Javaはハーフソートアルゴリズムを実装します

public static void halfSort(int[] array) {
    int low, high, mid;
    int tmp, j;
    for (int i = 1; i < array.length; i++) {
      tmp = array[i];
      low = 0;
      high = i - 1;
      while (low <= high) {
        mid = low + (high - low) / 2;
        if (array[mid] > tmp)
          high = mid - 1;
        else
          low = mid + 1;
      }
      for (j = i - 1; j > high; j--) {
        array[j + 1] = array[j];
      }
      array[high + 1] = tmp;
    }
  }