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/* regexp.h
*
* Copyright (c) 1997-2003, Larry Wall
*
* 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.
*/
struct regnode {
U8 flags;
U8 type;
U16 next_off;
};
typedef struct regnode regnode;
struct reg_substr_data;
struct reg_data;
typedef struct regexp {
I32 *startp;
I32 *endp;
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. */
#ifdef PERL_COPY_ON_WRITE
SV *saved_copy; /* If non-NULL, SV which is COW from original */
#endif
U32 *offsets; /* offset annotations 20001228 MJD */
I32 sublen; /* Length of string pointed by subbeg */
I32 refcnt;
I32 minlen; /* mininum possible length of $& */
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? */
regnode program[1]; /* Unwarranted chumminess with compiler. */
} regexp;
#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 0x00001
#define ROPT_ANCH_MBOL 0x00002
#define ROPT_ANCH_SBOL 0x00004
#define ROPT_ANCH_GPOS 0x00008
#define ROPT_SKIP 0x00010
#define ROPT_IMPLICIT 0x00020 /* Converted .* to ^.* */
#define ROPT_NOSCAN 0x00040 /* Check-string always at start. */
#define ROPT_GPOS_SEEN 0x00080
#define ROPT_CHECK_ALL 0x00100
#define ROPT_LOOKBEHIND_SEEN 0x00200
#define ROPT_EVAL_SEEN 0x00400
#define ROPT_CANY_SEEN 0x00800
#define ROPT_SANY_SEEN ROPT_CANY_SEEN /* src bckwrd cmpt */
/* 0xf800 of reganch is used by PMf_COMPILETIME */
#define ROPT_UTF8 0x10000
#define ROPT_NAUGHTY 0x20000 /* how exponential is this pattern? */
#define ROPT_COPY_DONE 0x40000 /* subbeg is a copy of the string */
#define ROPT_TAINTED_SEEN 0x80000
#define ROPT_MATCH_UTF8 0x10000000 /* subbeg is utf-8 */
#define RE_USE_INTUIT_NOML 0x0100000 /* Best to intuit before matching */
#define RE_USE_INTUIT_ML 0x0200000
#define REINT_AUTORITATIVE_NOML 0x0400000 /* Can trust a positive answer */
#define REINT_AUTORITATIVE_ML 0x0800000
#define REINT_ONCE_NOML 0x1000000 /* Intuit can succed once only. */
#define REINT_ONCE_ML 0x2000000
#define RE_INTUIT_ONECHAR 0x4000000
#define RE_INTUIT_TAIL 0x8000000
#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_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)
#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_set(prog,t) ((t) \
? RX_MATCH_COPIED_on(prog) \
: RX_MATCH_COPIED_off(prog))
#ifdef PERL_COPY_ON_WRITE
#define RX_MATCH_COPY_FREE(rx) \
STMT_START {if (rx->saved_copy) { \
SV_CHECK_THINKFIRST_COW_DROP(rx->saved_copy); \
} \
if (RX_MATCH_COPIED(rx)) { \
Safefree(rx->subbeg); \
RX_MATCH_COPIED_off(rx); \
}} STMT_END
#else
#define RX_MATCH_COPY_FREE(rx) \
STMT_START {if (RX_MATCH_COPIED(rx)) { \
Safefree(rx->subbeg); \
RX_MATCH_COPIED_off(rx); \
}} 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_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 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 REXEC_ML 0x20 /* $* was set. */
#define ReREFCNT_inc(re) ((void)(re && re->refcnt++), re)
#define ReREFCNT_dec(re) CALLREGFREE(aTHX_ re)
#define FBMcf_TAIL_DOLLAR 1
#define FBMcf_TAIL_DOLLARM 2
#define FBMcf_TAIL_Z 4
#define FBMcf_TAIL_z 8
#define FBMcf_TAIL (FBMcf_TAIL_DOLLAR|FBMcf_TAIL_DOLLARM|FBMcf_TAIL_Z|FBMcf_TAIL_z)
#define FBMrf_MULTILINE 1
struct re_scream_pos_data_s;
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