static JSBool
FindConstructor(JSContext *cx, JSClass *clasp, jsval *vp)
{
JSAtom *atom;
JSObject *obj, *tmp;
JSBool ok;
PR_ASSERT(JS_IS_LOCKED(cx));
/* XXX pre-atomize in JS_InitClass! */
atom = js_Atomize(cx, clasp->name, strlen(clasp->name), 0);
if (!atom)
return JS_FALSE;
if (cx->fp && (tmp = cx->fp->scopeChain)) {
/* Find the topmost object in the scope chain. */
do {
obj = tmp;
tmp = OBJ_GET_PARENT(obj);
} while (tmp);
} else {
obj = cx->globalObject;
if (!obj) {
*vp = JSVAL_VOID;
return JS_TRUE;
}
}
ok = (js_GetProperty(cx, obj, (jsval)atom, vp) != NULL);
js_DropAtom(cx, atom);
return JS_TRUE;
}
void
js_TryMethod(JSContext *cx, JSObject *obj, JSAtom *atom,
uintN argc, jsval *argv, jsval *rval)
{
JSErrorReporter older;
JSProperty *prop;
jsval fval;
older = JS_SetErrorReporter(cx, NULL);
JS_LOCK_VOID(cx, prop = js_GetProperty(cx, obj, (jsval)atom, &fval));
if (prop &&
JSVAL_IS_OBJECT(fval) &&
fval != JSVAL_NULL) {
(void) js_Call(cx, obj, fval, argc, argv, rval);
}
JS_SetErrorReporter(cx, older);
}
PyObject*
Context_rem_global(Context* self, PyObject* args, PyObject* kwargs)
{
PyObject* pykey = NULL;
PyObject* ret = NULL;
jsval jsk;
jsid kid;
jsval jsv;
JS_BeginRequest(self->cx);
if(!PyArg_ParseTuple(args, "O", &pykey)) goto error;
jsk = py2js(self, pykey);
if(jsk == JSVAL_VOID) goto error;
if(!JS_ValueToId(self->cx, jsk, &kid))
{
PyErr_SetString(JSError, "Failed to create key id.");
}
if(!js_GetProperty(self->cx, self->root, kid, &jsv))
{
PyErr_SetString(JSError, "Failed to get global property.");
goto error;
}
ret = js2py(self, jsv);
if(ret == NULL) goto error;
if(!js_DeleteProperty(self->cx, self->root, kid, &jsv))
{
PyErr_SetString(JSError, "Failed to remove global property.");
goto error;
}
JS_MaybeGC(self->cx);
goto success;
error:
success:
JS_EndRequest(self->cx);
return ret;
}
JS_GetPropertyDesc(JSContext *cx, JSObject *obj, JSScopeProperty *sprop,
JSPropertyDesc *pd)
{
JSPropertyOp getter;
JSScope *scope;
JSScopeProperty *aprop;
jsval lastException;
JSBool wasThrowing;
pd->id = ID_TO_VALUE(sprop->id);
wasThrowing = cx->throwing;
if (wasThrowing) {
lastException = cx->exception;
if (JSVAL_IS_GCTHING(lastException) &&
!js_AddRoot(cx, &lastException, "lastException")) {
return JS_FALSE;
}
cx->throwing = JS_FALSE;
}
if (!js_GetProperty(cx, obj, sprop->id, &pd->value)) {
if (!cx->throwing) {
pd->flags = JSPD_ERROR;
pd->value = JSVAL_VOID;
} else {
pd->flags = JSPD_EXCEPTION;
pd->value = cx->exception;
}
} else {
pd->flags = 0;
}
cx->throwing = wasThrowing;
if (wasThrowing) {
cx->exception = lastException;
if (JSVAL_IS_GCTHING(lastException))
js_RemoveRoot(cx->runtime, &lastException);
}
getter = sprop->getter;
pd->flags |= ((sprop->attrs & JSPROP_ENUMERATE) ? JSPD_ENUMERATE : 0)
| ((sprop->attrs & JSPROP_READONLY) ? JSPD_READONLY : 0)
| ((sprop->attrs & JSPROP_PERMANENT) ? JSPD_PERMANENT : 0)
#if JS_HAS_CALL_OBJECT
| ((getter == js_GetCallVariable) ? JSPD_VARIABLE : 0)
#endif /* JS_HAS_CALL_OBJECT */
| ((getter == js_GetArgument) ? JSPD_ARGUMENT : 0)
| ((getter == js_GetLocalVariable) ? JSPD_VARIABLE : 0);
#if JS_HAS_CALL_OBJECT
/* for Call Object 'real' getter isn't passed in to us */
if (OBJ_GET_CLASS(cx, obj) == &js_CallClass &&
getter == js_CallClass.getProperty) {
/*
* Property of a heavyweight function's variable object having the
* class-default getter. It's either an argument if permanent, or a
* nested function if impermanent. Local variables have a special
* getter (js_GetCallVariable, tested above) and setter, and not the
* class default.
*/
pd->flags |= (sprop->attrs & JSPROP_PERMANENT)
? JSPD_ARGUMENT
: JSPD_VARIABLE;
}
#endif /* JS_HAS_CALL_OBJECT */
pd->spare = 0;
pd->slot = (pd->flags & (JSPD_ARGUMENT | JSPD_VARIABLE))
? sprop->shortid
: 0;
pd->alias = JSVAL_VOID;
scope = OBJ_SCOPE(obj);
if (SPROP_HAS_VALID_SLOT(sprop, scope)) {
for (aprop = SCOPE_LAST_PROP(scope); aprop; aprop = aprop->parent) {
if (aprop != sprop && aprop->slot == sprop->slot) {
pd->alias = ID_TO_VALUE(aprop->id);
break;
}
}
}
return JS_TRUE;
}
JSProperty *
js_SetProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
JSRuntime *rt;
JSScope *scope, *protoScope;
JSProperty *prop, *protoProp;
PRHashNumber hash;
JSSymbol *sym, *protoSym;
JSObject *proto, *assignobj;
jsval pval, aval, rval;
jsint slot;
JSErrorReporter older;
JSString *str;
rt = cx->runtime;
PR_ASSERT(JS_IS_RUNTIME_LOCKED(rt));
#ifdef SCOPE_TABLE_NOTYET
/* XXX hash recompute */
/* XXX protoProp->getter, protoProp->setter, protoProp->flags */
scope = js_MutateScope(cx, obj, id, getter, setter, flags, &prop);
#endif
scope = js_GetMutableScope(cx, obj);
if (!scope)
return NULL;
/* Handle old bug that treated empty string as zero index. */
CHECK_FOR_FUNNY_INDEX(id);
hash = js_HashValue(id);
sym = scope->ops->lookup(cx, scope, id, hash);
if (sym) {
prop = sym_property(sym);
#if JS_HAS_OBJ_WATCHPOINT
if (!prop) {
/*
* Deleted property place-holder, could have a watchpoint that
* holds the deleted-but-watched property.
*/
prop = js_FindWatchPoint(rt, obj, js_IdToValue(id));
}
#endif
} else {
prop = NULL;
}
if (!prop) {
/* Find a prototype property with the same id. */
proto = OBJ_GET_PROTO(obj);
protoProp = NULL;
while (proto) {
protoScope = (JSScope *)proto->map;
protoSym = protoScope->ops->lookup(cx, protoScope, id, hash);
if (protoSym) {
protoProp = sym_property(protoSym);
if (protoProp)
break;
}
proto = OBJ_GET_PROTO(proto);
}
/* Make a new property descriptor with the right heritage. */
if (protoProp) {
prop = js_NewProperty(cx, scope, id,
protoProp->getter, protoProp->setter,
protoProp->flags | JSPROP_ENUMERATE);
prop->id = protoProp->id;
} else {
prop = js_NewProperty(cx, scope, id,
scope->map.clasp->getProperty,
scope->map.clasp->setProperty,
JSPROP_ENUMERATE);
}
if (!prop)
return NULL;
if (!obj->map->clasp->addProperty(cx, obj, prop->id, vp)) {
js_DestroyProperty(cx, prop);
return NULL;
}
/* Initialize new properties to undefined. */
obj->slots[prop->slot] = JSVAL_VOID;
if (sym) {
/* Null-valued symbol left behind from a delete operation. */
sym->entry.value = js_HoldProperty(cx, prop);
}
}
if (!sym) {
/* Need a new symbol as well as a new property. */
sym = scope->ops->add(cx, scope, id, prop);
if (!sym)
return NULL;
#if JS_BUG_AUTO_INDEX_PROPS
{
jsval id2 = INT_TO_JSVAL(prop->slot - JSSLOT_START);
if (!scope->ops->add(cx, scope, id2, prop)) {
scope->ops->remove(cx, scope, id);
return NULL;
}
PROPERTY_CACHE_FILL(cx, &rt->propertyCache, obj, id2, prop);
}
#endif
PROPERTY_CACHE_FILL(cx, &rt->propertyCache, obj, id, prop);
}
/* Get the current property value from its slot. */
PR_ASSERT(prop->slot < obj->map->freeslot);
slot = prop->slot;
pval = obj->slots[slot];
/* Evil overloaded operator assign() hack. */
if (JSVAL_IS_OBJECT(pval)) {
assignobj = JSVAL_TO_OBJECT(pval);
if (assignobj) {
older = JS_SetErrorReporter(cx, NULL);
if (js_GetProperty(cx, assignobj, (jsval)rt->atomState.assignAtom,
&aval) &&
JSVAL_IS_FUNCTION(aval) &&
js_Call(cx, assignobj, aval, 1, vp, &rval)) {
*vp = rval;
JS_SetErrorReporter(cx, older);
prop->flags |= JSPROP_ASSIGNHACK;
return prop;
}
JS_SetErrorReporter(cx, older);
}
}
/* Check for readonly *after* the assign() hack. */
if (prop->flags & JSPROP_READONLY) {
if (!JSVERSION_IS_ECMA(cx->version)) {
str = js_ValueToSource(cx, js_IdToValue(id));
if (str) {
JS_ReportError(cx, "%s is read-only",
JS_GetStringBytes(str));
}
}
return NULL;
}
/* Let the setter modify vp before copying from it to obj->slots[slot]. */
if (!prop->setter(cx, obj, prop->id, vp))
return NULL;
GC_POKE(cx, pval);
obj->slots[slot] = *vp;
/* Setting a property makes it enumerable. */
prop->flags |= JSPROP_ENUMERATE;
return prop;
}
