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+/***************************************************************************
+ * Copyright (C) 2005 by Joris Guisson *
+ * joris.guisson@gmail.com *
+ * *
+ * This program 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 program 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 program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
+ ***************************************************************************/
+#ifndef BTBENCODER_H
+#define BTBENCODER_H
+
+
+#include <util/file.h>
+
+
+namespace bt
+{
+ class File;
+
+ /**
+ * @author Joris Guisson
+ *
+ * Interface for classes which wish to receive the output from a BEncoder.
+ */
+ class BEncoderOutput
+ {
+ public:
+ virtual ~BEncoderOutput() {}
+ /**
+ * Write a string of characters.
+ * @param str The string
+ * @param len The length of the string
+ */
+ virtual void write(const char* str,Uint32 len) = 0;
+ };
+
+ /**
+ * Writes the output of a bencoder to a file
+ */
+ class BEncoderFileOutput : public BEncoderOutput
+ {
+ File* fptr;
+ public:
+ BEncoderFileOutput(File* fptr);
+
+ void write(const char* str,Uint32 len);
+ };
+
+ /**
+ * Write the output of a BEncoder to a QByteArray
+ */
+ class BEncoderBufferOutput : public BEncoderOutput
+ {
+ QByteArray & data;
+ Uint32 ptr;
+ public:
+ BEncoderBufferOutput(QByteArray & data);
+
+ void write(const char* str,Uint32 len);
+ };
+
+
+ /**
+ * @author Joris Guisson
+ * @brief Helper class to b-encode stuff.
+ *
+ * This class b-encodes data. For more details about b-encoding, see
+ * the BitTorrent protocol docs. The data gets written to a BEncoderOutput
+ * thing.
+ */
+ class BEncoder
+ {
+ BEncoderOutput* out;
+ bool del;
+ public:
+ /**
+ * Constructor, output gets written to a file.
+ * @param fptr The File to write to
+ */
+ BEncoder(File* fptr);
+
+
+ /**
+ * Constructor, output gets written to a BEncoderOutput object.
+ * @param out The BEncoderOutput
+ */
+ BEncoder(BEncoderOutput* out);
+ virtual ~BEncoder();
+
+ /**
+ * Begin a dictionary.Should have a corresponding end call.
+ */
+ void beginDict();
+
+ /**
+ * Begin a list. Should have a corresponding end call.
+ */
+ void beginList();
+
+ /**
+ * Write an int
+ * @param val
+ */
+ void write(Uint32 val);
+
+ /**
+ * Write an int64
+ * @param val
+ */
+ void write(Uint64 val);
+
+ /**
+ * Write a string
+ * @param str
+ */
+ void write(const QString & str);
+
+ /**
+ * Write a QByteArray
+ * @param data
+ */
+ void write(const QByteArray & data);
+
+ /**
+ * Write a data array
+ * @param data
+ * @param size of data
+ */
+ void write(const Uint8* data,Uint32 size);
+
+ /**
+ * End a beginDict or beginList call.
+ */
+ void end();
+ };
+
+}
+
+#endif