7zip/C/Xxh64.h at 24.08 · AIahmedshrf/7zip

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/* Xxh64.h -- XXH64 hash calculation interfaces

2023-08-18 : Igor Pavlov : Public domain */

#ifndef ZIP7_INC_XXH64_H

#define ZIP7_INC_XXH64_H

#include "7zTypes.h"

EXTERN_C_BEGIN

#define Z7_XXH64_BLOCK_SIZE (4 * 8)

typedef struct

{

UInt64 v[4];

} CXxh64State;

void Xxh64State_Init(CXxh64State *p);

// end != data && end == data + Z7_XXH64_BLOCK_SIZE * numBlocks

void Z7_FASTCALL Xxh64State_UpdateBlocks(CXxh64State *p, const void *data, const void *end);

Xxh64State_Digest():

data:

the function processes only

(totalCount & (Z7_XXH64_BLOCK_SIZE - 1)) bytes in (data): (smaller than 32 bytes).

totalCount: total size of hashed stream:

it includes total size of data processed by previous Xxh64State_UpdateBlocks() calls,

and it also includes current processed size in (data).

UInt64 Xxh64State_Digest(const CXxh64State *p, const void *data, UInt64 totalCount);

typedef struct

{

CXxh64State state;

UInt64 count;

UInt64 buf64[4];

} CXxh64;

void Xxh64_Init(CXxh64 *p);

void Xxh64_Update(CXxh64 *p, const void *data, size_t size);

#define Xxh64_Digest(p) \

Xxh64State_Digest(&(p)->state, (p)->buf64, (p)->count)

EXTERN_C_END

#endif