[C++] Game server design for MMORPG Emulator

[AcarX]

Kinda late on this, but instead of using a switch for handling by opcode, you can also use an array of handler objects. That makes it alot more organized in my opinion.

Hey thanks for the answer. Could you explain what do you mean by handler objects and how would I use them?

 

[Future]

Hey thanks for the answer. Could you explain what do you mean by handler objects and how would I use them?

I could imagine something like this to be very fast (C++ code):

// Array of function pointers having the size of all OP Codes
BOOL (*handlers[MAX_OP_CODE])(void);

// Then assign them at the op codes
handlers[OP_CODE_LOGIN] = &HandleLogin; // expecting: BOOL HandleLogin(void) { blablabla }
[...]

// Later you can just exec the handler in the array at the position of the OP code
BOOL result = handlers[opCode]();

 

[SYJourney]

Hey thanks for the answer. Could you explain what do you mean by handler objects and how would I use them?

Make an interface for handling packets and subclass it for each opcode. As in a command pattern:

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[AcarX]

Thanks for the answers. There're 3 opcodes for each packet but I think I can use std::unordered_map for that. It looks much cleaner compared to switch loop. Something like:

std::unordered_map<std::string, UINT32> handler_map;
handler_map.insert(std::make_pair("040D15", OP_CODE_LOGIN));

// Array of function pointers having the size of all OP Codes
BOOL (*handlers[MAX_OP_CODE])(void);


// Then assign them at the op codes
handlers[OP_CODE_LOGIN] = &HandleLogin; // expecting: BOOL HandleLogin(void) { blablabla }
[...]


// Later you can just exec the handler in the array at the position of the OP code
BOOL result = handlers[handler_map["040D15"]]();