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Groups > comp.sys.acorn.programmer > #5933
| From | Jean-Michel <jmc.bruck@orange.fr> |
|---|---|
| Newsgroups | comp.sys.acorn.programmer |
| Subject | Re: BASIC oddity? |
| Date | 2020-01-06 20:39 +0100 |
| Organization | Jean-Michel |
| Message-ID | <8c773c2e58.jmb@jmc.bruck.orange.fr> (permalink) |
| References | <4adaa32c58.Alan.Adams@ArmX6.adamshome.org.uk> <582cb030b8News03@avisoft.f9.co.uk> <quoa19$o6o$1@dont-email.me> |
In message <quoa19$o6o$1@dont-email.me>
druck <news@druck.org.uk> wrote:
> On 03/01/2020 19:31, Martin wrote:
>> There is no way for BASIC to subtract two 5-byte integers, apart from
>> spliiting each to one 5-byte integer and one 1-bute - and handling
>> the case where the result is negative.
> I'd always opt for a bit of assembler to do that, as its every easy to
> do arbitrary sized arithmetic when you've got access to the CPU flags.
>> However, if the difference is small, or you can ignore the lest
>> significant byte, you may be able to chose a single 4-bytes that will
>> provide the difference.
> I'd never recommend that, no matter how sort the interval, an over flow
> will occur at some point (the next in about 10 years from now).
> But anyway this highlights the lack of date and time manipulation SWIs
> in RISC OS. The only things you can do with a 5 byte time is convert it
> to or from a string.
SWI Territory_ConvertTimeToOrdinals
return an integers block with centisecond, second, minute, hour, etc
PRM3 page 815
--
Jean-Michel BRÜCK (France)
Mél :jmc.bruck@orange.fr
Site : https://jeanmichelb.riscos.fr/
RiscOS 5.23 : RiscPc/IyonixPC/Raspberry/ARMX6.
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BASIC oddity? Alan Adams <alan@adamshome.org.uk> - 2020-01-03 17:16 +0000
Re: BASIC oddity? Martin <News03@avisoft.f9.co.uk> - 2020-01-03 19:31 +0000
Re: BASIC oddity? druck <news@druck.org.uk> - 2020-01-03 21:00 +0000
Re: BASIC oddity? Alan Adams <alan@adamshome.org.uk> - 2020-01-03 22:26 +0000
Re: BASIC oddity? Steve Drain <steve@kappa.me.uk> - 2020-01-04 10:40 +0000
Re: BASIC oddity? Martin <News03@avisoft.f9.co.uk> - 2020-01-04 16:08 +0000
Re: BASIC oddity? Alan Adams <alan@adamshome.org.uk> - 2020-01-04 16:22 +0000
Re: BASIC oddity? David Higton <dave@davehigton.me.uk> - 2020-01-04 17:24 +0000
Re: BASIC oddity? Alan Adams <alan@adamshome.org.uk> - 2020-01-04 18:47 +0000
Re: BASIC oddity? Matthew Phillips <spam2011m@yahoo.co.uk> - 2020-01-06 08:58 +0000
Re: BASIC oddity? David Higton <dave@davehigton.me.uk> - 2020-01-06 16:20 +0000
Re: BASIC oddity? Matthew Phillips <spam2011m@yahoo.co.uk> - 2020-01-07 08:49 +0000
Re: BASIC oddity? Martin <News03@avisoft.f9.co.uk> - 2020-01-07 11:20 +0000
Re: BASIC oddity? David Higton <dave@davehigton.me.uk> - 2020-01-07 15:05 +0000
Re: BASIC oddity? Matthew Phillips <spam2011m@yahoo.co.uk> - 2020-01-08 08:23 +0000
Re: BASIC oddity? Alan Adams <alan@adamshome.org.uk> - 2020-01-08 10:26 +0000
Re: BASIC oddity? druck <news@druck.org.uk> - 2020-01-08 21:02 +0000
Re: BASIC oddity? Richard Ashbery <basura@invalid.addr.uk> - 2020-01-09 12:53 +0000
Re: BASIC oddity? Steve Fryatt <news@stevefryatt.org.uk> - 2020-01-09 23:16 +0000
Re: BASIC oddity? Steve Fryatt <news@stevefryatt.org.uk> - 2020-01-08 22:35 +0000
Re: BASIC oddity? Martin <News03@avisoft.f9.co.uk> - 2020-01-08 23:51 +0000
Re: BASIC oddity? Steve Drain <steve@kappa.me.uk> - 2020-01-10 11:30 +0000
Re: BASIC oddity? Alan Adams <alan@adamshome.org.uk> - 2020-01-10 12:38 +0000
Re: BASIC oddity? Jean-Michel <jmc.bruck@orange.fr> - 2020-01-06 20:39 +0100
Re: BASIC oddity? Alan Adams <alan@adamshome.org.uk> - 2020-01-06 21:13 +0000
Re: BASIC oddity? Steve Drain <steve@kappa.me.uk> - 2020-01-08 12:46 +0000
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