author | Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com> |
Mon, 30 Mar 2009 12:54:55 +0300 | |
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permissions | -rw-r--r-- |
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// -*- mode: c++; c-basic-offset: 4 -*- |
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/* |
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* Copyright (C) 2006 Apple Computer, Inc. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#ifndef WTF_OwnArrayPtr_h |
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#define WTF_OwnArrayPtr_h |
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#include <algorithm> |
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#include <wtf/Assertions.h> |
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#include <wtf/Noncopyable.h> |
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namespace WTF { |
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template <typename T> class OwnArrayPtr : Noncopyable { |
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public: |
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explicit OwnArrayPtr(T* ptr = 0) : m_ptr(ptr) { } |
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~OwnArrayPtr() { safeDelete(); } |
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T* get() const { return m_ptr; } |
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T* release() { T* ptr = m_ptr; m_ptr = 0; return ptr; } |
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void set(T* ptr) { ASSERT(m_ptr != ptr); safeDelete(); m_ptr = ptr; } |
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void clear() { safeDelete(); m_ptr = 0; } |
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T& operator*() const { ASSERT(m_ptr); return *m_ptr; } |
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T* operator->() const { ASSERT(m_ptr); return m_ptr; } |
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T& operator[](std::ptrdiff_t i) const { ASSERT(m_ptr); ASSERT(i >= 0); return m_ptr[i]; } |
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bool operator!() const { return !m_ptr; } |
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// This conversion operator allows implicit conversion to bool but not to other integer types. |
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typedef T* (OwnArrayPtr::*UnspecifiedBoolType)() const; |
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operator UnspecifiedBoolType() const { return m_ptr ? &OwnArrayPtr::get : 0; } |
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void swap(OwnArrayPtr& o) { std::swap(m_ptr, o.m_ptr); } |
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private: |
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void safeDelete() { typedef char known[sizeof(T) ? 1 : -1]; if (sizeof(known)) delete [] m_ptr; } |
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T* m_ptr; |
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}; |
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template <typename T> inline void swap(OwnArrayPtr<T>& a, OwnArrayPtr<T>& b) { a.swap(b); } |
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template <typename T> inline T* getPtr(const OwnArrayPtr<T>& p) |
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{ |
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return p.get(); |
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} |
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} // namespace WTF |
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using WTF::OwnArrayPtr; |
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#endif // WTF_OwnArrayPtr_h |