Function array_pred_insert

lib_fiber/c/src/common/array.c:202–231

}

int array_pred_insert(ARRAY *a, int position, void *obj)
{
	int	idx;

	/*
	 * a->items[count - 1] should be the last valid item node
	 * position should: positioin >= 0 && position <= a->count - 1
	 */
	if(position < 0 || position >= a->count) {
		return -1;
	}

	if(a->count >= a->capacity) {
		array_grow(a, a->count + 1);
	}

	/* NOTICE: the C's index begin with 0
	 * when position == 0, just prepend one new node before the first node
	 * of the array
	 */
	for(idx = a->count; idx > position && idx > 0; idx--) {
		/* if idx == 0 then we has arrived
		 * at the beginning of the array
		 */
		a->items[idx] = a->items[idx - 1];
	}
	a->items[position] = obj;
	a->count++;
	return position;
}

int array_succ_insert(ARRAY *a, int position, void *obj)
{