add xxhash 64

checksum/xxh.go

@@ -0,0 +1,32 @@
+package checksum
+
+import (
+	"github.com/cespare/xxhash"
+	"hash"
+)
+
+type (
+	Xxh64 struct {
+		d hash.Hash
+	}
+)
+
+func (m *Xxh64) String() string {
+	return "xxhash64"
+}
+
+func (m *Xxh64) Append(data []byte) {
+	if m.d == nil {
+		m.d = xxhash.New()
+	}
+
+	m.d.Write(data)
+}
+
+func (m *Xxh64) Finish() []byte {
+	if m.d == nil {
+		m.d = xxhash.New()
+	}
+
+	return m.d.Sum(nil)
+}

checksum/xxhash64_test.go

@@ -0,0 +1,57 @@
+package checksum
+
+import (
+	"github.com/cespare/xxhash"
+	"github.com/tursom/checksum/assert"
+	"hash"
+	"testing"
+)
+
+func TestXxh64_Finish(t *testing.T) {
+	type fields struct {
+		d hash.Hash
+	}
+	tests := []struct {
+		name    string
+		fields  fields
+		builder func(m *Xxh64)
+		want    []byte
+	}{
+		{
+			"nil",
+			fields{},
+			nil,
+			xxhash.New().Sum(nil),
+		},
+		{
+			"hello",
+			fields{},
+			func(m *Xxh64) {
+				m.Append([]byte("hello"))
+			},
+			xxh64Sum([]byte("hello")),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			m := &Xxh64{
+				d: tt.fields.d,
+			}
+			if tt.builder != nil {
+				tt.builder(m)
+			}
+
+			assert.Equals(t, m.Finish(), tt.want)
+		})
+	}
+}
+
+func xxh64Sum(b []byte) []byte {
+	h := xxhash.New()
+	_, _ = h.Write(b)
+	return h.Sum(nil)
+}
+
+func TestXxh64_String(t *testing.T) {
+	assert.Equals(t, (&Xxh64{}).String(), "xxhash64")
+}

cmd/checksum/main.go

@@ -31,6 +31,7 @@ var (
 		func() checksum.Func { return &checksum.Fnv64a{} },
 		func() checksum.Func { return &checksum.Fnv128{} },
 		func() checksum.Func { return &checksum.Fnv128a{} },
+		func() checksum.Func { return &checksum.Xxh64{} },
 	}
 )
 

go.mod

@@ -2,4 +2,7 @@ module github.com/tursom/checksum
 
 go 1.20
 
-require github.com/twmb/murmur3 v1.1.8
+require (
+	github.com/cespare/xxhash v1.1.0
+	github.com/twmb/murmur3 v1.1.8
+)

go.sum

@@ -1,2 +1,8 @@
+github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
+github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72 h1:qLC7fQah7D6K1B0ujays3HV9gkFtllcxhzImRR7ArPQ=
+github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/twmb/murmur3 v1.1.8 h1:8Yt9taO/WN3l08xErzjeschgZU2QSrwm1kclYq+0aRg=
 github.com/twmb/murmur3 v1.1.8/go.mod h1:Qq/R7NUyOfr65zD+6Q5IHKsJLwP7exErjN6lyyq3OSQ=