From: Jan Engelhardt <jengelh@inai.de>
To: Bernd Petrovitsch <bernd@petrovitsch.priv.at>
Cc: "J. Bruce Fields" <bfields@fieldses.org>,
linux-kernel@vger.kernel.org, Jim Rees <rees@umich.edu>
Subject: Re: [PATCH] strings: helper for maximum decimal encoding of an unsigned integer
Date: Fri, 14 Sep 2012 14:59:28 +0200 (CEST) [thread overview]
Message-ID: <alpine.LNX.2.01.1209141456290.18169@frira.zrqbmnf.qr> (raw)
In-Reply-To: <1347614276.26071.15.camel@thorin>
On Friday 2012-09-14 11:17, Bernd Petrovitsch wrote:
>Shouldn't that have been
>---- snip ----
>#define base10len(i) ((const int[]){1,3,5,8,10,13,15,17,20}[sizeof(i)])
>---- snip ----
Yeah.
>A pure K&R-C version would use a string:
>#define base10len(i) "\0x1\0x3\0x5\0x8\0x0A\0x0D\0x0F\0x11\0x14"[sizeof(i)]
>(if I converted them properly into hexadecimal)
The syntax is \x01\x03\x05...
>and that gives a "char"
>which is happily promoted to whatever one needs in that place.
So just convert it; there are no less than two ways to do so
((const unsigned char *)"\x01\x03...")[sizeof(i)]
(boatfloating_t)("\x01\x03..."[sizeof(i)])
next prev parent reply other threads:[~2012-09-14 12:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-21 21:29 [PATCH] strings: helper for maximum decimal encoding of an unsigned integer J. Bruce Fields
2012-08-21 21:22 ` Jim Rees
2012-08-21 22:06 ` Al Viro
2012-08-21 22:19 ` J. Bruce Fields
2012-08-22 0:03 ` Jim Rees
2012-09-10 6:19 ` Jan Engelhardt
2012-09-14 9:17 ` Bernd Petrovitsch
2012-09-14 12:30 ` Jim Rees
2012-09-14 13:14 ` J. Bruce Fields
2012-09-14 13:18 ` Bernd Petrovitsch
2012-09-14 13:51 ` Jim Rees
2012-09-14 13:37 ` Jan Engelhardt
2012-09-14 13:54 ` Jim Rees
2012-09-14 12:59 ` Jan Engelhardt [this message]
2012-09-14 13:46 ` Jim Rees
2012-09-14 14:25 ` Jan Engelhardt
2012-09-14 15:00 ` Bernd Petrovitsch
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