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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
extern inline unsigned libj2_parity_j2u(const struct libj2_j2u *a);
/* TODO Add man page */
#else
static uintmax_t
random_ju(unsigned *popcount)
{
size_t n = LIBJ2_JU_BIT;
uintmax_t r = 0;
*popcount = 0;
while (n--) {
if (rand() < rand()) {
r |= (uintmax_t)1 << n;
*popcount += 1U;
}
}
return r;
}
int
main(void)
{
struct libj2_j2u a;
uintmax_t high, low;
unsigned i, high_n, low_n;
srand((unsigned)time(NULL));
a.high = 0;
a.low = 0;
EXPECT(libj2_parity_j2u(&a) == 0);
EXPECT(a.high == 0);
EXPECT(a.low == 0);
a.high = 0;
a.low = UINTMAX_MAX;
EXPECT(libj2_parity_j2u(&a) == (LIBJ2_JU_BIT & 1U));
EXPECT(a.high == 0);
EXPECT(a.low == UINTMAX_MAX);
a.high = UINTMAX_MAX;
a.low = 0;
EXPECT(libj2_parity_j2u(&a) == (LIBJ2_JU_BIT & 1U));
EXPECT(a.high == UINTMAX_MAX);
EXPECT(a.low == 0);
a.high = UINTMAX_MAX;
a.low = UINTMAX_MAX;
EXPECT(libj2_parity_j2u(&a) == (LIBJ2_J2U_BIT & 1U));
EXPECT(a.high == UINTMAX_MAX);
EXPECT(a.low == UINTMAX_MAX);
for (i = 0; i < 256; i++) {
a.high = high = random_ju(&high_n);
a.low = low = random_ju(&low_n);
EXPECT(libj2_parity_j2u(&a) == ((high_n + low_n) & 1U));
EXPECT(a.high == high);
EXPECT(a.low == low);
a.high = high = random_ju(&high_n);
a.low = low = 0;
EXPECT(libj2_parity_j2u(&a) == (high_n & 1U));
EXPECT(a.high == high);
EXPECT(a.low == 0);
a.high = high = random_ju(&high_n);
a.low = low = UINTMAX_MAX;
EXPECT(libj2_parity_j2u(&a) == ((high_n + LIBJ2_JU_BIT) & 1U));
EXPECT(a.high == high);
EXPECT(a.low == UINTMAX_MAX);
a.high = high = 0;
a.low = low = random_ju(&low_n);
EXPECT(libj2_parity_j2u(&a) == (low_n & 1U));
EXPECT(a.high == 0);
EXPECT(a.low == low);
a.high = high = UINTMAX_MAX;
a.low = low = random_ju(&low_n);
EXPECT(libj2_parity_j2u(&a) == ((LIBJ2_JU_BIT + low_n) & 1U));
EXPECT(a.high == UINTMAX_MAX);
EXPECT(a.low == low);
}
return 0;
}
#endif
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