/* Grow/shrink the virtual array VA to N elements. Zero any new elements
allocated. */
varray_type
varray_grow (varray_type va, size_t n)
{
size_t old_elements = va->num_elements;
if (n != old_elements)
{
size_t elem_size = element[va->type].size;
size_t old_data_size = old_elements * elem_size;
size_t data_size = n * elem_size;
#ifdef GATHER_STATISTICS
struct varray_descriptor *desc = varray_descriptor (va->name);
varray_type oldva = va;
if (data_size > old_data_size)
desc->allocated += data_size - old_data_size;
desc->resized ++;
#endif
if (element[va->type].uses_ggc)
va = ggc_realloc (va, VARRAY_HDR_SIZE + data_size);
else
va = xrealloc (va, VARRAY_HDR_SIZE + data_size);
va->num_elements = n;
if (n > old_elements)
memset (&va->data.vdt_c[old_data_size], 0, data_size - old_data_size);
#ifdef GATHER_STATISTICS
if (oldva != va)
desc->copied++;
#endif
}
return va;
}
/* Allocate a virtual array with NUM_ELEMENT elements, each of which is
ELEMENT_SIZE bytes long, named NAME. Array elements are zeroed. */
varray_type
varray_init (size_t num_elements, enum varray_data_enum element_kind,
const char *name)
{
size_t data_size = num_elements * element[element_kind].size;
varray_type ptr;
#ifdef GATHER_STATISTICS
struct varray_descriptor *desc = varray_descriptor (name);
desc->created++;
desc->allocated += data_size + VARRAY_HDR_SIZE;
#endif
if (element[element_kind].uses_ggc)
ptr = GGC_CNEWVAR (struct varray_head_tag, VARRAY_HDR_SIZE + data_size);
else
/* Allocate a virtual array with NUM_ELEMENT elements, each of which is
ELEMENT_SIZE bytes long, named NAME. Array elements are zeroed. */
varray_type
varray_init (size_t num_elements, enum varray_data_enum element_kind,
const char *name)
{
size_t data_size = num_elements * element[element_kind].size;
varray_type ptr;
#ifdef GATHER_STATISTICS
struct varray_descriptor *desc = varray_descriptor (name);
desc->created++;
desc->allocated += data_size + VARRAY_HDR_SIZE;
#endif
if (element[element_kind].uses_ggc)
ptr = ggc_alloc_cleared (VARRAY_HDR_SIZE + data_size);
else
ptr = xcalloc (VARRAY_HDR_SIZE + data_size, 1);
ptr->num_elements = num_elements;
ptr->elements_used = 0;
ptr->type = element_kind;
ptr->name = name;
return ptr;
}
