package main

type ringbuffer struct {
  data  []float32
  idx   int
}

func newRingbuffer() ringbuffer {
  return ringbuffer {
    data: make([]float32, 5),
    idx: 0,
  }
}

func (rb *ringbuffer) AddValue(value float32) {
  rb.data[rb.idx] = value;
  rb.idx = (rb.idx + 1) % len(rb.data)
}

func (rb *ringbuffer) MaxMinDiff() float32 {
  min := rb.data[0]
  max := rb.data[0]

  for _, val := range rb.data {
    if val < min {
      min = val
    }
    if val > max {
      max = val
    }
  }

  return max - min
}