1 files changed, 158 insertions, 0 deletions
diff --git a/kfile-plugins/torrent/bytetape.cpp b/kfile-plugins/torrent/bytetape.cpp
new file mode 100644
index 00000000..f2289293
--- /dev/null
+++ b/kfile-plugins/torrent/bytetape.cpp
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2003, 2004 Michael Pyne <michael.pyne@kdemail.net>
+ *
+ * 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.
+ */
+
+#include <kdebug.h>
+
+#include "bytetape.h"
+
+ByteTape::ByteTape (QByteArray &array, int pos)
+    : m_array(array), m_shared(new ByteTapeShared)
+{
+    m_shared->pos = pos;
+}
+
+ByteTape::ByteTape (const ByteTape &tape)
+    : m_array(tape.m_array), m_shared(tape.m_shared)
+{
+}
+
+ByteTape& ByteTape::operator += (const unsigned int i)
+{
+    m_shared->pos += i;
+    if (m_array.size() <= m_shared->pos)
+    {
+        kdDebug(7034) << "Whoops.  Advanced too far." << endl;
+        m_shared->pos = m_array.size() - 1;
+    }
+    
+    return *this;
+}
+
+ByteTape& ByteTape::operator -= (const unsigned int i)
+{
+    if (i > m_shared->pos)
+    {
+        kdDebug(7034) << "Whoops, tried to back up too far." << endl;
+        m_shared->pos = 0;
+    }
+    else
+        m_shared->pos -= i;
+    
+    return *this;
+}
+
+char ByteTape::operator [] (const unsigned int i)
+{
+    if (i < m_array.size())
+        return m_array[i];
+    else
+    {
+        kdWarning() << "Can't dereference tape at " << i
+                    << ", size is " << m_array.size() << endl;
+        return 0;
+    }
+}
+
+char &ByteTape::operator * ()
+{
+    return m_array[m_shared->pos];
+}
+
+// Postfix increment
+ByteTape ByteTape::operator ++ (int)
+{
+    // Can't use copy ctor, as we'll be copying shared data, which defeats
+    // the semantics of the postfix operator.
+    ByteTape temp(m_array, m_shared->pos);
+    m_shared->pos ++;
+
+    if (m_shared->pos >= m_array.size())
+    {
+        m_shared->pos = m_array.size() - 1;
+        kdDebug(7034) << "Tape already at end!" << endl;
+        kdDebug(7034) << "Tape size is " << m_array.size() << endl;
+    }
+    
+    return temp;
+}
+
+// Prefix increment
+ByteTape & ByteTape::operator ++()
+{
+    m_shared->pos ++;
+    if (m_shared->pos >= m_array.size())
+    {
+        m_shared->pos = m_array.size() - 1;
+        kdDebug(7034) << "Tape already at end!" << endl;
+        kdDebug(7034) << "Tape size is " << m_array.size() << endl;
+    }
+    
+    return *this;
+}
+
+// Postfix decrement
+ByteTape ByteTape::operator -- (int)
+{
+    // Can't use copy ctor, as we'll be copying shared data, which defeats
+    // the semantics of the postfix operator.
+    ByteTape temp(m_array, m_shared->pos);
+
+    if (m_shared->pos != 0)
+        m_shared->pos --;
+    else
+        kdDebug(7034) << "Tape already at beginning!" << endl;
+    
+    return temp;
+}
+
+// Prefix decrement
+ByteTape & ByteTape::operator -- ()
+{
+    if (m_shared->pos != 0)
+        m_shared->pos --;
+    else
+        kdDebug(7034) << "Tape already at beginning!" << endl;
+    
+    return *this;
+}
+
+bool ByteTape::setPos (unsigned int pos)
+{
+    if (pos >= m_array.size())
+    {
+        kdDebug(7034) << "Can't set tape to " << pos << endl;
+        return false;
+    }
+
+    m_shared->pos = pos;
+    return true;
+}
+
+char* ByteTape::at (const unsigned int i)
+{
+    if (i >= m_array.size())
+    {
+        kdDebug(7034) << "Access to tape at " << i << " out-of-range." << endl;
+        return 0;
+    }
+        
+    return m_array.data() + i;
+}
+
+// vim: set et ts=4 sw=4: