PrismLauncher/libraries/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;
};
}