xxHash/xxhash.c

/*
*  xxHash - Fast Hash algorithm
*  Copyright (C) 2012-2016, Yann Collet
*
*  BSD 2-Clause License (http://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
*  OWNER 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.
*
*  You can contact the author at :
*  - xxHash homepage: http://www.xxhash.com
*  - xxHash source repository : https://github.com/Cyan4973/xxHash
*/


/* xxhash.c instantiates functions defined in xxhash.h
 */

#define XXH_STATIC_LINKING_ONLY   /* access advanced declarations */
#define XXH_IMPLEMENTATION   /* access definitions */

#include "xxhash.h"
Fixed crlf issue 2014-08-15 09:27:04 +00:00			`/*`
changed bracket convention 2016-04-08 01:22:40 +00:00			`* xxHash - Fast Hash algorithm`
			`* Copyright (C) 2012-2016, Yann Collet`
			`*`
			`* BSD 2-Clause License (http://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`
			`* OWNER 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.`
			`*`
			`* You can contact the author at :`
			`* - xxHash homepage: http://www.xxhash.com`
			`* - xxHash source repository : https://github.com/Cyan4973/xxHash`
Fixed crlf issue 2014-08-15 09:27:04 +00:00			`*/`


xxhash can be inlined even if it was previously included Inlining hash functions is generally beneficial for performance. It becomes extremely beneficial whenever input size is a compile-time constant. To inline xxhash functions, one just needs to include it this way : One potential issue is that "xxhash.h" may have already been included previously, typically as part of another included `*.h` . In which case, the second `#include` statement will have no effect. This patch fixes this situation : now, when XXH_INLINE_ALL is defined, all identifiers are renamed, in order to avoid name collision and confusion with already included indentifiers. The renaming process uses XXH_NAMESPACE. XXH_NAMESPACE must be available (i.e. not already used) for renaming to work. A test has been added in `tests/` to ensure this scenario works correctly. 2020-02-12 19:43:33 +00:00			`/* xxhash.c instantiates functions defined in xxhash.h`
xxhash.c is C90 compatible 2014-12-17 11:15:03 +00:00			`*/`
Fixed crlf issue 2014-08-15 09:27:04 +00:00
transferred implementation inside xxhash.h instead of xxhash.c . This seems preferable for some build systems, which don't like the `#include "xxhash.c"` statement when inlining xxhash, as reported by @pdillinger . Note that `xxhash.c` still exists, it just includes the implementation and instantiates it. 2019-11-04 23:53:35 +00:00			`#define XXH_STATIC_LINKING_ONLY /* access advanced declarations */`
			`#define XXH_IMPLEMENTATION /* access definitions */`
code refactoring, introduce XXH64_mergeRound() to simplify code. change library version to v0.5.2 2016-05-26 00:54:16 +00:00
			`#include "xxhash.h"`