diff --git a/.vscode/launch.json b/.vscode/launch.json new file mode 100644 index 0000000..69802ff --- /dev/null +++ b/.vscode/launch.json @@ -0,0 +1,17 @@ +{ + // Use IntelliSense to learn about possible attributes. + // Hover to view descriptions of existing attributes. + // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387 + "version": "0.2.0", + "configurations": [ + { + "name": "Debug", + "type": "go", + "request": "launch", + "mode": "debug", + "program": "${fileDirname}", + "env": {}, + "args": [] + } + ] +} \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..b95a004 --- /dev/null +++ b/go.mod @@ -0,0 +1,21 @@ +module tildegit.org/PigeonProtocolConsortium/pigeongo + +go 1.14 + +require ( + github.com/cosiner/argv v0.1.0 // indirect + github.com/go-delve/delve v1.4.0 // indirect + github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect + github.com/mattn/go-colorable v0.1.6 // indirect + github.com/mattn/go-runewidth v0.0.9 // indirect + github.com/peterh/liner v1.2.0 // indirect + github.com/sirupsen/logrus v1.5.0 // indirect + github.com/spf13/cobra v1.0.0 // indirect + github.com/spf13/pflag v1.0.5 // indirect + github.com/stretchr/testify v1.5.1 + go.starlark.net v0.0.0-20200330013621-be5394c419b6 // indirect + golang.org/x/arch v0.0.0-20200312215426-ff8b605520f4 // indirect + golang.org/x/crypto v0.0.0-20200414173820-0848c9571904 // indirect + golang.org/x/sys v0.0.0-20200413165638-669c56c373c4 // indirect + gopkg.in/yaml.v2 v2.2.8 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..0a8c724 --- /dev/null +++ b/go.sum @@ -0,0 +1,213 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU= +github.com/alecthomas/template 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h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4= diff --git a/internal/b32enc.go b/internal/b32enc.go new file mode 100644 index 0000000..8807a5d --- /dev/null +++ b/internal/b32enc.go @@ -0,0 +1,2 @@ +package internal + diff --git a/internal/cmd/lipsenq/generate/generate.go b/internal/cmd/lipsenq/generate/generate.go new file mode 100755 index 0000000..0187ce9 --- /dev/null +++ b/internal/cmd/lipsenq/generate/generate.go @@ -0,0 +1,12 @@ +package generate + +import "github.com/spf13/cobra" + +var GenCmd = cobra.Command{ + Use: "generate", + Short: "Generate Lipmaa related artifacts" +} + +func init() { + GenCmd.AddCommand(seqCmd) +} \ No newline at end of file diff --git a/internal/cmd/lipsenq/generate/layer_sequences.go b/internal/cmd/lipsenq/generate/layer_sequences.go new file mode 100755 index 0000000..706db29 --- /dev/null +++ b/internal/cmd/lipsenq/generate/layer_sequences.go @@ -0,0 +1,31 @@ +package generate + +import ( + "tildegit.org/PigeonProtocolConsortium/pigeongo/internal/codec" + "github.com/spf13/cobra" +) + +var ( + seqConf = struct{ + Layer, Depth uint + Sequences []uint + } + seqCmd = cobra.Command{ + Use: "seq", + Short: "Generate Lipmaa Layer Sequences", + Run: func(cmd *cobra.Command, args []string) { + fmt.Println(code.CalculateLipmaaLayerSequence( + seqConf.Layer, seqConf.Depth, seqConf.Sequences + )) + } + } +) + +func init() { + seqCmd.Flags().UintVarP(*seqConf.Layer, "layer", "l", uint(1), + "The layer that you would like to start the sequence generation from") + seqCmd.Flags().UintVarP(*seqConf.Depth, "depth", "d", uint(1), + "The Layer that you would like to stop the sequence generation at") + seqCmd.Flags().UintSliceVarP(*seqConf.Sequences, "sequences", "s", []uint{0}, + "A list of sequences that you'de like to start with") +} \ No newline at end of file diff --git a/internal/cmd/lipsenq/go.mod b/internal/cmd/lipsenq/go.mod new file mode 100755 index 0000000..189d794 --- /dev/null +++ b/internal/cmd/lipsenq/go.mod @@ -0,0 +1,8 @@ +module tildegit.org/PigeonProtocolConsortium/pigeongo/internal/cmd/lipsenq + +go 1.14 + +require ( + github.com/spf13/cobra v1.0.0 + github.com/spf13/viper v1.6.3 +) diff --git a/internal/cmd/lipsenq/go.sum b/internal/cmd/lipsenq/go.sum new file mode 100755 index 0000000..4ce7611 --- /dev/null +++ b/internal/cmd/lipsenq/go.sum @@ -0,0 +1,160 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU= +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/armon/consul-api 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h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I= +gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +tildegit.org/PigeonProtocolConsortium/pigeongo v0.0.0-20200405022930-c67d446382dc h1:bDNJML2HHtzjO0PagjL7KdnabXZk7IE1FpLZjepCbuc= diff --git a/internal/cmd/lipsenq/main.go b/internal/cmd/lipsenq/main.go new file mode 100755 index 0000000..cbe7f2c --- /dev/null +++ b/internal/cmd/lipsenq/main.go @@ -0,0 +1,25 @@ +package main + +import ( + "github.com/spf13/cobra" + + "tildegit.org/PigeonProtocolConsortium/pigeongo/internal/cmd/lipsenq/generate" +) + +var ( + rootCmd = &cobra.Command{ + Use: "lipsenq", + Short: "A tool for lipmaa Layer Sequences", + Run: func(cmd *cobra.Command, args []string) { + cmd.Help() + }, + } +) + +func init() { + rootCmd.AddCommand(generate.GenCmd) +} + +func main() { + rootCmd.Execute() +} \ No newline at end of file diff --git a/internal/codec/lipmaa.go b/internal/codec/lipmaa.go new file mode 100644 index 0000000..7671711 --- /dev/null +++ b/internal/codec/lipmaa.go @@ -0,0 +1,75 @@ +package codec + +// CalculateLipmaaLayerSequence calculates a set of nearest lipmaa +// layer natural indexes given the current layer, requested depth, and +// a starting set. It follows these basic math rules: +// +// Given: +// - N: N ∈ {0,1,2...} +// - l: l ∈ N +// - d: d ∈ N +// - x: I->X i|->floor(log(x))+1 = x(i) +// - s: s ⊊ {0,1,4,13,40...} +// - c: c ∈ s ∧ c = 0 ∨ (c >= 1 ∧ x(l,s)) +// - v: v = (c*3)+1 +func CalculateLipmaaLayerSequence(l, d uint, s []uint) []uint { + sl := uint(len(s)) + // If the sequence set is empty make it equal to {0} + if sl == 0 { + s = append(s, 0) // Add the base value 0 + sl++ // Increment the sequence set length counter + } + // Calculate v based on the last value in the sequence set + c := s[sl-1] + v := (c * 3) + 1 + // If the length of the sequence set is less than the layer we are on + if sl < l { + l = sl // Make the layer equal to the sequence set length + s = s[:l] // Take only a valid set of sequences for the layer + } + // If the layer is equal to the requested depth + if l == d { + return s // Return the generated sequeces + } + // Expand the sequence set and layer + s = append(s, v) + l++ + // Calculate the next layer + return CalculateLipmaaLayerSequence(l, d, s) +} + +// lipmaaLink returns the lipmaa link index from a given index +func lipmaaLink(idx uint) uint { + if idx == 0 { + return 0 + } + n := int(idx) + k, po3, x := 1, 3, n + for { + if k >= n { + break + } + po3 *= 3 + k = (po3 - 1) / 2 + } + po3 /= 3 + if k != n { + for { + if x == 0 { + break + } + k = (po3 - 1) / 2 + po3 /= 3 + x %= k + } + if k != po3 { + po3 = k + } + } + return uint(n - po3) +} + +func lipmaaLink2(idx uint) uint { + return idx +} + diff --git a/internal/codec/lipmaa_test.go b/internal/codec/lipmaa_test.go new file mode 100644 index 0000000..b789e60 --- /dev/null +++ b/internal/codec/lipmaa_test.go @@ -0,0 +1,70 @@ +package codec + +import ( + "testing" + + "github.com/stretchr/testify/assert" +) + +type lipmaaLinkExample struct { + input, expected uint +} + +func Test_lipmaaLink(t *testing.T) { + tt := []lipmaaLinkExample{ + lipmaaLinkExample{0, 0}, + lipmaaLinkExample{1, 0}, + lipmaaLinkExample{2, 1}, + lipmaaLinkExample{3, 2}, + lipmaaLinkExample{4, 1}, + lipmaaLinkExample{5, 4}, + lipmaaLinkExample{6, 5}, + lipmaaLinkExample{7, 6}, + lipmaaLinkExample{8, 4}, + lipmaaLinkExample{13, 4}, + } + for _, td := range tt { + assert.Equal(t, td.expected, lipmaaLink(td.input)) + } + // for _, td := range tt { + // assert.Equal(t, td.expected, lipmaaLink2(td.input)) + // } +} + +type lipmaaLSExample struct { + l, d uint + expected []uint +} + +func TestCalculateLipmaaLayerSequence_fromzero(t *testing.T) { + tt := []lipmaaLSExample{} + var v, l, d uint = 0, 1, 10 + s := []uint{0} + for l < d { + tl := lipmaaLSExample{l, l, s} + tt = append(tt, tl) + v = (v * 3) + 1 + s = append(s, v) + l++ + } + for _, td := range tt { + a := CalculateLipmaaLayerSequence(td.l, td.d, []uint{}) + assert.Equal(t, td.expected, a) + } +} +func BenchmarkCalulatedLipmaaLayerSequence(b *testing.B) { + for i := 0; i < b.N; i++ { + b.Run("depth=10", newBenchmarkCalulatedLipmaaLayerSequence(10)) + b.Run("depth=1000", newBenchmarkCalulatedLipmaaLayerSequence(1000)) + b.Run("depth=100000", newBenchmarkCalulatedLipmaaLayerSequence(100000)) + b.Run("depth=1000000", newBenchmarkCalulatedLipmaaLayerSequence(1000000)) + } +} + +func newBenchmarkCalulatedLipmaaLayerSequence(d uint) func(b *testing.B) { + return func(b *testing.B) { + var seq []uint + b.ResetTimer() + seq = CalculateLipmaaLayerSequence(1, d, seq) + } +} diff --git a/internal/encoder.go b/internal/encoder.go new file mode 100644 index 0000000..8807a5d --- /dev/null +++ b/internal/encoder.go @@ -0,0 +1,2 @@ +package internal + diff --git a/pigeongo.go b/pigeongo.go new file mode 100644 index 0000000..014bd27 --- /dev/null +++ b/pigeongo.go @@ -0,0 +1 @@ +package pigeongo \ No newline at end of file