Date: Tue, 10 Feb 2004 18:06:12 -0500 From: Marc Ramirez <marc.ramirez@bluecirclesoft.com> To: Jeremy Faulkner <gldisater@gldis.ca> Cc: freebsd-chat@freebsd.org Subject: Re: Could use some help with variable length argument lists Message-ID: <20040210230611.GB39506@www.bluecirclesoft.com> In-Reply-To: <402940EC.2030403@gldis.ca> References: <40293B38.30401@potentialtech.com> <402940EC.2030403@gldis.ca>
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On Tue, Feb 10, 2004 at 03:37:00PM -0500, Jeremy Faulkner wrote:
>=20
>=20
> va_start says that the last required variable is "message".
>=20
> You can't use ap because it's not in the list of variables when you=20
> called the function.
ap doesn't represent a parameter, it represents the list. C/C++ have
no way of knowing how many parameters were passed in. The information
in "message" tells the function how many parameters are in the list.
> _log(1, "Log test");
> ^ There's nothing there to be "ap"
>=20
> So it "Segmentation fault (core dumped)"'s
>=20
> _log(1, "Log test", NULL);
If that were true, then
printf("Hello, world!");
could never work.
Marc.
> --=20
> Jeremy Faulkner http://www.gldis.ca
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> http://lists.freebsd.org/mailman/listinfo/freebsd-chat
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--=20
Marc Ramirez
Blue Circle Software Corporation
513-688-1070 (main)
513-382-1270 (direct)
http://www.bluecirclesoft.com
http://www.mrami.com (personal)
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