[p5sagit/p5-mst-13.2.git] / regexp.h

/*    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	0x8000

#define RX_MATCH_TAINTED(prog)	((prog)->reganch & ROPT_TAINTED_SEEN)
#define RX_MATCH_TAINTED_SET(prog, t) ((t) \
				       ? ((prog)->reganch |= ROPT_TAINTED_SEEN) \
				       : ((prog)->reganch &= ~ROPT_TAINTED_SEEN))

#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)
Commit	Line	Data
a0d0e21e	1	/* regexp.h
	2	*/
	3
378cc40b	4	/*
	5	* Definitions etc. for regexp(3) routines.
	6	*
	7	* Caveat: this is V8 regexp(3) [actually, a reimplementation thereof],
	8	* not the System V one.
	9	*/
	10
378cc40b	11
c277df42	12	struct regnode {
	13	U8 flags;
	14	U8 type;
	15	U16 next_off;
	16	};
	17
	18	typedef struct regnode regnode;
	19
c31fac66	20	struct reg_data {
	21	U32 count;
	22	U8 *what;
	23	void* data[1];
	24	};
	25
2779dcf1	26	struct reg_substr_datum {
	27	I32 min_offset;
	28	I32 max_offset;
	29	SV *substr;
	30	};
	31
	32	struct reg_substr_data {
	33	struct reg_substr_datum data[3]; /* Actual array */
	34	};
	35
378cc40b	36	typedef struct regexp {
c277df42	37	I32 refcnt;
fe14fcc3	38	char **startp;
fe14fcc3	39	char **endp;
c277df42	40	regnode *regstclass;
79072805	41	I32 minlen; /* mininum possible length of $& */
79072805	42	I32 prelen; /* length of precomp */
a0d0e21e	43	U32 nparens; /* number of parentheses */
a0d0e21e	44	U32 lastparen; /* last paren matched */
378cc40b	45	char precomp; / pre-compilation regular expression */
378cc40b	46	char subbase; / saved string so \digit works forever */
9ef589d8	47	char subbeg; / same, but not responsible for allocation */
00bf170e	48	char subend; / end of subbase */
a0d0e21e	49	U16 naughty; /* how exponential is this pattern? */
c277df42	50	U16 reganch; /* Internal use only +
c277df42	51	Tainted information used by regexec? */
2779dcf1	52	#if 0
c277df42	53	SV anchored_substr; / Substring at fixed position wrt start. */
	54	I32 anchored_offset; /* Position of it. */
	55	SV float_substr; / Substring at variable position wrt start. */
	56	I32 float_min_offset; /* Minimal position of it. */
	57	I32 float_max_offset; /* Maximal position of it. */
	58	SV check_substr; / Substring to check before matching. */
	59	I32 check_offset_min; /* Offset of the above. */
	60	I32 check_offset_max; /* Offset of the above. */
2779dcf1	61	#else
	62	struct reg_substr_data *substrs;
	63	#endif
c277df42	64	struct reg_data data; / Additional data. */
c277df42	65	regnode program[1]; /* Unwarranted chumminess with compiler. */
378cc40b	66	} regexp;
378cc40b	67
2779dcf1	68	#define anchored_substr substrs->data[0].substr
	69	#define anchored_offset substrs->data[0].min_offset
	70	#define float_substr substrs->data[1].substr
	71	#define float_min_offset substrs->data[1].min_offset
	72	#define float_max_offset substrs->data[1].max_offset
	73	#define check_substr substrs->data[2].substr
	74	#define check_offset_min substrs->data[2].min_offset
	75	#define check_offset_max substrs->data[2].max_offset
	76
c277df42	77	#define ROPT_ANCH (ROPT_ANCH_BOL\|ROPT_ANCH_MBOL\|ROPT_ANCH_GPOS)
	78	#define ROPT_ANCH_SINGLE (ROPT_ANCH_BOL\|ROPT_ANCH_GPOS)
	79	#define ROPT_ANCH_BOL 1
	80	#define ROPT_ANCH_MBOL 2
	81	#define ROPT_ANCH_GPOS 4
	82	#define ROPT_SKIP 8
	83	#define ROPT_IMPLICIT 0x10 /* Converted .* to ^.* */
	84	#define ROPT_NOSCAN 0x20 /* Check-string always at start. */
	85	#define ROPT_GPOS_SEEN 0x40
	86	#define ROPT_CHECK_ALL 0x80
	87	#define ROPT_LOOKBEHIND_SEEN 0x100
ce862d02	88	#define ROPT_EVAL_SEEN 0x200
c277df42	89
	90	#define ROPT_TAINTED_SEEN 0x8000
	91
	92	#define RX_MATCH_TAINTED(prog) ((prog)->reganch & ROPT_TAINTED_SEEN)
	93	#define RX_MATCH_TAINTED_SET(prog, t) ((t) \
	94	? ((prog)->reganch \|= ROPT_TAINTED_SEEN) \
	95	: ((prog)->reganch &= ~ROPT_TAINTED_SEEN))
	96
	97	#define REXEC_COPY_STR 1 /* Need to copy the string. */
	98	#define REXEC_CHECKED 2 /* check_substr already checked. */
	99
	100	#define ReREFCNT_inc(re) ((re && re->refcnt++), re)
	101	#define ReREFCNT_dec(re) pregfree(re)