/*
 * SPDX-FileCopyrightText: 2013, 2015 ljfa-ag <ljfa-ag@web.de>
 *
 * SPDX-License-Identifier: LGPL-3.0-or-later
 */

#ifndef ZLIB_STREAMBUF_H_INCLUDED
#define ZLIB_STREAMBUF_H_INCLUDED

#include <stdexcept>
#include <streambuf>
#include <vector>
#include <zlib.h>
#include "nbt_export.h"

namespace zlib
{

	/// Exception thrown in case zlib encounters a problem
	class NBT_EXPORT zlib_error : public std::runtime_error
	{
	  public:
		const int errcode;

		zlib_error(const char* msg, int errcode)
			: std::runtime_error(msg ? std::string(zError(errcode)) + ": " + msg
									 : zError(errcode)),
			  errcode(errcode)
		{
		}
	};

	/// Base class for deflate_streambuf and inflate_streambuf
	class zlib_streambuf : public std::streambuf
	{
	  protected:
		std::vector<char> in;
		std::vector<char> out;
		z_stream zstr;

		explicit zlib_streambuf(size_t bufsize) : in(bufsize), out(bufsize)
		{
			zstr.zalloc = Z_NULL;
			zstr.zfree = Z_NULL;
			zstr.opaque = Z_NULL;
		}
	};

} // namespace zlib

#endif // ZLIB_STREAMBUF_H_INCLUDED