+/* This file is part of the Variable::Magic Perl module.
+ * See http://search.cpan.org/dist/Variable-Magic/ */
+
+#include <stdarg.h> /* <va_list>, va_{start,arg,end}, ... */
+
+#include <stdio.h> /* sprintf() */
+
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
-#define SIG_WIZ ((U16) (1u << 8 - 1))
+#define __PACKAGE__ "Variable::Magic"
+
+#define R(S) fprintf(stderr, "R(" #S ") = %d\n", SvREFCNT(S))
+
+#define PERL_VERSION_GE(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
+
+#define PERL_VERSION_LE(R, V, S) (PERL_REVISION < (R) || (PERL_REVISION == (R) && (PERL_VERSION < (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION <= (S))))))
+
+#define PERL_API_VERSION_GE(R, V, S) (PERL_API_REVISION > (R) || (PERL_API_REVISION == (R) && (PERL_API_VERSION > (V) || (PERL_API_VERSION == (V) && (PERL_API_SUBVERSION >= (S))))))
+
+#define PERL_API_VERSION_LE(R, V, S) (PERL_API_REVISION < (R) || (PERL_API_REVISION == (R) && (PERL_API_VERSION < (V) || (PERL_API_VERSION == (V) && (PERL_API_SUBVERSION <= (S))))))
+
+#ifndef VMG_PERL_PATCHLEVEL
+# ifdef PERL_PATCHNUM
+# define VMG_PERL_PATCHLEVEL PERL_PATCHNUM
+# else
+# define VMG_PERL_PATCHLEVEL 0
+# endif
+#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 dMY_CXT
+# define MY_CXT vmg_globaldata
+# define dMY_CXT
+# define START_MY_CXT STATIC my_cxt_t MY_CXT;
+# define MY_CXT_INIT
+#endif
+
+#ifndef PERL_MAGIC_ext
+# define PERL_MAGIC_ext '~'
+#endif
+
+#ifndef MGf_COPY
+# define MGf_COPY 0
+#endif
+
+#ifndef MGf_DUP
+# define MGf_DUP 0
+#endif
+
+#ifndef MGf_LOCAL
+# define MGf_LOCAL 0
+#endif
+
+#if PERL_API_VERSION_GE(5, 10, 0)
+# define VMG_UVAR 1
+#else
+# define VMG_UVAR 0
+#endif
+
+#if (VMG_PERL_PATCHLEVEL >= 25854) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 9, 3))
+# define VMG_COMPAT_ARRAY_PUSH_NOLEN 1
+#else
+# define VMG_COMPAT_ARRAY_PUSH_NOLEN 0
+#endif
+
+/* since 5.9.5 - see #43357 */
+#if (VMG_PERL_PATCHLEVEL >= 31473) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 9, 5))
+# define VMG_COMPAT_ARRAY_UNDEF_CLEAR 1
+#else
+# define VMG_COMPAT_ARRAY_UNDEF_CLEAR 0
+#endif
+
+#if (VMG_PERL_PATCHLEVEL >= 32969) || (!VMG_PERL_PATCHLEVEL && PERL_VERSION_GE(5, 11, 0))
+# define VMG_COMPAT_SCALAR_LENGTH_NOLEN 1
+#else
+# define VMG_COMPAT_SCALAR_LENGTH_NOLEN 0
+#endif
+
+#if VMG_UVAR
+
+/* Bug-free mg_magical - see http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2008-01/msg00036.html, but specialized to our needs. */
+STATIC void vmg_sv_magicuvar(pTHX_ SV *sv, const char *uf, I32 len) {
+#define vmg_sv_magicuvar(S, U, L) vmg_sv_magicuvar(aTHX_ (S), (U), (L))
+ const MAGIC* mg;
+ sv_magic(sv, NULL, PERL_MAGIC_uvar, uf, len);
+ /* uvar magic has set and get magic, hence this has set SVs_GMG and SVs_SMG. */
+ PERL_UNUSED_CONTEXT;
+ if ((mg = SvMAGIC(sv))) {
+ SvRMAGICAL_off(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);
+ break;
+ }
+ }
+ } while ((mg = mg->mg_moremagic));
+/*
+ if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
+ SvRMAGICAL_on(sv);
+*/
+ }
+}
-#define R(S) fprintf(stderr, "R(" #S ") = %d\n", SvREFCNT(sv))
+#endif /* VMG_UVAR */
+
+/* --- Context-safe global data -------------------------------------------- */
+
+#define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
+
+typedef struct {
+ HV *wizz;
+ U16 count;
+} my_cxt_t;
+
+START_MY_CXT
+
+/* --- Signatures ---------------------------------------------------------- */
+
+#define SIG_MIN ((U16) (1u << 8))
+#define SIG_MAX ((U16) ((1u << 16) - 1))
+#define SIG_NBR (SIG_MAX - SIG_MIN + 1)
+#define SIG_WIZ ((U16) ((1u << 8) - 1))
+
+/* ... Generate signatures ................................................. */
+
+STATIC U16 vmg_gensig(pTHX) {
+#define vmg_gensig() vmg_gensig(aTHX)
+ U16 sig;
+ char buf[8];
+ dMY_CXT;
+
+ do {
+ sig = SIG_NBR * Drand01() + SIG_MIN;
+ } while (hv_exists(MY_CXT.wizz, buf, sprintf(buf, "%u", sig)));
+
+ return sig;
+}
+
+/* --- MGWIZ structure ----------------------------------------------------- */
typedef struct {
MGVTBL *vtbl;
U16 sig;
- SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free, *cb_data;
+ U16 uvar;
+ SV *cb_data;
+ SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free;
+#if MGf_COPY
+ SV *cb_copy;
+#endif /* MGf_COPY */
+#if MGf_DUP
+ SV *cb_dup;
+#endif /* MGf_DUP */
+#if MGf_LOCAL
+ SV *cb_local;
+#endif /* MGf_LOCAL */
+#if VMG_UVAR
+ SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
+#endif /* VMG_UVAR */
} MGWIZ;
#define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
/* ... Construct private data .............................................. */
-STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv) {
-#define vmg_data_new(C, S) vmg_data_new(aTHX_ (C), (S))
+STATIC SV *vmg_data_new(pTHX_ SV *ctor, SV *sv, AV *args) {
+#define vmg_data_new(C, S, A) vmg_data_new(aTHX_ (C), (S), (A))
SV *nsv;
dSP;
SAVETMPS;
PUSHMARK(SP);
- XPUSHs(sv);
+ XPUSHs(sv_2mortal(newRV_inc(sv)));
+ if (args != NULL) {
+ I32 i, alen = av_len(args);
+ for (i = 0; i < alen; ++i) { XPUSHs(*av_fetch(args, i, 0)); }
+ }
PUTBACK;
count = call_sv(ctor, G_SCALAR);
if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
nsv = POPs;
- SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
+#if PERL_VERSION_LE(5, 8, 2)
+ nsv = sv_newref(nsv); /* Workaround some bug in SvREFCNT_inc() */
+#else
+ SvREFCNT_inc(nsv); /* Or it will be destroyed in FREETMPS */
+#endif
PUTBACK;
STATIC SV *vmg_data_get(SV *sv, U16 sig) {
MAGIC *mg, *moremagic;
- MGWIZ *w;
if (SvTYPE(sv) >= SVt_PVMG) {
for (mg = SvMAGIC(sv); mg; mg = moremagic) {
/* ... Magic cast/dispell .................................................. */
-STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz) {
-#define vmg_cast(S, W) vmg_cast(aTHX_ (S), (W))
+#if VMG_UVAR
+STATIC I32 vmg_svt_val(pTHX_ IV, SV *);
+
+STATIC void vmg_uvar_del(SV *sv, MAGIC *prevmagic, MAGIC *mg, MAGIC *moremagic) {
+ if (prevmagic) {
+ prevmagic->mg_moremagic = moremagic;
+ } else {
+ SvMAGIC_set(sv, moremagic);
+ }
+ mg->mg_moremagic = NULL;
+ Safefree(mg->mg_ptr);
+ Safefree(mg);
+}
+#endif /* VMG_UVAR */
+
+STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
+#define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
MAGIC *mg = NULL, *moremagic = NULL;
MGWIZ *w;
SV *data;
if (mg) { return 1; }
}
- data = (w->cb_data) ? vmg_data_new(w->cb_data, sv) : NULL;
- mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl,
- (const char *) wiz, HEf_SVKEY);
+ data = (w->cb_data) ? vmg_data_new(w->cb_data, sv, args) : NULL;
+ mg = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (const char *) wiz, HEf_SVKEY);
mg->mg_private = w->sig;
+ mg->mg_flags = mg->mg_flags
+#if MGf_COPY
+ | MGf_COPY
+#endif /* MGf_COPY */
+#if MGf_DUP
+ | MGf_DUP
+#endif /* MGf_DUP */
+#if MGf_LOCAL
+ | MGf_LOCAL
+#endif /* MGf_LOCAL */
+ ;
+
+#if VMG_UVAR
+ if (w->uvar && SvTYPE(sv) >= SVt_PVHV) {
+ MAGIC *prevmagic;
+ int add_uvar = 1;
+ struct ufuncs uf[2];
+
+ uf[0].uf_val = vmg_svt_val;
+ uf[0].uf_set = NULL;
+ uf[0].uf_index = 0;
+ uf[1].uf_val = NULL;
+ uf[1].uf_set = NULL;
+ uf[1].uf_index = 0;
+
+ /* One uvar magic in the chain is enough. */
+ for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
+ moremagic = mg->mg_moremagic;
+ if (mg->mg_type == PERL_MAGIC_uvar) { break; }
+ }
+
+ if (mg) { /* Found another uvar magic. */
+ struct ufuncs *olduf = (struct ufuncs *) mg->mg_ptr;
+ if (olduf->uf_val == vmg_svt_val) {
+ /* It's our uvar magic, nothing to do. */
+ add_uvar = 0;
+ } else {
+ /* It's another uvar magic, backup it and replace it by ours. */
+ uf[1] = *olduf;
+ vmg_uvar_del(sv, prevmagic, mg, moremagic);
+ }
+ }
+
+ if (add_uvar) {
+ vmg_sv_magicuvar(sv, (const char *) &uf, sizeof(uf));
+ }
+
+ }
+#endif /* VMG_UVAR */
return 1;
}
STATIC UV vmg_dispell(pTHX_ SV *sv, U16 sig) {
#define vmg_dispell(S, Z) vmg_dispell(aTHX_ (S), (Z))
+#if VMG_UVAR
+ U32 uvars = 0;
+#endif /* VMG_UVAR */
MAGIC *mg, *prevmagic, *moremagic = NULL;
- MGWIZ *w;
if (SvTYPE(sv) < SVt_PVMG) { return 0; }
for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic) {
moremagic = mg->mg_moremagic;
- if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == sig)) { break; }
+ if (mg->mg_type == PERL_MAGIC_ext) {
+ if (mg->mg_private == sig) {
+#if VMG_UVAR
+ /* If the current has no uvar, short-circuit uvar deletion. */
+ uvars = (SV2MGWIZ(mg->mg_ptr)->uvar) ? (uvars + 1) : 0;
+#endif /* VMG_UVAR */
+ break;
+#if VMG_UVAR
+ } else if ((mg->mg_private >= SIG_MIN) &&
+ (mg->mg_private <= SIG_MAX) &&
+ SV2MGWIZ(mg->mg_ptr)->uvar) {
+ ++uvars;
+ /* We can't break here since we need to find the ext magic to delete. */
+#endif /* VMG_UVAR */
+ }
+ }
}
if (!mg) { return 0; }
SvREFCNT_dec((SV *) mg->mg_ptr); /* Unreference the wizard */
Safefree(mg);
+#if VMG_UVAR
+ if (uvars == 1 && SvTYPE(sv) >= SVt_PVHV) {
+ /* mg was the first ext magic in the chain that had uvar */
+
+ for (mg = moremagic; mg; mg = mg->mg_moremagic) {
+ if ((mg->mg_type == PERL_MAGIC_ext) &&
+ (mg->mg_private >= SIG_MIN) &&
+ (mg->mg_private <= SIG_MAX) &&
+ SV2MGWIZ(mg->mg_ptr)->uvar) {
+ ++uvars;
+ break;
+ }
+ }
+
+ if (uvars == 1) {
+ struct ufuncs *uf;
+ for (prevmagic = NULL, mg = SvMAGIC(sv); mg; prevmagic = mg, mg = moremagic){
+ moremagic = mg->mg_moremagic;
+ if (mg->mg_type == PERL_MAGIC_uvar) { break; }
+ }
+ /* assert(mg); */
+ uf = (struct ufuncs *) mg->mg_ptr;
+ /* assert(uf->uf_val == vmg_svt_val); */
+ if (uf[1].uf_val || uf[1].uf_set) {
+ /* Revert the original uvar magic. */
+ uf[0] = uf[1];
+ Renew(uf, 1, struct ufuncs);
+ mg->mg_ptr = (char *) uf;
+ mg->mg_len = sizeof(struct ufuncs);
+ } else {
+ /* Remove the uvar magic. */
+ vmg_uvar_del(sv, prevmagic, mg, moremagic);
+ }
+ }
+ }
+#endif /* VMG_UVAR */
+
return 1;
}
/* ... svt callbacks ....................................................... */
-STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data) {
-#define vmg_cb_call(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D))
+STATIC int vmg_cb_call(pTHX_ SV *cb, SV *sv, SV *data, unsigned int args, ...) {
+ va_list ap;
+ SV *svr;
int ret;
+ unsigned int i;
dSP;
int count;
SAVETMPS;
PUSHMARK(SP);
- switch (SvTYPE(sv)) {
- case SVt_PVAV:
- case SVt_PVHV: XPUSHs(sv_2mortal(newRV_inc(sv))); break;
- default: XPUSHs(sv);
+ EXTEND(SP, args + 2);
+ PUSHs(sv_2mortal(newRV_inc(sv)));
+ PUSHs(data ? data : &PL_sv_undef);
+ va_start(ap, args);
+ for (i = 0; i < args; ++i) {
+ SV *sva = va_arg(ap, SV *);
+ PUSHs(sva ? sva : &PL_sv_undef);
}
- if (data) { XPUSHs(data); }
+ va_end(ap);
PUTBACK;
count = call_sv(cb, G_SCALAR);
SPAGAIN;
if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
- ret = POPi;
+ svr = POPs;
+ ret = SvOK(svr) ? SvIV(svr) : 0;
PUTBACK;
return ret;
}
+#define vmg_cb_call1(I, S, D) vmg_cb_call(aTHX_ (I), (S), (D), 0)
+#define vmg_cb_call2(I, S, D, S2) vmg_cb_call(aTHX_ (I), (S), (D), 1, (S2))
+#define vmg_cb_call3(I, S, D, S2, S3) vmg_cb_call(aTHX_ (I), (S), (D), 2, (S2), (S3))
+
STATIC int vmg_svt_get(pTHX_ SV *sv, MAGIC *mg) {
- return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
+ return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_get, sv, mg->mg_obj);
}
STATIC int vmg_svt_set(pTHX_ SV *sv, MAGIC *mg) {
- return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
+ return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_set, sv, mg->mg_obj);
}
STATIC U32 vmg_svt_len(pTHX_ SV *sv, MAGIC *mg) {
+ SV *svr;
+ I32 len;
U32 ret;
dSP;
SAVETMPS;
PUSHMARK(SP);
- switch (SvTYPE(sv)) {
- case SVt_PVAV:
- case SVt_PVHV: XPUSHs(sv_2mortal(newRV_inc(sv))); break;
- default: XPUSHs(sv);
- }
- XPUSHs((mg->mg_obj) ? (mg->mg_obj) : &PL_sv_undef);
+ EXTEND(SP, 3);
+ PUSHs(sv_2mortal(newRV_inc(sv)));
+ PUSHs(mg->mg_obj ? mg->mg_obj : &PL_sv_undef);
if (SvTYPE(sv) == SVt_PVAV) {
- XPUSHs(sv_2mortal(newSViv(av_len((AV *) sv) + 1)));
+ len = av_len((AV *) sv) + 1;
+ mPUSHi(len);
+ } else {
+ len = 1;
+ PUSHs(&PL_sv_undef);
}
PUTBACK;
SPAGAIN;
if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
- ret = POPi;
+ svr = POPs;
+ ret = SvOK(svr) ? SvUV(svr) : len;
PUTBACK;
}
STATIC int vmg_svt_clear(pTHX_ SV *sv, MAGIC *mg) {
- return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
+ return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_clear, sv, mg->mg_obj);
}
STATIC int vmg_svt_free(pTHX_ SV *sv, MAGIC *mg) {
/* So that it can survive tmp cleanup in vmg_cb_call */
- if (SvREFCNT(sv) <= 0) { SvREFCNT_inc(sv); }
+ SvREFCNT_inc(sv);
/* Perl_mg_free will get rid of the magic and decrement mg->mg_obj and
* mg->mg_ptr reference count */
- return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
+ return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_free, sv, mg->mg_obj);
+}
+
+#if MGf_COPY
+STATIC int vmg_svt_copy(pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *key,
+# if (VMG_PERL_PATCHLEVEL >= 33256) || (!VMG_PERL_PATCHLEVEL && PERL_API_VERSION_GE(5, 11, 0))
+ I32 keylen
+# else
+ int keylen
+# endif
+ ) {
+ SV *keysv;
+ int ret;
+
+ if (keylen == HEf_SVKEY) {
+ keysv = (SV *) key;
+ } else {
+ keysv = newSVpvn(key, keylen);
+ }
+
+ ret = vmg_cb_call3(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, keysv, nsv);
+
+ if (keylen != HEf_SVKEY) {
+ SvREFCNT_dec(keysv);
+ }
+
+ return ret;
+}
+#endif /* MGf_COPY */
+
+#if 0 /* MGf_DUP */
+STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param) {
+ return 0;
+}
+#endif /* MGf_DUP */
+
+#if MGf_LOCAL
+STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
+ return vmg_cb_call1(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
}
+#endif /* MGf_LOCAL */
+
+#if VMG_UVAR
+STATIC I32 vmg_svt_val(pTHX_ IV action, SV *sv) {
+ struct ufuncs *uf;
+ MAGIC *mg;
+ SV *key = NULL;
+
+ mg = mg_find(sv, PERL_MAGIC_uvar);
+ /* mg can't be NULL or we wouldn't be there. */
+ key = mg->mg_obj;
+ uf = (struct ufuncs *) mg->mg_ptr;
+
+ if (uf[1].uf_val != NULL) { uf[1].uf_val(aTHX_ action, sv); }
+ if (uf[1].uf_set != NULL) { uf[1].uf_set(aTHX_ action, sv); }
+
+ action &= HV_FETCH_ISSTORE | HV_FETCH_ISEXISTS | HV_FETCH_LVALUE | HV_DELETE;
+ for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+ MGWIZ *w;
+ if ((mg->mg_type != PERL_MAGIC_ext)
+ || (mg->mg_private < SIG_MIN)
+ || (mg->mg_private > SIG_MAX)) { continue; }
+ w = SV2MGWIZ(mg->mg_ptr);
+ if (!w->uvar) { continue; }
+ switch (action) {
+ case 0:
+ if (w->cb_fetch) { vmg_cb_call2(w->cb_fetch, sv, mg->mg_obj, key); }
+ break;
+ case HV_FETCH_ISSTORE:
+ case HV_FETCH_LVALUE:
+ case (HV_FETCH_ISSTORE|HV_FETCH_LVALUE):
+ if (w->cb_store) { vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
+ break;
+ case HV_FETCH_ISEXISTS:
+ if (w->cb_exists) { vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key); }
+ break;
+ case HV_DELETE:
+ if (w->cb_delete) { vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key); }
+ break;
+ }
+ }
+
+ return 0;
+}
+#endif /* VMG_UVAR */
/* ... Wizard destructor ................................................... */
STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
- MGWIZ *w = SV2MGWIZ(wiz);
+ char buf[8];
+ MGWIZ *w;
+ dMY_CXT;
+
+ w = SV2MGWIZ(wiz);
+
+ SvREFCNT_inc(wiz); /* Fake survival - it's gonna be deleted anyway */
+#if PERL_API_VERSION_GE(5, 9, 5)
+ SvREFCNT_inc(wiz); /* One more push */
+#endif
+ if (hv_delete(MY_CXT.wizz, buf, sprintf(buf, "%u", w->sig), 0)) {
+ --MY_CXT.count;
+ }
+ if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
if (w->cb_get != NULL) { SvREFCNT_dec(SvRV(w->cb_get)); }
if (w->cb_set != NULL) { SvREFCNT_dec(SvRV(w->cb_set)); }
if (w->cb_len != NULL) { SvREFCNT_dec(SvRV(w->cb_len)); }
if (w->cb_clear != NULL) { SvREFCNT_dec(SvRV(w->cb_clear)); }
if (w->cb_free != NULL) { SvREFCNT_dec(SvRV(w->cb_free)); }
- if (w->cb_data != NULL) { SvREFCNT_dec(SvRV(w->cb_data)); }
+#if MGf_COPY
+ if (w->cb_copy != NULL) { SvREFCNT_dec(SvRV(w->cb_copy)); }
+#endif /* MGf_COPY */
+#if MGf_DUP
+ if (w->cb_dup != NULL) { SvREFCNT_dec(SvRV(w->cb_dup)); }
+#endif /* MGf_DUP */
+#if MGf_LOCAL
+ if (w->cb_local != NULL) { SvREFCNT_dec(SvRV(w->cb_local)); }
+#endif /* MGf_LOCAL */
+#if VMG_UVAR
+ if (w->cb_fetch != NULL) { SvREFCNT_dec(SvRV(w->cb_fetch)); }
+ if (w->cb_store != NULL) { SvREFCNT_dec(SvRV(w->cb_store)); }
+ if (w->cb_exists != NULL) { SvREFCNT_dec(SvRV(w->cb_exists)); }
+ if (w->cb_delete != NULL) { SvREFCNT_dec(SvRV(w->cb_delete)); }
+#endif /* VMG_UVAR */
Safefree(w->vtbl);
Safefree(w);
NULL, /* len */
NULL, /* clear */
vmg_wizard_free, /* free */
-#ifdef MGf_COPY
+#if MGf_COPY
NULL, /* copy */
#endif /* MGf_COPY */
-#ifdef MGf_DUP
+#if MGf_DUP
NULL, /* dup */
#endif /* MGf_DUP */
+#if MGf_LOCAL
+ NULL, /* local */
+#endif /* MGf_LOCAL */
};
-STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
-STATIC const char vmg_invalid_sv[] = "Invalid variable";
-STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
+STATIC const char vmg_invalid_wiz[] = "Invalid wizard object";
+STATIC const char vmg_invalid_sv[] = "Invalid variable";
+STATIC const char vmg_invalid_sig[] = "Invalid numeric signature";
+STATIC const char vmg_wrongargnum[] = "Wrong number of arguments";
+STATIC const char vmg_toomanysigs[] = "Too many magic signatures used";
+STATIC const char vmg_argstorefailed[] = "Error while storing arguments";
+
+STATIC U16 vmg_sv2sig(pTHX_ SV *sv) {
+#define vmg_sv2sig(S) vmg_sv2sig(aTHX_ (S))
+ U16 sig;
+
+ if (SvIOK(sv)) {
+ sig = SvUVX(sv);
+ } else if (SvNOK(sv)) {
+ sig = SvNVX(sv);
+ } else if ((SvPOK(sv) && grok_number(SvPVX(sv), SvCUR(sv), NULL))) {
+ sig = SvUV(sv);
+ } else {
+ croak(vmg_invalid_sig);
+ }
+ if (sig < SIG_MIN) { sig += SIG_MIN; }
+ if (sig > SIG_MAX) { sig %= SIG_MAX + 1; }
+
+ return sig;
+}
+
+#define VMG_SET_CB(S, N) \
+ cb = (S); \
+ w->cb_ ## N = (SvOK(cb) && SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
+
+#define VMG_SET_SVT_CB(S, N) \
+ cb = (S); \
+ if (SvOK(cb) && SvROK(cb)) { \
+ t->svt_ ## N = vmg_svt_ ## N; \
+ w->cb_ ## N = newRV_inc(SvRV(cb)); \
+ } else { \
+ t->svt_ ## N = NULL; \
+ w->cb_ ## N = NULL; \
+ }
+
/* --- XS ------------------------------------------------------------------ */
PROTOTYPES: ENABLE
-SV *_wizard(SV *sig, SV *cb_get, SV *cb_set, SV *cb_len, SV *cb_clear, SV *cb_free, SV *cb_data)
-PROTOTYPE: $&&&&&
+BOOT:
+{
+ HV *stash;
+ MY_CXT_INIT;
+ MY_CXT.wizz = newHV();
+ MY_CXT.count = 0;
+ stash = gv_stashpv(__PACKAGE__, 1);
+ newCONSTSUB(stash, "SIG_MIN", newSVuv(SIG_MIN));
+ newCONSTSUB(stash, "SIG_MAX", newSVuv(SIG_MAX));
+ newCONSTSUB(stash, "SIG_NBR", newSVuv(SIG_NBR));
+ newCONSTSUB(stash, "MGf_COPY", newSVuv(MGf_COPY));
+ newCONSTSUB(stash, "MGf_DUP", newSVuv(MGf_DUP));
+ newCONSTSUB(stash, "MGf_LOCAL", newSVuv(MGf_LOCAL));
+ newCONSTSUB(stash, "VMG_UVAR", newSVuv(VMG_UVAR));
+ newCONSTSUB(stash, "VMG_COMPAT_ARRAY_PUSH_NOLEN",
+ newSVuv(VMG_COMPAT_ARRAY_PUSH_NOLEN));
+ newCONSTSUB(stash, "VMG_COMPAT_ARRAY_UNDEF_CLEAR",
+ newSVuv(VMG_COMPAT_ARRAY_UNDEF_CLEAR));
+ newCONSTSUB(stash, "VMG_COMPAT_SCALAR_LENGTH_NOLEN",
+ newSVuv(VMG_COMPAT_SCALAR_LENGTH_NOLEN));
+}
+
+SV *_wizard(...)
+PROTOTYPE: DISABLE
PREINIT:
+ I32 i = 0;
+ U16 sig;
+ char buf[8];
MGWIZ *w;
MGVTBL *t;
MAGIC *mg;
SV *sv;
+ SV *svsig;
+ SV *cb;
CODE:
- if (!SvIOK(sig)) { croak(vmg_invalid_sig); }
+ dMY_CXT;
+
+ if (items != 7
+#if MGf_COPY
+ + 1
+#endif /* MGf_COPY */
+#if MGf_DUP
+ + 1
+#endif /* MGf_DUP */
+#if MGf_LOCAL
+ + 1
+#endif /* MGf_LOCAL */
+#if VMG_UVAR
+ + 4
+#endif /* VMG_UVAR */
+ ) { croak(vmg_wrongargnum); }
+
+ svsig = ST(i++);
+ if (SvOK(svsig)) {
+ SV **old;
+ sig = vmg_sv2sig(svsig);
+ if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
+ ST(0) = sv_2mortal(newRV_inc(*old));
+ XSRETURN(1);
+ }
+ } else {
+ if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
+ sig = vmg_gensig();
+ }
Newx(t, 1, MGVTBL);
- t->svt_get = (SvOK(cb_get)) ? vmg_svt_get : NULL;
- t->svt_set = (SvOK(cb_set)) ? vmg_svt_set : NULL;
- t->svt_len = (SvOK(cb_len)) ? vmg_svt_len : NULL;
- t->svt_clear = (SvOK(cb_clear)) ? vmg_svt_clear : NULL;
- t->svt_free = (SvOK(cb_free)) ? vmg_svt_free : NULL;
-#ifdef MGf_COPY
- t->svt_copy = NULL;
+ Newx(w, 1, MGWIZ);
+
+ VMG_SET_CB(ST(i++), data);
+ VMG_SET_SVT_CB(ST(i++), get);
+ VMG_SET_SVT_CB(ST(i++), set);
+ VMG_SET_SVT_CB(ST(i++), len);
+ VMG_SET_SVT_CB(ST(i++), clear);
+ VMG_SET_SVT_CB(ST(i++), free);
+#if MGf_COPY
+ VMG_SET_SVT_CB(ST(i++), copy);
#endif /* MGf_COPY */
-#ifdef MGf_DUP
- t->svt_dup = NULL;
+#if MGf_DUP
+ /* VMG_SET_SVT_CB(ST(i++), dup); */
+ i++;
+ t->svt_dup = NULL;
+ w->cb_dup = NULL;
#endif /* MGf_DUP */
+#if MGf_LOCAL
+ VMG_SET_SVT_CB(ST(i++), local);
+#endif /* MGf_LOCAL */
+#if VMG_UVAR
+ VMG_SET_CB(ST(i++), fetch);
+ VMG_SET_CB(ST(i++), store);
+ VMG_SET_CB(ST(i++), exists);
+ VMG_SET_CB(ST(i++), delete);
+#endif /* VMG_UVAR */
- Newx(w, 1, MGWIZ);
w->vtbl = t;
- w->sig = SvUVX(sig);
- w->cb_get = (SvROK(cb_get)) ? newRV_inc(SvRV(cb_get)) : NULL;
- w->cb_set = (SvROK(cb_set)) ? newRV_inc(SvRV(cb_set)) : NULL;
- w->cb_len = (SvROK(cb_len)) ? newRV_inc(SvRV(cb_len)) : NULL;
- w->cb_clear = (SvROK(cb_clear)) ? newRV_inc(SvRV(cb_clear)) : NULL;
- w->cb_free = (SvROK(cb_free)) ? newRV_inc(SvRV(cb_free)) : NULL;
- w->cb_data = (SvROK(cb_data)) ? newRV_inc(SvRV(cb_data)) : NULL;
+ w->sig = sig;
+#if VMG_UVAR
+ w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
+#endif /* VMG_UVAR */
sv = MGWIZ2SV(w);
mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, -1);
mg->mg_private = SIG_WIZ;
+ hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
+ ++MY_CXT.count;
+
RETVAL = newRV_noinc(sv);
OUTPUT:
RETVAL
+SV *gensig()
+PROTOTYPE:
+CODE:
+ dMY_CXT;
+ if (MY_CXT.count >= SIG_NBR) { croak(vmg_toomanysigs); }
+ RETVAL = newSVuv(vmg_gensig());
+OUTPUT:
+ RETVAL
+
SV *getsig(SV *wiz)
PROTOTYPE: $
CODE:
OUTPUT:
RETVAL
-SV *cast(SV *sv, SV *wiz)
-PROTOTYPE: \[$@%&*]$
+SV *cast(SV *sv, SV *wiz, ...)
+PROTOTYPE: \[$@%&*]$@
+PREINIT:
+ AV *args = NULL;
+ SV *ret;
CODE:
- if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
- RETVAL = newSVuv(vmg_cast(SvRV(sv), SvRV(wiz)));
+ dMY_CXT;
+ if (SvROK(wiz)) {
+ wiz = SvRV(wiz);
+ } else if (SvOK(wiz)) {
+ char buf[8];
+ SV **old;
+ U16 sig = vmg_sv2sig(wiz);
+ if ((old = hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0))) {
+ wiz = *old;
+ } else {
+ XSRETURN_UNDEF;
+ }
+ } else {
+ croak(vmg_invalid_sig);
+ }
+ if (items > 2) {
+ I32 i;
+ args = newAV();
+ av_fill(args, items - 2);
+ for (i = 2; i < items; ++i) {
+ SV *arg = ST(i);
+ SvREFCNT_inc(arg);
+ if (av_store(args, i - 2, arg) == NULL) { croak(vmg_argstorefailed); }
+ }
+ }
+ ret = newSVuv(vmg_cast(SvRV(sv), wiz, args));
+ SvREFCNT_dec(args);
+ RETVAL = ret;
OUTPUT:
RETVAL
PROTOTYPE: \[$@%&*]$
PREINIT:
SV *data;
+ U16 sig;
CODE:
- if (!SvROK(wiz)) { croak(vmg_invalid_wiz); }
- data = vmg_data_get(SvRV(sv), SV2MGWIZ(SvRV(wiz))->sig);
+ dMY_CXT;
+ if (SvROK(wiz)) {
+ sig = SV2MGWIZ(SvRV(wiz))->sig;
+ } else if (SvOK(wiz)) {
+ char buf[8];
+ sig = vmg_sv2sig(wiz);
+ if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
+ XSRETURN_UNDEF;
+ }
+ } else {
+ croak(vmg_invalid_wiz);
+ }
+ data = vmg_data_get(SvRV(sv), sig);
if (!data) { XSRETURN_UNDEF; }
- ST(0) = newSVsv(data);
+ ST(0) = data;
XSRETURN(1);
SV *dispell(SV *sv, SV *wiz)
PREINIT:
U16 sig;
CODE:
+ dMY_CXT;
if (SvROK(wiz)) {
sig = SV2MGWIZ(SvRV(wiz))->sig;
- } else if (SvIOK(wiz)) {
- sig = SvUVX(wiz);
+ } else if (SvOK(wiz)) {
+ char buf[8];
+ sig = vmg_sv2sig(wiz);
+ if (!hv_fetch(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), 0)) {
+ XSRETURN_UNDEF;
+ }
} else {
croak(vmg_invalid_wiz);
}
projects / perl / modules / Variable-Magic.git / blobdiff