/usr/include/gecode/float/transcendental/exp-log.hpp is in libgecode-dev 4.2.1-2.
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:
* Vincent Barichard <Vincent.Barichard@univ-angers.fr>
*
* Copyright:
* Vincent Barichard, 2012
*
* Last modified:
* $Date: 2012-07-27 10:25:47 +0200 (Fri, 27 Jul 2012) $ by $Author: vbarichard $
* $Revision: 12971 $
*
* 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 Transcendental {
/*
* Bounds consistent exponential operator
*
*/
template<class A, class B>
forceinline
Exp<A,B>::Exp(Home home, A x0, B x1)
: MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1) {}
template<class A, class B>
ExecStatus
Exp<A,B>::post(Home home, A x0, B x1) {
if (same(x0,x1)) {
return ES_FAILED;
} else {
GECODE_ME_CHECK(x1.gq(home,0.0));
}
(void) new (home) Exp<A,B>(home,x0,x1);
return ES_OK;
}
template<class A, class B>
forceinline
Exp<A,B>::Exp(Space& home, bool share, Exp<A,B>& p)
: MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,share,p) {}
template<class A, class B>
Actor*
Exp<A,B>::copy(Space& home, bool share) {
return new (home) Exp<A,B>(home,share,*this);
}
template<class A, class B>
ExecStatus
Exp<A,B>::propagate(Space& home, const ModEventDelta&) {
GECODE_ME_CHECK(x1.eq(home,exp(x0.domain())));
if (x1.max() == 0.0)
return ES_FAILED;
GECODE_ME_CHECK(x0.eq(home,log(x1.domain())));
return x0.assigned() ? home.ES_SUBSUMED(*this) : ES_FIX;
}
/*
* Bounds consistent logarithm operator with base
*
*/
template<class A, class B>
forceinline
Pow<A,B>::Pow(Home home, FloatNum base0, A x0, B x1)
: MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1),
base(base0) {}
template<class A, class B>
ExecStatus
Pow<A,B>::post(Home home, FloatNum base, A x0, B x1) {
if (base <= 0) return ES_FAILED;
if (same(x0,x1)) {
GECODE_ME_CHECK(x0.eq(home,0.0));
} else {
GECODE_ME_CHECK(x1.gq(home,0.0));
(void) new (home) Pow<A,B>(home,base,x0,x1);
}
return ES_OK;
}
template<class A, class B>
forceinline
Pow<A,B>::Pow(Space& home, bool share, Pow<A,B>& p)
: MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,share,p),
base(p.base) {}
template<class A, class B>
Actor*
Pow<A,B>::copy(Space& home, bool share) {
return new (home) Pow<A,B>(home,share,*this);
}
template<class A, class B>
ExecStatus
Pow<A,B>::propagate(Space& home, const ModEventDelta&) {
if (x1.max() == 0.0)
return ES_FAILED;
GECODE_ME_CHECK(x0.eq(home,log(x1.domain())/log(base)));
GECODE_ME_CHECK(x1.eq(home,exp(x0.domain()*log(base))));
return x0.assigned() ? home.ES_SUBSUMED(*this) : ES_FIX;
}
}}}
// STATISTICS: float-prop
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