bitvec: Add bitvec_bytes_used() function

This new bitvec API function returns the number of bytes used in a given
bit-vector.

Change-Id: Id4bd7f7543f5b0f4f6f876e283bd065039c37646

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/bitvec/bitvec_test.c b/tests/bitvec/bitvec_test.c
index d0bc30c4..c8795dbd 100644
--- a/tests/bitvec/bitvec_test.c
+++ b/tests/bitvec/bitvec_test.c
@@ -181,6 +181,29 @@ static void test_array()
 	test_array_item(17, &b, n, array, n * 3);
 }
 
+static void test_used_bytes()
+{
+	struct bitvec b;
+	uint8_t d[32];
+	unsigned int i;
+
+	b.data = d;
+	b.data_len = sizeof(d);
+	bitvec_zero(&b);
+
+	OSMO_ASSERT(bitvec_used_bytes(&b) == 0);
+
+	for (i = 0; i < 8; i++) {
+		bitvec_set_bit(&b, 1);
+		OSMO_ASSERT(bitvec_used_bytes(&b) == 1);
+	}
+
+	for (i = 8; i < 16; i++) {
+		bitvec_set_bit(&b, 1);
+		OSMO_ASSERT(bitvec_used_bytes(&b) == 2);
+	}
+}
+
 int main(int argc, char **argv)
 {
 	struct bitvec bv;
@@ -286,6 +309,9 @@ int main(int argc, char **argv)
 	bitvec_zero(&bv);
 	test_bitvec_rl_curbit(&bv, 1, 64, 0);
 
+	printf("\nbitvec bytes used.\n");
+	test_used_bytes();
+
 	printf("\nbitvec ok.\n");
 	return 0;
 }