/src/augeas/gnulib/lib/regcomp.c
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1 | | /* Extended regular expression matching and search library. |
2 | | Copyright (C) 2002-2022 Free Software Foundation, Inc. |
3 | | This file is part of the GNU C Library. |
4 | | Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>. |
5 | | |
6 | | The GNU C Library is free software; you can redistribute it and/or |
7 | | modify it under the terms of the GNU Lesser General Public |
8 | | License as published by the Free Software Foundation; either |
9 | | version 2.1 of the License, or (at your option) any later version. |
10 | | |
11 | | The GNU C Library is distributed in the hope that it will be useful, |
12 | | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | | Lesser General Public License for more details. |
15 | | |
16 | | You should have received a copy of the GNU Lesser General Public |
17 | | License along with the GNU C Library; if not, see |
18 | | <https://www.gnu.org/licenses/>. */ |
19 | | |
20 | | #ifdef _LIBC |
21 | | # include <locale/weight.h> |
22 | | #endif |
23 | | |
24 | | static reg_errcode_t re_compile_internal (regex_t *preg, const char * pattern, |
25 | | size_t length, reg_syntax_t syntax); |
26 | | static void re_compile_fastmap_iter (regex_t *bufp, |
27 | | const re_dfastate_t *init_state, |
28 | | char *fastmap); |
29 | | static reg_errcode_t init_dfa (re_dfa_t *dfa, size_t pat_len); |
30 | | static void free_charset (re_charset_t *cset); |
31 | | static void free_workarea_compile (regex_t *preg); |
32 | | static reg_errcode_t create_initial_state (re_dfa_t *dfa); |
33 | | static void optimize_utf8 (re_dfa_t *dfa); |
34 | | static reg_errcode_t analyze (regex_t *preg); |
35 | | static reg_errcode_t preorder (bin_tree_t *root, |
36 | | reg_errcode_t (fn (void *, bin_tree_t *)), |
37 | | void *extra); |
38 | | static reg_errcode_t postorder (bin_tree_t *root, |
39 | | reg_errcode_t (fn (void *, bin_tree_t *)), |
40 | | void *extra); |
41 | | static reg_errcode_t optimize_subexps (void *extra, bin_tree_t *node); |
42 | | static reg_errcode_t lower_subexps (void *extra, bin_tree_t *node); |
43 | | static bin_tree_t *lower_subexp (reg_errcode_t *err, regex_t *preg, |
44 | | bin_tree_t *node); |
45 | | static reg_errcode_t calc_first (void *extra, bin_tree_t *node); |
46 | | static reg_errcode_t calc_next (void *extra, bin_tree_t *node); |
47 | | static reg_errcode_t link_nfa_nodes (void *extra, bin_tree_t *node); |
48 | | static Idx duplicate_node (re_dfa_t *dfa, Idx org_idx, unsigned int constraint); |
49 | | static Idx search_duplicated_node (const re_dfa_t *dfa, Idx org_node, |
50 | | unsigned int constraint); |
51 | | static reg_errcode_t calc_eclosure (re_dfa_t *dfa); |
52 | | static reg_errcode_t calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa, |
53 | | Idx node, bool root); |
54 | | static reg_errcode_t calc_inveclosure (re_dfa_t *dfa); |
55 | | static Idx fetch_number (re_string_t *input, re_token_t *token, |
56 | | reg_syntax_t syntax); |
57 | | static int peek_token (re_token_t *token, re_string_t *input, |
58 | | reg_syntax_t syntax); |
59 | | static bin_tree_t *parse (re_string_t *regexp, regex_t *preg, |
60 | | reg_syntax_t syntax, reg_errcode_t *err); |
61 | | static bin_tree_t *parse_reg_exp (re_string_t *regexp, regex_t *preg, |
62 | | re_token_t *token, reg_syntax_t syntax, |
63 | | Idx nest, reg_errcode_t *err); |
64 | | static bin_tree_t *parse_branch (re_string_t *regexp, regex_t *preg, |
65 | | re_token_t *token, reg_syntax_t syntax, |
66 | | Idx nest, reg_errcode_t *err); |
67 | | static bin_tree_t *parse_expression (re_string_t *regexp, regex_t *preg, |
68 | | re_token_t *token, reg_syntax_t syntax, |
69 | | Idx nest, reg_errcode_t *err); |
70 | | static bin_tree_t *parse_sub_exp (re_string_t *regexp, regex_t *preg, |
71 | | re_token_t *token, reg_syntax_t syntax, |
72 | | Idx nest, reg_errcode_t *err); |
73 | | static bin_tree_t *parse_dup_op (bin_tree_t *dup_elem, re_string_t *regexp, |
74 | | re_dfa_t *dfa, re_token_t *token, |
75 | | reg_syntax_t syntax, reg_errcode_t *err); |
76 | | static bin_tree_t *parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, |
77 | | re_token_t *token, reg_syntax_t syntax, |
78 | | reg_errcode_t *err); |
79 | | static reg_errcode_t parse_bracket_element (bracket_elem_t *elem, |
80 | | re_string_t *regexp, |
81 | | re_token_t *token, int token_len, |
82 | | re_dfa_t *dfa, |
83 | | reg_syntax_t syntax, |
84 | | bool accept_hyphen); |
85 | | static reg_errcode_t parse_bracket_symbol (bracket_elem_t *elem, |
86 | | re_string_t *regexp, |
87 | | re_token_t *token); |
88 | | static reg_errcode_t build_equiv_class (bitset_t sbcset, |
89 | | re_charset_t *mbcset, |
90 | | Idx *equiv_class_alloc, |
91 | | const unsigned char *name); |
92 | | static reg_errcode_t build_charclass (RE_TRANSLATE_TYPE trans, |
93 | | bitset_t sbcset, |
94 | | re_charset_t *mbcset, |
95 | | Idx *char_class_alloc, |
96 | | const char *class_name, |
97 | | reg_syntax_t syntax); |
98 | | static bin_tree_t *build_charclass_op (re_dfa_t *dfa, |
99 | | RE_TRANSLATE_TYPE trans, |
100 | | const char *class_name, |
101 | | const char *extra, |
102 | | bool non_match, reg_errcode_t *err); |
103 | | static bin_tree_t *create_tree (re_dfa_t *dfa, |
104 | | bin_tree_t *left, bin_tree_t *right, |
105 | | re_token_type_t type); |
106 | | static bin_tree_t *create_token_tree (re_dfa_t *dfa, |
107 | | bin_tree_t *left, bin_tree_t *right, |
108 | | const re_token_t *token); |
109 | | static bin_tree_t *duplicate_tree (const bin_tree_t *src, re_dfa_t *dfa); |
110 | | static void free_token (re_token_t *node); |
111 | | static reg_errcode_t free_tree (void *extra, bin_tree_t *node); |
112 | | static reg_errcode_t mark_opt_subexp (void *extra, bin_tree_t *node); |
113 | | |
114 | | /* This table gives an error message for each of the error codes listed |
115 | | in regex.h. Obviously the order here has to be same as there. |
116 | | POSIX doesn't require that we do anything for REG_NOERROR, |
117 | | but why not be nice? */ |
118 | | |
119 | | static const char __re_error_msgid[] = |
120 | | { |
121 | | #define REG_NOERROR_IDX 0 |
122 | | gettext_noop ("Success") /* REG_NOERROR */ |
123 | | "\0" |
124 | | #define REG_NOMATCH_IDX (REG_NOERROR_IDX + sizeof "Success") |
125 | | gettext_noop ("No match") /* REG_NOMATCH */ |
126 | | "\0" |
127 | | #define REG_BADPAT_IDX (REG_NOMATCH_IDX + sizeof "No match") |
128 | | gettext_noop ("Invalid regular expression") /* REG_BADPAT */ |
129 | | "\0" |
130 | | #define REG_ECOLLATE_IDX (REG_BADPAT_IDX + sizeof "Invalid regular expression") |
131 | | gettext_noop ("Invalid collation character") /* REG_ECOLLATE */ |
132 | | "\0" |
133 | | #define REG_ECTYPE_IDX (REG_ECOLLATE_IDX + sizeof "Invalid collation character") |
134 | | gettext_noop ("Invalid character class name") /* REG_ECTYPE */ |
135 | | "\0" |
136 | | #define REG_EESCAPE_IDX (REG_ECTYPE_IDX + sizeof "Invalid character class name") |
137 | | gettext_noop ("Trailing backslash") /* REG_EESCAPE */ |
138 | | "\0" |
139 | | #define REG_ESUBREG_IDX (REG_EESCAPE_IDX + sizeof "Trailing backslash") |
140 | | gettext_noop ("Invalid back reference") /* REG_ESUBREG */ |
141 | | "\0" |
142 | | #define REG_EBRACK_IDX (REG_ESUBREG_IDX + sizeof "Invalid back reference") |
143 | | gettext_noop ("Unmatched [, [^, [:, [., or [=") /* REG_EBRACK */ |
144 | | "\0" |
145 | | #define REG_EPAREN_IDX (REG_EBRACK_IDX + sizeof "Unmatched [, [^, [:, [., or [=") |
146 | | gettext_noop ("Unmatched ( or \\(") /* REG_EPAREN */ |
147 | | "\0" |
148 | | #define REG_EBRACE_IDX (REG_EPAREN_IDX + sizeof "Unmatched ( or \\(") |
149 | | gettext_noop ("Unmatched \\{") /* REG_EBRACE */ |
150 | | "\0" |
151 | | #define REG_BADBR_IDX (REG_EBRACE_IDX + sizeof "Unmatched \\{") |
152 | | gettext_noop ("Invalid content of \\{\\}") /* REG_BADBR */ |
153 | | "\0" |
154 | | #define REG_ERANGE_IDX (REG_BADBR_IDX + sizeof "Invalid content of \\{\\}") |
155 | | gettext_noop ("Invalid range end") /* REG_ERANGE */ |
156 | | "\0" |
157 | | #define REG_ESPACE_IDX (REG_ERANGE_IDX + sizeof "Invalid range end") |
158 | | gettext_noop ("Memory exhausted") /* REG_ESPACE */ |
159 | | "\0" |
160 | | #define REG_BADRPT_IDX (REG_ESPACE_IDX + sizeof "Memory exhausted") |
161 | | gettext_noop ("Invalid preceding regular expression") /* REG_BADRPT */ |
162 | | "\0" |
163 | | #define REG_EEND_IDX (REG_BADRPT_IDX + sizeof "Invalid preceding regular expression") |
164 | | gettext_noop ("Premature end of regular expression") /* REG_EEND */ |
165 | | "\0" |
166 | | #define REG_ESIZE_IDX (REG_EEND_IDX + sizeof "Premature end of regular expression") |
167 | | gettext_noop ("Regular expression too big") /* REG_ESIZE */ |
168 | | "\0" |
169 | | #define REG_ERPAREN_IDX (REG_ESIZE_IDX + sizeof "Regular expression too big") |
170 | | gettext_noop ("Unmatched ) or \\)") /* REG_ERPAREN */ |
171 | | }; |
172 | | |
173 | | static const size_t __re_error_msgid_idx[] = |
174 | | { |
175 | | REG_NOERROR_IDX, |
176 | | REG_NOMATCH_IDX, |
177 | | REG_BADPAT_IDX, |
178 | | REG_ECOLLATE_IDX, |
179 | | REG_ECTYPE_IDX, |
180 | | REG_EESCAPE_IDX, |
181 | | REG_ESUBREG_IDX, |
182 | | REG_EBRACK_IDX, |
183 | | REG_EPAREN_IDX, |
184 | | REG_EBRACE_IDX, |
185 | | REG_BADBR_IDX, |
186 | | REG_ERANGE_IDX, |
187 | | REG_ESPACE_IDX, |
188 | | REG_BADRPT_IDX, |
189 | | REG_EEND_IDX, |
190 | | REG_ESIZE_IDX, |
191 | | REG_ERPAREN_IDX |
192 | | }; |
193 | | |
194 | | /* Entry points for GNU code. */ |
195 | | |
196 | | /* re_compile_pattern is the GNU regular expression compiler: it |
197 | | compiles PATTERN (of length LENGTH) and puts the result in BUFP. |
198 | | Returns 0 if the pattern was valid, otherwise an error string. |
199 | | |
200 | | Assumes the 'allocated' (and perhaps 'buffer') and 'translate' fields |
201 | | are set in BUFP on entry. */ |
202 | | |
203 | | const char * |
204 | | re_compile_pattern (const char *pattern, size_t length, |
205 | | struct re_pattern_buffer *bufp) |
206 | 12.7k | { |
207 | 12.7k | reg_errcode_t ret; |
208 | | |
209 | | /* And GNU code determines whether or not to get register information |
210 | | by passing null for the REGS argument to re_match, etc., not by |
211 | | setting no_sub, unless RE_NO_SUB is set. */ |
212 | 12.7k | bufp->no_sub = !!(re_syntax_options & RE_NO_SUB); |
213 | | |
214 | | /* Match anchors at newline. */ |
215 | 12.7k | bufp->newline_anchor = 1; |
216 | | |
217 | 12.7k | ret = re_compile_internal (bufp, pattern, length, re_syntax_options); |
218 | | |
219 | 12.7k | if (!ret) |
220 | 12.7k | return NULL; |
221 | 54 | return gettext (__re_error_msgid + __re_error_msgid_idx[(int) ret]); |
222 | 12.7k | } |
223 | | weak_alias (__re_compile_pattern, re_compile_pattern) |
224 | | |
225 | | /* Set by 're_set_syntax' to the current regexp syntax to recognize. Can |
226 | | also be assigned to arbitrarily: each pattern buffer stores its own |
227 | | syntax, so it can be changed between regex compilations. */ |
228 | | /* This has no initializer because initialized variables in Emacs |
229 | | become read-only after dumping. */ |
230 | | reg_syntax_t re_syntax_options; |
231 | | |
232 | | |
233 | | /* Specify the precise syntax of regexps for compilation. This provides |
234 | | for compatibility for various utilities which historically have |
235 | | different, incompatible syntaxes. |
236 | | |
237 | | The argument SYNTAX is a bit mask comprised of the various bits |
238 | | defined in regex.h. We return the old syntax. */ |
239 | | |
240 | | reg_syntax_t |
241 | | re_set_syntax (reg_syntax_t syntax) |
242 | 0 | { |
243 | 0 | reg_syntax_t ret = re_syntax_options; |
244 | |
|
245 | 0 | re_syntax_options = syntax; |
246 | 0 | return ret; |
247 | 0 | } |
248 | | weak_alias (__re_set_syntax, re_set_syntax) |
249 | | |
250 | | int |
251 | | re_compile_fastmap (struct re_pattern_buffer *bufp) |
252 | 0 | { |
253 | 0 | re_dfa_t *dfa = bufp->buffer; |
254 | 0 | char *fastmap = bufp->fastmap; |
255 | |
|
256 | 0 | memset (fastmap, '\0', sizeof (char) * SBC_MAX); |
257 | 0 | re_compile_fastmap_iter (bufp, dfa->init_state, fastmap); |
258 | 0 | if (dfa->init_state != dfa->init_state_word) |
259 | 0 | re_compile_fastmap_iter (bufp, dfa->init_state_word, fastmap); |
260 | 0 | if (dfa->init_state != dfa->init_state_nl) |
261 | 0 | re_compile_fastmap_iter (bufp, dfa->init_state_nl, fastmap); |
262 | 0 | if (dfa->init_state != dfa->init_state_begbuf) |
263 | 0 | re_compile_fastmap_iter (bufp, dfa->init_state_begbuf, fastmap); |
264 | 0 | bufp->fastmap_accurate = 1; |
265 | 0 | return 0; |
266 | 0 | } |
267 | | weak_alias (__re_compile_fastmap, re_compile_fastmap) |
268 | | |
269 | | static __always_inline void |
270 | | re_set_fastmap (char *fastmap, bool icase, int ch) |
271 | 0 | { |
272 | 0 | fastmap[ch] = 1; |
273 | 0 | if (icase) |
274 | 0 | fastmap[tolower (ch)] = 1; |
275 | 0 | } |
276 | | |
277 | | /* Helper function for re_compile_fastmap. |
278 | | Compile fastmap for the initial_state INIT_STATE. */ |
279 | | |
280 | | static void |
281 | | re_compile_fastmap_iter (regex_t *bufp, const re_dfastate_t *init_state, |
282 | | char *fastmap) |
283 | 0 | { |
284 | 0 | re_dfa_t *dfa = bufp->buffer; |
285 | 0 | Idx node_cnt; |
286 | 0 | bool icase = (dfa->mb_cur_max == 1 && (bufp->syntax & RE_ICASE)); |
287 | 0 | for (node_cnt = 0; node_cnt < init_state->nodes.nelem; ++node_cnt) |
288 | 0 | { |
289 | 0 | Idx node = init_state->nodes.elems[node_cnt]; |
290 | 0 | re_token_type_t type = dfa->nodes[node].type; |
291 | |
|
292 | 0 | if (type == CHARACTER) |
293 | 0 | { |
294 | 0 | re_set_fastmap (fastmap, icase, dfa->nodes[node].opr.c); |
295 | 0 | if ((bufp->syntax & RE_ICASE) && dfa->mb_cur_max > 1) |
296 | 0 | { |
297 | 0 | unsigned char buf[MB_LEN_MAX]; |
298 | 0 | unsigned char *p; |
299 | 0 | wchar_t wc; |
300 | 0 | mbstate_t state; |
301 | |
|
302 | 0 | p = buf; |
303 | 0 | *p++ = dfa->nodes[node].opr.c; |
304 | 0 | while (++node < dfa->nodes_len |
305 | 0 | && dfa->nodes[node].type == CHARACTER |
306 | 0 | && dfa->nodes[node].mb_partial) |
307 | 0 | *p++ = dfa->nodes[node].opr.c; |
308 | 0 | memset (&state, '\0', sizeof (state)); |
309 | 0 | if (__mbrtowc (&wc, (const char *) buf, p - buf, |
310 | 0 | &state) == p - buf |
311 | 0 | && (__wcrtomb ((char *) buf, __towlower (wc), &state) |
312 | 0 | != (size_t) -1)) |
313 | 0 | re_set_fastmap (fastmap, false, buf[0]); |
314 | 0 | } |
315 | 0 | } |
316 | 0 | else if (type == SIMPLE_BRACKET) |
317 | 0 | { |
318 | 0 | int i, ch; |
319 | 0 | for (i = 0, ch = 0; i < BITSET_WORDS; ++i) |
320 | 0 | { |
321 | 0 | int j; |
322 | 0 | bitset_word_t w = dfa->nodes[node].opr.sbcset[i]; |
323 | 0 | for (j = 0; j < BITSET_WORD_BITS; ++j, ++ch) |
324 | 0 | if (w & ((bitset_word_t) 1 << j)) |
325 | 0 | re_set_fastmap (fastmap, icase, ch); |
326 | 0 | } |
327 | 0 | } |
328 | 0 | else if (type == COMPLEX_BRACKET) |
329 | 0 | { |
330 | 0 | re_charset_t *cset = dfa->nodes[node].opr.mbcset; |
331 | 0 | Idx i; |
332 | |
|
333 | | #ifdef _LIBC |
334 | | /* See if we have to try all bytes which start multiple collation |
335 | | elements. |
336 | | e.g. In da_DK, we want to catch 'a' since "aa" is a valid |
337 | | collation element, and don't catch 'b' since 'b' is |
338 | | the only collation element which starts from 'b' (and |
339 | | it is caught by SIMPLE_BRACKET). */ |
340 | | if (_NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES) != 0 |
341 | | && (cset->ncoll_syms || cset->nranges)) |
342 | | { |
343 | | const int32_t *table = (const int32_t *) |
344 | | _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB); |
345 | | for (i = 0; i < SBC_MAX; ++i) |
346 | | if (table[i] < 0) |
347 | | re_set_fastmap (fastmap, icase, i); |
348 | | } |
349 | | #endif /* _LIBC */ |
350 | | |
351 | | /* See if we have to start the match at all multibyte characters, |
352 | | i.e. where we would not find an invalid sequence. This only |
353 | | applies to multibyte character sets; for single byte character |
354 | | sets, the SIMPLE_BRACKET again suffices. */ |
355 | 0 | if (dfa->mb_cur_max > 1 |
356 | 0 | && (cset->nchar_classes || cset->non_match || cset->nranges |
357 | | #ifdef _LIBC |
358 | | || cset->nequiv_classes |
359 | | #endif /* _LIBC */ |
360 | 0 | )) |
361 | 0 | { |
362 | 0 | unsigned char c = 0; |
363 | 0 | do |
364 | 0 | { |
365 | 0 | mbstate_t mbs; |
366 | 0 | memset (&mbs, 0, sizeof (mbs)); |
367 | 0 | if (__mbrtowc (NULL, (char *) &c, 1, &mbs) == (size_t) -2) |
368 | 0 | re_set_fastmap (fastmap, false, (int) c); |
369 | 0 | } |
370 | 0 | while (++c != 0); |
371 | 0 | } |
372 | | |
373 | 0 | else |
374 | 0 | { |
375 | | /* ... Else catch all bytes which can start the mbchars. */ |
376 | 0 | for (i = 0; i < cset->nmbchars; ++i) |
377 | 0 | { |
378 | 0 | char buf[256]; |
379 | 0 | mbstate_t state; |
380 | 0 | memset (&state, '\0', sizeof (state)); |
381 | 0 | if (__wcrtomb (buf, cset->mbchars[i], &state) != (size_t) -1) |
382 | 0 | re_set_fastmap (fastmap, icase, *(unsigned char *) buf); |
383 | 0 | if ((bufp->syntax & RE_ICASE) && dfa->mb_cur_max > 1) |
384 | 0 | { |
385 | 0 | if (__wcrtomb (buf, __towlower (cset->mbchars[i]), &state) |
386 | 0 | != (size_t) -1) |
387 | 0 | re_set_fastmap (fastmap, false, *(unsigned char *) buf); |
388 | 0 | } |
389 | 0 | } |
390 | 0 | } |
391 | 0 | } |
392 | 0 | else if (type == OP_PERIOD || type == OP_UTF8_PERIOD || type == END_OF_RE) |
393 | 0 | { |
394 | 0 | memset (fastmap, '\1', sizeof (char) * SBC_MAX); |
395 | 0 | if (type == END_OF_RE) |
396 | 0 | bufp->can_be_null = 1; |
397 | 0 | return; |
398 | 0 | } |
399 | 0 | } |
400 | 0 | } |
401 | | |
402 | | /* Entry point for POSIX code. */ |
403 | | /* regcomp takes a regular expression as a string and compiles it. |
404 | | |
405 | | PREG is a regex_t *. We do not expect any fields to be initialized, |
406 | | since POSIX says we shouldn't. Thus, we set |
407 | | |
408 | | 'buffer' to the compiled pattern; |
409 | | 'used' to the length of the compiled pattern; |
410 | | 'syntax' to RE_SYNTAX_POSIX_EXTENDED if the |
411 | | REG_EXTENDED bit in CFLAGS is set; otherwise, to |
412 | | RE_SYNTAX_POSIX_BASIC; |
413 | | 'newline_anchor' to REG_NEWLINE being set in CFLAGS; |
414 | | 'fastmap' to an allocated space for the fastmap; |
415 | | 'fastmap_accurate' to zero; |
416 | | 're_nsub' to the number of subexpressions in PATTERN. |
417 | | |
418 | | PATTERN is the address of the pattern string. |
419 | | |
420 | | CFLAGS is a series of bits which affect compilation. |
421 | | |
422 | | If REG_EXTENDED is set, we use POSIX extended syntax; otherwise, we |
423 | | use POSIX basic syntax. |
424 | | |
425 | | If REG_NEWLINE is set, then . and [^...] don't match newline. |
426 | | Also, regexec will try a match beginning after every newline. |
427 | | |
428 | | If REG_ICASE is set, then we considers upper- and lowercase |
429 | | versions of letters to be equivalent when matching. |
430 | | |
431 | | If REG_NOSUB is set, then when PREG is passed to regexec, that |
432 | | routine will report only success or failure, and nothing about the |
433 | | registers. |
434 | | |
435 | | It returns 0 if it succeeds, nonzero if it doesn't. (See regex.h for |
436 | | the return codes and their meanings.) */ |
437 | | |
438 | | int |
439 | | regcomp (regex_t *__restrict preg, const char *__restrict pattern, int cflags) |
440 | 0 | { |
441 | 0 | reg_errcode_t ret; |
442 | 0 | reg_syntax_t syntax = ((cflags & REG_EXTENDED) ? RE_SYNTAX_POSIX_EXTENDED |
443 | 0 | : RE_SYNTAX_POSIX_BASIC); |
444 | |
|
445 | 0 | preg->buffer = NULL; |
446 | 0 | preg->allocated = 0; |
447 | 0 | preg->used = 0; |
448 | | |
449 | | /* Try to allocate space for the fastmap. */ |
450 | 0 | preg->fastmap = re_malloc (char, SBC_MAX); |
451 | 0 | if (__glibc_unlikely (preg->fastmap == NULL)) |
452 | 0 | return REG_ESPACE; |
453 | | |
454 | 0 | syntax |= (cflags & REG_ICASE) ? RE_ICASE : 0; |
455 | | |
456 | | /* If REG_NEWLINE is set, newlines are treated differently. */ |
457 | 0 | if (cflags & REG_NEWLINE) |
458 | 0 | { /* REG_NEWLINE implies neither . nor [^...] match newline. */ |
459 | 0 | syntax &= ~RE_DOT_NEWLINE; |
460 | 0 | syntax |= RE_HAT_LISTS_NOT_NEWLINE; |
461 | | /* It also changes the matching behavior. */ |
462 | 0 | preg->newline_anchor = 1; |
463 | 0 | } |
464 | 0 | else |
465 | 0 | preg->newline_anchor = 0; |
466 | 0 | preg->no_sub = !!(cflags & REG_NOSUB); |
467 | 0 | preg->translate = NULL; |
468 | |
|
469 | 0 | ret = re_compile_internal (preg, pattern, strlen (pattern), syntax); |
470 | | |
471 | | /* POSIX doesn't distinguish between an unmatched open-group and an |
472 | | unmatched close-group: both are REG_EPAREN. */ |
473 | 0 | if (ret == REG_ERPAREN) |
474 | 0 | ret = REG_EPAREN; |
475 | | |
476 | | /* We have already checked preg->fastmap != NULL. */ |
477 | 0 | if (__glibc_likely (ret == REG_NOERROR)) |
478 | | /* Compute the fastmap now, since regexec cannot modify the pattern |
479 | | buffer. This function never fails in this implementation. */ |
480 | 0 | (void) re_compile_fastmap (preg); |
481 | 0 | else |
482 | 0 | { |
483 | | /* Some error occurred while compiling the expression. */ |
484 | 0 | re_free (preg->fastmap); |
485 | 0 | preg->fastmap = NULL; |
486 | 0 | } |
487 | |
|
488 | 0 | return (int) ret; |
489 | 0 | } |
490 | | libc_hidden_def (__regcomp) |
491 | | weak_alias (__regcomp, regcomp) |
492 | | |
493 | | /* Returns a message corresponding to an error code, ERRCODE, returned |
494 | | from either regcomp or regexec. We don't use PREG here. */ |
495 | | |
496 | | size_t |
497 | | regerror (int errcode, const regex_t *__restrict preg, char *__restrict errbuf, |
498 | | size_t errbuf_size) |
499 | 0 | { |
500 | 0 | const char *msg; |
501 | 0 | size_t msg_size; |
502 | 0 | int nerrcodes = sizeof __re_error_msgid_idx / sizeof __re_error_msgid_idx[0]; |
503 | |
|
504 | 0 | if (__glibc_unlikely (errcode < 0 || errcode >= nerrcodes)) |
505 | | /* Only error codes returned by the rest of the code should be passed |
506 | | to this routine. If we are given anything else, or if other regex |
507 | | code generates an invalid error code, then the program has a bug. |
508 | | Dump core so we can fix it. */ |
509 | 0 | abort (); |
510 | | |
511 | 0 | msg = gettext (__re_error_msgid + __re_error_msgid_idx[errcode]); |
512 | |
|
513 | 0 | msg_size = strlen (msg) + 1; /* Includes the null. */ |
514 | |
|
515 | 0 | if (__glibc_likely (errbuf_size != 0)) |
516 | 0 | { |
517 | 0 | size_t cpy_size = msg_size; |
518 | 0 | if (__glibc_unlikely (msg_size > errbuf_size)) |
519 | 0 | { |
520 | 0 | cpy_size = errbuf_size - 1; |
521 | 0 | errbuf[cpy_size] = '\0'; |
522 | 0 | } |
523 | 0 | memcpy (errbuf, msg, cpy_size); |
524 | 0 | } |
525 | |
|
526 | 0 | return msg_size; |
527 | 0 | } |
528 | | weak_alias (__regerror, regerror) |
529 | | |
530 | | |
531 | | /* This static array is used for the map to single-byte characters when |
532 | | UTF-8 is used. Otherwise we would allocate memory just to initialize |
533 | | it the same all the time. UTF-8 is the preferred encoding so this is |
534 | | a worthwhile optimization. */ |
535 | | static const bitset_t utf8_sb_map = |
536 | | { |
537 | | /* Set the first 128 bits. */ |
538 | | #if (defined __GNUC__ || __clang_major__ >= 4) && !defined __STRICT_ANSI__ |
539 | | [0 ... 0x80 / BITSET_WORD_BITS - 1] = BITSET_WORD_MAX |
540 | | #else |
541 | | # if 4 * BITSET_WORD_BITS < ASCII_CHARS |
542 | | # error "bitset_word_t is narrower than 32 bits" |
543 | | # elif 3 * BITSET_WORD_BITS < ASCII_CHARS |
544 | | BITSET_WORD_MAX, BITSET_WORD_MAX, BITSET_WORD_MAX, |
545 | | # elif 2 * BITSET_WORD_BITS < ASCII_CHARS |
546 | | BITSET_WORD_MAX, BITSET_WORD_MAX, |
547 | | # elif 1 * BITSET_WORD_BITS < ASCII_CHARS |
548 | | BITSET_WORD_MAX, |
549 | | # endif |
550 | | (BITSET_WORD_MAX |
551 | | >> (SBC_MAX % BITSET_WORD_BITS == 0 |
552 | | ? 0 |
553 | | : BITSET_WORD_BITS - SBC_MAX % BITSET_WORD_BITS)) |
554 | | #endif |
555 | | }; |
556 | | |
557 | | |
558 | | static void |
559 | | free_dfa_content (re_dfa_t *dfa) |
560 | 12.7k | { |
561 | 12.7k | Idx i, j; |
562 | | |
563 | 12.7k | if (dfa->nodes) |
564 | 5.04M | for (i = 0; i < dfa->nodes_len; ++i) |
565 | 5.03M | free_token (dfa->nodes + i); |
566 | 12.7k | re_free (dfa->nexts); |
567 | 5.04M | for (i = 0; i < dfa->nodes_len; ++i) |
568 | 5.03M | { |
569 | 5.03M | if (dfa->eclosures != NULL) |
570 | 5.03M | re_node_set_free (dfa->eclosures + i); |
571 | 5.03M | if (dfa->inveclosures != NULL) |
572 | 5.03M | re_node_set_free (dfa->inveclosures + i); |
573 | 5.03M | if (dfa->edests != NULL) |
574 | 5.03M | re_node_set_free (dfa->edests + i); |
575 | 5.03M | } |
576 | 12.7k | re_free (dfa->edests); |
577 | 12.7k | re_free (dfa->eclosures); |
578 | 12.7k | re_free (dfa->inveclosures); |
579 | 12.7k | re_free (dfa->nodes); |
580 | | |
581 | 12.7k | if (dfa->state_table) |
582 | 116M | for (i = 0; i <= dfa->state_hash_mask; ++i) |
583 | 116M | { |
584 | 116M | struct re_state_table_entry *entry = dfa->state_table + i; |
585 | 116M | for (j = 0; j < entry->num; ++j) |
586 | 161k | { |
587 | 161k | re_dfastate_t *state = entry->array[j]; |
588 | 161k | free_state (state); |
589 | 161k | } |
590 | 116M | re_free (entry->array); |
591 | 116M | } |
592 | 12.7k | re_free (dfa->state_table); |
593 | 12.7k | if (dfa->sb_char != utf8_sb_map) |
594 | 12.7k | re_free (dfa->sb_char); |
595 | 12.7k | re_free (dfa->subexp_map); |
596 | | #ifdef DEBUG |
597 | | re_free (dfa->re_str); |
598 | | #endif |
599 | | |
600 | 12.7k | re_free (dfa); |
601 | 12.7k | } |
602 | | |
603 | | |
604 | | /* Free dynamically allocated space used by PREG. */ |
605 | | |
606 | | void |
607 | | regfree (regex_t *preg) |
608 | 12.7k | { |
609 | 12.7k | re_dfa_t *dfa = preg->buffer; |
610 | 12.7k | if (__glibc_likely (dfa != NULL)) |
611 | 12.7k | { |
612 | 12.7k | lock_fini (dfa->lock); |
613 | 12.7k | free_dfa_content (dfa); |
614 | 12.7k | } |
615 | 12.7k | preg->buffer = NULL; |
616 | 12.7k | preg->allocated = 0; |
617 | | |
618 | 12.7k | re_free (preg->fastmap); |
619 | 12.7k | preg->fastmap = NULL; |
620 | | |
621 | 12.7k | re_free (preg->translate); |
622 | 12.7k | preg->translate = NULL; |
623 | 12.7k | } |
624 | | libc_hidden_def (__regfree) |
625 | | weak_alias (__regfree, regfree) |
626 | | |
627 | | /* Entry points compatible with 4.2 BSD regex library. We don't define |
628 | | them unless specifically requested. */ |
629 | | |
630 | | #if defined _REGEX_RE_COMP || defined _LIBC |
631 | | |
632 | | /* BSD has one and only one pattern buffer. */ |
633 | | static struct re_pattern_buffer re_comp_buf; |
634 | | |
635 | | char * |
636 | | # ifdef _LIBC |
637 | | /* Make these definitions weak in libc, so POSIX programs can redefine |
638 | | these names if they don't use our functions, and still use |
639 | | regcomp/regexec above without link errors. */ |
640 | | weak_function |
641 | | # endif |
642 | | re_comp (const char *s) |
643 | | { |
644 | | reg_errcode_t ret; |
645 | | char *fastmap; |
646 | | |
647 | | if (!s) |
648 | | { |
649 | | if (!re_comp_buf.buffer) |
650 | | return gettext ("No previous regular expression"); |
651 | | return 0; |
652 | | } |
653 | | |
654 | | if (re_comp_buf.buffer) |
655 | | { |
656 | | fastmap = re_comp_buf.fastmap; |
657 | | re_comp_buf.fastmap = NULL; |
658 | | __regfree (&re_comp_buf); |
659 | | memset (&re_comp_buf, '\0', sizeof (re_comp_buf)); |
660 | | re_comp_buf.fastmap = fastmap; |
661 | | } |
662 | | |
663 | | if (re_comp_buf.fastmap == NULL) |
664 | | { |
665 | | re_comp_buf.fastmap = re_malloc (char, SBC_MAX); |
666 | | if (re_comp_buf.fastmap == NULL) |
667 | | return (char *) gettext (__re_error_msgid |
668 | | + __re_error_msgid_idx[(int) REG_ESPACE]); |
669 | | } |
670 | | |
671 | | /* Since 're_exec' always passes NULL for the 'regs' argument, we |
672 | | don't need to initialize the pattern buffer fields which affect it. */ |
673 | | |
674 | | /* Match anchors at newlines. */ |
675 | | re_comp_buf.newline_anchor = 1; |
676 | | |
677 | | ret = re_compile_internal (&re_comp_buf, s, strlen (s), re_syntax_options); |
678 | | |
679 | | if (!ret) |
680 | | return NULL; |
681 | | |
682 | | /* Yes, we're discarding 'const' here if !HAVE_LIBINTL. */ |
683 | | return (char *) gettext (__re_error_msgid + __re_error_msgid_idx[(int) ret]); |
684 | | } |
685 | | |
686 | | #ifdef _LIBC |
687 | | libc_freeres_fn (free_mem) |
688 | | { |
689 | | __regfree (&re_comp_buf); |
690 | | } |
691 | | #endif |
692 | | |
693 | | #endif /* _REGEX_RE_COMP */ |
694 | | |
695 | | /* Internal entry point. |
696 | | Compile the regular expression PATTERN, whose length is LENGTH. |
697 | | SYNTAX indicate regular expression's syntax. */ |
698 | | |
699 | | static reg_errcode_t |
700 | | re_compile_internal (regex_t *preg, const char * pattern, size_t length, |
701 | | reg_syntax_t syntax) |
702 | 12.7k | { |
703 | 12.7k | reg_errcode_t err = REG_NOERROR; |
704 | 12.7k | re_dfa_t *dfa; |
705 | 12.7k | re_string_t regexp; |
706 | | |
707 | | /* Initialize the pattern buffer. */ |
708 | 12.7k | preg->fastmap_accurate = 0; |
709 | 12.7k | preg->syntax = syntax; |
710 | 12.7k | preg->not_bol = preg->not_eol = 0; |
711 | 12.7k | preg->used = 0; |
712 | 12.7k | preg->re_nsub = 0; |
713 | 12.7k | preg->can_be_null = 0; |
714 | 12.7k | preg->regs_allocated = REGS_UNALLOCATED; |
715 | | |
716 | | /* Initialize the dfa. */ |
717 | 12.7k | dfa = preg->buffer; |
718 | 12.7k | if (__glibc_unlikely (preg->allocated < sizeof (re_dfa_t))) |
719 | 12.7k | { |
720 | | /* If zero allocated, but buffer is non-null, try to realloc |
721 | | enough space. This loses if buffer's address is bogus, but |
722 | | that is the user's responsibility. If ->buffer is NULL this |
723 | | is a simple allocation. */ |
724 | 12.7k | dfa = re_realloc (preg->buffer, re_dfa_t, 1); |
725 | 12.7k | if (dfa == NULL) |
726 | 0 | return REG_ESPACE; |
727 | 12.7k | preg->allocated = sizeof (re_dfa_t); |
728 | 12.7k | preg->buffer = dfa; |
729 | 12.7k | } |
730 | 12.7k | preg->used = sizeof (re_dfa_t); |
731 | | |
732 | 12.7k | err = init_dfa (dfa, length); |
733 | 12.7k | if (__glibc_unlikely (err == REG_NOERROR && lock_init (dfa->lock) != 0)) |
734 | 0 | err = REG_ESPACE; |
735 | 12.7k | if (__glibc_unlikely (err != REG_NOERROR)) |
736 | 0 | { |
737 | 0 | free_dfa_content (dfa); |
738 | 0 | preg->buffer = NULL; |
739 | 0 | preg->allocated = 0; |
740 | 0 | return err; |
741 | 0 | } |
742 | | #ifdef DEBUG |
743 | | /* Note: length+1 will not overflow since it is checked in init_dfa. */ |
744 | | dfa->re_str = re_malloc (char, length + 1); |
745 | | strncpy (dfa->re_str, pattern, length + 1); |
746 | | #endif |
747 | | |
748 | 12.7k | err = re_string_construct (®exp, pattern, length, preg->translate, |
749 | 12.7k | (syntax & RE_ICASE) != 0, dfa); |
750 | 12.7k | if (__glibc_unlikely (err != REG_NOERROR)) |
751 | 0 | { |
752 | 54 | re_compile_internal_free_return: |
753 | 54 | free_workarea_compile (preg); |
754 | 54 | re_string_destruct (®exp); |
755 | 54 | lock_fini (dfa->lock); |
756 | 54 | free_dfa_content (dfa); |
757 | 54 | preg->buffer = NULL; |
758 | 54 | preg->allocated = 0; |
759 | 54 | return err; |
760 | 0 | } |
761 | | |
762 | | /* Parse the regular expression, and build a structure tree. */ |
763 | 12.7k | preg->re_nsub = 0; |
764 | 12.7k | dfa->str_tree = parse (®exp, preg, syntax, &err); |
765 | 12.7k | if (__glibc_unlikely (dfa->str_tree == NULL)) |
766 | 54 | goto re_compile_internal_free_return; |
767 | | |
768 | | /* Analyze the tree and create the nfa. */ |
769 | 12.7k | err = analyze (preg); |
770 | 12.7k | if (__glibc_unlikely (err != REG_NOERROR)) |
771 | 0 | goto re_compile_internal_free_return; |
772 | | |
773 | | /* If possible, do searching in single byte encoding to speed things up. */ |
774 | 12.7k | if (dfa->is_utf8 && !(syntax & RE_ICASE) && preg->translate == NULL) |
775 | 0 | optimize_utf8 (dfa); |
776 | | |
777 | | /* Then create the initial state of the dfa. */ |
778 | 12.7k | err = create_initial_state (dfa); |
779 | | |
780 | | /* Release work areas. */ |
781 | 12.7k | free_workarea_compile (preg); |
782 | 12.7k | re_string_destruct (®exp); |
783 | | |
784 | 12.7k | if (__glibc_unlikely (err != REG_NOERROR)) |
785 | 0 | { |
786 | 0 | lock_fini (dfa->lock); |
787 | 0 | free_dfa_content (dfa); |
788 | 0 | preg->buffer = NULL; |
789 | 0 | preg->allocated = 0; |
790 | 0 | } |
791 | | |
792 | 12.7k | return err; |
793 | 12.7k | } |
794 | | |
795 | | /* Initialize DFA. We use the length of the regular expression PAT_LEN |
796 | | as the initial length of some arrays. */ |
797 | | |
798 | | static reg_errcode_t |
799 | | init_dfa (re_dfa_t *dfa, size_t pat_len) |
800 | 12.7k | { |
801 | 12.7k | __re_size_t table_size; |
802 | 12.7k | #ifndef _LIBC |
803 | 12.7k | const char *codeset_name; |
804 | 12.7k | #endif |
805 | 12.7k | size_t max_i18n_object_size = MAX (sizeof (wchar_t), sizeof (wctype_t)); |
806 | 12.7k | size_t max_object_size = |
807 | 12.7k | MAX (sizeof (struct re_state_table_entry), |
808 | 12.7k | MAX (sizeof (re_token_t), |
809 | 12.7k | MAX (sizeof (re_node_set), |
810 | 12.7k | MAX (sizeof (regmatch_t), |
811 | 12.7k | max_i18n_object_size)))); |
812 | | |
813 | 12.7k | memset (dfa, '\0', sizeof (re_dfa_t)); |
814 | | |
815 | | /* Force allocation of str_tree_storage the first time. */ |
816 | 12.7k | dfa->str_tree_storage_idx = BIN_TREE_STORAGE_SIZE; |
817 | | |
818 | | /* Avoid overflows. The extra "/ 2" is for the table_size doubling |
819 | | calculation below, and for similar doubling calculations |
820 | | elsewhere. And it's <= rather than <, because some of the |
821 | | doubling calculations add 1 afterwards. */ |
822 | 12.7k | if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / max_object_size) / 2 |
823 | 12.7k | <= pat_len)) |
824 | 0 | return REG_ESPACE; |
825 | | |
826 | 12.7k | dfa->nodes_alloc = pat_len + 1; |
827 | 12.7k | dfa->nodes = re_malloc (re_token_t, dfa->nodes_alloc); |
828 | | |
829 | | /* table_size = 2 ^ ceil(log pat_len) */ |
830 | 53.4k | for (table_size = 1; ; table_size <<= 1) |
831 | 66.2k | if (table_size > pat_len) |
832 | 12.7k | break; |
833 | | |
834 | 12.7k | dfa->state_table = calloc (sizeof (struct re_state_table_entry), table_size); |
835 | 12.7k | dfa->state_hash_mask = table_size - 1; |
836 | | |
837 | 12.7k | dfa->mb_cur_max = MB_CUR_MAX; |
838 | | #ifdef _LIBC |
839 | | if (dfa->mb_cur_max == 6 |
840 | | && strcmp (_NL_CURRENT (LC_CTYPE, _NL_CTYPE_CODESET_NAME), "UTF-8") == 0) |
841 | | dfa->is_utf8 = 1; |
842 | | dfa->map_notascii = (_NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_MAP_TO_NONASCII) |
843 | | != 0); |
844 | | #else |
845 | 12.7k | codeset_name = nl_langinfo (CODESET); |
846 | 12.7k | if ((codeset_name[0] == 'U' || codeset_name[0] == 'u') |
847 | 12.7k | && (codeset_name[1] == 'T' || codeset_name[1] == 't') |
848 | 12.7k | && (codeset_name[2] == 'F' || codeset_name[2] == 'f') |
849 | 12.7k | && strcmp (codeset_name + 3 + (codeset_name[3] == '-'), "8") == 0) |
850 | 0 | dfa->is_utf8 = 1; |
851 | | |
852 | | /* We check exhaustively in the loop below if this charset is a |
853 | | superset of ASCII. */ |
854 | 12.7k | dfa->map_notascii = 0; |
855 | 12.7k | #endif |
856 | | |
857 | 12.7k | if (dfa->mb_cur_max > 1) |
858 | 0 | { |
859 | 0 | if (dfa->is_utf8) |
860 | 0 | dfa->sb_char = (re_bitset_ptr_t) utf8_sb_map; |
861 | 0 | else |
862 | 0 | { |
863 | 0 | int i, j, ch; |
864 | |
|
865 | 0 | dfa->sb_char = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1); |
866 | 0 | if (__glibc_unlikely (dfa->sb_char == NULL)) |
867 | 0 | return REG_ESPACE; |
868 | | |
869 | | /* Set the bits corresponding to single byte chars. */ |
870 | 0 | for (i = 0, ch = 0; i < BITSET_WORDS; ++i) |
871 | 0 | for (j = 0; j < BITSET_WORD_BITS; ++j, ++ch) |
872 | 0 | { |
873 | 0 | wint_t wch = __btowc (ch); |
874 | 0 | if (wch != WEOF) |
875 | 0 | dfa->sb_char[i] |= (bitset_word_t) 1 << j; |
876 | 0 | #ifndef _LIBC |
877 | 0 | if (isascii (ch) && wch != ch) |
878 | 0 | dfa->map_notascii = 1; |
879 | 0 | #endif |
880 | 0 | } |
881 | 0 | } |
882 | 0 | } |
883 | | |
884 | 12.7k | if (__glibc_unlikely (dfa->nodes == NULL || dfa->state_table == NULL)) |
885 | 0 | return REG_ESPACE; |
886 | 12.7k | return REG_NOERROR; |
887 | 12.7k | } |
888 | | |
889 | | /* Initialize WORD_CHAR table, which indicate which character is |
890 | | "word". In this case "word" means that it is the word construction |
891 | | character used by some operators like "\<", "\>", etc. */ |
892 | | |
893 | | static void |
894 | | init_word_char (re_dfa_t *dfa) |
895 | 0 | { |
896 | 0 | int i = 0; |
897 | 0 | int j; |
898 | 0 | int ch = 0; |
899 | 0 | dfa->word_ops_used = 1; |
900 | 0 | if (__glibc_likely (dfa->map_notascii == 0)) |
901 | 0 | { |
902 | 0 | bitset_word_t bits0 = 0x00000000; |
903 | 0 | bitset_word_t bits1 = 0x03ff0000; |
904 | 0 | bitset_word_t bits2 = 0x87fffffe; |
905 | 0 | bitset_word_t bits3 = 0x07fffffe; |
906 | 0 | if (BITSET_WORD_BITS == 64) |
907 | 0 | { |
908 | | /* Pacify gcc -Woverflow on 32-bit platformns. */ |
909 | 0 | dfa->word_char[0] = bits1 << 31 << 1 | bits0; |
910 | 0 | dfa->word_char[1] = bits3 << 31 << 1 | bits2; |
911 | 0 | i = 2; |
912 | 0 | } |
913 | 0 | else if (BITSET_WORD_BITS == 32) |
914 | 0 | { |
915 | 0 | dfa->word_char[0] = bits0; |
916 | 0 | dfa->word_char[1] = bits1; |
917 | 0 | dfa->word_char[2] = bits2; |
918 | 0 | dfa->word_char[3] = bits3; |
919 | 0 | i = 4; |
920 | 0 | } |
921 | 0 | else |
922 | 0 | goto general_case; |
923 | 0 | ch = 128; |
924 | |
|
925 | 0 | if (__glibc_likely (dfa->is_utf8)) |
926 | 0 | { |
927 | 0 | memset (&dfa->word_char[i], '\0', (SBC_MAX - ch) / 8); |
928 | 0 | return; |
929 | 0 | } |
930 | 0 | } |
931 | | |
932 | 0 | general_case: |
933 | 0 | for (; i < BITSET_WORDS; ++i) |
934 | 0 | for (j = 0; j < BITSET_WORD_BITS; ++j, ++ch) |
935 | 0 | if (isalnum (ch) || ch == '_') |
936 | 0 | dfa->word_char[i] |= (bitset_word_t) 1 << j; |
937 | 0 | } |
938 | | |
939 | | /* Free the work area which are only used while compiling. */ |
940 | | |
941 | | static void |
942 | | free_workarea_compile (regex_t *preg) |
943 | 12.7k | { |
944 | 12.7k | re_dfa_t *dfa = preg->buffer; |
945 | 12.7k | bin_tree_storage_t *storage, *next; |
946 | 1.09M | for (storage = dfa->str_tree_storage; storage; storage = next) |
947 | 1.07M | { |
948 | 1.07M | next = storage->next; |
949 | 1.07M | re_free (storage); |
950 | 1.07M | } |
951 | 12.7k | dfa->str_tree_storage = NULL; |
952 | 12.7k | dfa->str_tree_storage_idx = BIN_TREE_STORAGE_SIZE; |
953 | 12.7k | dfa->str_tree = NULL; |
954 | 12.7k | re_free (dfa->org_indices); |
955 | 12.7k | dfa->org_indices = NULL; |
956 | 12.7k | } |
957 | | |
958 | | /* Create initial states for all contexts. */ |
959 | | |
960 | | static reg_errcode_t |
961 | | create_initial_state (re_dfa_t *dfa) |
962 | 12.7k | { |
963 | 12.7k | Idx first, i; |
964 | 12.7k | reg_errcode_t err; |
965 | 12.7k | re_node_set init_nodes; |
966 | | |
967 | | /* Initial states have the epsilon closure of the node which is |
968 | | the first node of the regular expression. */ |
969 | 12.7k | first = dfa->str_tree->first->node_idx; |
970 | 12.7k | dfa->init_node = first; |
971 | 12.7k | err = re_node_set_init_copy (&init_nodes, dfa->eclosures + first); |
972 | 12.7k | if (__glibc_unlikely (err != REG_NOERROR)) |
973 | 0 | return err; |
974 | | |
975 | | /* The back-references which are in initial states can epsilon transit, |
976 | | since in this case all of the subexpressions can be null. |
977 | | Then we add epsilon closures of the nodes which are the next nodes of |
978 | | the back-references. */ |
979 | 12.7k | if (dfa->nbackref > 0) |
980 | 0 | for (i = 0; i < init_nodes.nelem; ++i) |
981 | 0 | { |
982 | 0 | Idx node_idx = init_nodes.elems[i]; |
983 | 0 | re_token_type_t type = dfa->nodes[node_idx].type; |
984 | |
|
985 | 0 | Idx clexp_idx; |
986 | 0 | if (type != OP_BACK_REF) |
987 | 0 | continue; |
988 | 0 | for (clexp_idx = 0; clexp_idx < init_nodes.nelem; ++clexp_idx) |
989 | 0 | { |
990 | 0 | re_token_t *clexp_node; |
991 | 0 | clexp_node = dfa->nodes + init_nodes.elems[clexp_idx]; |
992 | 0 | if (clexp_node->type == OP_CLOSE_SUBEXP |
993 | 0 | && clexp_node->opr.idx == dfa->nodes[node_idx].opr.idx) |
994 | 0 | break; |
995 | 0 | } |
996 | 0 | if (clexp_idx == init_nodes.nelem) |
997 | 0 | continue; |
998 | | |
999 | 0 | if (type == OP_BACK_REF) |
1000 | 0 | { |
1001 | 0 | Idx dest_idx = dfa->edests[node_idx].elems[0]; |
1002 | 0 | if (!re_node_set_contains (&init_nodes, dest_idx)) |
1003 | 0 | { |
1004 | 0 | reg_errcode_t merge_err |
1005 | 0 | = re_node_set_merge (&init_nodes, dfa->eclosures + dest_idx); |
1006 | 0 | if (merge_err != REG_NOERROR) |
1007 | 0 | return merge_err; |
1008 | 0 | i = 0; |
1009 | 0 | } |
1010 | 0 | } |
1011 | 0 | } |
1012 | | |
1013 | | /* It must be the first time to invoke acquire_state. */ |
1014 | 12.7k | dfa->init_state = re_acquire_state_context (&err, dfa, &init_nodes, 0); |
1015 | | /* We don't check ERR here, since the initial state must not be NULL. */ |
1016 | 12.7k | if (__glibc_unlikely (dfa->init_state == NULL)) |
1017 | 0 | return err; |
1018 | 12.7k | if (dfa->init_state->has_constraint) |
1019 | 229 | { |
1020 | 229 | dfa->init_state_word = re_acquire_state_context (&err, dfa, &init_nodes, |
1021 | 229 | CONTEXT_WORD); |
1022 | 229 | dfa->init_state_nl = re_acquire_state_context (&err, dfa, &init_nodes, |
1023 | 229 | CONTEXT_NEWLINE); |
1024 | 229 | dfa->init_state_begbuf = re_acquire_state_context (&err, dfa, |
1025 | 229 | &init_nodes, |
1026 | 229 | CONTEXT_NEWLINE |
1027 | 229 | | CONTEXT_BEGBUF); |
1028 | 229 | if (__glibc_unlikely (dfa->init_state_word == NULL |
1029 | 229 | || dfa->init_state_nl == NULL |
1030 | 229 | || dfa->init_state_begbuf == NULL)) |
1031 | 0 | return err; |
1032 | 229 | } |
1033 | 12.4k | else |
1034 | 12.4k | dfa->init_state_word = dfa->init_state_nl |
1035 | 12.4k | = dfa->init_state_begbuf = dfa->init_state; |
1036 | | |
1037 | 12.7k | re_node_set_free (&init_nodes); |
1038 | 12.7k | return REG_NOERROR; |
1039 | 12.7k | } |
1040 | | |
1041 | | /* If it is possible to do searching in single byte encoding instead of UTF-8 |
1042 | | to speed things up, set dfa->mb_cur_max to 1, clear is_utf8 and change |
1043 | | DFA nodes where needed. */ |
1044 | | |
1045 | | static void |
1046 | | optimize_utf8 (re_dfa_t *dfa) |
1047 | 0 | { |
1048 | 0 | Idx node; |
1049 | 0 | int i; |
1050 | 0 | bool mb_chars = false; |
1051 | 0 | bool has_period = false; |
1052 | |
|
1053 | 0 | for (node = 0; node < dfa->nodes_len; ++node) |
1054 | 0 | switch (dfa->nodes[node].type) |
1055 | 0 | { |
1056 | 0 | case CHARACTER: |
1057 | 0 | if (dfa->nodes[node].opr.c >= ASCII_CHARS) |
1058 | 0 | mb_chars = true; |
1059 | 0 | break; |
1060 | 0 | case ANCHOR: |
1061 | 0 | switch (dfa->nodes[node].opr.ctx_type) |
1062 | 0 | { |
1063 | 0 | case LINE_FIRST: |
1064 | 0 | case LINE_LAST: |
1065 | 0 | case BUF_FIRST: |
1066 | 0 | case BUF_LAST: |
1067 | 0 | break; |
1068 | 0 | default: |
1069 | | /* Word anchors etc. cannot be handled. It's okay to test |
1070 | | opr.ctx_type since constraints (for all DFA nodes) are |
1071 | | created by ORing one or more opr.ctx_type values. */ |
1072 | 0 | return; |
1073 | 0 | } |
1074 | 0 | break; |
1075 | 0 | case OP_PERIOD: |
1076 | 0 | has_period = true; |
1077 | 0 | break; |
1078 | 0 | case OP_BACK_REF: |
1079 | 0 | case OP_ALT: |
1080 | 0 | case END_OF_RE: |
1081 | 0 | case OP_DUP_ASTERISK: |
1082 | 0 | case OP_OPEN_SUBEXP: |
1083 | 0 | case OP_CLOSE_SUBEXP: |
1084 | 0 | break; |
1085 | 0 | case COMPLEX_BRACKET: |
1086 | 0 | return; |
1087 | 0 | case SIMPLE_BRACKET: |
1088 | | /* Just double check. */ |
1089 | 0 | { |
1090 | 0 | int rshift = (ASCII_CHARS % BITSET_WORD_BITS == 0 |
1091 | 0 | ? 0 |
1092 | 0 | : BITSET_WORD_BITS - ASCII_CHARS % BITSET_WORD_BITS); |
1093 | 0 | for (i = ASCII_CHARS / BITSET_WORD_BITS; i < BITSET_WORDS; ++i) |
1094 | 0 | { |
1095 | 0 | if (dfa->nodes[node].opr.sbcset[i] >> rshift != 0) |
1096 | 0 | return; |
1097 | 0 | rshift = 0; |
1098 | 0 | } |
1099 | 0 | } |
1100 | 0 | break; |
1101 | 0 | default: |
1102 | 0 | abort (); |
1103 | 0 | } |
1104 | | |
1105 | 0 | if (mb_chars || has_period) |
1106 | 0 | for (node = 0; node < dfa->nodes_len; ++node) |
1107 | 0 | { |
1108 | 0 | if (dfa->nodes[node].type == CHARACTER |
1109 | 0 | && dfa->nodes[node].opr.c >= ASCII_CHARS) |
1110 | 0 | dfa->nodes[node].mb_partial = 0; |
1111 | 0 | else if (dfa->nodes[node].type == OP_PERIOD) |
1112 | 0 | dfa->nodes[node].type = OP_UTF8_PERIOD; |
1113 | 0 | } |
1114 | | |
1115 | | /* The search can be in single byte locale. */ |
1116 | 0 | dfa->mb_cur_max = 1; |
1117 | 0 | dfa->is_utf8 = 0; |
1118 | 0 | dfa->has_mb_node = dfa->nbackref > 0 || has_period; |
1119 | 0 | } |
1120 | | |
1121 | | /* Analyze the structure tree, and calculate "first", "next", "edest", |
1122 | | "eclosure", and "inveclosure". */ |
1123 | | |
1124 | | static reg_errcode_t |
1125 | | analyze (regex_t *preg) |
1126 | 12.7k | { |
1127 | 12.7k | re_dfa_t *dfa = preg->buffer; |
1128 | 12.7k | reg_errcode_t ret; |
1129 | | |
1130 | | /* Allocate arrays. */ |
1131 | 12.7k | dfa->nexts = re_malloc (Idx, dfa->nodes_alloc); |
1132 | 12.7k | dfa->org_indices = re_malloc (Idx, dfa->nodes_alloc); |
1133 | 12.7k | dfa->edests = re_malloc (re_node_set, dfa->nodes_alloc); |
1134 | 12.7k | dfa->eclosures = re_malloc (re_node_set, dfa->nodes_alloc); |
1135 | 12.7k | if (__glibc_unlikely (dfa->nexts == NULL || dfa->org_indices == NULL |
1136 | 12.7k | || dfa->edests == NULL || dfa->eclosures == NULL)) |
1137 | 0 | return REG_ESPACE; |
1138 | | |
1139 | 12.7k | dfa->subexp_map = re_malloc (Idx, preg->re_nsub); |
1140 | 12.7k | if (dfa->subexp_map != NULL) |
1141 | 12.7k | { |
1142 | 12.7k | Idx i; |
1143 | 14.9k | for (i = 0; i < preg->re_nsub; i++) |
1144 | 2.19k | dfa->subexp_map[i] = i; |
1145 | 12.7k | preorder (dfa->str_tree, optimize_subexps, dfa); |
1146 | 14.7k | for (i = 0; i < preg->re_nsub; i++) |
1147 | 2.04k | if (dfa->subexp_map[i] != i) |
1148 | 16 | break; |
1149 | 12.7k | if (i == preg->re_nsub) |
1150 | 12.6k | { |
1151 | 12.6k | re_free (dfa->subexp_map); |
1152 | 12.6k | dfa->subexp_map = NULL; |
1153 | 12.6k | } |
1154 | 12.7k | } |
1155 | | |
1156 | 12.7k | ret = postorder (dfa->str_tree, lower_subexps, preg); |
1157 | 12.7k | if (__glibc_unlikely (ret != REG_NOERROR)) |
1158 | 0 | return ret; |
1159 | 12.7k | ret = postorder (dfa->str_tree, calc_first, dfa); |
1160 | 12.7k | if (__glibc_unlikely (ret != REG_NOERROR)) |
1161 | 0 | return ret; |
1162 | 12.7k | preorder (dfa->str_tree, calc_next, dfa); |
1163 | 12.7k | ret = preorder (dfa->str_tree, link_nfa_nodes, dfa); |
1164 | 12.7k | if (__glibc_unlikely (ret != REG_NOERROR)) |
1165 | 0 | return ret; |
1166 | 12.7k | ret = calc_eclosure (dfa); |
1167 | 12.7k | if (__glibc_unlikely (ret != REG_NOERROR)) |
1168 | 0 | return ret; |
1169 | | |
1170 | | /* We only need this during the prune_impossible_nodes pass in regexec.c; |
1171 | | skip it if p_i_n will not run, as calc_inveclosure can be quadratic. */ |
1172 | 12.7k | if ((!preg->no_sub && preg->re_nsub > 0 && dfa->has_plural_match) |
1173 | 12.7k | || dfa->nbackref) |
1174 | 246 | { |
1175 | 246 | dfa->inveclosures = re_malloc (re_node_set, dfa->nodes_len); |
1176 | 246 | if (__glibc_unlikely (dfa->inveclosures == NULL)) |
1177 | 0 | return REG_ESPACE; |
1178 | 246 | ret = calc_inveclosure (dfa); |
1179 | 246 | } |
1180 | | |
1181 | 12.7k | return ret; |
1182 | 12.7k | } |
1183 | | |
1184 | | /* Our parse trees are very unbalanced, so we cannot use a stack to |
1185 | | implement parse tree visits. Instead, we use parent pointers and |
1186 | | some hairy code in these two functions. */ |
1187 | | static reg_errcode_t |
1188 | | postorder (bin_tree_t *root, reg_errcode_t (fn (void *, bin_tree_t *)), |
1189 | | void *extra) |
1190 | 40.6k | { |
1191 | 40.6k | bin_tree_t *node, *prev; |
1192 | | |
1193 | 40.6k | for (node = root; ; ) |
1194 | 13.3M | { |
1195 | | /* Descend down the tree, preferably to the left (or to the right |
1196 | | if that's the only child). */ |
1197 | 28.3M | while (node->left || node->right) |
1198 | 14.9M | if (node->left) |
1199 | 14.9M | node = node->left; |
1200 | 230 | else |
1201 | 230 | node = node->right; |
1202 | | |
1203 | 13.3M | do |
1204 | 28.3M | { |
1205 | 28.3M | reg_errcode_t err = fn (extra, node); |
1206 | 28.3M | if (__glibc_unlikely (err != REG_NOERROR)) |
1207 | 0 | return err; |
1208 | 28.3M | if (node->parent == NULL) |
1209 | 40.6k | return REG_NOERROR; |
1210 | 28.2M | prev = node; |
1211 | 28.2M | node = node->parent; |
1212 | 28.2M | } |
1213 | | /* Go up while we have a node that is reached from the right. */ |
1214 | 28.2M | while (node->right == prev || node->right == NULL); |
1215 | 13.3M | node = node->right; |
1216 | 13.3M | } |
1217 | 40.6k | } |
1218 | | |
1219 | | static reg_errcode_t |
1220 | | preorder (bin_tree_t *root, reg_errcode_t (fn (void *, bin_tree_t *)), |
1221 | | void *extra) |
1222 | 38.1k | { |
1223 | 38.1k | bin_tree_t *node; |
1224 | | |
1225 | 38.1k | for (node = root; ; ) |
1226 | 29.8M | { |
1227 | 29.8M | reg_errcode_t err = fn (extra, node); |
1228 | 29.8M | if (__glibc_unlikely (err != REG_NOERROR)) |
1229 | 0 | return err; |
1230 | | |
1231 | | /* Go to the left node, or up and to the right. */ |
1232 | 29.8M | if (node->left) |
1233 | 14.9M | node = node->left; |
1234 | 14.9M | else |
1235 | 14.9M | { |
1236 | 14.9M | bin_tree_t *prev = NULL; |
1237 | 44.7M | while (node->right == prev || node->right == NULL) |
1238 | 29.8M | { |
1239 | 29.8M | prev = node; |
1240 | 29.8M | node = node->parent; |
1241 | 29.8M | if (!node) |
1242 | 38.1k | return REG_NOERROR; |
1243 | 29.8M | } |
1244 | 14.8M | node = node->right; |
1245 | 14.8M | } |
1246 | 29.8M | } |
1247 | 38.1k | } |
1248 | | |
1249 | | /* Optimization pass: if a SUBEXP is entirely contained, strip it and tell |
1250 | | re_search_internal to map the inner one's opr.idx to this one's. Adjust |
1251 | | backreferences as well. Requires a preorder visit. */ |
1252 | | static reg_errcode_t |
1253 | | optimize_subexps (void *extra, bin_tree_t *node) |
1254 | 9.95M | { |
1255 | 9.95M | re_dfa_t *dfa = (re_dfa_t *) extra; |
1256 | | |
1257 | 9.95M | if (node->token.type == OP_BACK_REF && dfa->subexp_map) |
1258 | 0 | { |
1259 | 0 | int idx = node->token.opr.idx; |
1260 | 0 | node->token.opr.idx = dfa->subexp_map[idx]; |
1261 | 0 | dfa->used_bkref_map |= 1 << node->token.opr.idx; |
1262 | 0 | } |
1263 | | |
1264 | 9.95M | else if (node->token.type == SUBEXP |
1265 | 9.95M | && node->left && node->left->token.type == SUBEXP) |
1266 | 27 | { |
1267 | 27 | Idx other_idx = node->left->token.opr.idx; |
1268 | | |
1269 | 27 | node->left = node->left->left; |
1270 | 27 | if (node->left) |
1271 | 26 | node->left->parent = node; |
1272 | | |
1273 | 27 | dfa->subexp_map[other_idx] = dfa->subexp_map[node->token.opr.idx]; |
1274 | 27 | if (other_idx < BITSET_WORD_BITS) |
1275 | 27 | dfa->used_bkref_map &= ~((bitset_word_t) 1 << other_idx); |
1276 | 27 | } |
1277 | | |
1278 | 9.95M | return REG_NOERROR; |
1279 | 9.95M | } |
1280 | | |
1281 | | /* Lowering pass: Turn each SUBEXP node into the appropriate concatenation |
1282 | | of OP_OPEN_SUBEXP, the body of the SUBEXP (if any) and OP_CLOSE_SUBEXP. */ |
1283 | | static reg_errcode_t |
1284 | | lower_subexps (void *extra, bin_tree_t *node) |
1285 | 9.95M | { |
1286 | 9.95M | regex_t *preg = (regex_t *) extra; |
1287 | 9.95M | reg_errcode_t err = REG_NOERROR; |
1288 | | |
1289 | 9.95M | if (node->left && node->left->token.type == SUBEXP) |
1290 | 327 | { |
1291 | 327 | node->left = lower_subexp (&err, preg, node->left); |
1292 | 327 | if (node->left) |
1293 | 327 | node->left->parent = node; |
1294 | 327 | } |
1295 | 9.95M | if (node->right && node->right->token.type == SUBEXP) |
1296 | 1.86k | { |
1297 | 1.86k | node->right = lower_subexp (&err, preg, node->right); |
1298 | 1.86k | if (node->right) |
1299 | 1.86k | node->right->parent = node; |
1300 | 1.86k | } |
1301 | | |
1302 | 9.95M | return err; |
1303 | 9.95M | } |
1304 | | |
1305 | | static bin_tree_t * |
1306 | | lower_subexp (reg_errcode_t *err, regex_t *preg, bin_tree_t *node) |
1307 | 2.19k | { |
1308 | 2.19k | re_dfa_t *dfa = preg->buffer; |
1309 | 2.19k | bin_tree_t *body = node->left; |
1310 | 2.19k | bin_tree_t *op, *cls, *tree1, *tree; |
1311 | | |
1312 | 2.19k | if (preg->no_sub |
1313 | | /* We do not optimize empty subexpressions, because otherwise we may |
1314 | | have bad CONCAT nodes with NULL children. This is obviously not |
1315 | | very common, so we do not lose much. An example that triggers |
1316 | | this case is the sed "script" /\(\)/x. */ |
1317 | 2.19k | && node->left != NULL |
1318 | 2.19k | && (node->token.opr.idx >= BITSET_WORD_BITS |
1319 | 0 | || !(dfa->used_bkref_map |
1320 | 0 | & ((bitset_word_t) 1 << node->token.opr.idx)))) |
1321 | 0 | return node->left; |
1322 | | |
1323 | | /* Convert the SUBEXP node to the concatenation of an |
1324 | | OP_OPEN_SUBEXP, the contents, and an OP_CLOSE_SUBEXP. */ |
1325 | 2.19k | op = create_tree (dfa, NULL, NULL, OP_OPEN_SUBEXP); |
1326 | 2.19k | cls = create_tree (dfa, NULL, NULL, OP_CLOSE_SUBEXP); |
1327 | 2.19k | tree1 = body ? create_tree (dfa, body, cls, CONCAT) : cls; |
1328 | 2.19k | tree = create_tree (dfa, op, tree1, CONCAT); |
1329 | 2.19k | if (__glibc_unlikely (tree == NULL || tree1 == NULL |
1330 | 2.19k | || op == NULL || cls == NULL)) |
1331 | 0 | { |
1332 | 0 | *err = REG_ESPACE; |
1333 | 0 | return NULL; |
1334 | 0 | } |
1335 | | |
1336 | 2.19k | op->token.opr.idx = cls->token.opr.idx = node->token.opr.idx; |
1337 | 2.19k | op->token.opt_subexp = cls->token.opt_subexp = node->token.opt_subexp; |
1338 | 2.19k | return tree; |
1339 | 2.19k | } |
1340 | | |
1341 | | /* Pass 1 in building the NFA: compute FIRST and create unlinked automaton |
1342 | | nodes. Requires a postorder visit. */ |
1343 | | static reg_errcode_t |
1344 | | calc_first (void *extra, bin_tree_t *node) |
1345 | 9.95M | { |
1346 | 9.95M | re_dfa_t *dfa = (re_dfa_t *) extra; |
1347 | 9.95M | if (node->token.type == CONCAT) |
1348 | 4.92M | { |
1349 | 4.92M | node->first = node->left->first; |
1350 | 4.92M | node->node_idx = node->left->node_idx; |
1351 | 4.92M | } |
1352 | 5.02M | else |
1353 | 5.02M | { |
1354 | 5.02M | node->first = node; |
1355 | 5.02M | node->node_idx = re_dfa_add_node (dfa, node->token); |
1356 | 5.02M | if (__glibc_unlikely (node->node_idx == -1)) |
1357 | 0 | return REG_ESPACE; |
1358 | 5.02M | if (node->token.type == ANCHOR) |
1359 | 439 | dfa->nodes[node->node_idx].constraint = node->token.opr.ctx_type; |
1360 | 5.02M | } |
1361 | 9.95M | return REG_NOERROR; |
1362 | 9.95M | } |
1363 | | |
1364 | | /* Pass 2: compute NEXT on the tree. Preorder visit. */ |
1365 | | static reg_errcode_t |
1366 | | calc_next (void *extra, bin_tree_t *node) |
1367 | 9.95M | { |
1368 | 9.95M | switch (node->token.type) |
1369 | 9.95M | { |
1370 | 21.6k | case OP_DUP_ASTERISK: |
1371 | 21.6k | node->left->next = node; |
1372 | 21.6k | break; |
1373 | 4.92M | case CONCAT: |
1374 | 4.92M | node->left->next = node->right->first; |
1375 | 4.92M | node->right->next = node->next; |
1376 | 4.92M | break; |
1377 | 5.00M | default: |
1378 | 5.00M | if (node->left) |
1379 | 38.8k | node->left->next = node->next; |
1380 | 5.00M | if (node->right) |
1381 | 26.7k | node->right->next = node->next; |
1382 | 5.00M | break; |
1383 | 9.95M | } |
1384 | 9.95M | return REG_NOERROR; |
1385 | 9.95M | } |
1386 | | |
1387 | | /* Pass 3: link all DFA nodes to their NEXT node (any order will do). */ |
1388 | | static reg_errcode_t |
1389 | | link_nfa_nodes (void *extra, bin_tree_t *node) |
1390 | 9.95M | { |
1391 | 9.95M | re_dfa_t *dfa = (re_dfa_t *) extra; |
1392 | 9.95M | Idx idx = node->node_idx; |
1393 | 9.95M | reg_errcode_t err = REG_NOERROR; |
1394 | | |
1395 | 9.95M | switch (node->token.type) |
1396 | 9.95M | { |
1397 | 4.92M | case CONCAT: |
1398 | 4.92M | break; |
1399 | | |
1400 | 12.7k | case END_OF_RE: |
1401 | 12.7k | DEBUG_ASSERT (node->next == NULL); |
1402 | 0 | break; |
1403 | | |
1404 | 21.6k | case OP_DUP_ASTERISK: |
1405 | 60.6k | case OP_ALT: |
1406 | 60.6k | { |
1407 | 60.6k | Idx left, right; |
1408 | 60.6k | dfa->has_plural_match = 1; |
1409 | 60.6k | if (node->left != NULL) |
1410 | 60.5k | left = node->left->first->node_idx; |
1411 | 109 | else |
1412 | 109 | left = node->next->node_idx; |
1413 | 60.6k | if (node->right != NULL) |
1414 | 26.7k | right = node->right->first->node_idx; |
1415 | 33.8k | else |
1416 | 33.8k | right = node->next->node_idx; |
1417 | 60.6k | DEBUG_ASSERT (left > -1); |
1418 | 60.6k | DEBUG_ASSERT (right > -1); |
1419 | 0 | err = re_node_set_init_2 (dfa->edests + idx, left, right); |
1420 | 60.6k | } |
1421 | 0 | break; |
1422 | | |
1423 | 439 | case ANCHOR: |
1424 | 2.63k | case OP_OPEN_SUBEXP: |
1425 | 4.82k | case OP_CLOSE_SUBEXP: |
1426 | 4.82k | err = re_node_set_init_1 (dfa->edests + idx, node->next->node_idx); |
1427 | 4.82k | break; |
1428 | | |
1429 | 0 | case OP_BACK_REF: |
1430 | 0 | dfa->nexts[idx] = node->next->node_idx; |
1431 | 0 | if (node->token.type == OP_BACK_REF) |
1432 | 0 | err = re_node_set_init_1 (dfa->edests + idx, dfa->nexts[idx]); |
1433 | 0 | break; |
1434 | | |
1435 | 4.95M | default: |
1436 | 4.95M | DEBUG_ASSERT (!IS_EPSILON_NODE (node->token.type)); |
1437 | 0 | dfa->nexts[idx] = node->next->node_idx; |
1438 | 4.95M | break; |
1439 | 9.95M | } |
1440 | | |
1441 | 9.95M | return err; |
1442 | 9.95M | } |
1443 | | |
1444 | | /* Duplicate the epsilon closure of the node ROOT_NODE. |
1445 | | Note that duplicated nodes have constraint INIT_CONSTRAINT in addition |
1446 | | to their own constraint. */ |
1447 | | |
1448 | | static reg_errcode_t |
1449 | | duplicate_node_closure (re_dfa_t *dfa, Idx top_org_node, Idx top_clone_node, |
1450 | | Idx root_node, unsigned int init_constraint) |
1451 | 673 | { |
1452 | 673 | Idx org_node, clone_node; |
1453 | 673 | bool ok; |
1454 | 673 | unsigned int constraint = init_constraint; |
1455 | 673 | for (org_node = top_org_node, clone_node = top_clone_node;;) |
1456 | 1.69k | { |
1457 | 1.69k | Idx org_dest, clone_dest; |
1458 | 1.69k | if (dfa->nodes[org_node].type == OP_BACK_REF) |
1459 | 0 | { |
1460 | | /* If the back reference epsilon-transit, its destination must |
1461 | | also have the constraint. Then duplicate the epsilon closure |
1462 | | of the destination of the back reference, and store it in |
1463 | | edests of the back reference. */ |
1464 | 0 | org_dest = dfa->nexts[org_node]; |
1465 | 0 | re_node_set_empty (dfa->edests + clone_node); |
1466 | 0 | clone_dest = duplicate_node (dfa, org_dest, constraint); |
1467 | 0 | if (__glibc_unlikely (clone_dest == -1)) |
1468 | 0 | return REG_ESPACE; |
1469 | 0 | dfa->nexts[clone_node] = dfa->nexts[org_node]; |
1470 | 0 | ok = re_node_set_insert (dfa->edests + clone_node, clone_dest); |
1471 | 0 | if (__glibc_unlikely (! ok)) |
1472 | 0 | return REG_ESPACE; |
1473 | 0 | } |
1474 | 1.69k | else if (dfa->edests[org_node].nelem == 0) |
1475 | 657 | { |
1476 | | /* In case of the node can't epsilon-transit, don't duplicate the |
1477 | | destination and store the original destination as the |
1478 | | destination of the node. */ |
1479 | 657 | dfa->nexts[clone_node] = dfa->nexts[org_node]; |
1480 | 657 | break; |
1481 | 657 | } |
1482 | 1.03k | else if (dfa->edests[org_node].nelem == 1) |
1483 | 748 | { |
1484 | | /* In case of the node can epsilon-transit, and it has only one |
1485 | | destination. */ |
1486 | 748 | org_dest = dfa->edests[org_node].elems[0]; |
1487 | 748 | re_node_set_empty (dfa->edests + clone_node); |
1488 | | /* If the node is root_node itself, it means the epsilon closure |
1489 | | has a loop. Then tie it to the destination of the root_node. */ |
1490 | 748 | if (org_node == root_node && clone_node != org_node) |
1491 | 16 | { |
1492 | 16 | ok = re_node_set_insert (dfa->edests + clone_node, org_dest); |
1493 | 16 | if (__glibc_unlikely (! ok)) |
1494 | 0 | return REG_ESPACE; |
1495 | 16 | break; |
1496 | 16 | } |
1497 | | /* In case the node has another constraint, append it. */ |
1498 | 732 | constraint |= dfa->nodes[org_node].constraint; |
1499 | 732 | clone_dest = duplicate_node (dfa, org_dest, constraint); |
1500 | 732 | if (__glibc_unlikely (clone_dest == -1)) |
1501 | 0 | return REG_ESPACE; |
1502 | 732 | ok = re_node_set_insert (dfa->edests + clone_node, clone_dest); |
1503 | 732 | if (__glibc_unlikely (! ok)) |
1504 | 0 | return REG_ESPACE; |
1505 | 732 | } |
1506 | 288 | else /* dfa->edests[org_node].nelem == 2 */ |
1507 | 288 | { |
1508 | | /* In case of the node can epsilon-transit, and it has two |
1509 | | destinations. In the bin_tree_t and DFA, that's '|' and '*'. */ |
1510 | 288 | org_dest = dfa->edests[org_node].elems[0]; |
1511 | 288 | re_node_set_empty (dfa->edests + clone_node); |
1512 | | /* Search for a duplicated node which satisfies the constraint. */ |
1513 | 288 | clone_dest = search_duplicated_node (dfa, org_dest, constraint); |
1514 | 288 | if (clone_dest == -1) |
1515 | 234 | { |
1516 | | /* There is no such duplicated node, create a new one. */ |
1517 | 234 | reg_errcode_t err; |
1518 | 234 | clone_dest = duplicate_node (dfa, org_dest, constraint); |
1519 | 234 | if (__glibc_unlikely (clone_dest == -1)) |
1520 | 0 | return REG_ESPACE; |
1521 | 234 | ok = re_node_set_insert (dfa->edests + clone_node, clone_dest); |
1522 | 234 | if (__glibc_unlikely (! ok)) |
1523 | 0 | return REG_ESPACE; |
1524 | 234 | err = duplicate_node_closure (dfa, org_dest, clone_dest, |
1525 | 234 | root_node, constraint); |
1526 | 234 | if (__glibc_unlikely (err != REG_NOERROR)) |
1527 | 0 | return err; |
1528 | 234 | } |
1529 | 54 | else |
1530 | 54 | { |
1531 | | /* There is a duplicated node which satisfies the constraint, |
1532 | | use it to avoid infinite loop. */ |
1533 | 54 | ok = re_node_set_insert (dfa->edests + clone_node, clone_dest); |
1534 | 54 | if (__glibc_unlikely (! ok)) |
1535 | 0 | return REG_ESPACE; |
1536 | 54 | } |
1537 | | |
1538 | 288 | org_dest = dfa->edests[org_node].elems[1]; |
1539 | 288 | clone_dest = duplicate_node (dfa, org_dest, constraint); |
1540 | 288 | if (__glibc_unlikely (clone_dest == -1)) |
1541 | 0 | return REG_ESPACE; |
1542 | 288 | ok = re_node_set_insert (dfa->edests + clone_node, clone_dest); |
1543 | 288 | if (__glibc_unlikely (! ok)) |
1544 | 0 | return REG_ESPACE; |
1545 | 288 | } |
1546 | 1.02k | org_node = org_dest; |
1547 | 1.02k | clone_node = clone_dest; |
1548 | 1.02k | } |
1549 | 673 | return REG_NOERROR; |
1550 | 673 | } |
1551 | | |
1552 | | /* Search for a node which is duplicated from the node ORG_NODE, and |
1553 | | satisfies the constraint CONSTRAINT. */ |
1554 | | |
1555 | | static Idx |
1556 | | search_duplicated_node (const re_dfa_t *dfa, Idx org_node, |
1557 | | unsigned int constraint) |
1558 | 288 | { |
1559 | 288 | Idx idx; |
1560 | 4.62k | for (idx = dfa->nodes_len - 1; dfa->nodes[idx].duplicated && idx > 0; --idx) |
1561 | 4.38k | { |
1562 | 4.38k | if (org_node == dfa->org_indices[idx] |
1563 | 4.38k | && constraint == dfa->nodes[idx].constraint) |
1564 | 54 | return idx; /* Found. */ |
1565 | 4.38k | } |
1566 | 234 | return -1; /* Not found. */ |
1567 | 288 | } |
1568 | | |
1569 | | /* Duplicate the node whose index is ORG_IDX and set the constraint CONSTRAINT. |
1570 | | Return the index of the new node, or -1 if insufficient storage is |
1571 | | available. */ |
1572 | | |
1573 | | static Idx |
1574 | | duplicate_node (re_dfa_t *dfa, Idx org_idx, unsigned int constraint) |
1575 | 1.25k | { |
1576 | 1.25k | Idx dup_idx = re_dfa_add_node (dfa, dfa->nodes[org_idx]); |
1577 | 1.25k | if (__glibc_likely (dup_idx != -1)) |
1578 | 1.25k | { |
1579 | 1.25k | dfa->nodes[dup_idx].constraint = constraint; |
1580 | 1.25k | dfa->nodes[dup_idx].constraint |= dfa->nodes[org_idx].constraint; |
1581 | 1.25k | dfa->nodes[dup_idx].duplicated = 1; |
1582 | | |
1583 | | /* Store the index of the original node. */ |
1584 | 1.25k | dfa->org_indices[dup_idx] = org_idx; |
1585 | 1.25k | } |
1586 | 1.25k | return dup_idx; |
1587 | 1.25k | } |
1588 | | |
1589 | | static reg_errcode_t |
1590 | | calc_inveclosure (re_dfa_t *dfa) |
1591 | 246 | { |
1592 | 246 | Idx src, idx; |
1593 | 246 | bool ok; |
1594 | 5.00M | for (idx = 0; idx < dfa->nodes_len; ++idx) |
1595 | 5.00M | re_node_set_init_empty (dfa->inveclosures + idx); |
1596 | | |
1597 | 5.00M | for (src = 0; src < dfa->nodes_len; ++src) |
1598 | 5.00M | { |
1599 | 5.00M | Idx *elems = dfa->eclosures[src].elems; |
1600 | 22.2M | for (idx = 0; idx < dfa->eclosures[src].nelem; ++idx) |
1601 | 17.2M | { |
1602 | 17.2M | ok = re_node_set_insert_last (dfa->inveclosures + elems[idx], src); |
1603 | 17.2M | if (__glibc_unlikely (! ok)) |
1604 | 0 | return REG_ESPACE; |
1605 | 17.2M | } |
1606 | 5.00M | } |
1607 | | |
1608 | 246 | return REG_NOERROR; |
1609 | 246 | } |
1610 | | |
1611 | | /* Calculate "eclosure" for all the node in DFA. */ |
1612 | | |
1613 | | static reg_errcode_t |
1614 | | calc_eclosure (re_dfa_t *dfa) |
1615 | 12.7k | { |
1616 | 12.7k | Idx node_idx; |
1617 | 12.7k | bool incomplete; |
1618 | 12.7k | DEBUG_ASSERT (dfa->nodes_len > 0); |
1619 | 0 | incomplete = false; |
1620 | | /* For each nodes, calculate epsilon closure. */ |
1621 | 5.03M | for (node_idx = 0; ; ++node_idx) |
1622 | 5.04M | { |
1623 | 5.04M | reg_errcode_t err; |
1624 | 5.04M | re_node_set eclosure_elem; |
1625 | 5.04M | if (node_idx == dfa->nodes_len) |
1626 | 12.7k | { |
1627 | 12.7k | if (!incomplete) |
1628 | 12.7k | break; |
1629 | 0 | incomplete = false; |
1630 | 0 | node_idx = 0; |
1631 | 0 | } |
1632 | | |
1633 | 5.03M | DEBUG_ASSERT (dfa->eclosures[node_idx].nelem != -1); |
1634 | | |
1635 | | /* If we have already calculated, skip it. */ |
1636 | 5.03M | if (dfa->eclosures[node_idx].nelem != 0) |
1637 | 84.0k | continue; |
1638 | | /* Calculate epsilon closure of 'node_idx'. */ |
1639 | 4.94M | err = calc_eclosure_iter (&eclosure_elem, dfa, node_idx, true); |
1640 | 4.94M | if (__glibc_unlikely (err != REG_NOERROR)) |
1641 | 0 | return err; |
1642 | | |
1643 | 4.94M | if (dfa->eclosures[node_idx].nelem == 0) |
1644 | 0 | { |
1645 | 0 | incomplete = true; |
1646 | 0 | re_node_set_free (&eclosure_elem); |
1647 | 0 | } |
1648 | 4.94M | } |
1649 | 12.7k | return REG_NOERROR; |
1650 | 12.7k | } |
1651 | | |
1652 | | /* Calculate epsilon closure of NODE. */ |
1653 | | |
1654 | | static reg_errcode_t |
1655 | | calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa, Idx node, bool root) |
1656 | 5.03M | { |
1657 | 5.03M | reg_errcode_t err; |
1658 | 5.03M | Idx i; |
1659 | 5.03M | re_node_set eclosure; |
1660 | 5.03M | bool incomplete = false; |
1661 | 5.03M | err = re_node_set_alloc (&eclosure, dfa->edests[node].nelem + 1); |
1662 | 5.03M | if (__glibc_unlikely (err != REG_NOERROR)) |
1663 | 0 | return err; |
1664 | | |
1665 | | /* An epsilon closure includes itself. */ |
1666 | 5.03M | eclosure.elems[eclosure.nelem++] = node; |
1667 | | |
1668 | | /* This indicates that we are calculating this node now. |
1669 | | We reference this value to avoid infinite loop. */ |
1670 | 5.03M | dfa->eclosures[node].nelem = -1; |
1671 | | |
1672 | | /* If the current node has constraints, duplicate all nodes |
1673 | | since they must inherit the constraints. */ |
1674 | 5.03M | if (dfa->nodes[node].constraint |
1675 | 5.03M | && dfa->edests[node].nelem |
1676 | 5.03M | && !dfa->nodes[dfa->edests[node].elems[0]].duplicated) |
1677 | 439 | { |
1678 | 439 | err = duplicate_node_closure (dfa, node, node, node, |
1679 | 439 | dfa->nodes[node].constraint); |
1680 | 439 | if (__glibc_unlikely (err != REG_NOERROR)) |
1681 | 0 | return err; |
1682 | 439 | } |
1683 | | |
1684 | | /* Expand each epsilon destination nodes. */ |
1685 | 5.03M | if (IS_EPSILON_NODE(dfa->nodes[node].type)) |
1686 | 209k | for (i = 0; i < dfa->edests[node].nelem; ++i) |
1687 | 137k | { |
1688 | 137k | re_node_set eclosure_elem; |
1689 | 137k | Idx edest = dfa->edests[node].elems[i]; |
1690 | | /* If calculating the epsilon closure of 'edest' is in progress, |
1691 | | return intermediate result. */ |
1692 | 137k | if (dfa->eclosures[edest].nelem == -1) |
1693 | 1.13k | { |
1694 | 1.13k | incomplete = true; |
1695 | 1.13k | continue; |
1696 | 1.13k | } |
1697 | | /* If we haven't calculated the epsilon closure of 'edest' yet, |
1698 | | calculate now. Otherwise use calculated epsilon closure. */ |
1699 | 136k | if (dfa->eclosures[edest].nelem == 0) |
1700 | 90.0k | { |
1701 | 90.0k | err = calc_eclosure_iter (&eclosure_elem, dfa, edest, false); |
1702 | 90.0k | if (__glibc_unlikely (err != REG_NOERROR)) |
1703 | 0 | return err; |
1704 | 90.0k | } |
1705 | 46.0k | else |
1706 | 46.0k | eclosure_elem = dfa->eclosures[edest]; |
1707 | | /* Merge the epsilon closure of 'edest'. */ |
1708 | 136k | err = re_node_set_merge (&eclosure, &eclosure_elem); |
1709 | 136k | if (__glibc_unlikely (err != REG_NOERROR)) |
1710 | 0 | return err; |
1711 | | /* If the epsilon closure of 'edest' is incomplete, |
1712 | | the epsilon closure of this node is also incomplete. */ |
1713 | 136k | if (dfa->eclosures[edest].nelem == 0) |
1714 | 6.04k | { |
1715 | 6.04k | incomplete = true; |
1716 | 6.04k | re_node_set_free (&eclosure_elem); |
1717 | 6.04k | } |
1718 | 136k | } |
1719 | | |
1720 | 5.03M | if (incomplete && !root) |
1721 | 6.04k | dfa->eclosures[node].nelem = 0; |
1722 | 5.03M | else |
1723 | 5.03M | dfa->eclosures[node] = eclosure; |
1724 | 5.03M | *new_set = eclosure; |
1725 | 5.03M | return REG_NOERROR; |
1726 | 5.03M | } |
1727 | | |
1728 | | /* Functions for token which are used in the parser. */ |
1729 | | |
1730 | | /* Fetch a token from INPUT. |
1731 | | We must not use this function inside bracket expressions. */ |
1732 | | |
1733 | | static void |
1734 | | fetch_token (re_token_t *result, re_string_t *input, reg_syntax_t syntax) |
1735 | 8.02M | { |
1736 | 8.02M | re_string_skip_bytes (input, peek_token (result, input, syntax)); |
1737 | 8.02M | } |
1738 | | |
1739 | | /* Peek a token from INPUT, and return the length of the token. |
1740 | | We must not use this function inside bracket expressions. */ |
1741 | | |
1742 | | static int |
1743 | | peek_token (re_token_t *token, re_string_t *input, reg_syntax_t syntax) |
1744 | 3.87G | { |
1745 | 3.87G | unsigned char c; |
1746 | | |
1747 | 3.87G | if (re_string_eoi (input)) |
1748 | 12.7k | { |
1749 | 12.7k | token->type = END_OF_RE; |
1750 | 12.7k | return 0; |
1751 | 12.7k | } |
1752 | | |
1753 | 3.87G | c = re_string_peek_byte (input, 0); |
1754 | 3.87G | token->opr.c = c; |
1755 | | |
1756 | 3.87G | token->word_char = 0; |
1757 | 3.87G | token->mb_partial = 0; |
1758 | 3.87G | if (input->mb_cur_max > 1 |
1759 | 3.87G | && !re_string_first_byte (input, re_string_cur_idx (input))) |
1760 | 0 | { |
1761 | 0 | token->type = CHARACTER; |
1762 | 0 | token->mb_partial = 1; |
1763 | 0 | return 1; |
1764 | 0 | } |
1765 | 3.87G | if (c == '\\') |
1766 | 1.65k | { |
1767 | 1.65k | unsigned char c2; |
1768 | 1.65k | if (re_string_cur_idx (input) + 1 >= re_string_length (input)) |
1769 | 0 | { |
1770 | 0 | token->type = BACK_SLASH; |
1771 | 0 | return 1; |
1772 | 0 | } |
1773 | | |
1774 | 1.65k | c2 = re_string_peek_byte_case (input, 1); |
1775 | 1.65k | token->opr.c = c2; |
1776 | 1.65k | token->type = CHARACTER; |
1777 | 1.65k | if (input->mb_cur_max > 1) |
1778 | 0 | { |
1779 | 0 | wint_t wc = re_string_wchar_at (input, |
1780 | 0 | re_string_cur_idx (input) + 1); |
1781 | 0 | token->word_char = IS_WIDE_WORD_CHAR (wc) != 0; |
1782 | 0 | } |
1783 | 1.65k | else |
1784 | 1.65k | token->word_char = IS_WORD_CHAR (c2) != 0; |
1785 | | |
1786 | 1.65k | switch (c2) |
1787 | 1.65k | { |
1788 | 0 | case '|': |
1789 | 0 | if (!(syntax & RE_LIMITED_OPS) && !(syntax & RE_NO_BK_VBAR)) |
1790 | 0 | token->type = OP_ALT; |
1791 | 0 | break; |
1792 | 98 | case '1': case '2': case '3': case '4': case '5': |
1793 | 98 | case '6': case '7': case '8': case '9': |
1794 | 98 | if (!(syntax & RE_NO_BK_REFS)) |
1795 | 0 | { |
1796 | 0 | token->type = OP_BACK_REF; |
1797 | 0 | token->opr.idx = c2 - '1'; |
1798 | 0 | } |
1799 | 98 | break; |
1800 | 0 | case '<': |
1801 | 0 | if (!(syntax & RE_NO_GNU_OPS)) |
1802 | 0 | { |
1803 | 0 | token->type = ANCHOR; |
1804 | 0 | token->opr.ctx_type = WORD_FIRST; |
1805 | 0 | } |
1806 | 0 | break; |
1807 | 0 | case '>': |
1808 | 0 | if (!(syntax & RE_NO_GNU_OPS)) |
1809 | 0 | { |
1810 | 0 | token->type = ANCHOR; |
1811 | 0 | token->opr.ctx_type = WORD_LAST; |
1812 | 0 | } |
1813 | 0 | break; |
1814 | 0 | case 'b': |
1815 | 0 | if (!(syntax & RE_NO_GNU_OPS)) |
1816 | 0 | { |
1817 | 0 | token->type = ANCHOR; |
1818 | 0 | token->opr.ctx_type = WORD_DELIM; |
1819 | 0 | } |
1820 | 0 | break; |
1821 | 0 | case 'B': |
1822 | 0 | if (!(syntax & RE_NO_GNU_OPS)) |
1823 | 0 | { |
1824 | 0 | token->type = ANCHOR; |
1825 | 0 | token->opr.ctx_type = NOT_WORD_DELIM; |
1826 | 0 | } |
1827 | 0 | break; |
1828 | 0 | case 'w': |
1829 | 0 | if (!(syntax & RE_NO_GNU_OPS)) |
1830 | 0 | token->type = OP_WORD; |
1831 | 0 | break; |
1832 | 0 | case 'W': |
1833 | 0 | if (!(syntax & RE_NO_GNU_OPS)) |
1834 | 0 | token->type = OP_NOTWORD; |
1835 | 0 | break; |
1836 | 0 | case 's': |
1837 | 0 | if (!(syntax & RE_NO_GNU_OPS)) |
1838 | 0 | token->type = OP_SPACE; |
1839 | 0 | break; |
1840 | 0 | case 'S': |
1841 | 0 | if (!(syntax & RE_NO_GNU_OPS)) |
1842 | 0 | token->type = OP_NOTSPACE; |
1843 | 0 | break; |
1844 | 0 | case '`': |
1845 | 0 | if (!(syntax & RE_NO_GNU_OPS)) |
1846 | 0 | { |
1847 | 0 | token->type = ANCHOR; |
1848 | 0 | token->opr.ctx_type = BUF_FIRST; |
1849 | 0 | } |
1850 | 0 | break; |
1851 | 0 | case '\'': |
1852 | 0 | if (!(syntax & RE_NO_GNU_OPS)) |
1853 | 0 | { |
1854 | 0 | token->type = ANCHOR; |
1855 | 0 | token->opr.ctx_type = BUF_LAST; |
1856 | 0 | } |
1857 | 0 | break; |
1858 | 0 | case '(': |
1859 | 0 | if (!(syntax & RE_NO_BK_PARENS)) |
1860 | 0 | token->type = OP_OPEN_SUBEXP; |
1861 | 0 | break; |
1862 | 0 | case ')': |
1863 | 0 | if (!(syntax & RE_NO_BK_PARENS)) |
1864 | 0 | token->type = OP_CLOSE_SUBEXP; |
1865 | 0 | break; |
1866 | 0 | case '+': |
1867 | 0 | if (!(syntax & RE_LIMITED_OPS) && (syntax & RE_BK_PLUS_QM)) |
1868 | 0 | token->type = OP_DUP_PLUS; |
1869 | 0 | break; |
1870 | 0 | case '?': |
1871 | 0 | if (!(syntax & RE_LIMITED_OPS) && (syntax & RE_BK_PLUS_QM)) |
1872 | 0 | token->type = OP_DUP_QUESTION; |
1873 | 0 | break; |
1874 | 0 | case '{': |
1875 | 0 | if ((syntax & RE_INTERVALS) && (!(syntax & RE_NO_BK_BRACES))) |
1876 | 0 | token->type = OP_OPEN_DUP_NUM; |
1877 | 0 | break; |
1878 | 132 | case '}': |
1879 | 132 | if ((syntax & RE_INTERVALS) && (!(syntax & RE_NO_BK_BRACES))) |
1880 | 0 | token->type = OP_CLOSE_DUP_NUM; |
1881 | 132 | break; |
1882 | 1.42k | default: |
1883 | 1.42k | break; |
1884 | 1.65k | } |
1885 | 1.65k | return 2; |
1886 | 1.65k | } |
1887 | | |
1888 | 3.87G | token->type = CHARACTER; |
1889 | 3.87G | if (input->mb_cur_max > 1) |
1890 | 0 | { |
1891 | 0 | wint_t wc = re_string_wchar_at (input, re_string_cur_idx (input)); |
1892 | 0 | token->word_char = IS_WIDE_WORD_CHAR (wc) != 0; |
1893 | 0 | } |
1894 | 3.87G | else |
1895 | 3.87G | token->word_char = IS_WORD_CHAR (token->opr.c); |
1896 | | |
1897 | 3.87G | switch (c) |
1898 | 3.87G | { |
1899 | 709k | case '\n': |
1900 | 709k | if (syntax & RE_NEWLINE_ALT) |
1901 | 0 | token->type = OP_ALT; |
1902 | 709k | break; |
1903 | 28.4k | case '|': |
1904 | 28.4k | if (!(syntax & RE_LIMITED_OPS) && (syntax & RE_NO_BK_VBAR)) |
1905 | 28.4k | token->type = OP_ALT; |
1906 | 28.4k | break; |
1907 | 267k | case '*': |
1908 | 267k | token->type = OP_DUP_ASTERISK; |
1909 | 267k | break; |
1910 | 2.73k | case '+': |
1911 | 2.73k | if (!(syntax & RE_LIMITED_OPS) && !(syntax & RE_BK_PLUS_QM)) |
1912 | 2.73k | token->type = OP_DUP_PLUS; |
1913 | 2.73k | break; |
1914 | 12.2k | case '?': |
1915 | 12.2k | if (!(syntax & RE_LIMITED_OPS) && !(syntax & RE_BK_PLUS_QM)) |
1916 | 12.2k | token->type = OP_DUP_QUESTION; |
1917 | 12.2k | break; |
1918 | 0 | case '{': |
1919 | 0 | if ((syntax & RE_INTERVALS) && (syntax & RE_NO_BK_BRACES)) |
1920 | 0 | token->type = OP_OPEN_DUP_NUM; |
1921 | 0 | break; |
1922 | 552 | case '}': |
1923 | 552 | if ((syntax & RE_INTERVALS) && (syntax & RE_NO_BK_BRACES)) |
1924 | 552 | token->type = OP_CLOSE_DUP_NUM; |
1925 | 552 | break; |
1926 | 830k | case '(': |
1927 | 830k | if (syntax & RE_NO_BK_PARENS) |
1928 | 830k | token->type = OP_OPEN_SUBEXP; |
1929 | 830k | break; |
1930 | 815k | case ')': |
1931 | 815k | if (syntax & RE_NO_BK_PARENS) |
1932 | 815k | token->type = OP_CLOSE_SUBEXP; |
1933 | 815k | break; |
1934 | 17.0k | case '[': |
1935 | 17.0k | token->type = OP_OPEN_BRACKET; |
1936 | 17.0k | break; |
1937 | 28.8k | case '.': |
1938 | 28.8k | token->type = OP_PERIOD; |
1939 | 28.8k | break; |
1940 | 165 | case '^': |
1941 | 165 | if (!(syntax & (RE_CONTEXT_INDEP_ANCHORS | RE_CARET_ANCHORS_HERE)) |
1942 | 165 | && re_string_cur_idx (input) != 0) |
1943 | 150 | { |
1944 | 150 | char prev = re_string_peek_byte (input, -1); |
1945 | 150 | if (!(syntax & RE_NEWLINE_ALT) || prev != '\n') |
1946 | 150 | break; |
1947 | 150 | } |
1948 | 15 | token->type = ANCHOR; |
1949 | 15 | token->opr.ctx_type = LINE_FIRST; |
1950 | 15 | break; |
1951 | 3.86G | case '$': |
1952 | 3.86G | if (!(syntax & RE_CONTEXT_INDEP_ANCHORS) |
1953 | 3.86G | && re_string_cur_idx (input) + 1 != re_string_length (input)) |
1954 | 3.86G | { |
1955 | 3.86G | re_token_t next; |
1956 | 3.86G | re_string_skip_bytes (input, 1); |
1957 | 3.86G | peek_token (&next, input, syntax); |
1958 | 3.86G | re_string_skip_bytes (input, -1); |
1959 | 3.86G | if (next.type != OP_ALT && next.type != OP_CLOSE_SUBEXP) |
1960 | 3.86G | break; |
1961 | 3.86G | } |
1962 | 415 | token->type = ANCHOR; |
1963 | 415 | token->opr.ctx_type = LINE_LAST; |
1964 | 415 | break; |
1965 | 5.29M | default: |
1966 | 5.29M | break; |
1967 | 3.87G | } |
1968 | 3.87G | return 1; |
1969 | 3.87G | } |
1970 | | |
1971 | | /* Peek a token from INPUT, and return the length of the token. |
1972 | | We must not use this function out of bracket expressions. */ |
1973 | | |
1974 | | static int |
1975 | | peek_token_bracket (re_token_t *token, re_string_t *input, reg_syntax_t syntax) |
1976 | 62.2M | { |
1977 | 62.2M | unsigned char c; |
1978 | 62.2M | if (re_string_eoi (input)) |
1979 | 0 | { |
1980 | 0 | token->type = END_OF_RE; |
1981 | 0 | return 0; |
1982 | 0 | } |
1983 | 62.2M | c = re_string_peek_byte (input, 0); |
1984 | 62.2M | token->opr.c = c; |
1985 | | |
1986 | 62.2M | if (input->mb_cur_max > 1 |
1987 | 62.2M | && !re_string_first_byte (input, re_string_cur_idx (input))) |
1988 | 0 | { |
1989 | 0 | token->type = CHARACTER; |
1990 | 0 | return 1; |
1991 | 0 | } |
1992 | | |
1993 | 62.2M | if (c == '\\' && (syntax & RE_BACKSLASH_ESCAPE_IN_LISTS) |
1994 | 62.2M | && re_string_cur_idx (input) + 1 < re_string_length (input)) |
1995 | 0 | { |
1996 | | /* In this case, '\' escape a character. */ |
1997 | 0 | unsigned char c2; |
1998 | 0 | re_string_skip_bytes (input, 1); |
1999 | 0 | c2 = re_string_peek_byte (input, 0); |
2000 | 0 | token->opr.c = c2; |
2001 | 0 | token->type = CHARACTER; |
2002 | 0 | return 1; |
2003 | 0 | } |
2004 | 62.2M | if (c == '[') /* '[' is a special char in a bracket exps. */ |
2005 | 34.2k | { |
2006 | 34.2k | unsigned char c2; |
2007 | 34.2k | int token_len; |
2008 | 34.2k | if (re_string_cur_idx (input) + 1 < re_string_length (input)) |
2009 | 34.2k | c2 = re_string_peek_byte (input, 1); |
2010 | 0 | else |
2011 | 0 | c2 = 0; |
2012 | 34.2k | token->opr.c = c2; |
2013 | 34.2k | token_len = 2; |
2014 | 34.2k | switch (c2) |
2015 | 34.2k | { |
2016 | 83 | case '.': |
2017 | 83 | token->type = OP_OPEN_COLL_ELEM; |
2018 | 83 | break; |
2019 | | |
2020 | 0 | case '=': |
2021 | 0 | token->type = OP_OPEN_EQUIV_CLASS; |
2022 | 0 | break; |
2023 | | |
2024 | 0 | case ':': |
2025 | 0 | if (syntax & RE_CHAR_CLASSES) |
2026 | 0 | { |
2027 | 0 | token->type = OP_OPEN_CHAR_CLASS; |
2028 | 0 | break; |
2029 | 0 | } |
2030 | 0 | FALLTHROUGH; |
2031 | 34.1k | default: |
2032 | 34.1k | token->type = CHARACTER; |
2033 | 34.1k | token->opr.c = c; |
2034 | 34.1k | token_len = 1; |
2035 | 34.1k | break; |
2036 | 34.2k | } |
2037 | 34.2k | return token_len; |
2038 | 34.2k | } |
2039 | 62.2M | switch (c) |
2040 | 62.2M | { |
2041 | 20.6k | case ']': |
2042 | 20.6k | token->type = OP_CLOSE_BRACKET; |
2043 | 20.6k | break; |
2044 | 12.2k | case '^': |
2045 | 12.2k | token->type = OP_NON_MATCH_LIST; |
2046 | 12.2k | break; |
2047 | 16.4k | case '-': |
2048 | | /* In V7 Unix grep and Unix awk and mawk, [...---...] |
2049 | | (3 adjacent minus signs) stands for a single minus sign. |
2050 | | Support that without breaking anything else. */ |
2051 | 16.4k | if (! (re_string_cur_idx (input) + 2 < re_string_length (input) |
2052 | 16.4k | && re_string_peek_byte (input, 1) == '-' |
2053 | 16.4k | && re_string_peek_byte (input, 2) == '-')) |
2054 | 16.4k | { |
2055 | 16.4k | token->type = OP_CHARSET_RANGE; |
2056 | 16.4k | break; |
2057 | 16.4k | } |
2058 | 0 | re_string_skip_bytes (input, 2); |
2059 | 0 | FALLTHROUGH; |
2060 | 62.1M | default: |
2061 | 62.1M | token->type = CHARACTER; |
2062 | 62.2M | } |
2063 | 62.2M | return 1; |
2064 | 62.2M | } |
2065 | | |
2066 | | /* Functions for parser. */ |
2067 | | |
2068 | | /* Entry point of the parser. |
2069 | | Parse the regular expression REGEXP and return the structure tree. |
2070 | | If an error occurs, ERR is set by error code, and return NULL. |
2071 | | This function build the following tree, from regular expression <reg_exp>: |
2072 | | CAT |
2073 | | / \ |
2074 | | / \ |
2075 | | <reg_exp> EOR |
2076 | | |
2077 | | CAT means concatenation. |
2078 | | EOR means end of regular expression. */ |
2079 | | |
2080 | | static bin_tree_t * |
2081 | | parse (re_string_t *regexp, regex_t *preg, reg_syntax_t syntax, |
2082 | | reg_errcode_t *err) |
2083 | 12.7k | { |
2084 | 12.7k | re_dfa_t *dfa = preg->buffer; |
2085 | 12.7k | bin_tree_t *tree, *eor, *root; |
2086 | 12.7k | re_token_t current_token; |
2087 | 12.7k | dfa->syntax = syntax; |
2088 | 12.7k | fetch_token (¤t_token, regexp, syntax | RE_CARET_ANCHORS_HERE); |
2089 | 12.7k | tree = parse_reg_exp (regexp, preg, ¤t_token, syntax, 0, err); |
2090 | 12.7k | if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL)) |
2091 | 54 | return NULL; |
2092 | 12.7k | eor = create_tree (dfa, NULL, NULL, END_OF_RE); |
2093 | 12.7k | if (tree != NULL) |
2094 | 12.7k | root = create_tree (dfa, tree, eor, CONCAT); |
2095 | 0 | else |
2096 | 0 | root = eor; |
2097 | 12.7k | if (__glibc_unlikely (eor == NULL || root == NULL)) |
2098 | 0 | { |
2099 | 0 | *err = REG_ESPACE; |
2100 | 0 | return NULL; |
2101 | 0 | } |
2102 | 12.7k | return root; |
2103 | 12.7k | } |
2104 | | |
2105 | | /* This function build the following tree, from regular expression |
2106 | | <branch1>|<branch2>: |
2107 | | ALT |
2108 | | / \ |
2109 | | / \ |
2110 | | <branch1> <branch2> |
2111 | | |
2112 | | ALT means alternative, which represents the operator '|'. */ |
2113 | | |
2114 | | static bin_tree_t * |
2115 | | parse_reg_exp (re_string_t *regexp, regex_t *preg, re_token_t *token, |
2116 | | reg_syntax_t syntax, Idx nest, reg_errcode_t *err) |
2117 | 566k | { |
2118 | 566k | re_dfa_t *dfa = preg->buffer; |
2119 | 566k | bin_tree_t *tree, *branch = NULL; |
2120 | 566k | bitset_word_t initial_bkref_map = dfa->completed_bkref_map; |
2121 | 566k | tree = parse_branch (regexp, preg, token, syntax, nest, err); |
2122 | 566k | if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL)) |
2123 | 15.2k | return NULL; |
2124 | | |
2125 | 579k | while (token->type == OP_ALT) |
2126 | 28.3k | { |
2127 | 28.3k | fetch_token (token, regexp, syntax | RE_CARET_ANCHORS_HERE); |
2128 | 28.3k | if (token->type != OP_ALT && token->type != END_OF_RE |
2129 | 28.3k | && (nest == 0 || token->type != OP_CLOSE_SUBEXP)) |
2130 | 28.2k | { |
2131 | 28.2k | bitset_word_t accumulated_bkref_map = dfa->completed_bkref_map; |
2132 | 28.2k | dfa->completed_bkref_map = initial_bkref_map; |
2133 | 28.2k | branch = parse_branch (regexp, preg, token, syntax, nest, err); |
2134 | 28.2k | if (__glibc_unlikely (*err != REG_NOERROR && branch == NULL)) |
2135 | 84 | { |
2136 | 84 | if (tree != NULL) |
2137 | 84 | postorder (tree, free_tree, NULL); |
2138 | 84 | return NULL; |
2139 | 84 | } |
2140 | 28.1k | dfa->completed_bkref_map |= accumulated_bkref_map; |
2141 | 28.1k | } |
2142 | 28 | else |
2143 | 28 | branch = NULL; |
2144 | 28.2k | tree = create_tree (dfa, tree, branch, OP_ALT); |
2145 | 28.2k | if (__glibc_unlikely (tree == NULL)) |
2146 | 0 | { |
2147 | 0 | *err = REG_ESPACE; |
2148 | 0 | return NULL; |
2149 | 0 | } |
2150 | 28.2k | } |
2151 | 551k | return tree; |
2152 | 551k | } |
2153 | | |
2154 | | /* This function build the following tree, from regular expression |
2155 | | <exp1><exp2>: |
2156 | | CAT |
2157 | | / \ |
2158 | | / \ |
2159 | | <exp1> <exp2> |
2160 | | |
2161 | | CAT means concatenation. */ |
2162 | | |
2163 | | static bin_tree_t * |
2164 | | parse_branch (re_string_t *regexp, regex_t *preg, re_token_t *token, |
2165 | | reg_syntax_t syntax, Idx nest, reg_errcode_t *err) |
2166 | 594k | { |
2167 | 594k | bin_tree_t *tree, *expr; |
2168 | 594k | re_dfa_t *dfa = preg->buffer; |
2169 | 594k | tree = parse_expression (regexp, preg, token, syntax, nest, err); |
2170 | 594k | if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL)) |
2171 | 252 | return NULL; |
2172 | | |
2173 | 7.12M | while (token->type != OP_ALT && token->type != END_OF_RE |
2174 | 7.12M | && (nest == 0 || token->type != OP_CLOSE_SUBEXP)) |
2175 | 6.54M | { |
2176 | 6.54M | expr = parse_expression (regexp, preg, token, syntax, nest, err); |
2177 | 6.54M | if (__glibc_unlikely (*err != REG_NOERROR && expr == NULL)) |
2178 | 15.0k | { |
2179 | 15.0k | if (tree != NULL) |
2180 | 15.0k | postorder (tree, free_tree, NULL); |
2181 | 15.0k | return NULL; |
2182 | 15.0k | } |
2183 | 6.52M | if (tree != NULL && expr != NULL) |
2184 | 6.52M | { |
2185 | 6.52M | bin_tree_t *newtree = create_tree (dfa, tree, expr, CONCAT); |
2186 | 6.52M | if (newtree == NULL) |
2187 | 0 | { |
2188 | 0 | postorder (expr, free_tree, NULL); |
2189 | 0 | postorder (tree, free_tree, NULL); |
2190 | 0 | *err = REG_ESPACE; |
2191 | 0 | return NULL; |
2192 | 0 | } |
2193 | 6.52M | tree = newtree; |
2194 | 6.52M | } |
2195 | 0 | else if (tree == NULL) |
2196 | 0 | tree = expr; |
2197 | | /* Otherwise expr == NULL, we don't need to create new tree. */ |
2198 | 6.52M | } |
2199 | 579k | return tree; |
2200 | 594k | } |
2201 | | |
2202 | | /* This function build the following tree, from regular expression a*: |
2203 | | * |
2204 | | | |
2205 | | a |
2206 | | */ |
2207 | | |
2208 | | static bin_tree_t * |
2209 | | parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token, |
2210 | | reg_syntax_t syntax, Idx nest, reg_errcode_t *err) |
2211 | 7.13M | { |
2212 | 7.13M | re_dfa_t *dfa = preg->buffer; |
2213 | 7.13M | bin_tree_t *tree; |
2214 | 7.13M | switch (token->type) |
2215 | 7.13M | { |
2216 | 6.26M | case CHARACTER: |
2217 | 6.26M | tree = create_token_tree (dfa, NULL, NULL, token); |
2218 | 6.26M | if (__glibc_unlikely (tree == NULL)) |
2219 | 0 | { |
2220 | 0 | *err = REG_ESPACE; |
2221 | 0 | return NULL; |
2222 | 0 | } |
2223 | 6.26M | if (dfa->mb_cur_max > 1) |
2224 | 0 | { |
2225 | 0 | while (!re_string_eoi (regexp) |
2226 | 0 | && !re_string_first_byte (regexp, re_string_cur_idx (regexp))) |
2227 | 0 | { |
2228 | 0 | bin_tree_t *mbc_remain; |
2229 | 0 | fetch_token (token, regexp, syntax); |
2230 | 0 | mbc_remain = create_token_tree (dfa, NULL, NULL, token); |
2231 | 0 | tree = create_tree (dfa, tree, mbc_remain, CONCAT); |
2232 | 0 | if (__glibc_unlikely (mbc_remain == NULL || tree == NULL)) |
2233 | 0 | { |
2234 | 0 | *err = REG_ESPACE; |
2235 | 0 | return NULL; |
2236 | 0 | } |
2237 | 0 | } |
2238 | 0 | } |
2239 | 6.26M | break; |
2240 | | |
2241 | 6.26M | case OP_OPEN_SUBEXP: |
2242 | 830k | tree = parse_sub_exp (regexp, preg, token, syntax, nest + 1, err); |
2243 | 830k | if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL)) |
2244 | 15.2k | return NULL; |
2245 | 815k | break; |
2246 | | |
2247 | 815k | case OP_OPEN_BRACKET: |
2248 | 17.0k | tree = parse_bracket_exp (regexp, dfa, token, syntax, err); |
2249 | 17.0k | if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL)) |
2250 | 10 | return NULL; |
2251 | 17.0k | break; |
2252 | | |
2253 | 17.0k | case OP_BACK_REF: |
2254 | 0 | if (!__glibc_likely (dfa->completed_bkref_map & (1 << token->opr.idx))) |
2255 | 0 | { |
2256 | 0 | *err = REG_ESUBREG; |
2257 | 0 | return NULL; |
2258 | 0 | } |
2259 | 0 | dfa->used_bkref_map |= 1 << token->opr.idx; |
2260 | 0 | tree = create_token_tree (dfa, NULL, NULL, token); |
2261 | 0 | if (__glibc_unlikely (tree == NULL)) |
2262 | 0 | { |
2263 | 0 | *err = REG_ESPACE; |
2264 | 0 | return NULL; |
2265 | 0 | } |
2266 | 0 | ++dfa->nbackref; |
2267 | 0 | dfa->has_mb_node = 1; |
2268 | 0 | break; |
2269 | | |
2270 | 0 | case OP_OPEN_DUP_NUM: |
2271 | 0 | if (syntax & RE_CONTEXT_INVALID_DUP) |
2272 | 0 | { |
2273 | 0 | *err = REG_BADRPT; |
2274 | 0 | return NULL; |
2275 | 0 | } |
2276 | 0 | FALLTHROUGH; |
2277 | 30 | case OP_DUP_ASTERISK: |
2278 | 30 | case OP_DUP_PLUS: |
2279 | 30 | case OP_DUP_QUESTION: |
2280 | 30 | if (syntax & RE_CONTEXT_INVALID_OPS) |
2281 | 30 | { |
2282 | 30 | *err = REG_BADRPT; |
2283 | 30 | return NULL; |
2284 | 30 | } |
2285 | 0 | else if (syntax & RE_CONTEXT_INDEP_OPS) |
2286 | 0 | { |
2287 | 0 | fetch_token (token, regexp, syntax); |
2288 | 0 | return parse_expression (regexp, preg, token, syntax, nest, err); |
2289 | 0 | } |
2290 | 30 | FALLTHROUGH; |
2291 | 0 | case OP_CLOSE_SUBEXP: |
2292 | 0 | if ((token->type == OP_CLOSE_SUBEXP) |
2293 | 0 | && !(syntax & RE_UNMATCHED_RIGHT_PAREN_ORD)) |
2294 | 0 | { |
2295 | 0 | *err = REG_ERPAREN; |
2296 | 0 | return NULL; |
2297 | 0 | } |
2298 | 0 | FALLTHROUGH; |
2299 | 552 | case OP_CLOSE_DUP_NUM: |
2300 | | /* We treat it as a normal character. */ |
2301 | | |
2302 | | /* Then we can these characters as normal characters. */ |
2303 | 552 | token->type = CHARACTER; |
2304 | | /* mb_partial and word_char bits should be initialized already |
2305 | | by peek_token. */ |
2306 | 552 | tree = create_token_tree (dfa, NULL, NULL, token); |
2307 | 552 | if (__glibc_unlikely (tree == NULL)) |
2308 | 0 | { |
2309 | 0 | *err = REG_ESPACE; |
2310 | 0 | return NULL; |
2311 | 0 | } |
2312 | 552 | break; |
2313 | | |
2314 | 552 | case ANCHOR: |
2315 | 430 | if ((token->opr.ctx_type |
2316 | 430 | & (WORD_DELIM | NOT_WORD_DELIM | WORD_FIRST | WORD_LAST)) |
2317 | 430 | && dfa->word_ops_used == 0) |
2318 | 0 | init_word_char (dfa); |
2319 | 430 | if (token->opr.ctx_type == WORD_DELIM |
2320 | 430 | || token->opr.ctx_type == NOT_WORD_DELIM) |
2321 | 0 | { |
2322 | 0 | bin_tree_t *tree_first, *tree_last; |
2323 | 0 | if (token->opr.ctx_type == WORD_DELIM) |
2324 | 0 | { |
2325 | 0 | token->opr.ctx_type = WORD_FIRST; |
2326 | 0 | tree_first = create_token_tree (dfa, NULL, NULL, token); |
2327 | 0 | token->opr.ctx_type = WORD_LAST; |
2328 | 0 | } |
2329 | 0 | else |
2330 | 0 | { |
2331 | 0 | token->opr.ctx_type = INSIDE_WORD; |
2332 | 0 | tree_first = create_token_tree (dfa, NULL, NULL, token); |
2333 | 0 | token->opr.ctx_type = INSIDE_NOTWORD; |
2334 | 0 | } |
2335 | 0 | tree_last = create_token_tree (dfa, NULL, NULL, token); |
2336 | 0 | tree = create_tree (dfa, tree_first, tree_last, OP_ALT); |
2337 | 0 | if (__glibc_unlikely (tree_first == NULL || tree_last == NULL |
2338 | 0 | || tree == NULL)) |
2339 | 0 | { |
2340 | 0 | *err = REG_ESPACE; |
2341 | 0 | return NULL; |
2342 | 0 | } |
2343 | 0 | } |
2344 | 430 | else |
2345 | 430 | { |
2346 | 430 | tree = create_token_tree (dfa, NULL, NULL, token); |
2347 | 430 | if (__glibc_unlikely (tree == NULL)) |
2348 | 0 | { |
2349 | 0 | *err = REG_ESPACE; |
2350 | 0 | return NULL; |
2351 | 0 | } |
2352 | 430 | } |
2353 | | /* We must return here, since ANCHORs can't be followed |
2354 | | by repetition operators. |
2355 | | eg. RE"^*" is invalid or "<ANCHOR(^)><CHAR(*)>", |
2356 | | it must not be "<ANCHOR(^)><REPEAT(*)>". */ |
2357 | 430 | fetch_token (token, regexp, syntax); |
2358 | 430 | return tree; |
2359 | | |
2360 | 28.8k | case OP_PERIOD: |
2361 | 28.8k | tree = create_token_tree (dfa, NULL, NULL, token); |
2362 | 28.8k | if (__glibc_unlikely (tree == NULL)) |
2363 | 0 | { |
2364 | 0 | *err = REG_ESPACE; |
2365 | 0 | return NULL; |
2366 | 0 | } |
2367 | 28.8k | if (dfa->mb_cur_max > 1) |
2368 | 0 | dfa->has_mb_node = 1; |
2369 | 28.8k | break; |
2370 | | |
2371 | 0 | case OP_WORD: |
2372 | 0 | case OP_NOTWORD: |
2373 | 0 | tree = build_charclass_op (dfa, regexp->trans, |
2374 | 0 | "alnum", |
2375 | 0 | "_", |
2376 | 0 | token->type == OP_NOTWORD, err); |
2377 | 0 | if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL)) |
2378 | 0 | return NULL; |
2379 | 0 | break; |
2380 | | |
2381 | 0 | case OP_SPACE: |
2382 | 0 | case OP_NOTSPACE: |
2383 | 0 | tree = build_charclass_op (dfa, regexp->trans, |
2384 | 0 | "space", |
2385 | 0 | "", |
2386 | 0 | token->type == OP_NOTSPACE, err); |
2387 | 0 | if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL)) |
2388 | 0 | return NULL; |
2389 | 0 | break; |
2390 | | |
2391 | 97 | case OP_ALT: |
2392 | 97 | case END_OF_RE: |
2393 | 97 | return NULL; |
2394 | | |
2395 | 0 | case BACK_SLASH: |
2396 | 0 | *err = REG_EESCAPE; |
2397 | 0 | return NULL; |
2398 | | |
2399 | 0 | default: |
2400 | | /* Must not happen? */ |
2401 | 0 | DEBUG_ASSERT (false); |
2402 | 0 | return NULL; |
2403 | 7.13M | } |
2404 | 7.12M | fetch_token (token, regexp, syntax); |
2405 | | |
2406 | 7.15M | while (token->type == OP_DUP_ASTERISK || token->type == OP_DUP_PLUS |
2407 | 7.15M | || token->type == OP_DUP_QUESTION || token->type == OP_OPEN_DUP_NUM) |
2408 | 33.9k | { |
2409 | 33.9k | bin_tree_t *dup_tree = parse_dup_op (tree, regexp, dfa, token, |
2410 | 33.9k | syntax, err); |
2411 | 33.9k | if (__glibc_unlikely (*err != REG_NOERROR && dup_tree == NULL)) |
2412 | 0 | { |
2413 | 0 | if (tree != NULL) |
2414 | 0 | postorder (tree, free_tree, NULL); |
2415 | 0 | return NULL; |
2416 | 0 | } |
2417 | 33.9k | tree = dup_tree; |
2418 | | /* In BRE consecutive duplications are not allowed. */ |
2419 | 33.9k | if ((syntax & RE_CONTEXT_INVALID_DUP) |
2420 | 33.9k | && (token->type == OP_DUP_ASTERISK |
2421 | 33.9k | || token->type == OP_OPEN_DUP_NUM)) |
2422 | 0 | { |
2423 | 0 | if (tree != NULL) |
2424 | 0 | postorder (tree, free_tree, NULL); |
2425 | 0 | *err = REG_BADRPT; |
2426 | 0 | return NULL; |
2427 | 0 | } |
2428 | 33.9k | } |
2429 | | |
2430 | 7.12M | return tree; |
2431 | 7.12M | } |
2432 | | |
2433 | | /* This function build the following tree, from regular expression |
2434 | | (<reg_exp>): |
2435 | | SUBEXP |
2436 | | | |
2437 | | <reg_exp> |
2438 | | */ |
2439 | | |
2440 | | static bin_tree_t * |
2441 | | parse_sub_exp (re_string_t *regexp, regex_t *preg, re_token_t *token, |
2442 | | reg_syntax_t syntax, Idx nest, reg_errcode_t *err) |
2443 | 830k | { |
2444 | 830k | re_dfa_t *dfa = preg->buffer; |
2445 | 830k | bin_tree_t *tree; |
2446 | 830k | size_t cur_nsub; |
2447 | 830k | cur_nsub = preg->re_nsub++; |
2448 | | |
2449 | 830k | fetch_token (token, regexp, syntax | RE_CARET_ANCHORS_HERE); |
2450 | | |
2451 | | /* The subexpression may be a null string. */ |
2452 | 830k | if (token->type == OP_CLOSE_SUBEXP) |
2453 | 276k | tree = NULL; |
2454 | 553k | else |
2455 | 553k | { |
2456 | 553k | tree = parse_reg_exp (regexp, preg, token, syntax, nest, err); |
2457 | 553k | if (__glibc_unlikely (*err == REG_NOERROR |
2458 | 553k | && token->type != OP_CLOSE_SUBEXP)) |
2459 | 14 | { |
2460 | 14 | if (tree != NULL) |
2461 | 14 | postorder (tree, free_tree, NULL); |
2462 | 14 | *err = REG_EPAREN; |
2463 | 14 | } |
2464 | 553k | if (__glibc_unlikely (*err != REG_NOERROR)) |
2465 | 15.2k | return NULL; |
2466 | 553k | } |
2467 | | |
2468 | 815k | if (cur_nsub <= '9' - '1') |
2469 | 942 | dfa->completed_bkref_map |= 1 << cur_nsub; |
2470 | | |
2471 | 815k | tree = create_tree (dfa, tree, NULL, SUBEXP); |
2472 | 815k | if (__glibc_unlikely (tree == NULL)) |
2473 | 0 | { |
2474 | 0 | *err = REG_ESPACE; |
2475 | 0 | return NULL; |
2476 | 0 | } |
2477 | 815k | tree->token.opr.idx = cur_nsub; |
2478 | 815k | return tree; |
2479 | 815k | } |
2480 | | |
2481 | | /* This function parse repetition operators like "*", "+", "{1,3}" etc. */ |
2482 | | |
2483 | | static bin_tree_t * |
2484 | | parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa, |
2485 | | re_token_t *token, reg_syntax_t syntax, reg_errcode_t *err) |
2486 | 33.9k | { |
2487 | 33.9k | bin_tree_t *tree = NULL, *old_tree = NULL; |
2488 | 33.9k | Idx i, start, end, start_idx = re_string_cur_idx (regexp); |
2489 | 33.9k | re_token_t start_token = *token; |
2490 | | |
2491 | 33.9k | if (token->type == OP_OPEN_DUP_NUM) |
2492 | 0 | { |
2493 | 0 | end = 0; |
2494 | 0 | start = fetch_number (regexp, token, syntax); |
2495 | 0 | if (start == -1) |
2496 | 0 | { |
2497 | 0 | if (token->type == CHARACTER && token->opr.c == ',') |
2498 | 0 | start = 0; /* We treat "{,m}" as "{0,m}". */ |
2499 | 0 | else |
2500 | 0 | { |
2501 | 0 | *err = REG_BADBR; /* <re>{} is invalid. */ |
2502 | 0 | return NULL; |
2503 | 0 | } |
2504 | 0 | } |
2505 | 0 | if (__glibc_likely (start != -2)) |
2506 | 0 | { |
2507 | | /* We treat "{n}" as "{n,n}". */ |
2508 | 0 | end = ((token->type == OP_CLOSE_DUP_NUM) ? start |
2509 | 0 | : ((token->type == CHARACTER && token->opr.c == ',') |
2510 | 0 | ? fetch_number (regexp, token, syntax) : -2)); |
2511 | 0 | } |
2512 | 0 | if (__glibc_unlikely (start == -2 || end == -2)) |
2513 | 0 | { |
2514 | | /* Invalid sequence. */ |
2515 | 0 | if (__glibc_unlikely (!(syntax & RE_INVALID_INTERVAL_ORD))) |
2516 | 0 | { |
2517 | 0 | if (token->type == END_OF_RE) |
2518 | 0 | *err = REG_EBRACE; |
2519 | 0 | else |
2520 | 0 | *err = REG_BADBR; |
2521 | |
|
2522 | 0 | return NULL; |
2523 | 0 | } |
2524 | | |
2525 | | /* If the syntax bit is set, rollback. */ |
2526 | 0 | re_string_set_index (regexp, start_idx); |
2527 | 0 | *token = start_token; |
2528 | 0 | token->type = CHARACTER; |
2529 | | /* mb_partial and word_char bits should be already initialized by |
2530 | | peek_token. */ |
2531 | 0 | return elem; |
2532 | 0 | } |
2533 | | |
2534 | 0 | if (__glibc_unlikely ((end != -1 && start > end) |
2535 | 0 | || token->type != OP_CLOSE_DUP_NUM)) |
2536 | 0 | { |
2537 | | /* First number greater than second. */ |
2538 | 0 | *err = REG_BADBR; |
2539 | 0 | return NULL; |
2540 | 0 | } |
2541 | | |
2542 | 0 | if (__glibc_unlikely (RE_DUP_MAX < (end == -1 ? start : end))) |
2543 | 0 | { |
2544 | 0 | *err = REG_ESIZE; |
2545 | 0 | return NULL; |
2546 | 0 | } |
2547 | 0 | } |
2548 | 33.9k | else |
2549 | 33.9k | { |
2550 | 33.9k | start = (token->type == OP_DUP_PLUS) ? 1 : 0; |
2551 | 33.9k | end = (token->type == OP_DUP_QUESTION) ? 1 : -1; |
2552 | 33.9k | } |
2553 | | |
2554 | 33.9k | fetch_token (token, regexp, syntax); |
2555 | | |
2556 | 33.9k | if (__glibc_unlikely (elem == NULL)) |
2557 | 0 | return NULL; |
2558 | 33.9k | if (__glibc_unlikely (start == 0 && end == 0)) |
2559 | 0 | { |
2560 | 0 | postorder (elem, free_tree, NULL); |
2561 | 0 | return NULL; |
2562 | 0 | } |
2563 | | |
2564 | | /* Extract "<re>{n,m}" to "<re><re>...<re><re>{0,<m-n>}". */ |
2565 | 33.9k | if (__glibc_unlikely (start > 0)) |
2566 | 2.73k | { |
2567 | 2.73k | tree = elem; |
2568 | 2.73k | for (i = 2; i <= start; ++i) |
2569 | 0 | { |
2570 | 0 | elem = duplicate_tree (elem, dfa); |
2571 | 0 | tree = create_tree (dfa, tree, elem, CONCAT); |
2572 | 0 | if (__glibc_unlikely (elem == NULL || tree == NULL)) |
2573 | 0 | goto parse_dup_op_espace; |
2574 | 0 | } |
2575 | | |
2576 | 2.73k | if (start == end) |
2577 | 0 | return tree; |
2578 | | |
2579 | | /* Duplicate ELEM before it is marked optional. */ |
2580 | 2.73k | elem = duplicate_tree (elem, dfa); |
2581 | 2.73k | if (__glibc_unlikely (elem == NULL)) |
2582 | 0 | goto parse_dup_op_espace; |
2583 | 2.73k | old_tree = tree; |
2584 | 2.73k | } |
2585 | 31.2k | else |
2586 | 31.2k | old_tree = NULL; |
2587 | | |
2588 | 33.9k | if (elem->token.type == SUBEXP) |
2589 | 79 | { |
2590 | 79 | uintptr_t subidx = elem->token.opr.idx; |
2591 | 79 | postorder (elem, mark_opt_subexp, (void *) subidx); |
2592 | 79 | } |
2593 | | |
2594 | 33.9k | tree = create_tree (dfa, elem, NULL, |
2595 | 33.9k | (end == -1 ? OP_DUP_ASTERISK : OP_ALT)); |
2596 | 33.9k | if (__glibc_unlikely (tree == NULL)) |
2597 | 0 | goto parse_dup_op_espace; |
2598 | | |
2599 | | /* This loop is actually executed only when end != -1, |
2600 | | to rewrite <re>{0,n} as (<re>(<re>...<re>?)?)?... We have |
2601 | | already created the start+1-th copy. */ |
2602 | 33.9k | if (TYPE_SIGNED (Idx) || end != -1) |
2603 | 33.9k | for (i = start + 2; i <= end; ++i) |
2604 | 0 | { |
2605 | 0 | elem = duplicate_tree (elem, dfa); |
2606 | 0 | tree = create_tree (dfa, tree, elem, CONCAT); |
2607 | 0 | if (__glibc_unlikely (elem == NULL || tree == NULL)) |
2608 | 0 | goto parse_dup_op_espace; |
2609 | | |
2610 | 0 | tree = create_tree (dfa, tree, NULL, OP_ALT); |
2611 | 0 | if (__glibc_unlikely (tree == NULL)) |
2612 | 0 | goto parse_dup_op_espace; |
2613 | 0 | } |
2614 | | |
2615 | 33.9k | if (old_tree) |
2616 | 2.73k | tree = create_tree (dfa, old_tree, tree, CONCAT); |
2617 | | |
2618 | 33.9k | return tree; |
2619 | | |
2620 | 0 | parse_dup_op_espace: |
2621 | 0 | *err = REG_ESPACE; |
2622 | 0 | return NULL; |
2623 | 33.9k | } |
2624 | | |
2625 | | /* Size of the names for collating symbol/equivalence_class/character_class. |
2626 | | I'm not sure, but maybe enough. */ |
2627 | 166 | #define BRACKET_NAME_BUF_SIZE 32 |
2628 | | |
2629 | | #ifndef _LIBC |
2630 | | |
2631 | | /* Convert the byte B to the corresponding wide character. In a |
2632 | | unibyte locale, treat B as itself. In a multibyte locale, return |
2633 | | WEOF if B is an encoding error. */ |
2634 | | static wint_t |
2635 | | parse_byte (unsigned char b, re_dfa_t const *dfa) |
2636 | 32.9k | { |
2637 | 32.9k | return dfa->mb_cur_max > 1 ? __btowc (b) : b; |
2638 | 32.9k | } |
2639 | | |
2640 | | /* Local function for parse_bracket_exp used in _LIBC environment. |
2641 | | Build the range expression which starts from START_ELEM, and ends |
2642 | | at END_ELEM. The result are written to MBCSET and SBCSET. |
2643 | | RANGE_ALLOC is the allocated size of mbcset->range_starts, and |
2644 | | mbcset->range_ends, is a pointer argument since we may |
2645 | | update it. */ |
2646 | | |
2647 | | static reg_errcode_t |
2648 | | build_range_exp (bitset_t sbcset, re_charset_t *mbcset, Idx *range_alloc, |
2649 | | bracket_elem_t *start_elem, bracket_elem_t *end_elem, |
2650 | | re_dfa_t *dfa, reg_syntax_t syntax, uint_fast32_t nrules, |
2651 | | const unsigned char *collseqmb, const char *collseqwc, |
2652 | | int_fast32_t table_size, const void *symb_table, |
2653 | | const unsigned char *extra) |
2654 | 16.4k | { |
2655 | | /* Equivalence Classes and Character Classes can't be a range start/end. */ |
2656 | 16.4k | if (__glibc_unlikely (start_elem->type == EQUIV_CLASS |
2657 | 16.4k | || start_elem->type == CHAR_CLASS |
2658 | 16.4k | || end_elem->type == EQUIV_CLASS |
2659 | 16.4k | || end_elem->type == CHAR_CLASS)) |
2660 | 0 | return REG_ERANGE; |
2661 | | |
2662 | | /* We can handle no multi character collating elements without libc |
2663 | | support. */ |
2664 | 16.4k | if (__glibc_unlikely ((start_elem->type == COLL_SYM |
2665 | 16.4k | && strlen ((char *) start_elem->opr.name) > 1) |
2666 | 16.4k | || (end_elem->type == COLL_SYM |
2667 | 16.4k | && strlen ((char *) end_elem->opr.name) > 1))) |
2668 | 0 | return REG_ECOLLATE; |
2669 | | |
2670 | 16.4k | unsigned int |
2671 | 16.4k | start_ch = ((start_elem->type == SB_CHAR) ? start_elem->opr.ch |
2672 | 16.4k | : ((start_elem->type == COLL_SYM) ? start_elem->opr.name[0] |
2673 | 0 | : 0)), |
2674 | 16.4k | end_ch = ((end_elem->type == SB_CHAR) ? end_elem->opr.ch |
2675 | 16.4k | : ((end_elem->type == COLL_SYM) ? end_elem->opr.name[0] |
2676 | 0 | : 0)); |
2677 | 16.4k | wint_t |
2678 | 16.4k | start_wc = ((start_elem->type == SB_CHAR || start_elem->type == COLL_SYM) |
2679 | 16.4k | ? parse_byte (start_ch, dfa) : start_elem->opr.wch), |
2680 | 16.4k | end_wc = ((end_elem->type == SB_CHAR || end_elem->type == COLL_SYM) |
2681 | 16.4k | ? parse_byte (end_ch, dfa) : end_elem->opr.wch); |
2682 | | |
2683 | 16.4k | if (start_wc == WEOF || end_wc == WEOF) |
2684 | 0 | return REG_ECOLLATE; |
2685 | 16.4k | else if (__glibc_unlikely ((syntax & RE_NO_EMPTY_RANGES) |
2686 | 16.4k | && start_wc > end_wc)) |
2687 | 10 | return REG_ERANGE; |
2688 | | |
2689 | | /* Got valid collation sequence values, add them as a new entry. |
2690 | | However, for !_LIBC we have no collation elements: if the |
2691 | | character set is single byte, the single byte character set |
2692 | | that we build below suffices. parse_bracket_exp passes |
2693 | | no MBCSET if dfa->mb_cur_max == 1. */ |
2694 | 16.4k | if (dfa->mb_cur_max > 1) |
2695 | 0 | { |
2696 | | /* Check the space of the arrays. */ |
2697 | 0 | if (__glibc_unlikely (*range_alloc == mbcset->nranges)) |
2698 | 0 | { |
2699 | | /* There is not enough space, need realloc. */ |
2700 | 0 | wchar_t *new_array_start, *new_array_end; |
2701 | 0 | Idx new_nranges; |
2702 | | |
2703 | | /* +1 in case of mbcset->nranges is 0. */ |
2704 | 0 | new_nranges = 2 * mbcset->nranges + 1; |
2705 | | /* Use realloc since mbcset->range_starts and mbcset->range_ends |
2706 | | are NULL if *range_alloc == 0. */ |
2707 | 0 | new_array_start = re_realloc (mbcset->range_starts, wchar_t, |
2708 | 0 | new_nranges); |
2709 | 0 | new_array_end = re_realloc (mbcset->range_ends, wchar_t, |
2710 | 0 | new_nranges); |
2711 | |
|
2712 | 0 | if (__glibc_unlikely (new_array_start == NULL |
2713 | 0 | || new_array_end == NULL)) |
2714 | 0 | { |
2715 | 0 | re_free (new_array_start); |
2716 | 0 | re_free (new_array_end); |
2717 | 0 | return REG_ESPACE; |
2718 | 0 | } |
2719 | | |
2720 | 0 | mbcset->range_starts = new_array_start; |
2721 | 0 | mbcset->range_ends = new_array_end; |
2722 | 0 | *range_alloc = new_nranges; |
2723 | 0 | } |
2724 | | |
2725 | 0 | mbcset->range_starts[mbcset->nranges] = start_wc; |
2726 | 0 | mbcset->range_ends[mbcset->nranges++] = end_wc; |
2727 | 0 | } |
2728 | | |
2729 | | /* Build the table for single byte characters. */ |
2730 | 4.22M | for (wchar_t wc = 0; wc < SBC_MAX; ++wc) |
2731 | 4.21M | { |
2732 | 4.21M | if (start_wc <= wc && wc <= end_wc) |
2733 | 92.3k | bitset_set (sbcset, wc); |
2734 | 4.21M | } |
2735 | | |
2736 | 16.4k | return REG_NOERROR; |
2737 | 16.4k | } |
2738 | | #endif /* not _LIBC */ |
2739 | | |
2740 | | #ifndef _LIBC |
2741 | | /* Helper function for parse_bracket_exp only used in case of NOT _LIBC. |
2742 | | Build the collating element which is represented by NAME. |
2743 | | The result are written to MBCSET and SBCSET. |
2744 | | COLL_SYM_ALLOC is the allocated size of mbcset->coll_sym, is a |
2745 | | pointer argument since we may update it. */ |
2746 | | |
2747 | | static reg_errcode_t |
2748 | | build_collating_symbol (bitset_t sbcset, re_charset_t *mbcset, |
2749 | | Idx *coll_sym_alloc, const unsigned char *name, |
2750 | | uint_fast32_t nrules, int_fast32_t table_size, |
2751 | | const void *symb_table, const unsigned char *extra) |
2752 | 83 | { |
2753 | 83 | size_t name_len = strlen ((const char *) name); |
2754 | 83 | if (__glibc_unlikely (name_len != 1)) |
2755 | 0 | return REG_ECOLLATE; |
2756 | 83 | else |
2757 | 83 | { |
2758 | 83 | bitset_set (sbcset, name[0]); |
2759 | 83 | return REG_NOERROR; |
2760 | 83 | } |
2761 | 83 | } |
2762 | | #endif /* not _LIBC */ |
2763 | | |
2764 | | #ifdef _LIBC |
2765 | | /* Local function for parse_bracket_exp used in _LIBC environment. |
2766 | | Seek the collating symbol entry corresponding to NAME. |
2767 | | Return the index of the symbol in the SYMB_TABLE, |
2768 | | or -1 if not found. */ |
2769 | | |
2770 | | static __always_inline int32_t |
2771 | | seek_collating_symbol_entry (const unsigned char *name, size_t name_len, |
2772 | | const int32_t *symb_table, |
2773 | | int_fast32_t table_size, |
2774 | | const unsigned char *extra) |
2775 | | { |
2776 | | int_fast32_t elem; |
2777 | | |
2778 | | for (elem = 0; elem < table_size; elem++) |
2779 | | if (symb_table[2 * elem] != 0) |
2780 | | { |
2781 | | int32_t idx = symb_table[2 * elem + 1]; |
2782 | | /* Skip the name of collating element name. */ |
2783 | | idx += 1 + extra[idx]; |
2784 | | if (/* Compare the length of the name. */ |
2785 | | name_len == extra[idx] |
2786 | | /* Compare the name. */ |
2787 | | && memcmp (name, &extra[idx + 1], name_len) == 0) |
2788 | | /* Yep, this is the entry. */ |
2789 | | return elem; |
2790 | | } |
2791 | | return -1; |
2792 | | } |
2793 | | |
2794 | | /* Local function for parse_bracket_exp used in _LIBC environment. |
2795 | | Look up the collation sequence value of BR_ELEM. |
2796 | | Return the value if succeeded, UINT_MAX otherwise. */ |
2797 | | |
2798 | | static __always_inline unsigned int |
2799 | | lookup_collation_sequence_value (bracket_elem_t *br_elem, uint32_t nrules, |
2800 | | const unsigned char *collseqmb, |
2801 | | const char *collseqwc, |
2802 | | int_fast32_t table_size, |
2803 | | const int32_t *symb_table, |
2804 | | const unsigned char *extra) |
2805 | | { |
2806 | | if (br_elem->type == SB_CHAR) |
2807 | | { |
2808 | | /* if (MB_CUR_MAX == 1) */ |
2809 | | if (nrules == 0) |
2810 | | return collseqmb[br_elem->opr.ch]; |
2811 | | else |
2812 | | { |
2813 | | wint_t wc = __btowc (br_elem->opr.ch); |
2814 | | return __collseq_table_lookup (collseqwc, wc); |
2815 | | } |
2816 | | } |
2817 | | else if (br_elem->type == MB_CHAR) |
2818 | | { |
2819 | | if (nrules != 0) |
2820 | | return __collseq_table_lookup (collseqwc, br_elem->opr.wch); |
2821 | | } |
2822 | | else if (br_elem->type == COLL_SYM) |
2823 | | { |
2824 | | size_t sym_name_len = strlen ((char *) br_elem->opr.name); |
2825 | | if (nrules != 0) |
2826 | | { |
2827 | | int32_t elem, idx; |
2828 | | elem = seek_collating_symbol_entry (br_elem->opr.name, |
2829 | | sym_name_len, |
2830 | | symb_table, table_size, |
2831 | | extra); |
2832 | | if (elem != -1) |
2833 | | { |
2834 | | /* We found the entry. */ |
2835 | | idx = symb_table[2 * elem + 1]; |
2836 | | /* Skip the name of collating element name. */ |
2837 | | idx += 1 + extra[idx]; |
2838 | | /* Skip the byte sequence of the collating element. */ |
2839 | | idx += 1 + extra[idx]; |
2840 | | /* Adjust for the alignment. */ |
2841 | | idx = (idx + 3) & ~3; |
2842 | | /* Skip the multibyte collation sequence value. */ |
2843 | | idx += sizeof (unsigned int); |
2844 | | /* Skip the wide char sequence of the collating element. */ |
2845 | | idx += sizeof (unsigned int) * |
2846 | | (1 + *(unsigned int *) (extra + idx)); |
2847 | | /* Return the collation sequence value. */ |
2848 | | return *(unsigned int *) (extra + idx); |
2849 | | } |
2850 | | else if (sym_name_len == 1) |
2851 | | { |
2852 | | /* No valid character. Match it as a single byte |
2853 | | character. */ |
2854 | | return collseqmb[br_elem->opr.name[0]]; |
2855 | | } |
2856 | | } |
2857 | | else if (sym_name_len == 1) |
2858 | | return collseqmb[br_elem->opr.name[0]]; |
2859 | | } |
2860 | | return UINT_MAX; |
2861 | | } |
2862 | | |
2863 | | /* Local function for parse_bracket_exp used in _LIBC environment. |
2864 | | Build the range expression which starts from START_ELEM, and ends |
2865 | | at END_ELEM. The result are written to MBCSET and SBCSET. |
2866 | | RANGE_ALLOC is the allocated size of mbcset->range_starts, and |
2867 | | mbcset->range_ends, is a pointer argument since we may |
2868 | | update it. */ |
2869 | | |
2870 | | static __always_inline reg_errcode_t |
2871 | | build_range_exp (bitset_t sbcset, re_charset_t *mbcset, Idx *range_alloc, |
2872 | | bracket_elem_t *start_elem, bracket_elem_t *end_elem, |
2873 | | re_dfa_t *dfa, reg_syntax_t syntax, uint32_t nrules, |
2874 | | const unsigned char *collseqmb, const char *collseqwc, |
2875 | | int_fast32_t table_size, const int32_t *symb_table, |
2876 | | const unsigned char *extra) |
2877 | | { |
2878 | | unsigned int ch; |
2879 | | uint32_t start_collseq; |
2880 | | uint32_t end_collseq; |
2881 | | |
2882 | | /* Equivalence Classes and Character Classes can't be a range |
2883 | | start/end. */ |
2884 | | if (__glibc_unlikely (start_elem->type == EQUIV_CLASS |
2885 | | || start_elem->type == CHAR_CLASS |
2886 | | || end_elem->type == EQUIV_CLASS |
2887 | | || end_elem->type == CHAR_CLASS)) |
2888 | | return REG_ERANGE; |
2889 | | |
2890 | | /* FIXME: Implement rational ranges here, too. */ |
2891 | | start_collseq = lookup_collation_sequence_value (start_elem, nrules, collseqmb, collseqwc, |
2892 | | table_size, symb_table, extra); |
2893 | | end_collseq = lookup_collation_sequence_value (end_elem, nrules, collseqmb, collseqwc, |
2894 | | table_size, symb_table, extra); |
2895 | | /* Check start/end collation sequence values. */ |
2896 | | if (__glibc_unlikely (start_collseq == UINT_MAX |
2897 | | || end_collseq == UINT_MAX)) |
2898 | | return REG_ECOLLATE; |
2899 | | if (__glibc_unlikely ((syntax & RE_NO_EMPTY_RANGES) |
2900 | | && start_collseq > end_collseq)) |
2901 | | return REG_ERANGE; |
2902 | | |
2903 | | /* Got valid collation sequence values, add them as a new entry. |
2904 | | However, if we have no collation elements, and the character set |
2905 | | is single byte, the single byte character set that we |
2906 | | build below suffices. */ |
2907 | | if (nrules > 0 || dfa->mb_cur_max > 1) |
2908 | | { |
2909 | | /* Check the space of the arrays. */ |
2910 | | if (__glibc_unlikely (*range_alloc == mbcset->nranges)) |
2911 | | { |
2912 | | /* There is not enough space, need realloc. */ |
2913 | | uint32_t *new_array_start; |
2914 | | uint32_t *new_array_end; |
2915 | | int new_nranges; |
2916 | | |
2917 | | /* +1 in case of mbcset->nranges is 0. */ |
2918 | | new_nranges = 2 * mbcset->nranges + 1; |
2919 | | new_array_start = re_realloc (mbcset->range_starts, uint32_t, |
2920 | | new_nranges); |
2921 | | new_array_end = re_realloc (mbcset->range_ends, uint32_t, |
2922 | | new_nranges); |
2923 | | |
2924 | | if (__glibc_unlikely (new_array_start == NULL |
2925 | | || new_array_end == NULL)) |
2926 | | return REG_ESPACE; |
2927 | | |
2928 | | mbcset->range_starts = new_array_start; |
2929 | | mbcset->range_ends = new_array_end; |
2930 | | *range_alloc = new_nranges; |
2931 | | } |
2932 | | |
2933 | | mbcset->range_starts[mbcset->nranges] = start_collseq; |
2934 | | mbcset->range_ends[mbcset->nranges++] = end_collseq; |
2935 | | } |
2936 | | |
2937 | | /* Build the table for single byte characters. */ |
2938 | | for (ch = 0; ch < SBC_MAX; ch++) |
2939 | | { |
2940 | | uint32_t ch_collseq; |
2941 | | /* if (MB_CUR_MAX == 1) */ |
2942 | | if (nrules == 0) |
2943 | | ch_collseq = collseqmb[ch]; |
2944 | | else |
2945 | | ch_collseq = __collseq_table_lookup (collseqwc, __btowc (ch)); |
2946 | | if (start_collseq <= ch_collseq && ch_collseq <= end_collseq) |
2947 | | bitset_set (sbcset, ch); |
2948 | | } |
2949 | | return REG_NOERROR; |
2950 | | } |
2951 | | |
2952 | | /* Local function for parse_bracket_exp used in _LIBC environment. |
2953 | | Build the collating element which is represented by NAME. |
2954 | | The result are written to MBCSET and SBCSET. |
2955 | | COLL_SYM_ALLOC is the allocated size of mbcset->coll_sym, is a |
2956 | | pointer argument since we may update it. */ |
2957 | | |
2958 | | static __always_inline reg_errcode_t |
2959 | | build_collating_symbol (bitset_t sbcset, re_charset_t *mbcset, |
2960 | | Idx *coll_sym_alloc, const unsigned char *name, |
2961 | | uint_fast32_t nrules, int_fast32_t table_size, |
2962 | | const int32_t *symb_table, const unsigned char *extra) |
2963 | | { |
2964 | | int32_t elem, idx; |
2965 | | size_t name_len = strlen ((const char *) name); |
2966 | | if (nrules != 0) |
2967 | | { |
2968 | | elem = seek_collating_symbol_entry (name, name_len, symb_table, |
2969 | | table_size, extra); |
2970 | | if (elem != -1) |
2971 | | { |
2972 | | /* We found the entry. */ |
2973 | | idx = symb_table[2 * elem + 1]; |
2974 | | /* Skip the name of collating element name. */ |
2975 | | idx += 1 + extra[idx]; |
2976 | | } |
2977 | | else if (name_len == 1) |
2978 | | { |
2979 | | /* No valid character, treat it as a normal |
2980 | | character. */ |
2981 | | bitset_set (sbcset, name[0]); |
2982 | | return REG_NOERROR; |
2983 | | } |
2984 | | else |
2985 | | return REG_ECOLLATE; |
2986 | | |
2987 | | /* Got valid collation sequence, add it as a new entry. */ |
2988 | | /* Check the space of the arrays. */ |
2989 | | if (__glibc_unlikely (*coll_sym_alloc == mbcset->ncoll_syms)) |
2990 | | { |
2991 | | /* Not enough, realloc it. */ |
2992 | | /* +1 in case of mbcset->ncoll_syms is 0. */ |
2993 | | int new_coll_sym_alloc = 2 * mbcset->ncoll_syms + 1; |
2994 | | /* Use realloc since mbcset->coll_syms is NULL |
2995 | | if *alloc == 0. */ |
2996 | | int32_t *new_coll_syms = re_realloc (mbcset->coll_syms, int32_t, |
2997 | | new_coll_sym_alloc); |
2998 | | if (__glibc_unlikely (new_coll_syms == NULL)) |
2999 | | return REG_ESPACE; |
3000 | | mbcset->coll_syms = new_coll_syms; |
3001 | | *coll_sym_alloc = new_coll_sym_alloc; |
3002 | | } |
3003 | | mbcset->coll_syms[mbcset->ncoll_syms++] = idx; |
3004 | | return REG_NOERROR; |
3005 | | } |
3006 | | else |
3007 | | { |
3008 | | if (__glibc_unlikely (name_len != 1)) |
3009 | | return REG_ECOLLATE; |
3010 | | else |
3011 | | { |
3012 | | bitset_set (sbcset, name[0]); |
3013 | | return REG_NOERROR; |
3014 | | } |
3015 | | } |
3016 | | } |
3017 | | #endif /* _LIBC */ |
3018 | | |
3019 | | /* This function parse bracket expression like "[abc]", "[a-c]", |
3020 | | "[[.a-a.]]" etc. */ |
3021 | | |
3022 | | static bin_tree_t * |
3023 | | parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token, |
3024 | | reg_syntax_t syntax, reg_errcode_t *err) |
3025 | 17.0k | { |
3026 | 17.0k | const unsigned char *collseqmb = NULL; |
3027 | 17.0k | const char *collseqwc = NULL; |
3028 | 17.0k | uint_fast32_t nrules = 0; |
3029 | 17.0k | int_fast32_t table_size = 0; |
3030 | 17.0k | const void *symb_table = NULL; |
3031 | 17.0k | const unsigned char *extra = NULL; |
3032 | | |
3033 | 17.0k | re_token_t br_token; |
3034 | 17.0k | re_bitset_ptr_t sbcset; |
3035 | 17.0k | re_charset_t *mbcset; |
3036 | 17.0k | Idx coll_sym_alloc = 0, range_alloc = 0, mbchar_alloc = 0; |
3037 | 17.0k | Idx equiv_class_alloc = 0, char_class_alloc = 0; |
3038 | 17.0k | bool non_match = false; |
3039 | 17.0k | bin_tree_t *work_tree; |
3040 | 17.0k | int token_len; |
3041 | 17.0k | bool first_round = true; |
3042 | | #ifdef _LIBC |
3043 | | collseqmb = (const unsigned char *) |
3044 | | _NL_CURRENT (LC_COLLATE, _NL_COLLATE_COLLSEQMB); |
3045 | | nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); |
3046 | | if (nrules) |
3047 | | { |
3048 | | /* |
3049 | | if (MB_CUR_MAX > 1) |
3050 | | */ |
3051 | | collseqwc = _NL_CURRENT (LC_COLLATE, _NL_COLLATE_COLLSEQWC); |
3052 | | table_size = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_SYMB_HASH_SIZEMB); |
3053 | | symb_table = _NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_TABLEMB); |
3054 | | extra = (const unsigned char *) _NL_CURRENT (LC_COLLATE, |
3055 | | _NL_COLLATE_SYMB_EXTRAMB); |
3056 | | } |
3057 | | #endif |
3058 | 17.0k | sbcset = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1); |
3059 | 17.0k | mbcset = (re_charset_t *) calloc (sizeof (re_charset_t), 1); |
3060 | 17.0k | if (__glibc_unlikely (sbcset == NULL || mbcset == NULL)) |
3061 | 0 | { |
3062 | 0 | re_free (sbcset); |
3063 | 0 | re_free (mbcset); |
3064 | 0 | *err = REG_ESPACE; |
3065 | 0 | return NULL; |
3066 | 0 | } |
3067 | | |
3068 | 17.0k | token_len = peek_token_bracket (token, regexp, syntax); |
3069 | 17.0k | if (__glibc_unlikely (token->type == END_OF_RE)) |
3070 | 0 | { |
3071 | 0 | *err = REG_BADPAT; |
3072 | 0 | goto parse_bracket_exp_free_return; |
3073 | 0 | } |
3074 | 17.0k | if (token->type == OP_NON_MATCH_LIST) |
3075 | 12.2k | { |
3076 | 12.2k | mbcset->non_match = 1; |
3077 | 12.2k | non_match = true; |
3078 | 12.2k | if (syntax & RE_HAT_LISTS_NOT_NEWLINE) |
3079 | 0 | bitset_set (sbcset, '\n'); |
3080 | 12.2k | re_string_skip_bytes (regexp, token_len); /* Skip a token. */ |
3081 | 12.2k | token_len = peek_token_bracket (token, regexp, syntax); |
3082 | 12.2k | if (__glibc_unlikely (token->type == END_OF_RE)) |
3083 | 0 | { |
3084 | 0 | *err = REG_BADPAT; |
3085 | 0 | goto parse_bracket_exp_free_return; |
3086 | 0 | } |
3087 | 12.2k | } |
3088 | | |
3089 | | /* We treat the first ']' as a normal character. */ |
3090 | 17.0k | if (token->type == OP_CLOSE_BRACKET) |
3091 | 3.67k | token->type = CHARACTER; |
3092 | | |
3093 | 62.2M | while (1) |
3094 | 62.2M | { |
3095 | 62.2M | bracket_elem_t start_elem, end_elem; |
3096 | 62.2M | unsigned char start_name_buf[BRACKET_NAME_BUF_SIZE]; |
3097 | 62.2M | unsigned char end_name_buf[BRACKET_NAME_BUF_SIZE]; |
3098 | 62.2M | reg_errcode_t ret; |
3099 | 62.2M | int token_len2 = 0; |
3100 | 62.2M | bool is_range_exp = false; |
3101 | 62.2M | re_token_t token2; |
3102 | | |
3103 | 62.2M | start_elem.opr.name = start_name_buf; |
3104 | 62.2M | start_elem.type = COLL_SYM; |
3105 | 62.2M | ret = parse_bracket_element (&start_elem, regexp, token, token_len, dfa, |
3106 | 62.2M | syntax, first_round); |
3107 | 62.2M | if (__glibc_unlikely (ret != REG_NOERROR)) |
3108 | 0 | { |
3109 | 0 | *err = ret; |
3110 | 0 | goto parse_bracket_exp_free_return; |
3111 | 0 | } |
3112 | 62.2M | first_round = false; |
3113 | | |
3114 | | /* Get information about the next token. We need it in any case. */ |
3115 | 62.2M | token_len = peek_token_bracket (token, regexp, syntax); |
3116 | | |
3117 | | /* Do not check for ranges if we know they are not allowed. */ |
3118 | 62.2M | if (start_elem.type != CHAR_CLASS && start_elem.type != EQUIV_CLASS) |
3119 | 62.2M | { |
3120 | 62.2M | if (__glibc_unlikely (token->type == END_OF_RE)) |
3121 | 0 | { |
3122 | 0 | *err = REG_EBRACK; |
3123 | 0 | goto parse_bracket_exp_free_return; |
3124 | 0 | } |
3125 | 62.2M | if (token->type == OP_CHARSET_RANGE) |
3126 | 16.4k | { |
3127 | 16.4k | re_string_skip_bytes (regexp, token_len); /* Skip '-'. */ |
3128 | 16.4k | token_len2 = peek_token_bracket (&token2, regexp, syntax); |
3129 | 16.4k | if (__glibc_unlikely (token2.type == END_OF_RE)) |
3130 | 0 | { |
3131 | 0 | *err = REG_EBRACK; |
3132 | 0 | goto parse_bracket_exp_free_return; |
3133 | 0 | } |
3134 | 16.4k | if (token2.type == OP_CLOSE_BRACKET) |
3135 | 0 | { |
3136 | | /* We treat the last '-' as a normal character. */ |
3137 | 0 | re_string_skip_bytes (regexp, -token_len); |
3138 | 0 | token->type = CHARACTER; |
3139 | 0 | } |
3140 | 16.4k | else |
3141 | 16.4k | is_range_exp = true; |
3142 | 16.4k | } |
3143 | 62.2M | } |
3144 | | |
3145 | 62.2M | if (is_range_exp == true) |
3146 | 16.4k | { |
3147 | 16.4k | end_elem.opr.name = end_name_buf; |
3148 | 16.4k | end_elem.type = COLL_SYM; |
3149 | 16.4k | ret = parse_bracket_element (&end_elem, regexp, &token2, token_len2, |
3150 | 16.4k | dfa, syntax, true); |
3151 | 16.4k | if (__glibc_unlikely (ret != REG_NOERROR)) |
3152 | 0 | { |
3153 | 0 | *err = ret; |
3154 | 0 | goto parse_bracket_exp_free_return; |
3155 | 0 | } |
3156 | | |
3157 | 16.4k | token_len = peek_token_bracket (token, regexp, syntax); |
3158 | | |
3159 | 16.4k | *err = build_range_exp (sbcset, mbcset, &range_alloc, |
3160 | 16.4k | &start_elem, &end_elem, |
3161 | 16.4k | dfa, syntax, nrules, collseqmb, collseqwc, |
3162 | 16.4k | table_size, symb_table, extra); |
3163 | 16.4k | if (__glibc_unlikely (*err != REG_NOERROR)) |
3164 | 10 | goto parse_bracket_exp_free_return; |
3165 | 16.4k | } |
3166 | 62.1M | else |
3167 | 62.1M | { |
3168 | 62.1M | switch (start_elem.type) |
3169 | 62.1M | { |
3170 | 62.1M | case SB_CHAR: |
3171 | 62.1M | bitset_set (sbcset, start_elem.opr.ch); |
3172 | 62.1M | break; |
3173 | 0 | case MB_CHAR: |
3174 | | /* Check whether the array has enough space. */ |
3175 | 0 | if (__glibc_unlikely (mbchar_alloc == mbcset->nmbchars)) |
3176 | 0 | { |
3177 | 0 | wchar_t *new_mbchars; |
3178 | | /* Not enough, realloc it. */ |
3179 | | /* +1 in case of mbcset->nmbchars is 0. */ |
3180 | 0 | mbchar_alloc = 2 * mbcset->nmbchars + 1; |
3181 | | /* Use realloc since array is NULL if *alloc == 0. */ |
3182 | 0 | new_mbchars = re_realloc (mbcset->mbchars, wchar_t, |
3183 | 0 | mbchar_alloc); |
3184 | 0 | if (__glibc_unlikely (new_mbchars == NULL)) |
3185 | 0 | goto parse_bracket_exp_espace; |
3186 | 0 | mbcset->mbchars = new_mbchars; |
3187 | 0 | } |
3188 | 0 | mbcset->mbchars[mbcset->nmbchars++] = start_elem.opr.wch; |
3189 | 0 | break; |
3190 | 0 | case EQUIV_CLASS: |
3191 | 0 | *err = build_equiv_class (sbcset, |
3192 | 0 | mbcset, &equiv_class_alloc, |
3193 | 0 | start_elem.opr.name); |
3194 | 0 | if (__glibc_unlikely (*err != REG_NOERROR)) |
3195 | 0 | goto parse_bracket_exp_free_return; |
3196 | 0 | break; |
3197 | 83 | case COLL_SYM: |
3198 | 83 | *err = build_collating_symbol (sbcset, |
3199 | 83 | mbcset, &coll_sym_alloc, |
3200 | 83 | start_elem.opr.name, |
3201 | 83 | nrules, table_size, symb_table, extra); |
3202 | 83 | if (__glibc_unlikely (*err != REG_NOERROR)) |
3203 | 0 | goto parse_bracket_exp_free_return; |
3204 | 83 | break; |
3205 | 83 | case CHAR_CLASS: |
3206 | 0 | *err = build_charclass (regexp->trans, sbcset, |
3207 | 0 | mbcset, &char_class_alloc, |
3208 | 0 | (const char *) start_elem.opr.name, |
3209 | 0 | syntax); |
3210 | 0 | if (__glibc_unlikely (*err != REG_NOERROR)) |
3211 | 0 | goto parse_bracket_exp_free_return; |
3212 | 0 | break; |
3213 | 0 | default: |
3214 | 0 | DEBUG_ASSERT (false); |
3215 | 0 | break; |
3216 | 62.1M | } |
3217 | 62.1M | } |
3218 | 62.2M | if (__glibc_unlikely (token->type == END_OF_RE)) |
3219 | 0 | { |
3220 | 0 | *err = REG_EBRACK; |
3221 | 0 | goto parse_bracket_exp_free_return; |
3222 | 0 | } |
3223 | 62.2M | if (token->type == OP_CLOSE_BRACKET) |
3224 | 17.0k | break; |
3225 | 62.2M | } |
3226 | | |
3227 | 17.0k | re_string_skip_bytes (regexp, token_len); /* Skip a token. */ |
3228 | | |
3229 | | /* If it is non-matching list. */ |
3230 | 17.0k | if (non_match) |
3231 | 12.2k | bitset_not (sbcset); |
3232 | | |
3233 | | /* Ensure only single byte characters are set. */ |
3234 | 17.0k | if (dfa->mb_cur_max > 1) |
3235 | 0 | bitset_mask (sbcset, dfa->sb_char); |
3236 | | |
3237 | 17.0k | if (mbcset->nmbchars || mbcset->ncoll_syms || mbcset->nequiv_classes |
3238 | 17.0k | || mbcset->nranges || (dfa->mb_cur_max > 1 && (mbcset->nchar_classes |
3239 | 0 | || mbcset->non_match))) |
3240 | 0 | { |
3241 | 0 | bin_tree_t *mbc_tree; |
3242 | 0 | int sbc_idx; |
3243 | | /* Build a tree for complex bracket. */ |
3244 | 0 | dfa->has_mb_node = 1; |
3245 | 0 | br_token.type = COMPLEX_BRACKET; |
3246 | 0 | br_token.opr.mbcset = mbcset; |
3247 | 0 | mbc_tree = create_token_tree (dfa, NULL, NULL, &br_token); |
3248 | 0 | if (__glibc_unlikely (mbc_tree == NULL)) |
3249 | 0 | goto parse_bracket_exp_espace; |
3250 | 0 | for (sbc_idx = 0; sbc_idx < BITSET_WORDS; ++sbc_idx) |
3251 | 0 | if (sbcset[sbc_idx]) |
3252 | 0 | break; |
3253 | | /* If there are no bits set in sbcset, there is no point |
3254 | | of having both SIMPLE_BRACKET and COMPLEX_BRACKET. */ |
3255 | 0 | if (sbc_idx < BITSET_WORDS) |
3256 | 0 | { |
3257 | | /* Build a tree for simple bracket. */ |
3258 | 0 | br_token.type = SIMPLE_BRACKET; |
3259 | 0 | br_token.opr.sbcset = sbcset; |
3260 | 0 | work_tree = create_token_tree (dfa, NULL, NULL, &br_token); |
3261 | 0 | if (__glibc_unlikely (work_tree == NULL)) |
3262 | 0 | goto parse_bracket_exp_espace; |
3263 | | |
3264 | | /* Then join them by ALT node. */ |
3265 | 0 | work_tree = create_tree (dfa, work_tree, mbc_tree, OP_ALT); |
3266 | 0 | if (__glibc_unlikely (work_tree == NULL)) |
3267 | 0 | goto parse_bracket_exp_espace; |
3268 | 0 | } |
3269 | 0 | else |
3270 | 0 | { |
3271 | 0 | re_free (sbcset); |
3272 | 0 | work_tree = mbc_tree; |
3273 | 0 | } |
3274 | 0 | } |
3275 | 17.0k | else |
3276 | 17.0k | { |
3277 | 17.0k | free_charset (mbcset); |
3278 | | /* Build a tree for simple bracket. */ |
3279 | 17.0k | br_token.type = SIMPLE_BRACKET; |
3280 | 17.0k | br_token.opr.sbcset = sbcset; |
3281 | 17.0k | work_tree = create_token_tree (dfa, NULL, NULL, &br_token); |
3282 | 17.0k | if (__glibc_unlikely (work_tree == NULL)) |
3283 | 0 | goto parse_bracket_exp_espace; |
3284 | 17.0k | } |
3285 | 17.0k | return work_tree; |
3286 | | |
3287 | 0 | parse_bracket_exp_espace: |
3288 | 0 | *err = REG_ESPACE; |
3289 | 10 | parse_bracket_exp_free_return: |
3290 | 10 | re_free (sbcset); |
3291 | 10 | free_charset (mbcset); |
3292 | 10 | return NULL; |
3293 | 0 | } |
3294 | | |
3295 | | /* Parse an element in the bracket expression. */ |
3296 | | |
3297 | | static reg_errcode_t |
3298 | | parse_bracket_element (bracket_elem_t *elem, re_string_t *regexp, |
3299 | | re_token_t *token, int token_len, re_dfa_t *dfa, |
3300 | | reg_syntax_t syntax, bool accept_hyphen) |
3301 | 62.2M | { |
3302 | 62.2M | int cur_char_size; |
3303 | 62.2M | cur_char_size = re_string_char_size_at (regexp, re_string_cur_idx (regexp)); |
3304 | 62.2M | if (cur_char_size > 1) |
3305 | 0 | { |
3306 | 0 | elem->type = MB_CHAR; |
3307 | 0 | elem->opr.wch = re_string_wchar_at (regexp, re_string_cur_idx (regexp)); |
3308 | 0 | re_string_skip_bytes (regexp, cur_char_size); |
3309 | 0 | return REG_NOERROR; |
3310 | 0 | } |
3311 | 62.2M | re_string_skip_bytes (regexp, token_len); /* Skip a token. */ |
3312 | 62.2M | if (token->type == OP_OPEN_COLL_ELEM || token->type == OP_OPEN_CHAR_CLASS |
3313 | 62.2M | || token->type == OP_OPEN_EQUIV_CLASS) |
3314 | 83 | return parse_bracket_symbol (elem, regexp, token); |
3315 | 62.2M | if (__glibc_unlikely (token->type == OP_CHARSET_RANGE) && !accept_hyphen) |
3316 | 0 | { |
3317 | | /* A '-' must only appear as anything but a range indicator before |
3318 | | the closing bracket. Everything else is an error. */ |
3319 | 0 | re_token_t token2; |
3320 | 0 | (void) peek_token_bracket (&token2, regexp, syntax); |
3321 | 0 | if (token2.type != OP_CLOSE_BRACKET) |
3322 | | /* The actual error value is not standardized since this whole |
3323 | | case is undefined. But ERANGE makes good sense. */ |
3324 | 0 | return REG_ERANGE; |
3325 | 0 | } |
3326 | 62.2M | elem->type = SB_CHAR; |
3327 | 62.2M | elem->opr.ch = token->opr.c; |
3328 | 62.2M | return REG_NOERROR; |
3329 | 62.2M | } |
3330 | | |
3331 | | /* Parse a bracket symbol in the bracket expression. Bracket symbols are |
3332 | | such as [:<character_class>:], [.<collating_element>.], and |
3333 | | [=<equivalent_class>=]. */ |
3334 | | |
3335 | | static reg_errcode_t |
3336 | | parse_bracket_symbol (bracket_elem_t *elem, re_string_t *regexp, |
3337 | | re_token_t *token) |
3338 | 83 | { |
3339 | 83 | unsigned char ch, delim = token->opr.c; |
3340 | 83 | int i = 0; |
3341 | 83 | if (re_string_eoi(regexp)) |
3342 | 0 | return REG_EBRACK; |
3343 | 83 | for (;; ++i) |
3344 | 166 | { |
3345 | 166 | if (i >= BRACKET_NAME_BUF_SIZE) |
3346 | 0 | return REG_EBRACK; |
3347 | 166 | if (token->type == OP_OPEN_CHAR_CLASS) |
3348 | 0 | ch = re_string_fetch_byte_case (regexp); |
3349 | 166 | else |
3350 | 166 | ch = re_string_fetch_byte (regexp); |
3351 | 166 | if (re_string_eoi(regexp)) |
3352 | 0 | return REG_EBRACK; |
3353 | 166 | if (ch == delim && re_string_peek_byte (regexp, 0) == ']') |
3354 | 83 | break; |
3355 | 83 | elem->opr.name[i] = ch; |
3356 | 83 | } |
3357 | 83 | re_string_skip_bytes (regexp, 1); |
3358 | 83 | elem->opr.name[i] = '\0'; |
3359 | 83 | switch (token->type) |
3360 | 83 | { |
3361 | 83 | case OP_OPEN_COLL_ELEM: |
3362 | 83 | elem->type = COLL_SYM; |
3363 | 83 | break; |
3364 | 0 | case OP_OPEN_EQUIV_CLASS: |
3365 | 0 | elem->type = EQUIV_CLASS; |
3366 | 0 | break; |
3367 | 0 | case OP_OPEN_CHAR_CLASS: |
3368 | 0 | elem->type = CHAR_CLASS; |
3369 | 0 | break; |
3370 | 0 | default: |
3371 | 0 | break; |
3372 | 83 | } |
3373 | 83 | return REG_NOERROR; |
3374 | 83 | } |
3375 | | |
3376 | | /* Helper function for parse_bracket_exp. |
3377 | | Build the equivalence class which is represented by NAME. |
3378 | | The result are written to MBCSET and SBCSET. |
3379 | | EQUIV_CLASS_ALLOC is the allocated size of mbcset->equiv_classes, |
3380 | | is a pointer argument since we may update it. */ |
3381 | | |
3382 | | static reg_errcode_t |
3383 | | build_equiv_class (bitset_t sbcset, re_charset_t *mbcset, |
3384 | | Idx *equiv_class_alloc, const unsigned char *name) |
3385 | 0 | { |
3386 | | #ifdef _LIBC |
3387 | | uint32_t nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); |
3388 | | if (nrules != 0) |
3389 | | { |
3390 | | const int32_t *table, *indirect; |
3391 | | const unsigned char *weights, *extra, *cp; |
3392 | | unsigned char char_buf[2]; |
3393 | | int32_t idx1, idx2; |
3394 | | unsigned int ch; |
3395 | | size_t len; |
3396 | | /* Calculate the index for equivalence class. */ |
3397 | | cp = name; |
3398 | | table = (const int32_t *) _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB); |
3399 | | weights = (const unsigned char *) _NL_CURRENT (LC_COLLATE, |
3400 | | _NL_COLLATE_WEIGHTMB); |
3401 | | extra = (const unsigned char *) _NL_CURRENT (LC_COLLATE, |
3402 | | _NL_COLLATE_EXTRAMB); |
3403 | | indirect = (const int32_t *) _NL_CURRENT (LC_COLLATE, |
3404 | | _NL_COLLATE_INDIRECTMB); |
3405 | | idx1 = findidx (table, indirect, extra, &cp, -1); |
3406 | | if (__glibc_unlikely (idx1 == 0 || *cp != '\0')) |
3407 | | /* This isn't a valid character. */ |
3408 | | return REG_ECOLLATE; |
3409 | | |
3410 | | /* Build single byte matching table for this equivalence class. */ |
3411 | | len = weights[idx1 & 0xffffff]; |
3412 | | for (ch = 0; ch < SBC_MAX; ++ch) |
3413 | | { |
3414 | | char_buf[0] = ch; |
3415 | | cp = char_buf; |
3416 | | idx2 = findidx (table, indirect, extra, &cp, 1); |
3417 | | /* |
3418 | | idx2 = table[ch]; |
3419 | | */ |
3420 | | if (idx2 == 0) |
3421 | | /* This isn't a valid character. */ |
3422 | | continue; |
3423 | | /* Compare only if the length matches and the collation rule |
3424 | | index is the same. */ |
3425 | | if (len == weights[idx2 & 0xffffff] && (idx1 >> 24) == (idx2 >> 24) |
3426 | | && memcmp (weights + (idx1 & 0xffffff) + 1, |
3427 | | weights + (idx2 & 0xffffff) + 1, len) == 0) |
3428 | | bitset_set (sbcset, ch); |
3429 | | } |
3430 | | /* Check whether the array has enough space. */ |
3431 | | if (__glibc_unlikely (*equiv_class_alloc == mbcset->nequiv_classes)) |
3432 | | { |
3433 | | /* Not enough, realloc it. */ |
3434 | | /* +1 in case of mbcset->nequiv_classes is 0. */ |
3435 | | Idx new_equiv_class_alloc = 2 * mbcset->nequiv_classes + 1; |
3436 | | /* Use realloc since the array is NULL if *alloc == 0. */ |
3437 | | int32_t *new_equiv_classes = re_realloc (mbcset->equiv_classes, |
3438 | | int32_t, |
3439 | | new_equiv_class_alloc); |
3440 | | if (__glibc_unlikely (new_equiv_classes == NULL)) |
3441 | | return REG_ESPACE; |
3442 | | mbcset->equiv_classes = new_equiv_classes; |
3443 | | *equiv_class_alloc = new_equiv_class_alloc; |
3444 | | } |
3445 | | mbcset->equiv_classes[mbcset->nequiv_classes++] = idx1; |
3446 | | } |
3447 | | else |
3448 | | #endif /* _LIBC */ |
3449 | 0 | { |
3450 | 0 | if (__glibc_unlikely (strlen ((const char *) name) != 1)) |
3451 | 0 | return REG_ECOLLATE; |
3452 | 0 | bitset_set (sbcset, *name); |
3453 | 0 | } |
3454 | 0 | return REG_NOERROR; |
3455 | 0 | } |
3456 | | |
3457 | | /* Helper function for parse_bracket_exp. |
3458 | | Build the character class which is represented by NAME. |
3459 | | The result are written to MBCSET and SBCSET. |
3460 | | CHAR_CLASS_ALLOC is the allocated size of mbcset->char_classes, |
3461 | | is a pointer argument since we may update it. */ |
3462 | | |
3463 | | static reg_errcode_t |
3464 | | build_charclass (RE_TRANSLATE_TYPE trans, bitset_t sbcset, |
3465 | | re_charset_t *mbcset, Idx *char_class_alloc, |
3466 | | const char *class_name, reg_syntax_t syntax) |
3467 | 0 | { |
3468 | 0 | int i; |
3469 | 0 | const char *name = class_name; |
3470 | | |
3471 | | /* In case of REG_ICASE "upper" and "lower" match the both of |
3472 | | upper and lower cases. */ |
3473 | 0 | if ((syntax & RE_ICASE) |
3474 | 0 | && (strcmp (name, "upper") == 0 || strcmp (name, "lower") == 0)) |
3475 | 0 | name = "alpha"; |
3476 | | |
3477 | | /* Check the space of the arrays. */ |
3478 | 0 | if (__glibc_unlikely (*char_class_alloc == mbcset->nchar_classes)) |
3479 | 0 | { |
3480 | | /* Not enough, realloc it. */ |
3481 | | /* +1 in case of mbcset->nchar_classes is 0. */ |
3482 | 0 | Idx new_char_class_alloc = 2 * mbcset->nchar_classes + 1; |
3483 | | /* Use realloc since array is NULL if *alloc == 0. */ |
3484 | 0 | wctype_t *new_char_classes = re_realloc (mbcset->char_classes, wctype_t, |
3485 | 0 | new_char_class_alloc); |
3486 | 0 | if (__glibc_unlikely (new_char_classes == NULL)) |
3487 | 0 | return REG_ESPACE; |
3488 | 0 | mbcset->char_classes = new_char_classes; |
3489 | 0 | *char_class_alloc = new_char_class_alloc; |
3490 | 0 | } |
3491 | 0 | mbcset->char_classes[mbcset->nchar_classes++] = __wctype (name); |
3492 | |
|
3493 | 0 | #define BUILD_CHARCLASS_LOOP(ctype_func) \ |
3494 | 0 | do { \ |
3495 | 0 | if (__glibc_unlikely (trans != NULL)) \ |
3496 | 0 | { \ |
3497 | 0 | for (i = 0; i < SBC_MAX; ++i) \ |
3498 | 0 | if (ctype_func (i)) \ |
3499 | 0 | bitset_set (sbcset, trans[i]); \ |
3500 | 0 | } \ |
3501 | 0 | else \ |
3502 | 0 | { \ |
3503 | 0 | for (i = 0; i < SBC_MAX; ++i) \ |
3504 | 0 | if (ctype_func (i)) \ |
3505 | 0 | bitset_set (sbcset, i); \ |
3506 | 0 | } \ |
3507 | 0 | } while (0) |
3508 | |
|
3509 | 0 | if (strcmp (name, "alnum") == 0) |
3510 | 0 | BUILD_CHARCLASS_LOOP (isalnum); |
3511 | 0 | else if (strcmp (name, "cntrl") == 0) |
3512 | 0 | BUILD_CHARCLASS_LOOP (iscntrl); |
3513 | 0 | else if (strcmp (name, "lower") == 0) |
3514 | 0 | BUILD_CHARCLASS_LOOP (islower); |
3515 | 0 | else if (strcmp (name, "space") == 0) |
3516 | 0 | BUILD_CHARCLASS_LOOP (isspace); |
3517 | 0 | else if (strcmp (name, "alpha") == 0) |
3518 | 0 | BUILD_CHARCLASS_LOOP (isalpha); |
3519 | 0 | else if (strcmp (name, "digit") == 0) |
3520 | 0 | BUILD_CHARCLASS_LOOP (isdigit); |
3521 | 0 | else if (strcmp (name, "print") == 0) |
3522 | 0 | BUILD_CHARCLASS_LOOP (isprint); |
3523 | 0 | else if (strcmp (name, "upper") == 0) |
3524 | 0 | BUILD_CHARCLASS_LOOP (isupper); |
3525 | 0 | else if (strcmp (name, "blank") == 0) |
3526 | 0 | BUILD_CHARCLASS_LOOP (isblank); |
3527 | 0 | else if (strcmp (name, "graph") == 0) |
3528 | 0 | BUILD_CHARCLASS_LOOP (isgraph); |
3529 | 0 | else if (strcmp (name, "punct") == 0) |
3530 | 0 | BUILD_CHARCLASS_LOOP (ispunct); |
3531 | 0 | else if (strcmp (name, "xdigit") == 0) |
3532 | 0 | BUILD_CHARCLASS_LOOP (isxdigit); |
3533 | 0 | else |
3534 | 0 | return REG_ECTYPE; |
3535 | | |
3536 | 0 | return REG_NOERROR; |
3537 | 0 | } |
3538 | | |
3539 | | static bin_tree_t * |
3540 | | build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans, |
3541 | | const char *class_name, |
3542 | | const char *extra, bool non_match, |
3543 | | reg_errcode_t *err) |
3544 | 0 | { |
3545 | 0 | re_bitset_ptr_t sbcset; |
3546 | 0 | re_charset_t *mbcset; |
3547 | 0 | Idx alloc = 0; |
3548 | 0 | reg_errcode_t ret; |
3549 | 0 | bin_tree_t *tree; |
3550 | |
|
3551 | 0 | sbcset = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1); |
3552 | 0 | if (__glibc_unlikely (sbcset == NULL)) |
3553 | 0 | { |
3554 | 0 | *err = REG_ESPACE; |
3555 | 0 | return NULL; |
3556 | 0 | } |
3557 | 0 | mbcset = (re_charset_t *) calloc (sizeof (re_charset_t), 1); |
3558 | 0 | if (__glibc_unlikely (mbcset == NULL)) |
3559 | 0 | { |
3560 | 0 | re_free (sbcset); |
3561 | 0 | *err = REG_ESPACE; |
3562 | 0 | return NULL; |
3563 | 0 | } |
3564 | 0 | mbcset->non_match = non_match; |
3565 | | |
3566 | | /* We don't care the syntax in this case. */ |
3567 | 0 | ret = build_charclass (trans, sbcset, mbcset, &alloc, class_name, 0); |
3568 | |
|
3569 | 0 | if (__glibc_unlikely (ret != REG_NOERROR)) |
3570 | 0 | { |
3571 | 0 | re_free (sbcset); |
3572 | 0 | free_charset (mbcset); |
3573 | 0 | *err = ret; |
3574 | 0 | return NULL; |
3575 | 0 | } |
3576 | | /* \w match '_' also. */ |
3577 | 0 | for (; *extra; extra++) |
3578 | 0 | bitset_set (sbcset, *extra); |
3579 | | |
3580 | | /* If it is non-matching list. */ |
3581 | 0 | if (non_match) |
3582 | 0 | bitset_not (sbcset); |
3583 | | |
3584 | | /* Ensure only single byte characters are set. */ |
3585 | 0 | if (dfa->mb_cur_max > 1) |
3586 | 0 | bitset_mask (sbcset, dfa->sb_char); |
3587 | | |
3588 | | /* Build a tree for simple bracket. */ |
3589 | 0 | re_token_t br_token = { .type = SIMPLE_BRACKET, .opr.sbcset = sbcset }; |
3590 | 0 | tree = create_token_tree (dfa, NULL, NULL, &br_token); |
3591 | 0 | if (__glibc_unlikely (tree == NULL)) |
3592 | 0 | goto build_word_op_espace; |
3593 | | |
3594 | 0 | if (dfa->mb_cur_max > 1) |
3595 | 0 | { |
3596 | 0 | bin_tree_t *mbc_tree; |
3597 | | /* Build a tree for complex bracket. */ |
3598 | 0 | br_token.type = COMPLEX_BRACKET; |
3599 | 0 | br_token.opr.mbcset = mbcset; |
3600 | 0 | dfa->has_mb_node = 1; |
3601 | 0 | mbc_tree = create_token_tree (dfa, NULL, NULL, &br_token); |
3602 | 0 | if (__glibc_unlikely (mbc_tree == NULL)) |
3603 | 0 | goto build_word_op_espace; |
3604 | | /* Then join them by ALT node. */ |
3605 | 0 | tree = create_tree (dfa, tree, mbc_tree, OP_ALT); |
3606 | 0 | if (__glibc_likely (mbc_tree != NULL)) |
3607 | 0 | return tree; |
3608 | 0 | } |
3609 | 0 | else |
3610 | 0 | { |
3611 | 0 | free_charset (mbcset); |
3612 | 0 | return tree; |
3613 | 0 | } |
3614 | | |
3615 | 0 | build_word_op_espace: |
3616 | 0 | re_free (sbcset); |
3617 | 0 | free_charset (mbcset); |
3618 | 0 | *err = REG_ESPACE; |
3619 | 0 | return NULL; |
3620 | 0 | } |
3621 | | |
3622 | | /* This is intended for the expressions like "a{1,3}". |
3623 | | Fetch a number from 'input', and return the number. |
3624 | | Return -1 if the number field is empty like "{,1}". |
3625 | | Return RE_DUP_MAX + 1 if the number field is too large. |
3626 | | Return -2 if an error occurred. */ |
3627 | | |
3628 | | static Idx |
3629 | | fetch_number (re_string_t *input, re_token_t *token, reg_syntax_t syntax) |
3630 | 0 | { |
3631 | 0 | Idx num = -1; |
3632 | 0 | unsigned char c; |
3633 | 0 | while (1) |
3634 | 0 | { |
3635 | 0 | fetch_token (token, input, syntax); |
3636 | 0 | c = token->opr.c; |
3637 | 0 | if (__glibc_unlikely (token->type == END_OF_RE)) |
3638 | 0 | return -2; |
3639 | 0 | if (token->type == OP_CLOSE_DUP_NUM || c == ',') |
3640 | 0 | break; |
3641 | 0 | num = ((token->type != CHARACTER || c < '0' || '9' < c || num == -2) |
3642 | 0 | ? -2 |
3643 | 0 | : num == -1 |
3644 | 0 | ? c - '0' |
3645 | 0 | : MIN (RE_DUP_MAX + 1, num * 10 + c - '0')); |
3646 | 0 | } |
3647 | 0 | return num; |
3648 | 0 | } |
3649 | | |
3650 | | static void |
3651 | | free_charset (re_charset_t *cset) |
3652 | 17.0k | { |
3653 | 17.0k | re_free (cset->mbchars); |
3654 | | #ifdef _LIBC |
3655 | | re_free (cset->coll_syms); |
3656 | | re_free (cset->equiv_classes); |
3657 | | #endif |
3658 | 17.0k | re_free (cset->range_starts); |
3659 | 17.0k | re_free (cset->range_ends); |
3660 | 17.0k | re_free (cset->char_classes); |
3661 | 17.0k | re_free (cset); |
3662 | 17.0k | } |
3663 | | |
3664 | | /* Functions for binary tree operation. */ |
3665 | | |
3666 | | /* Create a tree node. */ |
3667 | | |
3668 | | static bin_tree_t * |
3669 | | create_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right, |
3670 | | re_token_type_t type) |
3671 | 7.44M | { |
3672 | 7.44M | re_token_t t = { .type = type }; |
3673 | 7.44M | return create_token_tree (dfa, left, right, &t); |
3674 | 7.44M | } |
3675 | | |
3676 | | static bin_tree_t * |
3677 | | create_token_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right, |
3678 | | const re_token_t *token) |
3679 | 16.0M | { |
3680 | 16.0M | bin_tree_t *tree; |
3681 | 16.0M | if (__glibc_unlikely (dfa->str_tree_storage_idx == BIN_TREE_STORAGE_SIZE)) |
3682 | 1.07M | { |
3683 | 1.07M | bin_tree_storage_t *storage = re_malloc (bin_tree_storage_t, 1); |
3684 | | |
3685 | 1.07M | if (storage == NULL) |
3686 | 0 | return NULL; |
3687 | 1.07M | storage->next = dfa->str_tree_storage; |
3688 | 1.07M | dfa->str_tree_storage = storage; |
3689 | 1.07M | dfa->str_tree_storage_idx = 0; |
3690 | 1.07M | } |
3691 | 16.0M | tree = &dfa->str_tree_storage->data[dfa->str_tree_storage_idx++]; |
3692 | | |
3693 | 16.0M | tree->parent = NULL; |
3694 | 16.0M | tree->left = left; |
3695 | 16.0M | tree->right = right; |
3696 | 16.0M | tree->token = *token; |
3697 | 16.0M | tree->token.duplicated = 0; |
3698 | 16.0M | tree->token.opt_subexp = 0; |
3699 | 16.0M | tree->first = NULL; |
3700 | 16.0M | tree->next = NULL; |
3701 | 16.0M | tree->node_idx = -1; |
3702 | | |
3703 | 16.0M | if (left != NULL) |
3704 | 7.14M | left->parent = tree; |
3705 | 16.0M | if (right != NULL) |
3706 | 6.57M | right->parent = tree; |
3707 | 16.0M | return tree; |
3708 | 16.0M | } |
3709 | | |
3710 | | /* Mark the tree SRC as an optional subexpression. |
3711 | | To be called from preorder or postorder. */ |
3712 | | |
3713 | | static reg_errcode_t |
3714 | | mark_opt_subexp (void *extra, bin_tree_t *node) |
3715 | 2.34M | { |
3716 | 2.34M | Idx idx = (uintptr_t) extra; |
3717 | 2.34M | if (node->token.type == SUBEXP && node->token.opr.idx == idx) |
3718 | 79 | node->token.opt_subexp = 1; |
3719 | | |
3720 | 2.34M | return REG_NOERROR; |
3721 | 2.34M | } |
3722 | | |
3723 | | /* Free the allocated memory inside NODE. */ |
3724 | | |
3725 | | static void |
3726 | | free_token (re_token_t *node) |
3727 | 11.0M | { |
3728 | 11.0M | if (node->type == COMPLEX_BRACKET && node->duplicated == 0) |
3729 | 0 | free_charset (node->opr.mbcset); |
3730 | 11.0M | else if (node->type == SIMPLE_BRACKET && node->duplicated == 0) |
3731 | 11.0M | re_free (node->opr.sbcset); |
3732 | 11.0M | } |
3733 | | |
3734 | | /* Worker function for tree walking. Free the allocated memory inside NODE |
3735 | | and its children. */ |
3736 | | |
3737 | | static reg_errcode_t |
3738 | | free_tree (void *extra, bin_tree_t *node) |
3739 | 6.05M | { |
3740 | 6.05M | free_token (&node->token); |
3741 | 6.05M | return REG_NOERROR; |
3742 | 6.05M | } |
3743 | | |
3744 | | |
3745 | | /* Duplicate the node SRC, and return new node. This is a preorder |
3746 | | visit similar to the one implemented by the generic visitor, but |
3747 | | we need more infrastructure to maintain two parallel trees --- so, |
3748 | | it's easier to duplicate. */ |
3749 | | |
3750 | | static bin_tree_t * |
3751 | | duplicate_tree (const bin_tree_t *root, re_dfa_t *dfa) |
3752 | 2.73k | { |
3753 | 2.73k | const bin_tree_t *node; |
3754 | 2.73k | bin_tree_t *dup_root; |
3755 | 2.73k | bin_tree_t **p_new = &dup_root, *dup_node = root->parent; |
3756 | | |
3757 | 2.73k | for (node = root; ; ) |
3758 | 2.26M | { |
3759 | | /* Create a new tree and link it back to the current parent. */ |
3760 | 2.26M | *p_new = create_token_tree (dfa, NULL, NULL, &node->token); |
3761 | 2.26M | if (*p_new == NULL) |
3762 | 0 | return NULL; |
3763 | 2.26M | (*p_new)->parent = dup_node; |
3764 | 2.26M | (*p_new)->token.duplicated = 1; |
3765 | 2.26M | dup_node = *p_new; |
3766 | | |
3767 | | /* Go to the left node, or up and to the right. */ |
3768 | 2.26M | if (node->left) |
3769 | 1.39M | { |
3770 | 1.39M | node = node->left; |
3771 | 1.39M | p_new = &dup_node->left; |
3772 | 1.39M | } |
3773 | 877k | else |
3774 | 877k | { |
3775 | 877k | const bin_tree_t *prev = NULL; |
3776 | 3.14M | while (node->right == prev || node->right == NULL) |
3777 | 2.26M | { |
3778 | 2.26M | prev = node; |
3779 | 2.26M | node = node->parent; |
3780 | 2.26M | dup_node = dup_node->parent; |
3781 | 2.26M | if (!node) |
3782 | 2.73k | return dup_root; |
3783 | 2.26M | } |
3784 | 874k | node = node->right; |
3785 | 874k | p_new = &dup_node->right; |
3786 | 874k | } |
3787 | 2.26M | } |
3788 | 2.73k | } |