Routine: HLCSDR1

HLCSDR1 ;ALB/RJS - HYBRID LOWER LAYER PROTOCOL 2.2 - 9/13/94 ;08/22/2001  10:16

 ;;1.6;HEALTH LEVEL SEVEN;**2,22,27,30,34,62**;Oct 13, 1995

 ;This is an implemetation of the HL7 Hybrid Low Layer Protocol

START(HLDP,HLRETPRM,HLDREAD,HLDWRITE,HLDSTRT,HLDEND,HLDVER,HLDBSIZE) ;

 N HLIND0,HLIND1,HLTRANS,HLCHK,HLACKBLK,HLDOUT0,HLDOUT1,X,HLRETRY

 N HLNXST,HLLINE,HLNAK,HLTVV,HLWFLG,HLC1,HLC2

 ;S X=10 X ^%ZOSF("PRIORITY")

 ; above line commented-out patch 27, sys mgr will set as needed

 S HLWFLG=1

1 ; Look to see if there is anything to read in

 I $D(HLTRACE) S HLNXST=1 D TRACE^HLCSDR2

 D:$P(^HLCS(870,HLDP,0),U,5)'="IDLE" MONITOR^HLCSDR2("IDLE",5,HLDP)

 S X=$$READ^HLCSUTL(HLDREAD,HLDBSIZE,.HLTRANS) D TRANS^HLCSDR2(X,.HLTRANS),INITIZE^HLCSDR2

 I HLTRANS="VT" G TVV

 I HLTRANS'="TIMEOUT" G 1

 I 'HLWFLG D PUSH^HLCSQUE(HLDOUT0,HLDOUT1),MONITOR^HLCSDR2("P",2,HLDOUT0,HLDOUT1,"OUT"),MONITOR^HLCSDR2("TIMEOUT",5,HLDP)

 G 14

TVV ;Read in tvv

 I $D(HLTRACE) S HLNXST="TVV" D TRACE^HLCSDR2

 D MONITOR^HLCSDR2("READING",5,HLDP)

 S X=$$READ^HLCSUTL(HLDREAD,HLDBSIZE,.HLTRANS) D TRANS^HLCSDR2(X,.HLTRANS)

 I $L(X)'=3!(HLTRANS'="CR") G 1

 S HLNAK=$E(X),HLTVV=X,X=$C(HLDSTRT)_X_$C(13) D CHKSUM^HLCSDR2

 I HLNAK="D" D  G:HLIND0'<0 2 D MONITOR^HLCSDR2(100,19,HLDP) G EXIT

 . S HLIND0=$$ENQUEUE^HLCSQUE(HLDP,"IN"),HLIND1=$P(HLIND0,U,2),HLIND0=+HLIND0

 . D MONITOR^HLCSDR2(HLTVV,4,HLDP,HLIND1,"IN")

 I HLNAK="N" S X=HLTVV K ^TMP("HLCSDR1",$J,HLDP) D SETNODE2^HLCSDR2 G 9

 S HLTRANS="G" D MONITOR^HLCSDR2(105,19,HLDP) G 5

2 ; Read in message

 I $D(HLTRACE) S HLNXST=2 D TRACE^HLCSDR2

 D MONITOR^HLCSDR2("READING",5,HLDP)

 S X=$$READ^HLCSUTL(HLDREAD,HLDBSIZE,.HLTRANS) D TRANS^HLCSDR2(X,.HLTRANS)

 I HLTRANS="CR" D SETNODE^HLCSDR2(HLIND0,HLIND1,HLTRANS) S X=X_$C(13) D CHKSUM^HLCSDR2 G 2

 I HLTRANS="LONGLINE" D SETNODE^HLCSDR2(HLIND0,HLIND1,HLTRANS),CHKSUM^HLCSDR2 G 2

 I HLTRANS="TIMEOUT" S HLTRANS="G" D MONITOR^HLCSDR2(106,19,HLDP) G 5

 I HLTRANS="FS" G 3

G 2

3 ; Check for Validity of data

 I $D(HLTRACE) S HLNXST=3 D TRACE^HLCSDR2

 D MONITOR^HLCSDR2("VALIDATE",5,HLDP)

 S HLCHK=$E(X,$L(X)-7,$L(X)),X=$E(X,1,$L(X)-8)

 S HLTRANS=$$VALID1^HLCSDR2("INCOMING MESSAGE",HLCHK,HLIND0,HLIND1)

 I HLTRANS="VALID" G 4

 D MONITOR^HLCSDR2(107,19,HLDP) G 5

4 ; Valid message.

 I $D(HLTRACE) S HLNXST=4 D TRACE^HLCSDR2

 D MONITOR^HLCSDR2("DONE",5,HLDP),MONITOR^HLCSDR2("A",3,HLDP,HLIND1,"IN"),MONITOR^HLCSDR2("P",2,HLDP,HLIND1,"IN")

 D INITIZE^HLCSDR2 G 6

5 ; Send NAK When This State is Reached

 I $D(HLTRACE) S HLNXST=5 D TRACE^HLCSDR2

 D MONITOR^HLCSDR2("NAK",5,HLDP),MONITOR^HLCSDR2(HLTRANS,3,HLDP,HLIND1,"IN"),MONITOR^HLCSDR2("P",2,HLDP,HLIND1,"IN")

 D NAK^HLCSDR2(HLTRANS)

 D INITIZE^HLCSDR2 G 1

6 ;Check "OUT" queue

 I $D(HLTRACE) S HLNXST=6 D TRACE^HLCSDR2

 S HLDOUT0=$$DEQUEUE^HLCSQUE(HLDP,"OUT")

 I +HLDOUT0<0 G 1

 S HLDOUT1=$P(HLDOUT0,U,2),HLDOUT0=+HLDOUT0,HLRETRY=-1 G 7

7 ; Send Data to other Application

 I HLRETRY=HLRETPRM D MONITOR^HLCSDR2(103,19,HLDP),MONITOR^HLCSDR2("G",3,HLDP,HLDOUT1,"OUT"),MONITOR^HLCSDR2("D",2,HLDP,HLDOUT1,"OUT") G 14

 I $D(HLTRACE) S HLNXST=7 D TRACE^HLCSDR2

 D MONITOR^HLCSDR2("WRITING",5,HLDP)

 D WRITE^HLCSDR2(HLDOUT0,HLDOUT1)

 ; set message status to 'done'

 D MONITOR^HLCSDR2("D",2,HLDP,HLDOUT1,"OUT") G 1

9 ; Read in Neg Acknowledgement message

 I $D(HLTRACE) S HLNXST=9 D TRACE^HLCSDR2

 S X=$$READ^HLCSUTL(HLDWRITE,HLDBSIZE,.HLTRANS) D TRANS^HLCSDR2(X,.HLTRANS),MONITOR^HLCSDR2("READ ACK",5,HLDP)

 I HLTRANS="CR" D SETNODE2^HLCSDR2 S X=X_$C(13) D CHKSUM^HLCSDR2 G 9

 I HLTRANS="FS" G 10

 I HLTRANS="LONGLINE" D SETNODE2^HLCSDR2,CHKSUM^HLCSDR2

 S HLRETRY=HLRETRY+1 D MONITOR^HLCSDR2("P",2,HLDP,HLDOUT1,"OUT") G 7

10 ; Check Validity of Neg Acknowledgement

 I $D(HLTRACE) S HLNXST=10 D TRACE^HLCSDR2

 D MONITOR^HLCSDR2("VALIDATE NACK",5,HLDP)

 S HLCHK=$E(X,$L(X)-7,$L(X)),X=$E(X,1,$L(X)-8)

 S HLTRANS=$$VALID1^HLCSDR2("LLP-NACK",HLCHK)

 I HLTRANS="VALID" G 12

 S HLRETRY=HLRETRY+1 D MONITOR^HLCSDR2("P",2,HLDP,HLDOUT1,"OUT") G 7

12 ; Process Negative Acknowlegement

 I $D(HLTRACE) S HLNXST=12 D TRACE^HLCSDR2

 S HLACKBLK=$E(^TMP("HLCSDR1",$J,HLDP,2))

 D MONITOR^HLCSDR2($S("^B^C^X^"[(U_HLACKBLK_U):HLACKBLK,1:"G"),3,HLDP,HLDOUT1,"OUT")

 S HLRETRY=HLRETRY+1 D MONITOR^HLCSDR2("P",2,HLDP,HLDOUT1,"OUT") G 7

14 ; Make sure we should still be running

 I $D(HLTRACE) S HLNXST=14 D TRACE^HLCSDR2

 I $P($G(^HLCS(870,HLDP,0)),U,15)=1 G EXIT ; Shutdown receiver

 I $D(HLTRACE) U IO(0) W !,"Type Q to Quit: " R X:1 I "^Q^q^"[(U_X_U) S $P(^HLCS(870,HLDP,0),U,15)=1 G EXIT ; Shutdown receiver

G 6

EXIT ;

 D MONITOR^HLCSDR2("SHUTDOWN",5,HLDP)

HLCSDR1.m