1 files changed, 128 insertions, 0 deletions
diff --git a/kfile-plugins/torrent/bstring.cpp b/kfile-plugins/torrent/bstring.cpp
new file mode 100644
index 00000000..b888af72
--- /dev/null
+++ b/kfile-plugins/torrent/bstring.cpp
@@ -0,0 +1,128 @@
+/*
+ * 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.
+ */
+#include <qcstring.h>
+#include <qiodevice.h>
+
+#include <kdebug.h>
+
+#include "bstring.h"
+#include "bytetape.h"
+
+BString::BString (QByteArray &dict, int start) :
+    m_data(), m_valid(false)
+{
+    ByteTape tape (dict, start);
+    init (tape);
+}
+
+BString::BString (ByteTape &tape)
+    : m_data(), m_valid(false)
+{
+    init (tape);
+}
+
+// The reason we don't store stuff in a QString is because BitTorrent
+// b-encoded strings may contain zeroes within the string, which makes
+// a BString more of a buffer than a true string.
+void BString::init (ByteTape &tape)
+{
+    QByteArray &dict(tape.data());
+
+    if (dict.find(':', tape.pos()) == -1)
+    {
+        kdDebug(7034) << "Can't find : for string!" << endl;
+        return;
+    }
+
+    // Copy the part from start to :, as it will be a number
+    // That number is the number of characters to read
+    int length = dict.find(':', tape.pos()) - tape.pos();
+    char *ptr = dict.data();
+
+    ptr += tape.pos();
+
+    QByteArray buffer (length + 1);
+    qmemmove (buffer.data(), ptr, length);
+    buffer[length] = 0;
+
+    QString numberString (buffer);
+    bool a_isValid;
+    ulong len = numberString.toULong (&a_isValid);
+
+    if (!a_isValid)
+    {
+        kdDebug(7034) << "Invalid string length!" << endl;
+        return;
+    }
+
+    // Now that we have the length, we need to advance the tape
+    // past the colon
+    tape += length; // Move to colon
+    if (*tape != ':')
+    {
+        // Sanity check
+        kdError(7034) << "SANITY CHECK FAILED. *tape != ':'!" << endl;
+        return;
+    }
+
+    tape++; // Move past colon
+
+    // Time to copy the data
+    char *textBuffer = tape.at(tape.pos());
+    if (!m_data.resize(len + 1))
+        return;
+
+    qmemmove (m_data.data(), textBuffer, len);
+    m_data[len] = 0; // Null terminate for convienience
+
+    tape += len;
+    m_valid = true;
+}
+
+BString::~BString ()
+{
+}
+
+bool BString::writeToDevice(QIODevice &device)
+{
+    if (!m_valid)
+        return false;
+
+    QString str = QString("%1:").
+        arg(get_len());
+
+    QCString utfString = str.utf8();
+
+    /* Don't write null terminator */
+    device.writeBlock (utfString.data(), utfString.size() - 1);
+
+    // Output the actual data
+    device.writeBlock (m_data.data(), m_data.size() - 1);
+
+    // Done
+    return true;
+}
+
+bool BString::setValue (const QString &str)
+{
+    m_data = str.utf8();
+    return true;
+}
+
+// vim: set et ts=4 sw=4: