3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2005, 2006 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
11 typedef OP OP_4tree; /* Will be redefined later. */
14 /* Convert branch sequences to more efficient trie ops? */
15 #define PERL_ENABLE_TRIE_OPTIMISATION 1
17 /* Be really agressive about optimising patterns with trie sequences? */
18 #define PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION 1
20 /* Should the optimiser take positive assertions into account? */
21 #define PERL_ENABLE_POSITIVE_ASSERTION_STUDY 0
23 /* Not for production use: */
24 #define PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS 0
26 /* Activate offsets code - set to if 1 to enable */
28 #define RE_TRACK_PATTERN_OFFSETS
31 /* Unless the next line is uncommented it is illegal to combine lazy
32 matching with possessive matching. Frankly it doesn't make much sense
33 to allow it as X*?+ matches nothing, X+?+ matches a single char only,
34 and X{min,max}?+ matches min times only.
36 /* #define REG_ALLOW_MINMOD_SUSPEND */
39 * The "internal use only" fields in regexp.h are present to pass info from
40 * compile to execute that permits the execute phase to run lots faster on
41 * simple cases. They are:
43 * regstart sv that must begin a match; NULL if none obvious
44 * reganch is the match anchored (at beginning-of-line only)?
45 * regmust string (pointer into program) that match must include, or NULL
46 * [regmust changed to SV* for bminstr()--law]
47 * regmlen length of regmust string
48 * [regmlen not used currently]
50 * Regstart and reganch permit very fast decisions on suitable starting points
51 * for a match, cutting down the work a lot. Regmust permits fast rejection
52 * of lines that cannot possibly match. The regmust tests are costly enough
53 * that pregcomp() supplies a regmust only if the r.e. contains something
54 * potentially expensive (at present, the only such thing detected is * or +
55 * at the start of the r.e., which can involve a lot of backup). Regmlen is
56 * supplied because the test in pregexec() needs it and pregcomp() is computing
58 * [regmust is now supplied always. The tests that use regmust have a
59 * heuristic that disables the test if it usually matches.]
61 * [In fact, we now use regmust in many cases to locate where the search
62 * starts in the string, so if regback is >= 0, the regmust search is never
63 * wasted effort. The regback variable says how many characters back from
64 * where regmust matched is the earliest possible start of the match.
65 * For instance, /[a-z].foo/ has a regmust of 'foo' and a regback of 2.]
69 * Structure for regexp "program". This is essentially a linear encoding
70 * of a nondeterministic finite-state machine (aka syntax charts or
71 * "railroad normal form" in parsing technology). Each node is an opcode
72 * plus a "next" pointer, possibly plus an operand. "Next" pointers of
73 * all nodes except BRANCH implement concatenation; a "next" pointer with
74 * a BRANCH on both ends of it is connecting two alternatives. (Here we
75 * have one of the subtle syntax dependencies: an individual BRANCH (as
76 * opposed to a collection of them) is never concatenated with anything
77 * because of operator precedence.) The operand of some types of node is
78 * a literal string; for others, it is a node leading into a sub-FSM. In
79 * particular, the operand of a BRANCH node is the first node of the branch.
80 * (NB this is *not* a tree structure: the tail of the branch connects
81 * to the thing following the set of BRANCHes.) The opcodes are defined
82 * in regnodes.h which is generated from regcomp.sym by regcomp.pl.
86 * A node is one char of opcode followed by two chars of "next" pointer.
87 * "Next" pointers are stored as two 8-bit pieces, high order first. The
88 * value is a positive offset from the opcode of the node containing it.
89 * An operand, if any, simply follows the node. (Note that much of the
90 * code generation knows about this implicit relationship.)
92 * Using two bytes for the "next" pointer is vast overkill for most things,
93 * but allows patterns to get big without disasters.
95 * [The "next" pointer is always aligned on an even
96 * boundary, and reads the offset directly as a short. Also, there is no
97 * special test to reverse the sign of BACK pointers since the offset is
101 /* This is the stuff that used to live in regexp.h that was truly
102 private to the engine itself. It now lives here. */
104 /* swap buffer for paren structs */
105 typedef struct regexp_paren_ofs {
110 typedef struct regexp_internal {
111 int name_list_idx; /* Optional data index of an array of paren names */
113 U32 *offsets; /* offset annotations 20001228 MJD
114 data about mapping the program to the
116 offsets[0] is proglen when this is used
121 regexp_paren_ofs *swap; /* Swap copy of *startp / *endp */
122 regnode *regstclass; /* Optional startclass as identified or constructed
124 struct reg_data *data; /* Additional miscellaneous data used by the program.
125 Used to make it easier to clone and free arbitrary
126 data that the regops need. Often the ARG field of
127 a regop is an index into this structure */
128 regnode program[1]; /* Unwarranted chumminess with compiler. */
131 #define RXi_SET(x,y) (x)->pprivate = (void*)(y)
132 #define RXi_GET(x) ((regexp_internal *)((x)->pprivate))
133 #define RXi_GET_DECL(r,ri) regexp_internal *ri = RXi_GET(r)
135 * Flags stored in regexp->intflags
136 * These are used only internally to the regexp engine
138 * See regexp.h for flags used externally to the regexp engine
140 #define PREGf_SKIP 0x00000001
141 #define PREGf_IMPLICIT 0x00000002 /* Converted .* to ^.* */
142 #define PREGf_NAUGHTY 0x00000004 /* how exponential is this pattern? */
143 #define PREGf_VERBARG_SEEN 0x00000008
144 #define PREGf_CUTGROUP_SEEN 0x00000010
147 /* this is where the old regcomp.h started */
149 struct regnode_string {
156 /* Argument bearing node - workhorse,
157 arg1 is often for the data field */
165 /* Similar to a regnode_1 but with an extra signed argument */
174 /* 'Two field' -- Two 16 bit unsigned args */
184 #define ANYOF_BITMAP_SIZE 32 /* 256 b/(8 b/B) */
185 #define ANYOF_CLASSBITMAP_SIZE 4 /* up to 32 (8*4) named classes */
187 /* also used by trie */
188 struct regnode_charclass {
193 char bitmap[ANYOF_BITMAP_SIZE]; /* only compile-time */
196 struct regnode_charclass_class { /* has [[:blah:]] classes */
197 U8 flags; /* should have ANYOF_CLASS here */
201 char bitmap[ANYOF_BITMAP_SIZE]; /* both compile-time */
202 char classflags[ANYOF_CLASSBITMAP_SIZE]; /* and run-time */
205 /* XXX fix this description.
206 Impose a limit of REG_INFTY on various pattern matching operations
207 to limit stack growth and to avoid "infinite" recursions.
209 /* The default size for REG_INFTY is I16_MAX, which is the same as
210 SHORT_MAX (see perl.h). Unfortunately I16 isn't necessarily 16 bits
211 (see handy.h). On the Cray C90, sizeof(short)==4 and hence I16_MAX is
212 ((1<<31)-1), while on the Cray T90, sizeof(short)==8 and I16_MAX is
213 ((1<<63)-1). To limit stack growth to reasonable sizes, supply a
215 --Andy Dougherty 11 June 1998
219 # define REG_INFTY ((1<<15)-1)
224 # define REG_INFTY I16_MAX
227 #define ARG_VALUE(arg) (arg)
228 #define ARG__SET(arg,val) ((arg) = (val))
234 #define ARG(p) ARG_VALUE(ARG_LOC(p))
235 #define ARG1(p) ARG_VALUE(ARG1_LOC(p))
236 #define ARG2(p) ARG_VALUE(ARG2_LOC(p))
237 #define ARG2L(p) ARG_VALUE(ARG2L_LOC(p))
239 #define ARG_SET(p, val) ARG__SET(ARG_LOC(p), (val))
240 #define ARG1_SET(p, val) ARG__SET(ARG1_LOC(p), (val))
241 #define ARG2_SET(p, val) ARG__SET(ARG2_LOC(p), (val))
242 #define ARG2L_SET(p, val) ARG__SET(ARG2L_LOC(p), (val))
247 #define NEXT_OFF(p) ((p)->next_off)
248 #define NODE_ALIGN(node)
249 #define NODE_ALIGN_FILL(node) ((node)->flags = 0xde) /* deadbeef */
251 #define SIZE_ALIGN NODE_ALIGN
258 #define OP(p) ((p)->type)
259 #define OPERAND(p) (((struct regnode_string *)p)->string)
260 #define MASK(p) ((char*)OPERAND(p))
261 #define STR_LEN(p) (((struct regnode_string *)p)->str_len)
262 #define STRING(p) (((struct regnode_string *)p)->string)
263 #define STR_SZ(l) ((l + sizeof(regnode) - 1) / sizeof(regnode))
264 #define NODE_SZ_STR(p) (STR_SZ(STR_LEN(p))+1)
271 #define NODE_ALIGN(node)
272 #define ARG_LOC(p) (((struct regnode_1 *)p)->arg1)
273 #define ARG1_LOC(p) (((struct regnode_2 *)p)->arg1)
274 #define ARG2_LOC(p) (((struct regnode_2 *)p)->arg2)
275 #define ARG2L_LOC(p) (((struct regnode_2L *)p)->arg2)
277 #define NODE_STEP_REGNODE 1 /* sizeof(regnode)/sizeof(regnode) */
278 #define EXTRA_STEP_2ARGS EXTRA_SIZE(struct regnode_2)
280 #define NODE_STEP_B 4
282 #define NEXTOPER(p) ((p) + NODE_STEP_REGNODE)
283 #define PREVOPER(p) ((p) - NODE_STEP_REGNODE)
285 #define FILL_ADVANCE_NODE(ptr, op) STMT_START { \
286 (ptr)->type = op; (ptr)->next_off = 0; (ptr)++; } STMT_END
287 #define FILL_ADVANCE_NODE_ARG(ptr, op, arg) STMT_START { \
288 ARG_SET(ptr, arg); FILL_ADVANCE_NODE(ptr, op); (ptr) += 1; } STMT_END
290 #define REG_MAGIC 0234
292 #define SIZE_ONLY (RExC_emit == &PL_regdummy)
294 /* Flags for node->flags of ANYOF */
296 #define ANYOF_CLASS 0x08 /* has [[:blah:]] classes */
297 #define ANYOF_INVERT 0x04
298 #define ANYOF_FOLD 0x02
299 #define ANYOF_LOCALE 0x01
301 /* Used for regstclass only */
302 #define ANYOF_EOS 0x10 /* Can match an empty string too */
304 /* There is a character or a range past 0xff */
305 #define ANYOF_UNICODE 0x20
306 #define ANYOF_UNICODE_ALL 0x40 /* Can match any char past 0xff */
308 /* size of node is large (includes class pointer) */
309 #define ANYOF_LARGE 0x80
311 /* Are there any runtime flags on in this node? */
312 #define ANYOF_RUNTIME(s) (ANYOF_FLAGS(s) & 0x0f)
314 #define ANYOF_FLAGS_ALL 0xff
316 /* Character classes for node->classflags of ANYOF */
317 /* Should be synchronized with a table in regprop() */
318 /* 2n should pair with 2n+1 */
320 #define ANYOF_ALNUM 0 /* \w, PL_utf8_alnum, utf8::IsWord, ALNUM */
321 #define ANYOF_NALNUM 1
322 #define ANYOF_SPACE 2 /* \s */
323 #define ANYOF_NSPACE 3
324 #define ANYOF_DIGIT 4
325 #define ANYOF_NDIGIT 5
326 #define ANYOF_ALNUMC 6 /* isalnum(3), utf8::IsAlnum, ALNUMC */
327 #define ANYOF_NALNUMC 7
328 #define ANYOF_ALPHA 8
329 #define ANYOF_NALPHA 9
330 #define ANYOF_ASCII 10
331 #define ANYOF_NASCII 11
332 #define ANYOF_CNTRL 12
333 #define ANYOF_NCNTRL 13
334 #define ANYOF_GRAPH 14
335 #define ANYOF_NGRAPH 15
336 #define ANYOF_LOWER 16
337 #define ANYOF_NLOWER 17
338 #define ANYOF_PRINT 18
339 #define ANYOF_NPRINT 19
340 #define ANYOF_PUNCT 20
341 #define ANYOF_NPUNCT 21
342 #define ANYOF_UPPER 22
343 #define ANYOF_NUPPER 23
344 #define ANYOF_XDIGIT 24
345 #define ANYOF_NXDIGIT 25
346 #define ANYOF_PSXSPC 26 /* POSIX space: \s plus the vertical tab */
347 #define ANYOF_NPSXSPC 27
348 #define ANYOF_BLANK 28 /* GNU extension: space and tab: non-vertical space */
349 #define ANYOF_NBLANK 29
353 /* Backward source code compatibility. */
355 #define ANYOF_ALNUML ANYOF_ALNUM
356 #define ANYOF_NALNUML ANYOF_NALNUM
357 #define ANYOF_SPACEL ANYOF_SPACE
358 #define ANYOF_NSPACEL ANYOF_NSPACE
360 /* Utility macros for the bitmap and classes of ANYOF */
362 #define ANYOF_SIZE (sizeof(struct regnode_charclass))
363 #define ANYOF_CLASS_SIZE (sizeof(struct regnode_charclass_class))
365 #define ANYOF_FLAGS(p) ((p)->flags)
367 #define ANYOF_BIT(c) (1 << ((c) & 7))
369 #define ANYOF_CLASS_BYTE(p, c) (((struct regnode_charclass_class*)(p))->classflags[((c) >> 3) & 3])
370 #define ANYOF_CLASS_SET(p, c) (ANYOF_CLASS_BYTE(p, c) |= ANYOF_BIT(c))
371 #define ANYOF_CLASS_CLEAR(p, c) (ANYOF_CLASS_BYTE(p, c) &= ~ANYOF_BIT(c))
372 #define ANYOF_CLASS_TEST(p, c) (ANYOF_CLASS_BYTE(p, c) & ANYOF_BIT(c))
374 #define ANYOF_CLASS_ZERO(ret) Zero(((struct regnode_charclass_class*)(ret))->classflags, ANYOF_CLASSBITMAP_SIZE, char)
375 #define ANYOF_BITMAP_ZERO(ret) Zero(((struct regnode_charclass*)(ret))->bitmap, ANYOF_BITMAP_SIZE, char)
377 #define ANYOF_BITMAP(p) (((struct regnode_charclass*)(p))->bitmap)
378 #define ANYOF_BITMAP_BYTE(p, c) (ANYOF_BITMAP(p)[(((U8)(c)) >> 3) & 31])
379 #define ANYOF_BITMAP_SET(p, c) (ANYOF_BITMAP_BYTE(p, c) |= ANYOF_BIT(c))
380 #define ANYOF_BITMAP_CLEAR(p,c) (ANYOF_BITMAP_BYTE(p, c) &= ~ANYOF_BIT(c))
381 #define ANYOF_BITMAP_TEST(p, c) (ANYOF_BITMAP_BYTE(p, c) & ANYOF_BIT(c))
383 #define ANYOF_BITMAP_SETALL(p) \
384 memset (ANYOF_BITMAP(p), 255, ANYOF_BITMAP_SIZE)
385 #define ANYOF_BITMAP_CLEARALL(p) \
386 Zero (ANYOF_BITMAP(p), ANYOF_BITMAP_SIZE)
387 /* Check that all 256 bits are all set. Used in S_cl_is_anything() */
388 #define ANYOF_BITMAP_TESTALLSET(p) \
389 memEQ (ANYOF_BITMAP(p), "\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377", ANYOF_BITMAP_SIZE)
391 #define ANYOF_SKIP ((ANYOF_SIZE - 1)/sizeof(regnode))
392 #define ANYOF_CLASS_SKIP ((ANYOF_CLASS_SIZE - 1)/sizeof(regnode))
393 #define ANYOF_CLASS_ADD_SKIP (ANYOF_CLASS_SKIP - ANYOF_SKIP)
397 * Utility definitions.
400 # define UCHARAT(p) ((int)*(const U8*)(p))
402 # define UCHARAT(p) ((int)*(p)&CHARMASK)
405 #define EXTRA_SIZE(guy) ((sizeof(guy)-1)/sizeof(struct regnode))
407 #define REG_SEEN_ZERO_LEN 0x00000001
408 #define REG_SEEN_LOOKBEHIND 0x00000002
409 #define REG_SEEN_GPOS 0x00000004
410 #define REG_SEEN_EVAL 0x00000008
411 #define REG_SEEN_CANY 0x00000010
412 #define REG_SEEN_SANY REG_SEEN_CANY /* src bckwrd cmpt */
413 #define REG_SEEN_RECURSE 0x00000020
414 #define REG_TOP_LEVEL_BRANCHES 0x00000040
415 #define REG_SEEN_VERBARG 0x00000080
416 #define REG_SEEN_CUTGROUP 0x00000100
417 #define REG_SEEN_RUN_ON_COMMENT 0x00000200
421 #ifdef PLUGGABLE_RE_EXTENSION
422 #include "re_nodes.h"
424 #include "regnodes.h"
427 /* The following have no fixed length. U8 so we can do strchr() on it. */
429 EXTCONST U8 PL_varies[];
431 EXTCONST U8 PL_varies[] = {
432 BRANCH, BACK, STAR, PLUS, CURLY, CURLYX, REF, REFF, REFFL,
433 WHILEM, CURLYM, CURLYN, BRANCHJ, IFTHEN, SUSPEND, CLUMP,
439 /* The following always have a length of 1. U8 we can do strchr() on it. */
440 /* (Note that length 1 means "one character" under UTF8, not "one octet".) */
442 EXTCONST U8 PL_simple[];
444 EXTCONST U8 PL_simple[] = {
456 #ifndef PLUGGABLE_RE_EXTENSION
458 EXTCONST regexp_engine PL_core_reg_engine;
460 EXTCONST regexp_engine PL_core_reg_engine = {
463 Perl_re_intuit_start,
464 Perl_re_intuit_string,
465 Perl_regfree_internal,
466 Perl_reg_numbered_buff_get,
467 Perl_reg_named_buff_get,
468 #if defined(USE_ITHREADS)
469 Perl_regdupe_internal
473 #endif /* PLUGGABLE_RE_EXTENSION */
479 /* .what is a character array with one character for each member of .data
480 * The character describes the function of the corresponding .data item:
481 * f - start-class data for regstclass optimization
482 * n - Root of op tree for (?{EVAL}) item
483 * o - Start op for (?{EVAL}) item
484 * p - Pad for (?{EVAL}) item
485 * s - swash for unicode-style character class, and the multicharacter
486 * strings resulting from casefolding the single-character entries
487 * in the character class
489 * u - trie struct's widecharmap (a HV, so can't share, must dup)
490 * also used for revcharmap and words under DEBUGGING
491 * T - aho-trie struct
492 * S - sv for named capture lookup
493 * 20010712 mjd@plover.com
494 * (Remember to update re_dup() and pregfree() if you add any items.)
502 /* Code in S_to_utf8_substr() and S_to_byte_substr() in regexec.c accesses
503 anchored* and float* via array indexes 0 and 1. */
504 #define anchored_substr substrs->data[0].substr
505 #define anchored_utf8 substrs->data[0].utf8_substr
506 #define anchored_offset substrs->data[0].min_offset
507 #define anchored_end_shift substrs->data[0].end_shift
509 #define float_substr substrs->data[1].substr
510 #define float_utf8 substrs->data[1].utf8_substr
511 #define float_min_offset substrs->data[1].min_offset
512 #define float_max_offset substrs->data[1].max_offset
513 #define float_end_shift substrs->data[1].end_shift
515 #define check_substr substrs->data[2].substr
516 #define check_utf8 substrs->data[2].utf8_substr
517 #define check_offset_min substrs->data[2].min_offset
518 #define check_offset_max substrs->data[2].max_offset
519 #define check_end_shift substrs->data[2].end_shift
523 /* trie related stuff */
525 /* a transition record for the state machine. the
526 check field determines which state "owns" the
527 transition. the char the transition is for is
528 determined by offset from the owning states base
529 field. the next field determines which state
530 is to be transitioned to if any.
532 struct _reg_trie_trans {
537 /* a transition list element for the list based representation */
538 struct _reg_trie_trans_list_elem {
542 typedef struct _reg_trie_trans_list_elem reg_trie_trans_le;
544 /* a state for compressed nodes. base is an offset
545 into an array of reg_trie_trans array. If wordnum is
546 nonzero the state is accepting. if base is zero then
547 the state has no children (and will be accepting)
549 struct _reg_trie_state {
553 reg_trie_trans_le* list;
559 typedef struct _reg_trie_state reg_trie_state;
560 typedef struct _reg_trie_trans reg_trie_trans;
563 /* anything in here that needs to be freed later
564 should be dealt with in pregfree.
565 refcount is first in both this and _reg_ac_data to allow a space
566 optimisation in Perl_regdupe. */
567 struct _reg_trie_data {
568 U32 refcount; /* number of times this trie is referenced */
569 U16 uniquecharcount; /* unique chars in trie (width of trans table) */
570 U32 lasttrans; /* last valid transition element */
571 U16 *charmap; /* byte to charid lookup array */
572 reg_trie_state *states; /* state data */
573 reg_trie_trans *trans; /* array of transition elements */
574 char *bitmap; /* stclass bitmap */
575 U32 startstate; /* initial state - used for common prefix optimisation */
576 STRLEN minlen; /* minimum length of words in trie - build/opt only? */
577 STRLEN maxlen; /* maximum length of words in trie - build/opt only? */
578 U32 *wordlen; /* array of lengths of words */
579 U16 *jump; /* optional 1 indexed array of offsets before tail
580 for the node following a given word. */
581 U16 *nextword; /* optional 1 indexed array to support linked list
582 of duplicate wordnums */
583 U32 statecount; /* Build only - number of states in the states array
584 (including the unused zero state) */
585 U32 wordcount; /* Build only */
587 STRLEN charcount; /* Build only */
590 /* There is one (3 under DEBUGGING) pointers that logically belong in this
591 structure, but are held outside as they need duplication on thread cloning,
592 whereas the rest of the structure can be read only:
593 HV *widecharmap; code points > 255 to charid
595 AV *words; Array of words contained in trie, for dumping
596 AV *revcharmap; Map of each charid back to its character representation
600 #define TRIE_WORDS_OFFSET 2
602 typedef struct _reg_trie_data reg_trie_data;
604 /* refcount is first in both this and _reg_trie_data to allow a space
605 optimisation in Perl_regdupe. */
606 struct _reg_ac_data {
609 reg_trie_state *states;
612 typedef struct _reg_ac_data reg_ac_data;
614 /* ANY_BIT doesnt use the structure, so we can borrow it here.
615 This is simpler than refactoring all of it as wed end up with
616 three different sets... */
618 #define TRIE_BITMAP(p) (((reg_trie_data *)(p))->bitmap)
619 #define TRIE_BITMAP_BYTE(p, c) (TRIE_BITMAP(p)[(((U8)(c)) >> 3) & 31])
620 #define TRIE_BITMAP_SET(p, c) (TRIE_BITMAP_BYTE(p, c) |= ANYOF_BIT((U8)c))
621 #define TRIE_BITMAP_CLEAR(p,c) (TRIE_BITMAP_BYTE(p, c) &= ~ANYOF_BIT((U8)c))
622 #define TRIE_BITMAP_TEST(p, c) (TRIE_BITMAP_BYTE(p, c) & ANYOF_BIT((U8)c))
624 #define IS_ANYOF_TRIE(op) ((op)==TRIEC || (op)==AHOCORASICKC)
625 #define IS_TRIE_AC(op) ((op)>=AHOCORASICK)
628 #define BITMAP_BYTE(p, c) (((U8*)p)[(((U8)(c)) >> 3) & 31])
629 #define BITMAP_TEST(p, c) (BITMAP_BYTE(p, c) & ANYOF_BIT((U8)c))
631 /* these defines assume uniquecharcount is the correct variable, and state may be evaluated twice */
632 #define TRIE_NODENUM(state) (((state)-1)/(trie->uniquecharcount)+1)
633 #define SAFE_TRIE_NODENUM(state) ((state) ? (((state)-1)/(trie->uniquecharcount)+1) : (state))
634 #define TRIE_NODEIDX(state) ((state) ? (((state)-1)*(trie->uniquecharcount)+1) : (state))
637 #define TRIE_CHARCOUNT(trie) ((trie)->charcount)
639 #define TRIE_CHARCOUNT(trie) (trie_charcount)
642 #define RE_TRIE_MAXBUF_INIT 65536
643 #define RE_TRIE_MAXBUF_NAME "\022E_TRIE_MAXBUF"
644 #define RE_DEBUG_FLAGS "\022E_DEBUG_FLAGS"
648 RE_DEBUG_FLAGS is used to control what debug output is emitted
649 its divided into three groups of options, some of which interact.
650 The three groups are: Compile, Execute, Extra. There is room for a
651 further group, as currently only the low three bytes are used.
672 If you modify any of these make sure you make corresponding changes to
673 re.pm, especially to the documentation.
679 #define RE_DEBUG_COMPILE_MASK 0x0000FF
680 #define RE_DEBUG_COMPILE_PARSE 0x000001
681 #define RE_DEBUG_COMPILE_OPTIMISE 0x000002
682 #define RE_DEBUG_COMPILE_TRIE 0x000004
683 #define RE_DEBUG_COMPILE_DUMP 0x000008
686 #define RE_DEBUG_EXECUTE_MASK 0x00FF00
687 #define RE_DEBUG_EXECUTE_INTUIT 0x000100
688 #define RE_DEBUG_EXECUTE_MATCH 0x000200
689 #define RE_DEBUG_EXECUTE_TRIE 0x000400
692 #define RE_DEBUG_EXTRA_MASK 0xFF0000
693 #define RE_DEBUG_EXTRA_TRIE 0x010000
694 #define RE_DEBUG_EXTRA_OFFSETS 0x020000
695 #define RE_DEBUG_EXTRA_OFFDEBUG 0x040000
696 #define RE_DEBUG_EXTRA_STATE 0x080000
697 #define RE_DEBUG_EXTRA_OPTIMISE 0x100000
699 #define RE_DEBUG_EXTRA_STACK 0x280000
701 #define RE_DEBUG_FLAG(x) (re_debug_flags & x)
703 #define DEBUG_COMPILE_r(x) DEBUG_r( \
704 if (re_debug_flags & RE_DEBUG_COMPILE_MASK) x )
705 #define DEBUG_PARSE_r(x) DEBUG_r( \
706 if (re_debug_flags & RE_DEBUG_COMPILE_PARSE) x )
707 #define DEBUG_OPTIMISE_r(x) DEBUG_r( \
708 if (re_debug_flags & RE_DEBUG_COMPILE_OPTIMISE) x )
709 #define DEBUG_PARSE_r(x) DEBUG_r( \
710 if (re_debug_flags & RE_DEBUG_COMPILE_PARSE) x )
711 #define DEBUG_DUMP_r(x) DEBUG_r( \
712 if (re_debug_flags & RE_DEBUG_COMPILE_DUMP) x )
713 #define DEBUG_TRIE_COMPILE_r(x) DEBUG_r( \
714 if (re_debug_flags & RE_DEBUG_COMPILE_TRIE) x )
717 #define DEBUG_EXECUTE_r(x) DEBUG_r( \
718 if (re_debug_flags & RE_DEBUG_EXECUTE_MASK) x )
719 #define DEBUG_INTUIT_r(x) DEBUG_r( \
720 if (re_debug_flags & RE_DEBUG_EXECUTE_INTUIT) x )
721 #define DEBUG_MATCH_r(x) DEBUG_r( \
722 if (re_debug_flags & RE_DEBUG_EXECUTE_MATCH) x )
723 #define DEBUG_TRIE_EXECUTE_r(x) DEBUG_r( \
724 if (re_debug_flags & RE_DEBUG_EXECUTE_TRIE) x )
727 #define DEBUG_EXTRA_r(x) DEBUG_r( \
728 if (re_debug_flags & RE_DEBUG_EXTRA_MASK) x )
729 #define DEBUG_OFFSETS_r(x) DEBUG_r( \
730 if (re_debug_flags & RE_DEBUG_EXTRA_OFFSETS) x )
731 #define DEBUG_STATE_r(x) DEBUG_r( \
732 if (re_debug_flags & RE_DEBUG_EXTRA_STATE) x )
733 #define DEBUG_STACK_r(x) DEBUG_r( \
734 if (re_debug_flags & RE_DEBUG_EXTRA_STACK) x )
735 #define DEBUG_OPTIMISE_MORE_r(x) DEBUG_r( \
736 if ((RE_DEBUG_EXTRA_OPTIMISE|RE_DEBUG_COMPILE_OPTIMISE) == \
737 (re_debug_flags & (RE_DEBUG_EXTRA_OPTIMISE|RE_DEBUG_COMPILE_OPTIMISE)) ) x )
738 #define MJD_OFFSET_DEBUG(x) DEBUG_r( \
739 if (re_debug_flags & RE_DEBUG_EXTRA_OFFDEBUG) \
740 Perl_warn_nocontext x )
741 #define DEBUG_TRIE_COMPILE_MORE_r(x) DEBUG_TRIE_COMPILE_r( \
742 if (re_debug_flags & RE_DEBUG_EXTRA_TRIE) x )
743 #define DEBUG_TRIE_EXECUTE_MORE_r(x) DEBUG_TRIE_EXECUTE_r( \
744 if (re_debug_flags & RE_DEBUG_EXTRA_TRIE) x )
746 #define DEBUG_TRIE_r(x) DEBUG_r( \
747 if (re_debug_flags & (RE_DEBUG_COMPILE_TRIE \
748 | RE_DEBUG_EXECUTE_TRIE )) x )
751 /* get_sv() can return NULL during global destruction. */
752 #define GET_RE_DEBUG_FLAGS DEBUG_r({ \
753 SV * re_debug_flags_sv = NULL; \
754 re_debug_flags_sv = get_sv(RE_DEBUG_FLAGS, 1); \
755 if (re_debug_flags_sv) { \
756 if (!SvIOK(re_debug_flags_sv)) \
757 sv_setuv(re_debug_flags_sv, RE_DEBUG_COMPILE_DUMP | RE_DEBUG_EXECUTE_MASK ); \
758 re_debug_flags=SvIV(re_debug_flags_sv); \
764 #define GET_RE_DEBUG_FLAGS_DECL IV re_debug_flags = 0; GET_RE_DEBUG_FLAGS;
766 #define RE_PV_COLOR_DECL(rpv,rlen,isuni,dsv,pv,l,m,c1,c2) \
767 const char * const rpv = \
768 pv_pretty((dsv), (pv), (l), (m), \
769 PL_colors[(c1)],PL_colors[(c2)], \
770 PERL_PV_ESCAPE_RE |((isuni) ? PERL_PV_ESCAPE_UNI : 0) ); \
771 const int rlen = SvCUR(dsv)
773 #define RE_SV_ESCAPE(rpv,isuni,dsv,sv,m) \
774 const char * const rpv = \
775 pv_pretty((dsv), (SvPV_nolen_const(sv)), (SvCUR(sv)), (m), \
776 PL_colors[(c1)],PL_colors[(c2)], \
777 PERL_PV_ESCAPE_RE |((isuni) ? PERL_PV_ESCAPE_UNI : 0) )
779 #define RE_PV_QUOTED_DECL(rpv,isuni,dsv,pv,l,m) \
780 const char * const rpv = \
781 pv_pretty((dsv), (pv), (l), (m), \
782 PL_colors[0], PL_colors[1], \
783 ( PERL_PV_PRETTY_QUOTE | PERL_PV_ESCAPE_RE | PERL_PV_PRETTY_ELIPSES | \
784 ((isuni) ? PERL_PV_ESCAPE_UNI : 0)) \
787 #define RE_SV_DUMPLEN(ItEm) (SvCUR(ItEm) - (SvTAIL(ItEm)!=0))
788 #define RE_SV_TAIL(ItEm) (SvTAIL(ItEm) ? "$" : "")
790 #else /* if not DEBUGGING */
792 #define GET_RE_DEBUG_FLAGS_DECL
793 #define RE_PV_COLOR_DECL(rpv,rlen,isuni,dsv,pv,l,m,c1,c2)
794 #define RE_SV_ESCAPE(rpv,isuni,dsv,sv,m)
795 #define RE_PV_QUOTED_DECL(rpv,isuni,dsv,pv,l,m)
796 #define RE_SV_DUMPLEN(ItEm)
797 #define RE_SV_TAIL(ItEm)
799 #endif /* DEBUG RELATED DEFINES */