Move lib into src

1 files changed, 61 insertions, 0 deletions

diff --git a/src/lib/utils/rounding.h b/src/lib/utils/rounding.h
new file mode 100644
index 000000000..4ddd7a432
--- /dev/null
+++ b/src/lib/utils/rounding.h
@@ -0,0 +1,61 @@
+/*
+* Integer Rounding Functions
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_ROUNDING_H__
+#define BOTAN_ROUNDING_H__
+
+#include <botan/types.h>
+
+namespace Botan {
+
+/**
+* Round up
+* @param n an integer
+* @param align_to the alignment boundary
+* @return n rounded up to a multiple of align_to
+*/
+template<typename T>
+inline T round_up(T n, T align_to)
+   {
+   if(align_to == 0)
+      return n;
+
+   if(n % align_to || n == 0)
+      n += align_to - (n % align_to);
+   return n;
+   }
+
+/**
+* Round down
+* @param n an integer
+* @param align_to the alignment boundary
+* @return n rounded down to a multiple of align_to
+*/
+template<typename T>
+inline T round_down(T n, T align_to)
+   {
+   if(align_to == 0)
+      return n;
+
+   return (n - (n % align_to));
+   }
+
+/**
+* Clamp
+*/
+inline size_t clamp(size_t n, size_t lower_bound, size_t upper_bound)
+   {
+   if(n < lower_bound)
+      return lower_bound;
+   if(n > upper_bound)
+      return upper_bound;
+   return n;
+   }
+
+}
+
+#endif