syncthing/vendor/github.com/cznic/mathutil/example3/example3.go
2016-06-02 13:53:30 +02:00

44 lines
783 B
Go

// Copyright (c) 2011 CZ.NIC z.s.p.o. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// blame: jnml, labs.nic.cz
// +build ignore
package main
import (
"bufio"
"flag"
"log"
"math/rand"
"os"
)
/*
$ # Usage e.g.:
$ go run example3.go -max 1024 > rand.dat # generate 1kB of "random" data
*/
func main() {
r := rand.New(rand.NewSource(1))
var mflag uint64
flag.Uint64Var(&mflag, "max", 0, "limit output to max bytes")
flag.Parse()
stdout := bufio.NewWriter(os.Stdout)
if mflag != 0 {
for i := uint64(0); i < mflag; i++ {
if err := stdout.WriteByte(byte(r.Int())); err != nil {
log.Fatal(err)
}
}
stdout.Flush()
return
}
for stdout.WriteByte(byte(r.Int())) == nil {
}
}