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/* SPDX-FileCopyrightText: 2026 Project Tick
* SPDX-FileContributor: Project Tick
* SPDX-License-Identifier: GPL-3.0-or-later
*
* MeshMC - A Custom Launcher for Minecraft
* Copyright (C) 2026 Project Tick
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#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;
};
}
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