Update hashing algorithm for Processor caches (#1656)

* Use xxHash for CacheID

Signed-off-by: Rémi Achard <[email protected]>

* Using XXH3_128bits

Signed-off-by: Rémi Achard <[email protected]>

Signed-off-by: Rémi Achard <[email protected]>

Author: remia

THIRD-PARTY.md

@@ -9,32 +9,6 @@ In no particular order:
 
 ---------------------------------------------------------------------
 
-MD5, courtesy of L. Peter Deutsch, Aladdin Enterprises.
-http://sourceforge.net/projects/libmd5-rfc/files/
-
-Copyright (C) 1999, 2002 Aladdin Enterprises.  All rights reserved.
-
-This software is provided 'as-is', without any express or implied
-warranty.  In no event will the authors be held liable for any damages
-arising from the use of this software.
-
-Permission is granted to anyone to use this software for any purpose,
-including commercial applications, and to alter it and redistribute it
-freely, subject to the following restrictions:
-
-1. The origin of this software must not be misrepresented; you must not
-   claim that you wrote the original software. If you use this software
-   in a product, an acknowledgment in the product documentation would be
-   appreciated but is not required.
-2. Altered source versions must be plainly marked as such, and must not be
-   misrepresented as being the original software.
-3. This notice may not be removed or altered from any source distribution.
-
-L. Peter Deutsch
-[email protected]
-
----------------------------------------------------------------------
-
 argparse, courtesy of OpenImageIO and Larry Gritz
 http://openimageio.org
 
@@ -229,4 +203,33 @@ England
 
 ---------------------------------------------------------------------
 
+xxHash Library
+Copyright (c) 2012-2021 Yann Collet
+All rights reserved.
+
+BSD 2-Clause License (https://www.opensource.org/licenses/bsd-license.php)
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice, this
+  list of conditions and the following disclaimer in the documentation and/or
+  other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+---------------------------------------------------------------------
+
 If we have left anything out, it is unintentional. Please let us know.

ext/CMakeLists.txt

@@ -6,3 +6,6 @@
 
 # Sample ICC (modified)
 add_subdirectory(sampleicc)
+
+# xxHash
+add_subdirectory(xxHash)

ext/xxHash/CMakeLists.txt

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright Contributors to the OpenColorIO Project.
+
+# xxHash v0.8.1
+# https://github.com/Cyan4973/xxHash
+add_library(xxHash INTERFACE IMPORTED GLOBAL)
+set_target_properties(xxHash PROPERTIES
+    INTERFACE_INCLUDE_DIRECTORIES "${CMAKE_CURRENT_SOURCE_DIR}/src/include"
+)