Update Files

Kha/Sources/kha/audio2/ogg/tools/Crc32.hx

@@ -0,0 +1,32 @@
+package kha.audio2.ogg.tools;
+import haxe.ds.Vector;
+
+/**
+ * ...
+ * @author shohei909
+ */
+class Crc32
+{
+    static inline var POLY:UInt = 0x04c11db7;
+    static var table:Vector<UInt>;
+
+    public static function init() {
+        if (table != null) {
+            return;
+        }
+        
+        table = new Vector(256);
+        for (i in 0...256) {
+            var s:UInt = ((i:UInt) << (24:UInt));
+            for (j in 0...8) {
+                s = (s << 1) ^ (s >= ((1:UInt) << 31) ? POLY : 0);
+            }
+            table[i] = s;
+        }
+    }
+
+    public static inline function update(crc:UInt, byte:UInt):UInt
+    {
+        return (crc << 8) ^ table[byte ^ (crc >>> 24)];
+    }
+}