1 files changed, 91 insertions, 0 deletions
diff --git a/kfile-plugins/torrent/bbase.h b/kfile-plugins/torrent/bbase.h
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+/*
+ * Copyright (c) 2003, 2004 Michael Pyne <[email protected]>
+ *
+ * This software 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 software 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 library; see the file COPYING.
+ * If not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+#ifndef _BBASE_H
+#define _BBASE_H
+
+#include <ksharedptr.h>
+
+class QIODevice;
+
+/**
+ * Abstract base class for the b-encoded types.  Re-implemented
+ * by BInt, BList, BDict, and BString.  Derive from this class in
+ * order to make a new type for the b-encoding suite.  Classes
+ * derived from this one should not throw exceptions.  Instead,
+ * they should implement isValid(), and allow calling modules to
+ * check error status that way.
+ *
+ * @author Michael Pyne <[email protected]>
+ * @see BInt, BList, BDict, BString, KSharedPtr
+ */
+
+// Derive from KShared to enable use of KSharedPtr.
+class BBase : public KShared
+{
+    public:
+
+    /**
+     * Identifies the particular class that has been instantiated.  All
+     * subclasses of this class should have an identifier here.
+     */
+    enum classID { 
+        bBase,   /**< This class is BBase.  No subclass should return this. */
+        bString, /**< This class is a BString. */
+        bInt,    /**< This class is a BInt. */
+        bList,   /**< This class is a BList. */
+        bDict    /**< This class is a BDict. (Dictionary/Map) */
+    };
+
+    /**
+     * Returns the type identification of the object.  It will
+     * be a value in the classID enum.  A subclass of this class
+     * must implement this function.
+     *
+     * @return type identifier of the class
+     * @see classID
+     */
+    virtual classID type_id() const = 0;
+
+    /**
+     * Destructor for the class.  This function must be reimplemented
+     * in subclasses.
+     */
+    virtual ~BBase () { ; }
+
+    /**
+     * Returns the validity status of the object.  Newly constructed
+     * objects are invalid unless the initialization sequence completed
+     * successfully.
+     *
+     * @return the validity status of the object
+     */
+    virtual bool isValid() const = 0;
+    
+    /**
+     * Outputs the b-encoded representation of the object to the given
+     * QIODevice.
+     * @param device the QIODevice to write to
+     * @return true on a successful write, false otherwise
+     */
+    virtual bool writeToDevice (QIODevice &device) = 0;
+};
+
+#endif /* _BBASE_H */
+
+// vim: set et sw=4 ts=4: