--- /dev/null
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+
+/**
+ @file ocb_ntz.c
+ OCB implementation, internal function, by Tom St Denis
+*/
+
+#include "tomcrypt.h"
+
+#ifdef LTC_OCB_MODE
+
+/**
+ Returns the number of leading zero bits [from lsb up]
+ @param x The 32-bit value to observe
+ @return The number of bits [from the lsb up] that are zero
+*/
+int ocb_ntz(unsigned long x)
+{
+ int c;
+ x &= 0xFFFFFFFFUL;
+ c = 0;
+ while ((x & 1) == 0) {
+ ++c;
+ x >>= 1;
+ }
+ return c;
+}
+
+#endif
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */