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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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..

use crate::io::{self, IoSlice, IoSliceMut};
use crate::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, RawFd};
use crate::sys::fd::FileDesc;
use crate::sys::unsupported::unsupported;
use crate::sys_common::IntoInner;

pub struct AnonPipe(FileDesc);

pub fn anon_pipe() -> io::Result<(AnonPipe, AnonPipe)> {
    unsupported()
}

impl AnonPipe {
    pub fn read(&self, _buf: &mut [u8]) -> io::Result<usize> {
        unsupported()
    }

    pub fn read_vectored(&self, _bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
        unsupported()
    }

    pub fn is_read_vectored(&self) -> bool {
        false
    }

    pub fn write(&self, _buf: &[u8]) -> io::Result<usize> {
        unsupported()
    }

    pub fn write_vectored(&self, _bufs: &[IoSlice<'_>]) -> io::Result<usize> {
        unsupported()
    }

    pub fn is_write_vectored(&self) -> bool {
        false
    }
}

impl IntoInner<FileDesc> for AnonPipe {
    fn into_inner(self) -> FileDesc {
        self.0
    }
}

#[allow(clippy::ptr_arg)]
pub fn read2(_p1: AnonPipe, _v1: &mut Vec<u8>, _p2: AnonPipe, _v2: &mut Vec<u8>) -> io::Result<()> {
    unsupported()
}

impl AsRawFd for AnonPipe {
    fn as_raw_fd(&self) -> RawFd {
        self.0.as_raw_fd()
    }
}

impl AsFd for AnonPipe {
    fn as_fd(&self) -> BorrowedFd<'_> {
        self.0.as_fd()
    }
}

impl IntoRawFd for AnonPipe {
    fn into_raw_fd(self) -> RawFd {
        self.0.into_raw_fd()
    }
}

impl FromRawFd for AnonPipe {
    unsafe fn from_raw_fd(raw_fd: RawFd) -> Self {
        Self(FromRawFd::from_raw_fd(raw_fd))
    }
}