// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_COMPAT_H
#define BITCOIN_COMPAT_H

#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif

#include <type_traits>

// GCC 4.8 is missing some C++11 type_traits,
// https://www.gnu.org/software/gcc/gcc-5/changes.html
#if defined(__GNUC__) && __GNUC__ < 5
#define IS_TRIVIALLY_CONSTRUCTIBLE std::is_trivial
#else
#define IS_TRIVIALLY_CONSTRUCTIBLE std::is_trivially_constructible
#endif

#ifdef WIN32
#ifdef _WIN32_WINNT
#undef _WIN32_WINNT
#endif
#define _WIN32_WINNT 0x0501
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif
#ifndef NOMINMAX
#define NOMINMAX
#endif
#ifdef FD_SETSIZE
#undef FD_SETSIZE // prevent redefinition compiler warning
#endif
#define FD_SETSIZE 1024 // max number of fds in fd_set

#include <winsock2.h>     // Must be included before mswsock.h and windows.h

#include <mswsock.h>
#include <windows.h>
#include <ws2tcpip.h>
#include <stdint.h>
#else
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <ifaddrs.h>
#include <limits.h>
#include <netdb.h>
#include <unistd.h>
#endif

#ifndef WIN32
typedef unsigned int SOCKET;
#include <errno.h>
#define WSAGetLastError()   errno
#define WSAEINVAL           EINVAL
#define WSAEALREADY         EALREADY
#define WSAEWOULDBLOCK      EWOULDBLOCK
#define WSAEMSGSIZE         EMSGSIZE
#define WSAEINTR            EINTR
#define WSAEINPROGRESS      EINPROGRESS
#define WSAEADDRINUSE       EADDRINUSE
#define WSAENOTSOCK         EBADF
#define INVALID_SOCKET      (SOCKET)(~0)
#define SOCKET_ERROR        -1
#endif

#ifdef WIN32
#ifndef S_IRUSR
#define S_IRUSR             0400
#define S_IWUSR             0200
#endif
#else
#define MAX_PATH            1024
#endif
#ifdef _MSC_VER
#if !defined(ssize_t)
#ifdef _WIN64
typedef int64_t ssize_t;
#else
typedef int32_t ssize_t;
#endif
#endif
#endif

#if HAVE_DECL_STRNLEN == 0
size_t strnlen( const char *start, size_t max_len);
#endif // HAVE_DECL_STRNLEN

#ifndef WIN32
typedef void* sockopt_arg_type;
#else
typedef char* sockopt_arg_type;
#endif

bool static inline IsSelectableSocket(const SOCKET& s) {
#ifdef WIN32
    return true;
#else
    return (s < FD_SETSIZE);
#endif
}

#endif // BITCOIN_COMPAT_H