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43b1b9ed | 1 | /* Demangler for the D programming language |
8d9254fc | 2 | Copyright (C) 2014-2020 Free Software Foundation, Inc. |
43b1b9ed IB |
3 | Written by Iain Buclaw (ibuclaw@gdcproject.org) |
4 | ||
5 | This file is part of the libiberty library. | |
6 | Libiberty is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Library General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2 of the License, or (at your option) any later version. | |
10 | ||
11 | In addition to the permissions in the GNU Library General Public | |
12 | License, the Free Software Foundation gives you unlimited permission | |
13 | to link the compiled version of this file into combinations with other | |
14 | programs, and to distribute those combinations without any restriction | |
15 | coming from the use of this file. (The Library Public License | |
16 | restrictions do apply in other respects; for example, they cover | |
17 | modification of the file, and distribution when not linked into a | |
18 | combined executable.) | |
19 | ||
20 | Libiberty is distributed in the hope that it will be useful, | |
21 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
23 | Library General Public License for more details. | |
24 | ||
25 | You should have received a copy of the GNU Library General Public | |
26 | License along with libiberty; see the file COPYING.LIB. | |
27 | If not, see <http://www.gnu.org/licenses/>. */ | |
28 | ||
dbe65f77 | 29 | /* This file exports one function; dlang_demangle. */ |
43b1b9ed IB |
30 | |
31 | #ifdef HAVE_CONFIG_H | |
32 | #include "config.h" | |
33 | #endif | |
34 | ||
35 | #include "safe-ctype.h" | |
36 | ||
37 | #include <sys/types.h> | |
38 | #include <string.h> | |
39 | #include <stdio.h> | |
40 | ||
41 | #ifdef HAVE_STDLIB_H | |
42 | #include <stdlib.h> | |
43b1b9ed IB |
43 | #endif |
44 | ||
45 | #include <demangle.h> | |
46 | #include "libiberty.h" | |
47 | ||
48 | /* A mini string-handling package */ | |
49 | ||
50 | typedef struct string /* Beware: these aren't required to be */ | |
51 | { /* '\0' terminated. */ | |
52 | char *b; /* pointer to start of string */ | |
53 | char *p; /* pointer after last character */ | |
54 | char *e; /* pointer after end of allocated space */ | |
55 | } string; | |
56 | ||
57 | static void | |
58 | string_need (string *s, int n) | |
59 | { | |
60 | int tem; | |
61 | ||
62 | if (s->b == NULL) | |
63 | { | |
64 | if (n < 32) | |
65 | { | |
66 | n = 32; | |
67 | } | |
68 | s->p = s->b = XNEWVEC (char, n); | |
69 | s->e = s->b + n; | |
70 | } | |
71 | else if (s->e - s->p < n) | |
72 | { | |
73 | tem = s->p - s->b; | |
74 | n += tem; | |
75 | n *= 2; | |
76 | s->b = XRESIZEVEC (char, s->b, n); | |
77 | s->p = s->b + tem; | |
78 | s->e = s->b + n; | |
79 | } | |
80 | } | |
81 | ||
82 | static void | |
83 | string_delete (string *s) | |
84 | { | |
85 | if (s->b != NULL) | |
86 | { | |
87 | XDELETEVEC (s->b); | |
88 | s->b = s->e = s->p = NULL; | |
89 | } | |
90 | } | |
91 | ||
92 | static void | |
93 | string_init (string *s) | |
94 | { | |
95 | s->b = s->p = s->e = NULL; | |
96 | } | |
97 | ||
98 | static int | |
99 | string_length (string *s) | |
100 | { | |
101 | if (s->p == s->b) | |
102 | { | |
103 | return 0; | |
104 | } | |
105 | return s->p - s->b; | |
106 | } | |
107 | ||
108 | static void | |
109 | string_setlength (string *s, int n) | |
110 | { | |
111 | if (n - string_length (s) < 0) | |
112 | { | |
113 | s->p = s->b + n; | |
114 | } | |
115 | } | |
116 | ||
117 | static void | |
118 | string_append (string *p, const char *s) | |
119 | { | |
120 | int n = strlen (s); | |
121 | string_need (p, n); | |
122 | memcpy (p->p, s, n); | |
123 | p->p += n; | |
124 | } | |
125 | ||
126 | static void | |
127 | string_appendn (string *p, const char *s, int n) | |
128 | { | |
129 | if (n != 0) | |
130 | { | |
131 | string_need (p, n); | |
132 | memcpy (p->p, s, n); | |
133 | p->p += n; | |
134 | } | |
135 | } | |
136 | ||
137 | static void | |
138 | string_prependn (string *p, const char *s, int n) | |
139 | { | |
140 | char *q; | |
141 | ||
142 | if (n != 0) | |
143 | { | |
144 | string_need (p, n); | |
145 | for (q = p->p - 1; q >= p->b; q--) | |
146 | { | |
147 | q[n] = q[0]; | |
148 | } | |
149 | memcpy (p->b, s, n); | |
150 | p->p += n; | |
151 | } | |
152 | } | |
153 | ||
154 | static void | |
155 | string_prepend (string *p, const char *s) | |
156 | { | |
157 | if (s != NULL && *s != '\0') | |
158 | { | |
159 | string_prependn (p, s, strlen (s)); | |
160 | } | |
161 | } | |
162 | ||
3f30a274 IB |
163 | /* Demangle information structure we pass around. */ |
164 | struct dlang_info | |
7e865541 | 165 | { |
3f30a274 IB |
166 | /* The string we are demangling. */ |
167 | const char *s; | |
168 | /* The index of the last back reference. */ | |
169 | int last_backref; | |
7e865541 IB |
170 | }; |
171 | ||
3f30a274 IB |
172 | /* Pass as the LEN to dlang_parse_template if symbol length is not known. */ |
173 | enum { TEMPLATE_LENGTH_UNKNOWN = -1 }; | |
174 | ||
43b1b9ed | 175 | /* Prototypes for forward referenced functions */ |
3f30a274 IB |
176 | static const char *dlang_function_type (string *, const char *, |
177 | struct dlang_info *); | |
43b1b9ed | 178 | |
3f30a274 IB |
179 | static const char *dlang_function_args (string *, const char *, |
180 | struct dlang_info *); | |
181 | ||
182 | static const char *dlang_type (string *, const char *, struct dlang_info *); | |
43b1b9ed IB |
183 | |
184 | static const char *dlang_value (string *, const char *, const char *, char); | |
185 | ||
5a4dbf7d | 186 | static const char *dlang_parse_qualified (string *, const char *, |
3f30a274 | 187 | struct dlang_info *, int); |
5a4dbf7d IB |
188 | |
189 | static const char *dlang_parse_mangle (string *, const char *, | |
3f30a274 IB |
190 | struct dlang_info *); |
191 | ||
192 | static const char *dlang_parse_tuple (string *, const char *, | |
193 | struct dlang_info *); | |
43b1b9ed | 194 | |
3f30a274 IB |
195 | static const char *dlang_parse_template (string *, const char *, |
196 | struct dlang_info *, long); | |
43b1b9ed | 197 | |
3f30a274 | 198 | static const char *dlang_lname (string *, const char *, long); |
43b1b9ed IB |
199 | |
200 | ||
dbe65f77 IB |
201 | /* Extract the number from MANGLED, and assign the result to RET. |
202 | Return the remaining string on success or NULL on failure. */ | |
203 | static const char * | |
204 | dlang_number (const char *mangled, long *ret) | |
205 | { | |
206 | /* Return NULL if trying to extract something that isn't a digit. */ | |
207 | if (mangled == NULL || !ISDIGIT (*mangled)) | |
208 | return NULL; | |
209 | ||
210 | (*ret) = 0; | |
211 | ||
212 | while (ISDIGIT (*mangled)) | |
213 | { | |
214 | (*ret) *= 10; | |
215 | ||
216 | /* If an overflow occured when multiplying by ten, the result | |
217 | will not be a multiple of ten. */ | |
218 | if ((*ret % 10) != 0) | |
219 | return NULL; | |
220 | ||
221 | (*ret) += mangled[0] - '0'; | |
222 | mangled++; | |
223 | } | |
224 | ||
225 | if (*mangled == '\0' || *ret < 0) | |
226 | return NULL; | |
227 | ||
228 | return mangled; | |
229 | } | |
230 | ||
5398cab9 IB |
231 | /* Extract the hex-digit from MANGLED, and assign the result to RET. |
232 | Return the remaining string on success or NULL on failure. */ | |
233 | static const char * | |
234 | dlang_hexdigit (const char *mangled, char *ret) | |
235 | { | |
236 | char c; | |
237 | ||
238 | /* Return NULL if trying to extract something that isn't a hexdigit. */ | |
239 | if (mangled == NULL || !ISXDIGIT (mangled[0]) || !ISXDIGIT (mangled[1])) | |
240 | return NULL; | |
241 | ||
242 | c = mangled[0]; | |
243 | if (!ISDIGIT (c)) | |
244 | (*ret) = (c - (ISUPPER (c) ? 'A' : 'a') + 10); | |
245 | else | |
246 | (*ret) = (c - '0'); | |
247 | ||
248 | c = mangled[1]; | |
249 | if (!ISDIGIT (c)) | |
250 | (*ret) = (*ret << 4) | (c - (ISUPPER (c) ? 'A' : 'a') + 10); | |
251 | else | |
252 | (*ret) = (*ret << 4) | (c - '0'); | |
253 | ||
254 | mangled += 2; | |
255 | ||
256 | return mangled; | |
257 | } | |
258 | ||
0e3712f6 IB |
259 | /* Extract the function calling convention from MANGLED and |
260 | return 1 on success or 0 on failure. */ | |
261 | static int | |
262 | dlang_call_convention_p (const char *mangled) | |
263 | { | |
264 | switch (*mangled) | |
265 | { | |
266 | case 'F': case 'U': case 'V': | |
267 | case 'W': case 'R': case 'Y': | |
268 | return 1; | |
269 | ||
270 | default: | |
271 | return 0; | |
272 | } | |
273 | } | |
274 | ||
3f30a274 IB |
275 | /* Extract the back reference position from MANGLED, and assign the result |
276 | to RET. Return the remaining string on success or NULL on failure. */ | |
277 | static const char * | |
278 | dlang_decode_backref (const char *mangled, long *ret) | |
279 | { | |
280 | /* Return NULL if trying to extract something that isn't a digit. */ | |
281 | if (mangled == NULL || !ISALPHA (*mangled)) | |
282 | return NULL; | |
283 | ||
284 | /* Any identifier or non-basic type that has been emitted to the mangled | |
285 | symbol before will not be emitted again, but is referenced by a special | |
286 | sequence encoding the relative position of the original occurrence in the | |
287 | mangled symbol name. | |
288 | ||
289 | Numbers in back references are encoded with base 26 by upper case letters | |
290 | A-Z for higher digits but lower case letters a-z for the last digit. | |
291 | ||
292 | NumberBackRef: | |
293 | [a-z] | |
294 | [A-Z] NumberBackRef | |
295 | ^ | |
296 | */ | |
297 | (*ret) = 0; | |
298 | ||
299 | while (ISALPHA (*mangled)) | |
300 | { | |
301 | (*ret) *= 26; | |
302 | ||
303 | /* If an overflow occured when multiplying by 26, the result | |
304 | will not be a multiple of 26. */ | |
305 | if ((*ret % 26) != 0) | |
306 | return NULL; | |
307 | ||
308 | if (mangled[0] >= 'a' && mangled[0] <= 'z') | |
309 | { | |
310 | (*ret) += mangled[0] - 'a'; | |
311 | return mangled + 1; | |
312 | } | |
313 | ||
314 | (*ret) += mangled[0] - 'A'; | |
315 | mangled++; | |
316 | } | |
317 | ||
318 | return NULL; | |
319 | } | |
320 | ||
321 | /* Extract the symbol pointed at by the back reference and assign the result | |
322 | to RET. Return the remaining string on success or NULL on failure. */ | |
323 | static const char * | |
324 | dlang_backref (const char *mangled, const char **ret, struct dlang_info *info) | |
325 | { | |
326 | (*ret) = NULL; | |
327 | ||
328 | if (mangled == NULL || *mangled != 'Q') | |
329 | return NULL; | |
330 | ||
331 | /* Position of 'Q'. */ | |
332 | const char *qpos = mangled; | |
333 | long refpos; | |
334 | mangled++; | |
335 | ||
336 | mangled = dlang_decode_backref (mangled, &refpos); | |
337 | if (mangled == NULL) | |
338 | return NULL; | |
339 | ||
340 | if (refpos <= 0 || refpos > qpos - info->s) | |
341 | return NULL; | |
342 | ||
343 | /* Set the position of the back reference. */ | |
344 | (*ret) = qpos - refpos; | |
345 | ||
346 | return mangled; | |
347 | } | |
348 | ||
349 | /* Demangle a back referenced symbol from MANGLED and append it to DECL. | |
350 | Return the remaining string on success or NULL on failure. */ | |
351 | static const char * | |
352 | dlang_symbol_backref (string *decl, const char *mangled, | |
353 | struct dlang_info *info) | |
354 | { | |
355 | /* An identifier back reference always points to a digit 0 to 9. | |
356 | ||
357 | IdentifierBackRef: | |
358 | Q NumberBackRef | |
359 | ^ | |
360 | */ | |
361 | const char *backref; | |
362 | long len; | |
363 | ||
364 | /* Get position of the back reference. */ | |
365 | mangled = dlang_backref (mangled, &backref, info); | |
366 | ||
367 | /* Must point to a simple identifier. */ | |
368 | backref = dlang_number (backref, &len); | |
369 | if (backref == NULL) | |
370 | return NULL; | |
371 | ||
372 | backref = dlang_lname (decl, backref, len); | |
373 | if (backref == NULL) | |
374 | return NULL; | |
375 | ||
376 | return mangled; | |
377 | } | |
378 | ||
379 | /* Demangle a back referenced type from MANGLED and append it to DECL. | |
380 | IS_FUNCTION is 1 if the back referenced type is expected to be a function. | |
381 | Return the remaining string on success or NULL on failure. */ | |
382 | static const char * | |
383 | dlang_type_backref (string *decl, const char *mangled, struct dlang_info *info, | |
384 | int is_function) | |
385 | { | |
386 | /* A type back reference always points to a letter. | |
387 | ||
388 | TypeBackRef: | |
389 | Q NumberBackRef | |
390 | ^ | |
391 | */ | |
392 | const char *backref; | |
393 | ||
394 | /* If we appear to be moving backwards through the mangle string, then | |
395 | bail as this may be a recursive back reference. */ | |
396 | if (mangled - info->s >= info->last_backref) | |
397 | return NULL; | |
398 | ||
399 | int save_refpos = info->last_backref; | |
400 | info->last_backref = mangled - info->s; | |
401 | ||
402 | /* Get position of the back reference. */ | |
403 | mangled = dlang_backref (mangled, &backref, info); | |
404 | ||
405 | /* Must point to a type. */ | |
406 | if (is_function) | |
407 | backref = dlang_function_type (decl, backref, info); | |
408 | else | |
409 | backref = dlang_type (decl, backref, info); | |
410 | ||
411 | info->last_backref = save_refpos; | |
412 | ||
413 | if (backref == NULL) | |
414 | return NULL; | |
415 | ||
416 | return mangled; | |
417 | } | |
418 | ||
419 | /* Extract the beginning of a symbol name from MANGLED and | |
420 | return 1 on success or 0 on failure. */ | |
421 | static int | |
422 | dlang_symbol_name_p (const char *mangled, struct dlang_info *info) | |
423 | { | |
424 | long ret; | |
425 | const char *qref = mangled; | |
426 | ||
427 | if (ISDIGIT (*mangled)) | |
428 | return 1; | |
429 | ||
430 | if (mangled[0] == '_' && mangled[1] == '_' | |
431 | && (mangled[2] == 'T' || mangled[2] == 'U')) | |
432 | return 1; | |
433 | ||
434 | if (*mangled != 'Q') | |
435 | return 0; | |
436 | ||
437 | mangled = dlang_decode_backref (mangled + 1, &ret); | |
438 | if (mangled == NULL || ret <= 0 || ret > qref - info->s) | |
439 | return 0; | |
440 | ||
441 | return ISDIGIT (qref[-ret]); | |
442 | } | |
443 | ||
43b1b9ed IB |
444 | /* Demangle the calling convention from MANGLED and append it to DECL. |
445 | Return the remaining string on success or NULL on failure. */ | |
446 | static const char * | |
447 | dlang_call_convention (string *decl, const char *mangled) | |
448 | { | |
449 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 450 | return NULL; |
43b1b9ed IB |
451 | |
452 | switch (*mangled) | |
453 | { | |
454 | case 'F': /* (D) */ | |
455 | mangled++; | |
456 | break; | |
457 | case 'U': /* (C) */ | |
458 | mangled++; | |
459 | string_append (decl, "extern(C) "); | |
460 | break; | |
461 | case 'W': /* (Windows) */ | |
462 | mangled++; | |
463 | string_append (decl, "extern(Windows) "); | |
464 | break; | |
465 | case 'V': /* (Pascal) */ | |
466 | mangled++; | |
467 | string_append (decl, "extern(Pascal) "); | |
468 | break; | |
469 | case 'R': /* (C++) */ | |
470 | mangled++; | |
471 | string_append (decl, "extern(C++) "); | |
472 | break; | |
13617162 IB |
473 | case 'Y': /* (Objective-C) */ |
474 | mangled++; | |
475 | string_append (decl, "extern(Objective-C) "); | |
476 | break; | |
43b1b9ed IB |
477 | default: |
478 | return NULL; | |
479 | } | |
480 | ||
481 | return mangled; | |
482 | } | |
483 | ||
fa66ced4 IB |
484 | /* Extract the type modifiers from MANGLED and append them to DECL. |
485 | Returns the remaining signature on success or NULL on failure. */ | |
486 | static const char * | |
487 | dlang_type_modifiers (string *decl, const char *mangled) | |
488 | { | |
489 | if (mangled == NULL || *mangled == '\0') | |
490 | return NULL; | |
491 | ||
492 | switch (*mangled) | |
493 | { | |
494 | case 'x': /* const */ | |
495 | mangled++; | |
496 | string_append (decl, " const"); | |
497 | return mangled; | |
498 | case 'y': /* immutable */ | |
499 | mangled++; | |
500 | string_append (decl, " immutable"); | |
501 | return mangled; | |
502 | case 'O': /* shared */ | |
503 | mangled++; | |
504 | string_append (decl, " shared"); | |
505 | return dlang_type_modifiers (decl, mangled); | |
506 | case 'N': | |
507 | mangled++; | |
508 | if (*mangled == 'g') /* wild */ | |
509 | { | |
510 | mangled++; | |
511 | string_append (decl, " inout"); | |
512 | return dlang_type_modifiers (decl, mangled); | |
513 | } | |
514 | else | |
515 | return NULL; | |
516 | ||
517 | default: | |
518 | return mangled; | |
519 | } | |
520 | } | |
521 | ||
43b1b9ed IB |
522 | /* Demangle the D function attributes from MANGLED and append it to DECL. |
523 | Return the remaining string on success or NULL on failure. */ | |
524 | static const char * | |
525 | dlang_attributes (string *decl, const char *mangled) | |
526 | { | |
527 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 528 | return NULL; |
43b1b9ed IB |
529 | |
530 | while (*mangled == 'N') | |
531 | { | |
532 | mangled++; | |
533 | switch (*mangled) | |
534 | { | |
535 | case 'a': /* pure */ | |
536 | mangled++; | |
537 | string_append (decl, "pure "); | |
538 | continue; | |
539 | case 'b': /* nothrow */ | |
540 | mangled++; | |
541 | string_append (decl, "nothrow "); | |
542 | continue; | |
543 | case 'c': /* ref */ | |
544 | mangled++; | |
545 | string_append (decl, "ref "); | |
546 | continue; | |
547 | case 'd': /* @property */ | |
548 | mangled++; | |
549 | string_append (decl, "@property "); | |
550 | continue; | |
551 | case 'e': /* @trusted */ | |
552 | mangled++; | |
553 | string_append (decl, "@trusted "); | |
554 | continue; | |
555 | case 'f': /* @safe */ | |
556 | mangled++; | |
557 | string_append (decl, "@safe "); | |
558 | continue; | |
559 | case 'g': | |
560 | case 'h': | |
7ce4461f | 561 | case 'k': |
43b1b9ed IB |
562 | /* inout parameter is represented as 'Ng'. |
563 | vector parameter is represented as 'Nh'. | |
7ce4461f | 564 | return paramenter is represented as 'Nk'. |
43b1b9ed IB |
565 | If we see this, then we know we're really in the |
566 | parameter list. Rewind and break. */ | |
567 | mangled--; | |
568 | break; | |
569 | case 'i': /* @nogc */ | |
570 | mangled++; | |
571 | string_append (decl, "@nogc "); | |
572 | continue; | |
7ce4461f IB |
573 | case 'j': /* return */ |
574 | mangled++; | |
575 | string_append (decl, "return "); | |
576 | continue; | |
ec89d258 IB |
577 | case 'l': /* scope */ |
578 | mangled++; | |
579 | string_append (decl, "scope "); | |
580 | continue; | |
7ce4461f IB |
581 | |
582 | default: /* unknown attribute */ | |
583 | return NULL; | |
43b1b9ed IB |
584 | } |
585 | break; | |
586 | } | |
587 | ||
588 | return mangled; | |
589 | } | |
590 | ||
3f30a274 IB |
591 | /* Demangle the function type from MANGLED without the return type. |
592 | The arguments are appended to ARGS, the calling convention is appended | |
593 | to CALL and attributes are appended to ATTR. Any of these can be NULL | |
594 | to throw the information away. Return the remaining string on success | |
595 | or NULL on failure. */ | |
596 | static const char * | |
597 | dlang_function_type_noreturn (string *args, string *call, string *attr, | |
598 | const char *mangled, struct dlang_info *info) | |
599 | { | |
600 | string dump; | |
601 | string_init (&dump); | |
602 | ||
603 | /* Skip over calling convention and attributes. */ | |
604 | mangled = dlang_call_convention (call ? call : &dump, mangled); | |
605 | mangled = dlang_attributes (attr ? attr : &dump, mangled); | |
606 | ||
607 | if (args) | |
608 | string_append (args, "("); | |
609 | ||
610 | mangled = dlang_function_args (args ? args : &dump, mangled, info); | |
611 | if (args) | |
612 | string_append (args, ")"); | |
613 | ||
614 | string_delete (&dump); | |
615 | return mangled; | |
616 | } | |
617 | ||
43b1b9ed IB |
618 | /* Demangle the function type from MANGLED and append it to DECL. |
619 | Return the remaining string on success or NULL on failure. */ | |
620 | static const char * | |
3f30a274 | 621 | dlang_function_type (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed IB |
622 | { |
623 | string attr, args, type; | |
43b1b9ed IB |
624 | |
625 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 626 | return NULL; |
43b1b9ed IB |
627 | |
628 | /* The order of the mangled string is: | |
629 | CallConvention FuncAttrs Arguments ArgClose Type | |
630 | ||
631 | The demangled string is re-ordered as: | |
632 | CallConvention Type Arguments FuncAttrs | |
633 | */ | |
634 | string_init (&attr); | |
635 | string_init (&args); | |
636 | string_init (&type); | |
637 | ||
3f30a274 | 638 | mangled = dlang_function_type_noreturn (&args, decl, &attr, mangled, info); |
43b1b9ed IB |
639 | |
640 | /* Function return type. */ | |
3f30a274 | 641 | mangled = dlang_type (&type, mangled, info); |
43b1b9ed IB |
642 | |
643 | /* Append to decl in order. */ | |
3f30a274 IB |
644 | string_appendn (decl, type.b, string_length (&type)); |
645 | string_appendn (decl, args.b, string_length (&args)); | |
646 | string_append (decl, " "); | |
647 | string_appendn (decl, attr.b, string_length (&attr)); | |
43b1b9ed IB |
648 | |
649 | string_delete (&attr); | |
650 | string_delete (&args); | |
651 | string_delete (&type); | |
652 | return mangled; | |
653 | } | |
654 | ||
655 | /* Demangle the argument list from MANGLED and append it to DECL. | |
656 | Return the remaining string on success or NULL on failure. */ | |
657 | static const char * | |
3f30a274 | 658 | dlang_function_args (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed IB |
659 | { |
660 | size_t n = 0; | |
661 | ||
662 | while (mangled && *mangled != '\0') | |
663 | { | |
664 | switch (*mangled) | |
665 | { | |
666 | case 'X': /* (variadic T t...) style. */ | |
667 | mangled++; | |
668 | string_append (decl, "..."); | |
669 | return mangled; | |
670 | case 'Y': /* (variadic T t, ...) style. */ | |
671 | mangled++; | |
acf1f7da IB |
672 | if (n != 0) |
673 | string_append (decl, ", "); | |
674 | string_append (decl, "..."); | |
43b1b9ed IB |
675 | return mangled; |
676 | case 'Z': /* Normal function. */ | |
677 | mangled++; | |
678 | return mangled; | |
679 | } | |
680 | ||
681 | if (n++) | |
682 | string_append (decl, ", "); | |
683 | ||
684 | if (*mangled == 'M') /* scope(T) */ | |
685 | { | |
686 | mangled++; | |
687 | string_append (decl, "scope "); | |
688 | } | |
689 | ||
7ce4461f IB |
690 | if (mangled[0] == 'N' && mangled[1] == 'k') /* return(T) */ |
691 | { | |
692 | mangled += 2; | |
693 | string_append (decl, "return "); | |
694 | } | |
695 | ||
43b1b9ed IB |
696 | switch (*mangled) |
697 | { | |
698 | case 'J': /* out(T) */ | |
699 | mangled++; | |
700 | string_append (decl, "out "); | |
701 | break; | |
702 | case 'K': /* ref(T) */ | |
703 | mangled++; | |
704 | string_append (decl, "ref "); | |
705 | break; | |
706 | case 'L': /* lazy(T) */ | |
707 | mangled++; | |
708 | string_append (decl, "lazy "); | |
709 | break; | |
710 | } | |
3f30a274 | 711 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
712 | } |
713 | ||
714 | return mangled; | |
715 | } | |
716 | ||
717 | /* Demangle the type from MANGLED and append it to DECL. | |
718 | Return the remaining string on success or NULL on failure. */ | |
719 | static const char * | |
3f30a274 | 720 | dlang_type (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed IB |
721 | { |
722 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 723 | return NULL; |
43b1b9ed IB |
724 | |
725 | switch (*mangled) | |
726 | { | |
727 | case 'O': /* shared(T) */ | |
728 | mangled++; | |
729 | string_append (decl, "shared("); | |
3f30a274 | 730 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
731 | string_append (decl, ")"); |
732 | return mangled; | |
733 | case 'x': /* const(T) */ | |
734 | mangled++; | |
735 | string_append (decl, "const("); | |
3f30a274 | 736 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
737 | string_append (decl, ")"); |
738 | return mangled; | |
739 | case 'y': /* immutable(T) */ | |
740 | mangled++; | |
741 | string_append (decl, "immutable("); | |
3f30a274 | 742 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
743 | string_append (decl, ")"); |
744 | return mangled; | |
745 | case 'N': | |
746 | mangled++; | |
747 | if (*mangled == 'g') /* wild(T) */ | |
748 | { | |
749 | mangled++; | |
750 | string_append (decl, "inout("); | |
3f30a274 | 751 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
752 | string_append (decl, ")"); |
753 | return mangled; | |
754 | } | |
755 | else if (*mangled == 'h') /* vector(T) */ | |
756 | { | |
757 | mangled++; | |
758 | string_append (decl, "__vector("); | |
3f30a274 | 759 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
760 | string_append (decl, ")"); |
761 | return mangled; | |
762 | } | |
763 | else | |
764 | return NULL; | |
765 | case 'A': /* dynamic array (T[]) */ | |
766 | mangled++; | |
3f30a274 | 767 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
768 | string_append (decl, "[]"); |
769 | return mangled; | |
770 | case 'G': /* static array (T[N]) */ | |
771 | { | |
772 | const char *numptr; | |
773 | size_t num = 0; | |
774 | mangled++; | |
775 | ||
776 | numptr = mangled; | |
777 | while (ISDIGIT (*mangled)) | |
778 | { | |
779 | num++; | |
780 | mangled++; | |
781 | } | |
3f30a274 | 782 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
783 | string_append (decl, "["); |
784 | string_appendn (decl, numptr, num); | |
785 | string_append (decl, "]"); | |
786 | return mangled; | |
787 | } | |
788 | case 'H': /* associative array (T[T]) */ | |
789 | { | |
790 | string type; | |
791 | size_t sztype; | |
792 | mangled++; | |
793 | ||
794 | string_init (&type); | |
3f30a274 | 795 | mangled = dlang_type (&type, mangled, info); |
43b1b9ed IB |
796 | sztype = string_length (&type); |
797 | ||
3f30a274 | 798 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
799 | string_append (decl, "["); |
800 | string_appendn (decl, type.b, sztype); | |
801 | string_append (decl, "]"); | |
802 | ||
803 | string_delete (&type); | |
804 | return mangled; | |
805 | } | |
806 | case 'P': /* pointer (T*) */ | |
807 | mangled++; | |
0e3712f6 | 808 | if (!dlang_call_convention_p (mangled)) |
0f4b8b31 | 809 | { |
3f30a274 | 810 | mangled = dlang_type (decl, mangled, info); |
0e3712f6 | 811 | string_append (decl, "*"); |
0f4b8b31 IB |
812 | return mangled; |
813 | } | |
0e3712f6 IB |
814 | /* Fall through */ |
815 | case 'F': /* function T (D) */ | |
816 | case 'U': /* function T (C) */ | |
817 | case 'W': /* function T (Windows) */ | |
818 | case 'V': /* function T (Pascal) */ | |
819 | case 'R': /* function T (C++) */ | |
820 | case 'Y': /* function T (Objective-C) */ | |
821 | /* Function pointer types don't include the trailing asterisk. */ | |
3f30a274 | 822 | mangled = dlang_function_type (decl, mangled, info); |
0e3712f6 | 823 | string_append (decl, "function"); |
43b1b9ed IB |
824 | return mangled; |
825 | case 'I': /* ident T */ | |
826 | case 'C': /* class T */ | |
827 | case 'S': /* struct T */ | |
828 | case 'E': /* enum T */ | |
829 | case 'T': /* typedef T */ | |
830 | mangled++; | |
3f30a274 | 831 | return dlang_parse_qualified (decl, mangled, info, 0); |
43b1b9ed | 832 | case 'D': /* delegate T */ |
fa66ced4 IB |
833 | { |
834 | string mods; | |
835 | size_t szmods; | |
43b1b9ed | 836 | mangled++; |
fa66ced4 IB |
837 | |
838 | string_init (&mods); | |
839 | mangled = dlang_type_modifiers (&mods, mangled); | |
840 | szmods = string_length (&mods); | |
841 | ||
3f30a274 IB |
842 | /* Back referenced function type. */ |
843 | if (*mangled == 'Q') | |
844 | mangled = dlang_type_backref (decl, mangled, info, 1); | |
845 | else | |
846 | mangled = dlang_function_type (decl, mangled, info); | |
847 | ||
43b1b9ed | 848 | string_append (decl, "delegate"); |
fa66ced4 IB |
849 | string_appendn (decl, mods.b, szmods); |
850 | ||
851 | string_delete (&mods); | |
43b1b9ed | 852 | return mangled; |
fa66ced4 | 853 | } |
43b1b9ed IB |
854 | case 'B': /* tuple T */ |
855 | mangled++; | |
3f30a274 | 856 | return dlang_parse_tuple (decl, mangled, info); |
43b1b9ed | 857 | |
43b1b9ed IB |
858 | /* Basic types */ |
859 | case 'n': | |
860 | mangled++; | |
861 | string_append (decl, "none"); | |
862 | return mangled; | |
863 | case 'v': | |
864 | mangled++; | |
865 | string_append (decl, "void"); | |
866 | return mangled; | |
867 | case 'g': | |
868 | mangled++; | |
869 | string_append (decl, "byte"); | |
870 | return mangled; | |
871 | case 'h': | |
872 | mangled++; | |
873 | string_append (decl, "ubyte"); | |
874 | return mangled; | |
875 | case 's': | |
876 | mangled++; | |
877 | string_append (decl, "short"); | |
878 | return mangled; | |
879 | case 't': | |
880 | mangled++; | |
881 | string_append (decl, "ushort"); | |
882 | return mangled; | |
883 | case 'i': | |
884 | mangled++; | |
885 | string_append (decl, "int"); | |
886 | return mangled; | |
887 | case 'k': | |
888 | mangled++; | |
889 | string_append (decl, "uint"); | |
890 | return mangled; | |
891 | case 'l': | |
892 | mangled++; | |
893 | string_append (decl, "long"); | |
894 | return mangled; | |
895 | case 'm': | |
896 | mangled++; | |
897 | string_append (decl, "ulong"); | |
898 | return mangled; | |
899 | case 'f': | |
900 | mangled++; | |
901 | string_append (decl, "float"); | |
902 | return mangled; | |
903 | case 'd': | |
904 | mangled++; | |
905 | string_append (decl, "double"); | |
906 | return mangled; | |
907 | case 'e': | |
908 | mangled++; | |
909 | string_append (decl, "real"); | |
910 | return mangled; | |
911 | ||
912 | /* Imaginary and Complex types */ | |
913 | case 'o': | |
914 | mangled++; | |
915 | string_append (decl, "ifloat"); | |
916 | return mangled; | |
917 | case 'p': | |
918 | mangled++; | |
919 | string_append (decl, "idouble"); | |
920 | return mangled; | |
921 | case 'j': | |
922 | mangled++; | |
923 | string_append (decl, "ireal"); | |
924 | return mangled; | |
925 | case 'q': | |
926 | mangled++; | |
927 | string_append (decl, "cfloat"); | |
928 | return mangled; | |
929 | case 'r': | |
930 | mangled++; | |
931 | string_append (decl, "cdouble"); | |
932 | return mangled; | |
933 | case 'c': | |
934 | mangled++; | |
935 | string_append (decl, "creal"); | |
936 | return mangled; | |
937 | ||
938 | /* Other types */ | |
939 | case 'b': | |
940 | mangled++; | |
941 | string_append (decl, "bool"); | |
942 | return mangled; | |
943 | case 'a': | |
944 | mangled++; | |
945 | string_append (decl, "char"); | |
946 | return mangled; | |
947 | case 'u': | |
948 | mangled++; | |
949 | string_append (decl, "wchar"); | |
950 | return mangled; | |
951 | case 'w': | |
952 | mangled++; | |
953 | string_append (decl, "dchar"); | |
954 | return mangled; | |
59251a73 IB |
955 | case 'z': |
956 | mangled++; | |
957 | switch (*mangled) | |
958 | { | |
959 | case 'i': | |
960 | mangled++; | |
961 | string_append (decl, "cent"); | |
962 | return mangled; | |
963 | case 'k': | |
964 | mangled++; | |
965 | string_append (decl, "ucent"); | |
966 | return mangled; | |
967 | } | |
968 | return NULL; | |
43b1b9ed | 969 | |
3f30a274 IB |
970 | /* Back referenced type. */ |
971 | case 'Q': | |
972 | return dlang_type_backref (decl, mangled, info, 0); | |
973 | ||
43b1b9ed IB |
974 | default: /* unhandled */ |
975 | return NULL; | |
976 | } | |
977 | } | |
978 | ||
979 | /* Extract the identifier from MANGLED and append it to DECL. | |
980 | Return the remaining string on success or NULL on failure. */ | |
981 | static const char * | |
3f30a274 | 982 | dlang_identifier (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed | 983 | { |
7e865541 IB |
984 | long len; |
985 | ||
3f30a274 | 986 | if (mangled == NULL || *mangled == '\0') |
7e865541 IB |
987 | return NULL; |
988 | ||
3f30a274 IB |
989 | if (*mangled == 'Q') |
990 | return dlang_symbol_backref (decl, mangled, info); | |
43b1b9ed | 991 | |
3f30a274 IB |
992 | /* May be a template instance without a length prefix. */ |
993 | if (mangled[0] == '_' && mangled[1] == '_' | |
994 | && (mangled[2] == 'T' || mangled[2] == 'U')) | |
995 | return dlang_parse_template (decl, mangled, info, TEMPLATE_LENGTH_UNKNOWN); | |
7e865541 | 996 | |
3f30a274 | 997 | const char *endptr = dlang_number (mangled, &len); |
7e865541 | 998 | |
3f30a274 IB |
999 | if (endptr == NULL || len == 0) |
1000 | return NULL; | |
7e865541 | 1001 | |
3f30a274 IB |
1002 | if (strlen (endptr) < (size_t) len) |
1003 | return NULL; | |
7e865541 | 1004 | |
3f30a274 | 1005 | mangled = endptr; |
43b1b9ed | 1006 | |
3f30a274 IB |
1007 | /* May be a template instance with a length prefix. */ |
1008 | if (len >= 5 && mangled[0] == '_' && mangled[1] == '_' | |
1009 | && (mangled[2] == 'T' || mangled[2] == 'U')) | |
1010 | return dlang_parse_template (decl, mangled, info, len); | |
43b1b9ed | 1011 | |
3f30a274 IB |
1012 | return dlang_lname (decl, mangled, len); |
1013 | } | |
43b1b9ed | 1014 | |
3f30a274 IB |
1015 | /* Extract the plain identifier from MANGLED and prepend/append it to DECL |
1016 | with special treatment for some magic compiler generted symbols. | |
1017 | Return the remaining string on success or NULL on failure. */ | |
1018 | static const char * | |
1019 | dlang_lname (string *decl, const char *mangled, long len) | |
1020 | { | |
1021 | switch (len) | |
1022 | { | |
1023 | case 6: | |
1024 | if (strncmp (mangled, "__ctor", len) == 0) | |
43b1b9ed | 1025 | { |
3f30a274 IB |
1026 | /* Constructor symbol for a class/struct. */ |
1027 | string_append (decl, "this"); | |
1028 | mangled += len; | |
1029 | return mangled; | |
1030 | } | |
1031 | else if (strncmp (mangled, "__dtor", len) == 0) | |
1032 | { | |
1033 | /* Destructor symbol for a class/struct. */ | |
1034 | string_append (decl, "~this"); | |
1035 | mangled += len; | |
1036 | return mangled; | |
1037 | } | |
1038 | else if (strncmp (mangled, "__initZ", len + 1) == 0) | |
1039 | { | |
1040 | /* The static initialiser for a given symbol. */ | |
1041 | string_prepend (decl, "initializer for "); | |
1042 | string_setlength (decl, string_length (decl) - 1); | |
1043 | mangled += len; | |
1044 | return mangled; | |
1045 | } | |
1046 | else if (strncmp (mangled, "__vtblZ", len + 1) == 0) | |
1047 | { | |
1048 | /* The vtable symbol for a given class. */ | |
1049 | string_prepend (decl, "vtable for "); | |
1050 | string_setlength (decl, string_length (decl) - 1); | |
1051 | mangled += len; | |
1052 | return mangled; | |
1053 | } | |
1054 | break; | |
5cc158e9 | 1055 | |
3f30a274 IB |
1056 | case 7: |
1057 | if (strncmp (mangled, "__ClassZ", len + 1) == 0) | |
1058 | { | |
1059 | /* The classinfo symbol for a given class. */ | |
1060 | string_prepend (decl, "ClassInfo for "); | |
1061 | string_setlength (decl, string_length (decl) - 1); | |
1062 | mangled += len; | |
1063 | return mangled; | |
1064 | } | |
1065 | break; | |
5cc158e9 | 1066 | |
3f30a274 IB |
1067 | case 10: |
1068 | if (strncmp (mangled, "__postblitMFZ", len + 3) == 0) | |
1069 | { | |
1070 | /* Postblit symbol for a struct. */ | |
1071 | string_append (decl, "this(this)"); | |
1072 | mangled += len + 3; | |
1073 | return mangled; | |
1074 | } | |
1075 | break; | |
5cc158e9 | 1076 | |
3f30a274 IB |
1077 | case 11: |
1078 | if (strncmp (mangled, "__InterfaceZ", len + 1) == 0) | |
1079 | { | |
1080 | /* The interface symbol for a given class. */ | |
1081 | string_prepend (decl, "Interface for "); | |
1082 | string_setlength (decl, string_length (decl) - 1); | |
1083 | mangled += len; | |
1084 | return mangled; | |
43b1b9ed | 1085 | } |
3f30a274 | 1086 | break; |
43b1b9ed | 1087 | |
3f30a274 IB |
1088 | case 12: |
1089 | if (strncmp (mangled, "__ModuleInfoZ", len + 1) == 0) | |
1090 | { | |
1091 | /* The ModuleInfo symbol for a given module. */ | |
1092 | string_prepend (decl, "ModuleInfo for "); | |
1093 | string_setlength (decl, string_length (decl) - 1); | |
1094 | mangled += len; | |
1095 | return mangled; | |
1096 | } | |
1097 | break; | |
43b1b9ed | 1098 | } |
43b1b9ed | 1099 | |
3f30a274 IB |
1100 | string_appendn (decl, mangled, len); |
1101 | mangled += len; | |
1102 | ||
43b1b9ed IB |
1103 | return mangled; |
1104 | } | |
1105 | ||
1106 | /* Extract the integer value from MANGLED and append it to DECL, | |
1107 | where TYPE is the type it should be represented as. | |
1108 | Return the remaining string on success or NULL on failure. */ | |
1109 | static const char * | |
1110 | dlang_parse_integer (string *decl, const char *mangled, char type) | |
1111 | { | |
1112 | if (type == 'a' || type == 'u' || type == 'w') | |
1113 | { | |
1114 | /* Parse character value. */ | |
81adfd10 B |
1115 | char value[20]; |
1116 | int pos = sizeof(value); | |
43b1b9ed | 1117 | int width = 0; |
dbe65f77 | 1118 | long val; |
43b1b9ed | 1119 | |
dbe65f77 IB |
1120 | mangled = dlang_number (mangled, &val); |
1121 | if (mangled == NULL) | |
43b1b9ed IB |
1122 | return NULL; |
1123 | ||
1124 | string_append (decl, "'"); | |
1125 | ||
1126 | if (type == 'a' && val >= 0x20 && val < 0x7F) | |
1127 | { | |
1128 | /* Represent as a character literal. */ | |
1129 | char c = (char) val; | |
1130 | string_appendn (decl, &c, 1); | |
1131 | } | |
1132 | else | |
1133 | { | |
1134 | /* Represent as a hexadecimal value. */ | |
1135 | switch (type) | |
1136 | { | |
1137 | case 'a': /* char */ | |
1138 | string_append (decl, "\\x"); | |
1139 | width = 2; | |
1140 | break; | |
1141 | case 'u': /* wchar */ | |
1142 | string_append (decl, "\\u"); | |
1143 | width = 4; | |
1144 | break; | |
1145 | case 'w': /* dchar */ | |
1146 | string_append (decl, "\\U"); | |
1147 | width = 8; | |
1148 | break; | |
1149 | } | |
1150 | ||
1151 | while (val > 0) | |
1152 | { | |
1153 | int digit = val % 16; | |
1154 | ||
1155 | if (digit < 10) | |
1156 | value[--pos] = (char)(digit + '0'); | |
1157 | else | |
1158 | value[--pos] = (char)((digit - 10) + 'a'); | |
1159 | ||
1160 | val /= 16; | |
1161 | width--; | |
1162 | } | |
1163 | ||
1164 | for (; width > 0; width--) | |
1165 | value[--pos] = '0'; | |
1166 | ||
81adfd10 | 1167 | string_appendn (decl, &(value[pos]), sizeof(value) - pos); |
43b1b9ed IB |
1168 | } |
1169 | string_append (decl, "'"); | |
43b1b9ed IB |
1170 | } |
1171 | else if (type == 'b') | |
1172 | { | |
1173 | /* Parse boolean value. */ | |
dbe65f77 | 1174 | long val; |
43b1b9ed | 1175 | |
dbe65f77 IB |
1176 | mangled = dlang_number (mangled, &val); |
1177 | if (mangled == NULL) | |
43b1b9ed IB |
1178 | return NULL; |
1179 | ||
1180 | string_append (decl, val ? "true" : "false"); | |
43b1b9ed IB |
1181 | } |
1182 | else | |
1183 | { | |
1184 | /* Parse integer value. */ | |
1185 | const char *numptr = mangled; | |
1186 | size_t num = 0; | |
1187 | ||
dbe65f77 IB |
1188 | if (! ISDIGIT (*mangled)) |
1189 | return NULL; | |
1190 | ||
43b1b9ed IB |
1191 | while (ISDIGIT (*mangled)) |
1192 | { | |
1193 | num++; | |
1194 | mangled++; | |
1195 | } | |
1196 | string_appendn (decl, numptr, num); | |
1197 | ||
1198 | /* Append suffix. */ | |
1199 | switch (type) | |
1200 | { | |
1201 | case 'h': /* ubyte */ | |
1202 | case 't': /* ushort */ | |
1203 | case 'k': /* uint */ | |
1204 | string_append (decl, "u"); | |
1205 | break; | |
1206 | case 'l': /* long */ | |
1207 | string_append (decl, "L"); | |
1208 | break; | |
1209 | case 'm': /* ulong */ | |
1210 | string_append (decl, "uL"); | |
1211 | break; | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | return mangled; | |
1216 | } | |
1217 | ||
1218 | /* Extract the floating-point 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_parse_real (string *decl, const char *mangled) | |
1222 | { | |
43b1b9ed IB |
1223 | /* Handle NAN and +-INF. */ |
1224 | if (strncmp (mangled, "NAN", 3) == 0) | |
1225 | { | |
1226 | string_append (decl, "NaN"); | |
1227 | mangled += 3; | |
1228 | return mangled; | |
1229 | } | |
1230 | else if (strncmp (mangled, "INF", 3) == 0) | |
1231 | { | |
1232 | string_append (decl, "Inf"); | |
1233 | mangled += 3; | |
1234 | return mangled; | |
1235 | } | |
1236 | else if (strncmp (mangled, "NINF", 4) == 0) | |
1237 | { | |
1238 | string_append (decl, "-Inf"); | |
1239 | mangled += 4; | |
1240 | return mangled; | |
1241 | } | |
1242 | ||
1243 | /* Hexadecimal prefix and leading bit. */ | |
1244 | if (*mangled == 'N') | |
1245 | { | |
1a122a71 | 1246 | string_append (decl, "-"); |
43b1b9ed IB |
1247 | mangled++; |
1248 | } | |
1249 | ||
1250 | if (!ISXDIGIT (*mangled)) | |
1251 | return NULL; | |
1252 | ||
1a122a71 IB |
1253 | string_append (decl, "0x"); |
1254 | string_appendn (decl, mangled, 1); | |
1255 | string_append (decl, "."); | |
43b1b9ed IB |
1256 | mangled++; |
1257 | ||
1258 | /* Significand. */ | |
1259 | while (ISXDIGIT (*mangled)) | |
1260 | { | |
1a122a71 | 1261 | string_appendn (decl, mangled, 1); |
43b1b9ed IB |
1262 | mangled++; |
1263 | } | |
1264 | ||
1265 | /* Exponent. */ | |
1266 | if (*mangled != 'P') | |
1267 | return NULL; | |
1268 | ||
1a122a71 | 1269 | string_append (decl, "p"); |
43b1b9ed IB |
1270 | mangled++; |
1271 | ||
1272 | if (*mangled == 'N') | |
1273 | { | |
1a122a71 | 1274 | string_append (decl, "-"); |
43b1b9ed IB |
1275 | mangled++; |
1276 | } | |
1277 | ||
1278 | while (ISDIGIT (*mangled)) | |
1279 | { | |
1a122a71 | 1280 | string_appendn (decl, mangled, 1); |
43b1b9ed IB |
1281 | mangled++; |
1282 | } | |
1283 | ||
43b1b9ed IB |
1284 | return mangled; |
1285 | } | |
1286 | ||
43b1b9ed IB |
1287 | /* Extract the string value from MANGLED and append it to DECL. |
1288 | Return the remaining string on success or NULL on failure. */ | |
1289 | static const char * | |
1290 | dlang_parse_string (string *decl, const char *mangled) | |
1291 | { | |
1292 | char type = *mangled; | |
43b1b9ed IB |
1293 | long len; |
1294 | ||
1295 | mangled++; | |
dbe65f77 IB |
1296 | mangled = dlang_number (mangled, &len); |
1297 | if (mangled == NULL || *mangled != '_') | |
43b1b9ed IB |
1298 | return NULL; |
1299 | ||
1300 | mangled++; | |
1301 | string_append (decl, "\""); | |
1302 | while (len--) | |
1303 | { | |
5398cab9 IB |
1304 | char val; |
1305 | const char *endptr = dlang_hexdigit (mangled, &val); | |
1306 | ||
1307 | if (endptr == NULL) | |
1308 | return NULL; | |
1309 | ||
1310 | /* Sanitize white and non-printable characters. */ | |
1311 | switch (val) | |
43b1b9ed | 1312 | { |
5398cab9 IB |
1313 | case ' ': |
1314 | string_append (decl, " "); | |
1315 | break; | |
1316 | case '\t': | |
1317 | string_append (decl, "\\t"); | |
1318 | break; | |
1319 | case '\n': | |
1320 | string_append (decl, "\\n"); | |
1321 | break; | |
1322 | case '\r': | |
1323 | string_append (decl, "\\r"); | |
1324 | break; | |
1325 | case '\f': | |
1326 | string_append (decl, "\\f"); | |
1327 | break; | |
1328 | case '\v': | |
1329 | string_append (decl, "\\v"); | |
1330 | break; | |
eb058b7d | 1331 | |
5398cab9 IB |
1332 | default: |
1333 | if (ISPRINT (val)) | |
1334 | string_appendn (decl, &val, 1); | |
1335 | else | |
eb058b7d | 1336 | { |
5398cab9 IB |
1337 | string_append (decl, "\\x"); |
1338 | string_appendn (decl, mangled, 2); | |
eb058b7d | 1339 | } |
43b1b9ed | 1340 | } |
43b1b9ed | 1341 | |
5398cab9 | 1342 | mangled = endptr; |
43b1b9ed IB |
1343 | } |
1344 | string_append (decl, "\""); | |
1345 | ||
1346 | if (type != 'a') | |
1347 | string_appendn (decl, &type, 1); | |
1348 | ||
1349 | return mangled; | |
1350 | } | |
1351 | ||
1352 | /* Extract the static array value from MANGLED and append it to DECL. | |
1353 | Return the remaining string on success or NULL on failure. */ | |
1354 | static const char * | |
1355 | dlang_parse_arrayliteral (string *decl, const char *mangled) | |
1356 | { | |
dbe65f77 | 1357 | long elements; |
43b1b9ed | 1358 | |
dbe65f77 IB |
1359 | mangled = dlang_number (mangled, &elements); |
1360 | if (mangled == NULL) | |
43b1b9ed IB |
1361 | return NULL; |
1362 | ||
43b1b9ed IB |
1363 | string_append (decl, "["); |
1364 | while (elements--) | |
1365 | { | |
1366 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
80b1ab15 B |
1367 | if (mangled == NULL) |
1368 | return NULL; | |
1369 | ||
43b1b9ed IB |
1370 | if (elements != 0) |
1371 | string_append (decl, ", "); | |
1372 | } | |
1373 | ||
1374 | string_append (decl, "]"); | |
1375 | return mangled; | |
1376 | } | |
1377 | ||
1378 | /* Extract the associative array value from MANGLED and append it to DECL. | |
1379 | Return the remaining string on success or NULL on failure. */ | |
1380 | static const char * | |
1381 | dlang_parse_assocarray (string *decl, const char *mangled) | |
1382 | { | |
dbe65f77 | 1383 | long elements; |
43b1b9ed | 1384 | |
dbe65f77 IB |
1385 | mangled = dlang_number (mangled, &elements); |
1386 | if (mangled == NULL) | |
43b1b9ed IB |
1387 | return NULL; |
1388 | ||
43b1b9ed IB |
1389 | string_append (decl, "["); |
1390 | while (elements--) | |
1391 | { | |
1392 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
6c8dbbfe B |
1393 | if (mangled == NULL) |
1394 | return NULL; | |
1395 | ||
43b1b9ed IB |
1396 | string_append (decl, ":"); |
1397 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
6c8dbbfe B |
1398 | if (mangled == NULL) |
1399 | return NULL; | |
43b1b9ed IB |
1400 | |
1401 | if (elements != 0) | |
1402 | string_append (decl, ", "); | |
1403 | } | |
1404 | ||
1405 | string_append (decl, "]"); | |
1406 | return mangled; | |
1407 | } | |
1408 | ||
1409 | /* Extract the struct literal value for NAME from MANGLED and append it to DECL. | |
1410 | Return the remaining string on success or NULL on failure. */ | |
1411 | static const char * | |
1412 | dlang_parse_structlit (string *decl, const char *mangled, const char *name) | |
1413 | { | |
dbe65f77 | 1414 | long args; |
43b1b9ed | 1415 | |
dbe65f77 IB |
1416 | mangled = dlang_number (mangled, &args); |
1417 | if (mangled == NULL) | |
43b1b9ed IB |
1418 | return NULL; |
1419 | ||
43b1b9ed IB |
1420 | if (name != NULL) |
1421 | string_append (decl, name); | |
1422 | ||
1423 | string_append (decl, "("); | |
1424 | while (args--) | |
1425 | { | |
1426 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
dba20a51 B |
1427 | if (mangled == NULL) |
1428 | return NULL; | |
1429 | ||
43b1b9ed IB |
1430 | if (args != 0) |
1431 | string_append (decl, ", "); | |
1432 | } | |
1433 | ||
1434 | string_append (decl, ")"); | |
1435 | return mangled; | |
1436 | } | |
1437 | ||
1438 | /* Extract the value from MANGLED and append it to DECL. | |
1439 | Return the remaining string on success or NULL on failure. */ | |
1440 | static const char * | |
1441 | dlang_value (string *decl, const char *mangled, const char *name, char type) | |
1442 | { | |
1443 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 1444 | return NULL; |
43b1b9ed IB |
1445 | |
1446 | switch (*mangled) | |
1447 | { | |
1448 | /* Null value. */ | |
1449 | case 'n': | |
1450 | mangled++; | |
1451 | string_append (decl, "null"); | |
1452 | break; | |
1453 | ||
1454 | /* Integral values. */ | |
1455 | case 'N': | |
1456 | mangled++; | |
1457 | string_append (decl, "-"); | |
1458 | mangled = dlang_parse_integer (decl, mangled, type); | |
1459 | break; | |
1460 | ||
1461 | case 'i': | |
1462 | mangled++; | |
43b1b9ed | 1463 | /* Fall through */ |
dd03444b IB |
1464 | |
1465 | /* There really should always be an `i' before encoded numbers, but there | |
1466 | wasn't in early versions of D2, so this case range must remain for | |
1467 | backwards compatibility. */ | |
43b1b9ed IB |
1468 | case '0': case '1': case '2': case '3': case '4': |
1469 | case '5': case '6': case '7': case '8': case '9': | |
1470 | mangled = dlang_parse_integer (decl, mangled, type); | |
1471 | break; | |
1472 | ||
1473 | /* Real value. */ | |
1474 | case 'e': | |
1475 | mangled++; | |
1476 | mangled = dlang_parse_real (decl, mangled); | |
1477 | break; | |
1478 | ||
1479 | /* Complex value. */ | |
1480 | case 'c': | |
1481 | mangled++; | |
1482 | mangled = dlang_parse_real (decl, mangled); | |
1483 | string_append (decl, "+"); | |
1484 | if (mangled == NULL || *mangled != 'c') | |
1485 | return NULL; | |
1486 | mangled++; | |
1487 | mangled = dlang_parse_real (decl, mangled); | |
1488 | string_append (decl, "i"); | |
1489 | break; | |
1490 | ||
1491 | /* String values. */ | |
1492 | case 'a': /* UTF8 */ | |
1493 | case 'w': /* UTF16 */ | |
1494 | case 'd': /* UTF32 */ | |
1495 | mangled = dlang_parse_string (decl, mangled); | |
1496 | break; | |
1497 | ||
1498 | /* Array values. */ | |
1499 | case 'A': | |
1500 | mangled++; | |
1501 | if (type == 'H') | |
1502 | mangled = dlang_parse_assocarray (decl, mangled); | |
1503 | else | |
1504 | mangled = dlang_parse_arrayliteral (decl, mangled); | |
1505 | break; | |
1506 | ||
1507 | /* Struct values. */ | |
1508 | case 'S': | |
1509 | mangled++; | |
1510 | mangled = dlang_parse_structlit (decl, mangled, name); | |
1511 | break; | |
1512 | ||
1513 | default: | |
1514 | return NULL; | |
1515 | } | |
1516 | ||
1517 | return mangled; | |
1518 | } | |
1519 | ||
43b1b9ed IB |
1520 | /* Extract and demangle the symbol in MANGLED and append it to DECL. |
1521 | Returns the remaining signature on success or NULL on failure. */ | |
1522 | static const char * | |
3f30a274 | 1523 | dlang_parse_mangle (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed | 1524 | { |
5a4dbf7d IB |
1525 | /* A D mangled symbol is comprised of both scope and type information. |
1526 | ||
1527 | MangleName: | |
1528 | _D QualifiedName Type | |
5a4dbf7d IB |
1529 | _D QualifiedName Z |
1530 | ^ | |
1531 | The caller should have guaranteed that the start pointer is at the | |
1532 | above location. | |
3f30a274 IB |
1533 | Note that type is never a function type, but only the return type of |
1534 | a function or the type of a variable. | |
5a4dbf7d IB |
1535 | */ |
1536 | mangled += 2; | |
1537 | ||
3f30a274 | 1538 | mangled = dlang_parse_qualified (decl, mangled, info, 1); |
5a4dbf7d IB |
1539 | |
1540 | if (mangled != NULL) | |
1541 | { | |
1542 | /* Artificial symbols end with 'Z' and have no type. */ | |
1543 | if (*mangled == 'Z') | |
1544 | mangled++; | |
1545 | else | |
1546 | { | |
3f30a274 IB |
1547 | /* Discard the declaration or return type. */ |
1548 | string type; | |
5a4dbf7d | 1549 | |
3f30a274 IB |
1550 | string_init (&type); |
1551 | mangled = dlang_type (&type, mangled, info); | |
1552 | string_delete (&type); | |
5a4dbf7d IB |
1553 | } |
1554 | } | |
1555 | ||
5a4dbf7d IB |
1556 | return mangled; |
1557 | } | |
1558 | ||
1559 | /* Extract and demangle the qualified symbol in MANGLED and append it to DECL. | |
3f30a274 | 1560 | SUFFIX_MODIFIERS is 1 if we are printing modifiers on this after the symbol. |
5a4dbf7d IB |
1561 | Returns the remaining signature on success or NULL on failure. */ |
1562 | static const char * | |
1563 | dlang_parse_qualified (string *decl, const char *mangled, | |
3f30a274 | 1564 | struct dlang_info *info, int suffix_modifiers) |
5a4dbf7d IB |
1565 | { |
1566 | /* Qualified names are identifiers separated by their encoded length. | |
1567 | Nested functions also encode their argument types without specifying | |
1568 | what they return. | |
1569 | ||
1570 | QualifiedName: | |
3f30a274 IB |
1571 | SymbolFunctionName |
1572 | SymbolFunctionName QualifiedName | |
5a4dbf7d | 1573 | ^ |
3f30a274 IB |
1574 | |
1575 | SymbolFunctionName: | |
1576 | SymbolName | |
1577 | SymbolName TypeFunctionNoReturn | |
1578 | SymbolName M TypeFunctionNoReturn | |
1579 | SymbolName M TypeModifiers TypeFunctionNoReturn | |
1580 | ||
5a4dbf7d IB |
1581 | The start pointer should be at the above location. |
1582 | */ | |
43b1b9ed IB |
1583 | size_t n = 0; |
1584 | do | |
1585 | { | |
1586 | if (n++) | |
1587 | string_append (decl, "."); | |
1588 | ||
98bb7ee2 IB |
1589 | /* Skip over anonymous symbols. */ |
1590 | while (*mangled == '0') | |
1591 | mangled++; | |
1592 | ||
3f30a274 | 1593 | mangled = dlang_identifier (decl, mangled, info); |
43b1b9ed | 1594 | |
5a4dbf7d | 1595 | /* Consume the encoded arguments. However if this is not followed by the |
3f30a274 IB |
1596 | next encoded length or mangle type, then this is not a continuation of |
1597 | a qualified name, in which case we backtrack and return the current | |
1598 | unconsumed position of the mangled decl. */ | |
5a4dbf7d | 1599 | if (mangled && (*mangled == 'M' || dlang_call_convention_p (mangled))) |
43b1b9ed | 1600 | { |
3f30a274 | 1601 | string mods; |
5a4dbf7d IB |
1602 | const char *start = mangled; |
1603 | int saved = string_length (decl); | |
43b1b9ed | 1604 | |
3f30a274 IB |
1605 | /* Save the type modifiers for appending at the end if needed. */ |
1606 | string_init (&mods); | |
1607 | ||
5a4dbf7d | 1608 | /* Skip over 'this' parameter and type modifiers. */ |
43b1b9ed | 1609 | if (*mangled == 'M') |
7e865541 | 1610 | { |
5a4dbf7d | 1611 | mangled++; |
3f30a274 | 1612 | mangled = dlang_type_modifiers (&mods, mangled); |
5a4dbf7d | 1613 | string_setlength (decl, saved); |
7e865541 IB |
1614 | } |
1615 | ||
3f30a274 IB |
1616 | mangled = dlang_function_type_noreturn (decl, NULL, NULL, |
1617 | mangled, info); | |
1618 | if (suffix_modifiers) | |
1619 | string_appendn (decl, mods.b, string_length (&mods)); | |
43b1b9ed | 1620 | |
3f30a274 | 1621 | if (mangled == NULL || *mangled == '\0') |
7e865541 | 1622 | { |
5a4dbf7d | 1623 | /* Did not match the rule we were looking for. */ |
7e865541 | 1624 | mangled = start; |
5a4dbf7d | 1625 | string_setlength (decl, saved); |
7e865541 | 1626 | } |
3f30a274 IB |
1627 | |
1628 | string_delete (&mods); | |
43b1b9ed IB |
1629 | } |
1630 | } | |
3f30a274 | 1631 | while (mangled && dlang_symbol_name_p (mangled, info)); |
43b1b9ed IB |
1632 | |
1633 | return mangled; | |
1634 | } | |
1635 | ||
1636 | /* Demangle the tuple from MANGLED and append it to DECL. | |
1637 | Return the remaining string on success or NULL on failure. */ | |
1638 | static const char * | |
3f30a274 | 1639 | dlang_parse_tuple (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed | 1640 | { |
dbe65f77 | 1641 | long elements; |
43b1b9ed | 1642 | |
dbe65f77 IB |
1643 | mangled = dlang_number (mangled, &elements); |
1644 | if (mangled == NULL) | |
43b1b9ed IB |
1645 | return NULL; |
1646 | ||
43b1b9ed IB |
1647 | string_append (decl, "Tuple!("); |
1648 | ||
1649 | while (elements--) | |
1650 | { | |
3f30a274 | 1651 | mangled = dlang_type (decl, mangled, info); |
f181b8e7 B |
1652 | if (mangled == NULL) |
1653 | return NULL; | |
1654 | ||
43b1b9ed IB |
1655 | if (elements != 0) |
1656 | string_append (decl, ", "); | |
1657 | } | |
1658 | ||
1659 | string_append (decl, ")"); | |
1660 | return mangled; | |
1661 | } | |
1662 | ||
3f30a274 IB |
1663 | /* Demangle the template symbol parameter from MANGLED and append it to DECL. |
1664 | Return the remaining string on success or NULL on failure. */ | |
1665 | static const char * | |
1666 | dlang_template_symbol_param (string *decl, const char *mangled, | |
1667 | struct dlang_info *info) | |
1668 | { | |
1669 | if (strncmp (mangled, "_D", 2) == 0 | |
1670 | && dlang_symbol_name_p (mangled + 2, info)) | |
1671 | return dlang_parse_mangle (decl, mangled, info); | |
1672 | ||
1673 | if (*mangled == 'Q') | |
1674 | return dlang_parse_qualified (decl, mangled, info, 0); | |
1675 | ||
1676 | long len; | |
1677 | const char *endptr = dlang_number (mangled, &len); | |
1678 | ||
1679 | if (endptr == NULL || len == 0) | |
1680 | return NULL; | |
1681 | ||
1682 | /* In template parameter symbols generated by the frontend up to 2.076, | |
1683 | the symbol length is encoded and the first character of the mangled | |
1684 | name can be a digit. This causes ambiguity issues because the digits | |
1685 | of the two numbers are adjacent. */ | |
1686 | long psize = len; | |
1687 | const char *pend; | |
1688 | int saved = string_length (decl); | |
1689 | ||
1690 | /* Work backwards until a match is found. */ | |
1691 | for (pend = endptr; endptr != NULL; pend--) | |
1692 | { | |
1693 | mangled = pend; | |
1694 | ||
1695 | /* Reached the beginning of the pointer to the name length, | |
1696 | try parsing the entire symbol. */ | |
1697 | if (psize == 0) | |
1698 | { | |
1699 | psize = len; | |
1700 | pend = endptr; | |
1701 | endptr = NULL; | |
1702 | } | |
1703 | ||
1704 | /* Check whether template parameter is a function with a valid | |
1705 | return type or an untyped identifier. */ | |
1706 | if (dlang_symbol_name_p (mangled, info)) | |
1707 | mangled = dlang_parse_qualified (decl, mangled, info, 0); | |
1708 | else if (strncmp (mangled, "_D", 2) == 0 | |
1709 | && dlang_symbol_name_p (mangled + 2, info)) | |
1710 | mangled = dlang_parse_mangle (decl, mangled, info); | |
1711 | ||
1712 | /* Check for name length mismatch. */ | |
1713 | if (mangled && (endptr == NULL || (mangled - pend) == psize)) | |
1714 | return mangled; | |
1715 | ||
1716 | psize /= 10; | |
1717 | string_setlength (decl, saved); | |
1718 | } | |
1719 | ||
1720 | /* No match on any combinations. */ | |
1721 | return NULL; | |
1722 | } | |
1723 | ||
43b1b9ed IB |
1724 | /* Demangle the argument list from MANGLED and append it to DECL. |
1725 | Return the remaining string on success or NULL on failure. */ | |
1726 | static const char * | |
3f30a274 | 1727 | dlang_template_args (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed IB |
1728 | { |
1729 | size_t n = 0; | |
1730 | ||
1731 | while (mangled && *mangled != '\0') | |
1732 | { | |
1733 | switch (*mangled) | |
1734 | { | |
1735 | case 'Z': /* End of parameter list. */ | |
1736 | mangled++; | |
1737 | return mangled; | |
1738 | } | |
1739 | ||
1740 | if (n++) | |
1741 | string_append (decl, ", "); | |
1742 | ||
ed4cdb85 IB |
1743 | /* Skip over specialised template prefix. */ |
1744 | if (*mangled == 'H') | |
1745 | mangled++; | |
1746 | ||
43b1b9ed IB |
1747 | switch (*mangled) |
1748 | { | |
1749 | case 'S': /* Symbol parameter. */ | |
1750 | mangled++; | |
3f30a274 | 1751 | mangled = dlang_template_symbol_param (decl, mangled, info); |
43b1b9ed IB |
1752 | break; |
1753 | case 'T': /* Type parameter. */ | |
1754 | mangled++; | |
3f30a274 | 1755 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
1756 | break; |
1757 | case 'V': /* Value parameter. */ | |
1758 | { | |
1759 | string name; | |
1760 | char type; | |
1761 | ||
1762 | /* Peek at the type. */ | |
1763 | mangled++; | |
1764 | type = *mangled; | |
1765 | ||
3f30a274 IB |
1766 | if (type == 'Q') |
1767 | { | |
1768 | /* Value type is a back reference, peek at the real type. */ | |
1769 | const char *backref; | |
1770 | if (dlang_backref (mangled, &backref, info) == NULL) | |
1771 | return NULL; | |
1772 | ||
1773 | type = *backref; | |
1774 | } | |
1775 | ||
43b1b9ed IB |
1776 | /* In the few instances where the type is actually desired in |
1777 | the output, it should precede the value from dlang_value. */ | |
1778 | string_init (&name); | |
3f30a274 | 1779 | mangled = dlang_type (&name, mangled, info); |
43b1b9ed IB |
1780 | string_need (&name, 1); |
1781 | *(name.p) = '\0'; | |
1782 | ||
1783 | mangled = dlang_value (decl, mangled, name.b, type); | |
1784 | string_delete (&name); | |
1785 | break; | |
1786 | } | |
3f30a274 IB |
1787 | case 'X': /* Externally mangled parameter. */ |
1788 | { | |
1789 | long len; | |
1790 | const char *endptr; | |
43b1b9ed | 1791 | |
3f30a274 IB |
1792 | mangled++; |
1793 | endptr = dlang_number (mangled, &len); | |
1794 | if (endptr == NULL || strlen (endptr) < (size_t) len) | |
1795 | return NULL; | |
1796 | ||
1797 | string_appendn (decl, endptr, len); | |
1798 | mangled = endptr + len; | |
1799 | break; | |
1800 | } | |
43b1b9ed IB |
1801 | default: |
1802 | return NULL; | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | return mangled; | |
1807 | } | |
1808 | ||
1809 | /* Extract and demangle the template symbol in MANGLED, expected to | |
3f30a274 | 1810 | be made up of LEN characters (-1 if unknown), and append it to DECL. |
43b1b9ed IB |
1811 | Returns the remaining signature on success or NULL on failure. */ |
1812 | static const char * | |
3f30a274 IB |
1813 | dlang_parse_template (string *decl, const char *mangled, |
1814 | struct dlang_info *info, long len) | |
43b1b9ed IB |
1815 | { |
1816 | const char *start = mangled; | |
3f30a274 | 1817 | string args; |
43b1b9ed IB |
1818 | |
1819 | /* Template instance names have the types and values of its parameters | |
1820 | encoded into it. | |
1821 | ||
1822 | TemplateInstanceName: | |
1823 | Number __T LName TemplateArgs Z | |
c6f44bae | 1824 | Number __U LName TemplateArgs Z |
43b1b9ed IB |
1825 | ^ |
1826 | The start pointer should be at the above location, and LEN should be | |
1827 | the value of the decoded number. | |
1828 | */ | |
c6f44bae IB |
1829 | |
1830 | /* Template symbol. */ | |
3f30a274 | 1831 | if (!dlang_symbol_name_p (mangled + 3, info) || mangled[3] == '0') |
43b1b9ed IB |
1832 | return NULL; |
1833 | ||
1834 | mangled += 3; | |
1835 | ||
1836 | /* Template identifier. */ | |
3f30a274 | 1837 | mangled = dlang_identifier (decl, mangled, info); |
43b1b9ed IB |
1838 | |
1839 | /* Template arguments. */ | |
3f30a274 IB |
1840 | string_init (&args); |
1841 | mangled = dlang_template_args (&args, mangled, info); | |
1842 | ||
43b1b9ed | 1843 | string_append (decl, "!("); |
3f30a274 | 1844 | string_appendn (decl, args.b, string_length (&args)); |
43b1b9ed IB |
1845 | string_append (decl, ")"); |
1846 | ||
3f30a274 IB |
1847 | string_delete (&args); |
1848 | ||
43b1b9ed | 1849 | /* Check for template name length mismatch. */ |
3f30a274 | 1850 | if (len != TEMPLATE_LENGTH_UNKNOWN && mangled && (mangled - start) != len) |
43b1b9ed IB |
1851 | return NULL; |
1852 | ||
1853 | return mangled; | |
1854 | } | |
1855 | ||
3f30a274 IB |
1856 | /* Initialize the information structure we use to pass around information. */ |
1857 | static void | |
1858 | dlang_demangle_init_info (const char *mangled, int last_backref, | |
1859 | struct dlang_info *info) | |
1860 | { | |
1861 | info->s = mangled; | |
1862 | info->last_backref = last_backref; | |
1863 | } | |
1864 | ||
43b1b9ed IB |
1865 | /* Extract and demangle the symbol in MANGLED. Returns the demangled |
1866 | signature on success or NULL on failure. */ | |
1867 | ||
1868 | char * | |
1869 | dlang_demangle (const char *mangled, int option ATTRIBUTE_UNUSED) | |
1870 | { | |
1871 | string decl; | |
1872 | char *demangled = NULL; | |
1873 | ||
1874 | if (mangled == NULL || *mangled == '\0') | |
1875 | return NULL; | |
1876 | ||
1877 | if (strncmp (mangled, "_D", 2) != 0) | |
1878 | return NULL; | |
1879 | ||
1880 | string_init (&decl); | |
1881 | ||
1882 | if (strcmp (mangled, "_Dmain") == 0) | |
1883 | { | |
1884 | string_append (&decl, "D main"); | |
1885 | } | |
1886 | else | |
1887 | { | |
3f30a274 IB |
1888 | struct dlang_info info; |
1889 | ||
1890 | dlang_demangle_init_info (mangled, strlen (mangled), &info); | |
1891 | mangled = dlang_parse_mangle (&decl, mangled, &info); | |
1892 | ||
1893 | /* Check that the entire symbol was successfully demangled. */ | |
1894 | if (mangled == NULL || *mangled != '\0') | |
43b1b9ed IB |
1895 | string_delete (&decl); |
1896 | } | |
1897 | ||
1898 | if (string_length (&decl) > 0) | |
1899 | { | |
1900 | string_need (&decl, 1); | |
1901 | *(decl.p) = '\0'; | |
1902 | demangled = decl.b; | |
1903 | } | |
1904 | ||
1905 | return demangled; | |
1906 | } | |
1907 |