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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_internal.h"
static PhraseLargeTable * g_phrases = NULL;
void print_help(){
printf("Usage: gen_deleted_ngram [--skip-pi-gram-training]\n");
printf(" [--deleted-bigram-file <FILENAME>]\n");
}
int main(int argc, char * argv[]){
int i = 1;
bool train_pi_gram = true;
const char * bigram_filename = "deleted_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("--deleted-bigram-file", argv[i]) == 0){
if ( ++i >= argc ) {
print_help();
exit(EINVAL);
}
bigram_filename = argv[i];
} else {
print_help();
exit(EINVAL);
}
++i;
}
PhraseLargeTable phrases;
//init phrase lookup
MemoryChunk * new_chunk = new MemoryChunk;
new_chunk->load("phrase_index.bin");
phrases.load(new_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;
if ( '\n' == linebuf[strlen(linebuf)-1] )
linebuf[strlen(linebuf)-1] = '\0';
glong phrase_len = 0;
utf16_t * phrase = g_utf8_to_utf16(linebuf, -1, NULL, &phrase_len, NULL);
phrase_token_t token = 0;
if ( 0 != phrase_len ) {
int result = phrases.search( phrase_len, phrase, token);
if ( ! (result & SEARCH_OK) )
token = 0;
g_free(phrase);
phrase = NULL;
}
last_token = cur_token;
cur_token = token;
/* skip null_token in second word. */
if ( null_token == cur_token )
continue;
/* skip pi-gram training. */
if ( null_token == last_token ){
if ( !train_pi_gram )
continue;
last_token = sentence_start;
}
/* train bi-gram */
SingleGram * single_gram = NULL;
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);
bigram.store(last_token, single_gram);
delete single_gram;
}
free(linebuf);
return 0;
}
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