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 #define VMG_HAS_PERL_OR(P, R, V, S) ((VMG_PERL_PATCHLEVEL >= (P)) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE((R), (V), (S))))
35 #define VMG_HAS_PERL_AND(P, R, V, S) (PERL_VERSION_GE((R), (V), (S)) && (!VMG_PERL_PATCHLEVEL || (VMG_PERL_PATCHLEVEL >= (P))))
37 /* --- Compatibility ------------------------------------------------------- */
40 # define Newx(v, n, c) New(0, v, n, c)
44 # define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
48 # define mPUSHi(I) PUSHs(sv_2mortal(newSViv(I)))
52 # define MY_CXT vmg_globaldata
54 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
58 #ifndef PERL_MAGIC_ext
59 # define PERL_MAGIC_ext '~'
74 /* uvar magic and Hash::Util::FieldHash were commited with p28419 */
75 #if (VMG_PERL_PATCHLEVEL >= 28419) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 9, 4))
81 #if !defined(VMG_COMPAT_ARRAY_PUSH_NOLEN) && ((VMG_PERL_PATCHLEVEL >= 25854) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 9, 3)))
82 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
84 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
87 /* since 5.9.5 - see #43357 */
88 #if (VMG_PERL_PATCHLEVEL >= 31473) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 9, 5))
89 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
91 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
94 #if (VMG_PERL_PATCHLEVEL >= 32969) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 11, 0))
95 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
97 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
102 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html - but specialized to our needs. */
103 STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
104 #define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
106 sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
107 /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
109 if ((mg = SvMAGIC(sv))) {
112 const MGVTBL* const vtbl = mg->mg_virtual;
114 if (vtbl->svt_clear) {
119 } while ((mg = mg->mg_moremagic));
123 #endif /* VMG_UVAR */
125 /* --- Context-safe global data -------------------------------------------- */
127 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
136 /* --- Signatures ---------------------------------------------------------- */
138 #define SIG_MIN ((U16) (1u << 8))
139 #define SIG_MAX ((U16) ((1u << 16) - 1))
140 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
141 #define SIG_WIZ ((U16) ((1u << 8) - 1))
143 /* ... Generate signatures ................................................. */
145 STATIC U16 vmg_gensig(pTHX) {
146 #define vmg_gensig() vmg_gensig(aTHX)
152 sig = SIG_NBR * Drand01() + SIG_MIN;
153 } while (hv_exists(MY_CXT.wizz, buf, sprintf(buf, "%u", sig)));
158 /* --- MGWIZ structure ----------------------------------------------------- */
165 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
168 #endif /* MGf_COPY */
174 #endif /* MGf_LOCAL */
176 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
177 #endif /* VMG_UVAR */
180 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
181 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
183 /* ... Construct private data .............................................. */
185 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
186 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
196 XPUSHs(sv_2mortal(newRV_inc(sv)));
198 I32 i, alen = av_len(args);
199 for (i = 0; i < alen; ++i) { XPUSHs(*av_fetch(args, i, 0)); }
203 count = call_sv(ctor, G_SCALAR);
207 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
209 #if PERL_VERSION_LE(5, 8, 2)
210 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
212 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
223 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
224 MAGIC *mg, *moremagic;
226 if (SvTYPE(sv) >= SVt_PVMG) {
227 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
228 moremagic = mg->mg_moremagic;
229 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
231 if (mg) { return mg->mg_obj; }
237 /* ... Magic cast/dispell .................................................. */
240 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
242 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
244 prevmagic->mg_moremagic = moremagic;
246 SvMAGIC_set(sv, moremagic);
248 mg->mg_moremagic = NULL;
249 Safefree(mg->mg_ptr);
252 #endif /* VMG_UVAR */
254 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
255 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
256 MAGIC *mg = NULL, *moremagic = NULL;
262 if (SvTYPE(sv) >= SVt_PVMG) {
263 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
264 moremagic = mg->mg_moremagic;
265 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
267 if (mg) { return 1; }
270 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
271 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
272 mg->mg_private = w->sig;
273 mg->mg_flags = mg->mg_flags
276 #endif /* MGf_COPY */
282 #endif /* MGf_LOCAL */
286 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
291 uf[0].uf_val = vmg_svt_val;
298 /* One uvar magic in the chain is enough. */
299 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
300 moremagic = mg->mg_moremagic;
301 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
304 if (mg) { /* Found another uvar magic. */
305 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
306 if (olduf->uf_val == vmg_svt_val) {
307 /* It's our uvar magic, nothing to do. */
310 /* It's another uvar magic, backup it and replace it by ours. */
312 vmg_uvar_del(sv, prevmagic, mg, moremagic);
317 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
321 #endif /* VMG_UVAR */
326 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
327 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
330 #endif /* VMG_UVAR */
331 MAGIC *mg, *prevmagic, *moremagic = NULL;
333 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
335 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
336 moremagic = mg->mg_moremagic;
337 if (mg->mg_type == PERL_MAGIC_ext) {
338 if (mg->mg_private == sig) {
340 /* If the current has no uvar, short-circuit uvar deletion. */
341 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
342 #endif /* VMG_UVAR */
345 } else if ((mg->mg_private >= SIG_MIN) &&
346 (mg->mg_private <= SIG_MAX) &&
347 SV2MGWIZ(mg->mg_ptr)->uvar) {
349 /* We can't break here since we need to find the ext magic to delete. */
350 #endif /* VMG_UVAR */
354 if (!mg) { return 0; }
357 prevmagic->mg_moremagic = moremagic;
359 SvMAGIC_set(sv, moremagic);
361 mg->mg_moremagic = NULL;
363 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
364 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
368 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
369 /* mg was the first ext magic in the chain that had uvar */
371 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
372 if ((mg->mg_type == PERL_MAGIC_ext) &&
373 (mg->mg_private >= SIG_MIN) &&
374 (mg->mg_private <= SIG_MAX) &&
375 SV2MGWIZ(mg->mg_ptr)->uvar) {
383 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
384 moremagic = mg->mg_moremagic;
385 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
388 uf = (struct ufuncs *) mg->mg_ptr;
389 /* assert(uf->uf_val == vmg_svt_val); */
390 if (uf[1].uf_val || uf[1].uf_set) {
391 /* Revert the original uvar magic. */
393 Renew(uf, 1, struct ufuncs);
394 mg->mg_ptr = (char *) uf;
395 mg->mg_len = sizeof(struct ufuncs);
397 /* Remove the uvar magic. */
398 vmg_uvar_del(sv, prevmagic, mg, moremagic);
402 #endif /* VMG_UVAR */
407 /* ... svt callbacks ....................................................... */
409 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
422 EXTEND(SP, args + 2);
423 PUSHs(sv_2mortal(newRV_inc(sv)));
424 PUSHs(data ? data : &PL_sv_undef);
426 for (i = 0; i < args; ++i) {
427 SV *sva = va_arg(ap, SV *);
428 PUSHs(sva ? sva : &PL_sv_undef);
433 count = call_sv(cb, G_SCALAR);
437 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
439 ret = SvOK(svr) ? SvIV(svr) : 0;
449 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
450 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
451 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
453 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
454 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
457 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
458 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
461 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
474 PUSHs(sv_2mortal(newRV_inc(sv)));
475 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
476 if (SvTYPE(sv) == SVt_PVAV) {
477 len = av_len((AV *) sv) + 1;
485 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
489 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
491 ret = SvOK(svr) ? SvUV(svr) : len;
501 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
502 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
505 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
506 /* So that it can survive tmp cleanup in vmg_cb_call */
508 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
509 * mg->mg_ptr reference count */
510 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
514 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
515 # if (VMG_PERL_PATCHLEVEL >= 33256) || (!VMG_PERL_PATCHLEVEL && PERL_API_VERSION_GE(5, 11, 0))
524 if (keylen == HEf_SVKEY) {
527 keysv = newSVpvn(key, keylen);
530 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
532 if (keylen != HEf_SVKEY) {
538 #endif /* MGf_COPY */
541 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
547 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
548 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
550 #endif /* MGf_LOCAL */
553 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
558 mg = mg_find(sv, PERL_MAGIC_uvar);
559 /* mg can't be NULL or we wouldn't be there. */
561 uf = (struct ufuncs *) mg->mg_ptr;
563 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
564 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
566 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
567 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
569 if ((mg->mg_type != PERL_MAGIC_ext)
570 || (mg->mg_private < SIG_MIN)
571 || (mg->mg_private > SIG_MAX)) { continue; }
572 w = SV2MGWIZ(mg->mg_ptr);
573 if (!w->uvar) { continue; }
576 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
578 case HV_FETCH_ISSTORE:
579 case HV_FETCH_LVALUE:
580 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
581 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
583 case HV_FETCH_ISEXISTS:
584 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
587 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
594 #endif /* VMG_UVAR */
596 /* ... Wizard destructor ................................................... */
598 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
605 SvREFCNT_inc(wiz); /* Fake survival - it's gonna be deleted anyway */
606 #if PERL_API_VERSION_GE(5, 9, 5)
607 SvREFCNT_inc(wiz); /* One more push */
609 if (hv_delete(MY_CXT.wizz, buf, sprintf(buf, "%u", w->sig), 0)) {
613 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
614 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
615 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
616 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
617 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
618 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
620 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
621 #endif /* MGf_COPY */
623 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
626 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
627 #endif /* MGf_LOCAL */
629 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
630 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
631 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
632 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
633 #endif /* VMG_UVAR */
640 STATIC MGVTBL vmg_wizard_vtbl = {
645 vmg_wizard_free, /* free */
648 #endif /* MGf_COPY */
654 #endif /* MGf_LOCAL */
657 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
658 STATIC const char vmg_invalid_sv[] = "Invalid variable";
659 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
660 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
661 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
662 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
664 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
665 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
670 } else if (SvNOK(sv)) {
672 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
675 croak(vmg_invalid_sig);
677 if (sig < SIG_MIN) { sig += SIG_MIN; }
678 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
683 #define VMG_SET_CB(S, N) \
685 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
687 #define VMG_SET_SVT_CB(S, N) \
689 if (SvOK(cb) && SvROK(cb)) { \
690 t->svt_ ## N = vmg_svt_ ## N; \
691 w->cb_ ## N = newRV_inc(SvRV(cb)); \
693 t->svt_ ## N = NULL; \
694 w->cb_ ## N = NULL; \
698 /* --- XS ------------------------------------------------------------------ */
700 MODULE = Variable::Magic PACKAGE = Variable::Magic
708 MY_CXT.wizz = newHV();
710 stash = gv_stashpv(__PACKAGE__, 1);
711 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
712 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
713 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
714 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
715 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
716 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
717 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
718 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
719 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
720 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
721 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
722 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
723 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
744 #endif /* MGf_COPY */
750 #endif /* MGf_LOCAL */
753 #endif /* VMG_UVAR */
754 ) { croak(vmg_wrongargnum); }
759 sig = vmg_sv2sig(svsig);
760 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
761 ST(0) = sv_2mortal(newRV_inc(*old));
765 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
772 VMG_SET_CB(ST(i++), data);
773 VMG_SET_SVT_CB(ST(i++), get);
774 VMG_SET_SVT_CB(ST(i++), set);
775 VMG_SET_SVT_CB(ST(i++), len);
776 VMG_SET_SVT_CB(ST(i++), clear);
777 VMG_SET_SVT_CB(ST(i++), free);
779 VMG_SET_SVT_CB(ST(i++), copy);
780 #endif /* MGf_COPY */
782 /* VMG_SET_SVT_CB(ST(i++), dup); */
788 VMG_SET_SVT_CB(ST(i++), local);
789 #endif /* MGf_LOCAL */
791 VMG_SET_CB(ST(i++), fetch);
792 VMG_SET_CB(ST(i++), store);
793 VMG_SET_CB(ST(i++), exists);
794 VMG_SET_CB(ST(i++), delete);
795 #endif /* VMG_UVAR */
800 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
801 #endif /* VMG_UVAR */
804 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, -1);
805 mg->mg_private = SIG_WIZ;
807 hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
810 RETVAL = newRV_noinc(sv);
818 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
819 RETVAL = newSVuv(vmg_gensig());
826 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
827 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
831 SV *cast(SV *sv, SV *wiz, ...)
832 PROTOTYPE: \[$@%&*]$@
840 } else if (SvOK(wiz)) {
843 U16 sig = vmg_sv2sig(wiz);
844 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
850 croak(vmg_invalid_sig);
855 av_fill(args, items - 2);
856 for (i = 2; i < items; ++i) {
859 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
862 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
868 SV *getdata(SV *sv, SV *wiz)
876 sig = SV2MGWIZ(SvRV(wiz))->sig;
877 } else if (SvOK(wiz)) {
879 sig = vmg_sv2sig(wiz);
880 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
884 croak(vmg_invalid_wiz);
886 data = vmg_data_get(SvRV(sv), sig);
887 if (!data) { XSRETURN_UNDEF; }
891 SV *dispell(SV *sv, SV *wiz)
898 sig = SV2MGWIZ(SvRV(wiz))->sig;
899 } else if (SvOK(wiz)) {
901 sig = vmg_sv2sig(wiz);
902 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
906 croak(vmg_invalid_wiz);
908 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));