mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-12-28 02:05:39 +00:00
5a1fd7dadd
Bumps [github.com/SevereCloud/vksdk/v2](https://github.com/SevereCloud/vksdk) from 2.11.0 to 2.13.0. - [Release notes](https://github.com/SevereCloud/vksdk/releases) - [Commits](https://github.com/SevereCloud/vksdk/compare/v2.11.0...v2.13.0) --- updated-dependencies: - dependency-name: github.com/SevereCloud/vksdk/v2 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
42 lines
1.3 KiB
Go
42 lines
1.3 KiB
Go
// Copyright 2019+ Klaus Post. All rights reserved.
|
|
// License information can be found in the LICENSE file.
|
|
// Based on work by Yann Collet, released under BSD License.
|
|
|
|
package zstd
|
|
|
|
const (
|
|
prime3bytes = 506832829
|
|
prime4bytes = 2654435761
|
|
prime5bytes = 889523592379
|
|
prime6bytes = 227718039650203
|
|
prime7bytes = 58295818150454627
|
|
prime8bytes = 0xcf1bbcdcb7a56463
|
|
)
|
|
|
|
// 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 uint32(((u << (64 - 40)) * prime5bytes) >> (64 - length))
|
|
case 6:
|
|
return uint32(((u << (64 - 48)) * prime6bytes) >> (64 - length))
|
|
case 7:
|
|
return uint32(((u << (64 - 56)) * prime7bytes) >> (64 - length))
|
|
case 8:
|
|
return uint32((u * prime8bytes) >> (64 - length))
|
|
default:
|
|
return (uint32(u) * prime4bytes) >> (32 - length)
|
|
}
|
|
}
|
|
|
|
// hash3 returns the hash of the lower 3 bytes of u to fit in a hash table with h bits.
|
|
// Preferably h should be a constant and should always be <32.
|
|
func hash3(u uint32, h uint8) uint32 {
|
|
return ((u << (32 - 24)) * prime3bytes) >> ((32 - h) & 31)
|
|
}
|