[6] | 1 | module m_io |
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| 2 | |
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| 3 | ! |
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| 4 | ! Basic I/O tools |
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| 5 | ! |
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| 6 | integer, public, save :: io_eor, io_eof |
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| 7 | |
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| 8 | public :: get_unit, setup_io |
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| 9 | private :: find_eor_eof |
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| 10 | |
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| 11 | CONTAINS |
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| 12 | |
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| 13 | ! ---------------------------------------------------------------------- |
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| 14 | subroutine setup_io() |
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| 15 | call find_eor_eof(io_eor, io_eof) |
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| 16 | end subroutine setup_io |
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| 17 | |
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| 18 | ! ---------------------------------------------------------------------- |
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| 19 | subroutine get_unit(lun,iostat) |
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| 20 | |
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| 21 | ! Get an available Fortran unit number |
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| 22 | |
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| 23 | integer, intent(out) :: lun |
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| 24 | integer, intent(out) :: iostat |
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| 25 | |
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| 26 | integer :: i |
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| 27 | logical :: unit_used |
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| 28 | |
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| 29 | do i = 10, 99 |
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| 30 | lun = i |
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| 31 | inquire(unit=lun,opened=unit_used) |
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| 32 | if (.not. unit_used) then |
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| 33 | iostat = 0 |
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| 34 | return |
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| 35 | endif |
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| 36 | enddo |
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| 37 | iostat = -1 |
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| 38 | lun = -1 |
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| 39 | end subroutine get_unit |
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| 40 | ! ---------------------------------------------------------------------- |
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| 41 | |
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| 42 | subroutine find_eor_eof(io_eor,io_eof) |
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| 43 | ! |
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| 44 | ! Determines the values of the iostat values for End of File and |
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| 45 | ! End of Record (in non-advancing I/O) |
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| 46 | ! |
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| 47 | integer, intent(out) :: io_eor |
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| 48 | integer, intent(out) :: io_eof |
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| 49 | |
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| 50 | integer :: lun, iostat |
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| 51 | character(len=1) :: c |
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| 52 | |
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| 53 | call get_unit(lun,iostat) |
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| 54 | |
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| 55 | if (iostat /= 0) stop "Out of unit numbers" |
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| 56 | |
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| 57 | open(unit=lun,status="scratch",form="formatted", & |
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| 58 | action="readwrite",position="rewind",iostat=iostat) |
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| 59 | if (iostat /= 0) stop "Cannot open test file" |
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| 60 | |
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| 61 | write(unit=lun,fmt=*) "a" |
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| 62 | write(unit=lun,fmt=*) "b" |
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| 63 | |
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| 64 | rewind(unit=lun) |
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| 65 | |
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| 66 | io_eor = 0 |
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| 67 | do |
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| 68 | read(unit=lun,fmt="(a1)",advance="NO",iostat=io_eor) c |
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| 69 | if (io_eor /= 0) exit |
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| 70 | enddo |
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| 71 | |
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| 72 | io_eof = 0 |
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| 73 | do |
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| 74 | read(unit=lun,fmt=*,iostat=io_eof) |
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| 75 | if (io_eof /= 0) exit |
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| 76 | enddo |
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| 77 | |
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| 78 | !!!!!!!!print *, "IO_EOR, IO_EOF: ", io_eor, io_eof |
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| 79 | |
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| 80 | close(unit=lun,status="delete") |
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| 81 | |
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| 82 | end subroutine find_eor_eof |
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| 83 | |
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| 84 | ! ---------------------------------------------------------------------- |
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| 85 | end module m_io |
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| 86 | |
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| 87 | |
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| 88 | |
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| 89 | |
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| 90 | |
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| 91 | |
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| 92 | |
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| 93 | |
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| 94 | |
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