C++ GFC_DESCRIPTOR_STRIDE_BYTES函數代碼示例

static void
spread_internal_scalar (gfc_array_char *ret, const char *source,
			const index_type *along, const index_type *pncopies)
{
  int n;
  int ncopies = *pncopies;
  char * dest;
  size_t size;

  size = GFC_DESCRIPTOR_SIZE(ret);

  if (GFC_DESCRIPTOR_RANK (ret) != 1)
    runtime_error ("incorrect destination rank in spread()");

  if (*along > 1)
    runtime_error ("dim outside of rank in spread()");

  if (ret->base_addr == NULL)
    {
      ret->base_addr = xmallocarray (ncopies, size);
      ret->offset = 0;
      GFC_DIMENSION_SET(ret->dim[0], 0, ncopies - 1, 1);
    }
  else
    {
      if (ncopies - 1 > (GFC_DESCRIPTOR_EXTENT(ret,0)  - 1)
			   / GFC_DESCRIPTOR_STRIDE(ret,0))
	runtime_error ("dim too large in spread()");
    }

  for (n = 0; n < ncopies; n++)
    {
      dest = (char*)(ret->base_addr + n * GFC_DESCRIPTOR_STRIDE_BYTES(ret,0));
      memcpy (dest , source, size);
    }
}

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.........

//.........這裏部分代碼省略.........

      if (GFC_UNALIGNED_C8(ret->base_addr)
	  || GFC_UNALIGNED_C8(array->base_addr))
	break;
      else
	{
	  cshift0_c8 ((gfc_array_c8 *) ret, (gfc_array_c8 *) array, shift,
		      which);
	  return;
	}
#endif

    default:
      break;
    }


  which = which - 1;
  sstride[0] = 0;
  rstride[0] = 0;

  extent[0] = 1;
  count[0] = 0;
  n = 0;
  /* Initialized for avoiding compiler warnings.  */
  roffset = size;
  soffset = size;
  len = 0;

  for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
    {
      if (dim == which)
        {
          roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
          if (roffset == 0)
            roffset = size;
          soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
          if (soffset == 0)
            soffset = size;
          len = GFC_DESCRIPTOR_EXTENT(array,dim);
        }
      else
        {
          count[n] = 0;
          extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
          rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
          sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
          n++;
        }
    }
  if (sstride[0] == 0)
    sstride[0] = size;
  if (rstride[0] == 0)
    rstride[0] = size;

  dim = GFC_DESCRIPTOR_RANK (array);
  rstride0 = rstride[0];
  sstride0 = sstride[0];
  rptr = ret->base_addr;
  sptr = array->base_addr;

  shift = len == 0 ? 0 : shift % (ptrdiff_t)len;
  if (shift < 0)
    shift += len;

  while (rptr)

static void
spread_internal (gfc_array_char *ret, const gfc_array_char *source,
		 const index_type *along, const index_type *pncopies)
{
  /* r.* indicates the return array.  */
  index_type rstride[GFC_MAX_DIMENSIONS];
  index_type rstride0;
  index_type rdelta = 0;
  index_type rrank;
  index_type rs;
  char *rptr;
  char *dest;
  /* s.* indicates the source array.  */
  index_type sstride[GFC_MAX_DIMENSIONS];
  index_type sstride0;
  index_type srank;
  const char *sptr;

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

  size = GFC_DESCRIPTOR_SIZE(source);

  srank = GFC_DESCRIPTOR_RANK(source);

  rrank = srank + 1;
  if (rrank > GFC_MAX_DIMENSIONS)
    runtime_error ("return rank too large in spread()");

  if (*along > rrank)
      runtime_error ("dim outside of rank in spread()");

  ncopies = *pncopies;

  if (ret->base_addr == NULL)
    {
      /* The front end has signalled that we need to populate the
	 return array descriptor.  */

      size_t ub, stride;

      ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rrank;
      dim = 0;
      rs = 1;
      for (n = 0; n < rrank; n++)
	{
	  stride = rs;
	  if (n == *along - 1)
	    {
	      ub = ncopies - 1;
	      rdelta = rs * size;
	      rs *= ncopies;
	    }
	  else
	    {
	      count[dim] = 0;
	      extent[dim] = GFC_DESCRIPTOR_EXTENT(source,dim);
	      sstride[dim] = GFC_DESCRIPTOR_STRIDE_BYTES(source,dim);
	      rstride[dim] = rs * size;

	      ub = extent[dim]-1;
	      rs *= extent[dim];
	      dim++;
	    }

	  GFC_DIMENSION_SET(ret->dim[n], 0, ub, stride);
	}
      ret->offset = 0;
      ret->base_addr = xmallocarray (rs, size);

      if (rs <= 0)
	return;
    }
  else
    {
      int zero_sized;

      zero_sized = 0;

      dim = 0;
      if (GFC_DESCRIPTOR_RANK(ret) != rrank)
	runtime_error ("rank mismatch in spread()");

      if (compile_options.bounds_check)
	{
	  for (n = 0; n < rrank; n++)
	    {
	      index_type ret_extent;

	      ret_extent = GFC_DESCRIPTOR_EXTENT(ret,n);
	      if (n == *along - 1)
		{
		  rdelta = GFC_DESCRIPTOR_STRIDE_BYTES(ret,n);

		  if (ret_extent != ncopies)
		    runtime_error("Incorrect extent in return value of SPREAD"
//.........這裏部分代碼省略.........

static void
eoshift0 (gfc_array_char * ret, const gfc_array_char * array,
	  int shift, const char * pbound, int which, index_type size,
	  const char *filler, index_type filler_len)
{
  /* r.* indicates the return array.  */
  index_type rstride[GFC_MAX_DIMENSIONS];
  index_type rstride0;
  index_type roffset;
  char * restrict rptr;
  char *dest;
  /* s.* indicates the source array.  */
  index_type sstride[GFC_MAX_DIMENSIONS];
  index_type sstride0;
  index_type soffset;
  const char *sptr;
  const char *src;

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

  /* The compiler cannot figure out that these are set, initialize
     them to avoid warnings.  */
  len = 0;
  soffset = 0;
  roffset = 0;

  arraysize = size0 ((array_t *) array);

  if (ret->base_addr == NULL)
    {
      int i;

      ret->offset = 0;
      ret->dtype = array->dtype;
      for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
        {
	  index_type ub, str;

          ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;

          if (i == 0)
	    str = 1;
          else
            str = GFC_DESCRIPTOR_EXTENT(ret,i-1)
	      * GFC_DESCRIPTOR_STRIDE(ret,i-1);

	  GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);

        }

      /* xmalloc allocates a single byte for zero size.  */
      ret->base_addr = xmalloc (size * arraysize);
    }
  else if (unlikely (compile_options.bounds_check))
    {
      bounds_equal_extents ((array_t *) ret, (array_t *) array,
				 "return value", "EOSHIFT");
    }

  if (arraysize == 0)
    return;

  which = which - 1;

  extent[0] = 1;
  count[0] = 0;
  sstride[0] = -1;
  rstride[0] = -1;
  n = 0;
  for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
    {
      if (dim == which)
        {
          roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
          if (roffset == 0)
            roffset = size;
          soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
          if (soffset == 0)
            soffset = size;
          len = GFC_DESCRIPTOR_EXTENT(array,dim);
        }
      else
        {
          count[n] = 0;
          extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
          rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
          sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
          n++;
        }
    }
  if (sstride[0] == 0)
    sstride[0] = size;
  if (rstride[0] == 0)
    rstride[0] = size;

//.........這裏部分代碼省略.........

void
ISO_C_BINDING_PREFIX (c_f_pointer_u0) (void *c_ptr_in,
                                       gfc_array_void *f_ptr_out,
                                       const array_t *shape)
{
  int i = 0;
  int shapeSize = 0;

  GFC_DESCRIPTOR_DATA (f_ptr_out) = c_ptr_in;

  if (shape != NULL)
    {
      index_type source_stride, size;
      index_type str = 1;
      char *p;

      f_ptr_out->offset = str;
      shapeSize = 0;
      p = shape->base_addr;
      size = GFC_DESCRIPTOR_SIZE(shape);

      source_stride = GFC_DESCRIPTOR_STRIDE_BYTES(shape,0);

      /* shape's length (rank of the output array) */
      shapeSize = GFC_DESCRIPTOR_EXTENT(shape,0);
      for (i = 0; i < shapeSize; i++)
        {
	  index_type ub;

          /* Have to allow for the SHAPE array to be any valid kind for
             an INTEGER type.  */
	  switch (size)
	    {
#ifdef HAVE_GFC_INTEGER_1
	      case 1:
		ub = *((GFC_INTEGER_1 *) p);
		break;
#endif
#ifdef HAVE_GFC_INTEGER_2
	      case 2:
		ub = *((GFC_INTEGER_2 *) p);
		break;
#endif
#ifdef HAVE_GFC_INTEGER_4
	      case 4:
		ub = *((GFC_INTEGER_4 *) p);
		break;
#endif
#ifdef HAVE_GFC_INTEGER_8
	      case 8:
		ub = *((GFC_INTEGER_8 *) p);
		break;
#endif
#ifdef HAVE_GFC_INTEGER_16
	      case 16:
		ub = *((GFC_INTEGER_16 *) p);
		break;
#endif
	      default:
		internal_error (NULL, "c_f_pointer_u0: Invalid size");
	    }
	  p += source_stride;

	  if (i != 0)
	    {
	      str = str * GFC_DESCRIPTOR_EXTENT(f_ptr_out,i-1);
	      f_ptr_out->offset += str;
	    }

          /* Lower bound is 1, as specified by the draft.  */
	  GFC_DIMENSION_SET(f_ptr_out->dim[i], 1, ub, str);
        }

      f_ptr_out->offset *= -1;

      /* All we know is the rank, so set it, leaving the rest alone.
         Make NO assumptions about the state of dtype coming in!  If we
         shift right by TYPE_SHIFT bits we'll throw away the existing
         rank.  Then, shift left by the same number to shift in zeros
         and or with the new rank.  */
      f_ptr_out->dtype = ((f_ptr_out->dtype >> GFC_DTYPE_TYPE_SHIFT)
                           << GFC_DTYPE_TYPE_SHIFT) | shapeSize;
    }

void
unpack0_i16 (gfc_array_i16 *ret, const gfc_array_i16 *vector,
		 const gfc_array_l1 *mask, const GFC_INTEGER_16 *fptr)
{
  /* r.* indicates the return array.  */
  index_type rstride[GFC_MAX_DIMENSIONS];
  index_type rstride0;
  index_type rs;
  GFC_INTEGER_16 * restrict rptr;
  /* v.* indicates the vector array.  */
  index_type vstride0;
  GFC_INTEGER_16 *vptr;
  /* Value for field, this is constant.  */
  const GFC_INTEGER_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->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");

  if (ret->base_addr == 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;
	  GFC_DIMENSION_SET(ret->dim[n], 0,
			    GFC_DESCRIPTOR_EXTENT(mask,n) - 1, rs);
	  extent[n] = GFC_DESCRIPTOR_EXTENT(ret,n);
	  empty = empty || extent[n] <= 0;
	  rstride[n] = GFC_DESCRIPTOR_STRIDE(ret,n);
	  mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n);
	  rs *= extent[n];
	}
      ret->offset = 0;
      ret->base_addr = xmallocarray (rs, sizeof (GFC_INTEGER_16));
    }
  else
    {
      dim = GFC_DESCRIPTOR_RANK (ret);
      /* Initialize to avoid -Wmaybe-uninitialized complaints.  */
      rstride[0] = 1;
      for (n = 0; n < dim; n++)
	{
	  count[n] = 0;
	  extent[n] = GFC_DESCRIPTOR_EXTENT(ret,n);
	  empty = empty || extent[n] <= 0;
	  rstride[n] = GFC_DESCRIPTOR_STRIDE(ret,n);
	  mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n);
	}
      if (rstride[0] == 0)
	rstride[0] = 1;
    }

  if (empty)
    return;

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

  vstride0 = GFC_DESCRIPTOR_STRIDE(vector,0);
  if (vstride0 == 0)
    vstride0 = 1;
  rstride0 = rstride[0];
  mstride0 = mstride[0];
  rptr = ret->base_addr;
  vptr = vector->base_addr;

//.........這裏部分代碼省略.........

static void
pack_s_internal (gfc_array_char *ret, const gfc_array_char *array,
		 const GFC_LOGICAL_4 *mask, const gfc_array_char *vector,
		 index_type size)
{
  /* r.* indicates the return array.  */
  index_type rstride0;
  char *rptr;
  /* s.* indicates the source array.  */
  index_type sstride[GFC_MAX_DIMENSIONS];
  index_type sstride0;
  const char *sptr;

  index_type count[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  index_type n;
  index_type dim;
  index_type ssize;
  index_type nelem;
  index_type total;

  dim = GFC_DESCRIPTOR_RANK (array);
  /* Initialize sstride[0] to avoid -Wmaybe-uninitialized
     complaints.  */
  sstride[0] = size;
  ssize = 1;
  for (n = 0; n < dim; n++)
    {
      count[n] = 0;
      extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
      if (extent[n] < 0)
	extent[n] = 0;

      sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,n);
      ssize *= extent[n];
    }
  if (sstride[0] == 0)
    sstride[0] = size;

  sstride0 = sstride[0];

  if (ssize != 0)
    sptr = array->base_addr;
  else
    sptr = NULL;

  if (ret->base_addr == NULL)
    {
      /* Allocate the memory for the result.  */

      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
	{
	  if (*mask)
	    {
	      /* The result array will have as many elements as the input
		 array.  */
	      total = extent[0];
	      for (n = 1; n < dim; n++)
		total *= extent[n];
	    }
	  else
	    /* The result array will be empty.  */
	    total = 0;
	}

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

      ret->offset = 0;

      ret->base_addr = xmallocarray (total, size);

      if (total == 0)
	return;
    }

  rstride0 = GFC_DESCRIPTOR_STRIDE_BYTES(ret,0);
  if (rstride0 == 0)
    rstride0 = size;
  rptr = ret->base_addr;

  /* The remaining possibilities are now:
       If MASK is .TRUE., we have to copy the source array into the
     result array. We then have to fill it up with elements from VECTOR.
       If MASK is .FALSE., we have to copy VECTOR into the result
     array. If VECTOR were not present we would have already returned.  */

  if (*mask && ssize != 0)
    {
//.........這裏部分代碼省略.........