Tidy up container hash functions:

* Add xxhasher
* Move fnv1a, siphash, spookyto hash/
* Move hash_append, uhash to hash/
* Move hash_speed_test to hash/
* Move hash classes to individual header files
* Remove hardened_hash

beast/hash/impl/hash_speed_test.cpp

@@ -0,0 +1,85 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of Beast: https://github.com/vinniefalco/Beast
+    Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#if BEAST_INCLUDE_BEASTCONFIG
+#include <BeastConfig.h>
+#endif
+#include <beast/container/fnv1a.h>
+#include <beast/container/siphash.h>
+#include <beast/container/xxhasher.h>
+#include <beast/random/rngfill.h>
+#include <beast/random/xor_shift_engine.h>
+#include <beast/unit_test/suite.h>
+#include <array>
+#include <chrono>
+#include <cstdint>
+#include <cstring>
+#include <iomanip>
+#include <random>
+
+namespace beast {
+
+class hash_speed_test : public beast::unit_test::suite
+{
+public:
+    using clock_type =
+        std::chrono::high_resolution_clock;
+    template <class Hasher, std::size_t KeySize>
+    void
+    test (std::string const& what, std::size_t n)
+    {
+        using namespace std;
+        using namespace std::chrono;
+        xor_shift_engine g(1);
+        array<std::uint8_t, KeySize> key;
+        auto const start = clock_type::now();
+        while(n--)
+        {
+            rngfill (key, g);
+            Hasher h;
+            h.append(key.data(), KeySize);
+            volatile size_t temp =
+                static_cast<std::size_t>(h);
+            (void)temp;
+        }
+        auto const elapsed = clock_type::now() - start;
+        log << setw(12) << what << " " <<
+            duration<double>(elapsed) << "s";
+    }
+
+    void
+    run()
+    {
+        enum
+        {
+            N = 100000000
+        };
+
+    #if ! BEAST_NO_XXHASH
+        test<xxhasher,32>   ("xxhash", N);
+    #endif
+        test<fnv1a,32>      ("fnv1a", N);
+        test<siphash,32>    ("siphash", N);
+        pass();
+    }
+};
+
+BEAST_DEFINE_TESTSUITE_MANUAL(hash_speed,container,beast);
+
+} // beast