25 lines
579 B
Python
25 lines
579 B
Python
# Copyright (C) 2019-2021 Hesham T. Banafa
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#From: https://stackoverflow.com/questions/39964383/implementation-of-i2osp-and-os2ip
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def i2osp(x, xLen):
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if x >= 256**xLen:
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raise ValueError("integer too large")
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digits = []
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while x:
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digits.append(int(x % 256))
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x //= 256
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for i in range(xLen - len(digits)):
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digits.append(0)
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return digits[::-1]
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def os2ip(X):
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xLen = len(X)
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X = X[::-1]
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x = 0
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for i in range(xLen):
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x += X[i] * 256**i
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return x
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