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/* mg.h
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
* 2000, 2002, 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.
*
*/
struct mgvtbl {
int (*svt_get) (pTHX_ SV *sv, MAGIC* mg);
int (*svt_set) (pTHX_ SV *sv, MAGIC* mg);
U32 (*svt_len) (pTHX_ SV *sv, MAGIC* mg);
int (*svt_clear) (pTHX_ SV *sv, MAGIC* mg);
int (*svt_free) (pTHX_ SV *sv, MAGIC* mg);
int (*svt_copy) (pTHX_ SV *sv, MAGIC* mg,
SV *nsv, const char *name, I32 namlen);
int (*svt_dup) (pTHX_ MAGIC *mg, CLONE_PARAMS *param);
int (*svt_local)(pTHX_ SV *nsv, MAGIC *mg);
};
struct magic {
MAGIC* mg_moremagic;
MGVTBL* mg_virtual; /* pointer to magic functions */
U16 mg_private;
char mg_type;
U8 mg_flags;
SSize_t mg_len;
SV* mg_obj;
char* mg_ptr;
};
#define MGf_TAINTEDDIR 1 /* PERL_MAGIC_envelem only */
#define MGf_MINMATCH 1 /* PERL_MAGIC_regex_global only */
#define MGf_REQUIRE_GV 1 /* PERL_MAGIC_checkcall only */
#define MGf_REFCOUNTED 2
#define MGf_GSKIP 4 /* skip further GETs until after next SET */
#define MGf_COPY 8 /* has an svt_copy MGVTBL entry */
#define MGf_DUP 0x10 /* has an svt_dup MGVTBL entry */
#define MGf_LOCAL 0x20 /* has an svt_local MGVTBL entry */
#define MGf_BYTES 0x40 /* PERL_MAGIC_regex_global only */
#define MGf_PERSIST 0x80 /* PERL_MAGIC_lvref only */
#define MgTAINTEDDIR(mg) (mg->mg_flags & MGf_TAINTEDDIR)
#define MgTAINTEDDIR_on(mg) (mg->mg_flags |= MGf_TAINTEDDIR)
#define MgTAINTEDDIR_off(mg) (mg->mg_flags &= ~MGf_TAINTEDDIR)
/* Extracts the SV stored in mg, or NULL. */
#define MgSV(mg) (((int)((mg)->mg_len) == HEf_SVKEY) ? \
MUTABLE_SV((mg)->mg_ptr) : \
NULL)
/* If mg contains an SV, these extract the PV stored in that SV;
otherwise, these extract the mg's mg_ptr/mg_len.
These do NOT account for the SV's UTF8 flag, so handle with care.
*/
#define MgPV(mg,lp) ((((int)(lp = (mg)->mg_len)) == HEf_SVKEY) ? \
SvPV(MUTABLE_SV((mg)->mg_ptr),lp) : \
(mg)->mg_ptr)
#define MgPV_const(mg,lp) ((((int)(lp = (mg)->mg_len)) == HEf_SVKEY) ? \
SvPV_const(MUTABLE_SV((mg)->mg_ptr),lp) : \
(const char*)(mg)->mg_ptr)
#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
SvPV_nolen_const(MUTABLE_SV((mg)->mg_ptr)) : \
(const char*)(mg)->mg_ptr)
#define SvTIED_mg(sv,how) (SvRMAGICAL(sv) ? mg_find((sv),(how)) : NULL)
#define SvTIED_obj(sv,mg) \
((mg)->mg_obj ? (mg)->mg_obj : sv_2mortal(newRV(sv)))
#if defined(PERL_CORE) || defined(PERL_EXT)
# define MgBYTEPOS(mg,sv,pv,len) S_MgBYTEPOS(aTHX_ mg,sv,pv,len)
/* assumes get-magic and stringification have already occurred */
# define MgBYTEPOS_set(mg,sv,pv,off) ( \
assert_((mg)->mg_type == PERL_MAGIC_regex_global) \
SvPOK(sv) && (!SvGMAGICAL(sv) || sv_only_taint_gmagic(sv)) \
? (mg)->mg_len = (off), (mg)->mg_flags |= MGf_BYTES \
: ((mg)->mg_len = DO_UTF8(sv) \
? (SSize_t)utf8_length((U8 *)(pv), (U8 *)(pv)+(off)) \
: (SSize_t)(off), \
(mg)->mg_flags &= ~MGf_BYTES))
#endif
#define whichsig(pv) whichsig_pv(pv)
/*
* ex: set ts=8 sts=4 sw=4 et:
*/
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