38 lines
976 B
C++
38 lines
976 B
C++
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// Copyright 2017-2018 ccls Authors
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include <climits>
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#include <string>
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#include <string_view>
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namespace ivy {
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class FuzzyMatcher {
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public:
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constexpr static int kMaxPat = 100;
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constexpr static int kMaxText = 200;
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// Negative but far from INT_MIN so that intermediate results are hard to
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// overflow.
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constexpr static int kMinScore = INT_MIN / 4;
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// 0: case-insensitive
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// 1: case-folded, i.e. insensitive if no input character is uppercase.
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// 2: case-sensitive
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FuzzyMatcher(std::string_view pattern, int case_sensitivity);
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int match(std::string_view text, bool strict);
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private:
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int case_sensitivity;
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std::string pat;
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std::string_view text;
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int pat_set, text_set;
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char low_pat[kMaxPat], low_text[kMaxText];
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int pat_role[kMaxPat], text_role[kMaxText];
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int dp[2][kMaxText + 1][2];
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int matchScore(int i, int j, bool last);
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int missScore(int j, bool last);
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};
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} // namespace ivy
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