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

cde/programs/nsgmls/Ptr.h

@@ -0,0 +1,100 @@
+/* $XConsortium: Ptr.h /main/2 1996/08/12 16:00:24 mgreess $ */
+// Copyright (c) 1994 James Clark
+// See the file COPYING for copying permission.
+
+#ifndef Ptr_INCLUDED
+#define Ptr_INCLUDED 1
+
+#include "Boolean.h"
+
+// T must have Resource as a public base class
+// T may be an incomplete type
+
+#ifdef SP_NAMESPACE
+namespace SP_NAMESPACE {
+#endif
+
+template<class T>
+class Ptr {
+public:
+  Ptr() : ptr_(0) { }
+  Ptr(T *ptr);
+  ~Ptr();
+  Ptr(const Ptr<T> &);
+  Ptr<T> &operator=(const Ptr<T> &);
+  Ptr<T> &operator=(T *);
+  T *pointer() const { return ptr_; }
+  T *operator->() const { return ptr_; }
+  T &operator*() const { return *ptr_; }
+  void swap(Ptr<T> &p) {
+    T *tem = p.ptr_;
+    p.ptr_ = ptr_;
+    ptr_ = tem;
+  }
+  Boolean isNull() const { return ptr_ == 0; }
+  // operator const void *() const { return ptr_; }
+  void clear();
+  Boolean operator==(const Ptr<T> &p) const {
+    return ptr_ == p.ptr_;
+  }
+  Boolean operator!=(const Ptr<T> &p) const {
+    return ptr_ != p.ptr_;
+  }
+  Boolean operator==(const T *p) const {
+    return ptr_ == p;
+  }
+  Boolean operator!=(const T *p) const {
+    return ptr_ != p;
+  }
+private:
+  T *ptr_;
+};
+
+template<class T>
+#if defined (USL)
+class ConstPtr : public Ptr<T> {
+#else
+class ConstPtr : private Ptr<T> {
+#endif
+public:
+  ConstPtr() { }
+  ConstPtr(T *ptr) : Ptr<T>(ptr) { }
+  ConstPtr(const Ptr<T> &p) : Ptr<T>(p) { }
+  ConstPtr(const ConstPtr<T> &p) : Ptr<T>(p) { }
+#if defined (USL)
+#else
+  ConstPtr<T> &operator=(const Ptr<T> &p) {
+    Ptr<T>::operator=(p); return *this;
+  }
+#endif
+  ConstPtr<T> &operator=(const ConstPtr<T> &p) {
+    Ptr<T>::operator=(p); return *this;
+  }
+  ConstPtr<T> &operator=(T *p) {
+    Ptr<T>::operator=(p); return *this;
+  }
+  const T *pointer() const { return Ptr<T>::pointer(); }
+  const T *operator->() const { return Ptr<T>::pointer(); }
+  const T &operator*() const { return *Ptr<T>::pointer(); }
+  void swap(ConstPtr<T> &p) { Ptr<T>::swap(p); }
+  Ptr<T>::isNull;
+  Ptr<T>::clear;
+  Boolean operator==(const Ptr<T> &p) const { return Ptr<T>::operator==(p); }
+  Boolean operator!=(const Ptr<T> &p) const { return Ptr<T>::operator!=(p); }
+  Boolean operator==(const ConstPtr<T> &p) const {
+    return Ptr<T>::operator==(p);
+  }
+  Boolean operator!=(const ConstPtr<T> &p) const {
+    return Ptr<T>::operator!=(p);
+  }
+};
+
+#ifdef SP_NAMESPACE
+}
+#endif
+
+#endif /* not Ptr_INCLUDED */
+
+#ifdef SP_DEFINE_TEMPLATES
+#include "Ptr.C"
+#endif