On Thu, Nov 12, 2009 at 05:06:20PM +0100, [email protected] scratched on the
wall:
> int MyClass::xCompare (void* v, int iLen1, const void* str1, int
> iLen2, const void* str2)
> {
> and I registered it:
> sqlite3_create_collation(mpDB,?MYCOLLATE", SQLITE_UTF8, NULL,
> MyClass::xCompare);
You can't do that.
C++ puts a silent "this" pointer in as the first argument, so you
cannot use a non-static class method as a callback.
You must create a static method, like this:
static int MyClass:xCompareCallback( void *v,
int iLen1, const void *str1, int iLen2, const void* str2)
{
MyClass *ptr = v;
return v->xCompare(NULL, iLen1, str1, iLen2, str2);
}
And register like this:
sqlite3_create_collation(mpDB, "MYCOLLATE", SQLITE_UTF8,
PtrToClassInstance, MyClass::xCompareCallback);
The "PtrToClassInstance" must be a pointer to the class instance you
want called. If you're registering this inside your C++ class, you
can use "this".
-j
--
Jay A. Kreibich < J A Y @ K R E I B I.C H >
"Our opponent is an alien starship packed with atomic bombs. We have
a protractor." "I'll go home and see if I can scrounge up a ruler
and a piece of string." --from Anathem by Neal Stephenson
_______________________________________________
sqlite-users mailing list
[email protected]
http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
