34         private static extern int strlen (IntPtr ptr);  in strlen()
37         private static extern IntPtr avahi_address_snprint (IntPtr buf, int size, IntPtr address);  in avahi_address_snprint()
40         private static extern IntPtr avahi_address_parse (IntPtr str, Protocol proto, IntPtr ret);  in avahi_address_parse()
42         public static string PtrToString (IntPtr ptr)  in PtrToString()
44             if (ptr == IntPtr.Zero)  in PtrToString()
53         public static string PtrToStringFree (IntPtr ptr)  in PtrToStringFree()
55             if (ptr == IntPtr.Zero)  in PtrToStringFree()
71         private static IntPtr StringToPtr (string str)  in StringToPtr()
74                 return IntPtr.Zero;  in StringToPtr()
77             IntPtr buf = Stdlib.malloc ((uint) bytes.Length + 1);  in StringToPtr()
83         public static void Free (IntPtr ptr)  in Free()
88         public static IntPtr AddressToPtr (IPAddress address)  in AddressToPtr()
90             IntPtr straddr = Utility.StringToPtr (address.ToString ());  in AddressToPtr()
91             IntPtr addrPtr = Stdlib.malloc (32);  in AddressToPtr()
98         public static IPAddress PtrToAddress (IntPtr ptr)  in PtrToAddress()
102             if (ptr != IntPtr.Zero) {  in PtrToAddress()
103                 IntPtr buf = Stdlib.malloc (256);  in PtrToAddress()
104                 IntPtr addrPtr = avahi_address_snprint (buf, 256, ptr);  in PtrToAddress()