Bitwise AND isn't working for me...

Question

Hi,
I'm trying to do something that would be extremely easy for me in a language like C or C++, but since I know nothing about SAP or ABAP except what I've read in the past few days, this problem is a little harder than I had hoped.
I have some ABAP code written by someone else long ago, which I need to fix.  Here is the part of the code that I'm trying to modify:
IF usr02-uflag = 0.
      zreturn-number = '245'.
      zreturn-message = 'USER IS IN ENABLE STATE'.
      APPEND zreturn TO return.
      CLEAR zreturn.
* value '64' is stored, if input user is in lock state done by
* adminstrator
    ELSEIF <b>usr02-uflag = '64'.</b>
      zreturn-number = '777'.
      zreturn-message = 'USER IS LOCKED BY ADMINISTRATOR'.
      APPEND zreturn TO return.
      CLEAR zreturn.
I want to change the comparison <b>usr02-uflag = '64'.</b> so that it AND's the value with 64 so I can see if that particular bit flag is turned on.
I haven't been able to find any type declaration for usr02 yet, but I'm assuming usr02-uflag is some kind of string or xstring...?
I tried converting the string to a hex number and using the BIT-AND operator, but I didn't get the correct value when I did that.
Can someone please show me the quickest/easiest way to do the following (pseudo-code of course):
ELSEIF ( usr02-uflag BIT-AND 64 ) = 64.

Answer 1

Well as I said, I don't know what the data type of usr02-uflag is, but since it is compared with a number in quotes, I'm assuming that means it's a string?
usr02-uflag holds a SAP user's Locked status.  64 means they were locked by the administrator and 128 means they were locked by themselves when entering the wrong password a few times.  I've noticed that it is possible for a user to be in both states at the same time.  Since that would produce a value of '192' neither of the ELSEIF conditions would catch it and it would fall through to the default.
I could explicitely test for a value of '192', but since I don't know what other bits might be turned on for other user status's, I'd rather AND the value with '64' or '128' to determine if the user is Admin or User Locked...
Here is some more code at the top of the ABAP.  I'm not sure if it helps much?
* tables used for fetching the status of an user
  TABLES: usr02.
  DATA : BEGIN OF zreturn .
          INCLUDE STRUCTURE bapiret2.
  DATA : END OF zreturn.
* Fetch record from system table USR02. This table is used to store User
* data
  TRANSLATE username TO UPPER CASE.
  SELECT SINGLE * FROM usr02 WHERE bname = username.