added XrmDatabaseHelper.hh

src/XrmDatabaseHelper.hh

@@ -0,0 +1,56 @@
+// XrmDatabaseHelper.hh
+// Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+// This is a helper for XrmDatabase
+// when database goes out of scope
+// the XrmDatabase variable will be destroyed.
+
+#ifndef _XRMDATABASEHELPER_HH_
+#define _XRMDATABASEHELPER_HH_
+
+#include <X11/Xresource.h>
+
+class XrmDatabaseHelper
+{
+public:
+	XrmDatabaseHelper(char const * filename=0)
+	: m_database(filename == 0 ? 0 : XrmGetFileDatabase(filename))
+	{ }
+	
+	~XrmDatabaseHelper() {
+		if (m_database!=0)
+			XrmDestroyDatabase(m_database);
+	}
+	
+	XrmDatabaseHelper& operator=(const XrmDatabase& database) {
+		if (m_database!=0)
+			XrmDestroyDatabase(m_database);
+		m_database = database; 
+		return *this;
+	}
+	bool operator == (const XrmDatabase& database) { return m_database == database; }
+	XrmDatabase & operator*(void) {	return m_database; }
+
+private:
+	XrmDatabase m_database;	
+};
+
+#endif //_XRMDATABASEHELPER_HH_