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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2015 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/test.h>
#include <grub/dl.h>
#include <grub/misc.h>
GRUB_MOD_LICENSE ("GPLv3+");
static grub_uint64_t vectors[] = {
0xffffffffffffffffULL, 1, 2, 0, 0x0102030405060708ULL
};
static void
test16 (grub_uint16_t a)
{
grub_uint16_t b, c;
grub_uint8_t *ap, *bp;
int i;
b = grub_swap_bytes16 (a);
c = grub_swap_bytes16 (b);
grub_test_assert (a == c, "bswap not idempotent: 0x%llx, 0x%llx, 0x%llx",
(long long) a, (long long) b, (long long) c);
ap = (grub_uint8_t *) &a;
bp = (grub_uint8_t *) &b;
for (i = 0; i < 2; i++)
{
grub_test_assert (ap[i] == bp[1 - i],
"bswap bytes wrong: 0x%llx, 0x%llx",
(long long) a, (long long) b);
}
}
static void
test32 (grub_uint32_t a)
{
grub_uint32_t b, c;
grub_uint8_t *ap, *bp;
int i;
b = grub_swap_bytes32 (a);
c = grub_swap_bytes32 (b);
grub_test_assert (a == c, "bswap not idempotent: 0x%llx, 0x%llx, 0x%llx",
(long long) a, (long long) b, (long long) c);
ap = (grub_uint8_t *) &a;
bp = (grub_uint8_t *) &b;
for (i = 0; i < 4; i++)
{
grub_test_assert (ap[i] == bp[3 - i],
"bswap bytes wrong: 0x%llx, 0x%llx",
(long long) a, (long long) b);
}
}
static void
test64 (grub_uint64_t a)
{
grub_uint64_t b, c;
grub_uint8_t *ap, *bp;
int i;
b = grub_swap_bytes64 (a);
c = grub_swap_bytes64 (b);
grub_test_assert (a == c, "bswap not idempotent: 0x%llx, 0x%llx, 0x%llx",
(long long) a, (long long) b, (long long) c);
ap = (grub_uint8_t *) &a;
bp = (grub_uint8_t *) &b;
for (i = 0; i < 4; i++)
{
grub_test_assert (ap[i] == bp[7 - i],
"bswap bytes wrong: 0x%llx, 0x%llx",
(long long) a, (long long) b);
}
}
static void
test_all(grub_uint64_t a)
{
test64 (a);
test32 (a);
test16 (a);
}
static void
bswap_test (void)
{
grub_uint64_t a = 404, b = 7;
grub_size_t i;
for (i = 0; i < ARRAY_SIZE (vectors); i++)
{
test_all (vectors[i]);
}
for (i = 0; i < 40000; i++)
{
a = 17 * a + 13 * b;
b = 23 * a + 29 * b;
if (b == 0)
b = 1;
if (a == 0)
a = 1;
test_all (a);
test_all (b);
}
}
/* Register example_test method as a functional test. */
GRUB_FUNCTIONAL_TEST (bswap_test, bswap_test);
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