Finding MSB in bit string

[Tom Cunningham]

Hopefully this won't get ignored after my last admittedly dumb posting
(re: conversion in printf; thanks for the *civil* replies). I want to
find the MSB in a bit string without having to do a series of shifts.
Only the single bit in place needs to be isolated, to be used for example
in a powers-of-2 switch. Finding the LSB in this way is no problem:

unsigned i, t;

t = -i;
i &= t;
switch (i) {
case 1:
case 2:
case 4:
case 8:
.
.
.
}

Any equivalent way to do this to get the MSB?

Tom Cunningham "Good, fast, cheap -- select two."
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