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360 lines
8.9 KiB
C
360 lines
8.9 KiB
C
/*
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* Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
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* 2019 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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#include <stdint.h>
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#include <string.h>
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#include "embUnit.h"
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#include "bitfield.h"
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static void test_bf_set(void)
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{
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BITFIELD(field, 32U);
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memset(field, 0x00, sizeof(field));
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bf_set(field, 3);
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/* bit idx: 3/8 + 01234567
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* 0x10 == 0b00010000 */
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TEST_ASSERT_EQUAL_INT(0x10, field[3 / 8]);
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bf_set(field, 1);
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/* bit idx: 1/8 + 01234567
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* 0x50 == 0b01010000 */
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TEST_ASSERT_EQUAL_INT(0x50, field[1 / 8]);
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bf_set(field, 25);
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/* bit idx: 25/8 + 01234567
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* 0x40 == 0b01000000 */
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TEST_ASSERT_EQUAL_INT(0x40, field[25 / 8]);
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}
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static void test_bf_unset(void)
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{
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BITFIELD(field, 32U);
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memset(field, 0xff, sizeof(field));
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bf_unset(field, 5);
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/* bit idx: 5/8 + 01234567
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* 0xfb == 0b11111011 */
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TEST_ASSERT_EQUAL_INT(0xfb, field[5 / 8]);
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bf_unset(field, 8);
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/* cppcheck-suppress duplicateExpression
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* reason: intentionally dividing 8 by itself to make test more readable
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* bit idx: 8/8 + 01234567
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* 0x7f == 0b01111111 */
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TEST_ASSERT_EQUAL_INT(0x7f, field[8 / 8]);
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bf_unset(field, 10);
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/* bit idx: 10/8 + 01234567
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* 0x5f == 0b01011111 */
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TEST_ASSERT_EQUAL_INT(0x5f, field[10 / 8]);
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}
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static void test_bf_toggle(void)
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{
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BITFIELD(field, 32U);
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memset(field, 0xff, sizeof(field));
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bf_toggle(field, 7);
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/* bit idx: 7/8 + 01234567
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* 0xfe == 0b11111110 */
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TEST_ASSERT_EQUAL_INT(0xfe, field[7 / 8]);
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bf_toggle(field, 0);
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/* bit idx: 0/8 + 01234567
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* 0x7e == 0b01111110 */
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TEST_ASSERT_EQUAL_INT(0x7e, field[0 / 8]);
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bf_toggle(field, 7);
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/* bit idx: 7/8 + 01234567
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* 0x7f == 0b01111111 */
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TEST_ASSERT_EQUAL_INT(0x7f, field[7 / 8]);
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bf_toggle(field, 0);
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/* bit idx: 0/8 + 01234567
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* 0xff == 0b11111111 */
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TEST_ASSERT_EQUAL_INT(0xff, field[0 / 8]);
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bf_toggle(field, 28);
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/* bit idx: 28/8 + 01234567
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* 0xf7 == 0b11110111 */
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TEST_ASSERT_EQUAL_INT(0xf7, field[28 / 8]);
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}
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static void test_bf_isset(void)
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{
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BITFIELD(field, 32U);
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/* bf_set / bf_unset tested above */
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memset(field, 0x00, sizeof(field));
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TEST_ASSERT(!bf_isset(field, 25));
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bf_set(field, 25);
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TEST_ASSERT(bf_isset(field, 25));
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bf_unset(field, 25);
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TEST_ASSERT(!bf_isset(field, 25));
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}
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static void test_bf_get_unset_empty(void)
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{
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int res = 0;
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uint8_t field[5];
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memset(field, 0, sizeof(field));
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res = bf_get_unset(field, 0);
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TEST_ASSERT_EQUAL_INT(-1, res);
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memset(field, 0, sizeof(field));
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res = bf_get_unset(field, 1);
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TEST_ASSERT_EQUAL_INT(0, res);
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memset(field, 0, sizeof(field));
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res = bf_get_unset(field, 3);
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TEST_ASSERT_EQUAL_INT(0, res);
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memset(field, 0, sizeof(field));
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res = bf_get_unset(field, 8);
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TEST_ASSERT_EQUAL_INT(0, res);
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memset(field, 0, sizeof(field));
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res = bf_get_unset(field, 9);
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TEST_ASSERT_EQUAL_INT(0, res);
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memset(field, 0, sizeof(field));
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(0, res);
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}
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static void test_bf_get_unset_firstbyte(void)
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{
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int res = 0;
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uint8_t field[5];
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memset(field, 0xff, sizeof(field));
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field[0] = 0x00;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(0, res);
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field[0] = 0x80;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(1, res);
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field[0] = 0xf0;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(4, res);
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field[0] = 0xfe;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(7, res);
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field[0] = 0xff;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(-1, res);
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}
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static void test_bf_get_unset_middle(void)
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{
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int res = 0;
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uint8_t field[5];
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memset(field, 0xff, sizeof(field));
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field[2] = 0x00;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(16, res);
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field[2] = 0x80;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(17, res);
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field[2] = 0xf0;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(20, res);
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field[2] = 0xfe;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(23, res);
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}
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static void test_bf_get_unset_lastbyte(void)
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{
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int res = 0;
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uint8_t field[5];
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memset(field, 0xff, sizeof(field));
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field[4] = 0x00;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(32, res);
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field[4] = 0x80;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(33, res);
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field[4] = 0xf0;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(36, res);
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field[4] = 0xfe;
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res = bf_get_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(39, res);
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}
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static void test_bf_ops(void)
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{
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const uint8_t zero[3] = {0};
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const uint8_t set[3] = { 0xFF, 0xFF, 0xFF };
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uint8_t a[3] = { 0xAA, 0x55, 0xF0 };
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uint8_t b[3] = { 0x55, 0xAA, 0x0F };
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uint8_t c[3];
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bf_or(c, a, b, 24);
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TEST_ASSERT_EQUAL_INT(0, memcmp(c, set, sizeof(c)));
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bf_inv(c, c, 24);
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TEST_ASSERT_EQUAL_INT(0, memcmp(c, zero, sizeof(c)));
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bf_and(c, a, b, 24);
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TEST_ASSERT_EQUAL_INT(0, memcmp(c, zero, sizeof(c)));
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bf_inv(c, c, 24);
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TEST_ASSERT_EQUAL_INT(0, memcmp(c, set, sizeof(c)));
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bf_xor(c, c, a, 24);
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TEST_ASSERT_EQUAL_INT(0, memcmp(c, b, sizeof(c)));
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}
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static void test_bf_find_first_set(void)
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{
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int res;
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uint8_t field[5];
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memset(field, 0, sizeof(field));
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res = bf_find_first_set(field, 40);
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TEST_ASSERT_EQUAL_INT(-1, res);
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bf_set(field, 23);
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res = bf_find_first_set(field, 40);
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TEST_ASSERT_EQUAL_INT(23, res);
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bf_set(field, 24);
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res = bf_find_first_set(field, 40);
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TEST_ASSERT_EQUAL_INT(23, res);
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bf_set(field, 13);
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res = bf_find_first_set(field, 40);
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TEST_ASSERT_EQUAL_INT(13, res);
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bf_set(field, 3);
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res = bf_find_first_set(field, 40);
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TEST_ASSERT_EQUAL_INT(3, res);
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}
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static void test_bf_find_first_unset(void)
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{
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int res;
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uint8_t field[5];
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memset(field, 0xff, sizeof(field));
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res = bf_find_first_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(-1, res);
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bf_unset(field, 23);
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res = bf_find_first_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(23, res);
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bf_unset(field, 24);
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res = bf_find_first_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(23, res);
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bf_unset(field, 13);
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res = bf_find_first_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(13, res);
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bf_unset(field, 3);
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res = bf_find_first_unset(field, 40);
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TEST_ASSERT_EQUAL_INT(3, res);
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}
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static void test_bf_set_all(void)
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{
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uint8_t field[5];
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memset(field, 0, sizeof(field));
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bf_set_all(field, 5);
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TEST_ASSERT_EQUAL_INT(0xf8, field[0]);
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TEST_ASSERT_EQUAL_INT(0, field[1]);
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memset(field, 0, sizeof(field));
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bf_set_all(field, 24);
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TEST_ASSERT_EQUAL_INT(0xff, field[0]);
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TEST_ASSERT_EQUAL_INT(0xff, field[1]);
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TEST_ASSERT_EQUAL_INT(0xff, field[2]);
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TEST_ASSERT_EQUAL_INT(0, field[3]);
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memset(field, 0, sizeof(field));
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bf_set_all(field, 30);
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TEST_ASSERT_EQUAL_INT(0xff, field[0]);
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TEST_ASSERT_EQUAL_INT(0xff, field[1]);
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TEST_ASSERT_EQUAL_INT(0xff, field[2]);
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TEST_ASSERT_EQUAL_INT(0xfc, field[3]);
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TEST_ASSERT_EQUAL_INT(0, field[4]);
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}
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static void test_bf_clear_all(void)
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{
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uint8_t field[5];
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memset(field, 0xFF, sizeof(field));
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bf_clear_all(field, 5);
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TEST_ASSERT_EQUAL_INT(0x7, field[0]);
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TEST_ASSERT_EQUAL_INT(0xFF, field[1]);
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}
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static void test_bf_popcnt(void)
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{
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uint8_t field[5];
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memset(field, 0xff, sizeof(field));
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bf_set_all(field, 5);
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TEST_ASSERT_EQUAL_INT(5, bf_popcnt(field, 5));
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field[0] = 0x1;
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field[1] = 0x80;
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TEST_ASSERT_EQUAL_INT(2, bf_popcnt(field, 9));
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field[0] = 0x0;
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field[1] = 0x0;
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TEST_ASSERT_EQUAL_INT(0, bf_popcnt(field, 16));
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field[0] = 0xff;
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field[1] = 0xff;
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TEST_ASSERT_EQUAL_INT(16, bf_popcnt(field, 16));
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}
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Test *tests_bitfield_tests(void) {
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EMB_UNIT_TESTFIXTURES(fixtures) {
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new_TestFixture(test_bf_set),
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new_TestFixture(test_bf_unset),
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new_TestFixture(test_bf_toggle),
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new_TestFixture(test_bf_isset),
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new_TestFixture(test_bf_get_unset_empty),
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new_TestFixture(test_bf_get_unset_firstbyte),
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new_TestFixture(test_bf_get_unset_middle),
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new_TestFixture(test_bf_get_unset_lastbyte),
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new_TestFixture(test_bf_ops),
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new_TestFixture(test_bf_find_first_set),
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new_TestFixture(test_bf_find_first_unset),
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new_TestFixture(test_bf_set_all),
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new_TestFixture(test_bf_clear_all),
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new_TestFixture(test_bf_popcnt),
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};
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EMB_UNIT_TESTCALLER(bitfield_tests, NULL, NULL, fixtures);
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return (Test *)&bitfield_tests;
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}
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void tests_bitfield(void)
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{
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TESTS_RUN(tests_bitfield_tests());
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}
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