Function glib::filename_to_utf8

pub fn filename_to_utf8(
    opsysstring: impl AsRef<Path>
) -> Result<(GString, usize), CvtError>

Converts a string which is in the encoding used by GLib for filenames into a UTF-8 string. Note that on Windows GLib uses UTF-8 for filenames; on other platforms, this function indirectly depends on the [current locale][setlocale].

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 source encoding is not UTF-8 and the conversion output contains a nul character, the error ConvertError::EmbeddedNul is set and the function returns None. Use g_convert() to produce output that may contain embedded nul characters.

opsysstring

a string in the encoding for filenames

len

the length of the string, or -1 if the string is nul-terminated (Note that some encodings may allow nul bytes to occur inside strings. In that case, using -1 for the @len parameter is unsafe)

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).