Date: Wed, 22 Dec 2004 12:38:44 +0200 From: Peter Pentchev <roam@ringlet.net> To: Peter Jeremy <PeterJeremy@optushome.com.au> Cc: FreeBSD Architecture Mailing List <arch@freebsd.org> Subject: Re: Header files with enums instead of defines? Message-ID: <20041222103844.GI801@straylight.m.ringlet.net> In-Reply-To: <20041222090855.GO79646@cirb503493.alcatel.com.au> References: <20041222010143.GS53357@wantadilla.lemis.com> <20041222090855.GO79646@cirb503493.alcatel.com.au>
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--hABqaeELJqnDDeDE Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Dec 22, 2004 at 08:08:55PM +1100, Peter Jeremy wrote: > On Wed, 2004-Dec-22 11:31:43 +1030, Greg 'groggy' Lehey wrote: > >Has anybody thought about replacing #defines with enums in header > >files? It would make debugging a whole lot easier. Foe example, I'm > >currently looking at a debug printout which contains: > > > > xerrno =3D 17,=20 > ... > > xerrno =3D EEXIST,=20 >=20 > K&R2 states that errno is an "integer expression" and that the error > values are "macros". I suspect POSIX and newer C standards say something > similar. The Single Unix Specification goes to great pains to repeat over and over again that the error codes are 'symbolic constants', which IMHO may be taken to mean either a #define'd macro or an enum value. I, too, went to check with more than half a hunch that it would mandate that the error codes be macros, but it turned out it doesn't :) Still, all the other objections about enums not really being ints are quite valid :) G'luck, Peter --=20 Peter Pentchev roam@ringlet.net roam@cnsys.bg roam@FreeBSD.org PGP key: http://people.FreeBSD.org/~roam/roam.key.asc Key fingerprint FDBA FD79 C26F 3C51 C95E DF9E ED18 B68D 1619 4553 If you think this sentence is confusing, then change one pig. --hABqaeELJqnDDeDE Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQFByU607Ri2jRYZRVMRAm9tAJ9U3h/IdMYLWhA2M9Uc5uKe0v4atQCfaRYn 4auVXtjQTYzr2FswtmUTkAk= =8Xtm -----END PGP SIGNATURE----- --hABqaeELJqnDDeDE--
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