269 lines
12 KiB
C++
269 lines
12 KiB
C++
/*
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* Copyright (C) 2013, 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_HEADER_POLICY_H
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#define LATINIME_HEADER_POLICY_H
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#include <cstdint>
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#include "defines.h"
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#include "dictionary/header/header_read_write_utils.h"
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#include "dictionary/interface/dictionary_header_structure_policy.h"
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#include "dictionary/utils/entry_counters.h"
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#include "dictionary/utils/format_utils.h"
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#include "utils/char_utils.h"
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#include "utils/time_keeper.h"
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namespace latinime {
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class HeaderPolicy : public DictionaryHeaderStructurePolicy {
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public:
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// Reads information from existing dictionary buffer.
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HeaderPolicy(const uint8_t *const dictBuf, const FormatUtils::FORMAT_VERSION formatVersion)
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: mDictFormatVersion(formatVersion),
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mDictionaryFlags(HeaderReadWriteUtils::getFlags(dictBuf)),
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mSize(HeaderReadWriteUtils::getHeaderSize(dictBuf)),
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mAttributeMap(createAttributeMapAndReadAllAttributes(dictBuf)),
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mLocale(readLocale()),
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mMultiWordCostMultiplier(readMultipleWordCostMultiplier()),
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mRequiresGermanUmlautProcessing(readRequiresGermanUmlautProcessing()),
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mIsDecayingDict(HeaderReadWriteUtils::readBoolAttributeValue(&mAttributeMap,
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IS_DECAYING_DICT_KEY, false /* defaultValue */)),
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mDate(HeaderReadWriteUtils::readIntAttributeValue(&mAttributeMap,
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DATE_KEY, TimeKeeper::peekCurrentTime() /* defaultValue */)),
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mLastDecayedTime(HeaderReadWriteUtils::readIntAttributeValue(&mAttributeMap,
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LAST_DECAYED_TIME_KEY, TimeKeeper::peekCurrentTime() /* defaultValue */)),
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mNgramCounts(readNgramCounts()), mMaxNgramCounts(readMaxNgramCounts()),
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mExtendedRegionSize(HeaderReadWriteUtils::readIntAttributeValue(&mAttributeMap,
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EXTENDED_REGION_SIZE_KEY, 0 /* defaultValue */)),
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mHasHistoricalInfoOfWords(HeaderReadWriteUtils::readBoolAttributeValue(
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&mAttributeMap, HAS_HISTORICAL_INFO_KEY, false /* defaultValue */)),
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mForgettingCurveProbabilityValuesTableId(HeaderReadWriteUtils::readIntAttributeValue(
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&mAttributeMap, FORGETTING_CURVE_PROBABILITY_VALUES_TABLE_ID_KEY,
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DEFAULT_FORGETTING_CURVE_PROBABILITY_VALUES_TABLE_ID)),
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mCodePointTable(HeaderReadWriteUtils::readCodePointTable(&mAttributeMap)) {}
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// Constructs header information using an attribute map.
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HeaderPolicy(const FormatUtils::FORMAT_VERSION dictFormatVersion,
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const std::vector<int> &locale,
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const DictionaryHeaderStructurePolicy::AttributeMap *const attributeMap)
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: mDictFormatVersion(dictFormatVersion),
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mDictionaryFlags(HeaderReadWriteUtils::createAndGetDictionaryFlagsUsingAttributeMap(
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attributeMap)), mSize(0), mAttributeMap(*attributeMap), mLocale(locale),
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mMultiWordCostMultiplier(readMultipleWordCostMultiplier()),
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mRequiresGermanUmlautProcessing(readRequiresGermanUmlautProcessing()),
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mIsDecayingDict(HeaderReadWriteUtils::readBoolAttributeValue(&mAttributeMap,
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IS_DECAYING_DICT_KEY, false /* defaultValue */)),
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mDate(HeaderReadWriteUtils::readIntAttributeValue(&mAttributeMap,
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DATE_KEY, TimeKeeper::peekCurrentTime() /* defaultValue */)),
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mLastDecayedTime(HeaderReadWriteUtils::readIntAttributeValue(&mAttributeMap,
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DATE_KEY, TimeKeeper::peekCurrentTime() /* defaultValue */)),
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mNgramCounts(readNgramCounts()), mMaxNgramCounts(readMaxNgramCounts()),
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mExtendedRegionSize(0),
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mHasHistoricalInfoOfWords(HeaderReadWriteUtils::readBoolAttributeValue(
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&mAttributeMap, HAS_HISTORICAL_INFO_KEY, false /* defaultValue */)),
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mForgettingCurveProbabilityValuesTableId(HeaderReadWriteUtils::readIntAttributeValue(
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&mAttributeMap, FORGETTING_CURVE_PROBABILITY_VALUES_TABLE_ID_KEY,
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DEFAULT_FORGETTING_CURVE_PROBABILITY_VALUES_TABLE_ID)),
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mCodePointTable(HeaderReadWriteUtils::readCodePointTable(&mAttributeMap)) {}
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// Copy header information
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HeaderPolicy(const HeaderPolicy *const headerPolicy)
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: mDictFormatVersion(headerPolicy->mDictFormatVersion),
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mDictionaryFlags(headerPolicy->mDictionaryFlags), mSize(headerPolicy->mSize),
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mAttributeMap(headerPolicy->mAttributeMap), mLocale(headerPolicy->mLocale),
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mMultiWordCostMultiplier(headerPolicy->mMultiWordCostMultiplier),
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mRequiresGermanUmlautProcessing(headerPolicy->mRequiresGermanUmlautProcessing),
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mIsDecayingDict(headerPolicy->mIsDecayingDict),
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mDate(headerPolicy->mDate), mLastDecayedTime(headerPolicy->mLastDecayedTime),
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mNgramCounts(headerPolicy->mNgramCounts),
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mMaxNgramCounts(headerPolicy->mMaxNgramCounts),
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mExtendedRegionSize(headerPolicy->mExtendedRegionSize),
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mHasHistoricalInfoOfWords(headerPolicy->mHasHistoricalInfoOfWords),
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mForgettingCurveProbabilityValuesTableId(
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headerPolicy->mForgettingCurveProbabilityValuesTableId),
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mCodePointTable(headerPolicy->mCodePointTable) {}
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// Temporary dummy header.
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HeaderPolicy()
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: mDictFormatVersion(FormatUtils::UNKNOWN_VERSION), mDictionaryFlags(0), mSize(0),
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mAttributeMap(), mLocale(CharUtils::EMPTY_STRING), mMultiWordCostMultiplier(0.0f),
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mRequiresGermanUmlautProcessing(false), mIsDecayingDict(false),
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mDate(0), mLastDecayedTime(0), mNgramCounts(), mMaxNgramCounts(),
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mExtendedRegionSize(0), mHasHistoricalInfoOfWords(false),
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mForgettingCurveProbabilityValuesTableId(0), mCodePointTable(nullptr) {}
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~HeaderPolicy() {}
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virtual int getFormatVersionNumber() const {
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// Conceptually this converts the symbolic value we use in the code into the
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// hardcoded of the bytes in the file. But we want the constants to be the
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// same so we use them for both here.
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switch (mDictFormatVersion) {
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case FormatUtils::VERSION_2:
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case FormatUtils::VERSION_201:
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AKLOGE("Dictionary versions 2 and 201 are incompatible with this version");
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return FormatUtils::UNKNOWN_VERSION;
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case FormatUtils::VERSION_202:
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return FormatUtils::VERSION_202;
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case FormatUtils::VERSION_4_ONLY_FOR_TESTING:
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return FormatUtils::VERSION_4_ONLY_FOR_TESTING;
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case FormatUtils::VERSION_402:
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return FormatUtils::VERSION_402;
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case FormatUtils::VERSION_403:
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return FormatUtils::VERSION_403;
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default:
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return FormatUtils::UNKNOWN_VERSION;
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}
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}
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AK_FORCE_INLINE bool isValid() const {
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// Decaying dictionary must have historical information.
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if (!mIsDecayingDict) {
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return true;
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}
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if (mHasHistoricalInfoOfWords) {
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return true;
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} else {
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return false;
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}
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}
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AK_FORCE_INLINE int getSize() const {
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return mSize;
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}
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AK_FORCE_INLINE float getMultiWordCostMultiplier() const {
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return mMultiWordCostMultiplier;
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}
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AK_FORCE_INLINE bool isDecayingDict() const {
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return mIsDecayingDict;
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}
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AK_FORCE_INLINE bool requiresGermanUmlautProcessing() const {
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return mRequiresGermanUmlautProcessing;
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}
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AK_FORCE_INLINE int getDate() const {
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return mDate;
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}
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AK_FORCE_INLINE int getLastDecayedTime() const {
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return mLastDecayedTime;
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}
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AK_FORCE_INLINE const EntryCounts &getNgramCounts() const {
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return mNgramCounts;
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}
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AK_FORCE_INLINE const EntryCounts getMaxNgramCounts() const {
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return mMaxNgramCounts;
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}
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AK_FORCE_INLINE int getExtendedRegionSize() const {
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return mExtendedRegionSize;
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}
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AK_FORCE_INLINE bool hasHistoricalInfoOfWords() const {
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return mHasHistoricalInfoOfWords;
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}
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AK_FORCE_INLINE bool shouldBoostExactMatches() const {
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// TODO: Investigate better ways to handle exact matches for personalized dictionaries.
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return !isDecayingDict();
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}
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const DictionaryHeaderStructurePolicy::AttributeMap *getAttributeMap() const {
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return &mAttributeMap;
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}
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AK_FORCE_INLINE int getForgettingCurveProbabilityValuesTableId() const {
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return mForgettingCurveProbabilityValuesTableId;
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}
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void readHeaderValueOrQuestionMark(const char *const key,
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int *outValue, int outValueSize) const;
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bool fillInAndWriteHeaderToBuffer(const bool updatesLastDecayedTime,
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const EntryCounts &entryCounts, const int extendedRegionSize,
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BufferWithExtendableBuffer *const outBuffer) const;
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void fillInHeader(const bool updatesLastDecayedTime, const EntryCounts &entryCounts,
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const int extendedRegionSize,
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DictionaryHeaderStructurePolicy::AttributeMap *outAttributeMap) const;
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AK_FORCE_INLINE const std::vector<int> *getLocale() const {
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return &mLocale;
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}
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bool supportsBeginningOfSentence() const {
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return mDictFormatVersion >= FormatUtils::VERSION_402;
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}
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const int *getCodePointTable() const {
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return mCodePointTable;
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}
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private:
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DISALLOW_COPY_AND_ASSIGN(HeaderPolicy);
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static const char *const MULTIPLE_WORDS_DEMOTION_RATE_KEY;
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static const char *const REQUIRES_GERMAN_UMLAUT_PROCESSING_KEY;
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static const char *const IS_DECAYING_DICT_KEY;
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static const char *const DATE_KEY;
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static const char *const LAST_DECAYED_TIME_KEY;
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static const char *const NGRAM_COUNT_KEYS[];
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static const char *const MAX_NGRAM_COUNT_KEYS[];
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static const int DEFAULT_MAX_NGRAM_COUNTS[];
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static const char *const EXTENDED_REGION_SIZE_KEY;
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static const char *const HAS_HISTORICAL_INFO_KEY;
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static const char *const LOCALE_KEY;
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static const char *const FORGETTING_CURVE_OCCURRENCES_TO_LEVEL_UP_KEY;
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static const char *const FORGETTING_CURVE_PROBABILITY_VALUES_TABLE_ID_KEY;
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static const char *const FORGETTING_CURVE_DURATION_TO_LEVEL_DOWN_IN_SECONDS_KEY;
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static const int DEFAULT_MULTIPLE_WORDS_DEMOTION_RATE;
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static const float MULTIPLE_WORD_COST_MULTIPLIER_SCALE;
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static const int DEFAULT_FORGETTING_CURVE_PROBABILITY_VALUES_TABLE_ID;
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const FormatUtils::FORMAT_VERSION mDictFormatVersion;
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const HeaderReadWriteUtils::DictionaryFlags mDictionaryFlags;
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const int mSize;
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DictionaryHeaderStructurePolicy::AttributeMap mAttributeMap;
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const std::vector<int> mLocale;
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const float mMultiWordCostMultiplier;
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const bool mRequiresGermanUmlautProcessing;
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const bool mIsDecayingDict;
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const int mDate;
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const int mLastDecayedTime;
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const EntryCounts mNgramCounts;
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const EntryCounts mMaxNgramCounts;
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const int mExtendedRegionSize;
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const bool mHasHistoricalInfoOfWords;
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const int mForgettingCurveProbabilityValuesTableId;
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const int *const mCodePointTable;
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const std::vector<int> readLocale() const;
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float readMultipleWordCostMultiplier() const;
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bool readRequiresGermanUmlautProcessing() const;
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const EntryCounts readNgramCounts() const;
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const EntryCounts readMaxNgramCounts() const;
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static DictionaryHeaderStructurePolicy::AttributeMap createAttributeMapAndReadAllAttributes(
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const uint8_t *const dictBuf);
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};
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} // namespace latinime
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#endif /* LATINIME_HEADER_POLICY_H */
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