const std = @import("std");
const builtin = @import("builtin");
const wasi = std.os.wasi;
const linux = std.os.linux;
const iovec = std.posix.iovec;
const iovec_const = std.posix.iovec_const;
const c = std.c;

// TODO: go through this file and delete all the bits that are identical to linux because they can
// be merged in the std.c namespace.

pub const FILE = c.FILE;

pub const PF = linux.PF;
pub const AF = linux.AF;
pub const CLOCK = linux.CLOCK;

pub const CPU_SETSIZE = 128;
pub const cpu_set_t = [CPU_SETSIZE / @sizeOf(usize)]usize;
pub const cpu_count_t = std.meta.Int(.unsigned, std.math.log2(CPU_SETSIZE * 8));

pub fn CPU_COUNT(set: cpu_set_t) cpu_count_t {
    var sum: cpu_count_t = 0;
    for (set) |x| {
        sum += @popCount(x);
    }
    return sum;
}

pub const E = enum(u16) {
    SUCCESS = @intFromEnum(wasi.errno_t.SUCCESS),
    @"2BIG" = @intFromEnum(wasi.errno_t.@"2BIG"),
    ACCES = @intFromEnum(wasi.errno_t.ACCES),
    ADDRINUSE = @intFromEnum(wasi.errno_t.ADDRINUSE),
    ADDRNOTAVAIL = @intFromEnum(wasi.errno_t.ADDRNOTAVAIL),
    AFNOSUPPORT = @intFromEnum(wasi.errno_t.AFNOSUPPORT),
    /// This is also the error code used for `WOULDBLOCK`.
    AGAIN = @intFromEnum(wasi.errno_t.AGAIN),
    ALREADY = @intFromEnum(wasi.errno_t.ALREADY),
    BADF = @intFromEnum(wasi.errno_t.BADF),
    BADMSG = @intFromEnum(wasi.errno_t.BADMSG),
    BUSY = @intFromEnum(wasi.errno_t.BUSY),
    CANCELED = @intFromEnum(wasi.errno_t.CANCELED),
    CHILD = @intFromEnum(wasi.errno_t.CHILD),
    CONNABORTED = @intFromEnum(wasi.errno_t.CONNABORTED),
    CONNREFUSED = @intFromEnum(wasi.errno_t.CONNREFUSED),
    CONNRESET = @intFromEnum(wasi.errno_t.CONNRESET),
    DEADLK = @intFromEnum(wasi.errno_t.DEADLK),
    DESTADDRREQ = @intFromEnum(wasi.errno_t.DESTADDRREQ),
    DOM = @intFromEnum(wasi.errno_t.DOM),
    DQUOT = @intFromEnum(wasi.errno_t.DQUOT),
    EXIST = @intFromEnum(wasi.errno_t.EXIST),
    FAULT = @intFromEnum(wasi.errno_t.FAULT),
    FBIG = @intFromEnum(wasi.errno_t.FBIG),
    HOSTUNREACH = @intFromEnum(wasi.errno_t.HOSTUNREACH),
    IDRM = @intFromEnum(wasi.errno_t.IDRM),
    ILSEQ = @intFromEnum(wasi.errno_t.ILSEQ),
    INPROGRESS = @intFromEnum(wasi.errno_t.INPROGRESS),
    INTR = @intFromEnum(wasi.errno_t.INTR),
    INVAL = @intFromEnum(wasi.errno_t.INVAL),
    IO = @intFromEnum(wasi.errno_t.IO),
    ISCONN = @intFromEnum(wasi.errno_t.ISCONN),
    ISDIR = @intFromEnum(wasi.errno_t.ISDIR),
    LOOP = @intFromEnum(wasi.errno_t.LOOP),
    MFILE = @intFromEnum(wasi.errno_t.MFILE),
    MLINK = @intFromEnum(wasi.errno_t.MLINK),
    MSGSIZE = @intFromEnum(wasi.errno_t.MSGSIZE),
    MULTIHOP = @intFromEnum(wasi.errno_t.MULTIHOP),
    NAMETOOLONG = @intFromEnum(wasi.errno_t.NAMETOOLONG),
    NETDOWN = @intFromEnum(wasi.errno_t.NETDOWN),
    NETRESET = @intFromEnum(wasi.errno_t.NETRESET),
    NETUNREACH = @intFromEnum(wasi.errno_t.NETUNREACH),
    NFILE = @intFromEnum(wasi.errno_t.NFILE),
    NOBUFS = @intFromEnum(wasi.errno_t.NOBUFS),
    NODEV = @intFromEnum(wasi.errno_t.NODEV),
    NOENT = @intFromEnum(wasi.errno_t.NOENT),
    NOEXEC = @intFromEnum(wasi.errno_t.NOEXEC),
    NOLCK = @intFromEnum(wasi.errno_t.NOLCK),
    NOLINK = @intFromEnum(wasi.errno_t.NOLINK),
    NOMEM = @intFromEnum(wasi.errno_t.NOMEM),
    NOMSG = @intFromEnum(wasi.errno_t.NOMSG),
    NOPROTOOPT = @intFromEnum(wasi.errno_t.NOPROTOOPT),
    NOSPC = @intFromEnum(wasi.errno_t.NOSPC),
    NOSYS = @intFromEnum(wasi.errno_t.NOSYS),
    NOTCONN = @intFromEnum(wasi.errno_t.NOTCONN),
    NOTDIR = @intFromEnum(wasi.errno_t.NOTDIR),
    NOTEMPTY = @intFromEnum(wasi.errno_t.NOTEMPTY),
    NOTRECOVERABLE = @intFromEnum(wasi.errno_t.NOTRECOVERABLE),
    NOTSOCK = @intFromEnum(wasi.errno_t.NOTSOCK),
    /// This is also the code used for `NOTSUP`.
    OPNOTSUPP = @intFromEnum(wasi.errno_t.OPNOTSUPP),
    NOTTY = @intFromEnum(wasi.errno_t.NOTTY),
    NXIO = @intFromEnum(wasi.errno_t.NXIO),
    OVERFLOW = @intFromEnum(wasi.errno_t.OVERFLOW),
    OWNERDEAD = @intFromEnum(wasi.errno_t.OWNERDEAD),
    PERM = @intFromEnum(wasi.errno_t.PERM),
    PIPE = @intFromEnum(wasi.errno_t.PIPE),
    PROTO = @intFromEnum(wasi.errno_t.PROTO),
    PROTONOSUPPORT = @intFromEnum(wasi.errno_t.PROTONOSUPPORT),
    PROTOTYPE = @intFromEnum(wasi.errno_t.PROTOTYPE),
    RANGE = @intFromEnum(wasi.errno_t.RANGE),
    ROFS = @intFromEnum(wasi.errno_t.ROFS),
    SPIPE = @intFromEnum(wasi.errno_t.SPIPE),
    SRCH = @intFromEnum(wasi.errno_t.SRCH),
    STALE = @intFromEnum(wasi.errno_t.STALE),
    TIMEDOUT = @intFromEnum(wasi.errno_t.TIMEDOUT),
    TXTBSY = @intFromEnum(wasi.errno_t.TXTBSY),
    XDEV = @intFromEnum(wasi.errno_t.XDEV),
    NOTCAPABLE = @intFromEnum(wasi.errno_t.NOTCAPABLE),

    ENOSTR = 100,
    EBFONT = 101,
    EBADSLT = 102,
    EBADRQC = 103,
    ENOANO = 104,
    ENOTBLK = 105,
    ECHRNG = 106,
    EL3HLT = 107,
    EL3RST = 108,
    ELNRNG = 109,
    EUNATCH = 110,
    ENOCSI = 111,
    EL2HLT = 112,
    EBADE = 113,
    EBADR = 114,
    EXFULL = 115,
    ENODATA = 116,
    ETIME = 117,
    ENOSR = 118,
    ENONET = 119,
    ENOPKG = 120,
    EREMOTE = 121,
    EADV = 122,
    ESRMNT = 123,
    ECOMM = 124,
    EDOTDOT = 125,
    ENOTUNIQ = 126,
    EBADFD = 127,
    EREMCHG = 128,
    ELIBACC = 129,
    ELIBBAD = 130,
    ELIBSCN = 131,
    ELIBMAX = 132,
    ELIBEXEC = 133,
    ERESTART = 134,
    ESTRPIPE = 135,
    EUSERS = 136,
    ESOCKTNOSUPPORT = 137,
    EOPNOTSUPP = 138,
    EPFNOSUPPORT = 139,
    ESHUTDOWN = 140,
    ETOOMANYREFS = 141,
    EHOSTDOWN = 142,
    EUCLEAN = 143,
    ENOTNAM = 144,
    ENAVAIL = 145,
    EISNAM = 146,
    EREMOTEIO = 147,
    ENOMEDIUM = 148,
    EMEDIUMTYPE = 149,
    ENOKEY = 150,
    EKEYEXPIRED = 151,
    EKEYREVOKED = 152,
    EKEYREJECTED = 153,
    ERFKILL = 154,
    EHWPOISON = 155,
    EL2NSYNC = 156,
    _,
};

pub const F = struct {
    pub const DUPFD = 0;
    pub const GETFD = 1;
    pub const SETFD = 2;
    pub const GETFL = 3;
    pub const SETFL = 4;
    pub const SETOWN = 8;
    pub const GETOWN = 9;
    pub const SETSIG = 10;
    pub const GETSIG = 11;
    pub const GETLK = 12;
    pub const SETLK = 13;
    pub const SETLKW = 14;
    pub const SETOWN_EX = 15;
    pub const GETOWN_EX = 16;
    pub const GETOWNER_UIDS = 17;

    pub const RDLCK = 0;
    pub const WRLCK = 1;
    pub const UNLCK = 2;
};

pub const FD_CLOEXEC = 1;

pub const F_OK = 0;
pub const X_OK = 1;
pub const W_OK = 2;
pub const R_OK = 4;

pub const W = struct {
    pub const NOHANG = 1;
    pub const UNTRACED = 2;
    pub const STOPPED = 2;
    pub const EXITED = 4;
    pub const CONTINUED = 8;
    pub const NOWAIT = 0x1000000;

    pub fn EXITSTATUS(s: u32) u8 {
        return @as(u8, @intCast((s & 0xff00) >> 8));
    }
    pub fn TERMSIG(s: u32) SIG {
        return @enumFromInt(s & 0x7f);
    }
    pub fn STOPSIG(s: u32) u32 {
        return @enumFromInt(EXITSTATUS(s));
    }
    pub fn IFEXITED(s: u32) bool {
        return (s & 0x7f) == 0;
    }
    pub fn IFSTOPPED(s: u32) bool {
        return @as(u16, @truncate(((s & 0xffff) *% 0x10001) >> 8)) > 0x7f00;
    }
    pub fn IFSIGNALED(s: u32) bool {
        return (s & 0xffff) -% 1 < 0xff;
    }
};

pub const Flock = extern struct {
    type: i16,
    whence: i16,
    start: off_t,
    len: off_t,
    pid: pid_t,
};

pub const IFNAMESIZE = 16;

pub const NAME_MAX = 255;
pub const PATH_MAX = 4096;
pub const IOV_MAX = 1024;

pub const IPPORT_RESERVED = 1024;

pub const IPPROTO = linux.IPPROTO;

pub const LOCK = struct {
    pub const SH = 1;
    pub const EX = 2;
    pub const NB = 4;
    pub const UN = 8;
};

pub const MADV = struct {
    pub const NORMAL = 0;
    pub const RANDOM = 1;
    pub const SEQUENTIAL = 2;
    pub const WILLNEED = 3;
    pub const DONTNEED = 4;
    pub const FREE = 8;
    pub const REMOVE = 9;
    pub const DONTFORK = 10;
    pub const DOFORK = 11;
    pub const MERGEABLE = 12;
    pub const UNMERGEABLE = 13;
    pub const HUGEPAGE = 14;
    pub const NOHUGEPAGE = 15;
    pub const DONTDUMP = 16;
    pub const DODUMP = 17;
    pub const WIPEONFORK = 18;
    pub const KEEPONFORK = 19;
    pub const COLD = 20;
    pub const PAGEOUT = 21;
    pub const HWPOISON = 100;
    pub const SOFT_OFFLINE = 101;
};

pub const MSF = struct {
    pub const ASYNC = 1;
    pub const INVALIDATE = 2;
    pub const SYNC = 4;
};

pub const MSG = struct {
    pub const OOB = 0x0001;
    pub const PEEK = 0x0002;
    pub const DONTROUTE = 0x0004;
    pub const CTRUNC = 0x0008;
    pub const PROXY = 0x0010;
    pub const TRUNC = 0x0020;
    pub const DONTWAIT = 0x0040;
    pub const EOR = 0x0080;
    pub const WAITALL = 0x0100;
    pub const FIN = 0x0200;
    pub const SYN = 0x0400;
    pub const CONFIRM = 0x0800;
    pub const RST = 0x1000;
    pub const ERRQUEUE = 0x2000;
    pub const NOSIGNAL = 0x4000;
    pub const MORE = 0x8000;
    pub const WAITFORONE = 0x10000;
    pub const BATCH = 0x40000;
    pub const ZEROCOPY = 0x4000000;
    pub const FASTOPEN = 0x20000000;
    pub const CMSG_CLOEXEC = 0x40000000;
};

pub const POLL = struct {
    pub const IN = 0x001;
    pub const PRI = 0x002;
    pub const OUT = 0x004;
    pub const ERR = 0x008;
    pub const HUP = 0x010;
    pub const NVAL = 0x020;
    pub const RDNORM = 0x040;
    pub const RDBAND = 0x080;
};

pub const PROT = packed struct(u32) {
    READ: bool = false,
    WRITE: bool = false,
    EXEC: bool = false,
    _: u21 = 0,
    GROWSDOWN: bool = false,
    GROWSUP: bool = false,
    __: u6 = 0,
};

pub const rlim_t = u64;

pub const RLIM = struct {
    pub const INFINITY = ~@as(rlim_t, 0);

    pub const SAVED_MAX = INFINITY;
    pub const SAVED_CUR = INFINITY;
};

pub const rlimit = c.rlimit;

pub const rlimit_resource = enum(c_int) {
    CPU,
    FSIZE,
    DATA,
    STACK,
    CORE,
    RSS,
    NPROC,
    NOFILE,
    MEMLOCK,
    AS,
    LOCKS,
    SIGPENDING,
    MSGQUEUE,
    NICE,
    RTPRIO,
    RTTIME,
    _,
};

pub const rusage = extern struct {
    utime: timeval,
    stime: timeval,
    maxrss: isize,
    ixrss: isize,
    idrss: isize,
    isrss: isize,
    minflt: isize,
    majflt: isize,
    nswap: isize,
    inblock: isize,
    oublock: isize,
    msgsnd: isize,
    msgrcv: isize,
    nsignals: isize,
    nvcsw: isize,
    nivcsw: isize,
    __reserved: [16]isize = [1]isize{0} ** 16,

    pub const SELF = 0;
    pub const CHILDREN = -1;
    pub const THREAD = 1;
};

pub const timeval = extern struct {
    sec: i64,
    usec: i32,
};

pub const S = struct {
    pub const IFMT = 0o170000;

    pub const IFDIR = 0o040000;
    pub const IFCHR = 0o020000;
    pub const IFBLK = 0o060000;
    pub const IFREG = 0o100000;
    pub const IFIFO = 0o010000;
    pub const IFLNK = 0o120000;
    pub const IFSOCK = 0o140000;

    pub const ISUID = 0o4000;
    pub const ISGID = 0o2000;
    pub const ISVTX = 0o1000;
    pub const IRUSR = 0o400;
    pub const IWUSR = 0o200;
    pub const IXUSR = 0o100;
    pub const IRWXU = 0o700;
    pub const IRGRP = 0o040;
    pub const IWGRP = 0o020;
    pub const IXGRP = 0o010;
    pub const IRWXG = 0o070;
    pub const IROTH = 0o004;
    pub const IWOTH = 0o002;
    pub const IXOTH = 0o001;
    pub const IRWXO = 0o007;

    pub fn ISREG(m: mode_t) bool {
        return m & IFMT == IFREG;
    }

    pub fn ISDIR(m: mode_t) bool {
        return m & IFMT == IFDIR;
    }

    pub fn ISCHR(m: mode_t) bool {
        return m & IFMT == IFCHR;
    }

    pub fn ISBLK(m: mode_t) bool {
        return m & IFMT == IFBLK;
    }

    pub fn ISFIFO(m: mode_t) bool {
        return m & IFMT == IFIFO;
    }

    pub fn ISLNK(m: mode_t) bool {
        return m & IFMT == IFLNK;
    }

    pub fn ISSOCK(m: mode_t) bool {
        return m & IFMT == IFSOCK;
    }
};

pub const SA = struct {
    pub const NOCLDSTOP = 1;
    pub const NOCLDWAIT = 2;
    pub const SIGINFO = 4;
    pub const RESTART = 0x10000000;
    pub const RESETHAND = 0x80000000;
    pub const ONSTACK = 0x08000000;
    pub const NODEFER = 0x40000000;
    pub const RESTORER = 0x04000000;
};

pub const SEEK = struct {
    pub const SET = 0;
    pub const CUR = 1;
    pub const END = 2;
};

pub const SHUT = struct {
    pub const RD = 0;
    pub const WR = 1;
    pub const RDWR = 2;
};

pub const SIG = linux.SIG;

pub const Sigaction = extern struct {
    pub const handler_fn = *align(1) const fn (i32) callconv(.c) void;
    pub const sigaction_fn = *const fn (i32, *const siginfo_t, ?*anyopaque) callconv(.c) void;

    handler: extern union {
        handler: ?handler_fn,
        sigaction: ?sigaction_fn,
    },
    mask: sigset_t,
    flags: c_uint,
    restorer: ?*const fn () callconv(.c) void = null,
};

pub const sigset_t = [1024 / 32]u32;
pub fn sigemptyset() sigset_t {
    return [_]u32{0} ** @typeInfo(sigset_t).array.len;
}
pub const siginfo_t = extern struct {
    signo: i32,
    errno: i32,
    code: i32,
    fields: siginfo_fields_union,
};
const siginfo_fields_union = extern union {
    pad: [128 - 2 * @sizeOf(c_int) - @sizeOf(c_long)]u8,
    common: extern struct {
        first: extern union {
            piduid: extern struct {
                pid: pid_t,
                uid: uid_t,
            },
            timer: extern struct {
                timerid: i32,
                overrun: i32,
            },
        },
        second: extern union {
            value: sigval,
            sigchld: extern struct {
                status: i32,
                utime: clock_t,
                stime: clock_t,
            },
        },
    },
    sigfault: extern struct {
        addr: *allowzero anyopaque,
        addr_lsb: i16,
        first: extern union {
            addr_bnd: extern struct {
                lower: *anyopaque,
                upper: *anyopaque,
            },
            pkey: u32,
        },
    },
    sigpoll: extern struct {
        band: isize,
        fd: i32,
    },
    sigsys: extern struct {
        call_addr: *anyopaque,
        syscall: i32,
        native_arch: u32,
    },
};
pub const sigval = extern union {
    int: i32,
    ptr: *anyopaque,
};

pub const SIOCGIFINDEX = 0x8933;

pub const SO = struct {
    pub const DEBUG = 1;
    pub const REUSEADDR = 2;
    pub const TYPE = 3;
    pub const ERROR = 4;
    pub const DONTROUTE = 5;
    pub const BROADCAST = 6;
    pub const SNDBUF = 7;
    pub const RCVBUF = 8;
    pub const KEEPALIVE = 9;
    pub const OOBINLINE = 10;
    pub const NO_CHECK = 11;
    pub const PRIORITY = 12;
    pub const LINGER = 13;
    pub const BSDCOMPAT = 14;
    pub const REUSEPORT = 15;
    pub const PASSCRED = 16;
    pub const PEERCRED = 17;
    pub const RCVLOWAT = 18;
    pub const SNDLOWAT = 19;
    pub const RCVTIMEO = 20;
    pub const SNDTIMEO = 21;
    pub const ACCEPTCONN = 30;
    pub const PEERSEC = 31;
    pub const SNDBUFFORCE = 32;
    pub const RCVBUFFORCE = 33;
    pub const PROTOCOL = 38;
    pub const DOMAIN = 39;
    pub const SECURITY_AUTHENTICATION = 22;
    pub const SECURITY_ENCRYPTION_TRANSPORT = 23;
    pub const SECURITY_ENCRYPTION_NETWORK = 24;
    pub const BINDTODEVICE = 25;
    pub const ATTACH_FILTER = 26;
    pub const DETACH_FILTER = 27;
    pub const GET_FILTER = ATTACH_FILTER;
    pub const PEERNAME = 28;
    pub const TIMESTAMP_OLD = 29;
    pub const PASSSEC = 34;
    pub const TIMESTAMPNS_OLD = 35;
    pub const MARK = 36;
    pub const TIMESTAMPING_OLD = 37;
    pub const RXQ_OVFL = 40;
    pub const WIFI_STATUS = 41;
    pub const PEEK_OFF = 42;
    pub const NOFCS = 43;
    pub const LOCK_FILTER = 44;
    pub const SELECT_ERR_QUEUE = 45;
    pub const BUSY_POLL = 46;
    pub const MAX_PACING_RATE = 47;
    pub const BPF_EXTENSIONS = 48;
    pub const INCOMING_CPU = 49;
    pub const ATTACH_BPF = 50;
    pub const DETACH_BPF = DETACH_FILTER;
    pub const ATTACH_REUSEPORT_CBPF = 51;
    pub const ATTACH_REUSEPORT_EBPF = 52;
    pub const CNX_ADVICE = 53;
    pub const MEMINFO = 55;
    pub const INCOMING_NAPI_ID = 56;
    pub const COOKIE = 57;
    pub const PEERGROUPS = 59;
    pub const ZEROCOPY = 60;
    pub const TXTIME = 61;
    pub const BINDTOIFINDEX = 62;
    pub const TIMESTAMP_NEW = 63;
    pub const TIMESTAMPNS_NEW = 64;
    pub const TIMESTAMPING_NEW = 65;
    pub const RCVTIMEO_NEW = 66;
    pub const SNDTIMEO_NEW = 67;
    pub const DETACH_REUSEPORT_BPF = 68;
};

pub const SOCK = struct {
    pub const STREAM = 1;
    pub const DGRAM = 2;
    pub const RAW = 3;
    pub const RDM = 4;
    pub const SEQPACKET = 5;
    pub const DCCP = 6;
    pub const PACKET = 10;
    pub const CLOEXEC = 0o2000000;
    pub const NONBLOCK = 0o4000;
};

pub const SOL = struct {
    pub const SOCKET = 1;

    pub const IP = 0;
    pub const IPV6 = 41;
    pub const ICMPV6 = 58;

    pub const RAW = 255;
    pub const DECNET = 261;
    pub const X25 = 262;
    pub const PACKET = 263;
    pub const ATM = 264;
    pub const AAL = 265;
    pub const IRDA = 266;
    pub const NETBEUI = 267;
    pub const LLC = 268;
    pub const DCCP = 269;
    pub const NETLINK = 270;
    pub const TIPC = 271;
    pub const RXRPC = 272;
    pub const PPPOL2TP = 273;
    pub const BLUETOOTH = 274;
    pub const PNPIPE = 275;
    pub const RDS = 276;
    pub const IUCV = 277;
    pub const CAIF = 278;
    pub const ALG = 279;
    pub const NFC = 280;
    pub const KCM = 281;
    pub const TLS = 282;
    pub const XDP = 283;
};

pub const STDIN_FILENO = 0;
pub const STDOUT_FILENO = 1;
pub const STDERR_FILENO = 2;

pub const TCP = struct {
    pub const NODELAY = 1;
    pub const MAXSEG = 2;
    pub const CORK = 3;
    pub const KEEPIDLE = 4;
    pub const KEEPINTVL = 5;
    pub const KEEPCNT = 6;
    pub const SYNCNT = 7;
    pub const LINGER2 = 8;
    pub const DEFER_ACCEPT = 9;
    pub const WINDOW_CLAMP = 10;
    pub const INFO = 11;
    pub const QUICKACK = 12;
    pub const CONGESTION = 13;
    pub const MD5SIG = 14;
    pub const THIN_LINEAR_TIMEOUTS = 16;
    pub const THIN_DUPACK = 17;
    pub const USER_TIMEOUT = 18;
    pub const REPAIR = 19;
    pub const REPAIR_QUEUE = 20;
    pub const QUEUE_SEQ = 21;
    pub const REPAIR_OPTIONS = 22;
    pub const FASTOPEN = 23;
    pub const TIMESTAMP = 24;
    pub const NOTSENT_LOWAT = 25;
    pub const CC_INFO = 26;
    pub const SAVE_SYN = 27;
    pub const SAVED_SYN = 28;
    pub const REPAIR_WINDOW = 29;
    pub const FASTOPEN_CONNECT = 30;
    pub const ULP = 31;
    pub const MD5SIG_EXT = 32;
    pub const FASTOPEN_KEY = 33;
    pub const FASTOPEN_NO_COOKIE = 34;
    pub const ZEROCOPY_RECEIVE = 35;
    pub const INQ = 36;
    pub const CM_INQ = INQ;
    pub const TX_DELAY = 37;

    pub const REPAIR_ON = 1;
    pub const REPAIR_OFF = 0;
    pub const REPAIR_OFF_NO_WP = -1;
};

pub const TCSA = std.posix.TCSA;
pub const addrinfo = c.addrinfo;

pub const in_port_t = c.in_port_t;
pub const sa_family_t = c.sa_family_t;
pub const socklen_t = c.socklen_t;
pub const sockaddr = c.sockaddr;

pub const blksize_t = i32;
pub const nlink_t = u32;
// https://github.com/emscripten-core/emscripten/blob/946ab574ae39401b51e75cd5257d894ae732ab54/system/lib/libc/musl/arch/emscripten/bits/alltypes.h#L140
pub const time_t = c_longlong;
pub const mode_t = u32;
pub const off_t = i64;
pub const ino_t = u64;
pub const dev_t = u32;
pub const blkcnt_t = i32;

pub const pid_t = i32;
pub const fd_t = c.fd_t;
pub const uid_t = u32;
pub const gid_t = u32;
pub const clock_t = i32;

pub const dl_phdr_info = extern struct {
    addr: usize,
    name: ?[*:0]const u8,
    phdr: [*]std.elf.Phdr,
    phnum: u16,
};

pub const msghdr = std.c.msghdr;
pub const msghdr_const = std.c.msghdr;

pub const nfds_t = usize;
pub const pollfd = extern struct {
    fd: fd_t,
    events: i16,
    revents: i16,
};

pub const stack_t = extern struct {
    sp: [*]u8,
    flags: i32,
    size: usize,
};

/// For use with `utimensat` and `futimens`.
// https://github.com/emscripten-core/emscripten/blob/d72d7226f4733af8ff993dec70198cf09a24142d/system/lib/libc/musl/include/sys/stat.h#L77-L78
pub const UTIME = struct {
    pub const NOW: timespec = .{ .sec = 0, .nsec = 0x3fffffff };
    pub const OMIT: timespec = .{ .sec = 0, .nsec = 0x3ffffffe };
};

// https://github.com/emscripten-core/emscripten/blob/946ab574ae39401b51e75cd5257d894ae732ab54/system/lib/libc/musl/arch/emscripten/bits/alltypes.h#L284
pub const timespec = extern struct {
    sec: time_t,
    nsec: c_long,
};

pub const timezone = extern struct {
    minuteswest: c_int,
    dsttime: c_int,
};

pub const utsname = extern struct {
    sysname: [64:0]u8,
    nodename: [64:0]u8,
    release: [64:0]u8,
    version: [64:0]u8,
    machine: [64:0]u8,
    domainname: [64:0]u8,
};

pub const Stat = extern struct {
    dev: dev_t,
    mode: mode_t,
    nlink: nlink_t,
    uid: uid_t,
    gid: gid_t,
    rdev: dev_t,
    size: off_t,
    blksize: blksize_t,
    blocks: blkcnt_t,
    atim: timespec,
    mtim: timespec,
    ctim: timespec,
    ino: ino_t,

    pub fn atime(self: @This()) timespec {
        return self.atim;
    }

    pub fn mtime(self: @This()) timespec {
        return self.mtim;
    }

    pub fn ctime(self: @This()) timespec {
        return self.ctim;
    }
};

pub const TIMING = struct {
    pub const SETTIMEOUT = 0;
    pub const RAF = 1;
    pub const SETIMMEDIATE = 2;
};

pub const LOG = struct {
    pub const CONSOLE = 1;
    pub const WARN = 2;
    pub const ERROR = 4;
    pub const C_STACK = 8;
    pub const JS_STACK = 16;
    pub const DEMANGLE = 32;
    pub const NO_PATHS = 64;
    pub const FUNC_PARAMS = 128;
    pub const DEBUG = 256;
    pub const INFO = 512;
};

pub const em_callback_func = ?*const fn () callconv(.c) void;
pub const em_arg_callback_func = ?*const fn (?*anyopaque) callconv(.c) void;
pub const em_str_callback_func = ?*const fn ([*:0]const u8) callconv(.c) void;

pub extern "c" fn emscripten_async_wget(url: [*:0]const u8, file: [*:0]const u8, onload: em_str_callback_func, onerror: em_str_callback_func) void;

pub const em_async_wget_onload_func = ?*const fn (?*anyopaque, ?*anyopaque, c_int) callconv(.c) void;
pub extern "c" fn emscripten_async_wget_data(url: [*:0]const u8, arg: ?*anyopaque, onload: em_async_wget_onload_func, onerror: em_arg_callback_func) void;

pub const em_async_wget2_onload_func = ?*const fn (c_uint, ?*anyopaque, [*:0]const u8) callconv(.c) void;
pub const em_async_wget2_onstatus_func = ?*const fn (c_uint, ?*anyopaque, c_int) callconv(.c) void;

pub extern "c" fn emscripten_async_wget2(url: [*:0]const u8, file: [*:0]const u8, requesttype: [*:0]const u8, param: [*:0]const u8, arg: ?*anyopaque, onload: em_async_wget2_onload_func, onerror: em_async_wget2_onstatus_func, onprogress: em_async_wget2_onstatus_func) c_int;

pub const em_async_wget2_data_onload_func = ?*const fn (c_uint, ?*anyopaque, ?*anyopaque, c_uint) callconv(.c) void;
pub const em_async_wget2_data_onerror_func = ?*const fn (c_uint, ?*anyopaque, c_int, [*:0]const u8) callconv(.c) void;
pub const em_async_wget2_data_onprogress_func = ?*const fn (c_uint, ?*anyopaque, c_int, c_int) callconv(.c) void;

pub extern "c" fn emscripten_async_wget2_data(url: [*:0]const u8, requesttype: [*:0]const u8, param: [*:0]const u8, arg: ?*anyopaque, free: c_int, onload: em_async_wget2_data_onload_func, onerror: em_async_wget2_data_onerror_func, onprogress: em_async_wget2_data_onprogress_func) c_int;
pub extern "c" fn emscripten_async_wget2_abort(handle: c_int) void;
pub extern "c" fn emscripten_wget(url: [*:0]const u8, file: [*:0]const u8) c_int;
pub extern "c" fn emscripten_wget_data(url: [*:0]const u8, pbuffer: *(?*anyopaque), pnum: *c_int, perror: *c_int) void;
pub extern "c" fn emscripten_run_script(script: [*:0]const u8) void;
pub extern "c" fn emscripten_run_script_int(script: [*:0]const u8) c_int;
pub extern "c" fn emscripten_run_script_string(script: [*:0]const u8) ?[*:0]u8;
pub extern "c" fn emscripten_async_run_script(script: [*:0]const u8, millis: c_int) void;
pub extern "c" fn emscripten_async_load_script(script: [*:0]const u8, onload: em_callback_func, onerror: em_callback_func) void;
pub extern "c" fn emscripten_set_main_loop(func: em_callback_func, fps: c_int, simulate_infinite_loop: c_int) void;
pub extern "c" fn emscripten_set_main_loop_timing(mode: c_int, value: c_int) c_int;
pub extern "c" fn emscripten_get_main_loop_timing(mode: *c_int, value: *c_int) void;
pub extern "c" fn emscripten_set_main_loop_arg(func: em_arg_callback_func, arg: ?*anyopaque, fps: c_int, simulate_infinite_loop: c_int) void;
pub extern "c" fn emscripten_pause_main_loop() void;
pub extern "c" fn emscripten_resume_main_loop() void;
pub extern "c" fn emscripten_cancel_main_loop() void;

pub const em_socket_callback = ?*const fn (c_int, ?*anyopaque) callconv(.c) void;
pub const em_socket_error_callback = ?*const fn (c_int, c_int, [*:0]const u8, ?*anyopaque) callconv(.c) void;

pub extern "c" fn emscripten_set_socket_error_callback(userData: ?*anyopaque, callback: em_socket_error_callback) void;
pub extern "c" fn emscripten_set_socket_open_callback(userData: ?*anyopaque, callback: em_socket_callback) void;
pub extern "c" fn emscripten_set_socket_listen_callback(userData: ?*anyopaque, callback: em_socket_callback) void;
pub extern "c" fn emscripten_set_socket_connection_callback(userData: ?*anyopaque, callback: em_socket_callback) void;
pub extern "c" fn emscripten_set_socket_message_callback(userData: ?*anyopaque, callback: em_socket_callback) void;
pub extern "c" fn emscripten_set_socket_close_callback(userData: ?*anyopaque, callback: em_socket_callback) void;
pub extern "c" fn _emscripten_push_main_loop_blocker(func: em_arg_callback_func, arg: ?*anyopaque, name: [*:0]const u8) void;
pub extern "c" fn _emscripten_push_uncounted_main_loop_blocker(func: em_arg_callback_func, arg: ?*anyopaque, name: [*:0]const u8) void;
pub extern "c" fn emscripten_set_main_loop_expected_blockers(num: c_int) void;
pub extern "c" fn emscripten_async_call(func: em_arg_callback_func, arg: ?*anyopaque, millis: c_int) void;
pub extern "c" fn emscripten_exit_with_live_runtime() noreturn;
pub extern "c" fn emscripten_force_exit(status: c_int) noreturn;
pub extern "c" fn emscripten_get_device_pixel_ratio() f64;
pub extern "c" fn emscripten_get_window_title() [*:0]u8;
pub extern "c" fn emscripten_set_window_title([*:0]const u8) void;
pub extern "c" fn emscripten_get_screen_size(width: *c_int, height: *c_int) void;
pub extern "c" fn emscripten_hide_mouse() void;
pub extern "c" fn emscripten_set_canvas_size(width: c_int, height: c_int) void;
pub extern "c" fn emscripten_get_canvas_size(width: *c_int, height: *c_int, isFullscreen: *c_int) void;
pub extern "c" fn emscripten_get_now() f64;
pub extern "c" fn emscripten_random() f32;
pub const em_idb_onload_func = ?*const fn (?*anyopaque, ?*anyopaque, c_int) callconv(.c) void;
pub extern "c" fn emscripten_idb_async_load(db_name: [*:0]const u8, file_id: [*:0]const u8, arg: ?*anyopaque, onload: em_idb_onload_func, onerror: em_arg_callback_func) void;
pub extern "c" fn emscripten_idb_async_store(db_name: [*:0]const u8, file_id: [*:0]const u8, ptr: ?*anyopaque, num: c_int, arg: ?*anyopaque, onstore: em_arg_callback_func, onerror: em_arg_callback_func) void;
pub extern "c" fn emscripten_idb_async_delete(db_name: [*:0]const u8, file_id: [*:0]const u8, arg: ?*anyopaque, ondelete: em_arg_callback_func, onerror: em_arg_callback_func) void;
pub const em_idb_exists_func = ?*const fn (?*anyopaque, c_int) callconv(.c) void;
pub extern "c" fn emscripten_idb_async_exists(db_name: [*:0]const u8, file_id: [*:0]const u8, arg: ?*anyopaque, oncheck: em_idb_exists_func, onerror: em_arg_callback_func) void;
pub extern "c" fn emscripten_idb_load(db_name: [*:0]const u8, file_id: [*:0]const u8, pbuffer: *?*anyopaque, pnum: *c_int, perror: *c_int) void;
pub extern "c" fn emscripten_idb_store(db_name: [*:0]const u8, file_id: [*:0]const u8, buffer: *anyopaque, num: c_int, perror: *c_int) void;
pub extern "c" fn emscripten_idb_delete(db_name: [*:0]const u8, file_id: [*:0]const u8, perror: *c_int) void;
pub extern "c" fn emscripten_idb_exists(db_name: [*:0]const u8, file_id: [*:0]const u8, pexists: *c_int, perror: *c_int) void;
pub extern "c" fn emscripten_idb_load_blob(db_name: [*:0]const u8, file_id: [*:0]const u8, pblob: *c_int, perror: *c_int) void;
pub extern "c" fn emscripten_idb_store_blob(db_name: [*:0]const u8, file_id: [*:0]const u8, buffer: *anyopaque, num: c_int, perror: *c_int) void;
pub extern "c" fn emscripten_idb_read_from_blob(blob: c_int, start: c_int, num: c_int, buffer: ?*anyopaque) void;
pub extern "c" fn emscripten_idb_free_blob(blob: c_int) void;
pub extern "c" fn emscripten_run_preload_plugins(file: [*:0]const u8, onload: em_str_callback_func, onerror: em_str_callback_func) c_int;
pub const em_run_preload_plugins_data_onload_func = ?*const fn (?*anyopaque, [*:0]const u8) callconv(.c) void;
pub extern "c" fn emscripten_run_preload_plugins_data(data: [*]u8, size: c_int, suffix: [*:0]const u8, arg: ?*anyopaque, onload: em_run_preload_plugins_data_onload_func, onerror: em_arg_callback_func) void;
pub extern "c" fn emscripten_lazy_load_code() void;
pub const worker_handle = c_int;
pub extern "c" fn emscripten_create_worker(url: [*:0]const u8) worker_handle;
pub extern "c" fn emscripten_destroy_worker(worker: worker_handle) void;
pub const em_worker_callback_func = ?*const fn ([*]u8, c_int, ?*anyopaque) callconv(.c) void;
pub extern "c" fn emscripten_call_worker(worker: worker_handle, funcname: [*:0]const u8, data: [*]u8, size: c_int, callback: em_worker_callback_func, arg: ?*anyopaque) void;
pub extern "c" fn emscripten_worker_respond(data: [*]u8, size: c_int) void;
pub extern "c" fn emscripten_worker_respond_provisionally(data: [*]u8, size: c_int) void;
pub extern "c" fn emscripten_get_worker_queue_size(worker: worker_handle) c_int;
pub extern "c" fn emscripten_get_compiler_setting(name: [*:0]const u8) c_long;
pub extern "c" fn emscripten_has_asyncify() c_int;
pub extern "c" fn emscripten_debugger() void;

pub extern "c" fn emscripten_get_preloaded_image_data(path: [*:0]const u8, w: *c_int, h: *c_int) ?[*]u8;
pub extern "c" fn emscripten_get_preloaded_image_data_from_FILE(file: *FILE, w: *c_int, h: *c_int) ?[*]u8;
pub extern "c" fn emscripten_log(flags: c_int, format: [*:0]const u8, ...) void;
pub extern "c" fn emscripten_get_callstack(flags: c_int, out: ?[*]u8, maxbytes: c_int) c_int;
pub extern "c" fn emscripten_print_double(x: f64, to: ?[*]u8, max: c_int) c_int;
pub const em_scan_func = ?*const fn (?*anyopaque, ?*anyopaque) callconv(.c) void;
pub extern "c" fn emscripten_scan_registers(func: em_scan_func) void;
pub extern "c" fn emscripten_scan_stack(func: em_scan_func) void;
pub const em_dlopen_callback = ?*const fn (?*anyopaque, ?*anyopaque) callconv(.c) void;
pub extern "c" fn emscripten_dlopen(filename: [*:0]const u8, flags: c_int, user_data: ?*anyopaque, onsuccess: em_dlopen_callback, onerror: em_arg_callback_func) void;
pub extern "c" fn emscripten_dlopen_promise(filename: [*:0]const u8, flags: c_int) em_promise_t;
pub extern "c" fn emscripten_throw_number(number: f64) void;
pub extern "c" fn emscripten_throw_string(utf8String: [*:0]const u8) void;
pub extern "c" fn emscripten_sleep(ms: c_uint) void;

pub const PROMISE = struct {
    pub const FULFILL = 0;
    pub const MATCH = 1;
    pub const MATCH_RELEASE = 2;
    pub const REJECT = 3;
};

pub const struct__em_promise = opaque {};
pub const em_promise_t = ?*struct__em_promise;
pub const enum_em_promise_result_t = c_uint;
pub const em_promise_result_t = enum_em_promise_result_t;
pub const em_promise_callback_t = ?*const fn (?*?*anyopaque, ?*anyopaque, ?*anyopaque) callconv(.c) em_promise_result_t;

pub extern "c" fn emscripten_promise_create() em_promise_t;
pub extern "c" fn emscripten_promise_destroy(promise: em_promise_t) void;
pub extern "c" fn emscripten_promise_resolve(promise: em_promise_t, result: em_promise_result_t, value: ?*anyopaque) void;
pub extern "c" fn emscripten_promise_then(promise: em_promise_t, on_fulfilled: em_promise_callback_t, on_rejected: em_promise_callback_t, data: ?*anyopaque) em_promise_t;
pub extern "c" fn emscripten_promise_all(promises: [*]em_promise_t, results: ?[*]?*anyopaque, num_promises: usize) em_promise_t;

pub const struct_em_settled_result_t = extern struct {
    result: em_promise_result_t,
    value: ?*anyopaque,
};
pub const em_settled_result_t = struct_em_settled_result_t;
