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2d8be8f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | /*
* Open Chinese Convert
*
* Copyright 2010-2014 Carbo Kuo <byvoid@byvoid.com>
*
* 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.
*/
#include "MaxMatchSegmentation.hpp"
using namespace opencc;
SegmentsPtr MaxMatchSegmentation::Segment(const std::string& text) const {
SegmentsPtr segments(new Segments);
const char* segStart = text.c_str();
size_t segLength = 0;
auto clearBuffer = [&segments, &segStart, &segLength]() {
if (segLength > 0) {
segments->AddSegment(UTF8Util::FromSubstr(segStart, segLength));
segLength = 0;
}
};
size_t length = text.length();
for (const char* pstr = text.c_str(); *pstr != '\0';) {
const Optional<const DictEntry*>& matched = dict->MatchPrefix(pstr, length);
size_t matchedLength;
if (matched.IsNull()) {
matchedLength = UTF8Util::NextCharLength(pstr);
segLength += matchedLength;
} else {
clearBuffer();
matchedLength = matched.Get()->KeyLength();
segments->AddSegment(matched.Get()->Key());
segStart = pstr + matchedLength;
}
pstr += matchedLength;
length -= matchedLength;
}
clearBuffer();
return segments;
}
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