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43b1b9ed | 1 | /* Demangler for the D programming language |
0f4b8b31 | 2 | Copyright 2014, 2015, 2016 Free Software Foundation, Inc. |
43b1b9ed IB |
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 | ||
fd91ffb8 | 31 | This file imports strtol for decoding mangled literals. */ |
43b1b9ed IB |
32 | |
33 | #ifdef HAVE_CONFIG_H | |
34 | #include "config.h" | |
35 | #endif | |
36 | ||
37 | #include "safe-ctype.h" | |
38 | ||
39 | #include <sys/types.h> | |
40 | #include <string.h> | |
41 | #include <stdio.h> | |
42 | ||
43 | #ifdef HAVE_STDLIB_H | |
44 | #include <stdlib.h> | |
45 | #else | |
46 | extern long strtol (const char *nptr, char **endptr, int base); | |
43b1b9ed IB |
47 | #endif |
48 | ||
49 | #include <demangle.h> | |
50 | #include "libiberty.h" | |
51 | ||
52 | /* A mini string-handling package */ | |
53 | ||
54 | typedef struct string /* Beware: these aren't required to be */ | |
55 | { /* '\0' terminated. */ | |
56 | char *b; /* pointer to start of string */ | |
57 | char *p; /* pointer after last character */ | |
58 | char *e; /* pointer after end of allocated space */ | |
59 | } string; | |
60 | ||
61 | static void | |
62 | string_need (string *s, int n) | |
63 | { | |
64 | int tem; | |
65 | ||
66 | if (s->b == NULL) | |
67 | { | |
68 | if (n < 32) | |
69 | { | |
70 | n = 32; | |
71 | } | |
72 | s->p = s->b = XNEWVEC (char, n); | |
73 | s->e = s->b + n; | |
74 | } | |
75 | else if (s->e - s->p < n) | |
76 | { | |
77 | tem = s->p - s->b; | |
78 | n += tem; | |
79 | n *= 2; | |
80 | s->b = XRESIZEVEC (char, s->b, n); | |
81 | s->p = s->b + tem; | |
82 | s->e = s->b + n; | |
83 | } | |
84 | } | |
85 | ||
86 | static void | |
87 | string_delete (string *s) | |
88 | { | |
89 | if (s->b != NULL) | |
90 | { | |
91 | XDELETEVEC (s->b); | |
92 | s->b = s->e = s->p = NULL; | |
93 | } | |
94 | } | |
95 | ||
96 | static void | |
97 | string_init (string *s) | |
98 | { | |
99 | s->b = s->p = s->e = NULL; | |
100 | } | |
101 | ||
102 | static int | |
103 | string_length (string *s) | |
104 | { | |
105 | if (s->p == s->b) | |
106 | { | |
107 | return 0; | |
108 | } | |
109 | return s->p - s->b; | |
110 | } | |
111 | ||
112 | static void | |
113 | string_setlength (string *s, int n) | |
114 | { | |
115 | if (n - string_length (s) < 0) | |
116 | { | |
117 | s->p = s->b + n; | |
118 | } | |
119 | } | |
120 | ||
121 | static void | |
122 | string_append (string *p, const char *s) | |
123 | { | |
124 | int n = strlen (s); | |
125 | string_need (p, n); | |
126 | memcpy (p->p, s, n); | |
127 | p->p += n; | |
128 | } | |
129 | ||
130 | static void | |
131 | string_appendn (string *p, const char *s, int n) | |
132 | { | |
133 | if (n != 0) | |
134 | { | |
135 | string_need (p, n); | |
136 | memcpy (p->p, s, n); | |
137 | p->p += n; | |
138 | } | |
139 | } | |
140 | ||
141 | static void | |
142 | string_prependn (string *p, const char *s, int n) | |
143 | { | |
144 | char *q; | |
145 | ||
146 | if (n != 0) | |
147 | { | |
148 | string_need (p, n); | |
149 | for (q = p->p - 1; q >= p->b; q--) | |
150 | { | |
151 | q[n] = q[0]; | |
152 | } | |
153 | memcpy (p->b, s, n); | |
154 | p->p += n; | |
155 | } | |
156 | } | |
157 | ||
158 | static void | |
159 | string_prepend (string *p, const char *s) | |
160 | { | |
161 | if (s != NULL && *s != '\0') | |
162 | { | |
163 | string_prependn (p, s, strlen (s)); | |
164 | } | |
165 | } | |
166 | ||
7e865541 IB |
167 | /* What kinds of symbol we could be parsing. */ |
168 | enum dlang_symbol_kinds | |
169 | { | |
170 | /* Top-level symbol, needs it's type checked. */ | |
171 | dlang_top_level, | |
172 | /* Function symbol, needs it's type checked. */ | |
173 | dlang_function, | |
174 | /* Strongly typed name, such as for classes, structs and enums. */ | |
175 | dlang_type_name, | |
176 | /* Template identifier. */ | |
177 | dlang_template_ident, | |
178 | /* Template symbol parameter. */ | |
179 | dlang_template_param | |
180 | }; | |
181 | ||
43b1b9ed IB |
182 | /* Prototypes for forward referenced functions */ |
183 | static const char *dlang_function_args (string *, const char *); | |
184 | ||
185 | static const char *dlang_type (string *, const char *); | |
186 | ||
187 | static const char *dlang_value (string *, const char *, const char *, char); | |
188 | ||
7e865541 IB |
189 | static const char *dlang_parse_symbol (string *, const char *, |
190 | enum dlang_symbol_kinds); | |
43b1b9ed IB |
191 | |
192 | static const char *dlang_parse_tuple (string *, const char *); | |
193 | ||
194 | static const char *dlang_parse_template (string *, const char *, long); | |
195 | ||
196 | ||
197 | /* Demangle the calling convention from MANGLED and append it to DECL. | |
198 | Return the remaining string on success or NULL on failure. */ | |
199 | static const char * | |
200 | dlang_call_convention (string *decl, const char *mangled) | |
201 | { | |
202 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 203 | return NULL; |
43b1b9ed IB |
204 | |
205 | switch (*mangled) | |
206 | { | |
207 | case 'F': /* (D) */ | |
208 | mangled++; | |
209 | break; | |
210 | case 'U': /* (C) */ | |
211 | mangled++; | |
212 | string_append (decl, "extern(C) "); | |
213 | break; | |
214 | case 'W': /* (Windows) */ | |
215 | mangled++; | |
216 | string_append (decl, "extern(Windows) "); | |
217 | break; | |
218 | case 'V': /* (Pascal) */ | |
219 | mangled++; | |
220 | string_append (decl, "extern(Pascal) "); | |
221 | break; | |
222 | case 'R': /* (C++) */ | |
223 | mangled++; | |
224 | string_append (decl, "extern(C++) "); | |
225 | break; | |
226 | default: | |
227 | return NULL; | |
228 | } | |
229 | ||
230 | return mangled; | |
231 | } | |
232 | ||
fa66ced4 IB |
233 | /* Extract the type modifiers from MANGLED and append them to DECL. |
234 | Returns the remaining signature on success or NULL on failure. */ | |
235 | static const char * | |
236 | dlang_type_modifiers (string *decl, const char *mangled) | |
237 | { | |
238 | if (mangled == NULL || *mangled == '\0') | |
239 | return NULL; | |
240 | ||
241 | switch (*mangled) | |
242 | { | |
243 | case 'x': /* const */ | |
244 | mangled++; | |
245 | string_append (decl, " const"); | |
246 | return mangled; | |
247 | case 'y': /* immutable */ | |
248 | mangled++; | |
249 | string_append (decl, " immutable"); | |
250 | return mangled; | |
251 | case 'O': /* shared */ | |
252 | mangled++; | |
253 | string_append (decl, " shared"); | |
254 | return dlang_type_modifiers (decl, mangled); | |
255 | case 'N': | |
256 | mangled++; | |
257 | if (*mangled == 'g') /* wild */ | |
258 | { | |
259 | mangled++; | |
260 | string_append (decl, " inout"); | |
261 | return dlang_type_modifiers (decl, mangled); | |
262 | } | |
263 | else | |
264 | return NULL; | |
265 | ||
266 | default: | |
267 | return mangled; | |
268 | } | |
269 | } | |
270 | ||
43b1b9ed IB |
271 | /* Demangle the D function attributes from MANGLED and append it to DECL. |
272 | Return the remaining string on success or NULL on failure. */ | |
273 | static const char * | |
274 | dlang_attributes (string *decl, const char *mangled) | |
275 | { | |
276 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 277 | return NULL; |
43b1b9ed IB |
278 | |
279 | while (*mangled == 'N') | |
280 | { | |
281 | mangled++; | |
282 | switch (*mangled) | |
283 | { | |
284 | case 'a': /* pure */ | |
285 | mangled++; | |
286 | string_append (decl, "pure "); | |
287 | continue; | |
288 | case 'b': /* nothrow */ | |
289 | mangled++; | |
290 | string_append (decl, "nothrow "); | |
291 | continue; | |
292 | case 'c': /* ref */ | |
293 | mangled++; | |
294 | string_append (decl, "ref "); | |
295 | continue; | |
296 | case 'd': /* @property */ | |
297 | mangled++; | |
298 | string_append (decl, "@property "); | |
299 | continue; | |
300 | case 'e': /* @trusted */ | |
301 | mangled++; | |
302 | string_append (decl, "@trusted "); | |
303 | continue; | |
304 | case 'f': /* @safe */ | |
305 | mangled++; | |
306 | string_append (decl, "@safe "); | |
307 | continue; | |
308 | case 'g': | |
309 | case 'h': | |
7ce4461f | 310 | case 'k': |
43b1b9ed IB |
311 | /* inout parameter is represented as 'Ng'. |
312 | vector parameter is represented as 'Nh'. | |
7ce4461f | 313 | return paramenter is represented as 'Nk'. |
43b1b9ed IB |
314 | If we see this, then we know we're really in the |
315 | parameter list. Rewind and break. */ | |
316 | mangled--; | |
317 | break; | |
318 | case 'i': /* @nogc */ | |
319 | mangled++; | |
320 | string_append (decl, "@nogc "); | |
321 | continue; | |
7ce4461f IB |
322 | case 'j': /* return */ |
323 | mangled++; | |
324 | string_append (decl, "return "); | |
325 | continue; | |
326 | ||
327 | default: /* unknown attribute */ | |
328 | return NULL; | |
43b1b9ed IB |
329 | } |
330 | break; | |
331 | } | |
332 | ||
333 | return mangled; | |
334 | } | |
335 | ||
336 | /* Demangle the function type from MANGLED and append it to DECL. | |
337 | Return the remaining string on success or NULL on failure. */ | |
338 | static const char * | |
339 | dlang_function_type (string *decl, const char *mangled) | |
340 | { | |
341 | string attr, args, type; | |
342 | size_t szattr, szargs, sztype; | |
343 | ||
344 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 345 | return NULL; |
43b1b9ed IB |
346 | |
347 | /* The order of the mangled string is: | |
348 | CallConvention FuncAttrs Arguments ArgClose Type | |
349 | ||
350 | The demangled string is re-ordered as: | |
351 | CallConvention Type Arguments FuncAttrs | |
352 | */ | |
353 | string_init (&attr); | |
354 | string_init (&args); | |
355 | string_init (&type); | |
356 | ||
357 | /* Function call convention. */ | |
358 | mangled = dlang_call_convention (decl, mangled); | |
359 | ||
360 | /* Function attributes. */ | |
361 | mangled = dlang_attributes (&attr, mangled); | |
362 | szattr = string_length (&attr); | |
363 | ||
364 | /* Function arguments. */ | |
365 | mangled = dlang_function_args (&args, mangled); | |
366 | szargs = string_length (&args); | |
367 | ||
368 | /* Function return type. */ | |
369 | mangled = dlang_type (&type, mangled); | |
370 | sztype = string_length (&type); | |
371 | ||
372 | /* Append to decl in order. */ | |
373 | string_appendn (decl, type.b, sztype); | |
374 | string_append (decl, "("); | |
375 | string_appendn (decl, args.b, szargs); | |
376 | string_append (decl, ") "); | |
377 | string_appendn (decl, attr.b, szattr); | |
378 | ||
379 | string_delete (&attr); | |
380 | string_delete (&args); | |
381 | string_delete (&type); | |
382 | return mangled; | |
383 | } | |
384 | ||
385 | /* Demangle the argument list from MANGLED and append it to DECL. | |
386 | Return the remaining string on success or NULL on failure. */ | |
387 | static const char * | |
388 | dlang_function_args (string *decl, const char *mangled) | |
389 | { | |
390 | size_t n = 0; | |
391 | ||
392 | while (mangled && *mangled != '\0') | |
393 | { | |
394 | switch (*mangled) | |
395 | { | |
396 | case 'X': /* (variadic T t...) style. */ | |
397 | mangled++; | |
398 | string_append (decl, "..."); | |
399 | return mangled; | |
400 | case 'Y': /* (variadic T t, ...) style. */ | |
401 | mangled++; | |
402 | string_append (decl, ", ..."); | |
403 | return mangled; | |
404 | case 'Z': /* Normal function. */ | |
405 | mangled++; | |
406 | return mangled; | |
407 | } | |
408 | ||
409 | if (n++) | |
410 | string_append (decl, ", "); | |
411 | ||
412 | if (*mangled == 'M') /* scope(T) */ | |
413 | { | |
414 | mangled++; | |
415 | string_append (decl, "scope "); | |
416 | } | |
417 | ||
7ce4461f IB |
418 | if (mangled[0] == 'N' && mangled[1] == 'k') /* return(T) */ |
419 | { | |
420 | mangled += 2; | |
421 | string_append (decl, "return "); | |
422 | } | |
423 | ||
43b1b9ed IB |
424 | switch (*mangled) |
425 | { | |
426 | case 'J': /* out(T) */ | |
427 | mangled++; | |
428 | string_append (decl, "out "); | |
429 | break; | |
430 | case 'K': /* ref(T) */ | |
431 | mangled++; | |
432 | string_append (decl, "ref "); | |
433 | break; | |
434 | case 'L': /* lazy(T) */ | |
435 | mangled++; | |
436 | string_append (decl, "lazy "); | |
437 | break; | |
438 | } | |
439 | mangled = dlang_type (decl, mangled); | |
440 | } | |
441 | ||
442 | return mangled; | |
443 | } | |
444 | ||
445 | /* Demangle the type from MANGLED and append it to DECL. | |
446 | Return the remaining string on success or NULL on failure. */ | |
447 | static const char * | |
448 | dlang_type (string *decl, const char *mangled) | |
449 | { | |
450 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 451 | return NULL; |
43b1b9ed IB |
452 | |
453 | switch (*mangled) | |
454 | { | |
455 | case 'O': /* shared(T) */ | |
456 | mangled++; | |
457 | string_append (decl, "shared("); | |
458 | mangled = dlang_type (decl, mangled); | |
459 | string_append (decl, ")"); | |
460 | return mangled; | |
461 | case 'x': /* const(T) */ | |
462 | mangled++; | |
463 | string_append (decl, "const("); | |
464 | mangled = dlang_type (decl, mangled); | |
465 | string_append (decl, ")"); | |
466 | return mangled; | |
467 | case 'y': /* immutable(T) */ | |
468 | mangled++; | |
469 | string_append (decl, "immutable("); | |
470 | mangled = dlang_type (decl, mangled); | |
471 | string_append (decl, ")"); | |
472 | return mangled; | |
473 | case 'N': | |
474 | mangled++; | |
475 | if (*mangled == 'g') /* wild(T) */ | |
476 | { | |
477 | mangled++; | |
478 | string_append (decl, "inout("); | |
479 | mangled = dlang_type (decl, mangled); | |
480 | string_append (decl, ")"); | |
481 | return mangled; | |
482 | } | |
483 | else if (*mangled == 'h') /* vector(T) */ | |
484 | { | |
485 | mangled++; | |
486 | string_append (decl, "__vector("); | |
487 | mangled = dlang_type (decl, mangled); | |
488 | string_append (decl, ")"); | |
489 | return mangled; | |
490 | } | |
491 | else | |
492 | return NULL; | |
493 | case 'A': /* dynamic array (T[]) */ | |
494 | mangled++; | |
495 | mangled = dlang_type (decl, mangled); | |
496 | string_append (decl, "[]"); | |
497 | return mangled; | |
498 | case 'G': /* static array (T[N]) */ | |
499 | { | |
500 | const char *numptr; | |
501 | size_t num = 0; | |
502 | mangled++; | |
503 | ||
504 | numptr = mangled; | |
505 | while (ISDIGIT (*mangled)) | |
506 | { | |
507 | num++; | |
508 | mangled++; | |
509 | } | |
510 | mangled = dlang_type (decl, mangled); | |
511 | string_append (decl, "["); | |
512 | string_appendn (decl, numptr, num); | |
513 | string_append (decl, "]"); | |
514 | return mangled; | |
515 | } | |
516 | case 'H': /* associative array (T[T]) */ | |
517 | { | |
518 | string type; | |
519 | size_t sztype; | |
520 | mangled++; | |
521 | ||
522 | string_init (&type); | |
523 | mangled = dlang_type (&type, mangled); | |
524 | sztype = string_length (&type); | |
525 | ||
526 | mangled = dlang_type (decl, mangled); | |
527 | string_append (decl, "["); | |
528 | string_appendn (decl, type.b, sztype); | |
529 | string_append (decl, "]"); | |
530 | ||
531 | string_delete (&type); | |
532 | return mangled; | |
533 | } | |
534 | case 'P': /* pointer (T*) */ | |
535 | mangled++; | |
0f4b8b31 IB |
536 | /* Function pointer types don't include the trailing asterisk. */ |
537 | switch (*mangled) | |
538 | { | |
539 | case 'F': case 'U': case 'W': | |
540 | case 'V': case 'R': | |
541 | mangled = dlang_function_type (decl, mangled); | |
542 | string_append (decl, "function"); | |
543 | return mangled; | |
544 | } | |
43b1b9ed IB |
545 | mangled = dlang_type (decl, mangled); |
546 | string_append (decl, "*"); | |
547 | return mangled; | |
548 | case 'I': /* ident T */ | |
549 | case 'C': /* class T */ | |
550 | case 'S': /* struct T */ | |
551 | case 'E': /* enum T */ | |
552 | case 'T': /* typedef T */ | |
553 | mangled++; | |
7e865541 | 554 | return dlang_parse_symbol (decl, mangled, dlang_type_name); |
43b1b9ed | 555 | case 'D': /* delegate T */ |
fa66ced4 IB |
556 | { |
557 | string mods; | |
558 | size_t szmods; | |
43b1b9ed | 559 | mangled++; |
fa66ced4 IB |
560 | |
561 | string_init (&mods); | |
562 | mangled = dlang_type_modifiers (&mods, mangled); | |
563 | szmods = string_length (&mods); | |
564 | ||
43b1b9ed IB |
565 | mangled = dlang_function_type (decl, mangled); |
566 | string_append (decl, "delegate"); | |
fa66ced4 IB |
567 | string_appendn (decl, mods.b, szmods); |
568 | ||
569 | string_delete (&mods); | |
43b1b9ed | 570 | return mangled; |
fa66ced4 | 571 | } |
43b1b9ed IB |
572 | case 'B': /* tuple T */ |
573 | mangled++; | |
574 | return dlang_parse_tuple (decl, mangled); | |
575 | ||
43b1b9ed IB |
576 | /* Basic types */ |
577 | case 'n': | |
578 | mangled++; | |
579 | string_append (decl, "none"); | |
580 | return mangled; | |
581 | case 'v': | |
582 | mangled++; | |
583 | string_append (decl, "void"); | |
584 | return mangled; | |
585 | case 'g': | |
586 | mangled++; | |
587 | string_append (decl, "byte"); | |
588 | return mangled; | |
589 | case 'h': | |
590 | mangled++; | |
591 | string_append (decl, "ubyte"); | |
592 | return mangled; | |
593 | case 's': | |
594 | mangled++; | |
595 | string_append (decl, "short"); | |
596 | return mangled; | |
597 | case 't': | |
598 | mangled++; | |
599 | string_append (decl, "ushort"); | |
600 | return mangled; | |
601 | case 'i': | |
602 | mangled++; | |
603 | string_append (decl, "int"); | |
604 | return mangled; | |
605 | case 'k': | |
606 | mangled++; | |
607 | string_append (decl, "uint"); | |
608 | return mangled; | |
609 | case 'l': | |
610 | mangled++; | |
611 | string_append (decl, "long"); | |
612 | return mangled; | |
613 | case 'm': | |
614 | mangled++; | |
615 | string_append (decl, "ulong"); | |
616 | return mangled; | |
617 | case 'f': | |
618 | mangled++; | |
619 | string_append (decl, "float"); | |
620 | return mangled; | |
621 | case 'd': | |
622 | mangled++; | |
623 | string_append (decl, "double"); | |
624 | return mangled; | |
625 | case 'e': | |
626 | mangled++; | |
627 | string_append (decl, "real"); | |
628 | return mangled; | |
629 | ||
630 | /* Imaginary and Complex types */ | |
631 | case 'o': | |
632 | mangled++; | |
633 | string_append (decl, "ifloat"); | |
634 | return mangled; | |
635 | case 'p': | |
636 | mangled++; | |
637 | string_append (decl, "idouble"); | |
638 | return mangled; | |
639 | case 'j': | |
640 | mangled++; | |
641 | string_append (decl, "ireal"); | |
642 | return mangled; | |
643 | case 'q': | |
644 | mangled++; | |
645 | string_append (decl, "cfloat"); | |
646 | return mangled; | |
647 | case 'r': | |
648 | mangled++; | |
649 | string_append (decl, "cdouble"); | |
650 | return mangled; | |
651 | case 'c': | |
652 | mangled++; | |
653 | string_append (decl, "creal"); | |
654 | return mangled; | |
655 | ||
656 | /* Other types */ | |
657 | case 'b': | |
658 | mangled++; | |
659 | string_append (decl, "bool"); | |
660 | return mangled; | |
661 | case 'a': | |
662 | mangled++; | |
663 | string_append (decl, "char"); | |
664 | return mangled; | |
665 | case 'u': | |
666 | mangled++; | |
667 | string_append (decl, "wchar"); | |
668 | return mangled; | |
669 | case 'w': | |
670 | mangled++; | |
671 | string_append (decl, "dchar"); | |
672 | return mangled; | |
59251a73 IB |
673 | case 'z': |
674 | mangled++; | |
675 | switch (*mangled) | |
676 | { | |
677 | case 'i': | |
678 | mangled++; | |
679 | string_append (decl, "cent"); | |
680 | return mangled; | |
681 | case 'k': | |
682 | mangled++; | |
683 | string_append (decl, "ucent"); | |
684 | return mangled; | |
685 | } | |
686 | return NULL; | |
43b1b9ed IB |
687 | |
688 | default: /* unhandled */ | |
689 | return NULL; | |
690 | } | |
691 | } | |
692 | ||
693 | /* Extract the identifier from MANGLED and append it to DECL. | |
694 | Return the remaining string on success or NULL on failure. */ | |
695 | static const char * | |
7e865541 IB |
696 | dlang_identifier (string *decl, const char *mangled, |
697 | enum dlang_symbol_kinds kind) | |
43b1b9ed | 698 | { |
7e865541 IB |
699 | char *endptr; |
700 | long len; | |
701 | ||
43b1b9ed | 702 | if (mangled == NULL || *mangled == '\0') |
76b41cad | 703 | return NULL; |
43b1b9ed | 704 | |
7e865541 IB |
705 | len = strtol (mangled, &endptr, 10); |
706 | ||
707 | if (endptr == NULL || len <= 0) | |
708 | return NULL; | |
709 | ||
710 | /* In template parameter symbols, the first character of the mangled | |
711 | name can be a digit. This causes ambiguity issues because the | |
712 | digits of the two numbers are adjacent. */ | |
713 | if (kind == dlang_template_param) | |
43b1b9ed | 714 | { |
7e865541 IB |
715 | long psize = len; |
716 | char *pend; | |
717 | int saved = string_length (decl); | |
718 | ||
719 | /* Work backwards until a match is found. */ | |
720 | for (pend = endptr; endptr != NULL; pend--) | |
721 | { | |
722 | mangled = pend; | |
43b1b9ed | 723 | |
7e865541 IB |
724 | /* Reached the beginning of the pointer to the name length, |
725 | try parsing the entire symbol. */ | |
726 | if (psize == 0) | |
727 | { | |
728 | psize = len; | |
729 | pend = endptr; | |
730 | endptr = NULL; | |
731 | } | |
732 | ||
733 | /* Check whether template parameter is a function with a valid | |
734 | return type or an untyped identifier. */ | |
735 | if (ISDIGIT (*mangled)) | |
736 | mangled = dlang_parse_symbol (decl, mangled, dlang_template_ident); | |
737 | else if (strncmp (mangled, "_D", 2) == 0) | |
738 | { | |
739 | mangled += 2; | |
740 | mangled = dlang_parse_symbol (decl, mangled, dlang_function); | |
741 | } | |
742 | ||
743 | /* Check for name length mismatch. */ | |
744 | if (mangled && (mangled - pend) == psize) | |
745 | return mangled; | |
746 | ||
747 | psize /= 10; | |
748 | string_setlength (decl, saved); | |
749 | } | |
750 | ||
751 | /* No match on any combinations. */ | |
752 | return NULL; | |
753 | } | |
754 | else | |
755 | { | |
756 | if (strlen (endptr) < (size_t) len) | |
43b1b9ed IB |
757 | return NULL; |
758 | ||
759 | mangled = endptr; | |
760 | ||
761 | /* May be a template instance. */ | |
7e865541 | 762 | if (len >= 5 && strncmp (mangled, "__T", 3) == 0) |
43b1b9ed IB |
763 | { |
764 | /* Template symbol. */ | |
765 | if (ISDIGIT (mangled[3]) && mangled[3] != '0') | |
7e865541 | 766 | return dlang_parse_template (decl, mangled, len); |
43b1b9ed IB |
767 | |
768 | return NULL; | |
769 | } | |
770 | ||
7e865541 | 771 | switch (len) |
43b1b9ed | 772 | { |
5cc158e9 | 773 | case 6: |
7e865541 | 774 | if (strncmp (mangled, "__ctor", len) == 0) |
5cc158e9 IB |
775 | { |
776 | /* Constructor symbol for a class/struct. */ | |
777 | string_append (decl, "this"); | |
7e865541 | 778 | mangled += len; |
5cc158e9 IB |
779 | return mangled; |
780 | } | |
7e865541 | 781 | else if (strncmp (mangled, "__dtor", len) == 0) |
5cc158e9 IB |
782 | { |
783 | /* Destructor symbol for a class/struct. */ | |
784 | string_append (decl, "~this"); | |
7e865541 | 785 | mangled += len; |
5cc158e9 IB |
786 | return mangled; |
787 | } | |
7e865541 | 788 | else if (strncmp (mangled, "__initZ", len+1) == 0) |
5cc158e9 IB |
789 | { |
790 | /* The static initialiser for a given symbol. */ | |
791 | string_append (decl, "init$"); | |
7e865541 | 792 | mangled += len; |
5cc158e9 IB |
793 | return mangled; |
794 | } | |
7e865541 | 795 | else if (strncmp (mangled, "__vtblZ", len+1) == 0) |
5cc158e9 IB |
796 | { |
797 | /* The vtable symbol for a given class. */ | |
798 | string_prepend (decl, "vtable for "); | |
799 | string_setlength (decl, string_length (decl) - 1); | |
7e865541 | 800 | mangled += len; |
5cc158e9 IB |
801 | return mangled; |
802 | } | |
803 | break; | |
804 | ||
805 | case 7: | |
7e865541 | 806 | if (strncmp (mangled, "__ClassZ", len+1) == 0) |
5cc158e9 IB |
807 | { |
808 | /* The classinfo symbol for a given class. */ | |
809 | string_prepend (decl, "ClassInfo for "); | |
810 | string_setlength (decl, string_length (decl) - 1); | |
7e865541 | 811 | mangled += len; |
5cc158e9 IB |
812 | return mangled; |
813 | } | |
814 | break; | |
815 | ||
816 | case 10: | |
7e865541 | 817 | if (strncmp (mangled, "__postblitMFZ", len+3) == 0) |
5cc158e9 IB |
818 | { |
819 | /* Postblit symbol for a struct. */ | |
820 | string_append (decl, "this(this)"); | |
7e865541 | 821 | mangled += len + 3; |
5cc158e9 IB |
822 | return mangled; |
823 | } | |
824 | break; | |
825 | ||
826 | case 11: | |
7e865541 | 827 | if (strncmp (mangled, "__InterfaceZ", len+1) == 0) |
5cc158e9 IB |
828 | { |
829 | /* The interface symbol for a given class. */ | |
830 | string_prepend (decl, "Interface for "); | |
831 | string_setlength (decl, string_length (decl) - 1); | |
7e865541 | 832 | mangled += len; |
5cc158e9 IB |
833 | return mangled; |
834 | } | |
835 | break; | |
836 | ||
837 | case 12: | |
7e865541 | 838 | if (strncmp (mangled, "__ModuleInfoZ", len+1) == 0) |
5cc158e9 IB |
839 | { |
840 | /* The ModuleInfo symbol for a given module. */ | |
841 | string_prepend (decl, "ModuleInfo for "); | |
842 | string_setlength (decl, string_length (decl) - 1); | |
7e865541 | 843 | mangled += len; |
5cc158e9 IB |
844 | return mangled; |
845 | } | |
846 | break; | |
43b1b9ed IB |
847 | } |
848 | ||
7e865541 IB |
849 | string_appendn (decl, mangled, len); |
850 | mangled += len; | |
43b1b9ed | 851 | } |
43b1b9ed IB |
852 | |
853 | return mangled; | |
854 | } | |
855 | ||
856 | /* Extract the integer value from MANGLED and append it to DECL, | |
857 | where TYPE is the type it should be represented as. | |
858 | Return the remaining string on success or NULL on failure. */ | |
859 | static const char * | |
860 | dlang_parse_integer (string *decl, const char *mangled, char type) | |
861 | { | |
862 | if (type == 'a' || type == 'u' || type == 'w') | |
863 | { | |
864 | /* Parse character value. */ | |
865 | char value[10]; | |
866 | int pos = 10; | |
867 | int width = 0; | |
868 | char *endptr; | |
869 | long val = strtol (mangled, &endptr, 10); | |
870 | ||
871 | if (endptr == NULL || val < 0) | |
872 | return NULL; | |
873 | ||
874 | string_append (decl, "'"); | |
875 | ||
876 | if (type == 'a' && val >= 0x20 && val < 0x7F) | |
877 | { | |
878 | /* Represent as a character literal. */ | |
879 | char c = (char) val; | |
880 | string_appendn (decl, &c, 1); | |
881 | } | |
882 | else | |
883 | { | |
884 | /* Represent as a hexadecimal value. */ | |
885 | switch (type) | |
886 | { | |
887 | case 'a': /* char */ | |
888 | string_append (decl, "\\x"); | |
889 | width = 2; | |
890 | break; | |
891 | case 'u': /* wchar */ | |
892 | string_append (decl, "\\u"); | |
893 | width = 4; | |
894 | break; | |
895 | case 'w': /* dchar */ | |
896 | string_append (decl, "\\U"); | |
897 | width = 8; | |
898 | break; | |
899 | } | |
900 | ||
901 | while (val > 0) | |
902 | { | |
903 | int digit = val % 16; | |
904 | ||
905 | if (digit < 10) | |
906 | value[--pos] = (char)(digit + '0'); | |
907 | else | |
908 | value[--pos] = (char)((digit - 10) + 'a'); | |
909 | ||
910 | val /= 16; | |
911 | width--; | |
912 | } | |
913 | ||
914 | for (; width > 0; width--) | |
915 | value[--pos] = '0'; | |
916 | ||
917 | string_appendn (decl, &(value[pos]), 10 - pos); | |
918 | } | |
919 | string_append (decl, "'"); | |
920 | mangled = endptr; | |
921 | } | |
922 | else if (type == 'b') | |
923 | { | |
924 | /* Parse boolean value. */ | |
925 | char *endptr; | |
926 | long val = strtol (mangled, &endptr, 10); | |
927 | ||
928 | if (endptr == NULL || val < 0) | |
929 | return NULL; | |
930 | ||
931 | string_append (decl, val ? "true" : "false"); | |
932 | mangled = endptr; | |
933 | } | |
934 | else | |
935 | { | |
936 | /* Parse integer value. */ | |
937 | const char *numptr = mangled; | |
938 | size_t num = 0; | |
939 | ||
940 | while (ISDIGIT (*mangled)) | |
941 | { | |
942 | num++; | |
943 | mangled++; | |
944 | } | |
945 | string_appendn (decl, numptr, num); | |
946 | ||
947 | /* Append suffix. */ | |
948 | switch (type) | |
949 | { | |
950 | case 'h': /* ubyte */ | |
951 | case 't': /* ushort */ | |
952 | case 'k': /* uint */ | |
953 | string_append (decl, "u"); | |
954 | break; | |
955 | case 'l': /* long */ | |
956 | string_append (decl, "L"); | |
957 | break; | |
958 | case 'm': /* ulong */ | |
959 | string_append (decl, "uL"); | |
960 | break; | |
961 | } | |
962 | } | |
963 | ||
964 | return mangled; | |
965 | } | |
966 | ||
967 | /* Extract the floating-point value from MANGLED and append it to DECL. | |
968 | Return the remaining string on success or NULL on failure. */ | |
969 | static const char * | |
970 | dlang_parse_real (string *decl, const char *mangled) | |
971 | { | |
972 | char buffer[64]; | |
973 | int len = 0; | |
43b1b9ed IB |
974 | |
975 | /* Handle NAN and +-INF. */ | |
976 | if (strncmp (mangled, "NAN", 3) == 0) | |
977 | { | |
978 | string_append (decl, "NaN"); | |
979 | mangled += 3; | |
980 | return mangled; | |
981 | } | |
982 | else if (strncmp (mangled, "INF", 3) == 0) | |
983 | { | |
984 | string_append (decl, "Inf"); | |
985 | mangled += 3; | |
986 | return mangled; | |
987 | } | |
988 | else if (strncmp (mangled, "NINF", 4) == 0) | |
989 | { | |
990 | string_append (decl, "-Inf"); | |
991 | mangled += 4; | |
992 | return mangled; | |
993 | } | |
994 | ||
995 | /* Hexadecimal prefix and leading bit. */ | |
996 | if (*mangled == 'N') | |
997 | { | |
998 | buffer[len++] = '-'; | |
999 | mangled++; | |
1000 | } | |
1001 | ||
1002 | if (!ISXDIGIT (*mangled)) | |
1003 | return NULL; | |
1004 | ||
1005 | buffer[len++] = '0'; | |
1006 | buffer[len++] = 'x'; | |
1007 | buffer[len++] = *mangled; | |
1008 | buffer[len++] = '.'; | |
1009 | mangled++; | |
1010 | ||
1011 | /* Significand. */ | |
1012 | while (ISXDIGIT (*mangled)) | |
1013 | { | |
1014 | buffer[len++] = *mangled; | |
1015 | mangled++; | |
1016 | } | |
1017 | ||
1018 | /* Exponent. */ | |
1019 | if (*mangled != 'P') | |
1020 | return NULL; | |
1021 | ||
1022 | buffer[len++] = 'p'; | |
1023 | mangled++; | |
1024 | ||
1025 | if (*mangled == 'N') | |
1026 | { | |
1027 | buffer[len++] = '-'; | |
1028 | mangled++; | |
1029 | } | |
1030 | ||
1031 | while (ISDIGIT (*mangled)) | |
1032 | { | |
1033 | buffer[len++] = *mangled; | |
1034 | mangled++; | |
1035 | } | |
1036 | ||
fd91ffb8 IB |
1037 | /* Write out the demangled hexadecimal, rather than trying to |
1038 | convert the buffer into a floating-point value. */ | |
43b1b9ed | 1039 | buffer[len] = '\0'; |
fd91ffb8 | 1040 | len = strlen (buffer); |
43b1b9ed IB |
1041 | string_appendn (decl, buffer, len); |
1042 | return mangled; | |
1043 | } | |
1044 | ||
1045 | /* Convert VAL from an ascii hexdigit to value. */ | |
1046 | static char | |
1047 | ascii2hex (char val) | |
1048 | { | |
1049 | if (val >= 'a' && val <= 'f') | |
1050 | return (val - 'a' + 10); | |
1051 | ||
1052 | if (val >= 'A' && val <= 'F') | |
1053 | return (val - 'A' + 10); | |
1054 | ||
1055 | if (val >= '0' && val <= '9') | |
1056 | return (val - '0'); | |
1057 | ||
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | /* Extract the string value from MANGLED and append it to DECL. | |
1062 | Return the remaining string on success or NULL on failure. */ | |
1063 | static const char * | |
1064 | dlang_parse_string (string *decl, const char *mangled) | |
1065 | { | |
1066 | char type = *mangled; | |
1067 | char *endptr; | |
1068 | long len; | |
1069 | ||
1070 | mangled++; | |
1071 | len = strtol (mangled, &endptr, 10); | |
1072 | ||
1073 | if (endptr == NULL || len < 0) | |
1074 | return NULL; | |
1075 | ||
1076 | mangled = endptr; | |
1077 | if (*mangled != '_') | |
1078 | return NULL; | |
1079 | ||
1080 | mangled++; | |
1081 | string_append (decl, "\""); | |
1082 | while (len--) | |
1083 | { | |
1084 | if (ISXDIGIT (mangled[0]) && ISXDIGIT (mangled[1])) | |
1085 | { | |
1086 | char a = ascii2hex (mangled[0]); | |
1087 | char b = ascii2hex (mangled[1]); | |
1088 | char val = (a << 4) | b; | |
eb058b7d IB |
1089 | |
1090 | /* Sanitize white and non-printable characters. */ | |
1091 | switch (val) | |
1092 | { | |
1093 | case ' ': | |
1094 | string_append (decl, " "); | |
1095 | break; | |
1096 | case '\t': | |
1097 | string_append (decl, "\\t"); | |
1098 | break; | |
1099 | case '\n': | |
1100 | string_append (decl, "\\n"); | |
1101 | break; | |
1102 | case '\r': | |
1103 | string_append (decl, "\\r"); | |
1104 | break; | |
1105 | case '\f': | |
1106 | string_append (decl, "\\f"); | |
1107 | break; | |
1108 | case '\v': | |
1109 | string_append (decl, "\\v"); | |
1110 | break; | |
1111 | ||
1112 | default: | |
1113 | if (ISPRINT (val)) | |
1114 | string_appendn (decl, &val, 1); | |
1115 | else | |
1116 | { | |
1117 | string_append (decl, "\\x"); | |
1118 | string_appendn (decl, mangled, 2); | |
1119 | } | |
1120 | } | |
43b1b9ed IB |
1121 | } |
1122 | else | |
1123 | return NULL; | |
1124 | ||
1125 | mangled += 2; | |
1126 | } | |
1127 | string_append (decl, "\""); | |
1128 | ||
1129 | if (type != 'a') | |
1130 | string_appendn (decl, &type, 1); | |
1131 | ||
1132 | return mangled; | |
1133 | } | |
1134 | ||
1135 | /* Extract the static array value from MANGLED and append it to DECL. | |
1136 | Return the remaining string on success or NULL on failure. */ | |
1137 | static const char * | |
1138 | dlang_parse_arrayliteral (string *decl, const char *mangled) | |
1139 | { | |
1140 | char *endptr; | |
1141 | long elements = strtol (mangled, &endptr, 10); | |
1142 | ||
1143 | if (endptr == NULL || elements < 0) | |
1144 | return NULL; | |
1145 | ||
1146 | mangled = endptr; | |
1147 | string_append (decl, "["); | |
1148 | while (elements--) | |
1149 | { | |
1150 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1151 | if (elements != 0) | |
1152 | string_append (decl, ", "); | |
1153 | } | |
1154 | ||
1155 | string_append (decl, "]"); | |
1156 | return mangled; | |
1157 | } | |
1158 | ||
1159 | /* Extract the associative array value from MANGLED and append it to DECL. | |
1160 | Return the remaining string on success or NULL on failure. */ | |
1161 | static const char * | |
1162 | dlang_parse_assocarray (string *decl, const char *mangled) | |
1163 | { | |
1164 | char *endptr; | |
1165 | long elements = strtol (mangled, &endptr, 10); | |
1166 | ||
1167 | if (endptr == NULL || elements < 0) | |
1168 | return NULL; | |
1169 | ||
1170 | mangled = endptr; | |
1171 | string_append (decl, "["); | |
1172 | while (elements--) | |
1173 | { | |
1174 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1175 | string_append (decl, ":"); | |
1176 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1177 | ||
1178 | if (elements != 0) | |
1179 | string_append (decl, ", "); | |
1180 | } | |
1181 | ||
1182 | string_append (decl, "]"); | |
1183 | return mangled; | |
1184 | } | |
1185 | ||
1186 | /* Extract the struct literal value for NAME from MANGLED and append it to DECL. | |
1187 | Return the remaining string on success or NULL on failure. */ | |
1188 | static const char * | |
1189 | dlang_parse_structlit (string *decl, const char *mangled, const char *name) | |
1190 | { | |
1191 | char *endptr; | |
1192 | long args = strtol (mangled, &endptr, 10); | |
1193 | ||
1194 | if (endptr == NULL || args < 0) | |
1195 | return NULL; | |
1196 | ||
1197 | mangled = endptr; | |
1198 | if (name != NULL) | |
1199 | string_append (decl, name); | |
1200 | ||
1201 | string_append (decl, "("); | |
1202 | while (args--) | |
1203 | { | |
1204 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1205 | if (args != 0) | |
1206 | string_append (decl, ", "); | |
1207 | } | |
1208 | ||
1209 | string_append (decl, ")"); | |
1210 | return mangled; | |
1211 | } | |
1212 | ||
1213 | /* Extract the value from MANGLED and append it to DECL. | |
1214 | Return the remaining string on success or NULL on failure. */ | |
1215 | static const char * | |
1216 | dlang_value (string *decl, const char *mangled, const char *name, char type) | |
1217 | { | |
1218 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 1219 | return NULL; |
43b1b9ed IB |
1220 | |
1221 | switch (*mangled) | |
1222 | { | |
1223 | /* Null value. */ | |
1224 | case 'n': | |
1225 | mangled++; | |
1226 | string_append (decl, "null"); | |
1227 | break; | |
1228 | ||
1229 | /* Integral values. */ | |
1230 | case 'N': | |
1231 | mangled++; | |
1232 | string_append (decl, "-"); | |
1233 | mangled = dlang_parse_integer (decl, mangled, type); | |
1234 | break; | |
1235 | ||
1236 | case 'i': | |
1237 | mangled++; | |
1238 | if (*mangled < '0' || *mangled > '9') | |
1239 | return NULL; | |
1240 | /* Fall through */ | |
1241 | case '0': case '1': case '2': case '3': case '4': | |
1242 | case '5': case '6': case '7': case '8': case '9': | |
1243 | mangled = dlang_parse_integer (decl, mangled, type); | |
1244 | break; | |
1245 | ||
1246 | /* Real value. */ | |
1247 | case 'e': | |
1248 | mangled++; | |
1249 | mangled = dlang_parse_real (decl, mangled); | |
1250 | break; | |
1251 | ||
1252 | /* Complex value. */ | |
1253 | case 'c': | |
1254 | mangled++; | |
1255 | mangled = dlang_parse_real (decl, mangled); | |
1256 | string_append (decl, "+"); | |
1257 | if (mangled == NULL || *mangled != 'c') | |
1258 | return NULL; | |
1259 | mangled++; | |
1260 | mangled = dlang_parse_real (decl, mangled); | |
1261 | string_append (decl, "i"); | |
1262 | break; | |
1263 | ||
1264 | /* String values. */ | |
1265 | case 'a': /* UTF8 */ | |
1266 | case 'w': /* UTF16 */ | |
1267 | case 'd': /* UTF32 */ | |
1268 | mangled = dlang_parse_string (decl, mangled); | |
1269 | break; | |
1270 | ||
1271 | /* Array values. */ | |
1272 | case 'A': | |
1273 | mangled++; | |
1274 | if (type == 'H') | |
1275 | mangled = dlang_parse_assocarray (decl, mangled); | |
1276 | else | |
1277 | mangled = dlang_parse_arrayliteral (decl, mangled); | |
1278 | break; | |
1279 | ||
1280 | /* Struct values. */ | |
1281 | case 'S': | |
1282 | mangled++; | |
1283 | mangled = dlang_parse_structlit (decl, mangled, name); | |
1284 | break; | |
1285 | ||
1286 | default: | |
1287 | return NULL; | |
1288 | } | |
1289 | ||
1290 | return mangled; | |
1291 | } | |
1292 | ||
fa66ced4 IB |
1293 | /* Extract the type modifiers from MANGLED and return the string |
1294 | length that it consumes in MANGLED on success or 0 on failure. */ | |
43b1b9ed | 1295 | static int |
fa66ced4 | 1296 | dlang_type_modifier_p (const char *mangled) |
43b1b9ed | 1297 | { |
fa66ced4 | 1298 | int i; |
43b1b9ed IB |
1299 | |
1300 | switch (*mangled) | |
1301 | { | |
fa66ced4 | 1302 | case 'x': case 'y': |
43b1b9ed IB |
1303 | return 1; |
1304 | ||
fa66ced4 IB |
1305 | case 'O': |
1306 | mangled++; | |
1307 | i = dlang_type_modifier_p (mangled); | |
1308 | return i + 1; | |
43b1b9ed | 1309 | |
fa66ced4 IB |
1310 | case 'N': |
1311 | mangled++; | |
1312 | if (*mangled == 'g') | |
43b1b9ed | 1313 | { |
fa66ced4 IB |
1314 | mangled++; |
1315 | i = dlang_type_modifier_p (mangled); | |
1316 | return i + 2; | |
43b1b9ed | 1317 | } |
fa66ced4 IB |
1318 | } |
1319 | ||
1320 | return 0; | |
1321 | } | |
1322 | ||
1323 | /* Extract the function calling convention from MANGLED and | |
1324 | return 1 on success or 0 on failure. */ | |
1325 | static int | |
1326 | dlang_call_convention_p (const char *mangled) | |
1327 | { | |
1328 | /* Prefix for functions needing 'this' */ | |
1329 | if (*mangled == 'M') | |
1330 | { | |
1331 | mangled++; | |
1332 | /* Also skip over any type modifiers. */ | |
1333 | mangled += dlang_type_modifier_p (mangled); | |
1334 | } | |
1335 | ||
1336 | switch (*mangled) | |
1337 | { | |
1338 | case 'F': case 'U': case 'V': | |
1339 | case 'W': case 'R': | |
1340 | return 1; | |
43b1b9ed IB |
1341 | |
1342 | default: | |
1343 | return 0; | |
1344 | } | |
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 * | |
7e865541 IB |
1350 | dlang_parse_symbol (string *decl, const char *mangled, |
1351 | enum dlang_symbol_kinds kind) | |
43b1b9ed | 1352 | { |
7e865541 | 1353 | int saved; |
43b1b9ed IB |
1354 | size_t n = 0; |
1355 | do | |
1356 | { | |
1357 | if (n++) | |
1358 | string_append (decl, "."); | |
1359 | ||
7e865541 | 1360 | mangled = dlang_identifier (decl, mangled, kind); |
43b1b9ed IB |
1361 | |
1362 | if (mangled && dlang_call_convention_p (mangled)) | |
1363 | { | |
fa66ced4 | 1364 | string mods; |
7e865541 IB |
1365 | const char *start = NULL; |
1366 | int checkpoint = 0; | |
43b1b9ed IB |
1367 | |
1368 | /* Skip over 'this' parameter. */ | |
1369 | if (*mangled == 'M') | |
fa66ced4 IB |
1370 | mangled++; |
1371 | ||
7e865541 IB |
1372 | /* We have reached here because we expect an extern(Pascal) function. |
1373 | However this is so rare, that it is more likely a template value | |
1374 | parameter. Since this can't be assumed, first attempt parsing | |
1375 | the symbol as a function, and then back out on failure. */ | |
1376 | if (*mangled == 'V') | |
1377 | { | |
1378 | start = mangled; | |
1379 | checkpoint = string_length (decl); | |
1380 | } | |
1381 | ||
fa66ced4 IB |
1382 | /* Save the type modifiers for appending at the end. */ |
1383 | string_init (&mods); | |
1384 | mangled = dlang_type_modifiers (&mods, mangled); | |
43b1b9ed IB |
1385 | |
1386 | /* Skip over calling convention and attributes in qualified name. */ | |
1387 | saved = string_length (decl); | |
1388 | mangled = dlang_call_convention (decl, mangled); | |
1389 | mangled = dlang_attributes (decl, mangled); | |
1390 | string_setlength (decl, saved); | |
1391 | ||
1392 | string_append (decl, "("); | |
1393 | mangled = dlang_function_args (decl, mangled); | |
1394 | string_append (decl, ")"); | |
1395 | ||
fa66ced4 IB |
1396 | /* Add any const/immutable/shared modifier. */ |
1397 | string_appendn (decl, mods.b, string_length (&mods)); | |
1398 | string_delete (&mods); | |
7e865541 IB |
1399 | |
1400 | if (mangled == NULL && checkpoint != 0) | |
1401 | { | |
1402 | mangled = start; | |
1403 | string_setlength (decl, checkpoint); | |
1404 | } | |
43b1b9ed IB |
1405 | } |
1406 | } | |
1407 | while (mangled && ISDIGIT (*mangled)); | |
1408 | ||
7e865541 IB |
1409 | /* Only top-level symbols or function template parameters have |
1410 | a type that needs checking. */ | |
1411 | if (kind == dlang_top_level || kind == dlang_function) | |
1412 | { | |
1413 | /* Artificial symbols end with 'Z' and have no type. */ | |
1414 | if (mangled && *mangled == 'Z') | |
1415 | mangled++; | |
1416 | else | |
1417 | { | |
1418 | saved = string_length (decl); | |
1419 | mangled = dlang_type (decl, mangled); | |
1420 | string_setlength (decl, saved); | |
1421 | } | |
1422 | ||
1423 | /* Check that the entire symbol was successfully demangled. */ | |
1424 | if (kind == dlang_top_level) | |
1425 | { | |
1426 | if (mangled == NULL || *mangled != '\0') | |
1427 | return NULL; | |
1428 | } | |
1429 | } | |
1430 | ||
43b1b9ed IB |
1431 | return mangled; |
1432 | } | |
1433 | ||
1434 | /* Demangle the tuple from MANGLED and append it to DECL. | |
1435 | Return the remaining string on success or NULL on failure. */ | |
1436 | static const char * | |
1437 | dlang_parse_tuple (string *decl, const char *mangled) | |
1438 | { | |
1439 | char *endptr; | |
1440 | long elements = strtol (mangled, &endptr, 10); | |
1441 | ||
1442 | if (endptr == NULL || elements < 0) | |
1443 | return NULL; | |
1444 | ||
1445 | mangled = endptr; | |
1446 | string_append (decl, "Tuple!("); | |
1447 | ||
1448 | while (elements--) | |
1449 | { | |
1450 | mangled = dlang_type (decl, mangled); | |
1451 | if (elements != 0) | |
1452 | string_append (decl, ", "); | |
1453 | } | |
1454 | ||
1455 | string_append (decl, ")"); | |
1456 | return mangled; | |
1457 | } | |
1458 | ||
1459 | /* Demangle the argument list from MANGLED and append it to DECL. | |
1460 | Return the remaining string on success or NULL on failure. */ | |
1461 | static const char * | |
1462 | dlang_template_args (string *decl, const char *mangled) | |
1463 | { | |
1464 | size_t n = 0; | |
1465 | ||
1466 | while (mangled && *mangled != '\0') | |
1467 | { | |
1468 | switch (*mangled) | |
1469 | { | |
1470 | case 'Z': /* End of parameter list. */ | |
1471 | mangled++; | |
1472 | return mangled; | |
1473 | } | |
1474 | ||
1475 | if (n++) | |
1476 | string_append (decl, ", "); | |
1477 | ||
ed4cdb85 IB |
1478 | /* Skip over specialised template prefix. */ |
1479 | if (*mangled == 'H') | |
1480 | mangled++; | |
1481 | ||
43b1b9ed IB |
1482 | switch (*mangled) |
1483 | { | |
1484 | case 'S': /* Symbol parameter. */ | |
1485 | mangled++; | |
7e865541 | 1486 | mangled = dlang_parse_symbol (decl, mangled, dlang_template_param); |
43b1b9ed IB |
1487 | break; |
1488 | case 'T': /* Type parameter. */ | |
1489 | mangled++; | |
1490 | mangled = dlang_type (decl, mangled); | |
1491 | break; | |
1492 | case 'V': /* Value parameter. */ | |
1493 | { | |
1494 | string name; | |
1495 | char type; | |
1496 | ||
1497 | /* Peek at the type. */ | |
1498 | mangled++; | |
1499 | type = *mangled; | |
1500 | ||
1501 | /* In the few instances where the type is actually desired in | |
1502 | the output, it should precede the value from dlang_value. */ | |
1503 | string_init (&name); | |
1504 | mangled = dlang_type (&name, mangled); | |
1505 | string_need (&name, 1); | |
1506 | *(name.p) = '\0'; | |
1507 | ||
1508 | mangled = dlang_value (decl, mangled, name.b, type); | |
1509 | string_delete (&name); | |
1510 | break; | |
1511 | } | |
1512 | ||
1513 | default: | |
1514 | return NULL; | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | return mangled; | |
1519 | } | |
1520 | ||
1521 | /* Extract and demangle the template symbol in MANGLED, expected to | |
1522 | be made up of LEN characters, and append it to DECL. | |
1523 | Returns the remaining signature on success or NULL on failure. */ | |
1524 | static const char * | |
1525 | dlang_parse_template (string *decl, const char *mangled, long len) | |
1526 | { | |
1527 | const char *start = mangled; | |
1528 | ||
1529 | /* Template instance names have the types and values of its parameters | |
1530 | encoded into it. | |
1531 | ||
1532 | TemplateInstanceName: | |
1533 | Number __T LName TemplateArgs Z | |
1534 | ^ | |
1535 | The start pointer should be at the above location, and LEN should be | |
1536 | the value of the decoded number. | |
1537 | */ | |
1538 | if (strncmp (mangled, "__T", 3) != 0) | |
1539 | return NULL; | |
1540 | ||
1541 | mangled += 3; | |
1542 | ||
1543 | /* Template identifier. */ | |
7e865541 | 1544 | mangled = dlang_identifier (decl, mangled, dlang_template_ident); |
43b1b9ed IB |
1545 | |
1546 | /* Template arguments. */ | |
1547 | string_append (decl, "!("); | |
1548 | mangled = dlang_template_args (decl, mangled); | |
1549 | string_append (decl, ")"); | |
1550 | ||
1551 | /* Check for template name length mismatch. */ | |
1552 | if (mangled && (mangled - start) != len) | |
1553 | return NULL; | |
1554 | ||
1555 | return mangled; | |
1556 | } | |
1557 | ||
1558 | /* Extract and demangle the symbol in MANGLED. Returns the demangled | |
1559 | signature on success or NULL on failure. */ | |
1560 | ||
1561 | char * | |
1562 | dlang_demangle (const char *mangled, int option ATTRIBUTE_UNUSED) | |
1563 | { | |
1564 | string decl; | |
1565 | char *demangled = NULL; | |
1566 | ||
1567 | if (mangled == NULL || *mangled == '\0') | |
1568 | return NULL; | |
1569 | ||
1570 | if (strncmp (mangled, "_D", 2) != 0) | |
1571 | return NULL; | |
1572 | ||
1573 | string_init (&decl); | |
1574 | ||
1575 | if (strcmp (mangled, "_Dmain") == 0) | |
1576 | { | |
1577 | string_append (&decl, "D main"); | |
1578 | } | |
1579 | else | |
1580 | { | |
1581 | mangled += 2; | |
1582 | ||
7e865541 | 1583 | if (dlang_parse_symbol (&decl, mangled, dlang_top_level) == NULL) |
43b1b9ed IB |
1584 | string_delete (&decl); |
1585 | } | |
1586 | ||
1587 | if (string_length (&decl) > 0) | |
1588 | { | |
1589 | string_need (&decl, 1); | |
1590 | *(decl.p) = '\0'; | |
1591 | demangled = decl.b; | |
1592 | } | |
1593 | ||
1594 | return demangled; | |
1595 | } | |
1596 |