[perl5.git] / cop.h

/*    cop.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.
 *
 */

struct cop {
    BASEOP
    char *	cop_label;	/* label for this construct */
#ifdef USE_ITHREADS
    char *	cop_stashpv;	/* package line was compiled in */
    char *	cop_file;	/* file name the following line # is from */
#else
    HV *	cop_stash;	/* package line was compiled in */
    GV *	cop_filegv;	/* file the following line # is from */
#endif
    U32		cop_seq;	/* parse sequence number */
    I32		cop_arybase;	/* array base this line was compiled with */
    line_t      cop_line;       /* line # of this command */
    SV *	cop_warnings;	/* lexical warnings bitmask */
    SV *	cop_io;		/* lexical IO defaults */
};

#define Nullcop Null(COP*)

#ifdef USE_ITHREADS
#  define CopFILE(c)		((c)->cop_file)
#  define CopFILEGV(c)		(CopFILE(c) \
				 ? gv_fetchfile(CopFILE(c)) : Nullgv)
				 
 #ifdef NETWARE
  #define CopFILE_set(c,pv)	((c)->cop_file = savepv(pv))
 #else
  #define CopFILE_set(c,pv)	((c)->cop_file = savesharedpv(pv))
 #endif

#  define CopFILESV(c)		(CopFILE(c) \
				 ? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv)
#  define CopFILEAV(c)		(CopFILE(c) \
				 ? GvAV(gv_fetchfile(CopFILE(c))) : Nullav)
#  define CopSTASHPV(c)		((c)->cop_stashpv)

  #ifdef NETWARE
    #define CopSTASHPV_set(c,pv)	((c)->cop_stashpv = ((pv) ? savepv(pv) : Nullch))
  #else
    #define CopSTASHPV_set(c,pv)	((c)->cop_stashpv = savesharedpv(pv))
  #endif

#  define CopSTASH(c)		(CopSTASHPV(c) \
				 ? gv_stashpv(CopSTASHPV(c),GV_ADD) : Nullhv)
#  define CopSTASH_set(c,hv)	CopSTASHPV_set(c, (hv) ? HvNAME(hv) : Nullch)
#  define CopSTASH_eq(c,hv)	((hv) 					\
				 && (CopSTASHPV(c) == HvNAME(hv)	\
				     || (CopSTASHPV(c) && HvNAME(hv)	\
					 && strEQ(CopSTASHPV(c), HvNAME(hv)))))
  #ifdef NETWARE
    #define CopSTASH_free(c) SAVECOPSTASH_FREE(c)
  #else
    #define CopSTASH_free(c)	PerlMemShared_free(CopSTASHPV(c))      
  #endif

  #ifdef NETWARE
    #define CopFILE_free(c) SAVECOPFILE_FREE(c)
  #else
    #define CopFILE_free(c)	(PerlMemShared_free(CopFILE(c)),(CopFILE(c) = Nullch))      
  #endif
#else
#  define CopFILEGV(c)		((c)->cop_filegv)
#  define CopFILEGV_set(c,gv)	((c)->cop_filegv = (GV*)SvREFCNT_inc(gv))
#  define CopFILE_set(c,pv)	CopFILEGV_set((c), gv_fetchfile(pv))
#  define CopFILESV(c)		(CopFILEGV(c) ? GvSV(CopFILEGV(c)) : Nullsv)
#  define CopFILEAV(c)		(CopFILEGV(c) ? GvAV(CopFILEGV(c)) : Nullav)
#  define CopFILE(c)		(CopFILESV(c) ? SvPVX(CopFILESV(c)) : Nullch)
#  define CopSTASH(c)		((c)->cop_stash)
#  define CopSTASH_set(c,hv)	((c)->cop_stash = (hv))
#  define CopSTASHPV(c)		(CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch)
   /* cop_stash is not refcounted */
#  define CopSTASHPV_set(c,pv)	CopSTASH_set((c), gv_stashpv(pv,GV_ADD))
#  define CopSTASH_eq(c,hv)	(CopSTASH(c) == (hv))
#  define CopSTASH_free(c)	
#  define CopFILE_free(c)	(SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = Nullgv))

#endif /* USE_ITHREADS */

#define CopSTASH_ne(c,hv)	(!CopSTASH_eq(c,hv))
#define CopLINE(c)		((c)->cop_line)
#define CopLINE_inc(c)		(++CopLINE(c))
#define CopLINE_dec(c)		(--CopLINE(c))
#define CopLINE_set(c,l)	(CopLINE(c) = (l))

/* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */
#ifdef MACOS_TRADITIONAL
#  define OutCopFILE(c) MacPerl_MPWFileName(CopFILE(c))
#else
#  define OutCopFILE(c) CopFILE(c)
#endif

/*
 * Here we have some enormously heavy (or at least ponderous) wizardry.
 */

/* subroutine context */
struct block_sub {
    CV *	cv;
    GV *	gv;
    GV *	dfoutgv;
    AV *	savearray;
    AV *	argarray;
    long	olddepth;
    U8		hasargs;
    U8		lval;		/* XXX merge lval and hasargs? */
    PAD		*oldcomppad;
};

#define PUSHSUB(cx)							\
	cx->blk_sub.cv = cv;						\
	cx->blk_sub.olddepth = CvDEPTH(cv);				\
	cx->blk_sub.hasargs = hasargs;					\
	cx->blk_sub.lval = PL_op->op_private &                          \
	                      (OPpLVAL_INTRO|OPpENTERSUB_INARGS);

#define PUSHFORMAT(cx)							\
	cx->blk_sub.cv = cv;						\
	cx->blk_sub.gv = gv;						\
	cx->blk_sub.hasargs = 0;					\
	cx->blk_sub.dfoutgv = PL_defoutgv;				\
	(void)SvREFCNT_inc(cx->blk_sub.dfoutgv)

#define POP_SAVEARRAY()						\
    STMT_START {							\
	SvREFCNT_dec(GvAV(PL_defgv));					\
	GvAV(PL_defgv) = cx->blk_sub.savearray;				\
    } STMT_END

/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
 * leave any (a fast av_clear(ary), basically) */
#define CLEAR_ARGARRAY(ary) \
    STMT_START {							\
	AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary);			\
	SvPVX(ary) = (char*)AvALLOC(ary);				\
	AvFILLp(ary) = -1;						\
    } STMT_END

#define POPSUB(cx,sv)							\
    STMT_START {							\
	if (cx->blk_sub.hasargs) {					\
	    POP_SAVEARRAY();						\
	    /* abandon @_ if it got reified */				\
	    if (AvREAL(cx->blk_sub.argarray)) {				\
		SSize_t fill = AvFILLp(cx->blk_sub.argarray);		\
		SvREFCNT_dec(cx->blk_sub.argarray);			\
		cx->blk_sub.argarray = newAV();				\
		av_extend(cx->blk_sub.argarray, fill);			\
		AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY;		\
		CX_CURPAD_SV(cx->blk_sub, 0) = (SV*)cx->blk_sub.argarray;	\
	    }								\
	    else {							\
		CLEAR_ARGARRAY(cx->blk_sub.argarray);			\
	    }								\
	}								\
	sv = (SV*)cx->blk_sub.cv;					\
	if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth))		\
	    sv = Nullsv;						\
    } STMT_END

#define LEAVESUB(sv)							\
    STMT_START {							\
	if (sv)								\
	    SvREFCNT_dec(sv);						\
    } STMT_END

#define POPFORMAT(cx)							\
	setdefout(cx->blk_sub.dfoutgv);					\
	SvREFCNT_dec(cx->blk_sub.dfoutgv);

/* eval context */
struct block_eval {
    I32		old_in_eval;
    I32		old_op_type;
    SV *	old_namesv;
    OP *	old_eval_root;
    SV *	cur_text;
    CV *	cv;
};

#define PUSHEVAL(cx,n,fgv)						\
    STMT_START {							\
	cx->blk_eval.old_in_eval = PL_in_eval;				\
	cx->blk_eval.old_op_type = PL_op->op_type;			\
	cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : Nullsv);		\
	cx->blk_eval.old_eval_root = PL_eval_root;			\
	cx->blk_eval.cur_text = PL_linestr;				\
	cx->blk_eval.cv = Nullcv; /* set by doeval(), as applicable */	\
    } STMT_END

#define POPEVAL(cx)							\
    STMT_START {							\
	PL_in_eval = cx->blk_eval.old_in_eval;				\
	optype = cx->blk_eval.old_op_type;				\
	PL_eval_root = cx->blk_eval.old_eval_root;			\
	if (cx->blk_eval.old_namesv)					\
	    sv_2mortal(cx->blk_eval.old_namesv);			\
    } STMT_END

/* loop context */
struct block_loop {
    char *	label;
    I32		resetsp;
    OP *	redo_op;
    OP *	next_op;
    OP *	last_op;
#ifdef USE_ITHREADS
    void *	iterdata;
    PAD		*oldcomppad;
#else
    SV **	itervar;
#endif
    SV *	itersave;
    SV *	iterlval;
    AV *	iterary;
    IV		iterix;
    IV		itermax;
};

#ifdef USE_ITHREADS
#  define CxITERVAR(c)							\
	((c)->blk_loop.iterdata						\
	 ? (CxPADLOOP(cx) 						\
	    ? &CX_CURPAD_SV( (c)->blk_loop, 				\
		    INT2PTR(PADOFFSET, (c)->blk_loop.iterdata))		\
	    : &GvSV((GV*)(c)->blk_loop.iterdata))			\
	 : (SV**)NULL)
#  define CX_ITERDATA_SET(cx,idata)					\
	CX_CURPAD_SAVE(cx->blk_loop);					\
	if ((cx->blk_loop.iterdata = (idata)))				\
	    cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx));	\
	else								\
	    cx->blk_loop.itersave = Nullsv;
#else
#  define CxITERVAR(c)		((c)->blk_loop.itervar)
#  define CX_ITERDATA_SET(cx,ivar)					\
	if ((cx->blk_loop.itervar = (SV**)(ivar)))			\
	    cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx));	\
	else								\
	    cx->blk_loop.itersave = Nullsv;
#endif

#define PUSHLOOP(cx, dat, s)						\
	cx->blk_loop.label = PL_curcop->cop_label;			\
	cx->blk_loop.resetsp = s - PL_stack_base;			\
	cx->blk_loop.redo_op = cLOOP->op_redoop;			\
	cx->blk_loop.next_op = cLOOP->op_nextop;			\
	cx->blk_loop.last_op = cLOOP->op_lastop;			\
	cx->blk_loop.iterlval = Nullsv;					\
	cx->blk_loop.iterary = Nullav;					\
	cx->blk_loop.iterix = -1;					\
	CX_ITERDATA_SET(cx,dat);

#define POPLOOP(cx)							\
	SvREFCNT_dec(cx->blk_loop.iterlval);				\
	if (CxITERVAR(cx)) {						\
	    SV **s_v_p = CxITERVAR(cx);					\
	    sv_2mortal(*s_v_p);						\
	    *s_v_p = cx->blk_loop.itersave;				\
	}								\
	if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\
	    SvREFCNT_dec(cx->blk_loop.iterary);

/* context common to subroutines, evals and loops */
struct block {
    I32		blku_oldsp;	/* stack pointer to copy stuff down to */
    COP *	blku_oldcop;	/* old curcop pointer */
    I32		blku_oldretsp;	/* return stack index */
    I32		blku_oldmarksp;	/* mark stack index */
    I32		blku_oldscopesp;	/* scope stack index */
    PMOP *	blku_oldpm;	/* values of pattern match vars */
    U8		blku_gimme;	/* is this block running in list context? */

    union {
	struct block_sub	blku_sub;
	struct block_eval	blku_eval;
	struct block_loop	blku_loop;
    } blk_u;
};
#define blk_oldsp	cx_u.cx_blk.blku_oldsp
#define blk_oldcop	cx_u.cx_blk.blku_oldcop
#define blk_oldretsp	cx_u.cx_blk.blku_oldretsp
#define blk_oldmarksp	cx_u.cx_blk.blku_oldmarksp
#define blk_oldscopesp	cx_u.cx_blk.blku_oldscopesp
#define blk_oldpm	cx_u.cx_blk.blku_oldpm
#define blk_gimme	cx_u.cx_blk.blku_gimme
#define blk_sub		cx_u.cx_blk.blk_u.blku_sub
#define blk_eval	cx_u.cx_blk.blk_u.blku_eval
#define blk_loop	cx_u.cx_blk.blk_u.blku_loop

/* Enter a block. */
#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix],		\
	cx->cx_type		= t,					\
	cx->blk_oldsp		= sp - PL_stack_base,			\
	cx->blk_oldcop		= PL_curcop,				\
	cx->blk_oldmarksp	= PL_markstack_ptr - PL_markstack,	\
	cx->blk_oldscopesp	= PL_scopestack_ix,			\
	cx->blk_oldretsp	= PL_retstack_ix,			\
	cx->blk_oldpm		= PL_curpm,				\
	cx->blk_gimme		= (U8)gimme;				\
	DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n",	\
		    (long)cxstack_ix, PL_block_type[CxTYPE(cx)]); )

/* Exit a block (RETURN and LAST). */
#define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--],			\
	newsp		 = PL_stack_base + cx->blk_oldsp,		\
	PL_curcop	 = cx->blk_oldcop,				\
	PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp,		\
	PL_scopestack_ix = cx->blk_oldscopesp,				\
	PL_retstack_ix	 = cx->blk_oldretsp,				\
	pm		 = cx->blk_oldpm,				\
	gimme		 = cx->blk_gimme;				\
	DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n",		\
		    (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); )

/* Continue a block elsewhere (NEXT and REDO). */
#define TOPBLOCK(cx) cx  = &cxstack[cxstack_ix],			\
	PL_stack_sp	 = PL_stack_base + cx->blk_oldsp,		\
	PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp,		\
	PL_scopestack_ix = cx->blk_oldscopesp,				\
	PL_retstack_ix	 = cx->blk_oldretsp,				\
	PL_curpm         = cx->blk_oldpm

/* substitution context */
struct subst {
    I32		sbu_iters;
    I32		sbu_maxiters;
    I32		sbu_rflags;
    I32		sbu_oldsave;
    bool	sbu_once;
    bool	sbu_rxtainted;
    char *	sbu_orig;
    SV *	sbu_dstr;
    SV *	sbu_targ;
    char *	sbu_s;
    char *	sbu_m;
    char *	sbu_strend;
    void *	sbu_rxres;
    REGEXP *	sbu_rx;
};
#define sb_iters	cx_u.cx_subst.sbu_iters
#define sb_maxiters	cx_u.cx_subst.sbu_maxiters
#define sb_rflags	cx_u.cx_subst.sbu_rflags
#define sb_oldsave	cx_u.cx_subst.sbu_oldsave
#define sb_once		cx_u.cx_subst.sbu_once
#define sb_rxtainted	cx_u.cx_subst.sbu_rxtainted
#define sb_orig		cx_u.cx_subst.sbu_orig
#define sb_dstr		cx_u.cx_subst.sbu_dstr
#define sb_targ		cx_u.cx_subst.sbu_targ
#define sb_s		cx_u.cx_subst.sbu_s
#define sb_m		cx_u.cx_subst.sbu_m
#define sb_strend	cx_u.cx_subst.sbu_strend
#define sb_rxres	cx_u.cx_subst.sbu_rxres
#define sb_rx		cx_u.cx_subst.sbu_rx

#define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix],			\
	cx->sb_iters		= iters,				\
	cx->sb_maxiters		= maxiters,				\
	cx->sb_rflags		= r_flags,				\
	cx->sb_oldsave		= oldsave,				\
	cx->sb_once		= once,					\
	cx->sb_rxtainted	= rxtainted,				\
	cx->sb_orig		= orig,					\
	cx->sb_dstr		= dstr,					\
	cx->sb_targ		= targ,					\
	cx->sb_s		= s,					\
	cx->sb_m		= m,					\
	cx->sb_strend		= strend,				\
	cx->sb_rxres		= Null(void*),				\
	cx->sb_rx		= rx,					\
	cx->cx_type		= CXt_SUBST;				\
	rxres_save(&cx->sb_rxres, rx)

#define POPSUBST(cx) cx = &cxstack[cxstack_ix--];			\
	rxres_free(&cx->sb_rxres)

struct context {
    U32		cx_type;	/* what kind of context this is */
    union {
	struct block	cx_blk;
	struct subst	cx_subst;
    } cx_u;
};

#define CXTYPEMASK	0xff
#define CXt_NULL	0
#define CXt_SUB		1
#define CXt_EVAL	2
#define CXt_LOOP	3
#define CXt_SUBST	4
#define CXt_BLOCK	5
#define CXt_FORMAT	6

/* private flags for CXt_EVAL */
#define CXp_REAL	0x00000100	/* truly eval'', not a lookalike */
#define CXp_TRYBLOCK	0x00000200	/* eval{}, not eval'' or similar */

#ifdef USE_ITHREADS
/* private flags for CXt_LOOP */
#  define CXp_PADVAR	0x00000100	/* itervar lives on pad, iterdata
					   has pad offset; if not set,
					   iterdata holds GV* */
#  define CxPADLOOP(c)	(((c)->cx_type & (CXt_LOOP|CXp_PADVAR))		\
			 == (CXt_LOOP|CXp_PADVAR))
#endif

#define CxTYPE(c)	((c)->cx_type & CXTYPEMASK)
#define CxREALEVAL(c)	(((c)->cx_type & (CXt_EVAL|CXp_REAL))		\
			 == (CXt_EVAL|CXp_REAL))
#define CxTRYBLOCK(c)	(((c)->cx_type & (CXt_EVAL|CXp_TRYBLOCK))	\
			 == (CXt_EVAL|CXp_TRYBLOCK))

#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))

/* 
=head1 "Gimme" Values
*/

/*
=for apidoc AmU||G_SCALAR
Used to indicate scalar context.  See C<GIMME_V>, C<GIMME>, and
L<perlcall>.

=for apidoc AmU||G_ARRAY
Used to indicate list context.  See C<GIMME_V>, C<GIMME> and
L<perlcall>.

=for apidoc AmU||G_VOID
Used to indicate void context.  See C<GIMME_V> and L<perlcall>.

=for apidoc AmU||G_DISCARD
Indicates that arguments returned from a callback should be discarded.  See
L<perlcall>.

=for apidoc AmU||G_EVAL

Used to force a Perl C<eval> wrapper around a callback.  See
L<perlcall>.

=for apidoc AmU||G_NOARGS

Indicates that no arguments are being sent to a callback.  See
L<perlcall>.

=cut
*/

#define G_SCALAR	0
#define G_ARRAY		1
#define G_VOID		128	/* skip this bit when adding flags below */

/* extra flags for Perl_call_* routines */
#define G_DISCARD	2	/* Call FREETMPS. */
#define G_EVAL		4	/* Assume eval {} around subroutine call. */
#define G_NOARGS	8	/* Don't construct a @_ array. */
#define G_KEEPERR      16	/* Append errors to $@, don't overwrite it */
#define G_NODEBUG      32	/* Disable debugging at toplevel.  */
#define G_METHOD       64       /* Calling method. */

/* flag bits for PL_in_eval */
#define EVAL_NULL	0	/* not in an eval */
#define EVAL_INEVAL	1	/* some enclosing scope is an eval */
#define EVAL_WARNONLY	2	/* used by yywarn() when calling yyerror() */
#define EVAL_KEEPERR	4	/* set by Perl_call_sv if G_KEEPERR */
#define EVAL_INREQUIRE	8	/* The code is being required. */

/* Support for switching (stack and block) contexts.
 * This ensures magic doesn't invalidate local stack and cx pointers.
 */

#define PERLSI_UNKNOWN		-1
#define PERLSI_UNDEF		0
#define PERLSI_MAIN		1
#define PERLSI_MAGIC		2
#define PERLSI_SORT		3
#define PERLSI_SIGNAL		4
#define PERLSI_OVERLOAD		5
#define PERLSI_DESTROY		6
#define PERLSI_WARNHOOK		7
#define PERLSI_DIEHOOK		8
#define PERLSI_REQUIRE		9

struct stackinfo {
    AV *		si_stack;	/* stack for current runlevel */
    PERL_CONTEXT *	si_cxstack;	/* context stack for runlevel */
    I32			si_cxix;	/* current context index */
    I32			si_cxmax;	/* maximum allocated index */
    I32			si_type;	/* type of runlevel */
    struct stackinfo *	si_prev;
    struct stackinfo *	si_next;
    I32			si_markoff;	/* offset where markstack begins for us.
					 * currently used only with DEBUGGING,
					 * but not #ifdef-ed for bincompat */
};

typedef struct stackinfo PERL_SI;

#define cxstack		(PL_curstackinfo->si_cxstack)
#define cxstack_ix	(PL_curstackinfo->si_cxix)
#define cxstack_max	(PL_curstackinfo->si_cxmax)

#ifdef DEBUGGING
#  define	SET_MARK_OFFSET \
    PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
#else
#  define	SET_MARK_OFFSET NOOP
#endif

#define PUSHSTACKi(type) \
    STMT_START {							\
	PERL_SI *next = PL_curstackinfo->si_next;			\
	if (!next) {							\
	    next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1);	\
	    next->si_prev = PL_curstackinfo;				\
	    PL_curstackinfo->si_next = next;				\
	}								\
	next->si_type = type;						\
	next->si_cxix = -1;						\
	AvFILLp(next->si_stack) = 0;					\
	SWITCHSTACK(PL_curstack,next->si_stack);			\
	PL_curstackinfo = next;						\
	SET_MARK_OFFSET;						\
    } STMT_END

#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)

/* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
 * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
#define POPSTACK \
    STMT_START {							\
	dSP;								\
	PERL_SI *prev = PL_curstackinfo->si_prev;			\
	if (!prev) {							\
	    PerlIO_printf(Perl_error_log, "panic: POPSTACK\n");		\
	    my_exit(1);							\
	}								\
	SWITCHSTACK(PL_curstack,prev->si_stack);			\
	/* don't free prev here, free them all at the END{} */		\
	PL_curstackinfo = prev;						\
    } STMT_END

#define POPSTACK_TO(s) \
    STMT_START {							\
	while (PL_curstack != s) {					\
	    dounwind(-1);						\
	    POPSTACK;							\
	}								\
    } STMT_END
Commit	Line	Data
a0d0e21e	1	/* cop.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	*/
79072805 LW	9
79072805 LW	10	struct cop {
79072805 LW	11	BASEOP
a0d0e21e	12	char * cop_label; /* label for this construct */
57843af0	13	#ifdef USE_ITHREADS
11faa288	14	char * cop_stashpv; /* package line was compiled in */
57843af0 GS	15	char * cop_file; /* file name the following line # is from */
57843af0 GS	16	#else
11faa288	17	HV * cop_stash; /* package line was compiled in */
79072805	18	GV * cop_filegv; /* file the following line # is from */
57843af0	19	#endif
a0d0e21e LW	20	U32 cop_seq; /* parse sequence number */
a0d0e21e LW	21	I32 cop_arybase; /* array base this line was compiled with */
79072805	22	line_t cop_line; /* line # of this command */
599cee73	23	SV * cop_warnings; /* lexical warnings bitmask */
ac27b0f5	24	SV * cop_io; /* lexical IO defaults */
79072805 LW	25	};
	26
	27	#define Nullcop Null(COP*)
	28
57843af0 GS	29	#ifdef USE_ITHREADS
	30	# define CopFILE(c) ((c)->cop_file)
	31	# define CopFILEGV(c) (CopFILE(c) \
	32	? gv_fetchfile(CopFILE(c)) : Nullgv)
083fcd59 JH	33
	34	#ifdef NETWARE
	35	#define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv))
	36	#else
	37	#define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv))
	38	#endif
	39
57843af0 GS	40	# define CopFILESV(c) (CopFILE(c) \
	41	? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv)
	42	# define CopFILEAV(c) (CopFILE(c) \
	43	? GvAV(gv_fetchfile(CopFILE(c))) : Nullav)
57843af0	44	# define CopSTASHPV(c) ((c)->cop_stashpv)
083fcd59 JH	45
	46	#ifdef NETWARE
	47	#define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : Nullch))
	48	#else
	49	#define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv))
	50	#endif
	51
11faa288 GS	52	# define CopSTASH(c) (CopSTASHPV(c) \
11faa288 GS	53	? gv_stashpv(CopSTASHPV(c),GV_ADD) : Nullhv)
7b910cb8	54	# define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME(hv) : Nullch)
f4dd75d9	55	# define CopSTASH_eq(c,hv) ((hv) \
ed094faf GS	56	&& (CopSTASHPV(c) == HvNAME(hv) \
	57	\|\| (CopSTASHPV(c) && HvNAME(hv) \
	58	&& strEQ(CopSTASHPV(c), HvNAME(hv)))))
083fcd59 JH	59	#ifdef NETWARE
	60	#define CopSTASH_free(c) SAVECOPSTASH_FREE(c)
	61	#else
	62	#define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c))
	63	#endif
	64
	65	#ifdef NETWARE
	66	#define CopFILE_free(c) SAVECOPFILE_FREE(c)
	67	#else
	68	#define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = Nullch))
	69	#endif
57843af0 GS	70	#else
57843af0 GS	71	# define CopFILEGV(c) ((c)->cop_filegv)
f4dd75d9 GS	72	# define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv))
f4dd75d9 GS	73	# define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv))
57843af0 GS	74	# define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : Nullsv)
	75	# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : Nullav)
	76	# define CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : Nullch)
	77	# define CopSTASH(c) ((c)->cop_stash)
f4dd75d9	78	# define CopSTASH_set(c,hv) ((c)->cop_stash = (hv))
57843af0	79	# define CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch)
f4dd75d9 GS	80	/* cop_stash is not refcounted */
	81	# define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD))
	82	# define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv))
05ec9bb3 NIS	83	# define CopSTASH_free(c)
	84	# define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = Nullgv))
	85
57843af0 GS	86	#endif /* USE_ITHREADS */
57843af0 GS	87
ed094faf	88	#define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv))
cc49e20b	89	#define CopLINE(c) ((c)->cop_line)
57843af0 GS	90	#define CopLINE_inc(c) (++CopLINE(c))
	91	#define CopLINE_dec(c) (--CopLINE(c))
	92	#define CopLINE_set(c,l) (CopLINE(c) = (l))
cc49e20b	93
248c2a4d CN	94	/* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */
	95	#ifdef MACOS_TRADITIONAL
	96	# define OutCopFILE(c) MacPerl_MPWFileName(CopFILE(c))
	97	#else
	98	# define OutCopFILE(c) CopFILE(c)
	99	#endif
	100
79072805 LW	101	/*
	102	* Here we have some enormously heavy (or at least ponderous) wizardry.
	103	*/
	104
	105	/* subroutine context */
	106	struct block_sub {
	107	CV * cv;
	108	GV * gv;
463ee0b2	109	GV * dfoutgv;
79072805 LW	110	AV * savearray;
79072805 LW	111	AV * argarray;
b8f55b69	112	long olddepth;
79072805	113	U8 hasargs;
cd06dffe	114	U8 lval; /* XXX merge lval and hasargs? */
f3548bdc	115	PAD *oldcomppad;
79072805 LW	116	};
	117
	118	#define PUSHSUB(cx) \
	119	cx->blk_sub.cv = cv; \
b8f55b69	120	cx->blk_sub.olddepth = CvDEPTH(cv); \
cd06dffe GS	121	cx->blk_sub.hasargs = hasargs; \
	122	cx->blk_sub.lval = PL_op->op_private & \
	123	(OPpLVAL_INTRO\|OPpENTERSUB_INARGS);
79072805 LW	124
	125	#define PUSHFORMAT(cx) \
	126	cx->blk_sub.cv = cv; \
	127	cx->blk_sub.gv = gv; \
4633a7c4	128	cx->blk_sub.hasargs = 0; \
3280af22	129	cx->blk_sub.dfoutgv = PL_defoutgv; \
4633a7c4	130	(void)SvREFCNT_inc(cx->blk_sub.dfoutgv)
79072805	131
3db8f154	132	#define POP_SAVEARRAY() \
6d4ff0d2	133	STMT_START { \
3280af22	134	SvREFCNT_dec(GvAV(PL_defgv)); \
a8bba7fa	135	GvAV(PL_defgv) = cx->blk_sub.savearray; \
6d4ff0d2	136	} STMT_END
6d4ff0d2	137
ecf8e9dd	138	/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
8e09340b GS	139	* leave any (a fast av_clear(ary), basically) */
	140	#define CLEAR_ARGARRAY(ary) \
	141	STMT_START { \
	142	AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \
	143	SvPVX(ary) = (char*)AvALLOC(ary); \
	144	AvFILLp(ary) = -1; \
	145	} STMT_END
7766f137	146
b0d9ce38 GS	147	#define POPSUB(cx,sv) \
b0d9ce38 GS	148	STMT_START { \
a8bba7fa	149	if (cx->blk_sub.hasargs) { \
7766f137	150	POP_SAVEARRAY(); \
d8b46c1b	151	/* abandon @_ if it got reified */ \
a8bba7fa GS	152	if (AvREAL(cx->blk_sub.argarray)) { \
	153	SSize_t fill = AvFILLp(cx->blk_sub.argarray); \
	154	SvREFCNT_dec(cx->blk_sub.argarray); \
	155	cx->blk_sub.argarray = newAV(); \
	156	av_extend(cx->blk_sub.argarray, fill); \
	157	AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY; \
dd2155a4	158	CX_CURPAD_SV(cx->blk_sub, 0) = (SV*)cx->blk_sub.argarray; \
d8b46c1b	159	} \
7766f137	160	else { \
8e09340b	161	CLEAR_ARGARRAY(cx->blk_sub.argarray); \
7766f137	162	} \
79072805	163	} \
b0d9ce38 GS	164	sv = (SV*)cx->blk_sub.cv; \
	165	if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \
	166	sv = Nullsv; \
	167	} STMT_END
	168
	169	#define LEAVESUB(sv) \
	170	STMT_START { \
	171	if (sv) \
	172	SvREFCNT_dec(sv); \
	173	} STMT_END
79072805 LW	174
79072805 LW	175	#define POPFORMAT(cx) \
4633a7c4 LW	176	setdefout(cx->blk_sub.dfoutgv); \
4633a7c4 LW	177	SvREFCNT_dec(cx->blk_sub.dfoutgv);
79072805 LW	178
	179	/* eval context */
	180	struct block_eval {
	181	I32 old_in_eval;
	182	I32 old_op_type;
0f79a09d	183	SV * old_namesv;
79072805	184	OP * old_eval_root;
748a9306	185	SV * cur_text;
2090ab20	186	CV * cv;
79072805 LW	187	};
79072805 LW	188
8990e307	189	#define PUSHEVAL(cx,n,fgv) \
0f79a09d	190	STMT_START { \
3280af22	191	cx->blk_eval.old_in_eval = PL_in_eval; \
a8bba7fa	192	cx->blk_eval.old_op_type = PL_op->op_type; \
0f79a09d	193	cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : Nullsv); \
a8bba7fa	194	cx->blk_eval.old_eval_root = PL_eval_root; \
0f79a09d	195	cx->blk_eval.cur_text = PL_linestr; \
2090ab20	196	cx->blk_eval.cv = Nullcv; /* set by doeval(), as applicable */ \
0f79a09d	197	} STMT_END
79072805 LW	198
79072805 LW	199	#define POPEVAL(cx) \
0f79a09d	200	STMT_START { \
3280af22	201	PL_in_eval = cx->blk_eval.old_in_eval; \
79072805	202	optype = cx->blk_eval.old_op_type; \
7766f137	203	PL_eval_root = cx->blk_eval.old_eval_root; \
0f79a09d GS	204	if (cx->blk_eval.old_namesv) \
	205	sv_2mortal(cx->blk_eval.old_namesv); \
	206	} STMT_END
79072805 LW	207
	208	/* loop context */
	209	struct block_loop {
	210	char * label;
	211	I32 resetsp;
	212	OP * redo_op;
	213	OP * next_op;
	214	OP * last_op;
7766f137 GS	215	#ifdef USE_ITHREADS
7766f137 GS	216	void * iterdata;
f3548bdc	217	PAD *oldcomppad;
7766f137	218	#else
79072805	219	SV ** itervar;
7766f137	220	#endif
79072805	221	SV * itersave;
5f05dabc	222	SV * iterlval;
79072805	223	AV * iterary;
89ea2908 GA	224	IV iterix;
89ea2908 GA	225	IV itermax;
79072805 LW	226	};
79072805 LW	227
7766f137 GS	228	#ifdef USE_ITHREADS
	229	# define CxITERVAR(c) \
	230	((c)->blk_loop.iterdata \
	231	? (CxPADLOOP(cx) \
dd2155a4 DM	232	? &CX_CURPAD_SV( (c)->blk_loop, \
dd2155a4 DM	233	INT2PTR(PADOFFSET, (c)->blk_loop.iterdata)) \
7766f137 GS	234	: &GvSV((GV*)(c)->blk_loop.iterdata)) \
	235	: (SV**)NULL)
	236	# define CX_ITERDATA_SET(cx,idata) \
dd2155a4	237	CX_CURPAD_SAVE(cx->blk_loop); \
155aba94	238	if ((cx->blk_loop.iterdata = (idata))) \
d10edb75 KC	239	cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \
	240	else \
	241	cx->blk_loop.itersave = Nullsv;
7766f137 GS	242	#else
	243	# define CxITERVAR(c) ((c)->blk_loop.itervar)
	244	# define CX_ITERDATA_SET(cx,ivar) \
155aba94	245	if ((cx->blk_loop.itervar = (SV**)(ivar))) \
d10edb75 KC	246	cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \
	247	else \
	248	cx->blk_loop.itersave = Nullsv;
7766f137 GS	249	#endif
	250
	251	#define PUSHLOOP(cx, dat, s) \
38a230cb GS	252	cx->blk_loop.label = PL_curcop->cop_label; \
38a230cb GS	253	cx->blk_loop.resetsp = s - PL_stack_base; \
79072805 LW	254	cx->blk_loop.redo_op = cLOOP->op_redoop; \
	255	cx->blk_loop.next_op = cLOOP->op_nextop; \
	256	cx->blk_loop.last_op = cLOOP->op_lastop; \
44a8e56a	257	cx->blk_loop.iterlval = Nullsv; \
44a8e56a	258	cx->blk_loop.iterary = Nullav; \
7766f137 GS	259	cx->blk_loop.iterix = -1; \
7766f137 GS	260	CX_ITERDATA_SET(cx,dat);
79072805 LW	261
79072805 LW	262	#define POPLOOP(cx) \
a8bba7fa	263	SvREFCNT_dec(cx->blk_loop.iterlval); \
7766f137 GS	264	if (CxITERVAR(cx)) { \
	265	SV **s_v_p = CxITERVAR(cx); \
	266	sv_2mortal(*s_v_p); \
	267	*s_v_p = cx->blk_loop.itersave; \
44a8e56a	268	} \
a8bba7fa GS	269	if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\
a8bba7fa GS	270	SvREFCNT_dec(cx->blk_loop.iterary);
79072805 LW	271
	272	/* context common to subroutines, evals and loops */
	273	struct block {
	274	I32 blku_oldsp; /* stack pointer to copy stuff down to */
	275	COP * blku_oldcop; /* old curcop pointer */
	276	I32 blku_oldretsp; /* return stack index */
	277	I32 blku_oldmarksp; /* mark stack index */
	278	I32 blku_oldscopesp; /* scope stack index */
	279	PMOP * blku_oldpm; /* values of pattern match vars */
	280	U8 blku_gimme; /* is this block running in list context? */
	281
	282	union {
	283	struct block_sub blku_sub;
	284	struct block_eval blku_eval;
	285	struct block_loop blku_loop;
	286	} blk_u;
	287	};
	288	#define blk_oldsp cx_u.cx_blk.blku_oldsp
	289	#define blk_oldcop cx_u.cx_blk.blku_oldcop
	290	#define blk_oldretsp cx_u.cx_blk.blku_oldretsp
	291	#define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
	292	#define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
	293	#define blk_oldpm cx_u.cx_blk.blku_oldpm
	294	#define blk_gimme cx_u.cx_blk.blku_gimme
	295	#define blk_sub cx_u.cx_blk.blk_u.blku_sub
	296	#define blk_eval cx_u.cx_blk.blk_u.blku_eval
	297	#define blk_loop cx_u.cx_blk.blk_u.blku_loop
	298
	299	/* Enter a block. */
8990e307	300	#define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
79072805	301	cx->cx_type = t, \
3280af22 NIS	302	cx->blk_oldsp = sp - PL_stack_base, \
3280af22 NIS	303	cx->blk_oldcop = PL_curcop, \
1aff0e91	304	cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \
3280af22	305	cx->blk_oldscopesp = PL_scopestack_ix, \
1aff0e91	306	cx->blk_oldretsp = PL_retstack_ix, \
3280af22	307	cx->blk_oldpm = PL_curpm, \
eb160463	308	cx->blk_gimme = (U8)gimme; \
bf49b057	309	DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \
1aff0e91	310	(long)cxstack_ix, PL_block_type[CxTYPE(cx)]); )
79072805 LW	311
79072805 LW	312	/* Exit a block (RETURN and LAST). */
a0d0e21e	313	#define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \
1aff0e91	314	newsp = PL_stack_base + cx->blk_oldsp, \
3280af22 NIS	315	PL_curcop = cx->blk_oldcop, \
	316	PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
	317	PL_scopestack_ix = cx->blk_oldscopesp, \
	318	PL_retstack_ix = cx->blk_oldretsp, \
	319	pm = cx->blk_oldpm, \
	320	gimme = cx->blk_gimme; \
bf49b057	321	DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \
22c35a8c	322	(long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); )
79072805 LW	323
79072805 LW	324	/* Continue a block elsewhere (NEXT and REDO). */
3280af22	325	#define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \
1aff0e91	326	PL_stack_sp = PL_stack_base + cx->blk_oldsp, \
3280af22 NIS	327	PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
3280af22 NIS	328	PL_scopestack_ix = cx->blk_oldscopesp, \
2158dd9b GS	329	PL_retstack_ix = cx->blk_oldretsp, \
2158dd9b GS	330	PL_curpm = cx->blk_oldpm
79072805 LW	331
	332	/* substitution context */
	333	struct subst {
	334	I32 sbu_iters;
	335	I32 sbu_maxiters;
22e551b9	336	I32 sbu_rflags;
4633a7c4	337	I32 sbu_oldsave;
71be2cbc	338	bool sbu_once;
71be2cbc	339	bool sbu_rxtainted;
79072805 LW	340	char * sbu_orig;
	341	SV * sbu_dstr;
	342	SV * sbu_targ;
	343	char * sbu_s;
	344	char * sbu_m;
	345	char * sbu_strend;
c90c0ff4	346	void * sbu_rxres;
c07a80fd	347	REGEXP * sbu_rx;
79072805 LW	348	};
	349	#define sb_iters cx_u.cx_subst.sbu_iters
	350	#define sb_maxiters cx_u.cx_subst.sbu_maxiters
22e551b9	351	#define sb_rflags cx_u.cx_subst.sbu_rflags
4633a7c4	352	#define sb_oldsave cx_u.cx_subst.sbu_oldsave
71be2cbc	353	#define sb_once cx_u.cx_subst.sbu_once
71be2cbc	354	#define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
79072805 LW	355	#define sb_orig cx_u.cx_subst.sbu_orig
	356	#define sb_dstr cx_u.cx_subst.sbu_dstr
	357	#define sb_targ cx_u.cx_subst.sbu_targ
	358	#define sb_s cx_u.cx_subst.sbu_s
	359	#define sb_m cx_u.cx_subst.sbu_m
	360	#define sb_strend cx_u.cx_subst.sbu_strend
c90c0ff4	361	#define sb_rxres cx_u.cx_subst.sbu_rxres
c07a80fd	362	#define sb_rx cx_u.cx_subst.sbu_rx
79072805 LW	363
	364	#define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
	365	cx->sb_iters = iters, \
	366	cx->sb_maxiters = maxiters, \
22e551b9	367	cx->sb_rflags = r_flags, \
4633a7c4	368	cx->sb_oldsave = oldsave, \
71be2cbc	369	cx->sb_once = once, \
71be2cbc	370	cx->sb_rxtainted = rxtainted, \
79072805 LW	371	cx->sb_orig = orig, \
	372	cx->sb_dstr = dstr, \
	373	cx->sb_targ = targ, \
	374	cx->sb_s = s, \
	375	cx->sb_m = m, \
	376	cx->sb_strend = strend, \
c90c0ff4	377	cx->sb_rxres = Null(void*), \
c07a80fd	378	cx->sb_rx = rx, \
c90c0ff4	379	cx->cx_type = CXt_SUBST; \
c90c0ff4	380	rxres_save(&cx->sb_rxres, rx)
79072805	381
c90c0ff4	382	#define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \
c90c0ff4	383	rxres_free(&cx->sb_rxres)
79072805 LW	384
79072805 LW	385	struct context {
6b35e009	386	U32 cx_type; /* what kind of context this is */
79072805 LW	387	union {
	388	struct block cx_blk;
	389	struct subst cx_subst;
	390	} cx_u;
	391	};
6b35e009 GS	392
6b35e009 GS	393	#define CXTYPEMASK 0xff
79072805 LW	394	#define CXt_NULL 0
	395	#define CXt_SUB 1
	396	#define CXt_EVAL 2
	397	#define CXt_LOOP 3
	398	#define CXt_SUBST 4
	399	#define CXt_BLOCK 5
7766f137	400	#define CXt_FORMAT 6
79072805	401
6b35e009 GS	402	/* private flags for CXt_EVAL */
6b35e009 GS	403	#define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */
1d76a5c3	404	#define CXp_TRYBLOCK 0x00000200 /* eval{}, not eval'' or similar */
6b35e009	405
7766f137 GS	406	#ifdef USE_ITHREADS
	407	/* private flags for CXt_LOOP */
	408	# define CXp_PADVAR 0x00000100 /* itervar lives on pad, iterdata
	409	has pad offset; if not set,
	410	iterdata holds GV* */
	411	# define CxPADLOOP(c) (((c)->cx_type & (CXt_LOOP\|CXp_PADVAR)) \
	412	== (CXt_LOOP\|CXp_PADVAR))
	413	#endif
	414
6b35e009	415	#define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
7766f137 GS	416	#define CxREALEVAL(c) (((c)->cx_type & (CXt_EVAL\|CXp_REAL)) \
7766f137 GS	417	== (CXt_EVAL\|CXp_REAL))
1d76a5c3 GS	418	#define CxTRYBLOCK(c) (((c)->cx_type & (CXt_EVAL\|CXp_TRYBLOCK)) \
1d76a5c3 GS	419	== (CXt_EVAL\|CXp_TRYBLOCK))
6b35e009	420
79072805 LW	421	#define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
79072805 LW	422
ccfc67b7 JH	423	/*
	424	=head1 "Gimme" Values
	425	*/
954c1994 GS	426
	427	/*
	428	=for apidoc AmU\|\|G_SCALAR
	429	Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and
	430	L<perlcall>.
	431
	432	=for apidoc AmU\|\|G_ARRAY
91e74348	433	Used to indicate list context. See C<GIMME_V>, C<GIMME> and
954c1994 GS	434	L<perlcall>.
	435
	436	=for apidoc AmU\|\|G_VOID
	437	Used to indicate void context. See C<GIMME_V> and L<perlcall>.
	438
	439	=for apidoc AmU\|\|G_DISCARD
	440	Indicates that arguments returned from a callback should be discarded. See
	441	L<perlcall>.
	442
	443	=for apidoc AmU\|\|G_EVAL
	444
	445	Used to force a Perl C<eval> wrapper around a callback. See
	446	L<perlcall>.
	447
	448	=for apidoc AmU\|\|G_NOARGS
	449
	450	Indicates that no arguments are being sent to a callback. See
	451	L<perlcall>.
	452
	453	=cut
	454	*/
	455
a0d0e21e LW	456	#define G_SCALAR 0
a0d0e21e LW	457	#define G_ARRAY 1
54310121	458	#define G_VOID 128 /* skip this bit when adding flags below */
79072805	459
864dbfa3	460	/* extra flags for Perl_call_* routines */
a0d0e21e LW	461	#define G_DISCARD 2 /* Call FREETMPS. */
	462	#define G_EVAL 4 /* Assume eval {} around subroutine call. */
	463	#define G_NOARGS 8 /* Don't construct a @_ array. */
54310121	464	#define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */
491527d0	465	#define G_NODEBUG 32 /* Disable debugging at toplevel. */
968b3946	466	#define G_METHOD 64 /* Calling method. */
e336de0d	467
faef0170 HS	468	/* flag bits for PL_in_eval */
	469	#define EVAL_NULL 0 /* not in an eval */
	470	#define EVAL_INEVAL 1 /* some enclosing scope is an eval */
	471	#define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
864dbfa3	472	#define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */
6dc8a9e4	473	#define EVAL_INREQUIRE 8 /* The code is being required. */
faef0170	474
e336de0d GS	475	/* Support for switching (stack and block) contexts.
	476	* This ensures magic doesn't invalidate local stack and cx pointers.
	477	*/
	478
e788e7d3 GS	479	#define PERLSI_UNKNOWN -1
	480	#define PERLSI_UNDEF 0
	481	#define PERLSI_MAIN 1
	482	#define PERLSI_MAGIC 2
	483	#define PERLSI_SORT 3
	484	#define PERLSI_SIGNAL 4
	485	#define PERLSI_OVERLOAD 5
	486	#define PERLSI_DESTROY 6
	487	#define PERLSI_WARNHOOK 7
	488	#define PERLSI_DIEHOOK 8
	489	#define PERLSI_REQUIRE 9
e336de0d GS	490
	491	struct stackinfo {
	492	AV * si_stack; /* stack for current runlevel */
	493	PERL_CONTEXT * si_cxstack; /* context stack for runlevel */
	494	I32 si_cxix; /* current context index */
	495	I32 si_cxmax; /* maximum allocated index */
	496	I32 si_type; /* type of runlevel */
	497	struct stackinfo * si_prev;
	498	struct stackinfo * si_next;
ce2f7c3b	499	I32 si_markoff; /* offset where markstack begins for us.
e336de0d GS	500	* currently used only with DEBUGGING,
	501	* but not #ifdef-ed for bincompat */
	502	};
	503
	504	typedef struct stackinfo PERL_SI;
	505
3280af22 NIS	506	#define cxstack (PL_curstackinfo->si_cxstack)
	507	#define cxstack_ix (PL_curstackinfo->si_cxix)
	508	#define cxstack_max (PL_curstackinfo->si_cxmax)
e336de0d GS	509
e336de0d GS	510	#ifdef DEBUGGING
ce2f7c3b GS	511	# define SET_MARK_OFFSET \
ce2f7c3b GS	512	PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
e336de0d	513	#else
ce2f7c3b	514	# define SET_MARK_OFFSET NOOP
e336de0d GS	515	#endif
e336de0d GS	516
d3acc0f7	517	#define PUSHSTACKi(type) \
e336de0d	518	STMT_START { \
3280af22	519	PERL_SI *next = PL_curstackinfo->si_next; \
e336de0d GS	520	if (!next) { \
e336de0d GS	521	next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \
3280af22 NIS	522	next->si_prev = PL_curstackinfo; \
3280af22 NIS	523	PL_curstackinfo->si_next = next; \
e336de0d GS	524	} \
	525	next->si_type = type; \
	526	next->si_cxix = -1; \
	527	AvFILLp(next->si_stack) = 0; \
3280af22 NIS	528	SWITCHSTACK(PL_curstack,next->si_stack); \
3280af22 NIS	529	PL_curstackinfo = next; \
ce2f7c3b	530	SET_MARK_OFFSET; \
e336de0d GS	531	} STMT_END
e336de0d GS	532
e788e7d3	533	#define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)
d3acc0f7	534
3095d977 GS	535	/* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
3095d977 GS	536	* PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
d3acc0f7	537	#define POPSTACK \
e336de0d	538	STMT_START { \
39644a26	539	dSP; \
3280af22	540	PERL_SI *prev = PL_curstackinfo->si_prev; \
e336de0d	541	if (!prev) { \
bf49b057	542	PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \
e336de0d GS	543	my_exit(1); \
e336de0d GS	544	} \
3280af22	545	SWITCHSTACK(PL_curstack,prev->si_stack); \
e336de0d	546	/* don't free prev here, free them all at the END{} */ \
3280af22	547	PL_curstackinfo = prev; \
e336de0d GS	548	} STMT_END
	549
	550	#define POPSTACK_TO(s) \
	551	STMT_START { \
3280af22	552	while (PL_curstack != s) { \
bac4b2ad	553	dounwind(-1); \
d3acc0f7	554	POPSTACK; \
bac4b2ad	555	} \
e336de0d	556	} STMT_END