source: Daodan/MSYS2/mingw32/include/libiberty/demangle.h@ 1167

Last change on this file since 1167 was 1166, checked in by rossy, 3 years ago

Daodan: Replace MinGW build env with an up-to-date MSYS2 env
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1/* Defs for interface to demanglers.
2 Copyright (C) 1992-2021 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License
6 as published by the Free Software Foundation; either version 2, or
7 (at your option) any later version.
8
9 In addition to the permissions in the GNU Library General Public
10 License, the Free Software Foundation gives you unlimited
11 permission to link the compiled version of this file into
12 combinations with other programs, and to distribute those
13 combinations without any restriction coming from the use of this
14 file. (The Library Public License restrictions do apply in other
15 respects; for example, they cover modification of the file, and
16 distribution when not linked into a combined executable.)
17
18 This program is distributed in the hope that it will be useful, but
19 WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 Library General Public License for more details.
22
23 You should have received a copy of the GNU Library General Public
24 License along with this program; if not, write to the Free Software
25 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
26 02110-1301, USA. */
27
28
29#if !defined (DEMANGLE_H)
30#define DEMANGLE_H
31
32#include "libiberty.h"
33
34#ifdef __cplusplus
35extern "C" {
36#endif /* __cplusplus */
37
38/* Options passed to cplus_demangle (in 2nd parameter). */
39
40#define DMGL_NO_OPTS 0 /* For readability... */
41#define DMGL_PARAMS (1 << 0) /* Include function args */
42#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
43#define DMGL_JAVA (1 << 2) /* Demangle as Java rather than C++. */
44#define DMGL_VERBOSE (1 << 3) /* Include implementation details. */
45#define DMGL_TYPES (1 << 4) /* Also try to demangle type encodings. */
46#define DMGL_RET_POSTFIX (1 << 5) /* Print function return types (when
47 present) after function signature.
48 It applies only to the toplevel
49 function type. */
50#define DMGL_RET_DROP (1 << 6) /* Suppress printing function return
51 types, even if present. It applies
52 only to the toplevel function type.
53 */
54
55#define DMGL_AUTO (1 << 8)
56#define DMGL_GNU_V3 (1 << 14)
57#define DMGL_GNAT (1 << 15)
58#define DMGL_DLANG (1 << 16)
59#define DMGL_RUST (1 << 17) /* Rust wraps GNU_V3 style mangling. */
60
61/* If none of these are set, use 'current_demangling_style' as the default. */
62#define DMGL_STYLE_MASK (DMGL_AUTO|DMGL_GNU_V3|DMGL_JAVA|DMGL_GNAT|DMGL_DLANG|DMGL_RUST)
63
64/* Disable a limit on the depth of recursion in mangled strings.
65 Note if this limit is disabled then stack exhaustion is possible when
66 demangling pathologically complicated strings. Bug reports about stack
67 exhaustion when the option is enabled will be rejected. */
68#define DMGL_NO_RECURSE_LIMIT (1 << 18)
69
70/* If DMGL_NO_RECURSE_LIMIT is not enabled, then this is the value used as
71 the maximum depth of recursion allowed. It should be enough for any
72 real-world mangled name. */
73#define DEMANGLE_RECURSION_LIMIT 2048
74
75/* Enumeration of possible demangling styles.
76
77 Lucid and ARM styles are still kept logically distinct, even though
78 they now both behave identically. The resulting style is actual the
79 union of both. I.E. either style recognizes both "__pt__" and "__rf__"
80 for operator "->", even though the first is lucid style and the second
81 is ARM style. (FIXME?) */
82
83extern enum demangling_styles
84{
85 no_demangling = -1,
86 unknown_demangling = 0,
87 auto_demangling = DMGL_AUTO,
88 gnu_v3_demangling = DMGL_GNU_V3,
89 java_demangling = DMGL_JAVA,
90 gnat_demangling = DMGL_GNAT,
91 dlang_demangling = DMGL_DLANG,
92 rust_demangling = DMGL_RUST
93} current_demangling_style;
94
95/* Define string names for the various demangling styles. */
96
97#define NO_DEMANGLING_STYLE_STRING "none"
98#define AUTO_DEMANGLING_STYLE_STRING "auto"
99#define GNU_V3_DEMANGLING_STYLE_STRING "gnu-v3"
100#define JAVA_DEMANGLING_STYLE_STRING "java"
101#define GNAT_DEMANGLING_STYLE_STRING "gnat"
102#define DLANG_DEMANGLING_STYLE_STRING "dlang"
103#define RUST_DEMANGLING_STYLE_STRING "rust"
104
105/* Some macros to test what demangling style is active. */
106
107#define CURRENT_DEMANGLING_STYLE current_demangling_style
108#define AUTO_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_AUTO)
109#define GNU_V3_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNU_V3)
110#define JAVA_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_JAVA)
111#define GNAT_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNAT)
112#define DLANG_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_DLANG)
113#define RUST_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_RUST)
114
115/* Provide information about the available demangle styles. This code is
116 pulled from gdb into libiberty because it is useful to binutils also. */
117
118extern const struct demangler_engine
119{
120 const char *const demangling_style_name;
121 const enum demangling_styles demangling_style;
122 const char *const demangling_style_doc;
123} libiberty_demanglers[];
124
125extern char *
126cplus_demangle (const char *mangled, int options);
127
128/* Note: This sets global state. FIXME if you care about multi-threading. */
129
130extern enum demangling_styles
131cplus_demangle_set_style (enum demangling_styles style);
132
133extern enum demangling_styles
134cplus_demangle_name_to_style (const char *name);
135
136/* Callback typedef for allocation-less demangler interfaces. */
137typedef void (*demangle_callbackref) (const char *, size_t, void *);
138
139/* V3 ABI demangling entry points, defined in cp-demangle.c. Callback
140 variants return non-zero on success, zero on error. char* variants
141 return a string allocated by malloc on success, NULL on error. */
142extern int
143cplus_demangle_v3_callback (const char *mangled, int options,
144 demangle_callbackref callback, void *opaque);
145
146extern char*
147cplus_demangle_v3 (const char *mangled, int options);
148
149extern int
150java_demangle_v3_callback (const char *mangled,
151 demangle_callbackref callback, void *opaque);
152
153extern char*
154java_demangle_v3 (const char *mangled);
155
156char *
157ada_demangle (const char *mangled, int options);
158
159extern char *
160dlang_demangle (const char *mangled, int options);
161
162extern int
163rust_demangle_callback (const char *mangled, int options,
164 demangle_callbackref callback, void *opaque);
165
166
167extern char *
168rust_demangle (const char *mangled, int options);
169
170enum gnu_v3_ctor_kinds {
171 gnu_v3_complete_object_ctor = 1,
172 gnu_v3_base_object_ctor,
173 gnu_v3_complete_object_allocating_ctor,
174 /* These are not part of the V3 ABI. Unified constructors are generated
175 as a speed-for-space optimization when the -fdeclone-ctor-dtor option
176 is used, and are always internal symbols. */
177 gnu_v3_unified_ctor,
178 gnu_v3_object_ctor_group
179};
180
181/* Return non-zero iff NAME is the mangled form of a constructor name
182 in the G++ V3 ABI demangling style. Specifically, return an `enum
183 gnu_v3_ctor_kinds' value indicating what kind of constructor
184 it is. */
185extern enum gnu_v3_ctor_kinds
186 is_gnu_v3_mangled_ctor (const char *name);
187
188
189enum gnu_v3_dtor_kinds {
190 gnu_v3_deleting_dtor = 1,
191 gnu_v3_complete_object_dtor,
192 gnu_v3_base_object_dtor,
193 /* These are not part of the V3 ABI. Unified destructors are generated
194 as a speed-for-space optimization when the -fdeclone-ctor-dtor option
195 is used, and are always internal symbols. */
196 gnu_v3_unified_dtor,
197 gnu_v3_object_dtor_group
198};
199
200/* Return non-zero iff NAME is the mangled form of a destructor name
201 in the G++ V3 ABI demangling style. Specifically, return an `enum
202 gnu_v3_dtor_kinds' value, indicating what kind of destructor
203 it is. */
204extern enum gnu_v3_dtor_kinds
205 is_gnu_v3_mangled_dtor (const char *name);
206
207/* The V3 demangler works in two passes. The first pass builds a tree
208 representation of the mangled name, and the second pass turns the
209 tree representation into a demangled string. Here we define an
210 interface to permit a caller to build their own tree
211 representation, which they can pass to the demangler to get a
212 demangled string. This can be used to canonicalize user input into
213 something which the demangler might output. It could also be used
214 by other demanglers in the future. */
215
216/* These are the component types which may be found in the tree. Many
217 component types have one or two subtrees, referred to as left and
218 right (a component type with only one subtree puts it in the left
219 subtree). */
220
221enum demangle_component_type
222{
223 /* A name, with a length and a pointer to a string. */
224 DEMANGLE_COMPONENT_NAME,
225 /* A qualified name. The left subtree is a class or namespace or
226 some such thing, and the right subtree is a name qualified by
227 that class. */
228 DEMANGLE_COMPONENT_QUAL_NAME,
229 /* A local name. The left subtree describes a function, and the
230 right subtree is a name which is local to that function. */
231 DEMANGLE_COMPONENT_LOCAL_NAME,
232 /* A typed name. The left subtree is a name, and the right subtree
233 describes that name as a function. */
234 DEMANGLE_COMPONENT_TYPED_NAME,
235 /* A template. The left subtree is a template name, and the right
236 subtree is a template argument list. */
237 DEMANGLE_COMPONENT_TEMPLATE,
238 /* A template parameter. This holds a number, which is the template
239 parameter index. */
240 DEMANGLE_COMPONENT_TEMPLATE_PARAM,
241 /* A function parameter. This holds a number, which is the index. */
242 DEMANGLE_COMPONENT_FUNCTION_PARAM,
243 /* A constructor. This holds a name and the kind of
244 constructor. */
245 DEMANGLE_COMPONENT_CTOR,
246 /* A destructor. This holds a name and the kind of destructor. */
247 DEMANGLE_COMPONENT_DTOR,
248 /* A vtable. This has one subtree, the type for which this is a
249 vtable. */
250 DEMANGLE_COMPONENT_VTABLE,
251 /* A VTT structure. This has one subtree, the type for which this
252 is a VTT. */
253 DEMANGLE_COMPONENT_VTT,
254 /* A construction vtable. The left subtree is the type for which
255 this is a vtable, and the right subtree is the derived type for
256 which this vtable is built. */
257 DEMANGLE_COMPONENT_CONSTRUCTION_VTABLE,
258 /* A typeinfo structure. This has one subtree, the type for which
259 this is the tpeinfo structure. */
260 DEMANGLE_COMPONENT_TYPEINFO,
261 /* A typeinfo name. This has one subtree, the type for which this
262 is the typeinfo name. */
263 DEMANGLE_COMPONENT_TYPEINFO_NAME,
264 /* A typeinfo function. This has one subtree, the type for which
265 this is the tpyeinfo function. */
266 DEMANGLE_COMPONENT_TYPEINFO_FN,
267 /* A thunk. This has one subtree, the name for which this is a
268 thunk. */
269 DEMANGLE_COMPONENT_THUNK,
270 /* A virtual thunk. This has one subtree, the name for which this
271 is a virtual thunk. */
272 DEMANGLE_COMPONENT_VIRTUAL_THUNK,
273 /* A covariant thunk. This has one subtree, the name for which this
274 is a covariant thunk. */
275 DEMANGLE_COMPONENT_COVARIANT_THUNK,
276 /* A Java class. This has one subtree, the type. */
277 DEMANGLE_COMPONENT_JAVA_CLASS,
278 /* A guard variable. This has one subtree, the name for which this
279 is a guard variable. */
280 DEMANGLE_COMPONENT_GUARD,
281 /* The init and wrapper functions for C++11 thread_local variables. */
282 DEMANGLE_COMPONENT_TLS_INIT,
283 DEMANGLE_COMPONENT_TLS_WRAPPER,
284 /* A reference temporary. This has one subtree, the name for which
285 this is a temporary. */
286 DEMANGLE_COMPONENT_REFTEMP,
287 /* A hidden alias. This has one subtree, the encoding for which it
288 is providing alternative linkage. */
289 DEMANGLE_COMPONENT_HIDDEN_ALIAS,
290 /* A standard substitution. This holds the name of the
291 substitution. */
292 DEMANGLE_COMPONENT_SUB_STD,
293 /* The restrict qualifier. The one subtree is the type which is
294 being qualified. */
295 DEMANGLE_COMPONENT_RESTRICT,
296 /* The volatile qualifier. The one subtree is the type which is
297 being qualified. */
298 DEMANGLE_COMPONENT_VOLATILE,
299 /* The const qualifier. The one subtree is the type which is being
300 qualified. */
301 DEMANGLE_COMPONENT_CONST,
302 /* The restrict qualifier modifying a member function. The one
303 subtree is the type which is being qualified. */
304 DEMANGLE_COMPONENT_RESTRICT_THIS,
305 /* The volatile qualifier modifying a member function. The one
306 subtree is the type which is being qualified. */
307 DEMANGLE_COMPONENT_VOLATILE_THIS,
308 /* The const qualifier modifying a member function. The one subtree
309 is the type which is being qualified. */
310 DEMANGLE_COMPONENT_CONST_THIS,
311 /* C++11 A reference modifying a member function. The one subtree is the
312 type which is being referenced. */
313 DEMANGLE_COMPONENT_REFERENCE_THIS,
314 /* C++11: An rvalue reference modifying a member function. The one
315 subtree is the type which is being referenced. */
316 DEMANGLE_COMPONENT_RVALUE_REFERENCE_THIS,
317 /* A vendor qualifier. The left subtree is the type which is being
318 qualified, and the right subtree is the name of the
319 qualifier. */
320 DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL,
321 /* A pointer. The one subtree is the type which is being pointed
322 to. */
323 DEMANGLE_COMPONENT_POINTER,
324 /* A reference. The one subtree is the type which is being
325 referenced. */
326 DEMANGLE_COMPONENT_REFERENCE,
327 /* C++0x: An rvalue reference. The one subtree is the type which is
328 being referenced. */
329 DEMANGLE_COMPONENT_RVALUE_REFERENCE,
330 /* A complex type. The one subtree is the base type. */
331 DEMANGLE_COMPONENT_COMPLEX,
332 /* An imaginary type. The one subtree is the base type. */
333 DEMANGLE_COMPONENT_IMAGINARY,
334 /* A builtin type. This holds the builtin type information. */
335 DEMANGLE_COMPONENT_BUILTIN_TYPE,
336 /* A vendor's builtin type. This holds the name of the type. */
337 DEMANGLE_COMPONENT_VENDOR_TYPE,
338 /* A function type. The left subtree is the return type. The right
339 subtree is a list of ARGLIST nodes. Either or both may be
340 NULL. */
341 DEMANGLE_COMPONENT_FUNCTION_TYPE,
342 /* An array type. The left subtree is the dimension, which may be
343 NULL, or a string (represented as DEMANGLE_COMPONENT_NAME), or an
344 expression. The right subtree is the element type. */
345 DEMANGLE_COMPONENT_ARRAY_TYPE,
346 /* A pointer to member type. The left subtree is the class type,
347 and the right subtree is the member type. CV-qualifiers appear
348 on the latter. */
349 DEMANGLE_COMPONENT_PTRMEM_TYPE,
350 /* A fixed-point type. */
351 DEMANGLE_COMPONENT_FIXED_TYPE,
352 /* A vector type. The left subtree is the number of elements,
353 the right subtree is the element type. */
354 DEMANGLE_COMPONENT_VECTOR_TYPE,
355 /* An argument list. The left subtree is the current argument, and
356 the right subtree is either NULL or another ARGLIST node. */
357 DEMANGLE_COMPONENT_ARGLIST,
358 /* A template argument list. The left subtree is the current
359 template argument, and the right subtree is either NULL or
360 another TEMPLATE_ARGLIST node. */
361 DEMANGLE_COMPONENT_TEMPLATE_ARGLIST,
362 /* A template parameter object (C++20). The left subtree is the
363 corresponding template argument. */
364 DEMANGLE_COMPONENT_TPARM_OBJ,
365 /* An initializer list. The left subtree is either an explicit type or
366 NULL, and the right subtree is a DEMANGLE_COMPONENT_ARGLIST. */
367 DEMANGLE_COMPONENT_INITIALIZER_LIST,
368 /* An operator. This holds information about a standard
369 operator. */
370 DEMANGLE_COMPONENT_OPERATOR,
371 /* An extended operator. This holds the number of arguments, and
372 the name of the extended operator. */
373 DEMANGLE_COMPONENT_EXTENDED_OPERATOR,
374 /* A typecast, represented as a unary operator. The one subtree is
375 the type to which the argument should be cast. */
376 DEMANGLE_COMPONENT_CAST,
377 /* A conversion operator, represented as a unary operator. The one
378 subtree is the type to which the argument should be converted
379 to. */
380 DEMANGLE_COMPONENT_CONVERSION,
381 /* A nullary expression. The left subtree is the operator. */
382 DEMANGLE_COMPONENT_NULLARY,
383 /* A unary expression. The left subtree is the operator, and the
384 right subtree is the single argument. */
385 DEMANGLE_COMPONENT_UNARY,
386 /* A binary expression. The left subtree is the operator, and the
387 right subtree is a BINARY_ARGS. */
388 DEMANGLE_COMPONENT_BINARY,
389 /* Arguments to a binary expression. The left subtree is the first
390 argument, and the right subtree is the second argument. */
391 DEMANGLE_COMPONENT_BINARY_ARGS,
392 /* A trinary expression. The left subtree is the operator, and the
393 right subtree is a TRINARY_ARG1. */
394 DEMANGLE_COMPONENT_TRINARY,
395 /* Arguments to a trinary expression. The left subtree is the first
396 argument, and the right subtree is a TRINARY_ARG2. */
397 DEMANGLE_COMPONENT_TRINARY_ARG1,
398 /* More arguments to a trinary expression. The left subtree is the
399 second argument, and the right subtree is the third argument. */
400 DEMANGLE_COMPONENT_TRINARY_ARG2,
401 /* A literal. The left subtree is the type, and the right subtree
402 is the value, represented as a DEMANGLE_COMPONENT_NAME. */
403 DEMANGLE_COMPONENT_LITERAL,
404 /* A negative literal. Like LITERAL, but the value is negated.
405 This is a minor hack: the NAME used for LITERAL points directly
406 to the mangled string, but since negative numbers are mangled
407 using 'n' instead of '-', we want a way to indicate a negative
408 number which involves neither modifying the mangled string nor
409 allocating a new copy of the literal in memory. */
410 DEMANGLE_COMPONENT_LITERAL_NEG,
411 /* A vendor's builtin expression. The left subtree holds the
412 expression's name, and the right subtree is a argument list. */
413 DEMANGLE_COMPONENT_VENDOR_EXPR,
414 /* A libgcj compiled resource. The left subtree is the name of the
415 resource. */
416 DEMANGLE_COMPONENT_JAVA_RESOURCE,
417 /* A name formed by the concatenation of two parts. The left
418 subtree is the first part and the right subtree the second. */
419 DEMANGLE_COMPONENT_COMPOUND_NAME,
420 /* A name formed by a single character. */
421 DEMANGLE_COMPONENT_CHARACTER,
422 /* A number. */
423 DEMANGLE_COMPONENT_NUMBER,
424 /* A decltype type. */
425 DEMANGLE_COMPONENT_DECLTYPE,
426 /* Global constructors keyed to name. */
427 DEMANGLE_COMPONENT_GLOBAL_CONSTRUCTORS,
428 /* Global destructors keyed to name. */
429 DEMANGLE_COMPONENT_GLOBAL_DESTRUCTORS,
430 /* A lambda closure type. */
431 DEMANGLE_COMPONENT_LAMBDA,
432 /* A default argument scope. */
433 DEMANGLE_COMPONENT_DEFAULT_ARG,
434 /* An unnamed type. */
435 DEMANGLE_COMPONENT_UNNAMED_TYPE,
436 /* A transactional clone. This has one subtree, the encoding for
437 which it is providing alternative linkage. */
438 DEMANGLE_COMPONENT_TRANSACTION_CLONE,
439 /* A non-transactional clone entry point. In the i386/x86_64 abi,
440 the unmangled symbol of a tm_callable becomes a thunk and the
441 non-transactional function version is mangled thus. */
442 DEMANGLE_COMPONENT_NONTRANSACTION_CLONE,
443 /* A pack expansion. */
444 DEMANGLE_COMPONENT_PACK_EXPANSION,
445 /* A name with an ABI tag. */
446 DEMANGLE_COMPONENT_TAGGED_NAME,
447 /* A transaction-safe function type. */
448 DEMANGLE_COMPONENT_TRANSACTION_SAFE,
449 /* A cloned function. */
450 DEMANGLE_COMPONENT_CLONE,
451 DEMANGLE_COMPONENT_NOEXCEPT,
452 DEMANGLE_COMPONENT_THROW_SPEC
453};
454
455/* Types which are only used internally. */
456
457struct demangle_operator_info;
458struct demangle_builtin_type_info;
459
460/* A node in the tree representation is an instance of a struct
461 demangle_component. Note that the field names of the struct are
462 not well protected against macros defined by the file including
463 this one. We can fix this if it ever becomes a problem. */
464
465struct demangle_component
466{
467 /* The type of this component. */
468 enum demangle_component_type type;
469
470 /* Guard against recursive component printing.
471 Initialize to zero. Private to d_print_comp.
472 All other fields are final after initialization. */
473 int d_printing;
474 int d_counting;
475
476 union
477 {
478 /* For DEMANGLE_COMPONENT_NAME. */
479 struct
480 {
481 /* A pointer to the name (which need not NULL terminated) and
482 its length. */
483 const char *s;
484 int len;
485 } s_name;
486
487 /* For DEMANGLE_COMPONENT_OPERATOR. */
488 struct
489 {
490 /* Operator. */
491 const struct demangle_operator_info *op;
492 } s_operator;
493
494 /* For DEMANGLE_COMPONENT_EXTENDED_OPERATOR. */
495 struct
496 {
497 /* Number of arguments. */
498 int args;
499 /* Name. */
500 struct demangle_component *name;
501 } s_extended_operator;
502
503 /* For DEMANGLE_COMPONENT_FIXED_TYPE. */
504 struct
505 {
506 /* The length, indicated by a C integer type name. */
507 struct demangle_component *length;
508 /* _Accum or _Fract? */
509 short accum;
510 /* Saturating or not? */
511 short sat;
512 } s_fixed;
513
514 /* For DEMANGLE_COMPONENT_CTOR. */
515 struct
516 {
517 /* Kind of constructor. */
518 enum gnu_v3_ctor_kinds kind;
519 /* Name. */
520 struct demangle_component *name;
521 } s_ctor;
522
523 /* For DEMANGLE_COMPONENT_DTOR. */
524 struct
525 {
526 /* Kind of destructor. */
527 enum gnu_v3_dtor_kinds kind;
528 /* Name. */
529 struct demangle_component *name;
530 } s_dtor;
531
532 /* For DEMANGLE_COMPONENT_BUILTIN_TYPE. */
533 struct
534 {
535 /* Builtin type. */
536 const struct demangle_builtin_type_info *type;
537 } s_builtin;
538
539 /* For DEMANGLE_COMPONENT_SUB_STD. */
540 struct
541 {
542 /* Standard substitution string. */
543 const char* string;
544 /* Length of string. */
545 int len;
546 } s_string;
547
548 /* For DEMANGLE_COMPONENT_*_PARAM. */
549 struct
550 {
551 /* Parameter index. */
552 long number;
553 } s_number;
554
555 /* For DEMANGLE_COMPONENT_CHARACTER. */
556 struct
557 {
558 int character;
559 } s_character;
560
561 /* For other types. */
562 struct
563 {
564 /* Left (or only) subtree. */
565 struct demangle_component *left;
566 /* Right subtree. */
567 struct demangle_component *right;
568 } s_binary;
569
570 struct
571 {
572 /* subtree, same place as d_left. */
573 struct demangle_component *sub;
574 /* integer. */
575 int num;
576 } s_unary_num;
577
578 } u;
579};
580
581/* People building mangled trees are expected to allocate instances of
582 struct demangle_component themselves. They can then call one of
583 the following functions to fill them in. */
584
585/* Fill in most component types with a left subtree and a right
586 subtree. Returns non-zero on success, zero on failure, such as an
587 unrecognized or inappropriate component type. */
588
589extern int
590cplus_demangle_fill_component (struct demangle_component *fill,
591 enum demangle_component_type,
592 struct demangle_component *left,
593 struct demangle_component *right);
594
595/* Fill in a DEMANGLE_COMPONENT_NAME. Returns non-zero on success,
596 zero for bad arguments. */
597
598extern int
599cplus_demangle_fill_name (struct demangle_component *fill,
600 const char *, int);
601
602/* Fill in a DEMANGLE_COMPONENT_BUILTIN_TYPE, using the name of the
603 builtin type (e.g., "int", etc.). Returns non-zero on success,
604 zero if the type is not recognized. */
605
606extern int
607cplus_demangle_fill_builtin_type (struct demangle_component *fill,
608 const char *type_name);
609
610/* Fill in a DEMANGLE_COMPONENT_OPERATOR, using the name of the
611 operator and the number of arguments which it takes (the latter is
612 used to disambiguate operators which can be both binary and unary,
613 such as '-'). Returns non-zero on success, zero if the operator is
614 not recognized. */
615
616extern int
617cplus_demangle_fill_operator (struct demangle_component *fill,
618 const char *opname, int args);
619
620/* Fill in a DEMANGLE_COMPONENT_EXTENDED_OPERATOR, providing the
621 number of arguments and the name. Returns non-zero on success,
622 zero for bad arguments. */
623
624extern int
625cplus_demangle_fill_extended_operator (struct demangle_component *fill,
626 int numargs,
627 struct demangle_component *nm);
628
629/* Fill in a DEMANGLE_COMPONENT_CTOR. Returns non-zero on success,
630 zero for bad arguments. */
631
632extern int
633cplus_demangle_fill_ctor (struct demangle_component *fill,
634 enum gnu_v3_ctor_kinds kind,
635 struct demangle_component *name);
636
637/* Fill in a DEMANGLE_COMPONENT_DTOR. Returns non-zero on success,
638 zero for bad arguments. */
639
640extern int
641cplus_demangle_fill_dtor (struct demangle_component *fill,
642 enum gnu_v3_dtor_kinds kind,
643 struct demangle_component *name);
644
645/* This function translates a mangled name into a struct
646 demangle_component tree. The first argument is the mangled name.
647 The second argument is DMGL_* options. This returns a pointer to a
648 tree on success, or NULL on failure. On success, the third
649 argument is set to a block of memory allocated by malloc. This
650 block should be passed to free when the tree is no longer
651 needed. */
652
653extern struct demangle_component *
654cplus_demangle_v3_components (const char *mangled, int options, void **mem);
655
656/* This function takes a struct demangle_component tree and returns
657 the corresponding demangled string. The first argument is DMGL_*
658 options. The second is the tree to demangle. The third is a guess
659 at the length of the demangled string, used to initially allocate
660 the return buffer. The fourth is a pointer to a size_t. On
661 success, this function returns a buffer allocated by malloc(), and
662 sets the size_t pointed to by the fourth argument to the size of
663 the allocated buffer (not the length of the returned string). On
664 failure, this function returns NULL, and sets the size_t pointed to
665 by the fourth argument to 0 for an invalid tree, or to 1 for a
666 memory allocation error. */
667
668extern char *
669cplus_demangle_print (int options,
670 struct demangle_component *tree,
671 int estimated_length,
672 size_t *p_allocated_size);
673
674/* This function takes a struct demangle_component tree and passes back
675 a demangled string in one or more calls to a callback function.
676 The first argument is DMGL_* options. The second is the tree to
677 demangle. The third is a pointer to a callback function; on each call
678 this receives an element of the demangled string, its length, and an
679 opaque value. The fourth is the opaque value passed to the callback.
680 The callback is called once or more to return the full demangled
681 string. The demangled element string is always nul-terminated, though
682 its length is also provided for convenience. In contrast to
683 cplus_demangle_print(), this function does not allocate heap memory
684 to grow output strings (except perhaps where alloca() is implemented
685 by malloc()), and so is normally safe for use where the heap has been
686 corrupted. On success, this function returns 1; on failure, 0. */
687
688extern int
689cplus_demangle_print_callback (int options,
690 struct demangle_component *tree,
691 demangle_callbackref callback, void *opaque);
692
693#ifdef __cplusplus
694}
695#endif /* __cplusplus */
696
697#endif /* DEMANGLE_H */
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