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use std::{
ffi::OsString,
fs, io,
os::windows::ffi::{OsStrExt, OsStringExt},
path::{Path, PathBuf},
};
/// Calculates system path of `file`.
///
/// Note that this function will automatically strip the extended
/// prefix from the resultant path to allow for joining this resultant
/// path with relative components.
pub(crate) fn get_path(file: &fs::File) -> io::Result<PathBuf> {
// get system path to the handle
let path = winx::file::get_file_path(file)?;
// strip extended prefix; otherwise we will error out on any relative
// components with `out_path`
let wide: Vec<_> = path.as_os_str().encode_wide().collect();
let wide_final = if wide.starts_with(&['\\' as u16, '\\' as _, '?' as _, '\\' as _]) {
&wide[4..]
} else {
&wide
};
Ok(PathBuf::from(OsString::from_wide(wide_final)))
}
/// Convenience function for calling `get_path` and concatenating the result
/// with `path`. This function also checks if `path` is absolute in which case,
/// it emulates POSIX and returns the absolute path unmodified instead.
pub(super) fn concatenate_or_return_absolute(file: &fs::File, path: &Path) -> io::Result<PathBuf> {
if path.is_absolute() {
return Ok(path.into());
}
let file_path = get_path(file)?;
Ok(file_path.join(path))
}