WANTED: do while no key pressed (in portable code)

[Chris Torek]

In article <22064 at agate.BERKELEY.EDU> air at anableps.berkeley.edu writes:
>title says it all.

Titles get truncated, so here it is again:

>WANTED: do while no key pressed (in portable code)

Step 1: define, portably, `key pressed'.

I can think of a number of different definitions:

	- there is input available (has nothing to do with `keys' pe se)
	- terminal input is available, character-at-a-time
	- a non-modifier (not SHIFT, etc.) key on a computer keyboard
	  is in the `down' position
	- any key (including SHIFT) is in the down position

The only one that can even make a pretense at portability is the
first, and on a closer look, one discovers that there is no portable
way to do that either.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris at mimsy.umd.edu	Path:	uunet!mimsy!chris