cpython/Python/hypot.c

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/* hypot() replacement */
#include "config.h"
#include "myproto.h"
#include "mymath.h"
double hypot(double x, double y)
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{
double yx;
x = fabs(x);
y = fabs(y);
if (x < y) {
double temp = x;
x = y;
y = temp;
}
if (x == 0.)
return 0.;
else {
yx = y/x;
return x*sqrt(1.+yx*yx);
}
}