initial commit with rc for skalibs-2.0.0.0

1 files changed, 35 insertions, 0 deletions

diff --git a/src/librandom/random_mask2.c b/src/librandom/random_mask2.c
new file mode 100644
index 0000000..ab8c8e7
--- /dev/null
+++ b/src/librandom/random_mask2.c
@@ -0,0 +1,35 @@
+/* ISC license. */
+
+#include <skalibs/sysdeps.h>
+#include "random-internal.h"
+
+unsigned int random_mask2 (register unsigned int n)
+{
+  for (;;)
+  {
+    register unsigned int m = n | (n >> 1) ;
+    if (m == n) return n ;
+    n = m ;
+  }
+}
+
+unsigned int random_nchars (register unsigned int n)
+{
+  return n <= 0xff ? 1 :
+#if SKALIBS_SIZEOFUINT == 2
+  2
+#else
+         n <= 0xffff ? 2 :
+         n <= 0xffffffUL ? 3 :
+# if SKALIBS_SIZEOFUINT == 4
+  4
+# else
+         n <= 0xffffffffUL ? 4 :
+         n <= 0xffffffffffULL ? 5 :
+         n <= 0xffffffffffffULL ? 6 :
+         n <= 0xffffffffffffffULL ? 7 :
+  8
+# endif
+#endif
+ ;
+}