Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 157 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/wtf/OwnArrayPtr.h b/Source/JavaScriptCore/wtf/OwnArrayPtr.h
new file mode 100644
index 000000000..0fc8e71b3
--- /dev/null
+++ b/Source/JavaScriptCore/wtf/OwnArrayPtr.h
@@ -0,0 +1,157 @@
+/*
+ *  Copyright (C) 2006, 2010 Apple Inc. All rights reserved.
+ *
+ *  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 "Assertions.h"
+#include "Noncopyable.h"
+#include "NullPtr.h"
+#include "PassOwnArrayPtr.h"
+#include <algorithm>
+
+namespace WTF {
+
+template<typename T> class PassOwnArrayPtr;
+template<typename T> PassOwnArrayPtr<T> adoptArrayPtr(T*);
+
+template <typename T> class OwnArrayPtr {
+public:
+    typedef T* PtrType;
+
+    OwnArrayPtr() : m_ptr(0) { }
+
+    // See comment in PassOwnArrayPtr.h for why this takes a const reference.
+    template<typename U> OwnArrayPtr(const PassOwnArrayPtr<U>& o);
+
+    // This copy constructor is used implicitly by gcc when it generates
+    // transients for assigning a PassOwnArrayPtr<T> object to a stack-allocated
+    // OwnArrayPtr<T> object. It should never be called explicitly and gcc
+    // should optimize away the constructor when generating code.
+    OwnArrayPtr(const OwnArrayPtr<T>&);
+
+    ~OwnArrayPtr() { deleteOwnedArrayPtr(m_ptr); }
+
+    PtrType get() const { return m_ptr; }
+
+    void clear();
+    PassOwnArrayPtr<T> release();
+    PtrType leakPtr() WARN_UNUSED_RETURN;
+
+    T& operator*() const { ASSERT(m_ptr); return *m_ptr; }
+    PtrType 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; }
+
+    OwnArrayPtr& operator=(const PassOwnArrayPtr<T>&);
+    OwnArrayPtr& operator=(std::nullptr_t) { clear(); return *this; }
+    template<typename U> OwnArrayPtr& operator=(const PassOwnArrayPtr<U>&);
+
+    void swap(OwnArrayPtr& o) { std::swap(m_ptr, o.m_ptr); }
+
+private:
+    PtrType m_ptr;
+};
+
+template<typename T> template<typename U> inline OwnArrayPtr<T>::OwnArrayPtr(const PassOwnArrayPtr<U>& o)
+    : m_ptr(o.leakPtr())
+{
+}
+
+template<typename T> inline void OwnArrayPtr<T>::clear()
+{
+    PtrType ptr = m_ptr;
+    m_ptr = 0;
+    deleteOwnedArrayPtr(ptr);
+}
+
+template<typename T> inline PassOwnArrayPtr<T> OwnArrayPtr<T>::release()
+{
+    PtrType ptr = m_ptr;
+    m_ptr = 0;
+    return adoptArrayPtr(ptr);
+}
+
+template<typename T> inline typename OwnArrayPtr<T>::PtrType OwnArrayPtr<T>::leakPtr()
+{
+    PtrType ptr = m_ptr;
+    m_ptr = 0;
+    return ptr;
+}
+
+template<typename T> inline OwnArrayPtr<T>& OwnArrayPtr<T>::operator=(const PassOwnArrayPtr<T>& o)
+{
+    PtrType ptr = m_ptr;
+    m_ptr = o.leakPtr();
+    ASSERT(!ptr || m_ptr != ptr);
+    deleteOwnedArrayPtr(ptr);
+    return *this;
+}
+
+template<typename T> template<typename U> inline OwnArrayPtr<T>& OwnArrayPtr<T>::operator=(const PassOwnArrayPtr<U>& o)
+{
+    PtrType ptr = m_ptr;
+    m_ptr = o.leakPtr();
+    ASSERT(!ptr || m_ptr != ptr);
+    deleteOwnedArrayPtr(ptr);
+    return *this;
+}
+
+template <typename T> inline void swap(OwnArrayPtr<T>& a, OwnArrayPtr<T>& b)
+{
+    a.swap(b);
+}
+
+template<typename T, typename U> inline bool operator==(const OwnArrayPtr<T>& a, U* b)
+{
+    return a.get() == b; 
+}
+
+template<typename T, typename U> inline bool operator==(T* a, const OwnArrayPtr<U>& b) 
+{
+    return a == b.get(); 
+}
+
+template<typename T, typename U> inline bool operator!=(const OwnArrayPtr<T>& a, U* b)
+{
+    return a.get() != b; 
+}
+
+template<typename T, typename U> inline bool operator!=(T* a, const OwnArrayPtr<U>& b)
+{
+    return a != b.get(); 
+}
+
+template <typename T> inline T* getPtr(const OwnArrayPtr<T>& p)
+{
+    return p.get();
+}
+
+} // namespace WTF
+
+using WTF::OwnArrayPtr;
+
+#endif // WTF_OwnArrayPtr_h