src/util/regex/regex-backref-matcher.cpp

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2013-2015 Regents of the University of California.
 *
 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
 *
 * ndn-cxx 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 3 of the License, or (at your option) any later version.
 *
 * ndn-cxx 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 copies of the GNU General Public License and GNU Lesser
 * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
 */

#include "regex-backref-matcher.hpp"

#include "regex-pattern-list-matcher.hpp"

namespace ndn {

RegexBackrefMatcher::RegexBackrefMatcher(const std::string& expr,
                                         shared_ptr<RegexBackrefManager> backrefManager)
  : RegexMatcher(expr, EXPR_BACKREF, backrefManager)
{
}

RegexBackrefMatcher::~RegexBackrefMatcher()
{
}

void
RegexBackrefMatcher::lateCompile()
{
  compile();
}

void
RegexBackrefMatcher::compile()
{
  if (m_expr.size() < 2)
    throw Error("Unrecognized format: " + m_expr);

  size_t lastIndex = m_expr.size() - 1;
  if ('(' == m_expr[0] && ')' == m_expr[lastIndex]) {
    // m_backRefManager->pushRef(this);

    auto matcher = make_shared<RegexPatternListMatcher>(m_expr.substr(1, lastIndex - 1),
                                                        m_backrefManager);
    m_matchers.push_back(matcher);
  }
  else
    throw Error("Unrecognized format: " + m_expr);
}

} // namespace ndn