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Add fpc compression and decompression mutators #850

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87e7b25
Add fpc compression and decompression mutators
batmac Apr 14, 2025
4a6fdea
change category
batmac Apr 14, 2025
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1 change: 1 addition & 0 deletions go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -131,6 +131,7 @@ require (
github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
github.com/rivo/uniseg v0.4.7 // indirect
github.com/rs/xid v1.6.0 // indirect
github.com/spenczar/fpc v1.0.0 // indirect
github.com/xanzy/go-gitlab v0.115.0 // indirect
go.opencensus.io v0.24.0 // indirect
go.opentelemetry.io/contrib/detectors/gcp v1.29.0 // indirect
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2 changes: 2 additions & 0 deletions go.sum
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Expand Up @@ -323,6 +323,8 @@ github.com/smartystreets/assertions v1.2.0 h1:42S6lae5dvLc7BrLu/0ugRtcFVjoJNMC/N
github.com/smartystreets/assertions v1.2.0/go.mod h1:tcbTF8ujkAEcZ8TElKY+i30BzYlVhC/LOxJk7iOWnoo=
github.com/smartystreets/gunit v1.4.2 h1:tyWYZffdPhQPfK5VsMQXfauwnJkqg7Tv5DLuQVYxq3Q=
github.com/smartystreets/gunit v1.4.2/go.mod h1:ZjM1ozSIMJlAz/ay4SG8PeKF00ckUp+zMHZXV9/bvak=
github.com/spenczar/fpc v1.0.0 h1:H0NtafmaWbJhSghiU5oilPzh/5kdbtQ8nTBt9I4dLMA=
github.com/spenczar/fpc v1.0.0/go.mod h1:14BNj23NWSW7Hf2jk29+fpk9ufQKUGMCefCj9vgjwBU=
github.com/spf13/pflag v1.0.6 h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=
github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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32 changes: 32 additions & 0 deletions pkg/mutators/single/fpc.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,32 @@
package mutators

import (
"io"

"github.com/spenczar/fpc"
)

func init() {
singleRegister("fpc", wfpc, withDescription("compress 64bit floats"),
withCategory("specific compress"),
)
singleRegister("unfpc", rfpc, withDescription("decompress 64bit floats"),
withCategory("specific decompress"),
)
}

func wfpc(out io.WriteCloser, in io.ReadCloser, _ any) (int64, error) {
f := fpc.NewWriter(out)

// the buffer must obviously be a multiple of 8
n, err := io.CopyBuffer(f, in, make([]byte, 8*1024))
if err != nil {
return n, err
}
err = f.Close()
return n, err
}

func rfpc(out io.WriteCloser, in io.ReadCloser, _ any) (int64, error) {
return io.Copy(out, fpc.NewReader(in))
}
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