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 regex_token_iterator.hpp
15 * VERSION see <boost/version.hpp>
16 * DESCRIPTION: Provides regex_token_iterator implementation.
17 */
18
19#ifndef BOOST_REGEX_V4_REGEX_TOKEN_ITERATOR_HPP
20#define BOOST_REGEX_V4_REGEX_TOKEN_ITERATOR_HPP
21
22#include <boost/shared_ptr.hpp>
23#include <boost/detail/workaround.hpp>
24#if (BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570)))\
25 || BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
26//
27// Borland C++ Builder 6, and Visual C++ 6,
28// can't cope with the array template constructor
29// so we have a template member that will accept any type as
30// argument, and then assert that is really is an array:
31//
32#include <boost/static_assert.hpp>
33#include <boost/type_traits/is_array.hpp>
34#endif
35
36namespace boost{
37
38#ifdef BOOST_MSVC
39#pragma warning(push)
40#pragma warning(disable: 4103)
41#endif
42#ifdef BOOST_HAS_ABI_HEADERS
43# include BOOST_ABI_PREFIX
44#endif
45#ifdef BOOST_MSVC
46#pragma warning(pop)
47#pragma warning(push)
48#pragma warning(disable:4700)
49#endif
50
51template <class BidirectionalIterator,
52 class charT,
53 class traits>
54class regex_token_iterator_implementation
55{
56 typedef basic_regex<charT, traits> regex_type;
57 typedef sub_match<BidirectionalIterator> value_type;
58
59 match_results<BidirectionalIterator> what; // current match
60 BidirectionalIterator base; // start of search area
61 BidirectionalIterator end; // end of search area
62 const regex_type re; // the expression
63 match_flag_type flags; // match flags
64 value_type result; // the current string result
65 int N; // the current sub-expression being enumerated
66 std::vector<int> subs; // the sub-expressions to enumerate
67
68public:
69 regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, int sub, match_flag_type f)
70 : end(last), re(*p), flags(f){ subs.push_back(sub); }
71 regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const std::vector<int>& v, match_flag_type f)
72 : end(last), re(*p), flags(f), subs(v){}
73#if !BOOST_WORKAROUND(__HP_aCC, < 60700)
74#if (BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570)))\
75 || BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) \
76 || BOOST_WORKAROUND(__HP_aCC, < 60700)
77 template <class T>
78 regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const T& submatches, match_flag_type f)
79 : end(last), re(*p), flags(f)
80 {
81 // assert that T really is an array:
82 BOOST_STATIC_ASSERT(::boost::is_array<T>::value);
83 const std::size_t array_size = sizeof(T) / sizeof(submatches[0]);
84 for(std::size_t i = 0; i < array_size; ++i)
85 {
86 subs.push_back(submatches[i]);
87 }
88 }
89#else
90 template <std::size_t CN>
91 regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const int (&submatches)[CN], match_flag_type f)
92 : end(last), re(*p), flags(f)
93 {
94 for(std::size_t i = 0; i < CN; ++i)
95 {
96 subs.push_back(submatches[i]);
97 }
98 }
99#endif
100#endif
101 bool init(BidirectionalIterator first)
102 {
103 N = 0;
104 base = first;
105 if(regex_search(first, end, what, re, flags, base) == true)
106 {
107 N = 0;
108 result = ((subs[N] == -1) ? what.prefix() : what[(int)subs[N]]);
109 return true;
110 }
111 else if((subs[N] == -1) && (first != end))
112 {
113 result.first = first;
114 result.second = end;
115 result.matched = (first != end);
116 N = -1;
117 return true;
118 }
119 return false;
120 }
121 bool compare(const regex_token_iterator_implementation& that)
122 {
123 if(this == &that) return true;
124 return (&re.get_data() == &that.re.get_data())
125 && (end == that.end)
126 && (flags == that.flags)
127 && (N == that.N)
128 && (what[0].first == that.what[0].first)
129 && (what[0].second == that.what[0].second);
130 }
131 const value_type& get()
132 { return result; }
133 bool next()
134 {
135 if(N == -1)
136 return false;
137 if(N+1 < (int)subs.size())
138 {
139 ++N;
140 result =((subs[N] == -1) ? what.prefix() : what[subs[N]]);
141 return true;
142 }
143 //if(what.prefix().first != what[0].second)
144 // flags |= /*match_prev_avail |*/ regex_constants::match_not_bob;
145 BidirectionalIterator last_end(what[0].second);
146 if(regex_search(last_end, end, what, re, ((what[0].first == what[0].second) ? flags | regex_constants::match_not_initial_null : flags), base))
147 {
148 N =0;
149 result =((subs[N] == -1) ? what.prefix() : what[subs[N]]);
150 return true;
151 }
152 else if((last_end != end) && (subs[0] == -1))
153 {
154 N =-1;
155 result.first = last_end;
156 result.second = end;
157 result.matched = (last_end != end);
158 return true;
159 }
160 return false;
161 }
162private:
163 regex_token_iterator_implementation& operator=(const regex_token_iterator_implementation&);
164};
165
166template <class BidirectionalIterator,
167 class charT = BOOST_DEDUCED_TYPENAME BOOST_REGEX_DETAIL_NS::regex_iterator_traits<BidirectionalIterator>::value_type,
168 class traits = regex_traits<charT> >
169class regex_token_iterator
170{
171private:
172 typedef regex_token_iterator_implementation<BidirectionalIterator, charT, traits> impl;
173 typedef shared_ptr<impl> pimpl;
174public:
175 typedef basic_regex<charT, traits> regex_type;
176 typedef sub_match<BidirectionalIterator> value_type;
177 typedef typename BOOST_REGEX_DETAIL_NS::regex_iterator_traits<BidirectionalIterator>::difference_type
178 difference_type;
179 typedef const value_type* pointer;
180 typedef const value_type& reference;
181 typedef std::forward_iterator_tag iterator_category;
182
183 regex_token_iterator(){}
184 regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
185 int submatch = 0, match_flag_type m = match_default)
186 : pdata(new impl(&re, b, submatch, m))
187 {
188 if(!pdata->init(a))
189 pdata.reset();
190 }
191 regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
192 const std::vector<int>& submatches, match_flag_type m = match_default)
193 : pdata(new impl(&re, b, submatches, m))
194 {
195 if(!pdata->init(a))
196 pdata.reset();
197 }
198#if !BOOST_WORKAROUND(__HP_aCC, < 60700)
199#if (BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570)))\
200 || BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) \
201 || BOOST_WORKAROUND(__HP_aCC, < 60700)
202 template <class T>
203 regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
204 const T& submatches, match_flag_type m = match_default)
205 : pdata(new impl(&re, b, submatches, m))
206 {
207 if(!pdata->init(a))
208 pdata.reset();
209 }
210#else
211 template <std::size_t N>
212 regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
213 const int (&submatches)[N], match_flag_type m = match_default)
214 : pdata(new impl(&re, b, submatches, m))
215 {
216 if(!pdata->init(a))
217 pdata.reset();
218 }
219#endif
220#endif
221 regex_token_iterator(const regex_token_iterator& that)
222 : pdata(that.pdata) {}
223 regex_token_iterator& operator=(const regex_token_iterator& that)
224 {
225 pdata = that.pdata;
226 return *this;
227 }
228 bool operator==(const regex_token_iterator& that)const
229 {
230 if((pdata.get() == 0) || (that.pdata.get() == 0))
231 return pdata.get() == that.pdata.get();
232 return pdata->compare(*(that.pdata.get()));
233 }
234 bool operator!=(const regex_token_iterator& that)const
235 { return !(*this == that); }
236 const value_type& operator*()const
237 { return pdata->get(); }
238 const value_type* operator->()const
239 { return &(pdata->get()); }
240 regex_token_iterator& operator++()
241 {
242 cow();
243 if(0 == pdata->next())
244 {
245 pdata.reset();
246 }
247 return *this;
248 }
249 regex_token_iterator operator++(int)
250 {
251 regex_token_iterator result(*this);
252 ++(*this);
253 return result;
254 }
255private:
256
257 pimpl pdata;
258
259 void cow()
260 {
261 // copy-on-write
262 if(pdata.get() && !pdata.unique())
263 {
264 pdata.reset(new impl(*(pdata.get())));
265 }
266 }
267};
268
269typedef regex_token_iterator<const char*> cregex_token_iterator;
270typedef regex_token_iterator<std::string::const_iterator> sregex_token_iterator;
271#ifndef BOOST_NO_WREGEX
272typedef regex_token_iterator<const wchar_t*> wcregex_token_iterator;
273typedef regex_token_iterator<std::wstring::const_iterator> wsregex_token_iterator;
274#endif
275
276template <class charT, class traits>
277inline regex_token_iterator<const charT*, charT, traits> make_regex_token_iterator(const charT* p, const basic_regex<charT, traits>& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
278{
279 return regex_token_iterator<const charT*, charT, traits>(p, p+traits::length(p), e, submatch, m);
280}
281template <class charT, class traits, class ST, class SA>
282inline regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits> make_regex_token_iterator(const std::basic_string<charT, ST, SA>& p, const basic_regex<charT, traits>& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
283{
284 return regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits>(p.begin(), p.end(), e, submatch, m);
285}
286template <class charT, class traits, std::size_t N>
287inline regex_token_iterator<const charT*, charT, traits> make_regex_token_iterator(const charT* p, const basic_regex<charT, traits>& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
288{
289 return regex_token_iterator<const charT*, charT, traits>(p, p+traits::length(p), e, submatch, m);
290}
291template <class charT, class traits, class ST, class SA, std::size_t N>
292inline regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits> make_regex_token_iterator(const std::basic_string<charT, ST, SA>& p, const basic_regex<charT, traits>& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
293{
294 return regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits>(p.begin(), p.end(), e, submatch, m);
295}
296template <class charT, class traits>
297inline regex_token_iterator<const charT*, charT, traits> make_regex_token_iterator(const charT* p, const basic_regex<charT, traits>& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
298{
299 return regex_token_iterator<const charT*, charT, traits>(p, p+traits::length(p), e, submatch, m);
300}
301template <class charT, class traits, class ST, class SA>
302inline regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits> make_regex_token_iterator(const std::basic_string<charT, ST, SA>& p, const basic_regex<charT, traits>& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
303{
304 return regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits>(p.begin(), p.end(), e, submatch, m);
305}
306
307#ifdef BOOST_MSVC
308#pragma warning(pop)
309#pragma warning(push)
310#pragma warning(disable: 4103)
311#endif
312#ifdef BOOST_HAS_ABI_HEADERS
313# include BOOST_ABI_SUFFIX
314#endif
315#ifdef BOOST_MSVC
316#pragma warning(pop)
317#endif
318
319} // namespace boost
320
321#endif // BOOST_REGEX_V4_REGEX_TOKEN_ITERATOR_HPP
322
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