1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
* 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"
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 = "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;
}
PhraseLargeTable2 phrase_table;
/* init phrase table */
MemoryChunk * chunk = new MemoryChunk;
chunk->load("phrase_index.bin");
phrase_table.load(chunk);
FacadePhraseIndex phrase_index;
if (!load_phrase_index(&phrase_index))
exit(ENOENT);
Bigram bigram;
bigram.attach(bigram_filename, ATTACH_CREATE|ATTACH_READWRITE);
PhraseTokens tokens;
memset(tokens, 0, sizeof(PhraseTokens));
phrase_index.prepare_tokens(tokens);
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';
}
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;
}
phrase_index.destroy_tokens(tokens);
free(linebuf);
if (!save_phrase_index(&phrase_index))
exit(ENOENT);
return 0;
}
|
