file2Line.h

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#ifndef FILE_2_LINE_H
#define FILE_2_LINE_H

#include "typeUtils.h"
#include <fstream>
#include <iterator>


namespace VXV {
  template<class T> void File2Line(std::vector<std::vector<T> >& v,
                                   const char* fname) {
    std::ifstream from(fname);

    std::vector<T> line;
    int pre_x = 0, pre_y = 0;
    for (std::istream_iterator<int> it(from);
         it != std::istream_iterator<int>();) {
      int x = *it++;
      if (it == std::istream_iterator<int>()) {
        break;
      }
      int y = *it++;
      if (line.empty() || ((pre_x != x) || (pre_y != y))) {
        line.push_back(T(x, y));
      } else if (line.size() > 1) {
        v.push_back(line);
        line.clear();
      }
      pre_x = x;
      pre_y = y;
    }
  };
}

#endif /* !FILE_2_LINE_H */