--- /dev/null
+#ifndef CRYPTOPP_SMARTPTR_H
+#define CRYPTOPP_SMARTPTR_H
+
+#include "config.h"
+#include <algorithm>
+
+NAMESPACE_BEGIN(CryptoPP)
+
+template <class T> class simple_ptr
+{
+public:
+ simple_ptr() : m_p(NULL) {}
+ ~simple_ptr() {delete m_p;}
+ T *m_p;
+};
+
+template <class T> class member_ptr
+{
+public:
+ explicit member_ptr(T *p = NULL) : m_p(p) {}
+
+ ~member_ptr();
+
+ const T& operator*() const { return *m_p; }
+ T& operator*() { return *m_p; }
+
+ const T* operator->() const { return m_p; }
+ T* operator->() { return m_p; }
+
+ const T* get() const { return m_p; }
+ T* get() { return m_p; }
+
+ T* release()
+ {
+ T *old_p = m_p;
+ m_p = 0;
+ return old_p;
+ }
+
+ void reset(T *p = 0);
+
+protected:
+ member_ptr(const member_ptr<T>& rhs); // copy not allowed
+ void operator=(const member_ptr<T>& rhs); // assignment not allowed
+
+ T *m_p;
+};
+
+template <class T> member_ptr<T>::~member_ptr() {delete m_p;}
+template <class T> void member_ptr<T>::reset(T *p) {delete m_p; m_p = p;}
+
+// ********************************************************
+
+template<class T> class value_ptr : public member_ptr<T>
+{
+public:
+ value_ptr(const T &obj) : member_ptr<T>(new T(obj)) {}
+ value_ptr(T *p = NULL) : member_ptr<T>(p) {}
+ value_ptr(const value_ptr<T>& rhs)
+ : member_ptr<T>(rhs.m_p ? new T(*rhs.m_p) : NULL) {}
+
+ value_ptr<T>& operator=(const value_ptr<T>& rhs);
+ bool operator==(const value_ptr<T>& rhs)
+ {
+ return (!this->m_p && !rhs.m_p) || (this->m_p && rhs.m_p && *this->m_p == *rhs.m_p);
+ }
+};
+
+template <class T> value_ptr<T>& value_ptr<T>::operator=(const value_ptr<T>& rhs)
+{
+ T *old_p = this->m_p;
+ this->m_p = rhs.m_p ? new T(*rhs.m_p) : NULL;
+ delete old_p;
+ return *this;
+}
+
+// ********************************************************
+
+template<class T> class clonable_ptr : public member_ptr<T>
+{
+public:
+ clonable_ptr(const T &obj) : member_ptr<T>(obj.Clone()) {}
+ clonable_ptr(T *p = NULL) : member_ptr<T>(p) {}
+ clonable_ptr(const clonable_ptr<T>& rhs)
+ : member_ptr<T>(rhs.m_p ? rhs.m_p->Clone() : NULL) {}
+
+ clonable_ptr<T>& operator=(const clonable_ptr<T>& rhs);
+};
+
+template <class T> clonable_ptr<T>& clonable_ptr<T>::operator=(const clonable_ptr<T>& rhs)
+{
+ T *old_p = this->m_p;
+ this->m_p = rhs.m_p ? rhs.m_p->Clone() : NULL;
+ delete old_p;
+ return *this;
+}
+
+// ********************************************************
+
+template<class T> class counted_ptr
+{
+public:
+ explicit counted_ptr(T *p = 0);
+ counted_ptr(const T &r) : m_p(0) {attach(r);}
+ counted_ptr(const counted_ptr<T>& rhs);
+
+ ~counted_ptr();
+
+ const T& operator*() const { return *m_p; }
+ T& operator*() { return *m_p; }
+
+ const T* operator->() const { return m_p; }
+ T* operator->() { return get(); }
+
+ const T* get() const { return m_p; }
+ T* get();
+
+ void attach(const T &p);
+
+ counted_ptr<T> & operator=(const counted_ptr<T>& rhs);
+
+private:
+ T *m_p;
+};
+
+template <class T> counted_ptr<T>::counted_ptr(T *p)
+ : m_p(p)
+{
+ if (m_p)
+ m_p->m_referenceCount = 1;
+}
+
+template <class T> counted_ptr<T>::counted_ptr(const counted_ptr<T>& rhs)
+ : m_p(rhs.m_p)
+{
+ if (m_p)
+ m_p->m_referenceCount++;
+}
+
+template <class T> counted_ptr<T>::~counted_ptr()
+{
+ if (m_p && --m_p->m_referenceCount == 0)
+ delete m_p;
+}
+
+template <class T> void counted_ptr<T>::attach(const T &r)
+{
+ if (m_p && --m_p->m_referenceCount == 0)
+ delete m_p;
+ if (r.m_referenceCount == 0)
+ {
+ m_p = r.clone();
+ m_p->m_referenceCount = 1;
+ }
+ else
+ {
+ m_p = const_cast<T *>(&r);
+ m_p->m_referenceCount++;
+ }
+}
+
+template <class T> T* counted_ptr<T>::get()
+{
+ if (m_p && m_p->m_referenceCount > 1)
+ {
+ T *temp = m_p->clone();
+ m_p->m_referenceCount--;
+ m_p = temp;
+ m_p->m_referenceCount = 1;
+ }
+ return m_p;
+}
+
+template <class T> counted_ptr<T> & counted_ptr<T>::operator=(const counted_ptr<T>& rhs)
+{
+ if (m_p != rhs.m_p)
+ {
+ if (m_p && --m_p->m_referenceCount == 0)
+ delete m_p;
+ m_p = rhs.m_p;
+ if (m_p)
+ m_p->m_referenceCount++;
+ }
+ return *this;
+}
+
+// ********************************************************
+
+template <class T> class vector_member_ptrs
+{
+public:
+ vector_member_ptrs(size_t size=0)
+ : m_size(size), m_ptr(new member_ptr<T>[size]) {}
+ ~vector_member_ptrs()
+ {delete [] this->m_ptr;}
+
+ member_ptr<T>& operator[](size_t index)
+ {assert(index<this->m_size); return this->m_ptr[index];}
+ const member_ptr<T>& operator[](size_t index) const
+ {assert(index<this->m_size); return this->m_ptr[index];}
+
+ size_t size() const {return this->m_size;}
+ void resize(size_t newSize)
+ {
+ member_ptr<T> *newPtr = new member_ptr<T>[newSize];
+ for (size_t i=0; i<this->m_size && i<newSize; i++)
+ newPtr[i].reset(this->m_ptr[i].release());
+ delete [] this->m_ptr;
+ this->m_size = newSize;
+ this->m_ptr = newPtr;
+ }
+
+private:
+ vector_member_ptrs(const vector_member_ptrs<T> &c); // copy not allowed
+ void operator=(const vector_member_ptrs<T> &x); // assignment not allowed
+
+ size_t m_size;
+ member_ptr<T> *m_ptr;
+};
+
+NAMESPACE_END
+
+#endif
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