node-ffi module and struct

[Bolat Menshik]

Greetings Everybody!

I have library on linux.

That library have struct.

Manual of this library says that struct must be initialized, like this:

	LONG lUserID;
	NET_DVR_DEVICEINFO_V30 struDeviceInfo;
	lUserID = NET_DVR_Login_V30("192.168.1.64", 8000, "admin", "12", &struDeviceInfo);

struDeviceInfo — output data from device, that I must to read and use.  

How can I code this in Nodejs. 

PS: I have use node-ffi module, library initialization and connect to device finished ok. 

Near part of code:

var libHikSDK = ffi.Library('./libhcnetsdk.so',{
'NET_DVR_Init': ['bool', []],
'NET_DVR_SetConnectTime': ['bool', ['char','char']],
'NET_DVR_SetReconnect': ['bool', ['char','bool']],
'NET_DVR_Login_V30': ['char', ['string','int', 'string','string']],
'NET_DVR_Cleanup':['void', []],
'NET_DVR_GetLastError':['char', []],
'NET_DVR_GetSDKVersion':['char',[]],
'NET_DVR_SetLogToFile':['bool',['int','string']]
});
libHikSDK.NET_DVR_Cleanup(); 
var init = libHikSDK.NET_DVR_Init();
var v = libHikSDK.NET_DVR_GetSDKVersion();
var s = libHikSDK.NET_DVR_SetConnectTime('200000', '1');
libHikSDK.NET_DVR_SetLogToFile(3,"/home/user");
var i = libHikSDK.NET_DVR_Login_V30("192.168.0.10", 8000, "admin","12345");
var g = libHikSDK.NET_DVR_GetLastError();