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8c9d35ed22
Bumps the go-modules-updates group with 2 updates in the / directory: [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) and [golang.org/x/crypto](https://github.com/golang/crypto). Updates `github.com/prometheus/client_golang` from 1.19.1 to 1.20.2 - [Release notes](https://github.com/prometheus/client_golang/releases) - [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md) - [Commits](https://github.com/prometheus/client_golang/compare/v1.19.1...v1.20.2) Updates `golang.org/x/crypto` from 0.24.0 to 0.26.0 - [Commits](https://github.com/golang/crypto/compare/v0.24.0...v0.26.0) --- updated-dependencies: - dependency-name: github.com/prometheus/client_golang dependency-type: direct:production update-type: version-update:semver-minor dependency-group: go-modules-updates - dependency-name: golang.org/x/crypto dependency-type: direct:production update-type: version-update:semver-minor dependency-group: go-modules-updates ... Signed-off-by: dependabot[bot] <support@github.com>
36 lines
1.1 KiB
Go
36 lines
1.1 KiB
Go
// Copyright 2019+ Klaus Post. All rights reserved.
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// License information can be found in the LICENSE file.
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// Based on work by Yann Collet, released under BSD License.
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package zstd
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const (
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prime3bytes = 506832829
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prime4bytes = 2654435761
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prime5bytes = 889523592379
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prime6bytes = 227718039650203
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prime7bytes = 58295818150454627
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prime8bytes = 0xcf1bbcdcb7a56463
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)
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// hashLen returns a hash of the lowest mls bytes of with length output bits.
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// mls must be >=3 and <=8. Any other value will return hash for 4 bytes.
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// length should always be < 32.
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// Preferably length and mls should be a constant for inlining.
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func hashLen(u uint64, length, mls uint8) uint32 {
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switch mls {
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case 3:
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return (uint32(u<<8) * prime3bytes) >> (32 - length)
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case 5:
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return uint32(((u << (64 - 40)) * prime5bytes) >> (64 - length))
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case 6:
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return uint32(((u << (64 - 48)) * prime6bytes) >> (64 - length))
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case 7:
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return uint32(((u << (64 - 56)) * prime7bytes) >> (64 - length))
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case 8:
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return uint32((u * prime8bytes) >> (64 - length))
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default:
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return (uint32(u) * prime4bytes) >> (32 - length)
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}
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}
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