1 /* 2 * Open Chinese Convert 3 * 4 * Copyright 2010-2014 BYVoid <byvoid@byvoid.com> 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 #include "Dict.hpp" 20 21 using namespace opencc; 22 MatchPrefix(const char * word) const23Optional<const DictEntry*> Dict::MatchPrefix(const char* word) const { 24 string wordTrunc = UTF8Util::TruncateUTF8(word, KeyMaxLength()); 25 const char* wordTruncPtr = wordTrunc.c_str() + wordTrunc.length(); 26 for (long len = static_cast<long>(wordTrunc.length()); len > 0;) { 27 wordTrunc.resize(static_cast<size_t>(len)); 28 wordTruncPtr = wordTrunc.c_str() + len; 29 const Optional<const DictEntry*>& result = Match(wordTrunc.c_str()); 30 if (!result.IsNull()) { 31 return result; 32 } 33 len -= static_cast<long>(UTF8Util::PrevCharLength(wordTruncPtr)); 34 } 35 return Optional<const DictEntry*>::Null(); 36 } 37 MatchAllPrefixes(const char * word) const38vector<const DictEntry*> Dict::MatchAllPrefixes(const char* word) const { 39 vector<const DictEntry*> matchedLengths; 40 string wordTrunc = UTF8Util::TruncateUTF8(word, KeyMaxLength()); 41 const char* wordTruncPtr = wordTrunc.c_str() + wordTrunc.length(); 42 for (long len = static_cast<long>(wordTrunc.length()); len > 0; 43 len -= static_cast<long>(UTF8Util::PrevCharLength(wordTruncPtr))) { 44 wordTrunc.resize(static_cast<size_t>(len)); 45 wordTruncPtr = wordTrunc.c_str() + len; 46 const Optional<const DictEntry*>& result = Match(wordTrunc.c_str()); 47 if (!result.IsNull()) { 48 matchedLengths.push_back(result.Get()); 49 } 50 } 51 return matchedLengths; 52 } 53