diff options
Diffstat (limited to 'gcc/testsuite/gfortran.dg/direct_io_12.f90')
| -rw-r--r-- | gcc/testsuite/gfortran.dg/direct_io_12.f90 | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/direct_io_12.f90 b/gcc/testsuite/gfortran.dg/direct_io_12.f90 new file mode 100644 index 000000000..533670272 --- /dev/null +++ b/gcc/testsuite/gfortran.dg/direct_io_12.f90 @@ -0,0 +1,33 @@ +! { dg-do run } +! +! PR fortran/43551 +! +! Writes a 672000 byte file with buffering. The writing failed because +! of a missing lseek. + +implicit none +integer, parameter :: size = 2800 ! << needs to be large enough +real(8) :: vec1(size,30), dummy(size) +integer i + +CALL RANDOM_NUMBER(vec1) + +open(99, file='test.dat', form='unformatted', access='direct', recl=size*8) +do i = 1, 10 + write(99,rec=i) vec1(:,i) + write(99,rec=i+10) vec1(:,i+10) + write(99,rec=i+20) vec1(:,i+20) ! << rec = 30 was written to rec = 21 +end do + +do i = 1, 10 + read(99,rec=i) dummy + if (any (dummy /= vec1(:,i))) call abort() + read(99,rec=i+10) dummy + if (any (dummy /= vec1(:,i+10))) call abort() + read(99,rec=i+20) dummy + if (any (dummy /= vec1(:,i+20))) call abort() ! << aborted here for rec = 21 +end do + +close(99, status='delete') +end + |