/* Generic implementation of the RESHAPE intrinsic
- Copyright 2002 Free Software Foundation, Inc.
+ Copyright 2002, 2006, 2007 Free Software Foundation, Inc.
Contributed by Paul Brook <paul@nowt.org>
This file is part of the GNU Fortran 95 runtime library (libgfortran).
write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
-#include "config.h"
+#include "libgfortran.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
-#include "libgfortran.h"
typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
typedef GFC_ARRAY_DESCRIPTOR(GFC_MAX_DIMENSIONS, char) parray;
-extern void reshape (parray *, parray *, shape_type *, parray *, shape_type *);
-export_proto(reshape);
-
-/* The shape parameter is ignored. We can currently deduce the shape from the
- return array. */
-
-void
-reshape (parray *ret, parray *source, shape_type *shape,
- parray *pad, shape_type *order)
+static void
+reshape_internal (parray *ret, parray *source, shape_type *shape,
+ parray *pad, shape_type *order, index_type size)
{
/* r.* indicates the return array. */
index_type rcount[GFC_MAX_DIMENSIONS];
index_type rsize;
index_type rs;
index_type rex;
- char *rptr;
+ char * restrict rptr;
/* s.* indicates the source array. */
index_type scount[GFC_MAX_DIMENSIONS];
index_type sextent[GFC_MAX_DIMENSIONS];
const char *src;
int n;
int dim;
- int size;
+ int sempty, pempty, shape_empty;
+ index_type shape_data[GFC_MAX_DIMENSIONS];
+
+ rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
+ if (rdim != GFC_DESCRIPTOR_RANK(ret))
+ runtime_error("rank of return array incorrect in RESHAPE intrinsic");
- if (source->dim[0].stride == 0)
- source->dim[0].stride = 1;
- if (shape->dim[0].stride == 0)
- shape->dim[0].stride = 1;
- if (pad && pad->dim[0].stride == 0)
- pad->dim[0].stride = 1;
- if (order && order->dim[0].stride == 0)
- order->dim[0].stride = 1;
+ shape_empty = 0;
+
+ for (n = 0; n < rdim; n++)
+ {
+ shape_data[n] = shape->data[n * shape->dim[0].stride];
+ if (shape_data[n] <= 0)
+ {
+ shape_data[n] = 0;
+ shape_empty = 1;
+ }
+ }
if (ret->data == NULL)
{
- size = GFC_DESCRIPTOR_SIZE (ret);
rdim = shape->dim[0].ubound - shape->dim[0].lbound + 1;
rs = 1;
- for (n=0; n < rdim; n++)
+ for (n = 0; n < rdim; n++)
{
ret->dim[n].lbound = 0;
- rex = shape->data[n * shape->dim[0].stride];
+ rex = shape_data[n];
ret->dim[n].ubound = rex - 1;
ret->dim[n].stride = rs;
rs *= rex;
ret->data = internal_malloc_size ( rs * size );
ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
}
- else
+
+ if (shape_empty)
+ return;
+
+ if (unlikely (compile_options.bounds_check))
{
- size = GFC_DESCRIPTOR_SIZE (ret);
- rdim = GFC_DESCRIPTOR_RANK (ret);
- if (ret->dim[0].stride == 0)
- ret->dim[0].stride = 1;
+ index_type ret_extent, source_extent;
+
+ rs = 1;
+ for (n = 0; n < rdim; n++)
+ {
+ rs *= shape_data[n];
+ ret_extent = ret->dim[n].ubound + 1 - ret->dim[n].lbound;
+ if (ret_extent != shape_data[n])
+ runtime_error("Incorrect extent in return value of RESHAPE"
+ " intrinsic in dimension %ld: is %ld,"
+ " should be %ld", (long int) n+1,
+ (long int) ret_extent, (long int) shape_data[n]);
+ }
+
+ source_extent = source->dim[0].ubound + 1 - source->dim[0].lbound;
+
+ if (rs < source_extent || (rs > source_extent && !pad))
+ runtime_error("Incorrect size in SOURCE argument to RESHAPE"
+ " intrinsic: is %ld, should be %ld",
+ (long int) source_extent, (long int) rs);
+
+ if (order)
+ {
+ int seen[GFC_MAX_DIMENSIONS];
+ index_type v;
+
+ for (n = 0; n < rdim; n++)
+ seen[n] = 0;
+
+ for (n = 0; n < rdim; n++)
+ {
+ v = order->data[n * order->dim[0].stride] - 1;
+
+ if (v < 0 || v >= rdim)
+ runtime_error("Value %ld out of range in ORDER argument"
+ " to RESHAPE intrinsic", (long int) v + 1);
+
+ if (seen[v] != 0)
+ runtime_error("Duplicate value %ld in ORDER argument to"
+ " RESHAPE intrinsic", (long int) v + 1);
+
+ seen[v] = 1;
+ }
+ }
}
rsize = 1;
rstride[n] = ret->dim[dim].stride;
rextent[n] = ret->dim[dim].ubound + 1 - ret->dim[dim].lbound;
- if (rextent[n] != shape->data[dim * shape->dim[0].stride])
+ if (rextent[n] != shape_data[dim])
runtime_error ("shape and target do not conform");
if (rsize == rstride[n])
sdim = GFC_DESCRIPTOR_RANK (source);
ssize = 1;
+ sempty = 0;
for (n = 0; n < sdim; n++)
{
scount[n] = 0;
sstride[n] = source->dim[n].stride;
sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
if (sextent[n] <= 0)
- abort ();
+ {
+ sempty = 1;
+ sextent[n] = 0;
+ }
if (ssize == sstride[n])
ssize *= sextent[n];
{
pdim = GFC_DESCRIPTOR_RANK (pad);
psize = 1;
+ pempty = 0;
for (n = 0; n < pdim; n++)
{
pcount[n] = 0;
pstride[n] = pad->dim[n].stride;
pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
if (pextent[n] <= 0)
- abort ();
+ {
+ pempty = 1;
+ pextent[n] = 0;
+ }
+
if (psize == pstride[n])
psize *= pextent[n];
else
{
pdim = 0;
psize = 1;
+ pempty = 1;
pptr = NULL;
}
rstride0 = rstride[0] * size;
sstride0 = sstride[0] * size;
+ if (sempty && pempty)
+ abort ();
+
+ if (sempty)
+ {
+ /* Pretend we are using the pad array the first time around, too. */
+ src = pptr;
+ sptr = pptr;
+ sdim = pdim;
+ for (dim = 0; dim < pdim; dim++)
+ {
+ scount[dim] = pcount[dim];
+ sextent[dim] = pextent[dim];
+ sstride[dim] = pstride[dim];
+ sstride0 = pstride[0] * size;
+ }
+ }
+
while (rptr)
{
/* Select between the source and pad arrays. */
src += sstride0;
rcount[0]++;
scount[0]++;
+
/* Advance to the next destination element. */
n = 0;
while (rcount[n] == rextent[n])
the next dimension. */
rcount[n] = 0;
/* We could precalculate these products, but this is a less
- frequently used path so proabably not worth it. */
+ frequently used path so probably not worth it. */
rptr -= rstride[n] * rextent[n] * size;
n++;
if (n == rdim)
rcount[n]++;
rptr += rstride[n] * size;
}
- }
+ }
+
/* Advance to the next source element. */
n = 0;
while (scount[n] == sextent[n])
the next dimension. */
scount[n] = 0;
/* We could precalculate these products, but this is a less
- frequently used path so proabably not worth it. */
+ frequently used path so probably not worth it. */
src -= sstride[n] * sextent[n] * size;
n++;
if (n == sdim)
else
{
scount[n]++;
- sptr += sstride[n] * size;
+ src += sstride[n] * size;
}
}
}
}
+
+extern void reshape (parray *, parray *, shape_type *, parray *, shape_type *);
+export_proto(reshape);
+
+void
+reshape (parray *ret, parray *source, shape_type *shape, parray *pad,
+ shape_type *order)
+{
+ reshape_internal (ret, source, shape, pad, order,
+ GFC_DESCRIPTOR_SIZE (source));
+}
+
+
+extern void reshape_char (parray *, gfc_charlen_type, parray *, shape_type *,
+ parray *, shape_type *, gfc_charlen_type,
+ gfc_charlen_type);
+export_proto(reshape_char);
+
+void
+reshape_char (parray *ret, gfc_charlen_type ret_length __attribute__((unused)),
+ parray *source, shape_type *shape, parray *pad,
+ shape_type *order, gfc_charlen_type source_length,
+ gfc_charlen_type pad_length __attribute__((unused)))
+{
+ reshape_internal (ret, source, shape, pad, order, source_length);
+}
+
+
+extern void reshape_char4 (parray *, gfc_charlen_type, parray *, shape_type *,
+ parray *, shape_type *, gfc_charlen_type,
+ gfc_charlen_type);
+export_proto(reshape_char4);
+
+void
+reshape_char4 (parray *ret, gfc_charlen_type ret_length __attribute__((unused)),
+ parray *source, shape_type *shape, parray *pad,
+ shape_type *order, gfc_charlen_type source_length,
+ gfc_charlen_type pad_length __attribute__((unused)))
+{
+ reshape_internal (ret, source, shape, pad, order,
+ source_length * sizeof (gfc_char4_t));
+}
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