mirror of git://gcc.gnu.org/git/gcc.git
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/* Implementation of the TRANSPOSE intrinsic
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Copyright 2003 Free Software Foundation, Inc.
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Contributed by Tobias Schlüter
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This file is part of the GNU Fortran 95 runtime library (libgfor).
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Libgfor is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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Ligbfor 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with libgfor; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "libgfortran.h"
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extern void transpose (gfc_array_char *, gfc_array_char *);
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export_proto(transpose);
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void
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transpose (gfc_array_char *ret, gfc_array_char *source)
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{
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/* r.* indicates the return array. */
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index_type rxstride, rystride;
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char *rptr;
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/* s.* indicates the source array. */
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index_type sxstride, systride;
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const char *sptr;
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index_type xcount, ycount;
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index_type x, y;
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index_type size;
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assert (GFC_DESCRIPTOR_RANK (source) == 2
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&& GFC_DESCRIPTOR_RANK (ret) == 2);
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size = GFC_DESCRIPTOR_SIZE (source);
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if (ret->data == NULL)
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{
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assert (ret->dtype == source->dtype);
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ret->dim[0].lbound = 0;
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ret->dim[0].ubound = source->dim[1].ubound - source->dim[1].lbound;
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ret->dim[0].stride = 1;
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ret->dim[1].lbound = 0;
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ret->dim[1].ubound = source->dim[0].ubound - source->dim[0].lbound;
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ret->dim[1].stride = ret->dim[0].ubound+1;
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ret->data = internal_malloc_size (size * size0 ((array_t*)ret));
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ret->base = 0;
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}
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sxstride = source->dim[0].stride * size;
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if (sxstride == 0)
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sxstride = size;
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systride = source->dim[1].stride * size;
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xcount = source->dim[0].ubound + 1 - source->dim[0].lbound;
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ycount = source->dim[1].ubound + 1 - source->dim[1].lbound;
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rxstride = ret->dim[0].stride * size;
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if (rxstride == 0)
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rxstride = size;
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rystride = ret->dim[1].stride * size;
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rptr = ret->data;
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sptr = source->data;
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for (y = 0; y < ycount; y++)
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{
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for (x = 0; x < xcount; x++)
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{
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memcpy (rptr, sptr, size);
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sptr += sxstride;
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rptr += rystride;
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}
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sptr += systride - (sxstride * xcount);
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rptr += rxstride - (rystride * xcount);
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}
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}
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