1 //===-------------------------- regex.cpp ---------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "regex"
11 #include "algorithm"
12 #include "iterator"
13
14 _LIBCPP_BEGIN_NAMESPACE_STD
15
16 static
17 const char*
make_error_type_string(regex_constants::error_type ecode)18 make_error_type_string(regex_constants::error_type ecode)
19 {
20 switch (ecode)
21 {
22 case regex_constants::error_collate:
23 return "The expression contained an invalid collating element name.";
24 case regex_constants::error_ctype:
25 return "The expression contained an invalid character class name.";
26 case regex_constants::error_escape:
27 return "The expression contained an invalid escaped character, or a "
28 "trailing escape.";
29 case regex_constants::error_backref:
30 return "The expression contained an invalid back reference.";
31 case regex_constants::error_brack:
32 return "The expression contained mismatched [ and ].";
33 case regex_constants::error_paren:
34 return "The expression contained mismatched ( and ).";
35 case regex_constants::error_brace:
36 return "The expression contained mismatched { and }.";
37 case regex_constants::error_badbrace:
38 return "The expression contained an invalid range in a {} expression.";
39 case regex_constants::error_range:
40 return "The expression contained an invalid character range, "
41 "such as [b-a] in most encodings.";
42 case regex_constants::error_space:
43 return "There was insufficient memory to convert the expression into "
44 "a finite state machine.";
45 case regex_constants::error_badrepeat:
46 return "One of *?+{ was not preceded by a valid regular expression.";
47 case regex_constants::error_complexity:
48 return "The complexity of an attempted match against a regular "
49 "expression exceeded a pre-set level.";
50 case regex_constants::error_stack:
51 return "There was insufficient memory to determine whether the regular "
52 "expression could match the specified character sequence.";
53 case regex_constants::__re_err_grammar:
54 return "An invalid regex grammar has been requested.";
55 case regex_constants::__re_err_empty:
56 return "An empty regex is not allowed in the POSIX grammar.";
57 default:
58 break;
59 }
60 return "Unknown error type";
61 }
62
regex_error(regex_constants::error_type ecode)63 regex_error::regex_error(regex_constants::error_type ecode)
64 : runtime_error(make_error_type_string(ecode)),
65 __code_(ecode)
66 {}
67
~regex_error()68 regex_error::~regex_error() throw() {}
69
70 namespace {
71
72 struct collationnames
73 {
74 const char* elem_;
75 char char_;
76 };
77
78 const collationnames collatenames[] =
79 {
80 {"A", 0x41},
81 {"B", 0x42},
82 {"C", 0x43},
83 {"D", 0x44},
84 {"E", 0x45},
85 {"F", 0x46},
86 {"G", 0x47},
87 {"H", 0x48},
88 {"I", 0x49},
89 {"J", 0x4a},
90 {"K", 0x4b},
91 {"L", 0x4c},
92 {"M", 0x4d},
93 {"N", 0x4e},
94 {"NUL", 0x00},
95 {"O", 0x4f},
96 {"P", 0x50},
97 {"Q", 0x51},
98 {"R", 0x52},
99 {"S", 0x53},
100 {"T", 0x54},
101 {"U", 0x55},
102 {"V", 0x56},
103 {"W", 0x57},
104 {"X", 0x58},
105 {"Y", 0x59},
106 {"Z", 0x5a},
107 {"a", 0x61},
108 {"alert", 0x07},
109 {"ampersand", 0x26},
110 {"apostrophe", 0x27},
111 {"asterisk", 0x2a},
112 {"b", 0x62},
113 {"backslash", 0x5c},
114 {"backspace", 0x08},
115 {"c", 0x63},
116 {"carriage-return", 0x0d},
117 {"circumflex", 0x5e},
118 {"circumflex-accent", 0x5e},
119 {"colon", 0x3a},
120 {"comma", 0x2c},
121 {"commercial-at", 0x40},
122 {"d", 0x64},
123 {"dollar-sign", 0x24},
124 {"e", 0x65},
125 {"eight", 0x38},
126 {"equals-sign", 0x3d},
127 {"exclamation-mark", 0x21},
128 {"f", 0x66},
129 {"five", 0x35},
130 {"form-feed", 0x0c},
131 {"four", 0x34},
132 {"full-stop", 0x2e},
133 {"g", 0x67},
134 {"grave-accent", 0x60},
135 {"greater-than-sign", 0x3e},
136 {"h", 0x68},
137 {"hyphen", 0x2d},
138 {"hyphen-minus", 0x2d},
139 {"i", 0x69},
140 {"j", 0x6a},
141 {"k", 0x6b},
142 {"l", 0x6c},
143 {"left-brace", 0x7b},
144 {"left-curly-bracket", 0x7b},
145 {"left-parenthesis", 0x28},
146 {"left-square-bracket", 0x5b},
147 {"less-than-sign", 0x3c},
148 {"low-line", 0x5f},
149 {"m", 0x6d},
150 {"n", 0x6e},
151 {"newline", 0x0a},
152 {"nine", 0x39},
153 {"number-sign", 0x23},
154 {"o", 0x6f},
155 {"one", 0x31},
156 {"p", 0x70},
157 {"percent-sign", 0x25},
158 {"period", 0x2e},
159 {"plus-sign", 0x2b},
160 {"q", 0x71},
161 {"question-mark", 0x3f},
162 {"quotation-mark", 0x22},
163 {"r", 0x72},
164 {"reverse-solidus", 0x5c},
165 {"right-brace", 0x7d},
166 {"right-curly-bracket", 0x7d},
167 {"right-parenthesis", 0x29},
168 {"right-square-bracket", 0x5d},
169 {"s", 0x73},
170 {"semicolon", 0x3b},
171 {"seven", 0x37},
172 {"six", 0x36},
173 {"slash", 0x2f},
174 {"solidus", 0x2f},
175 {"space", 0x20},
176 {"t", 0x74},
177 {"tab", 0x09},
178 {"three", 0x33},
179 {"tilde", 0x7e},
180 {"two", 0x32},
181 {"u", 0x75},
182 {"underscore", 0x5f},
183 {"v", 0x76},
184 {"vertical-line", 0x7c},
185 {"vertical-tab", 0x0b},
186 {"w", 0x77},
187 {"x", 0x78},
188 {"y", 0x79},
189 {"z", 0x7a},
190 {"zero", 0x30}
191 };
192
193 struct classnames
194 {
195 const char* elem_;
196 regex_traits<char>::char_class_type mask_;
197 };
198
199 const classnames ClassNames[] =
200 {
201 {"alnum", ctype_base::alnum},
202 {"alpha", ctype_base::alpha},
203 {"blank", ctype_base::blank},
204 {"cntrl", ctype_base::cntrl},
205 {"d", ctype_base::digit},
206 {"digit", ctype_base::digit},
207 {"graph", ctype_base::graph},
208 {"lower", ctype_base::lower},
209 {"print", ctype_base::print},
210 {"punct", ctype_base::punct},
211 {"s", ctype_base::space},
212 {"space", ctype_base::space},
213 {"upper", ctype_base::upper},
214 {"w", regex_traits<char>::__regex_word},
215 {"xdigit", ctype_base::xdigit}
216 };
217
218 struct use_strcmp
219 {
operator ()__anon20e22a6c0111::use_strcmp220 bool operator()(const collationnames& x, const char* y)
221 {return strcmp(x.elem_, y) < 0;}
operator ()__anon20e22a6c0111::use_strcmp222 bool operator()(const classnames& x, const char* y)
223 {return strcmp(x.elem_, y) < 0;}
224 };
225
226 }
227
228 string
__get_collation_name(const char * s)229 __get_collation_name(const char* s)
230 {
231 const collationnames* i =
232 _VSTD::lower_bound(begin(collatenames), end(collatenames), s, use_strcmp());
233 string r;
234 if (i != end(collatenames) && strcmp(s, i->elem_) == 0)
235 r = char(i->char_);
236 return r;
237 }
238
239 regex_traits<char>::char_class_type
__get_classname(const char * s,bool __icase)240 __get_classname(const char* s, bool __icase)
241 {
242 const classnames* i =
243 _VSTD::lower_bound(begin(ClassNames), end(ClassNames), s, use_strcmp());
244 regex_traits<char>::char_class_type r = 0;
245 if (i != end(ClassNames) && strcmp(s, i->elem_) == 0)
246 {
247 r = i->mask_;
248 if (r == regex_traits<char>::__regex_word)
249 r |= ctype_base::alnum | ctype_base::upper | ctype_base::lower;
250 else if (__icase)
251 {
252 if (r & (ctype_base::lower | ctype_base::upper))
253 r |= ctype_base::alpha;
254 }
255 }
256 return r;
257 }
258
259 template <>
260 void
__exec(__state & __s) const261 __match_any_but_newline<char>::__exec(__state& __s) const
262 {
263 if (__s.__current_ != __s.__last_)
264 {
265 switch (*__s.__current_)
266 {
267 case '\r':
268 case '\n':
269 __s.__do_ = __state::__reject;
270 __s.__node_ = nullptr;
271 break;
272 default:
273 __s.__do_ = __state::__accept_and_consume;
274 ++__s.__current_;
275 __s.__node_ = this->first();
276 break;
277 }
278 }
279 else
280 {
281 __s.__do_ = __state::__reject;
282 __s.__node_ = nullptr;
283 }
284 }
285
286 template <>
287 void
__exec(__state & __s) const288 __match_any_but_newline<wchar_t>::__exec(__state& __s) const
289 {
290 if (__s.__current_ != __s.__last_)
291 {
292 switch (*__s.__current_)
293 {
294 case '\r':
295 case '\n':
296 case 0x2028:
297 case 0x2029:
298 __s.__do_ = __state::__reject;
299 __s.__node_ = nullptr;
300 break;
301 default:
302 __s.__do_ = __state::__accept_and_consume;
303 ++__s.__current_;
304 __s.__node_ = this->first();
305 break;
306 }
307 }
308 else
309 {
310 __s.__do_ = __state::__reject;
311 __s.__node_ = nullptr;
312 }
313 }
314
315 _LIBCPP_END_NAMESPACE_STD
316