Function xmlCreateCharEncodingHandler 

#[unsafe(no_mangle)]
pub extern "C" fn xmlCreateCharEncodingHandler(
    name: *const c_char,
    flags: c_int,
    impl_: Option<xmlCharEncConvImpl>,
    implCtxt: *mut c_void,
    out: *mut *mut c_void,
) -> c_int

Find or create an encoding handler by name with flags and an optional custom conversion implementation.

UPSTREAM-PARITY

xmlParserErrors xmlCreateCharEncodingHandler(
    const char *name, xmlCharEncFlags flags, xmlCharEncConvImpl impl,
    void *implCtxt, xmlCharEncodingHandler **out);