Chimie Théorique » OpenPath

SUBROUTINE Expand(List,Idx,Dim)

  ! This subroutine expands a list entered in a compacted form

  ! ie 1 -10 => 1 2 3  4 5 6 7 8 9 10

  use VarTypes

  INTEGER(KINT), INTENT(IN) :: Dim

  INTEGER(KINT), INTENT(INOUT) :: List(Dim)

  INTEGER(KINT), INTENT(INOUT) :: Idx

  LOGICAL, ALLOCATABLE :: FTmp(:) ! Dim

  LOGICAL :: Debug

  INTEGER(KINT) :: i

  INTERFACE

     function valid(string) result (isValid)

       CHARACTER(*), intent(in) :: string

       logical                  :: isValid

     END function VALID

  END INTERFACE

  Debug=valid('Expand')

  Allocate(FTmp(Dim))

  FTmp=.FALSE.

  Idx=1

  DO WHILE (List(Idx).NE.0)

     If (List(Idx).LT.0) THEN

        DO I=List(Idx-1),abs(List(Idx))

           IF (.NOT.FTmp(I)) THEN

              FTmp(I)=.TRUE.

           END IF

        END DO

     ELSEIF (.NOT.FTmp(List(Idx))) THEN

        FTmp(List(Idx))=.TRUE.

     END IF

     Idx=Idx+1

  END DO

  if (debug) WRITE(*,*) "DBG Expand,  List",List

  ! We convert List into non compacted form

  Idx=1

  DO I=1,Dim

     If(Ftmp(I)) THEN

        List(Idx)=I

        Idx=Idx+1

     END IF

  END DO

  List(Idx)=0

  Idx=Idx-1

 DEALLOCATE(Ftmp)

END SUBROUTINE Expand