question for code pointer | was: Aw: Re: fuzzy rounding, roundoff, roundup(), et cetera.

[newbie nullzwei <newbie-02 gmx de>]

hello @John Denker,

took some time but got it up and running, have to play with it and learn, looks very useful so far ... :-)

a question at you or others ... i'd like to try an attempt to get rid of 'zombie values', can anyone give my a short description which functions handele:
- keyboard input and string to double conversion,
- file read (spreadsheets) and string to double conversion,
- file read (csv, data streams and similar) and string to double conversion,
- when and how long doubles come in use?

would be very nice, thank you,



b.

 

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Gesendet: Samstag, 10. Juli 2021 um 23:52 Uhr
Von: "John Denker via gnumeric-list" <gnumeric-list gnome org>
An: gnumeric-list gnome org
Betreff: Re: fuzzy rounding, roundoff, roundup(), et cetera.

I coded a version of roundup(xx, pp)

It correctly handles all the tricky cases I know of, including:
ru 0.24999999999999997 16
ru 0.1250000001000003 16
ru 0.49999999999999997 16
ru 0.1 -15

It comes with a test harness, and an updated preliminary specification,
in my fpu_exceptions.c program.
See the "ru" and "ruspec" commands in particular.
Interested parties are invited to experiment with it.
If you find a case that doesn't seem to be handled correctly,
please let me know.

https://www.av8n.com/cgit/FPU/tree/fpu_exceptions.c
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