8273341: Update Siphash to version 1.0

Backport-of: 6cf4cd1aa46414d9af17f3704b27d0d381a17ee8

src/hotspot/share/classfile/altHashing.cpp

@@ -26,18 +26,23 @@
  * halfsiphash code adapted from reference implementation
  * (https://github.com/veorq/SipHash/blob/master/halfsiphash.c)
  * which is distributed with the following copyright:
- *
- * SipHash reference C implementation
- *
- * Copyright (c) 2016 Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>
- *
- * To the extent possible under law, the author(s) have dedicated all copyright
- * and related and neighboring rights to this software to the public domain
- * worldwide. This software is distributed without any warranty.
- *
- * You should have received a copy of the CC0 Public Domain Dedication along
- * with this software. If not, see
- * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+/*
+   SipHash reference C implementation
+
+   Copyright (c) 2012-2021 Jean-Philippe Aumasson
+   <jeanphilippe.aumasson@gmail.com>
+   Copyright (c) 2012-2014 Daniel J. Bernstein <djb@cr.yp.to>
+
+   To the extent possible under law, the author(s) have dedicated all copyright
+   and related and neighboring rights to this software to the public domain
+   worldwide. This software is distributed without any warranty.
+
+   You should have received a copy of the CC0 Public Domain Dedication along
+   with
+   this software. If not, see
+   <http://creativecommons.org/publicdomain/zero/1.0/>.
  */
 
 #include "precompiled.hpp"
@@ -134,7 +139,9 @@ static uint64_t halfsiphash_finish64(uint32_t v[4], int rounds) {
 }
 
 // HalfSipHash-2-4 (32-bit output) for Symbols
-uint32_t AltHashing::halfsiphash_32(uint64_t seed, const uint8_t* data, int len) {
+uint32_t AltHashing::halfsiphash_32(uint64_t seed, const void* in, int len) {
+
+  const unsigned char* data = (const unsigned char*)in;
   uint32_t v[4];
   uint32_t newdata;
   int off = 0;

src/hotspot/share/classfile/altHashing.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -43,7 +43,7 @@ class AltHashing : AllStatic {
   static uint64_t compute_seed();
 
   // For Symbols
-  static uint32_t halfsiphash_32(uint64_t seed, const uint8_t* data, int len);
+  static uint32_t halfsiphash_32(uint64_t seed, const void* in, int len);
   // For Strings
   static uint32_t halfsiphash_32(uint64_t seed, const uint16_t* data, int len);
 };