Any good idioms for error handling in straight C programs?
- by Will Hartung
Getting back in to some C work.
Many of my functions look like this:
int err = do_something(arg1, arg2, arg3, &result);
With the intent the result gets populated by the function, and the return value is the status of the call.
The darkside is you get something naive like this:
int err = func1(...);
if (!err) {
err = func2(...);
if (!err) {
err = func3(...);
}
}
return err;
I could macro it I suppose:
#define ERR(x) if (!err) { err = (x) }
int err = 0;
ERR(func1(...));
ERR(func2(...));
ERR(func3(...));
return err;
But that only works if I'm chaining function calls, vs doing other work.
Obviously Java, C#, C++ have exceptions that work very well for these kinds of things.
I'm just curious what other folks do and how other folks do error handling in their C programs nowadays.
