Function tidyOptGetEncName 

pub unsafe extern "C" fn tidyOptGetEncName(
    tdoc: TidyDoc,
    optId: TidyOptionId,
) -> ctmbstr

Get character encoding name. Used with @ref TidyCharEncoding, @ref TidyOutCharEncoding, and @ref TidyInCharEncoding. @result The encoding name as a string for the specified option.