JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / runtime / WeakRandom.h

diff --git a/runtime/WeakRandom.h b/runtime/WeakRandom.h
index ff3995e80a95d973cbe93166c24981509c656f52..98b23c70d6a9c60a9e3568d5753fbb97383d9ce0 100644 (file)
--- a/runtime/WeakRandom.h
+++ b/runtime/WeakRandom.h
@@ -56,18 +56,26 @@
 namespace JSC {
 
 class WeakRandom {
+friend class JSGlobalObject; // For access to initializeSeed() during replay.
 public:
     WeakRandom(unsigned seed)
-        : m_low(seed ^ 0x49616E42)
-        , m_high(seed)
     {
+        initializeSeed(seed);
     }
+    
+    // Returns the seed provided that you've never called get() or getUint32().
+    unsigned seedUnsafe() const { return m_high; }
 
     double get()
     {
         return advance() / (UINT_MAX + 1.0);
     }
 
+    unsigned getUint32()
+    {
+        return advance();
+    }
+
 private:
     unsigned advance()
     {
@@ -77,6 +85,12 @@ private:
         return m_high;
     }
 
+    void initializeSeed(unsigned seed)
+    {
+        m_low = seed ^ 0x49616E42;
+        m_high = seed;
+    }
+
     unsigned m_low;
     unsigned m_high;
 };