coleenp@3865: /*
minqi@6351:  * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
coleenp@3865:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
coleenp@3865:  *
coleenp@3865:  * This code is free software; you can redistribute it and/or modify it
coleenp@3865:  * under the terms of the GNU General Public License version 2 only, as
coleenp@3865:  * published by the Free Software Foundation.
coleenp@3865:  *
coleenp@3865:  * This code is distributed in the hope that it will be useful, but WITHOUT
coleenp@3865:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
coleenp@3865:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
coleenp@3865:  * version 2 for more details (a copy is included in the LICENSE file that
coleenp@3865:  * accompanied this code).
coleenp@3865:  *
coleenp@3865:  * You should have received a copy of the GNU General Public License version
coleenp@3865:  * 2 along with this work; if not, write to the Free Software Foundation,
coleenp@3865:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
coleenp@3865:  *
coleenp@3865:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
coleenp@3865:  * or visit www.oracle.com if you need additional information or have any
coleenp@3865:  * questions.
coleenp@3865:  *
coleenp@3865:  */
coleenp@3865: 
coleenp@3865: #ifndef SHARE_VM_CLASSFILE_ALTHASHING_HPP
coleenp@3865: #define SHARE_VM_CLASSFILE_ALTHASHING_HPP
coleenp@3865: 
coleenp@3865: #include "prims/jni.h"
vkempik@10008: #include "memory/allocation.hpp"
coleenp@3865: 
coleenp@3865: /**
vkempik@10008:  * Implementation of alternate more secure hashing.
coleenp@3865:  */
coleenp@3865: 
coleenp@3865: class AltHashing : AllStatic {
coleenp@3865: 
vkempik@10008:   // For the seed computation
vkempik@10008:   static uint64_t halfsiphash_64(const uint32_t* data, int len);
vkempik@10008:   static uint64_t halfsiphash_64(uint64_t seed, const uint32_t* data, int len);
vkempik@10008:  #ifndef PRODUCT
vkempik@10008:    // Hashing functions used for internal testing
vkempik@10009:   static void testHalfsiphash_32_ByteArray();
vkempik@10009:   static void testHalfsiphash_32_CharArray();
vkempik@10008:   static void testHalfsiphash_64_FromReference();
vkempik@10008:  #endif // PRODUCT
vkempik@10008:  public:
vkempik@10008:   static uint64_t compute_seed();
coleenp@3865: 
vkempik@10008:   // For Symbols
vkempik@10009:   static uint32_t halfsiphash_32(uint64_t seed, const uint8_t* data, int len);
vkempik@10008:   // For Strings
vkempik@10009:   static uint32_t halfsiphash_32(uint64_t seed, const uint16_t* data, int len);
coleenp@3865:   NOT_PRODUCT(static void test_alt_hash();)
coleenp@3865: };
coleenp@3865: #endif // SHARE_VM_CLASSFILE_ALTHASHING_HPP