external/webkit r30707

1 files changed, 72 insertions, 0 deletions

diff --git a/JavaScriptCore/wtf/OwnArrayPtr.h b/JavaScriptCore/wtf/OwnArrayPtr.h
new file mode 100644
index 0000000..2b6c7dc
--- /dev/null
+++ b/JavaScriptCore/wtf/OwnArrayPtr.h
@@ -0,0 +1,72 @@
+// -*- mode: c++; c-basic-offset: 4 -*-
+/*
+ *  Copyright (C) 2006 Apple Computer, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef WTF_OwnArrayPtr_h
+#define WTF_OwnArrayPtr_h
+
+#include <algorithm>
+#include <wtf/Assertions.h>
+#include <wtf/Noncopyable.h>
+
+namespace WTF {
+
+    template <typename T> class OwnArrayPtr : Noncopyable {
+    public:
+        explicit OwnArrayPtr(T* ptr = 0) : m_ptr(ptr) { }
+        ~OwnArrayPtr() { safeDelete(); }
+
+        T* get() const { return m_ptr; }
+        T* release() { T* ptr = m_ptr; m_ptr = 0; return ptr; }
+
+        void set(T* ptr) { ASSERT(m_ptr != ptr); safeDelete(); m_ptr = ptr; }
+        void clear() { safeDelete(); m_ptr = 0; }
+
+        T& operator*() const { ASSERT(m_ptr); return *m_ptr; }
+        T* operator->() const { ASSERT(m_ptr); return m_ptr; }
+
+        T& operator[](std::ptrdiff_t i) const { ASSERT(m_ptr); ASSERT(i >= 0); return m_ptr[i]; }
+
+        bool operator!() const { return !m_ptr; }
+
+        // This conversion operator allows implicit conversion to bool but not to other integer types.
+        typedef T* OwnArrayPtr::*UnspecifiedBoolType;
+        operator UnspecifiedBoolType() const { return m_ptr ? &OwnArrayPtr::m_ptr : 0; }
+
+        void swap(OwnArrayPtr& o) { std::swap(m_ptr, o.m_ptr); }
+
+    private:
+        void safeDelete() { typedef char known[sizeof(T) ? 1 : -1]; if (sizeof(known)) delete [] m_ptr; }
+
+        T* m_ptr;
+    };
+    
+    template <typename T> inline void swap(OwnArrayPtr<T>& a, OwnArrayPtr<T>& b) { a.swap(b); }
+
+    template <typename T> inline T* getPtr(const OwnArrayPtr<T>& p)
+    {
+        return p.get();
+    }
+
+} // namespace WTF
+
+using WTF::OwnArrayPtr;
+
+#endif // WTF_OwnArrayPtr_h