Xref: utzoo comp.sys.ibm.pc:21065 comp.sources.wanted:5499
Path: utzoo!attcan!uunet!ncrlnk!ncrcae!hubcap!gatech!ukma!mailrus!cornell!uw-beaver!uoregon!stevev
From: stevev@uoregon.uoregon.edu (Steve VanDevender)
Newsgroups: comp.sys.ibm.pc,comp.sources.wanted
Subject: Re: PCcurses charget.c and conio.h
Keywords: PCcurses
Message-ID: <3117@uoregon.uoregon.edu>
Date: 9 Nov 88 19:20:52 GMT
References: <406@dcscg1.UUCP>
Reply-To: stevev@drizzle.UUCP (Steve VanDevender)
Organization: University of Oregon, Computer Science, Eugene OR
Lines: 45

In article <406@dcscg1.UUCP> cpp90221@dcscg1.UUCP (Duane L. Rezac) writes:
>I am working on porting the PCcurses package to the Computer Innovations 
>C86 Optimizing Compiler (No flames please, That's what I'm stuck with :-( )
>
>I have been sucsessful so far with one minor problem. The charget.c function 
>references a file conio.h, which apparently contains a definition of a macro
>kbhit(). Can anyone provide information on what kbhit() is and how I could 
>code a substitute for the C86 compiler? 
>
>Thanks in Advance
>
>-- 
>+-----------------------+---------------------------------------------------+
>| Duane L. Rezac        |These views are my own, and NOT representitive of  |
>| dsacg1!dcscg1!cpp90221|my place of Employment.                            |
>+-----------------------+---------------------------------------------------+


The kbhit() function returns true if input is waiting in the keyboard buffer.

Probably the easiest substitute you can code is to use MS-DOS function call
6 by calling the C86 library function bdos() like this:

	c = bdos(6, 255);

On return c will be 0 if no key was available, or will contain the next 
character from the keyboard.  This has the disadvantage that you will have
to pass the returned character back.

A slightly better, but more difficult, solution is to use MS-DOS call 44h
(I/O control for devices) to check the input status of the keyboard, by
using the sysint21 call.  Check file handle 0 (stdin) using subfunction
6 of the DOS call.

(As you might guess, I use C86 too.  Could you send me the changes you
made to port PC-Curses?  I'll still have to port the screen I/O stuff to
my HP 150 but it would be nice to have the compiler porting out of the
way.)


-- 
Steve VanDevender 	stevev@drizzle.cs.uoregon.edu	stevev@oregon.BITNET
"Bipedalism--an unrecognized disease affecting over 99% of the population.
Symptoms include lack of traffic sense, slow rate of travel, and the
classic, easily recognized behavior known as walking."