fdc9ecbacc
* Add function to memcpy memory with offset. * Add count trailing zeros function. * Add function to determine pointer alignment. * Add helper to swap sequences of 2 bytes. * Add helper to swap sequences of 4 bytes. * Print pointer in warning * Fix tests * Use uintptr_t type to prevent undefined behavior. * Remove alignment requirement and rely on malloc promises. * Add in place byte swap functions. * Move the endianness swapping into util/rz_endian * Use GNU builtin __builtin_ctzll/clzll. Also fixes the include guards of __builtin_clzll and handles the undefined case of x == 0 of it. * Add doxygen
70 lines
3.2 KiB
C
70 lines
3.2 KiB
C
// SPDX-FileCopyrightText: 2025 Rot127 <unisono@quyllur.org>
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// SPDX-License-Identifier: LGPL-3.0-only
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#include <rz_util.h>
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#include "minunit.h"
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#include "rz_util/rz_bits.h"
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bool test_rz_bits_count(void) {
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mu_assert_eq(rz_bits_count_ones_ut64(0xffffffffffffffff), 64, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0), 0, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(1), 1, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0x8000000000000000), 1, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0x7fffffffffffffff), 63, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0xfffffffffffffffe), 63, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0xffffffffffefffff), 63, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0x0fffffffffffffff), 60, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0xf0ffffffffffffff), 60, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0xffffffffff0fffff), 60, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0xffffffff00000000), 32, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0x00000000ffffffff), 32, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0x0000010000000000), 1, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0x0000000000001000), 1, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0x0100000100001000), 3, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0x0400000100002000), 3, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0x0400008100002000), 4, "Bit count mismatch.");
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mu_assert_eq(rz_bits_count_ones_ut64(0x0400008100002008), 5, "Bit count mismatch.");
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for (size_t i = 0; i <= 0xff; i++) {
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size_t naive_count = 0;
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for (size_t k = 0; k < 8; k++) {
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naive_count += i & (1 << k) ? 1 : 0;
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}
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mu_assert_eq(rz_bits_count_ones_ut8(i), naive_count, "Bit count mismatch.");
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}
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mu_end;
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}
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bool test_rz_bits_trailing_zero(void) {
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mu_assert_eq(rz_bits_trailing_zeros(0), 64, "Bit count mismatch.");
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for (size_t i = 1, j = 0; i != 0; i <<= 1, j++) {
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mu_assert_eq(rz_bits_trailing_zeros(i), j, "Bit count mismatch.");
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}
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mu_end;
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}
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bool test_rz_bits_spread(void) {
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mu_assert_eq(rz_bits_spread(0xffffffffffffffff, 0xffffffffffffffff), 0xffffffffffffffff, "Spread mismatch.");
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mu_assert_eq(rz_bits_spread(0, 0xffffffffffffffff), 0, "Spread mismatch.");
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mu_assert_eq(rz_bits_spread(0x1, 0xfffffffffffffffe), 0, "Spread mismatch.");
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mu_assert_eq(rz_bits_spread(0x8000000000000000, 0x7fffffffffffffff), 0x8000000000000000, "Spread mismatch.");
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mu_assert_eq(rz_bits_spread(0x0000000055555555, 0xffffffffffffffff), 0x55555555, "Spread mismatch.");
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mu_assert_eq(rz_bits_spread(0xf300021, 0xff), 0xf300021, "Spread mismatch.");
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mu_assert_eq(rz_bits_spread(0xf300021, 0xfe), 0xf300020, "Spread mismatch.");
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mu_assert_eq(rz_bits_spread(0xf300021, 0x7e), 0x7300020, "Spread mismatch.");
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mu_assert_eq(rz_bits_spread(0xf301021, 0x7e), 0x3301020, "Spread mismatch.");
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mu_end;
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}
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bool all_tests() {
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mu_run_test(test_rz_bits_count);
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mu_run_test(test_rz_bits_spread);
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mu_run_test(test_rz_bits_trailing_zero);
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return tests_passed != tests_run;
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}
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mu_main(all_tests)
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