| /* Helper function for repacking arrays. |
| Copyright 2003, 2006, 2007, 2009 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 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" |
| #include <stdlib.h> |
| #include <assert.h> |
| #include <string.h> |
| |
| |
| #if defined (HAVE_GFC_REAL_8) |
| |
| void |
| internal_unpack_r8 (gfc_array_r8 * d, const GFC_REAL_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_REAL_8 * restrict dest; |
| int n; |
| |
| dest = d->data; |
| if (src == dest || !src) |
| return; |
| |
| 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) |
| return; |
| |
| if (dsize == stride[n]) |
| dsize *= extent[n]; |
| else |
| dsize = 0; |
| } |
| |
| if (dsize != 0) |
| { |
| memcpy (dest, src, dsize * sizeof (GFC_REAL_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 probably not worth it. */ |
| dest -= stride[n] * extent[n]; |
| n++; |
| if (n == dim) |
| { |
| dest = NULL; |
| break; |
| } |
| else |
| { |
| count[n]++; |
| dest += stride[n]; |
| } |
| } |
| } |
| } |
| |
| #endif |
| |