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/*
* libpinyin
* Library to deal with pinyin.
*
* Copyright (C) 2024 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 "punct_table.h"
#include <tkrzw_dbm.h>
#include <tkrzw_dbm_tree.h>
#include <tkrzw_file_util.h>
#include <string>
#include <string_view>
#include <memory>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include "tkrzwdb_utils.h"
using namespace tkrzw;
using namespace pinyin;
PunctTable::PunctTable() {
/* create in-memory db. */
m_db = new BabyDBM;
m_entry = new PunctTableEntry;
}
void PunctTable::reset() {
if (m_db) {
m_db->Synchronize(false);
m_db->Close();
delete m_db;
m_db = NULL;
}
if (m_entry) {
delete m_entry;
m_entry = NULL;
}
}
/* attach method */
bool PunctTable::attach(const char * dbfile, guint32 flags) {
bool writable = false;
reset();
m_entry = new PunctTableEntry;
int32_t options = attach_options(flags, writable);
if (!dbfile)
return false;
m_db = new TreeDBM;
return m_db->Open(dbfile, writable, options) == Status::SUCCESS;
}
/* load_db/save_db method */
/* use in-memory DBM here, for better performance. */
bool PunctTable::load_db(const char * filename) {
reset();
m_entry = new PunctTableEntry;
/* create in-memory db. */
m_db = new BabyDBM;
TreeDBM tmp_db;
if (tmp_db.Open(filename, false, File::OPEN_DEFAULT) != Status::SUCCESS)
return false;
copy_tkrzwdb(&tmp_db, m_db);
tmp_db.Close();
return true;
}
bool PunctTable::save_db(const char * new_filename) {
Status status = RemoveFile(new_filename);
if (status != Status::SUCCESS && status != Status::NOT_FOUND_ERROR)
return false;
TreeDBM tmp_db;
if (tmp_db.Open(new_filename, true, File::OPEN_DEFAULT) != Status::SUCCESS)
return false;
copy_tkrzwdb(m_db, &tmp_db);
tmp_db.Synchronize(false);
tmp_db.Close();
return true;
}
bool PunctTable::load_entry(phrase_token_t index) {
if (NULL == m_db)
return false;
assert(NULL != m_entry);
m_entry->m_chunk.set_size(0);
const std::string_view kbuf(reinterpret_cast<const char*>(&index), sizeof(index));
std::string value;
const Status status = m_db->Get(kbuf, &value);
if (status == Status::NOT_FOUND_ERROR || 0 == value.size())
return true;
if (status != Status::SUCCESS)
return false;
m_entry->m_chunk.set_size(value.size());
char * vbuf = (char *) m_entry->m_chunk.begin();
memcpy(vbuf, value.data(), value.size());
return true;
}
bool PunctTable::store_entry(phrase_token_t index) {
if (NULL == m_db)
return false;
assert(NULL != m_entry);
const std::string_view kbuf(reinterpret_cast<const char*>(&index), sizeof(index));
const std::string_view vbuf(reinterpret_cast<const char*>(m_entry->m_chunk.begin()),
m_entry->m_chunk.size());
return m_db->Set(kbuf, vbuf) == Status::SUCCESS;
}
bool PunctTable::remove_all_punctuations(/* in */ phrase_token_t index) {
if (NULL == m_db)
return false;
const std::string_view kbuf(reinterpret_cast<const char*>(&index), sizeof(index));
const Status status = m_db->Remove(kbuf);
return status == Status::SUCCESS || status == Status::NOT_FOUND_ERROR;
}
bool PunctTable::get_all_items(/* out */ GArray * items) {
g_array_set_size(items, 0);
if ( !m_db )
return false;
std::unique_ptr<DBM::Iterator> iter(m_db->MakeIterator());
if (!iter)
return false;
iter->First();
std::string key;
while (iter->Get(&key).IsOK()) {
assert(key.size() == sizeof(phrase_token_t));
const phrase_token_t * token = reinterpret_cast<const phrase_token_t *>(key.data());
g_array_append_val(items, *token);
iter->Next();
}
return true;
}
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