const freebsd = @import("index.zig");
const socklen_t = freebsd.socklen_t;
const iovec = freebsd.iovec;

pub const SYS_sbrk = 69;

pub const O_CREAT = 0o100;
pub const O_EXCL = 0o200;
pub const O_NOCTTY = 0o400;
pub const O_TRUNC = 0o1000;
pub const O_APPEND = 0o2000;
pub const O_NONBLOCK = 0o4000;
pub const O_DSYNC = 0o10000;
pub const O_SYNC = 0o4010000;
pub const O_RSYNC = 0o4010000;
pub const O_DIRECTORY = 0o200000;
pub const O_NOFOLLOW = 0o400000;
pub const O_CLOEXEC = 0o2000000;

pub const O_ASYNC = 0o20000;
pub const O_DIRECT = 0o40000;
pub const O_LARGEFILE = 0;
pub const O_NOATIME = 0o1000000;
pub const O_PATH = 0o10000000;
pub const O_TMPFILE = 0o20200000;
pub const O_NDELAY = O_NONBLOCK;

pub const F_DUPFD = 0;
pub const F_GETFD = 1;
pub const F_SETFD = 2;
pub const F_GETFL = 3;
pub const F_SETFL = 4;

pub const F_SETOWN = 8;
pub const F_GETOWN = 9;
pub const F_SETSIG = 10;
pub const F_GETSIG = 11;

pub const F_GETLK = 5;
pub const F_SETLK = 6;
pub const F_SETLKW = 7;

pub const F_SETOWN_EX = 15;
pub const F_GETOWN_EX = 16;

pub const F_GETOWNER_UIDS = 17;

pub fn syscall0(number: usize) usize {
    return asm volatile ("syscall"
        : [ret] "={rax}" (-> usize)
        : [number] "{rax}" (number)
        : "rcx", "r11"
    );
}

pub fn syscall1(number: usize, arg1: usize) usize {
    return asm volatile ("syscall"
        : [ret] "={rax}" (-> usize)
        : [number] "{rax}" (number),
          [arg1] "{rdi}" (arg1)
        : "rcx", "r11"
    );
}

pub fn syscall2(number: usize, arg1: usize, arg2: usize) usize {
    return asm volatile ("syscall"
        : [ret] "={rax}" (-> usize)
        : [number] "{rax}" (number),
          [arg1] "{rdi}" (arg1),
          [arg2] "{rsi}" (arg2)
        : "rcx", "r11"
    );
}

pub fn syscall3(number: usize, arg1: usize, arg2: usize, arg3: usize) usize {
    return asm volatile ("syscall"
        : [ret] "={rax}" (-> usize)
        : [number] "{rax}" (number),
          [arg1] "{rdi}" (arg1),
          [arg2] "{rsi}" (arg2),
          [arg3] "{rdx}" (arg3)
        : "rcx", "r11"
    );
}

pub fn syscall4(number: usize, arg1: usize, arg2: usize, arg3: usize, arg4: usize) usize {
    return asm volatile ("syscall"
        : [ret] "={rax}" (-> usize)
        : [number] "{rax}" (number),
          [arg1] "{rdi}" (arg1),
          [arg2] "{rsi}" (arg2),
          [arg3] "{rdx}" (arg3),
          [arg4] "{r10}" (arg4)
        : "rcx", "r11"
    );
}

pub fn syscall5(number: usize, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) usize {
    return asm volatile ("syscall"
        : [ret] "={rax}" (-> usize)
        : [number] "{rax}" (number),
          [arg1] "{rdi}" (arg1),
          [arg2] "{rsi}" (arg2),
          [arg3] "{rdx}" (arg3),
          [arg4] "{r10}" (arg4),
          [arg5] "{r8}" (arg5)
        : "rcx", "r11"
    );
}

pub fn syscall6(
    number: usize,
    arg1: usize,
    arg2: usize,
    arg3: usize,
    arg4: usize,
    arg5: usize,
    arg6: usize,
) usize {
    return asm volatile ("syscall"
        : [ret] "={rax}" (-> usize)
        : [number] "{rax}" (number),
          [arg1] "{rdi}" (arg1),
          [arg2] "{rsi}" (arg2),
          [arg3] "{rdx}" (arg3),
          [arg4] "{r10}" (arg4),
          [arg5] "{r8}" (arg5),
          [arg6] "{r9}" (arg6)
        : "rcx", "r11"
    );
}

pub nakedcc fn restore_rt() void {
    asm volatile ("syscall"
        :
        : [number] "{rax}" (usize(SYS_rt_sigreturn))
        : "rcx", "r11"
    );
}

pub const msghdr = extern struct.{
    msg_name: &u8,
    msg_namelen: socklen_t,
    msg_iov: &iovec,
    msg_iovlen: i32,
    __pad1: i32,
    msg_control: &u8,
    msg_controllen: socklen_t,
    __pad2: socklen_t,
    msg_flags: i32,
};

/// Renamed to Stat to not conflict with the stat function.
pub const Stat = extern struct.{
    dev: u64,
    ino: u64,
    nlink: usize,

    mode: u32,
    uid: u32,
    gid: u32,
    __pad0: u32,
    rdev: u64,
    size: i64,
    blksize: isize,
    blocks: i64,

    atim: timespec,
    mtim: timespec,
    ctim: timespec,
    __unused: [3]isize,
};

pub const timespec = extern struct.{
    tv_sec: isize,
    tv_nsec: isize,
};