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/*
* libpinyin
* Library to deal with pinyin.
*
* Copyright (C) 2010 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 <assert.h>
#include <glib.h>
#include "pinyin.h"
/* export interpolation model as textual format */
void gen_unigram(FILE * output, FacadePhraseIndex * phrase_index);
void gen_bigram(FILE * output, FacadePhraseIndex * phrase_index, Bigram * bigram);
/* consider moving the following function to utils/storage/utility.h */
char * token_to_string(FacadePhraseIndex * phrase_index, phrase_token_t token);
void begin_data(FILE * file){
fprintf(file, "\\data model interpolation\n");
}
void end_data(FILE * file){
fprintf(file, "\\end\n");
}
int main(int argc, char * argv[]){
FILE * output = stdout;
const char * bigram_filename = "../../data/bigram.db";
FacadePhraseIndex phrase_index;
//gb_char binary file
MemoryChunk * 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, NULL);
begin_data(output);
gen_unigram(output, &phrase_index);
gen_bigram(output, &phrase_index, &bigram);
end_data(output);
return 0;
}
void gen_unigram(FILE * output, FacadePhraseIndex * phrase_index) {
fprintf(output, "\\1-gram\n");
for ( size_t i = 0; i < PHRASE_INDEX_LIBRARY_COUNT; i++) {
PhraseIndexRange range;
int result = phrase_index->get_range(i, range);
if ( result )
continue;
PhraseItem item;
for ( size_t j = range.m_range_begin; j < range.m_range_end; j++) {
int result = phrase_index->get_phrase_item(j, item);
if ( result == ERROR_NO_ITEM )
continue;
assert( result == ERROR_OK);
size_t freq = item.get_unigram_frequency();
char * phrase = token_to_string(phrase_index, j);
if ( phrase )
fprintf(output, "\\item %s count %lu\n", phrase, freq);
g_free(phrase);
}
}
}
void gen_bigram(FILE * output, FacadePhraseIndex * phrase_index, Bigram * bigram){
fprintf(output, "\\2-gram\n");
/* Retrieve all user items. */
GArray * system_items = g_array_new(FALSE, FALSE, sizeof(phrase_token_t));
GArray * user_items = g_array_new(FALSE, FALSE, sizeof(phrase_token_t));
bigram->get_all_items(system_items, user_items);
assert(0 == user_items->len);
g_array_free(user_items, TRUE);
PhraseItem item;
for(size_t i = 0; i < system_items->len; i++){
phrase_token_t token = g_array_index(system_items, phrase_token_t, i);
SingleGram * system = NULL, * user = NULL;
bigram->load(token, system, user);
assert(NULL == user);
BigramPhraseWithCountArray array = g_array_new(FALSE, FALSE, sizeof(BigramPhraseItemWithCount));
system->retrieve_all(array);
for(size_t j = 0; j < array->len; j++) {
BigramPhraseItemWithCount * item = &g_array_index(array, BigramPhraseItemWithCount, j);
char * word1 = token_to_string(phrase_index, token);
char * word2 = token_to_string(phrase_index, item->m_token);
guint32 freq = item->m_count;
if ( word1 && word2)
fprintf(output, "\\item %s %s count %d\n", word1, word2, freq);
g_free(word1); g_free(word2);
}
g_array_free(array, TRUE);
}
g_array_free(system_items, TRUE);
}
static const char * special_token_to_string(phrase_token_t token){
struct token_pair{
phrase_token_t token;
const char * string;
};
static const token_pair tokens [] = {
{sentence_start, "<start>"},
{0, NULL}
};
const token_pair * pair = tokens;
while (pair->token) {
if ( token == pair->token )
return pair->string;
}
fprintf(stderr, "error: unknown token:%d.\n", token);
return NULL;
}
char * token_to_string(FacadePhraseIndex * phrase_index, phrase_token_t token) {
PhraseItem item;
utf16_t buffer[MAX_PHRASE_LENGTH];
gchar * phrase;
/* deal with the special phrase index, for "<start>..." */
if ( PHRASE_INDEX_LIBRARY_INDEX(token) == 0 ) {
return g_strdup(special_token_to_string(token));
}
int result = phrase_index->get_phrase_item(token, item);
if (result != ERROR_OK) {
fprintf(stderr, "error: unknown token:%d.\n", token);
return NULL;
}
item.get_phrase_string(buffer);
guint8 length = item.get_phrase_length();
phrase = g_utf16_to_utf8(buffer, length, NULL, NULL, NULL);
return phrase;
}
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