You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
2.9 KiB
99 lines
2.9 KiB
4 years ago
|
/*
|
||
|
|
*
|
||
|
|
* Copyright (c) 1998-2002
|
||
|
|
* John Maddock
|
||
|
|
*
|
||
|
|
* Use, modification and distribution are subject to the
|
||
|
|
* Boost Software License, Version 1.0. (See accompanying file
|
||
|
|
* LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* LOCATION: see http://www.boost.org for most recent version.
|
||
|
|
* FILE regex_grep.hpp
|
||
|
|
* VERSION see <boost/version.hpp>
|
||
|
|
* DESCRIPTION: Provides regex_grep implementation.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef BOOST_REGEX_V5_REGEX_GREP_HPP
|
||
|
|
#define BOOST_REGEX_V5_REGEX_GREP_HPP
|
||
|
|
|
||
|
|
|
||
|
|
namespace boost{
|
||
|
|
|
||
|
|
//
|
||
|
|
// regex_grep:
|
||
|
|
// find all non-overlapping matches within the sequence first last:
|
||
|
|
//
|
||
|
|
template <class Predicate, class BidiIterator, class charT, class traits>
|
||
|
|
inline unsigned int regex_grep(Predicate foo,
|
||
|
|
BidiIterator first,
|
||
|
|
BidiIterator last,
|
||
|
|
const basic_regex<charT, traits>& e,
|
||
|
|
match_flag_type flags = match_default)
|
||
|
|
{
|
||
|
|
if(e.flags() & regex_constants::failbit)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
typedef typename match_results<BidiIterator>::allocator_type match_allocator_type;
|
||
|
|
|
||
|
|
match_results<BidiIterator> m;
|
||
|
|
BOOST_REGEX_DETAIL_NS::perl_matcher<BidiIterator, match_allocator_type, traits> matcher(first, last, m, e, flags, first);
|
||
|
|
unsigned int count = 0;
|
||
|
|
while(matcher.find())
|
||
|
|
{
|
||
|
|
++count;
|
||
|
|
if(0 == foo(m))
|
||
|
|
return count; // caller doesn't want to go on
|
||
|
|
if(m[0].second == last)
|
||
|
|
return count; // we've reached the end, don't try and find an extra null match.
|
||
|
|
if(m.length() == 0)
|
||
|
|
{
|
||
|
|
if(m[0].second == last)
|
||
|
|
return count;
|
||
|
|
// we found a NULL-match, now try to find
|
||
|
|
// a non-NULL one at the same position:
|
||
|
|
match_results<BidiIterator, match_allocator_type> m2(m);
|
||
|
|
matcher.setf(match_not_null | match_continuous);
|
||
|
|
if(matcher.find())
|
||
|
|
{
|
||
|
|
++count;
|
||
|
|
if(0 == foo(m))
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// reset match back to where it was:
|
||
|
|
m = m2;
|
||
|
|
}
|
||
|
|
matcher.unsetf((match_not_null | match_continuous) & ~flags);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// regex_grep convenience interfaces:
|
||
|
|
//
|
||
|
|
template <class Predicate, class charT, class traits>
|
||
|
|
inline unsigned int regex_grep(Predicate foo, const charT* str,
|
||
|
|
const basic_regex<charT, traits>& e,
|
||
|
|
match_flag_type flags = match_default)
|
||
|
|
{
|
||
|
|
return regex_grep(foo, str, str + traits::length(str), e, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <class Predicate, class ST, class SA, class charT, class traits>
|
||
|
|
inline unsigned int regex_grep(Predicate foo, const std::basic_string<charT, ST, SA>& s,
|
||
|
|
const basic_regex<charT, traits>& e,
|
||
|
|
match_flag_type flags = match_default)
|
||
|
|
{
|
||
|
|
return regex_grep(foo, s.begin(), s.end(), e, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#endif // BOOST_REGEX_V5_REGEX_GREP_HPP
|
||
|
|
|