Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/nsgmls/Ptr.C

@@ -0,0 +1,73 @@
+/* $XConsortium: Ptr.C /main/1 1996/07/29 17:02:08 cde-hp $ */
+// Copyright (c) 1994 James Clark
+// See the file COPYING for copying permission.
+
+#ifndef Ptr_DEF_INCLUDED
+#define Ptr_DEF_INCLUDED 1
+
+#ifdef SP_NAMESPACE
+namespace SP_NAMESPACE {
+#endif
+
+template<class T>
+Ptr<T>::Ptr(T *ptr) : ptr_(ptr)
+{
+  if (ptr_)
+    ptr_->ref();
+}
+
+template<class T>
+Ptr<T>::~Ptr()
+{
+  if (ptr_) {
+    if (ptr_->unref())
+      delete ptr_;
+    ptr_ = 0;
+  }
+}
+
+template<class T>
+Ptr<T>::Ptr(const Ptr<T> &p)
+: ptr_(p.ptr_)
+{
+  if (p.ptr_)
+    p.ptr_->ref();
+}
+
+template<class T>
+Ptr<T> &Ptr<T>::operator=(const Ptr<T> &p)
+{
+  if (p.ptr_)
+    p.ptr_->ref();
+  if (ptr_ && ptr_->unref())
+    delete ptr_;
+  ptr_ = p.ptr_;
+  return *this;
+}
+
+template<class T>
+Ptr<T> &Ptr<T>::operator=(T *p)
+{
+  if (p)
+    p->ref();
+  if (ptr_ && ptr_->unref())
+    delete ptr_;
+  ptr_ = p;
+  return *this;
+}
+
+template<class T>
+void Ptr<T>::clear()
+{
+  if (ptr_) {
+    if (ptr_->unref())
+      delete ptr_;
+    ptr_ = 0;
+  }
+}
+
+#ifdef SP_NAMESPACE
+}
+#endif
+
+#endif /* not Ptr_DEF_INCLUDED */