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freebsd-skq/contrib/binutils/libiberty/cp-demangle.c
David E. O'Brien 98c12ca6b6 Import of GNU Binutils version 2.10.1. 
Believe it or not, this is heavily stripped down.
2000-11-15 20:52:56 +00:00

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/* Demangler for IA64 / g++ standard C++ ABI.
Copyright (C) 2000 CodeSourcery LLC.
Written by Alex Samuel <samuel@codesourcery.com>.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* This file implements demangling of C++ names mangled according to
the IA64 / g++ standard C++ ABI. Use the cp_demangle function to
demangle a mangled name, or compile with the preprocessor macro
STANDALONE_DEMANGLER defined to create a demangling filter
executable. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <stdio.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "ansidecl.h"
#include "libiberty.h"
#include "dyn-string.h"
#include "demangle.h"
/* If CP_DEMANGLE_DEBUG is defined, a trace of the grammar evaluation,
and other debugging output, will be generated. */
#ifdef CP_DEMANGLE_DEBUG
#define DEMANGLE_TRACE(PRODUCTION, DM) \
fprintf (stderr, " -> %-24s at position %3d\n", \
(PRODUCTION), current_position (DM));
#else
#define DEMANGLE_TRACE(PRODUCTION, DM)
#endif
/* Don't include <ctype.h>, to prevent additional unresolved symbols
from being dragged into the C++ runtime library. */
#define IS_DIGIT(CHAR) ((CHAR) >= '0' && (CHAR) <= '9')
#define IS_ALPHA(CHAR) \
(((CHAR) >= 'a' && (CHAR) <= 'z') \
|| ((CHAR) >= 'A' && (CHAR) <= 'Z'))
/* If flag_verbose is zero, some simplifications will be made to the
output to make it easier to read and supress details that are
generally not of interest to the average C++ programmer.
Otherwise, the demangled representation will attempt to convey as
much information as the mangled form. */
static int flag_verbose;
/* If flag_strict is non-zero, demangle strictly according to the
specification -- don't demangle special g++ manglings. */
static int flag_strict;
/* String_list_t is an extended form of dyn_string_t which provides a link
field. A string_list_t may safely be cast to and used as a
dyn_string_t. */
struct string_list_def
{
struct dyn_string string;
struct string_list_def *next;
};
typedef struct string_list_def *string_list_t;
/* Data structure representing a potential substitution. */
struct substitution_def
{
/* The demangled text of the substitution. */
dyn_string_t text;
/* The template parameter that this represents, indexed from zero.
If this is not a template paramter number, the value is
NOT_TEMPLATE_PARM. */
int template_parm_number;
/* Whether this substitution represents a template item. */
int template_p : 1;
};
#define NOT_TEMPLATE_PARM (-1)
/* Data structure representing a template argument list. */
struct template_arg_list_def
{
/* The next (lower) template argument list in the stack of currently
active template arguments. */
struct template_arg_list_def *next;
/* The first element in the list of template arguments in
left-to-right order. */
string_list_t first_argument;
/* The last element in the arguments lists. */
string_list_t last_argument;
};
typedef struct template_arg_list_def *template_arg_list_t;
/* Data structure to maintain the state of the current demangling. */
struct demangling_def
{
/* The full mangled name being mangled. */
const char *name;
/* Pointer into name at the current position. */
const char *next;
/* Stack for strings containing demangled result generated so far.
Text is emitted to the topmost (first) string. */
string_list_t result;
/* The number of presently available substitutions. */
int num_substitutions;
/* The allocated size of the substitutions array. */
int substitutions_allocated;
/* An array of available substitutions. The number of elements in
the array is given by num_substitions, and the allocated array
size in substitutions_size.
The most recent substition is at the end, so
- `S_' corresponds to substititutions[num_substitutions - 1]
- `S0_' corresponds to substititutions[num_substitutions - 2]
etc. */
struct substitution_def *substitutions;
/* The stack of template argument lists. */
template_arg_list_t template_arg_lists;
/* The most recently demangled source-name. */
dyn_string_t last_source_name;
};
typedef struct demangling_def *demangling_t;
/* This type is the standard return code from most functions. Values
other than STATUS_OK contain descriptive messages. */
typedef const char *status_t;
/* Special values that can be used as a status_t. */
#define STATUS_OK NULL
#define STATUS_ERROR "Error."
#define STATUS_UNIMPLEMENTED "Unimplemented."
#define STATUS_INTERNAL_ERROR "Internal error."
/* This status code indicates a failure in malloc or realloc. */
static const char* const status_allocation_failed = "Allocation failed.";
#define STATUS_ALLOCATION_FAILED status_allocation_failed
/* Non-zero if STATUS indicates that no error has occurred. */
#define STATUS_NO_ERROR(STATUS) ((STATUS) == STATUS_OK)
/* Evaluate EXPR, which must produce a status_t. If the status code
indicates an error, return from the current function with that
status code. */
#define RETURN_IF_ERROR(EXPR) \
do \
{ \
status_t s = EXPR; \
if (!STATUS_NO_ERROR (s)) \
return s; \
} \
while (0)
static status_t int_to_dyn_string
PARAMS ((int, dyn_string_t));
static string_list_t string_list_new
PARAMS ((int));
static void string_list_delete
PARAMS ((string_list_t));
static status_t result_close_template_list
PARAMS ((demangling_t));
static status_t result_push
PARAMS ((demangling_t));
static string_list_t result_pop
PARAMS ((demangling_t));
static int substitution_start
PARAMS ((demangling_t));
static status_t substitution_add
PARAMS ((demangling_t, int, int, int));
static dyn_string_t substitution_get
PARAMS ((demangling_t, int, int *));
#ifdef CP_DEMANGLE_DEBUG
static void substitutions_print
PARAMS ((demangling_t, FILE *));
#endif
static template_arg_list_t template_arg_list_new
PARAMS ((void));
static void template_arg_list_delete
PARAMS ((template_arg_list_t));
static void template_arg_list_add_arg
PARAMS ((template_arg_list_t, string_list_t));
static string_list_t template_arg_list_get_arg
PARAMS ((template_arg_list_t, int));
static void push_template_arg_list
PARAMS ((demangling_t, template_arg_list_t));
static void pop_to_template_arg_list
PARAMS ((demangling_t, template_arg_list_t));
#ifdef CP_DEMANGLE_DEBUG
static void template_arg_list_print
PARAMS ((template_arg_list_t, FILE *));
#endif
static template_arg_list_t current_template_arg_list
PARAMS ((demangling_t));
static demangling_t demangling_new
PARAMS ((const char *));
static void demangling_delete
PARAMS ((demangling_t));
/* The last character of DS. Warning: DS is evaluated twice. */
#define dyn_string_last_char(DS) \
(dyn_string_buf (DS)[dyn_string_length (DS) - 1])
/* Append a space character (` ') to DS if it does not already end
with one. Evaluates to 1 on success, or 0 on allocation failure. */
#define dyn_string_append_space(DS) \
((dyn_string_length (DS) > 0 \
&& dyn_string_last_char (DS) != ' ') \
? dyn_string_append_char ((DS), ' ') \
: 1)
/* Returns the index of the current position in the mangled name. */
#define current_position(DM) ((DM)->next - (DM)->name)
/* Returns the character at the current position of the mangled name. */
#define peek_char(DM) (*((DM)->next))
/* Returns the character one past the current position of the mangled
name. */
#define peek_char_next(DM) \
(peek_char (DM) == '\0' ? '\0' : (*((DM)->next + 1)))
/* Returns the character at the current position, and advances the
current position to the next character. */
#define next_char(DM) (*((DM)->next)++)
/* Returns non-zero if the current position is the end of the mangled
name, i.e. one past the last character. */
#define end_of_name_p(DM) (peek_char (DM) == '\0')
/* Advances the current position by one character. */
#define advance_char(DM) (++(DM)->next)
/* Returns the string containing the current demangled result. */
#define result_string(DM) (&(DM)->result->string)
/* Appends a dyn_string_t to the demangled result. */
#define result_append_string(DM, STRING) \
(dyn_string_append (&(DM)->result->string, (STRING)) \
? STATUS_OK : STATUS_ALLOCATION_FAILED)
/* Appends NUL-terminated string CSTR to the demangled result. */
#define result_append(DM, CSTR) \
(dyn_string_append_cstr (&(DM)->result->string, (CSTR)) \
? STATUS_OK : STATUS_ALLOCATION_FAILED)
/* Appends character CHAR to the demangled result. */
#define result_append_char(DM, CHAR) \
(dyn_string_append_char (&(DM)->result->string, (CHAR)) \
? STATUS_OK : STATUS_ALLOCATION_FAILED)
/* The length of the current demangled result. */
#define result_length(DM) \
dyn_string_length (&(DM)->result->string)
/* Appends a space to the demangled result if the last character is
not a space. */
#define result_append_space(DM) \
(dyn_string_append_space (&(DM)->result->string) \
? STATUS_OK : STATUS_ALLOCATION_FAILED)
/* Appends a base 10 representation of VALUE to DS. STATUS_OK on
success. On failure, deletes DS and returns an error code. */
static status_t
int_to_dyn_string (value, ds)
int value;
dyn_string_t ds;
{
int i;
int mask = 1;
/* Handle zero up front. */
if (value == 0)
{
if (!dyn_string_append_char (ds, '0'))
return STATUS_ALLOCATION_FAILED;
return STATUS_OK;
}
/* For negative numbers, emit a minus sign. */
if (value < 0)
{
if (!dyn_string_append_char (ds, '-'))
return STATUS_ALLOCATION_FAILED;
value = -value;
}
/* Find the power of 10 of the first digit. */
i = value;
while (i > 9)
{
mask *= 10;
i /= 10;
}
/* Write the digits. */
while (mask > 0)
{
int digit = value / mask;
if (!dyn_string_append_char (ds, '0' + digit))
return STATUS_ALLOCATION_FAILED;
value -= digit * mask;
mask /= 10;
}
return STATUS_OK;
}
/* Creates a new string list node. The contents of the string are
empty, but the initial buffer allocation is LENGTH. The string
list node should be deleted with string_list_delete. Returns NULL
if allocation fails. */
static string_list_t
string_list_new (length)
int length;
{
string_list_t s = (string_list_t) malloc (sizeof (struct string_list_def));
if (s == NULL)
return NULL;
if (!dyn_string_init ((dyn_string_t) s, length))
return NULL;
return s;
}
/* Deletes the entire string list starting at NODE. */
static void
string_list_delete (node)
string_list_t node;
{
while (node != NULL)
{
string_list_t next = node->next;
free (node);
node = next;
}
}
/* Appends a greater-than character to the demangled result. If the
last character is a greater-than character, a space is inserted
first, so that the two greater-than characters don't look like a
right shift token. */
static status_t
result_close_template_list (dm)
demangling_t dm;
{
dyn_string_t s = &dm->result->string;
/* Add a space if the last character is already a closing angle
bracket, so that a nested template arg list doesn't look like
it's closed with a right-shift operator. */
if (dyn_string_last_char (s) == '>')
{
if (!dyn_string_append_char (s, ' '))
return STATUS_ALLOCATION_FAILED;
}
/* Add closing angle brackets. */
if (!dyn_string_append_char (s, '>'))
return STATUS_ALLOCATION_FAILED;
return STATUS_OK;
}
/* Allocates and pushes a new string onto the demangled results stack
for DM. Subsequent demangling with DM will emit to the new string.
Returns STATUS_OK on success, STATUS_ALLOCATION_FAILED on
allocation failure. */
static status_t
result_push (dm)
demangling_t dm;
{
string_list_t new_string = string_list_new (0);
if (new_string == NULL)
/* Allocation failed. */
return STATUS_ALLOCATION_FAILED;
/* Link the new string to the front of the list of result strings. */
new_string->next = (string_list_t) dm->result;
dm->result = new_string;
return STATUS_OK;
}
/* Removes and returns the topmost element on the demangled results
stack for DM. The caller assumes ownership for the returned
string. */
static string_list_t
result_pop (dm)
demangling_t dm;
{
string_list_t top = dm->result;
dm->result = top->next;
return top;
}
/* Returns the start position of a fragment of the demangled result
that will be a substitution candidate. Should be called at the
start of productions that can add substitutions. */
static int
substitution_start (dm)
demangling_t dm;
{
return result_length (dm);
}
/* Adds the suffix of the current demangled result of DM starting at
START_POSITION as a potential substitution. If TEMPLATE_P is
non-zero, this potential substitution is a template-id.
If TEMPLATE_PARM_NUMBER is not NOT_TEMPLATE_PARM, the substitution
is for that particular <template-param>, and is distinct from other
otherwise-identical types and other <template-param>s with
different indices. */
static status_t
substitution_add (dm, start_position, template_p, template_parm_number)
demangling_t dm;
int start_position;
int template_p;
int template_parm_number;
{
dyn_string_t result = result_string (dm);
dyn_string_t substitution = dyn_string_new (0);
int i;
if (substitution == NULL)
return STATUS_ALLOCATION_FAILED;
/* Extract the substring of the current demangling result that
represents the subsitution candidate. */
if (!dyn_string_substring (substitution,
result, start_position, result_length (dm)))
{
dyn_string_delete (substitution);
return STATUS_ALLOCATION_FAILED;
}
/* Check whether SUBSTITUTION already occurs. */
for (i = 0; i < dm->num_substitutions; ++i)
if (dyn_string_eq (dm->substitutions[i].text, substitution)
&& dm->substitutions[i].template_parm_number == template_parm_number)
/* Found SUBSTITUTION already present. */
{
/* Callers expect this function to take ownership of
SUBSTITUTION, so delete it. */
dyn_string_delete (substitution);
return STATUS_OK;
}
/* If there's no room for the new entry, grow the array. */
if (dm->substitutions_allocated == dm->num_substitutions)
{
size_t new_array_size;
dm->substitutions_allocated *= 2;
new_array_size =
sizeof (struct substitution_def) * dm->substitutions_allocated;
dm->substitutions = (struct substitution_def *)
realloc (dm->substitutions, new_array_size);
if (dm->substitutions == NULL)
/* Realloc failed. */
{
dyn_string_delete (substitution);
return STATUS_ALLOCATION_FAILED;
}
}
/* Add the substitution to the array. */
dm->substitutions[i].text = substitution;
dm->substitutions[i].template_p = template_p;
dm->substitutions[i].template_parm_number = template_parm_number;
++dm->num_substitutions;
#ifdef CP_DEMANGLE_DEBUG
substitutions_print (dm, stderr);
#endif
return STATUS_OK;
}
/* Returns the Nth-most-recent substitution. Sets *TEMPLATE_P to
non-zero if the substitution is a template-id, zero otherwise.
N is numbered from zero. DM retains ownership of the returned
string. If N is negative, or equal to or greater than the current
number of substitution candidates, returns NULL. */
static dyn_string_t
substitution_get (dm, n, template_p)
demangling_t dm;
int n;
int *template_p;
{
struct substitution_def *sub;
/* Make sure N is in the valid range. */
if (n < 0 || n >= dm->num_substitutions)
return NULL;
sub = &(dm->substitutions[n]);
*template_p = sub->template_p;
return sub->text;
}
#ifdef CP_DEMANGLE_DEBUG
/* Debugging routine to print the current substitutions to FP. */
static void
substitutions_print (dm, fp)
demangling_t dm;
FILE *fp;
{
int seq_id;
int num = dm->num_substitutions;
fprintf (fp, "SUBSTITUTIONS:\n");
for (seq_id = -1; seq_id < num - 1; ++seq_id)
{
int template_p;
dyn_string_t text = substitution_get (dm, seq_id + 1, &template_p);
if (seq_id == -1)
fprintf (fp, " S_ ");
else
fprintf (fp, " S%d_", seq_id);
fprintf (fp, " %c: %s\n", template_p ? '*' : ' ', dyn_string_buf (text));
}
}
#endif /* CP_DEMANGLE_DEBUG */
/* Creates a new template argument list. Returns NULL if allocation
fails. */
static template_arg_list_t
template_arg_list_new ()
{
template_arg_list_t new_list =
(template_arg_list_t) malloc (sizeof (struct template_arg_list_def));
if (new_list == NULL)
return NULL;
/* Initialize the new list to have no arguments. */
new_list->first_argument = NULL;
new_list->last_argument = NULL;
/* Return the new list. */
return new_list;
}
/* Deletes a template argument list and the template arguments it
contains. */
static void
template_arg_list_delete (list)
template_arg_list_t list;
{
/* If there are any arguments on LIST, delete them. */
if (list->first_argument != NULL)
string_list_delete (list->first_argument);
/* Delete LIST. */
free (list);
}
/* Adds ARG to the template argument list ARG_LIST. */
static void
template_arg_list_add_arg (arg_list, arg)
template_arg_list_t arg_list;
string_list_t arg;
{
if (arg_list->first_argument == NULL)
/* If there were no arguments before, ARG is the first one. */
arg_list->first_argument = arg;
else
/* Make ARG the last argument on the list. */
arg_list->last_argument->next = arg;
/* Make ARG the last on the list. */
arg_list->last_argument = arg;
arg->next = NULL;
}
/* Returns the template arugment at position INDEX in template
argument list ARG_LIST. */
static string_list_t
template_arg_list_get_arg (arg_list, index)
template_arg_list_t arg_list;
int index;
{
string_list_t arg = arg_list->first_argument;
/* Scan down the list of arguments to find the one at position
INDEX. */
while (index--)
{
arg = arg->next;
if (arg == NULL)
/* Ran out of arguments before INDEX hit zero. That's an
error. */
return NULL;
}
/* Return the argument at position INDEX. */
return arg;
}
/* Pushes ARG_LIST onto the top of the template argument list stack. */
static void
push_template_arg_list (dm, arg_list)
demangling_t dm;
template_arg_list_t arg_list;
{
arg_list->next = dm->template_arg_lists;
dm->template_arg_lists = arg_list;
#ifdef CP_DEMANGLE_DEBUG
fprintf (stderr, " ** pushing template arg list\n");
template_arg_list_print (arg_list, stderr);
#endif
}
/* Pops and deletes elements on the template argument list stack until
arg_list is the topmost element. If arg_list is NULL, all elements
are popped and deleted. */
static void
pop_to_template_arg_list (dm, arg_list)
demangling_t dm;
template_arg_list_t arg_list;
{
while (dm->template_arg_lists != arg_list)
{
template_arg_list_t top = dm->template_arg_lists;
/* Disconnect the topmost element from the list. */
dm->template_arg_lists = top->next;
/* Delete the popped element. */
template_arg_list_delete (top);
#ifdef CP_DEMANGLE_DEBUG
fprintf (stderr, " ** removing template arg list\n");
#endif
}
}
#ifdef CP_DEMANGLE_DEBUG
/* Prints the contents of ARG_LIST to FP. */
static void
template_arg_list_print (arg_list, fp)
template_arg_list_t arg_list;
FILE *fp;
{
string_list_t arg;
int index = -1;
fprintf (fp, "TEMPLATE ARGUMENT LIST:\n");
for (arg = arg_list->first_argument; arg != NULL; arg = arg->next)
{
if (index == -1)
fprintf (fp, " T_ : ");
else
fprintf (fp, " T%d_ : ", index);
++index;
fprintf (fp, "%s\n", dyn_string_buf ((dyn_string_t) arg));
}
}
#endif /* CP_DEMANGLE_DEBUG */
/* Returns the topmost element on the stack of template argument
lists. If there is no list of template arguments, returns NULL. */
static template_arg_list_t
current_template_arg_list (dm)
demangling_t dm;
{
return dm->template_arg_lists;
}
/* Allocates a demangling_t object for demangling mangled NAME. A new
result must be pushed before the returned object can be used.
Returns NULL if allocation fails. */
static demangling_t
demangling_new (name)
const char *name;
{
demangling_t dm;
dm = (demangling_t) malloc (sizeof (struct demangling_def));
if (dm == NULL)
return NULL;
dm->name = name;
dm->next = name;
dm->result = NULL;
dm->num_substitutions = 0;
dm->substitutions_allocated = 10;
dm->template_arg_lists = NULL;
dm->last_source_name = dyn_string_new (0);
if (dm->last_source_name == NULL)
return NULL;
dm->substitutions = (struct substitution_def *)
malloc (dm->substitutions_allocated * sizeof (struct substitution_def));
if (dm->substitutions == NULL)
{
dyn_string_delete (dm->last_source_name);
return NULL;
}
return dm;
}
/* Deallocates a demangling_t object and all memory associated with
it. */
static void
demangling_delete (dm)
demangling_t dm;
{
int i;
template_arg_list_t arg_list = dm->template_arg_lists;
/* Delete the stack of template argument lists. */
while (arg_list != NULL)
{
template_arg_list_t next = arg_list->next;
template_arg_list_delete (arg_list);
arg_list = next;
}
/* Delete the list of substitutions. */
for (i = dm->num_substitutions; --i >= 0; )
dyn_string_delete (dm->substitutions[i].text);
free (dm->substitutions);
/* Delete the demangled result. */
string_list_delete (dm->result);
/* Delete the stored identifier name. */
dyn_string_delete (dm->last_source_name);
/* Delete the context object itself. */
free (dm);
}
/* These functions demangle an alternative of the corresponding
production in the mangling spec. The first argument of each is a
demangling context structure for the current demangling
operation. Most emit demangled text directly to the topmost result
string on the result string stack in the demangling context
structure. */
static status_t demangle_char
PARAMS ((demangling_t, int));
static status_t demangle_mangled_name
PARAMS ((demangling_t));
static status_t demangle_encoding
PARAMS ((demangling_t));
static status_t demangle_name
PARAMS ((demangling_t, int *));
static status_t demangle_nested_name
PARAMS ((demangling_t, int *));
static status_t demangle_prefix
PARAMS ((demangling_t, int *));
static status_t demangle_unqualified_name
PARAMS ((demangling_t));
static status_t demangle_source_name
PARAMS ((demangling_t));
static status_t demangle_number
PARAMS ((demangling_t, int *, int, int));
static status_t demangle_number_literally
PARAMS ((demangling_t, dyn_string_t, int, int));
static status_t demangle_identifier
PARAMS ((demangling_t, int, dyn_string_t));
static status_t demangle_operator_name
PARAMS ((demangling_t, int, int *));
static status_t demangle_special_name
PARAMS ((demangling_t));
static status_t demangle_ctor_dtor_name
PARAMS ((demangling_t));
static status_t demangle_type_ptr
PARAMS ((demangling_t));
static status_t demangle_type
PARAMS ((demangling_t));
static status_t demangle_CV_qualifiers
PARAMS ((demangling_t, dyn_string_t));
static status_t demangle_builtin_type
PARAMS ((demangling_t));
static status_t demangle_function_type
PARAMS ((demangling_t, int));
static status_t demangle_bare_function_type
PARAMS ((demangling_t, int));
static status_t demangle_class_enum_type
PARAMS ((demangling_t, int *));
static status_t demangle_array_type
PARAMS ((demangling_t));
static status_t demangle_template_param
PARAMS ((demangling_t, int *));
static status_t demangle_template_args
PARAMS ((demangling_t));
static status_t demangle_literal
PARAMS ((demangling_t));
static status_t demangle_template_arg
PARAMS ((demangling_t));
static status_t demangle_expression
PARAMS ((demangling_t));
static status_t demangle_scope_expression
PARAMS ((demangling_t));
static status_t demangle_expr_primary
PARAMS ((demangling_t));
static status_t demangle_substitution
PARAMS ((demangling_t, int *, int *));
static status_t demangle_local_name
PARAMS ((demangling_t));
static status_t demangle_discriminator
PARAMS ((demangling_t, int));
static status_t cp_demangle
PARAMS ((const char *, dyn_string_t));
static status_t cp_demangle_type
PARAMS ((const char*, dyn_string_t));
/* When passed to demangle_bare_function_type, indicates that the
function's return type is not encoded before its parameter types. */
#define BFT_NO_RETURN_TYPE -1
/* Check that the next character is C. If so, consume it. If not,
return an error. */
static status_t
demangle_char (dm, c)
demangling_t dm;
int c;
{
static char *error_message = NULL;
if (peek_char (dm) == c)
{
advance_char (dm);
return STATUS_OK;
}
else
{
if (error_message == NULL)
error_message = strdup ("Expected ?");
error_message[9] = c;
return error_message;
}
}
/* Demangles and emits a <mangled-name>.
<mangled-name> ::= _Z <encoding> */
static status_t
demangle_mangled_name (dm)
demangling_t dm;
{
DEMANGLE_TRACE ("mangled-name", dm);
RETURN_IF_ERROR (demangle_char (dm, '_'));
RETURN_IF_ERROR (demangle_char (dm, 'Z'));
RETURN_IF_ERROR (demangle_encoding (dm));
return STATUS_OK;
}
/* Demangles and emits an <encoding>.
<encoding> ::= <function name> <bare-function-type>
::= <data name>
::= <special-name> */
static status_t
demangle_encoding (dm)
demangling_t dm;
{
int template_p;
int start_position;
template_arg_list_t old_arg_list = current_template_arg_list (dm);
char peek = peek_char (dm);
DEMANGLE_TRACE ("encoding", dm);
/* Remember where the name starts. If it turns out to be a template
function, we'll have to insert the return type here. */
start_position = result_length (dm);
if (peek == 'G' || peek == 'T')
RETURN_IF_ERROR (demangle_special_name (dm));
else
{
/* Now demangle the name. */
RETURN_IF_ERROR (demangle_name (dm, &template_p));
/* If there's anything left, the name was a function name, with
maybe its return type, and its parameters types, following. */
if (!end_of_name_p (dm)
&& peek_char (dm) != 'E')
{
if (template_p)
/* Template functions have their return type encoded. The
return type should be inserted at start_position. */
RETURN_IF_ERROR
(demangle_bare_function_type (dm, start_position));
else
/* Non-template functions don't have their return type
encoded. */
RETURN_IF_ERROR
(demangle_bare_function_type (dm, BFT_NO_RETURN_TYPE));
}
}
/* Pop off template argument lists that were built during the
mangling of this name, to restore the old template context. */
pop_to_template_arg_list (dm, old_arg_list);
return STATUS_OK;
}
/* Demangles and emits a <name>.
<name> ::= <unscoped-name>
::= <unscoped-template-name> <template-args>
::= <nested-name>
::= <local-name>
<unscoped-name> ::= <unqualified-name>
::= St <unqualified-name> # ::std::
<unscoped-template-name>
::= <unscoped-name>
::= <substitution> */
static status_t
demangle_name (dm, template_p)
demangling_t dm;
int *template_p;
{
int special_std_substitution;
int start = substitution_start (dm);
DEMANGLE_TRACE ("name", dm);
switch (peek_char (dm))
{
case 'N':
/* This is a <nested-name>. */
RETURN_IF_ERROR (demangle_nested_name (dm, template_p));
break;
case 'Z':
RETURN_IF_ERROR (demangle_local_name (dm));
break;
case 'S':
/* The `St' substitution allows a name nested in std:: to appear
without being enclosed in a nested name. */
if (peek_char_next (dm) == 't')
{
(void) next_char (dm);
(void) next_char (dm);
RETURN_IF_ERROR (result_append (dm, "std::"));
RETURN_IF_ERROR (demangle_unqualified_name (dm));
}
else
{
RETURN_IF_ERROR (demangle_substitution (dm, template_p,
&special_std_substitution));
if (special_std_substitution)
{
/* This was the magic `std::' substitution. We can have
a <nested-name> or one of the unscoped names
following. */
RETURN_IF_ERROR (result_append (dm, "::"));
RETURN_IF_ERROR (demangle_name (dm, template_p));
}
}
/* Check if a template argument list immediately follows.
If so, then we just demangled an <unqualified-template-name>. */
if (peek_char (dm) == 'I')
{
RETURN_IF_ERROR (substitution_add (dm, start, 0,
NOT_TEMPLATE_PARM));
RETURN_IF_ERROR (demangle_template_args (dm));
}
break;
default:
/* This is an <unscoped-name> or <unscoped-template-name>. */
RETURN_IF_ERROR (demangle_unqualified_name (dm));
/* If the <unqualified-name> is followed by template args, this
is an <unscoped-template-name>. */
if (peek_char (dm) == 'I')
{
/* Add a substitution for the unqualified template name. */
RETURN_IF_ERROR (substitution_add (dm, start, 0,
NOT_TEMPLATE_PARM));
RETURN_IF_ERROR (demangle_template_args (dm));
*template_p = 1;
}
else
*template_p = 0;
break;
}
return STATUS_OK;
}
/* Demangles and emits a <nested-name>.
<nested-name> ::= N [<CV-qualifiers>] <prefix> <component> E */
static status_t
demangle_nested_name (dm, template_p)
demangling_t dm;
int *template_p;
{
char peek;
DEMANGLE_TRACE ("nested-name", dm);
RETURN_IF_ERROR (demangle_char (dm, 'N'));
peek = peek_char (dm);
if (peek == 'r' || peek == 'V' || peek == 'K')
{
status_t status;
/* Snarf up and emit CV qualifiers. */
dyn_string_t cv_qualifiers = dyn_string_new (24);
if (cv_qualifiers == NULL)
return STATUS_ALLOCATION_FAILED;
demangle_CV_qualifiers (dm, cv_qualifiers);
status = result_append_string (dm, cv_qualifiers);
dyn_string_delete (cv_qualifiers);
RETURN_IF_ERROR (status);
RETURN_IF_ERROR (result_append_space (dm));
}
RETURN_IF_ERROR (demangle_prefix (dm, template_p));
/* No need to demangle the final <component>; demangle_prefix will
handle it. */
RETURN_IF_ERROR (demangle_char (dm, 'E'));
return STATUS_OK;
}
/* Demangles and emits a <prefix>.
<prefix> ::= <prefix> <component>
::= <template-prefix> <template-args>
::= # empty
::= <substitution>
<template-prefix> ::= <prefix>
::= <substitution>
<component> ::= <unqualified-name>
::= <local-name> */
static status_t
demangle_prefix (dm, template_p)
demangling_t dm;
int *template_p;
{
int start = substitution_start (dm);
int nested = 0;
/* TEMPLATE_P is updated as we decend the nesting chain. After
<template-args>, it is set to non-zero; after everything else it
is set to zero. */
DEMANGLE_TRACE ("prefix", dm);
while (1)
{
char peek;
int unused;
if (end_of_name_p (dm))
return "Unexpected end of name in <compound-name>.";
peek = peek_char (dm);
if (IS_DIGIT ((unsigned char) peek)
|| (peek >= 'a' && peek <= 'z')
|| peek == 'C' || peek == 'D'
|| peek == 'S')
{
/* We have another level of scope qualification. */
if (nested)
RETURN_IF_ERROR (result_append (dm, "::"));
else
nested = 1;
if (peek == 'S')
/* The substitution determines whether this is a
template-id. */
RETURN_IF_ERROR (demangle_substitution (dm, template_p,
&unused));
else
{
RETURN_IF_ERROR (demangle_unqualified_name (dm));
*template_p = 0;
}
}
else if (peek == 'Z')
RETURN_IF_ERROR (demangle_local_name (dm));
else if (peek == 'I')
{
if (*template_p)
return STATUS_INTERNAL_ERROR;
/* The template name is a substitution candidate. */
RETURN_IF_ERROR (substitution_add (dm, start, 0, NOT_TEMPLATE_PARM));
RETURN_IF_ERROR (demangle_template_args (dm));
*template_p = 1;
}
else if (peek == 'E')
/* All done. */
return STATUS_OK;
else
return "Unexpected character in <compound-name>.";
/* Add a new substitution for the prefix thus far. */
RETURN_IF_ERROR (substitution_add (dm, start, *template_p,
NOT_TEMPLATE_PARM));
}
}
/* Demangles and emits an <unqualified-name>. If the
<unqualified-name> is a function and the first element in the
argument list should be taken to be its return type,
ENCODE_RETURN_TYPE is non-zero.
<unqualified-name> ::= <operator-name>
::= <special-name>
::= <source-name> */
static status_t
demangle_unqualified_name (dm)
demangling_t dm;
{
char peek = peek_char (dm);
DEMANGLE_TRACE ("unqualified-name", dm);
if (IS_DIGIT ((unsigned char) peek))
RETURN_IF_ERROR (demangle_source_name (dm));
else if (peek >= 'a' && peek <= 'z')
{
int num_args;
RETURN_IF_ERROR (demangle_operator_name (dm, 0, &num_args));
}
else if (peek == 'C' || peek == 'D')
RETURN_IF_ERROR (demangle_ctor_dtor_name (dm));
else
return "Unexpected character in <unqualified-name>.";
return STATUS_OK;
}
/* Demangles and emits <source-name>.
<source-name> ::= <length number> <identifier> */
static status_t
demangle_source_name (dm)
demangling_t dm;
{
int length;
DEMANGLE_TRACE ("source-name", dm);
/* Decode the length of the identifier. */
RETURN_IF_ERROR (demangle_number (dm, &length, 10, 0));
if (length == 0)
return "Zero length in <source-name>.";
/* Now the identifier itself. It's placed into last_source_name,
where it can be used to build a constructor or destructor name. */
RETURN_IF_ERROR (demangle_identifier (dm, length,
dm->last_source_name));
/* Emit it. */
RETURN_IF_ERROR (result_append_string (dm, dm->last_source_name));
return STATUS_OK;
}
/* Demangles a number, either a <number> or a <positive-number> at the
current position, consuming all consecutive digit characters. Sets
*VALUE to the resulting numberand returns STATUS_OK. The number is
interpreted as BASE, which must be either 10 or 36. If IS_SIGNED
is non-zero, negative numbers -- prefixed with `n' -- are accepted.
<number> ::= [n] <positive-number>
<positive-number> ::= <decimal integer> */
static status_t
demangle_number (dm, value, base, is_signed)
demangling_t dm;
int *value;
int base;
int is_signed;
{
dyn_string_t number = dyn_string_new (10);
DEMANGLE_TRACE ("number", dm);
if (number == NULL)
return STATUS_ALLOCATION_FAILED;
demangle_number_literally (dm, number, base, is_signed);
*value = strtol (dyn_string_buf (number), NULL, base);
dyn_string_delete (number);
return STATUS_OK;
}
/* Demangles a number at the current position. The digits (and minus
sign, if present) that make up the number are appended to STR.
Only base-BASE digits are accepted; BASE must be either 10 or 36.
If IS_SIGNED, negative numbers -- prefixed with `n' -- are
accepted. Does not consume a trailing underscore or other
terminating character. */
static status_t
demangle_number_literally (dm, str, base, is_signed)
demangling_t dm;
dyn_string_t str;
int base;
int is_signed;
{
DEMANGLE_TRACE ("number*", dm);
if (base != 10 && base != 36)
return STATUS_INTERNAL_ERROR;
/* An `n' denotes a negative number. */
if (is_signed && peek_char (dm) == 'n')
{
/* Skip past the n. */
advance_char (dm);
/* The normal way to write a negative number is with a minus
sign. */
if (!dyn_string_append_char (str, '-'))
return STATUS_ALLOCATION_FAILED;
}
/* Loop until we hit a non-digit. */
while (1)
{
char peek = peek_char (dm);
if (IS_DIGIT ((unsigned char) peek)
|| (base == 36 && peek >= 'A' && peek <= 'Z'))
{
/* Accumulate digits. */
if (!dyn_string_append_char (str, next_char (dm)))
return STATUS_ALLOCATION_FAILED;
}
else
/* Not a digit? All done. */
break;
}
return STATUS_OK;
}
/* Demangles an identifier at the current position of LENGTH
characters and places it in IDENTIFIER. */
static status_t
demangle_identifier (dm, length, identifier)
demangling_t dm;
int length;
dyn_string_t identifier;
{
DEMANGLE_TRACE ("identifier", dm);
dyn_string_clear (identifier);
if (!dyn_string_resize (identifier, length))
return STATUS_ALLOCATION_FAILED;
while (length-- > 0)
{
if (end_of_name_p (dm))
return "Unexpected end of name in <identifier>.";
if (!dyn_string_append_char (identifier, next_char (dm)))
return STATUS_ALLOCATION_FAILED;
}
return STATUS_OK;
}
/* Demangles and emits an <operator-name>. If SHORT_NAME is non-zero,
the short form is emitted; otherwise the full source form
(`operator +' etc.) is emitted. *NUM_ARGS is set to the number of
operands that the operator takes.
<operator-name>
::= nw # new
::= na # new[]
::= dl # delete
::= da # delete[]
::= ps # + (unary)
::= ng # - (unary)
::= ad # & (unary)
::= de # * (unary)
::= co # ~
::= pl # +
::= mi # -
::= ml # *
::= dv # /
::= rm # %
::= an # &
::= or # |
::= eo # ^
::= aS # =
::= pL # +=
::= mI # -=
::= mL # *=
::= dV # /=
::= rM # %=
::= aN # &=
::= oR # |=
::= eO # ^=
::= ls # <<
::= rs # >>
::= lS # <<=
::= rS # >>=
::= eq # ==
::= ne # !=
::= lt # <
::= gt # >
::= le # <=
::= ge # >=
::= nt # !
::= aa # &&
::= oo # ||
::= pp # ++
::= mm # --
::= cm # ,
::= pm # ->*
::= pt # ->
::= cl # ()
::= ix # []
::= qu # ?
::= sz # sizeof
::= cv <type> # cast
::= vx <source-name> # vendor extended operator */
static status_t
demangle_operator_name (dm, short_name, num_args)
demangling_t dm;
int short_name;
int *num_args;
{
struct operator_code
{
/* The mangled code for this operator. */
const char *code;
/* The source name of this operator. */
const char *name;
/* The number of arguments this operator takes. */
int num_args;
};
static const struct operator_code operators[] =
{
{ "aN", "&=" , 2 },
{ "aS", "=" , 2 },
{ "aa", "&&" , 2 },
{ "ad", "&" , 1 },
{ "an", "&" , 2 },
{ "cl", "()" , 0 },
{ "cm", "," , 2 },
{ "co", "~" , 1 },
{ "dV", "/=" , 2 },
{ "da", " delete[]", 1 },
{ "de", "*" , 1 },
{ "dl", " delete" , 1 },
{ "dv", "/" , 2 },
{ "eO", "^=" , 2 },
{ "eo", "^" , 2 },
{ "eq", "==" , 2 },
{ "ge", ">=" , 2 },
{ "gt", ">" , 2 },
{ "ix", "[]" , 2 },
{ "lS", "<<=" , 2 },
{ "le", "<=" , 2 },
{ "ls", "<<" , 2 },
{ "lt", "<" , 2 },
{ "mI", "-=" , 2 },
{ "mL", "*=" , 2 },
{ "mi", "-" , 2 },
{ "ml", "*" , 2 },
{ "mm", "--" , 1 },
{ "na", " new[]" , 1 },
{ "ne", "!=" , 2 },
{ "ng", "-" , 1 },
{ "nt", "!" , 1 },
{ "nw", " new" , 1 },
{ "oR", "|=" , 2 },
{ "oo", "||" , 2 },
{ "or", "|" , 2 },
{ "pL", "+=" , 2 },
{ "pl", "+" , 2 },
{ "pm", "->*" , 2 },
{ "pp", "++" , 1 },
{ "ps", "+" , 1 },
{ "qu", "?" , 3 },
{ "rM", "%=" , 2 },
{ "rS", ">>=" , 2 },
{ "rm", "%" , 2 },
{ "rs", ">>" , 2 },
{ "sz", " sizeof" , 1 }
};
const int num_operators =
sizeof (operators) / sizeof (struct operator_code);
int c0 = next_char (dm);
int c1 = next_char (dm);
const struct operator_code* p1 = operators;
const struct operator_code* p2 = operators + num_operators;
DEMANGLE_TRACE ("operator-name", dm);
/* Is this a vendor extended operator? */
if (c0 == 'v' && c1 == 'x')
{
RETURN_IF_ERROR (result_append (dm, "operator"));
RETURN_IF_ERROR (demangle_source_name (dm));
*num_args = 0;
return STATUS_OK;
}
/* Is this a conversion operator? */
if (c0 == 'c' && c1 == 'v')
{
RETURN_IF_ERROR (result_append (dm, "operator "));
/* Demangle the converted-to type. */
RETURN_IF_ERROR (demangle_type (dm));
*num_args = 0;
return STATUS_OK;
}
/* Perform a binary search for the operator code. */
while (1)
{
const struct operator_code* p = p1 + (p2 - p1) / 2;
char match0 = p->code[0];
char match1 = p->code[1];
if (c0 == match0 && c1 == match1)
/* Found it. */
{
if (!short_name)
RETURN_IF_ERROR (result_append (dm, "operator"));
RETURN_IF_ERROR (result_append (dm, p->name));
*num_args = p->num_args;
return STATUS_OK;
}
if (p == p1)
/* Couldn't find it. */
return "Unknown code in <operator-name>.";
/* Try again. */
if (c0 < match0 || (c0 == match0 && c1 < match1))
p2 = p;
else
p1 = p;
}
}
/* Demangles and emits a <special-name>.
<special-name> ::= GV <object name> # Guard variable
::= Th[n] <offset number> _ <base name> <base encoding>
# non-virtual base override thunk
::= Tv[n] <offset number> _ <vcall offset number>
_ <base encoding>
# virtual base override thunk
::= TV <type> # virtual table
::= TT <type> # VTT
::= TI <type> # typeinfo structure
::= TS <type> # typeinfo name
Also demangles the special g++ manglings,
<special-name> ::= CT <type> <offset number> _ <base type>
# construction vtable
::= TF <type> # typeinfo function (old ABI only)
::= TJ <type> # java Class structure */
static status_t
demangle_special_name (dm)
demangling_t dm;
{
dyn_string_t number;
int unused;
char peek = peek_char (dm);
DEMANGLE_TRACE ("special-name", dm);
if (peek == 'G')
{
/* A guard variable name. Consume the G. */
advance_char (dm);
RETURN_IF_ERROR (demangle_char (dm, 'V'));
RETURN_IF_ERROR (result_append (dm, "guard variable for "));
RETURN_IF_ERROR (demangle_name (dm, &unused));
}
else if (peek == 'T')
{
status_t status = STATUS_OK;
/* Other C++ implementation miscellania. Consume the T. */
advance_char (dm);
switch (peek_char (dm))
{
case 'V':
/* Virtual table. */
advance_char (dm);
RETURN_IF_ERROR (result_append (dm, "vtable for "));
RETURN_IF_ERROR (demangle_type (dm));
break;
case 'T':
/* VTT structure. */
advance_char (dm);
RETURN_IF_ERROR (result_append (dm, "VTT for "));
RETURN_IF_ERROR (demangle_type (dm));
break;
case 'I':
/* Typeinfo structure. */
advance_char (dm);
RETURN_IF_ERROR (result_append (dm, "typeinfo for "));
RETURN_IF_ERROR (demangle_type (dm));
break;
case 'F':
/* Typeinfo function. Used only in old ABI with new mangling. */
advance_char (dm);
RETURN_IF_ERROR (result_append (dm, "typeinfo fn for "));
RETURN_IF_ERROR (demangle_type (dm));
break;
case 'S':
/* Character string containing type name, used in typeinfo. */
advance_char (dm);
RETURN_IF_ERROR (result_append (dm, "typeinfo name for "));
RETURN_IF_ERROR (demangle_type (dm));
break;
case 'J':
/* The java Class variable corresponding to a C++ class. */
advance_char (dm);
RETURN_IF_ERROR (result_append (dm, "java Class for "));
RETURN_IF_ERROR (demangle_type (dm));
break;
case 'h':
/* Non-virtual thunk. */
advance_char (dm);
RETURN_IF_ERROR (result_append (dm, "non-virtual thunk"));
/* Demangle and emit the offset. */
number = dyn_string_new (4);
if (number == NULL)
return STATUS_ALLOCATION_FAILED;
demangle_number_literally (dm, number, 10, 1);
/* Don't display the offset unless in verbose mode. */
if (flag_verbose)
{
status = result_append_char (dm, ' ');
if (STATUS_NO_ERROR (status))
status = result_append_string (dm, number);
}
dyn_string_delete (number);
RETURN_IF_ERROR (status);
/* Demangle the separator. */
RETURN_IF_ERROR (demangle_char (dm, '_'));
/* Demangle and emit the target name and function type. */
RETURN_IF_ERROR (result_append (dm, " to "));
RETURN_IF_ERROR (demangle_encoding (dm));
break;
case 'v':
/* Virtual thunk. */
advance_char (dm);
RETURN_IF_ERROR (result_append (dm, "virtual thunk "));
/* Demangle and emit the offset. */
number = dyn_string_new (4);
if (number == NULL)
return STATUS_ALLOCATION_FAILED;
demangle_number_literally (dm, number, 10, 1);
/* Don't display the offset unless in verbose mode. */
if (flag_verbose)
{
status = result_append_string (dm, number);
if (STATUS_NO_ERROR (status))
result_append_char (dm, ' ');
}
dyn_string_delete (number);
RETURN_IF_ERROR (status);
/* Demangle the separator. */
RETURN_IF_ERROR (demangle_char (dm, '_'));
/* Demangle and emit the vcall offset. */
number = dyn_string_new (4);
if (number == NULL)
return STATUS_ALLOCATION_FAILED;
demangle_number_literally (dm, number, 10, 1);
/* Don't display the vcall offset unless in verbose mode. */
if (flag_verbose)
{
status = result_append_string (dm, number);
if (STATUS_NO_ERROR (status))
status = result_append_char (dm, ' ');
}
dyn_string_delete (number);
RETURN_IF_ERROR (status);
/* Demangle the separator. */
RETURN_IF_ERROR (demangle_char (dm, '_'));
/* Demangle and emit the target function. */
RETURN_IF_ERROR (result_append (dm, "to "));
RETURN_IF_ERROR (demangle_encoding (dm));
break;
case 'C':
/* TC is a special g++ mangling for a construction vtable. */
if (!flag_strict)
{
dyn_string_t derived_type;
advance_char (dm);
RETURN_IF_ERROR (result_append (dm, "construction vtable for "));
/* Demangle the derived type off to the side. */
RETURN_IF_ERROR (result_push (dm));
RETURN_IF_ERROR (demangle_type (dm));
derived_type = (dyn_string_t) result_pop (dm);
/* Demangle the offset. */
number = dyn_string_new (4);
if (number == NULL)
{
dyn_string_delete (derived_type);
return STATUS_ALLOCATION_FAILED;
}
demangle_number_literally (dm, number, 10, 1);
/* Demangle the underscore separator. */
status = demangle_char (dm, '_');
/* Demangle the base type. */
if (STATUS_NO_ERROR (status))
status = demangle_type (dm);
/* Emit the derived type. */
if (STATUS_NO_ERROR (status))
status = result_append (dm, "-in-");
if (STATUS_NO_ERROR (status))
status = result_append_string (dm, derived_type);
dyn_string_delete (derived_type);
/* Don't display the offset unless in verbose mode. */
if (flag_verbose)
{
status = result_append_char (dm, ' ');
if (STATUS_NO_ERROR (status))
result_append_string (dm, number);
}
dyn_string_delete (number);
RETURN_IF_ERROR (status);
break;
}
/* If flag_strict, fall through. */
default:
return "Unrecognized <special-name>.";
}
}
else
return STATUS_ERROR;
return STATUS_OK;
}
/* Demangles and emits a <ctor-dtor-name>.
<ctor-dtor-name>
::= C1 # complete object (in-charge) ctor
::= C2 # base object (not-in-charge) ctor
::= C3 # complete object (in-charge) allocating ctor
::= C4 # base object (not-in-charge) allocating ctor
::= D0 # deleting (in-charge) dtor
::= D1 # complete object (in-charge) dtor
::= D2 # base object (not-in-charge) dtor */
static status_t
demangle_ctor_dtor_name (dm)
demangling_t dm;
{
static const char *const ctor_flavors[] =
{
"in-charge",
"not-in-charge",
"in-charge allocating",
"not-in-charge allocating"
};
static const char *const dtor_flavors[] =
{
"in-charge deleting",
"in-charge",
"not-in-charge"
};
int flavor;
char peek = peek_char (dm);
DEMANGLE_TRACE ("ctor-dtor-name", dm);
if (peek == 'C')
{
/* A constructor name. Consume the C. */
advance_char (dm);
if (peek_char (dm) < '1' || peek_char (dm) > '4')
return "Unrecognized constructor.";
RETURN_IF_ERROR (result_append_string (dm, dm->last_source_name));
/* Print the flavor of the constructor if in verbose mode. */
flavor = next_char (dm) - '1';
if (flag_verbose)
{
RETURN_IF_ERROR (result_append (dm, "["));
RETURN_IF_ERROR (result_append (dm, ctor_flavors[flavor]));
RETURN_IF_ERROR (result_append_char (dm, ']'));
}
}
else if (peek == 'D')
{
/* A destructor name. Consume the D. */
advance_char (dm);
if (peek_char (dm) < '0' || peek_char (dm) > '2')
return "Unrecognized destructor.";
RETURN_IF_ERROR (result_append_char (dm, '~'));
RETURN_IF_ERROR (result_append_string (dm, dm->last_source_name));
/* Print the flavor of the destructor if in verbose mode. */
flavor = next_char (dm) - '0';
if (flag_verbose)
{
RETURN_IF_ERROR (result_append (dm, " ["));
RETURN_IF_ERROR (result_append (dm, dtor_flavors[flavor]));
RETURN_IF_ERROR (result_append_char (dm, ']'));
}
}
else
return STATUS_ERROR;
return STATUS_OK;
}
/* Handle pointer, reference, and pointer-to-member cases for
demangle_type. All consecutive `P's, `R's, and 'M's are joined to
build a pointer/reference type. We snarf all these, plus the
following <type>, all at once since we need to know whether we have
a pointer to data or pointer to function to construct the right
output syntax. C++'s pointer syntax is hairy.
<type> ::= P <type>
::= R <type>
::= <pointer-to-member-type>
<pointer-to-member-type> ::= M </class/ type> </member/ type> */
static status_t
demangle_type_ptr (dm)
demangling_t dm;
{
char next;
status_t status;
/* Collect pointer symbols into this string. */
dyn_string_t symbols = dyn_string_new (10);
DEMANGLE_TRACE ("type*", dm);
if (symbols == NULL)
return STATUS_ALLOCATION_FAILED;
/* Scan forward, collecting pointers and references into symbols,
until we hit something else. Then emit the type. */
while (1)
{
next = peek_char (dm);
if (next == 'P')
{
if (!dyn_string_append_char (symbols, '*'))
return STATUS_ALLOCATION_FAILED;
advance_char (dm);
}
else if (next == 'R')
{
if (!dyn_string_append_char (symbols, '&'))
return STATUS_ALLOCATION_FAILED;
advance_char (dm);
}
else if (next == 'M')
{
/* Pointer-to-member. */
dyn_string_t class_type;
/* Eat the 'M'. */
advance_char (dm);
/* Capture the type of which this is a pointer-to-member. */
RETURN_IF_ERROR (result_push (dm));
RETURN_IF_ERROR (demangle_type (dm));
class_type = (dyn_string_t) result_pop (dm);
/* Build the pointer-to-member notation. It comes before
other pointer and reference qualifiers -- */
if (!dyn_string_prepend_cstr (symbols, "::*"))
return STATUS_ALLOCATION_FAILED;
if (!dyn_string_prepend (symbols, class_type))
return STATUS_ALLOCATION_FAILED;
dyn_string_delete (class_type);
if (peek_char (dm) == 'F')
continue;
/* Demangle the type of the pointed-to member. */
status = demangle_type (dm);
/* Make it pretty. */
if (STATUS_NO_ERROR (status))
status = result_append_space (dm);
/* Add the pointer-to-member syntax, and other pointer and
reference symbols. */
if (STATUS_NO_ERROR (status))
status = result_append_string (dm, symbols);
/* Clean up. */
dyn_string_delete (symbols);
RETURN_IF_ERROR (status);
return STATUS_OK;
}
else if (next == 'F')
{
/* Ooh, tricky, a pointer-to-function. */
int position = result_length (dm);
status = result_append_char (dm, '(');
if (STATUS_NO_ERROR (status))
status = result_append_string (dm, symbols);
if (STATUS_NO_ERROR (status))
status = result_append_char (dm, ')');
dyn_string_delete (symbols);
RETURN_IF_ERROR (status);
RETURN_IF_ERROR (demangle_function_type (dm, position));
return STATUS_OK;
}
else
{
/* No more pointe or reference tokens. Finish up. */
status = demangle_type (dm);
if (STATUS_NO_ERROR (status))
status = result_append_string (dm, symbols);
dyn_string_delete (symbols);
RETURN_IF_ERROR (status);
RETURN_IF_ERROR (status);
return STATUS_OK;
}
}
}
/* Demangles and emits a <type>.
<type> ::= <builtin-type>
::= <function-type>
::= <class-enum-type>
::= <array-type>
::= <pointer-to-member-type>
::= <template-param>
::= <CV-qualifiers> <type>
::= P <type> # pointer-to
::= R <type> # reference-to
::= C <type> # complex pair (C 2000)
::= G <type> # imaginary (C 2000)
::= U <source-name> <type> # vendor extended type qualifier
::= <substitution> */
static status_t
demangle_type (dm)
demangling_t dm;
{
int start = substitution_start (dm);
char peek = peek_char (dm);
char peek_next;
int template_p = 0;
int special_std_substitution;
int is_builtin_type = 0;
template_arg_list_t old_arg_list = current_template_arg_list (dm);
int template_parm = NOT_TEMPLATE_PARM;
DEMANGLE_TRACE ("type", dm);
/* A <class-enum-type> can start with a digit (a <source-name>), an
N (a <nested-name>), or a Z (a <local-name>). */
if (IS_DIGIT ((unsigned char) peek) || peek == 'N' || peek == 'Z')
RETURN_IF_ERROR (demangle_class_enum_type (dm, &template_p));
else if (peek >= 'a' && peek <= 'z')
{
RETURN_IF_ERROR (demangle_builtin_type (dm));
is_builtin_type = 1;
}
else
switch (peek)
{
case 'r':
case 'V':
case 'K':
{
status_t status;
dyn_string_t cv_qualifiers = dyn_string_new (24);
if (cv_qualifiers == NULL)
return STATUS_ALLOCATION_FAILED;
demangle_CV_qualifiers (dm, cv_qualifiers);
/* If the qualifiers apply to a pointer or reference, they
need to come after the whole qualified type. */
if (peek_char (dm) == 'P' || peek_char (dm) == 'R')
{
status = demangle_type (dm);
if (STATUS_NO_ERROR (status))
status = result_append_space (dm);
if (STATUS_NO_ERROR (status))
status = result_append_string (dm, cv_qualifiers);
}
/* Otherwise, the qualifiers come first. */
else
{
status = result_append_string (dm, cv_qualifiers);
if (STATUS_NO_ERROR (status))
status = result_append_space (dm);
if (STATUS_NO_ERROR (status))
status = demangle_type (dm);
}
dyn_string_delete (cv_qualifiers);
RETURN_IF_ERROR (status);
}
break;
case 'F':
return "Non-pointer or -reference function type.";
case 'A':
RETURN_IF_ERROR (demangle_array_type (dm));
break;
case 'T':
RETURN_IF_ERROR (demangle_template_param (dm, &template_parm));
break;
case 'S':
/* First check if this is a special substitution. If it is,
this is a <class-enum-type>. Special substitutions have a
letter following the `S'; other substitutions have a digit
or underscore. */
peek_next = peek_char_next (dm);
if (IS_DIGIT (peek_next) || peek_next == '_')
RETURN_IF_ERROR (demangle_substitution (dm, &template_p,
&special_std_substitution));
else
demangle_class_enum_type (dm, &template_p);
break;
case 'P':
case 'R':
case 'M':
RETURN_IF_ERROR (demangle_type_ptr (dm));
break;
case 'C':
/* A C99 complex type. */
RETURN_IF_ERROR (result_append (dm, "complex "));
advance_char (dm);
RETURN_IF_ERROR (demangle_type (dm));
break;
case 'G':
/* A C99 imaginary type. */
RETURN_IF_ERROR (result_append (dm, "imaginary "));
advance_char (dm);
RETURN_IF_ERROR (demangle_type (dm));
break;
case 'U':
/* Vendor extended type qualifier. */
advance_char (dm);
RETURN_IF_ERROR (demangle_source_name (dm));
RETURN_IF_ERROR (result_append_char (dm, ' '));
RETURN_IF_ERROR (demangle_type (dm));
break;
default:
return "Unexpected character in <type>.";
}
/* Unqualified builin types are not substitution candidates. */
if (!is_builtin_type)
/* Add a new substitution for the type. If this type was a
<template-param>, pass its index since from the point of
substitutions, a <template-param> token is a substitution
candidate distinct from the type that is substituted for it. */
RETURN_IF_ERROR (substitution_add (dm, start, template_p, template_parm));
/* Pop off template argument lists added during mangling of this
type. */
pop_to_template_arg_list (dm, old_arg_list);
return STATUS_OK;
}
/* C++ source names of builtin types, indexed by the mangled code
letter's position in the alphabet ('a' -> 0, 'b' -> 1, etc). */
static const char *const builtin_type_names[26] =
{
"signed char", /* a */
"bool", /* b */
"char", /* c */
"double", /* d */
"long double", /* e */
"float", /* f */
"__float128", /* g */
"unsigned char", /* h */
"int", /* i */
"unsigned", /* j */
NULL, /* k */
"long", /* l */
"unsigned long", /* m */
"__int128", /* n */
"unsigned __int128", /* o */
NULL, /* p */
NULL, /* q */
NULL, /* r */
"short", /* s */
"unsigned short", /* t */
NULL, /* u */
"void", /* v */
"wchar_t", /* w */
"long long", /* x */
"unsigned long long", /* y */
"..." /* z */
};
/* Demangles and emits a <builtin-type>.
<builtin-type> ::= v # void
::= w # wchar_t
::= b # bool
::= c # char
::= a # signed char
::= h # unsigned char
::= s # short
::= t # unsigned short
::= i # int
::= j # unsigned int
::= l # long
::= m # unsigned long
::= x # long long, __int64
::= y # unsigned long long, __int64
::= n # __int128
::= o # unsigned __int128
::= f # float
::= d # double
::= e # long double, __float80
::= g # __float128
::= z # ellipsis
::= u <source-name> # vendor extended type */
static status_t
demangle_builtin_type (dm)
demangling_t dm;
{
char code = peek_char (dm);
DEMANGLE_TRACE ("builtin-type", dm);
if (code == 'u')
{
advance_char (dm);
RETURN_IF_ERROR (demangle_source_name (dm));
return STATUS_OK;
}
else if (code >= 'a' && code <= 'z')
{
const char *type_name = builtin_type_names[code - 'a'];
if (type_name == NULL)
return "Unrecognized <builtin-type> code.";
RETURN_IF_ERROR (result_append (dm, type_name));
advance_char (dm);
return STATUS_OK;
}
else
return "Non-alphabetic <builtin-type> code.";
}
/* Demangles all consecutive CV-qualifiers (const, volatile, and
restrict) at the current position. The qualifiers are appended to
QUALIFIERS. Returns STATUS_OK. */
static status_t
demangle_CV_qualifiers (dm, qualifiers)
demangling_t dm;
dyn_string_t qualifiers;
{
DEMANGLE_TRACE ("CV-qualifiers", dm);
while (1)
{
switch (peek_char (dm))
{
case 'r':
if (!dyn_string_append_space (qualifiers))
return STATUS_ALLOCATION_FAILED;
if (!dyn_string_append_cstr (qualifiers, "restrict"))
return STATUS_ALLOCATION_FAILED;
break;
case 'V':
if (!dyn_string_append_space (qualifiers))
return STATUS_ALLOCATION_FAILED;
if (!dyn_string_append_cstr (qualifiers, "volatile"))
return STATUS_ALLOCATION_FAILED;
break;
case 'K':
if (!dyn_string_append_space (qualifiers))
return STATUS_ALLOCATION_FAILED;
if (!dyn_string_append_cstr (qualifiers, "const"))
return STATUS_ALLOCATION_FAILED;
break;
default:
return STATUS_OK;
}
advance_char (dm);
}
}
/* Demangles and emits a <function-type> FUNCTION_NAME_POS is the
position in the result string of the start of the function
identifier, at which the function's return type will be inserted.
<function-type> ::= F [Y] <bare-function-type> E */
static status_t
demangle_function_type (dm, function_name_pos)
demangling_t dm;
int function_name_pos;
{
DEMANGLE_TRACE ("function-type", dm);
RETURN_IF_ERROR (demangle_char (dm, 'F'));
if (peek_char (dm) == 'Y')
{
/* Indicate this function has C linkage if in verbose mode. */
if (flag_verbose)
RETURN_IF_ERROR (result_append (dm, " [extern \"C\"] "));
advance_char (dm);
}
RETURN_IF_ERROR (demangle_bare_function_type (dm, function_name_pos));
RETURN_IF_ERROR (demangle_char (dm, 'E'));
return STATUS_OK;
}
/* Demangles and emits a <bare-function-type>. RETURN_TYPE_POS is the
position in the result string at which the function return type
should be inserted. If RETURN_TYPE_POS is BFT_NO_RETURN_TYPE, the
function's return type is assumed not to be encoded.
<bare-function-type> ::= <signature type>+ */
static status_t
demangle_bare_function_type (dm, return_type_pos)
demangling_t dm;
int return_type_pos;
{
/* Sequence is the index of the current function parameter, counting
from zero. The value -1 denotes the return type. */
int sequence =
(return_type_pos == BFT_NO_RETURN_TYPE ? 0 : -1);
DEMANGLE_TRACE ("bare-function-type", dm);
RETURN_IF_ERROR (result_append_char (dm, '('));
while (!end_of_name_p (dm) && peek_char (dm) != 'E')
{
if (sequence == -1)
/* We're decoding the function's return type. */
{
dyn_string_t return_type;
status_t status = STATUS_OK;
/* Decode the return type off to the side. */
RETURN_IF_ERROR (result_push (dm));
RETURN_IF_ERROR (demangle_type (dm));
return_type = (dyn_string_t) result_pop (dm);
/* Add a space to the end of the type. Insert the return
type where we've been asked to. */
if (!dyn_string_append_space (return_type)
|| !dyn_string_insert (result_string (dm), return_type_pos,
return_type))
status = STATUS_ALLOCATION_FAILED;
dyn_string_delete (return_type);
RETURN_IF_ERROR (status);
}
else
{
/* Skip `void' parameter types. One should only occur as
the only type in a parameter list; in that case, we want
to print `foo ()' instead of `foo (void)'. */
if (peek_char (dm) == 'v')
{
/* Consume the v. */
advance_char (dm);
continue;
}
/* Separate parameter types by commas. */
if (sequence > 0)
RETURN_IF_ERROR (result_append (dm, ", "));
/* Demangle the type. */
RETURN_IF_ERROR (demangle_type (dm));
}
++sequence;
}
RETURN_IF_ERROR (result_append_char (dm, ')'));
return STATUS_OK;
}
/* Demangles and emits a <class-enum-type>. *TEMPLATE_P is set to
non-zero if the type is a template-id, zero otherwise.
<class-enum-type> ::= <name> */
static status_t
demangle_class_enum_type (dm, template_p)
demangling_t dm;
int *template_p;
{
DEMANGLE_TRACE ("class-enum-type", dm);
RETURN_IF_ERROR (demangle_name (dm, template_p));
return STATUS_OK;
}
/* Demangles and emits an <array-type>.
<array-type> ::= A [<dimension number>] _ <element type> */
static status_t
demangle_array_type (dm)
demangling_t dm;
{
status_t status;
dyn_string_t array_size = dyn_string_new (10);
if (array_size == NULL)
return STATUS_ALLOCATION_FAILED;
status = demangle_char (dm, 'A');
/* Demangle the array size into array_size. */
if (STATUS_NO_ERROR (status))
status = demangle_number_literally (dm, array_size, 10, 0);
/* Demangle the base type of the array. */
if (STATUS_NO_ERROR (status))
status = demangle_char (dm, '_');
if (STATUS_NO_ERROR (status))
status = demangle_type (dm);
/* Emit the array dimension syntax. */
if (STATUS_NO_ERROR (status))
status = result_append_char (dm, '[');
if (STATUS_NO_ERROR (status))
status = result_append_string (dm, array_size);
if (STATUS_NO_ERROR (status))
status = result_append_char (dm, ']');
dyn_string_delete (array_size);
RETURN_IF_ERROR (status);
return STATUS_OK;
}
/* Demangles and emits a <template-param>. The zero-indexed position
in the parameter list is placed in *TEMPLATE_PARM_NUMBER.
<template-param> ::= T_ # first template parameter
::= T <parameter-2 number> _ */
static status_t
demangle_template_param (dm, template_parm_number)
demangling_t dm;
int *template_parm_number;
{
int parm_number;
template_arg_list_t current_arg_list = current_template_arg_list (dm);
string_list_t arg;
DEMANGLE_TRACE ("template-param", dm);
/* Make sure there is a template argmust list in which to look up
this parameter reference. */
if (current_arg_list == NULL)
return "Template parameter outside of template.";
RETURN_IF_ERROR (demangle_char (dm, 'T'));
if (peek_char (dm) == '_')
parm_number = 0;
else
{
RETURN_IF_ERROR (demangle_number (dm, &parm_number, 10, 0));
++parm_number;
}
RETURN_IF_ERROR (demangle_char (dm, '_'));
arg = template_arg_list_get_arg (current_arg_list, parm_number);
if (arg == NULL)
/* parm_number exceeded the number of arguments in the current
template argument list. */
return "Template parameter number out of bounds.";
RETURN_IF_ERROR (result_append_string (dm, (dyn_string_t) arg));
if (peek_char (dm) == 'I')
RETURN_IF_ERROR (demangle_template_args (dm));
*template_parm_number = parm_number;
return STATUS_OK;
}
/* Demangles and emits a <template-args>.
<template-args> ::= I <template-arg>+ E */
static status_t
demangle_template_args (dm)
demangling_t dm;
{
int first = 1;
dyn_string_t old_last_source_name;
template_arg_list_t arg_list = template_arg_list_new ();
if (arg_list == NULL)
return STATUS_ALLOCATION_FAILED;
/* Preserve the most recently demangled source name. */
old_last_source_name = dm->last_source_name;
dm->last_source_name = dyn_string_new (0);
DEMANGLE_TRACE ("template-args", dm);
if (dm->last_source_name == NULL)
return STATUS_ALLOCATION_FAILED;
RETURN_IF_ERROR (demangle_char (dm, 'I'));
RETURN_IF_ERROR (result_append_char (dm, '<'));
do
{
string_list_t arg;
if (first)
first = 0;
else
RETURN_IF_ERROR (result_append (dm, ", "));
/* Capture the template arg. */
RETURN_IF_ERROR (result_push (dm));
RETURN_IF_ERROR (demangle_template_arg (dm));
arg = result_pop (dm);
/* Emit it in the demangled name. */
RETURN_IF_ERROR (result_append_string (dm, (dyn_string_t) arg));
/* Save it for use in expanding <template-param>s. */
template_arg_list_add_arg (arg_list, arg);
}
while (peek_char (dm) != 'E');
/* Append the '>'. */
RETURN_IF_ERROR (result_close_template_list (dm));
/* Consume the 'E'. */
advance_char (dm);
/* Restore the most recent demangled source name. */
dyn_string_delete (dm->last_source_name);
dm->last_source_name = old_last_source_name;
/* Push the list onto the top of the stack of template argument
lists, so that arguments from it are used from now on when
expanding <template-param>s. */
push_template_arg_list (dm, arg_list);
return STATUS_OK;
}
/* This function, which does not correspond to a production in the
mangling spec, handles the `literal' production for both
<template-arg> and <expr-primary>. It does not expect or consume
the initial `L' or final `E'. The demangling is given by:
<literal> ::= <type> </value/ number>
and the emitted output is `(type)number'. */
static status_t
demangle_literal (dm)
demangling_t dm;
{
char peek = peek_char (dm);
dyn_string_t value_string;
status_t status;
DEMANGLE_TRACE ("literal", dm);
if (!flag_verbose && peek >= 'a' && peek <= 'z')
{
/* If not in verbose mode and this is a builtin type, see if we
can produce simpler numerical output. In particular, for
integer types shorter than `long', just write the number
without type information; for bools, write `true' or `false'.
Other refinements could be made here too. */
/* This constant string is used to map from <builtin-type> codes
(26 letters of the alphabet) to codes that determine how the
value will be displayed. The codes are:
b: display as bool
i: display as int
l: display as long
A space means the value will be represented using cast
notation. */
static const char *const code_map = "ibi iii ll ii i ";
char code = code_map[peek - 'a'];
/* FIXME: Implement demangling of floats and doubles. */
if (code == 'u')
return STATUS_UNIMPLEMENTED;
if (code == 'b')
{
/* It's a boolean. */
char value;
/* Consume the b. */
advance_char (dm);
/* Look at the next character. It should be 0 or 1,
corresponding to false or true, respectively. */
value = peek_char (dm);
if (value == '0')
RETURN_IF_ERROR (result_append (dm, "false"));
else if (value == '1')
RETURN_IF_ERROR (result_append (dm, "true"));
else
return "Unrecognized bool constant.";
/* Consume the 0 or 1. */
advance_char (dm);
return STATUS_OK;
}
else if (code == 'i' || code == 'l')
{
/* It's an integer or long. */
/* Consume the type character. */
advance_char (dm);
/* Demangle the number and write it out. */
value_string = dyn_string_new (0);
status = demangle_number_literally (dm, value_string, 10, 1);
if (STATUS_NO_ERROR (status))
status = result_append_string (dm, value_string);
/* For long integers, append an l. */
if (code == 'l' && STATUS_NO_ERROR (status))
status = result_append_char (dm, code);
dyn_string_delete (value_string);
RETURN_IF_ERROR (status);
return STATUS_OK;
}
/* ...else code == ' ', so fall through to represent this
literal's type explicitly using cast syntax. */
}
RETURN_IF_ERROR (result_append_char (dm, '('));
RETURN_IF_ERROR (demangle_type (dm));
RETURN_IF_ERROR (result_append_char (dm, ')'));
value_string = dyn_string_new (0);
if (value_string == NULL)
return STATUS_ALLOCATION_FAILED;
status = demangle_number_literally (dm, value_string, 10, 1);
if (STATUS_NO_ERROR (status))
status = result_append_string (dm, value_string);
dyn_string_delete (value_string);
RETURN_IF_ERROR (status);
return STATUS_OK;
}
/* Demangles and emits a <template-arg>.
<template-arg> ::= <type> # type
::= L <type> <value number> E # literal
::= LZ <encoding> E # external name
::= X <expression> E # expression */
static status_t
demangle_template_arg (dm)
demangling_t dm;
{
DEMANGLE_TRACE ("template-arg", dm);
switch (peek_char (dm))
{
case 'L':
advance_char (dm);
if (peek_char (dm) == 'Z')
{
/* External name. */
advance_char (dm);
/* FIXME: Standard is contradictory here. */
RETURN_IF_ERROR (demangle_encoding (dm));
}
else
RETURN_IF_ERROR (demangle_literal (dm));
RETURN_IF_ERROR (demangle_char (dm, 'E'));
break;
case 'X':
/* Expression. */
advance_char (dm);
RETURN_IF_ERROR (demangle_expression (dm));
break;
default:
RETURN_IF_ERROR (demangle_type (dm));
break;
}
return STATUS_OK;
}
/* Demangles and emits an <expression>.
<expression> ::= <unary operator-name> <expression>
::= <binary operator-name> <expression> <expression>
::= <expr-primary>
::= <scope-expression> */
static status_t
demangle_expression (dm)
demangling_t dm;
{
char peek = peek_char (dm);
DEMANGLE_TRACE ("expression", dm);
if (peek == 'L' || peek == 'T')
RETURN_IF_ERROR (demangle_expr_primary (dm));
else if (peek == 's' && peek_char_next (dm) == 'r')
RETURN_IF_ERROR (demangle_scope_expression (dm));
else
/* An operator expression. */
{
int num_args;
status_t status = STATUS_OK;
dyn_string_t operator_name;
/* We have an operator name. Since we want to output binary
operations in infix notation, capture the operator name
first. */
RETURN_IF_ERROR (result_push (dm));
RETURN_IF_ERROR (demangle_operator_name (dm, 1, &num_args));
operator_name = (dyn_string_t) result_pop (dm);
/* If it's binary, do an operand first. */
if (num_args > 1)
{
status = result_append_char (dm, '(');
if (STATUS_NO_ERROR (status))
status = demangle_expression (dm);
if (STATUS_NO_ERROR (status))
status = result_append_char (dm, ')');
}
/* Emit the operator. */
if (STATUS_NO_ERROR (status))
status = result_append_string (dm, operator_name);
dyn_string_delete (operator_name);
RETURN_IF_ERROR (status);
/* Emit its second (if binary) or only (if unary) operand. */
RETURN_IF_ERROR (result_append_char (dm, '('));
RETURN_IF_ERROR (demangle_expression (dm));
RETURN_IF_ERROR (result_append_char (dm, ')'));
/* The ternary operator takes a third operand. */
if (num_args == 3)
{
RETURN_IF_ERROR (result_append (dm, ":("));
RETURN_IF_ERROR (demangle_expression (dm));
RETURN_IF_ERROR (result_append_char (dm, ')'));
}
}
return STATUS_OK;
}
/* Demangles and emits a <scope-expression>.
<scope-expression> ::= sr <qualifying type> <source-name>
::= sr <qualifying type> <encoding> */
static status_t
demangle_scope_expression (dm)
demangling_t dm;
{
RETURN_IF_ERROR (demangle_char (dm, 's'));
RETURN_IF_ERROR (demangle_char (dm, 'r'));
RETURN_IF_ERROR (demangle_type (dm));
RETURN_IF_ERROR (result_append (dm, "::"));
RETURN_IF_ERROR (demangle_encoding (dm));
return STATUS_OK;
}
/* Demangles and emits an <expr-primary>.
<expr-primary> ::= <template-param>
::= L <type> <value number> E # literal
::= L <mangled-name> E # external name */
static status_t
demangle_expr_primary (dm)
demangling_t dm;
{
char peek = peek_char (dm);
int unused;
DEMANGLE_TRACE ("expr-primary", dm);
if (peek == 'T')
RETURN_IF_ERROR (demangle_template_param (dm, &unused));
else if (peek == 'L')
{
/* Consume the `L'. */
advance_char (dm);
peek = peek_char (dm);
if (peek == '_')
RETURN_IF_ERROR (demangle_mangled_name (dm));
else
RETURN_IF_ERROR (demangle_literal (dm));
RETURN_IF_ERROR (demangle_char (dm, 'E'));
}
else
return STATUS_ERROR;
return STATUS_OK;
}
/* Demangles and emits a <substitution>. Sets *TEMPLATE_P to non-zero
if the substitution is the name of a template, zero otherwise. If
the substitution token is St, which corresponds to the `::std::'
namespace and can appear in a non-nested name, sets
*SPECIAL_STD_SUBSTITUTION to non-zero; zero otherwise.
<substitution> ::= S <seq-id> _
::= S_
::= St # ::std::
::= Sa # ::std::allocator
::= Sb # ::std::basic_string
::= Ss # ::std::basic_string<char,
::std::char_traits<char>,
::std::allocator<char> >
::= Si # ::std::basic_istream<char,
std::char_traits<char> >
::= So # ::std::basic_ostream<char,
std::char_traits<char> >
::= Sd # ::std::basic_iostream<char,
std::char_traits<char> >
*/
static status_t
demangle_substitution (dm, template_p, special_std_substitution)
demangling_t dm;
int *template_p;
int *special_std_substitution;
{
int seq_id;
int peek;
dyn_string_t text;
DEMANGLE_TRACE ("substitution", dm);
RETURN_IF_ERROR (demangle_char (dm, 'S'));
*special_std_substitution = 0;
/* Scan the substitution sequence index. A missing number denotes
the first index. */
peek = peek_char (dm);
if (peek == '_')
seq_id = -1;
/* If the following character is 0-9 or a capital letter, interpret
the sequence up to the next underscore as a base-36 substitution
index. */
else if (IS_DIGIT ((unsigned char) peek)
|| (peek >= 'A' && peek <= 'Z'))
RETURN_IF_ERROR (demangle_number (dm, &seq_id, 36, 0));
else
{
const char *new_last_source_name = NULL;
switch (peek)
{
case 't':
RETURN_IF_ERROR (result_append (dm, "std"));
*special_std_substitution = 1;
break;
case 'a':
RETURN_IF_ERROR (result_append (dm, "std::allocator"));
new_last_source_name = "allocator";
*template_p = 1;
break;
case 'b':
RETURN_IF_ERROR (result_append (dm, "std::basic_string"));
new_last_source_name = "basic_string";
*template_p = 1;
break;
case 's':
if (!flag_verbose)
{
RETURN_IF_ERROR (result_append (dm, "std::string"));
new_last_source_name = "string";
}
else
{
RETURN_IF_ERROR (result_append (dm, "std::basic_string<char, std::char_traits<char>, std::allocator<char> >"));
new_last_source_name = "basic_string";
}
*template_p = 0;
break;
case 'i':
if (!flag_verbose)
{
RETURN_IF_ERROR (result_append (dm, "std::istream"));
new_last_source_name = "istream";
}
else
{
RETURN_IF_ERROR (result_append (dm, "std::basic_istream<char, std::char_traints<char> >"));
new_last_source_name = "basic_istream";
}
*template_p = 0;
break;
case 'o':
if (!flag_verbose)
{
RETURN_IF_ERROR (result_append (dm, "std::ostream"));
new_last_source_name = "ostream";
}
else
{
RETURN_IF_ERROR (result_append (dm, "std::basic_ostream<char, std::char_traits<char> >"));
new_last_source_name = "basic_ostream";
}
*template_p = 0;
break;
case 'd':
if (!flag_verbose)
{
RETURN_IF_ERROR (result_append (dm, "std::iostream"));
new_last_source_name = "iostream";
}
else
{
RETURN_IF_ERROR (result_append (dm, "std::basic_iostream<char, std::char_traits<char> >"));
new_last_source_name = "basic_iostream";
}
*template_p = 0;
break;
default:
return "Unrecognized <substitution>.";
}
/* Consume the character we just processed. */
advance_char (dm);
if (new_last_source_name != NULL)
{
if (!dyn_string_copy_cstr (dm->last_source_name,
new_last_source_name))
return STATUS_ALLOCATION_FAILED;
}
return STATUS_OK;
}
/* Look up the substitution text. Since `S_' is the most recent
substitution, `S0_' is the second-most-recent, etc., shift the
numbering by one. */
text = substitution_get (dm, seq_id + 1, template_p);
if (text == NULL)
return "Substitution number out of range.";
/* Emit the substitution text. */
RETURN_IF_ERROR (result_append_string (dm, text));
RETURN_IF_ERROR (demangle_char (dm, '_'));
return STATUS_OK;
}
/* Demangles and emits a <local-name>.
<local-name> := Z <function encoding> E <entity name> [<discriminator>]
:= Z <function encoding> E s [<discriminator>] */
static status_t
demangle_local_name (dm)
demangling_t dm;
{
DEMANGLE_TRACE ("local-name", dm);
RETURN_IF_ERROR (demangle_char (dm, 'Z'));
RETURN_IF_ERROR (demangle_encoding (dm));
RETURN_IF_ERROR (demangle_char (dm, 'E'));
RETURN_IF_ERROR (result_append (dm, "'s "));
if (peek_char (dm) == 's')
{
/* Local character string literal. */
RETURN_IF_ERROR (result_append (dm, "string literal"));
/* Consume the s. */
advance_char (dm);
RETURN_IF_ERROR (demangle_discriminator (dm, 0));
}
else
{
int unused;
RETURN_IF_ERROR (result_append (dm, "local "));
/* Local name for some other entity. Demangle its name. */
RETURN_IF_ERROR (demangle_name (dm, &unused));
RETURN_IF_ERROR (demangle_discriminator (dm, 1));
}
return STATUS_OK;
}
/* Optimonally demangles and emits a <discriminator>. If there is no
<discriminator> at the current position in the mangled string, the
descriminator is assumed to be zero. Emit the discriminator number
in parentheses, unless SUPPRESS_FIRST is non-zero and the
discriminator is zero.
<discriminator> ::= _ <number> */
static status_t
demangle_discriminator (dm, suppress_first)
demangling_t dm;
int suppress_first;
{
/* Output for <discriminator>s to the demangled name is completely
supressed if not in verbose mode. */
if (peek_char (dm) == '_')
{
/* Consume the underscore. */
advance_char (dm);
if (flag_verbose)
RETURN_IF_ERROR (result_append (dm, " [#"));
/* Check if there's a number following the underscore. */
if (IS_DIGIT ((unsigned char) peek_char (dm)))
{
int discriminator;
/* Demangle the number. */
RETURN_IF_ERROR (demangle_number (dm, &discriminator, 10, 0));
if (flag_verbose)
/* Write the discriminator. The mangled number is two
less than the discriminator ordinal, counting from
zero. */
RETURN_IF_ERROR (int_to_dyn_string (discriminator + 2,
(dyn_string_t) dm->result));
}
else
{
if (flag_verbose)
/* A missing digit correspond to one. */
RETURN_IF_ERROR (result_append_char (dm, '1'));
}
if (flag_verbose)
RETURN_IF_ERROR (result_append_char (dm, ']'));
}
else if (!suppress_first)
{
if (flag_verbose)
RETURN_IF_ERROR (result_append (dm, " [#0]"));
}
return STATUS_OK;
}
/* Demangle NAME into RESULT, which must be an initialized
dyn_string_t. On success, returns STATUS_OK. On failure, returns
an error message, and the contents of RESULT are unchanged. */
static status_t
cp_demangle (name, result)
const char *name;
dyn_string_t result;
{
status_t status;
int length = strlen (name);
if (length > 2 && name[0] == '_' && name[1] == 'Z')
{
demangling_t dm = demangling_new (name);
if (dm == NULL)
return STATUS_ALLOCATION_FAILED;
status = result_push (dm);
if (status != STATUS_OK)
{
demangling_delete (dm);
return status;
}
status = demangle_mangled_name (dm);
if (STATUS_NO_ERROR (status))
{
dyn_string_t demangled = (dyn_string_t) result_pop (dm);
if (!dyn_string_copy (result, demangled))
return STATUS_ALLOCATION_FAILED;
dyn_string_delete (demangled);
}
demangling_delete (dm);
}
else
{
/* It's evidently not a mangled C++ name. It could be the name
of something with C linkage, though, so just copy NAME into
RESULT. */
if (!dyn_string_copy_cstr (result, name))
return STATUS_ALLOCATION_FAILED;
status = STATUS_OK;
}
return status;
}
/* Demangle TYPE_NAME into RESULT, which must be an initialized
dyn_string_t. On success, returns STATUS_OK. On failiure, returns
an error message, and the contents of RESULT are unchanged. */
static status_t
cp_demangle_type (type_name, result)
const char* type_name;
dyn_string_t result;
{
status_t status;
demangling_t dm = demangling_new (type_name);
if (dm == NULL)
return STATUS_ALLOCATION_FAILED;
/* Demangle the type name. The demangled name is stored in dm. */
status = result_push (dm);
if (status != STATUS_OK)
{
demangling_delete (dm);
return status;
}
status = demangle_type (dm);
if (STATUS_NO_ERROR (status))
{
/* The demangling succeeded. Pop the result out of dm and copy
it into RESULT. */
dyn_string_t demangled = (dyn_string_t) result_pop (dm);
if (!dyn_string_copy (result, demangled))
return STATUS_ALLOCATION_FAILED;
dyn_string_delete (demangled);
}
/* Clean up. */
demangling_delete (dm);
return status;
}
#ifdef IN_LIBGCC2
extern char *__cxa_demangle PARAMS ((const char *, char *, size_t *, int *));
/* ABI-mandated entry point in the C++ runtime library for performing
demangling. MANGLED_NAME is a NUL-terminated character string
containing the name to be demangled.
OUTPUT_BUFFER is a region of memory, allocated with malloc, of
*LENGTH bytes, into which the demangled name is stored. If
OUTPUT_BUFFER is not long enough, it is expanded using realloc.
OUTPUT_BUFFER may instead be NULL; in that case, the demangled name
is placed in a region of memory allocated with malloc.
If LENGTH is non-NULL, the length of the buffer conaining the
demangled name, is placed in *LENGTH.
The return value is a pointer to the start of the NUL-terminated
demangled name, or NULL if the demangling fails. The caller is
responsible for deallocating this memory using free.
*STATUS is set to one of the following values:
0: The demangling operation succeeded.
-1: A memory allocation failiure occurred.
-2: MANGLED_NAME is not a valid name under the C++ ABI mangling rules.
-3: One of the arguments is invalid.
The demagling is performed using the C++ ABI mangling rules, with
GNU extensions. */
char *
__cxa_demangle (mangled_name, output_buffer, length, status)
const char *mangled_name;
char *output_buffer;
size_t *length;
int *status;
{
struct dyn_string demangled_name;
status_t result;
if (status == NULL)
return NULL;
if (mangled_name == NULL) {
*status = -3;
return NULL;
}
/* Did the caller provide a buffer for the demangled name? */
if (output_buffer == NULL) {
/* No; dyn_string will malloc a buffer for us. */
if (!dyn_string_init (&demangled_name, 0))
{
*status = -1;
return NULL;
}
}
else {
/* Yes. Check that the length was provided. */
if (length == NULL) {
*status = -3;
return NULL;
}
/* Install the buffer into a dyn_string. */
demangled_name.allocated = *length;
demangled_name.length = 0;
demangled_name.s = output_buffer;
}
if (mangled_name[0] == '_' && mangled_name[1] == 'Z')
/* MANGLED_NAME apprears to be a function or variable name.
Demangle it accordingly. */
result = cp_demangle (mangled_name, &demangled_name);
else
/* Try to demangled MANGLED_NAME as the name of a type. */
result = cp_demangle_type (mangled_name, &demangled_name);
if (result == STATUS_OK)
/* The demangling succeeded. */
{
/* If LENGTH isn't NULL, store the allocated buffer length
there; the buffer may have been realloced by dyn_string
functions. */
if (length != NULL)
*length = demangled_name.allocated;
/* The operation was a success. */
*status = 0;
return dyn_string_buf (&demangled_name);
}
else if (result == STATUS_ALLOCATION_FAILED)
/* A call to malloc or realloc failed during the demangling
operation. */
{
*status = -1;
return NULL;
}
else
/* The demangling failed for another reason, most probably because
MANGLED_NAME isn't a valid mangled name. */
{
/* If the buffer containing the demangled name wasn't provided
by the caller, free it. */
if (output_buffer == NULL)
free (dyn_string_buf (&demangled_name));
*status = -2;
return NULL;
}
}
#else /* !IN_LIBGCC2 */
/* Variant entry point for integration with the existing cplus-dem
demangler. Attempts to demangle MANGLED. If the demangling
succeeds, returns a buffer, allocated with malloc, containing the
demangled name. The caller must deallocate the buffer using free.
If the demangling failes, returns NULL. */
char *
cplus_demangle_new_abi (mangled)
const char* mangled;
{
/* Create a dyn_string to hold the demangled name. */
dyn_string_t demangled = dyn_string_new (0);
/* Attempt the demangling. */
status_t status = cp_demangle ((char *) mangled, demangled);
if (STATUS_NO_ERROR (status))
/* Demangling succeeded. */
{
/* Grab the demangled result from the dyn_string. It was
allocated with malloc, so we can return it directly. */
char *return_value = dyn_string_release (demangled);
/* Hand back the demangled name. */
return return_value;
}
else if (status == STATUS_ALLOCATION_FAILED)
{
fprintf (stderr, "Memory allocation failed.\n");
abort ();
}
else
/* Demangling failed. */
{
dyn_string_delete (demangled);
return NULL;
}
}
#endif /* IN_LIBGCC2 */
#ifdef STANDALONE_DEMANGLER
#include "getopt.h"
static void print_usage
PARAMS ((FILE* fp, int exit_value));
/* Non-zero if CHAR is a character than can occur in a mangled name. */
#define is_mangled_char(CHAR) \
(IS_ALPHA (CHAR) || IS_DIGIT (CHAR) || (CHAR) == '_')
/* The name of this program, as invoked. */
const char* program_name;
/* Prints usage summary to FP and then exits with EXIT_VALUE. */
static void
print_usage (fp, exit_value)
FILE* fp;
int exit_value;
{
fprintf (fp, "Usage: %s [options] [names ...]\n", program_name);
fprintf (fp, "Options:\n", program_name);
fprintf (fp, " -h,--help Display this message.\n");
fprintf (fp, " -s,--strict Demangle standard names only.\n");
fprintf (fp, " -v,--verbose Produce verbose demanglings.\n");
fprintf (fp, "If names are provided, they are demangled. Otherwise filters standard input.\n");
exit (exit_value);
}
/* Option specification for getopt_long. */
static struct option long_options[] =
{
{ "help", no_argument, NULL, 'h' },
{ "strict", no_argument, NULL, 's' },
{ "verbose", no_argument, NULL, 'v' },
{ NULL, no_argument, NULL, 0 },
};
/* Main entry for a demangling filter executable. It will demangle
its command line arguments, if any. If none are provided, it will
filter stdin to stdout, replacing any recognized mangled C++ names
with their demangled equivalents. */
int
main (argc, argv)
int argc;
char *argv[];
{
status_t status;
int i;
int opt_char;
/* Use the program name of this program, as invoked. */
program_name = argv[0];
/* Parse options. */
do
{
opt_char = getopt_long (argc, argv, "hsv", long_options, NULL);
switch (opt_char)
{
case '?': /* Unrecognized option. */
print_usage (stderr, 1);
break;
case 'h':
print_usage (stdout, 0);
break;
case 's':
flag_strict = 1;
break;
case 'v':
flag_verbose = 1;
break;
}
}
while (opt_char != -1);
if (optind == argc)
/* No command line arguments were provided. Filter stdin. */
{
dyn_string_t mangled = dyn_string_new (3);
dyn_string_t demangled = dyn_string_new (0);
status_t status;
/* Read all of input. */
while (!feof (stdin))
{
char c = getchar ();
/* The first character of a mangled name is an underscore. */
if (feof (stdin))
break;
if (c != '_')
{
/* It's not a mangled name. Print the character and go
on. */
putchar (c);
continue;
}
c = getchar ();
/* The second character of a mangled name is a capital `Z'. */
if (feof (stdin))
break;
if (c != 'Z')
{
/* It's not a mangled name. Print the previous
underscore, the `Z', and go on. */
putchar ('_');
putchar (c);
continue;
}
/* Start keeping track of the candidate mangled name. */
dyn_string_append_char (mangled, '_');
dyn_string_append_char (mangled, 'Z');
/* Pile characters into mangled until we hit one that can't
occur in a mangled name. */
c = getchar ();
while (!feof (stdin) && is_mangled_char (c))
{
dyn_string_append_char (mangled, c);
if (feof (stdin))
break;
c = getchar ();
}
/* Attempt to demangle the name. */
status = cp_demangle (dyn_string_buf (mangled), demangled);
/* If the demangling succeeded, great! Print out the
demangled version. */
if (STATUS_NO_ERROR (status))
fputs (dyn_string_buf (demangled), stdout);
/* Abort on allocation failures. */
else if (status == STATUS_ALLOCATION_FAILED)
{
fprintf (stderr, "Memory allocation failed.\n");
abort ();
}
/* Otherwise, it might not have been a mangled name. Just
print out the original text. */
else
fputs (dyn_string_buf (mangled), stdout);
/* If we haven't hit EOF yet, we've read one character that
can't occur in a mangled name, so print it out. */
if (!feof (stdin))
putchar (c);
/* Clear the candidate mangled name, to start afresh next
time we hit a `_Z'. */
dyn_string_clear (mangled);
}
dyn_string_delete (mangled);
dyn_string_delete (demangled);
}
else
/* Demangle command line arguments. */
{
dyn_string_t result = dyn_string_new (0);
/* Loop over command line arguments. */
for (i = optind; i < argc; ++i)
{
/* Attempt to demangle. */
status = cp_demangle (argv[i], result);
/* If it worked, print the demangled name. */
if (STATUS_NO_ERROR (status))
printf ("%s\n", dyn_string_buf (result));
/* Abort on allocaiton failures. */
else if (status == STATUS_ALLOCATION_FAILED)
{
fprintf (stderr, "Memory allocaiton failed.\n");
abort ();
}
/* If not, print the error message to stderr instead. */
else
fprintf (stderr, "%s\n", status);
}
dyn_string_delete (result);
}
return 0;
}
#endif /* STANDALONE_DEMANGLER */
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