Method make_random

src/FunctionInvocation.cpp:80–121

* XXX */

 * XXX
 */
FunctionInvocation *
FunctionInvocation::make_random(bool is_std_func,
				CGContext &cg_context,
				const Type* type,
				const CVQualifiers* qfer)
{
	FunctionInvocation *fi = 0;
	// If we are looking for a program-defined function, try to find one.
	if (!is_std_func) {
		Function* callee = NULL;
		if (pure_rnd_flipcoin(50)) {
			callee = Function::choose_func(get_all_functions(), cg_context, type, qfer);
		}
		if (callee != NULL) {
			FunctionInvocationUser *fiu = new FunctionInvocationUser(callee, true, NULL);
			fiu->build_invocation(callee, cg_context);
			fi = fiu;
			if (!fiu->failed) {
				cg_context.get_current_func()->fact_changed |= fiu->func->fact_changed;
			}
		}
		else if (!Function::reach_max_functions_cnt()) {
			fi = FunctionInvocationUser::build_invocation_and_function(cg_context, type, qfer);
		} else {
			// we can not find/create a function because we reach the limit, so give up
			fi = new FunctionInvocationUser(NULL, false, NULL);
			fi->failed = true;
			return fi;
		}
	}
	// now use standard functions, i.e., binary/unary operators to create an invocation
	if (fi == NULL) {
		int rnd_flag = rnd_flipcoin(StdUnaryFuncProb);
		if (rnd_flag) {
			fi = make_random_unary(cg_context, type);
		} else {
			fi = make_random_binary(cg_context, type);
		}
	}
	assert(fi != 0);
	return fi;
}

/*
 * TODO: FIX!  This is a bogus constructor, used only by the `OutputMain'.