Matrix user forums

Hi all,

I think it is a bug in the "COMPARE" string!

If the variable "Test" is rec, with writing below, the answer must be 0. As the third parameter is "1".
Return = Compare$ (Test,"REC",1)

With V5, the response is reversed.

Can you check

thank you
Steve

Good evening. If the variable Test="rec" then this should return '1' - the flag is for 'case insensitive' according to the help file so "REC" and "rec" are seen as the same.

However I have only tested this in simulation but have looked at the C code for the compare and this is as expected. Can you confirm simulation is where the issue is or is it on the chip?

Jonny

Hello Jonny,

In the help file:

Str1 = "ABC"
Str2 = "abc"

RetVal = Compare$(Str1, Str2, 1)

RetVal is now 0 as when case insensitive the two strings are identical.

In my example:

Test = "rec"

Return = Compare$ (Test,"REC",1)

the variable "Return" should contain "0" as in the example above.
but the variable "Return" is "1"

Simulation and real is the same

Steve

Morning. Yes, you are right - I was thinking return '1' for match, '0' for mismatch but the function should return 0 for match.

In simulation this is because the check for the case insensitivity is missing (so checks are always case sensitive) - this will be fixed for v5.2, and apologies for this. If you wish for simulation to be OK, the only real workaround is to use the ToUpper$() and ToLower$() functions to force the case then do a case-sensitive check.

On HW, we created a simple file (attached) and this outputs as expected. It outputs '1' in simulation, but '0' on hardware, so it seems the bug is simulation only. Cheers,

Jonny

Ok
Pending V5.2, I'll change my project accordingly.

thank you for your check.
Steve