Building upon Cliff's formulas, here's another idea for doing faster conversions of the current apr_time_t format to seconds:
What we want is t/1000000
What we can do easily is t/1048576
But what can we add to t/1048576 to approximate t/1000000?
If I solve for 'C' in t/1000000 = t/1048576 + t/C I get C= ~21,586,297 That's not a power of 2, but what if use 2^24 (~16M) as an approximation:
seconds = (t >> 20) + (t >> 24)
That probably isn't accurate enough, but you get the basic idea: sum a couple of t/(2^n) terms to approximate t/1000000.
What do you think?
--Brian
