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1/*
2 *
3 * Copyright (c) 2003
4 * John Maddock
5 *
6 * Use, modification and distribution are subject to the
7 * Boost Software License, Version 1.0. (See accompanying file
8 * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9 *
10 */
11
12 /*
13 * LOCATION: see http://www.boost.org for most recent version.
14 * FILE u32regex_token_iterator.hpp
15 * VERSION see <boost/version.hpp>
16 * DESCRIPTION: Provides u32regex_token_iterator implementation.
17 */
18
19#ifndef BOOST_REGEX_V4_U32REGEX_TOKEN_ITERATOR_HPP
20#define BOOST_REGEX_V4_U32REGEX_TOKEN_ITERATOR_HPP
21
22#if (BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570)))\
23 || BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
24//
25// Borland C++ Builder 6, and Visual C++ 6,
26// can't cope with the array template constructor
27// so we have a template member that will accept any type as
28// argument, and then assert that is really is an array:
29//
30#include <boost/static_assert.hpp>
31#include <boost/type_traits/is_array.hpp>
32#endif
33
34namespace boost{
35
36#ifdef BOOST_HAS_ABI_HEADERS
37# include BOOST_ABI_PREFIX
38#endif
39#ifdef BOOST_MSVC
40# pragma warning(push)
41# pragma warning(disable:4700)
42#endif
43
44template <class BidirectionalIterator>
45class u32regex_token_iterator_implementation
46{
47 typedef u32regex regex_type;
48 typedef sub_match<BidirectionalIterator> value_type;
49
50 match_results<BidirectionalIterator> what; // current match
51 BidirectionalIterator end; // end of search area
52 BidirectionalIterator base; // start of search area
53 const regex_type re; // the expression
54 match_flag_type flags; // match flags
55 value_type result; // the current string result
56 int N; // the current sub-expression being enumerated
57 std::vector<int> subs; // the sub-expressions to enumerate
58
59public:
60 u32regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, int sub, match_flag_type f)
61 : end(last), re(*p), flags(f){ subs.push_back(sub); }
62 u32regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const std::vector<int>& v, match_flag_type f)
63 : end(last), re(*p), flags(f), subs(v){}
64#if (BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570)))\
65 || BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) \
66 || BOOST_WORKAROUND(__HP_aCC, < 60700)
67 template <class T>
68 u32regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const T& submatches, match_flag_type f)
69 : end(last), re(*p), flags(f)
70 {
71 // assert that T really is an array:
72 BOOST_STATIC_ASSERT(::boost::is_array<T>::value);
73 const std::size_t array_size = sizeof(T) / sizeof(submatches[0]);
74 for(std::size_t i = 0; i < array_size; ++i)
75 {
76 subs.push_back(submatches[i]);
77 }
78 }
79#else
80 template <std::size_t CN>
81 u32regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const int (&submatches)[CN], match_flag_type f)
82 : end(last), re(*p), flags(f)
83 {
84 for(std::size_t i = 0; i < CN; ++i)
85 {
86 subs.push_back(submatches[i]);
87 }
88 }
89#endif
90
91 bool init(BidirectionalIterator first)
92 {
93 base = first;
94 N = 0;
95 if(u32regex_search(first, end, what, re, flags, base) == true)
96 {
97 N = 0;
98 result = ((subs[N] == -1) ? what.prefix() : what[(int)subs[N]]);
99 return true;
100 }
101 else if((subs[N] == -1) && (first != end))
102 {
103 result.first = first;
104 result.second = end;
105 result.matched = (first != end);
106 N = -1;
107 return true;
108 }
109 return false;
110 }
111 bool compare(const u32regex_token_iterator_implementation& that)
112 {
113 if(this == &that) return true;
114 return (&re.get_data() == &that.re.get_data())
115 && (end == that.end)
116 && (flags == that.flags)
117 && (N == that.N)
118 && (what[0].first == that.what[0].first)
119 && (what[0].second == that.what[0].second);
120 }
121 const value_type& get()
122 { return result; }
123 bool next()
124 {
125 if(N == -1)
126 return false;
127 if(N+1 < (int)subs.size())
128 {
129 ++N;
130 result =((subs[N] == -1) ? what.prefix() : what[subs[N]]);
131 return true;
132 }
133 //if(what.prefix().first != what[0].second)
134 // flags |= match_prev_avail | regex_constants::match_not_bob;
135 BidirectionalIterator last_end(what[0].second);
136 if(u32regex_search(last_end, end, what, re, ((what[0].first == what[0].second) ? flags | regex_constants::match_not_initial_null : flags), base))
137 {
138 N =0;
139 result =((subs[N] == -1) ? what.prefix() : what[subs[N]]);
140 return true;
141 }
142 else if((last_end != end) && (subs[0] == -1))
143 {
144 N =-1;
145 result.first = last_end;
146 result.second = end;
147 result.matched = (last_end != end);
148 return true;
149 }
150 return false;
151 }
152private:
153 u32regex_token_iterator_implementation& operator=(const u32regex_token_iterator_implementation&);
154};
155
156template <class BidirectionalIterator>
157class u32regex_token_iterator
158#ifndef BOOST_NO_STD_ITERATOR
159 : public std::iterator<
160 std::forward_iterator_tag,
161 sub_match<BidirectionalIterator>,
162 typename BOOST_REGEX_DETAIL_NS::regex_iterator_traits<BidirectionalIterator>::difference_type,
163 const sub_match<BidirectionalIterator>*,
164 const sub_match<BidirectionalIterator>& >
165#endif
166{
167private:
168 typedef u32regex_token_iterator_implementation<BidirectionalIterator> impl;
169 typedef shared_ptr<impl> pimpl;
170public:
171 typedef u32regex regex_type;
172 typedef sub_match<BidirectionalIterator> value_type;
173 typedef typename BOOST_REGEX_DETAIL_NS::regex_iterator_traits<BidirectionalIterator>::difference_type
174 difference_type;
175 typedef const value_type* pointer;
176 typedef const value_type& reference;
177 typedef std::forward_iterator_tag iterator_category;
178
179 u32regex_token_iterator(){}
180 u32regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
181 int submatch = 0, match_flag_type m = match_default)
182 : pdata(new impl(&re, b, submatch, m))
183 {
184 if(!pdata->init(a))
185 pdata.reset();
186 }
187 u32regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
188 const std::vector<int>& submatches, match_flag_type m = match_default)
189 : pdata(new impl(&re, b, submatches, m))
190 {
191 if(!pdata->init(a))
192 pdata.reset();
193 }
194#if (BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570)))\
195 || BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) \
196 || BOOST_WORKAROUND(__HP_aCC, < 60700)
197 template <class T>
198 u32regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
199 const T& submatches, match_flag_type m = match_default)
200 : pdata(new impl(&re, b, submatches, m))
201 {
202 if(!pdata->init(a))
203 pdata.reset();
204 }
205#else
206 template <std::size_t N>
207 u32regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
208 const int (&submatches)[N], match_flag_type m = match_default)
209 : pdata(new impl(&re, b, submatches, m))
210 {
211 if(!pdata->init(a))
212 pdata.reset();
213 }
214#endif
215 u32regex_token_iterator(const u32regex_token_iterator& that)
216 : pdata(that.pdata) {}
217 u32regex_token_iterator& operator=(const u32regex_token_iterator& that)
218 {
219 pdata = that.pdata;
220 return *this;
221 }
222 bool operator==(const u32regex_token_iterator& that)const
223 {
224 if((pdata.get() == 0) || (that.pdata.get() == 0))
225 return pdata.get() == that.pdata.get();
226 return pdata->compare(*(that.pdata.get()));
227 }
228 bool operator!=(const u32regex_token_iterator& that)const
229 { return !(*this == that); }
230 const value_type& operator*()const
231 { return pdata->get(); }
232 const value_type* operator->()const
233 { return &(pdata->get()); }
234 u32regex_token_iterator& operator++()
235 {
236 cow();
237 if(0 == pdata->next())
238 {
239 pdata.reset();
240 }
241 return *this;
242 }
243 u32regex_token_iterator operator++(int)
244 {
245 u32regex_token_iterator result(*this);
246 ++(*this);
247 return result;
248 }
249private:
250
251 pimpl pdata;
252
253 void cow()
254 {
255 // copy-on-write
256 if(pdata.get() && !pdata.unique())
257 {
258 pdata.reset(new impl(*(pdata.get())));
259 }
260 }
261};
262
263typedef u32regex_token_iterator<const char*> utf8regex_token_iterator;
264typedef u32regex_token_iterator<const UChar*> utf16regex_token_iterator;
265typedef u32regex_token_iterator<const UChar32*> utf32regex_token_iterator;
266
267// construction from an integral sub_match state_id:
268inline u32regex_token_iterator<const char*> make_u32regex_token_iterator(const char* p, const u32regex& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
269{
270 return u32regex_token_iterator<const char*>(p, p+std::strlen(p), e, submatch, m);
271}
272#ifndef BOOST_NO_WREGEX
273inline u32regex_token_iterator<const wchar_t*> make_u32regex_token_iterator(const wchar_t* p, const u32regex& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
274{
275 return u32regex_token_iterator<const wchar_t*>(p, p+std::wcslen(p), e, submatch, m);
276}
277#endif
278#if !defined(U_WCHAR_IS_UTF16) && (U_SIZEOF_WCHAR_T != 2)
279inline u32regex_token_iterator<const UChar*> make_u32regex_token_iterator(const UChar* p, const u32regex& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
280{
281 return u32regex_token_iterator<const UChar*>(p, p+u_strlen(p), e, submatch, m);
282}
283#endif
284template <class charT, class Traits, class Alloc>
285inline u32regex_token_iterator<typename std::basic_string<charT, Traits, Alloc>::const_iterator> make_u32regex_token_iterator(const std::basic_string<charT, Traits, Alloc>& p, const u32regex& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
286{
287 typedef typename std::basic_string<charT, Traits, Alloc>::const_iterator iter_type;
288 return u32regex_token_iterator<iter_type>(p.begin(), p.end(), e, submatch, m);
289}
290inline u32regex_token_iterator<const UChar*> make_u32regex_token_iterator(const U_NAMESPACE_QUALIFIER UnicodeString& s, const u32regex& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
291{
292 return u32regex_token_iterator<const UChar*>(s.getBuffer(), s.getBuffer() + s.length(), e, submatch, m);
293}
294
295// construction from a reference to an array:
296template <std::size_t N>
297inline u32regex_token_iterator<const char*> make_u32regex_token_iterator(const char* p, const u32regex& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
298{
299 return u32regex_token_iterator<const char*>(p, p+std::strlen(p), e, submatch, m);
300}
301#ifndef BOOST_NO_WREGEX
302template <std::size_t N>
303inline u32regex_token_iterator<const wchar_t*> make_u32regex_token_iterator(const wchar_t* p, const u32regex& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
304{
305 return u32regex_token_iterator<const wchar_t*>(p, p+std::wcslen(p), e, submatch, m);
306}
307#endif
308#if !defined(U_WCHAR_IS_UTF16) && (U_SIZEOF_WCHAR_T != 2)
309template <std::size_t N>
310inline u32regex_token_iterator<const UChar*> make_u32regex_token_iterator(const UChar* p, const u32regex& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
311{
312 return u32regex_token_iterator<const UChar*>(p, p+u_strlen(p), e, submatch, m);
313}
314#endif
315template <class charT, class Traits, class Alloc, std::size_t N>
316inline u32regex_token_iterator<typename std::basic_string<charT, Traits, Alloc>::const_iterator> make_u32regex_token_iterator(const std::basic_string<charT, Traits, Alloc>& p, const u32regex& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
317{
318 typedef typename std::basic_string<charT, Traits, Alloc>::const_iterator iter_type;
319 return u32regex_token_iterator<iter_type>(p.begin(), p.end(), e, submatch, m);
320}
321template <std::size_t N>
322inline u32regex_token_iterator<const UChar*> make_u32regex_token_iterator(const U_NAMESPACE_QUALIFIER UnicodeString& s, const u32regex& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
323{
324 return u32regex_token_iterator<const UChar*>(s.getBuffer(), s.getBuffer() + s.length(), e, submatch, m);
325}
326
327// construction from a vector of sub_match state_id's:
328inline u32regex_token_iterator<const char*> make_u32regex_token_iterator(const char* p, const u32regex& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
329{
330 return u32regex_token_iterator<const char*>(p, p+std::strlen(p), e, submatch, m);
331}
332#ifndef BOOST_NO_WREGEX
333inline u32regex_token_iterator<const wchar_t*> make_u32regex_token_iterator(const wchar_t* p, const u32regex& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
334{
335 return u32regex_token_iterator<const wchar_t*>(p, p+std::wcslen(p), e, submatch, m);
336}
337#endif
338#if !defined(U_WCHAR_IS_UTF16) && (U_SIZEOF_WCHAR_T != 2)
339inline u32regex_token_iterator<const UChar*> make_u32regex_token_iterator(const UChar* p, const u32regex& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
340{
341 return u32regex_token_iterator<const UChar*>(p, p+u_strlen(p), e, submatch, m);
342}
343#endif
344template <class charT, class Traits, class Alloc>
345inline u32regex_token_iterator<typename std::basic_string<charT, Traits, Alloc>::const_iterator> make_u32regex_token_iterator(const std::basic_string<charT, Traits, Alloc>& p, const u32regex& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
346{
347 typedef typename std::basic_string<charT, Traits, Alloc>::const_iterator iter_type;
348 return u32regex_token_iterator<iter_type>(p.begin(), p.end(), e, submatch, m);
349}
350inline u32regex_token_iterator<const UChar*> make_u32regex_token_iterator(const U_NAMESPACE_QUALIFIER UnicodeString& s, const u32regex& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
351{
352 return u32regex_token_iterator<const UChar*>(s.getBuffer(), s.getBuffer() + s.length(), e, submatch, m);
353}
354
355#ifdef BOOST_MSVC
356# pragma warning(pop)
357#endif
358#ifdef BOOST_HAS_ABI_HEADERS
359# include BOOST_ABI_SUFFIX
360#endif
361
362} // namespace boost
363
364#endif // BOOST_REGEX_V4_REGEX_TOKEN_ITERATOR_HPP
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