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// class template regex -*- C++ -*-

// Copyright (C) 2010, 2011, 2012 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library 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 3, or (at your option)

// any later version.

// 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 General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.

/**

 *  @file bits/regex_grep_matcher.h

 *  This is an internal header file, included by other library headers.

 *  Do not attempt to use it directly. @headername{regex}

 */

namespace std _GLIBCXX_VISIBILITY(default)

{

_GLIBCXX_BEGIN_NAMESPACE_VERSION

  template<typename _BiIter>

    class sub_match;

  template<typename _Bi_iter, typename _Allocator>

    class match_results;

_GLIBCXX_END_NAMESPACE_VERSION

namespace __detail

{

_GLIBCXX_BEGIN_NAMESPACE_VERSION

  /**

   *  @defgroup regex-detail Base and Implementation Classes

   *  @ingroup regex

   *  @{

   */

  /// A _Results facade specialized for wrapping a templated match_results.

  template<typename _FwdIterT, typename _Alloc>

    class _SpecializedResults

    : public _Results

    {

    public:

      _SpecializedResults(const _Automaton::_SizeT __size,

                          const _SpecializedCursor<_FwdIterT>& __cursor,

                          match_results<_FwdIterT, _Alloc>& __m);

      void

      _M_set_pos(int __i, int __j, const _PatternCursor& __pc);

      void

      _M_set_matched(int __i, bool __is_matched)

      { _M_results.at(__i).matched = __is_matched; }

    private:

      match_results<_FwdIterT, _Alloc>& _M_results;

    };

  template<typename _FwdIterT, typename _Alloc>

    _SpecializedResults<_FwdIterT, _Alloc>::

    _SpecializedResults(const _Automaton::_SizeT __size,

                        const _SpecializedCursor<_FwdIterT>& __cursor,

                        match_results<_FwdIterT, _Alloc>& __m)

    : _M_results(__m)

    {

      _M_results.clear();

      _M_results.reserve(__size + 2);

      _M_results.resize(__size);

      typename match_results<_FwdIterT, _Alloc>::value_type __sm;

      __sm.first = __sm.second = __cursor._M_begin();

      _M_results.push_back(__sm);

      __sm.first = __sm.second = __cursor._M_end();

      _M_results.push_back(__sm);

    }

  template<typename _FwdIterT, typename _Alloc>

    void

    _SpecializedResults<_FwdIterT, _Alloc>::

    _M_set_pos(int __i, int __j, const _PatternCursor& __pc)

    {

      typedef const _SpecializedCursor<_FwdIterT>& _CursorT;

      _CursorT __c = static_cast<_CursorT>(__pc);

      if (__j == 0)

        _M_results.at(__i).first = __c._M_pos();

      else

        _M_results.at(__i).second = __c._M_pos()+1;

    }

  /// A stack of states used in evaluating the NFA.

  typedef std::stack<_StateIdT, std::vector<_StateIdT> > _StateStack;

  /// Executes a regular expression NFA/DFA over a range using a

  /// variant of the parallel execution algorithm featured in the grep

  /// utility, modified to use Laurikari tags.

  class _Grep_matcher

  {

  public:

    _Grep_matcher(_PatternCursor&                   __p,

                  _Results&                         __r,

                  const _AutomatonPtr&              __automaton,

                  regex_constants::match_flag_type  __flags);

  private:

    _StateSet

    _M_e_closure(_StateIdT __i);

    _StateSet

    _M_e_closure(const _StateSet& __s);

    _StateSet

    _M_e_closure(_StateStack& __stack, const _StateSet& __s);

    const std::shared_ptr<_Nfa>        _M_nfa;

    _PatternCursor&                    _M_pattern;

    _Results&                          _M_results;

  };

 //@} regex-detail

_GLIBCXX_END_NAMESPACE_VERSION

} // namespace __detail

} // namespace std

#include <bits/regex_grep_matcher.tcc>