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%TITLE 'S D R   -- Secondary Data Record routines'
!<BLF/REQUIRE 'RMSBLF.REQ'>
MODULE sdr (IDENT = '2.0'
		) =
BEGIN

GLOBAL BIND
    sdrv = 2^24 + 0^18 + 415;			! Edit date: 7-Jul-83

!+
!
!
!
!	COPYRIGHT (C) DIGITAL EQUIPMENT CORPORATION 1977, 1986.
!	ALL RIGHTS RESERVED.
!
!	THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY  BE  USED  AND
!	COPIED ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH
!	THE INCLUSION OF THE ABOVE COPYRIGHT NOTICE.   THIS  SOFTWARE  OR
!	ANY  OTHER  COPIES  THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE
!	AVAILABLE TO ANY OTHER PERSON.  NO TITLE TO AND OWNERSHIP OF  THE
!	SOFTWARE IS HEREBY TRANSFERRED.
!
!	THE INFORMATION IN THIS SOFTWARE IS  SUBJECT  TO  CHANGE  WITHOUT
!	NOTICE  AND  SHOULD  NOT  BE CONSTRUED AS A COMMITMENT BY DIGITAL
!	EQUIPMENT CORPORATION.
!
!	DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR  RELIABILITY  OF
!	ITS SOFTWARE ON EQUIPMENT THAT IS NOT SUPPLIED BY DIGITAL.
!
!
!
!    AUTHOR:	S. BLOUNT /EGM
!
!
!
!    THIS MODULE CONTAINS ALL ROUTINES WHICH DEAL PRIMARILY
!    WITH SECONDARY DATA RECORDS. SEVERAL OTHER ROUTINES
!    THROUGHOUT RMS-20 ALSO PROCESS SECONDARY RECORDS (CALLED
!    "SIDR" RECORDS ) BUT THESE ROUTINES PROCESS ONLY THESE
!    DATA RECORDS.
!
!    **********	TABLE OF CONTENTS	**************
!
!
!
!    ROUTINE			FUNCTION
!    =======			========
!
!    MAKESIDR		CREATE A SECONDARY DATA RECORD
!
!    BLDCSIDR		BUILD A CONTINUATION SIDR
!
!    DOSIDR			PROCESS THE SIDR INSERTION
!
!    INSRTSIDR		OUTER-LEVEL SIDR INSERTION ROUTINE
!
!    BLDISIDR		BUILD AN INITIAL SIDR
!
!    DELSIDR			DELETE A SIDR RECORD
!
!    SQUEEZESIDR		SQUEEZE ONE SIDR RECORD FROM BUCKET
!
!    PUTSIDR			INSERT CURRENT RECORD INTO SECONDARY INDEX
!
!
!
!
!    REVISION HISTORY:
!
!    PRODUCT	LOCAL
!    EDIT	EDIT	DATE		WHO		PURPOSE
!    ====	====	====		===		=======
!
!    -	1	11-OCT-76	SB	ADD DELSIDR
!    -	2	28-OCT-76	SB	FIX BUG IN MOVEDOWN ARG IN DOSIDR
!    -	3	7-NOV-76	SB	ADD DELETED RFA BIT
!    -	4	9-DEC-76	SB	FIX BUG SO THAT IF ALL
!    SIDR RECORDS ARE MOVED OUT
!    OF THE BUCKET ON A SPLIT, THE
!    NEW HIGH-KE IS OF R-NEW
!    -	5	8-MAR-77	SB	TAKE OUR CHECK FOR SIDR ALREADY DELETED
!    -	6	3-MAY-77	SB	ADD FIX FOR SIDRELEMENT FIELD
!    6	7	26-JAN-78	SB	IF SIDR BKT IS FULL, FREESPACE
!    WAS NEGATIVE, CHECK WAS BAD
!
!    *************************************************
!    *						*
!    *		NEW REVISION HISTORY		*
!    *						*
!    *************************************************
!
!    PRODUCT	MODULE	 SPR
!    EDIT	 EDIT	 QAR		DESCRIPTION
!    ======	======	=====		===========
!
!    12		    8	11439
!
!				    RST KEY BUFFER IS NOT BEING
!				    UPDATED WHEN A SIDR BUCKET SPLITS.
!				    THIS CAUSES THE ALTERNATE KEY ROOT
!				    BUCKET TO BE UPDATED INCORRECTLY,
!				    SOMETIMES WITH KEY VALUES FROM
!				    OTHER INDEX LEVELS (SUCH AS
!				    PRIMARY).  THE END RESULT IS THAT
!				    A VALID GET/FIND LOSES.  MAKE SURE
!				    THE LAST KEY FROM THE ORIGINAL
!				    BUCKET IS COPIED TO THE RST KEY
!				    BUFFER AFTER A SPLIT OCCURS.  ALSO
!				    - FIX AN OFF BY 1 BUG (END
!				    POINTER) WHICH GARBAGES THE
!				    CURRENT AND FOLLOWING SIDR AFTER
!				    SPLIT MOVES THE CURRENT SIDR TO A
!				    NEW BUCKET.
!
!   **** Begin RMS V2 Development
!
!	400	400	xxxxx	    Clean up BLISS code (RL,22-Apr-83)
!
!	415		xxxxx	    Use 30-bit address when needed in
!				    PUTSIDR's call to MOVEKEY.
!				    (RL, 7-Jul-83)
!
!    ***** END OF REVISION HISTORY *****
!
!
!
!
!
!-

REQUIRE 'rmsreq';
%SBTTL 'MAKESIDR - create SIDR'

GLOBAL ROUTINE makesidr (recdesc, sidrptr) : NOVALUE =
! MAKESIDR
! ========
! ROUTINE TO CREATE A SECONDARY INDEX DATA RECORD (SIDR).
!	THIS ROUTINE ASSUME THAT THE CORRECT POSITION TO
!	CREATE THE RECORD HAS BEEN FOUND. NO ADJUSTMENT
!	OF THE BUCKET HEADER INFO, NOR ANY INDEX UPDATES
!	ARE DONE WITHIN THIS ROUTINE.
!	THE RFA FOR THE SIDR MUST BE ALLOCATED BEFORE THIS
!	ROUTNE IS CALLED
! INPUT:
!	RECDESC		RECORD DESCRIPTOR PACKET
!		RFA		RFA OF SIDR RECORD
!		RRV		RECORD POINTER TO INSERT INTO SIDR
!		USERPTR		ADDRESS OF SEARCH KEY STRING
!
!	SIDRPTR		ADDRESS TO WRITE RECORD
! OUTPUT:
!	<NO STATUS RETURNED>
! INPUT ARGS MODIFIED:
!	RECORD DESCRIPTOR:
!		<NONE>
! ROUTINES CALLED:
!	<NONE>
    BEGIN

    MAP
	recdesc : REF BLOCK,
	sidrptr : REF BLOCK;

    REGISTER
	keysizeinwords;				! SIZE OF KEY STRING

    TRACE ('MAKESIDR');

    !+
    !    STORE THE FLAGS AND THE ID OF THE SIDR
    !-

    keysizeinwords = .kdb [kdbkszw];		! GET THIS NOW
    sidrptr [drflags] = defsidrflags;
    sidrptr [drrecordid] = idofrfa (.recdesc [rdrfa]);
    sidrptr [sidrrecsize] = .keysizeinwords + 1;	! KEY + 1 PTR
    sidrptr [sidrdupcount] = 0;			! FOR FUTURE
    sidrptr = .sidrptr + sidrhdrsize;

    !+
    !    MOVE THE KEY STRING INTO THE RECORD
    !-

    movewords (.recdesc [rduserptr], 		! From
	.sidrptr, 				! To
	.keysizeinwords);			! Size

    !+
    !    BUMP PTR PAST THE DATA PORTION
    !-

    sidrptr = .sidrptr + .keysizeinwords;
    sidrptr [wholeword] = .recdesc [rdrrv];	! STORE PTR
    RETURN
    END;					! End MAKESIDR
%SBTTL 'BLDCSIDR - make continuation SIDR'

GLOBAL ROUTINE bldcsidr (recdesc, sidrbd, newbd) =
! BLDCSIDR
! ========
! ROUTINE TO BUILD A CONTINUATION SECONDARY INDEX DATA RECORD (SIDR)
!	THIS ROUTINE IS CALLED WHEN THE CURRENT BUCKET BECOMES FILLED
!	WITH OTHER RECORDS (MAYBE DUPLICATES OF THIS KEY VALUE), AND
!	A NEW SIDR IS NEEDED. THIS SIDR IS ALLOCATED IN ITS OWN
!	BUCKET WHICH IS THEN <NOT> ENTERED INTO THE INDEX STRUCTURE.
!	THIS MEANS THAT THE INDEX WILL CONTAIN ONE INDEX RECORD
!	WHICH REPRESENTS MORE THAN ONE DATA BUCKET...NAMELY ALL
!	THOSE BUCKETS WHICH CONTAIN A SINGLE CONTINUATION SIDR
!	FOR THIS KEY.  THUS, ONCE A CONTINUATION SIDR HAS BEEN
!	BUILT IN A PARTICULAR BUCKET, NO OTHER RECORDS ARE
!	ENTERED INTO THE BUCKET. THAT SIDR WILL CONTINUE TO GROW
!	UNTIL IT FILLS THE BUCKET...AT WHICH TIME A NEW CONTINUATION
!	SIDR IS BUILT IN A NEW BUCKET.
!
!	THIS ROUTINE DOES THE FOLLOWING:
!
!		1.	ALLOCATE A NEW BUCKET TO USE
!		2.	LINK IT INTO THE BUCKET CHAIN
!		3.	BUILD A NEW SIDR AT THE TOP OF IT.
!
! NOTES:
!
!	1.	A CONTINUATION SIDR LOOKS JUST LIKE THE INITIAL SIDR.
!		IF DUP COUNTS ARE EVER SUPPORTED, THAT FIELD IN THE
!		CONTINUATION SIDR CAN BE USED FOR SOME OTHER PURPOSE
!		SINCE THE DUP COUNT IS NEEDED ONLY IN THE INITIAL
!		SIDR RECORD.
!
!	2.	THE COUNT FIELD IN THE RECORD DESC. IS NOT ALTERED
!		HERE, SO IF A SIDR BUCKET IS SPLITTING, WHOEVER CALLS
!		THIS ROUTINE MUST UPDATE THE COUNT FIELD.
! INPUT:
!	RECDESC		RECORD DESCRIPTOR PACKET
!		RRV		RECORD POINTER TO USE
!		RECPTR		<IGNORED>
!
!	SIDRBD		BUCKET DESCRIPTOR OF SIDR BUCKET (OLD BUCKET)
!	NEWBD		BUCKET DESCRIPTOR OF NEW BUCKET (RETURNED)
! OUTPUT:
!	TRUE:	OK, SIDR CREATED
!	FALSE:	ERROR
!		NO MORE BUCKET LEFT
!		BUCKET BUSY
! ROUTNES CALLED:
!	ALCBKT
!	MAKESIDR
    BEGIN

    MAP
	recdesc : REF BLOCK,
	sidrbd : REF BLOCK,
	newbd : REF BLOCK;

    LOCAL
	bktsize,				! SIZE OF THIS BUCKET
	thislevel,				! LEVEL OF THIS BUCKET
	newflags,				! FLAGS FOR NEW BUCKET
	tptr : REF BLOCK;

    REGISTER
	oldbktptr : REF BLOCK,			! PTR TO OLD SIDR BUCKET
	newbktptr : REF BLOCK;

    TRACE ('BLDCSIDR');
    oldbktptr = .sidrbd [bkdbktadr];		! GET SOME POINTERS
    newflags = .oldbktptr [bhflags] AND bhflgend;	! SAVE END BIT

    !+
    !    ALLOCATE A NEW BUCKET
    !-

    IF alcbkt (btypedata, 			! Type
	    .newflags, 				! Flags
	    datalevel, 				! Level
	    .newbd) EQL false			! Bucket
    THEN
	RETURN false;

!+
!    WE NOW HAVE A BUCKET. FIRST, WE MUST CLEAR THE END
!    BIT OF THE OLD BUCKET
!-
    clrflag (oldbktptr [bhflags], bhflgend);

    !+
    !    LINK THIS BUCKET INTO THE CHAIN
    !-

    newbktptr = .newbd [bkdbktadr];
    newbktptr [bhnextbkt] = .oldbktptr [bhnextbkt];	! MOVE VALUE OVER
    oldbktptr [bhnextbkt] = .newbd [bkdbktno];	! LINK TO LAST ONE

    !+
    !    NOW, CREATE A NEW SIDR RECORD AT THE TOP OF THE BUCKET
    !-

    tptr = .newbktptr + bhhdrsize;		! STORE IN LOCAL
    recdesc [rdrecptr] = .tptr;			! RETURN IT TO CALLER

    !+
    !    ALLOCATE RFA FOR SIDR RECORD
    !-

    recdesc [rdrfa] = alcrfa (.newbd);
    makesidr (.recdesc, .tptr);

    !+
    !    BUMP THE BUCKET HEADER DATA
    !-

    newbktptr [bhnextbyte] = 			! Add new length
    .newbktptr [bhnextbyte] + (sidrhdrsize + .kdb [kdbkszw] + 1);
    RETURN true
    END;					! End BLDCSIDR
%SBTTL 'DOSIDR - perform SIDR insertion'

GLOBAL ROUTINE dosidr (recdesc, sidrbd, splitbd) =
! DOSIDR
! ======
! ROUTINE TO PERFORM THE ACTUAL INSERTION OF A SIDR RECORD.
!	THIS ROUTINE DETERMINES WHETHER THE INSERTION WILL
!	CAUSE THE CREATION OF A BRAND NEW SIDR RECORD, A
!	CONTINUATION RECORD (DUPS ALLOWED ONLY), OR JUST
!	THE ADDITION OF A RECORD POINTER THE THE END OF AN
!	EXISTING SIDR ARRAY.
!
!	NO INDEX MODIFICATION OR FILE BUCKET UPDATING IS DONE
!	WITHIN THIS ROUTINE
! INPUT:
!	RECDESC		RECORD DESCRIPTOR PACKET
!		RRV		RECORD POINTER TO INSERT INTO SIDR
!		RECPTR		ADDRESS OF SEARCH TERMINATION
!				(I.E., 1ST RECORD WITH KEY > K(S) )
!		LASTRECPTR	RECORD BEFORE SEARCH TERMINATION RECORD
!
!	SIDRBD		BUCKET DESCRIPTOR OF CURRENT SIDR BUCKET
!	SPLITBD		BUCKET DESCRIPTOR OF EXTRA BUCKET (RETURNED)
! OUTPUT:
!	TRUE:	OK, SIDR IS INSERTED
!	FALSE:	ERROR
!		NO MORE BUCKETS
!		BUCKET BUSY
! INPUT ARGS MODIFIED:
!	RECORD DESCRIPTOR:
!		RECPTR		ADDRESS OF THE SIDR RECORD
!		SIDRELEMENT	OFFSET INTO SIDR OF CURRENT RECORD POINTER
!
! NOTES:
!
!	1.	IF NO DUP RECORDS WERE SEEN, THEN RECPTR POINTS TO
!		THE PLACE WHERE WE NEED TO INSERT THE NEW SIDR
!		RECORD. IF DUPS WERE SEEN, THEN RECPTR POINTS TO
![12]		THE FINAL DUPLICATE SIDR ARRAY (INCLUDING CONTINUATIONS),
![12]		AND LASTRECPTR HAS BEEN RESET TO POINT TO THE PREVIOUS SIDR.
    BEGIN

    MAP
	recdesc : REF BLOCK,
	sidrbd : REF BLOCK,
	splitbd : REF BLOCK;

    LABEL
	loop;

    REGISTER
	sidrptr : REF BLOCK,			! PTR TO CURRENT SIDR
	tptr : REF BLOCK,			! TEMP POINTER
	tempac;					! TEMP AC

    LOCAL
	topofbktptr : REF BLOCK,		! PTR TO TOP OF CURRENT BUCKET
	endbktptr : REF BLOCK,			! PTR TO END OF CURRENT BUCKET
	dataptr : REF BLOCK,			! PTR TO DATA PORTION OF SIDR
	freespace,				! AMOUNT OF SPACE LEFT IN THIS BUCKET
	dummybd : BLOCK [bdsize],		! DUMMY BKT DESC USED FOR SPLIT
	keysizeinwords,				! SAME AS IN KDB
	savestatus,				! Save status of a routine
	endofsidrptr : REF BLOCK,		! Ptr to end of current SIDR
	keybuffptr : REF BLOCK;			! Ptr to RST key buffer

    TRACE ('DOSIDR');

    !+
    !    SET UP SOME BUCKET POINTERS
    !-

    topofbktptr = .sidrbd [bkdbktadr];
    freespace = (.kdb [kdbdbkz]^b2w) - (endbktptr = .topofbktptr [bhnextbyte]);
    lookat ('	FREE-SPACE: ', freespace);
    endbktptr = .endbktptr + .topofbktptr;	! Form absolute ptr to end
!+
!    DID WE SEE A DUPLICATE RECORD? IF SO, THEN WE NEED
!    TO TRY TO ADD ONE MORE POINTER TO THE ARRAY. IF NOT,
!    WE MUST CREATE AN ENTIRELY NEW SIDR RECORD
!-

    IF duplicateflag (recdesc) EQL 0
    THEN 					! First insert of this key
	BEGIN

	!+
	!    INDICATE THAT THE CURRENT POINTER IS FIRST IN ARRAY
	!-

	recdesc [rdsidrelement] = 1;
	RETURN bldisidr (.recdesc, .sidrbd, .splitbd)
	END;

    !+
    !    WE HAVE ALREADY PROCESSED A DUP OF THIS KEY VALUE
    !-

%IF dbug
%THEN

    IF (chkflag (kdb [kdbflags], flgdup) EQL 0) THEN rmsbug (msgflags);

%FI

!** [12] ROUTINE:DOSIDR AT LINE 7013, EGM, 3-APR-78
    sidrptr = .recdesc [rdrecptr];		! GET ADDRESS OF LAST SIDR
    lookat ('	CURRENT SIDR REC EQL AT: ', sidrptr);

    !+
    !    CHECK THAT IT IS IN THE CURRENT BUCKET
    !-

    IF ((.sidrptr LEQ .topofbktptr) OR (.sidrptr GTR .endbktptr)) THEN rmsbug (msgptr);

!+
!    UNLESS THIS BUCKET IS COMPLETELY FILLED, WE CAN ALWAYS
!    FIT ONE MORE RECORD POINTER INTO THE ARRAY. THEREFORE,
!    WE MUST DETERMINE IF THE BUCKET IS FULL AND IF NOT,
!    WE WILL MORE THE BOTTOM DOWN AND INSERT THE RECORD
!    POINTER. IF SO, WE MUST EITHER SPLIT THE BUCKET OR
!    CREATE A CONTINUATION SIDR
!-
    keysizeinwords = .kdb [kdbkszw];		! MAKE THIS HANDY
    dataptr = .sidrptr + sidrhdrsize;		! GET PTR TO DATA PORTION OF SIDR
    endofsidrptr = .dataptr + .sidrptr [sidrrecsize] - 1;

    !+
    !    COMPUTE THE OFFSET INTO THE SIDR OF THE CURRENT POINTER
    !-

    recdesc [rdsidrelement] = .endofsidrptr - .dataptr - .keysizeinwords + 1;

    IF .freespace LEQ 0				!**[6]**MAY BE NEGATIVE IF COMPLETELY FULL
    THEN 					! The bucket is completely full
	BEGIN
	rtrace (%STRING ('	BKT EQL FULL...', %CHAR (13), %CHAR (10)));
!+
!    WE CAN'T FIT THE NEW SIDR IN THE BUCKET, SO
!    WE MUST SPLIT. HOWEVER, IF THIS ARRAY IS
!    THE LAST RECORD IN THE BUCKET, THEN WE
!    DON'T WANT TO SPLIT THE BUCKETS EVENLY
!    BECAUSE THAT WOULD UNNECESSARILY DISTRIBUTE
!    DUP RECORDS ACROSS BUCKETS. WHAT WE NEED TO
!    DO IS TO BUILD A CONTINUATION RECORD IN A
!    NEW BUCKET BY ITSELF. THEN, IT WILL GROW
!    UNTIL IT FILLS UP THAT BUCKET, THEN ANOTHER
!    CONTINUATION WILL BE ALLOCATED, ETC.
!-

	IF (.endofsidrptr + 1) EQL .endbktptr
	THEN 					! We need a continuation record
	    BEGIN
	    rtrace (%STRING ('	BUILDING CONT. RECORD', %CHAR (13), %CHAR (10)));
	    savestatus = bldcsidr (.recdesc, .sidrbd, .splitbd);
!+
!    WE MUST INSURE THAT THE CONTINUATION SIDR
!    GETS WRITTEN OUT, BUT IT SHOULD NOT BE
!    ENTERED INTO THE INDEX.
!-
	    recdesc [rdcount] = 1;		! BKT WILL BE UPDATED
	    RETURN .savestatus
	    END;

	recdesc [rdlength] = 0;			! JUST SPLIT, DONT INSERT

	!+
	!    SPLIT THE SIDR BUCKET
	!-

	IF split (.recdesc, .sidrbd, .splitbd, dummybd) EQL false THEN RETURN false;

!+
!    WE NOW MUST ASSIGN NEW ID'S FOR ALL THE SIDR
!    RECORDS WHICH MOVED TO THE NEW BUCKET.
!-
	alcnewids (.splitbd);
!+
!    CHECK TO SEE IF THE SIDR MOVED TO THE NEW
!    BUCKET
!-
!+
!    NOW, THE SIDR IS EITHER IN THE CURRENT BUCKET
!    OR IT WAS MOVED TO THE TOP OF THE NEXT BUCKET.
!    THIS IS TRUE BECAUSE THE SPLIT ALGORITHM ALWAYS
!    TRIES TO KEEP R-NEW ON THE CURRENT BUCKET AND
!    SINCE THE SIZE OF R-NEW WAS ZERO, THIS WILL ALWAYS
!    BE TRUE. SO, WE MUST CHECK RECPTR AND IF IT POINTS
!    TO THE END OF THIS BUCKET, THEN WE KNOW THE SIDR
!    IS REALLY AT THE TOP OF THE NEXT BUCKET.
!-

	IF (.sidrptr - .topofbktptr) EQL (.topofbktptr [bhnextbyte])
	THEN 					! SIDR to top of next bucket
	    BEGIN
	    sidrptr = .splitbd [bkdbktadr] + bhhdrsize;
	    rtrace (%STRING ('	SIDR MOVED TO NEW BKT', %CHAR (13), %CHAR (10)));
	    topofbktptr = .splitbd [bkdbktadr];
!** [12] ROUTINE:DOSIDR AT LINE 7106, EGM, 3-APR-78
	    endofsidrptr = .sidrptr + sidrhdrsize + .sidrptr [sidrrecsize] - 1
	    END;

	!+
	!    RDLASTRECPTR NOW POINTS TO THE LAST SIDR ARRAY
	!    IN THE ORIGINAL BUCKET, HAVING BEEN RESET
	!    BY SPLIT (SIDR IN OLD) OR LEFT AS RECIEVED FROM
	!    PUTSIDR (SIDR IN NEW).
	!    MOVE THIS NEW HIGH KEY VALUE INTO THE RST
	!    KEY BUFFER.
	!-

	tptr = .recdesc [rdlastrecptr] + sidrhdrsize;
	keybuffptr = .rst [rstkeybuff] + (.fst [fstkbfsize]/2);
	movewords (.tptr, 			! From
	    .keybuffptr, 			! To
	    .kdb [kdbkszw])			! Size
	END;

    !+
    !    RE-COMPUTE THE ENDOF THIS BUCKET DATA
    !-

    endbktptr = .topofbktptr + .topofbktptr [bhnextbyte];

    !+
    !    MOVE THE DATA DOWN IN THE BUCKET
    !-

    tempac = .endbktptr - .endofsidrptr - 1;	! COMPUTE HOW MUCH TO MOVE

    IF .tempac NEQ 0
    THEN 					! We must move some data down
	BEGIN
	movedown ((.endofsidrptr + 1), 		! Start
	    .endbktptr - 1, 			! End
	    1)					! Size
	END;

    !+
    !    BUMP THE END-OF-BUCKET INDICATOR
    !-

    topofbktptr [bhnextbyte] = .topofbktptr [bhnextbyte] + 1;

    !+
    !    STORE THE NEW RECORD POINTER
    !-

    endofsidrptr [1, wrd] = .recdesc [rdrrv];

    !+
    !    BUMP THE SIZE OF THIS SIDR RECORD
    !-

    sidrptr [sidrrecsize] = .sidrptr [sidrrecsize] + 1;

    !+
    !    RESET RECPTR TO POINT TO THE LOCATION OF THE SIDR
    !-

    recdesc [rdrecptr] = .sidrptr;
    RETURN true
    END;					! End DOSIDR
%SBTTL 'INSRTSIDR - insert SIDR'

GLOBAL ROUTINE insrtsidr (recdesc, sidrbd, splitbd) =
! INSRTSIDR
! =========
! ROUTINE TO INSERT A SECONDARY DATA RECORD (SIDR).
!	THIS ROUTINE ACTUALLY IS THE OUTER-LEVEL ROUTINE
!	WHICH GUIDES THE INSERTION OF THE SIDR. IT PERFORMS
!	NO DATA MANIPULATION OR RECORD CREATION. SUCH
!	ACTIONS ARE DONE BY "DOSIDR".  THIS ROUTINE SIMPLY
!	CALLS DOSIDR AND THEN UPDATES ANY FILE PAGES
!	WHICH NEED TO BE WRITTEN TO THE FILE.
! INPUT:
!	RECDESC		RECORD DESCRIPTOR PACKET
!		RRV		RECORD POINTER TO INSERT INTO SIDR
!		RECPTR		ADDRESS OF SEARCH TERMINATION
!				(I.E., 1ST RECORD WITH K > K(S) )
!		LASTRECPTR	RECORD BEFORE SEARCH TERMINATION RECORD
!
!	SIDRBD		BUCKET DESCRIPTOR OF CURRENT SIDR BUCKET
!	SPLITBD		BUCKET DESCRIPTOR OF EXTRA BUCKET (RETURNED)
! OUTPUT:
!	TRUE:	SIDR RECORD INSERTED PROPERLY AND FILE UPDATED
!	FALSE:	ERROR
!		NO MORE BUCKETS
! ROUTINES CALLED:
!	DOSIDR
    BEGIN

    MAP
	recdesc : REF BLOCK,
	sidrbd : REF BLOCK,
	splitbd : REF BLOCK;

    TRACE ('INSRTSIDR');

    !+
    !    CLEAR THE NUMBER OF NEW SPLIT BUCKETS
    !-

    recdesc [rdcount] = 0;

    !+
    !    DO THE INSERTION
    !-

    IF dosidr (.recdesc, 			! Rec desc
	    .sidrbd, 				! Bucket
	    .splitbd) EQL false			! Split bucket

	!+
	!    WHAT HAPPENED?
	!-

    THEN
	RETURN false;

    !+
    !    IF WE SPLIT, THEN WE MUST UPDATE THE NEW FILE BUCKET
    !-

    IF .recdesc [rdcount] EQL 1
    THEN
	putbkt (true, 				! Update
	    .splitbd);				! Bucket

    !+
    !    UPDATE THE BUCKET IN WHICH THE SIDR WAS INSERTED
    !-

    putbkt (true, 				! Update
	.sidrbd);				! Bucket
    RETURN true
    END;					! End INSRTSIDR
%SBTTL 'BLDISIDR - build first SIDR'

GLOBAL ROUTINE bldisidr (recdesc, sidrbd, splitbd) =
! BLDISIDR
! ========
! ROUTINE TO BUILD THE FIRST INSTANCE OF A SPECIFIC SECONDARY
!	DATA RECORD. THIS ROUTINE IS CALLED ONLY WHEN THE SIDR
!	RECORD IS BEING INITIALLY CREATED. CONTINUATION SIDR'S
!	ARE CREATED ONLY BY "BLDCSIDR".
! INPUT:
!	RECDESC		RECORD DESCRIPTOR PACKET
!		RRV		RECORD POINTER TO USE
!		RECPTR		ADDRESS TO INSERT SIDR
!
!	SIDRBD		BUCKET DESCRIPTOR OF SIDR BUCKET (OLD BUCKET)
!	NEWBD		BUCKET DESCRIPTOR OF NEW BUCKET (RETURNED)
!
! OUTPUT:
!	TRUE:	SIDR INSERTED CORRECTLY
!	FALSE:	SIDR COULD NOT BE INSERTED (ERROR CODE IS IN USRSTS)
!
! ROUTINES CALLED:
!	SPLIT
!	MAKESIDR
!	ALCNEWIDS
    BEGIN

    MAP
	recdesc : REF BLOCK,
	sidrbd : REF BLOCK,
	splitbd : REF BLOCK;

    REGISTER
	ptrac : REF BLOCK,
	bktptr : REF BLOCK,			! PTR TO TOP OF CURRENT BUCKET
	tempac;

    LOCAL
	endptr : REF BLOCK,			! PTR TO END OF CURRENT BUCKET
	insertptr : REF BLOCK,			! PTR TO PLACE TO INSERT NEWSIDR
	dummybd : BLOCK [bdsize],		! DUMMY BKT DESC FOR SPLIT
	currentbd : BLOCK [bdsize],		! CURRENT BUCKET
	splitflag,				! FOR IS ON IF WE SPLI THE BUCKET
	maxoffset,				! OFFSET INTO BUCKET TO DETERMINE IF FULL
	keybuffptr : REF BLOCK,			! PTR TO RST KEY BUFFER
	spaceneeded;				! SIZE OF NEW SIDR

    TRACE ('BLDISIDR');

    !+
    !    ASSUME NO SPLITS
    !-

    splitflag = false;
!+
!    SET UP SOME POINTERS AND FIGURE OUT HOW MUCH SPACE
!    WE HAVE LEFT IN THIS BUCKET
!-
    insertptr = .recdesc [rdrecptr];
    bktptr = .sidrbd [bkdbktadr];		! ADDRESS OF BUCKET
    recdesc [rdlength] = (spaceneeded = sidrhdrsize + .kdb [kdbkszw] + 1);
    lookat ('	SPACE-NEEDED: ', spaceneeded);

    !+
    !    CAN THIS NEW SIDR FIT ONTO THE BUCKET?
    !-

    maxoffset = .kdb [kdbdbkz]^b2w;		! FIND MAX SIZE OF BUCKET

    IF (chkflag (rab [rabrop, 0], roploa) NEQ 0)
    THEN 					! User specified fill percent
	maxoffset = .kdb [kdbdfloffset];

    !+
    !    WILL THE NEW SIDR FIT IN THIS BUCKET?
    !-

    IF (.bktptr [bhnextbyte] + .spaceneeded) GTR .maxoffset
    THEN 					! We must split the SIDR bucket
	BEGIN
	rtrace (%STRING ('	SIDR WONT FIT...', %CHAR (13), %CHAR (10)));

	!+
	!    SPLIT THE SIDR BUCKET
	!-

	IF split (.recdesc, .sidrbd, .splitbd, dummybd) EQL false

	    !+
	    !    WHAT HAPPENED?
	    !-

	THEN
	    RETURN false;

	splitflag = 1;				! SET THIS FLAG FOR LATER

%IF dbug
%THEN

	IF .recdesc [rdcount] GEQ 2 THEN rmsbug (msgsplit);

%FI

!+
!    DETERMINE IF THE INSERTION POINT WAS MOVED
!    TO THE NEW BUCKET
!-
	insertptr = .recdesc [rdrecptr];	! FETCH ADDR OF SIDR
	END
    ELSE 					! SIDR can fit in this bucket
	BEGIN
!+
!    WE NOW MUST LOCATE THE END OF THE DATA IN THE
!    CURRENT BUCKET
!-
	endptr = .bktptr + .bktptr [bhnextbyte];

	!+
	!    COMPUTE AMOUNT OF DATA TO MOVE DOWN
	!-

	tempac = .endptr - .insertptr;
	lookat ('	AMOUNT-TO-MOVE: ', tempac);

%IF dbug
%THEN

	IF .tempac LSS 0 THEN rmsbug (msgcount);

%FI

	IF .tempac NEQ 0
	THEN
	    BEGIN
	    movedown (.insertptr, 		! Start
		.endptr - 1, 			! End
		.spaceneeded)			! Size
	    END;

!+
!    ALLOCATE AN RFA FOR THE NEW SIDR (SPLIT ALREADY
!    DID THIS FOR US IF THE BUCKET SPLIT)
!-
	recdesc [rdrfa] = alcrfa (.sidrbd);

	!+
	!    BUMP THE BUCKET HEADER NEXT-BYTE VALUE
	!-

	bktptr [bhnextbyte] = .bktptr [bhnextbyte] + .spaceneeded;
	END;

    !+
    !    CREATE THE SIDR RECORD
    !-

    makesidr (.recdesc, .insertptr);

    !+
    !    IF WE DIDNT'T SPLIT THE SIDR BUCKET, THEN WE CAN EXIT
    !-

    IF .splitflag EQL false THEN RETURN true;

!+
!    WE NOW MUST ASSIGN ID'S FOR ALL SIDR RECORDS WHICH
!    MOVED TO THE NEW BUCKET. WE ALSO MUST MOVE THE NEW
!    HIGH-KEY VALUE IN THE ORIGINAL BUCKET INTO THE KEY
!    BUFFER (THE BOTTOM HALF OF IT) SO THAT "INDEX-UPDATE"
!    WILL KNOW WHAT KEY TO PUT IN THE OLD INDEX RECORD.
!    NOTE THAT THE MOVING OF THIS KEY MUST BE DONE AFTER
!    THE NEW SIDR IS CREATED SINCE THE NEW RECORD TO BE
!    INSERTED MAY BE THE NEW HIGH-KEY RECORD.
!-

    !+
    !    **NOTE THAT THE INDEX-UPDATE FLAG BIT WAS SET BY SPLIT***
    !-

!+
!    WE NOW MUST MOVE THE NEW HIGH-KEY VALUE FOR THE
!    ORIGINAL BUCKET INTO THE RST KEY BUFFER
!-
    ptrac = .recdesc [rdlastrecptr] + sidrhdrsize;	! PTR TO KEY
    keybuffptr = .rst [rstkeybuff] + (.fst [fstkbfsize]^divideby2lsh);
    movewords (.ptrac, 				! From
	.keybuffptr, 				! To
	.kdb [kdbkszw]);			! Size
!+
!    WE NOW MUST ASSIGN NEW ID'S FOR ALL THE SIDR
!    RECORDS WHICH MOVED TO THE NEW BUCKET.
!-
    alcnewids (.splitbd);
    RETURN true
    END;					! End BLDISIDR
%SBTTL 'DELSIDR - delete record pointer'

GLOBAL ROUTINE delsidr (recdesc) =
! DELSIDR
! =======
! ROUTINE TO DELETE A SINGLE RECORD-POINTER FROM THE SECONDARY
!	INDEX DATA RECORDS. THIS ROUTINE IS CALLED WHENEVER
!	A $PUT TO AN INDEXED FILE RESULTS IN AN ERROR DURING
!	PROCESSING OF ONE OF THE SECONDARY INDICES. IN SUCH A
!	CASE, ALL THE PREVIOUS SECONARY INDICES MUST BE MODIFIED
!	SO THAT THE RECORD IS REMOVED.
!
!	IF THE SECONDARY INDEX ALLOWS DUPLICATES, THEN EACH SIDR
!	POINTER ARRAY MUST BE SCANNED UNTIL THE CORRECT ENTRY IS
!	FOUND AND THEN IT CAN BE DELETED. IF NO DUPLICATES ARE
!	ALLOWED, THEN THE ENTIRE SECONDARY DATA RECORD CAN BE
!	SQUEEZED FROM THE BUCKET.
! INPUT:
!	RECDESC		RECORD DESCRIPTOR PACKET
!		USERPTR		ADDRESS OF SEARCH KEY STRING
!		USERSIZE	SIZE OF SEARCH KEY STRING
!		RRV		RFA OF RECORD TO BE DELETED
! OUTPUT:
!	TRUE:	RECORD FOUND AND DELETED
!	FALSE:	ERROR
!		RECORD NOT FOUND
!
! NOTES:
!
!	1.	THE INDEX MUST BE LOCKED WHEN THIS ROUTINE IS CALLED.
! ROUTINES CALLED:
!	FNDREC
    BEGIN

    MAP
	recdesc : REF BLOCK;

    REGISTER
	sidrptr : REF BLOCK,			! PTR TO CURRENT SIDR
	arrayptr : REF BLOCK;			! PTR TO SIDR POINTER ARRAY

    LOCAL
	sidrbd : BLOCK [bdsize],		! BKT DESC FOR SIDR BUCKETS
	dummybd : BLOCK [bdsize],		! A TEMPORARY BKT DESCRIPTOR
	recordpointer,				! RFA TO SEARCH FOR
	dummyptr : REF BLOCK,			! USED TO PASS SIDRPTR AS LOCAL
	bktptr : REF BLOCK,			! PTR TO CURRENT SIDR BUCKET
	endptr : REF BLOCK,			! PTR TO END OF CURRENT BUCKET
	amounttomove,				! AMOUNT OF DATA TO SQUEEZE
	ptrcount,				! # OF PTRS IN CURRENT ARRAY
	offsettoptrs,				! OFFSET TO PTRS IN SIDR ARRAY
	savedstatus;				! RESULTS OF A ROUTINE

!EXTERNAL
!    SQUEEZESIDR;

    LABEL
	bigloop;				! LABELS

    TRACE ('DELSIDR');

    !+
    !    CHECK A FEW THINGS
    !-

%IF dbug
%THEN

    IF .kdb [kdbref] EQL refprimary THEN rmsbug (msginput);

%FI

    !+
    !    SET UP THE RFA OF OUR TARGET RECORD
    !-

    recordpointer = .recdesc [rdrrv];
!+
!    WE WILL TRY TO SEARCH THE ENTIRE INDEX AND POSITION
!    TO THE SIDR RECORD
!-

    IF fnddata (.recdesc, 			! Record
	    sidrbd) EQL false			! Bucket
    THEN
	RETURN false;

    !+
    !    DID WE STOP AT THE DATA LEVEL?
    !-

    IF .recdesc [rdlastlevel] NEQ datalevel THEN RETURN false;

!+
!    AT THIS POINT, WE WILL DEFINE A DUMMY BLOCK WHICH
!    WE WILL BE ABLE TO EXIT FROM.
!-
bigloop :
    BEGIN
!+
!    THE RECORD WAS EITHER NOT FOUND, OR THERE WAS AN
!    EXACT MATCH. CHECK IF THE RECORD WAS FOUND
!-

    IF chkflag (recdesc [rdstatus], rdflgpst + rdflglss) NEQ 0
    THEN 					! The record wasn't found
	LEAVE bigloop WITH (savedstatus = false);

!+
!    WE HAVE FOUND AN EXACT MATCH. WE MUST NOW CHECK IF WE
!    CAN FIND THE RECORD POINTER IN THIS ARRAY.
!-
    sidrptr = .recdesc [rdrecptr];		! GET PTR TO SIDR
    offsettoptrs = sidrhdrsize + .kdb [kdbkszw];	! COMPUTE THIS NOW
!+
!    IF NO DUPS ARE ALLOWED, THEN WE MUST COMPARE OUR
!    SEARCH KEY RECORD ADDRESS WITH THE ONE IN THIS SIDR.
!-

    IF chkflag (kdb [kdbflags], flgdup) EQL 0
    THEN 					! No dups are allowed
	BEGIN
	rtrace (%STRING ('	SEARCHING THIS SIDR...', %CHAR (13), %CHAR (10)));
	arrayptr = .sidrptr + .offsettoptrs;	! PTR TO RFA'S

	IF .arrayptr [wholeword] NEQ .recordpointer
	THEN 					! The record wasn't found
	    LEAVE bigloop WITH (savedstatus = false);

	!+
	!    WE CAN SET THIS RFA TO BE DELETED
	!-

	dummyptr = .sidrptr;			! STORE PTR AS LOCAL
	squeezesidr (.dummyptr, sidrbd);
	savedstatus = true
	END
    ELSE 					! Dups are allowed
	BEGIN
!+
!    WE MUST SCAN ALL SIDR'S UNTIL WE FIND THE CORRECT
!    RECORD POINTER. WE MAY HIT THE END OF THE CHAIN
!    FIRST, IN WHICH CASE WE MUST EXIT WITH FAILURE.
!-
	repeat

	    BEGIN
	    rtrace (%STRING ('	SCANNING SIDR...', %CHAR (13), %CHAR (10)));
	    sidrptr = .recdesc [rdrecptr];	! GET SIDR PTR AGAIN
	    bktptr = .sidrbd [bkdbktadr];	! FETCH THIS AGAIN
	    endptr = .bktptr + .bktptr [bhnextbyte];
	    ptrcount = .sidrptr [sidrrecsize] - .kdb [kdbkszw];
	    arrayptr = .sidrptr + .offsettoptrs;	! GET PTR TO RFA'S
	    lookat ('	SIDRPTR: ', sidrptr);
	    lookat ('	# OF PTRS: ', ptrcount);

	    !+
	    !    LOOP OVER ALL POINTERS IN THE ARRAY
	    !-

	    INCR j FROM 0 TO .ptrcount - 1 DO
		BEGIN

		IF (.arrayptr [wholeword] AND ( NOT allrfaflags)) EQL .recordpointer
		THEN
		    BEGIN
		    lookat ('	FOUND RFA AT: ', arrayptr);

		    !+
		    !    NOTE NO CHECK FOR SIDR ALREADY DELETED
		    !-

		    setupd (sidrbd);		!INDIC THIS PG TO BE UPDATED
		    setdeletedrfa (arrayptr);
		    LEAVE bigloop WITH (savedstatus = true)
		    END;

		arrayptr = .arrayptr + 1;
		END;

!+
!    AT THIS POINT, WE DIDNT FIND THE RP IN
!    THE SIDR. SO, WE MUST CHECK IF THERE ARE
!    ANY CONTINUATION SIDR'S AND IF SO, WE MUST
!    SCAN ALL OF THEM TO SEE IF WE CAN FIND THE
!    CORRECT RFA.
!-
	    rtrace (%STRING ('	DIDNT FIND RFA IN SIDR...', %CHAR (13), %CHAR (10)));
	    lookat ('	ARRAY-PTR: ', arrayptr);

	    IF .arrayptr NEQ .endptr
	    THEN 				! No more continuation SIDRs
		LEAVE bigloop WITH (savedstatus = false);

!+
!    START THE SEARCH AT THE END OF THIS BUCKET.
!    ALSO, INDICATE THAT A HORIZONTAL SEARCH IS OK.
!-
	    rtrace (%STRING ('	SEARCHING FOR CONT SIDRS...', %CHAR (13), %CHAR (10)));
	    setflag (recdesc [rdflags], rdflghorizok);
	    recdesc [rdrecptr] = .endptr;
!+
!    WE MUST MOVE THE SIDR BUCKET DESCRIPTOR
!    TO A TEMP LOCATION TO INPUT IT TO FNDREC.
!-
	    movebktdesc (sidrbd, dummybd);
	    savedstatus = fndrec (.recdesc, dummybd, sidrbd);
!+
!    AT THIS POINT, FNDREC RETURNED A STATUS OF TRUE
!    UNLESS THERE WAS A FATAL PROBLEM (NO SPACE LEFT
!    FOR BUCKETS, ...). HOWEVER, WE MUST CHECK THE
!    STATUS BITS BECAUSE THE NEW RECORD MAY NOT
!    BE A CONTINUATION RECORD, OR THE END OF THE
!    BUCKET CHAIN MAY HAVE BEEN REACHED. IN ALL THESE
!    CASES, WE MUST EXIT FROM THE LOOP.
!-

	    IF (.savedstatus EQL false) OR 	!
		(chkflag (recdesc [rdstatus], rdflglss + rdflgpst) NEQ 0)
	    THEN 				! Not a continuation SIDR
		LEAVE bigloop WITH (savedstatus = false)

	    END

	END

    END;
!+
!    COME HERE WITH SAVEDSTATUS = STATUS OF OUR OPERATION.
!    WE MUST RELEASE THE CURRENT BUCKET AND RETURN
!    TO THE CALLER.
!-
!+
!    NOTE THAT WE WILL NOT WRITE OUT THIS BUCKET NOW.
!    IT IS VERY LIKELY THAT IT WILL GO OUT SOON, AND WE NEED
!    TO SAVE SOME TIME.
!-
    putbkt (false, 				! No update
	sidrbd);				! SIDR
    RETURN .savedstatus
    END;					! End DELSIDR
%SBTTL 'SQUEEZESIDR - compress out SIDR'

GLOBAL ROUTINE squeezesidr (sidrptr, sidrbd) : NOVALUE =
! SQUEEZESIDR
! ===========
! ROUTINE TO SQUEEZE A SINGLE SECONDARY DATA RECORD FROM A BUCKET.
!	THIS ROUTINE CAN ONLY BE CALLED IF THE SIDR CONTAINS ONLY
!	ONE RECORD POINTER.
! INPUT:
!	SIDRPTR		ADDRESS OF SIDR RECORD
!	SIDRBD		BUCKET DESCRIPTOR OF SIDR BUCKET
! OUTPUT:
!	<NO STATUS RETURNED>
! ROUTINES CALLED:
!	<NONE>
    BEGIN

    MAP
	sidrptr : REF BLOCK,
	sidrbd : REF BLOCK;

    REGISTER
	bktptr : REF BLOCK,			! PTR TO SIDR BUCKET
	endptr : REF BLOCK;			! PTR TO END OF SIDR BUCKET

    LOCAL
	amounttomove,				! DATA TO MOVE UP IN BUCKET
	sizeofsidr;				! SIZE OF SIDR HEADER AND KEY

    TRACE ('SQUEEZESIDR');

    !+
    !    PICK UP THE BUCKET ADDRESS AND FIND END OF BUCKET
    !-

    setupd (sidrbd);				!INDIC THIS PG TO BE UPDATED
    bktptr = .sidrbd [bkdbktadr];
    endptr = .bktptr + .bktptr [bhnextbyte];
    sizeofsidr = sidrhdrsize + .kdb [kdbkszw] + 1;
    amounttomove = .endptr - .sidrptr - .sizeofsidr;
    lookat ('	AMOUNT-TO-MOVE: ', amounttomove);
    lookat ('	END OF BKT: ', endptr);

    IF .amounttomove NEQ 0
    THEN 					! We have some to move
	BEGIN
	rtrace (%STRING ('	SQUEEZING BUCKET...', %CHAR (13), %CHAR (10)));
	movewords (.sidrptr + .sizeofsidr, 	! From
	    .sidrptr, 				! To
	    .amounttomove)			! Size
	END;

    !+
    !    UPDATE THE BUCKET HEADER INFO
    !-

    bktptr [bhnextbyte] = .bktptr [bhnextbyte] - .sizeofsidr;
    RETURN
    END;					! End SQUEEZE-SIDR
%SBTTL 'PUTSIDR - insert secondary key'

GLOBAL ROUTINE putsidr (recdesc) =
! PUTSIDR
! =======
! ROUTINE TO INSERT A KEY FROM THE USER DATA RECORD INTO A
!	SECONDARY INDEX. THIS ROUTINE IS CALLED FROM $PUT
!	AND $UPDATE WHENEVER A NEW KEY IS BEING INSERTED
!	INTO THE FILE. THE USER DATA RECORD MUST ALREADY HAVE
!	BEEN CHECK TO MAKE SURE IT IS BIG ENOUGH TO HOLD THE
!	ENTIRE KEY STRING FOR THIS KEY OF REFERENCE.
! INPUT:
!	RECDESC		RECORD DESCRIPTOR PACKET
!		RRV		RECORD ADDRESS TO INSERT INTO SECONDARY INDEX
! OUTPUT:
!	TRUE:	OK...RECORD INSERTED INTO SECONDARY INDEX
!	FALSE:	ERROR
! INPUT ARGS MODIFIED:
!
!	RECORD DESCRIPTOR:
!		STATUS		OPERATION STATUS BITS
!			FLGIDXERROR	INDEX UPDATE ERROR OCCURED
! ROUTINES CALLED:
!	MAKIDX
!	FOLLOWPATH
!	CHKDUP
!	INSRTSIDR
!	IDXUPDATE
! NOTES:
!
!	1.	KDB MUST BE SET UP ON ENTRY FOR THE CURRENT KEY.
!
!	2.	THE INDEX MUST BE LOCKED WHEN THIS ROUTINE IS CALLED.
    BEGIN

    MAP
	recdesc : REF BLOCK;

    LABEL
	loop;

    LOCAL
	userrecordptr : REF BLOCK,		! PTR TO USER DATA RECORD
	seckeybuffer : VECTOR [maxkszw],	! TEMP BUFFER FOR SEC KEY
	bktdesc : BLOCK [bdsize],		! BUCKET DESC FOR SIDR BUCKET
!** [12] ROUTINE:PUTSIDR AT LINE 7725, EGM, 3-APR-78
	splitbd1 : BLOCK [bdsize],		! BKT DESC FOR SPLITS
	oldlastrecptr;				! SAVED PTR TO LAST SIDR ARRAY

!EXTERNAL
!    FOLLOWPATH,			! TRAVERSE THE INDEX
!    CHKDUP,					! CHECK FOR DUPS
!    MAKIDX,					! CREATE A NEW INDEX
!    MOVEKEY,				! MOVE THE SEC KEY INTO BUFFER
!    INSRTSIDR,				! INSERT THE NEW SIDR
!    IDXUPDATE;				! UPDATE THE INDEX
    TRACE ('PUTSIDR');

    !+
    !    CHECK IF THERE IS AN INDEX
    !-

    IF noindexflag NEQ 0
    THEN
	BEGIN
	makidx ();				! MAKE ONE

	!+
	!    IF THE NO-INDEX IS STILL ON, THERE WAS A PROBLEM
	!-

	IF noindexflag NEQ 0 THEN RETURN false

	END;

    !+
    !    FETCH THE ADDRESS OF THE USER'S NEW RECORD
    !-

    userrecordptr = .rab [rabrbf, 0];

    IF .userrecordptr<lh> EQL 0			! Section number?	!A415
    THEN 					!			!A415
	userrecordptr = .userrecordptr OR .blksec;	! Default section !A415

    !+
    !    MOVE THE SECONDARY KEY STRING TO THE TEMPORARY BUFFER
    !-

    movekey (.userrecordptr, 			! From
	seckeybuffer);				! To
    recdesc [rduserptr] = seckeybuffer;
    recdesc [rdusersize] = .kdb [kdbksz];

    !+
    !    ***NEXT INSTR ASSUMES RDFLAGS AND RDSTATUS ARE IN WORD 0
    !-

    recdesc [wholeword] = 0;

    !+
    !    SEARCH THE SECONDARY INDEX
    !-

    IF followpath (.recdesc, bktdesc) EQL false THEN RETURN false;

!** [12] ROUTINE:PUTSIDR AT LINE 7773, EGM, 3-APR-78

    !+
    !    SAVE THE LAST RECORD POINTER AROUND THE CALL TO CHKDUP
    !-

    oldlastrecptr = .recdesc [rdlastrecptr];

    !+
    !    CHECK FOR DUPLICATE VALUES
    !-

!+
!    WE MUST NOW INSERT THE SIDR RECORD INTO
!    THE SIDR BUCKET
!-
loop :
    BEGIN

    IF chkdup (.recdesc, bktdesc) NEQ false
    THEN
!** [12] ROUTINE:PUTSIDR AT LINE 7785, EGM, 3-APR-78
	BEGIN
!+
!   IF DUPLICATES WERE FOUND, BACKUP THE RECORD POINTERS
!   TO CORRECTLY POINT TO THE FINAL DUPLICATE SIDR ARRAY,
!   AND THE PREVIOUS SIDR ARRAY. THIS MUST BE DONE SO THAT
!   THE RST KEY BUFFER CAN BE UPDATED PROPERLY ON A SPLIT
!-

	IF duplicateflag (recdesc) NEQ 0
	THEN
	    BEGIN
	    recdesc [rdrecptr] = .recdesc [rdlastrecptr];
	    recdesc [rdlastrecptr] = .oldlastrecptr
	    END;

	IF insrtsidr (.recdesc, bktdesc, splitbd1) NEQ false	!
	THEN
	    LEAVE loop WITH true;

	END;

    BEGIN
    putbkt (false, bktdesc);
    RETURN false
    END;
    END;

    !+
    !    CHECK FOR INDEX UPDATE
    !-

    IF idxupdateflag (recdesc) NEQ 0
    THEN
	BEGIN

	IF idxupdate (.recdesc, bktdesc, splitbd1, 0)	! ONLY 1 EXTRA BKT
	    EQL false
	THEN

	!+
	!    WHAT HAPPENED?
	!-

	    setidxerrorflag (recdesc);		! SET THE FLAG

	END;

    !+
    !    RETURN AFTER INSERTING NEW SIDR RECORD
    !-

    RETURN true
    END;					! End PUTSIDR

END

ELUDOM