1 files changed, 27 insertions, 0 deletions
diff --git a/modules/woff2/src/round.h b/modules/woff2/src/round.h
new file mode 100644
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+++ b/modules/woff2/src/round.h
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+/* Copyright 2013 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+/* Helper for rounding */
+
+#ifndef WOFF2_ROUND_H_
+#define WOFF2_ROUND_H_
+
+#include <limits>
+
+namespace woff2 {
+
+// Round a value up to the nearest multiple of 4. Don't round the value in the
+// case that rounding up overflows.
+template<typename T> T Round4(T value) {
+  if (std::numeric_limits<T>::max() - value < 3) {
+    return value;
+  }
+  return (value + 3) & ~3;
+}
+
+} // namespace woff2
+
+#endif  // WOFF2_ROUND_H_