static SQLLEN enlargeKeyCache()

in qresult.c [856:907]

• 51 lines of code
• 16 McCabe index (conditional complexity)

static SQLLEN enlargeKeyCache(QResultClass *self, SQLLEN add_size, const char *message)
{
	size_t	alloc, alloc_req;
	Int4	num_fields = self->num_fields;
	BOOL	curs = (NULL != QR_get_cursor(self));

	if (add_size <= 0)
		return self->count_keyset_allocated;
	alloc = self->count_backend_allocated;
	if (num_fields > 0 && ((alloc_req = (Int4)self->num_cached_rows + add_size) > alloc || !self->backend_tuples))
	{
		if (1 > alloc)
		{
			if (curs)
				alloc = alloc_req;
			else
				alloc = (alloc_req > TUPLE_MALLOC_INC ? alloc_req : TUPLE_MALLOC_INC);
		}
		else
		{
			do
			{
				alloc *= 2;
			} while (alloc < alloc_req);
		}
		self->count_backend_allocated = 0;
		QR_REALLOC_return_with_error(self->backend_tuples, TupleField, num_fields * sizeof(TupleField) * alloc, self, message, -1);
		self->count_backend_allocated = alloc;
	}
	alloc = self->count_keyset_allocated;
	if (QR_haskeyset(self) && ((alloc_req = (Int4)self->num_cached_keys + add_size) > alloc || !self->keyset))
	{
		if (1 > alloc)
		{
			if (curs)
				alloc = alloc_req;
			else
				alloc = (alloc_req > TUPLE_MALLOC_INC ? alloc_req : TUPLE_MALLOC_INC);
		}
		else
		{
			do
			{
				alloc *= 2;
			} while (alloc < alloc_req);
		}
		self->count_keyset_allocated = 0;
		QR_REALLOC_return_with_error(self->keyset, KeySet, sizeof(KeySet) * alloc, self, message, -1);
		self->count_keyset_allocated = alloc;
	}
	return alloc;
}