/*

xxHash - Fast Hash algorithm

Copyright (C) 2012-2014, Yann Collet.

BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions are

met:

* Redistributions of source code must retain the above copyright

notice, this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above

copyright notice, this list of conditions and the following disclaimer

in the documentation and/or other materials provided with the

distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

You can contact the author at :

- xxHash source repository : http://code.google.com/p/xxhash/

- public discussion board : https://groups.google.com/forum/#!forum/lz4c

*/

//**************************************

// Tuning parameters

//**************************************

// Unaligned memory access is automatically enabled for "common" CPU, such as x86.

// For others CPU, the compiler will be more cautious, and insert extra code to ensure aligned access is respected.

// If you know your target CPU supports unaligned memory access, you want to force this option manually to improve performance.

// You can also enable this parameter if you know your input data will always be aligned (boundaries of 4, for U32).

#if defined(__ARM_FEATURE_UNALIGNED) || defined(__i386) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64)

# define XXH_USE_UNALIGNED_ACCESS 1

#endif

// XXH_ACCEPT_NULL_INPUT_POINTER :

// If the input pointer is a null pointer, xxHash default behavior is to trigger a memory access error, since it is a bad pointer.

// When this option is enabled, xxHash output for null input pointers will be the same as a null-length input.

// This option has a very small performance cost (only measurable on small inputs).

// By default, this option is disabled. To enable it, uncomment below define :

// #define XXH_ACCEPT_NULL_INPUT_POINTER 1

// XXH_FORCE_NATIVE_FORMAT :

// By default, xxHash library provides endian-independant Hash values, based on little-endian convention.

// Results are therefore identical for little-endian and big-endian CPU.

// This comes at a performance cost for big-endian CPU, since some swapping is required to emulate little-endian format.

// Should endian-independance be of no importance for your application, you may set the #define below to 1.

// It will improve speed for Big-endian CPU.

// This option has no impact on Little_Endian CPU.

#define XXH_FORCE_NATIVE_FORMAT 0

//**************************************

// Includes & Memory related functions

//**************************************

#include "xxhash.h"

// Modify the local functions below should you wish to use some other memory routines

// for malloc(), free()

#include <stdlib.h>

static inline void* XXH_malloc(size_t s) { return malloc(s); }

static inline void XXH_free (void* p) { free(p); }

// for memcpy()

#include <string.h>

static inline void* XXH_memcpy(void* dest, const void* src, size_t size)

{

return memcpy(dest,src,size);

}

//**************************************

// Basic Types

//**************************************

#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L // C99

# include <stdint.h>

typedef uint8_t BYTE;

typedef uint16_t U16;

typedef uint32_t U32;

typedef int32_t S32;

typedef uint64_t U64;

#else

typedef unsigned char BYTE;

typedef unsigned short U16;

typedef unsigned int U32;

typedef signed int S32;

typedef unsigned long long U64;

#endif

#if defined(__GNUC__) && !defined(XXH_USE_UNALIGNED_ACCESS)

# define _PACKED __attribute__ ((packed))

#else

# define _PACKED

#endif

#if !defined(XXH_USE_UNALIGNED_ACCESS) && !defined(__GNUC__)

# ifdef __IBMC__

# pragma pack(1)

# else

# pragma pack(push, 1)

# endif

#endif

typedef struct _U32_S

{

U32 v;

} _PACKED U32_S;

typedef struct _U64_S

{

U64 v;

} _PACKED U64_S;

#if !defined(XXH_USE_UNALIGNED_ACCESS) && !defined(__GNUC__)

# pragma pack(pop)

#endif

#define A32(x) (((U32_S *)(x))->v)

#define A64(x) (((U64_S *)(x))->v)

#define XXH_rotl32(x,r) ((x << r) | (x >> (32 - r)))

#define XXH_rotl64(x,r) ((x << r) | (x >> (64 - r)))

#define XXH_swap32 __builtin_bswap32

#define XXH_swap64 __builtin_bswap64

//**************************************

// Constants

//**************************************

#define PRIME32_1 2654435761U

#define PRIME32_2 2246822519U

#define PRIME32_3 3266489917U

#define PRIME32_4 668265263U

#define PRIME32_5 374761393U

#define PRIME64_1 11400714785074694791ULL

#define PRIME64_2 14029467366897019727ULL

#define PRIME64_3 1609587929392839161ULL

#define PRIME64_4 9650029242287828579ULL

#define PRIME64_5 2870177450012600261ULL

//**************************************

// Architecture Macros

//**************************************

typedef enum { XXH_bigEndian=0, XXH_littleEndian=1 } XXH_endianess;

#ifndef XXH_CPU_LITTLE_ENDIAN // It is possible to define XXH_CPU_LITTLE_ENDIAN externally, for example using a compiler switch

static const int one = 1;

# define XXH_CPU_LITTLE_ENDIAN (*(char*)(&one))

#endif

//**************************************

// Macros

//**************************************

#define XXH_STATIC_ASSERT(c) { enum { XXH_static_assert = 1/(!!(c)) }; } // use only *after* variable declarations

//****************************

// Memory reads

//****************************

typedef enum { XXH_aligned, XXH_unaligned } XXH_alignment;

static inline U32 XXH_readLE32_align(const U32* ptr, XXH_endianess endian, XXH_alignment align)

{

if (align==XXH_unaligned)

return endian==XXH_littleEndian ? A32(ptr) : XXH_swap32(A32(ptr));

else

return endian==XXH_littleEndian ? *ptr : XXH_swap32(*ptr);

}

static inline U32 XXH_readLE32(const U32* ptr, XXH_endianess endian)

{

return XXH_readLE32_align(ptr, endian, XXH_unaligned);

}

static inline U64 XXH_readLE64_align(const U64* ptr, XXH_endianess endian, XXH_alignment align)

{

if (align==XXH_unaligned)

return endian==XXH_littleEndian ? A64(ptr) : XXH_swap64(A64(ptr));

else

return endian==XXH_littleEndian ? *ptr : XXH_swap64(*ptr);

}

static inline U64 XXH_readLE64(const U64* ptr, XXH_endianess endian)

{

return XXH_readLE64_align(ptr, endian, XXH_unaligned);

}

//****************************

// Simple Hash Functions

//****************************

static inline U32 XXH32_endian_align(const void* input, size_t len, U32 seed, XXH_endianess endian, XXH_alignment align)

{

const BYTE* p = (const BYTE*)input;

const BYTE* bEnd = p + len;

U32 h32;

#define XXH_get32bits(p) XXH_readLE32_align((const U32*)p, endian, align)

#ifdef XXH_ACCEPT_NULL_INPUT_POINTER

if (p==NULL)

{

len=0;

bEnd=p=(const BYTE*)(size_t)16;

}

#endif

if (len>=16)

{

const BYTE* const limit = bEnd - 16;

U32 v1 = seed + PRIME32_1 + PRIME32_2;

U32 v2 = seed + PRIME32_2;

U32 v3 = seed + 0;

U32 v4 = seed - PRIME32_1;

do

{

v1 += XXH_get32bits(p) * PRIME32_2;

v1 = XXH_rotl32(v1, 13);

v1 *= PRIME32_1;

p+=4;

v2 += XXH_get32bits(p) * PRIME32_2;

v2 = XXH_rotl32(v2, 13);

v2 *= PRIME32_1;

p+=4;

v3 += XXH_get32bits(p) * PRIME32_2;

v3 = XXH_rotl32(v3, 13);

v3 *= PRIME32_1;

p+=4;

v4 += XXH_get32bits(p) * PRIME32_2;

v4 = XXH_rotl32(v4, 13);

v4 *= PRIME32_1;

p+=4;

}

while (p<=limit);

h32 = XXH_rotl32(v1, 1) + XXH_rotl32(v2, 7) + XXH_rotl32(v3, 12) + XXH_rotl32(v4, 18);

}

else

{

h32 = seed + PRIME32_5;

}

h32 += (U32) len;

while (p+4<=bEnd)

{

h32 += XXH_get32bits(p) * PRIME32_3;

h32 = XXH_rotl32(h32, 17) * PRIME32_4 ;

p+=4;

}

while (p<bEnd)

{

h32 += (*p) * PRIME32_5;

h32 = XXH_rotl32(h32, 11) * PRIME32_1 ;

p++;

}

h32 ^= h32 >> 15;

h32 *= PRIME32_2;

h32 ^= h32 >> 13;

h32 *= PRIME32_3;

h32 ^= h32 >> 16;

return h32;

}

unsigned int XXH32 (const void* input, size_t len, unsigned seed)

{

#if 0

// Simple version, good for code maintenance, but unfortunately slow for small inputs

XXH32_state_t state;

XXH32_reset(&state, seed);

XXH32_update(&state, input, len);

return XXH32_digest(&state);

#else

XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;

# if !defined(XXH_USE_UNALIGNED_ACCESS)

if ((((size_t)input) & 3) == 0) // Input is aligned, let's leverage the speed advantage

{

if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)

return XXH32_endian_align(input, len, seed, XXH_littleEndian, XXH_aligned);

else

return XXH32_endian_align(input, len, seed, XXH_bigEndian, XXH_aligned);

}

# endif

if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)

return XXH32_endian_align(input, len, seed, XXH_littleEndian, XXH_unaligned);

else

return XXH32_endian_align(input, len, seed, XXH_bigEndian, XXH_unaligned);

#endif

}

static inline U64 XXH64_endian_align(const void* input, size_t len, U64 seed, XXH_endianess endian, XXH_alignment align)

{

const BYTE* p = (const BYTE*)input;

const BYTE* bEnd = p + len;

U64 h64;

#define XXH_get64bits(p) XXH_readLE64_align((const U64*)p, endian, align)

#ifdef XXH_ACCEPT_NULL_INPUT_POINTER

if (p==NULL)

{

len=0;

bEnd=p=(const BYTE*)(size_t)32;

}

#endif

if (len>=32)

{

const BYTE* const limit = bEnd - 32;

U64 v1 = seed + PRIME64_1 + PRIME64_2;

U64 v2 = seed + PRIME64_2;

U64 v3 = seed + 0;

U64 v4 = seed - PRIME64_1;

do

{

v1 += XXH_get64bits(p) * PRIME64_2;

p+=8;

v1 = XXH_rotl64(v1, 31);

v1 *= PRIME64_1;

v2 += XXH_get64bits(p) * PRIME64_2;

p+=8;

v2 = XXH_rotl64(v2, 31);

v2 *= PRIME64_1;

v3 += XXH_get64bits(p) * PRIME64_2;

p+=8;

v3 = XXH_rotl64(v3, 31);

v3 *= PRIME64_1;

v4 += XXH_get64bits(p) * PRIME64_2;

p+=8;

v4 = XXH_rotl64(v4, 31);

v4 *= PRIME64_1;

}

while (p<=limit);

h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);

v1 *= PRIME64_2;

v1 = XXH_rotl64(v1, 31);

v1 *= PRIME64_1;

h64 ^= v1;

h64 = h64 * PRIME64_1 + PRIME64_4;

v2 *= PRIME64_2;

v2 = XXH_rotl64(v2, 31);

v2 *= PRIME64_1;

h64 ^= v2;

h64 = h64 * PRIME64_1 + PRIME64_4;

v3 *= PRIME64_2;

v3 = XXH_rotl64(v3, 31);

v3 *= PRIME64_1;

h64 ^= v3;

h64 = h64 * PRIME64_1 + PRIME64_4;

v4 *= PRIME64_2;

v4 = XXH_rotl64(v4, 31);

v4 *= PRIME64_1;

h64 ^= v4;

h64 = h64 * PRIME64_1 + PRIME64_4;

}

else

{

h64 = seed + PRIME64_5;

}

h64 += (U64) len;

while (p+8<=bEnd)

{

U64 k1 = XXH_get64bits(p);

k1 *= PRIME64_2;

k1 = XXH_rotl64(k1,31);

k1 *= PRIME64_1;

h64 ^= k1;

h64 = XXH_rotl64(h64,27) * PRIME64_1 + PRIME64_4;

p+=8;

}

if (p+4<=bEnd)

{

h64 ^= (U64)(XXH_get32bits(p)) * PRIME64_1;

h64 = XXH_rotl64(h64, 23) * PRIME64_2 + PRIME64_3;

p+=4;

}

while (p<bEnd)

{

h64 ^= (*p) * PRIME64_5;

h64 = XXH_rotl64(h64, 11) * PRIME64_1;

p++;

}

h64 ^= h64 >> 33;

h64 *= PRIME64_2;

h64 ^= h64 >> 29;

h64 *= PRIME64_3;

h64 ^= h64 >> 32;

return h64;

}

unsigned long long XXH64 (const void* input, size_t len, unsigned long long seed)

{

#if 0

// Simple version, good for code maintenance, but unfortunately slow for small inputs

XXH64_state_t state;

XXH64_reset(&state, seed);

XXH64_update(&state, input, len);

return XXH64_digest(&state);

#else

XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;

# if !defined(XXH_USE_UNALIGNED_ACCESS)

if ((((size_t)input) & 7)==0) // Input is aligned, let's leverage the speed advantage

{

if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)

return XXH64_endian_align(input, len, seed, XXH_littleEndian, XXH_aligned);

else

return XXH64_endian_align(input, len, seed, XXH_bigEndian, XXH_aligned);

}

# endif

if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)

return XXH64_endian_align(input, len, seed, XXH_littleEndian, XXH_unaligned);

else

return XXH64_endian_align(input, len, seed, XXH_bigEndian, XXH_unaligned);

#endif

}

/****************************************************

* Advanced Hash Functions

****************************************************/

/*** Allocation ***/

typedef struct

{

U64 total_len;

U32 seed;

U32 v1;

U32 v2;

U32 v3;

U32 v4;

U32 memsize;

char memory[16];

} XXH_istate32_t;

typedef struct

{

U64 total_len;

U64 seed;

U64 v1;

U64 v2;

U64 v3;

U64 v4;

U32 memsize;

char memory[32];

} XXH_istate64_t;

XXH32_state_t* XXH32_createState(void)

{

XXH_STATIC_ASSERT(sizeof(XXH32_state_t) >= sizeof(XXH_istate32_t)); // A compilation error here means XXH32_state_t is not large enough

return (XXH32_state_t*)XXH_malloc(sizeof(XXH32_state_t));

}

XXH_errorcode XXH32_freeState(XXH32_state_t* statePtr)

{

XXH_free(statePtr);

return XXH_OK;

};

XXH64_state_t* XXH64_createState(void)

{

XXH_STATIC_ASSERT(sizeof(XXH64_state_t) >= sizeof(XXH_istate64_t)); // A compilation error here means XXH64_state_t is not large enough

return (XXH64_state_t*)XXH_malloc(sizeof(XXH64_state_t));

}

XXH_errorcode XXH64_freeState(XXH64_state_t* statePtr)

{

XXH_free(statePtr);

return XXH_OK;

};

/*** Hash feed ***/

XXH_errorcode XXH32_reset(XXH32_state_t* state_in, U32 seed)

{

XXH_istate32_t* state = (XXH_istate32_t*) state_in;

state->seed = seed;

state->v1 = seed + PRIME32_1 + PRIME32_2;

state->v2 = seed + PRIME32_2;

state->v3 = seed + 0;

state->v4 = seed - PRIME32_1;

state->total_len = 0;

state->memsize = 0;

return XXH_OK;

}

XXH_errorcode XXH64_reset(XXH64_state_t* state_in, unsigned long long seed)

{

XXH_istate64_t* state = (XXH_istate64_t*) state_in;

state->seed = seed;

state->v1 = seed + PRIME64_1 + PRIME64_2;

state->v2 = seed + PRIME64_2;

state->v3 = seed + 0;

state->v4 = seed - PRIME64_1;

state->total_len = 0;

state->memsize = 0;

return XXH_OK;

}

static inline XXH_errorcode XXH32_update_endian (XXH32_state_t* state_in, const void* input, size_t len, XXH_endianess endian)

{

XXH_istate32_t* state = (XXH_istate32_t *) state_in;

const BYTE* p = (const BYTE*)input;

const BYTE* const bEnd = p + len;

#ifdef XXH_ACCEPT_NULL_INPUT_POINTER

if (input==NULL) return XXH_ERROR;

#endif

state->total_len += len;

if (state->memsize + len < 16) // fill in tmp buffer

{

XXH_memcpy(state->memory + state->memsize, input, len);

state->memsize += (U32)len;

return XXH_OK;

}

if (state->memsize) // some data left from previous update

{

XXH_memcpy(state->memory + state->memsize, input, 16-state->memsize);

{

const U32* p32 = (const U32*)state->memory;

state->v1 += XXH_readLE32(p32, endian) * PRIME32_2;

state->v1 = XXH_rotl32(state->v1, 13);

state->v1 *= PRIME32_1;

p32++;

state->v2 += XXH_readLE32(p32, endian) * PRIME32_2;

state->v2 = XXH_rotl32(state->v2, 13);

state->v2 *= PRIME32_1;

p32++;

state->v3 += XXH_readLE32(p32, endian) * PRIME32_2;

state->v3 = XXH_rotl32(state->v3, 13);

state->v3 *= PRIME32_1;

p32++;

state->v4 += XXH_readLE32(p32, endian) * PRIME32_2;

state->v4 = XXH_rotl32(state->v4, 13);

state->v4 *= PRIME32_1;

p32++;

}

p += 16-state->memsize;

state->memsize = 0;

}

if (p <= bEnd-16)

{

const BYTE* const limit = bEnd - 16;

U32 v1 = state->v1;

U32 v2 = state->v2;

U32 v3 = state->v3;

U32 v4 = state->v4;

do

{

v1 += XXH_readLE32((const U32*)p, endian) * PRIME32_2;

v1 = XXH_rotl32(v1, 13);

v1 *= PRIME32_1;

p+=4;

v2 += XXH_readLE32((const U32*)p, endian) * PRIME32_2;

v2 = XXH_rotl32(v2, 13);

v2 *= PRIME32_1;

p+=4;

v3 += XXH_readLE32((const U32*)p, endian) * PRIME32_2;

v3 = XXH_rotl32(v3, 13);

v3 *= PRIME32_1;

p+=4;

v4 += XXH_readLE32((const U32*)p, endian) * PRIME32_2;

v4 = XXH_rotl32(v4, 13);

v4 *= PRIME32_1;

p+=4;

}

while (p<=limit);

state->v1 = v1;

state->v2 = v2;

state->v3 = v3;

state->v4 = v4;

}

if (p < bEnd)

{

XXH_memcpy(state->memory, p, bEnd-p);

state->memsize = (int)(bEnd-p);

}

return XXH_OK;

}

XXH_errorcode XXH32_update (XXH32_state_t* state_in, const void* input, size_t len)

{

XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;

if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)

return XXH32_update_endian(state_in, input, len, XXH_littleEndian);

else

return XXH32_update_endian(state_in, input, len, XXH_bigEndian);

}

static inline U32 XXH32_digest_endian (const XXH32_state_t* state_in, XXH_endianess endian)

{

XXH_istate32_t* state = (XXH_istate32_t*) state_in;

const BYTE * p = (const BYTE*)state->memory;

BYTE* bEnd = (BYTE*)state->memory + state->memsize;

U32 h32;

if (state->total_len >= 16)

{

h32 = XXH_rotl32(state->v1, 1) + XXH_rotl32(state->v2, 7) + XXH_rotl32(state->v3, 12) + XXH_rotl32(state->v4, 18);

}

else

{

h32 = state->seed + PRIME32_5;

}

h32 += (U32) state->total_len;

while (p+4<=bEnd)

{

h32 += XXH_readLE32((const U32*)p, endian) * PRIME32_3;

h32 = XXH_rotl32(h32, 17) * PRIME32_4;

p+=4;

}

while (p<bEnd)

{

h32 += (*p) * PRIME32_5;

h32 = XXH_rotl32(h32, 11) * PRIME32_1;

p++;

}

h32 ^= h32 >> 15;

h32 *= PRIME32_2;

h32 ^= h32 >> 13;

h32 *= PRIME32_3;

h32 ^= h32 >> 16;

return h32;

}

U32 XXH32_digest (const XXH32_state_t* state_in)

{

XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;

if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)

return XXH32_digest_endian(state_in, XXH_littleEndian);

else

return XXH32_digest_endian(state_in, XXH_bigEndian);

}

static inline XXH_errorcode XXH64_update_endian (XXH64_state_t* state_in, const void* input, size_t len, XXH_endianess endian)

{

XXH_istate64_t * state = (XXH_istate64_t *) state_in;

const BYTE* p = (const BYTE*)input;

const BYTE* const bEnd = p + len;

#ifdef XXH_ACCEPT_NULL_INPUT_POINTER

if (input==NULL) return XXH_ERROR;

#endif

state->total_len += len;

if (state->memsize + len < 32) // fill in tmp buffer

{

XXH_memcpy(state->memory + state->memsize, input, len);

state->memsize += (U32)len;

return XXH_OK;

}

if (state->memsize) // some data left from previous update

{

XXH_memcpy(state->memory + state->memsize, input, 32-state->memsize);

{

const U64* p64 = (const U64*)state->memory;

state->v1 += XXH_readLE64(p64, endian) * PRIME64_2;

state->v1 = XXH_rotl64(state->v1, 31);

state->v1 *= PRIME64_1;

p64++;

state->v2 += XXH_readLE64(p64, endian) * PRIME64_2;

state->v2 = XXH_rotl64(state->v2, 31);

state->v2 *= PRIME64_1;

p64++;

state->v3 += XXH_readLE64(p64, endian) * PRIME64_2;

state->v3 = XXH_rotl64(state->v3, 31);

state->v3 *= PRIME64_1;

p64++;

state->v4 += XXH_readLE64(p64, endian) * PRIME64_2;

state->v4 = XXH_rotl64(state->v4, 31);

state->v4 *= PRIME64_1;

p64++;

}

p += 32-state->memsize;

state->memsize = 0;

}

if (p+32 <= bEnd)

{

const BYTE* const limit = bEnd - 32;

U64 v1 = state->v1;

U64 v2 = state->v2;

U64 v3 = state->v3;

U64 v4 = state->v4;

do

{

v1 += XXH_readLE64((const U64*)p, endian) * PRIME64_2;

v1 = XXH_rotl64(v1, 31);

v1 *= PRIME64_1;

p+=8;

v2 += XXH_readLE64((const U64*)p, endian) * PRIME64_2;

v2 = XXH_rotl64(v2, 31);

v2 *= PRIME64_1;

p+=8;

v3 += XXH_readLE64((const U64*)p, endian) * PRIME64_2;

v3 = XXH_rotl64(v3, 31);

v3 *= PRIME64_1;

p+=8;

v4 += XXH_readLE64((const U64*)p, endian) * PRIME64_2;

v4 = XXH_rotl64(v4, 31);

v4 *= PRIME64_1;

p+=8;

}

while (p<=limit);

state->v1 = v1;

state->v2 = v2;

state->v3 = v3;

state->v4 = v4;

}

if (p < bEnd)

{

XXH_memcpy(state->memory, p, bEnd-p);

state->memsize = (int)(bEnd-p);

}

return XXH_OK;

}

XXH_errorcode XXH64_update (XXH64_state_t* state_in, const void* input, size_t len)

{

XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;

if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)

return XXH64_update_endian(state_in, input, len, XXH_littleEndian);

else

return XXH64_update_endian(state_in, input, len, XXH_bigEndian);

}

static inline U64 XXH64_digest_endian (const XXH64_state_t* state_in, XXH_endianess endian)

{

XXH_istate64_t * state = (XXH_istate64_t *) state_in;

const BYTE * p = (const BYTE*)state->memory;

BYTE* bEnd = (BYTE*)state->memory + state->memsize;

U64 h64;

if (state->total_len >= 32)

{

U64 v1 = state->v1;

U64 v2 = state->v2;

U64 v3 = state->v3;

U64 v4 = state->v4;

h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);

v1 *= PRIME64_2;

v1 = XXH_rotl64(v1, 31);

v1 *= PRIME64_1;

h64 ^= v1;

h64 = h64*PRIME64_1 + PRIME64_4;

v2 *= PRIME64_2;

v2 = XXH_rotl64(v2, 31);

v2 *= PRIME64_1;

h64 ^= v2;

h64 = h64*PRIME64_1 + PRIME64_4;

v3 *= PRIME64_2;

v3 = XXH_rotl64(v3, 31);

v3 *= PRIME64_1;

h64 ^= v3;

h64 = h64*PRIME64_1 + PRIME64_4;

v4 *= PRIME64_2;

v4 = XXH_rotl64(v4, 31);

v4 *= PRIME64_1;

h64 ^= v4;

h64 = h64*PRIME64_1 + PRIME64_4;

}

else

{

h64 = state->seed + PRIME64_5;

}

h64 += (U64) state->total_len;

while (p+8<=bEnd)

{

U64 k1 = XXH_readLE64((const U64*)p, endian);

k1 *= PRIME64_2;

k1 = XXH_rotl64(k1,31);

k1 *= PRIME64_1;

h64 ^= k1;

h64 = XXH_rotl64(h64,27) * PRIME64_1 + PRIME64_4;

p+=8;

}

if (p+4<=bEnd)

{

h64 ^= (U64)(XXH_readLE32((const U32*)p, endian)) * PRIME64_1;

h64 = XXH_rotl64(h64, 23) * PRIME64_2 + PRIME64_3;

p+=4;

}

while (p<bEnd)

{

h64 ^= (*p) * PRIME64_5;

h64 = XXH_rotl64(h64, 11) * PRIME64_1;

p++;

}

h64 ^= h64 >> 33;

h64 *= PRIME64_2;

h64 ^= h64 >> 29;

h64 *= PRIME64_3;

h64 ^= h64 >> 32;

return h64;

}

unsigned long long XXH64_digest (const XXH64_state_t* state_in)

{

XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;

if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)

return XXH64_digest_endian(state_in, XXH_littleEndian);

else

return XXH64_digest_endian(state_in, XXH_bigEndian);

}