winapi-hash 0.1.3

Windows API hashing implementation
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use std::{
    ffi::{OsStr, OsString},
    os::windows::ffi::{OsStrExt, OsStringExt},
    path::PathBuf,
    slice::from_raw_parts,
};

pub trait ToWide {
    fn to_wide(&self) -> Vec<u16>;
    fn to_wide_null(&self) -> Vec<u16>;
}
impl<T> ToWide for T
where
    T: AsRef<OsStr>,
{
    #[inline]
    fn to_wide(&self) -> Vec<u16> {
        self.as_ref().encode_wide().collect()
    }
    #[inline]
    fn to_wide_null(&self) -> Vec<u16> {
        self.as_ref().encode_wide().chain(Some(0)).collect()
    }
}
pub trait FromWide
where
    Self: Sized,
{
    fn from_wide(wide: &[u16]) -> Self;
    #[inline]
    fn from_wide_null(wide: &[u16]) -> Self {
        let len = wide.iter().take_while(|&&c| c != 0).count();
        Self::from_wide(&wide[..len])
    }
    #[inline]
    unsafe fn from_wide_ptr(wide: *const u16, len: usize) -> Self {
        assert!(!wide.is_null());
        Self::from_wide(from_raw_parts(wide, len))
    }
    #[inline]
    unsafe fn from_wide_ptr_null(wide: *const u16) -> Self {
        assert!(!wide.is_null());
        for i in 0.. {
            if *wide.offset(i) == 0 {
                return Self::from_wide_ptr(wide, i as usize);
            }
        }
        unreachable!()
    }
}
impl FromWide for OsString {
    #[inline]
    fn from_wide(wide: &[u16]) -> OsString {
        OsStringExt::from_wide(wide)
    }
}
impl FromWide for PathBuf {
    #[inline]
    fn from_wide(wide: &[u16]) -> PathBuf {
        <OsString as OsStringExt>::from_wide(wide).into()
    }
}