| 11 | |
| 12 | # Disk Abstraction Layer |
| 13 | def __init__(self, blocks, size): |
| 14 | assert type(blocks) is int and 1 <= blocks <= self.MAX_BLOCKS |
| 15 | assert type(size) is int and 1 <= size <= self.MAX_SIZE |
| 16 | blocks = int(ceil(float(blocks * (size + 1)) / size)) |
| 17 | assert blocks <= self.MAX_SIZE |
| 18 | DAL1.BLOCKS = blocks |
| 19 | DAL1.SIZE = size |
| 20 | self.__disk = DAL1() |
| 21 | self.__blocks = (blocks * size) / (size + 1) |
| 22 | self.__index = (blocks - self.__blocks) * size |
| 23 | self.__BIT = [0 for index in range(self.__blocks)] |
| 24 | |
| 25 | # Open A Block |
| 26 | def open(self, status): |