Initial commit, pulled from openxc/vi-firmware.

1 files changed, 225 insertions, 0 deletions

diff --git a/tests/bitfield_tests.c b/tests/bitfield_tests.c
new file mode 100644
index 00000000..d248989b
--- /dev/null
+++ b/tests/bitfield_tests.c
@@ -0,0 +1,225 @@
+#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 bits in 0x%X was 0x%X 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%X was 0x%X instead of %d", 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%X was 0x%X instead of %d", 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%X was 0x%X instead of 0xF", data, result);
+    result = getBitField(data, 4, 4, false);
+    fail_unless(result == 0xA,
+            "First 4 bits in 0x%X was 0x%X instead of 0xA", data, result);
+    result = getBitField(data, 0, 8, false);
+    fail_unless(result == 0xFA,
+            "All bits in 0x%X were 0x%X instead of 0x%X", 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%X was 0x%X instead of 0xF", (data >> 60) & 0xF,
+            result);
+    result = getBitField(data, 4, 4, false);
+    fail_unless(result == 0x2,
+            "Second 4 bits in 0x%X was %d instead of 0xA", (data >> 56) & 0xF,
+            result);
+    result = getBitField(data, 8, 4, false);
+    fail_unless(result == 0xF,
+            "First 4 bits in 0x%X was %d instead of 0x1", (data >> 52) & 0xF,
+            result);
+    result = getBitField(data, 12, 4, false);
+    fail_unless(result == 0xA,
+            "Second 4 bits in 0x%X was %d 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%X was 0x%X 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%X%X",
+            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%X%X%X%X was %d instead of %d", data, result,
+            0x12);
+
+    data = 0xFFFC4DF300000000LLU;
+    setBitField(&data, 0x2, 11, 5);
+    result = getBitField(data, 11, 5, false);
+    fail_unless(result == 0x2,
+            "Field set in 0x%X%X%X%X was %d instead of %d", 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
+
+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);
+    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;
+}