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Routine: XML4CRC1

XML4CRC1.m

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  1. XML4CRC1 ;(WASH ISC)/RFJ-Block Mode Protocol ;04/17/2002 10:57
  1. ;;8.0;MailMan;**45**;Jun 28, 2002;Build 8
  1. OPEN D GET,OP
  1. S:'$D(XMESC) XMESC=$C(126) S:'$D(XMFS) XMFS=255 S:'$D(XM) XM="" S (XMSSQ,XMRSQ)=1 Q
  1. GET S X=XMCHAN,DIC="^DIC(3.4,",DIC(0)="Z" D ^DIC S XMCHAN=+Y
  1. I '$D(^DIC(3.4,XMCHAN,0)) S ER=1,Y="Invalid channel" Q
  1. G2 S XMPROT=$P(^DIC(3.4,XMCHAN,0),U,1)
  1. F X=1:1:4 S @($P("XMSEN^XMREC^XMOPEN^XMCLOSE",U,X))=$S($D(^(X)):^(X),1:"Q")
  1. Q
  1. OP I $D(XMOPEN) X:$L(XMOPEN) XMOPEN
  1. I '$D(XMQUIET) S X=255 X ^%ZOSF("RM")
  1. Q
  1. C X ^%ZOSF("EON")
  1. I $D(XMCLOSE) X:$L(XMCLOSE) XMCLOSE
  1. Q
  1. SEND ;Sends XMSG, returns ER=0 or 1, and XMLER=number of "soft" errors
  1. I $L(XMSG)>255 S XMLER=0,ER=1 G SRQ
  1. I XMSG'?.ANP S X=XMSG,XMSG="" F %=1:1:$L(X) S:$E(X,%)'?1C!($A(X,%)=9) XMSG=XMSG_$E(X,%)
  1. D SRINIT S X=XMSG,XMLCC=XMLCC+$L(XMSG) D SUM
  1. SL S XMLER=XMLER+1 I (XMLER+1)>XMLMAXER D NEWSTRAT
  1. I ER W XMLERR,$C(13) G SRQ
  1. D BUFLUSH W XMSG,$C(13) W XMLINE,U,XMSUM,$C(13) R XMLX:XMLTIME G:XMLX=(XMLINE_U_XMLACK) SRQ
  1. S XMLY=XMLX=(XMLINE_U_XMLNAK),XMLZ=0 D:'XMLY ENQ G SL:XMLY,SRQ
  1. ENQ ;Assume the ACK/NAK was garbled by noise and try to re-establish contact
  1. S XMLZ=XMLZ+1 I XMLZ>XMLMAXER S (ER,XMLY)=1 Q
  1. D BUFLUSH W XMLENQ,$C(13) R XMLX:XMLTIME Q:XMLX=(XMLINE_U_XMLACK)
  1. I XMLX[XMLACK!(XMLX[XMLNAK),+XMLX=XMLINE!(+XMLX=XMLINE-1) S XMLY=1 Q
  1. H 1 G ENQ
  1. REC ;Receives XMRG, returns ER=0 or 1, and XMLER=number of "soft" errors
  1. D SRINIT S:'$D(XMLAN) XMLAN=XMLINE_U_XMLNAK
  1. RL S XMLER=XMLER+1 I (XMLER+1)>XMLMAXER D NEWSTRAT I ER=1 G SRQ
  1. R XMRG#255:$S($D(XMSTIME):XMSTIME,1:XMLTIME) S XMLCC=$S('$D(XMLCC):$L(XMRG),1:XMLCC+$L(XMRG)),XMLZ=$S('$T:-1,XMRG=XMLENQ:0,XMRG=XMLERR:2,1:1),%=2
  1. S %=2 D PROG^XML4CRC I $D(XMLIN),XMLIN'<1 G REC^XML4CRC:XMRG["*"
  1. S ER=XMLZ=2 G:XMLZ>1 SRQ I XMLZ<1 D BUFLUSH W XMLAN,$C(13) G RL
  1. R XMLY:XMLTIME I +XMLY=XMLINE S X=XMRG D SUM S XMLZ=XMSUM=$P(XMLY,U,2) G RL2
  1. S XMLZ=0 I +XMLY=(XMLINE-1),XMLINE'=1 D BUFLUSH W +XMLY,U,XMLACK,$C(13) G RL
  1. RL2 D:$D(XMLBMER) KILL^XML4CRC S XMLAN=XMLINE_U_$S(XMLZ:XMLACK,1:XMLNAK) D BUFLUSH W XMLAN,$C(13)
  1. G SRQ:XMLZ,RL
  1. SRINIT ;Initialize variables for Send/Receive
  1. I '$D(XMLBTST) S XMLBTST=+$H_","_($P($H,",",2)-.001),XMLCC=0 ;Time stamp when message started
  1. S XMLINE=$S('$D(XMLINE):1,1:XMLINE+1),XMLACK="ACK",XMLNAK="NAK"
  1. S XMLENQ=$C(9)_"ENQ"_$C(9),XMLERR=$C(9)_"ERROR"_$C(9)
  1. S XMLER=-1 ;soft error count
  1. S XMLMAXER=5 ;maximum allowable soft errors
  1. S XMLTIME=10 ;length of READ time
  1. S ER=0 ;non-recoverable error flag
  1. Q
  1. NEWSTRAT ;Select new strategy, one or both machines may be slow
  1. I XMLMAXER=5 S ER=1 Q ;already tried new strategy, give up.
  1. S XMTLER=$S('$D(XMTLER):XMLER,1:XMTLER+XMLER),XMLER=0 ;add to total
  1. S XMLMAXER=5 ;reduce allowable soft errors
  1. S XMLTIME=30 ;increase the READ time
  1. Q
  1. SRQ ;Exit from Send/Receive
  1. S XMTLER=$S('$D(XMTLER):XMLER,1:XMTLER+XMLER) ;Total errors
  1. K XMLACK,XMLNAK,XMLENQ,XMLERR,XMLMAXER,XMLTIME,XMLX,XMLY,XMLZ
  1. Q
  1. BUFLUSH ;Flush any characters out of the buffer
  1. Q:'$D(XMBFLUSH)
  1. X ^%ZOSF("TRMON") S X=$P($H,",",2) F %=1:1 R %:0 Q:'$T S %=$P($H,",",2) S:%<X %=%+86400 Q:%-X>15
  1. X ^%ZOSF("TRMOFF") Q
  1. SUM ;Calculate checksum, accounting also for the character's position
  1. I '$D(XMOS) D LPC^XMLSWP0
  1. I $D(XMOS(0)) X XMOS(0) Q
  1. I XMOS["VAX DSM" X "S XMSUM=$ZC(%LPC,X)+$L(X)*$L(X)" Q
  1. I XMOS["DSM" X "S XMSUM=$ZC(LPC,X)+$L(X)*$L(X)" Q
  1. I XMOS["M/11"!(XMOS["M/VX") X "S XMSUM=$ZC(X)+$L(X)*$L(X)" Q
  1. S XMSUM=0 F %=1:1:$L(X) S XMSUM=XMSUM+($A(X,%)*%)
  1. Q