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/**
* @file Backup.cpp
* @ingroup SQLiteCpp
* @brief Backup is used to backup a database file in a safe and online way.
*
* Copyright (c) 2015 Shibao HONG ([email protected])
* Copyright (c) 2015-2021 Sebastien Rombauts ([email protected])
*
* Distributed under the MIT License (MIT) (See accompanying file LICENSE.txt
* or copy at http://opensource.org/licenses/MIT)
*/
#include <SQLiteCpp/Backup.h>
#include <SQLiteCpp/Exception.h>
#include <sqlite3.h>
namespace SQLite
{
// Initialize resource for SQLite database backup
Backup::Backup(Database& aDestDatabase,
const char* apDestDatabaseName,
Database& aSrcDatabase,
const char* apSrcDatabaseName)
{
mpSQLiteBackup = sqlite3_backup_init(aDestDatabase.getHandle(),
apDestDatabaseName,
aSrcDatabase.getHandle(),
apSrcDatabaseName);
if (nullptr == mpSQLiteBackup)
{
// If an error occurs, the error code and message are attached to the destination database connection.
throw SQLite::Exception(aDestDatabase.getHandle());
}
}
Backup::Backup(Database& aDestDatabase,
const std::string& aDestDatabaseName,
Database& aSrcDatabase,
const std::string& aSrcDatabaseName) :
Backup(aDestDatabase, aDestDatabaseName.c_str(), aSrcDatabase, aSrcDatabaseName.c_str())
{
}
Backup::Backup(Database &aDestDatabase, Database &aSrcDatabase) :
Backup(aDestDatabase, "main", aSrcDatabase, "main")
{
}
// Release resource for SQLite database backup
Backup::~Backup()
{
if (mpSQLiteBackup)
{
sqlite3_backup_finish(mpSQLiteBackup);
}
}
// Execute backup step with a given number of source pages to be copied
int Backup::executeStep(const int aNumPage /* = -1 */)
{
const int res = sqlite3_backup_step(mpSQLiteBackup, aNumPage);
if (SQLITE_OK != res && SQLITE_DONE != res && SQLITE_BUSY != res && SQLITE_LOCKED != res)
{
throw SQLite::Exception(sqlite3_errstr(res), res);
}
return res;
}
// Get the number of remaining source pages to be copied in this backup process
int Backup::getRemainingPageCount()
{
return sqlite3_backup_remaining(mpSQLiteBackup);
}
// Get the number of total source pages to be copied in this backup process
int Backup::getTotalPageCount()
{
return sqlite3_backup_pagecount(mpSQLiteBackup);
}
} // namespace SQLite
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