1 files changed, 65 insertions, 0 deletions
diff --git a/lib/nghttp2_extpri.h b/lib/nghttp2_extpri.h
new file mode 100644
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--- /dev/null
+++ b/lib/nghttp2_extpri.h
@@ -0,0 +1,65 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2022 nghttp3 contributors
+ * Copyright (c) 2022 nghttp2 contributors
+ *
+ * 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_EXTPRI_H
+#define NGHTTP2_EXTPRI_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+/*
+ * NGHTTP2_EXTPRI_INC_MASK is a bit mask to retrieve incremental bit
+ * from a value produced by nghttp2_extpri_to_uint8.
+ */
+#define NGHTTP2_EXTPRI_INC_MASK (1 << 7)
+
+/*
+ * nghttp2_extpri_to_uint8 encodes |pri| into uint8_t variable.
+ */
+uint8_t nghttp2_extpri_to_uint8(const nghttp2_extpri *extpri);
+
+/*
+ * nghttp2_extpri_from_uint8 decodes |u8extpri|, which is produced by
+ * nghttp2_extpri_to_uint8, intto |extpri|.
+ */
+void nghttp2_extpri_from_uint8(nghttp2_extpri *extpri, uint8_t u8extpri);
+
+/*
+ * nghttp2_extpri_uint8_urgency extracts urgency from |PRI| which is
+ * supposed to be constructed by nghttp2_extpri_to_uint8.
+ */
+#define nghttp2_extpri_uint8_urgency(PRI)                                      \
+  ((uint32_t)((PRI) & ~NGHTTP2_EXTPRI_INC_MASK))
+
+/*
+ * nghttp2_extpri_uint8_inc extracts inc from |PRI| which is supposed to
+ * be constructed by nghttp2_extpri_to_uint8.
+ */
+#define nghttp2_extpri_uint8_inc(PRI) (((PRI)&NGHTTP2_EXTPRI_INC_MASK) != 0)
+
+#endif /* NGHTTP2_EXTPRI_H */