lib/perl5/5.6.1/msys/CORE/mg.h

   1 /*    mg.h
   2  *
   3  *    Copyright (c) 1991-2001, Larry Wall
   4  *
   5  *    You may distribute under the terms of either the GNU General Public
   6  *    License or the Artistic License, as specified in the README file.
   7  *
   8  */
   9
  10 #ifdef STRUCT_MGVTBL_DEFINITION
  11 STRUCT_MGVTBL_DEFINITION;
  12 #else
  13 struct mgvtbl {
  14     int         (CPERLscope(*svt_get))  (pTHX_ SV *sv, MAGIC* mg);
  15     int         (CPERLscope(*svt_set))  (pTHX_ SV *sv, MAGIC* mg);
  16     U32         (CPERLscope(*svt_len))  (pTHX_ SV *sv, MAGIC* mg);
  17     int         (CPERLscope(*svt_clear))(pTHX_ SV *sv, MAGIC* mg);
  18     int         (CPERLscope(*svt_free)) (pTHX_ SV *sv, MAGIC* mg);
  19 };
  20 #endif
  21
  22 struct magic {
  23     MAGIC*      mg_moremagic;
  24     MGVTBL*     mg_virtual;     /* pointer to magic functions */
  25     U16         mg_private;
  26     char        mg_type;
  27     U8          mg_flags;
  28     SV*         mg_obj;
  29     char*       mg_ptr;
  30     I32         mg_len;
  31 };
  32
  33 #define MGf_TAINTEDDIR 1
  34 #define MGf_REFCOUNTED 2
  35 #define MGf_GSKIP      4
  36
  37 #define MGf_MINMATCH   1
  38
  39 #define MgTAINTEDDIR(mg)        (mg->mg_flags & MGf_TAINTEDDIR)
  40 #define MgTAINTEDDIR_on(mg)     (mg->mg_flags |= MGf_TAINTEDDIR)
  41 #define MgTAINTEDDIR_off(mg)    (mg->mg_flags &= ~MGf_TAINTEDDIR)
  42
  43 #define MgPV(mg,lp)             ((((int)(lp = (mg)->mg_len)) == HEf_SVKEY) ?   \
  44                                  SvPV((SV*)((mg)->mg_ptr),lp) :         \
  45                                  (mg)->mg_ptr)
  46
  47 #define SvTIED_mg(sv,how) \
  48     (SvRMAGICAL(sv) ? mg_find((sv),(how)) : Null(MAGIC*))
  49 #define SvTIED_obj(sv,mg) \
  50     ((mg)->mg_obj ? (mg)->mg_obj : sv_2mortal(newRV(sv)))