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ranges-offset.hpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christian Schulte <schulte@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Christian Schulte, 2004
00008  *
00009  *  This file is part of Gecode, the generic constraint
00010  *  development environment:
00011  *     http://www.gecode.org
00012  *
00013  *  Permission is hereby granted, free of charge, to any person obtaining
00014  *  a copy of this software and associated documentation files (the
00015  *  "Software"), to deal in the Software without restriction, including
00016  *  without limitation the rights to use, copy, modify, merge, publish,
00017  *  distribute, sublicense, and/or sell copies of the Software, and to
00018  *  permit persons to whom the Software is furnished to do so, subject to
00019  *  the following conditions:
00020  *
00021  *  The above copyright notice and this permission notice shall be
00022  *  included in all copies or substantial portions of the Software.
00023  *
00024  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00025  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00026  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00027  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00028  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00029  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00030  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00031  *
00032  */
00033 
00034 namespace Gecode { namespace Iter { namespace Ranges {
00035 
00041   template<class I>
00042   class Offset {
00043   protected:
00045     I i;
00047     int c;
00048   public:
00050 
00051 
00052     Offset(void);
00054     Offset(I& i, int c);
00056     void init(I& i, int c);
00058 
00060 
00061 
00062     bool operator ()(void) const;
00064     void operator ++(void);
00066 
00068 
00069 
00070     int min(void) const;
00072     int max(void) const;
00074     unsigned int width(void) const;
00076   };
00077 
00078 
00079   template<class I>
00080   forceinline
00081   Offset<I>::Offset(void) {}
00082 
00083   template<class I>
00084   inline void
00085   Offset<I>::init(I& i0, int c0) {
00086     i = i0; c = c0;
00087   }
00088 
00089   template<class I>
00090   inline
00091   Offset<I>::Offset(I& i0, int c0) : i(i0), c(c0) {}
00092 
00093   template<class I>
00094   forceinline void
00095   Offset<I>::operator ++(void) {
00096     ++i;
00097   }
00098   template<class I>
00099   forceinline bool
00100   Offset<I>::operator ()(void) const {
00101     return i();
00102   }
00103 
00104   template<class I>
00105   forceinline int
00106   Offset<I>::min(void) const {
00107     return i.min()+c;
00108   }
00109   template<class I>
00110   forceinline int
00111   Offset<I>::max(void) const {
00112     return i.max()+c;
00113   }
00114   template<class I>
00115   forceinline unsigned int
00116   Offset<I>::width(void) const {
00117     return i.width();
00118   }
00119 
00120 }}}
00121 
00122 // STATISTICS: iter-any
00123