C++ Handle::IsNumber方法代码示例

void printV8Value(Handle<Value> value, bool force=false)
{
    Logging::Level level = force ? Logging::ERROR : Logging::INFO;

    if (!Logging::shouldShow(level)) return;

    HandleScope handleScope;

    if (value.IsEmpty())
        Logging::log(level, "Empty handle\r\n");
    else if (value->IsInt32())
        Logging::log(level, "INT: %d\r\n", value->IntegerValue());
    else if (value->IsNull())
        Logging::log(level, "NULL (null)\r\n");
    else if (value->IsUndefined())
        Logging::log(level, "VOID (undefined)\r\n");
    else if (value->IsBoolean())
        Logging::log(level, "BOOLEAN: %d\r\n", value->BooleanValue());
    else if (value->IsNumber())
        Logging::log(level, "NUMBER: %f\r\n", value->NumberValue());
    else if (value->IsString())
        Logging::log(level, "STRING: ?\r\n");
    else if (value->IsObject())
        Logging::log(level, "OBJECT (object)\r\n");
    else
        Logging::log(level, "Uncertain V8 value\n");
}

IOBasicTypes::LongBufferSizeType ObjectByteWriterWithPosition::Write(const IOBasicTypes::Byte* inBuffer,IOBasicTypes::LongBufferSizeType inBufferSize)
{
    HandleScope handle;
    
    Handle<Object> anArray = Array::New((int)inBufferSize);
    for(int i=0;i<(int)inBufferSize;++i)
        anArray->Set(Number::New(i),Number::New(inBuffer[i]));
    
    Handle<Value> value = mObject->Get(String::New("write"));
    if(value->IsUndefined() || !value->IsFunction())
    {
		ThrowException(Exception::TypeError(String::New("write is not a function, it should be you know...")));
        return 0;
    }
    Handle<Function> func = Handle<Function>::Cast(value);
    
    Handle<Value> args[1];
    args[0] = anArray;
    
    Handle<Value> result = func->Call(mObject, 1, args);
    if(result.IsEmpty())
    {
		ThrowException(Exception::TypeError(String::New("wrong return value. it's empty. return the number of written characters")));
		return 0;
    }
    else if(result->IsNumber())
    {
        return result->ToNumber()->Uint32Value();
    }
    else
    {
		ThrowException(Exception::TypeError(String::New("wrong return value. write should return the number of written characters")));
		return 0;
    }
}

    int V8Scope::type( const char *field ){
        V8_SIMPLE_HEADER
        Handle<Value> v = get( field );
        if ( v->IsNull() )
            return jstNULL;
        if ( v->IsUndefined() )
            return Undefined;
        if ( v->IsString() )
            return String;
        if ( v->IsFunction() )
            return Code;
        if ( v->IsArray() )
            return Array;
        if ( v->IsBoolean() )
            return Bool;
        if ( v->IsInt32() )
            return NumberInt;
        if ( v->IsNumber() )
            return NumberDouble;
        if ( v->IsExternal() ){
            uassert( 10230 ,  "can't handle external yet" , 0 );
            return -1;
        }
        if ( v->IsDate() )
            return Date;
        if ( v->IsObject() )
            return Object;

        throw UserException( 12509, (string)"don't know what this is: " + field );
    }

Handle<Integer> V8Config::getIntegerParameter(Handle<Object> element,const char* key){

	Handle<Value> handleValue = getKeyHandle(element,key);
	assert(handleValue->IsNumber());
	return handleValue->ToInteger();

}

Handle<Value> BGJSView::startJS(const char* fnName, const char* configJson, Handle<Value> uiObj, long configId) {
	HandleScope scope;

	Handle<Value> config;

	if (configJson) {
		config = String::New(configJson);
	} else {
		config = v8::Undefined();
	}

	// bgjsgl->Set(String::New("log"), FunctionTemplate::New(BGJSGLModule::log));
	Local<Object> objInstance = this->jsViewOT->NewInstance();
	objInstance->SetInternalField(0, External::New(this));
	// Local<Object> instance = bgjsglft->GetFunction()->NewInstance();
	this->_jsObj = Persistent<Object>::New(objInstance);

	Handle<Value> argv[4] = { uiObj, this->_jsObj, config, Number::New(configId) };

	Handle<Value> res = this->_jsContext->callFunction(_jsContext->_context->Global(), fnName, 4,
			argv);
	if (res->IsNumber()) {
		_contentObj = res->ToNumber()->Value();
#ifdef DEBUG
		LOGD ("startJS return id %d", _contentObj);
#endif
	} else {
		LOGI ("Did not receive a return id from startJS");
	}
	return scope.Close(res);
}

int Conv::GetNaturalType(Handle<Value> val) {
  if(val.IsEmpty()) return TYPE_INVALID;
  if(val->IsUndefined()) return TYPE_UNDEFINED;
  if(val->IsNull()) return TYPE_NULL;
  if(val->IsBoolean() || val->IsBooleanObject()) return TYPE_BOOL;
  if(val->IsInt32()) return TYPE_INT;
  if(val->IsUint32()) return TYPE_LONG;
  if(val->IsNumber() || val->IsNumberObject()) return TYPE_DOUBLE;
  if(val->IsString() || val->IsStringObject()) return TYPE_STRING;
  return GetNaturalType(Handle<Object>::Cast(val));
}

 void v8ConvertIn(const Handle<Value> & value, QuantLib::Date & date)
 {
     if (value->IsNumber())
     {
         const double val = value->NumberValue();
         date = QuantLib::Date(val);
     }
     else
     {
         THROW_EXCEPTION("value is not a number");
     }
 }

Handle<Value> LayerFields::reorder(const Arguments& args)
{
	HandleScope scope;

	Handle<Object> parent = args.This()->GetHiddenValue(String::NewSymbol("parent_"))->ToObject();
	Layer *layer = ObjectWrap::Unwrap<Layer>(parent);
	if (!layer->get()) {
		return NODE_THROW("Layer object already destroyed");
	}

	OGRFeatureDefn *def = layer->get()->GetLayerDefn();
	if (!def) {
		return NODE_THROW("Layer has no layer definition set");
	}

	Handle<Array> field_map = Array::New(0);
	NODE_ARG_ARRAY(0, "field map", field_map);

	int n = def->GetFieldCount();
	OGRErr err = 0;

	if ((int)field_map->Length() != n) {
		return NODE_THROW("Array length must match field count");
	}

	int *field_map_array = new int[n];

	for (int i = 0; i < n; i++) {
		Handle<Value> val = field_map->Get(i);
		if (!val->IsNumber()) {
			delete [] field_map_array;
			return NODE_THROW("Array must only contain integers");
		}

		int key = val->IntegerValue();
		if (key < 0 || key >= n) {
			delete [] field_map_array;
			return NODE_THROW("Values must be between 0 and field count - 1");
		}

		field_map_array[i] = key;
	}

	err = layer->get()->ReorderFields(field_map_array);

	delete [] field_map_array;

	if (err) {
		return NODE_THROW_OGRERR(err);
	}
	return Undefined();
}

	void SerializeField(google::protobuf::Message *message, const Reflection *r, const FieldDescriptor *field, Handle<Value> val) {
		const EnumValueDescriptor *enumValue = NULL;
		bool repeated = field->is_repeated();

		switch (field->cpp_type()) {
		case FieldDescriptor::CPPTYPE_INT32:
			SET_VALUE(Int32, val->Int32Value());
			break;
		case FieldDescriptor::CPPTYPE_INT64:
			SET_VALUE(Int64, val->NumberValue());
			break;
		case FieldDescriptor::CPPTYPE_UINT32:
			SET_VALUE(UInt32, val->Uint32Value());
			break;
		case FieldDescriptor::CPPTYPE_UINT64:
			SET_VALUE(UInt64, val->NumberValue());
			break;
		case FieldDescriptor::CPPTYPE_DOUBLE:
			SET_VALUE(Double, val->NumberValue());
			break;
		case FieldDescriptor::CPPTYPE_FLOAT:
			SET_VALUE(Float, val->NumberValue());
			break;
		case FieldDescriptor::CPPTYPE_BOOL:
			SET_VALUE(Bool, val->BooleanValue());
			break;
		case FieldDescriptor::CPPTYPE_ENUM:
			enumValue = val->IsNumber() ? 
				field->enum_type()->FindValueByNumber(val->Int32Value()) :
				field->enum_type()->FindValueByName(*String::AsciiValue(val));
			if (enumValue != NULL)
				SET_VALUE(Enum, enumValue);
			break;
		case FieldDescriptor::CPPTYPE_MESSAGE:
			if (val->IsObject()) {
				Type* type = protobuf->GetType(field->message_type());
				type->SerializePart(repeated ?
					r->AddMessage(message, field) :
					r->MutableMessage(message, field), val.As<Object>());
			}
			break;
		case FieldDescriptor::CPPTYPE_STRING:
			if (Buffer::HasInstance(val)) {
				Local<Object> buf = val->ToObject();
				SET_VALUE(String, std::string(Buffer::Data(buf), Buffer::Length(buf)));
			} else {
				String::Utf8Value utf8(val);
				SET_VALUE(String, std::string(*utf8, utf8.length()));
			}
			break;
		}
	}

Susi::Util::Any Susi::JS::Engine::convertFromJS(Handle<Value> jsVal){
	if(jsVal->IsArray()){
		Susi::Util::Any::Array result;
		auto obj = jsVal->ToObject();
		const Local<Array> props = obj->GetPropertyNames();
		const uint32_t length = props->Length();
		for (uint32_t i=0 ; i<length ; ++i){
			const Local<Value> key = props->Get(i);
			const Local<Value> value = obj->Get(key);
			result.push_back(Susi::JS::Engine::convertFromJS(value));
		}
		return result;
	}
	if(jsVal->IsObject()){
		Susi::Util::Any result = Susi::Util::Any::Object{};
		auto obj = jsVal->ToObject();
		const Local<Array> props = obj->GetPropertyNames();
		const uint32_t length = props->Length();
		for (uint32_t i=0 ; i<length ; ++i){
			const Local<Value> key = props->Get(i);
			const Local<Value> value = obj->Get(key);
			String::Utf8Value keyStr(key);
			result[std::string(*keyStr)] = Susi::JS::Engine::convertFromJS(value);
		}
		return result;
	}
	if(jsVal->IsString()){
		String::Utf8Value val(jsVal);
		Susi::Util::Any result{std::string(*val)};
		return result;
	}
	if(jsVal->IsNumber()){
		Susi::Util::Any result{jsVal->ToNumber()->Value()};
		return result;
	}
	if(jsVal->IsBoolean()){
		Susi::Util::Any result{jsVal->ToBoolean()->Value()};
		return result;
	}
	if(jsVal->IsNativeError()){
		String::Utf8Value val(jsVal);
		Susi::Util::Any result{std::string(*val)};
		return result;
	}
	if(jsVal->IsUndefined()){
		Susi::Util::Any result;
		return result;
	}
	return Susi::Util::Any{"type not known"};
}

inline bool setField(OGRFeature* f, int field_index, Handle<Value> val){
	if (val->IsInt32()) {
		f->SetField(field_index, val->Int32Value());
	} else if (val->IsNumber()) {
		f->SetField(field_index, val->NumberValue());
	} else if (val->IsString()) {
		std::string str = *NanUtf8String(val);
		f->SetField(field_index, str.c_str());
	} else if(val->IsNull() || val->IsUndefined()) {
		f->UnsetField(field_index);
	} else {
		return true;
	}
	return false;
}

void v8_to_gvalue(Handle<Value> v, GValue *gv, GParamSpec *spec) {
	if(v->IsNumber()) {
		g_value_init(gv, G_TYPE_FLOAT);
		g_value_set_float(gv, v->NumberValue());
	} else if(v->IsString()) {
        String::Utf8Value value(v->ToString());
	    if(spec->value_type == GST_TYPE_CAPS) {
	        GstCaps* caps = gst_caps_from_string(*value);
	        g_value_init(gv, GST_TYPE_CAPS);
	        g_value_set_boxed(gv, caps);
	    } else {
	        g_value_init(gv, G_TYPE_STRING);
            g_value_set_string(gv, *value);
	    }
	} else if(v->IsBoolean()) {
		g_value_init(gv, G_TYPE_BOOLEAN);
		g_value_set_boolean(gv, v->BooleanValue());
	}

	return;
}

VALUE rr_v82rb(Handle<Value> value) {
  if (value.IsEmpty()) {
    return rr_v8_value_empty();
  }
  if (value->IsUndefined() || value->IsNull()) {
    return Qnil;
  }
  if (value->IsExternal()) {
    return rr_reflect_v8_external(value);
  }
  if (value->IsUint32()) {
    return UINT2NUM(value->Uint32Value());
  }
  if (value->IsInt32()) {
    return INT2FIX(value->Int32Value());
  }
  if (value->IsBoolean()) {
    return value->BooleanValue() ? Qtrue : Qfalse;
  }
  if (value->IsNumber()) {
    return rb_float_new(value->NumberValue());
  }  
  if (value->IsString()) {
    return rr_reflect_v8_string(value);
  }
  if (value->IsFunction()) {
    return rr_reflect_v8_function(value);
  }
  if (value->IsArray()) {
    return rr_reflect_v8_array(value);
  }
  if (value->IsDate()) {
    return rr_reflect_v8_date(value);
  }
  if (value->IsObject()) {
    return rr_reflect_v8_object(value);
  }
  return rr_wrap_v8_value(value);  
}

int NativeAbstractTextControlObject::setTextAlign(TiObject* obj)
{
    Handle<Value> value = obj->getValue();
    int alignment;

    if (!value->IsNumber()) {
        QString s = V8ValueToQString(value);
        if (s == "left") {
            alignment = Ti::UI::TEXT_ALIGNMENT_LEFT;
        } else if (s == "center") {
            alignment = Ti::UI::TEXT_ALIGNMENT_CENTER;
        } else if (s == "right") {
            alignment = Ti::UI::TEXT_ALIGNMENT_RIGHT;
        } else {
            return NATIVE_ERROR_INVALID_ARG;
        }
    } else {
        alignment = value->IntegerValue();
    }

    switch (alignment)
    {
    case Ti::UI::TEXT_ALIGNMENT_LEFT:
        textControl_->textStyle()->setTextAlign(bb::cascades::TextAlign::Left);
        break;
    case Ti::UI::TEXT_ALIGNMENT_CENTER:
        textControl_->textStyle()->setTextAlign(bb::cascades::TextAlign::Center);
        break;
    case Ti::UI::TEXT_ALIGNMENT_RIGHT:
        textControl_->textStyle()->setTextAlign(bb::cascades::TextAlign::Right);
        break;
    default:
        return NATIVE_ERROR_INVALID_ARG;
    }

    return NATIVE_ERROR_OK;
}

static void setTimeout(getdns_context* context, Handle<Value> opt) {
    if (opt->IsNumber()) {
        uint32_t num = opt->Uint32Value();
        getdns_context_set_timeout(context, num);
    }
}