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add regexes to idlib to match certain kinds of base32-encoded values

This commit is contained in:
Zooko O'Whielacronx 2008-01-03 16:44:46 -07:00
parent c066903566
commit 46db7cf1dc
1 changed files with 11 additions and 0 deletions
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11
src/allmydata/util/idlib.py
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@ -34,6 +34,17 @@ def get_trailing_chars_without_lsbs(N):
d = {}
return ''.join(_get_trailing_chars_without_lsbs(N, d=d))
ZBASE32CHAR = '['+get_trailing_chars_without_lsbs(0)+']'
ZBASE32CHAR_4bits = '['+get_trailing_chars_without_lsbs(1)+']'
ZBASE32CHAR_3bits = '['+get_trailing_chars_without_lsbs(2)+']'
ZBASE32CHAR_2bits = '['+get_trailing_chars_without_lsbs(3)+']'
ZBASE32CHAR_1bits = '['+get_trailing_chars_without_lsbs(4)+']'
ZBASE32STR_1byte = ZBASE32CHAR+ZBASE32CHAR_3bits
ZBASE32STR_2bytes = ZBASE32CHAR+'{3}'+ZBASE32CHAR_1bits
ZBASE32STR_3bytes = ZBASE32CHAR+'{4}'+ZBASE32CHAR_4bits
ZBASE32STR_4bytes = ZBASE32CHAR+'{6}'+ZBASE32CHAR_2bits
ZBASE32STR_anybytes = '((?:%s{8})*' % (ZBASE32CHAR,) + "(?:|%s|%s|%s|%s))" % (ZBASE32STR_1byte, ZBASE32STR_2bytes, ZBASE32STR_3bytes, ZBASE32STR_4bytes)
def b2a(os):
"""
@param os the data to be encoded (a string)