mirror of
https://github.com/radareorg/radare2.git
synced 2024-12-14 08:49:50 +00:00
349 lines
10 KiB
C
349 lines
10 KiB
C
/*
|
|
xxHash - Fast Hash algorithm
|
|
Copyright (C) 2012, 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
|
|
//**************************************
|
|
// FORCE_NATIVE_FORMAT :
|
|
// By default, xxHash library provides endian-independent Hash values.
|
|
// Results are therefore identical for big-endian and little-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 to your application, you may uncomment the #define below
|
|
// It will improve speed for Big-endian CPU.
|
|
// This option has no impact on Little_Endian CPU.
|
|
//#define FORCE_NATIVE_FORMAT 1
|
|
|
|
|
|
|
|
//**************************************
|
|
// Includes
|
|
//**************************************
|
|
#include <stdlib.h> // for malloc(), free()
|
|
#include <string.h> // for memcpy()
|
|
#include "xxhash.h"
|
|
#include <r_types.h>
|
|
|
|
R_API ut32 r_hash_xxhash(const ut8 *buf, ut64 len) {
|
|
void *s = XXH32_init (0);
|
|
XXH32_feed (s, buf, (int)len);
|
|
return XXH32_result (s);
|
|
}
|
|
|
|
|
|
//**************************************
|
|
// CPU Feature Detection
|
|
//**************************************
|
|
// Little Endian or Big Endian ?
|
|
// You can overwrite the #define below if you know your architecture endianess
|
|
#if defined(FORCE_NATIVE_FORMAT) && (FORCE_NATIVE_FORMAT==1)
|
|
// Force native format. The result will be endian dependant.
|
|
# define XXH_BIG_ENDIAN 0
|
|
#elif defined (__GLIBC__)
|
|
# include <endian.h>
|
|
# if (__BYTE_ORDER == __BIG_ENDIAN)
|
|
# define XXH_BIG_ENDIAN 1
|
|
# endif
|
|
#elif (defined(__BIG_ENDIAN__) || defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN)) && !(defined(__LITTLE_ENDIAN__) || defined(__LITTLE_ENDIAN) || defined(_LITTLE_ENDIAN))
|
|
# define XXH_BIG_ENDIAN 1
|
|
#elif defined(__sparc) || defined(__sparc__) \
|
|
|| defined(__ppc__) || defined(_POWER) || defined(__powerpc__) || defined(_ARCH_PPC) || defined(__PPC__) || defined(__PPC) || defined(PPC) || defined(__powerpc__) || defined(__powerpc) || defined(powerpc) \
|
|
|| defined(__hpux) || defined(__hppa) \
|
|
|| defined(_MIPSEB) || defined(__s390__)
|
|
# define XXH_BIG_ENDIAN 1
|
|
#endif
|
|
|
|
#if !defined(XXH_BIG_ENDIAN)
|
|
// Little Endian assumed. PDP Endian and other very rare endian format are unsupported.
|
|
# define XXH_BIG_ENDIAN 0
|
|
#endif
|
|
|
|
|
|
|
|
//**************************************
|
|
// Compiler-specific Options & Functions
|
|
//**************************************
|
|
#define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
|
|
|
|
// Note : under GCC, it may sometimes be faster to enable the (2nd) macro definition, instead of using win32 intrinsic
|
|
#if defined(_WIN32)
|
|
# 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 unsigned int XXH_swap32 (unsigned int 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
|
|
|
|
|
|
|
|
//**************************************
|
|
// Macros
|
|
//**************************************
|
|
#define XXH_LE32(p) (XXH_BIG_ENDIAN ? XXH_swap32(*(unsigned int*)(p)) : *(unsigned int*)(p))
|
|
|
|
|
|
|
|
//****************************
|
|
// Simple Hash Functions
|
|
//****************************
|
|
|
|
unsigned int XXH32(const void* input, int len, unsigned int seed)
|
|
{
|
|
#if 0
|
|
// Simple version, good for code maintenance, but unfortunately slow for small inputs
|
|
void* state = XXH32_init(seed);
|
|
XXH32_feed(state, input, len);
|
|
return XXH32_result(state);
|
|
#else
|
|
|
|
const unsigned char* p = (const unsigned char*)input;
|
|
const unsigned char* const bEnd = p + len;
|
|
unsigned int h32;
|
|
|
|
if (len>=16)
|
|
{
|
|
const unsigned char* const limit = bEnd - 16;
|
|
unsigned int v1 = seed + PRIME32_1 + PRIME32_2;
|
|
unsigned int v2 = seed + PRIME32_2;
|
|
unsigned int v3 = seed + 0;
|
|
unsigned int v4 = seed - PRIME32_1;
|
|
|
|
do
|
|
{
|
|
v1 += XXH_LE32(p) * PRIME32_2; v1 = XXH_rotl32(v1, 13); v1 *= PRIME32_1; p+=4;
|
|
v2 += XXH_LE32(p) * PRIME32_2; v2 = XXH_rotl32(v2, 13); v2 *= PRIME32_1; p+=4;
|
|
v3 += XXH_LE32(p) * PRIME32_2; v3 = XXH_rotl32(v3, 13); v3 *= PRIME32_1; p+=4;
|
|
v4 += XXH_LE32(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 += (unsigned int) len;
|
|
|
|
while (p<=bEnd-4)
|
|
{
|
|
h32 += XXH_LE32(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;
|
|
|
|
#endif
|
|
}
|
|
|
|
|
|
//****************************
|
|
// Advanced Hash Functions
|
|
//****************************
|
|
|
|
struct XXH_state32_t
|
|
{
|
|
unsigned int seed;
|
|
unsigned int v1;
|
|
unsigned int v2;
|
|
unsigned int v3;
|
|
unsigned int v4;
|
|
unsigned long long total_len;
|
|
char memory[16];
|
|
int memsize;
|
|
};
|
|
|
|
|
|
void* XXH32_init (unsigned int seed)
|
|
{
|
|
struct XXH_state32_t * state = (struct XXH_state32_t *) malloc ( sizeof(struct XXH_state32_t));
|
|
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 (void*)state;
|
|
}
|
|
|
|
|
|
int XXH32_feed (void* state_in, const void* input, int len)
|
|
{
|
|
struct XXH_state32_t * state = state_in;
|
|
const unsigned char* p = (const unsigned char*)input;
|
|
const unsigned char* const bEnd = p + len;
|
|
|
|
state->total_len += len;
|
|
|
|
if (state->memsize + len < 16) // fill in tmp buffer
|
|
{
|
|
memcpy(state->memory + state->memsize, input, len);
|
|
state->memsize += len;
|
|
return 0;
|
|
}
|
|
|
|
if (state->memsize) // some data left from previous feed
|
|
{
|
|
memcpy(state->memory + state->memsize, input, 16-state->memsize);
|
|
{
|
|
const unsigned int* p32 = (const unsigned int*)state->memory;
|
|
state->v1 += XXH_LE32(p32) * PRIME32_2; state->v1 = XXH_rotl32(state->v1, 13); state->v1 *= PRIME32_1; p32++;
|
|
state->v2 += XXH_LE32(p32) * PRIME32_2; state->v2 = XXH_rotl32(state->v2, 13); state->v2 *= PRIME32_1; p32++;
|
|
state->v3 += XXH_LE32(p32) * PRIME32_2; state->v3 = XXH_rotl32(state->v3, 13); state->v3 *= PRIME32_1; p32++;
|
|
state->v4 += XXH_LE32(p32) * PRIME32_2; state->v4 = XXH_rotl32(state->v4, 13); state->v4 *= PRIME32_1; p32++;
|
|
}
|
|
p += 16-state->memsize;
|
|
state->memsize = 0;
|
|
}
|
|
|
|
{
|
|
const unsigned char* const limit = bEnd - 16;
|
|
unsigned int v1 = state->v1;
|
|
unsigned int v2 = state->v2;
|
|
unsigned int v3 = state->v3;
|
|
unsigned int v4 = state->v4;
|
|
|
|
while (p<=limit)
|
|
{
|
|
v1 += XXH_LE32(p) * PRIME32_2; v1 = XXH_rotl32(v1, 13); v1 *= PRIME32_1; p+=4;
|
|
v2 += XXH_LE32(p) * PRIME32_2; v2 = XXH_rotl32(v2, 13); v2 *= PRIME32_1; p+=4;
|
|
v3 += XXH_LE32(p) * PRIME32_2; v3 = XXH_rotl32(v3, 13); v3 *= PRIME32_1; p+=4;
|
|
v4 += XXH_LE32(p) * PRIME32_2; v4 = XXH_rotl32(v4, 13); v4 *= PRIME32_1; p+=4;
|
|
}
|
|
|
|
state->v1 = v1;
|
|
state->v2 = v2;
|
|
state->v3 = v3;
|
|
state->v4 = v4;
|
|
}
|
|
|
|
if (p < bEnd)
|
|
{
|
|
memcpy(state->memory, p, bEnd-p);
|
|
state->memsize = bEnd-p;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
unsigned int XXH32_getIntermediateResult (void* state_in)
|
|
{
|
|
struct XXH_state32_t * state = state_in;
|
|
unsigned char * p = (unsigned char*)state->memory;
|
|
unsigned char* bEnd = (unsigned char*)state->memory + state->memsize;
|
|
unsigned int 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 += (unsigned int) state->total_len;
|
|
|
|
while (p<=bEnd-4)
|
|
{
|
|
h32 += XXH_LE32(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_result (void* state_in)
|
|
{
|
|
unsigned int h32 = XXH32_getIntermediateResult(state_in);
|
|
|
|
free(state_in);
|
|
|
|
return h32;
|
|
}
|