Add a method to get the contents of an XArray so we can index in

it really fast, or iterate over it.  This is dangerous and breaks
the nice abstraction (sigh).



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11122

include/pub_tool_xarray.h

@@ -125,6 +125,16 @@ extern void VG_(dropHeadXA) ( XArray*, Word );
    is NULL, in which case the parent's cost-center is used. */
 extern XArray* VG_(cloneXA)( HChar* cc, XArray* xa );
 
+/* Get the raw array and size so callers can index it really fast.
+   This is dangerous in the sense that there's no range or
+   anything-else checking.  It's also dangerous in that if
+   VG_(addToXA) is used, the contents may be re-located without
+   warning, hence making the contents address returned here
+   invalid. */
+extern void VG_(getContentsXA_UNSAFE)( XArray* sr,
+                                       /*OUT*/void** ctsP,
+                                       /*OUT*/Word*  usedP );
+
 /* Convenience function: printf into an XArray of HChar, adding stuff
    at the end.  This is very convenient for concocting arbitrary
    length printf output in an XArray.  Note that the resulting string