Commit | Line | Data |
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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 | ||
30379291 | 31 | This file imports strtol 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); | |
b55f9678 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 | ||
f91ca6bc 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 | ||
b55f9678 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 | ||
f91ca6bc IB |
189 | static const char *dlang_parse_symbol (string *, const char *, |
190 | enum dlang_symbol_kinds); | |
b55f9678 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') | |
f91ca6bc | 203 | return NULL; |
b55f9678 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 | ||
f91ca6bc 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 | ||
b55f9678 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') | |
f91ca6bc | 277 | return NULL; |
b55f9678 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': | |
f91ca6bc | 310 | case 'k': |
b55f9678 IB |
311 | /* inout parameter is represented as 'Ng'. |
312 | vector parameter is represented as 'Nh'. | |
f91ca6bc | 313 | return paramenter is represented as 'Nk'. |
b55f9678 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; | |
f91ca6bc IB |
322 | case 'j': /* return */ |
323 | mangled++; | |
324 | string_append (decl, "return "); | |
325 | continue; | |
326 | ||
327 | default: /* unknown attribute */ | |
328 | return NULL; | |
b55f9678 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') | |
f91ca6bc | 345 | return NULL; |
b55f9678 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 | ||
f91ca6bc IB |
418 | if (mangled[0] == 'N' && mangled[1] == 'k') /* return(T) */ |
419 | { | |
420 | mangled += 2; | |
421 | string_append (decl, "return "); | |
422 | } | |
423 | ||
b55f9678 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') | |
f91ca6bc | 451 | return NULL; |
b55f9678 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++; | |
536 | mangled = dlang_type (decl, mangled); | |
537 | string_append (decl, "*"); | |
538 | return mangled; | |
539 | case 'I': /* ident T */ | |
540 | case 'C': /* class T */ | |
541 | case 'S': /* struct T */ | |
542 | case 'E': /* enum T */ | |
543 | case 'T': /* typedef T */ | |
544 | mangled++; | |
f91ca6bc | 545 | return dlang_parse_symbol (decl, mangled, dlang_type_name); |
b55f9678 | 546 | case 'D': /* delegate T */ |
f91ca6bc IB |
547 | { |
548 | string mods; | |
549 | size_t szmods; | |
b55f9678 | 550 | mangled++; |
f91ca6bc IB |
551 | |
552 | string_init (&mods); | |
553 | mangled = dlang_type_modifiers (&mods, mangled); | |
554 | szmods = string_length (&mods); | |
555 | ||
b55f9678 IB |
556 | mangled = dlang_function_type (decl, mangled); |
557 | string_append (decl, "delegate"); | |
f91ca6bc IB |
558 | string_appendn (decl, mods.b, szmods); |
559 | ||
560 | string_delete (&mods); | |
b55f9678 | 561 | return mangled; |
f91ca6bc | 562 | } |
b55f9678 IB |
563 | case 'B': /* tuple T */ |
564 | mangled++; | |
565 | return dlang_parse_tuple (decl, mangled); | |
566 | ||
567 | /* Function types */ | |
568 | case 'F': case 'U': case 'W': | |
569 | case 'V': case 'R': | |
570 | mangled = dlang_function_type (decl, mangled); | |
571 | string_append (decl, "function"); | |
572 | return mangled; | |
573 | ||
574 | /* Basic types */ | |
575 | case 'n': | |
576 | mangled++; | |
577 | string_append (decl, "none"); | |
578 | return mangled; | |
579 | case 'v': | |
580 | mangled++; | |
581 | string_append (decl, "void"); | |
582 | return mangled; | |
583 | case 'g': | |
584 | mangled++; | |
585 | string_append (decl, "byte"); | |
586 | return mangled; | |
587 | case 'h': | |
588 | mangled++; | |
589 | string_append (decl, "ubyte"); | |
590 | return mangled; | |
591 | case 's': | |
592 | mangled++; | |
593 | string_append (decl, "short"); | |
594 | return mangled; | |
595 | case 't': | |
596 | mangled++; | |
597 | string_append (decl, "ushort"); | |
598 | return mangled; | |
599 | case 'i': | |
600 | mangled++; | |
601 | string_append (decl, "int"); | |
602 | return mangled; | |
603 | case 'k': | |
604 | mangled++; | |
605 | string_append (decl, "uint"); | |
606 | return mangled; | |
607 | case 'l': | |
608 | mangled++; | |
609 | string_append (decl, "long"); | |
610 | return mangled; | |
611 | case 'm': | |
612 | mangled++; | |
613 | string_append (decl, "ulong"); | |
614 | return mangled; | |
615 | case 'f': | |
616 | mangled++; | |
617 | string_append (decl, "float"); | |
618 | return mangled; | |
619 | case 'd': | |
620 | mangled++; | |
621 | string_append (decl, "double"); | |
622 | return mangled; | |
623 | case 'e': | |
624 | mangled++; | |
625 | string_append (decl, "real"); | |
626 | return mangled; | |
627 | ||
628 | /* Imaginary and Complex types */ | |
629 | case 'o': | |
630 | mangled++; | |
631 | string_append (decl, "ifloat"); | |
632 | return mangled; | |
633 | case 'p': | |
634 | mangled++; | |
635 | string_append (decl, "idouble"); | |
636 | return mangled; | |
637 | case 'j': | |
638 | mangled++; | |
639 | string_append (decl, "ireal"); | |
640 | return mangled; | |
641 | case 'q': | |
642 | mangled++; | |
643 | string_append (decl, "cfloat"); | |
644 | return mangled; | |
645 | case 'r': | |
646 | mangled++; | |
647 | string_append (decl, "cdouble"); | |
648 | return mangled; | |
649 | case 'c': | |
650 | mangled++; | |
651 | string_append (decl, "creal"); | |
652 | return mangled; | |
653 | ||
654 | /* Other types */ | |
655 | case 'b': | |
656 | mangled++; | |
657 | string_append (decl, "bool"); | |
658 | return mangled; | |
659 | case 'a': | |
660 | mangled++; | |
661 | string_append (decl, "char"); | |
662 | return mangled; | |
663 | case 'u': | |
664 | mangled++; | |
665 | string_append (decl, "wchar"); | |
666 | return mangled; | |
667 | case 'w': | |
668 | mangled++; | |
669 | string_append (decl, "dchar"); | |
670 | return mangled; | |
f91ca6bc IB |
671 | case 'z': |
672 | mangled++; | |
673 | switch (*mangled) | |
674 | { | |
675 | case 'i': | |
676 | mangled++; | |
677 | string_append (decl, "cent"); | |
678 | return mangled; | |
679 | case 'k': | |
680 | mangled++; | |
681 | string_append (decl, "ucent"); | |
682 | return mangled; | |
683 | } | |
684 | return NULL; | |
b55f9678 IB |
685 | |
686 | default: /* unhandled */ | |
687 | return NULL; | |
688 | } | |
689 | } | |
690 | ||
691 | /* Extract the identifier from MANGLED and append it to DECL. | |
692 | Return the remaining string on success or NULL on failure. */ | |
693 | static const char * | |
f91ca6bc IB |
694 | dlang_identifier (string *decl, const char *mangled, |
695 | enum dlang_symbol_kinds kind) | |
b55f9678 | 696 | { |
f91ca6bc IB |
697 | char *endptr; |
698 | long len; | |
699 | ||
b55f9678 | 700 | if (mangled == NULL || *mangled == '\0') |
f91ca6bc | 701 | return NULL; |
b55f9678 | 702 | |
f91ca6bc IB |
703 | len = strtol (mangled, &endptr, 10); |
704 | ||
705 | if (endptr == NULL || len <= 0) | |
706 | return NULL; | |
707 | ||
708 | /* In template parameter symbols, the first character of the mangled | |
709 | name can be a digit. This causes ambiguity issues because the | |
710 | digits of the two numbers are adjacent. */ | |
711 | if (kind == dlang_template_param) | |
b55f9678 | 712 | { |
f91ca6bc IB |
713 | long psize = len; |
714 | char *pend; | |
715 | int saved = string_length (decl); | |
b55f9678 | 716 | |
f91ca6bc IB |
717 | /* Work backwards until a match is found. */ |
718 | for (pend = endptr; endptr != NULL; pend--) | |
719 | { | |
720 | mangled = pend; | |
721 | ||
722 | /* Reached the beginning of the pointer to the name length, | |
723 | try parsing the entire symbol. */ | |
724 | if (psize == 0) | |
725 | { | |
726 | psize = len; | |
727 | pend = endptr; | |
728 | endptr = NULL; | |
729 | } | |
730 | ||
731 | /* Check whether template parameter is a function with a valid | |
732 | return type or an untyped identifier. */ | |
733 | if (ISDIGIT (*mangled)) | |
734 | mangled = dlang_parse_symbol (decl, mangled, dlang_template_ident); | |
735 | else if (strncmp (mangled, "_D", 2) == 0) | |
736 | { | |
737 | mangled += 2; | |
738 | mangled = dlang_parse_symbol (decl, mangled, dlang_function); | |
739 | } | |
740 | ||
741 | /* Check for name length mismatch. */ | |
742 | if (mangled && (mangled - pend) == psize) | |
743 | return mangled; | |
744 | ||
745 | psize /= 10; | |
746 | string_setlength (decl, saved); | |
747 | } | |
748 | ||
749 | /* No match on any combinations. */ | |
750 | return NULL; | |
751 | } | |
752 | else | |
753 | { | |
754 | if (strlen (endptr) < (size_t) len) | |
b55f9678 IB |
755 | return NULL; |
756 | ||
757 | mangled = endptr; | |
758 | ||
759 | /* May be a template instance. */ | |
f91ca6bc | 760 | if (len >= 5 && strncmp (mangled, "__T", 3) == 0) |
b55f9678 IB |
761 | { |
762 | /* Template symbol. */ | |
763 | if (ISDIGIT (mangled[3]) && mangled[3] != '0') | |
f91ca6bc | 764 | return dlang_parse_template (decl, mangled, len); |
b55f9678 IB |
765 | |
766 | return NULL; | |
767 | } | |
768 | ||
f91ca6bc | 769 | switch (len) |
b55f9678 | 770 | { |
f91ca6bc IB |
771 | case 6: |
772 | if (strncmp (mangled, "__ctor", len) == 0) | |
773 | { | |
774 | /* Constructor symbol for a class/struct. */ | |
775 | string_append (decl, "this"); | |
776 | mangled += len; | |
777 | return mangled; | |
778 | } | |
779 | else if (strncmp (mangled, "__dtor", len) == 0) | |
780 | { | |
781 | /* Destructor symbol for a class/struct. */ | |
782 | string_append (decl, "~this"); | |
783 | mangled += len; | |
784 | return mangled; | |
785 | } | |
786 | else if (strncmp (mangled, "__initZ", len+1) == 0) | |
787 | { | |
788 | /* The static initialiser for a given symbol. */ | |
789 | string_append (decl, "init$"); | |
790 | mangled += len; | |
791 | return mangled; | |
792 | } | |
793 | else if (strncmp (mangled, "__vtblZ", len+1) == 0) | |
794 | { | |
795 | /* The vtable symbol for a given class. */ | |
796 | string_prepend (decl, "vtable for "); | |
797 | string_setlength (decl, string_length (decl) - 1); | |
798 | mangled += len; | |
799 | return mangled; | |
800 | } | |
801 | break; | |
802 | ||
803 | case 7: | |
804 | if (strncmp (mangled, "__ClassZ", len+1) == 0) | |
805 | { | |
806 | /* The classinfo symbol for a given class. */ | |
807 | string_prepend (decl, "ClassInfo for "); | |
808 | string_setlength (decl, string_length (decl) - 1); | |
809 | mangled += len; | |
810 | return mangled; | |
811 | } | |
812 | break; | |
813 | ||
814 | case 10: | |
815 | if (strncmp (mangled, "__postblitMFZ", len+3) == 0) | |
816 | { | |
817 | /* Postblit symbol for a struct. */ | |
818 | string_append (decl, "this(this)"); | |
819 | mangled += len + 3; | |
820 | return mangled; | |
821 | } | |
822 | break; | |
823 | ||
824 | case 11: | |
825 | if (strncmp (mangled, "__InterfaceZ", len+1) == 0) | |
826 | { | |
827 | /* The interface symbol for a given class. */ | |
828 | string_prepend (decl, "Interface for "); | |
829 | string_setlength (decl, string_length (decl) - 1); | |
830 | mangled += len; | |
831 | return mangled; | |
832 | } | |
833 | break; | |
834 | ||
835 | case 12: | |
836 | if (strncmp (mangled, "__ModuleInfoZ", len+1) == 0) | |
837 | { | |
838 | /* The ModuleInfo symbol for a given module. */ | |
839 | string_prepend (decl, "ModuleInfo for "); | |
840 | string_setlength (decl, string_length (decl) - 1); | |
841 | mangled += len; | |
842 | return mangled; | |
843 | } | |
844 | break; | |
b55f9678 IB |
845 | } |
846 | ||
f91ca6bc IB |
847 | string_appendn (decl, mangled, len); |
848 | mangled += len; | |
b55f9678 | 849 | } |
b55f9678 IB |
850 | |
851 | return mangled; | |
852 | } | |
853 | ||
854 | /* Extract the integer value from MANGLED and append it to DECL, | |
855 | where TYPE is the type it should be represented as. | |
856 | Return the remaining string on success or NULL on failure. */ | |
857 | static const char * | |
858 | dlang_parse_integer (string *decl, const char *mangled, char type) | |
859 | { | |
860 | if (type == 'a' || type == 'u' || type == 'w') | |
861 | { | |
862 | /* Parse character value. */ | |
863 | char value[10]; | |
864 | int pos = 10; | |
865 | int width = 0; | |
866 | char *endptr; | |
867 | long val = strtol (mangled, &endptr, 10); | |
868 | ||
869 | if (endptr == NULL || val < 0) | |
870 | return NULL; | |
871 | ||
872 | string_append (decl, "'"); | |
873 | ||
874 | if (type == 'a' && val >= 0x20 && val < 0x7F) | |
875 | { | |
876 | /* Represent as a character literal. */ | |
877 | char c = (char) val; | |
878 | string_appendn (decl, &c, 1); | |
879 | } | |
880 | else | |
881 | { | |
882 | /* Represent as a hexadecimal value. */ | |
883 | switch (type) | |
884 | { | |
885 | case 'a': /* char */ | |
886 | string_append (decl, "\\x"); | |
887 | width = 2; | |
888 | break; | |
889 | case 'u': /* wchar */ | |
890 | string_append (decl, "\\u"); | |
891 | width = 4; | |
892 | break; | |
893 | case 'w': /* dchar */ | |
894 | string_append (decl, "\\U"); | |
895 | width = 8; | |
896 | break; | |
897 | } | |
898 | ||
899 | while (val > 0) | |
900 | { | |
901 | int digit = val % 16; | |
902 | ||
903 | if (digit < 10) | |
904 | value[--pos] = (char)(digit + '0'); | |
905 | else | |
906 | value[--pos] = (char)((digit - 10) + 'a'); | |
907 | ||
908 | val /= 16; | |
909 | width--; | |
910 | } | |
911 | ||
912 | for (; width > 0; width--) | |
913 | value[--pos] = '0'; | |
914 | ||
915 | string_appendn (decl, &(value[pos]), 10 - pos); | |
916 | } | |
917 | string_append (decl, "'"); | |
918 | mangled = endptr; | |
919 | } | |
920 | else if (type == 'b') | |
921 | { | |
922 | /* Parse boolean value. */ | |
923 | char *endptr; | |
924 | long val = strtol (mangled, &endptr, 10); | |
925 | ||
926 | if (endptr == NULL || val < 0) | |
927 | return NULL; | |
928 | ||
929 | string_append (decl, val ? "true" : "false"); | |
930 | mangled = endptr; | |
931 | } | |
932 | else | |
933 | { | |
934 | /* Parse integer value. */ | |
935 | const char *numptr = mangled; | |
936 | size_t num = 0; | |
937 | ||
938 | while (ISDIGIT (*mangled)) | |
939 | { | |
940 | num++; | |
941 | mangled++; | |
942 | } | |
943 | string_appendn (decl, numptr, num); | |
944 | ||
945 | /* Append suffix. */ | |
946 | switch (type) | |
947 | { | |
948 | case 'h': /* ubyte */ | |
949 | case 't': /* ushort */ | |
950 | case 'k': /* uint */ | |
951 | string_append (decl, "u"); | |
952 | break; | |
953 | case 'l': /* long */ | |
954 | string_append (decl, "L"); | |
955 | break; | |
956 | case 'm': /* ulong */ | |
957 | string_append (decl, "uL"); | |
958 | break; | |
959 | } | |
960 | } | |
961 | ||
962 | return mangled; | |
963 | } | |
964 | ||
965 | /* Extract the floating-point value from MANGLED and append it to DECL. | |
966 | Return the remaining string on success or NULL on failure. */ | |
967 | static const char * | |
968 | dlang_parse_real (string *decl, const char *mangled) | |
969 | { | |
970 | char buffer[64]; | |
971 | int len = 0; | |
b55f9678 IB |
972 | |
973 | /* Handle NAN and +-INF. */ | |
974 | if (strncmp (mangled, "NAN", 3) == 0) | |
975 | { | |
976 | string_append (decl, "NaN"); | |
977 | mangled += 3; | |
978 | return mangled; | |
979 | } | |
980 | else if (strncmp (mangled, "INF", 3) == 0) | |
981 | { | |
982 | string_append (decl, "Inf"); | |
983 | mangled += 3; | |
984 | return mangled; | |
985 | } | |
986 | else if (strncmp (mangled, "NINF", 4) == 0) | |
987 | { | |
988 | string_append (decl, "-Inf"); | |
989 | mangled += 4; | |
990 | return mangled; | |
991 | } | |
992 | ||
993 | /* Hexadecimal prefix and leading bit. */ | |
994 | if (*mangled == 'N') | |
995 | { | |
996 | buffer[len++] = '-'; | |
997 | mangled++; | |
998 | } | |
999 | ||
1000 | if (!ISXDIGIT (*mangled)) | |
1001 | return NULL; | |
1002 | ||
1003 | buffer[len++] = '0'; | |
1004 | buffer[len++] = 'x'; | |
1005 | buffer[len++] = *mangled; | |
1006 | buffer[len++] = '.'; | |
1007 | mangled++; | |
1008 | ||
1009 | /* Significand. */ | |
1010 | while (ISXDIGIT (*mangled)) | |
1011 | { | |
1012 | buffer[len++] = *mangled; | |
1013 | mangled++; | |
1014 | } | |
1015 | ||
1016 | /* Exponent. */ | |
1017 | if (*mangled != 'P') | |
1018 | return NULL; | |
1019 | ||
1020 | buffer[len++] = 'p'; | |
1021 | mangled++; | |
1022 | ||
1023 | if (*mangled == 'N') | |
1024 | { | |
1025 | buffer[len++] = '-'; | |
1026 | mangled++; | |
1027 | } | |
1028 | ||
1029 | while (ISDIGIT (*mangled)) | |
1030 | { | |
1031 | buffer[len++] = *mangled; | |
1032 | mangled++; | |
1033 | } | |
1034 | ||
30379291 IB |
1035 | /* Write out the demangled hexadecimal, rather than trying to |
1036 | convert the buffer into a floating-point value. */ | |
b55f9678 | 1037 | buffer[len] = '\0'; |
30379291 | 1038 | len = strlen (buffer); |
b55f9678 IB |
1039 | string_appendn (decl, buffer, len); |
1040 | return mangled; | |
1041 | } | |
1042 | ||
1043 | /* Convert VAL from an ascii hexdigit to value. */ | |
1044 | static char | |
1045 | ascii2hex (char val) | |
1046 | { | |
1047 | if (val >= 'a' && val <= 'f') | |
1048 | return (val - 'a' + 10); | |
1049 | ||
1050 | if (val >= 'A' && val <= 'F') | |
1051 | return (val - 'A' + 10); | |
1052 | ||
1053 | if (val >= '0' && val <= '9') | |
1054 | return (val - '0'); | |
1055 | ||
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | /* Extract the string value from MANGLED and append it to DECL. | |
1060 | Return the remaining string on success or NULL on failure. */ | |
1061 | static const char * | |
1062 | dlang_parse_string (string *decl, const char *mangled) | |
1063 | { | |
1064 | char type = *mangled; | |
1065 | char *endptr; | |
1066 | long len; | |
1067 | ||
1068 | mangled++; | |
1069 | len = strtol (mangled, &endptr, 10); | |
1070 | ||
1071 | if (endptr == NULL || len < 0) | |
1072 | return NULL; | |
1073 | ||
1074 | mangled = endptr; | |
1075 | if (*mangled != '_') | |
1076 | return NULL; | |
1077 | ||
1078 | mangled++; | |
1079 | string_append (decl, "\""); | |
1080 | while (len--) | |
1081 | { | |
1082 | if (ISXDIGIT (mangled[0]) && ISXDIGIT (mangled[1])) | |
1083 | { | |
1084 | char a = ascii2hex (mangled[0]); | |
1085 | char b = ascii2hex (mangled[1]); | |
1086 | char val = (a << 4) | b; | |
f91ca6bc IB |
1087 | |
1088 | /* Sanitize white and non-printable characters. */ | |
1089 | switch (val) | |
1090 | { | |
1091 | case ' ': | |
1092 | string_append (decl, " "); | |
1093 | break; | |
1094 | case '\t': | |
1095 | string_append (decl, "\\t"); | |
1096 | break; | |
1097 | case '\n': | |
1098 | string_append (decl, "\\n"); | |
1099 | break; | |
1100 | case '\r': | |
1101 | string_append (decl, "\\r"); | |
1102 | break; | |
1103 | case '\f': | |
1104 | string_append (decl, "\\f"); | |
1105 | break; | |
1106 | case '\v': | |
1107 | string_append (decl, "\\v"); | |
1108 | break; | |
1109 | ||
1110 | default: | |
1111 | if (ISPRINT (val)) | |
1112 | string_appendn (decl, &val, 1); | |
1113 | else | |
1114 | { | |
1115 | string_append (decl, "\\x"); | |
1116 | string_appendn (decl, mangled, 2); | |
1117 | } | |
1118 | } | |
b55f9678 IB |
1119 | } |
1120 | else | |
1121 | return NULL; | |
1122 | ||
1123 | mangled += 2; | |
1124 | } | |
1125 | string_append (decl, "\""); | |
1126 | ||
1127 | if (type != 'a') | |
1128 | string_appendn (decl, &type, 1); | |
1129 | ||
1130 | return mangled; | |
1131 | } | |
1132 | ||
1133 | /* Extract the static array value from MANGLED and append it to DECL. | |
1134 | Return the remaining string on success or NULL on failure. */ | |
1135 | static const char * | |
1136 | dlang_parse_arrayliteral (string *decl, const char *mangled) | |
1137 | { | |
1138 | char *endptr; | |
1139 | long elements = strtol (mangled, &endptr, 10); | |
1140 | ||
1141 | if (endptr == NULL || elements < 0) | |
1142 | return NULL; | |
1143 | ||
1144 | mangled = endptr; | |
1145 | string_append (decl, "["); | |
1146 | while (elements--) | |
1147 | { | |
1148 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1149 | if (elements != 0) | |
1150 | string_append (decl, ", "); | |
1151 | } | |
1152 | ||
1153 | string_append (decl, "]"); | |
1154 | return mangled; | |
1155 | } | |
1156 | ||
1157 | /* Extract the associative array value from MANGLED and append it to DECL. | |
1158 | Return the remaining string on success or NULL on failure. */ | |
1159 | static const char * | |
1160 | dlang_parse_assocarray (string *decl, const char *mangled) | |
1161 | { | |
1162 | char *endptr; | |
1163 | long elements = strtol (mangled, &endptr, 10); | |
1164 | ||
1165 | if (endptr == NULL || elements < 0) | |
1166 | return NULL; | |
1167 | ||
1168 | mangled = endptr; | |
1169 | string_append (decl, "["); | |
1170 | while (elements--) | |
1171 | { | |
1172 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1173 | string_append (decl, ":"); | |
1174 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1175 | ||
1176 | if (elements != 0) | |
1177 | string_append (decl, ", "); | |
1178 | } | |
1179 | ||
1180 | string_append (decl, "]"); | |
1181 | return mangled; | |
1182 | } | |
1183 | ||
1184 | /* Extract the struct literal value for NAME from MANGLED and append it to DECL. | |
1185 | Return the remaining string on success or NULL on failure. */ | |
1186 | static const char * | |
1187 | dlang_parse_structlit (string *decl, const char *mangled, const char *name) | |
1188 | { | |
1189 | char *endptr; | |
1190 | long args = strtol (mangled, &endptr, 10); | |
1191 | ||
1192 | if (endptr == NULL || args < 0) | |
1193 | return NULL; | |
1194 | ||
1195 | mangled = endptr; | |
1196 | if (name != NULL) | |
1197 | string_append (decl, name); | |
1198 | ||
1199 | string_append (decl, "("); | |
1200 | while (args--) | |
1201 | { | |
1202 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
1203 | if (args != 0) | |
1204 | string_append (decl, ", "); | |
1205 | } | |
1206 | ||
1207 | string_append (decl, ")"); | |
1208 | return mangled; | |
1209 | } | |
1210 | ||
1211 | /* Extract the value from MANGLED and append it to DECL. | |
1212 | Return the remaining string on success or NULL on failure. */ | |
1213 | static const char * | |
1214 | dlang_value (string *decl, const char *mangled, const char *name, char type) | |
1215 | { | |
1216 | if (mangled == NULL || *mangled == '\0') | |
f91ca6bc | 1217 | return NULL; |
b55f9678 IB |
1218 | |
1219 | switch (*mangled) | |
1220 | { | |
1221 | /* Null value. */ | |
1222 | case 'n': | |
1223 | mangled++; | |
1224 | string_append (decl, "null"); | |
1225 | break; | |
1226 | ||
1227 | /* Integral values. */ | |
1228 | case 'N': | |
1229 | mangled++; | |
1230 | string_append (decl, "-"); | |
1231 | mangled = dlang_parse_integer (decl, mangled, type); | |
1232 | break; | |
1233 | ||
1234 | case 'i': | |
1235 | mangled++; | |
1236 | if (*mangled < '0' || *mangled > '9') | |
1237 | return NULL; | |
1238 | /* Fall through */ | |
1239 | case '0': case '1': case '2': case '3': case '4': | |
1240 | case '5': case '6': case '7': case '8': case '9': | |
1241 | mangled = dlang_parse_integer (decl, mangled, type); | |
1242 | break; | |
1243 | ||
1244 | /* Real value. */ | |
1245 | case 'e': | |
1246 | mangled++; | |
1247 | mangled = dlang_parse_real (decl, mangled); | |
1248 | break; | |
1249 | ||
1250 | /* Complex value. */ | |
1251 | case 'c': | |
1252 | mangled++; | |
1253 | mangled = dlang_parse_real (decl, mangled); | |
1254 | string_append (decl, "+"); | |
1255 | if (mangled == NULL || *mangled != 'c') | |
1256 | return NULL; | |
1257 | mangled++; | |
1258 | mangled = dlang_parse_real (decl, mangled); | |
1259 | string_append (decl, "i"); | |
1260 | break; | |
1261 | ||
1262 | /* String values. */ | |
1263 | case 'a': /* UTF8 */ | |
1264 | case 'w': /* UTF16 */ | |
1265 | case 'd': /* UTF32 */ | |
1266 | mangled = dlang_parse_string (decl, mangled); | |
1267 | break; | |
1268 | ||
1269 | /* Array values. */ | |
1270 | case 'A': | |
1271 | mangled++; | |
1272 | if (type == 'H') | |
1273 | mangled = dlang_parse_assocarray (decl, mangled); | |
1274 | else | |
1275 | mangled = dlang_parse_arrayliteral (decl, mangled); | |
1276 | break; | |
1277 | ||
1278 | /* Struct values. */ | |
1279 | case 'S': | |
1280 | mangled++; | |
1281 | mangled = dlang_parse_structlit (decl, mangled, name); | |
1282 | break; | |
1283 | ||
1284 | default: | |
1285 | return NULL; | |
1286 | } | |
1287 | ||
1288 | return mangled; | |
1289 | } | |
1290 | ||
f91ca6bc IB |
1291 | /* Extract the type modifiers from MANGLED and return the string |
1292 | length that it consumes in MANGLED on success or 0 on failure. */ | |
b55f9678 | 1293 | static int |
f91ca6bc | 1294 | dlang_type_modifier_p (const char *mangled) |
b55f9678 | 1295 | { |
f91ca6bc | 1296 | int i; |
b55f9678 IB |
1297 | |
1298 | switch (*mangled) | |
1299 | { | |
f91ca6bc | 1300 | case 'x': case 'y': |
b55f9678 IB |
1301 | return 1; |
1302 | ||
f91ca6bc IB |
1303 | case 'O': |
1304 | mangled++; | |
1305 | i = dlang_type_modifier_p (mangled); | |
1306 | return i + 1; | |
b55f9678 | 1307 | |
f91ca6bc IB |
1308 | case 'N': |
1309 | mangled++; | |
1310 | if (*mangled == 'g') | |
b55f9678 | 1311 | { |
f91ca6bc IB |
1312 | mangled++; |
1313 | i = dlang_type_modifier_p (mangled); | |
1314 | return i + 2; | |
b55f9678 | 1315 | } |
f91ca6bc IB |
1316 | } |
1317 | ||
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | /* Extract the function calling convention from MANGLED and | |
1322 | return 1 on success or 0 on failure. */ | |
1323 | static int | |
1324 | dlang_call_convention_p (const char *mangled) | |
1325 | { | |
1326 | /* Prefix for functions needing 'this' */ | |
1327 | if (*mangled == 'M') | |
1328 | { | |
1329 | mangled++; | |
1330 | /* Also skip over any type modifiers. */ | |
1331 | mangled += dlang_type_modifier_p (mangled); | |
1332 | } | |
1333 | ||
1334 | switch (*mangled) | |
1335 | { | |
1336 | case 'F': case 'U': case 'V': | |
1337 | case 'W': case 'R': | |
1338 | return 1; | |
b55f9678 IB |
1339 | |
1340 | default: | |
1341 | return 0; | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | /* Extract and demangle the symbol in MANGLED and append it to DECL. | |
1346 | Returns the remaining signature on success or NULL on failure. */ | |
1347 | static const char * | |
f91ca6bc IB |
1348 | dlang_parse_symbol (string *decl, const char *mangled, |
1349 | enum dlang_symbol_kinds kind) | |
b55f9678 | 1350 | { |
f91ca6bc | 1351 | int saved; |
b55f9678 IB |
1352 | size_t n = 0; |
1353 | do | |
1354 | { | |
1355 | if (n++) | |
1356 | string_append (decl, "."); | |
1357 | ||
f91ca6bc | 1358 | mangled = dlang_identifier (decl, mangled, kind); |
b55f9678 IB |
1359 | |
1360 | if (mangled && dlang_call_convention_p (mangled)) | |
1361 | { | |
f91ca6bc IB |
1362 | string mods; |
1363 | const char *start = NULL; | |
1364 | int checkpoint = 0; | |
b55f9678 IB |
1365 | |
1366 | /* Skip over 'this' parameter. */ | |
1367 | if (*mangled == 'M') | |
f91ca6bc IB |
1368 | mangled++; |
1369 | ||
1370 | /* We have reached here because we expect an extern(Pascal) function. | |
1371 | However this is so rare, that it is more likely a template value | |
1372 | parameter. Since this can't be assumed, first attempt parsing | |
1373 | the symbol as a function, and then back out on failure. */ | |
1374 | if (*mangled == 'V') | |
1375 | { | |
1376 | start = mangled; | |
1377 | checkpoint = string_length (decl); | |
1378 | } | |
1379 | ||
1380 | /* Save the type modifiers for appending at the end. */ | |
1381 | string_init (&mods); | |
1382 | mangled = dlang_type_modifiers (&mods, mangled); | |
b55f9678 IB |
1383 | |
1384 | /* Skip over calling convention and attributes in qualified name. */ | |
1385 | saved = string_length (decl); | |
1386 | mangled = dlang_call_convention (decl, mangled); | |
1387 | mangled = dlang_attributes (decl, mangled); | |
1388 | string_setlength (decl, saved); | |
1389 | ||
1390 | string_append (decl, "("); | |
1391 | mangled = dlang_function_args (decl, mangled); | |
1392 | string_append (decl, ")"); | |
1393 | ||
f91ca6bc IB |
1394 | /* Add any const/immutable/shared modifier. */ |
1395 | string_appendn (decl, mods.b, string_length (&mods)); | |
1396 | string_delete (&mods); | |
1397 | ||
1398 | if (mangled == NULL && checkpoint != 0) | |
b55f9678 | 1399 | { |
f91ca6bc IB |
1400 | mangled = start; |
1401 | string_setlength (decl, checkpoint); | |
b55f9678 IB |
1402 | } |
1403 | } | |
1404 | } | |
1405 | while (mangled && ISDIGIT (*mangled)); | |
1406 | ||
f91ca6bc IB |
1407 | /* Only top-level symbols or function template parameters have |
1408 | a type that needs checking. */ | |
1409 | if (kind == dlang_top_level || kind == dlang_function) | |
1410 | { | |
1411 | /* Artificial symbols end with 'Z' and have no type. */ | |
1412 | if (mangled && *mangled == 'Z') | |
1413 | mangled++; | |
1414 | else | |
1415 | { | |
1416 | saved = string_length (decl); | |
1417 | mangled = dlang_type (decl, mangled); | |
1418 | string_setlength (decl, saved); | |
1419 | } | |
1420 | ||
1421 | /* Check that the entire symbol was successfully demangled. */ | |
1422 | if (kind == dlang_top_level) | |
1423 | { | |
1424 | if (mangled == NULL || *mangled != '\0') | |
1425 | return NULL; | |
1426 | } | |
1427 | } | |
1428 | ||
b55f9678 IB |
1429 | return mangled; |
1430 | } | |
1431 | ||
1432 | /* Demangle the tuple from MANGLED and append it to DECL. | |
1433 | Return the remaining string on success or NULL on failure. */ | |
1434 | static const char * | |
1435 | dlang_parse_tuple (string *decl, const char *mangled) | |
1436 | { | |
1437 | char *endptr; | |
1438 | long elements = strtol (mangled, &endptr, 10); | |
1439 | ||
1440 | if (endptr == NULL || elements < 0) | |
1441 | return NULL; | |
1442 | ||
1443 | mangled = endptr; | |
1444 | string_append (decl, "Tuple!("); | |
1445 | ||
1446 | while (elements--) | |
1447 | { | |
1448 | mangled = dlang_type (decl, mangled); | |
1449 | if (elements != 0) | |
1450 | string_append (decl, ", "); | |
1451 | } | |
1452 | ||
1453 | string_append (decl, ")"); | |
1454 | return mangled; | |
1455 | } | |
1456 | ||
1457 | /* Demangle the argument list from MANGLED and append it to DECL. | |
1458 | Return the remaining string on success or NULL on failure. */ | |
1459 | static const char * | |
1460 | dlang_template_args (string *decl, const char *mangled) | |
1461 | { | |
1462 | size_t n = 0; | |
1463 | ||
1464 | while (mangled && *mangled != '\0') | |
1465 | { | |
1466 | switch (*mangled) | |
1467 | { | |
1468 | case 'Z': /* End of parameter list. */ | |
1469 | mangled++; | |
1470 | return mangled; | |
1471 | } | |
1472 | ||
1473 | if (n++) | |
1474 | string_append (decl, ", "); | |
1475 | ||
f91ca6bc IB |
1476 | /* Skip over specialised template prefix. */ |
1477 | if (*mangled == 'H') | |
1478 | mangled++; | |
1479 | ||
b55f9678 IB |
1480 | switch (*mangled) |
1481 | { | |
1482 | case 'S': /* Symbol parameter. */ | |
1483 | mangled++; | |
f91ca6bc | 1484 | mangled = dlang_parse_symbol (decl, mangled, dlang_template_param); |
b55f9678 IB |
1485 | break; |
1486 | case 'T': /* Type parameter. */ | |
1487 | mangled++; | |
1488 | mangled = dlang_type (decl, mangled); | |
1489 | break; | |
1490 | case 'V': /* Value parameter. */ | |
1491 | { | |
1492 | string name; | |
1493 | char type; | |
1494 | ||
1495 | /* Peek at the type. */ | |
1496 | mangled++; | |
1497 | type = *mangled; | |
1498 | ||
1499 | /* In the few instances where the type is actually desired in | |
1500 | the output, it should precede the value from dlang_value. */ | |
1501 | string_init (&name); | |
1502 | mangled = dlang_type (&name, mangled); | |
1503 | string_need (&name, 1); | |
1504 | *(name.p) = '\0'; | |
1505 | ||
1506 | mangled = dlang_value (decl, mangled, name.b, type); | |
1507 | string_delete (&name); | |
1508 | break; | |
1509 | } | |
1510 | ||
1511 | default: | |
1512 | return NULL; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | return mangled; | |
1517 | } | |
1518 | ||
1519 | /* Extract and demangle the template symbol in MANGLED, expected to | |
1520 | be made up of LEN characters, and append it to DECL. | |
1521 | Returns the remaining signature on success or NULL on failure. */ | |
1522 | static const char * | |
1523 | dlang_parse_template (string *decl, const char *mangled, long len) | |
1524 | { | |
1525 | const char *start = mangled; | |
1526 | ||
1527 | /* Template instance names have the types and values of its parameters | |
1528 | encoded into it. | |
1529 | ||
1530 | TemplateInstanceName: | |
1531 | Number __T LName TemplateArgs Z | |
1532 | ^ | |
1533 | The start pointer should be at the above location, and LEN should be | |
1534 | the value of the decoded number. | |
1535 | */ | |
1536 | if (strncmp (mangled, "__T", 3) != 0) | |
1537 | return NULL; | |
1538 | ||
1539 | mangled += 3; | |
1540 | ||
1541 | /* Template identifier. */ | |
f91ca6bc | 1542 | mangled = dlang_identifier (decl, mangled, dlang_template_ident); |
b55f9678 IB |
1543 | |
1544 | /* Template arguments. */ | |
1545 | string_append (decl, "!("); | |
1546 | mangled = dlang_template_args (decl, mangled); | |
1547 | string_append (decl, ")"); | |
1548 | ||
1549 | /* Check for template name length mismatch. */ | |
1550 | if (mangled && (mangled - start) != len) | |
1551 | return NULL; | |
1552 | ||
1553 | return mangled; | |
1554 | } | |
1555 | ||
1556 | /* Extract and demangle the symbol in MANGLED. Returns the demangled | |
1557 | signature on success or NULL on failure. */ | |
1558 | ||
1559 | char * | |
1560 | dlang_demangle (const char *mangled, int option ATTRIBUTE_UNUSED) | |
1561 | { | |
1562 | string decl; | |
1563 | char *demangled = NULL; | |
1564 | ||
1565 | if (mangled == NULL || *mangled == '\0') | |
1566 | return NULL; | |
1567 | ||
1568 | if (strncmp (mangled, "_D", 2) != 0) | |
1569 | return NULL; | |
1570 | ||
1571 | string_init (&decl); | |
1572 | ||
1573 | if (strcmp (mangled, "_Dmain") == 0) | |
1574 | { | |
1575 | string_append (&decl, "D main"); | |
1576 | } | |
1577 | else | |
1578 | { | |
1579 | mangled += 2; | |
1580 | ||
f91ca6bc | 1581 | if (dlang_parse_symbol (&decl, mangled, dlang_top_level) == NULL) |
b55f9678 IB |
1582 | string_delete (&decl); |
1583 | } | |
1584 | ||
1585 | if (string_length (&decl) > 0) | |
1586 | { | |
1587 | string_need (&decl, 1); | |
1588 | *(decl.p) = '\0'; | |
1589 | demangled = decl.b; | |
1590 | } | |
1591 | ||
1592 | return demangled; | |
1593 | } | |
1594 |