Initial commit
Manually copied these files from
github.com/google/farmhash as some other files
were deemed by OSRB to be problematic.
Bug: 43770
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..8176e66
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,19 @@
+// Copyright (c) 2014 Google, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..1732717
--- /dev/null
+++ b/NEWS
@@ -0,0 +1,19 @@
+FarmHash v1.1, March 1, 2015
+
+ * Added a new 64-bit hash function (namespace farmhashte) that is
+ substantially faster for long strings. It requires SSE4.1. If
+ AVX instructions are available then it should be slightly faster (e.g.,
+ use g++ -mavx).
+ * Added a 32-bit hash function trivially derived from the above. Useful
+ on CPUs with SSE4.1 or AVX.
+ * Added new 64-bit hash functions derived from FarmHash v1.0
+ (namespaces farmhashuo and farmhashxo). My testing suggests that for
+ some string lengths these are speedier than the old standby (farmhashna).
+ * Compiling with FARMHASH_NO_BUILTIN_EXPECT defined will now eliminate
+ FarmHash's usage of __builtin_expect. Thanks to Cory Riddell for
+ suggesting this.
+ * Improved some comments, the README, etc.
+
+FarmHash v1.0, March 31, 2014
+
+ * Initial release
diff --git a/README b/README
new file mode 100644
index 0000000..146936d
--- /dev/null
+++ b/README
@@ -0,0 +1,163 @@
+FarmHash, a family of hash functions.
+Version 1.1
+
+Introduction
+============
+
+A general overview of hash functions and their use is available in the file
+Understanding_Hash_Functions in this directory. It may be helpful to read it
+before using FarmHash.
+
+FarmHash provides hash functions for strings and other data. The functions
+mix the input bits thoroughly but are not suitable for cryptography. See
+"Hash Quality," below, for details on how FarmHash was tested and so on.
+
+We provide reference implementations in C++, with a friendly MIT license.
+
+All members of the FarmHash family were designed with heavy reliance on
+previous work by Jyrki Alakuijala, Austin Appleby, Bob Jenkins, and others.
+
+
+Recommended Usage
+=================
+
+Our belief is that the typical hash function is mostly used for in-memory hash
+tables and similar. That use case allows hash functions that differ on
+different platforms, and that change from time to time. For this, I recommend
+using wrapper functions in a .h file with comments such as, "may change from
+time to time, may differ on different platforms, and may change depending on
+NDEBUG."
+
+Some projects may also require a forever-fixed, portable hash function. Again
+we recommend using wrapper functions in a .h, but in this case the comments on
+them would be very different.
+
+We have provided a sample of these wrapper functions in src/farmhash.h. Our
+hope is that most people will need nothing more than src/farmhash.h and
+src/farmhash.cc. Those two files are a usable and relatively portable library.
+(One portability snag: if your compiler doesn't have __builtin_expect then
+you may need to define FARMHASH_NO_BUILTIN_EXPECT.) For those that prefer
+using a configure script (perhaps because they want to "make install" later),
+FarmHash has one, but for many people it's best to ignore it.
+
+Note that the wrapper functions such as Hash() in src/farmhash.h can select
+one of several hash functions. The selection is done at compile time, based
+on your machine architecture (e.g., sizeof(size_t)) and the availability of
+vector instructions (e.g., SSE4.1).
+
+To get the best performance from FarmHash, one will need to think a bit about
+when to use compiler flags that allow vector instructions and such: -maes,
+-msse4.2, -mavx, etc., or their equivalents for other compilers. Those are
+the g++ flags that make g++ emit more types of machine instructions than it
+otherwise would. For example, if you are confident that you will only be
+using FarmHash on systems with SSE4.2 and/or AES, you may communicate that to
+the compiler as explained in src/farmhash.cc. If not, use -maes, -mavx, etc.,
+when you can, and the appropriate choices will be made by via conditional
+compilation in src/farmhash.cc.
+
+It may be beneficial to try -O3 or other compiler flags as well. I also have
+found feedback-directed optimization (FDO) to improve the speed of FarmHash.
+
+The "configure" script: creating config.h
+=========================================
+
+We provide reference implementations of several FarmHash functions, written in
+C++. The build system is based on autoconf. It defaults the C++ compiler
+flags to "-g -O2", which may or may not be best.
+
+If you are planning to use the configure script, I generally recommend
+trying this first, unless you know that your system lacks AVX and/or AESNI:
+
+ ./configure CXXFLAGS="-g -mavx -maes -O3"
+ make all check
+
+If that fails, you can retry with -mavx and/or -maes removed, or with -mavx replaced by
+-msse4.1 or -msse4.2.
+
+Please see below for thoughts on cross-platform testing, if that is a concern.
+Finally, if you want to install a library, you may use
+
+ make install
+
+Some useful flags for configure include:
+
+ --enable-optional-builtin-expect: This causes __builtin_expect to be optional.
+ If you don't use this flag, the assumption is that FarmHash will be compiled
+ with compilers that provide __builtin_expect. In practice, some FarmHash
+ variants may be slightly faster if __builtin_expect is available, but it
+ isn't very important and affects speed only.
+
+Further Details
+===============
+
+The above instructions will produce a single source-level library that
+includes multiple hash functions. It will use conditional compilation, and
+perhaps GCC's multiversioning, to select among the functions. In addition,
+"make all check" will create an object file using your chosen compiler, and
+test it. The object file won't necessarily contain all the code that would be
+used if you were to compile the code on other platforms. The downside of this
+is obvious: the paths not tested may not actually work if and when you try
+them. The FarmHash developers try hard to prevent such problems; please let
+us know if you find bugs.
+
+To aid your cross-platform testing, for each relevant platform you may
+compile your program that uses farmhash.cc with the preprocessor flag
+FARMHASHSELFTEST equal to 1. This causes a FarmHash self test to run
+at program startup; the self test writes output to stdout and then
+calls std::exit(). You can see this in action by running "make check":
+see src/farm-test.cc for details.
+
+There's also a trivial workaround to force particular functions to be used:
+modify the wrapper functions in hash.h. You can prevent choices being made via
+conditional compilation or multiversioning by choosing FarmHash variants with
+names like farmhashaa::Hash32, farmhashab::Hash64, etc.: those compute the same
+hash function regardless of conditional compilation, multiversioning, or
+endianness. Consult their comments and ifdefs to learn their requirements: for
+example, they are not all guaranteed to work on all platforms.
+
+Known Issues
+============
+
+1) FarmHash was developed with little-endian architectures in mind. It should
+work on big-endian too, but less work has gone into optimizing for those
+platforms. To make FarmHash work properly on big-endian platforms you may
+need to modify the wrapper .h file and/or your compiler flags to arrange for
+FARMHASH_BIG_ENDIAN to be defined, though there is logic that tries to figure
+it out automatically.
+
+2) FarmHash's implementation is fairly complex.
+
+3) The techniques described in dev/INSTRUCTIONS to let hash function
+developers regenerate src/*.cc from dev/* are hacky and not so portable.
+
+Hash Quality
+============
+
+We like to test hash functions with SMHasher, among other things.
+SMHasher isn't perfect, but it seems to find almost any significant flaw.
+SMHasher is available at http://code.google.com/p/smhasher/
+
+SMHasher is designed to pass a 32-bit seed to the hash functions it tests.
+For our functions that accept a seed, we use the given seed directly (padded
+with zeroes as needed); for our functions that don't accept a seed, we hash
+the concatenation of the given seed and the input string.
+
+Some minor flaws in 32-bit and 64-bit functions are harmless, as we
+expect the primary use of these functions will be in hash tables. We
+may have gone slightly overboard in trying to please SMHasher and other
+similar tests, but we don't want anyone to choose a different hash function
+because of some minor issue reported by a quality test.
+
+If your setup is similar enough to mine, it's easy to use SMHasher and other
+tools yourself via the "builder" in the dev directory. See dev/INSTRUCTIONS.
+(Improvements to that directory are a relatively low priority, and code
+there is never going to be as portable as the other parts of FarmHash.)
+
+For more information
+====================
+
+http://code.google.com/p/farmhash/
+
+farmhash-discuss@googlegroups.com
+
+Please feel free to send us comments, questions, bug reports, or patches.
diff --git a/Understanding_Hash_Functions b/Understanding_Hash_Functions
new file mode 100644
index 0000000..8d203c4
--- /dev/null
+++ b/Understanding_Hash_Functions
@@ -0,0 +1,162 @@
+UNDERSTANDING HASH FUNCTIONS
+by Geoff Pike
+
+Version 0.2 --- early draft --- comments and questions welcome!
+References appear in square brackets.
+
+1 INTRODUCTION
+
+Hashing has proven tremendously useful in constructing various fast
+data structures and algorithms. It is typically possible to simplify
+the analysis of hash-based algorithms if one assumes that the relevant
+hash functions are high quality. At the other extreme, if the
+relevant hash functions were always to return the same value, many
+hash-based algorithms become algorithms that are slower, simpler, but still well-known.
+For example, a chaining hash table devolves into a linked list.
+
+There are many possible definitions of hash function quality. For
+example, one might want a list of keys and their hashes to provide no
+pattern that would allow an opponent to predict anything about the
+hashes of other keys. Although I cannot prove it, I think I can meet
+this and many other definitions of quality with
+
+ f(s) = SHA-3(concatenation of z and s),
+
+where z is some secret string known only to me. This well-known trick
+provides, I think, more high-quality hash functions than anyone will
+need, though greater computational power in the future may push us to
+replace SHA-3 from time to time.
+
+In short, discussions about choosing a hash function are almost always
+discussions about speed, energy consumption, or similar. Concerns
+about hash quality are easy to fix, for a price.
+
+2 ANATOMY OF A HASH FUNCTION
+
+Hash functions that input strings of arbitrary length are written in
+terms of an internal state, S. In many cases the internal state is a
+fixed number of bits and will fit in machine registers. One generic
+sketch of a string hash is:
+
+ let S = some initial value
+ let c = the length of S in bits
+ while (input is not exhausted) {
+ let t = the next c bits of input (padded with zeroes if less than c remain)
+ S = M(S xor t)
+ }
+ let n = the number of bytes hashed
+ return F(S, n)
+
+where M is a hash function that inputs and outputs c bits, and F is a
+hash function that inputs c bits (plus, say, 64 for its second argument)
+and outputs however many bits one needs to return. In some sense we have
+reduced the string-hashing problem to two integer hashing problems.
+
+2.1 INTEGER HASHING TECHNIQUES
+
+A hash function that inputs and outputs the same number of bits, say,
+32, can use reversible bit-twiddling operations, each of which is
+"onto" in the mathematical sense. For example, multiplication by an
+odd constant is reversible, as all odd numbers are relatively prime to
+2^32. Other commonly used reversible operations include:
+ o Adding or xoring a constant
+ o Bitwise rotation or other bitwise permutations
+ o bit j = (bit j) xor (bit k) for unequal constants j and k
+ o "Shift mix": S = S xor (S >> k), where k is, say, 17
+ o Replacing a fixed-length bit string with its cyclic redundancy
+ checksum, perhaps via _mm_crc32_u32(f, <some constant>) [Pike]
+
+Each of the above is a "bad" hash function that inputs and outputs
+the same number of bits. One can simply compose two or more of those
+bad hash functions to construct a higher-quality hash function.
+
+One common quality goal for integer hashing (and string hashing) is
+that flipping the 19th bit, or any other small change, applied to
+multiple input keys, causes a seemingly unpredictable difference each
+time. Similarly, any change to an input should lead to a seemingly
+unpredictable selection of the output bits to flip.
+
+Therefore, if we want a high-quality hash function that inputs c bits
+and outputs fewer than c bits, we can simply truncate the output of a
+high-quality hash function that inputs and outputs c bits.
+
+To give a concrete example, here is Bob Jenkins' mix(), published in
+1996 [Jenkins]. Its input is 96 bits in three 32-bit variables, and its output
+is 96 bits. However, one may use a subset of the output bits, as every
+output bit is affected by every non-empty subset of the input bits.
+
+ Input: a, b, and c
+ Algorithm:
+ a -= b; a -= c; a ^= (c>>13);
+ b -= c; b -= a; b ^= (a<<8);
+ c -= a; c -= b; c ^= (b>>13);
+ a -= b; a -= c; a ^= (c>>12);
+ b -= c; b -= a; b ^= (a<<16);
+ c -= a; c -= b; c ^= (b>>5);
+ a -= b; a -= c; a ^= (c>>3);
+ b -= c; b -= a; b ^= (a<<10);
+ c -= a; c -= b; c ^= (b>>15);
+ Output: a, b, and c
+
+2.2 VARIATIONS ON STRING HASHING
+
+There are three variations on our initial sketch worth noting.
+
+First, for speed, one can special-case short inputs, as the CityHash
+and FarmHash algorithms do. The number of special cases can be
+reduced by using loads that may overlap: for example, a hash of a 9-
+to 16-byte string can be implemented by a hash that inputs two 8-byte
+values (the first 8 and last 8 bytes of the input string) and the string
+length [CityHash, FarmHash].
+
+Second, one may choose different means of incorporating input bits
+into the internal state. One example: the mixing of S and input bits
+may be interleaved with the mixing of parts of S and other parts of S.
+Another example: the input bits processed in a loop iteration might be
+xor'ed into multiple places in S, rather than just one, or might be
+hashed with each other before touching S [Murmur]. The advantages and
+disadvantages of these are unclear.
+
+Third, one may repeatedly "squeeze information" from S, by remixing it with
+itself and then revealing a subset of S. This is convenient when one would
+like a family of hash functions with different output lengths. A special
+case of the idea, called the "sponge construction," has been well studied and
+adopted by the authors of Keccak and others [SHA-3].
+
+3 HASH FUNCTIONS FOR HASH TABLES
+
+It isn't hard to find real-life examples where hash tables or the hash
+functions for them take more than 5% of a program's CPU time.
+Improvements to hash tables and their hash functions are therefore a
+classic example of software performance tuning. Unfortunately, the
+best choice may be platform-dependent, so to avoid writing your own
+collection of #ifdefs, please consider selecting something like the
+FarmHash family of hash functions, that supply decent
+platform-dependent logic for you.
+
+To tune a program, often one will replace an existing hash function with a
+faster, lower-quality hash function, despite the increased chance of unlucky
+or pathological performance problems. Clever algorithms can mitigate this
+risk. For example, hash tables can start with one hash function and then
+switch to another if things seem to be going poorly. Therefore, one should
+rarely plan to spend much CPU time on a secure hash function (such as SHA-3)
+or a near-universal hash function (such as VHASH) when seeking the best
+possible performance from a hash table. Against that, those types of hash
+functions can limit the risk of pathological performance problems when one is
+designing around typical hash-based algorithms that stick with a single hash
+function no matter how it behaves on the data at hand.
+
+4
+
+REFERENCES
+
+[Murmur] Appleby, Austin. https://code.google.com/p/smhasher,
+ https://sites.google.com/site/murmurhash/
+[SMHasher] Appleby, Austin. https://code.google.com/p/smhasher
+[SHA-3] Bertoni, Guido, et al. http://keccak.noekeon.org/
+[Jenkins] Jenkins, Bob. http://burtleburtle.net/bob/hash/doobs.html
+[VHASH] Krovetz, Ted. Message authentication on 64-bit architectures. In
+ Selected Areas of Cryptography – SAC 2006. Springer-Verlag, 2006.
+[CityHash] Pike, Geoff and Alakuijala, Jyrki. https://code.google.com/p/cityhash
+[FarmHash] Pike, Geoff. https://code.google.com/p/farmhash
+[Pike] Pike, Geoff. http://www.stanford.edu/class/ee380/Abstracts/121017-slides.pdf
diff --git a/src/farm-test.cc b/src/farm-test.cc
new file mode 100644
index 0000000..b4fdcc2
--- /dev/null
+++ b/src/farm-test.cc
@@ -0,0 +1,36 @@
+// Copyright (c) 2014 Google, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+// FarmHash, by Geoff Pike
+
+//
+// FarmHash, by Geoff Pike
+
+// Compiling farmhash.cc with FARMHASHSELFTEST to 1 causes self-test
+// code to run at program startup.
+#define FARMHASHSELFTEST 1
+
+// Turn off DebugTweak() and similar.
+#define FARMHASH_DEBUG 0
+
+// Make it easy to detect unavailable functions by forcing them to return 0.
+#define FARMHASH_DIE_IF_MISCONFIGURED do { return 0; } while (0)
+
+#include "farmhash.cc"
diff --git a/src/farmhash.cc b/src/farmhash.cc
new file mode 100644
index 0000000..d35b193
--- /dev/null
+++ b/src/farmhash.cc
@@ -0,0 +1,11841 @@
+// Copyright (c) 2014 Google, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+// FarmHash, by Geoff Pike
+
+#include "farmhash.h"
+// FARMHASH ASSUMPTIONS: Modify as needed, or use -DFARMHASH_ASSUME_SSE42 etc.
+// Note that if you use -DFARMHASH_ASSUME_SSE42 you likely need -msse42
+// (or its equivalent for your compiler); if you use -DFARMHASH_ASSUME_AESNI
+// you likely need -maes (or its equivalent for your compiler).
+
+#ifdef FARMHASH_ASSUME_SSSE3
+#undef FARMHASH_ASSUME_SSSE3
+#define FARMHASH_ASSUME_SSSE3 1
+#endif
+
+#ifdef FARMHASH_ASSUME_SSE41
+#undef FARMHASH_ASSUME_SSE41
+#define FARMHASH_ASSUME_SSE41 1
+#endif
+
+#ifdef FARMHASH_ASSUME_SSE42
+#undef FARMHASH_ASSUME_SSE42
+#define FARMHASH_ASSUME_SSE42 1
+#endif
+
+#ifdef FARMHASH_ASSUME_AESNI
+#undef FARMHASH_ASSUME_AESNI
+#define FARMHASH_ASSUME_AESNI 1
+#endif
+
+#ifdef FARMHASH_ASSUME_AVX
+#undef FARMHASH_ASSUME_AVX
+#define FARMHASH_ASSUME_AVX 1
+#endif
+
+#if !defined(FARMHASH_CAN_USE_CXX11) && defined(LANG_CXX11)
+#define FARMHASH_CAN_USE_CXX11 1
+#else
+#undef FARMHASH_CAN_USE_CXX11
+#define FARMHASH_CAN_USE_CXX11 0
+#endif
+
+// FARMHASH PORTABILITY LAYER: Runtime error if misconfigured
+
+#ifndef FARMHASH_DIE_IF_MISCONFIGURED
+#define FARMHASH_DIE_IF_MISCONFIGURED do { *(char*)(len % 17) = 0; } while (0)
+#endif
+
+// FARMHASH PORTABILITY LAYER: "static inline" or similar
+
+#ifndef STATIC_INLINE
+#define STATIC_INLINE static inline
+#endif
+
+// FARMHASH PORTABILITY LAYER: LIKELY and UNLIKELY
+
+#if !defined(LIKELY)
+#if defined(FARMHASH_NO_BUILTIN_EXPECT) || (defined(FARMHASH_OPTIONAL_BUILTIN_EXPECT) && !defined(HAVE_BUILTIN_EXPECT))
+#define LIKELY(x) (x)
+#else
+#define LIKELY(x) (__builtin_expect(!!(x), 1))
+#endif
+#endif
+
+#undef UNLIKELY
+#define UNLIKELY(x) !LIKELY(!(x))
+
+// FARMHASH PORTABILITY LAYER: endianness and byteswapping functions
+
+#ifdef WORDS_BIGENDIAN
+#undef FARMHASH_BIG_ENDIAN
+#define FARMHASH_BIG_ENDIAN 1
+#endif
+
+#if defined(FARMHASH_LITTLE_ENDIAN) && defined(FARMHASH_BIG_ENDIAN)
+#error
+#endif
+
+#if !defined(FARMHASH_LITTLE_ENDIAN) && !defined(FARMHASH_BIG_ENDIAN)
+#define FARMHASH_UNKNOWN_ENDIAN 1
+#endif
+
+#if !defined(bswap_32) || !defined(bswap_64)
+#undef bswap_32
+#undef bswap_64
+
+#if defined(HAVE_BUILTIN_BSWAP) || defined(__clang__) || \
+ (defined(__GNUC__) && ((__GNUC__ == 4 && __GNUC_MINOR__ >= 8) || \
+ __GNUC__ >= 5))
+// Easy case for bswap: no header file needed.
+#define bswap_32(x) __builtin_bswap32(x)
+#define bswap_64(x) __builtin_bswap64(x)
+#endif
+
+#endif
+
+#if defined(FARMHASH_UNKNOWN_ENDIAN) || !defined(bswap_64)
+
+#ifdef _WIN32
+
+#undef bswap_32
+#undef bswap_64
+#define bswap_32(x) _byteswap_ulong(x)
+#define bswap_64(x) _byteswap_uint64(x)
+
+#elif defined(__APPLE__)
+
+// Mac OS X / Darwin features
+#include <libkern/OSByteOrder.h>
+#undef bswap_32
+#undef bswap_64
+#define bswap_32(x) OSSwapInt32(x)
+#define bswap_64(x) OSSwapInt64(x)
+
+#elif defined(__sun) || defined(sun)
+
+#include <sys/byteorder.h>
+#undef bswap_32
+#undef bswap_64
+#define bswap_32(x) BSWAP_32(x)
+#define bswap_64(x) BSWAP_64(x)
+
+#elif defined(__FreeBSD__) || defined(__DragonFly__)
+
+#include <sys/endian.h>
+#undef bswap_32
+#undef bswap_64
+#define bswap_32(x) bswap32(x)
+#define bswap_64(x) bswap64(x)
+
+#elif defined(__OpenBSD__)
+
+#include <sys/types.h>
+#undef bswap_32
+#undef bswap_64
+#define bswap_32(x) swap32(x)
+#define bswap_64(x) swap64(x)
+
+#elif defined(__NetBSD__)
+
+#include <sys/types.h>
+#include <machine/bswap.h>
+#if defined(__BSWAP_RENAME) && !defined(__bswap_32)
+#undef bswap_32
+#undef bswap_64
+#define bswap_32(x) bswap32(x)
+#define bswap_64(x) bswap64(x)
+#endif
+
+#elif defined(__HAIKU__)
+
+#define _BSD_SOURCE
+#include <bsd/endian.h>
+#undef bswap_32
+#undef bswap_64
+#define bswap_32(x) bswap32(x)
+#define bswap_64(x) bswap64(x)
+
+#else
+
+#undef bswap_32
+#undef bswap_64
+#undef _BYTESWAP_H
+#include <byteswap.h>
+
+#endif
+
+#ifdef WORDS_BIGENDIAN
+#define FARMHASH_BIG_ENDIAN 1
+#endif
+
+#endif
+
+#ifdef FARMHASH_BIG_ENDIAN
+#define uint32_in_expected_order(x) (bswap_32(x))
+#define uint64_in_expected_order(x) (bswap_64(x))
+#else
+#define uint32_in_expected_order(x) (x)
+#define uint64_in_expected_order(x) (x)
+#endif
+
+namespace NAMESPACE_FOR_HASH_FUNCTIONS {
+
+STATIC_INLINE uint64_t Fetch64(const char *p) {
+ uint64_t result;
+ memcpy(&result, p, sizeof(result));
+ return uint64_in_expected_order(result);
+}
+
+STATIC_INLINE uint32_t Fetch32(const char *p) {
+ uint32_t result;
+ memcpy(&result, p, sizeof(result));
+ return uint32_in_expected_order(result);
+}
+
+STATIC_INLINE uint32_t Bswap32(uint32_t val) { return bswap_32(val); }
+STATIC_INLINE uint64_t Bswap64(uint64_t val) { return bswap_64(val); }
+
+// FARMHASH PORTABILITY LAYER: bitwise rot
+
+STATIC_INLINE uint32_t BasicRotate32(uint32_t val, int shift) {
+ // Avoid shifting by 32: doing so yields an undefined result.
+ return shift == 0 ? val : ((val >> shift) | (val << (32 - shift)));
+}
+
+STATIC_INLINE uint64_t BasicRotate64(uint64_t val, int shift) {
+ // Avoid shifting by 64: doing so yields an undefined result.
+ return shift == 0 ? val : ((val >> shift) | (val << (64 - shift)));
+}
+
+#if defined(_WIN32) && defined(FARMHASH_ROTR)
+
+STATIC_INLINE uint32_t Rotate32(uint32_t val, int shift) {
+ return sizeof(unsigned long) == sizeof(val) ?
+ _lrotr(val, shift) :
+ BasicRotate32(val, shift);
+}
+
+STATIC_INLINE uint64_t Rotate64(uint64_t val, int shift) {
+ return sizeof(unsigned long) == sizeof(val) ?
+ _lrotr(val, shift) :
+ BasicRotate64(val, shift);
+}
+
+#else
+
+STATIC_INLINE uint32_t Rotate32(uint32_t val, int shift) {
+ return BasicRotate32(val, shift);
+}
+STATIC_INLINE uint64_t Rotate64(uint64_t val, int shift) {
+ return BasicRotate64(val, shift);
+}
+
+#endif
+
+} // namespace NAMESPACE_FOR_HASH_FUNCTIONS
+
+// FARMHASH PORTABILITY LAYER: debug mode or max speed?
+// One may use -DFARMHASH_DEBUG=1 or -DFARMHASH_DEBUG=0 to force the issue.
+
+#if !defined(FARMHASH_DEBUG) && (!defined(NDEBUG) || defined(_DEBUG))
+#define FARMHASH_DEBUG 1
+#endif
+
+#undef debug_mode
+#if FARMHASH_DEBUG
+#define debug_mode 1
+#else
+#define debug_mode 0
+#endif
+
+// PLATFORM-SPECIFIC FUNCTIONS AND MACROS
+
+#undef x86_64
+#if defined (__x86_64) || defined (__x86_64__)
+#define x86_64 1
+#else
+#define x86_64 0
+#endif
+
+#undef x86
+#if defined(__i386__) || defined(__i386) || defined(__X86__)
+#define x86 1
+#else
+#define x86 x86_64
+#endif
+
+#if !defined(is_64bit)
+#define is_64bit (x86_64 || (sizeof(void*) == 8))
+#endif
+
+#undef can_use_ssse3
+#if defined(__SSSE3__) || defined(FARMHASH_ASSUME_SSSE3)
+
+#include <immintrin.h>
+#define can_use_ssse3 1
+// Now we can use _mm_hsub_epi16 and so on.
+
+#else
+#define can_use_ssse3 0
+#endif
+
+#undef can_use_sse41
+#if defined(__SSE4_1__) || defined(FARMHASH_ASSUME_SSE41)
+
+#include <immintrin.h>
+#define can_use_sse41 1
+// Now we can use _mm_insert_epi64 and so on.
+
+#else
+#define can_use_sse41 0
+#endif
+
+#undef can_use_sse42
+#if defined(__SSE4_2__) || defined(FARMHASH_ASSUME_SSE42)
+
+#include <nmmintrin.h>
+#define can_use_sse42 1
+// Now we can use _mm_crc32_u{32,16,8}. And on 64-bit platforms, _mm_crc32_u64.
+
+#else
+#define can_use_sse42 0
+#endif
+
+#undef can_use_aesni
+#if defined(__AES__) || defined(FARMHASH_ASSUME_AESNI)
+
+#include <wmmintrin.h>
+#define can_use_aesni 1
+// Now we can use _mm_aesimc_si128 and so on.
+
+#else
+#define can_use_aesni 0
+#endif
+
+#undef can_use_avx
+#if defined(__AVX__) || defined(FARMHASH_ASSUME_AVX)
+
+#include <immintrin.h>
+#define can_use_avx 1
+
+#else
+#define can_use_avx 0
+#endif
+
+#if can_use_ssse3 || can_use_sse41 || can_use_sse42 || can_use_aesni || can_use_avx
+STATIC_INLINE __m128i Fetch128(const char* s) {
+ return _mm_loadu_si128(reinterpret_cast<const __m128i*>(s));
+}
+#endif
+// Building blocks for hash functions
+
+// std::swap() was in <algorithm> but is in <utility> from C++11 on.
+#if !FARMHASH_CAN_USE_CXX11
+#include <algorithm>
+#endif
+
+#undef PERMUTE3
+#define PERMUTE3(a, b, c) do { std::swap(a, b); std::swap(a, c); } while (0)
+
+namespace NAMESPACE_FOR_HASH_FUNCTIONS {
+
+// Some primes between 2^63 and 2^64 for various uses.
+static const uint64_t k0 = 0xc3a5c85c97cb3127ULL;
+static const uint64_t k1 = 0xb492b66fbe98f273ULL;
+static const uint64_t k2 = 0x9ae16a3b2f90404fULL;
+
+// Magic numbers for 32-bit hashing. Copied from Murmur3.
+static const uint32_t c1 = 0xcc9e2d51;
+static const uint32_t c2 = 0x1b873593;
+
+// A 32-bit to 32-bit integer hash copied from Murmur3.
+STATIC_INLINE uint32_t fmix(uint32_t h)
+{
+ h ^= h >> 16;
+ h *= 0x85ebca6b;
+ h ^= h >> 13;
+ h *= 0xc2b2ae35;
+ h ^= h >> 16;
+ return h;
+}
+
+STATIC_INLINE uint32_t Mur(uint32_t a, uint32_t h) {
+ // Helper from Murmur3 for combining two 32-bit values.
+ a *= c1;
+ a = Rotate32(a, 17);
+ a *= c2;
+ h ^= a;
+ h = Rotate32(h, 19);
+ return h * 5 + 0xe6546b64;
+}
+
+template <typename T> STATIC_INLINE T DebugTweak(T x) {
+ if (debug_mode) {
+ if (sizeof(x) == 4) {
+ x = ~Bswap32(x * c1);
+ } else {
+ x = ~Bswap64(x * k1);
+ }
+ }
+ return x;
+}
+
+template <> uint128_t DebugTweak(uint128_t x) {
+ if (debug_mode) {
+ uint64_t y = DebugTweak(Uint128Low64(x));
+ uint64_t z = DebugTweak(Uint128High64(x));
+ y += z;
+ z += y;
+ x = Uint128(y, z * k1);
+ }
+ return x;
+}
+
+} // namespace NAMESPACE_FOR_HASH_FUNCTIONS
+
+using namespace std;
+using namespace NAMESPACE_FOR_HASH_FUNCTIONS;
+namespace farmhashna {
+#undef Fetch
+#define Fetch Fetch64
+
+#undef Rotate
+#define Rotate Rotate64
+
+#undef Bswap
+#define Bswap Bswap64
+
+STATIC_INLINE uint64_t ShiftMix(uint64_t val) {
+ return val ^ (val >> 47);
+}
+
+STATIC_INLINE uint64_t HashLen16(uint64_t u, uint64_t v) {
+ return Hash128to64(Uint128(u, v));
+}
+
+STATIC_INLINE uint64_t HashLen16(uint64_t u, uint64_t v, uint64_t mul) {
+ // Murmur-inspired hashing.
+ uint64_t a = (u ^ v) * mul;
+ a ^= (a >> 47);
+ uint64_t b = (v ^ a) * mul;
+ b ^= (b >> 47);
+ b *= mul;
+ return b;
+}
+
+STATIC_INLINE uint64_t HashLen0to16(const char *s, size_t len) {
+ if (len >= 8) {
+ uint64_t mul = k2 + len * 2;
+ uint64_t a = Fetch(s) + k2;
+ uint64_t b = Fetch(s + len - 8);
+ uint64_t c = Rotate(b, 37) * mul + a;
+ uint64_t d = (Rotate(a, 25) + b) * mul;
+ return HashLen16(c, d, mul);
+ }
+ if (len >= 4) {
+ uint64_t mul = k2 + len * 2;
+ uint64_t a = Fetch32(s);
+ return HashLen16(len + (a << 3), Fetch32(s + len - 4), mul);
+ }
+ if (len > 0) {
+ uint8_t a = s[0];
+ uint8_t b = s[len >> 1];
+ uint8_t c = s[len - 1];
+ uint32_t y = static_cast<uint32_t>(a) + (static_cast<uint32_t>(b) << 8);
+ uint32_t z = len + (static_cast<uint32_t>(c) << 2);
+ return ShiftMix(y * k2 ^ z * k0) * k2;
+ }
+ return k2;
+}
+
+// This probably works well for 16-byte strings as well, but it may be overkill
+// in that case.
+STATIC_INLINE uint64_t HashLen17to32(const char *s, size_t len) {
+ uint64_t mul = k2 + len * 2;
+ uint64_t a = Fetch(s) * k1;
+ uint64_t b = Fetch(s + 8);
+ uint64_t c = Fetch(s + len - 8) * mul;
+ uint64_t d = Fetch(s + len - 16) * k2;
+ return HashLen16(Rotate(a + b, 43) + Rotate(c, 30) + d,
+ a + Rotate(b + k2, 18) + c, mul);
+}
+
+// Return a 16-byte hash for 48 bytes. Quick and dirty.
+// Callers do best to use "random-looking" values for a and b.
+STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
+ uint64_t w, uint64_t x, uint64_t y, uint64_t z, uint64_t a, uint64_t b) {
+ a += w;
+ b = Rotate(b + a + z, 21);
+ uint64_t c = a;
+ a += x;
+ a += y;
+ b += Rotate(a, 44);
+ return make_pair(a + z, b + c);
+}
+
+// Return a 16-byte hash for s[0] ... s[31], a, and b. Quick and dirty.
+STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
+ const char* s, uint64_t a, uint64_t b) {
+ return WeakHashLen32WithSeeds(Fetch(s),
+ Fetch(s + 8),
+ Fetch(s + 16),
+ Fetch(s + 24),
+ a,
+ b);
+}
+
+// Return an 8-byte hash for 33 to 64 bytes.
+STATIC_INLINE uint64_t HashLen33to64(const char *s, size_t len) {
+ uint64_t mul = k2 + len * 2;
+ uint64_t a = Fetch(s) * k2;
+ uint64_t b = Fetch(s + 8);
+ uint64_t c = Fetch(s + len - 8) * mul;
+ uint64_t d = Fetch(s + len - 16) * k2;
+ uint64_t y = Rotate(a + b, 43) + Rotate(c, 30) + d;
+ uint64_t z = HashLen16(y, a + Rotate(b + k2, 18) + c, mul);
+ uint64_t e = Fetch(s + 16) * mul;
+ uint64_t f = Fetch(s + 24);
+ uint64_t g = (y + Fetch(s + len - 32)) * mul;
+ uint64_t h = (z + Fetch(s + len - 24)) * mul;
+ return HashLen16(Rotate(e + f, 43) + Rotate(g, 30) + h,
+ e + Rotate(f + a, 18) + g, mul);
+}
+
+uint64_t Hash64(const char *s, size_t len) {
+ const uint64_t seed = 81;
+ if (len <= 32) {
+ if (len <= 16) {
+ return HashLen0to16(s, len);
+ } else {
+ return HashLen17to32(s, len);
+ }
+ } else if (len <= 64) {
+ return HashLen33to64(s, len);
+ }
+
+ // For strings over 64 bytes we loop. Internal state consists of
+ // 56 bytes: v, w, x, y, and z.
+ uint64_t x = seed;
+ uint64_t y = seed * k1 + 113;
+ uint64_t z = ShiftMix(y * k2 + 113) * k2;
+ pair<uint64_t, uint64_t> v = make_pair(0, 0);
+ pair<uint64_t, uint64_t> w = make_pair(0, 0);
+ x = x * k2 + Fetch(s);
+
+ // Set end so that after the loop we have 1 to 64 bytes left to process.
+ const char* end = s + ((len - 1) / 64) * 64;
+ const char* last64 = end + ((len - 1) & 63) - 63;
+ assert(s + len - 64 == last64);
+ do {
+ x = Rotate(x + y + v.first + Fetch(s + 8), 37) * k1;
+ y = Rotate(y + v.second + Fetch(s + 48), 42) * k1;
+ x ^= w.second;
+ y += v.first + Fetch(s + 40);
+ z = Rotate(z + w.first, 33) * k1;
+ v = WeakHashLen32WithSeeds(s, v.second * k1, x + w.first);
+ w = WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch(s + 16));
+ std::swap(z, x);
+ s += 64;
+ } while (s != end);
+ uint64_t mul = k1 + ((z & 0xff) << 1);
+ // Make s point to the last 64 bytes of input.
+ s = last64;
+ w.first += ((len - 1) & 63);
+ v.first += w.first;
+ w.first += v.first;
+ x = Rotate(x + y + v.first + Fetch(s + 8), 37) * mul;
+ y = Rotate(y + v.second + Fetch(s + 48), 42) * mul;
+ x ^= w.second * 9;
+ y += v.first * 9 + Fetch(s + 40);
+ z = Rotate(z + w.first, 33) * mul;
+ v = WeakHashLen32WithSeeds(s, v.second * mul, x + w.first);
+ w = WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch(s + 16));
+ std::swap(z, x);
+ return HashLen16(HashLen16(v.first, w.first, mul) + ShiftMix(y) * k0 + z,
+ HashLen16(v.second, w.second, mul) + x,
+ mul);
+}
+
+uint64_t Hash64WithSeeds(const char *s, size_t len, uint64_t seed0, uint64_t seed1);
+
+uint64_t Hash64WithSeed(const char *s, size_t len, uint64_t seed) {
+ return Hash64WithSeeds(s, len, k2, seed);
+}
+
+uint64_t Hash64WithSeeds(const char *s, size_t len, uint64_t seed0, uint64_t seed1) {
+ return HashLen16(Hash64(s, len) - seed0, seed1);
+}
+} // namespace farmhashna
+namespace farmhashuo {
+#undef Fetch
+#define Fetch Fetch64
+
+#undef Rotate
+#define Rotate Rotate64
+
+STATIC_INLINE uint64_t H(uint64_t x, uint64_t y, uint64_t mul, int r) {
+ uint64_t a = (x ^ y) * mul;
+ a ^= (a >> 47);
+ uint64_t b = (y ^ a) * mul;
+ return Rotate(b, r) * mul;
+}
+
+uint64_t Hash64WithSeeds(const char *s, size_t len,
+ uint64_t seed0, uint64_t seed1) {
+ if (len <= 64) {
+ return farmhashna::Hash64WithSeeds(s, len, seed0, seed1);
+ }
+
+ // For strings over 64 bytes we loop. Internal state consists of
+ // 64 bytes: u, v, w, x, y, and z.
+ uint64_t x = seed0;
+ uint64_t y = seed1 * k2 + 113;
+ uint64_t z = farmhashna::ShiftMix(y * k2) * k2;
+ pair<uint64_t, uint64_t> v = make_pair(seed0, seed1);
+ pair<uint64_t, uint64_t> w = make_pair(0, 0);
+ uint64_t u = x - z;
+ x *= k2;
+ uint64_t mul = k2 + (u & 0x82);
+
+ // Set end so that after the loop we have 1 to 64 bytes left to process.
+ const char* end = s + ((len - 1) / 64) * 64;
+ const char* last64 = end + ((len - 1) & 63) - 63;
+ assert(s + len - 64 == last64);
+ do {
+ uint64_t a0 = Fetch(s);
+ uint64_t a1 = Fetch(s + 8);
+ uint64_t a2 = Fetch(s + 16);
+ uint64_t a3 = Fetch(s + 24);
+ uint64_t a4 = Fetch(s + 32);
+ uint64_t a5 = Fetch(s + 40);
+ uint64_t a6 = Fetch(s + 48);
+ uint64_t a7 = Fetch(s + 56);
+ x += a0 + a1;
+ y += a2;
+ z += a3;
+ v.first += a4;
+ v.second += a5 + a1;
+ w.first += a6;
+ w.second += a7;
+
+ x = Rotate(x, 26);
+ x *= 9;
+ y = Rotate(y, 29);
+ z *= mul;
+ v.first = Rotate(v.first, 33);
+ v.second = Rotate(v.second, 30);
+ w.first ^= x;
+ w.first *= 9;
+ z = Rotate(z, 32);
+ z += w.second;
+ w.second += z;
+ z *= 9;
+ std::swap(u, y);
+
+ z += a0 + a6;
+ v.first += a2;
+ v.second += a3;
+ w.first += a4;
+ w.second += a5 + a6;
+ x += a1;
+ y += a7;
+
+ y += v.first;
+ v.first += x - y;
+ v.second += w.first;
+ w.first += v.second;
+ w.second += x - y;
+ x += w.second;
+ w.second = Rotate(w.second, 34);
+ std::swap(u, z);
+ s += 64;
+ } while (s != end);
+ // Make s point to the last 64 bytes of input.
+ s = last64;
+ u *= 9;
+ v.second = Rotate(v.second, 28);
+ v.first = Rotate(v.first, 20);
+ w.first += ((len - 1) & 63);
+ u += y;
+ y += u;
+ x = Rotate(y - x + v.first + Fetch(s + 8), 37) * mul;
+ y = Rotate(y ^ v.second ^ Fetch(s + 48), 42) * mul;
+ x ^= w.second * 9;
+ y += v.first + Fetch(s + 40);
+ z = Rotate(z + w.first, 33) * mul;
+ v = farmhashna::WeakHashLen32WithSeeds(s, v.second * mul, x + w.first);
+ w = farmhashna::WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch(s + 16));
+ return H(farmhashna::HashLen16(v.first + x, w.first ^ y, mul) + z - u,
+ H(v.second + y, w.second + z, k2, 30) ^ x,
+ k2,
+ 31);
+}
+
+uint64_t Hash64WithSeed(const char *s, size_t len, uint64_t seed) {
+ return len <= 64 ? farmhashna::Hash64WithSeed(s, len, seed) :
+ Hash64WithSeeds(s, len, 0, seed);
+}
+
+uint64_t Hash64(const char *s, size_t len) {
+ return len <= 64 ? farmhashna::Hash64(s, len) :
+ Hash64WithSeeds(s, len, 81, 0);
+}
+} // namespace farmhashuo
+namespace farmhashxo {
+#undef Fetch
+#define Fetch Fetch64
+
+#undef Rotate
+#define Rotate Rotate64
+
+STATIC_INLINE uint64_t H32(const char *s, size_t len, uint64_t mul,
+ uint64_t seed0 = 0, uint64_t seed1 = 0) {
+ uint64_t a = Fetch(s) * k1;
+ uint64_t b = Fetch(s + 8);
+ uint64_t c = Fetch(s + len - 8) * mul;
+ uint64_t d = Fetch(s + len - 16) * k2;
+ uint64_t u = Rotate(a + b, 43) + Rotate(c, 30) + d + seed0;
+ uint64_t v = a + Rotate(b + k2, 18) + c + seed1;
+ a = farmhashna::ShiftMix((u ^ v) * mul);
+ b = farmhashna::ShiftMix((v ^ a) * mul);
+ return b;
+}
+
+// Return an 8-byte hash for 33 to 64 bytes.
+STATIC_INLINE uint64_t HashLen33to64(const char *s, size_t len) {
+ uint64_t mul0 = k2 - 30;
+ uint64_t mul1 = k2 - 30 + 2 * len;
+ uint64_t h0 = H32(s, 32, mul0);
+ uint64_t h1 = H32(s + len - 32, 32, mul1);
+ return ((h1 * mul1) + h0) * mul1;
+}
+
+// Return an 8-byte hash for 65 to 96 bytes.
+STATIC_INLINE uint64_t HashLen65to96(const char *s, size_t len) {
+ uint64_t mul0 = k2 - 114;
+ uint64_t mul1 = k2 - 114 + 2 * len;
+ uint64_t h0 = H32(s, 32, mul0);
+ uint64_t h1 = H32(s + 32, 32, mul1);
+ uint64_t h2 = H32(s + len - 32, 32, mul1, h0, h1);
+ return (h2 * 9 + (h0 >> 17) + (h1 >> 21)) * mul1;
+}
+
+uint64_t Hash64(const char *s, size_t len) {
+ if (len <= 32) {
+ if (len <= 16) {
+ return farmhashna::HashLen0to16(s, len);
+ } else {
+ return farmhashna::HashLen17to32(s, len);
+ }
+ } else if (len <= 64) {
+ return HashLen33to64(s, len);
+ } else if (len <= 96) {
+ return HashLen65to96(s, len);
+ } else if (len <= 256) {
+ return farmhashna::Hash64(s, len);
+ } else {
+ return farmhashuo::Hash64(s, len);
+ }
+}
+
+uint64_t Hash64WithSeeds(const char *s, size_t len, uint64_t seed0, uint64_t seed1) {
+ return farmhashuo::Hash64WithSeeds(s, len, seed0, seed1);
+}
+
+uint64_t Hash64WithSeed(const char *s, size_t len, uint64_t seed) {
+ return farmhashuo::Hash64WithSeed(s, len, seed);
+}
+} // namespace farmhashxo
+namespace farmhashte {
+#if !can_use_sse41 || !x86_64
+
+uint64_t Hash64(const char *s, size_t len) {
+ FARMHASH_DIE_IF_MISCONFIGURED;
+ return s == NULL ? 0 : len;
+}
+
+uint64_t Hash64WithSeed(const char *s, size_t len, uint64_t seed) {
+ FARMHASH_DIE_IF_MISCONFIGURED;
+ return seed + Hash64(s, len);
+}
+
+uint64_t Hash64WithSeeds(const char *s, size_t len,
+ uint64_t seed0, uint64_t seed1) {
+ FARMHASH_DIE_IF_MISCONFIGURED;
+ return seed0 + seed1 + Hash64(s, len);
+}
+
+#else
+
+#undef Fetch
+#define Fetch Fetch64
+
+#undef Rotate
+#define Rotate Rotate64
+
+#undef Bswap
+#define Bswap Bswap64
+
+// Helpers for data-parallel operations (1x 128 bits or 2x 64 or 4x 32).
+STATIC_INLINE __m128i Add(__m128i x, __m128i y) { return _mm_add_epi64(x, y); }
+STATIC_INLINE __m128i Xor(__m128i x, __m128i y) { return _mm_xor_si128(x, y); }
+STATIC_INLINE __m128i Mul(__m128i x, __m128i y) { return _mm_mullo_epi32(x, y); }
+STATIC_INLINE __m128i Shuf(__m128i x, __m128i y) { return _mm_shuffle_epi8(y, x); }
+
+// Requires n >= 256. Requires SSE4.1. Should be slightly faster if the
+// compiler uses AVX instructions (e.g., use the -mavx flag with GCC).
+STATIC_INLINE uint64_t Hash64Long(const char* s, size_t n,
+ uint64_t seed0, uint64_t seed1) {
+ const __m128i kShuf =
+ _mm_set_epi8(4, 11, 10, 5, 8, 15, 6, 9, 12, 2, 14, 13, 0, 7, 3, 1);
+ const __m128i kMult =
+ _mm_set_epi8(0xbd, 0xd6, 0x33, 0x39, 0x45, 0x54, 0xfa, 0x03,
+ 0x34, 0x3e, 0x33, 0xed, 0xcc, 0x9e, 0x2d, 0x51);
+ uint64_t seed2 = (seed0 + 113) * (seed1 + 9);
+ uint64_t seed3 = (Rotate(seed0, 23) + 27) * (Rotate(seed1, 30) + 111);
+ __m128i d0 = _mm_cvtsi64_si128(seed0);
+ __m128i d1 = _mm_cvtsi64_si128(seed1);
+ __m128i d2 = Shuf(kShuf, d0);
+ __m128i d3 = Shuf(kShuf, d1);
+ __m128i d4 = Xor(d0, d1);
+ __m128i d5 = Xor(d1, d2);
+ __m128i d6 = Xor(d2, d4);
+ __m128i d7 = _mm_set1_epi32(seed2 >> 32);
+ __m128i d8 = Mul(kMult, d2);
+ __m128i d9 = _mm_set1_epi32(seed3 >> 32);
+ __m128i d10 = _mm_set1_epi32(seed3);
+ __m128i d11 = Add(d2, _mm_set1_epi32(seed2));
+ const char* end = s + (n & ~static_cast<size_t>(255));
+ do {
+ __m128i z;
+ z = Fetch128(s);
+ d0 = Add(d0, z);
+ d1 = Shuf(kShuf, d1);
+ d2 = Xor(d2, d0);
+ d4 = Xor(d4, z);
+ d4 = Xor(d4, d1);
+ std::swap(d0, d6);
+ z = Fetch128(s + 16);
+ d5 = Add(d5, z);
+ d6 = Shuf(kShuf, d6);
+ d8 = Shuf(kShuf, d8);
+ d7 = Xor(d7, d5);
+ d0 = Xor(d0, z);
+ d0 = Xor(d0, d6);
+ std::swap(d5, d11);
+ z = Fetch128(s + 32);
+ d1 = Add(d1, z);
+ d2 = Shuf(kShuf, d2);
+ d4 = Shuf(kShuf, d4);
+ d5 = Xor(d5, z);
+ d5 = Xor(d5, d2);
+ std::swap(d10, d4);
+ z = Fetch128(s + 48);
+ d6 = Add(d6, z);
+ d7 = Shuf(kShuf, d7);
+ d0 = Shuf(kShuf, d0);
+ d8 = Xor(d8, d6);
+ d1 = Xor(d1, z);
+ d1 = Add(d1, d7);
+ z = Fetch128(s + 64);
+ d2 = Add(d2, z);
+ d5 = Shuf(kShuf, d5);
+ d4 = Add(d4, d2);
+ d6 = Xor(d6, z);
+ d6 = Xor(d6, d11);
+ std::swap(d8, d2);
+ z = Fetch128(s + 80);
+ d7 = Xor(d7, z);
+ d8 = Shuf(kShuf, d8);
+ d1 = Shuf(kShuf, d1);
+ d0 = Add(d0, d7);
+ d2 = Add(d2, z);
+ d2 = Add(d2, d8);
+ std::swap(d1, d7);
+ z = Fetch128(s + 96);
+ d4 = Shuf(kShuf, d4);
+ d6 = Shuf(kShuf, d6);
+ d8 = Mul(kMult, d8);
+ d5 = Xor(d5, d11);
+ d7 = Xor(d7, z);
+ d7 = Add(d7, d4);
+ std::swap(d6, d0);
+ z = Fetch128(s + 112);
+ d8 = Add(d8, z);
+ d0 = Shuf(kShuf, d0);
+ d2 = Shuf(kShuf, d2);
+ d1 = Xor(d1, d8);
+ d10 = Xor(d10, z);
+ d10 = Xor(d10, d0);
+ std::swap(d11, d5);
+ z = Fetch128(s + 128);
+ d4 = Add(d4, z);
+ d5 = Shuf(kShuf, d5);
+ d7 = Shuf(kShuf, d7);
+ d6 = Add(d6, d4);
+ d8 = Xor(d8, z);
+ d8 = Xor(d8, d5);
+ std::swap(d4, d10);
+ z = Fetch128(s + 144);
+ d0 = Add(d0, z);
+ d1 = Shuf(kShuf, d1);
+ d2 = Add(d2, d0);
+ d4 = Xor(d4, z);
+ d4 = Xor(d4, d1);
+ z = Fetch128(s + 160);
+ d5 = Add(d5, z);
+ d6 = Shuf(kShuf, d6);
+ d8 = Shuf(kShuf, d8);
+ d7 = Xor(d7, d5);
+ d0 = Xor(d0, z);
+ d0 = Xor(d0, d6);
+ std::swap(d2, d8);
+ z = Fetch128(s + 176);
+ d1 = Add(d1, z);
+ d2 = Shuf(kShuf, d2);
+ d4 = Shuf(kShuf, d4);
+ d5 = Mul(kMult, d5);
+ d5 = Xor(d5, z);
+ d5 = Xor(d5, d2);
+ std::swap(d7, d1);
+ z = Fetch128(s + 192);
+ d6 = Add(d6, z);
+ d7 = Shuf(kShuf, d7);
+ d0 = Shuf(kShuf, d0);
+ d8 = Add(d8, d6);
+ d1 = Xor(d1, z);
+ d1 = Xor(d1, d7);
+ std::swap(d0, d6);
+ z = Fetch128(s + 208);
+ d2 = Add(d2, z);
+ d5 = Shuf(kShuf, d5);
+ d4 = Xor(d4, d2);
+ d6 = Xor(d6, z);
+ d6 = Xor(d6, d9);
+ std::swap(d5, d11);
+ z = Fetch128(s + 224);
+ d7 = Add(d7, z);
+ d8 = Shuf(kShuf, d8);
+ d1 = Shuf(kShuf, d1);
+ d0 = Xor(d0, d7);
+ d2 = Xor(d2, z);
+ d2 = Xor(d2, d8);
+ std::swap(d10, d4);
+ z = Fetch128(s + 240);
+ d3 = Add(d3, z);
+ d4 = Shuf(kShuf, d4);
+ d6 = Shuf(kShuf, d6);
+ d7 = Mul(kMult, d7);
+ d5 = Add(d5, d3);
+ d7 = Xor(d7, z);
+ d7 = Xor(d7, d4);
+ std::swap(d3, d9);
+ s += 256;
+ } while (s != end);
+ d6 = Add(Mul(kMult, d6), _mm_cvtsi64_si128(n));
+ if (n % 256 != 0) {
+ d7 = Add(_mm_shuffle_epi32(d8, (0 << 6) + (3 << 4) + (2 << 2) + (1 << 0)), d7);
+ d8 = Add(Mul(kMult, d8), _mm_cvtsi64_si128(farmhashxo::Hash64(s, n % 256)));
+ }
+ __m128i t[8];
+ d0 = Mul(kMult, Shuf(kShuf, Mul(kMult, d0)));
+ d3 = Mul(kMult, Shuf(kShuf, Mul(kMult, d3)));
+ d9 = Mul(kMult, Shuf(kShuf, Mul(kMult, d9)));
+ d1 = Mul(kMult, Shuf(kShuf, Mul(kMult, d1)));
+ d0 = Add(d11, d0);
+ d3 = Xor(d7, d3);
+ d9 = Add(d8, d9);
+ d1 = Add(d10, d1);
+ d4 = Add(d3, d4);
+ d5 = Add(d9, d5);
+ d6 = Xor(d1, d6);
+ d2 = Add(d0, d2);
+ t[0] = d0;
+ t[1] = d3;
+ t[2] = d9;
+ t[3] = d1;
+ t[4] = d4;
+ t[5] = d5;
+ t[6] = d6;
+ t[7] = d2;
+ return farmhashxo::Hash64(reinterpret_cast<const char*>(t), sizeof(t));
+}
+
+uint64_t Hash64(const char *s, size_t len) {
+ // Empirically, farmhashxo seems faster until length 512.
+ return len >= 512 ? Hash64Long(s, len, k2, k1) : farmhashxo::Hash64(s, len);
+}
+
+uint64_t Hash64WithSeed(const char *s, size_t len, uint64_t seed) {
+ return len >= 512 ? Hash64Long(s, len, k1, seed) :
+ farmhashxo::Hash64WithSeed(s, len, seed);
+}
+
+uint64_t Hash64WithSeeds(const char *s, size_t len, uint64_t seed0, uint64_t seed1) {
+ return len >= 512 ? Hash64Long(s, len, seed0, seed1) :
+ farmhashxo::Hash64WithSeeds(s, len, seed0, seed1);
+}
+
+#endif
+} // namespace farmhashte
+namespace farmhashnt {
+#if !can_use_sse41 || !x86_64
+
+uint32_t Hash32(const char *s, size_t len) {
+ FARMHASH_DIE_IF_MISCONFIGURED;
+ return s == NULL ? 0 : len;
+}
+
+uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
+ FARMHASH_DIE_IF_MISCONFIGURED;
+ return seed + Hash32(s, len);
+}
+
+#else
+
+uint32_t Hash32(const char *s, size_t len) {
+ return static_cast<uint32_t>(farmhashte::Hash64(s, len));
+}
+
+uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
+ return static_cast<uint32_t>(farmhashte::Hash64WithSeed(s, len, seed));
+}
+
+#endif
+} // namespace farmhashnt
+namespace farmhashmk {
+#undef Fetch
+#define Fetch Fetch32
+
+#undef Rotate
+#define Rotate Rotate32
+
+#undef Bswap
+#define Bswap Bswap32
+
+STATIC_INLINE uint32_t Hash32Len13to24(const char *s, size_t len, uint32_t seed = 0) {
+ uint32_t a = Fetch(s - 4 + (len >> 1));
+ uint32_t b = Fetch(s + 4);
+ uint32_t c = Fetch(s + len - 8);
+ uint32_t d = Fetch(s + (len >> 1));
+ uint32_t e = Fetch(s);
+ uint32_t f = Fetch(s + len - 4);
+ uint32_t h = d * c1 + len + seed;
+ a = Rotate(a, 12) + f;
+ h = Mur(c, h) + a;
+ a = Rotate(a, 3) + c;
+ h = Mur(e, h) + a;
+ a = Rotate(a + f, 12) + d;
+ h = Mur(b ^ seed, h) + a;
+ return fmix(h);
+}
+
+STATIC_INLINE uint32_t Hash32Len0to4(const char *s, size_t len, uint32_t seed = 0) {
+ uint32_t b = seed;
+ uint32_t c = 9;
+ for (size_t i = 0; i < len; i++) {
+ signed char v = s[i];
+ b = b * c1 + v;
+ c ^= b;
+ }
+ return fmix(Mur(b, Mur(len, c)));
+}
+
+STATIC_INLINE uint32_t Hash32Len5to12(const char *s, size_t len, uint32_t seed = 0) {
+ uint32_t a = len, b = len * 5, c = 9, d = b + seed;
+ a += Fetch(s);
+ b += Fetch(s + len - 4);
+ c += Fetch(s + ((len >> 1) & 4));
+ return fmix(seed ^ Mur(c, Mur(b, Mur(a, d))));
+}
+
+uint32_t Hash32(const char *s, size_t len) {
+ if (len <= 24) {
+ return len <= 12 ?
+ (len <= 4 ? Hash32Len0to4(s, len) : Hash32Len5to12(s, len)) :
+ Hash32Len13to24(s, len);
+ }
+
+ // len > 24
+ uint32_t h = len, g = c1 * len, f = g;
+ uint32_t a0 = Rotate(Fetch(s + len - 4) * c1, 17) * c2;
+ uint32_t a1 = Rotate(Fetch(s + len - 8) * c1, 17) * c2;
+ uint32_t a2 = Rotate(Fetch(s + len - 16) * c1, 17) * c2;
+ uint32_t a3 = Rotate(Fetch(s + len - 12) * c1, 17) * c2;
+ uint32_t a4 = Rotate(Fetch(s + len - 20) * c1, 17) * c2;
+ h ^= a0;
+ h = Rotate(h, 19);
+ h = h * 5 + 0xe6546b64;
+ h ^= a2;
+ h = Rotate(h, 19);
+ h = h * 5 + 0xe6546b64;
+ g ^= a1;
+ g = Rotate(g, 19);
+ g = g * 5 + 0xe6546b64;
+ g ^= a3;
+ g = Rotate(g, 19);
+ g = g * 5 + 0xe6546b64;
+ f += a4;
+ f = Rotate(f, 19) + 113;
+ size_t iters = (len - 1) / 20;
+ do {
+ uint32_t a = Fetch(s);
+ uint32_t b = Fetch(s + 4);
+ uint32_t c = Fetch(s + 8);
+ uint32_t d = Fetch(s + 12);
+ uint32_t e = Fetch(s + 16);
+ h += a;
+ g += b;
+ f += c;
+ h = Mur(d, h) + e;
+ g = Mur(c, g) + a;
+ f = Mur(b + e * c1, f) + d;
+ f += g;
+ g += f;
+ s += 20;
+ } while (--iters != 0);
+ g = Rotate(g, 11) * c1;
+ g = Rotate(g, 17) * c1;
+ f = Rotate(f, 11) * c1;
+ f = Rotate(f, 17) * c1;
+ h = Rotate(h + g, 19);
+ h = h * 5 + 0xe6546b64;
+ h = Rotate(h, 17) * c1;
+ h = Rotate(h + f, 19);
+ h = h * 5 + 0xe6546b64;
+ h = Rotate(h, 17) * c1;
+ return h;
+}
+
+uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
+ if (len <= 24) {
+ if (len >= 13) return Hash32Len13to24(s, len, seed * c1);
+ else if (len >= 5) return Hash32Len5to12(s, len, seed);
+ else return Hash32Len0to4(s, len, seed);
+ }
+ uint32_t h = Hash32Len13to24(s, 24, seed ^ len);
+ return Mur(Hash32(s + 24, len - 24) + seed, h);
+}
+} // namespace farmhashmk
+namespace farmhashsu {
+#if !can_use_sse42 || !can_use_aesni
+
+uint32_t Hash32(const char *s, size_t len) {
+ FARMHASH_DIE_IF_MISCONFIGURED;
+ return s == NULL ? 0 : len;
+}
+
+uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
+ FARMHASH_DIE_IF_MISCONFIGURED;
+ return seed + Hash32(s, len);
+}
+
+#else
+
+#undef Fetch
+#define Fetch Fetch32
+
+#undef Rotate
+#define Rotate Rotate32
+
+#undef Bswap
+#define Bswap Bswap32
+
+// Helpers for data-parallel operations (4x 32-bits).
+STATIC_INLINE __m128i Add(__m128i x, __m128i y) { return _mm_add_epi32(x, y); }
+STATIC_INLINE __m128i Xor(__m128i x, __m128i y) { return _mm_xor_si128(x, y); }
+STATIC_INLINE __m128i Or(__m128i x, __m128i y) { return _mm_or_si128(x, y); }
+STATIC_INLINE __m128i Mul(__m128i x, __m128i y) { return _mm_mullo_epi32(x, y); }
+STATIC_INLINE __m128i Mul5(__m128i x) { return Add(x, _mm_slli_epi32(x, 2)); }
+STATIC_INLINE __m128i RotateLeft(__m128i x, int c) {
+ return Or(_mm_slli_epi32(x, c),
+ _mm_srli_epi32(x, 32 - c));
+}
+STATIC_INLINE __m128i Rol17(__m128i x) { return RotateLeft(x, 17); }
+STATIC_INLINE __m128i Rol19(__m128i x) { return RotateLeft(x, 19); }
+STATIC_INLINE __m128i Shuffle0321(__m128i x) {
+ return _mm_shuffle_epi32(x, (0 << 6) + (3 << 4) + (2 << 2) + (1 << 0));
+}
+
+uint32_t Hash32(const char *s, size_t len) {
+ const uint32_t seed = 81;
+ if (len <= 24) {
+ return len <= 12 ?
+ (len <= 4 ?
+ farmhashmk::Hash32Len0to4(s, len) :
+ farmhashmk::Hash32Len5to12(s, len)) :
+ farmhashmk::Hash32Len13to24(s, len);
+ }
+
+ if (len < 40) {
+ uint32_t a = len, b = seed * c2, c = a + b;
+ a += Fetch(s + len - 4);
+ b += Fetch(s + len - 20);
+ c += Fetch(s + len - 16);
+ uint32_t d = a;
+ a = NAMESPACE_FOR_HASH_FUNCTIONS::Rotate32(a, 21);
+ a = Mur(a, Mur(b, _mm_crc32_u32(c, d)));
+ a += Fetch(s + len - 12);
+ b += Fetch(s + len - 8);
+ d += a;
+ a += d;
+ b = Mur(b, d) * c2;
+ a = _mm_crc32_u32(a, b + c);
+ return farmhashmk::Hash32Len13to24(s, (len + 1) / 2, a) + b;
+ }
+
+#undef Mulc1
+#define Mulc1(x) Mul((x), cc1)
+
+#undef Mulc2
+#define Mulc2(x) Mul((x), cc2)
+
+#undef Murk
+#define Murk(a, h) \
+ Add(k, \
+ Mul5( \
+ Rol19( \
+ Xor( \
+ Mulc2( \
+ Rol17( \
+ Mulc1(a))), \
+ (h)))))
+
+ const __m128i cc1 = _mm_set1_epi32(c1);
+ const __m128i cc2 = _mm_set1_epi32(c2);
+ __m128i h = _mm_set1_epi32(seed);
+ __m128i g = _mm_set1_epi32(c1 * seed);
+ __m128i f = g;
+ __m128i k = _mm_set1_epi32(0xe6546b64);
+ __m128i q;
+ if (len < 80) {
+ __m128i a = Fetch128(s);
+ __m128i b = Fetch128(s + 16);
+ __m128i c = Fetch128(s + (len - 15) / 2);
+ __m128i d = Fetch128(s + len - 32);
+ __m128i e = Fetch128(s + len - 16);
+ h = Add(h, a);
+ g = Add(g, b);
+ q = g;
+ g = Shuffle0321(g);
+ f = Add(f, c);
+ __m128i be = Add(b, Mulc1(e));
+ h = Add(h, f);
+ f = Add(f, h);
+ h = Add(Murk(d, h), e);
+ k = Xor(k, _mm_shuffle_epi8(g, f));
+ g = Add(Xor(c, g), a);
+ f = Add(Xor(be, f), d);
+ k = Add(k, be);
+ k = Add(k, _mm_shuffle_epi8(f, h));
+ f = Add(f, g);
+ g = Add(g, f);
+ g = Add(_mm_set1_epi32(len), Mulc1(g));
+ } else {
+ // len >= 80
+ // The following is loosely modelled after farmhashmk::Hash32.
+ size_t iters = (len - 1) / 80;
+ len -= iters * 80;
+
+#undef Chunk
+#define Chunk() do { \
+ __m128i a = Fetch128(s); \
+ __m128i b = Fetch128(s + 16); \
+ __m128i c = Fetch128(s + 32); \
+ __m128i d = Fetch128(s + 48); \
+ __m128i e = Fetch128(s + 64); \
+ h = Add(h, a); \
+ g = Add(g, b); \
+ g = Shuffle0321(g); \
+ f = Add(f, c); \
+ __m128i be = Add(b, Mulc1(e)); \
+ h = Add(h, f); \
+ f = Add(f, h); \
+ h = Add(h, d); \
+ q = Add(q, e); \
+ h = Rol17(h); \
+ h = Mulc1(h); \
+ k = Xor(k, _mm_shuffle_epi8(g, f)); \
+ g = Add(Xor(c, g), a); \
+ f = Add(Xor(be, f), d); \
+ std::swap(f, q); \
+ q = _mm_aesimc_si128(q); \
+ k = Add(k, be); \
+ k = Add(k, _mm_shuffle_epi8(f, h)); \
+ f = Add(f, g); \
+ g = Add(g, f); \
+ f = Mulc1(f); \
+} while (0)
+
+ q = g;
+ while (iters-- != 0) {
+ Chunk();
+ s += 80;
+ }
+
+ if (len != 0) {
+ h = Add(h, _mm_set1_epi32(len));
+ s = s + len - 80;
+ Chunk();
+ }
+ }
+
+ g = Shuffle0321(g);
+ k = Xor(k, g);
+ k = Xor(k, q);
+ h = Xor(h, q);
+ f = Mulc1(f);
+ k = Mulc2(k);
+ g = Mulc1(g);
+ h = Mulc2(h);
+ k = Add(k, _mm_shuffle_epi8(g, f));
+ h = Add(h, f);
+ f = Add(f, h);
+ g = Add(g, k);
+ k = Add(k, g);
+ k = Xor(k, _mm_shuffle_epi8(f, h));
+ __m128i buf[4];
+ buf[0] = f;
+ buf[1] = g;
+ buf[2] = k;
+ buf[3] = h;
+ s = reinterpret_cast<char*>(buf);
+ uint32_t x = Fetch(s);
+ uint32_t y = Fetch(s+4);
+ uint32_t z = Fetch(s+8);
+ x = _mm_crc32_u32(x, Fetch(s+12));
+ y = _mm_crc32_u32(y, Fetch(s+16));
+ z = _mm_crc32_u32(z * c1, Fetch(s+20));
+ x = _mm_crc32_u32(x, Fetch(s+24));
+ y = _mm_crc32_u32(y * c1, Fetch(s+28));
+ uint32_t o = y;
+ z = _mm_crc32_u32(z, Fetch(s+32));
+ x = _mm_crc32_u32(x * c1, Fetch(s+36));
+ y = _mm_crc32_u32(y, Fetch(s+40));
+ z = _mm_crc32_u32(z * c1, Fetch(s+44));
+ x = _mm_crc32_u32(x, Fetch(s+48));
+ y = _mm_crc32_u32(y * c1, Fetch(s+52));
+ z = _mm_crc32_u32(z, Fetch(s+56));
+ x = _mm_crc32_u32(x, Fetch(s+60));
+ return (o - x + y - z) * c1;
+}
+
+#undef Chunk
+#undef Murk
+#undef Mulc2
+#undef Mulc1
+
+uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
+ if (len <= 24) {
+ if (len >= 13) return farmhashmk::Hash32Len13to24(s, len, seed * c1);
+ else if (len >= 5) return farmhashmk::Hash32Len5to12(s, len, seed);
+ else return farmhashmk::Hash32Len0to4(s, len, seed);
+ }
+ uint32_t h = farmhashmk::Hash32Len13to24(s, 24, seed ^ len);
+ return _mm_crc32_u32(Hash32(s + 24, len - 24) + seed, h);
+}
+
+#endif
+} // namespace farmhashsu
+namespace farmhashsa {
+#if !can_use_sse42
+
+uint32_t Hash32(const char *s, size_t len) {
+ FARMHASH_DIE_IF_MISCONFIGURED;
+ return s == NULL ? 0 : len;
+}
+
+uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
+ FARMHASH_DIE_IF_MISCONFIGURED;
+ return seed + Hash32(s, len);
+}
+
+#else
+
+#undef Fetch
+#define Fetch Fetch32
+
+#undef Rotate
+#define Rotate Rotate32
+
+#undef Bswap
+#define Bswap Bswap32
+
+// Helpers for data-parallel operations (4x 32-bits).
+STATIC_INLINE __m128i Add(__m128i x, __m128i y) { return _mm_add_epi32(x, y); }
+STATIC_INLINE __m128i Xor(__m128i x, __m128i y) { return _mm_xor_si128(x, y); }
+STATIC_INLINE __m128i Or(__m128i x, __m128i y) { return _mm_or_si128(x, y); }
+STATIC_INLINE __m128i Mul(__m128i x, __m128i y) { return _mm_mullo_epi32(x, y); }
+STATIC_INLINE __m128i Mul5(__m128i x) { return Add(x, _mm_slli_epi32(x, 2)); }
+STATIC_INLINE __m128i Rotate(__m128i x, int c) {
+ return Or(_mm_slli_epi32(x, c),
+ _mm_srli_epi32(x, 32 - c));
+}
+STATIC_INLINE __m128i Rot17(__m128i x) { return Rotate(x, 17); }
+STATIC_INLINE __m128i Rot19(__m128i x) { return Rotate(x, 19); }
+STATIC_INLINE __m128i Shuffle0321(__m128i x) {
+ return _mm_shuffle_epi32(x, (0 << 6) + (3 << 4) + (2 << 2) + (1 << 0));
+}
+
+uint32_t Hash32(const char *s, size_t len) {
+ const uint32_t seed = 81;
+ if (len <= 24) {
+ return len <= 12 ?
+ (len <= 4 ?
+ farmhashmk::Hash32Len0to4(s, len) :
+ farmhashmk::Hash32Len5to12(s, len)) :
+ farmhashmk::Hash32Len13to24(s, len);
+ }
+
+ if (len < 40) {
+ uint32_t a = len, b = seed * c2, c = a + b;
+ a += Fetch(s + len - 4);
+ b += Fetch(s + len - 20);
+ c += Fetch(s + len - 16);
+ uint32_t d = a;
+ a = NAMESPACE_FOR_HASH_FUNCTIONS::Rotate32(a, 21);
+ a = Mur(a, Mur(b, Mur(c, d)));
+ a += Fetch(s + len - 12);
+ b += Fetch(s + len - 8);
+ d += a;
+ a += d;
+ b = Mur(b, d) * c2;
+ a = _mm_crc32_u32(a, b + c);
+ return farmhashmk::Hash32Len13to24(s, (len + 1) / 2, a) + b;
+ }
+
+#undef Mulc1
+#define Mulc1(x) Mul((x), cc1)
+
+#undef Mulc2
+#define Mulc2(x) Mul((x), cc2)
+
+#undef Murk
+#define Murk(a, h) \
+ Add(k, \
+ Mul5( \
+ Rot19( \
+ Xor( \
+ Mulc2( \
+ Rot17( \
+ Mulc1(a))), \
+ (h)))))
+
+ const __m128i cc1 = _mm_set1_epi32(c1);
+ const __m128i cc2 = _mm_set1_epi32(c2);
+ __m128i h = _mm_set1_epi32(seed);
+ __m128i g = _mm_set1_epi32(c1 * seed);
+ __m128i f = g;
+ __m128i k = _mm_set1_epi32(0xe6546b64);
+ if (len < 80) {
+ __m128i a = Fetch128(s);
+ __m128i b = Fetch128(s + 16);
+ __m128i c = Fetch128(s + (len - 15) / 2);
+ __m128i d = Fetch128(s + len - 32);
+ __m128i e = Fetch128(s + len - 16);
+ h = Add(h, a);
+ g = Add(g, b);
+ g = Shuffle0321(g);
+ f = Add(f, c);
+ __m128i be = Add(b, Mulc1(e));
+ h = Add(h, f);
+ f = Add(f, h);
+ h = Add(Murk(d, h), e);
+ k = Xor(k, _mm_shuffle_epi8(g, f));
+ g = Add(Xor(c, g), a);
+ f = Add(Xor(be, f), d);
+ k = Add(k, be);
+ k = Add(k, _mm_shuffle_epi8(f, h));
+ f = Add(f, g);
+ g = Add(g, f);
+ g = Add(_mm_set1_epi32(len), Mulc1(g));
+ } else {
+ // len >= 80
+ // The following is loosely modelled after farmhashmk::Hash32.
+ size_t iters = (len - 1) / 80;
+ len -= iters * 80;
+
+#undef Chunk
+#define Chunk() do { \
+ __m128i a = Fetch128(s); \
+ __m128i b = Fetch128(s + 16); \
+ __m128i c = Fetch128(s + 32); \
+ __m128i d = Fetch128(s + 48); \
+ __m128i e = Fetch128(s + 64); \
+ h = Add(h, a); \
+ g = Add(g, b); \
+ g = Shuffle0321(g); \
+ f = Add(f, c); \
+ __m128i be = Add(b, Mulc1(e)); \
+ h = Add(h, f); \
+ f = Add(f, h); \
+ h = Add(Murk(d, h), e); \
+ k = Xor(k, _mm_shuffle_epi8(g, f)); \
+ g = Add(Xor(c, g), a); \
+ f = Add(Xor(be, f), d); \
+ k = Add(k, be); \
+ k = Add(k, _mm_shuffle_epi8(f, h)); \
+ f = Add(f, g); \
+ g = Add(g, f); \
+ f = Mulc1(f); \
+} while (0)
+
+ while (iters-- != 0) {
+ Chunk();
+ s += 80;
+ }
+
+ if (len != 0) {
+ h = Add(h, _mm_set1_epi32(len));
+ s = s + len - 80;
+ Chunk();
+ }
+ }
+
+ g = Shuffle0321(g);
+ k = Xor(k, g);
+ f = Mulc1(f);
+ k = Mulc2(k);
+ g = Mulc1(g);
+ h = Mulc2(h);
+ k = Add(k, _mm_shuffle_epi8(g, f));
+ h = Add(h, f);
+ f = Add(f, h);
+ g = Add(g, k);
+ k = Add(k, g);
+ k = Xor(k, _mm_shuffle_epi8(f, h));
+ __m128i buf[4];
+ buf[0] = f;
+ buf[1] = g;
+ buf[2] = k;
+ buf[3] = h;
+ s = reinterpret_cast<char*>(buf);
+ uint32_t x = Fetch(s);
+ uint32_t y = Fetch(s+4);
+ uint32_t z = Fetch(s+8);
+ x = _mm_crc32_u32(x, Fetch(s+12));
+ y = _mm_crc32_u32(y, Fetch(s+16));
+ z = _mm_crc32_u32(z * c1, Fetch(s+20));
+ x = _mm_crc32_u32(x, Fetch(s+24));
+ y = _mm_crc32_u32(y * c1, Fetch(s+28));
+ uint32_t o = y;
+ z = _mm_crc32_u32(z, Fetch(s+32));
+ x = _mm_crc32_u32(x * c1, Fetch(s+36));
+ y = _mm_crc32_u32(y, Fetch(s+40));
+ z = _mm_crc32_u32(z * c1, Fetch(s+44));
+ x = _mm_crc32_u32(x, Fetch(s+48));
+ y = _mm_crc32_u32(y * c1, Fetch(s+52));
+ z = _mm_crc32_u32(z, Fetch(s+56));
+ x = _mm_crc32_u32(x, Fetch(s+60));
+ return (o - x + y - z) * c1;
+}
+
+#undef Chunk
+#undef Murk
+#undef Mulc2
+#undef Mulc1
+
+uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
+ if (len <= 24) {
+ if (len >= 13) return farmhashmk::Hash32Len13to24(s, len, seed * c1);
+ else if (len >= 5) return farmhashmk::Hash32Len5to12(s, len, seed);
+ else return farmhashmk::Hash32Len0to4(s, len, seed);
+ }
+ uint32_t h = farmhashmk::Hash32Len13to24(s, 24, seed ^ len);
+ return _mm_crc32_u32(Hash32(s + 24, len - 24) + seed, h);
+}
+
+#endif
+} // namespace farmhashsa
+namespace farmhashcc {
+// This file provides a 32-bit hash equivalent to CityHash32 (v1.1.1)
+// and a 128-bit hash equivalent to CityHash128 (v1.1.1). It also provides
+// a seeded 32-bit hash function similar to CityHash32.
+
+#undef Fetch
+#define Fetch Fetch32
+
+#undef Rotate
+#define Rotate Rotate32
+
+#undef Bswap
+#define Bswap Bswap32
+
+STATIC_INLINE uint32_t Hash32Len13to24(const char *s, size_t len) {
+ uint32_t a = Fetch(s - 4 + (len >> 1));
+ uint32_t b = Fetch(s + 4);
+ uint32_t c = Fetch(s + len - 8);
+ uint32_t d = Fetch(s + (len >> 1));
+ uint32_t e = Fetch(s);
+ uint32_t f = Fetch(s + len - 4);
+ uint32_t h = len;
+
+ return fmix(Mur(f, Mur(e, Mur(d, Mur(c, Mur(b, Mur(a, h)))))));
+}
+
+STATIC_INLINE uint32_t Hash32Len0to4(const char *s, size_t len) {
+ uint32_t b = 0;
+ uint32_t c = 9;
+ for (size_t i = 0; i < len; i++) {
+ signed char v = s[i];
+ b = b * c1 + v;
+ c ^= b;
+ }
+ return fmix(Mur(b, Mur(len, c)));
+}
+
+STATIC_INLINE uint32_t Hash32Len5to12(const char *s, size_t len) {
+ uint32_t a = len, b = len * 5, c = 9, d = b;
+ a += Fetch(s);
+ b += Fetch(s + len - 4);
+ c += Fetch(s + ((len >> 1) & 4));
+ return fmix(Mur(c, Mur(b, Mur(a, d))));
+}
+
+uint32_t Hash32(const char *s, size_t len) {
+ if (len <= 24) {
+ return len <= 12 ?
+ (len <= 4 ? Hash32Len0to4(s, len) : Hash32Len5to12(s, len)) :
+ Hash32Len13to24(s, len);
+ }
+
+ // len > 24
+ uint32_t h = len, g = c1 * len, f = g;
+ uint32_t a0 = Rotate(Fetch(s + len - 4) * c1, 17) * c2;
+ uint32_t a1 = Rotate(Fetch(s + len - 8) * c1, 17) * c2;
+ uint32_t a2 = Rotate(Fetch(s + len - 16) * c1, 17) * c2;
+ uint32_t a3 = Rotate(Fetch(s + len - 12) * c1, 17) * c2;
+ uint32_t a4 = Rotate(Fetch(s + len - 20) * c1, 17) * c2;
+ h ^= a0;
+ h = Rotate(h, 19);
+ h = h * 5 + 0xe6546b64;
+ h ^= a2;
+ h = Rotate(h, 19);
+ h = h * 5 + 0xe6546b64;
+ g ^= a1;
+ g = Rotate(g, 19);
+ g = g * 5 + 0xe6546b64;
+ g ^= a3;
+ g = Rotate(g, 19);
+ g = g * 5 + 0xe6546b64;
+ f += a4;
+ f = Rotate(f, 19);
+ f = f * 5 + 0xe6546b64;
+ size_t iters = (len - 1) / 20;
+ do {
+ uint32_t a0 = Rotate(Fetch(s) * c1, 17) * c2;
+ uint32_t a1 = Fetch(s + 4);
+ uint32_t a2 = Rotate(Fetch(s + 8) * c1, 17) * c2;
+ uint32_t a3 = Rotate(Fetch(s + 12) * c1, 17) * c2;
+ uint32_t a4 = Fetch(s + 16);
+ h ^= a0;
+ h = Rotate(h, 18);
+ h = h * 5 + 0xe6546b64;
+ f += a1;
+ f = Rotate(f, 19);
+ f = f * c1;
+ g += a2;
+ g = Rotate(g, 18);
+ g = g * 5 + 0xe6546b64;
+ h ^= a3 + a1;
+ h = Rotate(h, 19);
+ h = h * 5 + 0xe6546b64;
+ g ^= a4;
+ g = Bswap(g) * 5;
+ h += a4 * 5;
+ h = Bswap(h);
+ f += a0;
+ PERMUTE3(f, h, g);
+ s += 20;
+ } while (--iters != 0);
+ g = Rotate(g, 11) * c1;
+ g = Rotate(g, 17) * c1;
+ f = Rotate(f, 11) * c1;
+ f = Rotate(f, 17) * c1;
+ h = Rotate(h + g, 19);
+ h = h * 5 + 0xe6546b64;
+ h = Rotate(h, 17) * c1;
+ h = Rotate(h + f, 19);
+ h = h * 5 + 0xe6546b64;
+ h = Rotate(h, 17) * c1;
+ return h;
+}
+
+uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
+ if (len <= 24) {
+ if (len >= 13) return farmhashmk::Hash32Len13to24(s, len, seed * c1);
+ else if (len >= 5) return farmhashmk::Hash32Len5to12(s, len, seed);
+ else return farmhashmk::Hash32Len0to4(s, len, seed);
+ }
+ uint32_t h = farmhashmk::Hash32Len13to24(s, 24, seed ^ len);
+ return Mur(Hash32(s + 24, len - 24) + seed, h);
+}
+
+#undef Fetch
+#define Fetch Fetch64
+
+#undef Rotate
+#define Rotate Rotate64
+
+#undef Bswap
+#define Bswap Bswap64
+
+STATIC_INLINE uint64_t ShiftMix(uint64_t val) {
+ return val ^ (val >> 47);
+}
+
+STATIC_INLINE uint64_t HashLen16(uint64_t u, uint64_t v) {
+ return Hash128to64(Uint128(u, v));
+}
+
+STATIC_INLINE uint64_t HashLen16(uint64_t u, uint64_t v, uint64_t mul) {
+ // Murmur-inspired hashing.
+ uint64_t a = (u ^ v) * mul;
+ a ^= (a >> 47);
+ uint64_t b = (v ^ a) * mul;
+ b ^= (b >> 47);
+ b *= mul;
+ return b;
+}
+
+STATIC_INLINE uint64_t HashLen0to16(const char *s, size_t len) {
+ if (len >= 8) {
+ uint64_t mul = k2 + len * 2;
+ uint64_t a = Fetch(s) + k2;
+ uint64_t b = Fetch(s + len - 8);
+ uint64_t c = Rotate(b, 37) * mul + a;
+ uint64_t d = (Rotate(a, 25) + b) * mul;
+ return HashLen16(c, d, mul);
+ }
+ if (len >= 4) {
+ uint64_t mul = k2 + len * 2;
+ uint64_t a = Fetch32(s);
+ return HashLen16(len + (a << 3), Fetch32(s + len - 4), mul);
+ }
+ if (len > 0) {
+ uint8_t a = s[0];
+ uint8_t b = s[len >> 1];
+ uint8_t c = s[len - 1];
+ uint32_t y = static_cast<uint32_t>(a) + (static_cast<uint32_t>(b) << 8);
+ uint32_t z = len + (static_cast<uint32_t>(c) << 2);
+ return ShiftMix(y * k2 ^ z * k0) * k2;
+ }
+ return k2;
+}
+
+// Return a 16-byte hash for 48 bytes. Quick and dirty.
+// Callers do best to use "random-looking" values for a and b.
+STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
+ uint64_t w, uint64_t x, uint64_t y, uint64_t z, uint64_t a, uint64_t b) {
+ a += w;
+ b = Rotate(b + a + z, 21);
+ uint64_t c = a;
+ a += x;
+ a += y;
+ b += Rotate(a, 44);
+ return make_pair(a + z, b + c);
+}
+
+// Return a 16-byte hash for s[0] ... s[31], a, and b. Quick and dirty.
+STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
+ const char* s, uint64_t a, uint64_t b) {
+ return WeakHashLen32WithSeeds(Fetch(s),
+ Fetch(s + 8),
+ Fetch(s + 16),
+ Fetch(s + 24),
+ a,
+ b);
+}
+
+
+
+// A subroutine for CityHash128(). Returns a decent 128-bit hash for strings
+// of any length representable in signed long. Based on City and Murmur.
+STATIC_INLINE uint128_t CityMurmur(const char *s, size_t len, uint128_t seed) {
+ uint64_t a = Uint128Low64(seed);
+ uint64_t b = Uint128High64(seed);
+ uint64_t c = 0;
+ uint64_t d = 0;
+ signed long l = len - 16;
+ if (l <= 0) { // len <= 16
+ a = ShiftMix(a * k1) * k1;
+ c = b * k1 + HashLen0to16(s, len);
+ d = ShiftMix(a + (len >= 8 ? Fetch(s) : c));
+ } else { // len > 16
+ c = HashLen16(Fetch(s + len - 8) + k1, a);
+ d = HashLen16(b + len, c + Fetch(s + len - 16));
+ a += d;
+ do {
+ a ^= ShiftMix(Fetch(s) * k1) * k1;
+ a *= k1;
+ b ^= a;
+ c ^= ShiftMix(Fetch(s + 8) * k1) * k1;
+ c *= k1;
+ d ^= c;
+ s += 16;
+ l -= 16;
+ } while (l > 0);
+ }
+ a = HashLen16(a, c);
+ b = HashLen16(d, b);
+ return Uint128(a ^ b, HashLen16(b, a));
+}
+
+uint128_t CityHash128WithSeed(const char *s, size_t len, uint128_t seed) {
+ if (len < 128) {
+ return CityMurmur(s, len, seed);
+ }
+
+ // We expect len >= 128 to be the common case. Keep 56 bytes of state:
+ // v, w, x, y, and z.
+ pair<uint64_t, uint64_t> v, w;
+ uint64_t x = Uint128Low64(seed);
+ uint64_t y = Uint128High64(seed);
+ uint64_t z = len * k1;
+ v.first = Rotate(y ^ k1, 49) * k1 + Fetch(s);
+ v.second = Rotate(v.first, 42) * k1 + Fetch(s + 8);
+ w.first = Rotate(y + z, 35) * k1 + x;
+ w.second = Rotate(x + Fetch(s + 88), 53) * k1;
+
+ // This is the same inner loop as CityHash64(), manually unrolled.
+ do {
+ x = Rotate(x + y + v.first + Fetch(s + 8), 37) * k1;
+ y = Rotate(y + v.second + Fetch(s + 48), 42) * k1;
+ x ^= w.second;
+ y += v.first + Fetch(s + 40);
+ z = Rotate(z + w.first, 33) * k1;
+ v = WeakHashLen32WithSeeds(s, v.second * k1, x + w.first);
+ w = WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch(s + 16));
+ std::swap(z, x);
+ s += 64;
+ x = Rotate(x + y + v.first + Fetch(s + 8), 37) * k1;
+ y = Rotate(y + v.second + Fetch(s + 48), 42) * k1;
+ x ^= w.second;
+ y += v.first + Fetch(s + 40);
+ z = Rotate(z + w.first, 33) * k1;
+ v = WeakHashLen32WithSeeds(s, v.second * k1, x + w.first);
+ w = WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch(s + 16));
+ std::swap(z, x);
+ s += 64;
+ len -= 128;
+ } while (LIKELY(len >= 128));
+ x += Rotate(v.first + z, 49) * k0;
+ y = y * k0 + Rotate(w.second, 37);
+ z = z * k0 + Rotate(w.first, 27);
+ w.first *= 9;
+ v.first *= k0;
+ // If 0 < len < 128, hash up to 4 chunks of 32 bytes each from the end of s.
+ for (size_t tail_done = 0; tail_done < len; ) {
+ tail_done += 32;
+ y = Rotate(x + y, 42) * k0 + v.second;
+ w.first += Fetch(s + len - tail_done + 16);
+ x = x * k0 + w.first;
+ z += w.second + Fetch(s + len - tail_done);
+ w.second += v.first;
+ v = WeakHashLen32WithSeeds(s + len - tail_done, v.first + z, v.second);
+ v.first *= k0;
+ }
+ // At this point our 56 bytes of state should contain more than
+ // enough information for a strong 128-bit hash. We use two
+ // different 56-byte-to-8-byte hashes to get a 16-byte final result.
+ x = HashLen16(x, v.first);
+ y = HashLen16(y + z, w.first);
+ return Uint128(HashLen16(x + v.second, w.second) + y,
+ HashLen16(x + w.second, y + v.second));
+}
+
+STATIC_INLINE uint128_t CityHash128(const char *s, size_t len) {
+ return len >= 16 ?
+ CityHash128WithSeed(s + 16, len - 16,
+ Uint128(Fetch(s), Fetch(s + 8) + k0)) :
+ CityHash128WithSeed(s, len, Uint128(k0, k1));
+}
+
+uint128_t Fingerprint128(const char* s, size_t len) {
+ return CityHash128(s, len);
+}
+} // namespace farmhashcc
+namespace NAMESPACE_FOR_HASH_FUNCTIONS {
+
+// BASIC STRING HASHING
+
+// Hash function for a byte array. See also Hash(), below.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint32_t Hash32(const char* s, size_t len) {
+ return DebugTweak(
+ (can_use_sse41 & x86_64) ? farmhashnt::Hash32(s, len) :
+ (can_use_sse42 & can_use_aesni) ? farmhashsu::Hash32(s, len) :
+ can_use_sse42 ? farmhashsa::Hash32(s, len) :
+ farmhashmk::Hash32(s, len));
+}
+
+// Hash function for a byte array. For convenience, a 32-bit seed is also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint32_t Hash32WithSeed(const char* s, size_t len, uint32_t seed) {
+ return DebugTweak(
+ (can_use_sse41 & x86_64) ? farmhashnt::Hash32WithSeed(s, len, seed) :
+ (can_use_sse42 & can_use_aesni) ? farmhashsu::Hash32WithSeed(s, len, seed) :
+ can_use_sse42 ? farmhashsa::Hash32WithSeed(s, len, seed) :
+ farmhashmk::Hash32WithSeed(s, len, seed));
+}
+
+// Hash function for a byte array. For convenience, a 64-bit seed is also
+// hashed into the result. See also Hash(), below.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint64_t Hash64(const char* s, size_t len) {
+ return DebugTweak(
+ (can_use_sse42 & x86_64) ?
+ farmhashte::Hash64(s, len) :
+ farmhashxo::Hash64(s, len));
+}
+
+// Hash function for a byte array.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+size_t Hash(const char* s, size_t len) {
+ return sizeof(size_t) == 8 ? Hash64(s, len) : Hash32(s, len);
+}
+
+// Hash function for a byte array. For convenience, a 64-bit seed is also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint64_t Hash64WithSeed(const char* s, size_t len, uint64_t seed) {
+ return DebugTweak(farmhashna::Hash64WithSeed(s, len, seed));
+}
+
+// Hash function for a byte array. For convenience, two seeds are also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint64_t Hash64WithSeeds(const char* s, size_t len, uint64_t seed0, uint64_t seed1) {
+ return DebugTweak(farmhashna::Hash64WithSeeds(s, len, seed0, seed1));
+}
+
+// Hash function for a byte array.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint128_t Hash128(const char* s, size_t len) {
+ return DebugTweak(farmhashcc::Fingerprint128(s, len));
+}
+
+// Hash function for a byte array. For convenience, a 128-bit seed is also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint128_t Hash128WithSeed(const char* s, size_t len, uint128_t seed) {
+ return DebugTweak(farmhashcc::CityHash128WithSeed(s, len, seed));
+}
+
+// BASIC NON-STRING HASHING
+
+// FINGERPRINTING (i.e., good, portable, forever-fixed hash functions)
+
+// Fingerprint function for a byte array. Most useful in 32-bit binaries.
+uint32_t Fingerprint32(const char* s, size_t len) {
+ return farmhashmk::Hash32(s, len);
+}
+
+// Fingerprint function for a byte array.
+uint64_t Fingerprint64(const char* s, size_t len) {
+ return farmhashna::Hash64(s, len);
+}
+
+// Fingerprint function for a byte array.
+uint128_t Fingerprint128(const char* s, size_t len) {
+ return farmhashcc::Fingerprint128(s, len);
+}
+
+// Older and still available but perhaps not as fast as the above:
+// farmhashns::Hash32{,WithSeed}()
+
+} // namespace NAMESPACE_FOR_HASH_FUNCTIONS
+
+#if FARMHASHSELFTEST
+
+#ifndef FARMHASH_SELF_TEST_GUARD
+#define FARMHASH_SELF_TEST_GUARD
+#include <cstdio>
+#include <iostream>
+#include <string.h>
+
+using std::cout;
+using std::cerr;
+using std::endl;
+using std::hex;
+
+static const uint64_t kSeed0 = 1234567;
+static const uint64_t kSeed1 = k0;
+static const int kDataSize = 1 << 20;
+static const int kTestSize = 300;
+#define kSeed128 Uint128(kSeed0, kSeed1)
+
+static char data[kDataSize];
+
+static int completed_self_tests = 0;
+static int errors = 0;
+
+// Initialize data to pseudorandom values.
+void Setup() {
+ if (completed_self_tests == 0) {
+ uint64_t a = 9;
+ uint64_t b = 777;
+ for (int i = 0; i < kDataSize; i++) {
+ a += b;
+ b += a;
+ a = (a ^ (a >> 41)) * k0;
+ b = (b ^ (b >> 41)) * k0 + i;
+ uint8_t u = b >> 37;
+ memcpy(data + i, &u, 1); // uint8_t -> char
+ }
+ }
+}
+
+int NoteErrors() {
+#define NUM_SELF_TESTS 9
+ if (++completed_self_tests == NUM_SELF_TESTS)
+ std::exit(errors > 0);
+ return errors;
+}
+
+template <typename T> inline bool IsNonZero(T x) {
+ return x != 0;
+}
+
+template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
+ return x != Uint128(0, 0);
+}
+
+#endif // FARMHASH_SELF_TEST_GUARD
+
+namespace farmhashccTest {
+
+uint32_t CreateSeed(int offset, int salt) {
+ uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h += static_cast<uint32_t>(offset & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ return h;
+}
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+#define SEED CreateSeed(offset, -1)
+#define SEED0 CreateSeed(offset, 0)
+#define SEED1 CreateSeed(offset, 1)
+
+#undef TESTING
+#define TESTING 1
+#if TESTING
+uint32_t expected[] = {
+4223616069u,
+3696677242u,
+1039179260u, 1690343979u, 1018511555u, 2464489001u,
+20368522u, 2663783964u, 175201532u, 1619210592u,
+4081014168u,
+2576519988u,
+3285042206u, 502478099u, 739479538u, 1500332790u,
+13754768u, 3789353455u, 3473868058u, 1909255088u,
+2212771159u,
+1112731063u,
+826915357u, 2893489933u, 118369799u, 1848668220u,
+1308219822u, 249416982u, 64306364u, 4221800195u,
+1020067935u,
+3955445564u,
+563346294u, 550236731u, 2339016688u, 1826259714u,
+3872358639u, 2295981050u, 1870005390u, 4015628802u,
+1451961420u,
+653440099u,
+1292493871u, 164377749u, 1717712483u, 463414587u,
+3924343675u, 1050492084u, 3566618804u, 2046983362u,
+31917516u,
+2957164615u,
+230718965u, 999595115u, 3534822176u, 2175709186u,
+965707431u, 441796222u, 2481718051u, 1827777486u,
+2590087362u,
+3879448744u,
+3515079898u, 1601433082u, 982764532u, 254808716u,
+1293372530u, 4205605817u, 947001462u, 1138890052u,
+176305566u,
+2447367541u,
+2973802542u, 4123621138u, 3083865840u, 1706367795u,
+792114347u, 2880110657u, 440613768u, 195054868u,
+1359016305u,
+3363804638u,
+649488537u, 1624045597u, 1441938215u, 3147758996u,
+3199173578u, 2597283203u, 2191333609u, 3763129144u,
+1117290165u,
+1062549743u,
+2565615889u, 1046361554u, 1581968261u, 1058773671u,
+1123053168u, 3807622275u, 1486749916u, 3900816089u,
+2437877004u,
+1894455839u,
+1912520953u, 1914997013u, 561048608u, 1643267444u,
+3671572006u, 194811086u, 1468911468u, 2179206286u,
+673206794u,
+3486923651u,
+3741426466u, 3292160512u, 697001377u, 1900763774u,
+3726097344u, 629282039u, 3578723715u, 2868028489u,
+3269862919u,
+2303349487u,
+3643953525u, 2307255916u, 849996280u, 732080434u,
+909961480u, 3542445214u, 2628347095u, 4236856917u,
+1380660650u,
+2631821908u,
+2007289004u, 3509705198u, 3788541675u, 789457322u,
+3090670546u, 638977894u, 3503881773u, 947102987u,
+1525325287u,
+1816697045u,
+2706647405u, 288763142u, 3505438495u, 481308609u,
+2882636782u, 3745162621u, 3503467033u, 428247823u,
+176408838u,
+333551502u,
+1001068721u, 1681483651u, 75380831u, 4191469679u,
+3627361839u, 2736617386u, 3120737438u, 1297502456u,
+864896482u,
+85674920u,
+2886047255u, 4119881331u, 2496990525u, 3442502055u,
+1806582817u, 3186345024u, 4099591287u, 2560171465u,
+3489229104u,
+3065015872u,
+2755089808u, 3098442882u, 378524719u, 2664097023u,
+1771960725u, 2901182183u, 55258521u, 1266621443u,
+581644891u,
+37790450u,
+1800731704u, 3601350920u, 53428754u, 2759476837u,
+3391093099u, 1496510311u, 2511119507u, 2636877410u,
+631613207u,
+1573846064u,
+260484875u, 1088212603u, 2369525206u, 322522428u,
+3191396600u, 2076543340u, 1552496658u, 2739811558u,
+3867875546u,
+2051584261u,
+2126250818u, 901517871u, 3651631165u, 1323139145u,
+1521111765u, 477802997u, 3508559783u, 383954241u,
+3804516756u,
+4250206331u,
+2655954340u, 2484996477u, 1417544845u, 1520282298u,
+2745204366u, 2869345147u, 1872738335u, 2592877343u,
+1619744564u,
+1804962124u,
+3458679890u, 423948620u, 273645618u, 4187865426u,
+376057175u, 2943431463u, 3581950599u, 1035398331u,
+1088213445u,
+861988903u,
+1323370244u, 777069428u, 506235917u, 369720851u,
+2789995854u, 230915180u, 1505086948u, 940361236u,
+3727873235u,
+1159167499u,
+1860302871u, 3456858862u, 3923555152u, 2131072714u,
+2910461068u, 3671950363u, 2010742682u, 4088068851u,
+3616470388u,
+2087714788u,
+221675509u, 1230154072u, 3450704646u, 1463226695u,
+1998357699u, 266026801u, 619568740u, 3560427266u,
+4148162586u,
+3150417316u,
+1356375822u, 2056097622u, 627905802u, 3881675638u,
+2309738053u, 971916703u, 3447805361u, 1673575328u,
+673084328u,
+3317849401u,
+2836362782u, 2377208890u, 3275350588u, 158350552u,
+2553241779u, 2497264995u, 3262882649u, 3897937187u,
+1598963653u,
+3068514414u,
+601541505u, 374517071u, 3380795976u, 235752573u,
+284670003u, 2990192160u, 904937105u, 2306579150u,
+2117362589u,
+1635274830u,
+3355572906u, 170799903u, 1226685528u, 664567688u,
+413219134u, 878324258u, 4026159448u, 3620649295u,
+1823625377u,
+3175888439u,
+1759344347u, 2640637095u, 3549558u, 2192984935u,
+978623493u, 804017880u, 3877562323u, 3843116489u,
+1641748342u,
+1853539444u,
+3001178468u, 3443560727u, 2685426077u, 1653064722u,
+349231508u, 2726789654u, 3136215581u, 768402830u,
+269384321u,
+531936536u,
+2592883487u, 1343156334u, 3628619802u, 1477143570u,
+4269458419u, 3285611028u, 959104925u, 2712290710u,
+3480237248u,
+835796333u,
+2020636251u, 1191914589u, 126521603u, 4288023938u,
+3731699932u, 2136758855u, 985780142u, 193807575u,
+1850544433u,
+653947619u,
+3929316796u, 381871169u, 950486363u, 1787262279u,
+360480382u, 1800636585u, 1039258631u, 3682073259u,
+1262819303u,
+1786000319u,
+1570627191u, 893065837u, 301304916u, 1478469809u,
+623018819u, 2742232545u, 2058913014u, 1706060059u,
+2421125401u,
+1315829592u,
+3208766775u, 1805586156u, 575853086u, 3085025513u,
+4010908260u, 2344058256u, 3814407434u, 1458485673u,
+2474514786u,
+3581895658u,
+2710719679u, 190812706u, 2135454262u, 2620080728u,
+3400757986u, 1669914857u, 1559978393u, 1629811331u,
+3096616493u,
+1391424435u,
+4158376003u, 1015657076u, 794783832u, 479952178u,
+1150290207u, 2497437906u, 231815090u, 755078067u,
+3832053281u,
+63649475u,
+2415822606u, 4105027719u, 1706992318u, 1106598740u,
+3941945667u, 1271300761u, 505882259u, 760186809u,
+2657183368u,
+1925422058u,
+1039773764u, 880219458u, 4275949176u, 1556833823u,
+925882132u, 4216310340u, 757497522u, 461833914u,
+3884002070u,
+2790957660u,
+2100050089u, 651959176u, 1380301291u, 1289124125u,
+452314403u, 226156280u, 3306924715u, 1750807758u,
+2290180542u,
+1953760569u,
+2253069096u, 3960924806u, 1786291620u, 60736185u,
+2569018293u, 3870479674u, 2247005661u, 2239850953u,
+4261808536u,
+3282975782u,
+780945879u, 3349849383u, 1579362556u, 2265045884u,
+905088740u, 725212379u, 3156479246u, 2501620391u,
+3062836263u,
+4070422690u,
+996797869u, 4082582315u, 976105756u, 303983602u,
+1862104804u, 3864508254u, 3383979677u, 2835500286u,
+2798364010u,
+519359476u,
+3447342725u, 194373889u, 3313466630u, 232399983u,
+2841787856u, 1672751454u, 3345183154u, 1805381384u,
+2226129336u,
+2847829057u,
+2350774567u, 2838540121u, 2757948482u, 1017002062u,
+2329150951u, 2171488196u, 3668619047u, 3874977844u,
+3287966998u,
+262346753u,
+2493054715u, 2298644430u, 2926101182u, 1528457638u,
+598656233u, 2615845874u, 989110727u, 820441411u,
+253617372u,
+2201077208u,
+2047569338u, 3114356329u, 3335563734u, 2967673540u,
+768438341u, 1417708203u, 3873718246u, 1538441843u,
+1279167650u,
+3917966776u,
+2218481734u, 1015935150u, 1957845042u, 1318150213u,
+3146423971u, 4218994877u, 1162470863u, 1519718292u,
+2594658906u,
+665870414u,
+3430347817u, 3933868731u, 1597041394u, 3138684682u,
+3398212027u, 1064647658u, 1576321132u, 14792918u,
+224938029u,
+3706456050u,
+847274786u, 2645698692u, 1743374687u, 2343133224u,
+3066596790u, 2857270120u, 200596308u, 452055528u,
+2319312082u,
+3488655402u,
+4146865894u, 608206438u, 2699777051u, 3687240713u,
+327957508u, 3664730153u, 568134564u, 2993484554u,
+4159860363u,
+4274533921u,
+1079994063u, 2360220210u, 3609597760u, 3639708902u,
+2836180437u, 1069910270u, 1892427666u, 1874729790u,
+1267712826u,
+121886940u,
+3572289214u, 2475945610u, 783779452u, 588827737u,
+1531395014u, 2085084212u, 2219189792u, 3981444548u,
+2218885336u,
+1691622694u,
+2053232885u, 1386558530u, 2182946189u, 2365247285u,
+1871081313u, 2935751853u, 38413723u, 543465863u,
+900691890u,
+2899905665u,
+575120562u, 93133904u, 457154948u, 2983705792u,
+4232229200u, 2038565963u, 614693984u, 3405328302u,
+4083090010u,
+2088004171u,
+244031209u, 1861889294u, 2417109253u, 3299562328u,
+4158642443u, 4199064449u, 3161611046u, 885015950u,
+3677904099u,
+2969861785u,
+772348805u, 1712263832u, 3219357614u, 484271305u,
+3645706114u, 2059620251u, 409557488u, 2278896731u,
+224475749u,
+3523022952u,
+2057140088u, 449131785u, 1149879244u, 4255363996u,
+3602720135u, 1690010854u, 2503998822u, 2750828466u,
+3340671802u,
+1447583863u,
+2649684943u, 2764747249u, 3046070595u, 3441726138u,
+3840332559u, 3156747501u, 1288666680u, 1472744459u,
+3452391933u,
+1617542784u,
+217869690u, 3718469527u, 348639731u, 590532355u,
+43789787u, 22606314u, 1621559290u, 2231743261u,
+2234620879u,
+544748955u,
+3169387920u, 203343594u, 3272552527u, 1078282365u,
+809576321u, 854207584u, 3625491053u, 1193737267u,
+1628966807u,
+2661421060u,
+2433442061u, 3886639039u, 2149304418u, 303000565u,
+1432830882u, 137378235u, 1135974068u, 318705754u,
+2491227157u,
+2627534472u,
+3520352233u, 2488397682u, 3969194920u, 3843962181u,
+2135981459u, 2611933220u, 799460731u, 2300968851u,
+3412851628u,
+3070914013u,
+3555224260u, 4125937572u, 240359903u, 722496673u,
+2061023600u, 3843919221u, 2759960043u, 1191155322u,
+1504041490u,
+3735253656u,
+1773124736u, 101110011u, 1627699578u, 2645634551u,
+263603947u, 1388368439u, 677146538u, 1644201982u,
+2625699644u,
+2403862553u,
+2426069017u, 3613511705u, 915141802u, 2981654265u,
+3474818167u, 2611101773u, 627891434u, 762754924u,
+2143021902u,
+51067670u,
+4017746573u, 2269879853u, 3037857950u, 2388899692u,
+582729171u, 1886116725u, 2281219772u, 264704948u,
+3509984037u,
+4078683368u,
+2172959411u, 1807195632u, 3357092302u, 2253764928u,
+2320369390u, 3076335959u, 2623583210u, 168378015u,
+1435562650u,
+1100977467u,
+3160490319u, 2550328495u, 2396855930u, 1347823908u,
+1617990918u, 3849653099u, 3224111576u, 1681539821u,
+4171542880u,
+552200045u,
+3562947778u, 1676237880u, 3747732307u, 2453332913u,
+865530667u, 3566636849u, 3485502777u, 336779723u,
+2535942410u,
+1685000184u,
+820545711u, 1893670486u, 1273910461u, 1193758569u,
+970365241u, 381205962u, 3612810852u, 1160577445u,
+541488143u,
+4005031080u,
+2333965236u, 2419855455u, 3484533538u, 3073937876u,
+908466956u, 661391539u, 2342122412u, 1467049112u,
+1785800827u,
+135343033u,
+139643209u, 2438375667u, 974654058u, 3216478230u,
+3807620420u, 779043363u, 2812846449u, 333254784u,
+1025244024u,
+2242303095u,
+2476683742u, 350018683u, 174652916u, 933097576u,
+826905896u, 559603581u, 2777181260u, 164915169u,
+4070353203u,
+1459055748u,
+297303985u, 3103837241u, 3812514233u, 232265137u,
+2032819099u, 1523091376u, 3531238208u, 1403510182u,
+2886832080u,
+2599705941u,
+2789695716u, 68437968u, 3823813791u, 1040994569u,
+3024194990u, 2461740520u, 3735391266u, 2042207153u,
+2461678616u,
+3519231840u,
+1344224923u, 411442756u, 1179779351u, 7661528u,
+778352196u, 3288808867u, 589356197u, 2627504511u,
+3374744599u,
+3312172905u,
+357423007u, 3539567796u, 4044452215u, 1445118403u,
+2937983820u, 184089910u, 346201845u, 2427295202u,
+1345448010u,
+2884434843u,
+3085001879u, 2640105409u, 315310640u, 3530289798u,
+3362974764u, 963602652u, 75228477u, 3509381180u,
+4012777756u,
+2380345941u,
+1073137836u, 2083960378u, 1220315185u, 3628720934u,
+3508867818u, 67148343u, 3558085158u, 1753943368u,
+863309561u,
+2844713625u,
+441921850u, 854732254u, 816793316u, 2555428747u,
+3440623414u, 1707304366u, 3189874375u, 1623229221u,
+1220335976u,
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+3991630434u, 2876458763u, 1179167079u, 536360759u,
+1592117159u,
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+1152907972u, 2326185495u, 2939973666u, 4181120253u,
+552831733u,
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+3395829380u, 3316562752u, 2168409017u, 614624786u,
+3585854336u,
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+3195850578u, 3396793277u, 3519870267u, 527857605u,
+3972392320u,
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+4047225561u, 3271434798u, 3192704713u, 2798505213u,
+3932215896u, 3792924012u, 3796843756u, 453872975u,
+4050552799u,
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+928166947u, 121311642u, 930989547u, 2087070683u,
+1288978057u, 1556325239u, 1812435626u, 1682385724u,
+1214364933u,
+904760776u,
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+3424837835u, 3833550693u, 1799375326u, 2012368921u,
+2768764136u,
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+4055479315u, 3751639533u, 2808224623u, 3492656387u,
+1306824780u, 2624000170u, 3134795218u, 1778409297u,
+3900821801u,
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+};
+
+// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
+bool Test(int offset, int len = 0) {
+#undef Check
+#undef IsAlive
+
+#define Check(x) do { \
+ const uint32_t actual = (x), e = expected[index++]; \
+ bool ok = actual == e; \
+ if (!ok) { \
+ cerr << "expected " << hex << e << " but got " << actual << endl; \
+ ++errors; \
+ } \
+ assert(ok); \
+} while (0)
+
+#define IsAlive(x) do { alive += IsNonZero(x); } while (0)
+
+ // After the following line is where the uses of "Check" and such will go.
+ static int index = 0;
+if (offset == -1) { int alive = 0; IsAlive(farmhashcc::Hash32WithSeed(data, len++, SEED)); IsAlive(farmhashcc::Hash32(data, len++)); { uint128_t u = farmhashcc::Fingerprint128(data, len++); uint64_t h = Uint128Low64(u); IsAlive(h >> 32); IsAlive((h << 32) >> 32); h = Uint128High64(u); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } len -= 3; return alive > 0; }
+Check(farmhashcc::Hash32WithSeed(data + offset, len, SEED));
+Check(farmhashcc::Hash32(data + offset, len));
+{ uint128_t u = farmhashcc::Fingerprint128(data + offset, len); uint64_t h = Uint128Low64(u); Check(h >> 32); Check((h << 32) >> 32); h = Uint128High64(u); Check(h >> 32); Check((h << 32) >> 32); }
+{ uint128_t u = farmhashcc::CityHash128WithSeed(data + offset, len, Uint128(SEED0, SEED1)); uint64_t h = Uint128Low64(u); Check(h >> 32); Check((h << 32) >> 32); h = Uint128High64(u); Check(h >> 32); Check((h << 32) >> 32); }
+
+ return true;
+#undef Check
+#undef IsAlive
+}
+
+int RunTest() {
+ Setup();
+ int i = 0;
+ cout << "Running farmhashccTest";
+ if (!Test(-1)) {
+ cout << "... Unavailable\n";
+ return NoteErrors();
+ }
+ // Good. The function is attempting to hash, so run the full test.
+ int errors_prior_to_test = errors;
+ for ( ; i < kTestSize - 1; i++) {
+ Test(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ Test(0, i);
+ }
+ Test(0, kDataSize);
+ cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
+ return NoteErrors();
+}
+
+#else
+
+// After the following line is where the code to print hash codes will go.
+void Dump(int offset, int len) {
+cout << farmhashcc::Hash32WithSeed(data + offset, len, SEED) << "u," << endl;
+cout << farmhashcc::Hash32(data + offset, len) << "u," << endl;
+{ uint128_t u = farmhashcc::Fingerprint128(data + offset, len); uint64_t h = Uint128Low64(u); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u, "; h = Uint128High64(u); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+{ uint128_t u = farmhashcc::CityHash128WithSeed(data + offset, len, Uint128(SEED0, SEED1)); uint64_t h = Uint128Low64(u); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u, "; h = Uint128High64(u); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+}
+
+#endif
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+
+} // namespace farmhashccTest
+
+#if !TESTING
+int main(int argc, char** argv) {
+ Setup();
+ cout << "uint32_t expected[] = {\n";
+ int i = 0;
+ for ( ; i < kTestSize - 1; i++) {
+ farmhashccTest::Dump(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ farmhashccTest::Dump(0, i);
+ }
+ farmhashccTest::Dump(0, kDataSize);
+ cout << "};\n";
+}
+#endif
+#ifndef FARMHASH_SELF_TEST_GUARD
+#define FARMHASH_SELF_TEST_GUARD
+#include <cstdio>
+#include <iostream>
+#include <string.h>
+
+using std::cout;
+using std::cerr;
+using std::endl;
+using std::hex;
+
+static const uint64_t kSeed0 = 1234567;
+static const uint64_t kSeed1 = k0;
+static const int kDataSize = 1 << 20;
+static const int kTestSize = 300;
+#define kSeed128 Uint128(kSeed0, kSeed1)
+
+static char data[kDataSize];
+
+static int completed_self_tests = 0;
+static int errors = 0;
+
+// Initialize data to pseudorandom values.
+void Setup() {
+ if (completed_self_tests == 0) {
+ uint64_t a = 9;
+ uint64_t b = 777;
+ for (int i = 0; i < kDataSize; i++) {
+ a += b;
+ b += a;
+ a = (a ^ (a >> 41)) * k0;
+ b = (b ^ (b >> 41)) * k0 + i;
+ uint8_t u = b >> 37;
+ memcpy(data + i, &u, 1); // uint8_t -> char
+ }
+ }
+}
+
+int NoteErrors() {
+#define NUM_SELF_TESTS 9
+ if (++completed_self_tests == NUM_SELF_TESTS)
+ std::exit(errors > 0);
+ return errors;
+}
+
+template <typename T> inline bool IsNonZero(T x) {
+ return x != 0;
+}
+
+template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
+ return x != Uint128(0, 0);
+}
+
+#endif // FARMHASH_SELF_TEST_GUARD
+
+namespace farmhashmkTest {
+
+uint32_t CreateSeed(int offset, int salt) {
+ uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h += static_cast<uint32_t>(offset & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ return h;
+}
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+#define SEED CreateSeed(offset, -1)
+#define SEED0 CreateSeed(offset, 0)
+#define SEED1 CreateSeed(offset, 1)
+
+#undef TESTING
+#define TESTING 1
+#if TESTING
+uint32_t expected[] = {
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+};
+
+// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
+bool Test(int offset, int len = 0) {
+#undef Check
+#undef IsAlive
+
+#define Check(x) do { \
+ const uint32_t actual = (x), e = expected[index++]; \
+ bool ok = actual == e; \
+ if (!ok) { \
+ cerr << "expected " << hex << e << " but got " << actual << endl; \
+ ++errors; \
+ } \
+ assert(ok); \
+} while (0)
+
+#define IsAlive(x) do { alive += IsNonZero(x); } while (0)
+
+ // After the following line is where the uses of "Check" and such will go.
+ static int index = 0;
+if (offset == -1) { int alive = 0; IsAlive(farmhashmk::Hash32WithSeed(data, len++, SEED)); IsAlive(farmhashmk::Hash32(data, len++)); IsAlive(farmhashmk::Hash32(data, len++)); len -= 3; return alive > 0; }
+Check(farmhashmk::Hash32WithSeed(data + offset, len, SEED));
+Check(farmhashmk::Hash32(data + offset, len));
+
+ return true;
+#undef Check
+#undef IsAlive
+}
+
+int RunTest() {
+ Setup();
+ int i = 0;
+ cout << "Running farmhashmkTest";
+ if (!Test(-1)) {
+ cout << "... Unavailable\n";
+ return NoteErrors();
+ }
+ // Good. The function is attempting to hash, so run the full test.
+ int errors_prior_to_test = errors;
+ for ( ; i < kTestSize - 1; i++) {
+ Test(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ Test(0, i);
+ }
+ Test(0, kDataSize);
+ cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
+ return NoteErrors();
+}
+
+#else
+
+// After the following line is where the code to print hash codes will go.
+void Dump(int offset, int len) {
+cout << farmhashmk::Hash32WithSeed(data + offset, len, SEED) << "u," << endl;
+cout << farmhashmk::Hash32(data + offset, len) << "u," << endl;
+}
+
+#endif
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+
+} // namespace farmhashmkTest
+
+#if !TESTING
+int main(int argc, char** argv) {
+ Setup();
+ cout << "uint32_t expected[] = {\n";
+ int i = 0;
+ for ( ; i < kTestSize - 1; i++) {
+ farmhashmkTest::Dump(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ farmhashmkTest::Dump(0, i);
+ }
+ farmhashmkTest::Dump(0, kDataSize);
+ cout << "};\n";
+}
+#endif
+#ifndef FARMHASH_SELF_TEST_GUARD
+#define FARMHASH_SELF_TEST_GUARD
+#include <cstdio>
+#include <iostream>
+#include <string.h>
+
+using std::cout;
+using std::cerr;
+using std::endl;
+using std::hex;
+
+static const uint64_t kSeed0 = 1234567;
+static const uint64_t kSeed1 = k0;
+static const int kDataSize = 1 << 20;
+static const int kTestSize = 300;
+#define kSeed128 Uint128(kSeed0, kSeed1)
+
+static char data[kDataSize];
+
+static int completed_self_tests = 0;
+static int errors = 0;
+
+// Initialize data to pseudorandom values.
+void Setup() {
+ if (completed_self_tests == 0) {
+ uint64_t a = 9;
+ uint64_t b = 777;
+ for (int i = 0; i < kDataSize; i++) {
+ a += b;
+ b += a;
+ a = (a ^ (a >> 41)) * k0;
+ b = (b ^ (b >> 41)) * k0 + i;
+ uint8_t u = b >> 37;
+ memcpy(data + i, &u, 1); // uint8_t -> char
+ }
+ }
+}
+
+int NoteErrors() {
+#define NUM_SELF_TESTS 9
+ if (++completed_self_tests == NUM_SELF_TESTS)
+ std::exit(errors > 0);
+ return errors;
+}
+
+template <typename T> inline bool IsNonZero(T x) {
+ return x != 0;
+}
+
+template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
+ return x != Uint128(0, 0);
+}
+
+#endif // FARMHASH_SELF_TEST_GUARD
+
+namespace farmhashnaTest {
+
+uint32_t CreateSeed(int offset, int salt) {
+ uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h += static_cast<uint32_t>(offset & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ return h;
+}
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+#define SEED CreateSeed(offset, -1)
+#define SEED0 CreateSeed(offset, 0)
+#define SEED1 CreateSeed(offset, 1)
+
+#undef TESTING
+#define TESTING 1
+#if TESTING
+uint32_t expected[] = {
+1140953930u, 861465670u,
+3277735313u, 2681724312u,
+2598464059u, 797982799u,
+890626835u, 800175912u,
+2603993599u, 921001710u,
+1410420968u, 2134990486u,
+3283896453u, 1867689945u,
+2914424215u, 2244477846u,
+255297188u, 2992121793u,
+1110588164u, 4186314283u,
+161451183u, 3943596029u,
+4019337850u, 452431531u,
+283198166u, 2741341286u,
+3379021470u, 2557197665u,
+299850021u, 2532580744u,
+452473466u, 1706958772u,
+1298374911u, 3099673830u,
+2199864459u, 3696623795u,
+236935126u, 2976578695u,
+4055299123u, 3281581178u,
+1053458494u, 1882212500u,
+2305012065u, 2169731866u,
+3456121707u, 275903667u,
+458884671u, 3033004529u,
+3058973506u, 2379411653u,
+1898235244u, 1402319660u,
+2700149065u, 2699376854u,
+147814787u, 720739346u,
+2433714046u, 4222949502u,
+4220361840u, 1712034059u,
+3425469811u, 3690733394u,
+4148372108u, 1330324210u,
+594028478u, 2921867846u,
+1635026870u, 192883107u,
+780716741u, 1728752234u,
+3280331829u, 326029180u,
+3969463346u, 1436364519u,
+393215742u, 3349570000u,
+3824583307u, 1612122221u,
+2859809759u, 3808705738u,
+1379537552u, 1646032583u,
+2233466664u, 1432476832u,
+4023053163u, 2650381482u,
+2052294713u, 3552092450u,
+1628777059u, 1499109081u,
+3476440786u, 3829307897u,
+2960536756u, 1554038301u,
+1145519619u, 3190844552u,
+2902102606u, 3600725550u,
+237495366u, 540224401u,
+65721842u, 489963606u,
+1448662590u, 397635823u,
+1596489240u, 1562872448u,
+1790705123u, 2128624475u,
+180854224u, 2604346966u,
+1435705557u, 1262831810u,
+155445229u, 1672724608u,
+1669465176u, 1341975128u,
+663607706u, 2077310004u,
+3610042449u, 1911523866u,
+1043692997u, 1454396064u,
+2563776023u, 294527927u,
+1099072299u, 1389770549u,
+703505868u, 678706990u,
+2952353448u, 2026137563u,
+3603803785u, 629449419u,
+1933894405u, 3043213226u,
+226132789u, 2489287368u,
+1552847036u, 645684964u,
+3828089804u, 3632594520u,
+187883449u, 230403464u,
+3151491850u, 3272648435u,
+3729087873u, 1303930448u,
+2002861219u, 165370827u,
+916494250u, 1230085527u,
+3103338579u, 3064290191u,
+3807265751u, 3628174014u,
+231181488u, 851743255u,
+2295806711u, 1781190011u,
+2988893883u, 1554380634u,
+1142264800u, 3667013118u,
+1968445277u, 315203929u,
+2638023604u, 2290487377u,
+732137533u, 1909203251u,
+440398219u, 1891630171u,
+1380301172u, 1498556724u,
+4072067757u, 4165088768u,
+4204318635u, 441430649u,
+3931792696u, 197618179u,
+956300927u, 914413116u,
+3010839769u, 2837339569u,
+2148126371u, 1913303225u,
+3074915312u, 3117299654u,
+4139181436u, 2993479124u,
+3178848746u, 1357272220u,
+1438494951u, 507436733u,
+667183474u, 2084369203u,
+3854939912u, 1413396341u,
+126024219u, 146044391u,
+1016656857u, 3022024459u,
+3254014218u, 429095991u,
+165589978u, 1578546616u,
+985653208u, 1718653828u,
+623071693u, 366414107u,
+249776086u, 1207522198u,
+3047342438u, 2991127487u,
+3120876698u, 1684583131u,
+46987739u, 1157614300u,
+863214540u, 1087193030u,
+199124911u, 520792961u,
+3614377032u, 586863115u,
+3331828431u, 1013201099u,
+1716848157u, 4033596884u,
+1164298657u, 4140791139u,
+1146169032u, 1434258493u,
+3824360466u, 3242407770u,
+3725511003u, 232064808u,
+872586426u, 762243036u,
+2736953692u, 816692935u,
+512845449u, 3748861010u,
+2266795890u, 3781899767u,
+4290630595u, 517646945u,
+22638523u, 648000590u,
+959214578u, 558910384u,
+1283799121u, 3047062993u,
+1024246061u, 4027776454u,
+3544509313u, 622325861u,
+834785312u, 382936554u,
+411505255u, 1973395102u,
+1825135056u, 2725923798u,
+580988377u, 2826990641u,
+3474970689u, 1029055034u,
+812546227u, 2506885666u,
+2584372201u, 1758123094u,
+589567754u, 325737734u,
+345313518u, 2022370576u,
+3886113119u, 3338548567u,
+257578986u, 3698087965u,
+1776047957u, 1771384107u,
+3604937815u, 3198590202u,
+2305332220u, 191910725u,
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+};
+
+// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
+bool Test(int offset, int len = 0) {
+#undef Check
+#undef IsAlive
+
+#define Check(x) do { \
+ const uint32_t actual = (x), e = expected[index++]; \
+ bool ok = actual == e; \
+ if (!ok) { \
+ cerr << "expected " << hex << e << " but got " << actual << endl; \
+ ++errors; \
+ } \
+ assert(ok); \
+} while (0)
+
+#define IsAlive(x) do { alive += IsNonZero(x); } while (0)
+
+ // After the following line is where the uses of "Check" and such will go.
+ static int index = 0;
+if (offset == -1) { int alive = 0; { uint64_t h = farmhashna::Hash64WithSeeds(data, len++, SEED0, SEED1); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } { uint64_t h = farmhashna::Hash64WithSeed(data, len++, SEED); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } { uint64_t h = farmhashna::Hash64(data, len++); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } len -= 3; return alive > 0; }
+{ uint64_t h = farmhashna::Hash64WithSeeds(data + offset, len, SEED0, SEED1); Check(h >> 32); Check((h << 32) >> 32); }
+{ uint64_t h = farmhashna::Hash64WithSeed(data + offset, len, SEED); Check(h >> 32); Check((h << 32) >> 32); }
+{ uint64_t h = farmhashna::Hash64(data + offset, len); Check(h >> 32); Check((h << 32) >> 32); }
+
+ return true;
+#undef Check
+#undef IsAlive
+}
+
+int RunTest() {
+ Setup();
+ int i = 0;
+ cout << "Running farmhashnaTest";
+ if (!Test(-1)) {
+ cout << "... Unavailable\n";
+ return NoteErrors();
+ }
+ // Good. The function is attempting to hash, so run the full test.
+ int errors_prior_to_test = errors;
+ for ( ; i < kTestSize - 1; i++) {
+ Test(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ Test(0, i);
+ }
+ Test(0, kDataSize);
+ cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
+ return NoteErrors();
+}
+
+#else
+
+// After the following line is where the code to print hash codes will go.
+void Dump(int offset, int len) {
+{ uint64_t h = farmhashna::Hash64WithSeeds(data + offset, len, SEED0, SEED1); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+{ uint64_t h = farmhashna::Hash64WithSeed(data + offset, len, SEED); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+{ uint64_t h = farmhashna::Hash64(data + offset, len); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+}
+
+#endif
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+
+} // namespace farmhashnaTest
+
+#if !TESTING
+int main(int argc, char** argv) {
+ Setup();
+ cout << "uint32_t expected[] = {\n";
+ int i = 0;
+ for ( ; i < kTestSize - 1; i++) {
+ farmhashnaTest::Dump(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ farmhashnaTest::Dump(0, i);
+ }
+ farmhashnaTest::Dump(0, kDataSize);
+ cout << "};\n";
+}
+#endif
+#ifndef FARMHASH_SELF_TEST_GUARD
+#define FARMHASH_SELF_TEST_GUARD
+#include <cstdio>
+#include <iostream>
+#include <string.h>
+
+using std::cout;
+using std::cerr;
+using std::endl;
+using std::hex;
+
+static const uint64_t kSeed0 = 1234567;
+static const uint64_t kSeed1 = k0;
+static const int kDataSize = 1 << 20;
+static const int kTestSize = 300;
+#define kSeed128 Uint128(kSeed0, kSeed1)
+
+static char data[kDataSize];
+
+static int completed_self_tests = 0;
+static int errors = 0;
+
+// Initialize data to pseudorandom values.
+void Setup() {
+ if (completed_self_tests == 0) {
+ uint64_t a = 9;
+ uint64_t b = 777;
+ for (int i = 0; i < kDataSize; i++) {
+ a += b;
+ b += a;
+ a = (a ^ (a >> 41)) * k0;
+ b = (b ^ (b >> 41)) * k0 + i;
+ uint8_t u = b >> 37;
+ memcpy(data + i, &u, 1); // uint8_t -> char
+ }
+ }
+}
+
+int NoteErrors() {
+#define NUM_SELF_TESTS 9
+ if (++completed_self_tests == NUM_SELF_TESTS)
+ std::exit(errors > 0);
+ return errors;
+}
+
+template <typename T> inline bool IsNonZero(T x) {
+ return x != 0;
+}
+
+template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
+ return x != Uint128(0, 0);
+}
+
+#endif // FARMHASH_SELF_TEST_GUARD
+
+namespace farmhashntTest {
+
+uint32_t CreateSeed(int offset, int salt) {
+ uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h += static_cast<uint32_t>(offset & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ return h;
+}
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+#define SEED CreateSeed(offset, -1)
+#define SEED0 CreateSeed(offset, 0)
+#define SEED1 CreateSeed(offset, 1)
+
+#undef TESTING
+#define TESTING 1
+#if TESTING
+uint32_t expected[] = {
+2681724312u,
+797982799u,
+921001710u,
+2134990486u,
+2244477846u,
+2992121793u,
+3943596029u,
+452431531u,
+2557197665u,
+2532580744u,
+3099673830u,
+3696623795u,
+3281581178u,
+1882212500u,
+275903667u,
+3033004529u,
+1402319660u,
+2699376854u,
+4222949502u,
+1712034059u,
+1330324210u,
+2921867846u,
+1728752234u,
+326029180u,
+3349570000u,
+1612122221u,
+1646032583u,
+1432476832u,
+3552092450u,
+1499109081u,
+1554038301u,
+3190844552u,
+540224401u,
+489963606u,
+1562872448u,
+2128624475u,
+1262831810u,
+1672724608u,
+2077310004u,
+1911523866u,
+294527927u,
+1389770549u,
+2026137563u,
+629449419u,
+2489287368u,
+645684964u,
+230403464u,
+3272648435u,
+165370827u,
+1230085527u,
+3628174014u,
+851743255u,
+1554380634u,
+3667013118u,
+2290487377u,
+1909203251u,
+1498556724u,
+4165088768u,
+197618179u,
+914413116u,
+1913303225u,
+3117299654u,
+1357272220u,
+507436733u,
+1413396341u,
+146044391u,
+429095991u,
+3056862311u,
+366414107u,
+2293458109u,
+1684583131u,
+1170404994u,
+520792961u,
+1577421232u,
+4033596884u,
+4229339322u,
+3242407770u,
+2649785113u,
+816692935u,
+3555213933u,
+517646945u,
+2180594090u,
+3047062993u,
+2391606125u,
+382936554u,
+788479970u,
+2826990641u,
+3167748333u,
+1758123094u,
+389974094u,
+3338548567u,
+2583576230u,
+3198590202u,
+4155628142u,
+542201663u,
+2856634168u,
+3948351189u,
+4194218315u,
+1467786451u,
+2743592929u,
+1062268187u,
+3810665822u,
+2560479831u,
+997658837u,
+3067277639u,
+1211737169u,
+59581167u,
+1389679610u,
+4189944477u,
+100876854u,
+2062343506u,
+3088828656u,
+3284356565u,
+3130054947u,
+3532596884u,
+3887208531u,
+259034107u,
+3233195759u,
+3200749877u,
+760633989u,
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+1516407838u,
+1778459926u,
+2146672889u,
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+862072556u,
+3745267835u,
+701920051u,
+581695350u,
+1410111809u,
+3326135446u,
+2187968410u,
+4267859263u,
+479241367u,
+2868987960u,
+704325635u,
+1418509533u,
+735688735u,
+3283299459u,
+813690332u,
+1439630796u,
+3195309868u,
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+1197100813u,
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+3329594980u,
+490608221u,
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+2008251381u,
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+3788056262u,
+3678660147u,
+2656772270u,
+1997584981u,
+2668998785u,
+2954162084u,
+845687881u,
+776018378u,
+2066910012u,
+918315064u,
+};
+
+// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
+bool Test(int offset, int len = 0) {
+#undef Check
+#undef IsAlive
+
+#define Check(x) do { \
+ const uint32_t actual = (x), e = expected[index++]; \
+ bool ok = actual == e; \
+ if (!ok) { \
+ cerr << "expected " << hex << e << " but got " << actual << endl; \
+ ++errors; \
+ } \
+ assert(ok); \
+} while (0)
+
+#define IsAlive(x) do { alive += IsNonZero(x); } while (0)
+
+ // After the following line is where the uses of "Check" and such will go.
+ static int index = 0;
+if (offset == -1) { int alive = 0; IsAlive(farmhashnt::Hash32WithSeed(data, len++, SEED)); IsAlive(farmhashnt::Hash32(data, len++)); IsAlive(farmhashnt::Hash32(data, len++)); len -= 3; return alive > 0; }
+Check(farmhashnt::Hash32WithSeed(data + offset, len, SEED));
+Check(farmhashnt::Hash32(data + offset, len));
+
+ return true;
+#undef Check
+#undef IsAlive
+}
+
+int RunTest() {
+ Setup();
+ int i = 0;
+ cout << "Running farmhashntTest";
+ if (!Test(-1)) {
+ cout << "... Unavailable\n";
+ return NoteErrors();
+ }
+ // Good. The function is attempting to hash, so run the full test.
+ int errors_prior_to_test = errors;
+ for ( ; i < kTestSize - 1; i++) {
+ Test(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ Test(0, i);
+ }
+ Test(0, kDataSize);
+ cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
+ return NoteErrors();
+}
+
+#else
+
+// After the following line is where the code to print hash codes will go.
+void Dump(int offset, int len) {
+cout << farmhashnt::Hash32WithSeed(data + offset, len, SEED) << "u," << endl;
+cout << farmhashnt::Hash32(data + offset, len) << "u," << endl;
+}
+
+#endif
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+
+} // namespace farmhashntTest
+
+#if !TESTING
+int main(int argc, char** argv) {
+ Setup();
+ cout << "uint32_t expected[] = {\n";
+ int i = 0;
+ for ( ; i < kTestSize - 1; i++) {
+ farmhashntTest::Dump(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ farmhashntTest::Dump(0, i);
+ }
+ farmhashntTest::Dump(0, kDataSize);
+ cout << "};\n";
+}
+#endif
+#ifndef FARMHASH_SELF_TEST_GUARD
+#define FARMHASH_SELF_TEST_GUARD
+#include <cstdio>
+#include <iostream>
+#include <string.h>
+
+using std::cout;
+using std::cerr;
+using std::endl;
+using std::hex;
+
+static const uint64_t kSeed0 = 1234567;
+static const uint64_t kSeed1 = k0;
+static const int kDataSize = 1 << 20;
+static const int kTestSize = 300;
+#define kSeed128 Uint128(kSeed0, kSeed1)
+
+static char data[kDataSize];
+
+static int completed_self_tests = 0;
+static int errors = 0;
+
+// Initialize data to pseudorandom values.
+void Setup() {
+ if (completed_self_tests == 0) {
+ uint64_t a = 9;
+ uint64_t b = 777;
+ for (int i = 0; i < kDataSize; i++) {
+ a += b;
+ b += a;
+ a = (a ^ (a >> 41)) * k0;
+ b = (b ^ (b >> 41)) * k0 + i;
+ uint8_t u = b >> 37;
+ memcpy(data + i, &u, 1); // uint8_t -> char
+ }
+ }
+}
+
+int NoteErrors() {
+#define NUM_SELF_TESTS 9
+ if (++completed_self_tests == NUM_SELF_TESTS)
+ std::exit(errors > 0);
+ return errors;
+}
+
+template <typename T> inline bool IsNonZero(T x) {
+ return x != 0;
+}
+
+template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
+ return x != Uint128(0, 0);
+}
+
+#endif // FARMHASH_SELF_TEST_GUARD
+
+namespace farmhashsaTest {
+
+uint32_t CreateSeed(int offset, int salt) {
+ uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h += static_cast<uint32_t>(offset & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ return h;
+}
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+#define SEED CreateSeed(offset, -1)
+#define SEED0 CreateSeed(offset, 0)
+#define SEED1 CreateSeed(offset, 1)
+
+#undef TESTING
+#define TESTING 1
+#if TESTING
+uint32_t expected[] = {
+4223616069u,
+3696677242u,
+4081014168u,
+2576519988u,
+2212771159u,
+1112731063u,
+1020067935u,
+3955445564u,
+1451961420u,
+653440099u,
+31917516u,
+2957164615u,
+2590087362u,
+3879448744u,
+176305566u,
+2447367541u,
+1359016305u,
+3363804638u,
+1117290165u,
+1062549743u,
+2437877004u,
+1894455839u,
+673206794u,
+3486923651u,
+3269862919u,
+2303349487u,
+1380660650u,
+595525107u,
+1525325287u,
+2025609358u,
+176408838u,
+1592885012u,
+864896482u,
+2101378090u,
+3489229104u,
+2118965695u,
+581644891u,
+2718789079u,
+631613207u,
+4228658372u,
+3867875546u,
+3531368319u,
+3804516756u,
+3317755099u,
+1619744564u,
+2884717286u,
+1088213445u,
+2667691076u,
+3727873235u,
+2330406762u,
+858590707u,
+123802208u,
+4150036245u,
+182283099u,
+1478882570u,
+3282617403u,
+819171187u,
+1172627392u,
+4254302102u,
+2957028020u,
+437030323u,
+2452147680u,
+2868246750u,
+3530169402u,
+3154852132u,
+215019192u,
+357580983u,
+1354454461u,
+1108813287u,
+2324008118u,
+2315997713u,
+4181601562u,
+1360882441u,
+92423273u,
+3048866755u,
+3369188505u,
+3664371439u,
+2920710428u,
+1027891570u,
+2653166430u,
+3461888315u,
+1475780447u,
+292769636u,
+1737473313u,
+4064110516u,
+4170160075u,
+762850927u,
+3630603695u,
+2803307356u,
+844987665u,
+460980967u,
+3005635467u,
+2802568977u,
+588668033u,
+2148940781u,
+3239099984u,
+1266953698u,
+3197808789u,
+3519942533u,
+2511995334u,
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+1515163433u,
+};
+
+// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
+bool Test(int offset, int len = 0) {
+#undef Check
+#undef IsAlive
+
+#define Check(x) do { \
+ const uint32_t actual = (x), e = expected[index++]; \
+ bool ok = actual == e; \
+ if (!ok) { \
+ cerr << "expected " << hex << e << " but got " << actual << endl; \
+ ++errors; \
+ } \
+ assert(ok); \
+} while (0)
+
+#define IsAlive(x) do { alive += IsNonZero(x); } while (0)
+
+ // After the following line is where the uses of "Check" and such will go.
+ static int index = 0;
+if (offset == -1) { int alive = 0; IsAlive(farmhashsa::Hash32WithSeed(data, len++, SEED)); IsAlive(farmhashsa::Hash32(data, len++)); IsAlive(farmhashsa::Hash32(data, len++)); len -= 3; return alive > 0; }
+Check(farmhashsa::Hash32WithSeed(data + offset, len, SEED));
+Check(farmhashsa::Hash32(data + offset, len));
+
+ return true;
+#undef Check
+#undef IsAlive
+}
+
+int RunTest() {
+ Setup();
+ int i = 0;
+ cout << "Running farmhashsaTest";
+ if (!Test(-1)) {
+ cout << "... Unavailable\n";
+ return NoteErrors();
+ }
+ // Good. The function is attempting to hash, so run the full test.
+ int errors_prior_to_test = errors;
+ for ( ; i < kTestSize - 1; i++) {
+ Test(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ Test(0, i);
+ }
+ Test(0, kDataSize);
+ cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
+ return NoteErrors();
+}
+
+#else
+
+// After the following line is where the code to print hash codes will go.
+void Dump(int offset, int len) {
+cout << farmhashsa::Hash32WithSeed(data + offset, len, SEED) << "u," << endl;
+cout << farmhashsa::Hash32(data + offset, len) << "u," << endl;
+}
+
+#endif
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+
+} // namespace farmhashsaTest
+
+#if !TESTING
+int main(int argc, char** argv) {
+ Setup();
+ cout << "uint32_t expected[] = {\n";
+ int i = 0;
+ for ( ; i < kTestSize - 1; i++) {
+ farmhashsaTest::Dump(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ farmhashsaTest::Dump(0, i);
+ }
+ farmhashsaTest::Dump(0, kDataSize);
+ cout << "};\n";
+}
+#endif
+#ifndef FARMHASH_SELF_TEST_GUARD
+#define FARMHASH_SELF_TEST_GUARD
+#include <cstdio>
+#include <iostream>
+#include <string.h>
+
+using std::cout;
+using std::cerr;
+using std::endl;
+using std::hex;
+
+static const uint64_t kSeed0 = 1234567;
+static const uint64_t kSeed1 = k0;
+static const int kDataSize = 1 << 20;
+static const int kTestSize = 300;
+#define kSeed128 Uint128(kSeed0, kSeed1)
+
+static char data[kDataSize];
+
+static int completed_self_tests = 0;
+static int errors = 0;
+
+// Initialize data to pseudorandom values.
+void Setup() {
+ if (completed_self_tests == 0) {
+ uint64_t a = 9;
+ uint64_t b = 777;
+ for (int i = 0; i < kDataSize; i++) {
+ a += b;
+ b += a;
+ a = (a ^ (a >> 41)) * k0;
+ b = (b ^ (b >> 41)) * k0 + i;
+ uint8_t u = b >> 37;
+ memcpy(data + i, &u, 1); // uint8_t -> char
+ }
+ }
+}
+
+int NoteErrors() {
+#define NUM_SELF_TESTS 9
+ if (++completed_self_tests == NUM_SELF_TESTS)
+ std::exit(errors > 0);
+ return errors;
+}
+
+template <typename T> inline bool IsNonZero(T x) {
+ return x != 0;
+}
+
+template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
+ return x != Uint128(0, 0);
+}
+
+#endif // FARMHASH_SELF_TEST_GUARD
+
+namespace farmhashsuTest {
+
+uint32_t CreateSeed(int offset, int salt) {
+ uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h += static_cast<uint32_t>(offset & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ return h;
+}
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+#define SEED CreateSeed(offset, -1)
+#define SEED0 CreateSeed(offset, 0)
+#define SEED1 CreateSeed(offset, 1)
+
+#undef TESTING
+#define TESTING 1
+#if TESTING
+uint32_t expected[] = {
+4223616069u,
+3696677242u,
+4081014168u,
+2576519988u,
+2212771159u,
+1112731063u,
+1020067935u,
+3955445564u,
+1451961420u,
+653440099u,
+31917516u,
+2957164615u,
+2590087362u,
+3879448744u,
+176305566u,
+2447367541u,
+1359016305u,
+3363804638u,
+1117290165u,
+1062549743u,
+2437877004u,
+1894455839u,
+673206794u,
+3486923651u,
+3269862919u,
+2303349487u,
+1380660650u,
+595525107u,
+1525325287u,
+2025609358u,
+176408838u,
+1592885012u,
+864896482u,
+2101378090u,
+3489229104u,
+2118965695u,
+581644891u,
+2718789079u,
+631613207u,
+4228658372u,
+3867875546u,
+3531368319u,
+3804516756u,
+3317755099u,
+1619744564u,
+2884717286u,
+1088213445u,
+2667691076u,
+3727873235u,
+2330406762u,
+858590707u,
+457744844u,
+4150036245u,
+2000404290u,
+1478882570u,
+901678172u,
+819171187u,
+195942998u,
+4254302102u,
+3967266927u,
+437030323u,
+4018009204u,
+2868246750u,
+3540087514u,
+3154852132u,
+3319116625u,
+357580983u,
+3177665294u,
+1108813287u,
+1253366798u,
+2315997713u,
+510718750u,
+1360882441u,
+2770216279u,
+3048866755u,
+3406961221u,
+3664371439u,
+1151145514u,
+1027891570u,
+2699067992u,
+3461888315u,
+198061905u,
+292769636u,
+1106771795u,
+4064110516u,
+3258279756u,
+762850927u,
+1818699721u,
+2803307356u,
+3919169404u,
+460980967u,
+3125535078u,
+2802568977u,
+3582546426u,
+2148940781u,
+3963274378u,
+1266953698u,
+204185123u,
+1100034381u,
+3009193601u,
+4200651967u,
+274889605u,
+2700589508u,
+952511689u,
+3765324859u,
+3465498478u,
+4014967037u,
+2070988082u,
+2972423530u,
+3068638223u,
+4156773651u,
+489509804u,
+1323863238u,
+3731914806u,
+2846098469u,
+2728930632u,
+346814072u,
+848146907u,
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+4165126521u,
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+4179859388u,
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+4142733597u,
+1953448206u,
+4199329278u,
+865077060u,
+2627662116u,
+2802499360u,
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+1959218197u,
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+702138030u,
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+3700108015u,
+1932843667u,
+2677701670u,
+6041177u,
+3889648557u,
+1461025478u,
+};
+
+// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
+bool Test(int offset, int len = 0) {
+#undef Check
+#undef IsAlive
+
+#define Check(x) do { \
+ const uint32_t actual = (x), e = expected[index++]; \
+ bool ok = actual == e; \
+ if (!ok) { \
+ cerr << "expected " << hex << e << " but got " << actual << endl; \
+ ++errors; \
+ } \
+ assert(ok); \
+} while (0)
+
+#define IsAlive(x) do { alive += IsNonZero(x); } while (0)
+
+ // After the following line is where the uses of "Check" and such will go.
+ static int index = 0;
+if (offset == -1) { int alive = 0; IsAlive(farmhashsu::Hash32WithSeed(data, len++, SEED)); IsAlive(farmhashsu::Hash32(data, len++)); IsAlive(farmhashsu::Hash32(data, len++)); len -= 3; return alive > 0; }
+Check(farmhashsu::Hash32WithSeed(data + offset, len, SEED));
+Check(farmhashsu::Hash32(data + offset, len));
+
+ return true;
+#undef Check
+#undef IsAlive
+}
+
+int RunTest() {
+ Setup();
+ int i = 0;
+ cout << "Running farmhashsuTest";
+ if (!Test(-1)) {
+ cout << "... Unavailable\n";
+ return NoteErrors();
+ }
+ // Good. The function is attempting to hash, so run the full test.
+ int errors_prior_to_test = errors;
+ for ( ; i < kTestSize - 1; i++) {
+ Test(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ Test(0, i);
+ }
+ Test(0, kDataSize);
+ cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
+ return NoteErrors();
+}
+
+#else
+
+// After the following line is where the code to print hash codes will go.
+void Dump(int offset, int len) {
+cout << farmhashsu::Hash32WithSeed(data + offset, len, SEED) << "u," << endl;
+cout << farmhashsu::Hash32(data + offset, len) << "u," << endl;
+}
+
+#endif
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+
+} // namespace farmhashsuTest
+
+#if !TESTING
+int main(int argc, char** argv) {
+ Setup();
+ cout << "uint32_t expected[] = {\n";
+ int i = 0;
+ for ( ; i < kTestSize - 1; i++) {
+ farmhashsuTest::Dump(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ farmhashsuTest::Dump(0, i);
+ }
+ farmhashsuTest::Dump(0, kDataSize);
+ cout << "};\n";
+}
+#endif
+#ifndef FARMHASH_SELF_TEST_GUARD
+#define FARMHASH_SELF_TEST_GUARD
+#include <cstdio>
+#include <iostream>
+#include <string.h>
+
+using std::cout;
+using std::cerr;
+using std::endl;
+using std::hex;
+
+static const uint64_t kSeed0 = 1234567;
+static const uint64_t kSeed1 = k0;
+static const int kDataSize = 1 << 20;
+static const int kTestSize = 300;
+#define kSeed128 Uint128(kSeed0, kSeed1)
+
+static char data[kDataSize];
+
+static int completed_self_tests = 0;
+static int errors = 0;
+
+// Initialize data to pseudorandom values.
+void Setup() {
+ if (completed_self_tests == 0) {
+ uint64_t a = 9;
+ uint64_t b = 777;
+ for (int i = 0; i < kDataSize; i++) {
+ a += b;
+ b += a;
+ a = (a ^ (a >> 41)) * k0;
+ b = (b ^ (b >> 41)) * k0 + i;
+ uint8_t u = b >> 37;
+ memcpy(data + i, &u, 1); // uint8_t -> char
+ }
+ }
+}
+
+int NoteErrors() {
+#define NUM_SELF_TESTS 9
+ if (++completed_self_tests == NUM_SELF_TESTS)
+ std::exit(errors > 0);
+ return errors;
+}
+
+template <typename T> inline bool IsNonZero(T x) {
+ return x != 0;
+}
+
+template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
+ return x != Uint128(0, 0);
+}
+
+#endif // FARMHASH_SELF_TEST_GUARD
+
+namespace farmhashteTest {
+
+uint32_t CreateSeed(int offset, int salt) {
+ uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h += static_cast<uint32_t>(offset & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ return h;
+}
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+#define SEED CreateSeed(offset, -1)
+#define SEED0 CreateSeed(offset, 0)
+#define SEED1 CreateSeed(offset, 1)
+
+#undef TESTING
+#define TESTING 1
+#if TESTING
+uint32_t expected[] = {
+1140953930u, 861465670u,
+3277735313u, 2681724312u,
+2598464059u, 797982799u,
+890626835u, 800175912u,
+2603993599u, 921001710u,
+1410420968u, 2134990486u,
+3283896453u, 1867689945u,
+2914424215u, 2244477846u,
+255297188u, 2992121793u,
+1110588164u, 4186314283u,
+161451183u, 3943596029u,
+4019337850u, 452431531u,
+283198166u, 2741341286u,
+3379021470u, 2557197665u,
+299850021u, 2532580744u,
+452473466u, 1706958772u,
+1298374911u, 3099673830u,
+2199864459u, 3696623795u,
+236935126u, 2976578695u,
+4055299123u, 3281581178u,
+1053458494u, 1882212500u,
+2305012065u, 2169731866u,
+3456121707u, 275903667u,
+458884671u, 3033004529u,
+3058973506u, 2379411653u,
+1898235244u, 1402319660u,
+2700149065u, 2699376854u,
+147814787u, 720739346u,
+2433714046u, 4222949502u,
+4220361840u, 1712034059u,
+3425469811u, 3690733394u,
+4148372108u, 1330324210u,
+594028478u, 2921867846u,
+1635026870u, 192883107u,
+780716741u, 1728752234u,
+3280331829u, 326029180u,
+3969463346u, 1436364519u,
+393215742u, 3349570000u,
+3824583307u, 1612122221u,
+2859809759u, 3808705738u,
+1379537552u, 1646032583u,
+2233466664u, 1432476832u,
+4023053163u, 2650381482u,
+2052294713u, 3552092450u,
+1628777059u, 1499109081u,
+3476440786u, 3829307897u,
+2960536756u, 1554038301u,
+1145519619u, 3190844552u,
+2902102606u, 3600725550u,
+237495366u, 540224401u,
+65721842u, 489963606u,
+1448662590u, 397635823u,
+1596489240u, 1562872448u,
+1790705123u, 2128624475u,
+180854224u, 2604346966u,
+1435705557u, 1262831810u,
+155445229u, 1672724608u,
+1669465176u, 1341975128u,
+663607706u, 2077310004u,
+3610042449u, 1911523866u,
+1043692997u, 1454396064u,
+2563776023u, 294527927u,
+1099072299u, 1389770549u,
+703505868u, 678706990u,
+2952353448u, 2026137563u,
+3603803785u, 629449419u,
+1933894405u, 3043213226u,
+226132789u, 2489287368u,
+1552847036u, 645684964u,
+3828089804u, 3632594520u,
+187883449u, 230403464u,
+3151491850u, 3272648435u,
+3729087873u, 1303930448u,
+2002861219u, 165370827u,
+916494250u, 1230085527u,
+3103338579u, 3064290191u,
+3807265751u, 3628174014u,
+231181488u, 851743255u,
+2295806711u, 1781190011u,
+2988893883u, 1554380634u,
+1142264800u, 3667013118u,
+1968445277u, 315203929u,
+2638023604u, 2290487377u,
+732137533u, 1909203251u,
+440398219u, 1891630171u,
+1380301172u, 1498556724u,
+4072067757u, 4165088768u,
+4204318635u, 441430649u,
+3931792696u, 197618179u,
+956300927u, 914413116u,
+3010839769u, 2837339569u,
+2148126371u, 1913303225u,
+3074915312u, 3117299654u,
+4139181436u, 2993479124u,
+3178848746u, 1357272220u,
+1438494951u, 507436733u,
+667183474u, 2084369203u,
+3854939912u, 1413396341u,
+126024219u, 146044391u,
+1016656857u, 3022024459u,
+3254014218u, 429095991u,
+990500595u, 3056862311u,
+985653208u, 1718653828u,
+623071693u, 366414107u,
+1771289760u, 2293458109u,
+3047342438u, 2991127487u,
+3120876698u, 1684583131u,
+3638043310u, 1170404994u,
+863214540u, 1087193030u,
+199124911u, 520792961u,
+3169775996u, 1577421232u,
+3331828431u, 1013201099u,
+1716848157u, 4033596884u,
+1770708857u, 4229339322u,
+1146169032u, 1434258493u,
+3824360466u, 3242407770u,
+1926419493u, 2649785113u,
+872586426u, 762243036u,
+2736953692u, 816692935u,
+1571283333u, 3555213933u,
+2266795890u, 3781899767u,
+4290630595u, 517646945u,
+3006163611u, 2180594090u,
+959214578u, 558910384u,
+1283799121u, 3047062993u,
+3830962609u, 2391606125u,
+3544509313u, 622325861u,
+834785312u, 382936554u,
+1421463872u, 788479970u,
+1825135056u, 2725923798u,
+580988377u, 2826990641u,
+247825043u, 3167748333u,
+812546227u, 2506885666u,
+2584372201u, 1758123094u,
+1891789696u, 389974094u,
+345313518u, 2022370576u,
+3886113119u, 3338548567u,
+1083486947u, 2583576230u,
+1776047957u, 1771384107u,
+3604937815u, 3198590202u,
+3027522813u, 4155628142u,
+4232136669u, 427759438u,
+4244322689u, 542201663u,
+1549591985u, 2856634168u,
+556609672u, 45845311u,
+1175961330u, 3948351189u,
+4165739882u, 4194218315u,
+1634635545u, 4151937410u,
+713127376u, 1467786451u,
+1327394015u, 2743592929u,
+2638154051u, 810082938u,
+3077742128u, 1062268187u,
+4084325664u, 3810665822u,
+3735739145u, 2794294783u,
+2335576331u, 2560479831u,
+690240711u, 997658837u,
+2442302747u, 3948961926u,
+3958366652u, 3067277639u,
+2059157774u, 1211737169u,
+1516711748u, 2339636583u,
+4188504038u, 59581167u,
+2767897792u, 1389679610u,
+2658147000u, 2643979752u,
+3758739543u, 4189944477u,
+1454470782u, 100876854u,
+2995362413u, 118817200u,
+3252925478u, 2062343506u,
+2804483644u, 3088828656u,
+1231633714u, 4168280671u,
+2931588131u, 3284356565u,
+1255909792u, 3130054947u,
+4173605289u, 1407328702u,
+1677744031u, 3532596884u,
+3162657845u, 3887208531u,
+2256541290u, 3459463480u,
+3740979556u, 259034107u,
+392987633u, 3233195759u,
+3606709555u, 3424793077u,
+315836068u, 3200749877u,
+4065431359u, 760633989u,
+2982018998u, 1811050648u,
+234531934u, 1115203611u,
+3897494162u, 1516407838u,
+1603559457u, 323296368u,
+2632963283u, 1778459926u,
+2879836826u, 2146672889u,
+3486330348u, 492621815u,
+1231665285u, 2457048126u,
+3438440082u, 2217471853u,
+3355404249u, 3275550588u,
+1052645068u, 862072556u,
+4110617119u, 3745267835u,
+2657392572u, 4279236653u,
+1688445808u, 701920051u,
+956734128u, 581695350u,
+3157862788u, 2585726058u,
+1192588249u, 1410111809u,
+1651193125u, 3326135446u,
+1073280453u, 97376972u,
+2513844237u, 2187968410u,
+3976859649u, 4267859263u,
+3429034542u, 564493077u,
+3000537321u, 479241367u,
+3845637831u, 2868987960u,
+51544337u, 1029173765u,
+393624922u, 704325635u,
+2357610553u, 1418509533u,
+2007814586u, 3866658271u,
+3082385053u, 735688735u,
+916110004u, 3283299459u,
+1051684175u, 1083796807u,
+4074716319u, 813690332u,
+144264390u, 1439630796u,
+1508556987u, 675582689u,
+3748881891u, 3195309868u,
+362884708u, 1616408198u,
+43233176u, 837301135u,
+881504822u, 3254795114u,
+1385506591u, 2799925823u,
+1469874582u, 3464841997u,
+497175391u, 3929484338u,
+3975771289u, 1798536177u,
+2926265846u, 1374242438u,
+3675707838u, 4205965408u,
+3153165629u, 1499475160u,
+187287713u, 548490821u,
+3255259608u, 4247675634u,
+1940181471u, 3779953975u,
+687167150u, 2319566715u,
+1742785722u, 785893184u,
+2296977392u, 2778575413u,
+1794720651u, 48131484u,
+4084891412u, 1160134629u,
+3737623280u, 823113169u,
+3423207646u, 3803213486u,
+710625654u, 4116162021u,
+3693420287u, 4167766971u,
+1666602807u, 295320990u,
+3513255468u, 2487440590u,
+234080704u, 4004655503u,
+2971762528u, 1479656873u,
+4090178629u, 4044418876u,
+391947536u, 1462554406u,
+3909295855u, 1239580330u,
+1515601363u, 2011102035u,
+1442068334u, 4265993528u,
+1191921695u, 2291355695u,
+4257172787u, 576405853u,
+314332944u, 4038839101u,
+55559918u, 2378985842u,
+711098718u, 2425317635u,
+1644327317u, 1401013391u,
+4193760037u, 2958260436u,
+3167371443u, 3062418115u,
+3800755475u, 3167030094u,
+3489648204u, 1405430357u,
+526177822u, 2602636307u,
+915406019u, 4264167741u,
+1484090483u, 3070944737u,
+254529415u, 4017058800u,
+1702710265u, 1029665228u,
+2000382906u, 3185573940u,
+1381258384u, 4036354071u,
+2900841028u, 2670703363u,
+2921748807u, 2899069938u,
+4130543625u, 688472265u,
+4186808827u, 1054670286u,
+1132985391u, 2840525968u,
+4175776103u, 338058159u,
+1735964501u, 1539305024u,
+3497121710u, 1568260669u,
+2227290760u, 146827036u,
+3977176001u, 4060134777u,
+857488494u, 250055052u,
+4284109679u, 2502815838u,
+2592281721u, 1603444633u,
+1390562014u, 1556658131u,
+616327404u, 2448966429u,
+3051191726u, 3891353218u,
+1213304082u, 762328245u,
+2239052397u, 1082330589u,
+2455957292u, 201837927u,
+405397452u, 3079886794u,
+2583939798u, 2848283092u,
+3750724631u, 883849006u,
+3204198988u, 3341327098u,
+1855234968u, 1982110346u,
+1485529487u, 541496720u,
+4117290321u, 3607433551u,
+2168864636u, 133643215u,
+1055817409u, 3847827123u,
+2960769387u, 4046101649u,
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+517111221u, 1796672358u,
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+444722813u, 3580039116u,
+2355675635u, 663735032u,
+3247800169u, 1579404983u,
+1985115003u, 3397891494u,
+358696453u, 1474896279u,
+516388613u, 710590371u,
+3490497111u, 2514565805u,
+2386143445u, 477509654u,
+412854590u, 3624609754u,
+3214388668u, 3516075816u,
+2731288520u, 1369482895u,
+4033204378u, 1314000850u,
+829769325u, 1935166880u,
+1608191643u, 2607067237u,
+423820371u, 3257747610u,
+1355298041u, 3776931214u,
+4105054901u, 2107080812u,
+1911521879u, 3183054185u,
+3910177801u, 675129307u,
+1209358971u, 4205727791u,
+1435726287u, 3333261712u,
+1400982708u, 1154611403u,
+1663501483u, 2837596667u,
+3164734053u, 2759854023u,
+4012043629u, 1963228038u,
+3981675284u, 2677557877u,
+520119591u, 505138315u,
+897271356u, 1803966773u,
+1016663294u, 616691903u,
+2254742522u, 4032705384u,
+2468470796u, 798395739u,
+3025169002u, 3570037122u,
+1461093710u, 3473799845u,
+3702624858u, 476400898u,
+1043039728u, 2304070437u,
+181576948u, 602972493u,
+3996616030u, 3289878097u,
+2068516226u, 3922247304u,
+1299968266u, 2520311409u,
+1968824721u, 3214794876u,
+1581813122u, 2668800905u,
+3297613974u, 748160407u,
+1145536484u, 1326769504u,
+2973323521u, 3775262814u,
+3218653169u, 902775872u,
+3498603433u, 1372805534u,
+704686363u, 3626542352u,
+2271580579u, 1213925114u,
+46329775u, 3009384989u,
+1330254048u, 1194824134u,
+514204310u, 3781981134u,
+442526164u, 2835608783u,
+3460471867u, 510634034u,
+546406434u, 2716786748u,
+2840500021u, 1669490957u,
+2536189149u, 3251421224u,
+1358736072u, 1089334066u,
+3260749330u, 250756920u,
+2974806681u, 1513718866u,
+82635635u, 4041016629u,
+3391765744u, 2495807367u,
+3962674316u, 2822889695u,
+753413337u, 2008251381u,
+3123390177u, 106212622u,
+490570565u, 1684884205u,
+793892547u, 1927268995u,
+2344148164u, 2251978818u,
+437424236u, 2774023200u,
+2674940754u, 3788056262u,
+2597882666u, 3678660147u,
+3797434193u, 3838215866u,
+279687080u, 2656772270u,
+2190204787u, 1997584981u,
+3384401882u, 3160208845u,
+3629379425u, 2668998785u,
+1050036757u, 2954162084u,
+917091826u, 1744374041u,
+1454282570u, 845687881u,
+2997173625u, 776018378u,
+1137560602u, 1938378389u,
+1748082354u, 2066910012u,
+2677675207u, 918315064u,
+};
+
+// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
+bool Test(int offset, int len = 0) {
+#undef Check
+#undef IsAlive
+
+#define Check(x) do { \
+ const uint32_t actual = (x), e = expected[index++]; \
+ bool ok = actual == e; \
+ if (!ok) { \
+ cerr << "expected " << hex << e << " but got " << actual << endl; \
+ ++errors; \
+ } \
+ assert(ok); \
+} while (0)
+
+#define IsAlive(x) do { alive += IsNonZero(x); } while (0)
+
+ // After the following line is where the uses of "Check" and such will go.
+ static int index = 0;
+if (offset == -1) { int alive = 0; { uint64_t h = farmhashte::Hash64WithSeeds(data, len++, SEED0, SEED1); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } { uint64_t h = farmhashte::Hash64WithSeed(data, len++, SEED); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } { uint64_t h = farmhashte::Hash64(data, len++); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } len -= 3; return alive > 0; }
+{ uint64_t h = farmhashte::Hash64WithSeeds(data + offset, len, SEED0, SEED1); Check(h >> 32); Check((h << 32) >> 32); }
+{ uint64_t h = farmhashte::Hash64WithSeed(data + offset, len, SEED); Check(h >> 32); Check((h << 32) >> 32); }
+{ uint64_t h = farmhashte::Hash64(data + offset, len); Check(h >> 32); Check((h << 32) >> 32); }
+
+ return true;
+#undef Check
+#undef IsAlive
+}
+
+int RunTest() {
+ Setup();
+ int i = 0;
+ cout << "Running farmhashteTest";
+ if (!Test(-1)) {
+ cout << "... Unavailable\n";
+ return NoteErrors();
+ }
+ // Good. The function is attempting to hash, so run the full test.
+ int errors_prior_to_test = errors;
+ for ( ; i < kTestSize - 1; i++) {
+ Test(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ Test(0, i);
+ }
+ Test(0, kDataSize);
+ cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
+ return NoteErrors();
+}
+
+#else
+
+// After the following line is where the code to print hash codes will go.
+void Dump(int offset, int len) {
+{ uint64_t h = farmhashte::Hash64WithSeeds(data + offset, len, SEED0, SEED1); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+{ uint64_t h = farmhashte::Hash64WithSeed(data + offset, len, SEED); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+{ uint64_t h = farmhashte::Hash64(data + offset, len); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+}
+
+#endif
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+
+} // namespace farmhashteTest
+
+#if !TESTING
+int main(int argc, char** argv) {
+ Setup();
+ cout << "uint32_t expected[] = {\n";
+ int i = 0;
+ for ( ; i < kTestSize - 1; i++) {
+ farmhashteTest::Dump(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ farmhashteTest::Dump(0, i);
+ }
+ farmhashteTest::Dump(0, kDataSize);
+ cout << "};\n";
+}
+#endif
+#ifndef FARMHASH_SELF_TEST_GUARD
+#define FARMHASH_SELF_TEST_GUARD
+#include <cstdio>
+#include <iostream>
+#include <string.h>
+
+using std::cout;
+using std::cerr;
+using std::endl;
+using std::hex;
+
+static const uint64_t kSeed0 = 1234567;
+static const uint64_t kSeed1 = k0;
+static const int kDataSize = 1 << 20;
+static const int kTestSize = 300;
+#define kSeed128 Uint128(kSeed0, kSeed1)
+
+static char data[kDataSize];
+
+static int completed_self_tests = 0;
+static int errors = 0;
+
+// Initialize data to pseudorandom values.
+void Setup() {
+ if (completed_self_tests == 0) {
+ uint64_t a = 9;
+ uint64_t b = 777;
+ for (int i = 0; i < kDataSize; i++) {
+ a += b;
+ b += a;
+ a = (a ^ (a >> 41)) * k0;
+ b = (b ^ (b >> 41)) * k0 + i;
+ uint8_t u = b >> 37;
+ memcpy(data + i, &u, 1); // uint8_t -> char
+ }
+ }
+}
+
+int NoteErrors() {
+#define NUM_SELF_TESTS 9
+ if (++completed_self_tests == NUM_SELF_TESTS)
+ std::exit(errors > 0);
+ return errors;
+}
+
+template <typename T> inline bool IsNonZero(T x) {
+ return x != 0;
+}
+
+template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
+ return x != Uint128(0, 0);
+}
+
+#endif // FARMHASH_SELF_TEST_GUARD
+
+namespace farmhashuoTest {
+
+uint32_t CreateSeed(int offset, int salt) {
+ uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h += static_cast<uint32_t>(offset & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ return h;
+}
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+#define SEED CreateSeed(offset, -1)
+#define SEED0 CreateSeed(offset, 0)
+#define SEED1 CreateSeed(offset, 1)
+
+#undef TESTING
+#define TESTING 1
+#if TESTING
+uint32_t expected[] = {
+3277735313u, 2681724312u,
+2598464059u, 797982799u,
+2603993599u, 921001710u,
+1410420968u, 2134990486u,
+2914424215u, 2244477846u,
+255297188u, 2992121793u,
+161451183u, 3943596029u,
+4019337850u, 452431531u,
+3379021470u, 2557197665u,
+299850021u, 2532580744u,
+1298374911u, 3099673830u,
+2199864459u, 3696623795u,
+4055299123u, 3281581178u,
+1053458494u, 1882212500u,
+3456121707u, 275903667u,
+458884671u, 3033004529u,
+1898235244u, 1402319660u,
+2700149065u, 2699376854u,
+2433714046u, 4222949502u,
+4220361840u, 1712034059u,
+4148372108u, 1330324210u,
+594028478u, 2921867846u,
+780716741u, 1728752234u,
+3280331829u, 326029180u,
+393215742u, 3349570000u,
+3824583307u, 1612122221u,
+1379537552u, 1646032583u,
+2233466664u, 1432476832u,
+2052294713u, 3552092450u,
+1628777059u, 1499109081u,
+2960536756u, 1554038301u,
+1145519619u, 3190844552u,
+237495366u, 540224401u,
+65721842u, 489963606u,
+1596489240u, 1562872448u,
+1790705123u, 2128624475u,
+1435705557u, 1262831810u,
+155445229u, 1672724608u,
+663607706u, 2077310004u,
+3610042449u, 1911523866u,
+2563776023u, 294527927u,
+1099072299u, 1389770549u,
+2952353448u, 2026137563u,
+3603803785u, 629449419u,
+226132789u, 2489287368u,
+1552847036u, 645684964u,
+187883449u, 230403464u,
+3151491850u, 3272648435u,
+2002861219u, 165370827u,
+916494250u, 1230085527u,
+3807265751u, 3628174014u,
+231181488u, 851743255u,
+2988893883u, 1554380634u,
+1142264800u, 3667013118u,
+2638023604u, 2290487377u,
+732137533u, 1909203251u,
+1380301172u, 1498556724u,
+4072067757u, 4165088768u,
+3931792696u, 197618179u,
+956300927u, 914413116u,
+2148126371u, 1913303225u,
+3074915312u, 3117299654u,
+3178848746u, 1357272220u,
+1438494951u, 507436733u,
+3854939912u, 1413396341u,
+126024219u, 146044391u,
+3254014218u, 429095991u,
+165589978u, 1578546616u,
+623071693u, 366414107u,
+249776086u, 1207522198u,
+3120876698u, 1684583131u,
+46987739u, 1157614300u,
+199124911u, 520792961u,
+3614377032u, 586863115u,
+1716848157u, 4033596884u,
+1164298657u, 4140791139u,
+3824360466u, 3242407770u,
+3725511003u, 232064808u,
+2736953692u, 816692935u,
+512845449u, 3748861010u,
+4290630595u, 517646945u,
+22638523u, 648000590u,
+1283799121u, 3047062993u,
+1024246061u, 4027776454u,
+834785312u, 382936554u,
+411505255u, 1973395102u,
+580988377u, 2826990641u,
+3474970689u, 1029055034u,
+2584372201u, 1758123094u,
+589567754u, 325737734u,
+3886113119u, 3338548567u,
+257578986u, 3698087965u,
+3604937815u, 3198590202u,
+2305332220u, 191910725u,
+4244322689u, 542201663u,
+3315355162u, 2135941665u,
+1175961330u, 3948351189u,
+23075771u, 3252374102u,
+713127376u, 1467786451u,
+663013031u, 3444053918u,
+3077742128u, 1062268187u,
+2115441882u, 4081398201u,
+2335576331u, 2560479831u,
+1379288194u, 4225182569u,
+3958366652u, 3067277639u,
+3667516477u, 1709989541u,
+4188504038u, 59581167u,
+2725013602u, 3639843023u,
+3758739543u, 4189944477u,
+2470483982u, 877580602u,
+3252925478u, 2062343506u,
+3981838403u, 3762572073u,
+2931588131u, 3284356565u,
+1129162571u, 732225574u,
+1677744031u, 3532596884u,
+3232041815u, 1652884780u,
+3740979556u, 259034107u,
+2227121257u, 1426140634u,
+315836068u, 3200749877u,
+1386256573u, 24035717u,
+234531934u, 1115203611u,
+1598686658u, 3146815575u,
+2632963283u, 1778459926u,
+739944537u, 579625482u,
+1231665285u, 2457048126u,
+3903349120u, 389846205u,
+1052645068u, 862072556u,
+2834153464u, 1481069623u,
+1688445808u, 701920051u,
+3740748788u, 3388062747u,
+1192588249u, 1410111809u,
+2633463887u, 4050419847u,
+2513844237u, 2187968410u,
+2951683019u, 3015806005u,
+3000537321u, 479241367u,
+252167538u, 1231057113u,
+393624922u, 704325635u,
+1467197045u, 2066433573u,
+3082385053u, 735688735u,
+956434529u, 4028590195u,
+4074716319u, 813690332u,
+2124740535u, 804073145u,
+3748881891u, 3195309868u,
+841856605u, 2585865274u,
+881504822u, 3254795114u,
+1241815736u, 970796142u,
+497175391u, 3929484338u,
+4264993211u, 1835322201u,
+3675707838u, 4205965408u,
+300298607u, 3858319990u,
+3255259608u, 4247675634u,
+1095823272u, 1197245408u,
+1742785722u, 785893184u,
+1702965674u, 850401405u,
+4084891412u, 1160134629u,
+2555998391u, 1972759056u,
+710625654u, 4116162021u,
+3352753742u, 85121177u,
+3513255468u, 2487440590u,
+2480032715u, 2287747045u,
+4090178629u, 4044418876u,
+1703944517u, 486290428u,
+1515601363u, 2011102035u,
+573985957u, 3536053779u,
+4257172787u, 576405853u,
+1523550693u, 1014952061u,
+711098718u, 2425317635u,
+3460807169u, 3688987163u,
+3167371443u, 3062418115u,
+3330028292u, 1713171303u,
+526177822u, 2602636307u,
+1245357025u, 3346699703u,
+254529415u, 4017058800u,
+1829738451u, 2164236533u,
+1381258384u, 4036354071u,
+1749181924u, 4118435443u,
+4130543625u, 688472265u,
+2731071299u, 2547657502u,
+4175776103u, 338058159u,
+3729582129u, 4181845558u,
+2227290760u, 146827036u,
+2459178427u, 1025353883u,
+4284109679u, 2502815838u,
+825124804u, 2533140036u,
+616327404u, 2448966429u,
+413992636u, 2334782461u,
+2239052397u, 1082330589u,
+3381164715u, 199381437u,
+2583939798u, 2848283092u,
+2300168091u, 2156336315u,
+1855234968u, 1982110346u,
+2482046810u, 3158163887u,
+2168864636u, 133643215u,
+3904021624u, 3646514568u,
+1176127003u, 4015671361u,
+100525019u, 3534706803u,
+2045051700u, 3452457457u,
+1492267772u, 2308393828u,
+3776661467u, 3281002516u,
+4246334524u, 743955039u,
+685631442u, 1147951686u,
+2040912376u, 2911148054u,
+3204999386u, 2415262714u,
+313209105u, 777065474u,
+2729416454u, 1029284767u,
+1632078298u, 1817552554u,
+3963877000u, 1919171906u,
+3843219958u, 3073580867u,
+865146997u, 2473524405u,
+2593817617u, 3643076308u,
+617975720u, 3671562289u,
+121812599u, 2902367378u,
+2260041112u, 1019936943u,
+320945955u, 2337845588u,
+1535670711u, 773792826u,
+3152195900u, 4090794518u,
+4142587430u, 484732447u,
+419191319u, 3377973345u,
+324924679u, 2809286837u,
+1562277603u, 1378362199u,
+3791551981u, 1097806406u,
+1386297408u, 2304900033u,
+3574135531u, 4017075736u,
+1161238398u, 1358056883u,
+3487080616u, 1516736273u,
+851615042u, 2927899494u,
+4077452507u, 2984955003u,
+3907754394u, 3578173844u,
+1948409509u, 1923531348u,
+3578472493u, 3710074193u,
+213811117u, 2586632018u,
+1922589216u, 274958014u,
+1654276320u, 2687561076u,
+2569061755u, 3122046057u,
+3203802620u, 1692079268u,
+477806878u, 140587742u,
+520565830u, 3674576684u,
+91246882u, 1010215946u,
+3703994407u, 69201295u,
+776213083u, 3677771507u,
+3696902571u, 3593730713u,
+2907901228u, 3239753796u,
+1586241476u, 1939595371u,
+2268396558u, 3468719670u,
+2955715987u, 2295501078u,
+2775848696u, 1358532390u,
+3843660102u, 82177963u,
+4094477877u, 191727221u,
+278661677u, 2889101923u,
+1352525614u, 2844977667u,
+1261140657u, 1747052377u,
+2334120653u, 645125282u,
+2707230761u, 4142246789u,
+1068639717u, 2288162940u,
+1419293714u, 1636932722u,
+3252686293u, 318543902u,
+2598802768u, 2025886508u,
+2250788464u, 2711763065u,
+255108733u, 1845587644u,
+3719270134u, 3940707863u,
+917608574u, 1363253259u,
+788659330u, 673256220u,
+109793386u, 341851980u,
+2698465479u, 3011229884u,
+3886713057u, 1276595523u,
+2439962760u, 2700515456u,
+205970448u, 4198897105u,
+875511891u, 371715572u,
+1033680610u, 4278599955u,
+3120038721u, 1256300069u,
+225629455u, 3735275001u,
+3961944123u, 1769389163u,
+1074553219u, 668829411u,
+1098679359u, 2573697509u,
+1885071395u, 4233785523u,
+2513878053u, 2030193788u,
+360256231u, 107312677u,
+310517502u, 2618936366u,
+3600462351u, 1216645846u,
+2970730323u, 4278812598u,
+94638678u, 1689811113u,
+4125738800u, 3103759730u,
+103797041u, 1397772514u,
+1669653333u, 572567964u,
+1612872497u, 2986430557u,
+214990655u, 3117607990u,
+1949717207u, 2260498180u,
+1493936866u, 3554860960u,
+1582022990u, 1263709570u,
+1244120487u, 3416600761u,
+224580012u, 4252610345u,
+286306391u, 814956796u,
+1820532305u, 2776960536u,
+3082703465u, 1659265982u,
+1157398049u, 3752806924u,
+3508246460u, 2902716664u,
+2110942730u, 3267551635u,
+902835431u, 405228165u,
+2341378668u, 2220373824u,
+3303626294u, 1175118221u,
+383517064u, 896322512u,
+1697257567u, 2202820683u,
+1837689083u, 1336556841u,
+914535232u, 3634083711u,
+1537187340u, 3712582785u,
+1088201893u, 3270984620u,
+3093195926u, 2561488770u,
+1962968100u, 236189500u,
+2549435227u, 536047554u,
+422609195u, 2958815818u,
+4166184983u, 3528794619u,
+1042329086u, 3914176886u,
+1359641525u, 1197100813u,
+1269739674u, 3301844628u,
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+};
+
+// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
+bool Test(int offset, int len = 0) {
+#undef Check
+#undef IsAlive
+
+#define Check(x) do { \
+ const uint32_t actual = (x), e = expected[index++]; \
+ bool ok = actual == e; \
+ if (!ok) { \
+ cerr << "expected " << hex << e << " but got " << actual << endl; \
+ ++errors; \
+ } \
+ assert(ok); \
+} while (0)
+
+#define IsAlive(x) do { alive += IsNonZero(x); } while (0)
+
+ // After the following line is where the uses of "Check" and such will go.
+ static int index = 0;
+if (offset == -1) { int alive = 0; { uint64_t h = farmhashuo::Hash64WithSeed(data, len++, SEED); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } { uint64_t h = farmhashuo::Hash64(data, len++); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } { uint64_t h = farmhashuo::Hash64(data, len++); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } len -= 3; return alive > 0; }
+{ uint64_t h = farmhashuo::Hash64WithSeed(data + offset, len, SEED); Check(h >> 32); Check((h << 32) >> 32); }
+{ uint64_t h = farmhashuo::Hash64(data + offset, len); Check(h >> 32); Check((h << 32) >> 32); }
+
+ return true;
+#undef Check
+#undef IsAlive
+}
+
+int RunTest() {
+ Setup();
+ int i = 0;
+ cout << "Running farmhashuoTest";
+ if (!Test(-1)) {
+ cout << "... Unavailable\n";
+ return NoteErrors();
+ }
+ // Good. The function is attempting to hash, so run the full test.
+ int errors_prior_to_test = errors;
+ for ( ; i < kTestSize - 1; i++) {
+ Test(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ Test(0, i);
+ }
+ Test(0, kDataSize);
+ cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
+ return NoteErrors();
+}
+
+#else
+
+// After the following line is where the code to print hash codes will go.
+void Dump(int offset, int len) {
+{ uint64_t h = farmhashuo::Hash64WithSeed(data + offset, len, SEED); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+{ uint64_t h = farmhashuo::Hash64(data + offset, len); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+}
+
+#endif
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+
+} // namespace farmhashuoTest
+
+#if !TESTING
+int main(int argc, char** argv) {
+ Setup();
+ cout << "uint32_t expected[] = {\n";
+ int i = 0;
+ for ( ; i < kTestSize - 1; i++) {
+ farmhashuoTest::Dump(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ farmhashuoTest::Dump(0, i);
+ }
+ farmhashuoTest::Dump(0, kDataSize);
+ cout << "};\n";
+}
+#endif
+#ifndef FARMHASH_SELF_TEST_GUARD
+#define FARMHASH_SELF_TEST_GUARD
+#include <cstdio>
+#include <iostream>
+#include <string.h>
+
+using std::cout;
+using std::cerr;
+using std::endl;
+using std::hex;
+
+static const uint64_t kSeed0 = 1234567;
+static const uint64_t kSeed1 = k0;
+static const int kDataSize = 1 << 20;
+static const int kTestSize = 300;
+#define kSeed128 Uint128(kSeed0, kSeed1)
+
+static char data[kDataSize];
+
+static int completed_self_tests = 0;
+static int errors = 0;
+
+// Initialize data to pseudorandom values.
+void Setup() {
+ if (completed_self_tests == 0) {
+ uint64_t a = 9;
+ uint64_t b = 777;
+ for (int i = 0; i < kDataSize; i++) {
+ a += b;
+ b += a;
+ a = (a ^ (a >> 41)) * k0;
+ b = (b ^ (b >> 41)) * k0 + i;
+ uint8_t u = b >> 37;
+ memcpy(data + i, &u, 1); // uint8_t -> char
+ }
+ }
+}
+
+int NoteErrors() {
+#define NUM_SELF_TESTS 9
+ if (++completed_self_tests == NUM_SELF_TESTS)
+ std::exit(errors > 0);
+ return errors;
+}
+
+template <typename T> inline bool IsNonZero(T x) {
+ return x != 0;
+}
+
+template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
+ return x != Uint128(0, 0);
+}
+
+#endif // FARMHASH_SELF_TEST_GUARD
+
+namespace farmhashxoTest {
+
+uint32_t CreateSeed(int offset, int salt) {
+ uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h += static_cast<uint32_t>(offset & 0xffffffff);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ h = h * c1;
+ h ^= (h >> 17);
+ return h;
+}
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+#define SEED CreateSeed(offset, -1)
+#define SEED0 CreateSeed(offset, 0)
+#define SEED1 CreateSeed(offset, 1)
+
+#undef TESTING
+#define TESTING 1
+#if TESTING
+uint32_t expected[] = {
+1140953930u, 861465670u,
+3277735313u, 2681724312u,
+2598464059u, 797982799u,
+890626835u, 800175912u,
+2603993599u, 921001710u,
+1410420968u, 2134990486u,
+3283896453u, 1867689945u,
+2914424215u, 2244477846u,
+255297188u, 2992121793u,
+1110588164u, 4186314283u,
+161451183u, 3943596029u,
+4019337850u, 452431531u,
+283198166u, 2741341286u,
+3379021470u, 2557197665u,
+299850021u, 2532580744u,
+452473466u, 1706958772u,
+1298374911u, 3099673830u,
+2199864459u, 3696623795u,
+236935126u, 2976578695u,
+4055299123u, 3281581178u,
+1053458494u, 1882212500u,
+2305012065u, 2169731866u,
+3456121707u, 275903667u,
+458884671u, 3033004529u,
+3058973506u, 2379411653u,
+1898235244u, 1402319660u,
+2700149065u, 2699376854u,
+147814787u, 720739346u,
+2433714046u, 4222949502u,
+4220361840u, 1712034059u,
+3425469811u, 3690733394u,
+4148372108u, 1330324210u,
+594028478u, 2921867846u,
+1635026870u, 192883107u,
+780716741u, 1728752234u,
+3280331829u, 326029180u,
+3969463346u, 1436364519u,
+393215742u, 3349570000u,
+3824583307u, 1612122221u,
+2859809759u, 3808705738u,
+1379537552u, 1646032583u,
+2233466664u, 1432476832u,
+4023053163u, 2650381482u,
+2052294713u, 3552092450u,
+1628777059u, 1499109081u,
+3476440786u, 3829307897u,
+2960536756u, 1554038301u,
+1145519619u, 3190844552u,
+2902102606u, 3600725550u,
+237495366u, 540224401u,
+65721842u, 489963606u,
+1448662590u, 397635823u,
+1596489240u, 1562872448u,
+1790705123u, 2128624475u,
+180854224u, 2604346966u,
+1435705557u, 1262831810u,
+155445229u, 1672724608u,
+1669465176u, 1341975128u,
+663607706u, 2077310004u,
+3610042449u, 1911523866u,
+1043692997u, 1454396064u,
+2563776023u, 294527927u,
+1099072299u, 1389770549u,
+703505868u, 678706990u,
+2952353448u, 2026137563u,
+3603803785u, 629449419u,
+1933894405u, 3043213226u,
+226132789u, 2489287368u,
+1552847036u, 645684964u,
+3828089804u, 3632594520u,
+187883449u, 230403464u,
+3151491850u, 3272648435u,
+3729087873u, 1303930448u,
+2002861219u, 165370827u,
+916494250u, 1230085527u,
+3103338579u, 3064290191u,
+3807265751u, 3628174014u,
+231181488u, 851743255u,
+2295806711u, 1781190011u,
+2988893883u, 1554380634u,
+1142264800u, 3667013118u,
+1968445277u, 315203929u,
+2638023604u, 2290487377u,
+732137533u, 1909203251u,
+440398219u, 1891630171u,
+1380301172u, 1498556724u,
+4072067757u, 4165088768u,
+4204318635u, 441430649u,
+3931792696u, 197618179u,
+956300927u, 914413116u,
+3010839769u, 2837339569u,
+2148126371u, 1913303225u,
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+4139181436u, 2993479124u,
+3178848746u, 1357272220u,
+1438494951u, 507436733u,
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+126024219u, 146044391u,
+1016656857u, 3022024459u,
+3254014218u, 429095991u,
+990500595u, 3056862311u,
+985653208u, 1718653828u,
+623071693u, 366414107u,
+1771289760u, 2293458109u,
+3047342438u, 2991127487u,
+3120876698u, 1684583131u,
+3638043310u, 1170404994u,
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+199124911u, 520792961u,
+3169775996u, 1577421232u,
+3331828431u, 1013201099u,
+1716848157u, 4033596884u,
+1770708857u, 4229339322u,
+1146169032u, 1434258493u,
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+1926419493u, 2649785113u,
+872586426u, 762243036u,
+2736953692u, 816692935u,
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+3830962609u, 2391606125u,
+3544509313u, 622325861u,
+834785312u, 382936554u,
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+2584372201u, 1758123094u,
+1891789696u, 389974094u,
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+2804483644u, 3088828656u,
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+1677744031u, 3532596884u,
+3162657845u, 3887208531u,
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+392987633u, 3233195759u,
+3606709555u, 3424793077u,
+315836068u, 3200749877u,
+4065431359u, 760633989u,
+2982018998u, 1811050648u,
+234531934u, 1115203611u,
+3897494162u, 1516407838u,
+1603559457u, 323296368u,
+2632963283u, 1778459926u,
+2879836826u, 2146672889u,
+3486330348u, 492621815u,
+1231665285u, 2457048126u,
+3438440082u, 2217471853u,
+3355404249u, 3275550588u,
+1052645068u, 862072556u,
+4110617119u, 3745267835u,
+2657392572u, 4279236653u,
+1688445808u, 701920051u,
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+1651193125u, 3326135446u,
+1073280453u, 97376972u,
+2513844237u, 2187968410u,
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+3000537321u, 479241367u,
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+144264390u, 1439630796u,
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+3348954692u, 2166575624u,
+1819263183u, 2028531518u,
+2154809766u, 3672399742u,
+1142139448u, 88299682u,
+76727603u, 4198182186u,
+2304993586u, 1666387627u,
+2488475423u, 3832777692u,
+284366017u, 3359785538u,
+3469807328u, 2926494787u,
+1914195188u, 1134129972u,
+3829072836u, 2493478921u,
+3738499303u, 3311304980u,
+726951526u, 911080963u,
+932916545u, 2235559063u,
+2909742396u, 1765719309u,
+465269850u, 3803621553u,
+1456588655u, 508290328u,
+1490719640u, 3356513470u,
+2262196163u, 1451774941u,
+2908490783u, 251085588u,
+830410677u, 3172220325u,
+4039692645u, 1383603170u,
+3897208579u, 1940535730u,
+151909546u, 2384458112u,
+};
+
+// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
+bool Test(int offset, int len = 0) {
+#undef Check
+#undef IsAlive
+
+#define Check(x) do { \
+ const uint32_t actual = (x), e = expected[index++]; \
+ bool ok = actual == e; \
+ if (!ok) { \
+ cerr << "expected " << hex << e << " but got " << actual << endl; \
+ ++errors; \
+ } \
+ assert(ok); \
+} while (0)
+
+#define IsAlive(x) do { alive += IsNonZero(x); } while (0)
+
+ // After the following line is where the uses of "Check" and such will go.
+ static int index = 0;
+if (offset == -1) { int alive = 0; { uint64_t h = farmhashxo::Hash64WithSeeds(data, len++, SEED0, SEED1); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } { uint64_t h = farmhashxo::Hash64WithSeed(data, len++, SEED); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } { uint64_t h = farmhashxo::Hash64(data, len++); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } len -= 3; return alive > 0; }
+{ uint64_t h = farmhashxo::Hash64WithSeeds(data + offset, len, SEED0, SEED1); Check(h >> 32); Check((h << 32) >> 32); }
+{ uint64_t h = farmhashxo::Hash64WithSeed(data + offset, len, SEED); Check(h >> 32); Check((h << 32) >> 32); }
+{ uint64_t h = farmhashxo::Hash64(data + offset, len); Check(h >> 32); Check((h << 32) >> 32); }
+
+ return true;
+#undef Check
+#undef IsAlive
+}
+
+int RunTest() {
+ Setup();
+ int i = 0;
+ cout << "Running farmhashxoTest";
+ if (!Test(-1)) {
+ cout << "... Unavailable\n";
+ return NoteErrors();
+ }
+ // Good. The function is attempting to hash, so run the full test.
+ int errors_prior_to_test = errors;
+ for ( ; i < kTestSize - 1; i++) {
+ Test(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ Test(0, i);
+ }
+ Test(0, kDataSize);
+ cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
+ return NoteErrors();
+}
+
+#else
+
+// After the following line is where the code to print hash codes will go.
+void Dump(int offset, int len) {
+{ uint64_t h = farmhashxo::Hash64WithSeeds(data + offset, len, SEED0, SEED1); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+{ uint64_t h = farmhashxo::Hash64WithSeed(data + offset, len, SEED); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+{ uint64_t h = farmhashxo::Hash64(data + offset, len); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
+}
+
+#endif
+
+#undef SEED
+#undef SEED1
+#undef SEED0
+
+} // namespace farmhashxoTest
+
+#if !TESTING
+int main(int argc, char** argv) {
+ Setup();
+ cout << "uint32_t expected[] = {\n";
+ int i = 0;
+ for ( ; i < kTestSize - 1; i++) {
+ farmhashxoTest::Dump(i * i, i);
+ }
+ for ( ; i < kDataSize; i += i / 7) {
+ farmhashxoTest::Dump(0, i);
+ }
+ farmhashxoTest::Dump(0, kDataSize);
+ cout << "};\n";
+}
+#endif
+
+int main() {
+ farmhashccTest::RunTest();
+ farmhashmkTest::RunTest();
+ farmhashnaTest::RunTest();
+ farmhashntTest::RunTest();
+ farmhashsaTest::RunTest();
+ farmhashsuTest::RunTest();
+ farmhashteTest::RunTest();
+ farmhashuoTest::RunTest();
+ farmhashxoTest::RunTest();
+ __builtin_unreachable();
+}
+
+#endif // FARMHASHSELFTEST
diff --git a/src/farmhash.h b/src/farmhash.h
new file mode 100644
index 0000000..4997bb7
--- /dev/null
+++ b/src/farmhash.h
@@ -0,0 +1,328 @@
+// Copyright (c) 2014 Google, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+// FarmHash, by Geoff Pike
+
+//
+// http://code.google.com/p/farmhash/
+//
+// This file provides a few functions for hashing strings and other
+// data. All of them are high-quality functions in the sense that
+// they do well on standard tests such as Austin Appleby's SMHasher.
+// They're also fast. FarmHash is the successor to CityHash.
+//
+// Functions in the FarmHash family are not suitable for cryptography.
+//
+// WARNING: This code has been only lightly tested on big-endian platforms!
+// It is known to work well on little-endian platforms that have a small penalty
+// for unaligned reads, such as current Intel and AMD moderate-to-high-end CPUs.
+// It should work on all 32-bit and 64-bit platforms that allow unaligned reads;
+// bug reports are welcome.
+//
+// By the way, for some hash functions, given strings a and b, the hash
+// of a+b is easily derived from the hashes of a and b. This property
+// doesn't hold for any hash functions in this file.
+
+#ifndef FARM_HASH_H_
+#define FARM_HASH_H_
+
+#include <assert.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h> // for memcpy and memset
+#include <utility>
+
+#ifndef NAMESPACE_FOR_HASH_FUNCTIONS
+#define NAMESPACE_FOR_HASH_FUNCTIONS util
+#endif
+
+namespace NAMESPACE_FOR_HASH_FUNCTIONS {
+
+#if defined(FARMHASH_UINT128_T_DEFINED)
+#if defined(__clang__)
+#if !defined(uint128_t)
+#define uint128_t __uint128_t
+#endif
+#endif
+inline uint64_t Uint128Low64(const uint128_t x) {
+ return static_cast<uint64_t>(x);
+}
+inline uint64_t Uint128High64(const uint128_t x) {
+ return static_cast<uint64_t>(x >> 64);
+}
+inline uint128_t Uint128(uint64_t lo, uint64_t hi) {
+ return lo + (((uint128_t)hi) << 64);
+}
+#else
+typedef std::pair<uint64_t, uint64_t> uint128_t;
+inline uint64_t Uint128Low64(const uint128_t x) { return x.first; }
+inline uint64_t Uint128High64(const uint128_t x) { return x.second; }
+inline uint128_t Uint128(uint64_t lo, uint64_t hi) { return uint128_t(lo, hi); }
+#endif
+
+
+// BASIC STRING HASHING
+
+// Hash function for a byte array.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+size_t Hash(const char* s, size_t len);
+
+// Hash function for a byte array. Most useful in 32-bit binaries.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint32_t Hash32(const char* s, size_t len);
+
+// Hash function for a byte array. For convenience, a 32-bit seed is also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint32_t Hash32WithSeed(const char* s, size_t len, uint32_t seed);
+
+// Hash function for a byte array.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint64_t Hash64(const char* s, size_t len);
+
+// Hash function for a byte array. For convenience, a 64-bit seed is also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint64_t Hash64WithSeed(const char* s, size_t len, uint64_t seed);
+
+// Hash function for a byte array. For convenience, two seeds are also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint64_t Hash64WithSeeds(const char* s, size_t len,
+ uint64_t seed0, uint64_t seed1);
+
+// Hash function for a byte array.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint128_t Hash128(const char* s, size_t len);
+
+// Hash function for a byte array. For convenience, a 128-bit seed is also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+uint128_t Hash128WithSeed(const char* s, size_t len, uint128_t seed);
+
+// BASIC NON-STRING HASHING
+
+// Hash 128 input bits down to 64 bits of output.
+// This is intended to be a reasonably good hash function.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+inline uint64_t Hash128to64(uint128_t x) {
+ // Murmur-inspired hashing.
+ const uint64_t kMul = 0x9ddfea08eb382d69ULL;
+ uint64_t a = (Uint128Low64(x) ^ Uint128High64(x)) * kMul;
+ a ^= (a >> 47);
+ uint64_t b = (Uint128High64(x) ^ a) * kMul;
+ b ^= (b >> 47);
+ b *= kMul;
+ return b;
+}
+
+// FINGERPRINTING (i.e., good, portable, forever-fixed hash functions)
+
+// Fingerprint function for a byte array. Most useful in 32-bit binaries.
+uint32_t Fingerprint32(const char* s, size_t len);
+
+// Fingerprint function for a byte array.
+uint64_t Fingerprint64(const char* s, size_t len);
+
+// Fingerprint function for a byte array.
+uint128_t Fingerprint128(const char* s, size_t len);
+
+// This is intended to be a good fingerprinting primitive.
+// See below for more overloads.
+inline uint64_t Fingerprint(uint128_t x) {
+ // Murmur-inspired hashing.
+ const uint64_t kMul = 0x9ddfea08eb382d69ULL;
+ uint64_t a = (Uint128Low64(x) ^ Uint128High64(x)) * kMul;
+ a ^= (a >> 47);
+ uint64_t b = (Uint128High64(x) ^ a) * kMul;
+ b ^= (b >> 44);
+ b *= kMul;
+ b ^= (b >> 41);
+ b *= kMul;
+ return b;
+}
+
+// This is intended to be a good fingerprinting primitive.
+inline uint64_t Fingerprint(uint64_t x) {
+ // Murmur-inspired hashing.
+ const uint64_t kMul = 0x9ddfea08eb382d69ULL;
+ uint64_t b = x * kMul;
+ b ^= (b >> 44);
+ b *= kMul;
+ b ^= (b >> 41);
+ b *= kMul;
+ return b;
+}
+
+#ifndef FARMHASH_NO_CXX_STRING
+
+// Convenience functions to hash or fingerprint C++ strings.
+// These require that Str::data() return a pointer to the first char
+// (as a const char*) and that Str::length() return the string's length;
+// they work with std::string, for example.
+
+// Hash function for a byte array.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+template <typename Str>
+inline size_t Hash(const Str& s) {
+ assert(sizeof(s[0]) == 1);
+ return Hash(s.data(), s.length());
+}
+
+// Hash function for a byte array. Most useful in 32-bit binaries.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+template <typename Str>
+inline uint32_t Hash32(const Str& s) {
+ assert(sizeof(s[0]) == 1);
+ return Hash32(s.data(), s.length());
+}
+
+// Hash function for a byte array. For convenience, a 32-bit seed is also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+template <typename Str>
+inline uint32_t Hash32WithSeed(const Str& s, uint32_t seed) {
+ assert(sizeof(s[0]) == 1);
+ return Hash32WithSeed(s.data(), s.length(), seed);
+}
+
+// Hash 128 input bits down to 64 bits of output.
+// Hash function for a byte array.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+template <typename Str>
+inline uint64_t Hash64(const Str& s) {
+ assert(sizeof(s[0]) == 1);
+ return Hash64(s.data(), s.length());
+}
+
+// Hash function for a byte array. For convenience, a 64-bit seed is also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+template <typename Str>
+inline uint64_t Hash64WithSeed(const Str& s, uint64_t seed) {
+ assert(sizeof(s[0]) == 1);
+ return Hash64WithSeed(s.data(), s.length(), seed);
+}
+
+// Hash function for a byte array. For convenience, two seeds are also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+template <typename Str>
+inline uint64_t Hash64WithSeeds(const Str& s, uint64_t seed0, uint64_t seed1) {
+ assert(sizeof(s[0]) == 1);
+ return Hash64WithSeeds(s.data(), s.length(), seed0, seed1);
+}
+
+// Hash function for a byte array.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+template <typename Str>
+inline uint128_t Hash128(const Str& s) {
+ assert(sizeof(s[0]) == 1);
+ return Hash128(s.data(), s.length());
+}
+
+// Hash function for a byte array. For convenience, a 128-bit seed is also
+// hashed into the result.
+// May change from time to time, may differ on different platforms, may differ
+// depending on NDEBUG.
+template <typename Str>
+inline uint128_t Hash128WithSeed(const Str& s, uint128_t seed) {
+ assert(sizeof(s[0]) == 1);
+ return Hash128(s.data(), s.length(), seed);
+}
+
+// FINGERPRINTING (i.e., good, portable, forever-fixed hash functions)
+
+// Fingerprint function for a byte array. Most useful in 32-bit binaries.
+template <typename Str>
+inline uint32_t Fingerprint32(const Str& s) {
+ assert(sizeof(s[0]) == 1);
+ return Fingerprint32(s.data(), s.length());
+}
+
+// Fingerprint 128 input bits down to 64 bits of output.
+// Fingerprint function for a byte array.
+template <typename Str>
+inline uint64_t Fingerprint64(const Str& s) {
+ assert(sizeof(s[0]) == 1);
+ return Fingerprint64(s.data(), s.length());
+}
+
+// Fingerprint function for a byte array.
+template <typename Str>
+inline uint128_t Fingerprint128(const Str& s) {
+ assert(sizeof(s[0]) == 1);
+ return Fingerprint128(s.data(), s.length());
+}
+
+#endif
+
+} // namespace NAMESPACE_FOR_HASH_FUNCTIONS
+
+/* gently define FARMHASH_BIG_ENDIAN when detected big-endian machine */
+#if defined(__BIG_ENDIAN__)
+ #if !defined(FARMHASH_BIG_ENDIAN)
+ #define FARMHASH_BIG_ENDIAN
+ #endif
+#elif defined(__LITTLE_ENDIAN__)
+ // nothing for little-endian
+#elif defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && (__BYTE_ORDER == __ORDER_LITTLE_ENDIAN__)
+ // nothing for little-endian
+#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && (__BYTE_ORDER == __ORDER_BIG_ENDIAN__)
+ #if !defined(FARMHASH_BIG_ENDIAN)
+ #define FARMHASH_BIG_ENDIAN
+ #endif
+#elif defined(__linux__) || defined(__CYGWIN__) || defined( __GNUC__ ) && !defined(_WIN32) || defined( __GNU_LIBRARY__ )
+ #include <endian.h> // libc6-dev, GLIBC
+ #if BYTE_ORDER == BIG_ENDIAN
+ #if !defined(FARMHASH_BIG_ENDIAN)
+ #define FARMHASH_BIG_ENDIAN
+ #endif
+ #endif
+#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) || defined(__s390x__)
+ #include <sys/endian.h>
+ #if BYTE_ORDER == BIG_ENDIAN
+ #if !defined(FARMHASH_BIG_ENDIAN)
+ #define FARMHASH_BIG_ENDIAN
+ #endif
+ #endif
+#elif defined(_WIN32)
+ // Windows is (currently) little-endian
+#else
+ #error "Unable to determine endianness!"
+#endif /* __BIG_ENDIAN__ */
+
+#endif // FARM_HASH_H_
