From: Alejandro Colomar <colomar.6.4.3@gmail.com>
To: libc-alpha@sourceware.org
Subject: Expose 'array_length()' macro in <sys/cdefs.h> or <sys/param.h>
Date: Mon, 21 Sep 2020 01:00:07 +0200 [thread overview]
Message-ID: <946e9377-0558-3adf-3eb9-38c507afe2d0@gmail.com> (raw)
Hi,
I'd like to propose exposing the macro 'array_length()' as defined in
'include/array_length.h' to the user.
Libbsd provides '__arraycount()' in <sys/cdefs.h> and some BSDs provide
'nitems()' in <sys/param.h>, so any of those 2 headers may be a good
place to do it.
That would provide a safe macro for many users that don't know how to
write it safely, or just don't feel like typing a few extra lines, and
it would also help not needing to write such a macro for all projects,
because really most of them need it.
Also, the new GCC warning -Wsizeof-pointer-div has some problems:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94746
What do you think about it?
Thanks,
Alex
next reply other threads:[~2020-09-20 23:00 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-20 23:00 Alejandro Colomar [this message]
2020-09-21 8:38 ` Florian Weimer
2020-09-21 10:11 ` Alejandro Colomar
2020-09-21 10:33 ` Florian Weimer
2020-09-21 12:47 ` Alejandro Colomar
2020-09-21 15:47 ` [libc-coord] " enh
2020-09-22 16:25 ` Rich Felker
2020-09-22 16:44 ` Jonathan Wakely
2020-09-22 16:53 ` Ville Voutilainen
2020-09-21 14:01 ` Jonathan Wakely
2020-09-21 21:52 ` Expose 'array_length()' macro in <sys/param.h> Alejandro Colomar
2020-09-21 22:04 ` Jonathan Wakely
2020-09-21 22:13 ` Ville Voutilainen
2020-09-22 9:10 ` Alejandro Colomar
2020-09-22 9:40 ` Jonathan Wakely
2020-09-22 10:01 ` Florian Weimer
2020-09-22 10:35 ` Alejandro Colomar
2020-09-22 11:40 ` Florian Weimer
2020-09-22 14:58 ` [RFC] <sys/param.h>: Add nitems() and snitems() macros Alejandro Colomar
2020-09-25 13:20 ` [PATCH v2] " Alejandro Colomar
2020-09-25 14:10 ` Alejandro Colomar
2020-09-25 14:48 ` Jonathan Wakely
2020-09-25 16:30 ` Alejandro Colomar
2020-09-25 17:39 ` Jonathan Wakely
2020-09-25 17:42 ` Jonathan Wakely
2020-09-25 17:46 ` Alejandro Colomar
2020-09-25 19:37 ` [PATCH v3] <sys/param.h>: Add nitems() Alejandro Colomar
2020-09-22 9:16 ` [libc-coord] Re: Expose 'array_length()' macro in <sys/param.h> Florian Weimer
2020-09-30 15:58 ` Expose 'array_length()' macro in <sys/cdefs.h> or <sys/param.h> Joseph Myers
2020-09-30 20:39 ` Alejandro Colomar
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