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Make native bigram dictionary const

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Change-Id: Id883f2d69483c9234877ad42446a582258e1cf91
This commit is contained in:
satok 2012-06-14 16:35:23 -07:00
parent 1bc038c5e4
commit b1ed1d47ac
6 changed files with 62 additions and 75 deletions
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62
native/jni/src/bigram_dictionary.cpp
View File

@ -27,9 +27,8 @@
namespace latinime {
BigramDictionary::BigramDictionary(const unsigned char *dict, int maxWordLength,
Dictionary *parentDictionary)
: DICT(dict), MAX_WORD_LENGTH(maxWordLength), mParentDictionary(parentDictionary) {
BigramDictionary::BigramDictionary(const unsigned char *dict, int maxWordLength)
: DICT(dict), MAX_WORD_LENGTH(maxWordLength) {
if (DEBUG_DICT) {
AKLOGI("BigramDictionary - constructor");
}
@ -38,7 +37,8 @@ BigramDictionary::BigramDictionary(const unsigned char *dict, int maxWordLength,
BigramDictionary::~BigramDictionary() {
}
bool BigramDictionary::addWordBigram(unsigned short *word, int length, int frequency) {
bool BigramDictionary::addWordBigram(unsigned short *word, int length, int frequency,
const int maxBigrams, int *bigramFreq, unsigned short *bigramChars) const {
word[length] = 0;
if (DEBUG_DICT) {
#ifdef FLAG_DBG
@ -50,25 +50,25 @@ bool BigramDictionary::addWordBigram(unsigned short *word, int length, int frequ
// Find the right insertion point
int insertAt = 0;
while (insertAt < mMaxBigrams) {
if (frequency > mBigramFreq[insertAt] || (mBigramFreq[insertAt] == frequency
&& length < Dictionary::wideStrLen(mBigramChars + insertAt * MAX_WORD_LENGTH))) {
while (insertAt < maxBigrams) {
if (frequency > bigramFreq[insertAt] || (bigramFreq[insertAt] == frequency
&& length < Dictionary::wideStrLen(bigramChars + insertAt * MAX_WORD_LENGTH))) {
break;
}
insertAt++;
}
if (DEBUG_DICT) {
AKLOGI("Bigram: InsertAt -> %d maxBigrams: %d", insertAt, mMaxBigrams);
AKLOGI("Bigram: InsertAt -> %d maxBigrams: %d", insertAt, maxBigrams);
}
if (insertAt < mMaxBigrams) {
memmove((char*) mBigramFreq + (insertAt + 1) * sizeof(mBigramFreq[0]),
(char*) mBigramFreq + insertAt * sizeof(mBigramFreq[0]),
(mMaxBigrams - insertAt - 1) * sizeof(mBigramFreq[0]));
mBigramFreq[insertAt] = frequency;
memmove((char*) mBigramChars + (insertAt + 1) * MAX_WORD_LENGTH * sizeof(short),
(char*) mBigramChars + (insertAt ) * MAX_WORD_LENGTH * sizeof(short),
(mMaxBigrams - insertAt - 1) * sizeof(short) * MAX_WORD_LENGTH);
unsigned short *dest = mBigramChars + (insertAt ) * MAX_WORD_LENGTH;
if (insertAt < maxBigrams) {
memmove((char*) bigramFreq + (insertAt + 1) * sizeof(bigramFreq[0]),
(char*) bigramFreq + insertAt * sizeof(bigramFreq[0]),
(maxBigrams - insertAt - 1) * sizeof(bigramFreq[0]));
bigramFreq[insertAt] = frequency;
memmove((char*) bigramChars + (insertAt + 1) * MAX_WORD_LENGTH * sizeof(short),
(char*) bigramChars + (insertAt ) * MAX_WORD_LENGTH * sizeof(short),
(maxBigrams - insertAt - 1) * sizeof(short) * MAX_WORD_LENGTH);
unsigned short *dest = bigramChars + (insertAt ) * MAX_WORD_LENGTH;
while (length--) {
*dest++ = *word++;
}
@ -84,7 +84,7 @@ bool BigramDictionary::addWordBigram(unsigned short *word, int length, int frequ
/* Parameters :
* prevWord: the word before, the one for which we need to look up bigrams.
* prevWordLength: its length.
* codes: what user typed, in the same format as for UnigramDictionary::getSuggestions.
* inputCodes: what user typed, in the same format as for UnigramDictionary::getSuggestions.
* codesSize: the size of the codes array.
* bigramChars: an array for output, at the same format as outwords for getSuggestions.
* bigramFreq: an array to output frequencies.
@ -98,15 +98,11 @@ bool BigramDictionary::addWordBigram(unsigned short *word, int length, int frequ
* and the bigrams are used to boost unigram result scores, it makes little sense to
* reduce their scope to the ones that match the first letter.
*/
int BigramDictionary::getBigrams(const int32_t *prevWord, int prevWordLength, int *codes,
int BigramDictionary::getBigrams(const int32_t *prevWord, int prevWordLength, int *inputCodes,
int codesSize, unsigned short *bigramChars, int *bigramFreq, int maxWordLength,
int maxBigrams) {
int maxBigrams) const {
// TODO: remove unused arguments, and refrain from storing stuff in members of this class
// TODO: have "in" arguments before "out" ones, and make out args explicit in the name
mBigramFreq = bigramFreq;
mBigramChars = bigramChars;
mInputCodes = codes;
mMaxBigrams = maxBigrams;
const uint8_t* const root = DICT;
int pos = getBigramListPositionForWord(prevWord, prevWordLength);
@ -124,16 +120,17 @@ int BigramDictionary::getBigrams(const int32_t *prevWord, int prevWordLength, in
bigramBuffer, &unigramFreq);
// codesSize == 0 means we are trying to find bigram predictions.
if (codesSize < 1 || checkFirstCharacter(bigramBuffer)) {
const int bigramFreq = UnigramDictionary::MASK_ATTRIBUTE_FREQUENCY & bigramFlags;
if (codesSize < 1 || checkFirstCharacter(bigramBuffer, inputCodes)) {
const int bigramFreqTemp = UnigramDictionary::MASK_ATTRIBUTE_FREQUENCY & bigramFlags;
// Due to space constraints, the frequency for bigrams is approximate - the lower the
// unigram frequency, the worse the precision. The theoritical maximum error in
// resulting frequency is 8 - although in the practice it's never bigger than 3 or 4
// in very bad cases. This means that sometimes, we'll see some bigrams interverted
// here, but it can't get too bad.
const int frequency =
BinaryFormat::computeFrequencyForBigram(unigramFreq, bigramFreq);
if (addWordBigram(bigramBuffer, length, frequency)) {
BinaryFormat::computeFrequencyForBigram(unigramFreq, bigramFreqTemp);
if (addWordBigram(
bigramBuffer, length, frequency, maxBigrams, bigramFreq, bigramChars)) {
++bigramCount;
}
}
@ -144,7 +141,7 @@ int BigramDictionary::getBigrams(const int32_t *prevWord, int prevWordLength, in
// Returns a pointer to the start of the bigram list.
// If the word is not found or has no bigrams, this function returns 0.
int BigramDictionary::getBigramListPositionForWord(const int32_t *prevWord,
const int prevWordLength) {
const int prevWordLength) const {
if (0 >= prevWordLength) return 0;
const uint8_t* const root = DICT;
int pos = BinaryFormat::getTerminalPosition(root, prevWord, prevWordLength);
@ -164,7 +161,7 @@ int BigramDictionary::getBigramListPositionForWord(const int32_t *prevWord,
}
void BigramDictionary::fillBigramAddressToFrequencyMapAndFilter(const int32_t *prevWord,
const int prevWordLength, std::map<int, int> *map, uint8_t *filter) {
const int prevWordLength, std::map<int, int> *map, uint8_t *filter) const {
memset(filter, 0, BIGRAM_FILTER_BYTE_SIZE);
const uint8_t* const root = DICT;
int pos = getBigramListPositionForWord(prevWord, prevWordLength);
@ -181,11 +178,10 @@ void BigramDictionary::fillBigramAddressToFrequencyMapAndFilter(const int32_t *p
} while (0 != (UnigramDictionary::FLAG_ATTRIBUTE_HAS_NEXT & bigramFlags));
}
bool BigramDictionary::checkFirstCharacter(unsigned short *word) {
bool BigramDictionary::checkFirstCharacter(unsigned short *word, int *inputCodes) const {
// Checks whether this word starts with same character or neighboring characters of
// what user typed.
int *inputCodes = mInputCodes;
int maxAlt = MAX_ALTERNATIVES;
const unsigned short firstBaseChar = toBaseLowerCase(*word);
while (maxAlt > 0) {
@ -199,7 +195,7 @@ bool BigramDictionary::checkFirstCharacter(unsigned short *word) {
}
bool BigramDictionary::isValidBigram(const int32_t *word1, int length1, const int32_t *word2,
int length2) {
int length2) const {
const uint8_t* const root = DICT;
int pos = getBigramListPositionForWord(word1, length1);
// getBigramListPositionForWord returns 0 if this word isn't in the dictionary or has no bigrams

24
native/jni/src/bigram_dictionary.h
View File

@ -27,35 +27,29 @@ namespace latinime {
class Dictionary;
class BigramDictionary {
public:
BigramDictionary(const unsigned char *dict, int maxWordLength, Dictionary *parentDictionary);
int getBigrams(const int32_t *word, int length, int *codes, int codesSize,
unsigned short *outWords, int *frequencies, int maxWordLength, int maxBigrams);
int getBigramListPositionForWord(const int32_t *prevWord, const int prevWordLength);
BigramDictionary(const unsigned char *dict, int maxWordLength);
int getBigrams(const int32_t *word, int length, int *inputCodes, int codesSize,
unsigned short *outWords, int *frequencies, int maxWordLength, int maxBigrams) const;
int getBigramListPositionForWord(const int32_t *prevWord, const int prevWordLength) const;
void fillBigramAddressToFrequencyMapAndFilter(const int32_t *prevWord, const int prevWordLength,
std::map<int, int> *map, uint8_t *filter);
bool isValidBigram(const int32_t *word1, int length1, const int32_t *word2, int length2);
std::map<int, int> *map, uint8_t *filter) const;
bool isValidBigram(const int32_t *word1, int length1, const int32_t *word2, int length2) const;
~BigramDictionary();
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(BigramDictionary);
bool addWordBigram(unsigned short *word, int length, int frequency);
bool addWordBigram(unsigned short *word, int length, int frequency, const int maxBigrams,
int *bigramFreq, unsigned short *bigramChars) const;
int getBigramAddress(int *pos, bool advance);
int getBigramFreq(int *pos);
void searchForTerminalNode(int addressLookingFor, int frequency);
bool getFirstBitOfByte(int *pos) { return (DICT[*pos] & 0x80) > 0; }
bool getSecondBitOfByte(int *pos) { return (DICT[*pos] & 0x40) > 0; }
bool checkFirstCharacter(unsigned short *word);
bool checkFirstCharacter(unsigned short *word, int *inputCodes) const;
const unsigned char *DICT;
const int MAX_WORD_LENGTH;
// TODO: Re-implement proximity correction for bigram correction
static const int MAX_ALTERNATIVES = 1;
Dictionary *mParentDictionary;
int *mBigramFreq;
int mMaxBigrams;
unsigned short *mBigramChars;
int *mInputCodes;
int mInputLength;
};
} // namespace latinime

9
native/jni/src/dictionary.cpp
View File

@ -38,27 +38,24 @@ Dictionary::Dictionary(void *dict, int dictSize, int mmapFd, int dictBufAdjust,
AKLOGI("IN NATIVE SUGGEST Version: %d", (mDict[0] & 0xFF));
}
}
mWordsPriorityQueuePool = new WordsPriorityQueuePool(
maxWords, SUB_QUEUE_MAX_WORDS, maxWordLength);
const unsigned int headerSize = BinaryFormat::getHeaderSize(mDict);
const unsigned int options = BinaryFormat::getFlags(mDict);
mUnigramDictionary = new UnigramDictionary(mDict + headerSize, typedLetterMultiplier,
fullWordMultiplier, maxWordLength, maxWords, options);
mBigramDictionary = new BigramDictionary(mDict + headerSize, maxWordLength, this);
mBigramDictionary = new BigramDictionary(mDict + headerSize, maxWordLength);
}
Dictionary::~Dictionary() {
delete mWordsPriorityQueuePool;
delete mUnigramDictionary;
delete mBigramDictionary;
}
int Dictionary::getFrequency(const int32_t *word, int length) {
int Dictionary::getFrequency(const int32_t *word, int length) const {
return mUnigramDictionary->getFrequency(word, length);
}
bool Dictionary::isValidBigram(const int32_t *word1, int length1, const int32_t *word2,
int length2) {
int length2) const {
return mBigramDictionary->isValidBigram(word1, length1, word2, length2);
}

21
native/jni/src/dictionary.h
View File

@ -35,28 +35,28 @@ class Dictionary {
int getSuggestions(ProximityInfo *proximityInfo, int *xcoordinates, int *ycoordinates,
int *codes, int codesSize, const int32_t* prevWordChars, const int prevWordLength,
bool useFullEditDistance, unsigned short *outWords, int *frequencies) {
bool useFullEditDistance, unsigned short *outWords, int *frequencies) const {
std::map<int, int> bigramMap;
uint8_t bigramFilter[BIGRAM_FILTER_BYTE_SIZE];
mBigramDictionary->fillBigramAddressToFrequencyMapAndFilter(prevWordChars,
prevWordLength, &bigramMap, bigramFilter);
return mUnigramDictionary->getSuggestions(proximityInfo, mWordsPriorityQueuePool,
return mUnigramDictionary->getSuggestions(proximityInfo,
xcoordinates, ycoordinates, codes, codesSize, &bigramMap,
bigramFilter, useFullEditDistance, outWords, frequencies);
}
int getBigrams(const int32_t *word, int length, int *codes, int codesSize,
unsigned short *outWords, int *frequencies, int maxWordLength, int maxBigrams) {
unsigned short *outWords, int *frequencies, int maxWordLength, int maxBigrams) const {
return mBigramDictionary->getBigrams(word, length, codes, codesSize, outWords, frequencies,
maxWordLength, maxBigrams);
}
int getFrequency(const int32_t *word, int length);
bool isValidBigram(const int32_t *word1, int length1, const int32_t *word2, int length2);
void *getDict() { return (void *)mDict; }
int getDictSize() { return mDictSize; }
int getMmapFd() { return mMmapFd; }
int getDictBufAdjust() { return mDictBufAdjust; }
int getFrequency(const int32_t *word, int length) const;
bool isValidBigram(const int32_t *word1, int length1, const int32_t *word2, int length2) const;
void *getDict() const { return (void *)mDict; }
int getDictSize() const { return mDictSize; }
int getMmapFd() const { return mMmapFd; }
int getDictBufAdjust() const { return mDictBufAdjust; }
~Dictionary();
// public static utility methods
@ -74,8 +74,7 @@ class Dictionary {
const int mDictBufAdjust;
const UnigramDictionary *mUnigramDictionary;
BigramDictionary *mBigramDictionary;
WordsPriorityQueuePool *mWordsPriorityQueuePool;
const BigramDictionary *mBigramDictionary;
};
// public static utility methods

17
native/jni/src/unigram_dictionary.cpp
View File

@ -170,12 +170,13 @@ void UnigramDictionary::getWordWithDigraphSuggestionsRec(ProximityInfo *proximit
// bigramFilter is a bloom filter for fast rejection: see functions setInFilter and isInFilter
// in bigram_dictionary.cpp
int UnigramDictionary::getSuggestions(ProximityInfo *proximityInfo,
WordsPriorityQueuePool *queuePool, const int *xcoordinates,
const int *xcoordinates,
const int *ycoordinates, const int *codes, const int codesSize,
const std::map<int, int> *bigramMap, const uint8_t *bigramFilter,
const bool useFullEditDistance, unsigned short *outWords, int *frequencies) const {
queuePool->clearAll();
WordsPriorityQueuePool queuePool(MAX_WORDS, SUB_QUEUE_MAX_WORDS, MAX_WORD_LENGTH);
queuePool.clearAll();
Correction masterCorrection;
masterCorrection.resetCorrection();
if (BinaryFormat::REQUIRES_GERMAN_UMLAUT_PROCESSING & FLAGS)
@ -186,7 +187,7 @@ int UnigramDictionary::getSuggestions(ProximityInfo *proximityInfo,
getWordWithDigraphSuggestionsRec(proximityInfo, xcoordinates, ycoordinates, codesBuffer,
xCoordinatesBuffer, yCoordinatesBuffer, codesSize, bigramMap, bigramFilter,
useFullEditDistance, codes, codesSize, 0, codesBuffer, &masterCorrection,
queuePool, GERMAN_UMLAUT_DIGRAPHS,
&queuePool, GERMAN_UMLAUT_DIGRAPHS,
sizeof(GERMAN_UMLAUT_DIGRAPHS) / sizeof(GERMAN_UMLAUT_DIGRAPHS[0]));
} else if (BinaryFormat::REQUIRES_FRENCH_LIGATURES_PROCESSING & FLAGS) {
int codesBuffer[getCodesBufferSize(codes, codesSize)];
@ -195,26 +196,26 @@ int UnigramDictionary::getSuggestions(ProximityInfo *proximityInfo,
getWordWithDigraphSuggestionsRec(proximityInfo, xcoordinates, ycoordinates, codesBuffer,
xCoordinatesBuffer, yCoordinatesBuffer, codesSize, bigramMap, bigramFilter,
useFullEditDistance, codes, codesSize, 0, codesBuffer, &masterCorrection,
queuePool, FRENCH_LIGATURES_DIGRAPHS,
&queuePool, FRENCH_LIGATURES_DIGRAPHS,
sizeof(FRENCH_LIGATURES_DIGRAPHS) / sizeof(FRENCH_LIGATURES_DIGRAPHS[0]));
} else { // Normal processing
getWordSuggestions(proximityInfo, xcoordinates, ycoordinates, codes, codesSize,
bigramMap, bigramFilter, useFullEditDistance, &masterCorrection, queuePool);
bigramMap, bigramFilter, useFullEditDistance, &masterCorrection, &queuePool);
}
PROF_START(20);
if (DEBUG_DICT) {
float ns = queuePool->getMasterQueue()->getHighestNormalizedScore(
float ns = queuePool.getMasterQueue()->getHighestNormalizedScore(
masterCorrection.getPrimaryInputWord(), codesSize, 0, 0, 0);
ns += 0;
AKLOGI("Max normalized score = %f", ns);
}
const int suggestedWordsCount =
queuePool->getMasterQueue()->outputSuggestions(
queuePool.getMasterQueue()->outputSuggestions(
masterCorrection.getPrimaryInputWord(), codesSize, frequencies, outWords);
if (DEBUG_DICT) {
float ns = queuePool->getMasterQueue()->getHighestNormalizedScore(
float ns = queuePool.getMasterQueue()->getHighestNormalizedScore(
masterCorrection.getPrimaryInputWord(), codesSize, 0, 0, 0);
ns += 0;
AKLOGI("Returning %d words", suggestedWordsCount);

4
native/jni/src/unigram_dictionary.h
View File

@ -77,8 +77,8 @@ class UnigramDictionary {
int fullWordMultiplier, int maxWordLength, int maxWords, const unsigned int flags);
int getFrequency(const int32_t* const inWord, const int length) const;
int getBigramPosition(int pos, unsigned short *word, int offset, int length) const;
int getSuggestions(ProximityInfo *proximityInfo, WordsPriorityQueuePool *queuePool,
const int *xcoordinates, const int *ycoordinates,
int getSuggestions(
ProximityInfo *proximityInfo, const int *xcoordinates, const int *ycoordinates,
const int *codes, const int codesSize, const std::map<int, int> *bigramMap,
const uint8_t *bigramFilter, const bool useFullEditDistance, unsigned short *outWords,
int *frequencies) const;