22 lines
403 B
Python
22 lines
403 B
Python
import re
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re_hex = r'^[0-9a-fA-Z]+$'
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def is_hex(hx):
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m = re.match(re_hex, hx)
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if m == None:
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raise ValueError('not valid hex {}'.format(hx))
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return hx
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def strip_0x(hx):
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if len(hx) >= 2 and hx[:2] == '0x':
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hx = hx[2:]
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return is_hex(hx)
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def hex_to_int(hx, endianness='big'):
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hx = strip_0x(hx)
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b = bytes.fromhex(hx)
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return int.from_bytes(b, endianness)
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