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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_SHORTCUT_DICT_CONTENT_H
     18 #define LATINIME_SHORTCUT_DICT_CONTENT_H
     19 
     20 #include <cstdint>
     21 #include <cstdio>
     22 
     23 #include "defines.h"
     24 #include "suggest/policyimpl/dictionary/structure/v4/content/sparse_table_dict_content.h"
     25 #include "suggest/policyimpl/dictionary/structure/v4/content/terminal_position_lookup_table.h"
     26 #include "suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h"
     27 
     28 namespace latinime {
     29 
     30 class ShortcutDictContent : public SparseTableDictContent {
     31  public:
     32     ShortcutDictContent(uint8_t *const *buffers, const int *bufferSizes)
     33             : SparseTableDictContent(buffers, bufferSizes,
     34                       Ver4DictConstants::SHORTCUT_ADDRESS_TABLE_BLOCK_SIZE,
     35                       Ver4DictConstants::SHORTCUT_ADDRESS_TABLE_DATA_SIZE) {}
     36 
     37     ShortcutDictContent()
     38             : SparseTableDictContent(Ver4DictConstants::SHORTCUT_ADDRESS_TABLE_BLOCK_SIZE,
     39                       Ver4DictConstants::SHORTCUT_ADDRESS_TABLE_DATA_SIZE) {}
     40 
     41     void getShortcutEntry(const int maxCodePointCount, int *const outCodePoint,
     42             int *const outCodePointCount, int *const outProbability, bool *const outhasNext,
     43             const int shortcutEntryPos) {
     44         int readingPos = shortcutEntryPos;
     45         return getShortcutEntryAndAdvancePosition(maxCodePointCount, outCodePoint,
     46                 outCodePointCount, outProbability, outhasNext, &readingPos);
     47     }
     48 
     49     void getShortcutEntryAndAdvancePosition(const int maxCodePointCount,
     50             int *const outCodePoint, int *const outCodePointCount, int *const outProbability,
     51             bool *const outhasNext, int *const shortcutEntryPos) const;
     52 
     53    // Returns head position of shortcut list for a PtNode specified by terminalId.
     54    int getShortcutListHeadPos(const int terminalId) const;
     55 
     56    bool flushToFile(FILE *const file) const {
     57        return flush(file);
     58    }
     59 
     60    bool runGC(const TerminalPositionLookupTable::TerminalIdMap *const terminalIdMap,
     61            const ShortcutDictContent *const originalShortcutDictContent);
     62 
     63    bool createNewShortcutList(const int terminalId);
     64 
     65    bool copyShortcutList(const int shortcutListPos, const int toPos);
     66 
     67    bool setProbability(const int probability, const int shortcutEntryPos);
     68 
     69    bool writeShortcutEntry(const int *const codePoint, const int codePointCount,
     70            const int probability, const bool hasNext, const int shortcutEntryPos) {
     71        int writingPos = shortcutEntryPos;
     72        return writeShortcutEntryAndAdvancePosition(codePoint, codePointCount, probability,
     73                hasNext, &writingPos);
     74    }
     75 
     76    bool writeShortcutEntryAndAdvancePosition(const int *const codePoint,
     77            const int codePointCount, const int probability, const bool hasNext,
     78            int *const shortcutEntryPos);
     79 
     80    int findShortcutEntryAndGetPos(const int shortcutListPos,
     81            const int *const targetCodePointsToFind, const int codePointCount) const;
     82 
     83  private:
     84     DISALLOW_COPY_AND_ASSIGN(ShortcutDictContent);
     85 
     86     bool copyShortcutListFromDictContent(const int shortcutListPos,
     87             const ShortcutDictContent *const sourceShortcutDictContent, const int toPos);
     88 
     89     int createAndGetShortcutFlags(const int probability, const bool hasNext) const;
     90 };
     91 } // namespace latinime
     92 #endif /* LATINIME_SHORTCUT_DICT_CONTENT_H */
     93