from time import time

from hashtree import HashTree

def timeF(f):

	start=time()

	f()

	end=time()

	print((end-start),"s")

def fullRead():

	block=True

	with open("/home/laman/ext2.img",mode="rb") as f:

		while block:

			block=f.read(HashTree.BLOCK_SIZE)

def selectedRead():

	with open("/home/laman/blocks.txt") as f:

		blocks=[int(x) for x in f]

	with open("/home/laman/ext2.img",mode="rb") as f:

		i1=-1

		for i2 in blocks:

			if i1+1!=i2:

				f.seek(i2*HashTree.BLOCK_SIZE)

			block=f.read(HashTree.BLOCK_SIZE)

			i1=i2

def lessSelectedRead():

	with open("/home/laman/blocks.txt") as f:

		blocks=[int(x) for x in f]

	with open("/home/laman/ext2.img",mode="rb") as f:

		i1=-1

		for i2 in blocks:

			if i2<=i1+8:

				block=f.read(HashTree.BLOCK_SIZE*(i2-i1))

			else:

				f.seek(i2*HashTree.BLOCK_SIZE)

				block=f.read(HashTree.BLOCK_SIZE)

			i1=i2

def shortSockets():

	pass

def longSockets():

	pass

# timeF(fullRead) # 85.40341448783875 s

# timeF(selectedRead) # 6.774365186691284 s

# timeF(lessSelectedRead) # 5.930811405181885 s