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use std::borrow::Cow;
use std::error::Error;
use std::ffi::OsStr;
use std::ffi::OsString;
use std::fmt;
use std::fmt::Display;
use std::fmt::Formatter;
use std::result;
use std::str;
use std::str::Utf8Error;
if_raw_str! {
pub(super) mod raw;
}
#[derive(Debug, Eq, PartialEq)]
pub(super) struct EncodingError(Utf8Error);
impl Display for EncodingError {
fn fmt(&self, formatter: &mut Formatter<'_>) -> fmt::Result {
write!(formatter, "os_str_bytes: {}", self.0)
}
}
impl Error for EncodingError {}
type Result<T> = result::Result<T, EncodingError>;
macro_rules! expect_utf8 {
( $result:expr ) => {
$result.expect(
"platform string contains invalid UTF-8, which should not be \
possible",
)
};
}
pub(super) fn os_str_from_bytes(string: &[u8]) -> Result<Cow<'_, OsStr>> {
str::from_utf8(string)
.map(|x| Cow::Borrowed(OsStr::new(x)))
.map_err(EncodingError)
}
pub(super) fn os_str_to_bytes(os_string: &OsStr) -> Cow<'_, [u8]> {
Cow::Borrowed(expect_utf8!(os_string.to_str()).as_bytes())
}
pub(super) fn os_string_from_vec(string: Vec<u8>) -> Result<OsString> {
String::from_utf8(string)
.map(Into::into)
.map_err(|x| EncodingError(x.utf8_error()))
}
pub(super) fn os_string_into_vec(os_string: OsString) -> Vec<u8> {
expect_utf8!(os_string.into_string()).into_bytes()
}
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