Chris@16: /*
Chris@16:  *
Chris@16:  * Copyright (c) 2003
Chris@16:  * John Maddock
Chris@16:  *
Chris@16:  * Use, modification and distribution are subject to the 
Chris@16:  * Boost Software License, Version 1.0. (See accompanying file 
Chris@16:  * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  *
Chris@16:  */
Chris@16: 
Chris@16:  /*
Chris@16:   *   LOCATION:    see http://www.boost.org for most recent version.
Chris@16:   *   FILE         u32regex_iterator.hpp
Chris@16:   *   VERSION      see <boost/version.hpp>
Chris@16:   *   DESCRIPTION: Provides u32regex_iterator implementation.
Chris@16:   */
Chris@16: 
Chris@16: #ifndef BOOST_REGEX_V4_U32REGEX_ITERATOR_HPP
Chris@16: #define BOOST_REGEX_V4_U32REGEX_ITERATOR_HPP
Chris@16: 
Chris@16: namespace boost{
Chris@16: 
Chris@16: #ifdef BOOST_HAS_ABI_HEADERS
Chris@16: #  include BOOST_ABI_PREFIX
Chris@16: #endif
Chris@16: 
Chris@16: template <class BidirectionalIterator>
Chris@16: class u32regex_iterator_implementation 
Chris@16: {
Chris@16:    typedef u32regex regex_type;
Chris@16: 
Chris@16:    match_results<BidirectionalIterator> what;  // current match
Chris@16:    BidirectionalIterator                base;  // start of sequence
Chris@16:    BidirectionalIterator                end;   // end of sequence
Chris@16:    const regex_type                     re;   // the expression
Chris@16:    match_flag_type                      flags; // flags for matching
Chris@16: 
Chris@16: public:
Chris@16:    u32regex_iterator_implementation(const regex_type* p, BidirectionalIterator last, match_flag_type f)
Chris@16:       : base(), end(last), re(*p), flags(f){}
Chris@16:    bool init(BidirectionalIterator first)
Chris@16:    {
Chris@16:       base = first;
Chris@16:       return u32regex_search(first, end, what, re, flags, base);
Chris@16:    }
Chris@16:    bool compare(const u32regex_iterator_implementation& that)
Chris@16:    {
Chris@16:       if(this == &that) return true;
Chris@16:       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);
Chris@16:    }
Chris@16:    const match_results<BidirectionalIterator>& get()
Chris@16:    { return what; }
Chris@16:    bool next()
Chris@16:    {
Chris@16:       //if(what.prefix().first != what[0].second)
Chris@16:       //   flags |= match_prev_avail;
Chris@16:       BidirectionalIterator next_start = what[0].second;
Chris@16:       match_flag_type f(flags);
Chris@16:       if(!what.length())
Chris@16:          f |= regex_constants::match_not_initial_null;
Chris@16:       //if(base != next_start)
Chris@16:       //   f |= regex_constants::match_not_bob;
Chris@16:       bool result = u32regex_search(next_start, end, what, re, f, base);
Chris@16:       if(result)
Chris@16:          what.set_base(base);
Chris@16:       return result;
Chris@16:    }
Chris@16: private:
Chris@16:    u32regex_iterator_implementation& operator=(const u32regex_iterator_implementation&);
Chris@16: };
Chris@16: 
Chris@16: template <class BidirectionalIterator>
Chris@16: class u32regex_iterator 
Chris@16: #ifndef BOOST_NO_STD_ITERATOR
Chris@16:    : public std::iterator<
Chris@16:          std::forward_iterator_tag, 
Chris@16:          match_results<BidirectionalIterator>,
Chris@16:          typename re_detail::regex_iterator_traits<BidirectionalIterator>::difference_type,
Chris@16:          const match_results<BidirectionalIterator>*,
Chris@16:          const match_results<BidirectionalIterator>& >         
Chris@16: #endif
Chris@16: {
Chris@16: private:
Chris@16:    typedef u32regex_iterator_implementation<BidirectionalIterator> impl;
Chris@16:    typedef shared_ptr<impl> pimpl;
Chris@16: public:
Chris@16:    typedef          u32regex                                                regex_type;
Chris@16:    typedef          match_results<BidirectionalIterator>                    value_type;
Chris@16:    typedef typename re_detail::regex_iterator_traits<BidirectionalIterator>::difference_type 
Chris@16:                                                                             difference_type;
Chris@16:    typedef          const value_type*                                       pointer;
Chris@16:    typedef          const value_type&                                       reference; 
Chris@16:    typedef          std::forward_iterator_tag                               iterator_category;
Chris@16:    
Chris@16:    u32regex_iterator(){}
Chris@16:    u32regex_iterator(BidirectionalIterator a, BidirectionalIterator b, 
Chris@16:                   const regex_type& re, 
Chris@16:                   match_flag_type m = match_default)
Chris@16:                   : pdata(new impl(&re, b, m))
Chris@16:    {
Chris@16:       if(!pdata->init(a))
Chris@16:       {
Chris@16:          pdata.reset();
Chris@16:       }
Chris@16:    }
Chris@16:    u32regex_iterator(const u32regex_iterator& that)
Chris@16:       : pdata(that.pdata) {}
Chris@16:    u32regex_iterator& operator=(const u32regex_iterator& that)
Chris@16:    {
Chris@16:       pdata = that.pdata;
Chris@16:       return *this;
Chris@16:    }
Chris@16:    bool operator==(const u32regex_iterator& that)const
Chris@16:    { 
Chris@16:       if((pdata.get() == 0) || (that.pdata.get() == 0))
Chris@16:          return pdata.get() == that.pdata.get();
Chris@16:       return pdata->compare(*(that.pdata.get())); 
Chris@16:    }
Chris@16:    bool operator!=(const u32regex_iterator& that)const
Chris@16:    { return !(*this == that); }
Chris@16:    const value_type& operator*()const
Chris@16:    { return pdata->get(); }
Chris@16:    const value_type* operator->()const
Chris@16:    { return &(pdata->get()); }
Chris@16:    u32regex_iterator& operator++()
Chris@16:    {
Chris@16:       cow();
Chris@16:       if(0 == pdata->next())
Chris@16:       {
Chris@16:          pdata.reset();
Chris@16:       }
Chris@16:       return *this;
Chris@16:    }
Chris@16:    u32regex_iterator operator++(int)
Chris@16:    {
Chris@16:       u32regex_iterator result(*this);
Chris@16:       ++(*this);
Chris@16:       return result;
Chris@16:    }
Chris@16: private:
Chris@16: 
Chris@16:    pimpl pdata;
Chris@16: 
Chris@16:    void cow()
Chris@16:    {
Chris@16:       // copy-on-write
Chris@16:       if(pdata.get() && !pdata.unique())
Chris@16:       {
Chris@16:          pdata.reset(new impl(*(pdata.get())));
Chris@16:       }
Chris@16:    }
Chris@16: };
Chris@16: 
Chris@16: typedef u32regex_iterator<const char*> utf8regex_iterator;
Chris@16: typedef u32regex_iterator<const UChar*> utf16regex_iterator;
Chris@16: typedef u32regex_iterator<const UChar32*> utf32regex_iterator;
Chris@16: 
Chris@16: inline u32regex_iterator<const char*> make_u32regex_iterator(const char* p, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)
Chris@16: {
Chris@16:    return u32regex_iterator<const char*>(p, p+std::strlen(p), e, m);
Chris@16: }
Chris@16: #ifndef BOOST_NO_WREGEX
Chris@16: 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)
Chris@16: {
Chris@16:    return u32regex_iterator<const wchar_t*>(p, p+std::wcslen(p), e, m);
Chris@16: }
Chris@16: #endif
Chris@16: #if !defined(U_WCHAR_IS_UTF16) && (U_SIZEOF_WCHAR_T != 2)
Chris@16: inline u32regex_iterator<const UChar*> make_u32regex_iterator(const UChar* p, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)
Chris@16: {
Chris@16:    return u32regex_iterator<const UChar*>(p, p+u_strlen(p), e, m);
Chris@16: }
Chris@16: #endif
Chris@16: template <class charT, class Traits, class Alloc>
Chris@16: 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)
Chris@16: {
Chris@16:    typedef typename std::basic_string<charT, Traits, Alloc>::const_iterator iter_type;
Chris@16:    return u32regex_iterator<iter_type>(p.begin(), p.end(), e, m);
Chris@16: }
Chris@16: inline u32regex_iterator<const UChar*> make_u32regex_iterator(const U_NAMESPACE_QUALIFIER UnicodeString& s, const u32regex& e, regex_constants::match_flag_type m = regex_constants::match_default)
Chris@16: {
Chris@16:    return u32regex_iterator<const UChar*>(s.getBuffer(), s.getBuffer() + s.length(), e, m);
Chris@16: }
Chris@16: 
Chris@16: #ifdef BOOST_HAS_ABI_HEADERS
Chris@16: #  include BOOST_ABI_SUFFIX
Chris@16: #endif
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_REGEX_V4_REGEX_ITERATOR_HPP
Chris@16: