Detach bigram functionarities from unigram_dictionary

Change-Id: Ie35164a5f293e5370885a1ba13d6ed7caf6000ec
diff --git a/native/src/unigram_dictionary.h b/native/src/unigram_dictionary.h
index 4cb1abe..557e54c 100644
--- a/native/src/unigram_dictionary.h
+++ b/native/src/unigram_dictionary.h
@@ -24,63 +24,42 @@
 class UnigramDictionary {
 public:
     UnigramDictionary(const unsigned char *dict, int typedLetterMultipler, int fullWordMultiplier,
-            int maxWordLength, int maxWords, int maxAlternatives,  const bool isLatestDictVersion,
-            const bool hasBigram, Dictionary *parentDictionary);
+            int maxWordLength, int maxWords, int maxAlternatives,  const bool isLatestDictVersion);
     int getSuggestions(int *codes, int codesSize, unsigned short *outWords, int *frequencies,
             int *nextLetters, int nextLettersSize);
-    int getBigrams(unsigned short *word, int length, int *codes, int codesSize,
-            unsigned short *outWords, int *frequencies, int maxWordLength, int maxBigrams,
-            int maxAlternatives);
     ~UnigramDictionary();
 
 private:
     void initSuggestions(int *codes, int codesSize, unsigned short *outWords, int *frequencies);
-    int getSuggestionCandidates(int inputLength, int skipPos, int *nextLetters, int nextLettersSize);
+    int getSuggestionCandidates(int inputLength, int skipPos, int *nextLetters,
+            int nextLettersSize);
     void getVersionNumber();
     bool checkIfDictVersionIsLatest();
     int getAddress(int *pos);
-    int getBigramAddress(int *pos, bool advance);
     int getFreq(int *pos);
-    int getBigramFreq(int *pos);
-    void searchForTerminalNode(int address, int frequency);
-
-    bool getFirstBitOfByte(int *pos) { return (DICT[*pos] & 0x80) > 0; }
-    bool getSecondBitOfByte(int *pos) { return (DICT[*pos] & 0x40) > 0; }
-    bool getTerminal(int *pos) { return (DICT[*pos] & FLAG_TERMINAL_MASK) > 0; }
     int wideStrLen(unsigned short *str);
 
     bool sameAsTyped(unsigned short *word, int length);
-    bool checkFirstCharacter(unsigned short *word);
     bool addWord(unsigned short *word, int length, int frequency);
-    bool addWordBigram(unsigned short *word, int length, int frequency);
     unsigned short toLowerCase(unsigned short c);
     void getWordsRec(int pos, int depth, int maxDepth, bool completion, int frequency,
             int inputIndex, int diffs, int skipPos, int *nextLetters, int nextLettersSize);
     void registerNextLetter(unsigned short c, int *nextLetters, int nextLettersSize);
 
     const unsigned char *DICT;
-
     const int MAX_WORDS;
     const int MAX_WORD_LENGTH;
     const int MAX_ALTERNATIVES;
     const bool IS_LATEST_DICT_VERSION;
-    const bool HAS_BIGRAM;
+    const int TYPED_LETTER_MULTIPLIER;
+    const int FULL_WORD_MULTIPLIER;
 
-    Dictionary *mParentDictionary;
     int *mFrequencies;
-    int *mBigramFreq;
-    int mMaxBigrams;
     unsigned short *mOutputChars;
-    unsigned short *mBigramChars;
     int *mInputCodes;
     int mInputLength;
     unsigned short mWord[128];
     int mMaxEditDistance;
-
-    int mFullWordMultiplier;
-    int mTypedLetterMultiplier;
-    int mVersion;
-    int mBigram;
 };
 
 // ----------------------------------------------------------------------------