Function filename_from_utf8 

pub fn filename_from_utf8(
    utf8string: impl IntoGStr,
) -> Result<(PathBuf, usize), CvtError>

Converts a string from UTF-8 to the encoding GLib uses for filenames. Note that on Windows GLib uses UTF-8 for filenames; on other platforms, this function indirectly depends on the current locale.

The input string shall not contain nul characters even if the @len argument is positive. A nul character found inside the string will result in error ConvertError::IllegalSequence. If the filename encoding is not UTF-8 and the conversion output contains a nul character, the error ConvertError::EmbeddedNul is set and the function returns None.

utf8string

a UTF-8 encoded string.

len

the length of the string, or -1 if the string is nul-terminated.

Returns

          The converted string, or [`None`] on an error.

bytes_read

location to store the number of bytes in the input string that were successfully converted, or None. Even if the conversion was successful, this may be less than @len if there were partial characters at the end of the input. If the error ConvertError::IllegalSequence occurs, the value stored will be the byte offset after the last valid input sequence.

bytes_written

the number of bytes stored in the output buffer (not including the terminating nul).