parser optimization Three

include/chaiscript/utility/fnv1a.hpp

@@ -0,0 +1,22 @@
+// This file is distributed under the BSD License.
+// See "license.txt" for details.
+// Copyright 2009-2012, Jonathan Turner (jonathan@emptycrate.com)
+// Copyright 2009-2016, Jason Turner (jason@emptycrate.com)
+// http://www.chaiscript.com
+
+#ifndef CHAISCRIPT_UTILITY_FNV1A_HPP_
+#define CHAISCRIPT_UTILITY_FNV1A_HPP_
+
+#include <cstdint>
+
+namespace chaiscript
+{
+  namespace utility
+  {
+    static constexpr std::uint32_t fnv1a_32(const char *s, std::uint32_t h = 0x811c9dc5) {
+      return (*s == 0) ? h : fnv1a_32(s+1, ((h ^ (*s)) * 0x01000193));
+    }
+  }
+}
+
+#endif