void IDeserializer::NumberI8(const char* name, int8_t& out, int8_t lower, int8_t upper)
{
int8_t value;
Get(name, (u8*)&value, sizeof(uint8_t));
if (!(lower <= value && value <= upper))
throw PSERROR_Deserialize_OutOfBounds(name);
out = value;
}
void IDeserializer::NumberU32(const char* name, uint32_t& out, uint32_t lower, uint32_t upper)
{
uint32_t value;
Get(name, (u8*)&value, sizeof(uint32_t));
value = to_le32(value);
if (!(lower <= value && value <= upper))
throw PSERROR_Deserialize_OutOfBounds(name);
out = value;
}
void CStdDeserializer::RequireBytesInStream(size_t numBytes)
{
// It would be nice to do:
// if (numBytes > (size_t)m_Stream.rdbuf()->in_avail())
// throw PSERROR_Deserialize_OutOfBounds("RequireBytesInStream");
// but that doesn't work (at least on MSVC) since in_avail isn't
// guaranteed to return the actual number of bytes available; see e.g.
// http://social.msdn.microsoft.com/Forums/en/vclanguage/thread/13009a88-933f-4be7-bf3d-150e425e66a6#70ea562d-8605-4742-8851-1bae431ce6ce
// Instead we'll just verify that it's not an extremely large number:
if (numBytes > 64*MiB)
throw PSERROR_Deserialize_OutOfBounds("RequireBytesInStream");
}
void IDeserializer::String(const char* name, std::wstring& out, uint32_t minlength, uint32_t maxlength)
{
std::string str;
uint32_t len;
NumberU32_Unbounded("string length", len);
RequireBytesInStream(len);
str.resize(len);
Get(name, (u8*)str.data(), len);
Status err;
out = wstring_from_utf8(str, &err);
if (err)
throw PSERROR_Deserialize_InvalidCharInString();
if (!(minlength <= out.length() && out.length() <= maxlength))
throw PSERROR_Deserialize_OutOfBounds(name);
}
jsval CStdDeserializer::ReadScriptVal(const char* UNUSED(name), JS::HandleObject appendParent)
{
JSContext* cx = m_ScriptInterface.GetContext();
JSAutoRequest rq(cx);
uint8_t type;
NumberU8_Unbounded("type", type);
switch (type)
{
case SCRIPT_TYPE_VOID:
return JS::UndefinedValue();
case SCRIPT_TYPE_NULL:
return JS::NullValue();
case SCRIPT_TYPE_ARRAY:
case SCRIPT_TYPE_OBJECT:
case SCRIPT_TYPE_OBJECT_PROTOTYPE:
{
JS::RootedObject obj(cx);
if (appendParent)
{
obj.set(appendParent);
}
else if (type == SCRIPT_TYPE_ARRAY)
{
u32 length;
NumberU32_Unbounded("array length", length);
obj.set(JS_NewArrayObject(cx, length));
}
else if (type == SCRIPT_TYPE_OBJECT)
{
obj.set(JS_NewPlainObject(cx));
}
else // SCRIPT_TYPE_OBJECT_PROTOTYPE
{
std::wstring prototypeName;
String("proto name", prototypeName, 0, 256);
// Get constructor object
JS::RootedObject proto(cx);
GetSerializablePrototype(prototypeName, &proto);
if (!proto)
throw PSERROR_Deserialize_ScriptError("Failed to find serializable prototype for object");
JS::RootedObject parent(cx, JS_GetParent(proto));
if (!proto || !parent)
throw PSERROR_Deserialize_ScriptError();
// TODO: Remove support for parent since this is dropped upstream SpiderMonkey
obj.set(JS_NewObjectWithGivenProto(cx, nullptr, proto, parent));
if (!obj)
throw PSERROR_Deserialize_ScriptError("JS_NewObject failed");
// Does it have custom Deserialize function?
// if so, we let it handle the deserialized data, rather than adding properties directly
bool hasCustomDeserialize, hasCustomSerialize;
if (!JS_HasProperty(cx, obj, "Serialize", &hasCustomSerialize) || !JS_HasProperty(cx, obj, "Deserialize", &hasCustomDeserialize))
throw PSERROR_Serialize_ScriptError("JS_HasProperty failed");
if (hasCustomDeserialize)
{
AddScriptBackref(obj);
JS::RootedValue serialize(cx);
if (!JS_GetProperty(cx, obj, "Serialize", &serialize))
throw PSERROR_Serialize_ScriptError("JS_GetProperty failed");
bool hasNullSerialize = hasCustomSerialize && serialize.isNull();
// If Serialize is null, we'll still call Deserialize but with undefined argument
JS::RootedValue data(cx);
if (!hasNullSerialize)
ScriptVal("data", &data);
JS::RootedValue objVal(cx, JS::ObjectValue(*obj));
m_ScriptInterface.CallFunctionVoid(objVal, "Deserialize", data);
return JS::ObjectValue(*obj);
}
}
if (!obj)
throw PSERROR_Deserialize_ScriptError("Deserializer failed to create new object");
AddScriptBackref(obj);
uint32_t numProps;
NumberU32_Unbounded("num props", numProps);
bool isLatin1;
for (uint32_t i = 0; i < numProps; ++i)
{
Bool("isLatin1", isLatin1);
if (isLatin1)
{
std::vector<JS::Latin1Char> propname;
ReadStringLatin1("prop name", propname);
JS::RootedValue propval(cx, ReadScriptVal("prop value", JS::NullPtr()));
utf16string prp(propname.begin(), propname.end());;
// TODO: Should ask upstream about getting a variant of JS_SetProperty with a length param.
if (!JS_SetUCProperty(cx, obj, (const char16_t*)prp.data(), prp.length(), propval))
throw PSERROR_Deserialize_ScriptError();
}
else
{
utf16string propname;
ReadStringUTF16("prop name", propname);
JS::RootedValue propval(cx, ReadScriptVal("prop value", JS::NullPtr()));
if (!JS_SetUCProperty(cx, obj, (const char16_t*)propname.data(), propname.length(), propval))
throw PSERROR_Deserialize_ScriptError();
}
}
return JS::ObjectValue(*obj);
}
case SCRIPT_TYPE_STRING:
{
JS::RootedString str(cx);
ScriptString("string", &str);
return JS::StringValue(str);
}
case SCRIPT_TYPE_INT:
{
int32_t value;
NumberI32("value", value, JSVAL_INT_MIN, JSVAL_INT_MAX);
return JS::NumberValue(value);
}
case SCRIPT_TYPE_DOUBLE:
{
double value;
NumberDouble_Unbounded("value", value);
JS::RootedValue rval(cx, JS::NumberValue(value));
if (rval.isNull())
throw PSERROR_Deserialize_ScriptError("JS_NewNumberValue failed");
return rval;
}
case SCRIPT_TYPE_BOOLEAN:
{
uint8_t value;
NumberU8("value", value, 0, 1);
return JS::BooleanValue(value ? true : false);
}
case SCRIPT_TYPE_BACKREF:
{
u32 tag;
NumberU32_Unbounded("tag", tag);
JS::RootedObject obj(cx);
GetScriptBackref(tag, &obj);
if (!obj)
throw PSERROR_Deserialize_ScriptError("Invalid backref tag");
return JS::ObjectValue(*obj);
}
case SCRIPT_TYPE_OBJECT_NUMBER:
{
double value;
NumberDouble_Unbounded("value", value);
JS::RootedValue val(cx, JS::NumberValue(value));
JS::RootedObject ctorobj(cx);
if (!JS_GetClassObject(cx, JSProto_Number, &ctorobj))
throw PSERROR_Deserialize_ScriptError("JS_GetClassObject failed");
JS::RootedObject obj(cx, JS_New(cx, ctorobj, JS::HandleValueArray(val)));
if (!obj)
throw PSERROR_Deserialize_ScriptError("JS_New failed");
AddScriptBackref(obj);
return JS::ObjectValue(*obj);
}
case SCRIPT_TYPE_OBJECT_STRING:
{
JS::RootedString str(cx);
ScriptString("value", &str);
if (!str)
throw PSERROR_Deserialize_ScriptError();
JS::RootedValue val(cx, JS::StringValue(str));
JS::RootedObject ctorobj(cx);
if (!JS_GetClassObject(cx, JSProto_String, &ctorobj))
throw PSERROR_Deserialize_ScriptError("JS_GetClassObject failed");
JS::RootedObject obj(cx, JS_New(cx, ctorobj, JS::HandleValueArray(val)));
if (!obj)
throw PSERROR_Deserialize_ScriptError("JS_New failed");
AddScriptBackref(obj);
return JS::ObjectValue(*obj);
}
case SCRIPT_TYPE_OBJECT_BOOLEAN:
{
bool value;
Bool("value", value);
JS::RootedValue val(cx, JS::BooleanValue(value));
JS::RootedObject ctorobj(cx);
if (!JS_GetClassObject(cx, JSProto_Boolean, &ctorobj))
throw PSERROR_Deserialize_ScriptError("JS_GetClassObject failed");
JS::RootedObject obj(cx, JS_New(cx, ctorobj, JS::HandleValueArray(val)));
if (!obj)
throw PSERROR_Deserialize_ScriptError("JS_New failed");
AddScriptBackref(obj);
return JS::ObjectValue(*obj);
}
case SCRIPT_TYPE_TYPED_ARRAY:
{
u8 arrayType;
u32 byteOffset, length;
NumberU8_Unbounded("array type", arrayType);
NumberU32_Unbounded("byte offset", byteOffset);
NumberU32_Unbounded("length", length);
// To match the serializer order, we reserve the typed array's backref tag here
JS::RootedObject arrayObj(cx);
AddScriptBackref(arrayObj);
// Get buffer object
JS::RootedValue bufferVal(cx, ReadScriptVal("buffer", JS::NullPtr()));
if (!bufferVal.isObject())
throw PSERROR_Deserialize_ScriptError();
JS::RootedObject bufferObj(cx, &bufferVal.toObject());
if (!JS_IsArrayBufferObject(bufferObj))
throw PSERROR_Deserialize_ScriptError("js_IsArrayBuffer failed");
switch(arrayType)
{
case SCRIPT_TYPED_ARRAY_INT8:
arrayObj = JS_NewInt8ArrayWithBuffer(cx, bufferObj, byteOffset, length);
break;
case SCRIPT_TYPED_ARRAY_UINT8:
arrayObj = JS_NewUint8ArrayWithBuffer(cx, bufferObj, byteOffset, length);
break;
case SCRIPT_TYPED_ARRAY_INT16:
arrayObj = JS_NewInt16ArrayWithBuffer(cx, bufferObj, byteOffset, length);
break;
case SCRIPT_TYPED_ARRAY_UINT16:
arrayObj = JS_NewUint16ArrayWithBuffer(cx, bufferObj, byteOffset, length);
break;
case SCRIPT_TYPED_ARRAY_INT32:
arrayObj = JS_NewInt32ArrayWithBuffer(cx, bufferObj, byteOffset, length);
break;
case SCRIPT_TYPED_ARRAY_UINT32:
arrayObj = JS_NewUint32ArrayWithBuffer(cx, bufferObj, byteOffset, length);
break;
case SCRIPT_TYPED_ARRAY_FLOAT32:
arrayObj = JS_NewFloat32ArrayWithBuffer(cx, bufferObj, byteOffset, length);
break;
case SCRIPT_TYPED_ARRAY_FLOAT64:
arrayObj = JS_NewFloat64ArrayWithBuffer(cx, bufferObj, byteOffset, length);
break;
case SCRIPT_TYPED_ARRAY_UINT8_CLAMPED:
arrayObj = JS_NewUint8ClampedArrayWithBuffer(cx, bufferObj, byteOffset, length);
break;
default:
throw PSERROR_Deserialize_ScriptError("Failed to deserialize unrecognized typed array view");
}
if (!arrayObj)
throw PSERROR_Deserialize_ScriptError("js_CreateTypedArrayWithBuffer failed");
return JS::ObjectValue(*arrayObj);
}
case SCRIPT_TYPE_ARRAY_BUFFER:
{
u32 length;
NumberU32_Unbounded("buffer length", length);
#if BYTE_ORDER != LITTLE_ENDIAN
#error TODO: need to convert JS ArrayBuffer data from little-endian
#endif
void* contents = malloc(length);
ENSURE(contents);
RawBytes("buffer data", (u8*)contents, length);
JS::RootedObject bufferObj(cx, JS_NewArrayBufferWithContents(cx, length, contents));
AddScriptBackref(bufferObj);
return JS::ObjectValue(*bufferObj);
}
case SCRIPT_TYPE_OBJECT_MAP:
{
JS::RootedObject obj(cx, JS::NewMapObject(cx));
AddScriptBackref(obj);
u32 mapSize;
NumberU32_Unbounded("map size", mapSize);
for (u32 i=0; i<mapSize; ++i)
{
JS::RootedValue key(cx, ReadScriptVal("map key", JS::NullPtr()));
JS::RootedValue value(cx, ReadScriptVal("map value", JS::NullPtr()));
JS::MapSet(cx, obj, key, value);
}
return JS::ObjectValue(*obj);
}
case SCRIPT_TYPE_OBJECT_SET:
{
JS::RootedValue setVal(cx);
m_ScriptInterface.Eval("(new Set())", &setVal);
JS::RootedObject setObj(cx, &setVal.toObject());
AddScriptBackref(setObj);
u32 setSize;
NumberU32_Unbounded("set size", setSize);
for (u32 i=0; i<setSize; ++i)
{
JS::RootedValue value(cx, ReadScriptVal("set value", JS::NullPtr()));
m_ScriptInterface.CallFunctionVoid(setVal, "add", value);
}
return setVal;
}
default:
throw PSERROR_Deserialize_OutOfBounds();
}
}
jsval CStdDeserializer::ReadScriptVal(JSObject* appendParent)
{
JSContext* cx = m_ScriptInterface.GetContext();
uint8_t type;
NumberU8_Unbounded("type", type);
switch (type)
{
case SCRIPT_TYPE_VOID:
return JSVAL_VOID;
case SCRIPT_TYPE_NULL:
return JSVAL_NULL;
case SCRIPT_TYPE_ARRAY:
case SCRIPT_TYPE_OBJECT:
{
JSObject* obj;
if (appendParent)
obj = appendParent;
else if (type == SCRIPT_TYPE_ARRAY)
obj = JS_NewArrayObject(cx, 0, NULL);
else
obj = JS_NewObject(cx, NULL, NULL, NULL);
if (!obj)
throw PSERROR_Deserialize_ScriptError();
CScriptValRooted objRoot(cx, OBJECT_TO_JSVAL(obj));
AddScriptBackref(obj);
uint32_t numProps;
NumberU32_Unbounded("num props", numProps);
for (uint32_t i = 0; i < numProps; ++i)
{
utf16string propname;
ReadStringUTF16(propname);
jsval propval = ReadScriptVal(NULL);
CScriptValRooted propvalRoot(cx, propval);
if (!JS_SetUCProperty(cx, obj, (const jschar*)propname.data(), propname.length(), &propval))
throw PSERROR_Deserialize_ScriptError();
}
return OBJECT_TO_JSVAL(obj);
}
case SCRIPT_TYPE_STRING:
{
JSString* str;
ScriptString("string", str);
return STRING_TO_JSVAL(str);
}
case SCRIPT_TYPE_INT:
{
int32_t value;
NumberI32("value", value, JSVAL_INT_MIN, JSVAL_INT_MAX);
return INT_TO_JSVAL(value);
}
case SCRIPT_TYPE_DOUBLE:
{
double value;
NumberDouble_Unbounded("value", value);
jsval rval;
if (!JS_NewNumberValue(cx, value, &rval))
throw PSERROR_Deserialize_ScriptError("JS_NewNumberValue failed");
return rval;
}
case SCRIPT_TYPE_BOOLEAN:
{
uint8_t value;
NumberU8("value", value, 0, 1);
return BOOLEAN_TO_JSVAL(value ? JS_TRUE : JS_FALSE);
}
case SCRIPT_TYPE_BACKREF:
{
u32 tag;
NumberU32_Unbounded("tag", tag);
JSObject* obj = GetScriptBackref(tag);
if (!obj)
throw PSERROR_Deserialize_ScriptError("Invalid backref tag");
return OBJECT_TO_JSVAL(obj);
}
default:
throw PSERROR_Deserialize_OutOfBounds();
}
}
