WANTED: The able to test for a key-pressed or be able to time out from a (read- like function.
The object is to be able to interrupt a loop with a key stroke. currently all input functions are blocking and wait forever for input. Sometimes when no input is forth coming we need to be able to move on.
(net-peek and (net-connect with it's timeout are good examples of non-blocking input.
In windows we have the following workaround but nothing I can figure out for the other os's
(if (not _kbhit) (import "msvcrt.DLL" "_kbhit" ))
(if (not _getch) (import "msvcrt.DLL" "_getch" ))
(define (key-pressed)
(if (= 0 (_kbhit)) nil
(begin
(setq keyval (_getch))
(if (or (= keyval 0)(= keyval 224)) (CONSOLE:_getch))
(setq keypress (char keyval)))))
In version 10.7.3 a 'true' flag parameter in 'read-key' enables non-blocking behavior.
When using '(read-key true)' a 0 (zero) is returned when no key was pressed or the key code is returned when a key was pressed.
http://newlisp.nfshost.com/downloads/development/inprogress/
Tested on macOS, Ubuntu Linux, FreeBSD, OpenBSD and MS Windows.
Thank you! my only question is if 10.7.3 will be released as binaries for windows in the near future ?
Now I am retired the cost of maintaining the mickeysoft development tools has become prohibitive.
Bottom line is I no longer have a windows build environment on my current system and plan on using newlisp exclusively going forward.
You can find an executable Windows version here:
http://newlisp.nfshost.com/downloads/development/inprogress/
thanks, but I need a 32bit one. I will go into more detail why in a different thread.
Both, 32-bit and 64-bit now here: http://www.newlisp.org/downloads/development/inprogress/