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54 lines
2.0 KiB
54 lines
2.0 KiB
5 months ago
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/*
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Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <m_ctype.h>
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#include <string>
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#include <unordered_set>
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/**
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Enables comparison of strings against particular set of patterns. Patterns
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may contain wildcards (WILD_ONE/WILD_MANY/WILD_ESCAPE). Pattern strings may
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be added to the class through a special method. Matching method traverses all
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of the patterns within pattern matcher in search for a match.
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*/
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class Pattern_matcher {
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public:
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size_t add_patterns(const std::string &patterns, char delimiter = ':');
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bool is_matching(const std::string &text, const CHARSET_INFO *info) const;
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void clear();
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private:
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/** any (single) character wild card */
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const static char WILD_ONE = '?';
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/** zero or many characters wild card */
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const static char WILD_MANY = '*';
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/** escape sequence character */
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const static char WILD_ESCAPE = '\\';
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/** used for storing matcher patterns */
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std::unordered_set<std::string> m_patterns;
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};
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