Incomplete work for using Boost.Polygon to compute medial axis

xs/src/boost/test/utils/fixed_mapping.hpp

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+//  (C) Copyright Gennadiy Rozental 2001-2008.
+//  Distributed under the Boost Software License, Version 1.0.
+//  (See accompanying file LICENSE_1_0.txt or copy at 
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/test for the library home page.
+//
+//  File        : $RCSfile$
+//
+//  Version     : $Revision: 54633 $
+//
+//  Description : fixed sized mapping with specified invalid value
+// ***************************************************************************
+
+#ifndef BOOST_TEST_FIXED_MAPPING_HPP_071894GER
+#define BOOST_TEST_FIXED_MAPPING_HPP_071894GER
+
+// Boost
+#include <boost/preprocessor/repetition/repeat.hpp>
+#include <boost/preprocessor/arithmetic/add.hpp>
+#include <boost/call_traits.hpp>
+#include <boost/detail/binary_search.hpp>
+
+// STL
+#include <vector>
+#include <functional>
+#include <algorithm>
+#include <utility>
+
+#include <boost/test/detail/suppress_warnings.hpp>
+
+//____________________________________________________________________________//
+
+namespace boost {
+
+namespace unit_test {
+
+// configurable maximum fixed sized mapping size supported by this header.
+// You can redefine it before inclusion of this file.
+#ifndef MAX_MAP_SIZE
+#define MAX_MAP_SIZE 20
+#endif
+
+#define CONSTR_DECL_MID( z, i, dummy1 ) key_param_type key##i, value_param_type v##i,
+#define CONSTR_BODY_MID( z, i, dummy1 ) add_pair( key##i, v##i );
+
+#define CONSTR_DECL( z, n, dummy1 )                                 \
+    fixed_mapping( BOOST_PP_REPEAT_ ## z( n, CONSTR_DECL_MID, "" )  \
+                         value_param_type invalid_value )           \
+    : m_invalid_value( invalid_value )                              \
+    {                                                               \
+        BOOST_PP_REPEAT_ ## z( n, CONSTR_BODY_MID, "" )             \
+        init();                                                     \
+    }                                                               \
+/**/
+
+#define CONTRUCTORS( n ) BOOST_PP_REPEAT( n, CONSTR_DECL, "" )
+
+template<typename Key, typename Value, typename Compare = std::less<Key> >
+class fixed_mapping
+{
+    typedef std::pair<Key,Value>                            elem_type;
+    typedef std::vector<elem_type>                          map_type;
+    typedef typename std::vector<elem_type>::const_iterator iterator;
+
+    typedef typename call_traits<Key>::param_type           key_param_type;
+    typedef typename call_traits<Value>::param_type         value_param_type;
+    typedef typename call_traits<Value>::const_reference    value_ref_type;
+
+#if BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042))
+    struct p1; friend struct p1;
+    struct p2; friend struct p2;
+#endif
+
+    // bind( Compare(), bind(select1st<elem_type>(), _1),  bind(identity<Key>(), _2) )
+    struct p1 : public std::binary_function<elem_type,Key,bool>
+    {
+        bool operator()( elem_type const& x, Key const& y ) const { return Compare()( x.first, y ); }
+    };
+
+    // bind( Compare(), bind(select1st<elem_type>(), _1), bind(select1st<elem_type>(), _2) )
+    struct p2 : public std::binary_function<elem_type,elem_type,bool>
+    {
+        bool operator()( elem_type const& x, elem_type const& y ) const { return Compare()( x.first, y.first ); }
+    };
+
+public:
+    // Constructors
+    CONTRUCTORS( BOOST_PP_ADD( MAX_MAP_SIZE, 1 ) )
+
+    // key -> value access
+    value_ref_type  operator[]( key_param_type key ) const
+    {
+        iterator it = boost::detail::lower_bound( m_map.begin(), m_map.end(), key, p1() );
+
+        return (it == m_map.end() || Compare()( key, it->first ) ) ? m_invalid_value : it->second;
+    }
+
+private:
+    // Implementation
+    void            init()                                                  { std::sort( m_map.begin(), m_map.end(), p2() ); }
+    void            add_pair( key_param_type key, value_param_type value )  { m_map.push_back( elem_type( key, value ) ); }
+
+    // Data members
+    Value           m_invalid_value;
+    map_type        m_map;
+};
+
+} // namespace unit_test
+
+} // namespace boost
+
+//____________________________________________________________________________//
+
+#include <boost/test/detail/enable_warnings.hpp>
+
+#undef MAX_MAP_SIZE
+#undef CONSTR_DECL_MID
+#undef CONSTR_BODY_MID
+#undef CONSTR_DECL
+#undef CONTRUCTORS
+
+#endif // BOOST_TEST_FIXED_MAPPING_HPP_071894GER
+