This file is indexed.

/usr/include/gecode/float/arithmetic/mult.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
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
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *     Vincent Barichard <Vincent.Barichard@univ-angers.fr>
 *
 *  Copyright:
 *     Christian Schulte, 2004
 *     Vincent Barichard, 2012
 *
 *  Last modified:
 *     $Date: 2013-02-04 21:28:39 +0100 (Mon, 04 Feb 2013) $ by $Author: schulte $
 *     $Revision: 13262 $
 *
 *  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 Arithmetic {

  /// Test whether \a x is postive
  template<class View>
  forceinline bool
  pos(const View& x) {
    return x.min() >= 0.0;
  }
  /// Test whether \a x is negative
  template<class View>
  forceinline bool
  neg(const View& x) {
    return x.max() <= 0.0;
  }
  /// Test whether \a x is neither positive nor negative
  template<class View>
  forceinline bool
  any(const View& x) {
    return (x.min() <= 0.0) && (x.max() >= 0.0);
  }

  /*
   * Propagator for x * y = x
   *
   */

  template<class View>
  forceinline
  MultZeroOne<View>::MultZeroOne(Home home, View x0, View x1)
    : BinaryPropagator<View,PC_FLOAT_BND>(home,x0,x1) {}

  template<class View>
  forceinline ExecStatus
  MultZeroOne<View>::post(Home home, View x0, View x1) {
    switch (rtest_eq(x0,0.0)) {
    case RT_FALSE:
      GECODE_ME_CHECK(x1.eq(home,1.0));
      break;
    case RT_TRUE:
      break;
    case RT_MAYBE:
      switch (rtest_eq(x1,1.0)) {
      case RT_FALSE:
        GECODE_ME_CHECK(x0.eq(home,0.0));
        break;
      case RT_TRUE:
        break;
      case RT_MAYBE:
        (void) new (home) MultZeroOne<View>(home,x0,x1);
        break;
      default: GECODE_NEVER;
      }
      break;
    default: GECODE_NEVER;
    }
    return ES_OK;
  }

  template<class View>
  forceinline
  MultZeroOne<View>::MultZeroOne(Space& home, bool share,
                                    MultZeroOne<View>& p)
    : BinaryPropagator<View,PC_FLOAT_BND>(home,share,p) {}

  template<class View>
  Actor*
  MultZeroOne<View>::copy(Space& home, bool share) {
    return new (home) MultZeroOne<View>(home,share,*this);
  }

  template<class View>
  ExecStatus
  MultZeroOne<View>::propagate(Space& home, const ModEventDelta&) {
    switch (rtest_eq(x0,0.0)) {
    case RT_FALSE:
      GECODE_ME_CHECK(x1.eq(home,1.0));
      break;
    case RT_TRUE:
      break;
    case RT_MAYBE:
      switch (rtest_eq(x1,1.0)) {
      case RT_FALSE:
        GECODE_ME_CHECK(x0.eq(home,0.0));
        break;
      case RT_TRUE:
        break;
      case RT_MAYBE:
        return ES_FIX;
      default: GECODE_NEVER;
      }
      break;
    default: GECODE_NEVER;
    }
    return home.ES_SUBSUMED(*this);
  }


  /*
   * Positive bounds consistent multiplication
   *
   */
  template<class VA, class VB, class VC>
  forceinline
  MultPlus<VA,VB,VC>::MultPlus(Home home, VA x0, VB x1, VC x2)
    : MixTernaryPropagator<VA,PC_FLOAT_BND,VB,PC_FLOAT_BND,VC,PC_FLOAT_BND>
  (home,x0,x1,x2) {}

  template<class VA, class VB, class VC>
  forceinline
  MultPlus<VA,VB,VC>::MultPlus(Space& home, bool share,
                                   MultPlus<VA,VB,VC>& p)
    : MixTernaryPropagator<VA,PC_FLOAT_BND,VB,PC_FLOAT_BND,VC,PC_FLOAT_BND>
  (home,share,p) {}

  template<class VA, class VB, class VC>
  Actor*
  MultPlus<VA,VB,VC>::copy(Space& home, bool share) {
    return new (home) MultPlus<VA,VB,VC>(home,share,*this);
  }

  template<class VA, class VB, class VC>
  ExecStatus
  MultPlus<VA,VB,VC>::propagate(Space& home, const ModEventDelta&) {
    if (x1.min() != 0.0) 
      GECODE_ME_CHECK(x0.eq(home,x2.val() / x1.val()));
    if (x0.min() != 0.0) 
      GECODE_ME_CHECK(x1.eq(home,x2.val() / x0.val()));
    GECODE_ME_CHECK(x2.eq(home,x0.val() * x1.val()));
    if (x0.assigned() && x1.assigned() && x2.assigned()) 
      return home.ES_SUBSUMED(*this);
    return ES_NOFIX;
  }

  template<class VA, class VB, class VC>
  forceinline ExecStatus
  MultPlus<VA,VB,VC>::post(Home home, VA x0, VB x1, VC x2) {
    GECODE_ME_CHECK(x0.gq(home,0.0));
    GECODE_ME_CHECK(x1.gq(home,0.0));
    Rounding r;
    GECODE_ME_CHECK(x2.gq(home,r.mul_down(x0.min(),x1.min())));
    (void) new (home) MultPlus<VA,VB,VC>(home,x0,x1,x2);
    return ES_OK;
  }


  /*
   * Bounds consistent multiplication
   *
   */
  template<class View>
  forceinline
  Mult<View>::Mult(Home home, View x0, View x1, View x2)
    : TernaryPropagator<View,PC_FLOAT_BND>(home,x0,x1,x2) {}

  template<class View>
  forceinline
  Mult<View>::Mult(Space& home, bool share, Mult<View>& p)
    : TernaryPropagator<View,PC_FLOAT_BND>(home,share,p) {}

  template<class View>
  Actor*
  Mult<View>::copy(Space& home, bool share) {
    return new (home) Mult<View>(home,share,*this);
  }

  template<class View>
  ExecStatus
  Mult<View>::propagate(Space& home, const ModEventDelta&) {
    Rounding r;
    if (pos(x0)) {
      if (pos(x1) || pos(x2)) goto rewrite_ppp;
      if (neg(x1) || neg(x2)) goto rewrite_pnn;
      goto prop_pxx;
    }
    if (neg(x0)) {
      if (neg(x1) || pos(x2)) goto rewrite_nnp;
      if (pos(x1) || neg(x2)) goto rewrite_npn;
      goto prop_nxx;
    }
    if (pos(x1)) {
      if (pos(x2)) goto rewrite_ppp;
      if (neg(x2)) goto rewrite_npn;
      goto prop_xpx;
    }
    if (neg(x1)) {
      if (pos(x2)) goto rewrite_nnp;
      if (neg(x2)) goto rewrite_pnn;
      goto prop_xnx;
    }

    assert(any(x0) && any(x1));
    GECODE_ME_CHECK(x2.lq(home,std::max(r.mul_up(x0.max(),x1.max()),
                                        r.mul_up(x0.min(),x1.min()))));
    GECODE_ME_CHECK(x2.gq(home,std::min(r.mul_down(x0.min(),x1.max()),
                                        r.mul_down(x0.max(),x1.min()))));

    if (pos(x2)) {
      if (r.div_up(x2.min(),x1.min()) < x0.min())
        GECODE_ME_CHECK(x0.gq(home,0));
      if (r.div_up(x2.min(),x0.min()) < x1.min())
        GECODE_ME_CHECK(x1.gq(home,0));
    }
    if (neg(x2)) {
      if (r.div_up(x2.max(),x1.max()) < x0.min())
        GECODE_ME_CHECK(x0.gq(home,0));
      if (r.div_up(x2.max(),x0.max()) < x1.min())
        GECODE_ME_CHECK(x1.gq(home,0));
    }

    if (x0.assigned()) {
      assert((x0.val() == 0.0) && (x2.val() == 0.0));
      return home.ES_SUBSUMED(*this);
    }

    if (x1.assigned()) {
      assert((x1.val() == 0.0) && (x2.val() == 0.0));
      return home.ES_SUBSUMED(*this);
    }

    return ES_NOFIX;

  prop_xpx:
    std::swap(x0,x1);
  prop_pxx:
    assert(pos(x0) && any(x1) && any(x2));

    GECODE_ME_CHECK(x2.lq(home,r.mul_up(x0.max(),x1.max())));
    GECODE_ME_CHECK(x2.gq(home,r.mul_down(x0.max(),x1.min())));

    if (pos(x2)) goto rewrite_ppp;
    if (neg(x2)) goto rewrite_pnn;

    GECODE_ME_CHECK(x1.lq(home,r.div_up(x2.max(),x0.min())));
    GECODE_ME_CHECK(x1.gq(home,r.div_down(x2.min(),x0.min())));

    if (x0.assigned() && x1.assigned()) {
      GECODE_ME_CHECK(x2.eq(home,x0.val()*x1.val()));
      return home.ES_SUBSUMED(*this);
    }

    return ES_NOFIX;

  prop_xnx:
    std::swap(x0,x1);
  prop_nxx:
    assert(neg(x0) && any(x1) && any(x2));

    GECODE_ME_CHECK(x2.lq(home,r.mul_up(x0.min(),x1.min())));
    GECODE_ME_CHECK(x2.gq(home,r.mul_down(x0.min(),x1.max())));

    if (pos(x2)) goto rewrite_nnp;
    if (neg(x2)) goto rewrite_npn;

    if (x0.max() != 0.0) {
      GECODE_ME_CHECK(x1.lq(home,r.div_up(x2.min(),x0.max())));
      GECODE_ME_CHECK(x1.gq(home,r.div_down(x2.max(),x0.max())));
    }

    if (x0.assigned() && x1.assigned()) {
      GECODE_ME_CHECK(x2.eq(home,x0.val()*x1.val()));
      return home.ES_SUBSUMED(*this);
    }

    return ES_NOFIX;

  rewrite_ppp:
    GECODE_REWRITE(*this,(MultPlus<FloatView,FloatView,FloatView>
                         ::post(home(*this),x0,x1,x2)));
  rewrite_nnp:
    GECODE_REWRITE(*this,(MultPlus<MinusView,MinusView,FloatView>
                         ::post(home(*this),MinusView(x0),MinusView(x1),x2)));
  rewrite_pnn:
    std::swap(x0,x1);
  rewrite_npn:
    GECODE_REWRITE(*this,(MultPlus<MinusView,FloatView,MinusView>
                         ::post(home(*this),MinusView(x0),x1,MinusView(x2))));
  }

  template<class View>
  ExecStatus
  Mult<View>::post(Home home, View x0, View x1, View x2) {
    if (same(x0,x1))
      return Sqr<View>::post(home,x0,x2);
    if (same(x0,x2))
      return MultZeroOne<View>::post(home,x0,x1);
    if (same(x1,x2))
      return MultZeroOne<View>::post(home,x1,x0);
    if (pos(x0)) {
      if (pos(x1) || pos(x2)) goto post_ppp;
      if (neg(x1) || neg(x2)) goto post_pnn;
    } else if (neg(x0)) {
      if (neg(x1) || pos(x2)) goto post_nnp;
      if (pos(x1) || neg(x2)) goto post_npn;
    } else if (pos(x1)) {
      if (pos(x2)) goto post_ppp;
      if (neg(x2)) goto post_npn;
    } else if (neg(x1)) {
      if (pos(x2)) goto post_nnp;
      if (neg(x2)) goto post_pnn;
    }
    {
      GECODE_ME_CHECK(x2.eq(home,x0.val()*x1.val()));
      (void) new (home) Mult<View>(home,x0,x1,x2);
    }
    return ES_OK;

  post_ppp:
    return MultPlus<FloatView,FloatView,FloatView>::post(home,x0,x1,x2);
  post_nnp:
    return MultPlus<MinusView,MinusView,FloatView>::post(home,
      MinusView(x0),MinusView(x1),x2);
  post_pnn:
    std::swap(x0,x1);
  post_npn:
    return MultPlus<MinusView,FloatView,MinusView>::post(home,
      MinusView(x0),x1,MinusView(x2));
  }


}}}

// STATISTICS: float-prop