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

/*    regcomp.h
 */

typedef OP OP_4tree;			/* Will be redefined later. */

/*
 * The "internal use only" fields in regexp.h are present to pass info from
 * compile to execute that permits the execute phase to run lots faster on
 * simple cases.  They are:
 *
 * regstart	sv that must begin a match; Nullch if none obvious
 * reganch	is the match anchored (at beginning-of-line only)?
 * regmust	string (pointer into program) that match must include, or NULL
 *  [regmust changed to SV* for bminstr()--law]
 * regmlen	length of regmust string
 *  [regmlen not used currently]
 *
 * Regstart and reganch permit very fast decisions on suitable starting points
 * for a match, cutting down the work a lot.  Regmust permits fast rejection
 * of lines that cannot possibly match.  The regmust tests are costly enough
 * that pregcomp() supplies a regmust only if the r.e. contains something
 * potentially expensive (at present, the only such thing detected is * or +
 * at the start of the r.e., which can involve a lot of backup).  Regmlen is
 * supplied because the test in pregexec() needs it and pregcomp() is computing
 * it anyway.
 * [regmust is now supplied always.  The tests that use regmust have a
 * heuristic that disables the test if it usually matches.]
 *
 * [In fact, we now use regmust in many cases to locate where the search
 * starts in the string, so if regback is >= 0, the regmust search is never
 * wasted effort.  The regback variable says how many characters back from
 * where regmust matched is the earliest possible start of the match.
 * For instance, /[a-z].foo/ has a regmust of 'foo' and a regback of 2.]
 */

/*
 * Structure for regexp "program".  This is essentially a linear encoding
 * of a nondeterministic finite-state machine (aka syntax charts or
 * "railroad normal form" in parsing technology).  Each node is an opcode
 * plus a "next" pointer, possibly plus an operand.  "Next" pointers of
 * all nodes except BRANCH implement concatenation; a "next" pointer with
 * a BRANCH on both ends of it is connecting two alternatives.  (Here we
 * have one of the subtle syntax dependencies:  an individual BRANCH (as
 * opposed to a collection of them) is never concatenated with anything
 * because of operator precedence.)  The operand of some types of node is
 * a literal string; for others, it is a node leading into a sub-FSM.  In
 * particular, the operand of a BRANCH node is the first node of the branch.
 * (NB this is *not* a tree structure:  the tail of the branch connects
 * to the thing following the set of BRANCHes.)  The opcodes are:
 */

/*
 * A node is one char of opcode followed by two chars of "next" pointer.
 * "Next" pointers are stored as two 8-bit pieces, high order first.  The
 * value is a positive offset from the opcode of the node containing it.
 * An operand, if any, simply follows the node.  (Note that much of the
 * code generation knows about this implicit relationship.)
 *
 * Using two bytes for the "next" pointer is vast overkill for most things,
 * but allows patterns to get big without disasters.
 *
 * [The "next" pointer is always aligned on an even
 * boundary, and reads the offset directly as a short.  Also, there is no
 * special test to reverse the sign of BACK pointers since the offset is
 * stored negative.]
 */

struct regnode_string {
    U8	str_len;
    U8  type;
    U16 next_off;
    char string[1];
};

struct regnode_1 {
    U8	flags;
    U8  type;
    U16 next_off;
    U32 arg1;
};

struct regnode_2 {
    U8	flags;
    U8  type;
    U16 next_off;
    U16 arg1;
    U16 arg2;
};

#define ANYOF_BITMAP_SIZE	32	/* 256 b/(8 b/B) */
#define ANYOF_CLASSBITMAP_SIZE	 4	/* up to 32 (8*4) named classes */

struct regnode_charclass {
    U8	flags;
    U8  type;
    U16 next_off;
    U32 arg1;
    char bitmap[ANYOF_BITMAP_SIZE];	/* only compile-time */
};

struct regnode_charclass_class {	/* has [[:blah:]] classes */
    U8	flags;				/* should have ANYOF_CLASS here */
    U8  type;
    U16 next_off;
    U32 arg1;
    char bitmap[ANYOF_BITMAP_SIZE];		/* both compile-time */
    char classflags[ANYOF_CLASSBITMAP_SIZE];	/* and run-time */
};

/* XXX fix this description.
   Impose a limit of REG_INFTY on various pattern matching operations
   to limit stack growth and to avoid "infinite" recursions.
*/
/* The default size for REG_INFTY is I16_MAX, which is the same as
   SHORT_MAX (see perl.h).  Unfortunately I16 isn't necessarily 16 bits
   (see handy.h).  On the Cray C90, sizeof(short)==4 and hence I16_MAX is
   ((1<<31)-1), while on the Cray T90, sizeof(short)==8 and I16_MAX is
   ((1<<63)-1).  To limit stack growth to reasonable sizes, supply a
   smaller default.
	--Andy Dougherty  11 June 1998
*/
#if SHORTSIZE > 2
#  ifndef REG_INFTY
#    define REG_INFTY ((1<<15)-1)
#  endif
#endif

#ifndef REG_INFTY
#  define REG_INFTY I16_MAX
#endif

#define ARG_VALUE(arg) (arg)
#define ARG__SET(arg,val) ((arg) = (val))

#undef ARG
#undef ARG1
#undef ARG2

#define ARG(p) ARG_VALUE(ARG_LOC(p))
#define ARG1(p) ARG_VALUE(ARG1_LOC(p))
#define ARG2(p) ARG_VALUE(ARG2_LOC(p))
#define ARG_SET(p, val) ARG__SET(ARG_LOC(p), (val))
#define ARG1_SET(p, val) ARG__SET(ARG1_LOC(p), (val))
#define ARG2_SET(p, val) ARG__SET(ARG2_LOC(p), (val))

#undef NEXT_OFF
#undef NODE_ALIGN

#ifndef lint
#  define NEXT_OFF(p) ((p)->next_off)
#  define NODE_ALIGN(node)
#  define NODE_ALIGN_FILL(node) ((node)->flags = 0xde) /* deadbeef */
#else /* lint */
#  define NEXT_OFF(p) 0
#  define NODE_ALIGN(node)
#  define NODE_ALIGN_FILL(node)
#endif /* lint */

#define SIZE_ALIGN NODE_ALIGN

#undef OP
#undef OPERAND
#undef MASK
#undef STRING

#define	OP(p)		((p)->type)
#define	OPERAND(p)	(((struct regnode_string *)p)->string)
#define MASK(p)		((char*)OPERAND(p))
#define	STR_LEN(p)	(((struct regnode_string *)p)->str_len)
#define	STRING(p)	(((struct regnode_string *)p)->string)
#define STR_SZ(l)	((l + sizeof(regnode) - 1) / sizeof(regnode))
#define NODE_SZ_STR(p)	(STR_SZ(STR_LEN(p))+1)

#undef NODE_ALIGN
#undef ARG_LOC
#undef NEXTOPER
#undef PREVOPER

#define	NODE_ALIGN(node)
#define	ARG_LOC(p)	(((struct regnode_1 *)p)->arg1)
#define	ARG1_LOC(p)	(((struct regnode_2 *)p)->arg1)
#define	ARG2_LOC(p)	(((struct regnode_2 *)p)->arg2)
#define NODE_STEP_REGNODE	1	/* sizeof(regnode)/sizeof(regnode) */
#define EXTRA_STEP_2ARGS	EXTRA_SIZE(struct regnode_2)

#define NODE_STEP_B	4

#define	NEXTOPER(p)	((p) + NODE_STEP_REGNODE)
#define	PREVOPER(p)	((p) - NODE_STEP_REGNODE)

#define FILL_ADVANCE_NODE(ptr, op) STMT_START { \
    (ptr)->type = op;    (ptr)->next_off = 0;   (ptr)++; } STMT_END
#define FILL_ADVANCE_NODE_ARG(ptr, op, arg) STMT_START { \
    ARG_SET(ptr, arg);  FILL_ADVANCE_NODE(ptr, op); (ptr) += 1; } STMT_END

#define REG_MAGIC 0234

#define SIZE_ONLY (RExC_emit == &PL_regdummy)

/* Flags for node->flags of ANYOF */

#define ANYOF_CLASS		0x08	/* has [[:blah:]] classes */
#define ANYOF_INVERT		0x04
#define ANYOF_FOLD		0x02
#define ANYOF_LOCALE		0x01

/* Used for regstclass only */
#define ANYOF_EOS		0x10		/* Can match an empty string too */

/* There is a character or a range past 0xff */
#define ANYOF_UNICODE		0x20
#define ANYOF_UNICODE_ALL	0x40	/* Can match any char past 0xff */

/* size of node is large (includes class pointer) */
#define ANYOF_LARGE 		0x80

/* Are there any runtime flags on in this node? */
#define ANYOF_RUNTIME(s)	(ANYOF_FLAGS(s) & 0x0f)

#define ANYOF_FLAGS_ALL		0xff

/* Character classes for node->classflags of ANYOF */
/* Should be synchronized with a table in regprop() */
/* 2n should pair with 2n+1 */

#define ANYOF_ALNUM	 0	/* \w, PL_utf8_alnum, utf8::IsWord, ALNUM */
#define ANYOF_NALNUM	 1
#define ANYOF_SPACE	 2	/* \s */
#define ANYOF_NSPACE	 3
#define ANYOF_DIGIT	 4
#define ANYOF_NDIGIT	 5
#define ANYOF_ALNUMC	 6	/* isalnum(3), utf8::IsAlnum, ALNUMC */
#define ANYOF_NALNUMC	 7
#define ANYOF_ALPHA	 8
#define ANYOF_NALPHA	 9
#define ANYOF_ASCII	10
#define ANYOF_NASCII	11
#define ANYOF_CNTRL	12
#define ANYOF_NCNTRL	13
#define ANYOF_GRAPH	14
#define ANYOF_NGRAPH	15
#define ANYOF_LOWER	16
#define ANYOF_NLOWER	17
#define ANYOF_PRINT	18
#define ANYOF_NPRINT	19
#define ANYOF_PUNCT	20
#define ANYOF_NPUNCT	21
#define ANYOF_UPPER	22
#define ANYOF_NUPPER	23
#define ANYOF_XDIGIT	24
#define ANYOF_NXDIGIT	25
#define ANYOF_PSXSPC	26	/* POSIX space: \s plus the vertical tab */
#define ANYOF_NPSXSPC	27
#define ANYOF_BLANK	28	/* GNU extension: space and tab: non-vertical space */
#define ANYOF_NBLANK	29

#define ANYOF_MAX	32

/* Backward source code compatibility. */

#define ANYOF_ALNUML	 ANYOF_ALNUM
#define ANYOF_NALNUML	 ANYOF_NALNUM
#define ANYOF_SPACEL	 ANYOF_SPACE
#define ANYOF_NSPACEL	 ANYOF_NSPACE

/* Utility macros for the bitmap and classes of ANYOF */

#define ANYOF_SIZE		(sizeof(struct regnode_charclass))
#define ANYOF_CLASS_SIZE	(sizeof(struct regnode_charclass_class))

#define ANYOF_FLAGS(p)		((p)->flags)

#define ANYOF_BIT(c)		(1 << ((c) & 7))

#define ANYOF_CLASS_BYTE(p, c)	(((struct regnode_charclass_class*)(p))->classflags[((c) >> 3) & 3])
#define ANYOF_CLASS_SET(p, c)	(ANYOF_CLASS_BYTE(p, c) |=  ANYOF_BIT(c))
#define ANYOF_CLASS_CLEAR(p, c)	(ANYOF_CLASS_BYTE(p, c) &= ~ANYOF_BIT(c))
#define ANYOF_CLASS_TEST(p, c)	(ANYOF_CLASS_BYTE(p, c) &   ANYOF_BIT(c))

#define ANYOF_CLASS_ZERO(ret)	Zero(((struct regnode_charclass_class*)(ret))->classflags, ANYOF_CLASSBITMAP_SIZE, char)
#define ANYOF_BITMAP_ZERO(ret)	Zero(((struct regnode_charclass*)(ret))->bitmap, ANYOF_BITMAP_SIZE, char)

#define ANYOF_BITMAP(p)		(((struct regnode_charclass*)(p))->bitmap)
#define ANYOF_BITMAP_BYTE(p, c)	(ANYOF_BITMAP(p)[((c) >> 3) & 31])
#define ANYOF_BITMAP_SET(p, c)	(ANYOF_BITMAP_BYTE(p, c) |=  ANYOF_BIT(c))
#define ANYOF_BITMAP_CLEAR(p,c)	(ANYOF_BITMAP_BYTE(p, c) &= ~ANYOF_BIT(c))
#define ANYOF_BITMAP_TEST(p, c)	(ANYOF_BITMAP_BYTE(p, c) &   ANYOF_BIT(c))

#define ANYOF_SKIP		((ANYOF_SIZE - 1)/sizeof(regnode))
#define ANYOF_CLASS_SKIP	((ANYOF_CLASS_SIZE - 1)/sizeof(regnode))
#define ANYOF_CLASS_ADD_SKIP	(ANYOF_CLASS_SKIP - ANYOF_SKIP)

/*
 * Utility definitions.
 */
#ifndef lint
#ifndef CHARMASK
#define	UCHARAT(p)	((int)*(U8*)(p))
#else
#define	UCHARAT(p)	((int)*(p)&CHARMASK)
#endif
#else /* lint */
#define UCHARAT(p)	PL_regdummy
#endif /* lint */

#define EXTRA_SIZE(guy) ((sizeof(guy)-1)/sizeof(struct regnode))

#define REG_SEEN_ZERO_LEN	 1
#define REG_SEEN_LOOKBEHIND	 2
#define REG_SEEN_GPOS		 4
#define REG_SEEN_EVAL		 8
#define REG_SEEN_CANY		16
#define REG_SEEN_SANY		REG_SEEN_CANY /* src bckwrd cmpt */

START_EXTERN_C

#include "regnodes.h"

/* The following have no fixed length. U8 so we can do strchr() on it. */
#ifndef DOINIT
EXTCONST U8 PL_varies[];
#else
EXTCONST U8 PL_varies[] = {
    BRANCH, BACK, STAR, PLUS, CURLY, CURLYX, REF, REFF, REFFL, 
    WHILEM, CURLYM, CURLYN, BRANCHJ, IFTHEN, SUSPEND, CLUMP, 0
};
#endif

/* The following always have a length of 1. U8 we can do strchr() on it. */
/* (Note that length 1 means "one character" under UTF8, not "one octet".) */
#ifndef DOINIT
EXTCONST U8 PL_simple[];
#else
EXTCONST U8 PL_simple[] = {
    REG_ANY,	SANY,	CANY,
    ANYOF,
    ALNUM,	ALNUML,
    NALNUM,	NALNUML,
    SPACE,	SPACEL,
    NSPACE,	NSPACEL,
    DIGIT,	NDIGIT,
    0
};
#endif

END_EXTERN_C

typedef struct re_scream_pos_data_s
{
    char **scream_olds;		/* match pos */
    I32 *scream_pos;		/* Internal iterator of scream. */
} re_scream_pos_data;

/* .what is a character array with one character for each member of .data
 * The character describes the function of the corresponding .data item:
 *   f - start-class data for regstclass optimization  
 *   n - Root of op tree for (?{EVAL}) item
 *   o - Start op for (?{EVAL}) item
 *   p - Pad for (?{EVAL} item
 *   s - swash for unicode-style character class
 * 20010712 mjd@plover.com
 * (Remember to update re_dup() and pregfree() if you add any items.)
 */
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 */
};

#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
Commit	Line	Data
a0d0e21e	1	/* regcomp.h
a687059c	2	*/
a687059c	3
c277df42	4	typedef OP OP_4tree; /* Will be redefined later. */
c277df42	5
a687059c	6	/*
	7	* The "internal use only" fields in regexp.h are present to pass info from
	8	* compile to execute that permits the execute phase to run lots faster on
	9	* simple cases. They are:
	10	*
79072805	11	* regstart sv that must begin a match; Nullch if none obvious
a687059c	12	* reganch is the match anchored (at beginning-of-line only)?
a687059c	13	* regmust string (pointer into program) that match must include, or NULL
79072805	14	* [regmust changed to SV* for bminstr()--law]
a687059c	15	* regmlen length of regmust string
	16	* [regmlen not used currently]
	17	*
	18	* Regstart and reganch permit very fast decisions on suitable starting points
	19	* for a match, cutting down the work a lot. Regmust permits fast rejection
	20	* of lines that cannot possibly match. The regmust tests are costly enough
e50aee73	21	* that pregcomp() supplies a regmust only if the r.e. contains something
a687059c	22	* potentially expensive (at present, the only such thing detected is * or +
a687059c	23	* at the start of the r.e., which can involve a lot of backup). Regmlen is
e50aee73	24	* supplied because the test in pregexec() needs it and pregcomp() is computing
a687059c	25	* it anyway.
	26	* [regmust is now supplied always. The tests that use regmust have a
	27	* heuristic that disables the test if it usually matches.]
	28	*
	29	* [In fact, we now use regmust in many cases to locate where the search
	30	* starts in the string, so if regback is >= 0, the regmust search is never
	31	* wasted effort. The regback variable says how many characters back from
	32	* where regmust matched is the earliest possible start of the match.
	33	* For instance, /[a-z].foo/ has a regmust of 'foo' and a regback of 2.]
	34	*/
	35
	36	/*
	37	* Structure for regexp "program". This is essentially a linear encoding
	38	* of a nondeterministic finite-state machine (aka syntax charts or
	39	* "railroad normal form" in parsing technology). Each node is an opcode
	40	* plus a "next" pointer, possibly plus an operand. "Next" pointers of
	41	* all nodes except BRANCH implement concatenation; a "next" pointer with
	42	* a BRANCH on both ends of it is connecting two alternatives. (Here we
	43	* have one of the subtle syntax dependencies: an individual BRANCH (as
	44	* opposed to a collection of them) is never concatenated with anything
	45	* because of operator precedence.) The operand of some types of node is
	46	* a literal string; for others, it is a node leading into a sub-FSM. In
	47	* particular, the operand of a BRANCH node is the first node of the branch.
	48	* (NB this is not a tree structure: the tail of the branch connects
	49	* to the thing following the set of BRANCHes.) The opcodes are:
	50	*/
	51
a687059c	52	/*
	53	* A node is one char of opcode followed by two chars of "next" pointer.
	54	* "Next" pointers are stored as two 8-bit pieces, high order first. The
	55	* value is a positive offset from the opcode of the node containing it.
	56	* An operand, if any, simply follows the node. (Note that much of the
	57	* code generation knows about this implicit relationship.)
	58	*
	59	* Using two bytes for the "next" pointer is vast overkill for most things,
	60	* but allows patterns to get big without disasters.
	61	*
e91177ed	62	* [The "next" pointer is always aligned on an even
a687059c	63	* boundary, and reads the offset directly as a short. Also, there is no
	64	* special test to reverse the sign of BACK pointers since the offset is
	65	* stored negative.]
	66	*/
	67
c277df42	68	struct regnode_string {
cd439c50	69	U8 str_len;
c277df42	70	U8 type;
c277df42	71	U16 next_off;
cd439c50	72	char string[1];
c277df42	73	};
a687059c	74
c277df42	75	struct regnode_1 {
	76	U8 flags;
	77	U8 type;
	78	U16 next_off;
	79	U32 arg1;
	80	};
	81
	82	struct regnode_2 {
	83	U8 flags;
	84	U8 type;
	85	U16 next_off;
	86	U16 arg1;
	87	U16 arg2;
	88	};
	89
936ed897	90	#define ANYOF_BITMAP_SIZE 32 /* 256 b/(8 b/B) */
ffc61ed2	91	#define ANYOF_CLASSBITMAP_SIZE 4 /* up to 32 (84) named classes /
936ed897	92
	93	struct regnode_charclass {
	94	U8 flags;
	95	U8 type;
	96	U16 next_off;
ffc61ed2	97	U32 arg1;
19103b91	98	char bitmap[ANYOF_BITMAP_SIZE]; /* only compile-time */
936ed897	99	};
936ed897	100
19103b91	101	struct regnode_charclass_class { /* has [[:blah:]] classes */
19103b91	102	U8 flags; /* should have ANYOF_CLASS here */
936ed897	103	U8 type;
936ed897	104	U16 next_off;
ffc61ed2	105	U32 arg1;
19103b91	106	char bitmap[ANYOF_BITMAP_SIZE]; /* both compile-time */
19103b91	107	char classflags[ANYOF_CLASSBITMAP_SIZE]; /* and run-time */
936ed897	108	};
936ed897	109
9c7e81e8	110	/* XXX fix this description.
	111	Impose a limit of REG_INFTY on various pattern matching operations
	112	to limit stack growth and to avoid "infinite" recursions.
	113	*/
	114	/* The default size for REG_INFTY is I16_MAX, which is the same as
	115	SHORT_MAX (see perl.h). Unfortunately I16 isn't necessarily 16 bits
	116	(see handy.h). On the Cray C90, sizeof(short)==4 and hence I16_MAX is
	117	((1<<31)-1), while on the Cray T90, sizeof(short)==8 and I16_MAX is
	118	((1<<63)-1). To limit stack growth to reasonable sizes, supply a
	119	smaller default.
	120	--Andy Dougherty 11 June 1998
	121	*/
	122	#if SHORTSIZE > 2
	123	# ifndef REG_INFTY
	124	# define REG_INFTY ((1<<15)-1)
	125	# endif
	126	#endif
	127
	128	#ifndef REG_INFTY
83cfe48c	129	# define REG_INFTY I16_MAX
83cfe48c	130	#endif
a687059c	131
e91177ed	132	#define ARG_VALUE(arg) (arg)
e91177ed	133	#define ARG__SET(arg,val) ((arg) = (val))
c277df42	134
e8e3b0fb	135	#undef ARG
	136	#undef ARG1
	137	#undef ARG2
	138
c277df42	139	#define ARG(p) ARG_VALUE(ARG_LOC(p))
	140	#define ARG1(p) ARG_VALUE(ARG1_LOC(p))
	141	#define ARG2(p) ARG_VALUE(ARG2_LOC(p))
	142	#define ARG_SET(p, val) ARG__SET(ARG_LOC(p), (val))
	143	#define ARG1_SET(p, val) ARG__SET(ARG1_LOC(p), (val))
	144	#define ARG2_SET(p, val) ARG__SET(ARG2_LOC(p), (val))
	145
e8e3b0fb	146	#undef NEXT_OFF
	147	#undef NODE_ALIGN
	148
c277df42	149	#ifndef lint
e91177ed	150	# define NEXT_OFF(p) ((p)->next_off)
	151	# define NODE_ALIGN(node)
	152	# define NODE_ALIGN_FILL(node) ((node)->flags = 0xde) /* deadbeef */
a687059c	153	#else /* lint */
c277df42	154	# define NEXT_OFF(p) 0
e91177ed	155	# define NODE_ALIGN(node)
e91177ed	156	# define NODE_ALIGN_FILL(node)
a687059c	157	#endif /* lint */
a687059c	158
c277df42	159	#define SIZE_ALIGN NODE_ALIGN
c277df42	160
e8e3b0fb	161	#undef OP
	162	#undef OPERAND
	163	#undef MASK
	164	#undef STRING
	165
e91177ed	166	#define OP(p) ((p)->type)
e91177ed	167	#define OPERAND(p) (((struct regnode_string *)p)->string)
cd439c50	168	#define MASK(p) ((char*)OPERAND(p))
	169	#define STR_LEN(p) (((struct regnode_string *)p)->str_len)
	170	#define STRING(p) (((struct regnode_string *)p)->string)
	171	#define STR_SZ(l) ((l + sizeof(regnode) - 1) / sizeof(regnode))
	172	#define NODE_SZ_STR(p) (STR_SZ(STR_LEN(p))+1)
	173
e8e3b0fb	174	#undef NODE_ALIGN
	175	#undef ARG_LOC
	176	#undef NEXTOPER
	177	#undef PREVOPER
	178
e91177ed	179	#define NODE_ALIGN(node)
	180	#define ARG_LOC(p) (((struct regnode_1 *)p)->arg1)
	181	#define ARG1_LOC(p) (((struct regnode_2 *)p)->arg1)
	182	#define ARG2_LOC(p) (((struct regnode_2 *)p)->arg2)
	183	#define NODE_STEP_REGNODE 1 /* sizeof(regnode)/sizeof(regnode) */
	184	#define EXTRA_STEP_2ARGS EXTRA_SIZE(struct regnode_2)
	185
	186	#define NODE_STEP_B 4
c277df42	187
	188	#define NEXTOPER(p) ((p) + NODE_STEP_REGNODE)
	189	#define PREVOPER(p) ((p) - NODE_STEP_REGNODE)
	190
e91177ed	191	#define FILL_ADVANCE_NODE(ptr, op) STMT_START { \
c277df42	192	(ptr)->type = op; (ptr)->next_off = 0; (ptr)++; } STMT_END
e91177ed	193	#define FILL_ADVANCE_NODE_ARG(ptr, op, arg) STMT_START { \
c277df42	194	ARG_SET(ptr, arg); FILL_ADVANCE_NODE(ptr, op); (ptr) += 1; } STMT_END
a687059c	195
22c35a8c	196	#define REG_MAGIC 0234
a687059c	197
830247a4	198	#define SIZE_ONLY (RExC_emit == &PL_regdummy)
c277df42	199
936ed897	200	/* Flags for node->flags of ANYOF */
b8c5462f	201
19103b91	202	#define ANYOF_CLASS 0x08 /* has [[:blah:]] classes */
ffc61ed2	203	#define ANYOF_INVERT 0x04
	204	#define ANYOF_FOLD 0x02
	205	#define ANYOF_LOCALE 0x01
b8c5462f	206
653099ff	207	/* Used for regstclass only */
ffc61ed2	208	#define ANYOF_EOS 0x10 /* Can match an empty string too */
	209
	210	/* There is a character or a range past 0xff */
	211	#define ANYOF_UNICODE 0x20
1aa99e6b	212	#define ANYOF_UNICODE_ALL 0x40 /* Can match any char past 0xff */
ffc61ed2	213
4f66b38d	214	/* size of node is large (includes class pointer) */
	215	#define ANYOF_LARGE 0x80
	216
ffc61ed2	217	/* Are there any runtime flags on in this node? */
	218	#define ANYOF_RUNTIME(s) (ANYOF_FLAGS(s) & 0x0f)
	219
	220	#define ANYOF_FLAGS_ALL 0xff
653099ff	221
936ed897	222	/* Character classes for node->classflags of ANYOF */
653099ff	223	/* Should be synchronized with a table in regprop() */
653099ff	224	/* 2n should pair with 2n+1 */
b8c5462f	225
289d4f09	226	#define ANYOF_ALNUM 0 /* \w, PL_utf8_alnum, utf8::IsWord, ALNUM */
b8c5462f	227	#define ANYOF_NALNUM 1
aaa51d5e	228	#define ANYOF_SPACE 2 /* \s */
b8c5462f	229	#define ANYOF_NSPACE 3
	230	#define ANYOF_DIGIT 4
	231	#define ANYOF_NDIGIT 5
289d4f09	232	#define ANYOF_ALNUMC 6 /* isalnum(3), utf8::IsAlnum, ALNUMC */
b8c5462f	233	#define ANYOF_NALNUMC 7
	234	#define ANYOF_ALPHA 8
	235	#define ANYOF_NALPHA 9
	236	#define ANYOF_ASCII 10
	237	#define ANYOF_NASCII 11
	238	#define ANYOF_CNTRL 12
	239	#define ANYOF_NCNTRL 13
	240	#define ANYOF_GRAPH 14
	241	#define ANYOF_NGRAPH 15
	242	#define ANYOF_LOWER 16
	243	#define ANYOF_NLOWER 17
	244	#define ANYOF_PRINT 18
	245	#define ANYOF_NPRINT 19
	246	#define ANYOF_PUNCT 20
	247	#define ANYOF_NPUNCT 21
	248	#define ANYOF_UPPER 22
	249	#define ANYOF_NUPPER 23
	250	#define ANYOF_XDIGIT 24
	251	#define ANYOF_NXDIGIT 25
aaa51d5e	252	#define ANYOF_PSXSPC 26 /* POSIX space: \s plus the vertical tab */
aaa51d5e	253	#define ANYOF_NPSXSPC 27
ffc61ed2	254	#define ANYOF_BLANK 28 /* GNU extension: space and tab: non-vertical space */
289d4f09	255	#define ANYOF_NBLANK 29
b8c5462f	256
aaa51d5e	257	#define ANYOF_MAX 32
b8c5462f	258
	259	/* Backward source code compatibility. */
	260
	261	#define ANYOF_ALNUML ANYOF_ALNUM
	262	#define ANYOF_NALNUML ANYOF_NALNUM
	263	#define ANYOF_SPACEL ANYOF_SPACE
	264	#define ANYOF_NSPACEL ANYOF_NSPACE
	265
	266	/* Utility macros for the bitmap and classes of ANYOF */
	267
936ed897	268	#define ANYOF_SIZE (sizeof(struct regnode_charclass))
936ed897	269	#define ANYOF_CLASS_SIZE (sizeof(struct regnode_charclass_class))
b8c5462f	270
936ed897	271	#define ANYOF_FLAGS(p) ((p)->flags)
b8c5462f	272
	273	#define ANYOF_BIT(c) (1 << ((c) & 7))
	274
936ed897	275	#define ANYOF_CLASS_BYTE(p, c) (((struct regnode_charclass_class*)(p))->classflags[((c) >> 3) & 3])
b8c5462f	276	#define ANYOF_CLASS_SET(p, c) (ANYOF_CLASS_BYTE(p, c) \|= ANYOF_BIT(c))
	277	#define ANYOF_CLASS_CLEAR(p, c) (ANYOF_CLASS_BYTE(p, c) &= ~ANYOF_BIT(c))
	278	#define ANYOF_CLASS_TEST(p, c) (ANYOF_CLASS_BYTE(p, c) & ANYOF_BIT(c))
	279
936ed897	280	#define ANYOF_CLASS_ZERO(ret) Zero(((struct regnode_charclass_class*)(ret))->classflags, ANYOF_CLASSBITMAP_SIZE, char)
	281	#define ANYOF_BITMAP_ZERO(ret) Zero(((struct regnode_charclass*)(ret))->bitmap, ANYOF_BITMAP_SIZE, char)
	282
	283	#define ANYOF_BITMAP(p) (((struct regnode_charclass*)(p))->bitmap)
	284	#define ANYOF_BITMAP_BYTE(p, c) (ANYOF_BITMAP(p)[((c) >> 3) & 31])
b8c5462f	285	#define ANYOF_BITMAP_SET(p, c) (ANYOF_BITMAP_BYTE(p, c) \|= ANYOF_BIT(c))
	286	#define ANYOF_BITMAP_CLEAR(p,c) (ANYOF_BITMAP_BYTE(p, c) &= ~ANYOF_BIT(c))
	287	#define ANYOF_BITMAP_TEST(p, c) (ANYOF_BITMAP_BYTE(p, c) & ANYOF_BIT(c))
	288
936ed897	289	#define ANYOF_SKIP ((ANYOF_SIZE - 1)/sizeof(regnode))
	290	#define ANYOF_CLASS_SKIP ((ANYOF_CLASS_SIZE - 1)/sizeof(regnode))
	291	#define ANYOF_CLASS_ADD_SKIP (ANYOF_CLASS_SKIP - ANYOF_SKIP)
c277df42	292
a687059c	293	/*
	294	* Utility definitions.
	295	*/
	296	#ifndef lint
2304df62	297	#ifndef CHARMASK
4d61ec05	298	#define UCHARAT(p) ((int)(U8)(p))
a687059c	299	#else
2304df62	300	#define UCHARAT(p) ((int)*(p)&CHARMASK)
a687059c	301	#endif
a687059c	302	#else /* lint */
6b88bc9c	303	#define UCHARAT(p) PL_regdummy
a687059c	304	#endif /* lint */
a687059c	305
c277df42	306	#define EXTRA_SIZE(guy) ((sizeof(guy)-1)/sizeof(struct regnode))
c277df42	307
3baa4c62	308	#define REG_SEEN_ZERO_LEN 1
	309	#define REG_SEEN_LOOKBEHIND 2
	310	#define REG_SEEN_GPOS 4
	311	#define REG_SEEN_EVAL 8
cce850e4	312	#define REG_SEEN_CANY 16
cce850e4	313	#define REG_SEEN_SANY REG_SEEN_CANY /* src bckwrd cmpt */
d09b2d29	314
73c4f7a1	315	START_EXTERN_C
73c4f7a1	316
d09b2d29	317	#include "regnodes.h"
d09b2d29	318
4d61ec05	319	/* The following have no fixed length. U8 so we can do strchr() on it. */
d09b2d29	320	#ifndef DOINIT
4d61ec05	321	EXTCONST U8 PL_varies[];
d09b2d29	322	#else
4d61ec05	323	EXTCONST U8 PL_varies[] = {
d09b2d29	324	BRANCH, BACK, STAR, PLUS, CURLY, CURLYX, REF, REFF, REFFL,
a0ed51b3	325	WHILEM, CURLYM, CURLYN, BRANCHJ, IFTHEN, SUSPEND, CLUMP, 0
c277df42	326	};
d09b2d29	327	#endif
c277df42	328
4d61ec05	329	/* The following always have a length of 1. U8 we can do strchr() on it. */
4d61ec05	330	/* (Note that length 1 means "one character" under UTF8, not "one octet".) */
d09b2d29	331	#ifndef DOINIT
4d61ec05	332	EXTCONST U8 PL_simple[];
d09b2d29	333	#else
4d61ec05	334	EXTCONST U8 PL_simple[] = {
f33976b4	335	REG_ANY, SANY, CANY,
ffc61ed2	336	ANYOF,
	337	ALNUM, ALNUML,
	338	NALNUM, NALNUML,
	339	SPACE, SPACEL,
	340	NSPACE, NSPACEL,
	341	DIGIT, NDIGIT,
	342	0
c277df42	343	};
	344	#endif
	345
73c4f7a1	346	END_EXTERN_C
cad2e5aa	347
	348	typedef struct re_scream_pos_data_s
	349	{
	350	char *scream_olds; / match pos */
	351	I32 scream_pos; / Internal iterator of scream. */
	352	} re_scream_pos_data;
	353
261faec3	354	/* .what is a character array with one character for each member of .data
	355	* The character describes the function of the corresponding .data item:
	356	* f - start-class data for regstclass optimization
	357	* n - Root of op tree for (?{EVAL}) item
	358	* o - Start op for (?{EVAL}) item
	359	* p - Pad for (?{EVAL} item
	360	* s - swash for unicode-style character class
	361	* 20010712 mjd@plover.com
c3613ed7	362	* (Remember to update re_dup() and pregfree() if you add any items.)
261faec3	363	*/
cad2e5aa	364	struct reg_data {
	365	U32 count;
	366	U8 *what;
	367	void* data[1];
	368	};
	369
	370	struct reg_substr_datum {
	371	I32 min_offset;
	372	I32 max_offset;
	373	SV *substr;
	374	};
	375
	376	struct reg_substr_data {
	377	struct reg_substr_datum data[3]; /* Actual array */
	378	};
	379
	380	#define anchored_substr substrs->data[0].substr
	381	#define anchored_offset substrs->data[0].min_offset
	382	#define float_substr substrs->data[1].substr
	383	#define float_min_offset substrs->data[1].min_offset
	384	#define float_max_offset substrs->data[1].max_offset
	385	#define check_substr substrs->data[2].substr
	386	#define check_offset_min substrs->data[2].min_offset
	387	#define check_offset_max substrs->data[2].max_offset