CODESYS Forge - CODESYS Forge / Talk / Engineering 🇬🇧: Check for null pointer

Check for null pointer

Forum: Engineering 🇬🇧

Creator: paulpotat

Created: 2021-05-19

Updated: 2021-05-19

paulpotat - 2021-05-19

Hello,
I would like to check for the validity of a pointer in CodeSys but I can't find how to do that anywhere...

How could I do that ? I would like to be able to do something like that :

IF myPointer = NULL THEN ...

I found this (https://help.codesys.com/api-content/2/codesys/3.5.12.0/en/_cds_obj_pou_checkpointer/) in the documentation but I don't understand how I'm supposed to use that.

Hoping somebody can help me, have a good day !
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

hermsen - 2021-05-19

IF pThePointer <> 0 THEN
// Pointer contains an adres
xValid := TRUE;
ELSE
// Pointer does not contain an adres
xValid := FALSE;
END_IF;

👍
2

If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

paulpotat - 2021-05-19

Thank you very much !

If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Log in to post a comment.