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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 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 <ctype.h>
#include <assert.h>
#include <string.h>
#include "stl_lite.h"
#include "pinyin_custom2.h"
#include "chewing_key.h"
#include "pinyin_parser2.h"
#include "pinyin_parser_table.h"
using namespace pinyin;
static bool check_pinyin_options(guint32 options, const pinyin_index_item_t * item) {
guint32 flags = item->m_flags;
assert (flags & IS_PINYIN);
/* handle incomplete pinyin. */
if (flags & PINYIN_INCOMPLETE) {
if (!(options & PINYIN_INCOMPLETE))
return false;
}
/* handle correct pinyin, currently only one flag per item. */
flags &= PINYIN_CORRECT_ALL;
options &= PINYIN_CORRECT_ALL;
if (flags) {
if ((flags & options) != flags)
return false;
}
return true;
}
static bool check_chewing_options(guint32 options, const chewing_index_item_t * item) {
guint32 flags = item->m_flags;
assert (flags & IS_CHEWING);
/* handle incomplete chewing. */
if (flags & CHEWING_INCOMPLETE) {
if (!(options & CHEWING_INCOMPLETE))
return false;
}
return true;
}
/* methods for Chewing Keys to access pinyin parser table. */
const char * ChewingKeyRest::get_pinyin_string(){
if (m_table_index == 0)
return NULL;
/* check end boundary. */
assert(m_table_index < G_N_ELEMENTS(content_table));
return content_table[m_table_index].m_pinyin_str;
}
const char * ChewingKeyRest::get_chewing_string(){
if (m_table_index == 0)
return NULL;
/* check end boundary. */
assert(m_table_index < G_N_ELEMENTS(content_table));
return content_table[m_table_index].m_chewing_str;
}
static bool compare_less_than(const pinyin_index_item_t & lhs,
const pinyin_index_item_t & rhs){
return 0 > strcmp(lhs.m_pinyin_input, rhs.m_pinyin_input);
}
int FullPinyinParser2::parse_one_key (guint32 options, ChewingKey & key,
ChewingKeyRest & key_rest,
const char * pinyin, int len) const {
/* "'" are not accepted in parse_one_key. */
assert(NULL == strchr(pinyin, '\''));
gchar * input = g_strndup(pinyin, len);
guint16 tone = CHEWING_ZERO_TONE; guint16 tone_pos = 0;
guint16 parsed_len = len;
key = ChewingKey(); key_rest = ChewingKeyRest();
/* find the tone in the last character. */
char chr = input[parsed_len - 1];
if ( '0' < chr && chr <= '5' ) {
tone = chr - '0';
parsed_len --;
tone_pos = parsed_len;
}
/* parse pinyin core staff here. */
pinyin_index_item_t item;
memset(&item, 0, sizeof(item));
for (; parsed_len > 0; --parsed_len) {
input[parsed_len] = '\0';
item.m_pinyin_input = input;
std_lite::pair<const pinyin_index_item_t *,
const pinyin_index_item_t *> range;
range = std_lite::equal_range
(pinyin_index, pinyin_index + G_N_ELEMENTS(pinyin_index),
item, compare_less_than);
guint16 len = range.second - range.first;
assert (len <= 1);
if ( len == 1 ) {
const pinyin_index_item_t * index = range.first;
if (!check_pinyin_options(options, index))
continue;
key_rest.m_table_index = index->m_table_index;
key = content_table[key_rest.m_table_index].m_chewing_key;
break;
}
}
/* post processing tone. */
if ( parsed_len == tone_pos ) {
if (tone != CHEWING_ZERO_TONE) {
key.m_tone = tone;
parsed_len ++;
}
}
key_rest.m_raw_begin = 0; key_rest.m_raw_end = parsed_len;
g_free(input);
return parsed_len;
}
int FullPinyinParser2::parse (guint32 options, ChewingKeyVector & keys,
ChewingKeyRestVector & key_rests,
const char *str, int len) const {
assert(FALSE);
}
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