int main(int argc, char *argv[])
{
printf("calltest.c\n");
printf(" Calling int function: %d\n", int_func());
printf(" Calling float function: %f\n", float_func());
printf(" Calling double function: %f\n", double_func());
return 0;
}
int main (int argc, char **argv)
{
char char_resultval;
short short_resultval;
int int_resultval;
long long_resultval;
long long long_long_resultval;
float float_resultval;
double double_resultval;
int i;
/* A "test load" that will insure that the function really returns
a ${type} (as opposed to just a truncated or part of a ${type}). */
for (i = 0; i < sizeof (testval.ffff); i++)
testval.ffff[i] = 0xff;
void_func (); /* call to void_func */
char_resultval = char_func (); /* void_checkpoint */
short_resultval = short_func (); /* char_checkpoint */
int_resultval = int_func (); /* short_checkpoint */
long_resultval = long_func (); /* int_checkpoint */
long_long_resultval = long_long_func (); /* long_checkpoint */
/* On machines using IEEE floating point, the test pattern of all
1-bits established above turns out to be a floating-point NaN
("Not a Number"). According to the IEEE rules, NaN's aren't even
equal to themselves. This can lead to stupid conversations with
GDB like:
(gdb) p testval.float_testval == testval.float_testval
$7 = 0
(gdb)
This is the correct answer, but it's not the sort of thing
return2.exp wants to see. So to make things work the way they
ought, we'll set aside the `union' cleverness and initialize the
test values explicitly here. These values have interesting bits
throughout the value, so we'll still detect truncated values. */
testval.float_testval = 2.7182818284590452354;/* long_long_checkpoint */
float_resultval = float_func ();
testval.double_testval = 3.14159265358979323846; /* float_checkpoint */
double_resultval = double_func ();
main_test = 1; /* double_checkpoint */
return 0;
}
