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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
extern inline void libj2_ju_sub_ju_to_j2u(uintmax_t a, uintmax_t b, struct libj2_j2u *res);
/* TODO Add man page */
#else
static uintmax_t
random_ju(void)
{
size_t n = LIBJ2_JU_BIT;
uintmax_t r = 0;
while (n--)
if (rand() < rand())
r |= (uintmax_t)1 << n;
return r;
}
static void
check(uintmax_t a, uintmax_t b)
{
struct libj2_j2u r, expected;
int expected_overflow;
libj2_ju_to_j2u(a, &expected);
expected_overflow = libj2_j2u_sub_ju_overflow(&expected, b);
r = (struct libj2_j2u){111, 222};
libj2_ju_sub_ju_to_j2u(a, b, &r);
EXPECT(libj2_j2u_eq_j2u(&r, &expected));
r = (struct libj2_j2u){111, 222};
EXPECT(libj2_ju_sub_ju_to_j2u_overflow(a, b, &r) == expected_overflow);
EXPECT(libj2_j2u_eq_j2u(&r, &expected));
EXPECT(libj2_ju_sub_ju_overflow_p(a, b) == expected_overflow);
}
int
main(void)
{
unsigned i;
srand((unsigned)time(NULL));
check(0, 0);
check(0, UINTMAX_MAX);
check(UINTMAX_MAX, 0);
check(UINTMAX_MAX, UINTMAX_MAX);
for (i = 0; i < 256; i++) {
check(0, random_ju());
check(UINTMAX_MAX, random_ju());
check(random_ju(), 0);
check(random_ju(), random_ju());
check(random_ju(), UINTMAX_MAX);
}
return 0;
}
#endif
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