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       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                 :          0 :     goto no_string;
      58                 :            : 
      59         [ +  + ]:        868 :   if (lenp != NULL)
      60                 :        100 :     *lenp = endp - result;
      61                 :            : 
      62                 :            :   return result;
      63                 :            : }