e.enc = enc
	} else {
		enc.freeList = e.next
	}
	e.sendZero = false
	e.fieldnum = 0
	e.b = b
	if len(b.data) == 0 {
		b.data = b.scratch[0:0]
	}
	return e
}

func (enc *Encoder) freeEncoderState(e *encoderState) {
	e.next = enc.freeList
	enc.freeList = e
}

// Unsigned integers have a two-state encoding. If the number is less
// than 128 (0 through 0x7F), its value is written directly.