MySQL 8.0.30
Source Code Documentation
pattern_matcher.h
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1/*
2 Copyright (c) 2017, 2022, Oracle and/or its affiliates.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License, version 2.0,
6 as published by the Free Software Foundation.
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8 This program is also distributed with certain software (including
9 but not limited to OpenSSL) that is licensed under separate terms,
10 as designated in a particular file or component or in included license
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13 separately licensed software that they have included with MySQL.
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15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License, version 2.0, for more details.
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20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23*/
24
25#include <m_ctype.h>
26#include <string>
27#include <unordered_set>
28
29/**
30 Enables comparison of strings against particular set of patterns. Patterns
31 may contain wildcards (WILD_ONE/WILD_MANY/WILD_ESCAPE). Pattern strings may
32 be added to the class through a special method. Matching method traverses all
33 of the patterns within pattern matcher in search for a match.
34*/
36 public:
37 size_t add_patterns(const std::string &patterns, char delimiter = ':');
38 bool is_matching(const std::string &text, const CHARSET_INFO *info) const;
39 void clear();
40
41 private:
42 /** any (single) character wild card */
43 const static char WILD_ONE = '?';
44
45 /** zero or many characters wild card */
46 const static char WILD_MANY = '*';
47
48 /** escape sequence character */
49 const static char WILD_ESCAPE = '\\';
50
51 /** used for storing matcher patterns */
52 std::unordered_set<std::string> m_patterns;
53};
Enables comparison of strings against particular set of patterns.
Definition: pattern_matcher.h:35
static const char WILD_ESCAPE
escape sequence character
Definition: pattern_matcher.h:49
size_t add_patterns(const std::string &patterns, char delimiter=':')
Parses concatenated patterns and adds them to internal pattern list.
Definition: pattern_matcher.cc:38
static const char WILD_ONE
any (single) character wild card
Definition: pattern_matcher.h:43
void clear()
Removes all previously stored patterns from pattern matcher.
Definition: pattern_matcher.cc:95
bool is_matching(const std::string &text, const CHARSET_INFO *info) const
Verifies whether text matches any of the matcher internal patterns.
Definition: pattern_matcher.cc:76
std::unordered_set< std::string > m_patterns
used for storing matcher patterns
Definition: pattern_matcher.h:52
static const char WILD_MANY
zero or many characters wild card
Definition: pattern_matcher.h:46
A better implementation of the UNIX ctype(3) library.
Log info(cout, "NOTE")
const char * delimiter
Definition: mysqlslap.cc:154
Definition: m_ctype.h:354