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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef LATINIME_BINARY_DICTIONARY_BIGRAMS_ITERATOR_H
     18 #define LATINIME_BINARY_DICTIONARY_BIGRAMS_ITERATOR_H
     19 
     20 #include "defines.h"
     21 #include "dictionary/interface/dictionary_bigrams_structure_policy.h"
     22 
     23 namespace latinime {
     24 
     25 class BinaryDictionaryBigramsIterator {
     26  public:
     27     // Empty iterator.
     28     BinaryDictionaryBigramsIterator()
     29            : mBigramsStructurePolicy(nullptr), mPos(NOT_A_DICT_POS),
     30              mBigramPos(NOT_A_DICT_POS), mProbability(NOT_A_PROBABILITY), mHasNext(false) {}
     31 
     32     BinaryDictionaryBigramsIterator(
     33             const DictionaryBigramsStructurePolicy *const bigramsStructurePolicy, const int pos)
     34             : mBigramsStructurePolicy(bigramsStructurePolicy), mPos(pos),
     35               mBigramPos(NOT_A_DICT_POS), mProbability(NOT_A_PROBABILITY),
     36               mHasNext(pos != NOT_A_DICT_POS) {}
     37 
     38     BinaryDictionaryBigramsIterator(BinaryDictionaryBigramsIterator &&bigramsIterator)
     39             : mBigramsStructurePolicy(bigramsIterator.mBigramsStructurePolicy),
     40               mPos(bigramsIterator.mPos), mBigramPos(bigramsIterator.mBigramPos),
     41               mProbability(bigramsIterator.mProbability), mHasNext(bigramsIterator.mHasNext) {}
     42 
     43     AK_FORCE_INLINE bool hasNext() const {
     44         return mHasNext;
     45     }
     46 
     47     AK_FORCE_INLINE void next() {
     48         mBigramsStructurePolicy->getNextBigram(&mBigramPos, &mProbability, &mHasNext, &mPos);
     49     }
     50 
     51     AK_FORCE_INLINE int getProbability() const {
     52         return mProbability;
     53     }
     54 
     55     AK_FORCE_INLINE int getBigramPos() const {
     56         return mBigramPos;
     57     }
     58 
     59  private:
     60     DISALLOW_COPY_AND_ASSIGN(BinaryDictionaryBigramsIterator);
     61 
     62     const DictionaryBigramsStructurePolicy *const mBigramsStructurePolicy;
     63     int mPos;
     64     int mBigramPos;
     65     int mProbability;
     66     bool mHasNext;
     67 };
     68 } // namespace latinime
     69 #endif // LATINIME_BINARY_DICTIONARY_BIGRAMS_ITERATOR_H
     70