mirror of
https://github.com/MeexReay/minceraftOS.git
synced 2025-06-25 19:12:59 +03:00
94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
/*
|
|
* libnbt++ - A library for the Minecraft Named Binary Tag format.
|
|
* Copyright (C) 2013, 2015 ljfa-ag
|
|
*
|
|
* This file is part of libnbt++.
|
|
*
|
|
* libnbt++ is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* libnbt++ 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with libnbt++. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef IZLIBSTREAM_H_INCLUDED
|
|
#define IZLIBSTREAM_H_INCLUDED
|
|
|
|
#include "io/zlib_streambuf.h"
|
|
#include <istream>
|
|
#include <zlib.h>
|
|
|
|
namespace zlib
|
|
{
|
|
|
|
/**
|
|
* @brief Stream buffer used by zlib::izlibstream
|
|
* @sa izlibstream
|
|
*/
|
|
class NBT_EXPORT inflate_streambuf : public zlib_streambuf
|
|
{
|
|
public:
|
|
/**
|
|
* @param input the istream to wrap
|
|
* @param bufsize the size of the internal buffers
|
|
* @param window_bits the base two logarithm of the maximum window size that
|
|
* zlib will use.
|
|
* This parameter also determines which type of input to expect.
|
|
* The default argument will autodetect between zlib and gzip data.
|
|
* Refer to the zlib documentation of inflateInit2 for more details.
|
|
*
|
|
* @throw zlib_error if zlib encounters a problem during initialization
|
|
*/
|
|
explicit inflate_streambuf(std::istream& input, size_t bufsize = 32768, int window_bits = 32 + 15);
|
|
~inflate_streambuf() noexcept;
|
|
|
|
///@return the wrapped istream
|
|
std::istream& get_istr() const { return is; }
|
|
|
|
private:
|
|
std::istream& is;
|
|
bool stream_end;
|
|
|
|
int_type underflow() override;
|
|
};
|
|
|
|
/**
|
|
* @brief An istream adapter that decompresses data using zlib
|
|
*
|
|
* This istream wraps another istream. The izlibstream will read compressed
|
|
* data from the wrapped istream and inflate (decompress) it with zlib.
|
|
*
|
|
* @note If you want to read more data from the wrapped istream after the end
|
|
* of the compressed data, then it must allow seeking. It is unavoidable for
|
|
* the izlibstream to consume more data after the compressed data.
|
|
* It will automatically attempt to seek the wrapped istream back to the point
|
|
* after the end of the compressed data.
|
|
* @sa inflate_streambuf
|
|
*/
|
|
class NBT_EXPORT izlibstream : public std::istream
|
|
{
|
|
public:
|
|
/**
|
|
* @param input the istream to wrap
|
|
* @param bufsize the size of the internal buffers
|
|
*/
|
|
explicit izlibstream(std::istream& input, size_t bufsize = 32768):
|
|
std::istream(&buf), buf(input, bufsize)
|
|
{}
|
|
///@return the wrapped istream
|
|
std::istream& get_istr() const { return buf.get_istr(); }
|
|
|
|
private:
|
|
inflate_streambuf buf;
|
|
};
|
|
|
|
}
|
|
|
|
#endif // IZLIBSTREAM_H_INCLUDED
|