subcomponent 0.1.0

/*
 * Copyright (c) 2016 Jean Guyomarc'h
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

extern crate libc;

/*
 *
 * The following code is taken from Cargo (src/cargo/lib.rs)
 *
 */

#[allow(dead_code)]
pub enum Output {
    Stdout,
    Stderr,
}

#[cfg(unix)]
pub fn isatty(output: &Output) -> bool {
    let fd = match *output {
        Output::Stdout => libc::STDOUT_FILENO,
        Output::Stderr => libc::STDERR_FILENO,
    };

    unsafe { libc::isatty(fd) != 0 }
}

#[cfg(windows)]
pub fn isatty(output: &Output) -> bool {
    extern crate kernel32;
    extern crate winapi;

    let handle = match *output {
        Output::Stdout => winapi::winbase::STD_OUTPUT_HANDLE,
        Output::Stderr => winapi::winbase::STD_ERROR_HANDLE,
    };

    unsafe {
        let handle = kernel32::GetStdHandle(handle);
        let mut out = 0;
        kernel32::GetConsoleMode(handle, &mut out) != 0
    }
}