/*===
*** test_1 (duk_safe_call)
this binding: 'undefined'
result=33
final top: 0
==> rc=0, result='undefined'
*** test_2 (duk_safe_call)
this binding: 'undefined'
==> rc=1, result='TypeError: argument 2 is not a number'
===*/

static duk_ret_t my_adder(duk_context *ctx) {
	duk_idx_t i, n;
	double res = 0.0;

	duk_push_this(ctx);
	printf("this binding: '%s'\n", duk_to_string(ctx, -1));
	duk_pop(ctx);

	n = duk_get_top(ctx);
	for (i = 0; i < n; i++) {
		if (!duk_is_number(ctx, i)) {
			duk_error(ctx, DUK_ERR_TYPE_ERROR, "argument %ld is not a number", (long) i);
		}
		res += duk_get_number(ctx, i);
	}

	duk_push_number(ctx, res);
	return 1;
}

static duk_ret_t test_1(duk_context *ctx) {
	duk_set_top(ctx, 0);

	duk_push_c_function(ctx, my_adder, 3 /*nargs*/);
	duk_push_int(ctx, 10);
	duk_push_int(ctx, 11);
	duk_push_int(ctx, 12);
	duk_push_int(ctx, 13);  /* clipped */
	duk_push_int(ctx, 14);  /* clipped */
	duk_call(ctx, 5);

	printf("result=%s\n", duk_to_string(ctx, -1));
	duk_pop(ctx);

	printf("final top: %ld\n", (long) duk_get_top(ctx));
	return 0;
}

static duk_ret_t test_2(duk_context *ctx) {
	duk_set_top(ctx, 0);

	duk_push_c_function(ctx, my_adder, 3 /*nargs*/);
	duk_push_int(ctx, 10);
	duk_push_int(ctx, 11);
	duk_push_string(ctx, "foo");  /* causes error */
	duk_push_int(ctx, 13);  /* clipped */
	duk_push_int(ctx, 14);  /* clipped */
	duk_call(ctx, 5);

	printf("result=%s\n", duk_to_string(ctx, -1));
	duk_pop(ctx);

	printf("final top: %ld\n", (long) duk_get_top(ctx));
	return 0;
}

void test(duk_context *ctx) {
	TEST_SAFE_CALL(test_1);
	TEST_SAFE_CALL(test_2);
}