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/* Implementation of the ASSOCIATED intrinsic

   Copyright 2003, 2009 Free Software Foundation, Inc.

   Contributed by kejia Zhao (CCRG) <kejia_zh@yahoo.com.cn>

This file is part of the GNU Fortran 95 runtime library (libgfortran).

Libgfortran 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.

Libgfortran 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.

Under Section 7 of GPL version 3, you are granted additional

permissions described in the GCC Runtime Library Exception, version

3.1, as published by the Free Software Foundation.

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

a copy of the GCC Runtime Library Exception along with this program;

see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

<http://www.gnu.org/licenses/>.  */

#include "libgfortran.h"

extern int associated (const gfc_array_void *, const gfc_array_void *);

export_proto(associated);

int

associated (const gfc_array_void *pointer, const gfc_array_void *target)

{

  int n, rank;

  if (GFC_DESCRIPTOR_DATA (pointer) == NULL)

    return 0;

  if (GFC_DESCRIPTOR_DATA (pointer) != GFC_DESCRIPTOR_DATA (target))

    return 0;

  if (GFC_DESCRIPTOR_DTYPE (pointer) != GFC_DESCRIPTOR_DTYPE (target))

    return 0;

  rank = GFC_DESCRIPTOR_RANK (pointer);

  for (n = 0; n < rank; n++)

    {

      long extent;

      extent = GFC_DESCRIPTOR_EXTENT(pointer,n);

      if (extent != GFC_DESCRIPTOR_EXTENT(target,n))

        return 0;

      if (GFC_DESCRIPTOR_STRIDE(pointer,n) != GFC_DESCRIPTOR_STRIDE(target,n) && extent != 1)

        return 0;

      if (extent <= 0)

        return 0;

    }

  return 1;

}