Re: freopen question
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- Subject: Re: freopen question
- From: Brett Nash <nash@...>
- Date: 2008年2月06日 15:21:22 +1100
On Sat, 2008年02月02日 at 12:20 +0000, Terisquas Brothers wrote:
> I'm trying to make LUA work in a platform where I have
> no freopen.
>
> I think there's just one appearance of freopen in the
> code, in luaL_loadfile. Is it safe to modify it from
>
> lf.f = freopen(filename, "rb", lf.f); /* reopen
> in binary mode */
>
> to
>
> if (lf.f!=NULL) fclose (lf.f);
> lf.f=fopen (filename,"rb");
>
> ?
>
>
> Is that a correct equivalence? (the truth is I've
> never seen freopen until now...)
If nothing goes wrong you are fine.
To handle rare errors, something more like:
if (lf.f){
if (fclose(lf.f) == EOF){
/* Bail out here, it's all bad */
}
}
lf.f = fopen(filename,"rb");
BTW: freopen is part of C89, so I'd be double checking platforms that
don't implement it.
Regards,
nash
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