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 #ifndef IN_PERL_COMPILETIME
117 # define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
120 /* uvar magic and Hash::Util::FieldHash were commited with 28419 */
121 #if VMG_HAS_PERL_MAINT(5, 9, 4, 28419) || VMG_HAS_PERL(5, 10, 0)
127 /* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160 */
128 #ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
129 # if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0)
130 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
132 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
136 /* Applied to dev-5.11 as 34908 */
137 #if VMG_HAS_PERL_MAINT(5, 11, 0, 34908)
138 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
140 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
143 /* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
144 #if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
145 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
147 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
150 #if VMG_HAS_PERL_MAINT(5, 11, 0, 32969)
151 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
153 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
158 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html - but specialized to our needs. */
159 STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
160 #define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
162 sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
163 /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
164 if ((mg = SvMAGIC(sv))) {
167 const MGVTBL* const vtbl = mg->mg_virtual;
169 if (vtbl->svt_clear) {
174 } while ((mg = mg->mg_moremagic));
178 #endif /* VMG_UVAR */
180 /* --- Context-safe global data -------------------------------------------- */
182 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
184 typedef HV * my_cxt_t;
188 /* --- Signatures ---------------------------------------------------------- */
190 #define SIG_MIN ((U16) (1u << 8))
191 #define SIG_MAX ((U16) ((1u << 16) - 1))
192 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
193 #define SIG_WIZ ((U16) ((1u << 8) - 1))
195 /* ... Generate signatures ................................................. */
197 STATIC U16 vmg_gensig(pTHX) {
198 #define vmg_gensig() vmg_gensig(aTHX)
204 sig = SIG_NBR * Drand01() + SIG_MIN;
205 } while (hv_exists(MY_CXT, buf, sprintf(buf, "%u", sig)));
210 /* --- MGWIZ structure ----------------------------------------------------- */
217 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
220 #endif /* MGf_COPY */
226 #endif /* MGf_LOCAL */
228 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
229 #endif /* VMG_UVAR */
232 #endif /* VMG_MULTIPLICITY */
235 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
236 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
238 /* ... Construct private data .............................................. */
240 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
241 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
243 I32 i, alen = (args == NULL) ? 0 : av_len(args);
244 I32 flags = G_SCALAR;
253 EXTEND(SP, alen + 1);
254 PUSHs(sv_2mortal(newRV_inc(sv)));
255 for (i = 0; i < alen; ++i)
256 PUSHs(*av_fetch(args, i, 0));
259 if (IN_PERL_COMPILETIME)
260 flags |= G_EVAL | G_KEEPERR;
262 count = call_sv(ctor, flags);
266 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
268 #if VMG_HAS_PERL(5, 8, 3)
269 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
271 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
282 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
283 MAGIC *mg, *moremagic;
285 if (SvTYPE(sv) >= SVt_PVMG) {
286 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
287 moremagic = mg->mg_moremagic;
288 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
290 if (mg) { return mg->mg_obj; }
296 /* ... Magic cast/dispell .................................................. */
299 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
301 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
303 prevmagic->mg_moremagic = moremagic;
305 SvMAGIC_set(sv, moremagic);
307 mg->mg_moremagic = NULL;
308 Safefree(mg->mg_ptr);
311 #endif /* VMG_UVAR */
313 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
314 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
315 MAGIC *mg = NULL, *moremagic = NULL;
321 if (SvTYPE(sv) >= SVt_PVMG) {
322 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
323 moremagic = mg->mg_moremagic;
324 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
326 if (mg) { return 1; }
329 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
330 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
331 mg->mg_private = w->sig;
334 mg->mg_flags |= MGf_COPY;
335 #endif /* MGf_COPY */
338 mg->mg_flags |= MGf_DUP;
342 mg->mg_flags |= MGf_LOCAL;
343 #endif /* MGf_LOCAL */
346 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
351 uf[0].uf_val = vmg_svt_val;
358 /* One uvar magic in the chain is enough. */
359 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
360 moremagic = mg->mg_moremagic;
361 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
364 if (mg) { /* Found another uvar magic. */
365 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
366 if (olduf->uf_val == vmg_svt_val) {
367 /* It's our uvar magic, nothing to do. */
370 /* It's another uvar magic, backup it and replace it by ours. */
372 vmg_uvar_del(sv, prevmagic, mg, moremagic);
377 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
381 #endif /* VMG_UVAR */
386 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
387 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
390 #endif /* VMG_UVAR */
391 MAGIC *mg, *prevmagic, *moremagic = NULL;
393 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
395 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
396 moremagic = mg->mg_moremagic;
397 if (mg->mg_type == PERL_MAGIC_ext) {
398 if (mg->mg_private == sig) {
400 /* If the current has no uvar, short-circuit uvar deletion. */
401 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
402 #endif /* VMG_UVAR */
405 } else if ((mg->mg_private >= SIG_MIN) &&
406 (mg->mg_private <= SIG_MAX) &&
407 SV2MGWIZ(mg->mg_ptr)->uvar) {
409 /* We can't break here since we need to find the ext magic to delete. */
410 #endif /* VMG_UVAR */
414 if (!mg) { return 0; }
417 prevmagic->mg_moremagic = moremagic;
419 SvMAGIC_set(sv, moremagic);
421 mg->mg_moremagic = NULL;
423 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
424 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
428 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
429 /* mg was the first ext magic in the chain that had uvar */
431 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
432 if ((mg->mg_type == PERL_MAGIC_ext) &&
433 (mg->mg_private >= SIG_MIN) &&
434 (mg->mg_private <= SIG_MAX) &&
435 SV2MGWIZ(mg->mg_ptr)->uvar) {
443 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
444 moremagic = mg->mg_moremagic;
445 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
448 uf = (struct ufuncs *) mg->mg_ptr;
449 /* assert(uf->uf_val == vmg_svt_val); */
450 if (uf[1].uf_val || uf[1].uf_set) {
451 /* Revert the original uvar magic. */
453 Renew(uf, 1, struct ufuncs);
454 mg->mg_ptr = (char *) uf;
455 mg->mg_len = sizeof(struct ufuncs);
457 /* Remove the uvar magic. */
458 vmg_uvar_del(sv, prevmagic, mg, moremagic);
462 #endif /* VMG_UVAR */
467 /* ... svt callbacks ....................................................... */
469 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
474 I32 flags = G_SCALAR;
483 EXTEND(SP, args + 2);
484 PUSHs(sv_2mortal(newRV_inc(sv)));
485 PUSHs(data ? data : &PL_sv_undef);
487 for (i = 0; i < args; ++i) {
488 SV *sva = va_arg(ap, SV *);
489 PUSHs(sva ? sva : &PL_sv_undef);
494 if (IN_PERL_COMPILETIME)
495 flags |= G_EVAL | G_KEEPERR;
497 count = call_sv(cb, flags);
501 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
503 ret = SvOK(svr) ? SvIV(svr) : 0;
513 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
514 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
515 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
517 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
518 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
521 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
522 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
525 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
529 I32 flags = G_SCALAR;
534 has_array = SvTYPE(sv) == SVt_PVAV;
541 PUSHs(sv_2mortal(newRV_inc(sv)));
542 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
544 len = av_len((AV *) sv) + 1;
552 if (IN_PERL_COMPILETIME)
553 flags |= G_EVAL | G_KEEPERR;
555 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, flags);
559 if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
561 ret = SvOK(svr) ? SvUV(svr) : len;
568 return has_array ? ret - 1 : ret;
571 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
572 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
575 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
576 /* So that it can survive tmp cleanup in vmg_cb_call */
578 #if !VMG_HAS_PERL_MAINT(5, 11, 0, 32686)
579 /* The previous magic tokens were freed but the magic chain wasn't updated, so
580 * if you access the sv from the callback the old deleted magics will trigger
581 * and cause memory misreads. Change 32686 solved it that way : */
584 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
585 * mg->mg_ptr reference count */
586 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
590 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
591 # if VMG_HAS_PERL_MAINT(5, 11, 0, 33256)
600 if (keylen == HEf_SVKEY) {
603 keysv = newSVpvn(key, keylen);
606 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
608 if (keylen != HEf_SVKEY) {
614 #endif /* MGf_COPY */
617 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
623 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
624 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
626 #endif /* MGf_LOCAL */
629 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
634 mg = mg_find(sv, PERL_MAGIC_uvar);
635 /* mg can't be NULL or we wouldn't be there. */
637 uf = (struct ufuncs *) mg->mg_ptr;
639 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
640 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
642 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
643 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
645 if ((mg->mg_type != PERL_MAGIC_ext)
646 || (mg->mg_private < SIG_MIN)
647 || (mg->mg_private > SIG_MAX)) { continue; }
648 w = SV2MGWIZ(mg->mg_ptr);
649 if (!w->uvar) { continue; }
652 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
654 case HV_FETCH_ISSTORE:
655 case HV_FETCH_LVALUE:
656 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
657 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
659 case HV_FETCH_ISEXISTS:
660 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
663 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
670 #endif /* VMG_UVAR */
672 /* ... Wizard destructor ................................................... */
674 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
678 if (PL_dirty) /* during global destruction, the context is already freed */
683 if (w->owner != aTHX)
686 #endif /* VMG_MULTIPLICITY */
690 if (hv_delete(MY_CXT, buf, sprintf(buf, "%u", w->sig), 0) != wiz)
693 SvFLAGS(wiz) |= SVf_BREAK;
696 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
697 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
698 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
699 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
700 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
701 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
703 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
704 #endif /* MGf_COPY */
706 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
709 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
710 #endif /* MGf_LOCAL */
712 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
713 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
714 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
715 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
716 #endif /* VMG_UVAR */
724 STATIC MGVTBL vmg_wizard_vtbl = {
729 vmg_wizard_free, /* free */
732 #endif /* MGf_COPY */
738 #endif /* MGf_LOCAL */
741 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
742 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
743 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
744 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
745 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
747 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
748 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
753 } else if (SvNOK(sv)) {
755 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
758 croak(vmg_invalid_sig);
760 if (sig < SIG_MIN) { sig += SIG_MIN; }
761 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
766 STATIC U16 vmg_wizard_sig(pTHX_ SV *wiz) {
767 #define vmg_wizard_sig(W) vmg_wizard_sig(aTHX_ (W))
772 sig = SV2MGWIZ(SvRV(wiz))->sig;
773 } else if (SvOK(wiz)) {
774 sig = vmg_sv2sig(wiz);
776 croak(vmg_invalid_wiz);
781 if (!hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))
787 STATIC SV *vmg_wizard_wiz(pTHX_ SV *wiz) {
788 #define vmg_wizard_wiz(W) vmg_wizard_wiz(aTHX_ (W))
796 if (SV2MGWIZ(wiz)->owner == aTHX)
798 #endif /* VMG_MULTIPLICITY */
799 sig = SV2MGWIZ(wiz)->sig;
800 } else if (SvOK(wiz)) {
801 sig = vmg_sv2sig(wiz);
803 croak(vmg_invalid_wiz);
808 return (old = hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))
813 #define VMG_SET_CB(S, N) \
815 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
817 #define VMG_SET_SVT_CB(S, N) \
819 if (SvOK(cb) && SvROK(cb)) { \
820 t->svt_ ## N = vmg_svt_ ## N; \
821 w->cb_ ## N = newRV_inc(SvRV(cb)); \
823 t->svt_ ## N = NULL; \
824 w->cb_ ## N = NULL; \
829 #define VMG_CLONE_CB(N) \
830 z->cb_ ## N = (w->cb_ ## N) ? newRV_inc(vmg_clone(SvRV(w->cb_ ## N), \
834 STATIC MGWIZ *vmg_wizard_clone(pTHX_ const MGWIZ *w) {
835 #define vmg_wizard_clone(W) vmg_wizard_clone(aTHX_ (W))
840 Copy(w->vtbl, t, 1, MGVTBL);
851 #endif /* MGf_COPY */
857 #endif /* MGf_LOCAL */
861 VMG_CLONE_CB(exists);
862 VMG_CLONE_CB(delete);
863 #endif /* VMG_UVAR */
872 #endif /* VMG_THREADSAFE */
874 /* --- XS ------------------------------------------------------------------ */
876 MODULE = Variable::Magic PACKAGE = Variable::Magic
885 hv_iterinit(MY_CXT); /* Allocate iterator */
886 stash = gv_stashpv(__PACKAGE__, 1);
887 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
888 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
889 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
890 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
891 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
892 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
893 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
894 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
895 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
896 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID",
897 newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID));
898 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
899 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
900 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
901 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
902 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
903 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
917 hv_iterinit(hv); /* Allocate iterator */
919 while ((key = hv_iternext(MY_CXT))) {
921 char *sig = HePV(key, len);
924 sv = MGWIZ2SV(vmg_wizard_clone(SV2MGWIZ(HeVAL(key))));
925 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
926 mg->mg_private = SIG_WIZ;
928 hv_store(hv, sig, len, sv, HeHASH(key));
935 #endif /* VMG_THREADSAFE */
955 #endif /* MGf_COPY */
961 #endif /* MGf_LOCAL */
964 #endif /* VMG_UVAR */
965 ) { croak(vmg_wrongargnum); }
970 sig = vmg_sv2sig(svsig);
971 if ((old = hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))) {
972 ST(0) = sv_2mortal(newRV_inc(*old));
976 if (HvKEYS(MY_CXT) >= SIG_NBR) { croak(vmg_toomanysigs); }
983 VMG_SET_CB(ST(i++), data);
984 VMG_SET_SVT_CB(ST(i++), get);
985 VMG_SET_SVT_CB(ST(i++), set);
986 VMG_SET_SVT_CB(ST(i++), len);
987 VMG_SET_SVT_CB(ST(i++), clear);
988 VMG_SET_SVT_CB(ST(i++), free);
990 VMG_SET_SVT_CB(ST(i++), copy);
991 #endif /* MGf_COPY */
993 /* VMG_SET_SVT_CB(ST(i++), dup); */
999 VMG_SET_SVT_CB(ST(i++), local);
1000 #endif /* MGf_LOCAL */
1002 VMG_SET_CB(ST(i++), fetch);
1003 VMG_SET_CB(ST(i++), store);
1004 VMG_SET_CB(ST(i++), exists);
1005 VMG_SET_CB(ST(i++), delete);
1006 #endif /* VMG_UVAR */
1007 #if VMG_MULTIPLICITY
1009 #endif /* VMG_MULTIPLICITY */
1014 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
1015 #endif /* VMG_UVAR */
1018 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
1019 mg->mg_private = SIG_WIZ;
1022 hv_store(MY_CXT, buf, sprintf(buf, "%u", sig), sv, 0);
1024 RETVAL = newRV_noinc(sv);
1032 if (HvKEYS(MY_CXT) >= SIG_NBR) { croak(vmg_toomanysigs); }
1033 RETVAL = newSVuv(vmg_gensig());
1040 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
1041 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
1045 SV *cast(SV *sv, SV *wiz, ...)
1046 PROTOTYPE: \[$@%&*]$@
1051 wiz = vmg_wizard_wiz(wiz);
1057 av_fill(args, items - 2);
1058 for (i = 2; i < items; ++i) {
1061 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
1064 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
1070 SV *getdata(SV *sv, SV *wiz)
1071 PROTOTYPE: \[$@%&*]$
1076 sig = vmg_wizard_sig(wiz);
1079 data = vmg_data_get(SvRV(sv), sig);
1080 if (!data) { XSRETURN_UNDEF; }
1084 SV *dispell(SV *sv, SV *wiz)
1085 PROTOTYPE: \[$@%&*]$
1089 sig = vmg_wizard_sig(wiz);
1092 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));