include/demangle.h

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