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 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 #ifndef VMG_PERL_PATCHLEVEL
21 # define VMG_PERL_PATCHLEVEL PERL_PATCHNUM
23 # define VMG_PERL_PATCHLEVEL 0
27 #define VMG_HAS_PERL_OR(P, R, V, S) ((VMG_PERL_PATCHLEVEL >= (P)) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE((R), (V), (S))))
29 #define VMG_HAS_PERL_AND(P, R, V, S) (PERL_VERSION_GE((R), (V), (S)) && (!VMG_PERL_PATCHLEVEL || (VMG_PERL_PATCHLEVEL >= (P))))
31 /* --- Threads and multiplicity -------------------------------------------- */
41 #if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
42 # define VMG_MULTIPLICITY 1
44 # define tTHX PerlInterpreter*
47 # define VMG_MULTIPLICITY 0
50 #if VMG_MULTIPLICITY && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && defined(MY_CXT_CLONE)
51 # define VMG_THREADSAFE 1
53 # define VMG_THREADSAFE 0
55 # define dMY_CXT dNOOP
57 # define MY_CXT vmg_globaldata
59 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
61 # define MY_CXT_INIT NOOP
63 # define MY_CXT_CLONE NOOP
66 /* --- Compatibility ------------------------------------------------------- */
69 # define Newx(v, n, c) New(0, v, n, c)
73 # define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
77 # define mPUSHi(I) PUSHs(sv_2mortal(newSViv(I)))
80 #ifndef PERL_MAGIC_ext
81 # define PERL_MAGIC_ext '~'
96 /* uvar magic and Hash::Util::FieldHash were commited with p28419 */
97 #if VMG_HAS_PERL_AND(28419, 5, 9, 4)
103 #if !defined(VMG_COMPAT_ARRAY_PUSH_NOLEN) && VMG_HAS_PERL_OR(25854, 5, 9, 3)
104 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
106 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
109 /* since 5.9.5 - see #43357 */
110 #if VMG_HAS_PERL_OR(31473, 5, 9, 5)
111 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
113 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
116 #if VMG_HAS_PERL_OR(32969, 5, 11, 0)
117 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
119 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
124 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html - but specialized to our needs. */
125 STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
126 #define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
128 sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
129 /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
131 if ((mg = SvMAGIC(sv))) {
134 const MGVTBL* const vtbl = mg->mg_virtual;
136 if (vtbl->svt_clear) {
141 } while ((mg = mg->mg_moremagic));
145 #endif /* VMG_UVAR */
147 /* --- Context-safe global data -------------------------------------------- */
149 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
158 STATIC void vmg_cxt_init
159 #if defined(pMY_CXT) && defined(aMY_CXT)
161 # define vmg_cxt_init() vmg_cxt_init(aTHX_ aMY_CXT)
165 # define vmg_cxt_init() vmg_cxt_init(aTHX)
167 MY_CXT.wizz = newHV();
169 HvSHAREKEYS_off(MY_CXT.wizz);
175 /* --- Signatures ---------------------------------------------------------- */
177 #define SIG_MIN ((U16) (1u << 8))
178 #define SIG_MAX ((U16) ((1u << 16) - 1))
179 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
180 #define SIG_WIZ ((U16) ((1u << 8) - 1))
182 /* ... Generate signatures ................................................. */
184 STATIC U16 vmg_gensig(pTHX) {
185 #define vmg_gensig() vmg_gensig(aTHX)
191 sig = SIG_NBR * Drand01() + SIG_MIN;
192 } while (hv_exists(MY_CXT.wizz, buf, sprintf(buf, "%u", sig)));
197 /* --- MGWIZ structure ----------------------------------------------------- */
204 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
207 #endif /* MGf_COPY */
213 #endif /* MGf_LOCAL */
215 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
216 #endif /* VMG_UVAR */
219 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
220 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
222 /* ... Construct private data .............................................. */
224 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
225 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
227 I32 i, alen = (args == NULL) ? 0 : av_len(args);
236 EXTEND(SP, alen + 1);
237 PUSHs(sv_2mortal(newRV_inc(sv)));
238 for (i = 0; i < alen; ++i)
239 PUSHs(*av_fetch(args, i, 0));
242 count = call_sv(ctor, G_SCALAR);
246 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
248 #if PERL_VERSION_LE(5, 8, 2)
249 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
251 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
262 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
263 MAGIC *mg, *moremagic;
265 if (SvTYPE(sv) >= SVt_PVMG) {
266 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
267 moremagic = mg->mg_moremagic;
268 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
270 if (mg) { return mg->mg_obj; }
276 /* ... Magic cast/dispell .................................................. */
279 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
281 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
283 prevmagic->mg_moremagic = moremagic;
285 SvMAGIC_set(sv, moremagic);
287 mg->mg_moremagic = NULL;
288 Safefree(mg->mg_ptr);
291 #endif /* VMG_UVAR */
293 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
294 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
295 MAGIC *mg = NULL, *moremagic = NULL;
301 if (SvTYPE(sv) >= SVt_PVMG) {
302 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
303 moremagic = mg->mg_moremagic;
304 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
306 if (mg) { return 1; }
309 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
310 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
311 mg->mg_private = w->sig;
314 mg->mg_flags |= MGf_COPY;
315 #endif /* MGf_COPY */
318 mg->mg_flags |= MGf_DUP;
322 mg->mg_flags |= MGf_LOCAL;
323 #endif /* MGf_LOCAL */
326 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
331 uf[0].uf_val = vmg_svt_val;
338 /* One uvar magic in the chain is enough. */
339 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
340 moremagic = mg->mg_moremagic;
341 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
344 if (mg) { /* Found another uvar magic. */
345 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
346 if (olduf->uf_val == vmg_svt_val) {
347 /* It's our uvar magic, nothing to do. */
350 /* It's another uvar magic, backup it and replace it by ours. */
352 vmg_uvar_del(sv, prevmagic, mg, moremagic);
357 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
361 #endif /* VMG_UVAR */
366 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
367 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
370 #endif /* VMG_UVAR */
371 MAGIC *mg, *prevmagic, *moremagic = NULL;
373 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
375 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
376 moremagic = mg->mg_moremagic;
377 if (mg->mg_type == PERL_MAGIC_ext) {
378 if (mg->mg_private == sig) {
380 /* If the current has no uvar, short-circuit uvar deletion. */
381 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
382 #endif /* VMG_UVAR */
385 } else if ((mg->mg_private >= SIG_MIN) &&
386 (mg->mg_private <= SIG_MAX) &&
387 SV2MGWIZ(mg->mg_ptr)->uvar) {
389 /* We can't break here since we need to find the ext magic to delete. */
390 #endif /* VMG_UVAR */
394 if (!mg) { return 0; }
397 prevmagic->mg_moremagic = moremagic;
399 SvMAGIC_set(sv, moremagic);
401 mg->mg_moremagic = NULL;
403 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
404 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
408 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
409 /* mg was the first ext magic in the chain that had uvar */
411 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
412 if ((mg->mg_type == PERL_MAGIC_ext) &&
413 (mg->mg_private >= SIG_MIN) &&
414 (mg->mg_private <= SIG_MAX) &&
415 SV2MGWIZ(mg->mg_ptr)->uvar) {
423 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
424 moremagic = mg->mg_moremagic;
425 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
428 uf = (struct ufuncs *) mg->mg_ptr;
429 /* assert(uf->uf_val == vmg_svt_val); */
430 if (uf[1].uf_val || uf[1].uf_set) {
431 /* Revert the original uvar magic. */
433 Renew(uf, 1, struct ufuncs);
434 mg->mg_ptr = (char *) uf;
435 mg->mg_len = sizeof(struct ufuncs);
437 /* Remove the uvar magic. */
438 vmg_uvar_del(sv, prevmagic, mg, moremagic);
442 #endif /* VMG_UVAR */
447 /* ... svt callbacks ....................................................... */
449 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
462 EXTEND(SP, args + 2);
463 PUSHs(sv_2mortal(newRV_inc(sv)));
464 PUSHs(data ? data : &PL_sv_undef);
466 for (i = 0; i < args; ++i) {
467 SV *sva = va_arg(ap, SV *);
468 PUSHs(sva ? sva : &PL_sv_undef);
473 count = call_sv(cb, G_SCALAR);
477 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
479 ret = SvOK(svr) ? SvIV(svr) : 0;
489 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
490 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
491 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
493 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
494 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
497 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
498 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
501 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
514 PUSHs(sv_2mortal(newRV_inc(sv)));
515 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
516 if (SvTYPE(sv) == SVt_PVAV) {
517 len = av_len((AV *) sv) + 1;
525 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
529 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
531 ret = SvOK(svr) ? SvUV(svr) : len;
541 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
542 return vmg_cb_call1(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_call1(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,
555 # if VMG_HAS_PERL_AND(33256, 5, 11, 0)
564 if (keylen == HEf_SVKEY) {
567 keysv = newSVpvn(key, keylen);
570 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
572 if (keylen != HEf_SVKEY) {
578 #endif /* MGf_COPY */
581 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
587 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
588 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
590 #endif /* MGf_LOCAL */
593 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
598 mg = mg_find(sv, PERL_MAGIC_uvar);
599 /* mg can't be NULL or we wouldn't be there. */
601 uf = (struct ufuncs *) mg->mg_ptr;
603 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
604 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
606 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
607 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
609 if ((mg->mg_type != PERL_MAGIC_ext)
610 || (mg->mg_private < SIG_MIN)
611 || (mg->mg_private > SIG_MAX)) { continue; }
612 w = SV2MGWIZ(mg->mg_ptr);
613 if (!w->uvar) { continue; }
616 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
618 case HV_FETCH_ISSTORE:
619 case HV_FETCH_LVALUE:
620 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
621 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
623 case HV_FETCH_ISEXISTS:
624 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
627 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
634 #endif /* VMG_UVAR */
636 /* ... Wizard destructor ................................................... */
638 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
643 if (PL_dirty) /* during global destruction, the context is already freed */
648 if (hv_delete(MY_CXT.wizz, buf, sprintf(buf, "%u", w->sig), 0)) {
651 SvFLAGS(wiz) |= SVf_BREAK;
654 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
655 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
656 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
657 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
658 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
659 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
661 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
662 #endif /* MGf_COPY */
664 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
667 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
668 #endif /* MGf_LOCAL */
670 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
671 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
672 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
673 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
674 #endif /* VMG_UVAR */
681 STATIC MGVTBL vmg_wizard_vtbl = {
686 vmg_wizard_free, /* free */
689 #endif /* MGf_COPY */
695 #endif /* MGf_LOCAL */
698 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
699 STATIC const char vmg_invalid_sv[] = "Invalid variable";
700 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
701 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
702 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
703 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
705 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
706 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
711 } else if (SvNOK(sv)) {
713 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
716 croak(vmg_invalid_sig);
718 if (sig < SIG_MIN) { sig += SIG_MIN; }
719 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
724 #define VMG_SET_CB(S, N) \
726 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
728 #define VMG_SET_SVT_CB(S, N) \
730 if (SvOK(cb) && SvROK(cb)) { \
731 t->svt_ ## N = vmg_svt_ ## N; \
732 w->cb_ ## N = newRV_inc(SvRV(cb)); \
734 t->svt_ ## N = NULL; \
735 w->cb_ ## N = NULL; \
739 /* --- XS ------------------------------------------------------------------ */
741 MODULE = Variable::Magic PACKAGE = Variable::Magic
750 stash = gv_stashpv(__PACKAGE__, 1);
751 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
752 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
753 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
754 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
755 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
756 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
757 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
758 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
759 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
760 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
761 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
762 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
763 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
764 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
765 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
795 #endif /* MGf_COPY */
801 #endif /* MGf_LOCAL */
804 #endif /* VMG_UVAR */
805 ) { croak(vmg_wrongargnum); }
810 sig = vmg_sv2sig(svsig);
811 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
812 ST(0) = sv_2mortal(newRV_inc(*old));
816 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
823 VMG_SET_CB(ST(i++), data);
824 VMG_SET_SVT_CB(ST(i++), get);
825 VMG_SET_SVT_CB(ST(i++), set);
826 VMG_SET_SVT_CB(ST(i++), len);
827 VMG_SET_SVT_CB(ST(i++), clear);
828 VMG_SET_SVT_CB(ST(i++), free);
830 VMG_SET_SVT_CB(ST(i++), copy);
831 #endif /* MGf_COPY */
833 /* VMG_SET_SVT_CB(ST(i++), dup); */
839 VMG_SET_SVT_CB(ST(i++), local);
840 #endif /* MGf_LOCAL */
842 VMG_SET_CB(ST(i++), fetch);
843 VMG_SET_CB(ST(i++), store);
844 VMG_SET_CB(ST(i++), exists);
845 VMG_SET_CB(ST(i++), delete);
846 #endif /* VMG_UVAR */
851 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
852 #endif /* VMG_UVAR */
855 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
856 mg->mg_private = SIG_WIZ;
859 hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
862 RETVAL = newRV_noinc(sv);
870 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
871 RETVAL = newSVuv(vmg_gensig());
878 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
879 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
883 SV *cast(SV *sv, SV *wiz, ...)
884 PROTOTYPE: \[$@%&*]$@
892 } else if (SvOK(wiz)) {
895 U16 sig = vmg_sv2sig(wiz);
896 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
902 croak(vmg_invalid_sig);
907 av_fill(args, items - 2);
908 for (i = 2; i < items; ++i) {
911 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
914 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
920 SV *getdata(SV *sv, SV *wiz)
928 sig = SV2MGWIZ(SvRV(wiz))->sig;
929 } else if (SvOK(wiz)) {
931 sig = vmg_sv2sig(wiz);
932 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
936 croak(vmg_invalid_wiz);
938 data = vmg_data_get(SvRV(sv), sig);
939 if (!data) { XSRETURN_UNDEF; }
943 SV *dispell(SV *sv, SV *wiz)
950 sig = SV2MGWIZ(SvRV(wiz))->sig;
951 } else if (SvOK(wiz)) {
953 sig = vmg_sv2sig(wiz);
954 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
958 croak(vmg_invalid_wiz);
960 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));