Function xmlCheckHTTPInput 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlCheckHTTPInput(
    ctxt: *mut _xmlParserCtxt,
    ret: *mut _xmlParserInput,
) -> *mut _xmlParserInput

Check an input for HTTP access; with XML_PARSE_NONET set, HTTP inputs are refused and freed.

UPSTREAM-PARITY

xmlParserInputPtr xmlCheckHTTPInput(xmlParserCtxtPtr ctxt,
                                    xmlParserInputPtr ret);

SAFETY

• ctxt, ret must be valid pointers (or NULL where the upstream C contract allows), obtained from the matching constructor/owner and not yet freed; the callee may take or keep ownership exactly as the C API specifies.

The caller must not race this call with concurrent mutation of the same objects from other threads (per-object state is not internally synchronized). Violating any of the above is undefined behavior.

Exercised by the C-API differential courts (courts/suites/data-abi/*-family-probe.c) and the CLI differential courts; those pass byte-for-byte against the upstream oracle.