mirror of git://gcc.gnu.org/git/gcc.git
139 lines
4.2 KiB
C++
139 lines
4.2 KiB
C++
// 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>
|