const PRAddrInfoFB *fb = (const PRAddrInfoFB *) ai; return fb->has_cname ? fb->hostent.h_name : NULL;
h = GETHOSTBYNAME(name);
PR_IMPLEMENT(const char *) PR_GetCanonNameFromAddrInfo(const PRAddrInfo *ai){#if defined(_PR_HAVE_GETADDRINFO)#if defined(_PR_INET6_PROBE)    if (!_pr_ipv6_is_present) {        const PRAddrInfoFB *fb = (const PRAddrInfoFB *) ai;        return fb->has_cname ? fb->hostent.h_name : NULL;    } #endif    return ((const PRADDRINFO *) ai)->ai_canonname;#else    const PRAddrInfoFB *fb = (const PRAddrInfoFB *) ai;    return fb->has_cname ? fb->hostent.h_name : NULL;#endif}