AuroraMiddleware/zstd
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Renamed cover and fast cover hash functions/vars

Browse Source
This commit is contained in:
Carl Woffenden 2020-06-22 11:54:24 +02:00
parent 4a9b7d136f
commit 38cdb6a072
2 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
lib/dictBuilder/cover.c
View File

@ -129,9 +129,9 @@ static int COVER_map_init(COVER_map_t *map, U32 size) {
/**
* Internal hash function
*/
static const U32 prime4bytes = 2654435761U;
static const U32 COVER_prime4bytes = 2654435761U;
static U32 COVER_map_hash(COVER_map_t *map, U32 key) {
return (key * prime4bytes) >> (32 - map->sizeLog);
return (key * COVER_prime4bytes) >> (32 - map->sizeLog);
}
/**

18
lib/dictBuilder/fastcover.c
View File

@ -75,15 +75,15 @@ static clock_t g_time = 0;
/*-*************************************
* Hash Functions
* Hash Functions (matching zstd_compress_internal.h)
***************************************/
static const U64 prime6bytes = 227718039650203ULL;
static size_t ZSTD_hash6(U64 u, U32 h) { return (size_t)(((u << (64-48)) * prime6bytes) >> (64-h)) ; }
static size_t ZSTD_hash6Ptr(const void* p, U32 h) { return ZSTD_hash6(MEM_readLE64(p), h); }
static const U64 FASTCOVER_prime6bytes = 227718039650203ULL;
static size_t FASTCOVER_hash6(U64 u, U32 h) { return (size_t)(((u << (64-48)) * FASTCOVER_prime6bytes) >> (64-h)) ; }
static size_t FASTCOVER_hash6Ptr(const void* p, U32 h) { return FASTCOVER_hash6(MEM_readLE64(p), h); }
static const U64 prime8bytes = 0xCF1BBCDCB7A56463ULL;
static size_t ZSTD_hash8(U64 u, U32 h) { return (size_t)(((u) * prime8bytes) >> (64-h)) ; }
static size_t ZSTD_hash8Ptr(const void* p, U32 h) { return ZSTD_hash8(MEM_readLE64(p), h); }
static const U64 FASTCOVER_prime8bytes = 0xCF1BBCDCB7A56463ULL;
static size_t FASTCOVER_hash8(U64 u, U32 h) { return (size_t)(((u) * FASTCOVER_prime8bytes) >> (64-h)) ; }
static size_t FASTCOVER_hash8Ptr(const void* p, U32 h) { return FASTCOVER_hash8(MEM_readLE64(p), h); }
/**
@ -91,9 +91,9 @@ static size_t ZSTD_hash8Ptr(const void* p, U32 h) { return ZSTD_hash8(MEM_readLE
*/
static size_t FASTCOVER_hashPtrToIndex(const void* p, U32 h, unsigned d) {
if (d == 6) {
return ZSTD_hash6Ptr(p, h) & ((1 << h) - 1);
return FASTCOVER_hash6Ptr(p, h) & ((1 << h) - 1);
}
return ZSTD_hash8Ptr(p, h) & ((1 << h) - 1);
return FASTCOVER_hash8Ptr(p, h) & ((1 << h) - 1);
}