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/*
* 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_HEADER_POLICY_H
#define LATINIME_HEADER_POLICY_H
#include <stdint.h>
#include "defines.h"
#include "suggest/core/policy/dictionary_header_structure_policy.h"
#include "suggest/policyimpl/dictionary/header/header_read_write_utils.h"
#include "suggest/policyimpl/dictionary/utils/format_utils.h"
namespace latinime {
class HeaderPolicy : public DictionaryHeaderStructurePolicy {
public:
// Reads information from existing dictionary buffer.
HeaderPolicy(const uint8_t *const dictBuf, const int dictSize)
: mDictFormatVersion(FormatUtils::detectFormatVersion(dictBuf, dictSize)),
mDictionaryFlags(HeaderReadWriteUtils::getFlags(dictBuf)),
mSize(HeaderReadWriteUtils::getHeaderSize(dictBuf)),
mAttributeMap(createAttributeMapAndReadAllAttributes(dictBuf)),
mMultiWordCostMultiplier(readMultipleWordCostMultiplier()),
mUsesForgettingCurve(readUsesForgettingCurveFlag()),
mLastUpdatedTime(readLastUpdatedTime()) {}
// Constructs header information using an attribute map.
HeaderPolicy(const FormatUtils::FORMAT_VERSION dictFormatVersion,
const HeaderReadWriteUtils::AttributeMap *const attributeMap)
: mDictFormatVersion(dictFormatVersion),
mDictionaryFlags(HeaderReadWriteUtils::createAndGetDictionaryFlagsUsingAttributeMap(
attributeMap)), mSize(0), mAttributeMap(*attributeMap),
mMultiWordCostMultiplier(readUsesForgettingCurveFlag()),
mUsesForgettingCurve(readUsesForgettingCurveFlag()),
mLastUpdatedTime(readLastUpdatedTime()) {}
~HeaderPolicy() {}
AK_FORCE_INLINE int getSize() const {
return mSize;
}
AK_FORCE_INLINE bool supportsDynamicUpdate() const {
return HeaderReadWriteUtils::supportsDynamicUpdate(mDictionaryFlags);
}
AK_FORCE_INLINE bool requiresGermanUmlautProcessing() const {
return HeaderReadWriteUtils::requiresGermanUmlautProcessing(mDictionaryFlags);
}
AK_FORCE_INLINE bool requiresFrenchLigatureProcessing() const {
return HeaderReadWriteUtils::requiresFrenchLigatureProcessing(mDictionaryFlags);
}
AK_FORCE_INLINE float getMultiWordCostMultiplier() const {
return mMultiWordCostMultiplier;
}
AK_FORCE_INLINE bool usesForgettingCurve() const {
return mUsesForgettingCurve;
}
AK_FORCE_INLINE int getLastUpdatedTime() const {
return mLastUpdatedTime;
}
void readHeaderValueOrQuestionMark(const char *const key,
int *outValue, int outValueSize) const;
bool writeHeaderToBuffer(BufferWithExtendableBuffer *const bufferToWrite,
const bool updatesLastUpdatedTime) const;
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(HeaderPolicy);
static const char *const MULTIPLE_WORDS_DEMOTION_RATE_KEY;
static const char *const USES_FORGETTING_CURVE_KEY;
static const char *const LAST_UPDATED_TIME_KEY;
static const int DEFAULT_MULTIPLE_WORDS_DEMOTION_RATE;
static const float MULTIPLE_WORD_COST_MULTIPLIER_SCALE;
const FormatUtils::FORMAT_VERSION mDictFormatVersion;
const HeaderReadWriteUtils::DictionaryFlags mDictionaryFlags;
const int mSize;
HeaderReadWriteUtils::AttributeMap mAttributeMap;
const float mMultiWordCostMultiplier;
const bool mUsesForgettingCurve;
const int mLastUpdatedTime;
float readMultipleWordCostMultiplier() const;
bool readUsesForgettingCurveFlag() const;
int readLastUpdatedTime() const;
static HeaderReadWriteUtils::AttributeMap createAttributeMapAndReadAllAttributes(
const uint8_t *const dictBuf);
};
} // namespace latinime
#endif /* LATINIME_HEADER_POLICY_H */
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