diff options
Diffstat (limited to 'vendor/os_str_bytes/src/wasm32/mod.rs')
-rw-r--r-- | vendor/os_str_bytes/src/wasm32/mod.rs | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/vendor/os_str_bytes/src/wasm32/mod.rs b/vendor/os_str_bytes/src/wasm32/mod.rs new file mode 100644 index 000000000..f8ae36861 --- /dev/null +++ b/vendor/os_str_bytes/src/wasm32/mod.rs @@ -0,0 +1,56 @@ +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() +} |