Steamworks checking if a user is logged in

Question

So the code that I've been using to get a user's Steam ID is:

CSteamID uid = SteamUser()->GetSteamID();
uint64 pid = uid.ConvertToUint64();
std::ostringstream sin;
sin << pid;
std::string s = sin.str();
return s.c_str();

This works just fine, but when a user is not logged into Steam, this crashes.

Access violation - code c0000005 (first/second chance not available)

Does Steam provide a function that I can use to check if the user is logged in before running code that depends on the user being logged in? Or is there some sort of try/catch block I can use here to make sure that this does not break and return false if the user is not logged in?

Find out why it crashes. Is `SteamUser()` a NULL pointer? If so, there's your answer. — Lightness Races in Orbit, Apr 24 '15 at 18:21
@LightningRacisinObrit The exact error is `Access violation - code c0000005 (first/second chance not available)` — Liftoff, Apr 24 '15 at 18:23
@LightningRacisinOrbit Well Unreal Engine doesn't give me anything better than that, except for a call stack. — Liftoff, Apr 24 '15 at 19:44

score 1 · Accepted Answer · edited May 23 '17 at 12:09

1

Thanks to @Lightning Racis in Orbit. A simple nullptr check fixed it.

if(SteamUser() == nullptr)
    return false;

edited May 23 '17 at 12:09

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answered Apr 24 '15 at 18:39

Liftoff

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Steamworks checking if a user is logged in

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