#include "config.h"
#include <stdlib.h>
#include <assert.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};
extern void eoshift1_4 (const gfc_array_char *,
const gfc_array_char *,
const gfc_array_i4 *, const char *,
const GFC_INTEGER_4 *);
export_proto(eoshift1_4);
void
eoshift1_4 (const gfc_array_char *ret,
const gfc_array_char *array,
const gfc_array_i4 *h, const char *pbound,
const GFC_INTEGER_4 *pwhich)
{
index_type rstride[GFC_MAX_DIMENSIONS];
index_type rstride0;
index_type roffset;
char *rptr;
char *dest;
index_type sstride[GFC_MAX_DIMENSIONS];
index_type sstride0;
index_type soffset;
const char *sptr;
const char *src;
index_type hstride[GFC_MAX_DIMENSIONS];
index_type hstride0;
const GFC_INTEGER_4 *hptr;
index_type count[GFC_MAX_DIMENSIONS];
index_type extent[GFC_MAX_DIMENSIONS];
index_type dim;
index_type size;
index_type len;
index_type n;
int which;
GFC_INTEGER_4 sh;
GFC_INTEGER_4 delta;
if (pwhich)
which = *pwhich - 1;
else
which = 0;
if (!pbound)
pbound = zeros;
size = GFC_DESCRIPTOR_SIZE (ret);
extent[0] = 1;
count[0] = 0;
size = GFC_DESCRIPTOR_SIZE (array);
n = 0;
for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
{
if (dim == which)
{
roffset = ret->dim[dim].stride * size;
if (roffset == 0)
roffset = size;
soffset = array->dim[dim].stride * size;
if (soffset == 0)
soffset = size;
len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
}
else
{
count[n] = 0;
extent[n] = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
rstride[n] = ret->dim[dim].stride * size;
sstride[n] = array->dim[dim].stride * size;
hstride[n] = h->dim[n].stride;
n++;
}
}
if (sstride[0] == 0)
sstride[0] = size;
if (rstride[0] == 0)
rstride[0] = size;
if (hstride[0] == 0)
hstride[0] = 1;
dim = GFC_DESCRIPTOR_RANK (array);
rstride0 = rstride[0];
sstride0 = sstride[0];
hstride0 = hstride[0];
rptr = ret->data;
sptr = array->data;
hptr = h->data;
while (rptr)
{
sh = *hptr;
delta = (sh >= 0) ? sh: -sh;
if (sh > 0)
{
src = &sptr[delta * soffset];
dest = rptr;
}
else
{
src = sptr;
dest = &rptr[delta * roffset];
}
for (n = 0; n < len - delta; n++)
{
memcpy (dest, src, size);
dest += roffset;
src += soffset;
}
if (sh < 0)
dest = rptr;
n = delta;
while (n--)
{
memcpy (dest, pbound, size);
dest += roffset;
}
rptr += rstride0;
sptr += sstride0;
hptr += hstride0;
count[0]++;
n = 0;
while (count[n] == extent[n])
{
count[n] = 0;
rptr -= rstride[n] * extent[n];
sptr -= sstride[n] * extent[n];
hptr -= hstride[n] * extent[n];
n++;
if (n >= dim - 1)
{
rptr = NULL;
break;
}
else
{
count[n]++;
rptr += rstride[n];
sptr += sstride[n];
hptr += hstride[n];
}
}
}
}