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Refactoring: Separate updating methods from writing methods. 

Bug: 11073222

Change-Id: I5e9df7276a8c167f31423bebf30bd26bde74fc92
main
Keisuke Kuroyanagi 2013-11-06 18:15:56 +09:00
parent 0be85cfdf7
commit 956ca35157
10 changed files with 396 additions and 299 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
native/jni/Android.mk
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@ -84,6 +84,7 @@ LATIN_IME_CORE_SRC_FILES := \
dynamic_patricia_trie_policy.cpp \
dynamic_patricia_trie_reading_helper.cpp \
dynamic_patricia_trie_reading_utils.cpp \
dynamic_patricia_trie_updating_helper.cpp \
dynamic_patricia_trie_writing_helper.cpp \
dynamic_patricia_trie_writing_utils.cpp) \
$(addprefix suggest/policyimpl/dictionary/structure/v4/, \

3
native/jni/src/suggest/policyimpl/dictionary/structure/pt_common/pt_node_writer.h
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@ -46,6 +46,9 @@ class PtNodeWriter {
const PtNodeParams *const targetPtNodeParam, const int probability,
bool *const outAddedNewBigram) = 0;
virtual bool removeBigramEntry(const PtNodeParams *const sourcePtNodeParams,
const PtNodeParams *const targetPtNodeParam) = 0;
protected:
PtNodeWriter() {};

9
native/jni/src/suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_node_writer.cpp
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@ -224,4 +224,13 @@ bool DynamicPatriciaTrieNodeWriter::addNewBigramEntry(
}
}
bool DynamicPatriciaTrieNodeWriter::removeBigramEntry(
const PtNodeParams *const sourcePtNodeParams, const PtNodeParams *const targetPtNodeParam) {
if (sourcePtNodeParams->getBigramsPos() == NOT_A_DICT_POS) {
return false;
}
return mBigramPolicy->removeBigram(sourcePtNodeParams->getBigramsPos(),
targetPtNodeParam->getHeadPos());
}
}

3
native/jni/src/suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_node_writer.h
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@ -63,6 +63,9 @@ class DynamicPatriciaTrieNodeWriter : public PtNodeWriter {
const PtNodeParams *const targetPtNodeParam, const int probability,
bool *const outAddedNewBigram);
virtual bool removeBigramEntry(const PtNodeParams *const sourcePtNodeParams,
const PtNodeParams *const targetPtNodeParam);
private:
DISALLOW_COPY_AND_ASSIGN(DynamicPatriciaTrieNodeWriter);

13
native/jni/src/suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_policy.cpp
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@ -27,6 +27,7 @@
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_node_reader.h"
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_reading_helper.h"
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_reading_utils.h"
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_updating_helper.h"
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_writing_helper.h"
#include "suggest/policyimpl/dictionary/utils/forgetting_curve_utils.h"
#include "suggest/policyimpl/dictionary/utils/probability_utils.h"
@ -152,10 +153,8 @@ bool DynamicPatriciaTriePolicy::addUnigramWord(const int *const word, const int
}
DynamicPatriciaTrieReadingHelper readingHelper(&mBufferWithExtendableBuffer, &mNodeReader);
readingHelper.initWithPtNodeArrayPos(getRootPosition());
DynamicPatriciaTrieWritingHelper writingHelper(&mBufferWithExtendableBuffer, &mNodeReader,
&mNodeWriter, &mBigramListPolicy, &mShortcutListPolicy, mHeaderPolicy.isDecayingDict());
bool addedNewUnigram = false;
if (writingHelper.addUnigramWord(&readingHelper, word, length, probability,
if (mUpdatingHelper.addUnigramWord(&readingHelper, word, length, probability,
&addedNewUnigram)) {
if (addedNewUnigram) {
mUnigramCount++;
@ -187,10 +186,8 @@ bool DynamicPatriciaTriePolicy::addBigramWords(const int *const word0, const int
if (word1Pos == NOT_A_DICT_POS) {
return false;
}
DynamicPatriciaTrieWritingHelper writingHelper(&mBufferWithExtendableBuffer, &mNodeReader,
&mNodeWriter, &mBigramListPolicy, &mShortcutListPolicy, mHeaderPolicy.isDecayingDict());
bool addedNewBigram = false;
if (writingHelper.addBigramWords(word0Pos, word1Pos, probability, &addedNewBigram)) {
if (mUpdatingHelper.addBigramWords(word0Pos, word1Pos, probability, &addedNewBigram)) {
if (addedNewBigram) {
mBigramCount++;
}
@ -221,9 +218,7 @@ bool DynamicPatriciaTriePolicy::removeBigramWords(const int *const word0, const
if (word1Pos == NOT_A_DICT_POS) {
return false;
}
DynamicPatriciaTrieWritingHelper writingHelper(&mBufferWithExtendableBuffer, &mNodeReader,
&mNodeWriter, &mBigramListPolicy, &mShortcutListPolicy, mHeaderPolicy.isDecayingDict());
if (writingHelper.removeBigramWords(word0Pos, word1Pos)) {
if (mUpdatingHelper.removeBigramWords(word0Pos, word1Pos)) {
mBigramCount--;
return true;
} else {

4
native/jni/src/suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_policy.h
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@ -24,6 +24,7 @@
#include "suggest/policyimpl/dictionary/shortcut/dynamic_shortcut_list_policy.h"
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_node_reader.h"
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_node_writer.h"
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_updating_helper.h"
#include "suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer.h"
#include "suggest/policyimpl/dictionary/utils/format_utils.h"
#include "suggest/policyimpl/dictionary/utils/mmapped_buffer.h"
@ -49,6 +50,8 @@ class DynamicPatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
mNodeReader(&mBufferWithExtendableBuffer, &mBigramListPolicy, &mShortcutListPolicy),
mNodeWriter(&mBufferWithExtendableBuffer, &mNodeReader, &mBigramListPolicy,
&mShortcutListPolicy),
mUpdatingHelper(&mBufferWithExtendableBuffer, &mNodeReader, &mNodeWriter,
mHeaderPolicy.isDecayingDict()),
mUnigramCount(mHeaderPolicy.getUnigramCount()),
mBigramCount(mHeaderPolicy.getBigramCount()), mNeedsToDecayForTesting(false) {}
@ -121,6 +124,7 @@ class DynamicPatriciaTriePolicy : public DictionaryStructureWithBufferPolicy {
DynamicBigramListPolicy mBigramListPolicy;
DynamicPatriciaTrieNodeReader mNodeReader;
DynamicPatriciaTrieNodeWriter mNodeWriter;
DynamicPatriciaTrieUpdatingHelper mUpdatingHelper;
int mUnigramCount;
int mBigramCount;
int mNeedsToDecayForTesting;

279
native/jni/src/suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_updating_helper.cpp Normal file
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@ -0,0 +1,279 @@
/*
* Copyright (C) 2013, 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.
*/
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_updating_helper.h"
#include "suggest/policyimpl/dictionary/structure/pt_common/pt_node_reader.h"
#include "suggest/policyimpl/dictionary/structure/pt_common/pt_node_writer.h"
#include "suggest/policyimpl/dictionary/structure/v2/patricia_trie_reading_utils.h"
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_reading_helper.h"
#include "suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_writing_utils.h"
#include "suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer.h"
#include "suggest/policyimpl/dictionary/utils/forgetting_curve_utils.h"
namespace latinime {
const int DynamicPatriciaTrieUpdatingHelper::CHILDREN_POSITION_FIELD_SIZE = 3;
bool DynamicPatriciaTrieUpdatingHelper::addUnigramWord(
DynamicPatriciaTrieReadingHelper *const readingHelper,
const int *const wordCodePoints, const int codePointCount, const int probability,
bool *const outAddedNewUnigram) {
int parentPos = NOT_A_DICT_POS;
while (!readingHelper->isEnd()) {
const PtNodeParams ptNodeParams(readingHelper->getPtNodeParams());
if (!ptNodeParams.isValid()) {
break;
}
const int matchedCodePointCount = readingHelper->getPrevTotalCodePointCount();
if (!readingHelper->isMatchedCodePoint(ptNodeParams, 0 /* index */,
wordCodePoints[matchedCodePointCount])) {
// The first code point is different from target code point. Skip this node and read
// the next sibling node.
readingHelper->readNextSiblingNode(ptNodeParams);
continue;
}
// Check following merged node code points.
const int nodeCodePointCount = ptNodeParams.getCodePointCount();
for (int j = 1; j < nodeCodePointCount; ++j) {
const int nextIndex = matchedCodePointCount + j;
if (nextIndex >= codePointCount || !readingHelper->isMatchedCodePoint(ptNodeParams, j,
wordCodePoints[matchedCodePointCount + j])) {
*outAddedNewUnigram = true;
return reallocatePtNodeAndAddNewPtNodes(&ptNodeParams, j,
getUpdatedProbability(NOT_A_PROBABILITY /* originalProbability */,
probability),
wordCodePoints + matchedCodePointCount,
codePointCount - matchedCodePointCount);
}
}
// All characters are matched.
if (codePointCount == readingHelper->getTotalCodePointCount(ptNodeParams)) {
return setPtNodeProbability(&ptNodeParams, probability, outAddedNewUnigram);
}
if (!ptNodeParams.hasChildren()) {
*outAddedNewUnigram = true;
return createChildrenPtNodeArrayAndAChildPtNode(&ptNodeParams,
getUpdatedProbability(NOT_A_PROBABILITY /* originalProbability */, probability),
wordCodePoints + readingHelper->getTotalCodePointCount(ptNodeParams),
codePointCount - readingHelper->getTotalCodePointCount(ptNodeParams));
}
// Advance to the children nodes.
parentPos = ptNodeParams.getHeadPos();
readingHelper->readChildNode(ptNodeParams);
}
if (readingHelper->isError()) {
// The dictionary is invalid.
return false;
}
int pos = readingHelper->getPosOfLastForwardLinkField();
*outAddedNewUnigram = true;
return createAndInsertNodeIntoPtNodeArray(parentPos,
wordCodePoints + readingHelper->getPrevTotalCodePointCount(),
codePointCount - readingHelper->getPrevTotalCodePointCount(),
getUpdatedProbability(NOT_A_PROBABILITY /* originalProbability */, probability), &pos);
}
bool DynamicPatriciaTrieUpdatingHelper::addBigramWords(const int word0Pos, const int word1Pos,
const int probability, bool *const outAddedNewBigram) {
const PtNodeParams sourcePtNodeParams(
mPtNodeReader->fetchNodeInfoInBufferFromPtNodePos(word0Pos));
const PtNodeParams targetPtNodeParams(
mPtNodeReader->fetchNodeInfoInBufferFromPtNodePos(word1Pos));
return mPtNodeWriter->addNewBigramEntry(&sourcePtNodeParams, &targetPtNodeParams, probability,
outAddedNewBigram);
}
// Remove a bigram relation from word0Pos to word1Pos.
bool DynamicPatriciaTrieUpdatingHelper::removeBigramWords(const int word0Pos, const int word1Pos) {
const PtNodeParams sourcePtNodeParams(
mPtNodeReader->fetchNodeInfoInBufferFromPtNodePos(word0Pos));
const PtNodeParams targetPtNodeParams(
mPtNodeReader->fetchNodeInfoInBufferFromPtNodePos(word1Pos));
return mPtNodeWriter->removeBigramEntry(&sourcePtNodeParams, &targetPtNodeParams);
}
bool DynamicPatriciaTrieUpdatingHelper::createAndInsertNodeIntoPtNodeArray(const int parentPos,
const int *const nodeCodePoints, const int nodeCodePointCount, const int probability,
int *const forwardLinkFieldPos) {
const int newPtNodeArrayPos = mBuffer->getTailPosition();
if (!DynamicPatriciaTrieWritingUtils::writeForwardLinkPositionAndAdvancePosition(mBuffer,
newPtNodeArrayPos, forwardLinkFieldPos)) {
return false;
}
return createNewPtNodeArrayWithAChildPtNode(parentPos, nodeCodePoints, nodeCodePointCount,
probability);
}
bool DynamicPatriciaTrieUpdatingHelper::setPtNodeProbability(
const PtNodeParams *const originalPtNodeParams, const int probability,
bool *const outAddedNewUnigram) {
if (originalPtNodeParams->isTerminal()) {
// Overwrites the probability.
*outAddedNewUnigram = false;
const int probabilityToWrite = getUpdatedProbability(
originalPtNodeParams->getProbability(), probability);
return mPtNodeWriter->updatePtNodeProbability(originalPtNodeParams, probabilityToWrite);
} else {
// Make the node terminal and write the probability.
*outAddedNewUnigram = true;
const int movedPos = mBuffer->getTailPosition();
int writingPos = movedPos;
const PtNodeParams ptNodeParamsToWrite(getUpdatedPtNodeParams(originalPtNodeParams,
originalPtNodeParams->getParentPos(), originalPtNodeParams->getCodePointCount(),
originalPtNodeParams->getCodePoints(),
getUpdatedProbability(NOT_A_PROBABILITY /* originalProbability */, probability)));
if (!mPtNodeWriter->writePtNodeAndAdvancePosition(&ptNodeParamsToWrite, &writingPos)) {
return false;
}
if (!mPtNodeWriter->markPtNodeAsMoved(originalPtNodeParams, movedPos, movedPos)) {
return false;
}
}
return true;
}
bool DynamicPatriciaTrieUpdatingHelper::createChildrenPtNodeArrayAndAChildPtNode(
const PtNodeParams *const parentPtNodeParams, const int probability,
const int *const codePoints, const int codePointCount) {
const int newPtNodeArrayPos = mBuffer->getTailPosition();
if (!mPtNodeWriter->updateChildrenPosition(parentPtNodeParams, newPtNodeArrayPos)) {
return false;
}
return createNewPtNodeArrayWithAChildPtNode(parentPtNodeParams->getHeadPos(), codePoints,
codePointCount, probability);
}
bool DynamicPatriciaTrieUpdatingHelper::createNewPtNodeArrayWithAChildPtNode(
const int parentPtNodePos, const int *const nodeCodePoints, const int nodeCodePointCount,
const int probability) {
int writingPos = mBuffer->getTailPosition();
if (!DynamicPatriciaTrieWritingUtils::writePtNodeArraySizeAndAdvancePosition(mBuffer,
1 /* arraySize */, &writingPos)) {
return false;
}
const PtNodeParams ptNodeParamsToWrite(getPtNodeParamsForNewPtNode(
parentPtNodePos, nodeCodePointCount, nodeCodePoints, probability));
if (!mPtNodeWriter->writePtNodeAndAdvancePosition(&ptNodeParamsToWrite, &writingPos)) {
return false;
}
if (!DynamicPatriciaTrieWritingUtils::writeForwardLinkPositionAndAdvancePosition(mBuffer,
NOT_A_DICT_POS /* forwardLinkPos */, &writingPos)) {
return false;
}
return true;
}
// Returns whether the dictionary updating was succeeded or not.
bool DynamicPatriciaTrieUpdatingHelper::reallocatePtNodeAndAddNewPtNodes(
const PtNodeParams *const reallocatingPtNodeParams, const int overlappingCodePointCount,
const int probabilityOfNewPtNode, const int *const newNodeCodePoints,
const int newNodeCodePointCount) {
// When addsExtraChild is true, split the reallocating PtNode and add new child.
// Reallocating PtNode: abcde, newNode: abcxy.
// abc (1st, not terminal) __ de (2nd)
// \_ xy (extra child, terminal)
// Otherwise, this method makes 1st part terminal and write probabilityOfNewPtNode.
// Reallocating PtNode: abcde, newNode: abc.
// abc (1st, terminal) __ de (2nd)
const bool addsExtraChild = newNodeCodePointCount > overlappingCodePointCount;
const int firstPartOfReallocatedPtNodePos = mBuffer->getTailPosition();
int writingPos = firstPartOfReallocatedPtNodePos;
// Write the 1st part of the reallocating node. The children position will be updated later
// with actual children position.
const int newProbability = addsExtraChild ? NOT_A_PROBABILITY : probabilityOfNewPtNode;
const PtNodeParams ptNodeParamsToWrite(getPtNodeParamsForNewPtNode(
reallocatingPtNodeParams->getParentPos(), overlappingCodePointCount,
reallocatingPtNodeParams->getCodePoints(), newProbability));
if (!mPtNodeWriter->writePtNodeAndAdvancePosition(&ptNodeParamsToWrite, &writingPos)) {
return false;
}
const int actualChildrenPos = writingPos;
// Create new children PtNode array.
const size_t newPtNodeCount = addsExtraChild ? 2 : 1;
if (!DynamicPatriciaTrieWritingUtils::writePtNodeArraySizeAndAdvancePosition(mBuffer,
newPtNodeCount, &writingPos)) {
return false;
}
// Write the 2nd part of the reallocating node.
const int secondPartOfReallocatedPtNodePos = writingPos;
const PtNodeParams childPartPtNodeParams(getUpdatedPtNodeParams(reallocatingPtNodeParams,
firstPartOfReallocatedPtNodePos,
reallocatingPtNodeParams->getCodePointCount() - overlappingCodePointCount,
reallocatingPtNodeParams->getCodePoints() + overlappingCodePointCount,
reallocatingPtNodeParams->getProbability()));
if (!mPtNodeWriter->writePtNodeAndAdvancePosition(&childPartPtNodeParams, &writingPos)) {
return false;
}
if (addsExtraChild) {
const PtNodeParams extraChildPtNodeParams(getPtNodeParamsForNewPtNode(
firstPartOfReallocatedPtNodePos, newNodeCodePointCount - overlappingCodePointCount,
newNodeCodePoints + overlappingCodePointCount, probabilityOfNewPtNode));
if (!mPtNodeWriter->writePtNodeAndAdvancePosition(&extraChildPtNodeParams, &writingPos)) {
return false;
}
}
if (!DynamicPatriciaTrieWritingUtils::writeForwardLinkPositionAndAdvancePosition(mBuffer,
NOT_A_DICT_POS /* forwardLinkPos */, &writingPos)) {
return false;
}
// Update original reallocating PtNode as moved.
if (!mPtNodeWriter->markPtNodeAsMoved(reallocatingPtNodeParams, firstPartOfReallocatedPtNodePos,
secondPartOfReallocatedPtNodePos)) {
return false;
}
// Load node info. Information of the 1st part will be fetched.
const PtNodeParams ptNodeParams(
mPtNodeReader->fetchNodeInfoInBufferFromPtNodePos(firstPartOfReallocatedPtNodePos));
// Update children position.
return mPtNodeWriter->updateChildrenPosition(&ptNodeParams, actualChildrenPos);
}
int DynamicPatriciaTrieUpdatingHelper::getUpdatedProbability(const int originalProbability,
const int newProbability) const {
if (mNeedsToDecay) {
return ForgettingCurveUtils::getUpdatedEncodedProbability(originalProbability,
newProbability);
} else {
return newProbability;
}
}
const PtNodeParams DynamicPatriciaTrieUpdatingHelper::getUpdatedPtNodeParams(
const PtNodeParams *const originalPtNodeParams, const int parentPos,
const int codePointCount, const int *const codePoints, const int probability) const {
const PatriciaTrieReadingUtils::NodeFlags flags = PatriciaTrieReadingUtils::createAndGetFlags(
originalPtNodeParams->isBlacklisted(), originalPtNodeParams->isNotAWord(),
probability != NOT_A_PROBABILITY /* isTerminal */,
originalPtNodeParams->getShortcutPos() != NOT_A_DICT_POS /* hasShortcutTargets */,
originalPtNodeParams->getBigramsPos() != NOT_A_DICT_POS /* hasBigrams */,
codePointCount > 1 /* hasMultipleChars */, CHILDREN_POSITION_FIELD_SIZE);
return PtNodeParams(originalPtNodeParams, flags, parentPos, codePointCount, codePoints,
probability);
}
const PtNodeParams DynamicPatriciaTrieUpdatingHelper::getPtNodeParamsForNewPtNode(
const int parentPos, const int codePointCount, const int *const codePoints,
const int probability) const {
const PatriciaTrieReadingUtils::NodeFlags flags = PatriciaTrieReadingUtils::createAndGetFlags(
false /* isBlacklisted */, false /* isNotAWord */,
probability != NOT_A_PROBABILITY /* isTerminal */,
false /* hasShortcutTargets */, false /* hasBigrams */,
codePointCount > 1 /* hasMultipleChars */, CHILDREN_POSITION_FIELD_SIZE);
return PtNodeParams(flags, parentPos, codePointCount, codePoints, probability);
}
} // namespace latinime

93
native/jni/src/suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_updating_helper.h Normal file
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@ -0,0 +1,93 @@
/*
* Copyright (C) 2013, 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_DYNAMIC_PATRICIA_TRIE_UPDATING_HELPER_H
#define LATINIME_DYNAMIC_PATRICIA_TRIE_UPDATING_HELPER_H
#include <stdint.h>
#include "defines.h"
#include "suggest/policyimpl/dictionary/structure/pt_common/pt_node_params.h"
#include "utils/hash_map_compat.h"
namespace latinime {
class BufferWithExtendableBuffer;
class DynamicPatriciaTrieReadingHelper;
class PtNodeReader;
class PtNodeWriter;
// TODO: Move to pt_common.
class DynamicPatriciaTrieUpdatingHelper {
public:
DynamicPatriciaTrieUpdatingHelper(BufferWithExtendableBuffer *const buffer,
const PtNodeReader *const ptNodeReader, PtNodeWriter *const ptNodeWriter,
const bool needsToDecay)
: mBuffer(buffer), mPtNodeReader(ptNodeReader), mPtNodeWriter(ptNodeWriter),
mNeedsToDecay(needsToDecay) {}
~DynamicPatriciaTrieUpdatingHelper() {}
// Add a word to the dictionary. If the word already exists, update the probability.
bool addUnigramWord(DynamicPatriciaTrieReadingHelper *const readingHelper,
const int *const wordCodePoints, const int codePointCount, const int probability,
bool *const outAddedNewUnigram);
// Add a bigram relation from word0Pos to word1Pos.
bool addBigramWords(const int word0Pos, const int word1Pos, const int probability,
bool *const outAddedNewBigram);
// Remove a bigram relation from word0Pos to word1Pos.
bool removeBigramWords(const int word0Pos, const int word1Pos);
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(DynamicPatriciaTrieUpdatingHelper);
static const int CHILDREN_POSITION_FIELD_SIZE;
BufferWithExtendableBuffer *const mBuffer;
const PtNodeReader *const mPtNodeReader;
PtNodeWriter *const mPtNodeWriter;
const bool mNeedsToDecay;
bool createAndInsertNodeIntoPtNodeArray(const int parentPos, const int *const nodeCodePoints,
const int nodeCodePointCount, const int probability, int *const forwardLinkFieldPos);
bool setPtNodeProbability(const PtNodeParams *const originalPtNodeParams, const int probability,
bool *const outAddedNewUnigram);
bool createChildrenPtNodeArrayAndAChildPtNode(const PtNodeParams *const parentPtNodeParams,
const int probability, const int *const codePoints, const int codePointCount);
bool createNewPtNodeArrayWithAChildPtNode(const int parentPos, const int *const nodeCodePoints,
const int nodeCodePointCount, const int probability);
bool reallocatePtNodeAndAddNewPtNodes(
const PtNodeParams *const reallocatingPtNodeParams, const int overlappingCodePointCount,
const int probabilityOfNewPtNode, const int *const newNodeCodePoints,
const int newNodeCodePointCount);
int getUpdatedProbability(const int originalProbability, const int newProbability) const;
const PtNodeParams getUpdatedPtNodeParams(const PtNodeParams *const originalPtNodeParams,
const int parentPos, const int codePointCount, const int *const codePoints,
const int probability) const;
const PtNodeParams getPtNodeParamsForNewPtNode(const int parentPos, const int codePointCount,
const int *const codePoints, const int probability) const;
};
} // namespace latinime
#endif /* LATINIME_DYNAMIC_PATRICIA_TRIE_UPDATING_HELPER_H */

249
native/jni/src/suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_writing_helper.cpp
View File

@ -34,88 +34,9 @@
namespace latinime {
const int DynamicPatriciaTrieWritingHelper::CHILDREN_POSITION_FIELD_SIZE = 3;
// TODO: Make MAX_DICTIONARY_SIZE 8MB.
const size_t DynamicPatriciaTrieWritingHelper::MAX_DICTIONARY_SIZE = 2 * 1024 * 1024;
bool DynamicPatriciaTrieWritingHelper::addUnigramWord(
DynamicPatriciaTrieReadingHelper *const readingHelper,
const int *const wordCodePoints, const int codePointCount, const int probability,
bool *const outAddedNewUnigram) {
int parentPos = NOT_A_DICT_POS;
while (!readingHelper->isEnd()) {
const PtNodeParams ptNodeParams(readingHelper->getPtNodeParams());
if (!ptNodeParams.isValid()) {
break;
}
const int matchedCodePointCount = readingHelper->getPrevTotalCodePointCount();
if (!readingHelper->isMatchedCodePoint(ptNodeParams, 0 /* index */,
wordCodePoints[matchedCodePointCount])) {
// The first code point is different from target code point. Skip this node and read
// the next sibling node.
readingHelper->readNextSiblingNode(ptNodeParams);
continue;
}
// Check following merged node code points.
const int nodeCodePointCount = ptNodeParams.getCodePointCount();
for (int j = 1; j < nodeCodePointCount; ++j) {
const int nextIndex = matchedCodePointCount + j;
if (nextIndex >= codePointCount || !readingHelper->isMatchedCodePoint(ptNodeParams, j,
wordCodePoints[matchedCodePointCount + j])) {
*outAddedNewUnigram = true;
return reallocatePtNodeAndAddNewPtNodes(&ptNodeParams, j,
getUpdatedProbability(NOT_A_PROBABILITY /* originalProbability */,
probability),
wordCodePoints + matchedCodePointCount,
codePointCount - matchedCodePointCount);
}
}
// All characters are matched.
if (codePointCount == readingHelper->getTotalCodePointCount(ptNodeParams)) {
return setPtNodeProbability(&ptNodeParams, probability, outAddedNewUnigram);
}
if (!ptNodeParams.hasChildren()) {
*outAddedNewUnigram = true;
return createChildrenPtNodeArrayAndAChildPtNode(&ptNodeParams,
getUpdatedProbability(NOT_A_PROBABILITY /* originalProbability */, probability),
wordCodePoints + readingHelper->getTotalCodePointCount(ptNodeParams),
codePointCount - readingHelper->getTotalCodePointCount(ptNodeParams));
}
// Advance to the children nodes.
parentPos = ptNodeParams.getHeadPos();
readingHelper->readChildNode(ptNodeParams);
}
if (readingHelper->isError()) {
// The dictionary is invalid.
return false;
}
int pos = readingHelper->getPosOfLastForwardLinkField();
*outAddedNewUnigram = true;
return createAndInsertNodeIntoPtNodeArray(parentPos,
wordCodePoints + readingHelper->getPrevTotalCodePointCount(),
codePointCount - readingHelper->getPrevTotalCodePointCount(),
getUpdatedProbability(NOT_A_PROBABILITY /* originalProbability */, probability), &pos);
}
bool DynamicPatriciaTrieWritingHelper::addBigramWords(const int word0Pos, const int word1Pos,
const int probability, bool *const outAddedNewBigram) {
const PtNodeParams sourcePtNodeParams(
mPtNodeReader->fetchNodeInfoInBufferFromPtNodePos(word0Pos));
const PtNodeParams targetPtNodeParams(
mPtNodeReader->fetchNodeInfoInBufferFromPtNodePos(word1Pos));
return mPtNodeWriter->addNewBigramEntry(&sourcePtNodeParams, &targetPtNodeParams, probability,
outAddedNewBigram);
}
// Remove a bigram relation from word0Pos to word1Pos.
bool DynamicPatriciaTrieWritingHelper::removeBigramWords(const int word0Pos, const int word1Pos) {
const PtNodeParams ptNodeParams(mPtNodeReader->fetchNodeInfoInBufferFromPtNodePos(word0Pos));
if (ptNodeParams.getBigramsPos() == NOT_A_DICT_POS) {
return false;
}
return mBigramPolicy->removeBigram(ptNodeParams.getBigramsPos(), word1Pos);
}
void DynamicPatriciaTrieWritingHelper::writeToDictFile(const char *const fileName,
const HeaderPolicy *const headerPolicy, const int unigramCount, const int bigramCount) {
BufferWithExtendableBuffer headerBuffer(
@ -149,142 +70,6 @@ void DynamicPatriciaTrieWritingHelper::writeToDictFileWithGC(const int rootPtNod
DictFileWritingUtils::flushAllHeaderAndBodyToFile(fileName, &headerBuffer, &newDictBuffer);
}
bool DynamicPatriciaTrieWritingHelper::createAndInsertNodeIntoPtNodeArray(const int parentPos,
const int *const nodeCodePoints, const int nodeCodePointCount, const int probability,
int *const forwardLinkFieldPos) {
const int newPtNodeArrayPos = mBuffer->getTailPosition();
if (!DynamicPatriciaTrieWritingUtils::writeForwardLinkPositionAndAdvancePosition(mBuffer,
newPtNodeArrayPos, forwardLinkFieldPos)) {
return false;
}
return createNewPtNodeArrayWithAChildPtNode(parentPos, nodeCodePoints, nodeCodePointCount,
probability);
}
bool DynamicPatriciaTrieWritingHelper::setPtNodeProbability(
const PtNodeParams *const originalPtNodeParams, const int probability,
bool *const outAddedNewUnigram) {
if (originalPtNodeParams->isTerminal()) {
// Overwrites the probability.
*outAddedNewUnigram = false;
const int probabilityToWrite = getUpdatedProbability(
originalPtNodeParams->getProbability(), probability);
return mPtNodeWriter->updatePtNodeProbability(originalPtNodeParams, probabilityToWrite);
} else {
// Make the node terminal and write the probability.
*outAddedNewUnigram = true;
const int movedPos = mBuffer->getTailPosition();
int writingPos = movedPos;
const PtNodeParams ptNodeParamsToWrite(getUpdatedPtNodeParams(originalPtNodeParams,
originalPtNodeParams->getParentPos(), originalPtNodeParams->getCodePointCount(),
originalPtNodeParams->getCodePoints(),
getUpdatedProbability(NOT_A_PROBABILITY /* originalProbability */, probability)));
if (!mPtNodeWriter->writePtNodeAndAdvancePosition(&ptNodeParamsToWrite, &writingPos)) {
return false;
}
if (!mPtNodeWriter->markPtNodeAsMoved(originalPtNodeParams, movedPos, movedPos)) {
return false;
}
}
return true;
}
bool DynamicPatriciaTrieWritingHelper::createChildrenPtNodeArrayAndAChildPtNode(
const PtNodeParams *const parentPtNodeParams, const int probability,
const int *const codePoints, const int codePointCount) {
const int newPtNodeArrayPos = mBuffer->getTailPosition();
if (!mPtNodeWriter->updateChildrenPosition(parentPtNodeParams, newPtNodeArrayPos)) {
return false;
}
return createNewPtNodeArrayWithAChildPtNode(parentPtNodeParams->getHeadPos(), codePoints,
codePointCount, probability);
}
bool DynamicPatriciaTrieWritingHelper::createNewPtNodeArrayWithAChildPtNode(
const int parentPtNodePos, const int *const nodeCodePoints, const int nodeCodePointCount,
const int probability) {
int writingPos = mBuffer->getTailPosition();
if (!DynamicPatriciaTrieWritingUtils::writePtNodeArraySizeAndAdvancePosition(mBuffer,
1 /* arraySize */, &writingPos)) {
return false;
}
const PtNodeParams ptNodeParamsToWrite(getPtNodeParamsForNewPtNode(
parentPtNodePos, nodeCodePointCount, nodeCodePoints, probability));
if (!mPtNodeWriter->writePtNodeAndAdvancePosition(&ptNodeParamsToWrite, &writingPos)) {
return false;
}
if (!DynamicPatriciaTrieWritingUtils::writeForwardLinkPositionAndAdvancePosition(mBuffer,
NOT_A_DICT_POS /* forwardLinkPos */, &writingPos)) {
return false;
}
return true;
}
// Returns whether the dictionary updating was succeeded or not.
bool DynamicPatriciaTrieWritingHelper::reallocatePtNodeAndAddNewPtNodes(
const PtNodeParams *const reallocatingPtNodeParams, const int overlappingCodePointCount,
const int probabilityOfNewPtNode, const int *const newNodeCodePoints,
const int newNodeCodePointCount) {
// When addsExtraChild is true, split the reallocating PtNode and add new child.
// Reallocating PtNode: abcde, newNode: abcxy.
// abc (1st, not terminal) __ de (2nd)
// \_ xy (extra child, terminal)
// Otherwise, this method makes 1st part terminal and write probabilityOfNewPtNode.
// Reallocating PtNode: abcde, newNode: abc.
// abc (1st, terminal) __ de (2nd)
const bool addsExtraChild = newNodeCodePointCount > overlappingCodePointCount;
const int firstPartOfReallocatedPtNodePos = mBuffer->getTailPosition();
int writingPos = firstPartOfReallocatedPtNodePos;
// Write the 1st part of the reallocating node. The children position will be updated later
// with actual children position.
const int newProbability = addsExtraChild ? NOT_A_PROBABILITY : probabilityOfNewPtNode;
const PtNodeParams ptNodeParamsToWrite(getPtNodeParamsForNewPtNode(
reallocatingPtNodeParams->getParentPos(), overlappingCodePointCount,
reallocatingPtNodeParams->getCodePoints(), newProbability));
if (!mPtNodeWriter->writePtNodeAndAdvancePosition(&ptNodeParamsToWrite, &writingPos)) {
return false;
}
const int actualChildrenPos = writingPos;
// Create new children PtNode array.
const size_t newPtNodeCount = addsExtraChild ? 2 : 1;
if (!DynamicPatriciaTrieWritingUtils::writePtNodeArraySizeAndAdvancePosition(mBuffer,
newPtNodeCount, &writingPos)) {
return false;
}
// Write the 2nd part of the reallocating node.
const int secondPartOfReallocatedPtNodePos = writingPos;
const PtNodeParams childPartPtNodeParams(getUpdatedPtNodeParams(reallocatingPtNodeParams,
firstPartOfReallocatedPtNodePos,
reallocatingPtNodeParams->getCodePointCount() - overlappingCodePointCount,
reallocatingPtNodeParams->getCodePoints() + overlappingCodePointCount,
reallocatingPtNodeParams->getProbability()));
if (!mPtNodeWriter->writePtNodeAndAdvancePosition(&childPartPtNodeParams, &writingPos)) {
return false;
}
if (addsExtraChild) {
const PtNodeParams extraChildPtNodeParams(getPtNodeParamsForNewPtNode(
firstPartOfReallocatedPtNodePos, newNodeCodePointCount - overlappingCodePointCount,
newNodeCodePoints + overlappingCodePointCount, probabilityOfNewPtNode));
if (!mPtNodeWriter->writePtNodeAndAdvancePosition(&extraChildPtNodeParams, &writingPos)) {
return false;
}
}
if (!DynamicPatriciaTrieWritingUtils::writeForwardLinkPositionAndAdvancePosition(mBuffer,
NOT_A_DICT_POS /* forwardLinkPos */, &writingPos)) {
return false;
}
// Update original reallocating PtNode as moved.
if (!mPtNodeWriter->markPtNodeAsMoved(reallocatingPtNodeParams, firstPartOfReallocatedPtNodePos,
secondPartOfReallocatedPtNodePos)) {
return false;
}
// Load node info. Information of the 1st part will be fetched.
const PtNodeParams ptNodeParams(
mPtNodeReader->fetchNodeInfoInBufferFromPtNodePos(firstPartOfReallocatedPtNodePos));
// Update children position.
return mPtNodeWriter->updateChildrenPosition(&ptNodeParams, actualChildrenPos);
}
// TODO: Make this method version independent.
bool DynamicPatriciaTrieWritingHelper::runGC(const int rootPtNodeArrayPos,
const HeaderPolicy *const headerPolicy, BufferWithExtendableBuffer *const bufferToWrite,
@ -351,38 +136,4 @@ bool DynamicPatriciaTrieWritingHelper::runGC(const int rootPtNodeArrayPos,
return true;
}
int DynamicPatriciaTrieWritingHelper::getUpdatedProbability(const int originalProbability,
const int newProbability) const {
if (mNeedsToDecay) {
return ForgettingCurveUtils::getUpdatedEncodedProbability(originalProbability,
newProbability);
} else {
return newProbability;
}
}
const PtNodeParams DynamicPatriciaTrieWritingHelper::getUpdatedPtNodeParams(
const PtNodeParams *const originalPtNodeParams, const int parentPos,
const int codePointCount, const int *const codePoints, const int probability) const {
const PatriciaTrieReadingUtils::NodeFlags flags = PatriciaTrieReadingUtils::createAndGetFlags(
originalPtNodeParams->isBlacklisted(), originalPtNodeParams->isNotAWord(),
probability != NOT_A_PROBABILITY /* isTerminal */,
originalPtNodeParams->getShortcutPos() != NOT_A_DICT_POS /* hasShortcutTargets */,
originalPtNodeParams->getBigramsPos() != NOT_A_DICT_POS /* hasBigrams */,
codePointCount > 1 /* hasMultipleChars */, CHILDREN_POSITION_FIELD_SIZE);
return PtNodeParams(originalPtNodeParams, flags, parentPos, codePointCount, codePoints,
probability);
}
const PtNodeParams DynamicPatriciaTrieWritingHelper::getPtNodeParamsForNewPtNode(
const int parentPos, const int codePointCount, const int *const codePoints,
const int probability) const {
const PatriciaTrieReadingUtils::NodeFlags flags = PatriciaTrieReadingUtils::createAndGetFlags(
false /* isBlacklisted */, false /* isNotAWord */,
probability != NOT_A_PROBABILITY /* isTerminal */,
false /* hasShortcutTargets */, false /* hasBigrams */,
codePointCount > 1 /* hasMultipleChars */, CHILDREN_POSITION_FIELD_SIZE);
return PtNodeParams(flags, parentPos, codePointCount, codePoints, probability);
}
} // namespace latinime

41
native/jni/src/suggest/policyimpl/dictionary/structure/v3/dynamic_patricia_trie_writing_helper.h
View File

@ -20,7 +20,6 @@
#include <stdint.h>
#include "defines.h"
#include "suggest/policyimpl/dictionary/structure/pt_common/pt_node_params.h"
#include "utils/hash_map_compat.h"
namespace latinime {
@ -62,18 +61,6 @@ class DynamicPatriciaTrieWritingHelper {
~DynamicPatriciaTrieWritingHelper() {}
// Add a word to the dictionary. If the word already exists, update the probability.
bool addUnigramWord(DynamicPatriciaTrieReadingHelper *const readingHelper,
const int *const wordCodePoints, const int codePointCount, const int probability,
bool *const outAddedNewUnigram);
// Add a bigram relation from word0Pos to word1Pos.
bool addBigramWords(const int word0Pos, const int word1Pos, const int probability,
bool *const outAddedNewBigram);
// Remove a bigram relation from word0Pos to word1Pos.
bool removeBigramWords(const int word0Pos, const int word1Pos);
void writeToDictFile(const char *const fileName, const HeaderPolicy *const headerPolicy,
const int unigramCount, const int bigramCount);
@ -83,8 +70,6 @@ class DynamicPatriciaTrieWritingHelper {
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(DynamicPatriciaTrieWritingHelper);
static const int CHILDREN_POSITION_FIELD_SIZE;
BufferWithExtendableBuffer *const mBuffer;
const PtNodeReader *const mPtNodeReader;
PtNodeWriter *const mPtNodeWriter;
@ -92,35 +77,9 @@ class DynamicPatriciaTrieWritingHelper {
DynamicShortcutListPolicy *const mShortcutPolicy;
const bool mNeedsToDecay;
bool createAndInsertNodeIntoPtNodeArray(const int parentPos, const int *const nodeCodePoints,
const int nodeCodePointCount, const int probability, int *const forwardLinkFieldPos);
bool setPtNodeProbability(const PtNodeParams *const originalPtNodeParams, const int probability,
bool *const outAddedNewUnigram);
bool createChildrenPtNodeArrayAndAChildPtNode(const PtNodeParams *const parentPtNodeParams,
const int probability, const int *const codePoints, const int codePointCount);
bool createNewPtNodeArrayWithAChildPtNode(const int parentPos, const int *const nodeCodePoints,
const int nodeCodePointCount, const int probability);
bool reallocatePtNodeAndAddNewPtNodes(
const PtNodeParams *const reallocatingPtNodeParams, const int overlappingCodePointCount,
const int probabilityOfNewPtNode, const int *const newNodeCodePoints,
const int newNodeCodePointCount);
bool runGC(const int rootPtNodeArrayPos, const HeaderPolicy *const headerPolicy,
BufferWithExtendableBuffer *const bufferToWrite, int *const outUnigramCount,
int *const outBigramCount);
int getUpdatedProbability(const int originalProbability, const int newProbability) const;
const PtNodeParams getUpdatedPtNodeParams(const PtNodeParams *const originalPtNodeParams,
const int parentPos, const int codePointCount, const int *const codePoints,
const int probability) const;
const PtNodeParams getPtNodeParamsForNewPtNode(const int parentPos, const int codePointCount,
const int *const codePoints, const int probability) const;
};
} // namespace latinime
#endif /* LATINIME_DYNAMIC_PATRICIA_TRIE_WRITING_HELPER_H */