func Write()

in patches/gopsutil/internal/common/binary.go [230:335]
103 lines of code
35 McCabe index (conditional complexity)

func Write(w io.Writer, order ByteOrder, data interface{}) error {
	// Fast path for basic types and slices.
	if n := intDataSize(data); n != 0 {
		var b [8]byte
		var bs []byte
		if n > len(b) {
			bs = make([]byte, n)
		} else {
			bs = b[:n]
		}
		switch v := data.(type) {
		case *int8:
			bs = b[:1]
			b[0] = byte(*v)
		case int8:
			bs = b[:1]
			b[0] = byte(v)
		case []int8:
			for i, x := range v {
				bs[i] = byte(x)
			}
		case *uint8:
			bs = b[:1]
			b[0] = *v
		case uint8:
			bs = b[:1]
			b[0] = byte(v)
		case []uint8:
			bs = v
		case *int16:
			bs = b[:2]
			order.PutUint16(bs, uint16(*v))
		case int16:
			bs = b[:2]
			order.PutUint16(bs, uint16(v))
		case []int16:
			for i, x := range v {
				order.PutUint16(bs[2*i:], uint16(x))
			}
		case *uint16:
			bs = b[:2]
			order.PutUint16(bs, *v)
		case uint16:
			bs = b[:2]
			order.PutUint16(bs, v)
		case []uint16:
			for i, x := range v {
				order.PutUint16(bs[2*i:], x)
			}
		case *int32:
			bs = b[:4]
			order.PutUint32(bs, uint32(*v))
		case int32:
			bs = b[:4]
			order.PutUint32(bs, uint32(v))
		case []int32:
			for i, x := range v {
				order.PutUint32(bs[4*i:], uint32(x))
			}
		case *uint32:
			bs = b[:4]
			order.PutUint32(bs, *v)
		case uint32:
			bs = b[:4]
			order.PutUint32(bs, v)
		case []uint32:
			for i, x := range v {
				order.PutUint32(bs[4*i:], x)
			}
		case *int64:
			bs = b[:8]
			order.PutUint64(bs, uint64(*v))
		case int64:
			bs = b[:8]
			order.PutUint64(bs, uint64(v))
		case []int64:
			for i, x := range v {
				order.PutUint64(bs[8*i:], uint64(x))
			}
		case *uint64:
			bs = b[:8]
			order.PutUint64(bs, *v)
		case uint64:
			bs = b[:8]
			order.PutUint64(bs, v)
		case []uint64:
			for i, x := range v {
				order.PutUint64(bs[8*i:], x)
			}
		}
		_, err := w.Write(bs)
		return err
	}

	// Fallback to reflect-based encoding.
	v := reflect.Indirect(reflect.ValueOf(data))
	size := dataSize(v)
	if size < 0 {
		return errors.New("binary.Write: invalid type " + reflect.TypeOf(data).String())
	}
	buf := make([]byte, size)
	e := &encoder{order: order, buf: buf}
	e.value(v)
	_, err := w.Write(buf)
	return err
}