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/*
* libpinyin
* Library to deal with pinyin.
*
* Copyright (C) 2006-2007, 2011 Peng Wu
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <glib.h>
#include "pinyin.h"
static PhraseLargeTable * g_phrases = NULL;
void print_help(){
printf("Usage: gen_ngram [--skip-pi-gram-training]\n");
printf(" [--bigram-file <FILENAME>]\n");
}
int main(int argc, char * argv[]){
int i = 1;
bool train_pi_gram = true;
const char * bigram_filename = "../../data/bigram.db";
setlocale(LC_ALL, "");
while ( i < argc ){
if ( strcmp("--help", argv[i]) == 0){
print_help();
exit(0);
}else if ( strcmp("--skip-pi-gram-training", argv[i]) == 0 ){
train_pi_gram = false;
}else if ( strcmp("--bigram-file", argv[i]) == 0){
if ( ++i >= argc ) {
print_help();
exit(EINVAL);
}
bigram_filename = argv[i];
}else{
print_help();
exit(EINVAL);
}
++i;
}
g_phrases = new PhraseLargeTable;
//init phrase lookup
MemoryChunk * chunk = new MemoryChunk;
chunk->load("../../data/phrase_index.bin");
g_phrases->load(chunk);
FacadePhraseIndex phrase_index;
//gb_char binary file
chunk = new MemoryChunk;
chunk->load("../../data/gb_char.bin");
phrase_index.load(1, chunk);
//gbk_char binary file
chunk = new MemoryChunk;
chunk->load("../../data/gbk_char.bin");
phrase_index.load(2, chunk);
Bigram bigram;
bigram.attach(bigram_filename, ATTACH_CREATE|ATTACH_READWRITE);
char* linebuf = NULL;
size_t size = 0;
phrase_token_t last_token, cur_token = last_token = 0;
while( getline(&linebuf, &size, stdin) ){
if ( feof(stdin) )
break;
linebuf[strlen(linebuf)-1] = '\0';
glong phrase_len = 0;
utf16_t * phrase = g_utf8_to_utf16(linebuf, -1, NULL, &phrase_len, NULL);
if ( phrase_len == 0 )
continue;
phrase_token_t token = 0;
int result = g_phrases->search( phrase_len, phrase, token);
if ( ! (result & SEARCH_OK) )
token = 0;
last_token = cur_token;
cur_token = token;
if ( cur_token ){
//training uni-gram
phrase_index.add_unigram_frequency(cur_token, 1);
}
if ( cur_token ){
SingleGram * single_gram = NULL;
if ( 0 == last_token ){
if (train_pi_gram)
bigram.load(sentence_start, single_gram);
} else
bigram.load(last_token, single_gram);
if ( NULL == single_gram ){
single_gram = new SingleGram;
}
guint32 freq, total_freq;
//increase freq
if (single_gram->get_freq(cur_token, freq))
assert(single_gram->set_freq(cur_token, freq + 1));
else
assert(single_gram->insert_freq(cur_token, 1));
//increase total freq
single_gram->get_total_freq(total_freq);
single_gram->set_total_freq(total_freq + 1);
if ( 0 == last_token ){
if ( train_pi_gram )
bigram.store(sentence_start, single_gram);
}else
bigram.store(last_token, single_gram);
delete single_gram;
}
}
free(linebuf);
MemoryChunk * new_chunk = new MemoryChunk;
phrase_index.store(1, new_chunk);
new_chunk->save("../../data/gb_char.bin");
phrase_index.load(1, new_chunk);
new_chunk = new MemoryChunk;
phrase_index.store(2, new_chunk);
new_chunk->save("../../data/gbk_char.bin");
phrase_index.load(2, new_chunk);
return 0;
}
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