1 /* This file is part of the Variable::Magic Perl module.
2 * See http://search.cpan.org/dist/Variable-Magic/ */
4 #include <stdio.h> /* sprintf() */
6 #define PERL_NO_GET_CONTEXT
11 #define __PACKAGE__ "Variable::Magic"
13 #define R(S) fprintf(stderr, "R(" #S ") = %d\n", SvREFCNT(S))
15 #define PERL_VERSION_GE(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
17 #define PERL_VERSION_LE(R, V, S) (PERL_REVISION < (R) || (PERL_REVISION == (R) && (PERL_VERSION < (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION <= (S))))))
19 #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))))))
21 #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))))))
23 #ifndef VMG_PERL_PATCHLEVEL
25 # define VMG_PERL_PATCHLEVEL PERL_PATCHNUM
27 # define VMG_PERL_PATCHLEVEL 0
31 /* --- Compatibility ------------------------------------------------------- */
34 # define Newx(v, n, c) New(0, v, n, c)
38 # define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
42 # define MY_CXT vmg_globaldata
44 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
48 #ifndef PERL_MAGIC_ext
49 # define PERL_MAGIC_ext '~'
64 #if PERL_API_VERSION_GE(5, 10, 0)
70 #if (VMG_PERL_PATCHLEVEL >= 25854) || PERL_VERSION_GE(5, 9, 3)
71 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
73 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
76 /* since 5.9.5 - see #43357 */
77 #if (VMG_PERL_PATCHLEVEL >= 31473) || PERL_VERSION_GE(5, 9, 5)
78 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
80 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
85 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html */
86 STATIC void vmg_mg_magical(pTHX_ SV *sv) {
87 #define vmg_mg_magical(S) vmg_mg_magical(aTHX_ (S))
90 if ((mg = SvMAGIC(sv))) {
93 const MGVTBL* const vtbl = mg->mg_virtual;
95 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
102 } while ((mg = mg->mg_moremagic));
103 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
108 #endif /* VMG_UVAR */
110 /* --- Context-safe global data -------------------------------------------- */
112 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
121 /* --- Signatures ---------------------------------------------------------- */
123 #define SIG_MIN ((U16) (1u << 8))
124 #define SIG_MAX ((U16) ((1u << 16) - 1))
125 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
126 #define SIG_WIZ ((U16) ((1u << 8) - 1))
128 /* ... Generate signatures ................................................. */
130 STATIC U16 vmg_gensig(pTHX) {
131 #define vmg_gensig() vmg_gensig(aTHX)
137 sig = SIG_NBR * Drand01() + SIG_MIN;
138 } while (hv_exists(MY_CXT.wizz, buf, sprintf(buf, "%u", sig)));
143 /* --- MGWIZ structure ----------------------------------------------------- */
150 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
153 #endif /* MGf_COPY */
159 #endif /* MGf_LOCAL */
161 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
162 #endif /* VMG_UVAR */
165 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
166 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
168 /* ... Construct private data .............................................. */
170 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
171 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
181 XPUSHs(sv_2mortal(newRV_inc(sv)));
183 I32 i, alen = av_len(args);
184 for (i = 0; i < alen; ++i) { XPUSHs(*av_fetch(args, i, 0)); }
188 count = call_sv(ctor, G_SCALAR);
192 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
194 #if PERL_VERSION_LE(5, 8, 2)
195 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
197 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
208 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
209 MAGIC *mg, *moremagic;
211 if (SvTYPE(sv) >= SVt_PVMG) {
212 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
213 moremagic = mg->mg_moremagic;
214 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
216 if (mg) { return mg->mg_obj; }
222 /* ... Magic cast/dispell .................................................. */
225 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
227 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
229 prevmagic->mg_moremagic = moremagic;
231 SvMAGIC_set(sv, moremagic);
233 mg->mg_moremagic = NULL;
234 Safefree(mg->mg_ptr);
237 #endif /* VMG_UVAR */
239 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
240 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
241 MAGIC *mg = NULL, *moremagic = NULL;
247 if (SvTYPE(sv) >= SVt_PVMG) {
248 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
249 moremagic = mg->mg_moremagic;
250 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
252 if (mg) { return 1; }
255 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
256 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
257 mg->mg_private = w->sig;
258 mg->mg_flags = mg->mg_flags
261 #endif /* MGf_COPY */
267 #endif /* MGf_LOCAL */
271 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
276 uf[0].uf_val = vmg_svt_val;
283 /* One uvar magic in the chain is enough. */
284 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
285 moremagic = mg->mg_moremagic;
286 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
289 if (mg) { /* Found another uvar magic. */
290 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
291 if (olduf->uf_val == vmg_svt_val) {
292 /* It's our uvar magic, nothing to do. */
295 /* It's another uvar magic, backup it and replace it by ours. */
297 vmg_uvar_del(sv, prevmagic, mg, moremagic);
302 sv_magic(sv, NULL, PERL_MAGIC_uvar, (const char *) &uf, sizeof(uf));
307 #endif /* VMG_UVAR */
312 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
313 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
316 #endif /* VMG_UVAR */
317 MAGIC *mg, *prevmagic, *moremagic = NULL;
319 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
321 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
322 moremagic = mg->mg_moremagic;
323 if (mg->mg_type == PERL_MAGIC_ext) {
324 if (mg->mg_private == sig) {
326 /* If the current has no uvar, short-circuit uvar deletion. */
327 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
328 #endif /* VMG_UVAR */
331 } else if ((mg->mg_private >= SIG_MIN) &&
332 (mg->mg_private <= SIG_MAX) &&
333 SV2MGWIZ(mg->mg_ptr)->uvar) {
335 /* We can't break here since we need to find the ext magic to delete. */
336 #endif /* VMG_UVAR */
340 if (!mg) { return 0; }
343 prevmagic->mg_moremagic = moremagic;
345 SvMAGIC_set(sv, moremagic);
347 mg->mg_moremagic = NULL;
349 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
350 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
354 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
355 /* mg was the first ext magic in the chain that had uvar */
357 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
358 if ((mg->mg_type == PERL_MAGIC_ext) &&
359 (mg->mg_private >= SIG_MIN) &&
360 (mg->mg_private <= SIG_MAX) &&
361 SV2MGWIZ(mg->mg_ptr)->uvar) {
369 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
370 moremagic = mg->mg_moremagic;
371 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
374 uf = (struct ufuncs *) mg->mg_ptr;
375 /* assert(uf->uf_val == vmg_svt_val); */
376 if (uf[1].uf_val || uf[1].uf_set) {
377 /* Revert the original uvar magic. */
379 Renew(uf, 1, struct ufuncs);
380 mg->mg_ptr = (char *) uf;
381 mg->mg_len = sizeof(struct ufuncs);
383 /* Remove the uvar magic. */
384 vmg_uvar_del(sv, prevmagic, mg, moremagic);
388 #endif /* VMG_UVAR */
393 /* ... svt callbacks ....................................................... */
395 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data) {
396 #define vmg_cb_call(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D))
407 XPUSHs(sv_2mortal(newRV_inc(sv)));
408 if (data) { XPUSHs(data); }
411 count = call_sv(cb, G_SCALAR);
415 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
417 ret = SvOK(svr) ? SvIV(svr) : 0;
428 STATIC int vmg_cb_call2(pTHX_ SV *cb, SV *sv, SV *data, SV *sv2) {
429 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call2(aTHX_ (I), (S), (D), (S2))
440 XPUSHs(sv_2mortal(newRV_inc(sv)));
441 XPUSHs(data ? data : &PL_sv_undef);
442 if (sv2) { XPUSHs(sv2); }
445 count = call_sv(cb, G_SCALAR);
449 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
451 ret = SvOK(svr) ? SvIV(svr) : 0;
460 #endif /* VMG_UVAR */
463 STATIC int vmg_cb_call3(pTHX_ SV *cb, SV *sv, SV *data, SV *sv2, SV *sv3) {
464 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call3(aTHX_ (I), (S), (D), (S2), (S3))
475 XPUSHs(sv_2mortal(newRV_inc(sv)));
476 XPUSHs(data ? data : &PL_sv_undef);
477 XPUSHs(sv2 ? sv2 : &PL_sv_undef);
478 if (sv3) { XPUSHs(sv3); }
481 count = call_sv(cb, G_SCALAR);
485 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
487 ret = SvOK(svr) ? SvIV(svr) : 0;
496 #endif /* MGf_COPY */
498 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
499 return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
502 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
503 return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
506 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
518 XPUSHs(sv_2mortal(newRV_inc(sv)));
519 XPUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
520 if (SvTYPE(sv) == SVt_PVAV) {
521 len = av_len((AV *) sv) + 1;
522 XPUSHs(sv_2mortal(newSViv(len)));
526 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
530 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
532 ret = SvOK(svr) ? SvUV(svr)
533 : ((SvTYPE(sv) == SVt_PVAV) ? len : 1);
543 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
544 return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
547 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
548 /* So that it can survive tmp cleanup in vmg_cb_call */
550 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
551 * mg->mg_ptr reference count */
552 return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
556 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
557 # if PERL_API_VERSION_GE(5, 11, 0)
566 if (keylen == HEf_SVKEY) {
569 keysv = newSVpvn(key, keylen);
572 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
574 if (keylen != HEf_SVKEY) {
580 #endif /* MGf_COPY */
583 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
589 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
590 return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
592 #endif /* MGf_LOCAL */
595 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
600 mg = mg_find(sv, PERL_MAGIC_uvar);
601 /* mg can't be NULL or we wouldn't be there. */
603 uf = (struct ufuncs *) mg->mg_ptr;
605 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
606 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
608 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
609 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
611 if ((mg->mg_type != PERL_MAGIC_ext)
612 || (mg->mg_private < SIG_MIN)
613 || (mg->mg_private > SIG_MAX)) { continue; }
614 w = SV2MGWIZ(mg->mg_ptr);
615 if (!w->uvar) { continue; }
618 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
620 case HV_FETCH_ISSTORE:
621 case HV_FETCH_LVALUE:
622 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
623 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
625 case HV_FETCH_ISEXISTS:
626 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
629 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
636 #endif /* VMG_UVAR */
638 /* ... Wizard destructor ................................................... */
640 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
647 SvREFCNT_inc(wiz); /* Fake survival - it's gonna be deleted anyway */
648 #if PERL_API_VERSION_GE(5, 9, 5)
649 SvREFCNT_inc(wiz); /* One more push */
651 if (hv_delete(MY_CXT.wizz, buf, sprintf(buf, "%u", w->sig), 0)) {
655 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
656 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
657 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
658 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
659 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
660 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
662 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
663 #endif /* MGf_COPY */
665 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
668 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
669 #endif /* MGf_LOCAL */
671 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
672 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
673 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
674 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
675 #endif /* VMG_UVAR */
682 STATIC MGVTBL vmg_wizard_vtbl = {
687 vmg_wizard_free, /* free */
690 #endif /* MGf_COPY */
696 #endif /* MGf_LOCAL */
699 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
700 STATIC const char vmg_invalid_sv[] = "Invalid variable";
701 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
702 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
703 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
704 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
706 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
707 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
712 } else if (SvNOK(sv)) {
714 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
717 croak(vmg_invalid_sig);
719 if (sig < SIG_MIN) { sig += SIG_MIN; }
720 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
725 #define VMG_SET_CB(S, N) \
727 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
729 #define VMG_SET_SVT_CB(S, N) \
731 if (SvOK(cb) && SvROK(cb)) { \
732 t->svt_ ## N = vmg_svt_ ## N; \
733 w->cb_ ## N = newRV_inc(SvRV(cb)); \
735 t->svt_ ## N = NULL; \
736 w->cb_ ## N = NULL; \
740 /* --- XS ------------------------------------------------------------------ */
742 MODULE = Variable::Magic PACKAGE = Variable::Magic
750 MY_CXT.wizz = newHV();
752 stash = gv_stashpv(__PACKAGE__, 1);
753 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
754 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
755 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
756 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
757 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
758 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
759 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
760 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
761 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
762 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
763 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
784 #endif /* MGf_COPY */
790 #endif /* MGf_LOCAL */
793 #endif /* VMG_UVAR */
794 ) { croak(vmg_wrongargnum); }
799 sig = vmg_sv2sig(svsig);
800 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
801 ST(0) = sv_2mortal(newRV_inc(*old));
805 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
812 VMG_SET_CB(ST(i++), data);
813 VMG_SET_SVT_CB(ST(i++), get);
814 VMG_SET_SVT_CB(ST(i++), set);
815 VMG_SET_SVT_CB(ST(i++), len);
816 VMG_SET_SVT_CB(ST(i++), clear);
817 VMG_SET_SVT_CB(ST(i++), free);
819 VMG_SET_SVT_CB(ST(i++), copy);
820 #endif /* MGf_COPY */
822 /* VMG_SET_SVT_CB(ST(i++), dup); */
828 VMG_SET_SVT_CB(ST(i++), local);
829 #endif /* MGf_LOCAL */
831 VMG_SET_CB(ST(i++), fetch);
832 VMG_SET_CB(ST(i++), store);
833 VMG_SET_CB(ST(i++), exists);
834 VMG_SET_CB(ST(i++), delete);
835 #endif /* VMG_UVAR */
840 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
841 #endif /* VMG_UVAR */
844 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, -1);
845 mg->mg_private = SIG_WIZ;
847 hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
850 RETVAL = newRV_noinc(sv);
858 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
859 RETVAL = newSVuv(vmg_gensig());
866 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
867 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
871 SV *cast(SV *sv, SV *wiz, ...)
872 PROTOTYPE: \[$@%&*]$@
880 } else if (SvOK(wiz)) {
883 U16 sig = vmg_sv2sig(wiz);
884 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
890 croak(vmg_invalid_sig);
895 av_fill(args, items - 2);
896 for (i = 2; i < items; ++i) {
899 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
902 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
908 SV *getdata(SV *sv, SV *wiz)
916 sig = SV2MGWIZ(SvRV(wiz))->sig;
917 } else if (SvOK(wiz)) {
919 sig = vmg_sv2sig(wiz);
920 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
924 croak(vmg_invalid_wiz);
926 data = vmg_data_get(SvRV(sv), sig);
927 if (!data) { XSRETURN_UNDEF; }
931 SV *dispell(SV *sv, SV *wiz)
938 sig = SV2MGWIZ(SvRV(wiz))->sig;
939 } else if (SvOK(wiz)) {
941 sig = vmg_sv2sig(wiz);
942 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
946 croak(vmg_invalid_wiz);
948 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));