CBL_NOT performs a binary, bitwise "not" operation on a series of bytes.
CALL "CBL_NOT"
USING DEST, LENGTH
GIVING STATUS
| DEST PIC X(n) | Data area containing the bytes for the operation. |
| LENGTH Numeric parameter (optional) | Describes the number of bytes to combine. If omitted, then CBL_NOT uses the size of DEST. |
| STATUS Any numeric data item | Contains the return status of the operation. Returns zero if successful, 1 if not. This routine always succeeds, so STATUS always contains a zero. |
For LENGTH bytes, each byte of DEST is negated in a bitwise fashion. For each bit of each byte, the result is the opposite bit value. The "not" operation uses the following table to determine the result:
| Not | |
|---|---|
| 0 | 1 |
| 1 | 0 |