syncthing/vendor/github.com/cznic/mathutil/example/example.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"
	"github.com/cznic/mathutil"
	"log"
	"math"
	"os"
)

/*

$ # Usage e.g.:
$ go run example.go -max 1024 > mathutil.dat # generate 1kB of "random" data

*/
func main() {
	r, err := mathutil.NewFC32(math.MinInt32, math.MaxInt32, true)
	if err != nil {
		log.Fatal(err)
	}

	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.Next())); err != nil {
				log.Fatal(err)
			}
		}
		stdout.Flush()
		return
	}

	for stdout.WriteByte(byte(r.Next())) == nil {
	}
}