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binutils-gdb/include/demangle.h

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/* Defs for interface to demanglers.
Copyright (C) 1992-2021 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License
as published by the Free Software Foundation; either version 2, or
(at your option) any later version.
In addition to the permissions in the GNU Library General Public
License, the Free Software Foundation gives you unlimited
permission to link the compiled version of this file into
combinations with other programs, and to distribute those
combinations without any restriction coming from the use of this
file. (The Library Public License restrictions do apply in other
respects; for example, they cover modification of the file, and
distribution when not linked into a combined executable.)
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#if !defined (DEMANGLE_H)
#define DEMANGLE_H
#include "libiberty.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* Options passed to cplus_demangle (in 2nd parameter). */
#define DMGL_NO_OPTS 0 /* For readability... */
#define DMGL_PARAMS (1 << 0) /* Include function args */
#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
#define DMGL_JAVA (1 << 2) /* Demangle as Java rather than C++. */
#define DMGL_VERBOSE (1 << 3) /* Include implementation details. */
#define DMGL_TYPES (1 << 4) /* Also try to demangle type encodings. */
#define DMGL_RET_POSTFIX (1 << 5) /* Print function return types (when
present) after function signature.
It applies only to the toplevel
function type. */
#define DMGL_RET_DROP (1 << 6) /* Suppress printing function return
types, even if present. It applies
only to the toplevel function type.
*/
#define DMGL_AUTO (1 << 8)
#define DMGL_GNU_V3 (1 << 14)
#define DMGL_GNAT (1 << 15)
#define DMGL_DLANG (1 << 16)
#define DMGL_RUST (1 << 17) /* Rust wraps GNU_V3 style mangling. */
/* If none of these are set, use 'current_demangling_style' as the default. */
#define DMGL_STYLE_MASK (DMGL_AUTO|DMGL_GNU_V3|DMGL_JAVA|DMGL_GNAT|DMGL_DLANG|DMGL_RUST)
/* Disable a limit on the depth of recursion in mangled strings.
Note if this limit is disabled then stack exhaustion is possible when
demangling pathologically complicated strings. Bug reports about stack
exhaustion when the option is enabled will be rejected. */
#define DMGL_NO_RECURSE_LIMIT (1 << 18)
/* If DMGL_NO_RECURSE_LIMIT is not enabled, then this is the value used as
the maximum depth of recursion allowed. It should be enough for any
real-world mangled name. */
#define DEMANGLE_RECURSION_LIMIT 2048
/* Enumeration of possible demangling styles.
Lucid and ARM styles are still kept logically distinct, even though
they now both behave identically. The resulting style is actual the
union of both. I.E. either style recognizes both "__pt__" and "__rf__"
for operator "->", even though the first is lucid style and the second
is ARM style. (FIXME?) */
extern enum demangling_styles
{
no_demangling = -1,
unknown_demangling = 0,
auto_demangling = DMGL_AUTO,
gnu_v3_demangling = DMGL_GNU_V3,
java_demangling = DMGL_JAVA,
gnat_demangling = DMGL_GNAT,
dlang_demangling = DMGL_DLANG,
rust_demangling = DMGL_RUST
} current_demangling_style;
/* Define string names for the various demangling styles. */
#define NO_DEMANGLING_STYLE_STRING "none"
#define AUTO_DEMANGLING_STYLE_STRING "auto"
#define GNU_V3_DEMANGLING_STYLE_STRING "gnu-v3"
#define JAVA_DEMANGLING_STYLE_STRING "java"
#define GNAT_DEMANGLING_STYLE_STRING "gnat"
#define DLANG_DEMANGLING_STYLE_STRING "dlang"
#define RUST_DEMANGLING_STYLE_STRING "rust"
/* Some macros to test what demangling style is active. */
#define CURRENT_DEMANGLING_STYLE current_demangling_style
#define AUTO_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_AUTO)
#define GNU_V3_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNU_V3)
#define JAVA_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_JAVA)
#define GNAT_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_GNAT)
#define DLANG_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_DLANG)
#define RUST_DEMANGLING (((int) CURRENT_DEMANGLING_STYLE) & DMGL_RUST)
/* Provide information about the available demangle styles. This code is
pulled from gdb into libiberty because it is useful to binutils also. */
extern const struct demangler_engine
{
const char *const demangling_style_name;
const enum demangling_styles demangling_style;
const char *const demangling_style_doc;
} libiberty_demanglers[];
extern char *
cplus_demangle (const char *mangled, int options);
/* Note: This sets global state. FIXME if you care about multi-threading. */
extern enum demangling_styles
cplus_demangle_set_style (enum demangling_styles style);
extern enum demangling_styles
cplus_demangle_name_to_style (const char *name);
/* Callback typedef for allocation-less demangler interfaces. */
typedef void (*demangle_callbackref) (const char *, size_t, void *);
/* V3 ABI demangling entry points, defined in cp-demangle.c. Callback
variants return non-zero on success, zero on error. char* variants
return a string allocated by malloc on success, NULL on error. */
extern int
cplus_demangle_v3_callback (const char *mangled, int options,
demangle_callbackref callback, void *opaque);
extern char*
cplus_demangle_v3 (const char *mangled, int options);
extern int
java_demangle_v3_callback (const char *mangled,
demangle_callbackref callback, void *opaque);
extern char*
java_demangle_v3 (const char *mangled);
char *
ada_demangle (const char *mangled, int options);
extern char *
dlang_demangle (const char *mangled, int options);
extern int
rust_demangle_callback (const char *mangled, int options,
demangle_callbackref callback, void *opaque);
extern char *
rust_demangle (const char *mangled, int options);
enum gnu_v3_ctor_kinds {
gnu_v3_complete_object_ctor = 1,
gnu_v3_base_object_ctor,
gnu_v3_complete_object_allocating_ctor,
/* These are not part of the V3 ABI. Unified constructors are generated
as a speed-for-space optimization when the -fdeclone-ctor-dtor option
is used, and are always internal symbols. */
gnu_v3_unified_ctor,
gnu_v3_object_ctor_group
};
/* Return non-zero iff NAME is the mangled form of a constructor name
in the G++ V3 ABI demangling style. Specifically, return an `enum
gnu_v3_ctor_kinds' value indicating what kind of constructor
it is. */
extern enum gnu_v3_ctor_kinds
is_gnu_v3_mangled_ctor (const char *name);
enum gnu_v3_dtor_kinds {
gnu_v3_deleting_dtor = 1,
gnu_v3_complete_object_dtor,
gnu_v3_base_object_dtor,
/* These are not part of the V3 ABI. Unified destructors are generated
as a speed-for-space optimization when the -fdeclone-ctor-dtor option
is used, and are always internal symbols. */
gnu_v3_unified_dtor,
gnu_v3_object_dtor_group
};
/* Return non-zero iff NAME is the mangled form of a destructor name
in the G++ V3 ABI demangling style. Specifically, return an `enum
gnu_v3_dtor_kinds' value, indicating what kind of destructor
it is. */
extern enum gnu_v3_dtor_kinds
is_gnu_v3_mangled_dtor (const char *name);
/* The V3 demangler works in two passes. The first pass builds a tree
representation of the mangled name, and the second pass turns the
tree representation into a demangled string. Here we define an
interface to permit a caller to build their own tree
representation, which they can pass to the demangler to get a
demangled string. This can be used to canonicalize user input into
something which the demangler might output. It could also be used
by other demanglers in the future. */
/* These are the component types which may be found in the tree. Many
component types have one or two subtrees, referred to as left and
right (a component type with only one subtree puts it in the left
subtree). */
enum demangle_component_type
{
/* A name, with a length and a pointer to a string. */
DEMANGLE_COMPONENT_NAME,
/* A qualified name. The left subtree is a class or namespace or
some such thing, and the right subtree is a name qualified by
that class. */
DEMANGLE_COMPONENT_QUAL_NAME,
/* A local name. The left subtree describes a function, and the
right subtree is a name which is local to that function. */
DEMANGLE_COMPONENT_LOCAL_NAME,
/* A typed name. The left subtree is a name, and the right subtree
describes that name as a function. */
DEMANGLE_COMPONENT_TYPED_NAME,
/* A template. The left subtree is a template name, and the right
subtree is a template argument list. */
DEMANGLE_COMPONENT_TEMPLATE,
/* A template parameter. This holds a number, which is the template
parameter index. */
DEMANGLE_COMPONENT_TEMPLATE_PARAM,
/* A function parameter. This holds a number, which is the index. */
DEMANGLE_COMPONENT_FUNCTION_PARAM,
/* A constructor. This holds a name and the kind of
constructor. */
DEMANGLE_COMPONENT_CTOR,
/* A destructor. This holds a name and the kind of destructor. */
DEMANGLE_COMPONENT_DTOR,
/* A vtable. This has one subtree, the type for which this is a
vtable. */
DEMANGLE_COMPONENT_VTABLE,
/* A VTT structure. This has one subtree, the type for which this
is a VTT. */
DEMANGLE_COMPONENT_VTT,
/* A construction vtable. The left subtree is the type for which
this is a vtable, and the right subtree is the derived type for
which this vtable is built. */
DEMANGLE_COMPONENT_CONSTRUCTION_VTABLE,
/* A typeinfo structure. This has one subtree, the type for which
this is the tpeinfo structure. */
DEMANGLE_COMPONENT_TYPEINFO,
/* A typeinfo name. This has one subtree, the type for which this
is the typeinfo name. */
DEMANGLE_COMPONENT_TYPEINFO_NAME,
/* A typeinfo function. This has one subtree, the type for which
this is the tpyeinfo function. */
DEMANGLE_COMPONENT_TYPEINFO_FN,
/* A thunk. This has one subtree, the name for which this is a
thunk. */
DEMANGLE_COMPONENT_THUNK,
/* A virtual thunk. This has one subtree, the name for which this
is a virtual thunk. */
DEMANGLE_COMPONENT_VIRTUAL_THUNK,
/* A covariant thunk. This has one subtree, the name for which this
is a covariant thunk. */
DEMANGLE_COMPONENT_COVARIANT_THUNK,
/* A Java class. This has one subtree, the type. */
DEMANGLE_COMPONENT_JAVA_CLASS,
/* A guard variable. This has one subtree, the name for which this
is a guard variable. */
DEMANGLE_COMPONENT_GUARD,
/* The init and wrapper functions for C++11 thread_local variables. */
DEMANGLE_COMPONENT_TLS_INIT,
DEMANGLE_COMPONENT_TLS_WRAPPER,
/* A reference temporary. This has one subtree, the name for which
this is a temporary. */
DEMANGLE_COMPONENT_REFTEMP,
/* A hidden alias. This has one subtree, the encoding for which it
is providing alternative linkage. */
DEMANGLE_COMPONENT_HIDDEN_ALIAS,
/* A standard substitution. This holds the name of the
substitution. */
DEMANGLE_COMPONENT_SUB_STD,
/* The restrict qualifier. The one subtree is the type which is
being qualified. */
DEMANGLE_COMPONENT_RESTRICT,
/* The volatile qualifier. The one subtree is the type which is
being qualified. */
DEMANGLE_COMPONENT_VOLATILE,
/* The const qualifier. The one subtree is the type which is being
qualified. */
DEMANGLE_COMPONENT_CONST,
/* The restrict qualifier modifying a member function. The one
subtree is the type which is being qualified. */
DEMANGLE_COMPONENT_RESTRICT_THIS,
/* The volatile qualifier modifying a member function. The one
subtree is the type which is being qualified. */
DEMANGLE_COMPONENT_VOLATILE_THIS,
/* The const qualifier modifying a member function. The one subtree
is the type which is being qualified. */
DEMANGLE_COMPONENT_CONST_THIS,
/* C++11 A reference modifying a member function. The one subtree is the
type which is being referenced. */
DEMANGLE_COMPONENT_REFERENCE_THIS,
/* C++11: An rvalue reference modifying a member function. The one
subtree is the type which is being referenced. */
DEMANGLE_COMPONENT_RVALUE_REFERENCE_THIS,
/* A vendor qualifier. The left subtree is the type which is being
qualified, and the right subtree is the name of the
qualifier. */
DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL,
/* A pointer. The one subtree is the type which is being pointed
to. */
DEMANGLE_COMPONENT_POINTER,
/* A reference. The one subtree is the type which is being
referenced. */
DEMANGLE_COMPONENT_REFERENCE,
/* C++0x: An rvalue reference. The one subtree is the type which is
being referenced. */
DEMANGLE_COMPONENT_RVALUE_REFERENCE,
/* A complex type. The one subtree is the base type. */
DEMANGLE_COMPONENT_COMPLEX,
/* An imaginary type. The one subtree is the base type. */
DEMANGLE_COMPONENT_IMAGINARY,
/* A builtin type. This holds the builtin type information. */
DEMANGLE_COMPONENT_BUILTIN_TYPE,
/* A vendor's builtin type. This holds the name of the type. */
DEMANGLE_COMPONENT_VENDOR_TYPE,
/* A function type. The left subtree is the return type. The right
subtree is a list of ARGLIST nodes. Either or both may be
NULL. */
DEMANGLE_COMPONENT_FUNCTION_TYPE,
/* An array type. The left subtree is the dimension, which may be
NULL, or a string (represented as DEMANGLE_COMPONENT_NAME), or an
expression. The right subtree is the element type. */
DEMANGLE_COMPONENT_ARRAY_TYPE,
/* A pointer to member type. The left subtree is the class type,
and the right subtree is the member type. CV-qualifiers appear
on the latter. */
DEMANGLE_COMPONENT_PTRMEM_TYPE,
/* A fixed-point type. */
DEMANGLE_COMPONENT_FIXED_TYPE,
/* A vector type. The left subtree is the number of elements,
the right subtree is the element type. */
DEMANGLE_COMPONENT_VECTOR_TYPE,
/* An argument list. The left subtree is the current argument, and
the right subtree is either NULL or another ARGLIST node. */
DEMANGLE_COMPONENT_ARGLIST,
/* A template argument list. The left subtree is the current
template argument, and the right subtree is either NULL or
another TEMPLATE_ARGLIST node. */
DEMANGLE_COMPONENT_TEMPLATE_ARGLIST,
/* A template parameter object (C++20). The left subtree is the
corresponding template argument. */
DEMANGLE_COMPONENT_TPARM_OBJ,
/* An initializer list. The left subtree is either an explicit type or
NULL, and the right subtree is a DEMANGLE_COMPONENT_ARGLIST. */
DEMANGLE_COMPONENT_INITIALIZER_LIST,
/* An operator. This holds information about a standard
operator. */
DEMANGLE_COMPONENT_OPERATOR,
/* An extended operator. This holds the number of arguments, and
the name of the extended operator. */
DEMANGLE_COMPONENT_EXTENDED_OPERATOR,
/* A typecast, represented as a unary operator. The one subtree is
the type to which the argument should be cast. */
DEMANGLE_COMPONENT_CAST,
/* A conversion operator, represented as a unary operator. The one
subtree is the type to which the argument should be converted
to. */
DEMANGLE_COMPONENT_CONVERSION,
/* A nullary expression. The left subtree is the operator. */
DEMANGLE_COMPONENT_NULLARY,
/* A unary expression. The left subtree is the operator, and the
right subtree is the single argument. */
DEMANGLE_COMPONENT_UNARY,
/* A binary expression. The left subtree is the operator, and the
right subtree is a BINARY_ARGS. */
DEMANGLE_COMPONENT_BINARY,
/* Arguments to a binary expression. The left subtree is the first
argument, and the right subtree is the second argument. */
DEMANGLE_COMPONENT_BINARY_ARGS,
/* A trinary expression. The left subtree is the operator, and the
right subtree is a TRINARY_ARG1. */
DEMANGLE_COMPONENT_TRINARY,
/* Arguments to a trinary expression. The left subtree is the first
argument, and the right subtree is a TRINARY_ARG2. */
DEMANGLE_COMPONENT_TRINARY_ARG1,
/* More arguments to a trinary expression. The left subtree is the
second argument, and the right subtree is the third argument. */
DEMANGLE_COMPONENT_TRINARY_ARG2,
/* A literal. The left subtree is the type, and the right subtree
is the value, represented as a DEMANGLE_COMPONENT_NAME. */
DEMANGLE_COMPONENT_LITERAL,
/* A negative literal. Like LITERAL, but the value is negated.
This is a minor hack: the NAME used for LITERAL points directly
to the mangled string, but since negative numbers are mangled
using 'n' instead of '-', we want a way to indicate a negative
number which involves neither modifying the mangled string nor
allocating a new copy of the literal in memory. */
DEMANGLE_COMPONENT_LITERAL_NEG,
/* A libgcj compiled resource. The left subtree is the name of the
resource. */
DEMANGLE_COMPONENT_JAVA_RESOURCE,
/* A name formed by the concatenation of two parts. The left
subtree is the first part and the right subtree the second. */
DEMANGLE_COMPONENT_COMPOUND_NAME,
/* A name formed by a single character. */
DEMANGLE_COMPONENT_CHARACTER,
/* A number. */
DEMANGLE_COMPONENT_NUMBER,
/* A decltype type. */
DEMANGLE_COMPONENT_DECLTYPE,
/* Global constructors keyed to name. */
DEMANGLE_COMPONENT_GLOBAL_CONSTRUCTORS,
/* Global destructors keyed to name. */
DEMANGLE_COMPONENT_GLOBAL_DESTRUCTORS,
/* A lambda closure type. */
DEMANGLE_COMPONENT_LAMBDA,
/* A default argument scope. */
DEMANGLE_COMPONENT_DEFAULT_ARG,
/* An unnamed type. */
DEMANGLE_COMPONENT_UNNAMED_TYPE,
/* A transactional clone. This has one subtree, the encoding for
which it is providing alternative linkage. */
DEMANGLE_COMPONENT_TRANSACTION_CLONE,
/* A non-transactional clone entry point. In the i386/x86_64 abi,
the unmangled symbol of a tm_callable becomes a thunk and the
non-transactional function version is mangled thus. */
DEMANGLE_COMPONENT_NONTRANSACTION_CLONE,
/* A pack expansion. */
DEMANGLE_COMPONENT_PACK_EXPANSION,
/* A name with an ABI tag. */
DEMANGLE_COMPONENT_TAGGED_NAME,
/* A transaction-safe function type. */
DEMANGLE_COMPONENT_TRANSACTION_SAFE,
/* A cloned function. */
DEMANGLE_COMPONENT_CLONE,
DEMANGLE_COMPONENT_NOEXCEPT,
DEMANGLE_COMPONENT_THROW_SPEC
};
/* Types which are only used internally. */
struct demangle_operator_info;
struct demangle_builtin_type_info;
/* A node in the tree representation is an instance of a struct
demangle_component. Note that the field names of the struct are
not well protected against macros defined by the file including
this one. We can fix this if it ever becomes a problem. */
struct demangle_component
{
/* The type of this component. */
enum demangle_component_type type;
/* Guard against recursive component printing.
Initialize to zero. Private to d_print_comp.
All other fields are final after initialization. */
int d_printing;
int d_counting;
union
{
/* For DEMANGLE_COMPONENT_NAME. */
struct
{
/* A pointer to the name (which need not NULL terminated) and
its length. */
const char *s;
int len;
} s_name;
/* For DEMANGLE_COMPONENT_OPERATOR. */
struct
{
/* Operator. */
const struct demangle_operator_info *op;
} s_operator;
/* For DEMANGLE_COMPONENT_EXTENDED_OPERATOR. */
struct
{
/* Number of arguments. */
int args;
/* Name. */
struct demangle_component *name;
} s_extended_operator;
/* For DEMANGLE_COMPONENT_FIXED_TYPE. */
struct
{
/* The length, indicated by a C integer type name. */
struct demangle_component *length;
/* _Accum or _Fract? */
short accum;
/* Saturating or not? */
short sat;
} s_fixed;
/* For DEMANGLE_COMPONENT_CTOR. */
struct
{
/* Kind of constructor. */
enum gnu_v3_ctor_kinds kind;
/* Name. */
struct demangle_component *name;
} s_ctor;
/* For DEMANGLE_COMPONENT_DTOR. */
struct
{
/* Kind of destructor. */
enum gnu_v3_dtor_kinds kind;
/* Name. */
struct demangle_component *name;
} s_dtor;
/* For DEMANGLE_COMPONENT_BUILTIN_TYPE. */
struct
{
/* Builtin type. */
const struct demangle_builtin_type_info *type;
} s_builtin;
/* For DEMANGLE_COMPONENT_SUB_STD. */
struct
{
/* Standard substitution string. */
const char* string;
/* Length of string. */
int len;
} s_string;
/* For DEMANGLE_COMPONENT_*_PARAM. */
struct
{
/* Parameter index. */
long number;
} s_number;
/* For DEMANGLE_COMPONENT_CHARACTER. */
struct
{
int character;
} s_character;
/* For other types. */
struct
{
/* Left (or only) subtree. */
struct demangle_component *left;
/* Right subtree. */
struct demangle_component *right;
} s_binary;
struct
{
/* subtree, same place as d_left. */
struct demangle_component *sub;
/* integer. */
int num;
} s_unary_num;
} u;
};
/* People building mangled trees are expected to allocate instances of
struct demangle_component themselves. They can then call one of
the following functions to fill them in. */
/* Fill in most component types with a left subtree and a right
subtree. Returns non-zero on success, zero on failure, such as an
unrecognized or inappropriate component type. */
extern int
cplus_demangle_fill_component (struct demangle_component *fill,
enum demangle_component_type,
struct demangle_component *left,
struct demangle_component *right);
/* Fill in a DEMANGLE_COMPONENT_NAME. Returns non-zero on success,
zero for bad arguments. */
extern int
cplus_demangle_fill_name (struct demangle_component *fill,
const char *, int);
/* Fill in a DEMANGLE_COMPONENT_BUILTIN_TYPE, using the name of the
builtin type (e.g., "int", etc.). Returns non-zero on success,
zero if the type is not recognized. */
extern int
cplus_demangle_fill_builtin_type (struct demangle_component *fill,
const char *type_name);
/* Fill in a DEMANGLE_COMPONENT_OPERATOR, using the name of the
operator and the number of arguments which it takes (the latter is
used to disambiguate operators which can be both binary and unary,
such as '-'). Returns non-zero on success, zero if the operator is
not recognized. */
extern int
cplus_demangle_fill_operator (struct demangle_component *fill,
const char *opname, int args);
/* Fill in a DEMANGLE_COMPONENT_EXTENDED_OPERATOR, providing the
number of arguments and the name. Returns non-zero on success,
zero for bad arguments. */
extern int
cplus_demangle_fill_extended_operator (struct demangle_component *fill,
int numargs,
struct demangle_component *nm);
/* Fill in a DEMANGLE_COMPONENT_CTOR. Returns non-zero on success,
zero for bad arguments. */
extern int
cplus_demangle_fill_ctor (struct demangle_component *fill,
enum gnu_v3_ctor_kinds kind,
struct demangle_component *name);
/* Fill in a DEMANGLE_COMPONENT_DTOR. Returns non-zero on success,
zero for bad arguments. */
extern int
cplus_demangle_fill_dtor (struct demangle_component *fill,
enum gnu_v3_dtor_kinds kind,
struct demangle_component *name);
/* This function translates a mangled name into a struct
demangle_component tree. The first argument is the mangled name.
The second argument is DMGL_* options. This returns a pointer to a
tree on success, or NULL on failure. On success, the third
argument is set to a block of memory allocated by malloc. This
block should be passed to free when the tree is no longer
needed. */
extern struct demangle_component *
cplus_demangle_v3_components (const char *mangled, int options, void **mem);
/* This function takes a struct demangle_component tree and returns
the corresponding demangled string. The first argument is DMGL_*
options. The second is the tree to demangle. The third is a guess
at the length of the demangled string, used to initially allocate
the return buffer. The fourth is a pointer to a size_t. On
success, this function returns a buffer allocated by malloc(), and
sets the size_t pointed to by the fourth argument to the size of
the allocated buffer (not the length of the returned string). On
failure, this function returns NULL, and sets the size_t pointed to
by the fourth argument to 0 for an invalid tree, or to 1 for a
memory allocation error. */
extern char *
cplus_demangle_print (int options,
struct demangle_component *tree,
int estimated_length,
size_t *p_allocated_size);
/* This function takes a struct demangle_component tree and passes back
a demangled string in one or more calls to a callback function.
The first argument is DMGL_* options. The second is the tree to
demangle. The third is a pointer to a callback function; on each call
this receives an element of the demangled string, its length, and an
opaque value. The fourth is the opaque value passed to the callback.
The callback is called once or more to return the full demangled
string. The demangled element string is always nul-terminated, though
its length is also provided for convenience. In contrast to
cplus_demangle_print(), this function does not allocate heap memory
to grow output strings (except perhaps where alloca() is implemented
by malloc()), and so is normally safe for use where the heap has been
corrupted. On success, this function returns 1; on failure, 0. */
extern int
cplus_demangle_print_callback (int options,
struct demangle_component *tree,
demangle_callbackref callback, void *opaque);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* DEMANGLE_H */
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