static JSBool IteratorNextImpl(JSContext *cx, JSObject *obj, jsval *rval) { JSObject *iterable; jsval state; uintN flags; JSBool foreach, ok; jsid id; JS_ASSERT(OBJ_GET_CLASS(cx, obj) == &js_IteratorClass); iterable = OBJ_GET_PARENT(cx, obj); JS_ASSERT(iterable); state = STOBJ_GET_SLOT(obj, JSSLOT_ITER_STATE); if (JSVAL_IS_NULL(state)) goto stop; flags = JSVAL_TO_INT(STOBJ_GET_SLOT(obj, JSSLOT_ITER_FLAGS)); JS_ASSERT(!(flags & JSITER_ENUMERATE)); foreach = (flags & JSITER_FOREACH) != 0; ok = #if JS_HAS_XML_SUPPORT (foreach && OBJECT_IS_XML(cx, iterable)) ? ((JSXMLObjectOps *) iterable->map->ops)-> enumerateValues(cx, iterable, JSENUMERATE_NEXT, &state, &id, rval) : #endif OBJ_ENUMERATE(cx, iterable, JSENUMERATE_NEXT, &state, &id); if (!ok) return JS_FALSE; STOBJ_SET_SLOT(obj, JSSLOT_ITER_STATE, state); if (JSVAL_IS_NULL(state)) goto stop; if (foreach) { #if JS_HAS_XML_SUPPORT if (!OBJECT_IS_XML(cx, iterable) && !OBJ_GET_PROPERTY(cx, iterable, id, rval)) { return JS_FALSE; } #endif if (!NewKeyValuePair(cx, id, *rval, rval)) return JS_FALSE; } else { *rval = ID_TO_VALUE(id); } return JS_TRUE; stop: JS_ASSERT(STOBJ_GET_SLOT(obj, JSSLOT_ITER_STATE) == JSVAL_NULL); *rval = JSVAL_HOLE; return JS_TRUE; }
static JSBool CallReplacerFunction(JSContext *cx, jsid id, JSObject *holder, StringifyContext *scx, jsval *vp) { if (scx->replacer && js_IsCallable(scx->replacer, cx)) { jsval vec[2] = {ID_TO_VALUE(id), *vp}; if (!JS_CallFunctionValue(cx, holder, OBJECT_TO_JSVAL(scx->replacer), 2, vec, vp)) return JS_FALSE; } return JS_TRUE; }
static JSBool NewKeyValuePair(JSContext *cx, jsid key, jsval val, jsval *rval) { jsval vec[2]; JSTempValueRooter tvr; JSObject *aobj; vec[0] = ID_TO_VALUE(key); vec[1] = val; JS_PUSH_TEMP_ROOT(cx, 2, vec, &tvr); aobj = js_NewArrayObject(cx, 2, vec); *rval = OBJECT_TO_JSVAL(aobj); JS_POP_TEMP_ROOT(cx, &tvr); return aobj != NULL; }
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; }
static JSBool CallEnumeratorNext(JSContext *cx, JSObject *iterobj, uintN flags, jsval *rval) { JSObject *obj, *origobj; jsval state; JSBool foreach; jsid id; JSObject *obj2; JSBool cond; JSClass *clasp; JSExtendedClass *xclasp; JSProperty *prop; JSString *str; JS_ASSERT(flags & JSITER_ENUMERATE); JS_ASSERT(STOBJ_GET_CLASS(iterobj) == &js_IteratorClass); obj = STOBJ_GET_PARENT(iterobj); origobj = STOBJ_GET_PROTO(iterobj); state = STOBJ_GET_SLOT(iterobj, JSSLOT_ITER_STATE); if (JSVAL_IS_NULL(state)) goto stop; foreach = (flags & JSITER_FOREACH) != 0; #if JS_HAS_XML_SUPPORT /* * Treat an XML object specially only when it starts the prototype chain. * Otherwise we need to do the usual deleted and shadowed property checks. */ if (obj == origobj && OBJECT_IS_XML(cx, obj)) { if (foreach) { JSXMLObjectOps *xmlops = (JSXMLObjectOps *) obj->map->ops; if (!xmlops->enumerateValues(cx, obj, JSENUMERATE_NEXT, &state, &id, rval)) { return JS_FALSE; } } else { if (!OBJ_ENUMERATE(cx, obj, JSENUMERATE_NEXT, &state, &id)) return JS_FALSE; } STOBJ_SET_SLOT(iterobj, JSSLOT_ITER_STATE, state); if (JSVAL_IS_NULL(state)) goto stop; } else #endif { restart: if (!OBJ_ENUMERATE(cx, obj, JSENUMERATE_NEXT, &state, &id)) return JS_FALSE; STOBJ_SET_SLOT(iterobj, JSSLOT_ITER_STATE, state); if (JSVAL_IS_NULL(state)) { #if JS_HAS_XML_SUPPORT if (OBJECT_IS_XML(cx, obj)) { /* * We just finished enumerating an XML obj that is present on * the prototype chain of a non-XML origobj. Stop further * prototype chain searches because XML objects don't * enumerate prototypes. */ JS_ASSERT(origobj != obj); JS_ASSERT(!OBJECT_IS_XML(cx, origobj)); } else #endif { obj = OBJ_GET_PROTO(cx, obj); if (obj) { STOBJ_SET_PARENT(iterobj, obj); if (!OBJ_ENUMERATE(cx, obj, JSENUMERATE_INIT, &state, NULL)) return JS_FALSE; STOBJ_SET_SLOT(iterobj, JSSLOT_ITER_STATE, state); if (!JSVAL_IS_NULL(state)) goto restart; } } goto stop; } /* Skip properties not in obj when looking from origobj. */ if (!OBJ_LOOKUP_PROPERTY(cx, origobj, id, &obj2, &prop)) return JS_FALSE; if (!prop) goto restart; OBJ_DROP_PROPERTY(cx, obj2, prop); /* * If the id was found in a prototype object or an unrelated object * (specifically, not in an inner object for obj), skip it. This step * means that all OBJ_LOOKUP_PROPERTY implementations must return an * object further along on the prototype chain, or else possibly an * object returned by the JSExtendedClass.outerObject optional hook. */ if (obj != obj2) { cond = JS_FALSE; clasp = OBJ_GET_CLASS(cx, obj2); if (clasp->flags & JSCLASS_IS_EXTENDED) { xclasp = (JSExtendedClass *) clasp; cond = xclasp->outerObject && xclasp->outerObject(cx, obj2) == obj; } if (!cond) goto restart; } if (foreach) { /* Get property querying the original object. */ if (!OBJ_GET_PROPERTY(cx, origobj, id, rval)) return JS_FALSE; } } if (foreach) { if (flags & JSITER_KEYVALUE) { if (!NewKeyValuePair(cx, id, *rval, rval)) return JS_FALSE; } } else { /* Make rval a string for uniformity and compatibility. */ str = js_ValueToString(cx, ID_TO_VALUE(id)); if (!str) return JS_FALSE; *rval = STRING_TO_JSVAL(str); } return JS_TRUE; stop: JS_ASSERT(STOBJ_GET_SLOT(iterobj, JSSLOT_ITER_STATE) == JSVAL_NULL); *rval = JSVAL_HOLE; return JS_TRUE; }