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| author | Wai-Hong Tam <waihong@google.com> | 2021-06-15 15:43:06 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-06-16 04:30:15 +0000 |
| commit | 504216c9b3df0af440ce86571136bb7dc005fc02 (patch) | |
| tree | c0e1400644b9005a4593ac73f42dff99ad8fee3b /test | |
| parent | ce149d30f144c952fe4ebf617b1e30ed0b0b3c8e (diff) | |
| download | chrome-ec-504216c9b3df0af440ce86571136bb7dc005fc02.tar.gz | |
util: Add function to convert binary first base3 number
Add an util function to convert a ternary bit array (each element is
either 0, 1, or 2) to a non-standard ternary number system where the
first 2^n natural numbers are represented as they would be in a
binary system (without any Z digits) and the following 3^n-2^n numbers
use the remaining ternary representations in the normal ternary system
order (skipping the values that were already used up).
This function is useful for converting BOARd ID, which is initially
used a binary and later decided to switch to tri-state after some
revisions have already been built.
BRANCH=Trogdor
BUG=b:190250108
TEST=make runhosttests
Change-Id: I853a04f3b28eb54c61855251dc5232c7e6994fef
Signed-off-by: Wai-Hong Tam <waihong@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2964389
Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'test')
| -rw-r--r-- | test/utils.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/test/utils.c b/test/utils.c index 82316a53cc..9402e92740 100644 --- a/test/utils.c +++ b/test/utils.c @@ -481,6 +481,30 @@ test_static int test_alignment_log2(void) return EC_SUCCESS; } +test_static int test_binary_first_base3_from_bits(void) +{ + int n0[] = {0, 0, 0}; /* LSB first */ + int n7[] = {1, 1, 1}; + int n8[] = {2, 0, 0}; + int n9[] = {2, 1, 0}; + int n10[] = {0, 2, 0}; + int n11[] = {1, 2, 0}; + int n18[] = {0, 0, 2}; + int n26[] = {2, 2, 2}; + int n38[] = {1, 2, 0, 1}; + + TEST_EQ(binary_first_base3_from_bits(n0, ARRAY_SIZE(n0)), 0, "%d"); + TEST_EQ(binary_first_base3_from_bits(n7, ARRAY_SIZE(n7)), 7, "%d"); + TEST_EQ(binary_first_base3_from_bits(n8, ARRAY_SIZE(n8)), 8, "%d"); + TEST_EQ(binary_first_base3_from_bits(n9, ARRAY_SIZE(n9)), 9, "%d"); + TEST_EQ(binary_first_base3_from_bits(n10, ARRAY_SIZE(n10)), 10, "%d"); + TEST_EQ(binary_first_base3_from_bits(n11, ARRAY_SIZE(n11)), 11, "%d"); + TEST_EQ(binary_first_base3_from_bits(n18, ARRAY_SIZE(n18)), 18, "%d"); + TEST_EQ(binary_first_base3_from_bits(n26, ARRAY_SIZE(n26)), 26, "%d"); + TEST_EQ(binary_first_base3_from_bits(n38, ARRAY_SIZE(n38)), 38, "%d"); + return EC_SUCCESS; +} + void run_test(int argc, char **argv) { test_reset(); @@ -502,6 +526,7 @@ void run_test(int argc, char **argv) RUN_TEST(test_is_aligned); RUN_TEST(test_safe_memcmp); RUN_TEST(test_alignment_log2); + RUN_TEST(test_binary_first_base3_from_bits); test_print_result(); } |