!*<MODHII>*********************************************************

MODULE MODHII

  real, allocatable :: zgas(:),qhi(:),qx(:),qhei(:),qo(:),lines(:,:)
  integer, allocatable :: gridn(:)
  real :: zup,zlow
  integer :: diz,kk1,kk2
  integer :: n_mod
  
contains

  !*<READHII>***********************************************************
  !
  ! This subroutine reads HII region libraries
  !
  SUBROUTINE READHII(filename)
    
    use MODRIGHE, only: nr_tot
    implicit none
    character(len=*) :: filename
    character(len=1) :: a
    integer :: i
    integer, allocatable :: intlines(:,:)
    !
    write(*,'(a)')"reading HII library "//filename//".dat ...."
    
    ! it count the numbers of rows in the file
    open(unit=88,file=filename//'.dat',status='old')
    n_mod=-1 ! there is one header row
    do
       read(unit=88,fmt='(a)',end=100)a
       n_mod=n_mod+1
    enddo
100 continue
    close(88)
    
    ! deallocation of arrays if already allocated
    if (allocated(zgas)) then
       deallocate(zgas) 
       deallocate(qhi) 
       deallocate(qx)
       deallocate(qhei)
       deallocate(qo) 
       deallocate(gridn)
       deallocate(lines)
    endif
    
    allocate(zgas(n_mod))
    allocate(qhi(n_mod))
    allocate(qx(n_mod))
    allocate(qhei(n_mod))
    allocate(qo(n_mod))
    allocate(gridn(n_mod))
    allocate(lines(nr_tot,n_mod),intlines(nr_tot,n_mod))
    
    open(unit=88,file=filename//'.dat',status='old')
    read(88,fmt='(a)')a
    
    do i=1,n_mod
       read(88,500)gridn(i),zgas(i),qhi(i),qx(i),qhei(i),qo(i),intlines(:,i)
    enddo
    close(88)
    
    write(*,*)"OK!"
    
    qhi=10.**qhi
    qx=10.**qx
    
    where (qhei .gt.-33.)
       qhei=10.**qhei
    elsewhere
       qhei=0.
    end where
    
    where (qhei .gt.-33.)
       qo=10.**qo
    elsewhere
       qo=0.
    end where
    
    where (intlines .ne. 0) 
       lines=exp(intlines/1000.-50.) ! [lines]=10^30 erg/s 
    elsewhere
       lines=0.
    endwhere
    
    deallocate(intlines)
    
    !           gridn,zgas,    qhi,     qx,   qhei,     qo,intfluxriga
500 format (14x,i1,1x,f5.4,8x,f8.4,1x,f8.4,1x,f8.4,1x,f8.4,1x,114i5)
    
  END SUBROUTINE READHII
  
end MODULE MODHII