binutils/budemang.c

   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 }