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/*
* libpinyin
* Library to deal with pinyin.
*
* Copyright (C) 2011 Peng Wu <alexepico@gmail.com>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "pinyin_internal.h"
#include "utils_helper.h"
enum LINE_TYPE{
BEGIN_LINE = 1,
END_LINE,
GRAM_1_LINE,
GRAM_2_LINE,
GRAM_1_ITEM_LINE,
GRAM_2_ITEM_LINE
};
static int line_type = 0;
static GPtrArray * values = NULL;
static GHashTable * required = NULL;
/* variables for line buffer. */
static char * linebuf = NULL;
static size_t len = 0;
bool parse_headline(FILE * input, FILE * output);
bool parse_unigram(FILE * input, FILE * output);
bool parse_bigram(FILE * input, FILE * output);
static ssize_t my_getline(FILE * input){
ssize_t result = getline(&linebuf, &len, input);
if ( result == -1 )
return result;
linebuf[strlen(linebuf) - 1] = '\0';
return result;
}
bool parse_headline(FILE * input, FILE * output) {
/* enter "\data" line */
assert(taglib_add_tag(BEGIN_LINE, "\\data", 0, "model",
"count:N:total_freq"));
/* read "\data" line */
if ( !taglib_read(linebuf, line_type, values, required) ) {
fprintf(stderr, "error: k mixture model expected.\n");
return false;
}
assert(line_type == BEGIN_LINE);
TAGLIB_GET_TAGVALUE(const char *, model, (const char *));
if ( !( strcmp("k mixture model", model) == 0 ) ){
fprintf(stderr, "error: k mixture model expected.\n");
return false;
}
/* print header */
fprintf(output, "\\data model interpolation\n");
return true;
}
bool parse_body(FILE * input, FILE * output){
taglib_push_state();
assert(taglib_add_tag(END_LINE, "\\end", 0, "", ""));
assert(taglib_add_tag(GRAM_1_LINE, "\\1-gram", 0, "", ""));
assert(taglib_add_tag(GRAM_2_LINE, "\\2-gram", 0, "", ""));
do {
retry:
assert(taglib_read(linebuf, line_type, values, required));
switch(line_type) {
case END_LINE:
fprintf(output, "\\end\n");
goto end;
case GRAM_1_LINE:
fprintf(output, "\\1-gram\n");
my_getline(input);
parse_unigram(input, output);
goto retry;
case GRAM_2_LINE:
fprintf(output, "\\2-gram\n");
my_getline(input);
parse_bigram(input, output);
goto retry;
default:
assert(false);
}
} while (my_getline(input) != -1);
end:
taglib_pop_state();
return true;
}
bool parse_unigram(FILE * input, FILE * output){
taglib_push_state();
assert(taglib_add_tag(GRAM_1_ITEM_LINE, "\\item", 2, "freq", "count"));
do {
assert(taglib_read(linebuf, line_type, values, required));
switch(line_type) {
case GRAM_1_ITEM_LINE: {
/* handle \item in \1-gram */
TAGLIB_GET_TOKEN(token, 0);
TAGLIB_GET_PHRASE_STRING(word, 1);
/* remove the "<start>" in the uni-gram of interpolation model */
if ( sentence_start == token )
break;
TAGLIB_GET_TAGVALUE(glong, freq, atol);
/* ignore zero unigram freq item */
if ( 0 != freq )
fprintf(output, "\\item %d %s count %ld\n", token, word, freq);
break;
}
case END_LINE:
case GRAM_1_LINE:
case GRAM_2_LINE:
goto end;
default:
assert(false);
}
} while (my_getline(input) != -1);
end:
taglib_pop_state();
return true;
}
bool parse_bigram(FILE * input, FILE * output){
taglib_push_state();
assert(taglib_add_tag(GRAM_2_ITEM_LINE, "\\item", 4,
"count", "T:N_n_0:n_1:Mr"));
do {
assert(taglib_read(linebuf, line_type, values, required));
switch (line_type) {
case GRAM_2_ITEM_LINE:{
/* handle \item in \2-gram */
/* two strings */
TAGLIB_GET_TOKEN(token1, 0);
TAGLIB_GET_PHRASE_STRING(word1, 1);
TAGLIB_GET_TOKEN(token2, 2);
TAGLIB_GET_PHRASE_STRING(word2, 3);
TAGLIB_GET_TAGVALUE(glong, count, atol);
fprintf(output, "\\item %d %s %d %s count %ld\n",
token1, word1, token2, word2, count);
break;
}
case END_LINE:
case GRAM_1_LINE:
case GRAM_2_LINE:
goto end;
default:
assert(false);
}
} while (my_getline(input) != -1);
end:
taglib_pop_state();
return true;
}
int main(int argc, char * argv[]){
FILE * input = stdin;
FILE * output = stdout;
taglib_init();
values = g_ptr_array_new();
required = g_hash_table_new(g_str_hash, g_str_equal);
ssize_t result = my_getline(input);
if ( result == -1 ) {
fprintf(stderr, "empty file input.\n");
exit(ENODATA);
}
if (!parse_headline(input, output))
exit(ENODATA);
result = my_getline(input);
if ( result != -1 )
parse_body(input, output);
taglib_fini();
return 0;
}
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