nogc "); |
| 341 | continue; |
| 342 | case 'j': /* return */ |
| 343 | mangled++; |
| 344 | string_append (decl, "return "); |
| 345 | continue; |
| 346 | |
| 347 | default: /* unknown attribute */ |
| 348 | return NULL; |
| 349 | } |
| 350 | break; |
| 351 | } |
| 352 | |
| 353 | return mangled; |
| 354 | } |
| 355 | |
| 356 | /* Demangle the function type from MANGLED and append it to DECL. |
| 357 | Return the remaining string on success or NULL on failure. */ |
| 358 | static const char * |
| 359 | dlang_function_type (string *decl, const char *mangled) |
| 360 | { |
| 361 | string attr, args, type; |
| 362 | size_t szattr, szargs, sztype; |
| 363 | |
| 364 | if (mangled == NULL || *mangled == '\0') |
| 365 | return NULL; |
| 366 | |
| 367 | /* The order of the mangled string is: |
| 368 | CallConvention FuncAttrs Arguments ArgClose Type |
| 369 | |
| 370 | The demangled string is re-ordered as: |
| 371 | CallConvention Type Arguments FuncAttrs |
| 372 | */ |
| 373 | string_init (&attr); |
| 374 | string_init (&args); |
| 375 | string_init (&type); |
| 376 | |
| 377 | /* Function call convention. */ |
| 378 | mangled = dlang_call_convention (decl, mangled); |
| 379 | |
| 380 | /* Function attributes. */ |
| 381 | mangled = dlang_attributes (&attr, mangled); |
| 382 | szattr = string_length (&attr); |
| 383 | |
| 384 | /* Function arguments. */ |
| 385 | mangled = dlang_function_args (&args, mangled); |
| 386 | szargs = string_length (&args); |
| 387 | |
| 388 | /* Function return type. */ |
| 389 | mangled = dlang_type (&type, mangled); |
| 390 | sztype = string_length (&type); |
| 391 | |
| 392 | /* Append to decl in order. */ |
| 393 | string_appendn (decl, type.b, sztype); |
| 394 | string_append (decl, "("); |
| 395 | string_appendn (decl, args.b, szargs); |
| 396 | string_append (decl, ") "); |
| 397 | string_appendn (decl, attr.b, szattr); |
| 398 | |
| 399 | string_delete (&attr); |
| 400 | string_delete (&args); |
| 401 | string_delete (&type); |
| 402 | return mangled; |
| 403 | } |
| 404 | |
| 405 | /* Demangle the argument list from MANGLED and append it to DECL. |
| 406 | Return the remaining string on success or NULL on failure. */ |
| 407 | static const char * |
| 408 | dlang_function_args (string *decl, const char *mangled) |
| 409 | { |
| 410 | size_t n = 0; |
| 411 | |
| 412 | while (mangled && *mangled != '\0') |
| 413 | { |
| 414 | switch (*mangled) |
| 415 | { |
| 416 | case 'X': /* (variadic T t...) style. */ |
| 417 | mangled++; |
| 418 | string_append (decl, "..."); |
| 419 | return mangled; |
| 420 | case 'Y': /* (variadic T t, ...) style. */ |
| 421 | mangled++; |
| 422 | if (n != 0) |
| 423 | string_append (decl, ", "); |
| 424 | string_append (decl, "..."); |
| 425 | return mangled; |
| 426 | case 'Z': /* Normal function. */ |
| 427 | mangled++; |
| 428 | return mangled; |
| 429 | } |
| 430 | |
| 431 | if (n++) |
| 432 | string_append (decl, ", "); |
| 433 | |
| 434 | if (*mangled == 'M') /* scope(T) */ |
| 435 | { |
| 436 | mangled++; |
| 437 | string_append (decl, "scope "); |
| 438 | } |
| 439 | |
| 440 | if (mangled[0] == 'N' && mangled[1] == 'k') /* return(T) */ |
| 441 | { |
| 442 | mangled += 2; |
| 443 | string_append (decl, "return "); |
| 444 | } |
| 445 | |
| 446 | switch (*mangled) |
| 447 | { |
| 448 | case 'J': /* out(T) */ |
| 449 | mangled++; |
| 450 | string_append (decl, "out "); |
| 451 | break; |
| 452 | case 'K': /* ref(T) */ |
| 453 | mangled++; |
| 454 | string_append (decl, "ref "); |
| 455 | break; |
| 456 | case 'L': /* lazy(T) */ |
| 457 | mangled++; |
| 458 | string_append (decl, "lazy "); |
| 459 | break; |
| 460 | } |
| 461 | mangled = dlang_type (decl, mangled); |
| 462 | } |
| 463 | |
| 464 | return mangled; |
| 465 | } |
| 466 | |
| 467 | /* Demangle the type from MANGLED and append it to DECL. |
| 468 | Return the remaining string on success or NULL on failure. */ |
| 469 | static const char * |
| 470 | dlang_type (string *decl, const char *mangled) |
| 471 | { |
| 472 | if (mangled == NULL || *mangled == '\0') |
| 473 | return NULL; |
| 474 | |
| 475 | switch (*mangled) |
| 476 | { |
| 477 | case 'O': /* shared(T) */ |
| 478 | mangled++; |
| 479 | string_append (decl, "shared("); |
| 480 | mangled = dlang_type (decl, mangled); |
| 481 | string_append (decl, ")"); |
| 482 | return mangled; |
| 483 | case 'x': /* const(T) */ |
| 484 | mangled++; |
| 485 | string_append (decl, "const("); |
| 486 | mangled = dlang_type (decl, mangled); |
| 487 | string_append (decl, ")"); |
| 488 | return mangled; |
| 489 | case 'y': /* immutable(T) */ |
| 490 | mangled++; |
| 491 | string_append (decl, "immutable("); |
| 492 | mangled = dlang_type (decl, mangled); |
| 493 | string_append (decl, ")"); |
| 494 | return mangled; |
| 495 | case 'N': |
| 496 | mangled++; |
| 497 | if (*mangled == 'g') /* wild(T) */ |
| 498 | { |
| 499 | mangled++; |
| 500 | string_append (decl, "inout("); |
| 501 | mangled = dlang_type (decl, mangled); |
| 502 | string_append (decl, ")"); |
| 503 | return mangled; |
| 504 | } |
| 505 | else if (*mangled == 'h') /* vector(T) */ |
| 506 | { |
| 507 | mangled++; |
| 508 | string_append (decl, "__vector("); |
| 509 | mangled = dlang_type (decl, mangled); |
| 510 | string_append (decl, ")"); |
| 511 | return mangled; |
| 512 | } |
| 513 | else |
| 514 | return NULL; |
| 515 | case 'A': /* dynamic array (T[]) */ |
| 516 | mangled++; |
| 517 | mangled = dlang_type (decl, mangled); |
| 518 | string_append (decl, "[]"); |
| 519 | return mangled; |
| 520 | case 'G': /* static array (T[N]) */ |
| 521 | { |
| 522 | const char *numptr; |
| 523 | size_t num = 0; |
| 524 | mangled++; |
| 525 | |
| 526 | numptr = mangled; |
| 527 | while (ISDIGIT (*mangled)) |
| 528 | { |
| 529 | num++; |
| 530 | mangled++; |
| 531 | } |
| 532 | mangled = dlang_type (decl, mangled); |
| 533 | string_append (decl, "["); |
| 534 | string_appendn (decl, numptr, num); |
| 535 | string_append (decl, "]"); |
| 536 | return mangled; |
| 537 | } |
| 538 | case 'H': /* associative array (T[T]) */ |
| 539 | { |
| 540 | string type; |
| 541 | size_t sztype; |
| 542 | mangled++; |
| 543 | |
| 544 | string_init (&type); |
| 545 | mangled = dlang_type (&type, mangled); |
| 546 | sztype = string_length (&type); |
| 547 | |
| 548 | mangled = dlang_type (decl, mangled); |
| 549 | string_append (decl, "["); |
| 550 | string_appendn (decl, type.b, sztype); |
| 551 | string_append (decl, "]"); |
| 552 | |
| 553 | string_delete (&type); |
| 554 | return mangled; |
| 555 | } |
| 556 | case 'P': /* pointer (T*) */ |
| 557 | mangled++; |
| 558 | /* Function pointer types don't include the trailing asterisk. */ |
| 559 | switch (*mangled) |
| 560 | { |
| 561 | case 'F': case 'U': case 'W': |
| 562 | case 'V': case 'R': case 'Y': |
| 563 | mangled = dlang_function_type (decl, mangled); |
| 564 | string_append (decl, "function"); |
| 565 | return mangled; |
| 566 | } |
| 567 | mangled = dlang_type (decl, mangled); |
| 568 | string_append (decl, "*"); |
| 569 | return mangled; |
| 570 | case 'I': /* ident T */ |
| 571 | case 'C': /* class T */ |
| 572 | case 'S': /* struct T */ |
| 573 | case 'E': /* enum T */ |
| 574 | case 'T': /* typedef T */ |
| 575 | mangled++; |
| 576 | return dlang_parse_symbol (decl, mangled, dlang_type_name); |
| 577 | case 'D': /* delegate T */ |
| 578 | { |
| 579 | string mods; |
| 580 | size_t szmods; |
| 581 | mangled++; |
| 582 | |
| 583 | string_init (&mods); |
| 584 | mangled = dlang_type_modifiers (&mods, mangled); |
| 585 | szmods = string_length (&mods); |
| 586 | |
| 587 | mangled = dlang_function_type (decl, mangled); |
| 588 | string_append (decl, "delegate"); |
| 589 | string_appendn (decl, mods.b, szmods); |
| 590 | |
| 591 | string_delete (&mods); |
| 592 | return mangled; |
| 593 | } |
| 594 | case 'B': /* tuple T */ |
| 595 | mangled++; |
| 596 | return dlang_parse_tuple (decl, mangled); |
| 597 | |
| 598 | /* Basic types */ |
| 599 | case 'n': |
| 600 | mangled++; |
| 601 | string_append (decl, "none"); |
| 602 | return mangled; |
| 603 | case 'v': |
| 604 | mangled++; |
| 605 | string_append (decl, "void"); |
| 606 | return mangled; |
| 607 | case 'g': |
| 608 | mangled++; |
| 609 | string_append (decl, "byte"); |
| 610 | return mangled; |
| 611 | case 'h': |
| 612 | mangled++; |
| 613 | string_append (decl, "ubyte"); |
| 614 | return mangled; |
| 615 | case 's': |
| 616 | mangled++; |
| 617 | string_append (decl, "short"); |
| 618 | return mangled; |
| 619 | case 't': |
| 620 | mangled++; |
| 621 | string_append (decl, "ushort"); |
| 622 | return mangled; |
| 623 | case 'i': |
| 624 | mangled++; |
| 625 | string_append (decl, "int"); |
| 626 | return mangled; |
| 627 | case 'k': |
| 628 | mangled++; |
| 629 | string_append (decl, "uint"); |
| 630 | return mangled; |
| 631 | case 'l': |
| 632 | mangled++; |
| 633 | string_append (decl, "long"); |
| 634 | return mangled; |
| 635 | case 'm': |
| 636 | mangled++; |
| 637 | string_append (decl, "ulong"); |
| 638 | return mangled; |
| 639 | case 'f': |
| 640 | mangled++; |
| 641 | string_append (decl, "float"); |
| 642 | return mangled; |
| 643 | case 'd': |
| 644 | mangled++; |
| 645 | string_append (decl, "double"); |
| 646 | return mangled; |
| 647 | case 'e': |
| 648 | mangled++; |
| 649 | string_append (decl, "real"); |
| 650 | return mangled; |
| 651 | |
| 652 | /* Imaginary and Complex types */ |
| 653 | case 'o': |
| 654 | mangled++; |
| 655 | string_append (decl, "ifloat"); |
| 656 | return mangled; |
| 657 | case 'p': |
| 658 | mangled++; |
| 659 | string_append (decl, "idouble"); |
| 660 | return mangled; |
| 661 | case 'j': |
| 662 | mangled++; |
| 663 | string_append (decl, "ireal"); |
| 664 | return mangled; |
| 665 | case 'q': |
| 666 | mangled++; |
| 667 | string_append (decl, "cfloat"); |
| 668 | return mangled; |
| 669 | case 'r': |
| 670 | mangled++; |
| 671 | string_append (decl, "cdouble"); |
| 672 | return mangled; |
| 673 | case 'c': |
| 674 | mangled++; |
| 675 | string_append (decl, "creal"); |
| 676 | return mangled; |
| 677 | |
| 678 | /* Other types */ |
| 679 | case 'b': |
| 680 | mangled++; |
| 681 | string_append (decl, "bool"); |
| 682 | return mangled; |
| 683 | case 'a': |
| 684 | mangled++; |
| 685 | string_append (decl, "char"); |
| 686 | return mangled; |
| 687 | case 'u': |
| 688 | mangled++; |
| 689 | string_append (decl, "wchar"); |
| 690 | return mangled; |
| 691 | case 'w': |
| 692 | mangled++; |
| 693 | string_append (decl, "dchar"); |
| 694 | return mangled; |
| 695 | case 'z': |
| 696 | mangled++; |
| 697 | switch (*mangled) |
| 698 | { |
| 699 | case 'i': |
| 700 | mangled++; |
| 701 | string_append (decl, "cent"); |
| 702 | return mangled; |
| 703 | case 'k': |
| 704 | mangled++; |
| 705 | string_append (decl, "ucent"); |
| 706 | return mangled; |
| 707 | } |
| 708 | return NULL; |
| 709 | |
| 710 | default: /* unhandled */ |
| 711 | return NULL; |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | /* Extract the identifier from MANGLED and append it to DECL. |
| 716 | Return the remaining string on success or NULL on failure. */ |
| 717 | static const char * |
| 718 | dlang_identifier (string *decl, const char *mangled, |
| 719 | enum dlang_symbol_kinds kind) |
| 720 | { |
| 721 | char *endptr; |
| 722 | long len; |
| 723 | |
| 724 | if (mangled == NULL || *mangled == '\0') |
| 725 | return NULL; |
| 726 | |
| 727 | len = strtol (mangled, &endptr, 10); |
| 728 | |
| 729 | if (endptr == NULL || len <= 0) |
| 730 | return NULL; |
| 731 | |
| 732 | /* In template parameter symbols, the first character of the mangled |
| 733 | name can be a digit. This causes ambiguity issues because the |
| 734 | digits of the two numbers are adjacent. */ |
| 735 | if (kind == dlang_template_param) |
| 736 | { |
| 737 | long psize = len; |
| 738 | char *pend; |
| 739 | int saved = string_length (decl); |
| 740 | |
| 741 | /* Work backwards until a match is found. */ |
| 742 | for (pend = endptr; endptr != NULL; pend--) |
| 743 | { |
| 744 | mangled = pend; |
| 745 | |
| 746 | /* Reached the beginning of the pointer to the name length, |
| 747 | try parsing the entire symbol. */ |
| 748 | if (psize == 0) |
| 749 | { |
| 750 | psize = len; |
| 751 | pend = endptr; |
| 752 | endptr = NULL; |
| 753 | } |
| 754 | |
| 755 | /* Check whether template parameter is a function with a valid |
| 756 | return type or an untyped identifier. */ |
| 757 | if (ISDIGIT (*mangled)) |
| 758 | mangled = dlang_parse_symbol (decl, mangled, dlang_template_ident); |
| 759 | else if (strncmp (mangled, "_D", 2) == 0) |
| 760 | { |
| 761 | mangled += 2; |
| 762 | mangled = dlang_parse_symbol (decl, mangled, dlang_function); |
| 763 | } |
| 764 | |
| 765 | /* Check for name length mismatch. */ |
| 766 | if (mangled && (mangled - pend) == psize) |
| 767 | return mangled; |
| 768 | |
| 769 | psize /= 10; |
| 770 | string_setlength (decl, saved); |
| 771 | } |
| 772 | |
| 773 | /* No match on any combinations. */ |
| 774 | return NULL; |
| 775 | } |
| 776 | else |
| 777 | { |
| 778 | if (strlen (endptr) < (size_t) len) |
| 779 | return NULL; |
| 780 | |
| 781 | mangled = endptr; |
| 782 | |
| 783 | /* May be a template instance. */ |
| 784 | if (len >= 5 && strncmp (mangled, "__T", 3) == 0) |
| 785 | { |
| 786 | /* Template symbol. */ |
| 787 | if (ISDIGIT (mangled[3]) && mangled[3] != '0') |
| 788 | return dlang_parse_template (decl, mangled, len); |
| 789 | |
| 790 | return NULL; |
| 791 | } |
| 792 | |
| 793 | switch (len) |
| 794 | { |
| 795 | case 6: |
| 796 | if (strncmp (mangled, "__ctor", len) == 0) |
| 797 | { |
| 798 | /* Constructor symbol for a class/struct. */ |
| 799 | string_append (decl, "this"); |
| 800 | mangled += len; |
| 801 | return mangled; |
| 802 | } |
| 803 | else if (strncmp (mangled, "__dtor", len) == 0) |
| 804 | { |
| 805 | /* Destructor symbol for a class/struct. */ |
| 806 | string_append (decl, "~this"); |
| 807 | mangled += len; |
| 808 | return mangled; |
| 809 | } |
| 810 | else if (strncmp (mangled, "__initZ", len+1) == 0) |
| 811 | { |
| 812 | /* The static initialiser for a given symbol. */ |
| 813 | string_append (decl, "init$"); |
| 814 | mangled += len; |
| 815 | return mangled; |
| 816 | } |
| 817 | else if (strncmp (mangled, "__vtblZ", len+1) == 0) |
| 818 | { |
| 819 | /* The vtable symbol for a given class. */ |
| 820 | string_prepend (decl, "vtable for "); |
| 821 | string_setlength (decl, string_length (decl) - 1); |
| 822 | mangled += len; |
| 823 | return mangled; |
| 824 | } |
| 825 | break; |
| 826 | |
| 827 | case 7: |
| 828 | if (strncmp (mangled, "__ClassZ", len+1) == 0) |
| 829 | { |
| 830 | /* The classinfo symbol for a given class. */ |
| 831 | string_prepend (decl, "ClassInfo for "); |
| 832 | string_setlength (decl, string_length (decl) - 1); |
| 833 | mangled += len; |
| 834 | return mangled; |
| 835 | } |
| 836 | break; |
| 837 | |
| 838 | case 10: |
| 839 | if (strncmp (mangled, "__postblitMFZ", len+3) == 0) |
| 840 | { |
| 841 | /* Postblit symbol for a struct. */ |
| 842 | string_append (decl, "this(this)"); |
| 843 | mangled += len + 3; |
| 844 | return mangled; |
| 845 | } |
| 846 | break; |
| 847 | |
| 848 | case 11: |
| 849 | if (strncmp (mangled, "__InterfaceZ", len+1) == 0) |
| 850 | { |
| 851 | /* The interface symbol for a given class. */ |
| 852 | string_prepend (decl, "Interface for "); |
| 853 | string_setlength (decl, string_length (decl) - 1); |
| 854 | mangled += len; |
| 855 | return mangled; |
| 856 | } |
| 857 | break; |
| 858 | |
| 859 | case 12: |
| 860 | if (strncmp (mangled, "__ModuleInfoZ", len+1) == 0) |
| 861 | { |
| 862 | /* The ModuleInfo symbol for a given module. */ |
| 863 | string_prepend (decl, "ModuleInfo for "); |
| 864 | string_setlength (decl, string_length (decl) - 1); |
| 865 | mangled += len; |
| 866 | return mangled; |
| 867 | } |
| 868 | break; |
| 869 | } |
| 870 | |
| 871 | string_appendn (decl, mangled, len); |
| 872 | mangled += len; |
| 873 | } |
| 874 | |
| 875 | return mangled; |
| 876 | } |
| 877 | |
| 878 | /* Extract the integer value from MANGLED and append it to DECL, |
| 879 | where TYPE is the type it should be represented as. |
| 880 | Return the remaining string on success or NULL on failure. */ |
| 881 | static const char * |
| 882 | dlang_parse_integer (string *decl, const char *mangled, char type) |
| 883 | { |
| 884 | if (type == 'a' || type == 'u' || type == 'w') |
| 885 | { |
| 886 | /* Parse character value. */ |
| 887 | char value[10]; |
| 888 | int pos = 10; |
| 889 | int width = 0; |
| 890 | char *endptr; |
| 891 | long val = strtol (mangled, &endptr, 10); |
| 892 | |
| 893 | if (endptr == NULL || val < 0) |
| 894 | return NULL; |
| 895 | |
| 896 | string_append (decl, "'"); |
| 897 | |
| 898 | if (type == 'a' && val >= 0x20 && val < 0x7F) |
| 899 | { |
| 900 | /* Represent as a character literal. */ |
| 901 | char c = (char) val; |
| 902 | string_appendn (decl, &c, 1); |
| 903 | } |
| 904 | else |
| 905 | { |
| 906 | /* Represent as a hexadecimal value. */ |
| 907 | switch (type) |
| 908 | { |
| 909 | case 'a': /* char */ |
| 910 | string_append (decl, "\\x"); |
| 911 | width = 2; |
| 912 | break; |
| 913 | case 'u': /* wchar */ |
| 914 | string_append (decl, "\\u"); |
| 915 | width = 4; |
| 916 | break; |
| 917 | case 'w': /* dchar */ |
| 918 | string_append (decl, "\\U"); |
| 919 | width = 8; |
| 920 | break; |
| 921 | } |
| 922 | |
| 923 | while (val > 0) |
| 924 | { |
| 925 | int digit = val % 16; |
| 926 | |
| 927 | if (digit < 10) |
| 928 | value[--pos] = (char)(digit + '0'); |
| 929 | else |
| 930 | value[--pos] = (char)((digit - 10) + 'a'); |
| 931 | |
| 932 | val /= 16; |
| 933 | width--; |
| 934 | } |
| 935 | |
| 936 | for (; width > 0; width--) |
| 937 | value[--pos] = '0'; |
| 938 | |
| 939 | string_appendn (decl, &(value[pos]), 10 - pos); |
| 940 | } |
| 941 | string_append (decl, "'"); |
| 942 | mangled = endptr; |
| 943 | } |
| 944 | else if (type == 'b') |
| 945 | { |
| 946 | /* Parse boolean value. */ |
| 947 | char *endptr; |
| 948 | long val = strtol (mangled, &endptr, 10); |
| 949 | |
| 950 | if (endptr == NULL || val < 0) |
| 951 | return NULL; |
| 952 | |
| 953 | string_append (decl, val ? "true" : "false"); |
| 954 | mangled = endptr; |
| 955 | } |
| 956 | else |
| 957 | { |
| 958 | /* Parse integer value. */ |
| 959 | const char *numptr = mangled; |
| 960 | size_t num = 0; |
| 961 | |
| 962 | while (ISDIGIT (*mangled)) |
| 963 | { |
| 964 | num++; |
| 965 | mangled++; |
| 966 | } |
| 967 | string_appendn (decl, numptr, num); |
| 968 | |
| 969 | /* Append suffix. */ |
| 970 | switch (type) |
| 971 | { |
| 972 | case 'h': /* ubyte */ |
| 973 | case 't': /* ushort */ |
| 974 | case 'k': /* uint */ |
| 975 | string_append (decl, "u"); |
| 976 | break; |
| 977 | case 'l': /* long */ |
| 978 | string_append (decl, "L"); |
| 979 | break; |
| 980 | case 'm': /* ulong */ |
| 981 | string_append (decl, "uL"); |
| 982 | break; |
| 983 | } |
| 984 | } |
| 985 | |
| 986 | return mangled; |
| 987 | } |
| 988 | |
| 989 | /* Extract the floating-point value from MANGLED and append it to DECL. |
| 990 | Return the remaining string on success or NULL on failure. */ |
| 991 | static const char * |
| 992 | dlang_parse_real (string *decl, const char *mangled) |
| 993 | { |
| 994 | char buffer[64]; |
| 995 | int len = 0; |
| 996 | |
| 997 | /* Handle NAN and +-INF. */ |
| 998 | if (strncmp (mangled, "NAN", 3) == 0) |
| 999 | { |
| 1000 | string_append (decl, "NaN"); |
| 1001 | mangled += 3; |
| 1002 | return mangled; |
| 1003 | } |
| 1004 | else if (strncmp (mangled, "INF", 3) == 0) |
| 1005 | { |
| 1006 | string_append (decl, "Inf"); |
| 1007 | mangled += 3; |
| 1008 | return mangled; |
| 1009 | } |
| 1010 | else if (strncmp (mangled, "NINF", 4) == 0) |
| 1011 | { |
| 1012 | string_append (decl, "-Inf"); |
| 1013 | mangled += 4; |
| 1014 | return mangled; |
| 1015 | } |
| 1016 | |
| 1017 | /* Hexadecimal prefix and leading bit. */ |
| 1018 | if (*mangled == 'N') |
| 1019 | { |
| 1020 | buffer[len++] = '-'; |
| 1021 | mangled++; |
| 1022 | } |
| 1023 | |
| 1024 | if (!ISXDIGIT (*mangled)) |
| 1025 | return NULL; |
| 1026 | |
| 1027 | buffer[len++] = '0'; |
| 1028 | buffer[len++] = 'x'; |
| 1029 | buffer[len++] = *mangled; |
| 1030 | buffer[len++] = '.'; |
| 1031 | mangled++; |
| 1032 | |
| 1033 | /* Significand. */ |
| 1034 | while (ISXDIGIT (*mangled)) |
| 1035 | { |
| 1036 | buffer[len++] = *mangled; |
| 1037 | mangled++; |
| 1038 | } |
| 1039 | |
| 1040 | /* Exponent. */ |
| 1041 | if (*mangled != 'P') |
| 1042 | return NULL; |
| 1043 | |
| 1044 | buffer[len++] = 'p'; |
| 1045 | mangled++; |
| 1046 | |
| 1047 | if (*mangled == 'N') |
| 1048 | { |
| 1049 | buffer[len++] = '-'; |
| 1050 | mangled++; |
| 1051 | } |
| 1052 | |
| 1053 | while (ISDIGIT (*mangled)) |
| 1054 | { |
| 1055 | buffer[len++] = *mangled; |
| 1056 | mangled++; |
| 1057 | } |
| 1058 | |
| 1059 | /* Write out the demangled hexadecimal, rather than trying to |
| 1060 | convert the buffer into a floating-point value. */ |
| 1061 | buffer[len] = '\0'; |
| 1062 | len = strlen (buffer); |
| 1063 | string_appendn (decl, buffer, len); |
| 1064 | return mangled; |
| 1065 | } |
| 1066 | |
| 1067 | /* Convert VAL from an ascii hexdigit to value. */ |
| 1068 | static char |
| 1069 | ascii2hex (char val) |
| 1070 | { |
| 1071 | if (val >= 'a' && val <= 'f') |
| 1072 | return (val - 'a' + 10); |
| 1073 | |
| 1074 | if (val >= 'A' && val <= 'F') |
| 1075 | return (val - 'A' + 10); |
| 1076 | |
| 1077 | if (val >= '0' && val <= '9') |
| 1078 | return (val - '0'); |
| 1079 | |
| 1080 | return 0; |
| 1081 | } |
| 1082 | |
| 1083 | /* Extract the string value from MANGLED and append it to DECL. |
| 1084 | Return the remaining string on success or NULL on failure. */ |
| 1085 | static const char * |
| 1086 | dlang_parse_string (string *decl, const char *mangled) |
| 1087 | { |
| 1088 | char type = *mangled; |
| 1089 | char *endptr; |
| 1090 | long len; |
| 1091 | |
| 1092 | mangled++; |
| 1093 | len = strtol (mangled, &endptr, 10); |
| 1094 | |
| 1095 | if (endptr == NULL || len < 0) |
| 1096 | return NULL; |
| 1097 | |
| 1098 | mangled = endptr; |
| 1099 | if (*mangled != '_') |
| 1100 | return NULL; |
| 1101 | |
| 1102 | mangled++; |
| 1103 | string_append (decl, "\""); |
| 1104 | while (len--) |
| 1105 | { |
| 1106 | if (ISXDIGIT (mangled[0]) && ISXDIGIT (mangled[1])) |
| 1107 | { |
| 1108 | char a = ascii2hex (mangled[0]); |
| 1109 | char b = ascii2hex (mangled[1]); |
| 1110 | char val = (a << 4) | b; |
| 1111 | |
| 1112 | /* Sanitize white and non-printable characters. */ |
| 1113 | switch (val) |
| 1114 | { |
| 1115 | case ' ': |
| 1116 | string_append (decl, " "); |
| 1117 | break; |
| 1118 | case '\t': |
| 1119 | string_append (decl, "\\t"); |
| 1120 | break; |
| 1121 | case '\n': |
| 1122 | string_append (decl, "\\n"); |
| 1123 | break; |
| 1124 | case '\r': |
| 1125 | string_append (decl, "\\r"); |
| 1126 | break; |
| 1127 | case '\f': |
| 1128 | string_append (decl, "\\f"); |
| 1129 | break; |
| 1130 | case '\v': |
| 1131 | string_append (decl, "\\v"); |
| 1132 | break; |
| 1133 | |
| 1134 | default: |
| 1135 | if (ISPRINT (val)) |
| 1136 | string_appendn (decl, &val, 1); |
| 1137 | else |
| 1138 | { |
| 1139 | string_append (decl, "\\x"); |
| 1140 | string_appendn (decl, mangled, 2); |
| 1141 | } |
| 1142 | } |
| 1143 | } |
| 1144 | else |
| 1145 | return NULL; |
| 1146 | |
| 1147 | mangled += 2; |
| 1148 | } |
| 1149 | string_append (decl, "\""); |
| 1150 | |
| 1151 | if (type != 'a') |
| 1152 | string_appendn (decl, &type, 1); |
| 1153 | |
| 1154 | return mangled; |
| 1155 | } |
| 1156 | |
| 1157 | /* Extract the static array value from MANGLED and append it to DECL. |
| 1158 | Return the remaining string on success or NULL on failure. */ |
| 1159 | static const char * |
| 1160 | dlang_parse_arrayliteral (string *decl, const char *mangled) |
| 1161 | { |
| 1162 | char *endptr; |
| 1163 | long elements = strtol (mangled, &endptr, 10); |
| 1164 | |
| 1165 | if (endptr == NULL || elements < 0) |
| 1166 | return NULL; |
| 1167 | |
| 1168 | mangled = endptr; |
| 1169 | string_append (decl, "["); |
| 1170 | while (elements--) |
| 1171 | { |
| 1172 | mangled = dlang_value (decl, mangled, NULL, '\0'); |
| 1173 | if (elements != 0) |
| 1174 | string_append (decl, ", "); |
| 1175 | } |
| 1176 | |
| 1177 | string_append (decl, "]"); |
| 1178 | return mangled; |
| 1179 | } |
| 1180 | |
| 1181 | /* Extract the associative array value from MANGLED and append it to DECL. |
| 1182 | Return the remaining string on success or NULL on failure. */ |
| 1183 | static const char * |
| 1184 | dlang_parse_assocarray (string *decl, const char *mangled) |
| 1185 | { |
| 1186 | char *endptr; |
| 1187 | long elements = strtol (mangled, &endptr, 10); |
| 1188 | |
| 1189 | if (endptr == NULL || elements < 0) |
| 1190 | return NULL; |
| 1191 | |
| 1192 | mangled = endptr; |
| 1193 | string_append (decl, "["); |
| 1194 | while (elements--) |
| 1195 | { |
| 1196 | mangled = dlang_value (decl, mangled, NULL, '\0'); |
| 1197 | string_append (decl, ":"); |
| 1198 | mangled = dlang_value (decl, mangled, NULL, '\0'); |
| 1199 | |
| 1200 | if (elements != 0) |
| 1201 | string_append (decl, ", "); |
| 1202 | } |
| 1203 | |
| 1204 | string_append (decl, "]"); |
| 1205 | return mangled; |
| 1206 | } |
| 1207 | |
| 1208 | /* Extract the struct literal value for NAME from MANGLED and append it to DECL. |
| 1209 | Return the remaining string on success or NULL on failure. */ |
| 1210 | static const char * |
| 1211 | dlang_parse_structlit (string *decl, const char *mangled, const char *name) |
| 1212 | { |
| 1213 | char *endptr; |
| 1214 | long args = strtol (mangled, &endptr, 10); |
| 1215 | |
| 1216 | if (endptr == NULL || args < 0) |
| 1217 | return NULL; |
| 1218 | |
| 1219 | mangled = endptr; |
| 1220 | if (name != NULL) |
| 1221 | string_append (decl, name); |
| 1222 | |
| 1223 | string_append (decl, "("); |
| 1224 | while (args--) |
| 1225 | { |
| 1226 | mangled = dlang_value (decl, mangled, NULL, '\0'); |
| 1227 | if (args != 0) |
| 1228 | string_append (decl, ", "); |
| 1229 | } |
| 1230 | |
| 1231 | string_append (decl, ")"); |
| 1232 | return mangled; |
| 1233 | } |
| 1234 | |
| 1235 | /* Extract the value from MANGLED and append it to DECL. |
| 1236 | Return the remaining string on success or NULL on failure. */ |
| 1237 | static const char * |
| 1238 | dlang_value (string *decl, const char *mangled, const char *name, char type) |
| 1239 | { |
| 1240 | if (mangled == NULL || *mangled == '\0') |
| 1241 | return NULL; |
| 1242 | |
| 1243 | switch (*mangled) |
| 1244 | { |
| 1245 | /* Null value. */ |
| 1246 | case 'n': |
| 1247 | mangled++; |
| 1248 | string_append (decl, "null"); |
| 1249 | break; |
| 1250 | |
| 1251 | /* Integral values. */ |
| 1252 | case 'N': |
| 1253 | mangled++; |
| 1254 | string_append (decl, "-"); |
| 1255 | mangled = dlang_parse_integer (decl, mangled, type); |
| 1256 | break; |
| 1257 | |
| 1258 | case 'i': |
| 1259 | mangled++; |
| 1260 | if (*mangled < '0' || *mangled > '9') |
| 1261 | return NULL; |
| 1262 | /* Fall through */ |
| 1263 | case '0': case '1': case '2': case '3': case '4': |
| 1264 | case '5': case '6': case '7': case '8': case '9': |
| 1265 | mangled = dlang_parse_integer (decl, mangled, type); |
| 1266 | break; |
| 1267 | |
| 1268 | /* Real value. */ |
| 1269 | case 'e': |
| 1270 | mangled++; |
| 1271 | mangled = dlang_parse_real (decl, mangled); |
| 1272 | break; |
| 1273 | |
| 1274 | /* Complex value. */ |
| 1275 | case 'c': |
| 1276 | mangled++; |
| 1277 | mangled = dlang_parse_real (decl, mangled); |
| 1278 | string_append (decl, "+"); |
| 1279 | if (mangled == NULL || *mangled != 'c') |
| 1280 | return NULL; |
| 1281 | mangled++; |
| 1282 | mangled = dlang_parse_real (decl, mangled); |
| 1283 | string_append (decl, "i"); |
| 1284 | break; |
| 1285 | |
| 1286 | /* String values. */ |
| 1287 | case 'a': /* UTF8 */ |
| 1288 | case 'w': /* UTF16 */ |
| 1289 | case 'd': /* UTF32 */ |
| 1290 | mangled = dlang_parse_string (decl, mangled); |
| 1291 | break; |
| 1292 | |
| 1293 | /* Array values. */ |
| 1294 | case 'A': |
| 1295 | mangled++; |
| 1296 | if (type == 'H') |
| 1297 | mangled = dlang_parse_assocarray (decl, mangled); |
| 1298 | else |
| 1299 | mangled = dlang_parse_arrayliteral (decl, mangled); |
| 1300 | break; |
| 1301 | |
| 1302 | /* Struct values. */ |
| 1303 | case 'S': |
| 1304 | mangled++; |
| 1305 | mangled = dlang_parse_structlit (decl, mangled, name); |
| 1306 | break; |
| 1307 | |
| 1308 | default: |
| 1309 | return NULL; |
| 1310 | } |
| 1311 | |
| 1312 | return mangled; |
| 1313 | } |
| 1314 | |
| 1315 | /* Extract the type modifiers from MANGLED and return the string |
| 1316 | length that it consumes in MANGLED on success or 0 on failure. */ |
| 1317 | static int |
| 1318 | dlang_type_modifier_p (const char *mangled) |
| 1319 | { |
| 1320 | int i; |
| 1321 | |
| 1322 | switch (*mangled) |
| 1323 | { |
| 1324 | case 'x': case 'y': |
| 1325 | return 1; |
| 1326 | |
| 1327 | case 'O': |
| 1328 | mangled++; |
| 1329 | i = dlang_type_modifier_p (mangled); |
| 1330 | return i + 1; |
| 1331 | |
| 1332 | case 'N': |
| 1333 | mangled++; |
| 1334 | if (*mangled == 'g') |
| 1335 | { |
| 1336 | mangled++; |
| 1337 | i = dlang_type_modifier_p (mangled); |
| 1338 | return i + 2; |
| 1339 | } |
| 1340 | } |
| 1341 | |
| 1342 | return 0; |
| 1343 | } |
| 1344 | |
| 1345 | /* Extract the function calling convention from MANGLED and |
| 1346 | return 1 on success or 0 on failure. */ |
| 1347 | static int |
| 1348 | dlang_call_convention_p (const char *mangled) |
| 1349 | { |
| 1350 | /* Prefix for functions needing 'this' */ |
| 1351 | if (*mangled == 'M') |
| 1352 | { |
| 1353 | mangled++; |
| 1354 | /* Also skip over any type modifiers. */ |
| 1355 | mangled += dlang_type_modifier_p (mangled); |
| 1356 | } |
| 1357 | |
| 1358 | switch (*mangled) |
| 1359 | { |
| 1360 | case 'F': case 'U': case 'V': |
| 1361 | case 'W': case 'R': case 'Y': |
| 1362 | return 1; |
| 1363 | |
| 1364 | default: |
| 1365 | return 0; |
| 1366 | } |
| 1367 | } |
| 1368 | |
| 1369 | /* Extract and demangle the symbol in MANGLED and append it to DECL. |
| 1370 | Returns the remaining signature on success or NULL on failure. */ |
| 1371 | static const char * |
| 1372 | dlang_parse_symbol (string *decl, const char *mangled, |
| 1373 | enum dlang_symbol_kinds kind) |
| 1374 | { |
| 1375 | int saved; |
| 1376 | size_t n = 0; |
| 1377 | do |
| 1378 | { |
| 1379 | if (n++) |
| 1380 | string_append (decl, "."); |
| 1381 | |
| 1382 | mangled = dlang_identifier (decl, mangled, kind); |
| 1383 | |
| 1384 | if (mangled && dlang_call_convention_p (mangled)) |
| 1385 | { |
| 1386 | string mods; |
| 1387 | const char *start = NULL; |
| 1388 | int checkpoint = 0; |
| 1389 | |
| 1390 | /* Skip over 'this' parameter. */ |
| 1391 | if (*mangled == 'M') |
| 1392 | mangled++; |
| 1393 | |
| 1394 | /* We have reached here because we expect an extern(Pascal) function. |
| 1395 | However this is so rare, that it is more likely a template value |
| 1396 | parameter. Since this can't be assumed, first attempt parsing |
| 1397 | the symbol as a function, and then back out on failure. */ |
| 1398 | if (*mangled == 'V') |
| 1399 | { |
| 1400 | start = mangled; |
| 1401 | checkpoint = string_length (decl); |
| 1402 | } |
| 1403 | |
| 1404 | /* Save the type modifiers for appending at the end. */ |
| 1405 | string_init (&mods); |
| 1406 | mangled = dlang_type_modifiers (&mods, mangled); |
| 1407 | |
| 1408 | /* Skip over calling convention and attributes in qualified name. */ |
| 1409 | saved = string_length (decl); |
| 1410 | mangled = dlang_call_convention (decl, mangled); |
| 1411 | mangled = dlang_attributes (decl, mangled); |
| 1412 | string_setlength (decl, saved); |
| 1413 | |
| 1414 | string_append (decl, "("); |
| 1415 | mangled = dlang_function_args (decl, mangled); |
| 1416 | string_append (decl, ")"); |
| 1417 | |
| 1418 | /* Add any const/immutable/shared modifier. */ |
| 1419 | string_appendn (decl, mods.b, string_length (&mods)); |
| 1420 | string_delete (&mods); |
| 1421 | |
| 1422 | if (mangled == NULL && checkpoint != 0) |
| 1423 | { |
| 1424 | mangled = start; |
| 1425 | string_setlength (decl, checkpoint); |
| 1426 | } |
| 1427 | } |
| 1428 | } |
| 1429 | while (mangled && ISDIGIT (*mangled)); |
| 1430 | |
| 1431 | /* Only top-level symbols or function template parameters have |
| 1432 | a type that needs checking. */ |
| 1433 | if (kind == dlang_top_level || kind == dlang_function) |
| 1434 | { |
| 1435 | /* Artificial symbols end with 'Z' and have no type. */ |
| 1436 | if (mangled && *mangled == 'Z') |
| 1437 | mangled++; |
| 1438 | else |
| 1439 | { |
| 1440 | saved = string_length (decl); |
| 1441 | mangled = dlang_type (decl, mangled); |
| 1442 | string_setlength (decl, saved); |
| 1443 | } |
| 1444 | |
| 1445 | /* Check that the entire symbol was successfully demangled. */ |
| 1446 | if (kind == dlang_top_level) |
| 1447 | { |
| 1448 | if (mangled == NULL || *mangled != '\0') |
| 1449 | return NULL; |
| 1450 | } |
| 1451 | } |
| 1452 | |
| 1453 | return mangled; |
| 1454 | } |
| 1455 | |
| 1456 | /* Demangle the tuple from MANGLED and append it to DECL. |
| 1457 | Return the remaining string on success or NULL on failure. */ |
| 1458 | static const char * |
| 1459 | dlang_parse_tuple (string *decl, const char *mangled) |
| 1460 | { |
| 1461 | char *endptr; |
| 1462 | long elements = strtol (mangled, &endptr, 10); |
| 1463 | |
| 1464 | if (endptr == NULL || elements < 0) |
| 1465 | return NULL; |
| 1466 | |
| 1467 | mangled = endptr; |
| 1468 | string_append (decl, "Tuple!("); |
| 1469 | |
| 1470 | while (elements--) |
| 1471 | { |
| 1472 | mangled = dlang_type (decl, mangled); |
| 1473 | if (elements != 0) |
| 1474 | string_append (decl, ", "); |
| 1475 | } |
| 1476 | |
| 1477 | string_append (decl, ")"); |
| 1478 | return mangled; |
| 1479 | } |
| 1480 | |
| 1481 | /* Demangle the argument list from MANGLED and append it to DECL. |
| 1482 | Return the remaining string on success or NULL on failure. */ |
| 1483 | static const char * |
| 1484 | dlang_template_args (string *decl, const char *mangled) |
| 1485 | { |
| 1486 | size_t n = 0; |
| 1487 | |
| 1488 | while (mangled && *mangled != '\0') |
| 1489 | { |
| 1490 | switch (*mangled) |
| 1491 | { |
| 1492 | case 'Z': /* End of parameter list. */ |
| 1493 | mangled++; |
| 1494 | return mangled; |
| 1495 | } |
| 1496 | |
| 1497 | if (n++) |
| 1498 | string_append (decl, ", "); |
| 1499 | |
| 1500 | /* Skip over specialised template prefix. */ |
| 1501 | if (*mangled == 'H') |
| 1502 | mangled++; |
| 1503 | |
| 1504 | switch (*mangled) |
| 1505 | { |
| 1506 | case 'S': /* Symbol parameter. */ |
| 1507 | mangled++; |
| 1508 | mangled = dlang_parse_symbol (decl, mangled, dlang_template_param); |
| 1509 | break; |
| 1510 | case 'T': /* Type parameter. */ |
| 1511 | mangled++; |
| 1512 | mangled = dlang_type (decl, mangled); |
| 1513 | break; |
| 1514 | case 'V': /* Value parameter. */ |
| 1515 | { |
| 1516 | string name; |
| 1517 | char type; |
| 1518 | |
| 1519 | /* Peek at the type. */ |
| 1520 | mangled++; |
| 1521 | type = *mangled; |
| 1522 | |
| 1523 | /* In the few instances where the type is actually desired in |
| 1524 | the output, it should precede the value from dlang_value. */ |
| 1525 | string_init (&name); |
| 1526 | mangled = dlang_type (&name, mangled); |
| 1527 | string_need (&name, 1); |
| 1528 | *(name.p) = '\0'; |
| 1529 | |
| 1530 | mangled = dlang_value (decl, mangled, name.b, type); |
| 1531 | string_delete (&name); |
| 1532 | break; |
| 1533 | } |
| 1534 | |
| 1535 | default: |
| 1536 | return NULL; |
| 1537 | } |
| 1538 | } |
| 1539 | |
| 1540 | return mangled; |
| 1541 | } |
| 1542 | |
| 1543 | /* Extract and demangle the template symbol in MANGLED, expected to |
| 1544 | be made up of LEN characters, and append it to DECL. |
| 1545 | Returns the remaining signature on success or NULL on failure. */ |
| 1546 | static const char * |
| 1547 | dlang_parse_template (string *decl, const char *mangled, long len) |
| 1548 | { |
| 1549 | const char *start = mangled; |
| 1550 | |
| 1551 | /* Template instance names have the types and values of its parameters |
| 1552 | encoded into it. |
| 1553 | |
| 1554 | TemplateInstanceName: |
| 1555 | Number __T LName TemplateArgs Z |
| 1556 | ^ |
| 1557 | The start pointer should be at the above location, and LEN should be |
| 1558 | the value of the decoded number. |
| 1559 | */ |
| 1560 | if (strncmp (mangled, "__T", 3) != 0) |
| 1561 | return NULL; |
| 1562 | |
| 1563 | mangled += 3; |
| 1564 | |
| 1565 | /* Template identifier. */ |
| 1566 | mangled = dlang_identifier (decl, mangled, dlang_template_ident); |
| 1567 | |
| 1568 | /* Template arguments. */ |
| 1569 | string_append (decl, "!("); |
| 1570 | mangled = dlang_template_args (decl, mangled); |
| 1571 | string_append (decl, ")"); |
| 1572 | |
| 1573 | /* Check for template name length mismatch. */ |
| 1574 | if (mangled && (mangled - start) != len) |
| 1575 | return NULL; |
| 1576 | |
| 1577 | return mangled; |
| 1578 | } |
| 1579 | |
| 1580 | /* Extract and demangle the symbol in MANGLED. Returns the demangled |
| 1581 | signature on success or NULL on failure. */ |
| 1582 | |
| 1583 | char * |
| 1584 | dlang_demangle (const char *mangled, int option ATTRIBUTE_UNUSED) |
| 1585 | { |
| 1586 | string decl; |
| 1587 | char *demangled = NULL; |
| 1588 | |
| 1589 | if (mangled == NULL || *mangled == '\0') |
| 1590 | return NULL; |
| 1591 | |
| 1592 | if (strncmp (mangled, "_D", 2) != 0) |
| 1593 | return NULL; |
| 1594 | |
| 1595 | string_init (&decl); |
| 1596 | |
| 1597 | if (strcmp (mangled, "_Dmain") == 0) |
| 1598 | { |
| 1599 | string_append (&decl, "D main"); |
| 1600 | } |
| 1601 | else |
| 1602 | { |
| 1603 | mangled += 2; |
| 1604 | |
| 1605 | if (dlang_parse_symbol (&decl, mangled, dlang_top_level) == NULL) |
| 1606 | string_delete (&decl); |
| 1607 | } |
| 1608 | |
| 1609 | if (string_length (&decl) > 0) |
| 1610 | { |
| 1611 | string_need (&decl, 1); |
| 1612 | *(decl.p) = '\0'; |
| 1613 | demangled = decl.b; |
| 1614 | } |
| 1615 | |
| 1616 | return demangled; |
| 1617 | } |
| 1618 | |