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cloud/load.hh
1 // Copyright (C) 2009, 2012 EPITA Research and Development Laboratory
2 // (LRDE)
3 //
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20 // instantiate templates or use macros or inline functions from this
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26 
27 #ifndef MLN_IO_CLOUD_LOAD_HH
28 # define MLN_IO_CLOUD_LOAD_HH
29 
41 
42 # include <iostream>
43 # include <fstream>
44 
45 # include <mln/core/concept/image.hh>
46 # include <mln/core/site_set/p_array.hh>
47 
48 namespace mln
49 {
50 
51  namespace io
52  {
53 
54  namespace cloud
55  {
56 
64  template <typename P>
65  void load(p_array<P>& arr, const std::string& filename);
66 
67 
68 # ifndef MLN_INCLUDE_ONLY
69 
70  namespace internal
71  {
72 
73  template <typename P>
74  inline
75  void load_data(p_array<P>& arr, std::ifstream& file)
76  {
77  std::string line;
78  while (std::getline(file, line))
79  {
80  algebra::vec<P::dim,float> v;
81  std::istringstream sline(line);
82  sline >> v[0] >> v[1] >> v[2];
83  arr.append(v);
84  }
85  }
86 
87  } // end of namespace mln::io::cloud::internal
88 
89 
90 
91  template <typename P>
92  void load(p_array<P>& arr, const std::string& filename)
93  {
94  mln_trace("mln::io::cloud::load");
95 
97  mln_precondition(P::dim == 3u);
98 
99  std::ifstream file(filename.c_str());
100  if (! file)
101  {
102  std::cerr << "error: cannot open file '" << filename << "'!";
103  abort();
104  }
105 
106  internal::load_data(arr, file);
107 
108  }
109 
110 
111 # endif // ! MLN_INCLUDE_ONLY
112 
113  } // end of namespace mln::io::cloud
114 
115  } // end of namespace mln::io
116 
117 } // end of namespace mln
118 
119 #endif // ! MLN_IO_CLOUD_LOAD_HH