/* regexp.h
*
* Copyright (C) 1993, 1994, 1996, 1997, 1999, 2000, 2001, 2003,
- * by Larry Wall and others
+ * 2005, 2006 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.
* not the System V one.
*/
#ifndef PLUGGABLE_RE_EXTENSION
-/* we don't want to include this stuff if we are inside Nicholas'
- * pluggable regex engine code */
+/* 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'*/
struct regnode {
U8 flags;
struct reg_data;
struct regexp_engine;
-typedef struct regexp_paren_ofs {
- I32 *startp;
- I32 *endp;
-} regexp_paren_ofs;
-typedef struct regexp {
- I32 *startp;
- I32 *endp;
- regexp_paren_ofs *swap;
- regnode *regstclass;
- struct reg_substr_data *substrs;
- char *precomp; /* pre-compilation regular expression */
- struct reg_data *data; /* Additional data. */
- char *subbeg; /* saved or original string
- so \digit works forever. */
+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 */
+};
+
#ifdef PERL_OLD_COPY_ON_WRITE
- SV *saved_copy; /* If non-NULL, SV which is COW from original */
+#define SV_SAVED_COPY SV *saved_copy; /* If non-NULL, SV which is COW from original */
+#else
+#define SV_SAVED_COPY
#endif
- U32 *offsets; /* offset annotations 20001228 MJD */
- I32 sublen; /* Length of string pointed by subbeg */
- I32 refcnt;
+/* this is ordered such that the most commonly used
+ fields are at the start of the struct */
+typedef struct regexp {
+ /* what engine created this regexp? */
+ const struct regexp_engine* engine;
+
+ /* 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 */
+ I32 *startp; /* Array of offsets from start of string (@-) */
+ I32 *endp; /* Array of offsets from start of string (@+) */
+ char *subbeg; /* saved or original string
+ so \digit works forever. */
+ I32 sublen; /* Length of string pointed by subbeg */
+ SV_SAVED_COPY /* If non-NULL, SV which is COW from original */
+
+
+ /* Information about the match that isn't often used */
+ char *precomp; /* pre-compilation regular expression */
I32 prelen; /* length of precomp */
- U32 nparens; /* number of parentheses */
- U32 lastparen; /* last paren matched */
- U32 lastcloseparen; /* last paren matched */
- U32 reganch; /* Internal use only +
- Tainted information used by regexec? */
- HV *paren_names; /* Paren names */
- const struct regexp_engine* engine;
- regnode program[1]; /* Unwarranted chumminess with compiler. */
+ I32 seen_evals; /* 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 */
} regexp;
-
+/* 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_ char* exp, char* xend, PMOP* pm);
I32 (*exec) (pTHX_ regexp* prog, char* stringarg, char* strend,
struct re_scream_pos_data_s *data);
SV* (*checkstr) (pTHX_ regexp *prog);
void (*free) (pTHX_ struct regexp* r);
- char* (*as_str) (pTHX_ MAGIC *mg, STRLEN *lp, U32 *flags, I32 *haseval);
#ifdef USE_ITHREADS
- regexp* (*dupe) (pTHX_ const regexp *r, CLONE_PARAMS *param);
+ void* (*dupe) (pTHX_ const regexp *r, CLONE_PARAMS *param);
#endif
} regexp_engine;
-#define ROPT_ANCH (ROPT_ANCH_BOL|ROPT_ANCH_MBOL|ROPT_ANCH_GPOS|ROPT_ANCH_SBOL)
-#define ROPT_ANCH_SINGLE (ROPT_ANCH_SBOL|ROPT_ANCH_GPOS)
-#define ROPT_ANCH_BOL 0x00000001
-#define ROPT_ANCH_MBOL 0x00000002
-#define ROPT_ANCH_SBOL 0x00000004
-#define ROPT_ANCH_GPOS 0x00000008
-#define ROPT_SKIP 0x00000010
-#define ROPT_IMPLICIT 0x00000020 /* Converted .* to ^.* */
-#define ROPT_NOSCAN 0x00000040 /* Check-string always at start. */
-#define ROPT_GPOS_SEEN 0x00000080
-#define ROPT_CHECK_ALL 0x00000100
-#define ROPT_LOOKBEHIND_SEEN 0x00000200
-#define ROPT_EVAL_SEEN 0x00000400
-#define ROPT_CANY_SEEN 0x00000800
-#define ROPT_SANY_SEEN ROPT_CANY_SEEN /* src bckwrd cmpt */
-#define ROPT_GPOS_CHECK (ROPT_GPOS_SEEN|ROPT_ANCH_GPOS)
-
-/* 0xF800 of reganch is used by PMf_COMPILETIME */
-
-#define ROPT_UTF8 0x00010000
-#define ROPT_NAUGHTY 0x00020000 /* how exponential is this pattern? */
-#define ROPT_COPY_DONE 0x00040000 /* subbeg is a copy of the string */
-#define ROPT_TAINTED_SEEN 0x00080000
-#define ROPT_MATCH_UTF8 0x10000000 /* subbeg is utf-8 */
-#define ROPT_VERBARG_SEEN 0x20000000
-#define ROPT_CUTGROUP_SEEN 0x40000000
-
-#define RE_USE_INTUIT_NOML 0x00100000 /* Best to intuit before matching */
-#define RE_USE_INTUIT_ML 0x00200000
-#define REINT_AUTORITATIVE_NOML 0x00400000 /* Can trust a positive answer */
-#define REINT_AUTORITATIVE_ML 0x00800000
-#define REINT_ONCE_NOML 0x01000000 /* Intuit can succed once only. */
-#define REINT_ONCE_ML 0x02000000
-#define RE_INTUIT_ONECHAR 0x04000000
-#define RE_INTUIT_TAIL 0x08000000
-
-
-#define RE_USE_INTUIT (RE_USE_INTUIT_NOML|RE_USE_INTUIT_ML)
-#define REINT_AUTORITATIVE (REINT_AUTORITATIVE_NOML|REINT_AUTORITATIVE_ML)
-#define REINT_ONCE (REINT_ONCE_NOML|REINT_ONCE_ML)
-
-#define RX_HAS_CUTGROUP(prog) ((prog)->reganch & ROPT_CUTGROUP_SEEN)
-#define RX_MATCH_TAINTED(prog) ((prog)->reganch & ROPT_TAINTED_SEEN)
-#define RX_MATCH_TAINTED_on(prog) ((prog)->reganch |= ROPT_TAINTED_SEEN)
-#define RX_MATCH_TAINTED_off(prog) ((prog)->reganch &= ~ROPT_TAINTED_SEEN)
+/* 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
+ * stored in op_pmflags and which are defined in op.h, they are defined
+ * numerically here only for clarity.
+ */
+
+/* Anchor and GPOS related stuff */
+#define RXf_ANCH_BOL 0x00000001
+#define RXf_ANCH_MBOL 0x00000002
+#define RXf_ANCH_SBOL 0x00000004
+#define RXf_ANCH_GPOS 0x00000008
+#define RXf_GPOS_SEEN 0x00000010
+#define RXf_GPOS_FLOAT 0x00000020
+/* 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)
+
+/* Flags indicating special patterns */
+#define RXf_START_ONLY 0x00000200 /* Pattern is /^/ */
+#define RXf_WHITE 0x00000400 /* Pattern is /\s+/ */
+
+/* 0xF800 of extflags is used by (RXf_)PMf_COMPILETIME */
+#define RXf_PMf_LOCALE 0x00000800 /* use locale */
+#define RXf_PMf_MULTILINE 0x00001000 /* /m */
+#define RXf_PMf_SINGLELINE 0x00002000 /* /s */
+#define RXf_PMf_FOLD 0x00004000 /* /i */
+#define RXf_PMf_EXTENDED 0x00008000 /* /x */
+#define RXf_PMf_KEEPCOPY 0x00010000 /* /k */
+/* these flags are transfered from the PMOP->op_pmflags member during compilation */
+#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 CASE_STD_PMMOD_FLAGS_PARSE_SET(pmfl) \
+ 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
+
+/* What we have seen */
+#define RXf_LOOKBEHIND_SEEN 0x00020000
+#define RXf_EVAL_SEEN 0x00040000
+#define RXf_CANY_SEEN 0x00080000
+
+/* Special */
+#define RXf_NOSCAN 0x00100000
+#define RXf_CHECK_ALL 0x00200000
+
+/* UTF8 related */
+#define RXf_UTF8 0x00400000
+#define RXf_MATCH_UTF8 0x00800000
+
+/* Intuit related */
+#define RXf_USE_INTUIT_NOML 0x01000000
+#define RXf_USE_INTUIT_ML 0x02000000
+#define RXf_INTUIT_TAIL 0x04000000
+/* one bit here */
+#define RXf_USE_INTUIT (RXf_USE_INTUIT_NOML|RXf_USE_INTUIT_ML)
+
+/* Copy and tainted info */
+#define RXf_COPY_DONE 0x10000000
+#define RXf_TAINTED_SEEN 0x20000000
+/* two bits here */
+
+
+#define RX_HAS_CUTGROUP(prog) ((prog)->intflags & PREGf_CUTGROUP_SEEN)
+#define RX_MATCH_TAINTED(prog) ((prog)->extflags & RXf_TAINTED_SEEN)
+#define RX_MATCH_TAINTED_on(prog) ((prog)->extflags |= RXf_TAINTED_SEEN)
+#define RX_MATCH_TAINTED_off(prog) ((prog)->extflags &= ~RXf_TAINTED_SEEN)
#define RX_MATCH_TAINTED_set(prog, t) ((t) \
? RX_MATCH_TAINTED_on(prog) \
: RX_MATCH_TAINTED_off(prog))
-#define RX_MATCH_COPIED(prog) ((prog)->reganch & ROPT_COPY_DONE)
-#define RX_MATCH_COPIED_on(prog) ((prog)->reganch |= ROPT_COPY_DONE)
-#define RX_MATCH_COPIED_off(prog) ((prog)->reganch &= ~ROPT_COPY_DONE)
+#define RX_MATCH_COPIED(prog) ((prog)->extflags & RXf_COPY_DONE)
+#define RX_MATCH_COPIED_on(prog) ((prog)->extflags |= RXf_COPY_DONE)
+#define RX_MATCH_COPIED_off(prog) ((prog)->extflags &= ~RXf_COPY_DONE)
#define RX_MATCH_COPIED_set(prog,t) ((t) \
? RX_MATCH_COPIED_on(prog) \
: RX_MATCH_COPIED_off(prog))
}} STMT_END
#endif
-#define RX_MATCH_UTF8(prog) ((prog)->reganch & ROPT_MATCH_UTF8)
-#define RX_MATCH_UTF8_on(prog) ((prog)->reganch |= ROPT_MATCH_UTF8)
-#define RX_MATCH_UTF8_off(prog) ((prog)->reganch &= ~ROPT_MATCH_UTF8)
+#define RX_MATCH_UTF8(prog) ((prog)->extflags & RXf_MATCH_UTF8)
+#define RX_MATCH_UTF8_on(prog) ((prog)->extflags |= RXf_MATCH_UTF8)
+#define RX_MATCH_UTF8_off(prog) ((prog)->extflags &= ~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)))
#define FBMrf_MULTILINE 1
-struct re_scream_pos_data_s;
-
/* an accepting state/position*/
struct _reg_trie_accepted {
U8 *endpos;
SV* mark_name;
char *mark_loc;
} mark;
+
+ struct {
+ int val;
+ } keeper;
} u;
} regmatch_state;
#define SAVESTACK_ALLOC_FOR_RE_SAVE_STATE \
(1 + ((sizeof(struct re_save_state) - 1) / sizeof(*PL_savestack)))
+
/*
* Local variables:
* c-indentation-style: bsd
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