wehub-resource-sync
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
package codec
|
|
|
|
import (
|
|
"fmt"
|
|
)
|
|
|
|
// startEnd represents the start and end of some data. It mainly exists as a
|
|
// helper when referencing the values
|
|
type startEnd struct {
|
|
start int
|
|
end int
|
|
}
|
|
|
|
// sub subtracts the values of two startEnds
|
|
func (s startEnd) sub(o startEnd) startEnd {
|
|
return startEnd{
|
|
s.start - o.start,
|
|
s.end - o.end,
|
|
}
|
|
}
|
|
|
|
// add adds the values of two startEnds
|
|
func (s startEnd) add(o startEnd) startEnd {
|
|
return startEnd{
|
|
s.start + o.start,
|
|
s.end + o.end,
|
|
}
|
|
}
|
|
|
|
// overlaps returns true if two startEnds overlap
|
|
func (s startEnd) overlaps(o startEnd) bool {
|
|
return o.start <= s.end && o.end >= s.start
|
|
}
|
|
|
|
// contains returns true if the other is fully contained within this one
|
|
func (s startEnd) contains(o startEnd) bool {
|
|
return s.start <= o.start && o.end <= s.end
|
|
}
|
|
|
|
// overflow returns a startEnd that tells how much the other goes outside the
|
|
// bounds of this one
|
|
func (s startEnd) overflow(o startEnd) startEnd {
|
|
return s.merge(o).sub(s)
|
|
}
|
|
|
|
// merge takes two start/ends and returns a single one that encompasses both
|
|
func (s startEnd) merge(o startEnd) startEnd {
|
|
return startEnd{
|
|
min(s.start, o.start),
|
|
max(s.end, o.end),
|
|
}
|
|
}
|
|
|
|
// String returns a string representation for clearer debugging
|
|
func (s startEnd) String() string {
|
|
return fmt.Sprintf("[%d,%d]", s.start, s.end)
|
|
}
|