2 # -*- encoding: utf-8; py-indent-offset: 4 -*-
3 # +------------------------------------------------------------------+
4 # | ____ _ _ __ __ _ __ |
5 # | / ___| |__ ___ ___| | __ | \/ | |/ / |
6 # | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / |
7 # | | |___| | | | __/ (__| < | | | | . \ |
8 # | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ |
10 # | Copyright Mathias Kettner 2016 mk@mathias-kettner.de |
11 # +------------------------------------------------------------------+
13 # This file is part of Check_MK.
14 # The official homepage is at http://mathias-kettner.de/check_mk.
16 # check_mk is free software; you can redistribute it and/or modify it
17 # under the terms of the GNU General Public License as published by
18 # the Free Software Foundation in version 2. check_mk is distributed
19 # in the hope that it will be useful, but WITHOUT ANY WARRANTY; with-
20 # out even the implied warranty of MERCHANTABILITY or FITNESS FOR A
21 # PARTICULAR PURPOSE. See the GNU General Public License for more de-
22 # tails. You should have received a copy of the GNU General Public
23 # License along with GNU Make; see the file COPYING. If not, write
24 # to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
25 # Boston, MA 02110-1301 USA.
26 """This module wraps some regex handling functions used by Check_MK"""
29 from typing
import Dict
, Pattern
# pylint:disable=unused-import
31 from cmk
.utils
.exceptions
import MKGeneralException
32 from cmk
.utils
.i18n
import _
34 g_compiled_regexes
= {} # type: Dict[str, Pattern]
38 """Compile regex or look it up in already compiled regexes.
39 (compiling is a CPU consuming process. We cache compiled regexes)."""
41 return g_compiled_regexes
[pattern
]
46 reg
= re
.compile(pattern
)
47 except Exception as e
:
48 raise MKGeneralException(_("Invalid regular expression '%s': %s") % (pattern
, e
))
50 g_compiled_regexes
[pattern
] = reg
54 # Checks if a string contains characters that make it neccessary
55 # to use regular expression logic to handle it correctly
56 def is_regex(pattern
):
58 if c
in '.?*+^$|[](){}\\':
63 def escape_regex_chars(match
):
66 if c
in r
"[]\().?{}|*^$+":