op.h

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#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.
 */
#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 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

/* 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
#define PERL_LOADMOD_NOIMPORT		0x2
#define PERL_LOADMOD_IMPORT_OPS		0x4

#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:
 */