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DIDU1	;SEA/TOAD-VA FileMan: DD Tools, IENS Check ;7/17/94  17:28 ;
	;;21.0;VA FileMan;;Dec 28, 1994
	;Per VHA Directive 10-93-142, this routine should not be modified.
	
IEN(DIENS,DIFLAGS)	;
	;ENTRY POINT--return whether the IEN String is valid
	;extrinsic function, all passed by value
	I $G(DIENS)="" Q 0
	I $G(DIFLAGS,"N")'="N" Q 0
	S DIFLAGS=$G(DIFLAGS)
	N DICHAR,DICRSR,DIPIECE,DISEQ,DIOUT,DIVALID
	S DIPIECE="",DISEQ="",DIOUT=0,DIVALID=1
	F DICRSR=1:1 D  I DIOUT Q
	.S DIPIECE=$P(DIENS,",",DICRSR)
	.I DIPIECE="" D  Q
	..I $P(DIENS,",",DICRSR,999)="" S DIOUT=1 Q
I1	..I DICRSR=1 Q
	..S DIOUT=1,DIVALID=0
	..Q
	.I +DIPIECE=DIPIECE S DIVALID=DIPIECE>0,DIOUT='DIVALID Q
	.I DIFLAGS["N" S DIVALID=0,DIOUT=1 Q
	.S DICHAR=$E(DIPIECE,1,2) I DICHAR'="?+" S DICHAR=$E(DICHAR)
	.I DICHAR'="+",DICHAR'="?",DICHAR'="?+" S DIOUT=1,DIVALID=0 Q
	.I $P(DIPIECE,DICHAR,2,9999)?1N.N D  Q
	..S DISEQ=$P(DIPIECE,DICHAR,2,999)
	..S DIOUT=+DISEQ'=DISEQ!$D(DISEQ(DISEQ)),DIVALID='DIOUT Q
I2	.S DIOUT=1,DIVALID=0
	.Q
	Q $E(DIENS,$L(DIENS))=","&DIVALID
	;
PROOT(DIFILE,DIENS)	;
	;ENTRY POINT--return the global root of a subfile's parent
	;extrinsic function, all passed by value
	Q $$ROOT^DILFD($$PARENT(DIFILE),$P(DIENS,",",2,999),1)
	;
PARENT(DIFILE)	;
	;ENTRY POINT--return the file number of a subfile's parent
	;extrinsic function, all passed by value
	Q $G(^DD(DIFILE,0,"UP"))
	;
PARENTS(DIFILE,DIRULE)	;
	;IEN--return the file's parents
	;procedure, passed by ref
	N DIBACK,DIOUT,DIMOM,DITEMP
	S DIOUT=0,DIMOM=DIFILE
	S DITEMP=DIFILE K DIFILE S (DIFILE,DIFILE("C"))=DITEMP
	S DIFILE("L")=$$LEVEL(DIFILE)
	S DIFILE(1)=DIFILE
	I '$D(DIRULE("L",DIFILE)) S DIRULE("L",DIFILE)=DIFILE("L")
	F DIBACK=2:1 D  I DIOUT Q
	.S DITEMP=DIMOM
	.S DIMOM=$G(DIRULE("UP",DITEMP))
PA1	.I DIMOM="" D  I DIOUT Q
	..S DIMOM=$G(^DD(DITEMP,0,"UP"))
	..I DIMOM="" S DIOUT=1 Q
	..S DIRULE("UP",DITEMP)=DIMOM
	..I '$D(DIRULE("L",DIMOM)) S DIRULE("L",DIMOM)=DIFILE("L")-DIBACK+1
	..Q
	.S DIFILE(DIBACK)=DIMOM
	.Q
	Q
	;
LEVEL(DIFILE)	;
	;IEN--return the file's level (# parents +1)
	;function, pass by value
	N DIMOM
	I '$G(DIFILE) Q 0
	S DIMOM=$G(^DD(DIFILE,0,"UP"))
	I DIMOM="" Q 1
	Q $$LEVEL(DIMOM)+1
	;