1 files changed, 39 insertions, 0 deletions
diff --git a/libj2_j2u_test_bit.c b/libj2_j2u_test_bit.c
new file mode 100644
index 0000000..2d4661b
--- /dev/null
+++ b/libj2_j2u_test_bit.c
@@ -0,0 +1,39 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+extern inline int libj2_j2u_test_bit(const struct libj2_j2u *a, unsigned b);
+/* TODO Add man page */
+
+
+#else
+
+int
+main(void)
+{
+	struct libj2_j2u a;
+	unsigned i, j, k;
+
+	for (k = 1; k <= 10; k++) {
+		for (j = 0; j < k; j++) {
+			a.high = 0;
+			a.low = 0;
+			for (i = 0; i < LIBJ2_J2U_BIT; i++) {
+				if (i % k != j)
+					continue;
+				if (i < LIBJ2_JU_BIT)
+					a.low |= (uintmax_t)1 << i;
+				else
+					a.high |= (uintmax_t)1 << (i - LIBJ2_JU_BIT);
+			}
+			for (i = 0; i < LIBJ2_J2U_BIT; i++)
+				EXPECT(libj2_j2u_test_bit(&a, i) == (i % k == j));
+			for (i = LIBJ2_J2U_BIT; i < 2U * LIBJ2_J2U_BIT; i++)
+				EXPECT(libj2_j2u_test_bit(&a, i) == 0);
+		}
+	}
+
+	return 0;
+}
+
+#endif