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+// Copyright 2010 The Kyua Authors.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+//   notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright
+//   notice, this list of conditions and the following disclaimer in the
+//   documentation and/or other materials provided with the distribution.
+// * Neither the name of Google Inc. nor the names of its contributors
+//   may be used to endorse or promote products derived from this software
+//   without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#if !defined(UTILS_AUTO_ARRAY_IPP)
+#define UTILS_AUTO_ARRAY_IPP
+
+#include "utils/auto_array.hpp"
+
+namespace utils {
+
+
+namespace detail {
+
+
+/// Constructs a new auto_array_ref from a pointer.
+///
+/// \param ptr The pointer to wrap.
+template< class T > inline
+auto_array_ref< T >::auto_array_ref(T* ptr) :
+    _ptr(ptr)
+{
+}
+
+
+}  // namespace detail
+
+
+/// Constructs a new auto_array from a given pointer.
+///
+/// This grabs ownership of the pointer unless it is NULL.
+///
+/// \param ptr The pointer to wrap.  If not NULL, the memory pointed to must
+/// have been allocated with operator new[].
+template< class T > inline
+auto_array< T >::auto_array(T* ptr) throw() :
+    _ptr(ptr)
+{
+}
+
+
+/// Constructs a copy of an auto_array.
+///
+/// \param ptr The pointer to copy from.  This pointer is invalidated and the
+/// new copy grabs ownership of the object pointed to.
+template< class T > inline
+auto_array< T >::auto_array(auto_array< T >& ptr) throw() :
+    _ptr(ptr.release())
+{
+}
+
+
+/// Constructs a new auto_array form a reference.
+///
+/// Internal function used to construct a new auto_array from an object
+/// returned, for example, from a function.
+///
+/// \param ref The reference.
+template< class T > inline
+auto_array< T >::auto_array(detail::auto_array_ref< T > ref) throw() :
+    _ptr(ref._ptr)
+{
+}
+
+
+/// Destructor for auto_array objects.
+template< class T > inline
+auto_array< T >::~auto_array(void) throw()
+{
+    if (_ptr != NULL)
+        delete [] _ptr;
+}
+
+
+/// Gets the value of the wrapped pointer without releasing ownership.
+///
+/// \return The raw mutable pointer.
+template< class T > inline
+T*
+auto_array< T >::get(void) throw()
+{
+    return _ptr;
+}
+
+
+/// Gets the value of the wrapped pointer without releasing ownership.
+///
+/// \return The raw immutable pointer.
+template< class T > inline
+const T*
+auto_array< T >::get(void) const throw()
+{
+    return _ptr;
+}
+
+
+/// Gets the value of the wrapped pointer and releases ownership.
+///
+/// \return The raw mutable pointer.
+template< class T > inline
+T*
+auto_array< T >::release(void) throw()
+{
+    T* ptr = _ptr;
+    _ptr = NULL;
+    return ptr;
+}
+
+
+/// Changes the value of the wrapped pointer.
+///
+/// If the auto_array was pointing to an array, such array is released and the
+/// wrapped pointer is replaced with the new pointer provided.
+///
+/// \param ptr The pointer to use as a replacement; may be NULL.
+template< class T > inline
+void
+auto_array< T >::reset(T* ptr) throw()
+{
+    if (_ptr != NULL)
+        delete [] _ptr;
+    _ptr = ptr;
+}
+
+
+/// Assignment operator.
+///
+/// \param ptr The object to copy from.  This is invalidated after the copy.
+/// \return A reference to the auto_array object itself.
+template< class T > inline
+auto_array< T >&
+auto_array< T >::operator=(auto_array< T >& ptr) throw()
+{
+    reset(ptr.release());
+    return *this;
+}
+
+
+/// Internal assignment operator for function returns.
+///
+/// \param ref The reference object to copy from.
+/// \return A reference to the auto_array object itself.
+template< class T > inline
+auto_array< T >&
+auto_array< T >::operator=(detail::auto_array_ref< T > ref) throw()
+{
+    if (_ptr != ref._ptr) {
+        delete [] _ptr;
+        _ptr = ref._ptr;
+    }
+    return *this;
+}
+
+
+/// Subscript operator to access the array by position.
+///
+/// This does not perform any bounds checking, in particular because auto_array
+/// does not know the size of the arrays pointed to by it.
+///
+/// \param pos The position to access, indexed from zero.
+///
+/// \return A mutable reference to the element at the specified position.
+template< class T > inline
+T&
+auto_array< T >::operator[](int pos) throw()
+{
+    return _ptr[pos];
+}
+
+
+/// Subscript operator to access the array by position.
+///
+/// This does not perform any bounds checking, in particular because auto_array
+/// does not know the size of the arrays pointed to by it.
+///
+/// \param pos The position to access, indexed from zero.
+///
+/// \return An immutable reference to the element at the specified position.
+template< class T > inline
+const T&
+auto_array< T >::operator[](int pos) const throw()
+{
+    return _ptr[pos];
+}
+
+
+/// Internal conversion to a reference wrapper.
+///
+/// This is used internally to support returning auto_array objects from
+/// functions.  The auto_array is invalidated when used.
+///
+/// \return A new detail::auto_array_ref object holding the pointer.
+template< class T > inline
+auto_array< T >::operator detail::auto_array_ref< T >(void) throw()
+{
+    return detail::auto_array_ref< T >(release());
+}
+
+
+}  // namespace utils
+
+
+#endif  // !defined(UTILS_AUTO_ARRAY_IPP)