// Calculate norm2(X).
func dnrm2(N int, X []float64, incX int) float64 {
var val C.double
val = C.dnrm2_((*C.int)(unsafe.Pointer(&N)),
(*C.double)(unsafe.Pointer(&X[0])),
(*C.int)(unsafe.Pointer(&incX)))
return float64(val)
}
// extern double dnrm2_(int *n, double *x, int *incx);
func Dnrm2(n int, x []float64, incX int) float64 {
r := C.dnrm2_(
(*C.int)(unsafe.Pointer(&n)),
array64(x),
(*C.int)(unsafe.Pointer(&incX)),
)
return float64(r)
}