/* Return tag of given DIE.

   Copyright (C) 2003-2011, 2014 Red Hat, Inc.

   This file is part of elfutils.

   Written by Ulrich Drepper <drepper@redhat.com>, 2003.

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

   it under the terms of either

     * the GNU Lesser General Public License as published by the Free

       Software Foundation; either version 3 of the License, or (at

       your option) any later version

   or

     * the GNU General Public License as published by the Free

       Software Foundation; either version 2 of the License, or (at

       your option) any later version

   or both in parallel, as here.

   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 copies of the GNU General Public License and

   the GNU Lesser General Public License along with this program.  If

   not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include "libdwP.h"

Dwarf_Abbrev *

internal_function

__libdw_findabbrev (struct Dwarf_CU *cu, unsigned int code)

{

  Dwarf_Abbrev *abb;

  /* Abbreviation code can never have a value of 0.  */

  if (unlikely (code == 0))

    return DWARF_END_ABBREV;

  /* See whether the entry is already in the hash table.  */

  abb = Dwarf_Abbrev_Hash_find (&cu->abbrev_hash, code);

  if (abb == NULL)

    while (cu->last_abbrev_offset != (size_t) -1l)

      {

	size_t length;

	/* Find the next entry.  It gets automatically added to the

	   hash table.  */

	abb = __libdw_getabbrev (cu->dbg, cu, cu->last_abbrev_offset, &length,

				 NULL);

	if (abb == NULL || abb == DWARF_END_ABBREV)

	  {

	    /* Make sure we do not try to search for it again.  */

	    cu->last_abbrev_offset = (size_t) -1l;

	    return DWARF_END_ABBREV;

	  }

	cu->last_abbrev_offset += length;

	/* Is this the code we are looking for?  */

	if (abb->code == code)

	  break;

      }

  /* This is our second (or third, etc.) call to __libdw_findabbrev

     and the code is invalid.  */

  if (unlikely (abb == NULL))

    abb = DWARF_END_ABBREV;

  return abb;

}

int

dwarf_tag (Dwarf_Die *die)

{

  /* Find the abbreviation entry.  */

  Dwarf_Abbrev *abbrevp = __libdw_dieabbrev (die, NULL);

  if (unlikely (abbrevp == DWARF_END_ABBREV))

    {

      __libdw_seterrno (DWARF_E_INVALID_DWARF);

      return DW_TAG_invalid;

    }

  return abbrevp->tag;

}

INTDEF(dwarf_tag)