[perl5.git] / op.h

/*    op.h
 *
 *    Copyright (c) 1991-2002, 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.
 *
 */

/*
 * The fields of BASEOP are:
 *	op_next		Pointer to next ppcode to execute after this one.
 *			(Top level pre-grafted op points to first op,
 *			but this is replaced when op is grafted in, when
 *			this op will point to the real next op, and the new
 *			parent takes over role of remembering starting op.)
 *	op_ppaddr	Pointer to current ppcode's function.
 *	op_type		The type of the operation.
 *	op_flags	Flags common to all operations.  See OPf_* below.
 *	op_private	Flags peculiar to a particular operation (BUT,
 *			by default, set to the number of children until
 *			the operation is privatized by a check routine,
 *			which may or may not check number of children).
 */

#ifdef DEBUGGING_OPS
#define OPCODE opcode
#else
#define OPCODE U16
#endif

#ifdef BASEOP_DEFINITION
#define BASEOP BASEOP_DEFINITION
#else
#define BASEOP				\
    OP*		op_next;		\
    OP*		op_sibling;		\
    OP*		(CPERLscope(*op_ppaddr))(pTHX);		\
    PADOFFSET	op_targ;		\
    OPCODE	op_type;		\
    U16		op_seq;			\
    U8		op_flags;		\
    U8		op_private;
#endif

#define OP_GIMME(op,dfl) \
	(((op)->op_flags & OPf_WANT) == OPf_WANT_VOID   ? G_VOID   : \
	 ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
	 ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST   ? G_ARRAY   : \
	 dfl)

/*
=head1 "Gimme" Values

=for apidoc Amn|U32|GIMME_V
The XSUB-writer's equivalent to Perl's C<wantarray>.  Returns C<G_VOID>,
C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context,
respectively.

=for apidoc Amn|U32|GIMME
A backward-compatible version of C<GIMME_V> which can only return
C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>.
Deprecated.  Use C<GIMME_V> instead.

=cut
*/

#define GIMME_V		OP_GIMME(PL_op, block_gimme())

/* Public flags */

#define OPf_WANT	3	/* Mask for "want" bits: */
#define  OPf_WANT_VOID	 1	/*   Want nothing */
#define  OPf_WANT_SCALAR 2	/*   Want single value */
#define  OPf_WANT_LIST	 3	/*   Want list of any length */
#define OPf_KIDS	4	/* There is a firstborn child. */
#define OPf_PARENS	8	/* This operator was parenthesized. */
				/*  (Or block needs explicit scope entry.) */
#define OPf_REF		16	/* Certified reference. */
				/*  (Return container, not containee). */
#define OPf_MOD		32	/* Will modify (lvalue). */
#define OPf_STACKED	64	/* Some arg is arriving on the stack. */
#define OPf_SPECIAL	128	/* Do something weird for this op: */
				/*  On local LVAL, don't init local value. */
				/*  On OP_SORT, subroutine is inlined. */
				/*  On OP_NOT, inversion was implicit. */
				/*  On OP_LEAVE, don't restore curpm. */
				/*  On truncate, we truncate filehandle */
				/*  On control verbs, we saw no label */
				/*  On flipflop, we saw ... instead of .. */
				/*  On UNOPs, saw bare parens, e.g. eof(). */
				/*  On OP_ENTERSUB || OP_NULL, saw a "do". */
				/*  On OP_EXISTS, treat av as av, not avhv.  */
				/*  On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
				/*  On OP_ENTERITER, loop var is per-thread */
				/*  On pushre, re is /\s+/ imp. by split " " */
				/*  On regcomp, "use re 'eval'" was in scope */
				/*  On OP_READLINE, was <$filehandle> */
				/*  On RV2[SG]V, don't create GV--in defined()*/

/* old names; don't use in new code, but don't break them, either */
#define OPf_LIST	OPf_WANT_LIST
#define OPf_KNOW	OPf_WANT

#define GIMME \
	  (PL_op->op_flags & OPf_WANT					\
	   ? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST		\
	      ? G_ARRAY							\
	      : G_SCALAR)						\
	   : dowantarray())

/* NOTE: OP_NEXTSTATE, OP_DBSTATE, and OP_SETSTATE (i.e. COPs) carry lower
 * bits of PL_hints in op_private */

/* Private for lvalues */
#define OPpLVAL_INTRO	128	/* Lvalue must be localized or lvalue sub */

/* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */
#define OPpREFCOUNTED		64	/* op_targ carries a refcount */

/* Private for OP_AASSIGN */
#define OPpASSIGN_COMMON	64	/* Left & right have syms in common. */

/* Private for OP_SASSIGN */
#define OPpASSIGN_BACKWARDS	64	/* Left & right switched. */

/* Private for OP_MATCH and OP_SUBST{,CONST} */
#define OPpRUNTIME		64	/* Pattern coming in on the stack */

/* Private for OP_TRANS */
#define OPpTRANS_FROM_UTF	1
#define OPpTRANS_TO_UTF		2
#define OPpTRANS_IDENTICAL	4	/* right side is same as left */
#define OPpTRANS_SQUASH		8
#define OPpTRANS_DELETE		16
#define OPpTRANS_COMPLEMENT	32
#define OPpTRANS_GROWS		64

/* Private for OP_REPEAT */
#define OPpREPEAT_DOLIST	64	/* List replication. */

/* Private for OP_RV2?V, OP_?ELEM */
#define OPpDEREF		(32|64)	/* Want ref to something: */
#define OPpDEREF_AV		32	/*   Want ref to AV. */
#define OPpDEREF_HV		64	/*   Want ref to HV. */
#define OPpDEREF_SV		(32|64)	/*   Want ref to SV. */
  /* OP_ENTERSUB only */
#define OPpENTERSUB_DB		16	/* Debug subroutine. */
#define OPpENTERSUB_HASTARG	32	/* Called from OP tree. */
#define OPpENTERSUB_NOMOD	64	/* Immune to mod() for :attrlist. */
  /* OP_RV2CV only */
#define OPpENTERSUB_AMPER	8	/* Used & form to call. */
#define OPpENTERSUB_NOPAREN	128	/* bare sub call (without parens) */
#define OPpENTERSUB_INARGS	4	/* Lval used as arg to a sub. */
  /* OP_GV only */
#define OPpEARLY_CV		32	/* foo() called before sub foo was parsed */
  /* OP_?ELEM only */
#define OPpLVAL_DEFER		16	/* Defer creation of array/hash elem */
  /* OP_RV2?V, OP_GVSV only */
#define OPpOUR_INTRO		16	/* Variable was in an our() */
  /* OP_RV2[AH]V, OP_PAD[AH]V, OP_[AH]ELEM */
#define OPpMAYBE_LVSUB		8	/* We might be an lvalue to return */
  /* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */

/* Private for OPs with TARGLEX */
  /* (lower bits may carry MAXARG) */
#define OPpTARGET_MY		16	/* Target is PADMY. */

/* Private for OP_CONST */
#define	OPpCONST_STRICT		8	/* bearword subject to strict 'subs' */
#define OPpCONST_ENTERED	16	/* Has been entered as symbol. */
#define OPpCONST_ARYBASE	32	/* Was a $[ translated to constant. */
#define OPpCONST_BARE		64	/* Was a bare word (filehandle?). */
#define OPpCONST_WARNING	128	/* Was a $^W translated to constant. */

/* Private for OP_FLIP/FLOP */
#define OPpFLIP_LINENUM		64	/* Range arg potentially a line num. */

/* Private for OP_LIST */
#define OPpLIST_GUESSED		64	/* Guessed that pushmark was needed. */

/* Private for OP_DELETE */
#define OPpSLICE		64	/* Operating on a list of keys */

/* Private for OP_EXISTS */
#define OPpEXISTS_SUB		64	/* Checking for &sub, not {} or [].  */

/* Private for OP_SORT */
#define OPpSORT_NUMERIC		1	/* Optimized away { $a <=> $b } */
#define OPpSORT_INTEGER		2	/* Ditto while under "use integer" */
#define OPpSORT_REVERSE		4	/* Descending sort */
/* Private for OP_THREADSV */
#define OPpDONE_SVREF		64	/* Been through newSVREF once */

/* Private for OP_OPEN and OP_BACKTICK */
#define OPpOPEN_IN_RAW		16	/* binmode(F,":raw") on input fh */
#define OPpOPEN_IN_CRLF		32	/* binmode(F,":crlf") on input fh */
#define OPpOPEN_OUT_RAW		64	/* binmode(F,":raw") on output fh */
#define OPpOPEN_OUT_CRLF	128	/* binmode(F,":crlf") on output fh */

/* Private for OP_EXIT, HUSH also for OP_DIE */
#define OPpHUSH_VMSISH		64	/* hush DCL exit msg vmsish mode*/
#define OPpEXIT_VMSISH		128	/* exit(0) vs. exit(1) vmsish mode*/

struct op {
    BASEOP
};

struct unop {
    BASEOP
    OP *	op_first;
};

struct binop {
    BASEOP
    OP *	op_first;
    OP *	op_last;
};

struct logop {
    BASEOP
    OP *	op_first;
    OP *	op_other;
};

struct listop {
    BASEOP
    OP *	op_first;
    OP *	op_last;
};

struct pmop {
    BASEOP
    OP *	op_first;
    OP *	op_last;
    OP *	op_pmreplroot;
    OP *	op_pmreplstart;
    PMOP *	op_pmnext;		/* list of all scanpats */
#ifdef USE_ITHREADS
    IV          op_pmoffset;
#else
    REGEXP *    op_pmregexp;            /* compiled expression */
#endif
    U32		op_pmflags;
    U32		op_pmpermflags;
    U8		op_pmdynflags;
#ifdef USE_ITHREADS
    char *	op_pmstashpv;
#else
    HV *	op_pmstash;
#endif
};

#ifdef USE_ITHREADS
#define PM_GETRE(o)     (INT2PTR(REGEXP*,SvIVX(PL_regex_pad[(o)->op_pmoffset])))
#define PM_SETRE(o,r)   STMT_START { SV* sv = PL_regex_pad[(o)->op_pmoffset]; sv_setiv(sv, PTR2IV(r)); } STMT_END
#define PM_GETRE_SAFE(o) (PL_regex_pad ? PM_GETRE(o) : (REGEXP*)0)
#define PM_SETRE_SAFE(o,r) if (PL_regex_pad) PM_SETRE(o,r)
#else
#define PM_GETRE(o)     ((o)->op_pmregexp)
#define PM_SETRE(o,r)   ((o)->op_pmregexp = (r))
#define PM_GETRE_SAFE PM_GETRE
#define PM_SETRE_SAFE PM_SETRE
#endif

#define PMdf_USED	0x01		/* pm has been used once already */
#define PMdf_TAINTED	0x02		/* pm compiled from tainted pattern */
#define PMdf_UTF8	0x04		/* pm compiled from utf8 data */
#define PMdf_DYN_UTF8	0x08

#define PMdf_CMP_UTF8	(PMdf_UTF8|PMdf_DYN_UTF8)

#define PMf_RETAINT	0x0001		/* taint $1 etc. if target tainted */
#define PMf_ONCE	0x0002		/* use pattern only once per reset */
#define PMf_UNUSED	0x0004		/* free for use */
#define PMf_MAYBE_CONST	0x0008		/* replacement contains variables */
#define PMf_SKIPWHITE	0x0010		/* skip leading whitespace for split */
#define PMf_WHITE	0x0020		/* pattern is \s+ */
#define PMf_CONST	0x0040		/* subst replacement is constant */
#define PMf_KEEP	0x0080		/* keep 1st runtime pattern forever */
#define PMf_GLOBAL	0x0100		/* pattern had a g modifier */
#define PMf_CONTINUE	0x0200		/* don't reset pos() if //g fails */
#define PMf_EVAL	0x0400		/* evaluating replacement as expr */
#define PMf_LOCALE	0x0800		/* use locale for character types */
#define PMf_MULTILINE	0x1000		/* assume multiple lines */
#define PMf_SINGLELINE	0x2000		/* assume single line */
#define PMf_FOLD	0x4000		/* case insensitivity */
#define PMf_EXTENDED	0x8000		/* chuck embedded whitespace */

/* mask of bits stored in regexp->reganch */
#define PMf_COMPILETIME	(PMf_MULTILINE|PMf_SINGLELINE|PMf_LOCALE|PMf_FOLD|PMf_EXTENDED)

#ifdef USE_ITHREADS

#  define PmopSTASHPV(o)	((o)->op_pmstashpv)
#  define PmopSTASHPV_set(o,pv)	(PmopSTASHPV(o) = savesharedpv(pv))
#  define PmopSTASH(o)		(PmopSTASHPV(o) \
				 ? gv_stashpv(PmopSTASHPV(o),GV_ADD) : Nullhv)
#  define PmopSTASH_set(o,hv)	PmopSTASHPV_set(o, ((hv) ? HvNAME(hv) : Nullch))
#  define PmopSTASH_free(o)	PerlMemShared_free(PmopSTASHPV(o))

#else
#  define PmopSTASH(o)		((o)->op_pmstash)
#  define PmopSTASH_set(o,hv)	((o)->op_pmstash = (hv))
#  define PmopSTASHPV(o)	(PmopSTASH(o) ? HvNAME(PmopSTASH(o)) : Nullch)
   /* op_pmstash is not refcounted */
#  define PmopSTASHPV_set(o,pv)	PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
#  define PmopSTASH_free(o)    
#endif

struct svop {
    BASEOP
    SV *	op_sv;
};

struct padop {
    BASEOP
    PADOFFSET	op_padix;
};

struct pvop {
    BASEOP
    char *	op_pv;
};

struct loop {
    BASEOP
    OP *	op_first;
    OP *	op_last;
    OP *	op_redoop;
    OP *	op_nextop;
    OP *	op_lastop;
};

#define cUNOPx(o)	((UNOP*)o)
#define cBINOPx(o)	((BINOP*)o)
#define cLISTOPx(o)	((LISTOP*)o)
#define cLOGOPx(o)	((LOGOP*)o)
#define cPMOPx(o)	((PMOP*)o)
#define cSVOPx(o)	((SVOP*)o)
#define cPADOPx(o)	((PADOP*)o)
#define cPVOPx(o)	((PVOP*)o)
#define cCOPx(o)	((COP*)o)
#define cLOOPx(o)	((LOOP*)o)

#define cUNOP		cUNOPx(PL_op)
#define cBINOP		cBINOPx(PL_op)
#define cLISTOP		cLISTOPx(PL_op)
#define cLOGOP		cLOGOPx(PL_op)
#define cPMOP		cPMOPx(PL_op)
#define cSVOP		cSVOPx(PL_op)
#define cPADOP		cPADOPx(PL_op)
#define cPVOP		cPVOPx(PL_op)
#define cCOP		cCOPx(PL_op)
#define cLOOP		cLOOPx(PL_op)

#define cUNOPo		cUNOPx(o)
#define cBINOPo		cBINOPx(o)
#define cLISTOPo	cLISTOPx(o)
#define cLOGOPo		cLOGOPx(o)
#define cPMOPo		cPMOPx(o)
#define cSVOPo		cSVOPx(o)
#define cPADOPo		cPADOPx(o)
#define cPVOPo		cPVOPx(o)
#define cCOPo		cCOPx(o)
#define cLOOPo		cLOOPx(o)

#define kUNOP		cUNOPx(kid)
#define kBINOP		cBINOPx(kid)
#define kLISTOP		cLISTOPx(kid)
#define kLOGOP		cLOGOPx(kid)
#define kPMOP		cPMOPx(kid)
#define kSVOP		cSVOPx(kid)
#define kPADOP		cPADOPx(kid)
#define kPVOP		cPVOPx(kid)
#define kCOP		cCOPx(kid)
#define kLOOP		cLOOPx(kid)


#ifdef USE_ITHREADS
#  define	cGVOPx_gv(o)	((GV*)PAD_SVl(cPADOPx(o)->op_padix))
#  define	IS_PADGV(v)	(v && SvTYPE(v) == SVt_PVGV && GvIN_PAD(v))
#  define	IS_PADCONST(v)	(v && SvREADONLY(v))
#  define	cSVOPx_sv(v)	(cSVOPx(v)->op_sv \
				 ? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ))
#  define	cSVOPx_svp(v)	(cSVOPx(v)->op_sv \
				 ? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ))
#else
#  define	cGVOPx_gv(o)	((GV*)cSVOPx(o)->op_sv)
#  define	IS_PADGV(v)	FALSE
#  define	IS_PADCONST(v)	FALSE
#  define	cSVOPx_sv(v)	(cSVOPx(v)->op_sv)
#  define	cSVOPx_svp(v)	(&cSVOPx(v)->op_sv)
#endif

#define	cGVOP_gv		cGVOPx_gv(PL_op)
#define	cGVOPo_gv		cGVOPx_gv(o)
#define	kGVOP_gv		cGVOPx_gv(kid)
#define cSVOP_sv		cSVOPx_sv(PL_op)
#define cSVOPo_sv		cSVOPx_sv(o)
#define kSVOP_sv		cSVOPx_sv(kid)

#define Nullop Null(OP*)

/* Lowest byte-and-a-bit of PL_opargs */
#define OA_MARK 1
#define OA_FOLDCONST 2
#define OA_RETSCALAR 4
#define OA_TARGET 8
#define OA_RETINTEGER 16
#define OA_OTHERINT 32
#define OA_DANGEROUS 64
#define OA_DEFGV 128
#define OA_TARGLEX 256

/* The next 4 bits encode op class information */
#define OCSHIFT 9

#define OA_CLASS_MASK (15 << OCSHIFT)

#define OA_BASEOP (0 << OCSHIFT)
#define OA_UNOP (1 << OCSHIFT)
#define OA_BINOP (2 << OCSHIFT)
#define OA_LOGOP (3 << OCSHIFT)
#define OA_LISTOP (4 << OCSHIFT)
#define OA_PMOP (5 << OCSHIFT)
#define OA_SVOP (6 << OCSHIFT)
#define OA_PADOP (7 << OCSHIFT)
#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
#define OA_LOOP (9 << OCSHIFT)
#define OA_COP (10 << OCSHIFT)
#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
#define OA_FILESTATOP (12 << OCSHIFT)
#define OA_LOOPEXOP (13 << OCSHIFT)

#define OASHIFT 13

/* Remaining nybbles of PL_opargs */
#define OA_SCALAR 1
#define OA_LIST 2
#define OA_AVREF 3
#define OA_HVREF 4
#define OA_CVREF 5
#define OA_FILEREF 6
#define OA_SCALARREF 7
#define OA_OPTIONAL 8

#ifdef USE_ITHREADS
#  define OP_REFCNT_INIT		MUTEX_INIT(&PL_op_mutex)
#  define OP_REFCNT_LOCK		MUTEX_LOCK(&PL_op_mutex)
#  define OP_REFCNT_UNLOCK		MUTEX_UNLOCK(&PL_op_mutex)
#  define OP_REFCNT_TERM		MUTEX_DESTROY(&PL_op_mutex)
#else
#  define OP_REFCNT_INIT		NOOP
#  define OP_REFCNT_LOCK		NOOP
#  define OP_REFCNT_UNLOCK		NOOP
#  define OP_REFCNT_TERM		NOOP
#endif

#define OpREFCNT_set(o,n)		((o)->op_targ = (n))
#define OpREFCNT_inc(o)			((o) ? (++(o)->op_targ, (o)) : Nullop)
#define OpREFCNT_dec(o)			(--(o)->op_targ)

/* flags used by Perl_load_module() */
#define PERL_LOADMOD_DENY		0x1
#define PERL_LOADMOD_NOIMPORT		0x2
#define PERL_LOADMOD_IMPORT_OPS		0x4

#ifdef USE_REENTRANT_API
#include "reentr.h"
#endif
Commit	Line	Data
a0d0e21e	1	/* op.h
79072805	2	*
be3c0a43	3	* Copyright (c) 1991-2002, Larry Wall
79072805 LW	4	*
	5	* You may distribute under the terms of either the GNU General Public
	6	* License or the Artistic License, as specified in the README file.
	7	*
79072805 LW	8	*/
	9
	10	/*
	11	* The fields of BASEOP are:
	12	* op_next Pointer to next ppcode to execute after this one.
	13	* (Top level pre-grafted op points to first op,
	14	* but this is replaced when op is grafted in, when
	15	* this op will point to the real next op, and the new
	16	* parent takes over role of remembering starting op.)
	17	* op_ppaddr Pointer to current ppcode's function.
	18	* op_type The type of the operation.
	19	* op_flags Flags common to all operations. See OPf_* below.
	20	* op_private Flags peculiar to a particular operation (BUT,
	21	* by default, set to the number of children until
	22	* the operation is privatized by a check routine,
	23	* which may or may not check number of children).
	24	*/
	25
4633a7c4	26	#ifdef DEBUGGING_OPS
79072805 LW	27	#define OPCODE opcode
	28	#else
	29	#define OPCODE U16
	30	#endif
	31
0f4eea8f DL	32	#ifdef BASEOP_DEFINITION
	33	#define BASEOP BASEOP_DEFINITION
	34	#else
79072805 LW	35	#define BASEOP \
	36	OP* op_next; \
	37	OP* op_sibling; \
4f63d024	38	OP* (CPERLscope(*op_ppaddr))(pTHX); \
79072805 LW	39	PADOFFSET op_targ; \
	40	OPCODE op_type; \
	41	U16 op_seq; \
a0d0e21e LW	42	U8 op_flags; \
a0d0e21e LW	43	U8 op_private;
0f4eea8f	44	#endif
79072805	45
54310121	46	#define OP_GIMME(op,dfl) \
	47	(((op)->op_flags & OPf_WANT) == OPf_WANT_VOID ? G_VOID : \
	48	((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
	49	((op)->op_flags & OPf_WANT) == OPf_WANT_LIST ? G_ARRAY : \
	50	dfl)
	51
954c1994	52	/*
ccfc67b7 JH	53	=head1 "Gimme" Values
ccfc67b7 JH	54
954c1994 GS	55	=for apidoc Amn\|U32\|GIMME_V
954c1994 GS	56	The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
91e74348	57	C<G_SCALAR> or C<G_ARRAY> for void, scalar or list context,
954c1994 GS	58	respectively.
	59
	60	=for apidoc Amn\|U32\|GIMME
	61	A backward-compatible version of C<GIMME_V> which can only return
	62	C<G_SCALAR> or C<G_ARRAY>; in a void context, it returns C<G_SCALAR>.
	63	Deprecated. Use C<GIMME_V> instead.
	64
	65	=cut
	66	*/
	67
533c011a	68	#define GIMME_V OP_GIMME(PL_op, block_gimme())
79072805 LW	69
79072805 LW	70	/* Public flags */
54310121	71
	72	#define OPf_WANT 3 /* Mask for "want" bits: */
	73	#define OPf_WANT_VOID 1 /* Want nothing */
	74	#define OPf_WANT_SCALAR 2 /* Want single value */
	75	#define OPf_WANT_LIST 3 /* Want list of any length */
79072805 LW	76	#define OPf_KIDS 4 /* There is a firstborn child. */
79072805 LW	77	#define OPf_PARENS 8 /* This operator was parenthesized. */
463ee0b2	78	/* (Or block needs explicit scope entry.) */
a0d0e21e LW	79	#define OPf_REF 16 /* Certified reference. */
	80	/* (Return container, not containee). */
	81	#define OPf_MOD 32 /* Will modify (lvalue). */
	82	#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
79072805 LW	83	#define OPf_SPECIAL 128 /* Do something weird for this op: */
	84	/* On local LVAL, don't init local value. */
	85	/* On OP_SORT, subroutine is inlined. */
	86	/* On OP_NOT, inversion was implicit. */
a0d0e21e	87	/* On OP_LEAVE, don't restore curpm. */
79072805 LW	88	/* On truncate, we truncate filehandle */
	89	/* On control verbs, we saw no label */
	90	/* On flipflop, we saw ... instead of .. */
	91	/* On UNOPs, saw bare parens, e.g. eof(). */
a0d0e21e	92	/* On OP_ENTERSUB \|\| OP_NULL, saw a "do". */
afebc493	93	/* On OP_EXISTS, treat av as av, not avhv. */
f2ec2afd	94	/* On OP_(ENTER\|LEAVE)EVAL, don't clear $@ */
54b9620d	95	/* On OP_ENTERITER, loop var is per-thread */
497711e7 GS	96	/* On pushre, re is /\s+/ imp. by split " " */
497711e7 GS	97	/* On regcomp, "use re 'eval'" was in scope */
7c6fadd6	98	/* On OP_READLINE, was <$filehandle> */
4e3399f9	99	/* On RV2[SG]V, don't create GV--in defined()*/
79072805	100
54310121	101	/* old names; don't use in new code, but don't break them, either */
d91ab173 GS	102	#define OPf_LIST OPf_WANT_LIST
d91ab173 GS	103	#define OPf_KNOW OPf_WANT
954c1994	104
54310121	105	#define GIMME \
62a559b8 NIS	106	(PL_op->op_flags & OPf_WANT \
62a559b8 NIS	107	? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
d91ab173 GS	108	? G_ARRAY \
	109	: G_SCALAR) \
	110	: dowantarray())
54310121	111
d41ff1b8 GS	112	/* NOTE: OP_NEXTSTATE, OP_DBSTATE, and OP_SETSTATE (i.e. COPs) carry lower
	113	* bits of PL_hints in op_private */
	114
a0d0e21e	115	/* Private for lvalues */
cd06dffe	116	#define OPpLVAL_INTRO 128 /* Lvalue must be localized or lvalue sub */
a0d0e21e	117
7934575e GS	118	/* Private for OP_LEAVE, OP_LEAVESUB, OP_LEAVESUBLV and OP_LEAVEWRITE */
	119	#define OPpREFCOUNTED 64 /* op_targ carries a refcount */
	120
a0d0e21e LW	121	/* Private for OP_AASSIGN */
	122	#define OPpASSIGN_COMMON 64 /* Left & right have syms in common. */
	123
	124	/* Private for OP_SASSIGN */
	125	#define OPpASSIGN_BACKWARDS 64 /* Left & right switched. */
79072805	126
c90c0ff4	127	/* Private for OP_MATCH and OP_SUBST{,CONST} */
	128	#define OPpRUNTIME 64 /* Pattern coming in on the stack */
	129
79072805	130	/* Private for OP_TRANS */
4757a243 LW	131	#define OPpTRANS_FROM_UTF 1
4757a243 LW	132	#define OPpTRANS_TO_UTF 2
383e7cdd	133	#define OPpTRANS_IDENTICAL 4 /* right side is same as left */
4757a243 LW	134	#define OPpTRANS_SQUASH 8
	135	#define OPpTRANS_DELETE 16
	136	#define OPpTRANS_COMPLEMENT 32
	137	#define OPpTRANS_GROWS 64
79072805 LW	138
79072805 LW	139	/* Private for OP_REPEAT */
a0d0e21e	140	#define OPpREPEAT_DOLIST 64 /* List replication. */
79072805	141
d3011074	142	/* Private for OP_RV2?V, OP_?ELEM */
5f05dabc	143	#define OPpDEREF (32\|64) /* Want ref to something: */
	144	#define OPpDEREF_AV 32 /* Want ref to AV. */
	145	#define OPpDEREF_HV 64 /* Want ref to HV. */
	146	#define OPpDEREF_SV (32\|64) /* Want ref to SV. */
68dc0745	147	/* OP_ENTERSUB only */
68dc0745	148	#define OPpENTERSUB_DB 16 /* Debug subroutine. */
d3011074	149	#define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */
95f0a2f1	150	#define OPpENTERSUB_NOMOD 64 /* Immune to mod() for :attrlist. */
7a52d87a	151	/* OP_RV2CV only */
68dc0745	152	#define OPpENTERSUB_AMPER 8 /* Used & form to call. */
9675f7ac	153	#define OPpENTERSUB_NOPAREN 128 /* bare sub call (without parens) */
cd06dffe	154	#define OPpENTERSUB_INARGS 4 /* Lval used as arg to a sub. */
76cd736e GS	155	/* OP_GV only */
76cd736e GS	156	#define OPpEARLY_CV 32 /* foo() called before sub foo was parsed */
68dc0745	157	/* OP_?ELEM only */
68dc0745	158	#define OPpLVAL_DEFER 16 /* Defer creation of array/hash elem */
64aac5a9	159	/* OP_RV2?V, OP_GVSV only */
78f9721b SM	160	#define OPpOUR_INTRO 16 /* Variable was in an our() */
	161	/* OP_RV2[AH]V, OP_PAD[AH]V, OP_[AH]ELEM */
	162	#define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */
192587c2	163	/* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */
79072805	164
b162f9ea IZ	165	/* Private for OPs with TARGLEX */
	166	/* (lower bits may carry MAXARG) */
	167	#define OPpTARGET_MY 16 /* Target is PADMY. */
	168
79072805	169	/* Private for OP_CONST */
7a52d87a	170	#define OPpCONST_STRICT 8 /* bearword subject to strict 'subs' */
748a9306 LW	171	#define OPpCONST_ENTERED 16 /* Has been entered as symbol. */
748a9306 LW	172	#define OPpCONST_ARYBASE 32 /* Was a $[ translated to constant. */
a0d0e21e	173	#define OPpCONST_BARE 64 /* Was a bare word (filehandle?). */
599cee73	174	#define OPpCONST_WARNING 128 /* Was a $^W translated to constant. */
79072805 LW	175
79072805 LW	176	/* Private for OP_FLIP/FLOP */
a0d0e21e	177	#define OPpFLIP_LINENUM 64 /* Range arg potentially a line num. */
79072805	178
ed6116ce	179	/* Private for OP_LIST */
a0d0e21e LW	180	#define OPpLIST_GUESSED 64 /* Guessed that pushmark was needed. */
a0d0e21e LW	181
5f05dabc	182	/* Private for OP_DELETE */
54310121	183	#define OPpSLICE 64 /* Operating on a list of keys */
5f05dabc	184
afebc493 GS	185	/* Private for OP_EXISTS */
	186	#define OPpEXISTS_SUB 64 /* Checking for &sub, not {} or []. */
	187
9c007264 JH	188	/* Private for OP_SORT */
	189	#define OPpSORT_NUMERIC 1 /* Optimized away { $a <=> $b } */
	190	#define OPpSORT_INTEGER 2 /* Ditto while under "use integer" */
	191	#define OPpSORT_REVERSE 4 /* Descending sort */
224a4551 MB	192	/* Private for OP_THREADSV */
224a4551 MB	193	#define OPpDONE_SVREF 64 /* Been through newSVREF once */
554b3eca	194
16fe6d59 GS	195	/* Private for OP_OPEN and OP_BACKTICK */
	196	#define OPpOPEN_IN_RAW 16 /* binmode(F,":raw") on input fh */
	197	#define OPpOPEN_IN_CRLF 32 /* binmode(F,":crlf") on input fh */
	198	#define OPpOPEN_OUT_RAW 64 /* binmode(F,":raw") on output fh */
	199	#define OPpOPEN_OUT_CRLF 128 /* binmode(F,":crlf") on output fh */
	200
96e176bf CL	201	/* Private for OP_EXIT, HUSH also for OP_DIE */
96e176bf CL	202	#define OPpHUSH_VMSISH 64 /* hush DCL exit msg vmsish mode*/
d98f61e7 GS	203	#define OPpEXIT_VMSISH 128 /* exit(0) vs. exit(1) vmsish mode*/
d98f61e7 GS	204
79072805 LW	205	struct op {
	206	BASEOP
	207	};
	208
	209	struct unop {
	210	BASEOP
	211	OP * op_first;
	212	};
	213
	214	struct binop {
	215	BASEOP
	216	OP * op_first;
	217	OP * op_last;
	218	};
	219
	220	struct logop {
	221	BASEOP
	222	OP * op_first;
	223	OP * op_other;
	224	};
	225
79072805 LW	226	struct listop {
	227	BASEOP
	228	OP * op_first;
	229	OP * op_last;
79072805 LW	230	};
	231
	232	struct pmop {
	233	BASEOP
	234	OP * op_first;
	235	OP * op_last;
79072805 LW	236	OP * op_pmreplroot;
	237	OP * op_pmreplstart;
	238	PMOP * op_pmnext; /* list of all scanpats */
1fcf4c12	239	#ifdef USE_ITHREADS
fd1bc7eb	240	IV op_pmoffset;
1fcf4c12 AB	241	#else
	242	REGEXP * op_pmregexp; /* compiled expression */
	243	#endif
699a3330	244	U32 op_pmflags;
e2509266	245	U32 op_pmpermflags;
48c036b1	246	U8 op_pmdynflags;
cb55de95 JH	247	#ifdef USE_ITHREADS
	248	char * op_pmstashpv;
	249	#else
	250	HV * op_pmstash;
	251	#endif
79072805	252	};
a0d0e21e	253
1fcf4c12	254	#ifdef USE_ITHREADS
ba89bb6e	255	#define PM_GETRE(o) (INT2PTR(REGEXP*,SvIVX(PL_regex_pad[(o)->op_pmoffset])))
dd7d6c2b	256	#define PM_SETRE(o,r) STMT_START { SV* sv = PL_regex_pad[(o)->op_pmoffset]; sv_setiv(sv, PTR2IV(r)); } STMT_END
5f8cb046 DM	257	#define PM_GETRE_SAFE(o) (PL_regex_pad ? PM_GETRE(o) : (REGEXP*)0)
5f8cb046 DM	258	#define PM_SETRE_SAFE(o,r) if (PL_regex_pad) PM_SETRE(o,r)
1fcf4c12	259	#else
b9ed2502 AB	260	#define PM_GETRE(o) ((o)->op_pmregexp)
b9ed2502 AB	261	#define PM_SETRE(o,r) ((o)->op_pmregexp = (r))
5f8cb046 DM	262	#define PM_GETRE_SAFE PM_GETRE
5f8cb046 DM	263	#define PM_SETRE_SAFE PM_SETRE
1fcf4c12	264	#endif
4825b64b	265
48c036b1	266	#define PMdf_USED 0x01 /* pm has been used once already */
b3eb6a9b	267	#define PMdf_TAINTED 0x02 /* pm compiled from tainted pattern */
84e09d5e JH	268	#define PMdf_UTF8 0x04 /* pm compiled from utf8 data */
	269	#define PMdf_DYN_UTF8 0x08
	270
	271	#define PMdf_CMP_UTF8 (PMdf_UTF8\|PMdf_DYN_UTF8)
48c036b1	272
b3eb6a9b	273	#define PMf_RETAINT 0x0001 /* taint $1 etc. if target tainted */
a0d0e21e	274	#define PMf_ONCE 0x0002 /* use pattern only once per reset */
699a3330	275	#define PMf_UNUSED 0x0004 /* free for use */
ce862d02	276	#define PMf_MAYBE_CONST 0x0008 /* replacement contains variables */
a0d0e21e	277	#define PMf_SKIPWHITE 0x0010 /* skip leading whitespace for split */
8782bef2	278	#define PMf_WHITE 0x0020 /* pattern is \s+ */
a0d0e21e LW	279	#define PMf_CONST 0x0040 /* subst replacement is constant */
	280	#define PMf_KEEP 0x0080 /* keep 1st runtime pattern forever */
	281	#define PMf_GLOBAL 0x0100 /* pattern had a g modifier */
c90c0ff4	282	#define PMf_CONTINUE 0x0200 /* don't reset pos() if //g fails */
a0d0e21e	283	#define PMf_EVAL 0x0400 /* evaluating replacement as expr */
8782bef2	284	#define PMf_LOCALE 0x0800 /* use locale for character types */
a0d0e21e LW	285	#define PMf_MULTILINE 0x1000 /* assume multiple lines */
a0d0e21e LW	286	#define PMf_SINGLELINE 0x2000 /* assume single line */
8782bef2	287	#define PMf_FOLD 0x4000 /* case insensitivity */
a0d0e21e	288	#define PMf_EXTENDED 0x8000 /* chuck embedded whitespace */
79072805	289
8782bef2 GB	290	/* mask of bits stored in regexp->reganch */
	291	#define PMf_COMPILETIME (PMf_MULTILINE\|PMf_SINGLELINE\|PMf_LOCALE\|PMf_FOLD\|PMf_EXTENDED)
	292
cb55de95	293	#ifdef USE_ITHREADS
05ec9bb3	294
cb55de95	295	# define PmopSTASHPV(o) ((o)->op_pmstashpv)
05ec9bb3	296	# define PmopSTASHPV_set(o,pv) (PmopSTASHPV(o) = savesharedpv(pv))
cb55de95 JH	297	# define PmopSTASH(o) (PmopSTASHPV(o) \
cb55de95 JH	298	? gv_stashpv(PmopSTASHPV(o),GV_ADD) : Nullhv)
05ec9bb3 NIS	299	# define PmopSTASH_set(o,hv) PmopSTASHPV_set(o, ((hv) ? HvNAME(hv) : Nullch))
	300	# define PmopSTASH_free(o) PerlMemShared_free(PmopSTASHPV(o))
	301
cb55de95 JH	302	#else
	303	# define PmopSTASH(o) ((o)->op_pmstash)
	304	# define PmopSTASH_set(o,hv) ((o)->op_pmstash = (hv))
	305	# define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME(PmopSTASH(o)) : Nullch)
	306	/* op_pmstash is not refcounted */
	307	# define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
05ec9bb3	308	# define PmopSTASH_free(o)
cb55de95 JH	309	#endif
cb55de95 JH	310
79072805 LW	311	struct svop {
	312	BASEOP
	313	SV * op_sv;
	314	};
	315
7934575e	316	struct padop {
79072805	317	BASEOP
7934575e	318	PADOFFSET op_padix;
79072805 LW	319	};
	320
	321	struct pvop {
	322	BASEOP
	323	char * op_pv;
	324	};
	325
79072805 LW	326	struct loop {
	327	BASEOP
	328	OP * op_first;
	329	OP * op_last;
79072805 LW	330	OP * op_redoop;
	331	OP * op_nextop;
	332	OP * op_lastop;
	333	};
	334
350de78d GS	335	#define cUNOPx(o) ((UNOP*)o)
	336	#define cBINOPx(o) ((BINOP*)o)
	337	#define cLISTOPx(o) ((LISTOP*)o)
	338	#define cLOGOPx(o) ((LOGOP*)o)
	339	#define cPMOPx(o) ((PMOP*)o)
	340	#define cSVOPx(o) ((SVOP*)o)
	341	#define cPADOPx(o) ((PADOP*)o)
	342	#define cPVOPx(o) ((PVOP*)o)
	343	#define cCOPx(o) ((COP*)o)
	344	#define cLOOPx(o) ((LOOP*)o)
	345
	346	#define cUNOP cUNOPx(PL_op)
	347	#define cBINOP cBINOPx(PL_op)
	348	#define cLISTOP cLISTOPx(PL_op)
	349	#define cLOGOP cLOGOPx(PL_op)
	350	#define cPMOP cPMOPx(PL_op)
	351	#define cSVOP cSVOPx(PL_op)
	352	#define cPADOP cPADOPx(PL_op)
	353	#define cPVOP cPVOPx(PL_op)
	354	#define cCOP cCOPx(PL_op)
	355	#define cLOOP cLOOPx(PL_op)
	356
	357	#define cUNOPo cUNOPx(o)
	358	#define cBINOPo cBINOPx(o)
	359	#define cLISTOPo cLISTOPx(o)
	360	#define cLOGOPo cLOGOPx(o)
	361	#define cPMOPo cPMOPx(o)
	362	#define cSVOPo cSVOPx(o)
	363	#define cPADOPo cPADOPx(o)
	364	#define cPVOPo cPVOPx(o)
	365	#define cCOPo cCOPx(o)
	366	#define cLOOPo cLOOPx(o)
	367
	368	#define kUNOP cUNOPx(kid)
	369	#define kBINOP cBINOPx(kid)
	370	#define kLISTOP cLISTOPx(kid)
	371	#define kLOGOP cLOGOPx(kid)
	372	#define kPMOP cPMOPx(kid)
	373	#define kSVOP cSVOPx(kid)
	374	#define kPADOP cPADOPx(kid)
	375	#define kPVOP cPVOPx(kid)
	376	#define kCOP cCOPx(kid)
	377	#define kLOOP cLOOPx(kid)
	378
	379
	380	#ifdef USE_ITHREADS
dd2155a4	381	# define cGVOPx_gv(o) ((GV*)PAD_SVl(cPADOPx(o)->op_padix))
743e66e6	382	# define IS_PADGV(v) (v && SvTYPE(v) == SVt_PVGV && GvIN_PAD(v))
7766f137 GS	383	# define IS_PADCONST(v) (v && SvREADONLY(v))
7766f137 GS	384	# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
dd2155a4	385	? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ))
638eceb6	386	# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
dd2155a4	387	? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ))
350de78d	388	#else
638eceb6	389	# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
743e66e6	390	# define IS_PADGV(v) FALSE
7766f137 GS	391	# define IS_PADCONST(v) FALSE
7766f137 GS	392	# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
638eceb6	393	# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
350de78d	394	#endif
79072805	395
638eceb6 GS	396	#define cGVOP_gv cGVOPx_gv(PL_op)
	397	#define cGVOPo_gv cGVOPx_gv(o)
	398	#define kGVOP_gv cGVOPx_gv(kid)
	399	#define cSVOP_sv cSVOPx_sv(PL_op)
	400	#define cSVOPo_sv cSVOPx_sv(o)
	401	#define kSVOP_sv cSVOPx_sv(kid)
7766f137	402
79072805 LW	403	#define Nullop Null(OP*)
79072805 LW	404
91135acb	405	/* Lowest byte-and-a-bit of PL_opargs */
a0d0e21e LW	406	#define OA_MARK 1
	407	#define OA_FOLDCONST 2
	408	#define OA_RETSCALAR 4
	409	#define OA_TARGET 8
	410	#define OA_RETINTEGER 16
	411	#define OA_OTHERINT 32
	412	#define OA_DANGEROUS 64
	413	#define OA_DEFGV 128
b162f9ea	414	#define OA_TARGLEX 256
a0d0e21e	415
db173bac	416	/* The next 4 bits encode op class information */
b162f9ea IZ	417	#define OCSHIFT 9
	418
	419	#define OA_CLASS_MASK (15 << OCSHIFT)
	420
	421	#define OA_BASEOP (0 << OCSHIFT)
	422	#define OA_UNOP (1 << OCSHIFT)
	423	#define OA_BINOP (2 << OCSHIFT)
	424	#define OA_LOGOP (3 << OCSHIFT)
1a67a97c SM	425	#define OA_LISTOP (4 << OCSHIFT)
	426	#define OA_PMOP (5 << OCSHIFT)
	427	#define OA_SVOP (6 << OCSHIFT)
7934575e	428	#define OA_PADOP (7 << OCSHIFT)
1a67a97c SM	429	#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
	430	#define OA_LOOP (9 << OCSHIFT)
	431	#define OA_COP (10 << OCSHIFT)
	432	#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
	433	#define OA_FILESTATOP (12 << OCSHIFT)
	434	#define OA_LOOPEXOP (13 << OCSHIFT)
b162f9ea IZ	435
b162f9ea IZ	436	#define OASHIFT 13
a0d0e21e	437
4369b173	438	/* Remaining nybbles of PL_opargs */
a0d0e21e LW	439	#define OA_SCALAR 1
	440	#define OA_LIST 2
	441	#define OA_AVREF 3
	442	#define OA_HVREF 4
	443	#define OA_CVREF 5
	444	#define OA_FILEREF 6
	445	#define OA_SCALARREF 7
	446	#define OA_OPTIONAL 8
	447
534825c4 GS	448	#ifdef USE_ITHREADS
	449	# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
	450	# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
	451	# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
	452	# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
534825c4 GS	453	#else
	454	# define OP_REFCNT_INIT NOOP
	455	# define OP_REFCNT_LOCK NOOP
	456	# define OP_REFCNT_UNLOCK NOOP
	457	# define OP_REFCNT_TERM NOOP
534825c4	458	#endif
e4783991	459
282f25c9 JH	460	#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
	461	#define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : Nullop)
	462	#define OpREFCNT_dec(o) (--(o)->op_targ)
	463
e4783991 GS	464	/* flags used by Perl_load_module() */
	465	#define PERL_LOADMOD_DENY 0x1
	466	#define PERL_LOADMOD_NOIMPORT 0x2
	467	#define PERL_LOADMOD_IMPORT_OPS 0x4
e5dd39fc AB	468
e5dd39fc AB	469	#ifdef USE_REENTRANT_API
10bc17b6	470	#include "reentr.h"
e5dd39fc AB	471	#endif
e5dd39fc AB	472