From 201ba1f5c3d6ee6324db82bde109a310fdb2d04d Mon Sep 17 00:00:00 2001
From: KUDr <kudr@openttd.org>
Date: Fri, 26 Jan 2007 11:38:07 +0000
Subject: (svn r8414) -Codechange: Use own AutoPtrT instead of std::auto_ptr. 
 -Simplifies assignment from raw pointers  -Should be harder to crash the
 program by incorrect assignment into it.  -Should help with MorphOS
 compilation errors

---
 src/misc/autoptr.hpp | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 src/misc/autoptr.hpp

(limited to 'src/misc')

diff --git a/src/misc/autoptr.hpp b/src/misc/autoptr.hpp
new file mode 100644
index 000000000..eac3129b9
--- /dev/null
+++ b/src/misc/autoptr.hpp
@@ -0,0 +1,95 @@
+/* $Id:$ */
+
+#ifndef AUTOPTR_HPP
+#define AUTOPTR_HPP
+
+/** AutoPtrT - kind of smart pointer that ensures the owned object gets
+ *  deleted when its pointer goes out of scope.
+ *  It is non-invasive smart pointer (no reference counter).
+ *  When copied, the copy takes ownership of underlying object
+ *  and original becomes NULL!
+ *  Can be used also for polymorphic data types (interfaces).
+ */
+template <class T>
+class AutoPtrT {
+public:
+	typedef T obj_t;
+
+protected:
+	mutable T* m_p; ///< points to the data
+
+public:
+	FORCEINLINE AutoPtrT()
+	 : m_p(NULL)
+	{};
+
+	FORCEINLINE AutoPtrT(const AutoPtrT<T>& src)
+	 : m_p(src.m_p)
+	{
+		if (m_p != NULL) src.m_p = NULL;
+	};
+
+	FORCEINLINE AutoPtrT(T *p)
+	 : m_p(p)
+	{}
+
+	FORCEINLINE ~AutoPtrT()
+	{
+		if (m_p != NULL) {
+			delete m_p;
+			m_p = NULL;
+		}
+	}
+
+	/** give-up ownership and NULLify the raw pointer */
+	FORCEINLINE T* Release()
+	{
+		T* p = m_p;
+		m_p = NULL;
+		return p;
+	}
+
+	/** raw-pointer cast operator (read only) */
+	FORCEINLINE operator const T* () const
+	{
+		return m_p;
+	}
+
+	/** raw-pointer cast operator */
+	FORCEINLINE operator T* ()
+	{
+		return m_p;
+	}
+
+	/** dereference operator (read only) */
+	FORCEINLINE const T* operator -> () const
+	{
+		assert(m_p != NULL);
+		return m_p;
+	}
+
+	/** dereference operator (read / write) */
+	FORCEINLINE T* operator -> ()
+	{
+		assert(m_p != NULL);
+		return m_p;
+	}
+
+	/** assignment operator */
+	FORCEINLINE AutoPtrT& operator = (const AutoPtrT& src)
+	{
+		m_p = src.m_p;
+		if (m_p != NULL) src.m_p = NULL;
+		return *this;
+	}
+
+	/** forwarding 'lower than' operator to the underlaying items */
+	FORCEINLINE bool operator < (const AutoPtrT& other) const
+	{
+		assert(m_p != NULL);
+		assert(other.m_p != NULL);
+		return (*m_p) < (*other.m_p);
+	}
+};
+
+#endif /* AUTOPTR_HPP */
-- 
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