
/*
 * Copyright 2011-2022 Cuberite Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Globals.h

// This file gets included from every module in the project, so that global symbols may be introduced easily
// Also used for precompiled header generation in MSVC environments





// Compiler-dependent stuff:
#if defined(_MSC_VER)
	// MSVC produces warning C4481 on the override keyword usage, so disable the warning altogether
	#pragma warning(disable:4481)

	// Disable some warnings that we don't care about:
	#pragma warning(disable:4100)

#elif defined(__GNUC__)

	// TODO: Can GCC explicitly mark classes as abstract (no instances can be created)?
	#define abstract

#else

	#error "You are using an unsupported compiler, you might need to #define some stuff here for your compiler"

#endif





#ifndef TOLUA_TEMPLATE_BIND
	#define TOLUA_TEMPLATE_BIND(x)
#endif





// Integral types with predefined sizes:
typedef long long Int64;
typedef int       Int32;
typedef short     Int16;

typedef unsigned long long UInt64;
typedef unsigned int       UInt32;
typedef unsigned short     UInt16;

typedef unsigned char Byte;





// A macro to disallow the copy constructor and operator= functions
// This should be used in the private: declarations for any class that shouldn't allow copying itself
#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
	TypeName(const TypeName &); \
	void operator=(const TypeName &)

// A macro that is used to mark unused function parameters, to avoid pedantic warnings in gcc
#define UNUSED(X) (void)(X)




// OS-dependent stuff:
#ifdef _WIN32
	#define WIN32_LEAN_AND_MEAN
	#include <Windows.h>
	#include <winsock2.h>
	#include <ws2tcpip.h>

	// Windows SDK defines min and max macros, messing up with our std::min and std::max usage
	#undef min
	#undef max

	// Windows SDK defines GetFreeSpace as a constant, probably a Win16 API remnant
	#ifdef GetFreeSpace
		#undef GetFreeSpace
	#endif  // GetFreeSpace

	#define SocketError WSAGetLastError()
#else
	#include <sys/types.h>
	#include <sys/stat.h>   // for mkdir
	#include <sys/time.h>
	#include <sys/socket.h>
	#include <netinet/in.h>
	#include <arpa/inet.h>
	#include <netdb.h>
	#include <dirent.h>
	#include <iostream>
	#include <unistd.h>

	#include <cstring>
	#include <pthread.h>
	#include <semaphore.h>
	#include <cerrno>
	#include <fcntl.h>

	typedef int SOCKET;
	enum
	{
		INVALID_SOCKET = -1,
	};
	#define closesocket close
	#define SocketError errno
#endif





// CRT stuff:
#include <cassert>
#include <cstdio>
#include <cmath>
#include <cstdarg>
#include <ctime>
#include <cstddef>





// STL stuff:
#include <vector>
#include <list>
#include <deque>
#include <string>
#include <map>
#include <algorithm>
#include <memory>
#include <atomic>
#include <mutex>
#include <thread>
#include <condition_variable>




// Common headers (without macros):
#include "fmt.h"
#include "StringUtils.h"





// Common definitions:

/** Evaluates to the number of elements in an array (compile-time!) */
#define ARRAYCOUNT(X) (sizeof(X) / sizeof(*(X)))

/** Allows arithmetic expressions like "32 KiB" (but consider using parenthesis around it, "(32 KiB)") */
#define KiB * 1024
#define MiB * 1024 * 1024

/** Faster than (int)floorf((float)x / (float)div) */
#define FAST_FLOOR_DIV(x, div) ((x) < 0 ? (((int)x / div) - 1) : ((int)x / div))

/** Own version of assert() that writes failed assertions to the log for review */
#ifdef  NDEBUG
	#define ASSERT(x) ((void)0)
#else
	#define ASSERT assert
#endif

// Pretty much the same as ASSERT() but stays in Release builds
#define VERIFY(x) (!!(x) || (LOGERROR("Verification failed: %s, file %s, line %i", #x, __FILE__, __LINE__), exit(1), 0))





/** Clamp X to the specified range. */
template <typename T>
T Clamp(T a_Value, T a_Min, T a_Max)
{
	return (a_Value < a_Min) ? a_Min : ((a_Value > a_Max) ? a_Max : a_Value);
}

template <typename T>
auto ToUnsigned(T a_Val)
{
	ASSERT(a_Val >= 0);
	return static_cast<std::make_unsigned_t<T>>(a_Val);
}

