/* This file is part of the Variable::Magic Perl module.
* See http://search.cpan.org/dist/Variable-Magic/ */
#include <stdarg.h> /* <va_list>, va_{start,arg,end}, ... */
#include <stdio.h> /* sprintf() */
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#define __PACKAGE__ "Variable::Magic"
#ifndef VMG_PERL_PATCHLEVEL
# ifdef PERL_PATCHNUM
# define VMG_PERL_PATCHLEVEL PERL_PATCHNUM
# else
# define VMG_PERL_PATCHLEVEL 0
# endif
#endif
#define VMG_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
#define VMG_HAS_PERL_BRANCH(R, V, S) (PERL_REVISION == (R) && PERL_VERSION == (V) && PERL_SUBVERSION >= (S))
#define VMG_HAS_PERL_MAINT(R, V, S, P) (PERL_REVISION == (R) && PERL_VERSION == (V) && (VMG_PERL_PATCHLEVEL >= (P) || (!VMG_PERL_PATCHLEVEL && PERL_SUBVERSION >= (S))))
/* --- Threads and multiplicity -------------------------------------------- */
#ifndef NOOP
# define NOOP
#endif
#ifndef dNOOP
# define dNOOP
#endif
/* Safe unless stated otherwise in Makefile.PL */
#ifndef VMG_FORKSAFE
# define VMG_FORKSAFE 1
#endif
#ifndef VMG_MULTIPLICITY
# if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
# define VMG_MULTIPLICITY 1
# else
# define VMG_MULTIPLICITY 0
# endif
#endif
#if VMG_MULTIPLICITY && !defined(tTHX)
# define tTHX PerlInterpreter*
#endif
#if VMG_MULTIPLICITY && defined(USE_ITHREADS) && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && (defined(MY_CXT_CLONE) || defined(dMY_CXT_SV))
# define VMG_THREADSAFE 1
# ifndef MY_CXT_CLONE
# define MY_CXT_CLONE \
dMY_CXT_SV; \
my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
# endif
#else
# define VMG_THREADSAFE 0
# undef dMY_CXT
# define dMY_CXT dNOOP
# undef MY_CXT
# define MY_CXT vmg_globaldata
# undef START_MY_CXT
# define START_MY_CXT STATIC my_cxt_t MY_CXT;
# undef MY_CXT_INIT
# define MY_CXT_INIT NOOP
# undef MY_CXT_CLONE
# define MY_CXT_CLONE NOOP
#endif
#if VMG_THREADSAFE
STATIC SV *vmg_clone(pTHX_ SV *sv, tTHX owner) {
#define vmg_clone(P, O) vmg_clone(aTHX_ (P), (O))
SV *dupsv;
#if VMG_HAS_PERL(5, 13, 2)
CLONE_PARAMS *param = Perl_clone_params_new(owner, aTHX);
dupsv = sv_dup(sv, param);
Perl_clone_params_del(param);
#else
CLONE_PARAMS param;
param.stashes = NULL; /* don't need it unless sv is a PVHV */
param.flags = 0;
param.proto_perl = owner;
dupsv = sv_dup(sv, ¶m);
#endif
return SvREFCNT_inc(dupsv);
}
#endif /* VMG_THREADSAFE */
/* --- Compatibility ------------------------------------------------------- */
#ifndef Newx
# define Newx(v, n, c) New(0, v, n, c)
#endif
#ifndef SvMAGIC_set
# define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
#endif
#ifndef SvRV_const
# define SvRV_const(sv) SvRV((SV *) sv)
#endif
#ifndef SvREFCNT_inc_simple_void
# define SvREFCNT_inc_simple_void(sv) SvREFCNT_inc(sv)
#endif
#ifndef mPUSHu
# define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
#endif
#ifndef PERL_MAGIC_ext
# define PERL_MAGIC_ext '~'
#endif
#ifndef PERL_MAGIC_tied
# define PERL_MAGIC_tied 'P'
#endif
#ifndef MGf_COPY
# define MGf_COPY 0
#endif
#ifndef MGf_DUP
# define MGf_DUP 0
#endif
#ifndef MGf_LOCAL
# define MGf_LOCAL 0
#endif
#ifndef IN_PERL_COMPILETIME
# define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
#endif
/* uvar magic and Hash::Util::FieldHash were commited with 28419, but we only
* enable them on 5.10 */
#if VMG_HAS_PERL(5, 10, 0)
# define VMG_UVAR 1
#else
# define VMG_UVAR 0
#endif
/* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160, partially
* reverted to dev-5.11 as 9cdcb38b */
#if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0)
# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
/* This branch should only apply for perls before the official 5.11.0 release.
* Makefile.PL takes care of the higher ones. */
# define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
# endif
# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
# define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 1
# endif
#else
# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
# define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
# endif
# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
# define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 0
# endif
#endif
/* Applied to dev-5.11 as 34908 */
#if VMG_HAS_PERL_MAINT(5, 11, 0, 34908) || VMG_HAS_PERL(5, 12, 0)
# define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
#else
# define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
#endif
/* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
#if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
# define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
#else
# define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
#endif
#if VMG_HAS_PERL_MAINT(5, 11, 0, 32969) || VMG_HAS_PERL(5, 12, 0)
# define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
#else
# define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
#endif
#if VMG_HAS_PERL(5, 13, 2)
# define VMG_COMPAT_GLOB_GET 1
#else
# define VMG_COMPAT_GLOB_GET 0
#endif
/* ... Bug-free mg_magical ................................................. */
/* See the discussion at http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html. This version is specialized to our needs. */
#if VMG_UVAR
STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
#define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
const MAGIC* mg;
sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
/* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
if ((mg = SvMAGIC(sv))) {
SvRMAGICAL_off(sv);
do {
const MGVTBL* const vtbl = mg->mg_virtual;
if (vtbl) {
if (vtbl->svt_clear) {
SvRMAGICAL_on(sv);
break;
}
}
} while ((mg = mg->mg_moremagic));
}
}
#endif /* VMG_UVAR */
/* ... Safe version of call_sv() ........................................... */
#define VMG_SAVE_LAST_CX (!VMG_HAS_PERL(5, 8, 4) || VMG_HAS_PERL(5, 9, 5))
STATIC I32 vmg_call_sv(pTHX_ SV *sv, I32 flags, I32 destructor) {
#define vmg_call_sv(S, F, D) vmg_call_sv(aTHX_ (S), (F), (D))
I32 ret, cxix = 0, in_eval = 0;
#if VMG_SAVE_LAST_CX
PERL_CONTEXT saved_cx;
#endif
SV *old_err = NULL;
if (SvTRUE(ERRSV)) {
old_err = ERRSV;
ERRSV = newSV(0);
}
if (cxstack_ix < cxstack_max) {
cxix = cxstack_ix + 1;
if (destructor && CxTYPE(cxstack + cxix) == CXt_EVAL)
in_eval = 1;
}
#if VMG_SAVE_LAST_CX
/* The last popped context will be reused by call_sv(), but our callers may
* still need its previous value. Back it up so that it isn't clobbered. */
saved_cx = cxstack[cxix];
#endif
ret = call_sv(sv, flags | G_EVAL);
#if VMG_SAVE_LAST_CX
cxstack[cxix] = saved_cx;
#endif
if (SvTRUE(ERRSV)) {
if (old_err) {
sv_setsv(old_err, ERRSV);
SvREFCNT_dec(ERRSV);
ERRSV = old_err;
}
if (IN_PERL_COMPILETIME) {
if (!PL_in_eval) {
if (PL_errors)
sv_catsv(PL_errors, ERRSV);
else
Perl_warn(aTHX_ "%s", SvPV_nolen(ERRSV));
SvCUR_set(ERRSV, 0);
}
#if VMG_HAS_PERL(5, 10, 0) || defined(PL_parser)
if (PL_parser)
++PL_parser->error_count;
#elif defined(PL_error_count)
++PL_error_count;
#else
++PL_Ierror_count;
#endif
} else if (!in_eval)
croak(NULL);
} else {
if (old_err) {
SvREFCNT_dec(ERRSV);
ERRSV = old_err;
}
}
return ret;
}
/* --- Stolen chunk of B --------------------------------------------------- */
typedef enum {
OPc_NULL = 0,
OPc_BASEOP = 1,
OPc_UNOP = 2,
OPc_BINOP = 3,
OPc_LOGOP = 4,
OPc_LISTOP = 5,
OPc_PMOP = 6,
OPc_SVOP = 7,
OPc_PADOP = 8,
OPc_PVOP = 9,
OPc_LOOP = 10,
OPc_COP = 11,
OPc_MAX = 12
} opclass;
STATIC const char *const vmg_opclassnames[] = {
"B::NULL",
"B::OP",
"B::UNOP",
"B::BINOP",
"B::LOGOP",
"B::LISTOP",
"B::PMOP",
"B::SVOP",
"B::PADOP",
"B::PVOP",
"B::LOOP",
"B::COP"
};
STATIC opclass vmg_opclass(const OP *o) {
#if 0
if (!o)
return OPc_NULL;
#endif
if (o->op_type == 0)
return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
if (o->op_type == OP_SASSIGN)
return ((o->op_private & OPpASSIGN_BACKWARDS) ? OPc_UNOP : OPc_BINOP);
if (o->op_type == OP_AELEMFAST) {
if (o->op_flags & OPf_SPECIAL)
return OPc_BASEOP;
else
#ifdef USE_ITHREADS
return OPc_PADOP;
#else
return OPc_SVOP;
#endif
}
#ifdef USE_ITHREADS
if (o->op_type == OP_GV || o->op_type == OP_GVSV || o->op_type == OP_RCATLINE)
return OPc_PADOP;
#endif
switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
case OA_BASEOP:
return OPc_BASEOP;
case OA_UNOP:
return OPc_UNOP;
case OA_BINOP:
return OPc_BINOP;
case OA_LOGOP:
return OPc_LOGOP;
case OA_LISTOP:
return OPc_LISTOP;
case OA_PMOP:
return OPc_PMOP;
case OA_SVOP:
return OPc_SVOP;
case OA_PADOP:
return OPc_PADOP;
case OA_PVOP_OR_SVOP:
return (o->op_private & (OPpTRANS_TO_UTF|OPpTRANS_FROM_UTF)) ? OPc_SVOP : OPc_PVOP;
case OA_LOOP:
return OPc_LOOP;
case OA_COP:
return OPc_COP;
case OA_BASEOP_OR_UNOP:
return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
case OA_FILESTATOP:
return ((o->op_flags & OPf_KIDS) ? OPc_UNOP :
#ifdef USE_ITHREADS
(o->op_flags & OPf_REF) ? OPc_PADOP : OPc_BASEOP);
#else
(o->op_flags & OPf_REF) ? OPc_SVOP : OPc_BASEOP);
#endif
case OA_LOOPEXOP:
if (o->op_flags & OPf_STACKED)
return OPc_UNOP;
else if (o->op_flags & OPf_SPECIAL)
return OPc_BASEOP;
else
return OPc_PVOP;
}
return OPc_BASEOP;
}
/* --- Error messages ------------------------------------------------------ */
STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
/* --- Signatures ---------------------------------------------------------- */
#define SIG_WZO ((U16) (0x3891))
#define SIG_WIZ ((U16) (0x3892))
/* --- MGWIZ structure ----------------------------------------------------- */
typedef struct {
MGVTBL *vtbl;
U8 opinfo;
U8 uvar;
SV *cb_data;
SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
#if MGf_COPY
SV *cb_copy;
#endif /* MGf_COPY */
#if MGf_DUP
SV *cb_dup;
#endif /* MGf_DUP */
#if MGf_LOCAL
SV *cb_local;
#endif /* MGf_LOCAL */
#if VMG_UVAR
SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
#endif /* VMG_UVAR */
#if VMG_MULTIPLICITY
tTHX owner;
#endif /* VMG_MULTIPLICITY */
} MGWIZ;
STATIC void vmg_mgwiz_free(pTHX_ MGWIZ *w) {
#define vmg_mgwiz_free(W) vmg_mgwiz_free(aTHX_ (W))
if (!w)
return;
if (w->cb_data) SvREFCNT_dec(w->cb_data);
if (w->cb_get) SvREFCNT_dec(w->cb_get);
if (w->cb_set) SvREFCNT_dec(w->cb_set);
if (w->cb_len) SvREFCNT_dec(w->cb_len);
if (w->cb_clear) SvREFCNT_dec(w->cb_clear);
if (w->cb_free) SvREFCNT_dec(w->cb_free);
#if MGf_COPY
if (w->cb_copy) SvREFCNT_dec(w->cb_copy);
#endif /* MGf_COPY */
#if 0 /* MGf_DUP */
if (w->cb_dup) SvREFCNT_dec(w->cb_dup);
#endif /* MGf_DUP */
#if MGf_LOCAL
if (w->cb_local) SvREFCNT_dec(w->cb_local);
#endif /* MGf_LOCAL */
#if VMG_UVAR
if (w->cb_fetch) SvREFCNT_dec(w->cb_fetch);
if (w->cb_store) SvREFCNT_dec(w->cb_store);
if (w->cb_exists) SvREFCNT_dec(w->cb_exists);
if (w->cb_delete) SvREFCNT_dec(w->cb_delete);
#endif /* VMG_UVAR */
Safefree(w->vtbl);
Safefree(w);
return;
}
#if VMG_THREADSAFE
#define VMG_CLONE_CB(N) \
z->cb_ ## N = (w->cb_ ## N) ? vmg_clone(w->cb_ ## N, w->owner) \
: NULL;
STATIC MGWIZ *vmg_mgwiz_clone(pTHX_ const MGWIZ *w) {
#define vmg_mgwiz_clone(W) vmg_mgwiz_clone(aTHX_ (W))
MGVTBL *t;
MGWIZ *z;
if (!w)
return NULL;
Newx(t, 1, MGVTBL);
Copy(w->vtbl, t, 1, MGVTBL);
Newx(z, 1, MGWIZ);
z->vtbl = t;
z->uvar = w->uvar;
z->opinfo = w->opinfo;
VMG_CLONE_CB(data);
VMG_CLONE_CB(get);
VMG_CLONE_CB(set);
VMG_CLONE_CB(len);
VMG_CLONE_CB(clear);
VMG_CLONE_CB(free);
#if MGf_COPY
VMG_CLONE_CB(copy);
#endif /* MGf_COPY */
#if MGf_DUP
VMG_CLONE_CB(dup);
#endif /* MGf_DUP */
#if MGf_LOCAL
VMG_CLONE_CB(local);
#endif /* MGf_LOCAL */
#if VMG_UVAR
VMG_CLONE_CB(fetch);
VMG_CLONE_CB(store);
VMG_CLONE_CB(exists);
VMG_CLONE_CB(delete);
#endif /* VMG_UVAR */
z->owner = aTHX;
return z;
}
#endif /* VMG_THREADSAFE */
/* --- Context-safe global data -------------------------------------------- */
#if VMG_THREADSAFE
#define PTABLE_NAME ptable
#define PTABLE_VAL_FREE(V) vmg_mgwiz_free(V)
#define pPTBL pTHX
#define pPTBL_ pTHX_
#define aPTBL aTHX
#define aPTBL_ aTHX_
#include "ptable.h"
#define ptable_store(T, K, V) ptable_store(aTHX_ (T), (K), (V))
#define ptable_clear(T) ptable_clear(aTHX_ (T))
#define ptable_free(T) ptable_free(aTHX_ (T))
#endif /* VMG_THREADSAFE */
#define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
typedef struct {
#if VMG_THREADSAFE
ptable *wizards;
tTHX owner;
#endif
HV *b__op_stashes[OPc_MAX];
} my_cxt_t;
START_MY_CXT
#if VMG_THREADSAFE
STATIC void vmg_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
my_cxt_t *ud = ud_;
MGWIZ *w;
if (ud->owner == aTHX)
return;
w = vmg_mgwiz_clone(ent->val);
if (w)
ptable_store(ud->wizards, ent->key, w);
}
#endif /* VMG_THREADSAFE */
/* --- Wizard objects ------------------------------------------------------ */
STATIC int vmg_wizard_free(pTHX_ SV *sv, MAGIC *mg);
STATIC MGVTBL vmg_wizard_vtbl = {
NULL, /* get */
NULL, /* set */
NULL, /* len */
NULL, /* clear */
vmg_wizard_free, /* free */
#if MGf_COPY
NULL, /* copy */
#endif /* MGf_COPY */
#if MGf_DUP
NULL, /* dup */
#endif /* MGf_DUP */
#if MGf_LOCAL
NULL, /* local */
#endif /* MGf_LOCAL */
};
/* ... Wizard constructor .................................................. */
STATIC SV *vmg_wizard_new(pTHX_ const MGWIZ *w) {
#define vmg_wizard_new(W) vmg_wizard_new(aTHX_ (W))
SV *wiz = newSVuv(PTR2IV(w));
if (w) {
MAGIC *mg = sv_magicext(wiz, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
mg->mg_private = SIG_WZO;
}
SvREADONLY_on(wiz);
return wiz;
}
STATIC const SV *vmg_wizard_validate(pTHX_ const SV *wiz) {
#define vmg_wizard_validate(W) vmg_wizard_validate(aTHX_ (W))
if (SvROK(wiz)) {
wiz = SvRV_const(wiz);
if (SvIOK(wiz))
return wiz;
}
croak(vmg_invalid_wiz);
/* Not reached */
return NULL;
}
#define vmg_wizard_id(W) SvIVX((const SV *) (W))
#define vmg_wizard_main_mgwiz(W) INT2PTR(const MGWIZ *, vmg_wizard_id(W))
/* ... Wizard destructor ................................................... */
STATIC int vmg_wizard_free(pTHX_ SV *sv, MAGIC *mg) {
MGWIZ *w;
if (PL_dirty) /* During global destruction, the context is already freed */
return 0;
w = (MGWIZ *) vmg_wizard_main_mgwiz(sv);
#if VMG_THREADSAFE
{
dMY_CXT;
ptable_store(MY_CXT.wizards, w, NULL);
}
#else /* VMG_THREADSAFE */
vmg_mgwiz_free(w);
#endif /* !VMG_THREADSAFE */
return 0;
}
#if VMG_THREADSAFE
STATIC const MGWIZ *vmg_wizard_mgwiz(pTHX_ const SV *wiz) {
#define vmg_wizard_mgwiz(W) vmg_wizard_mgwiz(aTHX_ ((const SV *) (W)))
const MGWIZ *w;
w = vmg_wizard_main_mgwiz(wiz);
if (w->owner == aTHX)
return w;
{
dMY_CXT;
return ptable_fetch(MY_CXT.wizards, w);
}
}
#else /* VMG_THREADSAFE */
#define vmg_wizard_mgwiz(W) vmg_wizard_main_mgwiz(W)
#endif /* !VMG_THREADSAFE */
/* --- User-level functions implementation --------------------------------- */
STATIC const MAGIC *vmg_find(const SV *sv, const SV *wiz) {
const MAGIC *mg, *moremagic;
IV wid;
if (SvTYPE(sv) < SVt_PVMG)
return NULL;
wid = vmg_wizard_id(wiz);
for (mg = SvMAGIC(sv); mg; mg = moremagic) {
moremagic = mg->mg_moremagic;
if (mg->mg_type == PERL_MAGIC_ext && mg->mg_private == SIG_WIZ) {
IV zid = vmg_wizard_id(mg->mg_ptr);
if (zid == wid)
return mg;
}
}
return NULL;
}
/* ... Construct private data .............................................. */
STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, SV **args, I32 items) {
#define vmg_data_new(C, S, A, I) vmg_data_new(aTHX_ (C), (S), (A), (I))
I32 i;
SV *nsv;
dSP;
ENTER;
SAVETMPS;
PUSHMARK(SP);
EXTEND(SP, items + 1);
PUSHs(sv_2mortal(newRV_inc(sv)));
for (i = 0; i < items; ++i)
PUSHs(args[i]);
PUTBACK;
vmg_call_sv(ctor, G_SCALAR, 0);
SPAGAIN;
nsv = POPs;
#if VMG_HAS_PERL(5, 8, 3)
SvREFCNT_inc_simple_void(nsv); /* Or it will be destroyed in FREETMPS */
#else
nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
#endif
PUTBACK;
FREETMPS;
LEAVE;
return nsv;
}
STATIC SV *vmg_data_get(pTHX_ SV *sv, const SV *wiz) {
#define vmg_data_get(S, W) vmg_data_get(aTHX_ (S), (W))
const MAGIC *mg = vmg_find(sv, wiz);
return mg ? mg->mg_obj : NULL;
}
/* ... Magic cast/dispell .................................................. */
#if VMG_UVAR
STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
if (prevmagic) {
prevmagic->mg_moremagic = moremagic;
} else {
SvMAGIC_set(sv, moremagic);
}
mg->mg_moremagic = NULL;
Safefree(mg->mg_ptr);
Safefree(mg);
}
#endif /* VMG_UVAR */
STATIC UV vmg_cast(pTHX_ SV *sv, const SV *wiz, SV **args, I32 items) {
#define vmg_cast(S, W, A, I) vmg_cast(aTHX_ (S), (W), (A), (I))
MAGIC *mg, *moremagic = NULL;
SV *data;
const MGWIZ *w;
U32 oldgmg;
if (vmg_find(sv, wiz))
return 1;
w = vmg_wizard_mgwiz(wiz);
oldgmg = SvGMAGICAL(sv);
data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args, items) : NULL;
mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
SvREFCNT_dec(data);
mg->mg_private = SIG_WIZ;
#if MGf_COPY
if (w->cb_copy)
mg->mg_flags |= MGf_COPY;
#endif /* MGf_COPY */
#if 0 /* MGf_DUP */
if (w->cb_dup)
mg->mg_flags |= MGf_DUP;
#endif /* MGf_DUP */
#if MGf_LOCAL
if (w->cb_local)
mg->mg_flags |= MGf_LOCAL;
#endif /* MGf_LOCAL */
if (SvTYPE(sv) < SVt_PVHV)
goto done;
/* The GMAGICAL flag only says that a hash is tied or has uvar magic - get
* magic is actually never called for them. If the GMAGICAL flag was off before
* calling sv_magicext(), the hash isn't tied and has no uvar magic. If it's
* now on, then this wizard has get magic. Hence we can work around the
* get/clear shortcoming by turning the GMAGICAL flag off. If the current magic
* has uvar callbacks, it will be turned back on later. */
if (!oldgmg && SvGMAGICAL(sv))
SvGMAGICAL_off(sv);
#if VMG_UVAR
if (w->uvar) {
MAGIC *prevmagic;
struct ufuncs uf[2];
uf[0].uf_val = vmg_svt_val;
uf[0].uf_set = NULL;
uf[0].uf_index = 0;
uf[1].uf_val = NULL;
uf[1].uf_set = NULL;
uf[1].uf_index = 0;
/* One uvar magic in the chain is enough. */
for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
moremagic = mg->mg_moremagic;
if (mg->mg_type == PERL_MAGIC_uvar)
break;
}
if (mg) { /* Found another uvar magic. */
struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
if (olduf->uf_val == vmg_svt_val) {
/* It's our uvar magic, nothing to do. oldgmg was true. */
goto done;
} else {
/* It's another uvar magic, backup it and replace it by ours. */
uf[1] = *olduf;
vmg_uvar_del(sv, prevmagic, mg, moremagic);
}
}
vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
/* Our hash now carries uvar magic. The uvar/clear shortcoming has to be
* handled by our uvar callback. */
}
#endif /* VMG_UVAR */
done:
return 1;
}
STATIC UV vmg_dispell(pTHX_ SV *sv, const SV *wiz) {
#define vmg_dispell(S, W) vmg_dispell(aTHX_ (S), (W))
#if VMG_UVAR
U32 uvars = 0;
#endif /* VMG_UVAR */
MAGIC *mg, *prevmagic, *moremagic = NULL;
IV wid = vmg_wizard_id(wiz);
if (SvTYPE(sv) < SVt_PVMG)
return 0;
for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
moremagic = mg->mg_moremagic;
if (mg->mg_type == PERL_MAGIC_ext && mg->mg_private == SIG_WIZ) {
const MGWIZ *z = vmg_wizard_mgwiz(mg->mg_ptr);
IV zid = vmg_wizard_id(mg->mg_ptr);
if (zid == wid) {
#if VMG_UVAR
/* If the current has no uvar, short-circuit uvar deletion. */
uvars = z->uvar ? (uvars + 1) : 0;
#endif /* VMG_UVAR */
break;
#if VMG_UVAR
} else if (z->uvar) {
++uvars;
/* We can't break here since we need to find the ext magic to delete. */
#endif /* VMG_UVAR */
}
}
}
if (!mg)
return 0;
if (prevmagic) {
prevmagic->mg_moremagic = moremagic;
} else {
SvMAGIC_set(sv, moremagic);
}
mg->mg_moremagic = NULL;
/* Destroy private data */
if (mg->mg_obj != sv)
SvREFCNT_dec(mg->mg_obj);
/* Unreference the wizard */
SvREFCNT_dec((SV *) mg->mg_ptr);
Safefree(mg);
#if VMG_UVAR
if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
/* mg was the first ext magic in the chain that had uvar */
for (mg = moremagic; mg; mg = mg->mg_moremagic) {
if (mg->mg_type == PERL_MAGIC_ext && mg->mg_private == SIG_WIZ) {
const MGWIZ *z = vmg_wizard_mgwiz(mg->mg_ptr);
if (z->uvar) {
++uvars;
break;
}
}
}
if (uvars == 1) {
struct ufuncs *uf;
for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
moremagic = mg->mg_moremagic;
if (mg->mg_type == PERL_MAGIC_uvar)
break;
}
/* assert(mg); */
uf = (struct ufuncs *) mg->mg_ptr;
/* assert(uf->uf_val == vmg_svt_val); */
if (uf[1].uf_val || uf[1].uf_set) {
/* Revert the original uvar magic. */
uf[0] = uf[1];
Renew(uf, 1, struct ufuncs);
mg->mg_ptr = (char *) uf;
mg->mg_len = sizeof(struct ufuncs);
} else {
/* Remove the uvar magic. */
vmg_uvar_del(sv, prevmagic, mg, moremagic);
}
}
}
#endif /* VMG_UVAR */
return 1;
}
/* ... OP info ............................................................. */
#define VMG_OP_INFO_NAME 1
#define VMG_OP_INFO_OBJECT 2
#if VMG_THREADSAFE
STATIC perl_mutex vmg_op_name_init_mutex;
#endif
STATIC U32 vmg_op_name_init = 0;
STATIC unsigned char vmg_op_name_len[MAXO] = { 0 };
STATIC void vmg_op_info_init(pTHX_ unsigned int opinfo) {
#define vmg_op_info_init(W) vmg_op_info_init(aTHX_ (W))
switch (opinfo) {
case VMG_OP_INFO_NAME:
#if VMG_THREADSAFE
MUTEX_LOCK(&vmg_op_name_init_mutex);
#endif
if (!vmg_op_name_init) {
OPCODE t;
for (t = 0; t < OP_max; ++t)
vmg_op_name_len[t] = strlen(PL_op_name[t]);
vmg_op_name_init = 1;
}
#if VMG_THREADSAFE
MUTEX_UNLOCK(&vmg_op_name_init_mutex);
#endif
break;
case VMG_OP_INFO_OBJECT: {
dMY_CXT;
if (!MY_CXT.b__op_stashes[0]) {
opclass c;
require_pv("B.pm");
for (c = OPc_NULL; c < OPc_MAX; ++c)
MY_CXT.b__op_stashes[c] = gv_stashpv(vmg_opclassnames[c], 1);
}
break;
}
default:
break;
}
}
STATIC SV *vmg_op_info(pTHX_ unsigned int opinfo) {
#define vmg_op_info(W) vmg_op_info(aTHX_ (W))
if (!PL_op)
return &PL_sv_undef;
switch (opinfo) {
case VMG_OP_INFO_NAME: {
OPCODE t = PL_op->op_type;
return sv_2mortal(newSVpvn(PL_op_name[t], vmg_op_name_len[t]));
}
case VMG_OP_INFO_OBJECT: {
dMY_CXT;
return sv_bless(sv_2mortal(newRV_noinc(newSViv(PTR2IV(PL_op)))),
MY_CXT.b__op_stashes[vmg_opclass(PL_op)]);
}
default:
break;
}
return &PL_sv_undef;
}
/* ... svt callbacks ....................................................... */
#define VMG_CB_CALL_ARGS_MASK 15
#define VMG_CB_CALL_ARGS_SHIFT 4
#define VMG_CB_CALL_OPINFO (VMG_OP_INFO_NAME|VMG_OP_INFO_OBJECT)
STATIC int vmg_cb_call(pTHX_ SV *cb, unsigned int flags, SV *sv, ...) {
va_list ap;
int ret = 0;
unsigned int i, args, opinfo;
SV *svr;
dSP;
args = flags & VMG_CB_CALL_ARGS_MASK;
flags >>= VMG_CB_CALL_ARGS_SHIFT;
opinfo = flags & VMG_CB_CALL_OPINFO;
ENTER;
SAVETMPS;
PUSHMARK(SP);
EXTEND(SP, args + 1);
PUSHs(sv_2mortal(newRV_inc(sv)));
va_start(ap, sv);
for (i = 0; i < args; ++i) {
SV *sva = va_arg(ap, SV *);
PUSHs(sva ? sva : &PL_sv_undef);
}
va_end(ap);
if (opinfo)
XPUSHs(vmg_op_info(opinfo));
PUTBACK;
vmg_call_sv(cb, G_SCALAR, 0);
SPAGAIN;
svr = POPs;
if (SvOK(svr))
ret = (int) SvIV(svr);
PUTBACK;
FREETMPS;
LEAVE;
return ret;
}
#define VMG_CB_FLAGS(OI, A) \
((((unsigned int) (OI)) << VMG_CB_CALL_ARGS_SHIFT) | (A))
#define vmg_cb_call1(I, OI, S, A1) \
vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 1), (S), (A1))
#define vmg_cb_call2(I, OI, S, A1, A2) \
vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 2), (S), (A1), (A2))
#define vmg_cb_call3(I, OI, S, A1, A2, A3) \
vmg_cb_call(aTHX_ (I), VMG_CB_FLAGS((OI), 3), (S), (A1), (A2), (A3))
STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr);
return vmg_cb_call1(w->cb_get, w->opinfo, sv, mg->mg_obj);
}
STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr);
return vmg_cb_call1(w->cb_set, w->opinfo, sv, mg->mg_obj);
}
STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr);
unsigned int opinfo = w->opinfo;
U32 len, ret;
SV *svr;
svtype t = SvTYPE(sv);
dSP;
ENTER;
SAVETMPS;
PUSHMARK(SP);
EXTEND(SP, 3);
PUSHs(sv_2mortal(newRV_inc(sv)));
PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
if (t < SVt_PVAV) {
STRLEN l;
#if VMG_HAS_PERL(5, 9, 3)
const U8 *s = SvPV_const(sv, l);
#else
U8 *s = SvPV(sv, l);
#endif
if (DO_UTF8(sv))
len = utf8_length(s, s + l);
else
len = l;
mPUSHu(len);
} else if (t == SVt_PVAV) {
len = av_len((AV *) sv) + 1;
mPUSHu(len);
} else {
len = 0;
PUSHs(&PL_sv_undef);
}
if (opinfo)
XPUSHs(vmg_op_info(opinfo));
PUTBACK;
vmg_call_sv(w->cb_len, G_SCALAR, 0);
SPAGAIN;
svr = POPs;
ret = SvOK(svr) ? (U32) SvUV(svr) : len;
if (t == SVt_PVAV)
--ret;
PUTBACK;
FREETMPS;
LEAVE;
return ret;
}
STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr);
return vmg_cb_call1(w->cb_clear, w->opinfo, sv, mg->mg_obj);
}
STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
const MGWIZ *w;
int ret = 0;
SV *svr;
dSP;
/* Don't even bother if we are in global destruction - the wizard is prisoner
* of circular references and we are way beyond user realm */
if (PL_dirty)
return 0;
w = vmg_wizard_mgwiz(mg->mg_ptr);
/* So that it survives the temp cleanup below */
SvREFCNT_inc_simple_void(sv);
#if !(VMG_HAS_PERL_MAINT(5, 11, 0, 32686) || VMG_HAS_PERL(5, 12, 0))
/* The previous magic tokens were freed but the magic chain wasn't updated, so
* if you access the sv from the callback the old deleted magics will trigger
* and cause memory misreads. Change 32686 solved it that way : */
SvMAGIC_set(sv, mg);
#endif
ENTER;
SAVETMPS;
PUSHMARK(SP);
EXTEND(SP, 2);
PUSHs(sv_2mortal(newRV_inc(sv)));
PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
if (w->opinfo)
XPUSHs(vmg_op_info(w->opinfo));
PUTBACK;
vmg_call_sv(w->cb_free, G_SCALAR, 1);
SPAGAIN;
svr = POPs;
if (SvOK(svr))
ret = (int) SvIV(svr);
PUTBACK;
FREETMPS;
LEAVE;
/* Calling SvREFCNT_dec() will trigger destructors in an infinite loop, so
* we have to rely on SvREFCNT() being a lvalue. Heck, even the core does it */
--SvREFCNT(sv);
/* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
* mg->mg_ptr reference count */
return ret;
}
#if MGf_COPY
STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
# if VMG_HAS_PERL_MAINT(5, 11, 0, 33256) || VMG_HAS_PERL(5, 12, 0)
I32 keylen
# else
int keylen
# endif
) {
SV *keysv;
const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr);
int ret;
if (keylen == HEf_SVKEY) {
keysv = (SV *) key;
} else {
keysv = newSVpvn(key, keylen);
}
ret = vmg_cb_call3(w->cb_copy, w->opinfo, sv, mg->mg_obj, keysv, nsv);
if (keylen != HEf_SVKEY) {
SvREFCNT_dec(keysv);
}
return ret;
}
#endif /* MGf_COPY */
#if 0 /* MGf_DUP */
STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
return 0;
}
#endif /* MGf_DUP */
#if MGf_LOCAL
STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
const MGWIZ *w = vmg_wizard_mgwiz(mg->mg_ptr);
return vmg_cb_call1(w->cb_local, w->opinfo, nsv, mg->mg_obj);
}
#endif /* MGf_LOCAL */
#if VMG_UVAR
STATIC OP *vmg_pp_resetuvar(pTHX) {
SvRMAGICAL_on(cSVOP_sv);
return NORMAL;
}
STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
struct ufuncs *uf;
MAGIC *mg, *umg;
SV *key = NULL, *newkey = NULL;
int tied = 0;
umg = mg_find(sv, PERL_MAGIC_uvar);
/* umg can't be NULL or we wouldn't be there. */
key = umg->mg_obj;
uf = (struct ufuncs *) umg->mg_ptr;
if (uf[1].uf_val)
uf[1].uf_val(aTHX_ action, sv);
if (uf[1].uf_set)
uf[1].uf_set(aTHX_ action, sv);
action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
const MGWIZ *w;
switch (mg->mg_type) {
case PERL_MAGIC_ext:
break;
case PERL_MAGIC_tied:
++tied;
continue;
default:
continue;
}
if (mg->mg_private != SIG_WIZ) continue;
w = vmg_wizard_mgwiz(mg->mg_ptr);
switch (w->uvar) {
case 0:
continue;
case 2:
if (!newkey)
newkey = key = umg->mg_obj = sv_mortalcopy(umg->mg_obj);
}
switch (action) {
case 0:
if (w->cb_fetch)
vmg_cb_call2(w->cb_fetch, w->opinfo, sv, mg->mg_obj, key);
break;
case HV_FETCH_ISSTORE:
case HV_FETCH_LVALUE:
case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
if (w->cb_store)
vmg_cb_call2(w->cb_store, w->opinfo, sv, mg->mg_obj, key);
break;
case HV_FETCH_ISEXISTS:
if (w->cb_exists)
vmg_cb_call2(w->cb_exists, w->opinfo, sv, mg->mg_obj, key);
break;
case HV_DELETE:
if (w->cb_delete)
vmg_cb_call2(w->cb_delete, w->opinfo, sv, mg->mg_obj, key);
break;
}
}
if (SvRMAGICAL(sv) && !tied) {
/* Temporarily hide the RMAGICAL flag of the hash so it isn't wrongly
* mistaken for a tied hash by the rest of hv_common. It will be reset by
* the op_ppaddr of a new fake op injected between the current and the next
* one. */
OP *o = PL_op;
if (!o->op_next || o->op_next->op_ppaddr != vmg_pp_resetuvar) {
SVOP *svop;
NewOp(1101, svop, 1, SVOP);
svop->op_type = OP_STUB;
svop->op_ppaddr = vmg_pp_resetuvar;
svop->op_next = o->op_next;
svop->op_flags = 0;
svop->op_sv = sv;
o->op_next = (OP *) svop;
}
SvRMAGICAL_off(sv);
}
return 0;
}
#endif /* VMG_UVAR */
/* --- Macros for the XS section ------------------------------------------- */
#define VMG_SET_CB(S, N) \
cb = (S); \
w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? SvREFCNT_inc(SvRV(cb)) : NULL;
#define VMG_SET_SVT_CB(S, N) \
cb = (S); \
if (SvOK(cb) && SvROK(cb)) { \
t->svt_ ## N = vmg_svt_ ## N; \
w->cb_ ## N = SvREFCNT_inc(SvRV(cb)); \
} else { \
t->svt_ ## N = NULL; \
w->cb_ ## N = NULL; \
}
#if VMG_THREADSAFE
STATIC void vmg_cleanup(pTHX_ void *ud) {
dMY_CXT;
ptable_free(MY_CXT.wizards);
MY_CXT.wizards = NULL;
}
#endif /* VMG_THREADSAFE */
/* --- XS ------------------------------------------------------------------ */
MODULE = Variable::Magic PACKAGE = Variable::Magic
PROTOTYPES: ENABLE
BOOT:
{
HV *stash;
MY_CXT_INIT;
#if VMG_THREADSAFE
MY_CXT.wizards = ptable_new();
MY_CXT.owner = aTHX;
#endif
MY_CXT.b__op_stashes[0] = NULL;
#if VMG_THREADSAFE
MUTEX_INIT(&vmg_op_name_init_mutex);
call_atexit(vmg_cleanup, NULL);
#endif
stash = gv_stashpv(__PACKAGE__, 1);
newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID",
newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID));
newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID",
newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID));
newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
newCONSTSUB(stash, "VMG_COMPAT_GLOB_GET", newSVuv(VMG_COMPAT_GLOB_GET));
newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
newCONSTSUB(stash, "VMG_FORKSAFE", newSVuv(VMG_FORKSAFE));
newCONSTSUB(stash, "VMG_OP_INFO_NAME", newSVuv(VMG_OP_INFO_NAME));
newCONSTSUB(stash, "VMG_OP_INFO_OBJECT", newSVuv(VMG_OP_INFO_OBJECT));
}
#if VMG_THREADSAFE
void
CLONE(...)
PROTOTYPE: DISABLE
PREINIT:
ptable *t;
U32 had_b__op_stash = 0;
opclass c;
PPCODE:
{
my_cxt_t ud;
dMY_CXT;
ud.wizards = t = ptable_new();
ud.owner = MY_CXT.owner;
ptable_walk(MY_CXT.wizards, vmg_ptable_clone, &ud);
for (c = OPc_NULL; c < OPc_MAX; ++c) {
if (MY_CXT.b__op_stashes[c])
had_b__op_stash |= (((U32) 1) << c);
}
}
{
MY_CXT_CLONE;
MY_CXT.wizards = t;
MY_CXT.owner = aTHX;
for (c = OPc_NULL; c < OPc_MAX; ++c) {
MY_CXT.b__op_stashes[c] = (had_b__op_stash & (((U32) 1) << c))
? gv_stashpv(vmg_opclassnames[c], 1) : NULL;
}
}
XSRETURN(0);
#endif /* VMG_THREADSAFE */
SV *_wizard(...)
PROTOTYPE: DISABLE
PREINIT:
I32 i = 0;
UV opinfo;
MGWIZ *w;
MGVTBL *t;
SV *cb;
CODE:
dMY_CXT;
if (items != 7
#if MGf_COPY
+ 1
#endif /* MGf_COPY */
#if MGf_DUP
+ 1
#endif /* MGf_DUP */
#if MGf_LOCAL
+ 1
#endif /* MGf_LOCAL */
#if VMG_UVAR
+ 5
#endif /* VMG_UVAR */
) { croak(vmg_wrongargnum); }
Newx(t, 1, MGVTBL);
Newx(w, 1, MGWIZ);
VMG_SET_CB(ST(i++), data);
cb = ST(i++);
opinfo = SvOK(cb) ? SvUV(cb) : 0;
w->opinfo = (U8) ((opinfo < 255) ? opinfo : 255);
if (w->opinfo)
vmg_op_info_init(w->opinfo);
VMG_SET_SVT_CB(ST(i++), get);
VMG_SET_SVT_CB(ST(i++), set);
VMG_SET_SVT_CB(ST(i++), len);
VMG_SET_SVT_CB(ST(i++), clear);
VMG_SET_SVT_CB(ST(i++), free);
#if MGf_COPY
VMG_SET_SVT_CB(ST(i++), copy);
#endif /* MGf_COPY */
#if MGf_DUP
/* VMG_SET_SVT_CB(ST(i++), dup); */
i++;
t->svt_dup = NULL;
w->cb_dup = NULL;
#endif /* MGf_DUP */
#if MGf_LOCAL
VMG_SET_SVT_CB(ST(i++), local);
#endif /* MGf_LOCAL */
#if VMG_UVAR
VMG_SET_CB(ST(i++), fetch);
VMG_SET_CB(ST(i++), store);
VMG_SET_CB(ST(i++), exists);
VMG_SET_CB(ST(i++), delete);
cb = ST(i++);
if (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete)
w->uvar = SvTRUE(cb) ? 2 : 1;
else
w->uvar = 0;
#endif /* VMG_UVAR */
#if VMG_MULTIPLICITY
w->owner = aTHX;
#endif /* VMG_MULTIPLICITY */
w->vtbl = t;
#if VMG_THREADSAFE
ptable_store(MY_CXT.wizards, w, w);
#endif /* VMG_THREADSAFE */
RETVAL = newRV_noinc(vmg_wizard_new(w));
OUTPUT:
RETVAL
SV *cast(SV *sv, SV *wiz, ...)
PROTOTYPE: \[$@%&*]$@
PREINIT:
SV **args = NULL;
I32 i = 0;
CODE:
if (items > 2) {
i = items - 2;
args = &ST(2);
}
RETVAL = newSVuv(vmg_cast(SvRV(sv), vmg_wizard_validate(wiz), args, i));
OUTPUT:
RETVAL
void
getdata(SV *sv, SV *wiz)
PROTOTYPE: \[$@%&*]$
PREINIT:
SV *data;
PPCODE:
data = vmg_data_get(SvRV(sv), vmg_wizard_validate(wiz));
if (!data)
XSRETURN_EMPTY;
ST(0) = data;
XSRETURN(1);
SV *dispell(SV *sv, SV *wiz)
PROTOTYPE: \[$@%&*]$
CODE:
RETVAL = newSVuv(vmg_dispell(SvRV(sv), vmg_wizard_validate(wiz)));
OUTPUT:
RETVAL