Is the DECIMAL variant type too long ?
Francois Gouget
fgouget at free.fr
Wed May 9 19:53:03 CDT 2001
On Thu, 10 May 2001, gerard patel wrote:
[...]
> Could the DECIMAL type be a pointer to the real data ??
No. The problem is the tagVARIANT type:
sizeof(DECIMAL) -> 16 in Windows, 16 in Wine
sizeof(VARIANT) -> 16 in Windows, 24 in Wine
Oups, that's where the problem is. In Windows DECIMAL is not at the
same level as the other fields. It's part of an englobing union: you
basically have:
union {
struct {
VARTYPE vt;
WORD wReserved1;
WORD wReserved2;
WORD wReserved3;
union {
lots of fields...
}
}
DECIMAL decVal;
}
In Wine decVal is with the other variant fields so the total size of
VARIANT is 2+2+2+2+16 -> 24
Temporary fix: comment out decVal.
Correct fix: add the global union and update lots of places in Wine
to match. Plus on Windows, just for VARIANT, they use n1, n2, n3 as the
dummy union/struct names.
Hmm... this must be breaking lots of things, sending the quick fix to
wine-patches.
Any volunteer for the right fix?
--
Francois Gouget fgouget at free.fr http://fgouget.free.fr/
Advice is what we ask for when we already know the answer but wish we didn't
-- Eric Jong
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