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diff --git a/native/jni/src/obsolete/unigram_dictionary.h b/native/jni/src/obsolete/unigram_dictionary.h
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+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef LATINIME_UNIGRAM_DICTIONARY_H
+#define LATINIME_UNIGRAM_DICTIONARY_H
+
+#include <map>
+#include <stdint.h>
+
+#include "defines.h"
+#include "suggest/core/dictionary/digraph_utils.h"
+
+namespace latinime {
+
+class BinaryDictionaryInfo;
+class Correction;
+class ProximityInfo;
+class TerminalAttributes;
+class WordsPriorityQueuePool;
+
+class UnigramDictionary {
+ public:
+    // Error tolerances
+    static const int DEFAULT_MAX_ERRORS = 2;
+    static const int MAX_ERRORS_FOR_TWO_WORDS = 1;
+
+    static const int FLAG_MULTIPLE_SUGGEST_ABORT = 0;
+    static const int FLAG_MULTIPLE_SUGGEST_SKIP = 1;
+    static const int FLAG_MULTIPLE_SUGGEST_CONTINUE = 2;
+
+    UnigramDictionary(const BinaryDictionaryInfo *const binaryDicitonaryInfo,
+            const uint8_t dictFlags);
+    virtual ~UnigramDictionary();
+    int getProbability(const int *const inWord, const int length) const;
+    int getBigramPosition(int pos, int *word, int offset, int length) const;
+    int getSuggestions(ProximityInfo *proximityInfo, const int *xcoordinates,
+            const int *ycoordinates, const int *inputCodePoints, const int inputSize,
+            const std::map<int, int> *bigramMap, const uint8_t *bigramFilter,
+            const bool useFullEditDistance, int *outWords, int *frequencies,
+            int *outputTypes) const;
+    int getDictFlags() const { return DICT_FLAGS; }
+
+ private:
+    DISALLOW_IMPLICIT_CONSTRUCTORS(UnigramDictionary);
+    void getWordSuggestions(ProximityInfo *proximityInfo, const int *xcoordinates,
+            const int *ycoordinates, const int *inputCodePoints, const int inputSize,
+            const std::map<int, int> *bigramMap, const uint8_t *bigramFilter,
+            const bool useFullEditDistance, Correction *correction,
+            WordsPriorityQueuePool *queuePool) const;
+    int getDigraphReplacement(const int *codes, const int i, const int inputSize,
+            const DigraphUtils::digraph_t *const digraphs, const unsigned int digraphsSize) const;
+    void getWordWithDigraphSuggestionsRec(ProximityInfo *proximityInfo, const int *xcoordinates,
+            const int *ycoordinates, const int *codesBuffer, int *xCoordinatesBuffer,
+            int *yCoordinatesBuffer, const int codesBufferSize, const std::map<int, int> *bigramMap,
+            const uint8_t *bigramFilter, const bool useFullEditDistance, const int *codesSrc,
+            const int codesRemain, const int currentDepth, int *codesDest, Correction *correction,
+            WordsPriorityQueuePool *queuePool, const DigraphUtils::digraph_t *const digraphs,
+            const unsigned int digraphsSize) const;
+    void initSuggestions(ProximityInfo *proximityInfo, const int *xcoordinates,
+            const int *ycoordinates, const int *codes, const int inputSize,
+            Correction *correction) const;
+    void getOneWordSuggestions(ProximityInfo *proximityInfo, const int *xcoordinates,
+            const int *ycoordinates, const int *codes, const std::map<int, int> *bigramMap,
+            const uint8_t *bigramFilter, const bool useFullEditDistance, const int inputSize,
+            Correction *correction, WordsPriorityQueuePool *queuePool) const;
+    void getSuggestionCandidates(
+            const bool useFullEditDistance, const int inputSize,
+            const std::map<int, int> *bigramMap, const uint8_t *bigramFilter,
+            Correction *correction, WordsPriorityQueuePool *queuePool, const bool doAutoCompletion,
+            const int maxErrors, const int currentWordIndex) const;
+    void getSplitMultipleWordsSuggestions(ProximityInfo *proximityInfo, const int *xcoordinates,
+            const int *ycoordinates, const int *codes, const bool useFullEditDistance,
+            const int inputSize, Correction *correction, WordsPriorityQueuePool *queuePool,
+            const bool hasAutoCorrectionCandidate) const;
+    void onTerminal(const int freq, const TerminalAttributes &terminalAttributes,
+            Correction *correction, WordsPriorityQueuePool *queuePool, const bool addToMasterQueue,
+            const int currentWordIndex) const;
+    // Process a node by considering proximity, missing and excessive character
+    bool processCurrentNode(const int initialPos, const std::map<int, int> *bigramMap,
+            const uint8_t *bigramFilter, Correction *correction, int *newCount,
+            int *newChildPosition, int *nextSiblingPosition, WordsPriorityQueuePool *queuePool,
+            const int currentWordIndex) const;
+    int getMostProbableWordLike(const int startInputIndex, const int inputSize,
+            Correction *correction, int *word) const;
+    int getMostProbableWordLikeInner(const int *const inWord, const int inputSize,
+            int *outWord) const;
+    int getSubStringSuggestion(ProximityInfo *proximityInfo, const int *xcoordinates,
+            const int *ycoordinates, const int *codes, const bool useFullEditDistance,
+            Correction *correction, WordsPriorityQueuePool *queuePool, const int inputSize,
+            const bool hasAutoCorrectionCandidate, const int currentWordIndex,
+            const int inputWordStartPos, const int inputWordLength, const int outputWordStartPos,
+            const bool isSpaceProximity, int *freqArray, int *wordLengthArray, int *outputWord,
+            int *outputWordLength) const;
+    void getMultiWordsSuggestionRec(ProximityInfo *proximityInfo, const int *xcoordinates,
+            const int *ycoordinates, const int *codes, const bool useFullEditDistance,
+            const int inputSize, Correction *correction, WordsPriorityQueuePool *queuePool,
+            const bool hasAutoCorrectionCandidate, const int startPos, const int startWordIndex,
+            const int outputWordLength, int *freqArray, int *wordLengthArray,
+            int *outputWord) const;
+
+    const BinaryDictionaryInfo *const mBinaryDicitonaryInfo;
+    const int MAX_DIGRAPH_SEARCH_DEPTH;
+    const int DICT_FLAGS;
+};
+} // namespace latinime
+#endif // LATINIME_UNIGRAM_DICTIONARY_H