added hxd.impl.BitSet

hxd/impl/BitSet.hx

@@ -0,0 +1,34 @@
+package hxd.impl;
+
+abstract BitSet(haxe.io.Bytes) {
+
+	public function new(count:Int) {
+		this = haxe.io.Bytes.alloc((count + 7) >> 3);
+	}
+
+	public function get(index:Int) {
+		return this.get(index>>3) & (1 << (index&7)) != 0;
+	}
+
+	public function set(index:Int) {
+		var p = index >> 3;
+		this.set(p, this.get(p) | (1 << (index&7)));
+	}
+
+	public function unset(index:Int) {
+		var p = index >> 3;
+		this.set(p, this.get(p) & ~(1 << (index&7)));
+	}
+
+	public function toggle(index:Int, b : Bool) {
+		var p = index >> 3;
+		var v = this.get(p);
+		var mask = 1 << (index&7);
+		this.set(p, b ? v | mask : v & ~mask);
+	}
+
+	public function clear(b=false) {
+		this.fill(0,this.length,b?0xFF:0);
+	}
+
+}