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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_LIST_POLICY_H
     18 #define LATINIME_SHORTCUT_LIST_POLICY_H
     19 
     20 #include <cstdint>
     21 
     22 #include "defines.h"
     23 #include "dictionary/interface/dictionary_shortcuts_structure_policy.h"
     24 #include "dictionary/structure/pt_common/shortcut/shortcut_list_reading_utils.h"
     25 #include "utils/byte_array_view.h"
     26 
     27 namespace latinime {
     28 
     29 class ShortcutListPolicy : public DictionaryShortcutsStructurePolicy {
     30  public:
     31     explicit ShortcutListPolicy(const ReadOnlyByteArrayView buffer) : mBuffer(buffer) {}
     32 
     33     ~ShortcutListPolicy() {}
     34 
     35     int getStartPos(const int pos) const {
     36         if (pos == NOT_A_DICT_POS) {
     37             return NOT_A_DICT_POS;
     38         }
     39         int listPos = pos;
     40         ShortcutListReadingUtils::getShortcutListSizeAndForwardPointer(mBuffer, &listPos);
     41         return listPos;
     42     }
     43 
     44     void getNextShortcut(const int maxCodePointCount, int *const outCodePoint,
     45             int *const outCodePointCount, bool *const outIsWhitelist, bool *const outHasNext,
     46             int *const pos) const {
     47         const ShortcutListReadingUtils::ShortcutFlags flags =
     48                 ShortcutListReadingUtils::getFlagsAndForwardPointer(mBuffer, pos);
     49         if (outHasNext) {
     50             *outHasNext = ShortcutListReadingUtils::hasNext(flags);
     51         }
     52         if (outIsWhitelist) {
     53             *outIsWhitelist = ShortcutListReadingUtils::isWhitelist(flags);
     54         }
     55         if (outCodePoint) {
     56             *outCodePointCount = ShortcutListReadingUtils::readShortcutTarget(
     57                     mBuffer, maxCodePointCount, outCodePoint, pos);
     58         }
     59     }
     60 
     61     void skipAllShortcuts(int *const pos) const {
     62         const int shortcutListSize = ShortcutListReadingUtils
     63                 ::getShortcutListSizeAndForwardPointer(mBuffer, pos);
     64         *pos += shortcutListSize;
     65     }
     66 
     67  private:
     68     DISALLOW_IMPLICIT_CONSTRUCTORS(ShortcutListPolicy);
     69 
     70     const ReadOnlyByteArrayView mBuffer;
     71 };
     72 } // namespace latinime
     73 #endif // LATINIME_SHORTCUT_LIST_POLICY_H
     74