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comparison configmix/config.py @ 483:38e4be1882e3

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Optimize .quote() by using str.translate() instead of repeatedly calling str.replace()
author Franz Glasner <f.glasner@feldmann-mg.com>
date Fri, 17 Dec 2021 14:14:36 +0100
parents 8b8ffb74d452
children 0259bd521729
comparison
equal deleted inserted replaced
482:8b8ffb74d452 483:38e4be1882e3
235 _QUOTE = u(b'%') 235 _QUOTE = u(b'%')
236 _QUOTE_x = u(b'x') 236 _QUOTE_x = u(b'x')
237 _QUOTE_u = u(b'u') 237 _QUOTE_u = u(b'u')
238 _QUOTE_U = u(b'U') 238 _QUOTE_U = u(b'U')
239 _COMMENT = u(b'#') 239 _COMMENT = u(b'#')
240 _QUOTE_MAP = {
241 0x25: u(b'%x25'), # _QUOTE
242 0x2e: u(b'%x2e'), # _DOT
243 0x3a: u(b'%x3a'), # _NS_SEPARATOR
244 0x23: u(b'%x23'), # _COMMENT / anchor
245 0x7c: u(b'%x7c'), # _FILTER_SEPARATOR
246 0x22: u(b'%x22'),
247 0x27: u(b'%x27'),
248 0x7b: u(b'%x7b'),
249 0x7d: u(b'%x7d'),
250 0x5b: u(b'%x5b'),
251 0x5d: u(b'%x5d'),
252 }
240 _QUOTE_SAFE = u(b'abcdefghijklmnopqrstuvwxyz' 253 _QUOTE_SAFE = u(b'abcdefghijklmnopqrstuvwxyz'
241 b'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 254 b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
242 b'0123456789' 255 b'0123456789'
243 b'-_@!§$&/()=?*+~;,<>´`^') 256 b'-_@!$&/\\()=?*+~;,<>^')
244 """Mostly used configuration key characters that do not need any quoting 257 """Mostly used configuration key characters that do not need any quoting
245 258
246 """ 259 """
247 260
248 is_jail = False 261 is_jail = False
705 ``#``; ``'``, ``"``, ``|``, ``{``, ``}``, ``[`` and ``]``. 718 ``#``; ``'``, ``"``, ``|``, ``{``, ``}``, ``[`` and ``]``.
706 719
707 See also the :ref:`quoting` section. 720 See also the :ref:`quoting` section.
708 721
709 """ 722 """
710 # Quick check whether all of the chars is in _QUOTE_SAFE 723 # Quick check whether all of the chars are in _QUOTE_SAFE
711 if not s.rstrip(klass._QUOTE_SAFE): 724 if not s.rstrip(klass._QUOTE_SAFE):
712 return s 725 return s
726
713 # Slow path 727 # Slow path
714 qc = klass._QUOTE 728 re_encode = False
715 s = s.replace(qc, qc + "x25") 729 if PY2:
716 s = s.replace(klass._DOT, qc + "x2e") 730 # Use the Unicode translation variant in PY2
717 s = s.replace(klass._NS_SEPARATOR, qc + "x3a") 731 if isinstance(s, str):
718 s = s.replace(klass._COMMENT, qc + "x23") 732 s = s.decode("latin1")
719 s = s.replace(klass._FILTER_SEPARATOR, qc + "x7c") 733 re_encode = True
720 s = s.replace('"', qc + "x22") 734 s = s.translate(klass._QUOTE_MAP)
721 s = s.replace("'", qc + "x27") 735 if re_encode:
722 s = s.replace('{', qc + "x7b") 736 return s.encode("latin1")
723 s = s.replace('}', qc + "x7d") 737 else:
724 s = s.replace('[', qc + "x5b") 738 return s
725 return s.replace(']', qc + "x5d")
726 739
727 @classmethod 740 @classmethod
728 def unquote(klass, s): 741 def unquote(klass, s):
729 """Unquote the content of `s`: handle all patterns ``%xNN``, 742 """Unquote the content of `s`: handle all patterns ``%xNN``,
730 ``%uNNNN`` or ``%UNNNNNNNN``. 743 ``%uNNNN`` or ``%UNNNNNNNN``.