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rel-test.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  *     Vincent Barichard <Vincent.Barichard@univ-angers.fr>
00006  *
00007  *  Copyright:
00008  *     Christian Schulte, 2003
00009  *     Vincent Barichard, 2012
00010  *
00011  *  This file is part of Gecode, the generic constraint
00012  *  development environment:
00013  *     http://www.gecode.org
00014  *
00015  *  Permission is hereby granted, free of charge, to any person obtaining
00016  *  a copy of this software and associated documentation files (the
00017  *  "Software"), to deal in the Software without restriction, including
00018  *  without limitation the rights to use, copy, modify, merge, publish,
00019  *  distribute, sublicense, and/or sell copies of the Software, and to
00020  *  permit persons to whom the Software is furnished to do so, subject to
00021  *  the following conditions:
00022  *
00023  *  The above copyright notice and this permission notice shall be
00024  *  included in all copies or substantial portions of the Software.
00025  *
00026  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00027  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00028  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00029  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00030  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00031  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00032  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00033  *
00034  */
00035 
00036 namespace Gecode { namespace Float {
00037 
00038   template<class View>
00039   forceinline RelTest
00040   rtest_eq(View x, View y) {
00041     if ((x.min() > y.max()) || (x.max() < y.min())) return RT_FALSE;
00042     return (x.assigned() && y.assigned()) ? RT_TRUE : RT_MAYBE;
00043   }
00044 
00045   template<class View>
00046   forceinline RelTest
00047   rtest_eq(View x, FloatVal n) {
00048     if ((x.min() > n.max()) || (x.max() < n.min())) return RT_FALSE;
00049     return x.assigned() ? RT_TRUE : RT_MAYBE;
00050   }
00051 
00052   template<class View>
00053   forceinline RelTest
00054   rtest_lq(View x, View y) {
00055     if (x.max() <= y.min()) return RT_TRUE;
00056     if (x.min() > y.max())  return RT_FALSE;
00057     return RT_MAYBE;
00058   }
00059 
00060   template<class View>
00061   forceinline RelTest
00062   rtest_lq(View x, FloatVal n) {
00063     if (x.max() <= n.min()) return RT_TRUE;
00064     if (x.min() > n.max())  return RT_FALSE;
00065     return RT_MAYBE;
00066   }
00067 
00068   template<class View>
00069   forceinline RelTest
00070   rtest_le(View x, View y) {
00071     if (x.max() < y.min()) return RT_TRUE;
00072     if (x.min() >= y.max())  return RT_FALSE;
00073     return RT_MAYBE;
00074   }
00075 
00076   template<class View>
00077   forceinline RelTest
00078   rtest_le(View x, FloatVal n) {
00079     if (x.max() < n.min()) return RT_TRUE;
00080     if (x.min() >= n.max())  return RT_FALSE;
00081     return RT_MAYBE;
00082   }
00083 
00084 }}
00085 
00086 // STATISTICS: float-var
00087