TUN-528: Move cloudflared into a separate repo

vendor/github.com/golang-collections/collections/set/set.go

@@ -0,0 +1,106 @@
+package set
+
+type (
+	Set struct {
+		hash map[interface{}]nothing
+	}
+
+	nothing struct{}
+)
+
+// Create a new set
+func New(initial ...interface{}) *Set {
+	s := &Set{make(map[interface{}]nothing)}
+
+	for _, v := range initial {
+		s.Insert(v)
+	}
+
+	return s
+}
+
+// Find the difference between two sets
+func (this *Set) Difference(set *Set) *Set {
+	n := make(map[interface{}]nothing)
+
+	for k, _ := range this.hash {
+		if _, exists := set.hash[k]; !exists {
+			n[k] = nothing{}
+		}
+	}
+
+	return &Set{n}
+}
+
+// Call f for each item in the set
+func (this *Set) Do(f func(interface{})) {
+	for k, _ := range this.hash {
+		f(k)
+	}
+}
+
+// Test to see whether or not the element is in the set
+func (this *Set) Has(element interface{}) bool {
+	_, exists := this.hash[element]
+	return exists
+}
+
+// Add an element to the set
+func (this *Set) Insert(element interface{}) {
+	this.hash[element] = nothing{}
+}
+
+// Find the intersection of two sets
+func (this *Set) Intersection(set *Set) *Set {
+	n := make(map[interface{}]nothing)
+
+	for k, _ := range this.hash {
+		if _, exists := set.hash[k]; exists {
+			n[k] = nothing{}
+		}
+	}
+
+	return &Set{n}
+}
+
+// Return the number of items in the set
+func (this *Set) Len() int {
+	return len(this.hash)
+}
+
+// Test whether or not this set is a proper subset of "set"
+func (this *Set) ProperSubsetOf(set *Set) bool {
+	return this.SubsetOf(set) && this.Len() < set.Len()
+}
+
+// Remove an element from the set
+func (this *Set) Remove(element interface{}) {
+	delete(this.hash, element)
+}
+
+// Test whether or not this set is a subset of "set"
+func (this *Set) SubsetOf(set *Set) bool {
+	if this.Len() > set.Len() {
+		return false
+	}
+	for k, _ := range this.hash {
+		if _, exists := set.hash[k]; !exists {
+			return false
+		}
+	}
+	return true
+}
+
+// Find the union of two sets
+func (this *Set) Union(set *Set) *Set {
+	n := make(map[interface{}]nothing)
+
+	for k, _ := range this.hash {
+		n[k] = nothing{}
+	}
+	for k, _ := range set.hash {
+		n[k] = nothing{}
+	}
+
+	return &Set{n}
+}