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PIC S9(07) COMP-3 1
- Thread starter claudeb
- Start date
Claudeb,
I don't know what ASRA is but looks to me like you will have a problem with signs at the very least. If you only accessed X-2 and X-1 (for instance) it would probably be ok but as soon as you try to access X you will find signs in the middle of a numeric packed field. Initialize X-1 and
X-2 and you will get 00 0C 00 00 in X (where 0C is +).
Hope this helps.
Kfmason
I don't know what ASRA is but looks to me like you will have a problem with signs at the very least. If you only accessed X-2 and X-1 (for instance) it would probably be ok but as soon as you try to access X you will find signs in the middle of a numeric packed field. Initialize X-1 and
X-2 and you will get 00 0C 00 00 in X (where 0C is +).
Hope this helps.
Kfmason
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1
- #4
The problem with the redefines is that the length is not equal but also the redefines does not create two signed fields!
If x contains +1234567 the hexacedimal value will be x'1234567C'. You probably want to get the first two ciphers off from the comp-3 field which is possible, but not with this definition. You can define x-1 as a single byte and put it in front of a valid signed field if that is what you need. So if x-1 has a picture x, you can define something like:
01 TRICK-FIELD.
03 FRONT-OF-COMP-3 PIC X.
03 VALID-SIGN PIC S9 COMP-3 VALUE ZERO.
01 TRICK-NUMBER REDEFINES TRICK-FIELD PIC S9(3) COMP-3.
IF you move x-1 to front-of-comp-3, you can use the numeric field trick-number, but it has a 10 times higher value.
The other and much easier way is of course to move it to a normal numeric field but even then you have some difficulties with the sign. You can define it as a separate sign. The unsigned pic 9(7) field can be redefined for the separate ciphers.
I hope this helps.
If x contains +1234567 the hexacedimal value will be x'1234567C'. You probably want to get the first two ciphers off from the comp-3 field which is possible, but not with this definition. You can define x-1 as a single byte and put it in front of a valid signed field if that is what you need. So if x-1 has a picture x, you can define something like:
01 TRICK-FIELD.
03 FRONT-OF-COMP-3 PIC X.
03 VALID-SIGN PIC S9 COMP-3 VALUE ZERO.
01 TRICK-NUMBER REDEFINES TRICK-FIELD PIC S9(3) COMP-3.
IF you move x-1 to front-of-comp-3, you can use the numeric field trick-number, but it has a 10 times higher value.
The other and much easier way is of course to move it to a normal numeric field but even then you have some difficulties with the sign. You can define it as a separate sign. The unsigned pic 9(7) field can be redefined for the separate ciphers.
I hope this helps.
If you want to manipulate sections of a numeric value using a redefinition, i think you should ditch the comp-3 all together. Also, to evade problems with signs, lose those, too.
A definition like
01 X PIC 9(07).
01 X12 REDEFINES X.
03 X1 PIC 9(02).
03 X2 PIC 9(05).
will provide access to the first two, resp. the last five digits of X seperately.
In spite of it's obvious limitations, you will at least have none of the problems mentioned above.
Good luck !
A definition like
01 X PIC 9(07).
01 X12 REDEFINES X.
03 X1 PIC 9(02).
03 X2 PIC 9(05).
will provide access to the first two, resp. the last five digits of X seperately.
In spite of it's obvious limitations, you will at least have none of the problems mentioned above.
Good luck !
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