private TimeOffsets(List <Entry> entries)
{
this.entries = entries;
var baseOffset = entries[entries.Count - 1].offset;
// generate optimized offset getters for typical cases
// fallback to generic getter for other cases
if (entries.Count == 1) // base offset only
{
offsetGetter = dateTime => baseOffset;
}
else if (entries.Count == 2) // one offset
{
var offset1 = entries[0];
offsetGetter = dateTime => dateTime < offset1.at ? baseOffset : offset1.offset;
}
else
{
// generic getter
offsetGetter = dateTime =>
entries[ListUtils.BinarySearch(entries, 0, entries.Count, e => e.at > dateTime)].offset;
}
}
int ITimeGaps.BinarySearch(int begin, int end, Predicate <TimeGap> lessThanValueBeingSearched)
{
return(ListUtils.BinarySearch(items, begin, end, lessThanValueBeingSearched));
}