107 lines
2.8 KiB
Fortran
107 lines
2.8 KiB
Fortran
! { dg-do run }
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! PR31052 Bad IOSTAT values when readings NAMELISTs past EOF.
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! Patch derived from PR, submitted by Jerry DeLisle <jvdelisle@gcc.gnu.org>
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program gfcbug61
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implicit none
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integer :: stat
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open (12, status="scratch")
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write (12, '(a)')"!================"
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write (12, '(a)')"! Namelist REPORT"
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write (12, '(a)')"!================"
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write (12, '(a)')" &REPORT type = 'SYNOP' "
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write (12, '(a)')" use = 'active'"
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write (12, '(a)')" max_proc = 20"
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write (12, '(a)')" /"
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write (12, '(a)')"! Other namelists..."
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write (12, '(a)')" &OTHER i = 1 /"
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rewind (12)
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! Read /REPORT/ the first time
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rewind (12)
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call position_nml (12, "REPORT", stat)
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if (stat.ne.0) call abort()
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if (stat == 0) call read_report (12, stat)
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! Comment out the following lines to hide the bug
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rewind (12)
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call position_nml (12, "MISSING", stat)
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if (stat.ne.-1) call abort ()
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! Read /REPORT/ again
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rewind (12)
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call position_nml (12, "REPORT", stat)
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if (stat.ne.0) call abort()
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contains
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subroutine position_nml (unit, name, status)
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! Check for presence of namelist 'name'
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integer :: unit, status
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character(len=*), intent(in) :: name
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character(len=255) :: line
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integer :: ios, idx, k
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logical :: first
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first = .true.
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status = 0
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ios = 0
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line = ""
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do k=1,10
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read (unit,'(a)',iostat=ios) line
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if (first) then
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first = .false.
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end if
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if (ios < 0) then
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! EOF encountered!
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backspace (unit)
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status = -1
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return
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else if (ios > 0) then
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! Error encountered!
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status = +1
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return
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end if
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idx = index (line, "&"//trim (name))
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if (idx > 0) then
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backspace (unit)
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return
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end if
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end do
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end subroutine position_nml
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subroutine read_report (unit, status)
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integer :: unit, status
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integer :: iuse, ios, k
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!------------------
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! Namelist 'REPORT'
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!------------------
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character(len=12) :: type, use
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integer :: max_proc
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namelist /REPORT/ type, use, max_proc
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!-------------------------------------
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! Loop to read namelist multiple times
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!-------------------------------------
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iuse = 0
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do k=1,5
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!----------------------------------------
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! Preset namelist variables with defaults
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!----------------------------------------
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type = ''
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use = ''
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max_proc = -1
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!--------------
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! Read namelist
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!--------------
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read (unit, nml=REPORT, iostat=ios)
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if (ios /= 0) exit
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iuse = iuse + 1
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end do
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if (iuse.ne.1) call abort()
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status = ios
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end subroutine read_report
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end program gfcbug61
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