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/* libmisc/tests/test_macro.c - Tests for <libmisc/macro.h>
*
* Copyright (C) 2024-2025 Luke T. Shumaker <lukeshu@lukeshu.com>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#include <libmisc/macro.h>
#include "test.h"
int main() {
printf("== LM_NEXT_POWER_OF_2 =====================================\n");
/* valid down to 0. */
test_assert(LM_NEXT_POWER_OF_2(0) == 1);
test_assert(LM_NEXT_POWER_OF_2(1) == 2);
test_assert(LM_NEXT_POWER_OF_2(2) == 4);
test_assert(LM_NEXT_POWER_OF_2(3) == 4);
test_assert(LM_NEXT_POWER_OF_2(4) == 8);
test_assert(LM_NEXT_POWER_OF_2(5) == 8);
test_assert(LM_NEXT_POWER_OF_2(6) == 8);
test_assert(LM_NEXT_POWER_OF_2(7) == 8);
test_assert(LM_NEXT_POWER_OF_2(8) == 16);
/* ... */
test_assert(LM_NEXT_POWER_OF_2(16) == 32);
/* ... */
test_assert(LM_NEXT_POWER_OF_2(0x7000000000000000) == 0x8000000000000000);
/* ... */
test_assert(LM_NEXT_POWER_OF_2(0x8000000000000000-1) == 0x8000000000000000);
/* Valid up to 0x8000000000000000-1 = (1<<63)-1 */
test_assert(LM_NEXT_POWER_OF_2(0x8000000000000000) == 0); /* :( */
printf("== LM_FLOORLOG2 ===========================================\n");
/* valid down to 1. */
test_assert(LM_FLOORLOG2(1) == 0);
test_assert(LM_FLOORLOG2(2) == 1);
test_assert(LM_FLOORLOG2(3) == 1);
test_assert(LM_FLOORLOG2(4) == 2);
test_assert(LM_FLOORLOG2(5) == 2);
test_assert(LM_FLOORLOG2(6) == 2);
test_assert(LM_FLOORLOG2(7) == 2);
test_assert(LM_FLOORLOG2(8) == 3);
/* ... */
test_assert(LM_FLOORLOG2(16) == 4);
/* ... */
test_assert(LM_FLOORLOG2(0x80000000) == 31);
/* ... */
test_assert(LM_FLOORLOG2(0xFFFFFFFF) == 31);
test_assert(LM_FLOORLOG2(0x100000000) == 32);
/* ... */
test_assert(LM_FLOORLOG2(0x8000000000000000) == 63);
/* ... */
test_assert(LM_FLOORLOG2(0xFFFFFFFFFFFFFFFF) == 63);
return 0;
}
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