63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef PINYINIME_ANDPY_INCLUDE_LPICACHE_H__
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#define PINYINIME_ANDPY_INCLUDE_LPICACHE_H__
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#include <stdlib.h>
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#include "./searchutility.h"
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#include "./spellingtrie.h"
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namespace ime_pinyin {
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// Used to cache LmaPsbItem list for half spelling ids.
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class LpiCache {
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private:
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static LpiCache *instance_;
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static const int kMaxLpiCachePerId = 15;
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LmaPsbItem *lpi_cache_;
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uint16 *lpi_cache_len_;
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public:
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LpiCache();
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~LpiCache();
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static LpiCache& get_instance();
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// Test if the LPI list of the given splid has been cached.
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// If splid is a full spelling id, it returns false, because we only cache
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// list for half ids.
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bool is_cached(uint16 splid);
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// Put LPI list to cahce. If the length of the list, lpi_num, is longer than
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// the cache buffer. the list will be truncated, and function returns the
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// maximum length of the cache buffer.
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// Note: splid must be a half id, and lpi_items must be not NULL. The
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// caller of this function should guarantee this.
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size_t put_cache(uint16 splid, LmaPsbItem lpi_items[], size_t lpi_num);
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// Get the cached list for the given half id.
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// Return the length of the cached buffer.
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// Note: splid must be a half id, and lpi_items must be not NULL. The
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// caller of this function should guarantee this.
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size_t get_cache(uint16 splid, LmaPsbItem lpi_items[], size_t lpi_max);
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};
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} // namespace
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#endif // PINYINIME_ANDPY_INCLUDE_LPICACHE_H__
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