add phrase_large_table2.h

1 files changed, 113 insertions, 0 deletions

diff --git a/src/storage/phrase_large_table2.h b/src/storage/phrase_large_table2.h
new file mode 100644
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+++ b/src/storage/phrase_large_table2.h
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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 * newchunk, table_offset_t offset, table_offset_t & end);
+
+    /* search method */
+    int search(int phrase_length, /* in */ ucs4_t phrase[],
+               /* out */ PhraseTokens tokens);
+
+    /* add_index/remove_index method */
+    int add_index(int phrase_length, /* in */ ucs4_t phrase[], /* in */ phrase_token_t token);
+
+    int remove_index(int phrase_length, /* in */ ucs4_t phrase[], /* in */ phrase_token_t token);
+};
+
+
+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 * newchunk){
+        table_offset_t end;
+        return m_bitmap_table.store(newchunk, 0, end);
+    }
+
+    bool load_text(FILE * file);
+
+    /* search method */
+    int search(int phrase_length, /* in */ 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 */ 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 */ ucs4_t phrase[], /* out */ phrase_token_t token) {
+        return m_bitmap_table.remove_index(phrase_length, phrase, token);
+    }
+};
+
+};
+
+#endif