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      1 /*
      2  * Copyright (C) 2013, The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef LATINIME_SPARSE_TABLE_DICT_CONTENT_H
     18 #define LATINIME_SPARSE_TABLE_DICT_CONTENT_H
     19 
     20 #include <cstdio>
     21 
     22 #include "defines.h"
     23 #include "dictionary/structure/v4/ver4_dict_constants.h"
     24 #include "dictionary/utils/buffer_with_extendable_buffer.h"
     25 #include "dictionary/utils/sparse_table.h"
     26 #include "utils/byte_array_view.h"
     27 
     28 namespace latinime {
     29 
     30 // TODO: Support multiple contents.
     31 class SparseTableDictContent {
     32  public:
     33     AK_FORCE_INLINE SparseTableDictContent(const ReadWriteByteArrayView *const buffers,
     34             const int sparseTableBlockSize, const int sparseTableDataSize)
     35             : mExpandableLookupTableBuffer(buffers[LOOKUP_TABLE_BUFFER_INDEX],
     36                       BufferWithExtendableBuffer::DEFAULT_MAX_ADDITIONAL_BUFFER_SIZE),
     37               mExpandableAddressTableBuffer(buffers[ADDRESS_TABLE_BUFFER_INDEX],
     38                       BufferWithExtendableBuffer::DEFAULT_MAX_ADDITIONAL_BUFFER_SIZE),
     39               mExpandableContentBuffer(buffers[CONTENT_BUFFER_INDEX],
     40                       BufferWithExtendableBuffer::DEFAULT_MAX_ADDITIONAL_BUFFER_SIZE),
     41               mAddressLookupTable(&mExpandableLookupTableBuffer, &mExpandableAddressTableBuffer,
     42                       sparseTableBlockSize, sparseTableDataSize) {}
     43 
     44     SparseTableDictContent(const int sparseTableBlockSize, const int sparseTableDataSize)
     45             : mExpandableLookupTableBuffer(Ver4DictConstants::MAX_DICTIONARY_SIZE),
     46               mExpandableAddressTableBuffer(Ver4DictConstants::MAX_DICTIONARY_SIZE),
     47               mExpandableContentBuffer(Ver4DictConstants::MAX_DICTIONARY_SIZE),
     48               mAddressLookupTable(&mExpandableLookupTableBuffer, &mExpandableAddressTableBuffer,
     49                       sparseTableBlockSize, sparseTableDataSize) {}
     50 
     51     virtual ~SparseTableDictContent() {}
     52 
     53     bool isNearSizeLimit() const {
     54         return mExpandableLookupTableBuffer.isNearSizeLimit()
     55                 || mExpandableAddressTableBuffer.isNearSizeLimit()
     56                 || mExpandableContentBuffer.isNearSizeLimit();
     57     }
     58 
     59  protected:
     60     SparseTable *getUpdatableAddressLookupTable() {
     61         return &mAddressLookupTable;
     62     }
     63 
     64     const SparseTable *getAddressLookupTable() const {
     65         return &mAddressLookupTable;
     66     }
     67 
     68     BufferWithExtendableBuffer *getWritableContentBuffer() {
     69         return &mExpandableContentBuffer;
     70     }
     71 
     72     const BufferWithExtendableBuffer *getContentBuffer() const {
     73         return &mExpandableContentBuffer;
     74     }
     75 
     76     bool flush(FILE *const file) const;
     77 
     78  private:
     79     DISALLOW_IMPLICIT_CONSTRUCTORS(SparseTableDictContent);
     80 
     81     static const int LOOKUP_TABLE_BUFFER_INDEX;
     82     static const int ADDRESS_TABLE_BUFFER_INDEX;
     83     static const int CONTENT_BUFFER_INDEX;
     84 
     85     BufferWithExtendableBuffer mExpandableLookupTableBuffer;
     86     BufferWithExtendableBuffer mExpandableAddressTableBuffer;
     87     BufferWithExtendableBuffer mExpandableContentBuffer;
     88     SparseTable mAddressLookupTable;
     89 };
     90 } // namespace latinime
     91 #endif /* LATINIME_SPARSE_TABLE_DICT_CONTENT_H */
     92