From: Jens Axboe Date: Thu, 20 Feb 2014 21:29:42 +0000 (-0800) Subject: xxhash: dos2unix'ize X-Git-Tag: fio-2.1.6~21 X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=65f21d61d5d0796335ceb3320b8846e4d6d30ac7 xxhash: dos2unix'ize Signed-off-by: Jens Axboe --- diff --git a/crc/xxhash.c b/crc/xxhash.c index 6897de36..5190330e 100644 --- a/crc/xxhash.c +++ b/crc/xxhash.c @@ -1,425 +1,421 @@ -/* -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/ -*/ - - -//************************************** -// 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 uint32_t). -#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 related routines -// for malloc(), free() -#include -void* XXH_malloc(size_t s) { return malloc(s); } -void XXH_free (void* p) { free(p); } -// for memcpy() -#include -void* XXH_memcpy(void* dest, const void* src, size_t size) { return memcpy(dest,src,size); } - - -#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 _uint32_t_S { uint32_t v; } _PACKED uint32_t_S; - -#if !defined(XXH_USE_UNALIGNED_ACCESS) && !defined(__GNUC__) -# pragma pack(pop) -#endif - -#define A32(x) (((uint32_t_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 uint32_t XXH_swap32 (uint32_t 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; - -uint32_t XXH_readLE32_align(const uint32_t* 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); -} - -uint32_t XXH_readLE32(const uint32_t* ptr, XXH_endianess endian) { return XXH_readLE32_align(ptr, endian, XXH_unaligned); } - - -//**************************** -// Simple Hash Functions -//**************************** -uint32_t XXH32_endian_align(const void* input, int len, uint32_t seed, XXH_endianess endian, XXH_alignment align) -{ - const uint8_t *p = (const uint8_t *)input; - const uint8_t * const bEnd = p + len; - uint32_t h32; - -#ifdef XXH_ACCEPT_NULL_INPUT_POINTER - if (p==NULL) { len=0; p=(const uint8_t *)(size_t)16; } -#endif - - if (len>=16) - { - const uint8_t * const limit = bEnd - 16; - uint32_t v1 = seed + PRIME32_1 + PRIME32_2; - uint32_t v2 = seed + PRIME32_2; - uint32_t v3 = seed + 0; - uint32_t v4 = seed - PRIME32_1; - - do - { - v1 += XXH_readLE32_align((const uint32_t*)p, endian, align) * PRIME32_2; v1 = XXH_rotl32(v1, 13); v1 *= PRIME32_1; p+=4; - v2 += XXH_readLE32_align((const uint32_t*)p, endian, align) * PRIME32_2; v2 = XXH_rotl32(v2, 13); v2 *= PRIME32_1; p+=4; - v3 += XXH_readLE32_align((const uint32_t*)p, endian, align) * PRIME32_2; v3 = XXH_rotl32(v3, 13); v3 *= PRIME32_1; p+=4; - v4 += XXH_readLE32_align((const uint32_t*)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 += (uint32_t) len; - - while (p<=bEnd-4) - { - h32 += XXH_readLE32_align((const uint32_t*)p, endian, align) * PRIME32_3; - h32 = XXH_rotl32(h32, 17) * PRIME32_4 ; - p+=4; - } - - while (p> 15; - h32 *= PRIME32_2; - h32 ^= h32 >> 13; - h32 *= PRIME32_3; - h32 ^= h32 >> 16; - - return h32; -} - - -uint32_t XXH32(const void* input, int len, uint32_t 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 -//**************************** - -int XXH32_sizeofState() -{ - 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, uint32_t 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 (uint32_t seed) -{ - void* state = XXH_malloc (sizeof(struct XXH_state32_t)); - XXH32_resetState(state, seed); - return state; -} - - -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 uint8_t *p = (const uint8_t *)input; - const uint8_t * 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 uint32_t* p32 = (const uint32_t*)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 uint8_t * const limit = bEnd - 16; - uint32_t v1 = state->v1; - uint32_t v2 = state->v2; - uint32_t v3 = state->v3; - uint32_t v4 = state->v4; - - do - { - v1 += XXH_readLE32((const uint32_t*)p, endian) * PRIME32_2; v1 = XXH_rotl32(v1, 13); v1 *= PRIME32_1; p+=4; - v2 += XXH_readLE32((const uint32_t*)p, endian) * PRIME32_2; v2 = XXH_rotl32(v2, 13); v2 *= PRIME32_1; p+=4; - v3 += XXH_readLE32((const uint32_t*)p, endian) * PRIME32_2; v3 = XXH_rotl32(v3, 13); v3 *= PRIME32_1; p+=4; - v4 += XXH_readLE32((const uint32_t*)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); -} - - - -uint32_t XXH32_intermediateDigest_endian (void* state_in, XXH_endianess endian) -{ - struct XXH_state32_t * state = (struct XXH_state32_t *) state_in; - const uint8_t *p = (const uint8_t *)state->memory; - uint8_t * bEnd = (uint8_t *)state->memory + state->memsize; - uint32_t 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 += (uint32_t) state->total_len; - - while (p<=bEnd-4) - { - h32 += XXH_readLE32((const uint32_t*)p, endian) * PRIME32_3; - h32 = XXH_rotl32(h32, 17) * PRIME32_4; - p+=4; - } - - while (p> 15; - h32 *= PRIME32_2; - h32 ^= h32 >> 13; - h32 *= PRIME32_3; - h32 ^= h32 >> 16; - - return h32; -} - - -uint32_t 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); -} - - -uint32_t XXH32_digest (void* state_in) -{ - uint32_t h32 = XXH32_intermediateDigest(state_in); - - XXH_free(state_in); - - return h32; -} +/* +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/ +*/ + + +//************************************** +// 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 uint32_t). +#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" +#include +#include + + +#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 _uint32_t_S { uint32_t v; } _PACKED uint32_t_S; + +#if !defined(XXH_USE_UNALIGNED_ACCESS) && !defined(__GNUC__) +# pragma pack(pop) +#endif + +#define A32(x) (((uint32_t_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 uint32_t XXH_swap32 (uint32_t 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; + +uint32_t XXH_readLE32_align(const uint32_t* 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); +} + +uint32_t XXH_readLE32(const uint32_t* ptr, XXH_endianess endian) { return XXH_readLE32_align(ptr, endian, XXH_unaligned); } + + +//**************************** +// Simple Hash Functions +//**************************** +uint32_t XXH32_endian_align(const void* input, int len, uint32_t seed, XXH_endianess endian, XXH_alignment align) +{ + const uint8_t *p = (const uint8_t *)input; + const uint8_t * const bEnd = p + len; + uint32_t h32; + +#ifdef XXH_ACCEPT_NULL_INPUT_POINTER + if (p==NULL) { len=0; p=(const uint8_t *)(size_t)16; } +#endif + + if (len>=16) + { + const uint8_t * const limit = bEnd - 16; + uint32_t v1 = seed + PRIME32_1 + PRIME32_2; + uint32_t v2 = seed + PRIME32_2; + uint32_t v3 = seed + 0; + uint32_t v4 = seed - PRIME32_1; + + do + { + v1 += XXH_readLE32_align((const uint32_t*)p, endian, align) * PRIME32_2; v1 = XXH_rotl32(v1, 13); v1 *= PRIME32_1; p+=4; + v2 += XXH_readLE32_align((const uint32_t*)p, endian, align) * PRIME32_2; v2 = XXH_rotl32(v2, 13); v2 *= PRIME32_1; p+=4; + v3 += XXH_readLE32_align((const uint32_t*)p, endian, align) * PRIME32_2; v3 = XXH_rotl32(v3, 13); v3 *= PRIME32_1; p+=4; + v4 += XXH_readLE32_align((const uint32_t*)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 += (uint32_t) len; + + while (p<=bEnd-4) + { + h32 += XXH_readLE32_align((const uint32_t*)p, endian, align) * PRIME32_3; + h32 = XXH_rotl32(h32, 17) * PRIME32_4 ; + p+=4; + } + + while (p> 15; + h32 *= PRIME32_2; + h32 ^= h32 >> 13; + h32 *= PRIME32_3; + h32 ^= h32 >> 16; + + return h32; +} + + +uint32_t XXH32(const void* input, int len, uint32_t 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 +//**************************** + +int XXH32_sizeofState() +{ + 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, uint32_t 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 (uint32_t seed) +{ + void *state = malloc (sizeof(struct XXH_state32_t)); + XXH32_resetState(state, seed); + return state; +} + + +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 uint8_t *p = (const uint8_t *)input; + const uint8_t * 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 + { + memcpy(state->memory + state->memsize, input, len); + state->memsize += len; + return XXH_OK; + } + + if (state->memsize) // some data left from previous update + { + memcpy(state->memory + state->memsize, input, 16-state->memsize); + { + const uint32_t* p32 = (const uint32_t*)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 uint8_t * const limit = bEnd - 16; + uint32_t v1 = state->v1; + uint32_t v2 = state->v2; + uint32_t v3 = state->v3; + uint32_t v4 = state->v4; + + do + { + v1 += XXH_readLE32((const uint32_t*)p, endian) * PRIME32_2; v1 = XXH_rotl32(v1, 13); v1 *= PRIME32_1; p+=4; + v2 += XXH_readLE32((const uint32_t*)p, endian) * PRIME32_2; v2 = XXH_rotl32(v2, 13); v2 *= PRIME32_1; p+=4; + v3 += XXH_readLE32((const uint32_t*)p, endian) * PRIME32_2; v3 = XXH_rotl32(v3, 13); v3 *= PRIME32_1; p+=4; + v4 += XXH_readLE32((const uint32_t*)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) + { + 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); +} + + + +uint32_t XXH32_intermediateDigest_endian (void* state_in, XXH_endianess endian) +{ + struct XXH_state32_t * state = (struct XXH_state32_t *) state_in; + const uint8_t *p = (const uint8_t *)state->memory; + uint8_t * bEnd = (uint8_t *)state->memory + state->memsize; + uint32_t 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 += (uint32_t) state->total_len; + + while (p<=bEnd-4) + { + h32 += XXH_readLE32((const uint32_t*)p, endian) * PRIME32_3; + h32 = XXH_rotl32(h32, 17) * PRIME32_4; + p+=4; + } + + while (p> 15; + h32 *= PRIME32_2; + h32 ^= h32 >> 13; + h32 *= PRIME32_3; + h32 ^= h32 >> 16; + + return h32; +} + + +uint32_t 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); +} + + +uint32_t XXH32_digest (void* state_in) +{ + uint32_t h32 = XXH32_intermediateDigest(state_in); + + free(state_in); + + return h32; +} diff --git a/crc/xxhash.h b/crc/xxhash.h index 4c7aafeb..bcd060e7 100644 --- a/crc/xxhash.h +++ b/crc/xxhash.h @@ -1,177 +1,177 @@ -/* - xxHash - Fast Hash algorithm - Header File - 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/ -*/ - -/* 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 - -#include - -struct XXH_state32_t -{ - uint64_t total_len; - uint32_t seed; - uint32_t v1; - uint32_t v2; - uint32_t v3; - uint32_t v4; - int memsize; - char memory[16]; -}; - -//**************************** -// 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(); -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 +/* + xxHash - Fast Hash algorithm + Header File + 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/ +*/ + +/* 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 + +#include + +struct XXH_state32_t +{ + uint64_t total_len; + uint32_t seed; + uint32_t v1; + uint32_t v2; + uint32_t v3; + uint32_t v4; + int memsize; + char memory[16]; +}; + +//**************************** +// 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(); +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