42 lines
1004 B
Python
42 lines
1004 B
Python
import binascii
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import os
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class Utils:
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@staticmethod
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def random_hex_string(length: int):
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buffer = os.urandom(int(length / 2))
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return Utils.bytes_to_hex(buffer)
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@staticmethod
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def truncate_middle(s: str, length: int) -> str:
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if length <= 1:
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raise TypeError()
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first = length / 2
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result = s[:first]
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result += "..."
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result += s[len(s) - (length - first):]
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return result
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@staticmethod
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def split(s: str, c: str):
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return s.split(c)
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@staticmethod
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def to_byte_array(i: int) -> bytes:
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width = i.bit_length()
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width += 8 - ((width % 8) or 8)
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fmt = '%%0%dx' % (width // 4)
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if i == 0:
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return bytes([0])
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return binascii.unhexlify(fmt % i)
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@staticmethod
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def bytes_to_hex(buffer: bytes) -> str:
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return binascii.hexlify(buffer).decode()
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@staticmethod
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def hex_to_bytes(s: str) -> bytes:
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return binascii.unhexlify(s)
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