90 lines
3.6 KiB
C
90 lines
3.6 KiB
C
/* mg.h
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*
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* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
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* 2000, 2002, 2005, 2006, 2007, 2008 by Larry Wall and others
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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*/
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struct mgvtbl {
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int (*svt_get) (pTHX_ SV *sv, MAGIC* mg);
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int (*svt_set) (pTHX_ SV *sv, MAGIC* mg);
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U32 (*svt_len) (pTHX_ SV *sv, MAGIC* mg);
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int (*svt_clear) (pTHX_ SV *sv, MAGIC* mg);
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int (*svt_free) (pTHX_ SV *sv, MAGIC* mg);
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int (*svt_copy) (pTHX_ SV *sv, MAGIC* mg,
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SV *nsv, const char *name, I32 namlen);
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int (*svt_dup) (pTHX_ MAGIC *mg, CLONE_PARAMS *param);
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int (*svt_local)(pTHX_ SV *nsv, MAGIC *mg);
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};
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struct magic {
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MAGIC* mg_moremagic;
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MGVTBL* mg_virtual; /* pointer to magic functions */
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U16 mg_private;
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char mg_type;
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U8 mg_flags;
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SSize_t mg_len;
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SV* mg_obj;
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char* mg_ptr;
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};
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#define MGf_TAINTEDDIR 1 /* PERL_MAGIC_envelem only */
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#define MGf_MINMATCH 1 /* PERL_MAGIC_regex_global only */
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#define MGf_REQUIRE_GV 1 /* PERL_MAGIC_checkcall only */
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#define MGf_REFCOUNTED 2
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#define MGf_GSKIP 4 /* skip further GETs until after next SET */
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#define MGf_COPY 8 /* has an svt_copy MGVTBL entry */
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#define MGf_DUP 0x10 /* has an svt_dup MGVTBL entry */
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#define MGf_LOCAL 0x20 /* has an svt_local MGVTBL entry */
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#define MGf_BYTES 0x40 /* PERL_MAGIC_regex_global only */
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#define MGf_PERSIST 0x80 /* PERL_MAGIC_lvref only */
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#define MgTAINTEDDIR(mg) (mg->mg_flags & MGf_TAINTEDDIR)
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#define MgTAINTEDDIR_on(mg) (mg->mg_flags |= MGf_TAINTEDDIR)
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#define MgTAINTEDDIR_off(mg) (mg->mg_flags &= ~MGf_TAINTEDDIR)
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/* Extracts the SV stored in mg, or NULL. */
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#define MgSV(mg) (((int)((mg)->mg_len) == HEf_SVKEY) ? \
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MUTABLE_SV((mg)->mg_ptr) : \
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NULL)
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/* If mg contains an SV, these extract the PV stored in that SV;
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otherwise, these extract the mg's mg_ptr/mg_len.
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These do NOT account for the SV's UTF8 flag, so handle with care.
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*/
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#define MgPV(mg,lp) ((((int)(lp = (mg)->mg_len)) == HEf_SVKEY) ? \
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SvPV(MUTABLE_SV((mg)->mg_ptr),lp) : \
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(mg)->mg_ptr)
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#define MgPV_const(mg,lp) ((((int)(lp = (mg)->mg_len)) == HEf_SVKEY) ? \
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SvPV_const(MUTABLE_SV((mg)->mg_ptr),lp) : \
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(const char*)(mg)->mg_ptr)
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#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
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SvPV_nolen_const(MUTABLE_SV((mg)->mg_ptr)) : \
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(const char*)(mg)->mg_ptr)
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#define SvTIED_mg(sv,how) (SvRMAGICAL(sv) ? mg_find((sv),(how)) : NULL)
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#define SvTIED_obj(sv,mg) \
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((mg)->mg_obj ? (mg)->mg_obj : sv_2mortal(newRV(sv)))
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#if defined(PERL_CORE) || defined(PERL_EXT)
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# define MgBYTEPOS(mg,sv,pv,len) S_MgBYTEPOS(aTHX_ mg,sv,pv,len)
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/* assumes get-magic and stringification have already occurred */
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# define MgBYTEPOS_set(mg,sv,pv,off) ( \
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assert_((mg)->mg_type == PERL_MAGIC_regex_global) \
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SvPOK(sv) && (!SvGMAGICAL(sv) || sv_only_taint_gmagic(sv)) \
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? (mg)->mg_len = (off), (mg)->mg_flags |= MGf_BYTES \
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: ((mg)->mg_len = DO_UTF8(sv) \
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? (SSize_t)utf8_length((U8 *)(pv), (U8 *)(pv)+(off)) \
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: (SSize_t)(off), \
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(mg)->mg_flags &= ~MGf_BYTES))
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#endif
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#define whichsig(pv) whichsig_pv(pv)
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/*
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* ex: set ts=8 sts=4 sw=4 et:
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*/
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