[9fans] plan9 ms .if h test

[pmarin.mail@gmail.com (pmarin)]

I searched where the register h is defined:

% 9 grep -n '.nr h ' tmac.*

tmac.cs:103: .nr h 6
tmac.cs:477: .  nr h \\ne \}
tmac.mcs:208: .nr h 6
tmac.mcs:840: .nr h \\ne

where h has the same meaning:
'''\"	h - cover sheet basic distribution length

Both tmac.cs and tmac.mcs load tmac.s in their inicialization so
probably h  only have sense when tmac.cs or tmac.mcs are used.

I think that if you are only using the ms macros then h is not
important because is not defined.

Cheers.
pmarin.




On Wed, Mar 30, 2011 at 4:21 PM, Rudolf Sykora <rudolf.sykora at gmail.com> wrote:
> Hello 9fans,
>
> in the troff ms-definition file (in plan 9, p9p)
> /sys/lib/tmac/tmac.s
> I can find this structures
> .if h ...
> or
> .ie h ...
>
> I really can't find what this test means (the 'h'), I only know the
> o,e,t,n built-ins.
> Please, can anybody tell?
>
> [
> In p9p, it's e.g. on
> /opt/plan9/tmac/tmac.s:329 you have
> .ie h .ll \\n(LLu
> .el \{\
> ...
> ]
>
> Thank you very much!
> Ruda
>
>