thuermann / exceptions-in-c

Demo of using exceptions in C

This is a short demo on how to use setjmp() and longjmp() in C to
imitate exceptions, in a similar way as in C++.

Usage:

// Provide a variable to hold exception codes (must be int)
int exc;
TRY (exc) {
	foo();
} CATCH (exc) {
default: // re-throw unhandled exceptions
	// do some local cleanups here if necessary
	...
	THROW(exc);
case 1: // Handle exception 1
	...
	break;
case 2: // Handle exception 2
	...
	break;
...
}

void foo(void)
{
	if (some_exceptional_condition)
		THROW(1);
}

Unhandled exceptions in a CATCH block *must* be re-thrown by THROW(exc).
Otherwise, the exception isn't passed on to the next higher TRY block.