Line data    Source code

       1             : /* Get string.
       2             :    Copyright (C) 2004 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Written by Ulrich Drepper <drepper@redhat.com>, 2004.
       5             : 
       6             :    This file is free software; you can redistribute it and/or modify
       7             :    it under the terms of either
       8             : 
       9             :      * the GNU Lesser General Public License as published by the Free
      10             :        Software Foundation; either version 3 of the License, or (at
      11             :        your option) any later version
      12             : 
      13             :    or
      14             : 
      15             :      * the GNU General Public License as published by the Free
      16             :        Software Foundation; either version 2 of the License, or (at
      17             :        your option) any later version
      18             : 
      19             :    or both in parallel, as here.
      20             : 
      21             :    elfutils is distributed in the hope that it will be useful, but
      22             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24             :    General Public License for more details.
      25             : 
      26             :    You should have received copies of the GNU General Public License and
      27             :    the GNU Lesser General Public License along with this program.  If
      28             :    not, see <http://www.gnu.org/licenses/>.  */
      29             : 
      30             : #ifdef HAVE_CONFIG_H
      31             : # include <config.h>
      32             : #endif
      33             : 
      34             : #include <string.h>
      35             : #include "libdwP.h"
      36             : 
      37             : 
      38             : const char *
      39         870 : dwarf_getstring (Dwarf *dbg, Dwarf_Off offset, size_t *lenp)
      40             : {
      41         870 :   if (dbg == NULL)
      42             :     return NULL;
      43             : 
      44         869 :   if (dbg->sectiondata[IDX_debug_str] == NULL
      45         869 :       || offset >= dbg->sectiondata[IDX_debug_str]->d_size)
      46             :     {
      47           1 :     no_string:
      48           1 :       __libdw_seterrno (DWARF_E_NO_STRING);
      49           1 :       return NULL;
      50             :     }
      51             : 
      52         868 :   const char *result = ((const char *) dbg->sectiondata[IDX_debug_str]->d_buf
      53             :                         + offset);
      54         868 :   const char *endp = memchr (result, '\0',
      55             :                              dbg->sectiondata[IDX_debug_str]->d_size - offset);
      56         868 :   if (endp == NULL)
      57             :     goto no_string;
      58             : 
      59         868 :   if (lenp != NULL)
      60         100 :     *lenp = endp - result;
      61             : 
      62             :   return result;
      63             : }