From 1bf1084f2b10c3b47fd1a588d85d21ed0eb41d0c Mon Sep 17 00:00:00 2001
From: Lorry Tar Creator <lorry-tar-importer@lorry>
Date: Tue, 27 Jun 2017 06:07:23 +0000
Subject: webkitgtk-2.16.5

---
 Source/WTF/wtf/HashFunctions.h | 52 +++++++++++++++++++++++++++++-------------
 1 file changed, 36 insertions(+), 16 deletions(-)

(limited to 'Source/WTF/wtf/HashFunctions.h')

diff --git a/Source/WTF/wtf/HashFunctions.h b/Source/WTF/wtf/HashFunctions.h
index 471a8f375..462f19a81 100644
--- a/Source/WTF/wtf/HashFunctions.h
+++ b/Source/WTF/wtf/HashFunctions.h
@@ -21,8 +21,9 @@
 #ifndef WTF_HashFunctions_h
 #define WTF_HashFunctions_h
 
-#include <wtf/RefPtr.h>
 #include <stdint.h>
+#include <wtf/GetPtr.h>
+#include <wtf/RefPtr.h>
 
 namespace WTF {
 
@@ -119,21 +120,37 @@ namespace WTF {
 
     // pointer identity hash function
 
-    template<typename T> struct PtrHash {
-        static unsigned hash(T key)
-        {
-            return IntHash<uintptr_t>::hash(reinterpret_cast<uintptr_t>(key));
-        }
-        static bool equal(T a, T b) { return a == b; }
+    template<typename T, bool isSmartPointer> 
+    struct PtrHashBase;
+
+    template <typename T>
+    struct PtrHashBase<T, false /* isSmartPtr */> {
+        typedef T PtrType; 
+
+        static unsigned hash(PtrType key) { return IntHash<uintptr_t>::hash(reinterpret_cast<uintptr_t>(key)); }
+        static bool equal(PtrType a, PtrType b) { return a == b; }
         static const bool safeToCompareToEmptyOrDeleted = true;
     };
-    template<typename P> struct PtrHash<RefPtr<P>> : PtrHash<P*> {
-        using PtrHash<P*>::hash;
-        static unsigned hash(const RefPtr<P>& key) { return hash(key.get()); }
-        using PtrHash<P*>::equal;
-        static bool equal(const RefPtr<P>& a, const RefPtr<P>& b) { return a == b; }
-        static bool equal(P* a, const RefPtr<P>& b) { return a == b; }
-        static bool equal(const RefPtr<P>& a, P* b) { return a == b; }
+
+    template <typename T>
+    struct PtrHashBase<T, true /* isSmartPtr */> {
+        typedef typename GetPtrHelper<T>::PtrType PtrType; 
+
+        static unsigned hash(PtrType key) { return IntHash<uintptr_t>::hash(reinterpret_cast<uintptr_t>(key)); }
+        static bool equal(PtrType a, PtrType b) { return a == b; }
+        static const bool safeToCompareToEmptyOrDeleted = true;
+
+        static unsigned hash(const T& key) { return hash(getPtr(key)); }
+        static bool equal(const T& a, const T& b) { return getPtr(a) == getPtr(b); }
+        static bool equal(PtrType a, const T& b) { return a == getPtr(b); }
+        static bool equal(const T& a, PtrType b) { return getPtr(a) == b; }
+    };
+
+    template<typename T> struct PtrHash : PtrHashBase<T, IsSmartPtr<T>::value> {
+    };
+
+    template<typename P> struct PtrHash<Ref<P>> : PtrHashBase<Ref<P>, IsSmartPtr<Ref<P>>::value> {
+        static const bool safeToCompareToEmptyOrDeleted = false;
     };
 
     // default hash function for each type
@@ -149,8 +166,7 @@ namespace WTF {
         {
             return DefaultHash<T>::Hash::equal(a.first, b.first) && DefaultHash<U>::Hash::equal(a.second, b.second);
         }
-        static const bool safeToCompareToEmptyOrDeleted = DefaultHash<T>::Hash::safeToCompareToEmptyOrDeleted 
-                                                            && DefaultHash<U>::Hash::safeToCompareToEmptyOrDeleted;
+        static const bool safeToCompareToEmptyOrDeleted = DefaultHash<T>::Hash::safeToCompareToEmptyOrDeleted && DefaultHash<U>::Hash::safeToCompareToEmptyOrDeleted;
     };
 
     template<typename T, typename U> struct IntPairHash {
@@ -161,6 +177,7 @@ namespace WTF {
 
     // make IntHash the default hash function for many integer types
 
+    template<> struct DefaultHash<bool> { typedef IntHash<uint8_t> Hash; };
     template<> struct DefaultHash<short> { typedef IntHash<unsigned> Hash; };
     template<> struct DefaultHash<unsigned short> { typedef IntHash<unsigned> Hash; };
     template<> struct DefaultHash<int> { typedef IntHash<unsigned> Hash; };
@@ -181,6 +198,9 @@ namespace WTF {
 
     template<typename P> struct DefaultHash<P*> { typedef PtrHash<P*> Hash; };
     template<typename P> struct DefaultHash<RefPtr<P>> { typedef PtrHash<RefPtr<P>> Hash; };
+    template<typename P> struct DefaultHash<Ref<P>> { typedef PtrHash<Ref<P>> Hash; };
+
+    template<typename P, typename Deleter> struct DefaultHash<std::unique_ptr<P, Deleter>> { typedef PtrHash<std::unique_ptr<P, Deleter>> Hash; };
 
     // make IntPairHash the default hash function for pairs of (at most) 32-bit integers.
 
-- 
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