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/*
* libpinyin
* Library to deal with pinyin.
*
* Copyright (C) 2011 Peng Wu <alexepico@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef CHEWING_LARGE_TABLE_H
#define CHEWING_LARGE_TABLE_H
#include "novel_types.h"
#include "memory_chunk.h"
#include "chewing_key.h"
namespace pinyin{
class ChewingLengthIndexLevel;
class ChewingBitmapIndexLevel{
protected:
pinyin_option_t m_options;
protected:
ChewingLengthIndexLevel * m_chewing_length_indexes
[CHEWING_NUMBER_OF_INITIALS][CHEWING_NUMBER_OF_MIDDLES]
[CHEWING_NUMBER_OF_FINALS][CHEWING_NUMBER_OF_TONES];
/* search functions */
int initial_level_search(int word_length, /* in */ChewingKey keys[],
/* out */ PhraseIndexRanges ranges) const;
int middle_and_final_level_search(int word_length, ChewingKey keys[],
/* out */ PhraseIndexRanges ranges)const;
int tone_level_search(int word_length, /* in */ ChewingKey keys[],
/* out */ PhraseIndexRanges ranges) const;
void reset();
public:
/* constructor/destructor */
ChewingBitmapIndexLevel(pinyin_option_t options) : m_options(options){}
~ChewingBitmapIndexLevel() { reset(); }
/* load/store method */
bool load(MemoryChunk * chunk, table_offset_t offset, table_offset_t end);
bool store(MemoryChunk * new_chunk, table_offset_t offset,
table_offset_t & end);
/* search method */
int search(int phrase_length, /* in */ ChewingKey keys[],
/* out */ PhraseIndexRanges ranges) const;
/* add/remove index method */
int add_index(int phrase_length, /* in */ ChewingKey keys[],
/* in */ phrase_token_t token);
int remove_index(int phrase_length, /* in */ ChewingKey keys[],
/* in */ phrase_token_t token);
};
class ChewingLargeTable{
protected:
ChewingBitmapIndexLevel m_bitmap_table;
MemoryChunk * m_chunk;
void reset(){
if (m_chunk) {
delete m_chunk; m_chunk = NULL;
}
}
public:
/* constructor/destructor */
ChewingLargeTable(pinyin_option_t options):
m_bitmap_table(options), m_chunk(NULL) {}
~ChewingLargeTable() { reset(); }
/* load/store method */
bool load(MemoryChunk * chunk) {
reset();
m_chunk = chunk;
return m_bitmap_table.load(chunk, 0, chunk->size());
}
bool store(MemoryChunk * new_chunk) {
table_offset_t end;
return m_bitmap_table.store(new_chunk, 0, end);
}
bool load_text(FILE * file);
/* search method */
int search(int phrase_length, /* in */ ChewingKey keys[],
/* out */ PhraseIndexRanges ranges) {
return m_bitmap_table.search(phrase_length, keys, ranges);
}
/* add/remove index method */
int add_index(int phrase_length, /* in */ ChewingKey keys[],
/* in */ phrase_token_t token) {
return m_bitmap_table.add_index(phrase_length, keys, token);
}
int remove_index(int phrase_length, /* in */ ChewingKey keys[],
/* in */ phrase_token_t token) {
return m_bitmap_table.remove_index(phrase_length, keys, token);
}
};
};
#endif
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