GNU bug report logs - #15825
unidata-gen seems messed up somehow

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Package: emacs;

Reported by: Glenn Morris <rgm <at> gnu.org>

Date: Thu, 7 Nov 2013 03:18:02 UTC

Severity: important

Found in version 24.3.50

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Eli Zaretskii <eliz <at> gnu.org>, Glenn Morris <rgm <at> gnu.org>
Cc: 15825 <at> debbugs.gnu.org
Subject: bug#15825: unidata-gen seems messed up somehow
Date: Fri, 08 Nov 2013 00:07:43 -0800

Eli Zaretskii wrote:
> What does 'sizeof' return for a struct that has array[0] at the end?

For something like this:

   struct s { ...; int data[]; };

C99 says sizeof (struct s) == offsetof (struct s, data).
C89 doesn't have this concept, so for portability
we do this in C89:

   struct s { ...; int data[1]; };

and use offsetof (struct s, data) instead of
sizeof (struct s), as the latter's wrong for C89.
This bug report was last modified 11 years and 280 days ago.

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