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 
38 char *
39 demangle (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