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From: Kevin Ryde <user42@zip.com.au>
Cc: guile-devel@gnu.org
Subject: Re: ratio implementation
Date: Tue, 29 Jul 2003 10:41:20 +1000	[thread overview]
Message-ID: <871xwakvv3.fsf@zip.com.au> (raw)
In-Reply-To: <3F250809.9030108@ccrma.stanford.edu> (Bill Schottstaedt's message of "Mon, 28 Jul 2003 04:24:57 -0700")

Bill Schottstaedt <bil@ccrma.Stanford.EDU> writes:
>
> I use longs for the numerator and denominator, so if bignums are
> encountered, I fallback on the old method using scm_divide.

It'd be nice to allow bignum numerators and denominators.  It's rather
easy to make a calculation where the denominator starts to blow up.

The gmp mpq functions might help, but there's no particular need to
use them, most of the same things could be done directly just with a
pair of scheme integers.

> I notice that r5rs seems to
> imply that (inexact->exact .3) should return 3/10 (see the rationalize
> example which is assuming this)

Isn't that the effect of the rationalize function, rather than
inexact->exact?


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  parent reply	other threads:[~2003-07-29  0:41 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-28 11:24 ratio implementation Bill Schottstaedt
2003-07-28 12:08 ` Han-Wen Nienhuys
2003-07-29  0:41 ` Kevin Ryde [this message]
2003-07-29 11:57   ` Bill Schottstaedt
2003-07-30 22:42     ` Kevin Ryde
2003-09-15 10:35 ` Marius Vollmer
2003-09-15 16:19   ` Rob Browning
2003-09-15 22:06   ` Dirk Herrmann
2003-09-15 22:59     ` Kevin Ryde
2003-09-16 11:39     ` Bill Schottstaedt
2003-09-16 21:36       ` Rob Browning
2003-09-18 21:09       ` Dirk Herrmann
2003-10-07 15:26         ` Marius Vollmer
2003-10-13 10:58           ` Bill Schottstaedt
2003-10-14  8:57             ` Marius Vollmer
2004-02-18 14:25               ` fractions.test Bill Schottstaedt
2003-10-14 12:39             ` ratio implementation Marius Vollmer
2003-10-14 22:56               ` Kevin Ryde
2003-10-14 13:03             ` Marius Vollmer
2003-10-14 23:37               ` Kevin Ryde
2003-10-16 11:49                 ` Bill Schottstaedt
2003-10-17 10:09                 ` Marius Vollmer
2003-10-17 11:47                   ` Bill Schottstaedt
2003-10-17 15:04                   ` Rob Browning
2003-10-18  0:45                   ` Kevin Ryde
2003-10-15 12:57               ` Bill Schottstaedt
2003-10-17 10:20                 ` Marius Vollmer
2003-10-17 15:14                   ` Rob Browning
2003-10-17 15:42                     ` Marius Vollmer
2003-10-14 23:01             ` Kevin Ryde
2003-10-18  0:55               ` ash using shifts (was: ratio implementation) Kevin Ryde
2003-10-07 15:24       ` ratio implementation Marius Vollmer

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