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/* op.h
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
*
* 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_opt Whether or not the op has been optimised by the
* peephole optimiser.
*
* See the comments in S_clear_yystack() for more
* details on the following three flags:
*
* op_latefree tell op_free() to clear this op (and free any kids)
* but not yet deallocate the struct. This means that
* the op may be safely op_free()d multiple times
* op_latefreed an op_latefree op has been op_free()d
* op_attached this op (sub)tree has been attached to a CV
*
* op_spare three spare bits!
* 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).
*/

#define OPCODE U16

#ifdef PERL_MAD
# define MADPROP_IN_BASEOP MADPROP* op_madprop;
#else
# define MADPROP_IN_BASEOP
#endif

typedef PERL_BITFIELD16 Optype;

#ifdef BASEOP_DEFINITION
#define BASEOP BASEOP_DEFINITION
#else
#define BASEOP \
OP* op_next; \
OP* op_sibling; \
OP* (CPERLscope(*op_ppaddr))(pTHX); \
MADPROP_IN_BASEOP \
PADOFFSET op_targ; \
PERL_BITFIELD16 op_type:9; \
PERL_BITFIELD16 op_opt:1; \
PERL_BITFIELD16 op_latefree:1; \
PERL_BITFIELD16 op_latefreed:1; \
PERL_BITFIELD16 op_attached:1; \
PERL_BITFIELD16 op_spare:3; \
U8 op_flags; \
U8 op_private;
#endif

/* If op_type:9 is changed to :10, also change PUSHEVAL in cop.h.
Also, if the type of op_type is ever changed (e.g. to PERL_BITFIELD32)
then all the other bit-fields before/after it should change their
types too to let VC pack them into the same 4 byte integer.*/

#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)

#define OP_GIMME_REVERSE(flags) \
((flags & G_VOID) ? OPf_WANT_VOID : \
(flags & G_ARRAY) ? OPf_WANT_LIST : \
OPf_WANT_SCALAR)

/*
=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_CONST, value is the hints hash for
eval, so return a copy from pp_const() */
/* 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 $@ */
/* On OP_ENTERITER, loop var is per-thread */
/* On pushre, rx is used as part of split, e.g. split " " */
/* On regcomp, "use re 'eval'" was in scope */
/* On OP_READLINE, was <$filehandle> */
/* On RV2[ACGHS]V, don't create GV--in
defined()*/
/* On OP_DBSTATE, indicates breakpoint
* (runtime property) */
/* On OP_AELEMFAST, indiciates pad var */
/* On OP_REQUIRE, was seen as CORE::require */
/* On OP_ENTERWHEN, there's no condition */
/* On OP_BREAK, an implicit break */
/* On OP_SMARTMATCH, an implicit smartmatch */
/* On OP_ANONHASH and OP_ANONLIST, create a
reference to the new anon hash or array */

/* 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. */
#define OPpASSIGN_CV_TO_GV 128 /* Possible optimisation for constants. */

/* 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
    /* 16 is used for OPpTARGET_MY */
#define OPpTRANS_COMPLEMENT 32
#define OPpTRANS_GROWS 64
#define OPpTRANS_DELETE 128
#define OPpTRANS_ALL (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF|OPpTRANS_IDENTICAL|OPpTRANS_SQUASH|OPpTRANS_COMPLEMENT|OPpTRANS_GROWS|OPpTRANS_DELETE)

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

/* Private for OP_RV2GV, OP_RV2SV, OP_AELEM, OP_HELEM, OP_PADSV */
#define OPpDEREF (32|64) /* autovivify: 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_ENTERSUB and 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, OP_ENTERITER only */
#define OPpOUR_INTRO 16 /* Variable was in an our() */
  /* OP_RV2[AGH]V, OP_PAD[AH]V, OP_[AH]ELEM */
#define OPpMAYBE_LVSUB 8 /* We might be an lvalue to return */
  /* OP_PADSV only */
#define OPpPAD_STATE 16 /* is a "state" pad */
  /* for OP_RV2?V, lower bits carry hints (currently only HINT_STRICT_REFS) */

  /* OP_RV2GV only */
#define OPpDONT_INIT_GV 4 /* Call gv_fetchpv with GV_NOINIT */
/* (Therefore will return whatever is currently in the symbol table, not
guaranteed to be a PVGV) */

  /* OP_RV2CV only */
#define OPpMAY_RETURN_CONSTANT 1 /* If a constant sub, return the constant */

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

/* Private for OP_ENTERITER and OP_ITER */
#define OPpITER_REVERSED 4 /* for (reverse ...) */
#define OPpITER_DEF 8 /* for $_ or for my $_ */

/* Private for OP_CONST */
#define OPpCONST_NOVER 2 /* no 6; */
#define OPpCONST_SHORTCIRCUIT 4 /* eg the constant 5 in (5 || foo) */
#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 /* Reversed sort */
#define OPpSORT_INPLACE 8 /* sort in-place; eg @a = sort @a */
#define OPpSORT_DESCEND 16 /* Descending sort */
#define OPpSORT_QSORT 32 /* Use quicksort (not mergesort) */
#define OPpSORT_STABLE 64 /* Use a stable algorithm */

/* 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*/

/* Private for OP_FTXXX */
#define OPpFT_ACCESS 2 /* use filetest 'access' */
#define OPpFT_STACKED 4 /* stacked filetest, as in "-f -x $f" */
#define OP_IS_FILETEST_ACCESS(op) \
(((op)->op_type) == OP_FTRREAD || \
((op)->op_type) == OP_FTRWRITE || \
((op)->op_type) == OP_FTREXEC || \
((op)->op_type) == OP_FTEREAD || \
((op)->op_type) == OP_FTEWRITE || \
((op)->op_type) == OP_FTEEXEC)

/* Private for OP_(MAP|GREP)(WHILE|START) */
#define OPpGREP_LEX 2 /* iterate over lexical $_ */
    
/* Private for OP_ENTEREVAL */
#define OPpEVAL_HAS_HH 2 /* Does it have a copy of %^H */
    
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;
#ifdef USE_ITHREADS
    IV op_pmoffset;
#else
    REGEXP * op_pmregexp; /* compiled expression */
#endif
    U32 op_pmflags;
    union {
OP * op_pmreplroot; /* For OP_SUBST */
#ifdef USE_ITHREADS
PADOFFSET op_pmtargetoff; /* For OP_PUSHRE */
#else
GV * op_pmtargetgv;
#endif
    } op_pmreplrootu;
    union {
OP * op_pmreplstart; /* Only used in OP_SUBST */
#ifdef USE_ITHREADS
char * op_pmstashpv; /* Only used in OP_MATCH, with PMf_ONCE set */
#else
HV * op_pmstash;
#endif
    } op_pmstashstartu;
};

#ifdef USE_ITHREADS
#define PM_GETRE(o) (INT2PTR(REGEXP*,SvIVX(PL_regex_pad[(o)->op_pmoffset])))
/* The assignment is just to enforce type safety (or at least get a warning).
*/
#define PM_SETRE(o,r) STMT_START { \
const REGEXP *const slosh = (r); \
PM_SETRE_OFFSET((o), PTR2IV(slosh)); \
} STMT_END
/* Actually you can assign any IV, not just an offset. And really should it be
UV? */
#define PM_SETRE_OFFSET(o,iv) \
STMT_START { \
SV* const sv = PL_regex_pad[(o)->op_pmoffset]; \
sv_setiv(sv, (iv)); \
} STMT_END

# ifndef PERL_CORE
/* No longer used anywhere in the core. Migrate to Devel::PPPort? */
#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)
# endif
#else
#define PM_GETRE(o) ((o)->op_pmregexp)
#define PM_SETRE(o,r) ((o)->op_pmregexp = (r))
# ifndef PERL_CORE
#define PM_GETRE_SAFE PM_GETRE
#define PM_SETRE_SAFE PM_SETRE
# endif
#endif


#define PMf_RETAINT 0x0001 /* taint $1 etc. if target tainted */
#define PMf_ONCE 0x0002 /* match successfully only once per
reset, with related flag RXf_USED
in re->extflags holding state.
This is used only for ?? matches,
and only on OP_MATCH and OP_QR */

#define PMf_UNUSED 0x0004 /* free for use */
#define PMf_MAYBE_CONST 0x0008 /* replacement contains variables */

#define PMf_USED 0x0010 /* PMf_ONCE has matched successfully.
Not used under threading. */

#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 */

/* The following flags have exact equivalents in regcomp.h with the prefix RXf_
* which are stored in the regexp->extflags member. If you change them here,
* you have to change them there, and vice versa.
*/
#define PMf_LOCALE 0x00800 /* use locale for character types */
#define PMf_MULTILINE 0x01000 /* assume multiple lines */
#define PMf_SINGLELINE 0x02000 /* assume single line */
#define PMf_FOLD 0x04000 /* case insensitivity */
#define PMf_EXTENDED 0x08000 /* chuck embedded whitespace */
#define PMf_KEEPCOPY 0x10000 /* copy the string when matching */

/* mask of bits that need to be transfered to re->extflags */
#define PMf_COMPILETIME (PMf_MULTILINE|PMf_SINGLELINE|PMf_LOCALE|PMf_FOLD|PMf_EXTENDED|PMf_KEEPCOPY)

#ifdef USE_ITHREADS

# define PmopSTASHPV(o) \
(((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstashpv : NULL)
# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
# define PmopSTASHPV_set(o,pv) ({ \
assert((o)->op_pmflags & PMf_ONCE); \
((o)->op_pmstashstartu.op_pmstashpv = savesharedpv(pv)); \
})
# else
# define PmopSTASHPV_set(o,pv) \
((o)->op_pmstashstartu.op_pmstashpv = savesharedpv(pv))
# endif
# define PmopSTASH(o) (PmopSTASHPV(o) \
? gv_stashpv((o)->op_pmstashstartu.op_pmstashpv,GV_ADD) : NULL)
# define PmopSTASH_set(o,hv) PmopSTASHPV_set(o, ((hv) ? HvNAME_get(hv) : NULL))
# define PmopSTASH_free(o) PerlMemShared_free(PmopSTASHPV(o))

#else
# define PmopSTASH(o) \
(((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstash : NULL)
# if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
# define PmopSTASH_set(o,hv) ({ \
assert((o)->op_pmflags & PMf_ONCE); \
((o)->op_pmstashstartu.op_pmstash = (hv)); \
})
# else
# define PmopSTASH_set(o,hv) ((o)->op_pmstashstartu.op_pmstash = (hv))
# endif
# define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME_get(PmopSTASH(o)) : NULL)
   /* op_pmstashstartu.op_pmstash is not refcounted */
# define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
/* Note that if this becomes non-empty, then S_forget_pmop in op.c will need
changing */
# 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 && isGV_with_GP(v) \
&& 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 ((OP*)NULL)

/* 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

/* Op_REFCNT is a reference count at the head of each op tree: needed
* since the tree is shared between threads, and between cloned closure
* copies in the same thread. OP_REFCNT_LOCK/UNLOCK is used when modifying
* this count.
* The same mutex is used to protect the refcounts of the reg_trie_data
* and reg_ac_data structures, which are shared between duplicated
* regexes.
*/

#ifdef USE_ITHREADS
# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
# ifdef PERL_CORE
# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
# else
# define OP_REFCNT_LOCK op_refcnt_lock()
# define OP_REFCNT_UNLOCK op_refcnt_unlock()
# endif
# 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))
#ifdef PERL_DEBUG_READONLY_OPS
# define OpREFCNT_inc(o) Perl_op_refcnt_inc(aTHX_ o)
# define OpREFCNT_dec(o) Perl_op_refcnt_dec(aTHX_ o)
#else
# define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : NULL)
# define OpREFCNT_dec(o) (--(o)->op_targ)
#endif

/* flags used by Perl_load_module() */
#define PERL_LOADMOD_DENY 0x1 /* no Module */
#define PERL_LOADMOD_NOIMPORT 0x2 /* use Module () */
#define PERL_LOADMOD_IMPORT_OPS 0x4 /* use Module (...) */

#if defined(PERL_IN_PERLY_C) || defined(PERL_IN_OP_C)
#define ref(o, type) doref(o, type, TRUE)
#endif

/* no longer used anywhere in core */
#ifndef PERL_CORE
#define cv_ckproto(cv, gv, p) \
cv_ckproto_len((cv), (gv), (p), (p) ? strlen(p) : 0)
#endif

#ifdef USE_REENTRANT_API
#include "reentr.h"
#endif

#if defined(PL_OP_SLAB_ALLOC)
#define NewOp(m,var,c,type) \
(var = (type *) Perl_Slab_Alloc(aTHX_ c*sizeof(type)))
#define NewOpSz(m,var,size) \
(var = (OP *) Perl_Slab_Alloc(aTHX_ size))
#define FreeOp(p) Perl_Slab_Free(aTHX_ p)
#else
#define NewOp(m, var, c, type) \
(var = (MEM_WRAP_CHECK_(c,type) \
(type*)PerlMemShared_calloc(c, sizeof(type))))
#define NewOpSz(m, var, size) \
(var = (OP*)PerlMemShared_calloc(1, size))
#define FreeOp(p) PerlMemShared_free(p)
#endif

#ifdef PERL_MAD
# define MAD_NULL 1
# define MAD_PV 2
# define MAD_OP 3
# define MAD_SV 4

struct madprop {
    MADPROP* mad_next;
    const void *mad_val;
    U32 mad_vlen;
/* short mad_count; */
    char mad_key;
    char mad_type;
};

struct token {
    I32 tk_type;
    YYSTYPE tk_lval;
    MADPROP* tk_mad;
};
#endif

/*
* Values that can be held by mad_key :
* ^ unfilled head spot
* , literal ,
* ; literal ; (blank if implicit ; at end of block)
* : literal : from ?: or attr list
* + unary +
* ? literal ? from ?:
* ( literal (
* ) literal )
* [ literal [
* ] literal ]
* { literal {
* } literal }
* @ literal @ sigil
* $ literal $ sigil
* * literal * sigil
* ! use is source filtered
* & & or sub
* # whitespace/comment following ; or }
* # $# sigil
* 1 1st ; from for(;;)
* 1 retired protasis
* 2 2nd ; from for(;;)
* 2 retired apodosis
* 3 C-style for list
* a sub or var attributes
* a non-method arrow operator
* A method arrow operator
* A use import args
* b format block
* B retired stub block
* C constant conditional op
* d declarator
* D do block
* e unreached "else" (see C)
* e expression producing E
* E tr/E/R/, /E/
* f folded constant op
* F peg op for format
* g op was forced to be a word
* i if/unless modifier
* I if/elsif/unless statement
* k local declarator
* K retired kid op
* l last index of array ($#foo)
* L label
* m modifier on regex
* n sub or format name
* o current operator/declarator name
* o else/continue
* O generic optimized op
* p peg to hold extra whitespace at statement level
* P peg op for package declaration
* q opening quote
* = quoted material
* Q closing quote
* Q optimized qw//
* r expression producing R
* R tr/E/R/ s/E/R/
* s sub signature
* S use import stub (no import)
* S retired sort block
* t unreached "then" (see C)
* U use import op
* v private sv of for loop
* V use version
* w while/until modifier
* W while/for statement
* x optimized qw
* X random thing
* _ whitespace/comments preceding anything else
* ~ =~ operator
*/

/*
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*
* ex: set ts=8 sts=4 sw=4 noet:
*/
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