+#define __PACKAGE__ "Variable::Magic"
+
+#undef VOID2
+#ifdef __cplusplus
+# define VOID2(T, P) static_cast<T>(P)
+#else
+# define VOID2(T, P) (P)
+#endif
+
+#ifndef VMG_PERL_PATCHLEVEL
+# ifdef PERL_PATCHNUM
+# define VMG_PERL_PATCHLEVEL PERL_PATCHNUM
+# else
+# define VMG_PERL_PATCHLEVEL 0
+# endif
+#endif
+
+#define VMG_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
+
+#define VMG_HAS_PERL_BRANCH(R, V, S) (PERL_REVISION == (R) && PERL_VERSION == (V) && PERL_SUBVERSION >= (S))
+
+#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))))
+
+/* --- Threads and multiplicity -------------------------------------------- */
+
+#ifndef NOOP
+# define NOOP
+#endif
+
+#ifndef dNOOP
+# define dNOOP
+#endif
+
+/* Safe unless stated otherwise in Makefile.PL */
+#ifndef VMG_FORKSAFE
+# define VMG_FORKSAFE 1
+#endif
+
+#ifndef VMG_MULTIPLICITY
+# if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
+# define VMG_MULTIPLICITY 1
+# else
+# define VMG_MULTIPLICITY 0
+# endif
+#endif
+
+#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))
+# define VMG_THREADSAFE 1
+# ifndef MY_CXT_CLONE
+# define MY_CXT_CLONE \
+ dMY_CXT_SV; \
+ my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
+ Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
+ sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
+# endif
+#else
+# define VMG_THREADSAFE 0
+# undef dMY_CXT
+# define dMY_CXT dNOOP
+# undef MY_CXT
+# define MY_CXT vmg_globaldata
+# undef START_MY_CXT
+# define START_MY_CXT STATIC my_cxt_t MY_CXT;
+# undef MY_CXT_INIT
+# define MY_CXT_INIT NOOP
+# undef MY_CXT_CLONE
+# define MY_CXT_CLONE NOOP
+#endif
+
+#if VMG_THREADSAFE
+# define VMG_LOCK(M) MUTEX_LOCK(M)
+# define VMG_UNLOCK(M) MUTEX_UNLOCK(M)
+#else
+# define VMG_LOCK(M)
+# define VMG_UNLOCK(M)
+#endif
+
+/* --- Compatibility ------------------------------------------------------- */
+
+#ifndef Newx
+# define Newx(v, n, c) New(0, v, n, c)
+#endif
+
+#ifndef SvMAGIC_set
+# define SvMAGIC_set(sv, val) (SvMAGIC(sv) = (val))
+#endif
+
+#ifndef SvRV_const
+# define SvRV_const(sv) SvRV((SV *) sv)
+#endif
+
+#ifndef SvREFCNT_inc_simple_void
+# define SvREFCNT_inc_simple_void(sv) ((void) SvREFCNT_inc(sv))
+#endif
+
+#ifndef mPUSHu
+# define mPUSHu(U) PUSHs(sv_2mortal(newSVuv(U)))
+#endif
+
+#ifndef PERL_MAGIC_ext
+# define PERL_MAGIC_ext '~'
+#endif
+
+#ifndef PERL_MAGIC_tied
+# define PERL_MAGIC_tied 'P'
+#endif
+
+#ifndef MGf_LOCAL
+# define MGf_LOCAL 0
+#endif
+
+#ifndef IN_PERL_COMPILETIME
+# define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
+#endif
+
+/* uvar magic and Hash::Util::FieldHash were commited with 28419, but we only
+ * enable them on 5.10 */
+#if VMG_HAS_PERL(5, 10, 0)
+# define VMG_UVAR 1
+#else
+# define VMG_UVAR 0
+#endif
+
+#if VMG_HAS_PERL_MAINT(5, 11, 0, 32969) || VMG_HAS_PERL(5, 12, 0)
+# define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
+#else
+# define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
+#endif
+
+#if VMG_HAS_PERL(5, 17, 4)
+# define VMG_COMPAT_SCALAR_NOLEN 1
+#else
+# define VMG_COMPAT_SCALAR_NOLEN 0
+#endif
+
+/* Applied to dev-5.9 as 25854, integrated to maint-5.8 as 28160, partially
+ * reverted to dev-5.11 as 9cdcb38b */
+#if VMG_HAS_PERL_MAINT(5, 8, 9, 28160) || VMG_HAS_PERL_MAINT(5, 9, 3, 25854) || VMG_HAS_PERL(5, 10, 0)
+# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
+# if VMG_HAS_PERL(5, 11, 0)
+# define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
+# else
+# define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
+# endif
+# endif
+# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
+# define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 1
+# endif
+#else
+# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN
+# define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
+# endif
+# ifndef VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID
+# define VMG_COMPAT_ARRAY_PUSH_NOLEN_VOID 0
+# endif
+#endif
+
+/* Applied to dev-5.11 as 34908 */
+#if VMG_HAS_PERL_MAINT(5, 11, 0, 34908) || VMG_HAS_PERL(5, 12, 0)
+# define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 1
+#else
+# define VMG_COMPAT_ARRAY_UNSHIFT_NOLEN_VOID 0
+#endif
+
+/* Applied to dev-5.9 as 31473 (see #43357), integrated to maint-5.8 as 32542 */
+#if VMG_HAS_PERL_MAINT(5, 8, 9, 32542) || VMG_HAS_PERL_MAINT(5, 9, 5, 31473) || VMG_HAS_PERL(5, 10, 0)
+# define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
+#else
+# define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
+#endif
+
+#if VMG_HAS_PERL(5, 11, 0)
+# define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 1
+#else
+# define VMG_COMPAT_HASH_DELETE_NOUVAR_VOID 0
+#endif
+
+#if VMG_HAS_PERL(5, 17, 0)
+# define VMG_COMPAT_CODE_COPY_CLONE 1
+#else
+# define VMG_COMPAT_CODE_COPY_CLONE 0
+#endif
+
+#if VMG_HAS_PERL(5, 13, 2)
+# define VMG_COMPAT_GLOB_GET 1
+#else
+# define VMG_COMPAT_GLOB_GET 0
+#endif
+
+#define VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE (VMG_HAS_PERL(5, 10, 0) && !VMG_HAS_PERL(5, 10, 1))
+
+/* NewOp() isn't public in perl 5.8.0. */
+#define VMG_RESET_RMG_NEEDS_TRAMPOLINE (VMG_UVAR && (VMG_THREADSAFE || !VMG_HAS_PERL(5, 8, 1)))
+
+/* ... Bug-free mg_magical ................................................. */
+
+/* See the discussion at http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html */
+
+#if VMG_HAS_PERL(5, 11, 3)
+
+#define vmg_mg_magical(S) mg_magical(S)
+
+#else
+
+static void vmg_mg_magical(SV *sv) {
+ const MAGIC *mg;
+
+ SvMAGICAL_off(sv);
+ if ((mg = SvMAGIC(sv))) {
+ do {
+ const MGVTBL* const vtbl = mg->mg_virtual;
+ if (vtbl) {
+ if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
+ SvGMAGICAL_on(sv);
+ if (vtbl->svt_set)
+ SvSMAGICAL_on(sv);
+ if (vtbl->svt_clear)
+ SvRMAGICAL_on(sv);
+ }
+ } while ((mg = mg->mg_moremagic));
+ if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
+ SvRMAGICAL_on(sv);
+ }
+}
+
+#endif
+
+/* --- Trampoline ops ------------------------------------------------------ */
+
+#define VMG_NEEDS_TRAMPOLINE VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE || VMG_RESET_RMG_NEEDS_TRAMPOLINE
+
+#if VMG_NEEDS_TRAMPOLINE
+
+typedef struct {
+ OP temp;
+ SVOP target;
+} vmg_trampoline;
+
+static void vmg_trampoline_init(vmg_trampoline *t, OP *(*cb)(pTHX)) {
+ t->temp.op_type = OP_STUB;
+ t->temp.op_ppaddr = 0;
+ t->temp.op_next = (OP *) &t->target;
+ t->temp.op_flags = 0;
+ t->temp.op_private = 0;
+
+ t->target.op_type = OP_STUB;
+ t->target.op_ppaddr = cb;
+ t->target.op_next = NULL;
+ t->target.op_flags = 0;
+ t->target.op_private = 0;
+ t->target.op_sv = NULL;
+}
+
+static OP *vmg_trampoline_bump(pTHX_ vmg_trampoline *t, SV *sv, OP *o) {
+#define vmg_trampoline_bump(T, S, O) vmg_trampoline_bump(aTHX_ (T), (S), (O))
+ t->temp = *o;
+ t->temp.op_next = (OP *) &t->target;
+
+ t->target.op_sv = sv;
+ t->target.op_next = o->op_next;
+
+ return &t->temp;
+}
+
+#endif /* VMG_NEEDS_TRAMPOLINE */
+
+/* --- Cleaner version of sv_magicext() ------------------------------------ */
+
+static MAGIC *vmg_sv_magicext(pTHX_ SV *sv, SV *obj, const MGVTBL *vtbl, const void *ptr, I32 len) {
+#define vmg_sv_magicext(S, O, V, P, L) vmg_sv_magicext(aTHX_ (S), (O), (V), (P), (L))
+ MAGIC *mg;
+
+ mg = sv_magicext(sv, obj, PERL_MAGIC_ext, vtbl, ptr, len);
+ if (!mg)
+ return NULL;
+
+ mg->mg_private = 0;
+
+ if (vtbl->svt_copy)
+ mg->mg_flags |= MGf_COPY;
+#if MGf_DUP
+ if (vtbl->svt_dup)
+ mg->mg_flags |= MGf_DUP;
+#endif /* MGf_DUP */
+#if MGf_LOCAL
+ if (vtbl->svt_local)
+ mg->mg_flags |= MGf_LOCAL;
+#endif /* MGf_LOCAL */
+
+ if (mg->mg_flags & MGf_REFCOUNTED)
+ SvREFCNT_dec(obj);
+
+ return mg;
+}
+
+/* --- Safe version of call_sv() ------------------------------------------- */
+
+static I32 vmg_call_sv(pTHX_ SV *sv, I32 flags, int (*cleanup)(pTHX_ void *), void *ud) {
+#define vmg_call_sv(S, F, C, U) vmg_call_sv(aTHX_ (S), (F), (C), (U))
+ I32 ret, cxix;
+ PERL_CONTEXT saved_cx;
+ SV *old_err = NULL;
+
+ if (SvTRUE(ERRSV)) {
+ old_err = newSVsv(ERRSV);
+ sv_setsv(ERRSV, &PL_sv_undef);
+ }
+
+ cxix = (cxstack_ix < cxstack_max) ? (cxstack_ix + 1) : Perl_cxinc(aTHX);
+ /* The last popped context will be reused by call_sv(), but our callers may
+ * still need its previous value. Back it up so that it isn't clobbered. */
+ saved_cx = cxstack[cxix];
+
+ ret = call_sv(sv, flags | G_EVAL);
+
+ cxstack[cxix] = saved_cx;
+
+ if (SvTRUE(ERRSV)) {
+ SvREFCNT_dec(old_err);
+
+ if (IN_PERL_COMPILETIME) {
+ if (!PL_in_eval) {
+ if (PL_errors)
+ sv_catsv(PL_errors, ERRSV);
+ else
+ Perl_warn(aTHX_ "%s", SvPV_nolen(ERRSV));
+ SvCUR_set(ERRSV, 0);
+ }
+#if VMG_HAS_PERL(5, 10, 0) || defined(PL_parser)
+ if (PL_parser)
+ ++PL_parser->error_count;
+#elif defined(PL_error_count)
+ ++PL_error_count;
+#else
+ ++PL_Ierror_count;
+#endif
+ } else {
+ if (!cleanup || cleanup(aTHX_ ud))
+ croak(NULL);
+ }
+ } else {
+ if (old_err) {
+ sv_setsv(ERRSV, old_err);
+ SvREFCNT_dec(old_err);
+ }
+ }
+
+ return ret;
+}
+
+/* --- Stolen chunk of B --------------------------------------------------- */
+
+typedef enum {
+ OPc_NULL,
+ OPc_BASEOP,
+ OPc_UNOP,
+ OPc_BINOP,
+ OPc_LOGOP,
+ OPc_LISTOP,
+ OPc_PMOP,
+ OPc_SVOP,
+ OPc_PADOP,
+ OPc_PVOP,
+ OPc_LOOP,
+ OPc_COP,
+#if VMG_HAS_PERL(5, 21, 5)
+ OPc_METHOP,
+#endif
+ OPc_MAX
+} opclass;
+
+static const char *const vmg_opclassnames[] = {
+ "B::NULL",
+ "B::OP",
+ "B::UNOP",
+ "B::BINOP",
+ "B::LOGOP",
+ "B::LISTOP",
+ "B::PMOP",
+ "B::SVOP",
+ "B::PADOP",
+ "B::PVOP",
+ "B::LOOP",
+ "B::COP",
+#if VMG_HAS_PERL(5, 21, 5)
+ "B::METHOP",
+#endif
+ NULL
+};
+
+static opclass vmg_opclass(const OP *o) {
+#if 0
+ if (!o)
+ return OPc_NULL;
+#endif
+
+ if (o->op_type == 0)
+ return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
+
+ if (o->op_type == OP_SASSIGN)
+ return ((o->op_private & OPpASSIGN_BACKWARDS) ? OPc_UNOP : OPc_BINOP);
+
+ if (o->op_type == OP_AELEMFAST) {
+#if PERL_VERSION <= 14
+ if (o->op_flags & OPf_SPECIAL)
+ return OPc_BASEOP;
+ else
+#endif
+#ifdef USE_ITHREADS
+ return OPc_PADOP;
+#else
+ return OPc_SVOP;
+#endif
+ }
+
+#ifdef USE_ITHREADS
+ if (o->op_type == OP_GV || o->op_type == OP_GVSV || o->op_type == OP_RCATLINE)
+ return OPc_PADOP;
+#endif
+
+ switch (PL_opargs[o->op_type] & OA_CLASS_MASK) {
+ case OA_BASEOP:
+ return OPc_BASEOP;
+ case OA_UNOP:
+ return OPc_UNOP;
+ case OA_BINOP:
+ return OPc_BINOP;
+ case OA_LOGOP:
+ return OPc_LOGOP;
+ case OA_LISTOP:
+ return OPc_LISTOP;
+ case OA_PMOP:
+ return OPc_PMOP;
+ case OA_SVOP:
+ return OPc_SVOP;
+ case OA_PADOP:
+ return OPc_PADOP;
+ case OA_PVOP_OR_SVOP:
+ return (o->op_private & (OPpTRANS_TO_UTF|OPpTRANS_FROM_UTF)) ? OPc_SVOP : OPc_PVOP;
+ case OA_LOOP:
+ return OPc_LOOP;
+ case OA_COP:
+ return OPc_COP;
+ case OA_BASEOP_OR_UNOP:
+ return (o->op_flags & OPf_KIDS) ? OPc_UNOP : OPc_BASEOP;
+ case OA_FILESTATOP:
+ return ((o->op_flags & OPf_KIDS) ? OPc_UNOP :
+#ifdef USE_ITHREADS
+ (o->op_flags & OPf_REF) ? OPc_PADOP : OPc_BASEOP);
+#else
+ (o->op_flags & OPf_REF) ? OPc_SVOP : OPc_BASEOP);
+#endif
+ case OA_LOOPEXOP:
+ if (o->op_flags & OPf_STACKED)
+ return OPc_UNOP;
+ else if (o->op_flags & OPf_SPECIAL)
+ return OPc_BASEOP;
+ else
+ return OPc_PVOP;
+#if VMG_HAS_PERL(5, 21, 5)
+ case OA_METHOP:
+ return OPc_METHOP;
+#endif
+ }
+
+ return OPc_BASEOP;
+}
+
+/* --- Error messages ------------------------------------------------------ */
+
+static const char vmg_invalid_wiz[] = "Invalid wizard object";
+static const char vmg_wrongargnum[] = "Wrong number of arguments";
+static const char vmg_argstorefailed[] = "Error while storing arguments";
+
+/* --- Context-safe global data -------------------------------------------- */
+
+#define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
+
+typedef struct {
+ HV *b__op_stashes[OPc_MAX];
+ I32 depth;
+ MAGIC *freed_tokens;
+#if VMG_PROPAGATE_ERRSV_NEEDS_TRAMPOLINE
+ vmg_trampoline propagate_errsv;
+#endif
+#if VMG_RESET_RMG_NEEDS_TRAMPOLINE
+ vmg_trampoline reset_rmg;
+#endif
+} my_cxt_t;
+
+START_MY_CXT