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/* regexp.h
*/
/*
* 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_data {
U32 count;
U8 *what;
void* data[1];
};
struct reg_substr_datum {
I32 min_offset;
I32 max_offset;
SV *substr;
};
struct reg_substr_data {
struct reg_substr_datum data[3]; /* Actual array */
};
typedef struct regexp {
I32 refcnt;
char **startp;
char **endp;
regnode *regstclass;
I32 minlen; /* mininum possible length of $& */
I32 prelen; /* length of precomp */
U32 nparens; /* number of parentheses */
U32 lastparen; /* last paren matched */
char *precomp; /* pre-compilation regular expression */
char *subbase; /* saved string so \digit works forever */
char *subbeg; /* same, but not responsible for allocation */
char *subend; /* end of subbase */
U16 naughty; /* how exponential is this pattern? */
U16 reganch; /* Internal use only +
Tainted information used by regexec? */
#if 0
SV *anchored_substr; /* Substring at fixed position wrt start. */
I32 anchored_offset; /* Position of it. */
SV *float_substr; /* Substring at variable position wrt start. */
I32 float_min_offset; /* Minimal position of it. */
I32 float_max_offset; /* Maximal position of it. */
SV *check_substr; /* Substring to check before matching. */
I32 check_offset_min; /* Offset of the above. */
I32 check_offset_max; /* Offset of the above. */
#else
struct reg_substr_data *substrs;
#endif
struct reg_data *data; /* Additional data. */
regnode program[1]; /* Unwarranted chumminess with compiler. */
} regexp;
#define anchored_substr substrs->data[0].substr
#define anchored_offset substrs->data[0].min_offset
#define float_substr substrs->data[1].substr
#define float_min_offset substrs->data[1].min_offset
#define float_max_offset substrs->data[1].max_offset
#define check_substr substrs->data[2].substr
#define check_offset_min substrs->data[2].min_offset
#define check_offset_max substrs->data[2].max_offset
#define ROPT_ANCH (ROPT_ANCH_BOL|ROPT_ANCH_MBOL|ROPT_ANCH_GPOS)
#define ROPT_ANCH_SINGLE (ROPT_ANCH_BOL|ROPT_ANCH_GPOS)
#define ROPT_ANCH_BOL 1
#define ROPT_ANCH_MBOL 2
#define ROPT_ANCH_GPOS 4
#define ROPT_SKIP 8
#define ROPT_IMPLICIT 0x10 /* Converted .* to ^.* */
#define ROPT_NOSCAN 0x20 /* Check-string always at start. */
#define ROPT_GPOS_SEEN 0x40
#define ROPT_CHECK_ALL 0x80
#define ROPT_LOOKBEHIND_SEEN 0x100
#define ROPT_EVAL_SEEN 0x200
#define ROPT_TAINTED_SEEN 0x400
/* 0xf800 of reganch is used by PMf_COMPILETIME */
#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 REXEC_COPY_STR 1 /* Need to copy the string. */
#define REXEC_CHECKED 2 /* check_substr already checked. */
#define ReREFCNT_inc(re) ((re && re->refcnt++), re)
#define ReREFCNT_dec(re) pregfree(re)
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