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Question
Evaluating keyboard entries
I managed to turn off the input buffer on the terminal so i can process one key character at a time. My question is how can i evaluate the keys (especially the arrow and function) when the user presses them and do a certain action on whatever key is pressed.
We have an AIX Unix.
Thanks
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Answers
alvinrc,
Sorry I am not very conversent with unix but I think if i give u an assembly language code containing bios interrupts it should work. 'cause Whatever u're os is whatever language u use it can understand assembly bios interrupts. Paste this code in any of u're functions like this:-
_asm
{
mov ah,00h;
int 16h;
/*what these two lines will do is that they will invoke bios-interrupt 16h with function 00h which is `get a character from keyboard'
after executing these two lines u will have `ah' containing the scan code (0 or 1) depending on whether spacial character has been pressed or not and `al' will contain the ascii of your interest. You can write following instruction to validate the same
/*
mov boolean,ah;
mov character,al;
do_validation;
}
This will surely help.
regards
nadt
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by: nadtPosted on 2000-03-11 at 22:50:28ID: 2609009
I think this should work
int readkey(int *function_key)
{
char tempkey;
*function_key=0;
tempkey=getch();
if (tempkey==0)
{
function_key=1;
tempkey=getch();
}
return(tempkey);
}
you can cut paste this procedure in your program as-is. What this procedure essentially does is:-
1) if special key is pressed it returns its ascii number and sets *function_key=1; prompting you that a special key like arrow or esc has been pressed.
2) if normal key is pressed it returns its ascii number and sets *function_key=0; prompting you that is a normal key has been pressed.
call this function in your program as:-
int isfunct;
int xyz;
xyz=readkey(&isfunc);
hope this helps,
nadt