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package zstd
/*
From https://github.com/dustin/randbo
All credits for the code below goes there :) (There wasn't a license so I'm distributing as is)
*/
import (
"io"
"math/rand"
"time"
)
// randbytes creates a stream of non-crypto quality random bytes
type randbytes struct {
rand.Source
}
// NewRandBytes creates a new random reader with a time source.
func NewRandBytes() io.Reader {
return NewRandBytesFrom(rand.NewSource(time.Now().UnixNano()))
}
// NewRandBytesFrom creates a new reader from your own rand.Source
func NewRandBytesFrom(src rand.Source) io.Reader {
return &randbytes{src}
}
// Read satisfies io.Reader
func (r *randbytes) Read(p []byte) (n int, err error) {
todo := len(p)
offset := 0
for {
val := int64(r.Int63())
for i := 0; i < 8; i++ {
p[offset] = byte(val)
todo--
if todo == 0 {
return len(p), nil
}
offset++
val >>= 8
}
}
}
|
