56 lines
884 B
Go
56 lines
884 B
Go
package jsonpath
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type Results struct {
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nodes []*Result
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head int
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tail int
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count int
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}
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func newResults() *Results {
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return &Results{
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nodes: make([]*Result, 3, 3),
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}
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}
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func (q *Results) push(n *Result) {
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if q.head == q.tail && q.count > 0 {
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nodes := make([]*Result, len(q.nodes)*2)
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copy(nodes, q.nodes[q.head:])
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copy(nodes[len(q.nodes)-q.head:], q.nodes[:q.head])
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q.head = 0
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q.tail = len(q.nodes)
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q.nodes = nodes
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}
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q.nodes[q.tail] = n
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q.tail = (q.tail + 1) % len(q.nodes)
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q.count++
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}
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func (q *Results) Pop() *Result {
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if q.count == 0 {
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return nil
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}
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node := q.nodes[q.head]
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q.head = (q.head + 1) % len(q.nodes)
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q.count--
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return node
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}
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func (q *Results) Peek() *Result {
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if q.count == 0 {
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return nil
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}
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return q.nodes[q.head]
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}
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func (q *Results) len() int {
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return q.count
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}
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func (q *Results) clear() {
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q.head = 0
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q.count = 0
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q.tail = 0
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}
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