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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
extern inline void libj2_j2i_lsh(struct libj2_j2i *a, unsigned b);
/* TODO Add man page */
#else
static void
check(const struct libj2_j2i *a, unsigned shift, const struct libj2_j2i *expected, int overflow)
{
struct libj2_j2i a_saved = *a, r;
intmax_t v;
r = *a;
libj2_j2i_lsh(&r, shift);
EXPECT(libj2_j2i_eq_j2i(&r, expected));
r = *a;
EXPECT(libj2_j2i_lsh_overflow_p((const struct libj2_j2i *)&r, shift) == overflow);
EXPECT(libj2_j2i_eq_j2i(&r, a));
r = *a;
EXPECT(libj2_j2i_lsh_overflow(&r, shift) == overflow);
EXPECT(libj2_j2i_eq_j2i(&r, expected));
r = (struct libj2_j2i){111, 222};
libj2_j2i_lsh_to_j2i((const struct libj2_j2i *)a, shift, &r);
EXPECT(libj2_j2i_eq_j2i(a, &a_saved));
EXPECT(libj2_j2i_eq_j2i(&r, expected));
r = *a;
libj2_j2i_lsh_to_j2i(&r, shift, &r);
EXPECT(libj2_j2i_eq_j2i(&r, expected));
r = (struct libj2_j2i){111, 222};
EXPECT(libj2_j2i_lsh_to_j2i_overflow((const struct libj2_j2i *)a, shift, &r) == overflow);
EXPECT(libj2_j2i_eq_j2i(a, &a_saved));
EXPECT(libj2_j2i_eq_j2i(&r, expected));
r = *a;
EXPECT(libj2_j2i_lsh_to_j2i_overflow(&r, shift, &r) == overflow);
EXPECT(libj2_j2i_eq_j2i(&r, expected));
if (libj2_j2i_is_negative(a)) {
if (a->high != UINTMAX_MAX || ~a->low > UINTMAX_MAX >> 1)
return;
v = -(intmax_t)~a->low - 1;
} else {
if (a->high || a->low > UINTMAX_MAX >> 1)
return;
v = (intmax_t)a->low;
}
EXPECT(libj2_ji_lsh_overflow_p(v, shift) == overflow);
r = (struct libj2_j2i){111, 222};
libj2_ji_lsh_to_j2i(v, shift, &r);
EXPECT(libj2_j2i_eq_j2i(&r, expected));
r = (struct libj2_j2i){111, 222};
EXPECT(libj2_ji_lsh_to_j2i_overflow(v, shift, &r) == overflow);
EXPECT(libj2_j2i_eq_j2i(&r, expected));
}
int
main(void)
{
struct libj2_j2i a, b;
struct libj2_j2u t;
unsigned i, j, k, s;
int overflow;
srand((unsigned)time(NULL));
for (j = 0; j <= LIBJ2_J2I_BIT + 4U; j++) {
libj2_j2i_zero(&a);
libj2_j2i_zero(&b);
check(&a, j, &b, 0);
libj2_not_j2u((void *)&a);
libj2_not_j2u((void *)&b);
libj2_j2u_lsh((void *)&b, j);
check(&a, j, &b, j >= LIBJ2_J2I_BIT ? -1 : 0);
for (i = 0; i < LIBJ2_J2I_BIT; i++) {
libj2_j2i_zero(&a);
libj2_j2u_or_bit((void *)&a, i);
libj2_j2i_zero(&b);
if (i + j < LIBJ2_J2I_BIT)
libj2_j2u_or_bit((void *)&b, i + j);
overflow = i == LIBJ2_J2I_VBIT ? j ? -1 : 0 : i + j < LIBJ2_J2I_VBIT ? 0 : +1;
check(&a, j, &b, overflow);
libj2_j2i_zero(&a);
libj2_j2u_or_bit((void *)&a, i);
libj2_not_j2u((void *)&a);
libj2_j2i_zero(&b);
if (i + j < LIBJ2_J2I_BIT)
libj2_j2u_or_bit((void *)&b, i + j);
for (k = 0; k < j; k++)
libj2_j2u_or_bit((void *)&b, k);
libj2_not_j2u((void *)&b);
overflow = i == LIBJ2_J2I_VBIT ? j ? +1 : 0 : i + j < LIBJ2_J2I_VBIT ? 0 : -1;
check(&a, j, &b, overflow);
}
}
for (i = 0; i < 32; i++) {
for (j = 0; j < LIBJ2_J2I_BIT - 1U; j++) {
for (k = 0; k <= LIBJ2_J2I_BIT + 1U; k++) {
libj2_j2i_zero(&a);
libj2_j2i_zero(&b);
for (s = 0; s <= j; s++) {
if (rand() < rand())
continue;
libj2_j2u_or_bit((void *)&a, s);
libj2_j2u_or_bit((void *)&b, s + k);
}
overflow = libj2_co_j2u((const void *)&a) > libj2_co_j2u((const void *)&b);
overflow |= libj2_j2i_is_negative(&b);
check(&a, k, &b, overflow);
libj2_not_j2u((void *)&a);
libj2_not_j2u((void *)&b);
libj2_ju_lsh_to_j2u(1, k, &t);
libj2_j2u_sub_ju(&t, 1);
libj2_not_j2u(&t);
libj2_j2u_and_j2u((void *)&b, &t);
overflow = -overflow;
if (a.high == UINTMAX_MAX && a.low == UINTMAX_MAX && k >= LIBJ2_J2I_BIT)
overflow = -1;
check(&a, k, &b, overflow);
}
}
}
return 0;
}
#endif
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