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18e4be616c
In completion, underscore prefixed builtin macros may be annoying when the first type character is not an underscore. When `strict` is true, `Match` enforces the first characters should be loosely of the same category.
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
/* Copyright 2017-2018 ccls Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#pragma once
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#include <limits.h>
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#include <string>
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#include <string_view>
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namespace ccls {
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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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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 ccls
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