[Xapian-discuss] Databases on Windows

[Olly Betts]

On Sun, Apr 13, 2008 at 10:29:18AM +0100, James Aylett wrote:
> On Sun, Apr 13, 2008 at 08:32:50AM +0100, Colin Bell wrote:
> > >>[db directory created] "ÍÍÍÍresearch"
> > >>and then exits without any errors.
[...]
> 
> Hmm. Unless anyone has any other suggestions, I think you're probably
> gonna have to attack the VC++ debugger to that and step through to
> find out where it fails, and possibly gain some insight as to where it
> gets the directory name wrong. I don't know if the library build
> you're using has debugging symbols, but if not you'll probably want to
> rebuild it.

I wonder if it's screwing up and passing mkdir() the address of the
std::string object cast to (char*) rather than calling c_str() on it, or
something like that.  But surely that would have been noticed before?

I believe MSVC uses what's known as the "short string optimisation", so
"research" would get stored in the string object, rather than the object
holding a pointer to it.  The four garbage characters would be the
string length.

It's hard to know quite where this would be going wrong.  Perhaps MSVC
doesn't always correctly handle overloading where one form is extern
"C"?

Hmm, or perhaps it's an issue with the SSO.  What happens if you name
the directory something longer?  If a much longer name works, see what
length it stops working at.

Cheers,
    Olly