Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | /* regcomp.c |
2 | */ | |
3 | ||
4 | /* | |
5 | * "A fair jaw-cracker dwarf-language must be." --Samwise Gamgee | |
6 | */ | |
7 | ||
61296642 DM |
8 | /* This file contains functions for compiling a regular expression. See |
9 | * also regexec.c which funnily enough, contains functions for executing | |
166f8a29 | 10 | * a regular expression. |
e4a054ea DM |
11 | * |
12 | * This file is also copied at build time to ext/re/re_comp.c, where | |
13 | * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT. | |
14 | * This causes the main functions to be compiled under new names and with | |
15 | * debugging support added, which makes "use re 'debug'" work. | |
166f8a29 DM |
16 | */ |
17 | ||
a687059c LW |
18 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
19 | * confused with the original package (see point 3 below). Thanks, Henry! | |
20 | */ | |
21 | ||
22 | /* Additional note: this code is very heavily munged from Henry's version | |
23 | * in places. In some spots I've traded clarity for efficiency, so don't | |
24 | * blame Henry for some of the lack of readability. | |
25 | */ | |
26 | ||
e50aee73 AD |
27 | /* The names of the functions have been changed from regcomp and |
28 | * regexec to pregcomp and pregexec in order to avoid conflicts | |
29 | * with the POSIX routines of the same names. | |
30 | */ | |
31 | ||
b9d5759e | 32 | #ifdef PERL_EXT_RE_BUILD |
54df2634 | 33 | #include "re_top.h" |
b81d288d | 34 | #endif |
56953603 | 35 | |
a687059c | 36 | /* |
e50aee73 | 37 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
38 | * |
39 | * Copyright (c) 1986 by University of Toronto. | |
40 | * Written by Henry Spencer. Not derived from licensed software. | |
41 | * | |
42 | * Permission is granted to anyone to use this software for any | |
43 | * purpose on any computer system, and to redistribute it freely, | |
44 | * subject to the following restrictions: | |
45 | * | |
46 | * 1. The author is not responsible for the consequences of use of | |
47 | * this software, no matter how awful, even if they arise | |
48 | * from defects in it. | |
49 | * | |
50 | * 2. The origin of this software must not be misrepresented, either | |
51 | * by explicit claim or by omission. | |
52 | * | |
53 | * 3. Altered versions must be plainly marked as such, and must not | |
54 | * be misrepresented as being the original software. | |
55 | * | |
56 | * | |
57 | **** Alterations to Henry's code are... | |
58 | **** | |
4bb101f2 | 59 | **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
b94e2f88 | 60 | **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others |
a687059c | 61 | **** |
9ef589d8 LW |
62 | **** You may distribute under the terms of either the GNU General Public |
63 | **** License or the Artistic License, as specified in the README file. | |
64 | ||
a687059c LW |
65 | * |
66 | * Beware that some of this code is subtly aware of the way operator | |
67 | * precedence is structured in regular expressions. Serious changes in | |
68 | * regular-expression syntax might require a total rethink. | |
69 | */ | |
70 | #include "EXTERN.h" | |
864dbfa3 | 71 | #define PERL_IN_REGCOMP_C |
a687059c | 72 | #include "perl.h" |
d06ea78c | 73 | |
acfe0abc | 74 | #ifndef PERL_IN_XSUB_RE |
d06ea78c GS |
75 | # include "INTERN.h" |
76 | #endif | |
c277df42 IZ |
77 | |
78 | #define REG_COMP_C | |
54df2634 NC |
79 | #ifdef PERL_IN_XSUB_RE |
80 | # include "re_comp.h" | |
81 | #else | |
82 | # include "regcomp.h" | |
83 | #endif | |
a687059c | 84 | |
d4cce5f1 | 85 | #ifdef op |
11343788 | 86 | #undef op |
d4cce5f1 | 87 | #endif /* op */ |
11343788 | 88 | |
fe14fcc3 | 89 | #ifdef MSDOS |
7e4e8c89 | 90 | # if defined(BUGGY_MSC6) |
fe14fcc3 | 91 | /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */ |
7e4e8c89 | 92 | # pragma optimize("a",off) |
fe14fcc3 | 93 | /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/ |
7e4e8c89 NC |
94 | # pragma optimize("w",on ) |
95 | # endif /* BUGGY_MSC6 */ | |
fe14fcc3 LW |
96 | #endif /* MSDOS */ |
97 | ||
a687059c LW |
98 | #ifndef STATIC |
99 | #define STATIC static | |
100 | #endif | |
101 | ||
830247a4 | 102 | typedef struct RExC_state_t { |
e2509266 | 103 | U32 flags; /* are we folding, multilining? */ |
830247a4 IZ |
104 | char *precomp; /* uncompiled string. */ |
105 | regexp *rx; | |
fac92740 | 106 | char *start; /* Start of input for compile */ |
830247a4 IZ |
107 | char *end; /* End of input for compile */ |
108 | char *parse; /* Input-scan pointer. */ | |
109 | I32 whilem_seen; /* number of WHILEM in this expr */ | |
fac92740 | 110 | regnode *emit_start; /* Start of emitted-code area */ |
ffc61ed2 | 111 | regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */ |
830247a4 IZ |
112 | I32 naughty; /* How bad is this pattern? */ |
113 | I32 sawback; /* Did we see \1, ...? */ | |
114 | U32 seen; | |
115 | I32 size; /* Code size. */ | |
116 | I32 npar; /* () count. */ | |
117 | I32 extralen; | |
118 | I32 seen_zerolen; | |
119 | I32 seen_evals; | |
1aa99e6b | 120 | I32 utf8; |
830247a4 IZ |
121 | #if ADD_TO_REGEXEC |
122 | char *starttry; /* -Dr: where regtry was called. */ | |
123 | #define RExC_starttry (pRExC_state->starttry) | |
124 | #endif | |
3dab1dad | 125 | #ifdef DEBUGGING |
be8e71aa | 126 | const char *lastparse; |
3dab1dad YO |
127 | I32 lastnum; |
128 | #define RExC_lastparse (pRExC_state->lastparse) | |
129 | #define RExC_lastnum (pRExC_state->lastnum) | |
130 | #endif | |
830247a4 IZ |
131 | } RExC_state_t; |
132 | ||
e2509266 | 133 | #define RExC_flags (pRExC_state->flags) |
830247a4 IZ |
134 | #define RExC_precomp (pRExC_state->precomp) |
135 | #define RExC_rx (pRExC_state->rx) | |
fac92740 | 136 | #define RExC_start (pRExC_state->start) |
830247a4 IZ |
137 | #define RExC_end (pRExC_state->end) |
138 | #define RExC_parse (pRExC_state->parse) | |
139 | #define RExC_whilem_seen (pRExC_state->whilem_seen) | |
fac92740 | 140 | #define RExC_offsets (pRExC_state->rx->offsets) /* I am not like the others */ |
830247a4 | 141 | #define RExC_emit (pRExC_state->emit) |
fac92740 | 142 | #define RExC_emit_start (pRExC_state->emit_start) |
830247a4 IZ |
143 | #define RExC_naughty (pRExC_state->naughty) |
144 | #define RExC_sawback (pRExC_state->sawback) | |
145 | #define RExC_seen (pRExC_state->seen) | |
146 | #define RExC_size (pRExC_state->size) | |
147 | #define RExC_npar (pRExC_state->npar) | |
148 | #define RExC_extralen (pRExC_state->extralen) | |
149 | #define RExC_seen_zerolen (pRExC_state->seen_zerolen) | |
150 | #define RExC_seen_evals (pRExC_state->seen_evals) | |
1aa99e6b | 151 | #define RExC_utf8 (pRExC_state->utf8) |
830247a4 | 152 | |
a687059c LW |
153 | #define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?') |
154 | #define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \ | |
155 | ((*s) == '{' && regcurly(s))) | |
a687059c | 156 | |
35c8bce7 LW |
157 | #ifdef SPSTART |
158 | #undef SPSTART /* dratted cpp namespace... */ | |
159 | #endif | |
a687059c LW |
160 | /* |
161 | * Flags to be passed up and down. | |
162 | */ | |
a687059c | 163 | #define WORST 0 /* Worst case. */ |
821b33a5 | 164 | #define HASWIDTH 0x1 /* Known to match non-null strings. */ |
a0d0e21e LW |
165 | #define SIMPLE 0x2 /* Simple enough to be STAR/PLUS operand. */ |
166 | #define SPSTART 0x4 /* Starts with * or +. */ | |
167 | #define TRYAGAIN 0x8 /* Weeded out a declaration. */ | |
a687059c | 168 | |
3dab1dad YO |
169 | #define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1) |
170 | ||
07be1b83 YO |
171 | /* whether trie related optimizations are enabled */ |
172 | #if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION | |
173 | #define TRIE_STUDY_OPT | |
174 | #define TRIE_STCLASS | |
175 | #endif | |
2c2d71f5 JH |
176 | /* Length of a variant. */ |
177 | ||
178 | typedef struct scan_data_t { | |
179 | I32 len_min; | |
180 | I32 len_delta; | |
181 | I32 pos_min; | |
182 | I32 pos_delta; | |
183 | SV *last_found; | |
184 | I32 last_end; /* min value, <0 unless valid. */ | |
185 | I32 last_start_min; | |
186 | I32 last_start_max; | |
187 | SV **longest; /* Either &l_fixed, or &l_float. */ | |
188 | SV *longest_fixed; | |
189 | I32 offset_fixed; | |
190 | SV *longest_float; | |
191 | I32 offset_float_min; | |
192 | I32 offset_float_max; | |
193 | I32 flags; | |
194 | I32 whilem_c; | |
cb434fcc | 195 | I32 *last_closep; |
653099ff | 196 | struct regnode_charclass_class *start_class; |
2c2d71f5 JH |
197 | } scan_data_t; |
198 | ||
a687059c | 199 | /* |
e50aee73 | 200 | * Forward declarations for pregcomp()'s friends. |
a687059c | 201 | */ |
a0d0e21e | 202 | |
27da23d5 JH |
203 | static const scan_data_t zero_scan_data = |
204 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; | |
c277df42 IZ |
205 | |
206 | #define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL) | |
07be1b83 YO |
207 | #define SF_BEFORE_SEOL 0x0001 |
208 | #define SF_BEFORE_MEOL 0x0002 | |
c277df42 IZ |
209 | #define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL) |
210 | #define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL) | |
211 | ||
09b7f37c CB |
212 | #ifdef NO_UNARY_PLUS |
213 | # define SF_FIX_SHIFT_EOL (0+2) | |
214 | # define SF_FL_SHIFT_EOL (0+4) | |
215 | #else | |
216 | # define SF_FIX_SHIFT_EOL (+2) | |
217 | # define SF_FL_SHIFT_EOL (+4) | |
218 | #endif | |
c277df42 IZ |
219 | |
220 | #define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL) | |
221 | #define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL) | |
222 | ||
223 | #define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL) | |
224 | #define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */ | |
07be1b83 YO |
225 | #define SF_IS_INF 0x0040 |
226 | #define SF_HAS_PAR 0x0080 | |
227 | #define SF_IN_PAR 0x0100 | |
228 | #define SF_HAS_EVAL 0x0200 | |
229 | #define SCF_DO_SUBSTR 0x0400 | |
653099ff GS |
230 | #define SCF_DO_STCLASS_AND 0x0800 |
231 | #define SCF_DO_STCLASS_OR 0x1000 | |
232 | #define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR) | |
e1901655 | 233 | #define SCF_WHILEM_VISITED_POS 0x2000 |
c277df42 | 234 | |
07be1b83 YO |
235 | #define SCF_EXACT_TRIE 0x4000 /* should re study once we are done? */ |
236 | ||
eb160463 | 237 | #define UTF (RExC_utf8 != 0) |
e2509266 JH |
238 | #define LOC ((RExC_flags & PMf_LOCALE) != 0) |
239 | #define FOLD ((RExC_flags & PMf_FOLD) != 0) | |
a0ed51b3 | 240 | |
ffc61ed2 | 241 | #define OOB_UNICODE 12345678 |
93733859 | 242 | #define OOB_NAMEDCLASS -1 |
b8c5462f | 243 | |
a0ed51b3 LW |
244 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) |
245 | #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b) | |
246 | ||
8615cb43 | 247 | |
b45f050a JF |
248 | /* length of regex to show in messages that don't mark a position within */ |
249 | #define RegexLengthToShowInErrorMessages 127 | |
250 | ||
251 | /* | |
252 | * If MARKER[12] are adjusted, be sure to adjust the constants at the top | |
253 | * of t/op/regmesg.t, the tests in t/op/re_tests, and those in | |
254 | * op/pragma/warn/regcomp. | |
255 | */ | |
7253e4e3 RK |
256 | #define MARKER1 "<-- HERE" /* marker as it appears in the description */ |
257 | #define MARKER2 " <-- HERE " /* marker as it appears within the regex */ | |
b81d288d | 258 | |
7253e4e3 | 259 | #define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/" |
b45f050a JF |
260 | |
261 | /* | |
262 | * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given | |
263 | * arg. Show regex, up to a maximum length. If it's too long, chop and add | |
264 | * "...". | |
265 | */ | |
ccb2c380 | 266 | #define FAIL(msg) STMT_START { \ |
bfed75c6 | 267 | const char *ellipses = ""; \ |
ccb2c380 MP |
268 | IV len = RExC_end - RExC_precomp; \ |
269 | \ | |
270 | if (!SIZE_ONLY) \ | |
271 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
272 | if (len > RegexLengthToShowInErrorMessages) { \ | |
273 | /* chop 10 shorter than the max, to ensure meaning of "..." */ \ | |
274 | len = RegexLengthToShowInErrorMessages - 10; \ | |
275 | ellipses = "..."; \ | |
276 | } \ | |
277 | Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \ | |
278 | msg, (int)len, RExC_precomp, ellipses); \ | |
279 | } STMT_END | |
8615cb43 | 280 | |
b45f050a | 281 | /* |
b45f050a JF |
282 | * Simple_vFAIL -- like FAIL, but marks the current location in the scan |
283 | */ | |
ccb2c380 | 284 | #define Simple_vFAIL(m) STMT_START { \ |
a28509cc | 285 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
286 | Perl_croak(aTHX_ "%s" REPORT_LOCATION, \ |
287 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
288 | } STMT_END | |
b45f050a JF |
289 | |
290 | /* | |
291 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL() | |
292 | */ | |
ccb2c380 MP |
293 | #define vFAIL(m) STMT_START { \ |
294 | if (!SIZE_ONLY) \ | |
295 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
296 | Simple_vFAIL(m); \ | |
297 | } STMT_END | |
b45f050a JF |
298 | |
299 | /* | |
300 | * Like Simple_vFAIL(), but accepts two arguments. | |
301 | */ | |
ccb2c380 | 302 | #define Simple_vFAIL2(m,a1) STMT_START { \ |
a28509cc | 303 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
304 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \ |
305 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
306 | } STMT_END | |
b45f050a JF |
307 | |
308 | /* | |
309 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2(). | |
310 | */ | |
ccb2c380 MP |
311 | #define vFAIL2(m,a1) STMT_START { \ |
312 | if (!SIZE_ONLY) \ | |
313 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
314 | Simple_vFAIL2(m, a1); \ | |
315 | } STMT_END | |
b45f050a JF |
316 | |
317 | ||
318 | /* | |
319 | * Like Simple_vFAIL(), but accepts three arguments. | |
320 | */ | |
ccb2c380 | 321 | #define Simple_vFAIL3(m, a1, a2) STMT_START { \ |
a28509cc | 322 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
323 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \ |
324 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
325 | } STMT_END | |
b45f050a JF |
326 | |
327 | /* | |
328 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3(). | |
329 | */ | |
ccb2c380 MP |
330 | #define vFAIL3(m,a1,a2) STMT_START { \ |
331 | if (!SIZE_ONLY) \ | |
332 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
333 | Simple_vFAIL3(m, a1, a2); \ | |
334 | } STMT_END | |
b45f050a JF |
335 | |
336 | /* | |
337 | * Like Simple_vFAIL(), but accepts four arguments. | |
338 | */ | |
ccb2c380 | 339 | #define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \ |
a28509cc | 340 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
341 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \ |
342 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
343 | } STMT_END | |
b45f050a | 344 | |
ccb2c380 | 345 | #define vWARN(loc,m) STMT_START { \ |
a28509cc | 346 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
347 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s" REPORT_LOCATION, \ |
348 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
349 | } STMT_END | |
350 | ||
351 | #define vWARNdep(loc,m) STMT_START { \ | |
a28509cc | 352 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
353 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \ |
354 | "%s" REPORT_LOCATION, \ | |
355 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
356 | } STMT_END | |
357 | ||
358 | ||
359 | #define vWARN2(loc, m, a1) STMT_START { \ | |
a28509cc | 360 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
361 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
362 | a1, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
363 | } STMT_END | |
364 | ||
365 | #define vWARN3(loc, m, a1, a2) STMT_START { \ | |
a28509cc | 366 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
367 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
368 | a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
369 | } STMT_END | |
370 | ||
371 | #define vWARN4(loc, m, a1, a2, a3) STMT_START { \ | |
a28509cc | 372 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
373 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
374 | a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
375 | } STMT_END | |
376 | ||
377 | #define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \ | |
a28509cc | 378 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
379 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
380 | a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
381 | } STMT_END | |
9d1d55b5 | 382 | |
8615cb43 | 383 | |
cd439c50 | 384 | /* Allow for side effects in s */ |
ccb2c380 MP |
385 | #define REGC(c,s) STMT_START { \ |
386 | if (!SIZE_ONLY) *(s) = (c); else (void)(s); \ | |
387 | } STMT_END | |
cd439c50 | 388 | |
fac92740 MJD |
389 | /* Macros for recording node offsets. 20001227 mjd@plover.com |
390 | * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in | |
391 | * element 2*n-1 of the array. Element #2n holds the byte length node #n. | |
392 | * Element 0 holds the number n. | |
07be1b83 | 393 | * Position is 1 indexed. |
fac92740 MJD |
394 | */ |
395 | ||
ccb2c380 MP |
396 | #define Set_Node_Offset_To_R(node,byte) STMT_START { \ |
397 | if (! SIZE_ONLY) { \ | |
398 | MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \ | |
07be1b83 | 399 | __LINE__, (node), (int)(byte))); \ |
ccb2c380 | 400 | if((node) < 0) { \ |
551405c4 | 401 | Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \ |
ccb2c380 MP |
402 | } else { \ |
403 | RExC_offsets[2*(node)-1] = (byte); \ | |
404 | } \ | |
405 | } \ | |
406 | } STMT_END | |
407 | ||
408 | #define Set_Node_Offset(node,byte) \ | |
409 | Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start) | |
410 | #define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse) | |
411 | ||
412 | #define Set_Node_Length_To_R(node,len) STMT_START { \ | |
413 | if (! SIZE_ONLY) { \ | |
414 | MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \ | |
551405c4 | 415 | __LINE__, (int)(node), (int)(len))); \ |
ccb2c380 | 416 | if((node) < 0) { \ |
551405c4 | 417 | Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \ |
ccb2c380 MP |
418 | } else { \ |
419 | RExC_offsets[2*(node)] = (len); \ | |
420 | } \ | |
421 | } \ | |
422 | } STMT_END | |
423 | ||
424 | #define Set_Node_Length(node,len) \ | |
425 | Set_Node_Length_To_R((node)-RExC_emit_start, len) | |
426 | #define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len) | |
427 | #define Set_Node_Cur_Length(node) \ | |
428 | Set_Node_Length(node, RExC_parse - parse_start) | |
fac92740 MJD |
429 | |
430 | /* Get offsets and lengths */ | |
431 | #define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1]) | |
432 | #define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)]) | |
433 | ||
07be1b83 YO |
434 | #define Set_Node_Offset_Length(node,offset,len) STMT_START { \ |
435 | Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \ | |
436 | Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \ | |
437 | } STMT_END | |
438 | ||
439 | ||
440 | #if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS | |
441 | #define EXPERIMENTAL_INPLACESCAN | |
442 | #endif | |
443 | ||
acfe0abc | 444 | static void clear_re(pTHX_ void *r); |
4327152a | 445 | |
653099ff GS |
446 | /* Mark that we cannot extend a found fixed substring at this point. |
447 | Updata the longest found anchored substring and the longest found | |
448 | floating substrings if needed. */ | |
449 | ||
4327152a | 450 | STATIC void |
097eb12c | 451 | S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data) |
c277df42 | 452 | { |
e1ec3a88 AL |
453 | const STRLEN l = CHR_SVLEN(data->last_found); |
454 | const STRLEN old_l = CHR_SVLEN(*data->longest); | |
b81d288d | 455 | |
c277df42 | 456 | if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) { |
6b43b216 | 457 | SvSetMagicSV(*data->longest, data->last_found); |
c277df42 IZ |
458 | if (*data->longest == data->longest_fixed) { |
459 | data->offset_fixed = l ? data->last_start_min : data->pos_min; | |
460 | if (data->flags & SF_BEFORE_EOL) | |
b81d288d | 461 | data->flags |
c277df42 IZ |
462 | |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL); |
463 | else | |
464 | data->flags &= ~SF_FIX_BEFORE_EOL; | |
a0ed51b3 LW |
465 | } |
466 | else { | |
c277df42 | 467 | data->offset_float_min = l ? data->last_start_min : data->pos_min; |
b81d288d AB |
468 | data->offset_float_max = (l |
469 | ? data->last_start_max | |
c277df42 | 470 | : data->pos_min + data->pos_delta); |
9051bda5 HS |
471 | if ((U32)data->offset_float_max > (U32)I32_MAX) |
472 | data->offset_float_max = I32_MAX; | |
c277df42 | 473 | if (data->flags & SF_BEFORE_EOL) |
b81d288d | 474 | data->flags |
c277df42 IZ |
475 | |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL); |
476 | else | |
477 | data->flags &= ~SF_FL_BEFORE_EOL; | |
478 | } | |
479 | } | |
480 | SvCUR_set(data->last_found, 0); | |
0eda9292 | 481 | { |
a28509cc | 482 | SV * const sv = data->last_found; |
097eb12c AL |
483 | if (SvUTF8(sv) && SvMAGICAL(sv)) { |
484 | MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8); | |
485 | if (mg) | |
486 | mg->mg_len = 0; | |
487 | } | |
0eda9292 | 488 | } |
c277df42 IZ |
489 | data->last_end = -1; |
490 | data->flags &= ~SF_BEFORE_EOL; | |
491 | } | |
492 | ||
653099ff GS |
493 | /* Can match anything (initialization) */ |
494 | STATIC void | |
097eb12c | 495 | S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 496 | { |
653099ff | 497 | ANYOF_CLASS_ZERO(cl); |
f8bef550 | 498 | ANYOF_BITMAP_SETALL(cl); |
1aa99e6b | 499 | cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL; |
653099ff GS |
500 | if (LOC) |
501 | cl->flags |= ANYOF_LOCALE; | |
502 | } | |
503 | ||
504 | /* Can match anything (initialization) */ | |
505 | STATIC int | |
5f66b61c | 506 | S_cl_is_anything(const struct regnode_charclass_class *cl) |
653099ff GS |
507 | { |
508 | int value; | |
509 | ||
aaa51d5e | 510 | for (value = 0; value <= ANYOF_MAX; value += 2) |
653099ff GS |
511 | if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1)) |
512 | return 1; | |
1aa99e6b IH |
513 | if (!(cl->flags & ANYOF_UNICODE_ALL)) |
514 | return 0; | |
f8bef550 NC |
515 | if (!ANYOF_BITMAP_TESTALLSET(cl)) |
516 | return 0; | |
653099ff GS |
517 | return 1; |
518 | } | |
519 | ||
520 | /* Can match anything (initialization) */ | |
521 | STATIC void | |
097eb12c | 522 | S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 523 | { |
8ecf7187 | 524 | Zero(cl, 1, struct regnode_charclass_class); |
653099ff | 525 | cl->type = ANYOF; |
830247a4 | 526 | cl_anything(pRExC_state, cl); |
653099ff GS |
527 | } |
528 | ||
529 | STATIC void | |
097eb12c | 530 | S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 531 | { |
8ecf7187 | 532 | Zero(cl, 1, struct regnode_charclass_class); |
653099ff | 533 | cl->type = ANYOF; |
830247a4 | 534 | cl_anything(pRExC_state, cl); |
653099ff GS |
535 | if (LOC) |
536 | cl->flags |= ANYOF_LOCALE; | |
537 | } | |
538 | ||
539 | /* 'And' a given class with another one. Can create false positives */ | |
540 | /* We assume that cl is not inverted */ | |
541 | STATIC void | |
5f66b61c | 542 | S_cl_and(struct regnode_charclass_class *cl, |
a28509cc | 543 | const struct regnode_charclass_class *and_with) |
653099ff | 544 | { |
653099ff GS |
545 | if (!(and_with->flags & ANYOF_CLASS) |
546 | && !(cl->flags & ANYOF_CLASS) | |
547 | && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
548 | && !(and_with->flags & ANYOF_FOLD) | |
549 | && !(cl->flags & ANYOF_FOLD)) { | |
550 | int i; | |
551 | ||
552 | if (and_with->flags & ANYOF_INVERT) | |
553 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
554 | cl->bitmap[i] &= ~and_with->bitmap[i]; | |
555 | else | |
556 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
557 | cl->bitmap[i] &= and_with->bitmap[i]; | |
558 | } /* XXXX: logic is complicated otherwise, leave it along for a moment. */ | |
559 | if (!(and_with->flags & ANYOF_EOS)) | |
560 | cl->flags &= ~ANYOF_EOS; | |
1aa99e6b | 561 | |
14ebb1a2 JH |
562 | if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE && |
563 | !(and_with->flags & ANYOF_INVERT)) { | |
1aa99e6b IH |
564 | cl->flags &= ~ANYOF_UNICODE_ALL; |
565 | cl->flags |= ANYOF_UNICODE; | |
566 | ARG_SET(cl, ARG(and_with)); | |
567 | } | |
14ebb1a2 JH |
568 | if (!(and_with->flags & ANYOF_UNICODE_ALL) && |
569 | !(and_with->flags & ANYOF_INVERT)) | |
1aa99e6b | 570 | cl->flags &= ~ANYOF_UNICODE_ALL; |
14ebb1a2 JH |
571 | if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) && |
572 | !(and_with->flags & ANYOF_INVERT)) | |
1aa99e6b | 573 | cl->flags &= ~ANYOF_UNICODE; |
653099ff GS |
574 | } |
575 | ||
576 | /* 'OR' a given class with another one. Can create false positives */ | |
577 | /* We assume that cl is not inverted */ | |
578 | STATIC void | |
097eb12c | 579 | S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with) |
653099ff | 580 | { |
653099ff GS |
581 | if (or_with->flags & ANYOF_INVERT) { |
582 | /* We do not use | |
583 | * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2)) | |
584 | * <= (B1 | !B2) | (CL1 | !CL2) | |
585 | * which is wasteful if CL2 is small, but we ignore CL2: | |
586 | * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1 | |
587 | * XXXX Can we handle case-fold? Unclear: | |
588 | * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) = | |
589 | * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i')) | |
590 | */ | |
591 | if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
592 | && !(or_with->flags & ANYOF_FOLD) | |
593 | && !(cl->flags & ANYOF_FOLD) ) { | |
594 | int i; | |
595 | ||
596 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
597 | cl->bitmap[i] |= ~or_with->bitmap[i]; | |
598 | } /* XXXX: logic is complicated otherwise */ | |
599 | else { | |
830247a4 | 600 | cl_anything(pRExC_state, cl); |
653099ff GS |
601 | } |
602 | } else { | |
603 | /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */ | |
604 | if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
b81d288d | 605 | && (!(or_with->flags & ANYOF_FOLD) |
653099ff GS |
606 | || (cl->flags & ANYOF_FOLD)) ) { |
607 | int i; | |
608 | ||
609 | /* OR char bitmap and class bitmap separately */ | |
610 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
611 | cl->bitmap[i] |= or_with->bitmap[i]; | |
612 | if (or_with->flags & ANYOF_CLASS) { | |
613 | for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++) | |
614 | cl->classflags[i] |= or_with->classflags[i]; | |
615 | cl->flags |= ANYOF_CLASS; | |
616 | } | |
617 | } | |
618 | else { /* XXXX: logic is complicated, leave it along for a moment. */ | |
830247a4 | 619 | cl_anything(pRExC_state, cl); |
653099ff GS |
620 | } |
621 | } | |
622 | if (or_with->flags & ANYOF_EOS) | |
623 | cl->flags |= ANYOF_EOS; | |
1aa99e6b IH |
624 | |
625 | if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE && | |
626 | ARG(cl) != ARG(or_with)) { | |
627 | cl->flags |= ANYOF_UNICODE_ALL; | |
628 | cl->flags &= ~ANYOF_UNICODE; | |
629 | } | |
630 | if (or_with->flags & ANYOF_UNICODE_ALL) { | |
631 | cl->flags |= ANYOF_UNICODE_ALL; | |
632 | cl->flags &= ~ANYOF_UNICODE; | |
633 | } | |
653099ff GS |
634 | } |
635 | ||
5d1c421c | 636 | /* |
a3621e74 | 637 | |
3dab1dad | 638 | make_trie(startbranch,first,last,tail,flags,depth) |
a3621e74 YO |
639 | startbranch: the first branch in the whole branch sequence |
640 | first : start branch of sequence of branch-exact nodes. | |
641 | May be the same as startbranch | |
642 | last : Thing following the last branch. | |
643 | May be the same as tail. | |
644 | tail : item following the branch sequence | |
645 | flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/ | |
3dab1dad | 646 | depth : indent depth |
a3621e74 YO |
647 | |
648 | Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node. | |
649 | ||
650 | A trie is an N'ary tree where the branches are determined by digital | |
651 | decomposition of the key. IE, at the root node you look up the 1st character and | |
652 | follow that branch repeat until you find the end of the branches. Nodes can be | |
653 | marked as "accepting" meaning they represent a complete word. Eg: | |
654 | ||
655 | /he|she|his|hers/ | |
656 | ||
657 | would convert into the following structure. Numbers represent states, letters | |
658 | following numbers represent valid transitions on the letter from that state, if | |
659 | the number is in square brackets it represents an accepting state, otherwise it | |
660 | will be in parenthesis. | |
661 | ||
662 | +-h->+-e->[3]-+-r->(8)-+-s->[9] | |
663 | | | | |
664 | | (2) | |
665 | | | | |
666 | (1) +-i->(6)-+-s->[7] | |
667 | | | |
668 | +-s->(3)-+-h->(4)-+-e->[5] | |
669 | ||
670 | Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers) | |
671 | ||
672 | This shows that when matching against the string 'hers' we will begin at state 1 | |
673 | read 'h' and move to state 2, read 'e' and move to state 3 which is accepting, | |
674 | then read 'r' and go to state 8 followed by 's' which takes us to state 9 which | |
675 | is also accepting. Thus we know that we can match both 'he' and 'hers' with a | |
676 | single traverse. We store a mapping from accepting to state to which word was | |
677 | matched, and then when we have multiple possibilities we try to complete the | |
678 | rest of the regex in the order in which they occured in the alternation. | |
679 | ||
680 | The only prior NFA like behaviour that would be changed by the TRIE support is | |
681 | the silent ignoring of duplicate alternations which are of the form: | |
682 | ||
683 | / (DUPE|DUPE) X? (?{ ... }) Y /x | |
684 | ||
685 | Thus EVAL blocks follwing a trie may be called a different number of times with | |
686 | and without the optimisation. With the optimisations dupes will be silently | |
687 | ignored. This inconsistant behaviour of EVAL type nodes is well established as | |
688 | the following demonstrates: | |
689 | ||
690 | 'words'=~/(word|word|word)(?{ print $1 })[xyz]/ | |
691 | ||
692 | which prints out 'word' three times, but | |
693 | ||
694 | 'words'=~/(word|word|word)(?{ print $1 })S/ | |
695 | ||
696 | which doesnt print it out at all. This is due to other optimisations kicking in. | |
697 | ||
698 | Example of what happens on a structural level: | |
699 | ||
700 | The regexp /(ac|ad|ab)+/ will produce the folowing debug output: | |
701 | ||
702 | 1: CURLYM[1] {1,32767}(18) | |
703 | 5: BRANCH(8) | |
704 | 6: EXACT <ac>(16) | |
705 | 8: BRANCH(11) | |
706 | 9: EXACT <ad>(16) | |
707 | 11: BRANCH(14) | |
708 | 12: EXACT <ab>(16) | |
709 | 16: SUCCEED(0) | |
710 | 17: NOTHING(18) | |
711 | 18: END(0) | |
712 | ||
713 | This would be optimizable with startbranch=5, first=5, last=16, tail=16 | |
714 | and should turn into: | |
715 | ||
716 | 1: CURLYM[1] {1,32767}(18) | |
717 | 5: TRIE(16) | |
718 | [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1] | |
719 | <ac> | |
720 | <ad> | |
721 | <ab> | |
722 | 16: SUCCEED(0) | |
723 | 17: NOTHING(18) | |
724 | 18: END(0) | |
725 | ||
726 | Cases where tail != last would be like /(?foo|bar)baz/: | |
727 | ||
728 | 1: BRANCH(4) | |
729 | 2: EXACT <foo>(8) | |
730 | 4: BRANCH(7) | |
731 | 5: EXACT <bar>(8) | |
732 | 7: TAIL(8) | |
733 | 8: EXACT <baz>(10) | |
734 | 10: END(0) | |
735 | ||
736 | which would be optimizable with startbranch=1, first=1, last=7, tail=8 | |
737 | and would end up looking like: | |
738 | ||
739 | 1: TRIE(8) | |
740 | [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1] | |
741 | <foo> | |
742 | <bar> | |
743 | 7: TAIL(8) | |
744 | 8: EXACT <baz>(10) | |
745 | 10: END(0) | |
746 | ||
3dab1dad YO |
747 | d = uvuni_to_utf8_flags(d, uv, 0); |
748 | ||
749 | is the recommended Unicode-aware way of saying | |
750 | ||
751 | *(d++) = uv; | |
a3621e74 YO |
752 | */ |
753 | ||
3dab1dad YO |
754 | #define TRIE_STORE_REVCHAR \ |
755 | STMT_START { \ | |
756 | SV *tmp = Perl_newSVpvf_nocontext( "%c", (int)uvc ); \ | |
ab3bbdeb | 757 | if (UTF) SvUTF8_on(tmp); \ |
3dab1dad YO |
758 | av_push( TRIE_REVCHARMAP(trie), tmp ); \ |
759 | } STMT_END | |
a3621e74 YO |
760 | |
761 | #define TRIE_READ_CHAR STMT_START { \ | |
07be1b83 | 762 | wordlen++; \ |
a3621e74 YO |
763 | if ( UTF ) { \ |
764 | if ( folder ) { \ | |
765 | if ( foldlen > 0 ) { \ | |
766 | uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \ | |
767 | foldlen -= len; \ | |
768 | scan += len; \ | |
769 | len = 0; \ | |
770 | } else { \ | |
e1ec3a88 | 771 | uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\ |
a3621e74 YO |
772 | uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \ |
773 | foldlen -= UNISKIP( uvc ); \ | |
774 | scan = foldbuf + UNISKIP( uvc ); \ | |
775 | } \ | |
776 | } else { \ | |
e1ec3a88 | 777 | uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\ |
a3621e74 YO |
778 | } \ |
779 | } else { \ | |
780 | uvc = (U32)*uc; \ | |
781 | len = 1; \ | |
782 | } \ | |
783 | } STMT_END | |
784 | ||
785 | ||
786 | #define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ] | |
787 | #define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid ) | |
788 | #define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate ) | |
789 | #define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 ) | |
790 | ||
791 | #define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \ | |
792 | if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \ | |
793 | TRIE_LIST_LEN( state ) *= 2; \ | |
794 | Renew( trie->states[ state ].trans.list, \ | |
795 | TRIE_LIST_LEN( state ), reg_trie_trans_le ); \ | |
796 | } \ | |
797 | TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \ | |
798 | TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \ | |
799 | TRIE_LIST_CUR( state )++; \ | |
800 | } STMT_END | |
801 | ||
802 | #define TRIE_LIST_NEW(state) STMT_START { \ | |
a02a5408 | 803 | Newxz( trie->states[ state ].trans.list, \ |
a3621e74 YO |
804 | 4, reg_trie_trans_le ); \ |
805 | TRIE_LIST_CUR( state ) = 1; \ | |
806 | TRIE_LIST_LEN( state ) = 4; \ | |
807 | } STMT_END | |
808 | ||
07be1b83 YO |
809 | #define TRIE_HANDLE_WORD(state) STMT_START { \ |
810 | if ( !trie->states[ state ].wordnum ) { \ | |
811 | /* we haven't inserted this word into the structure yet. */ \ | |
812 | if (trie->wordlen) \ | |
813 | trie->wordlen[ curword ] = wordlen; \ | |
3dab1dad YO |
814 | trie->states[ state ].wordnum = ++curword; \ |
815 | DEBUG_r({ \ | |
816 | /* store the word for dumping */ \ | |
817 | SV* tmp; \ | |
07be1b83 YO |
818 | if (OP(noper) != NOTHING) \ |
819 | tmp = newSVpvn(STRING(noper), STR_LEN(noper)); \ | |
3dab1dad | 820 | else \ |
07be1b83 | 821 | tmp = newSVpvn( "", 0 ); \ |
3dab1dad YO |
822 | if ( UTF ) SvUTF8_on( tmp ); \ |
823 | av_push( trie->words, tmp ); \ | |
824 | }); \ | |
825 | } else { \ | |
826 | NOOP; /* It's a dupe. So ignore it. */ \ | |
827 | } \ | |
828 | } STMT_END | |
829 | ||
830 | #ifdef DEBUGGING | |
07be1b83 | 831 | /* |
3dab1dad YO |
832 | dump_trie(trie) |
833 | dump_trie_interim_list(trie,next_alloc) | |
834 | dump_trie_interim_table(trie,next_alloc) | |
835 | ||
836 | These routines dump out a trie in a somewhat readable format. | |
07be1b83 YO |
837 | The _interim_ variants are used for debugging the interim |
838 | tables that are used to generate the final compressed | |
839 | representation which is what dump_trie expects. | |
840 | ||
3dab1dad YO |
841 | Part of the reason for their existance is to provide a form |
842 | of documentation as to how the different representations function. | |
07be1b83 YO |
843 | |
844 | */ | |
3dab1dad YO |
845 | |
846 | /* | |
847 | dump_trie(trie) | |
848 | Dumps the final compressed table form of the trie to Perl_debug_log. | |
849 | Used for debugging make_trie(). | |
850 | */ | |
851 | ||
852 | STATIC void | |
853 | S_dump_trie(pTHX_ const struct _reg_trie_data *trie,U32 depth) | |
854 | { | |
855 | U32 state; | |
ab3bbdeb YO |
856 | SV *sv=sv_newmortal(); |
857 | int colwidth= trie->widecharmap ? 6 : 4; | |
3dab1dad YO |
858 | GET_RE_DEBUG_FLAGS_DECL; |
859 | ||
ab3bbdeb | 860 | |
3dab1dad YO |
861 | PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ", |
862 | (int)depth * 2 + 2,"", | |
863 | "Match","Base","Ofs" ); | |
864 | ||
865 | for( state = 0 ; state < trie->uniquecharcount ; state++ ) { | |
be8e71aa | 866 | SV ** const tmp = av_fetch( trie->revcharmap, state, 0); |
3dab1dad | 867 | if ( tmp ) { |
ab3bbdeb YO |
868 | PerlIO_printf( Perl_debug_log, "%*s", |
869 | colwidth, | |
870 | pv_pretty(sv, (U8*)SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, | |
871 | PL_colors[0], PL_colors[1], | |
872 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
873 | PERL_PV_ESCAPE_FIRSTCHAR | |
874 | ) | |
875 | ); | |
3dab1dad YO |
876 | } |
877 | } | |
878 | PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------", | |
879 | (int)depth * 2 + 2,""); | |
880 | ||
881 | for( state = 0 ; state < trie->uniquecharcount ; state++ ) | |
ab3bbdeb | 882 | PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------"); |
3dab1dad YO |
883 | PerlIO_printf( Perl_debug_log, "\n"); |
884 | ||
885 | for( state = 1 ; state < TRIE_LASTSTATE(trie) ; state++ ) { | |
be8e71aa | 886 | const U32 base = trie->states[ state ].trans.base; |
3dab1dad YO |
887 | |
888 | PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state); | |
889 | ||
890 | if ( trie->states[ state ].wordnum ) { | |
891 | PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum ); | |
892 | } else { | |
893 | PerlIO_printf( Perl_debug_log, "%6s", "" ); | |
894 | } | |
895 | ||
896 | PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base ); | |
897 | ||
898 | if ( base ) { | |
899 | U32 ofs = 0; | |
900 | ||
901 | while( ( base + ofs < trie->uniquecharcount ) || | |
902 | ( base + ofs - trie->uniquecharcount < trie->lasttrans | |
903 | && trie->trans[ base + ofs - trie->uniquecharcount ].check != state)) | |
904 | ofs++; | |
905 | ||
906 | PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs); | |
907 | ||
908 | for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) { | |
909 | if ( ( base + ofs >= trie->uniquecharcount ) && | |
910 | ( base + ofs - trie->uniquecharcount < trie->lasttrans ) && | |
911 | trie->trans[ base + ofs - trie->uniquecharcount ].check == state ) | |
912 | { | |
ab3bbdeb YO |
913 | PerlIO_printf( Perl_debug_log, "%*"UVXf, |
914 | colwidth, | |
3dab1dad YO |
915 | (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next ); |
916 | } else { | |
ab3bbdeb | 917 | PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." ); |
3dab1dad YO |
918 | } |
919 | } | |
920 | ||
921 | PerlIO_printf( Perl_debug_log, "]"); | |
922 | ||
923 | } | |
924 | PerlIO_printf( Perl_debug_log, "\n" ); | |
925 | } | |
926 | } | |
927 | /* | |
928 | dump_trie_interim_list(trie,next_alloc) | |
929 | Dumps a fully constructed but uncompressed trie in list form. | |
930 | List tries normally only are used for construction when the number of | |
931 | possible chars (trie->uniquecharcount) is very high. | |
932 | Used for debugging make_trie(). | |
933 | */ | |
934 | STATIC void | |
935 | S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie, U32 next_alloc,U32 depth) | |
936 | { | |
937 | U32 state; | |
ab3bbdeb YO |
938 | SV *sv=sv_newmortal(); |
939 | int colwidth= trie->widecharmap ? 6 : 4; | |
3dab1dad YO |
940 | GET_RE_DEBUG_FLAGS_DECL; |
941 | /* print out the table precompression. */ | |
ab3bbdeb YO |
942 | PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s", |
943 | (int)depth * 2 + 2,"", (int)depth * 2 + 2,"", | |
944 | "------:-----+-----------------\n" ); | |
3dab1dad YO |
945 | |
946 | for( state=1 ; state < next_alloc ; state ++ ) { | |
947 | U16 charid; | |
948 | ||
ab3bbdeb | 949 | PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :", |
3dab1dad YO |
950 | (int)depth * 2 + 2,"", (UV)state ); |
951 | if ( ! trie->states[ state ].wordnum ) { | |
952 | PerlIO_printf( Perl_debug_log, "%5s| ",""); | |
953 | } else { | |
954 | PerlIO_printf( Perl_debug_log, "W%4x| ", | |
955 | trie->states[ state ].wordnum | |
956 | ); | |
957 | } | |
958 | for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) { | |
be8e71aa | 959 | SV ** const tmp = av_fetch( trie->revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0); |
ab3bbdeb YO |
960 | if ( tmp ) { |
961 | PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ", | |
962 | colwidth, | |
963 | pv_pretty(sv, (U8*)SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, | |
964 | PL_colors[0], PL_colors[1], | |
965 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
966 | PERL_PV_ESCAPE_FIRSTCHAR | |
967 | ) , | |
3dab1dad YO |
968 | TRIE_LIST_ITEM(state,charid).forid, |
969 | (UV)TRIE_LIST_ITEM(state,charid).newstate | |
970 | ); | |
971 | } | |
ab3bbdeb YO |
972 | } |
973 | PerlIO_printf( Perl_debug_log, "\n"); | |
3dab1dad YO |
974 | } |
975 | } | |
976 | ||
977 | /* | |
978 | dump_trie_interim_table(trie,next_alloc) | |
979 | Dumps a fully constructed but uncompressed trie in table form. | |
980 | This is the normal DFA style state transition table, with a few | |
981 | twists to facilitate compression later. | |
982 | Used for debugging make_trie(). | |
983 | */ | |
984 | STATIC void | |
985 | S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie, U32 next_alloc, U32 depth) | |
986 | { | |
987 | U32 state; | |
988 | U16 charid; | |
ab3bbdeb YO |
989 | SV *sv=sv_newmortal(); |
990 | int colwidth= trie->widecharmap ? 6 : 4; | |
3dab1dad YO |
991 | GET_RE_DEBUG_FLAGS_DECL; |
992 | ||
993 | /* | |
994 | print out the table precompression so that we can do a visual check | |
995 | that they are identical. | |
996 | */ | |
997 | ||
998 | PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" ); | |
999 | ||
1000 | for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) { | |
be8e71aa | 1001 | SV ** const tmp = av_fetch( trie->revcharmap, charid, 0); |
3dab1dad | 1002 | if ( tmp ) { |
ab3bbdeb YO |
1003 | PerlIO_printf( Perl_debug_log, "%*s", |
1004 | colwidth, | |
1005 | pv_pretty(sv, (U8*)SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, | |
1006 | PL_colors[0], PL_colors[1], | |
1007 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
1008 | PERL_PV_ESCAPE_FIRSTCHAR | |
1009 | ) | |
1010 | ); | |
3dab1dad YO |
1011 | } |
1012 | } | |
1013 | ||
1014 | PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" ); | |
1015 | ||
1016 | for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) { | |
ab3bbdeb | 1017 | PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------"); |
3dab1dad YO |
1018 | } |
1019 | ||
1020 | PerlIO_printf( Perl_debug_log, "\n" ); | |
1021 | ||
1022 | for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) { | |
1023 | ||
1024 | PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ", | |
1025 | (int)depth * 2 + 2,"", | |
1026 | (UV)TRIE_NODENUM( state ) ); | |
1027 | ||
1028 | for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) { | |
ab3bbdeb YO |
1029 | UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next ); |
1030 | if (v) | |
1031 | PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v ); | |
1032 | else | |
1033 | PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." ); | |
3dab1dad YO |
1034 | } |
1035 | if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) { | |
1036 | PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check ); | |
1037 | } else { | |
1038 | PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check, | |
1039 | trie->states[ TRIE_NODENUM( state ) ].wordnum ); | |
1040 | } | |
1041 | } | |
07be1b83 | 1042 | } |
3dab1dad YO |
1043 | |
1044 | #endif | |
1045 | ||
07be1b83 YO |
1046 | #define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \ |
1047 | ( ( base + charid >= ucharcount \ | |
1048 | && base + charid < ubound \ | |
1049 | && state == trie->trans[ base - ucharcount + charid ].check \ | |
1050 | && trie->trans[ base - ucharcount + charid ].next ) \ | |
1051 | ? trie->trans[ base - ucharcount + charid ].next \ | |
1052 | : ( state==1 ? special : 0 ) \ | |
1053 | ) | |
3dab1dad | 1054 | |
07be1b83 YO |
1055 | STATIC void |
1056 | S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth) | |
1057 | { | |
1058 | /* The Trie is constructed and compressed now so we can build a fail array now if its needed | |
1059 | ||
1060 | This is apparently the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the | |
1061 | "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88 | |
1062 | ISBN 0-201-10088-6 | |
1063 | ||
1064 | We find the fail state for each state in the trie, this state is the longest proper | |
1065 | suffix of the current states 'word' that is also a proper prefix of another word in our | |
1066 | trie. State 1 represents the word '' and is the thus the default fail state. This allows | |
1067 | the DFA not to have to restart after its tried and failed a word at a given point, it | |
1068 | simply continues as though it had been matching the other word in the first place. | |
1069 | Consider | |
1070 | 'abcdgu'=~/abcdefg|cdgu/ | |
1071 | When we get to 'd' we are still matching the first word, we would encounter 'g' which would | |
1072 | fail, which would bring use to the state representing 'd' in the second word where we would | |
1073 | try 'g' and succeed, prodceding to match 'cdgu'. | |
1074 | */ | |
1075 | /* add a fail transition */ | |
1076 | reg_trie_data *trie=(reg_trie_data *)RExC_rx->data->data[ARG(source)]; | |
1077 | U32 *q; | |
be8e71aa YO |
1078 | const U32 ucharcount = trie->uniquecharcount; |
1079 | const U32 numstates = trie->laststate; | |
1080 | const U32 ubound = trie->lasttrans + ucharcount; | |
07be1b83 YO |
1081 | U32 q_read = 0; |
1082 | U32 q_write = 0; | |
1083 | U32 charid; | |
1084 | U32 base = trie->states[ 1 ].trans.base; | |
07be1b83 YO |
1085 | U32 *fail; |
1086 | reg_ac_data *aho; | |
1087 | const U32 data_slot = add_data( pRExC_state, 1, "T" ); | |
72f13be8 | 1088 | GET_RE_DEBUG_FLAGS_DECL; |
f9049ba1 SP |
1089 | #ifndef DEBUGGING |
1090 | PERL_UNUSED_ARG(depth); | |
1091 | #endif | |
72f13be8 | 1092 | |
07be1b83 YO |
1093 | |
1094 | ARG_SET( stclass, data_slot ); | |
1095 | Newxz( aho, 1, reg_ac_data ); | |
1096 | RExC_rx->data->data[ data_slot ] = (void*)aho; | |
1097 | aho->trie=trie; | |
1098 | aho->states=(reg_trie_state *)savepvn((const char*)trie->states, | |
1099 | (trie->laststate+1)*sizeof(reg_trie_state)); | |
1100 | Newxz( q, numstates, U32); | |
1101 | Newxz( aho->fail, numstates, U32 ); | |
283d8f99 YO |
1102 | aho->refcount = 1; |
1103 | fail = aho->fail; | |
07be1b83 YO |
1104 | fail[ 0 ] = fail[ 1 ] = 1; |
1105 | ||
1106 | for ( charid = 0; charid < ucharcount ; charid++ ) { | |
be8e71aa YO |
1107 | const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 ); |
1108 | if ( newstate ) { | |
07be1b83 YO |
1109 | q[ q_write ] = newstate; |
1110 | /* set to point at the root */ | |
1111 | fail[ q[ q_write++ ] ]=1; | |
1112 | } | |
1113 | } | |
1114 | while ( q_read < q_write) { | |
be8e71aa | 1115 | const U32 cur = q[ q_read++ % numstates ]; |
07be1b83 YO |
1116 | base = trie->states[ cur ].trans.base; |
1117 | ||
1118 | for ( charid = 0 ; charid < ucharcount ; charid++ ) { | |
be8e71aa YO |
1119 | const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 ); |
1120 | if (ch_state) { | |
07be1b83 YO |
1121 | U32 fail_state = cur; |
1122 | U32 fail_base; | |
1123 | do { | |
1124 | fail_state = fail[ fail_state ]; | |
1125 | fail_base = aho->states[ fail_state ].trans.base; | |
1126 | } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) ); | |
1127 | ||
1128 | fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ); | |
1129 | fail[ ch_state ] = fail_state; | |
1130 | if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum ) | |
1131 | { | |
1132 | aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum; | |
1133 | } | |
1134 | q[ q_write++ % numstates] = ch_state; | |
1135 | } | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | DEBUG_TRIE_COMPILE_MORE_r({ | |
1140 | PerlIO_printf(Perl_debug_log, "%*sFail: 1", (int)(depth * 2), ""); | |
1141 | for( q_read=2; q_read<numstates; q_read++ ) { | |
1142 | PerlIO_printf(Perl_debug_log, ", %"UVuf, fail[q_read]); | |
1143 | } | |
1144 | PerlIO_printf(Perl_debug_log, "\n"); | |
1145 | }); | |
1146 | Safefree(q); | |
1147 | /*RExC_seen |= REG_SEEN_TRIEDFA;*/ | |
1148 | } | |
3dab1dad YO |
1149 | |
1150 | ||
1151 | ||
a3621e74 | 1152 | STATIC I32 |
3dab1dad | 1153 | S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 flags, U32 depth) |
a3621e74 | 1154 | { |
27da23d5 | 1155 | dVAR; |
a3621e74 YO |
1156 | /* first pass, loop through and scan words */ |
1157 | reg_trie_data *trie; | |
1158 | regnode *cur; | |
9f7f3913 | 1159 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
a3621e74 YO |
1160 | STRLEN len = 0; |
1161 | UV uvc = 0; | |
1162 | U16 curword = 0; | |
1163 | U32 next_alloc = 0; | |
1164 | /* we just use folder as a flag in utf8 */ | |
e1ec3a88 | 1165 | const U8 * const folder = ( flags == EXACTF |
a3621e74 YO |
1166 | ? PL_fold |
1167 | : ( flags == EXACTFL | |
1168 | ? PL_fold_locale | |
1169 | : NULL | |
1170 | ) | |
1171 | ); | |
1172 | ||
e1ec3a88 | 1173 | const U32 data_slot = add_data( pRExC_state, 1, "t" ); |
a3621e74 | 1174 | SV *re_trie_maxbuff; |
3dab1dad YO |
1175 | #ifndef DEBUGGING |
1176 | /* these are only used during construction but are useful during | |
8e11feef RGS |
1177 | * debugging so we store them in the struct when debugging. |
1178 | * Wordcount is actually superfluous in debugging as we have | |
1179 | * (AV*)trie->words to use for it, but that's not available when | |
1180 | * not debugging... We could make the macro use the AV during | |
1181 | * debugging though... | |
1182 | */ | |
3dab1dad YO |
1183 | U16 trie_wordcount=0; |
1184 | STRLEN trie_charcount=0; | |
07be1b83 | 1185 | /*U32 trie_laststate=0;*/ |
3dab1dad YO |
1186 | AV *trie_revcharmap; |
1187 | #endif | |
a3621e74 | 1188 | GET_RE_DEBUG_FLAGS_DECL; |
72f13be8 YO |
1189 | #ifndef DEBUGGING |
1190 | PERL_UNUSED_ARG(depth); | |
1191 | #endif | |
a3621e74 | 1192 | |
a02a5408 | 1193 | Newxz( trie, 1, reg_trie_data ); |
a3621e74 | 1194 | trie->refcount = 1; |
3dab1dad | 1195 | trie->startstate = 1; |
a3621e74 | 1196 | RExC_rx->data->data[ data_slot ] = (void*)trie; |
a02a5408 | 1197 | Newxz( trie->charmap, 256, U16 ); |
3dab1dad YO |
1198 | if (!(UTF && folder)) |
1199 | Newxz( trie->bitmap, ANYOF_BITMAP_SIZE, char ); | |
a3621e74 YO |
1200 | DEBUG_r({ |
1201 | trie->words = newAV(); | |
a3621e74 | 1202 | }); |
3dab1dad | 1203 | TRIE_REVCHARMAP(trie) = newAV(); |
a3621e74 | 1204 | |
0111c4fd | 1205 | re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1); |
a3621e74 | 1206 | if (!SvIOK(re_trie_maxbuff)) { |
0111c4fd | 1207 | sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT); |
a3621e74 | 1208 | } |
3dab1dad YO |
1209 | DEBUG_OPTIMISE_r({ |
1210 | PerlIO_printf( Perl_debug_log, | |
1211 | "%*smake_trie start==%d, first==%d, last==%d, tail==%d\n", | |
1212 | (int)depth * 2 + 2, "", | |
1213 | REG_NODE_NUM(startbranch),REG_NODE_NUM(first), | |
1214 | REG_NODE_NUM(last), REG_NODE_NUM(tail)); | |
1215 | }); | |
a3621e74 YO |
1216 | /* -- First loop and Setup -- |
1217 | ||
1218 | We first traverse the branches and scan each word to determine if it | |
1219 | contains widechars, and how many unique chars there are, this is | |
1220 | important as we have to build a table with at least as many columns as we | |
1221 | have unique chars. | |
1222 | ||
1223 | We use an array of integers to represent the character codes 0..255 | |
1224 | (trie->charmap) and we use a an HV* to store unicode characters. We use the | |
1225 | native representation of the character value as the key and IV's for the | |
1226 | coded index. | |
1227 | ||
1228 | *TODO* If we keep track of how many times each character is used we can | |
1229 | remap the columns so that the table compression later on is more | |
1230 | efficient in terms of memory by ensuring most common value is in the | |
1231 | middle and the least common are on the outside. IMO this would be better | |
1232 | than a most to least common mapping as theres a decent chance the most | |
1233 | common letter will share a node with the least common, meaning the node | |
1234 | will not be compressable. With a middle is most common approach the worst | |
1235 | case is when we have the least common nodes twice. | |
1236 | ||
1237 | */ | |
1238 | ||
a3621e74 | 1239 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
c445ea15 | 1240 | regnode * const noper = NEXTOPER( cur ); |
e1ec3a88 | 1241 | const U8 *uc = (U8*)STRING( noper ); |
a28509cc | 1242 | const U8 * const e = uc + STR_LEN( noper ); |
a3621e74 YO |
1243 | STRLEN foldlen = 0; |
1244 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; | |
2af232bd | 1245 | const U8 *scan = (U8*)NULL; |
07be1b83 | 1246 | U32 wordlen = 0; /* required init */ |
3dab1dad | 1247 | STRLEN chars=0; |
a3621e74 | 1248 | |
3dab1dad YO |
1249 | TRIE_WORDCOUNT(trie)++; |
1250 | if (OP(noper) == NOTHING) { | |
1251 | trie->minlen= 0; | |
1252 | continue; | |
1253 | } | |
1254 | if (trie->bitmap) { | |
1255 | TRIE_BITMAP_SET(trie,*uc); | |
1256 | if ( folder ) TRIE_BITMAP_SET(trie,folder[ *uc ]); | |
1257 | } | |
a3621e74 | 1258 | for ( ; uc < e ; uc += len ) { |
3dab1dad | 1259 | TRIE_CHARCOUNT(trie)++; |
a3621e74 | 1260 | TRIE_READ_CHAR; |
3dab1dad | 1261 | chars++; |
a3621e74 YO |
1262 | if ( uvc < 256 ) { |
1263 | if ( !trie->charmap[ uvc ] ) { | |
1264 | trie->charmap[ uvc ]=( ++trie->uniquecharcount ); | |
1265 | if ( folder ) | |
1266 | trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ]; | |
3dab1dad | 1267 | TRIE_STORE_REVCHAR; |
a3621e74 YO |
1268 | } |
1269 | } else { | |
1270 | SV** svpp; | |
1271 | if ( !trie->widecharmap ) | |
1272 | trie->widecharmap = newHV(); | |
1273 | ||
1274 | svpp = hv_fetch( trie->widecharmap, (char*)&uvc, sizeof( UV ), 1 ); | |
1275 | ||
1276 | if ( !svpp ) | |
e4584336 | 1277 | Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc ); |
a3621e74 YO |
1278 | |
1279 | if ( !SvTRUE( *svpp ) ) { | |
1280 | sv_setiv( *svpp, ++trie->uniquecharcount ); | |
3dab1dad | 1281 | TRIE_STORE_REVCHAR; |
a3621e74 YO |
1282 | } |
1283 | } | |
1284 | } | |
3dab1dad YO |
1285 | if( cur == first ) { |
1286 | trie->minlen=chars; | |
1287 | trie->maxlen=chars; | |
1288 | } else if (chars < trie->minlen) { | |
1289 | trie->minlen=chars; | |
1290 | } else if (chars > trie->maxlen) { | |
1291 | trie->maxlen=chars; | |
1292 | } | |
1293 | ||
a3621e74 YO |
1294 | } /* end first pass */ |
1295 | DEBUG_TRIE_COMPILE_r( | |
3dab1dad YO |
1296 | PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n", |
1297 | (int)depth * 2 + 2,"", | |
1298 | ( trie->widecharmap ? "UTF8" : "NATIVE" ), TRIE_WORDCOUNT(trie), | |
be8e71aa YO |
1299 | (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount, |
1300 | (int)trie->minlen, (int)trie->maxlen ) | |
a3621e74 | 1301 | ); |
07be1b83 | 1302 | Newxz( trie->wordlen, TRIE_WORDCOUNT(trie), U32 ); |
a3621e74 YO |
1303 | |
1304 | /* | |
1305 | We now know what we are dealing with in terms of unique chars and | |
1306 | string sizes so we can calculate how much memory a naive | |
0111c4fd RGS |
1307 | representation using a flat table will take. If it's over a reasonable |
1308 | limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory | |
a3621e74 YO |
1309 | conservative but potentially much slower representation using an array |
1310 | of lists. | |
1311 | ||
1312 | At the end we convert both representations into the same compressed | |
1313 | form that will be used in regexec.c for matching with. The latter | |
1314 | is a form that cannot be used to construct with but has memory | |
1315 | properties similar to the list form and access properties similar | |
1316 | to the table form making it both suitable for fast searches and | |
1317 | small enough that its feasable to store for the duration of a program. | |
1318 | ||
1319 | See the comment in the code where the compressed table is produced | |
1320 | inplace from the flat tabe representation for an explanation of how | |
1321 | the compression works. | |
1322 | ||
1323 | */ | |
1324 | ||
1325 | ||
3dab1dad | 1326 | if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) { |
a3621e74 YO |
1327 | /* |
1328 | Second Pass -- Array Of Lists Representation | |
1329 | ||
1330 | Each state will be represented by a list of charid:state records | |
1331 | (reg_trie_trans_le) the first such element holds the CUR and LEN | |
1332 | points of the allocated array. (See defines above). | |
1333 | ||
1334 | We build the initial structure using the lists, and then convert | |
1335 | it into the compressed table form which allows faster lookups | |
1336 | (but cant be modified once converted). | |
a3621e74 YO |
1337 | */ |
1338 | ||
a3621e74 YO |
1339 | STRLEN transcount = 1; |
1340 | ||
3dab1dad | 1341 | Newxz( trie->states, TRIE_CHARCOUNT(trie) + 2, reg_trie_state ); |
a3621e74 YO |
1342 | TRIE_LIST_NEW(1); |
1343 | next_alloc = 2; | |
1344 | ||
1345 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { | |
1346 | ||
c445ea15 AL |
1347 | regnode * const noper = NEXTOPER( cur ); |
1348 | U8 *uc = (U8*)STRING( noper ); | |
1349 | const U8 * const e = uc + STR_LEN( noper ); | |
1350 | U32 state = 1; /* required init */ | |
1351 | U16 charid = 0; /* sanity init */ | |
1352 | U8 *scan = (U8*)NULL; /* sanity init */ | |
1353 | STRLEN foldlen = 0; /* required init */ | |
07be1b83 | 1354 | U32 wordlen = 0; /* required init */ |
c445ea15 AL |
1355 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
1356 | ||
3dab1dad | 1357 | if (OP(noper) != NOTHING) { |
c445ea15 AL |
1358 | for ( ; uc < e ; uc += len ) { |
1359 | ||
1360 | TRIE_READ_CHAR; | |
1361 | ||
1362 | if ( uvc < 256 ) { | |
1363 | charid = trie->charmap[ uvc ]; | |
1364 | } else { | |
1365 | SV** const svpp = hv_fetch( trie->widecharmap, (char*)&uvc, sizeof( UV ), 0); | |
1366 | if ( !svpp ) { | |
1367 | charid = 0; | |
1368 | } else { | |
1369 | charid=(U16)SvIV( *svpp ); | |
1370 | } | |
1371 | } | |
1372 | if ( charid ) { | |
a3621e74 | 1373 | |
c445ea15 AL |
1374 | U16 check; |
1375 | U32 newstate = 0; | |
a3621e74 | 1376 | |
c445ea15 AL |
1377 | charid--; |
1378 | if ( !trie->states[ state ].trans.list ) { | |
1379 | TRIE_LIST_NEW( state ); | |
1380 | } | |
1381 | for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) { | |
1382 | if ( TRIE_LIST_ITEM( state, check ).forid == charid ) { | |
1383 | newstate = TRIE_LIST_ITEM( state, check ).newstate; | |
1384 | break; | |
1385 | } | |
1386 | } | |
1387 | if ( ! newstate ) { | |
1388 | newstate = next_alloc++; | |
1389 | TRIE_LIST_PUSH( state, charid, newstate ); | |
1390 | transcount++; | |
1391 | } | |
1392 | state = newstate; | |
1393 | } else { | |
1394 | Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc ); | |
a28509cc | 1395 | } |
c445ea15 AL |
1396 | /* charid is now 0 if we dont know the char read, or nonzero if we do */ |
1397 | } | |
c445ea15 | 1398 | } |
3dab1dad | 1399 | TRIE_HANDLE_WORD(state); |
a3621e74 YO |
1400 | |
1401 | } /* end second pass */ | |
1402 | ||
3dab1dad | 1403 | TRIE_LASTSTATE(trie) = next_alloc; |
a3621e74 YO |
1404 | Renew( trie->states, next_alloc, reg_trie_state ); |
1405 | ||
3dab1dad YO |
1406 | /* and now dump it out before we compress it */ |
1407 | DEBUG_TRIE_COMPILE_MORE_r( | |
1408 | dump_trie_interim_list(trie,next_alloc,depth+1) | |
a3621e74 | 1409 | ); |
a3621e74 | 1410 | |
a02a5408 | 1411 | Newxz( trie->trans, transcount ,reg_trie_trans ); |
a3621e74 YO |
1412 | { |
1413 | U32 state; | |
a3621e74 YO |
1414 | U32 tp = 0; |
1415 | U32 zp = 0; | |
1416 | ||
1417 | ||
1418 | for( state=1 ; state < next_alloc ; state ++ ) { | |
1419 | U32 base=0; | |
1420 | ||
1421 | /* | |
1422 | DEBUG_TRIE_COMPILE_MORE_r( | |
1423 | PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp) | |
1424 | ); | |
1425 | */ | |
1426 | ||
1427 | if (trie->states[state].trans.list) { | |
1428 | U16 minid=TRIE_LIST_ITEM( state, 1).forid; | |
1429 | U16 maxid=minid; | |
a28509cc | 1430 | U16 idx; |
a3621e74 YO |
1431 | |
1432 | for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) { | |
c445ea15 AL |
1433 | const U16 forid = TRIE_LIST_ITEM( state, idx).forid; |
1434 | if ( forid < minid ) { | |
1435 | minid=forid; | |
1436 | } else if ( forid > maxid ) { | |
1437 | maxid=forid; | |
1438 | } | |
a3621e74 YO |
1439 | } |
1440 | if ( transcount < tp + maxid - minid + 1) { | |
1441 | transcount *= 2; | |
1442 | Renew( trie->trans, transcount, reg_trie_trans ); | |
1443 | Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans ); | |
1444 | } | |
1445 | base = trie->uniquecharcount + tp - minid; | |
1446 | if ( maxid == minid ) { | |
1447 | U32 set = 0; | |
1448 | for ( ; zp < tp ; zp++ ) { | |
1449 | if ( ! trie->trans[ zp ].next ) { | |
1450 | base = trie->uniquecharcount + zp - minid; | |
1451 | trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate; | |
1452 | trie->trans[ zp ].check = state; | |
1453 | set = 1; | |
1454 | break; | |
1455 | } | |
1456 | } | |
1457 | if ( !set ) { | |
1458 | trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate; | |
1459 | trie->trans[ tp ].check = state; | |
1460 | tp++; | |
1461 | zp = tp; | |
1462 | } | |
1463 | } else { | |
1464 | for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) { | |
c445ea15 | 1465 | const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid; |
a3621e74 YO |
1466 | trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate; |
1467 | trie->trans[ tid ].check = state; | |
1468 | } | |
1469 | tp += ( maxid - minid + 1 ); | |
1470 | } | |
1471 | Safefree(trie->states[ state ].trans.list); | |
1472 | } | |
1473 | /* | |
1474 | DEBUG_TRIE_COMPILE_MORE_r( | |
1475 | PerlIO_printf( Perl_debug_log, " base: %d\n",base); | |
1476 | ); | |
1477 | */ | |
1478 | trie->states[ state ].trans.base=base; | |
1479 | } | |
cc601c31 | 1480 | trie->lasttrans = tp + 1; |
a3621e74 YO |
1481 | } |
1482 | } else { | |
1483 | /* | |
1484 | Second Pass -- Flat Table Representation. | |
1485 | ||
1486 | we dont use the 0 slot of either trans[] or states[] so we add 1 to each. | |
1487 | We know that we will need Charcount+1 trans at most to store the data | |
1488 | (one row per char at worst case) So we preallocate both structures | |
1489 | assuming worst case. | |
1490 | ||
1491 | We then construct the trie using only the .next slots of the entry | |
1492 | structs. | |
1493 | ||
1494 | We use the .check field of the first entry of the node temporarily to | |
1495 | make compression both faster and easier by keeping track of how many non | |
1496 | zero fields are in the node. | |
1497 | ||
1498 | Since trans are numbered from 1 any 0 pointer in the table is a FAIL | |
1499 | transition. | |
1500 | ||
1501 | There are two terms at use here: state as a TRIE_NODEIDX() which is a | |
1502 | number representing the first entry of the node, and state as a | |
1503 | TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and | |
1504 | TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there | |
1505 | are 2 entrys per node. eg: | |
1506 | ||
1507 | A B A B | |
1508 | 1. 2 4 1. 3 7 | |
1509 | 2. 0 3 3. 0 5 | |
1510 | 3. 0 0 5. 0 0 | |
1511 | 4. 0 0 7. 0 0 | |
1512 | ||
1513 | The table is internally in the right hand, idx form. However as we also | |
1514 | have to deal with the states array which is indexed by nodenum we have to | |
1515 | use TRIE_NODENUM() to convert. | |
1516 | ||
1517 | */ | |
1518 | ||
3dab1dad YO |
1519 | |
1520 | Newxz( trie->trans, ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1, | |
a3621e74 | 1521 | reg_trie_trans ); |
3dab1dad | 1522 | Newxz( trie->states, TRIE_CHARCOUNT(trie) + 2, reg_trie_state ); |
a3621e74 YO |
1523 | next_alloc = trie->uniquecharcount + 1; |
1524 | ||
3dab1dad | 1525 | |
a3621e74 YO |
1526 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
1527 | ||
c445ea15 | 1528 | regnode * const noper = NEXTOPER( cur ); |
a28509cc AL |
1529 | const U8 *uc = (U8*)STRING( noper ); |
1530 | const U8 * const e = uc + STR_LEN( noper ); | |
a3621e74 YO |
1531 | |
1532 | U32 state = 1; /* required init */ | |
1533 | ||
1534 | U16 charid = 0; /* sanity init */ | |
1535 | U32 accept_state = 0; /* sanity init */ | |
1536 | U8 *scan = (U8*)NULL; /* sanity init */ | |
1537 | ||
1538 | STRLEN foldlen = 0; /* required init */ | |
07be1b83 | 1539 | U32 wordlen = 0; /* required init */ |
a3621e74 YO |
1540 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
1541 | ||
3dab1dad | 1542 | if ( OP(noper) != NOTHING ) { |
a3621e74 YO |
1543 | for ( ; uc < e ; uc += len ) { |
1544 | ||
1545 | TRIE_READ_CHAR; | |
1546 | ||
1547 | if ( uvc < 256 ) { | |
1548 | charid = trie->charmap[ uvc ]; | |
1549 | } else { | |
c445ea15 AL |
1550 | SV* const * const svpp = hv_fetch( trie->widecharmap, (char*)&uvc, sizeof( UV ), 0); |
1551 | charid = svpp ? (U16)SvIV(*svpp) : 0; | |
a3621e74 YO |
1552 | } |
1553 | if ( charid ) { | |
1554 | charid--; | |
1555 | if ( !trie->trans[ state + charid ].next ) { | |
1556 | trie->trans[ state + charid ].next = next_alloc; | |
1557 | trie->trans[ state ].check++; | |
1558 | next_alloc += trie->uniquecharcount; | |
1559 | } | |
1560 | state = trie->trans[ state + charid ].next; | |
1561 | } else { | |
e4584336 | 1562 | Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc ); |
a3621e74 YO |
1563 | } |
1564 | /* charid is now 0 if we dont know the char read, or nonzero if we do */ | |
1565 | } | |
a3621e74 | 1566 | } |
3dab1dad YO |
1567 | accept_state = TRIE_NODENUM( state ); |
1568 | TRIE_HANDLE_WORD(accept_state); | |
a3621e74 YO |
1569 | |
1570 | } /* end second pass */ | |
1571 | ||
3dab1dad YO |
1572 | /* and now dump it out before we compress it */ |
1573 | DEBUG_TRIE_COMPILE_MORE_r( | |
1574 | dump_trie_interim_table(trie,next_alloc,depth+1) | |
1575 | ); | |
a3621e74 | 1576 | |
a3621e74 YO |
1577 | { |
1578 | /* | |
1579 | * Inplace compress the table.* | |
1580 | ||
1581 | For sparse data sets the table constructed by the trie algorithm will | |
1582 | be mostly 0/FAIL transitions or to put it another way mostly empty. | |
1583 | (Note that leaf nodes will not contain any transitions.) | |
1584 | ||
1585 | This algorithm compresses the tables by eliminating most such | |
1586 | transitions, at the cost of a modest bit of extra work during lookup: | |
1587 | ||
1588 | - Each states[] entry contains a .base field which indicates the | |
1589 | index in the state[] array wheres its transition data is stored. | |
1590 | ||
1591 | - If .base is 0 there are no valid transitions from that node. | |
1592 | ||
1593 | - If .base is nonzero then charid is added to it to find an entry in | |
1594 | the trans array. | |
1595 | ||
1596 | -If trans[states[state].base+charid].check!=state then the | |
1597 | transition is taken to be a 0/Fail transition. Thus if there are fail | |
1598 | transitions at the front of the node then the .base offset will point | |
1599 | somewhere inside the previous nodes data (or maybe even into a node | |
1600 | even earlier), but the .check field determines if the transition is | |
1601 | valid. | |
1602 | ||
1603 | The following process inplace converts the table to the compressed | |
1604 | table: We first do not compress the root node 1,and mark its all its | |
1605 | .check pointers as 1 and set its .base pointer as 1 as well. This | |
1606 | allows to do a DFA construction from the compressed table later, and | |
1607 | ensures that any .base pointers we calculate later are greater than | |
1608 | 0. | |
1609 | ||
1610 | - We set 'pos' to indicate the first entry of the second node. | |
1611 | ||
1612 | - We then iterate over the columns of the node, finding the first and | |
1613 | last used entry at l and m. We then copy l..m into pos..(pos+m-l), | |
1614 | and set the .check pointers accordingly, and advance pos | |
1615 | appropriately and repreat for the next node. Note that when we copy | |
1616 | the next pointers we have to convert them from the original | |
1617 | NODEIDX form to NODENUM form as the former is not valid post | |
1618 | compression. | |
1619 | ||
1620 | - If a node has no transitions used we mark its base as 0 and do not | |
1621 | advance the pos pointer. | |
1622 | ||
1623 | - If a node only has one transition we use a second pointer into the | |
1624 | structure to fill in allocated fail transitions from other states. | |
1625 | This pointer is independent of the main pointer and scans forward | |
1626 | looking for null transitions that are allocated to a state. When it | |
1627 | finds one it writes the single transition into the "hole". If the | |
1628 | pointer doesnt find one the single transition is appeneded as normal. | |
1629 | ||
1630 | - Once compressed we can Renew/realloc the structures to release the | |
1631 | excess space. | |
1632 | ||
1633 | See "Table-Compression Methods" in sec 3.9 of the Red Dragon, | |
1634 | specifically Fig 3.47 and the associated pseudocode. | |
1635 | ||
1636 | demq | |
1637 | */ | |
a3b680e6 | 1638 | const U32 laststate = TRIE_NODENUM( next_alloc ); |
a28509cc | 1639 | U32 state, charid; |
a3621e74 | 1640 | U32 pos = 0, zp=0; |
3dab1dad | 1641 | TRIE_LASTSTATE(trie) = laststate; |
a3621e74 YO |
1642 | |
1643 | for ( state = 1 ; state < laststate ; state++ ) { | |
1644 | U8 flag = 0; | |
a28509cc AL |
1645 | const U32 stateidx = TRIE_NODEIDX( state ); |
1646 | const U32 o_used = trie->trans[ stateidx ].check; | |
1647 | U32 used = trie->trans[ stateidx ].check; | |
a3621e74 YO |
1648 | trie->trans[ stateidx ].check = 0; |
1649 | ||
1650 | for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) { | |
1651 | if ( flag || trie->trans[ stateidx + charid ].next ) { | |
1652 | if ( trie->trans[ stateidx + charid ].next ) { | |
1653 | if (o_used == 1) { | |
1654 | for ( ; zp < pos ; zp++ ) { | |
1655 | if ( ! trie->trans[ zp ].next ) { | |
1656 | break; | |
1657 | } | |
1658 | } | |
1659 | trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ; | |
1660 | trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next ); | |
1661 | trie->trans[ zp ].check = state; | |
1662 | if ( ++zp > pos ) pos = zp; | |
1663 | break; | |
1664 | } | |
1665 | used--; | |
1666 | } | |
1667 | if ( !flag ) { | |
1668 | flag = 1; | |
1669 | trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ; | |
1670 | } | |
1671 | trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next ); | |
1672 | trie->trans[ pos ].check = state; | |
1673 | pos++; | |
1674 | } | |
1675 | } | |
1676 | } | |
cc601c31 | 1677 | trie->lasttrans = pos + 1; |
a3621e74 YO |
1678 | Renew( trie->states, laststate + 1, reg_trie_state); |
1679 | DEBUG_TRIE_COMPILE_MORE_r( | |
e4584336 | 1680 | PerlIO_printf( Perl_debug_log, |
3dab1dad YO |
1681 | "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n", |
1682 | (int)depth * 2 + 2,"", | |
1683 | (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ), | |
5d7488b2 AL |
1684 | (IV)next_alloc, |
1685 | (IV)pos, | |
a3621e74 YO |
1686 | ( ( next_alloc - pos ) * 100 ) / (double)next_alloc ); |
1687 | ); | |
1688 | ||
1689 | } /* end table compress */ | |
1690 | } | |
cc601c31 YO |
1691 | /* resize the trans array to remove unused space */ |
1692 | Renew( trie->trans, trie->lasttrans, reg_trie_trans); | |
a3621e74 | 1693 | |
3dab1dad YO |
1694 | /* and now dump out the compressed format */ |
1695 | DEBUG_TRIE_COMPILE_r( | |
1696 | dump_trie(trie,depth+1) | |
1697 | ); | |
07be1b83 | 1698 | |
3dab1dad YO |
1699 | { /* Modify the program and insert the new TRIE node*/ |
1700 | regnode *convert; | |
1701 | U8 nodetype =(U8)(flags & 0xFF); | |
1702 | char *str=NULL; | |
07be1b83 YO |
1703 | #ifdef DEBUGGING |
1704 | U32 mjd_offset; | |
1705 | U32 mjd_nodelen; | |
1706 | #endif | |
a3621e74 | 1707 | /* |
3dab1dad YO |
1708 | This means we convert either the first branch or the first Exact, |
1709 | depending on whether the thing following (in 'last') is a branch | |
1710 | or not and whther first is the startbranch (ie is it a sub part of | |
1711 | the alternation or is it the whole thing.) | |
1712 | Assuming its a sub part we conver the EXACT otherwise we convert | |
1713 | the whole branch sequence, including the first. | |
a3621e74 | 1714 | */ |
3dab1dad YO |
1715 | /* Find the node we are going to overwrite */ |
1716 | if ( first == startbranch && OP( last ) != BRANCH ) { | |
07be1b83 | 1717 | /* whole branch chain */ |
3dab1dad | 1718 | convert = first; |
07be1b83 YO |
1719 | DEBUG_r({ |
1720 | const regnode *nop = NEXTOPER( convert ); | |
1721 | mjd_offset= Node_Offset((nop)); | |
1722 | mjd_nodelen= Node_Length((nop)); | |
1723 | }); | |
1724 | } else { | |
1725 | /* branch sub-chain */ | |
3dab1dad YO |
1726 | convert = NEXTOPER( first ); |
1727 | NEXT_OFF( first ) = (U16)(last - first); | |
07be1b83 YO |
1728 | DEBUG_r({ |
1729 | mjd_offset= Node_Offset((convert)); | |
1730 | mjd_nodelen= Node_Length((convert)); | |
1731 | }); | |
1732 | } | |
1733 | DEBUG_OPTIMISE_r( | |
1734 | PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n", | |
1735 | (int)depth * 2 + 2, "", | |
1736 | mjd_offset,mjd_nodelen) | |
1737 | ); | |
a3621e74 | 1738 | |
3dab1dad YO |
1739 | /* But first we check to see if there is a common prefix we can |
1740 | split out as an EXACT and put in front of the TRIE node. */ | |
1741 | trie->startstate= 1; | |
1742 | if ( trie->bitmap && !trie->widecharmap ) { | |
1743 | U32 state; | |
1744 | DEBUG_OPTIMISE_r( | |
8e11feef RGS |
1745 | PerlIO_printf(Perl_debug_log, "%*sLaststate:%"UVuf"\n", |
1746 | (int)depth * 2 + 2, "", | |
1747 | TRIE_LASTSTATE(trie)) | |
1748 | ); | |
1749 | for ( state = 1 ; state < TRIE_LASTSTATE(trie)-1 ; state++ ) { | |
a3621e74 | 1750 | U32 ofs = 0; |
8e11feef RGS |
1751 | I32 idx = -1; |
1752 | U32 count = 0; | |
1753 | const U32 base = trie->states[ state ].trans.base; | |
a3621e74 | 1754 | |
3dab1dad | 1755 | if ( trie->states[state].wordnum ) |
8e11feef | 1756 | count = 1; |
a3621e74 | 1757 | |
8e11feef | 1758 | for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) { |
cc601c31 YO |
1759 | if ( ( base + ofs >= trie->uniquecharcount ) && |
1760 | ( base + ofs - trie->uniquecharcount < trie->lasttrans ) && | |
a3621e74 YO |
1761 | trie->trans[ base + ofs - trie->uniquecharcount ].check == state ) |
1762 | { | |
3dab1dad | 1763 | if ( ++count > 1 ) { |
8e11feef | 1764 | SV **tmp = av_fetch( TRIE_REVCHARMAP(trie), ofs, 0); |
07be1b83 | 1765 | const U8 *ch = (U8*)SvPV_nolen_const( *tmp ); |
8e11feef | 1766 | if ( state == 1 ) break; |
3dab1dad YO |
1767 | if ( count == 2 ) { |
1768 | Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char); | |
1769 | DEBUG_OPTIMISE_r( | |
8e11feef RGS |
1770 | PerlIO_printf(Perl_debug_log, |
1771 | "%*sNew Start State=%"UVuf" Class: [", | |
1772 | (int)depth * 2 + 2, "", | |
3dab1dad | 1773 | state)); |
be8e71aa YO |
1774 | if (idx >= 0) { |
1775 | SV ** const tmp = av_fetch( TRIE_REVCHARMAP(trie), idx, 0); | |
1776 | const U8 * const ch = (U8*)SvPV_nolen_const( *tmp ); | |
8e11feef | 1777 | |
3dab1dad | 1778 | TRIE_BITMAP_SET(trie,*ch); |
8e11feef RGS |
1779 | if ( folder ) |
1780 | TRIE_BITMAP_SET(trie, folder[ *ch ]); | |
3dab1dad | 1781 | DEBUG_OPTIMISE_r( |
07be1b83 | 1782 | PerlIO_printf(Perl_debug_log, (char*)ch) |
3dab1dad | 1783 | ); |
8e11feef RGS |
1784 | } |
1785 | } | |
1786 | TRIE_BITMAP_SET(trie,*ch); | |
1787 | if ( folder ) | |
1788 | TRIE_BITMAP_SET(trie,folder[ *ch ]); | |
1789 | DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch)); | |
1790 | } | |
1791 | idx = ofs; | |
1792 | } | |
3dab1dad YO |
1793 | } |
1794 | if ( count == 1 ) { | |
1795 | SV **tmp = av_fetch( TRIE_REVCHARMAP(trie), idx, 0); | |
8e11feef | 1796 | const char *ch = SvPV_nolen_const( *tmp ); |
3dab1dad | 1797 | DEBUG_OPTIMISE_r( |
8e11feef RGS |
1798 | PerlIO_printf( Perl_debug_log, |
1799 | "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n", | |
1800 | (int)depth * 2 + 2, "", | |
1801 | state, idx, ch) | |
3dab1dad YO |
1802 | ); |
1803 | if ( state==1 ) { | |
1804 | OP( convert ) = nodetype; | |
1805 | str=STRING(convert); | |
1806 | STR_LEN(convert)=0; | |
1807 | } | |
1808 | *str++=*ch; | |
1809 | STR_LEN(convert)++; | |
a3621e74 | 1810 | |
8e11feef | 1811 | } else { |
f9049ba1 | 1812 | #ifdef DEBUGGING |
8e11feef RGS |
1813 | if (state>1) |
1814 | DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n")); | |
f9049ba1 | 1815 | #endif |
8e11feef RGS |
1816 | break; |
1817 | } | |
1818 | } | |
3dab1dad | 1819 | if (str) { |
8e11feef | 1820 | regnode *n = convert+NODE_SZ_STR(convert); |
07be1b83 | 1821 | NEXT_OFF(convert) = NODE_SZ_STR(convert); |
8e11feef | 1822 | trie->startstate = state; |
07be1b83 YO |
1823 | trie->minlen -= (state - 1); |
1824 | trie->maxlen -= (state - 1); | |
1825 | DEBUG_r({ | |
1826 | regnode *fix = convert; | |
1827 | mjd_nodelen++; | |
1828 | Set_Node_Offset_Length(convert, mjd_offset, state - 1); | |
1829 | while( ++fix < n ) { | |
1830 | Set_Node_Offset_Length(fix, 0, 0); | |
1831 | } | |
1832 | }); | |
8e11feef RGS |
1833 | if (trie->maxlen) { |
1834 | convert = n; | |
1835 | } else { | |
3dab1dad YO |
1836 | NEXT_OFF(convert) = (U16)(tail - convert); |
1837 | } | |
1838 | } | |
1839 | } | |
1840 | if ( trie->maxlen ) { | |
1841 | OP( convert ) = TRIE; | |
8e11feef RGS |
1842 | NEXT_OFF( convert ) = (U16)(tail - convert); |
1843 | ARG_SET( convert, data_slot ); | |
a3621e74 | 1844 | |
3dab1dad YO |
1845 | /* store the type in the flags */ |
1846 | convert->flags = nodetype; | |
1847 | /* XXX We really should free up the resource in trie now, as we wont use them */ | |
1848 | } | |
a3621e74 YO |
1849 | /* needed for dumping*/ |
1850 | DEBUG_r({ | |
1851 | regnode *optimize = convert + NODE_STEP_REGNODE + regarglen[ TRIE ]; | |
07be1b83 YO |
1852 | regnode *opt = convert; |
1853 | while (++opt<optimize) { | |
1854 | Set_Node_Offset_Length(opt,0,0); | |
1855 | } | |
a3621e74 YO |
1856 | /* We now need to mark all of the space originally used by the |
1857 | branches as optimized away. This keeps the dumpuntil from | |
1858 | throwing a wobbly as it doesnt use regnext() to traverse the | |
1859 | opcodes. | |
07be1b83 | 1860 | We also "fix" the offsets |
a3621e74 YO |
1861 | */ |
1862 | while( optimize < last ) { | |
07be1b83 | 1863 | mjd_nodelen += Node_Length((optimize)); |
a3621e74 | 1864 | OP( optimize ) = OPTIMIZED; |
07be1b83 | 1865 | Set_Node_Offset_Length(optimize,0,0); |
a3621e74 YO |
1866 | optimize++; |
1867 | } | |
07be1b83 | 1868 | Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen); |
a3621e74 YO |
1869 | }); |
1870 | } /* end node insert */ | |
07be1b83 | 1871 | #ifndef DEBUGGING |
6e8b4190 | 1872 | SvREFCNT_dec(TRIE_REVCHARMAP(trie)); |
07be1b83 | 1873 | #endif |
a3621e74 YO |
1874 | return 1; |
1875 | } | |
1876 | ||
a3621e74 | 1877 | /* |
5d1c421c JH |
1878 | * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2. |
1879 | * These need to be revisited when a newer toolchain becomes available. | |
1880 | */ | |
1881 | #if defined(__sparc64__) && defined(__GNUC__) | |
1882 | # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96) | |
1883 | # undef SPARC64_GCC_WORKAROUND | |
1884 | # define SPARC64_GCC_WORKAROUND 1 | |
1885 | # endif | |
1886 | #endif | |
1887 | ||
07be1b83 YO |
1888 | #define DEBUG_PEEP(str,scan,depth) \ |
1889 | DEBUG_OPTIMISE_r({ \ | |
1890 | SV * const mysv=sv_newmortal(); \ | |
1891 | regnode *Next = regnext(scan); \ | |
1892 | regprop(RExC_rx, mysv, scan); \ | |
1893 | PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s [%d]\n", \ | |
1894 | (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\ | |
1895 | Next ? (REG_NODE_NUM(Next)) : 0 ); \ | |
1896 | }); | |
1897 | ||
1898 | #define JOIN_EXACT(scan,min,flags) \ | |
1899 | if (PL_regkind[OP(scan)] == EXACT) \ | |
1900 | join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1) | |
1901 | ||
be8e71aa | 1902 | STATIC U32 |
07be1b83 YO |
1903 | S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) { |
1904 | /* Merge several consecutive EXACTish nodes into one. */ | |
1905 | regnode *n = regnext(scan); | |
1906 | U32 stringok = 1; | |
1907 | regnode *next = scan + NODE_SZ_STR(scan); | |
1908 | U32 merged = 0; | |
1909 | U32 stopnow = 0; | |
1910 | #ifdef DEBUGGING | |
1911 | regnode *stop = scan; | |
72f13be8 | 1912 | GET_RE_DEBUG_FLAGS_DECL; |
f9049ba1 | 1913 | #else |
d47053eb RGS |
1914 | PERL_UNUSED_ARG(depth); |
1915 | #endif | |
1916 | #ifndef EXPERIMENTAL_INPLACESCAN | |
f9049ba1 SP |
1917 | PERL_UNUSED_ARG(flags); |
1918 | PERL_UNUSED_ARG(val); | |
07be1b83 | 1919 | #endif |
07be1b83 YO |
1920 | DEBUG_PEEP("join",scan,depth); |
1921 | ||
1922 | /* Skip NOTHING, merge EXACT*. */ | |
1923 | while (n && | |
1924 | ( PL_regkind[OP(n)] == NOTHING || | |
1925 | (stringok && (OP(n) == OP(scan)))) | |
1926 | && NEXT_OFF(n) | |
1927 | && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) { | |
1928 | ||
1929 | if (OP(n) == TAIL || n > next) | |
1930 | stringok = 0; | |
1931 | if (PL_regkind[OP(n)] == NOTHING) { | |
07be1b83 YO |
1932 | DEBUG_PEEP("skip:",n,depth); |
1933 | NEXT_OFF(scan) += NEXT_OFF(n); | |
1934 | next = n + NODE_STEP_REGNODE; | |
1935 | #ifdef DEBUGGING | |
1936 | if (stringok) | |
1937 | stop = n; | |
1938 | #endif | |
1939 | n = regnext(n); | |
1940 | } | |
1941 | else if (stringok) { | |
1942 | const int oldl = STR_LEN(scan); | |
1943 | regnode * const nnext = regnext(n); | |
1944 | ||
1945 | DEBUG_PEEP("merg",n,depth); | |
1946 | ||
1947 | merged++; | |
1948 | if (oldl + STR_LEN(n) > U8_MAX) | |
1949 | break; | |
1950 | NEXT_OFF(scan) += NEXT_OFF(n); | |
1951 | STR_LEN(scan) += STR_LEN(n); | |
1952 | next = n + NODE_SZ_STR(n); | |
1953 | /* Now we can overwrite *n : */ | |
1954 | Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char); | |
1955 | #ifdef DEBUGGING | |
1956 | stop = next - 1; | |
1957 | #endif | |
1958 | n = nnext; | |
1959 | if (stopnow) break; | |
1960 | } | |
1961 | ||
d47053eb RGS |
1962 | #ifdef EXPERIMENTAL_INPLACESCAN |
1963 | if (flags && !NEXT_OFF(n)) { | |
1964 | DEBUG_PEEP("atch", val, depth); | |
1965 | if (reg_off_by_arg[OP(n)]) { | |
1966 | ARG_SET(n, val - n); | |
1967 | } | |
1968 | else { | |
1969 | NEXT_OFF(n) = val - n; | |
1970 | } | |
1971 | stopnow = 1; | |
1972 | } | |
07be1b83 YO |
1973 | #endif |
1974 | } | |
1975 | ||
1976 | if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) { | |
1977 | /* | |
1978 | Two problematic code points in Unicode casefolding of EXACT nodes: | |
1979 | ||
1980 | U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS | |
1981 | U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS | |
1982 | ||
1983 | which casefold to | |
1984 | ||
1985 | Unicode UTF-8 | |
1986 | ||
1987 | U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81 | |
1988 | U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81 | |
1989 | ||
1990 | This means that in case-insensitive matching (or "loose matching", | |
1991 | as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte | |
1992 | length of the above casefolded versions) can match a target string | |
1993 | of length two (the byte length of UTF-8 encoded U+0390 or U+03B0). | |
1994 | This would rather mess up the minimum length computation. | |
1995 | ||
1996 | What we'll do is to look for the tail four bytes, and then peek | |
1997 | at the preceding two bytes to see whether we need to decrease | |
1998 | the minimum length by four (six minus two). | |
1999 | ||
2000 | Thanks to the design of UTF-8, there cannot be false matches: | |
2001 | A sequence of valid UTF-8 bytes cannot be a subsequence of | |
2002 | another valid sequence of UTF-8 bytes. | |
2003 | ||
2004 | */ | |
2005 | char * const s0 = STRING(scan), *s, *t; | |
2006 | char * const s1 = s0 + STR_LEN(scan) - 1; | |
2007 | char * const s2 = s1 - 4; | |
2008 | const char t0[] = "\xcc\x88\xcc\x81"; | |
2009 | const char * const t1 = t0 + 3; | |
2010 | ||
2011 | for (s = s0 + 2; | |
2012 | s < s2 && (t = ninstr(s, s1, t0, t1)); | |
2013 | s = t + 4) { | |
2014 | if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) || | |
2015 | ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF)) | |
2016 | *min -= 4; | |
2017 | } | |
2018 | } | |
2019 | ||
2020 | #ifdef DEBUGGING | |
2021 | /* Allow dumping */ | |
2022 | n = scan + NODE_SZ_STR(scan); | |
2023 | while (n <= stop) { | |
2024 | if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) { | |
2025 | OP(n) = OPTIMIZED; | |
2026 | NEXT_OFF(n) = 0; | |
2027 | } | |
2028 | n++; | |
2029 | } | |
2030 | #endif | |
2031 | DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)}); | |
2032 | return stopnow; | |
2033 | } | |
2034 | ||
653099ff GS |
2035 | /* REx optimizer. Converts nodes into quickier variants "in place". |
2036 | Finds fixed substrings. */ | |
2037 | ||
a0288114 | 2038 | /* Stops at toplevel WHILEM as well as at "last". At end *scanp is set |
c277df42 IZ |
2039 | to the position after last scanned or to NULL. */ |
2040 | ||
07be1b83 YO |
2041 | |
2042 | ||
76e3520e | 2043 | STATIC I32 |
9a957fbc AL |
2044 | S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp, I32 *deltap, |
2045 | regnode *last, scan_data_t *data, U32 flags, U32 depth) | |
c277df42 IZ |
2046 | /* scanp: Start here (read-write). */ |
2047 | /* deltap: Write maxlen-minlen here. */ | |
2048 | /* last: Stop before this one. */ | |
2049 | { | |
97aff369 | 2050 | dVAR; |
c277df42 IZ |
2051 | I32 min = 0, pars = 0, code; |
2052 | regnode *scan = *scanp, *next; | |
2053 | I32 delta = 0; | |
2054 | int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF); | |
aca2d497 | 2055 | int is_inf_internal = 0; /* The studied chunk is infinite */ |
c277df42 IZ |
2056 | I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0; |
2057 | scan_data_t data_fake; | |
653099ff | 2058 | struct regnode_charclass_class and_with; /* Valid if flags & SCF_DO_STCLASS_OR */ |
a3621e74 YO |
2059 | SV *re_trie_maxbuff = NULL; |
2060 | ||
2061 | GET_RE_DEBUG_FLAGS_DECL; | |
13a24bad YO |
2062 | #ifdef DEBUGGING |
2063 | StructCopy(&zero_scan_data, &data_fake, scan_data_t); | |
2064 | #endif | |
b81d288d | 2065 | |
c277df42 IZ |
2066 | while (scan && OP(scan) != END && scan < last) { |
2067 | /* Peephole optimizer: */ | |
07be1b83 | 2068 | DEBUG_PEEP("Peep",scan,depth); |
a3621e74 | 2069 | |
07be1b83 | 2070 | JOIN_EXACT(scan,&min,0); |
a3621e74 | 2071 | |
653099ff GS |
2072 | /* Follow the next-chain of the current node and optimize |
2073 | away all the NOTHINGs from it. */ | |
c277df42 | 2074 | if (OP(scan) != CURLYX) { |
a3b680e6 | 2075 | const int max = (reg_off_by_arg[OP(scan)] |
048cfca1 GS |
2076 | ? I32_MAX |
2077 | /* I32 may be smaller than U16 on CRAYs! */ | |
2078 | : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX)); | |
c277df42 IZ |
2079 | int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan)); |
2080 | int noff; | |
2081 | regnode *n = scan; | |
b81d288d | 2082 | |
c277df42 IZ |
2083 | /* Skip NOTHING and LONGJMP. */ |
2084 | while ((n = regnext(n)) | |
3dab1dad | 2085 | && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n))) |
c277df42 IZ |
2086 | || ((OP(n) == LONGJMP) && (noff = ARG(n)))) |
2087 | && off + noff < max) | |
2088 | off += noff; | |
2089 | if (reg_off_by_arg[OP(scan)]) | |
2090 | ARG(scan) = off; | |
b81d288d | 2091 | else |
c277df42 IZ |
2092 | NEXT_OFF(scan) = off; |
2093 | } | |
a3621e74 | 2094 | |
07be1b83 | 2095 | |
3dab1dad | 2096 | |
653099ff GS |
2097 | /* The principal pseudo-switch. Cannot be a switch, since we |
2098 | look into several different things. */ | |
b81d288d | 2099 | if (OP(scan) == BRANCH || OP(scan) == BRANCHJ |
c277df42 IZ |
2100 | || OP(scan) == IFTHEN || OP(scan) == SUSPEND) { |
2101 | next = regnext(scan); | |
2102 | code = OP(scan); | |
a3621e74 | 2103 | /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */ |
b81d288d AB |
2104 | |
2105 | if (OP(next) == code || code == IFTHEN || code == SUSPEND) { | |
c277df42 | 2106 | I32 max1 = 0, min1 = I32_MAX, num = 0; |
653099ff | 2107 | struct regnode_charclass_class accum; |
d4c19fe8 | 2108 | regnode * const startbranch=scan; |
c277df42 | 2109 | |
653099ff | 2110 | if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */ |
830247a4 | 2111 | scan_commit(pRExC_state, data); /* Cannot merge strings after this. */ |
653099ff | 2112 | if (flags & SCF_DO_STCLASS) |
830247a4 | 2113 | cl_init_zero(pRExC_state, &accum); |
a3621e74 | 2114 | |
c277df42 | 2115 | while (OP(scan) == code) { |
830247a4 | 2116 | I32 deltanext, minnext, f = 0, fake; |
653099ff | 2117 | struct regnode_charclass_class this_class; |
c277df42 IZ |
2118 | |
2119 | num++; | |
2120 | data_fake.flags = 0; | |
b81d288d | 2121 | if (data) { |
2c2d71f5 | 2122 | data_fake.whilem_c = data->whilem_c; |
cb434fcc IZ |
2123 | data_fake.last_closep = data->last_closep; |
2124 | } | |
2125 | else | |
2126 | data_fake.last_closep = &fake; | |
c277df42 IZ |
2127 | next = regnext(scan); |
2128 | scan = NEXTOPER(scan); | |
2129 | if (code != BRANCH) | |
2130 | scan = NEXTOPER(scan); | |
653099ff | 2131 | if (flags & SCF_DO_STCLASS) { |
830247a4 | 2132 | cl_init(pRExC_state, &this_class); |
653099ff GS |
2133 | data_fake.start_class = &this_class; |
2134 | f = SCF_DO_STCLASS_AND; | |
b81d288d | 2135 | } |
e1901655 IZ |
2136 | if (flags & SCF_WHILEM_VISITED_POS) |
2137 | f |= SCF_WHILEM_VISITED_POS; | |
a3621e74 | 2138 | |
653099ff | 2139 | /* we suppose the run is continuous, last=next...*/ |
830247a4 | 2140 | minnext = study_chunk(pRExC_state, &scan, &deltanext, |
a3621e74 | 2141 | next, &data_fake, f,depth+1); |
b81d288d | 2142 | if (min1 > minnext) |
c277df42 IZ |
2143 | min1 = minnext; |
2144 | if (max1 < minnext + deltanext) | |
2145 | max1 = minnext + deltanext; | |
2146 | if (deltanext == I32_MAX) | |
aca2d497 | 2147 | is_inf = is_inf_internal = 1; |
c277df42 IZ |
2148 | scan = next; |
2149 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
2150 | pars++; | |
3dab1dad YO |
2151 | if (data) { |
2152 | if (data_fake.flags & SF_HAS_EVAL) | |
07be1b83 | 2153 | data->flags |= SF_HAS_EVAL; |
2c2d71f5 | 2154 | data->whilem_c = data_fake.whilem_c; |
3dab1dad | 2155 | } |
653099ff | 2156 | if (flags & SCF_DO_STCLASS) |
830247a4 | 2157 | cl_or(pRExC_state, &accum, &this_class); |
b81d288d | 2158 | if (code == SUSPEND) |
c277df42 IZ |
2159 | break; |
2160 | } | |
2161 | if (code == IFTHEN && num < 2) /* Empty ELSE branch */ | |
2162 | min1 = 0; | |
2163 | if (flags & SCF_DO_SUBSTR) { | |
2164 | data->pos_min += min1; | |
2165 | data->pos_delta += max1 - min1; | |
2166 | if (max1 != min1 || is_inf) | |
2167 | data->longest = &(data->longest_float); | |
2168 | } | |
2169 | min += min1; | |
2170 | delta += max1 - min1; | |
653099ff | 2171 | if (flags & SCF_DO_STCLASS_OR) { |
830247a4 | 2172 | cl_or(pRExC_state, data->start_class, &accum); |
653099ff GS |
2173 | if (min1) { |
2174 | cl_and(data->start_class, &and_with); | |
2175 | flags &= ~SCF_DO_STCLASS; | |
2176 | } | |
2177 | } | |
2178 | else if (flags & SCF_DO_STCLASS_AND) { | |
de0c8cb8 GS |
2179 | if (min1) { |
2180 | cl_and(data->start_class, &accum); | |
653099ff | 2181 | flags &= ~SCF_DO_STCLASS; |
de0c8cb8 GS |
2182 | } |
2183 | else { | |
b81d288d | 2184 | /* Switch to OR mode: cache the old value of |
de0c8cb8 GS |
2185 | * data->start_class */ |
2186 | StructCopy(data->start_class, &and_with, | |
2187 | struct regnode_charclass_class); | |
2188 | flags &= ~SCF_DO_STCLASS_AND; | |
2189 | StructCopy(&accum, data->start_class, | |
2190 | struct regnode_charclass_class); | |
2191 | flags |= SCF_DO_STCLASS_OR; | |
2192 | data->start_class->flags |= ANYOF_EOS; | |
2193 | } | |
653099ff | 2194 | } |
a3621e74 YO |
2195 | |
2196 | /* demq. | |
2197 | ||
2198 | Assuming this was/is a branch we are dealing with: 'scan' now | |
2199 | points at the item that follows the branch sequence, whatever | |
2200 | it is. We now start at the beginning of the sequence and look | |
2201 | for subsequences of | |
2202 | ||
2203 | BRANCH->EXACT=>X | |
2204 | BRANCH->EXACT=>X | |
2205 | ||
2206 | which would be constructed from a pattern like /A|LIST|OF|WORDS/ | |
2207 | ||
2208 | If we can find such a subseqence we need to turn the first | |
2209 | element into a trie and then add the subsequent branch exact | |
2210 | strings to the trie. | |
2211 | ||
2212 | We have two cases | |
2213 | ||
2214 | 1. patterns where the whole set of branch can be converted to a trie, | |
2215 | ||
2216 | 2. patterns where only a subset of the alternations can be | |
2217 | converted to a trie. | |
2218 | ||
2219 | In case 1 we can replace the whole set with a single regop | |
2220 | for the trie. In case 2 we need to keep the start and end | |
2221 | branchs so | |
2222 | ||
2223 | 'BRANCH EXACT; BRANCH EXACT; BRANCH X' | |
2224 | becomes BRANCH TRIE; BRANCH X; | |
2225 | ||
2226 | Hypthetically when we know the regex isnt anchored we can | |
2227 | turn a case 1 into a DFA and let it rip... Every time it finds a match | |
2228 | it would just call its tail, no WHILEM/CURLY needed. | |
2229 | ||
2230 | */ | |
07be1b83 | 2231 | if (PERL_ENABLE_TRIE_OPTIMISATION) { |
3dab1dad | 2232 | int made=0; |
0111c4fd RGS |
2233 | if (!re_trie_maxbuff) { |
2234 | re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1); | |
2235 | if (!SvIOK(re_trie_maxbuff)) | |
2236 | sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT); | |
2237 | } | |
a3621e74 YO |
2238 | if ( SvIV(re_trie_maxbuff)>=0 && OP( startbranch )==BRANCH ) { |
2239 | regnode *cur; | |
2240 | regnode *first = (regnode *)NULL; | |
2241 | regnode *last = (regnode *)NULL; | |
2242 | regnode *tail = scan; | |
2243 | U8 optype = 0; | |
2244 | U32 count=0; | |
2245 | ||
2246 | #ifdef DEBUGGING | |
c445ea15 | 2247 | SV * const mysv = sv_newmortal(); /* for dumping */ |
a3621e74 YO |
2248 | #endif |
2249 | /* var tail is used because there may be a TAIL | |
2250 | regop in the way. Ie, the exacts will point to the | |
2251 | thing following the TAIL, but the last branch will | |
2252 | point at the TAIL. So we advance tail. If we | |
2253 | have nested (?:) we may have to move through several | |
2254 | tails. | |
2255 | */ | |
2256 | ||
2257 | while ( OP( tail ) == TAIL ) { | |
2258 | /* this is the TAIL generated by (?:) */ | |
2259 | tail = regnext( tail ); | |
2260 | } | |
2261 | ||
3dab1dad | 2262 | |
a3621e74 | 2263 | DEBUG_OPTIMISE_r({ |
32fc9b6a | 2264 | regprop(RExC_rx, mysv, tail ); |
3dab1dad YO |
2265 | PerlIO_printf( Perl_debug_log, "%*s%s%s\n", |
2266 | (int)depth * 2 + 2, "", | |
2267 | "Looking for TRIE'able sequences. Tail node is: ", | |
2268 | SvPV_nolen_const( mysv ) | |
a3621e74 YO |
2269 | ); |
2270 | }); | |
3dab1dad | 2271 | |
a3621e74 YO |
2272 | /* |
2273 | ||
2274 | step through the branches, cur represents each | |
2275 | branch, noper is the first thing to be matched | |
2276 | as part of that branch and noper_next is the | |
2277 | regnext() of that node. if noper is an EXACT | |
2278 | and noper_next is the same as scan (our current | |
2279 | position in the regex) then the EXACT branch is | |
2280 | a possible optimization target. Once we have | |
2281 | two or more consequetive such branches we can | |
2282 | create a trie of the EXACT's contents and stich | |
2283 | it in place. If the sequence represents all of | |
2284 | the branches we eliminate the whole thing and | |
2285 | replace it with a single TRIE. If it is a | |
2286 | subsequence then we need to stitch it in. This | |
2287 | means the first branch has to remain, and needs | |
2288 | to be repointed at the item on the branch chain | |
2289 | following the last branch optimized. This could | |
2290 | be either a BRANCH, in which case the | |
2291 | subsequence is internal, or it could be the | |
2292 | item following the branch sequence in which | |
2293 | case the subsequence is at the end. | |
2294 | ||
2295 | */ | |
2296 | ||
2297 | /* dont use tail as the end marker for this traverse */ | |
2298 | for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) { | |
aec46f14 AL |
2299 | regnode * const noper = NEXTOPER( cur ); |
2300 | regnode * const noper_next = regnext( noper ); | |
a3621e74 | 2301 | |
a3621e74 | 2302 | DEBUG_OPTIMISE_r({ |
32fc9b6a | 2303 | regprop(RExC_rx, mysv, cur); |
3dab1dad YO |
2304 | PerlIO_printf( Perl_debug_log, "%*s- %s (%d)", |
2305 | (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) ); | |
a3621e74 | 2306 | |
32fc9b6a | 2307 | regprop(RExC_rx, mysv, noper); |
a3621e74 | 2308 | PerlIO_printf( Perl_debug_log, " -> %s", |
cfd0369c | 2309 | SvPV_nolen_const(mysv)); |
a3621e74 YO |
2310 | |
2311 | if ( noper_next ) { | |
32fc9b6a | 2312 | regprop(RExC_rx, mysv, noper_next ); |
a3621e74 | 2313 | PerlIO_printf( Perl_debug_log,"\t=> %s\t", |
cfd0369c | 2314 | SvPV_nolen_const(mysv)); |
a3621e74 | 2315 | } |
3dab1dad YO |
2316 | PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n", |
2317 | REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) ); | |
a3621e74 | 2318 | }); |
3dab1dad YO |
2319 | if ( (((first && optype!=NOTHING) ? OP( noper ) == optype |
2320 | : PL_regkind[ OP( noper ) ] == EXACT ) | |
2321 | || OP(noper) == NOTHING ) | |
a3621e74 YO |
2322 | && noper_next == tail && count<U16_MAX) |
2323 | { | |
2324 | count++; | |
3dab1dad YO |
2325 | if ( !first || optype == NOTHING ) { |
2326 | if (!first) first = cur; | |
a3621e74 YO |
2327 | optype = OP( noper ); |
2328 | } else { | |
a3621e74 | 2329 | last = cur; |
a3621e74 YO |
2330 | } |
2331 | } else { | |
2332 | if ( last ) { | |
3dab1dad | 2333 | made+=make_trie( pRExC_state, startbranch, first, cur, tail, optype, depth+1 ); |
a3621e74 | 2334 | } |
3dab1dad | 2335 | if ( PL_regkind[ OP( noper ) ] == EXACT |
a3621e74 YO |
2336 | && noper_next == tail ) |
2337 | { | |
2338 | count = 1; | |
2339 | first = cur; | |
2340 | optype = OP( noper ); | |
2341 | } else { | |
2342 | count = 0; | |
2343 | first = NULL; | |
2344 | optype = 0; | |
2345 | } | |
2346 | last = NULL; | |
2347 | } | |
2348 | } | |
2349 | DEBUG_OPTIMISE_r({ | |
32fc9b6a | 2350 | regprop(RExC_rx, mysv, cur); |
a3621e74 | 2351 | PerlIO_printf( Perl_debug_log, |
3dab1dad YO |
2352 | "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2, |
2353 | "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur)); | |
a3621e74 YO |
2354 | |
2355 | }); | |
2356 | if ( last ) { | |
3dab1dad YO |
2357 | made+= make_trie( pRExC_state, startbranch, first, scan, tail, optype, depth+1 ); |
2358 | #ifdef TRIE_STUDY_OPT | |
07be1b83 YO |
2359 | if ( made && startbranch == first ) { |
2360 | if ( OP(first)!=TRIE ) | |
2361 | flags |= SCF_EXACT_TRIE; | |
2362 | else { | |
2363 | regnode *chk=*scanp; | |
2364 | while ( OP( chk ) == OPEN ) | |
2365 | chk = regnext( chk ); | |
2366 | if (chk==first) | |
2367 | flags |= SCF_EXACT_TRIE; | |
2368 | } | |
2369 | } | |
3dab1dad | 2370 | #endif |
07be1b83 | 2371 | } |
a3621e74 | 2372 | } |
3dab1dad YO |
2373 | |
2374 | } /* do trie */ | |
a0ed51b3 | 2375 | } |
a3621e74 | 2376 | else if ( code == BRANCHJ ) { /* single branch is optimized. */ |
c277df42 | 2377 | scan = NEXTOPER(NEXTOPER(scan)); |
a3621e74 | 2378 | } else /* single branch is optimized. */ |
c277df42 IZ |
2379 | scan = NEXTOPER(scan); |
2380 | continue; | |
a0ed51b3 LW |
2381 | } |
2382 | else if (OP(scan) == EXACT) { | |
cd439c50 | 2383 | I32 l = STR_LEN(scan); |
c445ea15 | 2384 | UV uc; |
a0ed51b3 | 2385 | if (UTF) { |
a3b680e6 | 2386 | const U8 * const s = (U8*)STRING(scan); |
1aa99e6b | 2387 | l = utf8_length(s, s + l); |
9041c2e3 | 2388 | uc = utf8_to_uvchr(s, NULL); |
c445ea15 AL |
2389 | } else { |
2390 | uc = *((U8*)STRING(scan)); | |
a0ed51b3 LW |
2391 | } |
2392 | min += l; | |
c277df42 | 2393 | if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */ |
c277df42 IZ |
2394 | /* The code below prefers earlier match for fixed |
2395 | offset, later match for variable offset. */ | |
2396 | if (data->last_end == -1) { /* Update the start info. */ | |
2397 | data->last_start_min = data->pos_min; | |
2398 | data->last_start_max = is_inf | |
b81d288d | 2399 | ? I32_MAX : data->pos_min + data->pos_delta; |
c277df42 | 2400 | } |
cd439c50 | 2401 | sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan)); |
45f47268 NC |
2402 | if (UTF) |
2403 | SvUTF8_on(data->last_found); | |
0eda9292 | 2404 | { |
9a957fbc | 2405 | SV * const sv = data->last_found; |
a28509cc | 2406 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? |
0eda9292 JH |
2407 | mg_find(sv, PERL_MAGIC_utf8) : NULL; |
2408 | if (mg && mg->mg_len >= 0) | |
5e43f467 JH |
2409 | mg->mg_len += utf8_length((U8*)STRING(scan), |
2410 | (U8*)STRING(scan)+STR_LEN(scan)); | |
0eda9292 | 2411 | } |
c277df42 IZ |
2412 | data->last_end = data->pos_min + l; |
2413 | data->pos_min += l; /* As in the first entry. */ | |
2414 | data->flags &= ~SF_BEFORE_EOL; | |
2415 | } | |
653099ff GS |
2416 | if (flags & SCF_DO_STCLASS_AND) { |
2417 | /* Check whether it is compatible with what we know already! */ | |
2418 | int compat = 1; | |
2419 | ||
1aa99e6b | 2420 | if (uc >= 0x100 || |
516a5887 | 2421 | (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE)) |
1aa99e6b | 2422 | && !ANYOF_BITMAP_TEST(data->start_class, uc) |
653099ff | 2423 | && (!(data->start_class->flags & ANYOF_FOLD) |
1aa99e6b | 2424 | || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc]))) |
516a5887 | 2425 | ) |
653099ff GS |
2426 | compat = 0; |
2427 | ANYOF_CLASS_ZERO(data->start_class); | |
2428 | ANYOF_BITMAP_ZERO(data->start_class); | |
2429 | if (compat) | |
1aa99e6b | 2430 | ANYOF_BITMAP_SET(data->start_class, uc); |
653099ff | 2431 | data->start_class->flags &= ~ANYOF_EOS; |
9b877dbb IH |
2432 | if (uc < 0x100) |
2433 | data->start_class->flags &= ~ANYOF_UNICODE_ALL; | |
653099ff GS |
2434 | } |
2435 | else if (flags & SCF_DO_STCLASS_OR) { | |
2436 | /* false positive possible if the class is case-folded */ | |
1aa99e6b | 2437 | if (uc < 0x100) |
9b877dbb IH |
2438 | ANYOF_BITMAP_SET(data->start_class, uc); |
2439 | else | |
2440 | data->start_class->flags |= ANYOF_UNICODE_ALL; | |
653099ff GS |
2441 | data->start_class->flags &= ~ANYOF_EOS; |
2442 | cl_and(data->start_class, &and_with); | |
2443 | } | |
2444 | flags &= ~SCF_DO_STCLASS; | |
a0ed51b3 | 2445 | } |
3dab1dad | 2446 | else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */ |
cd439c50 | 2447 | I32 l = STR_LEN(scan); |
1aa99e6b | 2448 | UV uc = *((U8*)STRING(scan)); |
653099ff GS |
2449 | |
2450 | /* Search for fixed substrings supports EXACT only. */ | |
ecaa9b9c NC |
2451 | if (flags & SCF_DO_SUBSTR) { |
2452 | assert(data); | |
830247a4 | 2453 | scan_commit(pRExC_state, data); |
ecaa9b9c | 2454 | } |
a0ed51b3 | 2455 | if (UTF) { |
6136c704 | 2456 | const U8 * const s = (U8 *)STRING(scan); |
1aa99e6b | 2457 | l = utf8_length(s, s + l); |
9041c2e3 | 2458 | uc = utf8_to_uvchr(s, NULL); |
a0ed51b3 LW |
2459 | } |
2460 | min += l; | |
ecaa9b9c | 2461 | if (flags & SCF_DO_SUBSTR) |
a0ed51b3 | 2462 | data->pos_min += l; |
653099ff GS |
2463 | if (flags & SCF_DO_STCLASS_AND) { |
2464 | /* Check whether it is compatible with what we know already! */ | |
2465 | int compat = 1; | |
2466 | ||
1aa99e6b | 2467 | if (uc >= 0x100 || |
516a5887 | 2468 | (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE)) |
1aa99e6b | 2469 | && !ANYOF_BITMAP_TEST(data->start_class, uc) |
516a5887 | 2470 | && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc]))) |
653099ff GS |
2471 | compat = 0; |
2472 | ANYOF_CLASS_ZERO(data->start_class); | |
2473 | ANYOF_BITMAP_ZERO(data->start_class); | |
2474 | if (compat) { | |
1aa99e6b | 2475 | ANYOF_BITMAP_SET(data->start_class, uc); |
653099ff GS |
2476 | data->start_class->flags &= ~ANYOF_EOS; |
2477 | data->start_class->flags |= ANYOF_FOLD; | |
2478 | if (OP(scan) == EXACTFL) | |
2479 | data->start_class->flags |= ANYOF_LOCALE; | |
2480 | } | |
2481 | } | |
2482 | else if (flags & SCF_DO_STCLASS_OR) { | |
2483 | if (data->start_class->flags & ANYOF_FOLD) { | |
2484 | /* false positive possible if the class is case-folded. | |
2485 | Assume that the locale settings are the same... */ | |
1aa99e6b IH |
2486 | if (uc < 0x100) |
2487 | ANYOF_BITMAP_SET(data->start_class, uc); | |
653099ff GS |
2488 | data->start_class->flags &= ~ANYOF_EOS; |
2489 | } | |
2490 | cl_and(data->start_class, &and_with); | |
2491 | } | |
2492 | flags &= ~SCF_DO_STCLASS; | |
a0ed51b3 | 2493 | } |
3dab1dad YO |
2494 | #ifdef TRIE_STUDY_OPT |
2495 | else if (OP(scan) == TRIE) { | |
2496 | reg_trie_data *trie=RExC_rx->data->data[ ARG(scan) ]; | |
2497 | min += trie->minlen; | |
07be1b83 | 2498 | delta += (trie->maxlen - trie->minlen); |
3dab1dad YO |
2499 | flags &= ~SCF_DO_STCLASS; /* xxx */ |
2500 | if (flags & SCF_DO_SUBSTR) { | |
2501 | scan_commit(pRExC_state,data); /* Cannot expect anything... */ | |
2502 | data->pos_min += trie->minlen; | |
07be1b83 YO |
2503 | data->pos_delta += (trie->maxlen - trie->minlen); |
2504 | if (trie->maxlen != trie->minlen) | |
2505 | data->longest = &(data->longest_float); | |
3dab1dad YO |
2506 | } |
2507 | } | |
2508 | #endif | |
bfed75c6 | 2509 | else if (strchr((const char*)PL_varies,OP(scan))) { |
9c5ffd7c | 2510 | I32 mincount, maxcount, minnext, deltanext, fl = 0; |
aa7a4b56 | 2511 | I32 f = flags, pos_before = 0; |
d4c19fe8 | 2512 | regnode * const oscan = scan; |
653099ff GS |
2513 | struct regnode_charclass_class this_class; |
2514 | struct regnode_charclass_class *oclass = NULL; | |
727f22e3 | 2515 | I32 next_is_eval = 0; |
653099ff | 2516 | |
3dab1dad | 2517 | switch (PL_regkind[OP(scan)]) { |
653099ff | 2518 | case WHILEM: /* End of (?:...)* . */ |
c277df42 IZ |
2519 | scan = NEXTOPER(scan); |
2520 | goto finish; | |
2521 | case PLUS: | |
653099ff | 2522 | if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) { |
c277df42 | 2523 | next = NEXTOPER(scan); |
653099ff | 2524 | if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) { |
b81d288d AB |
2525 | mincount = 1; |
2526 | maxcount = REG_INFTY; | |
c277df42 IZ |
2527 | next = regnext(scan); |
2528 | scan = NEXTOPER(scan); | |
2529 | goto do_curly; | |
2530 | } | |
2531 | } | |
2532 | if (flags & SCF_DO_SUBSTR) | |
2533 | data->pos_min++; | |
2534 | min++; | |
2535 | /* Fall through. */ | |
2536 | case STAR: | |
653099ff GS |
2537 | if (flags & SCF_DO_STCLASS) { |
2538 | mincount = 0; | |
b81d288d | 2539 | maxcount = REG_INFTY; |
653099ff GS |
2540 | next = regnext(scan); |
2541 | scan = NEXTOPER(scan); | |
2542 | goto do_curly; | |
2543 | } | |
b81d288d | 2544 | is_inf = is_inf_internal = 1; |
c277df42 IZ |
2545 | scan = regnext(scan); |
2546 | if (flags & SCF_DO_SUBSTR) { | |
830247a4 | 2547 | scan_commit(pRExC_state, data); /* Cannot extend fixed substrings */ |
c277df42 IZ |
2548 | data->longest = &(data->longest_float); |
2549 | } | |
2550 | goto optimize_curly_tail; | |
2551 | case CURLY: | |
b81d288d | 2552 | mincount = ARG1(scan); |
c277df42 IZ |
2553 | maxcount = ARG2(scan); |
2554 | next = regnext(scan); | |
cb434fcc IZ |
2555 | if (OP(scan) == CURLYX) { |
2556 | I32 lp = (data ? *(data->last_closep) : 0); | |
a3621e74 | 2557 | scan->flags = ((lp <= U8_MAX) ? (U8)lp : U8_MAX); |
cb434fcc | 2558 | } |
c277df42 | 2559 | scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
727f22e3 | 2560 | next_is_eval = (OP(scan) == EVAL); |
c277df42 IZ |
2561 | do_curly: |
2562 | if (flags & SCF_DO_SUBSTR) { | |
830247a4 | 2563 | if (mincount == 0) scan_commit(pRExC_state,data); /* Cannot extend fixed substrings */ |
c277df42 IZ |
2564 | pos_before = data->pos_min; |
2565 | } | |
2566 | if (data) { | |
2567 | fl = data->flags; | |
2568 | data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL); | |
2569 | if (is_inf) | |
2570 | data->flags |= SF_IS_INF; | |
2571 | } | |
653099ff | 2572 | if (flags & SCF_DO_STCLASS) { |
830247a4 | 2573 | cl_init(pRExC_state, &this_class); |
653099ff GS |
2574 | oclass = data->start_class; |
2575 | data->start_class = &this_class; | |
2576 | f |= SCF_DO_STCLASS_AND; | |
2577 | f &= ~SCF_DO_STCLASS_OR; | |
2578 | } | |
e1901655 IZ |
2579 | /* These are the cases when once a subexpression |
2580 | fails at a particular position, it cannot succeed | |
2581 | even after backtracking at the enclosing scope. | |
b81d288d | 2582 | |
e1901655 IZ |
2583 | XXXX what if minimal match and we are at the |
2584 | initial run of {n,m}? */ | |
2585 | if ((mincount != maxcount - 1) && (maxcount != REG_INFTY)) | |
2586 | f &= ~SCF_WHILEM_VISITED_POS; | |
653099ff | 2587 | |
c277df42 | 2588 | /* This will finish on WHILEM, setting scan, or on NULL: */ |
b81d288d | 2589 | minnext = study_chunk(pRExC_state, &scan, &deltanext, last, data, |
a3621e74 YO |
2590 | (mincount == 0 |
2591 | ? (f & ~SCF_DO_SUBSTR) : f),depth+1); | |
653099ff GS |
2592 | |
2593 | if (flags & SCF_DO_STCLASS) | |
2594 | data->start_class = oclass; | |
2595 | if (mincount == 0 || minnext == 0) { | |
2596 | if (flags & SCF_DO_STCLASS_OR) { | |
830247a4 | 2597 | cl_or(pRExC_state, data->start_class, &this_class); |
653099ff GS |
2598 | } |
2599 | else if (flags & SCF_DO_STCLASS_AND) { | |
b81d288d | 2600 | /* Switch to OR mode: cache the old value of |
653099ff GS |
2601 | * data->start_class */ |
2602 | StructCopy(data->start_class, &and_with, | |
2603 | struct regnode_charclass_class); | |
2604 | flags &= ~SCF_DO_STCLASS_AND; | |
2605 | StructCopy(&this_class, data->start_class, | |
2606 | struct regnode_charclass_class); | |
2607 | flags |= SCF_DO_STCLASS_OR; | |
2608 | data->start_class->flags |= ANYOF_EOS; | |
2609 | } | |
2610 | } else { /* Non-zero len */ | |
2611 | if (flags & SCF_DO_STCLASS_OR) { | |
830247a4 | 2612 | cl_or(pRExC_state, data->start_class, &this_class); |
653099ff GS |
2613 | cl_and(data->start_class, &and_with); |
2614 | } | |
2615 | else if (flags & SCF_DO_STCLASS_AND) | |
2616 | cl_and(data->start_class, &this_class); | |
2617 | flags &= ~SCF_DO_STCLASS; | |
2618 | } | |
c277df42 IZ |
2619 | if (!scan) /* It was not CURLYX, but CURLY. */ |
2620 | scan = next; | |
041457d9 DM |
2621 | if ( /* ? quantifier ok, except for (?{ ... }) */ |
2622 | (next_is_eval || !(mincount == 0 && maxcount == 1)) | |
84037bb0 | 2623 | && (minnext == 0) && (deltanext == 0) |
99799961 | 2624 | && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR)) |
041457d9 DM |
2625 | && maxcount <= REG_INFTY/3 /* Complement check for big count */ |
2626 | && ckWARN(WARN_REGEXP)) | |
b45f050a | 2627 | { |
830247a4 | 2628 | vWARN(RExC_parse, |
b45f050a JF |
2629 | "Quantifier unexpected on zero-length expression"); |
2630 | } | |
2631 | ||
c277df42 | 2632 | min += minnext * mincount; |
b81d288d | 2633 | is_inf_internal |= ((maxcount == REG_INFTY |
155aba94 GS |
2634 | && (minnext + deltanext) > 0) |
2635 | || deltanext == I32_MAX); | |
aca2d497 | 2636 | is_inf |= is_inf_internal; |
c277df42 IZ |
2637 | delta += (minnext + deltanext) * maxcount - minnext * mincount; |
2638 | ||
2639 | /* Try powerful optimization CURLYX => CURLYN. */ | |
b81d288d | 2640 | if ( OP(oscan) == CURLYX && data |
c277df42 IZ |
2641 | && data->flags & SF_IN_PAR |
2642 | && !(data->flags & SF_HAS_EVAL) | |
2643 | && !deltanext && minnext == 1 ) { | |
2644 | /* Try to optimize to CURLYN. */ | |
2645 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; | |
d4c19fe8 | 2646 | regnode * const nxt1 = nxt; |
497b47a8 JH |
2647 | #ifdef DEBUGGING |
2648 | regnode *nxt2; | |
2649 | #endif | |
c277df42 IZ |
2650 | |
2651 | /* Skip open. */ | |
2652 | nxt = regnext(nxt); | |
bfed75c6 | 2653 | if (!strchr((const char*)PL_simple,OP(nxt)) |
3dab1dad | 2654 | && !(PL_regkind[OP(nxt)] == EXACT |
b81d288d | 2655 | && STR_LEN(nxt) == 1)) |
c277df42 | 2656 | goto nogo; |
497b47a8 | 2657 | #ifdef DEBUGGING |
c277df42 | 2658 | nxt2 = nxt; |
497b47a8 | 2659 | #endif |
c277df42 | 2660 | nxt = regnext(nxt); |
b81d288d | 2661 | if (OP(nxt) != CLOSE) |
c277df42 IZ |
2662 | goto nogo; |
2663 | /* Now we know that nxt2 is the only contents: */ | |
eb160463 | 2664 | oscan->flags = (U8)ARG(nxt); |
c277df42 IZ |
2665 | OP(oscan) = CURLYN; |
2666 | OP(nxt1) = NOTHING; /* was OPEN. */ | |
2667 | #ifdef DEBUGGING | |
2668 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ | |
2669 | NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */ | |
2670 | NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */ | |
2671 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ | |
2672 | OP(nxt + 1) = OPTIMIZED; /* was count. */ | |
2673 | NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */ | |
b81d288d | 2674 | #endif |
c277df42 | 2675 | } |
c277df42 IZ |
2676 | nogo: |
2677 | ||
2678 | /* Try optimization CURLYX => CURLYM. */ | |
b81d288d | 2679 | if ( OP(oscan) == CURLYX && data |
c277df42 | 2680 | && !(data->flags & SF_HAS_PAR) |
c277df42 | 2681 | && !(data->flags & SF_HAS_EVAL) |
0e788c72 HS |
2682 | && !deltanext /* atom is fixed width */ |
2683 | && minnext != 0 /* CURLYM can't handle zero width */ | |
2684 | ) { | |
c277df42 IZ |
2685 | /* XXXX How to optimize if data == 0? */ |
2686 | /* Optimize to a simpler form. */ | |
2687 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */ | |
2688 | regnode *nxt2; | |
2689 | ||
2690 | OP(oscan) = CURLYM; | |
2691 | while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/ | |
b81d288d | 2692 | && (OP(nxt2) != WHILEM)) |
c277df42 IZ |
2693 | nxt = nxt2; |
2694 | OP(nxt2) = SUCCEED; /* Whas WHILEM */ | |
c277df42 IZ |
2695 | /* Need to optimize away parenths. */ |
2696 | if (data->flags & SF_IN_PAR) { | |
2697 | /* Set the parenth number. */ | |
2698 | regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/ | |
2699 | ||
b81d288d | 2700 | if (OP(nxt) != CLOSE) |
b45f050a | 2701 | FAIL("Panic opt close"); |
eb160463 | 2702 | oscan->flags = (U8)ARG(nxt); |
c277df42 IZ |
2703 | OP(nxt1) = OPTIMIZED; /* was OPEN. */ |
2704 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ | |
2705 | #ifdef DEBUGGING | |
2706 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ | |
2707 | OP(nxt + 1) = OPTIMIZED; /* was count. */ | |
2708 | NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */ | |
2709 | NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */ | |
b81d288d | 2710 | #endif |
c277df42 IZ |
2711 | #if 0 |
2712 | while ( nxt1 && (OP(nxt1) != WHILEM)) { | |
2713 | regnode *nnxt = regnext(nxt1); | |
b81d288d | 2714 | |
c277df42 IZ |
2715 | if (nnxt == nxt) { |
2716 | if (reg_off_by_arg[OP(nxt1)]) | |
2717 | ARG_SET(nxt1, nxt2 - nxt1); | |
2718 | else if (nxt2 - nxt1 < U16_MAX) | |
2719 | NEXT_OFF(nxt1) = nxt2 - nxt1; | |
2720 | else | |
2721 | OP(nxt) = NOTHING; /* Cannot beautify */ | |
2722 | } | |
2723 | nxt1 = nnxt; | |
2724 | } | |
2725 | #endif | |
2726 | /* Optimize again: */ | |
b81d288d | 2727 | study_chunk(pRExC_state, &nxt1, &deltanext, nxt, |
a3621e74 | 2728 | NULL, 0,depth+1); |
a0ed51b3 LW |
2729 | } |
2730 | else | |
c277df42 | 2731 | oscan->flags = 0; |
c277df42 | 2732 | } |
e1901655 IZ |
2733 | else if ((OP(oscan) == CURLYX) |
2734 | && (flags & SCF_WHILEM_VISITED_POS) | |
2735 | /* See the comment on a similar expression above. | |
2736 | However, this time it not a subexpression | |
2737 | we care about, but the expression itself. */ | |
2738 | && (maxcount == REG_INFTY) | |
2739 | && data && ++data->whilem_c < 16) { | |
2740 | /* This stays as CURLYX, we can put the count/of pair. */ | |
2c2d71f5 JH |
2741 | /* Find WHILEM (as in regexec.c) */ |
2742 | regnode *nxt = oscan + NEXT_OFF(oscan); | |
2743 | ||
2744 | if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */ | |
2745 | nxt += ARG(nxt); | |
eb160463 GS |
2746 | PREVOPER(nxt)->flags = (U8)(data->whilem_c |
2747 | | (RExC_whilem_seen << 4)); /* On WHILEM */ | |
2c2d71f5 | 2748 | } |
b81d288d | 2749 | if (data && fl & (SF_HAS_PAR|SF_IN_PAR)) |
c277df42 IZ |
2750 | pars++; |
2751 | if (flags & SCF_DO_SUBSTR) { | |
c445ea15 | 2752 | SV *last_str = NULL; |
c277df42 IZ |
2753 | int counted = mincount != 0; |
2754 | ||
2755 | if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */ | |
5d1c421c JH |
2756 | #if defined(SPARC64_GCC_WORKAROUND) |
2757 | I32 b = 0; | |
2758 | STRLEN l = 0; | |
cfd0369c | 2759 | const char *s = NULL; |
5d1c421c JH |
2760 | I32 old = 0; |
2761 | ||
2762 | if (pos_before >= data->last_start_min) | |
2763 | b = pos_before; | |
2764 | else | |
2765 | b = data->last_start_min; | |
2766 | ||
2767 | l = 0; | |
cfd0369c | 2768 | s = SvPV_const(data->last_found, l); |
5d1c421c JH |
2769 | old = b - data->last_start_min; |
2770 | ||
2771 | #else | |
b81d288d | 2772 | I32 b = pos_before >= data->last_start_min |
c277df42 IZ |
2773 | ? pos_before : data->last_start_min; |
2774 | STRLEN l; | |
d4c19fe8 | 2775 | const char * const s = SvPV_const(data->last_found, l); |
a0ed51b3 | 2776 | I32 old = b - data->last_start_min; |
5d1c421c | 2777 | #endif |
a0ed51b3 LW |
2778 | |
2779 | if (UTF) | |
2780 | old = utf8_hop((U8*)s, old) - (U8*)s; | |
c277df42 | 2781 | |
a0ed51b3 | 2782 | l -= old; |
c277df42 | 2783 | /* Get the added string: */ |
79cb57f6 | 2784 | last_str = newSVpvn(s + old, l); |
0e933229 IH |
2785 | if (UTF) |
2786 | SvUTF8_on(last_str); | |
c277df42 IZ |
2787 | if (deltanext == 0 && pos_before == b) { |
2788 | /* What was added is a constant string */ | |
2789 | if (mincount > 1) { | |
2790 | SvGROW(last_str, (mincount * l) + 1); | |
b81d288d | 2791 | repeatcpy(SvPVX(last_str) + l, |
3f7c398e | 2792 | SvPVX_const(last_str), l, mincount - 1); |
b162af07 | 2793 | SvCUR_set(last_str, SvCUR(last_str) * mincount); |
c277df42 | 2794 | /* Add additional parts. */ |
b81d288d | 2795 | SvCUR_set(data->last_found, |
c277df42 IZ |
2796 | SvCUR(data->last_found) - l); |
2797 | sv_catsv(data->last_found, last_str); | |
0eda9292 JH |
2798 | { |
2799 | SV * sv = data->last_found; | |
2800 | MAGIC *mg = | |
2801 | SvUTF8(sv) && SvMAGICAL(sv) ? | |
2802 | mg_find(sv, PERL_MAGIC_utf8) : NULL; | |
2803 | if (mg && mg->mg_len >= 0) | |
2804 | mg->mg_len += CHR_SVLEN(last_str); | |
2805 | } | |
c277df42 IZ |
2806 | data->last_end += l * (mincount - 1); |
2807 | } | |
2a8d9689 HS |
2808 | } else { |
2809 | /* start offset must point into the last copy */ | |
2810 | data->last_start_min += minnext * (mincount - 1); | |
c152dc43 HS |
2811 | data->last_start_max += is_inf ? I32_MAX |
2812 | : (maxcount - 1) * (minnext + data->pos_delta); | |
c277df42 IZ |
2813 | } |
2814 | } | |
2815 | /* It is counted once already... */ | |
2816 | data->pos_min += minnext * (mincount - counted); | |
2817 | data->pos_delta += - counted * deltanext + | |
2818 | (minnext + deltanext) * maxcount - minnext * mincount; | |
2819 | if (mincount != maxcount) { | |
653099ff GS |
2820 | /* Cannot extend fixed substrings found inside |
2821 | the group. */ | |
830247a4 | 2822 | scan_commit(pRExC_state,data); |
c277df42 | 2823 | if (mincount && last_str) { |
d4c19fe8 AL |
2824 | SV * const sv = data->last_found; |
2825 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? | |
45f47268 NC |
2826 | mg_find(sv, PERL_MAGIC_utf8) : NULL; |
2827 | ||
2828 | if (mg) | |
2829 | mg->mg_len = -1; | |
2830 | sv_setsv(sv, last_str); | |
c277df42 | 2831 | data->last_end = data->pos_min; |
b81d288d | 2832 | data->last_start_min = |
a0ed51b3 | 2833 | data->pos_min - CHR_SVLEN(last_str); |
b81d288d AB |
2834 | data->last_start_max = is_inf |
2835 | ? I32_MAX | |
c277df42 | 2836 | : data->pos_min + data->pos_delta |
a0ed51b3 | 2837 | - CHR_SVLEN(last_str); |
c277df42 IZ |
2838 | } |
2839 | data->longest = &(data->longest_float); | |
2840 | } | |
aca2d497 | 2841 | SvREFCNT_dec(last_str); |
c277df42 | 2842 | } |
405ff068 | 2843 | if (data && (fl & SF_HAS_EVAL)) |
c277df42 IZ |
2844 | data->flags |= SF_HAS_EVAL; |
2845 | optimize_curly_tail: | |
c277df42 | 2846 | if (OP(oscan) != CURLYX) { |
3dab1dad | 2847 | while (PL_regkind[OP(next = regnext(oscan))] == NOTHING |
c277df42 IZ |
2848 | && NEXT_OFF(next)) |
2849 | NEXT_OFF(oscan) += NEXT_OFF(next); | |
2850 | } | |
c277df42 | 2851 | continue; |
653099ff | 2852 | default: /* REF and CLUMP only? */ |
c277df42 | 2853 | if (flags & SCF_DO_SUBSTR) { |
830247a4 | 2854 | scan_commit(pRExC_state,data); /* Cannot expect anything... */ |
c277df42 IZ |
2855 | data->longest = &(data->longest_float); |
2856 | } | |
aca2d497 | 2857 | is_inf = is_inf_internal = 1; |
653099ff | 2858 | if (flags & SCF_DO_STCLASS_OR) |
830247a4 | 2859 | cl_anything(pRExC_state, data->start_class); |
653099ff | 2860 | flags &= ~SCF_DO_STCLASS; |
c277df42 IZ |
2861 | break; |
2862 | } | |
a0ed51b3 | 2863 | } |
bfed75c6 | 2864 | else if (strchr((const char*)PL_simple,OP(scan))) { |
9c5ffd7c | 2865 | int value = 0; |
653099ff | 2866 | |
c277df42 | 2867 | if (flags & SCF_DO_SUBSTR) { |
830247a4 | 2868 | scan_commit(pRExC_state,data); |
c277df42 IZ |
2869 | data->pos_min++; |
2870 | } | |
2871 | min++; | |
653099ff GS |
2872 | if (flags & SCF_DO_STCLASS) { |
2873 | data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */ | |
2874 | ||
2875 | /* Some of the logic below assumes that switching | |
2876 | locale on will only add false positives. */ | |
3dab1dad | 2877 | switch (PL_regkind[OP(scan)]) { |
653099ff | 2878 | case SANY: |
653099ff GS |
2879 | default: |
2880 | do_default: | |
2881 | /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */ | |
2882 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ | |
830247a4 | 2883 | cl_anything(pRExC_state, data->start_class); |
653099ff GS |
2884 | break; |
2885 | case REG_ANY: | |
2886 | if (OP(scan) == SANY) | |
2887 | goto do_default; | |
2888 | if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */ | |
2889 | value = (ANYOF_BITMAP_TEST(data->start_class,'\n') | |
2890 | || (data->start_class->flags & ANYOF_CLASS)); | |
830247a4 | 2891 | cl_anything(pRExC_state, data->start_class); |
653099ff GS |
2892 | } |
2893 | if (flags & SCF_DO_STCLASS_AND || !value) | |
2894 | ANYOF_BITMAP_CLEAR(data->start_class,'\n'); | |
2895 | break; | |
2896 | case ANYOF: | |
2897 | if (flags & SCF_DO_STCLASS_AND) | |
2898 | cl_and(data->start_class, | |
2899 | (struct regnode_charclass_class*)scan); | |
2900 | else | |
830247a4 | 2901 | cl_or(pRExC_state, data->start_class, |
653099ff GS |
2902 | (struct regnode_charclass_class*)scan); |
2903 | break; | |
2904 | case ALNUM: | |
2905 | if (flags & SCF_DO_STCLASS_AND) { | |
2906 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
2907 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM); | |
2908 | for (value = 0; value < 256; value++) | |
2909 | if (!isALNUM(value)) | |
2910 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
2911 | } | |
2912 | } | |
2913 | else { | |
2914 | if (data->start_class->flags & ANYOF_LOCALE) | |
2915 | ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM); | |
2916 | else { | |
2917 | for (value = 0; value < 256; value++) | |
2918 | if (isALNUM(value)) | |
b81d288d | 2919 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
2920 | } |
2921 | } | |
2922 | break; | |
2923 | case ALNUML: | |
2924 | if (flags & SCF_DO_STCLASS_AND) { | |
2925 | if (data->start_class->flags & ANYOF_LOCALE) | |
2926 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM); | |
2927 | } | |
2928 | else { | |
2929 | ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM); | |
2930 | data->start_class->flags |= ANYOF_LOCALE; | |
2931 | } | |
2932 | break; | |
2933 | case NALNUM: | |
2934 | if (flags & SCF_DO_STCLASS_AND) { | |
2935 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
2936 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM); | |
2937 | for (value = 0; value < 256; value++) | |
2938 | if (isALNUM(value)) | |
2939 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
2940 | } | |
2941 | } | |
2942 | else { | |
2943 | if (data->start_class->flags & ANYOF_LOCALE) | |
2944 | ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM); | |
2945 | else { | |
2946 | for (value = 0; value < 256; value++) | |
2947 | if (!isALNUM(value)) | |
b81d288d | 2948 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
2949 | } |
2950 | } | |
2951 | break; | |
2952 | case NALNUML: | |
2953 | if (flags & SCF_DO_STCLASS_AND) { | |
2954 | if (data->start_class->flags & ANYOF_LOCALE) | |
2955 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM); | |
2956 | } | |
2957 | else { | |
2958 | data->start_class->flags |= ANYOF_LOCALE; | |
2959 | ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM); | |
2960 | } | |
2961 | break; | |
2962 | case SPACE: | |
2963 | if (flags & SCF_DO_STCLASS_AND) { | |
2964 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
2965 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE); | |
2966 | for (value = 0; value < 256; value++) | |
2967 | if (!isSPACE(value)) | |
2968 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
2969 | } | |
2970 | } | |
2971 | else { | |
2972 | if (data->start_class->flags & ANYOF_LOCALE) | |
2973 | ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE); | |
2974 | else { | |
2975 | for (value = 0; value < 256; value++) | |
2976 | if (isSPACE(value)) | |
b81d288d | 2977 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
2978 | } |
2979 | } | |
2980 | break; | |
2981 | case SPACEL: | |
2982 | if (flags & SCF_DO_STCLASS_AND) { | |
2983 | if (data->start_class->flags & ANYOF_LOCALE) | |
2984 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE); | |
2985 | } | |
2986 | else { | |
2987 | data->start_class->flags |= ANYOF_LOCALE; | |
2988 | ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE); | |
2989 | } | |
2990 | break; | |
2991 | case NSPACE: | |
2992 | if (flags & SCF_DO_STCLASS_AND) { | |
2993 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
2994 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE); | |
2995 | for (value = 0; value < 256; value++) | |
2996 | if (isSPACE(value)) | |
2997 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
2998 | } | |
2999 | } | |
3000 | else { | |
3001 | if (data->start_class->flags & ANYOF_LOCALE) | |
3002 | ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE); | |
3003 | else { | |
3004 | for (value = 0; value < 256; value++) | |
3005 | if (!isSPACE(value)) | |
b81d288d | 3006 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3007 | } |
3008 | } | |
3009 | break; | |
3010 | case NSPACEL: | |
3011 | if (flags & SCF_DO_STCLASS_AND) { | |
3012 | if (data->start_class->flags & ANYOF_LOCALE) { | |
3013 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE); | |
3014 | for (value = 0; value < 256; value++) | |
3015 | if (!isSPACE(value)) | |
3016 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3017 | } | |
3018 | } | |
3019 | else { | |
3020 | data->start_class->flags |= ANYOF_LOCALE; | |
3021 | ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE); | |
3022 | } | |
3023 | break; | |
3024 | case DIGIT: | |
3025 | if (flags & SCF_DO_STCLASS_AND) { | |
3026 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT); | |
3027 | for (value = 0; value < 256; value++) | |
3028 | if (!isDIGIT(value)) | |
3029 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3030 | } | |
3031 | else { | |
3032 | if (data->start_class->flags & ANYOF_LOCALE) | |
3033 | ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT); | |
3034 | else { | |
3035 | for (value = 0; value < 256; value++) | |
3036 | if (isDIGIT(value)) | |
b81d288d | 3037 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3038 | } |
3039 | } | |
3040 | break; | |
3041 | case NDIGIT: | |
3042 | if (flags & SCF_DO_STCLASS_AND) { | |
3043 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT); | |
3044 | for (value = 0; value < 256; value++) | |
3045 | if (isDIGIT(value)) | |
3046 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3047 | } | |
3048 | else { | |
3049 | if (data->start_class->flags & ANYOF_LOCALE) | |
3050 | ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT); | |
3051 | else { | |
3052 | for (value = 0; value < 256; value++) | |
3053 | if (!isDIGIT(value)) | |
b81d288d | 3054 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3055 | } |
3056 | } | |
3057 | break; | |
3058 | } | |
3059 | if (flags & SCF_DO_STCLASS_OR) | |
3060 | cl_and(data->start_class, &and_with); | |
3061 | flags &= ~SCF_DO_STCLASS; | |
3062 | } | |
a0ed51b3 | 3063 | } |
3dab1dad | 3064 | else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) { |
c277df42 IZ |
3065 | data->flags |= (OP(scan) == MEOL |
3066 | ? SF_BEFORE_MEOL | |
3067 | : SF_BEFORE_SEOL); | |
a0ed51b3 | 3068 | } |
3dab1dad | 3069 | else if ( PL_regkind[OP(scan)] == BRANCHJ |
653099ff GS |
3070 | /* Lookbehind, or need to calculate parens/evals/stclass: */ |
3071 | && (scan->flags || data || (flags & SCF_DO_STCLASS)) | |
c277df42 | 3072 | && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) { |
653099ff | 3073 | /* Lookahead/lookbehind */ |
cb434fcc | 3074 | I32 deltanext, minnext, fake = 0; |
c277df42 | 3075 | regnode *nscan; |
653099ff GS |
3076 | struct regnode_charclass_class intrnl; |
3077 | int f = 0; | |
c277df42 IZ |
3078 | |
3079 | data_fake.flags = 0; | |
b81d288d | 3080 | if (data) { |
2c2d71f5 | 3081 | data_fake.whilem_c = data->whilem_c; |
cb434fcc IZ |
3082 | data_fake.last_closep = data->last_closep; |
3083 | } | |
3084 | else | |
3085 | data_fake.last_closep = &fake; | |
653099ff GS |
3086 | if ( flags & SCF_DO_STCLASS && !scan->flags |
3087 | && OP(scan) == IFMATCH ) { /* Lookahead */ | |
830247a4 | 3088 | cl_init(pRExC_state, &intrnl); |
653099ff | 3089 | data_fake.start_class = &intrnl; |
e1901655 | 3090 | f |= SCF_DO_STCLASS_AND; |
653099ff | 3091 | } |
e1901655 IZ |
3092 | if (flags & SCF_WHILEM_VISITED_POS) |
3093 | f |= SCF_WHILEM_VISITED_POS; | |
c277df42 IZ |
3094 | next = regnext(scan); |
3095 | nscan = NEXTOPER(NEXTOPER(scan)); | |
a3621e74 | 3096 | minnext = study_chunk(pRExC_state, &nscan, &deltanext, last, &data_fake, f,depth+1); |
c277df42 IZ |
3097 | if (scan->flags) { |
3098 | if (deltanext) { | |
9baa0206 | 3099 | vFAIL("Variable length lookbehind not implemented"); |
a0ed51b3 LW |
3100 | } |
3101 | else if (minnext > U8_MAX) { | |
9baa0206 | 3102 | vFAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX); |
c277df42 | 3103 | } |
eb160463 | 3104 | scan->flags = (U8)minnext; |
c277df42 | 3105 | } |
be8e71aa YO |
3106 | if (data) { |
3107 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
3108 | pars++; | |
3109 | if (data_fake.flags & SF_HAS_EVAL) | |
3110 | data->flags |= SF_HAS_EVAL; | |
2c2d71f5 | 3111 | data->whilem_c = data_fake.whilem_c; |
be8e71aa | 3112 | } |
e1901655 | 3113 | if (f & SCF_DO_STCLASS_AND) { |
a28509cc | 3114 | const int was = (data->start_class->flags & ANYOF_EOS); |
653099ff GS |
3115 | |
3116 | cl_and(data->start_class, &intrnl); | |
3117 | if (was) | |
3118 | data->start_class->flags |= ANYOF_EOS; | |
3119 | } | |
a0ed51b3 LW |
3120 | } |
3121 | else if (OP(scan) == OPEN) { | |
c277df42 | 3122 | pars++; |
a0ed51b3 | 3123 | } |
cb434fcc | 3124 | else if (OP(scan) == CLOSE) { |
eb160463 | 3125 | if ((I32)ARG(scan) == is_par) { |
cb434fcc | 3126 | next = regnext(scan); |
c277df42 | 3127 | |
cb434fcc IZ |
3128 | if ( next && (OP(next) != WHILEM) && next < last) |
3129 | is_par = 0; /* Disable optimization */ | |
3130 | } | |
3131 | if (data) | |
3132 | *(data->last_closep) = ARG(scan); | |
a0ed51b3 LW |
3133 | } |
3134 | else if (OP(scan) == EVAL) { | |
c277df42 IZ |
3135 | if (data) |
3136 | data->flags |= SF_HAS_EVAL; | |
3137 | } | |
96776eda | 3138 | else if (OP(scan) == LOGICAL && scan->flags == 2) { /* Embedded follows */ |
0f5d15d6 | 3139 | if (flags & SCF_DO_SUBSTR) { |
830247a4 | 3140 | scan_commit(pRExC_state,data); |
0f5d15d6 IZ |
3141 | data->longest = &(data->longest_float); |
3142 | } | |
3143 | is_inf = is_inf_internal = 1; | |
653099ff | 3144 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ |
830247a4 | 3145 | cl_anything(pRExC_state, data->start_class); |
96776eda | 3146 | flags &= ~SCF_DO_STCLASS; |
0f5d15d6 | 3147 | } |
c277df42 IZ |
3148 | /* Else: zero-length, ignore. */ |
3149 | scan = regnext(scan); | |
3150 | } | |
3151 | ||
3152 | finish: | |
3153 | *scanp = scan; | |
aca2d497 | 3154 | *deltap = is_inf_internal ? I32_MAX : delta; |
b81d288d | 3155 | if (flags & SCF_DO_SUBSTR && is_inf) |
c277df42 IZ |
3156 | data->pos_delta = I32_MAX - data->pos_min; |
3157 | if (is_par > U8_MAX) | |
3158 | is_par = 0; | |
3159 | if (is_par && pars==1 && data) { | |
3160 | data->flags |= SF_IN_PAR; | |
3161 | data->flags &= ~SF_HAS_PAR; | |
a0ed51b3 LW |
3162 | } |
3163 | else if (pars && data) { | |
c277df42 IZ |
3164 | data->flags |= SF_HAS_PAR; |
3165 | data->flags &= ~SF_IN_PAR; | |
3166 | } | |
653099ff GS |
3167 | if (flags & SCF_DO_STCLASS_OR) |
3168 | cl_and(data->start_class, &and_with); | |
07be1b83 YO |
3169 | if (flags & SCF_EXACT_TRIE) |
3170 | data->flags |= SCF_EXACT_TRIE; | |
c277df42 IZ |
3171 | return min; |
3172 | } | |
3173 | ||
76e3520e | 3174 | STATIC I32 |
5f66b61c | 3175 | S_add_data(RExC_state_t *pRExC_state, I32 n, const char *s) |
c277df42 | 3176 | { |
830247a4 | 3177 | if (RExC_rx->data) { |
b81d288d AB |
3178 | Renewc(RExC_rx->data, |
3179 | sizeof(*RExC_rx->data) + sizeof(void*) * (RExC_rx->data->count + n - 1), | |
c277df42 | 3180 | char, struct reg_data); |
830247a4 IZ |
3181 | Renew(RExC_rx->data->what, RExC_rx->data->count + n, U8); |
3182 | RExC_rx->data->count += n; | |
a0ed51b3 LW |
3183 | } |
3184 | else { | |
a02a5408 | 3185 | Newxc(RExC_rx->data, sizeof(*RExC_rx->data) + sizeof(void*) * (n - 1), |
c277df42 | 3186 | char, struct reg_data); |
a02a5408 | 3187 | Newx(RExC_rx->data->what, n, U8); |
830247a4 | 3188 | RExC_rx->data->count = n; |
c277df42 | 3189 | } |
830247a4 IZ |
3190 | Copy(s, RExC_rx->data->what + RExC_rx->data->count - n, n, U8); |
3191 | return RExC_rx->data->count - n; | |
c277df42 IZ |
3192 | } |
3193 | ||
76234dfb | 3194 | #ifndef PERL_IN_XSUB_RE |
d88dccdf | 3195 | void |
864dbfa3 | 3196 | Perl_reginitcolors(pTHX) |
d88dccdf | 3197 | { |
97aff369 | 3198 | dVAR; |
1df70142 | 3199 | const char * const s = PerlEnv_getenv("PERL_RE_COLORS"); |
d88dccdf | 3200 | if (s) { |
1df70142 AL |
3201 | char *t = savepv(s); |
3202 | int i = 0; | |
3203 | PL_colors[0] = t; | |
d88dccdf | 3204 | while (++i < 6) { |
1df70142 AL |
3205 | t = strchr(t, '\t'); |
3206 | if (t) { | |
3207 | *t = '\0'; | |
3208 | PL_colors[i] = ++t; | |
d88dccdf IZ |
3209 | } |
3210 | else | |
1df70142 | 3211 | PL_colors[i] = t = (char *)""; |
d88dccdf IZ |
3212 | } |
3213 | } else { | |
1df70142 | 3214 | int i = 0; |
b81d288d | 3215 | while (i < 6) |
06b5626a | 3216 | PL_colors[i++] = (char *)""; |
d88dccdf IZ |
3217 | } |
3218 | PL_colorset = 1; | |
3219 | } | |
76234dfb | 3220 | #endif |
8615cb43 | 3221 | |
07be1b83 | 3222 | |
a687059c | 3223 | /* |
e50aee73 | 3224 | - pregcomp - compile a regular expression into internal code |
a687059c LW |
3225 | * |
3226 | * We can't allocate space until we know how big the compiled form will be, | |
3227 | * but we can't compile it (and thus know how big it is) until we've got a | |
3228 | * place to put the code. So we cheat: we compile it twice, once with code | |
3229 | * generation turned off and size counting turned on, and once "for real". | |
3230 | * This also means that we don't allocate space until we are sure that the | |
3231 | * thing really will compile successfully, and we never have to move the | |
3232 | * code and thus invalidate pointers into it. (Note that it has to be in | |
3233 | * one piece because free() must be able to free it all.) [NB: not true in perl] | |
3234 | * | |
3235 | * Beware that the optimization-preparation code in here knows about some | |
3236 | * of the structure of the compiled regexp. [I'll say.] | |
3237 | */ | |
3238 | regexp * | |
864dbfa3 | 3239 | Perl_pregcomp(pTHX_ char *exp, char *xend, PMOP *pm) |
a687059c | 3240 | { |
97aff369 | 3241 | dVAR; |
a0d0e21e | 3242 | register regexp *r; |
c277df42 | 3243 | regnode *scan; |
c277df42 | 3244 | regnode *first; |
a0d0e21e | 3245 | I32 flags; |
a0d0e21e LW |
3246 | I32 minlen = 0; |
3247 | I32 sawplus = 0; | |
3248 | I32 sawopen = 0; | |
2c2d71f5 | 3249 | scan_data_t data; |
830247a4 | 3250 | RExC_state_t RExC_state; |
be8e71aa | 3251 | RExC_state_t * const pRExC_state = &RExC_state; |
07be1b83 YO |
3252 | #ifdef TRIE_STUDY_OPT |
3253 | int restudied= 0; | |
3254 | RExC_state_t copyRExC_state; | |
3255 | #endif | |
a0d0e21e | 3256 | |
a3621e74 YO |
3257 | GET_RE_DEBUG_FLAGS_DECL; |
3258 | ||
a0d0e21e | 3259 | if (exp == NULL) |
c277df42 | 3260 | FAIL("NULL regexp argument"); |
a0d0e21e | 3261 | |
a5961de5 | 3262 | RExC_utf8 = pm->op_pmdynflags & PMdf_CMP_UTF8; |
a0ed51b3 | 3263 | |
5cfc7842 | 3264 | RExC_precomp = exp; |
a3621e74 YO |
3265 | DEBUG_r(if (!PL_colorset) reginitcolors()); |
3266 | DEBUG_COMPILE_r({ | |
ab3bbdeb YO |
3267 | SV *dsv= sv_newmortal(); |
3268 | RE_PV_QUOTED_DECL(s, RExC_utf8, | |
3269 | dsv, RExC_precomp, (xend - exp), 60); | |
3270 | PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n", | |
3271 | PL_colors[4],PL_colors[5],s); | |
a5961de5 | 3272 | }); |
e2509266 | 3273 | RExC_flags = pm->op_pmflags; |
830247a4 | 3274 | RExC_sawback = 0; |
bbce6d69 | 3275 | |
830247a4 IZ |
3276 | RExC_seen = 0; |
3277 | RExC_seen_zerolen = *exp == '^' ? -1 : 0; | |
3278 | RExC_seen_evals = 0; | |
3279 | RExC_extralen = 0; | |
c277df42 | 3280 | |
bbce6d69 | 3281 | /* First pass: determine size, legality. */ |
830247a4 | 3282 | RExC_parse = exp; |
fac92740 | 3283 | RExC_start = exp; |
830247a4 IZ |
3284 | RExC_end = xend; |
3285 | RExC_naughty = 0; | |
3286 | RExC_npar = 1; | |
3287 | RExC_size = 0L; | |
3288 | RExC_emit = &PL_regdummy; | |
3289 | RExC_whilem_seen = 0; | |
85ddcde9 JH |
3290 | #if 0 /* REGC() is (currently) a NOP at the first pass. |
3291 | * Clever compilers notice this and complain. --jhi */ | |
830247a4 | 3292 | REGC((U8)REG_MAGIC, (char*)RExC_emit); |
85ddcde9 | 3293 | #endif |
3dab1dad YO |
3294 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n")); |
3295 | if (reg(pRExC_state, 0, &flags,1) == NULL) { | |
c445ea15 | 3296 | RExC_precomp = NULL; |
a0d0e21e LW |
3297 | return(NULL); |
3298 | } | |
3dab1dad YO |
3299 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Required ")); |
3300 | DEBUG_COMPILE_r(PerlIO_printf(Perl_debug_log, "size %"IVdf" nodes ", (IV)RExC_size)); | |
3301 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nStarting second pass (creation)\n")); | |
07be1b83 YO |
3302 | DEBUG_PARSE_r({ |
3303 | RExC_lastnum=0; | |
3304 | RExC_lastparse=NULL; | |
3305 | }); | |
c277df42 | 3306 | |
07be1b83 | 3307 | |
c277df42 IZ |
3308 | /* Small enough for pointer-storage convention? |
3309 | If extralen==0, this means that we will not need long jumps. */ | |
830247a4 IZ |
3310 | if (RExC_size >= 0x10000L && RExC_extralen) |
3311 | RExC_size += RExC_extralen; | |
c277df42 | 3312 | else |
830247a4 IZ |
3313 | RExC_extralen = 0; |
3314 | if (RExC_whilem_seen > 15) | |
3315 | RExC_whilem_seen = 15; | |
a0d0e21e | 3316 | |
bbce6d69 | 3317 | /* Allocate space and initialize. */ |
a02a5408 | 3318 | Newxc(r, sizeof(regexp) + (unsigned)RExC_size * sizeof(regnode), |
c277df42 | 3319 | char, regexp); |
a0d0e21e | 3320 | if (r == NULL) |
b45f050a JF |
3321 | FAIL("Regexp out of space"); |
3322 | ||
0f79a09d GS |
3323 | #ifdef DEBUGGING |
3324 | /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */ | |
830247a4 | 3325 | Zero(r, sizeof(regexp) + (unsigned)RExC_size * sizeof(regnode), char); |
0f79a09d | 3326 | #endif |
c277df42 | 3327 | r->refcnt = 1; |
bbce6d69 | 3328 | r->prelen = xend - exp; |
5cfc7842 | 3329 | r->precomp = savepvn(RExC_precomp, r->prelen); |
cf93c79d | 3330 | r->subbeg = NULL; |
f8c7b90f | 3331 | #ifdef PERL_OLD_COPY_ON_WRITE |
c445ea15 | 3332 | r->saved_copy = NULL; |
ed252734 | 3333 | #endif |
cf93c79d | 3334 | r->reganch = pm->op_pmflags & PMf_COMPILETIME; |
830247a4 | 3335 | r->nparens = RExC_npar - 1; /* set early to validate backrefs */ |
38d1b06f | 3336 | r->lastparen = 0; /* mg.c reads this. */ |
4327152a IZ |
3337 | |
3338 | r->substrs = 0; /* Useful during FAIL. */ | |
3339 | r->startp = 0; /* Useful during FAIL. */ | |
3340 | r->endp = 0; /* Useful during FAIL. */ | |
3341 | ||
a02a5408 | 3342 | Newxz(r->offsets, 2*RExC_size+1, U32); /* MJD 20001228 */ |
fac92740 | 3343 | if (r->offsets) { |
2af232bd | 3344 | r->offsets[0] = RExC_size; |
fac92740 | 3345 | } |
a3621e74 | 3346 | DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log, |
2af232bd SS |
3347 | "%s %"UVuf" bytes for offset annotations.\n", |
3348 | r->offsets ? "Got" : "Couldn't get", | |
392fbf5d | 3349 | (UV)((2*RExC_size+1) * sizeof(U32)))); |
fac92740 | 3350 | |
830247a4 | 3351 | RExC_rx = r; |
bbce6d69 | 3352 | |
3353 | /* Second pass: emit code. */ | |
e2509266 | 3354 | RExC_flags = pm->op_pmflags; /* don't let top level (?i) bleed */ |
830247a4 IZ |
3355 | RExC_parse = exp; |
3356 | RExC_end = xend; | |
3357 | RExC_naughty = 0; | |
3358 | RExC_npar = 1; | |
fac92740 | 3359 | RExC_emit_start = r->program; |
830247a4 | 3360 | RExC_emit = r->program; |
2cd61cdb | 3361 | /* Store the count of eval-groups for security checks: */ |
eb160463 | 3362 | RExC_emit->next_off = (U16)((RExC_seen_evals > U16_MAX) ? U16_MAX : RExC_seen_evals); |
830247a4 | 3363 | REGC((U8)REG_MAGIC, (char*) RExC_emit++); |
c277df42 | 3364 | r->data = 0; |
3dab1dad | 3365 | if (reg(pRExC_state, 0, &flags,1) == NULL) |
a0d0e21e | 3366 | return(NULL); |
07be1b83 YO |
3367 | /* XXXX To minimize changes to RE engine we always allocate |
3368 | 3-units-long substrs field. */ | |
3369 | Newx(r->substrs, 1, struct reg_substr_data); | |
a0d0e21e | 3370 | |
07be1b83 YO |
3371 | reStudy: |
3372 | Zero(r->substrs, 1, struct reg_substr_data); | |
3373 | StructCopy(&zero_scan_data, &data, scan_data_t); | |
a3621e74 | 3374 | |
07be1b83 YO |
3375 | #ifdef TRIE_STUDY_OPT |
3376 | if ( restudied ) { | |
3377 | DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n")); | |
3378 | RExC_state=copyRExC_state; | |
3379 | if (data.longest_fixed) | |
3380 | SvREFCNT_dec(data.longest_fixed); | |
3381 | if (data.longest_float) | |
3382 | SvREFCNT_dec(data.longest_float); | |
3383 | if (data.last_found) | |
3384 | SvREFCNT_dec(data.last_found); | |
3385 | } else { | |
3386 | copyRExC_state=RExC_state; | |
3387 | } | |
3388 | #endif | |
a0d0e21e | 3389 | /* Dig out information for optimizations. */ |
cf93c79d | 3390 | r->reganch = pm->op_pmflags & PMf_COMPILETIME; /* Again? */ |
e2509266 | 3391 | pm->op_pmflags = RExC_flags; |
a0ed51b3 | 3392 | if (UTF) |
5ff6fc6d | 3393 | r->reganch |= ROPT_UTF8; /* Unicode in it? */ |
c277df42 | 3394 | r->regstclass = NULL; |
830247a4 | 3395 | if (RExC_naughty >= 10) /* Probably an expensive pattern. */ |
a0ed51b3 | 3396 | r->reganch |= ROPT_NAUGHTY; |
c277df42 | 3397 | scan = r->program + 1; /* First BRANCH. */ |
2779dcf1 | 3398 | |
653099ff | 3399 | /* XXXX Should not we check for something else? Usually it is OPEN1... */ |
c277df42 | 3400 | if (OP(scan) != BRANCH) { /* Only one top-level choice. */ |
c277df42 | 3401 | I32 fake; |
c5254dd6 | 3402 | STRLEN longest_float_length, longest_fixed_length; |
07be1b83 | 3403 | struct regnode_charclass_class ch_class; /* pointed to by data */ |
653099ff | 3404 | int stclass_flag; |
07be1b83 | 3405 | I32 last_close = 0; /* pointed to by data */ |
a0d0e21e LW |
3406 | |
3407 | first = scan; | |
c277df42 | 3408 | /* Skip introductions and multiplicators >= 1. */ |
a0d0e21e | 3409 | while ((OP(first) == OPEN && (sawopen = 1)) || |
653099ff | 3410 | /* An OR of *one* alternative - should not happen now. */ |
a0d0e21e | 3411 | (OP(first) == BRANCH && OP(regnext(first)) != BRANCH) || |
07be1b83 YO |
3412 | /* for now we can't handle lookbehind IFMATCH*/ |
3413 | (OP(first) == IFMATCH && !first->flags) || | |
a0d0e21e LW |
3414 | (OP(first) == PLUS) || |
3415 | (OP(first) == MINMOD) || | |
653099ff | 3416 | /* An {n,m} with n>0 */ |
07be1b83 YO |
3417 | (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ) |
3418 | { | |
3419 | DEBUG_PEEP("first:",first,0); | |
a0d0e21e LW |
3420 | if (OP(first) == PLUS) |
3421 | sawplus = 1; | |
3422 | else | |
3dab1dad | 3423 | first += regarglen[OP(first)]; |
07be1b83 YO |
3424 | if (OP(first) == IFMATCH) { |
3425 | first = NEXTOPER(first); | |
3426 | first += EXTRA_STEP_2ARGS; | |
7c167cea | 3427 | } else /* XXX possible optimisation for /(?=)/ */ |
07be1b83 | 3428 | first = NEXTOPER(first); |
a687059c LW |
3429 | } |
3430 | ||
a0d0e21e LW |
3431 | /* Starting-point info. */ |
3432 | again: | |
07be1b83 | 3433 | /* Ignore EXACT as we deal with it later. */ |
3dab1dad | 3434 | if (PL_regkind[OP(first)] == EXACT) { |
1aa99e6b | 3435 | if (OP(first) == EXACT) |
6f207bd3 | 3436 | NOOP; /* Empty, get anchored substr later. */ |
1aa99e6b | 3437 | else if ((OP(first) == EXACTF || OP(first) == EXACTFL)) |
b3c9acc1 IZ |
3438 | r->regstclass = first; |
3439 | } | |
07be1b83 YO |
3440 | #ifdef TRIE_STCLASS |
3441 | else if (OP(first) == TRIE && | |
3442 | ((reg_trie_data *)r->data->data[ ARG(first) ])->minlen>0) | |
3443 | { | |
3444 | /* this can happen only on restudy */ | |
3445 | struct regnode_1 *trie_op; | |
3446 | Newxz(trie_op,1,struct regnode_1); | |
3447 | StructCopy(first,trie_op,struct regnode_1); | |
3448 | make_trie_failtable(pRExC_state, (regnode *)first, (regnode *)trie_op, 0); | |
3449 | r->regstclass = (regnode *)trie_op; | |
3450 | } | |
3451 | #endif | |
bfed75c6 | 3452 | else if (strchr((const char*)PL_simple,OP(first))) |
a0d0e21e | 3453 | r->regstclass = first; |
3dab1dad YO |
3454 | else if (PL_regkind[OP(first)] == BOUND || |
3455 | PL_regkind[OP(first)] == NBOUND) | |
a0d0e21e | 3456 | r->regstclass = first; |
3dab1dad | 3457 | else if (PL_regkind[OP(first)] == BOL) { |
cad2e5aa JH |
3458 | r->reganch |= (OP(first) == MBOL |
3459 | ? ROPT_ANCH_MBOL | |
3460 | : (OP(first) == SBOL | |
3461 | ? ROPT_ANCH_SBOL | |
3462 | : ROPT_ANCH_BOL)); | |
a0d0e21e | 3463 | first = NEXTOPER(first); |
774d564b | 3464 | goto again; |
3465 | } | |
3466 | else if (OP(first) == GPOS) { | |
3467 | r->reganch |= ROPT_ANCH_GPOS; | |
3468 | first = NEXTOPER(first); | |
3469 | goto again; | |
a0d0e21e | 3470 | } |
e09294f4 | 3471 | else if (!sawopen && (OP(first) == STAR && |
3dab1dad | 3472 | PL_regkind[OP(NEXTOPER(first))] == REG_ANY) && |
a0d0e21e LW |
3473 | !(r->reganch & ROPT_ANCH) ) |
3474 | { | |
3475 | /* turn .* into ^.* with an implied $*=1 */ | |
1df70142 AL |
3476 | const int type = |
3477 | (OP(NEXTOPER(first)) == REG_ANY) | |
3478 | ? ROPT_ANCH_MBOL | |
3479 | : ROPT_ANCH_SBOL; | |
cad2e5aa | 3480 | r->reganch |= type | ROPT_IMPLICIT; |
a0d0e21e | 3481 | first = NEXTOPER(first); |
774d564b | 3482 | goto again; |
a0d0e21e | 3483 | } |
b81d288d | 3484 | if (sawplus && (!sawopen || !RExC_sawback) |
830247a4 | 3485 | && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */ |
cad2e5aa JH |
3486 | /* x+ must match at the 1st pos of run of x's */ |
3487 | r->reganch |= ROPT_SKIP; | |
a0d0e21e | 3488 | |
c277df42 | 3489 | /* Scan is after the zeroth branch, first is atomic matcher. */ |
be8e71aa YO |
3490 | #ifdef TRIE_STUDY_OPT |
3491 | DEBUG_COMPILE_r( | |
3492 | if (!restudied) | |
3493 | PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", | |
3494 | (IV)(first - scan + 1)) | |
3495 | ); | |
3496 | #else | |
3497 | DEBUG_COMPILE_r( | |
3498 | PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", | |
3499 | (IV)(first - scan + 1)) | |
3500 | ); | |
3501 | #endif | |
3502 | ||
3503 | ||
a0d0e21e LW |
3504 | /* |
3505 | * If there's something expensive in the r.e., find the | |
3506 | * longest literal string that must appear and make it the | |
3507 | * regmust. Resolve ties in favor of later strings, since | |
3508 | * the regstart check works with the beginning of the r.e. | |
3509 | * and avoiding duplication strengthens checking. Not a | |
3510 | * strong reason, but sufficient in the absence of others. | |
3511 | * [Now we resolve ties in favor of the earlier string if | |
c277df42 | 3512 | * it happens that c_offset_min has been invalidated, since the |
a0d0e21e LW |
3513 | * earlier string may buy us something the later one won't.] |
3514 | */ | |
a0d0e21e | 3515 | minlen = 0; |
a687059c | 3516 | |
396482e1 GA |
3517 | data.longest_fixed = newSVpvs(""); |
3518 | data.longest_float = newSVpvs(""); | |
3519 | data.last_found = newSVpvs(""); | |
c277df42 IZ |
3520 | data.longest = &(data.longest_fixed); |
3521 | first = scan; | |
653099ff | 3522 | if (!r->regstclass) { |
830247a4 | 3523 | cl_init(pRExC_state, &ch_class); |
653099ff GS |
3524 | data.start_class = &ch_class; |
3525 | stclass_flag = SCF_DO_STCLASS_AND; | |
3526 | } else /* XXXX Check for BOUND? */ | |
3527 | stclass_flag = 0; | |
cb434fcc | 3528 | data.last_closep = &last_close; |
653099ff | 3529 | |
830247a4 | 3530 | minlen = study_chunk(pRExC_state, &first, &fake, scan + RExC_size, /* Up to end */ |
a3621e74 | 3531 | &data, SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0); |
07be1b83 YO |
3532 | |
3533 | #ifdef TRIE_STUDY_OPT | |
3534 | if ( (data.flags & SCF_EXACT_TRIE) && ! restudied++ ) { | |
3535 | goto reStudy; | |
3536 | } | |
3537 | #endif | |
3538 | ||
830247a4 | 3539 | if ( RExC_npar == 1 && data.longest == &(data.longest_fixed) |
b81d288d | 3540 | && data.last_start_min == 0 && data.last_end > 0 |
830247a4 IZ |
3541 | && !RExC_seen_zerolen |
3542 | && (!(RExC_seen & REG_SEEN_GPOS) || (r->reganch & ROPT_ANCH_GPOS))) | |
c277df42 | 3543 | r->reganch |= ROPT_CHECK_ALL; |
830247a4 | 3544 | scan_commit(pRExC_state, &data); |
c277df42 IZ |
3545 | SvREFCNT_dec(data.last_found); |
3546 | ||
a0ed51b3 | 3547 | longest_float_length = CHR_SVLEN(data.longest_float); |
c5254dd6 | 3548 | if (longest_float_length |
c277df42 IZ |
3549 | || (data.flags & SF_FL_BEFORE_EOL |
3550 | && (!(data.flags & SF_FL_BEFORE_MEOL) | |
e2509266 | 3551 | || (RExC_flags & PMf_MULTILINE)))) { |
cf93c79d IZ |
3552 | int t; |
3553 | ||
a0ed51b3 | 3554 | if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */ |
aca2d497 IZ |
3555 | && data.offset_fixed == data.offset_float_min |
3556 | && SvCUR(data.longest_fixed) == SvCUR(data.longest_float)) | |
3557 | goto remove_float; /* As in (a)+. */ | |
3558 | ||
33b8afdf JH |
3559 | if (SvUTF8(data.longest_float)) { |
3560 | r->float_utf8 = data.longest_float; | |
c445ea15 | 3561 | r->float_substr = NULL; |
33b8afdf JH |
3562 | } else { |
3563 | r->float_substr = data.longest_float; | |
c445ea15 | 3564 | r->float_utf8 = NULL; |
33b8afdf | 3565 | } |
c277df42 IZ |
3566 | r->float_min_offset = data.offset_float_min; |
3567 | r->float_max_offset = data.offset_float_max; | |
cf93c79d IZ |
3568 | t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */ |
3569 | && (!(data.flags & SF_FL_BEFORE_MEOL) | |
e2509266 | 3570 | || (RExC_flags & PMf_MULTILINE))); |
33b8afdf | 3571 | fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0); |
a0ed51b3 LW |
3572 | } |
3573 | else { | |
aca2d497 | 3574 | remove_float: |
c445ea15 | 3575 | r->float_substr = r->float_utf8 = NULL; |
c277df42 | 3576 | SvREFCNT_dec(data.longest_float); |
c5254dd6 | 3577 | longest_float_length = 0; |
a0d0e21e | 3578 | } |
c277df42 | 3579 | |
a0ed51b3 | 3580 | longest_fixed_length = CHR_SVLEN(data.longest_fixed); |
c5254dd6 | 3581 | if (longest_fixed_length |
c277df42 IZ |
3582 | || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */ |
3583 | && (!(data.flags & SF_FIX_BEFORE_MEOL) | |
e2509266 | 3584 | || (RExC_flags & PMf_MULTILINE)))) { |
cf93c79d IZ |
3585 | int t; |
3586 | ||
33b8afdf JH |
3587 | if (SvUTF8(data.longest_fixed)) { |
3588 | r->anchored_utf8 = data.longest_fixed; | |
c445ea15 | 3589 | r->anchored_substr = NULL; |
33b8afdf JH |
3590 | } else { |
3591 | r->anchored_substr = data.longest_fixed; | |
c445ea15 | 3592 | r->anchored_utf8 = NULL; |
33b8afdf | 3593 | } |
c277df42 | 3594 | r->anchored_offset = data.offset_fixed; |
cf93c79d IZ |
3595 | t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */ |
3596 | && (!(data.flags & SF_FIX_BEFORE_MEOL) | |
e2509266 | 3597 | || (RExC_flags & PMf_MULTILINE))); |
33b8afdf | 3598 | fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0); |
a0ed51b3 LW |
3599 | } |
3600 | else { | |
c445ea15 | 3601 | r->anchored_substr = r->anchored_utf8 = NULL; |
c277df42 | 3602 | SvREFCNT_dec(data.longest_fixed); |
c5254dd6 | 3603 | longest_fixed_length = 0; |
a0d0e21e | 3604 | } |
b81d288d | 3605 | if (r->regstclass |
ffc61ed2 | 3606 | && (OP(r->regstclass) == REG_ANY || OP(r->regstclass) == SANY)) |
653099ff | 3607 | r->regstclass = NULL; |
33b8afdf JH |
3608 | if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset) |
3609 | && stclass_flag | |
653099ff | 3610 | && !(data.start_class->flags & ANYOF_EOS) |
eb160463 GS |
3611 | && !cl_is_anything(data.start_class)) |
3612 | { | |
1df70142 | 3613 | const I32 n = add_data(pRExC_state, 1, "f"); |
653099ff | 3614 | |
a02a5408 | 3615 | Newx(RExC_rx->data->data[n], 1, |
653099ff GS |
3616 | struct regnode_charclass_class); |
3617 | StructCopy(data.start_class, | |
830247a4 | 3618 | (struct regnode_charclass_class*)RExC_rx->data->data[n], |
653099ff | 3619 | struct regnode_charclass_class); |
830247a4 | 3620 | r->regstclass = (regnode*)RExC_rx->data->data[n]; |
653099ff | 3621 | r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */ |
a3621e74 | 3622 | DEBUG_COMPILE_r({ SV *sv = sv_newmortal(); |
32fc9b6a | 3623 | regprop(r, sv, (regnode*)data.start_class); |
9c5ffd7c | 3624 | PerlIO_printf(Perl_debug_log, |
a0288114 | 3625 | "synthetic stclass \"%s\".\n", |
3f7c398e | 3626 | SvPVX_const(sv));}); |
653099ff | 3627 | } |
c277df42 IZ |
3628 | |
3629 | /* A temporary algorithm prefers floated substr to fixed one to dig more info. */ | |
c5254dd6 | 3630 | if (longest_fixed_length > longest_float_length) { |
c277df42 | 3631 | r->check_substr = r->anchored_substr; |
33b8afdf | 3632 | r->check_utf8 = r->anchored_utf8; |
c277df42 IZ |
3633 | r->check_offset_min = r->check_offset_max = r->anchored_offset; |
3634 | if (r->reganch & ROPT_ANCH_SINGLE) | |
3635 | r->reganch |= ROPT_NOSCAN; | |
a0ed51b3 LW |
3636 | } |
3637 | else { | |
c277df42 | 3638 | r->check_substr = r->float_substr; |
33b8afdf | 3639 | r->check_utf8 = r->float_utf8; |
c277df42 IZ |
3640 | r->check_offset_min = data.offset_float_min; |
3641 | r->check_offset_max = data.offset_float_max; | |
a0d0e21e | 3642 | } |
30382c73 IZ |
3643 | /* XXXX Currently intuiting is not compatible with ANCH_GPOS. |
3644 | This should be changed ASAP! */ | |
33b8afdf | 3645 | if ((r->check_substr || r->check_utf8) && !(r->reganch & ROPT_ANCH_GPOS)) { |
cad2e5aa | 3646 | r->reganch |= RE_USE_INTUIT; |
33b8afdf | 3647 | if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8)) |
cad2e5aa JH |
3648 | r->reganch |= RE_INTUIT_TAIL; |
3649 | } | |
a0ed51b3 LW |
3650 | } |
3651 | else { | |
c277df42 IZ |
3652 | /* Several toplevels. Best we can is to set minlen. */ |
3653 | I32 fake; | |
653099ff | 3654 | struct regnode_charclass_class ch_class; |
cb434fcc | 3655 | I32 last_close = 0; |
c277df42 | 3656 | |
a3621e74 | 3657 | DEBUG_COMPILE_r(PerlIO_printf(Perl_debug_log, "\n")); |
07be1b83 | 3658 | |
c277df42 | 3659 | scan = r->program + 1; |
830247a4 | 3660 | cl_init(pRExC_state, &ch_class); |
653099ff | 3661 | data.start_class = &ch_class; |
cb434fcc | 3662 | data.last_closep = &last_close; |
07be1b83 YO |
3663 | |
3664 | minlen = study_chunk(pRExC_state, &scan, &fake, scan + RExC_size, | |
3665 | &data, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0); | |
3666 | ||
3667 | #ifdef TRIE_STUDY_OPT | |
3668 | if ( (data.flags & SCF_EXACT_TRIE) && ! restudied++ ) { | |
3669 | goto reStudy; | |
3670 | } | |
3671 | #endif | |
3672 | ||
33b8afdf | 3673 | r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8 |
c445ea15 | 3674 | = r->float_substr = r->float_utf8 = NULL; |
653099ff | 3675 | if (!(data.start_class->flags & ANYOF_EOS) |
eb160463 GS |
3676 | && !cl_is_anything(data.start_class)) |
3677 | { | |
1df70142 | 3678 | const I32 n = add_data(pRExC_state, 1, "f"); |
653099ff | 3679 | |
a02a5408 | 3680 | Newx(RExC_rx->data->data[n], 1, |
653099ff GS |
3681 | struct regnode_charclass_class); |
3682 | StructCopy(data.start_class, | |
830247a4 | 3683 | (struct regnode_charclass_class*)RExC_rx->data->data[n], |
653099ff | 3684 | struct regnode_charclass_class); |
830247a4 | 3685 | r->regstclass = (regnode*)RExC_rx->data->data[n]; |
653099ff | 3686 | r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */ |
a3621e74 | 3687 | DEBUG_COMPILE_r({ SV* sv = sv_newmortal(); |
32fc9b6a | 3688 | regprop(r, sv, (regnode*)data.start_class); |
9c5ffd7c | 3689 | PerlIO_printf(Perl_debug_log, |
a0288114 | 3690 | "synthetic stclass \"%s\".\n", |
3f7c398e | 3691 | SvPVX_const(sv));}); |
653099ff | 3692 | } |
a0d0e21e LW |
3693 | } |
3694 | ||
a0d0e21e | 3695 | r->minlen = minlen; |
b81d288d | 3696 | if (RExC_seen & REG_SEEN_GPOS) |
c277df42 | 3697 | r->reganch |= ROPT_GPOS_SEEN; |
830247a4 | 3698 | if (RExC_seen & REG_SEEN_LOOKBEHIND) |
c277df42 | 3699 | r->reganch |= ROPT_LOOKBEHIND_SEEN; |
830247a4 | 3700 | if (RExC_seen & REG_SEEN_EVAL) |
ce862d02 | 3701 | r->reganch |= ROPT_EVAL_SEEN; |
f33976b4 DB |
3702 | if (RExC_seen & REG_SEEN_CANY) |
3703 | r->reganch |= ROPT_CANY_SEEN; | |
a02a5408 JC |
3704 | Newxz(r->startp, RExC_npar, I32); |
3705 | Newxz(r->endp, RExC_npar, I32); | |
07be1b83 | 3706 | |
f2278c82 | 3707 | DEBUG_r( RX_DEBUG_on(r) ); |
be8e71aa YO |
3708 | DEBUG_DUMP_r({ |
3709 | PerlIO_printf(Perl_debug_log,"Final program:\n"); | |
3dab1dad YO |
3710 | regdump(r); |
3711 | }); | |
8e9a8a48 YO |
3712 | DEBUG_OFFSETS_r(if (r->offsets) { |
3713 | const U32 len = r->offsets[0]; | |
3714 | U32 i; | |
3715 | GET_RE_DEBUG_FLAGS_DECL; | |
3716 | PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)r->offsets[0]); | |
3717 | for (i = 1; i <= len; i++) { | |
3718 | if (r->offsets[i*2-1] || r->offsets[i*2]) | |
3719 | PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ", | |
3720 | i, (UV)r->offsets[i*2-1], (UV)r->offsets[i*2]); | |
3721 | } | |
3722 | PerlIO_printf(Perl_debug_log, "\n"); | |
3723 | }); | |
a0d0e21e | 3724 | return(r); |
a687059c LW |
3725 | } |
3726 | ||
3dab1dad YO |
3727 | |
3728 | #define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \ | |
3729 | int rem=(int)(RExC_end - RExC_parse); \ | |
3730 | int cut; \ | |
3731 | int num; \ | |
3732 | int iscut=0; \ | |
3733 | if (rem>10) { \ | |
3734 | rem=10; \ | |
3735 | iscut=1; \ | |
3736 | } \ | |
3737 | cut=10-rem; \ | |
3738 | if (RExC_lastparse!=RExC_parse) \ | |
3739 | PerlIO_printf(Perl_debug_log," >%.*s%-*s", \ | |
3740 | rem, RExC_parse, \ | |
3741 | cut + 4, \ | |
3742 | iscut ? "..." : "<" \ | |
3743 | ); \ | |
3744 | else \ | |
3745 | PerlIO_printf(Perl_debug_log,"%16s",""); \ | |
3746 | \ | |
3747 | if (SIZE_ONLY) \ | |
3748 | num=RExC_size; \ | |
3749 | else \ | |
3750 | num=REG_NODE_NUM(RExC_emit); \ | |
3751 | if (RExC_lastnum!=num) \ | |
be8e71aa | 3752 | PerlIO_printf(Perl_debug_log,"|%4d",num); \ |
3dab1dad | 3753 | else \ |
be8e71aa YO |
3754 | PerlIO_printf(Perl_debug_log,"|%4s",""); \ |
3755 | PerlIO_printf(Perl_debug_log,"|%*s%-4s", \ | |
3756 | (int)((depth*2)), "", \ | |
3dab1dad YO |
3757 | (funcname) \ |
3758 | ); \ | |
3759 | RExC_lastnum=num; \ | |
3760 | RExC_lastparse=RExC_parse; \ | |
3761 | }) | |
3762 | ||
07be1b83 YO |
3763 | |
3764 | ||
3dab1dad YO |
3765 | #define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \ |
3766 | DEBUG_PARSE_MSG((funcname)); \ | |
3767 | PerlIO_printf(Perl_debug_log,"%4s","\n"); \ | |
3768 | }) | |
a687059c LW |
3769 | /* |
3770 | - reg - regular expression, i.e. main body or parenthesized thing | |
3771 | * | |
3772 | * Caller must absorb opening parenthesis. | |
3773 | * | |
3774 | * Combining parenthesis handling with the base level of regular expression | |
3775 | * is a trifle forced, but the need to tie the tails of the branches to what | |
3776 | * follows makes it hard to avoid. | |
3777 | */ | |
07be1b83 YO |
3778 | #define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1) |
3779 | #ifdef DEBUGGING | |
3780 | #define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1) | |
3781 | #else | |
3782 | #define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1) | |
3783 | #endif | |
3dab1dad | 3784 | |
76e3520e | 3785 | STATIC regnode * |
3dab1dad | 3786 | S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth) |
c277df42 | 3787 | /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */ |
a687059c | 3788 | { |
27da23d5 | 3789 | dVAR; |
c277df42 IZ |
3790 | register regnode *ret; /* Will be the head of the group. */ |
3791 | register regnode *br; | |
3792 | register regnode *lastbr; | |
cbbf8932 | 3793 | register regnode *ender = NULL; |
a0d0e21e | 3794 | register I32 parno = 0; |
cbbf8932 AL |
3795 | I32 flags; |
3796 | const I32 oregflags = RExC_flags; | |
6136c704 AL |
3797 | bool have_branch = 0; |
3798 | bool is_open = 0; | |
9d1d55b5 JP |
3799 | |
3800 | /* for (?g), (?gc), and (?o) warnings; warning | |
3801 | about (?c) will warn about (?g) -- japhy */ | |
3802 | ||
6136c704 AL |
3803 | #define WASTED_O 0x01 |
3804 | #define WASTED_G 0x02 | |
3805 | #define WASTED_C 0x04 | |
3806 | #define WASTED_GC (0x02|0x04) | |
cbbf8932 | 3807 | I32 wastedflags = 0x00; |
9d1d55b5 | 3808 | |
fac92740 | 3809 | char * parse_start = RExC_parse; /* MJD */ |
a28509cc | 3810 | char * const oregcomp_parse = RExC_parse; |
a0d0e21e | 3811 | |
3dab1dad YO |
3812 | GET_RE_DEBUG_FLAGS_DECL; |
3813 | DEBUG_PARSE("reg "); | |
3814 | ||
3815 | ||
821b33a5 | 3816 | *flagp = 0; /* Tentatively. */ |
a0d0e21e | 3817 | |
9d1d55b5 | 3818 | |
a0d0e21e LW |
3819 | /* Make an OPEN node, if parenthesized. */ |
3820 | if (paren) { | |
fac92740 | 3821 | if (*RExC_parse == '?') { /* (?...) */ |
2b36a5a0 JH |
3822 | U32 posflags = 0, negflags = 0; |
3823 | U32 *flagsp = &posflags; | |
6136c704 | 3824 | bool is_logical = 0; |
a28509cc | 3825 | const char * const seqstart = RExC_parse; |
ca9dfc88 | 3826 | |
830247a4 IZ |
3827 | RExC_parse++; |
3828 | paren = *RExC_parse++; | |
c277df42 | 3829 | ret = NULL; /* For look-ahead/behind. */ |
a0d0e21e | 3830 | switch (paren) { |
fac92740 | 3831 | case '<': /* (?<...) */ |
830247a4 | 3832 | RExC_seen |= REG_SEEN_LOOKBEHIND; |
b81d288d | 3833 | if (*RExC_parse == '!') |
c277df42 | 3834 | paren = ','; |
b81d288d | 3835 | if (*RExC_parse != '=' && *RExC_parse != '!') |
c277df42 | 3836 | goto unknown; |
830247a4 | 3837 | RExC_parse++; |
fac92740 MJD |
3838 | case '=': /* (?=...) */ |
3839 | case '!': /* (?!...) */ | |
830247a4 | 3840 | RExC_seen_zerolen++; |
fac92740 MJD |
3841 | case ':': /* (?:...) */ |
3842 | case '>': /* (?>...) */ | |
a0d0e21e | 3843 | break; |
fac92740 MJD |
3844 | case '$': /* (?$...) */ |
3845 | case '@': /* (?@...) */ | |
8615cb43 | 3846 | vFAIL2("Sequence (?%c...) not implemented", (int)paren); |
a0d0e21e | 3847 | break; |
fac92740 | 3848 | case '#': /* (?#...) */ |
830247a4 IZ |
3849 | while (*RExC_parse && *RExC_parse != ')') |
3850 | RExC_parse++; | |
3851 | if (*RExC_parse != ')') | |
c277df42 | 3852 | FAIL("Sequence (?#... not terminated"); |
830247a4 | 3853 | nextchar(pRExC_state); |
a0d0e21e LW |
3854 | *flagp = TRYAGAIN; |
3855 | return NULL; | |
fac92740 | 3856 | case 'p': /* (?p...) */ |
9014280d | 3857 | if (SIZE_ONLY && ckWARN2(WARN_DEPRECATED, WARN_REGEXP)) |
f9373011 | 3858 | vWARNdep(RExC_parse, "(?p{}) is deprecated - use (??{})"); |
8c8ad484 | 3859 | /* FALL THROUGH*/ |
fac92740 | 3860 | case '?': /* (??...) */ |
6136c704 | 3861 | is_logical = 1; |
438a3801 YST |
3862 | if (*RExC_parse != '{') |
3863 | goto unknown; | |
830247a4 | 3864 | paren = *RExC_parse++; |
0f5d15d6 | 3865 | /* FALL THROUGH */ |
fac92740 | 3866 | case '{': /* (?{...}) */ |
c277df42 | 3867 | { |
c277df42 IZ |
3868 | I32 count = 1, n = 0; |
3869 | char c; | |
830247a4 | 3870 | char *s = RExC_parse; |
c277df42 | 3871 | |
830247a4 IZ |
3872 | RExC_seen_zerolen++; |
3873 | RExC_seen |= REG_SEEN_EVAL; | |
3874 | while (count && (c = *RExC_parse)) { | |
6136c704 AL |
3875 | if (c == '\\') { |
3876 | if (RExC_parse[1]) | |
3877 | RExC_parse++; | |
3878 | } | |
b81d288d | 3879 | else if (c == '{') |
c277df42 | 3880 | count++; |
b81d288d | 3881 | else if (c == '}') |
c277df42 | 3882 | count--; |
830247a4 | 3883 | RExC_parse++; |
c277df42 | 3884 | } |
6136c704 | 3885 | if (*RExC_parse != ')') { |
b81d288d | 3886 | RExC_parse = s; |
b45f050a JF |
3887 | vFAIL("Sequence (?{...}) not terminated or not {}-balanced"); |
3888 | } | |
c277df42 | 3889 | if (!SIZE_ONLY) { |
f3548bdc | 3890 | PAD *pad; |
6136c704 AL |
3891 | OP_4tree *sop, *rop; |
3892 | SV * const sv = newSVpvn(s, RExC_parse - 1 - s); | |
c277df42 | 3893 | |
569233ed SB |
3894 | ENTER; |
3895 | Perl_save_re_context(aTHX); | |
f3548bdc | 3896 | rop = sv_compile_2op(sv, &sop, "re", &pad); |
9b978d73 DM |
3897 | sop->op_private |= OPpREFCOUNTED; |
3898 | /* re_dup will OpREFCNT_inc */ | |
3899 | OpREFCNT_set(sop, 1); | |
569233ed | 3900 | LEAVE; |
c277df42 | 3901 | |
830247a4 IZ |
3902 | n = add_data(pRExC_state, 3, "nop"); |
3903 | RExC_rx->data->data[n] = (void*)rop; | |
3904 | RExC_rx->data->data[n+1] = (void*)sop; | |
f3548bdc | 3905 | RExC_rx->data->data[n+2] = (void*)pad; |
c277df42 | 3906 | SvREFCNT_dec(sv); |
a0ed51b3 | 3907 | } |
e24b16f9 | 3908 | else { /* First pass */ |
830247a4 | 3909 | if (PL_reginterp_cnt < ++RExC_seen_evals |
923e4eb5 | 3910 | && IN_PERL_RUNTIME) |
2cd61cdb IZ |
3911 | /* No compiled RE interpolated, has runtime |
3912 | components ===> unsafe. */ | |
3913 | FAIL("Eval-group not allowed at runtime, use re 'eval'"); | |
5b61d3f7 | 3914 | if (PL_tainting && PL_tainted) |
cc6b7395 | 3915 | FAIL("Eval-group in insecure regular expression"); |
54df2634 | 3916 | #if PERL_VERSION > 8 |
923e4eb5 | 3917 | if (IN_PERL_COMPILETIME) |
b5c19bd7 | 3918 | PL_cv_has_eval = 1; |
54df2634 | 3919 | #endif |
c277df42 | 3920 | } |
b5c19bd7 | 3921 | |
830247a4 | 3922 | nextchar(pRExC_state); |
6136c704 | 3923 | if (is_logical) { |
830247a4 | 3924 | ret = reg_node(pRExC_state, LOGICAL); |
0f5d15d6 IZ |
3925 | if (!SIZE_ONLY) |
3926 | ret->flags = 2; | |
3dab1dad | 3927 | REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n)); |
fac92740 | 3928 | /* deal with the length of this later - MJD */ |
0f5d15d6 IZ |
3929 | return ret; |
3930 | } | |
ccb2c380 MP |
3931 | ret = reganode(pRExC_state, EVAL, n); |
3932 | Set_Node_Length(ret, RExC_parse - parse_start + 1); | |
3933 | Set_Node_Offset(ret, parse_start); | |
3934 | return ret; | |
c277df42 | 3935 | } |
fac92740 | 3936 | case '(': /* (?(?{...})...) and (?(?=...)...) */ |
c277df42 | 3937 | { |
fac92740 | 3938 | if (RExC_parse[0] == '?') { /* (?(?...)) */ |
b81d288d AB |
3939 | if (RExC_parse[1] == '=' || RExC_parse[1] == '!' |
3940 | || RExC_parse[1] == '<' | |
830247a4 | 3941 | || RExC_parse[1] == '{') { /* Lookahead or eval. */ |
c277df42 IZ |
3942 | I32 flag; |
3943 | ||
830247a4 | 3944 | ret = reg_node(pRExC_state, LOGICAL); |
0f5d15d6 IZ |
3945 | if (!SIZE_ONLY) |
3946 | ret->flags = 1; | |
3dab1dad | 3947 | REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1)); |
c277df42 | 3948 | goto insert_if; |
b81d288d | 3949 | } |
a0ed51b3 | 3950 | } |
830247a4 | 3951 | else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) { |
fac92740 | 3952 | /* (?(1)...) */ |
6136c704 | 3953 | char c; |
830247a4 | 3954 | parno = atoi(RExC_parse++); |
c277df42 | 3955 | |
830247a4 IZ |
3956 | while (isDIGIT(*RExC_parse)) |
3957 | RExC_parse++; | |
fac92740 | 3958 | ret = reganode(pRExC_state, GROUPP, parno); |
2af232bd | 3959 | |
830247a4 | 3960 | if ((c = *nextchar(pRExC_state)) != ')') |
b45f050a | 3961 | vFAIL("Switch condition not recognized"); |
c277df42 | 3962 | insert_if: |
3dab1dad YO |
3963 | REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0)); |
3964 | br = regbranch(pRExC_state, &flags, 1,depth+1); | |
c277df42 | 3965 | if (br == NULL) |
830247a4 | 3966 | br = reganode(pRExC_state, LONGJMP, 0); |
c277df42 | 3967 | else |
3dab1dad | 3968 | REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0)); |
830247a4 | 3969 | c = *nextchar(pRExC_state); |
d1b80229 IZ |
3970 | if (flags&HASWIDTH) |
3971 | *flagp |= HASWIDTH; | |
c277df42 | 3972 | if (c == '|') { |
830247a4 | 3973 | lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */ |
3dab1dad YO |
3974 | regbranch(pRExC_state, &flags, 1,depth+1); |
3975 | REGTAIL(pRExC_state, ret, lastbr); | |
d1b80229 IZ |
3976 | if (flags&HASWIDTH) |
3977 | *flagp |= HASWIDTH; | |
830247a4 | 3978 | c = *nextchar(pRExC_state); |
a0ed51b3 LW |
3979 | } |
3980 | else | |
c277df42 IZ |
3981 | lastbr = NULL; |
3982 | if (c != ')') | |
8615cb43 | 3983 | vFAIL("Switch (?(condition)... contains too many branches"); |
830247a4 | 3984 | ender = reg_node(pRExC_state, TAIL); |
3dab1dad | 3985 | REGTAIL(pRExC_state, br, ender); |
c277df42 | 3986 | if (lastbr) { |
3dab1dad YO |
3987 | REGTAIL(pRExC_state, lastbr, ender); |
3988 | REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); | |
a0ed51b3 LW |
3989 | } |
3990 | else | |
3dab1dad | 3991 | REGTAIL(pRExC_state, ret, ender); |
c277df42 | 3992 | return ret; |
a0ed51b3 LW |
3993 | } |
3994 | else { | |
830247a4 | 3995 | vFAIL2("Unknown switch condition (?(%.2s", RExC_parse); |
c277df42 IZ |
3996 | } |
3997 | } | |
1b1626e4 | 3998 | case 0: |
830247a4 | 3999 | RExC_parse--; /* for vFAIL to print correctly */ |
8615cb43 | 4000 | vFAIL("Sequence (? incomplete"); |
1b1626e4 | 4001 | break; |
a0d0e21e | 4002 | default: |
830247a4 | 4003 | --RExC_parse; |
fac92740 | 4004 | parse_flags: /* (?i) */ |
830247a4 | 4005 | while (*RExC_parse && strchr("iogcmsx", *RExC_parse)) { |
9d1d55b5 JP |
4006 | /* (?g), (?gc) and (?o) are useless here |
4007 | and must be globally applied -- japhy */ | |
4008 | ||
4009 | if (*RExC_parse == 'o' || *RExC_parse == 'g') { | |
4010 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { | |
6136c704 | 4011 | const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G; |
9d1d55b5 JP |
4012 | if (! (wastedflags & wflagbit) ) { |
4013 | wastedflags |= wflagbit; | |
4014 | vWARN5( | |
4015 | RExC_parse + 1, | |
4016 | "Useless (%s%c) - %suse /%c modifier", | |
4017 | flagsp == &negflags ? "?-" : "?", | |
4018 | *RExC_parse, | |
4019 | flagsp == &negflags ? "don't " : "", | |
4020 | *RExC_parse | |
4021 | ); | |
4022 | } | |
4023 | } | |
4024 | } | |
4025 | else if (*RExC_parse == 'c') { | |
4026 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { | |
6136c704 AL |
4027 | if (! (wastedflags & WASTED_C) ) { |
4028 | wastedflags |= WASTED_GC; | |
9d1d55b5 JP |
4029 | vWARN3( |
4030 | RExC_parse + 1, | |
4031 | "Useless (%sc) - %suse /gc modifier", | |
4032 | flagsp == &negflags ? "?-" : "?", | |
4033 | flagsp == &negflags ? "don't " : "" | |
4034 | ); | |
4035 | } | |
4036 | } | |
4037 | } | |
4038 | else { pmflag(flagsp, *RExC_parse); } | |
4039 | ||
830247a4 | 4040 | ++RExC_parse; |
ca9dfc88 | 4041 | } |
830247a4 | 4042 | if (*RExC_parse == '-') { |
ca9dfc88 | 4043 | flagsp = &negflags; |
9d1d55b5 | 4044 | wastedflags = 0; /* reset so (?g-c) warns twice */ |
830247a4 | 4045 | ++RExC_parse; |
ca9dfc88 | 4046 | goto parse_flags; |
48c036b1 | 4047 | } |
e2509266 JH |
4048 | RExC_flags |= posflags; |
4049 | RExC_flags &= ~negflags; | |
830247a4 IZ |
4050 | if (*RExC_parse == ':') { |
4051 | RExC_parse++; | |
ca9dfc88 IZ |
4052 | paren = ':'; |
4053 | break; | |
4054 | } | |
c277df42 | 4055 | unknown: |
830247a4 IZ |
4056 | if (*RExC_parse != ')') { |
4057 | RExC_parse++; | |
4058 | vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart); | |
b45f050a | 4059 | } |
830247a4 | 4060 | nextchar(pRExC_state); |
a0d0e21e LW |
4061 | *flagp = TRYAGAIN; |
4062 | return NULL; | |
4063 | } | |
4064 | } | |
fac92740 | 4065 | else { /* (...) */ |
830247a4 IZ |
4066 | parno = RExC_npar; |
4067 | RExC_npar++; | |
4068 | ret = reganode(pRExC_state, OPEN, parno); | |
fac92740 MJD |
4069 | Set_Node_Length(ret, 1); /* MJD */ |
4070 | Set_Node_Offset(ret, RExC_parse); /* MJD */ | |
6136c704 | 4071 | is_open = 1; |
a0d0e21e | 4072 | } |
a0ed51b3 | 4073 | } |
fac92740 | 4074 | else /* ! paren */ |
a0d0e21e LW |
4075 | ret = NULL; |
4076 | ||
4077 | /* Pick up the branches, linking them together. */ | |
fac92740 | 4078 | parse_start = RExC_parse; /* MJD */ |
3dab1dad | 4079 | br = regbranch(pRExC_state, &flags, 1,depth+1); |
fac92740 | 4080 | /* branch_len = (paren != 0); */ |
2af232bd | 4081 | |
a0d0e21e LW |
4082 | if (br == NULL) |
4083 | return(NULL); | |
830247a4 IZ |
4084 | if (*RExC_parse == '|') { |
4085 | if (!SIZE_ONLY && RExC_extralen) { | |
4086 | reginsert(pRExC_state, BRANCHJ, br); | |
a0ed51b3 | 4087 | } |
fac92740 | 4088 | else { /* MJD */ |
830247a4 | 4089 | reginsert(pRExC_state, BRANCH, br); |
fac92740 MJD |
4090 | Set_Node_Length(br, paren != 0); |
4091 | Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start); | |
4092 | } | |
c277df42 IZ |
4093 | have_branch = 1; |
4094 | if (SIZE_ONLY) | |
830247a4 | 4095 | RExC_extralen += 1; /* For BRANCHJ-BRANCH. */ |
a0ed51b3 LW |
4096 | } |
4097 | else if (paren == ':') { | |
c277df42 IZ |
4098 | *flagp |= flags&SIMPLE; |
4099 | } | |
6136c704 | 4100 | if (is_open) { /* Starts with OPEN. */ |
3dab1dad | 4101 | REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */ |
a0ed51b3 LW |
4102 | } |
4103 | else if (paren != '?') /* Not Conditional */ | |
a0d0e21e | 4104 | ret = br; |
32a0ca98 | 4105 | *flagp |= flags & (SPSTART | HASWIDTH); |
c277df42 | 4106 | lastbr = br; |
830247a4 IZ |
4107 | while (*RExC_parse == '|') { |
4108 | if (!SIZE_ONLY && RExC_extralen) { | |
4109 | ender = reganode(pRExC_state, LONGJMP,0); | |
3dab1dad | 4110 | REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */ |
c277df42 IZ |
4111 | } |
4112 | if (SIZE_ONLY) | |
830247a4 IZ |
4113 | RExC_extralen += 2; /* Account for LONGJMP. */ |
4114 | nextchar(pRExC_state); | |
3dab1dad | 4115 | br = regbranch(pRExC_state, &flags, 0, depth+1); |
2af232bd | 4116 | |
a687059c | 4117 | if (br == NULL) |
a0d0e21e | 4118 | return(NULL); |
3dab1dad | 4119 | REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */ |
c277df42 | 4120 | lastbr = br; |
821b33a5 IZ |
4121 | if (flags&HASWIDTH) |
4122 | *flagp |= HASWIDTH; | |
a687059c | 4123 | *flagp |= flags&SPSTART; |
a0d0e21e LW |
4124 | } |
4125 | ||
c277df42 IZ |
4126 | if (have_branch || paren != ':') { |
4127 | /* Make a closing node, and hook it on the end. */ | |
4128 | switch (paren) { | |
4129 | case ':': | |
830247a4 | 4130 | ender = reg_node(pRExC_state, TAIL); |
c277df42 IZ |
4131 | break; |
4132 | case 1: | |
830247a4 | 4133 | ender = reganode(pRExC_state, CLOSE, parno); |
fac92740 MJD |
4134 | Set_Node_Offset(ender,RExC_parse+1); /* MJD */ |
4135 | Set_Node_Length(ender,1); /* MJD */ | |
c277df42 IZ |
4136 | break; |
4137 | case '<': | |
c277df42 IZ |
4138 | case ',': |
4139 | case '=': | |
4140 | case '!': | |
c277df42 | 4141 | *flagp &= ~HASWIDTH; |
821b33a5 IZ |
4142 | /* FALL THROUGH */ |
4143 | case '>': | |
830247a4 | 4144 | ender = reg_node(pRExC_state, SUCCEED); |
c277df42 IZ |
4145 | break; |
4146 | case 0: | |
830247a4 | 4147 | ender = reg_node(pRExC_state, END); |
c277df42 IZ |
4148 | break; |
4149 | } | |
07be1b83 | 4150 | REGTAIL_STUDY(pRExC_state, lastbr, ender); |
a0d0e21e | 4151 | |
9674d46a | 4152 | if (have_branch && !SIZE_ONLY) { |
c277df42 | 4153 | /* Hook the tails of the branches to the closing node. */ |
9674d46a AL |
4154 | for (br = ret; br; br = regnext(br)) { |
4155 | const U8 op = PL_regkind[OP(br)]; | |
4156 | if (op == BRANCH) { | |
07be1b83 | 4157 | REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender); |
9674d46a AL |
4158 | } |
4159 | else if (op == BRANCHJ) { | |
07be1b83 | 4160 | REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender); |
9674d46a | 4161 | } |
c277df42 IZ |
4162 | } |
4163 | } | |
a0d0e21e | 4164 | } |
c277df42 IZ |
4165 | |
4166 | { | |
e1ec3a88 AL |
4167 | const char *p; |
4168 | static const char parens[] = "=!<,>"; | |
c277df42 IZ |
4169 | |
4170 | if (paren && (p = strchr(parens, paren))) { | |
eb160463 | 4171 | U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH; |
c277df42 IZ |
4172 | int flag = (p - parens) > 1; |
4173 | ||
4174 | if (paren == '>') | |
4175 | node = SUSPEND, flag = 0; | |
830247a4 | 4176 | reginsert(pRExC_state, node,ret); |
45948336 EP |
4177 | Set_Node_Cur_Length(ret); |
4178 | Set_Node_Offset(ret, parse_start + 1); | |
c277df42 | 4179 | ret->flags = flag; |
07be1b83 | 4180 | REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL)); |
c277df42 | 4181 | } |
a0d0e21e LW |
4182 | } |
4183 | ||
4184 | /* Check for proper termination. */ | |
ce3e6498 | 4185 | if (paren) { |
e2509266 | 4186 | RExC_flags = oregflags; |
830247a4 IZ |
4187 | if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') { |
4188 | RExC_parse = oregcomp_parse; | |
380a0633 | 4189 | vFAIL("Unmatched ("); |
ce3e6498 | 4190 | } |
a0ed51b3 | 4191 | } |
830247a4 IZ |
4192 | else if (!paren && RExC_parse < RExC_end) { |
4193 | if (*RExC_parse == ')') { | |
4194 | RExC_parse++; | |
380a0633 | 4195 | vFAIL("Unmatched )"); |
a0ed51b3 LW |
4196 | } |
4197 | else | |
b45f050a | 4198 | FAIL("Junk on end of regexp"); /* "Can't happen". */ |
a0d0e21e LW |
4199 | /* NOTREACHED */ |
4200 | } | |
a687059c | 4201 | |
a0d0e21e | 4202 | return(ret); |
a687059c LW |
4203 | } |
4204 | ||
4205 | /* | |
4206 | - regbranch - one alternative of an | operator | |
4207 | * | |
4208 | * Implements the concatenation operator. | |
4209 | */ | |
76e3520e | 4210 | STATIC regnode * |
3dab1dad | 4211 | S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth) |
a687059c | 4212 | { |
97aff369 | 4213 | dVAR; |
c277df42 IZ |
4214 | register regnode *ret; |
4215 | register regnode *chain = NULL; | |
4216 | register regnode *latest; | |
4217 | I32 flags = 0, c = 0; | |
3dab1dad YO |
4218 | GET_RE_DEBUG_FLAGS_DECL; |
4219 | DEBUG_PARSE("brnc"); | |
b81d288d | 4220 | if (first) |
c277df42 IZ |
4221 | ret = NULL; |
4222 | else { | |
b81d288d | 4223 | if (!SIZE_ONLY && RExC_extralen) |
830247a4 | 4224 | ret = reganode(pRExC_state, BRANCHJ,0); |
fac92740 | 4225 | else { |
830247a4 | 4226 | ret = reg_node(pRExC_state, BRANCH); |
fac92740 MJD |
4227 | Set_Node_Length(ret, 1); |
4228 | } | |
c277df42 IZ |
4229 | } |
4230 | ||
b81d288d | 4231 | if (!first && SIZE_ONLY) |
830247a4 | 4232 | RExC_extralen += 1; /* BRANCHJ */ |
b81d288d | 4233 | |
c277df42 | 4234 | *flagp = WORST; /* Tentatively. */ |
a0d0e21e | 4235 | |
830247a4 IZ |
4236 | RExC_parse--; |
4237 | nextchar(pRExC_state); | |
4238 | while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') { | |
a0d0e21e | 4239 | flags &= ~TRYAGAIN; |
3dab1dad | 4240 | latest = regpiece(pRExC_state, &flags,depth+1); |
a0d0e21e LW |
4241 | if (latest == NULL) { |
4242 | if (flags & TRYAGAIN) | |
4243 | continue; | |
4244 | return(NULL); | |
a0ed51b3 LW |
4245 | } |
4246 | else if (ret == NULL) | |
c277df42 | 4247 | ret = latest; |
a0d0e21e | 4248 | *flagp |= flags&HASWIDTH; |
c277df42 | 4249 | if (chain == NULL) /* First piece. */ |
a0d0e21e LW |
4250 | *flagp |= flags&SPSTART; |
4251 | else { | |
830247a4 | 4252 | RExC_naughty++; |
3dab1dad | 4253 | REGTAIL(pRExC_state, chain, latest); |
a687059c | 4254 | } |
a0d0e21e | 4255 | chain = latest; |
c277df42 IZ |
4256 | c++; |
4257 | } | |
4258 | if (chain == NULL) { /* Loop ran zero times. */ | |
830247a4 | 4259 | chain = reg_node(pRExC_state, NOTHING); |
c277df42 IZ |
4260 | if (ret == NULL) |
4261 | ret = chain; | |
4262 | } | |
4263 | if (c == 1) { | |
4264 | *flagp |= flags&SIMPLE; | |
a0d0e21e | 4265 | } |
a687059c | 4266 | |
d4c19fe8 | 4267 | return ret; |
a687059c LW |
4268 | } |
4269 | ||
4270 | /* | |
4271 | - regpiece - something followed by possible [*+?] | |
4272 | * | |
4273 | * Note that the branching code sequences used for ? and the general cases | |
4274 | * of * and + are somewhat optimized: they use the same NOTHING node as | |
4275 | * both the endmarker for their branch list and the body of the last branch. | |
4276 | * It might seem that this node could be dispensed with entirely, but the | |
4277 | * endmarker role is not redundant. | |
4278 | */ | |
76e3520e | 4279 | STATIC regnode * |
3dab1dad | 4280 | S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth) |
a687059c | 4281 | { |
97aff369 | 4282 | dVAR; |
c277df42 | 4283 | register regnode *ret; |
a0d0e21e LW |
4284 | register char op; |
4285 | register char *next; | |
4286 | I32 flags; | |
1df70142 | 4287 | const char * const origparse = RExC_parse; |
a0d0e21e | 4288 | I32 min; |
c277df42 | 4289 | I32 max = REG_INFTY; |
fac92740 | 4290 | char *parse_start; |
3dab1dad YO |
4291 | GET_RE_DEBUG_FLAGS_DECL; |
4292 | DEBUG_PARSE("piec"); | |
a0d0e21e | 4293 | |
3dab1dad | 4294 | ret = regatom(pRExC_state, &flags,depth+1); |
a0d0e21e LW |
4295 | if (ret == NULL) { |
4296 | if (flags & TRYAGAIN) | |
4297 | *flagp |= TRYAGAIN; | |
4298 | return(NULL); | |
4299 | } | |
4300 | ||
830247a4 | 4301 | op = *RExC_parse; |
a0d0e21e | 4302 | |
830247a4 | 4303 | if (op == '{' && regcurly(RExC_parse)) { |
3dab1dad | 4304 | const char *maxpos = NULL; |
fac92740 | 4305 | parse_start = RExC_parse; /* MJD */ |
830247a4 | 4306 | next = RExC_parse + 1; |
a0d0e21e LW |
4307 | while (isDIGIT(*next) || *next == ',') { |
4308 | if (*next == ',') { | |
4309 | if (maxpos) | |
4310 | break; | |
4311 | else | |
4312 | maxpos = next; | |
a687059c | 4313 | } |
a0d0e21e LW |
4314 | next++; |
4315 | } | |
4316 | if (*next == '}') { /* got one */ | |
4317 | if (!maxpos) | |
4318 | maxpos = next; | |
830247a4 IZ |
4319 | RExC_parse++; |
4320 | min = atoi(RExC_parse); | |
a0d0e21e LW |
4321 | if (*maxpos == ',') |
4322 | maxpos++; | |
4323 | else | |
830247a4 | 4324 | maxpos = RExC_parse; |
a0d0e21e LW |
4325 | max = atoi(maxpos); |
4326 | if (!max && *maxpos != '0') | |
c277df42 IZ |
4327 | max = REG_INFTY; /* meaning "infinity" */ |
4328 | else if (max >= REG_INFTY) | |
8615cb43 | 4329 | vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1); |
830247a4 IZ |
4330 | RExC_parse = next; |
4331 | nextchar(pRExC_state); | |
a0d0e21e LW |
4332 | |
4333 | do_curly: | |
4334 | if ((flags&SIMPLE)) { | |
830247a4 IZ |
4335 | RExC_naughty += 2 + RExC_naughty / 2; |
4336 | reginsert(pRExC_state, CURLY, ret); | |
fac92740 MJD |
4337 | Set_Node_Offset(ret, parse_start+1); /* MJD */ |
4338 | Set_Node_Cur_Length(ret); | |
a0d0e21e LW |
4339 | } |
4340 | else { | |
3dab1dad | 4341 | regnode * const w = reg_node(pRExC_state, WHILEM); |
2c2d71f5 JH |
4342 | |
4343 | w->flags = 0; | |
3dab1dad | 4344 | REGTAIL(pRExC_state, ret, w); |
830247a4 IZ |
4345 | if (!SIZE_ONLY && RExC_extralen) { |
4346 | reginsert(pRExC_state, LONGJMP,ret); | |
4347 | reginsert(pRExC_state, NOTHING,ret); | |
c277df42 IZ |
4348 | NEXT_OFF(ret) = 3; /* Go over LONGJMP. */ |
4349 | } | |
830247a4 | 4350 | reginsert(pRExC_state, CURLYX,ret); |
fac92740 MJD |
4351 | /* MJD hk */ |
4352 | Set_Node_Offset(ret, parse_start+1); | |
2af232bd | 4353 | Set_Node_Length(ret, |
fac92740 | 4354 | op == '{' ? (RExC_parse - parse_start) : 1); |
2af232bd | 4355 | |
830247a4 | 4356 | if (!SIZE_ONLY && RExC_extralen) |
c277df42 | 4357 | NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */ |
3dab1dad | 4358 | REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING)); |
c277df42 | 4359 | if (SIZE_ONLY) |
830247a4 IZ |
4360 | RExC_whilem_seen++, RExC_extralen += 3; |
4361 | RExC_naughty += 4 + RExC_naughty; /* compound interest */ | |
a0d0e21e | 4362 | } |
c277df42 | 4363 | ret->flags = 0; |
a0d0e21e LW |
4364 | |
4365 | if (min > 0) | |
821b33a5 IZ |
4366 | *flagp = WORST; |
4367 | if (max > 0) | |
4368 | *flagp |= HASWIDTH; | |
a0d0e21e | 4369 | if (max && max < min) |
8615cb43 | 4370 | vFAIL("Can't do {n,m} with n > m"); |
c277df42 | 4371 | if (!SIZE_ONLY) { |
eb160463 GS |
4372 | ARG1_SET(ret, (U16)min); |
4373 | ARG2_SET(ret, (U16)max); | |
a687059c | 4374 | } |
a687059c | 4375 | |
a0d0e21e | 4376 | goto nest_check; |
a687059c | 4377 | } |
a0d0e21e | 4378 | } |
a687059c | 4379 | |
a0d0e21e LW |
4380 | if (!ISMULT1(op)) { |
4381 | *flagp = flags; | |
a687059c | 4382 | return(ret); |
a0d0e21e | 4383 | } |
bb20fd44 | 4384 | |
c277df42 | 4385 | #if 0 /* Now runtime fix should be reliable. */ |
b45f050a JF |
4386 | |
4387 | /* if this is reinstated, don't forget to put this back into perldiag: | |
4388 | ||
4389 | =item Regexp *+ operand could be empty at {#} in regex m/%s/ | |
4390 | ||
4391 | (F) The part of the regexp subject to either the * or + quantifier | |
4392 | could match an empty string. The {#} shows in the regular | |
4393 | expression about where the problem was discovered. | |
4394 | ||
4395 | */ | |
4396 | ||
bb20fd44 | 4397 | if (!(flags&HASWIDTH) && op != '?') |
b45f050a | 4398 | vFAIL("Regexp *+ operand could be empty"); |
b81d288d | 4399 | #endif |
bb20fd44 | 4400 | |
fac92740 | 4401 | parse_start = RExC_parse; |
830247a4 | 4402 | nextchar(pRExC_state); |
a0d0e21e | 4403 | |
821b33a5 | 4404 | *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH); |
a0d0e21e LW |
4405 | |
4406 | if (op == '*' && (flags&SIMPLE)) { | |
830247a4 | 4407 | reginsert(pRExC_state, STAR, ret); |
c277df42 | 4408 | ret->flags = 0; |
830247a4 | 4409 | RExC_naughty += 4; |
a0d0e21e LW |
4410 | } |
4411 | else if (op == '*') { | |
4412 | min = 0; | |
4413 | goto do_curly; | |
a0ed51b3 LW |
4414 | } |
4415 | else if (op == '+' && (flags&SIMPLE)) { | |
830247a4 | 4416 | reginsert(pRExC_state, PLUS, ret); |
c277df42 | 4417 | ret->flags = 0; |
830247a4 | 4418 | RExC_naughty += 3; |
a0d0e21e LW |
4419 | } |
4420 | else if (op == '+') { | |
4421 | min = 1; | |
4422 | goto do_curly; | |
a0ed51b3 LW |
4423 | } |
4424 | else if (op == '?') { | |
a0d0e21e LW |
4425 | min = 0; max = 1; |
4426 | goto do_curly; | |
4427 | } | |
4428 | nest_check: | |
041457d9 | 4429 | if (!SIZE_ONLY && !(flags&HASWIDTH) && max > REG_INFTY/3 && ckWARN(WARN_REGEXP)) { |
830247a4 | 4430 | vWARN3(RExC_parse, |
b45f050a | 4431 | "%.*s matches null string many times", |
afd78fd5 | 4432 | (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0), |
b45f050a | 4433 | origparse); |
a0d0e21e LW |
4434 | } |
4435 | ||
830247a4 IZ |
4436 | if (*RExC_parse == '?') { |
4437 | nextchar(pRExC_state); | |
4438 | reginsert(pRExC_state, MINMOD, ret); | |
3dab1dad | 4439 | REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE); |
a0d0e21e | 4440 | } |
830247a4 IZ |
4441 | if (ISMULT2(RExC_parse)) { |
4442 | RExC_parse++; | |
b45f050a JF |
4443 | vFAIL("Nested quantifiers"); |
4444 | } | |
a0d0e21e LW |
4445 | |
4446 | return(ret); | |
a687059c LW |
4447 | } |
4448 | ||
4449 | /* | |
4450 | - regatom - the lowest level | |
4451 | * | |
4452 | * Optimization: gobbles an entire sequence of ordinary characters so that | |
4453 | * it can turn them into a single node, which is smaller to store and | |
4454 | * faster to run. Backslashed characters are exceptions, each becoming a | |
4455 | * separate node; the code is simpler that way and it's not worth fixing. | |
4456 | * | |
7f6f358c YO |
4457 | * [Yes, it is worth fixing, some scripts can run twice the speed.] |
4458 | * [It looks like its ok, as in S_study_chunk we merge adjacent EXACT nodes] | |
4459 | */ | |
76e3520e | 4460 | STATIC regnode * |
3dab1dad | 4461 | S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth) |
a687059c | 4462 | { |
97aff369 | 4463 | dVAR; |
cbbf8932 | 4464 | register regnode *ret = NULL; |
a0d0e21e | 4465 | I32 flags; |
45948336 | 4466 | char *parse_start = RExC_parse; |
3dab1dad YO |
4467 | GET_RE_DEBUG_FLAGS_DECL; |
4468 | DEBUG_PARSE("atom"); | |
a0d0e21e LW |
4469 | *flagp = WORST; /* Tentatively. */ |
4470 | ||
4471 | tryagain: | |
830247a4 | 4472 | switch (*RExC_parse) { |
a0d0e21e | 4473 | case '^': |
830247a4 IZ |
4474 | RExC_seen_zerolen++; |
4475 | nextchar(pRExC_state); | |
e2509266 | 4476 | if (RExC_flags & PMf_MULTILINE) |
830247a4 | 4477 | ret = reg_node(pRExC_state, MBOL); |
e2509266 | 4478 | else if (RExC_flags & PMf_SINGLELINE) |
830247a4 | 4479 | ret = reg_node(pRExC_state, SBOL); |
a0d0e21e | 4480 | else |
830247a4 | 4481 | ret = reg_node(pRExC_state, BOL); |
fac92740 | 4482 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
4483 | break; |
4484 | case '$': | |
830247a4 | 4485 | nextchar(pRExC_state); |
b81d288d | 4486 | if (*RExC_parse) |
830247a4 | 4487 | RExC_seen_zerolen++; |
e2509266 | 4488 | if (RExC_flags & PMf_MULTILINE) |
830247a4 | 4489 | ret = reg_node(pRExC_state, MEOL); |
e2509266 | 4490 | else if (RExC_flags & PMf_SINGLELINE) |
830247a4 | 4491 | ret = reg_node(pRExC_state, SEOL); |
a0d0e21e | 4492 | else |
830247a4 | 4493 | ret = reg_node(pRExC_state, EOL); |
fac92740 | 4494 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
4495 | break; |
4496 | case '.': | |
830247a4 | 4497 | nextchar(pRExC_state); |
e2509266 | 4498 | if (RExC_flags & PMf_SINGLELINE) |
ffc61ed2 JH |
4499 | ret = reg_node(pRExC_state, SANY); |
4500 | else | |
4501 | ret = reg_node(pRExC_state, REG_ANY); | |
4502 | *flagp |= HASWIDTH|SIMPLE; | |
830247a4 | 4503 | RExC_naughty++; |
fac92740 | 4504 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
4505 | break; |
4506 | case '[': | |
b45f050a | 4507 | { |
3dab1dad YO |
4508 | char * const oregcomp_parse = ++RExC_parse; |
4509 | ret = regclass(pRExC_state,depth+1); | |
830247a4 IZ |
4510 | if (*RExC_parse != ']') { |
4511 | RExC_parse = oregcomp_parse; | |
b45f050a JF |
4512 | vFAIL("Unmatched ["); |
4513 | } | |
830247a4 | 4514 | nextchar(pRExC_state); |
a0d0e21e | 4515 | *flagp |= HASWIDTH|SIMPLE; |
fac92740 | 4516 | Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */ |
a0d0e21e | 4517 | break; |
b45f050a | 4518 | } |
a0d0e21e | 4519 | case '(': |
830247a4 | 4520 | nextchar(pRExC_state); |
3dab1dad | 4521 | ret = reg(pRExC_state, 1, &flags,depth+1); |
a0d0e21e | 4522 | if (ret == NULL) { |
bf93d4cc | 4523 | if (flags & TRYAGAIN) { |
830247a4 | 4524 | if (RExC_parse == RExC_end) { |
bf93d4cc GS |
4525 | /* Make parent create an empty node if needed. */ |
4526 | *flagp |= TRYAGAIN; | |
4527 | return(NULL); | |
4528 | } | |
a0d0e21e | 4529 | goto tryagain; |
bf93d4cc | 4530 | } |
a0d0e21e LW |
4531 | return(NULL); |
4532 | } | |
c277df42 | 4533 | *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE); |
a0d0e21e LW |
4534 | break; |
4535 | case '|': | |
4536 | case ')': | |
4537 | if (flags & TRYAGAIN) { | |
4538 | *flagp |= TRYAGAIN; | |
4539 | return NULL; | |
4540 | } | |
b45f050a | 4541 | vFAIL("Internal urp"); |
a0d0e21e LW |
4542 | /* Supposed to be caught earlier. */ |
4543 | break; | |
85afd4ae | 4544 | case '{': |
830247a4 IZ |
4545 | if (!regcurly(RExC_parse)) { |
4546 | RExC_parse++; | |
85afd4ae CS |
4547 | goto defchar; |
4548 | } | |
4549 | /* FALL THROUGH */ | |
a0d0e21e LW |
4550 | case '?': |
4551 | case '+': | |
4552 | case '*': | |
830247a4 | 4553 | RExC_parse++; |
b45f050a | 4554 | vFAIL("Quantifier follows nothing"); |
a0d0e21e LW |
4555 | break; |
4556 | case '\\': | |
830247a4 | 4557 | switch (*++RExC_parse) { |
a0d0e21e | 4558 | case 'A': |
830247a4 IZ |
4559 | RExC_seen_zerolen++; |
4560 | ret = reg_node(pRExC_state, SBOL); | |
a0d0e21e | 4561 | *flagp |= SIMPLE; |
830247a4 | 4562 | nextchar(pRExC_state); |
fac92740 | 4563 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
4564 | break; |
4565 | case 'G': | |
830247a4 IZ |
4566 | ret = reg_node(pRExC_state, GPOS); |
4567 | RExC_seen |= REG_SEEN_GPOS; | |
a0d0e21e | 4568 | *flagp |= SIMPLE; |
830247a4 | 4569 | nextchar(pRExC_state); |
fac92740 | 4570 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
4571 | break; |
4572 | case 'Z': | |
830247a4 | 4573 | ret = reg_node(pRExC_state, SEOL); |
a0d0e21e | 4574 | *flagp |= SIMPLE; |
a1917ab9 | 4575 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
830247a4 | 4576 | nextchar(pRExC_state); |
a0d0e21e | 4577 | break; |
b85d18e9 | 4578 | case 'z': |
830247a4 | 4579 | ret = reg_node(pRExC_state, EOS); |
b85d18e9 | 4580 | *flagp |= SIMPLE; |
830247a4 IZ |
4581 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
4582 | nextchar(pRExC_state); | |
fac92740 | 4583 | Set_Node_Length(ret, 2); /* MJD */ |
b85d18e9 | 4584 | break; |
4a2d328f | 4585 | case 'C': |
f33976b4 DB |
4586 | ret = reg_node(pRExC_state, CANY); |
4587 | RExC_seen |= REG_SEEN_CANY; | |
a0ed51b3 | 4588 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 4589 | nextchar(pRExC_state); |
fac92740 | 4590 | Set_Node_Length(ret, 2); /* MJD */ |
a0ed51b3 LW |
4591 | break; |
4592 | case 'X': | |
830247a4 | 4593 | ret = reg_node(pRExC_state, CLUMP); |
a0ed51b3 | 4594 | *flagp |= HASWIDTH; |
830247a4 | 4595 | nextchar(pRExC_state); |
fac92740 | 4596 | Set_Node_Length(ret, 2); /* MJD */ |
a0ed51b3 | 4597 | break; |
a0d0e21e | 4598 | case 'w': |
eb160463 | 4599 | ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM)); |
a0d0e21e | 4600 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 4601 | nextchar(pRExC_state); |
fac92740 | 4602 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
4603 | break; |
4604 | case 'W': | |
eb160463 | 4605 | ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM)); |
a0d0e21e | 4606 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 4607 | nextchar(pRExC_state); |
fac92740 | 4608 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
4609 | break; |
4610 | case 'b': | |
830247a4 IZ |
4611 | RExC_seen_zerolen++; |
4612 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
eb160463 | 4613 | ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND)); |
a0d0e21e | 4614 | *flagp |= SIMPLE; |
830247a4 | 4615 | nextchar(pRExC_state); |
fac92740 | 4616 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
4617 | break; |
4618 | case 'B': | |
830247a4 IZ |
4619 | RExC_seen_zerolen++; |
4620 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
eb160463 | 4621 | ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND)); |
a0d0e21e | 4622 | *flagp |= SIMPLE; |
830247a4 | 4623 | nextchar(pRExC_state); |
fac92740 | 4624 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
4625 | break; |
4626 | case 's': | |
eb160463 | 4627 | ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE)); |
a0d0e21e | 4628 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 4629 | nextchar(pRExC_state); |
fac92740 | 4630 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
4631 | break; |
4632 | case 'S': | |
eb160463 | 4633 | ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE)); |
a0d0e21e | 4634 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 4635 | nextchar(pRExC_state); |
fac92740 | 4636 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
4637 | break; |
4638 | case 'd': | |
ffc61ed2 | 4639 | ret = reg_node(pRExC_state, DIGIT); |
a0d0e21e | 4640 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 4641 | nextchar(pRExC_state); |
fac92740 | 4642 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
4643 | break; |
4644 | case 'D': | |
ffc61ed2 | 4645 | ret = reg_node(pRExC_state, NDIGIT); |
a0d0e21e | 4646 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 4647 | nextchar(pRExC_state); |
fac92740 | 4648 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e | 4649 | break; |
a14b48bc LW |
4650 | case 'p': |
4651 | case 'P': | |
3568d838 | 4652 | { |
3dab1dad | 4653 | char* const oldregxend = RExC_end; |
ccb2c380 | 4654 | char* parse_start = RExC_parse - 2; |
a14b48bc | 4655 | |
830247a4 | 4656 | if (RExC_parse[1] == '{') { |
3568d838 | 4657 | /* a lovely hack--pretend we saw [\pX] instead */ |
830247a4 IZ |
4658 | RExC_end = strchr(RExC_parse, '}'); |
4659 | if (!RExC_end) { | |
3dab1dad | 4660 | const U8 c = (U8)*RExC_parse; |
830247a4 IZ |
4661 | RExC_parse += 2; |
4662 | RExC_end = oldregxend; | |
0da60cf5 | 4663 | vFAIL2("Missing right brace on \\%c{}", c); |
b45f050a | 4664 | } |
830247a4 | 4665 | RExC_end++; |
a14b48bc | 4666 | } |
af6f566e | 4667 | else { |
830247a4 | 4668 | RExC_end = RExC_parse + 2; |
af6f566e HS |
4669 | if (RExC_end > oldregxend) |
4670 | RExC_end = oldregxend; | |
4671 | } | |
830247a4 | 4672 | RExC_parse--; |
a14b48bc | 4673 | |
3dab1dad | 4674 | ret = regclass(pRExC_state,depth+1); |
a14b48bc | 4675 | |
830247a4 IZ |
4676 | RExC_end = oldregxend; |
4677 | RExC_parse--; | |
ccb2c380 MP |
4678 | |
4679 | Set_Node_Offset(ret, parse_start + 2); | |
4680 | Set_Node_Cur_Length(ret); | |
830247a4 | 4681 | nextchar(pRExC_state); |
a14b48bc LW |
4682 | *flagp |= HASWIDTH|SIMPLE; |
4683 | } | |
4684 | break; | |
a0d0e21e LW |
4685 | case 'n': |
4686 | case 'r': | |
4687 | case 't': | |
4688 | case 'f': | |
4689 | case 'e': | |
4690 | case 'a': | |
4691 | case 'x': | |
4692 | case 'c': | |
4693 | case '0': | |
4694 | goto defchar; | |
4695 | case '1': case '2': case '3': case '4': | |
4696 | case '5': case '6': case '7': case '8': case '9': | |
4697 | { | |
1df70142 | 4698 | const I32 num = atoi(RExC_parse); |
a0d0e21e | 4699 | |
830247a4 | 4700 | if (num > 9 && num >= RExC_npar) |
a0d0e21e LW |
4701 | goto defchar; |
4702 | else { | |
3dab1dad | 4703 | char * const parse_start = RExC_parse - 1; /* MJD */ |
830247a4 IZ |
4704 | while (isDIGIT(*RExC_parse)) |
4705 | RExC_parse++; | |
b45f050a | 4706 | |
eb160463 | 4707 | if (!SIZE_ONLY && num > (I32)RExC_rx->nparens) |
9baa0206 | 4708 | vFAIL("Reference to nonexistent group"); |
830247a4 | 4709 | RExC_sawback = 1; |
eb160463 GS |
4710 | ret = reganode(pRExC_state, |
4711 | (U8)(FOLD ? (LOC ? REFFL : REFF) : REF), | |
4712 | num); | |
a0d0e21e | 4713 | *flagp |= HASWIDTH; |
2af232bd | 4714 | |
fac92740 | 4715 | /* override incorrect value set in reganode MJD */ |
2af232bd | 4716 | Set_Node_Offset(ret, parse_start+1); |
fac92740 | 4717 | Set_Node_Cur_Length(ret); /* MJD */ |
830247a4 IZ |
4718 | RExC_parse--; |
4719 | nextchar(pRExC_state); | |
a0d0e21e LW |
4720 | } |
4721 | } | |
4722 | break; | |
4723 | case '\0': | |
830247a4 | 4724 | if (RExC_parse >= RExC_end) |
b45f050a | 4725 | FAIL("Trailing \\"); |
a0d0e21e LW |
4726 | /* FALL THROUGH */ |
4727 | default: | |
a0288114 | 4728 | /* Do not generate "unrecognized" warnings here, we fall |
c9f97d15 | 4729 | back into the quick-grab loop below */ |
45948336 | 4730 | parse_start--; |
a0d0e21e LW |
4731 | goto defchar; |
4732 | } | |
4733 | break; | |
4633a7c4 LW |
4734 | |
4735 | case '#': | |
e2509266 | 4736 | if (RExC_flags & PMf_EXTENDED) { |
3dab1dad YO |
4737 | while (RExC_parse < RExC_end && *RExC_parse != '\n') |
4738 | RExC_parse++; | |
830247a4 | 4739 | if (RExC_parse < RExC_end) |
4633a7c4 LW |
4740 | goto tryagain; |
4741 | } | |
4742 | /* FALL THROUGH */ | |
4743 | ||
a0d0e21e | 4744 | default: { |
ba210ebe | 4745 | register STRLEN len; |
58ae7d3f | 4746 | register UV ender; |
a0d0e21e | 4747 | register char *p; |
3dab1dad | 4748 | char *s; |
80aecb99 | 4749 | STRLEN foldlen; |
89ebb4a3 | 4750 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf; |
f06dbbb7 JH |
4751 | |
4752 | parse_start = RExC_parse - 1; | |
a0d0e21e | 4753 | |
830247a4 | 4754 | RExC_parse++; |
a0d0e21e LW |
4755 | |
4756 | defchar: | |
58ae7d3f | 4757 | ender = 0; |
eb160463 GS |
4758 | ret = reg_node(pRExC_state, |
4759 | (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT)); | |
cd439c50 | 4760 | s = STRING(ret); |
830247a4 IZ |
4761 | for (len = 0, p = RExC_parse - 1; |
4762 | len < 127 && p < RExC_end; | |
a0d0e21e LW |
4763 | len++) |
4764 | { | |
3dab1dad | 4765 | char * const oldp = p; |
5b5a24f7 | 4766 | |
e2509266 | 4767 | if (RExC_flags & PMf_EXTENDED) |
830247a4 | 4768 | p = regwhite(p, RExC_end); |
a0d0e21e LW |
4769 | switch (*p) { |
4770 | case '^': | |
4771 | case '$': | |
4772 | case '.': | |
4773 | case '[': | |
4774 | case '(': | |
4775 | case ')': | |
4776 | case '|': | |
4777 | goto loopdone; | |
4778 | case '\\': | |
4779 | switch (*++p) { | |
4780 | case 'A': | |
1ed8eac0 JF |
4781 | case 'C': |
4782 | case 'X': | |
a0d0e21e LW |
4783 | case 'G': |
4784 | case 'Z': | |
b85d18e9 | 4785 | case 'z': |
a0d0e21e LW |
4786 | case 'w': |
4787 | case 'W': | |
4788 | case 'b': | |
4789 | case 'B': | |
4790 | case 's': | |
4791 | case 'S': | |
4792 | case 'd': | |
4793 | case 'D': | |
a14b48bc LW |
4794 | case 'p': |
4795 | case 'P': | |
a0d0e21e LW |
4796 | --p; |
4797 | goto loopdone; | |
4798 | case 'n': | |
4799 | ender = '\n'; | |
4800 | p++; | |
a687059c | 4801 | break; |
a0d0e21e LW |
4802 | case 'r': |
4803 | ender = '\r'; | |
4804 | p++; | |
a687059c | 4805 | break; |
a0d0e21e LW |
4806 | case 't': |
4807 | ender = '\t'; | |
4808 | p++; | |
a687059c | 4809 | break; |
a0d0e21e LW |
4810 | case 'f': |
4811 | ender = '\f'; | |
4812 | p++; | |
a687059c | 4813 | break; |
a0d0e21e | 4814 | case 'e': |
c7f1f016 | 4815 | ender = ASCII_TO_NATIVE('\033'); |
a0d0e21e | 4816 | p++; |
a687059c | 4817 | break; |
a0d0e21e | 4818 | case 'a': |
c7f1f016 | 4819 | ender = ASCII_TO_NATIVE('\007'); |
a0d0e21e | 4820 | p++; |
a687059c | 4821 | break; |
a0d0e21e | 4822 | case 'x': |
a0ed51b3 | 4823 | if (*++p == '{') { |
1df70142 | 4824 | char* const e = strchr(p, '}'); |
b81d288d | 4825 | |
b45f050a | 4826 | if (!e) { |
830247a4 | 4827 | RExC_parse = p + 1; |
b45f050a JF |
4828 | vFAIL("Missing right brace on \\x{}"); |
4829 | } | |
de5f0749 | 4830 | else { |
a4c04bdc NC |
4831 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
4832 | | PERL_SCAN_DISALLOW_PREFIX; | |
1df70142 | 4833 | STRLEN numlen = e - p - 1; |
53305cf1 | 4834 | ender = grok_hex(p + 1, &numlen, &flags, NULL); |
aaa80028 JH |
4835 | if (ender > 0xff) |
4836 | RExC_utf8 = 1; | |
a0ed51b3 LW |
4837 | p = e + 1; |
4838 | } | |
a0ed51b3 LW |
4839 | } |
4840 | else { | |
a4c04bdc | 4841 | I32 flags = PERL_SCAN_DISALLOW_PREFIX; |
1df70142 | 4842 | STRLEN numlen = 2; |
53305cf1 | 4843 | ender = grok_hex(p, &numlen, &flags, NULL); |
a0ed51b3 LW |
4844 | p += numlen; |
4845 | } | |
a687059c | 4846 | break; |
a0d0e21e LW |
4847 | case 'c': |
4848 | p++; | |
bbce6d69 | 4849 | ender = UCHARAT(p++); |
4850 | ender = toCTRL(ender); | |
a687059c | 4851 | break; |
a0d0e21e LW |
4852 | case '0': case '1': case '2': case '3':case '4': |
4853 | case '5': case '6': case '7': case '8':case '9': | |
4854 | if (*p == '0' || | |
830247a4 | 4855 | (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) { |
53305cf1 | 4856 | I32 flags = 0; |
1df70142 | 4857 | STRLEN numlen = 3; |
53305cf1 | 4858 | ender = grok_oct(p, &numlen, &flags, NULL); |
a0d0e21e LW |
4859 | p += numlen; |
4860 | } | |
4861 | else { | |
4862 | --p; | |
4863 | goto loopdone; | |
a687059c LW |
4864 | } |
4865 | break; | |
a0d0e21e | 4866 | case '\0': |
830247a4 | 4867 | if (p >= RExC_end) |
b45f050a | 4868 | FAIL("Trailing \\"); |
a687059c | 4869 | /* FALL THROUGH */ |
a0d0e21e | 4870 | default: |
041457d9 | 4871 | if (!SIZE_ONLY&& isALPHA(*p) && ckWARN(WARN_REGEXP)) |
4193bef7 | 4872 | vWARN2(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p)); |
a0ed51b3 | 4873 | goto normal_default; |
a0d0e21e LW |
4874 | } |
4875 | break; | |
a687059c | 4876 | default: |
a0ed51b3 | 4877 | normal_default: |
fd400ab9 | 4878 | if (UTF8_IS_START(*p) && UTF) { |
1df70142 | 4879 | STRLEN numlen; |
5e12f4fb | 4880 | ender = utf8n_to_uvchr((U8*)p, RExC_end - p, |
9f7f3913 | 4881 | &numlen, UTF8_ALLOW_DEFAULT); |
a0ed51b3 LW |
4882 | p += numlen; |
4883 | } | |
4884 | else | |
4885 | ender = *p++; | |
a0d0e21e | 4886 | break; |
a687059c | 4887 | } |
e2509266 | 4888 | if (RExC_flags & PMf_EXTENDED) |
830247a4 | 4889 | p = regwhite(p, RExC_end); |
60a8b682 JH |
4890 | if (UTF && FOLD) { |
4891 | /* Prime the casefolded buffer. */ | |
ac7e0132 | 4892 | ender = toFOLD_uni(ender, tmpbuf, &foldlen); |
60a8b682 | 4893 | } |
a0d0e21e LW |
4894 | if (ISMULT2(p)) { /* Back off on ?+*. */ |
4895 | if (len) | |
4896 | p = oldp; | |
16ea2a2e | 4897 | else if (UTF) { |
80aecb99 | 4898 | if (FOLD) { |
60a8b682 | 4899 | /* Emit all the Unicode characters. */ |
1df70142 | 4900 | STRLEN numlen; |
80aecb99 JH |
4901 | for (foldbuf = tmpbuf; |
4902 | foldlen; | |
4903 | foldlen -= numlen) { | |
4904 | ender = utf8_to_uvchr(foldbuf, &numlen); | |
9dc45d57 | 4905 | if (numlen > 0) { |
71207a34 | 4906 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
0ebc6274 JH |
4907 | s += unilen; |
4908 | len += unilen; | |
4909 | /* In EBCDIC the numlen | |
4910 | * and unilen can differ. */ | |
9dc45d57 | 4911 | foldbuf += numlen; |
47654450 JH |
4912 | if (numlen >= foldlen) |
4913 | break; | |
9dc45d57 JH |
4914 | } |
4915 | else | |
4916 | break; /* "Can't happen." */ | |
80aecb99 JH |
4917 | } |
4918 | } | |
4919 | else { | |
71207a34 | 4920 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
9ede7db1 | 4921 | if (unilen > 0) { |
0ebc6274 JH |
4922 | s += unilen; |
4923 | len += unilen; | |
9dc45d57 | 4924 | } |
80aecb99 | 4925 | } |
a0ed51b3 | 4926 | } |
a0d0e21e LW |
4927 | else { |
4928 | len++; | |
eb160463 | 4929 | REGC((char)ender, s++); |
a0d0e21e LW |
4930 | } |
4931 | break; | |
a687059c | 4932 | } |
16ea2a2e | 4933 | if (UTF) { |
80aecb99 | 4934 | if (FOLD) { |
60a8b682 | 4935 | /* Emit all the Unicode characters. */ |
1df70142 | 4936 | STRLEN numlen; |
80aecb99 JH |
4937 | for (foldbuf = tmpbuf; |
4938 | foldlen; | |
4939 | foldlen -= numlen) { | |
4940 | ender = utf8_to_uvchr(foldbuf, &numlen); | |
9dc45d57 | 4941 | if (numlen > 0) { |
71207a34 | 4942 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
0ebc6274 JH |
4943 | len += unilen; |
4944 | s += unilen; | |
4945 | /* In EBCDIC the numlen | |
4946 | * and unilen can differ. */ | |
9dc45d57 | 4947 | foldbuf += numlen; |
47654450 JH |
4948 | if (numlen >= foldlen) |
4949 | break; | |
9dc45d57 JH |
4950 | } |
4951 | else | |
4952 | break; | |
80aecb99 JH |
4953 | } |
4954 | } | |
4955 | else { | |
71207a34 | 4956 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
9ede7db1 | 4957 | if (unilen > 0) { |
0ebc6274 JH |
4958 | s += unilen; |
4959 | len += unilen; | |
9dc45d57 | 4960 | } |
80aecb99 JH |
4961 | } |
4962 | len--; | |
a0ed51b3 LW |
4963 | } |
4964 | else | |
eb160463 | 4965 | REGC((char)ender, s++); |
a0d0e21e LW |
4966 | } |
4967 | loopdone: | |
830247a4 | 4968 | RExC_parse = p - 1; |
fac92740 | 4969 | Set_Node_Cur_Length(ret); /* MJD */ |
830247a4 | 4970 | nextchar(pRExC_state); |
793db0cb JH |
4971 | { |
4972 | /* len is STRLEN which is unsigned, need to copy to signed */ | |
4973 | IV iv = len; | |
4974 | if (iv < 0) | |
4975 | vFAIL("Internal disaster"); | |
4976 | } | |
a0d0e21e LW |
4977 | if (len > 0) |
4978 | *flagp |= HASWIDTH; | |
090f7165 | 4979 | if (len == 1 && UNI_IS_INVARIANT(ender)) |
a0d0e21e | 4980 | *flagp |= SIMPLE; |
3dab1dad | 4981 | |
cd439c50 | 4982 | if (SIZE_ONLY) |
830247a4 | 4983 | RExC_size += STR_SZ(len); |
3dab1dad YO |
4984 | else { |
4985 | STR_LEN(ret) = len; | |
830247a4 | 4986 | RExC_emit += STR_SZ(len); |
07be1b83 | 4987 | } |
3dab1dad | 4988 | } |
a0d0e21e LW |
4989 | break; |
4990 | } | |
a687059c | 4991 | |
60a8b682 JH |
4992 | /* If the encoding pragma is in effect recode the text of |
4993 | * any EXACT-kind nodes. */ | |
3dab1dad YO |
4994 | if (PL_encoding && PL_regkind[OP(ret)] == EXACT) { |
4995 | const STRLEN oldlen = STR_LEN(ret); | |
4996 | SV * const sv = sv_2mortal(newSVpvn(STRING(ret), oldlen)); | |
d0063567 DK |
4997 | |
4998 | if (RExC_utf8) | |
4999 | SvUTF8_on(sv); | |
5000 | if (sv_utf8_downgrade(sv, TRUE)) { | |
1df70142 AL |
5001 | const char * const s = sv_recode_to_utf8(sv, PL_encoding); |
5002 | const STRLEN newlen = SvCUR(sv); | |
d0063567 DK |
5003 | |
5004 | if (SvUTF8(sv)) | |
5005 | RExC_utf8 = 1; | |
5006 | if (!SIZE_ONLY) { | |
a3621e74 YO |
5007 | GET_RE_DEBUG_FLAGS_DECL; |
5008 | DEBUG_COMPILE_r(PerlIO_printf(Perl_debug_log, "recode %*s to %*s\n", | |
d0063567 DK |
5009 | (int)oldlen, STRING(ret), |
5010 | (int)newlen, s)); | |
5011 | Copy(s, STRING(ret), newlen, char); | |
5012 | STR_LEN(ret) += newlen - oldlen; | |
5013 | RExC_emit += STR_SZ(newlen) - STR_SZ(oldlen); | |
5014 | } else | |
5015 | RExC_size += STR_SZ(newlen) - STR_SZ(oldlen); | |
5016 | } | |
a72c7584 JH |
5017 | } |
5018 | ||
a0d0e21e | 5019 | return(ret); |
a687059c LW |
5020 | } |
5021 | ||
873ef191 | 5022 | STATIC char * |
5f66b61c | 5023 | S_regwhite(char *p, const char *e) |
5b5a24f7 CS |
5024 | { |
5025 | while (p < e) { | |
5026 | if (isSPACE(*p)) | |
5027 | ++p; | |
5028 | else if (*p == '#') { | |
5029 | do { | |
5030 | p++; | |
5031 | } while (p < e && *p != '\n'); | |
5032 | } | |
5033 | else | |
5034 | break; | |
5035 | } | |
5036 | return p; | |
5037 | } | |
5038 | ||
b8c5462f JH |
5039 | /* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]]. |
5040 | Character classes ([:foo:]) can also be negated ([:^foo:]). | |
5041 | Returns a named class id (ANYOF_XXX) if successful, -1 otherwise. | |
5042 | Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed, | |
beeb77fc | 5043 | but trigger failures because they are currently unimplemented. */ |
9a86a77b JH |
5044 | |
5045 | #define POSIXCC_DONE(c) ((c) == ':') | |
5046 | #define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.') | |
5047 | #define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c)) | |
5048 | ||
b8c5462f | 5049 | STATIC I32 |
830247a4 | 5050 | S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value) |
620e46c5 | 5051 | { |
97aff369 | 5052 | dVAR; |
936ed897 | 5053 | I32 namedclass = OOB_NAMEDCLASS; |
620e46c5 | 5054 | |
830247a4 | 5055 | if (value == '[' && RExC_parse + 1 < RExC_end && |
620e46c5 | 5056 | /* I smell either [: or [= or [. -- POSIX has been here, right? */ |
9a86a77b | 5057 | POSIXCC(UCHARAT(RExC_parse))) { |
1df70142 | 5058 | const char c = UCHARAT(RExC_parse); |
097eb12c | 5059 | char* const s = RExC_parse++; |
b81d288d | 5060 | |
9a86a77b | 5061 | while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c) |
830247a4 IZ |
5062 | RExC_parse++; |
5063 | if (RExC_parse == RExC_end) | |
620e46c5 | 5064 | /* Grandfather lone [:, [=, [. */ |
830247a4 | 5065 | RExC_parse = s; |
620e46c5 | 5066 | else { |
3dab1dad | 5067 | const char* const t = RExC_parse++; /* skip over the c */ |
80916619 NC |
5068 | assert(*t == c); |
5069 | ||
9a86a77b | 5070 | if (UCHARAT(RExC_parse) == ']') { |
3dab1dad | 5071 | const char *posixcc = s + 1; |
830247a4 | 5072 | RExC_parse++; /* skip over the ending ] */ |
3dab1dad | 5073 | |
b8c5462f | 5074 | if (*s == ':') { |
1df70142 AL |
5075 | const I32 complement = *posixcc == '^' ? *posixcc++ : 0; |
5076 | const I32 skip = t - posixcc; | |
80916619 NC |
5077 | |
5078 | /* Initially switch on the length of the name. */ | |
5079 | switch (skip) { | |
5080 | case 4: | |
3dab1dad YO |
5081 | if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */ |
5082 | namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM; | |
cc4319de | 5083 | break; |
80916619 NC |
5084 | case 5: |
5085 | /* Names all of length 5. */ | |
5086 | /* alnum alpha ascii blank cntrl digit graph lower | |
5087 | print punct space upper */ | |
5088 | /* Offset 4 gives the best switch position. */ | |
5089 | switch (posixcc[4]) { | |
5090 | case 'a': | |
3dab1dad YO |
5091 | if (memEQ(posixcc, "alph", 4)) /* alpha */ |
5092 | namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA; | |
80916619 NC |
5093 | break; |
5094 | case 'e': | |
3dab1dad YO |
5095 | if (memEQ(posixcc, "spac", 4)) /* space */ |
5096 | namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC; | |
80916619 NC |
5097 | break; |
5098 | case 'h': | |
3dab1dad YO |
5099 | if (memEQ(posixcc, "grap", 4)) /* graph */ |
5100 | namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH; | |
80916619 NC |
5101 | break; |
5102 | case 'i': | |
3dab1dad YO |
5103 | if (memEQ(posixcc, "asci", 4)) /* ascii */ |
5104 | namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII; | |
80916619 NC |
5105 | break; |
5106 | case 'k': | |
3dab1dad YO |
5107 | if (memEQ(posixcc, "blan", 4)) /* blank */ |
5108 | namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK; | |
80916619 NC |
5109 | break; |
5110 | case 'l': | |
3dab1dad YO |
5111 | if (memEQ(posixcc, "cntr", 4)) /* cntrl */ |
5112 | namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL; | |
80916619 NC |
5113 | break; |
5114 | case 'm': | |
3dab1dad YO |
5115 | if (memEQ(posixcc, "alnu", 4)) /* alnum */ |
5116 | namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC; | |
80916619 NC |
5117 | break; |
5118 | case 'r': | |
3dab1dad YO |
5119 | if (memEQ(posixcc, "lowe", 4)) /* lower */ |
5120 | namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER; | |
5121 | else if (memEQ(posixcc, "uppe", 4)) /* upper */ | |
5122 | namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER; | |
80916619 NC |
5123 | break; |
5124 | case 't': | |
3dab1dad YO |
5125 | if (memEQ(posixcc, "digi", 4)) /* digit */ |
5126 | namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT; | |
5127 | else if (memEQ(posixcc, "prin", 4)) /* print */ | |
5128 | namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT; | |
5129 | else if (memEQ(posixcc, "punc", 4)) /* punct */ | |
5130 | namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT; | |
80916619 | 5131 | break; |
b8c5462f JH |
5132 | } |
5133 | break; | |
80916619 | 5134 | case 6: |
3dab1dad YO |
5135 | if (memEQ(posixcc, "xdigit", 6)) |
5136 | namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT; | |
b8c5462f JH |
5137 | break; |
5138 | } | |
80916619 NC |
5139 | |
5140 | if (namedclass == OOB_NAMEDCLASS) | |
b45f050a JF |
5141 | Simple_vFAIL3("POSIX class [:%.*s:] unknown", |
5142 | t - s - 1, s + 1); | |
80916619 NC |
5143 | assert (posixcc[skip] == ':'); |
5144 | assert (posixcc[skip+1] == ']'); | |
b45f050a | 5145 | } else if (!SIZE_ONLY) { |
b8c5462f | 5146 | /* [[=foo=]] and [[.foo.]] are still future. */ |
b45f050a | 5147 | |
830247a4 | 5148 | /* adjust RExC_parse so the warning shows after |
b45f050a | 5149 | the class closes */ |
9a86a77b | 5150 | while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']') |
830247a4 | 5151 | RExC_parse++; |
b45f050a JF |
5152 | Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
5153 | } | |
b8c5462f JH |
5154 | } else { |
5155 | /* Maternal grandfather: | |
5156 | * "[:" ending in ":" but not in ":]" */ | |
830247a4 | 5157 | RExC_parse = s; |
767d463e | 5158 | } |
620e46c5 JH |
5159 | } |
5160 | } | |
5161 | ||
b8c5462f JH |
5162 | return namedclass; |
5163 | } | |
5164 | ||
5165 | STATIC void | |
830247a4 | 5166 | S_checkposixcc(pTHX_ RExC_state_t *pRExC_state) |
b8c5462f | 5167 | { |
97aff369 | 5168 | dVAR; |
3dab1dad | 5169 | if (POSIXCC(UCHARAT(RExC_parse))) { |
1df70142 AL |
5170 | const char *s = RExC_parse; |
5171 | const char c = *s++; | |
b8c5462f | 5172 | |
3dab1dad | 5173 | while (isALNUM(*s)) |
b8c5462f JH |
5174 | s++; |
5175 | if (*s && c == *s && s[1] == ']') { | |
cd84f5b2 RGS |
5176 | if (ckWARN(WARN_REGEXP)) |
5177 | vWARN3(s+2, | |
5178 | "POSIX syntax [%c %c] belongs inside character classes", | |
5179 | c, c); | |
b45f050a JF |
5180 | |
5181 | /* [[=foo=]] and [[.foo.]] are still future. */ | |
9a86a77b | 5182 | if (POSIXCC_NOTYET(c)) { |
830247a4 | 5183 | /* adjust RExC_parse so the error shows after |
b45f050a | 5184 | the class closes */ |
9a86a77b | 5185 | while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']') |
3dab1dad | 5186 | NOOP; |
b45f050a JF |
5187 | Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
5188 | } | |
b8c5462f JH |
5189 | } |
5190 | } | |
620e46c5 JH |
5191 | } |
5192 | ||
7f6f358c YO |
5193 | |
5194 | /* | |
5195 | parse a class specification and produce either an ANYOF node that | |
5196 | matches the pattern. If the pattern matches a single char only and | |
5197 | that char is < 256 then we produce an EXACT node instead. | |
5198 | */ | |
76e3520e | 5199 | STATIC regnode * |
3dab1dad | 5200 | S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth) |
a687059c | 5201 | { |
97aff369 | 5202 | dVAR; |
07be1b83 | 5203 | register UV value; |
9a86a77b | 5204 | register UV nextvalue; |
3568d838 | 5205 | register IV prevvalue = OOB_UNICODE; |
ffc61ed2 | 5206 | register IV range = 0; |
c277df42 | 5207 | register regnode *ret; |
ba210ebe | 5208 | STRLEN numlen; |
ffc61ed2 | 5209 | IV namedclass; |
cbbf8932 | 5210 | char *rangebegin = NULL; |
936ed897 | 5211 | bool need_class = 0; |
c445ea15 | 5212 | SV *listsv = NULL; |
ffc61ed2 | 5213 | UV n; |
9e55ce06 | 5214 | bool optimize_invert = TRUE; |
cbbf8932 | 5215 | AV* unicode_alternate = NULL; |
1b2d223b JH |
5216 | #ifdef EBCDIC |
5217 | UV literal_endpoint = 0; | |
5218 | #endif | |
7f6f358c | 5219 | UV stored = 0; /* number of chars stored in the class */ |
ffc61ed2 | 5220 | |
3dab1dad | 5221 | regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in |
7f6f358c | 5222 | case we need to change the emitted regop to an EXACT. */ |
07be1b83 | 5223 | const char * orig_parse = RExC_parse; |
72f13be8 | 5224 | GET_RE_DEBUG_FLAGS_DECL; |
76e84362 SH |
5225 | #ifndef DEBUGGING |
5226 | PERL_UNUSED_ARG(depth); | |
5227 | #endif | |
72f13be8 | 5228 | |
3dab1dad | 5229 | DEBUG_PARSE("clas"); |
7f6f358c YO |
5230 | |
5231 | /* Assume we are going to generate an ANYOF node. */ | |
ffc61ed2 JH |
5232 | ret = reganode(pRExC_state, ANYOF, 0); |
5233 | ||
5234 | if (!SIZE_ONLY) | |
5235 | ANYOF_FLAGS(ret) = 0; | |
5236 | ||
9a86a77b | 5237 | if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */ |
ffc61ed2 JH |
5238 | RExC_naughty++; |
5239 | RExC_parse++; | |
5240 | if (!SIZE_ONLY) | |
5241 | ANYOF_FLAGS(ret) |= ANYOF_INVERT; | |
5242 | } | |
a0d0e21e | 5243 | |
73060fc4 | 5244 | if (SIZE_ONLY) { |
830247a4 | 5245 | RExC_size += ANYOF_SKIP; |
73060fc4 JH |
5246 | listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */ |
5247 | } | |
936ed897 | 5248 | else { |
830247a4 | 5249 | RExC_emit += ANYOF_SKIP; |
936ed897 IZ |
5250 | if (FOLD) |
5251 | ANYOF_FLAGS(ret) |= ANYOF_FOLD; | |
5252 | if (LOC) | |
5253 | ANYOF_FLAGS(ret) |= ANYOF_LOCALE; | |
ffc61ed2 | 5254 | ANYOF_BITMAP_ZERO(ret); |
396482e1 | 5255 | listsv = newSVpvs("# comment\n"); |
a0d0e21e | 5256 | } |
b8c5462f | 5257 | |
9a86a77b JH |
5258 | nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0; |
5259 | ||
b938889d | 5260 | if (!SIZE_ONLY && POSIXCC(nextvalue)) |
830247a4 | 5261 | checkposixcc(pRExC_state); |
b8c5462f | 5262 | |
f064b6ad HS |
5263 | /* allow 1st char to be ] (allowing it to be - is dealt with later) */ |
5264 | if (UCHARAT(RExC_parse) == ']') | |
5265 | goto charclassloop; | |
ffc61ed2 | 5266 | |
9a86a77b | 5267 | while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') { |
ffc61ed2 JH |
5268 | |
5269 | charclassloop: | |
5270 | ||
5271 | namedclass = OOB_NAMEDCLASS; /* initialize as illegal */ | |
5272 | ||
73b437c8 | 5273 | if (!range) |
830247a4 | 5274 | rangebegin = RExC_parse; |
ffc61ed2 | 5275 | if (UTF) { |
5e12f4fb | 5276 | value = utf8n_to_uvchr((U8*)RExC_parse, |
3568d838 | 5277 | RExC_end - RExC_parse, |
9f7f3913 | 5278 | &numlen, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
5279 | RExC_parse += numlen; |
5280 | } | |
5281 | else | |
5282 | value = UCHARAT(RExC_parse++); | |
7f6f358c | 5283 | |
9a86a77b JH |
5284 | nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0; |
5285 | if (value == '[' && POSIXCC(nextvalue)) | |
830247a4 | 5286 | namedclass = regpposixcc(pRExC_state, value); |
620e46c5 | 5287 | else if (value == '\\') { |
ffc61ed2 | 5288 | if (UTF) { |
5e12f4fb | 5289 | value = utf8n_to_uvchr((U8*)RExC_parse, |
ffc61ed2 | 5290 | RExC_end - RExC_parse, |
9f7f3913 | 5291 | &numlen, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
5292 | RExC_parse += numlen; |
5293 | } | |
5294 | else | |
5295 | value = UCHARAT(RExC_parse++); | |
470c3474 | 5296 | /* Some compilers cannot handle switching on 64-bit integer |
ffc61ed2 | 5297 | * values, therefore value cannot be an UV. Yes, this will |
e2962f66 JH |
5298 | * be a problem later if we want switch on Unicode. |
5299 | * A similar issue a little bit later when switching on | |
5300 | * namedclass. --jhi */ | |
ffc61ed2 | 5301 | switch ((I32)value) { |
b8c5462f JH |
5302 | case 'w': namedclass = ANYOF_ALNUM; break; |
5303 | case 'W': namedclass = ANYOF_NALNUM; break; | |
5304 | case 's': namedclass = ANYOF_SPACE; break; | |
5305 | case 'S': namedclass = ANYOF_NSPACE; break; | |
5306 | case 'd': namedclass = ANYOF_DIGIT; break; | |
5307 | case 'D': namedclass = ANYOF_NDIGIT; break; | |
ffc61ed2 JH |
5308 | case 'p': |
5309 | case 'P': | |
3dab1dad YO |
5310 | { |
5311 | char *e; | |
af6f566e | 5312 | if (RExC_parse >= RExC_end) |
2a4859cd | 5313 | vFAIL2("Empty \\%c{}", (U8)value); |
ffc61ed2 | 5314 | if (*RExC_parse == '{') { |
1df70142 | 5315 | const U8 c = (U8)value; |
ffc61ed2 JH |
5316 | e = strchr(RExC_parse++, '}'); |
5317 | if (!e) | |
0da60cf5 | 5318 | vFAIL2("Missing right brace on \\%c{}", c); |
ab13f0c7 JH |
5319 | while (isSPACE(UCHARAT(RExC_parse))) |
5320 | RExC_parse++; | |
5321 | if (e == RExC_parse) | |
0da60cf5 | 5322 | vFAIL2("Empty \\%c{}", c); |
ffc61ed2 | 5323 | n = e - RExC_parse; |
ab13f0c7 JH |
5324 | while (isSPACE(UCHARAT(RExC_parse + n - 1))) |
5325 | n--; | |
ffc61ed2 JH |
5326 | } |
5327 | else { | |
5328 | e = RExC_parse; | |
5329 | n = 1; | |
5330 | } | |
5331 | if (!SIZE_ONLY) { | |
ab13f0c7 JH |
5332 | if (UCHARAT(RExC_parse) == '^') { |
5333 | RExC_parse++; | |
5334 | n--; | |
5335 | value = value == 'p' ? 'P' : 'p'; /* toggle */ | |
5336 | while (isSPACE(UCHARAT(RExC_parse))) { | |
5337 | RExC_parse++; | |
5338 | n--; | |
5339 | } | |
5340 | } | |
097eb12c AL |
5341 | Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n", |
5342 | (value=='p' ? '+' : '!'), (int)n, RExC_parse); | |
ffc61ed2 JH |
5343 | } |
5344 | RExC_parse = e + 1; | |
5345 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; | |
f81125e2 | 5346 | namedclass = ANYOF_MAX; /* no official name, but it's named */ |
3dab1dad | 5347 | } |
f81125e2 | 5348 | break; |
b8c5462f JH |
5349 | case 'n': value = '\n'; break; |
5350 | case 'r': value = '\r'; break; | |
5351 | case 't': value = '\t'; break; | |
5352 | case 'f': value = '\f'; break; | |
5353 | case 'b': value = '\b'; break; | |
c7f1f016 NIS |
5354 | case 'e': value = ASCII_TO_NATIVE('\033');break; |
5355 | case 'a': value = ASCII_TO_NATIVE('\007');break; | |
b8c5462f | 5356 | case 'x': |
ffc61ed2 | 5357 | if (*RExC_parse == '{') { |
a4c04bdc NC |
5358 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
5359 | | PERL_SCAN_DISALLOW_PREFIX; | |
3dab1dad | 5360 | char * const e = strchr(RExC_parse++, '}'); |
b81d288d | 5361 | if (!e) |
ffc61ed2 | 5362 | vFAIL("Missing right brace on \\x{}"); |
53305cf1 NC |
5363 | |
5364 | numlen = e - RExC_parse; | |
5365 | value = grok_hex(RExC_parse, &numlen, &flags, NULL); | |
ffc61ed2 JH |
5366 | RExC_parse = e + 1; |
5367 | } | |
5368 | else { | |
a4c04bdc | 5369 | I32 flags = PERL_SCAN_DISALLOW_PREFIX; |
53305cf1 NC |
5370 | numlen = 2; |
5371 | value = grok_hex(RExC_parse, &numlen, &flags, NULL); | |
ffc61ed2 JH |
5372 | RExC_parse += numlen; |
5373 | } | |
b8c5462f JH |
5374 | break; |
5375 | case 'c': | |
830247a4 | 5376 | value = UCHARAT(RExC_parse++); |
b8c5462f JH |
5377 | value = toCTRL(value); |
5378 | break; | |
5379 | case '0': case '1': case '2': case '3': case '4': | |
5380 | case '5': case '6': case '7': case '8': case '9': | |
53305cf1 NC |
5381 | { |
5382 | I32 flags = 0; | |
5383 | numlen = 3; | |
5384 | value = grok_oct(--RExC_parse, &numlen, &flags, NULL); | |
830247a4 | 5385 | RExC_parse += numlen; |
b8c5462f | 5386 | break; |
53305cf1 | 5387 | } |
1028017a | 5388 | default: |
041457d9 | 5389 | if (!SIZE_ONLY && isALPHA(value) && ckWARN(WARN_REGEXP)) |
ffc61ed2 JH |
5390 | vWARN2(RExC_parse, |
5391 | "Unrecognized escape \\%c in character class passed through", | |
5392 | (int)value); | |
1028017a | 5393 | break; |
b8c5462f | 5394 | } |
ffc61ed2 | 5395 | } /* end of \blah */ |
1b2d223b JH |
5396 | #ifdef EBCDIC |
5397 | else | |
5398 | literal_endpoint++; | |
5399 | #endif | |
ffc61ed2 JH |
5400 | |
5401 | if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */ | |
5402 | ||
5403 | if (!SIZE_ONLY && !need_class) | |
936ed897 | 5404 | ANYOF_CLASS_ZERO(ret); |
ffc61ed2 | 5405 | |
936ed897 | 5406 | need_class = 1; |
ffc61ed2 JH |
5407 | |
5408 | /* a bad range like a-\d, a-[:digit:] ? */ | |
5409 | if (range) { | |
73b437c8 | 5410 | if (!SIZE_ONLY) { |
afd78fd5 | 5411 | if (ckWARN(WARN_REGEXP)) { |
097eb12c | 5412 | const int w = |
afd78fd5 JH |
5413 | RExC_parse >= rangebegin ? |
5414 | RExC_parse - rangebegin : 0; | |
830247a4 | 5415 | vWARN4(RExC_parse, |
b45f050a | 5416 | "False [] range \"%*.*s\"", |
097eb12c | 5417 | w, w, rangebegin); |
afd78fd5 | 5418 | } |
3568d838 JH |
5419 | if (prevvalue < 256) { |
5420 | ANYOF_BITMAP_SET(ret, prevvalue); | |
ffc61ed2 JH |
5421 | ANYOF_BITMAP_SET(ret, '-'); |
5422 | } | |
5423 | else { | |
5424 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; | |
5425 | Perl_sv_catpvf(aTHX_ listsv, | |
3568d838 | 5426 | "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-'); |
ffc61ed2 | 5427 | } |
b8c5462f | 5428 | } |
ffc61ed2 JH |
5429 | |
5430 | range = 0; /* this was not a true range */ | |
73b437c8 | 5431 | } |
ffc61ed2 | 5432 | |
73b437c8 | 5433 | if (!SIZE_ONLY) { |
c49a72a9 NC |
5434 | const char *what = NULL; |
5435 | char yesno = 0; | |
5436 | ||
3568d838 JH |
5437 | if (namedclass > OOB_NAMEDCLASS) |
5438 | optimize_invert = FALSE; | |
e2962f66 JH |
5439 | /* Possible truncation here but in some 64-bit environments |
5440 | * the compiler gets heartburn about switch on 64-bit values. | |
5441 | * A similar issue a little earlier when switching on value. | |
98f323fa | 5442 | * --jhi */ |
e2962f66 | 5443 | switch ((I32)namedclass) { |
73b437c8 JH |
5444 | case ANYOF_ALNUM: |
5445 | if (LOC) | |
936ed897 | 5446 | ANYOF_CLASS_SET(ret, ANYOF_ALNUM); |
73b437c8 JH |
5447 | else { |
5448 | for (value = 0; value < 256; value++) | |
5449 | if (isALNUM(value)) | |
936ed897 | 5450 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5451 | } |
c49a72a9 NC |
5452 | yesno = '+'; |
5453 | what = "Word"; | |
73b437c8 JH |
5454 | break; |
5455 | case ANYOF_NALNUM: | |
5456 | if (LOC) | |
936ed897 | 5457 | ANYOF_CLASS_SET(ret, ANYOF_NALNUM); |
73b437c8 JH |
5458 | else { |
5459 | for (value = 0; value < 256; value++) | |
5460 | if (!isALNUM(value)) | |
936ed897 | 5461 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5462 | } |
c49a72a9 NC |
5463 | yesno = '!'; |
5464 | what = "Word"; | |
73b437c8 | 5465 | break; |
ffc61ed2 | 5466 | case ANYOF_ALNUMC: |
73b437c8 | 5467 | if (LOC) |
ffc61ed2 | 5468 | ANYOF_CLASS_SET(ret, ANYOF_ALNUMC); |
73b437c8 JH |
5469 | else { |
5470 | for (value = 0; value < 256; value++) | |
ffc61ed2 | 5471 | if (isALNUMC(value)) |
936ed897 | 5472 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5473 | } |
c49a72a9 NC |
5474 | yesno = '+'; |
5475 | what = "Alnum"; | |
73b437c8 JH |
5476 | break; |
5477 | case ANYOF_NALNUMC: | |
5478 | if (LOC) | |
936ed897 | 5479 | ANYOF_CLASS_SET(ret, ANYOF_NALNUMC); |
73b437c8 JH |
5480 | else { |
5481 | for (value = 0; value < 256; value++) | |
5482 | if (!isALNUMC(value)) | |
936ed897 | 5483 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5484 | } |
c49a72a9 NC |
5485 | yesno = '!'; |
5486 | what = "Alnum"; | |
73b437c8 JH |
5487 | break; |
5488 | case ANYOF_ALPHA: | |
5489 | if (LOC) | |
936ed897 | 5490 | ANYOF_CLASS_SET(ret, ANYOF_ALPHA); |
73b437c8 JH |
5491 | else { |
5492 | for (value = 0; value < 256; value++) | |
5493 | if (isALPHA(value)) | |
936ed897 | 5494 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5495 | } |
c49a72a9 NC |
5496 | yesno = '+'; |
5497 | what = "Alpha"; | |
73b437c8 JH |
5498 | break; |
5499 | case ANYOF_NALPHA: | |
5500 | if (LOC) | |
936ed897 | 5501 | ANYOF_CLASS_SET(ret, ANYOF_NALPHA); |
73b437c8 JH |
5502 | else { |
5503 | for (value = 0; value < 256; value++) | |
5504 | if (!isALPHA(value)) | |
936ed897 | 5505 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5506 | } |
c49a72a9 NC |
5507 | yesno = '!'; |
5508 | what = "Alpha"; | |
73b437c8 JH |
5509 | break; |
5510 | case ANYOF_ASCII: | |
5511 | if (LOC) | |
936ed897 | 5512 | ANYOF_CLASS_SET(ret, ANYOF_ASCII); |
73b437c8 | 5513 | else { |
c7f1f016 | 5514 | #ifndef EBCDIC |
1ba5c669 JH |
5515 | for (value = 0; value < 128; value++) |
5516 | ANYOF_BITMAP_SET(ret, value); | |
5517 | #else /* EBCDIC */ | |
ffbc6a93 | 5518 | for (value = 0; value < 256; value++) { |
3a3c4447 JH |
5519 | if (isASCII(value)) |
5520 | ANYOF_BITMAP_SET(ret, value); | |
ffbc6a93 | 5521 | } |
1ba5c669 | 5522 | #endif /* EBCDIC */ |
73b437c8 | 5523 | } |
c49a72a9 NC |
5524 | yesno = '+'; |
5525 | what = "ASCII"; | |
73b437c8 JH |
5526 | break; |
5527 | case ANYOF_NASCII: | |
5528 | if (LOC) | |
936ed897 | 5529 | ANYOF_CLASS_SET(ret, ANYOF_NASCII); |
73b437c8 | 5530 | else { |
c7f1f016 | 5531 | #ifndef EBCDIC |
1ba5c669 JH |
5532 | for (value = 128; value < 256; value++) |
5533 | ANYOF_BITMAP_SET(ret, value); | |
5534 | #else /* EBCDIC */ | |
ffbc6a93 | 5535 | for (value = 0; value < 256; value++) { |
3a3c4447 JH |
5536 | if (!isASCII(value)) |
5537 | ANYOF_BITMAP_SET(ret, value); | |
ffbc6a93 | 5538 | } |
1ba5c669 | 5539 | #endif /* EBCDIC */ |
73b437c8 | 5540 | } |
c49a72a9 NC |
5541 | yesno = '!'; |
5542 | what = "ASCII"; | |
73b437c8 | 5543 | break; |
aaa51d5e JF |
5544 | case ANYOF_BLANK: |
5545 | if (LOC) | |
5546 | ANYOF_CLASS_SET(ret, ANYOF_BLANK); | |
5547 | else { | |
5548 | for (value = 0; value < 256; value++) | |
5549 | if (isBLANK(value)) | |
5550 | ANYOF_BITMAP_SET(ret, value); | |
5551 | } | |
c49a72a9 NC |
5552 | yesno = '+'; |
5553 | what = "Blank"; | |
aaa51d5e JF |
5554 | break; |
5555 | case ANYOF_NBLANK: | |
5556 | if (LOC) | |
5557 | ANYOF_CLASS_SET(ret, ANYOF_NBLANK); | |
5558 | else { | |
5559 | for (value = 0; value < 256; value++) | |
5560 | if (!isBLANK(value)) | |
5561 | ANYOF_BITMAP_SET(ret, value); | |
5562 | } | |
c49a72a9 NC |
5563 | yesno = '!'; |
5564 | what = "Blank"; | |
aaa51d5e | 5565 | break; |
73b437c8 JH |
5566 | case ANYOF_CNTRL: |
5567 | if (LOC) | |
936ed897 | 5568 | ANYOF_CLASS_SET(ret, ANYOF_CNTRL); |
73b437c8 JH |
5569 | else { |
5570 | for (value = 0; value < 256; value++) | |
5571 | if (isCNTRL(value)) | |
936ed897 | 5572 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5573 | } |
c49a72a9 NC |
5574 | yesno = '+'; |
5575 | what = "Cntrl"; | |
73b437c8 JH |
5576 | break; |
5577 | case ANYOF_NCNTRL: | |
5578 | if (LOC) | |
936ed897 | 5579 | ANYOF_CLASS_SET(ret, ANYOF_NCNTRL); |
73b437c8 JH |
5580 | else { |
5581 | for (value = 0; value < 256; value++) | |
5582 | if (!isCNTRL(value)) | |
936ed897 | 5583 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5584 | } |
c49a72a9 NC |
5585 | yesno = '!'; |
5586 | what = "Cntrl"; | |
ffc61ed2 JH |
5587 | break; |
5588 | case ANYOF_DIGIT: | |
5589 | if (LOC) | |
5590 | ANYOF_CLASS_SET(ret, ANYOF_DIGIT); | |
5591 | else { | |
5592 | /* consecutive digits assumed */ | |
5593 | for (value = '0'; value <= '9'; value++) | |
5594 | ANYOF_BITMAP_SET(ret, value); | |
5595 | } | |
c49a72a9 NC |
5596 | yesno = '+'; |
5597 | what = "Digit"; | |
ffc61ed2 JH |
5598 | break; |
5599 | case ANYOF_NDIGIT: | |
5600 | if (LOC) | |
5601 | ANYOF_CLASS_SET(ret, ANYOF_NDIGIT); | |
5602 | else { | |
5603 | /* consecutive digits assumed */ | |
5604 | for (value = 0; value < '0'; value++) | |
5605 | ANYOF_BITMAP_SET(ret, value); | |
5606 | for (value = '9' + 1; value < 256; value++) | |
5607 | ANYOF_BITMAP_SET(ret, value); | |
5608 | } | |
c49a72a9 NC |
5609 | yesno = '!'; |
5610 | what = "Digit"; | |
73b437c8 JH |
5611 | break; |
5612 | case ANYOF_GRAPH: | |
5613 | if (LOC) | |
936ed897 | 5614 | ANYOF_CLASS_SET(ret, ANYOF_GRAPH); |
73b437c8 JH |
5615 | else { |
5616 | for (value = 0; value < 256; value++) | |
5617 | if (isGRAPH(value)) | |
936ed897 | 5618 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5619 | } |
c49a72a9 NC |
5620 | yesno = '+'; |
5621 | what = "Graph"; | |
73b437c8 JH |
5622 | break; |
5623 | case ANYOF_NGRAPH: | |
5624 | if (LOC) | |
936ed897 | 5625 | ANYOF_CLASS_SET(ret, ANYOF_NGRAPH); |
73b437c8 JH |
5626 | else { |
5627 | for (value = 0; value < 256; value++) | |
5628 | if (!isGRAPH(value)) | |
936ed897 | 5629 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5630 | } |
c49a72a9 NC |
5631 | yesno = '!'; |
5632 | what = "Graph"; | |
73b437c8 JH |
5633 | break; |
5634 | case ANYOF_LOWER: | |
5635 | if (LOC) | |
936ed897 | 5636 | ANYOF_CLASS_SET(ret, ANYOF_LOWER); |
73b437c8 JH |
5637 | else { |
5638 | for (value = 0; value < 256; value++) | |
5639 | if (isLOWER(value)) | |
936ed897 | 5640 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5641 | } |
c49a72a9 NC |
5642 | yesno = '+'; |
5643 | what = "Lower"; | |
73b437c8 JH |
5644 | break; |
5645 | case ANYOF_NLOWER: | |
5646 | if (LOC) | |
936ed897 | 5647 | ANYOF_CLASS_SET(ret, ANYOF_NLOWER); |
73b437c8 JH |
5648 | else { |
5649 | for (value = 0; value < 256; value++) | |
5650 | if (!isLOWER(value)) | |
936ed897 | 5651 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5652 | } |
c49a72a9 NC |
5653 | yesno = '!'; |
5654 | what = "Lower"; | |
73b437c8 JH |
5655 | break; |
5656 | case ANYOF_PRINT: | |
5657 | if (LOC) | |
936ed897 | 5658 | ANYOF_CLASS_SET(ret, ANYOF_PRINT); |
73b437c8 JH |
5659 | else { |
5660 | for (value = 0; value < 256; value++) | |
5661 | if (isPRINT(value)) | |
936ed897 | 5662 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5663 | } |
c49a72a9 NC |
5664 | yesno = '+'; |
5665 | what = "Print"; | |
73b437c8 JH |
5666 | break; |
5667 | case ANYOF_NPRINT: | |
5668 | if (LOC) | |
936ed897 | 5669 | ANYOF_CLASS_SET(ret, ANYOF_NPRINT); |
73b437c8 JH |
5670 | else { |
5671 | for (value = 0; value < 256; value++) | |
5672 | if (!isPRINT(value)) | |
936ed897 | 5673 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5674 | } |
c49a72a9 NC |
5675 | yesno = '!'; |
5676 | what = "Print"; | |
73b437c8 | 5677 | break; |
aaa51d5e JF |
5678 | case ANYOF_PSXSPC: |
5679 | if (LOC) | |
5680 | ANYOF_CLASS_SET(ret, ANYOF_PSXSPC); | |
5681 | else { | |
5682 | for (value = 0; value < 256; value++) | |
5683 | if (isPSXSPC(value)) | |
5684 | ANYOF_BITMAP_SET(ret, value); | |
5685 | } | |
c49a72a9 NC |
5686 | yesno = '+'; |
5687 | what = "Space"; | |
aaa51d5e JF |
5688 | break; |
5689 | case ANYOF_NPSXSPC: | |
5690 | if (LOC) | |
5691 | ANYOF_CLASS_SET(ret, ANYOF_NPSXSPC); | |
5692 | else { | |
5693 | for (value = 0; value < 256; value++) | |
5694 | if (!isPSXSPC(value)) | |
5695 | ANYOF_BITMAP_SET(ret, value); | |
5696 | } | |
c49a72a9 NC |
5697 | yesno = '!'; |
5698 | what = "Space"; | |
aaa51d5e | 5699 | break; |
73b437c8 JH |
5700 | case ANYOF_PUNCT: |
5701 | if (LOC) | |
936ed897 | 5702 | ANYOF_CLASS_SET(ret, ANYOF_PUNCT); |
73b437c8 JH |
5703 | else { |
5704 | for (value = 0; value < 256; value++) | |
5705 | if (isPUNCT(value)) | |
936ed897 | 5706 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5707 | } |
c49a72a9 NC |
5708 | yesno = '+'; |
5709 | what = "Punct"; | |
73b437c8 JH |
5710 | break; |
5711 | case ANYOF_NPUNCT: | |
5712 | if (LOC) | |
936ed897 | 5713 | ANYOF_CLASS_SET(ret, ANYOF_NPUNCT); |
73b437c8 JH |
5714 | else { |
5715 | for (value = 0; value < 256; value++) | |
5716 | if (!isPUNCT(value)) | |
936ed897 | 5717 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5718 | } |
c49a72a9 NC |
5719 | yesno = '!'; |
5720 | what = "Punct"; | |
ffc61ed2 JH |
5721 | break; |
5722 | case ANYOF_SPACE: | |
5723 | if (LOC) | |
5724 | ANYOF_CLASS_SET(ret, ANYOF_SPACE); | |
5725 | else { | |
5726 | for (value = 0; value < 256; value++) | |
5727 | if (isSPACE(value)) | |
5728 | ANYOF_BITMAP_SET(ret, value); | |
5729 | } | |
c49a72a9 NC |
5730 | yesno = '+'; |
5731 | what = "SpacePerl"; | |
ffc61ed2 JH |
5732 | break; |
5733 | case ANYOF_NSPACE: | |
5734 | if (LOC) | |
5735 | ANYOF_CLASS_SET(ret, ANYOF_NSPACE); | |
5736 | else { | |
5737 | for (value = 0; value < 256; value++) | |
5738 | if (!isSPACE(value)) | |
5739 | ANYOF_BITMAP_SET(ret, value); | |
5740 | } | |
c49a72a9 NC |
5741 | yesno = '!'; |
5742 | what = "SpacePerl"; | |
73b437c8 JH |
5743 | break; |
5744 | case ANYOF_UPPER: | |
5745 | if (LOC) | |
936ed897 | 5746 | ANYOF_CLASS_SET(ret, ANYOF_UPPER); |
73b437c8 JH |
5747 | else { |
5748 | for (value = 0; value < 256; value++) | |
5749 | if (isUPPER(value)) | |
936ed897 | 5750 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5751 | } |
c49a72a9 NC |
5752 | yesno = '+'; |
5753 | what = "Upper"; | |
73b437c8 JH |
5754 | break; |
5755 | case ANYOF_NUPPER: | |
5756 | if (LOC) | |
936ed897 | 5757 | ANYOF_CLASS_SET(ret, ANYOF_NUPPER); |
73b437c8 JH |
5758 | else { |
5759 | for (value = 0; value < 256; value++) | |
5760 | if (!isUPPER(value)) | |
936ed897 | 5761 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5762 | } |
c49a72a9 NC |
5763 | yesno = '!'; |
5764 | what = "Upper"; | |
73b437c8 JH |
5765 | break; |
5766 | case ANYOF_XDIGIT: | |
5767 | if (LOC) | |
936ed897 | 5768 | ANYOF_CLASS_SET(ret, ANYOF_XDIGIT); |
73b437c8 JH |
5769 | else { |
5770 | for (value = 0; value < 256; value++) | |
5771 | if (isXDIGIT(value)) | |
936ed897 | 5772 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5773 | } |
c49a72a9 NC |
5774 | yesno = '+'; |
5775 | what = "XDigit"; | |
73b437c8 JH |
5776 | break; |
5777 | case ANYOF_NXDIGIT: | |
5778 | if (LOC) | |
936ed897 | 5779 | ANYOF_CLASS_SET(ret, ANYOF_NXDIGIT); |
73b437c8 JH |
5780 | else { |
5781 | for (value = 0; value < 256; value++) | |
5782 | if (!isXDIGIT(value)) | |
936ed897 | 5783 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 5784 | } |
c49a72a9 NC |
5785 | yesno = '!'; |
5786 | what = "XDigit"; | |
73b437c8 | 5787 | break; |
f81125e2 JP |
5788 | case ANYOF_MAX: |
5789 | /* this is to handle \p and \P */ | |
5790 | break; | |
73b437c8 | 5791 | default: |
b45f050a | 5792 | vFAIL("Invalid [::] class"); |
73b437c8 | 5793 | break; |
b8c5462f | 5794 | } |
c49a72a9 NC |
5795 | if (what) { |
5796 | /* Strings such as "+utf8::isWord\n" */ | |
5797 | Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what); | |
5798 | } | |
b8c5462f | 5799 | if (LOC) |
936ed897 | 5800 | ANYOF_FLAGS(ret) |= ANYOF_CLASS; |
73b437c8 | 5801 | continue; |
a0d0e21e | 5802 | } |
ffc61ed2 JH |
5803 | } /* end of namedclass \blah */ |
5804 | ||
a0d0e21e | 5805 | if (range) { |
eb160463 | 5806 | if (prevvalue > (IV)value) /* b-a */ { |
d4c19fe8 AL |
5807 | const int w = RExC_parse - rangebegin; |
5808 | Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin); | |
3568d838 | 5809 | range = 0; /* not a valid range */ |
73b437c8 | 5810 | } |
a0d0e21e LW |
5811 | } |
5812 | else { | |
3568d838 | 5813 | prevvalue = value; /* save the beginning of the range */ |
830247a4 IZ |
5814 | if (*RExC_parse == '-' && RExC_parse+1 < RExC_end && |
5815 | RExC_parse[1] != ']') { | |
5816 | RExC_parse++; | |
ffc61ed2 JH |
5817 | |
5818 | /* a bad range like \w-, [:word:]- ? */ | |
5819 | if (namedclass > OOB_NAMEDCLASS) { | |
afd78fd5 | 5820 | if (ckWARN(WARN_REGEXP)) { |
d4c19fe8 | 5821 | const int w = |
afd78fd5 JH |
5822 | RExC_parse >= rangebegin ? |
5823 | RExC_parse - rangebegin : 0; | |
830247a4 | 5824 | vWARN4(RExC_parse, |
b45f050a | 5825 | "False [] range \"%*.*s\"", |
097eb12c | 5826 | w, w, rangebegin); |
afd78fd5 | 5827 | } |
73b437c8 | 5828 | if (!SIZE_ONLY) |
936ed897 | 5829 | ANYOF_BITMAP_SET(ret, '-'); |
73b437c8 | 5830 | } else |
ffc61ed2 JH |
5831 | range = 1; /* yeah, it's a range! */ |
5832 | continue; /* but do it the next time */ | |
a0d0e21e | 5833 | } |
a687059c | 5834 | } |
ffc61ed2 | 5835 | |
93733859 | 5836 | /* now is the next time */ |
07be1b83 | 5837 | /*stored += (value - prevvalue + 1);*/ |
ae5c130c | 5838 | if (!SIZE_ONLY) { |
3568d838 | 5839 | if (prevvalue < 256) { |
1df70142 | 5840 | const IV ceilvalue = value < 256 ? value : 255; |
3dab1dad | 5841 | IV i; |
3568d838 | 5842 | #ifdef EBCDIC |
1b2d223b JH |
5843 | /* In EBCDIC [\x89-\x91] should include |
5844 | * the \x8e but [i-j] should not. */ | |
5845 | if (literal_endpoint == 2 && | |
5846 | ((isLOWER(prevvalue) && isLOWER(ceilvalue)) || | |
5847 | (isUPPER(prevvalue) && isUPPER(ceilvalue)))) | |
ffc61ed2 | 5848 | { |
3568d838 JH |
5849 | if (isLOWER(prevvalue)) { |
5850 | for (i = prevvalue; i <= ceilvalue; i++) | |
ffc61ed2 JH |
5851 | if (isLOWER(i)) |
5852 | ANYOF_BITMAP_SET(ret, i); | |
5853 | } else { | |
3568d838 | 5854 | for (i = prevvalue; i <= ceilvalue; i++) |
ffc61ed2 JH |
5855 | if (isUPPER(i)) |
5856 | ANYOF_BITMAP_SET(ret, i); | |
5857 | } | |
8ada0baa | 5858 | } |
ffc61ed2 | 5859 | else |
8ada0baa | 5860 | #endif |
07be1b83 YO |
5861 | for (i = prevvalue; i <= ceilvalue; i++) { |
5862 | if (!ANYOF_BITMAP_TEST(ret,i)) { | |
5863 | stored++; | |
5864 | ANYOF_BITMAP_SET(ret, i); | |
5865 | } | |
5866 | } | |
3568d838 | 5867 | } |
a5961de5 | 5868 | if (value > 255 || UTF) { |
1df70142 AL |
5869 | const UV prevnatvalue = NATIVE_TO_UNI(prevvalue); |
5870 | const UV natvalue = NATIVE_TO_UNI(value); | |
07be1b83 | 5871 | stored+=2; /* can't optimize this class */ |
ffc61ed2 | 5872 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; |
b08decb7 | 5873 | if (prevnatvalue < natvalue) { /* what about > ? */ |
ffc61ed2 | 5874 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n", |
b08decb7 JH |
5875 | prevnatvalue, natvalue); |
5876 | } | |
5877 | else if (prevnatvalue == natvalue) { | |
5878 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue); | |
09091399 | 5879 | if (FOLD) { |
89ebb4a3 | 5880 | U8 foldbuf[UTF8_MAXBYTES_CASE+1]; |
254ba52a | 5881 | STRLEN foldlen; |
1df70142 | 5882 | const UV f = to_uni_fold(natvalue, foldbuf, &foldlen); |
254ba52a | 5883 | |
c840d2a2 JH |
5884 | /* If folding and foldable and a single |
5885 | * character, insert also the folded version | |
5886 | * to the charclass. */ | |
9e55ce06 | 5887 | if (f != value) { |
eb160463 | 5888 | if (foldlen == (STRLEN)UNISKIP(f)) |
9e55ce06 JH |
5889 | Perl_sv_catpvf(aTHX_ listsv, |
5890 | "%04"UVxf"\n", f); | |
5891 | else { | |
5892 | /* Any multicharacter foldings | |
5893 | * require the following transform: | |
5894 | * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst) | |
5895 | * where E folds into "pq" and F folds | |
5896 | * into "rst", all other characters | |
5897 | * fold to single characters. We save | |
5898 | * away these multicharacter foldings, | |
5899 | * to be later saved as part of the | |
5900 | * additional "s" data. */ | |
5901 | SV *sv; | |
5902 | ||
5903 | if (!unicode_alternate) | |
5904 | unicode_alternate = newAV(); | |
5905 | sv = newSVpvn((char*)foldbuf, foldlen); | |
5906 | SvUTF8_on(sv); | |
5907 | av_push(unicode_alternate, sv); | |
5908 | } | |
5909 | } | |
254ba52a | 5910 | |
60a8b682 JH |
5911 | /* If folding and the value is one of the Greek |
5912 | * sigmas insert a few more sigmas to make the | |
5913 | * folding rules of the sigmas to work right. | |
5914 | * Note that not all the possible combinations | |
5915 | * are handled here: some of them are handled | |
9e55ce06 JH |
5916 | * by the standard folding rules, and some of |
5917 | * them (literal or EXACTF cases) are handled | |
5918 | * during runtime in regexec.c:S_find_byclass(). */ | |
09091399 JH |
5919 | if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) { |
5920 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", | |
eb050b28 | 5921 | (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA); |
09091399 | 5922 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", |
eb050b28 | 5923 | (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA); |
09091399 JH |
5924 | } |
5925 | else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA) | |
5926 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", | |
eb050b28 | 5927 | (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA); |
09091399 JH |
5928 | } |
5929 | } | |
ffc61ed2 | 5930 | } |
1b2d223b JH |
5931 | #ifdef EBCDIC |
5932 | literal_endpoint = 0; | |
5933 | #endif | |
8ada0baa | 5934 | } |
ffc61ed2 JH |
5935 | |
5936 | range = 0; /* this range (if it was one) is done now */ | |
a0d0e21e | 5937 | } |
ffc61ed2 | 5938 | |
936ed897 | 5939 | if (need_class) { |
4f66b38d | 5940 | ANYOF_FLAGS(ret) |= ANYOF_LARGE; |
936ed897 | 5941 | if (SIZE_ONLY) |
830247a4 | 5942 | RExC_size += ANYOF_CLASS_ADD_SKIP; |
936ed897 | 5943 | else |
830247a4 | 5944 | RExC_emit += ANYOF_CLASS_ADD_SKIP; |
936ed897 | 5945 | } |
ffc61ed2 | 5946 | |
7f6f358c YO |
5947 | |
5948 | if (SIZE_ONLY) | |
5949 | return ret; | |
5950 | /****** !SIZE_ONLY AFTER HERE *********/ | |
5951 | ||
5952 | if( stored == 1 && value < 256 | |
5953 | && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) ) | |
5954 | ) { | |
5955 | /* optimize single char class to an EXACT node | |
5956 | but *only* when its not a UTF/high char */ | |
07be1b83 YO |
5957 | const char * cur_parse= RExC_parse; |
5958 | RExC_emit = (regnode *)orig_emit; | |
5959 | RExC_parse = (char *)orig_parse; | |
7f6f358c YO |
5960 | ret = reg_node(pRExC_state, |
5961 | (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT)); | |
07be1b83 | 5962 | RExC_parse = (char *)cur_parse; |
7f6f358c YO |
5963 | *STRING(ret)= (char)value; |
5964 | STR_LEN(ret)= 1; | |
5965 | RExC_emit += STR_SZ(1); | |
5966 | return ret; | |
5967 | } | |
ae5c130c | 5968 | /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */ |
7f6f358c | 5969 | if ( /* If the only flag is folding (plus possibly inversion). */ |
516a5887 JH |
5970 | ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD) |
5971 | ) { | |
a0ed51b3 | 5972 | for (value = 0; value < 256; ++value) { |
936ed897 | 5973 | if (ANYOF_BITMAP_TEST(ret, value)) { |
eb160463 | 5974 | UV fold = PL_fold[value]; |
ffc61ed2 JH |
5975 | |
5976 | if (fold != value) | |
5977 | ANYOF_BITMAP_SET(ret, fold); | |
ae5c130c GS |
5978 | } |
5979 | } | |
936ed897 | 5980 | ANYOF_FLAGS(ret) &= ~ANYOF_FOLD; |
ae5c130c | 5981 | } |
ffc61ed2 | 5982 | |
ae5c130c | 5983 | /* optimize inverted simple patterns (e.g. [^a-z]) */ |
7f6f358c | 5984 | if (optimize_invert && |
ffc61ed2 JH |
5985 | /* If the only flag is inversion. */ |
5986 | (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) { | |
b8c5462f | 5987 | for (value = 0; value < ANYOF_BITMAP_SIZE; ++value) |
936ed897 | 5988 | ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL; |
1aa99e6b | 5989 | ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL; |
ae5c130c | 5990 | } |
7f6f358c | 5991 | { |
097eb12c | 5992 | AV * const av = newAV(); |
ffc61ed2 | 5993 | SV *rv; |
9e55ce06 | 5994 | /* The 0th element stores the character class description |
6a0407ee | 5995 | * in its textual form: used later (regexec.c:Perl_regclass_swash()) |
9e55ce06 JH |
5996 | * to initialize the appropriate swash (which gets stored in |
5997 | * the 1st element), and also useful for dumping the regnode. | |
5998 | * The 2nd element stores the multicharacter foldings, | |
6a0407ee | 5999 | * used later (regexec.c:S_reginclass()). */ |
ffc61ed2 JH |
6000 | av_store(av, 0, listsv); |
6001 | av_store(av, 1, NULL); | |
9e55ce06 | 6002 | av_store(av, 2, (SV*)unicode_alternate); |
ffc61ed2 | 6003 | rv = newRV_noinc((SV*)av); |
19860706 | 6004 | n = add_data(pRExC_state, 1, "s"); |
830247a4 | 6005 | RExC_rx->data->data[n] = (void*)rv; |
ffc61ed2 | 6006 | ARG_SET(ret, n); |
a0ed51b3 | 6007 | } |
a0ed51b3 LW |
6008 | return ret; |
6009 | } | |
6010 | ||
76e3520e | 6011 | STATIC char* |
830247a4 | 6012 | S_nextchar(pTHX_ RExC_state_t *pRExC_state) |
a0d0e21e | 6013 | { |
097eb12c | 6014 | char* const retval = RExC_parse++; |
a0d0e21e | 6015 | |
4633a7c4 | 6016 | for (;;) { |
830247a4 IZ |
6017 | if (*RExC_parse == '(' && RExC_parse[1] == '?' && |
6018 | RExC_parse[2] == '#') { | |
e994fd66 AE |
6019 | while (*RExC_parse != ')') { |
6020 | if (RExC_parse == RExC_end) | |
6021 | FAIL("Sequence (?#... not terminated"); | |
830247a4 | 6022 | RExC_parse++; |
e994fd66 | 6023 | } |
830247a4 | 6024 | RExC_parse++; |
4633a7c4 LW |
6025 | continue; |
6026 | } | |
e2509266 | 6027 | if (RExC_flags & PMf_EXTENDED) { |
830247a4 IZ |
6028 | if (isSPACE(*RExC_parse)) { |
6029 | RExC_parse++; | |
748a9306 LW |
6030 | continue; |
6031 | } | |
830247a4 | 6032 | else if (*RExC_parse == '#') { |
e994fd66 AE |
6033 | while (RExC_parse < RExC_end) |
6034 | if (*RExC_parse++ == '\n') break; | |
748a9306 LW |
6035 | continue; |
6036 | } | |
748a9306 | 6037 | } |
4633a7c4 | 6038 | return retval; |
a0d0e21e | 6039 | } |
a687059c LW |
6040 | } |
6041 | ||
6042 | /* | |
c277df42 | 6043 | - reg_node - emit a node |
a0d0e21e | 6044 | */ |
76e3520e | 6045 | STATIC regnode * /* Location. */ |
830247a4 | 6046 | S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op) |
a687059c | 6047 | { |
97aff369 | 6048 | dVAR; |
c277df42 | 6049 | register regnode *ptr; |
504618e9 | 6050 | regnode * const ret = RExC_emit; |
07be1b83 | 6051 | GET_RE_DEBUG_FLAGS_DECL; |
a687059c | 6052 | |
c277df42 | 6053 | if (SIZE_ONLY) { |
830247a4 IZ |
6054 | SIZE_ALIGN(RExC_size); |
6055 | RExC_size += 1; | |
a0d0e21e LW |
6056 | return(ret); |
6057 | } | |
c277df42 | 6058 | NODE_ALIGN_FILL(ret); |
a0d0e21e | 6059 | ptr = ret; |
c277df42 | 6060 | FILL_ADVANCE_NODE(ptr, op); |
fac92740 | 6061 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 6062 | MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n", |
fac92740 MJD |
6063 | "reg_node", __LINE__, |
6064 | reg_name[op], | |
07be1b83 YO |
6065 | (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] |
6066 | ? "Overwriting end of array!\n" : "OK", | |
6067 | (UV)(RExC_emit - RExC_emit_start), | |
6068 | (UV)(RExC_parse - RExC_start), | |
6069 | (UV)RExC_offsets[0])); | |
ccb2c380 | 6070 | Set_Node_Offset(RExC_emit, RExC_parse + (op == END)); |
fac92740 | 6071 | } |
07be1b83 | 6072 | |
830247a4 | 6073 | RExC_emit = ptr; |
a687059c | 6074 | |
a0d0e21e | 6075 | return(ret); |
a687059c LW |
6076 | } |
6077 | ||
6078 | /* | |
a0d0e21e LW |
6079 | - reganode - emit a node with an argument |
6080 | */ | |
76e3520e | 6081 | STATIC regnode * /* Location. */ |
830247a4 | 6082 | S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg) |
fe14fcc3 | 6083 | { |
97aff369 | 6084 | dVAR; |
c277df42 | 6085 | register regnode *ptr; |
504618e9 | 6086 | regnode * const ret = RExC_emit; |
07be1b83 | 6087 | GET_RE_DEBUG_FLAGS_DECL; |
fe14fcc3 | 6088 | |
c277df42 | 6089 | if (SIZE_ONLY) { |
830247a4 IZ |
6090 | SIZE_ALIGN(RExC_size); |
6091 | RExC_size += 2; | |
a0d0e21e LW |
6092 | return(ret); |
6093 | } | |
fe14fcc3 | 6094 | |
c277df42 | 6095 | NODE_ALIGN_FILL(ret); |
a0d0e21e | 6096 | ptr = ret; |
c277df42 | 6097 | FILL_ADVANCE_NODE_ARG(ptr, op, arg); |
fac92740 | 6098 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 6099 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n", |
fac92740 | 6100 | "reganode", |
ccb2c380 MP |
6101 | __LINE__, |
6102 | reg_name[op], | |
07be1b83 | 6103 | (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ? |
fac92740 | 6104 | "Overwriting end of array!\n" : "OK", |
07be1b83 YO |
6105 | (UV)(RExC_emit - RExC_emit_start), |
6106 | (UV)(RExC_parse - RExC_start), | |
6107 | (UV)RExC_offsets[0])); | |
ccb2c380 | 6108 | Set_Cur_Node_Offset; |
fac92740 MJD |
6109 | } |
6110 | ||
830247a4 | 6111 | RExC_emit = ptr; |
fe14fcc3 | 6112 | |
a0d0e21e | 6113 | return(ret); |
fe14fcc3 LW |
6114 | } |
6115 | ||
6116 | /* | |
cd439c50 | 6117 | - reguni - emit (if appropriate) a Unicode character |
a0ed51b3 | 6118 | */ |
71207a34 AL |
6119 | STATIC STRLEN |
6120 | S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s) | |
a0ed51b3 | 6121 | { |
97aff369 | 6122 | dVAR; |
71207a34 | 6123 | return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s); |
a0ed51b3 LW |
6124 | } |
6125 | ||
6126 | /* | |
a0d0e21e LW |
6127 | - reginsert - insert an operator in front of already-emitted operand |
6128 | * | |
6129 | * Means relocating the operand. | |
6130 | */ | |
76e3520e | 6131 | STATIC void |
830247a4 | 6132 | S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd) |
a687059c | 6133 | { |
97aff369 | 6134 | dVAR; |
c277df42 IZ |
6135 | register regnode *src; |
6136 | register regnode *dst; | |
6137 | register regnode *place; | |
504618e9 | 6138 | const int offset = regarglen[(U8)op]; |
07be1b83 | 6139 | GET_RE_DEBUG_FLAGS_DECL; |
22c35a8c | 6140 | /* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */ |
c277df42 IZ |
6141 | |
6142 | if (SIZE_ONLY) { | |
830247a4 | 6143 | RExC_size += NODE_STEP_REGNODE + offset; |
a0d0e21e LW |
6144 | return; |
6145 | } | |
a687059c | 6146 | |
830247a4 IZ |
6147 | src = RExC_emit; |
6148 | RExC_emit += NODE_STEP_REGNODE + offset; | |
6149 | dst = RExC_emit; | |
fac92740 | 6150 | while (src > opnd) { |
c277df42 | 6151 | StructCopy(--src, --dst, regnode); |
fac92740 | 6152 | if (RExC_offsets) { /* MJD 20010112 */ |
07be1b83 | 6153 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n", |
fac92740 | 6154 | "reg_insert", |
ccb2c380 MP |
6155 | __LINE__, |
6156 | reg_name[op], | |
07be1b83 YO |
6157 | (UV)(dst - RExC_emit_start) > RExC_offsets[0] |
6158 | ? "Overwriting end of array!\n" : "OK", | |
6159 | (UV)(src - RExC_emit_start), | |
6160 | (UV)(dst - RExC_emit_start), | |
6161 | (UV)RExC_offsets[0])); | |
ccb2c380 MP |
6162 | Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src)); |
6163 | Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src)); | |
fac92740 MJD |
6164 | } |
6165 | } | |
6166 | ||
a0d0e21e LW |
6167 | |
6168 | place = opnd; /* Op node, where operand used to be. */ | |
fac92740 | 6169 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 6170 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n", |
fac92740 | 6171 | "reginsert", |
ccb2c380 MP |
6172 | __LINE__, |
6173 | reg_name[op], | |
07be1b83 | 6174 | (UV)(place - RExC_emit_start) > RExC_offsets[0] |
fac92740 | 6175 | ? "Overwriting end of array!\n" : "OK", |
07be1b83 YO |
6176 | (UV)(place - RExC_emit_start), |
6177 | (UV)(RExC_parse - RExC_start), | |
fac92740 | 6178 | RExC_offsets[0])); |
ccb2c380 | 6179 | Set_Node_Offset(place, RExC_parse); |
45948336 | 6180 | Set_Node_Length(place, 1); |
fac92740 | 6181 | } |
c277df42 IZ |
6182 | src = NEXTOPER(place); |
6183 | FILL_ADVANCE_NODE(place, op); | |
6184 | Zero(src, offset, regnode); | |
a687059c LW |
6185 | } |
6186 | ||
6187 | /* | |
c277df42 | 6188 | - regtail - set the next-pointer at the end of a node chain of p to val. |
3dab1dad | 6189 | - SEE ALSO: regtail_study |
a0d0e21e | 6190 | */ |
097eb12c | 6191 | /* TODO: All three parms should be const */ |
76e3520e | 6192 | STATIC void |
3dab1dad | 6193 | S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth) |
a687059c | 6194 | { |
97aff369 | 6195 | dVAR; |
c277df42 | 6196 | register regnode *scan; |
72f13be8 | 6197 | GET_RE_DEBUG_FLAGS_DECL; |
f9049ba1 SP |
6198 | #ifndef DEBUGGING |
6199 | PERL_UNUSED_ARG(depth); | |
6200 | #endif | |
a0d0e21e | 6201 | |
c277df42 | 6202 | if (SIZE_ONLY) |
a0d0e21e LW |
6203 | return; |
6204 | ||
6205 | /* Find last node. */ | |
6206 | scan = p; | |
6207 | for (;;) { | |
504618e9 | 6208 | regnode * const temp = regnext(scan); |
3dab1dad YO |
6209 | DEBUG_PARSE_r({ |
6210 | SV * const mysv=sv_newmortal(); | |
6211 | DEBUG_PARSE_MSG((scan==p ? "tail" : "")); | |
6212 | regprop(RExC_rx, mysv, scan); | |
6213 | PerlIO_printf(Perl_debug_log, "~ %s (%d)\n", | |
6214 | SvPV_nolen_const(mysv), REG_NODE_NUM(scan)); | |
6215 | }); | |
6216 | if (temp == NULL) | |
6217 | break; | |
6218 | scan = temp; | |
6219 | } | |
6220 | ||
6221 | if (reg_off_by_arg[OP(scan)]) { | |
6222 | ARG_SET(scan, val - scan); | |
6223 | } | |
6224 | else { | |
6225 | NEXT_OFF(scan) = val - scan; | |
6226 | } | |
6227 | } | |
6228 | ||
07be1b83 | 6229 | #ifdef DEBUGGING |
3dab1dad YO |
6230 | /* |
6231 | - regtail_study - set the next-pointer at the end of a node chain of p to val. | |
6232 | - Look for optimizable sequences at the same time. | |
6233 | - currently only looks for EXACT chains. | |
07be1b83 YO |
6234 | |
6235 | This is expermental code. The idea is to use this routine to perform | |
6236 | in place optimizations on branches and groups as they are constructed, | |
6237 | with the long term intention of removing optimization from study_chunk so | |
6238 | that it is purely analytical. | |
6239 | ||
6240 | Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used | |
6241 | to control which is which. | |
6242 | ||
3dab1dad YO |
6243 | */ |
6244 | /* TODO: All four parms should be const */ | |
07be1b83 | 6245 | |
3dab1dad YO |
6246 | STATIC U8 |
6247 | S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth) | |
6248 | { | |
6249 | dVAR; | |
6250 | register regnode *scan; | |
07be1b83 YO |
6251 | U8 exact = PSEUDO; |
6252 | #ifdef EXPERIMENTAL_INPLACESCAN | |
6253 | I32 min = 0; | |
6254 | #endif | |
6255 | ||
3dab1dad YO |
6256 | GET_RE_DEBUG_FLAGS_DECL; |
6257 | ||
07be1b83 | 6258 | |
3dab1dad YO |
6259 | if (SIZE_ONLY) |
6260 | return exact; | |
6261 | ||
6262 | /* Find last node. */ | |
6263 | ||
6264 | scan = p; | |
6265 | for (;;) { | |
6266 | regnode * const temp = regnext(scan); | |
07be1b83 YO |
6267 | #ifdef EXPERIMENTAL_INPLACESCAN |
6268 | if (PL_regkind[OP(scan)] == EXACT) | |
6269 | if (join_exact(pRExC_state,scan,&min,1,val,depth+1)) | |
6270 | return EXACT; | |
6271 | #endif | |
3dab1dad YO |
6272 | if ( exact ) { |
6273 | switch (OP(scan)) { | |
6274 | case EXACT: | |
6275 | case EXACTF: | |
6276 | case EXACTFL: | |
6277 | if( exact == PSEUDO ) | |
6278 | exact= OP(scan); | |
07be1b83 YO |
6279 | else if ( exact != OP(scan) ) |
6280 | exact= 0; | |
3dab1dad YO |
6281 | case NOTHING: |
6282 | break; | |
6283 | default: | |
6284 | exact= 0; | |
6285 | } | |
6286 | } | |
6287 | DEBUG_PARSE_r({ | |
6288 | SV * const mysv=sv_newmortal(); | |
6289 | DEBUG_PARSE_MSG((scan==p ? "tsdy" : "")); | |
6290 | regprop(RExC_rx, mysv, scan); | |
6291 | PerlIO_printf(Perl_debug_log, "~ %s (%s) (%d)\n", | |
6292 | SvPV_nolen_const(mysv), | |
6293 | reg_name[exact], | |
6294 | REG_NODE_NUM(scan)); | |
6295 | }); | |
a0d0e21e LW |
6296 | if (temp == NULL) |
6297 | break; | |
6298 | scan = temp; | |
6299 | } | |
07be1b83 YO |
6300 | DEBUG_PARSE_r({ |
6301 | SV * const mysv_val=sv_newmortal(); | |
6302 | DEBUG_PARSE_MSG(""); | |
6303 | regprop(RExC_rx, mysv_val, val); | |
6304 | PerlIO_printf(Perl_debug_log, "~ attach to %s (%d) offset to %d\n", | |
6305 | SvPV_nolen_const(mysv_val), | |
6306 | REG_NODE_NUM(val), | |
6307 | val - scan | |
6308 | ); | |
6309 | }); | |
c277df42 IZ |
6310 | if (reg_off_by_arg[OP(scan)]) { |
6311 | ARG_SET(scan, val - scan); | |
a0ed51b3 LW |
6312 | } |
6313 | else { | |
c277df42 IZ |
6314 | NEXT_OFF(scan) = val - scan; |
6315 | } | |
3dab1dad YO |
6316 | |
6317 | return exact; | |
a687059c | 6318 | } |
07be1b83 | 6319 | #endif |
a687059c LW |
6320 | |
6321 | /* | |
a687059c LW |
6322 | - regcurly - a little FSA that accepts {\d+,?\d*} |
6323 | */ | |
79072805 | 6324 | STATIC I32 |
5f66b61c | 6325 | S_regcurly(register const char *s) |
a687059c LW |
6326 | { |
6327 | if (*s++ != '{') | |
6328 | return FALSE; | |
f0fcb552 | 6329 | if (!isDIGIT(*s)) |
a687059c | 6330 | return FALSE; |
f0fcb552 | 6331 | while (isDIGIT(*s)) |
a687059c LW |
6332 | s++; |
6333 | if (*s == ',') | |
6334 | s++; | |
f0fcb552 | 6335 | while (isDIGIT(*s)) |
a687059c LW |
6336 | s++; |
6337 | if (*s != '}') | |
6338 | return FALSE; | |
6339 | return TRUE; | |
6340 | } | |
6341 | ||
a687059c LW |
6342 | |
6343 | /* | |
fd181c75 | 6344 | - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form |
a687059c LW |
6345 | */ |
6346 | void | |
097eb12c | 6347 | Perl_regdump(pTHX_ const regexp *r) |
a687059c | 6348 | { |
35ff7856 | 6349 | #ifdef DEBUGGING |
97aff369 | 6350 | dVAR; |
c445ea15 | 6351 | SV * const sv = sv_newmortal(); |
ab3bbdeb | 6352 | SV *dsv= sv_newmortal(); |
a687059c | 6353 | |
4f639d21 | 6354 | (void)dumpuntil(r, r->program, r->program + 1, NULL, sv, 0); |
a0d0e21e LW |
6355 | |
6356 | /* Header fields of interest. */ | |
ab3bbdeb YO |
6357 | if (r->anchored_substr) { |
6358 | RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr), | |
6359 | RE_SV_DUMPLEN(r->anchored_substr), 30); | |
7b0972df | 6360 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
6361 | "anchored %s%s at %"IVdf" ", |
6362 | s, RE_SV_TAIL(r->anchored_substr), | |
7b0972df | 6363 | (IV)r->anchored_offset); |
ab3bbdeb YO |
6364 | } else if (r->anchored_utf8) { |
6365 | RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8), | |
6366 | RE_SV_DUMPLEN(r->anchored_utf8), 30); | |
33b8afdf | 6367 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
6368 | "anchored utf8 %s%s at %"IVdf" ", |
6369 | s, RE_SV_TAIL(r->anchored_utf8), | |
33b8afdf | 6370 | (IV)r->anchored_offset); |
ab3bbdeb YO |
6371 | } |
6372 | if (r->float_substr) { | |
6373 | RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr), | |
6374 | RE_SV_DUMPLEN(r->float_substr), 30); | |
7b0972df | 6375 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
6376 | "floating %s%s at %"IVdf"..%"UVuf" ", |
6377 | s, RE_SV_TAIL(r->float_substr), | |
7b0972df | 6378 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
ab3bbdeb YO |
6379 | } else if (r->float_utf8) { |
6380 | RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8), | |
6381 | RE_SV_DUMPLEN(r->float_utf8), 30); | |
33b8afdf | 6382 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
6383 | "floating utf8 %s%s at %"IVdf"..%"UVuf" ", |
6384 | s, RE_SV_TAIL(r->float_utf8), | |
33b8afdf | 6385 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
ab3bbdeb | 6386 | } |
33b8afdf | 6387 | if (r->check_substr || r->check_utf8) |
b81d288d AB |
6388 | PerlIO_printf(Perl_debug_log, |
6389 | r->check_substr == r->float_substr | |
33b8afdf | 6390 | && r->check_utf8 == r->float_utf8 |
c277df42 IZ |
6391 | ? "(checking floating" : "(checking anchored"); |
6392 | if (r->reganch & ROPT_NOSCAN) | |
6393 | PerlIO_printf(Perl_debug_log, " noscan"); | |
6394 | if (r->reganch & ROPT_CHECK_ALL) | |
6395 | PerlIO_printf(Perl_debug_log, " isall"); | |
33b8afdf | 6396 | if (r->check_substr || r->check_utf8) |
c277df42 IZ |
6397 | PerlIO_printf(Perl_debug_log, ") "); |
6398 | ||
46fc3d4c | 6399 | if (r->regstclass) { |
32fc9b6a | 6400 | regprop(r, sv, r->regstclass); |
3f7c398e | 6401 | PerlIO_printf(Perl_debug_log, "stclass \"%s\" ", SvPVX_const(sv)); |
46fc3d4c | 6402 | } |
774d564b | 6403 | if (r->reganch & ROPT_ANCH) { |
6404 | PerlIO_printf(Perl_debug_log, "anchored"); | |
6405 | if (r->reganch & ROPT_ANCH_BOL) | |
6406 | PerlIO_printf(Perl_debug_log, "(BOL)"); | |
c277df42 IZ |
6407 | if (r->reganch & ROPT_ANCH_MBOL) |
6408 | PerlIO_printf(Perl_debug_log, "(MBOL)"); | |
cad2e5aa JH |
6409 | if (r->reganch & ROPT_ANCH_SBOL) |
6410 | PerlIO_printf(Perl_debug_log, "(SBOL)"); | |
774d564b | 6411 | if (r->reganch & ROPT_ANCH_GPOS) |
6412 | PerlIO_printf(Perl_debug_log, "(GPOS)"); | |
6413 | PerlIO_putc(Perl_debug_log, ' '); | |
6414 | } | |
c277df42 IZ |
6415 | if (r->reganch & ROPT_GPOS_SEEN) |
6416 | PerlIO_printf(Perl_debug_log, "GPOS "); | |
a0d0e21e | 6417 | if (r->reganch & ROPT_SKIP) |
760ac839 | 6418 | PerlIO_printf(Perl_debug_log, "plus "); |
a0d0e21e | 6419 | if (r->reganch & ROPT_IMPLICIT) |
760ac839 | 6420 | PerlIO_printf(Perl_debug_log, "implicit "); |
760ac839 | 6421 | PerlIO_printf(Perl_debug_log, "minlen %ld ", (long) r->minlen); |
ce862d02 IZ |
6422 | if (r->reganch & ROPT_EVAL_SEEN) |
6423 | PerlIO_printf(Perl_debug_log, "with eval "); | |
760ac839 | 6424 | PerlIO_printf(Perl_debug_log, "\n"); |
65e66c80 | 6425 | #else |
96a5add6 | 6426 | PERL_UNUSED_CONTEXT; |
65e66c80 | 6427 | PERL_UNUSED_ARG(r); |
17c3b450 | 6428 | #endif /* DEBUGGING */ |
a687059c LW |
6429 | } |
6430 | ||
6431 | /* | |
a0d0e21e LW |
6432 | - regprop - printable representation of opcode |
6433 | */ | |
46fc3d4c | 6434 | void |
32fc9b6a | 6435 | Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o) |
a687059c | 6436 | { |
35ff7856 | 6437 | #ifdef DEBUGGING |
97aff369 | 6438 | dVAR; |
9b155405 | 6439 | register int k; |
a0d0e21e | 6440 | |
54dc92de | 6441 | sv_setpvn(sv, "", 0); |
9b155405 | 6442 | if (OP(o) >= reg_num) /* regnode.type is unsigned */ |
830247a4 IZ |
6443 | /* It would be nice to FAIL() here, but this may be called from |
6444 | regexec.c, and it would be hard to supply pRExC_state. */ | |
6445 | Perl_croak(aTHX_ "Corrupted regexp opcode"); | |
bfed75c6 | 6446 | sv_catpv(sv, reg_name[OP(o)]); /* Take off const! */ |
9b155405 | 6447 | |
3dab1dad | 6448 | k = PL_regkind[OP(o)]; |
9b155405 | 6449 | |
2a782b5b | 6450 | if (k == EXACT) { |
396482e1 | 6451 | SV * const dsv = sv_2mortal(newSVpvs("")); |
ab3bbdeb YO |
6452 | /* Using is_utf8_string() (via PERL_PV_UNI_DETECT) |
6453 | * is a crude hack but it may be the best for now since | |
6454 | * we have no flag "this EXACTish node was UTF-8" | |
6455 | * --jhi */ | |
6456 | const char * const s = | |
6457 | pv_pretty(dsv, (U8*)STRING(o), STR_LEN(o), 60, | |
6458 | PL_colors[0], PL_colors[1], | |
6459 | PERL_PV_ESCAPE_UNI_DETECT | | |
6460 | PERL_PV_PRETTY_ELIPSES | | |
6461 | PERL_PV_PRETTY_LTGT | |
6462 | ); | |
6463 | Perl_sv_catpvf(aTHX_ sv, " %s", s ); | |
bb263b4e | 6464 | } else if (k == TRIE) { |
3dab1dad YO |
6465 | Perl_sv_catpvf(aTHX_ sv, "-%s",reg_name[o->flags]); |
6466 | /* print the details of the trie in dumpuntil instead, as | |
4f639d21 | 6467 | * prog->data isn't available here */ |
a3621e74 | 6468 | } else if (k == CURLY) { |
cb434fcc | 6469 | if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX) |
cea2e8a9 GS |
6470 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */ |
6471 | Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o)); | |
a0d0e21e | 6472 | } |
2c2d71f5 JH |
6473 | else if (k == WHILEM && o->flags) /* Ordinal/of */ |
6474 | Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4); | |
9b155405 | 6475 | else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP ) |
894356b3 | 6476 | Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */ |
9b155405 | 6477 | else if (k == LOGICAL) |
04ebc1ab | 6478 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */ |
653099ff GS |
6479 | else if (k == ANYOF) { |
6480 | int i, rangestart = -1; | |
2d03de9c | 6481 | const U8 flags = ANYOF_FLAGS(o); |
0bd48802 AL |
6482 | |
6483 | /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */ | |
6484 | static const char * const anyofs[] = { | |
653099ff GS |
6485 | "\\w", |
6486 | "\\W", | |
6487 | "\\s", | |
6488 | "\\S", | |
6489 | "\\d", | |
6490 | "\\D", | |
6491 | "[:alnum:]", | |
6492 | "[:^alnum:]", | |
6493 | "[:alpha:]", | |
6494 | "[:^alpha:]", | |
6495 | "[:ascii:]", | |
6496 | "[:^ascii:]", | |
6497 | "[:ctrl:]", | |
6498 | "[:^ctrl:]", | |
6499 | "[:graph:]", | |
6500 | "[:^graph:]", | |
6501 | "[:lower:]", | |
6502 | "[:^lower:]", | |
6503 | "[:print:]", | |
6504 | "[:^print:]", | |
6505 | "[:punct:]", | |
6506 | "[:^punct:]", | |
6507 | "[:upper:]", | |
aaa51d5e | 6508 | "[:^upper:]", |
653099ff | 6509 | "[:xdigit:]", |
aaa51d5e JF |
6510 | "[:^xdigit:]", |
6511 | "[:space:]", | |
6512 | "[:^space:]", | |
6513 | "[:blank:]", | |
6514 | "[:^blank:]" | |
653099ff GS |
6515 | }; |
6516 | ||
19860706 | 6517 | if (flags & ANYOF_LOCALE) |
396482e1 | 6518 | sv_catpvs(sv, "{loc}"); |
19860706 | 6519 | if (flags & ANYOF_FOLD) |
396482e1 | 6520 | sv_catpvs(sv, "{i}"); |
653099ff | 6521 | Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]); |
19860706 | 6522 | if (flags & ANYOF_INVERT) |
396482e1 | 6523 | sv_catpvs(sv, "^"); |
ffc61ed2 JH |
6524 | for (i = 0; i <= 256; i++) { |
6525 | if (i < 256 && ANYOF_BITMAP_TEST(o,i)) { | |
6526 | if (rangestart == -1) | |
6527 | rangestart = i; | |
6528 | } else if (rangestart != -1) { | |
6529 | if (i <= rangestart + 3) | |
6530 | for (; rangestart < i; rangestart++) | |
653099ff | 6531 | put_byte(sv, rangestart); |
ffc61ed2 JH |
6532 | else { |
6533 | put_byte(sv, rangestart); | |
396482e1 | 6534 | sv_catpvs(sv, "-"); |
ffc61ed2 | 6535 | put_byte(sv, i - 1); |
653099ff | 6536 | } |
ffc61ed2 | 6537 | rangestart = -1; |
653099ff | 6538 | } |
847a199f | 6539 | } |
ffc61ed2 JH |
6540 | |
6541 | if (o->flags & ANYOF_CLASS) | |
bb7a0f54 | 6542 | for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++) |
ffc61ed2 JH |
6543 | if (ANYOF_CLASS_TEST(o,i)) |
6544 | sv_catpv(sv, anyofs[i]); | |
6545 | ||
6546 | if (flags & ANYOF_UNICODE) | |
396482e1 | 6547 | sv_catpvs(sv, "{unicode}"); |
1aa99e6b | 6548 | else if (flags & ANYOF_UNICODE_ALL) |
396482e1 | 6549 | sv_catpvs(sv, "{unicode_all}"); |
ffc61ed2 JH |
6550 | |
6551 | { | |
6552 | SV *lv; | |
32fc9b6a | 6553 | SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0); |
b81d288d | 6554 | |
ffc61ed2 JH |
6555 | if (lv) { |
6556 | if (sw) { | |
89ebb4a3 | 6557 | U8 s[UTF8_MAXBYTES_CASE+1]; |
b81d288d | 6558 | |
ffc61ed2 | 6559 | for (i = 0; i <= 256; i++) { /* just the first 256 */ |
1df70142 | 6560 | uvchr_to_utf8(s, i); |
ffc61ed2 | 6561 | |
3568d838 | 6562 | if (i < 256 && swash_fetch(sw, s, TRUE)) { |
ffc61ed2 JH |
6563 | if (rangestart == -1) |
6564 | rangestart = i; | |
6565 | } else if (rangestart != -1) { | |
ffc61ed2 JH |
6566 | if (i <= rangestart + 3) |
6567 | for (; rangestart < i; rangestart++) { | |
2d03de9c AL |
6568 | const U8 * const e = uvchr_to_utf8(s,rangestart); |
6569 | U8 *p; | |
6570 | for(p = s; p < e; p++) | |
ffc61ed2 JH |
6571 | put_byte(sv, *p); |
6572 | } | |
6573 | else { | |
2d03de9c AL |
6574 | const U8 *e = uvchr_to_utf8(s,rangestart); |
6575 | U8 *p; | |
6576 | for (p = s; p < e; p++) | |
ffc61ed2 | 6577 | put_byte(sv, *p); |
396482e1 | 6578 | sv_catpvs(sv, "-"); |
2d03de9c AL |
6579 | e = uvchr_to_utf8(s, i-1); |
6580 | for (p = s; p < e; p++) | |
1df70142 | 6581 | put_byte(sv, *p); |
ffc61ed2 JH |
6582 | } |
6583 | rangestart = -1; | |
6584 | } | |
19860706 | 6585 | } |
ffc61ed2 | 6586 | |
396482e1 | 6587 | sv_catpvs(sv, "..."); /* et cetera */ |
19860706 | 6588 | } |
fde631ed | 6589 | |
ffc61ed2 | 6590 | { |
2e0de35c | 6591 | char *s = savesvpv(lv); |
c445ea15 | 6592 | char * const origs = s; |
b81d288d | 6593 | |
3dab1dad YO |
6594 | while (*s && *s != '\n') |
6595 | s++; | |
b81d288d | 6596 | |
ffc61ed2 | 6597 | if (*s == '\n') { |
2d03de9c | 6598 | const char * const t = ++s; |
ffc61ed2 JH |
6599 | |
6600 | while (*s) { | |
6601 | if (*s == '\n') | |
6602 | *s = ' '; | |
6603 | s++; | |
6604 | } | |
6605 | if (s[-1] == ' ') | |
6606 | s[-1] = 0; | |
6607 | ||
6608 | sv_catpv(sv, t); | |
fde631ed | 6609 | } |
b81d288d | 6610 | |
ffc61ed2 | 6611 | Safefree(origs); |
fde631ed JH |
6612 | } |
6613 | } | |
653099ff | 6614 | } |
ffc61ed2 | 6615 | |
653099ff GS |
6616 | Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]); |
6617 | } | |
9b155405 | 6618 | else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH)) |
07be1b83 | 6619 | Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags)); |
65e66c80 | 6620 | #else |
96a5add6 | 6621 | PERL_UNUSED_CONTEXT; |
65e66c80 SP |
6622 | PERL_UNUSED_ARG(sv); |
6623 | PERL_UNUSED_ARG(o); | |
f9049ba1 | 6624 | PERL_UNUSED_ARG(prog); |
17c3b450 | 6625 | #endif /* DEBUGGING */ |
35ff7856 | 6626 | } |
a687059c | 6627 | |
cad2e5aa JH |
6628 | SV * |
6629 | Perl_re_intuit_string(pTHX_ regexp *prog) | |
6630 | { /* Assume that RE_INTUIT is set */ | |
97aff369 | 6631 | dVAR; |
a3621e74 | 6632 | GET_RE_DEBUG_FLAGS_DECL; |
96a5add6 AL |
6633 | PERL_UNUSED_CONTEXT; |
6634 | ||
a3621e74 | 6635 | DEBUG_COMPILE_r( |
cfd0369c | 6636 | { |
2d03de9c | 6637 | const char * const s = SvPV_nolen_const(prog->check_substr |
cfd0369c | 6638 | ? prog->check_substr : prog->check_utf8); |
cad2e5aa JH |
6639 | |
6640 | if (!PL_colorset) reginitcolors(); | |
6641 | PerlIO_printf(Perl_debug_log, | |
a0288114 | 6642 | "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n", |
33b8afdf JH |
6643 | PL_colors[4], |
6644 | prog->check_substr ? "" : "utf8 ", | |
6645 | PL_colors[5],PL_colors[0], | |
cad2e5aa JH |
6646 | s, |
6647 | PL_colors[1], | |
6648 | (strlen(s) > 60 ? "..." : "")); | |
6649 | } ); | |
6650 | ||
33b8afdf | 6651 | return prog->check_substr ? prog->check_substr : prog->check_utf8; |
cad2e5aa JH |
6652 | } |
6653 | ||
2b69d0c2 | 6654 | void |
864dbfa3 | 6655 | Perl_pregfree(pTHX_ struct regexp *r) |
a687059c | 6656 | { |
27da23d5 | 6657 | dVAR; |
0df25f3d YO |
6658 | |
6659 | ||
6660 | ||
fc32ee4a | 6661 | GET_RE_DEBUG_FLAGS_DECL; |
a3621e74 | 6662 | |
7821416a IZ |
6663 | if (!r || (--r->refcnt > 0)) |
6664 | return; | |
ab3bbdeb | 6665 | DEBUG_COMPILE_r({ |
0df25f3d YO |
6666 | if (!PL_colorset) |
6667 | reginitcolors(); | |
ab3bbdeb YO |
6668 | if (RX_DEBUG(r)){ |
6669 | SV *dsv= sv_newmortal(); | |
6670 | RE_PV_QUOTED_DECL(s, (r->reganch & ROPT_UTF8), | |
6671 | dsv, r->precomp, r->prelen, 60); | |
6672 | PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n", | |
6673 | PL_colors[4],PL_colors[5],s); | |
6674 | } | |
9e55ce06 | 6675 | }); |
cad2e5aa | 6676 | |
43c5f42d NC |
6677 | /* gcov results gave these as non-null 100% of the time, so there's no |
6678 | optimisation in checking them before calling Safefree */ | |
6679 | Safefree(r->precomp); | |
6680 | Safefree(r->offsets); /* 20010421 MJD */ | |
ed252734 | 6681 | RX_MATCH_COPY_FREE(r); |
f8c7b90f | 6682 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
6683 | if (r->saved_copy) |
6684 | SvREFCNT_dec(r->saved_copy); | |
6685 | #endif | |
a193d654 GS |
6686 | if (r->substrs) { |
6687 | if (r->anchored_substr) | |
6688 | SvREFCNT_dec(r->anchored_substr); | |
33b8afdf JH |
6689 | if (r->anchored_utf8) |
6690 | SvREFCNT_dec(r->anchored_utf8); | |
a193d654 GS |
6691 | if (r->float_substr) |
6692 | SvREFCNT_dec(r->float_substr); | |
33b8afdf JH |
6693 | if (r->float_utf8) |
6694 | SvREFCNT_dec(r->float_utf8); | |
2779dcf1 | 6695 | Safefree(r->substrs); |
a193d654 | 6696 | } |
c277df42 IZ |
6697 | if (r->data) { |
6698 | int n = r->data->count; | |
f3548bdc DM |
6699 | PAD* new_comppad = NULL; |
6700 | PAD* old_comppad; | |
4026c95a | 6701 | PADOFFSET refcnt; |
dfad63ad | 6702 | |
c277df42 | 6703 | while (--n >= 0) { |
261faec3 | 6704 | /* If you add a ->what type here, update the comment in regcomp.h */ |
c277df42 IZ |
6705 | switch (r->data->what[n]) { |
6706 | case 's': | |
6707 | SvREFCNT_dec((SV*)r->data->data[n]); | |
6708 | break; | |
653099ff GS |
6709 | case 'f': |
6710 | Safefree(r->data->data[n]); | |
6711 | break; | |
dfad63ad HS |
6712 | case 'p': |
6713 | new_comppad = (AV*)r->data->data[n]; | |
6714 | break; | |
c277df42 | 6715 | case 'o': |
dfad63ad | 6716 | if (new_comppad == NULL) |
cea2e8a9 | 6717 | Perl_croak(aTHX_ "panic: pregfree comppad"); |
f3548bdc DM |
6718 | PAD_SAVE_LOCAL(old_comppad, |
6719 | /* Watch out for global destruction's random ordering. */ | |
c445ea15 | 6720 | (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL |
f3548bdc | 6721 | ); |
b34c0dd4 | 6722 | OP_REFCNT_LOCK; |
4026c95a SH |
6723 | refcnt = OpREFCNT_dec((OP_4tree*)r->data->data[n]); |
6724 | OP_REFCNT_UNLOCK; | |
6725 | if (!refcnt) | |
9b978d73 | 6726 | op_free((OP_4tree*)r->data->data[n]); |
9b978d73 | 6727 | |
f3548bdc | 6728 | PAD_RESTORE_LOCAL(old_comppad); |
dfad63ad HS |
6729 | SvREFCNT_dec((SV*)new_comppad); |
6730 | new_comppad = NULL; | |
c277df42 IZ |
6731 | break; |
6732 | case 'n': | |
9e55ce06 | 6733 | break; |
07be1b83 | 6734 | case 'T': |
be8e71aa YO |
6735 | { /* Aho Corasick add-on structure for a trie node. |
6736 | Used in stclass optimization only */ | |
07be1b83 YO |
6737 | U32 refcount; |
6738 | reg_ac_data *aho=(reg_ac_data*)r->data->data[n]; | |
6739 | OP_REFCNT_LOCK; | |
6740 | refcount = --aho->refcount; | |
6741 | OP_REFCNT_UNLOCK; | |
6742 | if ( !refcount ) { | |
6743 | Safefree(aho->states); | |
6744 | Safefree(aho->fail); | |
6745 | aho->trie=NULL; /* not necessary to free this as it is | |
6746 | handled by the 't' case */ | |
6747 | Safefree(r->data->data[n]); /* do this last!!!! */ | |
be8e71aa | 6748 | Safefree(r->regstclass); |
07be1b83 YO |
6749 | } |
6750 | } | |
6751 | break; | |
a3621e74 | 6752 | case 't': |
07be1b83 | 6753 | { |
be8e71aa | 6754 | /* trie structure. */ |
07be1b83 YO |
6755 | U32 refcount; |
6756 | reg_trie_data *trie=(reg_trie_data*)r->data->data[n]; | |
6757 | OP_REFCNT_LOCK; | |
6758 | refcount = --trie->refcount; | |
6759 | OP_REFCNT_UNLOCK; | |
6760 | if ( !refcount ) { | |
6761 | Safefree(trie->charmap); | |
6762 | if (trie->widecharmap) | |
6763 | SvREFCNT_dec((SV*)trie->widecharmap); | |
6764 | Safefree(trie->states); | |
6765 | Safefree(trie->trans); | |
6766 | if (trie->bitmap) | |
6767 | Safefree(trie->bitmap); | |
6768 | if (trie->wordlen) | |
6769 | Safefree(trie->wordlen); | |
a3621e74 | 6770 | #ifdef DEBUGGING |
be8e71aa YO |
6771 | if (RX_DEBUG(r)) { |
6772 | if (trie->words) | |
6773 | SvREFCNT_dec((SV*)trie->words); | |
6774 | if (trie->revcharmap) | |
6775 | SvREFCNT_dec((SV*)trie->revcharmap); | |
6776 | } | |
a3621e74 | 6777 | #endif |
07be1b83 | 6778 | Safefree(r->data->data[n]); /* do this last!!!! */ |
a3621e74 | 6779 | } |
07be1b83 YO |
6780 | } |
6781 | break; | |
c277df42 | 6782 | default: |
830247a4 | 6783 | Perl_croak(aTHX_ "panic: regfree data code '%c'", r->data->what[n]); |
c277df42 IZ |
6784 | } |
6785 | } | |
6786 | Safefree(r->data->what); | |
6787 | Safefree(r->data); | |
a0d0e21e LW |
6788 | } |
6789 | Safefree(r->startp); | |
6790 | Safefree(r->endp); | |
6791 | Safefree(r); | |
a687059c | 6792 | } |
c277df42 | 6793 | |
76234dfb | 6794 | #ifndef PERL_IN_XSUB_RE |
c277df42 IZ |
6795 | /* |
6796 | - regnext - dig the "next" pointer out of a node | |
c277df42 IZ |
6797 | */ |
6798 | regnode * | |
864dbfa3 | 6799 | Perl_regnext(pTHX_ register regnode *p) |
c277df42 | 6800 | { |
97aff369 | 6801 | dVAR; |
c277df42 IZ |
6802 | register I32 offset; |
6803 | ||
3280af22 | 6804 | if (p == &PL_regdummy) |
c277df42 IZ |
6805 | return(NULL); |
6806 | ||
6807 | offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p)); | |
6808 | if (offset == 0) | |
6809 | return(NULL); | |
6810 | ||
c277df42 | 6811 | return(p+offset); |
c277df42 | 6812 | } |
76234dfb | 6813 | #endif |
c277df42 | 6814 | |
01f988be | 6815 | STATIC void |
cea2e8a9 | 6816 | S_re_croak2(pTHX_ const char* pat1,const char* pat2,...) |
c277df42 IZ |
6817 | { |
6818 | va_list args; | |
6819 | STRLEN l1 = strlen(pat1); | |
6820 | STRLEN l2 = strlen(pat2); | |
6821 | char buf[512]; | |
06bf62c7 | 6822 | SV *msv; |
73d840c0 | 6823 | const char *message; |
c277df42 IZ |
6824 | |
6825 | if (l1 > 510) | |
6826 | l1 = 510; | |
6827 | if (l1 + l2 > 510) | |
6828 | l2 = 510 - l1; | |
6829 | Copy(pat1, buf, l1 , char); | |
6830 | Copy(pat2, buf + l1, l2 , char); | |
3b818b81 GS |
6831 | buf[l1 + l2] = '\n'; |
6832 | buf[l1 + l2 + 1] = '\0'; | |
8736538c AS |
6833 | #ifdef I_STDARG |
6834 | /* ANSI variant takes additional second argument */ | |
c277df42 | 6835 | va_start(args, pat2); |
8736538c AS |
6836 | #else |
6837 | va_start(args); | |
6838 | #endif | |
5a844595 | 6839 | msv = vmess(buf, &args); |
c277df42 | 6840 | va_end(args); |
cfd0369c | 6841 | message = SvPV_const(msv,l1); |
c277df42 IZ |
6842 | if (l1 > 512) |
6843 | l1 = 512; | |
6844 | Copy(message, buf, l1 , char); | |
197cf9b9 | 6845 | buf[l1-1] = '\0'; /* Overwrite \n */ |
cea2e8a9 | 6846 | Perl_croak(aTHX_ "%s", buf); |
c277df42 | 6847 | } |
a0ed51b3 LW |
6848 | |
6849 | /* XXX Here's a total kludge. But we need to re-enter for swash routines. */ | |
6850 | ||
76234dfb | 6851 | #ifndef PERL_IN_XSUB_RE |
a0ed51b3 | 6852 | void |
864dbfa3 | 6853 | Perl_save_re_context(pTHX) |
b81d288d | 6854 | { |
97aff369 | 6855 | dVAR; |
1ade1aa1 NC |
6856 | |
6857 | struct re_save_state *state; | |
6858 | ||
6859 | SAVEVPTR(PL_curcop); | |
6860 | SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1); | |
6861 | ||
6862 | state = (struct re_save_state *)(PL_savestack + PL_savestack_ix); | |
6863 | PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE; | |
6864 | SSPUSHINT(SAVEt_RE_STATE); | |
6865 | ||
46ab3289 | 6866 | Copy(&PL_reg_state, state, 1, struct re_save_state); |
1ade1aa1 | 6867 | |
a0ed51b3 | 6868 | PL_reg_start_tmp = 0; |
a0ed51b3 | 6869 | PL_reg_start_tmpl = 0; |
c445ea15 | 6870 | PL_reg_oldsaved = NULL; |
a5db57d6 | 6871 | PL_reg_oldsavedlen = 0; |
a5db57d6 | 6872 | PL_reg_maxiter = 0; |
a5db57d6 | 6873 | PL_reg_leftiter = 0; |
c445ea15 | 6874 | PL_reg_poscache = NULL; |
a5db57d6 | 6875 | PL_reg_poscache_size = 0; |
1ade1aa1 NC |
6876 | #ifdef PERL_OLD_COPY_ON_WRITE |
6877 | PL_nrs = NULL; | |
6878 | #endif | |
ada6e8a9 | 6879 | |
c445ea15 AL |
6880 | /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */ |
6881 | if (PL_curpm) { | |
6882 | const REGEXP * const rx = PM_GETRE(PL_curpm); | |
6883 | if (rx) { | |
1df70142 | 6884 | U32 i; |
ada6e8a9 | 6885 | for (i = 1; i <= rx->nparens; i++) { |
1df70142 | 6886 | char digits[TYPE_CHARS(long)]; |
d9fad198 | 6887 | const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i); |
49f27e4b NC |
6888 | GV *const *const gvp |
6889 | = (GV**)hv_fetch(PL_defstash, digits, len, 0); | |
6890 | ||
b37c2d43 AL |
6891 | if (gvp) { |
6892 | GV * const gv = *gvp; | |
6893 | if (SvTYPE(gv) == SVt_PVGV && GvSV(gv)) | |
6894 | save_scalar(gv); | |
49f27e4b | 6895 | } |
ada6e8a9 AMS |
6896 | } |
6897 | } | |
6898 | } | |
a0ed51b3 | 6899 | } |
76234dfb | 6900 | #endif |
51371543 | 6901 | |
51371543 | 6902 | static void |
acfe0abc | 6903 | clear_re(pTHX_ void *r) |
51371543 | 6904 | { |
97aff369 | 6905 | dVAR; |
51371543 GS |
6906 | ReREFCNT_dec((regexp *)r); |
6907 | } | |
ffbc6a93 | 6908 | |
a28509cc AL |
6909 | #ifdef DEBUGGING |
6910 | ||
6911 | STATIC void | |
6912 | S_put_byte(pTHX_ SV *sv, int c) | |
6913 | { | |
6914 | if (isCNTRL(c) || c == 255 || !isPRINT(c)) | |
6915 | Perl_sv_catpvf(aTHX_ sv, "\\%o", c); | |
6916 | else if (c == '-' || c == ']' || c == '\\' || c == '^') | |
6917 | Perl_sv_catpvf(aTHX_ sv, "\\%c", c); | |
6918 | else | |
6919 | Perl_sv_catpvf(aTHX_ sv, "%c", c); | |
6920 | } | |
6921 | ||
3dab1dad YO |
6922 | #define CLEAR_OPTSTART \ |
6923 | if (optstart) STMT_START { \ | |
07be1b83 | 6924 | DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%d nodes)\n", node - optstart)); \ |
3dab1dad YO |
6925 | optstart=NULL; \ |
6926 | } STMT_END | |
6927 | ||
6928 | #define DUMPUNTIL(a,b,c,d,e,f) CLEAR_OPTSTART; node=dumpuntil(a,b,c,d,e,f); | |
6929 | ||
b5a2f8d8 NC |
6930 | STATIC const regnode * |
6931 | S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node, | |
6932 | const regnode *last, SV* sv, I32 l) | |
a28509cc | 6933 | { |
97aff369 | 6934 | dVAR; |
a28509cc | 6935 | register U8 op = EXACT; /* Arbitrary non-END op. */ |
b5a2f8d8 | 6936 | register const regnode *next; |
3dab1dad YO |
6937 | const regnode *optstart= NULL; |
6938 | GET_RE_DEBUG_FLAGS_DECL; | |
a28509cc AL |
6939 | |
6940 | while (op != END && (!last || node < last)) { | |
6941 | /* While that wasn't END last time... */ | |
6942 | ||
6943 | NODE_ALIGN(node); | |
6944 | op = OP(node); | |
6945 | if (op == CLOSE) | |
6946 | l--; | |
b5a2f8d8 | 6947 | next = regnext((regnode *)node); |
07be1b83 | 6948 | |
a28509cc | 6949 | /* Where, what. */ |
8e11feef | 6950 | if (OP(node) == OPTIMIZED) { |
e68ec53f | 6951 | if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE)) |
8e11feef | 6952 | optstart = node; |
3dab1dad | 6953 | else |
8e11feef | 6954 | goto after_print; |
3dab1dad YO |
6955 | } else |
6956 | CLEAR_OPTSTART; | |
07be1b83 | 6957 | |
32fc9b6a | 6958 | regprop(r, sv, node); |
a28509cc AL |
6959 | PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start), |
6960 | (int)(2*l + 1), "", SvPVX_const(sv)); | |
3dab1dad YO |
6961 | |
6962 | if (OP(node) != OPTIMIZED) { | |
8e11feef RGS |
6963 | if (next == NULL) /* Next ptr. */ |
6964 | PerlIO_printf(Perl_debug_log, "(0)"); | |
6965 | else | |
6966 | PerlIO_printf(Perl_debug_log, "(%"IVdf")", (IV)(next - start)); | |
6967 | (void)PerlIO_putc(Perl_debug_log, '\n'); | |
3dab1dad YO |
6968 | } |
6969 | ||
a28509cc AL |
6970 | after_print: |
6971 | if (PL_regkind[(U8)op] == BRANCHJ) { | |
be8e71aa YO |
6972 | assert(next); |
6973 | { | |
6974 | register const regnode *nnode = (OP(next) == LONGJMP | |
b5a2f8d8 NC |
6975 | ? regnext((regnode *)next) |
6976 | : next); | |
be8e71aa YO |
6977 | if (last && nnode > last) |
6978 | nnode = last; | |
6979 | DUMPUNTIL(r, start, NEXTOPER(NEXTOPER(node)), nnode, sv, l + 1); | |
6980 | } | |
a28509cc AL |
6981 | } |
6982 | else if (PL_regkind[(U8)op] == BRANCH) { | |
be8e71aa | 6983 | assert(next); |
3dab1dad | 6984 | DUMPUNTIL(r, start, NEXTOPER(node), next, sv, l + 1); |
a28509cc AL |
6985 | } |
6986 | else if ( PL_regkind[(U8)op] == TRIE ) { | |
6987 | const I32 n = ARG(node); | |
4f639d21 | 6988 | const reg_trie_data * const trie = (reg_trie_data*)r->data->data[n]; |
a28509cc AL |
6989 | const I32 arry_len = av_len(trie->words)+1; |
6990 | I32 word_idx; | |
6991 | PerlIO_printf(Perl_debug_log, | |
07be1b83 | 6992 | "%*s[StS:%"UVuf" Wds:%d Cs:%d Uq:%d #Sts:%"IVdf" Mn:%d Mx:%d", |
8e11feef RGS |
6993 | (int)(2*(l+3)), |
6994 | "", | |
6995 | trie->startstate, | |
6996 | TRIE_WORDCOUNT(trie), | |
6997 | (int)TRIE_CHARCOUNT(trie), | |
6998 | trie->uniquecharcount, | |
6999 | (IV)TRIE_LASTSTATE(trie)-1, | |
be8e71aa YO |
7000 | (int)trie->minlen, |
7001 | (int)trie->maxlen | |
8e11feef | 7002 | ); |
3dab1dad YO |
7003 | if (trie->bitmap) { |
7004 | int i; | |
7005 | int rangestart= -1; | |
7006 | sv_setpvn(sv, "", 0); | |
7007 | for (i = 0; i <= 256; i++) { | |
7008 | if (i < 256 && TRIE_BITMAP_TEST(trie,i)) { | |
7009 | if (rangestart == -1) | |
7010 | rangestart = i; | |
7011 | } else if (rangestart != -1) { | |
7012 | if (i <= rangestart + 3) | |
7013 | for (; rangestart < i; rangestart++) | |
7014 | put_byte(sv, rangestart); | |
7015 | else { | |
7016 | put_byte(sv, rangestart); | |
7017 | sv_catpvs(sv, "-"); | |
7018 | put_byte(sv, i - 1); | |
7019 | } | |
7020 | rangestart = -1; | |
7021 | } | |
7022 | } | |
07be1b83 | 7023 | PerlIO_printf(Perl_debug_log, " Stcls:%s]\n", SvPVX_const(sv)); |
3dab1dad | 7024 | } else |
07be1b83 | 7025 | PerlIO_printf(Perl_debug_log, " No-Stcls]\n"); |
a28509cc AL |
7026 | |
7027 | for (word_idx=0; word_idx < arry_len; word_idx++) { | |
097eb12c | 7028 | SV ** const elem_ptr = av_fetch(trie->words,word_idx,0); |
ab3bbdeb YO |
7029 | if (elem_ptr) |
7030 | PerlIO_printf(Perl_debug_log, "%*s%s\n", | |
a28509cc | 7031 | (int)(2*(l+4)), "", |
ab3bbdeb YO |
7032 | pv_pretty(sv, (U8*)SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60, |
7033 | PL_colors[0], PL_colors[1], | |
7034 | (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) | | |
7035 | PERL_PV_PRETTY_ELIPSES | | |
7036 | PERL_PV_PRETTY_LTGT | |
7037 | ) | |
a28509cc | 7038 | ); |
a28509cc | 7039 | } |
a28509cc AL |
7040 | |
7041 | node = NEXTOPER(node); | |
7042 | node += regarglen[(U8)op]; | |
7043 | ||
7044 | } | |
7045 | else if ( op == CURLY) { /* "next" might be very big: optimizer */ | |
3dab1dad | 7046 | DUMPUNTIL(r, start, NEXTOPER(node) + EXTRA_STEP_2ARGS, |
a28509cc AL |
7047 | NEXTOPER(node) + EXTRA_STEP_2ARGS + 1, sv, l + 1); |
7048 | } | |
7049 | else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) { | |
be8e71aa | 7050 | assert(next); |
3dab1dad | 7051 | DUMPUNTIL(r, start, NEXTOPER(node) + EXTRA_STEP_2ARGS, |
a28509cc AL |
7052 | next, sv, l + 1); |
7053 | } | |
7054 | else if ( op == PLUS || op == STAR) { | |
3dab1dad | 7055 | DUMPUNTIL(r, start, NEXTOPER(node), NEXTOPER(node) + 1, sv, l + 1); |
a28509cc AL |
7056 | } |
7057 | else if (op == ANYOF) { | |
7058 | /* arglen 1 + class block */ | |
7059 | node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE) | |
7060 | ? ANYOF_CLASS_SKIP : ANYOF_SKIP); | |
7061 | node = NEXTOPER(node); | |
7062 | } | |
7063 | else if (PL_regkind[(U8)op] == EXACT) { | |
7064 | /* Literal string, where present. */ | |
7065 | node += NODE_SZ_STR(node) - 1; | |
7066 | node = NEXTOPER(node); | |
7067 | } | |
7068 | else { | |
7069 | node = NEXTOPER(node); | |
7070 | node += regarglen[(U8)op]; | |
7071 | } | |
7072 | if (op == CURLYX || op == OPEN) | |
7073 | l++; | |
7074 | else if (op == WHILEM) | |
7075 | l--; | |
7076 | } | |
3dab1dad | 7077 | CLEAR_OPTSTART; |
a28509cc AL |
7078 | return node; |
7079 | } | |
7080 | ||
7081 | #endif /* DEBUGGING */ | |
7082 | ||
241d1a3b NC |
7083 | /* |
7084 | * Local variables: | |
7085 | * c-indentation-style: bsd | |
7086 | * c-basic-offset: 4 | |
7087 | * indent-tabs-mode: t | |
7088 | * End: | |
7089 | * | |
37442d52 RGS |
7090 | * ex: set ts=8 sts=4 sw=4 noet: |
7091 | */ |