#include "config.h"
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include "libgfortran.h"
#if defined (HAVE_GFC_INTEGER_8)
static void
cshift1 (gfc_array_char * const restrict ret,
const gfc_array_char * const restrict array,
const gfc_array_i8 * const restrict h,
const GFC_INTEGER_8 * const restrict pwhich,
index_type size)
{
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_8 *hptr;
index_type count[GFC_MAX_DIMENSIONS];
index_type extent[GFC_MAX_DIMENSIONS];
index_type dim;
index_type len;
index_type n;
int which;
GFC_INTEGER_8 sh;
if (pwhich)
which = *pwhich - 1;
else
which = 0;
if (which < 0 || (which + 1) > GFC_DESCRIPTOR_RANK (array))
runtime_error ("Argument 'DIM' is out of range in call to 'CSHIFT'");
if (ret->data == NULL)
{
int i;
ret->data = internal_malloc_size (size * size0 ((array_t *)array));
ret->offset = 0;
ret->dtype = array->dtype;
for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
{
ret->dim[i].lbound = 0;
ret->dim[i].ubound = array->dim[i].ubound - array->dim[i].lbound;
if (i == 0)
ret->dim[i].stride = 1;
else
ret->dim[i].stride = (ret->dim[i-1].ubound + 1) * ret->dim[i-1].stride;
}
}
extent[0] = 1;
count[0] = 0;
n = 0;
roffset = size;
soffset = size;
len = 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;
sh = (div (sh, len)).rem;
if (sh < 0)
sh += len;
src = &sptr[sh * soffset];
dest = rptr;
for (n = 0; n < len; n++)
{
memcpy (dest, src, size);
dest += roffset;
if (n == len - sh - 1)
src = sptr;
else
src += soffset;
}
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];
}
}
}
}
void cshift1_8 (gfc_array_char * const restrict,
const gfc_array_char * const restrict,
const gfc_array_i8 * const restrict,
const GFC_INTEGER_8 * const restrict);
export_proto(cshift1_8);
void
cshift1_8 (gfc_array_char * const restrict ret,
const gfc_array_char * const restrict array,
const gfc_array_i8 * const restrict h,
const GFC_INTEGER_8 * const restrict pwhich)
{
cshift1 (ret, array, h, pwhich, GFC_DESCRIPTOR_SIZE (array));
}
void cshift1_8_char (gfc_array_char * const restrict ret,
GFC_INTEGER_4,
const gfc_array_char * const restrict array,
const gfc_array_i8 * const restrict h,
const GFC_INTEGER_8 * const restrict pwhich,
GFC_INTEGER_4);
export_proto(cshift1_8_char);
void
cshift1_8_char (gfc_array_char * const restrict ret,
GFC_INTEGER_4 ret_length __attribute__((unused)),
const gfc_array_char * const restrict array,
const gfc_array_i8 * const restrict h,
const GFC_INTEGER_8 * const restrict pwhich,
GFC_INTEGER_4 array_length)
{
cshift1 (ret, array, h, pwhich, array_length);
}
#endif