C++ GFOR_POINTER_TO_L1函數代碼示例

void
pack_i1 (gfc_array_i1 *ret, const gfc_array_i1 *array,
	       const gfc_array_l1 *mask, const gfc_array_i1 *vector)
{
  /* r.* indicates the return array.  */
  index_type rstride0;
  GFC_INTEGER_1 * restrict rptr;
  /* s.* indicates the source array.  */
  index_type sstride[GFC_MAX_DIMENSIONS];
  index_type sstride0;
  const GFC_INTEGER_1 *sptr;
  /* m.* indicates the mask array.  */
  index_type mstride[GFC_MAX_DIMENSIONS];
  index_type mstride0;
  const GFC_LOGICAL_1 *mptr;

  index_type count[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  int zero_sized;
  index_type n;
  index_type dim;
  index_type nelem;
  index_type total;
  int mask_kind;

  dim = GFC_DESCRIPTOR_RANK (array);

  mptr = mask->base_addr;

  /* Use the same loop for all logical types, by using GFC_LOGICAL_1
     and using shifting to address size and endian issues.  */

  mask_kind = GFC_DESCRIPTOR_SIZE (mask);

  if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
#ifdef HAVE_GFC_LOGICAL_16
      || mask_kind == 16
#endif
      )
    {
      /*  Do not convert a NULL pointer as we use test for NULL below.  */
      if (mptr)
	mptr = GFOR_POINTER_TO_L1 (mptr, mask_kind);
    }
  else
    runtime_error ("Funny sized logical array");

  zero_sized = 0;
  for (n = 0; n < dim; n++)
    {
      count[n] = 0;
      extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
      if (extent[n] <= 0)
       zero_sized = 1;
      sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n);
      mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n);
    }
  if (sstride[0] == 0)
    sstride[0] = 1;
  if (mstride[0] == 0)
    mstride[0] = mask_kind;

  if (zero_sized)
    sptr = NULL;
  else
    sptr = array->base_addr;

  if (ret->base_addr == NULL || unlikely (compile_options.bounds_check))
    {
      /* Count the elements, either for allocating memory or
	 for bounds checking.  */

      if (vector != NULL)
	{
	  /* The return array will have as many
	     elements as there are in VECTOR.  */
	  total = GFC_DESCRIPTOR_EXTENT(vector,0);
	  if (total < 0)
	    {
	      total = 0;
	      vector = NULL;
	    }
	}
      else
        {
      	  /* We have to count the true elements in MASK.  */
	  total = count_0 (mask);
        }

      if (ret->base_addr == NULL)
	{
	  /* Setup the array descriptor.  */
	  GFC_DIMENSION_SET(ret->dim[0], 0, total-1, 1);

	  ret->offset = 0;

	  /* xmalloc allocates a single byte for zero size.  */
	  ret->base_addr = xmalloc (sizeof (GFC_INTEGER_1) * total);

	  if (total == 0)
//.........這裏部分代碼省略.........

void
unpack0_c16 (gfc_array_c16 *ret, const gfc_array_c16 *vector,
		 const gfc_array_l1 *mask, const GFC_COMPLEX_16 *fptr)
{
  /* r.* indicates the return array.  */
  index_type rstride[GFC_MAX_DIMENSIONS];
  index_type rstride0;
  index_type rs;
  GFC_COMPLEX_16 * restrict rptr;
  /* v.* indicates the vector array.  */
  index_type vstride0;
  GFC_COMPLEX_16 *vptr;
  /* Value for field, this is constant.  */
  const GFC_COMPLEX_16 fval = *fptr;
  /* m.* indicates the mask array.  */
  index_type mstride[GFC_MAX_DIMENSIONS];
  index_type mstride0;
  const GFC_LOGICAL_1 *mptr;

  index_type count[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  index_type n;
  index_type dim;

  int empty;
  int mask_kind;

  empty = 0;

  mptr = mask->data;

  /* Use the same loop for all logical types, by using GFC_LOGICAL_1
     and using shifting to address size and endian issues.  */

  mask_kind = GFC_DESCRIPTOR_SIZE (mask);

  if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
#ifdef HAVE_GFC_LOGICAL_16
      || mask_kind == 16
#endif
      )
    {
      /*  Do not convert a NULL pointer as we use test for NULL below.  */
      if (mptr)
	mptr = GFOR_POINTER_TO_L1 (mptr, mask_kind);
    }
  else
    runtime_error ("Funny sized logical array");

  if (ret->data == NULL)
    {
      /* The front end has signalled that we need to populate the
	 return array descriptor.  */
      dim = GFC_DESCRIPTOR_RANK (mask);
      rs = 1;
      for (n = 0; n < dim; n++)
	{
	  count[n] = 0;
	  ret->dim[n].stride = rs;
	  ret->dim[n].lbound = 0;
	  ret->dim[n].ubound = mask->dim[n].ubound - mask->dim[n].lbound;
	  extent[n] = ret->dim[n].ubound + 1;
	  empty = empty || extent[n] <= 0;
	  rstride[n] = ret->dim[n].stride;
	  mstride[n] = mask->dim[n].stride * mask_kind;
	  rs *= extent[n];
	}
      ret->offset = 0;
      ret->data = internal_malloc_size (rs * sizeof (GFC_COMPLEX_16));
    }
  else
    {
      dim = GFC_DESCRIPTOR_RANK (ret);
      for (n = 0; n < dim; n++)
	{
	  count[n] = 0;
	  extent[n] = ret->dim[n].ubound + 1 - ret->dim[n].lbound;
	  empty = empty || extent[n] <= 0;
	  rstride[n] = ret->dim[n].stride;
	  mstride[n] = mask->dim[n].stride * mask_kind;
	}
      if (rstride[0] == 0)
	rstride[0] = 1;
    }

  if (empty)
    return;

  if (mstride[0] == 0)
    mstride[0] = 1;

  vstride0 = vector->dim[0].stride;
  if (vstride0 == 0)
    vstride0 = 1;
  rstride0 = rstride[0];
  mstride0 = mstride[0];
  rptr = ret->data;
  vptr = vector->data;

  while (rptr)
//.........這裏部分代碼省略.........

void
pack_r16 (gfc_array_r16 *ret, const gfc_array_r16 *array,
	       const gfc_array_l1 *mask, const gfc_array_r16 *vector)
{
  /* r.* indicates the return array.  */
  index_type rstride0;
  GFC_REAL_16 * restrict rptr;
  /* s.* indicates the source array.  */
  index_type sstride[GFC_MAX_DIMENSIONS];
  index_type sstride0;
  const GFC_REAL_16 *sptr;
  /* m.* indicates the mask array.  */
  index_type mstride[GFC_MAX_DIMENSIONS];
  index_type mstride0;
  const GFC_LOGICAL_1 *mptr;

  index_type count[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  int zero_sized;
  index_type n;
  index_type dim;
  index_type nelem;
  index_type total;
  int mask_kind;

  dim = GFC_DESCRIPTOR_RANK (array);

  mptr = mask->data;

  /* Use the same loop for all logical types, by using GFC_LOGICAL_1
     and using shifting to address size and endian issues.  */

  mask_kind = GFC_DESCRIPTOR_SIZE (mask);

  if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
#ifdef HAVE_GFC_LOGICAL_16
      || mask_kind == 16
#endif
      )
    {
      /*  Do not convert a NULL pointer as we use test for NULL below.  */
      if (mptr)
	mptr = GFOR_POINTER_TO_L1 (mptr, mask_kind);
    }
  else
    runtime_error ("Funny sized logical array");

  zero_sized = 0;
  for (n = 0; n < dim; n++)
    {
      count[n] = 0;
      extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
      if (extent[n] <= 0)
       zero_sized = 1;
      sstride[n] = array->dim[n].stride;
      mstride[n] = mask->dim[n].stride * mask_kind;
    }
  if (sstride[0] == 0)
    sstride[0] = 1;
  if (mstride[0] == 0)
    mstride[0] = mask_kind;

  if (zero_sized)
    sptr = NULL;
  else
    sptr = array->data;

  if (ret->data == NULL || compile_options.bounds_check)
    {
      /* Count the elements, either for allocating memory or
	 for bounds checking.  */

      if (vector != NULL)
	{
	  /* The return array will have as many
	     elements as there are in VECTOR.  */
	  total = vector->dim[0].ubound + 1 - vector->dim[0].lbound;
	  if (total < 0)
	    {
	      total = 0;
	      vector = NULL;
	    }
	}
      else
	{
	  /* We have to count the true elements in MASK.  */

	  /* TODO: We could speed up pack easily in the case of only
	     few .TRUE. entries in MASK, by keeping track of where we
	     would be in the source array during the initial traversal
	     of MASK, and caching the pointers to those elements. Then,
	     supposed the number of elements is small enough, we would
	     only have to traverse the list, and copy those elements
	     into the result array. In the case of datatypes which fit
	     in one of the integer types we could also cache the
	     value instead of a pointer to it.
	     This approach might be bad from the point of view of
	     cache behavior in the case where our cache is not big
	     enough to hold all elements that have to be copied.  */

//.........這裏部分代碼省略.........