[Toybox] [PATCH] date: add --iso and the %:z output format.

[enh]

On Sun, Nov 15, 2020, 00:53 Rob Landley <rob at landley.net> wrote:

> On 11/14/20 5:06 PM, enh via Toybox wrote:
> > I didn't know until implementing this that --iso is actually called
> > --iso-8601 and that GNU date will actually accept any prefix. --iso-8
> > works fine too. I've assumed that --iso (that I always used) and
> > --iso-8601 (as given in the documentation) are the only two that matter.
> > ---
>
> Please explain this line:
>
>       strcpy(out+4, out+3);
>

strftime only supports the -0800 style of time zone, so that moves the 00
up so we can insert the : and get -08:00.

Rob
>
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