fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
/*
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* Copyright (C) 2019-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include "bytes.hh"
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#include <memory>
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/// Implements <code>text LIKE pattern</code>.
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///
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/// The pattern is a string of characters with two wildcards:
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/// - '_' matches any single character
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/// - '%' matches any substring (including an empty string)
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/// - '\' escapes the next pattern character, so it matches verbatim
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/// - any other pattern character matches itself
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///
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/// The whole text must match the pattern; thus <code>'abc' LIKE 'a'</code> doesn't match, but
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/// <code>'abc' LIKE 'a%'</code> matches.
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class like_matcher {
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class impl;
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std::unique_ptr<impl> _impl;
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public:
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/// Compiles \c pattern and stores the result.
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///
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/// \param pattern UTF-8 encoded pattern with wildcards '_' and '%'.
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explicit like_matcher(bytes_view pattern);
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like_matcher(like_matcher&&) noexcept; // Must be defined in .cc, where class impl is known.
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~like_matcher();
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/// Runs the compiled pattern on \c text.
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///
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/// \return true iff text matches constructor's pattern.
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bool operator()(bytes_view text) const;
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/// Resets pattern if different from the current one.
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void reset(bytes_view pattern);
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};
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