Function xmlStringDecodeEntities 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlStringDecodeEntities(
    ctxt: *mut _xmlParserCtxt,
    str: *const xmlChar,
    what: c_int,
    end: xmlChar,
    end2: xmlChar,
    end3: xmlChar,
) -> *mut xmlChar

Expand general entity references in a NUL-terminated string (upstream parser.c xmlStringDecodeEntities, the macro-less variant).

UPSTREAM-PARITY

xmlChar *xmlStringDecodeEntities(xmlParserCtxt *ctxt,
                                 const xmlChar *str, int what,
                                 xmlChar end, xmlChar end2,
                                 xmlChar end3);

Returns NULL when ctxt/str is NULL or any end marker is non-zero (the git-version contract). what is ignored, matching upstream where it is marked ATTRIBUTE_UNUSED.

SAFETY

• ctxt must be a valid xmlParserCtxt* or NULL.
• str must be a valid NUL-terminated string.