/* Generic implementation of the EOSHIFT intrinsic
- Copyright 2002 Free Software Foundation, Inc.
+ Copyright 2002, 2005 Free Software Foundation, Inc.
Contributed by Paul Brook <paul@nowt.org>
This file is part of the GNU Fortran 95 runtime library (libgfortran).
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. */
+write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include "libgfortran.h"
-static const char zeros[16] =
- {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
/* TODO: make this work for large shifts when
sizeof(int) < sizeof (index_type). */
static void
eoshift0 (gfc_array_char * ret, const gfc_array_char * array,
- int shift, const char * pbound, int which)
+ int shift, const char * pbound, int which, index_type size,
+ char filler)
{
/* r.* indicates the return array. */
- index_type rstride[GFC_MAX_DIMENSIONS - 1];
+ index_type rstride[GFC_MAX_DIMENSIONS];
index_type rstride0;
index_type roffset;
char *rptr;
char *dest;
/* s.* indicates the source array. */
- index_type sstride[GFC_MAX_DIMENSIONS - 1];
+ index_type sstride[GFC_MAX_DIMENSIONS];
index_type sstride0;
index_type soffset;
const char *sptr;
const char *src;
- index_type count[GFC_MAX_DIMENSIONS - 1];
- index_type extent[GFC_MAX_DIMENSIONS - 1];
+ index_type count[GFC_MAX_DIMENSIONS];
+ index_type extent[GFC_MAX_DIMENSIONS];
index_type dim;
- index_type size;
index_type len;
index_type n;
- if (!pbound)
- pbound = zeros;
-
- size = GFC_DESCRIPTOR_SIZE (ret);
+ /* The compiler cannot figure out that these are set, initialize
+ them to avoid warnings. */
+ len = 0;
+ soffset = 0;
+ roffset = 0;
if (ret->data == NULL)
{
int i;
ret->data = internal_malloc_size (size * size0 ((array_t *)array));
- ret->base = 0;
+ ret->offset = 0;
ret->dtype = array->dtype;
for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
{
extent[0] = 1;
count[0] = 0;
- size = GFC_DESCRIPTOR_SIZE (array);
n = 0;
for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
{
sstride0 = sstride[0];
rptr = ret->data;
sptr = array->data;
- if (shift > 0)
- len = len - shift;
+
+ if ((shift >= 0 ? shift : -shift) > len)
+ {
+ shift = len;
+ len = 0;
+ }
else
- len = len + shift;
+ {
+ if (shift > 0)
+ len = len - shift;
+ else
+ len = len + shift;
+ }
while (rptr)
{
n = -shift;
}
- while (n--)
- {
- memcpy (dest, pbound, size);
- dest += roffset;
- }
+ if (pbound)
+ while (n--)
+ {
+ memcpy (dest, pbound, size);
+ dest += roffset;
+ }
+ else
+ while (n--)
+ {
+ memset (dest, filler, size);
+ dest += roffset;
+ }
/* Advance to the next section. */
rptr += rstride0;
}
-extern void eoshift0_1 (gfc_array_char *, const gfc_array_char *,
- const GFC_INTEGER_1 *, const char *,
- const GFC_INTEGER_1 *);
-export_proto(eoshift0_1);
-
-void
-eoshift0_1 (gfc_array_char *ret, const gfc_array_char *array,
- const GFC_INTEGER_1 *pshift, const char *pbound,
- const GFC_INTEGER_1 *pdim)
-{
- eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1);
-}
-
-
-extern void eoshift0_2 (gfc_array_char *, const gfc_array_char *,
- const GFC_INTEGER_2 *, const char *,
- const GFC_INTEGER_2 *);
-export_proto(eoshift0_2);
-
-void
-eoshift0_2 (gfc_array_char *ret, const gfc_array_char *array,
- const GFC_INTEGER_2 *pshift, const char *pbound,
- const GFC_INTEGER_2 *pdim)
-{
- eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1);
-}
-
-
-extern void eoshift0_4 (gfc_array_char *, const gfc_array_char *,
- const GFC_INTEGER_4 *, const char *,
- const GFC_INTEGER_4 *);
-export_proto(eoshift0_4);
-
-void
-eoshift0_4 (gfc_array_char *ret, const gfc_array_char *array,
- const GFC_INTEGER_4 *pshift, const char *pbound,
- const GFC_INTEGER_4 *pdim)
-{
- eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1);
-}
-
-
-extern void eoshift0_8 (gfc_array_char *, const gfc_array_char *,
- const GFC_INTEGER_8 *, const char *,
- const GFC_INTEGER_8 *);
-export_proto(eoshift0_8);
-
-void
-eoshift0_8 (gfc_array_char *ret, const gfc_array_char *array,
- const GFC_INTEGER_8 *pshift, const char *pbound,
- const GFC_INTEGER_8 *pdim)
-{
- eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1);
-}
-
+#define DEFINE_EOSHIFT(N) \
+ extern void eoshift0_##N (gfc_array_char *, const gfc_array_char *, \
+ const GFC_INTEGER_##N *, const char *, \
+ const GFC_INTEGER_##N *); \
+ export_proto(eoshift0_##N); \
+ \
+ void \
+ eoshift0_##N (gfc_array_char *ret, const gfc_array_char *array, \
+ const GFC_INTEGER_##N *pshift, const char *pbound, \
+ const GFC_INTEGER_##N *pdim) \
+ { \
+ eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1, \
+ GFC_DESCRIPTOR_SIZE (array), 0); \
+ } \
+ \
+ extern void eoshift0_##N##_char (gfc_array_char *, GFC_INTEGER_4, \
+ const gfc_array_char *, \
+ const GFC_INTEGER_##N *, const char *, \
+ const GFC_INTEGER_##N *, GFC_INTEGER_4, \
+ GFC_INTEGER_4); \
+ export_proto(eoshift0_##N##_char); \
+ \
+ void \
+ eoshift0_##N##_char (gfc_array_char *ret, \
+ GFC_INTEGER_4 ret_length __attribute__((unused)), \
+ const gfc_array_char *array, \
+ const GFC_INTEGER_##N *pshift, \
+ const char *pbound, \
+ const GFC_INTEGER_##N *pdim, \
+ GFC_INTEGER_4 array_length, \
+ GFC_INTEGER_4 bound_length __attribute__((unused))) \
+ { \
+ eoshift0 (ret, array, *pshift, pbound, pdim ? *pdim : 1, \
+ array_length, ' '); \
+ }
+
+DEFINE_EOSHIFT (1);
+DEFINE_EOSHIFT (2);
+DEFINE_EOSHIFT (4);
+DEFINE_EOSHIFT (8);
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