mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-23 20:57:29 +02:00
102 lines
2.1 KiB
Go
102 lines
2.1 KiB
Go
|
package roaring
|
||
|
|
||
|
import "container/heap"
|
||
|
|
||
|
/////////////
|
||
|
// The priorityQueue is used to keep Bitmaps sorted.
|
||
|
////////////
|
||
|
|
||
|
type item struct {
|
||
|
value *Bitmap
|
||
|
index int
|
||
|
}
|
||
|
|
||
|
type priorityQueue []*item
|
||
|
|
||
|
func (pq priorityQueue) Len() int { return len(pq) }
|
||
|
|
||
|
func (pq priorityQueue) Less(i, j int) bool {
|
||
|
return pq[i].value.GetSizeInBytes() < pq[j].value.GetSizeInBytes()
|
||
|
}
|
||
|
|
||
|
func (pq priorityQueue) Swap(i, j int) {
|
||
|
pq[i], pq[j] = pq[j], pq[i]
|
||
|
pq[i].index = i
|
||
|
pq[j].index = j
|
||
|
}
|
||
|
|
||
|
func (pq *priorityQueue) Push(x interface{}) {
|
||
|
n := len(*pq)
|
||
|
item := x.(*item)
|
||
|
item.index = n
|
||
|
*pq = append(*pq, item)
|
||
|
}
|
||
|
|
||
|
func (pq *priorityQueue) Pop() interface{} {
|
||
|
old := *pq
|
||
|
n := len(old)
|
||
|
item := old[n-1]
|
||
|
item.index = -1 // for safety
|
||
|
*pq = old[0 : n-1]
|
||
|
return item
|
||
|
}
|
||
|
|
||
|
func (pq *priorityQueue) update(item *item, value *Bitmap) {
|
||
|
item.value = value
|
||
|
heap.Fix(pq, item.index)
|
||
|
}
|
||
|
|
||
|
/////////////
|
||
|
// The containerPriorityQueue is used to keep the containers of various Bitmaps sorted.
|
||
|
////////////
|
||
|
|
||
|
type containeritem struct {
|
||
|
value *Bitmap
|
||
|
keyindex int
|
||
|
index int
|
||
|
}
|
||
|
|
||
|
type containerPriorityQueue []*containeritem
|
||
|
|
||
|
func (pq containerPriorityQueue) Len() int { return len(pq) }
|
||
|
|
||
|
func (pq containerPriorityQueue) Less(i, j int) bool {
|
||
|
k1 := pq[i].value.highlowcontainer.getKeyAtIndex(pq[i].keyindex)
|
||
|
k2 := pq[j].value.highlowcontainer.getKeyAtIndex(pq[j].keyindex)
|
||
|
if k1 != k2 {
|
||
|
return k1 < k2
|
||
|
}
|
||
|
c1 := pq[i].value.highlowcontainer.getContainerAtIndex(pq[i].keyindex)
|
||
|
c2 := pq[j].value.highlowcontainer.getContainerAtIndex(pq[j].keyindex)
|
||
|
|
||
|
return c1.getCardinality() > c2.getCardinality()
|
||
|
}
|
||
|
|
||
|
func (pq containerPriorityQueue) Swap(i, j int) {
|
||
|
pq[i], pq[j] = pq[j], pq[i]
|
||
|
pq[i].index = i
|
||
|
pq[j].index = j
|
||
|
}
|
||
|
|
||
|
func (pq *containerPriorityQueue) Push(x interface{}) {
|
||
|
n := len(*pq)
|
||
|
item := x.(*containeritem)
|
||
|
item.index = n
|
||
|
*pq = append(*pq, item)
|
||
|
}
|
||
|
|
||
|
func (pq *containerPriorityQueue) Pop() interface{} {
|
||
|
old := *pq
|
||
|
n := len(old)
|
||
|
item := old[n-1]
|
||
|
item.index = -1 // for safety
|
||
|
*pq = old[0 : n-1]
|
||
|
return item
|
||
|
}
|
||
|
|
||
|
//func (pq *containerPriorityQueue) update(item *containeritem, value *Bitmap, keyindex int) {
|
||
|
// item.value = value
|
||
|
// item.keyindex = keyindex
|
||
|
// heap.Fix(pq, item.index)
|
||
|
//}
|