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/* regexp.h
* Copyright (C) 1993, 1994, 1996, 1997, 1999, 2000, 2001, 2003,
* 2005, 2006, 2007, 2008 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.
* Definitions etc. for regexp(3) routines.
* Caveat: this is V8 regexp(3) [actually, a reimplementation thereof],
* not the System V one.
/* we don't want to include this stuff if we are inside of
an external regex engine based on the core one - like re 'debug'*/
#include "utf8.h"
struct regnode {
U8 flags;
U8 type;
U16 next_off;
typedef struct regnode regnode;
struct reg_substr_data;
struct reg_data;
struct regexp_engine;
struct regexp;
struct reg_substr_datum {
I32 min_offset;
I32 max_offset;
SV *substr; /* non-utf8 variant */
SV *utf8_substr; /* utf8 variant */
I32 end_shift;
struct reg_substr_data {
struct reg_substr_datum data[3]; /* Actual array */
#define SV_SAVED_COPY SV *saved_copy; /* If non-NULL, SV which is COW from original */
/* offsets within a string of a particular /(.)/ capture */
typedef struct regexp_paren_pair {
I32 start;
I32 end;
/* 'start_tmp' records a new opening position before the matching end
* has been found, so that the old start and end values are still
* valid, e.g.
* "abc" =~ /(.(?{print "[$1]"}))+/
*outputs [][a][b]
* This field is not part of the API. */
I32 start_tmp;
} regexp_paren_pair;
#if defined(PERL_IN_REGCOMP_C) || defined(PERL_IN_UTF8_C)
#define _invlist_union(a, b, output) _invlist_union_maybe_complement_2nd(a, b, FALSE, output)
#define _invlist_intersection(a, b, output) _invlist_intersection_maybe_complement_2nd(a, b, FALSE, output)
/* Subtracting b from a leaves in a everything that was there that isn't in b,
* that is the intersection of a with b's complement */
#define _invlist_subtract(a, b, output) _invlist_intersection_maybe_complement_2nd(a, b, TRUE, output)
/* record the position of a (?{...}) within a pattern */
struct reg_code_block {
STRLEN start;
OP *block;
REGEXP *src_regex;
The regexp/REGEXP struct, see L<perlreapi> for further documentation
on the individual fields. The struct is ordered so that the most
commonly used fields are placed at the start.
Any patch that adds items to this struct will need to include
changes to F<sv.c> (C<Perl_re_dup()>) and F<regcomp.c>
(C<pregfree()>). This involves freeing or cloning items in the
regexp's data array based on the data item's type.
#define _REGEXP_COMMON \
/* what engine created this regexp? */ \
const struct regexp_engine* engine; \
REGEXP *mother_re; /* what re is this a lightweight copy of? */ \
HV *paren_names; /* Optional hash of paren names */ \
/* Information about the match that the perl core uses to */ \
/* manage things */ \
U32 extflags; /* Flags used both externally and internally */ \
I32 minlen; /* mininum possible number of chars in string to match */\
I32 minlenret; /* mininum possible number of chars in $& */ \
U32 gofs; /* chars left of pos that we search from */ \
/* substring data about strings that must appear in the */ \
/* final match, used for optimisations */ \
struct reg_substr_data *substrs; \
U32 nparens; /* number of capture buffers */ \
/* private engine specific data */ \
U32 intflags; /* Engine Specific Internal flags */ \
void *pprivate; /* Data private to the regex engine which */ \
/* created this object. */ \
/* Data about the last/current match. These are modified */ \
/* during matching */ \
U32 lastparen; /* last open paren matched */ \
U32 lastcloseparen; /* last close paren matched */ \
regexp_paren_pair *swap; /* Unused: 5.10.1 and later */ \
/* Array of offsets for (@-) and (@+) */ \
regexp_paren_pair *offs; \
/* saved or original string so \digit works forever. */ \
char *subbeg; \
SV_SAVED_COPY /* If non-NULL, SV which is COW from original */\
I32 sublen; /* Length of string pointed by subbeg */ \
I32 suboffset; /* byte offset of subbeg from logical start of str */ \
I32 subcoffset; /* suboffset equiv, but in chars (for @-/@+) */ \
/* Information about the match that isn't often used */ \
/* offset from wrapped to the start of precomp */ \
PERL_BITFIELD32 pre_prefix:4; \
CV *qr_anoncv /* the anon sub wrapped round qr/(?{..})/ */
typedef struct regexp {
} regexp;
#define RXp_PAREN_NAMES(rx) ((rx)->paren_names)
/* used for high speed searches */
typedef struct re_scream_pos_data_s
char **scream_olds; /* match pos */
I32 *scream_pos; /* Internal iterator of scream. */
} re_scream_pos_data;
/* regexp_engine structure. This is the dispatch table for regexes.
* Any regex engine implementation must be able to build one of these.
typedef struct regexp_engine {
REGEXP* (*comp) (pTHX_ SV * const pattern, U32 flags);
I32 (*exec) (pTHX_ REGEXP * const rx, char* stringarg, char* strend,
char* strbeg, I32 minend, SV* screamer,
void* data, U32 flags);
char* (*intuit) (pTHX_ REGEXP * const rx, SV *sv, char *strpos,
char *strend, const U32 flags,
re_scream_pos_data *data);
SV* (*checkstr) (pTHX_ REGEXP * const rx);
void (*free) (pTHX_ REGEXP * const rx);
void (*numbered_buff_FETCH) (pTHX_ REGEXP * const rx, const I32 paren,
SV * const sv);
void (*numbered_buff_STORE) (pTHX_ REGEXP * const rx, const I32 paren,
SV const * const value);
I32 (*numbered_buff_LENGTH) (pTHX_ REGEXP * const rx, const SV * const sv,
const I32 paren);
SV* (*named_buff) (pTHX_ REGEXP * const rx, SV * const key,
SV * const value, const U32 flags);
SV* (*named_buff_iter) (pTHX_ REGEXP * const rx, const SV * const lastkey,
const U32 flags);
SV* (*qr_package)(pTHX_ REGEXP * const rx);
void* (*dupe) (pTHX_ REGEXP * const rx, CLONE_PARAMS *param);
REGEXP* (*op_comp) (pTHX_ SV ** const patternp, int pat_count,
OP *expr, const struct regexp_engine* eng,
REGEXP *VOL old_re,
bool *is_bare_re, U32 orig_rx_flags, U32 pm_flags);
} regexp_engine;
These are passed to the numbered capture variable callbacks as the
paren name. >= 1 is reserved for actual numbered captures, i.e. $1,
$2 etc.
#define RX_BUFF_IDX_PREMATCH -2 /* $` */
#define RX_BUFF_IDX_POSTMATCH -1 /* $' */
#define RX_BUFF_IDX_FULLMATCH 0 /* $& */
Flags that are passed to the named_buff and named_buff_iter
callbacks above. Those routines are called from universal.c via the
Tie::Hash::NamedCapture interface for %+ and %- and the re::
functions in the same file.
/* The Tie::Hash::NamedCapture operation this is part of, if any */
#define RXapif_FETCH 0x0001
#define RXapif_STORE 0x0002
#define RXapif_DELETE 0x0004
#define RXapif_CLEAR 0x0008
#define RXapif_EXISTS 0x0010
#define RXapif_SCALAR 0x0020
#define RXapif_FIRSTKEY 0x0040
#define RXapif_NEXTKEY 0x0080
/* Whether %+ or %- is being operated on */
#define RXapif_ONE 0x0100 /* %+ */
#define RXapif_ALL 0x0200 /* %- */
/* Whether this is being called from a re:: function */
#define RXapif_REGNAME 0x0400
#define RXapif_REGNAMES 0x0800
#define RXapif_REGNAMES_COUNT 0x1000
=head1 REGEXP Functions
=for apidoc Am|REGEXP *|SvRX|SV *sv
Convenience macro to get the REGEXP from a SV. This is approximately
equivalent to the following snippet:
if (SvMAGICAL(sv))
if (SvROK(sv))
sv = MUTABLE_SV(SvRV(sv));
if (SvTYPE(sv) == SVt_REGEXP)
return (REGEXP*) sv;
NULL will be returned if a REGEXP* is not found.
=for apidoc Am|bool|SvRXOK|SV* sv
Returns a boolean indicating whether the SV (or the one it references)
is a REGEXP.
If you want to do something with the REGEXP* later use SvRX instead
and check for NULL.
#define SvRX(sv) (Perl_get_re_arg(aTHX_ sv))
#define SvRXOK(sv) (Perl_get_re_arg(aTHX_ sv) ? TRUE : FALSE)
/* Flags stored in regexp->extflags
* These are used by code external to the regexp engine
* Note that the flags whose names start with RXf_PMf_ are defined in
* op_reg_common.h, being copied from the parallel flags of op_pmflags
* NOTE: if you modify any RXf flags you should run or
* regen/ so that regnodes.h is updated with the changes.
#include "op_reg_common.h"
case IGNORE_PAT_MOD: *(pmfl) |= RXf_PMf_FOLD; break; \
case MULTILINE_PAT_MOD: *(pmfl) |= RXf_PMf_MULTILINE; break; \
case SINGLE_PAT_MOD: *(pmfl) |= RXf_PMf_SINGLELINE; break; \
case XTENDED_PAT_MOD: *(pmfl) |= RXf_PMf_EXTENDED; break
/* Note, includes charset ones, assumes 0 is the default for them */
#define STD_PMMOD_FLAGS_CLEAR(pmfl) \
/* chars and strings used as regex pattern modifiers
* Singular is a 'c'har, plural is a "string"
* NOTE, KEEPCOPY was originally 'k', but was changed to 'p' for preserve
* for compatibility reasons with Regexp::Common which highjacked (?k:...)
* for its own uses. So 'k' is out as well.
#define DEFAULT_PAT_MOD '^' /* Short for all the default modifiers */
#define EXEC_PAT_MOD 'e'
#define KEEPCOPY_PAT_MOD 'p'
#define ONCE_PAT_MOD 'o'
#define GLOBAL_PAT_MOD 'g'
#define CONTINUE_PAT_MOD 'c'
#define SINGLE_PAT_MOD 's'
#define IGNORE_PAT_MOD 'i'
#define XTENDED_PAT_MOD 'x'
#define LOCALE_PAT_MOD 'l'
#define UNICODE_PAT_MOD 'u'
#define DEPENDS_PAT_MOD 'd'
#define ONCE_PAT_MODS "o"
#define EXEC_PAT_MODS "e"
#define LOOP_PAT_MODS "gc"
#define LOCALE_PAT_MODS "l"
#define UNICODE_PAT_MODS "u"
#define DEPENDS_PAT_MODS "d"
/* This string is expected by regcomp.c to be ordered so that the first
* character is the flag in bit RXf_PMf_STD_PMMOD_SHIFT of extflags; the next
* character is bit +1, etc. */
#define STD_PAT_MODS "msix"
/* This string is expected by XS_re_regexp_pattern() in universal.c to be ordered
* so that the first character is the flag in bit RXf_PMf_STD_PMMOD_SHIFT of
* extflags; the next character is in bit +1, etc. */
* NOTE: if you modify any RXf flags you should run or
* regen/ so that regnodes.h is updated with the changes.
/* Leave some space, so future bit allocations can go either in the shared or
* unshared area without affecting binary compatibility */
/* Manually decorate this function with gcc-style attributes just to
* avoid having to restructure the header files and their called order,
* as proto.h would have to be included before this file, and isn't */
get_regex_charset_name(const U32 flags, STRLEN* const lenp)
get_regex_charset_name(const U32 flags, STRLEN* const lenp)
/* Returns a string that corresponds to the name of the regex character set
* given by 'flags', and *lenp is set the length of that string, which
* cannot exceed MAX_CHARSET_NAME_LENGTH characters */
*lenp = 1;
switch (get_regex_charset(flags)) {
*lenp = 2;
return "?"; /* Unknown */
Two flags no longer used.
RXf_SPLIT used to be set in Perl_pmruntime if op_flags & OPf_SPECIAL,
i.e., split. It was used by the regex engine to check whether it should
set RXf_SKIPWHITE. Regexp plugins on CPAN also have done the same thing
historically, so we leave these flags defined.
#ifndef PERL_CORE
# define RXf_SPLIT 0
# define RXf_SKIPWHITE 0
/* Anchor and GPOS related stuff */
#define RXf_ANCH_BOL (1<<(RXf_BASE_SHIFT+0))
#define RXf_ANCH_MBOL (1<<(RXf_BASE_SHIFT+1))
#define RXf_ANCH_SBOL (1<<(RXf_BASE_SHIFT+2))
#define RXf_ANCH_GPOS (1<<(RXf_BASE_SHIFT+3))
#define RXf_GPOS_SEEN (1<<(RXf_BASE_SHIFT+4))
#define RXf_GPOS_FLOAT (1<<(RXf_BASE_SHIFT+5))
/* two bits here */
/* What we have seen */
#define RXf_EVAL_SEEN (1<<(RXf_BASE_SHIFT+7))
#define RXf_CANY_SEEN (1<<(RXf_BASE_SHIFT+8))
/* Special */
#define RXf_NOSCAN (1<<(RXf_BASE_SHIFT+9))
#define RXf_CHECK_ALL (1<<(RXf_BASE_SHIFT+10))
/* UTF8 related */
#define RXf_MATCH_UTF8 (1<<(RXf_BASE_SHIFT+11))
/* Intuit related */
#define RXf_USE_INTUIT_NOML (1<<(RXf_BASE_SHIFT+12))
#define RXf_USE_INTUIT_ML (1<<(RXf_BASE_SHIFT+13))
#define RXf_INTUIT_TAIL (1<<(RXf_BASE_SHIFT+14))
#define RXf_MODIFIES_VARS (1<<(RXf_BASE_SHIFT+15))
/* Copy and tainted info */
#define RXf_COPY_DONE (1<<(RXf_BASE_SHIFT+16))
/* during execution: pattern temporarily tainted by executing locale ops;
* post-execution: $1 et al are tainted */
#define RXf_TAINTED_SEEN (1<<(RXf_BASE_SHIFT+17))
/* this pattern was tainted during compilation */
#define RXf_TAINTED (1<<(RXf_BASE_SHIFT+18))
/* Flags indicating special patterns */
#define RXf_START_ONLY (1<<(RXf_BASE_SHIFT+19)) /* Pattern is /^/ */
#define RXf_WHITE (1<<(RXf_BASE_SHIFT+21)) /* Pattern is /\s+/ */
#define RXf_NULL (1U<<(RXf_BASE_SHIFT+22)) /* Pattern is // */
#if RXf_BASE_SHIFT+22 > 31
# error Too many RXf_PMf bits used. See regnodes.h for any spare in middle
* NOTE: if you modify any RXf flags you should run or
* regen/ so that regnodes.h is updated with the changes.
# define RX_ISTAINTED(prog) 0
# define RX_TAINT_on(prog) NOOP
# define RX_ISTAINTED(prog) (RX_EXTFLAGS(prog) & RXf_TAINTED)
# define RX_TAINT_on(prog) (RX_EXTFLAGS(prog) |= RXf_TAINTED)
#define RX_HAS_CUTGROUP(prog) ((prog)->intflags & PREGf_CUTGROUP_SEEN)
#define RX_MATCH_TAINTED_off(prog) (RX_EXTFLAGS(prog) &= ~RXf_TAINTED_SEEN)
#define RX_MATCH_TAINTED_set(prog, t) ((t) \
? RX_MATCH_TAINTED_on(prog) \
: RX_MATCH_TAINTED_off(prog))
#define RXp_MATCH_COPIED(prog) (RXp_EXTFLAGS(prog) & RXf_COPY_DONE)
#define RXp_MATCH_COPIED_on(prog) (RXp_EXTFLAGS(prog) |= RXf_COPY_DONE)
#define RX_MATCH_COPIED_on(prog) (RX_EXTFLAGS(prog) |= RXf_COPY_DONE)
#define RXp_MATCH_COPIED_off(prog) (RXp_EXTFLAGS(prog) &= ~RXf_COPY_DONE)
#define RX_MATCH_COPIED_off(prog) (RX_EXTFLAGS(prog) &= ~RXf_COPY_DONE)
#define RX_MATCH_COPIED_set(prog,t) ((t) \
? RX_MATCH_COPIED_on(prog) \
: RX_MATCH_COPIED_off(prog))
#define RXp_EXTFLAGS(rx) ((rx)->extflags)
/* For source compatibility. We used to store these explicitly. */
#define RX_PRECOMP(prog) (RX_WRAPPED(prog) + ReANY(prog)->pre_prefix)
#define RX_PRECOMP_const(prog) (RX_WRAPPED_const(prog) + ReANY(prog)->pre_prefix)
/* FIXME? Are we hardcoding too much here and constraining plugin extension
writers? Specifically, the value 1 assumes that the wrapped version always
has exactly one character at the end, a ')'. Will that always be true? */
#define RX_PRELEN(prog) (RX_WRAPLEN(prog) - ReANY(prog)->pre_prefix - 1)
#define RX_WRAPPED(prog) ReANY(prog)->xpv_len_u.xpvlenu_pv
#define RX_WRAPPED_const(prog) ((const char *)RX_WRAPPED(prog))
#define RX_WRAPLEN(prog) SvCUR(prog)
#define RX_CHECK_SUBSTR(prog) (ReANY(prog)->check_substr)
#define RX_REFCNT(prog) SvREFCNT(prog)
#define RX_EXTFLAGS(prog) RXp_EXTFLAGS(ReANY(prog))
#define RX_ENGINE(prog) (ReANY(prog)->engine)
#define RX_SUBBEG(prog) (ReANY(prog)->subbeg)
#define RX_SUBOFFSET(prog) (ReANY(prog)->suboffset)
#define RX_SUBCOFFSET(prog) (ReANY(prog)->subcoffset)
#define RX_OFFS(prog) (ReANY(prog)->offs)
#define RX_NPARENS(prog) (ReANY(prog)->nparens)
#define RX_SUBLEN(prog) (ReANY(prog)->sublen)
#define RX_MINLEN(prog) (ReANY(prog)->minlen)
#define RX_MINLENRET(prog) (ReANY(prog)->minlenret)
#define RX_GOFS(prog) (ReANY(prog)->gofs)
#define RX_LASTPAREN(prog) (ReANY(prog)->lastparen)
#define RX_LASTCLOSEPAREN(prog) (ReANY(prog)->lastcloseparen)
#define RX_SAVED_COPY(prog) (ReANY(prog)->saved_copy)
/* Stuff that needs to be included in the pluggable extension goes below here */
#define RX_MATCH_COPY_FREE(rx) \
} \
if (RX_MATCH_COPIED(rx)) { \
Safefree(RX_SUBBEG(rx)); \
RX_MATCH_COPIED_off(rx); \
#define RX_MATCH_COPY_FREE(rx) \
Safefree(RX_SUBBEG(rx)); \
RX_MATCH_COPIED_off(rx); \
#define RXp_MATCH_UTF8(prog) (RXp_EXTFLAGS(prog) & RXf_MATCH_UTF8)
#define RX_MATCH_UTF8(prog) (RX_EXTFLAGS(prog) & RXf_MATCH_UTF8)
#define RX_MATCH_UTF8_on(prog) (RX_EXTFLAGS(prog) |= RXf_MATCH_UTF8)
#define RX_MATCH_UTF8_off(prog) (RX_EXTFLAGS(prog) &= ~RXf_MATCH_UTF8)
#define RX_MATCH_UTF8_set(prog, t) ((t) \
? (RX_MATCH_UTF8_on(prog), (PL_reg_match_utf8 = 1)) \
: (RX_MATCH_UTF8_off(prog), (PL_reg_match_utf8 = 0)))
/* Whether the pattern stored at RX_WRAPPED is in UTF-8 */
#define RX_UTF8(prog) SvUTF8(prog)
#define REXEC_COPY_STR 0x01 /* Need to copy the string. */
#define REXEC_CHECKED 0x02 /* check_substr already checked. */
#define REXEC_SCREAM 0x04 /* use scream table. */
#define REXEC_IGNOREPOS 0x08 /* \G matches at start. */
#define REXEC_NOT_FIRST 0x10 /* This is another iteration of //g. */
/* under REXEC_COPY_STR, it's ok for the
* engine (modulo PL_sawamperand etc)
* to skip copying ... */
#define REXEC_COPY_SKIP_PRE 0x20 /* ...the $` part of the string, or */
#define REXEC_COPY_SKIP_POST 0x40 /* ...the $' part of the string */
#if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
# define ReREFCNT_inc(re) \
({ \
/* This is here to generate a casting warning if incorrect. */ \
REGEXP *const _rerefcnt_inc = (re); \
assert(SvTYPE(_rerefcnt_inc) == SVt_REGEXP); \
SvREFCNT_inc(_rerefcnt_inc); \
_rerefcnt_inc; \
# define ReREFCNT_dec(re) \
({ \
/* This is here to generate a casting warning if incorrect. */ \
REGEXP *const _rerefcnt_dec = (re); \
SvREFCNT_dec(_rerefcnt_dec); \
# define ReREFCNT_dec(re) SvREFCNT_dec(re)
# define ReREFCNT_inc(re) ((REGEXP *) SvREFCNT_inc(re))
#define ReANY(re) S_ReANY((const REGEXP *)(re))
/* FIXME for plugins. */
#define FBMcf_TAIL_DOLLAR 1
#define FBMcf_TAIL_DOLLARM 2
#define FBMcf_TAIL_Z 4
#define FBMcf_TAIL_z 8
#define FBMrf_MULTILINE 1
/* some basic information about the current match that is created by
* Perl_regexec_flags and then passed to regtry(), regmatch() etc */
typedef struct {
REGEXP *prog;
char *bol;
char *till;
SV *sv;
char *ganch;
char *cutpoint;
} regmatch_info;
/* structures for holding and saving the state maintained by regmatch() */
typedef I32 CHECKPOINT;
typedef struct regmatch_state {
int resume_state; /* where to jump to on return */
char *locinput; /* where to backtrack in string on failure */
union {
/* this is a fake union member that matches the first element
* of each member that needs to store positive backtrack
* information */
struct {
struct regmatch_state *prev_yes_state;
} yes;
/* branchlike members */
/* this is a fake union member that matches the first elements
* of each member that needs to behave like a branch */
struct {
/* this first element must match u.yes */
struct regmatch_state *prev_yes_state;
U32 lastparen;
U32 lastcloseparen;
} branchlike;
struct {
/* the first elements must match u.branchlike */
struct regmatch_state *prev_yes_state;
U32 lastparen;
U32 lastcloseparen;
regnode *next_branch; /* next branch node */
} branch;
struct {
/* the first elements must match u.branchlike */
struct regmatch_state *prev_yes_state;
U32 lastparen;
U32 lastcloseparen;
U32 accepted; /* how many accepting states left */
bool longfold;/* saw a fold with a 1->n char mapping */
U16 *jump; /* positive offsets from me */
regnode *me; /* Which node am I - needed for jump tries*/
U8 *firstpos;/* pos in string of first trie match */
U32 firstchars;/* len in chars of firstpos from start */
U16 nextword;/* next word to try */
U16 topword; /* longest accepted word */
} trie;
/* special types - these members are used to store state for special
regops like eval, if/then, lookaround and the markpoint state */
struct {
/* this first element must match u.yes */
struct regmatch_state *prev_yes_state;
struct regmatch_state *prev_eval;
struct regmatch_state *prev_curlyx;
REGEXP *prev_rex;
U32 toggle_reg_flags; /* what bits in PL_reg_flags to
flip when transitioning between
inner and outer rexen */
CHECKPOINT cp; /* remember current savestack indexes */
U32 close_paren; /* which close bracket is our end */
regnode *B; /* the node following us */
} eval;
struct {
/* this first element must match u.yes */
struct regmatch_state *prev_yes_state;
I32 wanted;
I32 logical; /* saved copy of 'logical' var */
regnode *me; /* the IFMATCH/SUSPEND/UNLESSM node */
} ifmatch; /* and SUSPEND/UNLESSM */
struct {
/* this first element must match u.yes */
struct regmatch_state *prev_yes_state;
struct regmatch_state *prev_mark;
SV* mark_name;
char *mark_loc;
} mark;
struct {
int val;
} keeper;
/* quantifiers - these members are used for storing state for
for the regops used to implement quantifiers */
struct {
/* this first element must match u.yes */
struct regmatch_state *prev_yes_state;
struct regmatch_state *prev_curlyx; /* previous cur_curlyx */
regnode *me; /* the CURLYX node */
regnode *B; /* the B node in /A*B/ */
CHECKPOINT cp; /* remember current savestack index */
bool minmod;
int parenfloor;/* how far back to strip paren data */
/* these two are modified by WHILEM */
int count; /* how many instances of A we've matched */
char *lastloc;/* where previous A matched (0-len detect) */
} curlyx;
struct {
/* this first element must match u.yes */
struct regmatch_state *prev_yes_state;
struct regmatch_state *save_curlyx;
CHECKPOINT cp; /* remember current savestack indexes */
char *save_lastloc; /* previous curlyx.lastloc */
I32 cache_offset;
I32 cache_mask;
} whilem;
struct {
/* this first element must match u.yes */
struct regmatch_state *prev_yes_state;
int c1, c2; /* case fold search */
U32 lastparen;
U32 lastcloseparen;
I32 alen; /* length of first-matched A string */
I32 count;
bool minmod;
regnode *A, *B; /* the nodes corresponding to /A*B/ */
regnode *me; /* the curlym node */
U8 c1_utf8[UTF8_MAXBYTES+1]; /* */
U8 c2_utf8[UTF8_MAXBYTES+1];
} curlym;
struct {
U32 paren;
U32 lastparen;
U32 lastcloseparen;
int c1, c2; /* case fold search */
char *maxpos; /* highest possible point in string to match */
char *oldloc; /* the previous locinput */
int count;
int min, max; /* {m,n} */
regnode *A, *B; /* the nodes corresponding to /A*B/ */
U8 c1_utf8[UTF8_MAXBYTES+1]; /* */
U8 c2_utf8[UTF8_MAXBYTES+1];
} curly; /* and CURLYN/PLUS/STAR */
} u;
} regmatch_state;
/* how many regmatch_state structs to allocate as a single slab.
* We do it in 4K blocks for efficiency. The "3" is 2 for the next/prev
* pointers, plus 1 for any mythical malloc overhead. */
((4096 - 3 * sizeof (void*)) / sizeof(regmatch_state))
typedef struct regmatch_slab {
regmatch_state states[PERL_REGMATCH_SLAB_SLOTS];
struct regmatch_slab *prev, *next;
} regmatch_slab;
#define PL_reg_flags PL_reg_state.re_state_reg_flags
#define PL_bostr PL_reg_state.re_state_bostr
#define PL_regeol PL_reg_state.re_state_regeol
#define PL_reg_match_utf8 PL_reg_state.re_state_reg_match_utf8
#define PL_reg_magic PL_reg_state.re_state_reg_magic
#define PL_reg_oldpos PL_reg_state.re_state_reg_oldpos
#define PL_reg_oldcurpm PL_reg_state.re_state_reg_oldcurpm
#define PL_reg_curpm PL_reg_state.re_state_reg_curpm
#define PL_reg_oldsaved PL_reg_state.re_state_reg_oldsaved
#define PL_reg_oldsavedlen PL_reg_state.re_state_reg_oldsavedlen
#define PL_reg_oldsavedoffset PL_reg_state.re_state_reg_oldsavedoffset
#define PL_reg_oldsavedcoffset PL_reg_state.re_state_reg_oldsavedcoffset
#define PL_reg_maxiter PL_reg_state.re_state_reg_maxiter
#define PL_reg_leftiter PL_reg_state.re_state_reg_leftiter
#define PL_reg_poscache PL_reg_state.re_state_reg_poscache
#define PL_reg_poscache_size PL_reg_state.re_state_reg_poscache_size
#define PL_regsize PL_reg_state.re_state_regsize
#define PL_reg_starttry PL_reg_state.re_state_reg_starttry
#define PL_nrs PL_reg_state.re_state_nrs
struct re_save_state {
U32 re_state_reg_flags; /* from regexec.c */
bool re_state_eval_setup_done; /* from regexec.c */
bool re_state_reg_match_utf8; /* from regexec.c */
bool re_reparsing; /* runtime (?{}) fed back into parser */
char *re_state_bostr;
char *re_state_regeol; /* End of input, for $ check. */
MAGIC *re_state_reg_magic; /* from regexec.c */
PMOP *re_state_reg_oldcurpm; /* from regexec.c */
PMOP *re_state_reg_curpm; /* from regexec.c */
char *re_state_reg_oldsaved; /* old saved substr during match */
STRLEN re_state_reg_oldsavedlen; /* old length of saved substr during match */
STRLEN re_state_reg_oldsavedoffset; /* old offset of saved substr during match */
STRLEN re_state_reg_oldsavedcoffset;/* old coffset of saved substr during match */
STRLEN re_state_reg_poscache_size; /* size of pos cache of WHILEM */
I32 re_state_reg_oldpos; /* from regexec.c */
I32 re_state_reg_maxiter; /* max wait until caching pos */
I32 re_state_reg_leftiter; /* wait until caching pos */
U32 re_state_regsize; /* from regexec.c */
char *re_state_reg_poscache; /* cache of pos of WHILEM */
char *re_state_reg_starttry; /* from regexec.c */
SV *re_state_nrs; /* was placeholder: unused since 5.8.0 (5.7.2 patch #12027 for bug ID 20010815.012). Used to save rx->saved_copy */
(1 + ((sizeof(struct re_save_state) - 1) / sizeof(*PL_savestack)))
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
* ex: set ts=8 sts=4 sw=4 et:
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