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bin-packing.cpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2010
8  *
9  * Last modified:
10  * $Date: 2013-03-28 22:24:21 +0100 (Thu, 28 Mar 2013) $ by $Author: tack $
11  * $Revision: 13561 $
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37 
39 
40 namespace Gecode {
41 
42  void
44  const IntVarArgs& l,
45  const IntVarArgs& b, const IntArgs& s,
46  IntConLevel) {
47  using namespace Int;
48  if (l.same(home,b))
49  throw ArgumentSame("Int::binpacking");
50  if (b.size() != s.size())
51  throw ArgumentSizeMismatch("Int::binpacking");
52  for (int i=s.size(); i--; )
53  Limits::nonnegative(s[i],"Int::binpacking");
54  if (home.failed()) return;
55 
56  ViewArray<OffsetView> lv(home,l.size());
57  for (int i=l.size(); i--; )
58  lv[i] = OffsetView(l[i],0);
59 
60  if (b.size() == 0) {
61  for (int i=l.size(); i--; )
62  GECODE_ME_FAIL(lv[i].eq(home,0));
63  return;
64  }
65 
66  ViewArray<BinPacking::Item> bs(home,b.size());
67  for (int i=bs.size(); i--; )
68  bs[i] = BinPacking::Item(b[i],s[i]);
69 
70  Support::quicksort(&bs[0], bs.size());
71 
73  }
74 
75 }
76 
77 // STATISTICS: int-post
IntConLevel
Consistency levels for integer propagators.
Definition: int.hh:935
NNF * l
Left subtree.
Definition: bool-expr.cpp:244
int size(void) const
Return size of array (number of elements)
Definition: array.hpp:1662
Item combining bin and size information.
Definition: bin-packing.hh:53
struct Gecode::@511::NNF::@54::@55 b
For binary nodes (and, or, eqv)
void nonnegative(int n, const char *l)
Check whether n is in range and nonnegative, otherwise throw out of limits with information l.
Definition: limits.hpp:72
static ExecStatus post(Home home, ViewArray< OffsetView > &l, ViewArray< Item > &bs)
Post propagator for loads l and items bs.
Definition: propagate.cpp:358
Gecode::IntArgs i(4, 1, 2, 3, 4)
void quicksort(Type *l, Type *r, Less &less)
Standard quick sort.
Definition: sort.hpp:134
bool failed(void) const
Check whether corresponding space is failed.
Definition: core.hpp:3369
Offset integer view.
Definition: view.hpp:422
View arrays.
Definition: array.hpp:234
Passing integer variables.
Definition: int.hh:634
Passing integer arguments.
Definition: int.hh:605
Exception: Arguments contain same variable multiply
Definition: exception.hpp:84
#define GECODE_ME_FAIL(me)
Check whether modification event me is failed, and fail space home.
Definition: macros.hpp:70
void binpacking(Home home, const IntVarArgs &l, const IntVarArgs &b, const IntArgs &s, IntConLevel)
Post propagator for bin packing.
Definition: bin-packing.cpp:43
Gecode toplevel namespace
Home class for posting propagators
Definition: core.hpp:717
Exception: Arguments are of different size
Definition: exception.hpp:77
#define GECODE_ES_FAIL(es)
Check whether execution status es is failed, and fail space home.
Definition: macros.hpp:96