sources/network/bytestream.h

/*
	Copyright 2014 - 2021 Teemu Piippo
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:

	1. Redistributions of source code must retain the above copyright
	   notice, this list of conditions and the following disclaimer.
	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.
	3. Neither the name of the copyright holder nor the names of its
	   contributors may be used to endorse or promote products derived from
	   this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
	TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
	PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
	OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#pragma once
#include <stdexcept>
#include <string>
#include "../main.h"
BEGIN_ZFC_NAMESPACE

enum
{
	MAX_NETWORK_STRING = 0x800
};

class IOError : public std::exception
{
	std::string m_message;

public:
	IOError(std::string message) :
		m_message(message) {}

	const char* what() const throw()
	{
		return m_message.data();
	}
};

class Bytestream
{
public:
	Bytestream(std::vector<unsigned char>& data);

	int bytesLeft() const;
	std::vector<unsigned char>::iterator getCurrentIterator();
	int position() const;
	std::vector<unsigned char> readBuffer(int length);
	int8_t readByte();
	int32_t readLong();
	int16_t readShort();
	std::string readString();
	float readFloat();
	void rewind();
	void seek(int position);
	void write(const unsigned char* val, unsigned int length);
	void writeBuffer(const std::vector<unsigned char>& other);
	void writeByte(int8_t value);
	void writeDouble(double val);
	void writeFloat(float value);
	void writeLong(int32_t value);
	void writeShort(int16_t value);
	void writeString(const std::string& string);

private:
	std::vector<unsigned char>& m_data;
	int m_position;

	int8_t read();
	void ensureReadSpace(int bytes);
};

END_ZFC_NAMESPACE