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Date:	Sat, 20 Jul 2013 12:51:08 +0200
From:	Juan Manuel Guerrero <juan DOT guerrero AT gmx DOT de>
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To:	djgpp-workers AT delorie DOT com
Subject:	Re: Set _IOERR if the file stream has been opened in wrong mode.
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Reply-To:	djgpp-workers AT delorie DOT com

Am 20.07.2013 03:26, schrieb Rugxulo:
> Hi,
>
> On Fri, Jul 19, 2013 at 7:18 PM, Juan Manuel Guerrero
> <juan DOT guerrero AT gmx DOT de> wrote:
>> Am 18.07.2013 06:59, schrieb DJ Delorie:
>>
>> If I get no positive response or any response at all, I will not insiste in
>> this issue anymore and assume that it is prefered to keep the current
>> behavior of the library.
> (It's not really my decision, so this is just an opinion.) Sure, fine,
> go ahead and patch it. But I still think it's sloppy on their end
> (Lua, et al.) to use such a broken idiom. But there's no reason to be
> too stubborn if actual code relies on it.
>
> P.S. I'm not subscribed to the Lua mailing list, but apparently that's
> the preferred way to report bugs, etc. If you'd like, I'll go ahead
> and subscribe and then forward your findings and report back any
> relevant comments.


Feel free to go ahead reporting this issue.  I have no objections, I may
follow the discussion started by you in that mailing list but I will neither
subscribe to that list nor participate in the discussion.  If you want to
contact me you can use this one or comp.os.msdos.djgpp.

This time, to check the lua port I have decided to use their test suite
available as: http://www.lua.org/tests/5.2/lua-5.2.2-tests.tar.gz.
As you may know they claim:

"The tests will print lots of different messages, but no assertion should ever fail.
  If the test goes all its way to the end, printing a "final OK" message, then all went well.

  Note that, by its very nature, Lua is heavily dependent on the underlying standard C libraries.
  Sometimes the test suite fails because these underlying C libraries do not follow the ANSI standard.
  There is not much we can do about it."

This way I discovered two issues.  The first was the rounding bug for hex
string conversion in strto[d|f|ld] and the second one and much more
difficult to debug was this one.  With these fixes the (small) test suite
passes.  The big test suite fails with djgpp and with linux.  Here a lot
of posix and/or ansi support is missing and I will certainly not try to
implement it.

It would be interesting to know how they know that it can be taken for
granted that a stream error condition will be triggered and the error indicator
will be set by code like the sample code I posted.


Regards,
Juan M. Guerrero

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