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+/* Helper function for repacking arrays.
+ Copyright 2003 Free Software Foundation, Inc.
+ Contributed by Paul Brook <paul@nowt.org>
+
+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 2 of the License, or (at your option) any later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file. (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+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.
+
+You should have received a copy of the GNU General Public
+License along with libgfortran; see the file COPYING. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include "libgfortran.h"
+
+void
+internal_unpack_c8 (gfc_array_c8 * d, const GFC_COMPLEX_8 * src)
+{
+ index_type count[GFC_MAX_DIMENSIONS];
+ index_type extent[GFC_MAX_DIMENSIONS];
+ index_type stride[GFC_MAX_DIMENSIONS];
+ index_type stride0;
+ index_type dim;
+ index_type dsize;
+ GFC_COMPLEX_8 *dest;
+ int n;
+
+ dest = d->data;
+ if (src == dest || !src)
+ return;
+
+ if (d->dim[0].stride == 0)
+ d->dim[0].stride = 1;
+
+ dim = GFC_DESCRIPTOR_RANK (d);
+ dsize = 1;
+ for (n = 0; n < dim; n++)
+ {
+ count[n] = 0;
+ stride[n] = d->dim[n].stride;
+ extent[n] = d->dim[n].ubound + 1 - d->dim[n].lbound;
+ if (extent[n] <= 0)
+ abort ();
+
+ if (dsize == stride[n])
+ dsize *= extent[n];
+ else
+ dsize = 0;
+ }
+
+ if (dsize != 0)
+ {
+ memcpy (dest, src, dsize * sizeof (GFC_COMPLEX_8));
+ return;
+ }
+
+ stride0 = stride[0];
+
+ while (dest)
+ {
+ /* Copy the data. */
+ *dest = *(src++);
+ /* Advance to the next element. */
+ dest += stride0;
+ count[0]++;
+ /* Advance to the next source element. */
+ n = 0;
+ while (count[n] == extent[n])
+ {
+ /* When we get to the end of a dimension, reset it and increment
+ the next dimension. */
+ count[n] = 0;
+ /* We could precalculate these products, but this is a less
+ frequently used path so proabably not worth it. */
+ dest -= stride[n] * extent[n];
+ n++;
+ if (n == dim)
+ {
+ dest = NULL;
+ break;
+ }
+ else
+ {
+ count[n]++;
+ dest += stride[n];
+ }
+ }
+ }
+}
+