Move xxhash to contrib.

3 files changed, 2 insertions, 641 deletions

diff --git a/src/ucl/CMakeLists.txt b/src/ucl/CMakeLists.txt
index cbceff4db..e1df6890e 100644
--- a/src/ucl/CMakeLists.txt
+++ b/src/ucl/CMakeLists.txt
@@ -1,13 +1,13 @@
 SET(UCLSRC            src/ucl_util.c
                       src/ucl_parser.c
                       src/ucl_emitter.c
-                      src/ucl_hash.c
-                      src/xxhash.c)
+                      src/ucl_hash.c)
 
 ADD_LIBRARY(rspamd-ucl ${LINK_TYPE} ${UCLSRC})
 SET_TARGET_PROPERTIES(rspamd-ucl PROPERTIES VERSION ${RSPAMD_VERSION})
 SET_TARGET_PROPERTIES(rspamd-ucl PROPERTIES COMPILE_FLAGS "-DRSPAMD_LIB")
 
+TARGET_LINK_LIBRARIES(rspamd-ucl xxhash)
 IF(HAVE_FETCH_H)
     TARGET_LINK_LIBRARIES(rspamd-ucl fetch)
 ELSE(HAVE_FETCH_H)
diff --git a/src/ucl/src/xxhash.c b/src/ucl/src/xxhash.c
deleted file mode 100644
index 5869503be..000000000
--- a/src/ucl/src/xxhash.c
+++ /dev/null
@@ -1,475 +0,0 @@
-/*

-xxHash - Fast Hash algorithm

-Copyright (C) 2012-2013, 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/

-*/

-

-

-//**************************************

-// 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

-

-

-//**************************************

-// Compiler Specific Options

-//**************************************

-// Disable some Visual warning messages

-#ifdef _MSC_VER  // Visual Studio

-#  pragma warning(disable : 4127)      // disable: C4127: conditional expression is constant

-#endif

-

-#ifdef _MSC_VER    // Visual Studio

-#  define forceinline static __forceinline

-#else 

-#  ifdef __GNUC__

-#    define forceinline static inline __attribute__((always_inline))

-#  else

-#    define forceinline static inline

-#  endif

-#endif

-

-

-//**************************************

-// Includes & Memory related functions

-//**************************************

-#include "xxhash.h"

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

-// for malloc(), free()

-#include <stdlib.h>

-forceinline void* XXH_malloc(size_t s) { return malloc(s); }

-forceinline void  XXH_free  (void* p)  { free(p); }

-// for memcpy()

-#include <string.h>

-forceinline 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;

-

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

-#  pragma pack(pop)

-#endif

-

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

-

-

-//***************************************

-// Compiler-specific Functions and Macros

-//***************************************

-#define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)

-

-// Note : although _rotl exists for minGW (GCC under windows), performance seems poor

-#if defined(_MSC_VER)

-#  define XXH_rotl32(x,r) _rotl(x,r)

-#else

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

-#endif

-

-#if defined(_MSC_VER)     // Visual Studio

-#  define XXH_swap32 _byteswap_ulong

-#elif GCC_VERSION >= 403

-#  define XXH_swap32 __builtin_bswap32

-#else

-static inline U32 XXH_swap32 (U32 x) {

-    return  ((x << 24) & 0xff000000 ) |

-        ((x <<  8) & 0x00ff0000 ) |

-        ((x >>  8) & 0x0000ff00 ) |

-        ((x >> 24) & 0x000000ff );}

-#endif

-

-

-//**************************************

-// Constants

-//**************************************

-#define PRIME32_1   2654435761U

-#define PRIME32_2   2246822519U

-#define PRIME32_3   3266489917U

-#define PRIME32_4    668265263U

-#define PRIME32_5    374761393U

-

-

-//**************************************

-// 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;

-

-forceinline 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); 

-}

-

-forceinline U32 XXH_readLE32(const U32* ptr, XXH_endianess endian) { return XXH_readLE32_align(ptr, endian, XXH_unaligned); }

-

-

-//****************************

-// Simple Hash Functions

-//****************************

-forceinline U32 XXH32_endian_align(const void* input, int len, U32 seed, XXH_endianess endian, XXH_alignment align)

-{

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

-    const BYTE* const bEnd = p + len;

-    U32 h32;

-

-#ifdef XXH_ACCEPT_NULL_INPUT_POINTER

-    if (p==NULL) { len=0; 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_readLE32_align((const U32*)p, endian, align) * PRIME32_2; v1 = XXH_rotl32(v1, 13); v1 *= PRIME32_1; p+=4;

-            v2 += XXH_readLE32_align((const U32*)p, endian, align) * PRIME32_2; v2 = XXH_rotl32(v2, 13); v2 *= PRIME32_1; p+=4;

-            v3 += XXH_readLE32_align((const U32*)p, endian, align) * PRIME32_2; v3 = XXH_rotl32(v3, 13); v3 *= PRIME32_1; p+=4;

-            v4 += XXH_readLE32_align((const U32*)p, endian, align) * 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<=bEnd-4)

-    {

-        h32 += XXH_readLE32_align((const U32*)p, endian, align) * 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(const void* input, int len, U32 seed)

-{

-#if 0

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

-    void* state = XXH32_init(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))   // 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

-}

-

-

-//****************************

-// Advanced Hash Functions

-//****************************

-

-struct XXH_state32_t

-{

-    U64 total_len;

-    U32 seed;

-    U32 v1;

-    U32 v2;

-    U32 v3;

-    U32 v4;

-    int memsize;

-    char memory[16];

-};

-

-

-int XXH32_sizeofState(void)

-{

-    XXH_STATIC_ASSERT(XXH32_SIZEOFSTATE >= sizeof(struct XXH_state32_t));   // A compilation error here means XXH32_SIZEOFSTATE is not large enough

-    return sizeof(struct XXH_state32_t); 

-}

-

-

-XXH_errorcode XXH32_resetState(void* state_in, U32 seed)

-{ 

-    struct XXH_state32_t * state = (struct XXH_state32_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;

-}

-

-

-void* XXH32_init (U32 seed)

-{

-    void* state = XXH_malloc (sizeof(struct XXH_state32_t));

-    XXH32_resetState(state, seed);

-    return state;

-}

-

-

-forceinline XXH_errorcode XXH32_update_endian (void* state_in, const void* input, int len, XXH_endianess endian)

-{

-    struct XXH_state32_t * state = (struct XXH_state32_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 +=  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 (void* state_in, const void* input, int 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);

-}

-

-

-

-forceinline U32 XXH32_intermediateDigest_endian (void* state_in, XXH_endianess endian)

-{

-    struct XXH_state32_t * state = (struct XXH_state32_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<=bEnd-4)

-    {

-        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_intermediateDigest (void* state_in)

-{

-    XXH_endianess endian_detected = (XXH_endianess)XXH_CPU_LITTLE_ENDIAN;

-    

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

-        return XXH32_intermediateDigest_endian(state_in, XXH_littleEndian);

-    else

-        return XXH32_intermediateDigest_endian(state_in, XXH_bigEndian);

-}

-

-

-U32 XXH32_digest (void* state_in)

-{

-    U32 h32 = XXH32_intermediateDigest(state_in);

-

-    XXH_free(state_in);

-

-    return h32;

-}

diff --git a/src/ucl/src/xxhash.h b/src/ucl/src/xxhash.h
deleted file mode 100644
index b9f528828..000000000
--- a/src/ucl/src/xxhash.h
+++ /dev/null
@@ -1,164 +0,0 @@
-/*

-   xxHash - Fast Hash algorithm

-   Header File

-   Copyright (C) 2012-2013, 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/

-*/

-

-/* Notice extracted from xxHash homepage :

-

-xxHash is an extremely fast Hash algorithm, running at RAM speed limits.

-It also successfully passes all tests from the SMHasher suite.

-

-Comparison (single thread, Windows Seven 32 bits, using SMHasher on a Core 2 Duo @3GHz)

-

-Name            Speed       Q.Score   Author

-xxHash          5.4 GB/s     10

-CrapWow         3.2 GB/s      2       Andrew

-MumurHash 3a    2.7 GB/s     10       Austin Appleby

-SpookyHash      2.0 GB/s     10       Bob Jenkins

-SBox            1.4 GB/s      9       Bret Mulvey

-Lookup3         1.2 GB/s      9       Bob Jenkins

-SuperFastHash   1.2 GB/s      1       Paul Hsieh

-CityHash64      1.05 GB/s    10       Pike & Alakuijala

-FNV             0.55 GB/s     5       Fowler, Noll, Vo

-CRC32           0.43 GB/s     9

-MD5-32          0.33 GB/s    10       Ronald L. Rivest

-SHA1-32         0.28 GB/s    10

-

-Q.Score is a measure of quality of the hash function. 

-It depends on successfully passing SMHasher test set. 

-10 is a perfect score.

-*/

-

-#pragma once

-

-#if defined (__cplusplus)

-extern "C" {

-#endif

-

-

-//****************************

-// Type

-//****************************

-typedef enum { XXH_OK=0, XXH_ERROR } XXH_errorcode;

-

-

-

-//****************************

-// Simple Hash Functions

-//****************************

-

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

-

-/*

-XXH32() :

-    Calculate the 32-bits hash of sequence of length "len" stored at memory address "input".

-    The memory between input & input+len must be valid (allocated and read-accessible).

-    "seed" can be used to alter the result predictably.

-    This function successfully passes all SMHasher tests.

-    Speed on Core 2 Duo @ 3 GHz (single thread, SMHasher benchmark) : 5.4 GB/s

-    Note that "len" is type "int", which means it is limited to 2^31-1.

-    If your data is larger, use the advanced functions below.

-*/

-

-

-

-//****************************

-// Advanced Hash Functions

-//****************************

-

-void*         XXH32_init   (unsigned int seed);

-XXH_errorcode XXH32_update (void* state, const void* input, int len);

-unsigned int  XXH32_digest (void* state);

-

-/*

-These functions calculate the xxhash of an input provided in several small packets,

-as opposed to an input provided as a single block.

-

-It must be started with :

-void* XXH32_init()

-The function returns a pointer which holds the state of calculation.

-

-This pointer must be provided as "void* state" parameter for XXH32_update().

-XXH32_update() can be called as many times as necessary.

-The user must provide a valid (allocated) input.

-The function returns an error code, with 0 meaning OK, and any other value meaning there is an error.

-Note that "len" is type "int", which means it is limited to 2^31-1. 

-If your data is larger, it is recommended to chunk your data into blocks 

-of size for example 2^30 (1GB) to avoid any "int" overflow issue.

-

-Finally, you can end the calculation anytime, by using XXH32_digest().

-This function returns the final 32-bits hash.

-You must provide the same "void* state" parameter created by XXH32_init().

-Memory will be freed by XXH32_digest().

-*/

-

-

-int           XXH32_sizeofState(void);

-XXH_errorcode XXH32_resetState(void* state, unsigned int seed);

-

-#define       XXH32_SIZEOFSTATE 48

-typedef struct { long long ll[(XXH32_SIZEOFSTATE+(sizeof(long long)-1))/sizeof(long long)]; } XXH32_stateSpace_t;

-/*

-These functions allow user application to make its own allocation for state.

-

-XXH32_sizeofState() is used to know how much space must be allocated for the xxHash 32-bits state.

-Note that the state must be aligned to access 'long long' fields. Memory must be allocated and referenced by a pointer.

-This pointer must then be provided as 'state' into XXH32_resetState(), which initializes the state.

-

-For static allocation purposes (such as allocation on stack, or freestanding systems without malloc()),

-use the structure XXH32_stateSpace_t, which will ensure that memory space is large enough and correctly aligned to access 'long long' fields.

-*/

-

-

-unsigned int XXH32_intermediateDigest (void* state);

-/*

-This function does the same as XXH32_digest(), generating a 32-bit hash,

-but preserve memory context.

-This way, it becomes possible to generate intermediate hashes, and then continue feeding data with XXH32_update().

-To free memory context, use XXH32_digest(), or free().

-*/

-

-

-

-//****************************

-// Deprecated function names

-//****************************

-// The following translations are provided to ease code transition

-// You are encouraged to no longer this function names

-#define XXH32_feed   XXH32_update

-#define XXH32_result XXH32_digest

-#define XXH32_getIntermediateResult XXH32_intermediateDigest

-

-

-

-#if defined (__cplusplus)

-}

-#endif