lib/sqlite/Database: wrapper for `sqlite3*`

src/lib/sqlite/Database.cxx

+/*
+ * Copyright 2003-2019 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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 "Database.hxx"
+#include "Error.hxx"
+#include "util/StringFormat.hxx"
+
+namespace Sqlite {
+
+Database::Database(const char *path)
+{
+	int result = sqlite3_open(path, &db);
+	if (result != SQLITE_OK)
+		throw SqliteError(db, result,
+				  StringFormat<1024>("Failed to open sqlite database '%s'",
+						     path));
+}
+
+} // namespace Sqlite

src/lib/sqlite/Database.hxx

+/*
+ * Copyright 2003-2019 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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.
+ */
+
+#ifndef MPD_SQLITE_DATABASE_HXX
+#define MPD_SQLITE_DATABASE_HXX
+
+#include <sqlite3.h>
+
+#include <utility>
+
+namespace Sqlite {
+
+class Database {
+	sqlite3 *db = nullptr;
+
+public:
+	Database() = default;
+
+	explicit Database(const char *path);
+
+	~Database() noexcept {
+		if (db != nullptr)
+			sqlite3_close(db);
+	}
+
+	Database(Database &&src) noexcept
+		:db(std::exchange(src.db, nullptr)) {}
+
+	Database &operator=(Database &&src) noexcept {
+		using std::swap;
+		swap(db, src.db);
+		return *this;
+	}
+
+	operator sqlite3 *() const noexcept {
+		return db;
+	}
+};
+
+} // namespace Sqlite
+
+#endif

src/lib/sqlite/meson.build

@@ -6,6 +6,7 @@ endif
 
 sqlite = static_library(
   'sqlite',
+  'Database.cxx',
   'Error.cxx',
   include_directories: inc,
   dependencies: [

src/sticker/Database.cxx

@@ -82,21 +82,12 @@ static const char sticker_sql_create[] =
 	"";
 
 StickerDatabase::StickerDatabase(Path path)
+	:db(path.c_str())
 {
 	assert(!path.IsNull());
 
 	int ret;
 
-	/* open/create the sqlite database */
-
-	ret = sqlite3_open(path.c_str(), &db);
-	if (ret != SQLITE_OK) {
-		const std::string utf8 = path.ToUTF8();
-		throw SqliteError(db, ret,
-				  ("Failed to open sqlite database '" +
-				   utf8 + "'").c_str());
-	}
-
 	/* create the table and index */
 
 	ret = sqlite3_exec(db, sticker_sql_create,
@@ -123,8 +114,6 @@ StickerDatabase::~StickerDatabase() noexcept
 
 		sqlite3_finalize(stmt[i]);
 	}
-
-	sqlite3_close(db);
 }
 
 std::string

src/sticker/Database.hxx

@@ -43,6 +43,7 @@
 #define MPD_STICKER_DATABASE_HXX
 
 #include "Match.hxx"
+#include "lib/sqlite/Database.hxx"
 #include "util/Compiler.h"
 
 #include <sqlite3.h>
@@ -69,7 +70,7 @@ class StickerDatabase {
 		  SQL_COUNT
 	};
 
-	sqlite3 *db;
+	Sqlite::Database db;
 	sqlite3_stmt *stmt[SQL_COUNT];
 
 public: