/usr/include/gecode/float/arithmetic/abs.hpp is in libgecode-dev 5.1.0-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
* Guido Tack <tack@gecode.org>
* Vincent Barichard <Vincent.Barichard@univ-angers.fr>
*
* Copyright:
* Christian Schulte, 2004
* Guido Tack, 2006
* Vincent Barichard, 2012
*
* Last modified:
* $Date: 2017-04-10 13:21:37 +0200 (Mon, 10 Apr 2017) $ by $Author: schulte $
* $Revision: 15631 $
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
namespace Gecode { namespace Float { namespace Arithmetic {
template<class A, class B>
forceinline
Abs<A,B>::Abs(Home home, A x0, B x1)
: MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1) {}
template<class A, class B>
ExecStatus
Abs<A,B>::post(Home home, A x0, B x1) {
(void) new (home) Abs<A,B>(home,x0,x1);
return ES_OK;
}
template<class A, class B>
forceinline
Abs<A,B>::Abs(Space& home, bool share, Abs<A,B>& p)
: MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,share,p) {}
template<class A, class B>
Actor*
Abs<A,B>::copy(Space& home, bool share) {
return new (home) Abs<A,B>(home,share,*this);
}
template<class A, class B>
ExecStatus
Abs<A,B>::propagate(Space& home, const ModEventDelta&) {
GECODE_ME_CHECK(x1.eq(home,abs(x0.val())));
if (x0.min() >= 0)
GECODE_ME_CHECK(x0.eq(home,FloatVal(x1.min(), x1.max())));
else if (x0.max() <= 0)
GECODE_ME_CHECK(x0.eq(home,FloatVal(-x1.max(), -x1.min())));
else
GECODE_ME_CHECK(x0.eq(home,FloatVal(-x1.max(), x1.max())));
return (x0.assigned() && x1.assigned()) ? home.ES_SUBSUMED(*this) : ES_FIX;
}
}}}
// STATISTICS: float-prop
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