/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <log4cxx/helpers/stringtokenizer.h>

#include <log4cxx/helpers/exception.h>

using namespace LOG4CXX_NS;

using namespace LOG4CXX_NS::helpers;

struct StringTokenizer::StringTokenizerPrivate{

  StringTokenizerPrivate(const LogString& str, const LogString& delim1) : src(str), delim(delim1), pos(0){}

  LogString src;

  LogString delim;

  LogString::size_type pos;

};

StringTokenizer::StringTokenizer(const LogString& str, const LogString& delim1)

  : m_priv(std::make_unique<StringTokenizerPrivate>(str, delim1))

{

}

StringTokenizer::~StringTokenizer()

{

}

bool StringTokenizer::hasMoreTokens() const

{

  return (m_priv->pos != LogString::npos

      && m_priv->src.find_first_not_of(m_priv->delim, m_priv->pos) != LogString::npos);

}

LogString StringTokenizer::nextToken()

{

  if (m_priv->pos != LogString::npos)

  {

    size_t nextPos = m_priv->src.find_first_not_of(m_priv->delim, m_priv->pos);

    if (nextPos != LogString::npos)

    {

      m_priv->pos = m_priv->src.find_first_of(m_priv->delim, nextPos);

      if (m_priv->pos == LogString::npos)

      {

        return m_priv->src.substr(nextPos);

      }

      return m_priv->src.substr(nextPos, m_priv->pos - nextPos);

    }

  }

  throw NoSuchElementException();

#if LOG4CXX_RETURN_AFTER_THROW

  return LogString();

#endif

}