TUN-528: Move cloudflared into a separate repo

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

@@ -0,0 +1,52 @@
+package grid
+
+import (
+	. "github.com/badgerodon/collections"
+)
+
+type (
+	Grid struct {
+		values     []interface{}
+		cols, rows int
+	}
+)
+
+func New(cols, rows int) *Grid {
+	return &Grid{
+		values: make([]interface{}, cols*rows),
+		cols:   cols,
+		rows:   rows,
+	}
+}
+
+func (this *Grid) Do(f func(p Point, value interface{})) {
+	for x := 0; x < this.cols; x++ {
+		for y := 0; y < this.rows; y++ {
+			f(Point{x, y}, this.values[x*this.cols+y])
+		}
+	}
+}
+
+func (this *Grid) Get(p Point) interface{} {
+	if p.X < 0 || p.Y < 0 || p.X >= this.cols || p.Y >= this.rows {
+		return nil
+	}
+	v, _ := this.values[p.X*this.cols+p.Y]
+	return v
+}
+
+func (this *Grid) Rows() int {
+	return this.rows
+}
+
+func (this *Grid) Cols() int {
+	return this.cols
+}
+
+func (this *Grid) Len() int {
+	return this.rows * this.cols
+}
+
+func (this *Grid) Set(p Point, v interface{}) {
+
+}