This file is indexed.

/usr/include/gecode/int/nvalues/int-base.hpp is in libgecode-dev 3.7.1-3.

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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2011
 *
 *  Last modified:
 *     $Date: 2011-09-07 16:15:16 +0200 (Wed, 07 Sep 2011) $ by $Author: schulte $
 *     $Revision: 12394 $
 *
 *  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 <gecode/int/distinct.hh>

namespace Gecode { namespace Int { namespace NValues {

  template<class VY>
  forceinline
  IntBase<VY>::IntBase(Home home, ValSet& vs0, ViewArray<IntView>& x, VY y)
    : MixNaryOnePropagator<IntView,PC_INT_DOM,VY,PC_INT_BND>(home,x,y),
      vs(vs0) {}

  template<class VY>
  forceinline
  IntBase<VY>::IntBase(Space& home, bool share, IntBase<VY>& p)
    : MixNaryOnePropagator<IntView,PC_INT_DOM,VY,PC_INT_BND>(home, share, p) {
    vs.update(home, share, p.vs);
  }

  template<class VY>
  forceinline size_t
  IntBase<VY>::dispose(Space& home) {
    vs.dispose(home);
    (void) MixNaryOnePropagator<IntView,PC_INT_DOM,VY,PC_INT_BND>
      ::dispose(home);
    return sizeof(*this);
  }

  template<class VY>
  PropCost 
  IntBase<VY>::cost(const Space&, const ModEventDelta&) const {
    return PropCost::quadratic(PropCost::HI, x.size());
  }

  template<class VY>
  void
  IntBase<VY>::add(Space& home) {
    int n=x.size();
    for (int i=n; i--; )
      if (x[i].assigned()) {
        vs.add(home, x[i].val());
        x[i] = x[--n];
      }
    x.size(n);
  }

  template<class VY>
  void
  IntBase<VY>::disjoint(Space& home, Region& r, int*& dis, int& n_dis) {
    // Compute positions of disjoint views
    int n=x.size();
    dis = r.alloc<int>(n); n_dis = 0;

    int i=0;
    while (i < n)
      switch (vs.compare(x[i])) {
      case Iter::Ranges::CS_SUBSET:
        // All values are already contained in vs, eliminate x[i]
        x[i].cancel(home, *this, PC_INT_DOM);
        x[i] = x[--n]; 
        break;
      case Iter::Ranges::CS_DISJOINT:
        dis[n_dis++] = i++; 
        break;
      case Iter::Ranges::CS_NONE:
        i++;
        break;
      default:
        GECODE_NEVER;
      }
    x.size(n);
  }

  template<class VY>
  void
  IntBase<VY>::eliminate(Space& home) {
    int n=x.size();
    for (int i=n; i--; )
      if (vs.subset(x[i])) {
        // All values are already contained in vs, eliminate x[i]
        x[i].cancel(home, *this, PC_INT_DOM);
        x[i] = x[--n]; 
      }
    x.size(n);
  }

  template<class VY>
  int
  IntBase<VY>::size(Space& home) const {
    Region r(home);
    assert(x.size() > 0);
    Iter::Ranges::NaryUnion 
      u(r,ValSet::Ranges(vs),ViewRanges<IntView>(x[x.size()-1]));
    for (int i=x.size()-1; i--; )
      u |= ViewRanges<IntView>(x[i]);
    unsigned int s = Iter::Ranges::size(u);

    // To avoid overflow
    if (static_cast<unsigned int>(x.size()+vs.size()) < s)
      return x.size() + vs.size();
    else
      return static_cast<int>(s);
  }

  template<class VY>
  ExecStatus
  IntBase<VY>::all_in_valset(Space& home) {
    for (int i=x.size(); i--; ) {
      ValSet::Ranges vsr(vs);
      GECODE_ME_CHECK(x[i].inter_r(home, vsr, false));
    }
    return home.ES_SUBSUMED(*this);
  }

  template<class VY>
  ExecStatus
  IntBase<VY>::prune_lower(Space& home, int* dis, int n_dis) {
    assert(n_dis > 0);

    // At least one more value will be needed
    GECODE_ME_CHECK(y.gq(home,vs.size() + 1));

    Region r(home);

    // Only one additional value is allowed
    if (y.max() == vs.size() + 1) {
      // Compute possible values
      ViewRanges<IntView>* r_dis = r.alloc<ViewRanges<IntView> >(n_dis);
      for (int i=n_dis; i--; )
        r_dis[i] = ViewRanges<IntView>(x[dis[i]]);
      Iter::Ranges::NaryInter iv(r, r_dis, n_dis);
      // Is there a common value at all?
      if (!iv())
        return ES_FAILED;
      ValSet::Ranges vsr(vs);
      Iter::Ranges::NaryUnion pv(r,iv,vsr);
      // Enforce common values
      for (int i=x.size(); i--; ) {
        pv.reset();
        GECODE_ME_CHECK(x[i].inter_r(home, pv, false));
      }
      return ES_OK;
    }

    // Compute independent set for lower bound
    // ovl is a bit-matrix defining whether two views overlap
    SymBitMatrix ovl(r,x.size());
    // deg[i] is the degree of x[i]
    int* deg = r.alloc<int>(x.size());
    // ovl_i[i] is an array of indices j such that x[j] overlaps with x[i]
    int** ovl_i = r.alloc<int*>(x.size());
    // n_ovl_i[i] defines how many integers are stored for ovl_i[i]
    int* n_ovl_i = r.alloc<int>(x.size());
    {
#ifndef NDEBUG
      // Initialize all to null pointers so that things crash ;-)
      for (int i=x.size(); i--; )
        ovl_i[i] = NULL;
#endif
      // For each i there can be at most n_dis-1 entries in ovl_i[i]
      int* m = r.alloc<int>(n_dis*(n_dis-1));
      for (int i=n_dis; i--; ) {
        deg[dis[i]] = 0; 
        ovl_i[dis[i]] = m; m += n_dis-1;
      }
    }
    
    // Initialize overlap matrix by analyzing the view ranges
    {
      // Compute how many events are needed
      // One event for the end marker
      int n_re = 1;
      // Two events for each range
      for (int i=n_dis; i--; )
        for (ViewRanges<IntView> rx(x[dis[i]]); rx(); ++rx)
          n_re += 2;

      // Allocate and initialize events
      RangeEvent* re = r.alloc<RangeEvent>(n_re);
      int j=0;
      for (int i=n_dis; i--; )
        for (ViewRanges<IntView> rx(x[dis[i]]); rx(); ++rx) {
          // Event when a range starts
          re[j].ret=RET_FST; re[j].val=rx.min(); re[j].view=dis[i]; j++;
          // Event when a range ends
          re[j].ret=RET_LST; re[j].val=rx.max(); re[j].view=dis[i]; j++;
        }
      // Make this the last event
      re[j].ret=RET_END; re[j].val=Int::Limits::infinity;
      assert(j+1 == n_re);
      // Sort and process events
      Support::quicksort(re,n_re);

      // Current views with a range being active
      Support::BitSet<Region> cur(r,static_cast<unsigned int>(x.size()));
      // Process all events
      for (int i=0; true; i++)
        switch (re[i].ret) {
        case RET_FST:
          // Process all overlapping views
          for (Iter::Values::BitSet<Support::BitSet<Region> > j(cur); 
               j(); ++j) {
            int di = re[i].view, dj = j.val();
            if (!ovl.get(di,dj))  {
              ovl.set(di,dj);
              ovl_i[di][deg[di]++] = dj; 
              ovl_i[dj][deg[dj]++] = di; 
            }
          }
          cur.set(static_cast<unsigned int>(re[i].view));
          break;
        case RET_LST:
          cur.clear(static_cast<unsigned int>(re[i].view));
          break;
        case RET_END:
          goto done;
        default:
          GECODE_NEVER;
        }
    done:
      r.free<RangeEvent>(re,n_re);
    }

    // While deg changes, n_ovl_i remains unchanged and is needed, so copy it
    for (int i=n_dis; i--; ) {
      assert(deg[dis[i]] < n_dis);
      n_ovl_i[dis[i]] = deg[dis[i]];
    }
    
    // Views in the independent set
    int* ind = r.alloc<int>(n_dis);
    int n_ind = 0;

    while (n_dis > 0) {
      int i_min = n_dis-1;
      int d_min = deg[dis[i_min]];
      unsigned int s_min = x[dis[i_min]].size(); 

      // Find view with smallest (degree,size)
      for (int i=n_dis-1; i--; )
        if ((d_min > deg[dis[i]]) || 
            ((d_min == deg[dis[i]]) && (s_min > x[dis[i]].size()))) {
          i_min = i;
          d_min = deg[dis[i]];
          s_min = x[dis[i]].size();
        }

      // i_min refers to view with smallest (degree,size)
      ind[n_ind++] = dis[i_min]; dis[i_min] = dis[--n_dis];
      
      // Filter out non disjoint views
      for (int i=n_dis; i--; )
        if (ovl.get(dis[i],ind[n_ind-1])) {
          // Update degree information
          for (int j=n_ovl_i[dis[i]]; j--; )
            deg[ovl_i[dis[i]][j]]--;
          // Eliminate view
          dis[i] = dis[--n_dis];
        }
    }
    // Enforce lower bound
    GECODE_ME_CHECK(y.gq(home,vs.size() + n_ind));

    // Prune, if possible
    if (vs.size() + n_ind == y.max()) {
      // Only values from the indepent set a can be taken
      ViewRanges<IntView>* r_ind = r.alloc<ViewRanges<IntView> >(n_ind);
      for (int i=n_ind; i--; )
        r_ind[i] = ViewRanges<IntView>(x[ind[i]]);
      Iter::Ranges::NaryUnion v_ind(r, r_ind, n_ind);
      ValSet::Ranges vsr(vs);
      v_ind |= vsr;
      for (int i=x.size(); i--; ) {
        v_ind.reset();
        GECODE_ME_CHECK(x[i].inter_r(home,v_ind,false));
      }
    } 
    return ES_OK;
  }

  template<class VY>
  forceinline ExecStatus
  IntBase<VY>::prune_upper(Space& home, Graph& g) {
    if (!g.initialized()) {
      g.init(home,vs,x);
    } else {
      g.purge();
      g.sync(home);
    }
    GECODE_ME_CHECK(y.lq(home, g.size()));
    if (y.min() == g.size()) {
      // All values must be taken on
      if (vs.size() + x.size() == g.size()) {
        // This is in fact a distinct, simplify and rewrite
        for (int i=x.size(); i--; ) {
          ValSet::Ranges vsr(vs);
          GECODE_ME_CHECK(x[i].minus_r(home, vsr, false));
        }
        GECODE_REWRITE(*this,Distinct::Dom<IntView>::post(home,x));
      }
      if (g.mark(home))
        GECODE_ES_CHECK(g.prune(home));
    }
    return ES_OK;
  }

}}}

// STATISTICS: int-prop