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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <glib.h>
#include "pinyin_internal.h"
#include "utils_helper.h"
static gboolean train_pi_gram = TRUE;
static const gchar * bigram_filename = SYSTEM_BIGRAM;
static GOptionEntry entries[] =
{
{"skip-pi-gram-training", 0, G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE, &train_pi_gram, "skip pi-gram training", NULL},
{"bigram-file", 0, 0, G_OPTION_ARG_FILENAME, &bigram_filename, "bi-gram file", NULL},
{NULL}
};
int main(int argc, char * argv[]){
FILE * input = stdin;
setlocale(LC_ALL, "");
GError * error = NULL;
GOptionContext * context;
context = g_option_context_new("- generate n-gram");
g_option_context_add_main_entries(context, entries, NULL);
if (!g_option_context_parse(context, &argc, &argv, &error)) {
g_print("option parsing failed:%s\n", error->message);
exit(EINVAL);
}
SystemTableInfo2 system_table_info;
bool retval = system_table_info.load(SYSTEM_TABLE_INFO);
if (!retval) {
fprintf(stderr, "load table.conf failed.\n");
exit(ENOENT);
}
FacadePhraseIndex phrase_index;
const pinyin_table_info_t * phrase_files =
system_table_info.get_default_tables();
if (!load_phrase_index(phrase_files, &phrase_index))
exit(ENOENT);
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, input) ){
if ( feof(input) )
break;
if ( '\n' == linebuf[strlen(linebuf) - 1] ) {
linebuf[strlen(linebuf) - 1] = '\0';
}
TAGLIB_PARSE_SEGMENTED_LINE(&phrase_index, token, linebuf);
last_token = cur_token;
cur_token = token;
/* skip null_token in second word. */
if ( null_token == cur_token )
continue;
/* training uni-gram */
phrase_index.add_unigram_frequency(cur_token, 1);
/* 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);
if (!save_phrase_index(phrase_files, &phrase_index))
exit(ENOENT);
return 0;
}
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