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 #ifndef VMG_PERL_PATCHLEVEL
17 # define VMG_PERL_PATCHLEVEL PERL_PATCHNUM
19 # define VMG_PERL_PATCHLEVEL 0
23 #define VMG_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
25 #define VMG_HAS_PERL_BRANCH(R, V, S) (PERL_REVISION == (R) && PERL_VERSION == (V) && PERL_SUBVERSION >= (S))
27 #define VMG_HAS_PERL_MAINT(R, V, S, P) (PERL_REVISION == (R) && PERL_VERSION == (V) && (VMG_PERL_PATCHLEVEL >= (P) || (!VMG_PERL_PATCHLEVEL && PERL_SUBVERSION >= (S))))
29 /* --- Threads and multiplicity -------------------------------------------- */
39 #ifndef VMG_MULTIPLICITY
40 # if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
41 # define VMG_MULTIPLICITY 1
43 # define VMG_MULTIPLICITY 0
46 #if VMG_MULTIPLICITY && !defined(tTHX)
47 # define tTHX PerlInterpreter*
50 #if VMG_MULTIPLICITY && defined(USE_ITHREADS) && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && (defined(MY_CXT_CLONE) || defined(dMY_CXT_SV))
51 # define VMG_THREADSAFE 1
53 # define MY_CXT_CLONE \
55 my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
56 Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
57 sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
60 # define VMG_THREADSAFE 0
62 # define dMY_CXT dNOOP
64 # define MY_CXT vmg_globaldata
66 # define START_MY_CXT STATIC my_cxt_t MY_CXT;
68 # define MY_CXT_INIT NOOP
70 # define MY_CXT_CLONE NOOP
75 STATIC SV *vmg_clone(pTHX_ SV *sv, tTHX owner) {
76 #define vmg_clone(P, O) vmg_clone(aTHX_ (P), (O))
78 param.stashes = NULL; /* don't need it unless sv is a PVHV */
80 param.proto_perl = owner;
81 return sv_dup(sv, ¶m);
84 #endif /* VMG_THREADSAFE */
86 /* --- Compatibility ------------------------------------------------------- */
89 # define Newx(v, n, c) New(0, v, n, c)
93 # define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
97 # define mPUSHi(I) PUSHs(sv_2mortal(newSViv(I)))
100 #ifndef PERL_MAGIC_ext
101 # define PERL_MAGIC_ext '~'
116 /* uvar magic and Hash::Util::FieldHash were commited with 28419 */
117 #if VMG_HAS_PERL_MAINT(5, 9, 4, 28419) || VMG_HAS_PERL(5, 10, 0)
123 /* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160 */
124 #if !defined(VMG_COMPAT_ARRAY_PUSH_NOLEN) && (VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0))
125 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
127 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
130 /* Applied to dev-5.11 as 34908 */
131 #if VMG_HAS_PERL_MAINT(5, 11, 0, 34908)
132 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
134 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
137 /* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
138 #if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
139 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
141 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
144 #if VMG_HAS_PERL_MAINT(5, 11, 0, 32969)
145 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
147 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
152 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html - but specialized to our needs. */
153 STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
154 #define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
156 sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
157 /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
159 if ((mg = SvMAGIC(sv))) {
162 const MGVTBL* const vtbl = mg->mg_virtual;
164 if (vtbl->svt_clear) {
169 } while ((mg = mg->mg_moremagic));
173 #endif /* VMG_UVAR */
175 /* --- Context-safe global data -------------------------------------------- */
177 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
179 typedef HV * my_cxt_t;
183 /* --- Signatures ---------------------------------------------------------- */
185 #define SIG_MIN ((U16) (1u << 8))
186 #define SIG_MAX ((U16) ((1u << 16) - 1))
187 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
188 #define SIG_WIZ ((U16) ((1u << 8) - 1))
190 /* ... Generate signatures ................................................. */
192 STATIC U16 vmg_gensig(pTHX) {
193 #define vmg_gensig() vmg_gensig(aTHX)
199 sig = SIG_NBR * Drand01() + SIG_MIN;
200 } while (hv_exists(MY_CXT, buf, sprintf(buf, "%u", sig)));
205 /* --- MGWIZ structure ----------------------------------------------------- */
212 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
215 #endif /* MGf_COPY */
221 #endif /* MGf_LOCAL */
223 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
224 #endif /* VMG_UVAR */
227 #endif /* VMG_MULTIPLICITY */
230 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
231 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
233 /* ... Construct private data .............................................. */
235 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
236 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
238 I32 i, alen = (args == NULL) ? 0 : av_len(args);
247 EXTEND(SP, alen + 1);
248 PUSHs(sv_2mortal(newRV_inc(sv)));
249 for (i = 0; i < alen; ++i)
250 PUSHs(*av_fetch(args, i, 0));
253 count = call_sv(ctor, G_SCALAR);
257 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
259 #if VMG_HAS_PERL(5, 8, 3)
260 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
262 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
273 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
274 MAGIC *mg, *moremagic;
276 if (SvTYPE(sv) >= SVt_PVMG) {
277 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
278 moremagic = mg->mg_moremagic;
279 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
281 if (mg) { return mg->mg_obj; }
287 /* ... Magic cast/dispell .................................................. */
290 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
292 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
294 prevmagic->mg_moremagic = moremagic;
296 SvMAGIC_set(sv, moremagic);
298 mg->mg_moremagic = NULL;
299 Safefree(mg->mg_ptr);
302 #endif /* VMG_UVAR */
304 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
305 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
306 MAGIC *mg = NULL, *moremagic = NULL;
312 if (SvTYPE(sv) >= SVt_PVMG) {
313 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
314 moremagic = mg->mg_moremagic;
315 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
317 if (mg) { return 1; }
320 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
321 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
322 mg->mg_private = w->sig;
325 mg->mg_flags |= MGf_COPY;
326 #endif /* MGf_COPY */
329 mg->mg_flags |= MGf_DUP;
333 mg->mg_flags |= MGf_LOCAL;
334 #endif /* MGf_LOCAL */
337 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
342 uf[0].uf_val = vmg_svt_val;
349 /* One uvar magic in the chain is enough. */
350 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
351 moremagic = mg->mg_moremagic;
352 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
355 if (mg) { /* Found another uvar magic. */
356 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
357 if (olduf->uf_val == vmg_svt_val) {
358 /* It's our uvar magic, nothing to do. */
361 /* It's another uvar magic, backup it and replace it by ours. */
363 vmg_uvar_del(sv, prevmagic, mg, moremagic);
368 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
372 #endif /* VMG_UVAR */
377 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
378 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
381 #endif /* VMG_UVAR */
382 MAGIC *mg, *prevmagic, *moremagic = NULL;
384 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
386 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
387 moremagic = mg->mg_moremagic;
388 if (mg->mg_type == PERL_MAGIC_ext) {
389 if (mg->mg_private == sig) {
391 /* If the current has no uvar, short-circuit uvar deletion. */
392 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
393 #endif /* VMG_UVAR */
396 } else if ((mg->mg_private >= SIG_MIN) &&
397 (mg->mg_private <= SIG_MAX) &&
398 SV2MGWIZ(mg->mg_ptr)->uvar) {
400 /* We can't break here since we need to find the ext magic to delete. */
401 #endif /* VMG_UVAR */
405 if (!mg) { return 0; }
408 prevmagic->mg_moremagic = moremagic;
410 SvMAGIC_set(sv, moremagic);
412 mg->mg_moremagic = NULL;
414 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
415 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
419 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
420 /* mg was the first ext magic in the chain that had uvar */
422 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
423 if ((mg->mg_type == PERL_MAGIC_ext) &&
424 (mg->mg_private >= SIG_MIN) &&
425 (mg->mg_private <= SIG_MAX) &&
426 SV2MGWIZ(mg->mg_ptr)->uvar) {
434 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
435 moremagic = mg->mg_moremagic;
436 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
439 uf = (struct ufuncs *) mg->mg_ptr;
440 /* assert(uf->uf_val == vmg_svt_val); */
441 if (uf[1].uf_val || uf[1].uf_set) {
442 /* Revert the original uvar magic. */
444 Renew(uf, 1, struct ufuncs);
445 mg->mg_ptr = (char *) uf;
446 mg->mg_len = sizeof(struct ufuncs);
448 /* Remove the uvar magic. */
449 vmg_uvar_del(sv, prevmagic, mg, moremagic);
453 #endif /* VMG_UVAR */
458 /* ... svt callbacks ....................................................... */
460 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
473 EXTEND(SP, args + 2);
474 PUSHs(sv_2mortal(newRV_inc(sv)));
475 PUSHs(data ? data : &PL_sv_undef);
477 for (i = 0; i < args; ++i) {
478 SV *sva = va_arg(ap, SV *);
479 PUSHs(sva ? sva : &PL_sv_undef);
484 count = call_sv(cb, G_SCALAR);
488 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
490 ret = SvOK(svr) ? SvIV(svr) : 0;
500 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
501 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
502 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
504 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
505 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
508 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
509 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
512 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
525 PUSHs(sv_2mortal(newRV_inc(sv)));
526 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
527 if (SvTYPE(sv) == SVt_PVAV) {
528 len = av_len((AV *) sv) + 1;
536 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
540 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
542 ret = SvOK(svr) ? SvUV(svr) : len;
552 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
553 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
556 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
557 /* So that it can survive tmp cleanup in vmg_cb_call */
559 #if !VMG_HAS_PERL_MAINT(5, 11, 0, 32686)
560 /* The previous magic tokens were freed but the magic chain wasn't updated, so
561 * if you access the sv from the callback the old deleted magics will trigger
562 * and cause memory misreads. Change 32686 solved it that way : */
565 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
566 * mg->mg_ptr reference count */
567 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
571 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
572 # if VMG_HAS_PERL_MAINT(5, 11, 0, 33256)
581 if (keylen == HEf_SVKEY) {
584 keysv = newSVpvn(key, keylen);
587 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
589 if (keylen != HEf_SVKEY) {
595 #endif /* MGf_COPY */
598 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
604 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
605 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
607 #endif /* MGf_LOCAL */
610 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
615 mg = mg_find(sv, PERL_MAGIC_uvar);
616 /* mg can't be NULL or we wouldn't be there. */
618 uf = (struct ufuncs *) mg->mg_ptr;
620 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
621 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
623 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
624 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
626 if ((mg->mg_type != PERL_MAGIC_ext)
627 || (mg->mg_private < SIG_MIN)
628 || (mg->mg_private > SIG_MAX)) { continue; }
629 w = SV2MGWIZ(mg->mg_ptr);
630 if (!w->uvar) { continue; }
633 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
635 case HV_FETCH_ISSTORE:
636 case HV_FETCH_LVALUE:
637 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
638 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
640 case HV_FETCH_ISEXISTS:
641 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
644 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
651 #endif /* VMG_UVAR */
653 /* ... Wizard destructor ................................................... */
655 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
659 if (PL_dirty) /* during global destruction, the context is already freed */
664 if (w->owner != aTHX)
667 #endif /* VMG_MULTIPLICITY */
671 if (hv_delete(MY_CXT, buf, sprintf(buf, "%u", w->sig), 0) != wiz)
674 SvFLAGS(wiz) |= SVf_BREAK;
677 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
678 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
679 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
680 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
681 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
682 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
684 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
685 #endif /* MGf_COPY */
687 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
690 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
691 #endif /* MGf_LOCAL */
693 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
694 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
695 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
696 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
697 #endif /* VMG_UVAR */
705 STATIC MGVTBL vmg_wizard_vtbl = {
710 vmg_wizard_free, /* free */
713 #endif /* MGf_COPY */
719 #endif /* MGf_LOCAL */
722 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
723 STATIC const char vmg_invalid_sv[] = "Invalid variable";
724 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
725 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
726 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
727 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
729 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
730 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
735 } else if (SvNOK(sv)) {
737 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
740 croak(vmg_invalid_sig);
742 if (sig < SIG_MIN) { sig += SIG_MIN; }
743 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
748 STATIC U16 vmg_wizard_sig(pTHX_ SV *wiz) {
749 #define vmg_wizard_sig(W) vmg_wizard_sig(aTHX_ (W))
754 sig = SV2MGWIZ(SvRV(wiz))->sig;
755 } else if (SvOK(wiz)) {
756 sig = vmg_sv2sig(wiz);
758 croak(vmg_invalid_wiz);
763 if (!hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))
769 STATIC SV *vmg_wizard_wiz(pTHX_ SV *wiz) {
770 #define vmg_wizard_wiz(W) vmg_wizard_wiz(aTHX_ (W))
778 if (SV2MGWIZ(wiz)->owner == aTHX)
780 #endif /* VMG_MULTIPLICITY */
781 sig = SV2MGWIZ(wiz)->sig;
782 } else if (SvOK(wiz)) {
783 sig = vmg_sv2sig(wiz);
785 croak(vmg_invalid_wiz);
790 return (old = hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))
795 #define VMG_SET_CB(S, N) \
797 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
799 #define VMG_SET_SVT_CB(S, N) \
801 if (SvOK(cb) && SvROK(cb)) { \
802 t->svt_ ## N = vmg_svt_ ## N; \
803 w->cb_ ## N = newRV_inc(SvRV(cb)); \
805 t->svt_ ## N = NULL; \
806 w->cb_ ## N = NULL; \
811 #define VMG_CLONE_CB(N) \
812 z->cb_ ## N = (w->cb_ ## N) ? newRV_noinc(vmg_clone(SvRV(w->cb_ ## N), \
816 STATIC MGWIZ *vmg_wizard_clone(pTHX_ const MGWIZ *w) {
817 #define vmg_wizard_clone(W) vmg_wizard_clone(aTHX_ (W))
822 Copy(w->vtbl, t, 1, MGVTBL);
833 #endif /* MGf_COPY */
839 #endif /* MGf_LOCAL */
843 VMG_CLONE_CB(exists);
844 VMG_CLONE_CB(delete);
845 #endif /* VMG_UVAR */
854 #endif /* VMG_THREADSAFE */
856 /* --- XS ------------------------------------------------------------------ */
858 MODULE = Variable::Magic PACKAGE = Variable::Magic
867 hv_iterinit(MY_CXT); /* Allocate iterator */
868 stash = gv_stashpv(__PACKAGE__, 1);
869 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
870 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
871 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
872 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
873 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
874 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
875 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
876 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
877 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
878 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID",
879 newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID));
880 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
881 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
882 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
883 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
884 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
885 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
899 hv_iterinit(hv); /* Allocate iterator */
901 while ((key = hv_iternext(MY_CXT))) {
903 char *sig = HePV(key, len);
906 sv = MGWIZ2SV(vmg_wizard_clone(SV2MGWIZ(HeVAL(key))));
907 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
908 mg->mg_private = SIG_WIZ;
910 hv_store(hv, sig, len, sv, HeHASH(key));
917 #endif /* VMG_THREADSAFE */
937 #endif /* MGf_COPY */
943 #endif /* MGf_LOCAL */
946 #endif /* VMG_UVAR */
947 ) { croak(vmg_wrongargnum); }
952 sig = vmg_sv2sig(svsig);
953 if ((old = hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))) {
954 ST(0) = sv_2mortal(newRV_inc(*old));
958 if (HvKEYS(MY_CXT) >= SIG_NBR) { croak(vmg_toomanysigs); }
965 VMG_SET_CB(ST(i++), data);
966 VMG_SET_SVT_CB(ST(i++), get);
967 VMG_SET_SVT_CB(ST(i++), set);
968 VMG_SET_SVT_CB(ST(i++), len);
969 VMG_SET_SVT_CB(ST(i++), clear);
970 VMG_SET_SVT_CB(ST(i++), free);
972 VMG_SET_SVT_CB(ST(i++), copy);
973 #endif /* MGf_COPY */
975 /* VMG_SET_SVT_CB(ST(i++), dup); */
981 VMG_SET_SVT_CB(ST(i++), local);
982 #endif /* MGf_LOCAL */
984 VMG_SET_CB(ST(i++), fetch);
985 VMG_SET_CB(ST(i++), store);
986 VMG_SET_CB(ST(i++), exists);
987 VMG_SET_CB(ST(i++), delete);
988 #endif /* VMG_UVAR */
991 #endif /* VMG_MULTIPLICITY */
996 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
997 #endif /* VMG_UVAR */
1000 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
1001 mg->mg_private = SIG_WIZ;
1004 hv_store(MY_CXT, buf, sprintf(buf, "%u", sig), sv, 0);
1006 RETVAL = newRV_noinc(sv);
1014 if (HvKEYS(MY_CXT) >= SIG_NBR) { croak(vmg_toomanysigs); }
1015 RETVAL = newSVuv(vmg_gensig());
1022 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
1023 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
1027 SV *cast(SV *sv, SV *wiz, ...)
1028 PROTOTYPE: \[$@%&*]$@
1033 wiz = vmg_wizard_wiz(wiz);
1039 av_fill(args, items - 2);
1040 for (i = 2; i < items; ++i) {
1043 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
1046 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
1052 SV *getdata(SV *sv, SV *wiz)
1053 PROTOTYPE: \[$@%&*]$
1058 sig = vmg_wizard_sig(wiz);
1061 data = vmg_data_get(SvRV(sv), sig);
1062 if (!data) { XSRETURN_UNDEF; }
1066 SV *dispell(SV *sv, SV *wiz)
1067 PROTOTYPE: \[$@%&*]$
1071 sig = vmg_wizard_sig(wiz);
1074 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));