| John Park | 33858a3 | 2018-09-28 23:05:48 -0700 | [diff] [blame] | 1 | #include "aos/util/wrapping_counter.h" |
| Brian Silverman | 2f59450 | 2013-10-16 10:29:47 -0700 | [diff] [blame] | 2 | |
| 3 | namespace aos { |
| 4 | namespace util { |
| 5 | |
| 6 | WrappingCounter::WrappingCounter(int32_t initial_count) |
| 7 | : count_(initial_count), last_count_(0) {} |
| 8 | |
| 9 | int32_t WrappingCounter::Update(uint8_t current) { |
| 10 | if (last_count_ > current) { |
| 11 | count_ += 0x100; |
| 12 | } |
| 13 | count_ = (count_ & 0xffffff00) | current; |
| 14 | last_count_ = current; |
| 15 | return count_; |
| 16 | } |
| 17 | |
| 18 | } // namespace util |
| 19 | } // namespace aos |