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Re: [Chicken-users] long pointer equivalent
From: |
Perry E. Metzger |
Subject: |
Re: [Chicken-users] long pointer equivalent |
Date: |
26 Aug 2002 12:36:57 -0400 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 |
"felix" <address@hidden> writes:
> > Well, it can't be a float in that if you're doing lseeks you really
> > want to specify which block in the disk it is you're looking for, not
> > which general section. :)
>
> I don't understand. As long as you return/pass a float with
> a zero fraction, everything should be ok:
>
> (lseek 545485845.0 seek_cur)
>
> It only has to be *representable* as a 64-bit number. And that
> can be checked in the call.
All fractionless zero-exponent 64 bit floats can be represented as 64
bit integers. The problem is that the reverse is not true -- all 64
bit integers cannot be represented exactly as the the mantissa of some
double precision float.
--
Perry E. Metzger address@hidden
--
"Ask not what your country can force other people to do for you..."
- Re: [Chicken-users] long pointer equivalent, (continued)
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/22
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/23
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/23
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/24
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/25
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/25
- Re: [Chicken-users] long pointer equivalent, Perry E. Metzger, 2002/08/25
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, Perry E. Metzger, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/26
- Re: [Chicken-users] long pointer equivalent,
Perry E. Metzger <=
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/27
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, Perry E. Metzger, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, Perry E. Metzger, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, Benedikt Rosenau, 2002/08/26
- Re: [Chicken-users] long pointer equivalent, tonyg, 2002/08/27
- Re: [Chicken-users] long pointer equivalent, felix, 2002/08/27
- Re: [Chicken-users] long pointer equivalent, Perry E. Metzger, 2002/08/27
- Re: [Chicken-users] long pointer equivalent, Peter Keller, 2002/08/27