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Add MgPV_const
[perl5.git] / mg.h
... / ...
CommitLineData
1/* mg.h
2 *
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
4 * 2000, 2002, 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 */
10
11#ifdef STRUCT_MGVTBL_DEFINITION
12STRUCT_MGVTBL_DEFINITION;
13#else
14struct mgvtbl {
15 int (CPERLscope(*svt_get)) (pTHX_ SV *sv, MAGIC* mg);
16 int (CPERLscope(*svt_set)) (pTHX_ SV *sv, MAGIC* mg);
17 U32 (CPERLscope(*svt_len)) (pTHX_ SV *sv, MAGIC* mg);
18 int (CPERLscope(*svt_clear))(pTHX_ SV *sv, MAGIC* mg);
19 int (CPERLscope(*svt_free)) (pTHX_ SV *sv, MAGIC* mg);
20 int (CPERLscope(*svt_copy)) (pTHX_ SV *sv, MAGIC* mg,
21 SV *nsv, const char *name, int namlen);
22 int (CPERLscope(*svt_dup)) (pTHX_ MAGIC *mg, CLONE_PARAMS *param);
23};
24#endif
25
26struct magic {
27 MAGIC* mg_moremagic;
28 const MGVTBL* mg_virtual; /* pointer to magic functions */
29 U16 mg_private;
30 char mg_type;
31 U8 mg_flags;
32 SV* mg_obj;
33 char* mg_ptr;
34 I32 mg_len;
35};
36
37#define MGf_TAINTEDDIR 1 /* PERL_MAGIC_envelem only */
38#define MGf_MINMATCH 1 /* PERL_MAGIC_regex_global only */
39#define MGf_REFCOUNTED 2
40#define MGf_GSKIP 4
41#define MGf_COPY 8
42#define MGf_DUP 16
43
44#define MgTAINTEDDIR(mg) (mg->mg_flags & MGf_TAINTEDDIR)
45#define MgTAINTEDDIR_on(mg) (mg->mg_flags |= MGf_TAINTEDDIR)
46#define MgTAINTEDDIR_off(mg) (mg->mg_flags &= ~MGf_TAINTEDDIR)
47
48#define MgPV(mg,lp) ((((int)(lp = (mg)->mg_len)) == HEf_SVKEY) ? \
49 SvPV((SV*)((mg)->mg_ptr),lp) : \
50 (mg)->mg_ptr)
51#define MgPV_const(mg,lp) ((((int)(lp = (mg)->mg_len)) == HEf_SVKEY) ? \
52 SvPV_const((SV*)((mg)->mg_ptr),lp) : \
53 (const char*)(mg)->mg_ptr)
54
55#define SvTIED_mg(sv,how) \
56 (SvRMAGICAL(sv) ? mg_find((sv),(how)) : Null(MAGIC*))
57#define SvTIED_obj(sv,mg) \
58 ((mg)->mg_obj ? (mg)->mg_obj : sv_2mortal(newRV(sv)))