New submission from Christian Heimes:
The operator module doesn't have a Python implementation of _compare_digest.
This code mimicks the C code:
def _compare_digest(a, b):
if isinstance(a, str) and isinstance(b, str):
a = a.encode("ascii")
b = b.encode("ascii")
a = memoryview(a)
len_a = len(a)
right = memoryview(b)
len_b = len(right)
if len_a == len_b:
result = 0
left = a
# loop count depends on length of b
if len_a != len_b:
result = 1
left = b
for l, r in zip(left, right):
result |= l ^ r
return result == 0
----------
messages: 199868
nosy: christian.heimes, pitrou, serhiy.storchaka
priority: normal
severity: normal
stage: needs patch
status: open
title: Provide Python implementation of operator.compare_digest()
type: enhancement
versions: Python 3.4
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue19259>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
