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/*
* Open Chinese Convert
*
* Copyright 2010-2026 Carbo Kuo and contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "Common.hpp"
#include "Dict.hpp"
namespace opencc {
class OPENCC_EXPORT PrefixMatch {
public:
class Tables;
struct Match {
bool matched;
size_t keyLength;
const std::string* key;
const std::string* value;
};
explicit PrefixMatch(const DictPtr& dict);
~PrefixMatch();
Match MatchPrefix(const char* word, size_t len) const;
/**
* Like MatchPrefix but returns non-owning string_view fields without
* copying key or value into thread-local storage.
*
* Lifetime of the returned views:
* - @b key: points into the caller's input buffer (fast-path singleDict,
* where both MarisaDict and DartsDict return a slice of @p word) or into
* PrefixMatch-owned table storage (table-path LeafMatcher). Callers
* must not assume one or the other; copy if the key needs to outlive the
* current input position.
* - @b value: valid for the lifetime of the underlying dictionary
* (fast-path) or the lifetime of this PrefixMatch's tables (table-path).
*/
PrefixMatchView MatchPrefixView(const char* word, size_t len) const;
private:
static void AppendCacheKey(const DictPtr& dict, std::string* output);
static void CollectLeafDicts(const DictPtr& dict,
std::vector<std::weak_ptr<const Dict>>* output);
std::shared_ptr<const Tables> tables;
DictPtr singleDict;
};
} // namespace opencc