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diff --git a/Utilities/cmnghttp2/lib/nghttp2_priority_spec.h b/Utilities/cmnghttp2/lib/nghttp2_priority_spec.h
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+++ b/Utilities/cmnghttp2/lib/nghttp2_priority_spec.h
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+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_PRIORITY_SPEC_H
+#define NGHTTP2_PRIORITY_SPEC_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+/*
+ * This function normalizes pri_spec->weight if it is out of range.
+ * If pri_spec->weight is less than NGHTTP2_MIN_WEIGHT, it is set to
+ * NGHTTP2_MIN_WEIGHT.  If pri_spec->weight is larger than
+ * NGHTTP2_MAX_WEIGHT, it is set to NGHTTP2_MAX_WEIGHT.
+ */
+void nghttp2_priority_spec_normalize_weight(nghttp2_priority_spec *pri_spec);
+
+#endif /* NGHTTP2_PRIORITY_SPEC_H */