Add HpackDecoderTables, static and dynamic tables for decoding HPACK.

net/http2/tools/random_util.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NET_HTTP2_TOOLS_RANDOM_UTIL_H_
+#define NET_HTTP2_TOOLS_RANDOM_UTIL_H_
+
+#include <stddef.h>
+
+#include <string>
+
+#include "base/strings/string_piece.h"
+
+namespace net {
+namespace test {
+
+class RandomBase;
+
+// Returns a random string of length |len|, each character drawn uniformly and
+// independently fom |alphabet|.
+std::string RandomString(RandomBase* rng, int len, base::StringPiece alphabet);
+
+// Returns a random integer in the range [lo, hi).
+size_t GenerateUniformInRange(size_t lo, size_t hi, RandomBase* rng);
+
+// Generate a string with the allowed character set for HTTP/2 / HPACK header
+// names.
+std::string GenerateHttp2HeaderName(size_t len, RandomBase* rng);
+
+// Generate a string with the web-safe string character set of specified len.
+std::string GenerateWebSafeString(size_t len, RandomBase* rng);
+
+// Generate a string with the web-safe string character set of length [lo, hi).
+std::string GenerateWebSafeString(size_t lo, size_t hi, RandomBase* rng);
+
+}  // namespace test
+}  // namespace net
+
+#endif  // NET_HTTP2_TOOLS_RANDOM_UTIL_H_