1 files changed, 35 insertions, 0 deletions
diff --git a/random_signed.c b/random_signed.c
new file mode 100644
index 0000000..13d5f3b
--- /dev/null
+++ b/random_signed.c
@@ -0,0 +1,35 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+intmax_t
+libsimple_random_signed(uintmax_t (*rng)(size_t bits, void *user), void *user, intmax_t min, intmax_t max) /* TODO add test */
+{
+	uintmax_t range, offset, t, r;
+	size_t bits = 0;
+
+	range = libsimple_imaxabs(max, min);
+	offset = (uintmax_t)MIN(min, max);
+
+	for (t = range; t; t >>= 1)
+		bits += 1;
+
+	do {
+		r = (*rng)(bits, user);
+	} while (r > range);
+
+	return libsimple_toimax(r + offset);
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	return 0;
+}
+
+#endif