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Re: [bug-gawk] Invalid result when converting to hex literal

From: arnold
Subject: Re: [bug-gawk] Invalid result when converting to hex literal
Date: Thu, 22 Mar 2018 02:15:39 -0600
User-agent: Heirloom mailx 12.4 7/29/08

"Nelson H. F. Beebe" <address@hidden> wrote:

> Should you decide to add support for the %a format in gawk, you are
> correct to be concerned about possible lack of support for accurate
> base conversions in older C libraries.
> A solution for IEEE 754 systems (and thus, not applicable to VAX VMS,
> or IBM S/390 and zSeries mainframes) are the conversion routines
> written by the well-known numerical analyst David M. Gay, available at
>       http://www.netlib.org/fp/
> They have been tested on many different systems and carry license
> statements that I believe should be acceptable for inclusion in GNU
> software.

I reviewed this briefly. There is support for parsing hex floating
point, but I don't see a way to generate such a string from a double,
so that doesn't help on OpenVMS.



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