Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked
 
PerlMonks  

Re: Re: 2038 bug

by tachyon (Chancellor)
on Apr 11, 2003 at 11:08 UTC ( #249859=note: print w/ replies, xml ) Need Help??


in reply to Re: 2038 bug
in thread 2038 bug

What I don't really understand is why you could not make time_t an unsigned 4 byte int and thus get another 68 odd years out of it. Leaving aside the problems with C code that expects it to be signed. Why was it unsigned in the first place anyway?

As you say there are a lot of issues to be resolved. My main point was to abstract the time handling so at least that can of worms is all in the same place which will make it easier to deal with - all other things being equal.

cheers

tachyon

s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print


Comment on Re: Re: 2038 bug
Re: Re: Re: 2038 bug
by halley (Prior) on Apr 11, 2003 at 14:04 UTC

    tachyon wrote, "What I don't really understand is why you could not make time_t an unsigned 4 byte int and thus get another 68 odd years out of it. Leaving aside the problems with C code that expects it to be signed. Why was it unsigned in the first place anyway?"

    How would you denote my birthdate in 1967, if you use an unsigned forward-pointing integer measured from the epoch of 1970?

    Java standardized on a 64-bit signed time in milliseconds from the same 1970 epoch, which gives them enough range to describe any moment from big bang to big whimper, remain coherent with code that thinks that 1970 was a pretty cool year, and still be a thousand times more precise than the standard unix time. I don't expect time() to follow that standard, but I do think it's safe to say, even considering the usual famous misquote, that 64 bits should be enough for anyone.

    --
    e d @ h a l l e y . c c

      Well, in many areas a millisecond is long. It's a nice ping time to perlmonks.org, but I wouldn't like a millisecond main memory access time. For some physicists, even nanoseconds are not precise enough, they require pico-, femto- or even attoseconds. Unfortunally, with 64 bits and attosecond precision, you only have less than 18.5 seconds as your range.

      Of course, you could always use XS, or Inline::C and use libtai http://cr.yp.to/libtai.html.

      Abigail

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://249859]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others studying the Monastery: (6)
As of 2014-10-31 11:43 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    For retirement, I am banking on:










    Results (216 votes), past polls