In libxslt, there is a structure called _xsltDebuggerCallbacks which
is part of the API for xsltSetDebuggerCallbacks(). But the structure
is in a C file (xsltutils.c), so the argument to xsltSetDebuggerCallbacks
is void *. The members of the structure are specific functions
that have to match prototypes defined in xslutils.h.
I'm confused about why _xsltDebuggerCallbacks isn't public and the
argument to xsltSetDebuggerCallbacks isn't strongly typed. Can
someone clue me in? Is this some sort of forward compatibility
trade off?
I guess if the caller is passing in a structure and the sizeof the
structure changes, you've lost API compatibility, and perhaps having
an allocator/deallocator in the API isn't worthwhile. But the
current void array scheme has a significant "ick" factor.
Can the caller just pass in the size of the structure, like:
xsltSetDebuggerCallbacks(&mine, sizeof mine));
If the struct changes, the size will differ and the call can fail,
similar to the "(no != XSLT_CALLBACK_NUMBER)" test that's currently
there.
Thanks,
Phil
_______________________________________________
xslt mailing list, project page http://xmlsoft.org/XSLT/
[email protected]
http://mail.gnome.org/mailman/listinfo/xslt
