ReactOS 0.4.15-dev-8191-gbc6c731
xxhash.c File Reference
#include <stdlib.h>
#include <stddef.h>
#include <ntifs.h>
#include <ntddk.h>
#include <string.h>
#include "xxhash.h"
Include dependency graph for xxhash.c:

Go to the source code of this file.

Macros

#define XXH_FORCE_NATIVE_FORMAT   0
 
#define XXH_FORCE_ALIGN_CHECK   1
 
#define XXH_ALLOC_TAG   0x32485858
 
#define XXH_STATIC_LINKING_ONLY
 
#define INLINE_KEYWORD
 
#define FORCE_INLINE_ATTR
 
#define FORCE_INLINE_TEMPLATE   static INLINE_KEYWORD FORCE_INLINE_ATTR
 
#define MEM_MODULE
 
#define GCC_VERSION   (__GNUC__ * 100 + __GNUC_MINOR__)
 
#define XXH_rotl32(x, r)   ((x << r) | (x >> (32 - r)))
 
#define XXH_rotl64(x, r)   ((x << r) | (x >> (64 - r)))
 
#define XXH_CPU_LITTLE_ENDIAN   (*(const char*)(&g_one))
 
#define XXH_STATIC_ASSERT(c)   { enum { XXH_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */
 
#define XXH_get32bits(p)   XXH_readLE32_align(p, endian, align)
 
#define XXH_get64bits(p)   XXH_readLE64_align(p, endian, align)
 

Typedefs

typedef unsigned char BYTE
 
typedef unsigned short U16
 
typedef unsigned int U32
 
typedef signed int S32
 
typedef unsigned long long U64
 

Enumerations

enum  XXH_endianess { XXH_bigEndian =0 , XXH_littleEndian =1 }
 
enum  XXH_alignment { XXH_aligned , XXH_unaligned }
 

Functions

static voidXXH_malloc (size_t s)
 
static void XXH_free (void *p)
 
static voidXXH_memcpy (void *dest, const void *src, size_t size)
 
static U32 XXH_read32 (const void *memPtr)
 
static U64 XXH_read64 (const void *memPtr)
 
static U32 XXH_swap32 (U32 x)
 
static U64 XXH_swap64 (U64 x)
 
FORCE_INLINE_TEMPLATE U32 XXH_readLE32_align (const void *ptr, XXH_endianess endian, XXH_alignment align)
 
FORCE_INLINE_TEMPLATE U32 XXH_readLE32 (const void *ptr, XXH_endianess endian)
 
static U32 XXH_readBE32 (const void *ptr)
 
FORCE_INLINE_TEMPLATE U64 XXH_readLE64_align (const void *ptr, XXH_endianess endian, XXH_alignment align)
 
FORCE_INLINE_TEMPLATE U64 XXH_readLE64 (const void *ptr, XXH_endianess endian)
 
static U64 XXH_readBE64 (const void *ptr)
 
XXH_PUBLIC_API unsigned XXH_versionNumber (void)
 
XXH_PUBLIC_API void XXH32_copyState (XXH32_state_t *restrict dstState, const XXH32_state_t *restrict srcState)
 
XXH_PUBLIC_API void XXH64_copyState (XXH64_state_t *restrict dstState, const XXH64_state_t *restrict srcState)
 
static U32 XXH32_round (U32 seed, U32 input)
 
FORCE_INLINE_TEMPLATE U32 XXH32_endian_align (const void *input, size_t len, U32 seed, XXH_endianess endian, XXH_alignment align)
 
XXH_PUBLIC_API unsigned int XXH32 (const void *input, size_t len, unsigned int seed)
 
static U64 XXH64_round (U64 acc, U64 input)
 
static U64 XXH64_mergeRound (U64 acc, U64 val)
 
FORCE_INLINE_TEMPLATE U64 XXH64_endian_align (const void *input, size_t len, U64 seed, XXH_endianess endian, XXH_alignment align)
 
XXH_PUBLIC_API unsigned long long XXH64 (const void *input, size_t len, unsigned long long seed)
 
XXH_PUBLIC_API XXH32_state_tXXH32_createState (void)
 
XXH_PUBLIC_API XXH_errorcode XXH32_freeState (XXH32_state_t *statePtr)
 
XXH_PUBLIC_API XXH64_state_tXXH64_createState (void)
 
XXH_PUBLIC_API XXH_errorcode XXH64_freeState (XXH64_state_t *statePtr)
 
XXH_PUBLIC_API XXH_errorcode XXH32_reset (XXH32_state_t *statePtr, unsigned int seed)
 
XXH_PUBLIC_API XXH_errorcode XXH64_reset (XXH64_state_t *statePtr, unsigned long long seed)
 
FORCE_INLINE_TEMPLATE XXH_errorcode XXH32_update_endian (XXH32_state_t *state, const void *input, size_t len, XXH_endianess endian)
 
XXH_PUBLIC_API XXH_errorcode XXH32_update (XXH32_state_t *state_in, const void *input, size_t len)
 
FORCE_INLINE_TEMPLATE U32 XXH32_digest_endian (const XXH32_state_t *state, XXH_endianess endian)
 
XXH_PUBLIC_API unsigned int XXH32_digest (const XXH32_state_t *state_in)
 
FORCE_INLINE_TEMPLATE XXH_errorcode XXH64_update_endian (XXH64_state_t *state, const void *input, size_t len, XXH_endianess endian)
 
XXH_PUBLIC_API XXH_errorcode XXH64_update (XXH64_state_t *state_in, const void *input, size_t len)
 
FORCE_INLINE_TEMPLATE U64 XXH64_digest_endian (const XXH64_state_t *state, XXH_endianess endian)
 
XXH_PUBLIC_API unsigned long long XXH64_digest (const XXH64_state_t *state_in)
 
XXH_PUBLIC_API void XXH32_canonicalFromHash (XXH32_canonical_t *dst, XXH32_hash_t hash)
 
XXH_PUBLIC_API void XXH64_canonicalFromHash (XXH64_canonical_t *dst, XXH64_hash_t hash)
 
XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical (const XXH32_canonical_t *src)
 
XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical (const XXH64_canonical_t *src)
 

Variables

static const int g_one = 1
 
static const U32 PRIME32_1 = 2654435761U
 
static const U32 PRIME32_2 = 2246822519U
 
static const U32 PRIME32_3 = 3266489917U
 
static const U32 PRIME32_4 = 668265263U
 
static const U32 PRIME32_5 = 374761393U
 
static const U64 PRIME64_1 = 11400714785074694791ULL
 
static const U64 PRIME64_2 = 14029467366897019727ULL
 
static const U64 PRIME64_3 = 1609587929392839161ULL
 
static const U64 PRIME64_4 = 9650029242287828579ULL
 
static const U64 PRIME64_5 = 2870177450012600261ULL
 

Macro Definition Documentation

◆ FORCE_INLINE_ATTR

#define FORCE_INLINE_ATTR

Definition at line 169 of file xxhash.c.

◆ FORCE_INLINE_TEMPLATE

#define FORCE_INLINE_TEMPLATE   static INLINE_KEYWORD FORCE_INLINE_ATTR

Definition at line 172 of file xxhash.c.

◆ GCC_VERSION

#define GCC_VERSION   (__GNUC__ * 100 + __GNUC_MINOR__)

Definition at line 243 of file xxhash.c.

◆ INLINE_KEYWORD

#define INLINE_KEYWORD

Definition at line 161 of file xxhash.c.

◆ MEM_MODULE

#define MEM_MODULE

Definition at line 184 of file xxhash.c.

◆ XXH_ALLOC_TAG

#define XXH_ALLOC_TAG   0x32485858

Definition at line 113 of file xxhash.c.

◆ XXH_CPU_LITTLE_ENDIAN

#define XXH_CPU_LITTLE_ENDIAN   (*(const char*)(&g_one))

Definition at line 290 of file xxhash.c.

◆ XXH_FORCE_ALIGN_CHECK

#define XXH_FORCE_ALIGN_CHECK   1

XXH_FORCE_ALIGN_CHECK : This is a minor performance trick, only useful with lots of very small keys. It means : check for aligned/unaligned input. The check costs one initial branch per hash; set to 0 when the input data is guaranteed to be aligned.

Definition at line 90 of file xxhash.c.

◆ XXH_FORCE_NATIVE_FORMAT

#define XXH_FORCE_NATIVE_FORMAT   0

XXH_FORCE_MEMORY_ACCESS : By default, access to unaligned memory is controlled by memcpy(), which is safe and portable. Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal. The below switch allow to select different access method for improved performance. Method 0 (default) : use memcpy(). Safe and portable. Method 1 : __packed statement. It depends on compiler extension (ie, not portable). This method is safe if your compiler supports it, and generally as fast or faster than memcpy. Method 2 : direct access. This method doesn't depend on compiler but violate C standard. It can generate buggy code on targets which do not support unaligned memory accesses. But in some circumstances, it's the only known way to get the most performance (ie GCC + ARMv6) See http://stackoverflow.com/a/32095106/646947 for details. Prefer these methods in priority order (0 > 1 > 2)

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

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, to improve speed for Big-endian CPU. This option has no impact on Little_Endian CPU.

Definition at line 77 of file xxhash.c.

◆ XXH_get32bits

#define XXH_get32bits (   p)    XXH_readLE32_align(p, endian, align)

◆ XXH_get64bits

#define XXH_get64bits (   p)    XXH_readLE64_align(p, endian, align)

◆ XXH_rotl32

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

Definition at line 250 of file xxhash.c.

◆ XXH_rotl64

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

Definition at line 251 of file xxhash.c.

◆ XXH_STATIC_ASSERT

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

Definition at line 339 of file xxhash.c.

◆ XXH_STATIC_LINKING_ONLY

#define XXH_STATIC_LINKING_ONLY

Definition at line 150 of file xxhash.c.

Typedef Documentation

◆ BYTE

typedef BYTE

Definition at line 193 of file xxhash.c.

◆ S32

typedef signed int S32

Definition at line 196 of file xxhash.c.

◆ U16

typedef unsigned short U16

Definition at line 194 of file xxhash.c.

◆ U32

typedef unsigned int U32

Definition at line 195 of file xxhash.c.

◆ U64

typedef unsigned long long U64

Definition at line 197 of file xxhash.c.

Enumeration Type Documentation

◆ XXH_alignment

Enumerator
XXH_aligned 
XXH_unaligned 

Definition at line 297 of file xxhash.c.

XXH_alignment
Definition: xxhash.c:297
@ XXH_aligned
Definition: xxhash.c:297
@ XXH_unaligned
Definition: xxhash.c:297

◆ XXH_endianess

Enumerator
XXH_bigEndian 
XXH_littleEndian 

Definition at line 285 of file xxhash.c.

XXH_endianess
Definition: xxhash.c:285
@ XXH_littleEndian
Definition: xxhash.c:285
@ XXH_bigEndian
Definition: xxhash.c:285

Function Documentation

◆ XXH32()

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

Definition at line 443 of file xxhash.c.

444{
445#if 0
446 /* Simple version, good for code maintenance, but unfortunately slow for small inputs */
447 XXH32_CREATESTATE_STATIC(state);
448 XXH32_reset(state, seed);
450 return XXH32_digest(state);
451#else
453
455 if ((((size_t)input) & 3) == 0) { /* Input is 4-bytes aligned, leverage the speed benefit */
456 if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
458 else
460 } }
461
462 if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
464 else
466#endif
467}
static int state
Definition: maze.c:121
GLenum GLsizei len
Definition: glext.h:6722
GLenum GLenum GLenum input
Definition: glext.h:9031
XXH_PUBLIC_API unsigned int XXH32_digest(const XXH32_state_t *state_in)
Definition: xxhash.c:741
#define XXH_CPU_LITTLE_ENDIAN
Definition: xxhash.c:290
XXH_PUBLIC_API XXH_errorcode XXH32_reset(XXH32_state_t *statePtr, unsigned int seed)
Definition: xxhash.c:609
FORCE_INLINE_TEMPLATE U32 XXH32_endian_align(const void *input, size_t len, U32 seed, XXH_endianess endian, XXH_alignment align)
Definition: xxhash.c:386
#define XXH_FORCE_ALIGN_CHECK
Definition: xxhash.c:90
XXH_PUBLIC_API XXH_errorcode XXH32_update(XXH32_state_t *state_in, const void *input, size_t len)
Definition: xxhash.c:693
#define XXH_FORCE_NATIVE_FORMAT
Definition: xxhash.c:77

◆ XXH32_canonicalFromHash()

XXH_PUBLIC_API void XXH32_canonicalFromHash ( XXH32_canonical_t dst,
XXH32_hash_t  hash 
)

Default XXH result types are basic unsigned 32 and 64 bits. The canonical representation follows human-readable write convention, aka big-endian (large digits first). These functions allow transformation of hash result into and from its canonical format. This way, hash values can be written into a file or buffer, and remain comparable across different systems and programs.

Definition at line 895 of file xxhash.c.

896{
899 memcpy(dst, &hash, sizeof(*dst));
900}
GLenum GLenum dst
Definition: glext.h:6340
#define memcpy(s1, s2, n)
Definition: mkisofs.h:878
Definition: _hash_fun.h:40
#define XXH_STATIC_ASSERT(c)
Definition: xxhash.c:339
static U32 XXH_swap32(U32 x)
Definition: xxhash.c:261
unsigned int XXH32_hash_t
Definition: xxhash.h:160

◆ XXH32_copyState()

XXH_PUBLIC_API void XXH32_copyState ( XXH32_state_t *restrict  dstState,
const XXH32_state_t *restrict  srcState 
)

Definition at line 363 of file xxhash.c.

364{
365 memcpy(dstState, srcState, sizeof(*dstState));
366}

◆ XXH32_createState()

XXH_PUBLIC_API XXH32_state_t * XXH32_createState ( void  )

State allocation, compatible with dynamic libraries

Definition at line 586 of file xxhash.c.

587{
588 return (XXH32_state_t*)XXH_malloc(sizeof(XXH32_state_t));
589}
static void * XXH_malloc(size_t s)
Definition: xxhash.c:115
struct XXH32_state_s XXH32_state_t
Definition: xxhash.h:182

◆ XXH32_digest()

XXH_PUBLIC_API unsigned int XXH32_digest ( const XXH32_state_t state_in)

Definition at line 741 of file xxhash.c.

742{
744
745 if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
746 return XXH32_digest_endian(state_in, XXH_littleEndian);
747 else
748 return XXH32_digest_endian(state_in, XXH_bigEndian);
749}
FORCE_INLINE_TEMPLATE U32 XXH32_digest_endian(const XXH32_state_t *state, XXH_endianess endian)
Definition: xxhash.c:705

Referenced by XXH32().

◆ XXH32_digest_endian()

FORCE_INLINE_TEMPLATE U32 XXH32_digest_endian ( const XXH32_state_t state,
XXH_endianess  endian 
)

Definition at line 705 of file xxhash.c.

706{
707 const BYTE * p = (const BYTE*)state->mem32;
708 const BYTE* const bEnd = (const BYTE*)(state->mem32) + state->memsize;
709 U32 h32;
710
711 if (state->large_len) {
712 h32 = XXH_rotl32(state->v1, 1) + XXH_rotl32(state->v2, 7) + XXH_rotl32(state->v3, 12) + XXH_rotl32(state->v4, 18);
713 } else {
714 h32 = state->v3 /* == seed */ + PRIME32_5;
715 }
716
717 h32 += state->total_len_32;
718
719 while (p+4<=bEnd) {
720 h32 += XXH_readLE32(p, endian) * PRIME32_3;
721 h32 = XXH_rotl32(h32, 17) * PRIME32_4;
722 p+=4;
723 }
724
725 while (p<bEnd) {
726 h32 += (*p) * PRIME32_5;
727 h32 = XXH_rotl32(h32, 11) * PRIME32_1;
728 p++;
729 }
730
731 h32 ^= h32 >> 15;
732 h32 *= PRIME32_2;
733 h32 ^= h32 >> 13;
734 h32 *= PRIME32_3;
735 h32 ^= h32 >> 16;
736
737 return h32;
738}
GLfloat GLfloat p
Definition: glext.h:8902
if(dx< 0)
Definition: linetemp.h:194
FORCE_INLINE_TEMPLATE U32 XXH_readLE32(const void *ptr, XXH_endianess endian)
Definition: xxhash.c:307
static const U32 PRIME32_5
Definition: xxhash.c:349
static const U32 PRIME32_1
Definition: xxhash.c:345
#define XXH_rotl32(x, r)
Definition: xxhash.c:250
static const U32 PRIME32_2
Definition: xxhash.c:346
static const U32 PRIME32_3
Definition: xxhash.c:347
unsigned char BYTE
Definition: xxhash.c:193
unsigned int U32
Definition: xxhash.c:195
static const U32 PRIME32_4
Definition: xxhash.c:348

Referenced by XXH32_digest().

◆ XXH32_endian_align()

FORCE_INLINE_TEMPLATE U32 XXH32_endian_align ( const void input,
size_t  len,
U32  seed,
XXH_endianess  endian,
XXH_alignment  align 
)

Definition at line 386 of file xxhash.c.

387{
388 const BYTE* p = (const BYTE*)input;
389 const BYTE* bEnd = p + len;
390 U32 h32;
391#define XXH_get32bits(p) XXH_readLE32_align(p, endian, align)
392
393#ifdef XXH_ACCEPT_NULL_INPUT_POINTER
394 if (p==NULL) {
395 len=0;
396 bEnd=p=(const BYTE*)(size_t)16;
397 }
398#endif
399
400 if (len>=16) {
401 const BYTE* const limit = bEnd - 16;
402 U32 v1 = seed + PRIME32_1 + PRIME32_2;
403 U32 v2 = seed + PRIME32_2;
404 U32 v3 = seed + 0;
405 U32 v4 = seed - PRIME32_1;
406
407 do {
408 v1 = XXH32_round(v1, XXH_get32bits(p)); p+=4;
409 v2 = XXH32_round(v2, XXH_get32bits(p)); p+=4;
410 v3 = XXH32_round(v3, XXH_get32bits(p)); p+=4;
411 v4 = XXH32_round(v4, XXH_get32bits(p)); p+=4;
412 } while (p<=limit);
413
414 h32 = XXH_rotl32(v1, 1) + XXH_rotl32(v2, 7) + XXH_rotl32(v3, 12) + XXH_rotl32(v4, 18);
415 } else {
416 h32 = seed + PRIME32_5;
417 }
418
419 h32 += (U32) len;
420
421 while (p+4<=bEnd) {
422 h32 += XXH_get32bits(p) * PRIME32_3;
423 h32 = XXH_rotl32(h32, 17) * PRIME32_4 ;
424 p+=4;
425 }
426
427 while (p<bEnd) {
428 h32 += (*p) * PRIME32_5;
429 h32 = XXH_rotl32(h32, 11) * PRIME32_1 ;
430 p++;
431 }
432
433 h32 ^= h32 >> 15;
434 h32 *= PRIME32_2;
435 h32 ^= h32 >> 13;
436 h32 *= PRIME32_3;
437 h32 ^= h32 >> 16;
438
439 return h32;
440}
#define NULL
Definition: types.h:112
GLint limit
Definition: glext.h:10326
GLfloat GLfloat GLfloat GLfloat v3
Definition: glext.h:6064
GLfloat GLfloat v1
Definition: glext.h:6062
GLfloat GLfloat GLfloat v2
Definition: glext.h:6063
static U32 XXH32_round(U32 seed, U32 input)
Definition: xxhash.c:378
#define XXH_get32bits(p)

Referenced by XXH32().

◆ XXH32_freeState()

XXH_PUBLIC_API XXH_errorcode XXH32_freeState ( XXH32_state_t statePtr)

Definition at line 590 of file xxhash.c.

591{
592 XXH_free(statePtr);
593 return XXH_OK;
594}
static void XXH_free(void *p)
Definition: xxhash.c:119
@ XXH_OK
Definition: xxhash.h:79

◆ XXH32_hashFromCanonical()

XXH_PUBLIC_API XXH32_hash_t XXH32_hashFromCanonical ( const XXH32_canonical_t src)

Definition at line 909 of file xxhash.c.

910{
911 return XXH_readBE32(src);
912}
GLenum src
Definition: glext.h:6340
static U32 XXH_readBE32(const void *ptr)
Definition: xxhash.c:312

◆ XXH32_reset()

XXH_PUBLIC_API XXH_errorcode XXH32_reset ( XXH32_state_t statePtr,
unsigned int  seed 
)

Definition at line 609 of file xxhash.c.

610{
611 XXH32_state_t state; /* using a local state to memcpy() in order to avoid strict-aliasing warnings */
612 memset(&state, 0, sizeof(state)-4); /* do not write into reserved, for future removal */
613 state.v1 = seed + PRIME32_1 + PRIME32_2;
614 state.v2 = seed + PRIME32_2;
615 state.v3 = seed + 0;
616 state.v4 = seed - PRIME32_1;
617 memcpy(statePtr, &state, sizeof(state));
618 return XXH_OK;
619}
#define memset(x, y, z)
Definition: compat.h:39

Referenced by XXH32().

◆ XXH32_round()

static U32 XXH32_round ( U32  seed,
U32  input 
)
static

Definition at line 378 of file xxhash.c.

379{
380 seed += input * PRIME32_2;
381 seed = XXH_rotl32(seed, 13);
382 seed *= PRIME32_1;
383 return seed;
384}

Referenced by XXH32_endian_align(), and XXH32_update_endian().

◆ XXH32_update()

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

Definition at line 693 of file xxhash.c.

694{
696
697 if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
698 return XXH32_update_endian(state_in, input, len, XXH_littleEndian);
699 else
700 return XXH32_update_endian(state_in, input, len, XXH_bigEndian);
701}
FORCE_INLINE_TEMPLATE XXH_errorcode XXH32_update_endian(XXH32_state_t *state, const void *input, size_t len, XXH_endianess endian)
Definition: xxhash.c:635

Referenced by XXH32().

◆ XXH32_update_endian()

FORCE_INLINE_TEMPLATE XXH_errorcode XXH32_update_endian ( XXH32_state_t state,
const void input,
size_t  len,
XXH_endianess  endian 
)

Definition at line 635 of file xxhash.c.

636{
637 const BYTE* p = (const BYTE*)input;
638 const BYTE* const bEnd = p + len;
639
640#ifdef XXH_ACCEPT_NULL_INPUT_POINTER
641 if (input==NULL) return XXH_ERROR;
642#endif
643
644 state->total_len_32 += (unsigned)len;
645 state->large_len |= (len>=16) | (state->total_len_32>=16);
646
647 if (state->memsize + len < 16) { /* fill in tmp buffer */
648 XXH_memcpy((BYTE*)(state->mem32) + state->memsize, input, len);
649 state->memsize += (unsigned)len;
650 return XXH_OK;
651 }
652
653 if (state->memsize) { /* some data left from previous update */
654 XXH_memcpy((BYTE*)(state->mem32) + state->memsize, input, 16-state->memsize);
655 { const U32* p32 = state->mem32;
656 state->v1 = XXH32_round(state->v1, XXH_readLE32(p32, endian)); p32++;
657 state->v2 = XXH32_round(state->v2, XXH_readLE32(p32, endian)); p32++;
658 state->v3 = XXH32_round(state->v3, XXH_readLE32(p32, endian)); p32++;
659 state->v4 = XXH32_round(state->v4, XXH_readLE32(p32, endian)); p32++;
660 }
661 p += 16-state->memsize;
662 state->memsize = 0;
663 }
664
665 if (p <= bEnd-16) {
666 const BYTE* const limit = bEnd - 16;
667 U32 v1 = state->v1;
668 U32 v2 = state->v2;
669 U32 v3 = state->v3;
670 U32 v4 = state->v4;
671
672 do {
673 v1 = XXH32_round(v1, XXH_readLE32(p, endian)); p+=4;
674 v2 = XXH32_round(v2, XXH_readLE32(p, endian)); p+=4;
675 v3 = XXH32_round(v3, XXH_readLE32(p, endian)); p+=4;
676 v4 = XXH32_round(v4, XXH_readLE32(p, endian)); p+=4;
677 } while (p<=limit);
678
679 state->v1 = v1;
680 state->v2 = v2;
681 state->v3 = v3;
682 state->v4 = v4;
683 }
684
685 if (p < bEnd) {
686 XXH_memcpy(state->mem32, p, (size_t)(bEnd-p));
687 state->memsize = (unsigned)(bEnd-p);
688 }
689
690 return XXH_OK;
691}
static unsigned(__cdecl *hash_bstr)(bstr_t s)
static void * XXH_memcpy(void *dest, const void *src, size_t size)
Definition: xxhash.c:147
@ XXH_ERROR
Definition: xxhash.h:79

Referenced by XXH32_update().

◆ XXH64()

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

Definition at line 555 of file xxhash.c.

556{
557#if 0
558 /* Simple version, good for code maintenance, but unfortunately slow for small inputs */
559 XXH64_CREATESTATE_STATIC(state);
560 XXH64_reset(state, seed);
562 return XXH64_digest(state);
563#else
565
567 if ((((size_t)input) & 7)==0) { /* Input is aligned, let's leverage the speed advantage */
568 if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
570 else
572 } }
573
574 if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
576 else
578#endif
579}
XXH_PUBLIC_API XXH_errorcode XXH64_update(XXH64_state_t *state_in, const void *input, size_t len)
Definition: xxhash.c:810
XXH_PUBLIC_API XXH_errorcode XXH64_reset(XXH64_state_t *statePtr, unsigned long long seed)
Definition: xxhash.c:622
XXH_PUBLIC_API unsigned long long XXH64_digest(const XXH64_state_t *state_in)
Definition: xxhash.c:874
FORCE_INLINE_TEMPLATE U64 XXH64_endian_align(const void *input, size_t len, U64 seed, XXH_endianess endian, XXH_alignment align)
Definition: xxhash.c:486

Referenced by calc_superblock_checksum(), calc_thread_main(), calc_tree_checksum(), check_sector_csum(), check_superblock_checksum(), check_tree_checksum(), get_sector_csum(), and get_tree_checksum().

◆ XXH64_canonicalFromHash()

XXH_PUBLIC_API void XXH64_canonicalFromHash ( XXH64_canonical_t dst,
XXH64_hash_t  hash 
)

Definition at line 902 of file xxhash.c.

903{
906 memcpy(dst, &hash, sizeof(*dst));
907}
static U64 XXH_swap64(U64 x)
Definition: xxhash.c:268
unsigned long long XXH64_hash_t
Definition: xxhash.h:161

◆ XXH64_copyState()

XXH_PUBLIC_API void XXH64_copyState ( XXH64_state_t *restrict  dstState,
const XXH64_state_t *restrict  srcState 
)

Definition at line 368 of file xxhash.c.

369{
370 memcpy(dstState, srcState, sizeof(*dstState));
371}

◆ XXH64_createState()

XXH_PUBLIC_API XXH64_state_t * XXH64_createState ( void  )

Definition at line 596 of file xxhash.c.

597{
598 return (XXH64_state_t*)XXH_malloc(sizeof(XXH64_state_t));
599}
struct XXH64_state_s XXH64_state_t
Definition: xxhash.h:183

◆ XXH64_digest()

XXH_PUBLIC_API unsigned long long XXH64_digest ( const XXH64_state_t state_in)

Definition at line 874 of file xxhash.c.

875{
877
878 if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
879 return XXH64_digest_endian(state_in, XXH_littleEndian);
880 else
881 return XXH64_digest_endian(state_in, XXH_bigEndian);
882}
FORCE_INLINE_TEMPLATE U64 XXH64_digest_endian(const XXH64_state_t *state, XXH_endianess endian)
Definition: xxhash.c:822

Referenced by XXH64(), ZSTD_decompressContinue(), ZSTD_decompressFrame(), and ZSTD_writeEpilogue().

◆ XXH64_digest_endian()

FORCE_INLINE_TEMPLATE U64 XXH64_digest_endian ( const XXH64_state_t state,
XXH_endianess  endian 
)

Definition at line 822 of file xxhash.c.

823{
824 const BYTE * p = (const BYTE*)state->mem64;
825 const BYTE* const bEnd = (const BYTE*)state->mem64 + state->memsize;
826 U64 h64;
827
828 if (state->total_len >= 32) {
829 U64 const v1 = state->v1;
830 U64 const v2 = state->v2;
831 U64 const v3 = state->v3;
832 U64 const v4 = state->v4;
833
834 h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);
835 h64 = XXH64_mergeRound(h64, v1);
836 h64 = XXH64_mergeRound(h64, v2);
837 h64 = XXH64_mergeRound(h64, v3);
838 h64 = XXH64_mergeRound(h64, v4);
839 } else {
840 h64 = state->v3 + PRIME64_5;
841 }
842
843 h64 += (U64) state->total_len;
844
845 while (p+8<=bEnd) {
846 U64 const k1 = XXH64_round(0, XXH_readLE64(p, endian));
847 h64 ^= k1;
848 h64 = XXH_rotl64(h64,27) * PRIME64_1 + PRIME64_4;
849 p+=8;
850 }
851
852 if (p+4<=bEnd) {
853 h64 ^= (U64)(XXH_readLE32(p, endian)) * PRIME64_1;
854 h64 = XXH_rotl64(h64, 23) * PRIME64_2 + PRIME64_3;
855 p+=4;
856 }
857
858 while (p<bEnd) {
859 h64 ^= (*p) * PRIME64_5;
860 h64 = XXH_rotl64(h64, 11) * PRIME64_1;
861 p++;
862 }
863
864 h64 ^= h64 >> 33;
865 h64 *= PRIME64_2;
866 h64 ^= h64 >> 29;
867 h64 *= PRIME64_3;
868 h64 ^= h64 >> 32;
869
870 return h64;
871}
while(CdLookupNextInitialFileDirent(IrpContext, Fcb, FileContext))
#define XXH_rotl64(x, r)
Definition: xxhash.c:251
FORCE_INLINE_TEMPLATE U64 XXH_readLE64(const void *ptr, XXH_endianess endian)
Definition: xxhash.c:325
unsigned long long U64
Definition: xxhash.c:197
static const U64 PRIME64_5
Definition: xxhash.c:355
static U64 XXH64_mergeRound(U64 acc, U64 val)
Definition: xxhash.c:478
static const U64 PRIME64_2
Definition: xxhash.c:352
static const U64 PRIME64_4
Definition: xxhash.c:354
static const U64 PRIME64_1
Definition: xxhash.c:351
static const U64 PRIME64_3
Definition: xxhash.c:353
static U64 XXH64_round(U64 acc, U64 input)
Definition: xxhash.c:470

Referenced by XXH64_digest().

◆ XXH64_endian_align()

FORCE_INLINE_TEMPLATE U64 XXH64_endian_align ( const void input,
size_t  len,
U64  seed,
XXH_endianess  endian,
XXH_alignment  align 
)

Definition at line 486 of file xxhash.c.

487{
488 const BYTE* p = (const BYTE*)input;
489 const BYTE* const bEnd = p + len;
490 U64 h64;
491#define XXH_get64bits(p) XXH_readLE64_align(p, endian, align)
492
493#ifdef XXH_ACCEPT_NULL_INPUT_POINTER
494 if (p==NULL) {
495 len=0;
496 bEnd=p=(const BYTE*)(size_t)32;
497 }
498#endif
499
500 if (len>=32) {
501 const BYTE* const limit = bEnd - 32;
502 U64 v1 = seed + PRIME64_1 + PRIME64_2;
503 U64 v2 = seed + PRIME64_2;
504 U64 v3 = seed + 0;
505 U64 v4 = seed - PRIME64_1;
506
507 do {
508 v1 = XXH64_round(v1, XXH_get64bits(p)); p+=8;
509 v2 = XXH64_round(v2, XXH_get64bits(p)); p+=8;
510 v3 = XXH64_round(v3, XXH_get64bits(p)); p+=8;
511 v4 = XXH64_round(v4, XXH_get64bits(p)); p+=8;
512 } while (p<=limit);
513
514 h64 = XXH_rotl64(v1, 1) + XXH_rotl64(v2, 7) + XXH_rotl64(v3, 12) + XXH_rotl64(v4, 18);
515 h64 = XXH64_mergeRound(h64, v1);
516 h64 = XXH64_mergeRound(h64, v2);
517 h64 = XXH64_mergeRound(h64, v3);
518 h64 = XXH64_mergeRound(h64, v4);
519
520 } else {
521 h64 = seed + PRIME64_5;
522 }
523
524 h64 += (U64) len;
525
526 while (p+8<=bEnd) {
527 U64 const k1 = XXH64_round(0, XXH_get64bits(p));
528 h64 ^= k1;
529 h64 = XXH_rotl64(h64,27) * PRIME64_1 + PRIME64_4;
530 p+=8;
531 }
532
533 if (p+4<=bEnd) {
534 h64 ^= (U64)(XXH_get32bits(p)) * PRIME64_1;
535 h64 = XXH_rotl64(h64, 23) * PRIME64_2 + PRIME64_3;
536 p+=4;
537 }
538
539 while (p<bEnd) {
540 h64 ^= (*p) * PRIME64_5;
541 h64 = XXH_rotl64(h64, 11) * PRIME64_1;
542 p++;
543 }
544
545 h64 ^= h64 >> 33;
546 h64 *= PRIME64_2;
547 h64 ^= h64 >> 29;
548 h64 *= PRIME64_3;
549 h64 ^= h64 >> 32;
550
551 return h64;
552}
#define XXH_get64bits(p)

Referenced by XXH64().

◆ XXH64_freeState()

XXH_PUBLIC_API XXH_errorcode XXH64_freeState ( XXH64_state_t statePtr)

Definition at line 600 of file xxhash.c.

601{
602 XXH_free(statePtr);
603 return XXH_OK;
604}

◆ XXH64_hashFromCanonical()

XXH_PUBLIC_API XXH64_hash_t XXH64_hashFromCanonical ( const XXH64_canonical_t src)

Definition at line 914 of file xxhash.c.

915{
916 return XXH_readBE64(src);
917}
static U64 XXH_readBE64(const void *ptr)
Definition: xxhash.c:330

◆ XXH64_mergeRound()

static U64 XXH64_mergeRound ( U64  acc,
U64  val 
)
static

Definition at line 478 of file xxhash.c.

479{
480 val = XXH64_round(0, val);
481 acc ^= val;
482 acc = acc * PRIME64_1 + PRIME64_4;
483 return acc;
484}
GLuint GLfloat * val
Definition: glext.h:7180

Referenced by XXH64_digest_endian(), and XXH64_endian_align().

◆ XXH64_reset()

XXH_PUBLIC_API XXH_errorcode XXH64_reset ( XXH64_state_t statePtr,
unsigned long long  seed 
)

Definition at line 622 of file xxhash.c.

623{
624 XXH64_state_t state; /* using a local state to memcpy() in order to avoid strict-aliasing warnings */
625 memset(&state, 0, sizeof(state)-8); /* do not write into reserved, for future removal */
626 state.v1 = seed + PRIME64_1 + PRIME64_2;
627 state.v2 = seed + PRIME64_2;
628 state.v3 = seed + 0;
629 state.v4 = seed - PRIME64_1;
630 memcpy(statePtr, &state, sizeof(state));
631 return XXH_OK;
632}

Referenced by XXH64(), ZSTD_decodeFrameHeader(), and ZSTD_resetCCtx_internal().

◆ XXH64_round()

static U64 XXH64_round ( U64  acc,
U64  input 
)
static

Definition at line 470 of file xxhash.c.

471{
472 acc += input * PRIME64_2;
473 acc = XXH_rotl64(acc, 31);
474 acc *= PRIME64_1;
475 return acc;
476}

Referenced by XXH64_digest_endian(), XXH64_endian_align(), XXH64_mergeRound(), and XXH64_update_endian().

◆ XXH64_update()

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

Definition at line 810 of file xxhash.c.

811{
813
814 if ((endian_detected==XXH_littleEndian) || XXH_FORCE_NATIVE_FORMAT)
815 return XXH64_update_endian(state_in, input, len, XXH_littleEndian);
816 else
817 return XXH64_update_endian(state_in, input, len, XXH_bigEndian);
818}
FORCE_INLINE_TEMPLATE XXH_errorcode XXH64_update_endian(XXH64_state_t *state, const void *input, size_t len, XXH_endianess endian)
Definition: xxhash.c:755

Referenced by XXH64(), ZSTD_compress_frameChunk(), ZSTD_decompressContinue(), and ZSTD_decompressFrame().

◆ XXH64_update_endian()

FORCE_INLINE_TEMPLATE XXH_errorcode XXH64_update_endian ( XXH64_state_t state,
const void input,
size_t  len,
XXH_endianess  endian 
)

Definition at line 755 of file xxhash.c.

756{
757 const BYTE* p = (const BYTE*)input;
758 const BYTE* const bEnd = p + len;
759
760#ifdef XXH_ACCEPT_NULL_INPUT_POINTER
761 if (input==NULL) return XXH_ERROR;
762#endif
763
764 state->total_len += len;
765
766 if (state->memsize + len < 32) { /* fill in tmp buffer */
767 XXH_memcpy(((BYTE*)state->mem64) + state->memsize, input, len);
768 state->memsize += (U32)len;
769 return XXH_OK;
770 }
771
772 if (state->memsize) { /* tmp buffer is full */
773 XXH_memcpy(((BYTE*)state->mem64) + state->memsize, input, 32-state->memsize);
774 state->v1 = XXH64_round(state->v1, XXH_readLE64(state->mem64+0, endian));
775 state->v2 = XXH64_round(state->v2, XXH_readLE64(state->mem64+1, endian));
776 state->v3 = XXH64_round(state->v3, XXH_readLE64(state->mem64+2, endian));
777 state->v4 = XXH64_round(state->v4, XXH_readLE64(state->mem64+3, endian));
778 p += 32-state->memsize;
779 state->memsize = 0;
780 }
781
782 if (p+32 <= bEnd) {
783 const BYTE* const limit = bEnd - 32;
784 U64 v1 = state->v1;
785 U64 v2 = state->v2;
786 U64 v3 = state->v3;
787 U64 v4 = state->v4;
788
789 do {
790 v1 = XXH64_round(v1, XXH_readLE64(p, endian)); p+=8;
791 v2 = XXH64_round(v2, XXH_readLE64(p, endian)); p+=8;
792 v3 = XXH64_round(v3, XXH_readLE64(p, endian)); p+=8;
793 v4 = XXH64_round(v4, XXH_readLE64(p, endian)); p+=8;
794 } while (p<=limit);
795
796 state->v1 = v1;
797 state->v2 = v2;
798 state->v3 = v3;
799 state->v4 = v4;
800 }
801
802 if (p < bEnd) {
803 XXH_memcpy(state->mem64, p, (size_t)(bEnd-p));
804 state->memsize = (unsigned)(bEnd-p);
805 }
806
807 return XXH_OK;
808}

Referenced by XXH64_update().

◆ XXH_free()

static void XXH_free ( void p)
static

Definition at line 119 of file xxhash.c.

119 {
120 ExFreePool(p);
121}
#define ExFreePool(addr)
Definition: env_spec_w32.h:352

Referenced by XXH32_freeState(), and XXH64_freeState().

◆ XXH_malloc()

static void * XXH_malloc ( size_t  s)
static

Definition at line 115 of file xxhash.c.

115 {
117}
#define ExAllocatePoolWithTag(hernya, size, tag)
Definition: env_spec_w32.h:350
#define PagedPool
Definition: env_spec_w32.h:308
GLdouble s
Definition: gl.h:2039
#define XXH_ALLOC_TAG
Definition: xxhash.c:113

Referenced by XXH32_createState(), and XXH64_createState().

◆ XXH_memcpy()

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

Definition at line 147 of file xxhash.c.

147{ return memcpy(dest,src,size); }
GLsizeiptr size
Definition: glext.h:5919
static char * dest
Definition: rtl.c:135

Referenced by XXH32_update_endian(), and XXH64_update_endian().

◆ XXH_read32()

static U32 XXH_read32 ( const void memPtr)
static

Definition at line 223 of file xxhash.c.

224{
225 U32 val;
226 memcpy(&val, memPtr, sizeof(val));
227 return val;
228}

Referenced by XXH_readBE32(), and XXH_readLE32_align().

◆ XXH_read64()

static U64 XXH_read64 ( const void memPtr)
static

Definition at line 230 of file xxhash.c.

231{
232 U64 val;
233 memcpy(&val, memPtr, sizeof(val));
234 return val;
235}

Referenced by XXH_readBE64(), and XXH_readLE64_align().

◆ XXH_readBE32()

static U32 XXH_readBE32 ( const void ptr)
static

Definition at line 312 of file xxhash.c.

313{
315}
static PVOID ptr
Definition: dispmode.c:27
static U32 XXH_read32(const void *memPtr)
Definition: xxhash.c:223

Referenced by XXH32_hashFromCanonical().

◆ XXH_readBE64()

static U64 XXH_readBE64 ( const void ptr)
static

Definition at line 330 of file xxhash.c.

331{
333}
static U64 XXH_read64(const void *memPtr)
Definition: xxhash.c:230

Referenced by XXH64_hashFromCanonical().

◆ XXH_readLE32()

FORCE_INLINE_TEMPLATE U32 XXH_readLE32 ( const void ptr,
XXH_endianess  endian 
)

Definition at line 307 of file xxhash.c.

308{
309 return XXH_readLE32_align(ptr, endian, XXH_unaligned);
310}
FORCE_INLINE_TEMPLATE U32 XXH_readLE32_align(const void *ptr, XXH_endianess endian, XXH_alignment align)
Definition: xxhash.c:299

Referenced by XXH32_digest_endian(), XXH32_update_endian(), and XXH64_digest_endian().

◆ XXH_readLE32_align()

FORCE_INLINE_TEMPLATE U32 XXH_readLE32_align ( const void ptr,
XXH_endianess  endian,
XXH_alignment  align 
)

Definition at line 299 of file xxhash.c.

300{
301 if (align==XXH_unaligned)
303 else
304 return endian==XXH_littleEndian ? *(const U32*)ptr : XXH_swap32(*(const U32*)ptr);
305}
int align(int length, int align)
Definition: dsound8.c:36

Referenced by XXH_readLE32().

◆ XXH_readLE64()

FORCE_INLINE_TEMPLATE U64 XXH_readLE64 ( const void ptr,
XXH_endianess  endian 
)

Definition at line 325 of file xxhash.c.

326{
327 return XXH_readLE64_align(ptr, endian, XXH_unaligned);
328}
FORCE_INLINE_TEMPLATE U64 XXH_readLE64_align(const void *ptr, XXH_endianess endian, XXH_alignment align)
Definition: xxhash.c:317

Referenced by XXH64_digest_endian(), and XXH64_update_endian().

◆ XXH_readLE64_align()

FORCE_INLINE_TEMPLATE U64 XXH_readLE64_align ( const void ptr,
XXH_endianess  endian,
XXH_alignment  align 
)

Definition at line 317 of file xxhash.c.

318{
319 if (align==XXH_unaligned)
321 else
322 return endian==XXH_littleEndian ? *(const U64*)ptr : XXH_swap64(*(const U64*)ptr);
323}

Referenced by XXH_readLE64().

◆ XXH_swap32()

static U32 XXH_swap32 ( U32  x)
static

Definition at line 261 of file xxhash.c.

262{
263 return ((x << 24) & 0xff000000 ) |
264 ((x << 8) & 0x00ff0000 ) |
265 ((x >> 8) & 0x0000ff00 ) |
266 ((x >> 24) & 0x000000ff );
267}
GLint GLint GLint GLint GLint x
Definition: gl.h:1548

Referenced by XXH32_canonicalFromHash(), XXH_readBE32(), and XXH_readLE32_align().

◆ XXH_swap64()

static U64 XXH_swap64 ( U64  x)
static

Definition at line 268 of file xxhash.c.

269{
270 return ((x << 56) & 0xff00000000000000ULL) |
271 ((x << 40) & 0x00ff000000000000ULL) |
272 ((x << 24) & 0x0000ff0000000000ULL) |
273 ((x << 8) & 0x000000ff00000000ULL) |
274 ((x >> 8) & 0x00000000ff000000ULL) |
275 ((x >> 24) & 0x0000000000ff0000ULL) |
276 ((x >> 40) & 0x000000000000ff00ULL) |
277 ((x >> 56) & 0x00000000000000ffULL);
278}

Referenced by XXH64_canonicalFromHash(), XXH_readBE64(), and XXH_readLE64_align().

◆ XXH_versionNumber()

XXH_PUBLIC_API unsigned XXH_versionNumber ( void  )

Definition at line 357 of file xxhash.c.

357{ return XXH_VERSION_NUMBER; }
#define XXH_VERSION_NUMBER
Definition: xxhash.h:153

Variable Documentation

◆ g_one

const int g_one = 1
static

Definition at line 289 of file xxhash.c.

◆ PRIME32_1

const U32 PRIME32_1 = 2654435761U
static

Definition at line 345 of file xxhash.c.

Referenced by XXH32_digest_endian(), XXH32_endian_align(), XXH32_reset(), and XXH32_round().

◆ PRIME32_2

const U32 PRIME32_2 = 2246822519U
static

Definition at line 346 of file xxhash.c.

Referenced by XXH32_digest_endian(), XXH32_endian_align(), XXH32_reset(), and XXH32_round().

◆ PRIME32_3

const U32 PRIME32_3 = 3266489917U
static

Definition at line 347 of file xxhash.c.

Referenced by XXH32_digest_endian(), and XXH32_endian_align().

◆ PRIME32_4

const U32 PRIME32_4 = 668265263U
static

Definition at line 348 of file xxhash.c.

Referenced by XXH32_digest_endian(), and XXH32_endian_align().

◆ PRIME32_5

const U32 PRIME32_5 = 374761393U
static

Definition at line 349 of file xxhash.c.

Referenced by XXH32_digest_endian(), and XXH32_endian_align().

◆ PRIME64_1

const U64 PRIME64_1 = 11400714785074694791ULL
static

◆ PRIME64_2

const U64 PRIME64_2 = 14029467366897019727ULL
static

Definition at line 352 of file xxhash.c.

Referenced by XXH64_digest_endian(), XXH64_endian_align(), XXH64_reset(), and XXH64_round().

◆ PRIME64_3

const U64 PRIME64_3 = 1609587929392839161ULL
static

Definition at line 353 of file xxhash.c.

Referenced by XXH64_digest_endian(), and XXH64_endian_align().

◆ PRIME64_4

const U64 PRIME64_4 = 9650029242287828579ULL
static

Definition at line 354 of file xxhash.c.

Referenced by XXH64_digest_endian(), XXH64_endian_align(), and XXH64_mergeRound().

◆ PRIME64_5

const U64 PRIME64_5 = 2870177450012600261ULL
static

Definition at line 355 of file xxhash.c.

Referenced by XXH64_digest_endian(), and XXH64_endian_align().