include/demangle.h

   1 /* Defs for interface to demanglers.
   2    Copyright (C) 1992-2015 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
  35 extern "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         (1 << 9)
  57 #define DMGL_LUCID       (1 << 10)
  58 #define DMGL_ARM         (1 << 11)
  59 #define DMGL_HP          (1 << 12)       /* For the HP aCC compiler;
  60                                             same as ARM except for
  61                                             template arguments, etc. */
  62 #define DMGL_EDG         (1 << 13)
  63 #define DMGL_GNU_V3      (1 << 14)
  64 #define DMGL_GNAT        (1 << 15)
  65 #define DMGL_DLANG       (1 << 16)
  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|DMGL_DLANG)
  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   dlang_demangling = DMGL_DLANG
  92 } current_demangling_style;
  93
  94 /* Define string names for the various demangling styles. */
  95
  96 #define NO_DEMANGLING_STYLE_STRING            "none"
  97 #define AUTO_DEMANGLING_STYLE_STRING          "auto"
  98 #define GNU_DEMANGLING_STYLE_STRING           "gnu"
  99 #define LUCID_DEMANGLING_STYLE_STRING         "lucid"
 100 #define ARM_DEMANGLING_STYLE_STRING           "arm"
 101 #define HP_DEMANGLING_STYLE_STRING            "hp"
 102 #define EDG_DEMANGLING_STYLE_STRING           "edg"
 103 #define GNU_V3_DEMANGLING_STYLE_STRING        "gnu-v3"
 104 #define JAVA_DEMANGLING_STYLE_STRING          "java"
 105 #define GNAT_DEMANGLING_STYLE_STRING          "gnat"
 106 #define DLANG_DEMANGLING_STYLE_STRING         "dlang"
 107
 108 /* Some macros to test what demangling style is active. */
 109
 110 #define CURRENT_DEMANGLING_STYLE current_demangling_style
 111 #define AUTO_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_AUTO)
 112 #define GNU_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNU)
 113 #define LUCID_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_LUCID)
 114 #define ARM_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_ARM)
 115 #define HP_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_HP)
 116 #define EDG_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_EDG)
 117 #define GNU_V3_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNU_V3)
 118 #define JAVA_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_JAVA)
 119 #define GNAT_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNAT)
 120 #define DLANG_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_DLANG)
 121
 122 /* Provide information about the available demangle styles. This code is
 123    pulled from gdb into libiberty because it is useful to binutils also.  */
 124
 125 extern const struct demangler_engine
 126 {
 127   const char *const demangling_style_name;
 128   const enum demangling_styles demangling_style;
 129   const char *const demangling_style_doc;
 130 } libiberty_demanglers[];
 131
 132 extern char *
 133 cplus_demangle (const char *mangled, int options);
 134
 135 extern int
 136 cplus_demangle_opname (const char *opname, char *result, int options);
 137
 138 extern const char *
 139 cplus_mangle_opname (const char *opname, int options);
 140
 141 /* Note: This sets global state.  FIXME if you care about multi-threading. */
 142
 143 extern void
 144 set_cplus_marker_for_demangling (int ch);
 145
 146 extern enum demangling_styles
 147 cplus_demangle_set_style (enum demangling_styles style);
 148
 149 extern enum demangling_styles
 150 cplus_demangle_name_to_style (const char *name);
 151
 152 /* Callback typedef for allocation-less demangler interfaces. */
 153 typedef void (*demangle_callbackref) (const char *, size_t, void *);
 154
 155 /* V3 ABI demangling entry points, defined in cp-demangle.c.  Callback
 156    variants return non-zero on success, zero on error.  char* variants
 157    return a string allocated by malloc on success, NULL on error.  */
 158 extern int
 159 cplus_demangle_v3_callback (const char *mangled, int options,
 160                             demangle_callbackref callback, void *opaque);
 161
 162 extern char*
 163 cplus_demangle_v3 (const char *mangled, int options);
 164
 165 extern int
 166 java_demangle_v3_callback (const char *mangled,
 167                            demangle_callbackref callback, void *opaque);
 168
 169 extern char*
 170 java_demangle_v3 (const char *mangled);
 171
 172 char *
 173 ada_demangle (const char *mangled, int options);
 174
 175 extern char *
 176 dlang_demangle (const char *mangled, int options);
 177
 178 enum gnu_v3_ctor_kinds {
 179   gnu_v3_complete_object_ctor = 1,
 180   gnu_v3_base_object_ctor,
 181   gnu_v3_complete_object_allocating_ctor,
 182   /* These are not part of the V3 ABI.  Unified constructors are generated
 183      as a speed-for-space optimization when the -fdeclone-ctor-dtor option
 184      is used, and are always internal symbols.  */
 185   gnu_v3_unified_ctor,
 186   gnu_v3_object_ctor_group
 187 };
 188
 189 /* Return non-zero iff NAME is the mangled form of a constructor name
 190    in the G++ V3 ABI demangling style.  Specifically, return an `enum
 191    gnu_v3_ctor_kinds' value indicating what kind of constructor
 192    it is.  */
 193 extern enum gnu_v3_ctor_kinds
 194         is_gnu_v3_mangled_ctor (const char *name);
 195
 196
 197 enum gnu_v3_dtor_kinds {
 198   gnu_v3_deleting_dtor = 1,
 199   gnu_v3_complete_object_dtor,
 200   gnu_v3_base_object_dtor,
 201   /* These are not part of the V3 ABI.  Unified destructors are generated
 202      as a speed-for-space optimization when the -fdeclone-ctor-dtor option
 203      is used, and are always internal symbols.  */
 204   gnu_v3_unified_dtor,
 205   gnu_v3_object_dtor_group
 206 };
 207
 208 /* Return non-zero iff NAME is the mangled form of a destructor name
 209    in the G++ V3 ABI demangling style.  Specifically, return an `enum
 210    gnu_v3_dtor_kinds' value, indicating what kind of destructor
 211    it is.  */
 212 extern enum gnu_v3_dtor_kinds
 213         is_gnu_v3_mangled_dtor (const char *name);
 214
 215 /* The V3 demangler works in two passes.  The first pass builds a tree
 216    representation of the mangled name, and the second pass turns the
 217    tree representation into a demangled string.  Here we define an
 218    interface to permit a caller to build their own tree
 219    representation, which they can pass to the demangler to get a
 220    demangled string.  This can be used to canonicalize user input into
 221    something which the demangler might output.  It could also be used
 222    by other demanglers in the future.  */
 223
 224 /* These are the component types which may be found in the tree.  Many
 225    component types have one or two subtrees, referred to as left and
 226    right (a component type with only one subtree puts it in the left
 227    subtree).  */
 228
 229 enum demangle_component_type
 230 {
 231   /* A name, with a length and a pointer to a string.  */
 232   DEMANGLE_COMPONENT_NAME,
 233   /* A qualified name.  The left subtree is a class or namespace or
 234      some such thing, and the right subtree is a name qualified by
 235      that class.  */
 236   DEMANGLE_COMPONENT_QUAL_NAME,
 237   /* A local name.  The left subtree describes a function, and the
 238      right subtree is a name which is local to that function.  */
 239   DEMANGLE_COMPONENT_LOCAL_NAME,
 240   /* A typed name.  The left subtree is a name, and the right subtree
 241      describes that name as a function.  */
 242   DEMANGLE_COMPONENT_TYPED_NAME,
 243   /* A template.  The left subtree is a template name, and the right
 244      subtree is a template argument list.  */
 245   DEMANGLE_COMPONENT_TEMPLATE,
 246   /* A template parameter.  This holds a number, which is the template
 247      parameter index.  */
 248   DEMANGLE_COMPONENT_TEMPLATE_PARAM,
 249   /* A function parameter.  This holds a number, which is the index.  */
 250   DEMANGLE_COMPONENT_FUNCTION_PARAM,
 251   /* A constructor.  This holds a name and the kind of
 252      constructor.  */
 253   DEMANGLE_COMPONENT_CTOR,
 254   /* A destructor.  This holds a name and the kind of destructor.  */
 255   DEMANGLE_COMPONENT_DTOR,
 256   /* A vtable.  This has one subtree, the type for which this is a
 257      vtable.  */
 258   DEMANGLE_COMPONENT_VTABLE,
 259   /* A VTT structure.  This has one subtree, the type for which this
 260      is a VTT.  */
 261   DEMANGLE_COMPONENT_VTT,
 262   /* A construction vtable.  The left subtree is the type for which
 263      this is a vtable, and the right subtree is the derived type for
 264      which this vtable is built.  */
 265   DEMANGLE_COMPONENT_CONSTRUCTION_VTABLE,
 266   /* A typeinfo structure.  This has one subtree, the type for which
 267      this is the tpeinfo structure.  */
 268   DEMANGLE_COMPONENT_TYPEINFO,
 269   /* A typeinfo name.  This has one subtree, the type for which this
 270      is the typeinfo name.  */
 271   DEMANGLE_COMPONENT_TYPEINFO_NAME,
 272   /* A typeinfo function.  This has one subtree, the type for which
 273      this is the tpyeinfo function.  */
 274   DEMANGLE_COMPONENT_TYPEINFO_FN,
 275   /* A thunk.  This has one subtree, the name for which this is a
 276      thunk.  */
 277   DEMANGLE_COMPONENT_THUNK,
 278   /* A virtual thunk.  This has one subtree, the name for which this
 279      is a virtual thunk.  */
 280   DEMANGLE_COMPONENT_VIRTUAL_THUNK,
 281   /* A covariant thunk.  This has one subtree, the name for which this
 282      is a covariant thunk.  */
 283   DEMANGLE_COMPONENT_COVARIANT_THUNK,
 284   /* A Java class.  This has one subtree, the type.  */
 285   DEMANGLE_COMPONENT_JAVA_CLASS,
 286   /* A guard variable.  This has one subtree, the name for which this
 287      is a guard variable.  */
 288   DEMANGLE_COMPONENT_GUARD,
 289   /* The init and wrapper functions for C++11 thread_local variables.  */
 290   DEMANGLE_COMPONENT_TLS_INIT,
 291   DEMANGLE_COMPONENT_TLS_WRAPPER,
 292   /* A reference temporary.  This has one subtree, the name for which
 293      this is a temporary.  */
 294   DEMANGLE_COMPONENT_REFTEMP,
 295   /* A hidden alias.  This has one subtree, the encoding for which it
 296      is providing alternative linkage.  */
 297   DEMANGLE_COMPONENT_HIDDEN_ALIAS,
 298   /* A standard substitution.  This holds the name of the
 299      substitution.  */
 300   DEMANGLE_COMPONENT_SUB_STD,
 301   /* The restrict qualifier.  The one subtree is the type which is
 302      being qualified.  */
 303   DEMANGLE_COMPONENT_RESTRICT,
 304   /* The volatile qualifier.  The one subtree is the type which is
 305      being qualified.  */
 306   DEMANGLE_COMPONENT_VOLATILE,
 307   /* The const qualifier.  The one subtree is the type which is being
 308      qualified.  */
 309   DEMANGLE_COMPONENT_CONST,
 310   /* The restrict qualifier modifying a member function.  The one
 311      subtree is the type which is being qualified.  */
 312   DEMANGLE_COMPONENT_RESTRICT_THIS,
 313   /* The volatile qualifier modifying a member function.  The one
 314      subtree is the type which is being qualified.  */
 315   DEMANGLE_COMPONENT_VOLATILE_THIS,
 316   /* The const qualifier modifying a member function.  The one subtree
 317      is the type which is being qualified.  */
 318   DEMANGLE_COMPONENT_CONST_THIS,
 319   /* C++11 A reference modifying a member function.  The one subtree is the
 320      type which is being referenced.  */
 321   DEMANGLE_COMPONENT_REFERENCE_THIS,
 322   /* C++11: An rvalue reference modifying a member function.  The one
 323      subtree is the type which is being referenced.  */
 324   DEMANGLE_COMPONENT_RVALUE_REFERENCE_THIS,
 325   /* A vendor qualifier.  The left subtree is the type which is being
 326      qualified, and the right subtree is the name of the
 327      qualifier.  */
 328   DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL,
 329   /* A pointer.  The one subtree is the type which is being pointed
 330      to.  */
 331   DEMANGLE_COMPONENT_POINTER,
 332   /* A reference.  The one subtree is the type which is being
 333      referenced.  */
 334   DEMANGLE_COMPONENT_REFERENCE,
 335   /* C++0x: An rvalue reference.  The one subtree is the type which is
 336      being referenced.  */
 337   DEMANGLE_COMPONENT_RVALUE_REFERENCE,
 338   /* A complex type.  The one subtree is the base type.  */
 339   DEMANGLE_COMPONENT_COMPLEX,
 340   /* An imaginary type.  The one subtree is the base type.  */
 341   DEMANGLE_COMPONENT_IMAGINARY,
 342   /* A builtin type.  This holds the builtin type information.  */
 343   DEMANGLE_COMPONENT_BUILTIN_TYPE,
 344   /* A vendor's builtin type.  This holds the name of the type.  */
 345   DEMANGLE_COMPONENT_VENDOR_TYPE,
 346   /* A function type.  The left subtree is the return type.  The right
 347      subtree is a list of ARGLIST nodes.  Either or both may be
 348      NULL.  */
 349   DEMANGLE_COMPONENT_FUNCTION_TYPE,
 350   /* An array type.  The left subtree is the dimension, which may be
 351      NULL, or a string (represented as DEMANGLE_COMPONENT_NAME), or an
 352      expression.  The right subtree is the element type.  */
 353   DEMANGLE_COMPONENT_ARRAY_TYPE,
 354   /* A pointer to member type.  The left subtree is the class type,
 355      and the right subtree is the member type.  CV-qualifiers appear
 356      on the latter.  */
 357   DEMANGLE_COMPONENT_PTRMEM_TYPE,
 358   /* A fixed-point type.  */
 359   DEMANGLE_COMPONENT_FIXED_TYPE,
 360   /* A vector type.  The left subtree is the number of elements,
 361      the right subtree is the element type.  */
 362   DEMANGLE_COMPONENT_VECTOR_TYPE,
 363   /* An argument list.  The left subtree is the current argument, and
 364      the right subtree is either NULL or another ARGLIST node.  */
 365   DEMANGLE_COMPONENT_ARGLIST,
 366   /* A template argument list.  The left subtree is the current
 367      template argument, and the right subtree is either NULL or
 368      another TEMPLATE_ARGLIST node.  */
 369   DEMANGLE_COMPONENT_TEMPLATE_ARGLIST,
 370   /* An initializer list.  The left subtree is either an explicit type or
 371      NULL, and the right subtree is a DEMANGLE_COMPONENT_ARGLIST.  */
 372   DEMANGLE_COMPONENT_INITIALIZER_LIST,
 373   /* An operator.  This holds information about a standard
 374      operator.  */
 375   DEMANGLE_COMPONENT_OPERATOR,
 376   /* An extended operator.  This holds the number of arguments, and
 377      the name of the extended operator.  */
 378   DEMANGLE_COMPONENT_EXTENDED_OPERATOR,
 379   /* A typecast, represented as a unary operator.  The one subtree is
 380      the type to which the argument should be cast.  */
 381   DEMANGLE_COMPONENT_CAST,
 382   /* A nullary expression.  The left subtree is the operator.  */
 383   DEMANGLE_COMPONENT_NULLARY,
 384   /* A unary expression.  The left subtree is the operator, and the
 385      right subtree is the single argument.  */
 386   DEMANGLE_COMPONENT_UNARY,
 387   /* A binary expression.  The left subtree is the operator, and the
 388      right subtree is a BINARY_ARGS.  */
 389   DEMANGLE_COMPONENT_BINARY,
 390   /* Arguments to a binary expression.  The left subtree is the first
 391      argument, and the right subtree is the second argument.  */
 392   DEMANGLE_COMPONENT_BINARY_ARGS,
 393   /* A trinary expression.  The left subtree is the operator, and the
 394      right subtree is a TRINARY_ARG1.  */
 395   DEMANGLE_COMPONENT_TRINARY,
 396   /* Arguments to a trinary expression.  The left subtree is the first
 397      argument, and the right subtree is a TRINARY_ARG2.  */
 398   DEMANGLE_COMPONENT_TRINARY_ARG1,
 399   /* More arguments to a trinary expression.  The left subtree is the
 400      second argument, and the right subtree is the third argument.  */
 401   DEMANGLE_COMPONENT_TRINARY_ARG2,
 402   /* A literal.  The left subtree is the type, and the right subtree
 403      is the value, represented as a DEMANGLE_COMPONENT_NAME.  */
 404   DEMANGLE_COMPONENT_LITERAL,
 405   /* A negative literal.  Like LITERAL, but the value is negated.
 406      This is a minor hack: the NAME used for LITERAL points directly
 407      to the mangled string, but since negative numbers are mangled
 408      using 'n' instead of '-', we want a way to indicate a negative
 409      number which involves neither modifying the mangled string nor
 410      allocating a new copy of the literal in memory.  */
 411   DEMANGLE_COMPONENT_LITERAL_NEG,
 412   /* A libgcj compiled resource.  The left subtree is the name of the
 413      resource.  */
 414   DEMANGLE_COMPONENT_JAVA_RESOURCE,
 415   /* A name formed by the concatenation of two parts.  The left
 416      subtree is the first part and the right subtree the second.  */
 417   DEMANGLE_COMPONENT_COMPOUND_NAME,
 418   /* A name formed by a single character.  */
 419   DEMANGLE_COMPONENT_CHARACTER,
 420   /* A number.  */
 421   DEMANGLE_COMPONENT_NUMBER,
 422   /* A decltype type.  */
 423   DEMANGLE_COMPONENT_DECLTYPE,
 424   /* Global constructors keyed to name.  */
 425   DEMANGLE_COMPONENT_GLOBAL_CONSTRUCTORS,
 426   /* Global destructors keyed to name.  */
 427   DEMANGLE_COMPONENT_GLOBAL_DESTRUCTORS,
 428   /* A lambda closure type.  */
 429   DEMANGLE_COMPONENT_LAMBDA,
 430   /* A default argument scope.  */
 431   DEMANGLE_COMPONENT_DEFAULT_ARG,
 432   /* An unnamed type.  */
 433   DEMANGLE_COMPONENT_UNNAMED_TYPE,
 434   /* A transactional clone.  This has one subtree, the encoding for
 435      which it is providing alternative linkage.  */
 436   DEMANGLE_COMPONENT_TRANSACTION_CLONE,
 437   /* A non-transactional clone entry point.  In the i386/x86_64 abi,
 438      the unmangled symbol of a tm_callable becomes a thunk and the
 439      non-transactional function version is mangled thus.  */
 440   DEMANGLE_COMPONENT_NONTRANSACTION_CLONE,
 441   /* A pack expansion.  */
 442   DEMANGLE_COMPONENT_PACK_EXPANSION,
 443   /* A name with an ABI tag.  */
 444   DEMANGLE_COMPONENT_TAGGED_NAME,
 445   /* A cloned function.  */
 446   DEMANGLE_COMPONENT_CLONE
 447 };
 448
 449 /* Types which are only used internally.  */
 450
 451 struct demangle_operator_info;
 452 struct demangle_builtin_type_info;
 453
 454 /* A node in the tree representation is an instance of a struct
 455    demangle_component.  Note that the field names of the struct are
 456    not well protected against macros defined by the file including
 457    this one.  We can fix this if it ever becomes a problem.  */
 458
 459 struct demangle_component
 460 {
 461   /* The type of this component.  */
 462   enum demangle_component_type type;
 463
 464   union
 465   {
 466     /* For DEMANGLE_COMPONENT_NAME.  */
 467     struct
 468     {
 469       /* A pointer to the name (which need not NULL terminated) and
 470          its length.  */
 471       const char *s;
 472       int len;
 473     } s_name;
 474
 475     /* For DEMANGLE_COMPONENT_OPERATOR.  */
 476     struct
 477     {
 478       /* Operator.  */
 479       const struct demangle_operator_info *op;
 480     } s_operator;
 481
 482     /* For DEMANGLE_COMPONENT_EXTENDED_OPERATOR.  */
 483     struct
 484     {
 485       /* Number of arguments.  */
 486       int args;
 487       /* Name.  */
 488       struct demangle_component *name;
 489     } s_extended_operator;
 490
 491     /* For DEMANGLE_COMPONENT_FIXED_TYPE.  */
 492     struct
 493     {
 494       /* The length, indicated by a C integer type name.  */
 495       struct demangle_component *length;
 496       /* _Accum or _Fract?  */
 497       short accum;
 498       /* Saturating or not?  */
 499       short sat;
 500     } s_fixed;
 501
 502     /* For DEMANGLE_COMPONENT_CTOR.  */
 503     struct
 504     {
 505       /* Kind of constructor.  */
 506       enum gnu_v3_ctor_kinds kind;
 507       /* Name.  */
 508       struct demangle_component *name;
 509     } s_ctor;
 510
 511     /* For DEMANGLE_COMPONENT_DTOR.  */
 512     struct
 513     {
 514       /* Kind of destructor.  */
 515       enum gnu_v3_dtor_kinds kind;
 516       /* Name.  */
 517       struct demangle_component *name;
 518     } s_dtor;
 519
 520     /* For DEMANGLE_COMPONENT_BUILTIN_TYPE.  */
 521     struct
 522     {
 523       /* Builtin type.  */
 524       const struct demangle_builtin_type_info *type;
 525     } s_builtin;
 526
 527     /* For DEMANGLE_COMPONENT_SUB_STD.  */
 528     struct
 529     {
 530       /* Standard substitution string.  */
 531       const char* string;
 532       /* Length of string.  */
 533       int len;
 534     } s_string;
 535
 536     /* For DEMANGLE_COMPONENT_*_PARAM.  */
 537     struct
 538     {
 539       /* Parameter index.  */
 540       long number;
 541     } s_number;
 542
 543     /* For DEMANGLE_COMPONENT_CHARACTER.  */
 544     struct
 545     {
 546       int character;
 547     } s_character;
 548
 549     /* For other types.  */
 550     struct
 551     {
 552       /* Left (or only) subtree.  */
 553       struct demangle_component *left;
 554       /* Right subtree.  */
 555       struct demangle_component *right;
 556     } s_binary;
 557
 558     struct
 559     {
 560       /* subtree, same place as d_left.  */
 561       struct demangle_component *sub;
 562       /* integer.  */
 563       int num;
 564     } s_unary_num;
 565
 566   } u;
 567 };
 568
 569 /* People building mangled trees are expected to allocate instances of
 570    struct demangle_component themselves.  They can then call one of
 571    the following functions to fill them in.  */
 572
 573 /* Fill in most component types with a left subtree and a right
 574    subtree.  Returns non-zero on success, zero on failure, such as an
 575    unrecognized or inappropriate component type.  */
 576
 577 extern int
 578 cplus_demangle_fill_component (struct demangle_component *fill,
 579                                enum demangle_component_type,
 580                                struct demangle_component *left,
 581                                struct demangle_component *right);
 582
 583 /* Fill in a DEMANGLE_COMPONENT_NAME.  Returns non-zero on success,
 584    zero for bad arguments.  */
 585
 586 extern int
 587 cplus_demangle_fill_name (struct demangle_component *fill,
 588                           const char *, int);
 589
 590 /* Fill in a DEMANGLE_COMPONENT_BUILTIN_TYPE, using the name of the
 591    builtin type (e.g., "int", etc.).  Returns non-zero on success,
 592    zero if the type is not recognized.  */
 593
 594 extern int
 595 cplus_demangle_fill_builtin_type (struct demangle_component *fill,
 596                                   const char *type_name);
 597
 598 /* Fill in a DEMANGLE_COMPONENT_OPERATOR, using the name of the
 599    operator and the number of arguments which it takes (the latter is
 600    used to disambiguate operators which can be both binary and unary,
 601    such as '-').  Returns non-zero on success, zero if the operator is
 602    not recognized.  */
 603
 604 extern int
 605 cplus_demangle_fill_operator (struct demangle_component *fill,
 606                               const char *opname, int args);
 607
 608 /* Fill in a DEMANGLE_COMPONENT_EXTENDED_OPERATOR, providing the
 609    number of arguments and the name.  Returns non-zero on success,
 610    zero for bad arguments.  */
 611
 612 extern int
 613 cplus_demangle_fill_extended_operator (struct demangle_component *fill,
 614                                        int numargs,
 615                                        struct demangle_component *nm);
 616
 617 /* Fill in a DEMANGLE_COMPONENT_CTOR.  Returns non-zero on success,
 618    zero for bad arguments.  */
 619
 620 extern int
 621 cplus_demangle_fill_ctor (struct demangle_component *fill,
 622                           enum gnu_v3_ctor_kinds kind,
 623                           struct demangle_component *name);
 624
 625 /* Fill in a DEMANGLE_COMPONENT_DTOR.  Returns non-zero on success,
 626    zero for bad arguments.  */
 627
 628 extern int
 629 cplus_demangle_fill_dtor (struct demangle_component *fill,
 630                           enum gnu_v3_dtor_kinds kind,
 631                           struct demangle_component *name);
 632
 633 /* This function translates a mangled name into a struct
 634    demangle_component tree.  The first argument is the mangled name.
 635    The second argument is DMGL_* options.  This returns a pointer to a
 636    tree on success, or NULL on failure.  On success, the third
 637    argument is set to a block of memory allocated by malloc.  This
 638    block should be passed to free when the tree is no longer
 639    needed.  */
 640
 641 extern struct demangle_component *
 642 cplus_demangle_v3_components (const char *mangled, int options, void **mem);
 643
 644 /* This function takes a struct demangle_component tree and returns
 645    the corresponding demangled string.  The first argument is DMGL_*
 646    options.  The second is the tree to demangle.  The third is a guess
 647    at the length of the demangled string, used to initially allocate
 648    the return buffer.  The fourth is a pointer to a size_t.  On
 649    success, this function returns a buffer allocated by malloc(), and
 650    sets the size_t pointed to by the fourth argument to the size of
 651    the allocated buffer (not the length of the returned string).  On
 652    failure, this function returns NULL, and sets the size_t pointed to
 653    by the fourth argument to 0 for an invalid tree, or to 1 for a
 654    memory allocation error.  */
 655
 656 extern char *
 657 cplus_demangle_print (int options,
 658                       const struct demangle_component *tree,
 659                       int estimated_length,
 660                       size_t *p_allocated_size);
 661
 662 /* This function takes a struct demangle_component tree and passes back
 663    a demangled string in one or more calls to a callback function.
 664    The first argument is DMGL_* options.  The second is the tree to
 665    demangle.  The third is a pointer to a callback function; on each call
 666    this receives an element of the demangled string, its length, and an
 667    opaque value.  The fourth is the opaque value passed to the callback.
 668    The callback is called once or more to return the full demangled
 669    string.  The demangled element string is always nul-terminated, though
 670    its length is also provided for convenience.  In contrast to
 671    cplus_demangle_print(), this function does not allocate heap memory
 672    to grow output strings (except perhaps where alloca() is implemented
 673    by malloc()), and so is normally safe for use where the heap has been
 674    corrupted.  On success, this function returns 1; on failure, 0.  */
 675
 676 extern int
 677 cplus_demangle_print_callback (int options,
 678                                const struct demangle_component *tree,
 679                                demangle_callbackref callback, void *opaque);
 680
 681 #ifdef __cplusplus
 682 }
 683 #endif /* __cplusplus */
 684
 685 #endif  /* DEMANGLE_H */