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- import ipaddress
- from random import randint
- from random import shuffle
- import time
- #############################################################
- class BinaryTrie():
- def __init__(self):
- self.MASK = (1 << 31) - 1
- self.nodes = [0 for _ in range(64)]
- self.empty_nodes = [63 - i for i in range(63)]
- def __sizeof__(self):
- return self.nodes.__sizeof__() + self.empty_nodes.__sizeof__()
- def _get_left(self, value):
- return (value >> 1) & self.MASK
- def _get_right(self, value):
- return value >> (31 + 1)
- def _get_type(self, value):
- return value & 1
- def _create_node(self):
- if len(self.empty_nodes) == 0:
- self.empty_nodes = [31 + len(self.nodes) - i for i in range(32)]
- self.nodes += [0 for _ in range(32)]
- index = self.empty_nodes.pop()
- return index
- def _remove_nodes(self, node):
- if node == 0:
- return
- self.empty_nodes.append(node)
- left_node = self._get_left(self.nodes[node])
- self._remove_nodes(left_node)
- right_node = self._get_right(self.nodes[node])
- self._remove_nodes(right_node)
- self.nodes[node] = 0
- def add(self, address):
- value, size = self.change_format(address)
- current_node = 0
- for i in range(size):
- bit = 31 - i
- if self._get_type(self.nodes[current_node]) == 1: # leaf
- return
- if (value >> bit) & 1 == 0:
- current_left = self._get_left(self.nodes[current_node])
- if current_left == 0:
- current_left = self._create_node()
- self.nodes[current_node] |= current_left << 1
- current_node = current_left
- else:
- current_right = self._get_right(self.nodes[current_node])
- if current_right == 0:
- current_right = self._create_node()
- self.nodes[current_node] |= current_right << (31 + 1)
- current_node = current_right
- current_left = self._get_left(self.nodes[current_node]) # delete children if a vertex added
- current_right = self._get_right(self.nodes[current_node])
- self._remove_nodes(current_left)
- self._remove_nodes(current_right)
- self.nodes[current_node] = 1 # leaf
- def __contains__(self, address):
- value, size = self.change_format(address)
- current_node = 0
- for i in range(size):
- bit = 31 - i
- if self._get_type(self.nodes[current_node]) == 1:
- return True
- if (value >> bit) & 1 == 0:
- current_left = self._get_left(self.nodes[current_node])
- if current_left == 0:
- return False
- current_node = current_left
- else:
- current_right = self._get_right(self.nodes[current_node])
- if current_right == 0:
- return False
- current_node = current_right
- return self._get_type(self.nodes[current_node]) == 1
- def change_format(self, address):
- if '/' in address:
- address, routing_prefix = address.split('/')
- size = 32 - int(routing_prefix)
- else:
- size = 0
- address = list(map(int, address.split('.')))
- value = 0
- for item in address:
- value <<= 8
- value ^= item
- value >>= size
- value <<= size
- return value, 32 - size
- ##############################################################
- def add_set(subnet):
- try:
- addresses_set.add(ipaddress.ip_network(subnet))
- except Exception:
- subnet = ipaddress.ip_interface(subnet)
- addresses_set.add(subnet.network)
- def contains_set(address):
- address = ipaddress.ip_address(address)
- for subnet in addresses_set:
- if address in subnet:
- return True
- return False
- def add_list(subnet):
- try:
- addresses_list.append(ipaddress.ip_network(subnet))
- except Exception:
- subnet = ipaddress.ip_interface(subnet)
- addresses_list.append(subnet.network)
- def contains_list(address):
- address = ipaddress.ip_address(address)
- for subnet in addresses_list:
- if address in subnet:
- return True
- return False
- #### TEST PART ####
- def get_rand_address(N):
- mask = [str(randint(1, 255)) + '.' + str(randint(1, 255)) + '.' + str(randint(1, 255)) + '.' + str(randint(1, 255))
- for i in range(N)]
- submask = [mask[i] + '/' + str(randint(8, 32)) for i in range(N) for _ in range(8)]
- return submask
- def test_add(N):
- addresses = get_rand_address(N)
- times = [[] for _ in range(3)]
- memories = [[] for _ in range(3)]
- for i in range(0, N, 100):
- current_addresses = [addresses[i + j] for j in range(100)]
- start = time.time()
- for address in current_addresses:
- add_set(address)
- time_set = time.time() - start
- times[0].append(time_set + (times[0][-1] if len(times[0]) else 0))
- memories[0].append(addresses_set.__sizeof__())
- start = time.time()
- for address in current_addresses:
- add_list(address)
- time_list = time.time() - start
- times[1].append(time_list + (times[1][-1] if len(times[1]) else 0))
- memories[1].append(addresses_list.__sizeof__())
- start = time.time()
- for address in current_addresses:
- binaryTrie.add(address)
- time_SUPERTREE = time.time() - start
- times[2].append(time_SUPERTREE + (times[2][-1] if len(times[2]) else 0))
- memories[2].append(binaryTrie.__sizeof__())
- return [times, memories]
- check1 = []
- check2 = []
- check3 = []
- def test_contains(N):
- addresses = get_rand_address(N)
- for i in range(len(addresses)):
- if '/' in addresses[i]:
- pref, suf = addresses[i].split('/')
- addresses[i] = pref
- times = [[] for _ in range(3)]
- for i in range(0, N, 100):
- current_addresses = [addresses[i + j] for j in range(100)]
- start = time.time()
- for address in current_addresses:
- check1.append(contains_set(address))
- time_set = time.time() - start
- times[0].append(time_set + (times[0][-1] if len(times[0]) else 0))
- start = time.time()
- for address in current_addresses:
- check2.append(contains_list(address))
- time_list = time.time() - start
- start = time.time()
- times[1].append(time_list + (times[1][-1] if len(times[1]) else 0))
- for address in current_addresses:
- check3.append(binaryTrie.__contains__(address))
- time_SUPERTREE = time.time() - start
- times[2].append(time_SUPERTREE + (times[2][-1] if len(times[2]) else 0))
- return times
- addresses_set = set()
- addresses_list = []
- binaryTrie = BinaryTrie()
- import matplotlib.pyplot as plt
- N = 100000
- print(N)
- times_add, memories = test_add(N)
- print('test_add done')
- ox = [i for i in range(0, N, 100)]
- fig, axes = plt.subplots(nrows=1, ncols=1)
- axes.plot(ox, times_add[0], color='#00dd00', label="Set")
- axes.plot(ox, times_add[1], color='#dd0000', label="List")
- axes.plot(ox, times_add[2], color='#0000dd', label="Trie")
- axes.legend(loc="upper left")
- axes.set_xlabel("Количество подсетей")
- axes.set_ylabel("Время работы add")
- fig.set_size_inches(10, 7)
- plt.show()
- fig, axes = plt.subplots(nrows=1, ncols=1)
- axes.plot(ox, memories[0], color='#00dd00', label="Set")
- axes.plot(ox, memories[1], color='#dd0000', label="List")
- axes.plot(ox, memories[2], color='#0000dd', label="Trie")
- axes.legend(loc="upper left")
- axes.set_xlabel("Количество подсетей")
- axes.set_ylabel('Memory')
- fig.set_size_inches(10, 7)
- plt.show()
- N = 1000
- ox = [i for i in range(0, N, 100)]
- times_contains = test_contains(N)
- print('test contains done')
- fig, axes = plt.subplots(nrows=1, ncols=1)
- axes.plot(ox, times_contains[0], color='#00dd00', label="Set")
- axes.plot(ox, times_contains[1], color='#dd0000', label="List")
- axes.plot(ox, times_contains[2], color='#0000dd', label="Trie")
- axes.legend(loc="upper left")
- axes.set_xlabel("Количество подсетей")
- axes.set_ylabel("Время работы contains")
- fig.set_size_inches(10, 7)
- plt.show()
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