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/* public domain rewrite of hypot */
#include "ruby/missing.h"
#include <math.h>
double hypot(double x, double y)
{
if (x < 0) x = -x;
if (y < 0) y = -y;
if (x < y) {
double tmp = x;
x = y; y = tmp;
}
if (y == 0.0) return x;
y /= x;
return x * sqrt(1.0+y*y);
}
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