1 /* This file is part of the Variable::Magic Perl module.
2 * See http://search.cpan.org/dist/Variable-Magic/ */
4 #include <stdarg.h> /* <va_list>, va_{start,arg,end}, ... */
6 #include <stdio.h> /* sprintf() */
8 #define PERL_NO_GET_CONTEXT
13 #define __PACKAGE__ "Variable::Magic"
15 #define R(S) fprintf(stderr, "R(" #S ") = %d\n", SvREFCNT(S))
17 #define PERL_VERSION_GE(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
19 #define PERL_VERSION_LE(R, V, S) (PERL_REVISION < (R) || (PERL_REVISION == (R) && (PERL_VERSION < (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION <= (S))))))
21 #define PERL_API_VERSION_GE(R, V, S) (PERL_API_REVISION > (R) || (PERL_API_REVISION == (R) && (PERL_API_VERSION > (V) || (PERL_API_VERSION == (V) && (PERL_API_SUBVERSION >= (S))))))
23 #define PERL_API_VERSION_LE(R, V, S) (PERL_API_REVISION < (R) || (PERL_API_REVISION == (R) && (PERL_API_VERSION < (V) || (PERL_API_VERSION == (V) && (PERL_API_SUBVERSION <= (S))))))
25 #ifndef VMG_PERL_PATCHLEVEL
27 # define VMG_PERL_PATCHLEVEL PERL_PATCHNUM
29 # define VMG_PERL_PATCHLEVEL 0
33 /* --- Compatibility ------------------------------------------------------- */
36 # define Newx(v, n, c) New(0, v, n, c)
40 # define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
44 # define mPUSHi(I) PUSHs(sv_2mortal(newSViv(I)))
48 # define MY_CXT vmg_globaldata
50 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
54 #ifndef PERL_MAGIC_ext
55 # define PERL_MAGIC_ext '~'
70 #if PERL_API_VERSION_GE(5, 10, 0)
76 #if (VMG_PERL_PATCHLEVEL >= 25854) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 9, 3))
77 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
79 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
82 /* since 5.9.5 - see #43357 */
83 #if (VMG_PERL_PATCHLEVEL >= 31473) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 9, 5))
84 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
86 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
89 #if (VMG_PERL_PATCHLEVEL >= 32969) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 11, 0))
90 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
92 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
97 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html - but specialized to our needs. */
98 STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
99 #define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
101 sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
102 /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
104 if ((mg = SvMAGIC(sv))) {
107 const MGVTBL* const vtbl = mg->mg_virtual;
109 if (vtbl->svt_clear) {
114 } while ((mg = mg->mg_moremagic));
118 #endif /* VMG_UVAR */
120 /* --- Context-safe global data -------------------------------------------- */
122 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
131 /* --- Signatures ---------------------------------------------------------- */
133 #define SIG_MIN ((U16) (1u << 8))
134 #define SIG_MAX ((U16) ((1u << 16) - 1))
135 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
136 #define SIG_WIZ ((U16) ((1u << 8) - 1))
138 /* ... Generate signatures ................................................. */
140 STATIC U16 vmg_gensig(pTHX) {
141 #define vmg_gensig() vmg_gensig(aTHX)
147 sig = SIG_NBR * Drand01() + SIG_MIN;
148 } while (hv_exists(MY_CXT.wizz, buf, sprintf(buf, "%u", sig)));
153 /* --- MGWIZ structure ----------------------------------------------------- */
160 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
163 #endif /* MGf_COPY */
169 #endif /* MGf_LOCAL */
171 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
172 #endif /* VMG_UVAR */
175 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
176 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
178 /* ... Construct private data .............................................. */
180 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
181 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
191 XPUSHs(sv_2mortal(newRV_inc(sv)));
193 I32 i, alen = av_len(args);
194 for (i = 0; i < alen; ++i) { XPUSHs(*av_fetch(args, i, 0)); }
198 count = call_sv(ctor, G_SCALAR);
202 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
204 #if PERL_VERSION_LE(5, 8, 2)
205 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
207 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
218 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
219 MAGIC *mg, *moremagic;
221 if (SvTYPE(sv) >= SVt_PVMG) {
222 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
223 moremagic = mg->mg_moremagic;
224 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
226 if (mg) { return mg->mg_obj; }
232 /* ... Magic cast/dispell .................................................. */
235 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
237 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
239 prevmagic->mg_moremagic = moremagic;
241 SvMAGIC_set(sv, moremagic);
243 mg->mg_moremagic = NULL;
244 Safefree(mg->mg_ptr);
247 #endif /* VMG_UVAR */
249 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
250 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
251 MAGIC *mg = NULL, *moremagic = NULL;
257 if (SvTYPE(sv) >= SVt_PVMG) {
258 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
259 moremagic = mg->mg_moremagic;
260 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
262 if (mg) { return 1; }
265 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
266 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
267 mg->mg_private = w->sig;
268 mg->mg_flags = mg->mg_flags
271 #endif /* MGf_COPY */
277 #endif /* MGf_LOCAL */
281 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
286 uf[0].uf_val = vmg_svt_val;
293 /* One uvar magic in the chain is enough. */
294 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
295 moremagic = mg->mg_moremagic;
296 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
299 if (mg) { /* Found another uvar magic. */
300 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
301 if (olduf->uf_val == vmg_svt_val) {
302 /* It's our uvar magic, nothing to do. */
305 /* It's another uvar magic, backup it and replace it by ours. */
307 vmg_uvar_del(sv, prevmagic, mg, moremagic);
312 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
316 #endif /* VMG_UVAR */
321 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
322 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
325 #endif /* VMG_UVAR */
326 MAGIC *mg, *prevmagic, *moremagic = NULL;
328 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
330 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
331 moremagic = mg->mg_moremagic;
332 if (mg->mg_type == PERL_MAGIC_ext) {
333 if (mg->mg_private == sig) {
335 /* If the current has no uvar, short-circuit uvar deletion. */
336 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
337 #endif /* VMG_UVAR */
340 } else if ((mg->mg_private >= SIG_MIN) &&
341 (mg->mg_private <= SIG_MAX) &&
342 SV2MGWIZ(mg->mg_ptr)->uvar) {
344 /* We can't break here since we need to find the ext magic to delete. */
345 #endif /* VMG_UVAR */
349 if (!mg) { return 0; }
352 prevmagic->mg_moremagic = moremagic;
354 SvMAGIC_set(sv, moremagic);
356 mg->mg_moremagic = NULL;
358 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
359 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
363 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
364 /* mg was the first ext magic in the chain that had uvar */
366 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
367 if ((mg->mg_type == PERL_MAGIC_ext) &&
368 (mg->mg_private >= SIG_MIN) &&
369 (mg->mg_private <= SIG_MAX) &&
370 SV2MGWIZ(mg->mg_ptr)->uvar) {
378 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
379 moremagic = mg->mg_moremagic;
380 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
383 uf = (struct ufuncs *) mg->mg_ptr;
384 /* assert(uf->uf_val == vmg_svt_val); */
385 if (uf[1].uf_val || uf[1].uf_set) {
386 /* Revert the original uvar magic. */
388 Renew(uf, 1, struct ufuncs);
389 mg->mg_ptr = (char *) uf;
390 mg->mg_len = sizeof(struct ufuncs);
392 /* Remove the uvar magic. */
393 vmg_uvar_del(sv, prevmagic, mg, moremagic);
397 #endif /* VMG_UVAR */
402 /* ... svt callbacks ....................................................... */
404 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
417 EXTEND(SP, args + 2);
418 PUSHs(sv_2mortal(newRV_inc(sv)));
419 PUSHs(data ? data : &PL_sv_undef);
421 for (i = 0; i < args; ++i) {
422 SV *sva = va_arg(ap, SV *);
423 PUSHs(sva ? sva : &PL_sv_undef);
428 count = call_sv(cb, G_SCALAR);
432 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
434 ret = SvOK(svr) ? SvIV(svr) : 0;
444 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
445 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
446 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
448 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
449 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
452 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
453 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
456 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
469 PUSHs(sv_2mortal(newRV_inc(sv)));
470 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
471 if (SvTYPE(sv) == SVt_PVAV) {
472 len = av_len((AV *) sv) + 1;
480 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
484 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
486 ret = SvOK(svr) ? SvUV(svr) : len;
496 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
497 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
500 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
501 /* So that it can survive tmp cleanup in vmg_cb_call */
503 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
504 * mg->mg_ptr reference count */
505 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
509 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
510 # if (VMG_PERL_PATCHLEVEL >= 33256) || (!VMG_PERL_PATCHLEVEL && PERL_API_VERSION_GE(5, 11, 0))
519 if (keylen == HEf_SVKEY) {
522 keysv = newSVpvn(key, keylen);
525 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
527 if (keylen != HEf_SVKEY) {
533 #endif /* MGf_COPY */
536 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
542 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
543 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
545 #endif /* MGf_LOCAL */
548 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
553 mg = mg_find(sv, PERL_MAGIC_uvar);
554 /* mg can't be NULL or we wouldn't be there. */
556 uf = (struct ufuncs *) mg->mg_ptr;
558 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
559 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
561 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
562 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
564 if ((mg->mg_type != PERL_MAGIC_ext)
565 || (mg->mg_private < SIG_MIN)
566 || (mg->mg_private > SIG_MAX)) { continue; }
567 w = SV2MGWIZ(mg->mg_ptr);
568 if (!w->uvar) { continue; }
571 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
573 case HV_FETCH_ISSTORE:
574 case HV_FETCH_LVALUE:
575 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
576 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
578 case HV_FETCH_ISEXISTS:
579 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
582 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
589 #endif /* VMG_UVAR */
591 /* ... Wizard destructor ................................................... */
593 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
600 SvREFCNT_inc(wiz); /* Fake survival - it's gonna be deleted anyway */
601 #if PERL_API_VERSION_GE(5, 9, 5)
602 SvREFCNT_inc(wiz); /* One more push */
604 if (hv_delete(MY_CXT.wizz, buf, sprintf(buf, "%u", w->sig), 0)) {
608 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
609 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
610 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
611 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
612 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
613 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
615 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
616 #endif /* MGf_COPY */
618 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
621 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
622 #endif /* MGf_LOCAL */
624 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
625 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
626 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
627 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
628 #endif /* VMG_UVAR */
635 STATIC MGVTBL vmg_wizard_vtbl = {
640 vmg_wizard_free, /* free */
643 #endif /* MGf_COPY */
649 #endif /* MGf_LOCAL */
652 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
653 STATIC const char vmg_invalid_sv[] = "Invalid variable";
654 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
655 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
656 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
657 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
659 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
660 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
665 } else if (SvNOK(sv)) {
667 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
670 croak(vmg_invalid_sig);
672 if (sig < SIG_MIN) { sig += SIG_MIN; }
673 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
678 #define VMG_SET_CB(S, N) \
680 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
682 #define VMG_SET_SVT_CB(S, N) \
684 if (SvOK(cb) && SvROK(cb)) { \
685 t->svt_ ## N = vmg_svt_ ## N; \
686 w->cb_ ## N = newRV_inc(SvRV(cb)); \
688 t->svt_ ## N = NULL; \
689 w->cb_ ## N = NULL; \
693 /* --- XS ------------------------------------------------------------------ */
695 MODULE = Variable::Magic PACKAGE = Variable::Magic
703 MY_CXT.wizz = newHV();
705 stash = gv_stashpv(__PACKAGE__, 1);
706 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
707 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
708 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
709 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
710 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
711 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
712 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
713 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
714 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
715 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
716 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
717 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
718 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
739 #endif /* MGf_COPY */
745 #endif /* MGf_LOCAL */
748 #endif /* VMG_UVAR */
749 ) { croak(vmg_wrongargnum); }
754 sig = vmg_sv2sig(svsig);
755 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
756 ST(0) = sv_2mortal(newRV_inc(*old));
760 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
767 VMG_SET_CB(ST(i++), data);
768 VMG_SET_SVT_CB(ST(i++), get);
769 VMG_SET_SVT_CB(ST(i++), set);
770 VMG_SET_SVT_CB(ST(i++), len);
771 VMG_SET_SVT_CB(ST(i++), clear);
772 VMG_SET_SVT_CB(ST(i++), free);
774 VMG_SET_SVT_CB(ST(i++), copy);
775 #endif /* MGf_COPY */
777 /* VMG_SET_SVT_CB(ST(i++), dup); */
783 VMG_SET_SVT_CB(ST(i++), local);
784 #endif /* MGf_LOCAL */
786 VMG_SET_CB(ST(i++), fetch);
787 VMG_SET_CB(ST(i++), store);
788 VMG_SET_CB(ST(i++), exists);
789 VMG_SET_CB(ST(i++), delete);
790 #endif /* VMG_UVAR */
795 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
796 #endif /* VMG_UVAR */
799 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, -1);
800 mg->mg_private = SIG_WIZ;
802 hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
805 RETVAL = newRV_noinc(sv);
813 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
814 RETVAL = newSVuv(vmg_gensig());
821 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
822 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
826 SV *cast(SV *sv, SV *wiz, ...)
827 PROTOTYPE: \[$@%&*]$@
835 } else if (SvOK(wiz)) {
838 U16 sig = vmg_sv2sig(wiz);
839 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
845 croak(vmg_invalid_sig);
850 av_fill(args, items - 2);
851 for (i = 2; i < items; ++i) {
854 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
857 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
863 SV *getdata(SV *sv, SV *wiz)
871 sig = SV2MGWIZ(SvRV(wiz))->sig;
872 } else if (SvOK(wiz)) {
874 sig = vmg_sv2sig(wiz);
875 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
879 croak(vmg_invalid_wiz);
881 data = vmg_data_get(SvRV(sv), sig);
882 if (!data) { XSRETURN_UNDEF; }
886 SV *dispell(SV *sv, SV *wiz)
893 sig = SV2MGWIZ(SvRV(wiz))->sig;
894 } else if (SvOK(wiz)) {
896 sig = vmg_sv2sig(wiz);
897 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
901 croak(vmg_invalid_wiz);
903 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));