Control Data Corporation 3300 Reference Manual page 251

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ENTER COMPASS. ALLOCATE, P-S-LIST. U-BLK,
N-FILE, ALK.
OPEN 1-0 P-S-LIST.
CP~N
OUTPUT N-FILE.
COLL-P~IMARY.
MOVE PLH-SAK TO pqIM-KEY.
PERFORM P-KEY-UPOATE.
MOVE UP-KEY TO PLH-SAK.
WRITE T-RtC-2 FROM HEADER.RECORD-STORAGE
INVAL1U KEY PERFORM PROGRAM-BUG.
R~AD PHIM-SEC-LIST INVALYO KEY PERFORM PROGRAM-BUG,
IF FORWARU-LINK
=
AACK~ARO-LINK AND HEADER-SAK
GO
TO COLl,-I\JUivl-EN().
MOVE FORWARD-LINK TO ~RIM-KEY.
MOVE BACKWARD-LINK TO TEM-KEY-l.
MOVE UP-KEY TO P-KEV. HEADER-SAK. rEM.KEY-2
~ERFORM P-KEY-UPOATE.
MOVE UP-KEY TO FORWARU-LINK.
tAJRt TE T-REC-2 FROM P;HMAKY ..
Rr·CORD
INVALIO KEY PEPFCR~ PROGRA~-HUG.
COLl.PRIM-l.
IF PRIM-KEY
=
TEM-KFY-1 ~O TO CCLl-PRI~-2.
pEAO PRIM-SEC-LIST INVQLIO KEY PERFORM
PROGRAM-BUG,
MOVE FOHWARO-LINKTO PP.II'v1-KEY.
MOVE P-KEY TO BACKWARD-LINK.
MOVE TEM-KEY-~ TO HEAUEH-5AK.
MOvE UP-KEY TO P-KEV.
PERFORM P-KEY-UPOATE.
MOVE UP-KEY TO FORWAPD-LTNK.
WRITE T-REC-2 FqOM PRIMARY-RECORD
INVALID KEY PERFORM PROGRAM-8UG.
GO TO cell-PRIM-l.
CCLL.PRIM-2.
READ PRIM-SEC-LIST INVALID KEY PERFORM
PRCGRAM.aUG.
MOVE P-KEY TO HACKWARO-LINK.
MOVE
TEM-KEY-~
TO FORWARn-LINK, HEADER-SAK.
MOVE UP-KEY TO p-KEY.rEM-KEY~7.
WRITE T-REC-2 FROM
P~IMARY-RECORD
INVALID
K~Y PERFO~M
PROGRAM-BUG.
MOVE TEM-KEY-2 TO P-KEv.
READ P-S-LtST I~To pRIMARY-RECORD
INVALID
~€Y
PERFORM
PRCGRA~-BUG.
MOVE TEM-KEY·' TO 8ACKwAPO-LyNK.
WRITE T-REC-2 FROM
P~IMARY-RECCRD
INVALID KEY
g~RFC~M
PROGRAM-BUG.