// beyond the stack guard.
	StackSmall = 128

	// Functions that need frames <= StackBig can assume that neither
	// SP-framesize nor stackGuard-StackSmall will underflow, and thus use a
	// more efficient check. In order to ensure this, StackBig must be <= the
	// size of the unmapped space at zero.
	StackBig = 4096

	case IsInf(frac, 0) || IsNaN(frac):
		return frac
	}
	frac, e := normalize(frac)
	exp += e
	x := Float64bits(frac)
	exp += int(x>>shift)&mask - bias
	if exp < -1075 {
		return Copysign(0, frac) // underflow
	}
	if exp > 1023 { // overflow
		if frac < 0 {
			return Inf(-1)
		}
		return Inf(1)
	}
	var m float64 = 1
	if exp < -1022 { // denormal
		exp += 53
		m = 1.0 / (1 << 53) // 2**-53
	}

          // Not enough room in output buffer--drain it, creating a bigger buffer if necessary.
          startDraining(true);
          continue DRAINING;
        } else if (result.isUnderflow()) {
          // If encoder underflows, it means either:
          // a) the final flush() succeeded; next drain (then done)
          // b) we encoded all of the input; next flush
          // c) we ran of out input to encode; next read more input

          // Not enough room in output buffer--drain it, creating a bigger buffer if necessary.
          startDraining(true);
          continue DRAINING;
        } else if (result.isUnderflow()) {
          // If encoder underflows, it means either:
          // a) the final flush() succeeded; next drain (then done)
          // b) we encoded all of the input; next flush
          // c) we ran of out input to encode; next read more input

func (x ratVal) String() string   { return rtof(x).String() }

func (x floatVal) String() string {
	f := x.val

	// Use exact fmt formatting if in float64 range (common case):
	// proceed if f doesn't underflow to 0 or overflow to inf.
	if x, _ := f.Float64(); f.Sign() == 0 == (x == 0) && !math.IsInf(x, 0) {
		return fmt.Sprintf("%.6g", x)
	}

	return "OOPS"
}

}

type Try[T any] struct {
	v   *T
	err error
}

func (r Try[T]) IsSuccess() bool {
	return r.v != nil
}

type ByteBuffer struct {
	pos       int
	buf       []byte
	underflow error
}

// InboundHandler is extends of uclient.NetInboundHandler
type InboundHandler interface {
	OriginHost() string
	OriginRealm() string
}

type transactionID struct {
	hopID uint32
	endID uint32

			fields: fields{
				value: []byte("9223372036854775808"),
			},
			// Seems to be what strconv.ParseInt returns
			want:   math.MaxInt64,
			wantOK: false,
		},
		{
			name: "min-underflow",
			fields: fields{
				value: []byte("-9223372036854775809"),
			},
			// Seems to be what strconv.ParseInt returns
			want:   math.MinInt64,
			wantOK: false,
		},
		{
			name: "zerospace",

	}
	return true
}

// Sub removes the value of b from the current amount, or returns false if underflow would result.
func (a *int64Amount) Sub(b int64Amount) bool {
	return a.Add(int64Amount{value: -b.value, scale: b.scale})
}

// Mul multiplies the provided b to the current amount, or
// returns false if overflow or underflow would result.
func (a *int64Amount) Mul(b int64) bool {
	switch {
	case a.value == 0:

			return complex(r, -r)
		}
		r := math.Sqrt(0.5 * imag(x))
		return complex(r, r)
	}
	a := real(x)
	b := imag(x)
	var scale float64
	// Rescale to avoid internal overflow or underflow.
	if math.Abs(a) > 4 || math.Abs(b) > 4 {
		a *= 0.25
		b *= 0.25
		scale = 2
	} else {
		a *= 1.8014398509481984e16 // 2**54
		b *= 1.8014398509481984e16
		scale = 7.450580596923828125e-9 // 2**-27
	}

//
// x and m operands must have the same announced length.
func (x *Nat) maybeSubtractModulus(always choice, m *Modulus) {
	t := NewNat().set(x)
	underflow := t.sub(m.nat)
	// We keep the result if x - m didn't underflow (meaning x >= m)
	// or if always was set.
	keep := not(choice(underflow)) | choice(always)
	x.assign(keep, t)
}

// Sub computes x = x - y mod m.
//