-/*

- *

- * Copyright (c) 2003

- * 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 u32regex_iterator.hpp

- * VERSION see <boost/version.hpp>

- * DESCRIPTION: Provides u32regex_iterator implementation.

- */

-

-#ifndef BOOST_REGEX_V4_U32REGEX_ITERATOR_HPP

-#define BOOST_REGEX_V4_U32REGEX_ITERATOR_HPP

-

-namespace boost{

-

-#ifdef BOOST_HAS_ABI_HEADERS

-# include BOOST_ABI_PREFIX

-#endif

-

-template <class BidirectionalIterator>

-class u32regex_iterator_implementation

-{

- typedef u32regex regex_type;

-

- match_results<BidirectionalIterator> what; // current match

- BidirectionalIterator base; // start of sequence

- BidirectionalIterator end; // end of sequence

- const regex_type re; // the expression

- match_flag_type flags; // flags for matching

-

-public:

- u32regex_iterator_implementation(const regex_type* p, BidirectionalIterator last, match_flag_type f)

- : base(), end(last), re(*p), flags(f){}

- bool init(BidirectionalIterator first)

- {

- base = first;

- return u32regex_search(first, end, what, re, flags, base);

- }

- bool compare(const u32regex_iterator_implementation& that)

- {

- if(this == &that) return true;

- return (&re.get_data() == &that.re.get_data()) && (end == that.end) && (flags == that.flags) && (what[0].first == that.what[0].first) && (what[0].second == that.what[0].second);

- }

- const match_results<BidirectionalIterator>& get()

- { return what; }

- bool next()

- {

- //if(what.prefix().first != what[0].second)

- // flags |= match_prev_avail;

- BidirectionalIterator next_start = what[0].second;

- match_flag_type f(flags);

- if(!what.length())

- f |= regex_constants::match_not_initial_null;

- //if(base != next_start)

- // f |= regex_constants::match_not_bob;

- bool result = u32regex_search(next_start, end, what, re, f, base);

- if(result)

- what.set_base(base);

- return result;

- }

-private:

- u32regex_iterator_implementation& operator=(const u32regex_iterator_implementation&);

-};

-

-template <class BidirectionalIterator>

-class u32regex_iterator

-#ifndef BOOST_NO_STD_ITERATOR

- : public std::iterator<

- std::forward_iterator_tag,

- match_results<BidirectionalIterator>,

- typename re_detail::regex_iterator_traits<BidirectionalIterator>::difference_type,

- const match_results<BidirectionalIterator>*,

- const match_results<BidirectionalIterator>& >

-#endif

-{

-private:

- typedef u32regex_iterator_implementation<BidirectionalIterator> impl;

- typedef shared_ptr<impl> pimpl;

-public:

- typedef u32regex regex_type;

- typedef match_results<BidirectionalIterator> value_type;

- typedef typename re_detail::regex_iterator_traits<BidirectionalIterator>::difference_type

- difference_type;

- typedef const value_type* pointer;

- typedef const value_type& reference;

- typedef std::forward_iterator_tag iterator_category;

-

- u32regex_iterator(){}

- u32regex_iterator(BidirectionalIterator a, BidirectionalIterator b,

- const regex_type& re,

- match_flag_type m = match_default)

- : pdata(new impl(&re, b, m))

- {

- if(!pdata->init(a))

- {

- pdata.reset();

- }

- }

- u32regex_iterator(const u32regex_iterator& that)

- : pdata(that.pdata) {}

- u32regex_iterator& operator=(const u32regex_iterator& that)

- {

- pdata = that.pdata;

- return *this;

- }

- bool operator==(const u32regex_iterator& that)const

- {

- if((pdata.get() == 0) || (that.pdata.get() == 0))

- return pdata.get() == that.pdata.get();

- return pdata->compare(*(that.pdata.get()));

- }

- bool operator!=(const u32regex_iterator& that)const

- { return !(*this == that); }

- const value_type& operator*()const

- { return pdata->get(); }

- const value_type* operator->()const

- { return &(pdata->get()); }

- u32regex_iterator& operator++()

- {

- cow();

- if(0 == pdata->next())

- {

- pdata.reset();

- }

- return *this;

- }

- u32regex_iterator operator++(int)

- {

- u32regex_iterator result(*this);

- ++(*this);

- return result;

- }

-private:

-

- pimpl pdata;

-

- void cow()

- {

- // copy-on-write

- if(pdata.get() && !pdata.unique())

- {

- pdata.reset(new impl(*(pdata.get())));

- }

- }

-};

-

-typedef u32regex_iterator<const char*> utf8regex_iterator;

-typedef u32regex_iterator<const UChar*> utf16regex_iterator;

-typedef u32regex_iterator<const UChar32*> utf32regex_iterator;

-

-inline u32regex_iterator<const char*> make_u32regex_iterator(const char* p, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)

-{

- return u32regex_iterator<const char*>(p, p+std::strlen(p), e, m);

-}

-#ifndef BOOST_NO_WREGEX

-inline u32regex_iterator<const wchar_t*> make_u32regex_iterator(const wchar_t* p, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)

-{

- return u32regex_iterator<const wchar_t*>(p, p+std::wcslen(p), e, m);

-}

-#endif

-#if !defined(U_WCHAR_IS_UTF16) && (U_SIZEOF_WCHAR_T != 2)

-inline u32regex_iterator<const UChar*> make_u32regex_iterator(const UChar* p, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)

-{

- return u32regex_iterator<const UChar*>(p, p+u_strlen(p), e, m);

-}

-#endif

-template <class charT, class Traits, class Alloc>

-inline u32regex_iterator<typename std::basic_string<charT, Traits, Alloc>::const_iterator> make_u32regex_iterator(const std::basic_string<charT, Traits, Alloc>& p, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)

-{

- typedef typename std::basic_string<charT, Traits, Alloc>::const_iterator iter_type;

- return u32regex_iterator<iter_type>(p.begin(), p.end(), e, m);

-}

-inline u32regex_iterator<const UChar*> make_u32regex_iterator(const UnicodeString& s, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)

-{

- return u32regex_iterator<const UChar*>(s.getBuffer(), s.getBuffer() + s.length(), e, m);

-}

-

-#ifdef BOOST_HAS_ABI_HEADERS

-# include BOOST_ABI_SUFFIX

-#endif

-

-} // namespace boost

-

-#endif // BOOST_REGEX_V4_REGEX_ITERATOR_HPP

-