139 lines
4.2 KiB
C++
139 lines
4.2 KiB
C++
// class template regex -*- C++ -*-
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// Copyright (C) 2010-2013 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/**
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* @file bits/regex_grep_matcher.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{regex}
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*/
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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template<typename _BiIter>
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class sub_match;
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template<typename _Bi_iter, typename _Allocator>
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class match_results;
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_GLIBCXX_END_NAMESPACE_VERSION
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namespace __detail
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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/**
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* @defgroup regex-detail Base and Implementation Classes
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* @ingroup regex
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* @{
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*/
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/// A _Results facade specialized for wrapping a templated match_results.
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template<typename _FwdIterT, typename _Alloc>
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class _SpecializedResults
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: public _Results
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{
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public:
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_SpecializedResults(const _Automaton::_SizeT __size,
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const _SpecializedCursor<_FwdIterT>& __cursor,
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match_results<_FwdIterT, _Alloc>& __m);
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void
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_M_set_pos(int __i, int __j, const _PatternCursor& __pc);
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void
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_M_set_matched(int __i, bool __is_matched)
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{ _M_results.at(__i).matched = __is_matched; }
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private:
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match_results<_FwdIterT, _Alloc>& _M_results;
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};
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template<typename _FwdIterT, typename _Alloc>
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_SpecializedResults<_FwdIterT, _Alloc>::
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_SpecializedResults(const _Automaton::_SizeT __size,
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const _SpecializedCursor<_FwdIterT>& __cursor,
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match_results<_FwdIterT, _Alloc>& __m)
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: _M_results(__m)
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{
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_M_results.clear();
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_M_results.reserve(__size + 2);
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_M_results.resize(__size);
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typename match_results<_FwdIterT, _Alloc>::value_type __sm;
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__sm.first = __sm.second = __cursor._M_begin();
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_M_results.push_back(__sm);
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__sm.first = __sm.second = __cursor._M_end();
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_M_results.push_back(__sm);
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}
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template<typename _FwdIterT, typename _Alloc>
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void
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_SpecializedResults<_FwdIterT, _Alloc>::
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_M_set_pos(int __i, int __j, const _PatternCursor& __pc)
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{
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typedef const _SpecializedCursor<_FwdIterT>& _CursorT;
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_CursorT __c = static_cast<_CursorT>(__pc);
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if (__j == 0)
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_M_results.at(__i).first = __c._M_pos();
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else
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_M_results.at(__i).second = __c._M_pos()+1;
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}
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/// A stack of states used in evaluating the NFA.
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typedef std::stack<_StateIdT, std::vector<_StateIdT> > _StateStack;
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/// Executes a regular expression NFA/DFA over a range using a
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/// variant of the parallel execution algorithm featured in the grep
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/// utility, modified to use Laurikari tags.
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class _Grep_matcher
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{
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public:
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_Grep_matcher(_PatternCursor& __p,
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_Results& __r,
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const _AutomatonPtr& __automaton,
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regex_constants::match_flag_type __flags);
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private:
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_StateSet
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_M_e_closure(_StateIdT __i);
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_StateSet
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_M_e_closure(const _StateSet& __s);
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_StateSet
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_M_e_closure(_StateStack& __stack, const _StateSet& __s);
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const std::shared_ptr<_Nfa> _M_nfa;
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_PatternCursor& _M_pattern;
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_Results& _M_results;
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};
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//@} regex-detail
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace __detail
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} // namespace std
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#include <bits/regex_grep_matcher.tcc>
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