VP_SIGN_NaN      1952 ext/bigdecimal/bigdecimal.c     rb_define_const(rb_cBigDecimal, "SIGN_NaN",INT2FIX(VP_SIGN_NaN));
VP_SIGN_NaN       198 ext/bigdecimal/bigdecimal.h #define VpIsNaN(a)      ((a)->sign==VP_SIGN_NaN)
VP_SIGN_NaN       199 ext/bigdecimal/bigdecimal.h #define VpSetNaN(a)     ((a)->frac[0]=0,(a)->Prec=1,(a)->sign=VP_SIGN_NaN)