Chet Ramey wrote: > Pádraig Brady wrote: >> -------- Original Message -------- >> Date: Tue, 07 Oct 2008 11:55:51 +0100 >> From: Pádraig Brady <[EMAIL PROTECTED]> >> To: Chet Ramey <[EMAIL PROTECTED]> >> CC: [EMAIL PROTECTED] >> >> I was just discussing bit shifting with Tim Hockin using shell >> arithmetic expansion, and he pointed out that bash and ksh >> use arithmetic rather than logical shift for the >> operator. > > Actually, bash and ksh use whatever the native C compiler implements, > since both just translate the >> and << into the same operators > internally. > > I don't see a really compelling reason to change, since, as you say, > the standard requires signed long ints.
Well that means the result is compiler dependent. So scripts could give different results on another platform, or less often within a platform. Also arithmetic right shift is not useful. Pádraig.
