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 p28419 */
117 #if VMG_HAS_PERL_MAINT(5, 9, 4, 28419) || VMG_HAS_PERL(5, 10, 0)
123 #if !defined(VMG_COMPAT_ARRAY_PUSH_NOLEN) && (VMG_HAS_PERL_BRANCH(5, 8, 9) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0))
124 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
126 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
129 /* since 5.9.5 - see #43357 */
130 #if VMG_HAS_PERL_BRANCH(5, 8, 9) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
131 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
133 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
136 #if VMG_HAS_PERL_MAINT(5, 11, 0, 32969)
137 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
139 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
144 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html - but specialized to our needs. */
145 STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
146 #define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
148 sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
149 /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
151 if ((mg = SvMAGIC(sv))) {
154 const MGVTBL* const vtbl = mg->mg_virtual;
156 if (vtbl->svt_clear) {
161 } while ((mg = mg->mg_moremagic));
165 #endif /* VMG_UVAR */
167 /* --- Context-safe global data -------------------------------------------- */
169 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
171 typedef HV * my_cxt_t;
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, 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 #endif /* VMG_MULTIPLICITY */
222 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
223 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
225 /* ... Construct private data .............................................. */
227 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
228 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
230 I32 i, alen = (args == NULL) ? 0 : av_len(args);
239 EXTEND(SP, alen + 1);
240 PUSHs(sv_2mortal(newRV_inc(sv)));
241 for (i = 0; i < alen; ++i)
242 PUSHs(*av_fetch(args, i, 0));
245 count = call_sv(ctor, G_SCALAR);
249 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
251 #if VMG_HAS_PERL(5, 8, 3)
252 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
254 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
265 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
266 MAGIC *mg, *moremagic;
268 if (SvTYPE(sv) >= SVt_PVMG) {
269 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
270 moremagic = mg->mg_moremagic;
271 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
273 if (mg) { return mg->mg_obj; }
279 /* ... Magic cast/dispell .................................................. */
282 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
284 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
286 prevmagic->mg_moremagic = moremagic;
288 SvMAGIC_set(sv, moremagic);
290 mg->mg_moremagic = NULL;
291 Safefree(mg->mg_ptr);
294 #endif /* VMG_UVAR */
296 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
297 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
298 MAGIC *mg = NULL, *moremagic = NULL;
304 if (SvTYPE(sv) >= SVt_PVMG) {
305 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
306 moremagic = mg->mg_moremagic;
307 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
309 if (mg) { return 1; }
312 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
313 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
314 mg->mg_private = w->sig;
317 mg->mg_flags |= MGf_COPY;
318 #endif /* MGf_COPY */
321 mg->mg_flags |= MGf_DUP;
325 mg->mg_flags |= MGf_LOCAL;
326 #endif /* MGf_LOCAL */
329 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
334 uf[0].uf_val = vmg_svt_val;
341 /* One uvar magic in the chain is enough. */
342 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
343 moremagic = mg->mg_moremagic;
344 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
347 if (mg) { /* Found another uvar magic. */
348 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
349 if (olduf->uf_val == vmg_svt_val) {
350 /* It's our uvar magic, nothing to do. */
353 /* It's another uvar magic, backup it and replace it by ours. */
355 vmg_uvar_del(sv, prevmagic, mg, moremagic);
360 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
364 #endif /* VMG_UVAR */
369 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
370 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
373 #endif /* VMG_UVAR */
374 MAGIC *mg, *prevmagic, *moremagic = NULL;
376 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
378 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
379 moremagic = mg->mg_moremagic;
380 if (mg->mg_type == PERL_MAGIC_ext) {
381 if (mg->mg_private == sig) {
383 /* If the current has no uvar, short-circuit uvar deletion. */
384 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
385 #endif /* VMG_UVAR */
388 } else if ((mg->mg_private >= SIG_MIN) &&
389 (mg->mg_private <= SIG_MAX) &&
390 SV2MGWIZ(mg->mg_ptr)->uvar) {
392 /* We can't break here since we need to find the ext magic to delete. */
393 #endif /* VMG_UVAR */
397 if (!mg) { return 0; }
400 prevmagic->mg_moremagic = moremagic;
402 SvMAGIC_set(sv, moremagic);
404 mg->mg_moremagic = NULL;
406 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
407 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
411 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
412 /* mg was the first ext magic in the chain that had uvar */
414 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
415 if ((mg->mg_type == PERL_MAGIC_ext) &&
416 (mg->mg_private >= SIG_MIN) &&
417 (mg->mg_private <= SIG_MAX) &&
418 SV2MGWIZ(mg->mg_ptr)->uvar) {
426 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
427 moremagic = mg->mg_moremagic;
428 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
431 uf = (struct ufuncs *) mg->mg_ptr;
432 /* assert(uf->uf_val == vmg_svt_val); */
433 if (uf[1].uf_val || uf[1].uf_set) {
434 /* Revert the original uvar magic. */
436 Renew(uf, 1, struct ufuncs);
437 mg->mg_ptr = (char *) uf;
438 mg->mg_len = sizeof(struct ufuncs);
440 /* Remove the uvar magic. */
441 vmg_uvar_del(sv, prevmagic, mg, moremagic);
445 #endif /* VMG_UVAR */
450 /* ... svt callbacks ....................................................... */
452 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
465 EXTEND(SP, args + 2);
466 PUSHs(sv_2mortal(newRV_inc(sv)));
467 PUSHs(data ? data : &PL_sv_undef);
469 for (i = 0; i < args; ++i) {
470 SV *sva = va_arg(ap, SV *);
471 PUSHs(sva ? sva : &PL_sv_undef);
476 count = call_sv(cb, G_SCALAR);
480 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
482 ret = SvOK(svr) ? SvIV(svr) : 0;
492 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
493 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
494 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
496 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
497 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
500 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
501 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
504 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
517 PUSHs(sv_2mortal(newRV_inc(sv)));
518 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
519 if (SvTYPE(sv) == SVt_PVAV) {
520 len = av_len((AV *) sv) + 1;
528 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
532 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
534 ret = SvOK(svr) ? SvUV(svr) : len;
544 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
545 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
548 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
549 /* So that it can survive tmp cleanup in vmg_cb_call */
551 #if !VMG_HAS_PERL_MAINT(5, 11, 0, 32686)
552 /* The previous magic tokens were freed but the magic chain wasn't updated, so
553 * if you access the sv from the callback the old deleted magics will trigger
554 * and cause memory misreads. Change 32686 solved it that way : */
557 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
558 * mg->mg_ptr reference count */
559 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
563 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
564 # if VMG_HAS_PERL_MAINT(5, 11, 0, 33256)
573 if (keylen == HEf_SVKEY) {
576 keysv = newSVpvn(key, keylen);
579 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
581 if (keylen != HEf_SVKEY) {
587 #endif /* MGf_COPY */
590 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
596 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
597 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
599 #endif /* MGf_LOCAL */
602 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
607 mg = mg_find(sv, PERL_MAGIC_uvar);
608 /* mg can't be NULL or we wouldn't be there. */
610 uf = (struct ufuncs *) mg->mg_ptr;
612 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
613 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
615 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
616 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
618 if ((mg->mg_type != PERL_MAGIC_ext)
619 || (mg->mg_private < SIG_MIN)
620 || (mg->mg_private > SIG_MAX)) { continue; }
621 w = SV2MGWIZ(mg->mg_ptr);
622 if (!w->uvar) { continue; }
625 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
627 case HV_FETCH_ISSTORE:
628 case HV_FETCH_LVALUE:
629 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
630 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
632 case HV_FETCH_ISEXISTS:
633 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
636 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
643 #endif /* VMG_UVAR */
645 /* ... Wizard destructor ................................................... */
647 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
651 if (PL_dirty) /* during global destruction, the context is already freed */
656 if (w->owner != aTHX)
659 #endif /* VMG_MULTIPLICITY */
663 if (hv_delete(MY_CXT, buf, sprintf(buf, "%u", w->sig), 0) != wiz)
666 SvFLAGS(wiz) |= SVf_BREAK;
669 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
670 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
671 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
672 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
673 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
674 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
676 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
677 #endif /* MGf_COPY */
679 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
682 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
683 #endif /* MGf_LOCAL */
685 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
686 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
687 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
688 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
689 #endif /* VMG_UVAR */
697 STATIC MGVTBL vmg_wizard_vtbl = {
702 vmg_wizard_free, /* free */
705 #endif /* MGf_COPY */
711 #endif /* MGf_LOCAL */
714 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
715 STATIC const char vmg_invalid_sv[] = "Invalid variable";
716 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
717 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
718 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
719 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
721 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
722 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
727 } else if (SvNOK(sv)) {
729 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
732 croak(vmg_invalid_sig);
734 if (sig < SIG_MIN) { sig += SIG_MIN; }
735 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
740 STATIC U16 vmg_wizard_sig(pTHX_ SV *wiz) {
741 #define vmg_wizard_sig(W) vmg_wizard_sig(aTHX_ (W))
746 sig = SV2MGWIZ(SvRV(wiz))->sig;
747 } else if (SvOK(wiz)) {
748 sig = vmg_sv2sig(wiz);
750 croak(vmg_invalid_wiz);
755 if (!hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))
761 STATIC SV *vmg_wizard_wiz(pTHX_ SV *wiz) {
762 #define vmg_wizard_wiz(W) vmg_wizard_wiz(aTHX_ (W))
770 if (SV2MGWIZ(wiz)->owner == aTHX)
772 #endif /* VMG_MULTIPLICITY */
773 sig = SV2MGWIZ(wiz)->sig;
774 } else if (SvOK(wiz)) {
775 sig = vmg_sv2sig(wiz);
777 croak(vmg_invalid_wiz);
782 return (old = hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))
787 #define VMG_SET_CB(S, N) \
789 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
791 #define VMG_SET_SVT_CB(S, N) \
793 if (SvOK(cb) && SvROK(cb)) { \
794 t->svt_ ## N = vmg_svt_ ## N; \
795 w->cb_ ## N = newRV_inc(SvRV(cb)); \
797 t->svt_ ## N = NULL; \
798 w->cb_ ## N = NULL; \
803 #define VMG_CLONE_CB(N) \
804 z->cb_ ## N = (w->cb_ ## N) ? newRV_noinc(vmg_clone(SvRV(w->cb_ ## N), \
808 STATIC MGWIZ *vmg_wizard_clone(pTHX_ const MGWIZ *w) {
809 #define vmg_wizard_clone(W) vmg_wizard_clone(aTHX_ (W))
814 Copy(w->vtbl, t, 1, MGVTBL);
825 #endif /* MGf_COPY */
831 #endif /* MGf_LOCAL */
835 VMG_CLONE_CB(exists);
836 VMG_CLONE_CB(delete);
837 #endif /* VMG_UVAR */
846 #endif /* VMG_THREADSAFE */
848 /* --- XS ------------------------------------------------------------------ */
850 MODULE = Variable::Magic PACKAGE = Variable::Magic
859 hv_iterinit(MY_CXT); /* Allocate iterator */
860 stash = gv_stashpv(__PACKAGE__, 1);
861 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
862 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
863 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
864 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
865 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
866 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
867 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
868 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
869 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
870 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
871 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
872 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
873 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
874 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
875 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
889 hv_iterinit(hv); /* Allocate iterator */
891 while ((key = hv_iternext(MY_CXT))) {
893 char *sig = HePV(key, len);
896 sv = MGWIZ2SV(vmg_wizard_clone(SV2MGWIZ(HeVAL(key))));
897 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
898 mg->mg_private = SIG_WIZ;
900 hv_store(hv, sig, len, sv, HeHASH(key));
907 #endif /* VMG_THREADSAFE */
927 #endif /* MGf_COPY */
933 #endif /* MGf_LOCAL */
936 #endif /* VMG_UVAR */
937 ) { croak(vmg_wrongargnum); }
942 sig = vmg_sv2sig(svsig);
943 if ((old = hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))) {
944 ST(0) = sv_2mortal(newRV_inc(*old));
948 if (HvKEYS(MY_CXT) >= SIG_NBR) { croak(vmg_toomanysigs); }
955 VMG_SET_CB(ST(i++), data);
956 VMG_SET_SVT_CB(ST(i++), get);
957 VMG_SET_SVT_CB(ST(i++), set);
958 VMG_SET_SVT_CB(ST(i++), len);
959 VMG_SET_SVT_CB(ST(i++), clear);
960 VMG_SET_SVT_CB(ST(i++), free);
962 VMG_SET_SVT_CB(ST(i++), copy);
963 #endif /* MGf_COPY */
965 /* VMG_SET_SVT_CB(ST(i++), dup); */
971 VMG_SET_SVT_CB(ST(i++), local);
972 #endif /* MGf_LOCAL */
974 VMG_SET_CB(ST(i++), fetch);
975 VMG_SET_CB(ST(i++), store);
976 VMG_SET_CB(ST(i++), exists);
977 VMG_SET_CB(ST(i++), delete);
978 #endif /* VMG_UVAR */
981 #endif /* VMG_MULTIPLICITY */
986 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
987 #endif /* VMG_UVAR */
990 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
991 mg->mg_private = SIG_WIZ;
994 hv_store(MY_CXT, buf, sprintf(buf, "%u", sig), sv, 0);
996 RETVAL = newRV_noinc(sv);
1004 if (HvKEYS(MY_CXT) >= SIG_NBR) { croak(vmg_toomanysigs); }
1005 RETVAL = newSVuv(vmg_gensig());
1012 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
1013 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
1017 SV *cast(SV *sv, SV *wiz, ...)
1018 PROTOTYPE: \[$@%&*]$@
1023 wiz = vmg_wizard_wiz(wiz);
1029 av_fill(args, items - 2);
1030 for (i = 2; i < items; ++i) {
1033 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
1036 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
1042 SV *getdata(SV *sv, SV *wiz)
1043 PROTOTYPE: \[$@%&*]$
1048 sig = vmg_wizard_sig(wiz);
1051 data = vmg_data_get(SvRV(sv), sig);
1052 if (!data) { XSRETURN_UNDEF; }
1056 SV *dispell(SV *sv, SV *wiz)
1057 PROTOTYPE: \[$@%&*]$
1061 sig = vmg_wizard_sig(wiz);
1064 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));