Function xmlMemGet 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlMemGet(
    freeFunc: *mut Option<xmlFreeFunc>,
    mallocFunc: *mut Option<xmlMallocFunc>,
    reallocFunc: *mut Option<xmlReallocFunc>,
    strdupFunc: *mut Option<xmlStrdupFunc>,
)

Get the current memory allocator functions.

UPSTREAM-PARITY

void xmlMemGet(xmlFreeFunc *freeFunc,
               xmlMallocFunc *mallocFunc,
               xmlReallocFunc *reallocFunc,
               xmlStrdupFunc *strdupFunc);

SAFETY

• All output pointers must be valid (non-null) and writable