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- #include <math.h>
-
- static double xhypot (const double x, const double y);
-
- static double xhypot (const double x, const double y)
- {
- double xabs = fabs(x) ;
- double yabs = fabs(y) ;
- double min, max;
-
- if (xabs < yabs) {
- min = xabs ;
- max = yabs ;
- } else {
- min = yabs ;
- max = xabs ;
- }
-
- if (min == 0)
- {
- return max ;
- }
-
- {
- double u = min / max ;
- return max * sqrt (1 + u * u) ;
- }
- }
-