Date: Fri, 13 Dec 2002 16:41:06 +0300 From: "Andrey A. Chernov" <ache@nagual.pp.ru> To: Ruslan Ermilov <ru@FreeBSD.ORG> Cc: bwk@bell-labs.com, obrien@FreeBSD.ORG, current@FreeBSD.ORG Subject: Re: New AWK bug with collating Message-ID: <20021213134106.GA32832@nagual.pp.ru> In-Reply-To: <20021213123240.GC86638@sunbay.com> References: <20021213122654.GA32014@nagual.pp.ru> <20021213123240.GC86638@sunbay.com>
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--k+w/mQv8wyuph6w0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Dec 13, 2002 at 14:32:40 +0200, Ruslan Ermilov wrote: > Pardon my ignorance here, but the following fragment > returns -1, doesn't it? >=20 > #include <stdio.h> > void > main(void) > { > int i; >=20 > i =3D (unsigned char)1 - (unsigned char)2; > printf("%d\n", i); > } It very depends on compiler, i.e. does it implements "value preseving" or= =20 "unsigned preserving" for 'char' type conversions. Or ANSI C vs. common C= =20 mode. Better be safe for both. Read 6.10.1.1 section here: http://wwwrsphysse.anu.edu.au/doc/DUhelp/AQTLTBTE/DOCU_067.HTM --=20 Andrey A. Chernov http://ache.pp.ru/ --k+w/mQv8wyuph6w0 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (FreeBSD) iQCVAwUBPfnjcuJgpPLZnQjrAQEc6wQAp+LJQJ7DRaMRGdhg5GrpPUQg3IJf2nO2 LYV+/H4pPRkMcmTXPu7DjNaXvEDYkKYmlzyXkzVvYYTeItqDoxVmDRncpFAY7xwm S291En345DnHlKVIOl7Ek3UQQxhGFsqFVyI/U2/cppCKU6WgmWnAPTvY6BUYhNGZ CzVq6Dn0dAM= =/J58 -----END PGP SIGNATURE----- --k+w/mQv8wyuph6w0-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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