/* Copyright (C) 2011 Red Hat, Inc.

   This file is part of elfutils.

   Written by Marek Polacek <mpolacek@redhat.com>, 2011.

   This file is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   elfutils is distributed in the hope that it will be useful, but

   WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include ELFUTILS_HEADER(dwfl)

#include <assert.h>

#include <dwarf.h>

#include <fcntl.h>

#include <stdio.h>

#include <unistd.h>

int

main (int argc, char *argv[])

{

  int cnt;

  for (cnt = 1; cnt < argc; ++cnt)

    {

      Dwarf_Off offset = 0;

      size_t len;

      int fd = open (argv[cnt], O_RDONLY);

      if (fd == -1)

	{

	  printf ("cannot open '%s': %m\n", argv[cnt]);

	  return 1;

	}

      Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);

      if (dbg == NULL)

	{

	  printf ("%s not usable: %s\n", argv[cnt], dwarf_errmsg (-1));

	  close (fd);

	  return 1;

	}

      /* Try to use NULL Dwarf object.  */

      const char *str = dwarf_getstring (NULL, offset, &len;;

      assert (str == NULL);

      /* Use insane offset.  */

      str = dwarf_getstring (dbg, ~0UL, &len;;

      assert (str == NULL);

      /* Now do some real work.  */

      for (int i = 0; i < 100; ++i)

	{

	  str = dwarf_getstring (dbg, offset, &len;;

	  puts (str);

	  /* Advance.  */

	  offset += len + 1;

	}

      dwarf_end (dbg);

      close (fd);

    }

  return 0;

}