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Trailing-Edge - PDP-10 Archives - bb-r775d-bm_tops20_ks_upd_4 - sources/xpnput.b36
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%TITLE 'XPNPUT - Put data to a network link'
MODULE xpnput (
               ENTRY ( XPN$PUT )
              ) =
BEGIN
!  COPYRIGHT (C) DIGITAL EQUIPMENT CORPORATION 1981, 1985.
!  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:
!   Transportable BLISS interface to DECNET-20.
!
! ABSTRACT:
!   This module implements the XPN$PUT routine, called by the $XPN_PUT
!   macro.
!
! ENVIRONMENT:
!   TOPS20 user mode.
!
! AUTHOR:  Larry Campbell, CREATION DATE:  January 8, 1982
!
! MODIFIED BY:
!
!--
! TABLE OF CONTENTS:
!
FORWARD ROUTINE
    xpn$put,
    xpn$$put;
!
! INCLUDE FILES:
!
LIBRARY 'BLI:XPORT';                    ! XPORT definitions
LIBRARY 'BLISSNET';                     ! Transportable definitions
LIBRARY 'BLI:MONSYM';                   ! TOPS-20 definitions
LIBRARY 'BLISSNET20';                   ! BLISSnet-20 definitions
REQUIRE 'JSYSDEF';                      ! JSYS linkage definitions
!
! MACROS:
!

!
! EQUATED SYMBOLS:
!
LITERAL
    XPN$_TOOMUCHDATA = XPN$_BUG;        ! *** Temporary until BLISSNET.REQ
                                        !     gets definition
!
! OWN STORAGE:
!

!
! EXTERNAL REFERENCES:
!
EXTERNAL ROUTINE
    xpn$$valid_nlb,
    xpn$$link_status,
    xpn$$jsys_error;
GLOBAL ROUTINE xpn$put (nlb, success_routine, failure_routine) =
!++
! FUNCTIONAL DESCRIPTION:
!   Top level code to support $XPN_PUT macro.  This routine validates the
!   NLB, calls xpn$$put to do the actual work, and deals with optional
!   user-supplied success/failure routines.
!
! FORMAL PARAMETERS:
!   nlb         - address of the Network Link Block
!
! IMPLICIT INPUTS:
!   NONE
!
! IMPLICIT OUTPUTS:
!
! ROUTINE VALUE and
! COMPLETION CODES:
!   Code returned by xpn$$put.
!
! SIDE EFFECTS:
!   NONE
!
!--
    BEGIN

    MAP
        nlb : REF $XPN_NLB();

    LOCAL
        original_primary_code,
        primary_code,
        secondary_code,
        retcode;

    nlb_binds;                          ! create nice names for NLB fields
    !
    ! validate the NLB
    !
    retcode = xpn$$valid_nlb (.nlb);
    IF NOT .retcode THEN
        BEGIN
        original_primary_code = XPN$_BAD_NLB;
        secondary_code = .retcode
        END
    ELSE
        BEGIN
	original_primary_code = xpn$$put (.nlb);
        nlb[NLB$G_COMP_CODE] = .original_primary_code;
        secondary_code = .nlb[NLB$G_2ND_CODE]
        END;
    !
    ! Check completion code and call success or failure routine as required
    !
    IF .original_primary_code THEN
        IF .success_routine NEQ 0 THEN
            primary_code =
                (.success_routine) (XPN$K_PUT, .original_primary_code,
                    .secondary_code, .nlb)
        ELSE
            primary_code = .original_primary_code
    ELSE
        IF .failure_routine NEQ 0 THEN
            primary_code =
                (.failure_routine) (XPN$K_PUT, .original_primary_code,
                    .secondary_code, .nlb)
        ELSE
            primary_code = .original_primary_code;
    !
    ! Unless the NLB was bad, store the completion code there
    !
    IF .original_primary_code NEQ XPN$_BAD_NLB
    THEN
        nlb[NLB$G_COMP_CODE] = .primary_code;
    RETURN (.primary_code);

    END;                                !End of xpn$put
ROUTINE xpn$$put (nlb) =
!++
! FUNCTIONAL DESCRIPTION:
!   Does the actual work to support the $XPN_PUT macro.
!
! FORMAL PARAMETERS:
!   nlb         - address of the Network Link Block
!
! IMPLICIT INPUTS:
!	NONE
!
! IMPLICIT OUTPUTS:
!	NONE
!
! ROUTINE VALUE and
! COMPLETION CODES:
!   XPN$_ABORT          - link has been aborted
!   XPN$_DISCONNECTED   - link has been disconnected
!   XPN$_NOT_OPEN       - NLB not open
!   XPN$_TOOMUCHDATA    - more than 16 bytes supplied for an interrupt message
!   XPN$_ILLOGIC        - user logic error
!      XPN$_ACTIVE          - TYPE=ACCEPT for active link is meaningless
!      XPN$_NO_EVENT        - no connect request pending for TYPE=ACCEPT
!
! SIDE EFFECTS:
!   NONE
!
!--
    BEGIN

    MAP
        nlb : REF $XPN_NLB();

    LOCAL
        link_status,
        output_descriptor : REF $STR_DESCRIPTOR();

    nlb_binds;
    IF .nlb[NLB$V_OPEN] EQL 0
    THEN
        RETURN (XPN$_NOT_OPEN);
    output_descriptor = .nlb[NLB$A_OUTPUT];
    CASE .nlb[NLB$B_SUBFUNC] FROM NLB$K_DATA TO NLB$K_REJECT OF
        SET
        [NLB$K_DATA] :
            BEGIN
            LOCAL
                byte_count;
            IF (byte_count = .output_descriptor[STR$H_LENGTH]) EQL 0
            THEN
                RETURN (XPN$_NORMAL);
            IF .nlb[NLB$V_END_MSG]      ! Select SOUTR or SOUT
            THEN
                BEGIN
                IF NOT JSYS_SOUTR (.nlb[NLB$H_JFN],
                                   .output_descriptor[STR$A_POINTER],
                                   -.byte_count,
                                   0)
                THEN
                    RETURN (xpn$$jsys_error (.nlb, SOUTR_))
                END
            ELSE
                BEGIN
                IF NOT JSYS_SOUT (.nlb[NLB$H_JFN],
                                  .output_descriptor[STR$A_POINTER],
                                  -.byte_count,
                                  0)
                THEN
                    RETURN (xpn$$jsys_error (.nlb, SOUT_))
                END;
            RETURN (XPN$_NORMAL)
            END;
        [NLB$K_INTERRUPT] :
            BEGIN
            LOCAL
                byte_count;
            IF (byte_count = MIN (.output_descriptor[STR$H_LENGTH], 16)) EQL 0
            THEN
                RETURN (XPN$_NORMAL);
            IF NOT JSYS_MTOPR (.nlb[NLB$H_JFN],
                               $MOSIM,
                               .output_descriptor[STR$A_POINTER],
                               .byte_count)
            THEN
                RETURN (xpn$$jsys_error (.nlb, MTOPR_));
            IF .output_descriptor[STR$H_LENGTH] GTR 16
            THEN
                RETURN (XPN$_TOOMUCHDATA)
            ELSE
                RETURN (XPN$_NORMAL)
            END;
        [NLB$K_LINK_SERV] : RETURN (XPN$_NORMAL);
        [NLB$K_ACCEPT] :
            BEGIN
            IF active
            THEN
                BEGIN
                nlb[NLB$G_2ND_CODE] = XPN$_ACTIVE;
                RETURN (XPN$_ILLOGIC)
                END;
            !
            ! Check to make sure link is waiting for connect confirm
            !
            IF (xpn$$link_status (.nlb) AND MO_WCC) EQL 0
            THEN
                BEGIN
                nlb[NLB$G_2ND_CODE] = XPN$_NO_EVENT;
                RETURN (XPN$_ILLOGIC)
                END;
            IF NOT JSYS_MTOPR (.nlb[NLB$H_JFN],
                               $MOCC,
                               .output_descriptor[STR$A_POINTER],
                               MIN (.output_descriptor[STR$H_LENGTH], 16))
            THEN
                RETURN (xpn$$jsys_error (.nlb, MTOPR_));
            nlb[NLB$V_CONNECTED] = 1;
            nlb[NLB$V_CONN_REQ] = 0;
            IF .output_descriptor[STR$H_LENGTH] GTR 16
            THEN
                RETURN (XPN$_TOOMUCHDATA)
            ELSE
                RETURN (XPN$_NORMAL)
            END;
        [INRANGE, OUTRANGE] : xpn$$bug ('Invalid NLB$B_SUBFUNC value');
        TES;
    RETURN (XPN$_BUG)                   ! Should never fall through here
    END;                                !End of xpn$$put
END                                     !End of module XPNPUT
ELUDOM