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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 #include "suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.h"
     18 
     19 #include <stdint.h>
     20 
     21 #include "defines.h"
     22 #include "suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.h"
     23 #include "suggest/policyimpl/dictionary/patricia_trie_policy.h"
     24 #include "suggest/policyimpl/dictionary/utils/format_utils.h"
     25 #include "suggest/policyimpl/dictionary/utils/mmapped_buffer.h"
     26 
     27 namespace latinime {
     28 
     29 /* static */ DictionaryStructureWithBufferPolicy *DictionaryStructureWithBufferPolicyFactory
     30         ::newDictionaryStructureWithBufferPolicy(const char *const path, const int bufOffset,
     31                 const int size, const bool isUpdatable) {
     32     // Allocated buffer in MmapedBuffer::openBuffer() will be freed in the destructor of
     33     // impl classes of DictionaryStructureWithBufferPolicy.
     34     const MmappedBuffer *const mmapedBuffer = MmappedBuffer::openBuffer(path, bufOffset, size,
     35             isUpdatable);
     36     if (!mmapedBuffer) {
     37         return 0;
     38     }
     39     switch (FormatUtils::detectFormatVersion(mmapedBuffer->getBuffer(),
     40             mmapedBuffer->getBufferSize())) {
     41         case FormatUtils::VERSION_2:
     42             return new PatriciaTriePolicy(mmapedBuffer);
     43         case FormatUtils::VERSION_3:
     44             return new DynamicPatriciaTriePolicy(mmapedBuffer);
     45         default:
     46             AKLOGE("DICT: dictionary format is unknown, bad magic number");
     47             delete mmapedBuffer;
     48             ASSERT(false);
     49             return 0;
     50     }
     51 }
     52 
     53 } // namespace latinime
     54