xref: /onnv-gate/usr/src/cmd/perl/5.8.4/distrib/mg.h (revision 0:68f95e015346)
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
12 STRUCT_MGVTBL_DEFINITION;
13 #else
14 struct 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 
26 struct magic {
27     MAGIC*	mg_moremagic;
28     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 
52 #define SvTIED_mg(sv,how) \
53     (SvRMAGICAL(sv) ? mg_find((sv),(how)) : Null(MAGIC*))
54 #define SvTIED_obj(sv,mg) \
55     ((mg)->mg_obj ? (mg)->mg_obj : sv_2mortal(newRV(sv)))
56