mirror of https://github.com/octoleo/restic.git
restorer: go mod vendor; go mod tidy
Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
This commit is contained in:
Igor Fedorenko
Leo R. Lundgren
parent
f17ffa0283
commit
c52198d12c
1
go.mod
1
go.mod
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@ -6,6 +6,7 @@ require (
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github.com/Azure/azure-sdk-for-go v27.3.0+incompatible
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github.com/Azure/go-autorest/autorest v0.9.2 // indirect
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github.com/cenkalti/backoff v2.1.1+incompatible
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github.com/cespare/xxhash v1.1.0
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github.com/cpuguy83/go-md2man v1.0.10 // indirect
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github.com/dnaeon/go-vcr v1.0.1 // indirect
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github.com/elithrar/simple-scrypt v1.3.0
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6
go.sum
6
go.sum
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@ -20,6 +20,8 @@ github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6L
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github.com/Azure/go-autorest/tracing v0.5.0 h1:TRn4WjSnkcSy5AEG3pnbtFSwNtwzjr4VYyQflFE619k=
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github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
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github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
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github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
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github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
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github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
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github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
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@ -28,6 +30,8 @@ github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb
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github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
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github.com/cenkalti/backoff v2.1.1+incompatible h1:tKJnvO2kl0zmb/jA5UKAt4VoEVw1qxKWjE/Bpp46npY=
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github.com/cenkalti/backoff v2.1.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
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github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
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github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
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github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
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github.com/cpuguy83/go-md2man v1.0.10 h1:BSKMNlYxDvnunlTymqtgONjNnaRV1sTpcovwwjF22jk=
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github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
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@ -145,6 +149,8 @@ github.com/smartystreets/assertions v0.0.0-20190401211740-f487f9de1cd3 h1:hBSHah
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github.com/smartystreets/assertions v0.0.0-20190401211740-f487f9de1cd3/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
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github.com/smartystreets/goconvey v0.0.0-20190330032615-68dc04aab96a h1:pa8hGb/2YqsZKovtsgrwcDH1RZhVbTKCjLp47XpqCDs=
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github.com/smartystreets/goconvey v0.0.0-20190330032615-68dc04aab96a/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
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github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72 h1:qLC7fQah7D6K1B0ujays3HV9gkFtllcxhzImRR7ArPQ=
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github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
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github.com/spf13/cobra v0.0.3 h1:ZlrZ4XsMRm04Fr5pSFxBgfND2EBVa1nLpiy1stUsX/8=
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github.com/spf13/cobra v0.0.3/go.mod h1:1l0Ry5zgKvJasoi3XT1TypsSe7PqH0Sj9dhYf7v3XqQ=
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github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
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@ -0,0 +1,22 @@
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Copyright (c) 2016 Caleb Spare
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MIT License
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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@ -0,0 +1,50 @@
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# xxhash
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[](https://godoc.org/github.com/cespare/xxhash)
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xxhash is a Go implementation of the 64-bit
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[xxHash](http://cyan4973.github.io/xxHash/) algorithm, XXH64. This is a
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high-quality hashing algorithm that is much faster than anything in the Go
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standard library.
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The API is very small, taking its cue from the other hashing packages in the
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standard library:
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$ go doc github.com/cespare/xxhash !
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package xxhash // import "github.com/cespare/xxhash"
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Package xxhash implements the 64-bit variant of xxHash (XXH64) as described
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at http://cyan4973.github.io/xxHash/.
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func New() hash.Hash64
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func Sum64(b []byte) uint64
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func Sum64String(s string) uint64
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This implementation provides a fast pure-Go implementation and an even faster
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assembly implementation for amd64.
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## Benchmarks
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Here are some quick benchmarks comparing the pure-Go and assembly
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implementations of Sum64 against another popular Go XXH64 implementation,
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[github.com/OneOfOne/xxhash](https://github.com/OneOfOne/xxhash):
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| input size | OneOfOne | cespare (purego) | cespare |
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| --- | --- | --- | --- |
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| 5 B | 416 MB/s | 720 MB/s | 872 MB/s |
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| 100 B | 3980 MB/s | 5013 MB/s | 5252 MB/s |
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| 4 KB | 12727 MB/s | 12999 MB/s | 13026 MB/s |
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| 10 MB | 9879 MB/s | 10775 MB/s | 10913 MB/s |
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These numbers were generated with:
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```
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$ go test -benchtime 10s -bench '/OneOfOne,'
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$ go test -tags purego -benchtime 10s -bench '/xxhash,'
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$ go test -benchtime 10s -bench '/xxhash,'
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```
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## Projects using this package
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- [InfluxDB](https://github.com/influxdata/influxdb)
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- [Prometheus](https://github.com/prometheus/prometheus)
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@ -0,0 +1,6 @@
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module github.com/cespare/xxhash
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require (
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github.com/OneOfOne/xxhash v1.2.2
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github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72
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)
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@ -0,0 +1,4 @@
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github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
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github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
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github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72 h1:qLC7fQah7D6K1B0ujays3HV9gkFtllcxhzImRR7ArPQ=
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github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
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@ -0,0 +1,14 @@
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// +build !go1.9
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package xxhash
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// TODO(caleb): After Go 1.10 comes out, remove this fallback code.
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func rol1(x uint64) uint64 { return (x << 1) | (x >> (64 - 1)) }
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func rol7(x uint64) uint64 { return (x << 7) | (x >> (64 - 7)) }
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func rol11(x uint64) uint64 { return (x << 11) | (x >> (64 - 11)) }
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func rol12(x uint64) uint64 { return (x << 12) | (x >> (64 - 12)) }
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func rol18(x uint64) uint64 { return (x << 18) | (x >> (64 - 18)) }
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func rol23(x uint64) uint64 { return (x << 23) | (x >> (64 - 23)) }
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func rol27(x uint64) uint64 { return (x << 27) | (x >> (64 - 27)) }
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func rol31(x uint64) uint64 { return (x << 31) | (x >> (64 - 31)) }
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@ -0,0 +1,14 @@
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// +build go1.9
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package xxhash
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import "math/bits"
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func rol1(x uint64) uint64 { return bits.RotateLeft64(x, 1) }
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func rol7(x uint64) uint64 { return bits.RotateLeft64(x, 7) }
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func rol11(x uint64) uint64 { return bits.RotateLeft64(x, 11) }
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func rol12(x uint64) uint64 { return bits.RotateLeft64(x, 12) }
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func rol18(x uint64) uint64 { return bits.RotateLeft64(x, 18) }
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func rol23(x uint64) uint64 { return bits.RotateLeft64(x, 23) }
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func rol27(x uint64) uint64 { return bits.RotateLeft64(x, 27) }
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func rol31(x uint64) uint64 { return bits.RotateLeft64(x, 31) }
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@ -0,0 +1,168 @@
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// Package xxhash implements the 64-bit variant of xxHash (XXH64) as described
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// at http://cyan4973.github.io/xxHash/.
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package xxhash
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import (
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"encoding/binary"
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"hash"
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)
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const (
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prime1 uint64 = 11400714785074694791
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prime2 uint64 = 14029467366897019727
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prime3 uint64 = 1609587929392839161
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prime4 uint64 = 9650029242287828579
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prime5 uint64 = 2870177450012600261
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)
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// NOTE(caleb): I'm using both consts and vars of the primes. Using consts where
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// possible in the Go code is worth a small (but measurable) performance boost
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// by avoiding some MOVQs. Vars are needed for the asm and also are useful for
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// convenience in the Go code in a few places where we need to intentionally
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// avoid constant arithmetic (e.g., v1 := prime1 + prime2 fails because the
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// result overflows a uint64).
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var (
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prime1v = prime1
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prime2v = prime2
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prime3v = prime3
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prime4v = prime4
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prime5v = prime5
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)
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type xxh struct {
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v1 uint64
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v2 uint64
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v3 uint64
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v4 uint64
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total int
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mem [32]byte
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n int // how much of mem is used
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}
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// New creates a new hash.Hash64 that implements the 64-bit xxHash algorithm.
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func New() hash.Hash64 {
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var x xxh
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x.Reset()
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return &x
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}
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func (x *xxh) Reset() {
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x.n = 0
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x.total = 0
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x.v1 = prime1v + prime2
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x.v2 = prime2
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x.v3 = 0
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x.v4 = -prime1v
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}
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func (x *xxh) Size() int { return 8 }
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func (x *xxh) BlockSize() int { return 32 }
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// Write adds more data to x. It always returns len(b), nil.
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func (x *xxh) Write(b []byte) (n int, err error) {
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n = len(b)
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x.total += len(b)
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if x.n+len(b) < 32 {
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// This new data doesn't even fill the current block.
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copy(x.mem[x.n:], b)
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x.n += len(b)
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return
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}
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if x.n > 0 {
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// Finish off the partial block.
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copy(x.mem[x.n:], b)
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x.v1 = round(x.v1, u64(x.mem[0:8]))
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x.v2 = round(x.v2, u64(x.mem[8:16]))
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x.v3 = round(x.v3, u64(x.mem[16:24]))
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x.v4 = round(x.v4, u64(x.mem[24:32]))
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b = b[32-x.n:]
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x.n = 0
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}
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if len(b) >= 32 {
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// One or more full blocks left.
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b = writeBlocks(x, b)
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}
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// Store any remaining partial block.
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copy(x.mem[:], b)
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x.n = len(b)
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return
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}
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func (x *xxh) Sum(b []byte) []byte {
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s := x.Sum64()
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return append(
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b,
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byte(s>>56),
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byte(s>>48),
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byte(s>>40),
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byte(s>>32),
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byte(s>>24),
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byte(s>>16),
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byte(s>>8),
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byte(s),
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)
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}
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func (x *xxh) Sum64() uint64 {
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var h uint64
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if x.total >= 32 {
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v1, v2, v3, v4 := x.v1, x.v2, x.v3, x.v4
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h = rol1(v1) + rol7(v2) + rol12(v3) + rol18(v4)
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h = mergeRound(h, v1)
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h = mergeRound(h, v2)
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h = mergeRound(h, v3)
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h = mergeRound(h, v4)
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} else {
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h = x.v3 + prime5
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}
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h += uint64(x.total)
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i, end := 0, x.n
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for ; i+8 <= end; i += 8 {
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k1 := round(0, u64(x.mem[i:i+8]))
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h ^= k1
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h = rol27(h)*prime1 + prime4
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}
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if i+4 <= end {
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h ^= uint64(u32(x.mem[i:i+4])) * prime1
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h = rol23(h)*prime2 + prime3
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i += 4
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}
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for i < end {
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h ^= uint64(x.mem[i]) * prime5
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h = rol11(h) * prime1
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i++
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}
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|
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h ^= h >> 33
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h *= prime2
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h ^= h >> 29
|
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h *= prime3
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h ^= h >> 32
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return h
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}
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func u64(b []byte) uint64 { return binary.LittleEndian.Uint64(b) }
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func u32(b []byte) uint32 { return binary.LittleEndian.Uint32(b) }
|
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|
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func round(acc, input uint64) uint64 {
|
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acc += input * prime2
|
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acc = rol31(acc)
|
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acc *= prime1
|
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return acc
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}
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|
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func mergeRound(acc, val uint64) uint64 {
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val = round(0, val)
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acc ^= val
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acc = acc*prime1 + prime4
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return acc
|
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}
|
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|
|
@ -0,0 +1,12 @@
|
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// +build !appengine
|
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// +build gc
|
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// +build !purego
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|
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package xxhash
|
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|
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// Sum64 computes the 64-bit xxHash digest of b.
|
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//
|
||||
//go:noescape
|
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func Sum64(b []byte) uint64
|
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|
||||
func writeBlocks(x *xxh, b []byte) []byte
|
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|
|
@ -0,0 +1,233 @@
|
|||
// +build !appengine
|
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// +build gc
|
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// +build !purego
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|
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#include "textflag.h"
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|
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// Register allocation:
|
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// AX h
|
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// CX pointer to advance through b
|
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// DX n
|
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// BX loop end
|
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// R8 v1, k1
|
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// R9 v2
|
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// R10 v3
|
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// R11 v4
|
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// R12 tmp
|
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// R13 prime1v
|
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// R14 prime2v
|
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// R15 prime4v
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|
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// round reads from and advances the buffer pointer in CX.
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// It assumes that R13 has prime1v and R14 has prime2v.
|
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#define round(r) \
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MOVQ (CX), R12 \
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ADDQ $8, CX \
|
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IMULQ R14, R12 \
|
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ADDQ R12, r \
|
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ROLQ $31, r \
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IMULQ R13, r
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|
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// mergeRound applies a merge round on the two registers acc and val.
|
||||
// It assumes that R13 has prime1v, R14 has prime2v, and R15 has prime4v.
|
||||
#define mergeRound(acc, val) \
|
||||
IMULQ R14, val \
|
||||
ROLQ $31, val \
|
||||
IMULQ R13, val \
|
||||
XORQ val, acc \
|
||||
IMULQ R13, acc \
|
||||
ADDQ R15, acc
|
||||
|
||||
// func Sum64(b []byte) uint64
|
||||
TEXT ·Sum64(SB), NOSPLIT, $0-32
|
||||
// Load fixed primes.
|
||||
MOVQ ·prime1v(SB), R13
|
||||
MOVQ ·prime2v(SB), R14
|
||||
MOVQ ·prime4v(SB), R15
|
||||
|
||||
// Load slice.
|
||||
MOVQ b_base+0(FP), CX
|
||||
MOVQ b_len+8(FP), DX
|
||||
LEAQ (CX)(DX*1), BX
|
||||
|
||||
// The first loop limit will be len(b)-32.
|
||||
SUBQ $32, BX
|
||||
|
||||
// Check whether we have at least one block.
|
||||
CMPQ DX, $32
|
||||
JLT noBlocks
|
||||
|
||||
// Set up initial state (v1, v2, v3, v4).
|
||||
MOVQ R13, R8
|
||||
ADDQ R14, R8
|
||||
MOVQ R14, R9
|
||||
XORQ R10, R10
|
||||
XORQ R11, R11
|
||||
SUBQ R13, R11
|
||||
|
||||
// Loop until CX > BX.
|
||||
blockLoop:
|
||||
round(R8)
|
||||
round(R9)
|
||||
round(R10)
|
||||
round(R11)
|
||||
|
||||
CMPQ CX, BX
|
||||
JLE blockLoop
|
||||
|
||||
MOVQ R8, AX
|
||||
ROLQ $1, AX
|
||||
MOVQ R9, R12
|
||||
ROLQ $7, R12
|
||||
ADDQ R12, AX
|
||||
MOVQ R10, R12
|
||||
ROLQ $12, R12
|
||||
ADDQ R12, AX
|
||||
MOVQ R11, R12
|
||||
ROLQ $18, R12
|
||||
ADDQ R12, AX
|
||||
|
||||
mergeRound(AX, R8)
|
||||
mergeRound(AX, R9)
|
||||
mergeRound(AX, R10)
|
||||
mergeRound(AX, R11)
|
||||
|
||||
JMP afterBlocks
|
||||
|
||||
noBlocks:
|
||||
MOVQ ·prime5v(SB), AX
|
||||
|
||||
afterBlocks:
|
||||
ADDQ DX, AX
|
||||
|
||||
// Right now BX has len(b)-32, and we want to loop until CX > len(b)-8.
|
||||
ADDQ $24, BX
|
||||
|
||||
CMPQ CX, BX
|
||||
JG fourByte
|
||||
|
||||
wordLoop:
|
||||
// Calculate k1.
|
||||
MOVQ (CX), R8
|
||||
ADDQ $8, CX
|
||||
IMULQ R14, R8
|
||||
ROLQ $31, R8
|
||||
IMULQ R13, R8
|
||||
|
||||
XORQ R8, AX
|
||||
ROLQ $27, AX
|
||||
IMULQ R13, AX
|
||||
ADDQ R15, AX
|
||||
|
||||
CMPQ CX, BX
|
||||
JLE wordLoop
|
||||
|
||||
fourByte:
|
||||
ADDQ $4, BX
|
||||
CMPQ CX, BX
|
||||
JG singles
|
||||
|
||||
MOVL (CX), R8
|
||||
ADDQ $4, CX
|
||||
IMULQ R13, R8
|
||||
XORQ R8, AX
|
||||
|
||||
ROLQ $23, AX
|
||||
IMULQ R14, AX
|
||||
ADDQ ·prime3v(SB), AX
|
||||
|
||||
singles:
|
||||
ADDQ $4, BX
|
||||
CMPQ CX, BX
|
||||
JGE finalize
|
||||
|
||||
singlesLoop:
|
||||
MOVBQZX (CX), R12
|
||||
ADDQ $1, CX
|
||||
IMULQ ·prime5v(SB), R12
|
||||
XORQ R12, AX
|
||||
|
||||
ROLQ $11, AX
|
||||
IMULQ R13, AX
|
||||
|
||||
CMPQ CX, BX
|
||||
JL singlesLoop
|
||||
|
||||
finalize:
|
||||
MOVQ AX, R12
|
||||
SHRQ $33, R12
|
||||
XORQ R12, AX
|
||||
IMULQ R14, AX
|
||||
MOVQ AX, R12
|
||||
SHRQ $29, R12
|
||||
XORQ R12, AX
|
||||
IMULQ ·prime3v(SB), AX
|
||||
MOVQ AX, R12
|
||||
SHRQ $32, R12
|
||||
XORQ R12, AX
|
||||
|
||||
MOVQ AX, ret+24(FP)
|
||||
RET
|
||||
|
||||
// writeBlocks uses the same registers as above except that it uses AX to store
|
||||
// the x pointer.
|
||||
|
||||
// func writeBlocks(x *xxh, b []byte) []byte
|
||||
TEXT ·writeBlocks(SB), NOSPLIT, $0-56
|
||||
// Load fixed primes needed for round.
|
||||
MOVQ ·prime1v(SB), R13
|
||||
MOVQ ·prime2v(SB), R14
|
||||
|
||||
// Load slice.
|
||||
MOVQ b_base+8(FP), CX
|
||||
MOVQ CX, ret_base+32(FP) // initialize return base pointer; see NOTE below
|
||||
MOVQ b_len+16(FP), DX
|
||||
LEAQ (CX)(DX*1), BX
|
||||
SUBQ $32, BX
|
||||
|
||||
// Load vN from x.
|
||||
MOVQ x+0(FP), AX
|
||||
MOVQ 0(AX), R8 // v1
|
||||
MOVQ 8(AX), R9 // v2
|
||||
MOVQ 16(AX), R10 // v3
|
||||
MOVQ 24(AX), R11 // v4
|
||||
|
||||
// We don't need to check the loop condition here; this function is
|
||||
// always called with at least one block of data to process.
|
||||
blockLoop:
|
||||
round(R8)
|
||||
round(R9)
|
||||
round(R10)
|
||||
round(R11)
|
||||
|
||||
CMPQ CX, BX
|
||||
JLE blockLoop
|
||||
|
||||
// Copy vN back to x.
|
||||
MOVQ R8, 0(AX)
|
||||
MOVQ R9, 8(AX)
|
||||
MOVQ R10, 16(AX)
|
||||
MOVQ R11, 24(AX)
|
||||
|
||||
// Construct return slice.
|
||||
// NOTE: It's important that we don't construct a slice that has a base
|
||||
// pointer off the end of the original slice, as in Go 1.7+ this will
|
||||
// cause runtime crashes. (See discussion in, for example,
|
||||
// https://github.com/golang/go/issues/16772.)
|
||||
// Therefore, we calculate the length/cap first, and if they're zero, we
|
||||
// keep the old base. This is what the compiler does as well if you
|
||||
// write code like
|
||||
// b = b[len(b):]
|
||||
|
||||
// New length is 32 - (CX - BX) -> BX+32 - CX.
|
||||
ADDQ $32, BX
|
||||
SUBQ CX, BX
|
||||
JZ afterSetBase
|
||||
|
||||
MOVQ CX, ret_base+32(FP)
|
||||
|
||||
afterSetBase:
|
||||
MOVQ BX, ret_len+40(FP)
|
||||
MOVQ BX, ret_cap+48(FP) // set cap == len
|
||||
|
||||
RET
|
||||
|
|
@ -0,0 +1,75 @@
|
|||
// +build !amd64 appengine !gc purego
|
||||
|
||||
package xxhash
|
||||
|
||||
// Sum64 computes the 64-bit xxHash digest of b.
|
||||
func Sum64(b []byte) uint64 {
|
||||
// A simpler version would be
|
||||
// x := New()
|
||||
// x.Write(b)
|
||||
// return x.Sum64()
|
||||
// but this is faster, particularly for small inputs.
|
||||
|
||||
n := len(b)
|
||||
var h uint64
|
||||
|
||||
if n >= 32 {
|
||||
v1 := prime1v + prime2
|
||||
v2 := prime2
|
||||
v3 := uint64(0)
|
||||
v4 := -prime1v
|
||||
for len(b) >= 32 {
|
||||
v1 = round(v1, u64(b[0:8:len(b)]))
|
||||
v2 = round(v2, u64(b[8:16:len(b)]))
|
||||
v3 = round(v3, u64(b[16:24:len(b)]))
|
||||
v4 = round(v4, u64(b[24:32:len(b)]))
|
||||
b = b[32:len(b):len(b)]
|
||||
}
|
||||
h = rol1(v1) + rol7(v2) + rol12(v3) + rol18(v4)
|
||||
h = mergeRound(h, v1)
|
||||
h = mergeRound(h, v2)
|
||||
h = mergeRound(h, v3)
|
||||
h = mergeRound(h, v4)
|
||||
} else {
|
||||
h = prime5
|
||||
}
|
||||
|
||||
h += uint64(n)
|
||||
|
||||
i, end := 0, len(b)
|
||||
for ; i+8 <= end; i += 8 {
|
||||
k1 := round(0, u64(b[i:i+8:len(b)]))
|
||||
h ^= k1
|
||||
h = rol27(h)*prime1 + prime4
|
||||
}
|
||||
if i+4 <= end {
|
||||
h ^= uint64(u32(b[i:i+4:len(b)])) * prime1
|
||||
h = rol23(h)*prime2 + prime3
|
||||
i += 4
|
||||
}
|
||||
for ; i < end; i++ {
|
||||
h ^= uint64(b[i]) * prime5
|
||||
h = rol11(h) * prime1
|
||||
}
|
||||
|
||||
h ^= h >> 33
|
||||
h *= prime2
|
||||
h ^= h >> 29
|
||||
h *= prime3
|
||||
h ^= h >> 32
|
||||
|
||||
return h
|
||||
}
|
||||
|
||||
func writeBlocks(x *xxh, b []byte) []byte {
|
||||
v1, v2, v3, v4 := x.v1, x.v2, x.v3, x.v4
|
||||
for len(b) >= 32 {
|
||||
v1 = round(v1, u64(b[0:8:len(b)]))
|
||||
v2 = round(v2, u64(b[8:16:len(b)]))
|
||||
v3 = round(v3, u64(b[16:24:len(b)]))
|
||||
v4 = round(v4, u64(b[24:32:len(b)]))
|
||||
b = b[32:len(b):len(b)]
|
||||
}
|
||||
x.v1, x.v2, x.v3, x.v4 = v1, v2, v3, v4
|
||||
return b
|
||||
}
|
||||
|
|
@ -0,0 +1,10 @@
|
|||
// +build appengine
|
||||
|
||||
// This file contains the safe implementations of otherwise unsafe-using code.
|
||||
|
||||
package xxhash
|
||||
|
||||
// Sum64String computes the 64-bit xxHash digest of s.
|
||||
func Sum64String(s string) uint64 {
|
||||
return Sum64([]byte(s))
|
||||
}
|
||||
|
|
@ -0,0 +1,30 @@
|
|||
// +build !appengine
|
||||
|
||||
// This file encapsulates usage of unsafe.
|
||||
// xxhash_safe.go contains the safe implementations.
|
||||
|
||||
package xxhash
|
||||
|
||||
import (
|
||||
"reflect"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
// Sum64String computes the 64-bit xxHash digest of s.
|
||||
// It may be faster than Sum64([]byte(s)) by avoiding a copy.
|
||||
//
|
||||
// TODO(caleb): Consider removing this if an optimization is ever added to make
|
||||
// it unnecessary: https://golang.org/issue/2205.
|
||||
//
|
||||
// TODO(caleb): We still have a function call; we could instead write Go/asm
|
||||
// copies of Sum64 for strings to squeeze out a bit more speed.
|
||||
func Sum64String(s string) uint64 {
|
||||
// See https://groups.google.com/d/msg/golang-nuts/dcjzJy-bSpw/tcZYBzQqAQAJ
|
||||
// for some discussion about this unsafe conversion.
|
||||
var b []byte
|
||||
bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
|
||||
bh.Data = (*reflect.StringHeader)(unsafe.Pointer(&s)).Data
|
||||
bh.Len = len(s)
|
||||
bh.Cap = len(s)
|
||||
return Sum64(b)
|
||||
}
|
||||
|
|
@ -20,6 +20,8 @@ github.com/Azure/go-autorest/logger
|
|||
github.com/Azure/go-autorest/tracing
|
||||
# github.com/cenkalti/backoff v2.1.1+incompatible
|
||||
github.com/cenkalti/backoff
|
||||
# github.com/cespare/xxhash v1.1.0
|
||||
github.com/cespare/xxhash
|
||||
# github.com/cpuguy83/go-md2man v1.0.10
|
||||
github.com/cpuguy83/go-md2man/md2man
|
||||
# github.com/dgrijalva/jwt-go v3.2.0+incompatible
|
||||
|
|
|
|||
Loading…
Reference in New Issue