pollymc/depends/classparser/src/membuffer.h

#pragma once
#include <stdint.h>
#include <string>
#include <vector>
#include <exception>
#include "javaendian.h"

namespace util
{
class membuffer
{
public:
	membuffer(char *buffer, std::size_t size)
	{
		current = start = buffer;
		end = start + size;
	}
	~membuffer()
	{
		// maybe? possibly? left out to avoid confusion. for now.
		// delete start;
	}
	/**
		* Read some value. That's all ;)
		*/
	template <class T> void read(T &val)
	{
		val = *(T *)current;
		current += sizeof(T);
	}
	/**
		* Read a big-endian number
		* valid for 2-byte, 4-byte and 8-byte variables
		*/
	template <class T> void read_be(T &val)
	{
		val = util::bigswap(*(T *)current);
		current += sizeof(T);
	}
	/**
		* Read a string in the format:
		* 2B length (big endian, unsigned)
		* length bytes data
		*/
	void read_jstr(std::string &str)
	{
		uint16_t length = 0;
		read_be(length);
		str.append(current, length);
		current += length;
	}
	/**
		* Skip N bytes
		*/
	void skip(std::size_t N)
	{
		current += N;
	}

private:
	char *start, *end, *current;
};
}