From cb1b03f4d8a76677b06134f7b9d40e45c1923a8b Mon Sep 17 00:00:00 2001
From: Baruch Zukerman <baruchzu@post.tau.ac.il>
Date: Sun, 18 Jun 2006 12:40:01 +0000
Subject: [PATCH] hash function for integers

---
 .gitattributes                                |  1 +
 .../CGAL/Sweep_line_2/Integer_hash_function.h | 40 +++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 Arrangement_2/include/CGAL/Sweep_line_2/Integer_hash_function.h

diff --git a/.gitattributes b/.gitattributes
index 43728a1a3ad..baf4044fb41 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -258,6 +258,7 @@ Arrangement_2/doc_tex/Sweep_line_2/sl_simple.ps -text
 Arrangement_2/examples/Arrangement_2/ex_dual_lines.C -text
 Arrangement_2/examples/Arrangement_2/ex_unbounded_non_intersecting.C -text
 Arrangement_2/examples/Arrangement_2/points.dat -text
+Arrangement_2/include/CGAL/Sweep_line_2/Integer_hash_function.h eol=lf
 Arrangement_of_spheres_3/include/CGAL/Arrangement_of_spheres_3/Sphere_key.h -text
 Arrangement_of_spheres_3/include/CGAL/Tools/Coordinate_index.h -text
 Arrangement_of_spheres_3/src/CGAL/Arrangement_of_spheres_traits_3.C -text
diff --git a/Arrangement_2/include/CGAL/Sweep_line_2/Integer_hash_function.h b/Arrangement_2/include/CGAL/Sweep_line_2/Integer_hash_function.h
new file mode 100644
index 00000000000..21f9a51b3b9
--- /dev/null
+++ b/Arrangement_2/include/CGAL/Sweep_line_2/Integer_hash_function.h
@@ -0,0 +1,40 @@
+// Copyright (c) 1997  Tel-Aviv University (Israel).
+// All rights reserved.
+//
+// This file is part of CGAL (www.cgal.org); you may redistribute it under
+// the terms of the Q Public License version 1.0.
+// See the file LICENSE.QPL distributed with CGAL.
+//
+// Licensees holding a valid commercial license may use this file in
+// accordance with the commercial license agreement provided with the software.
+//
+// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// $URL$
+// $Id$
+// 
+//
+// Author(s)     : Baruch Zukerman <baruchzu@post.tau.ac.il>
+
+#ifndef CGAL_INTEGER_HASH_FUNCTION
+#define CGAL_INTEGER_HASH_FUNCTION
+
+#include <CGAL/basic.h>
+#include <cstddef>
+
+CGAL_BEGIN_NAMESPACE
+
+struct Integer_hash_function 
+{
+    typedef std::size_t result_type;
+
+    std::size_t operator() (unsigned int i) const 
+    { 
+        return i;
+    } 
+};
+
+CGAL_END_NAMESPACE
+
+#endif