73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
/*
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* Copyright (C) 2020, KylinSoft Co., Ltd.
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*
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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 as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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 for more details.
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*
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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, see <https://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifndef CPPJIEBA_PRE_FILTER_H
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#define CPPJIEBA_PRE_FILTER_H
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#include "Trie.hpp"
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#include "limonp/Logging.hpp"
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namespace cppjieba {
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class PreFilter {
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public:
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//TODO use WordRange instead of Range
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struct Range {
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RuneStrArray::const_iterator begin;
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RuneStrArray::const_iterator end;
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}; // struct Range
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PreFilter(const unordered_set<Rune>& symbols,
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const string& sentence)
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: symbols_(symbols) {
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if (!DecodeRunesInString(sentence, sentence_)) {
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XLOG(ERROR) << "decode failed. ";
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}
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cursor_ = sentence_.begin();
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}
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~PreFilter() {
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}
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bool HasNext() const {
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return cursor_ != sentence_.end();
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}
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Range Next() {
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Range range;
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range.begin = cursor_;
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while (cursor_ != sentence_.end()) {
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if (IsIn(symbols_, cursor_->rune)) {
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if (range.begin == cursor_) {
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cursor_ ++;
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}
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range.end = cursor_;
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return range;
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}
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cursor_ ++;
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}
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range.end = sentence_.end();
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return range;
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}
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private:
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RuneStrArray::const_iterator cursor_;
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RuneStrArray sentence_;
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const unordered_set<Rune>& symbols_;
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}; // class PreFilter
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} // namespace cppjieba
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#endif // CPPJIEBA_PRE_FILTER_H
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