JSVAL_INT_POW2    100 extra_lib/include/js/jsapi.h #define JSVAL_INT_MIN           ((jsval)1 - JSVAL_INT_POW2(30))
JSVAL_INT_POW2    101 extra_lib/include/js/jsapi.h #define JSVAL_INT_MAX           (JSVAL_INT_POW2(30) - 1)
JSVAL_INT_POW2    205 extra_lib/include/js/jsapi.h #define JSVAL_VOID              INT_TO_JSVAL(0 - JSVAL_INT_POW2(30))