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 '~'
56 #undef MGf_DUP /* Disable it for now. */
65 #if PERL_API_VERSION_GE(5, 10, 0)
71 #if (VMG_PERL_PATCHLEVEL >= 25854) || PERL_VERSION_GE(5, 9, 3)
72 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
74 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
77 /* since 5.9.5 - see #43357 */
78 #if (VMG_PERL_PATCHLEVEL >= 31473) || PERL_VERSION_GE(5, 9, 5)
79 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
81 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
86 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html */
87 STATIC void vmg_mg_magical(pTHX_ SV *sv) {
88 #define vmg_mg_magical(S) vmg_mg_magical(aTHX_ (S))
91 if ((mg = SvMAGIC(sv))) {
94 const MGVTBL* const vtbl = mg->mg_virtual;
96 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
103 } while ((mg = mg->mg_moremagic));
104 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
109 #endif /* VMG_UVAR */
111 /* --- Context-safe global data -------------------------------------------- */
113 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
122 /* --- Signatures ---------------------------------------------------------- */
124 #define SIG_MIN ((U16) (1u << 8))
125 #define SIG_MAX ((U16) ((1u << 16) - 1))
126 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
127 #define SIG_WIZ ((U16) ((1u << 8) - 1))
129 /* ... Generate signatures ................................................. */
131 STATIC U16 vmg_gensig(pTHX) {
132 #define vmg_gensig() vmg_gensig(aTHX)
138 sig = SIG_NBR * Drand01() + SIG_MIN;
139 } while (hv_exists(MY_CXT.wizz, buf, sprintf(buf, "%u", sig)));
144 /* --- MGWIZ structure ----------------------------------------------------- */
151 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
154 #endif /* MGf_COPY */
160 #endif /* MGf_LOCAL */
162 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
163 #endif /* VMG_UVAR */
166 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
167 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
169 /* ... Construct private data .............................................. */
171 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
172 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
182 XPUSHs(sv_2mortal(newRV_inc(sv)));
184 I32 i, alen = av_len(args);
185 for (i = 0; i < alen; ++i) { XPUSHs(*av_fetch(args, i, 0)); }
189 count = call_sv(ctor, G_SCALAR);
193 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
195 #if PERL_VERSION_LE(5, 8, 2)
196 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
198 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
209 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
210 MAGIC *mg, *moremagic;
212 if (SvTYPE(sv) >= SVt_PVMG) {
213 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
214 moremagic = mg->mg_moremagic;
215 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
217 if (mg) { return mg->mg_obj; }
223 /* ... 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);
238 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
239 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
240 MAGIC *mg = NULL, *moremagic = NULL;
246 if (SvTYPE(sv) >= SVt_PVMG) {
247 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
248 moremagic = mg->mg_moremagic;
249 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
251 if (mg) { return 1; }
254 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
255 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
256 mg->mg_private = w->sig;
257 mg->mg_flags = mg->mg_flags
260 #endif /* MGf_COPY */
266 #endif /* MGf_LOCAL */
270 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
275 uf[0].uf_val = vmg_svt_val;
282 /* One uvar magic in the chain is enough. */
283 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
284 moremagic = mg->mg_moremagic;
285 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
288 if (mg) { /* Found another uvar magic. */
289 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
290 if (olduf->uf_val == vmg_svt_val) {
291 /* It's our uvar magic, nothing to do. */
294 /* It's another uvar magic, backup it and replace it by ours. */
296 vmg_uvar_del(sv, prevmagic, mg, moremagic);
301 sv_magic(sv, NULL, PERL_MAGIC_uvar, (const char *) &uf, sizeof(uf));
306 #endif /* VMG_UVAR */
311 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
312 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
315 #endif /* VMG_UVAR */
316 MAGIC *mg, *prevmagic, *moremagic = NULL;
318 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
320 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
321 moremagic = mg->mg_moremagic;
322 if (mg->mg_type == PERL_MAGIC_ext) {
323 if (mg->mg_private == sig) {
325 /* If the current has no uvar, short-circuit uvar deletion. */
326 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
327 #endif /* VMG_UVAR */
330 } else if ((mg->mg_private >= SIG_MIN) &&
331 (mg->mg_private <= SIG_MAX) &&
332 SV2MGWIZ(mg->mg_ptr)->uvar) {
334 /* We can't break here since we need to find the ext magic to delete. */
335 #endif /* VMG_UVAR */
339 if (!mg) { return 0; }
342 prevmagic->mg_moremagic = moremagic;
344 SvMAGIC_set(sv, moremagic);
346 mg->mg_moremagic = NULL;
348 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
349 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
353 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
354 /* mg was the first ext magic in the chain that had uvar */
356 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
357 if ((mg->mg_type == PERL_MAGIC_ext) &&
358 (mg->mg_private >= SIG_MIN) &&
359 (mg->mg_private <= SIG_MAX) &&
360 SV2MGWIZ(mg->mg_ptr)->uvar) {
368 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
369 moremagic = mg->mg_moremagic;
370 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
373 uf = (struct ufuncs *) mg->mg_ptr;
374 /* assert(uf->uf_val == vmg_svt_val); */
375 if (uf[1].uf_val || uf[1].uf_set) {
376 /* Revert the original uvar magic. */
378 Renew(uf, 1, struct ufuncs);
379 mg->mg_len = sizeof(struct ufuncs);
381 /* Remove the uvar magic. */
382 vmg_uvar_del(sv, prevmagic, mg, moremagic);
386 #endif /* VMG_UVAR */
391 /* ... svt callbacks ....................................................... */
393 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data) {
394 #define vmg_cb_call(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D))
405 XPUSHs(sv_2mortal(newRV_inc(sv)));
406 if (data) { XPUSHs(data); }
409 count = call_sv(cb, G_SCALAR);
413 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
415 ret = SvOK(svr) ? SvIV(svr) : 0;
426 STATIC int vmg_cb_call2(pTHX_ SV *cb, SV *sv, SV *data, SV *sv2) {
427 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call2(aTHX_ (I), (S), (D), (S2))
438 XPUSHs(sv_2mortal(newRV_inc(sv)));
439 XPUSHs(data ? data : &PL_sv_undef);
440 if (sv2) { XPUSHs(sv2); }
443 count = call_sv(cb, G_SCALAR);
447 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
449 ret = SvOK(svr) ? SvIV(svr) : 0;
458 #endif /* VMG_UVAR */
461 STATIC int vmg_cb_call3(pTHX_ SV *cb, SV *sv, SV *data, SV *sv2, SV *sv3) {
462 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call3(aTHX_ (I), (S), (D), (S2), (S3))
473 XPUSHs(sv_2mortal(newRV_inc(sv)));
474 XPUSHs(data ? data : &PL_sv_undef);
475 XPUSHs(sv2 ? sv2 : &PL_sv_undef);
476 if (sv3) { XPUSHs(sv3); }
479 count = call_sv(cb, G_SCALAR);
483 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
485 ret = SvOK(svr) ? SvIV(svr) : 0;
494 #endif /* MGf_COPY */
496 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
497 return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
500 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
501 return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
504 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
516 XPUSHs(sv_2mortal(newRV_inc(sv)));
517 XPUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
518 if (SvTYPE(sv) == SVt_PVAV) {
519 len = av_len((AV *) sv) + 1;
520 XPUSHs(sv_2mortal(newSViv(len)));
524 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
528 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
530 ret = SvOK(svr) ? SvUV(svr)
531 : ((SvTYPE(sv) == SVt_PVAV) ? len : 1);
541 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
542 return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
545 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
546 /* So that it can survive tmp cleanup in vmg_cb_call */
548 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
549 * mg->mg_ptr reference count */
550 return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
554 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key, int keylen) {
558 if (keylen == HEf_SVKEY) {
561 keysv = newSVpvn(key, keylen);
564 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
566 if (keylen != HEf_SVKEY) {
572 #endif /* MGf_COPY */
575 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
581 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
582 return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
584 #endif /* MGf_LOCAL */
587 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
592 mg = mg_find(sv, PERL_MAGIC_uvar);
593 /* mg can't be NULL or we wouldn't be there. */
595 uf = (struct ufuncs *) mg->mg_ptr;
597 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
598 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
600 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
601 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
603 if ((mg->mg_type != PERL_MAGIC_ext)
604 || (mg->mg_private < SIG_MIN)
605 || (mg->mg_private > SIG_MAX)) { continue; }
606 w = SV2MGWIZ(mg->mg_ptr);
607 if (!w->uvar) { continue; }
610 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
612 case HV_FETCH_ISSTORE:
613 case HV_FETCH_LVALUE:
614 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
615 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
617 case HV_FETCH_ISEXISTS:
618 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
621 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
628 #endif /* VMG_UVAR */
630 /* ... Wizard destructor ................................................... */
632 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
639 SvREFCNT_inc(wiz); /* Fake survival - it's gonna be deleted anyway */
640 #if PERL_API_VERSION_GE(5, 9, 5)
641 SvREFCNT_inc(wiz); /* One more push */
643 if (hv_delete(MY_CXT.wizz, buf, sprintf(buf, "%u", w->sig), 0)) {
647 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
648 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
649 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
650 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
651 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
652 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
654 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
655 #endif /* MGf_COPY */
657 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
660 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
661 #endif /* MGf_LOCAL */
663 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
664 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
665 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
666 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
667 #endif /* VMG_UVAR */
674 STATIC MGVTBL vmg_wizard_vtbl = {
679 vmg_wizard_free, /* free */
682 #endif /* MGf_COPY */
688 #endif /* MGf_LOCAL */
691 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
692 STATIC const char vmg_invalid_sv[] = "Invalid variable";
693 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
694 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
695 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
696 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
698 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
699 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
704 } else if (SvNOK(sv)) {
706 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
709 croak(vmg_invalid_sig);
711 if (sig < SIG_MIN) { sig += SIG_MIN; }
712 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
717 #define VMG_SET_CB(S, N) \
719 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
721 #define VMG_SET_SVT_CB(S, N) \
723 if (SvOK(cb) && SvROK(cb)) { \
724 t->svt_ ## N = vmg_svt_ ## N; \
725 w->cb_ ## N = newRV_inc(SvRV(cb)); \
727 t->svt_ ## N = NULL; \
728 w->cb_ ## N = NULL; \
732 /* --- XS ------------------------------------------------------------------ */
734 MODULE = Variable::Magic PACKAGE = Variable::Magic
742 MY_CXT.wizz = newHV();
744 stash = gv_stashpv(__PACKAGE__, 1);
745 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
746 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
747 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
748 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
749 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
750 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
751 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
752 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
753 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
754 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
755 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
776 #endif /* MGf_COPY */
782 #endif /* MGf_LOCAL */
785 #endif /* VMG_UVAR */
786 ) { croak(vmg_wrongargnum); }
791 sig = vmg_sv2sig(svsig);
792 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
793 ST(0) = sv_2mortal(newRV_inc(*old));
797 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
804 VMG_SET_CB(ST(i++), data);
805 VMG_SET_SVT_CB(ST(i++), get);
806 VMG_SET_SVT_CB(ST(i++), set);
807 VMG_SET_SVT_CB(ST(i++), len);
808 VMG_SET_SVT_CB(ST(i++), clear);
809 VMG_SET_SVT_CB(ST(i++), free);
811 VMG_SET_SVT_CB(ST(i++), copy);
812 #endif /* MGf_COPY */
814 VMG_SET_SVT_CB(ST(i++), dup);
817 VMG_SET_SVT_CB(ST(i++), local);
818 #endif /* MGf_LOCAL */
820 VMG_SET_CB(ST(i++), fetch);
821 VMG_SET_CB(ST(i++), store);
822 VMG_SET_CB(ST(i++), exists);
823 VMG_SET_CB(ST(i++), delete);
824 #endif /* VMG_UVAR */
829 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
830 #endif /* VMG_UVAR */
833 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, -1);
834 mg->mg_private = SIG_WIZ;
836 hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
839 RETVAL = newRV_noinc(sv);
847 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
848 RETVAL = newSVuv(vmg_gensig());
855 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
856 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
860 SV *cast(SV *sv, SV *wiz, ...)
861 PROTOTYPE: \[$@%&*]$@
869 } else if (SvOK(wiz)) {
872 U16 sig = vmg_sv2sig(wiz);
873 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
879 croak(vmg_invalid_sig);
884 av_fill(args, items - 2);
885 for (i = 2; i < items; ++i) {
888 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
891 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
897 SV *getdata(SV *sv, SV *wiz)
905 sig = SV2MGWIZ(SvRV(wiz))->sig;
906 } else if (SvOK(wiz)) {
908 sig = vmg_sv2sig(wiz);
909 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
913 croak(vmg_invalid_wiz);
915 data = vmg_data_get(SvRV(sv), sig);
916 if (!data) { XSRETURN_UNDEF; }
920 SV *dispell(SV *sv, SV *wiz)
927 sig = SV2MGWIZ(SvRV(wiz))->sig;
928 } else if (SvOK(wiz)) {
930 sig = vmg_sv2sig(wiz);
931 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
935 croak(vmg_invalid_wiz);
937 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));