1 #include <lib9.h> 2 3 int 4 isNaN(double d) 5 { 6 return isnan(d); 7 } 8 9 int 10 isInf(double d, int sign) 11 { 12 if(sign < 0) 13 return isinf(d) < 0; 14 return isinf(d); 15 } 16