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raw/get_header.hh
1 // Copyright (C) 2010, 2012 EPITA Research and Development Laboratory
2 // (LRDE)
3 //
4 // This file is part of Olena.
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6 // Olena is free software: you can redistribute it and/or modify it under
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8 // Software Foundation, version 2 of the License.
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13 // General Public License for more details.
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16 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
17 //
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20 // instantiate templates or use macros or inline functions from this
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25 // executable file might be covered by the GNU General Public License.
26 
27 #ifndef MLN_IO_RAW_GET_HEADER_HH
28 # define MLN_IO_RAW_GET_HEADER_HH
29 
33 
34 # include <iostream>
35 # include <fstream>
36 
37 # include <mln/core/concept/image.hh>
38 # include <mln/core/routine/initialize.hh>
39 # include <mln/core/box_runstart_piter.hh>
40 # include <mln/core/pixel.hh>
41 # include <mln/data/memcpy_.hh>
42 # include <mln/util/array.hh>
43 
44 namespace mln
45 {
46 
47  namespace io
48  {
49 
50  namespace raw
51  {
52 
57  struct raw_header
58  {
59  unsigned dim;
60  std::string value_type;
62  };
63 
64 
69  raw_header get_header(const std::string& filename);
70 
71 
72 # ifndef MLN_INCLUDE_ONLY
73 
74 
75  raw_header get_header(const std::string& filename)
76  {
77  mln_trace("mln::io::raw::get_header");
78 
79  raw_header header;
80 
81  std::string info_filename = filename + ".info";
82 
83  std::ifstream info_file(info_filename.c_str());
84  if (! info_file)
85  {
86  std::cerr << "io::raw::get_header - Error: cannot open file '"
87  << filename << "'!"
88  << std::endl;
89  abort();
90  }
91 
92  std::string file_type;
93  info_file >> file_type;
94  if (file_type != "milena/raw")
95  {
96  std::cerr << "io::raw::load - Error: invalid file type. '"
97  << filename
98  << "' is NOT a valid milena/raw info file!"
99  << std::endl;
100  abort();
101  }
102 
103  char dev_null[30];
104 
105  // Dimension ?
106  // Reading line title "Dim: "
107  info_file.read(dev_null, 5);
108  info_file >> header.dim;
109 
110  // Size information - Skip it, useless.
111  header.size.resize(header.dim);
112  for (unsigned i = 0; i < header.dim; ++i)
113  info_file >> header.size[i];
114  // Skipping endline.
115  char c;
116  info_file.get(c);
117 
118 
119  // Value type name ?
120  // Reading line title "data type: "
121  info_file.read(dev_null, 11);
122  // WARNING: value type name limited to 255 characters...
123  char value_type[255];
124  info_file.getline(value_type, 255);
125  header.value_type = value_type;
126 
127  info_file.close();
128 
129  return header;
130  }
131 
132 
133 # endif // ! MLN_INCLUDE_ONLY
134 
135  } // end of namespace mln::io::raw
136 
137  } // end of namespace mln::io
138 
139 } // end of namespace mln
140 
141 #endif // ! MLN_IO_RAW_GET_HEADER_HH
142