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 #if VMG_HAS_PERL(5, 10, 0) || defined(PL_parser)
121 # ifndef PL_error_count
122 # define PL_error_count PL_parser->error_count
125 # ifndef PL_error_count
126 # define PL_error_count PL_Ierror_count
130 /* uvar magic and Hash::Util::FieldHash were commited with 28419 */
131 #if VMG_HAS_PERL_MAINT(5, 9, 4, 28419) || VMG_HAS_PERL(5, 10, 0)
137 /* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160 */
138 #ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
139 # if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0)
140 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
142 # define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
146 /* Applied to dev-5.11 as 34908 */
147 #if VMG_HAS_PERL_MAINT(5, 11, 0, 34908)
148 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
150 # define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
153 /* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
154 #if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
155 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
157 # define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
160 #if VMG_HAS_PERL_MAINT(5, 11, 0, 32969)
161 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
163 # define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
168 /* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html - but specialized to our needs. */
169 STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
170 #define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
172 sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
173 /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
174 if ((mg = SvMAGIC(sv))) {
177 const MGVTBL* const vtbl = mg->mg_virtual;
179 if (vtbl->svt_clear) {
184 } while ((mg = mg->mg_moremagic));
188 #endif /* VMG_UVAR */
190 /* --- Context-safe global data -------------------------------------------- */
192 #define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
194 typedef HV * my_cxt_t;
198 /* --- Signatures ---------------------------------------------------------- */
200 #define SIG_MIN ((U16) (1u << 8))
201 #define SIG_MAX ((U16) ((1u << 16) - 1))
202 #define SIG_NBR (SIG_MAX - SIG_MIN + 1)
203 #define SIG_WIZ ((U16) ((1u << 8) - 1))
205 /* ... Generate signatures ................................................. */
207 STATIC U16 vmg_gensig(pTHX) {
208 #define vmg_gensig() vmg_gensig(aTHX)
214 sig = SIG_NBR * Drand01() + SIG_MIN;
215 } while (hv_exists(MY_CXT, buf, sprintf(buf, "%u", sig)));
220 /* --- MGWIZ structure ----------------------------------------------------- */
227 SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
230 #endif /* MGf_COPY */
236 #endif /* MGf_LOCAL */
238 SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
239 #endif /* VMG_UVAR */
242 #endif /* VMG_MULTIPLICITY */
245 #define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
246 #define SV2MGWIZ(S) (INT2PTR(MGWIZ*, SvUVX((SV *) (S))))
248 /* ... Construct private data .............................................. */
250 STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
251 #define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
253 I32 i, alen = (args == NULL) ? 0 : av_len(args);
261 EXTEND(SP, alen + 1);
262 PUSHs(sv_2mortal(newRV_inc(sv)));
263 for (i = 0; i < alen; ++i)
264 PUSHs(*av_fetch(args, i, 0));
267 call_sv(ctor, G_SCALAR);
271 #if VMG_HAS_PERL(5, 8, 3)
272 SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
274 nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
284 STATIC SV *vmg_data_get(SV *sv, U16 sig) {
285 MAGIC *mg, *moremagic;
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 == sig)) { break; }
292 if (mg) { return mg->mg_obj; }
298 /* ... Magic cast/dispell .................................................. */
301 STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
303 STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
305 prevmagic->mg_moremagic = moremagic;
307 SvMAGIC_set(sv, moremagic);
309 mg->mg_moremagic = NULL;
310 Safefree(mg->mg_ptr);
313 #endif /* VMG_UVAR */
315 STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
316 #define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
317 MAGIC *mg = NULL, *moremagic = NULL;
323 if (SvTYPE(sv) >= SVt_PVMG) {
324 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
325 moremagic = mg->mg_moremagic;
326 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
328 if (mg) { return 1; }
331 data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
332 mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
333 mg->mg_private = w->sig;
336 mg->mg_flags |= MGf_COPY;
337 #endif /* MGf_COPY */
340 mg->mg_flags |= MGf_DUP;
344 mg->mg_flags |= MGf_LOCAL;
345 #endif /* MGf_LOCAL */
348 if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
353 uf[0].uf_val = vmg_svt_val;
360 /* One uvar magic in the chain is enough. */
361 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
362 moremagic = mg->mg_moremagic;
363 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
366 if (mg) { /* Found another uvar magic. */
367 struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
368 if (olduf->uf_val == vmg_svt_val) {
369 /* It's our uvar magic, nothing to do. */
372 /* It's another uvar magic, backup it and replace it by ours. */
374 vmg_uvar_del(sv, prevmagic, mg, moremagic);
379 vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
383 #endif /* VMG_UVAR */
388 STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
389 #define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
392 #endif /* VMG_UVAR */
393 MAGIC *mg, *prevmagic, *moremagic = NULL;
395 if (SvTYPE(sv) < SVt_PVMG) { return 0; }
397 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
398 moremagic = mg->mg_moremagic;
399 if (mg->mg_type == PERL_MAGIC_ext) {
400 if (mg->mg_private == sig) {
402 /* If the current has no uvar, short-circuit uvar deletion. */
403 uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
404 #endif /* VMG_UVAR */
407 } else if ((mg->mg_private >= SIG_MIN) &&
408 (mg->mg_private <= SIG_MAX) &&
409 SV2MGWIZ(mg->mg_ptr)->uvar) {
411 /* We can't break here since we need to find the ext magic to delete. */
412 #endif /* VMG_UVAR */
416 if (!mg) { return 0; }
419 prevmagic->mg_moremagic = moremagic;
421 SvMAGIC_set(sv, moremagic);
423 mg->mg_moremagic = NULL;
425 if (mg->mg_obj != sv) { SvREFCNT_dec(mg->mg_obj); } /* Destroy private data */
426 SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
430 if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
431 /* mg was the first ext magic in the chain that had uvar */
433 for (mg = moremagic; mg; mg = mg->mg_moremagic) {
434 if ((mg->mg_type == PERL_MAGIC_ext) &&
435 (mg->mg_private >= SIG_MIN) &&
436 (mg->mg_private <= SIG_MAX) &&
437 SV2MGWIZ(mg->mg_ptr)->uvar) {
445 for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
446 moremagic = mg->mg_moremagic;
447 if (mg->mg_type == PERL_MAGIC_uvar) { break; }
450 uf = (struct ufuncs *) mg->mg_ptr;
451 /* assert(uf->uf_val == vmg_svt_val); */
452 if (uf[1].uf_val || uf[1].uf_set) {
453 /* Revert the original uvar magic. */
455 Renew(uf, 1, struct ufuncs);
456 mg->mg_ptr = (char *) uf;
457 mg->mg_len = sizeof(struct ufuncs);
459 /* Remove the uvar magic. */
460 vmg_uvar_del(sv, prevmagic, mg, moremagic);
464 #endif /* VMG_UVAR */
469 /* ... svt callbacks ....................................................... */
471 #define VMG_CB_CALL_ARGS_MASK 15
472 #define VMG_CB_CALL_EVAL 16
474 STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int flags, ...){
479 unsigned int args = flags & VMG_CB_CALL_ARGS_MASK;
480 unsigned int eval = flags & VMG_CB_CALL_EVAL ? G_EVAL : 0;
488 EXTEND(SP, args + 2);
489 PUSHs(sv_2mortal(newRV_inc(sv)));
490 PUSHs(data ? data : &PL_sv_undef);
492 for (i = 0; i < args; ++i) {
493 SV *sva = va_arg(ap, SV *);
494 PUSHs(sva ? sva : &PL_sv_undef);
499 call_sv(cb, G_SCALAR | eval);
502 if (eval && IN_PERL_COMPILETIME && SvTRUE(ERRSV))
505 ret = SvOK(svr) ? SvIV(svr) : 0;
514 #define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
515 #define vmg_cb_call1e(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), VMG_CB_CALL_EVAL)
516 #define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
517 #define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
519 STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
520 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
523 STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
524 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
527 STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
535 has_array = SvTYPE(sv) == SVt_PVAV;
542 PUSHs(sv_2mortal(newRV_inc(sv)));
543 PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
545 len = av_len((AV *) sv) + 1;
553 count = call_sv(SV2MGWIZ(mg->mg_ptr)->cb_len, G_SCALAR);
557 ret = SvOK(svr) ? SvUV(svr) : len;
563 return has_array ? ret - 1 : ret;
566 STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
567 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
570 STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
571 SV *wiz = (SV *) mg->mg_ptr;
574 /* This may happen in global destruction */
575 if (SvTYPE(wiz) == SVTYPEMASK)
578 /* So that it can survive tmp cleanup in vmg_cb_call */
581 #if !VMG_HAS_PERL_MAINT(5, 11, 0, 32686)
582 /* The previous magic tokens were freed but the magic chain wasn't updated, so
583 * if you access the sv from the callback the old deleted magics will trigger
584 * and cause memory misreads. Change 32686 solved it that way : */
588 /* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
589 * mg->mg_ptr reference count */
590 ret = vmg_cb_call1e(SV2MGWIZ(wiz)->cb_free, sv, mg->mg_obj);
592 /* Calling SvREFCNT_dec() will trigger destructors in an infinite loop, so
593 * we have to rely on SvREFCNT() being a lvalue. Heck, even the core does it */
600 STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
601 # if VMG_HAS_PERL_MAINT(5, 11, 0, 33256)
610 if (keylen == HEf_SVKEY) {
613 keysv = newSVpvn(key, keylen);
616 ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
618 if (keylen != HEf_SVKEY) {
624 #endif /* MGf_COPY */
627 STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
633 STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
634 return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
636 #endif /* MGf_LOCAL */
639 STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
644 mg = mg_find(sv, PERL_MAGIC_uvar);
645 /* mg can't be NULL or we wouldn't be there. */
647 uf = (struct ufuncs *) mg->mg_ptr;
649 if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
650 if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
652 action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
653 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
655 if ((mg->mg_type != PERL_MAGIC_ext)
656 || (mg->mg_private < SIG_MIN)
657 || (mg->mg_private > SIG_MAX)) { continue; }
658 w = SV2MGWIZ(mg->mg_ptr);
659 if (!w->uvar) { continue; }
662 if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
664 case HV_FETCH_ISSTORE:
665 case HV_FETCH_LVALUE:
666 case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
667 if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
669 case HV_FETCH_ISEXISTS:
670 if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
673 if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
680 #endif /* VMG_UVAR */
682 /* ... Wizard destructor ................................................... */
684 STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
688 if (PL_dirty) /* During global destruction, the context is already freed */
693 if (w->owner != aTHX)
696 #endif /* VMG_MULTIPLICITY */
700 if (hv_delete(MY_CXT, buf, sprintf(buf, "%u", w->sig), 0) != wiz)
703 SvFLAGS(wiz) |= SVf_BREAK;
706 if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
707 if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
708 if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
709 if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
710 if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
711 if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
713 if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
714 #endif /* MGf_COPY */
716 if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
719 if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
720 #endif /* MGf_LOCAL */
722 if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
723 if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
724 if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
725 if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
726 #endif /* VMG_UVAR */
734 STATIC MGVTBL vmg_wizard_vtbl = {
739 vmg_wizard_free, /* free */
742 #endif /* MGf_COPY */
748 #endif /* MGf_LOCAL */
751 STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
752 STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
753 STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
754 STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
755 STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
757 STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
758 #define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
763 } else if (SvNOK(sv)) {
765 } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
768 croak(vmg_invalid_sig);
770 if (sig < SIG_MIN) { sig += SIG_MIN; }
771 if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
776 STATIC U16 vmg_wizard_sig(pTHX_ SV *wiz) {
777 #define vmg_wizard_sig(W) vmg_wizard_sig(aTHX_ (W))
782 sig = SV2MGWIZ(SvRV(wiz))->sig;
783 } else if (SvOK(wiz)) {
784 sig = vmg_sv2sig(wiz);
786 croak(vmg_invalid_wiz);
791 if (!hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))
797 STATIC SV *vmg_wizard_wiz(pTHX_ SV *wiz) {
798 #define vmg_wizard_wiz(W) vmg_wizard_wiz(aTHX_ (W))
806 if (SV2MGWIZ(wiz)->owner == aTHX)
808 #endif /* VMG_MULTIPLICITY */
809 sig = SV2MGWIZ(wiz)->sig;
810 } else if (SvOK(wiz)) {
811 sig = vmg_sv2sig(wiz);
813 croak(vmg_invalid_wiz);
818 return (old = hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))
823 #define VMG_SET_CB(S, N) \
825 w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
827 #define VMG_SET_SVT_CB(S, N) \
829 if (SvOK(cb) && SvROK(cb)) { \
830 t->svt_ ## N = vmg_svt_ ## N; \
831 w->cb_ ## N = newRV_inc(SvRV(cb)); \
833 t->svt_ ## N = NULL; \
834 w->cb_ ## N = NULL; \
839 #define VMG_CLONE_CB(N) \
840 z->cb_ ## N = (w->cb_ ## N) ? newRV_inc(vmg_clone(SvRV(w->cb_ ## N), \
844 STATIC MGWIZ *vmg_wizard_clone(pTHX_ const MGWIZ *w) {
845 #define vmg_wizard_clone(W) vmg_wizard_clone(aTHX_ (W))
850 Copy(w->vtbl, t, 1, MGVTBL);
861 #endif /* MGf_COPY */
867 #endif /* MGf_LOCAL */
871 VMG_CLONE_CB(exists);
872 VMG_CLONE_CB(delete);
873 #endif /* VMG_UVAR */
882 #endif /* VMG_THREADSAFE */
884 /* --- XS ------------------------------------------------------------------ */
886 MODULE = Variable::Magic PACKAGE = Variable::Magic
895 hv_iterinit(MY_CXT); /* Allocate iterator */
896 stash = gv_stashpv(__PACKAGE__, 1);
897 newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
898 newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
899 newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
900 newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
901 newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
902 newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
903 newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
904 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
905 newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
906 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID",
907 newSVuv(VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID));
908 newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
909 newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
910 newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
911 newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
912 newCONSTSUB(stash, "VMG_PERL_PATCHLEVEL", newSVuv(VMG_PERL_PATCHLEVEL));
913 newCONSTSUB(stash, "VMG_THREADSAFE", newSVuv(VMG_THREADSAFE));
927 hv_iterinit(hv); /* Allocate iterator */
929 while ((key = hv_iternext(MY_CXT))) {
931 char *sig = HePV(key, len);
934 sv = MGWIZ2SV(vmg_wizard_clone(SV2MGWIZ(HeVAL(key))));
935 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
936 mg->mg_private = SIG_WIZ;
938 hv_store(hv, sig, len, sv, HeHASH(key));
945 #endif /* VMG_THREADSAFE */
965 #endif /* MGf_COPY */
971 #endif /* MGf_LOCAL */
974 #endif /* VMG_UVAR */
975 ) { croak(vmg_wrongargnum); }
980 sig = vmg_sv2sig(svsig);
981 if ((old = hv_fetch(MY_CXT, buf, sprintf(buf, "%u", sig), 0))) {
982 ST(0) = sv_2mortal(newRV_inc(*old));
986 if (HvKEYS(MY_CXT) >= SIG_NBR) { croak(vmg_toomanysigs); }
993 VMG_SET_CB(ST(i++), data);
994 VMG_SET_SVT_CB(ST(i++), get);
995 VMG_SET_SVT_CB(ST(i++), set);
996 VMG_SET_SVT_CB(ST(i++), len);
997 VMG_SET_SVT_CB(ST(i++), clear);
998 VMG_SET_SVT_CB(ST(i++), free);
1000 VMG_SET_SVT_CB(ST(i++), copy);
1001 #endif /* MGf_COPY */
1003 /* VMG_SET_SVT_CB(ST(i++), dup); */
1007 #endif /* MGf_DUP */
1009 VMG_SET_SVT_CB(ST(i++), local);
1010 #endif /* MGf_LOCAL */
1012 VMG_SET_CB(ST(i++), fetch);
1013 VMG_SET_CB(ST(i++), store);
1014 VMG_SET_CB(ST(i++), exists);
1015 VMG_SET_CB(ST(i++), delete);
1016 #endif /* VMG_UVAR */
1017 #if VMG_MULTIPLICITY
1019 #endif /* VMG_MULTIPLICITY */
1024 w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
1025 #endif /* VMG_UVAR */
1028 mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, 0);
1029 mg->mg_private = SIG_WIZ;
1032 hv_store(MY_CXT, buf, sprintf(buf, "%u", sig), sv, 0);
1034 RETVAL = newRV_noinc(sv);
1042 if (HvKEYS(MY_CXT) >= SIG_NBR) { croak(vmg_toomanysigs); }
1043 RETVAL = newSVuv(vmg_gensig());
1050 if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
1051 RETVAL = newSVuv(SV2MGWIZ(SvRV(wiz))->sig);
1055 SV *cast(SV *sv, SV *wiz, ...)
1056 PROTOTYPE: \[$@%&*]$@
1061 wiz = vmg_wizard_wiz(wiz);
1067 av_fill(args, items - 2);
1068 for (i = 2; i < items; ++i) {
1071 if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
1074 ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
1080 SV *getdata(SV *sv, SV *wiz)
1081 PROTOTYPE: \[$@%&*]$
1086 sig = vmg_wizard_sig(wiz);
1089 data = vmg_data_get(SvRV(sv), sig);
1090 if (!data) { XSRETURN_UNDEF; }
1094 SV *dispell(SV *sv, SV *wiz)
1095 PROTOTYPE: \[$@%&*]$
1099 sig = vmg_wizard_sig(wiz);
1102 RETVAL = newSVuv(vmg_dispell(SvRV(sv), sig));