| ! { dg-do run { target fd_truncate } } |
| ! PR35132 Formatted stream I/O write should truncate. |
| ! Test case adapted from PR by Jerry DeLisle <jvdelisle@gcc.gnu.org> |
| program main |
| implicit none |
| character(len=6) :: c |
| integer :: i, newline_length |
| |
| open(20,status="scratch",access="stream",form="formatted") |
| write(20,"()") |
| inquire(20,pos=newline_length) |
| newline_length = newline_length - 1 |
| if (newline_length < 1 .or. newline_length > 2) STOP 1 |
| close(20) |
| |
| open(20,file="foo_streamio_15.txt",form="formatted",access="stream") |
| write(20,'(A)') '123456' |
| write(20,'(A)') 'abcdef' |
| write(20,'(A)') 'qwerty' |
| rewind 20 |
| ! Skip over the first line |
| read(20,'(A)') c |
| if (c.ne.'123456') STOP 2 |
| ! Save the position |
| inquire(20,pos=i) |
| if (i.ne.7+newline_length) STOP 3 |
| ! Read in the complete line... |
| read(20,'(A)') c |
| if (c.ne.'abcdef') STOP 4 |
| ! Write out the first four characters |
| write(20,'(A)',pos=i,advance="no") 'ASDF' |
| ! Fill up the rest of the line. Here, we know the length. If we |
| ! don't, things will be a bit more complicated. |
| write(20,'(A)') c(5:6) |
| ! Copy the file to standard output |
| rewind 20 |
| c = "" |
| read(20,'(A)') c |
| if (c.ne.'123456') STOP 5 |
| read(20,'(A)') c |
| if (c.ne.'ASDFef') STOP 6 |
| read(20,'(A)', iostat=i) c |
| if (i /= -1) STOP 7 |
| close (20, status="delete") |
| end program main |
