meyer@uw-june (Kurt T. Meyer) (05/04/89)
Hi, I need to figure out how to read a single keystroke in Ada. As far as I can tell, all available I/O routines wait for a carriage return before returning input read from the keyboard. Does anyone out there know of some code that does this? I'm working with Ada on Vax/VMS. Thanks in advance! --Kurt (meyer@june.cs.washington.edu)
ecragg@GMUVAX.GMU.EDU ("EDWARD CRAGG") (05/04/89)
There are no standard procedures in Ada for a live keyboard. Our
solution was to write package IMMEDIATE_IO which is a TEXT_IO clone
(and interchangeable with TEXT_IO) which passes all calls except
actual GETs and PUTs to TEXT_IO, GETs and PUTs are processed by direct
QIOW's. I have beta-test quality versions for both DEC Ada and ALS/N
ADAVAX.
............................................................
Edward E Cragg Bitnet: ECRAGG@GMUVAX
Internet: ECRAGG@GMUVAX.GMU.EDURCONN@WSMR-SIMTEL20.ARMY.MIL (Rick Conn) (05/11/89)
The recently-announced ADA-TUTR in the Ada Software Repository contains routines for single-character I/O using Verdix Ada on a SUN (via a C interface), DEC Ada on a VAX (via the VAX/VMS I/O library), and a second UNIX-C interface (I don't know the origin). These routines are isolated in a system dependency package. See the file in PD1:<MSDOS.ADA> and PD2:<ADA.EDUCATION> (comment file containing Verdix Ada/SUN). Rick -------
jwolf@hpcupt1.HP.COM (John Wolf) (05/13/89)
If REPRESENTATIVE CLAUSES for interrupt vector addresses are supported by your compiler then you could write your own charactor I/O interrupt handler via Ada Tasking. See REPRESENTATIVE CLAUSE in the green book. This would be a way to keep all your code Ada, i.e. not linking to any foreign language objects (this would make the DoD happy). But I have yet to find an Ada compiler where REPRESENTATIVE CLAUSES for interrupt vectors are supported. Think of the Real-Time possibilities with High-Level language programming if it were implemented. jwolf@hpda.HP.COM