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43b1b9ed | 1 | /* Demangler for the D programming language |
99dee823 | 2 | Copyright (C) 2014-2021 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 | |
fff56ce4 AM |
34 | #ifdef HAVE_LIMITS_H |
35 | #include <limits.h> | |
36 | #endif | |
43b1b9ed IB |
37 | |
38 | #include "safe-ctype.h" | |
39 | ||
40 | #include <sys/types.h> | |
41 | #include <string.h> | |
42 | #include <stdio.h> | |
43 | ||
44 | #ifdef HAVE_STDLIB_H | |
45 | #include <stdlib.h> | |
43b1b9ed IB |
46 | #endif |
47 | ||
48 | #include <demangle.h> | |
49 | #include "libiberty.h" | |
50 | ||
fff56ce4 AM |
51 | #ifndef ULONG_MAX |
52 | #define ULONG_MAX (~0UL) | |
53 | #endif | |
54 | #ifndef UINT_MAX | |
55 | #define UINT_MAX (~0U) | |
56 | #endif | |
57 | ||
43b1b9ed IB |
58 | /* A mini string-handling package */ |
59 | ||
60 | typedef struct string /* Beware: these aren't required to be */ | |
61 | { /* '\0' terminated. */ | |
62 | char *b; /* pointer to start of string */ | |
63 | char *p; /* pointer after last character */ | |
64 | char *e; /* pointer after end of allocated space */ | |
65 | } string; | |
66 | ||
67 | static void | |
fff56ce4 | 68 | string_need (string *s, size_t n) |
43b1b9ed | 69 | { |
fff56ce4 | 70 | size_t tem; |
43b1b9ed IB |
71 | |
72 | if (s->b == NULL) | |
73 | { | |
74 | if (n < 32) | |
75 | { | |
76 | n = 32; | |
77 | } | |
78 | s->p = s->b = XNEWVEC (char, n); | |
79 | s->e = s->b + n; | |
80 | } | |
fff56ce4 | 81 | else if ((size_t) (s->e - s->p) < n) |
43b1b9ed IB |
82 | { |
83 | tem = s->p - s->b; | |
84 | n += tem; | |
85 | n *= 2; | |
86 | s->b = XRESIZEVEC (char, s->b, n); | |
87 | s->p = s->b + tem; | |
88 | s->e = s->b + n; | |
89 | } | |
90 | } | |
91 | ||
92 | static void | |
93 | string_delete (string *s) | |
94 | { | |
95 | if (s->b != NULL) | |
96 | { | |
97 | XDELETEVEC (s->b); | |
98 | s->b = s->e = s->p = NULL; | |
99 | } | |
100 | } | |
101 | ||
102 | static void | |
103 | string_init (string *s) | |
104 | { | |
105 | s->b = s->p = s->e = NULL; | |
106 | } | |
107 | ||
108 | static int | |
109 | string_length (string *s) | |
110 | { | |
111 | if (s->p == s->b) | |
112 | { | |
113 | return 0; | |
114 | } | |
115 | return s->p - s->b; | |
116 | } | |
117 | ||
118 | static void | |
119 | string_setlength (string *s, int n) | |
120 | { | |
121 | if (n - string_length (s) < 0) | |
122 | { | |
123 | s->p = s->b + n; | |
124 | } | |
125 | } | |
126 | ||
127 | static void | |
128 | string_append (string *p, const char *s) | |
129 | { | |
fff56ce4 | 130 | size_t n = strlen (s); |
43b1b9ed IB |
131 | string_need (p, n); |
132 | memcpy (p->p, s, n); | |
133 | p->p += n; | |
134 | } | |
135 | ||
136 | static void | |
fff56ce4 | 137 | string_appendn (string *p, const char *s, size_t n) |
43b1b9ed IB |
138 | { |
139 | if (n != 0) | |
140 | { | |
141 | string_need (p, n); | |
142 | memcpy (p->p, s, n); | |
143 | p->p += n; | |
144 | } | |
145 | } | |
146 | ||
147 | static void | |
fff56ce4 | 148 | string_prependn (string *p, const char *s, size_t n) |
43b1b9ed IB |
149 | { |
150 | char *q; | |
151 | ||
152 | if (n != 0) | |
153 | { | |
154 | string_need (p, n); | |
155 | for (q = p->p - 1; q >= p->b; q--) | |
156 | { | |
157 | q[n] = q[0]; | |
158 | } | |
159 | memcpy (p->b, s, n); | |
160 | p->p += n; | |
161 | } | |
162 | } | |
163 | ||
164 | static void | |
165 | string_prepend (string *p, const char *s) | |
166 | { | |
167 | if (s != NULL && *s != '\0') | |
168 | { | |
169 | string_prependn (p, s, strlen (s)); | |
170 | } | |
171 | } | |
172 | ||
3f30a274 IB |
173 | /* Demangle information structure we pass around. */ |
174 | struct dlang_info | |
7e865541 | 175 | { |
3f30a274 IB |
176 | /* The string we are demangling. */ |
177 | const char *s; | |
178 | /* The index of the last back reference. */ | |
179 | int last_backref; | |
7e865541 IB |
180 | }; |
181 | ||
3f30a274 | 182 | /* Pass as the LEN to dlang_parse_template if symbol length is not known. */ |
fff56ce4 | 183 | #define TEMPLATE_LENGTH_UNKNOWN (-1UL) |
3f30a274 | 184 | |
43b1b9ed | 185 | /* Prototypes for forward referenced functions */ |
3f30a274 IB |
186 | static const char *dlang_function_type (string *, const char *, |
187 | struct dlang_info *); | |
43b1b9ed | 188 | |
3f30a274 IB |
189 | static const char *dlang_function_args (string *, const char *, |
190 | struct dlang_info *); | |
191 | ||
192 | static const char *dlang_type (string *, const char *, struct dlang_info *); | |
43b1b9ed IB |
193 | |
194 | static const char *dlang_value (string *, const char *, const char *, char); | |
195 | ||
5a4dbf7d | 196 | static const char *dlang_parse_qualified (string *, const char *, |
3f30a274 | 197 | struct dlang_info *, int); |
5a4dbf7d IB |
198 | |
199 | static const char *dlang_parse_mangle (string *, const char *, | |
3f30a274 IB |
200 | struct dlang_info *); |
201 | ||
202 | static const char *dlang_parse_tuple (string *, const char *, | |
203 | struct dlang_info *); | |
43b1b9ed | 204 | |
3f30a274 | 205 | static const char *dlang_parse_template (string *, const char *, |
fff56ce4 | 206 | struct dlang_info *, unsigned long); |
43b1b9ed | 207 | |
fff56ce4 | 208 | static const char *dlang_lname (string *, const char *, unsigned long); |
43b1b9ed IB |
209 | |
210 | ||
dbe65f77 | 211 | /* Extract the number from MANGLED, and assign the result to RET. |
fff56ce4 AM |
212 | Return the remaining string on success or NULL on failure. |
213 | A result larger than UINT_MAX is considered a failure. */ | |
dbe65f77 | 214 | static const char * |
fff56ce4 | 215 | dlang_number (const char *mangled, unsigned long *ret) |
dbe65f77 IB |
216 | { |
217 | /* Return NULL if trying to extract something that isn't a digit. */ | |
218 | if (mangled == NULL || !ISDIGIT (*mangled)) | |
219 | return NULL; | |
220 | ||
fff56ce4 | 221 | unsigned long val = 0; |
dbe65f77 IB |
222 | |
223 | while (ISDIGIT (*mangled)) | |
224 | { | |
fff56ce4 | 225 | unsigned long digit = mangled[0] - '0'; |
dbe65f77 | 226 | |
fff56ce4 AM |
227 | /* Check for overflow. */ |
228 | if (val > (UINT_MAX - digit) / 10) | |
dbe65f77 IB |
229 | return NULL; |
230 | ||
fff56ce4 | 231 | val = val * 10 + digit; |
dbe65f77 IB |
232 | mangled++; |
233 | } | |
234 | ||
fff56ce4 | 235 | if (*mangled == '\0') |
dbe65f77 IB |
236 | return NULL; |
237 | ||
fff56ce4 | 238 | *ret = val; |
dbe65f77 IB |
239 | return mangled; |
240 | } | |
241 | ||
5398cab9 IB |
242 | /* Extract the hex-digit from MANGLED, and assign the result to RET. |
243 | Return the remaining string on success or NULL on failure. */ | |
244 | static const char * | |
245 | dlang_hexdigit (const char *mangled, char *ret) | |
246 | { | |
247 | char c; | |
248 | ||
249 | /* Return NULL if trying to extract something that isn't a hexdigit. */ | |
250 | if (mangled == NULL || !ISXDIGIT (mangled[0]) || !ISXDIGIT (mangled[1])) | |
251 | return NULL; | |
252 | ||
253 | c = mangled[0]; | |
254 | if (!ISDIGIT (c)) | |
255 | (*ret) = (c - (ISUPPER (c) ? 'A' : 'a') + 10); | |
256 | else | |
257 | (*ret) = (c - '0'); | |
258 | ||
259 | c = mangled[1]; | |
260 | if (!ISDIGIT (c)) | |
261 | (*ret) = (*ret << 4) | (c - (ISUPPER (c) ? 'A' : 'a') + 10); | |
262 | else | |
263 | (*ret) = (*ret << 4) | (c - '0'); | |
264 | ||
265 | mangled += 2; | |
266 | ||
267 | return mangled; | |
268 | } | |
269 | ||
0e3712f6 IB |
270 | /* Extract the function calling convention from MANGLED and |
271 | return 1 on success or 0 on failure. */ | |
272 | static int | |
273 | dlang_call_convention_p (const char *mangled) | |
274 | { | |
275 | switch (*mangled) | |
276 | { | |
277 | case 'F': case 'U': case 'V': | |
278 | case 'W': case 'R': case 'Y': | |
279 | return 1; | |
280 | ||
281 | default: | |
282 | return 0; | |
283 | } | |
284 | } | |
285 | ||
3f30a274 | 286 | /* Extract the back reference position from MANGLED, and assign the result |
fff56ce4 AM |
287 | to RET. Return the remaining string on success or NULL on failure. |
288 | A result <= 0 is a failure. */ | |
3f30a274 IB |
289 | static const char * |
290 | dlang_decode_backref (const char *mangled, long *ret) | |
291 | { | |
292 | /* Return NULL if trying to extract something that isn't a digit. */ | |
293 | if (mangled == NULL || !ISALPHA (*mangled)) | |
294 | return NULL; | |
295 | ||
296 | /* Any identifier or non-basic type that has been emitted to the mangled | |
297 | symbol before will not be emitted again, but is referenced by a special | |
298 | sequence encoding the relative position of the original occurrence in the | |
299 | mangled symbol name. | |
300 | ||
301 | Numbers in back references are encoded with base 26 by upper case letters | |
302 | A-Z for higher digits but lower case letters a-z for the last digit. | |
303 | ||
304 | NumberBackRef: | |
305 | [a-z] | |
306 | [A-Z] NumberBackRef | |
307 | ^ | |
308 | */ | |
fff56ce4 | 309 | unsigned long val = 0; |
3f30a274 IB |
310 | |
311 | while (ISALPHA (*mangled)) | |
312 | { | |
fff56ce4 AM |
313 | /* Check for overflow. */ |
314 | if (val > (ULONG_MAX - 25) / 26) | |
315 | break; | |
3f30a274 | 316 | |
fff56ce4 | 317 | val *= 26; |
3f30a274 IB |
318 | |
319 | if (mangled[0] >= 'a' && mangled[0] <= 'z') | |
320 | { | |
fff56ce4 AM |
321 | val += mangled[0] - 'a'; |
322 | if ((long) val <= 0) | |
323 | break; | |
324 | *ret = val; | |
3f30a274 IB |
325 | return mangled + 1; |
326 | } | |
327 | ||
fff56ce4 | 328 | val += mangled[0] - 'A'; |
3f30a274 IB |
329 | mangled++; |
330 | } | |
331 | ||
332 | return NULL; | |
333 | } | |
334 | ||
335 | /* Extract the symbol pointed at by the back reference and assign the result | |
336 | to RET. Return the remaining string on success or NULL on failure. */ | |
337 | static const char * | |
338 | dlang_backref (const char *mangled, const char **ret, struct dlang_info *info) | |
339 | { | |
340 | (*ret) = NULL; | |
341 | ||
342 | if (mangled == NULL || *mangled != 'Q') | |
343 | return NULL; | |
344 | ||
345 | /* Position of 'Q'. */ | |
346 | const char *qpos = mangled; | |
347 | long refpos; | |
348 | mangled++; | |
349 | ||
350 | mangled = dlang_decode_backref (mangled, &refpos); | |
351 | if (mangled == NULL) | |
352 | return NULL; | |
353 | ||
fff56ce4 | 354 | if (refpos > qpos - info->s) |
3f30a274 IB |
355 | return NULL; |
356 | ||
357 | /* Set the position of the back reference. */ | |
358 | (*ret) = qpos - refpos; | |
359 | ||
360 | return mangled; | |
361 | } | |
362 | ||
363 | /* Demangle a back referenced symbol from MANGLED and append it to DECL. | |
364 | Return the remaining string on success or NULL on failure. */ | |
365 | static const char * | |
366 | dlang_symbol_backref (string *decl, const char *mangled, | |
367 | struct dlang_info *info) | |
368 | { | |
369 | /* An identifier back reference always points to a digit 0 to 9. | |
370 | ||
371 | IdentifierBackRef: | |
372 | Q NumberBackRef | |
373 | ^ | |
374 | */ | |
375 | const char *backref; | |
fff56ce4 | 376 | unsigned long len; |
3f30a274 IB |
377 | |
378 | /* Get position of the back reference. */ | |
379 | mangled = dlang_backref (mangled, &backref, info); | |
380 | ||
381 | /* Must point to a simple identifier. */ | |
382 | backref = dlang_number (backref, &len); | |
383 | if (backref == NULL) | |
384 | return NULL; | |
385 | ||
386 | backref = dlang_lname (decl, backref, len); | |
387 | if (backref == NULL) | |
388 | return NULL; | |
389 | ||
390 | return mangled; | |
391 | } | |
392 | ||
393 | /* Demangle a back referenced type from MANGLED and append it to DECL. | |
394 | IS_FUNCTION is 1 if the back referenced type is expected to be a function. | |
395 | Return the remaining string on success or NULL on failure. */ | |
396 | static const char * | |
397 | dlang_type_backref (string *decl, const char *mangled, struct dlang_info *info, | |
398 | int is_function) | |
399 | { | |
400 | /* A type back reference always points to a letter. | |
401 | ||
402 | TypeBackRef: | |
403 | Q NumberBackRef | |
404 | ^ | |
405 | */ | |
406 | const char *backref; | |
407 | ||
408 | /* If we appear to be moving backwards through the mangle string, then | |
409 | bail as this may be a recursive back reference. */ | |
410 | if (mangled - info->s >= info->last_backref) | |
411 | return NULL; | |
412 | ||
413 | int save_refpos = info->last_backref; | |
414 | info->last_backref = mangled - info->s; | |
415 | ||
416 | /* Get position of the back reference. */ | |
417 | mangled = dlang_backref (mangled, &backref, info); | |
418 | ||
419 | /* Must point to a type. */ | |
420 | if (is_function) | |
421 | backref = dlang_function_type (decl, backref, info); | |
422 | else | |
423 | backref = dlang_type (decl, backref, info); | |
424 | ||
425 | info->last_backref = save_refpos; | |
426 | ||
427 | if (backref == NULL) | |
428 | return NULL; | |
429 | ||
430 | return mangled; | |
431 | } | |
432 | ||
433 | /* Extract the beginning of a symbol name from MANGLED and | |
434 | return 1 on success or 0 on failure. */ | |
435 | static int | |
436 | dlang_symbol_name_p (const char *mangled, struct dlang_info *info) | |
437 | { | |
438 | long ret; | |
439 | const char *qref = mangled; | |
440 | ||
441 | if (ISDIGIT (*mangled)) | |
442 | return 1; | |
443 | ||
444 | if (mangled[0] == '_' && mangled[1] == '_' | |
445 | && (mangled[2] == 'T' || mangled[2] == 'U')) | |
446 | return 1; | |
447 | ||
448 | if (*mangled != 'Q') | |
449 | return 0; | |
450 | ||
451 | mangled = dlang_decode_backref (mangled + 1, &ret); | |
fff56ce4 | 452 | if (mangled == NULL || ret > qref - info->s) |
3f30a274 IB |
453 | return 0; |
454 | ||
455 | return ISDIGIT (qref[-ret]); | |
456 | } | |
457 | ||
43b1b9ed IB |
458 | /* Demangle the calling convention from MANGLED and append it to DECL. |
459 | Return the remaining string on success or NULL on failure. */ | |
460 | static const char * | |
461 | dlang_call_convention (string *decl, const char *mangled) | |
462 | { | |
463 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 464 | return NULL; |
43b1b9ed IB |
465 | |
466 | switch (*mangled) | |
467 | { | |
468 | case 'F': /* (D) */ | |
469 | mangled++; | |
470 | break; | |
471 | case 'U': /* (C) */ | |
472 | mangled++; | |
473 | string_append (decl, "extern(C) "); | |
474 | break; | |
475 | case 'W': /* (Windows) */ | |
476 | mangled++; | |
477 | string_append (decl, "extern(Windows) "); | |
478 | break; | |
479 | case 'V': /* (Pascal) */ | |
480 | mangled++; | |
481 | string_append (decl, "extern(Pascal) "); | |
482 | break; | |
483 | case 'R': /* (C++) */ | |
484 | mangled++; | |
485 | string_append (decl, "extern(C++) "); | |
486 | break; | |
13617162 IB |
487 | case 'Y': /* (Objective-C) */ |
488 | mangled++; | |
489 | string_append (decl, "extern(Objective-C) "); | |
490 | break; | |
43b1b9ed IB |
491 | default: |
492 | return NULL; | |
493 | } | |
494 | ||
495 | return mangled; | |
496 | } | |
497 | ||
fa66ced4 IB |
498 | /* Extract the type modifiers from MANGLED and append them to DECL. |
499 | Returns the remaining signature on success or NULL on failure. */ | |
500 | static const char * | |
501 | dlang_type_modifiers (string *decl, const char *mangled) | |
502 | { | |
503 | if (mangled == NULL || *mangled == '\0') | |
504 | return NULL; | |
505 | ||
506 | switch (*mangled) | |
507 | { | |
508 | case 'x': /* const */ | |
509 | mangled++; | |
510 | string_append (decl, " const"); | |
511 | return mangled; | |
512 | case 'y': /* immutable */ | |
513 | mangled++; | |
514 | string_append (decl, " immutable"); | |
515 | return mangled; | |
516 | case 'O': /* shared */ | |
517 | mangled++; | |
518 | string_append (decl, " shared"); | |
519 | return dlang_type_modifiers (decl, mangled); | |
520 | case 'N': | |
521 | mangled++; | |
522 | if (*mangled == 'g') /* wild */ | |
523 | { | |
524 | mangled++; | |
525 | string_append (decl, " inout"); | |
526 | return dlang_type_modifiers (decl, mangled); | |
527 | } | |
528 | else | |
529 | return NULL; | |
530 | ||
531 | default: | |
532 | return mangled; | |
533 | } | |
534 | } | |
535 | ||
43b1b9ed IB |
536 | /* Demangle the D function attributes from MANGLED and append it to DECL. |
537 | Return the remaining string on success or NULL on failure. */ | |
538 | static const char * | |
539 | dlang_attributes (string *decl, const char *mangled) | |
540 | { | |
541 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 542 | return NULL; |
43b1b9ed IB |
543 | |
544 | while (*mangled == 'N') | |
545 | { | |
546 | mangled++; | |
547 | switch (*mangled) | |
548 | { | |
549 | case 'a': /* pure */ | |
550 | mangled++; | |
551 | string_append (decl, "pure "); | |
552 | continue; | |
553 | case 'b': /* nothrow */ | |
554 | mangled++; | |
555 | string_append (decl, "nothrow "); | |
556 | continue; | |
557 | case 'c': /* ref */ | |
558 | mangled++; | |
559 | string_append (decl, "ref "); | |
560 | continue; | |
561 | case 'd': /* @property */ | |
562 | mangled++; | |
563 | string_append (decl, "@property "); | |
564 | continue; | |
565 | case 'e': /* @trusted */ | |
566 | mangled++; | |
567 | string_append (decl, "@trusted "); | |
568 | continue; | |
569 | case 'f': /* @safe */ | |
570 | mangled++; | |
571 | string_append (decl, "@safe "); | |
572 | continue; | |
573 | case 'g': | |
574 | case 'h': | |
7ce4461f | 575 | case 'k': |
0e32a5aa | 576 | case 'n': |
43b1b9ed IB |
577 | /* inout parameter is represented as 'Ng'. |
578 | vector parameter is represented as 'Nh'. | |
0e32a5aa IB |
579 | return parameter is represented as 'Nk'. |
580 | typeof(*null) parameter is represented as 'Nn'. | |
43b1b9ed IB |
581 | If we see this, then we know we're really in the |
582 | parameter list. Rewind and break. */ | |
583 | mangled--; | |
584 | break; | |
585 | case 'i': /* @nogc */ | |
586 | mangled++; | |
587 | string_append (decl, "@nogc "); | |
588 | continue; | |
7ce4461f IB |
589 | case 'j': /* return */ |
590 | mangled++; | |
591 | string_append (decl, "return "); | |
592 | continue; | |
ec89d258 IB |
593 | case 'l': /* scope */ |
594 | mangled++; | |
595 | string_append (decl, "scope "); | |
596 | continue; | |
3a55774f IB |
597 | case 'm': /* @live */ |
598 | mangled++; | |
599 | string_append (decl, "@live "); | |
600 | continue; | |
7ce4461f IB |
601 | |
602 | default: /* unknown attribute */ | |
603 | return NULL; | |
43b1b9ed IB |
604 | } |
605 | break; | |
606 | } | |
607 | ||
608 | return mangled; | |
609 | } | |
610 | ||
3f30a274 IB |
611 | /* Demangle the function type from MANGLED without the return type. |
612 | The arguments are appended to ARGS, the calling convention is appended | |
613 | to CALL and attributes are appended to ATTR. Any of these can be NULL | |
614 | to throw the information away. Return the remaining string on success | |
615 | or NULL on failure. */ | |
616 | static const char * | |
617 | dlang_function_type_noreturn (string *args, string *call, string *attr, | |
618 | const char *mangled, struct dlang_info *info) | |
619 | { | |
620 | string dump; | |
621 | string_init (&dump); | |
622 | ||
623 | /* Skip over calling convention and attributes. */ | |
624 | mangled = dlang_call_convention (call ? call : &dump, mangled); | |
625 | mangled = dlang_attributes (attr ? attr : &dump, mangled); | |
626 | ||
627 | if (args) | |
628 | string_append (args, "("); | |
629 | ||
630 | mangled = dlang_function_args (args ? args : &dump, mangled, info); | |
631 | if (args) | |
632 | string_append (args, ")"); | |
633 | ||
634 | string_delete (&dump); | |
635 | return mangled; | |
636 | } | |
637 | ||
43b1b9ed IB |
638 | /* Demangle the function type from MANGLED and append it to DECL. |
639 | Return the remaining string on success or NULL on failure. */ | |
640 | static const char * | |
3f30a274 | 641 | dlang_function_type (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed IB |
642 | { |
643 | string attr, args, type; | |
43b1b9ed IB |
644 | |
645 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 646 | return NULL; |
43b1b9ed IB |
647 | |
648 | /* The order of the mangled string is: | |
649 | CallConvention FuncAttrs Arguments ArgClose Type | |
650 | ||
651 | The demangled string is re-ordered as: | |
652 | CallConvention Type Arguments FuncAttrs | |
653 | */ | |
654 | string_init (&attr); | |
655 | string_init (&args); | |
656 | string_init (&type); | |
657 | ||
3f30a274 | 658 | mangled = dlang_function_type_noreturn (&args, decl, &attr, mangled, info); |
43b1b9ed IB |
659 | |
660 | /* Function return type. */ | |
3f30a274 | 661 | mangled = dlang_type (&type, mangled, info); |
43b1b9ed IB |
662 | |
663 | /* Append to decl in order. */ | |
3f30a274 IB |
664 | string_appendn (decl, type.b, string_length (&type)); |
665 | string_appendn (decl, args.b, string_length (&args)); | |
666 | string_append (decl, " "); | |
667 | string_appendn (decl, attr.b, string_length (&attr)); | |
43b1b9ed IB |
668 | |
669 | string_delete (&attr); | |
670 | string_delete (&args); | |
671 | string_delete (&type); | |
672 | return mangled; | |
673 | } | |
674 | ||
675 | /* Demangle the argument list from MANGLED and append it to DECL. | |
676 | Return the remaining string on success or NULL on failure. */ | |
677 | static const char * | |
3f30a274 | 678 | dlang_function_args (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed IB |
679 | { |
680 | size_t n = 0; | |
681 | ||
682 | while (mangled && *mangled != '\0') | |
683 | { | |
684 | switch (*mangled) | |
685 | { | |
686 | case 'X': /* (variadic T t...) style. */ | |
687 | mangled++; | |
688 | string_append (decl, "..."); | |
689 | return mangled; | |
690 | case 'Y': /* (variadic T t, ...) style. */ | |
691 | mangled++; | |
acf1f7da IB |
692 | if (n != 0) |
693 | string_append (decl, ", "); | |
694 | string_append (decl, "..."); | |
43b1b9ed IB |
695 | return mangled; |
696 | case 'Z': /* Normal function. */ | |
697 | mangled++; | |
698 | return mangled; | |
699 | } | |
700 | ||
701 | if (n++) | |
702 | string_append (decl, ", "); | |
703 | ||
704 | if (*mangled == 'M') /* scope(T) */ | |
705 | { | |
706 | mangled++; | |
707 | string_append (decl, "scope "); | |
708 | } | |
709 | ||
7ce4461f IB |
710 | if (mangled[0] == 'N' && mangled[1] == 'k') /* return(T) */ |
711 | { | |
712 | mangled += 2; | |
713 | string_append (decl, "return "); | |
714 | } | |
715 | ||
43b1b9ed IB |
716 | switch (*mangled) |
717 | { | |
387d0773 IB |
718 | case 'I': /* in(T) */ |
719 | mangled++; | |
720 | string_append (decl, "in "); | |
721 | if (*mangled == 'K') /* in ref(T) */ | |
722 | { | |
723 | mangled++; | |
724 | string_append (decl, "ref "); | |
725 | } | |
726 | break; | |
43b1b9ed IB |
727 | case 'J': /* out(T) */ |
728 | mangled++; | |
729 | string_append (decl, "out "); | |
730 | break; | |
731 | case 'K': /* ref(T) */ | |
732 | mangled++; | |
733 | string_append (decl, "ref "); | |
734 | break; | |
735 | case 'L': /* lazy(T) */ | |
736 | mangled++; | |
737 | string_append (decl, "lazy "); | |
738 | break; | |
739 | } | |
3f30a274 | 740 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
741 | } |
742 | ||
743 | return mangled; | |
744 | } | |
745 | ||
746 | /* Demangle the type from MANGLED and append it to DECL. | |
747 | Return the remaining string on success or NULL on failure. */ | |
748 | static const char * | |
3f30a274 | 749 | dlang_type (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed IB |
750 | { |
751 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 752 | return NULL; |
43b1b9ed IB |
753 | |
754 | switch (*mangled) | |
755 | { | |
756 | case 'O': /* shared(T) */ | |
757 | mangled++; | |
758 | string_append (decl, "shared("); | |
3f30a274 | 759 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
760 | string_append (decl, ")"); |
761 | return mangled; | |
762 | case 'x': /* const(T) */ | |
763 | mangled++; | |
764 | string_append (decl, "const("); | |
3f30a274 | 765 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
766 | string_append (decl, ")"); |
767 | return mangled; | |
768 | case 'y': /* immutable(T) */ | |
769 | mangled++; | |
770 | string_append (decl, "immutable("); | |
3f30a274 | 771 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
772 | string_append (decl, ")"); |
773 | return mangled; | |
774 | case 'N': | |
775 | mangled++; | |
776 | if (*mangled == 'g') /* wild(T) */ | |
777 | { | |
778 | mangled++; | |
779 | string_append (decl, "inout("); | |
3f30a274 | 780 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
781 | string_append (decl, ")"); |
782 | return mangled; | |
783 | } | |
784 | else if (*mangled == 'h') /* vector(T) */ | |
785 | { | |
786 | mangled++; | |
787 | string_append (decl, "__vector("); | |
3f30a274 | 788 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
789 | string_append (decl, ")"); |
790 | return mangled; | |
791 | } | |
0e32a5aa IB |
792 | else if (*mangled == 'n') /* typeof(*null) */ |
793 | { | |
794 | mangled++; | |
795 | string_append (decl, "typeof(*null)"); | |
796 | return mangled; | |
797 | } | |
43b1b9ed IB |
798 | else |
799 | return NULL; | |
800 | case 'A': /* dynamic array (T[]) */ | |
801 | mangled++; | |
3f30a274 | 802 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
803 | string_append (decl, "[]"); |
804 | return mangled; | |
805 | case 'G': /* static array (T[N]) */ | |
806 | { | |
807 | const char *numptr; | |
808 | size_t num = 0; | |
809 | mangled++; | |
810 | ||
811 | numptr = mangled; | |
812 | while (ISDIGIT (*mangled)) | |
813 | { | |
814 | num++; | |
815 | mangled++; | |
816 | } | |
3f30a274 | 817 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
818 | string_append (decl, "["); |
819 | string_appendn (decl, numptr, num); | |
820 | string_append (decl, "]"); | |
821 | return mangled; | |
822 | } | |
823 | case 'H': /* associative array (T[T]) */ | |
824 | { | |
825 | string type; | |
826 | size_t sztype; | |
827 | mangled++; | |
828 | ||
829 | string_init (&type); | |
3f30a274 | 830 | mangled = dlang_type (&type, mangled, info); |
43b1b9ed IB |
831 | sztype = string_length (&type); |
832 | ||
3f30a274 | 833 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
834 | string_append (decl, "["); |
835 | string_appendn (decl, type.b, sztype); | |
836 | string_append (decl, "]"); | |
837 | ||
838 | string_delete (&type); | |
839 | return mangled; | |
840 | } | |
841 | case 'P': /* pointer (T*) */ | |
842 | mangled++; | |
0e3712f6 | 843 | if (!dlang_call_convention_p (mangled)) |
0f4b8b31 | 844 | { |
3f30a274 | 845 | mangled = dlang_type (decl, mangled, info); |
0e3712f6 | 846 | string_append (decl, "*"); |
0f4b8b31 IB |
847 | return mangled; |
848 | } | |
0e3712f6 IB |
849 | /* Fall through */ |
850 | case 'F': /* function T (D) */ | |
851 | case 'U': /* function T (C) */ | |
852 | case 'W': /* function T (Windows) */ | |
853 | case 'V': /* function T (Pascal) */ | |
854 | case 'R': /* function T (C++) */ | |
855 | case 'Y': /* function T (Objective-C) */ | |
856 | /* Function pointer types don't include the trailing asterisk. */ | |
3f30a274 | 857 | mangled = dlang_function_type (decl, mangled, info); |
0e3712f6 | 858 | string_append (decl, "function"); |
43b1b9ed | 859 | return mangled; |
43b1b9ed IB |
860 | case 'C': /* class T */ |
861 | case 'S': /* struct T */ | |
862 | case 'E': /* enum T */ | |
863 | case 'T': /* typedef T */ | |
864 | mangled++; | |
3f30a274 | 865 | return dlang_parse_qualified (decl, mangled, info, 0); |
43b1b9ed | 866 | case 'D': /* delegate T */ |
fa66ced4 IB |
867 | { |
868 | string mods; | |
869 | size_t szmods; | |
43b1b9ed | 870 | mangled++; |
fa66ced4 IB |
871 | |
872 | string_init (&mods); | |
873 | mangled = dlang_type_modifiers (&mods, mangled); | |
874 | szmods = string_length (&mods); | |
875 | ||
3f30a274 IB |
876 | /* Back referenced function type. */ |
877 | if (*mangled == 'Q') | |
878 | mangled = dlang_type_backref (decl, mangled, info, 1); | |
879 | else | |
880 | mangled = dlang_function_type (decl, mangled, info); | |
881 | ||
43b1b9ed | 882 | string_append (decl, "delegate"); |
fa66ced4 IB |
883 | string_appendn (decl, mods.b, szmods); |
884 | ||
885 | string_delete (&mods); | |
43b1b9ed | 886 | return mangled; |
fa66ced4 | 887 | } |
43b1b9ed IB |
888 | case 'B': /* tuple T */ |
889 | mangled++; | |
3f30a274 | 890 | return dlang_parse_tuple (decl, mangled, info); |
43b1b9ed | 891 | |
43b1b9ed IB |
892 | /* Basic types */ |
893 | case 'n': | |
894 | mangled++; | |
0e32a5aa | 895 | string_append (decl, "typeof(null)"); |
43b1b9ed IB |
896 | return mangled; |
897 | case 'v': | |
898 | mangled++; | |
899 | string_append (decl, "void"); | |
900 | return mangled; | |
901 | case 'g': | |
902 | mangled++; | |
903 | string_append (decl, "byte"); | |
904 | return mangled; | |
905 | case 'h': | |
906 | mangled++; | |
907 | string_append (decl, "ubyte"); | |
908 | return mangled; | |
909 | case 's': | |
910 | mangled++; | |
911 | string_append (decl, "short"); | |
912 | return mangled; | |
913 | case 't': | |
914 | mangled++; | |
915 | string_append (decl, "ushort"); | |
916 | return mangled; | |
917 | case 'i': | |
918 | mangled++; | |
919 | string_append (decl, "int"); | |
920 | return mangled; | |
921 | case 'k': | |
922 | mangled++; | |
923 | string_append (decl, "uint"); | |
924 | return mangled; | |
925 | case 'l': | |
926 | mangled++; | |
927 | string_append (decl, "long"); | |
928 | return mangled; | |
929 | case 'm': | |
930 | mangled++; | |
931 | string_append (decl, "ulong"); | |
932 | return mangled; | |
933 | case 'f': | |
934 | mangled++; | |
935 | string_append (decl, "float"); | |
936 | return mangled; | |
937 | case 'd': | |
938 | mangled++; | |
939 | string_append (decl, "double"); | |
940 | return mangled; | |
941 | case 'e': | |
942 | mangled++; | |
943 | string_append (decl, "real"); | |
944 | return mangled; | |
945 | ||
946 | /* Imaginary and Complex types */ | |
947 | case 'o': | |
948 | mangled++; | |
949 | string_append (decl, "ifloat"); | |
950 | return mangled; | |
951 | case 'p': | |
952 | mangled++; | |
953 | string_append (decl, "idouble"); | |
954 | return mangled; | |
955 | case 'j': | |
956 | mangled++; | |
957 | string_append (decl, "ireal"); | |
958 | return mangled; | |
959 | case 'q': | |
960 | mangled++; | |
961 | string_append (decl, "cfloat"); | |
962 | return mangled; | |
963 | case 'r': | |
964 | mangled++; | |
965 | string_append (decl, "cdouble"); | |
966 | return mangled; | |
967 | case 'c': | |
968 | mangled++; | |
969 | string_append (decl, "creal"); | |
970 | return mangled; | |
971 | ||
972 | /* Other types */ | |
973 | case 'b': | |
974 | mangled++; | |
975 | string_append (decl, "bool"); | |
976 | return mangled; | |
977 | case 'a': | |
978 | mangled++; | |
979 | string_append (decl, "char"); | |
980 | return mangled; | |
981 | case 'u': | |
982 | mangled++; | |
983 | string_append (decl, "wchar"); | |
984 | return mangled; | |
985 | case 'w': | |
986 | mangled++; | |
987 | string_append (decl, "dchar"); | |
988 | return mangled; | |
59251a73 IB |
989 | case 'z': |
990 | mangled++; | |
991 | switch (*mangled) | |
992 | { | |
993 | case 'i': | |
994 | mangled++; | |
995 | string_append (decl, "cent"); | |
996 | return mangled; | |
997 | case 'k': | |
998 | mangled++; | |
999 | string_append (decl, "ucent"); | |
1000 | return mangled; | |
1001 | } | |
1002 | return NULL; | |
43b1b9ed | 1003 | |
3f30a274 IB |
1004 | /* Back referenced type. */ |
1005 | case 'Q': | |
1006 | return dlang_type_backref (decl, mangled, info, 0); | |
1007 | ||
43b1b9ed IB |
1008 | default: /* unhandled */ |
1009 | return NULL; | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | /* Extract the identifier from MANGLED and append it to DECL. | |
1014 | Return the remaining string on success or NULL on failure. */ | |
1015 | static const char * | |
3f30a274 | 1016 | dlang_identifier (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed | 1017 | { |
fff56ce4 | 1018 | unsigned long len; |
7e865541 | 1019 | |
3f30a274 | 1020 | if (mangled == NULL || *mangled == '\0') |
7e865541 IB |
1021 | return NULL; |
1022 | ||
3f30a274 IB |
1023 | if (*mangled == 'Q') |
1024 | return dlang_symbol_backref (decl, mangled, info); | |
43b1b9ed | 1025 | |
3f30a274 IB |
1026 | /* May be a template instance without a length prefix. */ |
1027 | if (mangled[0] == '_' && mangled[1] == '_' | |
1028 | && (mangled[2] == 'T' || mangled[2] == 'U')) | |
1029 | return dlang_parse_template (decl, mangled, info, TEMPLATE_LENGTH_UNKNOWN); | |
7e865541 | 1030 | |
3f30a274 | 1031 | const char *endptr = dlang_number (mangled, &len); |
7e865541 | 1032 | |
3f30a274 IB |
1033 | if (endptr == NULL || len == 0) |
1034 | return NULL; | |
7e865541 | 1035 | |
fff56ce4 | 1036 | if (strlen (endptr) < len) |
3f30a274 | 1037 | return NULL; |
7e865541 | 1038 | |
3f30a274 | 1039 | mangled = endptr; |
43b1b9ed | 1040 | |
3f30a274 IB |
1041 | /* May be a template instance with a length prefix. */ |
1042 | if (len >= 5 && mangled[0] == '_' && mangled[1] == '_' | |
1043 | && (mangled[2] == 'T' || mangled[2] == 'U')) | |
1044 | return dlang_parse_template (decl, mangled, info, len); | |
43b1b9ed | 1045 | |
3f30a274 IB |
1046 | return dlang_lname (decl, mangled, len); |
1047 | } | |
43b1b9ed | 1048 | |
3f30a274 IB |
1049 | /* Extract the plain identifier from MANGLED and prepend/append it to DECL |
1050 | with special treatment for some magic compiler generted symbols. | |
1051 | Return the remaining string on success or NULL on failure. */ | |
1052 | static const char * | |
fff56ce4 | 1053 | dlang_lname (string *decl, const char *mangled, unsigned long len) |
3f30a274 IB |
1054 | { |
1055 | switch (len) | |
1056 | { | |
1057 | case 6: | |
1058 | if (strncmp (mangled, "__ctor", len) == 0) | |
43b1b9ed | 1059 | { |
3f30a274 IB |
1060 | /* Constructor symbol for a class/struct. */ |
1061 | string_append (decl, "this"); | |
1062 | mangled += len; | |
1063 | return mangled; | |
1064 | } | |
1065 | else if (strncmp (mangled, "__dtor", len) == 0) | |
1066 | { | |
1067 | /* Destructor symbol for a class/struct. */ | |
1068 | string_append (decl, "~this"); | |
1069 | mangled += len; | |
1070 | return mangled; | |
1071 | } | |
1072 | else if (strncmp (mangled, "__initZ", len + 1) == 0) | |
1073 | { | |
1074 | /* The static initialiser for a given symbol. */ | |
1075 | string_prepend (decl, "initializer for "); | |
1076 | string_setlength (decl, string_length (decl) - 1); | |
1077 | mangled += len; | |
1078 | return mangled; | |
1079 | } | |
1080 | else if (strncmp (mangled, "__vtblZ", len + 1) == 0) | |
1081 | { | |
1082 | /* The vtable symbol for a given class. */ | |
1083 | string_prepend (decl, "vtable for "); | |
1084 | string_setlength (decl, string_length (decl) - 1); | |
1085 | mangled += len; | |
1086 | return mangled; | |
1087 | } | |
1088 | break; | |
5cc158e9 | 1089 | |
3f30a274 IB |
1090 | case 7: |
1091 | if (strncmp (mangled, "__ClassZ", len + 1) == 0) | |
1092 | { | |
1093 | /* The classinfo symbol for a given class. */ | |
1094 | string_prepend (decl, "ClassInfo for "); | |
1095 | string_setlength (decl, string_length (decl) - 1); | |
1096 | mangled += len; | |
1097 | return mangled; | |
1098 | } | |
1099 | break; | |
5cc158e9 | 1100 | |
3f30a274 IB |
1101 | case 10: |
1102 | if (strncmp (mangled, "__postblitMFZ", len + 3) == 0) | |
1103 | { | |
1104 | /* Postblit symbol for a struct. */ | |
1105 | string_append (decl, "this(this)"); | |
1106 | mangled += len + 3; | |
1107 | return mangled; | |
1108 | } | |
1109 | break; | |
5cc158e9 | 1110 | |
3f30a274 IB |
1111 | case 11: |
1112 | if (strncmp (mangled, "__InterfaceZ", len + 1) == 0) | |
1113 | { | |
1114 | /* The interface symbol for a given class. */ | |
1115 | string_prepend (decl, "Interface for "); | |
1116 | string_setlength (decl, string_length (decl) - 1); | |
1117 | mangled += len; | |
1118 | return mangled; | |
43b1b9ed | 1119 | } |
3f30a274 | 1120 | break; |
43b1b9ed | 1121 | |
3f30a274 IB |
1122 | case 12: |
1123 | if (strncmp (mangled, "__ModuleInfoZ", len + 1) == 0) | |
1124 | { | |
1125 | /* The ModuleInfo symbol for a given module. */ | |
1126 | string_prepend (decl, "ModuleInfo for "); | |
1127 | string_setlength (decl, string_length (decl) - 1); | |
1128 | mangled += len; | |
1129 | return mangled; | |
1130 | } | |
1131 | break; | |
43b1b9ed | 1132 | } |
43b1b9ed | 1133 | |
3f30a274 IB |
1134 | string_appendn (decl, mangled, len); |
1135 | mangled += len; | |
1136 | ||
43b1b9ed IB |
1137 | return mangled; |
1138 | } | |
1139 | ||
1140 | /* Extract the integer value from MANGLED and append it to DECL, | |
1141 | where TYPE is the type it should be represented as. | |
1142 | Return the remaining string on success or NULL on failure. */ | |
1143 | static const char * | |
1144 | dlang_parse_integer (string *decl, const char *mangled, char type) | |
1145 | { | |
1146 | if (type == 'a' || type == 'u' || type == 'w') | |
1147 | { | |
1148 | /* Parse character value. */ | |
81adfd10 B |
1149 | char value[20]; |
1150 | int pos = sizeof(value); | |
43b1b9ed | 1151 | int width = 0; |
fff56ce4 | 1152 | unsigned long val; |
43b1b9ed | 1153 | |
dbe65f77 IB |
1154 | mangled = dlang_number (mangled, &val); |
1155 | if (mangled == NULL) | |
43b1b9ed IB |
1156 | return NULL; |
1157 | ||
1158 | string_append (decl, "'"); | |
1159 | ||
1160 | if (type == 'a' && val >= 0x20 && val < 0x7F) | |
1161 | { | |
1162 | /* Represent as a character literal. */ | |
1163 | char c = (char) val; | |
1164 | string_appendn (decl, &c, 1); | |
1165 | } | |
1166 | else | |
1167 | { | |
1168 | /* Represent as a hexadecimal value. */ | |
1169 | switch (type) | |
1170 | { | |
1171 | case 'a': /* char */ | |
1172 | string_append (decl, "\\x"); | |
1173 | width = 2; | |
1174 | break; | |
1175 | case 'u': /* wchar */ | |
1176 | string_append (decl, "\\u"); | |
1177 | width = 4; | |
1178 | break; | |
1179 | case 'w': /* dchar */ | |
1180 | string_append (decl, "\\U"); | |
1181 | width = 8; | |
1182 | break; | |
1183 | } | |
1184 | ||
1185 | while (val > 0) | |
1186 | { | |
1187 | int digit = val % 16; | |
1188 | ||
1189 | if (digit < 10) | |
1190 | value[--pos] = (char)(digit + '0'); | |
1191 | else | |
1192 | value[--pos] = (char)((digit - 10) + 'a'); | |
1193 | ||
1194 | val /= 16; | |
1195 | width--; | |
1196 | } | |
1197 | ||
1198 | for (; width > 0; width--) | |
1199 | value[--pos] = '0'; | |
1200 | ||
81adfd10 | 1201 | string_appendn (decl, &(value[pos]), sizeof(value) - pos); |
43b1b9ed IB |
1202 | } |
1203 | string_append (decl, "'"); | |
43b1b9ed IB |
1204 | } |
1205 | else if (type == 'b') | |
1206 | { | |
1207 | /* Parse boolean value. */ | |
fff56ce4 | 1208 | unsigned long val; |
43b1b9ed | 1209 | |
dbe65f77 IB |
1210 | mangled = dlang_number (mangled, &val); |
1211 | if (mangled == NULL) | |
43b1b9ed IB |
1212 | return NULL; |
1213 | ||
1214 | string_append (decl, val ? "true" : "false"); | |
43b1b9ed IB |
1215 | } |
1216 | else | |
1217 | { | |
1218 | /* Parse integer value. */ | |
1219 | const char *numptr = mangled; | |
1220 | size_t num = 0; | |
1221 | ||
dbe65f77 IB |
1222 | if (! ISDIGIT (*mangled)) |
1223 | return NULL; | |
1224 | ||
43b1b9ed IB |
1225 | while (ISDIGIT (*mangled)) |
1226 | { | |
1227 | num++; | |
1228 | mangled++; | |
1229 | } | |
1230 | string_appendn (decl, numptr, num); | |
1231 | ||
1232 | /* Append suffix. */ | |
1233 | switch (type) | |
1234 | { | |
1235 | case 'h': /* ubyte */ | |
1236 | case 't': /* ushort */ | |
1237 | case 'k': /* uint */ | |
1238 | string_append (decl, "u"); | |
1239 | break; | |
1240 | case 'l': /* long */ | |
1241 | string_append (decl, "L"); | |
1242 | break; | |
1243 | case 'm': /* ulong */ | |
1244 | string_append (decl, "uL"); | |
1245 | break; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | return mangled; | |
1250 | } | |
1251 | ||
1252 | /* Extract the floating-point value from MANGLED and append it to DECL. | |
1253 | Return the remaining string on success or NULL on failure. */ | |
1254 | static const char * | |
1255 | dlang_parse_real (string *decl, const char *mangled) | |
1256 | { | |
43b1b9ed IB |
1257 | /* Handle NAN and +-INF. */ |
1258 | if (strncmp (mangled, "NAN", 3) == 0) | |
1259 | { | |
1260 | string_append (decl, "NaN"); | |
1261 | mangled += 3; | |
1262 | return mangled; | |
1263 | } | |
1264 | else if (strncmp (mangled, "INF", 3) == 0) | |
1265 | { | |
1266 | string_append (decl, "Inf"); | |
1267 | mangled += 3; | |
1268 | return mangled; | |
1269 | } | |
1270 | else if (strncmp (mangled, "NINF", 4) == 0) | |
1271 | { | |
1272 | string_append (decl, "-Inf"); | |
1273 | mangled += 4; | |
1274 | return mangled; | |
1275 | } | |
1276 | ||
1277 | /* Hexadecimal prefix and leading bit. */ | |
1278 | if (*mangled == 'N') | |
1279 | { | |
1a122a71 | 1280 | string_append (decl, "-"); |
43b1b9ed IB |
1281 | mangled++; |
1282 | } | |
1283 | ||
1284 | if (!ISXDIGIT (*mangled)) | |
1285 | return NULL; | |
1286 | ||
1a122a71 IB |
1287 | string_append (decl, "0x"); |
1288 | string_appendn (decl, mangled, 1); | |
1289 | string_append (decl, "."); | |
43b1b9ed IB |
1290 | mangled++; |
1291 | ||
1292 | /* Significand. */ | |
1293 | while (ISXDIGIT (*mangled)) | |
1294 | { | |
1a122a71 | 1295 | string_appendn (decl, mangled, 1); |
43b1b9ed IB |
1296 | mangled++; |
1297 | } | |
1298 | ||
1299 | /* Exponent. */ | |
1300 | if (*mangled != 'P') | |
1301 | return NULL; | |
1302 | ||
1a122a71 | 1303 | string_append (decl, "p"); |
43b1b9ed IB |
1304 | mangled++; |
1305 | ||
1306 | if (*mangled == 'N') | |
1307 | { | |
1a122a71 | 1308 | string_append (decl, "-"); |
43b1b9ed IB |
1309 | mangled++; |
1310 | } | |
1311 | ||
1312 | while (ISDIGIT (*mangled)) | |
1313 | { | |
1a122a71 | 1314 | string_appendn (decl, mangled, 1); |
43b1b9ed IB |
1315 | mangled++; |
1316 | } | |
1317 | ||
43b1b9ed IB |
1318 | return mangled; |
1319 | } | |
1320 | ||
43b1b9ed IB |
1321 | /* Extract the string value from MANGLED and append it to DECL. |
1322 | Return the remaining string on success or NULL on failure. */ | |
1323 | static const char * | |
1324 | dlang_parse_string (string *decl, const char *mangled) | |
1325 | { | |
1326 | char type = *mangled; | |
fff56ce4 | 1327 | unsigned long len; |
43b1b9ed IB |
1328 | |
1329 | mangled++; | |
dbe65f77 IB |
1330 | mangled = dlang_number (mangled, &len); |
1331 | if (mangled == NULL || *mangled != '_') | |
43b1b9ed IB |
1332 | return NULL; |
1333 | ||
1334 | mangled++; | |
1335 | string_append (decl, "\""); | |
1336 | while (len--) | |
1337 | { | |
5398cab9 IB |
1338 | char val; |
1339 | const char *endptr = dlang_hexdigit (mangled, &val); | |
1340 | ||
1341 | if (endptr == NULL) | |
1342 | return NULL; | |
1343 | ||
1344 | /* Sanitize white and non-printable characters. */ | |
1345 | switch (val) | |
43b1b9ed | 1346 | { |
5398cab9 IB |
1347 | case ' ': |
1348 | string_append (decl, " "); | |
1349 | break; | |
1350 | case '\t': | |
1351 | string_append (decl, "\\t"); | |
1352 | break; | |
1353 | case '\n': | |
1354 | string_append (decl, "\\n"); | |
1355 | break; | |
1356 | case '\r': | |
1357 | string_append (decl, "\\r"); | |
1358 | break; | |
1359 | case '\f': | |
1360 | string_append (decl, "\\f"); | |
1361 | break; | |
1362 | case '\v': | |
1363 | string_append (decl, "\\v"); | |
1364 | break; | |
eb058b7d | 1365 | |
5398cab9 IB |
1366 | default: |
1367 | if (ISPRINT (val)) | |
1368 | string_appendn (decl, &val, 1); | |
1369 | else | |
eb058b7d | 1370 | { |
5398cab9 IB |
1371 | string_append (decl, "\\x"); |
1372 | string_appendn (decl, mangled, 2); | |
eb058b7d | 1373 | } |
43b1b9ed | 1374 | } |
43b1b9ed | 1375 | |
5398cab9 | 1376 | mangled = endptr; |
43b1b9ed IB |
1377 | } |
1378 | string_append (decl, "\""); | |
1379 | ||
1380 | if (type != 'a') | |
1381 | string_appendn (decl, &type, 1); | |
1382 | ||
1383 | return mangled; | |
1384 | } | |
1385 | ||
1386 | /* Extract the static array value from MANGLED and append it to DECL. | |
1387 | Return the remaining string on success or NULL on failure. */ | |
1388 | static const char * | |
1389 | dlang_parse_arrayliteral (string *decl, const char *mangled) | |
1390 | { | |
fff56ce4 | 1391 | unsigned long elements; |
43b1b9ed | 1392 | |
dbe65f77 IB |
1393 | mangled = dlang_number (mangled, &elements); |
1394 | if (mangled == NULL) | |
43b1b9ed IB |
1395 | return NULL; |
1396 | ||
43b1b9ed IB |
1397 | string_append (decl, "["); |
1398 | while (elements--) | |
1399 | { | |
1400 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
80b1ab15 B |
1401 | if (mangled == NULL) |
1402 | return NULL; | |
1403 | ||
43b1b9ed IB |
1404 | if (elements != 0) |
1405 | string_append (decl, ", "); | |
1406 | } | |
1407 | ||
1408 | string_append (decl, "]"); | |
1409 | return mangled; | |
1410 | } | |
1411 | ||
1412 | /* Extract the associative array value from MANGLED and append it to DECL. | |
1413 | Return the remaining string on success or NULL on failure. */ | |
1414 | static const char * | |
1415 | dlang_parse_assocarray (string *decl, const char *mangled) | |
1416 | { | |
fff56ce4 | 1417 | unsigned long elements; |
43b1b9ed | 1418 | |
dbe65f77 IB |
1419 | mangled = dlang_number (mangled, &elements); |
1420 | if (mangled == NULL) | |
43b1b9ed IB |
1421 | return NULL; |
1422 | ||
43b1b9ed IB |
1423 | string_append (decl, "["); |
1424 | while (elements--) | |
1425 | { | |
1426 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
6c8dbbfe B |
1427 | if (mangled == NULL) |
1428 | return NULL; | |
1429 | ||
43b1b9ed IB |
1430 | string_append (decl, ":"); |
1431 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
6c8dbbfe B |
1432 | if (mangled == NULL) |
1433 | return NULL; | |
43b1b9ed IB |
1434 | |
1435 | if (elements != 0) | |
1436 | string_append (decl, ", "); | |
1437 | } | |
1438 | ||
1439 | string_append (decl, "]"); | |
1440 | return mangled; | |
1441 | } | |
1442 | ||
1443 | /* Extract the struct literal value for NAME from MANGLED and append it to DECL. | |
1444 | Return the remaining string on success or NULL on failure. */ | |
1445 | static const char * | |
1446 | dlang_parse_structlit (string *decl, const char *mangled, const char *name) | |
1447 | { | |
fff56ce4 | 1448 | unsigned long args; |
43b1b9ed | 1449 | |
dbe65f77 IB |
1450 | mangled = dlang_number (mangled, &args); |
1451 | if (mangled == NULL) | |
43b1b9ed IB |
1452 | return NULL; |
1453 | ||
43b1b9ed IB |
1454 | if (name != NULL) |
1455 | string_append (decl, name); | |
1456 | ||
1457 | string_append (decl, "("); | |
1458 | while (args--) | |
1459 | { | |
1460 | mangled = dlang_value (decl, mangled, NULL, '\0'); | |
dba20a51 B |
1461 | if (mangled == NULL) |
1462 | return NULL; | |
1463 | ||
43b1b9ed IB |
1464 | if (args != 0) |
1465 | string_append (decl, ", "); | |
1466 | } | |
1467 | ||
1468 | string_append (decl, ")"); | |
1469 | return mangled; | |
1470 | } | |
1471 | ||
1472 | /* Extract the value from MANGLED and append it to DECL. | |
1473 | Return the remaining string on success or NULL on failure. */ | |
1474 | static const char * | |
1475 | dlang_value (string *decl, const char *mangled, const char *name, char type) | |
1476 | { | |
1477 | if (mangled == NULL || *mangled == '\0') | |
76b41cad | 1478 | return NULL; |
43b1b9ed IB |
1479 | |
1480 | switch (*mangled) | |
1481 | { | |
1482 | /* Null value. */ | |
1483 | case 'n': | |
1484 | mangled++; | |
1485 | string_append (decl, "null"); | |
1486 | break; | |
1487 | ||
1488 | /* Integral values. */ | |
1489 | case 'N': | |
1490 | mangled++; | |
1491 | string_append (decl, "-"); | |
1492 | mangled = dlang_parse_integer (decl, mangled, type); | |
1493 | break; | |
1494 | ||
1495 | case 'i': | |
1496 | mangled++; | |
43b1b9ed | 1497 | /* Fall through */ |
dd03444b IB |
1498 | |
1499 | /* There really should always be an `i' before encoded numbers, but there | |
1500 | wasn't in early versions of D2, so this case range must remain for | |
1501 | backwards compatibility. */ | |
43b1b9ed IB |
1502 | case '0': case '1': case '2': case '3': case '4': |
1503 | case '5': case '6': case '7': case '8': case '9': | |
1504 | mangled = dlang_parse_integer (decl, mangled, type); | |
1505 | break; | |
1506 | ||
1507 | /* Real value. */ | |
1508 | case 'e': | |
1509 | mangled++; | |
1510 | mangled = dlang_parse_real (decl, mangled); | |
1511 | break; | |
1512 | ||
1513 | /* Complex value. */ | |
1514 | case 'c': | |
1515 | mangled++; | |
1516 | mangled = dlang_parse_real (decl, mangled); | |
1517 | string_append (decl, "+"); | |
1518 | if (mangled == NULL || *mangled != 'c') | |
1519 | return NULL; | |
1520 | mangled++; | |
1521 | mangled = dlang_parse_real (decl, mangled); | |
1522 | string_append (decl, "i"); | |
1523 | break; | |
1524 | ||
1525 | /* String values. */ | |
1526 | case 'a': /* UTF8 */ | |
1527 | case 'w': /* UTF16 */ | |
1528 | case 'd': /* UTF32 */ | |
1529 | mangled = dlang_parse_string (decl, mangled); | |
1530 | break; | |
1531 | ||
1532 | /* Array values. */ | |
1533 | case 'A': | |
1534 | mangled++; | |
1535 | if (type == 'H') | |
1536 | mangled = dlang_parse_assocarray (decl, mangled); | |
1537 | else | |
1538 | mangled = dlang_parse_arrayliteral (decl, mangled); | |
1539 | break; | |
1540 | ||
1541 | /* Struct values. */ | |
1542 | case 'S': | |
1543 | mangled++; | |
1544 | mangled = dlang_parse_structlit (decl, mangled, name); | |
1545 | break; | |
1546 | ||
1547 | default: | |
1548 | return NULL; | |
1549 | } | |
1550 | ||
1551 | return mangled; | |
1552 | } | |
1553 | ||
43b1b9ed IB |
1554 | /* Extract and demangle the symbol in MANGLED and append it to DECL. |
1555 | Returns the remaining signature on success or NULL on failure. */ | |
1556 | static const char * | |
3f30a274 | 1557 | dlang_parse_mangle (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed | 1558 | { |
5a4dbf7d IB |
1559 | /* A D mangled symbol is comprised of both scope and type information. |
1560 | ||
1561 | MangleName: | |
1562 | _D QualifiedName Type | |
5a4dbf7d IB |
1563 | _D QualifiedName Z |
1564 | ^ | |
1565 | The caller should have guaranteed that the start pointer is at the | |
1566 | above location. | |
3f30a274 IB |
1567 | Note that type is never a function type, but only the return type of |
1568 | a function or the type of a variable. | |
5a4dbf7d IB |
1569 | */ |
1570 | mangled += 2; | |
1571 | ||
3f30a274 | 1572 | mangled = dlang_parse_qualified (decl, mangled, info, 1); |
5a4dbf7d IB |
1573 | |
1574 | if (mangled != NULL) | |
1575 | { | |
1576 | /* Artificial symbols end with 'Z' and have no type. */ | |
1577 | if (*mangled == 'Z') | |
1578 | mangled++; | |
1579 | else | |
1580 | { | |
3f30a274 IB |
1581 | /* Discard the declaration or return type. */ |
1582 | string type; | |
5a4dbf7d | 1583 | |
3f30a274 IB |
1584 | string_init (&type); |
1585 | mangled = dlang_type (&type, mangled, info); | |
1586 | string_delete (&type); | |
5a4dbf7d IB |
1587 | } |
1588 | } | |
1589 | ||
5a4dbf7d IB |
1590 | return mangled; |
1591 | } | |
1592 | ||
1593 | /* Extract and demangle the qualified symbol in MANGLED and append it to DECL. | |
3f30a274 | 1594 | SUFFIX_MODIFIERS is 1 if we are printing modifiers on this after the symbol. |
5a4dbf7d IB |
1595 | Returns the remaining signature on success or NULL on failure. */ |
1596 | static const char * | |
1597 | dlang_parse_qualified (string *decl, const char *mangled, | |
3f30a274 | 1598 | struct dlang_info *info, int suffix_modifiers) |
5a4dbf7d IB |
1599 | { |
1600 | /* Qualified names are identifiers separated by their encoded length. | |
1601 | Nested functions also encode their argument types without specifying | |
1602 | what they return. | |
1603 | ||
1604 | QualifiedName: | |
3f30a274 IB |
1605 | SymbolFunctionName |
1606 | SymbolFunctionName QualifiedName | |
5a4dbf7d | 1607 | ^ |
3f30a274 IB |
1608 | |
1609 | SymbolFunctionName: | |
1610 | SymbolName | |
1611 | SymbolName TypeFunctionNoReturn | |
1612 | SymbolName M TypeFunctionNoReturn | |
1613 | SymbolName M TypeModifiers TypeFunctionNoReturn | |
1614 | ||
5a4dbf7d IB |
1615 | The start pointer should be at the above location. |
1616 | */ | |
43b1b9ed IB |
1617 | size_t n = 0; |
1618 | do | |
1619 | { | |
1620 | if (n++) | |
1621 | string_append (decl, "."); | |
1622 | ||
98bb7ee2 IB |
1623 | /* Skip over anonymous symbols. */ |
1624 | while (*mangled == '0') | |
1625 | mangled++; | |
1626 | ||
3f30a274 | 1627 | mangled = dlang_identifier (decl, mangled, info); |
43b1b9ed | 1628 | |
5a4dbf7d | 1629 | /* Consume the encoded arguments. However if this is not followed by the |
3f30a274 IB |
1630 | next encoded length or mangle type, then this is not a continuation of |
1631 | a qualified name, in which case we backtrack and return the current | |
1632 | unconsumed position of the mangled decl. */ | |
5a4dbf7d | 1633 | if (mangled && (*mangled == 'M' || dlang_call_convention_p (mangled))) |
43b1b9ed | 1634 | { |
3f30a274 | 1635 | string mods; |
5a4dbf7d IB |
1636 | const char *start = mangled; |
1637 | int saved = string_length (decl); | |
43b1b9ed | 1638 | |
3f30a274 IB |
1639 | /* Save the type modifiers for appending at the end if needed. */ |
1640 | string_init (&mods); | |
1641 | ||
5a4dbf7d | 1642 | /* Skip over 'this' parameter and type modifiers. */ |
43b1b9ed | 1643 | if (*mangled == 'M') |
7e865541 | 1644 | { |
5a4dbf7d | 1645 | mangled++; |
3f30a274 | 1646 | mangled = dlang_type_modifiers (&mods, mangled); |
5a4dbf7d | 1647 | string_setlength (decl, saved); |
7e865541 IB |
1648 | } |
1649 | ||
3f30a274 IB |
1650 | mangled = dlang_function_type_noreturn (decl, NULL, NULL, |
1651 | mangled, info); | |
1652 | if (suffix_modifiers) | |
1653 | string_appendn (decl, mods.b, string_length (&mods)); | |
43b1b9ed | 1654 | |
3f30a274 | 1655 | if (mangled == NULL || *mangled == '\0') |
7e865541 | 1656 | { |
5a4dbf7d | 1657 | /* Did not match the rule we were looking for. */ |
7e865541 | 1658 | mangled = start; |
5a4dbf7d | 1659 | string_setlength (decl, saved); |
7e865541 | 1660 | } |
3f30a274 IB |
1661 | |
1662 | string_delete (&mods); | |
43b1b9ed IB |
1663 | } |
1664 | } | |
3f30a274 | 1665 | while (mangled && dlang_symbol_name_p (mangled, info)); |
43b1b9ed IB |
1666 | |
1667 | return mangled; | |
1668 | } | |
1669 | ||
1670 | /* Demangle the tuple from MANGLED and append it to DECL. | |
1671 | Return the remaining string on success or NULL on failure. */ | |
1672 | static const char * | |
3f30a274 | 1673 | dlang_parse_tuple (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed | 1674 | { |
fff56ce4 | 1675 | unsigned long elements; |
43b1b9ed | 1676 | |
dbe65f77 IB |
1677 | mangled = dlang_number (mangled, &elements); |
1678 | if (mangled == NULL) | |
43b1b9ed IB |
1679 | return NULL; |
1680 | ||
43b1b9ed IB |
1681 | string_append (decl, "Tuple!("); |
1682 | ||
1683 | while (elements--) | |
1684 | { | |
3f30a274 | 1685 | mangled = dlang_type (decl, mangled, info); |
f181b8e7 B |
1686 | if (mangled == NULL) |
1687 | return NULL; | |
1688 | ||
43b1b9ed IB |
1689 | if (elements != 0) |
1690 | string_append (decl, ", "); | |
1691 | } | |
1692 | ||
1693 | string_append (decl, ")"); | |
1694 | return mangled; | |
1695 | } | |
1696 | ||
3f30a274 IB |
1697 | /* Demangle the template symbol parameter from MANGLED and append it to DECL. |
1698 | Return the remaining string on success or NULL on failure. */ | |
1699 | static const char * | |
1700 | dlang_template_symbol_param (string *decl, const char *mangled, | |
1701 | struct dlang_info *info) | |
1702 | { | |
1703 | if (strncmp (mangled, "_D", 2) == 0 | |
1704 | && dlang_symbol_name_p (mangled + 2, info)) | |
1705 | return dlang_parse_mangle (decl, mangled, info); | |
1706 | ||
1707 | if (*mangled == 'Q') | |
1708 | return dlang_parse_qualified (decl, mangled, info, 0); | |
1709 | ||
fff56ce4 | 1710 | unsigned long len; |
3f30a274 IB |
1711 | const char *endptr = dlang_number (mangled, &len); |
1712 | ||
1713 | if (endptr == NULL || len == 0) | |
1714 | return NULL; | |
1715 | ||
1716 | /* In template parameter symbols generated by the frontend up to 2.076, | |
1717 | the symbol length is encoded and the first character of the mangled | |
1718 | name can be a digit. This causes ambiguity issues because the digits | |
1719 | of the two numbers are adjacent. */ | |
1720 | long psize = len; | |
1721 | const char *pend; | |
1722 | int saved = string_length (decl); | |
1723 | ||
1724 | /* Work backwards until a match is found. */ | |
1725 | for (pend = endptr; endptr != NULL; pend--) | |
1726 | { | |
1727 | mangled = pend; | |
1728 | ||
1729 | /* Reached the beginning of the pointer to the name length, | |
1730 | try parsing the entire symbol. */ | |
1731 | if (psize == 0) | |
1732 | { | |
1733 | psize = len; | |
1734 | pend = endptr; | |
1735 | endptr = NULL; | |
1736 | } | |
1737 | ||
1738 | /* Check whether template parameter is a function with a valid | |
1739 | return type or an untyped identifier. */ | |
1740 | if (dlang_symbol_name_p (mangled, info)) | |
1741 | mangled = dlang_parse_qualified (decl, mangled, info, 0); | |
1742 | else if (strncmp (mangled, "_D", 2) == 0 | |
1743 | && dlang_symbol_name_p (mangled + 2, info)) | |
1744 | mangled = dlang_parse_mangle (decl, mangled, info); | |
1745 | ||
1746 | /* Check for name length mismatch. */ | |
1747 | if (mangled && (endptr == NULL || (mangled - pend) == psize)) | |
1748 | return mangled; | |
1749 | ||
1750 | psize /= 10; | |
1751 | string_setlength (decl, saved); | |
1752 | } | |
1753 | ||
1754 | /* No match on any combinations. */ | |
1755 | return NULL; | |
1756 | } | |
1757 | ||
43b1b9ed IB |
1758 | /* Demangle the argument list from MANGLED and append it to DECL. |
1759 | Return the remaining string on success or NULL on failure. */ | |
1760 | static const char * | |
3f30a274 | 1761 | dlang_template_args (string *decl, const char *mangled, struct dlang_info *info) |
43b1b9ed IB |
1762 | { |
1763 | size_t n = 0; | |
1764 | ||
1765 | while (mangled && *mangled != '\0') | |
1766 | { | |
1767 | switch (*mangled) | |
1768 | { | |
1769 | case 'Z': /* End of parameter list. */ | |
1770 | mangled++; | |
1771 | return mangled; | |
1772 | } | |
1773 | ||
1774 | if (n++) | |
1775 | string_append (decl, ", "); | |
1776 | ||
ed4cdb85 IB |
1777 | /* Skip over specialised template prefix. */ |
1778 | if (*mangled == 'H') | |
1779 | mangled++; | |
1780 | ||
43b1b9ed IB |
1781 | switch (*mangled) |
1782 | { | |
1783 | case 'S': /* Symbol parameter. */ | |
1784 | mangled++; | |
3f30a274 | 1785 | mangled = dlang_template_symbol_param (decl, mangled, info); |
43b1b9ed IB |
1786 | break; |
1787 | case 'T': /* Type parameter. */ | |
1788 | mangled++; | |
3f30a274 | 1789 | mangled = dlang_type (decl, mangled, info); |
43b1b9ed IB |
1790 | break; |
1791 | case 'V': /* Value parameter. */ | |
1792 | { | |
1793 | string name; | |
1794 | char type; | |
1795 | ||
1796 | /* Peek at the type. */ | |
1797 | mangled++; | |
1798 | type = *mangled; | |
1799 | ||
3f30a274 IB |
1800 | if (type == 'Q') |
1801 | { | |
1802 | /* Value type is a back reference, peek at the real type. */ | |
1803 | const char *backref; | |
1804 | if (dlang_backref (mangled, &backref, info) == NULL) | |
1805 | return NULL; | |
1806 | ||
1807 | type = *backref; | |
1808 | } | |
1809 | ||
43b1b9ed IB |
1810 | /* In the few instances where the type is actually desired in |
1811 | the output, it should precede the value from dlang_value. */ | |
1812 | string_init (&name); | |
3f30a274 | 1813 | mangled = dlang_type (&name, mangled, info); |
43b1b9ed IB |
1814 | string_need (&name, 1); |
1815 | *(name.p) = '\0'; | |
1816 | ||
1817 | mangled = dlang_value (decl, mangled, name.b, type); | |
1818 | string_delete (&name); | |
1819 | break; | |
1820 | } | |
3f30a274 IB |
1821 | case 'X': /* Externally mangled parameter. */ |
1822 | { | |
fff56ce4 | 1823 | unsigned long len; |
3f30a274 | 1824 | const char *endptr; |
43b1b9ed | 1825 | |
3f30a274 IB |
1826 | mangled++; |
1827 | endptr = dlang_number (mangled, &len); | |
fff56ce4 | 1828 | if (endptr == NULL || strlen (endptr) < len) |
3f30a274 IB |
1829 | return NULL; |
1830 | ||
1831 | string_appendn (decl, endptr, len); | |
1832 | mangled = endptr + len; | |
1833 | break; | |
1834 | } | |
43b1b9ed IB |
1835 | default: |
1836 | return NULL; | |
1837 | } | |
1838 | } | |
1839 | ||
1840 | return mangled; | |
1841 | } | |
1842 | ||
1843 | /* Extract and demangle the template symbol in MANGLED, expected to | |
3f30a274 | 1844 | be made up of LEN characters (-1 if unknown), and append it to DECL. |
43b1b9ed IB |
1845 | Returns the remaining signature on success or NULL on failure. */ |
1846 | static const char * | |
3f30a274 | 1847 | dlang_parse_template (string *decl, const char *mangled, |
fff56ce4 | 1848 | struct dlang_info *info, unsigned long len) |
43b1b9ed IB |
1849 | { |
1850 | const char *start = mangled; | |
3f30a274 | 1851 | string args; |
43b1b9ed IB |
1852 | |
1853 | /* Template instance names have the types and values of its parameters | |
1854 | encoded into it. | |
1855 | ||
1856 | TemplateInstanceName: | |
1857 | Number __T LName TemplateArgs Z | |
c6f44bae | 1858 | Number __U LName TemplateArgs Z |
43b1b9ed IB |
1859 | ^ |
1860 | The start pointer should be at the above location, and LEN should be | |
1861 | the value of the decoded number. | |
1862 | */ | |
c6f44bae IB |
1863 | |
1864 | /* Template symbol. */ | |
3f30a274 | 1865 | if (!dlang_symbol_name_p (mangled + 3, info) || mangled[3] == '0') |
43b1b9ed IB |
1866 | return NULL; |
1867 | ||
1868 | mangled += 3; | |
1869 | ||
1870 | /* Template identifier. */ | |
3f30a274 | 1871 | mangled = dlang_identifier (decl, mangled, info); |
43b1b9ed IB |
1872 | |
1873 | /* Template arguments. */ | |
3f30a274 IB |
1874 | string_init (&args); |
1875 | mangled = dlang_template_args (&args, mangled, info); | |
1876 | ||
43b1b9ed | 1877 | string_append (decl, "!("); |
3f30a274 | 1878 | string_appendn (decl, args.b, string_length (&args)); |
43b1b9ed IB |
1879 | string_append (decl, ")"); |
1880 | ||
3f30a274 IB |
1881 | string_delete (&args); |
1882 | ||
43b1b9ed | 1883 | /* Check for template name length mismatch. */ |
fff56ce4 AM |
1884 | if (len != TEMPLATE_LENGTH_UNKNOWN |
1885 | && mangled | |
1886 | && (unsigned long) (mangled - start) != len) | |
43b1b9ed IB |
1887 | return NULL; |
1888 | ||
1889 | return mangled; | |
1890 | } | |
1891 | ||
3f30a274 IB |
1892 | /* Initialize the information structure we use to pass around information. */ |
1893 | static void | |
1894 | dlang_demangle_init_info (const char *mangled, int last_backref, | |
1895 | struct dlang_info *info) | |
1896 | { | |
1897 | info->s = mangled; | |
1898 | info->last_backref = last_backref; | |
1899 | } | |
1900 | ||
43b1b9ed IB |
1901 | /* Extract and demangle the symbol in MANGLED. Returns the demangled |
1902 | signature on success or NULL on failure. */ | |
1903 | ||
1904 | char * | |
1905 | dlang_demangle (const char *mangled, int option ATTRIBUTE_UNUSED) | |
1906 | { | |
1907 | string decl; | |
1908 | char *demangled = NULL; | |
1909 | ||
1910 | if (mangled == NULL || *mangled == '\0') | |
1911 | return NULL; | |
1912 | ||
1913 | if (strncmp (mangled, "_D", 2) != 0) | |
1914 | return NULL; | |
1915 | ||
1916 | string_init (&decl); | |
1917 | ||
1918 | if (strcmp (mangled, "_Dmain") == 0) | |
1919 | { | |
1920 | string_append (&decl, "D main"); | |
1921 | } | |
1922 | else | |
1923 | { | |
3f30a274 IB |
1924 | struct dlang_info info; |
1925 | ||
1926 | dlang_demangle_init_info (mangled, strlen (mangled), &info); | |
1927 | mangled = dlang_parse_mangle (&decl, mangled, &info); | |
1928 | ||
1929 | /* Check that the entire symbol was successfully demangled. */ | |
1930 | if (mangled == NULL || *mangled != '\0') | |
43b1b9ed IB |
1931 | string_delete (&decl); |
1932 | } | |
1933 | ||
1934 | if (string_length (&decl) > 0) | |
1935 | { | |
1936 | string_need (&decl, 1); | |
1937 | *(decl.p) = '\0'; | |
1938 | demangled = decl.b; | |
1939 | } | |
1940 | ||
1941 | return demangled; | |
1942 | } | |
1943 |