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 /* --- Threads and multiplicity -------------------------------------------- */
43 #if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
44 # define VMG_MULTIPLICITY 1
46 # define tTHX PerlInterpreter*
49 # define VMG_MULTIPLICITY 0
52 #if VMG_MULTIPLICITY && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && defined(MY_CXT_CLONE)
53 # define VMG_THREADSAFE 1
55 # define VMG_THREADSAFE 0
57 # define dMY_CXT dNOOP
59 # define MY_CXT vmg_globaldata
61 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
63 # define MY_CXT_INIT NOOP
65 # define MY_CXT_CLONE NOOP
68 /* --- Compatibility ------------------------------------------------------- */
71 # define Newx(v, n, c) New(0, v, n, c)
75 # define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
79 # define mPUSHi(I) PUSHs(sv_2mortal(newSViv(I)))
82 #ifndef PERL_MAGIC_ext
83 # define PERL_MAGIC_ext '~'
98 /* uvar magic and Hash::Util::FieldHash were commited with p28419 */
99 #if VMG_HAS_PERL_AND(28419, 5, 9, 4)
105 #if !defined(VMG_COMPAT_ARRAY_PUSH_NOLEN) && VMG_HAS_PERL_OR(25854, 5, 9, 3)
106 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
108 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
111 /* since 5.9.5 - see #43357 */
112 #if VMG_HAS_PERL_OR(31473, 5, 9, 5)
113 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
115 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
118 #if VMG_HAS_PERL_OR(32969, 5, 11, 0)
119 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
121 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
126 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html - but specialized to our needs. */
127 STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
128 #define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
130 sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
131 /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
133 if ((mg = SvMAGIC(sv))) {
136 const MGVTBL* const vtbl = mg->mg_virtual;
138 if (vtbl->svt_clear) {
143 } while ((mg = mg->mg_moremagic));
147 #endif /* VMG_UVAR */
149 /* --- Context-safe global data -------------------------------------------- */
151 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
160 STATIC void vmg_cxt_init
161 #if defined(pMY_CXT) && defined(aMY_CXT)
163 # define vmg_cxt_init() vmg_cxt_init(aTHX_ aMY_CXT)
167 # define vmg_cxt_init() vmg_cxt_init(aTHX)
169 MY_CXT.wizz = newHV();
171 HvSHAREKEYS_off(MY_CXT.wizz);
177 /* --- Signatures ---------------------------------------------------------- */
179 #define SIG_MIN ((U16) (1u << 8))
180 #define SIG_MAX ((U16) ((1u << 16) - 1))
181 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
182 #define SIG_WIZ ((U16) ((1u << 8) - 1))
184 /* ... Generate signatures ................................................. */
186 STATIC U16 vmg_gensig(pTHX) {
187 #define vmg_gensig() vmg_gensig(aTHX)
193 sig = SIG_NBR * Drand01() + SIG_MIN;
194 } while (hv_exists(MY_CXT.wizz, buf, sprintf(buf, "%u", sig)));
199 /* --- MGWIZ structure ----------------------------------------------------- */
206 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
209 #endif /* MGf_COPY */
215 #endif /* MGf_LOCAL */
217 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
218 #endif /* VMG_UVAR */
221 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
222 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
224 /* ... Construct private data .............................................. */
226 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
227 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
229 I32 i, alen = (args == NULL) ? 0 : av_len(args);
238 EXTEND(SP, alen + 1);
239 PUSHs(sv_2mortal(newRV_inc(sv)));
240 for (i = 0; i < alen; ++i)
241 PUSHs(*av_fetch(args, i, 0));
244 count = call_sv(ctor, G_SCALAR);
248 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
250 #if PERL_VERSION_LE(5, 8, 2)
251 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
253 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
264 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
265 MAGIC *mg, *moremagic;
267 if (SvTYPE(sv) >= SVt_PVMG) {
268 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
269 moremagic = mg->mg_moremagic;
270 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
272 if (mg) { return mg->mg_obj; }
278 /* ... Magic cast/dispell .................................................. */
281 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
283 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
285 prevmagic->mg_moremagic = moremagic;
287 SvMAGIC_set(sv, moremagic);
289 mg->mg_moremagic = NULL;
290 Safefree(mg->mg_ptr);
293 #endif /* VMG_UVAR */
295 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
296 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
297 MAGIC *mg = NULL, *moremagic = NULL;
303 if (SvTYPE(sv) >= SVt_PVMG) {
304 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
305 moremagic = mg->mg_moremagic;
306 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
308 if (mg) { return 1; }
311 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
312 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
313 mg->mg_private = w->sig;
316 mg->mg_flags |= MGf_COPY;
317 #endif /* MGf_COPY */
320 mg->mg_flags |= MGf_DUP;
324 mg->mg_flags |= MGf_LOCAL;
325 #endif /* MGf_LOCAL */
328 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
333 uf[0].uf_val = vmg_svt_val;
340 /* One uvar magic in the chain is enough. */
341 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
342 moremagic = mg->mg_moremagic;
343 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
346 if (mg) { /* Found another uvar magic. */
347 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
348 if (olduf->uf_val == vmg_svt_val) {
349 /* It's our uvar magic, nothing to do. */
352 /* It's another uvar magic, backup it and replace it by ours. */
354 vmg_uvar_del(sv, prevmagic, mg, moremagic);
359 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
363 #endif /* VMG_UVAR */
368 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
369 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
372 #endif /* VMG_UVAR */
373 MAGIC *mg, *prevmagic, *moremagic = NULL;
375 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
377 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
378 moremagic = mg->mg_moremagic;
379 if (mg->mg_type == PERL_MAGIC_ext) {
380 if (mg->mg_private == sig) {
382 /* If the current has no uvar, short-circuit uvar deletion. */
383 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
384 #endif /* VMG_UVAR */
387 } else if ((mg->mg_private >= SIG_MIN) &&
388 (mg->mg_private <= SIG_MAX) &&
389 SV2MGWIZ(mg->mg_ptr)->uvar) {
391 /* We can't break here since we need to find the ext magic to delete. */
392 #endif /* VMG_UVAR */
396 if (!mg) { return 0; }
399 prevmagic->mg_moremagic = moremagic;
401 SvMAGIC_set(sv, moremagic);
403 mg->mg_moremagic = NULL;
405 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
406 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
410 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
411 /* mg was the first ext magic in the chain that had uvar */
413 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
414 if ((mg->mg_type == PERL_MAGIC_ext) &&
415 (mg->mg_private >= SIG_MIN) &&
416 (mg->mg_private <= SIG_MAX) &&
417 SV2MGWIZ(mg->mg_ptr)->uvar) {
425 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
426 moremagic = mg->mg_moremagic;
427 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
430 uf = (struct ufuncs *) mg->mg_ptr;
431 /* assert(uf->uf_val == vmg_svt_val); */
432 if (uf[1].uf_val || uf[1].uf_set) {
433 /* Revert the original uvar magic. */
435 Renew(uf, 1, struct ufuncs);
436 mg->mg_ptr = (char *) uf;
437 mg->mg_len = sizeof(struct ufuncs);
439 /* Remove the uvar magic. */
440 vmg_uvar_del(sv, prevmagic, mg, moremagic);
444 #endif /* VMG_UVAR */
449 /* ... svt callbacks ....................................................... */
451 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
464 EXTEND(SP, args + 2);
465 PUSHs(sv_2mortal(newRV_inc(sv)));
466 PUSHs(data ? data : &PL_sv_undef);
468 for (i = 0; i < args; ++i) {
469 SV *sva = va_arg(ap, SV *);
470 PUSHs(sva ? sva : &PL_sv_undef);
475 count = call_sv(cb, G_SCALAR);
479 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
481 ret = SvOK(svr) ? SvIV(svr) : 0;
491 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
492 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
493 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
495 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
496 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
499 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
500 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
503 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
516 PUSHs(sv_2mortal(newRV_inc(sv)));
517 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
518 if (SvTYPE(sv) == SVt_PVAV) {
519 len = av_len((AV *) sv) + 1;
527 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
531 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
533 ret = SvOK(svr) ? SvUV(svr) : len;
543 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
544 return vmg_cb_call1(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_call1(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 VMG_HAS_PERL_AND(33256, 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_call1(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) {
645 if (PL_dirty) /* during global destruction, the context is already freed */
650 if (hv_delete(MY_CXT.wizz, buf, sprintf(buf, "%u", w->sig), 0)) {
653 SvFLAGS(wiz) |= SVf_BREAK;
656 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
657 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
658 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
659 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
660 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
661 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
663 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
664 #endif /* MGf_COPY */
666 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
669 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
670 #endif /* MGf_LOCAL */
672 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
673 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
674 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
675 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
676 #endif /* VMG_UVAR */
683 STATIC MGVTBL vmg_wizard_vtbl = {
688 vmg_wizard_free, /* free */
691 #endif /* MGf_COPY */
697 #endif /* MGf_LOCAL */
700 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
701 STATIC const char vmg_invalid_sv[] = "Invalid variable";
702 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
703 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
704 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
705 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
707 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
708 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
713 } else if (SvNOK(sv)) {
715 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
718 croak(vmg_invalid_sig);
720 if (sig < SIG_MIN) { sig += SIG_MIN; }
721 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
726 #define VMG_SET_CB(S, N) \
728 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
730 #define VMG_SET_SVT_CB(S, N) \
732 if (SvOK(cb) && SvROK(cb)) { \
733 t->svt_ ## N = vmg_svt_ ## N; \
734 w->cb_ ## N = newRV_inc(SvRV(cb)); \
736 t->svt_ ## N = NULL; \
737 w->cb_ ## N = NULL; \
741 /* --- XS ------------------------------------------------------------------ */
743 MODULE = Variable::Magic PACKAGE = Variable::Magic
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));
764 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
765 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
766 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
767 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
797 #endif /* MGf_COPY */
803 #endif /* MGf_LOCAL */
806 #endif /* VMG_UVAR */
807 ) { croak(vmg_wrongargnum); }
812 sig = vmg_sv2sig(svsig);
813 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
814 ST(0) = sv_2mortal(newRV_inc(*old));
818 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
825 VMG_SET_CB(ST(i++), data);
826 VMG_SET_SVT_CB(ST(i++), get);
827 VMG_SET_SVT_CB(ST(i++), set);
828 VMG_SET_SVT_CB(ST(i++), len);
829 VMG_SET_SVT_CB(ST(i++), clear);
830 VMG_SET_SVT_CB(ST(i++), free);
832 VMG_SET_SVT_CB(ST(i++), copy);
833 #endif /* MGf_COPY */
835 /* VMG_SET_SVT_CB(ST(i++), dup); */
841 VMG_SET_SVT_CB(ST(i++), local);
842 #endif /* MGf_LOCAL */
844 VMG_SET_CB(ST(i++), fetch);
845 VMG_SET_CB(ST(i++), store);
846 VMG_SET_CB(ST(i++), exists);
847 VMG_SET_CB(ST(i++), delete);
848 #endif /* VMG_UVAR */
853 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
854 #endif /* VMG_UVAR */
857 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, -1);
858 mg->mg_private = SIG_WIZ;
861 hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
864 RETVAL = newRV_noinc(sv);
872 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
873 RETVAL = newSVuv(vmg_gensig());
880 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
881 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
885 SV *cast(SV *sv, SV *wiz, ...)
886 PROTOTYPE: \[$@%&*]$@
894 } else if (SvOK(wiz)) {
897 U16 sig = vmg_sv2sig(wiz);
898 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
904 croak(vmg_invalid_sig);
909 av_fill(args, items - 2);
910 for (i = 2; i < items; ++i) {
913 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
916 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
922 SV *getdata(SV *sv, SV *wiz)
930 sig = SV2MGWIZ(SvRV(wiz))->sig;
931 } else if (SvOK(wiz)) {
933 sig = vmg_sv2sig(wiz);
934 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
938 croak(vmg_invalid_wiz);
940 data = vmg_data_get(SvRV(sv), sig);
941 if (!data) { XSRETURN_UNDEF; }
945 SV *dispell(SV *sv, SV *wiz)
952 sig = SV2MGWIZ(SvRV(wiz))->sig;
953 } else if (SvOK(wiz)) {
955 sig = vmg_sv2sig(wiz);
956 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
960 croak(vmg_invalid_wiz);
962 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));