/***************************************************************************
 *   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.             *
 ***************************************************************************/

#include "bencoder.h"
#include <util/file.h>
#include <QByteArray>
#include <QIODevice>

namespace bt
{
	

	BEncoderFileOutput::BEncoderFileOutput(File* fptr) : fptr(fptr)
	{
	}

	void BEncoderFileOutput::write(const char* str,Uint32 len)
	{
		if (fptr)
			fptr->write(str,len);
	}
	
	////////////////////////////////////
	
	BEncoderBufferOutput::BEncoderBufferOutput(QByteArray & data) : data(data),ptr(0)
	{
	}

	void BEncoderBufferOutput::write(const char* str,Uint32 len)
	{
		if (ptr + len > (Uint32)data.size())
			data.resize(ptr + len);
		
		for (Uint32 i = 0;i < len;i++)
			data[ptr++] = str[i];
	}
	
	////////////////////////////////////
	
	
	BEncoderIODeviceOutput::BEncoderIODeviceOutput(QIODevice* dev) : dev(dev)
	{
	}

	void BEncoderIODeviceOutput::write(const char* str, Uint32 len)
	{
		dev->write(str,len);
	}


	////////////////////////////////////

	BEncoder::BEncoder(File* fptr) : out(0),del(true)
	{
		out = new BEncoderFileOutput(fptr);
	}

	BEncoder::BEncoder(BEncoderOutput* out) : out(out),del(true)
	{
	}

	BEncoder::BEncoder(QIODevice* dev) : out(0),del(true)
	{
		out = new BEncoderIODeviceOutput(dev);
	}


	BEncoder::~BEncoder()
	{
		if (del)
			delete out;
	}

	void BEncoder::beginDict()
	{
		if (!out) return;
		
		out->write("d",1);
	}
	
	void BEncoder::beginList()
	{
		if (!out) return;
		
		out->write("l",1);
	}
	
	void BEncoder::write(bool val)
	{
		if (!out) return;
		
		QByteArray s = QStringLiteral("i%1e").arg(val ? 1 : 0).toUtf8();
		out->write(s.constData(), s.length());
	}
	
	void BEncoder::write(float val)
	{
		if (!out) return;
		
		write(QByteArray::number(val,'f'));
	}
	
	void BEncoder::write(Uint32 val)
	{
		if (!out) return;
		
		QByteArray s = QStringLiteral("i%1e").arg(val).toUtf8();
		out->write(s.constData(), s.length());
	}

	void BEncoder::write(Uint64 val)
	{
		if (!out) return;
		
		QByteArray s = QStringLiteral("i%1e").arg(val).toUtf8();
		out->write(s.constData(), s.length());
	}

	void BEncoder::write(const char* str)	        
	{
		if (!out) return;

		QByteArray s = QStringLiteral("%1:%2").arg(strlen(str)).arg(QString::fromUtf8(str)).toUtf8();
		out->write(s.constData(), s.length());
	}
	
	void BEncoder::write(const QByteArray & data)
	{
		if (!out) return;
		
		QByteArray s = QByteArray::number(data.size());
		out->write(s.constData(),s.length());
		out->write(":",1);
		out->write(data.constData(),data.size());
	}

	void BEncoder::write(const Uint8* data,Uint32 size)
	{
		if (!out) return;
		
		QByteArray s = QByteArray::number(size);
		out->write(s.constData(),s.length());
		out->write(":",1);
		out->write((const char*)data,size);
	}
	
	void BEncoder::end()
	{
		if (!out) return;
		
		out->write("e",1);
	}
}
