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perl5.git.perl.org Git - perl5.git/blob - mg.h
1 /* mg.h
2 *
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
4 * 2000, 2002, 2005, 2006, 2007, 2008 by Larry Wall and others
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
11 struct mgvtbl {
12 int (*svt_get) (pTHX_ SV *sv, MAGIC* mg);
13 int (*svt_set) (pTHX_ SV *sv, MAGIC* mg);
14 U32 (*svt_len) (pTHX_ SV *sv, MAGIC* mg);
15 int (*svt_clear) (pTHX_ SV *sv, MAGIC* mg);
16 int (*svt_free) (pTHX_ SV *sv, MAGIC* mg);
17 int (*svt_copy) (pTHX_ SV *sv, MAGIC* mg,
18 SV *nsv, const char *name, I32 namlen);
19 int (*svt_dup) (pTHX_ MAGIC *mg, CLONE_PARAMS *param);
20 int (*svt_local)(pTHX_ SV *nsv, MAGIC *mg);
21 };
23 struct magic {
24 MAGIC* mg_moremagic;
25 MGVTBL* mg_virtual; /* pointer to magic functions */
26 U16 mg_private;
27 char mg_type;
28 U8 mg_flags;
29 SSize_t mg_len;
30 SV* mg_obj;
31 char* mg_ptr;
32 };
34 #define MGf_TAINTEDDIR 1 /* PERL_MAGIC_envelem only */
35 #define MGf_MINMATCH 1 /* PERL_MAGIC_regex_global only */
36 #define MGf_REQUIRE_GV 1 /* PERL_MAGIC_checkcall only */
37 #define MGf_REFCOUNTED 2
38 #define MGf_GSKIP 4 /* skip further GETs until after next SET */
39 #define MGf_COPY 8 /* has an svt_copy MGVTBL entry */
40 #define MGf_DUP 0x10 /* has an svt_dup MGVTBL entry */
41 #define MGf_LOCAL 0x20 /* has an svt_local MGVTBL entry */
42 #define MGf_BYTES 0x40 /* PERL_MAGIC_regex_global only */
43 #define MGf_PERSIST 0x80 /* PERL_MAGIC_lvref only */
45 #define MgTAINTEDDIR(mg) (mg->mg_flags & MGf_TAINTEDDIR)
46 #define MgTAINTEDDIR_on(mg) (mg->mg_flags |= MGf_TAINTEDDIR)
47 #define MgTAINTEDDIR_off(mg) (mg->mg_flags &= ~MGf_TAINTEDDIR)
49 #define MgPV(mg,lp) ((((int)(lp = (mg)->mg_len)) == HEf_SVKEY) ? \
50 SvPV(MUTABLE_SV((mg)->mg_ptr),lp) : \
51 (mg)->mg_ptr)
52 #define MgPV_const(mg,lp) ((((int)(lp = (mg)->mg_len)) == HEf_SVKEY) ? \
53 SvPV_const(MUTABLE_SV((mg)->mg_ptr),lp) : \
54 (const char*)(mg)->mg_ptr)
55 #define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
56 SvPV_nolen_const(MUTABLE_SV((mg)->mg_ptr)) : \
57 (const char*)(mg)->mg_ptr)
59 #define SvTIED_mg(sv,how) (SvRMAGICAL(sv) ? mg_find((sv),(how)) : NULL)
60 #define SvTIED_obj(sv,mg) \
61 ((mg)->mg_obj ? (mg)->mg_obj : sv_2mortal(newRV(sv)))
63 #if defined(PERL_CORE) || defined(PERL_EXT)
64 # define MgBYTEPOS(mg,sv,pv,len) S_MgBYTEPOS(aTHX_ mg,sv,pv,len)
65 /* assumes get-magic and stringification have already occurred */
66 # define MgBYTEPOS_set(mg,sv,pv,off) ( \
67 assert_((mg)->mg_type == PERL_MAGIC_regex_global) \
68 SvPOK(sv) && (!SvGMAGICAL(sv) || sv_only_taint_gmagic(sv)) \
69 ? (mg)->mg_len = (off), (mg)->mg_flags |= MGf_BYTES \
70 : ((mg)->mg_len = DO_UTF8(sv) \
71 ? (SSize_t)utf8_length((U8 *)(pv), (U8 *)(pv)+(off)) \
72 : (SSize_t)(off), \
73 (mg)->mg_flags &= ~MGf_BYTES))
74 #endif
76 #define whichsig(pv) whichsig_pv(pv)
78 /*
79 * ex: set ts=8 sts=4 sw=4 et:
80 */