working test

thirdparty/SQLiteCpp/src/Backup.cpp

@@ -0,0 +1,104 @@
+/**
+ * @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 (shibaohong@outlook.com)
+ * Copyright (c) 2015-2019 Sebastien Rombauts (sebastien.rombauts@gmail.com)
+ *
+ * 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(NULL)
+{
+    mpSQLiteBackup = sqlite3_backup_init(aDestDatabase.getHandle(),
+                                         apDestDatabaseName,
+                                         aSrcDatabase.getHandle(),
+                                         apSrcDatabaseName);
+    if (NULL == mpSQLiteBackup)
+    {
+        // If an error occurs, the error code and message are attached to the destination database connection.
+        throw SQLite::Exception(aDestDatabase.getHandle());
+    }
+}
+
+// Initialize resource for SQLite database backup
+Backup::Backup(Database&            aDestDatabase,
+               const std::string&   aDestDatabaseName,
+               Database&            aSrcDatabase,
+               const std::string&   aSrcDatabaseName) :
+    mpSQLiteBackup(NULL)
+{
+    mpSQLiteBackup = sqlite3_backup_init(aDestDatabase.getHandle(),
+                                         aDestDatabaseName.c_str(),
+                                         aSrcDatabase.getHandle(),
+                                         aSrcDatabaseName.c_str());
+    if (NULL == mpSQLiteBackup)
+    {
+        // If an error occurs, the error code and message are attached to the destination database connection.
+        throw SQLite::Exception(aDestDatabase.getHandle());
+    }
+}
+
+// Initialize resource for SQLite database backup
+Backup::Backup(Database &aDestDatabase, Database &aSrcDatabase) :
+    mpSQLiteBackup(NULL)
+{
+    mpSQLiteBackup = sqlite3_backup_init(aDestDatabase.getHandle(),
+                                         "main",
+                                         aSrcDatabase.getHandle(),
+                                         "main");
+    if (NULL == mpSQLiteBackup)
+    {
+        // If an error occurs, the error code and message are attached to the destination database connection.
+        throw SQLite::Exception(aDestDatabase.getHandle());
+    }
+}
+
+// Release resource for SQLite database backup
+Backup::~Backup()
+{
+    if (NULL != 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