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Trailing-Edge - PDP-10 Archives - bb-lw55a-bm - language-sources/getput.bli
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MODULE GETPUT (	! GET, PUT, and CONNECT service
		IDENT = '7'
                %BLISS36(,ENTRY(
                                R$GET,
                                R$PUT,
                                R$CONNECT,
                                DAP$GET,
                                DAP$PUT
                                ))
		) =
BEGIN

!  COPYRIGHT (C) DIGITAL EQUIPMENT CORPORATION 1981, 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.

!++
! FACILITY:  DAP
!
! ABSTRACT:  Routines to transfer records or blocks of file data.
!
!
! ENVIRONMENT:  RMS, BLISSNET, XPORT, Transportable code.
!
! AUTHOR:	Andrew Nourse, CREATION DATE:  3-Jan-82
!
! 07    - Eat residue of message if data-overrun
! 06    - improve record size checking
! 05    - Adjust message size to account for byte size
! 04    - Put in ENTRY points
! 03    - Don't reinit descriptor after setting it up for ASCII
! 02    - Workaround RMS-20/FAL-20 habit of leaving CRLFs on records
! 01	- The beginning
!--
!
! INCLUDE FILES:
!

!LIBRARY 'BLI:XPORT';
 LIBRARY 'RMS';
 LIBRARY 'BLISSNET';
 LIBRARY 'CONDIT';
 LIBRARY 'DAP';

!
! TABLE OF CONTENTS:
!

FORWARD ROUTINE
	R$GET,
        R$PUT,
        R$CONNECT,
        DAP$GET,
        DAP$PUT,
        DAP$CONNECT;


!
! MACROS:
!

MACRO   BREAK_CHARACTERS= %O'12' TO %O'14', %O'20' TO %O'24', %O'32', %O'33' %;
                          ! <ESC><^Z><DC1-4><DLE><FF><VT> and <LF>

MACRO   ROTC(LOW_AC,BITS)=MACHOP(%O'245',LOW_AC,BITS) %;   
! Rotate-combined (LOW_AC is the lower of 2 contiguous accumulators)

!
! EQUATED SYMBOLS:
!

LITERAL $CHCRT=%O'15',                                ! Carriage return
        $CHLFD=%O'12';                                ! Linefeed

LITERAL LOAC=6,                            ! Ac's to user for
        HIAC=7;                            ! ROTC
!
! OWN STORAGE:
!

OWN T_CRLF: INITIAL (%ASCII %STRING(%CHAR(13),%CHAR(10))),
    D_CRLF: $STR_DESCRIPTOR(STRING=(2,CH$PTR(T_CRLF)));


!
! EXTERNAL REFERENCES:
!
EXTERNAL ROUTINE
                DAP$GET_BYTE,
                DAP$PUT_BYTE,
                DAP$GET_MESSAGE,
                DAP$PUT_MESSAGE,
                DAP$GET_STRING,
                DAP$GET_STATUS,
                DAP$PUT_STRING,
                DAP$PUT_CONTROL,
                DAP$GET_ACK,
                DAP$ERROR_DAP_RMS,
                DAP$EAT_MESSAGE,
                RL$GMACY11,
                RL$PMACY11,
                RL$CMACY11,
                DAP$HANDLE;             ! Condition handler
GLOBAL ROUTINE R$GET (RAB,ERR)  =	! Get a record

!++
! FUNCTIONAL DESCRIPTION:
!
!       Get a record from an open file.
!       Use RMS if file is local, DAP (via DAP$GET) if remote.
!
! FORMAL PARAMETERS:
!
!       RAB: A RAB as defined by RMS
!       ERR: Address of error routine
!
! IMPLICIT INPUTS:
!
!	NONE
!
! IMPLICIT OUTPUTS:
!
!	NONE
!
! ROUTINE VALUE:
! COMPLETION CODES:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN
    MAP RAB: REF $RAB_DECL;
    BIND FAB=.RAB[RAB$A_FAB]: $FAB_DECL;
    LOCAL V;

    V=(IF .FAB[FAB$V_REMOTE]
       THEN DAP$GET(RAB[$],.ERR)
       ELSE
           BEGIN
           BIND TYP=.FAB[FAB$A_TYP]: $TYP_DECL;
           LOCAL CLASS;

           IF TYP NEQ 0 THEN CLASS=.TYP[TYP$H_CLASS]
           ELSE CLASS=TYP$K_CLASS_ASCII;

           CASE .TYP[TYP$H_CLASS] FROM 0 TO TYP$K_CLASS_MAX OF
               SET
               [TYP$K_CLASS_ASCII,
                TYP$K_CLASS_IMAGE]: $GET(RAB=RAB[$],ERR=.ERR);
               [TYP$K_CLASS_MACY11]: RL$GMACY11(RAB[$],.ERR);
               [INRANGE, OUTRANGE]: SIGNAL(DAP$_AOR);
               TES
           END);

%(
    IF (.FAB[FAB$Z_RFM] EQL FAB$K_RFM_STM) AND (.RAB[RAB$H_RSZ] GEQ 2)
    THEN
        BEGIN
        LOCAL PT;                       ! Character pointer

        PT=CH$PTR(.RAB[RAB$A_RBF],.RAB[RAB$H_RSZ]-2);

        IF CH$RCHAR_A(PT) EQL $CHCRT
        THEN (IF CH$RCHAR_A(PT) EQL $CHLFD
              THEN RAB[RAB$H_RSZ]=.RAB[RAB$H_RSZ]-2);
        END
)%
    .V
    END;			!End of R$GET
GLOBAL ROUTINE R$PUT (RAB,ERR) =	! Put a record

!++
! FUNCTIONAL DESCRIPTION:
!
!       Put a record to an open file.
!       Use RMS if file is local, DAP (via DAP$PUT) if remote.
!
! FORMAL PARAMETERS:
!
!       RAB: A RAB as defined by RMS
!       ERR: Address of error routine
!
! COMPLETION CODES:
!
!	Standard RMS codes
!
! SIDE EFFECTS:
!
!	NONE
!--

    BEGIN
    MAP RAB: REF $RAB_DECL;
    BIND FAB=.RAB[RAB$A_FAB]: $FAB_DECL;
    IF .FAB[FAB$V_REMOTE]
    THEN DAP$PUT(RAB[$],.ERR)
    ELSE
        BEGIN
        IF (.FAB[FAB$Z_RFM] EQL FAB$K_RFM_STM)
        THEN
            BEGIN                       ! Make sure any stream record 
            LOCAL PTR;                  ! is terminated

            PTR=CH$PTR(.RAB[RAB$A_RBF],.RAB[RAB$H_RSZ]-1);
            SELECT CH$RCHAR_A(PTR) OF
                SET   !Break characters: <ESC><^Z><DC1-4><DLE><FF><VT> and <LF>
                [BREAK_CHARACTERS]: ;   ! Leave it alone
                [OTHERWISE]:
                    BEGIN
                    IF (.RAB[RAB$A_RBF] NEQ .RAB[RAB$A_UBF]) 
                    THEN                        ! He just pointed to the record
                        BEGIN                   ! so we will have to copy it
                        $STR_COPY(STRING=(.RAB[RAB$H_RSZ],
                                          CH$PTR(.RAB[RAB$A_RBF])),
                                  TARGET=(.RAB[RAB$H_RSZ],
                                          CH$PTR(.RAB[RAB$A_UBF])));
                        RAB[RAB$A_RBF]=.RAB[RAB$A_UBF];
                        PTR=CH$PTR(.RAB[RAB$A_RBF],.RAB[RAB$H_RSZ]);
                        END;

                    CH$WCHAR_A($CHCRT,PTR);             ! Add a CR
                    CH$WCHAR_A($CHLFD,PTR);             ! and a LF
                    RAB[RAB$H_RSZ]=.RAB[RAB$H_RSZ]+2;   ! and count them both
                    END;
                TES;
            END;

            BEGIN
            BIND TYP=.FAB[FAB$A_TYP]: $TYP_DECL;
            LOCAL CLASS;

            IF TYP NEQ 0 THEN CLASS=.TYP[TYP$H_CLASS]
            ELSE CLASS=TYP$K_CLASS_ASCII;

            CASE .CLASS FROM 0 TO TYP$K_CLASS_MAX OF
                SET
                [TYP$K_CLASS_ASCII,
                 TYP$K_CLASS_IMAGE]:  $PUT(RAB=RAB[$],ERR=.ERR);
                [TYP$K_CLASS_MACY11]: RL$PMACY11(RAB[$],.ERR);
                [INRANGE, OUTRANGE]: SIGNAL(DAP$_AOR);
               TES;
            END;
        END;
    .RAB[RAB$H_STS]                     ! Return status
    END;			!End of PUT
GLOBAL ROUTINE R$CONNECT (RAB,ERR) =	! Connect RAB to FAB

!++
! FUNCTIONAL DESCRIPTION:
!
!       Connect FAB to RAB
!       Use RMS if file is local, DAP (via DAP$CONNECT) if remote.
!
! FORMAL PARAMETERS:
!
!       RAB: A RAB as defined by RMS
!       ERR: Address of error routine
!
! IMPLICIT INPUTS:
!
!	NONE
!
! IMPLICIT OUTPUTS:
!
!	RAB[RAB$Z_RAC] set to SEQ if (BFT or TRA) and local
!
! ROUTINE VALUE:
! COMPLETION CODES:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN
    MAP RAB: REF $RAB_DECL;
    BIND FAB=.RAB[RAB$A_FAB]: $FAB_DECL;        ! FAB for this RAB
    BIND TYP=.FAB[FAB$A_TYP]: $TYP_DECL;        ! Data type block

    LOCAL STATUS;
    LOCAL RAC;

    IF ((RAC=.RAB[RAB$Z_RAC]) EQL RAB$K_RAC_BFT)
    THEN RAB[RAB$Z_RAC]=RAB$K_RAC_TRA;  ! RMS & most FALs
                                        ! won't accept BFT or TRA on $CONNECT

    IF .FAB[FAB$V_REMOTE]
    THEN STATUS=DAP$CONNECT(RAB[$],.ERR)
    ELSE
        BEGIN
        IF .RAB[RAB$Z_RAC] EQL RAB$K_RAC_TRA
        THEN RAB[RAB$Z_RAC]=RAB$K_RAC_SEQ;    ! RMS won't like TRA either
        IF .RAC EQL RAB$K_RAC_TRA
        THEN RAC=RAB$K_RAC_SEQ;         ! Change permanently if TRA

        IF (TYP NEQ 0)
        AND (.TYP[TYP$H_CLASS] EQL TYP$K_CLASS_MACY11)
        THEN STATUS=RL$CMACY11(RAB[$],.ERR)     ! MACY11 has some special setup
        ELSE STATUS=$CONNECT(RAB=RAB[$],ERR=.ERR);
        END;

    RAB[RAB$Z_RAC]=.RAC;          ! Restore RAC field after hiding from RMS/FAL
    RAB[RAB$A_RBF]=.RAB[RAB$A_UBF]; ! Init pointer to user buffer
    .STATUS
    END;			!End of CONNECT
GLOBAL ROUTINE DAP$GET (RAB,ERR)  =	! Get a record (remote)

!++
! FUNCTIONAL DESCRIPTION:
!
!       Get a record from an open file on another system
!
! FORMAL PARAMETERS:
!
!       RAB: A RAB as defined by RMS
!       ERR: Address of error routine
!
! COMPLETION CODES:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN
    MAP RAB: REF $RAB_DECL;
    BIND FAB=.RAB[RAB$A_FAB]: $FAB_DECL;
    BIND DIB=.FAB[FAB$A_DIB]: $DIB;
    BIND IDD=.DIB[DIB$A_I_DD]: $DAP_DESCRIPTOR,
         ODD=.DIB[DIB$A_O_DD]: $DAP_DESCRIPTOR;
    BIND TYP=.FAB[FAB$A_TYP]: $TYP_DECL;
    BIND ROUTINE $$ERRRTN=.ERR: RMS_ERCAL;

    LOCAL CLASS;
    LOCAL ADATA: $STR_DESCRIPTOR(),
          BDATA: $XPO_DESCRIPTOR();
    LOCAL DISPLAY: BITVECTOR[28];
    LOCAL RABSAV: VOLATILE;
    LOCAL ERRSAV: VOLATILE;

    ENABLE DAP$HANDLE(RABSAV,ERRSAV);
    ERRSAV=.ERR;
    RABSAV=.RAB;                        ! Handler will need this

    CLEARV(DISPLAY);

    IF TYP NEQ 0 THEN CLASS=.TYP[TYP$H_CLASS]
                 ELSE CLASS=TYP$K_CLASS_ASCII;

    DO  BEGIN
        IF .DIB[DIB$V_NO_SEND_CONTROL] EQL 0   ! Send control on first GET only
        THEN                                   ! if file transfer mode, 
            BEGIN                              ! otherwise, on every GET
            DAP$PUT_CONTROL(ODD[$],RAB[$],DAP$K_GET,DISPLAY);        
            DAP$PUT_MESSAGE(ODD[$]);
            DIB[DIB$V_NO_SEND_CONTROL]=1;          !? File transfer mode only
            END;

        SELECT GET_HEADER(IDD[$]) OF
        SET
        [DAP$K_DATA]:   BEGIN                  ! Process data from remote
                        RAB[RAB$G_RFA]=GET_VBN(IDD[$]);

                        RAB[RAB$A_RBF]=.RAB[RAB$A_UBF]; ! Use user's buffer


                        CASE .CLASS FROM 0 TO TYP$K_CLASS_MAX OF
                        SET
                        [TYP$K_CLASS_ASCII]:
                            BEGIN       ! 7bit Ascii File
                            IF .IDD[DAP$H_LENGTH] GTR (.RAB[RAB$H_USZ]*5)
                            THEN        ![6] record too big
                                BEGIN
                                DAP$EAT_MESSAGE(IDD[$]);        ![7]
                                RAB[RAB$H_STS]=RMS$_RTB;
                                $$ERROR(GET,RAB[$]);
                                RETURN RMS$_RTB;
                                END;

                            RAB[RAB$H_RSZ]=.IDD[DAP$H_LENGTH]; ! Record length
                            $STR_DESC_INIT(DESCRIPTOR=ADATA,
                                           STRING=(.RAB[RAB$H_USZ]*5,
                                                   CH$PTR(.RAB[RAB$A_UBF])));
                            DAP$GET_STRING(IDD[$],ADATA);      
                            END;
                        [TYP$K_CLASS_IMAGE]:
                            BEGIN              ! Binary file
                            REGISTER A=LOAC;
                            REGISTER B=HIAC;
                            LOCAL PTR: REF VECTOR;       ! Pointer to buffer

                            PTR=.RAB[RAB$A_UBF];
                            RAB[RAB$H_RSZ]=((.IDD[DAP$H_LENGTH]+4)/9)*2;
                            !9 bytes for every 2 words packed:
                            !========================================!
                            !..5!   4    !   3    !   2    !    1    !
                            !========================================!
                            !   9    !   8    !   7    !   6    ! 5...
                            !========================================!
                            DECR I FROM (.IDD[DAP$H_LENGTH]/9)-1 TO 0
                            DO  BEGIN
                                A=B=0;

                                DECR J FROM 8 TO 0
                                DO  BEGIN
                                    A=.A+DAP$GET_BYTE(IDD[$]); ! Get a byte
                                    ROTC(A,-8);                ! Rotate
                                    END;
                                PTR[0]=.A;        ! Write to user's buffer
                                PTR[1]=.B;        ! two words
                                PTR=.PTR+2;       ! Increment the pointer
                                END;

                            A=B=0;

                            ! If the DAP buffer is not even multiple of 9 bytes
                            ! do the last few, and rotate the doubleword
                            ! back to its original orientation

                            IF .IDD[DAP$H_LENGTH] GTR 0
                            THEN
                                BEGIN
                                LOCAL ROTATES;    ! To make 72 bits of rotation
                                                  ! when all the data is read

                                ROTATES=(.IDD[DAP$H_LENGTH]-9)*8;

                                DECR I FROM .IDD[DAP$H_LENGTH]-1 TO 0
                                DO  BEGIN
                                    A=.A+DAP$GET_BYTE(IDD[$]); ! Get a byte
                                    ROTC(A,-8);                ! Rotate
                                    END;

                                ROTC(A,.ROTATES); ! Rotate the bytes
                                                  ! the rest of the way
                                PTR[0]=.A;        ! Write to user's buffer
                                PTR[1]=.B;        ! two words
                                END;
                            END;
                        [TYP$K_CLASS_MACY11]:
                            BEGIN       ! Just copy into buffer
                            LOCAL PTR;
                            IF .IDD[DAP$H_LENGTH] GTR (.RAB[RAB$H_USZ]*4)
                            THEN        ![6] record too big
                                BEGIN
                                DAP$EAT_MESSAGE(IDD[$]);        ![7]
                                RAB[RAB$H_STS]=RMS$_RTB;
                                $$ERROR(GET,RAB[$]);
                                RETURN RMS$_RTB;
                                END;

                            RAB[RAB$H_RSZ]=.IDD[DAP$H_LENGTH]; ! Msg length
                            PTR=CH$PTR(.RAB[RAB$A_UBF],0,8);

                            DECR I FROM .RAB[RAB$H_RSZ] TO 0
                            DO CH$WCHAR_A(DAP$GET_BYTE(IDD[$]),PTR);
                            END;
                        [INRANGE,OUTRANGE]: SIGNAL(DAP$_AOR);
                        TES;

                        RETURN RAB[RAB$H_STS]=RMS$_SUC;    ! WIN
                        END;

        [DAP$K_STATUS]: BEGIN
                        LOCAL E;
                        E=DAP$GET_STATUS(IDD[$]);  ! End of file or error
                        RAB[RAB$H_STS]=DAP$ERROR_DAP_RMS(.E);
                        RAB[RAB$H_STV]=.E<DAPCODE>;
                        $$ERROR(GET, RAB[$]);
                        IF .RAB[RAB$H_STS] NEQ RMS$_SUC ! Continue if handler
                        THEN RETURN .RAB[RAB$H_STS];    ! fixed it, else return
                        END;                            ! error code

        [OTHERWISE]:    BEGIN
                        RAB[RAB$H_STS]=RMS$_DPE;
                        RAB[RAB$H_STV]=(DAP$K_MAC_SYNC^12)+
                                       .IDD[DAP$B_OPERATOR];
                        $$ERROR(GET,RAB[$]);
                        IF .RAB[RAB$H_STS] NEQ RMS$_SUC
                        THEN RETURN .RAB[RAB$H_STS];
                        END;
                                               ! Somebody screwed up
        TES
        END WHILE 1;

    STS$K_NORMAL                               ! Success
    END;			!End of DAP$GET
GLOBAL ROUTINE DAP$PUT (RAB,ERR)  =	! Put a record (remote)

!++
! FUNCTIONAL DESCRIPTION:
!
!       Put a record to an open file on another system.
!
! FORMAL PARAMETERS:
!
!       RAB: A RAB as defined by RMS
!       ERR: Address of error routine
!
! IMPLICIT INPUTS:
!
!	NONE
!
! IMPLICIT OUTPUTS:
!
!	NONE
!
! ROUTINE VALUE:
! COMPLETION CODES:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE

!--

    BEGIN
    MAP RAB: REF $RAB_DECL;                    ! RMS RAB
    BIND FAB=.RAB[RAB$A_FAB]: $FAB_DECL;       ! RMS FAB pointed to by above
    BIND DIB=.FAB[FAB$A_DIB]: $DIB;            ! Data Interchange info
    BIND TYP=.FAB[FAB$A_TYP]: $TYP_DECL;        ! Data type
    BIND ODD=.DIB[DIB$A_O_DD]: $DAP_DESCRIPTOR; ! our message descriptor
    BIND CONFIG=.DIB[DIB$A_CONFIG]: $CONFIG;   ! Configuration message data
    BIND ROUTINE $$ERRRTN=.ERR: RMS_ERCAL;

    LOCAL CLASS;
    LOCAL BDATA: $XPO_DESCRIPTOR();            ! this will point to binary data
    LOCAL S;
    LOCAL ADATA: $STR_DESCRIPTOR();            ! this will point to ascii data
    LOCAL DISPLAY: BITVECTOR[28] INITIAL(0);
    LOCAL UNTERMINATED_RECORD: INITIAL(0);     ! Ascii record has no terminator

    LOCAL RABSAV:VOLATILE;
    LOCAL ERRSAV: VOLATILE;

    ENABLE DAP$HANDLE(RABSAV,ERRSAV);
    ERRSAV=.ERR;
    RABSAV=.RAB;                        ! Handler will need this

    IF TYP NEQ 0 THEN CLASS=.TYP[TYP$H_CLASS]
                 ELSE CLASS=TYP$K_CLASS_ASCII;

    IF .DIB[DIB$V_NO_SEND_CONTROL] EQL 0       ! Send control on first PUT only
    THEN                                       ! if file transfer mode, 
        BEGIN                                  ! otherwise, on every PUT
        DAP$PUT_CONTROL(ODD[$],RAB[$],DAP$K_PUT,DISPLAY);        
        DIB[DIB$V_NO_SEND_CONTROL]=1;          !? File transfer mode only
        END;

    INIT_MESSAGE(ODD[$]);                       ! Initialize descriptor

    ODD[DAP$B_OPERATOR]=DAP$K_DATA;             ! Set up a DATA message
    ODD[DAP$V_MFLAGS_LENGTH]=1;                 ! Always send length field

    IF .RAB[RAB$Z_RAC] EQL RAB$K_RAC_BFT        
    THEN                                        ! Block mode 
        BEGIN
        ODD[DAP$H_LENGTH]=((.RAB[RAB$H_RSZ]/2)*9)    ! 9 bytes each 2 words
                          +(%BPVAL/8)+1;             ! + RECNUM field
        ODD[DAP$V_MFLAGS_BITCNT]=1;                  ! We will send bit count

        IF .RAB[RAB$H_RSZ] ! is odd number of words
        THEN
            BEGIN
            ODD[DAP$H_BITCNT]=4;            ! Last byte is only half a byte
            ODD[DAP$H_LENGTH]=.ODD[DAP$H_LENGTH]+5; ! 5  bytes for last word
            END
        ELSE ODD[DAP$H_BITCNT]=0;
        END                             ! End block mode
    ELSE
        BEGIN                           ! Record mode
        LOCAL TPTR,
              SECOND_LAST,              ! 2nd-last char
              LAST;                     ! last char

        TPTR=CH$PTR(.RAB[RAB$A_RBF],0,.FAB[FAB$Z_BSZ]);
        $STR_DESC_INIT(DESCRIPTOR=ADATA, STRING=(.RAB[RAB$H_RSZ],.TPTR));
             
        TPTR=CH$PLUS(.TPTR,.RAB[RAB$H_RSZ]-2);
        SECOND_LAST=CH$RCHAR_A(TPTR);
        LAST=CH$RCHAR_A(TPTR);

        SELECT .LAST OF
        SET
        [BREAK_CHARACTERS]: UNTERMINATED_RECORD=0;  ! Terminator on record
        [$CHLFD]:
            IF .SECOND_LAST EQL $CHCRT
            THEN UNTERMINATED_RECORD=2;             ! Default terminator
        [OTHERWISE]: UNTERMINATED_RECORD=1;         ! No terminator
        TES;

        ! If Implied CRLF, and CRLF is the terminator, then strip it off
        IF .FAB[FAB$V_RAT_CR] AND (.UNTERMINATED_RECORD EQL 2)
        THEN ADATA[STR$H_LENGTH]=.ADATA[STR$H_LENGTH]-2;

        ! For image files we must determine how many 8-bit bytes are required
        ! to send a record of (RSZ) (BSZ)-bit bytes, at 9 bytes per 2 words.
        ! 

        IF .CLASS EQL TYP$K_CLASS_IMAGE
        THEN
            BEGIN
            LOCAL RSIZW;                ! Record size in words
            RSIZW=.ADATA[STR$H_LENGTH]/(%BPVAL/.FAB[FAB$Z_BSZ]);
            ODD[DAP$H_LENGTH]=1+        ! Null recnum
                                ((.RSIZW/2)*9)+ ! 9 bytes per 2 words
                                ((.RSIZW AND 1)*5); ! 5 bytes for last word
            END
        ELSE ODD[DAP$H_LENGTH]=.ADATA[STR$H_LENGTH]+1;  ! Length of record
                                                       ! + null RECNUM field

        ! ASCII STREAM wants CRLFs in record, adjust count if necessary
        IF (.FAB[FAB$Z_RFM] EQL FAB$K_RFM_STM) AND .UNTERMINATED_RECORD
        THEN ODD[DAP$H_LENGTH]=.ODD[DAP$H_LENGTH]+2;
        END;                            ! End record mode


    IF .ODD[DAP$H_LENGTH] GTR .ODD[DAP$H_MESSAGE_LENGTH]
    THEN                                ![6] Record is too big
        BEGIN
        RAB[RAB$H_STS]=RMS$_RTB;
        $$ERROR(PUT,RAB[$]);     
        RETURN RMS$_RTB
        END;

    PUT_HEADER(ODD[$]);                         ! Build the message header

    IF (.RAB[RAB$Z_RAC] EQL RAB$K_RAC_BFT)      ! If block mode
    THEN PUT_VBN(ODD[$],.RAB[RAB$G_BKT])        ! Build record number
    ELSE PUT_BYTE(ODD[$],0);                    ! 0 length if not used
    ! Note that DAP Bucket numbers start at 1, RMS-36 starts at 0

    !Now! At Last!!! The Data!!!!!
    CASE .CLASS FROM 0 TO TYP$K_CLASS_MAX OF
    SET
    [TYP$K_CLASS_ASCII]:
        BEGIN
        DAP$PUT_STRING(ODD[$],ADATA);          ! Put the data in

        ! ASCII STREAM wants records terminated
        IF .UNTERMINATED_RECORD AND (.FAB[FAB$Z_RFM] EQL FAB$K_RFM_STM)
        THEN DAP$PUT_STRING(ODD[$],D_CRLF);    ! Put back the CRLF

        END;
    [TYP$K_CLASS_IMAGE]:
        BEGIN                                  ! Binary Data
        LOCAL PTR: REF VECTOR;                 ! Pointer to buffer

        PTR=.RAB[RAB$A_RBF];

        !9 bytes for every 2 words (round up), packed:
        !========================================!
        !..5!   4    !   3    !   2    !    1    !
        !========================================!
        !   9    !   8    !   7    !   6    ! 5...
        !========================================!

        DECR I FROM (.RAB[RAB$H_RSZ]/2)-1 TO 0
        DO  BEGIN
            REGISTER A=LOAC;
            REGISTER B=HIAC;

            A=.PTR[0];                     ! Get a word of data
            B=.PTR[1];                     ! and another word
            PTR=.PTR+2;                    ! Increment the pointer

            DECR J FROM 8 TO 0
            DO  BEGIN
                ! B is passed to Put-byte to convince the BLISS compiler
                ! not to trash the register.  BLISS does not know what
                ! ROTC does, so it 'optimizes' and steps on register B
                DAP$PUT_BYTE(.B,ODD[$],.A);! Put out a byte
                ROTC(A,-8);                ! Rotate to next one
                END;
            END;

        IF .RAB[RAB$H_RSZ]                  ! If the record length is odd
        THEN
            BEGIN
            REGISTER A=LOAC;

            A=.PTR[0];                      ! Get the last word

            DECR I FROM 4 TO 0
            DO  BEGIN
                PUT_BYTE(ODD[$],.A);        ! Put out a byte
                A=.A^-8;                    ! Shift to next one
                END;
            END;
        END;
    [TYP$K_CLASS_MACY11]:
        BEGIN
        ! Conversion has already been done, just send this
        LOCAL PTR;
        PTR=CH$PTR(.RAB[RAB$A_RBF],0,8);

        DECR I FROM .RAB[RAB$H_RSZ]-1 TO 0
        DO DAP$PUT_BYTE(ODD[$],CH$RCHAR_A(PTR));
        END;
    [INRANGE,OUTRANGE]: SIGNAL(DAP$_AOR);
    TES;
 
    IF NOT .FAB[FAB$V_FOP_DFW]          ! If write is not deferred
    THEN DAP$PUT_MESSAGE(ODD[$]);               ! Send out the message

    RAB[RAB$H_STS]=RMS$_SUC                    ! WIN
    END;			!End of DAP$PUT
ROUTINE DAP$CONNECT (RAB,ERR)  =	! Connect RAB to FAB

!++
! FUNCTIONAL DESCRIPTION:
!
!       Connect RAB to FAB for an open file on another system.
!
! FORMAL PARAMETERS:
!
!       RAB: A RAB as defined by RMS
!       ERR: Address of error routine
!
! IMPLICIT INPUTS:
!
!	NONE
!
! IMPLICIT OUTPUTS:
!
!	NONE
!
! ROUTINE VALUE:
! COMPLETION CODES:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE

!--

    BEGIN
    MAP RAB: REF $RAB_DECL;                    ! RMS RAB
    BIND FAB=.RAB[RAB$A_FAB]: $FAB_DECL;       ! RMS FAB pointed to by above
    BIND DIB=.FAB[FAB$A_DIB]: $DIB;            ! Data Interchange info
    BIND ODD=.DIB[DIB$A_O_DD]: $DAP_DESCRIPTOR;! our output message descriptor
    BIND IDD=.DIB[DIB$A_I_DD]: $DAP_DESCRIPTOR;! our input message descriptor
    BIND ROUTINE $$ERRRTN=.ERR: RMS_ERCAL;
    local s; !?temp
    LOCAL BDATA: $XPO_DESCRIPTOR();            ! this will point to binary data
    LOCAL ADATA: $STR_DESCRIPTOR();            ! this will point to ascii data
    LOCAL DISPLAY: BITVECTOR[28];

    LOCAL RABSAV: VOLATILE;
    LOCAL ERRSAV: VOLATILE;

    ENABLE DAP$HANDLE(RABSAV,ERRSAV);
    ERRSAV=.ERR;
    RABSAV=.RAB;                        ! Handler will need this

    CLEARV(DISPLAY);

    DAP$PUT_CONTROL(ODD[$],RAB[$],DAP$K_CONNECT,DISPLAY);        
    DAP$PUT_MESSAGE(ODD[$]);
    
    DIB[DIB$V_NO_SEND_CONTROL]=0;       ! Send control on first Get or Put

    IF (S=DAP$GET_ACK(IDD[$]))
    THEN
        BEGIN
        RAB[RAB$H_STS]=RMS$_SUC;               ! WIN
        STS$K_NORMAL                           ! Win
        END
    ELSE
        BEGIN
        RAB[RAB$H_STS]=DAP$ERROR_DAP_RMS(.S);
        RAB[RAB$H_STV]=.S<DAPCODE>;        ! Extract DAP code from status
        $$ERROR(CONNECT,RAB[$])
        END
    END;			!End of DAP$CONNECT
END				!End of module
ELUDOM