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 /* --- 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 #endif /* VMG_MULTIPLICITY */
205 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
206 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
208 /* ... Construct private data .............................................. */
210 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
211 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
213 I32 i, alen = (args == NULL) ? 0 : av_len(args);
222 EXTEND(SP, alen + 1);
223 PUSHs(sv_2mortal(newRV_inc(sv)));
224 for (i = 0; i < alen; ++i)
225 PUSHs(*av_fetch(args, i, 0));
228 count = call_sv(ctor, G_SCALAR);
232 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
234 #if PERL_VERSION_LE(5, 8, 2)
235 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
237 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
248 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
249 MAGIC *mg, *moremagic;
251 if (SvTYPE(sv) >= SVt_PVMG) {
252 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
253 moremagic = mg->mg_moremagic;
254 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
256 if (mg) { return mg->mg_obj; }
262 /* ... Magic cast/dispell .................................................. */
265 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
267 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
269 prevmagic->mg_moremagic = moremagic;
271 SvMAGIC_set(sv, moremagic);
273 mg->mg_moremagic = NULL;
274 Safefree(mg->mg_ptr);
277 #endif /* VMG_UVAR */
279 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
280 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
281 MAGIC *mg = NULL, *moremagic = NULL;
287 if (SvTYPE(sv) >= SVt_PVMG) {
288 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
289 moremagic = mg->mg_moremagic;
290 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
292 if (mg) { return 1; }
295 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
296 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
297 mg->mg_private = w->sig;
300 mg->mg_flags |= MGf_COPY;
301 #endif /* MGf_COPY */
304 mg->mg_flags |= MGf_DUP;
308 mg->mg_flags |= MGf_LOCAL;
309 #endif /* MGf_LOCAL */
312 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
317 uf[0].uf_val = vmg_svt_val;
324 /* One uvar magic in the chain is enough. */
325 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
326 moremagic = mg->mg_moremagic;
327 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
330 if (mg) { /* Found another uvar magic. */
331 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
332 if (olduf->uf_val == vmg_svt_val) {
333 /* It's our uvar magic, nothing to do. */
336 /* It's another uvar magic, backup it and replace it by ours. */
338 vmg_uvar_del(sv, prevmagic, mg, moremagic);
343 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
347 #endif /* VMG_UVAR */
352 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
353 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
356 #endif /* VMG_UVAR */
357 MAGIC *mg, *prevmagic, *moremagic = NULL;
359 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
361 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
362 moremagic = mg->mg_moremagic;
363 if (mg->mg_type == PERL_MAGIC_ext) {
364 if (mg->mg_private == sig) {
366 /* If the current has no uvar, short-circuit uvar deletion. */
367 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
368 #endif /* VMG_UVAR */
371 } else if ((mg->mg_private >= SIG_MIN) &&
372 (mg->mg_private <= SIG_MAX) &&
373 SV2MGWIZ(mg->mg_ptr)->uvar) {
375 /* We can't break here since we need to find the ext magic to delete. */
376 #endif /* VMG_UVAR */
380 if (!mg) { return 0; }
383 prevmagic->mg_moremagic = moremagic;
385 SvMAGIC_set(sv, moremagic);
387 mg->mg_moremagic = NULL;
389 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
390 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
394 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
395 /* mg was the first ext magic in the chain that had uvar */
397 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
398 if ((mg->mg_type == PERL_MAGIC_ext) &&
399 (mg->mg_private >= SIG_MIN) &&
400 (mg->mg_private <= SIG_MAX) &&
401 SV2MGWIZ(mg->mg_ptr)->uvar) {
409 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
410 moremagic = mg->mg_moremagic;
411 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
414 uf = (struct ufuncs *) mg->mg_ptr;
415 /* assert(uf->uf_val == vmg_svt_val); */
416 if (uf[1].uf_val || uf[1].uf_set) {
417 /* Revert the original uvar magic. */
419 Renew(uf, 1, struct ufuncs);
420 mg->mg_ptr = (char *) uf;
421 mg->mg_len = sizeof(struct ufuncs);
423 /* Remove the uvar magic. */
424 vmg_uvar_del(sv, prevmagic, mg, moremagic);
428 #endif /* VMG_UVAR */
433 /* ... svt callbacks ....................................................... */
435 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
448 EXTEND(SP, args + 2);
449 PUSHs(sv_2mortal(newRV_inc(sv)));
450 PUSHs(data ? data : &PL_sv_undef);
452 for (i = 0; i < args; ++i) {
453 SV *sva = va_arg(ap, SV *);
454 PUSHs(sva ? sva : &PL_sv_undef);
459 count = call_sv(cb, G_SCALAR);
463 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
465 ret = SvOK(svr) ? SvIV(svr) : 0;
475 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
476 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
477 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
479 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
480 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
483 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
484 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
487 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
500 PUSHs(sv_2mortal(newRV_inc(sv)));
501 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
502 if (SvTYPE(sv) == SVt_PVAV) {
503 len = av_len((AV *) sv) + 1;
511 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
515 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
517 ret = SvOK(svr) ? SvUV(svr) : len;
527 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
528 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
531 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
532 /* So that it can survive tmp cleanup in vmg_cb_call */
534 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
535 * mg->mg_ptr reference count */
536 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
540 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
541 # if VMG_HAS_PERL_AND(33256, 5, 11, 0)
550 if (keylen == HEf_SVKEY) {
553 keysv = newSVpvn(key, keylen);
556 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
558 if (keylen != HEf_SVKEY) {
564 #endif /* MGf_COPY */
567 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
573 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
574 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
576 #endif /* MGf_LOCAL */
579 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
584 mg = mg_find(sv, PERL_MAGIC_uvar);
585 /* mg can't be NULL or we wouldn't be there. */
587 uf = (struct ufuncs *) mg->mg_ptr;
589 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
590 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
592 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
593 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
595 if ((mg->mg_type != PERL_MAGIC_ext)
596 || (mg->mg_private < SIG_MIN)
597 || (mg->mg_private > SIG_MAX)) { continue; }
598 w = SV2MGWIZ(mg->mg_ptr);
599 if (!w->uvar) { continue; }
602 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
604 case HV_FETCH_ISSTORE:
605 case HV_FETCH_LVALUE:
606 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
607 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
609 case HV_FETCH_ISEXISTS:
610 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
613 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
620 #endif /* VMG_UVAR */
622 /* ... Wizard destructor ................................................... */
624 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
629 if (PL_dirty) /* during global destruction, the context is already freed */
634 if (w->owner != aTHX)
637 #endif /* VMG_MULTIPLICITY */
639 if (hv_delete(MY_CXT.wizz, buf, sprintf(buf, "%u", w->sig), 0)) {
642 SvFLAGS(wiz) |= SVf_BREAK;
645 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
646 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
647 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
648 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
649 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
650 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
652 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
653 #endif /* MGf_COPY */
655 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
658 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
659 #endif /* MGf_LOCAL */
661 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
662 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
663 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
664 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
665 #endif /* VMG_UVAR */
673 STATIC MGVTBL vmg_wizard_vtbl = {
678 vmg_wizard_free, /* free */
681 #endif /* MGf_COPY */
687 #endif /* MGf_LOCAL */
690 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
691 STATIC const char vmg_invalid_sv[] = "Invalid variable";
692 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
693 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
694 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
695 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
697 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
698 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
703 } else if (SvNOK(sv)) {
705 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
708 croak(vmg_invalid_sig);
710 if (sig < SIG_MIN) { sig += SIG_MIN; }
711 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
716 STATIC U16 vmg_wizard_sig(pTHX_ SV *wiz) {
717 #define vmg_wizard_sig(W) vmg_wizard_sig(aTHX_ (W))
722 sig = SV2MGWIZ(SvRV(wiz))->sig;
723 } else if (SvOK(wiz)) {
724 sig = vmg_sv2sig(wiz);
726 croak(vmg_invalid_wiz);
731 if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))
737 STATIC SV *vmg_wizard_wiz(pTHX_ SV *wiz) {
738 #define vmg_wizard_wiz(W) vmg_wizard_wiz(aTHX_ (W))
746 if (SV2MGWIZ(wiz)->owner == aTHX)
748 #endif /* VMG_MULTIPLICITY */
749 sig = SV2MGWIZ(wiz)->sig;
750 } else if (SvOK(wiz)) {
751 sig = vmg_sv2sig(wiz);
753 croak(vmg_invalid_wiz);
758 return (old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))
762 #define VMG_SET_CB(S, N) \
764 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
766 #define VMG_SET_SVT_CB(S, N) \
768 if (SvOK(cb) && SvROK(cb)) { \
769 t->svt_ ## N = vmg_svt_ ## N; \
770 w->cb_ ## N = newRV_inc(SvRV(cb)); \
772 t->svt_ ## N = NULL; \
773 w->cb_ ## N = NULL; \
778 STATIC SV *vmg_clone(pTHX_ SV *sv, tTHX owner) {
779 #define vmg_clone(P, O) vmg_clone(aTHX_ (P), (O))
781 param.stashes = NULL; /* don't need it unless sv is a PVHV */
783 param.proto_perl = owner;
784 return sv_dup(sv, ¶m);
787 #define VMG_CLONE_CB(N) \
788 z->cb_ ## N = (w->cb_ ## N) ? newRV_noinc(vmg_clone(SvRV(w->cb_ ## N), \
792 STATIC MGWIZ *vmg_wizard_clone(pTHX_ const MGWIZ *w) {
793 #define vmg_wizard_clone(W) vmg_wizard_clone(aTHX_ (W))
798 Copy(w->vtbl, t, 1, MGVTBL);
809 #endif /* MGf_COPY */
815 #endif /* MGf_LOCAL */
819 VMG_CLONE_CB(exists);
820 VMG_CLONE_CB(delete);
821 #endif /* VMG_UVAR */
830 #endif /* VMG_MULTIPLICITY */
832 /* --- XS ------------------------------------------------------------------ */
834 MODULE = Variable::Magic PACKAGE = Variable::Magic
842 MY_CXT.wizz = newHV();
843 hv_iterinit(MY_CXT.wizz); /* Allocate iterator */
845 stash = gv_stashpv(__PACKAGE__, 1);
846 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
847 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
848 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
849 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
850 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
851 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
852 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
853 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
854 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
855 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
856 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
857 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
858 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
859 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
860 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
874 count = MY_CXT.count;
876 hv_iterinit(hv); /* Allocate iterator */
877 hv_iterinit(MY_CXT.wizz);
878 while (key = hv_iternext(MY_CXT.wizz)) {
880 char *sig = HePV(key, len);
884 sv = MGWIZ2SV(vmg_wizard_clone(SV2MGWIZ(HeVAL(key))));
885 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
886 mg->mg_private = SIG_WIZ;
888 hv_store(hv, sig, len, sv, HeHASH(key));
894 MY_CXT.count = count;
896 #endif /* VMG_THREADSAFE */
916 #endif /* MGf_COPY */
922 #endif /* MGf_LOCAL */
925 #endif /* VMG_UVAR */
926 ) { croak(vmg_wrongargnum); }
931 sig = vmg_sv2sig(svsig);
932 if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
933 ST(0) = sv_2mortal(newRV_inc(*old));
937 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
944 VMG_SET_CB(ST(i++), data);
945 VMG_SET_SVT_CB(ST(i++), get);
946 VMG_SET_SVT_CB(ST(i++), set);
947 VMG_SET_SVT_CB(ST(i++), len);
948 VMG_SET_SVT_CB(ST(i++), clear);
949 VMG_SET_SVT_CB(ST(i++), free);
951 VMG_SET_SVT_CB(ST(i++), copy);
952 #endif /* MGf_COPY */
954 /* VMG_SET_SVT_CB(ST(i++), dup); */
960 VMG_SET_SVT_CB(ST(i++), local);
961 #endif /* MGf_LOCAL */
963 VMG_SET_CB(ST(i++), fetch);
964 VMG_SET_CB(ST(i++), store);
965 VMG_SET_CB(ST(i++), exists);
966 VMG_SET_CB(ST(i++), delete);
967 #endif /* VMG_UVAR */
970 #endif /* VMG_MULTIPLICITY */
975 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
976 #endif /* VMG_UVAR */
979 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
980 mg->mg_private = SIG_WIZ;
983 hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
986 RETVAL = newRV_noinc(sv);
994 if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
995 RETVAL = newSVuv(vmg_gensig());
1002 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
1003 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
1007 SV *cast(SV *sv, SV *wiz, ...)
1008 PROTOTYPE: \[$@%&*]$@
1013 wiz = vmg_wizard_wiz(wiz);
1019 av_fill(args, items - 2);
1020 for (i = 2; i < items; ++i) {
1023 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
1026 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
1032 SV *getdata(SV *sv, SV *wiz)
1033 PROTOTYPE: \[$@%&*]$
1038 sig = vmg_wizard_sig(wiz);
1041 data = vmg_data_get(SvRV(sv), sig);
1042 if (!data) { XSRETURN_UNDEF; }
1046 SV *dispell(SV *sv, SV *wiz)
1047 PROTOTYPE: \[$@%&*]$
1051 sig = vmg_wizard_sig(wiz);
1054 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));