8fbd552292
Bug: 3311719 Change-Id: Ie596304070e321ad23fb67a13bf05e2b6af1b54b
160 lines
5.7 KiB
C++
160 lines
5.7 KiB
C++
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LATINIME_DICTIONARY_H
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#define LATINIME_DICTIONARY_H
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#include "bigram_dictionary.h"
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#include "defines.h"
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#include "proximity_info.h"
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#include "unigram_dictionary.h"
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namespace latinime {
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class Dictionary {
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public:
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Dictionary(void *dict, int dictSize, int mmapFd, int dictBufAdjust, int typedLetterMultipler,
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int fullWordMultiplier, int maxWordLength, int maxWords, int maxAlternatives);
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int getSuggestions(ProximityInfo *proximityInfo, int *xcoordinates, int *ycoordinates,
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int *codes, int codesSize, unsigned short *outWords, int *frequencies) {
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return mUnigramDictionary->getSuggestions(proximityInfo, xcoordinates, ycoordinates, codes,
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codesSize, outWords, frequencies);
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}
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// TODO: Call mBigramDictionary instead of mUnigramDictionary
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int getBigrams(unsigned short *word, int length, int *codes, int codesSize,
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unsigned short *outWords, int *frequencies, int maxWordLength, int maxBigrams,
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int maxAlternatives) {
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return mBigramDictionary->getBigrams(word, length, codes, codesSize, outWords, frequencies,
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maxWordLength, maxBigrams, maxAlternatives);
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}
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bool isValidWord(unsigned short *word, int length);
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int isValidWordRec(int pos, unsigned short *word, int offset, int length);
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void *getDict() { return (void *)mDict; }
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int getDictSize() { return mDictSize; }
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int getMmapFd() { return mMmapFd; }
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int getDictBufAdjust() { return mDictBufAdjust; }
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~Dictionary();
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// public static utility methods
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// static inline methods should be defined in the header file
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static unsigned short getChar(const unsigned char *dict, int *pos);
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static int getCount(const unsigned char *dict, int *pos);
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static bool getTerminal(const unsigned char *dict, int *pos);
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static int getAddress(const unsigned char *dict, int *pos);
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static int getFreq(const unsigned char *dict, const bool isLatestDictVersion, int *pos);
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static int wideStrLen(unsigned short *str);
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// returns next sibling's position
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static int setDictionaryValues(const unsigned char *dict, const bool isLatestDictVersion,
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const int pos, unsigned short *c, int *childrenPosition,
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bool *terminal, int *freq);
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private:
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bool hasBigram();
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const unsigned char *mDict;
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// Used only for the mmap version of dictionary loading, but we use these as dummy variables
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// also for the malloc version.
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const int mDictSize;
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const int mMmapFd;
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const int mDictBufAdjust;
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const bool IS_LATEST_DICT_VERSION;
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UnigramDictionary *mUnigramDictionary;
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BigramDictionary *mBigramDictionary;
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};
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// ----------------------------------------------------------------------------
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// public static utility methods
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// static inline methods should be defined in the header file
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inline unsigned short Dictionary::getChar(const unsigned char *dict, int *pos) {
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unsigned short ch = (unsigned short) (dict[(*pos)++] & 0xFF);
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// If the code is 255, then actual 16 bit code follows (in big endian)
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if (ch == 0xFF) {
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ch = ((dict[*pos] & 0xFF) << 8) | (dict[*pos + 1] & 0xFF);
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(*pos) += 2;
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}
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return ch;
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}
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inline int Dictionary::getCount(const unsigned char *dict, int *pos) {
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return dict[(*pos)++] & 0xFF;
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}
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inline bool Dictionary::getTerminal(const unsigned char *dict, int *pos) {
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return (dict[*pos] & FLAG_TERMINAL_MASK) > 0;
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}
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inline int Dictionary::getAddress(const unsigned char *dict, int *pos) {
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int address = 0;
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if ((dict[*pos] & FLAG_ADDRESS_MASK) == 0) {
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*pos += 1;
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} else {
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address += (dict[*pos] & (ADDRESS_MASK >> 16)) << 16;
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address += (dict[*pos + 1] & 0xFF) << 8;
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address += (dict[*pos + 2] & 0xFF);
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*pos += 3;
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}
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return address;
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}
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inline int Dictionary::getFreq(const unsigned char *dict,
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const bool isLatestDictVersion, int *pos) {
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int freq = dict[(*pos)++] & 0xFF;
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if (isLatestDictVersion) {
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// skipping bigram
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int bigramExist = (dict[*pos] & FLAG_BIGRAM_READ);
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if (bigramExist > 0) {
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int nextBigramExist = 1;
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while (nextBigramExist > 0) {
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(*pos) += 3;
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nextBigramExist = (dict[(*pos)++] & FLAG_BIGRAM_CONTINUED);
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}
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} else {
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(*pos)++;
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}
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}
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return freq;
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}
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inline int Dictionary::wideStrLen(unsigned short *str) {
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if (!str) return 0;
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unsigned short *end = str;
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while (*end)
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end++;
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return end - str;
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}
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inline int Dictionary::setDictionaryValues(const unsigned char *dict,
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const bool isLatestDictVersion, const int pos, unsigned short *c,int *childrenPosition,
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bool *terminal, int *freq) {
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int position = pos;
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// -- at char
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*c = Dictionary::getChar(dict, &position);
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// -- at flag/add
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*terminal = Dictionary::getTerminal(dict, &position);
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*childrenPosition = Dictionary::getAddress(dict, &position);
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// -- after address or flag
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*freq = (*terminal) ? Dictionary::getFreq(dict, isLatestDictVersion, &position) : 1;
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// returns next sibling's position
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return position;
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}
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}; // namespace latinime
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#endif // LATINIME_DICTIONARY_H
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