LEXAS7 ; ISL Look-up Check Input (LC,TC)          ; 09-23-96
 ;;2.0;LEXICON UTILITY;;Sep 23, 1996;Build 1
 ;
LC(LEXX) ; Leading characters
 ;
 ; LEXX    Return string
 ; LEXL    Letter
 ; LEXG    Group of letters
 ; LEXI    Incremental counter
 ; LEXT    Temporary tolken
 ; LEXOK   Flag - found tolken
 ; LEXS    Swap character
 ; LEXA    Add character
 ;
 N LEXT
 S LEXT=$$LCS(LEXX) I LEXT'=LEXX,$D(^LEX(757.01,"ASL",LEXT)) S LEXX=LEXT Q LEXT
 I $L(LEXT)'>5 Q LEXX
 S LEXT=$$LCR(LEXX) I $D(^LEX(757.01,"AWRD",LEXT)) S LEXX=LEXT Q LEXX
 I $L(LEXT)'>4 Q LEXX
 S LEXT=$$LCR(LEXX) I $D(^LEX(757.01,"AWRD",LEXT)) S LEXX=LEXT Q LEXX
 Q LEXX
 ;
LCS(LEXX) ; Swap
 N LEXI,LEXF,LEXL,LEXG,LEXOK,LEXS,LEXA S LEXOK=0
 S LEXF=$$FIRST(LEXX),LEXS=$$SECOND(LEXX)
 I $D(^LEX(757.01,"ASL",LEXS)) S LEXX=LEXS Q LEXX
 I $D(^LEX(757.01,"ASL",LEXF)) S LEXX=LEXF Q LEXX
 S LEXF=$$FIRST(LEXS)
 I $D(^LEX(757.01,"ASL",LEXF)) S LEXX=LEXF Q LEXX
 Q LEXX
LCR(LEXX) ; Remove/Shift
 N LEXT
 S LEXX=$E(LEXX,2,$L(LEXX))
 S LEXT=$$SHIFT^LEXAS3(LEXX)
 I $D(^LEX(757.01,"ASL",LEXT)) S LEXX=LEXT Q LEXX
 Q LEXX
SECOND(LEXX) ; Second letter (Swap)
 N LEXL,LEXG,LEXOK,LEXI,LEXA,LEXS
 S LEXL=$E(LEXX,2),LEXG=$$GRP(LEXL),LEXOK=0
 F LEXI=1:1:$L(LEXG)  D  Q:LEXOK
 . S LEXS=$E(LEXX,1)_$E(LEXG,LEXI)_$E(LEXX,3,$L(LEXX))
 . I $D(^LEX(757.01,"ASL",LEXS)) S LEXX=LEXS,LEXOK=1 Q
 . S LEXS=$$TP^LEXAS6(LEXS)
 . I $D(^LEX(757.01,"ASL",LEXS)),$L(LEXS)=$L(LEXX) S LEXX=LEXS,LEXOK=1 Q
 . S LEXS=$$ONE^LEXAS2(LEXS) Q:LEXS=""
 . I $D(^LEX(757.01,"ASL",LEXS)),$L(LEXS)=$L(LEXX) S LEXX=LEXS,LEXOK=1 Q
 Q:LEXOK LEXX
 ; Second letter (Add)
 S LEXOK=0 F LEXI=65:1:90 D  Q:LEXOK
 . S LEXA=$E(LEXX,1)_$C(LEXI)_$E(LEXX,2,$L(LEXX))
 . I $D(^LEX(757.01,"ASL",LEXA)) S LEXX=LEXA,LEXOK=1 Q
 Q LEXX
 ;
FIRST(LEXX) ; First letter (Swap)
 N LEXL,LEXG,LEXOK,LEXI,LEXA,LEXS
 S LEXL=$E(LEXX,1),LEXG=$$GRP(LEXL),LEXOK=0
 F LEXI=1:1:$L(LEXG)  D  Q:LEXOK
 . S LEXS=$E(LEXG,LEXI)_$E(LEXX,2,$L(LEXX))
 . I $D(^LEX(757.01,"ASL",LEXS)) S LEXX=LEXS,LEXOK=1 Q
 . S LEXS=$$LF(LEXS)
 . I $D(^LEX(757.01,"ASL",LEXS)) S LEXX=LEXS,LEXOK=1 Q
 Q:LEXOK LEXX
 ;
 ; First letter (Add)
 S LEXOK=0 F LEXI=65:1:90 D  Q:LEXOK
 . S LEXA=$C(LEXI)_LEXX
 . I $D(^LEX(757.01,"ASL",LEXA)) S LEXX=LEXA,LEXOK=1 Q
 Q LEXX
LF(LEXX) ;
 Q:$L($G(LEXX))'>7 LEXX
 N LEXN,LEXC,LEXT,LEXF,LEXO,LEXOK
 S (LEXN,LEXC)=$E(LEXX,1,4) Q:'$D(^LEX(757.01,"ASL",LEXN)) LEXX
 S LEXT=$P(LEXX,LEXN,2) Q:$L(LEXT)<4 LEXX
 S LEXOK=0,LEXO=$$SCH^LEXAS6(LEXN)
 S LEXT=$E(LEXT,($L(LEXT)-6),$L(LEXT))
 F  S LEXO=$O(^LEX(757.01,"AWRD",LEXO)) Q:LEXO=""!(LEXO'[LEXC)!(LEXOK)  D
 . S LEXF=$E(LEXO,($L(LEXO)-($L(LEXT)-1)),$L(LEXO))
 . I LEXF=LEXT S LEXT=LEXO,LEXOK=1
 I LEXOK S LEXX=LEXT
 Q LEXX
TC(LEXX) ; Trailing character
 Q:$L(LEXX)<6 LEXX
 N LEXC,LEXT,LEXLC,LEXO,LEXOK,LEXCL
 S LEXCL=$L(LEXX),LEXC=$$TRIM^LEXAS6(LEXX),LEXC=$E(LEXC,1,($L(LEXC)-1))
 S LEXLC=$E(LEXX,$L(LEXX)),LEXO=$$SCH^LEXAS6(LEXC),LEXOK=0,LEXT=""
 ;
 F  S LEXO=$O(^LEX(757.01,"AWRD",LEXO)) Q:LEXO=""!(LEXO'[LEXC)!(LEXOK)  D
 . Q:$E(LEXO,$L(LEXO))'=LEXLC
 . ; Exact
 . I $E(LEXO,LEXCL)=LEXLC S LEXT=LEXO,LEXOK=1 Q
 . ; 1 Less
 . I $E(LEXO,(LEXCL-1))=LEXLC S LEXT=LEXO,LEXOK=1 Q
 I LEXT'="",LEXOK S LEXX=LEXT
 Q LEXX
 ;
GRP(LEXX) ; Letter groups (off the home row QWERTY)
 N LEXG S LEXG=LEXX
 S:LEXX="A" LEXG="QZOWSX" S:LEXX="B" LEXG="VGHNF"
 S:LEXX="C" LEXG="XDVFS" S:LEXX="D" LEXG="ECXRFSWV"
 S:LEXX="E" LEXG="RWIDFS" S:LEXX="F" LEXG="GBVDRCET"
 S:LEXX="G" LEXG="FBTVRHYN" S:LEXX="H" LEXG="JGNYBUMT"
 S:LEXX="I" LEXG="UOYEKJL" S:LEXX="J" LEXG="HNKUMYI"
 S:LEXX="K" LEXG="IJLMOU" S:LEXX="L" LEXG="OKPI"
 S:LEXX="M" LEXG="NJKH" S:LEXX="N" LEXG="MBJH"
 S:LEXX="O" LEXG="LIPAK" S:LEXX="P" LEXG="OL"
 S:LEXX="Q" LEXG="AWS" S:LEXX="R" LEXG="TEGFD"
 S:LEXX="S" LEXG="XWADZE" S:LEXX="T" LEXG="RGFYH"
 S:LEXX="U" LEXG="YHIJK" S:LEXX="V" LEXG="CBFDG"
 S:LEXX="W" LEXG="QESAD" S:LEXX="X" LEXG="ZSACD"
 S:LEXX="Y" LEXG="UHIJGT" S:LEXX="Z" LEXG="ASX"
 S:LEXG'=LEXX LEXX=LEXG
 Q LEXX
 Q