xref: /dragonfly/contrib/gdb-7/include/demangle.h (revision 6e278935)
1 /* Defs for interface to demanglers.
2    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002,
3    2003, 2004, 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
4 
5    This program is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Library General Public License
7    as published by the Free Software Foundation; either version 2, or
8    (at your option) any later version.
9 
10    In addition to the permissions in the GNU Library General Public
11    License, the Free Software Foundation gives you unlimited
12    permission to link the compiled version of this file into
13    combinations with other programs, and to distribute those
14    combinations without any restriction coming from the use of this
15    file.  (The Library Public License restrictions do apply in other
16    respects; for example, they cover modification of the file, and
17    distribution when not linked into a combined executable.)
18 
19    This program is distributed in the hope that it will be useful, but
20    WITHOUT ANY WARRANTY; without even the implied warranty of
21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
22    Library General Public License for more details.
23 
24    You should have received a copy of the GNU Library General Public
25    License along with this program; if not, write to the Free Software
26    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
27    02110-1301, USA.  */
28 
29 
30 #if !defined (DEMANGLE_H)
31 #define DEMANGLE_H
32 
33 #include "libiberty.h"
34 
35 #ifdef __cplusplus
36 extern "C" {
37 #endif /* __cplusplus */
38 
39 /* Options passed to cplus_demangle (in 2nd parameter). */
40 
41 #define DMGL_NO_OPTS	 0		/* For readability... */
42 #define DMGL_PARAMS	 (1 << 0)	/* Include function args */
43 #define DMGL_ANSI	 (1 << 1)	/* Include const, volatile, etc */
44 #define DMGL_JAVA	 (1 << 2)	/* Demangle as Java rather than C++. */
45 #define DMGL_VERBOSE	 (1 << 3)	/* Include implementation details.  */
46 #define DMGL_TYPES	 (1 << 4)	/* Also try to demangle type encodings.  */
47 #define DMGL_RET_POSTFIX (1 << 5)       /* Print function return types (when
48 					   present) after function signature.
49 					   It applies only to the toplevel
50 					   function type.  */
51 #define DMGL_RET_DROP	 (1 << 6)       /* Suppress printing function return
52 					   types, even if present.  It applies
53 					   only to the toplevel function type.
54 					   */
55 
56 #define DMGL_AUTO	 (1 << 8)
57 #define DMGL_GNU	 (1 << 9)
58 #define DMGL_LUCID	 (1 << 10)
59 #define DMGL_ARM	 (1 << 11)
60 #define DMGL_HP 	 (1 << 12)       /* For the HP aCC compiler;
61                                             same as ARM except for
62                                             template arguments, etc. */
63 #define DMGL_EDG	 (1 << 13)
64 #define DMGL_GNU_V3	 (1 << 14)
65 #define DMGL_GNAT	 (1 << 15)
66 
67 /* If none of these are set, use 'current_demangling_style' as the default. */
68 #define DMGL_STYLE_MASK (DMGL_AUTO|DMGL_GNU|DMGL_LUCID|DMGL_ARM|DMGL_HP|DMGL_EDG|DMGL_GNU_V3|DMGL_JAVA|DMGL_GNAT)
69 
70 /* Enumeration of possible demangling styles.
71 
72    Lucid and ARM styles are still kept logically distinct, even though
73    they now both behave identically.  The resulting style is actual the
74    union of both.  I.E. either style recognizes both "__pt__" and "__rf__"
75    for operator "->", even though the first is lucid style and the second
76    is ARM style. (FIXME?) */
77 
78 extern enum demangling_styles
79 {
80   no_demangling = -1,
81   unknown_demangling = 0,
82   auto_demangling = DMGL_AUTO,
83   gnu_demangling = DMGL_GNU,
84   lucid_demangling = DMGL_LUCID,
85   arm_demangling = DMGL_ARM,
86   hp_demangling = DMGL_HP,
87   edg_demangling = DMGL_EDG,
88   gnu_v3_demangling = DMGL_GNU_V3,
89   java_demangling = DMGL_JAVA,
90   gnat_demangling = DMGL_GNAT
91 } current_demangling_style;
92 
93 /* Define string names for the various demangling styles. */
94 
95 #define NO_DEMANGLING_STYLE_STRING            "none"
96 #define AUTO_DEMANGLING_STYLE_STRING	      "auto"
97 #define GNU_DEMANGLING_STYLE_STRING    	      "gnu"
98 #define LUCID_DEMANGLING_STYLE_STRING	      "lucid"
99 #define ARM_DEMANGLING_STYLE_STRING	      "arm"
100 #define HP_DEMANGLING_STYLE_STRING	      "hp"
101 #define EDG_DEMANGLING_STYLE_STRING	      "edg"
102 #define GNU_V3_DEMANGLING_STYLE_STRING        "gnu-v3"
103 #define JAVA_DEMANGLING_STYLE_STRING          "java"
104 #define GNAT_DEMANGLING_STYLE_STRING          "gnat"
105 
106 /* Some macros to test what demangling style is active. */
107 
108 #define CURRENT_DEMANGLING_STYLE current_demangling_style
109 #define AUTO_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_AUTO)
110 #define GNU_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNU)
111 #define LUCID_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_LUCID)
112 #define ARM_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_ARM)
113 #define HP_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_HP)
114 #define EDG_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_EDG)
115 #define GNU_V3_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNU_V3)
116 #define JAVA_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_JAVA)
117 #define GNAT_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNAT)
118 
119 /* Provide information about the available demangle styles. This code is
120    pulled from gdb into libiberty because it is useful to binutils also.  */
121 
122 extern const struct demangler_engine
123 {
124   const char *const demangling_style_name;
125   const enum demangling_styles demangling_style;
126   const char *const demangling_style_doc;
127 } libiberty_demanglers[];
128 
129 extern char *
130 cplus_demangle (const char *mangled, int options);
131 
132 extern int
133 cplus_demangle_opname (const char *opname, char *result, int options);
134 
135 extern const char *
136 cplus_mangle_opname (const char *opname, int options);
137 
138 /* Note: This sets global state.  FIXME if you care about multi-threading. */
139 
140 extern void
141 set_cplus_marker_for_demangling (int ch);
142 
143 extern enum demangling_styles
144 cplus_demangle_set_style (enum demangling_styles style);
145 
146 extern enum demangling_styles
147 cplus_demangle_name_to_style (const char *name);
148 
149 /* Callback typedef for allocation-less demangler interfaces. */
150 typedef void (*demangle_callbackref) (const char *, size_t, void *);
151 
152 /* V3 ABI demangling entry points, defined in cp-demangle.c.  Callback
153    variants return non-zero on success, zero on error.  char* variants
154    return a string allocated by malloc on success, NULL on error.  */
155 extern int
156 cplus_demangle_v3_callback (const char *mangled, int options,
157                             demangle_callbackref callback, void *opaque);
158 
159 extern char*
160 cplus_demangle_v3 (const char *mangled, int options);
161 
162 extern int
163 java_demangle_v3_callback (const char *mangled,
164                            demangle_callbackref callback, void *opaque);
165 
166 extern char*
167 java_demangle_v3 (const char *mangled);
168 
169 char *
170 ada_demangle (const char *mangled, int options);
171 
172 enum gnu_v3_ctor_kinds {
173   gnu_v3_complete_object_ctor = 1,
174   gnu_v3_base_object_ctor,
175   gnu_v3_complete_object_allocating_ctor
176 };
177 
178 /* Return non-zero iff NAME is the mangled form of a constructor name
179    in the G++ V3 ABI demangling style.  Specifically, return an `enum
180    gnu_v3_ctor_kinds' value indicating what kind of constructor
181    it is.  */
182 extern enum gnu_v3_ctor_kinds
183 	is_gnu_v3_mangled_ctor (const char *name);
184 
185 
186 enum gnu_v3_dtor_kinds {
187   gnu_v3_deleting_dtor = 1,
188   gnu_v3_complete_object_dtor,
189   gnu_v3_base_object_dtor
190 };
191 
192 /* Return non-zero iff NAME is the mangled form of a destructor name
193    in the G++ V3 ABI demangling style.  Specifically, return an `enum
194    gnu_v3_dtor_kinds' value, indicating what kind of destructor
195    it is.  */
196 extern enum gnu_v3_dtor_kinds
197 	is_gnu_v3_mangled_dtor (const char *name);
198 
199 /* The V3 demangler works in two passes.  The first pass builds a tree
200    representation of the mangled name, and the second pass turns the
201    tree representation into a demangled string.  Here we define an
202    interface to permit a caller to build their own tree
203    representation, which they can pass to the demangler to get a
204    demangled string.  This can be used to canonicalize user input into
205    something which the demangler might output.  It could also be used
206    by other demanglers in the future.  */
207 
208 /* These are the component types which may be found in the tree.  Many
209    component types have one or two subtrees, referred to as left and
210    right (a component type with only one subtree puts it in the left
211    subtree).  */
212 
213 enum demangle_component_type
214 {
215   /* A name, with a length and a pointer to a string.  */
216   DEMANGLE_COMPONENT_NAME,
217   /* A qualified name.  The left subtree is a class or namespace or
218      some such thing, and the right subtree is a name qualified by
219      that class.  */
220   DEMANGLE_COMPONENT_QUAL_NAME,
221   /* A local name.  The left subtree describes a function, and the
222      right subtree is a name which is local to that function.  */
223   DEMANGLE_COMPONENT_LOCAL_NAME,
224   /* A typed name.  The left subtree is a name, and the right subtree
225      describes that name as a function.  */
226   DEMANGLE_COMPONENT_TYPED_NAME,
227   /* A template.  The left subtree is a template name, and the right
228      subtree is a template argument list.  */
229   DEMANGLE_COMPONENT_TEMPLATE,
230   /* A template parameter.  This holds a number, which is the template
231      parameter index.  */
232   DEMANGLE_COMPONENT_TEMPLATE_PARAM,
233   /* A function parameter.  This holds a number, which is the index.  */
234   DEMANGLE_COMPONENT_FUNCTION_PARAM,
235   /* A constructor.  This holds a name and the kind of
236      constructor.  */
237   DEMANGLE_COMPONENT_CTOR,
238   /* A destructor.  This holds a name and the kind of destructor.  */
239   DEMANGLE_COMPONENT_DTOR,
240   /* A vtable.  This has one subtree, the type for which this is a
241      vtable.  */
242   DEMANGLE_COMPONENT_VTABLE,
243   /* A VTT structure.  This has one subtree, the type for which this
244      is a VTT.  */
245   DEMANGLE_COMPONENT_VTT,
246   /* A construction vtable.  The left subtree is the type for which
247      this is a vtable, and the right subtree is the derived type for
248      which this vtable is built.  */
249   DEMANGLE_COMPONENT_CONSTRUCTION_VTABLE,
250   /* A typeinfo structure.  This has one subtree, the type for which
251      this is the tpeinfo structure.  */
252   DEMANGLE_COMPONENT_TYPEINFO,
253   /* A typeinfo name.  This has one subtree, the type for which this
254      is the typeinfo name.  */
255   DEMANGLE_COMPONENT_TYPEINFO_NAME,
256   /* A typeinfo function.  This has one subtree, the type for which
257      this is the tpyeinfo function.  */
258   DEMANGLE_COMPONENT_TYPEINFO_FN,
259   /* A thunk.  This has one subtree, the name for which this is a
260      thunk.  */
261   DEMANGLE_COMPONENT_THUNK,
262   /* A virtual thunk.  This has one subtree, the name for which this
263      is a virtual thunk.  */
264   DEMANGLE_COMPONENT_VIRTUAL_THUNK,
265   /* A covariant thunk.  This has one subtree, the name for which this
266      is a covariant thunk.  */
267   DEMANGLE_COMPONENT_COVARIANT_THUNK,
268   /* A Java class.  This has one subtree, the type.  */
269   DEMANGLE_COMPONENT_JAVA_CLASS,
270   /* A guard variable.  This has one subtree, the name for which this
271      is a guard variable.  */
272   DEMANGLE_COMPONENT_GUARD,
273   /* A reference temporary.  This has one subtree, the name for which
274      this is a temporary.  */
275   DEMANGLE_COMPONENT_REFTEMP,
276   /* A hidden alias.  This has one subtree, the encoding for which it
277      is providing alternative linkage.  */
278   DEMANGLE_COMPONENT_HIDDEN_ALIAS,
279   /* A standard substitution.  This holds the name of the
280      substitution.  */
281   DEMANGLE_COMPONENT_SUB_STD,
282   /* The restrict qualifier.  The one subtree is the type which is
283      being qualified.  */
284   DEMANGLE_COMPONENT_RESTRICT,
285   /* The volatile qualifier.  The one subtree is the type which is
286      being qualified.  */
287   DEMANGLE_COMPONENT_VOLATILE,
288   /* The const qualifier.  The one subtree is the type which is being
289      qualified.  */
290   DEMANGLE_COMPONENT_CONST,
291   /* The restrict qualifier modifying a member function.  The one
292      subtree is the type which is being qualified.  */
293   DEMANGLE_COMPONENT_RESTRICT_THIS,
294   /* The volatile qualifier modifying a member function.  The one
295      subtree is the type which is being qualified.  */
296   DEMANGLE_COMPONENT_VOLATILE_THIS,
297   /* The const qualifier modifying a member function.  The one subtree
298      is the type which is being qualified.  */
299   DEMANGLE_COMPONENT_CONST_THIS,
300   /* A vendor qualifier.  The left subtree is the type which is being
301      qualified, and the right subtree is the name of the
302      qualifier.  */
303   DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL,
304   /* A pointer.  The one subtree is the type which is being pointed
305      to.  */
306   DEMANGLE_COMPONENT_POINTER,
307   /* A reference.  The one subtree is the type which is being
308      referenced.  */
309   DEMANGLE_COMPONENT_REFERENCE,
310   /* C++0x: An rvalue reference.  The one subtree is the type which is
311      being referenced.  */
312   DEMANGLE_COMPONENT_RVALUE_REFERENCE,
313   /* A complex type.  The one subtree is the base type.  */
314   DEMANGLE_COMPONENT_COMPLEX,
315   /* An imaginary type.  The one subtree is the base type.  */
316   DEMANGLE_COMPONENT_IMAGINARY,
317   /* A builtin type.  This holds the builtin type information.  */
318   DEMANGLE_COMPONENT_BUILTIN_TYPE,
319   /* A vendor's builtin type.  This holds the name of the type.  */
320   DEMANGLE_COMPONENT_VENDOR_TYPE,
321   /* A function type.  The left subtree is the return type.  The right
322      subtree is a list of ARGLIST nodes.  Either or both may be
323      NULL.  */
324   DEMANGLE_COMPONENT_FUNCTION_TYPE,
325   /* An array type.  The left subtree is the dimension, which may be
326      NULL, or a string (represented as DEMANGLE_COMPONENT_NAME), or an
327      expression.  The right subtree is the element type.  */
328   DEMANGLE_COMPONENT_ARRAY_TYPE,
329   /* A pointer to member type.  The left subtree is the class type,
330      and the right subtree is the member type.  CV-qualifiers appear
331      on the latter.  */
332   DEMANGLE_COMPONENT_PTRMEM_TYPE,
333   /* A fixed-point type.  */
334   DEMANGLE_COMPONENT_FIXED_TYPE,
335   /* A vector type.  The left subtree is the number of elements,
336      the right subtree is the element type.  */
337   DEMANGLE_COMPONENT_VECTOR_TYPE,
338   /* An argument list.  The left subtree is the current argument, and
339      the right subtree is either NULL or another ARGLIST node.  */
340   DEMANGLE_COMPONENT_ARGLIST,
341   /* A template argument list.  The left subtree is the current
342      template argument, and the right subtree is either NULL or
343      another TEMPLATE_ARGLIST node.  */
344   DEMANGLE_COMPONENT_TEMPLATE_ARGLIST,
345   /* An operator.  This holds information about a standard
346      operator.  */
347   DEMANGLE_COMPONENT_OPERATOR,
348   /* An extended operator.  This holds the number of arguments, and
349      the name of the extended operator.  */
350   DEMANGLE_COMPONENT_EXTENDED_OPERATOR,
351   /* A typecast, represented as a unary operator.  The one subtree is
352      the type to which the argument should be cast.  */
353   DEMANGLE_COMPONENT_CAST,
354   /* A unary expression.  The left subtree is the operator, and the
355      right subtree is the single argument.  */
356   DEMANGLE_COMPONENT_UNARY,
357   /* A binary expression.  The left subtree is the operator, and the
358      right subtree is a BINARY_ARGS.  */
359   DEMANGLE_COMPONENT_BINARY,
360   /* Arguments to a binary expression.  The left subtree is the first
361      argument, and the right subtree is the second argument.  */
362   DEMANGLE_COMPONENT_BINARY_ARGS,
363   /* A trinary expression.  The left subtree is the operator, and the
364      right subtree is a TRINARY_ARG1.  */
365   DEMANGLE_COMPONENT_TRINARY,
366   /* Arguments to a trinary expression.  The left subtree is the first
367      argument, and the right subtree is a TRINARY_ARG2.  */
368   DEMANGLE_COMPONENT_TRINARY_ARG1,
369   /* More arguments to a trinary expression.  The left subtree is the
370      second argument, and the right subtree is the third argument.  */
371   DEMANGLE_COMPONENT_TRINARY_ARG2,
372   /* A literal.  The left subtree is the type, and the right subtree
373      is the value, represented as a DEMANGLE_COMPONENT_NAME.  */
374   DEMANGLE_COMPONENT_LITERAL,
375   /* A negative literal.  Like LITERAL, but the value is negated.
376      This is a minor hack: the NAME used for LITERAL points directly
377      to the mangled string, but since negative numbers are mangled
378      using 'n' instead of '-', we want a way to indicate a negative
379      number which involves neither modifying the mangled string nor
380      allocating a new copy of the literal in memory.  */
381   DEMANGLE_COMPONENT_LITERAL_NEG,
382   /* A libgcj compiled resource.  The left subtree is the name of the
383      resource.  */
384   DEMANGLE_COMPONENT_JAVA_RESOURCE,
385   /* A name formed by the concatenation of two parts.  The left
386      subtree is the first part and the right subtree the second.  */
387   DEMANGLE_COMPONENT_COMPOUND_NAME,
388   /* A name formed by a single character.  */
389   DEMANGLE_COMPONENT_CHARACTER,
390   /* A number.  */
391   DEMANGLE_COMPONENT_NUMBER,
392   /* A decltype type.  */
393   DEMANGLE_COMPONENT_DECLTYPE,
394   /* Global constructors keyed to name.  */
395   DEMANGLE_COMPONENT_GLOBAL_CONSTRUCTORS,
396   /* Global destructors keyed to name.  */
397   DEMANGLE_COMPONENT_GLOBAL_DESTRUCTORS,
398   /* A lambda closure type.  */
399   DEMANGLE_COMPONENT_LAMBDA,
400   /* A default argument scope.  */
401   DEMANGLE_COMPONENT_DEFAULT_ARG,
402   /* An unnamed type.  */
403   DEMANGLE_COMPONENT_UNNAMED_TYPE,
404   /* A pack expansion.  */
405   DEMANGLE_COMPONENT_PACK_EXPANSION
406 };
407 
408 /* Types which are only used internally.  */
409 
410 struct demangle_operator_info;
411 struct demangle_builtin_type_info;
412 
413 /* A node in the tree representation is an instance of a struct
414    demangle_component.  Note that the field names of the struct are
415    not well protected against macros defined by the file including
416    this one.  We can fix this if it ever becomes a problem.  */
417 
418 struct demangle_component
419 {
420   /* The type of this component.  */
421   enum demangle_component_type type;
422 
423   union
424   {
425     /* For DEMANGLE_COMPONENT_NAME.  */
426     struct
427     {
428       /* A pointer to the name (which need not NULL terminated) and
429 	 its length.  */
430       const char *s;
431       int len;
432     } s_name;
433 
434     /* For DEMANGLE_COMPONENT_OPERATOR.  */
435     struct
436     {
437       /* Operator.  */
438       const struct demangle_operator_info *op;
439     } s_operator;
440 
441     /* For DEMANGLE_COMPONENT_EXTENDED_OPERATOR.  */
442     struct
443     {
444       /* Number of arguments.  */
445       int args;
446       /* Name.  */
447       struct demangle_component *name;
448     } s_extended_operator;
449 
450     /* For DEMANGLE_COMPONENT_FIXED_TYPE.  */
451     struct
452     {
453       /* The length, indicated by a C integer type name.  */
454       struct demangle_component *length;
455       /* _Accum or _Fract?  */
456       short accum;
457       /* Saturating or not?  */
458       short sat;
459     } s_fixed;
460 
461     /* For DEMANGLE_COMPONENT_CTOR.  */
462     struct
463     {
464       /* Kind of constructor.  */
465       enum gnu_v3_ctor_kinds kind;
466       /* Name.  */
467       struct demangle_component *name;
468     } s_ctor;
469 
470     /* For DEMANGLE_COMPONENT_DTOR.  */
471     struct
472     {
473       /* Kind of destructor.  */
474       enum gnu_v3_dtor_kinds kind;
475       /* Name.  */
476       struct demangle_component *name;
477     } s_dtor;
478 
479     /* For DEMANGLE_COMPONENT_BUILTIN_TYPE.  */
480     struct
481     {
482       /* Builtin type.  */
483       const struct demangle_builtin_type_info *type;
484     } s_builtin;
485 
486     /* For DEMANGLE_COMPONENT_SUB_STD.  */
487     struct
488     {
489       /* Standard substitution string.  */
490       const char* string;
491       /* Length of string.  */
492       int len;
493     } s_string;
494 
495     /* For DEMANGLE_COMPONENT_*_PARAM.  */
496     struct
497     {
498       /* Parameter index.  */
499       long number;
500     } s_number;
501 
502     /* For DEMANGLE_COMPONENT_CHARACTER.  */
503     struct
504     {
505       int character;
506     } s_character;
507 
508     /* For other types.  */
509     struct
510     {
511       /* Left (or only) subtree.  */
512       struct demangle_component *left;
513       /* Right subtree.  */
514       struct demangle_component *right;
515     } s_binary;
516 
517     struct
518     {
519       /* subtree, same place as d_left.  */
520       struct demangle_component *sub;
521       /* integer.  */
522       int num;
523     } s_unary_num;
524 
525   } u;
526 };
527 
528 /* People building mangled trees are expected to allocate instances of
529    struct demangle_component themselves.  They can then call one of
530    the following functions to fill them in.  */
531 
532 /* Fill in most component types with a left subtree and a right
533    subtree.  Returns non-zero on success, zero on failure, such as an
534    unrecognized or inappropriate component type.  */
535 
536 extern int
537 cplus_demangle_fill_component (struct demangle_component *fill,
538                                enum demangle_component_type,
539                                struct demangle_component *left,
540                                struct demangle_component *right);
541 
542 /* Fill in a DEMANGLE_COMPONENT_NAME.  Returns non-zero on success,
543    zero for bad arguments.  */
544 
545 extern int
546 cplus_demangle_fill_name (struct demangle_component *fill,
547                           const char *, int);
548 
549 /* Fill in a DEMANGLE_COMPONENT_BUILTIN_TYPE, using the name of the
550    builtin type (e.g., "int", etc.).  Returns non-zero on success,
551    zero if the type is not recognized.  */
552 
553 extern int
554 cplus_demangle_fill_builtin_type (struct demangle_component *fill,
555                                   const char *type_name);
556 
557 /* Fill in a DEMANGLE_COMPONENT_OPERATOR, using the name of the
558    operator and the number of arguments which it takes (the latter is
559    used to disambiguate operators which can be both binary and unary,
560    such as '-').  Returns non-zero on success, zero if the operator is
561    not recognized.  */
562 
563 extern int
564 cplus_demangle_fill_operator (struct demangle_component *fill,
565                               const char *opname, int args);
566 
567 /* Fill in a DEMANGLE_COMPONENT_EXTENDED_OPERATOR, providing the
568    number of arguments and the name.  Returns non-zero on success,
569    zero for bad arguments.  */
570 
571 extern int
572 cplus_demangle_fill_extended_operator (struct demangle_component *fill,
573                                        int numargs,
574                                        struct demangle_component *nm);
575 
576 /* Fill in a DEMANGLE_COMPONENT_CTOR.  Returns non-zero on success,
577    zero for bad arguments.  */
578 
579 extern int
580 cplus_demangle_fill_ctor (struct demangle_component *fill,
581                           enum gnu_v3_ctor_kinds kind,
582                           struct demangle_component *name);
583 
584 /* Fill in a DEMANGLE_COMPONENT_DTOR.  Returns non-zero on success,
585    zero for bad arguments.  */
586 
587 extern int
588 cplus_demangle_fill_dtor (struct demangle_component *fill,
589                           enum gnu_v3_dtor_kinds kind,
590                           struct demangle_component *name);
591 
592 /* This function translates a mangled name into a struct
593    demangle_component tree.  The first argument is the mangled name.
594    The second argument is DMGL_* options.  This returns a pointer to a
595    tree on success, or NULL on failure.  On success, the third
596    argument is set to a block of memory allocated by malloc.  This
597    block should be passed to free when the tree is no longer
598    needed.  */
599 
600 extern struct demangle_component *
601 cplus_demangle_v3_components (const char *mangled, int options, void **mem);
602 
603 /* This function takes a struct demangle_component tree and returns
604    the corresponding demangled string.  The first argument is DMGL_*
605    options.  The second is the tree to demangle.  The third is a guess
606    at the length of the demangled string, used to initially allocate
607    the return buffer.  The fourth is a pointer to a size_t.  On
608    success, this function returns a buffer allocated by malloc(), and
609    sets the size_t pointed to by the fourth argument to the size of
610    the allocated buffer (not the length of the returned string).  On
611    failure, this function returns NULL, and sets the size_t pointed to
612    by the fourth argument to 0 for an invalid tree, or to 1 for a
613    memory allocation error.  */
614 
615 extern char *
616 cplus_demangle_print (int options,
617                       const struct demangle_component *tree,
618                       int estimated_length,
619                       size_t *p_allocated_size);
620 
621 /* This function takes a struct demangle_component tree and passes back
622    a demangled string in one or more calls to a callback function.
623    The first argument is DMGL_* options.  The second is the tree to
624    demangle.  The third is a pointer to a callback function; on each call
625    this receives an element of the demangled string, its length, and an
626    opaque value.  The fourth is the opaque value passed to the callback.
627    The callback is called once or more to return the full demangled
628    string.  The demangled element string is always nul-terminated, though
629    its length is also provided for convenience.  In contrast to
630    cplus_demangle_print(), this function does not allocate heap memory
631    to grow output strings (except perhaps where alloca() is implemented
632    by malloc()), and so is normally safe for use where the heap has been
633    corrupted.  On success, this function returns 1; on failure, 0.  */
634 
635 extern int
636 cplus_demangle_print_callback (int options,
637                                const struct demangle_component *tree,
638                                demangle_callbackref callback, void *opaque);
639 
640 #ifdef __cplusplus
641 }
642 #endif /* __cplusplus */
643 
644 #endif	/* DEMANGLE_H */
645