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#include <check.h>
#include <stdint.h>
#include <bitfield/bitfield.h>
START_TEST (test_large_bitmask)
{
// yeah, this isn't a public method but I wanted to unit test it to track
// down a bug
extern uint64_t bitmask(int numBits);
uint64_t result = bitmask(32);
fail_if(result != 0xffffffff);
}
END_TEST
START_TEST (test_one_bit_not_swapped)
{
uint64_t data = 0x80;
uint64_t result = getBitField(data, 0, 1, false);
fail_if(result == 1);
}
END_TEST
START_TEST (test_one_bit)
{
uint64_t data = 0x8000000000000000;
uint64_t result = getBitField(data, 0, 1, false);
fail_unless(result == 0x1,
"First bit in 0x%llx was 0x%llx instead of 0x1", data, result);
}
END_TEST
START_TEST (test_32_bit_parse)
{
uint64_t data = 0x0402574d555a0401;
uint64_t result = getBitField(data, 16, 32, false);
uint64_t expectedValue = 0x574d555a;
fail_unless(result == expectedValue,
"Field retrieved in 0x%llx was 0x%llx instead of 0x%llx", data,
result, expectedValue);
}
END_TEST
START_TEST (test_16_bit_parse)
{
uint64_t data = 0xF34DFCFF00000000;
uint64_t result = getBitField(data, 16, 16, false);
uint64_t expectedValue = 0xFCFF;
fail_unless(result == expectedValue,
"Field retrieved in 0x%llx was 0x%llx instead of 0x%llx", data,
result, expectedValue);
}
END_TEST
START_TEST (test_one_byte)
{
uint64_t data = 0xFA00000000000000;
uint64_t result = getBitField(data, 0, 4, false);
fail_unless(result == 0xF,
"First 4 bits in 0x%llx was 0x%llx instead of 0xF", data, result);
result = getBitField(data, 4, 4, false);
fail_unless(result == 0xA,
"First 4 bits in 0x%llx was 0x%llx instead of 0xA", data, result);
result = getBitField(data, 0, 8, false);
fail_unless(result == 0xFA,
"All bits in 0x%llx were 0x%llx instead of 0x%llx", data, result, data);
}
END_TEST
START_TEST (test_multi_byte)
{
uint64_t data = 0x12FA000000000000;
uint64_t result = getBitField(data, 0, 4, false);
fail_unless(result == 0x1,
"First 4 bits in 0x%llx was 0x%llx instead of 0xF", (data >> 60) & 0xF,
result);
result = getBitField(data, 4, 4, false);
fail_unless(result == 0x2,
"Second 4 bits in 0x%llx was 0x%llx instead of 0xA", (data >> 56) & 0xF,
result);
result = getBitField(data, 8, 4, false);
fail_unless(result == 0xF,
"First 4 bits in 0x%llx was 0x%llx instead of 0x1", (data >> 52) & 0xF,
result);
result = getBitField(data, 12, 4, false);
fail_unless(result == 0xA,
"Second 4 bits in 0x%llx was 0x%llx instead of 0x2", (data >> 48) % 0xF,
result);
}
END_TEST
START_TEST (test_get_multi_byte)
{
uint64_t data = 0x12FA000000000000;
uint64_t result = getBitField(data, 0, 9, false);
ck_assert_int_eq(result, 0x25);
}
END_TEST
START_TEST (test_get_off_byte_boundary)
{
uint64_t data = 0x000012FA00000000;
uint64_t result = getBitField(data, 12, 8, false);
ck_assert_int_eq(result, 0x01);
} END_TEST
START_TEST (test_set_field)
{
uint64_t data = 0;
setBitField(&data, 1, 0, 1);
uint64_t result = getBitField(data, 0, 1, false);
ck_assert_int_eq(result, 0x1);
data = 0;
setBitField(&data, 1, 1, 1);
result = getBitField(data, 1, 1, false);
ck_assert_int_eq(result, 0x1);
data = 0;
setBitField(&data, 0xf, 3, 4);
result = getBitField(data, 3, 4, false);
ck_assert_int_eq(result, 0xf);
}
END_TEST
START_TEST (test_set_doesnt_clobber_existing_data)
{
uint64_t data = 0xFFFC4DF300000000;
setBitField(&data, 0x4fc8, 16, 16);
uint64_t result = getBitField(data, 16, 16, false);
fail_unless(result == 0x4fc8,
"Field retrieved in 0x%llx was 0x%llx instead of 0x%x", data, result,
0xc84f);
data = 0x8000000000000000;
setBitField(&data, 1, 21, 1);
fail_unless(data == 0x8000040000000000LLU,
"Expected combined value 0x8000040000000000 but got 0x%llx%llx",
data >> 32, data);
}
END_TEST
START_TEST (test_set_off_byte_boundary)
{
uint64_t data = 0xFFFC4DF300000000;
setBitField(&data, 0x12, 12, 8);
uint64_t result = getBitField(data, 12, 12, false);
ck_assert_int_eq(result,0x12d);
}
END_TEST
START_TEST (test_set_odd_number_of_bits)
{
uint64_t data = 0xFFFC4DF300000000LLU;
setBitField(&data, 0x12, 11, 5);
uint64_t result = getBitField(data, 11, 5, false);
fail_unless(result == 0x12,
"Field set in 0x%llx%llx%llx%llx was 0x%llx instead of 0x%llx", data, result,
0x12);
data = 0xFFFC4DF300000000LLU;
setBitField(&data, 0x2, 11, 5);
result = getBitField(data, 11, 5, false);
fail_unless(result == 0x2,
"Field set in 0x%llx%llx%llx%llx was 0x%llx instead of 0x%llx", data, result,
0x2);
}
END_TEST
START_TEST(test_nth_byte)
{
uint64_t data = 0x00000000F34DFCFF;
uint8_t result = nthByte(data, 0);
uint8_t expected = 0x0;
ck_assert_int_eq(result, expected);
result = nthByte(data, 4);
expected = 0xF3;
ck_assert_int_eq(result, expected);
result = nthByte(data, 5);
expected = 0x4D;
ck_assert_int_eq(result, expected);
result = nthByte(data, 6);
expected = 0xFC;
ck_assert_int_eq(result, expected);
result = nthByte(data, 7);
expected = 0xFF;
ck_assert_int_eq(result, expected);
}
END_TEST
START_TEST (test_get_byte)
{
uint8_t data[4] = {0x12, 0x34, 0x56, 0x78};
uint8_t result = getByte(0, data, sizeof(data));
ck_assert_int_eq(result, 0x12);
result = getByte(3, data, sizeof(data));
ck_assert_int_eq(result, 0x78);
}
END_TEST
START_TEST (test_get_nibble)
{
uint8_t data[4] = {0x12, 0x34, 0x56, 0x78};
uint8_t result = getNibble(0, data, sizeof(data));
ck_assert_int_eq(result, 0x1);
result = getNibble(1, data, sizeof(data));
ck_assert_int_eq(result, 0x2);
result = getNibble(2, data, sizeof(data));
ck_assert_int_eq(result, 0x3);
}
END_TEST
START_TEST (test_get_bits_out_of_range)
{
uint8_t data[4] = {0x12, 0x34, 0x56, 0x78};
uint8_t result[4];
fail_if(copyBitsRightAligned(data, 4, 25, 16, result, 4));
}
END_TEST
START_TEST (test_get_bits)
{
uint8_t data[4] = {0x12, 0x34, 0x56, 0x78};
uint8_t result[4] = {0};
fail_unless(copyBitsRightAligned(data, 4, 0, 16, result, 4));
ck_assert_int_eq(result[0], 0x12);
ck_assert_int_eq(result[1], 0x34);
}
END_TEST
START_TEST (test_get_uneven_bits)
{
uint8_t data[4] = {0x12, 0x34, 0x56, 0x78};
uint8_t result[4] = {0};
fail_unless(copyBitsRightAligned(data, 4, 4, 12, result, 4));
ck_assert_int_eq(result[0], 0x2);
ck_assert_int_eq(result[1], 0x34);
}
END_TEST
Suite* bitfieldSuite(void) {
Suite* s = suite_create("bitfield");
TCase *tc_core = tcase_create("core");
tcase_add_test(tc_core, test_large_bitmask);
tcase_add_test(tc_core, test_one_bit);
tcase_add_test(tc_core, test_one_bit_not_swapped);
tcase_add_test(tc_core, test_one_byte);
tcase_add_test(tc_core, test_16_bit_parse);
tcase_add_test(tc_core, test_32_bit_parse);
tcase_add_test(tc_core, test_multi_byte);
tcase_add_test(tc_core, test_get_multi_byte);
tcase_add_test(tc_core, test_get_off_byte_boundary);
tcase_add_test(tc_core, test_set_field);
tcase_add_test(tc_core, test_set_doesnt_clobber_existing_data);
tcase_add_test(tc_core, test_set_off_byte_boundary);
tcase_add_test(tc_core, test_set_odd_number_of_bits);
tcase_add_test(tc_core, test_nth_byte);
tcase_add_test(tc_core, test_get_byte);
tcase_add_test(tc_core, test_get_nibble);
tcase_add_test(tc_core, test_get_bits);
tcase_add_test(tc_core, test_get_bits_out_of_range);
tcase_add_test(tc_core, test_get_uneven_bits);
suite_add_tcase(s, tc_core);
return s;
}
int main(void) {
int numberFailed;
Suite* s = bitfieldSuite();
SRunner *sr = srunner_create(s);
// Don't fork so we can actually use gdb
srunner_set_fork_status(sr, CK_NOFORK);
srunner_run_all(sr, CK_NORMAL);
numberFailed = srunner_ntests_failed(sr);
srunner_free(sr);
return (numberFailed == 0) ? 0 : 1;
}
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