/usr/include/gecode/int/no-overlap/opt.hpp is in libgecode-dev 4.4.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 | /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2011
*
* Last modified:
* $Date: 2012-10-22 21:13:52 +0200 (Mon, 22 Oct 2012) $ by $Author: schulte $
* $Revision: 13163 $
*
* 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 Int { namespace NoOverlap {
template<class Box>
forceinline
OptProp<Box>::OptProp(Home home, Box* b, int n, int m0)
: Base<Box>(home,b,n), m(m0) {
for (int i=m; i--; )
b[n+i].subscribe(home, *this);
}
template<class Box>
ExecStatus
OptProp<Box>::post(Home home, Box* b, int n) {
// Partition into mandatory and optional boxes
if (n > 1) {
int p = Base<Box>::partition(b, 0, n);
(void) new (home) OptProp<Box>(home,b,p,n-p);
}
return ES_OK;
}
template<class Box>
forceinline size_t
OptProp<Box>::dispose(Space& home) {
for (int i=m; i--; )
b[n+i].cancel(home, *this);
(void) Base<Box>::dispose(home);
return sizeof(*this);
}
template<class Box>
forceinline
OptProp<Box>::OptProp(Space& home, bool shared, OptProp<Box>& p)
: Base<Box>(home, shared, p, p.n + p.m), m(p.m) {}
template<class Box>
Actor*
OptProp<Box>::copy(Space& home, bool share) {
return new (home) OptProp<Box>(home,share,*this);
}
template<class Box>
ExecStatus
OptProp<Box>::propagate(Space& home, const ModEventDelta& med) {
Region r(home);
if (BoolView::me(med) == ME_BOOL_VAL) {
// Eliminate excluded boxes
for (int i=m; i--; )
if (b[n+i].excluded()) {
b[n+i].cancel(home,*this);
b[n+i] = b[n+(--m)];
}
// Reconsider optional boxes
if (m > 0) {
int p = Base<Box>::partition(b+n, 0, m);
n += p; m -= p;
}
}
// Number of disjoint boxes
int* db = r.alloc<int>(n);
for (int i=n; i--; )
db[i] = n-1;
// Number of boxes to be eliminated
int e = 0;
for (int i=n; i--; ) {
assert(b[i].mandatory());
for (int j=i; j--; )
if (b[i].nooverlap(b[j])) {
assert(db[i] > 0); assert(db[j] > 0);
if (--db[i] == 0) e++;
if (--db[j] == 0) e++;
continue;
} else {
GECODE_ES_CHECK(b[i].nooverlap(home,b[j]));
}
}
if (m == 0) {
if (e == n)
return home.ES_SUBSUMED(*this);
int i = n-1;
while (e > 0) {
// Eliminate boxes that do not overlap
while (db[i] > 0)
i--;
b[i].cancel(home, *this);
b[i] = b[--n]; b[n] = b[n+m];
e--; i--;
}
if (n < 2)
return home.ES_SUBSUMED(*this);
}
// Check whether some optional boxes must be excluded
for (int i=m; i--; ) {
if (b[n+i].optional()) {
for (int j=n; j--; )
if (b[n+i].overlap(b[j])) {
GECODE_ES_CHECK(b[n+i].exclude(home));
b[n+i].cancel(home,*this);
b[n+i] = b[n+(--m)];
break;
}
} else {
// This might be the case if the same Boolean view occurs
// several times and has already been excluded
assert(b[n+i].excluded());
b[n+i].cancel(home,*this);
b[n+i] = b[n+(--m)];
}
}
return ES_NOFIX;
}
}}}
// STATISTICS: int-prop
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