instance Show SockAddr
t.zielonka at students.mimuw.edu.pl
Sun Oct 17 18:03:27 EDT 2004
On Sun, Oct 17, 2004 at 11:57:49PM +0200, Peter Simons wrote:
> Tomasz Zielonka writes:
> >> ha2tpl :: HostAddress -> (Int, Int, Int, Int)
> >> ha2tpl n =
> >> let (b1,n1) = (n .&. 255, n `shiftR` 8)
> >> (b2,n2) = (n1 .&. 255, n1 `shiftR` 8)
> >> (b3,n3) = (n2 .&. 255, n2 `shiftR` 8)
> >> b4 = n3 .&. 255
> >> in
> >> (fromEnum b1, fromEnum b2, fromEnum b3, fromEnum b4)
> > This won't work on big-endian architectures.
> Why not?
Because GHC keeps HostAddress in network-order (aka big-endian) but
Data.Bits works in host order. First octet of IP4 address is the most
significant byte in network-order word, but here you take it from
the least significant byte.
I assume that HostAddress on big-endian machines is also kept in
network-order - but there this is the same as the host-order, so if you
take the least significant byte you will get the last IP4 octet.
.signature: Too many levels of symbolic links
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