/* regexp.h
*
* Copyright (C) 1993, 1994, 1996, 1997, 1999, 2000, 2001, 2003,
- * 2005, 2006, 2007, by Larry Wall and others
+ * 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.
*
*/
+#include "op_reg_common.h"
+
/*
* Definitions etc. for regexp(3) routines.
*
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 length of string to match */\
+ I32 minlenret; /* mininum possible length of $& */ \
+ 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 */ \
+ /* Information about the match that isn't often used */ \
+ /* offset from wrapped to the start of precomp */ \
+ PERL_BITFIELD32 pre_prefix:4; \
+ /* number of eval groups in the pattern - for security checks */\
+ PERL_BITFIELD32 seen_evals:28
+
typedef struct regexp {
- /* what engine created this regexp? */
- const struct regexp_engine* engine;
- struct regexp* mother_re; /* what re is this a lightweight copy of? */
-
- /* Information about the match that the perl core uses to manage things */
- U32 extflags; /* Flags used both externally and internally */
- I32 minlen; /* mininum possible length of string to match */
- I32 minlenret; /* mininum possible length of $& */
- U32 gofs; /* chars left of pos that we search from */
- struct reg_substr_data *substrs; /* substring data about strings that must appear
- in the final match, used for optimisations */
- 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; /* Swap copy of *offs */
- regexp_paren_pair *offs; /* Array of offsets for (@-) and (@+) */
-
- char *subbeg; /* saved or original string
- so \digit works forever. */
- SV_SAVED_COPY /* If non-NULL, SV which is COW from original */
- I32 sublen; /* Length of string pointed by subbeg */
-
-
- /* Information about the match that isn't often used */
- /* wrapped can't be const char*, as it is returned by sv_2pv_flags */
- char *wrapped; /* wrapped version of the pattern */
- I32 wraplen; /* length of wrapped */
- unsigned pre_prefix:4; /* offset from wrapped to the start of precomp */
- unsigned seen_evals:28; /* number of eval groups in the pattern - for security checks */
- HV *paren_names; /* Optional hash of paren names */
-
- /* Refcount of this regexp */
- I32 refcnt; /* Refcount of this regexp */
+ _XPV_HEAD;
+ _REGEXP_COMMON;
} regexp;
+#define RXp_PAREN_NAMES(rx) ((rx)->paren_names)
+
/* used for high speed searches */
typedef struct re_scream_pos_data_s
{
* Any regex engine implementation must be able to build one of these.
*/
typedef struct regexp_engine {
- REGEXP* (*comp) (pTHX_ const SV * const pattern, const U32 flags);
+ 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);
/* Whether this is being called from a re:: function */
#define RXapif_REGNAME 0x0400
#define RXapif_REGNAMES 0x0800
-#define RXapif_REGNAMES_COUNT 0x1000
+#define RXapif_REGNAMES_COUNT 0x1000
/*
=head1 REGEXP Functions
#define SvRXOK(sv) (Perl_get_re_arg(aTHX_ sv) ? TRUE : FALSE)
-/* Flags stored in regexp->extflags
+/* Flags stored in regexp->extflags
* These are used by code external to the regexp engine
*
* Note that flags starting with RXf_PMf_ have exact equivalents
* numerically here only for clarity.
*
* NOTE: if you modify any RXf flags you should run regen.pl or regcomp.pl
- * so that regnodes.h is updated with the changes.
+ * so that regnodes.h is updated with the changes.
*
*/
/* 0x3F of extflags is used by (RXf_)PMf_COMPILETIME
* If you change these you need to change the equivalent flags in op.h, and
- * vice versa. */
-#define RXf_PMf_MULTILINE 0x00000001 /* /m */
-#define RXf_PMf_SINGLELINE 0x00000002 /* /s */
-#define RXf_PMf_FOLD 0x00000004 /* /i */
-#define RXf_PMf_EXTENDED 0x00000008 /* /x */
-#define RXf_PMf_KEEPCOPY 0x00000010 /* /p */
-#define RXf_PMf_LOCALE 0x00000020 /* use locale */
-/* these flags are transfered from the PMOP->op_pmflags member during compilation */
+ * vice versa. These need to be ordered so that the msix are contiguous
+ * starting at bit 0, followed by the p; bit 0 is because of the shift below
+ * being 0; see STD_PAT_MODS and INT_PAT_MODS below for the contiguity cause */
+/* the flags above are transfered from the PMOP->op_pmflags member during
+ * compilation */
#define RXf_PMf_STD_PMMOD_SHIFT 0
#define RXf_PMf_STD_PMMOD (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_FOLD|RXf_PMf_EXTENDED)
#define RXf_PMf_COMPILETIME (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_LOCALE|RXf_PMf_FOLD|RXf_PMf_EXTENDED|RXf_PMf_KEEPCOPY)
#define SINGLE_PAT_MOD 's'
#define IGNORE_PAT_MOD 'i'
#define XTENDED_PAT_MOD 'x'
+#define NONDESTRUCT_PAT_MOD 'r'
#define ONCE_PAT_MODS "o"
#define KEEPCOPY_PAT_MODS "p"
#define EXEC_PAT_MODS "e"
#define LOOP_PAT_MODS "gc"
+#define NONDESTRUCT_PAT_MODS "r"
+/* This string is expected by regcomp.c to be ordered so that the first
+ * character is the flag in bit 0 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 0 of extflags; the next
+ * character is bit 1, etc. */
#define INT_PAT_MODS STD_PAT_MODS KEEPCOPY_PAT_MODS
#define EXT_PAT_MODS ONCE_PAT_MODS KEEPCOPY_PAT_MODS
#define QR_PAT_MODS STD_PAT_MODS EXT_PAT_MODS
#define M_PAT_MODS QR_PAT_MODS LOOP_PAT_MODS
-#define S_PAT_MODS M_PAT_MODS EXEC_PAT_MODS
+#define S_PAT_MODS M_PAT_MODS EXEC_PAT_MODS NONDESTRUCT_PAT_MODS
/*
* NOTE: if you modify any RXf flags you should run regen.pl or regcomp.pl
- * so that regnodes.h is updated with the changes.
+ * so that regnodes.h is updated with the changes.
*
*/
+#define RXf_BASE_SHIFT ((_RXf_PMf_SHIFT_NEXT)-1)
+
/* Anchor and GPOS related stuff */
-#define RXf_ANCH_BOL 0x00000100
-#define RXf_ANCH_MBOL 0x00000200
-#define RXf_ANCH_SBOL 0x00000400
-#define RXf_ANCH_GPOS 0x00000800
-#define RXf_GPOS_SEEN 0x00001000
-#define RXf_GPOS_FLOAT 0x00002000
+#define RXf_ANCH_BOL (1<<(RXf_BASE_SHIFT+3))
+#define RXf_ANCH_MBOL (1<<(RXf_BASE_SHIFT+4))
+#define RXf_ANCH_SBOL (1<<(RXf_BASE_SHIFT+5))
+#define RXf_ANCH_GPOS (1<<(RXf_BASE_SHIFT+6))
+#define RXf_GPOS_SEEN (1<<(RXf_BASE_SHIFT+7))
+#define RXf_GPOS_FLOAT (1<<(RXf_BASE_SHIFT+8))
/* two bits here */
#define RXf_ANCH (RXf_ANCH_BOL|RXf_ANCH_MBOL|RXf_ANCH_GPOS|RXf_ANCH_SBOL)
#define RXf_GPOS_CHECK (RXf_GPOS_SEEN|RXf_ANCH_GPOS)
#define RXf_ANCH_SINGLE (RXf_ANCH_SBOL|RXf_ANCH_GPOS)
/* What we have seen */
-#define RXf_LOOKBEHIND_SEEN 0x00004000
-#define RXf_EVAL_SEEN 0x00008000
-#define RXf_CANY_SEEN 0x00010000
+#define RXf_LOOKBEHIND_SEEN (1<<(RXf_BASE_SHIFT+9))
+#define RXf_EVAL_SEEN (1<<(RXf_BASE_SHIFT+10))
+#define RXf_CANY_SEEN (1<<(RXf_BASE_SHIFT+11))
/* Special */
-#define RXf_NOSCAN 0x00020000
-#define RXf_CHECK_ALL 0x00040000
+#define RXf_NOSCAN (1<<(RXf_BASE_SHIFT+12))
+#define RXf_CHECK_ALL (1<<(RXf_BASE_SHIFT+13))
/* UTF8 related */
-#define RXf_UTF8 0x00080000
-#define RXf_MATCH_UTF8 0x00100000
+#define RXf_MATCH_UTF8 (1<<(RXf_BASE_SHIFT+15))
/* Intuit related */
-#define RXf_USE_INTUIT_NOML 0x00200000
-#define RXf_USE_INTUIT_ML 0x00400000
-#define RXf_INTUIT_TAIL 0x00800000
+#define RXf_USE_INTUIT_NOML (1<<(RXf_BASE_SHIFT+16))
+#define RXf_USE_INTUIT_ML (1<<(RXf_BASE_SHIFT+17))
+#define RXf_INTUIT_TAIL (1<<(RXf_BASE_SHIFT+18))
/*
Set in Perl_pmruntime if op_flags & OPf_SPECIAL, i.e. split. Will
be used by regex engines to check whether they should set
RXf_SKIPWHITE
*/
-#define RXf_SPLIT 0x01000000
+#define RXf_SPLIT (1<<(RXf_BASE_SHIFT+19))
#define RXf_USE_INTUIT (RXf_USE_INTUIT_NOML|RXf_USE_INTUIT_ML)
/* Copy and tainted info */
-#define RXf_COPY_DONE 0x02000000
-#define RXf_TAINTED_SEEN 0x04000000
-#define RXf_TAINTED 0x08000000 /* this pattern is tainted */
+#define RXf_COPY_DONE (1<<(RXf_BASE_SHIFT+20))
+#define RXf_TAINTED_SEEN (1<<(RXf_BASE_SHIFT+21))
+#define RXf_TAINTED (1<<(RXf_BASE_SHIFT+22)) /* this pattern is tainted */
/* Flags indicating special patterns */
-#define RXf_START_ONLY 0x10000000 /* Pattern is /^/ */
-#define RXf_SKIPWHITE 0x20000000 /* Pattern is for a split / / */
-#define RXf_WHITE 0x40000000 /* Pattern is /\s+/ */
-#define RXf_NULL 0x80000000 /* Pattern is // */
+#define RXf_START_ONLY (1<<(RXf_BASE_SHIFT+23)) /* Pattern is /^/ */
+#define RXf_SKIPWHITE (1<<(RXf_BASE_SHIFT+24)) /* Pattern is for a split / / */
+#define RXf_WHITE (1<<(RXf_BASE_SHIFT+25)) /* Pattern is /\s+/ */
+#define RXf_NULL (1<<(RXf_BASE_SHIFT+26)) /* Pattern is // */
+#if RXf_BASE_SHIFT+26 > 31
+# error Too many RXf_PMf bits used. See regnodes.h for any spare in middle
+#endif
/*
* NOTE: if you modify any RXf flags you should run regen.pl or regcomp.pl
- * so that regnodes.h is updated with the changes.
+ * so that regnodes.h is updated with the changes.
*
*/
? RX_MATCH_COPIED_on(prog) \
: RX_MATCH_COPIED_off(prog))
-#define RXp_PRECOMP(rx) ((rx)->wrapped + (rx)->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 RXp_PRELEN(rx) ((rx)->wraplen - (rx)->pre_prefix - 1)
-#define RXp_WRAPPED(rx) ((rx)->wrapped)
-#define RXp_WRAPLEN(rx) ((rx)->wraplen)
#define RXp_EXTFLAGS(rx) ((rx)->extflags)
/* For source compatibility. We used to store these explicitly. */
-#define RX_PRECOMP(prog) ((prog)->wrapped + (prog)->pre_prefix)
-#define RX_PRELEN(prog) ((prog)->wraplen - (prog)->pre_prefix - 1)
-#define RX_WRAPPED(prog) ((prog)->wrapped)
-#define RX_WRAPLEN(prog) ((prog)->wraplen)
-#define RX_CHECK_SUBSTR(prog) ((prog)->check_substr)
-#define RX_EXTFLAGS(prog) ((prog)->extflags)
-#define RX_REFCNT(prog) ((prog)->refcnt)
-#define RX_ENGINE(prog) ((prog)->engine)
-#define RX_SUBBEG(prog) ((prog)->subbeg)
-#define RX_OFFS(prog) ((prog)->offs)
-#define RX_NPARENS(prog) ((prog)->nparens)
-#define RX_SUBLEN(prog) ((prog)->sublen)
-#define RX_SUBBEG(prog) ((prog)->subbeg)
-#define RX_MINLEN(prog) ((prog)->minlen)
-#define RX_MINLENRET(prog) ((prog)->minlenret)
-#define RX_GOFS(prog) ((prog)->gofs)
-#define RX_LASTPAREN(prog) ((prog)->lastparen)
-#define RX_LASTCLOSEPAREN(prog) ((prog)->lastcloseparen)
-#define RX_SEEN_EVALS(prog) ((prog)->seen_evals)
+#define RX_PRECOMP(prog) (RX_WRAPPED(prog) + ((struct regexp *)SvANY(prog))->pre_prefix)
+#define RX_PRECOMP_const(prog) (RX_WRAPPED_const(prog) + ((struct regexp *)SvANY(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) - ((struct regexp *)SvANY(prog))->pre_prefix - 1)
+#define RX_WRAPPED(prog) SvPVX(prog)
+#define RX_WRAPPED_const(prog) SvPVX_const(prog)
+#define RX_WRAPLEN(prog) SvCUR(prog)
+#define RX_CHECK_SUBSTR(prog) (((struct regexp *)SvANY(prog))->check_substr)
+#define RX_REFCNT(prog) SvREFCNT(prog)
+#if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
+# define RX_EXTFLAGS(prog) \
+ (*({ \
+ const REGEXP *const _rx_extflags = (prog); \
+ assert(SvTYPE(_rx_extflags) == SVt_REGEXP); \
+ &RXp_EXTFLAGS(SvANY(_rx_extflags)); \
+ }))
+# define RX_ENGINE(prog) \
+ (*({ \
+ const REGEXP *const _rx_engine = (prog); \
+ assert(SvTYPE(_rx_engine) == SVt_REGEXP); \
+ &SvANY(_rx_engine)->engine; \
+ }))
+# define RX_SUBBEG(prog) \
+ (*({ \
+ const REGEXP *const _rx_subbeg = (prog); \
+ assert(SvTYPE(_rx_subbeg) == SVt_REGEXP); \
+ &SvANY(_rx_subbeg)->subbeg; \
+ }))
+# define RX_OFFS(prog) \
+ (*({ \
+ const REGEXP *const _rx_offs = (prog); \
+ assert(SvTYPE(_rx_offs) == SVt_REGEXP); \
+ &SvANY(_rx_offs)->offs; \
+ }))
+# define RX_NPARENS(prog) \
+ (*({ \
+ const REGEXP *const _rx_nparens = (prog); \
+ assert(SvTYPE(_rx_nparens) == SVt_REGEXP); \
+ &SvANY(_rx_nparens)->nparens; \
+ }))
+#else
+# define RX_EXTFLAGS(prog) RXp_EXTFLAGS((struct regexp *)SvANY(prog))
+# define RX_ENGINE(prog) (((struct regexp *)SvANY(prog))->engine)
+# define RX_SUBBEG(prog) (((struct regexp *)SvANY(prog))->subbeg)
+# define RX_OFFS(prog) (((struct regexp *)SvANY(prog))->offs)
+# define RX_NPARENS(prog) (((struct regexp *)SvANY(prog))->nparens)
+#endif
+#define RX_SUBLEN(prog) (((struct regexp *)SvANY(prog))->sublen)
+#define RX_MINLEN(prog) (((struct regexp *)SvANY(prog))->minlen)
+#define RX_MINLENRET(prog) (((struct regexp *)SvANY(prog))->minlenret)
+#define RX_GOFS(prog) (((struct regexp *)SvANY(prog))->gofs)
+#define RX_LASTPAREN(prog) (((struct regexp *)SvANY(prog))->lastparen)
+#define RX_LASTCLOSEPAREN(prog) (((struct regexp *)SvANY(prog))->lastcloseparen)
+#define RX_SEEN_EVALS(prog) (((struct regexp *)SvANY(prog))->seen_evals)
+#define RX_SAVED_COPY(prog) (((struct regexp *)SvANY(prog))->saved_copy)
#endif /* PLUGGABLE_RE_EXTENSION */
#ifdef PERL_OLD_COPY_ON_WRITE
#define RX_MATCH_COPY_FREE(rx) \
- STMT_START {if (rx->saved_copy) { \
- SV_CHECK_THINKFIRST_COW_DROP(rx->saved_copy); \
+ STMT_START {if (RX_SAVED_COPY(rx)) { \
+ SV_CHECK_THINKFIRST_COW_DROP(RX_SAVED_COPY(rx)); \
} \
if (RX_MATCH_COPIED(rx)) { \
Safefree(RX_SUBBEG(rx)); \
#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. */
-#define ReREFCNT_inc(re) ((void)(re && re->refcnt++), re)
-#define ReREFCNT_dec(re) CALLREGFREE(re)
+#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); \
+ })
+#else
+# define ReREFCNT_dec(re) SvREFCNT_dec(re)
+# define ReREFCNT_inc(re) ((REGEXP *) SvREFCNT_inc(re))
+#endif
+
+/* FIXME for plugins. */
#define FBMcf_TAIL_DOLLAR 1
#define FBMcf_TAIL_DOLLARM 2
#define FBMrf_MULTILINE 1
-/* an accepting state/position*/
-struct _reg_trie_accepted {
- U8 *endpos;
- U16 wordnum;
-};
-typedef struct _reg_trie_accepted reg_trie_accepted;
-
/* 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;
+ REGEXP *prog;
char *bol;
char *till;
SV *sv;
U32 lastparen;
CHECKPOINT cp;
- reg_trie_accepted *accept_buff; /* accepting states we have seen */
- U32 accepted; /* how many accepting states we have seen */
+ U32 accepted; /* how many accepting states left */
U16 *jump; /* positive offsets from me */
regnode *B; /* node following the trie */
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 */
+ bool longfold;/* saw a fold with a 1->n char mapping */
} trie;
/* special types - these members are used to store state for special
struct regmatch_state *prev_yes_state;
struct regmatch_state *prev_eval;
struct regmatch_state *prev_curlyx;
- regexp *prev_rex;
+ REGEXP *prev_rex;
U32 toggle_reg_flags; /* what bits in PL_reg_flags to
flip when transitioning between
inner and outer rexen */
/* this first element must match u.yes */
struct regmatch_state *prev_yes_state;
struct regmatch_state *prev_curlyx; /* previous cur_curlyx */
- regnode *A, *B; /* the nodes corresponding to /A*B/ */
+ 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 */
- int min; /* the minimal number of A's to match */
- int max; /* the maximal number of A's to match */
/* these two are modified by WHILEM */
int count; /* how many instances of A we've matched */
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