Subj : Doing something wrong creating strings for JS function calls
To   : netscape.public.mozilla.jseng
From : Brook Monroe
Date : Tue Nov 23 2004 06:02 pm

I wrote a general purpose class to wrap SpiderMonkey, with a 
semi-general-purpose call to access functions written in scripts.  One 
of the things it must to is handle calls in a varargs format, for which 
some variation on the following snippets is used:

union vartype {
	char		ch[2];
	char		*string;
	int		n;
	unsigned int	u;
};
..
..
..
JSString *jStr;
..
..
..
var.string	= va_arg(ap,char *);
jStr		= JS_NewString(cx,var.string,strlen(var.string));
params[i]	= STRING_TO_JSVAL(jStr);

The app crashes when I destruct the class instance, inside 
js32.dll:js_PurgeDeflatedStringCache().  Clearly, the strings I'm 
creating aren't done quite correctly...the arguments get where they need 
to go, but get tidied up too soon.

How should I be going about this?

jbm!

.