itkFDFCommonImageIO.cxx

/*  Copyright (C) 2004 Glenn Pierce.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "itkFDFCommonImageIO.h"

// Remove a particular type of character from a string
void RemoveCharacters(std::string &line, std::string character)
{
  std::string::size_type characterPosition = line.find_first_of(character, 0);
  while ( characterPosition != std::string::npos )
    {
    line.erase(characterPosition, 1);
    characterPosition = line.find_first_of(character, characterPosition);
    }
}

void Tokenize(const std::string& str, std::vector<std::string>& tokens, const std::string& delimiters)
{
  // Skip delimiters at beginning.
  std::string::size_type lastPos = str.find_first_not_of(delimiters, 0);
  // Find first "non-delimiter".
  std::string::size_type pos = str.find_first_of(delimiters, lastPos);

  while (std::string::npos != pos || std::string::npos != lastPos)
    {
    // Found a token, add it to the vector.
    tokens.push_back(str.substr(lastPos, pos - lastPos));
    // Skip delimiters.  Note the "not_of"
    lastPos = str.find_first_not_of(delimiters, pos);
    // Find next "non-delimiter"
    pos = str.find_first_of(delimiters, lastPos);
    }
}

std::string ParseLine(std::string line)
{
  // strip *
  RemoveCharacters(line, "*");
  RemoveCharacters(line, "\"");
  RemoveCharacters(line, "[");
  RemoveCharacters(line, "]");

  // Need to deal with space between {}
  std::string::size_type startBracketPosition = line.find_first_of("{", 0);
  std::string::size_type endBracketPosition = line.find_first_of("}", startBracketPosition);

  if ( startBracketPosition != std::string::npos && endBracketPosition != std::string::npos)
    {
    std::string element = line.substr(startBracketPosition, endBracketPosition - startBracketPosition);

    // Find whitespace within {} and erase
    std::string::size_type whiteSpacePosition = line.find_first_of(" ", startBracketPosition);

    while (whiteSpacePosition != std::string::npos)
      {
      line.erase(whiteSpacePosition, 1);
      whiteSpacePosition = line.find_first_of(" ", whiteSpacePosition);
      }
    }

  return line;
}