/* This file is part of the Variable::Magic Perl module.
* See http://search.cpan.org/dist/Variable-Magic/ */
-#include <stdlib.h> /* rand(), RAND_MAX */
#include <stdio.h> /* sprintf() */
#define PERL_NO_GET_CONTEXT
#define R(S) fprintf(stderr, "R(" #S ") = %d\n", SvREFCNT(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))))))
+
/* --- Compatibility ------------------------------------------------------- */
#ifndef Newx
# define MY_CXT_INIT
#endif
+#ifndef PERL_MAGIC_ext
+# define PERL_MAGIC_ext '~'
+#endif
+
+#ifndef MGf_COPY
+# define MGf_COPY 0
+#endif /* !MGf_COPY */
+
+#ifndef MGf_DUP
+# define MGf_DUP 0
+#endif /* !MGf_DUP */
+
+#ifndef MGf_LOCAL
+# define MGf_LOCAL 0
+#endif /* !MGf_LOCAL */
+
/* --- Context-safe global data -------------------------------------------- */
#define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
dMY_CXT;
do {
- double u = rand() / (RAND_MAX + 1.0);
- sig = SIG_NBR * u + SIG_MIN;
+ sig = SIG_NBR * Drand01() + SIG_MIN;
} while (hv_exists(MY_CXT.wizz, buf, sprintf(buf, "%u", sig)));
return sig;
typedef struct {
MGVTBL *vtbl;
U16 sig;
- SV *cb_get, *cb_set, *cb_len, *cb_clear, *cb_free, *cb_data;
+ int 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 */
+ SV *cb_fetch, *cb_store, *cb_exists, *cb_delete;
} MGWIZ;
#define MGWIZ2SV(W) (newSVuv(PTR2UV(W)))
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;
/* ... Magic cast/dispell .................................................. */
+STATIC I32 vmg_uf_val(pTHX_ IV idx, SV *sv);
+
STATIC UV vmg_cast(pTHX_ SV *sv, SV *wiz, AV *args) {
#define vmg_cast(S, W, A) vmg_cast(aTHX_ (S), (W), (A))
+ int has_uvar = 0;
MAGIC *mg = NULL, *moremagic = NULL;
MGWIZ *w;
SV *data;
w = SV2MGWIZ(wiz);
- if (SvTYPE(sv) >= SVt_PVMG) {
- for (mg = SvMAGIC(sv); mg; mg = moremagic) {
- moremagic = mg->mg_moremagic;
- if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break; }
- }
+ if ((SvTYPE(sv) >= SVt_PVMG) && (mg = SvMAGIC(sv))) {
+ if (mg->mg_type == PERL_MAGIC_uvar) { has_uvar = 1; }
+ do {
+ if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_private == w->sig)) { break;}
+ mg = mg->mg_moremagic;
+ } while (mg);
if (mg) { return 1; }
}
+ if (w->uvar && (SvTYPE(sv) >= SVt_PVHV) && !has_uvar) {
+ struct ufuncs uf;
+ uf.uf_val = vmg_uf_val;
+ uf.uf_set = NULL;
+ uf.uf_index = 0;
+ sv_magicext(sv, NULL, PERL_MAGIC_uvar, &PL_vtbl_uvar, (char *) &uf, sizeof(uf));
+ }
+
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 = sv_magicext(sv, data, PERL_MAGIC_ext, w->vtbl, (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 */
+ ;
return 1;
}
return ret;
}
+STATIC int vmg_cb_call2(pTHX_ SV *cb, SV *sv, SV *data, SV *extra) {
+#define vmg_cb_call2(I, S, D, E) vmg_cb_call2(aTHX_ (I), (S), (D), (E))
+ int ret;
+
+ dSP;
+ int count;
+
+ ENTER;
+ SAVETMPS;
+
+ PUSHMARK(SP);
+ XPUSHs(sv_2mortal(newRV_inc(sv)));
+ XPUSHs(data ? data : &PL_sv_undef);
+ if (extra) { XPUSHs(extra); }
+ PUTBACK;
+
+ count = call_sv(cb, G_SCALAR);
+
+ SPAGAIN;
+
+ if (count != 1) { croak("Callback needs to return 1 scalar\n"); }
+ ret = POPi;
+
+ PUTBACK;
+
+ FREETMPS;
+ LEAVE;
+
+ return ret;
+}
+
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_call(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 *name, int namelen) {
+ return vmg_cb_call2(SV2MGWIZ(mg->mg_ptr)->cb_copy, sv, mg->mg_obj, nsv);
+}
+#endif /* MGf_COPY */
+
+#if MGf_DUP
+STATIC int vmg_svt_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *p) {
+ return 0;
+}
+#endif /* MGf_DUP */
+
+#if MGf_LOCAL
+STATIC int vmg_svt_local(pTHX_ SV *nsv, MAGIC *mg) {
+ return vmg_cb_call(SV2MGWIZ(mg->mg_ptr)->cb_local, nsv, mg->mg_obj);
+}
+#endif /* MGf_LOCAL */
+
+STATIC I32 vmg_uf_val(pTHX_ IV idx, SV *sv) {
+ MAGIC *mg;
+ SV *key;
+ for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+ if (mg->mg_type == PERL_MAGIC_uvar) { key = mg->mg_obj; break; }
+ }
+ if (!key) { return 0; }
+ 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 (idx & (HV_FETCH_ISSTORE|HV_FETCH_ISEXISTS|HV_FETCH_LVALUE|HV_DELETE)){
+ case 0:
+ if (w->cb_fetch) { return 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) { return vmg_cb_call2(w->cb_store, sv, mg->mg_obj, key); }
+ break;
+ case HV_FETCH_ISEXISTS:
+ if (w->cb_exists) { return vmg_cb_call2(w->cb_exists, sv, mg->mg_obj, key);}
+ break;
+ case HV_DELETE:
+ if (w->cb_delete) { return vmg_cb_call2(w->cb_delete, sv, mg->mg_obj, key);}
+ break;
+ }
+ }
+ return 0;
+}
+
/* ... Wizard destructor ................................................... */
STATIC int vmg_wizard_free(pTHX_ SV *wiz, MAGIC *mg) {
w = SV2MGWIZ(wiz);
SvREFCNT_inc(wiz); /* Fake survival - it's gonna be deleted anyway */
-#if PERL_API_REVISION > 5 || (PERL_API_REVISION == 5 && (PERL_API_VERSION > 9 || (PERL_API_VERSION == 9 && PERL_API_SUBVERSION >= 5)))
+#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 (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)); }
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 */
};
+/* --- Error messages and misc helpers ------------------------------------- */
+
+STATIC const char vmg__wizard_args[] = "_wizard() called with a wrong number of arguments - use wizard() instead";
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";
return sig;
}
+#define VMG_SET_CB(T, M, CB) \
+ cb = (CB); \
+ (M)->cb_##T = (SvROK(cb)) ? newRV_inc(SvRV(cb)) : NULL;
+
+#define VMG_SET_CB_SVT(T, V, M, CB) \
+ cb = (CB); \
+ if (SvROK(cb)) { \
+ (V)->svt_##T = vmg_svt_##T; (M)->cb_##T = newRV_inc(SvRV(cb)); \
+ } else { \
+ (V)->svt_##T = NULL; (M)->cb_##T = NULL; \
+ }
+
/* --- XS ------------------------------------------------------------------ */
MODULE = Variable::Magic PACKAGE = Variable::Magic
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, "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));
}
-SV *_wizard(SV *svsig, SV *cb_get, SV *cb_set, SV *cb_len, SV *cb_clear, SV *cb_free, SV *cb_data)
-PROTOTYPE: $&&&&&&
+SV *_wizard(SV *svsig, ...)
+PROTOTYPE: $@
PREINIT:
U16 sig;
+ I32 i;
char buf[8];
MGWIZ *w;
MGVTBL *t;
MAGIC *mg;
- SV *sv;
+ SV *cb, *sv;
CODE:
dMY_CXT;
+
+ if (items != 14) { croak(vmg__wizard_args); }
+
if (SvOK(svsig)) {
SV **old;
sig = vmg_sv2sig(svsig);
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;
-#endif /* MGf_COPY */
-#ifdef MGf_DUP
- t->svt_dup = NULL;
-#endif /* MGf_DUP */
+ Newx(t, 1, MGVTBL);
Newx(w, 1, MGWIZ);
w->vtbl = t;
w->sig = 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;
+
+ VMG_SET_CB(data, w, ST(1));
+ VMG_SET_CB_SVT(get, t, w, ST(2));
+ VMG_SET_CB_SVT(set, t, w, ST(3));
+ VMG_SET_CB_SVT(len, t, w, ST(4));
+ VMG_SET_CB_SVT(clear, t, w, ST(5));
+ VMG_SET_CB_SVT(free, t, w, ST(6));
+#if MGf_COPY
+ VMG_SET_CB_SVT(copy, t, w, ST(7));
+#endif /* MGf_COPY */
+#if MGf_DUP
+ VMG_SET_CB_SVT(dup, t, w, ST(8));
+#endif /* MGf_DUP */
+#if MGf_LOCAL
+ VMG_SET_CB_SVT(local, t, w, ST(9));
+#endif /* MGf_LOCAL */
+ VMG_SET_CB(fetch, w, ST(10));
+ VMG_SET_CB(store, w, ST(11));
+ VMG_SET_CB(exists, w, ST(12));
+ VMG_SET_CB(delete, w, ST(13));
+
+ w->uvar = (w->cb_fetch || w->cb_store || w->cb_exists || w->cb_delete);
sv = MGWIZ2SV(w);
mg = sv_magicext(sv, NULL, PERL_MAGIC_ext, &vmg_wizard_vtbl, NULL, -1);
mg->mg_private = SIG_WIZ;
+#if MGf_COPY
+ if (t->svt_copy) { mg->mg_flags |= MGf_COPY; }
+#endif /* MGf_COPY */
+#if MGf_DUP
+ if (t->svt_dup) { mg->mg_flags |= MGf_DUP; }
+#endif /* MGf_DUP */
+#if MGf_LOCAL
+ if (t->svt_local) { mg->mg_flags |= MGf_LOCAL; }
+#endif /* MGf_LOCAL */
hv_store(MY_CXT.wizz, buf, sprintf(buf, "%u", sig), sv, 0);
++MY_CXT.count;
projects / perl / modules / Variable-Magic.git / blobdiff