Base64: realize decode() as template function

In Base64::decode() we mess around with pointers so it's more type-safe
to realize everything as a template function. This also silences compiler
warning about dereferencing type-punned pointer in Vibed plugin.
(cherry picked from commit 81cea79c38)

include/base64.h

@@ -2,8 +2,8 @@
  * base64.h - namespace base64 with methods for encoding/decoding binary data
  *            to/from base64
  *
- * Copyright (c) 2006-2008 Tobias Doerffel <tobydox/at/users.sourceforge.net>
- * 
+ * Copyright (c) 2006-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
+ *
  * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
  *
  * This program is free software; you can redistribute it and/or
@@ -23,7 +23,6 @@
  *
  */
 
-
 #ifndef _BASE64_H
 #define _BASE64_H
 
@@ -40,11 +39,12 @@ namespace base64
 		_dst = QByteArray( _data, _size ).toBase64();
 	}
 
-	inline void decode( const QString & _b64, char * * _data, int * _size )
+	template<class T>
+	inline void decode( const QString & _b64, T * * _data, int * _size )
 	{
-		QByteArray data = QByteArray::fromBase64( _b64.toAscii() );
+		QByteArray data = QByteArray::fromBase64( _b64.toUtf8() );
 		*_size = data.size();
-		*_data = new char[*_size];
+		*_data = new T[*_size / sizeof(T)];
 		memcpy( *_data, data.constData(), *_size );
 	}
 	// deprecated!!

plugins/vibed/vibed.cpp

@@ -241,7 +241,7 @@ void vibed::loadSettings( const QDomElement & _this )
 			float * shp = 0;
 			base64::decode( _this.attribute( "graph" +
 						QString::number( i ) ),
-						(char * *) &shp,
+						&shp,
 						&size );
 			// TODO: check whether size == 128 * sizeof( float ),
 			// otherwise me might and up in a segfault