[Boost-commit] svn:boost r47144 - in trunk/libs/unordered/examples: . hash_functions

From: daniel_james_at_[hidden]
Date: 2008-07-06 17:07:32

Author: danieljames
Date: 2008-07-06 17:07:31 EDT (Sun, 06 Jul 2008)
New Revision: 47144
URL: http://svn.boost.org/trac/boost/changeset/47144

Log:
I've only got one hash function for release, so no need for its own directory.
Added:
   trunk/libs/unordered/examples/fnv1.hpp   (props changed)
      - copied unchanged from r47143, /trunk/libs/unordered/examples/hash_functions/fnv-1.hpp
Removed:
   trunk/libs/unordered/examples/hash_functions/fnv-1.hpp

Deleted: trunk/libs/unordered/examples/hash_functions/fnv-1.hpp
==============================================================================
--- trunk/libs/unordered/examples/hash_functions/fnv-1.hpp	2008-07-06 17:07:31 EDT (Sun, 06 Jul 2008)
+++ (empty file)
@@ -1,66 +0,0 @@
-
-// Copyright 2008 Daniel James.
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-// This code is also released into the public domain.
-
-// Algorithm from: http://www.isthe.com/chongo/tech/comp/fnv/
-
-#include <string>
-
-namespace hash
-{
-    template <std::size_t FnvPrime, std::size_t OffsetBasis>
-    struct basic_fnv_1
-    {
-        std::size_t operator()(std::string const& text) const
-        {
-            std::size_t hash = OffsetBasis;
-            for(std::string::const_iterator it = text.begin(), end = text.end();
-                    it != end; ++it)
-            {
-                hash *= FnvPrime;
-                hash ^= *it;
-            }
-
-            return hash;
-        }
-    };
-
-    template <std::size_t FnvPrime, std::size_t OffsetBasis>
-    struct basic_fnv_1a
-    {
-        std::size_t operator()(std::string const& text) const
-        {
-            std::size_t hash = OffsetBasis;
-            for(std::string::const_iterator it = text.begin(), end = text.end();
-                    it != end; ++it)
-            {
-                hash ^= *it;
-                hash *= FnvPrime;
-            }
-
-            return hash;
-        }
-    };
-
-    // For 32 bit machines:
-    const std::size_t fnv_prime = 16777619u;
-    const std::size_t fnv_offset_basis = 2166136261u;
-
-    // For 64 bit machines:
-    // const std::size_t fnv_prime = 1099511628211u;
-    // const std::size_t fnv_offset_basis = 14695981039346656037u;
-
-    // For 128 bit machines:
-    // const std::size_t fnv_prime = 309485009821345068724781401u;
-    // const std::size_t fnv_offset_basis = 275519064689413815358837431229664493455u;
-
-    // For 256 bit machines:
-    // const std::size_t fnv_prime = 374144419156711147060143317175368453031918731002211u;
-    // const std::size_t fnv_offset_basis = 100029257958052580907070968620625704837092796014241193945225284501741471925557u;
-
-    typedef basic_fnv_1<fnv_prime, fnv_offset_basis> fnv_1;
-    typedef basic_fnv_1a<fnv_prime, fnv_offset_basis> fnv_1a;
-}