package azblob

import (

	"errors"

)

type bytesWriter []byte

func newBytesWriter(b []byte) bytesWriter {

	return b

}

func (c bytesWriter) WriteAt(b []byte, off int64) (int, error) {

	if off >= int64(len(c)) || off < 0 {

		return 0, errors.New("Offset value is out of range")

	}

	n := copy(c[int(off):], b)

	if n < len(b) {

		return n, errors.New("Not enough space for all bytes")

	}

	return n, nil

}