667 lines
16 KiB
C++
667 lines
16 KiB
C++
// class template regex -*- C++ -*-
|
|
|
|
// Copyright (C) 2013-2017 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.tcc
|
|
* 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)
|
|
{
|
|
namespace __detail
|
|
{
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
// Result of merging regex_match and regex_search.
|
|
//
|
|
// __policy now can be _S_auto (auto dispatch) and _S_alternate (use
|
|
// the other one if possible, for test purpose).
|
|
//
|
|
// That __match_mode is true means regex_match, else regex_search.
|
|
template<typename _BiIter, typename _Alloc,
|
|
typename _CharT, typename _TraitsT,
|
|
_RegexExecutorPolicy __policy,
|
|
bool __match_mode>
|
|
bool
|
|
__regex_algo_impl(_BiIter __s,
|
|
_BiIter __e,
|
|
match_results<_BiIter, _Alloc>& __m,
|
|
const basic_regex<_CharT, _TraitsT>& __re,
|
|
regex_constants::match_flag_type __flags)
|
|
{
|
|
if (__re._M_automaton == nullptr)
|
|
return false;
|
|
|
|
typename match_results<_BiIter, _Alloc>::_Base_type& __res = __m;
|
|
__m._M_begin = __s;
|
|
__m._M_resize(__re._M_automaton->_M_sub_count());
|
|
for (auto& __it : __res)
|
|
__it.matched = false;
|
|
|
|
bool __ret;
|
|
if ((__re.flags() & regex_constants::__polynomial)
|
|
|| (__policy == _RegexExecutorPolicy::_S_alternate
|
|
&& !__re._M_automaton->_M_has_backref))
|
|
{
|
|
_Executor<_BiIter, _Alloc, _TraitsT, false>
|
|
__executor(__s, __e, __m, __re, __flags);
|
|
if (__match_mode)
|
|
__ret = __executor._M_match();
|
|
else
|
|
__ret = __executor._M_search();
|
|
}
|
|
else
|
|
{
|
|
_Executor<_BiIter, _Alloc, _TraitsT, true>
|
|
__executor(__s, __e, __m, __re, __flags);
|
|
if (__match_mode)
|
|
__ret = __executor._M_match();
|
|
else
|
|
__ret = __executor._M_search();
|
|
}
|
|
if (__ret)
|
|
{
|
|
for (auto& __it : __res)
|
|
if (!__it.matched)
|
|
__it.first = __it.second = __e;
|
|
auto& __pre = __m._M_prefix();
|
|
auto& __suf = __m._M_suffix();
|
|
if (__match_mode)
|
|
{
|
|
__pre.matched = false;
|
|
__pre.first = __s;
|
|
__pre.second = __s;
|
|
__suf.matched = false;
|
|
__suf.first = __e;
|
|
__suf.second = __e;
|
|
}
|
|
else
|
|
{
|
|
__pre.first = __s;
|
|
__pre.second = __res[0].first;
|
|
__pre.matched = (__pre.first != __pre.second);
|
|
__suf.first = __res[0].second;
|
|
__suf.second = __e;
|
|
__suf.matched = (__suf.first != __suf.second);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
__m._M_resize(0);
|
|
for (auto& __it : __res)
|
|
{
|
|
__it.matched = false;
|
|
__it.first = __it.second = __e;
|
|
}
|
|
}
|
|
return __ret;
|
|
}
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
}
|
|
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
template<typename _Ch_type>
|
|
template<typename _Fwd_iter>
|
|
typename regex_traits<_Ch_type>::string_type
|
|
regex_traits<_Ch_type>::
|
|
lookup_collatename(_Fwd_iter __first, _Fwd_iter __last) const
|
|
{
|
|
typedef std::ctype<char_type> __ctype_type;
|
|
const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale));
|
|
|
|
static const char* __collatenames[] =
|
|
{
|
|
"NUL",
|
|
"SOH",
|
|
"STX",
|
|
"ETX",
|
|
"EOT",
|
|
"ENQ",
|
|
"ACK",
|
|
"alert",
|
|
"backspace",
|
|
"tab",
|
|
"newline",
|
|
"vertical-tab",
|
|
"form-feed",
|
|
"carriage-return",
|
|
"SO",
|
|
"SI",
|
|
"DLE",
|
|
"DC1",
|
|
"DC2",
|
|
"DC3",
|
|
"DC4",
|
|
"NAK",
|
|
"SYN",
|
|
"ETB",
|
|
"CAN",
|
|
"EM",
|
|
"SUB",
|
|
"ESC",
|
|
"IS4",
|
|
"IS3",
|
|
"IS2",
|
|
"IS1",
|
|
"space",
|
|
"exclamation-mark",
|
|
"quotation-mark",
|
|
"number-sign",
|
|
"dollar-sign",
|
|
"percent-sign",
|
|
"ampersand",
|
|
"apostrophe",
|
|
"left-parenthesis",
|
|
"right-parenthesis",
|
|
"asterisk",
|
|
"plus-sign",
|
|
"comma",
|
|
"hyphen",
|
|
"period",
|
|
"slash",
|
|
"zero",
|
|
"one",
|
|
"two",
|
|
"three",
|
|
"four",
|
|
"five",
|
|
"six",
|
|
"seven",
|
|
"eight",
|
|
"nine",
|
|
"colon",
|
|
"semicolon",
|
|
"less-than-sign",
|
|
"equals-sign",
|
|
"greater-than-sign",
|
|
"question-mark",
|
|
"commercial-at",
|
|
"A",
|
|
"B",
|
|
"C",
|
|
"D",
|
|
"E",
|
|
"F",
|
|
"G",
|
|
"H",
|
|
"I",
|
|
"J",
|
|
"K",
|
|
"L",
|
|
"M",
|
|
"N",
|
|
"O",
|
|
"P",
|
|
"Q",
|
|
"R",
|
|
"S",
|
|
"T",
|
|
"U",
|
|
"V",
|
|
"W",
|
|
"X",
|
|
"Y",
|
|
"Z",
|
|
"left-square-bracket",
|
|
"backslash",
|
|
"right-square-bracket",
|
|
"circumflex",
|
|
"underscore",
|
|
"grave-accent",
|
|
"a",
|
|
"b",
|
|
"c",
|
|
"d",
|
|
"e",
|
|
"f",
|
|
"g",
|
|
"h",
|
|
"i",
|
|
"j",
|
|
"k",
|
|
"l",
|
|
"m",
|
|
"n",
|
|
"o",
|
|
"p",
|
|
"q",
|
|
"r",
|
|
"s",
|
|
"t",
|
|
"u",
|
|
"v",
|
|
"w",
|
|
"x",
|
|
"y",
|
|
"z",
|
|
"left-curly-bracket",
|
|
"vertical-line",
|
|
"right-curly-bracket",
|
|
"tilde",
|
|
"DEL",
|
|
};
|
|
|
|
string __s;
|
|
for (; __first != __last; ++__first)
|
|
__s += __fctyp.narrow(*__first, 0);
|
|
|
|
for (const auto& __it : __collatenames)
|
|
if (__s == __it)
|
|
return string_type(1, __fctyp.widen(
|
|
static_cast<char>(&__it - __collatenames)));
|
|
|
|
// TODO Add digraph support:
|
|
// http://boost.sourceforge.net/libs/regex/doc/collating_names.html
|
|
|
|
return string_type();
|
|
}
|
|
|
|
template<typename _Ch_type>
|
|
template<typename _Fwd_iter>
|
|
typename regex_traits<_Ch_type>::char_class_type
|
|
regex_traits<_Ch_type>::
|
|
lookup_classname(_Fwd_iter __first, _Fwd_iter __last, bool __icase) const
|
|
{
|
|
typedef std::ctype<char_type> __ctype_type;
|
|
const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale));
|
|
|
|
// Mappings from class name to class mask.
|
|
static const pair<const char*, char_class_type> __classnames[] =
|
|
{
|
|
{"d", ctype_base::digit},
|
|
{"w", {ctype_base::alnum, _RegexMask::_S_under}},
|
|
{"s", ctype_base::space},
|
|
{"alnum", ctype_base::alnum},
|
|
{"alpha", ctype_base::alpha},
|
|
{"blank", ctype_base::blank},
|
|
{"cntrl", ctype_base::cntrl},
|
|
{"digit", ctype_base::digit},
|
|
{"graph", ctype_base::graph},
|
|
{"lower", ctype_base::lower},
|
|
{"print", ctype_base::print},
|
|
{"punct", ctype_base::punct},
|
|
{"space", ctype_base::space},
|
|
{"upper", ctype_base::upper},
|
|
{"xdigit", ctype_base::xdigit},
|
|
};
|
|
|
|
string __s;
|
|
for (; __first != __last; ++__first)
|
|
__s += __fctyp.narrow(__fctyp.tolower(*__first), 0);
|
|
|
|
for (const auto& __it : __classnames)
|
|
if (__s == __it.first)
|
|
{
|
|
if (__icase
|
|
&& ((__it.second
|
|
& (ctype_base::lower | ctype_base::upper)) != 0))
|
|
return ctype_base::alpha;
|
|
return __it.second;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
template<typename _Ch_type>
|
|
bool
|
|
regex_traits<_Ch_type>::
|
|
isctype(_Ch_type __c, char_class_type __f) const
|
|
{
|
|
typedef std::ctype<char_type> __ctype_type;
|
|
const __ctype_type& __fctyp(use_facet<__ctype_type>(_M_locale));
|
|
|
|
return __fctyp.is(__f._M_base, __c)
|
|
// [[:w:]]
|
|
|| ((__f._M_extended & _RegexMask::_S_under)
|
|
&& __c == __fctyp.widen('_'));
|
|
}
|
|
|
|
template<typename _Ch_type>
|
|
int
|
|
regex_traits<_Ch_type>::
|
|
value(_Ch_type __ch, int __radix) const
|
|
{
|
|
std::basic_istringstream<char_type> __is(string_type(1, __ch));
|
|
long __v;
|
|
if (__radix == 8)
|
|
__is >> std::oct;
|
|
else if (__radix == 16)
|
|
__is >> std::hex;
|
|
__is >> __v;
|
|
return __is.fail() ? -1 : __v;
|
|
}
|
|
|
|
template<typename _Bi_iter, typename _Alloc>
|
|
template<typename _Out_iter>
|
|
_Out_iter match_results<_Bi_iter, _Alloc>::
|
|
format(_Out_iter __out,
|
|
const match_results<_Bi_iter, _Alloc>::char_type* __fmt_first,
|
|
const match_results<_Bi_iter, _Alloc>::char_type* __fmt_last,
|
|
match_flag_type __flags) const
|
|
{
|
|
__glibcxx_assert( ready() );
|
|
regex_traits<char_type> __traits;
|
|
typedef std::ctype<char_type> __ctype_type;
|
|
const __ctype_type&
|
|
__fctyp(use_facet<__ctype_type>(__traits.getloc()));
|
|
|
|
auto __output = [&](size_t __idx)
|
|
{
|
|
auto& __sub = (*this)[__idx];
|
|
if (__sub.matched)
|
|
__out = std::copy(__sub.first, __sub.second, __out);
|
|
};
|
|
|
|
if (__flags & regex_constants::format_sed)
|
|
{
|
|
for (; __fmt_first != __fmt_last;)
|
|
if (*__fmt_first == '&')
|
|
{
|
|
__output(0);
|
|
++__fmt_first;
|
|
}
|
|
else if (*__fmt_first == '\\')
|
|
{
|
|
if (++__fmt_first != __fmt_last
|
|
&& __fctyp.is(__ctype_type::digit, *__fmt_first))
|
|
__output(__traits.value(*__fmt_first++, 10));
|
|
else
|
|
*__out++ = '\\';
|
|
}
|
|
else
|
|
*__out++ = *__fmt_first++;
|
|
}
|
|
else
|
|
{
|
|
while (1)
|
|
{
|
|
auto __next = std::find(__fmt_first, __fmt_last, '$');
|
|
if (__next == __fmt_last)
|
|
break;
|
|
|
|
__out = std::copy(__fmt_first, __next, __out);
|
|
|
|
auto __eat = [&](char __ch) -> bool
|
|
{
|
|
if (*__next == __ch)
|
|
{
|
|
++__next;
|
|
return true;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
if (++__next == __fmt_last)
|
|
*__out++ = '$';
|
|
else if (__eat('$'))
|
|
*__out++ = '$';
|
|
else if (__eat('&'))
|
|
__output(0);
|
|
else if (__eat('`'))
|
|
{
|
|
auto& __sub = _M_prefix();
|
|
if (__sub.matched)
|
|
__out = std::copy(__sub.first, __sub.second, __out);
|
|
}
|
|
else if (__eat('\''))
|
|
{
|
|
auto& __sub = _M_suffix();
|
|
if (__sub.matched)
|
|
__out = std::copy(__sub.first, __sub.second, __out);
|
|
}
|
|
else if (__fctyp.is(__ctype_type::digit, *__next))
|
|
{
|
|
long __num = __traits.value(*__next, 10);
|
|
if (++__next != __fmt_last
|
|
&& __fctyp.is(__ctype_type::digit, *__next))
|
|
{
|
|
__num *= 10;
|
|
__num += __traits.value(*__next++, 10);
|
|
}
|
|
if (0 <= __num && __num < this->size())
|
|
__output(__num);
|
|
}
|
|
else
|
|
*__out++ = '$';
|
|
__fmt_first = __next;
|
|
}
|
|
__out = std::copy(__fmt_first, __fmt_last, __out);
|
|
}
|
|
return __out;
|
|
}
|
|
|
|
template<typename _Out_iter, typename _Bi_iter,
|
|
typename _Rx_traits, typename _Ch_type>
|
|
_Out_iter
|
|
regex_replace(_Out_iter __out, _Bi_iter __first, _Bi_iter __last,
|
|
const basic_regex<_Ch_type, _Rx_traits>& __e,
|
|
const _Ch_type* __fmt,
|
|
regex_constants::match_flag_type __flags)
|
|
{
|
|
typedef regex_iterator<_Bi_iter, _Ch_type, _Rx_traits> _IterT;
|
|
_IterT __i(__first, __last, __e, __flags);
|
|
_IterT __end;
|
|
if (__i == __end)
|
|
{
|
|
if (!(__flags & regex_constants::format_no_copy))
|
|
__out = std::copy(__first, __last, __out);
|
|
}
|
|
else
|
|
{
|
|
sub_match<_Bi_iter> __last;
|
|
auto __len = char_traits<_Ch_type>::length(__fmt);
|
|
for (; __i != __end; ++__i)
|
|
{
|
|
if (!(__flags & regex_constants::format_no_copy))
|
|
__out = std::copy(__i->prefix().first, __i->prefix().second,
|
|
__out);
|
|
__out = __i->format(__out, __fmt, __fmt + __len, __flags);
|
|
__last = __i->suffix();
|
|
if (__flags & regex_constants::format_first_only)
|
|
break;
|
|
}
|
|
if (!(__flags & regex_constants::format_no_copy))
|
|
__out = std::copy(__last.first, __last.second, __out);
|
|
}
|
|
return __out;
|
|
}
|
|
|
|
template<typename _Bi_iter,
|
|
typename _Ch_type,
|
|
typename _Rx_traits>
|
|
bool
|
|
regex_iterator<_Bi_iter, _Ch_type, _Rx_traits>::
|
|
operator==(const regex_iterator& __rhs) const
|
|
{
|
|
if (_M_pregex == nullptr && __rhs._M_pregex == nullptr)
|
|
return true;
|
|
return _M_pregex == __rhs._M_pregex
|
|
&& _M_begin == __rhs._M_begin
|
|
&& _M_end == __rhs._M_end
|
|
&& _M_flags == __rhs._M_flags
|
|
&& _M_match[0] == __rhs._M_match[0];
|
|
}
|
|
|
|
template<typename _Bi_iter,
|
|
typename _Ch_type,
|
|
typename _Rx_traits>
|
|
regex_iterator<_Bi_iter, _Ch_type, _Rx_traits>&
|
|
regex_iterator<_Bi_iter, _Ch_type, _Rx_traits>::
|
|
operator++()
|
|
{
|
|
// In all cases in which the call to regex_search returns true,
|
|
// match.prefix().first shall be equal to the previous value of
|
|
// match[0].second, and for each index i in the half-open range
|
|
// [0, match.size()) for which match[i].matched is true,
|
|
// match[i].position() shall return distance(begin, match[i].first).
|
|
// [28.12.1.4.5]
|
|
if (_M_match[0].matched)
|
|
{
|
|
auto __start = _M_match[0].second;
|
|
auto __prefix_first = _M_match[0].second;
|
|
if (_M_match[0].first == _M_match[0].second)
|
|
{
|
|
if (__start == _M_end)
|
|
{
|
|
_M_pregex = nullptr;
|
|
return *this;
|
|
}
|
|
else
|
|
{
|
|
if (regex_search(__start, _M_end, _M_match, *_M_pregex,
|
|
_M_flags
|
|
| regex_constants::match_not_null
|
|
| regex_constants::match_continuous))
|
|
{
|
|
__glibcxx_assert(_M_match[0].matched);
|
|
auto& __prefix = _M_match._M_prefix();
|
|
__prefix.first = __prefix_first;
|
|
__prefix.matched = __prefix.first != __prefix.second;
|
|
// [28.12.1.4.5]
|
|
_M_match._M_begin = _M_begin;
|
|
return *this;
|
|
}
|
|
else
|
|
++__start;
|
|
}
|
|
}
|
|
_M_flags |= regex_constants::match_prev_avail;
|
|
if (regex_search(__start, _M_end, _M_match, *_M_pregex, _M_flags))
|
|
{
|
|
__glibcxx_assert(_M_match[0].matched);
|
|
auto& __prefix = _M_match._M_prefix();
|
|
__prefix.first = __prefix_first;
|
|
__prefix.matched = __prefix.first != __prefix.second;
|
|
// [28.12.1.4.5]
|
|
_M_match._M_begin = _M_begin;
|
|
}
|
|
else
|
|
_M_pregex = nullptr;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template<typename _Bi_iter,
|
|
typename _Ch_type,
|
|
typename _Rx_traits>
|
|
regex_token_iterator<_Bi_iter, _Ch_type, _Rx_traits>&
|
|
regex_token_iterator<_Bi_iter, _Ch_type, _Rx_traits>::
|
|
operator=(const regex_token_iterator& __rhs)
|
|
{
|
|
_M_position = __rhs._M_position;
|
|
_M_subs = __rhs._M_subs;
|
|
_M_n = __rhs._M_n;
|
|
_M_suffix = __rhs._M_suffix;
|
|
_M_has_m1 = __rhs._M_has_m1;
|
|
_M_normalize_result();
|
|
return *this;
|
|
}
|
|
|
|
template<typename _Bi_iter,
|
|
typename _Ch_type,
|
|
typename _Rx_traits>
|
|
bool
|
|
regex_token_iterator<_Bi_iter, _Ch_type, _Rx_traits>::
|
|
operator==(const regex_token_iterator& __rhs) const
|
|
{
|
|
if (_M_end_of_seq() && __rhs._M_end_of_seq())
|
|
return true;
|
|
if (_M_suffix.matched && __rhs._M_suffix.matched
|
|
&& _M_suffix == __rhs._M_suffix)
|
|
return true;
|
|
if (_M_end_of_seq() || _M_suffix.matched
|
|
|| __rhs._M_end_of_seq() || __rhs._M_suffix.matched)
|
|
return false;
|
|
return _M_position == __rhs._M_position
|
|
&& _M_n == __rhs._M_n
|
|
&& _M_subs == __rhs._M_subs;
|
|
}
|
|
|
|
template<typename _Bi_iter,
|
|
typename _Ch_type,
|
|
typename _Rx_traits>
|
|
regex_token_iterator<_Bi_iter, _Ch_type, _Rx_traits>&
|
|
regex_token_iterator<_Bi_iter, _Ch_type, _Rx_traits>::
|
|
operator++()
|
|
{
|
|
_Position __prev = _M_position;
|
|
if (_M_suffix.matched)
|
|
*this = regex_token_iterator();
|
|
else if (_M_n + 1 < _M_subs.size())
|
|
{
|
|
_M_n++;
|
|
_M_result = &_M_current_match();
|
|
}
|
|
else
|
|
{
|
|
_M_n = 0;
|
|
++_M_position;
|
|
if (_M_position != _Position())
|
|
_M_result = &_M_current_match();
|
|
else if (_M_has_m1 && __prev->suffix().length() != 0)
|
|
{
|
|
_M_suffix.matched = true;
|
|
_M_suffix.first = __prev->suffix().first;
|
|
_M_suffix.second = __prev->suffix().second;
|
|
_M_result = &_M_suffix;
|
|
}
|
|
else
|
|
*this = regex_token_iterator();
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template<typename _Bi_iter,
|
|
typename _Ch_type,
|
|
typename _Rx_traits>
|
|
void
|
|
regex_token_iterator<_Bi_iter, _Ch_type, _Rx_traits>::
|
|
_M_init(_Bi_iter __a, _Bi_iter __b)
|
|
{
|
|
_M_has_m1 = false;
|
|
for (auto __it : _M_subs)
|
|
if (__it == -1)
|
|
{
|
|
_M_has_m1 = true;
|
|
break;
|
|
}
|
|
if (_M_position != _Position())
|
|
_M_result = &_M_current_match();
|
|
else if (_M_has_m1)
|
|
{
|
|
_M_suffix.matched = true;
|
|
_M_suffix.first = __a;
|
|
_M_suffix.second = __b;
|
|
_M_result = &_M_suffix;
|
|
}
|
|
else
|
|
_M_result = nullptr;
|
|
}
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace
|
|
|