Re: [xml] Creating Win32 wrapper function for exported variables

["Robert Collins" <robert collins itdomain com au>]

You can export variables if you use a .def file for the .dll.

There's no need for wrapper functions.

Rob

----- Original Message -----
From: "Vakoc, Mark" <Mark_Vakoc jdedwards com>
To: <xml gnome org>
Sent: Wednesday, July 18, 2001 2:19 AM
Subject: [xml] Creating Win32 wrapper function for exported variables


> In Win32 you can import only functions from a library (.DLL) and not
> variables.  This causes problems if libxml2 is built as a dll, and a
program
> attempts to use an exported variable.  It will compile/link, but will fail
> at runtime.
>
> I propose creating simple wrappers for global parsing variables.  A good
> example program is xsltproc, which has a line
>
> if (novalid == 0)
>   xmlLoadExtDtdDefaultValue = 6;
> else
>   xmlLoadExtDtdDefaultValue = 0;
>
> If xsltproc is linked against libxml2 as a .DLL (not as a .lib), this will
> cause a segv.
>
> I created a wrapper function in parserInternals so the code now looks like
>
> if (novalid == 0)
>   xmlSetLoadExtDtdDefaultValue(6);
> else
>   xmlSetLoadExtDtdDefaultValue(0);
>
> Extremely simple, but saves us win32 programmers some troubles. (I also
have
> a xmlGetLoadExtDtdDefaultValue wrapper).
>
> What do you think?
>
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