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-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc. All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// 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.
-
-#ifndef GOOGLE_PROTOBUF_STUBS_SCOPED_PTR_H_
-#define GOOGLE_PROTOBUF_STUBS_SCOPED_PTR_H_
-
-#include <google/protobuf/stubs/port.h>
-
-namespace google {
-namespace protobuf {
-
-// ===================================================================
-// from google3/base/scoped_ptr.h
-
-namespace internal {
-
-// This is an implementation designed to match the anticipated future TR2
-// implementation of the scoped_ptr class, and its closely-related brethren,
-// scoped_array, scoped_ptr_malloc, and make_scoped_ptr.
-
-template <class C> class scoped_ptr;
-template <class C> class scoped_array;
-
-// A scoped_ptr<T> is like a T*, except that the destructor of scoped_ptr<T>
-// automatically deletes the pointer it holds (if any).
-// That is, scoped_ptr<T> owns the T object that it points to.
-// Like a T*, a scoped_ptr<T> may hold either NULL or a pointer to a T object.
-//
-// The size of a scoped_ptr is small:
-// sizeof(scoped_ptr<C>) == sizeof(C*)
-template <class C>
-class scoped_ptr {
- public:
-
- // The element type
- typedef C element_type;
-
- // Constructor. Defaults to initializing with NULL.
- // There is no way to create an uninitialized scoped_ptr.
- // The input parameter must be allocated with new.
- explicit scoped_ptr(C* p = NULL) : ptr_(p) { }
-
- // Destructor. If there is a C object, delete it.
- // We don't need to test ptr_ == NULL because C++ does that for us.
- ~scoped_ptr() {
- enum { type_must_be_complete = sizeof(C) };
- delete ptr_;
- }
-
- // Reset. Deletes the current owned object, if any.
- // Then takes ownership of a new object, if given.
- // this->reset(this->get()) works.
- void reset(C* p = NULL) {
- if (p != ptr_) {
- enum { type_must_be_complete = sizeof(C) };
- delete ptr_;
- ptr_ = p;
- }
- }
-
- // Accessors to get the owned object.
- // operator* and operator-> will assert() if there is no current object.
- C& operator*() const {
- assert(ptr_ != NULL);
- return *ptr_;
- }
- C* operator->() const {
- assert(ptr_ != NULL);
- return ptr_;
- }
- C* get() const { return ptr_; }
-
- // Comparison operators.
- // These return whether two scoped_ptr refer to the same object, not just to
- // two different but equal objects.
- bool operator==(C* p) const { return ptr_ == p; }
- bool operator!=(C* p) const { return ptr_ != p; }
-
- // Swap two scoped pointers.
- void swap(scoped_ptr& p2) {
- C* tmp = ptr_;
- ptr_ = p2.ptr_;
- p2.ptr_ = tmp;
- }
-
- // Release a pointer.
- // The return value is the current pointer held by this object.
- // If this object holds a NULL pointer, the return value is NULL.
- // After this operation, this object will hold a NULL pointer,
- // and will not own the object any more.
- C* release() {
- C* retVal = ptr_;
- ptr_ = NULL;
- return retVal;
- }
-
- private:
- C* ptr_;
-
- // Forbid comparison of scoped_ptr types. If C2 != C, it totally doesn't
- // make sense, and if C2 == C, it still doesn't make sense because you should
- // never have the same object owned by two different scoped_ptrs.
- template <class C2> bool operator==(scoped_ptr<C2> const& p2) const;
- template <class C2> bool operator!=(scoped_ptr<C2> const& p2) const;
-
- // Disallow evil constructors
- scoped_ptr(const scoped_ptr&);
- void operator=(const scoped_ptr&);
-};
-
-// scoped_array<C> is like scoped_ptr<C>, except that the caller must allocate
-// with new [] and the destructor deletes objects with delete [].
-//
-// As with scoped_ptr<C>, a scoped_array<C> either points to an object
-// or is NULL. A scoped_array<C> owns the object that it points to.
-//
-// Size: sizeof(scoped_array<C>) == sizeof(C*)
-template <class C>
-class scoped_array {
- public:
-
- // The element type
- typedef C element_type;
-
- // Constructor. Defaults to initializing with NULL.
- // There is no way to create an uninitialized scoped_array.
- // The input parameter must be allocated with new [].
- explicit scoped_array(C* p = NULL) : array_(p) { }
-
- // Destructor. If there is a C object, delete it.
- // We don't need to test ptr_ == NULL because C++ does that for us.
- ~scoped_array() {
- enum { type_must_be_complete = sizeof(C) };
- delete[] array_;
- }
-
- // Reset. Deletes the current owned object, if any.
- // Then takes ownership of a new object, if given.
- // this->reset(this->get()) works.
- void reset(C* p = NULL) {
- if (p != array_) {
- enum { type_must_be_complete = sizeof(C) };
- delete[] array_;
- array_ = p;
- }
- }
-
- // Get one element of the current object.
- // Will assert() if there is no current object, or index i is negative.
- C& operator[](std::ptrdiff_t i) const {
- assert(i >= 0);
- assert(array_ != NULL);
- return array_[i];
- }
-
- // Get a pointer to the zeroth element of the current object.
- // If there is no current object, return NULL.
- C* get() const {
- return array_;
- }
-
- // Comparison operators.
- // These return whether two scoped_array refer to the same object, not just to
- // two different but equal objects.
- bool operator==(C* p) const { return array_ == p; }
- bool operator!=(C* p) const { return array_ != p; }
-
- // Swap two scoped arrays.
- void swap(scoped_array& p2) {
- C* tmp = array_;
- array_ = p2.array_;
- p2.array_ = tmp;
- }
-
- // Release an array.
- // The return value is the current pointer held by this object.
- // If this object holds a NULL pointer, the return value is NULL.
- // After this operation, this object will hold a NULL pointer,
- // and will not own the object any more.
- C* release() {
- C* retVal = array_;
- array_ = NULL;
- return retVal;
- }
-
- private:
- C* array_;
-
- // Forbid comparison of different scoped_array types.
- template <class C2> bool operator==(scoped_array<C2> const& p2) const;
- template <class C2> bool operator!=(scoped_array<C2> const& p2) const;
-
- // Disallow evil constructors
- scoped_array(const scoped_array&);
- void operator=(const scoped_array&);
-};
-
-} // namespace internal
-
-// We made these internal so that they would show up as such in the docs,
-// but we don't want to stick "internal::" in front of them everywhere.
-using internal::scoped_ptr;
-using internal::scoped_array;
-
-
-} // namespace protobuf
-} // namespace google
-
-#endif // GOOGLE_PROTOBUF_STUBS_SCOPED_PTR_H_