/usr/include/gecode/int/unary/opt-prop.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:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2009
*
* Last modified:
* $Date: 2011-05-25 16:56:41 +0200 (Wed, 25 May 2011) $ by $Author: schulte $
* $Revision: 12022 $
*
* 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.
*
*/
#include <algorithm>
namespace Gecode { namespace Int { namespace Unary {
template<class OptTask>
forceinline
OptProp<OptTask>::OptProp(Home home, TaskArray<OptTask>& t)
: TaskProp<OptTask,Int::PC_INT_BND>(home,t) {}
template<class OptTask>
forceinline
OptProp<OptTask>::OptProp(Space& home, bool shared, OptProp<OptTask>& p)
: TaskProp<OptTask,Int::PC_INT_BND>(home,shared,p) {}
template<class OptTask>
forceinline ExecStatus
OptProp<OptTask>::post(Home home, TaskArray<OptTask>& t) {
int m=0, o=0;
for (int i=t.size(); i--; ) {
if (t[i].mandatory())
m++;
else if (t[i].optional())
o++;
}
if (m == t.size()) {
TaskArray<typename TaskTraits<OptTask>::ManTask> mt(home,m);
for (int i=m; i--; )
mt[i].init(t[i]);
return ManProp<typename TaskTraits<OptTask>::ManTask>::post(home,mt);
}
if (o+m > 1)
(void) new (home) OptProp<OptTask>(home,t);
return ES_OK;
}
template<class OptTask>
Actor*
OptProp<OptTask>::copy(Space& home, bool share) {
return new (home) OptProp<OptTask>(home,share,*this);
}
template<class OptTask>
ExecStatus
OptProp<OptTask>::propagate(Space& home, const ModEventDelta& med) {
// Did one of the Boolean views change?
if (Int::BoolView::me(med) == Int::ME_BOOL_VAL)
GECODE_ES_CHECK((purge<OptTask,Int::PC_INT_BND>(home,*this,t)));
GECODE_ES_CHECK(overload(home,*this,t));
GECODE_ES_CHECK(detectable(home,*this,t));
GECODE_ES_CHECK(notfirstnotlast(home,*this,t));
// Partition into mandatory and optional activities
int n = t.size();
int i=0, j=n-1;
while (true) {
while ((i < n) && t[i].mandatory()) i++;
while ((j >= 0) && !t[j].mandatory()) j--;
if (i >= j) break;
std::swap(t[i],t[j]);
}
if (i > 1) {
// Truncate array to only contain mandatory tasks
t.size(i);
GECODE_ES_CHECK(edgefinding(home,t));
// Restore to also include optional tasks
t.size(n);
}
GECODE_ES_CHECK(subsumed(home,*this,t));
return ES_NOFIX;
}
}}}
// STATISTICS: int-prop
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