Update for math/rand/v2 package

README.md

@@ -1,4 +1,4 @@
-# [goark/mt][mt] -- [Mersenne Twister]; Pseudo Random Number Generator, Implemented by [Golang]
+# [goark/mt][github.com/goark/mt/v2] -- [Mersenne Twister]; Pseudo Random Number Generator, Implemented by [Golang][Go]
 
 [![check vulns](https://github.com/goark/mt/workflows/vulns/badge.svg)](https://github.com/goark/mt/actions)
 [![lint status](https://github.com/goark/mt/workflows/lint/badge.svg)](https://github.com/goark/mt/actions)
@@ -7,36 +7,47 @@
 
 This package is "[Mersenne Twister]" algorithm, implemented by pure [Go].
 
-- Compatible with [math/rand] standard package.
-- Concurrency-safe (if it uses [mt].PRNG type)
+- required Go 1.22 or later
+- Compatible with [math/rand/v2] standard package.
+- Concurrency-safe (if it uses [mt][github.com/goark/mt/v2].PRNG type)
 
-**Migrated repository to [github.com/goark/mt][mt]**
+**Migrated repository to [github.com/goark/mt][github.com/goark/mt/v2]**
 
 ## Usage
 
-### Usage with [math/rand] Standard Package (not concurrency-safe)
+### Import
 
 ```go
+import "github.com/goark/mt/v2"
+```
+
+### Usage with [math/rand/v2] Standard Package (not concurrency-safe)
+
+```go
+package main
+
 import (
     "fmt"
-    "math/rand"
+    "math/rand/v2"
 
-    "github.com/goark/mt/mt19937"
+    "github.com/goark/mt/v2/mt19937"
 )
 
-fmt.Println(rand.New(mt19937.New(19650218)).Uint64())
-//Output:
-//13735441942630277712
+func main() {
+    fmt.Println(rand.New(mt19937.New(19650218)).Uint64())
+    //Output:
+    //13735441942630277712
+}
 ```
 
-### Usage of [mt].PRNG type (concurrency-safe version)
+### Usage of [mt][github.com/goark/mt/v2].PRNG type (concurrency-safe version)
 
 ```go
 import (
     "fmt"
 
-    "github.com/goark/mt"
-    "github.com/goark/mt/mt19937"
+    "github.com/goark/mt/v2"
+    "github.com/goark/mt/v2/mt19937"
 )
 
 fmt.Println(mt.New(mt19937.New(19650218)).Uint64())
@@ -47,30 +58,31 @@ fmt.Println(mt.New(mt19937.New(19650218)).Uint64())
 #### Use [io].Reader interface
 
 ```go
-package main
-
 import (
+    "encoding/binary"
     "fmt"
+    "math/rand/v2"
     "sync"
 
-    "github.com/goark/mt"
-    "github.com/goark/mt/mt19937"
+    "github.com/goark/mt/v2"
+    "github.com/goark/mt/v2/mt19937"
 )
 
 func main() {
-    prng := mt.New(mt19937.New(19650218))
     wg := sync.WaitGroup{}
+    prng := mt.New(mt19937.New(rand.Int64()))
     for i := 0; i < 1000; i++ {
         wg.Add(1)
         go func() {
             defer wg.Done()
             r := prng.NewReader()
+            buf := [8]byte{}
             for i := 0; i < 10000; i++ {
-                buf := [8]byte{}
-                _, err := r.Read(buf[:])
+                ct, err := r.Read(buf[:])
                 if err != nil {
                     return
                 }
+                fmt.Println(binary.LittleEndian.Uint64(buf[:ct]))
             }
         }()
     }
@@ -84,15 +96,16 @@ func main() {
 $ go test -bench Random -benchmem ./benchmark
 goos: linux
 goarch: amd64
-pkg: github.com/goark/mt/benchmark
-BenchmarkRandomALFG-4            	1000000000	         0.0466 ns/op	       0 B/op	       0 allocs/op
-BenchmarkRandomMT19917-4         	1000000000	         0.0649 ns/op	       0 B/op	       0 allocs/op
-BenchmarkRandomALFGRand-4        	1000000000	         0.0720 ns/op	       0 B/op	       0 allocs/op
-BenchmarkRandomMT19917Rand-4     	1000000000	         0.0862 ns/op	       0 B/op	       0 allocs/op
-BenchmarkRandomALFGLocked-4      	1000000000	         0.172 ns/op	       0 B/op	       0 allocs/op
-BenchmarkRandomMT19917Locked-4   	1000000000	         0.192 ns/op	       0 B/op	       0 allocs/op
+pkg: github.com/goark/mt/v2/benchmark
+cpu: AMD Ryzen 5 PRO 4650G with Radeon Graphics
+BenchmarkRandomPCG-12              	785103775	         2.031 ns/op	       0 B/op	       0 allocs/op
+BenchmarkRandomMT19917-12          	338082381	         3.551 ns/op	       0 B/op	       0 allocs/op
+BenchmarkRandomPCGRand-12          	359948874	         3.288 ns/op	       0 B/op	       0 allocs/op
+BenchmarkRandomMT19917Rand-12      	325159622	         3.687 ns/op	       0 B/op	       0 allocs/op
+BenchmarkRandomChaCha8Locked-12    	186311572	         6.443 ns/op	       0 B/op	       0 allocs/op
+BenchmarkRandomMT19917Locked-12    	128465040	         9.346 ns/op	       0 B/op	       0 allocs/op
 PASS
-ok  	github.com/goark/mt/benchmark	6.895s
+ok  	github.com/goark/mt/v2/benchmark	10.408s
 ```
 
 ## License
@@ -102,9 +115,8 @@ This package is licensed under MIT license.
 - [Commercial Use of Mersenne Twister](http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/elicense.html)
 - [Mersenne Twisterの商業利用について](http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/license.html)
 
-[mt]: https://github.com/goark/mt "goark/mt: Mersenne Twister; Pseudo Random Number Generator, Implemented by Golang"
-[Go]: https://golang.org/ "The Go Programming Language"
-[Golang]: https://golang.org/ "The Go Programming Language"
-[math/rand]: https://golang.org/pkg/math/rand/ "rand - The Go Programming Language"
-[io]: https://golang.org/pkg/io/ "io - The Go Programming Language"
+[github.com/goark/mt/v2]: https://github.com/goark/mt "goark/mt: Mersenne Twister; Pseudo Random Number Generator, Implemented by Golang"
+[Go]: https://go.dev/ "The Go Programming Language"
+[math/rand/v2]: https://pkg.go.dev/math/rand/v2 "rand package - math/rand/v2 - Go Packages"
+[io]: https://pkg.go.dev/io "io package - io - Go Packages"
 [Mersenne Twister]: http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html "Mersenne Twister: A random number generator (since 1997/10)"

Taskfile.yml

@@ -18,7 +18,7 @@ tasks:
       - '**/*.go'
 
   prepare:
-      - go mod tidy -v -go=1.21
+      - go mod tidy -v -go=1.22
 
   clean:
     desc: Initialize module and build cache, and remake go.sum file.

benchmark/benchmark_test.go

@@ -1,66 +1,65 @@
 package benchmark
 
 import (
-	"math/rand"
+	"math/rand/v2"
 	"testing"
-	"time"
 
-	"github.com/goark/mt"
-	"github.com/goark/mt/mt19937"
+	"github.com/goark/mt/v2"
+	"github.com/goark/mt/v2/mt19937"
 )
 
-const count = 10000000
+var seed1, seed2, seed3 = rand.Uint64(), rand.Uint64(), rand.Int64()
 
-func BenchmarkRandomALFG(b *testing.B) {
-	rnd := rand.NewSource(time.Now().UnixNano()).(rand.Source64)
+func BenchmarkRandomPCG(b *testing.B) {
+	rnd := rand.NewPCG(seed1, seed2)
 	b.ResetTimer()
-	for i := 0; i < count; i++ {
-		rnd.Uint64()
+	for i := 0; i < b.N; i++ {
+		_ = rnd.Uint64()
 	}
 }
 
 func BenchmarkRandomMT19917(b *testing.B) {
-	rnd := mt19937.New(time.Now().UnixNano())
+	rnd := mt19937.New(seed3)
 	b.ResetTimer()
-	for i := 0; i < count; i++ {
-		rnd.Uint64()
+	for i := 0; i < b.N; i++ {
+		_ = rnd.Uint64()
 	}
 }
 
-func BenchmarkRandomALFGRand(b *testing.B) {
-	rnd := rand.New(rand.NewSource(time.Now().UnixNano()))
+func BenchmarkRandomPCGRand(b *testing.B) {
+	rnd := rand.New(rand.NewPCG(seed1, seed2))
 	b.ResetTimer()
-	for i := 0; i < count; i++ {
-		rnd.Uint64()
+	for i := 0; i < b.N; i++ {
+		_ = rnd.Uint64()
 	}
 }
 
 func BenchmarkRandomMT19917Rand(b *testing.B) {
-	rnd := rand.New(mt19937.New(time.Now().UnixNano()))
+	rnd := rand.New(mt19937.New(seed3))
 	b.ResetTimer()
-	for i := 0; i < count; i++ {
-		rnd.Uint64()
+	for i := 0; i < b.N; i++ {
+		_ = rnd.Uint64()
 	}
 }
 
-func BenchmarkRandomALFGLocked(b *testing.B) {
+func BenchmarkRandomChaCha8Locked(b *testing.B) {
 	b.ResetTimer()
-	for i := 0; i < count; i++ {
-		rand.Uint64()
+	for i := 0; i < b.N; i++ {
+		_ = rand.Uint64()
 	}
 }
 
 func BenchmarkRandomMT19917Locked(b *testing.B) {
-	rnd := mt.New(mt19937.New(time.Now().UnixNano()))
+	rnd := mt.New(mt19937.New(seed3))
 	b.ResetTimer()
-	for i := 0; i < count; i++ {
-		rnd.Uint64()
+	for i := 0; i < b.N; i++ {
+		_ = rnd.Uint64()
 	}
 }
 
 /* MIT License
  *
- * Copyright 2019 Spiegel
+ * Copyright 2019-2024 Spiegel
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal

go.mod

@@ -1,5 +1,5 @@
-module github.com/goark/mt
+module github.com/goark/mt/v2
 
-go 1.21
+go 1.22
 
 toolchain go1.22.1

mt19937/example_test.go

@@ -2,9 +2,9 @@ package mt19937_test
 
 import (
 	"fmt"
-	"math/rand"
+	"math/rand/v2"
 
-	"github.com/goark/mt/mt19937"
+	"github.com/goark/mt/v2/mt19937"
 )
 
 func ExampleNew() {
@@ -15,7 +15,7 @@ func ExampleNew() {
 
 /* MIT License
  *
- * Copyright 2019,2020 Spiegel
+ * Copyright 2019-2024 Spiegel
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal

mt19937/mt19937.go

@@ -1,37 +1,37 @@
 package mt19937
 
 import (
-	"github.com/goark/mt"
+	"github.com/goark/mt/v2"
 )
 
 const (
 	nn = 312
 	mm = nn / 2
 )
 
-//Source is a source of random numbers.
+// Source is a source of random numbers.
 type Source struct {
 	mt  [nn]uint64 //The array for the state vector
 	mti int        //mti==nn+1 means mt[nn] is not initialized
 }
 
 var _ mt.Source = (*Source)(nil) //Source is compatible with mt.Source interface
 
-//New returns a new pseudo-random source seeded with the given value.
+// New returns a new pseudo-random source seeded with the given value.
 func New(seed int64) *Source {
 	rng := &Source{mt: [nn]uint64{}, mti: nn + 1}
 	rng.Seed(seed)
 	return rng
 }
 
-//NewWithArray returns a new pseudo-random source seeded with the given values.
+// NewWithArray returns a new pseudo-random source seeded with the given values.
 func NewWithArray(seeds []uint64) *Source {
 	rng := &Source{mt: [nn]uint64{}, mti: nn + 1}
 	rng.SeedArray(seeds)
 	return rng
 }
 
-//Seed initializes Source with a seed
+// Seed initializes Source with a seed
 func (s *Source) Seed(seed int64) {
 	if s == nil {
 		return
@@ -42,7 +42,7 @@ func (s *Source) Seed(seed int64) {
 	}
 }
 
-//SeedArray initializes Source with seeds array
+// SeedArray initializes Source with seeds array
 func (s *Source) SeedArray(seeds []uint64) {
 	if s == nil {
 		return
@@ -89,7 +89,7 @@ var (
 	matrixA = [2]uint64{0, 0xB5026F5AA96619E9}
 )
 
-//Uint64 generates a random number on [0, 2^64-1]-interval
+// Uint64 generates a random number on [0, 2^64-1]-interval
 func (s *Source) Uint64() uint64 {
 	if s == nil {
 		return 0
@@ -120,12 +120,12 @@ func (s *Source) Uint64() uint64 {
 	return x
 }
 
-//Int63 generates a random number on [0, 2^63-1]-interval
-func (s *Source) Int63() int64 {
-	return (int64)(s.Uint64() >> 1)
-}
+// // Int63 generates a random number on [0, 2^63-1]-interval
+// func (s *Source) Int63() int64 {
+// 	return (int64)(s.Uint64() >> 1)
+// }
 
-//Real generates a random number
+// Real generates a random number
 // on [0,1)-real-interval if mode==1,
 // on (0,1)-real-interval if mode==2,
 // on [0,1]-real-interval others
@@ -145,7 +145,7 @@ func (s *Source) Real(mode int) float64 {
 
 /* MIT License
  *
- * Copyright 2019 Spiegel, fork from 64bit Mersenne Twister code "mt19937-64.c".
+ * Copyright 2019-2024 Spiegel, fork from 64bit Mersenne Twister code "mt19937-64.c".
  * (http://www.math.sci.hiroshima-u.ac.jp/m-mat/MT/mt64.html)
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy

mt19937/mt19937_test.go

@@ -444,29 +444,29 @@ func TestMT(t *testing.T) {
 
 func TestEmpty(t *testing.T) {
 	rnd := &Source{mt: [nn]uint64{}, mti: nn + 1}
-	r := rnd.Int63()
-	res := New(5489).Int63()
+	r := rnd.Uint64()
+	res := New(5489).Uint64()
 	if r != res {
 		t.Errorf("<empty>.Int63() = \"%v\", want \"%v\".", r, res)
 	}
 	rnd.SeedArray(nil)
-	r2 := rnd.Int63()
-	res2 := New(19650218).Int63()
+	r2 := rnd.Uint64()
+	res2 := New(19650218).Uint64()
 	if r2 != res2 {
 		t.Errorf("<empty>.Int63() = \"%v\", want \"%v\".", r2, res2)
 	}
 }
 
 func TestNil(t *testing.T) {
-	r := (*Source)(nil).Int63()
+	r := (*Source)(nil).Uint64()
 	if r != 0 {
-		t.Errorf("<nil>.Int63() = \"%v\", want \"%v\".", r, 0)
+		t.Errorf("<nil>.Uint64() = \"%v\", want \"%v\".", r, 0)
 	}
 }
 
 /* MIT License
  *
- * Copyright 2019,2020 Spiegel
+ * Copyright 2019-2024 Spiegel
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal