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tokenizer.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 */

#include "common/tokenizer.h"

namespace Common {

00029 StringTokenizer::StringTokenizer(const String &str, const String &delimiters) : _str(str), _delimiters(delimiters) {
      reset();
}

00033 void StringTokenizer::reset() {
      _tokenBegin = _tokenEnd = 0;
}

00037 bool StringTokenizer::empty() const {
      // Search for the next token's start (i.e. the next non-delimiter character)
      for (uint i = _tokenEnd; i < _str.size(); i++) {
            if (!_delimiters.contains(_str[i]))
                  return false; // Found a token so the tokenizer is not empty
      }
      // Didn't find any more tokens so the tokenizer is empty
      return true;
}

00047 String StringTokenizer::nextToken() {
      // Seek to next token's start (i.e. jump over the delimiters before next token)
      for (_tokenBegin = _tokenEnd; _tokenBegin < _str.size() && _delimiters.contains(_str[_tokenBegin]); _tokenBegin++)
            ;
      // Seek to the token's end (i.e. jump over the non-delimiters)
      for (_tokenEnd = _tokenBegin; _tokenEnd < _str.size() && !_delimiters.contains(_str[_tokenEnd]); _tokenEnd++)
            ;
      // Return the found token
      return String(_str.c_str() + _tokenBegin, _tokenEnd - _tokenBegin);
}

} // End of namespace Common


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