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/*
* Copyright (C) 2009 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_DICTIONARY_H
#define LATINIME_DICTIONARY_H
#include "bigram_dictionary.h"
#include "defines.h"
#include "proximity_info.h"
#include "unigram_dictionary.h"
namespace latinime {
class Dictionary {
public:
Dictionary(void *dict, int dictSize, int mmapFd, int dictBufAdjust, int typedLetterMultipler,
int fullWordMultiplier, int maxWordLength, int maxWords, int maxAlternatives);
int getSuggestions(ProximityInfo *proximityInfo, int *xcoordinates, int *ycoordinates,
int *codes, int codesSize, int flags, unsigned short *outWords, int *frequencies) {
return mUnigramDictionary->getSuggestions(proximityInfo, xcoordinates, ycoordinates, codes,
codesSize, flags, outWords, frequencies);
}
// TODO: Call mBigramDictionary instead of mUnigramDictionary
int getBigrams(unsigned short *word, int length, int *codes, int codesSize,
unsigned short *outWords, int *frequencies, int maxWordLength, int maxBigrams,
int maxAlternatives) {
return mBigramDictionary->getBigrams(word, length, codes, codesSize, outWords, frequencies,
maxWordLength, maxBigrams, maxAlternatives);
}
bool isValidWord(unsigned short *word, int length);
int isValidWordRec(int pos, unsigned short *word, int offset, int length);
void *getDict() { return (void *)mDict; }
int getDictSize() { return mDictSize; }
int getMmapFd() { return mMmapFd; }
int getDictBufAdjust() { return mDictBufAdjust; }
~Dictionary();
// public static utility methods
// static inline methods should be defined in the header file
static unsigned short getChar(const unsigned char *dict, int *pos);
static int getCount(const unsigned char *dict, int *pos);
static bool getTerminal(const unsigned char *dict, int *pos);
static int getAddress(const unsigned char *dict, int *pos);
static int getFreq(const unsigned char *dict, const bool isLatestDictVersion, int *pos);
static int wideStrLen(unsigned short *str);
// returns next sibling's position
static int setDictionaryValues(const unsigned char *dict, const bool isLatestDictVersion,
const int pos, unsigned short *c, int *childrenPosition,
bool *terminal, int *freq);
private:
bool hasBigram();
const unsigned char *mDict;
// Used only for the mmap version of dictionary loading, but we use these as dummy variables
// also for the malloc version.
const int mDictSize;
const int mMmapFd;
const int mDictBufAdjust;
const bool IS_LATEST_DICT_VERSION;
UnigramDictionary *mUnigramDictionary;
BigramDictionary *mBigramDictionary;
};
// ----------------------------------------------------------------------------
// public static utility methods
// static inline methods should be defined in the header file
inline unsigned short Dictionary::getChar(const unsigned char *dict, int *pos) {
unsigned short ch = (unsigned short) (dict[(*pos)++] & 0xFF);
// If the code is 255, then actual 16 bit code follows (in big endian)
if (ch == 0xFF) {
ch = ((dict[*pos] & 0xFF) << 8) | (dict[*pos + 1] & 0xFF);
(*pos) += 2;
}
return ch;
}
inline int Dictionary::getCount(const unsigned char *dict, int *pos) {
return dict[(*pos)++] & 0xFF;
}
inline bool Dictionary::getTerminal(const unsigned char *dict, int *pos) {
return (dict[*pos] & FLAG_TERMINAL_MASK) > 0;
}
inline int Dictionary::getAddress(const unsigned char *dict, int *pos) {
int address = 0;
if ((dict[*pos] & FLAG_ADDRESS_MASK) == 0) {
*pos += 1;
} else {
address += (dict[*pos] & (ADDRESS_MASK >> 16)) << 16;
address += (dict[*pos + 1] & 0xFF) << 8;
address += (dict[*pos + 2] & 0xFF);
*pos += 3;
}
return address;
}
inline int Dictionary::getFreq(const unsigned char *dict,
const bool isLatestDictVersion, int *pos) {
int freq = dict[(*pos)++] & 0xFF;
if (isLatestDictVersion) {
// skipping bigram
int bigramExist = (dict[*pos] & FLAG_BIGRAM_READ);
if (bigramExist > 0) {
int nextBigramExist = 1;
while (nextBigramExist > 0) {
(*pos) += 3;
nextBigramExist = (dict[(*pos)++] & FLAG_BIGRAM_CONTINUED);
}
} else {
(*pos)++;
}
}
return freq;
}
inline int Dictionary::wideStrLen(unsigned short *str) {
if (!str) return 0;
unsigned short *end = str;
while (*end)
end++;
return end - str;
}
inline int Dictionary::setDictionaryValues(const unsigned char *dict,
const bool isLatestDictVersion, const int pos, unsigned short *c,int *childrenPosition,
bool *terminal, int *freq) {
int position = pos;
// -- at char
*c = Dictionary::getChar(dict, &position);
// -- at flag/add
*terminal = Dictionary::getTerminal(dict, &position);
*childrenPosition = Dictionary::getAddress(dict, &position);
// -- after address or flag
*freq = (*terminal) ? Dictionary::getFreq(dict, isLatestDictVersion, &position) : 1;
// returns next sibling's position
return position;
}
}; // namespace latinime
#endif // LATINIME_DICTIONARY_H
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