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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2025-04-10 17:07
__init__.py	864 B	-rw-r--r--	2016-12-04 19:41
escape.py	1.45 KB	-rw-r--r--	2016-12-04 19:41
platform_.py	2.18 KB	-rw-r--r--	2016-12-04 19:41
properties.py	1.31 KB	-rw-r--r--	2016-12-04 19:41

Rename

"""
escape/unescape routines available for backends which need
alphanumeric usernames, services, or other values
"""

import re
import string
import sys

# True if we are running on Python 3.
# taken from six.py
PY3 = sys.version_info[0] == 3

# allow use of unicode literals
if PY3:
    def u(s):
        return s
    def _unichr(c):
        return chr(c)
else:
    def u(s):
        return s.decode('utf-8')
    def _unichr(c):
        return unichr(c)

LEGAL_CHARS = (
    getattr(string, 'letters', None)  # Python 2
    or getattr(string, 'ascii_letters')  # Python 3
) + string.digits

ESCAPE_FMT = "_%02X"

def _escape_char(c):
    "Single char escape. Return the char, escaped if not already legal"
    if isinstance(c, int):
        c = _unichr(c)
    return c if c in LEGAL_CHARS else ESCAPE_FMT % ord(c)

def escape(value):
    """
    Escapes given string so the result consists of alphanumeric chars and
    underscore only.
    """
    return "".join(_escape_char(c) for c in value.encode('utf-8'))

def _unescape_code(regex_match):
    ordinal = int(regex_match.group('code'), 16)
    if sys.version_info >= (3,):
        return bytes([ordinal])
    return chr(ordinal)

def unescape(value):
    """
    Inverse of escape.
    """
    re_esc = re.compile(
        # the pattern must be bytes to operate on bytes
        ESCAPE_FMT.replace('%02X', '(?P<code>[0-9A-F]{2})').encode('ascii')
    )
    return re_esc.sub(_unescape_code, value.encode('ascii')).decode('utf-8')