source: IHS-VA_UTILITIES-XB/trunk/XBPFTV.m@ 642

XBPFTV(F,E,V)   ; IHS/ADC/GTH - RETURN POINTER FIELD TERMINAL VALUE ; [ 02/07/97   3:02 PM ]
        ;;4.0;XB;;Jul 20, 2009;Build 2
        ;
        ; NOTE TO PROGRAMMERS;  Use entry point PFTV.  Do not use
        ; the first line of this routine, as pending initiatives
        ; in MDC might make a formal list on the first line of a
        ; routine invalid.     GTH 07-10-95
        ;
        ; Given a file number, file entry number, and variable
        ; name into which the results will be placed, return the
        ; terminal value after following the pointer chain.
        ;
        ; U must exist and have a value of "^"
        ;
        ; Formal list:
        ;
        ; 1) F  = file number (call by value)
        ; 2) E  = file entry number (call by value)
        ; 3) V  = variable for results (call by reference)
        ;
        ; Scratch vars:
        ; D = Flag, 1 = Done, 0 = continue
        ; G = Global for file F.
        ;
        ; *** NO ERROR CHECKING DONE ***
        ;
        G START
        ;
        ; The below PEP should be used in case the current movement to
        ; not allow a formal list of parameters on the first line of a
        ; routine passes thru MDC.
        ;
PFTV(F,E,V)     ;PEP - Return Pointer Field Terminal Value.
        ;
START   ;
        NEW D,G
        F  D TRACE Q:D
        Q
        ;
TRACE   ; FOLLOW POINTER CHAIN
        S D=1,V=E
        Q:'E
        S G=^DIC(F,0,"GL")
        Q:'$D(@(G_E_",0)"))
        S V=$P(@(G_E_",0)"),U)
        Q:$P(^DD(F,.01,0),U,2)'["P"
        S F=+$P($P(^DD(F,.01,0),U,2),"P",2)
        Q:'$D(@(G_E_",0)"))
        S E=$P(@(G_E_",0)"),U)
        S D=0
        Q
        ;