file_io.hpp

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namespace pcl
{

#ifndef _WIN32
  void getAllPcdFilesInDirectory(const std::string& directory, std::vector<std::string>& file_names)
  {
    DIR *dp;
    struct dirent *dirp;
    if((dp  = opendir(directory.c_str())) == NULL) {
      std::cerr << "Could not open directory.\n";
      return;
    }
    while ((dirp = readdir(dp)) != NULL) {
      if (dirp->d_type == DT_REG)  // Only regular files
      {
        std::string file_name = dirp->d_name;
        if (file_name.substr(file_name.size()-4, 4)==".pcd")
          file_names.push_back(dirp->d_name);
      }
    }
    closedir(dp);
    std::sort(file_names.begin(), file_names.end());
    //for (unsigned int i=0; i<file_names.size(); ++i)
      //cout << file_names[i]<<"\n";
  }
#endif

std::string getFilenameWithoutPath(const std::string& input)
{
  size_t filename_start = input.find_last_of('/', static_cast<size_t>(-1)) + 1;
  return input.substr(filename_start, input.size()-filename_start);
}

std::string getFilenameWithoutExtension(const std::string& input)
{
  size_t dot_position = input.find_last_of('.', input.size());
  return input.substr(0, dot_position);
}

std::string getFileExtension(const std::string& input)
{
  size_t dot_position = input.find_last_of('.', input.size());
  return input.substr(dot_position+1, input.size());
}

}  // namespace end