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 #ifndef VMG_PERL_PATCHLEVEL
23 # define VMG_PERL_PATCHLEVEL PERL_PATCHNUM
25 # define VMG_PERL_PATCHLEVEL 0
29 #define VMG_HAS_PERL_OR(P, R, V, S) ((VMG_PERL_PATCHLEVEL >= (P)) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE((R), (V), (S))))
31 #define VMG_HAS_PERL_AND(P, R, V, S) (PERL_VERSION_GE((R), (V), (S)) && (!VMG_PERL_PATCHLEVEL || (VMG_PERL_PATCHLEVEL >= (P))))
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)))
50 # define MY_CXT vmg_globaldata
52 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
58 # define VMG_THREADSAFE 0
60 # define VMG_THREADSAFE 1
63 #ifndef PERL_MAGIC_ext
64 # define PERL_MAGIC_ext '~'
79 /* uvar magic and Hash::Util::FieldHash were commited with p28419 */
80 #if VMG_HAS_PERL_AND(28419, 5, 9, 4)
86 #if !defined(VMG_COMPAT_ARRAY_PUSH_NOLEN) && VMG_HAS_PERL_OR(25854, 5, 9, 3)
87 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
89 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
92 /* since 5.9.5 - see #43357 */
93 #if VMG_HAS_PERL_OR(31473, 5, 9, 5)
94 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
96 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
99 #if VMG_HAS_PERL_OR(32969, 5, 11, 0)
100 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
102 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
107 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html - but specialized to our needs. */
108 STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
109 #define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
111 sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
112 /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
114 if ((mg = SvMAGIC(sv))) {
117 const MGVTBL* const vtbl = mg->mg_virtual;
119 if (vtbl->svt_clear) {
124 } while ((mg = mg->mg_moremagic));
128 #endif /* VMG_UVAR */
130 /* --- Context-safe global data -------------------------------------------- */
132 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
141 STATIC void vmg_cxt_init
142 #if defined(pMY_CXT) && defined(aMY_CXT)
144 # define vmg_cxt_init() vmg_cxt_init(aTHX_ aMY_CXT)
148 # define vmg_cxt_init() vmg_cxt_init(aTHX)
150 MY_CXT.wizz = newHV();
152 HvSHAREKEYS_off(MY_CXT.wizz);
158 /* --- Signatures ---------------------------------------------------------- */
160 #define SIG_MIN ((U16) (1u << 8))
161 #define SIG_MAX ((U16) ((1u << 16) - 1))
162 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
163 #define SIG_WIZ ((U16) ((1u << 8) - 1))
165 /* ... Generate signatures ................................................. */
167 STATIC U16 vmg_gensig(pTHX) {
168 #define vmg_gensig() vmg_gensig(aTHX)
174 sig = SIG_NBR * Drand01() + SIG_MIN;
175 } while (hv_exists(MY_CXT.wizz, buf, sprintf(buf, "%u", sig)));
180 /* --- MGWIZ structure ----------------------------------------------------- */
187 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
190 #endif /* MGf_COPY */
196 #endif /* MGf_LOCAL */
198 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
199 #endif /* VMG_UVAR */
202 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
203 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
205 /* ... Construct private data .............................................. */
207 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
208 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
210 I32 i, alen = (args == NULL) ? 0 : av_len(args);
219 EXTEND(SP, alen + 1);
220 PUSHs(sv_2mortal(newRV_inc(sv)));
221 for (i = 0; i < alen; ++i)
222 PUSHs(*av_fetch(args, i, 0));
225 count = call_sv(ctor, G_SCALAR);
229 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
231 #if PERL_VERSION_LE(5, 8, 2)
232 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
234 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
245 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
246 MAGIC *mg, *moremagic;
248 if (SvTYPE(sv) >= SVt_PVMG) {
249 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
250 moremagic = mg->mg_moremagic;
251 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
253 if (mg) { return mg->mg_obj; }
259 /* ... Magic cast/dispell .................................................. */
262 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
264 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
266 prevmagic->mg_moremagic = moremagic;
268 SvMAGIC_set(sv, moremagic);
270 mg->mg_moremagic = NULL;
271 Safefree(mg->mg_ptr);
274 #endif /* VMG_UVAR */
276 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
277 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
278 MAGIC *mg = NULL, *moremagic = NULL;
284 if (SvTYPE(sv) >= SVt_PVMG) {
285 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
286 moremagic = mg->mg_moremagic;
287 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
289 if (mg) { return 1; }
292 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
293 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
294 mg->mg_private = w->sig;
297 mg->mg_flags |= MGf_COPY;
298 #endif /* MGf_COPY */
301 mg->mg_flags |= MGf_DUP;
305 mg->mg_flags |= MGf_LOCAL;
306 #endif /* MGf_LOCAL */
309 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
314 uf[0].uf_val = vmg_svt_val;
321 /* One uvar magic in the chain is enough. */
322 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
323 moremagic = mg->mg_moremagic;
324 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
327 if (mg) { /* Found another uvar magic. */
328 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
329 if (olduf->uf_val == vmg_svt_val) {
330 /* It's our uvar magic, nothing to do. */
333 /* It's another uvar magic, backup it and replace it by ours. */
335 vmg_uvar_del(sv, prevmagic, mg, moremagic);
340 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
344 #endif /* VMG_UVAR */
349 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
350 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
353 #endif /* VMG_UVAR */
354 MAGIC *mg, *prevmagic, *moremagic = NULL;
356 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
358 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
359 moremagic = mg->mg_moremagic;
360 if (mg->mg_type == PERL_MAGIC_ext) {
361 if (mg->mg_private == sig) {
363 /* If the current has no uvar, short-circuit uvar deletion. */
364 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
365 #endif /* VMG_UVAR */
368 } else if ((mg->mg_private >= SIG_MIN) &&
369 (mg->mg_private <= SIG_MAX) &&
370 SV2MGWIZ(mg->mg_ptr)->uvar) {
372 /* We can't break here since we need to find the ext magic to delete. */
373 #endif /* VMG_UVAR */
377 if (!mg) { return 0; }
380 prevmagic->mg_moremagic = moremagic;
382 SvMAGIC_set(sv, moremagic);
384 mg->mg_moremagic = NULL;
386 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
387 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
391 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
392 /* mg was the first ext magic in the chain that had uvar */
394 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
395 if ((mg->mg_type == PERL_MAGIC_ext) &&
396 (mg->mg_private >= SIG_MIN) &&
397 (mg->mg_private <= SIG_MAX) &&
398 SV2MGWIZ(mg->mg_ptr)->uvar) {
406 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
407 moremagic = mg->mg_moremagic;
408 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
411 uf = (struct ufuncs *) mg->mg_ptr;
412 /* assert(uf->uf_val == vmg_svt_val); */
413 if (uf[1].uf_val || uf[1].uf_set) {
414 /* Revert the original uvar magic. */
416 Renew(uf, 1, struct ufuncs);
417 mg->mg_ptr = (char *) uf;
418 mg->mg_len = sizeof(struct ufuncs);
420 /* Remove the uvar magic. */
421 vmg_uvar_del(sv, prevmagic, mg, moremagic);
425 #endif /* VMG_UVAR */
430 /* ... svt callbacks ....................................................... */
432 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
445 EXTEND(SP, args + 2);
446 PUSHs(sv_2mortal(newRV_inc(sv)));
447 PUSHs(data ? data : &PL_sv_undef);
449 for (i = 0; i < args; ++i) {
450 SV *sva = va_arg(ap, SV *);
451 PUSHs(sva ? sva : &PL_sv_undef);
456 count = call_sv(cb, G_SCALAR);
460 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
462 ret = SvOK(svr) ? SvIV(svr) : 0;
472 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
473 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
474 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
476 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
477 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
480 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
481 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
484 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
497 PUSHs(sv_2mortal(newRV_inc(sv)));
498 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
499 if (SvTYPE(sv) == SVt_PVAV) {
500 len = av_len((AV *) sv) + 1;
508 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
512 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
514 ret = SvOK(svr) ? SvUV(svr) : len;
524 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
525 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
528 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
529 /* So that it can survive tmp cleanup in vmg_cb_call */
531 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
532 * mg->mg_ptr reference count */
533 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
537 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
538 # if VMG_HAS_PERL_AND(33256, 5, 11, 0)
547 if (keylen == HEf_SVKEY) {
550 keysv = newSVpvn(key, keylen);
553 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
555 if (keylen != HEf_SVKEY) {
561 #endif /* MGf_COPY */
564 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
570 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
571 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
573 #endif /* MGf_LOCAL */
576 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
581 mg = mg_find(sv, PERL_MAGIC_uvar);
582 /* mg can't be NULL or we wouldn't be there. */
584 uf = (struct ufuncs *) mg->mg_ptr;
586 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
587 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
589 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
590 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
592 if ((mg->mg_type != PERL_MAGIC_ext)
593 || (mg->mg_private < SIG_MIN)
594 || (mg->mg_private > SIG_MAX)) { continue; }
595 w = SV2MGWIZ(mg->mg_ptr);
596 if (!w->uvar) { continue; }
599 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
601 case HV_FETCH_ISSTORE:
602 case HV_FETCH_LVALUE:
603 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
604 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
606 case HV_FETCH_ISEXISTS:
607 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
610 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
617 #endif /* VMG_UVAR */
619 /* ... Wizard destructor ................................................... */
621 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
626 if (PL_dirty) /* during global destruction, the context is already freed */
631 if (hv_delete(MY_CXT.wizz, buf, sprintf(buf, "%u", w->sig), 0)) {
634 SvFLAGS(wiz) |= SVf_BREAK;
637 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
638 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
639 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
640 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
641 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
642 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
644 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
645 #endif /* MGf_COPY */
647 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
650 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
651 #endif /* MGf_LOCAL */
653 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
654 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
655 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
656 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
657 #endif /* VMG_UVAR */
664 STATIC MGVTBL vmg_wizard_vtbl = {
669 vmg_wizard_free, /* free */
672 #endif /* MGf_COPY */
678 #endif /* MGf_LOCAL */
681 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
682 STATIC const char vmg_invalid_sv[] = "Invalid variable";
683 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
684 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
685 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
686 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
688 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
689 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
694 } else if (SvNOK(sv)) {
696 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
699 croak(vmg_invalid_sig);
701 if (sig < SIG_MIN) { sig += SIG_MIN; }
702 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
707 #define VMG_SET_CB(S, N) \
709 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
711 #define VMG_SET_SVT_CB(S, N) \
713 if (SvOK(cb) && SvROK(cb)) { \
714 t->svt_ ## N = vmg_svt_ ## N; \
715 w->cb_ ## N = newRV_inc(SvRV(cb)); \
717 t->svt_ ## N = NULL; \
718 w->cb_ ## N = NULL; \
722 /* --- XS ------------------------------------------------------------------ */
724 MODULE = Variable::Magic PACKAGE = Variable::Magic
733 stash = gv_stashpv(__PACKAGE__, 1);
734 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
735 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
736 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
737 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
738 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
739 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
740 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
741 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
742 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
743 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
744 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
745 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
746 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
747 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
748 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
778 #endif /* MGf_COPY */
784 #endif /* MGf_LOCAL */
787 #endif /* VMG_UVAR */
788 ) { croak(vmg_wrongargnum); }
793 sig = vmg_sv2sig(svsig);
794 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
795 ST(0) = sv_2mortal(newRV_inc(*old));
799 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
806 VMG_SET_CB(ST(i++), data);
807 VMG_SET_SVT_CB(ST(i++), get);
808 VMG_SET_SVT_CB(ST(i++), set);
809 VMG_SET_SVT_CB(ST(i++), len);
810 VMG_SET_SVT_CB(ST(i++), clear);
811 VMG_SET_SVT_CB(ST(i++), free);
813 VMG_SET_SVT_CB(ST(i++), copy);
814 #endif /* MGf_COPY */
816 /* VMG_SET_SVT_CB(ST(i++), dup); */
822 VMG_SET_SVT_CB(ST(i++), local);
823 #endif /* MGf_LOCAL */
825 VMG_SET_CB(ST(i++), fetch);
826 VMG_SET_CB(ST(i++), store);
827 VMG_SET_CB(ST(i++), exists);
828 VMG_SET_CB(ST(i++), delete);
829 #endif /* VMG_UVAR */
834 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
835 #endif /* VMG_UVAR */
838 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, -1);
839 mg->mg_private = SIG_WIZ;
842 hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
845 RETVAL = newRV_noinc(sv);
853 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
854 RETVAL = newSVuv(vmg_gensig());
861 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
862 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
866 SV *cast(SV *sv, SV *wiz, ...)
867 PROTOTYPE: \[$@%&*]$@
875 } else if (SvOK(wiz)) {
878 U16 sig = vmg_sv2sig(wiz);
879 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
885 croak(vmg_invalid_sig);
890 av_fill(args, items - 2);
891 for (i = 2; i < items; ++i) {
894 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
897 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
903 SV *getdata(SV *sv, SV *wiz)
911 sig = SV2MGWIZ(SvRV(wiz))->sig;
912 } else if (SvOK(wiz)) {
914 sig = vmg_sv2sig(wiz);
915 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
919 croak(vmg_invalid_wiz);
921 data = vmg_data_get(SvRV(sv), sig);
922 if (!data) { XSRETURN_UNDEF; }
926 SV *dispell(SV *sv, SV *wiz)
933 sig = SV2MGWIZ(SvRV(wiz))->sig;
934 } else if (SvOK(wiz)) {
936 sig = vmg_sv2sig(wiz);
937 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
941 croak(vmg_invalid_wiz);
943 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));