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PJS_PerlPackage.c
486 lines (443 loc) · 12.3 KB
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PJS_PerlPackage.c
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#include "JS.h"
extern JSClass perlhash_class;
extern JSClass perlarray_class;
extern JSClass perl_class;
static const char *PJS_EXPORT_PROP = "__export__";
static JSBool perlpackage_add(JSContext *cx, JSObject *obj, pjsid id, jsval *vp);
static JSBool perlpackage_set(JSContext *cx, JSObject *obj, pjsid id, DEFSTRICT_ jsval *vp);
static JSBool perlpackage_get(JSContext *cx, JSObject *obj, pjsid id, jsval *vp);
static JSBool perlpackage_resolve(JSContext *, JSObject *, pjsid, uintN, JSObject **);
#if !defined(gv_const_sv)
static SV *
Perl_gv_const_sv(pTHX_ GV *gv) {
if(SvTYPE(gv) == SVt_PVGV)
return cv_const_sv(GvCVu(gv));
return NULL;
}
#if !defined(PERL_IMPLICIT_CONTEXT)
#define gv_const_sv Perl_gv_const_sv
#else
#define gv_const_sv(a) Perl_gv_const_sv(aTHX_ a)
#endif
#endif
JSClass perlpackage_class = {
PJS_PACKAGE_CLASS_NAME,
JSCLASS_HAS_PRIVATE /* Must be wrapped */
| JSCLASS_NEW_RESOLVE | JSCLASS_HAS_RESERVED_SLOTS(1),
perlpackage_add, JS_PropertyStub, perlpackage_get, perlpackage_set,
JS_EnumerateStub, (JSResolveOp)perlpackage_resolve,
JS_ConvertStub, PJS_unrootJSVis,
JSCLASS_NO_OPTIONAL_MEMBERS
};
static JSBool
perlpackage_add(
JSContext *cx,
JSObject *obj,
pjsid id,
jsval *vp
) {
dTHX;
SV *ref = (SV *)JS_GetInstancePrivate(cx, obj, &perlpackage_class, NULL);
char *key;
SV *sv;
jsval temp;
JSBool can, ok = JS_TRUE;
if(!PJSID_IS(STRING, id))
return JS_TRUE;
assert(ref != NULL);
#if JS_VERSION < 185
key = JS_GetStringBytes(PJSID_TO(STRING, id));
#else
JSAutoByteString bytes(cx, PJSID_TO(STRING, id));
key = bytes.ptr();
#endif
PJS_DEBUG1("In PC add for '%s'\n", key);
if(*key == '$' || JSVAL_IS_VOID(*vp) || JSVAL_IS_NULL(*vp) ||
strEQ(key, PJS_EXPORT_PROP) || strEQ(key, PJS_PASSPORT_PROP))
return JS_TRUE;
if(!JS_GetProperty(cx, obj, PJS_EXPORT_PROP, &temp) ||
!JS_ValueToBoolean(cx, temp, &can))
return JS_FALSE;
/* Vetoed */
if(!can) return JS_TRUE;
ENTER; SAVETMPS;
PJS_DEBUG2("Want add '%s' in '%s'\n", key, HvNAME((HV *)SvRV(ref)));
if(!PJS_ReflectJS2Perl(aTHX_ cx, *vp, &sv, 0))
ok = JS_FALSE;
if(ok && sv_isobject(sv_2mortal(sv)) && sv_derived_from(sv, PJS_OBJECT_PACKAGE)) {
SV *res = PJS_CallPerlMethod(aTHX_ cx,
"__bind_to_stash",
sv,
sv_2mortal(newSVpv(HvNAME((HV *)SvRV(ref)) ,0)),
sv_2mortal(newSVpv(key,0)),
NULL
);
if(!res || !SvTRUE(res))
ok = JS_FALSE;
}
FREETMPS; LEAVE;
return ok;
}
static char* form_name(const char *package, const char *key) {
char *name;
New(1, name, strlen(package)+strlen(key)+2, char);
if(name) {
strcpy(name, package);
strcat(name, "::");
strcat(name, key+1); // skip sigil
}
return name;
}
static JSBool perlpackage_set(
JSContext *cx,
JSObject *obj,
pjsid id,
DEFSTRICT_
jsval *vp
) {
dTHX;
SV *ref = (SV *)JS_GetInstancePrivate(cx, obj, &perlpackage_class, NULL);
const char *key;
const char *package;
jsval temp;
JSBool can;
if(!PJSID_IS(STRING, id))
return JS_TRUE;
assert(ref != NULL);
#if JS_VERSION < 185
key = JS_GetStringBytes(PJSID_TO(STRING, id));
#else
JSAutoByteString bytes(cx, PJSID_TO(STRING, id));
key = bytes.ptr();
#endif
package = HvNAME((HV *)SvRV(ref));
if(*key == '$') {
/* Don't want to allow @ nor % yet, to much dangerous */
char *name;
SV *nsv;
SV *sv;
if(JS_GetProperty(cx, obj, PJS_EXPORT_PROP, &temp) &&
JS_ValueToBoolean(cx, temp, &can) && !can)
return JS_TRUE; /* Export vetoed */
if(!PJS_ReflectJS2Perl(aTHX_ cx, *vp, &nsv, 1))
return JS_FALSE;
name = form_name(package, key);
PJS_DEBUG1("In PCS set for $%s\n", name);
sv = get_sv(name, GV_ADD | GV_ADDMULTI);
Safefree(name);
SvSetMagicSV(sv, nsv);
}
return JS_TRUE;
}
static JSBool perlpackage_get(
JSContext *cx,
JSObject *obj,
pjsid id,
jsval *vp
) {
dTHX;
SV *ref = NULL;
const char *key;
const char *package;
if(!PJSID_IS(STRING, id))
return JS_TRUE;
while(obj) {
ref = (SV *)JS_GetInstancePrivate(cx, obj, &perlpackage_class, NULL);
if(ref) break;
obj = JS_GetPrototype(cx, obj);
}
if(!ref) return JS_TRUE;
#if JS_VERSION < 185
key = JS_GetStringBytes(PJSID_TO(STRING, id));
#else
JSAutoByteString bytes(cx, PJSID_TO(STRING, id));
key = bytes.ptr();
#endif
package = HvNAME((HV *)SvRV(ref));
if(*key == '$') {
char *name = form_name(package, key);
SV *sv = get_sv(name, 0);
PJS_DEBUG1("In PCS get for $%s\n", name);
Safefree(name);
if(sv) return PJS_ReflectPerl2JS(aTHX_ cx, obj, sv, vp);
}
return JS_TRUE;
}
static JSBool perlpackage_resolve(
JSContext *cx,
JSObject *obj,
pjsid id,
uintN flags,
JSObject **objp
) {
dTHX;
SV *ref = (SV *)JS_GetInstancePrivate(cx, obj, &perlpackage_class, NULL);
const char *key;
const char *package;
HV *stash;
GV *gv;
SV *sv = NULL;
jsval temp;
JSBool ok = TRUE;
if(!PJSID_IS(STRING, id))
return JS_TRUE;
#if JS_VERSION < 185
key = JS_GetStringBytes(PJSID_TO(STRING, id));
#else
JSAutoByteString bytes(cx, PJSID_TO(STRING, id));
key = bytes.ptr();
#endif
if(strEQ(key, PJS_PASSPORT_PROP)) {
*objp = obj;
return JS_TRUE;
}
stash = (HV *)SvRV(ref);
package = HvNAME(stash);
PJS_DEBUG2("In PCS resolve for %s::%s\n", package, key);
switch(*key) {
AV *av; HV *hv; CV *cv; char *name;
case '%':
name = form_name(package, key);
hv = get_hv(name, 0);
if(hv && HvARRAY(hv)) {
PJS_DEBUG1("Hash %s found\n", name);
sv = newRV((SV *)hv);
}
Safefree(name);
break;
case '@':
name = form_name(package, key);
av = get_av(name, 0);
if(av && AvMAX(av) >= 0) {
PJS_DEBUG1("Array %s found\n", name);
sv = newRV((SV *)av);
}
Safefree(name);
break;
case '&':
name = form_name(package, key);
cv = get_cv(name, 0);
if(cv && (CvROOT(cv) || CvXSUB(sv))) {
PJS_DEBUG1("Sub %s found\n", name);
sv = newRV((SV *)cv);
}
Safefree(name);
break;
case '$':
name = form_name(package, key);
sv = get_sv(name, 0);
// if(sv && SvOK(sv)) PJS_DEBUG1("Scalar %s found\n", name);
Safefree(name);
/* Make property defined, but lets getter do its work */
if(sv || (flags & JSRESOLVE_DECLARING)) {
if(JS_DefineProperty(cx, obj, key, JSVAL_VOID, NULL, NULL, 0)) {
*objp = obj;
return JS_TRUE;
}
return JS_FALSE;
}
}
if(!sv && PJS_getFlag(PJS_GET_CONTEXT(cx), "ConstantsValue")) {
GV **gvp;
gvp = (GV**)hv_fetch(stash, key, strlen(key), 0);
if(gvp && *gvp != (GV*)&PL_sv_undef)
sv = gv_const_sv(*gvp);
}
if(sv) {
if(PJS_ReflectPerl2JS(aTHX_ cx, obj, sv, &temp) &&
JS_DefineProperty(cx, obj, key, temp, NULL, NULL, 0)
)
*objp = obj;
else ok = JS_FALSE;
sv_free(sv);
return ok;
}
/* Now try method resolution */
gv = gv_fetchmeth(stash, key, strlen(key), 0);
if(gv) {
PJS_DEBUG("Method found\n");
// TODO: Make method resolution dynamic
if(PJS_ReflectPerl2JS(aTHX_ cx, obj,
(sv = newRV_inc((SV *)GvCV(gv))), &temp) &&
JS_DefineProperty(cx, obj, key, temp, NULL, NULL, 0))
*objp = obj;
else ok = JS_FALSE;
sv_free(sv);
}
return JS_TRUE;
}
static JSBool
perlpackage_eget(
JSContext *cx,
JSObject *obj,
pjsid id,
jsval *vp
) {
dTHX;
SV *ref = (SV *)JS_GetInstancePrivate(cx, obj, &perlpackage_class, NULL);
const char *package = HvNAME((HV *)SvRV(ref));
#if JS_VERSION < 185
char *key = JS_GetStringBytes(PJSID_TO(STRING, id));
#else
JSAutoByteString bytes(cx, PJSID_TO(STRING, id));
char *key = bytes.ptr();
#endif
if(strEQ(key, PJS_EXPORT_PROP)) {
char *name = form_name(package, "__allow_js_export");
SV *sv = get_sv(name, 0);
Safefree(name);
*vp = (sv && SvOK(sv) && SvTRUE(sv)) ? JSVAL_TRUE : JSVAL_FALSE;
}
return JS_TRUE;
}
JSObject *
PJS_GetPackageObject(
pTHX_
JSContext *cx,
const char *package
) {
JSObject *scope = JS_GetGlobalObject(cx);
if(scope) {
jsval temp = JSVAL_VOID;
JSObject *stashes;
if(JS_LookupProperty(cx, scope, "__PERL__", &temp)
&& JSVAL_IS_OBJECT(temp)
&& (stashes = JSVAL_TO_OBJECT(temp))
&& PJS_GET_CLASS(cx, stashes) == &perl_class
) {
if(JS_LookupProperty(cx, stashes, package, &temp)) {
HV *stash;
JSObject *pkg;
if(JSVAL_IS_OBJECT(temp) &&
(PJS_GET_CLASS(cx, JSVAL_TO_OBJECT(temp)) == &perlpackage_class))
return JSVAL_TO_OBJECT(temp);
if(!JSVAL_IS_VOID(temp)) {
croak("OOPS! Garbage in controller!");
return NULL;
}
/* Must create */
stash = gv_stashpv(package, GV_ADD);
pkg = JS_NewObject(cx, &perlpackage_class, NULL, stashes);
if(pkg) {
JSObject *proto;
PJS_CreateJSVis(aTHX_ cx, pkg, newRV_noinc((SV *)stash));
if((proto = JS_NewObject(cx, NULL, pkg, scope)) &&
JS_DefineProperty(cx, pkg, PJS_PROXY_PROP,
OBJECT_TO_JSVAL(proto),
NULL, NULL, 0) &&
JS_DefineProperty(cx, stashes, package, OBJECT_TO_JSVAL(pkg),
NULL, NULL,
JSPROP_READONLY | JSPROP_PERMANENT | JSPROP_ENUMERATE) &&
JS_DefineProperty(cx, pkg, PJS_EXPORT_PROP,
JSVAL_VOID, perlpackage_eget, NULL,
JSPROP_READONLY | JSPROP_PERMANENT) &&
JS_DefineProperty(cx, pkg, PJS_PACKAGE_PROP,
STRING_TO_JSVAL(JS_InternString(cx, package)),
NULL, NULL, JSPROP_READONLY | JSPROP_PERMANENT) &&
JS_DefineProperty(cx, proto, "constructor", JSVAL_VOID,
NULL, perlsub_as_constructor, 0)
) return pkg;
else PJS_unrootJSVis(cx, pkg); /* Let GC do its work */
}
}
return NULL; /* Failed */
}
}
croak("Can't get my controller!\n");
return NULL;
}
char *
PJS_GetPackageName(pTHX_ JSContext *cx, JSObject *package)
{
SV *ref = (SV *)JS_GetInstancePrivate(cx, package, &perlpackage_class, NULL);
if(ref) return savepv(HvNAME((HV *)SvRV(ref)));
else {
jsval pkg;
if(JS_LookupProperty(cx, package, PJS_PACKAGE_PROP, &pkg) &&
JSVAL_IS_STRING(pkg)) {
#if JS_VERSION < 185
return JS_GetStringBytes(JSVAL_TO_STRING(pkg));
#else
char *pkgname = JS_EncodeString(cx, JSVAL_TO_STRING(pkg));
char *copy = savepv(pkgname);
JS_free(cx, pkgname);
return copy;
#endif
}
}
return NULL;
}
static JSBool perlobj_get(
JSContext *cx,
JSObject *obj,
pjsid id,
jsval *vp
) {
// dTHX;
SV *ref = (SV *)JS_GetPrivate(cx, obj);
SV *sv = SvRV(ref);
if(SvTYPE(sv) == SVt_PVHV)
return (perlhash_class.getProperty)(cx, obj, id, vp);
else if(SvTYPE(sv) == SVt_PVAV)
return (perlarray_class.getProperty)(cx, obj, id, vp);
return JS_TRUE;
}
static JSBool perlobj_set(
JSContext *cx,
JSObject *obj,
pjsid id,
DEFSTRICT_
jsval *vp
) {
dTHX;
SV *ref = (SV *)JS_GetPrivate(cx, obj);
SV *sv = SvRV(ref);
JSBool ok = TRUE;
if(SvTYPE(sv) == SVt_PVHV && PJSID_IS(STRING, id)) {
SV *svk;
ENTER; SAVETMPS;
svk = PJS_JSString2SV(aTHX_ cx, PJSID_TO(STRING, id));
sv_2mortal(svk);
if(hv_exists_ent((HV *)sv, svk, 0)) {
SV *nsv;
if(!PJS_ReflectJS2Perl(aTHX_ cx, *vp, &nsv, 1)) ok = JS_FALSE;
if(ok && hv_store_ent((HV *)sv, svk, nsv, 0) == NULL) {
if(SvSMAGICAL((HV *)sv)) mg_set(nsv);
else ok = JS_FALSE; // TODO: Check error to report
}
}
FREETMPS; LEAVE;
}
else if(SvTYPE(sv) == SVt_PVAV) {
return (perlarray_class.setProperty)(cx, obj, PASSTRICT_ id, vp);
}
return ok;
}
JSClass perlobj_class = {
"PerlObject", JSCLASS_PRIVATE_IS_PERL,
JS_PropertyStub, JS_PropertyStub, perlobj_get, perlobj_set,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, PJS_unrootJSVis,
JSCLASS_NO_OPTIONAL_MEMBERS
};
JSObject *
PJS_NewPerlObject(pTHX_ JSContext *cx, JSObject *parent, SV *objref)
{
JSObject *newobj = NULL;
char *stname = HvNAME(SvSTASH(SvRV(objref)));
JSObject *stash = PJS_GetPackageObject(aTHX_ cx, stname);
if(stash) {
JSClass *impl = &perlobj_class;
JSObject *proto = NULL;
jsval tmp;
JS_LookupProperty(cx, stash, PJS_PROXY_PROP, &tmp);
if(JSVAL_IS_OBJECT(tmp)) {
JSClass *cls = PJS_GET_CLASS(cx, proto = JSVAL_TO_OBJECT(tmp));
if(strNE(cls->name, "Object")) impl = cls;
PJS_DEBUG1("A new %s\n", impl->name);
}
else croak("Not an object!\n");
newobj = JS_NewObject(cx, impl, proto, parent);
return PJS_CreateJSVis(aTHX_ cx, newobj, objref);
}
return NULL;
}