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/*
* libpinyin
* Library to deal with pinyin.
*
* Copyright (C) 2012 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 PHRASE_LARGE_TABLE2_H
#define PHRASE_LARGE_TABLE2_H
#include <stdio.h>
#include "novel_types.h"
#include "memory_chunk.h"
namespace pinyin{
const size_t PHRASE_NUMBER_OF_BITMAP_INDEX = 1<<(sizeof(ucs4_t) / 4 * 8);
class PhraseLengthIndexLevel2;
class PhraseBitmapIndexLevel2{
protected:
PhraseLengthIndexLevel2 * m_phrase_length_indexes[PHRASE_NUMBER_OF_BITMAP_INDEX];
/* use the third byte of ucs4_t for class PhraseLengthIndexLevel2. */
void reset();
public:
PhraseBitmapIndexLevel2();
~PhraseBitmapIndexLevel2(){
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 */ const ucs4_t phrase[],
/* out */ PhraseTokens tokens) const;
/* add_index/remove_index method */
int add_index(int phrase_length, /* in */ const ucs4_t phrase[], /* in */ phrase_token_t token);
int remove_index(int phrase_length, /* in */ const ucs4_t phrase[], /* in */ phrase_token_t token);
/* mask out method */
bool mask_out(phrase_token_t mask, phrase_token_t value);
};
class PhraseLargeTable2{
protected:
PhraseBitmapIndexLevel2 m_bitmap_table;
MemoryChunk * m_chunk;
void reset(){
if ( m_chunk ){
delete m_chunk;
m_chunk = NULL;
}
}
public:
PhraseLargeTable2(){
m_chunk = NULL;
}
~PhraseLargeTable2(){
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 */ const ucs4_t phrase[],
/* out */ PhraseTokens tokens) const {
return m_bitmap_table.search(phrase_length, phrase, tokens);
}
/* add_index/remove_index method */
int add_index(int phrase_length, /* in */ const ucs4_t phrase[], /* in */ phrase_token_t token) {
return m_bitmap_table.add_index(phrase_length, phrase, token);
}
int remove_index(int phrase_length, /* in */ const ucs4_t phrase[], /* in */ phrase_token_t token) {
return m_bitmap_table.remove_index(phrase_length, phrase, token);
}
/* mask out method */
bool mask_out(phrase_token_t mask, phrase_token_t value) {
return m_bitmap_table.mask_out(mask, value);
}
};
static inline int reduce_tokens(const PhraseTokens tokens,
TokenVector tokenarray) {
int num = 0;
g_array_set_size(tokenarray, 0);
for (size_t i = 0; i < PHRASE_INDEX_LIBRARY_COUNT; ++i) {
GArray * array = tokens[i];
if (NULL == array)
continue;
num += array->len;
g_array_append_vals(tokenarray, array->data, array->len);
}
/* the following line will be removed in future after code are verified. */
assert(0 <= num && num <= 4);
return num;
}
/* for compatibility. */
static inline int get_first_token(const PhraseTokens tokens,
/* out */ phrase_token_t & token){
token = null_token;
TokenVector tokenarray = g_array_new(FALSE, FALSE, sizeof(phrase_token_t));
int num = reduce_tokens(tokens, tokenarray);
if (num)
token = g_array_index(tokenarray, phrase_token_t, 0);
g_array_free(tokenarray, TRUE);
return num;
}
};
#endif
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