kbhit and chhit return

[carlos-montiers]

Hello. I'm thinking that KBHIT in the getter and caller form should return code 0 if no key was present, and CHHIT should return empty string if no key was present.

Because we can have negatives code when extended keys are used, 0 for code and empty string for character are more significant to represent "none".

I understand CHHIT return -1 for allow get the code of the NULL character, but I think that is not a common key for press, even CTRL+A produces 1, thus how someone can press the NULL character?. Thus I think is better replace the use of -1

[adoxa]

You wanted to replace KBHIT/GETKB with virtual key names, so no key would become VK_NONE. Do you no longer want to do that?

^@ (aka Ctrl+2) is the null character, but we currently assume it to be an extended key, so it just waits for another character, anyway. Besides which, it generates an empty string, so won't work, anyway. An empty string is a little harder to test, since it undefines a variable or needs quoting in an IF.

[carlos-montiers]

You wanted to replace KBHIT/GETKB with virtual key names, so no key would become VK_NONE. Do you no longer want to do that?

I already want that.

^@ (aka Ctrl+2) is the null character

Oh, I not know that.

An empty string is a little harder to test, since it undefines a variable or needs quoting in an IF.

Thus I prefer keep using the -1 for CHHIT and KBHIT