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b55f9678 | 1 | /* Demangler for the D programming language |
f91ca6bc | 2 | Copyright 2014, 2015 Free Software Foundation, Inc. |
b55f9678 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 | ||
5af04e20 | 31 | This file imports strtol and strtod for decoding mangled literals. */ |
b55f9678 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); | |
5af04e20 | 47 | extern double strtod (const char *nptr, char **endptr); |
b55f9678 IB |
48 | #endif |
49 | ||
50 | #include <demangle.h> | |
51 | #include "libiberty.h" | |
52 | ||
53 | /* A mini string-handling package */ | |
54 | ||
55 | typedef struct string /* Beware: these aren't required to be */ | |
56 | { /* '\0' terminated. */ | |
57 | char *b; /* pointer to start of string */ | |
58 | char *p; /* pointer after last character */ | |
59 | char *e; /* pointer after end of allocated space */ | |
60 | } string; | |
61 | ||
62 | static void | |
63 | string_need (string *s, int n) | |
64 | { | |
65 | int tem; | |
66 | ||
67 | if (s->b == NULL) | |
68 | { | |
69 | if (n < 32) | |
70 | { | |
71 | n = 32; | |
72 | } | |
73 | s->p = s->b = XNEWVEC (char, n); | |
74 | s->e = s->b + n; | |
75 | } | |
76 | else if (s->e - s->p < n) | |
77 | { | |
78 | tem = s->p - s->b; | |
79 | n += tem; | |
80 | n *= 2; | |
81 | s->b = XRESIZEVEC (char, s->b, n); | |
82 | s->p = s->b + tem; | |
83 | s->e = s->b + n; | |
84 | } | |
85 | } | |
86 | ||
87 | static void | |
88 | string_delete (string *s) | |
89 | { | |
90 | if (s->b != NULL) | |
91 | { | |
92 | XDELETEVEC (s->b); | |
93 | s->b = s->e = s->p = NULL; | |
94 | } | |
95 | } | |
96 | ||
97 | static void | |
98 | string_init (string *s) | |
99 | { | |
100 | s->b = s->p = s->e = NULL; | |
101 | } | |
102 | ||
103 | static int | |
104 | string_length (string *s) | |
105 | { | |
106 | if (s->p == s->b) | |
107 | { | |
108 | return 0; | |
109 | } | |
110 | return s->p - s->b; | |
111 | } | |
112 | ||
113 | static void | |
114 | string_setlength (string *s, int n) | |
115 | { | |
116 | if (n - string_length (s) < 0) | |
117 | { | |
118 | s->p = s->b + n; | |
119 | } | |
120 | } | |
121 | ||
122 | static void | |
123 | string_append (string *p, const char *s) | |
124 | { | |
125 | int n = strlen (s); | |
126 | string_need (p, n); | |
127 | memcpy (p->p, s, n); | |
128 | p->p += n; | |
129 | } | |
130 | ||
131 | static void | |
132 | string_appendn (string *p, const char *s, int n) | |
133 | { | |
134 | if (n != 0) | |
135 | { | |
136 | string_need (p, n); | |
137 | memcpy (p->p, s, n); | |
138 | p->p += n; | |
139 | } | |
140 | } | |
141 | ||
142 | static void | |
143 | string_prependn (string *p, const char *s, int n) | |
144 | { | |
145 | char *q; | |
146 | ||
147 | if (n != 0) | |
148 | { | |
149 | string_need (p, n); | |
150 | for (q = p->p - 1; q >= p->b; q--) | |
151 | { | |
152 | q[n] = q[0]; | |
153 | } | |
154 | memcpy (p->b, s, n); | |
155 | p->p += n; | |
156 | } | |
157 | } | |
158 | ||
159 | static void | |
160 | string_prepend (string *p, const char *s) | |
161 | { | |
162 | if (s != NULL && *s != '\0') | |
163 | { | |
164 | string_prependn (p, s, strlen (s)); | |
165 | } | |
166 | } | |
167 | ||
f91ca6bc IB |
168 | /* What kinds of symbol we could be parsing. */ |
169 | enum dlang_symbol_kinds | |
170 | { | |
171 | /* Top-level symbol, needs it's type checked. */ | |
172 | dlang_top_level, | |
173 | /* Function symbol, needs it's type checked. */ | |
174 | dlang_function, | |
175 | /* Strongly typed name, such as for classes, structs and enums. */ | |
176 | dlang_type_name, | |
177 | /* Template identifier. */ | |
178 | dlang_template_ident, | |
179 | /* Template symbol parameter. */ | |
180 | dlang_template_param | |
181 | }; | |
182 | ||
b55f9678 IB |
183 | /* Prototypes for forward referenced functions */ |
184 | static const char *dlang_function_args (string *, const char *); | |
185 | ||
186 | static const char *dlang_type (string *, const char *); | |
187 | ||
188 | static const char *dlang_value (string *, const char *, const char *, char); | |
189 | ||
f91ca6bc IB |
190 | static const char *dlang_parse_symbol (string *, const char *, |
191 | enum dlang_symbol_kinds); | |
b55f9678 IB |
192 | |
193 | static const char *dlang_parse_tuple (string *, const char *); | |
194 | ||
195 | static const char *dlang_parse_template (string *, const char *, long); | |
196 | ||
197 | ||
198 | /* Demangle the calling convention from MANGLED and append it to DECL. | |
199 | Return the remaining string on success or NULL on failure. */ | |
200 | static const char * | |
201 | dlang_call_convention (string *decl, const char *mangled) | |
202 | { | |
203 | if (mangled == NULL || *mangled == '\0') | |
f91ca6bc | 204 | return NULL; |
b55f9678 IB |
205 | |
206 | switch (*mangled) | |
207 | { | |
208 | case 'F': /* (D) */ | |
209 | mangled++; | |
210 | break; | |
211 | case 'U': /* (C) */ | |
212 | mangled++; | |
213 | string_append (decl, "extern(C) "); | |
214 | break; | |
215 | case 'W': /* (Windows) */ | |
216 | mangled++; | |
217 | string_append (decl, "extern(Windows) "); | |
218 | break; | |
219 | case 'V': /* (Pascal) */ | |
220 | mangled++; | |
221 | string_append (decl, "extern(Pascal) "); | |
222 | break; | |
223 | case 'R': /* (C++) */ | |
224 | mangled++; | |
225 | string_append (decl, "extern(C++) "); | |
226 | break; | |
227 | default: | |
228 | return NULL; | |
229 | } | |
230 | ||
231 | return mangled; | |
232 | } | |
233 | ||
f91ca6bc IB |
234 | /* Extract the type modifiers from MANGLED and append them to DECL. |
235 | Returns the remaining signature on success or NULL on failure. */ | |
236 | static const char * | |
237 | dlang_type_modifiers (string *decl, const char *mangled) | |
238 | { | |
239 | if (mangled == NULL || *mangled == '\0') | |
240 | return NULL; | |
241 | ||
242 | switch (*mangled) | |
243 | { | |
244 | case 'x': /* const */ | |
245 | mangled++; | |
246 | string_append (decl, " const"); | |
247 | return mangled; | |
248 | case 'y': /* immutable */ | |
249 | mangled++; | |
250 | string_append (decl, " immutable"); | |
251 | return mangled; | |
252 | case 'O': /* shared */ | |
253 | mangled++; | |
254 | string_append (decl, " shared"); | |
255 | return dlang_type_modifiers (decl, mangled); | |
256 | case 'N': | |
257 | mangled++; | |
258 | if (*mangled == 'g') /* wild */ | |
259 | { | |
260 | mangled++; | |
261 | string_append (decl, " inout"); | |
262 | return dlang_type_modifiers (decl, mangled); | |
263 | } | |
264 | else | |
265 | return NULL; | |
266 | ||
267 | default: | |
268 | return mangled; | |
269 | } | |
270 | } | |
271 | ||
b55f9678 IB |
272 | /* Demangle the D function attributes from MANGLED and append it to DECL. |
273 | Return the remaining string on success or NULL on failure. */ | |
274 | static const char * | |
275 | dlang_attributes (string *decl, const char *mangled) | |
276 | { | |
277 | if (mangled == NULL || *mangled == '\0') | |
f91ca6bc | 278 | return NULL; |
b55f9678 IB |
279 | |
280 | while (*mangled == 'N') | |
281 | { | |
282 | mangled++; | |
283 | switch (*mangled) | |
284 | { | |
285 | case 'a': /* pure */ | |
286 | mangled++; | |
287 | string_append (decl, "pure "); | |
288 | continue; | |
289 | case 'b': /* nothrow */ | |
290 | mangled++; | |
291 | string_append (decl, "nothrow "); | |
292 | continue; | |
293 | case 'c': /* ref */ | |
294 | mangled++; | |
295 | string_append (decl, "ref "); | |
296 | continue; | |
297 | case 'd': /* @property */ | |
298 | mangled++; | |
299 | string_append (decl, "@property "); | |
300 | continue; | |
301 | case 'e': /* @trusted */ | |
302 | mangled++; | |
303 | string_append (decl, "@trusted "); | |
304 | continue; | |
305 | case 'f': /* @safe */ | |
306 | mangled++; | |
307 | string_append (decl, "@safe "); | |
308 | continue; | |
309 | case 'g': | |
310 | case 'h': | |
f91ca6bc | 311 | case 'k': |
b55f9678 IB |
312 | /* inout parameter is represented as 'Ng'. |
313 | vector parameter is represented as 'Nh'. | |
f91ca6bc | 314 | return paramenter is represented as 'Nk'. |
b55f9678 IB |
315 | If we see this, then we know we're really in the |
316 | parameter list. Rewind and break. */ | |
317 | mangled--; | |
318 | break; | |
319 | case 'i': /* @nogc */ | |
320 | mangled++; | |
321 | string_append (decl, "@nogc "); | |
322 | continue; | |
f91ca6bc IB |
323 | case 'j': /* return */ |
324 | mangled++; | |
325 | string_append (decl, "return "); | |
326 | continue; | |
327 | ||
328 | default: /* unknown attribute */ | |
329 | return NULL; | |
b55f9678 IB |
330 | } |
331 | break; | |
332 | } | |
333 | ||
334 | return mangled; | |
335 | } | |
336 | ||
337 | /* Demangle the function type from MANGLED and append it to DECL. | |
338 | Return the remaining string on success or NULL on failure. */ | |
339 | static const char * | |
340 | dlang_function_type (string *decl, const char *mangled) | |
341 | { | |
342 | string attr, args, type; | |
343 | size_t szattr, szargs, sztype; | |
344 | ||
345 | if (mangled == NULL || *mangled == '\0') | |
f91ca6bc | 346 | return NULL; |
b55f9678 IB |
347 | |
348 | /* The order of the mangled string is: | |
349 | CallConvention FuncAttrs Arguments ArgClose Type | |
350 | ||
351 | The demangled string is re-ordered as: | |
352 | CallConvention Type Arguments FuncAttrs | |
353 | */ | |
354 | string_init (&attr); | |
355 | string_init (&args); | |
356 | string_init (&type); | |
357 | ||
358 | /* Function call convention. */ | |
359 | mangled = dlang_call_convention (decl, mangled); | |
360 | ||
361 | /* Function attributes. */ | |
362 | mangled = dlang_attributes (&attr, mangled); | |
363 | szattr = string_length (&attr); | |
364 | ||
365 | /* Function arguments. */ | |
366 | mangled = dlang_function_args (&args, mangled); | |
367 | szargs = string_length (&args); | |
368 | ||
369 | /* Function return type. */ | |
370 | mangled = dlang_type (&type, mangled); | |
371 | sztype = string_length (&type); | |
372 | ||
373 | /* Append to decl in order. */ | |
374 | string_appendn (decl, type.b, sztype); | |
375 | string_append (decl, "("); | |
376 | string_appendn (decl, args.b, szargs); | |
377 | string_append (decl, ") "); | |
378 | string_appendn (decl, attr.b, szattr); | |
379 | ||
380 | string_delete (&attr); | |
381 | string_delete (&args); | |
382 | string_delete (&type); | |
383 | return mangled; | |
384 | } | |
385 | ||
386 | /* Demangle the argument list from MANGLED and append it to DECL. | |
387 | Return the remaining string on success or NULL on failure. */ | |
388 | static const char * | |
389 | dlang_function_args (string *decl, const char *mangled) | |
390 | { | |
391 | size_t n = 0; | |
392 | ||
393 | while (mangled && *mangled != '\0') | |
394 | { | |
395 | switch (*mangled) | |
396 | { | |
397 | case 'X': /* (variadic T t...) style. */ | |
398 | mangled++; | |
399 | string_append (decl, "..."); | |
400 | return mangled; | |
401 | case 'Y': /* (variadic T t, ...) style. */ | |
402 | mangled++; | |
403 | string_append (decl, ", ..."); | |
404 | return mangled; | |
405 | case 'Z': /* Normal function. */ | |
406 | mangled++; | |
407 | return mangled; | |
408 | } | |
409 | ||
410 | if (n++) | |
411 | string_append (decl, ", "); | |
412 | ||
413 | if (*mangled == 'M') /* scope(T) */ | |
414 | { | |
415 | mangled++; | |
416 | string_append (decl, "scope "); | |
417 | } | |
418 | ||
f91ca6bc IB |
419 | if (mangled[0] == 'N' && mangled[1] == 'k') /* return(T) */ |
420 | { | |
421 | mangled += 2; | |
422 | string_append (decl, "return "); | |
423 | } | |
424 | ||
b55f9678 IB |
425 | switch (*mangled) |
426 | { | |
427 | case 'J': /* out(T) */ | |
428 | mangled++; | |
429 | string_append (decl, "out "); | |
430 | break; | |
431 | case 'K': /* ref(T) */ | |
432 | mangled++; | |
433 | string_append (decl, "ref "); | |
434 | break; | |
435 | case 'L': /* lazy(T) */ | |
436 | mangled++; | |
437 | string_append (decl, "lazy "); | |
438 | break; | |
439 | } | |
440 | mangled = dlang_type (decl, mangled); | |
441 | } | |
442 | ||
443 | return mangled; | |
444 | } | |
445 | ||
446 | /* Demangle the type from MANGLED and append it to DECL. | |
447 | Return the remaining string on success or NULL on failure. */ | |
448 | static const char * | |
449 | dlang_type (string *decl, const char *mangled) | |
450 | { | |
451 | if (mangled == NULL || *mangled == '\0') | |
f91ca6bc | 452 | return NULL; |
b55f9678 IB |
453 | |
454 | switch (*mangled) | |
455 | { | |
456 | case 'O': /* shared(T) */ | |
457 | mangled++; | |
458 | string_append (decl, "shared("); | |
459 | mangled = dlang_type (decl, mangled); | |
460 | string_append (decl, ")"); | |
461 | return mangled; | |
462 | case 'x': /* const(T) */ | |
463 | mangled++; | |
464 | string_append (decl, "const("); | |
465 | mangled = dlang_type (decl, mangled); | |
466 | string_append (decl, ")"); | |
467 | return mangled; | |
468 | case 'y': /* immutable(T) */ | |
469 | mangled++; | |
470 | string_append (decl, "immutable("); | |
471 | mangled = dlang_type (decl, mangled); | |
472 | string_append (decl, ")"); | |
473 | return mangled; | |
474 | case 'N': | |
475 | mangled++; | |
476 | if (*mangled == 'g') /* wild(T) */ | |
477 | { | |
478 | mangled++; | |
479 | string_append (decl, "inout("); | |
480 | mangled = dlang_type (decl, mangled); | |
481 | string_append (decl, ")"); | |
482 | return mangled; | |
483 | } | |
484 | else if (*mangled == 'h') /* vector(T) */ | |
485 | { | |
486 | mangled++; | |
487 | string_append (decl, "__vector("); | |
488 | mangled = dlang_type (decl, mangled); | |
489 | string_append (decl, ")"); | |
490 | return mangled; | |
491 | } | |
492 | else | |
493 | return NULL; | |
494 | case 'A': /* dynamic array (T[]) */ | |
495 | mangled++; | |
496 | mangled = dlang_type (decl, mangled); | |
497 | string_append (decl, "[]"); | |
498 | return mangled; | |
499 | case 'G': /* static array (T[N]) */ | |
500 | { | |
501 | const char *numptr; | |
502 | size_t num = 0; | |
503 | mangled++; | |
504 | ||
505 | numptr = mangled; | |
506 | while (ISDIGIT (*mangled)) | |
507 | { | |
508 | num++; | |
509 | mangled++; | |
510 | } | |
511 | mangled = dlang_type (decl, mangled); | |
512 | string_append (decl, "["); | |
513 | string_appendn (decl, numptr, num); | |
514 | string_append (decl, "]"); | |
515 | return mangled; | |
516 | } | |
517 | case 'H': /* associative array (T[T]) */ | |
518 | { | |
519 | string type; | |
520 | size_t sztype; | |
521 | mangled++; | |
522 | ||
523 | string_init (&type); | |
524 | mangled = dlang_type (&type, mangled); | |
525 | sztype = string_length (&type); | |
526 | ||
527 | mangled = dlang_type (decl, mangled); | |
528 | string_append (decl, "["); | |
529 | string_appendn (decl, type.b, sztype); | |
530 | string_append (decl, "]"); | |
531 | ||
532 | string_delete (&type); | |
533 | return mangled; | |
534 | } | |
535 | case 'P': /* pointer (T*) */ | |
536 | mangled++; | |
537 | mangled = dlang_type (decl, mangled); | |
538 | string_append (decl, "*"); | |
539 | return mangled; | |
540 | case 'I': /* ident T */ | |
541 | case 'C': /* class T */ | |
542 | case 'S': /* struct T */ | |
543 | case 'E': /* enum T */ | |
544 | case 'T': /* typedef T */ | |
545 | mangled++; | |
f91ca6bc | 546 | return dlang_parse_symbol (decl, mangled, dlang_type_name); |
b55f9678 | 547 | case 'D': /* delegate T */ |
f91ca6bc IB |
548 | { |
549 | string mods; | |
550 | size_t szmods; | |
b55f9678 | 551 | mangled++; |
f91ca6bc IB |
552 | |
553 | string_init (&mods); | |
554 | mangled = dlang_type_modifiers (&mods, mangled); | |
555 | szmods = string_length (&mods); | |
556 | ||
b55f9678 IB |
557 | mangled = dlang_function_type (decl, mangled); |
558 | string_append (decl, "delegate"); | |
f91ca6bc IB |
559 | string_appendn (decl, mods.b, szmods); |
560 | ||
561 | string_delete (&mods); | |
b55f9678 | 562 | return mangled; |
f91ca6bc | 563 | } |
b55f9678 IB |
564 | case 'B': /* tuple T */ |
565 | mangled++; | |
566 | return dlang_parse_tuple (decl, mangled); | |
567 | ||
568 | /* Function types */ | |
569 | case 'F': case 'U': case 'W': | |
570 | case 'V': case 'R': | |
571 | mangled = dlang_function_type (decl, mangled); | |
572 | string_append (decl, "function"); | |
573 | return mangled; | |
574 | ||
575 | /* Basic types */ | |
576 | case 'n': | |
577 | mangled++; | |
578 | string_append (decl, "none"); | |
579 | return mangled; | |
580 | case 'v': | |
581 | mangled++; | |
582 | string_append (decl, "void"); | |
583 | return mangled; | |
584 | case 'g': | |
585 | mangled++; | |
586 | string_append (decl, "byte"); | |
587 | return mangled; | |
588 | case 'h': | |
589 | mangled++; | |
590 | string_append (decl, "ubyte"); | |
591 | return mangled; | |
592 | case 's': | |
593 | mangled++; | |
594 | string_append (decl, "short"); | |
595 | return mangled; | |
596 | case 't': | |
597 | mangled++; | |
598 | string_append (decl, "ushort"); | |
599 | return mangled; | |
600 | case 'i': | |
601 | mangled++; | |
602 | string_append (decl, "int"); | |
603 | return mangled; | |
604 | case 'k': | |
605 | mangled++; | |
606 | string_append (decl, "uint"); | |
607 | return mangled; | |
608 | case 'l': | |
609 | mangled++; | |
610 | string_append (decl, "long"); | |
611 | return mangled; | |
612 | case 'm': | |
613 | mangled++; | |
614 | string_append (decl, "ulong"); | |
615 | return mangled; | |
616 | case 'f': | |
617 | mangled++; | |
618 | string_append (decl, "float"); | |
619 | return mangled; | |
620 | case 'd': | |
621 | mangled++; | |
622 | string_append (decl, "double"); | |
623 | return mangled; | |
624 | case 'e': | |
625 | mangled++; | |
626 | string_append (decl, "real"); | |
627 | return mangled; | |
628 | ||
629 | /* Imaginary and Complex types */ | |
630 | case 'o': | |
631 | mangled++; | |
632 | string_append (decl, "ifloat"); | |
633 | return mangled; | |
634 | case 'p': | |
635 | mangled++; | |
636 | string_append (decl, "idouble"); | |
637 | return mangled; | |
638 | case 'j': | |
639 | mangled++; | |
640 | string_append (decl, "ireal"); | |
641 | return mangled; | |
642 | case 'q': | |
643 | mangled++; | |
644 | string_append (decl, "cfloat"); | |
645 | return mangled; | |
646 | case 'r': | |
647 | mangled++; | |
648 | string_append (decl, "cdouble"); | |
649 | return mangled; | |
650 | case 'c': | |
651 | mangled++; | |
652 | string_append (decl, "creal"); | |
653 | return mangled; | |
654 | ||
655 | /* Other types */ | |
656 | case 'b': | |
657 | mangled++; | |
658 | string_append (decl, "bool"); | |
659 | return mangled; | |
660 | case 'a': | |
661 | mangled++; | |
662 | string_append (decl, "char"); | |
663 | return mangled; | |
664 | case 'u': | |
665 | mangled++; | |
666 | string_append (decl, "wchar"); | |
667 | return mangled; | |
668 | case 'w': | |
669 | mangled++; | |
670 | string_append (decl, "dchar"); | |
671 | return mangled; | |
f91ca6bc IB |
672 | case 'z': |
673 | mangled++; | |
674 | switch (*mangled) | |
675 | { | |
676 | case 'i': | |
677 | mangled++; | |
678 | string_append (decl, "cent"); | |
679 | return mangled; | |
680 | case 'k': | |
681 | mangled++; | |
682 | string_append (decl, "ucent"); | |
683 | return mangled; | |
684 | } | |
685 | return NULL; | |
b55f9678 IB |
686 | |
687 | default: /* unhandled */ | |
688 | return NULL; | |
689 | } | |
690 | } | |
691 | ||
692 | /* Extract the identifier from MANGLED and append it to DECL. | |
693 | Return the remaining string on success or NULL on failure. */ | |
694 | static const char * | |
f91ca6bc IB |
695 | dlang_identifier (string *decl, const char *mangled, |
696 | enum dlang_symbol_kinds kind) | |
b55f9678 | 697 | { |
f91ca6bc IB |
698 | char *endptr; |
699 | long len; | |
700 | ||
b55f9678 | 701 | if (mangled == NULL || *mangled == '\0') |
f91ca6bc | 702 | return NULL; |
b55f9678 | 703 | |
f91ca6bc IB |
704 | len = strtol (mangled, &endptr, 10); |
705 | ||
706 | if (endptr == NULL || len <= 0) | |
707 | return NULL; | |
708 | ||
709 | /* In template parameter symbols, the first character of the mangled | |
710 | name can be a digit. This causes ambiguity issues because the | |
711 | digits of the two numbers are adjacent. */ | |
712 | if (kind == dlang_template_param) | |
b55f9678 | 713 | { |
f91ca6bc IB |
714 | long psize = len; |
715 | char *pend; | |
716 | int saved = string_length (decl); | |
b55f9678 | 717 | |
f91ca6bc IB |
718 | /* Work backwards until a match is found. */ |
719 | for (pend = endptr; endptr != NULL; pend--) | |
720 | { | |
721 | mangled = pend; | |
722 | ||
723 | /* Reached the beginning of the pointer to the name length, | |
724 | try parsing the entire symbol. */ | |
725 | if (psize == 0) | |
726 | { | |
727 | psize = len; | |
728 | pend = endptr; | |
729 | endptr = NULL; | |
730 | } | |
731 | ||
732 | /* Check whether template parameter is a function with a valid | |
733 | return type or an untyped identifier. */ | |
734 | if (ISDIGIT (*mangled)) | |
735 | mangled = dlang_parse_symbol (decl, mangled, dlang_template_ident); | |
736 | else if (strncmp (mangled, "_D", 2) == 0) | |
737 | { | |
738 | mangled += 2; | |
739 | mangled = dlang_parse_symbol (decl, mangled, dlang_function); | |
740 | } | |
741 | ||
742 | /* Check for name length mismatch. */ | |
743 | if (mangled && (mangled - pend) == psize) | |
744 | return mangled; | |
745 | ||
746 | psize /= 10; | |
747 | string_setlength (decl, saved); | |
748 | } | |
749 | ||
750 | /* No match on any combinations. */ | |
751 | return NULL; | |
752 | } | |
753 | else | |
754 | { | |
755 | if (strlen (endptr) < (size_t) len) | |
b55f9678 IB |
756 | return NULL; |
757 | ||
758 | mangled = endptr; | |
759 | ||
760 | /* May be a template instance. */ | |
f91ca6bc | 761 | if (len >= 5 && strncmp (mangled, "__T", 3) == 0) |
b55f9678 IB |
762 | { |
763 | /* Template symbol. */ | |
764 | if (ISDIGIT (mangled[3]) && mangled[3] != '0') | |
f91ca6bc | 765 | return dlang_parse_template (decl, mangled, len); |
b55f9678 IB |
766 | |
767 | return NULL; | |
768 | } | |
769 | ||
f91ca6bc | 770 | switch (len) |
b55f9678 | 771 | { |
f91ca6bc IB |
772 | case 6: |
773 | if (strncmp (mangled, "__ctor", len) == 0) | |
774 | { | |
775 | /* Constructor symbol for a class/struct. */ | |
776 | string_append (decl, "this"); | |
777 | mangled += len; | |
778 | return mangled; | |
779 | } | |
780 | else if (strncmp (mangled, "__dtor", len) == 0) | |
781 | { | |
782 | /* Destructor symbol for a class/struct. */ | |
783 | string_append (decl, "~this"); | |
784 | mangled += len; | |
785 | return mangled; | |
786 | } | |
787 | else if (strncmp (mangled, "__initZ", len+1) == 0) | |
788 | { | |
789 | /* The static initialiser for a given symbol. */ | |
790 | string_append (decl, "init$"); | |
791 | mangled += len; | |
792 | return mangled; | |
793 | } | |
794 | else if (strncmp (mangled, "__vtblZ", len+1) == 0) | |
795 | { | |
796 | /* The vtable symbol for a given class. */ | |
797 | string_prepend (decl, "vtable for "); | |
798 | string_setlength (decl, string_length (decl) - 1); | |
799 | mangled += len; | |
800 | return mangled; | |
801 | } | |
802 | break; | |
803 | ||
804 | case 7: | |
805 | if (strncmp (mangled, "__ClassZ", len+1) == 0) | |
806 | { | |
807 | /* The classinfo symbol for a given class. */ | |
808 | string_prepend (decl, "ClassInfo for "); | |
809 | string_setlength (decl, string_length (decl) - 1); | |
810 | mangled += len; | |
811 | return mangled; | |
812 | } | |
813 | break; | |
814 | ||
815 | case 10: | |
816 | if (strncmp (mangled, "__postblitMFZ", len+3) == 0) | |
817 | { | |
818 | /* Postblit symbol for a struct. */ | |
819 | string_append (decl, "this(this)"); | |
820 | mangled += len + 3; | |
821 | return mangled; | |
822 | } | |
823 | break; | |
824 | ||
825 | case 11: | |
826 | if (strncmp (mangled, "__InterfaceZ", len+1) == 0) | |
827 | { | |
828 | /* The interface symbol for a given class. */ | |
829 | string_prepend (decl, "Interface for "); | |
830 | string_setlength (decl, string_length (decl) - 1); | |
831 | mangled += len; | |
832 | return mangled; | |
833 | } | |
834 | break; | |
835 | ||
836 | case 12: | |
837 | if (strncmp (mangled, "__ModuleInfoZ", len+1) == 0) | |
838 | { | |
839 | /* The ModuleInfo symbol for a given module. */ | |
840 | string_prepend (decl, "ModuleInfo for "); | |
841 | string_setlength (decl, string_length (decl) - 1); | |
842 | mangled += len; | |
843 | return mangled; | |
844 | } | |
845 | break; | |
b55f9678 IB |
846 | } |
847 | ||
f91ca6bc IB |
848 | string_appendn (decl, mangled, len); |
849 | mangled += len; | |
b55f9678 | 850 | } |
b55f9678 IB |
851 | |
852 | return mangled; | |
853 | } | |
854 | ||
855 | /* Extract the integer value from MANGLED and append it to DECL, | |
856 | where TYPE is the type it should be represented as. | |
857 | Return the remaining string on success or NULL on failure. */ | |
858 | static const char * | |
859 | dlang_parse_integer (string *decl, const char *mangled, char type) | |
860 | { | |
861 | if (type == 'a' || type == 'u' || type == 'w') | |
862 | { | |
863 | /* Parse character value. */ | |
864 | char value[10]; | |
865 | int pos = 10; | |
866 | int width = 0; | |
867 | char *endptr; | |
868 | long val = strtol (mangled, &endptr, 10); | |
869 | ||
870 | if (endptr == NULL || val < 0) | |
871 | return NULL; | |
872 | ||
873 | string_append (decl, "'"); | |
874 | ||
875 | if (type == 'a' && val >= 0x20 && val < 0x7F) | |
876 | { | |
877 | /* Represent as a character literal. */ | |
878 | char c = (char) val; | |
879 | string_appendn (decl, &c, 1); | |
880 | } | |
881 | else | |
882 | { | |
883 | /* Represent as a hexadecimal value. */ | |
884 | switch (type) | |
885 | { | |
886 | case 'a': /* char */ | |
887 | string_append (decl, "\\x"); | |
888 | width = 2; | |
889 | break; | |
890 | case 'u': /* wchar */ | |
891 | string_append (decl, "\\u"); | |
892 | width = 4; | |
893 | break; | |
894 | case 'w': /* dchar */ | |
895 | string_append (decl, "\\U"); | |
896 | width = 8; | |
897 | break; | |
898 | } | |
899 | ||
900 | while (val > 0) | |
901 | { | |
902 | int digit = val % 16; | |
903 | ||
904 | if (digit < 10) | |
905 | value[--pos] = (char)(digit + '0'); | |
906 | else | |
907 | value[--pos] = (char)((digit - 10) + 'a'); | |
908 | ||
909 | val /= 16; | |
910 | width--; | |
911 | } | |
912 | ||
913 | for (; width > 0; width--) | |
914 | value[--pos] = '0'; | |
915 | ||
916 | string_appendn (decl, &(value[pos]), 10 - pos); | |
917 | } | |
918 | string_append (decl, "'"); | |
919 | mangled = endptr; | |
920 | } | |
921 | else if (type == 'b') | |
922 | { | |
923 | /* Parse boolean value. */ | |
924 | char *endptr; | |
925 | long val = strtol (mangled, &endptr, 10); | |
926 | ||
927 | if (endptr == NULL || val < 0) | |
928 | return NULL; | |
929 | ||
930 | string_append (decl, val ? "true" : "false"); | |
931 | mangled = endptr; | |
932 | } | |
933 | else | |
934 | { | |
935 | /* Parse integer value. */ | |
936 | const char *numptr = mangled; | |
937 | size_t num = 0; | |
938 | ||
939 | while (ISDIGIT (*mangled)) | |
940 | { | |
941 | num++; | |
942 | mangled++; | |
943 | } | |
944 | string_appendn (decl, numptr, num); | |
945 | ||
946 | /* Append suffix. */ | |
947 | switch (type) | |
948 | { | |
949 | case 'h': /* ubyte */ | |
950 | case 't': /* ushort */ | |
951 | case 'k': /* uint */ | |
952 | string_append (decl, "u"); | |
953 | break; | |
954 | case 'l': /* long */ | |
955 | string_append (decl, "L"); | |
956 | break; | |
957 | case 'm': /* ulong */ | |
958 | string_append (decl, "uL"); | |
959 | break; | |
960 | } | |
961 | } | |
962 | ||
963 | return mangled; | |
964 | } | |
965 | ||
966 | /* Extract the floating-point value from MANGLED and append it to DECL. | |
967 | Return the remaining string on success or NULL on failure. */ | |
968 | static const char * | |
969 | dlang_parse_real (string *decl, const char *mangled) | |
970 | { | |
971 | char buffer[64]; | |
972 | int len = 0; | |
5af04e20 | 973 | double value; |
b55f9678 IB |
974 | char *endptr; |
975 | ||
976 | /* Handle NAN and +-INF. */ | |
977 | if (strncmp (mangled, "NAN", 3) == 0) | |
978 | { | |
979 | string_append (decl, "NaN"); | |
980 | mangled += 3; | |
981 | return mangled; | |
982 | } | |
983 | else if (strncmp (mangled, "INF", 3) == 0) | |
984 | { | |
985 | string_append (decl, "Inf"); | |
986 | mangled += 3; | |
987 | return mangled; | |
988 | } | |
989 | else if (strncmp (mangled, "NINF", 4) == 0) | |
990 | { | |
991 | string_append (decl, "-Inf"); | |
992 | mangled += 4; | |
993 | return mangled; | |
994 | } | |
995 | ||
996 | /* Hexadecimal prefix and leading bit. */ | |
997 | if (*mangled == 'N') | |
998 | { | |
999 | buffer[len++] = '-'; | |
1000 | mangled++; | |
1001 | } | |
1002 | ||
1003 | if (!ISXDIGIT (*mangled)) | |
1004 | return NULL; | |
1005 | ||
1006 | buffer[len++] = '0'; | |
1007 | buffer[len++] = 'x'; | |
1008 | buffer[len++] = *mangled; | |
1009 | buffer[len++] = '.'; | |
1010 | mangled++; | |
1011 | ||
1012 | /* Significand. */ | |
1013 | while (ISXDIGIT (*mangled)) | |
1014 | { | |
1015 | buffer[len++] = *mangled; | |
1016 | mangled++; | |
1017 | } | |
1018 | ||
1019 | /* Exponent. */ | |
1020 | if (*mangled != 'P') | |
1021 | return NULL; | |
1022 | ||
1023 | buffer[len++] = 'p'; | |
1024 | mangled++; | |
1025 | ||
1026 | if (*mangled == 'N') | |
1027 | { | |
1028 | buffer[len++] = '-'; | |
1029 | mangled++; | |
1030 | } | |
1031 | ||
1032 | while (ISDIGIT (*mangled)) | |
1033 | { | |
1034 | buffer[len++] = *mangled; | |
1035 | mangled++; | |
1036 | } | |
1037 | ||
1038 | /* Convert buffer from hexadecimal to floating-point. */ | |
1039 | buffer[len] = '\0'; | |
5af04e20 | 1040 | value = strtod (buffer, &endptr); |
b55f9678 IB |
1041 | |
1042 | if (endptr == NULL || endptr != (buffer + len)) | |
1043 | return NULL; | |
1044 | ||
5af04e20 | 1045 | len = snprintf (buffer, sizeof(buffer), "%#g", value); |
b55f9678 IB |
1046 | string_appendn (decl, buffer, len); |
1047 | return mangled; | |
1048 | } | |
1049 | ||
1050 | /* Convert VAL from an ascii hexdigit to value. */ | |
1051 | static char | |
1052 | ascii2hex (char val) | |
1053 | { | |
1054 | if (val >= 'a' && val <= 'f') | |
1055 | return (val - 'a' + 10); | |
1056 | ||
1057 | if (val >= 'A' && val <= 'F') | |
1058 | return (val - 'A' + 10); | |
1059 | ||
1060 | if (val >= '0' && val <= '9') | |
1061 | return (val - '0'); | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | /* Extract the string value from MANGLED and append it to DECL. | |
1067 | Return the remaining string on success or NULL on failure. */ | |
1068 | static const char * | |
1069 | dlang_parse_string (string *decl, const char *mangled) | |
1070 | { | |
1071 | char type = *mangled; | |
1072 | char *endptr; | |
1073 | long len; | |
1074 | ||
1075 | mangled++; | |
1076 | len = strtol (mangled, &endptr, 10); | |
1077 | ||
1078 | if (endptr == NULL || len < 0) | |
1079 | return NULL; | |
1080 | ||
1081 | mangled = endptr; | |
1082 | if (*mangled != '_') | |
1083 | return NULL; | |
1084 | ||
1085 | mangled++; | |
1086 | string_append (decl, "\""); | |
1087 | while (len--) | |
1088 | { | |
1089 | if (ISXDIGIT (mangled[0]) && ISXDIGIT (mangled[1])) | |
1090 | { | |
1091 | char a = ascii2hex (mangled[0]); | |
1092 | char b = ascii2hex (mangled[1]); | |
1093 | char val = (a << 4) | b; | |
f91ca6bc IB |
1094 | |
1095 | /* Sanitize white and non-printable characters. */ | |
1096 | switch (val) | |
1097 | { | |
1098 | case ' ': | |
1099 | string_append (decl, " "); | |
1100 | break; | |
1101 | case '\t': | |
1102 | string_append (decl, "\\t"); | |
1103 | break; | |
1104 | case '\n': | |
1105 | string_append (decl, "\\n"); | |
1106 | break; | |
1107 | case '\r': | |
1108 | string_append (decl, "\\r"); | |
1109 | break; | |
1110 | case '\f': | |
1111 | string_append (decl, "\\f"); | |
1112 | break; | |
1113 | case '\v': | |
1114 | string_append (decl, "\\v"); | |
1115 | break; | |
1116 | ||
1117 | default: | |
1118 | if (ISPRINT (val)) | |
1119 | string_appendn (decl, &val, 1); | |
1120 | else | |
1121 | { | |
1122 | string_append (decl, "\\x"); | |
1123 | string_appendn (decl, mangled, 2); | |
1124 | } | |
1125 | } | |
b55f9678 IB |
1126 | } |
1127 | else | |
1128 | return NULL; | |
1129 | ||
1130 | mangled += 2; | |
1131 | } | |
1132 | string_append (decl, "\""); | |
1133 | ||
1134 | if (type != 'a') | |
1135 | string_appendn (decl, &type, 1); | |
1136 | ||
1137 | return mangled; | |
1138 | } | |
1139 | ||
1140 | /* Extract the static array value from MANGLED and append it to DECL. | |
1141 | Return the remaining string on success or NULL on failure. */ | |
1142 | static const char * | |
1143 | dlang_parse_arrayliteral (string *decl, const char *mangled) | |
1144 | { | |
1145 | char *endptr; | |
1146 | long elements = strtol (mangled, &endptr, 10); | |
1147 | ||
1148 | if (endptr == NULL || elements < 0) | |
1149 | return NULL; | |
1150 | ||
1151 | mangled = endptr; | |
1152 | string_append (decl, "["); | |
1153 | while (elements--) | |
1154 | { | |
1155 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1156 | if (elements != 0) | |
1157 | string_append (decl, ", "); | |
1158 | } | |
1159 | ||
1160 | string_append (decl, "]"); | |
1161 | return mangled; | |
1162 | } | |
1163 | ||
1164 | /* Extract the associative array value from MANGLED and append it to DECL. | |
1165 | Return the remaining string on success or NULL on failure. */ | |
1166 | static const char * | |
1167 | dlang_parse_assocarray (string *decl, const char *mangled) | |
1168 | { | |
1169 | char *endptr; | |
1170 | long elements = strtol (mangled, &endptr, 10); | |
1171 | ||
1172 | if (endptr == NULL || elements < 0) | |
1173 | return NULL; | |
1174 | ||
1175 | mangled = endptr; | |
1176 | string_append (decl, "["); | |
1177 | while (elements--) | |
1178 | { | |
1179 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1180 | string_append (decl, ":"); | |
1181 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1182 | ||
1183 | if (elements != 0) | |
1184 | string_append (decl, ", "); | |
1185 | } | |
1186 | ||
1187 | string_append (decl, "]"); | |
1188 | return mangled; | |
1189 | } | |
1190 | ||
1191 | /* Extract the struct literal value for NAME from MANGLED and append it to DECL. | |
1192 | Return the remaining string on success or NULL on failure. */ | |
1193 | static const char * | |
1194 | dlang_parse_structlit (string *decl, const char *mangled, const char *name) | |
1195 | { | |
1196 | char *endptr; | |
1197 | long args = strtol (mangled, &endptr, 10); | |
1198 | ||
1199 | if (endptr == NULL || args < 0) | |
1200 | return NULL; | |
1201 | ||
1202 | mangled = endptr; | |
1203 | if (name != NULL) | |
1204 | string_append (decl, name); | |
1205 | ||
1206 | string_append (decl, "("); | |
1207 | while (args--) | |
1208 | { | |
1209 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1210 | if (args != 0) | |
1211 | string_append (decl, ", "); | |
1212 | } | |
1213 | ||
1214 | string_append (decl, ")"); | |
1215 | return mangled; | |
1216 | } | |
1217 | ||
1218 | /* Extract the value from MANGLED and append it to DECL. | |
1219 | Return the remaining string on success or NULL on failure. */ | |
1220 | static const char * | |
1221 | dlang_value (string *decl, const char *mangled, const char *name, char type) | |
1222 | { | |
1223 | if (mangled == NULL || *mangled == '\0') | |
f91ca6bc | 1224 | return NULL; |
b55f9678 IB |
1225 | |
1226 | switch (*mangled) | |
1227 | { | |
1228 | /* Null value. */ | |
1229 | case 'n': | |
1230 | mangled++; | |
1231 | string_append (decl, "null"); | |
1232 | break; | |
1233 | ||
1234 | /* Integral values. */ | |
1235 | case 'N': | |
1236 | mangled++; | |
1237 | string_append (decl, "-"); | |
1238 | mangled = dlang_parse_integer (decl, mangled, type); | |
1239 | break; | |
1240 | ||
1241 | case 'i': | |
1242 | mangled++; | |
1243 | if (*mangled < '0' || *mangled > '9') | |
1244 | return NULL; | |
1245 | /* Fall through */ | |
1246 | case '0': case '1': case '2': case '3': case '4': | |
1247 | case '5': case '6': case '7': case '8': case '9': | |
1248 | mangled = dlang_parse_integer (decl, mangled, type); | |
1249 | break; | |
1250 | ||
1251 | /* Real value. */ | |
1252 | case 'e': | |
1253 | mangled++; | |
1254 | mangled = dlang_parse_real (decl, mangled); | |
1255 | break; | |
1256 | ||
1257 | /* Complex value. */ | |
1258 | case 'c': | |
1259 | mangled++; | |
1260 | mangled = dlang_parse_real (decl, mangled); | |
1261 | string_append (decl, "+"); | |
1262 | if (mangled == NULL || *mangled != 'c') | |
1263 | return NULL; | |
1264 | mangled++; | |
1265 | mangled = dlang_parse_real (decl, mangled); | |
1266 | string_append (decl, "i"); | |
1267 | break; | |
1268 | ||
1269 | /* String values. */ | |
1270 | case 'a': /* UTF8 */ | |
1271 | case 'w': /* UTF16 */ | |
1272 | case 'd': /* UTF32 */ | |
1273 | mangled = dlang_parse_string (decl, mangled); | |
1274 | break; | |
1275 | ||
1276 | /* Array values. */ | |
1277 | case 'A': | |
1278 | mangled++; | |
1279 | if (type == 'H') | |
1280 | mangled = dlang_parse_assocarray (decl, mangled); | |
1281 | else | |
1282 | mangled = dlang_parse_arrayliteral (decl, mangled); | |
1283 | break; | |
1284 | ||
1285 | /* Struct values. */ | |
1286 | case 'S': | |
1287 | mangled++; | |
1288 | mangled = dlang_parse_structlit (decl, mangled, name); | |
1289 | break; | |
1290 | ||
1291 | default: | |
1292 | return NULL; | |
1293 | } | |
1294 | ||
1295 | return mangled; | |
1296 | } | |
1297 | ||
f91ca6bc IB |
1298 | /* Extract the type modifiers from MANGLED and return the string |
1299 | length that it consumes in MANGLED on success or 0 on failure. */ | |
b55f9678 | 1300 | static int |
f91ca6bc | 1301 | dlang_type_modifier_p (const char *mangled) |
b55f9678 | 1302 | { |
f91ca6bc | 1303 | int i; |
b55f9678 IB |
1304 | |
1305 | switch (*mangled) | |
1306 | { | |
f91ca6bc | 1307 | case 'x': case 'y': |
b55f9678 IB |
1308 | return 1; |
1309 | ||
f91ca6bc IB |
1310 | case 'O': |
1311 | mangled++; | |
1312 | i = dlang_type_modifier_p (mangled); | |
1313 | return i + 1; | |
b55f9678 | 1314 | |
f91ca6bc IB |
1315 | case 'N': |
1316 | mangled++; | |
1317 | if (*mangled == 'g') | |
b55f9678 | 1318 | { |
f91ca6bc IB |
1319 | mangled++; |
1320 | i = dlang_type_modifier_p (mangled); | |
1321 | return i + 2; | |
b55f9678 | 1322 | } |
f91ca6bc IB |
1323 | } |
1324 | ||
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | /* Extract the function calling convention from MANGLED and | |
1329 | return 1 on success or 0 on failure. */ | |
1330 | static int | |
1331 | dlang_call_convention_p (const char *mangled) | |
1332 | { | |
1333 | /* Prefix for functions needing 'this' */ | |
1334 | if (*mangled == 'M') | |
1335 | { | |
1336 | mangled++; | |
1337 | /* Also skip over any type modifiers. */ | |
1338 | mangled += dlang_type_modifier_p (mangled); | |
1339 | } | |
1340 | ||
1341 | switch (*mangled) | |
1342 | { | |
1343 | case 'F': case 'U': case 'V': | |
1344 | case 'W': case 'R': | |
1345 | return 1; | |
b55f9678 IB |
1346 | |
1347 | default: | |
1348 | return 0; | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | /* Extract and demangle the symbol in MANGLED and append it to DECL. | |
1353 | Returns the remaining signature on success or NULL on failure. */ | |
1354 | static const char * | |
f91ca6bc IB |
1355 | dlang_parse_symbol (string *decl, const char *mangled, |
1356 | enum dlang_symbol_kinds kind) | |
b55f9678 | 1357 | { |
f91ca6bc | 1358 | int saved; |
b55f9678 IB |
1359 | size_t n = 0; |
1360 | do | |
1361 | { | |
1362 | if (n++) | |
1363 | string_append (decl, "."); | |
1364 | ||
f91ca6bc | 1365 | mangled = dlang_identifier (decl, mangled, kind); |
b55f9678 IB |
1366 | |
1367 | if (mangled && dlang_call_convention_p (mangled)) | |
1368 | { | |
f91ca6bc IB |
1369 | string mods; |
1370 | const char *start = NULL; | |
1371 | int checkpoint = 0; | |
b55f9678 IB |
1372 | |
1373 | /* Skip over 'this' parameter. */ | |
1374 | if (*mangled == 'M') | |
f91ca6bc IB |
1375 | mangled++; |
1376 | ||
1377 | /* We have reached here because we expect an extern(Pascal) function. | |
1378 | However this is so rare, that it is more likely a template value | |
1379 | parameter. Since this can't be assumed, first attempt parsing | |
1380 | the symbol as a function, and then back out on failure. */ | |
1381 | if (*mangled == 'V') | |
1382 | { | |
1383 | start = mangled; | |
1384 | checkpoint = string_length (decl); | |
1385 | } | |
1386 | ||
1387 | /* Save the type modifiers for appending at the end. */ | |
1388 | string_init (&mods); | |
1389 | mangled = dlang_type_modifiers (&mods, mangled); | |
b55f9678 IB |
1390 | |
1391 | /* Skip over calling convention and attributes in qualified name. */ | |
1392 | saved = string_length (decl); | |
1393 | mangled = dlang_call_convention (decl, mangled); | |
1394 | mangled = dlang_attributes (decl, mangled); | |
1395 | string_setlength (decl, saved); | |
1396 | ||
1397 | string_append (decl, "("); | |
1398 | mangled = dlang_function_args (decl, mangled); | |
1399 | string_append (decl, ")"); | |
1400 | ||
f91ca6bc IB |
1401 | /* Add any const/immutable/shared modifier. */ |
1402 | string_appendn (decl, mods.b, string_length (&mods)); | |
1403 | string_delete (&mods); | |
1404 | ||
1405 | if (mangled == NULL && checkpoint != 0) | |
b55f9678 | 1406 | { |
f91ca6bc IB |
1407 | mangled = start; |
1408 | string_setlength (decl, checkpoint); | |
b55f9678 IB |
1409 | } |
1410 | } | |
1411 | } | |
1412 | while (mangled && ISDIGIT (*mangled)); | |
1413 | ||
f91ca6bc IB |
1414 | /* Only top-level symbols or function template parameters have |
1415 | a type that needs checking. */ | |
1416 | if (kind == dlang_top_level || kind == dlang_function) | |
1417 | { | |
1418 | /* Artificial symbols end with 'Z' and have no type. */ | |
1419 | if (mangled && *mangled == 'Z') | |
1420 | mangled++; | |
1421 | else | |
1422 | { | |
1423 | saved = string_length (decl); | |
1424 | mangled = dlang_type (decl, mangled); | |
1425 | string_setlength (decl, saved); | |
1426 | } | |
1427 | ||
1428 | /* Check that the entire symbol was successfully demangled. */ | |
1429 | if (kind == dlang_top_level) | |
1430 | { | |
1431 | if (mangled == NULL || *mangled != '\0') | |
1432 | return NULL; | |
1433 | } | |
1434 | } | |
1435 | ||
b55f9678 IB |
1436 | return mangled; |
1437 | } | |
1438 | ||
1439 | /* Demangle the tuple from MANGLED and append it to DECL. | |
1440 | Return the remaining string on success or NULL on failure. */ | |
1441 | static const char * | |
1442 | dlang_parse_tuple (string *decl, const char *mangled) | |
1443 | { | |
1444 | char *endptr; | |
1445 | long elements = strtol (mangled, &endptr, 10); | |
1446 | ||
1447 | if (endptr == NULL || elements < 0) | |
1448 | return NULL; | |
1449 | ||
1450 | mangled = endptr; | |
1451 | string_append (decl, "Tuple!("); | |
1452 | ||
1453 | while (elements--) | |
1454 | { | |
1455 | mangled = dlang_type (decl, mangled); | |
1456 | if (elements != 0) | |
1457 | string_append (decl, ", "); | |
1458 | } | |
1459 | ||
1460 | string_append (decl, ")"); | |
1461 | return mangled; | |
1462 | } | |
1463 | ||
1464 | /* Demangle the argument list from MANGLED and append it to DECL. | |
1465 | Return the remaining string on success or NULL on failure. */ | |
1466 | static const char * | |
1467 | dlang_template_args (string *decl, const char *mangled) | |
1468 | { | |
1469 | size_t n = 0; | |
1470 | ||
1471 | while (mangled && *mangled != '\0') | |
1472 | { | |
1473 | switch (*mangled) | |
1474 | { | |
1475 | case 'Z': /* End of parameter list. */ | |
1476 | mangled++; | |
1477 | return mangled; | |
1478 | } | |
1479 | ||
1480 | if (n++) | |
1481 | string_append (decl, ", "); | |
1482 | ||
f91ca6bc IB |
1483 | /* Skip over specialised template prefix. */ |
1484 | if (*mangled == 'H') | |
1485 | mangled++; | |
1486 | ||
b55f9678 IB |
1487 | switch (*mangled) |
1488 | { | |
1489 | case 'S': /* Symbol parameter. */ | |
1490 | mangled++; | |
f91ca6bc | 1491 | mangled = dlang_parse_symbol (decl, mangled, dlang_template_param); |
b55f9678 IB |
1492 | break; |
1493 | case 'T': /* Type parameter. */ | |
1494 | mangled++; | |
1495 | mangled = dlang_type (decl, mangled); | |
1496 | break; | |
1497 | case 'V': /* Value parameter. */ | |
1498 | { | |
1499 | string name; | |
1500 | char type; | |
1501 | ||
1502 | /* Peek at the type. */ | |
1503 | mangled++; | |
1504 | type = *mangled; | |
1505 | ||
1506 | /* In the few instances where the type is actually desired in | |
1507 | the output, it should precede the value from dlang_value. */ | |
1508 | string_init (&name); | |
1509 | mangled = dlang_type (&name, mangled); | |
1510 | string_need (&name, 1); | |
1511 | *(name.p) = '\0'; | |
1512 | ||
1513 | mangled = dlang_value (decl, mangled, name.b, type); | |
1514 | string_delete (&name); | |
1515 | break; | |
1516 | } | |
1517 | ||
1518 | default: | |
1519 | return NULL; | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | return mangled; | |
1524 | } | |
1525 | ||
1526 | /* Extract and demangle the template symbol in MANGLED, expected to | |
1527 | be made up of LEN characters, and append it to DECL. | |
1528 | Returns the remaining signature on success or NULL on failure. */ | |
1529 | static const char * | |
1530 | dlang_parse_template (string *decl, const char *mangled, long len) | |
1531 | { | |
1532 | const char *start = mangled; | |
1533 | ||
1534 | /* Template instance names have the types and values of its parameters | |
1535 | encoded into it. | |
1536 | ||
1537 | TemplateInstanceName: | |
1538 | Number __T LName TemplateArgs Z | |
1539 | ^ | |
1540 | The start pointer should be at the above location, and LEN should be | |
1541 | the value of the decoded number. | |
1542 | */ | |
1543 | if (strncmp (mangled, "__T", 3) != 0) | |
1544 | return NULL; | |
1545 | ||
1546 | mangled += 3; | |
1547 | ||
1548 | /* Template identifier. */ | |
f91ca6bc | 1549 | mangled = dlang_identifier (decl, mangled, dlang_template_ident); |
b55f9678 IB |
1550 | |
1551 | /* Template arguments. */ | |
1552 | string_append (decl, "!("); | |
1553 | mangled = dlang_template_args (decl, mangled); | |
1554 | string_append (decl, ")"); | |
1555 | ||
1556 | /* Check for template name length mismatch. */ | |
1557 | if (mangled && (mangled - start) != len) | |
1558 | return NULL; | |
1559 | ||
1560 | return mangled; | |
1561 | } | |
1562 | ||
1563 | /* Extract and demangle the symbol in MANGLED. Returns the demangled | |
1564 | signature on success or NULL on failure. */ | |
1565 | ||
1566 | char * | |
1567 | dlang_demangle (const char *mangled, int option ATTRIBUTE_UNUSED) | |
1568 | { | |
1569 | string decl; | |
1570 | char *demangled = NULL; | |
1571 | ||
1572 | if (mangled == NULL || *mangled == '\0') | |
1573 | return NULL; | |
1574 | ||
1575 | if (strncmp (mangled, "_D", 2) != 0) | |
1576 | return NULL; | |
1577 | ||
1578 | string_init (&decl); | |
1579 | ||
1580 | if (strcmp (mangled, "_Dmain") == 0) | |
1581 | { | |
1582 | string_append (&decl, "D main"); | |
1583 | } | |
1584 | else | |
1585 | { | |
1586 | mangled += 2; | |
1587 | ||
f91ca6bc | 1588 | if (dlang_parse_symbol (&decl, mangled, dlang_top_level) == NULL) |
b55f9678 IB |
1589 | string_delete (&decl); |
1590 | } | |
1591 | ||
1592 | if (string_length (&decl) > 0) | |
1593 | { | |
1594 | string_need (&decl, 1); | |
1595 | *(decl.p) = '\0'; | |
1596 | demangled = decl.b; | |
1597 | } | |
1598 | ||
1599 | return demangled; | |
1600 | } | |
1601 |