Ag. D. Hatzimanikas schrieb:
> Hi,
>
> I was running a function, (say write()) to call redir to write in a
> file and then another function, (say read()) to call readfile to read
> the last entry from that same file, when I discovered that in every
> second call to those functions, readfile couldn't read the last line of
> the file, although the redirection was successful and the file was
> written properly.
>
> After some tests I was able to create a reproducible example; below is
> that function.
>
>
> function! Test(...)
> let list = [0, 1]
> let nr = 1
> while nr < 10
> let len = len(list)
> echo "\n"
> redir >> test
> echo join(list)
" instead try
echon join(list)."\n"
> redir END
> let nr += 1
> call add(list, nr)
> if a:0 != 0
> exec a:1.'sleep'
> endif
> let lastline = join(readfile('test')[-1:])
> let lenlastline = len(split(lastline))
> if len != lenlastline
> echo lastline
> echohl Error
> echo "this pair is different"
> echohl NONE
> break
> endif
> echo lastline
> endwhile
> endfunction
>
> The function takes an optional argument to add a delay (between writing
> and reading).
>
> Now double (at least) run this function and observe (if it is reproducible)
> in that in every second call to the function, at least in one pair of lines,
> the first line is different than the second.
>
> Try then:
>
> echo readfile('test')[-1:]
>
> readfile cannot read the last line, while the line was written, check
> this with:
>
> echo system('tail -1 test')
>
> If this test is reproducible, is there an explanation?
>
>
> VIM - Vi IMproved 7.2a BETA (2008 Jun 24, compiled Jul 10 2008 13:40:07)
> Included patches: 1-19
>
> Huge version in Linux 2.6.25.10, with (GNU libc) 2.7.
>
> Regards,
>
> Ag.
Hmm, from my testing: :redir works a bit strange. While you think
:echo "line" sends "line\n", actually "\nline" is redirected. That's
why you get a first empty line in the file and the final EOL is missing.
And readfile() doesn't like files with missing EOL at the end.
--
Andy
--~--~---------~--~----~------------~-------~--~----~
You received this message from the "vim_dev" maillist.
For more information, visit http://www.vim.org/maillist.php
-~----------~----~----~----~------~----~------~--~---
