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# part of https://fedorapeople.org/cgit/jpokorny/public_git/snippets.git
# (c) Jan Pokorny, license determined per COPYING file in the repository's root
# we only consider absolute value (for tha case of "-0x..." hexstr parameter)
# presumably damn slow, but should work for magic strings with uknown length
hexstring2bytes = \
lambda hexstr: \
reduce(
lambda acc, (i, x):
acc[:-1] + chr(int(x + hex(ord(acc[-1]))[-1], 16)) if i % 2
else acc + chr(int(x, 16)),
enumerate(reversed(hexstr.lstrip('-0x'))),
''
)
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