problem with string / function

snipsnip · Joined: 10 Feb 2014 Posts: 74 Location: Melbourne

Hi all,
I've got a problem with a function that returns a string of 21 characters. Works ok with 20 characters.
For some reason when the string is 21 chrs long an extra (null) "thingy" is added to it which prints out as a white square after the actual string.

I thought it was a problem with the GLCD library (ssd1289), but no, it works ok when I give it a 21+ chr variable in the main loop (global)

I've disabled all other functions - in case it was an external problem, but still the same
I've commented out all code in the function below, but still the same - nothing to do with the contained code in the function.
Trimming the string makes no difference either?

Got me stuffed, Any ideas?

cheers

albertsm · Joined: 09 Apr 2004 Posts: 5916 Location: Holland

Best to show a complete sample : include $regfile, $hwstack,$swstack and $framesize. And how it is used.
But my guess :
- check if the string you assign it to is long enough to hold that result.
- check if $framesize is big enough to hold a temp string (depends on how you use the function)
In any case, it works for me.

snipsnip · Joined: 10 Feb 2014 Posts: 74 Location: Melbourne

Thanks,
Yep My bad Had a temp variable too small to accept the return. Embarassed

I seriously spent MANY MANY hours checking the program, I knew to look for this problem as the #1 culprit.
and its not like its a massive / complex beast of a program.

Think I might have lysdexia.

Cheers.

Duval JP · Joined: 22 Jun 2004 Posts: 1161 Location: France

this forum is a friendly corner, and when you spend to much time when you turn crazy it is the place to ask help of the friends

I did it , I do it, and I will do it again !
Wink

jp