This file is indexed.

/usr/include/CGAL/Ray_2.h is in libcgal-dev 4.2-5ubuntu1.

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
// Copyright (c) 1999  
// Utrecht University (The Netherlands),
// ETH Zurich (Switzerland),
// INRIA Sophia-Antipolis (France),
// Max-Planck-Institute Saarbruecken (Germany),
// and Tel-Aviv University (Israel).  All rights reserved. 
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 3 of the License,
// or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
// 
//
// Author(s)     : Andreas Fabri

#ifndef CGAL_RAY_2_H
#define CGAL_RAY_2_H

#include <CGAL/assertions.h>
#include <boost/type_traits/is_same.hpp>
#include <CGAL/Kernel/Return_base_tag.h>
#include <CGAL/representation_tags.h>
#include <CGAL/Dimension.h>

namespace CGAL {

template <class R_>
class Ray_2 : public R_::Kernel_base::Ray_2
{
  typedef typename R_::RT                    RT;
  typedef typename R_::FT                    FT;
  typedef typename R_::Point_2               Point_2;
  typedef typename R_::Direction_2           Direction_2;
  typedef typename R_::Vector_2              Vector_2;
  typedef typename R_::Line_2                Line_2;
  typedef typename R_::Aff_transformation_2  Aff_transformation_2;

  typedef typename R_::Kernel_base::Ray_2    RRay_2;

  typedef Ray_2                              Self;
  CGAL_static_assertion((boost::is_same<Self, typename R_::Ray_2>::value));

public:

  typedef Dimension_tag<2>  Ambient_dimension;
  typedef Dimension_tag<1>  Feature_dimension;

  typedef RRay_2 Rep;

  const Rep& rep() const
  {
    return *this;
  }

  Rep& rep()
  {
    return *this;
  }

  typedef  R_   R;

  Ray_2() {}

  Ray_2(const RRay_2& r)
    : RRay_2(r) {}

  Ray_2(const Point_2 &sp, const Point_2 &secondp)
    : RRay_2(typename R::Construct_ray_2()(Return_base_tag(), sp, secondp)) {}

  Ray_2(const Point_2 &sp, const Direction_2 &d)
    : RRay_2(typename R::Construct_ray_2()(Return_base_tag(), sp, d)) {}

  Ray_2(const Point_2 &sp, const Vector_2 &v)
    : RRay_2(typename R::Construct_ray_2()(Return_base_tag(), sp, v)) {}

  Ray_2(const Point_2 &sp, const Line_2 &l)
    : RRay_2(typename R::Construct_ray_2()(Return_base_tag(), sp, l)) {}


  typename cpp11::result_of<typename R_::Construct_source_2( Ray_2)>::type
  source() const
  {
    return R().construct_source_2_object()(*this);
  }

  typename cpp11::result_of<typename R_::Construct_second_point_2( Ray_2)>::type
  second_point() const
  {
    return R().construct_second_point_2_object()(*this);
  }


  Point_2
  point(int i) const
  {
    CGAL_kernel_precondition( i >= 0 );
    
    typename R::Construct_vector_2 construct_vector;
    typename R::Construct_scaled_vector_2 construct_scaled_vector;
    typename R::Construct_translated_point_2 construct_translated_point;
    if (i == 0) return source();
    if (i == 1) return second_point();
    return construct_translated_point(source(),
				      construct_scaled_vector(construct_vector(source(), 
									       second_point()),
							      FT(i)));
  }


  typename cpp11::result_of<typename R_::Construct_source_2( Ray_2 )>::type
  start() const
  {
    return source();
  }

  bool is_horizontal() const
  {
    return R().equal_y_2_object()(source(), second_point());
  }

  bool is_vertical() const
  {
    return R().equal_x_2_object()(source(), second_point());
  }

  bool is_degenerate() const
  {
    return R().is_degenerate_2_object()(*this);
  }

  Direction_2
  direction() const
  {
    typename R::Construct_vector_2 construct_vector;
    typename R::Construct_direction_2 construct_direction;
    return construct_direction( construct_vector(source(), second_point()) );
  }


  Vector_2
  to_vector() const
  {
    typename R::Construct_vector_2 construct_vector;
    return construct_vector(source(), second_point());
  }

  bool
  has_on(const Point_2 &p) const
  {
    typename R::Construct_vector_2  construct_vector;
    return p == source() ||
         ( R().collinear_2_object()(source(), p, second_point()) &&
           Direction_2(construct_vector( source(), p)) == direction() );
  }



  bool
  collinear_has_on(const Point_2 &p) const
  {
    return R().collinear_has_on_2_object()(*this, p);
  }

  Ray_2
  opposite() const
  {
    return Ray_2( source(), - direction() );
  }

  Line_2
  supporting_line() const
  {
    return R().construct_line_2_object()(source(), second_point());
  }

  bool
  operator==(const Ray_2& r) const
  {
    return R().equal_2_object()(*this, r);
  }

  bool
  operator!=(const Ray_2& r) const
  {
    return !(*this == r);
  }

  Ray_2 
  transform(const Aff_transformation_2 &t) const
  {
    return Ray_2(t.transform(source()), t.transform(second_point()));
  }

};


template <class R >
std::ostream&
insert(std::ostream& os, const Ray_2<R>& r, const Cartesian_tag&) 
{
    switch(os.iword(IO::mode)) {
    case IO::ASCII :
        return os << r.source() << ' ' << r.second_point();
    case IO::BINARY :
        return os << r.source() << r.second_point();
    default:
        return os << "RayC2(" << r.source() <<  ", " << r.second_point() << ")";
    }
}

template <class R >
std::ostream&
insert(std::ostream& os, const Ray_2<R>& r, const Homogeneous_tag&)
{
  switch(os.iword(IO::mode))
  {
    case IO::ASCII :
        return os << r.source() << ' ' << r.second_point();
    case IO::BINARY :
        return os << r.source() << r.second_point();
    default:
       return os << "RayH2(" << r.source() <<  ", " << r.second_point() << ")";
  }
}

template < class R >
std::ostream&
operator<<(std::ostream& os, const Ray_2<R>& r)
{
  return insert(os, r, typename R::Kernel_tag() );
}


template <class R >
std::istream&
extract(std::istream& is, Ray_2<R>& r, const Cartesian_tag&) 
{
    typename R::Point_2 p, q;
    is >> p >> q;
    if (is)
        r = Ray_2<R>(p, q);
    return is;
}


template <class R >
std::istream&
extract(std::istream& is, Ray_2<R>& r, const Homogeneous_tag&) 
{
  typename R::Point_2 p, q;
  is >> p >> q;
  if (is)
    r = Ray_2<R>(p, q);
  return is;
}

template < class R >
std::istream&
operator>>(std::istream& is, Ray_2<R>& r)
{
  return extract(is, r, typename R::Kernel_tag() );
}

} //namespace CGAL

#endif  // CGAL_RAY_2_H