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 MY_CXT vmg_globaldata
46 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
50 #ifndef PERL_MAGIC_ext
51 # define PERL_MAGIC_ext '~'
66 #if PERL_API_VERSION_GE(5, 10, 0)
72 #if (VMG_PERL_PATCHLEVEL >= 25854) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 9, 3))
73 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
75 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
78 /* since 5.9.5 - see #43357 */
79 #if (VMG_PERL_PATCHLEVEL >= 31473) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 9, 5))
80 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
82 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
85 #if (VMG_PERL_PATCHLEVEL >= 32969) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 11, 0))
86 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
88 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
93 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html, but specialized to our needs. */
94 STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
95 #define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
97 sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
98 /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
100 if ((mg = SvMAGIC(sv))) {
103 const MGVTBL* const vtbl = mg->mg_virtual;
106 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
111 if (vtbl->svt_clear) {
116 } while ((mg = mg->mg_moremagic));
118 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
124 #endif /* VMG_UVAR */
126 /* --- Context-safe global data -------------------------------------------- */
128 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
137 /* --- Signatures ---------------------------------------------------------- */
139 #define SIG_MIN ((U16) (1u << 8))
140 #define SIG_MAX ((U16) ((1u << 16) - 1))
141 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
142 #define SIG_WIZ ((U16) ((1u << 8) - 1))
144 /* ... Generate signatures ................................................. */
146 STATIC U16 vmg_gensig(pTHX) {
147 #define vmg_gensig() vmg_gensig(aTHX)
153 sig = SIG_NBR * Drand01() + SIG_MIN;
154 } while (hv_exists(MY_CXT.wizz, buf, sprintf(buf, "%u", sig)));
159 /* --- MGWIZ structure ----------------------------------------------------- */
166 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
169 #endif /* MGf_COPY */
175 #endif /* MGf_LOCAL */
177 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
178 #endif /* VMG_UVAR */
181 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
182 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
184 /* ... Construct private data .............................................. */
186 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
187 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
197 XPUSHs(sv_2mortal(newRV_inc(sv)));
199 I32 i, alen = av_len(args);
200 for (i = 0; i < alen; ++i) { XPUSHs(*av_fetch(args, i, 0)); }
204 count = call_sv(ctor, G_SCALAR);
208 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
210 #if PERL_VERSION_LE(5, 8, 2)
211 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
213 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
224 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
225 MAGIC *mg, *moremagic;
227 if (SvTYPE(sv) >= SVt_PVMG) {
228 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
229 moremagic = mg->mg_moremagic;
230 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
232 if (mg) { return mg->mg_obj; }
238 /* ... Magic cast/dispell .................................................. */
241 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
243 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
245 prevmagic->mg_moremagic = moremagic;
247 SvMAGIC_set(sv, moremagic);
249 mg->mg_moremagic = NULL;
250 Safefree(mg->mg_ptr);
253 #endif /* VMG_UVAR */
255 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
256 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
257 MAGIC *mg = NULL, *moremagic = NULL;
263 if (SvTYPE(sv) >= SVt_PVMG) {
264 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
265 moremagic = mg->mg_moremagic;
266 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
268 if (mg) { return 1; }
271 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
272 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
273 mg->mg_private = w->sig;
274 mg->mg_flags = mg->mg_flags
277 #endif /* MGf_COPY */
283 #endif /* MGf_LOCAL */
287 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
292 uf[0].uf_val = vmg_svt_val;
299 /* One uvar magic in the chain is enough. */
300 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
301 moremagic = mg->mg_moremagic;
302 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
305 if (mg) { /* Found another uvar magic. */
306 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
307 if (olduf->uf_val == vmg_svt_val) {
308 /* It's our uvar magic, nothing to do. */
311 /* It's another uvar magic, backup it and replace it by ours. */
313 vmg_uvar_del(sv, prevmagic, mg, moremagic);
318 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
322 #endif /* VMG_UVAR */
327 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
328 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
331 #endif /* VMG_UVAR */
332 MAGIC *mg, *prevmagic, *moremagic = NULL;
334 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
336 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
337 moremagic = mg->mg_moremagic;
338 if (mg->mg_type == PERL_MAGIC_ext) {
339 if (mg->mg_private == sig) {
341 /* If the current has no uvar, short-circuit uvar deletion. */
342 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
343 #endif /* VMG_UVAR */
346 } else if ((mg->mg_private >= SIG_MIN) &&
347 (mg->mg_private <= SIG_MAX) &&
348 SV2MGWIZ(mg->mg_ptr)->uvar) {
350 /* We can't break here since we need to find the ext magic to delete. */
351 #endif /* VMG_UVAR */
355 if (!mg) { return 0; }
358 prevmagic->mg_moremagic = moremagic;
360 SvMAGIC_set(sv, moremagic);
362 mg->mg_moremagic = NULL;
364 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
365 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
369 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
370 /* mg was the first ext magic in the chain that had uvar */
372 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
373 if ((mg->mg_type == PERL_MAGIC_ext) &&
374 (mg->mg_private >= SIG_MIN) &&
375 (mg->mg_private <= SIG_MAX) &&
376 SV2MGWIZ(mg->mg_ptr)->uvar) {
384 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
385 moremagic = mg->mg_moremagic;
386 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
389 uf = (struct ufuncs *) mg->mg_ptr;
390 /* assert(uf->uf_val == vmg_svt_val); */
391 if (uf[1].uf_val || uf[1].uf_set) {
392 /* Revert the original uvar magic. */
394 Renew(uf, 1, struct ufuncs);
395 mg->mg_ptr = (char *) uf;
396 mg->mg_len = sizeof(struct ufuncs);
398 /* Remove the uvar magic. */
399 vmg_uvar_del(sv, prevmagic, mg, moremagic);
403 #endif /* VMG_UVAR */
408 /* ... svt callbacks ....................................................... */
410 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
423 EXTEND(SP, args + 2);
424 PUSHs(sv_2mortal(newRV_inc(sv)));
425 PUSHs(data ? data : &PL_sv_undef);
427 for (i = 0; i < args; ++i) {
428 SV *sva = va_arg(ap, SV *);
429 PUSHs(sva ? sva : &PL_sv_undef);
434 count = call_sv(cb, G_SCALAR);
438 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
440 ret = SvOK(svr) ? SvIV(svr) : 0;
450 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
451 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
452 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
454 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
455 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
458 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
459 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
462 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
475 PUSHs(sv_2mortal(newRV_inc(sv)));
476 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
477 if (SvTYPE(sv) == SVt_PVAV) {
478 len = av_len((AV *) sv) + 1;
486 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
490 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
492 ret = SvOK(svr) ? SvUV(svr) : len;
502 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
503 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
506 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
507 /* So that it can survive tmp cleanup in vmg_cb_call */
509 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
510 * mg->mg_ptr reference count */
511 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
515 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
516 # if (VMG_PERL_PATCHLEVEL >= 33256) || (!VMG_PERL_PATCHLEVEL && PERL_API_VERSION_GE(5, 11, 0))
525 if (keylen == HEf_SVKEY) {
528 keysv = newSVpvn(key, keylen);
531 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
533 if (keylen != HEf_SVKEY) {
539 #endif /* MGf_COPY */
542 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
548 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
549 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
551 #endif /* MGf_LOCAL */
554 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
559 mg = mg_find(sv, PERL_MAGIC_uvar);
560 /* mg can't be NULL or we wouldn't be there. */
562 uf = (struct ufuncs *) mg->mg_ptr;
564 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
565 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
567 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
568 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
570 if ((mg->mg_type != PERL_MAGIC_ext)
571 || (mg->mg_private < SIG_MIN)
572 || (mg->mg_private > SIG_MAX)) { continue; }
573 w = SV2MGWIZ(mg->mg_ptr);
574 if (!w->uvar) { continue; }
577 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
579 case HV_FETCH_ISSTORE:
580 case HV_FETCH_LVALUE:
581 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
582 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
584 case HV_FETCH_ISEXISTS:
585 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
588 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
595 #endif /* VMG_UVAR */
597 /* ... Wizard destructor ................................................... */
599 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
606 SvREFCNT_inc(wiz); /* Fake survival - it's gonna be deleted anyway */
607 #if PERL_API_VERSION_GE(5, 9, 5)
608 SvREFCNT_inc(wiz); /* One more push */
610 if (hv_delete(MY_CXT.wizz, buf, sprintf(buf, "%u", w->sig), 0)) {
614 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
615 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
616 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
617 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
618 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
619 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
621 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
622 #endif /* MGf_COPY */
624 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
627 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
628 #endif /* MGf_LOCAL */
630 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
631 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
632 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
633 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
634 #endif /* VMG_UVAR */
641 STATIC MGVTBL vmg_wizard_vtbl = {
646 vmg_wizard_free, /* free */
649 #endif /* MGf_COPY */
655 #endif /* MGf_LOCAL */
658 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
659 STATIC const char vmg_invalid_sv[] = "Invalid variable";
660 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
661 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
662 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
663 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
665 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
666 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
671 } else if (SvNOK(sv)) {
673 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
676 croak(vmg_invalid_sig);
678 if (sig < SIG_MIN) { sig += SIG_MIN; }
679 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
684 #define VMG_SET_CB(S, N) \
686 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
688 #define VMG_SET_SVT_CB(S, N) \
690 if (SvOK(cb) && SvROK(cb)) { \
691 t->svt_ ## N = vmg_svt_ ## N; \
692 w->cb_ ## N = newRV_inc(SvRV(cb)); \
694 t->svt_ ## N = NULL; \
695 w->cb_ ## N = NULL; \
699 /* --- XS ------------------------------------------------------------------ */
701 MODULE = Variable::Magic PACKAGE = Variable::Magic
709 MY_CXT.wizz = newHV();
711 stash = gv_stashpv(__PACKAGE__, 1);
712 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
713 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
714 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
715 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
716 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
717 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
718 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
719 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
720 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
721 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
722 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
723 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
724 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
745 #endif /* MGf_COPY */
751 #endif /* MGf_LOCAL */
754 #endif /* VMG_UVAR */
755 ) { croak(vmg_wrongargnum); }
760 sig = vmg_sv2sig(svsig);
761 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
762 ST(0) = sv_2mortal(newRV_inc(*old));
766 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
773 VMG_SET_CB(ST(i++), data);
774 VMG_SET_SVT_CB(ST(i++), get);
775 VMG_SET_SVT_CB(ST(i++), set);
776 VMG_SET_SVT_CB(ST(i++), len);
777 VMG_SET_SVT_CB(ST(i++), clear);
778 VMG_SET_SVT_CB(ST(i++), free);
780 VMG_SET_SVT_CB(ST(i++), copy);
781 #endif /* MGf_COPY */
783 /* VMG_SET_SVT_CB(ST(i++), dup); */
789 VMG_SET_SVT_CB(ST(i++), local);
790 #endif /* MGf_LOCAL */
792 VMG_SET_CB(ST(i++), fetch);
793 VMG_SET_CB(ST(i++), store);
794 VMG_SET_CB(ST(i++), exists);
795 VMG_SET_CB(ST(i++), delete);
796 #endif /* VMG_UVAR */
801 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
802 #endif /* VMG_UVAR */
805 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, -1);
806 mg->mg_private = SIG_WIZ;
808 hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
811 RETVAL = newRV_noinc(sv);
819 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
820 RETVAL = newSVuv(vmg_gensig());
827 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
828 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
832 SV *cast(SV *sv, SV *wiz, ...)
833 PROTOTYPE: \[$@%&*]$@
841 } else if (SvOK(wiz)) {
844 U16 sig = vmg_sv2sig(wiz);
845 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
851 croak(vmg_invalid_sig);
856 av_fill(args, items - 2);
857 for (i = 2; i < items; ++i) {
860 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
863 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
869 SV *getdata(SV *sv, SV *wiz)
877 sig = SV2MGWIZ(SvRV(wiz))->sig;
878 } else if (SvOK(wiz)) {
880 sig = vmg_sv2sig(wiz);
881 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
885 croak(vmg_invalid_wiz);
887 data = vmg_data_get(SvRV(sv), sig);
888 if (!data) { XSRETURN_UNDEF; }
892 SV *dispell(SV *sv, SV *wiz)
899 sig = SV2MGWIZ(SvRV(wiz))->sig;
900 } else if (SvOK(wiz)) {
902 sig = vmg_sv2sig(wiz);
903 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
907 croak(vmg_invalid_wiz);
909 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));