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/*
 * Copyright (C) 2010 Tommi Maekitalo
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * As a special exception, you may use this file as part of a free
 * software library without restriction. Specifically, if other files
 * instantiate templates or use macros or inline functions from this
 * file, or you compile this file and link it with other files to
 * produce an executable, this file does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License. This exception does not however invalidate any other
 * reasons why the executable file might be covered by the GNU Library
 * General Public License.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef CXXTOOLS_TRIM_H
#define CXXTOOLS_TRIM_H

#include <string>

namespace cxxtools
{
  template <typename StringType>
  StringType ltrim(const StringType& s, const StringType& ws = StringType(" \t\r\n"))
  {
    typename StringType::size_type p = s.find_first_not_of(ws);
    return p == StringType::npos ? StringType() : s.substr(p);
  }

  template <typename StringType>
  StringType rtrim(const StringType& s, const StringType& ws = StringType(" \t\r\n"))
  {
    typename StringType::size_type p = s.find_last_not_of(ws);
    return p == StringType::npos ? StringType() : s.substr(0, p + 1);
  }

  template <typename StringType>
  StringType trim(const StringType& s, const StringType& ws = StringType(" \t\r\n"))
  {
    typename StringType::size_type pl = s.find_first_not_of(ws);

    if (pl == StringType::npos)
      return StringType();

    typename StringType::size_type pr = s.find_last_not_of(ws);

    return s.substr(pl, pr - pl + 1);
  }

}

#endif // CXXTOOLS_TRIM_H