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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
namespace latinime {
// 22-bit address = ~4MB dictionary size limit, which on average would be about 200k-300k words
#define ADDRESS_MASK 0x3FFFFF
// The bit that decides if an address follows in the next 22 bits
#define FLAG_ADDRESS_MASK 0x40
// The bit that decides if this is a terminal node for a word. The node could still have children,
// if the word has other endings.
#define FLAG_TERMINAL_MASK 0x80
class Dictionary {
public:
Dictionary(void *dict, int typedLetterMultipler, int fullWordMultiplier);
int getSuggestions(int *codes, int codesSize, unsigned short *outWords, int *frequencies,
int maxWordLength, int maxWords, int maxAlternatives, int skipPos,
int *nextLetters, int nextLettersSize);
bool isValidWord(unsigned short *word, int length);
void setAsset(void *asset) { mAsset = asset; }
void *getAsset() { return mAsset; }
~Dictionary();
private:
int getAddress(int *pos);
bool getTerminal(int *pos) { return (mDict[*pos] & FLAG_TERMINAL_MASK) > 0; }
int getFreq(int *pos) { return mDict[(*pos)++] & 0xFF; }
int getCount(int *pos) { return mDict[(*pos)++] & 0xFF; }
unsigned short getChar(int *pos);
int wideStrLen(unsigned short *str);
bool sameAsTyped(unsigned short *word, int length);
bool addWord(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);
bool isValidWordRec(int pos, unsigned short *word, int offset, int length);
void registerNextLetter(unsigned short c);
unsigned char *mDict;
void *mAsset;
int *mFrequencies;
int mMaxWords;
int mMaxWordLength;
unsigned short *mOutputChars;
int *mInputCodes;
int mInputLength;
int mMaxAlternatives;
unsigned short mWord[128];
int mSkipPos;
int mMaxEditDistance;
int mFullWordMultiplier;
int mTypedLetterMultiplier;
int *mNextLettersFrequencies;
int mNextLettersSize;
};
// ----------------------------------------------------------------------------
}; // namespace latinime
#endif // LATINIME_DICTIONARY_H
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