Daily Unreal Column #61 - GConfig

Unreal's source code has multiple useful global variables. One of them is GConfig that acts as an interface allowing user to read and write things from configuration files.

I’m sure most of you are aware of a folder names Config in your project directory. Inside this directory you can find files like DefaultEngine.ini or DefaultGame.ini, and more.

You can use GConfig global variable to easily read data from any of these. For example, consider adding the following to your DefaultGame.ini file.

[MyCategoryName]
MyVariable=2

With the above definition of a section (MyCategoryName) and a variable (MyVariable) we can use the GConfig as following in order to read the value.

int32 OutConfigVariable;
const bool bSuccess = GConfig->GetInt(
    TEXT("MyCategoryName"), 
    TEXT("MyVariable"), 
    OutConfigVariable, 
    GGameIni);
if (bSuccess)
{
    UE_LOG(
        LogTemp, 
        Log, 
        TEXT("Successfully read MyVariable=%d"), 
        OutConfigVariable);
}