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54 lines
961 B
54 lines
961 B
package kcp
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type ReceivingWindow struct {
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start uint32
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size uint32
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list []*Segment
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}
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func NewReceivingWindow(size uint32) *ReceivingWindow {
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return &ReceivingWindow{
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start: 0,
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size: size,
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list: make([]*Segment, size),
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}
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}
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func (this *ReceivingWindow) Size() uint32 {
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return this.size
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}
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func (this *ReceivingWindow) Position(idx uint32) uint32 {
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return (idx + this.start) % this.size
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}
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func (this *ReceivingWindow) Set(idx uint32, value *Segment) bool {
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pos := this.Position(idx)
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if this.list[pos] != nil {
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return false
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}
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this.list[pos] = value
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return true
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}
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func (this *ReceivingWindow) Remove(idx uint32) *Segment {
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pos := this.Position(idx)
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if this.list[pos] == nil {
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return nil
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}
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e := this.list[pos]
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this.list[pos] = nil
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return e
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}
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func (this *ReceivingWindow) RemoveFirst() *Segment {
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return this.Remove(0)
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}
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func (this *ReceivingWindow) Advance() {
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this.start++
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if this.start == this.size {
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this.start = 0
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}
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}
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