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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgfortran/] [generated/] [in_pack_i2.c] - Blame information for rev 733

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1 733 jeremybenn
/* Helper function for repacking arrays.
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   Copyright 2003, 2006, 2007, 2009 Free Software Foundation, Inc.
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   Contributed by Paul Brook <paul@nowt.org>
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This file is part of the GNU Fortran 95 runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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<http://www.gnu.org/licenses/>.  */
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#include "libgfortran.h"
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#include <stdlib.h>
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#include <assert.h>
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#if defined (HAVE_GFC_INTEGER_2)
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/* Allocates a block of memory with internal_malloc if the array needs
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   repacking.  */
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GFC_INTEGER_2 *
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internal_pack_2 (gfc_array_i2 * source)
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{
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  index_type count[GFC_MAX_DIMENSIONS];
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  index_type extent[GFC_MAX_DIMENSIONS];
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  index_type stride[GFC_MAX_DIMENSIONS];
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  index_type stride0;
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  index_type dim;
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  index_type ssize;
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  const GFC_INTEGER_2 *src;
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  GFC_INTEGER_2 * restrict dest;
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  GFC_INTEGER_2 *destptr;
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  int n;
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  int packed;
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  /* TODO: Investigate how we can figure out if this is a temporary
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     since the stride=0 thing has been removed from the frontend.  */
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  dim = GFC_DESCRIPTOR_RANK (source);
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  ssize = 1;
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  packed = 1;
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  for (n = 0; n < dim; n++)
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    {
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      count[n] = 0;
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      stride[n] = GFC_DESCRIPTOR_STRIDE(source,n);
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      extent[n] = GFC_DESCRIPTOR_EXTENT(source,n);
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      if (extent[n] <= 0)
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        {
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          /* Do nothing.  */
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          packed = 1;
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          break;
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        }
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      if (ssize != stride[n])
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        packed = 0;
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      ssize *= extent[n];
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    }
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  if (packed)
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    return source->data;
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  /* Allocate storage for the destination.  */
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  destptr = (GFC_INTEGER_2 *)internal_malloc_size (ssize * sizeof (GFC_INTEGER_2));
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  dest = destptr;
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  src = source->data;
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  stride0 = stride[0];
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  while (src)
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    {
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      /* Copy the data.  */
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      *(dest++) = *src;
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      /* Advance to the next element.  */
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      src += stride0;
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      count[0]++;
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      /* Advance to the next source element.  */
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      n = 0;
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      while (count[n] == extent[n])
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        {
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          /* When we get to the end of a dimension, reset it and increment
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             the next dimension.  */
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          count[n] = 0;
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          /* We could precalculate these products, but this is a less
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             frequently used path so probably not worth it.  */
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          src -= stride[n] * extent[n];
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          n++;
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          if (n == dim)
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            {
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              src = NULL;
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              break;
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            }
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          else
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            {
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              count[n]++;
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              src += stride[n];
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            }
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        }
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    }
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  return destptr;
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}
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#endif
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