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authordependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>2021-08-10 13:00:34 +0000
committerGitHub <noreply@github.com>2021-08-10 13:00:34 +0000
commitf7de8bc8096f3dfdf25a4b08b0b933a43192218c (patch)
tree26b11a9881829efcc636cd29515a7c22d85621f3 /vendor/github.com/klauspost/compress/zstd/hash.go
parent6f61e229911e399d92f8fbe0574654f308f73b39 (diff)
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Bump github.com/containers/storage from 1.33.1 to 1.34.0
Bumps [github.com/containers/storage](https://github.com/containers/storage) from 1.33.1 to 1.34.0. - [Release notes](https://github.com/containers/storage/releases) - [Changelog](https://github.com/containers/storage/blob/main/docs/containers-storage-changes.md) - [Commits](https://github.com/containers/storage/compare/v1.33.1...v1.34.0) --- updated-dependencies: - dependency-name: github.com/containers/storage dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com>
Diffstat (limited to 'vendor/github.com/klauspost/compress/zstd/hash.go')
-rw-r--r--vendor/github.com/klauspost/compress/zstd/hash.go60
1 files changed, 12 insertions, 48 deletions
diff --git a/vendor/github.com/klauspost/compress/zstd/hash.go b/vendor/github.com/klauspost/compress/zstd/hash.go
index 4a752067f..cf33f29a1 100644
--- a/vendor/github.com/klauspost/compress/zstd/hash.go
+++ b/vendor/github.com/klauspost/compress/zstd/hash.go
@@ -13,24 +13,24 @@ const (
prime8bytes = 0xcf1bbcdcb7a56463
)
-// hashLen returns a hash of the lowest l bytes of u for a size size of h bytes.
-// l must be >=4 and <=8. Any other value will return hash for 4 bytes.
-// h should always be <32.
-// Preferably h and l should be a constant.
-// FIXME: This does NOT get resolved, if 'mls' is constant,
-// so this cannot be used.
-func hashLen(u uint64, hashLog, mls uint8) uint32 {
+// hashLen returns a hash of the lowest mls bytes of with length output bits.
+// mls must be >=3 and <=8. Any other value will return hash for 4 bytes.
+// length should always be < 32.
+// Preferably length and mls should be a constant for inlining.
+func hashLen(u uint64, length, mls uint8) uint32 {
switch mls {
+ case 3:
+ return (uint32(u<<8) * prime3bytes) >> (32 - length)
case 5:
- return hash5(u, hashLog)
+ return uint32(((u << (64 - 40)) * prime5bytes) >> (64 - length))
case 6:
- return hash6(u, hashLog)
+ return uint32(((u << (64 - 48)) * prime6bytes) >> (64 - length))
case 7:
- return hash7(u, hashLog)
+ return uint32(((u << (64 - 56)) * prime7bytes) >> (64 - length))
case 8:
- return hash8(u, hashLog)
+ return uint32((u * prime8bytes) >> (64 - length))
default:
- return hash4x64(u, hashLog)
+ return (uint32(u) * prime4bytes) >> (32 - length)
}
}
@@ -39,39 +39,3 @@ func hashLen(u uint64, hashLog, mls uint8) uint32 {
func hash3(u uint32, h uint8) uint32 {
return ((u << (32 - 24)) * prime3bytes) >> ((32 - h) & 31)
}
-
-// hash4 returns the hash of u to fit in a hash table with h bits.
-// Preferably h should be a constant and should always be <32.
-func hash4(u uint32, h uint8) uint32 {
- return (u * prime4bytes) >> ((32 - h) & 31)
-}
-
-// hash4x64 returns the hash of the lowest 4 bytes of u to fit in a hash table with h bits.
-// Preferably h should be a constant and should always be <32.
-func hash4x64(u uint64, h uint8) uint32 {
- return (uint32(u) * prime4bytes) >> ((32 - h) & 31)
-}
-
-// hash5 returns the hash of the lowest 5 bytes of u to fit in a hash table with h bits.
-// Preferably h should be a constant and should always be <64.
-func hash5(u uint64, h uint8) uint32 {
- return uint32(((u << (64 - 40)) * prime5bytes) >> ((64 - h) & 63))
-}
-
-// hash6 returns the hash of the lowest 6 bytes of u to fit in a hash table with h bits.
-// Preferably h should be a constant and should always be <64.
-func hash6(u uint64, h uint8) uint32 {
- return uint32(((u << (64 - 48)) * prime6bytes) >> ((64 - h) & 63))
-}
-
-// hash7 returns the hash of the lowest 7 bytes of u to fit in a hash table with h bits.
-// Preferably h should be a constant and should always be <64.
-func hash7(u uint64, h uint8) uint32 {
- return uint32(((u << (64 - 56)) * prime7bytes) >> ((64 - h) & 63))
-}
-
-// hash8 returns the hash of u to fit in a hash table with h bits.
-// Preferably h should be a constant and should always be <64.
-func hash8(u uint64, h uint8) uint32 {
- return uint32((u * prime8bytes) >> ((64 - h) & 63))
-}