| 1 |
chuckv |
4 |
!------------------------------------------------------------------------ |
| 2 |
|
|
! Files Module |
| 3 |
|
|
!----------------------------------------------------------------------- |
| 4 |
|
|
! Functions: |
| 5 |
|
|
! |
| 6 |
|
|
! NEXT_UNIT Returns the next available fortran unit number. |
| 7 |
|
|
! |
| 8 |
|
|
! Uses the fortran 90 inquire statement to find next unit. |
| 9 |
|
|
! |
| 10 |
|
|
!----------------------------------------------------------------------- |
| 11 |
|
|
module file_units |
| 12 |
|
|
|
| 13 |
|
|
use definitions, ONLY : max_units |
| 14 |
|
|
use io_units, ONLY : INPUT_UNIT,OUTPUT_UNIT |
| 15 |
|
|
|
| 16 |
|
|
|
| 17 |
|
|
contains |
| 18 |
|
|
|
| 19 |
|
|
function next_unit() result(unit_number) |
| 20 |
|
|
|
| 21 |
|
|
! result variable |
| 22 |
|
|
integer :: unit_number |
| 23 |
|
|
|
| 24 |
|
|
! local scalar variables |
| 25 |
|
|
integer :: i, unit |
| 26 |
|
|
logical :: is_opened |
| 27 |
|
|
|
| 28 |
|
|
!. initialize unit number to return -1 |
| 29 |
|
|
! we can use this to error check |
| 30 |
|
|
unit = -1 |
| 31 |
|
|
|
| 32 |
|
|
is_opened = .true. |
| 33 |
|
|
|
| 34 |
|
|
! do while unit is opened |
| 35 |
|
|
|
| 36 |
|
|
find_unit: do i = 10, max_units |
| 37 |
|
|
|
| 38 |
|
|
! check to make sure that we don't assign input or |
| 39 |
|
|
! output streams |
| 40 |
|
|
|
| 41 |
|
|
if ( ( i /= input_unit) .and. (i /= output_unit) ) then |
| 42 |
|
|
|
| 43 |
|
|
inquire (i, opened = is_opened) |
| 44 |
|
|
|
| 45 |
|
|
if ( .not. is_opened ) then |
| 46 |
|
|
unit = i |
| 47 |
|
|
exit find_unit |
| 48 |
|
|
end if |
| 49 |
|
|
end if |
| 50 |
|
|
end do find_unit |
| 51 |
|
|
|
| 52 |
|
|
unit_number = unit |
| 53 |
|
|
|
| 54 |
|
|
end function next_unit |
| 55 |
|
|
|
| 56 |
|
|
end module file_units |
