Function xmlMemoryStrdup 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlMemoryStrdup(
    str: *const c_char,
) -> *mut c_void

Duplicate a string through the debug allocator (upstream xmlmemory.h).

void *xmlMemoryStrdup(const char *str);

NULL returns NULL (upstream xmlPosixStrdup/xmlCharStrdup contract).

SAFETY

• str must point to a valid NUL-terminated string, or NULL
• The returned pointer must be freed with xmlMemFree (or xmlFree)