A counter stores start and end times, and implements Display
to either show the time passed since start, or until end,
formatted as HH(+):MM:SS.
The timer will not go down past 00:00:00.
Basic functionality is very simple: ```rust let now = TimeStamp::now(); let mut counter = Counter::down( Some(now - 600), Some(now + 600) );
// A small amount of time will have passed since now was assigned
asserteq!(counter.tostring(), "00:09:59");
counter.flip();
// It now counts up from start
asserteq!(counter.tostring(), "00:10:00")
Both `start` and `end` times are adjustable:
rust
let mut counter = Counter::up(Some(TimeStamp::now()), None);
counter.trymovestart(-30).unwrap();
asserteq!(counter.tostring(), "00:00:30") ```
The full documentation is available here on docs.rs!
The primary motivation for the creation of this library is the concept of a marathon livestream, where the stream begins with a timer set to e.g. 4 hours at the beginning, and viewers can increase this time by paying.