Function __xmlParserInputBufferCreateFilename 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn __xmlParserInputBufferCreateFilename(
    URI: *const c_char,
    enc: c_int,
) -> *mut _xmlParserInputBuffer

Upstream __xmlParserInputBufferCreateFilename(const char *URI, xmlCharEncoding enc) — the non-reentrant internal variant; forwards to the regular xmlParserInputBufferCreateFilename.