Function xmlSwitchInputEncoding 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlSwitchInputEncoding(
    ctxt: *mut _xmlParserCtxt,
    input: *mut _xmlParserInput,
    handler: *mut _xmlCharEncodingHandler,
) -> c_int

Switch the encoding of a specific parser input using an encoding handler.

UPSTREAM-PARITY

int xmlSwitchInputEncoding(xmlParserCtxtPtr ctxt, xmlParserInputPtr input,
                           xmlCharEncodingHandlerPtr handler);