1/* demangle.c -- A wrapper calling libiberty cplus_demangle
2   Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
3
4   This file is part of GNU Binutils.
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2 of the License, or
9   (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program; if not, write to the Free Software
18   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
19   02110-1301, USA.  */
20
21#include "config.h"
22#include <stdlib.h>
23#ifdef HAVE_STRING_H
24#include <string.h>
25#else
26#ifdef HAVE_STRINGS_H
27#include <strings.h>
28#endif
29#endif
30#include "bfd.h"
31#include "libiberty.h"
32#include "demangle.h"
33#include "budemang.h"
34
35/* Wrapper around cplus_demangle.  Strips leading underscores and
36   other such chars that would otherwise confuse the demangler.  */
37
38char *
39demangle (bfd *abfd, const char *name)
40{
41  char *res, *alloc;
42  const char *pre, *suf;
43  size_t pre_len;
44
45  if (abfd != NULL && bfd_get_symbol_leading_char (abfd) == name[0])
46    ++name;
47
48  /* This is a hack for better error reporting on XCOFF, PowerPC64-ELF
49     or the MS PE format.  These formats have a number of leading '.'s
50     on at least some symbols, so we remove all dots to avoid
51     confusing the demangler.  */
52  pre = name;
53  while (*name == '.')
54    ++name;
55  pre_len = name - pre;
56
57  alloc = NULL;
58  suf = strchr (name, '@');
59  if (suf != NULL)
60    {
61      alloc = xmalloc (suf - name + 1);
62      memcpy (alloc, name, suf - name);
63      alloc[suf - name] = '\0';
64      name = alloc;
65    }
66
67  res = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
68  if (res != NULL)
69    {
70      /* Now put back any suffix, or stripped dots.  */
71      if (pre_len != 0 || suf != NULL)
72	{
73	  size_t len;
74	  size_t suf_len;
75	  char *final;
76
77	  if (alloc != NULL)
78	    free (alloc);
79
80	  len = strlen (res);
81	  if (suf == NULL)
82	    suf = res + len;
83	  suf_len = strlen (suf) + 1;
84	  final = xmalloc (pre_len + len + suf_len);
85
86	  memcpy (final, pre, pre_len);
87	  memcpy (final + pre_len, res, len);
88	  memcpy (final + pre_len + len, suf, suf_len);
89	  free (res);
90	  res = final;
91	}
92
93      return res;
94    }
95
96  if (alloc != NULL)
97    free (alloc);
98
99  return xstrdup (pre);
100}
101