text: /*
   * Software License Agreement (BSD License)
   *
   *  Point Cloud Library (PCL) - www.pointclouds.org
   *  Copyright (c) 2007-2012, Ares Lagae
   *  Copyright (c) 2012, Willow Garage, Inc.
   *  All rights reserved.
   *
   *  Redistribution and use in source and binary forms, with or without
   *  modification, are permitted provided that the following conditions
   *  are met:
   *
   *   * Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *   * Redistributions in binary form must reproduce the above
   *     copyright notice, this list of conditions and the following
   *     disclaimer in the documentation and/or other materials provided
   *     with the distribution.
   *   * Neither the name of Willow Garage, Inc. nor the names of its
   *     contributors may be used to endorse or promote products derived
   *     from this software without specific prior written permission.
   *
   *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   *  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   *  POSSIBILITY OF SUCH DAMAGE.
   *	
   * $Id$
   *
   */
  
  #include <fstream>
  #include <iostream>
  #include <string.h>
  #include <string>
  #include <stdlib.h>
  
  /** \file plheader extracts and prints out the header of a PLY file
    * 
    * \author Ares Lagae
    * \ingroup io
    */
  int main (int argc, char* argv[])
  {
    int argi;
    for (argi = 1; argi < argc; ++argi) {
  
      if (argv[argi][0] != '-') {
        break;
      }
      if (argv[argi][1] == 0) {
        ++argi;
        break;
      }
      char short_opt, *long_opt, *opt_arg;
      if (argv[argi][1] != '-') {
        short_opt = argv[argi][1];
        opt_arg = &argv[argi][2];
        long_opt = &argv[argi][2];
        while (*long_opt != '\0') {
          ++long_opt;
        }
      }
      else {
        short_opt = 0;
        long_opt = &argv[argi][2];
        opt_arg = long_opt;
        while ((*opt_arg != '=') && (*opt_arg != '\0')) {
          ++opt_arg;
        }
        if (*opt_arg == '=') {
          *opt_arg++ = '\0';
        }
      }
  
      if ((short_opt == 'h') || (strcmp (long_opt, "help") == 0)) {
        std::cout << "Usage: plyheader [OPTION] [[INFILE] OUTFILE]\n";
        std::cout << "Extract the header from a PLY file.\n";
        std::cout << "\n";
        std::cout << "  -h, --help       display this help and exit\n";
        std::cout << "  -v, --version    output version information and exit\n";
        std::cout << "\n";
        std::cout << "With no INFILE/OUTFILE, or when INFILE/OUTFILE is -, read standard input/output.\n";
        std::cout << "\n";
        std::cout << "Report bugs to <www.pointclouds.org/issues>.\n";
        return EXIT_SUCCESS;
      }
  
      else if ((short_opt == 'v') || (strcmp (long_opt, "version") == 0)) {
        std::cout << "plyheader \n";
        std::cout << " Point Cloud Library (PCL) - www.pointclouds.org\n";
        std::cout << " Copyright (c) 2007-2012, Ares Lagae\n";
        std::cout << " Copyright (c) 2012, Willow Garage, Inc.\n";
        std::cout << " All rights reserved.\n";
        std::cout << " Redistribution and use in source and binary forms, with or without\n";
        std::cout << " modification, are permitted provided that the following conditions\n";
        std::cout << " are met:\n";
        std::cout << "  * Redistributions of source code must retain the above copyright\n";
        std::cout << "    notice, this list of conditions and the following disclaimer.\n";
        std::cout << "  * Redistributions in binary form must reproduce the above\n";
        std::cout << "    copyright notice, this list of conditions and the following\n";
        std::cout << "    disclaimer in the documentation and/or other materials provided\n";
        std::cout << "    with the distribution.\n";
        std::cout << "  * Neither the name of Willow Garage, Inc. nor the names of its\n";
        std::cout << "    contributors may be used to endorse or promote products derived\n";
        std::cout << "    from this software without specific prior written permission.\n";
        std::cout << " THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n";
        std::cout << " \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n";
        std::cout << " LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS\n";
        std::cout << " FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE\n";
        std::cout << " COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,\n";
        std::cout << " INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,\n";
        std::cout << " BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n";
        std::cout << " LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER\n";
        std::cout << " CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\n";
        std::cout << " LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN\n";
        std::cout << " ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\n";
        std::cout << " POSSIBILITY OF SUCH DAMAGE.\n";
        return EXIT_SUCCESS;
      }
  
      else {
        std::cerr << "plyheader: " << "invalid option `" << argv[argi] << "'" << "\n";
        std::cerr << "Try `" << argv[0] << " --help' for more information.\n";
        return EXIT_FAILURE;
      }
    }
  
    int parc = argc - argi;
    char** parv = argv + argi;
    if (parc > 2) {
      std::cerr << "plyheader: " << "too many parameters" << "\n";
      std::cerr << "Try `" << argv[0] << " --help' for more information.\n";
      return EXIT_FAILURE;
    }
  
    std::ifstream ifstream;
    const char* ifilename = "";
    if (parc > 0) {
      ifilename = parv[0];
      if (strcmp (ifilename, "-") != 0) {
        ifstream.open (ifilename);
        if (!ifstream.is_open ()) {
          std::cerr << "plyheader: " << ifilename << ": " << "no such file or directory" << "\n";
          return EXIT_FAILURE;
        }
      }
    }
  
    std::ofstream ofstream;
    const char* ofilename = "";
    if (parc > 1) {
      ofilename = parv[1];
      if (strcmp (ofilename, "-") != 0) {
        ofstream.open (ofilename);
        if (!ofstream.is_open ()) {
          std::cerr << "plyheader: " << ofilename << ": " << "could not open file" << "\n";
          return EXIT_FAILURE;
        }
      }
    }
  
    std::istream& istream = ifstream.is_open () ? ifstream : std::cin;
    std::ostream& ostream = ofstream.is_open () ? ofstream : std::cout;
  
    char magic[3];
    istream.read (magic, 3);
    if (!istream || (magic[0] != 'p') || (magic[1] != 'l') || (magic[2] != 'y')){
      return EXIT_FAILURE;
    }
    istream.ignore (1);
    ostream << magic[0] << magic[1] << magic[2] << "\n";
    std::string line;
    while (std::getline (istream, line)) {
      ostream << line << "\n";
      if (line == "end_header") {
        break;
      }
    }
    return istream ? EXIT_SUCCESS : EXIT_FAILURE;
  }
  