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Re: PATCH: termcap special param

X-seq: zsh-workers 13987
From: Clint Adams <schizo@xxxxxxxxxx>
To: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: PATCH: termcap special param
Date: Fri, 13 Apr 2001 23:22:09 -0400
Cc: zsh-workers@xxxxxxxxxx
In-reply-to: <1010414014118.ZM2313@xxxxxxxxxxxxxxxxxxxxxxx>; from schaefer@xxxxxxxxxxxxxxxxxxxxxxx on Sat, Apr 14, 2001 at 01:41:18AM +0000
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References: <20010413194255.A31289@xxxxxxxx> <1010414014118.ZM2313@xxxxxxxxxxxxxxxxxxxxxxx>

> There's no mention of NCURSES_VERSION anywhere in this patch ... what
> check do you mean?

I'm referring to the #if !defined(NCURSES_VERSION) || !defined(COLOR_PAIR)
stuff in bin_echotc, which is theoretically relevant for all calls to
tgetflag().

ncurses 4.2's tgetflag() will return ERR (-1) if called with an argument
not found in boolcodes.  ncurses 5.2's tgetflag() will return 0, a la
Solaris.

We could find out the relevant ncurses versions and qualify the
preprocessor directives, or we could determine what sort of
tgetflag() is present by a configure test, which I guess could
be as simple as testing the return value of tgetflag() when
called with a termcap code guaranteed not to be in boolcodes.
For example, 'co' is quite unlikely to be a boolean flag.

Follow-Ups:
- Re: PATCH: termcap special param
  - From: Andrej Borsenkow

References:
- PATCH: termcap special param
  - From: Clint Adams
- Re: PATCH: termcap special param
  - From: Bart Schaefer

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