File size: 2,143 Bytes
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 53 54 55 56 57 58 59 | /*
* 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 <algorithm>
#include "Dict.hpp"
using namespace opencc;
Optional<const DictEntry*> Dict::MatchPrefix(const char* word,
size_t wordLen) const {
long len = static_cast<long>((std::min)(KeyMaxLength(), wordLen));
std::string wordTrunc = UTF8Util::TruncateUTF8(word, len);
const char* wordTruncPtr = wordTrunc.c_str() + len;
for (; len > 0;) {
wordTrunc.resize(static_cast<size_t>(len));
wordTruncPtr = wordTrunc.c_str() + len;
const Optional<const DictEntry*>& result = Match(wordTrunc.c_str());
if (!result.IsNull()) {
return result;
}
len -= static_cast<long>(UTF8Util::PrevCharLength(wordTruncPtr));
}
return Optional<const DictEntry*>::Null();
}
std::vector<const DictEntry*> Dict::MatchAllPrefixes(const char* word,
size_t wordLen) const {
std::vector<const DictEntry*> matchedLengths;
long len = static_cast<long>((std::min)(KeyMaxLength(), wordLen));
std::string wordTrunc = UTF8Util::TruncateUTF8(word, len);
const char* wordTruncPtr = wordTrunc.c_str() + len;
for (; len > 0;
len -= static_cast<long>(UTF8Util::PrevCharLength(wordTruncPtr))) {
wordTrunc.resize(static_cast<size_t>(len));
wordTruncPtr = wordTrunc.c_str() + len;
const Optional<const DictEntry*>& result = Match(wordTrunc.c_str());
if (!result.IsNull()) {
matchedLengths.push_back(result.Get());
}
}
return matchedLengths;
}
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