ntr-core 0.0.1

Idiomatic NT APIs on Rust (core)
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use core::fmt::{self, Display};

use windows::core::HRESULT;

pub type WindowsError = windows::core::Error;

#[derive(Debug)]
pub enum Error {
    #[cfg(feature = "std")]
    Io(std::io::Error),
    #[cfg(not(feature = "std"))]
    Io(core::convert::Infallible),

    Windows(windows::core::Error),
}

impl Error {
    pub fn from_os_code(rc: i32) -> Self {
        Self::Windows(WindowsError::from_hresult(HRESULT(rc)))
    }
}

impl Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::Io(e) => write!(f, "i/o error: {}", e),
            Self::Windows(e) => write!(f, "windows error: {}", e),
        }
    }
}

impl core::error::Error for Error {}

#[cfg(feature = "std")]
impl From<std::io::Error> for Error {
    fn from(error: std::io::Error) -> Self {
        Self::Io(error)
    }
}

impl From<windows::core::Error> for Error {
    fn from(error: windows::core::Error) -> Self {
        Self::Windows(error)
    }
}