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-rw-r--r--random_unsigned.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/random_unsigned.c b/random_unsigned.c
new file mode 100644
index 0000000..f39392d
--- /dev/null
+++ b/random_unsigned.c
@@ -0,0 +1,40 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+uintmax_t
+libsimple_random_unsigned(uintmax_t (*rng)(size_t bits, void *user), void *user, uintmax_t min, uintmax_t max) /* TODO add test */
+{
+ uintmax_t range, offset, t, r;
+ size_t bits = 0;
+
+ if (min < max) {
+ range = max - min;
+ offset = min;
+ } else {
+ range = min - max;
+ offset = max;
+ }
+
+ for (t = range; t; t >>= 1)
+ bits += 1;
+
+ do {
+ r = (*rng)(bits, user);
+ } while (r > range);
+
+ return r + offset;
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+ return 0;
+}
+
+#endif