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- /* regcomp.h
- *
- * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- * 2000, 2001, 2002, 2003, 2005, 2006, 2007, by Larry Wall and others
- *
- * You may distribute under the terms of either the GNU General Public
- * License or the Artistic License, as specified in the README file.
- *
- */
- #include "regcharclass.h"
-
- typedef OP OP_4tree; /* Will be redefined later. */
-
-
- /* Convert branch sequences to more efficient trie ops? */
- #define PERL_ENABLE_TRIE_OPTIMISATION 1
-
- /* Be really agressive about optimising patterns with trie sequences? */
- #define PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION 1
-
- /* Should the optimiser take positive assertions into account? */
- #define PERL_ENABLE_POSITIVE_ASSERTION_STUDY 0
-
- /* Not for production use: */
- #define PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS 0
-
- /* Activate offsets code - set to if 1 to enable */
- #ifdef DEBUGGING
- #define RE_TRACK_PATTERN_OFFSETS
- #endif
-
- /* Unless the next line is uncommented it is illegal to combine lazy
- matching with possessive matching. Frankly it doesn't make much sense
- to allow it as X*?+ matches nothing, X+?+ matches a single char only,
- and X{min,max}?+ matches min times only.
- */
- /* #define REG_ALLOW_MINMOD_SUSPEND */
-
- /*
- * The "internal use only" fields in regexp.h are present to pass info from
- * compile to execute that permits the execute phase to run lots faster on
- * simple cases. They are:
- *
- * regstart sv that must begin a match; NULL if none obvious
- * reganch is the match anchored (at beginning-of-line only)?
- * regmust string (pointer into program) that match must include, or NULL
- * [regmust changed to SV* for bminstr()--law]
- * regmlen length of regmust string
- * [regmlen not used currently]
- *
- * Regstart and reganch permit very fast decisions on suitable starting points
- * for a match, cutting down the work a lot. Regmust permits fast rejection
- * of lines that cannot possibly match. The regmust tests are costly enough
- * that pregcomp() supplies a regmust only if the r.e. contains something
- * potentially expensive (at present, the only such thing detected is * or +
- * at the start of the r.e., which can involve a lot of backup). Regmlen is
- * supplied because the test in pregexec() needs it and pregcomp() is computing
- * it anyway.
- * [regmust is now supplied always. The tests that use regmust have a
- * heuristic that disables the test if it usually matches.]
- *
- * [In fact, we now use regmust in many cases to locate where the search
- * starts in the string, so if regback is >= 0, the regmust search is never
- * wasted effort. The regback variable says how many characters back from
- * where regmust matched is the earliest possible start of the match.
- * For instance, /[a-z].foo/ has a regmust of 'foo' and a regback of 2.]
- */
-
- /*
- * Structure for regexp "program". This is essentially a linear encoding
- * of a nondeterministic finite-state machine (aka syntax charts or
- * "railroad normal form" in parsing technology). Each node is an opcode
- * plus a "next" pointer, possibly plus an operand. "Next" pointers of
- * all nodes except BRANCH implement concatenation; a "next" pointer with
- * a BRANCH on both ends of it is connecting two alternatives. (Here we
- * have one of the subtle syntax dependencies: an individual BRANCH (as
- * opposed to a collection of them) is never concatenated with anything
- * because of operator precedence.) The operand of some types of node is
- * a literal string; for others, it is a node leading into a sub-FSM. In
- * particular, the operand of a BRANCH node is the first node of the branch.
- * (NB this is *not* a tree structure: the tail of the branch connects
- * to the thing following the set of BRANCHes.) The opcodes are defined
- * in regnodes.h which is generated from regcomp.sym by regcomp.pl.
- */
-
- /*
- * A node is one char of opcode followed by two chars of "next" pointer.
- * "Next" pointers are stored as two 8-bit pieces, high order first. The
- * value is a positive offset from the opcode of the node containing it.
- * An operand, if any, simply follows the node. (Note that much of the
- * code generation knows about this implicit relationship.)
- *
- * Using two bytes for the "next" pointer is vast overkill for most things,
- * but allows patterns to get big without disasters.
- *
- * [The "next" pointer is always aligned on an even
- * boundary, and reads the offset directly as a short. Also, there is no
- * special test to reverse the sign of BACK pointers since the offset is
- * stored negative.]
- */
-
- /* This is the stuff that used to live in regexp.h that was truly
- private to the engine itself. It now lives here. */
-
-
-
- typedef struct regexp_internal {
- int name_list_idx; /* Optional data index of an array of paren names */
- union {
- U32 *offsets; /* offset annotations 20001228 MJD
- data about mapping the program to the
- string -
- offsets[0] is proglen when this is used
- */
- U32 proglen;
- } u;
-
- regnode *regstclass; /* Optional startclass as identified or constructed
- by the optimiser */
- struct reg_data *data; /* Additional miscellaneous data used by the program.
- Used to make it easier to clone and free arbitrary
- data that the regops need. Often the ARG field of
- a regop is an index into this structure */
- regnode program[1]; /* Unwarranted chumminess with compiler. */
- } regexp_internal;
-
- #define RXi_SET(x,y) (x)->pprivate = (void*)(y)
- #define RXi_GET(x) ((regexp_internal *)((x)->pprivate))
- #define RXi_GET_DECL(r,ri) regexp_internal *ri = RXi_GET(r)
- /*
- * Flags stored in regexp->intflags
- * These are used only internally to the regexp engine
- *
- * See regexp.h for flags used externally to the regexp engine
- */
- #define PREGf_SKIP 0x00000001
- #define PREGf_IMPLICIT 0x00000002 /* Converted .* to ^.* */
- #define PREGf_NAUGHTY 0x00000004 /* how exponential is this pattern? */
- #define PREGf_VERBARG_SEEN 0x00000008
- #define PREGf_CUTGROUP_SEEN 0x00000010
-
-
- /* this is where the old regcomp.h started */
-
- struct regnode_string {
- U8 str_len;
- U8 type;
- U16 next_off;
- char string[1];
- };
-
- /* Argument bearing node - workhorse,
- arg1 is often for the data field */
- struct regnode_1 {
- U8 flags;
- U8 type;
- U16 next_off;
- U32 arg1;
- };
-
- /* Similar to a regnode_1 but with an extra signed argument */
- struct regnode_2L {
- U8 flags;
- U8 type;
- U16 next_off;
- U32 arg1;
- I32 arg2;
- };
-
- /* 'Two field' -- Two 16 bit unsigned args */
- struct regnode_2 {
- U8 flags;
- U8 type;
- U16 next_off;
- U16 arg1;
- U16 arg2;
- };
-
-
- #define ANYOF_BITMAP_SIZE 32 /* 256 b/(8 b/B) */
- #define ANYOF_CLASSBITMAP_SIZE 4 /* up to 40 (8*5) named classes */
-
- /* also used by trie */
- struct regnode_charclass {
- U8 flags;
- U8 type;
- U16 next_off;
- U32 arg1;
- char bitmap[ANYOF_BITMAP_SIZE]; /* only compile-time */
- };
-
- struct regnode_charclass_class { /* has [[:blah:]] classes */
- U8 flags; /* should have ANYOF_CLASS here */
- U8 type;
- U16 next_off;
- U32 arg1;
- char bitmap[ANYOF_BITMAP_SIZE]; /* both compile-time */
- char classflags[ANYOF_CLASSBITMAP_SIZE]; /* and run-time */
- };
-
- /* XXX fix this description.
- Impose a limit of REG_INFTY on various pattern matching operations
- to limit stack growth and to avoid "infinite" recursions.
- */
- /* The default size for REG_INFTY is I16_MAX, which is the same as
- SHORT_MAX (see perl.h). Unfortunately I16 isn't necessarily 16 bits
- (see handy.h). On the Cray C90, sizeof(short)==4 and hence I16_MAX is
- ((1<<31)-1), while on the Cray T90, sizeof(short)==8 and I16_MAX is
- ((1<<63)-1). To limit stack growth to reasonable sizes, supply a
- smaller default.
- --Andy Dougherty 11 June 1998
- */
- #if SHORTSIZE > 2
- # ifndef REG_INFTY
- # define REG_INFTY ((1<<15)-1)
- # endif
- #endif
-
- #ifndef REG_INFTY
- # define REG_INFTY I16_MAX
- #endif
-
- #define ARG_VALUE(arg) (arg)
- #define ARG__SET(arg,val) ((arg) = (val))
-
- #undef ARG
- #undef ARG1
- #undef ARG2
-
- #define ARG(p) ARG_VALUE(ARG_LOC(p))
- #define ARG1(p) ARG_VALUE(ARG1_LOC(p))
- #define ARG2(p) ARG_VALUE(ARG2_LOC(p))
- #define ARG2L(p) ARG_VALUE(ARG2L_LOC(p))
-
- #define ARG_SET(p, val) ARG__SET(ARG_LOC(p), (val))
- #define ARG1_SET(p, val) ARG__SET(ARG1_LOC(p), (val))
- #define ARG2_SET(p, val) ARG__SET(ARG2_LOC(p), (val))
- #define ARG2L_SET(p, val) ARG__SET(ARG2L_LOC(p), (val))
-
- #undef NEXT_OFF
- #undef NODE_ALIGN
-
- #define NEXT_OFF(p) ((p)->next_off)
- #define NODE_ALIGN(node)
- #define NODE_ALIGN_FILL(node) ((node)->flags = 0xde) /* deadbeef */
-
- #define SIZE_ALIGN NODE_ALIGN
-
- #undef OP
- #undef OPERAND
- #undef MASK
- #undef STRING
-
- #define OP(p) ((p)->type)
- #define OPERAND(p) (((struct regnode_string *)p)->string)
- #define MASK(p) ((char*)OPERAND(p))
- #define STR_LEN(p) (((struct regnode_string *)p)->str_len)
- #define STRING(p) (((struct regnode_string *)p)->string)
- #define STR_SZ(l) ((l + sizeof(regnode) - 1) / sizeof(regnode))
- #define NODE_SZ_STR(p) (STR_SZ(STR_LEN(p))+1)
-
- #undef NODE_ALIGN
- #undef ARG_LOC
- #undef NEXTOPER
- #undef PREVOPER
-
- #define NODE_ALIGN(node)
- #define ARG_LOC(p) (((struct regnode_1 *)p)->arg1)
- #define ARG1_LOC(p) (((struct regnode_2 *)p)->arg1)
- #define ARG2_LOC(p) (((struct regnode_2 *)p)->arg2)
- #define ARG2L_LOC(p) (((struct regnode_2L *)p)->arg2)
-
- #define NODE_STEP_REGNODE 1 /* sizeof(regnode)/sizeof(regnode) */
- #define EXTRA_STEP_2ARGS EXTRA_SIZE(struct regnode_2)
-
- #define NODE_STEP_B 4
-
- #define NEXTOPER(p) ((p) + NODE_STEP_REGNODE)
- #define PREVOPER(p) ((p) - NODE_STEP_REGNODE)
-
- #define FILL_ADVANCE_NODE(ptr, op) STMT_START { \
- (ptr)->type = op; (ptr)->next_off = 0; (ptr)++; } STMT_END
- #define FILL_ADVANCE_NODE_ARG(ptr, op, arg) STMT_START { \
- ARG_SET(ptr, arg); FILL_ADVANCE_NODE(ptr, op); (ptr) += 1; } STMT_END
-
- #define REG_MAGIC 0234
-
- #define SIZE_ONLY (RExC_emit == &PL_regdummy)
-
- /* Flags for node->flags of ANYOF */
-
- #define ANYOF_CLASS 0x08 /* has [[:blah:]] classes */
- #define ANYOF_INVERT 0x04
- #define ANYOF_FOLD 0x02
- #define ANYOF_LOCALE 0x01
-
- /* Used for regstclass only */
- #define ANYOF_EOS 0x10 /* Can match an empty string too */
-
- /* There is a character or a range past 0xff */
- #define ANYOF_UNICODE 0x20
- #define ANYOF_UNICODE_ALL 0x40 /* Can match any char past 0xff */
-
- /* size of node is large (includes class pointer) */
- #define ANYOF_LARGE 0x80
-
- /* Are there any runtime flags on in this node? */
- #define ANYOF_RUNTIME(s) (ANYOF_FLAGS(s) & 0x0f)
-
- #define ANYOF_FLAGS_ALL 0xff
-
- /* Character classes for node->classflags of ANYOF */
- /* Should be synchronized with a table in regprop() */
- /* 2n should pair with 2n+1 */
-
- #define ANYOF_ALNUM 0 /* \w, PL_utf8_alnum, utf8::IsWord, ALNUM */
- #define ANYOF_NALNUM 1
- #define ANYOF_SPACE 2 /* \s */
- #define ANYOF_NSPACE 3
- #define ANYOF_DIGIT 4
- #define ANYOF_NDIGIT 5
- #define ANYOF_ALNUMC 6 /* isalnum(3), utf8::IsAlnum, ALNUMC */
- #define ANYOF_NALNUMC 7
- #define ANYOF_ALPHA 8
- #define ANYOF_NALPHA 9
- #define ANYOF_ASCII 10
- #define ANYOF_NASCII 11
- #define ANYOF_CNTRL 12
- #define ANYOF_NCNTRL 13
- #define ANYOF_GRAPH 14
- #define ANYOF_NGRAPH 15
- #define ANYOF_LOWER 16
- #define ANYOF_NLOWER 17
- #define ANYOF_PRINT 18
- #define ANYOF_NPRINT 19
- #define ANYOF_PUNCT 20
- #define ANYOF_NPUNCT 21
- #define ANYOF_UPPER 22
- #define ANYOF_NUPPER 23
- #define ANYOF_XDIGIT 24
- #define ANYOF_NXDIGIT 25
- #define ANYOF_PSXSPC 26 /* POSIX space: \s plus the vertical tab */
- #define ANYOF_NPSXSPC 27
- #define ANYOF_BLANK 28 /* GNU extension: space and tab: non-vertical space */
- #define ANYOF_NBLANK 29
-
- #define ANYOF_MAX 32
-
- /* pseudo classes, not stored in the class bitmap, but used as flags
- during compilation of char classes */
-
- #define ANYOF_VERTWS (ANYOF_MAX+1)
- #define ANYOF_NVERTWS (ANYOF_MAX+2)
- #define ANYOF_HORIZWS (ANYOF_MAX+3)
- #define ANYOF_NHORIZWS (ANYOF_MAX+4)
-
- /* Backward source code compatibility. */
-
- #define ANYOF_ALNUML ANYOF_ALNUM
- #define ANYOF_NALNUML ANYOF_NALNUM
- #define ANYOF_SPACEL ANYOF_SPACE
- #define ANYOF_NSPACEL ANYOF_NSPACE
-
- /* Utility macros for the bitmap and classes of ANYOF */
-
- #define ANYOF_SIZE (sizeof(struct regnode_charclass))
- #define ANYOF_CLASS_SIZE (sizeof(struct regnode_charclass_class))
-
- #define ANYOF_FLAGS(p) ((p)->flags)
-
- #define ANYOF_BIT(c) (1 << ((c) & 7))
-
- #define ANYOF_CLASS_BYTE(p, c) (((struct regnode_charclass_class*)(p))->classflags[((c) >> 3) & 3])
- #define ANYOF_CLASS_SET(p, c) (ANYOF_CLASS_BYTE(p, c) |= ANYOF_BIT(c))
- #define ANYOF_CLASS_CLEAR(p, c) (ANYOF_CLASS_BYTE(p, c) &= ~ANYOF_BIT(c))
- #define ANYOF_CLASS_TEST(p, c) (ANYOF_CLASS_BYTE(p, c) & ANYOF_BIT(c))
-
- #define ANYOF_CLASS_ZERO(ret) Zero(((struct regnode_charclass_class*)(ret))->classflags, ANYOF_CLASSBITMAP_SIZE, char)
- #define ANYOF_BITMAP_ZERO(ret) Zero(((struct regnode_charclass*)(ret))->bitmap, ANYOF_BITMAP_SIZE, char)
-
- #define ANYOF_BITMAP(p) (((struct regnode_charclass*)(p))->bitmap)
- #define ANYOF_BITMAP_BYTE(p, c) (ANYOF_BITMAP(p)[(((U8)(c)) >> 3) & 31])
- #define ANYOF_BITMAP_SET(p, c) (ANYOF_BITMAP_BYTE(p, c) |= ANYOF_BIT(c))
- #define ANYOF_BITMAP_CLEAR(p,c) (ANYOF_BITMAP_BYTE(p, c) &= ~ANYOF_BIT(c))
- #define ANYOF_BITMAP_TEST(p, c) (ANYOF_BITMAP_BYTE(p, c) & ANYOF_BIT(c))
-
- #define ANYOF_BITMAP_SETALL(p) \
- memset (ANYOF_BITMAP(p), 255, ANYOF_BITMAP_SIZE)
- #define ANYOF_BITMAP_CLEARALL(p) \
- Zero (ANYOF_BITMAP(p), ANYOF_BITMAP_SIZE)
- /* Check that all 256 bits are all set. Used in S_cl_is_anything() */
- #define ANYOF_BITMAP_TESTALLSET(p) \
- 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)
-
- #define ANYOF_SKIP ((ANYOF_SIZE - 1)/sizeof(regnode))
- #define ANYOF_CLASS_SKIP ((ANYOF_CLASS_SIZE - 1)/sizeof(regnode))
- #define ANYOF_CLASS_ADD_SKIP (ANYOF_CLASS_SKIP - ANYOF_SKIP)
-
-
- /*
- * Utility definitions.
- */
- #ifndef CHARMASK
- # define UCHARAT(p) ((int)*(const U8*)(p))
- #else
- # define UCHARAT(p) ((int)*(p)&CHARMASK)
- #endif
-
- #define EXTRA_SIZE(guy) ((sizeof(guy)-1)/sizeof(struct regnode))
-
- #define REG_SEEN_ZERO_LEN 0x00000001
- #define REG_SEEN_LOOKBEHIND 0x00000002
- #define REG_SEEN_GPOS 0x00000004
- #define REG_SEEN_EVAL 0x00000008
- #define REG_SEEN_CANY 0x00000010
- #define REG_SEEN_SANY REG_SEEN_CANY /* src bckwrd cmpt */
- #define REG_SEEN_RECURSE 0x00000020
- #define REG_TOP_LEVEL_BRANCHES 0x00000040
- #define REG_SEEN_VERBARG 0x00000080
- #define REG_SEEN_CUTGROUP 0x00000100
- #define REG_SEEN_RUN_ON_COMMENT 0x00000200
-
- START_EXTERN_C
-
- #ifdef PLUGGABLE_RE_EXTENSION
- #include "re_nodes.h"
- #else
- #include "regnodes.h"
- #endif
-
- /* The following have no fixed length. U8 so we can do strchr() on it. */
- #ifndef DOINIT
- EXTCONST U8 PL_varies[];
- #else
- EXTCONST U8 PL_varies[] = {
- BRANCH, BACK, STAR, PLUS, CURLY, CURLYX, REF, REFF, REFFL,
- WHILEM, CURLYM, CURLYN, BRANCHJ, IFTHEN, SUSPEND, CLUMP,
- NREF, NREFF, NREFFL,
- 0
- };
- #endif
-
- /* The following always have a length of 1. U8 we can do strchr() on it. */
- /* (Note that length 1 means "one character" under UTF8, not "one octet".) */
- #ifndef DOINIT
- EXTCONST U8 PL_simple[];
- #else
- EXTCONST U8 PL_simple[] = {
- REG_ANY, SANY, CANY,
- ANYOF,
- ALNUM, ALNUML,
- NALNUM, NALNUML,
- SPACE, SPACEL,
- NSPACE, NSPACEL,
- DIGIT, NDIGIT,
- VERTWS, NVERTWS,
- HORIZWS, NHORIZWS,
- 0
- };
- #endif
-
- #ifndef PLUGGABLE_RE_EXTENSION
- #ifndef DOINIT
- EXTCONST regexp_engine PL_core_reg_engine;
- #else /* DOINIT */
- EXTCONST regexp_engine PL_core_reg_engine = {
- Perl_re_compile,
- Perl_regexec_flags,
- Perl_re_intuit_start,
- Perl_re_intuit_string,
- Perl_regfree_internal,
- Perl_reg_numbered_buff_fetch,
- Perl_reg_numbered_buff_store,
- Perl_reg_numbered_buff_length,
- Perl_reg_named_buff,
- Perl_reg_named_buff_iter,
- Perl_reg_qr_package,
- #if defined(USE_ITHREADS)
- Perl_regdupe_internal
- #endif
- };
- #endif /* DOINIT */
- #endif /* PLUGGABLE_RE_EXTENSION */
-
-
- END_EXTERN_C
-
-
- /* .what is a character array with one character for each member of .data
- * The character describes the function of the corresponding .data item:
- * f - start-class data for regstclass optimization
- * n - Root of op tree for (?{EVAL}) item
- * o - Start op for (?{EVAL}) item
- * p - Pad for (?{EVAL}) item
- * s - swash for Unicode-style character class, and the multicharacter
- * strings resulting from casefolding the single-character entries
- * in the character class
- * t - trie struct
- * u - trie struct's widecharmap (a HV, so can't share, must dup)
- * also used for revcharmap and words under DEBUGGING
- * T - aho-trie struct
- * S - sv for named capture lookup
- * 20010712 mjd@plover.com
- * (Remember to update re_dup() and pregfree() if you add any items.)
- */
- struct reg_data {
- U32 count;
- U8 *what;
- void* data[1];
- };
-
- /* Code in S_to_utf8_substr() and S_to_byte_substr() in regexec.c accesses
- anchored* and float* via array indexes 0 and 1. */
- #define anchored_substr substrs->data[0].substr
- #define anchored_utf8 substrs->data[0].utf8_substr
- #define anchored_offset substrs->data[0].min_offset
- #define anchored_end_shift substrs->data[0].end_shift
-
- #define float_substr substrs->data[1].substr
- #define float_utf8 substrs->data[1].utf8_substr
- #define float_min_offset substrs->data[1].min_offset
- #define float_max_offset substrs->data[1].max_offset
- #define float_end_shift substrs->data[1].end_shift
-
- #define check_substr substrs->data[2].substr
- #define check_utf8 substrs->data[2].utf8_substr
- #define check_offset_min substrs->data[2].min_offset
- #define check_offset_max substrs->data[2].max_offset
- #define check_end_shift substrs->data[2].end_shift
-
-
-
- /* trie related stuff */
-
- /* a transition record for the state machine. the
- check field determines which state "owns" the
- transition. the char the transition is for is
- determined by offset from the owning states base
- field. the next field determines which state
- is to be transitioned to if any.
- */
- struct _reg_trie_trans {
- U32 next;
- U32 check;
- };
-
- /* a transition list element for the list based representation */
- struct _reg_trie_trans_list_elem {
- U16 forid;
- U32 newstate;
- };
- typedef struct _reg_trie_trans_list_elem reg_trie_trans_le;
-
- /* a state for compressed nodes. base is an offset
- into an array of reg_trie_trans array. If wordnum is
- nonzero the state is accepting. if base is zero then
- the state has no children (and will be accepting)
- */
- struct _reg_trie_state {
- U16 wordnum;
- union {
- U32 base;
- reg_trie_trans_le* list;
- } trans;
- };
-
-
-
- typedef struct _reg_trie_state reg_trie_state;
- typedef struct _reg_trie_trans reg_trie_trans;
-
-
- /* anything in here that needs to be freed later
- should be dealt with in pregfree.
- refcount is first in both this and _reg_ac_data to allow a space
- optimisation in Perl_regdupe. */
- struct _reg_trie_data {
- U32 refcount; /* number of times this trie is referenced */
- U32 lasttrans; /* last valid transition element */
- U16 *charmap; /* byte to charid lookup array */
- reg_trie_state *states; /* state data */
- reg_trie_trans *trans; /* array of transition elements */
- char *bitmap; /* stclass bitmap */
- U32 *wordlen; /* array of lengths of words */
- U16 *jump; /* optional 1 indexed array of offsets before tail
- for the node following a given word. */
- U16 *nextword; /* optional 1 indexed array to support linked list
- of duplicate wordnums */
- U16 uniquecharcount; /* unique chars in trie (width of trans table) */
- U32 startstate; /* initial state - used for common prefix optimisation */
- STRLEN minlen; /* minimum length of words in trie - build/opt only? */
- STRLEN maxlen; /* maximum length of words in trie - build/opt only? */
- U32 statecount; /* Build only - number of states in the states array
- (including the unused zero state) */
- U32 wordcount; /* Build only */
- #ifdef DEBUGGING
- STRLEN charcount; /* Build only */
- #endif
- };
- /* There is one (3 under DEBUGGING) pointers that logically belong in this
- structure, but are held outside as they need duplication on thread cloning,
- whereas the rest of the structure can be read only:
- HV *widecharmap; code points > 255 to charid
- #ifdef DEBUGGING
- AV *words; Array of words contained in trie, for dumping
- AV *revcharmap; Map of each charid back to its character representation
- #endif
- */
-
- #define TRIE_WORDS_OFFSET 2
-
- typedef struct _reg_trie_data reg_trie_data;
-
- /* refcount is first in both this and _reg_trie_data to allow a space
- optimisation in Perl_regdupe. */
- struct _reg_ac_data {
- U32 refcount;
- U32 trie;
- U32 *fail;
- reg_trie_state *states;
- };
- typedef struct _reg_ac_data reg_ac_data;
-
- /* ANY_BIT doesnt use the structure, so we can borrow it here.
- This is simpler than refactoring all of it as wed end up with
- three different sets... */
-
- #define TRIE_BITMAP(p) (((reg_trie_data *)(p))->bitmap)
- #define TRIE_BITMAP_BYTE(p, c) (TRIE_BITMAP(p)[(((U8)(c)) >> 3) & 31])
- #define TRIE_BITMAP_SET(p, c) (TRIE_BITMAP_BYTE(p, c) |= ANYOF_BIT((U8)c))
- #define TRIE_BITMAP_CLEAR(p,c) (TRIE_BITMAP_BYTE(p, c) &= ~ANYOF_BIT((U8)c))
- #define TRIE_BITMAP_TEST(p, c) (TRIE_BITMAP_BYTE(p, c) & ANYOF_BIT((U8)c))
-
- #define IS_ANYOF_TRIE(op) ((op)==TRIEC || (op)==AHOCORASICKC)
- #define IS_TRIE_AC(op) ((op)>=AHOCORASICK)
-
-
- #define BITMAP_BYTE(p, c) (((U8*)p)[(((U8)(c)) >> 3) & 31])
- #define BITMAP_TEST(p, c) (BITMAP_BYTE(p, c) & ANYOF_BIT((U8)c))
-
- /* these defines assume uniquecharcount is the correct variable, and state may be evaluated twice */
- #define TRIE_NODENUM(state) (((state)-1)/(trie->uniquecharcount)+1)
- #define SAFE_TRIE_NODENUM(state) ((state) ? (((state)-1)/(trie->uniquecharcount)+1) : (state))
- #define TRIE_NODEIDX(state) ((state) ? (((state)-1)*(trie->uniquecharcount)+1) : (state))
-
- #ifdef DEBUGGING
- #define TRIE_CHARCOUNT(trie) ((trie)->charcount)
- #else
- #define TRIE_CHARCOUNT(trie) (trie_charcount)
- #endif
-
- #define RE_TRIE_MAXBUF_INIT 65536
- #define RE_TRIE_MAXBUF_NAME "\022E_TRIE_MAXBUF"
- #define RE_DEBUG_FLAGS "\022E_DEBUG_FLAGS"
-
- /*
-
- RE_DEBUG_FLAGS is used to control what debug output is emitted
- its divided into three groups of options, some of which interact.
- The three groups are: Compile, Execute, Extra. There is room for a
- further group, as currently only the low three bytes are used.
-
- Compile Options:
-
- PARSE
- PEEP
- TRIE
- PROGRAM
- OFFSETS
-
- Execute Options:
-
- INTUIT
- MATCH
- TRIE
-
- Extra Options
-
- TRIE
- OFFSETS
-
- If you modify any of these make sure you make corresponding changes to
- re.pm, especially to the documentation.
-
- */
-
-
- /* Compile */
- #define RE_DEBUG_COMPILE_MASK 0x0000FF
- #define RE_DEBUG_COMPILE_PARSE 0x000001
- #define RE_DEBUG_COMPILE_OPTIMISE 0x000002
- #define RE_DEBUG_COMPILE_TRIE 0x000004
- #define RE_DEBUG_COMPILE_DUMP 0x000008
- #define RE_DEBUG_COMPILE_FLAGS 0x000010
-
- /* Execute */
- #define RE_DEBUG_EXECUTE_MASK 0x00FF00
- #define RE_DEBUG_EXECUTE_INTUIT 0x000100
- #define RE_DEBUG_EXECUTE_MATCH 0x000200
- #define RE_DEBUG_EXECUTE_TRIE 0x000400
-
- /* Extra */
- #define RE_DEBUG_EXTRA_MASK 0xFF0000
- #define RE_DEBUG_EXTRA_TRIE 0x010000
- #define RE_DEBUG_EXTRA_OFFSETS 0x020000
- #define RE_DEBUG_EXTRA_OFFDEBUG 0x040000
- #define RE_DEBUG_EXTRA_STATE 0x080000
- #define RE_DEBUG_EXTRA_OPTIMISE 0x100000
- #define RE_DEBUG_EXTRA_BUFFERS 0x400000
- /* combined */
- #define RE_DEBUG_EXTRA_STACK 0x280000
-
- #define RE_DEBUG_FLAG(x) (re_debug_flags & x)
- /* Compile */
- #define DEBUG_COMPILE_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_COMPILE_MASK) x )
- #define DEBUG_PARSE_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_COMPILE_PARSE) x )
- #define DEBUG_OPTIMISE_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_COMPILE_OPTIMISE) x )
- #define DEBUG_PARSE_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_COMPILE_PARSE) x )
- #define DEBUG_DUMP_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_COMPILE_DUMP) x )
- #define DEBUG_TRIE_COMPILE_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_COMPILE_TRIE) x )
- #define DEBUG_FLAGS_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_COMPILE_FLAGS) x )
- /* Execute */
- #define DEBUG_EXECUTE_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_EXECUTE_MASK) x )
- #define DEBUG_INTUIT_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_EXECUTE_INTUIT) x )
- #define DEBUG_MATCH_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_EXECUTE_MATCH) x )
- #define DEBUG_TRIE_EXECUTE_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_EXECUTE_TRIE) x )
-
- /* Extra */
- #define DEBUG_EXTRA_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_EXTRA_MASK) x )
- #define DEBUG_OFFSETS_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_EXTRA_OFFSETS) x )
- #define DEBUG_STATE_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_EXTRA_STATE) x )
- #define DEBUG_STACK_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_EXTRA_STACK) x )
- #define DEBUG_BUFFERS_r(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_EXTRA_BUFFERS) x )
-
- #define DEBUG_OPTIMISE_MORE_r(x) DEBUG_r( \
- if ((RE_DEBUG_EXTRA_OPTIMISE|RE_DEBUG_COMPILE_OPTIMISE) == \
- (re_debug_flags & (RE_DEBUG_EXTRA_OPTIMISE|RE_DEBUG_COMPILE_OPTIMISE)) ) x )
- #define MJD_OFFSET_DEBUG(x) DEBUG_r( \
- if (re_debug_flags & RE_DEBUG_EXTRA_OFFDEBUG) \
- Perl_warn_nocontext x )
- #define DEBUG_TRIE_COMPILE_MORE_r(x) DEBUG_TRIE_COMPILE_r( \
- if (re_debug_flags & RE_DEBUG_EXTRA_TRIE) x )
- #define DEBUG_TRIE_EXECUTE_MORE_r(x) DEBUG_TRIE_EXECUTE_r( \
- if (re_debug_flags & RE_DEBUG_EXTRA_TRIE) x )
-
- #define DEBUG_TRIE_r(x) DEBUG_r( \
- if (re_debug_flags & (RE_DEBUG_COMPILE_TRIE \
- | RE_DEBUG_EXECUTE_TRIE )) x )
-
- /* initialization */
- /* get_sv() can return NULL during global destruction. */
- #define GET_RE_DEBUG_FLAGS DEBUG_r({ \
- SV * re_debug_flags_sv = NULL; \
- re_debug_flags_sv = get_sv(RE_DEBUG_FLAGS, 1); \
- if (re_debug_flags_sv) { \
- if (!SvIOK(re_debug_flags_sv)) \
- sv_setuv(re_debug_flags_sv, RE_DEBUG_COMPILE_DUMP | RE_DEBUG_EXECUTE_MASK ); \
- re_debug_flags=SvIV(re_debug_flags_sv); \
- }\
- })
-
- #ifdef DEBUGGING
-
- #define GET_RE_DEBUG_FLAGS_DECL IV re_debug_flags = 0; GET_RE_DEBUG_FLAGS;
-
- #define RE_PV_COLOR_DECL(rpv,rlen,isuni,dsv,pv,l,m,c1,c2) \
- const char * const rpv = \
- pv_pretty((dsv), (pv), (l), (m), \
- PL_colors[(c1)],PL_colors[(c2)], \
- PERL_PV_ESCAPE_RE |((isuni) ? PERL_PV_ESCAPE_UNI : 0) ); \
- const int rlen = SvCUR(dsv)
-
- #define RE_SV_ESCAPE(rpv,isuni,dsv,sv,m) \
- const char * const rpv = \
- pv_pretty((dsv), (SvPV_nolen_const(sv)), (SvCUR(sv)), (m), \
- PL_colors[(c1)],PL_colors[(c2)], \
- PERL_PV_ESCAPE_RE |((isuni) ? PERL_PV_ESCAPE_UNI : 0) )
-
- #define RE_PV_QUOTED_DECL(rpv,isuni,dsv,pv,l,m) \
- const char * const rpv = \
- pv_pretty((dsv), (pv), (l), (m), \
- PL_colors[0], PL_colors[1], \
- ( PERL_PV_PRETTY_QUOTE | PERL_PV_ESCAPE_RE | PERL_PV_PRETTY_ELLIPSES | \
- ((isuni) ? PERL_PV_ESCAPE_UNI : 0)) \
- )
-
- #define RE_SV_DUMPLEN(ItEm) (SvCUR(ItEm) - (SvTAIL(ItEm)!=0))
- #define RE_SV_TAIL(ItEm) (SvTAIL(ItEm) ? "$" : "")
-
- #else /* if not DEBUGGING */
-
- #define GET_RE_DEBUG_FLAGS_DECL
- #define RE_PV_COLOR_DECL(rpv,rlen,isuni,dsv,pv,l,m,c1,c2)
- #define RE_SV_ESCAPE(rpv,isuni,dsv,sv,m)
- #define RE_PV_QUOTED_DECL(rpv,isuni,dsv,pv,l,m)
- #define RE_SV_DUMPLEN(ItEm)
- #define RE_SV_TAIL(ItEm)
-
- #endif /* DEBUG RELATED DEFINES */
-
-
-
-